xref: /openbmc/linux/net/mac80211/ieee80211_i.h (revision 3d3337de)
1 /*
2  * Copyright 2002-2005, Instant802 Networks, Inc.
3  * Copyright 2005, Devicescape Software, Inc.
4  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
5  * Copyright 2007-2010	Johannes Berg <johannes@sipsolutions.net>
6  * Copyright 2013-2014  Intel Mobile Communications GmbH
7  *
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.
11  */
12 
13 #ifndef IEEE80211_I_H
14 #define IEEE80211_I_H
15 
16 #include <linux/kernel.h>
17 #include <linux/device.h>
18 #include <linux/if_ether.h>
19 #include <linux/interrupt.h>
20 #include <linux/list.h>
21 #include <linux/netdevice.h>
22 #include <linux/skbuff.h>
23 #include <linux/workqueue.h>
24 #include <linux/types.h>
25 #include <linux/spinlock.h>
26 #include <linux/etherdevice.h>
27 #include <linux/leds.h>
28 #include <linux/idr.h>
29 #include <linux/rhashtable.h>
30 #include <net/ieee80211_radiotap.h>
31 #include <net/cfg80211.h>
32 #include <net/mac80211.h>
33 #include "key.h"
34 #include "sta_info.h"
35 #include "debug.h"
36 
37 struct ieee80211_local;
38 
39 /* Maximum number of broadcast/multicast frames to buffer when some of the
40  * associated stations are using power saving. */
41 #define AP_MAX_BC_BUFFER 128
42 
43 /* Maximum number of frames buffered to all STAs, including multicast frames.
44  * Note: increasing this limit increases the potential memory requirement. Each
45  * frame can be up to about 2 kB long. */
46 #define TOTAL_MAX_TX_BUFFER 512
47 
48 /* Required encryption head and tailroom */
49 #define IEEE80211_ENCRYPT_HEADROOM 8
50 #define IEEE80211_ENCRYPT_TAILROOM 18
51 
52 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
53  * reception of at least three fragmented frames. This limit can be increased
54  * by changing this define, at the cost of slower frame reassembly and
55  * increased memory use (about 2 kB of RAM per entry). */
56 #define IEEE80211_FRAGMENT_MAX 4
57 
58 /* power level hasn't been configured (or set to automatic) */
59 #define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
60 
61 /*
62  * Some APs experience problems when working with U-APSD. Decreasing the
63  * probability of that happening by using legacy mode for all ACs but VO isn't
64  * enough.
65  *
66  * Cisco 4410N originally forced us to enable VO by default only because it
67  * treated non-VO ACs as legacy.
68  *
69  * However some APs (notably Netgear R7000) silently reclassify packets to
70  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
71  * clients would never see some frames (e.g. ARP responses) or would fetch them
72  * accidentally after a long time.
73  *
74  * It makes little sense to enable u-APSD queues by default because it needs
75  * userspace applications to be aware of it to actually take advantage of the
76  * possible additional powersavings. Implicitly depending on driver autotrigger
77  * frame support doesn't make much sense.
78  */
79 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
80 
81 #define IEEE80211_DEFAULT_MAX_SP_LEN		\
82 	IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
83 
84 #define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
85 
86 struct ieee80211_fragment_entry {
87 	unsigned long first_frag_time;
88 	unsigned int seq;
89 	unsigned int rx_queue;
90 	unsigned int last_frag;
91 	unsigned int extra_len;
92 	struct sk_buff_head skb_list;
93 	int ccmp; /* Whether fragments were encrypted with CCMP */
94 	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
95 };
96 
97 
98 struct ieee80211_bss {
99 	u32 device_ts_beacon, device_ts_presp;
100 
101 	bool wmm_used;
102 	bool uapsd_supported;
103 
104 #define IEEE80211_MAX_SUPP_RATES 32
105 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
106 	size_t supp_rates_len;
107 	struct ieee80211_rate *beacon_rate;
108 
109 	/*
110 	 * During association, we save an ERP value from a probe response so
111 	 * that we can feed ERP info to the driver when handling the
112 	 * association completes. these fields probably won't be up-to-date
113 	 * otherwise, you probably don't want to use them.
114 	 */
115 	bool has_erp_value;
116 	u8 erp_value;
117 
118 	/* Keep track of the corruption of the last beacon/probe response. */
119 	u8 corrupt_data;
120 
121 	/* Keep track of what bits of information we have valid info for. */
122 	u8 valid_data;
123 };
124 
125 /**
126  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
127  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
128  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
129  *
130  * These are bss flags that are attached to a bss in the
131  * @corrupt_data field of &struct ieee80211_bss.
132  */
133 enum ieee80211_bss_corrupt_data_flags {
134 	IEEE80211_BSS_CORRUPT_BEACON		= BIT(0),
135 	IEEE80211_BSS_CORRUPT_PROBE_RESP	= BIT(1)
136 };
137 
138 /**
139  * enum ieee80211_valid_data_flags - BSS valid data flags
140  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
141  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
142  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
143  *
144  * These are bss flags that are attached to a bss in the
145  * @valid_data field of &struct ieee80211_bss.  They show which parts
146  * of the data structure were received as a result of an un-corrupted
147  * beacon/probe response.
148  */
149 enum ieee80211_bss_valid_data_flags {
150 	IEEE80211_BSS_VALID_WMM			= BIT(1),
151 	IEEE80211_BSS_VALID_RATES		= BIT(2),
152 	IEEE80211_BSS_VALID_ERP			= BIT(3)
153 };
154 
155 typedef unsigned __bitwise__ ieee80211_tx_result;
156 #define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
157 #define TX_DROP		((__force ieee80211_tx_result) 1u)
158 #define TX_QUEUED	((__force ieee80211_tx_result) 2u)
159 
160 #define IEEE80211_TX_UNICAST		BIT(1)
161 #define IEEE80211_TX_PS_BUFFERED	BIT(2)
162 
163 struct ieee80211_tx_data {
164 	struct sk_buff *skb;
165 	struct sk_buff_head skbs;
166 	struct ieee80211_local *local;
167 	struct ieee80211_sub_if_data *sdata;
168 	struct sta_info *sta;
169 	struct ieee80211_key *key;
170 	struct ieee80211_tx_rate rate;
171 
172 	unsigned int flags;
173 };
174 
175 
176 typedef unsigned __bitwise__ ieee80211_rx_result;
177 #define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
178 #define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
179 #define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
180 #define RX_QUEUED		((__force ieee80211_rx_result) 3u)
181 
182 /**
183  * enum ieee80211_packet_rx_flags - packet RX flags
184  * @IEEE80211_RX_RA_MATCH: frame is destined to interface currently processed
185  *	(incl. multicast frames)
186  * @IEEE80211_RX_FRAGMENTED: fragmented frame
187  * @IEEE80211_RX_AMSDU: a-MSDU packet
188  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
189  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
190  *
191  * These are per-frame flags that are attached to a frame in the
192  * @rx_flags field of &struct ieee80211_rx_status.
193  */
194 enum ieee80211_packet_rx_flags {
195 	IEEE80211_RX_RA_MATCH			= BIT(1),
196 	IEEE80211_RX_FRAGMENTED			= BIT(2),
197 	IEEE80211_RX_AMSDU			= BIT(3),
198 	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
199 	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
200 };
201 
202 /**
203  * enum ieee80211_rx_flags - RX data flags
204  *
205  * @IEEE80211_RX_CMNTR: received on cooked monitor already
206  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
207  *	to cfg80211_report_obss_beacon().
208  *
209  * These flags are used across handling multiple interfaces
210  * for a single frame.
211  */
212 enum ieee80211_rx_flags {
213 	IEEE80211_RX_CMNTR		= BIT(0),
214 	IEEE80211_RX_BEACON_REPORTED	= BIT(1),
215 };
216 
217 struct ieee80211_rx_data {
218 	struct sk_buff *skb;
219 	struct ieee80211_local *local;
220 	struct ieee80211_sub_if_data *sdata;
221 	struct sta_info *sta;
222 	struct ieee80211_key *key;
223 
224 	unsigned int flags;
225 
226 	/*
227 	 * Index into sequence numbers array, 0..16
228 	 * since the last (16) is used for non-QoS,
229 	 * will be 16 on non-QoS frames.
230 	 */
231 	int seqno_idx;
232 
233 	/*
234 	 * Index into the security IV/PN arrays, 0..16
235 	 * since the last (16) is used for CCMP-encrypted
236 	 * management frames, will be set to 16 on mgmt
237 	 * frames and 0 on non-QoS frames.
