2 * mac80211 <-> driver interface
4 * Copyright 2002-2005, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007-2008 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/wireless.h>
20 #include <linux/device.h>
21 #include <linux/ieee80211.h>
22 #include <net/wireless.h>
23 #include <net/cfg80211.h>
28 * mac80211 is the Linux stack for 802.11 hardware that implements
29 * only partial functionality in hard- or firmware. This document
30 * defines the interface between mac80211 and low-level hardware
35 * DOC: Calling mac80211 from interrupts
37 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
38 * called in hardware interrupt context. The low-level driver must not call any
39 * other functions in hardware interrupt context. If there is a need for such
40 * call, the low-level driver should first ACK the interrupt and perform the
41 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
44 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also
45 * use the non-IRQ-safe functions!
51 * If you're reading this document and not the header file itself, it will
52 * be incomplete because not all documentation has been converted yet.
58 * As a general rule, when frames are passed between mac80211 and the driver,
59 * they start with the IEEE 802.11 header and include the same octets that are
60 * sent over the air except for the FCS which should be calculated by the
63 * There are, however, various exceptions to this rule for advanced features:
65 * The first exception is for hardware encryption and decryption offload
66 * where the IV/ICV may or may not be generated in hardware.
68 * Secondly, when the hardware handles fragmentation, the frame handed to
69 * the driver from mac80211 is the MSDU, not the MPDU.
71 * Finally, for received frames, the driver is able to indicate that it has
72 * filled a radiotap header and put that in front of the frame; if it does
73 * not do so then mac80211 may add this under certain circumstances.
77 * enum ieee80211_notification_type - Low level driver notification
78 * @IEEE80211_NOTIFY_RE_ASSOC: start the re-association sequence
80 enum ieee80211_notification_types {
81 IEEE80211_NOTIFY_RE_ASSOC,
85 * enum ieee80211_max_queues - maximum number of queues
87 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
88 * @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable
89 * for A-MPDU operation.
91 enum ieee80211_max_queues {
92 IEEE80211_MAX_QUEUES = 16,
93 IEEE80211_MAX_AMPDU_QUEUES = 16,
97 * struct ieee80211_tx_queue_params - transmit queue configuration
99 * The information provided in this structure is required for QoS
100 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
102 * @aifs: arbitration interface space [0..255]
103 * @cw_min: minimum contention window [a value of the form
104 * 2^n-1 in the range 1..32767]
105 * @cw_max: maximum contention window [like @cw_min]
106 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
108 struct ieee80211_tx_queue_params {
116 * struct ieee80211_tx_queue_stats - transmit queue statistics
118 * @len: number of packets in queue
119 * @limit: queue length limit
120 * @count: number of frames sent
122 struct ieee80211_tx_queue_stats {
128 struct ieee80211_low_level_stats {
129 unsigned int dot11ACKFailureCount;
130 unsigned int dot11RTSFailureCount;
131 unsigned int dot11FCSErrorCount;
132 unsigned int dot11RTSSuccessCount;
136 * enum ieee80211_bss_change - BSS change notification flags
138 * These flags are used with the bss_info_changed() callback
139 * to indicate which BSS parameter changed.
141 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
142 * also implies a change in the AID.
143 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
144 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
145 * @BSS_CHANGED_ERP_SLOT: slot timing changed
146 * @BSS_CHANGED_HT: 802.11n parameters changed
147 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
149 enum ieee80211_bss_change {
150 BSS_CHANGED_ASSOC = 1<<0,
151 BSS_CHANGED_ERP_CTS_PROT = 1<<1,
152 BSS_CHANGED_ERP_PREAMBLE = 1<<2,
153 BSS_CHANGED_ERP_SLOT = 1<<3,
154 BSS_CHANGED_HT = 1<<4,
155 BSS_CHANGED_BASIC_RATES = 1<<5,
159 * struct ieee80211_bss_ht_conf - BSS's changing HT configuration
160 * @secondary_channel_offset: secondary channel offset, uses
161 * %IEEE80211_HT_PARAM_CHA_SEC_ values
162 * @width_40_ok: indicates that 40 MHz bandwidth may be used for TX
163 * @operation_mode: HT operation mode (like in &struct ieee80211_ht_info)
165 struct ieee80211_bss_ht_conf {
166 u8 secondary_channel_offset;
172 * struct ieee80211_bss_conf - holds the BSS's changing parameters
174 * This structure keeps information about a BSS (and an association
175 * to that BSS) that can change during the lifetime of the BSS.
177 * @assoc: association status
178 * @aid: association ID number, valid only when @assoc is true
179 * @use_cts_prot: use CTS protection
180 * @use_short_preamble: use 802.11b short preamble;
181 * if the hardware cannot handle this it must set the
182 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag
183 * @use_short_slot: use short slot time (only relevant for ERP);
184 * if the hardware cannot handle this it must set the
185 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag
186 * @dtim_period: num of beacons before the next DTIM, for PSM
187 * @timestamp: beacon timestamp
188 * @beacon_int: beacon interval
189 * @assoc_capability: capabilities taken from assoc resp
190 * @ht: BSS's HT configuration
191 * @basic_rates: bitmap of basic rates, each bit stands for an
192 * index into the rate table configured by the driver in
195 struct ieee80211_bss_conf {
196 /* association related data */
199 /* erp related data */
201 bool use_short_preamble;
205 u16 assoc_capability;
208 struct ieee80211_bss_ht_conf ht;
212 * enum mac80211_tx_control_flags - flags to describe transmission information/status
214 * These flags are used with the @flags member of &ieee80211_tx_info.
216 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame.
217 * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame
218 * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g.,
219 * for combined 802.11g / 802.11b networks)
220 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
221 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD
222 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
224 * @IEEE80211_TX_CTL_REQUEUE: TBD
225 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
226 * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD
227 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the
228 * through set_retry_limit configured long retry value
229 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
230 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
231 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number
232 * of streams when this flag is on can be extracted from antenna_sel_tx,
233 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n
234 * antennas marked use MIMO_n.
235 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame
236 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width
237 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels
238 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval
239 * @IEEE80211_TX_CTL_INJECTED: TBD
240 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
241 * because the destination STA was in powersave mode.
242 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged
243 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
244 * is for the whole aggregation.
245 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
246 * so consider using block ack request (BAR).
247 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
248 * number to this frame, taking care of not overwriting the fragment
249 * number and increasing the sequence number only when the
250 * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly
251 * assign sequence numbers to QoS-data frames but cannot do so correctly
252 * for non-QoS-data and management frames because beacons need them from
253 * that counter as well and mac80211 cannot guarantee proper sequencing.
254 * If this flag is set, the driver should instruct the hardware to
255 * assign a sequence number to the frame or assign one itself. Cf. IEEE
256 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
257 * beacons always be clear for frames without a sequence number field.
