2 * mac80211 <-> driver interface
4 * Copyright 2002-2005, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 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 * struct ieee80211_ht_bss_info - describing BSS's HT characteristics
87 * This structure describes most essential parameters needed
88 * to describe 802.11n HT characteristics in a BSS.
90 * @primary_channel: channel number of primery channel
91 * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width)
92 * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection)
94 struct ieee80211_ht_bss_info
{
96 u8 bss_cap
; /* use IEEE80211_HT_IE_CHA_ */
97 u8 bss_op_mode
; /* use IEEE80211_HT_IE_ */
101 * enum ieee80211_max_queues - maximum number of queues
103 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
104 * @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable
105 * for A-MPDU operation.
107 enum ieee80211_max_queues
{
108 IEEE80211_MAX_QUEUES
= 16,
109 IEEE80211_MAX_AMPDU_QUEUES
= 16,
113 * struct ieee80211_tx_queue_params - transmit queue configuration
115 * The information provided in this structure is required for QoS
116 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
118 * @aifs: arbitration interface space [0..255]
119 * @cw_min: minimum contention window [a value of the form
120 * 2^n-1 in the range 1..32767]
121 * @cw_max: maximum contention window [like @cw_min]
122 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
124 struct ieee80211_tx_queue_params
{
132 * struct ieee80211_tx_queue_stats - transmit queue statistics
134 * @len: number of packets in queue
135 * @limit: queue length limit
136 * @count: number of frames sent
138 struct ieee80211_tx_queue_stats
{
144 struct ieee80211_low_level_stats
{
145 unsigned int dot11ACKFailureCount
;
146 unsigned int dot11RTSFailureCount
;
147 unsigned int dot11FCSErrorCount
;
148 unsigned int dot11RTSSuccessCount
;
152 * enum ieee80211_bss_change - BSS change notification flags
154 * These flags are used with the bss_info_changed() callback
155 * to indicate which BSS parameter changed.
157 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
158 * also implies a change in the AID.
159 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
160 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
161 * @BSS_CHANGED_ERP_SLOT: slot timing changed
162 * @BSS_CHANGED_HT: 802.11n parameters changed
163 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
165 enum ieee80211_bss_change
{
166 BSS_CHANGED_ASSOC
= 1<<0,
167 BSS_CHANGED_ERP_CTS_PROT
= 1<<1,
168 BSS_CHANGED_ERP_PREAMBLE
= 1<<2,
169 BSS_CHANGED_ERP_SLOT
= 1<<3,
170 BSS_CHANGED_HT
= 1<<4,
171 BSS_CHANGED_BASIC_RATES
= 1<<5,
175 * struct ieee80211_bss_conf - holds the BSS's changing parameters
177 * This structure keeps information about a BSS (and an association
178 * to that BSS) that can change during the lifetime of the BSS.
180 * @assoc: association status
181 * @aid: association ID number, valid only when @assoc is true
182 * @use_cts_prot: use CTS protection
183 * @use_short_preamble: use 802.11b short preamble;
184 * if the hardware cannot handle this it must set the
185 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag
186 * @use_short_slot: use short slot time (only relevant for ERP);
187 * if the hardware cannot handle this it must set the
188 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag
189 * @dtim_period: num of beacons before the next DTIM, for PSM
190 * @timestamp: beacon timestamp
191 * @beacon_int: beacon interval
192 * @assoc_capability: capabilities taken from assoc resp
193 * @assoc_ht: association in HT mode
194 * @ht_cap: ht capabilities
195 * @ht_bss_conf: ht extended capabilities
196 * @basic_rates: bitmap of basic rates, each bit stands for an
197 * index into the rate table configured by the driver in
200 struct ieee80211_bss_conf
{
201 /* association related data */
204 /* erp related data */
206 bool use_short_preamble
;
210 u16 assoc_capability
;
213 /* ht related data */
215 struct ieee80211_sta_ht_cap
*ht_cap
;
216 struct ieee80211_ht_bss_info
*ht_bss_conf
;
220 * enum mac80211_tx_control_flags - flags to describe transmission information/status
222 * These flags are used with the @flags member of &ieee80211_tx_info.
224 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame.
225 * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame
226 * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g.,
227 * for combined 802.11g / 802.11b networks)
228 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
229 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD
230 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
232 * @IEEE80211_TX_CTL_REQUEUE: TBD
233 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
234 * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD
235 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the
236 * through set_retry_limit configured long retry value
237 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
238 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
239 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number
240 * of streams when this flag is on can be extracted from antenna_sel_tx,
241 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n
242 * antennas marked use MIMO_n.
243 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame
244 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width
245 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels
246 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval
247 * @IEEE80211_TX_CTL_INJECTED: TBD
248 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
249 * because the destination STA was in powersave mode.
250 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged
251 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
252 * is for the whole aggregation.
253 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
254 * so consider using block ack request (BAR).
255 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
256 * number to this frame, taking care of not overwriting the fragment
257 * number and increasing the sequence number only when the
258 * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly
259 * assign sequence numbers to QoS-data frames but cannot do so correctly
260 * for non-QoS-data and management frames because beacons need them from
261 * that counter as well and mac80211 cannot guarantee proper sequencing.
262 * If this flag is set, the driver should instruct the hardware to
263 * assign a sequence number to the frame or assign one itself. Cf. IEEE
264 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
265 * beacons always be clear for frames without a sequence number field.
267 enum mac80211_tx_control_flags
{
268 IEEE80211_TX_CTL_REQ_TX_STATUS
= BIT(0),
269 IEEE80211_TX_CTL_USE_RTS_CTS
= BIT(2),
270 IEEE80211_TX_CTL_USE_CTS_PROTECT
= BIT(3),
271 IEEE80211_TX_CTL_NO_ACK
= BIT(4),
272 IEEE80211_TX_CTL_RATE_CTRL_PROBE
= BIT(5),
273 IEEE80211_TX_CTL_CLEAR_PS_FILT
= BIT(6),
274 IEEE80211_TX_CTL_REQUEUE
= BIT(7),
275 IEEE80211_TX_CTL_FIRST_FRAGMENT
= BIT(8),
276 IEEE80211_TX_CTL_SHORT_PREAMBLE
= BIT(9),
277 IEEE80211_TX_CTL_LONG_RETRY_LIMIT
= BIT(10),
278 IEEE80211_TX_CTL_SEND_AFTER_DTIM
= BIT(12),
279 IEEE80211_TX_CTL_AMPDU
= BIT(13),
280 IEEE80211_TX_CTL_OFDM_HT
= BIT(14),
281 IEEE80211_TX_CTL_GREEN_FIELD
= BIT(15),
282 IEEE80211_TX_CTL_40_MHZ_WIDTH
= BIT(16),
283 IEEE80211_TX_CTL_DUP_DATA
= BIT(17),
284 IEEE80211_TX_CTL_SHORT_GI
= BIT(18),
285 IEEE80211_TX_CTL_INJECTED
= BIT(19),
286 IEEE80211_TX_STAT_TX_FILTERED
= BIT(20),
287 IEEE80211_TX_STAT_ACK
= BIT(21),
288 IEEE80211_TX_STAT_AMPDU
= BIT(22),
289 IEEE80211_TX_STAT_AMPDU_NO_BACK
= BIT(23),
290 IEEE80211_TX_CTL_ASSIGN_SEQ
= BIT(24),
294 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \
295 (sizeof(((struct sk_buff *)0)->cb) - 8)
296 #define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
297 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
299 /* maximum number of alternate rate retry stages */
300 #define IEEE80211_TX_MAX_ALTRATE 3
303 * struct ieee80211_tx_altrate - alternate rate selection/status
305 * @rate_idx: rate index to attempt to send with
306 * @limit: number of retries before fallback
308 struct ieee80211_tx_altrate
{
314 * struct ieee80211_tx_info - skb transmit information
316 * This structure is placed in skb->cb for three uses:
317 * (1) mac80211 TX control - mac80211 tells the driver what to do
318 * (2) driver internal use (if applicable)
319 * (3) TX status information - driver tells mac80211 what happened
321 * The TX control's sta pointer is only valid during the ->tx call,
324 * @flags: transmit info flags, defined above
327 * @antenna_sel_tx: antenna to use, 0 for automatic diversity
328 * @control: union for control data
329 * @status: union for status data
330 * @driver_data: array of driver_data pointers
331 * @retry_count: number of retries
332 * @excessive_retries: set to 1 if the frame was retried many times
333 * but not acknowledged
334 * @ampdu_ack_len: number of aggregated frames.