238 	 */
239 	int security_idx;
240 
241 	u32 tkip_iv32;
242 	u16 tkip_iv16;
243 };
244 
245 struct ieee80211_csa_settings {
246 	const u16 *counter_offsets_beacon;
247 	const u16 *counter_offsets_presp;
248 
249 	int n_counter_offsets_beacon;
250 	int n_counter_offsets_presp;
251 
252 	u8 count;
253 };
254 
255 struct beacon_data {
256 	u8 *head, *tail;
257 	int head_len, tail_len;
258 	struct ieee80211_meshconf_ie *meshconf;
259 	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
260 	u8 csa_current_counter;
261 	struct rcu_head rcu_head;
262 };
263 
264 struct probe_resp {
265 	struct rcu_head rcu_head;
266 	int len;
267 	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
268 	u8 data[0];
269 };
270 
271 struct ps_data {
272 	/* yes, this looks ugly, but guarantees that we can later use
273 	 * bitmap_empty :)
274 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
275 	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
276 			__aligned(__alignof__(unsigned long));
277 	struct sk_buff_head bc_buf;
278 	atomic_t num_sta_ps; /* number of stations in PS mode */
279 	int dtim_count;
280 	bool dtim_bc_mc;
281 };
282 
283 struct ieee80211_if_ap {
284 	struct beacon_data __rcu *beacon;
285 	struct probe_resp __rcu *probe_resp;
286 
287 	/* to be used after channel switch. */
288 	struct cfg80211_beacon_data *next_beacon;
289 	struct list_head vlans; /* write-protected with RTNL and local->mtx */
290 
291 	struct ps_data ps;
292 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
293 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
294 			 driver_smps_mode; /* smps mode request */
295 
296 	struct work_struct request_smps_work;
297 };
298 
299 struct ieee80211_if_wds {
300 	struct sta_info *sta;
301 	u8 remote_addr[ETH_ALEN];
302 };
303 
304 struct ieee80211_if_vlan {
305 	struct list_head list; /* write-protected with RTNL and local->mtx */
306 
307 	/* used for all tx if the VLAN is configured to 4-addr mode */
308 	struct sta_info __rcu *sta;
309 };
310 
311 struct mesh_stats {
312 	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
313 	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
314 	__u32 fwded_frames;		/* Mesh total forwarded frames */
315 	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
316 	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
317 	__u32 dropped_frames_congestion;/* Not forwarded due to congestion */
318 };
319 
320 #define PREQ_Q_F_START		0x1
321 #define PREQ_Q_F_REFRESH	0x2
322 struct mesh_preq_queue {
323 	struct list_head list;
324 	u8 dst[ETH_ALEN];
325 	u8 flags;
326 };
327 
328 #if HZ/100 == 0
329 #define IEEE80211_ROC_MIN_LEFT	1
330 #else
331 #define IEEE80211_ROC_MIN_LEFT	(HZ/100)
332 #endif
333 
334 struct ieee80211_roc_work {
335 	struct list_head list;
336 	struct list_head dependents;
337 
338 	struct delayed_work work;
339 
340 	struct ieee80211_sub_if_data *sdata;
341 
342 	struct ieee80211_channel *chan;
343 
344 	bool started, abort, hw_begun, notified;
345 	bool to_be_freed;
346 	bool on_channel;
347 
348 	unsigned long hw_start_time;
349 
350 	u32 duration, req_duration;
351 	struct sk_buff *frame;
352 	u64 cookie, mgmt_tx_cookie;
353 	enum ieee80211_roc_type type;
354 };
355 
356 /* flags used in struct ieee80211_if_managed.flags */
357 enum ieee80211_sta_flags {
358 	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
359 	IEEE80211_STA_CONTROL_PORT	= BIT(2),
360 	IEEE80211_STA_DISABLE_HT	= BIT(4),
361 	IEEE80211_STA_MFP_ENABLED	= BIT(6),
362 	IEEE80211_STA_UAPSD_ENABLED	= BIT(7),
363 	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),
364 	IEEE80211_STA_RESET_SIGNAL_AVE	= BIT(9),
365 	IEEE80211_STA_DISABLE_40MHZ	= BIT(10),
366 	IEEE80211_STA_DISABLE_VHT	= BIT(11),
367 	IEEE80211_STA_DISABLE_80P80MHZ	= BIT(12),
368 	IEEE80211_STA_DISABLE_160MHZ	= BIT(13),
369 	IEEE80211_STA_DISABLE_WMM	= BIT(14),
370 	IEEE80211_STA_ENABLE_RRM	= BIT(15),
371 };
372 
373 struct ieee80211_mgd_auth_data {
374 	struct cfg80211_bss *bss;
375 	unsigned long timeout;
376 	int tries;
377 	u16 algorithm, expected_transaction;
378 
379 	u8 key[WLAN_KEY_LEN_WEP104];
380 	u8 key_len, key_idx;
381 	bool done;
382 	bool timeout_started;
383 
384 	u16 sae_trans, sae_status;
385 	size_t data_len;
386 	u8 data[];
387 };
388 
389 struct ieee80211_mgd_assoc_data {
390 	struct cfg80211_bss *bss;
391 	const u8 *supp_rates;
392 
393 	unsigned long timeout;
394 	int tries;
395 
396 	u16 capability;
397 	u8 prev_bssid[ETH_ALEN];
398 	u8 ssid[IEEE80211_MAX_SSID_LEN];
399 	u8 ssid_len;
400 	u8 supp_rates_len;
401 	bool wmm, uapsd;
402 	bool need_beacon;
403 	bool synced;
404 	bool timeout_started;
405 
406 	u8 ap_ht_param;
407 
408 	struct ieee80211_vht_cap ap_vht_cap;
409 
410 	size_t ie_len;
411 	u8 ie[];
412 };
413 
414 struct ieee80211_sta_tx_tspec {
415 	/* timestamp of the first packet in the time slice */
416 	unsigned long time_slice_start;
417 
418 	u32 admitted_time; /* in usecs, unlike over the air */
419 	u8 tsid;
420 	s8 up; /* signed to be able to invalidate with -1 during teardown */
421 
422 	/* consumed TX time in microseconds in the time slice */
423 	u32 consumed_tx_time;
424 	enum {
425 		TX_TSPEC_ACTION_NONE = 0,
426 		TX_TSPEC_ACTION_DOWNGRADE,
427 		TX_TSPEC_ACTION_STOP_DOWNGRADE,
428 	} action;
429 	bool downgraded;
430 };
431 
432 struct ieee80211_if_managed {
433 	struct timer_list timer;
434 	struct timer_list conn_mon_timer;
435 	struct timer_list bcn_mon_timer;
436 	struct timer_list chswitch_timer;
437 	struct work_struct monitor_work;
438 	struct work_struct chswitch_work;
439 	struct work_struct beacon_connection_loss_work;
440 	struct work_struct csa_connection_drop_work;
441 
442 	unsigned long beacon_timeout;
443 	unsigned long probe_timeout;
444 	int probe_send_count;
445 	bool nullfunc_failed;
446 	bool connection_loss;
447 
448 	struct cfg80211_bss *associated;
449 	struct ieee80211_mgd_auth_data *auth_data;
450 	struct ieee80211_mgd_assoc_data *assoc_data;
451 
452 	u8 bssid[ETH_ALEN];
453 
454 	u16 aid;
455 
456 	bool powersave; /* powersave requested for this iface */
457 	bool broken_ap; /* AP is broken -- turn off powersave */
458 	bool have_beacon;
459 	u8 dtim_period;
460 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
461 				 driver_smps_mode; /* smps mode request */
462 
463 	struct work_struct request_smps_work;
464 
465 	unsigned int flags;
466 
467 	bool csa_waiting_bcn;
468 	bool csa_ignored_same_chan;
469 
470 	bool beacon_crc_valid;
471 	u32 beacon_crc;
472 
473 	bool status_acked;
474 	bool status_received;
475 	__le16 status_fc;
476 
477 	enum {
478 		IEEE80211_MFP_DISABLED,
479 		IEEE80211_MFP_OPTIONAL,
480 		IEEE80211_MFP_REQUIRED
481 	} mfp; /* management frame protection */
482 
483 	/*
484 	 * Bitmask of enabled u-apsd queues,
485 	 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
486 	 * to take effect.
487 	 */
488 	unsigned int uapsd_queues;
489 
490 	/*
491 	 * Maximum number of buffered frames AP can deliver during a
492 	 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
493 	 * Needs a new association to take effect.
494 	 */
495 	unsigned int uapsd_max_sp_len;
496 
497 	int wmm_last_param_set;
498 
499 	u8 use_4addr;
500 
501 	s16 p2p_noa_index;
502 
503 	/* Signal strength from the last Beacon frame in the current BSS. */
504 	int last_beacon_signal;
505 
506 	/*
507 	 * Weighted average of the signal strength from Beacon frames in the
508 	 * current BSS. This is in units of 1/16 of the signal unit to maintain
509 	 * accuracy and to speed up calculations, i.e., the value need to be
510 	 * divided by 16 to get the actual value.