259 enum mac80211_tx_control_flags {
260 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
261 IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2),
262 IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3),
263 IEEE80211_TX_CTL_NO_ACK = BIT(4),
264 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5),
265 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6),
266 IEEE80211_TX_CTL_REQUEUE = BIT(7),
267 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8),
268 IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9),
269 IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10),
270 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12),
271 IEEE80211_TX_CTL_AMPDU = BIT(13),
272 IEEE80211_TX_CTL_OFDM_HT = BIT(14),
273 IEEE80211_TX_CTL_GREEN_FIELD = BIT(15),
274 IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16),
275 IEEE80211_TX_CTL_DUP_DATA = BIT(17),
276 IEEE80211_TX_CTL_SHORT_GI = BIT(18),
277 IEEE80211_TX_CTL_INJECTED = BIT(19),
278 IEEE80211_TX_STAT_TX_FILTERED = BIT(20),
279 IEEE80211_TX_STAT_ACK = BIT(21),
280 IEEE80211_TX_STAT_AMPDU = BIT(22),
281 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23),
282 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24),
286 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \
287 (sizeof(((struct sk_buff *)0)->cb) - 8)
288 #define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
289 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
291 /* maximum number of alternate rate retry stages */
292 #define IEEE80211_TX_MAX_ALTRATE 3
295 * struct ieee80211_tx_altrate - alternate rate selection/status
297 * @rate_idx: rate index to attempt to send with
298 * @limit: number of retries before fallback
300 struct ieee80211_tx_altrate {
306 * struct ieee80211_tx_info - skb transmit information
308 * This structure is placed in skb->cb for three uses:
309 * (1) mac80211 TX control - mac80211 tells the driver what to do
310 * (2) driver internal use (if applicable)
311 * (3) TX status information - driver tells mac80211 what happened
313 * The TX control's sta pointer is only valid during the ->tx call,
316 * @flags: transmit info flags, defined above
319 * @antenna_sel_tx: antenna to use, 0 for automatic diversity
320 * @control: union for control data
321 * @status: union for status data
322 * @driver_data: array of driver_data pointers
323 * @retry_count: number of retries
324 * @excessive_retries: set to 1 if the frame was retried many times
325 * but not acknowledged
326 * @ampdu_ack_len: number of aggregated frames.
327 * relevant only if IEEE80211_TX_STATUS_AMPDU was set.
328 * @ampdu_ack_map: block ack bit map for the aggregation.
329 * relevant only if IEEE80211_TX_STATUS_AMPDU was set.
330 * @ack_signal: signal strength of the ACK frame
332 struct ieee80211_tx_info {
333 /* common information */
343 /* NB: vif can be NULL for injected frames */
344 struct ieee80211_vif *vif;
345 struct ieee80211_key_conf *hw_key;
346 struct ieee80211_sta *sta;
347 unsigned long jiffies;
350 struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
355 struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
357 bool excessive_retries;
360 void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS];
364 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
366 return (struct ieee80211_tx_info *)skb->cb;
371 * enum mac80211_rx_flags - receive flags
373 * These flags are used with the @flag member of &struct ieee80211_rx_status.
374 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
375 * Use together with %RX_FLAG_MMIC_STRIPPED.
376 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
377 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header.
378 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
379 * verification has been done by the hardware.
380 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
381 * If this flag is set, the stack cannot do any replay detection
382 * hence the driver or hardware will have to do that.
383 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
385 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
387 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field)
388 * is valid. This is useful in monitor mode and necessary for beacon frames
389 * to enable IBSS merging.
390 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame
392 enum mac80211_rx_flags {
393 RX_FLAG_MMIC_ERROR = 1<<0,
394 RX_FLAG_DECRYPTED = 1<<1,
395 RX_FLAG_RADIOTAP = 1<<2,
396 RX_FLAG_MMIC_STRIPPED = 1<<3,
397 RX_FLAG_IV_STRIPPED = 1<<4,
398 RX_FLAG_FAILED_FCS_CRC = 1<<5,
399 RX_FLAG_FAILED_PLCP_CRC = 1<<6,
401 RX_FLAG_SHORTPRE = 1<<8
405 * struct ieee80211_rx_status - receive status
407 * The low-level driver should provide this information (the subset
408 * supported by hardware) to the 802.11 code with each received
411 * @mactime: value in microseconds of the 64-bit Time Synchronization Function
412 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
413 * @band: the active band when this frame was received
414 * @freq: frequency the radio was tuned to when receiving this frame, in MHz
415 * @signal: signal strength when receiving this frame, either in dBm, in dB or
416 * unspecified depending on the hardware capabilities flags
417 * @IEEE80211_HW_SIGNAL_*
418 * @noise: noise when receiving this frame, in dBm.
419 * @qual: overall signal quality indication, in percent (0-100).
420 * @antenna: antenna used
421 * @rate_idx: index of data rate into band's supported rates
424 struct ieee80211_rx_status {
426 enum ieee80211_band band;
437 * enum ieee80211_conf_flags - configuration flags
439 * Flags to define PHY configuration options
441 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
442 * @IEEE80211_CONF_PS: Enable 802.11 power save mode
444 enum ieee80211_conf_flags {
445 IEEE80211_CONF_RADIOTAP = (1<<0),
446 IEEE80211_CONF_PS = (1<<1),
449 /* XXX: remove all this once drivers stop trying to use it */
450 static inline int __deprecated __IEEE80211_CONF_SHORT_SLOT_TIME(void)
454 #define IEEE80211_CONF_SHORT_SLOT_TIME (__IEEE80211_CONF_SHORT_SLOT_TIME())
456 struct ieee80211_ht_conf {
461 * enum ieee80211_conf_changed - denotes which configuration changed
463 * @IEEE80211_CONF_CHANGE_RADIO_ENABLED: the value of radio_enabled changed
464 * @IEEE80211_CONF_CHANGE_BEACON_INTERVAL: the beacon interval changed
465 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
466 * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed
467 * @IEEE80211_CONF_CHANGE_PS: the PS flag changed
468 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
469 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel changed
470 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
471 * @IEEE80211_CONF_CHANGE_HT: HT configuration changed
473 enum ieee80211_conf_changed {
474 IEEE80211_CONF_CHANGE_RADIO_ENABLED = BIT(0),
475 IEEE80211_CONF_CHANGE_BEACON_INTERVAL = BIT(1),
476 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2),
477 IEEE80211_CONF_CHANGE_RADIOTAP = BIT(3),
478 IEEE80211_CONF_CHANGE_PS = BIT(4),
479 IEEE80211_CONF_CHANGE_POWER = BIT(5),
480 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6),
481 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7),
482 IEEE80211_CONF_CHANGE_HT = BIT(8),
486 * struct ieee80211_conf - configuration of the device
488 * This struct indicates how the driver shall configure the hardware.
490 * @radio_enabled: when zero, driver is required to switch off the radio.
491 * @beacon_int: beacon interval (TODO make interface config)
492 * @listen_interval: listen interval in units of beacon interval
493 * @flags: configuration flags defined above
494 * @power_level: requested transmit power (in dBm)
495 * @channel: the channel to tune to
496 * @ht: the HT configuration for the device
497 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
498 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
499 * but actually means the number of transmissions not the number of retries
500 * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
501 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
502 * number of transmissions not the number of retries
504 struct ieee80211_conf {
512 u8 long_frame_max_tx_count, short_frame_max_tx_count;
514 struct ieee80211_channel *channel;
515 struct ieee80211_ht_conf ht;
519 * struct ieee80211_vif - per-interface data
521 * Data in this structure is continually present for driver
522 * use during the life of a virtual interface.
524 * @type: type of this virtual interface
525 * @bss_conf: BSS configuration for this interface, either our own
526 * or the BSS we're associated to
527 * @drv_priv: data area for driver use, will always be aligned to
530 struct ieee80211_vif {
531 enum nl80211_iftype type;
532 struct ieee80211_bss_conf bss_conf;
534 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
537 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
539 #ifdef CONFIG_MAC80211_MESH
540 return vif->type == NL80211_IFTYPE_MESH_POINT;
546 * struct ieee80211_if_init_conf - initial configuration of an interface
548 * @vif: pointer to a driver-use per-interface structure. The pointer
549 * itself is also used for various functions including
550 * ieee80211_beacon_get() and ieee80211_get_buffered_bc().
