xref: /openbmc/linux/net/mac80211/ieee80211_i.h (revision fb8d6c8d)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright 2002-2005, Instant802 Networks, Inc.
4  * Copyright 2005, Devicescape Software, Inc.
5  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
6  * Copyright 2007-2010	Johannes Berg <johannes@sipsolutions.net>
7  * Copyright 2013-2015  Intel Mobile Communications GmbH
8  * Copyright (C) 2018-2019 Intel Corporation
9  */
10 
11 #ifndef IEEE80211_I_H
12 #define IEEE80211_I_H
13 
14 #include <linux/kernel.h>
15 #include <linux/device.h>
16 #include <linux/if_ether.h>
17 #include <linux/interrupt.h>
18 #include <linux/list.h>
19 #include <linux/netdevice.h>
20 #include <linux/skbuff.h>
21 #include <linux/workqueue.h>
22 #include <linux/types.h>
23 #include <linux/spinlock.h>
24 #include <linux/etherdevice.h>
25 #include <linux/leds.h>
26 #include <linux/idr.h>
27 #include <linux/rhashtable.h>
28 #include <net/ieee80211_radiotap.h>
29 #include <net/cfg80211.h>
30 #include <net/mac80211.h>
31 #include <net/fq.h>
32 #include "key.h"
33 #include "sta_info.h"
34 #include "debug.h"
35 
36 extern const struct cfg80211_ops mac80211_config_ops;
37 
38 struct ieee80211_local;
39 
40 /* Maximum number of broadcast/multicast frames to buffer when some of the
41  * associated stations are using power saving. */
42 #define AP_MAX_BC_BUFFER 128
43 
44 /* Maximum number of frames buffered to all STAs, including multicast frames.
45  * Note: increasing this limit increases the potential memory requirement. Each
46  * frame can be up to about 2 kB long. */
47 #define TOTAL_MAX_TX_BUFFER 512
48 
49 /* Required encryption head and tailroom */
50 #define IEEE80211_ENCRYPT_HEADROOM 8
51 #define IEEE80211_ENCRYPT_TAILROOM 18
52 
53 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
54  * reception of at least three fragmented frames. This limit can be increased
55  * by changing this define, at the cost of slower frame reassembly and
56  * increased memory use (about 2 kB of RAM per entry). */
57 #define IEEE80211_FRAGMENT_MAX 4
58 
59 /* power level hasn't been configured (or set to automatic) */
60 #define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
61 
62 /*
63  * Some APs experience problems when working with U-APSD. Decreasing the
64  * probability of that happening by using legacy mode for all ACs but VO isn't
65  * enough.
66  *
67  * Cisco 4410N originally forced us to enable VO by default only because it
68  * treated non-VO ACs as legacy.
69  *
70  * However some APs (notably Netgear R7000) silently reclassify packets to
71  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
72  * clients would never see some frames (e.g. ARP responses) or would fetch them
73  * accidentally after a long time.
74  *
75  * It makes little sense to enable u-APSD queues by default because it needs
76  * userspace applications to be aware of it to actually take advantage of the
77  * possible additional powersavings. Implicitly depending on driver autotrigger
78  * frame support doesn't make much sense.
79  */
80 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
81 
82 #define IEEE80211_DEFAULT_MAX_SP_LEN		\
83 	IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
84 
85 extern const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS];
86 
87 #define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
88 
89 #define IEEE80211_MAX_NAN_INSTANCE_ID 255
90 
91 struct ieee80211_fragment_entry {
92 	struct sk_buff_head skb_list;
93 	unsigned long first_frag_time;
94 	u16 seq;
95 	u16 extra_len;
96 	u16 last_frag;
97 	u8 rx_queue;
98 	bool check_sequential_pn; /* needed for CCMP/GCMP */
99 	u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
100 };
101 
102 
103 struct ieee80211_bss {
104 	u32 device_ts_beacon, device_ts_presp;
105 
106 	bool wmm_used;
107 	bool uapsd_supported;
108 
109 #define IEEE80211_MAX_SUPP_RATES 32
110 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
111 	size_t supp_rates_len;
112 	struct ieee80211_rate *beacon_rate;
113 
114 	/*
115 	 * During association, we save an ERP value from a probe response so
116 	 * that we can feed ERP info to the driver when handling the
117 	 * association completes. these fields probably won't be up-to-date
118 	 * otherwise, you probably don't want to use them.
119 	 */
120 	bool has_erp_value;
121 	u8 erp_value;
122 
123 	/* Keep track of the corruption of the last beacon/probe response. */
124 	u8 corrupt_data;
125 
126 	/* Keep track of what bits of information we have valid info for. */
127 	u8 valid_data;
128 };
129 
130 /**
131  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
132  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
133  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
134  *
135  * These are bss flags that are attached to a bss in the
136  * @corrupt_data field of &struct ieee80211_bss.
137  */
138 enum ieee80211_bss_corrupt_data_flags {
139 	IEEE80211_BSS_CORRUPT_BEACON		= BIT(0),
140 	IEEE80211_BSS_CORRUPT_PROBE_RESP	= BIT(1)
141 };
142 
143 /**
144  * enum ieee80211_valid_data_flags - BSS valid data flags
145  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
146  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
147  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
148  *
149  * These are bss flags that are attached to a bss in the
150  * @valid_data field of &struct ieee80211_bss.  They show which parts
151  * of the data structure were received as a result of an un-corrupted
152  * beacon/probe response.
153  */
154 enum ieee80211_bss_valid_data_flags {
155 	IEEE80211_BSS_VALID_WMM			= BIT(1),
156 	IEEE80211_BSS_VALID_RATES		= BIT(2),
157 	IEEE80211_BSS_VALID_ERP			= BIT(3)
158 };
159 
160 typedef unsigned __bitwise ieee80211_tx_result;
161 #define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
162 #define TX_DROP		((__force ieee80211_tx_result) 1u)
163 #define TX_QUEUED	((__force ieee80211_tx_result) 2u)
164 
165 #define IEEE80211_TX_NO_SEQNO		BIT(0)
166 #define IEEE80211_TX_UNICAST		BIT(1)
167 #define IEEE80211_TX_PS_BUFFERED	BIT(2)
168 
169 struct ieee80211_tx_data {
170 	struct sk_buff *skb;
171 	struct sk_buff_head skbs;
172 	struct ieee80211_local *local;
173 	struct ieee80211_sub_if_data *sdata;
174 	struct sta_info *sta;
175 	struct ieee80211_key *key;
176 	struct ieee80211_tx_rate rate;
177 
178 	unsigned int flags;
179 };
180 
181 
182 typedef unsigned __bitwise ieee80211_rx_result;
183 #define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
184 #define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
185 #define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
186 #define RX_QUEUED		((__force ieee80211_rx_result) 3u)
187 
188 /**
189  * enum ieee80211_packet_rx_flags - packet RX flags
190  * @IEEE80211_RX_AMSDU: a-MSDU packet
191  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
192  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
193  *
194  * These are per-frame flags that are attached to a frame in the
195  * @rx_flags field of &struct ieee80211_rx_status.
196  */
197 enum ieee80211_packet_rx_flags {
198 	IEEE80211_RX_AMSDU			= BIT(3),
199 	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
200 	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
201 };
202 
203 /**
204  * enum ieee80211_rx_flags - RX data flags
205  *
206  * @IEEE80211_RX_CMNTR: received on cooked monitor already
207  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
208  *	to cfg80211_report_obss_beacon().
209  *
210  * These flags are used across handling multiple interfaces
211  * for a single frame.
212  */
213 enum ieee80211_rx_flags {
214 	IEEE80211_RX_CMNTR		= BIT(0),
215 	IEEE80211_RX_BEACON_REPORTED	= BIT(1),
216 };
217 
218 struct ieee80211_rx_data {
219 	struct napi_struct *napi;
220 	struct sk_buff *skb;
221 	struct ieee80211_local *local;
222 	struct ieee80211_sub_if_data *sdata;
223 	struct sta_info *sta;
224 	struct ieee80211_key *key;
225 
226 	unsigned int flags;
227 
228 	/*
229 	 * Index into sequence numbers array, 0..16
230 	 * since the last (16) is used for non-QoS,
231 	 * will be 16 on non-QoS frames.
232 	 */
233 	int seqno_idx;
234 
235 	/*
236 	 * Index into the security IV/PN arrays, 0..16
237 	 * since the last (16) is used for CCMP-encrypted
238 	 * management frames, will be set to 16 on mgmt
239 	 * frames and 0 on non-QoS frames.
