2 * mac80211 <-> driver interface
4 * Copyright 2002-2005, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
16 #include <linux/kernel.h>
17 #include <linux/if_ether.h>
18 #include <linux/skbuff.h>
19 #include <linux/device.h>
20 #include <linux/ieee80211.h>
21 #include <net/cfg80211.h>
22 #include <asm/unaligned.h>
27 * mac80211 is the Linux stack for 802.11 hardware that implements
28 * only partial functionality in hard- or firmware. This document
29 * defines the interface between mac80211 and low-level hardware
34 * DOC: Calling mac80211 from interrupts
36 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
37 * called in hardware interrupt context. The low-level driver must not call any
38 * other functions in hardware interrupt context. If there is a need for such
39 * call, the low-level driver should first ACK the interrupt and perform the
40 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
43 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also
44 * use the non-IRQ-safe functions!
50 * If you're reading this document and not the header file itself, it will
51 * be incomplete because not all documentation has been converted yet.
57 * As a general rule, when frames are passed between mac80211 and the driver,
58 * they start with the IEEE 802.11 header and include the same octets that are
59 * sent over the air except for the FCS which should be calculated by the
62 * There are, however, various exceptions to this rule for advanced features:
64 * The first exception is for hardware encryption and decryption offload
65 * where the IV/ICV may or may not be generated in hardware.
67 * Secondly, when the hardware handles fragmentation, the frame handed to
68 * the driver from mac80211 is the MSDU, not the MPDU.
70 * Finally, for received frames, the driver is able to indicate that it has
71 * filled a radiotap header and put that in front of the frame; if it does
72 * not do so then mac80211 may add this under certain circumstances.
76 * DOC: mac80211 workqueue
78 * mac80211 provides its own workqueue for drivers and internal mac80211 use.
79 * The workqueue is a single threaded workqueue and can only be accessed by
80 * helpers for sanity checking. Drivers must ensure all work added onto the
81 * mac80211 workqueue should be cancelled on the driver stop() callback.
83 * mac80211 will flushed the workqueue upon interface removal and during
86 * All work performed on the mac80211 workqueue must not acquire the RTNL lock.
91 * enum ieee80211_max_queues - maximum number of queues
93 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
95 enum ieee80211_max_queues {
96 IEEE80211_MAX_QUEUES = 4,
100 * enum ieee80211_ac_numbers - AC numbers as used in mac80211
101 * @IEEE80211_AC_VO: voice
102 * @IEEE80211_AC_VI: video
103 * @IEEE80211_AC_BE: best effort
104 * @IEEE80211_AC_BK: background
106 enum ieee80211_ac_numbers {
112 #define IEEE80211_NUM_ACS 4
115 * struct ieee80211_tx_queue_params - transmit queue configuration
117 * The information provided in this structure is required for QoS
118 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
120 * @aifs: arbitration interframe space [0..255]
121 * @cw_min: minimum contention window [a value of the form
122 * 2^n-1 in the range 1..32767]
123 * @cw_max: maximum contention window [like @cw_min]
124 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
125 * @uapsd: is U-APSD mode enabled for the queue
127 struct ieee80211_tx_queue_params {
135 struct ieee80211_low_level_stats {
136 unsigned int dot11ACKFailureCount;
137 unsigned int dot11RTSFailureCount;
138 unsigned int dot11FCSErrorCount;
139 unsigned int dot11RTSSuccessCount;
143 * enum ieee80211_bss_change - BSS change notification flags
145 * These flags are used with the bss_info_changed() callback
146 * to indicate which BSS parameter changed.
148 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
149 * also implies a change in the AID.
150 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
151 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
152 * @BSS_CHANGED_ERP_SLOT: slot timing changed
153 * @BSS_CHANGED_HT: 802.11n parameters changed
154 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
155 * @BSS_CHANGED_BEACON_INT: Beacon interval changed
156 * @BSS_CHANGED_BSSID: BSSID changed, for whatever
157 * reason (IBSS and managed mode)
158 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve
159 * new beacon (beaconing modes)
160 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
161 * enabled/disabled (beaconing modes)
162 * @BSS_CHANGED_CQM: Connection quality monitor config changed
163 * @BSS_CHANGED_IBSS: IBSS join status changed
164 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed.
165 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note
166 * that it is only ever disabled for station mode.
167 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface.
168 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode)
170 enum ieee80211_bss_change {
171 BSS_CHANGED_ASSOC = 1<<0,
172 BSS_CHANGED_ERP_CTS_PROT = 1<<1,
173 BSS_CHANGED_ERP_PREAMBLE = 1<<2,
174 BSS_CHANGED_ERP_SLOT = 1<<3,
175 BSS_CHANGED_HT = 1<<4,
176 BSS_CHANGED_BASIC_RATES = 1<<5,
177 BSS_CHANGED_BEACON_INT = 1<<6,
178 BSS_CHANGED_BSSID = 1<<7,
179 BSS_CHANGED_BEACON = 1<<8,
180 BSS_CHANGED_BEACON_ENABLED = 1<<9,
181 BSS_CHANGED_CQM = 1<<10,
182 BSS_CHANGED_IBSS = 1<<11,
183 BSS_CHANGED_ARP_FILTER = 1<<12,
184 BSS_CHANGED_QOS = 1<<13,
185 BSS_CHANGED_IDLE = 1<<14,
186 BSS_CHANGED_SSID = 1<<15,
188 /* when adding here, make sure to change ieee80211_reconfig */
192 * The maximum number of IPv4 addresses listed for ARP filtering. If the number
193 * of addresses for an interface increase beyond this value, hardware ARP
194 * filtering will be disabled.
196 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4
199 * enum ieee80211_rssi_event - RSSI threshold event
200 * An indicator for when RSSI goes below/above a certain threshold.
201 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver.
202 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver.
204 enum ieee80211_rssi_event {
210 * struct ieee80211_bss_conf - holds the BSS's changing parameters
212 * This structure keeps information about a BSS (and an association
213 * to that BSS) that can change during the lifetime of the BSS.
215 * @assoc: association status
216 * @ibss_joined: indicates whether this station is part of an IBSS
218 * @aid: association ID number, valid only when @assoc is true
219 * @use_cts_prot: use CTS protection
220 * @use_short_preamble: use 802.11b short preamble;
221 * if the hardware cannot handle this it must set the
222 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag
223 * @use_short_slot: use short slot time (only relevant for ERP);
224 * if the hardware cannot handle this it must set the
225 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag
226 * @dtim_period: num of beacons before the next DTIM, for beaconing,
227 * valid in station mode only while @assoc is true and if also
228 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf
230 * @timestamp: beacon timestamp
231 * @beacon_int: beacon interval
232 * @assoc_capability: capabilities taken from assoc resp
233 * @basic_rates: bitmap of basic rates, each bit stands for an
234 * index into the rate table configured by the driver in
236 * @mcast_rate: per-band multicast rate index + 1 (0: disabled)
237 * @bssid: The BSSID for this BSS
238 * @enable_beacon: whether beaconing should be enabled or not
239 * @channel_type: Channel type for this BSS -- the hardware might be
240 * configured for HT40+ while this BSS only uses no-HT, for
242 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info).
243 * This field is only valid when the channel type is one of the HT types.
244 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value
246 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis
247 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The
248 * may filter ARP queries targeted for other addresses than listed here.
249 * The driver must allow ARP queries targeted for all address listed here
250 * to pass through. An empty list implies no ARP queries need to pass.
251 * @arp_addr_cnt: Number of addresses currently on the list.
252 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may
253 * filter ARP queries based on the @arp_addr_list, if disabled, the
254 * hardware must not perform any ARP filtering. Note, that the filter will
255 * be enabled also in promiscuous mode.
256 * @qos: This is a QoS-enabled BSS.
257 * @idle: This interface is idle. There's also a global idle flag in the
258 * hardware config which may be more appropriate depending on what
259 * your driver/device needs to do.
260 * @ssid: The SSID of the current vif. Only valid in AP-mode.
261 * @ssid_len: Length of SSID given in @ssid.
262 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
264 struct ieee80211_bss_conf {
266 /* association related data */
267 bool assoc, ibss_joined;
269 /* erp related data */
271 bool use_short_preamble;
276 u16 assoc_capability;
279 int mcast_rate[IEEE80211_NUM_BANDS];
280 u16 ht_operation_mode;
283 enum nl80211_channel_type channel_type;
284 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN];
286 bool arp_filter_enabled;
289 u8 ssid[IEEE80211_MAX_SSID_LEN];
295 * enum mac80211_tx_control_flags - flags to describe transmission information/status
297 * These flags are used with the @flags member of &ieee80211_tx_info.
299 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
300 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
301 * number to this frame, taking care of not overwriting the fragment
302 * number and increasing the sequence number only when the
303 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
304 * assign sequence numbers to QoS-data frames but cannot do so correctly
305 * for non-QoS-data and management frames because beacons need them from
306 * that counter as well and mac80211 cannot guarantee proper sequencing.
307 * If this flag is set, the driver should instruct the hardware to
308 * assign a sequence number to the frame or assign one itself. Cf. IEEE
309 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
310 * beacons and always be clear for frames without a sequence number field.
311 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
312 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
314 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
315 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
316 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
317 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211.
318 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
319 * because the destination STA was in powersave mode. Note that to
320 * avoid race conditions, the filter must be set by the hardware or
321 * firmware upon receiving a frame that indicates that the station
322 * went to sleep (must be done on device to filter frames already on
323 * the queue) and may only be unset after mac80211 gives the OK for
324 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above),
325 * since only then is it guaranteed that no more frames are in the
327 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged
328 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
329 * is for the whole aggregation.
330 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
331 * so consider using block ack request (BAR).
332 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
333 * set by rate control algorithms to indicate probe rate, will
334 * be cleared for fragmented frames (except on the last fragment)
335 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211,
336 * used to indicate that a pending frame requires TX processing before
337 * it can be sent out.
338 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211,
339 * used to indicate that a frame was already retried due to PS
340 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211,
341 * used to indicate frame should not be encrypted
342 * @IEEE80211_TX_CTL_POLL_RESPONSE: This frame is a response to a poll
343 * frame (PS-Poll or uAPSD) and should be sent although the station
344 * is in powersave mode.
345 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the
346 * transmit function after the current frame, this can be used
347 * by drivers to kick the DMA queue only if unset or when the
349 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted
350 * after TX status because the destination was asleep, it must not
351 * be modified again (no seqno assignment, crypto, etc.)
352 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211
353 * MLME command (internal to mac80211 to figure out whether to send TX
354 * status to user space)
355 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame
356 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this
357 * frame and selects the maximum number of streams that it can use.
358 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on
359 * the off-channel channel when a remain-on-channel offload is done
360 * in hardware -- normal packets still flow and are expected to be
361 * handled properly by the device.
362 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP
363 * testing. It will be sent out with incorrect Michael MIC key to allow
364 * TKIP countermeasures to be tested.
365 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate.
366 * This flag is actually used for management frame especially for P2P
367 * frames not being sent at CCK rate in 2GHz band.
368 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period,
369 * when its status is reported the service period ends. For frames in
370 * an SP that mac80211 transmits, it is already set; for driver frames
371 * the driver may set this flag. It is also used to do the same for
373 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate.
374 * This flag is used to send nullfunc frame at minimum rate when
375 * the nullfunc is used for connection monitoring purpose.
376 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it
377 * would be fragmented by size (this is optional, only used for
378 * monitor injection).
380 * Note: If you have to add new flags to the enumeration, then don't
381 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary.
383 enum mac80211_tx_control_flags {
384 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
385 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1),
386 IEEE80211_TX_CTL_NO_ACK = BIT(2),
387 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3),
388 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4),
389 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5),
390 IEEE80211_TX_CTL_AMPDU = BIT(6),
391 IEEE80211_TX_CTL_INJECTED = BIT(7),
392 IEEE80211_TX_STAT_TX_FILTERED = BIT(8),
393 IEEE80211_TX_STAT_ACK = BIT(9),
394 IEEE80211_TX_STAT_AMPDU = BIT(10),
395 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11),
396 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12),
397 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14),
398 IEEE80211_TX_INTFL_RETRIED = BIT(15),
399 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16),
400 IEEE80211_TX_CTL_POLL_RESPONSE = BIT(17),
401 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18),
402 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19),
403 /* hole at 20, use later */
404 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21),
405 IEEE80211_TX_CTL_LDPC = BIT(22),
406 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24),
407 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25),
408 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26),
409 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27),
410 IEEE80211_TX_STATUS_EOSP = BIT(28),
411 IEEE80211_TX_CTL_USE_MINRATE = BIT(29),
412 IEEE80211_TX_CTL_DONTFRAG = BIT(30),
415 #define IEEE80211_TX_CTL_STBC_SHIFT 23
418 * This definition is used as a mask to clear all temporary flags, which are
419 * set by the tx handlers for each transmission attempt by the mac80211 stack.
421 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \
422 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \
423 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \
424 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \
425 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \
426 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_POLL_RESPONSE | \
427 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \
428 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP)
431 * enum mac80211_rate_control_flags - per-rate flags set by the
432 * Rate Control algorithm.
434 * These flags are set by the Rate control algorithm for each rate during tx,
435 * in the @flags member of struct ieee80211_tx_rate.
437 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
438 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
439 * This is set if the current BSS requires ERP protection.
440 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
441 * @IEEE80211_TX_RC_MCS: HT rate.
442 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in
444 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz.
445 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the
446 * adjacent 20 MHz channels, if the current channel type is
447 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
448 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate.
450 enum mac80211_rate_control_flags {
451 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0),
452 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1),
453 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
455 /* rate index is an MCS rate number instead of an index */
456 IEEE80211_TX_RC_MCS = BIT(3),
457 IEEE80211_TX_RC_GREEN_FIELD = BIT(4),
458 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5),
459 IEEE80211_TX_RC_DUP_DATA = BIT(6),
460 IEEE80211_TX_RC_SHORT_GI = BIT(7),
464 /* there are 40 bytes if you don't need the rateset to be kept */
465 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40
467 /* if you do need the rateset, then you have less space */
468 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24
470 /* maximum number of rate stages */
471 #define IEEE80211_TX_MAX_RATES 5
474 * struct ieee80211_tx_rate - rate selection/status
476 * @idx: rate index to attempt to send with
477 * @flags: rate control flags (&enum mac80211_rate_control_flags)
478 * @count: number of tries in this rate before going to the next rate
480 * A value of -1 for @idx indicates an invalid rate and, if used
481 * in an array of retry rates, that no more rates should be tried.
483 * When used for transmit status reporting, the driver should
484 * always report the rate along with the flags it used.
486 * &struct ieee80211_tx_info contains an array of these structs
487 * in the control information, and it will be filled by the rate
488 * control algorithm according to what should be sent. For example,
489 * if this array contains, in the format { <idx>, <count> } the
491 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 }
492 * then this means that the frame should be transmitted
493 * up to twice at rate 3, up to twice at rate 2, and up to four
494 * times at rate 1 if it doesn't get acknowledged. Say it gets
495 * acknowledged by the peer after the fifth attempt, the status
496 * information should then contain
497 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ...