551 * @type: one of &enum nl80211_iftype constants. Determines the type of
552 * added/removed interface.
553 * @mac_addr: pointer to MAC address of the interface. This pointer is valid
554 * until the interface is removed (i.e. it cannot be used after
555 * remove_interface() callback was called for this interface).
557 * This structure is used in add_interface() and remove_interface()
558 * callbacks of &struct ieee80211_hw.
560 * When you allow multiple interfaces to be added to your PHY, take care
561 * that the hardware can actually handle multiple MAC addresses. However,
562 * also take care that when there's no interface left with mac_addr != %NULL
563 * you remove the MAC address from the device to avoid acknowledging packets
564 * in pure monitor mode.
566 struct ieee80211_if_init_conf {
567 enum nl80211_iftype type;
568 struct ieee80211_vif *vif;
573 * enum ieee80211_if_conf_change - interface config change flags
575 * @IEEE80211_IFCC_BSSID: The BSSID changed.
576 * @IEEE80211_IFCC_SSID: The SSID changed.
577 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed
578 * (currently AP and MESH only), use ieee80211_beacon_get().
580 enum ieee80211_if_conf_change {
581 IEEE80211_IFCC_BSSID = BIT(0),
582 IEEE80211_IFCC_SSID = BIT(1),
583 IEEE80211_IFCC_BEACON = BIT(2),
587 * struct ieee80211_if_conf - configuration of an interface
589 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change.
590 * @bssid: BSSID of the network we are associated to/creating.
591 * @ssid: used (together with @ssid_len) by drivers for hardware that
592 * generate beacons independently. The pointer is valid only during the
593 * config_interface() call, so copy the value somewhere if you need
595 * @ssid_len: length of the @ssid field.
597 * This structure is passed to the config_interface() callback of
598 * &struct ieee80211_hw.
600 struct ieee80211_if_conf {
608 * enum ieee80211_key_alg - key algorithm
609 * @ALG_WEP: WEP40 or WEP104
611 * @ALG_CCMP: CCMP (AES)
613 enum ieee80211_key_alg {
620 * enum ieee80211_key_len - key length
621 * @LEN_WEP40: WEP 5-byte long key
622 * @LEN_WEP104: WEP 13-byte long key
624 enum ieee80211_key_len {
630 * enum ieee80211_key_flags - key flags
632 * These flags are used for communication about keys between the driver
633 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
635 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
636 * that the STA this key will be used with could be using QoS.
637 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
638 * driver to indicate that it requires IV generation for this
640 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
641 * the driver for a TKIP key if it requires Michael MIC
642 * generation in software.
643 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
644 * that the key is pairwise rather then a shared key.
646 enum ieee80211_key_flags {
647 IEEE80211_KEY_FLAG_WMM_STA = 1<<0,
648 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1,
649 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
650 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3,
654 * struct ieee80211_key_conf - key information
656 * This key information is given by mac80211 to the driver by
657 * the set_key() callback in &struct ieee80211_ops.
659 * @hw_key_idx: To be set by the driver, this is the key index the driver
660 * wants to be given when a frame is transmitted and needs to be
661 * encrypted in hardware.
662 * @alg: The key algorithm.
663 * @flags: key flags, see &enum ieee80211_key_flags.
664 * @keyidx: the key index (0-3)
665 * @keylen: key material length
666 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte)
668 * - Temporal Encryption Key (128 bits)
669 * - Temporal Authenticator Tx MIC Key (64 bits)
670 * - Temporal Authenticator Rx MIC Key (64 bits)
674 struct ieee80211_key_conf {
675 enum ieee80211_key_alg alg;
686 * enum set_key_cmd - key command
688 * Used with the set_key() callback in &struct ieee80211_ops, this
689 * indicates whether a key is being removed or added.
691 * @SET_KEY: a key is set
692 * @DISABLE_KEY: a key must be disabled
695 SET_KEY, DISABLE_KEY,
699 * struct ieee80211_sta - station table entry
701 * A station table entry represents a station we are possibly
702 * communicating with. Since stations are RCU-managed in
703 * mac80211, any ieee80211_sta pointer you get access to must
704 * either be protected by rcu_read_lock() explicitly or implicitly,
705 * or you must take good care to not use such a pointer after a
706 * call to your sta_notify callback that removed it.
709 * @aid: AID we assigned to the station if we're an AP
710 * @supp_rates: Bitmap of supported rates (per band)
711 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities
712 * @drv_priv: data area for driver use, will always be aligned to
713 * sizeof(void *), size is determined in hw information.
715 struct ieee80211_sta {
716 u64 supp_rates[IEEE80211_NUM_BANDS];
719 struct ieee80211_sta_ht_cap ht_cap;
722 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
726 * enum sta_notify_cmd - sta notify command
728 * Used with the sta_notify() callback in &struct ieee80211_ops, this
729 * indicates addition and removal of a station to station table.
731 * @STA_NOTIFY_ADD: a station was added to the station table
732 * @STA_NOTIFY_REMOVE: a station being removed from the station table
734 enum sta_notify_cmd {
735 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE
739 * enum ieee80211_tkip_key_type - get tkip key
741 * Used by drivers which need to get a tkip key for skb. Some drivers need a
742 * phase 1 key, others need a phase 2 key. A single function allows the driver
743 * to get the key, this enum indicates what type of key is required.
745 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key
746 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key
748 enum ieee80211_tkip_key_type {
749 IEEE80211_TKIP_P1_KEY,
750 IEEE80211_TKIP_P2_KEY,
754 * enum ieee80211_hw_flags - hardware flags
756 * These flags are used to indicate hardware capabilities to
757 * the stack. Generally, flags here should have their meaning
758 * done in a way that the simplest hardware doesn't need setting
759 * any particular flags. There are some exceptions to this rule,
760 * however, so you are advised to review these flags carefully.
762 * @IEEE80211_HW_RX_INCLUDES_FCS:
763 * Indicates that received frames passed to the stack include
764 * the FCS at the end.
766 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
767 * Some wireless LAN chipsets buffer broadcast/multicast frames
768 * for power saving stations in the hardware/firmware and others
769 * rely on the host system for such buffering. This option is used
770 * to configure the IEEE 802.11 upper layer to buffer broadcast and
771 * multicast frames when there are power saving stations so that
772 * the driver can fetch them with ieee80211_get_buffered_bc().
774 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE:
775 * Hardware is not capable of short slot operation on the 2.4 GHz band.
777 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE:
778 * Hardware is not capable of receiving frames with short preamble on
781 * @IEEE80211_HW_SIGNAL_UNSPEC:
782 * Hardware can provide signal values but we don't know its units. We
783 * expect values between 0 and @max_signal.
784 * If possible please provide dB or dBm instead.
786 * @IEEE80211_HW_SIGNAL_DB:
787 * Hardware gives signal values in dB, decibel difference from an
788 * arbitrary, fixed reference. We expect values between 0 and @max_signal.
789 * If possible please provide dBm instead.
791 * @IEEE80211_HW_SIGNAL_DBM:
792 * Hardware gives signal values in dBm, decibel difference from
793 * one milliwatt. This is the preferred method since it is standardized
794 * between different devices. @max_signal does not need to be set.
