mac80211.h 73.3 KB
Newer Older
1
/*
2 3
 * mac80211 <-> driver interface
 *
4 5
 * Copyright 2002-2005, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
Johannes Berg's avatar
Johannes Berg committed
6
 * Copyright 2007-2008	Johannes Berg <johannes@sipsolutions.net>
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef MAC80211_H
#define MAC80211_H

#include <linux/kernel.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/wireless.h>
#include <linux/device.h>
#include <linux/ieee80211.h>
#include <net/wireless.h>
#include <net/cfg80211.h>

25 26 27 28 29 30 31 32 33 34 35 36 37
/**
 * DOC: Introduction
 *
 * mac80211 is the Linux stack for 802.11 hardware that implements
 * only partial functionality in hard- or firmware. This document
 * defines the interface between mac80211 and low-level hardware
 * drivers.
 */

/**
 * DOC: Calling mac80211 from interrupts
 *
 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
38 39 40
 * called in hardware interrupt context. The low-level driver must not call any
 * other functions in hardware interrupt context. If there is a need for such
 * call, the low-level driver should first ACK the interrupt and perform the
41 42 43 44
 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
 * tasklet function.
 *
 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also
45
 *	 use the non-IRQ-safe functions!
46 47
 */

48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73
/**
 * DOC: Warning
 *
 * If you're reading this document and not the header file itself, it will
 * be incomplete because not all documentation has been converted yet.
 */

/**
 * DOC: Frame format
 *
 * As a general rule, when frames are passed between mac80211 and the driver,
 * they start with the IEEE 802.11 header and include the same octets that are
 * sent over the air except for the FCS which should be calculated by the
 * hardware.
 *
 * There are, however, various exceptions to this rule for advanced features:
 *
 * The first exception is for hardware encryption and decryption offload
 * where the IV/ICV may or may not be generated in hardware.
 *
 * Secondly, when the hardware handles fragmentation, the frame handed to
 * the driver from mac80211 is the MSDU, not the MPDU.
 *
 * Finally, for received frames, the driver is able to indicate that it has
 * filled a radiotap header and put that in front of the frame; if it does
 * not do so then mac80211 may add this under certain circumstances.
74 75
 */

76
/**
77 78 79
 * struct ieee80211_ht_bss_info - describing BSS's HT characteristics
 *
 * This structure describes most essential parameters needed
80
 * to describe 802.11n HT characteristics in a BSS.
81 82 83 84
 *
 * @primary_channel: channel number of primery channel
 * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width)
 * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection)
85
 */
86 87 88 89
struct ieee80211_ht_bss_info {
	u8 primary_channel;
	u8 bss_cap;  /* use IEEE80211_HT_IE_CHA_ */
	u8 bss_op_mode; /* use IEEE80211_HT_IE_ */
90 91
};

Johannes Berg's avatar
Johannes Berg committed
92 93 94 95 96 97 98 99 100 101 102 103
/**
 * enum ieee80211_max_queues - maximum number of queues
 *
 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
 * @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable
 *	for A-MPDU operation.
 */
enum ieee80211_max_queues {
	IEEE80211_MAX_QUEUES =		16,
	IEEE80211_MAX_AMPDU_QUEUES =	16,
};

104 105 106 107
/**
 * struct ieee80211_tx_queue_params - transmit queue configuration
 *
 * The information provided in this structure is required for QoS
108
 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
109
 *
110
 * @aifs: arbitration interframe space [0..255]
111 112
 * @cw_min: minimum contention window [a value of the form
 *	2^n-1 in the range 1..32767]
113
 * @cw_max: maximum contention window [like @cw_min]
114
 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
115
 */
116
struct ieee80211_tx_queue_params {
117
	u16 txop;
118 119
	u16 cw_min;
	u16 cw_max;
120
	u8 aifs;
121 122
};

123
/**
124
 * struct ieee80211_tx_queue_stats - transmit queue statistics
125 126 127 128 129
 *
 * @len: number of packets in queue
 * @limit: queue length limit
 * @count: number of frames sent
 */
130
struct ieee80211_tx_queue_stats {
131 132 133
	unsigned int len;
	unsigned int limit;
	unsigned int count;
134 135 136 137 138 139 140 141 142
};

struct ieee80211_low_level_stats {
	unsigned int dot11ACKFailureCount;
	unsigned int dot11RTSFailureCount;
	unsigned int dot11FCSErrorCount;
	unsigned int dot11RTSSuccessCount;
};

143 144 145 146 147 148 149 150 151 152
/**
 * enum ieee80211_bss_change - BSS change notification flags
 *
 * These flags are used with the bss_info_changed() callback
 * to indicate which BSS parameter changed.
 *
 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
 *	also implies a change in the AID.
 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
153
 * @BSS_CHANGED_ERP_SLOT: slot timing changed
Tomas Winkler's avatar
Tomas Winkler committed
154
 * @BSS_CHANGED_HT: 802.11n parameters changed
155
 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
156 157 158 159 160
 */
enum ieee80211_bss_change {
	BSS_CHANGED_ASSOC		= 1<<0,
	BSS_CHANGED_ERP_CTS_PROT	= 1<<1,
	BSS_CHANGED_ERP_PREAMBLE	= 1<<2,
161
	BSS_CHANGED_ERP_SLOT		= 1<<3,
Tomas Winkler's avatar
Tomas Winkler committed
162
	BSS_CHANGED_HT                  = 1<<4,
163
	BSS_CHANGED_BASIC_RATES		= 1<<5,
164 165
};