498 * since it was transmitted twice at rate 3, twice at rate 2
499 * and once at rate 1 after which we received an acknowledgement.
501 struct ieee80211_tx_rate {
508 * struct ieee80211_tx_info - skb transmit information
510 * This structure is placed in skb->cb for three uses:
511 * (1) mac80211 TX control - mac80211 tells the driver what to do
512 * (2) driver internal use (if applicable)
513 * (3) TX status information - driver tells mac80211 what happened
515 * The TX control's sta pointer is only valid during the ->tx call,
518 * @flags: transmit info flags, defined above
519 * @band: the band to transmit on (use for checking for races)
520 * @antenna_sel_tx: antenna to use, 0 for automatic diversity
521 * @pad: padding, ignore
522 * @control: union for control data
523 * @status: union for status data
524 * @driver_data: array of driver_data pointers
525 * @ampdu_ack_len: number of acked aggregated frames.
526 * relevant only if IEEE80211_TX_STAT_AMPDU was set.
527 * @ampdu_len: number of aggregated frames.
528 * relevant only if IEEE80211_TX_STAT_AMPDU was set.
529 * @ack_signal: signal strength of the ACK frame
531 struct ieee80211_tx_info {
532 /* common information */
546 struct ieee80211_tx_rate rates[
547 IEEE80211_TX_MAX_RATES];
550 /* only needed before rate control */
551 unsigned long jiffies;
553 /* NB: vif can be NULL for injected frames */
554 struct ieee80211_vif *vif;
555 struct ieee80211_key_conf *hw_key;
556 struct ieee80211_sta *sta;
559 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES];
566 struct ieee80211_tx_rate driver_rates[
567 IEEE80211_TX_MAX_RATES];
568 void *rate_driver_data[
569 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)];
572 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)];
577 * struct ieee80211_sched_scan_ies - scheduled scan IEs
579 * This structure is used to pass the appropriate IEs to be used in scheduled
580 * scans for all bands. It contains both the IEs passed from the userspace
581 * and the ones generated by mac80211.
583 * @ie: array with the IEs for each supported band
584 * @len: array with the total length of the IEs for each band
586 struct ieee80211_sched_scan_ies {
587 u8 *ie[IEEE80211_NUM_BANDS];
588 size_t len[IEEE80211_NUM_BANDS];
591 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
593 return (struct ieee80211_tx_info *)skb->cb;
596 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb)
598 return (struct ieee80211_rx_status *)skb->cb;
602 * ieee80211_tx_info_clear_status - clear TX status
604 * @info: The &struct ieee80211_tx_info to be cleared.
606 * When the driver passes an skb back to mac80211, it must report
607 * a number of things in TX status. This function clears everything
608 * in the TX status but the rate control information (it does clear
609 * the count since you need to fill that in anyway).
611 * NOTE: You can only use this function if you do NOT use
612 * info->driver_data! Use info->rate_driver_data
613 * instead if you need only the less space that allows.
616 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
620 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
621 offsetof(struct ieee80211_tx_info, control.rates));
622 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
623 offsetof(struct ieee80211_tx_info, driver_rates));
624 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8);
625 /* clear the rate counts */
626 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++)
627 info->status.rates[i].count = 0;
630 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23);
631 memset(&info->status.ampdu_ack_len, 0,
632 sizeof(struct ieee80211_tx_info) -
633 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
638 * enum mac80211_rx_flags - receive flags
640 * These flags are used with the @flag member of &struct ieee80211_rx_status.
641 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
642 * Use together with %RX_FLAG_MMIC_STRIPPED.
643 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
644 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
645 * verification has been done by the hardware.
646 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
647 * If this flag is set, the stack cannot do any replay detection
648 * hence the driver or hardware will have to do that.
649 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
651 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
653 * @RX_FLAG_MACTIME_MPDU: The timestamp passed in the RX status (@mactime
654 * field) is valid and contains the time the first symbol of the MPDU
655 * was received. This is useful in monitor mode and for proper IBSS
657 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame
658 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index
659 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used
660 * @RX_FLAG_SHORT_GI: Short guard interval was used
662 enum mac80211_rx_flags {
663 RX_FLAG_MMIC_ERROR = 1<<0,
664 RX_FLAG_DECRYPTED = 1<<1,
665 RX_FLAG_MMIC_STRIPPED = 1<<3,
666 RX_FLAG_IV_STRIPPED = 1<<4,
667 RX_FLAG_FAILED_FCS_CRC = 1<<5,
668 RX_FLAG_FAILED_PLCP_CRC = 1<<6,
669 RX_FLAG_MACTIME_MPDU = 1<<7,
670 RX_FLAG_SHORTPRE = 1<<8,
672 RX_FLAG_40MHZ = 1<<10,
673 RX_FLAG_SHORT_GI = 1<<11,
677 * struct ieee80211_rx_status - receive status
679 * The low-level driver should provide this information (the subset
680 * supported by hardware) to the 802.11 code with each received
681 * frame, in the skb's control buffer (cb).
683 * @mactime: value in microseconds of the 64-bit Time Synchronization Function
684 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
685 * @band: the active band when this frame was received
686 * @freq: frequency the radio was tuned to when receiving this frame, in MHz
687 * @signal: signal strength when receiving this frame, either in dBm, in dB or
688 * unspecified depending on the hardware capabilities flags
689 * @IEEE80211_HW_SIGNAL_*
690 * @antenna: antenna used
691 * @rate_idx: index of data rate into band's supported rates or MCS index if
692 * HT rates are use (RX_FLAG_HT)
694 * @rx_flags: internal RX flags for mac80211
696 struct ieee80211_rx_status {
698 enum ieee80211_band band;
704 unsigned int rx_flags;
708 * enum ieee80211_conf_flags - configuration flags
710 * Flags to define PHY configuration options
712 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this
713 * to determine for example whether to calculate timestamps for packets
714 * or not, do not use instead of filter flags!
715 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only).
716 * This is the power save mode defined by IEEE 802.11-2007 section 11.2,
717 * meaning that the hardware still wakes up for beacons, is able to
718 * transmit frames and receive the possible acknowledgment frames.
719 * Not to be confused with hardware specific wakeup/sleep states,
720 * driver is responsible for that. See the section "Powersave support"
722 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set
723 * the driver should be prepared to handle configuration requests but
724 * may turn the device off as much as possible. Typically, this flag will
725 * be set when an interface is set UP but not associated or scanning, but
726 * it can also be unset in that case when monitor interfaces are active.
727 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main
730 enum ieee80211_conf_flags {
731 IEEE80211_CONF_MONITOR = (1<<0),
732 IEEE80211_CONF_PS = (1<<1),
733 IEEE80211_CONF_IDLE = (1<<2),
734 IEEE80211_CONF_OFFCHANNEL = (1<<3),
739 * enum ieee80211_conf_changed - denotes which configuration changed
741 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
742 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed
743 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed
744 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
745 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed
746 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
747 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed
748 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed
750 enum ieee80211_conf_changed {
751 IEEE80211_CONF_CHANGE_SMPS = BIT(1),
752 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2),
753 IEEE80211_CONF_CHANGE_MONITOR = BIT(3),
754 IEEE80211_CONF_CHANGE_PS = BIT(4),
755 IEEE80211_CONF_CHANGE_POWER = BIT(5),
756 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6),
757 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7),
758 IEEE80211_CONF_CHANGE_IDLE = BIT(8),
762 * enum ieee80211_smps_mode - spatial multiplexing power save mode
764 * @IEEE80211_SMPS_AUTOMATIC: automatic
765 * @IEEE80211_SMPS_OFF: off
766 * @IEEE80211_SMPS_STATIC: static
767 * @IEEE80211_SMPS_DYNAMIC: dynamic
768 * @IEEE80211_SMPS_NUM_MODES: internal, don't use
770 enum ieee80211_smps_mode {
771 IEEE80211_SMPS_AUTOMATIC,
773 IEEE80211_SMPS_STATIC,
774 IEEE80211_SMPS_DYNAMIC,
777 IEEE80211_SMPS_NUM_MODES,
781 * struct ieee80211_conf - configuration of the device
783 * This struct indicates how the driver shall configure the hardware.
785 * @flags: configuration flags defined above
787 * @listen_interval: listen interval in units of beacon interval
788 * @max_sleep_period: the maximum number of beacon intervals to sleep for
789 * before checking the beacon for a TIM bit (managed mode only); this
790 * value will be only achievable between DTIM frames, the hardware
791 * needs to check for the multicast traffic bit in DTIM beacons.
792 * This variable is valid only when the CONF_PS flag is set.
793 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use
794 * in power saving. Power saving will not be enabled until a beacon
795 * has been received and the DTIM period is known.
796 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the
797 * powersave documentation below. This variable is valid only when
798 * the CONF_PS flag is set.
800 * @power_level: requested transmit power (in dBm)
802 * @channel: the channel to tune to
803 * @channel_type: the channel (HT) type
805 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
806 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
807 * but actually means the number of transmissions not the number of retries
808 * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
809 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
810 * number of transmissions not the number of retries
812 * @smps_mode: spatial multiplexing powersave mode; note that
813 * %IEEE80211_SMPS_STATIC is used when the device is not
814 * configured for an HT channel
816 struct ieee80211_conf {
818 int power_level, dynamic_ps_timeout;
819 int max_sleep_period;
824 u8 long_frame_max_tx_count, short_frame_max_tx_count;
826 struct ieee80211_channel *channel;
827 enum nl80211_channel_type channel_type;
828 enum ieee80211_smps_mode smps_mode;
832 * struct ieee80211_channel_switch - holds the channel switch data
834 * The information provided in this structure is required for channel switch
837 * @timestamp: value in microseconds of the 64-bit Time Synchronization
838 * Function (TSF) timer when the frame containing the channel switch
839 * announcement was received. This is simply the rx.mactime parameter
840 * the driver passed into mac80211.
841 * @block_tx: Indicates whether transmission must be blocked before the
842 * scheduled channel switch, as indicated by the AP.
843 * @channel: the new channel to switch to
844 * @count: the number of TBTT's until the channel switch event
846 struct ieee80211_channel_switch {
849 struct ieee80211_channel *channel;
854 * struct ieee80211_vif - per-interface data
856 * Data in this structure is continually present for driver
857 * use during the life of a virtual interface.
859 * @type: type of this virtual interface
860 * @bss_conf: BSS configuration for this interface, either our own
861 * or the BSS we're associated to
862 * @addr: address of this interface
863 * @p2p: indicates whether this AP or STA interface is a p2p
864 * interface, i.e. a GO or p2p-sta respectively
865 * @drv_priv: data area for driver use, will always be aligned to
868 struct ieee80211_vif {
869 enum nl80211_iftype type;
870 struct ieee80211_bss_conf bss_conf;
874 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
877 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
879 #ifdef CONFIG_MAC80211_MESH
880 return vif->type == NL80211_IFTYPE_MESH_POINT;
886 * enum ieee80211_key_flags - key flags
888 * These flags are used for communication about keys between the driver
889 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
891 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
892 * that the STA this key will be used with could be using QoS.
893 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
894 * driver to indicate that it requires IV generation for this
896 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
897 * the driver for a TKIP key if it requires Michael MIC
898 * generation in software.
899 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
900 * that the key is pairwise rather then a shared key.
901 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a
902 * CCMP key if it requires CCMP encryption of management frames (MFP) to
903 * be done in software.
905 enum ieee80211_key_flags {
906 IEEE80211_KEY_FLAG_WMM_STA = 1<<0,
907 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1,
908 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
909 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3,
910 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4,
914 * struct ieee80211_key_conf - key information
916 * This key information is given by mac80211 to the driver by
917 * the set_key() callback in &struct ieee80211_ops.
919 * @hw_key_idx: To be set by the driver, this is the key index the driver
920 * wants to be given when a frame is transmitted and needs to be
921 * encrypted in hardware.
922 * @cipher: The key's cipher suite selector.
923 * @flags: key flags, see &enum ieee80211_key_flags.
924 * @keyidx: the key index (0-3)
925 * @keylen: key material length
926 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte)
928 * - Temporal Encryption Key (128 bits)
929 * - Temporal Authenticator Tx MIC Key (64 bits)
930 * - Temporal Authenticator Rx MIC Key (64 bits)
931 * @icv_len: The ICV length for this key type
932 * @iv_len: The IV length for this key type
934 struct ieee80211_key_conf {
946 * enum set_key_cmd - key command
948 * Used with the set_key() callback in &struct ieee80211_ops, this
949 * indicates whether a key is being removed or added.
951 * @SET_KEY: a key is set
952 * @DISABLE_KEY: a key must be disabled
955 SET_KEY, DISABLE_KEY,
959 * struct ieee80211_sta - station table entry
961 * A station table entry represents a station we are possibly
962 * communicating with. Since stations are RCU-managed in
963 * mac80211, any ieee80211_sta pointer you get access to must
964 * either be protected by rcu_read_lock() explicitly or implicitly,
965 * or you must take good care to not use such a pointer after a
966 * call to your sta_remove callback that removed it.
969 * @aid: AID we assigned to the station if we're an AP
970 * @supp_rates: Bitmap of supported rates (per band)
971 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities
972 * @wme: indicates whether the STA supports WME. Only valid during AP-mode.
973 * @drv_priv: data area for driver use, will always be aligned to
974 * sizeof(void *), size is determined in hw information.
975 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid
976 * if wme is supported.
977 * @max_sp: max Service Period. Only valid if wme is supported.
979 struct ieee80211_sta {
980 u32 supp_rates[IEEE80211_NUM_BANDS];
983 struct ieee80211_sta_ht_cap ht_cap;
989 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
993 * enum sta_notify_cmd - sta notify command
995 * Used with the sta_notify() callback in &struct ieee80211_ops, this
996 * indicates if an associated station made a power state transition.
998 * @STA_NOTIFY_SLEEP: a station is now sleeping
999 * @STA_NOTIFY_AWAKE: a sleeping station woke up
1001 enum sta_notify_cmd {
1002 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE,
1006 * enum ieee80211_hw_flags - hardware flags
1008 * These flags are used to indicate hardware capabilities to
1009 * the stack. Generally, flags here should have their meaning
1010 * done in a way that the simplest hardware doesn't need setting
1011 * any particular flags. There are some exceptions to this rule,
1012 * however, so you are advised to review these flags carefully.
1014 * @IEEE80211_HW_HAS_RATE_CONTROL:
1015 * The hardware or firmware includes rate control, and cannot be
1016 * controlled by the stack. As such, no rate control algorithm
1017 * should be instantiated, and the TX rate reported to userspace
1018 * will be taken from the TX status instead of the rate control
1020 * Note that this requires that the driver implement a number of
1021 * callbacks so it has the correct information, it needs to have
1022 * the @set_rts_threshold callback and must look at the BSS config
1023 * @use_cts_prot for G/N protection, @use_short_slot for slot
1024 * timing in 2.4 GHz and @use_short_preamble for preambles for
1027 * @IEEE80211_HW_RX_INCLUDES_FCS:
1028 * Indicates that received frames passed to the stack include
1029 * the FCS at the end.