240 	 */
241 	int security_idx;
242 
243 	u32 tkip_iv32;
244 	u16 tkip_iv16;
245 };
246 
247 struct ieee80211_csa_settings {
248 	const u16 *counter_offsets_beacon;
249 	const u16 *counter_offsets_presp;
250 
251 	int n_counter_offsets_beacon;
252 	int n_counter_offsets_presp;
253 
254 	u8 count;
255 };
256 
257 struct beacon_data {
258 	u8 *head, *tail;
259 	int head_len, tail_len;
260 	struct ieee80211_meshconf_ie *meshconf;
261 	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
262 	u8 csa_current_counter;
263 	struct rcu_head rcu_head;
264 };
265 
266 struct probe_resp {
267 	struct rcu_head rcu_head;
268 	int len;
269 	u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
270 	u8 data[0];
271 };
272 
273 struct ps_data {
274 	/* yes, this looks ugly, but guarantees that we can later use
275 	 * bitmap_empty :)
276 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
277 	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
278 			__aligned(__alignof__(unsigned long));
279 	struct sk_buff_head bc_buf;
280 	atomic_t num_sta_ps; /* number of stations in PS mode */
281 	int dtim_count;
282 	bool dtim_bc_mc;
283 };
284 
285 struct ieee80211_if_ap {
286 	struct beacon_data __rcu *beacon;
287 	struct probe_resp __rcu *probe_resp;
288 
289 	/* to be used after channel switch. */
290 	struct cfg80211_beacon_data *next_beacon;
291 	struct list_head vlans; /* write-protected with RTNL and local->mtx */
292 
293 	struct ps_data ps;
294 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
295 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
296 			 driver_smps_mode; /* smps mode request */
297 
298 	struct work_struct request_smps_work;
299 	bool multicast_to_unicast;
300 };
301 
302 struct ieee80211_if_wds {
303 	struct sta_info *sta;
304 	u8 remote_addr[ETH_ALEN];
305 };
306 
307 struct ieee80211_if_vlan {
308 	struct list_head list; /* write-protected with RTNL and local->mtx */
309 
310 	/* used for all tx if the VLAN is configured to 4-addr mode */
311 	struct sta_info __rcu *sta;
312 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
313 };
314 
315 struct mesh_stats {
316 	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
317 	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
318 	__u32 fwded_frames;		/* Mesh total forwarded frames */
319 	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
320 	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
321 	__u32 dropped_frames_congestion;/* Not forwarded due to congestion */
322 };
323 
324 #define PREQ_Q_F_START		0x1
325 #define PREQ_Q_F_REFRESH	0x2
326 struct mesh_preq_queue {
327 	struct list_head list;
328 	u8 dst[ETH_ALEN];
329 	u8 flags;
330 };
331 
332 struct ieee80211_roc_work {
333 	struct list_head list;
334 
335 	struct ieee80211_sub_if_data *sdata;
336 
337 	struct ieee80211_channel *chan;
338 
339 	bool started, abort, hw_begun, notified;
340 	bool on_channel;
341 
342 	unsigned long start_time;
343 
344 	u32 duration, req_duration;
345 	struct sk_buff *frame;
346 	u64 cookie, mgmt_tx_cookie;
347 	enum ieee80211_roc_type type;
348 };
349 
350 /* flags used in struct ieee80211_if_managed.flags */
351 enum ieee80211_sta_flags {
352 	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
353 	IEEE80211_STA_CONTROL_PORT	= BIT(2),
354 	IEEE80211_STA_DISABLE_HT	= BIT(4),
355 	IEEE80211_STA_MFP_ENABLED	= BIT(6),
356 	IEEE80211_STA_UAPSD_ENABLED	= BIT(7),
357 	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),
358 	IEEE80211_STA_RESET_SIGNAL_AVE	= BIT(9),
359 	IEEE80211_STA_DISABLE_40MHZ	= BIT(10),
360 	IEEE80211_STA_DISABLE_VHT	= BIT(11),
361 	IEEE80211_STA_DISABLE_80P80MHZ	= BIT(12),
362 	IEEE80211_STA_DISABLE_160MHZ	= BIT(13),
363 	IEEE80211_STA_DISABLE_WMM	= BIT(14),
364 	IEEE80211_STA_ENABLE_RRM	= BIT(15),
365 	IEEE80211_STA_DISABLE_HE	= BIT(16),
366 };
367 
368 struct ieee80211_mgd_auth_data {
369 	struct cfg80211_bss *bss;
370 	unsigned long timeout;
371 	int tries;
372 	u16 algorithm, expected_transaction;
373 
374 	u8 key[WLAN_KEY_LEN_WEP104];
375 	u8 key_len, key_idx;
376 	bool done;
377 	bool peer_confirmed;
378 	bool timeout_started;
379 
380 	u16 sae_trans, sae_status;
381 	size_t data_len;
382 	u8 data[];
383 };
384 
385 struct ieee80211_mgd_assoc_data {
386 	struct cfg80211_bss *bss;
387 	const u8 *supp_rates;
388 
389 	unsigned long timeout;
390 	int tries;
391 
392 	u16 capability;
393 	u8 prev_bssid[ETH_ALEN];
394 	u8 ssid[IEEE80211_MAX_SSID_LEN];
395 	u8 ssid_len;
396 	u8 supp_rates_len;
397 	bool wmm, uapsd;
398 	bool need_beacon;
399 	bool synced;
400 	bool timeout_started;
401 
402 	u8 ap_ht_param;
403 
404 	struct ieee80211_vht_cap ap_vht_cap;
405 
406 	u8 fils_nonces[2 * FILS_NONCE_LEN];
407 	u8 fils_kek[FILS_MAX_KEK_LEN];
408 	size_t fils_kek_len;
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 DECLARE_EWMA(beacon_signal, 4, 4)
433 
434 struct ieee80211_if_managed {
435 	struct timer_list timer;
436 	struct timer_list conn_mon_timer;
437 	struct timer_list bcn_mon_timer;
438 	struct timer_list chswitch_timer;
439 	struct work_struct monitor_work;
440 	struct work_struct chswitch_work;
441 	struct work_struct beacon_connection_loss_work;
442 	struct work_struct csa_connection_drop_work;
443 
444 	unsigned long beacon_timeout;
445 	unsigned long probe_timeout;
446 	int probe_send_count;
447 	bool nullfunc_failed;
448 	bool connection_loss;
449 
450 	struct cfg80211_bss *associated;
451 	struct ieee80211_mgd_auth_data *auth_data;
452 	struct ieee80211_mgd_assoc_data *assoc_data;
453 
454 	u8 bssid[ETH_ALEN] __aligned(2);
455 
456 	u16 aid;
457 
458 	bool powersave; /* powersave requested for this iface */
459 	bool broken_ap; /* AP is broken -- turn off powersave */
460 	bool have_beacon;
461 	u8 dtim_period;
462 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
463 				 driver_smps_mode; /* smps mode request */
464 
465 	struct work_struct request_smps_work;
466 
467 	unsigned int flags;
468 
469 	bool csa_waiting_bcn;
470 	bool csa_ignored_same_chan;
471 
472 	bool beacon_crc_valid;
473 	u32 beacon_crc;
474 
475 	bool status_acked;
476 	bool status_received;
477 	__le16 status_fc;
478 
479 	enum {
480 		IEEE80211_MFP_DISABLED,
481 		IEEE80211_MFP_OPTIONAL,
482 		IEEE80211_MFP_REQUIRED
483 	} mfp; /* management frame protection */
484 
485 	/*
486 	 * Bitmask of enabled u-apsd queues,
487 	 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
488 	 * to take effect.
489 	 */
490 	unsigned int uapsd_queues;
491 
492 	/*
493 	 * Maximum number of buffered frames AP can deliver during a
494 	 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
495 	 * Needs a new association to take effect.
496 	 */
497 	unsigned int uapsd_max_sp_len;
498 
499 	int wmm_last_param_set;
500 	int mu_edca_last_param_set;
501 
502 	u8 use_4addr;
503 
504 	s16 p2p_noa_index;
505 
506 	struct ewma_beacon_signal ave_beacon_signal;
507 
508 	/*
509 	 * Number of Beacon frames used in ave_beacon_signal. This can be used
510 	 * to avoid generating less reliable cqm events that would be based
511 	 * only on couple of received frames.
512 	 */
513 	unsigned int count_beacon_signal;
514 
515 	/* Number of times beacon loss was invoked. */
516 	unsigned int beacon_loss_count;
517 
518 	/*
519 	 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
520 	 * that triggered a cqm event. 0 indicates that no event has been
521 	 * generated for the current association.
522 	 */
523 	int last_cqm_event_signal;
524 
525 	/*
526 	 * State variables for keeping track of RSSI of the AP currently
527 	 * connected to and informing driver when RSSI has gone
528 	 * below/above a certain threshold.
529 	 */
530 	int rssi_min_thold, rssi_max_thold;
531 	int last_ave_beacon_signal;
532 
533 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
534 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
535 	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
536 	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
537 
538 	/* TDLS support */
539 	u8 tdls_peer[ETH_ALEN] __aligned(2);
540 	struct delayed_work tdls_peer_del_work;
541 	struct sk_buff *orig_teardown_skb; /* The original teardown skb */
542 	struct sk_buff *teardown_skb; /* A copy to send through the AP */
543 	spinlock_t teardown_lock; /* To lock changing teardown_skb */
544 	bool tdls_chan_switch_prohibited;
545 	bool tdls_wider_bw_prohibited;
546 
547 	/* WMM-AC TSPEC support */
548 	struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
549 	/* Use a separate work struct so that we can do something here
550 	 * while the sdata->work is flushing the queues, for example.
551 	 * otherwise, in scenarios where we hardly get any traffic out
552 	 * on the BE queue, but there's a lot of VO traffic, we might
553 	 * get stuck in a downgraded situation and flush takes forever.
554 	 */
555 	struct delayed_work tx_tspec_wk;
556 
557 	/* Information elements from the last transmitted (Re)Association
558 	 * Request frame.