796 * @IEEE80211_HW_NOISE_DBM:
797 * Hardware can provide noise (radio interference) values in units dBm,
798 * decibel difference from one milliwatt.
800 * @IEEE80211_HW_SPECTRUM_MGMT:
801 * Hardware supports spectrum management defined in 802.11h
802 * Measurement, Channel Switch, Quieting, TPC
804 enum ieee80211_hw_flags {
805 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
806 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
807 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3,
808 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4,
809 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5,
810 IEEE80211_HW_SIGNAL_DB = 1<<6,
811 IEEE80211_HW_SIGNAL_DBM = 1<<7,
812 IEEE80211_HW_NOISE_DBM = 1<<8,
813 IEEE80211_HW_SPECTRUM_MGMT = 1<<9,
817 * struct ieee80211_hw - hardware information and state
819 * This structure contains the configuration and hardware
820 * information for an 802.11 PHY.
822 * @wiphy: This points to the &struct wiphy allocated for this
823 * 802.11 PHY. You must fill in the @perm_addr and @dev
824 * members of this structure using SET_IEEE80211_DEV()
825 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported
826 * bands (with channels, bitrates) are registered here.
828 * @conf: &struct ieee80211_conf, device configuration, don't use.
830 * @workqueue: single threaded workqueue available for driver use,
831 * allocated by mac80211 on registration and flushed when an
832 * interface is removed.
833 * NOTICE: All work performed on this workqueue should NEVER
834 * acquire the RTNL lock (i.e. Don't use the function
835 * ieee80211_iterate_active_interfaces())
837 * @priv: pointer to private area that was allocated for driver use
838 * along with this structure.
840 * @flags: hardware flags, see &enum ieee80211_hw_flags.
842 * @extra_tx_headroom: headroom to reserve in each transmit skb
843 * for use by the driver (e.g. for transmit headers.)
845 * @channel_change_time: time (in microseconds) it takes to change channels.
847 * @max_signal: Maximum value for signal (rssi) in RX information, used
848 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB
850 * @max_listen_interval: max listen interval in units of beacon interval
853 * @queues: number of available hardware transmit queues for
854 * data packets. WMM/QoS requires at least four, these
855 * queues need to have configurable access parameters.
857 * @ampdu_queues: number of available hardware transmit queues
858 * for A-MPDU packets, these have no access parameters
859 * because they're used only for A-MPDU frames. Note that
860 * mac80211 will not currently use any of the regular queues
863 * @rate_control_algorithm: rate control algorithm for this hardware.
864 * If unset (NULL), the default algorithm will be used. Must be
865 * set before calling ieee80211_register_hw().
867 * @vif_data_size: size (in bytes) of the drv_priv data area
868 * within &struct ieee80211_vif.
869 * @sta_data_size: size (in bytes) of the drv_priv data area
870 * within &struct ieee80211_sta.
872 * @max_altrates: maximum number of alternate rate retry stages
873 * @max_altrate_tries: maximum number of tries for each stage
875 struct ieee80211_hw {
876 struct ieee80211_conf conf;
878 struct workqueue_struct *workqueue;
879 const char *rate_control_algorithm;
882 unsigned int extra_tx_headroom;
883 int channel_change_time;
888 u16 max_listen_interval;
891 u8 max_altrate_tries;
895 * SET_IEEE80211_DEV - set device for 802.11 hardware
897 * @hw: the &struct ieee80211_hw to set the device for
898 * @dev: the &struct device of this 802.11 device
900 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
902 set_wiphy_dev(hw->wiphy, dev);
906 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware
908 * @hw: the &struct ieee80211_hw to set the MAC address for
909 * @addr: the address to set
911 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
913 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
916 static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw)
921 static inline int ieee80211_num_queues(struct ieee80211_hw *hw)
923 return hw->queues + hw->ampdu_queues;
926 static inline struct ieee80211_rate *
927 ieee80211_get_tx_rate(const struct ieee80211_hw *hw,
928 const struct ieee80211_tx_info *c)
930 if (WARN_ON(c->tx_rate_idx < 0))
932 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx];
935 static inline struct ieee80211_rate *
936 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
937 const struct ieee80211_tx_info *c)
939 if (c->control.rts_cts_rate_idx < 0)
941 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx];
944 static inline struct ieee80211_rate *
945 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
946 const struct ieee80211_tx_info *c, int idx)
948 if (c->control.retries[idx].rate_idx < 0)
950 return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_idx];
954 * DOC: Hardware crypto acceleration
956 * mac80211 is capable of taking advantage of many hardware
957 * acceleration designs for encryption and decryption operations.
959 * The set_key() callback in the &struct ieee80211_ops for a given
960 * device is called to enable hardware acceleration of encryption and
961 * decryption. The callback takes an @address parameter that will be
962 * the broadcast address for default keys, the other station's hardware
963 * address for individual keys or the zero address for keys that will
964 * be used only for transmission.
965 * Multiple transmission keys with the same key index may be used when
966 * VLANs are configured for an access point.
968 * The @local_address parameter will always be set to our own address,
969 * this is only relevant if you support multiple local addresses.
971 * When transmitting, the TX control data will use the @hw_key_idx
972 * selected by the driver by modifying the &struct ieee80211_key_conf
973 * pointed to by the @key parameter to the set_key() function.
975 * The set_key() call for the %SET_KEY command should return 0 if
976 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
977 * added; if you return 0 then hw_key_idx must be assigned to the
978 * hardware key index, you are free to use the full u8 range.
980 * When the cmd is %DISABLE_KEY then it must succeed.
982 * Note that it is permissible to not decrypt a frame even if a key
983 * for it has been uploaded to hardware, the stack will not make any
984 * decision based on whether a key has been uploaded or not but rather
985 * based on the receive flags.
987 * The &struct ieee80211_key_conf structure pointed to by the @key
988 * parameter is guaranteed to be valid until another call to set_key()
989 * removes it, but it can only be used as a cookie to differentiate
992 * In TKIP some HW need to be provided a phase 1 key, for RX decryption
993 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key
995 * The update_tkip_key() call updates the driver with the new phase 1 key.
996 * This happens everytime the iv16 wraps around (every 65536 packets). The
997 * set_key() call will happen only once for each key (unless the AP did
998 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is
999 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this
1000 * handler is software decryption with wrap around of iv16.
1004 * DOC: Frame filtering
1006 * mac80211 requires to see many management frames for proper
1007 * operation, and users may want to see many more frames when
1008 * in monitor mode. However, for best CPU usage and power consumption,
1009 * having as few frames as possible percolate through the stack is
1010 * desirable. Hence, the hardware should filter as much as possible.
1012 * To achieve this, mac80211 uses filter flags (see below) to tell
1013 * the driver's configure_filter() function which frames should be
1014 * passed to mac80211 and which should be filtered out.
1016 * The configure_filter() callback is invoked with the parameters
1017 * @mc_count and @mc_list for the combined multicast address list
1018 * of all virtual interfaces, @changed_flags telling which flags
1019 * were changed and @total_flags with the new flag states.
1021 * If your device has no multicast address filters your driver will
1022 * need to check both the %FIF_ALLMULTI flag and the @mc_count
1023 * parameter to see whether multicast frames should be accepted
1026 * All unsupported flags in @total_flags must be cleared.
1027 * Hardware does not support a flag if it is incapable of _passing_
1028 * the frame to the stack. Otherwise the driver must ignore
1029 * the flag, but not clear it.