1031 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
1032 * Some wireless LAN chipsets buffer broadcast/multicast frames
1033 * for power saving stations in the hardware/firmware and others
1034 * rely on the host system for such buffering. This option is used
1035 * to configure the IEEE 802.11 upper layer to buffer broadcast and
1036 * multicast frames when there are power saving stations so that
1037 * the driver can fetch them with ieee80211_get_buffered_bc().
1039 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE:
1040 * Hardware is not capable of short slot operation on the 2.4 GHz band.
1042 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE:
1043 * Hardware is not capable of receiving frames with short preamble on
1046 * @IEEE80211_HW_SIGNAL_UNSPEC:
1047 * Hardware can provide signal values but we don't know its units. We
1048 * expect values between 0 and @max_signal.
1049 * If possible please provide dB or dBm instead.
1051 * @IEEE80211_HW_SIGNAL_DBM:
1052 * Hardware gives signal values in dBm, decibel difference from
1053 * one milliwatt. This is the preferred method since it is standardized
1054 * between different devices. @max_signal does not need to be set.
1056 * @IEEE80211_HW_SPECTRUM_MGMT:
1057 * Hardware supports spectrum management defined in 802.11h
1058 * Measurement, Channel Switch, Quieting, TPC
1060 * @IEEE80211_HW_AMPDU_AGGREGATION:
1061 * Hardware supports 11n A-MPDU aggregation.
1063 * @IEEE80211_HW_SUPPORTS_PS:
1064 * Hardware has power save support (i.e. can go to sleep).
1066 * @IEEE80211_HW_PS_NULLFUNC_STACK:
1067 * Hardware requires nullfunc frame handling in stack, implies
1068 * stack support for dynamic PS.
1070 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS:
1071 * Hardware has support for dynamic PS.
1073 * @IEEE80211_HW_MFP_CAPABLE:
1074 * Hardware supports management frame protection (MFP, IEEE 802.11w).
1076 * @IEEE80211_HW_BEACON_FILTER:
1077 * Hardware supports dropping of irrelevant beacon frames to
1078 * avoid waking up cpu.
1080 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS:
1081 * Hardware supports static spatial multiplexing powersave,
1082 * ie. can turn off all but one chain even on HT connections
1083 * that should be using more chains.
1085 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS:
1086 * Hardware supports dynamic spatial multiplexing powersave,
1087 * ie. can turn off all but one chain and then wake the rest
1088 * up as required after, for example, rts/cts handshake.
1090 * @IEEE80211_HW_SUPPORTS_UAPSD:
1091 * Hardware supports Unscheduled Automatic Power Save Delivery
1092 * (U-APSD) in managed mode. The mode is configured with
1093 * conf_tx() operation.
1095 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS:
1096 * Hardware can provide ack status reports of Tx frames to
1099 * @IEEE80211_HW_CONNECTION_MONITOR:
1100 * The hardware performs its own connection monitoring, including
1101 * periodic keep-alives to the AP and probing the AP on beacon loss.
1102 * When this flag is set, signaling beacon-loss will cause an immediate
1103 * change to disassociated state.
1105 * @IEEE80211_HW_SUPPORTS_CQM_RSSI:
1106 * Hardware can do connection quality monitoring - i.e. it can monitor
1107 * connection quality related parameters, such as the RSSI level and
1108 * provide notifications if configured trigger levels are reached.
1110 * @IEEE80211_HW_NEED_DTIM_PERIOD:
1111 * This device needs to know the DTIM period for the BSS before
1114 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports
1115 * per-station GTKs as used by IBSS RSN or during fast transition. If
1116 * the device doesn't support per-station GTKs, but can be asked not
1117 * to decrypt group addressed frames, then IBSS RSN support is still
1118 * possible but software crypto will be used. Advertise the wiphy flag
1119 * only in that case.
1121 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device
1122 * autonomously manages the PS status of connected stations. When
1123 * this flag is set mac80211 will not trigger PS mode for connected
1124 * stations based on the PM bit of incoming frames.
1125 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure
1126 * the PS mode of connected stations.
1128 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session
1129 * setup strictly in HW. mac80211 should not attempt to do this in
1132 * @IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL: On this hardware TX BA session
1133 * should be tear down once BAR frame will not be acked.
1136 enum ieee80211_hw_flags {
1137 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0,
1138 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
1139 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
1140 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3,
1141 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4,
1142 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5,
1143 IEEE80211_HW_SIGNAL_DBM = 1<<6,
1144 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7,
1145 IEEE80211_HW_SPECTRUM_MGMT = 1<<8,
1146 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9,
1147 IEEE80211_HW_SUPPORTS_PS = 1<<10,
1148 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11,
1149 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12,
1150 IEEE80211_HW_MFP_CAPABLE = 1<<13,
1151 IEEE80211_HW_BEACON_FILTER = 1<<14,
1152 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15,
1153 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16,
1154 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17,
1155 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18,
1156 IEEE80211_HW_CONNECTION_MONITOR = 1<<19,
1157 IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20,
1158 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21,
1159 IEEE80211_HW_AP_LINK_PS = 1<<22,
1160 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23,
1161 IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL = 1<<26,
1165 * struct ieee80211_hw - hardware information and state
1167 * This structure contains the configuration and hardware
1168 * information for an 802.11 PHY.
1170 * @wiphy: This points to the &struct wiphy allocated for this
1171 * 802.11 PHY. You must fill in the @perm_addr and @dev
1172 * members of this structure using SET_IEEE80211_DEV()
1173 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported
1174 * bands (with channels, bitrates) are registered here.
1176 * @conf: &struct ieee80211_conf, device configuration, don't use.
1178 * @priv: pointer to private area that was allocated for driver use
1179 * along with this structure.
1181 * @flags: hardware flags, see &enum ieee80211_hw_flags.
1183 * @extra_tx_headroom: headroom to reserve in each transmit skb
1184 * for use by the driver (e.g. for transmit headers.)
1186 * @channel_change_time: time (in microseconds) it takes to change channels.
1188 * @max_signal: Maximum value for signal (rssi) in RX information, used
1189 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB
1191 * @max_listen_interval: max listen interval in units of beacon interval
1194 * @queues: number of available hardware transmit queues for
1195 * data packets. WMM/QoS requires at least four, these
1196 * queues need to have configurable access parameters.
1198 * @rate_control_algorithm: rate control algorithm for this hardware.
1199 * If unset (NULL), the default algorithm will be used. Must be
1200 * set before calling ieee80211_register_hw().
1202 * @vif_data_size: size (in bytes) of the drv_priv data area
1203 * within &struct ieee80211_vif.
1204 * @sta_data_size: size (in bytes) of the drv_priv data area
1205 * within &struct ieee80211_sta.
1207 * @max_rates: maximum number of alternate rate retry stages the hw
1209 * @max_report_rates: maximum number of alternate rate retry stages
1210 * the hw can report back.
1211 * @max_rate_tries: maximum number of tries for each stage
1213 * @napi_weight: weight used for NAPI polling. You must specify an
1214 * appropriate value here if a napi_poll operation is provided
1217 * @max_rx_aggregation_subframes: maximum buffer size (number of
1218 * sub-frames) to be used for A-MPDU block ack receiver
1220 * This is only relevant if the device has restrictions on the
1221 * number of subframes, if it relies on mac80211 to do reordering
1222 * it shouldn't be set.
1224 * @max_tx_aggregation_subframes: maximum number of subframes in an
1225 * aggregate an HT driver will transmit, used by the peer as a
1226 * hint to size its reorder buffer.
1228 struct ieee80211_hw {
1229 struct ieee80211_conf conf;
1230 struct wiphy *wiphy;
1231 const char *rate_control_algorithm;
1234 unsigned int extra_tx_headroom;
1235 int channel_change_time;
1240 u16 max_listen_interval;
1243 u8 max_report_rates;
1245 u8 max_rx_aggregation_subframes;
1246 u8 max_tx_aggregation_subframes;
1250 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy
1252 * @wiphy: the &struct wiphy which we want to query
1254 * mac80211 drivers can use this to get to their respective
1255 * &struct ieee80211_hw. Drivers wishing to get to their own private
1256 * structure can then access it via hw->priv. Note that mac802111 drivers should
1257 * not use wiphy_priv() to try to get their private driver structure as this
1258 * is already used internally by mac80211.
1260 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy);
1263 * SET_IEEE80211_DEV - set device for 802.11 hardware
1265 * @hw: the &struct ieee80211_hw to set the device for
1266 * @dev: the &struct device of this 802.11 device
1268 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
1270 set_wiphy_dev(hw->wiphy, dev);
1274 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware
1276 * @hw: the &struct ieee80211_hw to set the MAC address for
1277 * @addr: the address to set
1279 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
1281 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
1284 static inline struct ieee80211_rate *
1285 ieee80211_get_tx_rate(const struct ieee80211_hw *hw,
1286 const struct ieee80211_tx_info *c)
1288 if (WARN_ON(c->control.rates[0].idx < 0))
1290 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx];
1293 static inline struct ieee80211_rate *
1294 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
1295 const struct ieee80211_tx_info *c)
1297 if (c->control.rts_cts_rate_idx < 0)
1299 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx];
1302 static inline struct ieee80211_rate *
1303 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
1304 const struct ieee80211_tx_info *c, int idx)
1306 if (c->control.rates[idx + 1].idx < 0)
1308 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx];
1312 * DOC: Hardware crypto acceleration
1314 * mac80211 is capable of taking advantage of many hardware
1315 * acceleration designs for encryption and decryption operations.
1317 * The set_key() callback in the &struct ieee80211_ops for a given
1318 * device is called to enable hardware acceleration of encryption and
1319 * decryption. The callback takes a @sta parameter that will be NULL
1320 * for default keys or keys used for transmission only, or point to
1321 * the station information for the peer for individual keys.
1322 * Multiple transmission keys with the same key index may be used when
1323 * VLANs are configured for an access point.
1325 * When transmitting, the TX control data will use the @hw_key_idx
1326 * selected by the driver by modifying the &struct ieee80211_key_conf
1327 * pointed to by the @key parameter to the set_key() function.
1329 * The set_key() call for the %SET_KEY command should return 0 if
1330 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
1331 * added; if you return 0 then hw_key_idx must be assigned to the
1332 * hardware key index, you are free to use the full u8 range.
1334 * When the cmd is %DISABLE_KEY then it must succeed.
1336 * Note that it is permissible to not decrypt a frame even if a key
1337 * for it has been uploaded to hardware, the stack will not make any
1338 * decision based on whether a key has been uploaded or not but rather
1339 * based on the receive flags.
1341 * The &struct ieee80211_key_conf structure pointed to by the @key
1342 * parameter is guaranteed to be valid until another call to set_key()
1343 * removes it, but it can only be used as a cookie to differentiate
1346 * In TKIP some HW need to be provided a phase 1 key, for RX decryption
1347 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key
1349 * The update_tkip_key() call updates the driver with the new phase 1 key.
1350 * This happens every time the iv16 wraps around (every 65536 packets). The
1351 * set_key() call will happen only once for each key (unless the AP did
1352 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is
1353 * provided by update_tkip_key only. The trigger that makes mac80211 call this
1354 * handler is software decryption with wrap around of iv16.
1358 * DOC: Powersave support
1360 * mac80211 has support for various powersave implementations.
1362 * First, it can support hardware that handles all powersaving by itself,
1363 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware
1364 * flag. In that case, it will be told about the desired powersave mode
1365 * with the %IEEE80211_CONF_PS flag depending on the association status.
1366 * The hardware must take care of sending nullfunc frames when necessary,
1367 * i.e. when entering and leaving powersave mode. The hardware is required
1368 * to look at the AID in beacons and signal to the AP that it woke up when
1369 * it finds traffic directed to it.
1371 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in
1372 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused
1373 * with hardware wakeup and sleep states. Driver is responsible for waking
1374 * up the hardware before issuing commands to the hardware and putting it
1375 * back to sleep at appropriate times.
1377 * When PS is enabled, hardware needs to wakeup for beacons and receive the
1378 * buffered multicast/broadcast frames after the beacon. Also it must be
1379 * possible to send frames and receive the acknowledment frame.
1381 * Other hardware designs cannot send nullfunc frames by themselves and also
1382 * need software support for parsing the TIM bitmap. This is also supported
1383 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and
1384 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still
1385 * required to pass up beacons. The hardware is still required to handle
1386 * waking up for multicast traffic; if it cannot the driver must handle that
1387 * as best as it can, mac80211 is too slow to do that.
1389 * Dynamic powersave is an extension to normal powersave in which the
1390 * hardware stays awake for a user-specified period of time after sending a
1391 * frame so that reply frames need not be buffered and therefore delayed to
1392 * the next wakeup. It's compromise of getting good enough latency when
1393 * there's data traffic and still saving significantly power in idle
1396 * Dynamic powersave is simply supported by mac80211 enabling and disabling
1397 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS
1398 * flag and mac80211 will handle everything automatically. Additionally,
1399 * hardware having support for the dynamic PS feature may set the
1400 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support
1401 * dynamic PS mode itself. The driver needs to look at the
1402 * @dynamic_ps_timeout hardware configuration value and use it that value
1403 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable
1404 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS
1405 * enabled whenever user has enabled powersave.
1407 * Some hardware need to toggle a single shared antenna between WLAN and
1408 * Bluetooth to facilitate co-existence. These types of hardware set
1409 * limitations on the use of host controlled dynamic powersave whenever there
1410 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the
1411 * driver may request temporarily going into full power save, in order to
1412 * enable toggling the antenna between BT and WLAN. If the driver requests
1413 * disabling dynamic powersave, the @dynamic_ps_timeout value will be
1414 * temporarily set to zero until the driver re-enables dynamic powersave.
1416 * Driver informs U-APSD client support by enabling
1417 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the
1418 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS
1419 * Nullfunc frames and stay awake until the service period has ended. To
1420 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames
1421 * from that AC are transmitted with powersave enabled.
1423 * Note: U-APSD client mode is not yet supported with
1424 * %IEEE80211_HW_PS_NULLFUNC_STACK.
1428 * DOC: Beacon filter support
1430 * Some hardware have beacon filter support to reduce host cpu wakeups
1431 * which will reduce system power consumption. It usuallly works so that
1432 * the firmware creates a checksum of the beacon but omits all constantly
1433 * changing elements (TSF, TIM etc). Whenever the checksum changes the
1434 * beacon is forwarded to the host, otherwise it will be just dropped. That
1435 * way the host will only receive beacons where some relevant information
1436 * (for example ERP protection or WMM settings) have changed.
1438 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER
1439 * hardware capability. The driver needs to enable beacon filter support
1440 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When
1441 * power save is enabled, the stack will not check for beacon loss and the
1442 * driver needs to notify about loss of beacons with ieee80211_beacon_loss().