Johannes Berg's avatar
Johannes Berg committed
166 167 168 169 170 171 172 173
/**
 * struct ieee80211_bss_ht_conf - BSS's changing HT configuration
 * @operation_mode: HT operation mode (like in &struct ieee80211_ht_info)
 */
struct ieee80211_bss_ht_conf {
	u16 operation_mode;
};

174 175 176 177 178 179 180 181 182
/**
 * struct ieee80211_bss_conf - holds the BSS's changing parameters
 *
 * This structure keeps information about a BSS (and an association
 * to that BSS) that can change during the lifetime of the BSS.
 *
 * @assoc: association status
 * @aid: association ID number, valid only when @assoc is true
 * @use_cts_prot: use CTS protection
183 184 185 186 187 188
 * @use_short_preamble: use 802.11b short preamble;
 *	if the hardware cannot handle this it must set the
 *	IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag
 * @use_short_slot: use short slot time (only relevant for ERP);
 *	if the hardware cannot handle this it must set the
 *	IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag
189
 * @dtim_period: num of beacons before the next DTIM, for PSM
190 191
 * @timestamp: beacon timestamp
 * @beacon_int: beacon interval
192
 * @assoc_capability: capabilities taken from assoc resp
Johannes Berg's avatar
Johannes Berg committed
193
 * @ht: BSS's HT configuration
194 195 196
 * @basic_rates: bitmap of basic rates, each bit stands for an
 *	index into the rate table configured by the driver in
 *	the current band.
197 198 199 200 201 202 203 204
 */
struct ieee80211_bss_conf {
	/* association related data */
	bool assoc;
	u16 aid;
	/* erp related data */
	bool use_cts_prot;
	bool use_short_preamble;
205
	bool use_short_slot;
206
	u8 dtim_period;
207 208 209
	u16 beacon_int;
	u16 assoc_capability;
	u64 timestamp;
210
	u32 basic_rates;
Johannes Berg's avatar
Johannes Berg committed
211
	struct ieee80211_bss_ht_conf ht;
212 213
};

214
/**
215
 * enum mac80211_tx_control_flags - flags to describe transmission information/status
216
 *
217
 * These flags are used with the @flags member of &ieee80211_tx_info.
218 219
 *
 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame.
220 221 222 223 224 225 226 227 228 229 230
 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
 *	number to this frame, taking care of not overwriting the fragment
 *	number and increasing the sequence number only when the
 *	IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
 *	assign sequence numbers to QoS-data frames but cannot do so correctly
 *	for non-QoS-data and management frames because beacons need them from
 *	that counter as well and mac80211 cannot guarantee proper sequencing.
 *	If this flag is set, the driver should instruct the hardware to
 *	assign a sequence number to the frame or assign one itself. Cf. IEEE
 *	802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
 *	beacons and always be clear for frames without a sequence number field.
231 232 233 234 235 236
 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
 *	station
 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
237
 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211.
238 239 240 241 242
 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
 *	because the destination STA was in powersave mode.
 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged
 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
 * 	is for the whole aggregation.
243 244
 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
 * 	so consider using block ack request (BAR).
245 246 247
 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
 *	set by rate control algorithms to indicate probe rate, will
 *	be cleared for fragmented frames (except on the last fragment)
248 249
 */
enum mac80211_tx_control_flags {
250
	IEEE80211_TX_CTL_REQ_TX_STATUS		= BIT(0),
251 252 253 254 255 256 257 258 259 260 261 262
	IEEE80211_TX_CTL_ASSIGN_SEQ		= BIT(1),
	IEEE80211_TX_CTL_NO_ACK			= BIT(2),
	IEEE80211_TX_CTL_CLEAR_PS_FILT		= BIT(3),
	IEEE80211_TX_CTL_FIRST_FRAGMENT		= BIT(4),
	IEEE80211_TX_CTL_SEND_AFTER_DTIM	= BIT(5),
	IEEE80211_TX_CTL_AMPDU			= BIT(6),
	IEEE80211_TX_CTL_INJECTED		= BIT(7),
	IEEE80211_TX_STAT_TX_FILTERED		= BIT(8),
	IEEE80211_TX_STAT_ACK			= BIT(9),
	IEEE80211_TX_STAT_AMPDU			= BIT(10),
	IEEE80211_TX_STAT_AMPDU_NO_BACK		= BIT(11),
	IEEE80211_TX_CTL_RATE_CTRL_PROBE	= BIT(12),
263 264
};

265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
enum mac80211_rate_control_flags {
	IEEE80211_TX_RC_USE_RTS_CTS		= BIT(0),
	IEEE80211_TX_RC_USE_CTS_PROTECT		= BIT(1),
	IEEE80211_TX_RC_USE_SHORT_PREAMBLE	= BIT(2),

