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 function.
47 * If you're reading this document and not the header file itself, it will
48 * be incomplete because not all documentation has been converted yet.
54 * As a general rule, when frames are passed between mac80211 and the driver,
55 * they start with the IEEE 802.11 header and include the same octets that are
56 * sent over the air except for the FCS which should be calculated by the
59 * There are, however, various exceptions to this rule for advanced features:
61 * The first exception is for hardware encryption and decryption offload
62 * where the IV/ICV may or may not be generated in hardware.
64 * Secondly, when the hardware handles fragmentation, the frame handed to
65 * the driver from mac80211 is the MSDU, not the MPDU.
67 * Finally, for received frames, the driver is able to indicate that it has
68 * filled a radiotap header and put that in front of the frame; if it does
69 * not do so then mac80211 may add this under certain circumstances.
72 #define IEEE80211_CHAN_W_SCAN 0x00000001
73 #define IEEE80211_CHAN_W_ACTIVE_SCAN 0x00000002
74 #define IEEE80211_CHAN_W_IBSS 0x00000004
76 /* Channel information structure. Low-level driver is expected to fill in chan,
77 * freq, and val fields. Other fields will be filled in by 80211.o based on
78 * hostapd information and low-level driver does not need to use them. The
79 * limits for each channel will be provided in 'struct ieee80211_conf' when
80 * configuring the low-level driver with hw->config callback. If a device has
81 * a default regulatory domain, IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED
82 * can be set to let the driver configure all fields */
83 struct ieee80211_channel {
84 short chan; /* channel number (IEEE 802.11) */
85 short freq; /* frequency in MHz */
86 int val; /* hw specific value for the channel */
87 int flag; /* flag for hostapd use (IEEE80211_CHAN_*) */
88 unsigned char power_level;
89 unsigned char antenna_max;
92 #define IEEE80211_RATE_ERP 0x00000001
93 #define IEEE80211_RATE_BASIC 0x00000002
94 #define IEEE80211_RATE_PREAMBLE2 0x00000004
95 #define IEEE80211_RATE_SUPPORTED 0x00000010
96 #define IEEE80211_RATE_OFDM 0x00000020
97 #define IEEE80211_RATE_CCK 0x00000040
98 #define IEEE80211_RATE_MANDATORY 0x00000100
100 #define IEEE80211_RATE_CCK_2 (IEEE80211_RATE_CCK | IEEE80211_RATE_PREAMBLE2)
101 #define IEEE80211_RATE_MODULATION(f) \
102 (f & (IEEE80211_RATE_CCK | IEEE80211_RATE_OFDM))
104 /* Low-level driver should set PREAMBLE2, OFDM and CCK flags.
105 * BASIC, SUPPORTED, ERP, and MANDATORY flags are set in 80211.o based on the
107 struct ieee80211_rate {
108 int rate; /* rate in 100 kbps */
109 int val; /* hw specific value for the rate */
110 int flags; /* IEEE80211_RATE_ flags */
111 int val2; /* hw specific value for the rate when using short preamble
112 * (only when IEEE80211_RATE_PREAMBLE2 flag is set, i.e., for
113 * 2, 5.5, and 11 Mbps) */
114 signed char min_rssi_ack;
115 unsigned char min_rssi_ack_delta;
117 /* following fields are set by 80211.o and need not be filled by the
118 * low-level driver */
119 int rate_inv; /* inverse of the rate (LCM(all rates) / rate) for
120 * optimizing channel utilization estimates */
124 * enum ieee80211_phymode - PHY modes
126 * @MODE_IEEE80211A: 5GHz as defined by 802.11a/802.11h
127 * @MODE_IEEE80211B: 2.4 GHz as defined by 802.11b
128 * @MODE_IEEE80211G: 2.4 GHz as defined by 802.11g (with OFDM),
129 * backwards compatible with 11b mode
130 * @NUM_IEEE80211_MODES: internal
132 enum ieee80211_phymode {
142 * struct ieee80211_hw_mode - PHY mode definition
144 * This structure describes the capabilities supported by the device
145 * in a single PHY mode.
147 * @mode: the PHY mode for this definition
148 * @num_channels: number of supported channels
149 * @channels: pointer to array of supported channels
150 * @num_rates: number of supported bitrates
151 * @rates: pointer to array of supported bitrates
154 struct ieee80211_hw_mode {
155 struct list_head list;
156 struct ieee80211_channel *channels;
157 struct ieee80211_rate *rates;
158 enum ieee80211_phymode mode;
164 * struct ieee80211_tx_queue_params - transmit queue configuration
166 * The information provided in this structure is required for QoS
167 * transmit queue configuration.
169 * @aifs: arbitration interface space [0..255, -1: use default]
170 * @cw_min: minimum contention window [will be a value of the form
171 * 2^n-1 in the range 1..1023; 0: use default]
172 * @cw_max: maximum contention window [like @cw_min]
173 * @burst_time: maximum burst time in units of 0.1ms, 0 meaning disabled
175 struct ieee80211_tx_queue_params {
183 * struct ieee80211_tx_queue_stats_data - transmit queue statistics
185 * @len: number of packets in queue
186 * @limit: queue length limit
187 * @count: number of frames sent
189 struct ieee80211_tx_queue_stats_data {
196 * enum ieee80211_tx_queue - transmit queue number
198 * These constants are used with some callbacks that take a
199 * queue number to set parameters for a queue.
201 * @IEEE80211_TX_QUEUE_DATA0: data queue 0
202 * @IEEE80211_TX_QUEUE_DATA1: data queue 1
203 * @IEEE80211_TX_QUEUE_DATA2: data queue 2
204 * @IEEE80211_TX_QUEUE_DATA3: data queue 3
205 * @IEEE80211_TX_QUEUE_DATA4: data queue 4
206 * @IEEE80211_TX_QUEUE_SVP: ??