511 	 */
512 	int ave_beacon_signal;
513 
514 	/*
515 	 * Number of Beacon frames used in ave_beacon_signal. This can be used
516 	 * to avoid generating less reliable cqm events that would be based
517 	 * only on couple of received frames.
518 	 */
519 	unsigned int count_beacon_signal;
520 
521 	/*
522 	 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
523 	 * that triggered a cqm event. 0 indicates that no event has been
524 	 * generated for the current association.
525 	 */
526 	int last_cqm_event_signal;
527 
528 	/*
529 	 * State variables for keeping track of RSSI of the AP currently
530 	 * connected to and informing driver when RSSI has gone
531 	 * below/above a certain threshold.
532 	 */
533 	int rssi_min_thold, rssi_max_thold;
534 	int last_ave_beacon_signal;
535 
536 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
537 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
538 	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
539 	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
540 
541 	/* TDLS support */
542 	u8 tdls_peer[ETH_ALEN] __aligned(2);
543 	struct delayed_work tdls_peer_del_work;
544 	struct sk_buff *orig_teardown_skb; /* The original teardown skb */
545 	struct sk_buff *teardown_skb; /* A copy to send through the AP */
546 	spinlock_t teardown_lock; /* To lock changing teardown_skb */
547 	bool tdls_chan_switch_prohibited;
548 
549 	/* WMM-AC TSPEC support */
550 	struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
551 	/* Use a separate work struct so that we can do something here
552 	 * while the sdata->work is flushing the queues, for example.
553 	 * otherwise, in scenarios where we hardly get any traffic out
554 	 * on the BE queue, but there's a lot of VO traffic, we might
555 	 * get stuck in a downgraded situation and flush takes forever.
556 	 */
557 	struct delayed_work tx_tspec_wk;
558 };
559 
560 struct ieee80211_if_ibss {
561 	struct timer_list timer;
562 	struct work_struct csa_connection_drop_work;
563 
564 	unsigned long last_scan_completed;
565 
566 	u32 basic_rates;
567 
568 	bool fixed_bssid;
569 	bool fixed_channel;
570 	bool privacy;
571 
572 	bool control_port;
573 	bool userspace_handles_dfs;
574 
575 	u8 bssid[ETH_ALEN] __aligned(2);
576 	u8 ssid[IEEE80211_MAX_SSID_LEN];
577 	u8 ssid_len, ie_len;
578 	u8 *ie;
579 	struct cfg80211_chan_def chandef;
580 
581 	unsigned long ibss_join_req;
582 	/* probe response/beacon for IBSS */
583 	struct beacon_data __rcu *presp;
584 
585 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
586 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
587 
588 	spinlock_t incomplete_lock;
589 	struct list_head incomplete_stations;
590 
591 	enum {
592 		IEEE80211_IBSS_MLME_SEARCH,
593 		IEEE80211_IBSS_MLME_JOINED,
594 	} state;
595 };
596 
597 /**
598  * struct ieee80211_if_ocb - OCB mode state
599  *
600  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
601  * @wrkq_flags: OCB deferred task action
602  * @incomplete_lock: delayed STA insertion lock
603  * @incomplete_stations: list of STAs waiting for delayed insertion
604  * @joined: indication if the interface is connected to an OCB network
605  */
606 struct ieee80211_if_ocb {
607 	struct timer_list housekeeping_timer;
608 	unsigned long wrkq_flags;
609 
610 	spinlock_t incomplete_lock;
611 	struct list_head incomplete_stations;
612 
613 	bool joined;
614 };
615 
616 /**
617  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
618  *
619  * these declarations define the interface, which enables
620  * vendor-specific mesh synchronization
621  *
622  */
623 struct ieee802_11_elems;
624 struct ieee80211_mesh_sync_ops {
625 	void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
626 			     u16 stype,
627 			     struct ieee80211_mgmt *mgmt,
628 			     struct ieee802_11_elems *elems,
629 			     struct ieee80211_rx_status *rx_status);
630 
631 	/* should be called with beacon_data under RCU read lock */
632 	void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
633 			    struct beacon_data *beacon);
634 	/* add other framework functions here */
635 };
636 
637 struct mesh_csa_settings {
638 	struct rcu_head rcu_head;
639 	struct cfg80211_csa_settings settings;
640 };
641 
642 struct ieee80211_if_mesh {
643 	struct timer_list housekeeping_timer;
644 	struct timer_list mesh_path_timer;
645 	struct timer_list mesh_path_root_timer;
646 
647 	unsigned long wrkq_flags;
648 	unsigned long mbss_changed;
649 
650 	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
651 	size_t mesh_id_len;
652 	/* Active Path Selection Protocol Identifier */
653 	u8 mesh_pp_id;
654 	/* Active Path Selection Metric Identifier */
655 	u8 mesh_pm_id;
656 	/* Congestion Control Mode Identifier */
657 	u8 mesh_cc_id;
658 	/* Synchronization Protocol Identifier */
659 	u8 mesh_sp_id;
660 	/* Authentication Protocol Identifier */
661 	u8 mesh_auth_id;
662 	/* Local mesh Sequence Number */
663 	u32 sn;
664 	/* Last used PREQ ID */
665 	u32 preq_id;
666 	atomic_t mpaths;
667 	/* Timestamp of last SN update */
668 	unsigned long last_sn_update;
669 	/* Time when it's ok to send next PERR */
670 	unsigned long next_perr;
671 	/* Timestamp of last PREQ sent */
672 	unsigned long last_preq;
673 	struct mesh_rmc *rmc;
674 	spinlock_t mesh_preq_queue_lock;
675 	struct mesh_preq_queue preq_queue;
676 	int preq_queue_len;
677 	struct mesh_stats mshstats;
678 	struct mesh_config mshcfg;
679 	atomic_t estab_plinks;
680 	u32 mesh_seqnum;
681 	bool accepting_plinks;
682 	int num_gates;
683 	struct beacon_data __rcu *beacon;
684 	const u8 *ie;
685 	u8 ie_len;
686 	enum {
687 		IEEE80211_MESH_SEC_NONE = 0x0,
688 		IEEE80211_MESH_SEC_AUTHED = 0x1,
689 		IEEE80211_MESH_SEC_SECURED = 0x2,
690 	} security;
691 	bool user_mpm;
692 	/* Extensible Synchronization Framework */
693 	const struct ieee80211_mesh_sync_ops *sync_ops;
694 	s64 sync_offset_clockdrift_max;
695 	spinlock_t sync_offset_lock;
696 	bool adjusting_tbtt;
697 	/* mesh power save */
698 	enum nl80211_mesh_power_mode nonpeer_pm;
699 	int ps_peers_light_sleep;
700 	int ps_peers_deep_sleep;
701 	struct ps_data ps;
702 	/* Channel Switching Support */
703 	struct mesh_csa_settings __rcu *csa;
704 	enum {
705 		IEEE80211_MESH_CSA_ROLE_NONE,
706 		IEEE80211_MESH_CSA_ROLE_INIT,
707 		IEEE80211_MESH_CSA_ROLE_REPEATER,
708 	} csa_role;
709 	u8 chsw_ttl;
710 	u16 pre_value;
711 
712 	/* offset from skb->data while building IE */
713 	int meshconf_offset;
714 };
715 
716 #ifdef CONFIG_MAC80211_MESH
717 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
718 	do { (msh)->mshstats.name++; } while (0)
719 #else
720 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
721 	do { } while (0)
722 #endif
723 
724 /**
725  * enum ieee80211_sub_if_data_flags - virtual interface flags
726  *
727  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
728  * @IEEE80211_SDATA_PROMISC: interface is promisc
729  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
730  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
731  *	associated stations and deliver multicast frames both
732  *	back to wireless media and to the local net stack.
733  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
734  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
735  */
736 enum ieee80211_sub_if_data_flags {
737 	IEEE80211_SDATA_ALLMULTI		= BIT(0),
738 	IEEE80211_SDATA_PROMISC			= BIT(1),
739 	IEEE80211_SDATA_OPERATING_GMODE		= BIT(2),
740 	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
741 	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
742 	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
743 };
744 
745 /**
746  * enum ieee80211_sdata_state_bits - virtual interface state bits
747  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
748  *	mirrors netif_running() but is separate for interface type
749  *	change handling while the interface is up
750  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
751  *	mode, so queues are stopped
752  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
753  *	to offchannel, reset when offchannel returns
754  */
755 enum ieee80211_sdata_state_bits {
756 	SDATA_STATE_RUNNING,
757 	SDATA_STATE_OFFCHANNEL,
758 	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
759 };
760 
761 /**
762  * enum ieee80211_chanctx_mode - channel context configuration mode
763  *
764  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
765  *	multiple interfaces
766  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
767  *	only by a single interface. This can be used for example for
768  *	non-fixed channel IBSS.