	/* rate index is an MCS rate number instead of an index */
	IEEE80211_TX_RC_MCS			= BIT(3),
	IEEE80211_TX_RC_GREEN_FIELD		= BIT(4),
	IEEE80211_TX_RC_40_MHZ_WIDTH		= BIT(5),
	IEEE80211_TX_RC_DUP_DATA		= BIT(6),
	IEEE80211_TX_RC_SHORT_GI		= BIT(7),
};


/* there are 40 bytes if you don't need the rateset to be kept */
#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40
281

282 283
/* if you do need the rateset, then you have less space */
#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24
284

285 286
/* maximum number of rate stages */
#define IEEE80211_TX_MAX_RATES	5
287 288

/**
289
 * struct ieee80211_tx_rate - rate selection/status
290
 *
291 292
 * @idx: rate index to attempt to send with
 * @flags: rate control flags (&enum mac80211_rate_control_flags)
293
 * @count: number of tries in this rate before going to the next rate
294 295 296 297 298 299
 *
 * A value of -1 for @idx indicates an invalid rate and, if used
 * in an array of retry rates, that no more rates should be tried.
 *
 * When used for transmit status reporting, the driver should
 * always report the rate along with the flags it used.
300
 */
301 302 303 304
struct ieee80211_tx_rate {
	s8 idx;
	u8 count;
	u8 flags;
305
} __attribute__((packed));
306

307 308 309 310 311 312 313 314
/**
 * struct ieee80211_tx_info - skb transmit information
 *
 * This structure is placed in skb->cb for three uses:
 *  (1) mac80211 TX control - mac80211 tells the driver what to do
 *  (2) driver internal use (if applicable)
 *  (3) TX status information - driver tells mac80211 what happened
 *
315 316 317
 * The TX control's sta pointer is only valid during the ->tx call,
 * it may be NULL.
 *
318
 * @flags: transmit info flags, defined above
319
 * @band: the band to transmit on (use for checking for races)
320
 * @antenna_sel_tx: antenna to use, 0 for automatic diversity
321
 * @pad: padding, ignore
322 323 324
 * @control: union for control data
 * @status: union for status data
 * @driver_data: array of driver_data pointers
325 326 327 328 329
 * @ampdu_ack_len: number of aggregated frames.
 * 	relevant only if IEEE80211_TX_STATUS_AMPDU was set.
 * @ampdu_ack_map: block ack bit map for the aggregation.
 * 	relevant only if IEEE80211_TX_STATUS_AMPDU was set.
 * @ack_signal: signal strength of the ACK frame
330
 */
331 332 333 334
struct ieee80211_tx_info {
	/* common information */
	u32 flags;
	u8 band;
335

336
	u8 antenna_sel_tx;
337

338
	/* 2 byte hole */
339
	u8 pad[2];
340 341 342

	union {
		struct {
343 344 345 346 347 348 349 350 351 352
			union {
				/* rate control */
				struct {
					struct ieee80211_tx_rate rates[
						IEEE80211_TX_MAX_RATES];
					s8 rts_cts_rate_idx;
				};
				/* only needed before rate control */
				unsigned long jiffies;
			};
353
			/* NB: vif can be NULL for injected frames */
354 355
			struct ieee80211_vif *vif;
			struct ieee80211_key_conf *hw_key;
356
			struct ieee80211_sta *sta;
357 358
		} control;
		struct {
359 360
			struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES];
			u8 ampdu_ack_len;
361 362
			u64 ampdu_ack_map;
			int ack_signal;
363
			/* 8 bytes free */
364
		} status;
365 366 367 368 369 370 371 372
		struct {
			struct ieee80211_tx_rate driver_rates[
				IEEE80211_TX_MAX_RATES];
			void *rate_driver_data[
				IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)];
		};
		void *driver_data[
			IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)];
373
	};
374 375
};

376 377 378 379
static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
{
	return (struct ieee80211_tx_info *)skb->cb;
}
380

381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415
/**
 * ieee80211_tx_info_clear_status - clear TX status
 *
 * @info: The &struct ieee80211_tx_info to be cleared.
 *
 * When the driver passes an skb back to mac80211, it must report
 * a number of things in TX status. This function clears everything
 * in the TX status but the rate control information (it does clear
 * the count since you need to fill that in anyway).
 *
 * NOTE: You can only use this function if you do NOT use
 *	 info->driver_data! Use info->rate_driver_data
 *	 instead if you need only the less space that allows.
 */
static inline void
ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
{
	int i;

	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
		     offsetof(struct ieee80211_tx_info, control.rates));
	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
		     offsetof(struct ieee80211_tx_info, driver_rates));
	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8);
	/* clear the rate counts */
	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++)
		info->status.rates[i].count = 0;

	BUILD_BUG_ON(
	    offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23);
	memset(&info->status.ampdu_ack_len, 0,
	       sizeof(struct ieee80211_tx_info) -
	       offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
}