335 * relevant only if IEEE80211_TX_STATUS_AMPDU was set.
336 * @ampdu_ack_map: block ack bit map for the aggregation.
337 * relevant only if IEEE80211_TX_STATUS_AMPDU was set.
338 * @ack_signal: signal strength of the ACK frame
340 struct ieee80211_tx_info
{
341 /* common information */
351 /* NB: vif can be NULL for injected frames */
352 struct ieee80211_vif
*vif
;
353 struct ieee80211_key_conf
*hw_key
;
354 struct ieee80211_sta
*sta
;
355 unsigned long jiffies
;
358 struct ieee80211_tx_altrate retries
[IEEE80211_TX_MAX_ALTRATE
];
363 struct ieee80211_tx_altrate retries
[IEEE80211_TX_MAX_ALTRATE
+ 1];
365 bool excessive_retries
;
368 void *driver_data
[IEEE80211_TX_INFO_DRIVER_DATA_PTRS
];
372 static inline struct ieee80211_tx_info
*IEEE80211_SKB_CB(struct sk_buff
*skb
)
374 return (struct ieee80211_tx_info
*)skb
->cb
;
379 * enum mac80211_rx_flags - receive flags
381 * These flags are used with the @flag member of &struct ieee80211_rx_status.
382 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
383 * Use together with %RX_FLAG_MMIC_STRIPPED.
384 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
385 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header.
386 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
387 * verification has been done by the hardware.
388 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
389 * If this flag is set, the stack cannot do any replay detection
390 * hence the driver or hardware will have to do that.
391 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
393 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
395 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field)
396 * is valid. This is useful in monitor mode and necessary for beacon frames
397 * to enable IBSS merging.
398 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame
400 enum mac80211_rx_flags
{
401 RX_FLAG_MMIC_ERROR
= 1<<0,
402 RX_FLAG_DECRYPTED
= 1<<1,
403 RX_FLAG_RADIOTAP
= 1<<2,
404 RX_FLAG_MMIC_STRIPPED
= 1<<3,
405 RX_FLAG_IV_STRIPPED
= 1<<4,
406 RX_FLAG_FAILED_FCS_CRC
= 1<<5,
407 RX_FLAG_FAILED_PLCP_CRC
= 1<<6,
409 RX_FLAG_SHORTPRE
= 1<<8
413 * struct ieee80211_rx_status - receive status
415 * The low-level driver should provide this information (the subset
416 * supported by hardware) to the 802.11 code with each received
419 * @mactime: value in microseconds of the 64-bit Time Synchronization Function
420 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
421 * @band: the active band when this frame was received
422 * @freq: frequency the radio was tuned to when receiving this frame, in MHz
423 * @signal: signal strength when receiving this frame, either in dBm, in dB or
424 * unspecified depending on the hardware capabilities flags
425 * @IEEE80211_HW_SIGNAL_*
426 * @noise: noise when receiving this frame, in dBm.
427 * @qual: overall signal quality indication, in percent (0-100).
428 * @antenna: antenna used
429 * @rate_idx: index of data rate into band's supported rates
432 struct ieee80211_rx_status
{
434 enum ieee80211_band band
;
445 * enum ieee80211_conf_flags - configuration flags
447 * Flags to define PHY configuration options
449 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
450 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported)
451 * @IEEE80211_CONF_PS: Enable 802.11 power save mode
453 enum ieee80211_conf_flags
{
454 IEEE80211_CONF_RADIOTAP
= (1<<0),
455 IEEE80211_CONF_SUPPORT_HT_MODE
= (1<<1),
456 IEEE80211_CONF_PS
= (1<<2),
459 /* XXX: remove all this once drivers stop trying to use it */
460 static inline int __deprecated
__IEEE80211_CONF_SHORT_SLOT_TIME(void)
464 #define IEEE80211_CONF_SHORT_SLOT_TIME (__IEEE80211_CONF_SHORT_SLOT_TIME())
467 * enum ieee80211_conf_changed - denotes which configuration changed
469 * @IEEE80211_CONF_CHANGE_RADIO_ENABLED: the value of radio_enabled changed
470 * @IEEE80211_CONF_CHANGE_BEACON_INTERVAL: the beacon interval changed
471 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
472 * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed
473 * @IEEE80211_CONF_CHANGE_PS: the PS flag changed
474 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
475 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel changed
476 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
478 enum ieee80211_conf_changed
{
479 IEEE80211_CONF_CHANGE_RADIO_ENABLED
= BIT(0),
480 IEEE80211_CONF_CHANGE_BEACON_INTERVAL
= BIT(1),
481 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL
= BIT(2),
482 IEEE80211_CONF_CHANGE_RADIOTAP
= BIT(3),
483 IEEE80211_CONF_CHANGE_PS
= BIT(4),
484 IEEE80211_CONF_CHANGE_POWER
= BIT(5),
485 IEEE80211_CONF_CHANGE_CHANNEL
= BIT(6),
486 IEEE80211_CONF_CHANGE_RETRY_LIMITS
= BIT(7),
490 * struct ieee80211_conf - configuration of the device
492 * This struct indicates how the driver shall configure the hardware.
494 * @radio_enabled: when zero, driver is required to switch off the radio.
495 * @beacon_int: beacon interval (TODO make interface config)
496 * @listen_interval: listen interval in units of beacon interval
497 * @flags: configuration flags defined above
498 * @power_level: requested transmit power (in dBm)
499 * @ht_cap: describes current self configuration of 802.11n HT capabilities
500 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters
501 * @channel: the channel to tune to
502 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
503 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
504 * but actually means the number of transmissions not the number of retries
505 * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
506 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
507 * number of transmissions not the number of retries
509 struct ieee80211_conf
{
517 u8 long_frame_max_tx_count
, short_frame_max_tx_count
;
519 struct ieee80211_channel
*channel
;
521 struct ieee80211_sta_ht_cap ht_cap
;
522 struct ieee80211_ht_bss_info ht_bss_conf
;
526 * struct ieee80211_vif - per-interface data
528 * Data in this structure is continually present for driver
529 * use during the life of a virtual interface.
531 * @type: type of this virtual interface
532 * @bss_conf: BSS configuration for this interface, either our own
533 * or the BSS we're associated to
534 * @drv_priv: data area for driver use, will always be aligned to
537 struct ieee80211_vif
{
538 enum nl80211_iftype type
;
539 struct ieee80211_bss_conf bss_conf
;
541 u8 drv_priv
[0] __attribute__((__aligned__(sizeof(void *))));
544 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif
*vif
)
546 #ifdef CONFIG_MAC80211_MESH
547 return vif
->type
== NL80211_IFTYPE_MESH_POINT
;
553 * struct ieee80211_if_init_conf - initial configuration of an interface
555 * @vif: pointer to a driver-use per-interface structure. The pointer
556 * itself is also used for various functions including
557 * ieee80211_beacon_get() and ieee80211_get_buffered_bc().
558 * @type: one of &enum nl80211_iftype constants. Determines the type of
559 * added/removed interface.
560 * @mac_addr: pointer to MAC address of the interface. This pointer is valid
561 * until the interface is removed (i.e. it cannot be used after
562 * remove_interface() callback was called for this interface).
564 * This structure is used in add_interface() and remove_interface()
565 * callbacks of &struct ieee80211_hw.
567 * When you allow multiple interfaces to be added to your PHY, take care
568 * that the hardware can actually handle multiple MAC addresses. However,
569 * also take care that when there's no interface left with mac_addr != %NULL
570 * you remove the MAC address from the device to avoid acknowledging packets
571 * in pure monitor mode.