207 * @NUM_TX_DATA_QUEUES: number of data queues
208 * @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be
209 * sent after a beacon
210 * @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames
212 enum ieee80211_tx_queue {
213 IEEE80211_TX_QUEUE_DATA0,
214 IEEE80211_TX_QUEUE_DATA1,
215 IEEE80211_TX_QUEUE_DATA2,
216 IEEE80211_TX_QUEUE_DATA3,
217 IEEE80211_TX_QUEUE_DATA4,
218 IEEE80211_TX_QUEUE_SVP,
222 /* due to stupidity in the sub-ioctl userspace interface, the items in
223 * this struct need to have fixed values. As soon as it is removed, we can
224 * fix these entries. */
225 IEEE80211_TX_QUEUE_AFTER_BEACON = 6,
226 IEEE80211_TX_QUEUE_BEACON = 7
229 struct ieee80211_tx_queue_stats {
230 struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES];
233 struct ieee80211_low_level_stats {
234 unsigned int dot11ACKFailureCount;
235 unsigned int dot11RTSFailureCount;
236 unsigned int dot11FCSErrorCount;
237 unsigned int dot11RTSSuccessCount;
240 /* Transmit control fields. This data structure is passed to low-level driver
241 * with each TX frame. The low-level driver is responsible for configuring
242 * the hardware to use given values (depending on what is supported). */
244 struct ieee80211_tx_control {
245 int tx_rate; /* Transmit rate, given as the hw specific value for the
246 * rate (from struct ieee80211_rate) */
247 int rts_cts_rate; /* Transmit rate for RTS/CTS frame, given as the hw
248 * specific value for the rate (from
249 * struct ieee80211_rate) */
251 #define IEEE80211_TXCTL_REQ_TX_STATUS (1<<0)/* request TX status callback for
253 #define IEEE80211_TXCTL_DO_NOT_ENCRYPT (1<<1) /* send this frame without
254 * encryption; e.g., for EAPOL
256 #define IEEE80211_TXCTL_USE_RTS_CTS (1<<2) /* use RTS-CTS before sending
258 #define IEEE80211_TXCTL_USE_CTS_PROTECT (1<<3) /* use CTS protection for the
259 * frame (e.g., for combined
260 * 802.11g / 802.11b networks) */
261 #define IEEE80211_TXCTL_NO_ACK (1<<4) /* tell the low level not to
263 #define IEEE80211_TXCTL_RATE_CTRL_PROBE (1<<5)
264 #define IEEE80211_TXCTL_CLEAR_DST_MASK (1<<6)
265 #define IEEE80211_TXCTL_REQUEUE (1<<7)
266 #define IEEE80211_TXCTL_FIRST_FRAGMENT (1<<8) /* this is a first fragment of
268 #define IEEE80211_TXCTL_LONG_RETRY_LIMIT (1<<10) /* this frame should be send
270 * set_retry_limit configured
271 * long retry value */
272 u32 flags; /* tx control flags defined
274 u8 key_idx; /* keyidx from hw->set_key(), undefined if
275 * IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */
276 u8 retry_limit; /* 1 = only first attempt, 2 = one retry, ..
277 * This could be used when set_retry_limit
278 * is not implemented by the driver */
279 u8 power_level; /* per-packet transmit power level, in dBm */
280 u8 antenna_sel_tx; /* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
281 u8 icv_len; /* length of the ICV/MIC field in octets */
282 u8 iv_len; /* length of the IV field in octets */
283 u8 queue; /* hardware queue to use for this frame;
284 * 0 = highest, hw->queues-1 = lowest */
285 struct ieee80211_rate *rate; /* internal 80211.o rate */
286 struct ieee80211_rate *rts_rate; /* internal 80211.o rate
288 int alt_retry_rate; /* retry rate for the last retries, given as the
289 * hw specific value for the rate (from
290 * struct ieee80211_rate). To be used to limit
291 * packet dropping when probing higher rates, if hw
292 * supports multiple retry rates. -1 = not used */
293 int type; /* internal */
294 int ifindex; /* internal */
299 * enum mac80211_rx_flags - receive flags
301 * These flags are used with the @flag member of &struct ieee80211_rx_status.
302 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
303 * Use together with %RX_FLAG_MMIC_STRIPPED.
304 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
305 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header.
306 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
307 * verification has been done by the hardware.
308 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
309 * If this flag is set, the stack cannot do any replay detection
310 * hence the driver or hardware will have to do that.
311 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
313 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
316 enum mac80211_rx_flags {
317 RX_FLAG_MMIC_ERROR = 1<<0,
318 RX_FLAG_DECRYPTED = 1<<1,
319 RX_FLAG_RADIOTAP = 1<<2,
320 RX_FLAG_MMIC_STRIPPED = 1<<3,
321 RX_FLAG_IV_STRIPPED = 1<<4,
322 RX_FLAG_FAILED_FCS_CRC = 1<<5,
323 RX_FLAG_FAILED_PLCP_CRC = 1<<6,
327 * struct ieee80211_rx_status - receive status
329 * The low-level driver should provide this information (the subset
330 * supported by hardware) to the 802.11 code with each received
332 * @mactime: MAC timestamp as defined by 802.11
333 * @freq: frequency the radio was tuned to when receiving this frame, in MHz
334 * @channel: channel the radio was tuned to
335 * @phymode: active PHY mode
336 * @ssi: signal strength when receiving this frame
337 * @signal: used as 'qual' in statistics reporting
338 * @noise: PHY noise when receiving this frame
339 * @antenna: antenna used
343 struct ieee80211_rx_status {
347 enum ieee80211_phymode phymode;
357 * enum ieee80211_tx_status_flags - transmit status flags
359 * Status flags to indicate various transmit conditions.