416 417 418 419 420 421 422 423 424 425 426 427 428 429

/**
 * enum mac80211_rx_flags - receive flags
 *
 * These flags are used with the @flag member of &struct ieee80211_rx_status.
 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
 *	Use together with %RX_FLAG_MMIC_STRIPPED.
 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header.
 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
 *	verification has been done by the hardware.
 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
 *	If this flag is set, the stack cannot do any replay detection
 *	hence the driver or hardware will have to do that.
430 431 432 433
 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
 *	the frame.
 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
 *	the frame.
434
 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field)
Bruno Randolf's avatar
Bruno Randolf committed
435 436
 *	is valid. This is useful in monitor mode and necessary for beacon frames
 *	to enable IBSS merging.
437
 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame
438 439 440
 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index
 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used
 * @RX_FLAG_SHORT_GI: Short guard interval was used
441 442 443 444 445 446 447
 */
enum mac80211_rx_flags {
	RX_FLAG_MMIC_ERROR	= 1<<0,
	RX_FLAG_DECRYPTED	= 1<<1,
	RX_FLAG_RADIOTAP	= 1<<2,
	RX_FLAG_MMIC_STRIPPED	= 1<<3,
	RX_FLAG_IV_STRIPPED	= 1<<4,
448 449
	RX_FLAG_FAILED_FCS_CRC	= 1<<5,
	RX_FLAG_FAILED_PLCP_CRC = 1<<6,
450
	RX_FLAG_TSFT		= 1<<7,
451 452 453 454
	RX_FLAG_SHORTPRE	= 1<<8,
	RX_FLAG_HT		= 1<<9,
	RX_FLAG_40MHZ		= 1<<10,
	RX_FLAG_SHORT_GI	= 1<<11,
455 456 457 458 459 460 461 462
};

/**
 * struct ieee80211_rx_status - receive status
 *
 * The low-level driver should provide this information (the subset
 * supported by hardware) to the 802.11 code with each received
 * frame.
463
 *
464 465
 * @mactime: value in microseconds of the 64-bit Time Synchronization Function
 * 	(TSF) timer when the first data symbol (MPDU) arrived at the hardware.
466
 * @band: the active band when this frame was received
467
 * @freq: frequency the radio was tuned to when receiving this frame, in MHz
468 469 470 471 472
 * @signal: signal strength when receiving this frame, either in dBm, in dB or
 *	unspecified depending on the hardware capabilities flags
 *	@IEEE80211_HW_SIGNAL_*
 * @noise: noise when receiving this frame, in dBm.
 * @qual: overall signal quality indication, in percent (0-100).
473
 * @antenna: antenna used
474 475
 * @rate_idx: index of data rate into band's supported rates or MCS index if
 *	HT rates are use (RX_FLAG_HT)
476 477
 * @flag: %RX_FLAG_*
 */
478 479
struct ieee80211_rx_status {
	u64 mactime;
480
	enum ieee80211_band band;
481 482
	int freq;
	int signal;
483
	int noise;
484
	int qual;
485
	int antenna;
486
	int rate_idx;
487 488 489
	int flag;
};

490 491 492 493 494 495
/**
 * enum ieee80211_conf_flags - configuration flags
 *
 * Flags to define PHY configuration options
 *
 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
496
 * @IEEE80211_CONF_PS: Enable 802.11 power save mode
497 498
 */
enum ieee80211_conf_flags {
499
	IEEE80211_CONF_RADIOTAP		= (1<<0),
Johannes Berg's avatar
Johannes Berg committed
500
	IEEE80211_CONF_PS		= (1<<1),
501
};
502

503 504 505 506 507 508 509
/* XXX: remove all this once drivers stop trying to use it */
static inline int __deprecated __IEEE80211_CONF_SHORT_SLOT_TIME(void)
{
	return 0;
}
#define IEEE80211_CONF_SHORT_SLOT_TIME (__IEEE80211_CONF_SHORT_SLOT_TIME())

510 511 512 513 514 515 516 517
/**
 * enum ieee80211_conf_changed - denotes which configuration changed
 *
 * @IEEE80211_CONF_CHANGE_RADIO_ENABLED: the value of radio_enabled changed
 * @IEEE80211_CONF_CHANGE_BEACON_INTERVAL: the beacon interval changed
 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
 * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed
 * @IEEE80211_CONF_CHANGE_PS: the PS flag changed
518
 * @IEEE80211_CONF_CHANGE_DYNPS_TIMEOUT: the dynamic PS timeout changed
519
 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
520
 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed
521
 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
522 523 524 525 526 527 528
 */
enum ieee80211_conf_changed {
	IEEE80211_CONF_CHANGE_RADIO_ENABLED	= BIT(0),
	IEEE80211_CONF_CHANGE_BEACON_INTERVAL	= BIT(1),
	IEEE80211_CONF_CHANGE_LISTEN_INTERVAL	= BIT(2),
	IEEE80211_CONF_CHANGE_RADIOTAP		= BIT(3),
	IEEE80211_CONF_CHANGE_PS		= BIT(4),
529 530 531 532
	IEEE80211_CONF_CHANGE_DYNPS_TIMEOUT	= BIT(5),
	IEEE80211_CONF_CHANGE_POWER		= BIT(6),
	IEEE80211_CONF_CHANGE_CHANNEL		= BIT(7),
	IEEE80211_CONF_CHANGE_RETRY_LIMITS	= BIT(8),
533 534
};