573 struct ieee80211_if_init_conf
{
574 enum nl80211_iftype type
;
575 struct ieee80211_vif
*vif
;
580 * enum ieee80211_if_conf_change - interface config change flags
582 * @IEEE80211_IFCC_BSSID: The BSSID changed.
583 * @IEEE80211_IFCC_SSID: The SSID changed.
584 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed
585 * (currently AP and MESH only), use ieee80211_beacon_get().
587 enum ieee80211_if_conf_change
{
588 IEEE80211_IFCC_BSSID
= BIT(0),
589 IEEE80211_IFCC_SSID
= BIT(1),
590 IEEE80211_IFCC_BEACON
= BIT(2),
594 * struct ieee80211_if_conf - configuration of an interface
596 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change.
597 * @bssid: BSSID of the network we are associated to/creating.
598 * @ssid: used (together with @ssid_len) by drivers for hardware that
599 * generate beacons independently. The pointer is valid only during the
600 * config_interface() call, so copy the value somewhere if you need
602 * @ssid_len: length of the @ssid field.
604 * This structure is passed to the config_interface() callback of
605 * &struct ieee80211_hw.
607 struct ieee80211_if_conf
{
615 * enum ieee80211_key_alg - key algorithm
616 * @ALG_WEP: WEP40 or WEP104
618 * @ALG_CCMP: CCMP (AES)
620 enum ieee80211_key_alg
{
627 * enum ieee80211_key_len - key length
628 * @LEN_WEP40: WEP 5-byte long key
629 * @LEN_WEP104: WEP 13-byte long key
631 enum ieee80211_key_len
{
637 * enum ieee80211_key_flags - key flags
639 * These flags are used for communication about keys between the driver
640 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
642 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
643 * that the STA this key will be used with could be using QoS.
644 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
645 * driver to indicate that it requires IV generation for this
647 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
648 * the driver for a TKIP key if it requires Michael MIC
649 * generation in software.
650 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
651 * that the key is pairwise rather then a shared key.
653 enum ieee80211_key_flags
{
654 IEEE80211_KEY_FLAG_WMM_STA
= 1<<0,
655 IEEE80211_KEY_FLAG_GENERATE_IV
= 1<<1,
656 IEEE80211_KEY_FLAG_GENERATE_MMIC
= 1<<2,
657 IEEE80211_KEY_FLAG_PAIRWISE
= 1<<3,
661 * struct ieee80211_key_conf - key information
663 * This key information is given by mac80211 to the driver by
664 * the set_key() callback in &struct ieee80211_ops.
666 * @hw_key_idx: To be set by the driver, this is the key index the driver
667 * wants to be given when a frame is transmitted and needs to be
668 * encrypted in hardware.
669 * @alg: The key algorithm.
670 * @flags: key flags, see &enum ieee80211_key_flags.
671 * @keyidx: the key index (0-3)
672 * @keylen: key material length
673 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte)
675 * - Temporal Encryption Key (128 bits)
676 * - Temporal Authenticator Tx MIC Key (64 bits)
677 * - Temporal Authenticator Rx MIC Key (64 bits)
681 struct ieee80211_key_conf
{
682 enum ieee80211_key_alg alg
;
693 * enum set_key_cmd - key command
695 * Used with the set_key() callback in &struct ieee80211_ops, this
696 * indicates whether a key is being removed or added.
698 * @SET_KEY: a key is set
699 * @DISABLE_KEY: a key must be disabled
702 SET_KEY
, DISABLE_KEY
,
706 * struct ieee80211_sta - station table entry
708 * A station table entry represents a station we are possibly
709 * communicating with. Since stations are RCU-managed in
710 * mac80211, any ieee80211_sta pointer you get access to must
711 * either be protected by rcu_read_lock() explicitly or implicitly,
712 * or you must take good care to not use such a pointer after a
713 * call to your sta_notify callback that removed it.
716 * @aid: AID we assigned to the station if we're an AP
717 * @supp_rates: Bitmap of supported rates (per band)
718 * @ht_cap: HT capabilities of this STA
719 * @drv_priv: data area for driver use, will always be aligned to
720 * sizeof(void *), size is determined in hw information.
722 struct ieee80211_sta
{
723 u64 supp_rates
[IEEE80211_NUM_BANDS
];
726 struct ieee80211_sta_ht_cap ht_cap
;
729 u8 drv_priv
[0] __attribute__((__aligned__(sizeof(void *))));
733 * enum sta_notify_cmd - sta notify command
735 * Used with the sta_notify() callback in &struct ieee80211_ops, this
736 * indicates addition and removal of a station to station table.
738 * @STA_NOTIFY_ADD: a station was added to the station table
739 * @STA_NOTIFY_REMOVE: a station being removed from the station table
741 enum sta_notify_cmd
{
742 STA_NOTIFY_ADD
, STA_NOTIFY_REMOVE
746 * enum ieee80211_tkip_key_type - get tkip key
748 * Used by drivers which need to get a tkip key for skb. Some drivers need a
749 * phase 1 key, others need a phase 2 key. A single function allows the driver
750 * to get the key, this enum indicates what type of key is required.
752 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key
753 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key
755 enum ieee80211_tkip_key_type
{
756 IEEE80211_TKIP_P1_KEY
,
757 IEEE80211_TKIP_P2_KEY
,
761 * enum ieee80211_hw_flags - hardware flags
763 * These flags are used to indicate hardware capabilities to
764 * the stack. Generally, flags here should have their meaning
765 * done in a way that the simplest hardware doesn't need setting
766 * any particular flags. There are some exceptions to this rule,
767 * however, so you are advised to review these flags carefully.
769 * @IEEE80211_HW_RX_INCLUDES_FCS:
770 * Indicates that received frames passed to the stack include
771 * the FCS at the end.
773 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
774 * Some wireless LAN chipsets buffer broadcast/multicast frames
775 * for power saving stations in the hardware/firmware and others
776 * rely on the host system for such buffering. This option is used
777 * to configure the IEEE 802.11 upper layer to buffer broadcast and
778 * multicast frames when there are power saving stations so that
779 * the driver can fetch them with ieee80211_get_buffered_bc().
781 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE:
782 * Hardware is not capable of short slot operation on the 2.4 GHz band.
784 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE:
785 * Hardware is not capable of receiving frames with short preamble on
788 * @IEEE80211_HW_SIGNAL_UNSPEC:
789 * Hardware can provide signal values but we don't know its units. We
790 * expect values between 0 and @max_signal.
791 * If possible please provide dB or dBm instead.
793 * @IEEE80211_HW_SIGNAL_DB:
794 * Hardware gives signal values in dB, decibel difference from an
795 * arbitrary, fixed reference. We expect values between 0 and @max_signal.
796 * If possible please provide dBm instead.
798 * @IEEE80211_HW_SIGNAL_DBM:
799 * Hardware gives signal values in dBm, decibel difference from
800 * one milliwatt. This is the preferred method since it is standardized
801 * between different devices. @max_signal does not need to be set.
803 * @IEEE80211_HW_NOISE_DBM:
804 * Hardware can provide noise (radio interference) values in units dBm,
805 * decibel difference from one milliwatt.
807 * @IEEE80211_HW_SPECTRUM_MGMT:
808 * Hardware supports spectrum management defined in 802.11h
809 * Measurement, Channel Switch, Quieting, TPC
811 enum ieee80211_hw_flags
{
812 IEEE80211_HW_RX_INCLUDES_FCS
= 1<<1,
813 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
= 1<<2,
814 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
= 1<<3,
815 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
= 1<<4,
816 IEEE80211_HW_SIGNAL_UNSPEC
= 1<<5,
817 IEEE80211_HW_SIGNAL_DB
= 1<<6,
818 IEEE80211_HW_SIGNAL_DBM
= 1<<7,
819 IEEE80211_HW_NOISE_DBM
= 1<<8,
820 IEEE80211_HW_SPECTRUM_MGMT
= 1<<9,
824 * struct ieee80211_hw - hardware information and state
826 * This structure contains the configuration and hardware
827 * information for an 802.11 PHY.