559 	 */
560 	u8 *assoc_req_ies;
561 	size_t assoc_req_ies_len;
562 };
563 
564 struct ieee80211_if_ibss {
565 	struct timer_list timer;
566 	struct work_struct csa_connection_drop_work;
567 
568 	unsigned long last_scan_completed;
569 
570 	u32 basic_rates;
571 
572 	bool fixed_bssid;
573 	bool fixed_channel;
574 	bool privacy;
575 
576 	bool control_port;
577 	bool userspace_handles_dfs;
578 
579 	u8 bssid[ETH_ALEN] __aligned(2);
580 	u8 ssid[IEEE80211_MAX_SSID_LEN];
581 	u8 ssid_len, ie_len;
582 	u8 *ie;
583 	struct cfg80211_chan_def chandef;
584 
585 	unsigned long ibss_join_req;
586 	/* probe response/beacon for IBSS */
587 	struct beacon_data __rcu *presp;
588 
589 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
590 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
591 
592 	spinlock_t incomplete_lock;
593 	struct list_head incomplete_stations;
594 
595 	enum {
596 		IEEE80211_IBSS_MLME_SEARCH,
597 		IEEE80211_IBSS_MLME_JOINED,
598 	} state;
599 };
600 
601 /**
602  * struct ieee80211_if_ocb - OCB mode state
603  *
604  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
605  * @wrkq_flags: OCB deferred task action
606  * @incomplete_lock: delayed STA insertion lock
607  * @incomplete_stations: list of STAs waiting for delayed insertion
608  * @joined: indication if the interface is connected to an OCB network
609  */
610 struct ieee80211_if_ocb {
611 	struct timer_list housekeeping_timer;
612 	unsigned long wrkq_flags;
613 
614 	spinlock_t incomplete_lock;
615 	struct list_head incomplete_stations;
616 
617 	bool joined;
618 };
619 
620 /**
621  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
622  *
623  * these declarations define the interface, which enables
624  * vendor-specific mesh synchronization
625  *
626  */
627 struct ieee802_11_elems;
628 struct ieee80211_mesh_sync_ops {
629 	void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
630 			     u16 stype,
631 			     struct ieee80211_mgmt *mgmt,
632 			     struct ieee802_11_elems *elems,
633 			     struct ieee80211_rx_status *rx_status);
634 
635 	/* should be called with beacon_data under RCU read lock */
636 	void (*adjust_tsf)(struct ieee80211_sub_if_data *sdata,
637 			   struct beacon_data *beacon);
638 	/* add other framework functions here */
639 };
640 
641 struct mesh_csa_settings {
642 	struct rcu_head rcu_head;
643 	struct cfg80211_csa_settings settings;
644 };
645 
646 struct ieee80211_if_mesh {
647 	struct timer_list housekeeping_timer;
648 	struct timer_list mesh_path_timer;
649 	struct timer_list mesh_path_root_timer;
650 
651 	unsigned long wrkq_flags;
652 	unsigned long mbss_changed;
653 
654 	bool userspace_handles_dfs;
655 
656 	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
657 	size_t mesh_id_len;
658 	/* Active Path Selection Protocol Identifier */
659 	u8 mesh_pp_id;
660 	/* Active Path Selection Metric Identifier */
661 	u8 mesh_pm_id;
662 	/* Congestion Control Mode Identifier */
663 	u8 mesh_cc_id;
664 	/* Synchronization Protocol Identifier */
665 	u8 mesh_sp_id;
666 	/* Authentication Protocol Identifier */
667 	u8 mesh_auth_id;
668 	/* Local mesh Sequence Number */
669 	u32 sn;
670 	/* Last used PREQ ID */
671 	u32 preq_id;
672 	atomic_t mpaths;
673 	/* Timestamp of last SN update */
674 	unsigned long last_sn_update;
675 	/* Time when it's ok to send next PERR */
676 	unsigned long next_perr;
677 	/* Timestamp of last PREQ sent */
678 	unsigned long last_preq;
679 	struct mesh_rmc *rmc;
680 	spinlock_t mesh_preq_queue_lock;
681 	struct mesh_preq_queue preq_queue;
682 	int preq_queue_len;
683 	struct mesh_stats mshstats;
684 	struct mesh_config mshcfg;
685 	atomic_t estab_plinks;
686 	u32 mesh_seqnum;
687 	bool accepting_plinks;
688 	int num_gates;
689 	struct beacon_data __rcu *beacon;
690 	const u8 *ie;
691 	u8 ie_len;
692 	enum {
693 		IEEE80211_MESH_SEC_NONE = 0x0,
694 		IEEE80211_MESH_SEC_AUTHED = 0x1,
695 		IEEE80211_MESH_SEC_SECURED = 0x2,
696 	} security;
697 	bool user_mpm;
698 	/* Extensible Synchronization Framework */
699 	const struct ieee80211_mesh_sync_ops *sync_ops;
700 	s64 sync_offset_clockdrift_max;
701 	spinlock_t sync_offset_lock;
702 	/* mesh power save */
703 	enum nl80211_mesh_power_mode nonpeer_pm;
704 	int ps_peers_light_sleep;
705 	int ps_peers_deep_sleep;
706 	struct ps_data ps;
707 	/* Channel Switching Support */
708 	struct mesh_csa_settings __rcu *csa;
709 	enum {
710 		IEEE80211_MESH_CSA_ROLE_NONE,
711 		IEEE80211_MESH_CSA_ROLE_INIT,
712 		IEEE80211_MESH_CSA_ROLE_REPEATER,
713 	} csa_role;
714 	u8 chsw_ttl;
715 	u16 pre_value;
716 
717 	/* offset from skb->data while building IE */
718 	int meshconf_offset;
719 
720 	struct mesh_table *mesh_paths;
721 	struct mesh_table *mpp_paths; /* Store paths for MPP&MAP */
722 	int mesh_paths_generation;
723 	int mpp_paths_generation;
724 };
725 
726 #ifdef CONFIG_MAC80211_MESH
727 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
728 	do { (msh)->mshstats.name++; } while (0)
729 #else
730 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
731 	do { } while (0)
732 #endif
733 
734 /**
735  * enum ieee80211_sub_if_data_flags - virtual interface flags
736  *
737  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
738  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
739  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
740  *	associated stations and deliver multicast frames both
741  *	back to wireless media and to the local net stack.
742  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
743  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
744  */
745 enum ieee80211_sub_if_data_flags {
746 	IEEE80211_SDATA_ALLMULTI		= BIT(0),
747 	IEEE80211_SDATA_OPERATING_GMODE		= BIT(2),
748 	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
749 	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
750 	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
751 };
752 
753 /**
754  * enum ieee80211_sdata_state_bits - virtual interface state bits
755  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
756  *	mirrors netif_running() but is separate for interface type
757  *	change handling while the interface is up
758  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
759  *	mode, so queues are stopped
760  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
761  *	to offchannel, reset when offchannel returns
762  */
763 enum ieee80211_sdata_state_bits {
764 	SDATA_STATE_RUNNING,
765 	SDATA_STATE_OFFCHANNEL,
766 	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
767 };
768 
769 /**
770  * enum ieee80211_chanctx_mode - channel context configuration mode
771  *
772  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
773  *	multiple interfaces
774  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
775  *	only by a single interface. This can be used for example for
776  *	non-fixed channel IBSS.
777  */
778 enum ieee80211_chanctx_mode {
779 	IEEE80211_CHANCTX_SHARED,
780 	IEEE80211_CHANCTX_EXCLUSIVE
781 };
782 
783 /**
784  * enum ieee80211_chanctx_replace_state - channel context replacement state
785  *
786  * This is used for channel context in-place reservations that require channel
787  * context switch/swap.
788  *
789  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
790  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
791  *	by a (not yet registered) channel context pointed by %replace_ctx.
792  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
793  *	replaces an existing channel context pointed to by %replace_ctx.