1030 * You must _only_ clear the flag (announce no support for the
1031 * flag to mac80211) if you are not able to pass the packet type
1032 * to the stack (so the hardware always filters it).
1033 * So for example, you should clear @FIF_CONTROL, if your hardware
1034 * always filters control frames. If your hardware always passes
1035 * control frames to the kernel and is incapable of filtering them,
1036 * you do _not_ clear the @FIF_CONTROL flag.
1037 * This rule applies to all other FIF flags as well.
1041 * enum ieee80211_filter_flags - hardware filter flags
1043 * These flags determine what the filter in hardware should be
1044 * programmed to let through and what should not be passed to the
1045 * stack. It is always safe to pass more frames than requested,
1046 * but this has negative impact on power consumption.
1048 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
1049 * think of the BSS as your network segment and then this corresponds
1050 * to the regular ethernet device promiscuous mode.
1052 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested
1053 * by the user or if the hardware is not capable of filtering by
1054 * multicast address.
1056 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
1057 * %RX_FLAG_FAILED_FCS_CRC for them)
1059 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
1060 * the %RX_FLAG_FAILED_PLCP_CRC for them
1062 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
1063 * to the hardware that it should not filter beacons or probe responses
1064 * by BSSID. Filtering them can greatly reduce the amount of processing
1065 * mac80211 needs to do and the amount of CPU wakeups, so you should
1066 * honour this flag if possible.
1068 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then
1069 * only those addressed to this station
1071 * @FIF_OTHER_BSS: pass frames destined to other BSSes
1073 enum ieee80211_filter_flags {
1074 FIF_PROMISC_IN_BSS = 1<<0,
1075 FIF_ALLMULTI = 1<<1,
1077 FIF_PLCPFAIL = 1<<3,
1078 FIF_BCN_PRBRESP_PROMISC = 1<<4,
1080 FIF_OTHER_BSS = 1<<6,
1084 * enum ieee80211_ampdu_mlme_action - A-MPDU actions
1086 * These flags are used with the ampdu_action() callback in
1087 * &struct ieee80211_ops to indicate which action is needed.
1088 * @IEEE80211_AMPDU_RX_START: start Rx aggregation
1089 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
1090 * @IEEE80211_AMPDU_TX_START: start Tx aggregation
1091 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation
1093 enum ieee80211_ampdu_mlme_action {
1094 IEEE80211_AMPDU_RX_START,
1095 IEEE80211_AMPDU_RX_STOP,
1096 IEEE80211_AMPDU_TX_START,
1097 IEEE80211_AMPDU_TX_STOP,
1101 * struct ieee80211_ops - callbacks from mac80211 to the driver
1103 * This structure contains various callbacks that the driver may
1104 * handle or, in some cases, must handle, for example to configure
1105 * the hardware to a new channel or to transmit a frame.
1107 * @tx: Handler that 802.11 module calls for each transmitted frame.
1108 * skb contains the buffer starting from the IEEE 802.11 header.
1109 * The low-level driver should send the frame out based on
1110 * configuration in the TX control data. This handler should,
1111 * preferably, never fail and stop queues appropriately, more
1112 * importantly, however, it must never fail for A-MPDU-queues.
1113 * Must be implemented and atomic.
1115 * @start: Called before the first netdevice attached to the hardware
1116 * is enabled. This should turn on the hardware and must turn on
1117 * frame reception (for possibly enabled monitor interfaces.)
1118 * Returns negative error codes, these may be seen in userspace,
1120 * When the device is started it should not have a MAC address
1121 * to avoid acknowledging frames before a non-monitor device
1123 * Must be implemented.
1125 * @stop: Called after last netdevice attached to the hardware
1126 * is disabled. This should turn off the hardware (at least
1127 * it must turn off frame reception.)
1128 * May be called right after add_interface if that rejects
1130 * Must be implemented.
1132 * @add_interface: Called when a netdevice attached to the hardware is
1133 * enabled. Because it is not called for monitor mode devices, @open
1134 * and @stop must be implemented.
1135 * The driver should perform any initialization it needs before
1136 * the device can be enabled. The initial configuration for the
1137 * interface is given in the conf parameter.
1138 * The callback may refuse to add an interface by returning a
1139 * negative error code (which will be seen in userspace.)
1140 * Must be implemented.
1142 * @remove_interface: Notifies a driver that an interface is going down.
1143 * The @stop callback is called after this if it is the last interface
1144 * and no monitor interfaces are present.
1145 * When all interfaces are removed, the MAC address in the hardware
1146 * must be cleared so the device no longer acknowledges packets,
1147 * the mac_addr member of the conf structure is, however, set to the
1148 * MAC address of the device going away.
1149 * Hence, this callback must be implemented.
1151 * @config: Handler for configuration requests. IEEE 802.11 code calls this
1152 * function to change hardware configuration, e.g., channel.
1154 * @config_interface: Handler for configuration requests related to interfaces
1155 * (e.g. BSSID changes.)
1157 * @bss_info_changed: Handler for configuration requests related to BSS
1158 * parameters that may vary during BSS's lifespan, and may affect low
1159 * level driver (e.g. assoc/disassoc status, erp parameters).
1160 * This function should not be used if no BSS has been set, unless
1161 * for association indication. The @changed parameter indicates which
1162 * of the bss parameters has changed when a call is made.
1164 * @configure_filter: Configure the device's RX filter.
1165 * See the section "Frame filtering" for more information.
1166 * This callback must be implemented and atomic.
1168 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
1169 * must be set or cleared for a given STA. Must be atomic.
1171 * @set_key: See the section "Hardware crypto acceleration"
1172 * This callback can sleep, and is only called between add_interface
1173 * and remove_interface calls, i.e. while the interface with the
1174 * given local_address is enabled.
1176 * @update_tkip_key: See the section "Hardware crypto acceleration"
1177 * This callback will be called in the context of Rx. Called for drivers
1178 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
1180 * @hw_scan: Ask the hardware to service the scan request, no need to start
1181 * the scan state machine in stack. The scan must honour the channel
1182 * configuration done by the regulatory agent in the wiphy's registered
1183 * bands. When the scan finishes, ieee80211_scan_completed() must be
1184 * called; note that it also must be called when the scan cannot finish
1185 * because the hardware is turned off! Anything else is a bug!
1187 * @get_stats: return low-level statistics
1189 * @get_tkip_seq: If your device implements TKIP encryption in hardware this
1190 * callback should be provided to read the TKIP transmit IVs (both IV32
1191 * and IV16) for the given key from hardware.
1193 * @set_rts_threshold: Configuration of RTS threshold (if device needs it)
1195 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if
1196 * the device does fragmentation by itself; if this method is assigned then
1197 * the stack will not do fragmentation.
1199 * @sta_notify: Notifies low level driver about addition or removal
1200 * of assocaited station or AP.
1202 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
1203 * bursting) for a hardware TX queue.
1205 * @get_tx_stats: Get statistics of the current TX queue status. This is used
1206 * to get number of currently queued packets (queue length), maximum queue
1207 * size (limit), and total number of packets sent using each TX queue
1208 * (count). The 'stats' pointer points to an array that has hw->queues +
1209 * hw->ampdu_queues items.
1211 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
1212 * this is only used for IBSS mode debugging and, as such, is not a
1213 * required function. Must be atomic.
1215 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
1216 * with other STAs in the IBSS. This is only used in IBSS mode. This
1217 * function is optional if the firmware/hardware takes full care of
1218 * TSF synchronization.