1444 * The time (or number of beacons missed) until the firmware notifies the
1445 * driver of a beacon loss event (which in turn causes the driver to call
1446 * ieee80211_beacon_loss()) should be configurable and will be controlled
1447 * by mac80211 and the roaming algorithm in the future.
1449 * Since there may be constantly changing information elements that nothing
1450 * in the software stack cares about, we will, in the future, have mac80211
1451 * tell the driver which information elements are interesting in the sense
1452 * that we want to see changes in them. This will include
1453 * - a list of information element IDs
1454 * - a list of OUIs for the vendor information element
1456 * Ideally, the hardware would filter out any beacons without changes in the
1457 * requested elements, but if it cannot support that it may, at the expense
1458 * of some efficiency, filter out only a subset. For example, if the device
1459 * doesn't support checking for OUIs it should pass up all changes in all
1460 * vendor information elements.
1462 * Note that change, for the sake of simplification, also includes information
1463 * elements appearing or disappearing from the beacon.
1465 * Some hardware supports an "ignore list" instead, just make sure nothing
1466 * that was requested is on the ignore list, and include commonly changing
1467 * information element IDs in the ignore list, for example 11 (BSS load) and
1468 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136,
1469 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility
1470 * it could also include some currently unused IDs.
1473 * In addition to these capabilities, hardware should support notifying the
1474 * host of changes in the beacon RSSI. This is relevant to implement roaming
1475 * when no traffic is flowing (when traffic is flowing we see the RSSI of
1476 * the received data packets). This can consist in notifying the host when
1477 * the RSSI changes significantly or when it drops below or rises above
1478 * configurable thresholds. In the future these thresholds will also be
1479 * configured by mac80211 (which gets them from userspace) to implement
1480 * them as the roaming algorithm requires.
1482 * If the hardware cannot implement this, the driver should ask it to
1483 * periodically pass beacon frames to the host so that software can do the
1484 * signal strength threshold checking.
1488 * DOC: Spatial multiplexing power save
1490 * SMPS (Spatial multiplexing power save) is a mechanism to conserve
1491 * power in an 802.11n implementation. For details on the mechanism
1492 * and rationale, please refer to 802.11 (as amended by 802.11n-2009)
1493 * "11.2.3 SM power save".
1495 * The mac80211 implementation is capable of sending action frames
1496 * to update the AP about the station's SMPS mode, and will instruct
1497 * the driver to enter the specific mode. It will also announce the
1498 * requested SMPS mode during the association handshake. Hardware
1499 * support for this feature is required, and can be indicated by
1502 * The default mode will be "automatic", which nl80211/cfg80211
1503 * defines to be dynamic SMPS in (regular) powersave, and SMPS
1504 * turned off otherwise.
1506 * To support this feature, the driver must set the appropriate
1507 * hardware support flags, and handle the SMPS flag to the config()
1508 * operation. It will then with this mechanism be instructed to
1509 * enter the requested SMPS mode while associated to an HT AP.
1513 * DOC: Frame filtering
1515 * mac80211 requires to see many management frames for proper
1516 * operation, and users may want to see many more frames when
1517 * in monitor mode. However, for best CPU usage and power consumption,
1518 * having as few frames as possible percolate through the stack is
1519 * desirable. Hence, the hardware should filter as much as possible.
1521 * To achieve this, mac80211 uses filter flags (see below) to tell
1522 * the driver's configure_filter() function which frames should be
1523 * passed to mac80211 and which should be filtered out.
1525 * Before configure_filter() is invoked, the prepare_multicast()
1526 * callback is invoked with the parameters @mc_count and @mc_list
1527 * for the combined multicast address list of all virtual interfaces.
1528 * It's use is optional, and it returns a u64 that is passed to
1529 * configure_filter(). Additionally, configure_filter() has the
1530 * arguments @changed_flags telling which flags were changed and
1531 * @total_flags with the new flag states.
1533 * If your device has no multicast address filters your driver will
1534 * need to check both the %FIF_ALLMULTI flag and the @mc_count
1535 * parameter to see whether multicast frames should be accepted
1538 * All unsupported flags in @total_flags must be cleared.
1539 * Hardware does not support a flag if it is incapable of _passing_
1540 * the frame to the stack. Otherwise the driver must ignore
1541 * the flag, but not clear it.
1542 * You must _only_ clear the flag (announce no support for the
1543 * flag to mac80211) if you are not able to pass the packet type
1544 * to the stack (so the hardware always filters it).
1545 * So for example, you should clear @FIF_CONTROL, if your hardware
1546 * always filters control frames. If your hardware always passes
1547 * control frames to the kernel and is incapable of filtering them,
1548 * you do _not_ clear the @FIF_CONTROL flag.
1549 * This rule applies to all other FIF flags as well.
1553 * DOC: AP support for powersaving clients
1555 * In order to implement AP and P2P GO modes, mac80211 has support for
1556 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD.
1557 * There currently is no support for sAPSD.
1559 * There is one assumption that mac80211 makes, namely that a client
1560 * will not poll with PS-Poll and trigger with uAPSD at the same time.
1561 * Both are supported, and both can be used by the same client, but
1562 * they can't be used concurrently by the same client. This simplifies
1565 * The first thing to keep in mind is that there is a flag for complete
1566 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set,
1567 * mac80211 expects the driver to handle most of the state machine for
1568 * powersaving clients and will ignore the PM bit in incoming frames.
1569 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of
1570 * stations' powersave transitions. In this mode, mac80211 also doesn't
1571 * handle PS-Poll/uAPSD.
1573 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the
1574 * PM bit in incoming frames for client powersave transitions. When a
1575 * station goes to sleep, we will stop transmitting to it. There is,
1576 * however, a race condition: a station might go to sleep while there is
1577 * data buffered on hardware queues. If the device has support for this
1578 * it will reject frames, and the driver should give the frames back to
1579 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will
1580 * cause mac80211 to retry the frame when the station wakes up. The
1581 * driver is also notified of powersave transitions by calling its
1582 * @sta_notify callback.
1584 * When the station is asleep, it has three choices: it can wake up,
1585 * it can PS-Poll, or it can possibly start a uAPSD service period.
1586 * Waking up is implemented by simply transmitting all buffered (and
1587 * filtered) frames to the station. This is the easiest case. When
1588 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211
1589 * will inform the driver of this with the @allow_buffered_frames
1590 * callback; this callback is optional. mac80211 will then transmit
1591 * the frames as usual and set the %IEEE80211_TX_CTL_POLL_RESPONSE
1592 * on each frame. The last frame in the service period (or the only
1593 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to
1594 * indicate that it ends the service period; as this frame must have
1595 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS.
1596 * When TX status is reported for this frame, the service period is
1597 * marked has having ended and a new one can be started by the peer.
1599 * Another race condition can happen on some devices like iwlwifi
1600 * when there are frames queued for the station and it wakes up
1601 * or polls; the frames that are already queued could end up being
1602 * transmitted first instead, causing reordering and/or wrong
1603 * processing of the EOSP. The cause is that allowing frames to be
1604 * transmitted to a certain station is out-of-band communication to
1605 * the device. To allow this problem to be solved, the driver can
1606 * call ieee80211_sta_block_awake() if frames are buffered when it
1607 * is notified that the station went to sleep. When all these frames
1608 * have been filtered (see above), it must call the function again
1609 * to indicate that the station is no longer blocked.
1611 * If the driver buffers frames in the driver for aggregation in any
1612 * way, it must use the ieee80211_sta_set_buffered() call when it is
1613 * notified of the station going to sleep to inform mac80211 of any
1614 * TIDs that have frames buffered. Note that when a station wakes up
1615 * this information is reset (hence the requirement to call it when
1616 * informed of the station going to sleep). Then, when a service
1617 * period starts for any reason, @release_buffered_frames is called
1618 * with the number of frames to be released and which TIDs they are
1619 * to come from. In this case, the driver is responsible for setting
1620 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames,
1621 * to help the @more_data paramter is passed to tell the driver if
1622 * there is more data on other TIDs -- the TIDs to release frames
1623 * from are ignored since mac80211 doesn't know how many frames the
1624 * buffers for those TIDs contain.
1626 * If the driver also implement GO mode, where absence periods may
1627 * shorten service periods (or abort PS-Poll responses), it must
1628 * filter those response frames except in the case of frames that
1629 * are buffered in the driver -- those must remain buffered to avoid
1630 * reordering. Because it is possible that no frames are released
1631 * in this case, the driver must call ieee80211_sta_eosp_irqsafe()
1632 * to indicate to mac80211 that the service period ended anyway.
1634 * Finally, if frames from multiple TIDs are released from mac80211
1635 * but the driver might reorder them, it must clear & set the flags
1636 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP)
1637 * and also take care of the EOSP and MORE_DATA bits in the frame.
1638 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case.
1642 * enum ieee80211_filter_flags - hardware filter flags
1644 * These flags determine what the filter in hardware should be
1645 * programmed to let through and what should not be passed to the
1646 * stack. It is always safe to pass more frames than requested,
1647 * but this has negative impact on power consumption.
1649 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
1650 * think of the BSS as your network segment and then this corresponds
1651 * to the regular ethernet device promiscuous mode.
1653 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested
1654 * by the user or if the hardware is not capable of filtering by
1655 * multicast address.
1657 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
1658 * %RX_FLAG_FAILED_FCS_CRC for them)
1660 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
1661 * the %RX_FLAG_FAILED_PLCP_CRC for them
1663 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
1664 * to the hardware that it should not filter beacons or probe responses
1665 * by BSSID. Filtering them can greatly reduce the amount of processing
1666 * mac80211 needs to do and the amount of CPU wakeups, so you should
1667 * honour this flag if possible.
1669 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS
1670 * is not set then only those addressed to this station.
1672 * @FIF_OTHER_BSS: pass frames destined to other BSSes
1674 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only
1675 * those addressed to this station.
1677 * @FIF_PROBE_REQ: pass probe request frames
1679 enum ieee80211_filter_flags {
1680 FIF_PROMISC_IN_BSS = 1<<0,
1681 FIF_ALLMULTI = 1<<1,
1683 FIF_PLCPFAIL = 1<<3,
1684 FIF_BCN_PRBRESP_PROMISC = 1<<4,
1686 FIF_OTHER_BSS = 1<<6,
1688 FIF_PROBE_REQ = 1<<8,
1692 * enum ieee80211_ampdu_mlme_action - A-MPDU actions
1694 * These flags are used with the ampdu_action() callback in
1695 * &struct ieee80211_ops to indicate which action is needed.
1697 * Note that drivers MUST be able to deal with a TX aggregation
1698 * session being stopped even before they OK'ed starting it by
1699 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer
1700 * might receive the addBA frame and send a delBA right away!
1702 * @IEEE80211_AMPDU_RX_START: start Rx aggregation
1703 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
1704 * @IEEE80211_AMPDU_TX_START: start Tx aggregation
1705 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation
1706 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational
1708 enum ieee80211_ampdu_mlme_action {
1709 IEEE80211_AMPDU_RX_START,
1710 IEEE80211_AMPDU_RX_STOP,
1711 IEEE80211_AMPDU_TX_START,
1712 IEEE80211_AMPDU_TX_STOP,
1713 IEEE80211_AMPDU_TX_OPERATIONAL,
1717 * enum ieee80211_tx_sync_type - TX sync type
1718 * @IEEE80211_TX_SYNC_AUTH: sync TX for authentication
1719 * (and possibly also before direct probe)
1720 * @IEEE80211_TX_SYNC_ASSOC: sync TX for association
1721 * @IEEE80211_TX_SYNC_ACTION: sync TX for action frame
1722 * (not implemented yet)
1724 enum ieee80211_tx_sync_type {
1725 IEEE80211_TX_SYNC_AUTH,
1726 IEEE80211_TX_SYNC_ASSOC,
1727 IEEE80211_TX_SYNC_ACTION,
1731 * enum ieee80211_frame_release_type - frame release reason
1732 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll
1733 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to
1734 * frame received on trigger-enabled AC
1736 enum ieee80211_frame_release_type {
1737 IEEE80211_FRAME_RELEASE_PSPOLL,
1738 IEEE80211_FRAME_RELEASE_UAPSD,
1742 * struct ieee80211_ops - callbacks from mac80211 to the driver
1744 * This structure contains various callbacks that the driver may
1745 * handle or, in some cases, must handle, for example to configure
1746 * the hardware to a new channel or to transmit a frame.
1748 * @tx: Handler that 802.11 module calls for each transmitted frame.
1749 * skb contains the buffer starting from the IEEE 802.11 header.
1750 * The low-level driver should send the frame out based on
1751 * configuration in the TX control data. This handler should,
1752 * preferably, never fail and stop queues appropriately, more
1753 * importantly, however, it must never fail for A-MPDU-queues.
1754 * This function should return NETDEV_TX_OK except in very
1756 * Must be implemented and atomic.
1758 * @start: Called before the first netdevice attached to the hardware
1759 * is enabled. This should turn on the hardware and must turn on
1760 * frame reception (for possibly enabled monitor interfaces.)
1761 * Returns negative error codes, these may be seen in userspace,
1763 * When the device is started it should not have a MAC address
1764 * to avoid acknowledging frames before a non-monitor device
1766 * Must be implemented and can sleep.
1768 * @stop: Called after last netdevice attached to the hardware
1769 * is disabled. This should turn off the hardware (at least
1770 * it must turn off frame reception.)
1771 * May be called right after add_interface if that rejects
1772 * an interface. If you added any work onto the mac80211 workqueue
1773 * you should ensure to cancel it on this callback.
1774 * Must be implemented and can sleep.
1776 * @suspend: Suspend the device; mac80211 itself will quiesce before and
1777 * stop transmitting and doing any other configuration, and then
1778 * ask the device to suspend. This is only invoked when WoWLAN is
1779 * configured, otherwise the device is deconfigured completely and
1780 * reconfigured at resume time.
1781 * The driver may also impose special conditions under which it
1782 * wants to use the "normal" suspend (deconfigure), say if it only
1783 * supports WoWLAN when the device is associated. In this case, it
1784 * must return 1 from this function.
1786 * @resume: If WoWLAN was configured, this indicates that mac80211 is
1787 * now resuming its operation, after this the device must be fully
1788 * functional again. If this returns an error, the only way out is
1789 * to also unregister the device. If it returns 1, then mac80211
1790 * will also go through the regular complete restart on resume.
1792 * @add_interface: Called when a netdevice attached to the hardware is
1793 * enabled. Because it is not called for monitor mode devices, @start
1794 * and @stop must be implemented.
1795 * The driver should perform any initialization it needs before
1796 * the device can be enabled. The initial configuration for the
1797 * interface is given in the conf parameter.
1798 * The callback may refuse to add an interface by returning a
1799 * negative error code (which will be seen in userspace.)
1800 * Must be implemented and can sleep.
1802 * @change_interface: Called when a netdevice changes type. This callback
1803 * is optional, but only if it is supported can interface types be
1804 * switched while the interface is UP. The callback may sleep.
1805 * Note that while an interface is being switched, it will not be
1806 * found by the interface iteration callbacks.