794  */
795 enum ieee80211_chanctx_replace_state {
796 	IEEE80211_CHANCTX_REPLACE_NONE,
797 	IEEE80211_CHANCTX_WILL_BE_REPLACED,
798 	IEEE80211_CHANCTX_REPLACES_OTHER,
799 };
800 
801 struct ieee80211_chanctx {
802 	struct list_head list;
803 	struct rcu_head rcu_head;
804 
805 	struct list_head assigned_vifs;
806 	struct list_head reserved_vifs;
807 
808 	enum ieee80211_chanctx_replace_state replace_state;
809 	struct ieee80211_chanctx *replace_ctx;
810 
811 	enum ieee80211_chanctx_mode mode;
812 	bool driver_present;
813 
814 	struct ieee80211_chanctx_conf conf;
815 };
816 
817 struct mac80211_qos_map {
818 	struct cfg80211_qos_map qos_map;
819 	struct rcu_head rcu_head;
820 };
821 
822 enum txq_info_flags {
823 	IEEE80211_TXQ_STOP,
824 	IEEE80211_TXQ_AMPDU,
825 	IEEE80211_TXQ_NO_AMSDU,
826 	IEEE80211_TXQ_STOP_NETIF_TX,
827 };
828 
829 /**
830  * struct txq_info - per tid queue
831  *
832  * @tin: contains packets split into multiple flows
833  * @def_flow: used as a fallback flow when a packet destined to @tin hashes to
834  *	a fq_flow which is already owned by a different tin
835  * @def_cvars: codel vars for @def_flow
836  * @frags: used to keep fragments created after dequeue
837  * @schedule_order: used with ieee80211_local->active_txqs
838  * @schedule_round: counter to prevent infinite loops on TXQ scheduling
839  */
840 struct txq_info {
841 	struct fq_tin tin;
842 	struct fq_flow def_flow;
843 	struct codel_vars def_cvars;
844 	struct codel_stats cstats;
845 	struct sk_buff_head frags;
846 	struct list_head schedule_order;
847 	u16 schedule_round;
848 	unsigned long flags;
849 
850 	/* keep last! */
851 	struct ieee80211_txq txq;
852 };
853 
854 struct ieee80211_if_mntr {
855 	u32 flags;
856 	u8 mu_follow_addr[ETH_ALEN] __aligned(2);
857 
858 	struct list_head list;
859 };
860 
861 /**
862  * struct ieee80211_if_nan - NAN state
863  *
864  * @conf: current NAN configuration
865  * @func_ids: a bitmap of available instance_id's
866  */
867 struct ieee80211_if_nan {
868 	struct cfg80211_nan_conf conf;
869 
870 	/* protects function_inst_ids */
871 	spinlock_t func_lock;
872 	struct idr function_inst_ids;
873 };
874 
875 struct ieee80211_sub_if_data {
876 	struct list_head list;
877 
878 	struct wireless_dev wdev;
879 
880 	/* keys */
881 	struct list_head key_list;
882 
883 	/* count for keys needing tailroom space allocation */
884 	int crypto_tx_tailroom_needed_cnt;
885 	int crypto_tx_tailroom_pending_dec;
886 	struct delayed_work dec_tailroom_needed_wk;
887 
888 	struct net_device *dev;
889 	struct ieee80211_local *local;
890 
891 	unsigned int flags;
892 
893 	unsigned long state;
894 
895 	char name[IFNAMSIZ];
896 
897 	/* Fragment table for host-based reassembly */
898 	struct ieee80211_fragment_entry	fragments[IEEE80211_FRAGMENT_MAX];
899 	unsigned int fragment_next;
900 
901 	/* TID bitmap for NoAck policy */
902 	u16 noack_map;
903 
904 	/* bit field of ACM bits (BIT(802.1D tag)) */
905 	u8 wmm_acm;
906 
907 	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
908 	struct ieee80211_key __rcu *default_unicast_key;
909 	struct ieee80211_key __rcu *default_multicast_key;
910 	struct ieee80211_key __rcu *default_mgmt_key;
911 
912 	u16 sequence_number;
913 	__be16 control_port_protocol;
914 	bool control_port_no_encrypt;
915 	bool control_port_over_nl80211;
916 	int encrypt_headroom;
917 
918 	atomic_t num_tx_queued;
919 	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
920 	struct mac80211_qos_map __rcu *qos_map;
921 
922 	struct work_struct csa_finalize_work;
923 	bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
924 	struct cfg80211_chan_def csa_chandef;
925 
926 	struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
927 	struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
928 
929 	/* context reservation -- protected with chanctx_mtx */
930 	struct ieee80211_chanctx *reserved_chanctx;
931 	struct cfg80211_chan_def reserved_chandef;
932 	bool reserved_radar_required;
933 	bool reserved_ready;
934 
935 	/* used to reconfigure hardware SM PS */
936 	struct work_struct recalc_smps;
937 
938 	struct work_struct work;
939 	struct sk_buff_head skb_queue;
940 
941 	u8 needed_rx_chains;
942 	enum ieee80211_smps_mode smps_mode;
943 
944 	int user_power_level; /* in dBm */
945 	int ap_power_level; /* in dBm */
946 
947 	bool radar_required;
948 	struct delayed_work dfs_cac_timer_work;
949 
950 	/*
951 	 * AP this belongs to: self in AP mode and
952 	 * corresponding AP in VLAN mode, NULL for
953 	 * all others (might be needed later in IBSS)
954 	 */
955 	struct ieee80211_if_ap *bss;
956 
957 	/* bitmap of allowed (non-MCS) rate indexes for rate control */
958 	u32 rc_rateidx_mask[NUM_NL80211_BANDS];
959 
960 	bool rc_has_mcs_mask[NUM_NL80211_BANDS];
961 	u8  rc_rateidx_mcs_mask[NUM_NL80211_BANDS][IEEE80211_HT_MCS_MASK_LEN];
962 
963 	bool rc_has_vht_mcs_mask[NUM_NL80211_BANDS];
964 	u16 rc_rateidx_vht_mcs_mask[NUM_NL80211_BANDS][NL80211_VHT_NSS_MAX];
965 
966 	union {
967 		struct ieee80211_if_ap ap;
968 		struct ieee80211_if_wds wds;
969 		struct ieee80211_if_vlan vlan;
970 		struct ieee80211_if_managed mgd;
971 		struct ieee80211_if_ibss ibss;
972 		struct ieee80211_if_mesh mesh;
973 		struct ieee80211_if_ocb ocb;
974 		struct ieee80211_if_mntr mntr;
975 		struct ieee80211_if_nan nan;
976 	} u;
977 
978 #ifdef CONFIG_MAC80211_DEBUGFS
979 	struct {
980 		struct dentry *subdir_stations;
981 		struct dentry *default_unicast_key;
982 		struct dentry *default_multicast_key;
983 		struct dentry *default_mgmt_key;
984 	} debugfs;
985 #endif
986 
987 	/* must be last, dynamically sized area in this! */
988 	struct ieee80211_vif vif;
989 };
990 
991 static inline
992 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
993 {
994 	return container_of(p, struct ieee80211_sub_if_data, vif);
995 }
996 
997 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
998 	__acquires(&sdata->wdev.mtx)
999 {
1000 	mutex_lock(&sdata->wdev.mtx);
1001 	__acquire(&sdata->wdev.mtx);
1002 }
1003 
1004 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
1005 	__releases(&sdata->wdev.mtx)
1006 {
1007 	mutex_unlock(&sdata->wdev.mtx);
1008 	__release(&sdata->wdev.mtx);
1009 }
1010 
1011 #define sdata_dereference(p, sdata) \
1012 	rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
1013 
1014 static inline void
1015 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
1016 {
1017 	lockdep_assert_held(&sdata->wdev.mtx);
1018 }
1019 
1020 static inline int
1021 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
1022 {
1023 	switch (chandef->width) {
1024 	case NL80211_CHAN_WIDTH_5:
1025 		return 2;
1026 	case NL80211_CHAN_WIDTH_10:
1027 		return 1;
1028 	default:
1029 		return 0;
1030 	}
1031 }
1032 
1033 static inline int
1034 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
1035 {
1036 	struct ieee80211_chanctx_conf *chanctx_conf;
1037 	int shift = 0;
1038 
1039 	rcu_read_lock();
1040 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
1041 	if (chanctx_conf)
1042 		shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1043 	rcu_read_unlock();
1044 
1045 	return shift;
1046 }
1047 
1048 enum {
1049 	IEEE80211_RX_MSG	= 1,
1050 	IEEE80211_TX_STATUS_MSG	= 2,
1051 };
1052 
1053 enum queue_stop_reason {
1054 	IEEE80211_QUEUE_STOP_REASON_DRIVER,
1055 	IEEE80211_QUEUE_STOP_REASON_PS,
1056 	IEEE80211_QUEUE_STOP_REASON_CSA,
1057 	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1058 	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1059 	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1060 	IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1061 	IEEE80211_QUEUE_STOP_REASON_FLUSH,
1062 	IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1063 	IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1064 
1065 	IEEE80211_QUEUE_STOP_REASONS,
1066 };
1067 
1068 #ifdef CONFIG_MAC80211_LEDS
1069 struct tpt_led_trigger {
1070 	char name[32];
1071 	const struct ieee80211_tpt_blink *blink_table;
1072 	unsigned int blink_table_len;
1073 	struct timer_list timer;
1074 	struct ieee80211_local *local;
1075 	unsigned long prev_traffic;
1076 	unsigned long tx_bytes, rx_bytes;
1077 	unsigned int active, want;
1078 	bool running;
1079 };
1080 #endif
1081 
1082 /**
1083  * mac80211 scan flags - currently active scan mode
1084  *
1085  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1086  *	well be on the operating channel
1087  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1088  *	determine if we are on the operating channel or not
1089  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1090  *	channel. This should not interrupt normal traffic.
1091  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1092  *	that the scan completed.
1093  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1094  *	a scan complete for an aborted scan.
1095  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1096  *	cancelled.
1097  */
1098 enum {
1099 	SCAN_SW_SCANNING,
1100 	SCAN_HW_SCANNING,
1101 	SCAN_ONCHANNEL_SCANNING,
1102 	SCAN_COMPLETED,
1103 	SCAN_ABORTED,
1104 	SCAN_HW_CANCELLED,
1105 };
1106 
1107 /**
1108  * enum mac80211_scan_state - scan state machine states
1109  *
1110  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1111  *	determines if we should keep on scanning or switch back to the
1112  *	operating channel
1113  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1114  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1115  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1116  *	send out data
1117  * @SCAN_RESUME: Resume the scan and scan the next channel
1118  * @SCAN_ABORT: Abort the scan and go back to operating channel
1119  */
1120 enum mac80211_scan_state {
1121 	SCAN_DECISION,
1122 	SCAN_SET_CHANNEL,
1123 	SCAN_SEND_PROBE,
1124 	SCAN_SUSPEND,
1125 	SCAN_RESUME,
1126 	SCAN_ABORT,
1127 };
1128 
1129 struct ieee80211_local {
1130 	/* embed the driver visible part.