829 * @wiphy: This points to the &struct wiphy allocated for this
830 * 802.11 PHY. You must fill in the @perm_addr and @dev
831 * members of this structure using SET_IEEE80211_DEV()
832 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported
833 * bands (with channels, bitrates) are registered here.
835 * @conf: &struct ieee80211_conf, device configuration, don't use.
837 * @workqueue: single threaded workqueue available for driver use,
838 * allocated by mac80211 on registration and flushed when an
839 * interface is removed.
840 * NOTICE: All work performed on this workqueue should NEVER
841 * acquire the RTNL lock (i.e. Don't use the function
842 * ieee80211_iterate_active_interfaces())
844 * @priv: pointer to private area that was allocated for driver use
845 * along with this structure.
847 * @flags: hardware flags, see &enum ieee80211_hw_flags.
849 * @extra_tx_headroom: headroom to reserve in each transmit skb
850 * for use by the driver (e.g. for transmit headers.)
852 * @channel_change_time: time (in microseconds) it takes to change channels.
854 * @max_signal: Maximum value for signal (rssi) in RX information, used
855 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB
857 * @max_listen_interval: max listen interval in units of beacon interval
860 * @queues: number of available hardware transmit queues for
861 * data packets. WMM/QoS requires at least four, these
862 * queues need to have configurable access parameters.
864 * @ampdu_queues: number of available hardware transmit queues
865 * for A-MPDU packets, these have no access parameters
866 * because they're used only for A-MPDU frames. Note that
867 * mac80211 will not currently use any of the regular queues
870 * @rate_control_algorithm: rate control algorithm for this hardware.
871 * If unset (NULL), the default algorithm will be used. Must be
872 * set before calling ieee80211_register_hw().
874 * @vif_data_size: size (in bytes) of the drv_priv data area
875 * within &struct ieee80211_vif.
876 * @sta_data_size: size (in bytes) of the drv_priv data area
877 * within &struct ieee80211_sta.
879 * @max_altrates: maximum number of alternate rate retry stages
880 * @max_altrate_tries: maximum number of tries for each stage
882 struct ieee80211_hw
{
883 struct ieee80211_conf conf
;
885 struct workqueue_struct
*workqueue
;
886 const char *rate_control_algorithm
;
889 unsigned int extra_tx_headroom
;
890 int channel_change_time
;
895 u16 max_listen_interval
;
898 u8 max_altrate_tries
;
902 * SET_IEEE80211_DEV - set device for 802.11 hardware
904 * @hw: the &struct ieee80211_hw to set the device for
905 * @dev: the &struct device of this 802.11 device
907 static inline void SET_IEEE80211_DEV(struct ieee80211_hw
*hw
, struct device
*dev
)
909 set_wiphy_dev(hw
->wiphy
, dev
);
913 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware
915 * @hw: the &struct ieee80211_hw to set the MAC address for
916 * @addr: the address to set
918 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw
*hw
, u8
*addr
)
920 memcpy(hw
->wiphy
->perm_addr
, addr
, ETH_ALEN
);
923 static inline int ieee80211_num_regular_queues(struct ieee80211_hw
*hw
)
928 static inline int ieee80211_num_queues(struct ieee80211_hw
*hw
)
930 return hw
->queues
+ hw
->ampdu_queues
;
933 static inline struct ieee80211_rate
*
934 ieee80211_get_tx_rate(const struct ieee80211_hw
*hw
,
935 const struct ieee80211_tx_info
*c
)
937 if (WARN_ON(c
->tx_rate_idx
< 0))
939 return &hw
->wiphy
->bands
[c
->band
]->bitrates
[c
->tx_rate_idx
];
942 static inline struct ieee80211_rate
*
943 ieee80211_get_rts_cts_rate(const struct ieee80211_hw
*hw
,
944 const struct ieee80211_tx_info
*c
)
946 if (c
->control
.rts_cts_rate_idx
< 0)
948 return &hw
->wiphy
->bands
[c
->band
]->bitrates
[c
->control
.rts_cts_rate_idx
];
951 static inline struct ieee80211_rate
*
952 ieee80211_get_alt_retry_rate(const struct ieee80211_hw
*hw
,
953 const struct ieee80211_tx_info
*c
, int idx
)
955 if (c
->control
.retries
[idx
].rate_idx
< 0)
957 return &hw
->wiphy
->bands
[c
->band
]->bitrates
[c
->control
.retries
[idx
].rate_idx
];
961 * DOC: Hardware crypto acceleration
963 * mac80211 is capable of taking advantage of many hardware
964 * acceleration designs for encryption and decryption operations.
966 * The set_key() callback in the &struct ieee80211_ops for a given
967 * device is called to enable hardware acceleration of encryption and
968 * decryption. The callback takes an @address parameter that will be
969 * the broadcast address for default keys, the other station's hardware
970 * address for individual keys or the zero address for keys that will
971 * be used only for transmission.
972 * Multiple transmission keys with the same key index may be used when
973 * VLANs are configured for an access point.
975 * The @local_address parameter will always be set to our own address,
976 * this is only relevant if you support multiple local addresses.
978 * When transmitting, the TX control data will use the @hw_key_idx
979 * selected by the driver by modifying the &struct ieee80211_key_conf
980 * pointed to by the @key parameter to the set_key() function.
982 * The set_key() call for the %SET_KEY command should return 0 if
983 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
984 * added; if you return 0 then hw_key_idx must be assigned to the
985 * hardware key index, you are free to use the full u8 range.
987 * When the cmd is %DISABLE_KEY then it must succeed.
989 * Note that it is permissible to not decrypt a frame even if a key
990 * for it has been uploaded to hardware, the stack will not make any
991 * decision based on whether a key has been uploaded or not but rather
992 * based on the receive flags.
994 * The &struct ieee80211_key_conf structure pointed to by the @key
995 * parameter is guaranteed to be valid until another call to set_key()
996 * removes it, but it can only be used as a cookie to differentiate
999 * In TKIP some HW need to be provided a phase 1 key, for RX decryption
1000 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key
1002 * The update_tkip_key() call updates the driver with the new phase 1 key.
1003 * This happens everytime the iv16 wraps around (every 65536 packets). The
1004 * set_key() call will happen only once for each key (unless the AP did
1005 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is
1006 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this
1007 * handler is software decryption with wrap around of iv16.
1011 * DOC: Frame filtering
1013 * mac80211 requires to see many management frames for proper
1014 * operation, and users may want to see many more frames when
1015 * in monitor mode. However, for best CPU usage and power consumption,
1016 * having as few frames as possible percolate through the stack is
1017 * desirable. Hence, the hardware should filter as much as possible.
1019 * To achieve this, mac80211 uses filter flags (see below) to tell
1020 * the driver's configure_filter() function which frames should be
1021 * passed to mac80211 and which should be filtered out.
1023 * The configure_filter() callback is invoked with the parameters
1024 * @mc_count and @mc_list for the combined multicast address list
1025 * of all virtual interfaces, @changed_flags telling which flags
1026 * were changed and @total_flags with the new flag states.
1028 * If your device has no multicast address filters your driver will
1029 * need to check both the %FIF_ALLMULTI flag and the @mc_count
1030 * parameter to see whether multicast frames should be accepted
1033 * All unsupported flags in @total_flags must be cleared.
1034 * Hardware does not support a flag if it is incapable of _passing_
1035 * the frame to the stack. Otherwise the driver must ignore
1036 * the flag, but not clear it.
1037 * You must _only_ clear the flag (announce no support for the
1038 * flag to mac80211) if you are not able to pass the packet type
1039 * to the stack (so the hardware always filters it).
1040 * So for example, you should clear @FIF_CONTROL, if your hardware
1041 * always filters control frames. If your hardware always passes
1042 * control frames to the kernel and is incapable of filtering them,
1043 * you do _not_ clear the @FIF_CONTROL flag.
1044 * This rule applies to all other FIF flags as well.