1808 * @remove_interface: Notifies a driver that an interface is going down.
1809 * The @stop callback is called after this if it is the last interface
1810 * and no monitor interfaces are present.
1811 * When all interfaces are removed, the MAC address in the hardware
1812 * must be cleared so the device no longer acknowledges packets,
1813 * the mac_addr member of the conf structure is, however, set to the
1814 * MAC address of the device going away.
1815 * Hence, this callback must be implemented. It can sleep.
1817 * @config: Handler for configuration requests. IEEE 802.11 code calls this
1818 * function to change hardware configuration, e.g., channel.
1819 * This function should never fail but returns a negative error code
1820 * if it does. The callback can sleep.
1822 * @bss_info_changed: Handler for configuration requests related to BSS
1823 * parameters that may vary during BSS's lifespan, and may affect low
1824 * level driver (e.g. assoc/disassoc status, erp parameters).
1825 * This function should not be used if no BSS has been set, unless
1826 * for association indication. The @changed parameter indicates which
1827 * of the bss parameters has changed when a call is made. The callback
1830 * @tx_sync: Called before a frame is sent to an AP/GO. In the GO case, the
1831 * driver should sync with the GO's powersaving so the device doesn't
1832 * transmit the frame while the GO is asleep. In the regular AP case
1833 * it may be used by drivers for devices implementing other restrictions
1834 * on talking to APs, e.g. due to regulatory enforcement or just HW
1836 * This function is called for every authentication, association and
1837 * action frame separately since applications might attempt to auth
1838 * with multiple APs before chosing one to associate to. If it returns
1839 * an error, the corresponding authentication, association or frame
1840 * transmission is aborted and reported as having failed. It is always
1841 * called after tuning to the correct channel.
1842 * The callback might be called multiple times before @finish_tx_sync
1843 * (but @finish_tx_sync will be called once for each) but in practice
1844 * this is unlikely to happen. It can also refuse in that case if the
1845 * driver cannot handle that situation.
1846 * This callback can sleep.
1847 * @finish_tx_sync: Called as a counterpart to @tx_sync, unless that returned
1848 * an error. This callback can sleep.
1850 * @prepare_multicast: Prepare for multicast filter configuration.
1851 * This callback is optional, and its return value is passed
1852 * to configure_filter(). This callback must be atomic.
1854 * @configure_filter: Configure the device's RX filter.
1855 * See the section "Frame filtering" for more information.
1856 * This callback must be implemented and can sleep.
1858 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
1859 * must be set or cleared for a given STA. Must be atomic.
1861 * @set_key: See the section "Hardware crypto acceleration"
1862 * This callback is only called between add_interface and
1863 * remove_interface calls, i.e. while the given virtual interface
1865 * Returns a negative error code if the key can't be added.
1866 * The callback can sleep.
1868 * @update_tkip_key: See the section "Hardware crypto acceleration"
1869 * This callback will be called in the context of Rx. Called for drivers
1870 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
1871 * The callback must be atomic.
1873 * @set_rekey_data: If the device supports GTK rekeying, for example while the
1874 * host is suspended, it can assign this callback to retrieve the data
1875 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter.
1876 * After rekeying was done it should (for example during resume) notify
1877 * userspace of the new replay counter using ieee80211_gtk_rekey_notify().
1879 * @hw_scan: Ask the hardware to service the scan request, no need to start
1880 * the scan state machine in stack. The scan must honour the channel
1881 * configuration done by the regulatory agent in the wiphy's
1882 * registered bands. The hardware (or the driver) needs to make sure
1883 * that power save is disabled.
1884 * The @req ie/ie_len members are rewritten by mac80211 to contain the
1885 * entire IEs after the SSID, so that drivers need not look at these
1886 * at all but just send them after the SSID -- mac80211 includes the
1887 * (extended) supported rates and HT information (where applicable).
1888 * When the scan finishes, ieee80211_scan_completed() must be called;
1889 * note that it also must be called when the scan cannot finish due to
1890 * any error unless this callback returned a negative error code.
1891 * The callback can sleep.
1893 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan.
1894 * The driver should ask the hardware to cancel the scan (if possible),
1895 * but the scan will be completed only after the driver will call
1896 * ieee80211_scan_completed().
1897 * This callback is needed for wowlan, to prevent enqueueing a new
1898 * scan_work after the low-level driver was already suspended.
1899 * The callback can sleep.
1901 * @sched_scan_start: Ask the hardware to start scanning repeatedly at
1902 * specific intervals. The driver must call the
1903 * ieee80211_sched_scan_results() function whenever it finds results.
1904 * This process will continue until sched_scan_stop is called.
1906 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan.
1908 * @sw_scan_start: Notifier function that is called just before a software scan
1909 * is started. Can be NULL, if the driver doesn't need this notification.
1910 * The callback can sleep.
1912 * @sw_scan_complete: Notifier function that is called just after a
1913 * software scan finished. Can be NULL, if the driver doesn't need
1914 * this notification.
1915 * The callback can sleep.
1917 * @get_stats: Return low-level statistics.
1918 * Returns zero if statistics are available.
1919 * The callback can sleep.
1921 * @get_tkip_seq: If your device implements TKIP encryption in hardware this
1922 * callback should be provided to read the TKIP transmit IVs (both IV32
1923 * and IV16) for the given key from hardware.
1924 * The callback must be atomic.
1926 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this
1927 * if the device does fragmentation by itself; if this callback is
1928 * implemented then the stack will not do fragmentation.
1929 * The callback can sleep.
1931 * @set_rts_threshold: Configuration of RTS threshold (if device needs it)
1932 * The callback can sleep.
1934 * @sta_add: Notifies low level driver about addition of an associated station,
1935 * AP, IBSS/WDS/mesh peer etc. This callback can sleep.
1937 * @sta_remove: Notifies low level driver about removal of an associated
1938 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep.
1940 * @sta_notify: Notifies low level driver about power state transition of an
1941 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating
1942 * in AP mode, this callback will not be called when the flag
1943 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic.
1945 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
1946 * bursting) for a hardware TX queue.
1947 * Returns a negative error code on failure.
1948 * The callback can sleep.
1950 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
1951 * this is only used for IBSS mode BSSID merging and debugging. Is not a
1952 * required function.
1953 * The callback can sleep.
1955 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware.
1956 * Currently, this is only used for IBSS mode debugging. Is not a
1957 * required function.
1958 * The callback can sleep.
1960 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
1961 * with other STAs in the IBSS. This is only used in IBSS mode. This
1962 * function is optional if the firmware/hardware takes full care of
1963 * TSF synchronization.
1964 * The callback can sleep.
1966 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
1967 * This is needed only for IBSS mode and the result of this function is
1968 * used to determine whether to reply to Probe Requests.
1969 * Returns non-zero if this device sent the last beacon.
1970 * The callback can sleep.
1972 * @ampdu_action: Perform a certain A-MPDU action
1973 * The RA/TID combination determines the destination and TID we want
1974 * the ampdu action to be performed for. The action is defined through
1975 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn)
1976 * is the first frame we expect to perform the action on. Notice
1977 * that TX/RX_STOP can pass NULL for this parameter.
1978 * The @buf_size parameter is only valid when the action is set to
1979 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder
1980 * buffer size (number of subframes) for this session -- the driver
1981 * may neither send aggregates containing more subframes than this
1982 * nor send aggregates in a way that lost frames would exceed the
1983 * buffer size. If just limiting the aggregate size, this would be
1984 * possible with a buf_size of 8:
1986 * - RX: 2....7 (lost frame #1)
1988 * which is invalid since #1 was now re-transmitted well past the
1989 * buffer size of 8. Correct ways to retransmit #1 would be:
1990 * - TX: 1 or 18 or 81
1991 * Even "189" would be wrong since 1 could be lost again.
1993 * Returns a negative error code on failure.
1994 * The callback can sleep.
1996 * @get_survey: Return per-channel survey information
1998 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also
1999 * need to set wiphy->rfkill_poll to %true before registration,
2000 * and need to call wiphy_rfkill_set_hw_state() in the callback.
2001 * The callback can sleep.
2003 * @set_coverage_class: Set slot time for given coverage class as specified
2004 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout
2005 * accordingly. This callback is not required and may sleep.
2007 * @testmode_cmd: Implement a cfg80211 test mode command.
2008 * The callback can sleep.
2009 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep.
2011 * @flush: Flush all pending frames from the hardware queue, making sure
2012 * that the hardware queues are empty. If the parameter @drop is set
2013 * to %true, pending frames may be dropped. The callback can sleep.
2015 * @channel_switch: Drivers that need (or want) to offload the channel
2016 * switch operation for CSAs received from the AP may implement this
2017 * callback. They must then call ieee80211_chswitch_done() to indicate
2018 * completion of the channel switch.
2020 * @napi_poll: Poll Rx queue for incoming data frames.
2022 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device.
2023 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may
2024 * reject TX/RX mask combinations they cannot support by returning -EINVAL
2025 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX).
2027 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant).
2029 * @remain_on_channel: Starts an off-channel period on the given channel, must
2030 * call back to ieee80211_ready_on_channel() when on that channel. Note
2031 * that normal channel traffic is not stopped as this is intended for hw
2032 * offload. Frames to transmit on the off-channel channel are transmitted
2033 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the
2034 * duration (which will always be non-zero) expires, the driver must call
2035 * ieee80211_remain_on_channel_expired(). This callback may sleep.
2036 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is
2037 * aborted before it expires. This callback may sleep.
2039 * @set_ringparam: Set tx and rx ring sizes.
2041 * @get_ringparam: Get tx and rx ring current and maximum sizes.
2043 * @tx_frames_pending: Check if there is any pending frame in the hardware
2044 * queues before entering power save.
2046 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection
2047 * when transmitting a frame. Currently only legacy rates are handled.
2048 * The callback can sleep.
2049 * @rssi_callback: Notify driver when the average RSSI goes above/below
2050 * thresholds that were registered previously. The callback can sleep.
2052 * @release_buffered_frames: Release buffered frames according to the given
2053 * parameters. In the case where the driver buffers some frames for
2054 * sleeping stations mac80211 will use this callback to tell the driver
2055 * to release some frames, either for PS-poll or uAPSD.
2056 * Note that if the @more_data paramter is %false the driver must check
2057 * if there are more frames on the given TIDs, and if there are more than
2058 * the frames being released then it must still set the more-data bit in
2059 * the frame. If the @more_data parameter is %true, then of course the
2060 * more-data bit must always be set.
2061 * The @tids parameter tells the driver which TIDs to release frames
2062 * from, for PS-poll it will always have only a single bit set.
2063 * In the case this is used for a PS-poll initiated release, the
2064 * @num_frames parameter will always be 1 so code can be shared. In
2065 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag
2066 * on the TX status (and must report TX status) so that the PS-poll
2067 * period is properly ended. This is used to avoid sending multiple
2068 * responses for a retried PS-poll frame.
2069 * In the case this is used for uAPSD, the @num_frames parameter may be
2070 * bigger than one, but the driver may send fewer frames (it must send
2071 * at least one, however). In this case it is also responsible for
2072 * setting the EOSP flag in the QoS header of the frames. Also, when the
2073 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP
2074 * on the last frame in the SP. Alternatively, it may call the function
2075 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP.
2076 * This callback must be atomic.
2077 * @allow_buffered_frames: Prepare device to allow the given number of frames
2078 * to go out to the given station. The frames will be sent by mac80211
2079 * via the usual TX path after this call. The TX information for frames
2080 * released will also have the %IEEE80211_TX_CTL_POLL_RESPONSE flag set
2081 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case
2082 * frames from multiple TIDs are released and the driver might reorder
2083 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag
2084 * on the last frame and clear it on all others and also handle the EOSP
2085 * bit in the QoS header correctly. Alternatively, it can also call the
2086 * ieee80211_sta_eosp_irqsafe() function.
2087 * The @tids parameter is a bitmap and tells the driver which TIDs the
2088 * frames will be on; it will at most have two bits set.
2089 * This callback must be atomic.
2091 struct ieee80211_ops {
2092 void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb);
2093 int (*start)(struct ieee80211_hw *hw);
2094 void (*stop)(struct ieee80211_hw *hw);
2096 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan);
2097 int (*resume)(struct ieee80211_hw *hw);
2099 int (*add_interface)(struct ieee80211_hw *hw,
2100 struct ieee80211_vif *vif);
2101 int (*change_interface)(struct ieee80211_hw *hw,
2102 struct ieee80211_vif *vif,
2103 enum nl80211_iftype new_type, bool p2p);
2104 void (*remove_interface)(struct ieee80211_hw *hw,
2105 struct ieee80211_vif *vif);
2106 int (*config)(struct ieee80211_hw *hw, u32 changed);
2107 void (*bss_info_changed)(struct ieee80211_hw *hw,
2108 struct ieee80211_vif *vif,
2109 struct ieee80211_bss_conf *info,
2112 int (*tx_sync)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2113 const u8 *bssid, enum ieee80211_tx_sync_type type);
2114 void (*finish_tx_sync)(struct ieee80211_hw *hw,
2115 struct ieee80211_vif *vif,
2117 enum ieee80211_tx_sync_type type);
2119 u64 (*prepare_multicast)(struct ieee80211_hw *hw,
2120 struct netdev_hw_addr_list *mc_list);
2121 void (*configure_filter)(struct ieee80211_hw *hw,
2122 unsigned int changed_flags,
2123 unsigned int *total_flags,
2125 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
2127 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2128 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2129 struct ieee80211_key_conf *key);
2130 void (*update_tkip_key)(struct ieee80211_hw *hw,
2131 struct ieee80211_vif *vif,
2132 struct ieee80211_key_conf *conf,
2133 struct ieee80211_sta *sta,
2134 u32 iv32, u16 *phase1key);
2135 void (*set_rekey_data)(struct ieee80211_hw *hw,
2136 struct ieee80211_vif *vif,
2137 struct cfg80211_gtk_rekey_data *data);
2138 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2139 struct cfg80211_scan_request *req);
2140 void (*cancel_hw_scan)(struct ieee80211_hw *hw,
2141 struct ieee80211_vif *vif);
2142 int (*sched_scan_start)(struct ieee80211_hw *hw,
2143 struct ieee80211_vif *vif,
2144 struct cfg80211_sched_scan_request *req,
2145 struct ieee80211_sched_scan_ies *ies);
2146 void (*sched_scan_stop)(struct ieee80211_hw *hw,
2147 struct ieee80211_vif *vif);
2148 void (*sw_scan_start)(struct ieee80211_hw *hw);
2149 void (*sw_scan_complete)(struct ieee80211_hw *hw);
2150 int (*get_stats)(struct ieee80211_hw *hw,
2151 struct ieee80211_low_level_stats *stats);
2152 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
2153 u32 *iv32, u16 *iv16);
2154 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
2155 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
2156 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2157 struct ieee80211_sta *sta);
2158 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2159 struct ieee80211_sta *sta);
2160 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2161 enum sta_notify_cmd, struct ieee80211_sta *sta);
2162 int (*conf_tx)(struct ieee80211_hw *hw,
2163 struct ieee80211_vif *vif, u16 queue,
2164 const struct ieee80211_tx_queue_params *params);
2165 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
2166 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2168 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
2169 int (*tx_last_beacon)(struct ieee80211_hw *hw);
2170 int (*ampdu_action)(struct ieee80211_hw *hw,
2171 struct ieee80211_vif *vif,
2172 enum ieee80211_ampdu_mlme_action action,
2173 struct ieee80211_sta *sta, u16 tid, u16 *ssn,
2175 int (*get_survey)(struct ieee80211_hw *hw, int idx,
2176 struct survey_info *survey);
2177 void (*rfkill_poll)(struct ieee80211_hw *hw);
2178 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class);
2179 #ifdef CONFIG_NL80211_TESTMODE
2180 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len);
2181 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb,
2182 struct netlink_callback *cb,
2183 void *data, int len);
2185 void (*flush)(struct ieee80211_hw *hw, bool drop);
2186 void (*channel_switch)(struct ieee80211_hw *hw,
2187 struct ieee80211_channel_switch *ch_switch);
2188 int (*napi_poll)(struct ieee80211_hw *hw, int budget);
2189 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
2190 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
2192 int (*remain_on_channel)(struct ieee80211_hw *hw,
2193 struct ieee80211_channel *chan,
2194 enum nl80211_channel_type channel_type,
2196 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw);
2197 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx);
2198 void (*get_ringparam)(struct ieee80211_hw *hw,
2199 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
2200 bool (*tx_frames_pending)(struct ieee80211_hw *hw);
2201 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2202 const struct cfg80211_bitrate_mask *mask);
2203 void (*rssi_callback)(struct ieee80211_hw *hw,
2204 enum ieee80211_rssi_event rssi_event);
2206 void (*allow_buffered_frames)(struct ieee80211_hw *hw,
2207 struct ieee80211_sta *sta,
2208 u16 tids, int num_frames,
2209 enum ieee80211_frame_release_type reason,
2211 void (*release_buffered_frames)(struct ieee80211_hw *hw,
2212 struct ieee80211_sta *sta,
2213 u16 tids, int num_frames,
2214 enum ieee80211_frame_release_type reason,
2219 * ieee80211_alloc_hw - Allocate a new hardware device
2221 * This must be called once for each hardware device. The returned pointer
2222 * must be used to refer to this device when calling other functions.