535 536 537 538 539 540
/**
 * struct ieee80211_conf - configuration of the device
 *
 * This struct indicates how the driver shall configure the hardware.
 *
 * @radio_enabled: when zero, driver is required to switch off the radio.
541
 * @beacon_int: beacon interval (TODO make interface config)
542
 * @listen_interval: listen interval in units of beacon interval
543
 * @flags: configuration flags defined above
544
 * @power_level: requested transmit power (in dBm)
545
 * @dynamic_ps_timeout: dynamic powersave timeout (in ms)
546
 * @channel: the channel to tune to
547
 * @channel_type: the channel (HT) type
548 549 550 551 552 553
 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
 *    (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
 *    but actually means the number of transmissions not the number of retries
 * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
 *    frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
 *    number of transmissions not the number of retries
554 555 556
 */
struct ieee80211_conf {
	int beacon_int;
557
	u32 flags;
558
	int power_level, dynamic_ps_timeout;
559

560 561 562
	u16 listen_interval;
	bool radio_enabled;

563 564
	u8 long_frame_max_tx_count, short_frame_max_tx_count;

565
	struct ieee80211_channel *channel;
566
	enum nl80211_channel_type channel_type;
567 568
};

569 570 571 572 573 574
/**
 * struct ieee80211_vif - per-interface data
 *
 * Data in this structure is continually present for driver
 * use during the life of a virtual interface.
 *
575
 * @type: type of this virtual interface
576 577
 * @bss_conf: BSS configuration for this interface, either our own
 *	or the BSS we're associated to
578 579 580 581
 * @drv_priv: data area for driver use, will always be aligned to
 *	sizeof(void *).
 */
struct ieee80211_vif {
582
	enum nl80211_iftype type;
583
	struct ieee80211_bss_conf bss_conf;
584 585 586 587
	/* must be last */
	u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
};

Johannes Berg's avatar
Johannes Berg committed
588 589 590
static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
{
#ifdef CONFIG_MAC80211_MESH
591
	return vif->type == NL80211_IFTYPE_MESH_POINT;
Johannes Berg's avatar
Johannes Berg committed
592 593 594 595
#endif
	return false;
}

596 597 598
/**
 * struct ieee80211_if_init_conf - initial configuration of an interface
 *
599 600 601
 * @vif: pointer to a driver-use per-interface structure. The pointer
 *	itself is also used for various functions including
 *	ieee80211_beacon_get() and ieee80211_get_buffered_bc().
602
 * @type: one of &enum nl80211_iftype constants. Determines the type of
603 604 605 606 607 608 609
 *	added/removed interface.
 * @mac_addr: pointer to MAC address of the interface. This pointer is valid
 *	until the interface is removed (i.e. it cannot be used after
 *	remove_interface() callback was called for this interface).
 *
 * This structure is used in add_interface() and remove_interface()
 * callbacks of &struct ieee80211_hw.
610 611 612 613 614 615
 *
 * When you allow multiple interfaces to be added to your PHY, take care
 * that the hardware can actually handle multiple MAC addresses. However,
 * also take care that when there's no interface left with mac_addr != %NULL
 * you remove the MAC address from the device to avoid acknowledging packets
 * in pure monitor mode.
616 617
 */
struct ieee80211_if_init_conf {
618
	enum nl80211_iftype type;
619
	struct ieee80211_vif *vif;
620 621 622
	void *mac_addr;
};

623 624 625 626 627 628 629 630 631
/**
 * enum ieee80211_if_conf_change - interface config change flags
 *
 * @IEEE80211_IFCC_BSSID: The BSSID changed.
 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed
 *	(currently AP and MESH only), use ieee80211_beacon_get().
 */
enum ieee80211_if_conf_change {
	IEEE80211_IFCC_BSSID	= BIT(0),
632
	IEEE80211_IFCC_BEACON	= BIT(1),
633 634
};

635 636 637
/**
 * struct ieee80211_if_conf - configuration of an interface
 *
638
 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change.
639 640 641 642 643 644
 * @bssid: BSSID of the network we are associated to/creating.
 *
 * This structure is passed to the config_interface() callback of
 * &struct ieee80211_hw.
 */
struct ieee80211_if_conf {
645
	u32 changed;
646
	const u8 *bssid;
647 648
};

649 650 651 652 653
/**
 * enum ieee80211_key_alg - key algorithm
 * @ALG_WEP: WEP40 or WEP104
 * @ALG_TKIP: TKIP
 * @ALG_CCMP: CCMP (AES)
654
 * @ALG_AES_CMAC: AES-128-CMAC
655
 */
656
enum ieee80211_key_alg {
657 658 659
	ALG_WEP,
	ALG_TKIP,
	ALG_CCMP,
660
	ALG_AES_CMAC,
661
};
662

663 664
/**
 * enum ieee80211_key_len - key length
665 666
 * @LEN_WEP40: WEP 5-byte long key
 * @LEN_WEP104: WEP 13-byte long key
667 668 669 670 671
 */
enum ieee80211_key_len {
	LEN_WEP40 = 5,
	LEN_WEP104 = 13,
};
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686

/**
 * enum ieee80211_key_flags - key flags
 *
 * These flags are used for communication about keys between the driver
 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
 *
 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
 *	that the STA this key will be used with could be using QoS.
 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
 *	driver to indicate that it requires IV generation for this
 *	particular key.
 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
 *	the driver for a TKIP key if it requires Michael MIC
 *	generation in software.
687 688
 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
 *	that the key is pairwise rather then a shared key.
689 690 691
 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a
 *	CCMP key if it requires CCMP encryption of management frames (MFP) to
 *	be done in software.
692
 */
693 694 695 696
enum ieee80211_key_flags {
	IEEE80211_KEY_FLAG_WMM_STA	= 1<<0,
	IEEE80211_KEY_FLAG_GENERATE_IV	= 1<<1,
	IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
697
	IEEE80211_KEY_FLAG_PAIRWISE	= 1<<3,
698
	IEEE80211_KEY_FLAG_SW_MGMT	= 1<<4,
699
};
700