769  */
770 enum ieee80211_chanctx_mode {
771 	IEEE80211_CHANCTX_SHARED,
772 	IEEE80211_CHANCTX_EXCLUSIVE
773 };
774 
775 /**
776  * enum ieee80211_chanctx_replace_state - channel context replacement state
777  *
778  * This is used for channel context in-place reservations that require channel
779  * context switch/swap.
780  *
781  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
782  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
783  *	by a (not yet registered) channel context pointed by %replace_ctx.
784  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
785  *	replaces an existing channel context pointed to by %replace_ctx.
786  */
787 enum ieee80211_chanctx_replace_state {
788 	IEEE80211_CHANCTX_REPLACE_NONE,
789 	IEEE80211_CHANCTX_WILL_BE_REPLACED,
790 	IEEE80211_CHANCTX_REPLACES_OTHER,
791 };
792 
793 struct ieee80211_chanctx {
794 	struct list_head list;
795 	struct rcu_head rcu_head;
796 
797 	struct list_head assigned_vifs;
798 	struct list_head reserved_vifs;
799 
800 	enum ieee80211_chanctx_replace_state replace_state;
801 	struct ieee80211_chanctx *replace_ctx;
802 
803 	enum ieee80211_chanctx_mode mode;
804 	bool driver_present;
805 
806 	struct ieee80211_chanctx_conf conf;
807 };
808 
809 struct mac80211_qos_map {
810 	struct cfg80211_qos_map qos_map;
811 	struct rcu_head rcu_head;
812 };
813 
814 enum txq_info_flags {
815 	IEEE80211_TXQ_STOP,
816 	IEEE80211_TXQ_AMPDU,
817 };
818 
819 struct txq_info {
820 	struct sk_buff_head queue;
821 	unsigned long flags;
822 
823 	/* keep last! */
824 	struct ieee80211_txq txq;
825 };
826 
827 struct ieee80211_sub_if_data {
828 	struct list_head list;
829 
830 	struct wireless_dev wdev;
831 
832 	/* keys */
833 	struct list_head key_list;
834 
835 	/* count for keys needing tailroom space allocation */
836 	int crypto_tx_tailroom_needed_cnt;
837 	int crypto_tx_tailroom_pending_dec;
838 	struct delayed_work dec_tailroom_needed_wk;
839 
840 	struct net_device *dev;
841 	struct ieee80211_local *local;
842 
843 	unsigned int flags;
844 
845 	unsigned long state;
846 
847 	char name[IFNAMSIZ];
848 
849 	/* Fragment table for host-based reassembly */
850 	struct ieee80211_fragment_entry	fragments[IEEE80211_FRAGMENT_MAX];
851 	unsigned int fragment_next;
852 
853 	/* TID bitmap for NoAck policy */
854 	u16 noack_map;
855 
856 	/* bit field of ACM bits (BIT(802.1D tag)) */
857 	u8 wmm_acm;
858 
859 	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
860 	struct ieee80211_key __rcu *default_unicast_key;
861 	struct ieee80211_key __rcu *default_multicast_key;
862 	struct ieee80211_key __rcu *default_mgmt_key;
863 
864 	u16 sequence_number;
865 	__be16 control_port_protocol;
866 	bool control_port_no_encrypt;
867 	int encrypt_headroom;
868 
869 	atomic_t txqs_len[IEEE80211_NUM_ACS];
870 	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
871 	struct mac80211_qos_map __rcu *qos_map;
872 
873 	struct work_struct csa_finalize_work;
874 	bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
875 	struct cfg80211_chan_def csa_chandef;
876 
877 	struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
878 	struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
879 
880 	/* context reservation -- protected with chanctx_mtx */
881 	struct ieee80211_chanctx *reserved_chanctx;
882 	struct cfg80211_chan_def reserved_chandef;
883 	bool reserved_radar_required;
884 	bool reserved_ready;
885 
886 	/* used to reconfigure hardware SM PS */
887 	struct work_struct recalc_smps;
888 
889 	struct work_struct work;
890 	struct sk_buff_head skb_queue;
891 
892 	u8 needed_rx_chains;
893 	enum ieee80211_smps_mode smps_mode;
894 
895 	int user_power_level; /* in dBm */
896 	int ap_power_level; /* in dBm */
897 
898 	bool radar_required;
899 	struct delayed_work dfs_cac_timer_work;
900 
901 	/*
902 	 * AP this belongs to: self in AP mode and
903 	 * corresponding AP in VLAN mode, NULL for
904 	 * all others (might be needed later in IBSS)
905 	 */
906 	struct ieee80211_if_ap *bss;
907 
908 	/* bitmap of allowed (non-MCS) rate indexes for rate control */
909 	u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
910 
911 	bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
912 	u8  rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
913 
914 	union {
915 		struct ieee80211_if_ap ap;
916 		struct ieee80211_if_wds wds;
917 		struct ieee80211_if_vlan vlan;
918 		struct ieee80211_if_managed mgd;
919 		struct ieee80211_if_ibss ibss;
920 		struct ieee80211_if_mesh mesh;
921 		struct ieee80211_if_ocb ocb;
922 		u32 mntr_flags;
923 	} u;
924 
925 #ifdef CONFIG_MAC80211_DEBUGFS
926 	struct {
927 		struct dentry *subdir_stations;
928 		struct dentry *default_unicast_key;
929 		struct dentry *default_multicast_key;
930 		struct dentry *default_mgmt_key;
931 	} debugfs;
932 #endif
933 
934 	/* must be last, dynamically sized area in this! */
935 	struct ieee80211_vif vif;
936 };
937 
938 static inline
939 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
940 {
941 	return container_of(p, struct ieee80211_sub_if_data, vif);
942 }
943 
944 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
945 	__acquires(&sdata->wdev.mtx)
946 {
947 	mutex_lock(&sdata->wdev.mtx);
948 	__acquire(&sdata->wdev.mtx);
949 }
950 
951 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
952 	__releases(&sdata->wdev.mtx)
953 {
954 	mutex_unlock(&sdata->wdev.mtx);
955 	__release(&sdata->wdev.mtx);
956 }
957 
958 #define sdata_dereference(p, sdata) \
959 	rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
960 
961 static inline void
962 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
963 {
964 	lockdep_assert_held(&sdata->wdev.mtx);
965 }
966 
967 static inline enum ieee80211_band
968 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
969 {
970 	enum ieee80211_band band = IEEE80211_BAND_2GHZ;
971 	struct ieee80211_chanctx_conf *chanctx_conf;
972 
973 	rcu_read_lock();
974 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
975 	if (!WARN_ON(!chanctx_conf))
976 		band = chanctx_conf->def.chan->band;
977 	rcu_read_unlock();
978 
979 	return band;
980 }
981 
982 static inline int
983 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
984 {
985 	switch (chandef->width) {
986 	case NL80211_CHAN_WIDTH_5:
987 		return 2;
988 	case NL80211_CHAN_WIDTH_10:
989 		return 1;
990 	default:
991 		return 0;
992 	}
993 }
994 
995 static inline int
996 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
997 {
998 	struct ieee80211_chanctx_conf *chanctx_conf;
999 	int shift = 0;
1000 
1001 	rcu_read_lock();
1002 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
1003 	if (chanctx_conf)
1004 		shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1005 	rcu_read_unlock();
1006 
1007 	return shift;
1008 }
1009 
1010 struct ieee80211_rx_agg {
1011 	u8 addr[ETH_ALEN];
1012 	u16 tid;
1013 };
1014 
1015 enum sdata_queue_type {
1016 	IEEE80211_SDATA_QUEUE_TYPE_FRAME	= 0,
1017 	IEEE80211_SDATA_QUEUE_AGG_START		= 1,
1018 	IEEE80211_SDATA_QUEUE_AGG_STOP		= 2,
1019 	IEEE80211_SDATA_QUEUE_RX_AGG_START	= 3,
1020 	IEEE80211_SDATA_QUEUE_RX_AGG_STOP	= 4,
1021 	IEEE80211_SDATA_QUEUE_TDLS_CHSW		= 5,
1022 };
1023 
1024 enum {
1025 	IEEE80211_RX_MSG	= 1,
1026 	IEEE80211_TX_STATUS_MSG	= 2,
1027 };
1028 
1029 enum queue_stop_reason {
1030 	IEEE80211_QUEUE_STOP_REASON_DRIVER,
1031 	IEEE80211_QUEUE_STOP_REASON_PS,
1032 	IEEE80211_QUEUE_STOP_REASON_CSA,
1033 	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1034 	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1035 	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1036 	IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1037 	IEEE80211_QUEUE_STOP_REASON_FLUSH,
1038 	IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1039 	IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1040 
1041 	IEEE80211_QUEUE_STOP_REASONS,
1042 };
1043 
1044 #ifdef CONFIG_MAC80211_LEDS
1045 struct tpt_led_trigger {
1046 	struct led_trigger trig;
1047 	char name[32];
1048 	const struct ieee80211_tpt_blink *blink_table;
1049 	unsigned int blink_table_len;
1050 	struct timer_list timer;
1051 	unsigned long prev_traffic;
1052 	unsigned long tx_bytes, rx_bytes;
1053 	unsigned int active, want;
1054 	bool running;
1055 };
1056 #endif
1057 
1058 /**
1059  * mac80211 scan flags - currently active scan mode
1060  *
1061  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1062  *	well be on the operating channel
1063  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1064  *	determine if we are on the operating channel or not
1065  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1066  *	channel. This should not interrupt normal traffic.