1048 * enum ieee80211_filter_flags - hardware filter flags
1050 * These flags determine what the filter in hardware should be
1051 * programmed to let through and what should not be passed to the
1052 * stack. It is always safe to pass more frames than requested,
1053 * but this has negative impact on power consumption.
1055 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
1056 * think of the BSS as your network segment and then this corresponds
1057 * to the regular ethernet device promiscuous mode.
1059 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested
1060 * by the user or if the hardware is not capable of filtering by
1061 * multicast address.
1063 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
1064 * %RX_FLAG_FAILED_FCS_CRC for them)
1066 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
1067 * the %RX_FLAG_FAILED_PLCP_CRC for them
1069 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
1070 * to the hardware that it should not filter beacons or probe responses
1071 * by BSSID. Filtering them can greatly reduce the amount of processing
1072 * mac80211 needs to do and the amount of CPU wakeups, so you should
1073 * honour this flag if possible.
1075 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then
1076 * only those addressed to this station
1078 * @FIF_OTHER_BSS: pass frames destined to other BSSes
1080 enum ieee80211_filter_flags
{
1081 FIF_PROMISC_IN_BSS
= 1<<0,
1082 FIF_ALLMULTI
= 1<<1,
1084 FIF_PLCPFAIL
= 1<<3,
1085 FIF_BCN_PRBRESP_PROMISC
= 1<<4,
1087 FIF_OTHER_BSS
= 1<<6,
1091 * enum ieee80211_ampdu_mlme_action - A-MPDU actions
1093 * These flags are used with the ampdu_action() callback in
1094 * &struct ieee80211_ops to indicate which action is needed.
1095 * @IEEE80211_AMPDU_RX_START: start Rx aggregation
1096 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
1097 * @IEEE80211_AMPDU_TX_START: start Tx aggregation
1098 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation
1100 enum ieee80211_ampdu_mlme_action
{
1101 IEEE80211_AMPDU_RX_START
,
1102 IEEE80211_AMPDU_RX_STOP
,
1103 IEEE80211_AMPDU_TX_START
,
1104 IEEE80211_AMPDU_TX_STOP
,
1108 * struct ieee80211_ops - callbacks from mac80211 to the driver
1110 * This structure contains various callbacks that the driver may
1111 * handle or, in some cases, must handle, for example to configure
1112 * the hardware to a new channel or to transmit a frame.
1114 * @tx: Handler that 802.11 module calls for each transmitted frame.
1115 * skb contains the buffer starting from the IEEE 802.11 header.
1116 * The low-level driver should send the frame out based on
1117 * configuration in the TX control data. This handler should,
1118 * preferably, never fail and stop queues appropriately, more
1119 * importantly, however, it must never fail for A-MPDU-queues.
1120 * Must be implemented and atomic.
1122 * @start: Called before the first netdevice attached to the hardware
1123 * is enabled. This should turn on the hardware and must turn on
1124 * frame reception (for possibly enabled monitor interfaces.)
1125 * Returns negative error codes, these may be seen in userspace,
1127 * When the device is started it should not have a MAC address
1128 * to avoid acknowledging frames before a non-monitor device
1130 * Must be implemented.
1132 * @stop: Called after last netdevice attached to the hardware
1133 * is disabled. This should turn off the hardware (at least
1134 * it must turn off frame reception.)
1135 * May be called right after add_interface if that rejects
1137 * Must be implemented.
1139 * @add_interface: Called when a netdevice attached to the hardware is
1140 * enabled. Because it is not called for monitor mode devices, @open
1141 * and @stop must be implemented.
1142 * The driver should perform any initialization it needs before
1143 * the device can be enabled. The initial configuration for the
1144 * interface is given in the conf parameter.
1145 * The callback may refuse to add an interface by returning a
1146 * negative error code (which will be seen in userspace.)
1147 * Must be implemented.
1149 * @remove_interface: Notifies a driver that an interface is going down.
1150 * The @stop callback is called after this if it is the last interface
1151 * and no monitor interfaces are present.
1152 * When all interfaces are removed, the MAC address in the hardware
1153 * must be cleared so the device no longer acknowledges packets,
1154 * the mac_addr member of the conf structure is, however, set to the
1155 * MAC address of the device going away.
1156 * Hence, this callback must be implemented.
1158 * @config: Handler for configuration requests. IEEE 802.11 code calls this
1159 * function to change hardware configuration, e.g., channel.
1161 * @config_interface: Handler for configuration requests related to interfaces
1162 * (e.g. BSSID changes.)
1164 * @bss_info_changed: Handler for configuration requests related to BSS
1165 * parameters that may vary during BSS's lifespan, and may affect low
1166 * level driver (e.g. assoc/disassoc status, erp parameters).
1167 * This function should not be used if no BSS has been set, unless
1168 * for association indication. The @changed parameter indicates which
1169 * of the bss parameters has changed when a call is made.
1171 * @configure_filter: Configure the device's RX filter.
1172 * See the section "Frame filtering" for more information.
1173 * This callback must be implemented and atomic.
1175 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
1176 * must be set or cleared for a given STA. Must be atomic.
1178 * @set_key: See the section "Hardware crypto acceleration"
1179 * This callback can sleep, and is only called between add_interface
1180 * and remove_interface calls, i.e. while the interface with the
1181 * given local_address is enabled.
1183 * @update_tkip_key: See the section "Hardware crypto acceleration"
1184 * This callback will be called in the context of Rx. Called for drivers
1185 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
1187 * @hw_scan: Ask the hardware to service the scan request, no need to start
1188 * the scan state machine in stack. The scan must honour the channel
1189 * configuration done by the regulatory agent in the wiphy's registered
1190 * bands. When the scan finishes, ieee80211_scan_completed() must be
1191 * called; note that it also must be called when the scan cannot finish
1192 * because the hardware is turned off! Anything else is a bug!
1194 * @get_stats: return low-level statistics
1196 * @get_tkip_seq: If your device implements TKIP encryption in hardware this
1197 * callback should be provided to read the TKIP transmit IVs (both IV32
1198 * and IV16) for the given key from hardware.
1200 * @set_rts_threshold: Configuration of RTS threshold (if device needs it)
1202 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if
1203 * the device does fragmentation by itself; if this method is assigned then
1204 * the stack will not do fragmentation.
1206 * @sta_notify: Notifies low level driver about addition or removal
1207 * of assocaited station or AP.
1209 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
1210 * bursting) for a hardware TX queue.
1212 * @get_tx_stats: Get statistics of the current TX queue status. This is used
1213 * to get number of currently queued packets (queue length), maximum queue
1214 * size (limit), and total number of packets sent using each TX queue
1215 * (count). The 'stats' pointer points to an array that has hw->queues +
1216 * hw->ampdu_queues items.
1218 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
1219 * this is only used for IBSS mode debugging and, as such, is not a
1220 * required function. Must be atomic.
1222 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
1223 * with other STAs in the IBSS. This is only used in IBSS mode. This
1224 * function is optional if the firmware/hardware takes full care of
1225 * TSF synchronization.
1227 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
1228 * This is needed only for IBSS mode and the result of this function is
1229 * used to determine whether to reply to Probe Requests.
1231 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic.
1233 * @ampdu_action: Perform a certain A-MPDU action
1234 * The RA/TID combination determines the destination and TID we want
1235 * the ampdu action to be performed for. The action is defined through
1236 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn)
1237 * is the first frame we expect to perform the action on. notice
1238 * that TX/RX_STOP can pass NULL for this parameter.