701 702 703 704 705 706 707 708
/**
 * struct ieee80211_key_conf - key information
 *
 * This key information is given by mac80211 to the driver by
 * the set_key() callback in &struct ieee80211_ops.
 *
 * @hw_key_idx: To be set by the driver, this is the key index the driver
 *	wants to be given when a frame is transmitted and needs to be
709
 *	encrypted in hardware.
710 711 712 713
 * @alg: The key algorithm.
 * @flags: key flags, see &enum ieee80211_key_flags.
 * @keyidx: the key index (0-3)
 * @keylen: key material length
714 715 716 717 718
 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte)
 * 	data block:
 * 	- Temporal Encryption Key (128 bits)
 * 	- Temporal Authenticator Tx MIC Key (64 bits)
 * 	- Temporal Authenticator Rx MIC Key (64 bits)
719 720
 * @icv_len: The ICV length for this key type
 * @iv_len: The IV length for this key type
721
 */
722
struct ieee80211_key_conf {
723
	enum ieee80211_key_alg alg;
724 725
	u8 icv_len;
	u8 iv_len;
726
	u8 hw_key_idx;
727 728 729
	u8 flags;
	s8 keyidx;
	u8 keylen;
730 731 732
	u8 key[0];
};

733 734 735 736 737 738 739 740 741
/**
 * enum set_key_cmd - key command
 *
 * Used with the set_key() callback in &struct ieee80211_ops, this
 * indicates whether a key is being removed or added.
 *
 * @SET_KEY: a key is set
 * @DISABLE_KEY: a key must be disabled
 */
742
enum set_key_cmd {
743
	SET_KEY, DISABLE_KEY,
744
};
745

746 747 748 749 750 751 752 753 754 755 756 757
/**
 * struct ieee80211_sta - station table entry
 *
 * A station table entry represents a station we are possibly
 * communicating with. Since stations are RCU-managed in
 * mac80211, any ieee80211_sta pointer you get access to must
 * either be protected by rcu_read_lock() explicitly or implicitly,
 * or you must take good care to not use such a pointer after a
 * call to your sta_notify callback that removed it.
 *
 * @addr: MAC address
 * @aid: AID we assigned to the station if we're an AP
758
 * @supp_rates: Bitmap of supported rates (per band)
Johannes Berg's avatar
Johannes Berg committed
759
 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities
760 761 762 763
 * @drv_priv: data area for driver use, will always be aligned to
 *	sizeof(void *), size is determined in hw information.
 */
struct ieee80211_sta {
764
	u32 supp_rates[IEEE80211_NUM_BANDS];
765 766
	u8 addr[ETH_ALEN];
	u16 aid;
767
	struct ieee80211_sta_ht_cap ht_cap;
768 769 770 771 772

	/* must be last */
	u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
};

773 774 775 776
/**
 * enum sta_notify_cmd - sta notify command
 *
 * Used with the sta_notify() callback in &struct ieee80211_ops, this
777 778
 * indicates addition and removal of a station to station table,
 * or if a associated station made a power state transition.
779 780 781
 *
 * @STA_NOTIFY_ADD: a station was added to the station table
 * @STA_NOTIFY_REMOVE: a station being removed from the station table
782 783 784
 * @STA_NOTIFY_SLEEP: a station is now sleeping
 * @STA_NOTIFY_AWAKE: a sleeping station woke up
 */
785 786
enum sta_notify_cmd {
	STA_NOTIFY_ADD, STA_NOTIFY_REMOVE,
787 788 789
	STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE,
};

790 791 792 793 794 795 796 797 798 799 800 801 802 803 804
/**
 * enum ieee80211_tkip_key_type - get tkip key
 *
 * Used by drivers which need to get a tkip key for skb. Some drivers need a
 * phase 1 key, others need a phase 2 key. A single function allows the driver
 * to get the key, this enum indicates what type of key is required.
 *
 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key
 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key
 */
enum ieee80211_tkip_key_type {
	IEEE80211_TKIP_P1_KEY,
	IEEE80211_TKIP_P2_KEY,
};