1131 	 * don't cast (use the static inlines below), but we keep
1132 	 * it first anyway so they become a no-op */
1133 	struct ieee80211_hw hw;
1134 
1135 	struct fq fq;
1136 	struct codel_vars *cvars;
1137 	struct codel_params cparams;
1138 
1139 	/* protects active_txqs and txqi->schedule_order */
1140 	spinlock_t active_txq_lock[IEEE80211_NUM_ACS];
1141 	struct list_head active_txqs[IEEE80211_NUM_ACS];
1142 	u16 schedule_round[IEEE80211_NUM_ACS];
1143 
1144 	u16 airtime_flags;
1145 
1146 	const struct ieee80211_ops *ops;
1147 
1148 	/*
1149 	 * private workqueue to mac80211. mac80211 makes this accessible
1150 	 * via ieee80211_queue_work()
1151 	 */
1152 	struct workqueue_struct *workqueue;
1153 
1154 	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1155 	int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1156 	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1157 	spinlock_t queue_stop_reason_lock;
1158 
1159 	int open_count;
1160 	int monitors, cooked_mntrs;
1161 	/* number of interfaces with corresponding FIF_ flags */
1162 	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1163 	    fif_probe_req;
1164 	int probe_req_reg;
1165 	unsigned int filter_flags; /* FIF_* */
1166 
1167 	bool wiphy_ciphers_allocated;
1168 
1169 	bool use_chanctx;
1170 
1171 	/* protects the aggregated multicast list and filter calls */
1172 	spinlock_t filter_lock;
1173 
1174 	/* used for uploading changed mc list */
1175 	struct work_struct reconfig_filter;
1176 
1177 	/* aggregated multicast list */
1178 	struct netdev_hw_addr_list mc_list;
1179 
1180 	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1181 
1182 	/*
1183 	 * suspended is true if we finished all the suspend _and_ we have
1184 	 * not yet come up from resume. This is to be used by mac80211
1185 	 * to ensure driver sanity during suspend and mac80211's own
1186 	 * sanity. It can eventually be used for WoW as well.
1187 	 */
1188 	bool suspended;
1189 
1190 	/*
1191 	 * Resuming is true while suspended, but when we're reprogramming the
1192 	 * hardware -- at that time it's allowed to use ieee80211_queue_work()
1193 	 * again even though some other parts of the stack are still suspended
1194 	 * and we still drop received frames to avoid waking the stack.
1195 	 */
1196 	bool resuming;
1197 
1198 	/*
1199 	 * quiescing is true during the suspend process _only_ to
1200 	 * ease timer cancelling etc.
1201 	 */
1202 	bool quiescing;
1203 
1204 	/* device is started */
1205 	bool started;
1206 
1207 	/* device is during a HW reconfig */
1208 	bool in_reconfig;
1209 
1210 	/* wowlan is enabled -- don't reconfig on resume */
1211 	bool wowlan;
1212 
1213 	struct work_struct radar_detected_work;
1214 
1215 	/* number of RX chains the hardware has */
1216 	u8 rx_chains;
1217 
1218 	/* bitmap of which sbands were copied */
1219 	u8 sband_allocated;
1220 
1221 	int tx_headroom; /* required headroom for hardware/radiotap */
1222 
1223 	/* Tasklet and skb queue to process calls from IRQ mode. All frames
1224 	 * added to skb_queue will be processed, but frames in
1225 	 * skb_queue_unreliable may be dropped if the total length of these
1226 	 * queues increases over the limit. */
1227 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1228 	struct tasklet_struct tasklet;
1229 	struct sk_buff_head skb_queue;
1230 	struct sk_buff_head skb_queue_unreliable;
1231 
1232 	spinlock_t rx_path_lock;
1233 
1234 	/* Station data */
1235 	/*
1236 	 * The mutex only protects the list, hash table and
1237 	 * counter, reads are done with RCU.
1238 	 */
1239 	struct mutex sta_mtx;
1240 	spinlock_t tim_lock;
1241 	unsigned long num_sta;
1242 	struct list_head sta_list;
1243 	struct rhltable sta_hash;
1244 	struct timer_list sta_cleanup;
1245 	int sta_generation;
1246 
1247 	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1248 	struct tasklet_struct tx_pending_tasklet;
1249 	struct tasklet_struct wake_txqs_tasklet;
1250 
1251 	atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1252 
1253 	/* number of interfaces with allmulti RX */
1254 	atomic_t iff_allmultis;
1255 
1256 	struct rate_control_ref *rate_ctrl;
1257 
1258 	struct arc4_ctx wep_tx_ctx;
1259 	struct arc4_ctx wep_rx_ctx;
1260 	u32 wep_iv;
1261 
1262 	/* see iface.c */
1263 	struct list_head interfaces;
1264 	struct list_head mon_list; /* only that are IFF_UP && !cooked */
1265 	struct mutex iflist_mtx;
1266 
1267 	/*
1268 	 * Key mutex, protects sdata's key_list and sta_info's
1269 	 * key pointers and ptk_idx (write access, they're RCU.)
1270 	 */
1271 	struct mutex key_mtx;
1272 
1273 	/* mutex for scan and work locking */
1274 	struct mutex mtx;
1275 
1276 	/* Scanning and BSS list */
1277 	unsigned long scanning;
1278 	struct cfg80211_ssid scan_ssid;
1279 	struct cfg80211_scan_request *int_scan_req;
1280 	struct cfg80211_scan_request __rcu *scan_req;
1281 	struct ieee80211_scan_request *hw_scan_req;
1282 	struct cfg80211_chan_def scan_chandef;
1283 	enum nl80211_band hw_scan_band;
1284 	int scan_channel_idx;
1285 	int scan_ies_len;
1286 	int hw_scan_ies_bufsize;
1287 	struct cfg80211_scan_info scan_info;
1288 
1289 	struct work_struct sched_scan_stopped_work;
1290 	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1291 	struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1292 	u8 scan_addr[ETH_ALEN];
1293 
1294 	unsigned long leave_oper_channel_time;
1295 	enum mac80211_scan_state next_scan_state;
1296 	struct delayed_work scan_work;
1297 	struct ieee80211_sub_if_data __rcu *scan_sdata;
1298 	/* For backward compatibility only -- do not use */
1299 	struct cfg80211_chan_def _oper_chandef;
1300 
1301 	/* Temporary remain-on-channel for off-channel operations */
1302 	struct ieee80211_channel *tmp_channel;
1303 
1304 	/* channel contexts */
1305 	struct list_head chanctx_list;
1306 	struct mutex chanctx_mtx;
1307 
1308 #ifdef CONFIG_MAC80211_LEDS
1309 	struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1310 	struct led_trigger tpt_led;
1311 	atomic_t tx_led_active, rx_led_active, assoc_led_active;
1312 	atomic_t radio_led_active, tpt_led_active;
1313 	struct tpt_led_trigger *tpt_led_trigger;
1314 #endif
1315 
1316 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1317 	/* SNMP counters */
1318 	/* dot11CountersTable */
1319 	u32 dot11TransmittedFragmentCount;
1320 	u32 dot11MulticastTransmittedFrameCount;
1321 	u32 dot11FailedCount;
1322 	u32 dot11RetryCount;
1323 	u32 dot11MultipleRetryCount;
1324 	u32 dot11FrameDuplicateCount;
1325 	u32 dot11ReceivedFragmentCount;
1326 	u32 dot11MulticastReceivedFrameCount;
1327 	u32 dot11TransmittedFrameCount;
1328 
1329 	/* TX/RX handler statistics */
1330 	unsigned int tx_handlers_drop;
1331 	unsigned int tx_handlers_queued;
1332 	unsigned int tx_handlers_drop_wep;
1333 	unsigned int tx_handlers_drop_not_assoc;
1334 	unsigned int tx_handlers_drop_unauth_port;
1335 	unsigned int rx_handlers_drop;
1336 	unsigned int rx_handlers_queued;
1337 	unsigned int rx_handlers_drop_nullfunc;
1338 	unsigned int rx_handlers_drop_defrag;
1339 	unsigned int tx_expand_skb_head;
1340 	unsigned int tx_expand_skb_head_cloned;
1341 	unsigned int rx_expand_skb_head_defrag;
1342 	unsigned int rx_handlers_fragments;
1343 	unsigned int tx_status_drop;
1344 #define I802_DEBUG_INC(c) (c)++
1345 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1346 #define I802_DEBUG_INC(c) do { } while (0)
1347 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1348 
1349 
1350 	int total_ps_buffered; /* total number of all buffered unicast and
1351 				* multicast packets for power saving stations
1352 				*/
1353 
1354 	bool pspolling;
1355 	bool offchannel_ps_enabled;
1356 	/*
1357 	 * PS can only be enabled when we have exactly one managed
1358 	 * interface (and monitors) in PS, this then points there.
1359 	 */
1360 	struct ieee80211_sub_if_data *ps_sdata;
1361 	struct work_struct dynamic_ps_enable_work;
1362 	struct work_struct dynamic_ps_disable_work;
1363 	struct timer_list dynamic_ps_timer;
1364 	struct notifier_block ifa_notifier;
1365 	struct notifier_block ifa6_notifier;
1366 
1367 	/*
1368 	 * The dynamic ps timeout configured from user space via WEXT -
1369 	 * this will override whatever chosen by mac80211 internally.