2223 * mac80211 allocates a private data area for the driver pointed to by
2224 * @priv in &struct ieee80211_hw, the size of this area is given as
2227 * @priv_data_len: length of private data
2228 * @ops: callbacks for this device
2230 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
2231 const struct ieee80211_ops *ops);
2234 * ieee80211_register_hw - Register hardware device
2236 * You must call this function before any other functions in
2237 * mac80211. Note that before a hardware can be registered, you
2238 * need to fill the contained wiphy's information.
2240 * @hw: the device to register as returned by ieee80211_alloc_hw()
2242 int ieee80211_register_hw(struct ieee80211_hw *hw);
2245 * struct ieee80211_tpt_blink - throughput blink description
2246 * @throughput: throughput in Kbit/sec
2247 * @blink_time: blink time in milliseconds
2248 * (full cycle, ie. one off + one on period)
2250 struct ieee80211_tpt_blink {
2256 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags
2257 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio
2258 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working
2259 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one
2260 * interface is connected in some way, including being an AP
2262 enum ieee80211_tpt_led_trigger_flags {
2263 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0),
2264 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1),
2265 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2),
2268 #ifdef CONFIG_MAC80211_LEDS
2269 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
2270 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
2271 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
2272 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw);
2273 extern char *__ieee80211_create_tpt_led_trigger(
2274 struct ieee80211_hw *hw, unsigned int flags,
2275 const struct ieee80211_tpt_blink *blink_table,
2276 unsigned int blink_table_len);
2279 * ieee80211_get_tx_led_name - get name of TX LED
2281 * mac80211 creates a transmit LED trigger for each wireless hardware
2282 * that can be used to drive LEDs if your driver registers a LED device.
2283 * This function returns the name (or %NULL if not configured for LEDs)
2284 * of the trigger so you can automatically link the LED device.
2286 * @hw: the hardware to get the LED trigger name for
2288 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
2290 #ifdef CONFIG_MAC80211_LEDS
2291 return __ieee80211_get_tx_led_name(hw);
2298 * ieee80211_get_rx_led_name - get name of RX LED
2300 * mac80211 creates a receive LED trigger for each wireless hardware
2301 * that can be used to drive LEDs if your driver registers a LED device.
2302 * This function returns the name (or %NULL if not configured for LEDs)
2303 * of the trigger so you can automatically link the LED device.
2305 * @hw: the hardware to get the LED trigger name for
2307 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
2309 #ifdef CONFIG_MAC80211_LEDS
2310 return __ieee80211_get_rx_led_name(hw);
2317 * ieee80211_get_assoc_led_name - get name of association LED
2319 * mac80211 creates a association LED trigger for each wireless hardware
2320 * that can be used to drive LEDs if your driver registers a LED device.
2321 * This function returns the name (or %NULL if not configured for LEDs)
2322 * of the trigger so you can automatically link the LED device.
2324 * @hw: the hardware to get the LED trigger name for
2326 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
2328 #ifdef CONFIG_MAC80211_LEDS
2329 return __ieee80211_get_assoc_led_name(hw);
2336 * ieee80211_get_radio_led_name - get name of radio LED
2338 * mac80211 creates a radio change LED trigger for each wireless hardware
2339 * that can be used to drive LEDs if your driver registers a LED device.
2340 * This function returns the name (or %NULL if not configured for LEDs)
2341 * of the trigger so you can automatically link the LED device.
2343 * @hw: the hardware to get the LED trigger name for
2345 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
2347 #ifdef CONFIG_MAC80211_LEDS
2348 return __ieee80211_get_radio_led_name(hw);
2355 * ieee80211_create_tpt_led_trigger - create throughput LED trigger
2356 * @hw: the hardware to create the trigger for
2357 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags
2358 * @blink_table: the blink table -- needs to be ordered by throughput
2359 * @blink_table_len: size of the blink table
2361 * This function returns %NULL (in case of error, or if no LED
2362 * triggers are configured) or the name of the new trigger.
2363 * This function must be called before ieee80211_register_hw().
2365 static inline char *
2366 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags,
2367 const struct ieee80211_tpt_blink *blink_table,
2368 unsigned int blink_table_len)
2370 #ifdef CONFIG_MAC80211_LEDS
2371 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table,
2379 * ieee80211_unregister_hw - Unregister a hardware device
2381 * This function instructs mac80211 to free allocated resources
2382 * and unregister netdevices from the networking subsystem.
2384 * @hw: the hardware to unregister
2386 void ieee80211_unregister_hw(struct ieee80211_hw *hw);
2389 * ieee80211_free_hw - free hardware descriptor
2391 * This function frees everything that was allocated, including the
2392 * private data for the driver. You must call ieee80211_unregister_hw()
2393 * before calling this function.
2395 * @hw: the hardware to free
2397 void ieee80211_free_hw(struct ieee80211_hw *hw);
2400 * ieee80211_restart_hw - restart hardware completely
2402 * Call this function when the hardware was restarted for some reason
2403 * (hardware error, ...) and the driver is unable to restore its state
2404 * by itself. mac80211 assumes that at this point the driver/hardware
2405 * is completely uninitialised and stopped, it starts the process by
2406 * calling the ->start() operation. The driver will need to reset all
2407 * internal state that it has prior to calling this function.
2409 * @hw: the hardware to restart
2411 void ieee80211_restart_hw(struct ieee80211_hw *hw);
2413 /** ieee80211_napi_schedule - schedule NAPI poll
2415 * Use this function to schedule NAPI polling on a device.
2417 * @hw: the hardware to start polling
2419 void ieee80211_napi_schedule(struct ieee80211_hw *hw);
2421 /** ieee80211_napi_complete - complete NAPI polling
2423 * Use this function to finish NAPI polling on a device.
2425 * @hw: the hardware to stop polling
2427 void ieee80211_napi_complete(struct ieee80211_hw *hw);
2430 * ieee80211_rx - receive frame
2432 * Use this function to hand received frames to mac80211. The receive
2433 * buffer in @skb must start with an IEEE 802.11 header. In case of a
2434 * paged @skb is used, the driver is recommended to put the ieee80211
2435 * header of the frame on the linear part of the @skb to avoid memory
2436 * allocation and/or memcpy by the stack.
2438 * This function may not be called in IRQ context. Calls to this function
2439 * for a single hardware must be synchronized against each other. Calls to
2440 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be
2441 * mixed for a single hardware.
2443 * In process context use instead ieee80211_rx_ni().
2445 * @hw: the hardware this frame came in on
2446 * @skb: the buffer to receive, owned by mac80211 after this call
2448 void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb);
2451 * ieee80211_rx_irqsafe - receive frame
2453 * Like ieee80211_rx() but can be called in IRQ context
2454 * (internally defers to a tasklet.)
2456 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not
2457 * be mixed for a single hardware.
2459 * @hw: the hardware this frame came in on
2460 * @skb: the buffer to receive, owned by mac80211 after this call
2462 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb);
2465 * ieee80211_rx_ni - receive frame (in process context)
2467 * Like ieee80211_rx() but can be called in process context
2468 * (internally disables bottom halves).
2470 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may
2471 * not be mixed for a single hardware.
2473 * @hw: the hardware this frame came in on
2474 * @skb: the buffer to receive, owned by mac80211 after this call
2476 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw,
2477 struct sk_buff *skb)
2480 ieee80211_rx(hw, skb);
2485 * ieee80211_sta_ps_transition - PS transition for connected sta
2487 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS
2488 * flag set, use this function to inform mac80211 about a connected station
2489 * entering/leaving PS mode.
2491 * This function may not be called in IRQ context or with softirqs enabled.
2493 * Calls to this function for a single hardware must be synchronized against
2496 * The function returns -EINVAL when the requested PS mode is already set.
2498 * @sta: currently connected sta
2499 * @start: start or stop PS
2501 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start);
2504 * ieee80211_sta_ps_transition_ni - PS transition for connected sta
2505 * (in process context)
2507 * Like ieee80211_sta_ps_transition() but can be called in process context
2508 * (internally disables bottom halves). Concurrent call restriction still
2511 * @sta: currently connected sta
2512 * @start: start or stop PS
2514 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta,
2520 ret = ieee80211_sta_ps_transition(sta, start);
2527 * The TX headroom reserved by mac80211 for its own tx_status functions.
2528 * This is enough for the radiotap header.
2530 #define IEEE80211_TX_STATUS_HEADROOM 14
2533 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames
2534 * @sta: &struct ieee80211_sta pointer for the sleeping station
2535 * @tid: the TID that has buffered frames
2536 * @buffered: indicates whether or not frames are buffered for this TID
2538 * If a driver buffers frames for a powersave station instead of passing
2539 * them back to mac80211 for retransmission, the station may still need
2540 * to be told that there are buffered frames via the TIM bit.
2542 * This function informs mac80211 whether or not there are frames that are
2543 * buffered in the driver for a given TID; mac80211 can then use this data
2544 * to set the TIM bit (NOTE: This may call back into the driver's set_tim
2545 * call! Beware of the locking!)
2547 * If all frames are released to the station (due to PS-poll or uAPSD)
2548 * then the driver needs to inform mac80211 that there no longer are
2549 * frames buffered. However, when the station wakes up mac80211 assumes
2550 * that all buffered frames will be transmitted and clears this data,
2551 * drivers need to make sure they inform mac80211 about all buffered
2552 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP).
2554 * Note that technically mac80211 only needs to know this per AC, not per
2555 * TID, but since driver buffering will inevitably happen per TID (since
2556 * it is related to aggregation) it is easier to make mac80211 map the
2557 * TID to the AC as required instead of keeping track in all drivers that
2560 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta,
2561 u8 tid, bool buffered);
2564 * ieee80211_tx_status - transmit status callback
2566 * Call this function for all transmitted frames after they have been
2567 * transmitted. It is permissible to not call this function for
2568 * multicast frames but this can affect statistics.
2570 * This function may not be called in IRQ context. Calls to this function
2571 * for a single hardware must be synchronized against each other. Calls
2572 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe()
2573 * may not be mixed for a single hardware.
2575 * @hw: the hardware the frame was transmitted by
2576 * @skb: the frame that was transmitted, owned by mac80211 after this call
2578 void ieee80211_tx_status(struct ieee80211_hw *hw,
2579 struct sk_buff *skb);
2582 * ieee80211_tx_status_ni - transmit status callback (in process context)
2584 * Like ieee80211_tx_status() but can be called in process context.
2586 * Calls to this function, ieee80211_tx_status() and
2587 * ieee80211_tx_status_irqsafe() may not be mixed
2588 * for a single hardware.
2590 * @hw: the hardware the frame was transmitted by
2591 * @skb: the frame that was transmitted, owned by mac80211 after this call
2593 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw,
2594 struct sk_buff *skb)
2597 ieee80211_tx_status(hw, skb);
2602 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback
2604 * Like ieee80211_tx_status() but can be called in IRQ context
2605 * (internally defers to a tasklet.)
2607 * Calls to this function, ieee80211_tx_status() and
2608 * ieee80211_tx_status_ni() may not be mixed for a single hardware.
2610 * @hw: the hardware the frame was transmitted by
2611 * @skb: the frame that was transmitted, owned by mac80211 after this call
2613 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
2614 struct sk_buff *skb);
2617 * ieee80211_report_low_ack - report non-responding station
2619 * When operating in AP-mode, call this function to report a non-responding
2622 * @sta: the non-responding connected sta
2623 * @num_packets: number of packets sent to @sta without a response
2625 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets);
2628 * ieee80211_beacon_get_tim - beacon generation function
2629 * @hw: pointer obtained from ieee80211_alloc_hw().
2630 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2631 * @tim_offset: pointer to variable that will receive the TIM IE offset.
2632 * Set to 0 if invalid (in non-AP modes).
2633 * @tim_length: pointer to variable that will receive the TIM IE length,
2634 * (including the ID and length bytes!).
2635 * Set to 0 if invalid (in non-AP modes).
2637 * If the driver implements beaconing modes, it must use this function to
2638 * obtain the beacon frame/template.
2640 * If the beacon frames are generated by the host system (i.e., not in
2641 * hardware/firmware), the driver uses this function to get each beacon
2642 * frame from mac80211 -- it is responsible for calling this function
2643 * before the beacon is needed (e.g. based on hardware interrupt).
2645 * If the beacon frames are generated by the device, then the driver
2646 * must use the returned beacon as the template and change the TIM IE
2647 * according to the current DTIM parameters/TIM bitmap.
2649 * The driver is responsible for freeing the returned skb.
2651 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
2652 struct ieee80211_vif *vif,
2653 u16 *tim_offset, u16 *tim_length);
2656 * ieee80211_beacon_get - beacon generation function
2657 * @hw: pointer obtained from ieee80211_alloc_hw().