361 * @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted
362 * because the destination STA was in powersave mode.
364 * @IEEE80211_TX_STATUS_ACK: Frame was acknowledged
366 enum ieee80211_tx_status_flags {
367 IEEE80211_TX_STATUS_TX_FILTERED = 1<<0,
368 IEEE80211_TX_STATUS_ACK = 1<<1,
372 * struct ieee80211_tx_status - transmit status
374 * As much information as possible should be provided for each transmitted
375 * frame with ieee80211_tx_status().
377 * @control: a copy of the &struct ieee80211_tx_control passed to the driver
378 * in the tx() callback.
380 * @flags: transmit status flags, defined above
382 * @ack_signal: signal strength of the ACK frame
384 * @excessive_retries: set to 1 if the frame was retried many times
385 * but not acknowledged
387 * @retry_count: number of retries
389 * @queue_length: ?? REMOVE
390 * @queue_number: ?? REMOVE
392 struct ieee80211_tx_status {
393 struct ieee80211_tx_control control;
395 bool excessive_retries;
403 * enum ieee80211_conf_flags - configuration flags
405 * Flags to define PHY configuration options
407 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time
408 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
411 enum ieee80211_conf_flags {
412 IEEE80211_CONF_SHORT_SLOT_TIME = 1<<0,
413 IEEE80211_CONF_RADIOTAP = 1<<1,
417 * struct ieee80211_conf - configuration of the device
419 * This struct indicates how the driver shall configure the hardware.
421 * @radio_enabled: when zero, driver is required to switch off the radio.
423 * @channel: IEEE 802.11 channel number
424 * @freq: frequency in MHz
425 * @channel_val: hardware specific channel value for the channel
426 * @phymode: PHY mode to activate (REMOVE)
427 * @chan: channel to switch to, pointer to the channel information
428 * @mode: pointer to mode definition
429 * @regulatory_domain: ??
430 * @beacon_int: beacon interval (TODO make interface config)
431 * @flags: configuration flags defined above
432 * @power_level: transmit power limit for current regulatory domain in dBm
433 * @antenna_max: maximum antenna gain
434 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity,
436 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx
438 struct ieee80211_conf {
439 int channel; /* IEEE 802.11 channel number */
441 int channel_val; /* hw specific value for the channel */
443 enum ieee80211_phymode phymode;
444 struct ieee80211_channel *chan;
445 struct ieee80211_hw_mode *mode;
446 unsigned int regulatory_domain;
458 * enum ieee80211_if_types - types of 802.11 network interfaces
460 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used
462 * @IEEE80211_IF_TYPE_AP: interface in AP mode.
463 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap
464 * daemon. Drivers should never see this type.
465 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode.
466 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode.
467 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode.
468 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode.
469 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers
470 * will never see this type.
472 enum ieee80211_if_types {
473 IEEE80211_IF_TYPE_INVALID,
474 IEEE80211_IF_TYPE_AP,
475 IEEE80211_IF_TYPE_MGMT,
476 IEEE80211_IF_TYPE_STA,
477 IEEE80211_IF_TYPE_IBSS,
478 IEEE80211_IF_TYPE_MNTR,
479 IEEE80211_IF_TYPE_WDS,
480 IEEE80211_IF_TYPE_VLAN,
484 * struct ieee80211_if_init_conf - initial configuration of an interface
486 * @if_id: internal interface ID. This number has no particular meaning to
487 * drivers and the only allowed usage is to pass it to
488 * ieee80211_beacon_get() and ieee80211_get_buffered_bc() functions.
489 * This field is not valid for monitor interfaces
490 * (interfaces of %IEEE80211_IF_TYPE_MNTR type).
491 * @type: one of &enum ieee80211_if_types constants. Determines the type of
492 * added/removed interface.
493 * @mac_addr: pointer to MAC address of the interface. This pointer is valid
494 * until the interface is removed (i.e. it cannot be used after
495 * remove_interface() callback was called for this interface).
497 * This structure is used in add_interface() and remove_interface()
498 * callbacks of &struct ieee80211_hw.
500 * When you allow multiple interfaces to be added to your PHY, take care
501 * that the hardware can actually handle multiple MAC addresses. However,
502 * also take care that when there's no interface left with mac_addr != %NULL
503 * you remove the MAC address from the device to avoid acknowledging packets
504 * in pure monitor mode.
506 struct ieee80211_if_init_conf {
508 enum ieee80211_if_types type;
513 * struct ieee80211_if_conf - configuration of an interface
515 * @type: type of the interface. This is always the same as was specified in
516 * &struct ieee80211_if_init_conf. The type of an interface never changes
517 * during the life of the interface; this field is present only for
519 * @bssid: BSSID of the network we are associated to/creating.
520 * @ssid: used (together with @ssid_len) by drivers for hardware that
521 * generate beacons independently. The pointer is valid only during the
522 * config_interface() call, so copy the value somewhere if you need
524 * @ssid_len: length of the @ssid field.
525 * @beacon: beacon template. Valid only if @host_gen_beacon_template in
526 * &struct ieee80211_hw is set. The driver is responsible of freeing
528 * @beacon_control: tx_control for the beacon template, this field is only
529 * valid when the @beacon field was set.
531 * This structure is passed to the config_interface() callback of
532 * &struct ieee80211_hw.
534 struct ieee80211_if_conf {
539 struct sk_buff *beacon;
540 struct ieee80211_tx_control *beacon_control;
544 * enum ieee80211_key_alg - key algorithm
545 * @ALG_NONE: Unset key algorithm, will never be passed to the driver
546 * @ALG_WEP: WEP40 or WEP104
548 * @ALG_CCMP: CCMP (AES)
550 enum ieee80211_key_alg {
559 * enum ieee80211_key_flags - key flags
561 * These flags are used for communication about keys between the driver
562 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
564 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
565 * that the STA this key will be used with could be using QoS.