1067  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1068  *	that the scan completed.
1069  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1070  *	a scan complete for an aborted scan.
1071  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1072  *	cancelled.
1073  */
1074 enum {
1075 	SCAN_SW_SCANNING,
1076 	SCAN_HW_SCANNING,
1077 	SCAN_ONCHANNEL_SCANNING,
1078 	SCAN_COMPLETED,
1079 	SCAN_ABORTED,
1080 	SCAN_HW_CANCELLED,
1081 };
1082 
1083 /**
1084  * enum mac80211_scan_state - scan state machine states
1085  *
1086  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1087  *	determines if we should keep on scanning or switch back to the
1088  *	operating channel
1089  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1090  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1091  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1092  *	send out data
1093  * @SCAN_RESUME: Resume the scan and scan the next channel
1094  * @SCAN_ABORT: Abort the scan and go back to operating channel
1095  */
1096 enum mac80211_scan_state {
1097 	SCAN_DECISION,
1098 	SCAN_SET_CHANNEL,
1099 	SCAN_SEND_PROBE,
1100 	SCAN_SUSPEND,
1101 	SCAN_RESUME,
1102 	SCAN_ABORT,
1103 };
1104 
1105 struct ieee80211_local {
1106 	/* embed the driver visible part.
1107 	 * don't cast (use the static inlines below), but we keep
1108 	 * it first anyway so they become a no-op */
1109 	struct ieee80211_hw hw;
1110 
1111 	const struct ieee80211_ops *ops;
1112 
1113 	/*
1114 	 * private workqueue to mac80211. mac80211 makes this accessible
1115 	 * via ieee80211_queue_work()
1116 	 */
1117 	struct workqueue_struct *workqueue;
1118 
1119 	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1120 	int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1121 	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1122 	spinlock_t queue_stop_reason_lock;
1123 
1124 	int open_count;
1125 	int monitors, cooked_mntrs;
1126 	/* number of interfaces with corresponding FIF_ flags */
1127 	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1128 	    fif_probe_req;
1129 	int probe_req_reg;
1130 	unsigned int filter_flags; /* FIF_* */
1131 
1132 	bool wiphy_ciphers_allocated;
1133 
1134 	bool use_chanctx;
1135 
1136 	/* protects the aggregated multicast list and filter calls */
1137 	spinlock_t filter_lock;
1138 
1139 	/* used for uploading changed mc list */
1140 	struct work_struct reconfig_filter;
1141 
1142 	/* aggregated multicast list */
1143 	struct netdev_hw_addr_list mc_list;
1144 
1145 	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1146 
1147 	/*
1148 	 * suspended is true if we finished all the suspend _and_ we have
1149 	 * not yet come up from resume. This is to be used by mac80211
1150 	 * to ensure driver sanity during suspend and mac80211's own
1151 	 * sanity. It can eventually be used for WoW as well.
1152 	 */
1153 	bool suspended;
1154 
1155 	/*
1156 	 * Resuming is true while suspended, but when we're reprogramming the
1157 	 * hardware -- at that time it's allowed to use ieee80211_queue_work()
1158 	 * again even though some other parts of the stack are still suspended
1159 	 * and we still drop received frames to avoid waking the stack.
1160 	 */
1161 	bool resuming;
1162 
1163 	/*
1164 	 * quiescing is true during the suspend process _only_ to
1165 	 * ease timer cancelling etc.
1166 	 */
1167 	bool quiescing;
1168 
1169 	/* device is started */
1170 	bool started;
1171 
1172 	/* device is during a HW reconfig */
1173 	bool in_reconfig;
1174 
1175 	/* wowlan is enabled -- don't reconfig on resume */
1176 	bool wowlan;
1177 
1178 	struct work_struct radar_detected_work;
1179 
1180 	/* number of RX chains the hardware has */
1181 	u8 rx_chains;
1182 
1183 	int tx_headroom; /* required headroom for hardware/radiotap */
1184 
1185 	/* Tasklet and skb queue to process calls from IRQ mode. All frames
1186 	 * added to skb_queue will be processed, but frames in
1187 	 * skb_queue_unreliable may be dropped if the total length of these
1188 	 * queues increases over the limit. */
1189 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1190 	struct tasklet_struct tasklet;
1191 	struct sk_buff_head skb_queue;
1192 	struct sk_buff_head skb_queue_unreliable;
1193 
1194 	spinlock_t rx_path_lock;
1195 
1196 	/* Station data */
1197 	/*
1198 	 * The mutex only protects the list, hash table and
1199 	 * counter, reads are done with RCU.
1200 	 */
1201 	struct mutex sta_mtx;
1202 	spinlock_t tim_lock;
1203 	unsigned long num_sta;
1204 	struct list_head sta_list;
1205 	struct rhashtable sta_hash;
1206 	struct timer_list sta_cleanup;
1207 	int sta_generation;
1208 
1209 	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1210 	struct tasklet_struct tx_pending_tasklet;
1211 
1212 	atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1213 
1214 	/* number of interfaces with corresponding IFF_ flags */
1215 	atomic_t iff_allmultis, iff_promiscs;
1216 
1217 	struct rate_control_ref *rate_ctrl;
1218 
1219 	struct crypto_cipher *wep_tx_tfm;
1220 	struct crypto_cipher *wep_rx_tfm;
1221 	u32 wep_iv;
1222 
1223 	/* see iface.c */
1224 	struct list_head interfaces;
1225 	struct mutex iflist_mtx;
1226 
1227 	/*
1228 	 * Key mutex, protects sdata's key_list and sta_info's
1229 	 * key pointers (write access, they're RCU.)
1230 	 */
1231 	struct mutex key_mtx;
1232 
1233 	/* mutex for scan and work locking */
1234 	struct mutex mtx;
1235 
1236 	/* Scanning and BSS list */
1237 	unsigned long scanning;
1238 	struct cfg80211_ssid scan_ssid;
1239 	struct cfg80211_scan_request *int_scan_req;
1240 	struct cfg80211_scan_request __rcu *scan_req;
1241 	struct ieee80211_scan_request *hw_scan_req;
1242 	struct cfg80211_chan_def scan_chandef;
1243 	enum ieee80211_band hw_scan_band;
1244 	int scan_channel_idx;
1245 	int scan_ies_len;
1246 	int hw_scan_ies_bufsize;
1247 
1248 	struct work_struct sched_scan_stopped_work;
1249 	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1250 	struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1251 	u8 scan_addr[ETH_ALEN];
1252 
1253 	unsigned long leave_oper_channel_time;
1254 	enum mac80211_scan_state next_scan_state;
1255 	struct delayed_work scan_work;
1256 	struct ieee80211_sub_if_data __rcu *scan_sdata;
1257 	/* For backward compatibility only -- do not use */
1258 	struct cfg80211_chan_def _oper_chandef;
1259 
1260 	/* Temporary remain-on-channel for off-channel operations */
1261 	struct ieee80211_channel *tmp_channel;
1262 
1263 	/* channel contexts */
1264 	struct list_head chanctx_list;
1265 	struct mutex chanctx_mtx;
1266 
1267 	/* SNMP counters */
1268 	/* dot11CountersTable */
1269 	u32 dot11TransmittedFragmentCount;
1270 	u32 dot11MulticastTransmittedFrameCount;
1271 	u32 dot11FailedCount;
1272 	u32 dot11RetryCount;
1273 	u32 dot11MultipleRetryCount;
1274 	u32 dot11FrameDuplicateCount;
1275 	u32 dot11ReceivedFragmentCount;
1276 	u32 dot11MulticastReceivedFrameCount;
1277 	u32 dot11TransmittedFrameCount;
1278 
1279 #ifdef CONFIG_MAC80211_LEDS
1280 	struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
1281 	struct tpt_led_trigger *tpt_led_trigger;
1282 	char tx_led_name[32], rx_led_name[32],
1283 	     assoc_led_name[32], radio_led_name[32];
1284 #endif
1285 
1286 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1287 	/* TX/RX handler statistics */
1288 	unsigned int tx_handlers_drop;
1289 	unsigned int tx_handlers_queued;
1290 	unsigned int tx_handlers_drop_fragment;
1291 	unsigned int tx_handlers_drop_wep;
1292 	unsigned int tx_handlers_drop_not_assoc;
1293 	unsigned int tx_handlers_drop_unauth_port;
1294 	unsigned int rx_handlers_drop;
1295 	unsigned int rx_handlers_queued;
1296 	unsigned int rx_handlers_drop_nullfunc;
1297 	unsigned int rx_handlers_drop_defrag;
1298 	unsigned int rx_handlers_drop_short;
1299 	unsigned int tx_expand_skb_head;
1300 	unsigned int tx_expand_skb_head_cloned;
1301 	unsigned int rx_expand_skb_head;
1302 	unsigned int rx_expand_skb_head2;
1303 	unsigned int rx_handlers_fragments;
1304 	unsigned int tx_status_drop;
1305 #define I802_DEBUG_INC(c) (c)++
1306 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1307 #define I802_DEBUG_INC(c) do { } while (0)
1308 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1309 
1310 
1311 	int total_ps_buffered; /* total number of all buffered unicast and
1312 				* multicast packets for power saving stations
1313 				*/
1314 
1315 	bool pspolling;
1316 	bool offchannel_ps_enabled;
1317 	/*
1318 	 * PS can only be enabled when we have exactly one managed
1319 	 * interface (and monitors) in PS, this then points there.