1370 	 */
1371 	int dynamic_ps_forced_timeout;
1372 
1373 	int user_power_level; /* in dBm, for all interfaces */
1374 
1375 	enum ieee80211_smps_mode smps_mode;
1376 
1377 	struct work_struct restart_work;
1378 
1379 #ifdef CONFIG_MAC80211_DEBUGFS
1380 	struct local_debugfsdentries {
1381 		struct dentry *rcdir;
1382 		struct dentry *keys;
1383 	} debugfs;
1384 	bool force_tx_status;
1385 #endif
1386 
1387 	/*
1388 	 * Remain-on-channel support
1389 	 */
1390 	struct delayed_work roc_work;
1391 	struct list_head roc_list;
1392 	struct work_struct hw_roc_start, hw_roc_done;
1393 	unsigned long hw_roc_start_time;
1394 	u64 roc_cookie_counter;
1395 
1396 	struct idr ack_status_frames;
1397 	spinlock_t ack_status_lock;
1398 
1399 	struct ieee80211_sub_if_data __rcu *p2p_sdata;
1400 
1401 	/* virtual monitor interface */
1402 	struct ieee80211_sub_if_data __rcu *monitor_sdata;
1403 	struct cfg80211_chan_def monitor_chandef;
1404 
1405 	/* extended capabilities provided by mac80211 */
1406 	u8 ext_capa[8];
1407 
1408 	/* TDLS channel switch */
1409 	struct work_struct tdls_chsw_work;
1410 	struct sk_buff_head skb_queue_tdls_chsw;
1411 };
1412 
1413 static inline struct ieee80211_sub_if_data *
1414 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1415 {
1416 	return netdev_priv(dev);
1417 }
1418 
1419 static inline struct ieee80211_sub_if_data *
1420 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1421 {
1422 	return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1423 }
1424 
1425 static inline struct ieee80211_supported_band *
1426 ieee80211_get_sband(struct ieee80211_sub_if_data *sdata)
1427 {
1428 	struct ieee80211_local *local = sdata->local;
1429 	struct ieee80211_chanctx_conf *chanctx_conf;
1430 	enum nl80211_band band;
1431 
1432 	rcu_read_lock();
1433 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1434 
1435 	if (WARN_ON_ONCE(!chanctx_conf)) {
1436 		rcu_read_unlock();
1437 		return NULL;
1438 	}
1439 
1440 	band = chanctx_conf->def.chan->band;
1441 	rcu_read_unlock();
1442 
1443 	return local->hw.wiphy->bands[band];
1444 }
1445 
1446 /* this struct holds the value parsing from channel switch IE  */
1447 struct ieee80211_csa_ie {
1448 	struct cfg80211_chan_def chandef;
1449 	u8 mode;
1450 	u8 count;
1451 	u8 ttl;
1452 	u16 pre_value;
1453 	u16 reason_code;
1454 	u32 max_switch_time;
1455 };
1456 
1457 /* Parsed Information Elements */
1458 struct ieee802_11_elems {
1459 	const u8 *ie_start;
1460 	size_t total_len;
1461 
1462 	/* pointers to IEs */
1463 	const struct ieee80211_tdls_lnkie *lnk_id;
1464 	const struct ieee80211_ch_switch_timing *ch_sw_timing;
1465 	const u8 *ext_capab;
1466 	const u8 *ssid;
1467 	const u8 *supp_rates;
1468 	const u8 *ds_params;
1469 	const struct ieee80211_tim_ie *tim;
1470 	const u8 *challenge;
1471 	const u8 *rsn;
1472 	const u8 *erp_info;
1473 	const u8 *ext_supp_rates;
1474 	const u8 *wmm_info;
1475 	const u8 *wmm_param;
1476 	const struct ieee80211_ht_cap *ht_cap_elem;
1477 	const struct ieee80211_ht_operation *ht_operation;
1478 	const struct ieee80211_vht_cap *vht_cap_elem;
1479 	const struct ieee80211_vht_operation *vht_operation;
1480 	const struct ieee80211_meshconf_ie *mesh_config;
1481 	const u8 *he_cap;
1482 	const struct ieee80211_he_operation *he_operation;
1483 	const struct ieee80211_he_spr *he_spr;
1484 	const struct ieee80211_mu_edca_param_set *mu_edca_param_set;
1485 	const u8 *uora_element;
1486 	const u8 *mesh_id;
1487 	const u8 *peering;
1488 	const __le16 *awake_window;
1489 	const u8 *preq;
1490 	const u8 *prep;
1491 	const u8 *perr;
1492 	const struct ieee80211_rann_ie *rann;
1493 	const struct ieee80211_channel_sw_ie *ch_switch_ie;
1494 	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1495 	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1496 	const u8 *max_channel_switch_time;
1497 	const u8 *country_elem;
1498 	const u8 *pwr_constr_elem;
1499 	const u8 *cisco_dtpc_elem;
1500 	const struct ieee80211_timeout_interval_ie *timeout_int;
1501 	const u8 *opmode_notif;
1502 	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1503 	struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1504 	const struct ieee80211_bss_max_idle_period_ie *max_idle_period_ie;
1505 	const struct ieee80211_multiple_bssid_configuration *mbssid_config_ie;
1506 	const struct ieee80211_bssid_index *bssid_index;
1507 	u8 max_bssid_indicator;
1508 	u8 dtim_count;
1509 	u8 dtim_period;
1510 	const struct ieee80211_addba_ext_ie *addba_ext_ie;
1511 
1512 	/* length of them, respectively */
1513 	u8 ext_capab_len;
1514 	u8 ssid_len;
1515 	u8 supp_rates_len;
1516 	u8 tim_len;
1517 	u8 challenge_len;
1518 	u8 rsn_len;
1519 	u8 ext_supp_rates_len;
1520 	u8 wmm_info_len;
1521 	u8 wmm_param_len;
1522 	u8 he_cap_len;
1523 	u8 mesh_id_len;
1524 	u8 peering_len;
1525 	u8 preq_len;
1526 	u8 prep_len;
1527 	u8 perr_len;
1528 	u8 country_elem_len;
1529 	u8 bssid_index_len;
1530 
1531 	/* whether a parse error occurred while retrieving these elements */
1532 	bool parse_error;
1533 };
1534 
1535 static inline struct ieee80211_local *hw_to_local(
1536 	struct ieee80211_hw *hw)
1537 {
1538 	return container_of(hw, struct ieee80211_local, hw);
1539 }
1540 
1541 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1542 {
1543 	return container_of(txq, struct txq_info, txq);
1544 }
1545 
1546 static inline bool txq_has_queue(struct ieee80211_txq *txq)
1547 {
1548 	struct txq_info *txqi = to_txq_info(txq);
1549 
1550 	return !(skb_queue_empty(&txqi->frags) && !txqi->tin.backlog_packets);
1551 }
1552 
1553 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1554 {
1555 	return ether_addr_equal(raddr, addr) ||
1556 	       is_broadcast_ether_addr(raddr);
1557 }
1558 
1559 static inline bool
1560 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1561 {
1562 	WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1563 		     status->flag & RX_FLAG_MACTIME_END);
1564 	if (status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END))
1565 		return true;
1566 	/* can't handle non-legacy preamble yet */
1567 	if (status->flag & RX_FLAG_MACTIME_PLCP_START &&
1568 	    status->encoding == RX_ENC_LEGACY)
1569 		return true;
1570 	return false;
1571 }
1572 
1573 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata);
1574 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata);
1575 
1576 /* This function returns the number of multicast stations connected to this
1577  * interface. It returns -1 if that number is not tracked, that is for netdevs
1578  * not in AP or AP_VLAN mode or when using 4addr.