566 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
567 * driver to indicate that it requires IV generation for this
569 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
570 * the driver for a TKIP key if it requires Michael MIC
571 * generation in software.
573 enum ieee80211_key_flags {
574 IEEE80211_KEY_FLAG_WMM_STA = 1<<0,
575 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1,
576 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
580 * struct ieee80211_key_conf - key information
582 * This key information is given by mac80211 to the driver by
583 * the set_key() callback in &struct ieee80211_ops.
585 * @hw_key_idx: To be set by the driver, this is the key index the driver
586 * wants to be given when a frame is transmitted and needs to be
587 * encrypted in hardware.
588 * @alg: The key algorithm.
589 * @flags: key flags, see &enum ieee80211_key_flags.
590 * @keyidx: the key index (0-3)
591 * @keylen: key material length
594 struct ieee80211_key_conf {
595 enum ieee80211_key_alg alg;
603 #define IEEE80211_SEQ_COUNTER_RX 0
604 #define IEEE80211_SEQ_COUNTER_TX 1
607 * enum set_key_cmd - key command
609 * Used with the set_key() callback in &struct ieee80211_ops, this
610 * indicates whether a key is being removed or added.
612 * @SET_KEY: a key is set
613 * @DISABLE_KEY: a key must be disabled
616 SET_KEY, DISABLE_KEY,
621 * enum ieee80211_hw_flags - hardware flags
623 * These flags are used to indicate hardware capabilities to
624 * the stack. Generally, flags here should have their meaning
625 * done in a way that the simplest hardware doesn't need setting
626 * any particular flags. There are some exceptions to this rule,
627 * however, so you are advised to review these flags carefully.
629 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE:
630 * The device only needs to be supplied with a beacon template.
631 * If you need the host to generate each beacon then don't use
632 * this flag and call ieee80211_beacon_get() when you need the
633 * next beacon frame. Note that if you set this flag, you must
634 * implement the set_tim() callback for powersave mode to work
636 * This flag is only relevant for access-point mode.
638 * @IEEE80211_HW_RX_INCLUDES_FCS:
639 * Indicates that received frames passed to the stack include
640 * the FCS at the end.
642 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
643 * Some wireless LAN chipsets buffer broadcast/multicast frames
644 * for power saving stations in the hardware/firmware and others
645 * rely on the host system for such buffering. This option is used
646 * to configure the IEEE 802.11 upper layer to buffer broadcast and
647 * multicast frames when there are power saving stations so that
648 * the driver can fetch them with ieee80211_get_buffered_bc(). Note
649 * that not setting this flag works properly only when the
650 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because
651 * otherwise the stack will not know when the DTIM beacon was sent.
653 * @IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED:
654 * Channels are already configured to the default regulatory domain
655 * specified in the device's EEPROM
657 enum ieee80211_hw_flags {
658 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0,
659 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
660 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
661 IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED = 1<<3,
665 * struct ieee80211_hw - hardware information and state
667 * This structure contains the configuration and hardware
668 * information for an 802.11 PHY.
670 * @wiphy: This points to the &struct wiphy allocated for this
671 * 802.11 PHY. You must fill in the @perm_addr and @dev
672 * members of this structure using SET_IEEE80211_DEV()
673 * and SET_IEEE80211_PERM_ADDR().
675 * @conf: &struct ieee80211_conf, device configuration, don't use.
677 * @workqueue: single threaded workqueue available for driver use,
678 * allocated by mac80211 on registration and flushed on
681 * @priv: pointer to private area that was allocated for driver use
682 * along with this structure.
684 * @flags: hardware flags, see &enum ieee80211_hw_flags.
686 * @extra_tx_headroom: headroom to reserve in each transmit skb
687 * for use by the driver (e.g. for transmit headers.)
689 * @channel_change_time: time (in microseconds) it takes to change channels.
691 * @max_rssi: Maximum value for ssi in RX information, use
692 * negative numbers for dBm and 0 to indicate no support.
694 * @max_signal: like @max_rssi, but for the signal value.
696 * @max_noise: like @max_rssi, but for the noise value.
698 * @queues: number of available hardware transmit queues for
699 * data packets. WMM/QoS requires at least four.
701 struct ieee80211_hw {
702 struct ieee80211_conf conf;
704 struct workqueue_struct *workqueue;
707 unsigned int extra_tx_headroom;
708 int channel_change_time;
716 * SET_IEEE80211_DEV - set device for 802.11 hardware
718 * @hw: the &struct ieee80211_hw to set the device for
719 * @dev: the &struct device of this 802.11 device
721 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
723 set_wiphy_dev(hw->wiphy, dev);
727 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware
729 * @hw: the &struct ieee80211_hw to set the MAC address for
730 * @addr: the address to set
732 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
734 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
738 * DOC: Hardware crypto acceleration
740 * mac80211 is capable of taking advantage of many hardware
741 * acceleration designs for encryption and decryption operations.
743 * The set_key() callback in the &struct ieee80211_ops for a given
744 * device is called to enable hardware acceleration of encryption and
745 * decryption. The callback takes an @address parameter that will be
746 * the broadcast address for default keys, the other station's hardware
747 * address for individual keys or the zero address for keys that will
748 * be used only for transmission.
749 * Multiple transmission keys with the same key index may be used when
750 * VLANs are configured for an access point.
752 * The @local_address parameter will always be set to our own address,
753 * this is only relevant if you support multiple local addresses.
755 * When transmitting, the TX control data will use the @hw_key_idx
756 * selected by the driver by modifying the &struct ieee80211_key_conf
757 * pointed to by the @key parameter to the set_key() function.