805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823
/**
 * enum ieee80211_hw_flags - hardware flags
 *
 * These flags are used to indicate hardware capabilities to
 * the stack. Generally, flags here should have their meaning
 * done in a way that the simplest hardware doesn't need setting
 * any particular flags. There are some exceptions to this rule,
 * however, so you are advised to review these flags carefully.
 *
 * @IEEE80211_HW_RX_INCLUDES_FCS:
 *	Indicates that received frames passed to the stack include
 *	the FCS at the end.
 *
 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
 *	Some wireless LAN chipsets buffer broadcast/multicast frames
 *	for power saving stations in the hardware/firmware and others
 *	rely on the host system for such buffering. This option is used
 *	to configure the IEEE 802.11 upper layer to buffer broadcast and
 *	multicast frames when there are power saving stations so that
824
 *	the driver can fetch them with ieee80211_get_buffered_bc().
825
 *
826 827 828 829 830 831
 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE:
 *	Hardware is not capable of short slot operation on the 2.4 GHz band.
 *
 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE:
 *	Hardware is not capable of receiving frames with short preamble on
 *	the 2.4 GHz band.
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
 *
 * @IEEE80211_HW_SIGNAL_UNSPEC:
 *	Hardware can provide signal values but we don't know its units. We
 *	expect values between 0 and @max_signal.
 *	If possible please provide dB or dBm instead.
 *
 * @IEEE80211_HW_SIGNAL_DB:
 *	Hardware gives signal values in dB, decibel difference from an
 *	arbitrary, fixed reference. We expect values between 0 and @max_signal.
 *	If possible please provide dBm instead.
 *
 * @IEEE80211_HW_SIGNAL_DBM:
 *	Hardware gives signal values in dBm, decibel difference from
 *	one milliwatt. This is the preferred method since it is standardized
 *	between different devices. @max_signal does not need to be set.
 *
 * @IEEE80211_HW_NOISE_DBM:
 *	Hardware can provide noise (radio interference) values in units dBm,
 *      decibel difference from one milliwatt.
851 852 853 854
 *
 * @IEEE80211_HW_SPECTRUM_MGMT:
 * 	Hardware supports spectrum management defined in 802.11h
 * 	Measurement, Channel Switch, Quieting, TPC
Sujith's avatar
Sujith committed
855 856 857
 *
 * @IEEE80211_HW_AMPDU_AGGREGATION:
 *	Hardware supports 11n A-MPDU aggregation.
858
 *
859 860 861 862 863 864 865 866 867
 * @IEEE80211_HW_SUPPORTS_PS:
 *	Hardware has power save support (i.e. can go to sleep).
 *
 * @IEEE80211_HW_PS_NULLFUNC_STACK:
 *	Hardware requires nullfunc frame handling in stack, implies
 *	stack support for dynamic PS.
 *
 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS:
 *	Hardware has support for dynamic PS.
868 869 870
 *
 * @IEEE80211_HW_MFP_CAPABLE:
 *	Hardware supports management frame protection (MFP, IEEE 802.11w).
871 872 873 874
 */
enum ieee80211_hw_flags {
	IEEE80211_HW_RX_INCLUDES_FCS			= 1<<1,
	IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING	= 1<<2,
875 876
	IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE		= 1<<3,
	IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE	= 1<<4,
877 878 879 880
	IEEE80211_HW_SIGNAL_UNSPEC			= 1<<5,
	IEEE80211_HW_SIGNAL_DB				= 1<<6,
	IEEE80211_HW_SIGNAL_DBM				= 1<<7,
	IEEE80211_HW_NOISE_DBM				= 1<<8,
881
	IEEE80211_HW_SPECTRUM_MGMT			= 1<<9,
Sujith's avatar
Sujith committed
882
	IEEE80211_HW_AMPDU_AGGREGATION			= 1<<10,
883 884 885
	IEEE80211_HW_SUPPORTS_PS			= 1<<11,
	IEEE80211_HW_PS_NULLFUNC_STACK			= 1<<12,
	IEEE80211_HW_SUPPORTS_DYNAMIC_PS		= 1<<13,
886
	IEEE80211_HW_MFP_CAPABLE			= 1<<14,
887 888
};

889 890
/**
 * struct ieee80211_hw - hardware information and state
891 892 893 894 895 896 897
 *
 * This structure contains the configuration and hardware
 * information for an 802.11 PHY.
 *
 * @wiphy: This points to the &struct wiphy allocated for this
 *	802.11 PHY. You must fill in the @perm_addr and @dev
 *	members of this structure using SET_IEEE80211_DEV()
898 899
 *	and SET_IEEE80211_PERM_ADDR(). Additionally, all supported
 *	bands (with channels, bitrates) are registered here.
900 901 902 903
 *
 * @conf: &struct ieee80211_conf, device configuration, don't use.
 *
 * @workqueue: single threaded workqueue available for driver use,
904 905 906 907 908
 *	allocated by mac80211 on registration and flushed when an
 *	interface is removed.
 *	NOTICE: All work performed on this workqueue should NEVER
 *	acquire the RTNL lock (i.e. Don't use the function
 *	ieee80211_iterate_active_interfaces())
909 910 911 912 913 914 915 916 917 918 919
 *
 * @priv: pointer to private area that was allocated for driver use
 *	along with this structure.
 *
 * @flags: hardware flags, see &enum ieee80211_hw_flags.
 *
 * @extra_tx_headroom: headroom to reserve in each transmit skb
 *	for use by the driver (e.g. for transmit headers.)
 *
 * @channel_change_time: time (in microseconds) it takes to change channels.
 *
920 921
 * @max_signal: Maximum value for signal (rssi) in RX information, used
 *     only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB
922
 *
923 924 925
 * @max_listen_interval: max listen interval in units of beacon interval
 *     that HW supports
 *
926
 * @queues: number of available hardware transmit queues for
Johannes Berg's avatar
Johannes Berg committed
927 928 929 930 931 932 933 934
 *	data packets. WMM/QoS requires at least four, these
 *	queues need to have configurable access parameters.
 *
 * @ampdu_queues: number of available hardware transmit queues
 *	for A-MPDU packets, these have no access parameters
 *	because they're used only for A-MPDU frames. Note that
 *	mac80211 will not currently use any of the regular queues
 *	for aggregation.
935 936 937 938
 *
 * @rate_control_algorithm: rate control algorithm for this hardware.
 *	If unset (NULL), the default algorithm will be used. Must be
 *	set before calling ieee80211_register_hw().
939 940 941
 *
 * @vif_data_size: size (in bytes) of the drv_priv data area
 *	within &struct ieee80211_vif.
942 943
 * @sta_data_size: size (in bytes) of the drv_priv data area
 *	within &struct ieee80211_sta.
944
 *
945 946
 * @max_rates: maximum number of alternate rate retry stages
 * @max_rate_tries: maximum number of tries for each stage
947
 */
948 949
struct ieee80211_hw {
	struct ieee80211_conf conf;
950
	struct wiphy *wiphy;
951
	struct workqueue_struct *workqueue;
952
	const char *rate_control_algorithm;
953
	void *priv;
954
	u32 flags;
955 956
	unsigned int extra_tx_headroom;
	int channel_change_time;
957
	int vif_data_size;
958
	int sta_data_size;
959 960 961
	u16 queues;
	u16 ampdu_queues;
	u16 max_listen_interval;
962
	s8 max_signal;
963 964
	u8 max_rates;
	u8 max_rate_tries;
965 966
};