1579  */
1580 static inline int
1581 ieee80211_vif_get_num_mcast_if(struct ieee80211_sub_if_data *sdata)
1582 {
1583 	if (sdata->vif.type == NL80211_IFTYPE_AP)
1584 		return atomic_read(&sdata->u.ap.num_mcast_sta);
1585 	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
1586 		return atomic_read(&sdata->u.vlan.num_mcast_sta);
1587 	return -1;
1588 }
1589 
1590 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1591 				     struct ieee80211_rx_status *status,
1592 				     unsigned int mpdu_len,
1593 				     unsigned int mpdu_offset);
1594 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1595 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1596 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1597 				      u32 changed);
1598 void ieee80211_configure_filter(struct ieee80211_local *local);
1599 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1600 
1601 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local);
1602 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
1603 			     u64 *cookie, gfp_t gfp);
1604 
1605 void ieee80211_check_fast_rx(struct sta_info *sta);
1606 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1607 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1608 void ieee80211_clear_fast_rx(struct sta_info *sta);
1609 
1610 /* STA code */
1611 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1612 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1613 		       struct cfg80211_auth_request *req);
1614 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1615 			struct cfg80211_assoc_request *req);
1616 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1617 			 struct cfg80211_deauth_request *req);
1618 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1619 			   struct cfg80211_disassoc_request *req);
1620 void ieee80211_send_pspoll(struct ieee80211_local *local,
1621 			   struct ieee80211_sub_if_data *sdata);
1622 void ieee80211_recalc_ps(struct ieee80211_local *local);
1623 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1624 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1625 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1626 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1627 				  struct sk_buff *skb);
1628 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1629 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1630 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1631 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1632 				  __le16 fc, bool acked);
1633 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1634 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1635 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1636 
1637 /* IBSS code */
1638 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1639 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1640 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1641 			      const u8 *bssid, const u8 *addr, u32 supp_rates);
1642 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1643 			struct cfg80211_ibss_params *params);
1644 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1645 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1646 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1647 				   struct sk_buff *skb);
1648 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1649 			      struct cfg80211_csa_settings *csa_settings);
1650 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1651 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1652 
1653 /* OCB code */
1654 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1655 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1656 			     const u8 *bssid, const u8 *addr, u32 supp_rates);
1657 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1658 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1659 		       struct ocb_setup *setup);
1660 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1661 
1662 /* mesh code */
1663 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1664 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1665 				   struct sk_buff *skb);
1666 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1667 			      struct cfg80211_csa_settings *csa_settings);
1668 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1669 
1670 /* scan/BSS handling */
1671 void ieee80211_scan_work(struct work_struct *work);
1672 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1673 				const u8 *ssid, u8 ssid_len,
1674 				struct ieee80211_channel **channels,
1675 				unsigned int n_channels,
1676 				enum nl80211_bss_scan_width scan_width);
1677 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1678 			   struct cfg80211_scan_request *req);
1679 void ieee80211_scan_cancel(struct ieee80211_local *local);
1680 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1681 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1682 
1683 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1684 struct ieee80211_bss *
1685 ieee80211_bss_info_update(struct ieee80211_local *local,
1686 			  struct ieee80211_rx_status *rx_status,
1687 			  struct ieee80211_mgmt *mgmt,
1688 			  size_t len,
1689 			  struct ieee80211_channel *channel);
1690 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1691 			  struct ieee80211_bss *bss);
1692 
1693 /* scheduled scan handling */
1694 int
1695 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1696 				     struct cfg80211_sched_scan_request *req);
1697 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1698 				       struct cfg80211_sched_scan_request *req);
1699 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
1700 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1701 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1702 
1703 /* off-channel/mgmt-tx */
1704 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1705 void ieee80211_offchannel_return(struct ieee80211_local *local);
1706 void ieee80211_roc_setup(struct ieee80211_local *local);
1707 void ieee80211_start_next_roc(struct ieee80211_local *local);
1708 void ieee80211_roc_purge(struct ieee80211_local *local,
1709 			 struct ieee80211_sub_if_data *sdata);
1710 int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
1711 				struct ieee80211_channel *chan,
1712 				unsigned int duration, u64 *cookie);
1713 int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
1714 				       struct wireless_dev *wdev, u64 cookie);
1715 int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
1716 		      struct cfg80211_mgmt_tx_params *params, u64 *cookie);
1717 int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
1718 				  struct wireless_dev *wdev, u64 cookie);
1719 
1720 /* channel switch handling */
1721 void ieee80211_csa_finalize_work(struct work_struct *work);
1722 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1723 			     struct cfg80211_csa_settings *params);
1724 
1725 /* interface handling */
1726 int ieee80211_iface_init(void);
1727 void ieee80211_iface_exit(void);
1728 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1729 		     unsigned char name_assign_type,
1730 		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
1731 		     struct vif_params *params);
1732 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1733 			     enum nl80211_iftype type);
1734 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1735 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1736 u32 ieee80211_idle_off(struct ieee80211_local *local);
1737 void ieee80211_recalc_idle(struct ieee80211_local *local);
1738 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1739 				    const int offset);
1740 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1741 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1742 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1743 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1744 
1745 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1746 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1747 			      bool update_bss);
1748 
1749 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1750 {
1751 	return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1752 }
1753 
1754 /* tx handling */
1755 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1756 void ieee80211_tx_pending(unsigned long data);
1757 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1758 					 struct net_device *dev);
1759 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1760 				       struct net_device *dev);
1761 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1762 				  struct net_device *dev,
1763 				  u32 info_flags,
1764 				  u32 ctrl_flags);
1765 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1766 			      struct sk_buff_head *skbs);
1767 struct sk_buff *
1768 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1769 			      struct sk_buff *skb, u32 info_flags);
1770 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
1771 			  struct ieee80211_supported_band *sband,
1772 			  int retry_count, int shift, bool send_to_cooked,
1773 			  struct ieee80211_tx_status *status);
1774 
1775 void ieee80211_check_fast_xmit(struct sta_info *sta);
1776 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
1777 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
1778 void ieee80211_clear_fast_xmit(struct sta_info *sta);
1779 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
1780 			      const u8 *buf, size_t len,
1781 			      const u8 *dest, __be16 proto, bool unencrypted);
1782 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
1783 			      const u8 *buf, size_t len);
1784 
1785 /* HT */
1786 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1787 				     struct ieee80211_sta_ht_cap *ht_cap);
1788 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1789 				       struct ieee80211_supported_band *sband,
1790 				       const struct ieee80211_ht_cap *ht_cap_ie,
1791 				       struct sta_info *sta);
1792 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1793 			  const u8 *da, u16 tid,
1794 			  u16 initiator, u16 reason_code);
1795 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1796 			       enum ieee80211_smps_mode smps, const u8 *da,
1797 			       const u8 *bssid);
1798 void ieee80211_request_smps_ap_work(struct work_struct *work);
1799 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1800 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1801 				   enum ieee80211_smps_mode smps_mode_new);
1802 
1803 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1804 				     u16 initiator, u16 reason, bool stop);
1805 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1806 				    u16 initiator, u16 reason, bool stop);
1807 void ___ieee80211_start_rx_ba_session(struct sta_info *sta,
1808 				      u8 dialog_token, u16 timeout,
1809 				      u16 start_seq_num, u16 ba_policy, u16 tid,
1810 				      u16 buf_size, bool tx, bool auto_seq,
1811 				      const struct ieee80211_addba_ext_ie *addbaext);
1812 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1813 					 enum ieee80211_agg_stop_reason reason);
1814 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1815 			     struct sta_info *sta,
1816 			     struct ieee80211_mgmt *mgmt, size_t len);
1817 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1818 				  struct sta_info *sta,
1819 				  struct ieee80211_mgmt *mgmt,
1820 				  size_t len);
1821 void ieee80211_process_addba_request(struct ieee80211_local *local,
1822 				     struct sta_info *sta,
1823 				     struct ieee80211_mgmt *mgmt,
1824 				     size_t len);
1825 
1826 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1827 				   enum ieee80211_agg_stop_reason reason);
1828 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1829 				    enum ieee80211_agg_stop_reason reason);
1830 void ieee80211_start_tx_ba_cb(struct sta_info *sta, int tid,
1831 			      struct tid_ampdu_tx *tid_tx);
1832 void ieee80211_stop_tx_ba_cb(struct sta_info *sta, int tid,
1833 			     struct tid_ampdu_tx *tid_tx);
1834 void ieee80211_ba_session_work(struct work_struct *work);
1835 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1836 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1837 
1838 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1839 enum nl80211_smps_mode
1840 ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps);
1841 
1842 /* VHT */
1843 void
1844 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1845 				    struct ieee80211_supported_band *sband,
1846 				    const struct ieee80211_vht_cap *vht_cap_ie,
1847 				    struct sta_info *sta);
1848 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1849 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1850 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1851 enum ieee80211_sta_rx_bandwidth
1852 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
1853 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta);
1854 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1855 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
1856 				 struct ieee80211_mgmt *mgmt);
1857 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1858                                   struct sta_info *sta, u8 opmode,
1859 				  enum nl80211_band band);
1860 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1861 				 struct sta_info *sta, u8 opmode,
1862 				 enum nl80211_band band);
1863 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1864 				      struct ieee80211_sta_vht_cap *vht_cap);
1865 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
1866 				     u16 vht_mask[NL80211_VHT_NSS_MAX]);
1867 enum nl80211_chan_width
1868 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta);
1869 
1870 /* HE */
1871 void
1872 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
1873 				  struct ieee80211_supported_band *sband,
1874 				  const u8 *he_cap_ie, u8 he_cap_len,
1875 				  struct sta_info *sta);
1876 void
1877 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
1878 				const struct ieee80211_he_spr *he_spr_ie_elem);
1879 
1880 void
1881 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
1882 			const struct ieee80211_he_operation *he_op_ie_elem);
1883 
1884 /* Spectrum management */
1885 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1886 				       struct ieee80211_mgmt *mgmt,
1887 				       size_t len);
1888 /**
1889  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1890  * @sdata: the sdata of the interface which has received the frame
1891  * @elems: parsed 802.11 elements received with the frame
1892  * @current_band: indicates the current band
1893  * @sta_flags: contains information about own capabilities and restrictions
1894  *	to decide which channel switch announcements can be accepted. Only the
1895  *	following subset of &enum ieee80211_sta_flags are evaluated:
1896  *	%IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1897  *	%IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1898  *	%IEEE80211_STA_DISABLE_160MHZ.
1899  * @bssid: the currently connected bssid (for reporting)
1900  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1901 	All of them will be filled with if success only.