759 * The set_key() call for the %SET_KEY command should return 0 if
760 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
761 * added; if you return 0 then hw_key_idx must be assigned to the
762 * hardware key index, you are free to use the full u8 range.
764 * When the cmd is %DISABLE_KEY then it must succeed.
766 * Note that it is permissible to not decrypt a frame even if a key
767 * for it has been uploaded to hardware, the stack will not make any
768 * decision based on whether a key has been uploaded or not but rather
769 * based on the receive flags.
771 * The &struct ieee80211_key_conf structure pointed to by the @key
772 * parameter is guaranteed to be valid until another call to set_key()
773 * removes it, but it can only be used as a cookie to differentiate
778 * DOC: Frame filtering
780 * mac80211 requires to see many management frames for proper
781 * operation, and users may want to see many more frames when
782 * in monitor mode. However, for best CPU usage and power consumption,
783 * having as few frames as possible percolate through the stack is
784 * desirable. Hence, the hardware should filter as much as possible.
786 * To achieve this, mac80211 uses filter flags (see below) to tell
787 * the driver's configure_filter() function which frames should be
788 * passed to mac80211 and which should be filtered out.
790 * The configure_filter() callback is invoked with the parameters
791 * @mc_count and @mc_list for the combined multicast address list
792 * of all virtual interfaces, @changed_flags telling which flags
793 * were changed and @total_flags with the new flag states.
795 * If your device has no multicast address filters your driver will
796 * need to check both the %FIF_ALLMULTI flag and the @mc_count
797 * parameter to see whether multicast frames should be accepted
800 * All unsupported flags in @total_flags must be cleared, i.e. you
801 * should clear all bits except those you honoured.
805 * enum ieee80211_filter_flags - hardware filter flags
807 * These flags determine what the filter in hardware should be
808 * programmed to let through and what should not be passed to the
809 * stack. It is always safe to pass more frames than requested,
810 * but this has negative impact on power consumption.
812 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
813 * think of the BSS as your network segment and then this corresponds
814 * to the regular ethernet device promiscuous mode.
816 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested
817 * by the user or if the hardware is not capable of filtering by
820 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
821 * %RX_FLAG_FAILED_FCS_CRC for them)
823 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
824 * the %RX_FLAG_FAILED_PLCP_CRC for them
826 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
827 * to the hardware that it should not filter beacons or probe responses
828 * by BSSID. Filtering them can greatly reduce the amount of processing
829 * mac80211 needs to do and the amount of CPU wakeups, so you should
830 * honour this flag if possible.
832 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then
833 * only those addressed to this station
835 * @FIF_OTHER_BSS: pass frames destined to other BSSes
837 enum ieee80211_filter_flags {
838 FIF_PROMISC_IN_BSS = 1<<0,
842 FIF_BCN_PRBRESP_PROMISC = 1<<4,
844 FIF_OTHER_BSS = 1<<6,
848 * enum ieee80211_erp_change_flags - erp change flags
850 * These flags are used with the erp_ie_changed() callback in
851 * &struct ieee80211_ops to indicate which parameter(s) changed.
852 * @IEEE80211_ERP_CHANGE_PROTECTION: protection changed
853 * @IEEE80211_ERP_CHANGE_PREAMBLE: barker preamble mode changed
855 enum ieee80211_erp_change_flags {
856 IEEE80211_ERP_CHANGE_PROTECTION = 1<<0,
857 IEEE80211_ERP_CHANGE_PREAMBLE = 1<<1,
862 * struct ieee80211_ops - callbacks from mac80211 to the driver
864 * This structure contains various callbacks that the driver may
865 * handle or, in some cases, must handle, for example to configure
866 * the hardware to a new channel or to transmit a frame.
868 * @tx: Handler that 802.11 module calls for each transmitted frame.
869 * skb contains the buffer starting from the IEEE 802.11 header.
870 * The low-level driver should send the frame out based on
871 * configuration in the TX control data. Must be implemented and
874 * @start: Called before the first netdevice attached to the hardware
875 * is enabled. This should turn on the hardware and must turn on
876 * frame reception (for possibly enabled monitor interfaces.)
877 * Returns negative error codes, these may be seen in userspace,
879 * When the device is started it should not have a MAC address
880 * to avoid acknowledging frames before a non-monitor device
882 * Must be implemented.
884 * @stop: Called after last netdevice attached to the hardware
885 * is disabled. This should turn off the hardware (at least
886 * it must turn off frame reception.)
887 * May be called right after add_interface if that rejects
889 * Must be implemented.
891 * @add_interface: Called when a netdevice attached to the hardware is
892 * enabled. Because it is not called for monitor mode devices, @open
893 * and @stop must be implemented.
894 * The driver should perform any initialization it needs before
895 * the device can be enabled. The initial configuration for the
896 * interface is given in the conf parameter.
897 * The callback may refuse to add an interface by returning a
898 * negative error code (which will be seen in userspace.)
899 * Must be implemented.
901 * @remove_interface: Notifies a driver that an interface is going down.
902 * The @stop callback is called after this if it is the last interface
903 * and no monitor interfaces are present.
904 * When all interfaces are removed, the MAC address in the hardware
905 * must be cleared so the device no longer acknowledges packets,
906 * the mac_addr member of the conf structure is, however, set to the
907 * MAC address of the device going away.
908 * Hence, this callback must be implemented.
910 * @config: Handler for configuration requests. IEEE 802.11 code calls this
911 * function to change hardware configuration, e.g., channel.
913 * @config_interface: Handler for configuration requests related to interfaces
914 * (e.g. BSSID changes.)
916 * @configure_filter: Configure the device's RX filter.
917 * See the section "Frame filtering" for more information.
918 * This callback must be implemented and atomic.
920 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon
921 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set)
922 * mac80211 calls this function when a TIM bit must be set or cleared
923 * for a given AID. Must be atomic.