1220 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
1221 * This is needed only for IBSS mode and the result of this function is
1222 * used to determine whether to reply to Probe Requests.
1224 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic.
1226 * @ampdu_action: Perform a certain A-MPDU action
1227 * The RA/TID combination determines the destination and TID we want
1228 * the ampdu action to be performed for. The action is defined through
1229 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn)
1230 * is the first frame we expect to perform the action on. notice
1231 * that TX/RX_STOP can pass NULL for this parameter.
1233 struct ieee80211_ops {
1234 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb);
1235 int (*start)(struct ieee80211_hw *hw);
1236 void (*stop)(struct ieee80211_hw *hw);
1237 int (*add_interface)(struct ieee80211_hw *hw,
1238 struct ieee80211_if_init_conf *conf);
1239 void (*remove_interface)(struct ieee80211_hw *hw,
1240 struct ieee80211_if_init_conf *conf);
1241 int (*config)(struct ieee80211_hw *hw, u32 changed);
1242 int (*config_interface)(struct ieee80211_hw *hw,
1243 struct ieee80211_vif *vif,
1244 struct ieee80211_if_conf *conf);
1245 void (*bss_info_changed)(struct ieee80211_hw *hw,
1246 struct ieee80211_vif *vif,
1247 struct ieee80211_bss_conf *info,
1249 void (*configure_filter)(struct ieee80211_hw *hw,
1250 unsigned int changed_flags,
1251 unsigned int *total_flags,
1252 int mc_count, struct dev_addr_list *mc_list);
1253 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1255 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1256 const u8 *local_address, const u8 *address,
1257 struct ieee80211_key_conf *key);
1258 void (*update_tkip_key)(struct ieee80211_hw *hw,
1259 struct ieee80211_key_conf *conf, const u8 *address,
1260 u32 iv32, u16 *phase1key);
1261 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
1262 int (*get_stats)(struct ieee80211_hw *hw,
1263 struct ieee80211_low_level_stats *stats);
1264 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
1265 u32 *iv32, u16 *iv16);
1266 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
1267 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
1268 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1269 enum sta_notify_cmd, struct ieee80211_sta *sta);
1270 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue,
1271 const struct ieee80211_tx_queue_params *params);
1272 int (*get_tx_stats)(struct ieee80211_hw *hw,
1273 struct ieee80211_tx_queue_stats *stats);
1274 u64 (*get_tsf)(struct ieee80211_hw *hw);
1275 void (*reset_tsf)(struct ieee80211_hw *hw);
1276 int (*tx_last_beacon)(struct ieee80211_hw *hw);
1277 int (*ampdu_action)(struct ieee80211_hw *hw,
1278 enum ieee80211_ampdu_mlme_action action,
1279 struct ieee80211_sta *sta, u16 tid, u16 *ssn);
1283 * ieee80211_alloc_hw - Allocate a new hardware device
1285 * This must be called once for each hardware device. The returned pointer
1286 * must be used to refer to this device when calling other functions.
1287 * mac80211 allocates a private data area for the driver pointed to by
1288 * @priv in &struct ieee80211_hw, the size of this area is given as
1291 * @priv_data_len: length of private data
1292 * @ops: callbacks for this device
1294 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1295 const struct ieee80211_ops *ops);
1298 * ieee80211_register_hw - Register hardware device
1300 * You must call this function before any other functions in
1301 * mac80211. Note that before a hardware can be registered, you
1302 * need to fill the contained wiphy's information.
1304 * @hw: the device to register as returned by ieee80211_alloc_hw()
1306 int ieee80211_register_hw(struct ieee80211_hw *hw);
1308 #ifdef CONFIG_MAC80211_LEDS
1309 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
1310 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
1311 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
1312 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw);
1315 * ieee80211_get_tx_led_name - get name of TX LED
1317 * mac80211 creates a transmit LED trigger for each wireless hardware
1318 * that can be used to drive LEDs if your driver registers a LED device.
1319 * This function returns the name (or %NULL if not configured for LEDs)
1320 * of the trigger so you can automatically link the LED device.
1322 * @hw: the hardware to get the LED trigger name for
1324 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
1326 #ifdef CONFIG_MAC80211_LEDS
1327 return __ieee80211_get_tx_led_name(hw);
1334 * ieee80211_get_rx_led_name - get name of RX LED
1336 * mac80211 creates a receive LED trigger for each wireless hardware
1337 * that can be used to drive LEDs if your driver registers a LED device.
1338 * This function returns the name (or %NULL if not configured for LEDs)
1339 * of the trigger so you can automatically link the LED device.
1341 * @hw: the hardware to get the LED trigger name for
1343 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
1345 #ifdef CONFIG_MAC80211_LEDS
1346 return __ieee80211_get_rx_led_name(hw);
1353 * ieee80211_get_assoc_led_name - get name of association LED
1355 * mac80211 creates a association LED trigger for each wireless hardware
1356 * that can be used to drive LEDs if your driver registers a LED device.
1357 * This function returns the name (or %NULL if not configured for LEDs)
1358 * of the trigger so you can automatically link the LED device.
1360 * @hw: the hardware to get the LED trigger name for
1362 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
1364 #ifdef CONFIG_MAC80211_LEDS
1365 return __ieee80211_get_assoc_led_name(hw);
1372 * ieee80211_get_radio_led_name - get name of radio LED
1374 * mac80211 creates a radio change LED trigger for each wireless hardware
1375 * that can be used to drive LEDs if your driver registers a LED device.
1376 * This function returns the name (or %NULL if not configured for LEDs)
1377 * of the trigger so you can automatically link the LED device.
1379 * @hw: the hardware to get the LED trigger name for
1381 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
1383 #ifdef CONFIG_MAC80211_LEDS
1384 return __ieee80211_get_radio_led_name(hw);
1391 * ieee80211_unregister_hw - Unregister a hardware device
1393 * This function instructs mac80211 to free allocated resources
1394 * and unregister netdevices from the networking subsystem.
1396 * @hw: the hardware to unregister
1398 void ieee80211_unregister_hw(struct ieee80211_hw *hw);
1401 * ieee80211_free_hw - free hardware descriptor
1403 * This function frees everything that was allocated, including the
1404 * private data for the driver. You must call ieee80211_unregister_hw()
1405 * before calling this function.
1407 * @hw: the hardware to free
1409 void ieee80211_free_hw(struct ieee80211_hw *hw);
1411 /* trick to avoid symbol clashes with the ieee80211 subsystem */
1412 void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
1413 struct ieee80211_rx_status *status);
1416 * ieee80211_rx - receive frame
1418 * Use this function to hand received frames to mac80211. The receive
1419 * buffer in @skb must start with an IEEE 802.11 header or a radiotap
1420 * header if %RX_FLAG_RADIOTAP is set in the @status flags.
1422 * This function may not be called in IRQ context. Calls to this function
1423 * for a single hardware must be synchronized against each other. Calls
1424 * to this function and ieee80211_rx_irqsafe() may not be mixed for a
1427 * @hw: the hardware this frame came in on
1428 * @skb: the buffer to receive, owned by mac80211 after this call
1429 * @status: status of this frame; the status pointer need not be valid
1430 * after this function returns
1432 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
1433 struct ieee80211_rx_status *status)
1435 __ieee80211_rx(hw, skb, status);
1439 * ieee80211_rx_irqsafe - receive frame
1441 * Like ieee80211_rx() but can be called in IRQ context
1442 * (internally defers to a tasklet.)