1320 	 */
1321 	struct ieee80211_sub_if_data *ps_sdata;
1322 	struct work_struct dynamic_ps_enable_work;
1323 	struct work_struct dynamic_ps_disable_work;
1324 	struct timer_list dynamic_ps_timer;
1325 	struct notifier_block network_latency_notifier;
1326 	struct notifier_block ifa_notifier;
1327 	struct notifier_block ifa6_notifier;
1328 
1329 	/*
1330 	 * The dynamic ps timeout configured from user space via WEXT -
1331 	 * this will override whatever chosen by mac80211 internally.
1332 	 */
1333 	int dynamic_ps_forced_timeout;
1334 
1335 	int user_power_level; /* in dBm, for all interfaces */
1336 
1337 	enum ieee80211_smps_mode smps_mode;
1338 
1339 	struct work_struct restart_work;
1340 
1341 #ifdef CONFIG_MAC80211_DEBUGFS
1342 	struct local_debugfsdentries {
1343 		struct dentry *rcdir;
1344 		struct dentry *keys;
1345 	} debugfs;
1346 #endif
1347 
1348 	/*
1349 	 * Remain-on-channel support
1350 	 */
1351 	struct list_head roc_list;
1352 	struct work_struct hw_roc_start, hw_roc_done;
1353 	unsigned long hw_roc_start_time;
1354 	u64 roc_cookie_counter;
1355 
1356 	struct idr ack_status_frames;
1357 	spinlock_t ack_status_lock;
1358 
1359 	struct ieee80211_sub_if_data __rcu *p2p_sdata;
1360 
1361 	struct napi_struct *napi;
1362 
1363 	/* virtual monitor interface */
1364 	struct ieee80211_sub_if_data __rcu *monitor_sdata;
1365 	struct cfg80211_chan_def monitor_chandef;
1366 
1367 	/* extended capabilities provided by mac80211 */
1368 	u8 ext_capa[8];
1369 };
1370 
1371 static inline struct ieee80211_sub_if_data *
1372 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1373 {
1374 	return netdev_priv(dev);
1375 }
1376 
1377 static inline struct ieee80211_sub_if_data *
1378 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1379 {
1380 	return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1381 }
1382 
1383 /* this struct represents 802.11n's RA/TID combination */
1384 struct ieee80211_ra_tid {
1385 	u8 ra[ETH_ALEN];
1386 	u16 tid;
1387 };
1388 
1389 /* this struct holds the value parsing from channel switch IE  */
1390 struct ieee80211_csa_ie {
1391 	struct cfg80211_chan_def chandef;
1392 	u8 mode;
1393 	u8 count;
1394 	u8 ttl;
1395 	u16 pre_value;
1396 };
1397 
1398 /* Parsed Information Elements */
1399 struct ieee802_11_elems {
1400 	const u8 *ie_start;
1401 	size_t total_len;
1402 
1403 	/* pointers to IEs */
1404 	const struct ieee80211_tdls_lnkie *lnk_id;
1405 	const struct ieee80211_ch_switch_timing *ch_sw_timing;
1406 	const u8 *ext_capab;
1407 	const u8 *ssid;
1408 	const u8 *supp_rates;
1409 	const u8 *ds_params;
1410 	const struct ieee80211_tim_ie *tim;
1411 	const u8 *challenge;
1412 	const u8 *rsn;
1413 	const u8 *erp_info;
1414 	const u8 *ext_supp_rates;
1415 	const u8 *wmm_info;
1416 	const u8 *wmm_param;
1417 	const struct ieee80211_ht_cap *ht_cap_elem;
1418 	const struct ieee80211_ht_operation *ht_operation;
1419 	const struct ieee80211_vht_cap *vht_cap_elem;
1420 	const struct ieee80211_vht_operation *vht_operation;
1421 	const struct ieee80211_meshconf_ie *mesh_config;
1422 	const u8 *mesh_id;
1423 	const u8 *peering;
1424 	const __le16 *awake_window;
1425 	const u8 *preq;
1426 	const u8 *prep;
1427 	const u8 *perr;
1428 	const struct ieee80211_rann_ie *rann;
1429 	const struct ieee80211_channel_sw_ie *ch_switch_ie;
1430 	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1431 	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1432 	const u8 *country_elem;
1433 	const u8 *pwr_constr_elem;
1434 	const u8 *cisco_dtpc_elem;
1435 	const struct ieee80211_timeout_interval_ie *timeout_int;
1436 	const u8 *opmode_notif;
1437 	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1438 	const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1439 
1440 	/* length of them, respectively */
1441 	u8 ext_capab_len;
1442 	u8 ssid_len;
1443 	u8 supp_rates_len;
1444 	u8 tim_len;
1445 	u8 challenge_len;
1446 	u8 rsn_len;
1447 	u8 ext_supp_rates_len;
1448 	u8 wmm_info_len;
1449 	u8 wmm_param_len;
1450 	u8 mesh_id_len;
1451 	u8 peering_len;
1452 	u8 preq_len;
1453 	u8 prep_len;
1454 	u8 perr_len;
1455 	u8 country_elem_len;
1456 
1457 	/* whether a parse error occurred while retrieving these elements */
1458 	bool parse_error;
1459 };
1460 
1461 static inline struct ieee80211_local *hw_to_local(
1462 	struct ieee80211_hw *hw)
1463 {
1464 	return container_of(hw, struct ieee80211_local, hw);
1465 }
1466 
1467 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1468 {
1469 	return container_of(txq, struct txq_info, txq);
1470 }
1471 
1472 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1473 {
1474 	return ether_addr_equal(raddr, addr) ||
1475 	       is_broadcast_ether_addr(raddr);
1476 }
1477 
1478 static inline bool
1479 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1480 {
1481 	WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1482 		     status->flag & RX_FLAG_MACTIME_END);
1483 	return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END);
1484 }
1485 
1486 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1487 				     struct ieee80211_rx_status *status,
1488 				     unsigned int mpdu_len,
1489 				     unsigned int mpdu_offset);
1490 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1491 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1492 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1493 				      u32 changed);
1494 void ieee80211_configure_filter(struct ieee80211_local *local);
1495 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1496 
1497 /* STA code */
1498 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1499 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1500 		       struct cfg80211_auth_request *req);
1501 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1502 			struct cfg80211_assoc_request *req);
1503 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1504 			 struct cfg80211_deauth_request *req);
1505 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1506 			   struct cfg80211_disassoc_request *req);
1507 void ieee80211_send_pspoll(struct ieee80211_local *local,
1508 			   struct ieee80211_sub_if_data *sdata);
1509 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency);
1510 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1511 int ieee80211_max_network_latency(struct notifier_block *nb,
1512 				  unsigned long data, void *dummy);
1513 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1514 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1515 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1516 				  struct sk_buff *skb);
1517 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1518 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1519 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1520 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1521 				  __le16 fc, bool acked);
1522 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1523 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1524 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1525 
1526 /* IBSS code */
1527 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1528 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1529 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1530 			      const u8 *bssid, const u8 *addr, u32 supp_rates);
1531 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1532 			struct cfg80211_ibss_params *params);
1533 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1534 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1535 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1536 				   struct sk_buff *skb);
1537 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1538 			      struct cfg80211_csa_settings *csa_settings);
1539 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1540 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1541 
1542 /* OCB code */
1543 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1544 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1545 			     const u8 *bssid, const u8 *addr, u32 supp_rates);
1546 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1547 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1548 		       struct ocb_setup *setup);
1549 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1550 
1551 /* mesh code */
1552 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1553 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1554 				   struct sk_buff *skb);
1555 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1556 			      struct cfg80211_csa_settings *csa_settings);
1557 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1558 