925 * @set_key: See the section "Hardware crypto acceleration"
926 * This callback can sleep, and is only called between add_interface
927 * and remove_interface calls, i.e. while the interface with the
928 * given local_address is enabled.
930 * @set_ieee8021x: Enable/disable IEEE 802.1X. This item requests wlan card
931 * to pass unencrypted EAPOL-Key frames even when encryption is
932 * configured. If the wlan card does not require such a configuration,
933 * this function pointer can be set to NULL.
935 * @set_port_auth: Set port authorization state (IEEE 802.1X PAE) to be
936 * authorized (@authorized=1) or unauthorized (=0). This function can be
937 * used if the wlan hardware or low-level driver implements PAE.
938 * mac80211 will filter frames based on authorization state in any case,
939 * so this function pointer can be NULL if low-level driver does not
940 * require event notification about port state changes.
942 * @hw_scan: Ask the hardware to service the scan request, no need to start
943 * the scan state machine in stack.
945 * @get_stats: return low-level statistics
947 * @set_privacy_invoked: For devices that generate their own beacons and probe
948 * response or association responses this updates the state of privacy_invoked
949 * returns 0 for success or an error number.
951 * @get_sequence_counter: For devices that have internal sequence counters this
952 * callback allows mac80211 to access the current value of a counter.
953 * This callback seems not well-defined, tell us if you need it.
955 * @set_rts_threshold: Configuration of RTS threshold (if device needs it)
957 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if
958 * the device does fragmentation by itself; if this method is assigned then
959 * the stack will not do fragmentation.
961 * @set_retry_limit: Configuration of retry limits (if device needs it)
963 * @sta_table_notification: Number of STAs in STA table notification. Must
966 * @erp_ie_changed: Handle ERP IE change notifications. Must be atomic.
968 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
969 * bursting) for a hardware TX queue. The @queue parameter uses the
970 * %IEEE80211_TX_QUEUE_* constants. Must be atomic.
972 * @get_tx_stats: Get statistics of the current TX queue status. This is used
973 * to get number of currently queued packets (queue length), maximum queue
974 * size (limit), and total number of packets sent using each TX queue
975 * (count). This information is used for WMM to find out which TX
976 * queues have room for more packets and by hostapd to provide
977 * statistics about the current queueing state to external programs.
979 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
980 * this is only used for IBSS mode debugging and, as such, is not a
981 * required function. Must be atomic.
983 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
984 * with other STAs in the IBSS. This is only used in IBSS mode. This
985 * function is optional if the firmware/hardware takes full care of
986 * TSF synchronization.
988 * @beacon_update: Setup beacon data for IBSS beacons. Unlike access point,
989 * IBSS uses a fixed beacon frame which is configured using this
990 * function. This handler is required only for IBSS mode.
992 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
993 * This is needed only for IBSS mode and the result of this function is
994 * used to determine whether to reply to Probe Requests.
996 struct ieee80211_ops {
997 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb,
998 struct ieee80211_tx_control *control);
999 int (*start)(struct ieee80211_hw *hw);
1000 void (*stop)(struct ieee80211_hw *hw);
1001 int (*add_interface)(struct ieee80211_hw *hw,
1002 struct ieee80211_if_init_conf *conf);
1003 void (*remove_interface)(struct ieee80211_hw *hw,
1004 struct ieee80211_if_init_conf *conf);
1005 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
1006 int (*config_interface)(struct ieee80211_hw *hw,
1007 int if_id, struct ieee80211_if_conf *conf);
1008 void (*configure_filter)(struct ieee80211_hw *hw,
1009 unsigned int changed_flags,
1010 unsigned int *total_flags,
1011 int mc_count, struct dev_addr_list *mc_list);
1012 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set);
1013 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1014 const u8 *local_address, const u8 *address,
1015 struct ieee80211_key_conf *key);
1016 int (*set_ieee8021x)(struct ieee80211_hw *hw, int use_ieee8021x);
1017 int (*set_port_auth)(struct ieee80211_hw *hw, u8 *addr,
1019 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len);
1020 int (*get_stats)(struct ieee80211_hw *hw,
1021 struct ieee80211_low_level_stats *stats);
1022 int (*set_privacy_invoked)(struct ieee80211_hw *hw,
1023 int privacy_invoked);
1024 int (*get_sequence_counter)(struct ieee80211_hw *hw,
1025 u8* addr, u8 keyidx, u8 txrx,
1026 u32* iv32, u16* iv16);
1027 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
1028 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
1029 int (*set_retry_limit)(struct ieee80211_hw *hw,
1030 u32 short_retry, u32 long_retr);
1031 void (*sta_table_notification)(struct ieee80211_hw *hw,
1033 void (*erp_ie_changed)(struct ieee80211_hw *hw, u8 changes,
1034 int cts_protection, int preamble);
1035 int (*conf_tx)(struct ieee80211_hw *hw, int queue,
1036 const struct ieee80211_tx_queue_params *params);
1037 int (*get_tx_stats)(struct ieee80211_hw *hw,
1038 struct ieee80211_tx_queue_stats *stats);
1039 u64 (*get_tsf)(struct ieee80211_hw *hw);
1040 void (*reset_tsf)(struct ieee80211_hw *hw);
1041 int (*beacon_update)(struct ieee80211_hw *hw,
1042 struct sk_buff *skb,
1043 struct ieee80211_tx_control *control);
1044 int (*tx_last_beacon)(struct ieee80211_hw *hw);
1048 * ieee80211_alloc_hw - Allocate a new hardware device
1050 * This must be called once for each hardware device. The returned pointer
1051 * must be used to refer to this device when calling other functions.