2658 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2660 * See ieee80211_beacon_get_tim().
2662 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
2663 struct ieee80211_vif *vif)
2665 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL);
2669 * ieee80211_pspoll_get - retrieve a PS Poll template
2670 * @hw: pointer obtained from ieee80211_alloc_hw().
2671 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2673 * Creates a PS Poll a template which can, for example, uploaded to
2674 * hardware. The template must be updated after association so that correct
2675 * AID, BSSID and MAC address is used.
2677 * Note: Caller (or hardware) is responsible for setting the
2678 * &IEEE80211_FCTL_PM bit.
2680 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
2681 struct ieee80211_vif *vif);
2684 * ieee80211_nullfunc_get - retrieve a nullfunc template
2685 * @hw: pointer obtained from ieee80211_alloc_hw().
2686 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2688 * Creates a Nullfunc template which can, for example, uploaded to
2689 * hardware. The template must be updated after association so that correct
2690 * BSSID and address is used.
2692 * Note: Caller (or hardware) is responsible for setting the
2693 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields.
2695 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
2696 struct ieee80211_vif *vif);
2699 * ieee80211_probereq_get - retrieve a Probe Request template
2700 * @hw: pointer obtained from ieee80211_alloc_hw().
2701 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2702 * @ssid: SSID buffer
2703 * @ssid_len: length of SSID
2704 * @ie: buffer containing all IEs except SSID for the template
2705 * @ie_len: length of the IE buffer
2707 * Creates a Probe Request template which can, for example, be uploaded to
2710 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
2711 struct ieee80211_vif *vif,
2712 const u8 *ssid, size_t ssid_len,
2713 const u8 *ie, size_t ie_len);
2716 * ieee80211_rts_get - RTS frame generation function
2717 * @hw: pointer obtained from ieee80211_alloc_hw().
2718 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2719 * @frame: pointer to the frame that is going to be protected by the RTS.
2720 * @frame_len: the frame length (in octets).
2721 * @frame_txctl: &struct ieee80211_tx_info of the frame.
2722 * @rts: The buffer where to store the RTS frame.
2724 * If the RTS frames are generated by the host system (i.e., not in
2725 * hardware/firmware), the low-level driver uses this function to receive
2726 * the next RTS frame from the 802.11 code. The low-level is responsible
2727 * for calling this function before and RTS frame is needed.
2729 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2730 const void *frame, size_t frame_len,
2731 const struct ieee80211_tx_info *frame_txctl,
2732 struct ieee80211_rts *rts);
2735 * ieee80211_rts_duration - Get the duration field for an RTS frame
2736 * @hw: pointer obtained from ieee80211_alloc_hw().
2737 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2738 * @frame_len: the length of the frame that is going to be protected by the RTS.
2739 * @frame_txctl: &struct ieee80211_tx_info of the frame.
2741 * If the RTS is generated in firmware, but the host system must provide
2742 * the duration field, the low-level driver uses this function to receive
2743 * the duration field value in little-endian byteorder.
2745 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
2746 struct ieee80211_vif *vif, size_t frame_len,
2747 const struct ieee80211_tx_info *frame_txctl);
2750 * ieee80211_ctstoself_get - CTS-to-self frame generation function
2751 * @hw: pointer obtained from ieee80211_alloc_hw().
2752 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2753 * @frame: pointer to the frame that is going to be protected by the CTS-to-self.
2754 * @frame_len: the frame length (in octets).
2755 * @frame_txctl: &struct ieee80211_tx_info of the frame.
2756 * @cts: The buffer where to store the CTS-to-self frame.
2758 * If the CTS-to-self frames are generated by the host system (i.e., not in
2759 * hardware/firmware), the low-level driver uses this function to receive
2760 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible
2761 * for calling this function before and CTS-to-self frame is needed.
2763 void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
2764 struct ieee80211_vif *vif,
2765 const void *frame, size_t frame_len,
2766 const struct ieee80211_tx_info *frame_txctl,
2767 struct ieee80211_cts *cts);
2770 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
2771 * @hw: pointer obtained from ieee80211_alloc_hw().
2772 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2773 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
2774 * @frame_txctl: &struct ieee80211_tx_info of the frame.
2776 * If the CTS-to-self is generated in firmware, but the host system must provide
2777 * the duration field, the low-level driver uses this function to receive
2778 * the duration field value in little-endian byteorder.
2780 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
2781 struct ieee80211_vif *vif,
2783 const struct ieee80211_tx_info *frame_txctl);
2786 * ieee80211_generic_frame_duration - Calculate the duration field for a frame
2787 * @hw: pointer obtained from ieee80211_alloc_hw().
2788 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2789 * @frame_len: the length of the frame.
2790 * @rate: the rate at which the frame is going to be transmitted.
2792 * Calculate the duration field of some generic frame, given its
2793 * length and transmission rate (in 100kbps).
2795 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
2796 struct ieee80211_vif *vif,
2798 struct ieee80211_rate *rate);
2801 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
2802 * @hw: pointer as obtained from ieee80211_alloc_hw().
2803 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2805 * Function for accessing buffered broadcast and multicast frames. If
2806 * hardware/firmware does not implement buffering of broadcast/multicast
2807 * frames when power saving is used, 802.11 code buffers them in the host
2808 * memory. The low-level driver uses this function to fetch next buffered
2809 * frame. In most cases, this is used when generating beacon frame. This
2810 * function returns a pointer to the next buffered skb or NULL if no more
2811 * buffered frames are available.
2813 * Note: buffered frames are returned only after DTIM beacon frame was
2814 * generated with ieee80211_beacon_get() and the low-level driver must thus
2815 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
2816 * NULL if the previous generated beacon was not DTIM, so the low-level driver
2817 * does not need to check for DTIM beacons separately and should be able to
2818 * use common code for all beacons.
2821 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
2824 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32
2826 * This function returns the TKIP phase 1 key for the given IV32.
2828 * @keyconf: the parameter passed with the set key
2829 * @iv32: IV32 to get the P1K for
2830 * @p1k: a buffer to which the key will be written, as 5 u16 values
2832 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf,
2833 u32 iv32, u16 *p1k);
2836 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key
2838 * This function returns the TKIP phase 1 key for the IV32 taken
2839 * from the given packet.
2841 * @keyconf: the parameter passed with the set key
2842 * @skb: the packet to take the IV32 value from that will be encrypted
2844 * @p1k: a buffer to which the key will be written, as 5 u16 values
2846 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf,
2847 struct sk_buff *skb, u16 *p1k)
2849 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2850 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
2851 u32 iv32 = get_unaligned_le32(&data[4]);
2853 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k);
2857 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX
2859 * This function returns the TKIP phase 1 key for the given IV32
2860 * and transmitter address.
2862 * @keyconf: the parameter passed with the set key
2863 * @ta: TA that will be used with the key
2864 * @iv32: IV32 to get the P1K for
2865 * @p1k: a buffer to which the key will be written, as 5 u16 values
2867 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf,
2868 const u8 *ta, u32 iv32, u16 *p1k);
2871 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key
2873 * This function computes the TKIP RC4 key for the IV values
2876 * @keyconf: the parameter passed with the set key
2877 * @skb: the packet to take the IV32/IV16 values from that will be
2878 * encrypted with this key
2879 * @p2k: a buffer to which the key will be written, 16 bytes
2881 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf,
2882 struct sk_buff *skb, u8 *p2k);
2885 * struct ieee80211_key_seq - key sequence counter
2887 * @tkip: TKIP data, containing IV32 and IV16 in host byte order
2888 * @ccmp: PN data, most significant byte first (big endian,
2889 * reverse order than in packet)
2890 * @aes_cmac: PN data, most significant byte first (big endian,
2891 * reverse order than in packet)
2893 struct ieee80211_key_seq {
2909 * ieee80211_get_key_tx_seq - get key TX sequence counter
2911 * @keyconf: the parameter passed with the set key
2912 * @seq: buffer to receive the sequence data
2914 * This function allows a driver to retrieve the current TX IV/PN
2915 * for the given key. It must not be called if IV generation is
2916 * offloaded to the device.
2918 * Note that this function may only be called when no TX processing
2919 * can be done concurrently, for example when queues are stopped
2920 * and the stop has been synchronized.
2922 void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf,
2923 struct ieee80211_key_seq *seq);
2926 * ieee80211_get_key_rx_seq - get key RX sequence counter
2928 * @keyconf: the parameter passed with the set key
2929 * @tid: The TID, or -1 for the management frame value (CCMP only);
2930 * the value on TID 0 is also used for non-QoS frames. For
2931 * CMAC, only TID 0 is valid.
2932 * @seq: buffer to receive the sequence data
2934 * This function allows a driver to retrieve the current RX IV/PNs
2935 * for the given key. It must not be called if IV checking is done
2936 * by the device and not by mac80211.
2938 * Note that this function may only be called when no RX processing
2939 * can be done concurrently.
2941 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
2942 int tid, struct ieee80211_key_seq *seq);
2945 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying
2946 * @vif: virtual interface the rekeying was done on
2947 * @bssid: The BSSID of the AP, for checking association
2948 * @replay_ctr: the new replay counter after GTK rekeying
2949 * @gfp: allocation flags
2951 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
2952 const u8 *replay_ctr, gfp_t gfp);
2955 * ieee80211_wake_queue - wake specific queue
2956 * @hw: pointer as obtained from ieee80211_alloc_hw().
2957 * @queue: queue number (counted from zero).
2959 * Drivers should use this function instead of netif_wake_queue.
2961 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
2964 * ieee80211_stop_queue - stop specific queue
2965 * @hw: pointer as obtained from ieee80211_alloc_hw().
2966 * @queue: queue number (counted from zero).
2968 * Drivers should use this function instead of netif_stop_queue.
2970 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
2973 * ieee80211_queue_stopped - test status of the queue
2974 * @hw: pointer as obtained from ieee80211_alloc_hw().
2975 * @queue: queue number (counted from zero).
2977 * Drivers should use this function instead of netif_stop_queue.
2980 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue);
2983 * ieee80211_stop_queues - stop all queues
2984 * @hw: pointer as obtained from ieee80211_alloc_hw().
2986 * Drivers should use this function instead of netif_stop_queue.
2988 void ieee80211_stop_queues(struct ieee80211_hw *hw);
2991 * ieee80211_wake_queues - wake all queues
2992 * @hw: pointer as obtained from ieee80211_alloc_hw().
2994 * Drivers should use this function instead of netif_wake_queue.
2996 void ieee80211_wake_queues(struct ieee80211_hw *hw);
2999 * ieee80211_scan_completed - completed hardware scan
3001 * When hardware scan offload is used (i.e. the hw_scan() callback is
3002 * assigned) this function needs to be called by the driver to notify
3003 * mac80211 that the scan finished. This function can be called from
3004 * any context, including hardirq context.
3006 * @hw: the hardware that finished the scan
3007 * @aborted: set to true if scan was aborted
3009 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted);
3012 * ieee80211_sched_scan_results - got results from scheduled scan
3014 * When a scheduled scan is running, this function needs to be called by the
3015 * driver whenever there are new scan results available.
3017 * @hw: the hardware that is performing scheduled scans
3019 void ieee80211_sched_scan_results(struct ieee80211_hw *hw);
3022 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped
3024 * When a scheduled scan is running, this function can be called by
3025 * the driver if it needs to stop the scan to perform another task.
3026 * Usual scenarios are drivers that cannot continue the scheduled scan
3027 * while associating, for instance.
3029 * @hw: the hardware that is performing scheduled scans
3031 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw);
3034 * ieee80211_iterate_active_interfaces - iterate active interfaces
3036 * This function iterates over the interfaces associated with a given
3037 * hardware that are currently active and calls the callback for them.
3038 * This function allows the iterator function to sleep, when the iterator
3039 * function is atomic @ieee80211_iterate_active_interfaces_atomic can
3041 * Does not iterate over a new interface during add_interface()
3043 * @hw: the hardware struct of which the interfaces should be iterated over
3044 * @iterator: the iterator function to call
3045 * @data: first argument of the iterator function
3047 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
3048 void (*iterator)(void *data, u8 *mac,
3049 struct ieee80211_vif *vif),
3053 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces
3055 * This function iterates over the interfaces associated with a given
3056 * hardware that are currently active and calls the callback for them.
3057 * This function requires the iterator callback function to be atomic,
3058 * if that is not desired, use @ieee80211_iterate_active_interfaces instead.
3059 * Does not iterate over a new interface during add_interface()
3061 * @hw: the hardware struct of which the interfaces should be iterated over
3062 * @iterator: the iterator function to call, cannot sleep
3063 * @data: first argument of the iterator function
3065 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw,
3066 void (*iterator)(void *data,
3068 struct ieee80211_vif *vif),
3072 * ieee80211_queue_work - add work onto the mac80211 workqueue
3074 * Drivers and mac80211 use this to add work onto the mac80211 workqueue.
3075 * This helper ensures drivers are not queueing work when they should not be.
3077 * @hw: the hardware struct for the interface we are adding work for
3078 * @work: the work we want to add onto the mac80211 workqueue
3080 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work);
3083 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue
3085 * Drivers and mac80211 use this to queue delayed work onto the mac80211
3088 * @hw: the hardware struct for the interface we are adding work for
3089 * @dwork: delayable work to queue onto the mac80211 workqueue
3090 * @delay: number of jiffies to wait before queueing
3092 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
3093 struct delayed_work *dwork,
3094 unsigned long delay);
3097 * ieee80211_start_tx_ba_session - Start a tx Block Ack session.
3098 * @sta: the station for which to start a BA session
3099 * @tid: the TID to BA on.
3100 * @timeout: session timeout value (in TUs)
3102 * Return: success if addBA request was sent, failure otherwise
3104 * Although mac80211/low level driver/user space application can estimate
3105 * the need to start aggregation on a certain RA/TID, the session level
3106 * will be managed by the mac80211.
3108 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid,
3112 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
3113 * @vif: &struct ieee80211_vif pointer from the add_interface callback
3114 * @ra: receiver address of the BA session recipient.
3115 * @tid: the TID to BA on.
3117 * This function must be called by low level driver once it has
3118 * finished with preparations for the BA session. It can be called
3121 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra,
3125 * ieee80211_stop_tx_ba_session - Stop a Block Ack session.
3126 * @sta: the station whose BA session to stop
3127 * @tid: the TID to stop BA.
3129 * Return: negative error if the TID is invalid, or no aggregation active
3131 * Although mac80211/low level driver/user space application can estimate
3132 * the need to stop aggregation on a certain RA/TID, the session level
3133 * will be managed by the mac80211.
3135 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid);
3138 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
3139 * @vif: &struct ieee80211_vif pointer from the add_interface callback
3140 * @ra: receiver address of the BA session recipient.
3141 * @tid: the desired TID to BA on.
3143 * This function must be called by low level driver once it has
3144 * finished with preparations for the BA session tear down. It
3145 * can be called from any context.