1559 /* scan/BSS handling */
1560 void ieee80211_scan_work(struct work_struct *work);
1561 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1562 				const u8 *ssid, u8 ssid_len,
1563 				struct ieee80211_channel **channels,
1564 				unsigned int n_channels,
1565 				enum nl80211_bss_scan_width scan_width);
1566 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1567 			   struct cfg80211_scan_request *req);
1568 void ieee80211_scan_cancel(struct ieee80211_local *local);
1569 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1570 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1571 
1572 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1573 struct ieee80211_bss *
1574 ieee80211_bss_info_update(struct ieee80211_local *local,
1575 			  struct ieee80211_rx_status *rx_status,
1576 			  struct ieee80211_mgmt *mgmt,
1577 			  size_t len,
1578 			  struct ieee802_11_elems *elems,
1579 			  struct ieee80211_channel *channel);
1580 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1581 			  struct ieee80211_bss *bss);
1582 
1583 /* scheduled scan handling */
1584 int
1585 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1586 				     struct cfg80211_sched_scan_request *req);
1587 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1588 				       struct cfg80211_sched_scan_request *req);
1589 int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
1590 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1591 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1592 
1593 /* off-channel helpers */
1594 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1595 void ieee80211_offchannel_return(struct ieee80211_local *local);
1596 void ieee80211_roc_setup(struct ieee80211_local *local);
1597 void ieee80211_start_next_roc(struct ieee80211_local *local);
1598 void ieee80211_roc_purge(struct ieee80211_local *local,
1599 			 struct ieee80211_sub_if_data *sdata);
1600 void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
1601 void ieee80211_sw_roc_work(struct work_struct *work);
1602 void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
1603 
1604 /* channel switch handling */
1605 void ieee80211_csa_finalize_work(struct work_struct *work);
1606 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1607 			     struct cfg80211_csa_settings *params);
1608 
1609 /* interface handling */
1610 int ieee80211_iface_init(void);
1611 void ieee80211_iface_exit(void);
1612 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1613 		     unsigned char name_assign_type,
1614 		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
1615 		     struct vif_params *params);
1616 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1617 			     enum nl80211_iftype type);
1618 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1619 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1620 u32 ieee80211_idle_off(struct ieee80211_local *local);
1621 void ieee80211_recalc_idle(struct ieee80211_local *local);
1622 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1623 				    const int offset);
1624 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1625 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1626 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1627 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1628 
1629 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1630 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1631 			      bool update_bss);
1632 
1633 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1634 {
1635 	return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1636 }
1637 
1638 /* tx handling */
1639 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1640 void ieee80211_tx_pending(unsigned long data);
1641 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1642 					 struct net_device *dev);
1643 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1644 				       struct net_device *dev);
1645 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1646 				  struct net_device *dev,
1647 				  u32 info_flags);
1648 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1649 			      struct sk_buff_head *skbs);
1650 struct sk_buff *
1651 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1652 			      struct sk_buff *skb, u32 info_flags);
1653 
1654 /* HT */
1655 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1656 				     struct ieee80211_sta_ht_cap *ht_cap);
1657 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1658 				       struct ieee80211_supported_band *sband,
1659 				       const struct ieee80211_ht_cap *ht_cap_ie,
1660 				       struct sta_info *sta);
1661 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1662 			  const u8 *da, u16 tid,
1663 			  u16 initiator, u16 reason_code);
1664 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1665 			       enum ieee80211_smps_mode smps, const u8 *da,
1666 			       const u8 *bssid);
1667 void ieee80211_request_smps_ap_work(struct work_struct *work);
1668 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1669 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1670 				   enum ieee80211_smps_mode smps_mode_new);
1671 
1672 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1673 				     u16 initiator, u16 reason, bool stop);
1674 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1675 				    u16 initiator, u16 reason, bool stop);
1676 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1677 				     u8 dialog_token, u16 timeout,
1678 				     u16 start_seq_num, u16 ba_policy, u16 tid,
1679 				     u16 buf_size, bool tx, bool auto_seq);
1680 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1681 					 enum ieee80211_agg_stop_reason reason);
1682 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1683 			     struct sta_info *sta,
1684 			     struct ieee80211_mgmt *mgmt, size_t len);
1685 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1686 				  struct sta_info *sta,
1687 				  struct ieee80211_mgmt *mgmt,
1688 				  size_t len);
1689 void ieee80211_process_addba_request(struct ieee80211_local *local,
1690 				     struct sta_info *sta,
1691 				     struct ieee80211_mgmt *mgmt,
1692 				     size_t len);
1693 
1694 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1695 				   enum ieee80211_agg_stop_reason reason);
1696 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1697 				    enum ieee80211_agg_stop_reason reason);
1698 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1699 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1700 void ieee80211_ba_session_work(struct work_struct *work);
1701 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1702 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1703 
1704 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1705 
1706 /* VHT */
1707 void
1708 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1709 				    struct ieee80211_supported_band *sband,
1710 				    const struct ieee80211_vht_cap *vht_cap_ie,
1711 				    struct sta_info *sta);
1712 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1713 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1714 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1715 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1716                                   struct sta_info *sta, u8 opmode,
1717                                   enum ieee80211_band band, bool nss_only);
1718 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1719 				 struct sta_info *sta, u8 opmode,
1720 				 enum ieee80211_band band, bool nss_only);
1721 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1722 				      struct ieee80211_sta_vht_cap *vht_cap);
1723 
1724 /* Spectrum management */
1725 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1726 				       struct ieee80211_mgmt *mgmt,
1727 				       size_t len);
1728 /**
1729  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1730  * @sdata: the sdata of the interface which has received the frame
1731  * @elems: parsed 802.11 elements received with the frame
1732  * @current_band: indicates the current band
1733  * @sta_flags: contains information about own capabilities and restrictions
1734  *	to decide which channel switch announcements can be accepted. Only the
1735  *	following subset of &enum ieee80211_sta_flags are evaluated:
1736  *	%IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1737  *	%IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1738  *	%IEEE80211_STA_DISABLE_160MHZ.
1739  * @bssid: the currently connected bssid (for reporting)
1740  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1741 	All of them will be filled with if success only.