1444 * Calls to this function and ieee80211_rx() may not be mixed for a
1447 * @hw: the hardware this frame came in on
1448 * @skb: the buffer to receive, owned by mac80211 after this call
1449 * @status: status of this frame; the status pointer need not be valid
1450 * after this function returns and is not freed by mac80211,
1451 * it is recommended that it points to a stack area
1453 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
1454 struct sk_buff *skb,
1455 struct ieee80211_rx_status *status);
1458 * ieee80211_tx_status - transmit status callback
1460 * Call this function for all transmitted frames after they have been
1461 * transmitted. It is permissible to not call this function for
1462 * multicast frames but this can affect statistics.
1464 * This function may not be called in IRQ context. Calls to this function
1465 * for a single hardware must be synchronized against each other. Calls
1466 * to this function and ieee80211_tx_status_irqsafe() may not be mixed
1467 * for a single hardware.
1469 * @hw: the hardware the frame was transmitted by
1470 * @skb: the frame that was transmitted, owned by mac80211 after this call
1472 void ieee80211_tx_status(struct ieee80211_hw *hw,
1473 struct sk_buff *skb);
1476 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback
1478 * Like ieee80211_tx_status() but can be called in IRQ context
1479 * (internally defers to a tasklet.)
1481 * Calls to this function and ieee80211_tx_status() may not be mixed for a
1484 * @hw: the hardware the frame was transmitted by
1485 * @skb: the frame that was transmitted, owned by mac80211 after this call
1487 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1488 struct sk_buff *skb);
1491 * ieee80211_beacon_get - beacon generation function
1492 * @hw: pointer obtained from ieee80211_alloc_hw().
1493 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1495 * If the beacon frames are generated by the host system (i.e., not in
1496 * hardware/firmware), the low-level driver uses this function to receive
1497 * the next beacon frame from the 802.11 code. The low-level is responsible
1498 * for calling this function before beacon data is needed (e.g., based on
1499 * hardware interrupt). Returned skb is used only once and low-level driver
1500 * is responsible of freeing it.
1502 struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
1503 struct ieee80211_vif *vif);
1506 * ieee80211_rts_get - RTS frame generation function
1507 * @hw: pointer obtained from ieee80211_alloc_hw().
1508 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1509 * @frame: pointer to the frame that is going to be protected by the RTS.
1510 * @frame_len: the frame length (in octets).
1511 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1512 * @rts: The buffer where to store the RTS frame.
1514 * If the RTS frames are generated by the host system (i.e., not in
1515 * hardware/firmware), the low-level driver uses this function to receive
1516 * the next RTS frame from the 802.11 code. The low-level is responsible
1517 * for calling this function before and RTS frame is needed.
1519 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1520 const void *frame, size_t frame_len,
1521 const struct ieee80211_tx_info *frame_txctl,
1522 struct ieee80211_rts *rts);
1525 * ieee80211_rts_duration - Get the duration field for an RTS frame
1526 * @hw: pointer obtained from ieee80211_alloc_hw().
1527 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1528 * @frame_len: the length of the frame that is going to be protected by the RTS.
1529 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1531 * If the RTS is generated in firmware, but the host system must provide
1532 * the duration field, the low-level driver uses this function to receive
1533 * the duration field value in little-endian byteorder.
1535 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
1536 struct ieee80211_vif *vif, size_t frame_len,
1537 const struct ieee80211_tx_info *frame_txctl);
1540 * ieee80211_ctstoself_get - CTS-to-self frame generation function
1541 * @hw: pointer obtained from ieee80211_alloc_hw().
1542 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1543 * @frame: pointer to the frame that is going to be protected by the CTS-to-self.
1544 * @frame_len: the frame length (in octets).
1545 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1546 * @cts: The buffer where to store the CTS-to-self frame.
1548 * If the CTS-to-self frames are generated by the host system (i.e., not in
1549 * hardware/firmware), the low-level driver uses this function to receive
1550 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible
1551 * for calling this function before and CTS-to-self frame is needed.
1553 void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
1554 struct ieee80211_vif *vif,
1555 const void *frame, size_t frame_len,
1556 const struct ieee80211_tx_info *frame_txctl,
1557 struct ieee80211_cts *cts);
1560 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
1561 * @hw: pointer obtained from ieee80211_alloc_hw().
1562 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1563 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
1564 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1566 * If the CTS-to-self is generated in firmware, but the host system must provide
1567 * the duration field, the low-level driver uses this function to receive
1568 * the duration field value in little-endian byteorder.
1570 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
1571 struct ieee80211_vif *vif,
1573 const struct ieee80211_tx_info *frame_txctl);
1576 * ieee80211_generic_frame_duration - Calculate the duration field for a frame
1577 * @hw: pointer obtained from ieee80211_alloc_hw().
1578 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1579 * @frame_len: the length of the frame.
1580 * @rate: the rate at which the frame is going to be transmitted.
1582 * Calculate the duration field of some generic frame, given its
1583 * length and transmission rate (in 100kbps).
1585 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
1586 struct ieee80211_vif *vif,
1588 struct ieee80211_rate *rate);
1591 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
1592 * @hw: pointer as obtained from ieee80211_alloc_hw().
1593 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1595 * Function for accessing buffered broadcast and multicast frames. If
1596 * hardware/firmware does not implement buffering of broadcast/multicast
1597 * frames when power saving is used, 802.11 code buffers them in the host
1598 * memory. The low-level driver uses this function to fetch next buffered
1599 * frame. In most cases, this is used when generating beacon frame. This
1600 * function returns a pointer to the next buffered skb or NULL if no more
1601 * buffered frames are available.
1603 * Note: buffered frames are returned only after DTIM beacon frame was
1604 * generated with ieee80211_beacon_get() and the low-level driver must thus
1605 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
1606 * NULL if the previous generated beacon was not DTIM, so the low-level driver
1607 * does not need to check for DTIM beacons separately and should be able to
1608 * use common code for all beacons.
1611 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
1614 * ieee80211_get_hdrlen_from_skb - get header length from data
1616 * Given an skb with a raw 802.11 header at the data pointer this function
1617 * returns the 802.11 header length in bytes (not including encryption
1618 * headers). If the data in the sk_buff is too short to contain a valid 802.11
1619 * header the function returns 0.
1623 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
1626 * ieee80211_hdrlen - get header length in bytes from frame control
1627 * @fc: frame control field in little-endian format
1629 unsigned int ieee80211_hdrlen(__le16 fc);
1632 * ieee80211_get_tkip_key - get a TKIP rc4 for skb
1634 * This function computes a TKIP rc4 key for an skb. It computes
1635 * a phase 1 key if needed (iv16 wraps around). This function is to
1636 * be used by drivers which can do HW encryption but need to compute
1637 * to phase 1/2 key in SW.
1639 * @keyconf: the parameter passed with the set key
1640 * @skb: the skb for which the key is needed
1642 * @key: a buffer to which the key will be written
1644 void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
1645 struct sk_buff *skb,
1646 enum ieee80211_tkip_key_type type, u8 *key);
1648 * ieee80211_wake_queue - wake specific queue
1649 * @hw: pointer as obtained from ieee80211_alloc_hw().
1650 * @queue: queue number (counted from zero).
1652 * Drivers should use this function instead of netif_wake_queue.
1654 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
1657 * ieee80211_stop_queue - stop specific queue
1658 * @hw: pointer as obtained from ieee80211_alloc_hw().
1659 * @queue: queue number (counted from zero).