1240 struct ieee80211_ops
{
1241 int (*tx
)(struct ieee80211_hw
*hw
, struct sk_buff
*skb
);
1242 int (*start
)(struct ieee80211_hw
*hw
);
1243 void (*stop
)(struct ieee80211_hw
*hw
);
1244 int (*add_interface
)(struct ieee80211_hw
*hw
,
1245 struct ieee80211_if_init_conf
*conf
);
1246 void (*remove_interface
)(struct ieee80211_hw
*hw
,
1247 struct ieee80211_if_init_conf
*conf
);
1248 int (*config
)(struct ieee80211_hw
*hw
, u32 changed
);
1249 int (*config_interface
)(struct ieee80211_hw
*hw
,
1250 struct ieee80211_vif
*vif
,
1251 struct ieee80211_if_conf
*conf
);
1252 void (*bss_info_changed
)(struct ieee80211_hw
*hw
,
1253 struct ieee80211_vif
*vif
,
1254 struct ieee80211_bss_conf
*info
,
1256 void (*configure_filter
)(struct ieee80211_hw
*hw
,
1257 unsigned int changed_flags
,
1258 unsigned int *total_flags
,
1259 int mc_count
, struct dev_addr_list
*mc_list
);
1260 int (*set_tim
)(struct ieee80211_hw
*hw
, struct ieee80211_sta
*sta
,
1262 int (*set_key
)(struct ieee80211_hw
*hw
, enum set_key_cmd cmd
,
1263 const u8
*local_address
, const u8
*address
,
1264 struct ieee80211_key_conf
*key
);
1265 void (*update_tkip_key
)(struct ieee80211_hw
*hw
,
1266 struct ieee80211_key_conf
*conf
, const u8
*address
,
1267 u32 iv32
, u16
*phase1key
);
1268 int (*hw_scan
)(struct ieee80211_hw
*hw
, u8
*ssid
, size_t len
);
1269 int (*get_stats
)(struct ieee80211_hw
*hw
,
1270 struct ieee80211_low_level_stats
*stats
);
1271 void (*get_tkip_seq
)(struct ieee80211_hw
*hw
, u8 hw_key_idx
,
1272 u32
*iv32
, u16
*iv16
);
1273 int (*set_rts_threshold
)(struct ieee80211_hw
*hw
, u32 value
);
1274 int (*set_frag_threshold
)(struct ieee80211_hw
*hw
, u32 value
);
1275 void (*sta_notify
)(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
1276 enum sta_notify_cmd
, struct ieee80211_sta
*sta
);
1277 int (*conf_tx
)(struct ieee80211_hw
*hw
, u16 queue
,
1278 const struct ieee80211_tx_queue_params
*params
);
1279 int (*get_tx_stats
)(struct ieee80211_hw
*hw
,
1280 struct ieee80211_tx_queue_stats
*stats
);
1281 u64 (*get_tsf
)(struct ieee80211_hw
*hw
);
1282 void (*reset_tsf
)(struct ieee80211_hw
*hw
);
1283 int (*tx_last_beacon
)(struct ieee80211_hw
*hw
);
1284 int (*ampdu_action
)(struct ieee80211_hw
*hw
,
1285 enum ieee80211_ampdu_mlme_action action
,
1286 struct ieee80211_sta
*sta
, u16 tid
, u16
*ssn
);
1290 * ieee80211_alloc_hw - Allocate a new hardware device
1292 * This must be called once for each hardware device. The returned pointer
1293 * must be used to refer to this device when calling other functions.
1294 * mac80211 allocates a private data area for the driver pointed to by
1295 * @priv in &struct ieee80211_hw, the size of this area is given as
1298 * @priv_data_len: length of private data
1299 * @ops: callbacks for this device
1301 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
1302 const struct ieee80211_ops
*ops
);
1305 * ieee80211_register_hw - Register hardware device
1307 * You must call this function before any other functions in
1308 * mac80211. Note that before a hardware can be registered, you
1309 * need to fill the contained wiphy's information.
1311 * @hw: the device to register as returned by ieee80211_alloc_hw()
1313 int ieee80211_register_hw(struct ieee80211_hw
*hw
);
1315 #ifdef CONFIG_MAC80211_LEDS
1316 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw
*hw
);
1317 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw
*hw
);
1318 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw
*hw
);
1319 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw
*hw
);
1322 * ieee80211_get_tx_led_name - get name of TX LED
1324 * mac80211 creates a transmit LED trigger for each wireless hardware
1325 * that can be used to drive LEDs if your driver registers a LED device.
1326 * This function returns the name (or %NULL if not configured for LEDs)
1327 * of the trigger so you can automatically link the LED device.
1329 * @hw: the hardware to get the LED trigger name for
1331 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw
*hw
)
1333 #ifdef CONFIG_MAC80211_LEDS
1334 return __ieee80211_get_tx_led_name(hw
);
1341 * ieee80211_get_rx_led_name - get name of RX LED
1343 * mac80211 creates a receive LED trigger for each wireless hardware
1344 * that can be used to drive LEDs if your driver registers a LED device.
1345 * This function returns the name (or %NULL if not configured for LEDs)
1346 * of the trigger so you can automatically link the LED device.
1348 * @hw: the hardware to get the LED trigger name for
1350 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw
*hw
)
1352 #ifdef CONFIG_MAC80211_LEDS
1353 return __ieee80211_get_rx_led_name(hw
);
1360 * ieee80211_get_assoc_led_name - get name of association LED
1362 * mac80211 creates a association LED trigger for each wireless hardware
1363 * that can be used to drive LEDs if your driver registers a LED device.
1364 * This function returns the name (or %NULL if not configured for LEDs)
1365 * of the trigger so you can automatically link the LED device.
1367 * @hw: the hardware to get the LED trigger name for
1369 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw
*hw
)
1371 #ifdef CONFIG_MAC80211_LEDS
1372 return __ieee80211_get_assoc_led_name(hw
);
1379 * ieee80211_get_radio_led_name - get name of radio LED
1381 * mac80211 creates a radio change LED trigger for each wireless hardware
1382 * that can be used to drive LEDs if your driver registers a LED device.
1383 * This function returns the name (or %NULL if not configured for LEDs)
1384 * of the trigger so you can automatically link the LED device.
1386 * @hw: the hardware to get the LED trigger name for
1388 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw
*hw
)
1390 #ifdef CONFIG_MAC80211_LEDS
1391 return __ieee80211_get_radio_led_name(hw
);
1398 * ieee80211_unregister_hw - Unregister a hardware device
1400 * This function instructs mac80211 to free allocated resources
1401 * and unregister netdevices from the networking subsystem.
1403 * @hw: the hardware to unregister
1405 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
);
1408 * ieee80211_free_hw - free hardware descriptor
1410 * This function frees everything that was allocated, including the
1411 * private data for the driver. You must call ieee80211_unregister_hw()
1412 * before calling this function.
1414 * @hw: the hardware to free
1416 void ieee80211_free_hw(struct ieee80211_hw
*hw
);
1418 /* trick to avoid symbol clashes with the ieee80211 subsystem */
1419 void __ieee80211_rx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1420 struct ieee80211_rx_status
*status
);
1423 * ieee80211_rx - receive frame
1425 * Use this function to hand received frames to mac80211. The receive
1426 * buffer in @skb must start with an IEEE 802.11 header or a radiotap
1427 * header if %RX_FLAG_RADIOTAP is set in the @status flags.
1429 * This function may not be called in IRQ context. Calls to this function
1430 * for a single hardware must be synchronized against each other. Calls
1431 * to this function and ieee80211_rx_irqsafe() may not be mixed for a
1434 * @hw: the hardware this frame came in on
1435 * @skb: the buffer to receive, owned by mac80211 after this call
1436 * @status: status of this frame; the status pointer need not be valid
1437 * after this function returns
1439 static inline void ieee80211_rx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
1440 struct ieee80211_rx_status
*status
)
1442 __ieee80211_rx(hw
, skb
, status
);
1446 * ieee80211_rx_irqsafe - receive frame
1448 * Like ieee80211_rx() but can be called in IRQ context
1449 * (internally defers to a tasklet.)
1451 * Calls to this function and ieee80211_rx() may not be mixed for a
1454 * @hw: the hardware this frame came in on
1455 * @skb: the buffer to receive, owned by mac80211 after this call
1456 * @status: status of this frame; the status pointer need not be valid
1457 * after this function returns and is not freed by mac80211,
1458 * it is recommended that it points to a stack area
1460 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
,
1461 struct sk_buff
*skb
,
1462 struct ieee80211_rx_status
*status
);
1465 * ieee80211_tx_status - transmit status callback
1467 * Call this function for all transmitted frames after they have been
1468 * transmitted. It is permissible to not call this function for
1469 * multicast frames but this can affect statistics.