1052 * mac80211 allocates a private data area for the driver pointed to by
1053 * @priv in &struct ieee80211_hw, the size of this area is given as
1056 * @priv_data_len: length of private data
1057 * @ops: callbacks for this device
1059 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1060 const struct ieee80211_ops *ops);
1063 * ieee80211_register_hw - Register hardware device
1065 * You must call this function before any other functions
1066 * except ieee80211_register_hwmode.
1068 * @hw: the device to register as returned by ieee80211_alloc_hw()
1070 int ieee80211_register_hw(struct ieee80211_hw *hw);
1072 #ifdef CONFIG_MAC80211_LEDS
1073 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
1074 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
1077 * ieee80211_get_tx_led_name - get name of TX LED
1079 * mac80211 creates a transmit LED trigger for each wireless hardware
1080 * that can be used to drive LEDs if your driver registers a LED device.
1081 * This function returns the name (or %NULL if not configured for LEDs)
1082 * of the trigger so you can automatically link the LED device.
1084 * @hw: the hardware to get the LED trigger name for
1086 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
1088 #ifdef CONFIG_MAC80211_LEDS
1089 return __ieee80211_get_tx_led_name(hw);
1096 * ieee80211_get_rx_led_name - get name of RX LED
1098 * mac80211 creates a receive LED trigger for each wireless hardware
1099 * that can be used to drive LEDs if your driver registers a LED device.
1100 * This function returns the name (or %NULL if not configured for LEDs)
1101 * of the trigger so you can automatically link the LED device.
1103 * @hw: the hardware to get the LED trigger name for
1105 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
1107 #ifdef CONFIG_MAC80211_LEDS
1108 return __ieee80211_get_rx_led_name(hw);
1114 /* Register a new hardware PHYMODE capability to the stack. */
1115 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1116 struct ieee80211_hw_mode *mode);
1119 * ieee80211_unregister_hw - Unregister a hardware device
1121 * This function instructs mac80211 to free allocated resources
1122 * and unregister netdevices from the networking subsystem.
1124 * @hw: the hardware to unregister
1126 void ieee80211_unregister_hw(struct ieee80211_hw *hw);
1129 * ieee80211_free_hw - free hardware descriptor
1131 * This function frees everything that was allocated, including the
1132 * private data for the driver. You must call ieee80211_unregister_hw()
1133 * before calling this function
1135 * @hw: the hardware to free
1137 void ieee80211_free_hw(struct ieee80211_hw *hw);
1139 /* trick to avoid symbol clashes with the ieee80211 subsystem */
1140 void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
1141 struct ieee80211_rx_status *status);
1144 * ieee80211_rx - receive frame
1146 * Use this function to hand received frames to mac80211. The receive
1147 * buffer in @skb must start with an IEEE 802.11 header or a radiotap
1148 * header if %RX_FLAG_RADIOTAP is set in the @status flags.
1150 * This function may not be called in IRQ context.
1152 * @hw: the hardware this frame came in on
1153 * @skb: the buffer to receive, owned by mac80211 after this call
1154 * @status: status of this frame; the status pointer need not be valid
1155 * after this function returns
1157 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
1158 struct ieee80211_rx_status *status)
1160 __ieee80211_rx(hw, skb, status);
1164 * ieee80211_rx_irqsafe - receive frame
1166 * Like ieee80211_rx() but can be called in IRQ context
1167 * (internally defers to a workqueue.)
1169 * @hw: the hardware this frame came in on
1170 * @skb: the buffer to receive, owned by mac80211 after this call
1171 * @status: status of this frame; the status pointer need not be valid
1172 * after this function returns and is not freed by mac80211,
1173 * it is recommended that it points to a stack area
1175 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
1176 struct sk_buff *skb,
1177 struct ieee80211_rx_status *status);
1180 * ieee80211_tx_status - transmit status callback
1182 * Call this function for all transmitted frames after they have been
1183 * transmitted. It is permissible to not call this function for
1184 * multicast frames but this can affect statistics.
1186 * @hw: the hardware the frame was transmitted by
1187 * @skb: the frame that was transmitted, owned by mac80211 after this call
1188 * @status: status information for this frame; the status pointer need not
1189 * be valid after this function returns and is not freed by mac80211,
1190 * it is recommended that it points to a stack area
1192 void ieee80211_tx_status(struct ieee80211_hw *hw,
1193 struct sk_buff *skb,
1194 struct ieee80211_tx_status *status);
1195 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1196 struct sk_buff *skb,
1197 struct ieee80211_tx_status *status);
1200 * ieee80211_beacon_get - beacon generation function
1201 * @hw: pointer obtained from ieee80211_alloc_hw().
1202 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1203 * @control: will be filled with information needed to send this beacon.
1205 * If the beacon frames are generated by the host system (i.e., not in
1206 * hardware/firmware), the low-level driver uses this function to receive
1207 * the next beacon frame from the 802.11 code. The low-level is responsible
1208 * for calling this function before beacon data is needed (e.g., based on
1209 * hardware interrupt). Returned skb is used only once and low-level driver
1210 * is responsible of freeing it.
1212 struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
1214 struct ieee80211_tx_control *control);
1217 * ieee80211_rts_get - RTS frame generation function
1218 * @hw: pointer obtained from ieee80211_alloc_hw().
1219 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1220 * @frame: pointer to the frame that is going to be protected by the RTS.
1221 * @frame_len: the frame length (in octets).
1222 * @frame_txctl: &struct ieee80211_tx_control of the frame.
1223 * @rts: The buffer where to store the RTS frame.
1225 * If the RTS frames are generated by the host system (i.e., not in
1226 * hardware/firmware), the low-level driver uses this function to receive
1227 * the next RTS frame from the 802.11 code. The low-level is responsible
1228 * for calling this function before and RTS frame is needed.