1742  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1743  */
1744 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1745 				 struct ieee802_11_elems *elems,
1746 				 enum ieee80211_band current_band,
1747 				 u32 sta_flags, u8 *bssid,
1748 				 struct ieee80211_csa_ie *csa_ie);
1749 
1750 /* Suspend/resume and hw reconfiguration */
1751 int ieee80211_reconfig(struct ieee80211_local *local);
1752 void ieee80211_stop_device(struct ieee80211_local *local);
1753 
1754 int __ieee80211_suspend(struct ieee80211_hw *hw,
1755 			struct cfg80211_wowlan *wowlan);
1756 
1757 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1758 {
1759 	struct ieee80211_local *local = hw_to_local(hw);
1760 
1761 	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1762 	     !test_bit(SCAN_COMPLETED, &local->scanning),
1763 		"%s: resume with hardware scan still in progress\n",
1764 		wiphy_name(hw->wiphy));
1765 
1766 	return ieee80211_reconfig(hw_to_local(hw));
1767 }
1768 
1769 /* utility functions/constants */
1770 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1771 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1772 			enum nl80211_iftype type);
1773 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
1774 			     int rate, int erp, int short_preamble,
1775 			     int shift);
1776 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1777 				     struct ieee80211_hdr *hdr, const u8 *tsc,
1778 				     gfp_t gfp);
1779 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1780 			       bool bss_notify);
1781 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1782 		    struct sta_info *sta, struct sk_buff *skb);
1783 
1784 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1785 				 struct sk_buff *skb, int tid,
1786 				 enum ieee80211_band band);
1787 
1788 static inline void
1789 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1790 			  struct sk_buff *skb, int tid,
1791 			  enum ieee80211_band band)
1792 {
1793 	rcu_read_lock();
1794 	__ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1795 	rcu_read_unlock();
1796 }
1797 
1798 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1799 					struct sk_buff *skb, int tid)
1800 {
1801 	struct ieee80211_chanctx_conf *chanctx_conf;
1802 
1803 	rcu_read_lock();
1804 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1805 	if (WARN_ON(!chanctx_conf)) {
1806 		rcu_read_unlock();
1807 		kfree_skb(skb);
1808 		return;
1809 	}
1810 
1811 	__ieee80211_tx_skb_tid_band(sdata, skb, tid,
1812 				    chanctx_conf->def.chan->band);
1813 	rcu_read_unlock();
1814 }
1815 
1816 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1817 				    struct sk_buff *skb)
1818 {
1819 	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1820 	ieee80211_tx_skb_tid(sdata, skb, 7);
1821 }
1822 
1823 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1824 			       struct ieee802_11_elems *elems,
1825 			       u64 filter, u32 crc);
1826 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1827 					  bool action,
1828 					  struct ieee802_11_elems *elems)
1829 {
1830 	ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1831 }
1832 
1833 static inline bool ieee80211_rx_reorder_ready(struct sk_buff_head *frames)
1834 {
1835 	struct sk_buff *tail = skb_peek_tail(frames);
1836 	struct ieee80211_rx_status *status;
1837 
1838 	if (!tail)
1839 		return false;
1840 
1841 	status = IEEE80211_SKB_RXCB(tail);
1842 	if (status->flag & RX_FLAG_AMSDU_MORE)
1843 		return false;
1844 
1845 	return true;
1846 }
1847 
1848 extern const int ieee802_1d_to_ac[8];
1849 
1850 static inline int ieee80211_ac_from_tid(int tid)
1851 {
1852 	return ieee802_1d_to_ac[tid & 7];
1853 }
1854 
1855 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1856 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1857 void ieee80211_dynamic_ps_timer(unsigned long data);
1858 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1859 			     struct ieee80211_sub_if_data *sdata,
1860 			     int powersave);
1861 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1862 			     struct ieee80211_hdr *hdr);
1863 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1864 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1865 
1866 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1867 				     unsigned long queues,
1868 				     enum queue_stop_reason reason,
1869 				     bool refcounted);
1870 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1871 			       struct ieee80211_sub_if_data *sdata,
1872 			       enum queue_stop_reason reason);
1873 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1874 			       struct ieee80211_sub_if_data *sdata,
1875 			       enum queue_stop_reason reason);
1876 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1877 				     unsigned long queues,
1878 				     enum queue_stop_reason reason,
1879 				     bool refcounted);
1880 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1881 				    enum queue_stop_reason reason,
1882 				    bool refcounted);
1883 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1884 				    enum queue_stop_reason reason,
1885 				    bool refcounted);
1886 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1887 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1888 			       struct sk_buff *skb);
1889 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1890 				struct sk_buff_head *skbs);
1891 void ieee80211_flush_queues(struct ieee80211_local *local,
1892 			    struct ieee80211_sub_if_data *sdata, bool drop);
1893 void __ieee80211_flush_queues(struct ieee80211_local *local,
1894 			      struct ieee80211_sub_if_data *sdata,
1895 			      unsigned int queues, bool drop);
1896 
1897 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
1898 {
1899 	/*
1900 	 * If quiescing is set, we are racing with __ieee80211_suspend.
1901 	 * __ieee80211_suspend flushes the workers after setting quiescing,
1902 	 * and we check quiescing / suspended before enqueing new workers.
1903 	 * We should abort the worker to avoid the races below.
1904 	 */
1905 	if (local->quiescing)
1906 		return false;
1907 
1908 	/*
1909 	 * We might already be suspended if the following scenario occurs:
1910 	 * __ieee80211_suspend		Control path
1911 	 *
1912 	 *				if (local->quiescing)
1913 	 *					return;
1914 	 * local->quiescing = true;
1915 	 * flush_workqueue();
1916 	 *				queue_work(...);
1917 	 * local->suspended = true;
1918 	 * local->quiescing = false;
1919 	 *				worker starts running...
1920 	 */
1921 	if (local->suspended)
1922 		return false;
1923 
1924 	return true;
1925 }
1926 
1927 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
1928 			     struct sta_info *sta,
1929 			     struct txq_info *txq, int tid);
1930 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1931 			 u16 transaction, u16 auth_alg, u16 status,
1932 			 const u8 *extra, size_t extra_len, const u8 *bssid,
1933 			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
1934 			 u32 tx_flags);
1935 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1936 				    const u8 *bssid, u16 stype, u16 reason,
1937 				    bool send_frame, u8 *frame_buf);
1938 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1939 			     size_t buffer_len,
1940 			     struct ieee80211_scan_ies *ie_desc,
1941 			     const u8 *ie, size_t ie_len,
1942 			     u8 bands_used, u32 *rate_masks,
1943 			     struct cfg80211_chan_def *chandef);
1944 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1945 					  const u8 *src, const u8 *dst,
1946 					  u32 ratemask,
1947 					  struct ieee80211_channel *chan,
1948 					  const u8 *ssid, size_t ssid_len,
1949 					  const u8 *ie, size_t ie_len,
1950 					  bool directed);
1951 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1952 			      const u8 *src, const u8 *dst,
1953 			      const u8 *ssid, size_t ssid_len,
1954 			      const u8 *ie, size_t ie_len,
1955 			      u32 ratemask, bool directed, u32 tx_flags,
1956 			      struct ieee80211_channel *channel, bool scan);
1957 
1958 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1959 			    struct ieee802_11_elems *elems,
1960 			    enum ieee80211_band band, u32 *basic_rates);
1961 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
1962 				 enum ieee80211_smps_mode smps_mode);
1963 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
1964 				enum ieee80211_smps_mode smps_mode);
1965 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
1966 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
1967 
1968 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
1969 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1970 			      u16 cap);
1971 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
1972 			       const struct cfg80211_chan_def *chandef,
1973 			       u16 prot_mode);
1974 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1975 			       u32 cap);
1976 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1977 				const struct cfg80211_chan_def *chandef);
1978 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
1979 			     const struct ieee80211_supported_band *sband,
1980 			     const u8 *srates, int srates_len, u32 *rates);
1981 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
1982 			    struct sk_buff *skb, bool need_basic,
1983 			    enum ieee80211_band band);
1984 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
1985 				struct sk_buff *skb, bool need_basic,
1986 				enum ieee80211_band band);
1987 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
1988 
1989 /* channel management */
1990 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1991 				  const struct ieee80211_ht_operation *ht_oper,
1992 				  struct cfg80211_chan_def *chandef);
1993 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
1994 				   const struct ieee80211_vht_operation *oper,
1995 				   struct cfg80211_chan_def *chandef);
1996 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
1997 
1998 int __must_check
1999 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
2000 			  const struct cfg80211_chan_def *chandef,
2001 			  enum ieee80211_chanctx_mode mode);
2002 int __must_check
2003 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
2004 			      const struct cfg80211_chan_def *chandef,
2005 			      enum ieee80211_chanctx_mode mode,
2006 			      bool radar_required);
2007 int __must_check
2008 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2009 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2010 
2011 int __must_check
2012 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2013 			       const struct cfg80211_chan_def *chandef,
2014 			       u32 *changed);
2015 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2016 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2017 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2018 					 bool clear);
2019 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2020 			       struct ieee80211_chanctx *ctx);
2021 
2022 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2023 				   struct ieee80211_chanctx *chanctx);
2024 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2025 				      struct ieee80211_chanctx *ctx);
2026 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2027 
2028 void ieee80211_dfs_cac_timer(unsigned long data);
2029 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2030 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2031 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2032 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2033 			      struct cfg80211_csa_settings *csa_settings);
2034 
2035 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2036 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2037 const struct ieee80211_cipher_scheme *
2038 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2039 		 enum nl80211_iftype iftype);
2040 int ieee80211_cs_headroom(struct ieee80211_local *local,
2041 			  struct cfg80211_crypto_settings *crypto,
2042 			  enum nl80211_iftype iftype);
2043 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2044 			   struct ieee80211_sub_if_data *sdata);
2045 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2046 				 const struct cfg80211_chan_def *chandef,
2047 				 enum ieee80211_chanctx_mode chanmode,
2048 				 u8 radar_detect);
2049 int ieee80211_max_num_channels(struct ieee80211_local *local);
2050 
2051 /* TDLS */
2052 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2053 			const u8 *peer, u8 action_code, u8 dialog_token,
2054 			u16 status_code, u32 peer_capability,
2055 			bool initiator, const u8 *extra_ies,
2056 			size_t extra_ies_len);
2057 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2058 			const u8 *peer, enum nl80211_tdls_operation oper);
2059 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2060 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2061 				  const u8 *addr, u8 oper_class,
2062 				  struct cfg80211_chan_def *chandef);
2063 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2064 					  struct net_device *dev,
2065 					  const u8 *addr);
2066 void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2067 					   struct sk_buff *skb);
2068 
2069 extern const struct ethtool_ops ieee80211_ethtool_ops;
2070 
2071 #ifdef CONFIG_MAC80211_NOINLINE
2072 #define debug_noinline noinline
2073 #else
2074 #define debug_noinline
2075 #endif
2076 
2077 #endif /* IEEE80211_I_H */
2078