967 968 969 970 971 972
/**
 * SET_IEEE80211_DEV - set device for 802.11 hardware
 *
 * @hw: the &struct ieee80211_hw to set the device for
 * @dev: the &struct device of this 802.11 device
 */
973 974 975 976 977
static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
{
	set_wiphy_dev(hw->wiphy, dev);
}

978
/**
979
 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware
980 981 982 983
 *
 * @hw: the &struct ieee80211_hw to set the MAC address for
 * @addr: the address to set
 */
984 985 986 987 988
static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
{
	memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
}

989 990 991 992 993 994 995 996 997 998
static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw)
{
	return hw->queues;
}

static inline int ieee80211_num_queues(struct ieee80211_hw *hw)
{
	return hw->queues + hw->ampdu_queues;
}

999 1000
static inline struct ieee80211_rate *
ieee80211_get_tx_rate(const struct ieee80211_hw *hw,
1001
		      const struct ieee80211_tx_info *c)
1002
{
1003
	if (WARN_ON(c->control.rates[0].idx < 0))
1004
		return NULL;
1005
	return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx];
1006 1007 1008 1009
}

static inline struct ieee80211_rate *
ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
1010
			   const struct ieee80211_tx_info *c)
1011
{
1012
	if (c->control.rts_cts_rate_idx < 0)
1013
		return NULL;
1014
	return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx];
1015 1016 1017 1018
}

static inline struct ieee80211_rate *
ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
1019
			     const struct ieee80211_tx_info *c, int idx)
1020
{
1021
	if (c->control.rates[idx + 1].idx < 0)
1022
		return NULL;
1023
	return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx];
1024 1025
}

1026 1027 1028 1029 1030 1031 1032 1033
/**
 * DOC: Hardware crypto acceleration
 *
 * mac80211 is capable of taking advantage of many hardware
 * acceleration designs for encryption and decryption operations.
 *
 * The set_key() callback in the &struct ieee80211_ops for a given
 * device is called to enable hardware acceleration of encryption and
1034 1035 1036
 * decryption. The callback takes a @sta parameter that will be NULL
 * for default keys or keys used for transmission only, or point to
 * the station information for the peer for individual keys.
1037 1038
 * Multiple transmission keys with the same key index may be used when
 * VLANs are configured for an access point.
1039
 *
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059
 * When transmitting, the TX control data will use the @hw_key_idx
 * selected by the driver by modifying the &struct ieee80211_key_conf
 * pointed to by the @key parameter to the set_key() function.
 *
 * The set_key() call for the %SET_KEY command should return 0 if
 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
 * added; if you return 0 then hw_key_idx must be assigned to the
 * hardware key index, you are free to use the full u8 range.
 *
 * When the cmd is %DISABLE_KEY then it must succeed.
 *
 * Note that it is permissible to not decrypt a frame even if a key
 * for it has been uploaded to hardware, the stack will not make any
 * decision based on whether a key has been uploaded or not but rather
 * based on the receive flags.
 *
 * The &struct ieee80211_key_conf structure pointed to by the @key
 * parameter is guaranteed to be valid until another call to set_key()
 * removes it, but it can only be used as a cookie to differentiate
 * keys.
1060 1061 1062 1063 1064 1065 1066 1067
 *
 * In TKIP some HW need to be provided a phase 1 key, for RX decryption
 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key
 * handler.
 * The update_tkip_key() call updates the driver with the new phase 1 key.
 * This happens everytime the iv16 wraps around (every 65536 packets). The
 * set_key() call will happen only once for each key (unless the AP did
 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is
1068
 * provided by update_tkip_key only. The trigger that makes mac80211 call this
1069
 * handler is software decryption with wrap around of iv16.
1070
 */
1071

1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102