1471 * This function may not be called in IRQ context. Calls to this function
1472 * for a single hardware must be synchronized against each other. Calls
1473 * to this function and ieee80211_tx_status_irqsafe() may not be mixed
1474 * for a single hardware.
1476 * @hw: the hardware the frame was transmitted by
1477 * @skb: the frame that was transmitted, owned by mac80211 after this call
1479 void ieee80211_tx_status(struct ieee80211_hw
*hw
,
1480 struct sk_buff
*skb
);
1483 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback
1485 * Like ieee80211_tx_status() but can be called in IRQ context
1486 * (internally defers to a tasklet.)
1488 * Calls to this function and ieee80211_tx_status() may not be mixed for a
1491 * @hw: the hardware the frame was transmitted by
1492 * @skb: the frame that was transmitted, owned by mac80211 after this call
1494 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
1495 struct sk_buff
*skb
);
1498 * ieee80211_beacon_get - beacon generation function
1499 * @hw: pointer obtained from ieee80211_alloc_hw().
1500 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1502 * If the beacon frames are generated by the host system (i.e., not in
1503 * hardware/firmware), the low-level driver uses this function to receive
1504 * the next beacon frame from the 802.11 code. The low-level is responsible
1505 * for calling this function before beacon data is needed (e.g., based on
1506 * hardware interrupt). Returned skb is used only once and low-level driver
1507 * is responsible of freeing it.
1509 struct sk_buff
*ieee80211_beacon_get(struct ieee80211_hw
*hw
,
1510 struct ieee80211_vif
*vif
);
1513 * ieee80211_rts_get - RTS frame generation function
1514 * @hw: pointer obtained from ieee80211_alloc_hw().
1515 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1516 * @frame: pointer to the frame that is going to be protected by the RTS.
1517 * @frame_len: the frame length (in octets).
1518 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1519 * @rts: The buffer where to store the RTS frame.
1521 * If the RTS frames are generated by the host system (i.e., not in
1522 * hardware/firmware), the low-level driver uses this function to receive
1523 * the next RTS frame from the 802.11 code. The low-level is responsible
1524 * for calling this function before and RTS frame is needed.
1526 void ieee80211_rts_get(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
1527 const void *frame
, size_t frame_len
,
1528 const struct ieee80211_tx_info
*frame_txctl
,
1529 struct ieee80211_rts
*rts
);
1532 * ieee80211_rts_duration - Get the duration field for an RTS frame
1533 * @hw: pointer obtained from ieee80211_alloc_hw().
1534 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1535 * @frame_len: the length of the frame that is going to be protected by the RTS.
1536 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1538 * If the RTS is generated in firmware, but the host system must provide
1539 * the duration field, the low-level driver uses this function to receive
1540 * the duration field value in little-endian byteorder.
1542 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
1543 struct ieee80211_vif
*vif
, size_t frame_len
,
1544 const struct ieee80211_tx_info
*frame_txctl
);
1547 * ieee80211_ctstoself_get - CTS-to-self frame generation function
1548 * @hw: pointer obtained from ieee80211_alloc_hw().
1549 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1550 * @frame: pointer to the frame that is going to be protected by the CTS-to-self.
1551 * @frame_len: the frame length (in octets).
1552 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1553 * @cts: The buffer where to store the CTS-to-self frame.
1555 * If the CTS-to-self frames are generated by the host system (i.e., not in
1556 * hardware/firmware), the low-level driver uses this function to receive
1557 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible
1558 * for calling this function before and CTS-to-self frame is needed.
1560 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
,
1561 struct ieee80211_vif
*vif
,
1562 const void *frame
, size_t frame_len
,
1563 const struct ieee80211_tx_info
*frame_txctl
,
1564 struct ieee80211_cts
*cts
);
1567 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
1568 * @hw: pointer obtained from ieee80211_alloc_hw().
1569 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1570 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
1571 * @frame_txctl: &struct ieee80211_tx_info of the frame.
1573 * If the CTS-to-self is generated in firmware, but the host system must provide
1574 * the duration field, the low-level driver uses this function to receive
1575 * the duration field value in little-endian byteorder.
1577 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
1578 struct ieee80211_vif
*vif
,
1580 const struct ieee80211_tx_info
*frame_txctl
);
1583 * ieee80211_generic_frame_duration - Calculate the duration field for a frame
1584 * @hw: pointer obtained from ieee80211_alloc_hw().
1585 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1586 * @frame_len: the length of the frame.
1587 * @rate: the rate at which the frame is going to be transmitted.
1589 * Calculate the duration field of some generic frame, given its
1590 * length and transmission rate (in 100kbps).
1592 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
1593 struct ieee80211_vif
*vif
,
1595 struct ieee80211_rate
*rate
);
1598 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
1599 * @hw: pointer as obtained from ieee80211_alloc_hw().
1600 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
1602 * Function for accessing buffered broadcast and multicast frames. If
1603 * hardware/firmware does not implement buffering of broadcast/multicast
1604 * frames when power saving is used, 802.11 code buffers them in the host
1605 * memory. The low-level driver uses this function to fetch next buffered
1606 * frame. In most cases, this is used when generating beacon frame. This
1607 * function returns a pointer to the next buffered skb or NULL if no more
1608 * buffered frames are available.
1610 * Note: buffered frames are returned only after DTIM beacon frame was
1611 * generated with ieee80211_beacon_get() and the low-level driver must thus
1612 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
1613 * NULL if the previous generated beacon was not DTIM, so the low-level driver
1614 * does not need to check for DTIM beacons separately and should be able to
1615 * use common code for all beacons.
1618 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
);
1621 * ieee80211_get_hdrlen_from_skb - get header length from data
1623 * Given an skb with a raw 802.11 header at the data pointer this function
1624 * returns the 802.11 header length in bytes (not including encryption
1625 * headers). If the data in the sk_buff is too short to contain a valid 802.11
1626 * header the function returns 0.
1630 unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff
*skb
);
1633 * ieee80211_hdrlen - get header length in bytes from frame control
1634 * @fc: frame control field in little-endian format
1636 unsigned int ieee80211_hdrlen(__le16 fc
);
1639 * ieee80211_get_tkip_key - get a TKIP rc4 for skb
1641 * This function computes a TKIP rc4 key for an skb. It computes
1642 * a phase 1 key if needed (iv16 wraps around). This function is to
1643 * be used by drivers which can do HW encryption but need to compute
1644 * to phase 1/2 key in SW.
1646 * @keyconf: the parameter passed with the set key
1647 * @skb: the skb for which the key is needed
1649 * @key: a buffer to which the key will be written
1651 void ieee80211_get_tkip_key(struct ieee80211_key_conf
*keyconf
,
1652 struct sk_buff
*skb
,
1653 enum ieee80211_tkip_key_type type
, u8
*key
);
1655 * ieee80211_wake_queue - wake specific queue
1656 * @hw: pointer as obtained from ieee80211_alloc_hw().
1657 * @queue: queue number (counted from zero).
1659 * Drivers should use this function instead of netif_wake_queue.
1661 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
);
1664 * ieee80211_stop_queue - stop specific queue
1665 * @hw: pointer as obtained from ieee80211_alloc_hw().
1666 * @queue: queue number (counted from zero).
1668 * Drivers should use this function instead of netif_stop_queue.
1670 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
);
1673 * ieee80211_queue_stopped - test status of the queue
1674 * @hw: pointer as obtained from ieee80211_alloc_hw().
1675 * @queue: queue number (counted from zero).
1677 * Drivers should use this function instead of netif_stop_queue.
1680 int ieee80211_queue_stopped(struct ieee80211_hw
*hw
, int queue
);
1683 * ieee80211_stop_queues - stop all queues
1684 * @hw: pointer as obtained from ieee80211_alloc_hw().