1230 void ieee80211_rts_get(struct ieee80211_hw *hw, int if_id,
1231 const void *frame, size_t frame_len,
1232 const struct ieee80211_tx_control *frame_txctl,
1233 struct ieee80211_rts *rts);
1236 * ieee80211_rts_duration - Get the duration field for an RTS frame
1237 * @hw: pointer obtained from ieee80211_alloc_hw().
1238 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1239 * @frame_len: the length of the frame that is going to be protected by the RTS.
1240 * @frame_txctl: &struct ieee80211_tx_control of the frame.
1242 * If the RTS is generated in firmware, but the host system must provide
1243 * the duration field, the low-level driver uses this function to receive
1244 * the duration field value in little-endian byteorder.
1246 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, int if_id,
1248 const struct ieee80211_tx_control *frame_txctl);
1251 * ieee80211_ctstoself_get - CTS-to-self frame generation function
1252 * @hw: pointer obtained from ieee80211_alloc_hw().
1253 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1254 * @frame: pointer to the frame that is going to be protected by the CTS-to-self.
1255 * @frame_len: the frame length (in octets).
1256 * @frame_txctl: &struct ieee80211_tx_control of the frame.
1257 * @cts: The buffer where to store the CTS-to-self frame.
1259 * If the CTS-to-self frames are generated by the host system (i.e., not in
1260 * hardware/firmware), the low-level driver uses this function to receive
1261 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible
1262 * for calling this function before and CTS-to-self frame is needed.
1264 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, int if_id,
1265 const void *frame, size_t frame_len,
1266 const struct ieee80211_tx_control *frame_txctl,
1267 struct ieee80211_cts *cts);
1270 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
1271 * @hw: pointer obtained from ieee80211_alloc_hw().
1272 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1273 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
1274 * @frame_txctl: &struct ieee80211_tx_control of the frame.
1276 * If the CTS-to-self is generated in firmware, but the host system must provide
1277 * the duration field, the low-level driver uses this function to receive
1278 * the duration field value in little-endian byteorder.
1280 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, int if_id,
1282 const struct ieee80211_tx_control *frame_txctl);
1285 * ieee80211_generic_frame_duration - Calculate the duration field for a frame
1286 * @hw: pointer obtained from ieee80211_alloc_hw().
1287 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1288 * @frame_len: the length of the frame.
1289 * @rate: the rate (in 100kbps) at which the frame is going to be transmitted.
1291 * Calculate the duration field of some generic frame, given its
1292 * length and transmission rate (in 100kbps).
1294 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, int if_id,
1299 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
1300 * @hw: pointer as obtained from ieee80211_alloc_hw().
1301 * @if_id: interface ID from &struct ieee80211_if_init_conf.
1302 * @control: will be filled with information needed to send returned frame.
1304 * Function for accessing buffered broadcast and multicast frames. If
1305 * hardware/firmware does not implement buffering of broadcast/multicast
1306 * frames when power saving is used, 802.11 code buffers them in the host
1307 * memory. The low-level driver uses this function to fetch next buffered
1308 * frame. In most cases, this is used when generating beacon frame. This
1309 * function returns a pointer to the next buffered skb or NULL if no more
1310 * buffered frames are available.
1312 * Note: buffered frames are returned only after DTIM beacon frame was
1313 * generated with ieee80211_beacon_get() and the low-level driver must thus
1314 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
1315 * NULL if the previous generated beacon was not DTIM, so the low-level driver
1316 * does not need to check for DTIM beacons separately and should be able to
1317 * use common code for all beacons.
1320 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id,
1321 struct ieee80211_tx_control *control);
1324 * ieee80211_get_hdrlen_from_skb - get header length from data
1326 * Given an skb with a raw 802.11 header at the data pointer this function
1327 * returns the 802.11 header length in bytes (not including encryption
1328 * headers). If the data in the sk_buff is too short to contain a valid 802.11
1329 * header the function returns 0.
1333 int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
1336 * ieee80211_get_hdrlen - get header length from frame control
1338 * This function returns the 802.11 header length in bytes (not including
1339 * encryption headers.)
1341 * @fc: the frame control field (in CPU endianness)
1343 int ieee80211_get_hdrlen(u16 fc);
1346 * ieee80211_wake_queue - wake specific queue
1347 * @hw: pointer as obtained from ieee80211_alloc_hw().
1348 * @queue: queue number (counted from zero).
1350 * Drivers should use this function instead of netif_wake_queue.
1352 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
1355 * ieee80211_stop_queue - stop specific queue
1356 * @hw: pointer as obtained from ieee80211_alloc_hw().
1357 * @queue: queue number (counted from zero).
1359 * Drivers should use this function instead of netif_stop_queue.
1361 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
1364 * ieee80211_start_queues - start all queues
1365 * @hw: pointer to as obtained from ieee80211_alloc_hw().
1367 * Drivers should use this function instead of netif_start_queue.
1369 void ieee80211_start_queues(struct ieee80211_hw *hw);
1372 * ieee80211_stop_queues - stop all queues
1373 * @hw: pointer as obtained from ieee80211_alloc_hw().
1375 * Drivers should use this function instead of netif_stop_queue.
1377 void ieee80211_stop_queues(struct ieee80211_hw *hw);
1380 * ieee80211_wake_queues - wake all queues
1381 * @hw: pointer as obtained from ieee80211_alloc_hw().
1383 * Drivers should use this function instead of netif_wake_queue.
1385 void ieee80211_wake_queues(struct ieee80211_hw *hw);
1388 * ieee80211_scan_completed - completed hardware scan
1390 * When hardware scan offload is used (i.e. the hw_scan() callback is
1391 * assigned) this function needs to be called by the driver to notify
1392 * mac80211 that the scan finished.
1394 * @hw: the hardware that finished the scan
1396 void ieee80211_scan_completed(struct ieee80211_hw *hw);
1398 #endif /* MAC80211_H */