1661 * Drivers should use this function instead of netif_stop_queue.
1663 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
1666 * ieee80211_queue_stopped - test status of the queue
1667 * @hw: pointer as obtained from ieee80211_alloc_hw().
1668 * @queue: queue number (counted from zero).
1670 * Drivers should use this function instead of netif_stop_queue.
1673 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue);
1676 * ieee80211_stop_queues - stop all queues
1677 * @hw: pointer as obtained from ieee80211_alloc_hw().
1679 * Drivers should use this function instead of netif_stop_queue.
1681 void ieee80211_stop_queues(struct ieee80211_hw *hw);
1684 * ieee80211_wake_queues - wake all queues
1685 * @hw: pointer as obtained from ieee80211_alloc_hw().
1687 * Drivers should use this function instead of netif_wake_queue.
1689 void ieee80211_wake_queues(struct ieee80211_hw *hw);
1692 * ieee80211_scan_completed - completed hardware scan
1694 * When hardware scan offload is used (i.e. the hw_scan() callback is
1695 * assigned) this function needs to be called by the driver to notify
1696 * mac80211 that the scan finished.
1698 * @hw: the hardware that finished the scan
1700 void ieee80211_scan_completed(struct ieee80211_hw *hw);
1703 * ieee80211_iterate_active_interfaces - iterate active interfaces
1705 * This function iterates over the interfaces associated with a given
1706 * hardware that are currently active and calls the callback for them.
1707 * This function allows the iterator function to sleep, when the iterator
1708 * function is atomic @ieee80211_iterate_active_interfaces_atomic can
1711 * @hw: the hardware struct of which the interfaces should be iterated over
1712 * @iterator: the iterator function to call
1713 * @data: first argument of the iterator function
1715 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
1716 void (*iterator)(void *data, u8 *mac,
1717 struct ieee80211_vif *vif),
1721 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces
1723 * This function iterates over the interfaces associated with a given
1724 * hardware that are currently active and calls the callback for them.
1725 * This function requires the iterator callback function to be atomic,
1726 * if that is not desired, use @ieee80211_iterate_active_interfaces instead.
1728 * @hw: the hardware struct of which the interfaces should be iterated over
1729 * @iterator: the iterator function to call, cannot sleep
1730 * @data: first argument of the iterator function
1732 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw,
1733 void (*iterator)(void *data,
1735 struct ieee80211_vif *vif),
1739 * ieee80211_start_tx_ba_session - Start a tx Block Ack session.
1740 * @hw: pointer as obtained from ieee80211_alloc_hw().
1741 * @ra: receiver address of the BA session recipient
1742 * @tid: the TID to BA on.
1744 * Return: success if addBA request was sent, failure otherwise
1746 * Although mac80211/low level driver/user space application can estimate
1747 * the need to start aggregation on a certain RA/TID, the session level
1748 * will be managed by the mac80211.
1750 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid);
1753 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate.
1754 * @hw: pointer as obtained from ieee80211_alloc_hw().
1755 * @ra: receiver address of the BA session recipient.
1756 * @tid: the TID to BA on.
1758 * This function must be called by low level driver once it has
1759 * finished with preparations for the BA session.
1761 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid);
1764 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
1765 * @hw: pointer as obtained from ieee80211_alloc_hw().
1766 * @ra: receiver address of the BA session recipient.
1767 * @tid: the TID to BA on.
1769 * This function must be called by low level driver once it has
1770 * finished with preparations for the BA session.
1771 * This version of the function is IRQ-safe.
1773 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
1777 * ieee80211_stop_tx_ba_session - Stop a Block Ack session.
1778 * @hw: pointer as obtained from ieee80211_alloc_hw().
1779 * @ra: receiver address of the BA session recipient
1780 * @tid: the TID to stop BA.
1781 * @initiator: if indicates initiator DELBA frame will be sent.
1783 * Return: error if no sta with matching da found, success otherwise
1785 * Although mac80211/low level driver/user space application can estimate
1786 * the need to stop aggregation on a certain RA/TID, the session level
1787 * will be managed by the mac80211.
1789 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
1791 enum ieee80211_back_parties initiator);
1794 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate.
1795 * @hw: pointer as obtained from ieee80211_alloc_hw().
1796 * @ra: receiver address of the BA session recipient.
1797 * @tid: the desired TID to BA on.
1799 * This function must be called by low level driver once it has
1800 * finished with preparations for the BA session tear down.
1802 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid);
1805 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
1806 * @hw: pointer as obtained from ieee80211_alloc_hw().
1807 * @ra: receiver address of the BA session recipient.
1808 * @tid: the desired TID to BA on.
1810 * This function must be called by low level driver once it has
1811 * finished with preparations for the BA session tear down.
1812 * This version of the function is IRQ-safe.
1814 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra,
1818 * ieee80211_notify_mac - low level driver notification
1819 * @hw: pointer as obtained from ieee80211_alloc_hw().
1820 * @notif_type: enum ieee80211_notification_types
1822 * This function must be called by low level driver to inform mac80211 of
1823 * low level driver status change or force mac80211 to re-assoc for low
1824 * level driver internal error that require re-assoc.
1826 void ieee80211_notify_mac(struct ieee80211_hw *hw,
1827 enum ieee80211_notification_types notif_type);
1830 * ieee80211_find_sta - find a station
1832 * @hw: pointer as obtained from ieee80211_alloc_hw()
1833 * @addr: station's address
1835 * This function must be called under RCU lock and the
1836 * resulting pointer is only valid under RCU lock as well.
1838 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
1842 /* Rate control API */
1844 * struct rate_selection - rate information for/from rate control algorithms
1846 * @rate_idx: selected transmission rate index
1847 * @nonerp_idx: Non-ERP rate to use instead if ERP cannot be used
1848 * @probe_idx: rate for probing (or -1)
1849 * @max_rate_idx: maximum rate index that can be used, this is
1850 * input to the algorithm and will be enforced
1852 struct rate_selection {
1853 s8 rate_idx, nonerp_idx, probe_idx, max_rate_idx;
1856 struct rate_control_ops {
1857 struct module *module;
1859 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir);
1860 void (*clear)(void *priv);
1861 void (*free)(void *priv);
1863 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp);
1864 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband,
1865 struct ieee80211_sta *sta, void *priv_sta);
1866 void (*free_sta)(void *priv, struct ieee80211_sta *sta,
1869 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
1870 struct ieee80211_sta *sta, void *priv_sta,
1871 struct sk_buff *skb);
1872 void (*get_rate)(void *priv, struct ieee80211_supported_band *sband,
1873 struct ieee80211_sta *sta, void *priv_sta,
1874 struct sk_buff *skb,
1875 struct rate_selection *sel);
1877 void (*add_sta_debugfs)(void *priv, void *priv_sta,
1878 struct dentry *dir);
1879 void (*remove_sta_debugfs)(void *priv, void *priv_sta);
1882 static inline int rate_supported(struct ieee80211_sta *sta,
1883 enum ieee80211_band band,
1886 return (sta == NULL || sta->supp_rates[band] & BIT(index));
1890 rate_lowest_index(struct ieee80211_supported_band *sband,
1891 struct ieee80211_sta *sta)
1895 for (i = 0; i < sband->n_bitrates; i++)
1896 if (rate_supported(sta, sband->band, i))
1899 /* warn when we cannot find a rate. */
1906 int ieee80211_rate_control_register(struct rate_control_ops *ops);
1907 void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
1909 #endif /* MAC80211_H */