1686 * Drivers should use this function instead of netif_stop_queue.
1688 void ieee80211_stop_queues(struct ieee80211_hw
*hw
);
1691 * ieee80211_wake_queues - wake all queues
1692 * @hw: pointer as obtained from ieee80211_alloc_hw().
1694 * Drivers should use this function instead of netif_wake_queue.
1696 void ieee80211_wake_queues(struct ieee80211_hw
*hw
);
1699 * ieee80211_scan_completed - completed hardware scan
1701 * When hardware scan offload is used (i.e. the hw_scan() callback is
1702 * assigned) this function needs to be called by the driver to notify
1703 * mac80211 that the scan finished.
1705 * @hw: the hardware that finished the scan
1707 void ieee80211_scan_completed(struct ieee80211_hw
*hw
);
1710 * ieee80211_iterate_active_interfaces - iterate active interfaces
1712 * This function iterates over the interfaces associated with a given
1713 * hardware that are currently active and calls the callback for them.
1714 * This function allows the iterator function to sleep, when the iterator
1715 * function is atomic @ieee80211_iterate_active_interfaces_atomic can
1718 * @hw: the hardware struct of which the interfaces should be iterated over
1719 * @iterator: the iterator function to call
1720 * @data: first argument of the iterator function
1722 void ieee80211_iterate_active_interfaces(struct ieee80211_hw
*hw
,
1723 void (*iterator
)(void *data
, u8
*mac
,
1724 struct ieee80211_vif
*vif
),
1728 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces
1730 * This function iterates over the interfaces associated with a given
1731 * hardware that are currently active and calls the callback for them.
1732 * This function requires the iterator callback function to be atomic,
1733 * if that is not desired, use @ieee80211_iterate_active_interfaces instead.
1735 * @hw: the hardware struct of which the interfaces should be iterated over
1736 * @iterator: the iterator function to call, cannot sleep
1737 * @data: first argument of the iterator function
1739 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw
*hw
,
1740 void (*iterator
)(void *data
,
1742 struct ieee80211_vif
*vif
),
1746 * ieee80211_start_tx_ba_session - Start a tx Block Ack session.
1747 * @hw: pointer as obtained from ieee80211_alloc_hw().
1748 * @ra: receiver address of the BA session recipient
1749 * @tid: the TID to BA on.
1751 * Return: success if addBA request was sent, failure otherwise
1753 * Although mac80211/low level driver/user space application can estimate
1754 * the need to start aggregation on a certain RA/TID, the session level
1755 * will be managed by the mac80211.
1757 int ieee80211_start_tx_ba_session(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
);
1760 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate.
1761 * @hw: pointer as obtained from ieee80211_alloc_hw().
1762 * @ra: receiver address of the BA session recipient.
1763 * @tid: the TID to BA on.
1765 * This function must be called by low level driver once it has
1766 * finished with preparations for the BA session.
1768 void ieee80211_start_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u16 tid
);
1771 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
1772 * @hw: pointer as obtained from ieee80211_alloc_hw().
1773 * @ra: receiver address of the BA session recipient.
1774 * @tid: the TID to BA on.
1776 * This function must be called by low level driver once it has
1777 * finished with preparations for the BA session.
1778 * This version of the function is IRQ-safe.
1780 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
, const u8
*ra
,
1784 * ieee80211_stop_tx_ba_session - Stop a Block Ack session.
1785 * @hw: pointer as obtained from ieee80211_alloc_hw().
1786 * @ra: receiver address of the BA session recipient
1787 * @tid: the TID to stop BA.
1788 * @initiator: if indicates initiator DELBA frame will be sent.
1790 * Return: error if no sta with matching da found, success otherwise
1792 * Although mac80211/low level driver/user space application can estimate
1793 * the need to stop aggregation on a certain RA/TID, the session level
1794 * will be managed by the mac80211.
1796 int ieee80211_stop_tx_ba_session(struct ieee80211_hw
*hw
,
1798 enum ieee80211_back_parties initiator
);
1801 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate.
1802 * @hw: pointer as obtained from ieee80211_alloc_hw().
1803 * @ra: receiver address of the BA session recipient.
1804 * @tid: the desired TID to BA on.
1806 * This function must be called by low level driver once it has
1807 * finished with preparations for the BA session tear down.
1809 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw
*hw
, u8
*ra
, u8 tid
);
1812 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
1813 * @hw: pointer as obtained from ieee80211_alloc_hw().
1814 * @ra: receiver address of the BA session recipient.
1815 * @tid: the desired TID to BA on.
1817 * This function must be called by low level driver once it has
1818 * finished with preparations for the BA session tear down.
1819 * This version of the function is IRQ-safe.
1821 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw
*hw
, const u8
*ra
,
1825 * ieee80211_notify_mac - low level driver notification
1826 * @hw: pointer as obtained from ieee80211_alloc_hw().
1827 * @notif_type: enum ieee80211_notification_types
1829 * This function must be called by low level driver to inform mac80211 of
1830 * low level driver status change or force mac80211 to re-assoc for low
1831 * level driver internal error that require re-assoc.
1833 void ieee80211_notify_mac(struct ieee80211_hw
*hw
,
1834 enum ieee80211_notification_types notif_type
);
1837 * ieee80211_find_sta - find a station
1839 * @hw: pointer as obtained from ieee80211_alloc_hw()
1840 * @addr: station's address
1842 * This function must be called under RCU lock and the
1843 * resulting pointer is only valid under RCU lock as well.
1845 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_hw
*hw
,
1849 /* Rate control API */
1851 * struct rate_selection - rate information for/from rate control algorithms
1853 * @rate_idx: selected transmission rate index
1854 * @nonerp_idx: Non-ERP rate to use instead if ERP cannot be used
1855 * @probe_idx: rate for probing (or -1)
1856 * @max_rate_idx: maximum rate index that can be used, this is
1857 * input to the algorithm and will be enforced
1859 struct rate_selection
{
1860 s8 rate_idx
, nonerp_idx
, probe_idx
, max_rate_idx
;
1863 struct rate_control_ops
{
1864 struct module
*module
;
1866 void *(*alloc
)(struct ieee80211_hw
*hw
, struct dentry
*debugfsdir
);
1867 void (*clear
)(void *priv
);
1868 void (*free
)(void *priv
);
1870 void *(*alloc_sta
)(void *priv
, struct ieee80211_sta
*sta
, gfp_t gfp
);
1871 void (*rate_init
)(void *priv
, struct ieee80211_supported_band
*sband
,
1872 struct ieee80211_sta
*sta
, void *priv_sta
);
1873 void (*free_sta
)(void *priv
, struct ieee80211_sta
*sta
,
1876 void (*tx_status
)(void *priv
, struct ieee80211_supported_band
*sband
,
1877 struct ieee80211_sta
*sta
, void *priv_sta
,
1878 struct sk_buff
*skb
);
1879 void (*get_rate
)(void *priv
, struct ieee80211_supported_band
*sband
,
1880 struct ieee80211_sta
*sta
, void *priv_sta
,
1881 struct sk_buff
*skb
,
1882 struct rate_selection
*sel
);
1884 void (*add_sta_debugfs
)(void *priv
, void *priv_sta
,
1885 struct dentry
*dir
);
1886 void (*remove_sta_debugfs
)(void *priv
, void *priv_sta
);
1889 static inline int rate_supported(struct ieee80211_sta
*sta
,
1890 enum ieee80211_band band
,
1893 return (sta
== NULL
|| sta
->supp_rates
[band
] & BIT(index
));
1897 rate_lowest_index(struct ieee80211_supported_band
*sband
,
1898 struct ieee80211_sta
*sta
)
1902 for (i
= 0; i
< sband
->n_bitrates
; i
++)
1903 if (rate_supported(sta
, sband
->band
, i
))
1906 /* warn when we cannot find a rate. */
1913 int ieee80211_rate_control_register(struct rate_control_ops
*ops
);
1914 void ieee80211_rate_control_unregister(struct rate_control_ops
*ops
);
1916 #endif /* MAC80211_H */