3147 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra,
3151 * ieee80211_find_sta - find a station
3153 * @vif: virtual interface to look for station on
3154 * @addr: station's address
3156 * This function must be called under RCU lock and the
3157 * resulting pointer is only valid under RCU lock as well.
3159 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
3163 * ieee80211_find_sta_by_ifaddr - find a station on hardware
3165 * @hw: pointer as obtained from ieee80211_alloc_hw()
3166 * @addr: remote station's address
3167 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'.
3169 * This function must be called under RCU lock and the
3170 * resulting pointer is only valid under RCU lock as well.
3172 * NOTE: You may pass NULL for localaddr, but then you will just get
3173 * the first STA that matches the remote address 'addr'.
3174 * We can have multiple STA associated with multiple
3175 * logical stations (e.g. consider a station connecting to another
3176 * BSSID on the same AP hardware without disconnecting first).
3177 * In this case, the result of this method with localaddr NULL
3180 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible.
3182 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
3184 const u8 *localaddr);
3187 * ieee80211_sta_block_awake - block station from waking up
3189 * @pubsta: the station
3190 * @block: whether to block or unblock
3192 * Some devices require that all frames that are on the queues
3193 * for a specific station that went to sleep are flushed before
3194 * a poll response or frames after the station woke up can be
3195 * delivered to that it. Note that such frames must be rejected
3196 * by the driver as filtered, with the appropriate status flag.
3198 * This function allows implementing this mode in a race-free
3201 * To do this, a driver must keep track of the number of frames
3202 * still enqueued for a specific station. If this number is not
3203 * zero when the station goes to sleep, the driver must call
3204 * this function to force mac80211 to consider the station to
3205 * be asleep regardless of the station's actual state. Once the
3206 * number of outstanding frames reaches zero, the driver must
3207 * call this function again to unblock the station. That will
3208 * cause mac80211 to be able to send ps-poll responses, and if
3209 * the station queried in the meantime then frames will also
3210 * be sent out as a result of this. Additionally, the driver
3211 * will be notified that the station woke up some time after
3212 * it is unblocked, regardless of whether the station actually
3213 * woke up while blocked or not.
3215 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
3216 struct ieee80211_sta *pubsta, bool block);
3219 * ieee80211_sta_eosp - notify mac80211 about end of SP
3220 * @pubsta: the station
3222 * When a device transmits frames in a way that it can't tell
3223 * mac80211 in the TX status about the EOSP, it must clear the
3224 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead.
3225 * This applies for PS-Poll as well as uAPSD.
3227 * Note that there is no non-_irqsafe version right now as
3228 * it wasn't needed, but just like _tx_status() and _rx()
3229 * must not be mixed in irqsafe/non-irqsafe versions, this
3230 * function must not be mixed with those either. Use the
3231 * all irqsafe, or all non-irqsafe, don't mix! If you need
3232 * the non-irqsafe version of this, you need to add it.
3234 void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta);
3237 * ieee80211_iter_keys - iterate keys programmed into the device
3238 * @hw: pointer obtained from ieee80211_alloc_hw()
3239 * @vif: virtual interface to iterate, may be %NULL for all
3240 * @iter: iterator function that will be called for each key
3241 * @iter_data: custom data to pass to the iterator function
3243 * This function can be used to iterate all the keys known to
3244 * mac80211, even those that weren't previously programmed into
3245 * the device. This is intended for use in WoWLAN if the device
3246 * needs reprogramming of the keys during suspend. Note that due
3247 * to locking reasons, it is also only safe to call this at few
3248 * spots since it must hold the RTNL and be able to sleep.
3250 * The order in which the keys are iterated matches the order
3251 * in which they were originally installed and handed to the
3254 void ieee80211_iter_keys(struct ieee80211_hw *hw,
3255 struct ieee80211_vif *vif,
3256 void (*iter)(struct ieee80211_hw *hw,
3257 struct ieee80211_vif *vif,
3258 struct ieee80211_sta *sta,
3259 struct ieee80211_key_conf *key,
3264 * ieee80211_ap_probereq_get - retrieve a Probe Request template
3265 * @hw: pointer obtained from ieee80211_alloc_hw().
3266 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3268 * Creates a Probe Request template which can, for example, be uploaded to
3269 * hardware. The template is filled with bssid, ssid and supported rate
3270 * information. This function must only be called from within the
3271 * .bss_info_changed callback function and only in managed mode. The function
3272 * is only useful when the interface is associated, otherwise it will return
3275 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
3276 struct ieee80211_vif *vif);
3279 * ieee80211_beacon_loss - inform hardware does not receive beacons
3281 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3283 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER and
3284 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the
3285 * hardware is not receiving beacons with this function.
3287 void ieee80211_beacon_loss(struct ieee80211_vif *vif);
3290 * ieee80211_connection_loss - inform hardware has lost connection to the AP
3292 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3294 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER, and
3295 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver
3296 * needs to inform if the connection to the AP has been lost.
3298 * This function will cause immediate change to disassociated state,
3299 * without connection recovery attempts.
3301 void ieee80211_connection_loss(struct ieee80211_vif *vif);
3304 * ieee80211_resume_disconnect - disconnect from AP after resume
3306 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3308 * Instructs mac80211 to disconnect from the AP after resume.
3309 * Drivers can use this after WoWLAN if they know that the
3310 * connection cannot be kept up, for example because keys were
3311 * used while the device was asleep but the replay counters or
3312 * similar cannot be retrieved from the device during resume.
3314 * Note that due to implementation issues, if the driver uses
3315 * the reconfiguration functionality during resume the interface
3316 * will still be added as associated first during resume and then
3317 * disconnect normally later.
3319 * This function can only be called from the resume callback and
3320 * the driver must not be holding any of its own locks while it
3321 * calls this function, or at least not any locks it needs in the
3322 * key configuration paths (if it supports HW crypto).
3324 void ieee80211_resume_disconnect(struct ieee80211_vif *vif);
3327 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm
3329 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3331 * Some hardware require full power save to manage simultaneous BT traffic
3332 * on the WLAN frequency. Full PSM is required periodically, whenever there are
3333 * burst of BT traffic. The hardware gets information of BT traffic via
3334 * hardware co-existence lines, and consequentially requests mac80211 to
3335 * (temporarily) enter full psm.
3336 * This function will only temporarily disable dynamic PS, not enable PSM if
3337 * it was not already enabled.
3338 * The driver must make sure to re-enable dynamic PS using
3339 * ieee80211_enable_dyn_ps() if the driver has disabled it.
3342 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif);
3345 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled
3347 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3349 * This function restores dynamic PS after being temporarily disabled via
3350 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must
3351 * be coupled with an eventual call to this function.
3354 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif);
3357 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring
3358 * rssi threshold triggered
3360 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3361 * @rssi_event: the RSSI trigger event type
3362 * @gfp: context flags
3364 * When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality
3365 * monitoring is configured with an rssi threshold, the driver will inform
3366 * whenever the rssi level reaches the threshold.
3368 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
3369 enum nl80211_cqm_rssi_threshold_event rssi_event,
3373 * ieee80211_get_operstate - get the operstate of the vif
3375 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3377 * The driver might need to know the operstate of the net_device
3378 * (specifically, whether the link is IF_OPER_UP after resume)
3380 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif);
3383 * ieee80211_chswitch_done - Complete channel switch process
3384 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3385 * @success: make the channel switch successful or not
3387 * Complete the channel switch post-process: set the new operational channel
3388 * and wake up the suspended queues.
3390 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success);
3393 * ieee80211_request_smps - request SM PS transition
3394 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3395 * @smps_mode: new SM PS mode
3397 * This allows the driver to request an SM PS transition in managed
3398 * mode. This is useful when the driver has more information than
3399 * the stack about possible interference, for example by bluetooth.
3401 void ieee80211_request_smps(struct ieee80211_vif *vif,
3402 enum ieee80211_smps_mode smps_mode);
3405 * ieee80211_key_removed - disable hw acceleration for key
3406 * @key_conf: The key hw acceleration should be disabled for
3408 * This allows drivers to indicate that the given key has been
3409 * removed from hardware acceleration, due to a new key that
3410 * was added. Don't use this if the key can continue to be used
3411 * for TX, if the key restriction is on RX only it is permitted
3412 * to keep the key for TX only and not call this function.
3414 * Due to locking constraints, it may only be called during
3415 * @set_key. This function must be allowed to sleep, and the
3416 * key it tries to disable may still be used until it returns.
3418 void ieee80211_key_removed(struct ieee80211_key_conf *key_conf);
3421 * ieee80211_ready_on_channel - notification of remain-on-channel start
3422 * @hw: pointer as obtained from ieee80211_alloc_hw()
3424 void ieee80211_ready_on_channel(struct ieee80211_hw *hw);
3427 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired
3428 * @hw: pointer as obtained from ieee80211_alloc_hw()
3430 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw);
3433 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions
3435 * in order not to harm the system performance and user experience, the device
3436 * may request not to allow any rx ba session and tear down existing rx ba
3437 * sessions based on system constraints such as periodic BT activity that needs
3438 * to limit wlan activity (eg.sco or a2dp)."
3439 * in such cases, the intention is to limit the duration of the rx ppdu and
3440 * therefore prevent the peer device to use a-mpdu aggregation.
3442 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3443 * @ba_rx_bitmap: Bit map of open rx ba per tid
3444 * @addr: & to bssid mac address
3446 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
3450 * ieee80211_send_bar - send a BlockAckReq frame
3452 * can be used to flush pending frames from the peer's aggregation reorder
3455 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
3456 * @ra: the peer's destination address
3457 * @tid: the TID of the aggregation session
3458 * @ssn: the new starting sequence number for the receiver
3460 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn);
3462 /* Rate control API */
3465 * enum rate_control_changed - flags to indicate which parameter changed
3467 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have
3468 * changed, rate control algorithm can update its internal state if needed.
3470 enum rate_control_changed {
3471 IEEE80211_RC_HT_CHANGED = BIT(0)
3475 * struct ieee80211_tx_rate_control - rate control information for/from RC algo
3477 * @hw: The hardware the algorithm is invoked for.
3478 * @sband: The band this frame is being transmitted on.
3479 * @bss_conf: the current BSS configuration
3480 * @reported_rate: The rate control algorithm can fill this in to indicate
3481 * which rate should be reported to userspace as the current rate and
3482 * used for rate calculations in the mesh network.
3483 * @rts: whether RTS will be used for this frame because it is longer than the
3485 * @short_preamble: whether mac80211 will request short-preamble transmission
3486 * if the selected rate supports it
3487 * @max_rate_idx: user-requested maximum rate (not MCS for now)
3488 * (deprecated; this will be removed once drivers get updated to use
3490 * @rate_idx_mask: user-requested rate mask (not MCS for now)
3491 * @skb: the skb that will be transmitted, the control information in it needs
3493 * @bss: whether this frame is sent out in AP or IBSS mode
3495 struct ieee80211_tx_rate_control {
3496 struct ieee80211_hw *hw;
3497 struct ieee80211_supported_band *sband;
3498 struct ieee80211_bss_conf *bss_conf;
3499 struct sk_buff *skb;
3500 struct ieee80211_tx_rate reported_rate;
3501 bool rts, short_preamble;
3507 struct rate_control_ops {
3508 struct module *module;
3510 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir);
3511 void (*free)(void *priv);
3513 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp);
3514 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband,
3515 struct ieee80211_sta *sta, void *priv_sta);
3516 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband,
3517 struct ieee80211_sta *sta,
3518 void *priv_sta, u32 changed,
3519 enum nl80211_channel_type oper_chan_type);
3520 void (*free_sta)(void *priv, struct ieee80211_sta *sta,
3523 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
3524 struct ieee80211_sta *sta, void *priv_sta,
3525 struct sk_buff *skb);
3526 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta,
3527 struct ieee80211_tx_rate_control *txrc);
3529 void (*add_sta_debugfs)(void *priv, void *priv_sta,
3530 struct dentry *dir);
3531 void (*remove_sta_debugfs)(void *priv, void *priv_sta);
3534 static inline int rate_supported(struct ieee80211_sta *sta,
3535 enum ieee80211_band band,
3538 return (sta == NULL || sta->supp_rates[band] & BIT(index));
3542 * rate_control_send_low - helper for drivers for management/no-ack frames
3544 * Rate control algorithms that agree to use the lowest rate to
3545 * send management frames and NO_ACK data with the respective hw
3546 * retries should use this in the beginning of their mac80211 get_rate
3547 * callback. If true is returned the rate control can simply return.
3548 * If false is returned we guarantee that sta and sta and priv_sta is
3551 * Rate control algorithms wishing to do more intelligent selection of
3552 * rate for multicast/broadcast frames may choose to not use this.
3554 * @sta: &struct ieee80211_sta pointer to the target destination. Note
3555 * that this may be null.
3556 * @priv_sta: private rate control structure. This may be null.
3557 * @txrc: rate control information we sholud populate for mac80211.
3559 bool rate_control_send_low(struct ieee80211_sta *sta,
3561 struct ieee80211_tx_rate_control *txrc);
3565 rate_lowest_index(struct ieee80211_supported_band *sband,
3566 struct ieee80211_sta *sta)
3570 for (i = 0; i < sband->n_bitrates; i++)
3571 if (rate_supported(sta, sband->band, i))
3574 /* warn when we cannot find a rate. */
3577 /* and return 0 (the lowest index) */
3582 bool rate_usable_index_exists(struct ieee80211_supported_band *sband,
3583 struct ieee80211_sta *sta)
3587 for (i = 0; i < sband->n_bitrates; i++)
3588 if (rate_supported(sta, sband->band, i))
3593 int ieee80211_rate_control_register(struct rate_control_ops *ops);
3594 void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
3597 conf_is_ht20(struct ieee80211_conf *conf)
3599 return conf->channel_type == NL80211_CHAN_HT20;
3603 conf_is_ht40_minus(struct ieee80211_conf *conf)
3605 return conf->channel_type == NL80211_CHAN_HT40MINUS;
3609 conf_is_ht40_plus(struct ieee80211_conf *conf)
3611 return conf->channel_type == NL80211_CHAN_HT40PLUS;
3615 conf_is_ht40(struct ieee80211_conf *conf)
3617 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf);
3621 conf_is_ht(struct ieee80211_conf *conf)
3623 return conf->channel_type != NL80211_CHAN_NO_HT;
3626 static inline enum nl80211_iftype
3627 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p)
3631 case NL80211_IFTYPE_STATION:
3632 return NL80211_IFTYPE_P2P_CLIENT;
3633 case NL80211_IFTYPE_AP:
3634 return NL80211_IFTYPE_P2P_GO;
3642 static inline enum nl80211_iftype
3643 ieee80211_vif_type_p2p(struct ieee80211_vif *vif)
3645 return ieee80211_iftype_p2p(vif->type, vif->p2p);
3648 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
3650 int rssi_max_thold);
3652 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif);
3654 int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb);
3656 int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif,
3657 struct sk_buff *skb);
3658 #endif /* MAC80211_H */