1902  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1903  */
1904 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1905 				 struct ieee802_11_elems *elems,
1906 				 enum nl80211_band current_band,
1907 				 u32 sta_flags, u8 *bssid,
1908 				 struct ieee80211_csa_ie *csa_ie);
1909 
1910 /* Suspend/resume and hw reconfiguration */
1911 int ieee80211_reconfig(struct ieee80211_local *local);
1912 void ieee80211_stop_device(struct ieee80211_local *local);
1913 
1914 int __ieee80211_suspend(struct ieee80211_hw *hw,
1915 			struct cfg80211_wowlan *wowlan);
1916 
1917 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1918 {
1919 	struct ieee80211_local *local = hw_to_local(hw);
1920 
1921 	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1922 	     !test_bit(SCAN_COMPLETED, &local->scanning),
1923 		"%s: resume with hardware scan still in progress\n",
1924 		wiphy_name(hw->wiphy));
1925 
1926 	return ieee80211_reconfig(hw_to_local(hw));
1927 }
1928 
1929 /* utility functions/constants */
1930 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1931 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
1932 			     int rate, int erp, int short_preamble,
1933 			     int shift);
1934 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1935 					   struct ieee80211_tx_queue_params *qparam,
1936 					   int ac);
1937 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1938 			       bool bss_notify, bool enable_qos);
1939 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1940 		    struct sta_info *sta, struct sk_buff *skb,
1941 		    u32 txdata_flags);
1942 
1943 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1944 				 struct sk_buff *skb, int tid,
1945 				 enum nl80211_band band, u32 txdata_flags);
1946 
1947 static inline void
1948 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1949 			  struct sk_buff *skb, int tid,
1950 			  enum nl80211_band band, u32 txdata_flags)
1951 {
1952 	rcu_read_lock();
1953 	__ieee80211_tx_skb_tid_band(sdata, skb, tid, band, txdata_flags);
1954 	rcu_read_unlock();
1955 }
1956 
1957 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1958 					struct sk_buff *skb, int tid)
1959 {
1960 	struct ieee80211_chanctx_conf *chanctx_conf;
1961 
1962 	rcu_read_lock();
1963 	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1964 	if (WARN_ON(!chanctx_conf)) {
1965 		rcu_read_unlock();
1966 		kfree_skb(skb);
1967 		return;
1968 	}
1969 
1970 	__ieee80211_tx_skb_tid_band(sdata, skb, tid,
1971 				    chanctx_conf->def.chan->band, 0);
1972 	rcu_read_unlock();
1973 }
1974 
1975 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1976 				    struct sk_buff *skb)
1977 {
1978 	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1979 	ieee80211_tx_skb_tid(sdata, skb, 7);
1980 }
1981 
1982 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1983 			       struct ieee802_11_elems *elems,
1984 			       u64 filter, u32 crc, u8 *transmitter_bssid,
1985 			       u8 *bss_bssid);
1986 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1987 					  bool action,
1988 					  struct ieee802_11_elems *elems,
1989 					  u8 *transmitter_bssid,
1990 					  u8 *bss_bssid)
1991 {
1992 	ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0,
1993 				   transmitter_bssid, bss_bssid);
1994 }
1995 
1996 
1997 extern const int ieee802_1d_to_ac[8];
1998 
1999 static inline int ieee80211_ac_from_tid(int tid)
2000 {
2001 	return ieee802_1d_to_ac[tid & 7];
2002 }
2003 
2004 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
2005 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
2006 void ieee80211_dynamic_ps_timer(struct timer_list *t);
2007 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2008 			     struct ieee80211_sub_if_data *sdata,
2009 			     bool powersave);
2010 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
2011 			     struct ieee80211_hdr *hdr);
2012 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2013 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
2014 
2015 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
2016 				     unsigned long queues,
2017 				     enum queue_stop_reason reason,
2018 				     bool refcounted);
2019 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
2020 			       struct ieee80211_sub_if_data *sdata,
2021 			       enum queue_stop_reason reason);
2022 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
2023 			       struct ieee80211_sub_if_data *sdata,
2024 			       enum queue_stop_reason reason);
2025 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
2026 				     unsigned long queues,
2027 				     enum queue_stop_reason reason,
2028 				     bool refcounted);
2029 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
2030 				    enum queue_stop_reason reason,
2031 				    bool refcounted);
2032 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
2033 				    enum queue_stop_reason reason,
2034 				    bool refcounted);
2035 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
2036 void ieee80211_add_pending_skb(struct ieee80211_local *local,
2037 			       struct sk_buff *skb);
2038 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
2039 				struct sk_buff_head *skbs);
2040 void ieee80211_flush_queues(struct ieee80211_local *local,
2041 			    struct ieee80211_sub_if_data *sdata, bool drop);
2042 void __ieee80211_flush_queues(struct ieee80211_local *local,
2043 			      struct ieee80211_sub_if_data *sdata,
2044 			      unsigned int queues, bool drop);
2045 
2046 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
2047 {
2048 	/*
2049 	 * It's unsafe to try to do any work during reconfigure flow.
2050 	 * When the flow ends the work will be requeued.
2051 	 */
2052 	if (local->in_reconfig)
2053 		return false;
2054 
2055 	/*
2056 	 * If quiescing is set, we are racing with __ieee80211_suspend.
2057 	 * __ieee80211_suspend flushes the workers after setting quiescing,
2058 	 * and we check quiescing / suspended before enqueing new workers.
2059 	 * We should abort the worker to avoid the races below.
2060 	 */
2061 	if (local->quiescing)
2062 		return false;
2063 
2064 	/*
2065 	 * We might already be suspended if the following scenario occurs:
2066 	 * __ieee80211_suspend		Control path
2067 	 *
2068 	 *				if (local->quiescing)
2069 	 *					return;
2070 	 * local->quiescing = true;
2071 	 * flush_workqueue();
2072 	 *				queue_work(...);
2073 	 * local->suspended = true;
2074 	 * local->quiescing = false;
2075 	 *				worker starts running...
2076 	 */
2077 	if (local->suspended)
2078 		return false;
2079 
2080 	return true;
2081 }
2082 
2083 int ieee80211_txq_setup_flows(struct ieee80211_local *local);
2084 void ieee80211_txq_set_params(struct ieee80211_local *local);
2085 void ieee80211_txq_teardown_flows(struct ieee80211_local *local);
2086 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
2087 			struct sta_info *sta,
2088 			struct txq_info *txq, int tid);
2089 void ieee80211_txq_purge(struct ieee80211_local *local,
2090 			 struct txq_info *txqi);
2091 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
2092 			       struct ieee80211_sub_if_data *sdata);
2093 void ieee80211_fill_txq_stats(struct cfg80211_txq_stats *txqstats,
2094 			      struct txq_info *txqi);
2095 void ieee80211_wake_txqs(unsigned long data);
2096 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
2097 			 u16 transaction, u16 auth_alg, u16 status,
2098 			 const u8 *extra, size_t extra_len, const u8 *bssid,
2099 			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
2100 			 u32 tx_flags);
2101 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
2102 				    const u8 *da, const u8 *bssid,
2103 				    u16 stype, u16 reason,
2104 				    bool send_frame, u8 *frame_buf);
2105 
2106 enum {
2107 	IEEE80211_PROBE_FLAG_DIRECTED		= BIT(0),
2108 	IEEE80211_PROBE_FLAG_MIN_CONTENT	= BIT(1),
2109 	IEEE80211_PROBE_FLAG_RANDOM_SN		= BIT(2),
2110 };
2111 
2112 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
2113 			     size_t buffer_len,
2114 			     struct ieee80211_scan_ies *ie_desc,
2115 			     const u8 *ie, size_t ie_len,
2116 			     u8 bands_used, u32 *rate_masks,
2117 			     struct cfg80211_chan_def *chandef,
2118 			     u32 flags);
2119 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2120 					  const u8 *src, const u8 *dst,
2121 					  u32 ratemask,
2122 					  struct ieee80211_channel *chan,
2123 					  const u8 *ssid, size_t ssid_len,
2124 					  const u8 *ie, size_t ie_len,
2125 					  u32 flags);
2126 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2127 			    struct ieee802_11_elems *elems,
2128 			    enum nl80211_band band, u32 *basic_rates);
2129 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2130 				 enum ieee80211_smps_mode smps_mode);
2131 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2132 				enum ieee80211_smps_mode smps_mode);
2133 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
2134 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
2135 
2136 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
2137 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2138 			      u16 cap);
2139 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2140 			       const struct cfg80211_chan_def *chandef,
2141 			       u16 prot_mode, bool rifs_mode);
2142 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2143 				   const struct cfg80211_chan_def *chandef);
2144 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2145 			       u32 cap);
2146 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2147 				const struct cfg80211_chan_def *chandef);
2148 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
2149 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2150 			      const struct ieee80211_sta_he_cap *he_cap,
2151 			      u8 *end);
2152 u8 *ieee80211_ie_build_he_oper(u8 *pos);
2153 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2154 			     const struct ieee80211_supported_band *sband,
2155 			     const u8 *srates, int srates_len, u32 *rates);
2156 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2157 			    struct sk_buff *skb, bool need_basic,
2158 			    enum nl80211_band band);
2159 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2160 				struct sk_buff *skb, bool need_basic,
2161 				enum nl80211_band band);
2162 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
2163 
2164 /* channel management */
2165 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2166 			       struct cfg80211_chan_def *chandef);
2167 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2168 				const struct ieee80211_vht_operation *oper,
2169 				const struct ieee80211_ht_operation *htop,
2170 				struct cfg80211_chan_def *chandef);
2171 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
2172 
2173 int __must_check
2174 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
2175 			  const struct cfg80211_chan_def *chandef,
2176 			  enum ieee80211_chanctx_mode mode);
2177 int __must_check
2178 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
2179 			      const struct cfg80211_chan_def *chandef,
2180 			      enum ieee80211_chanctx_mode mode,
2181 			      bool radar_required);
2182 int __must_check
2183 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2184 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2185 
2186 int __must_check
2187 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2188 			       const struct cfg80211_chan_def *chandef,
2189 			       u32 *changed);
2190 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2191 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2192 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2193 					 bool clear);
2194 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2195 			       struct ieee80211_chanctx *ctx);
2196 
2197 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2198 				   struct ieee80211_chanctx *chanctx);
2199 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2200 				      struct ieee80211_chanctx *ctx);
2201 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2202 
2203 void ieee80211_dfs_cac_timer(unsigned long data);
2204 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2205 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2206 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2207 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2208 			      struct cfg80211_csa_settings *csa_settings);
2209 
2210 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2211 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2212 const struct ieee80211_cipher_scheme *
2213 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2214 		 enum nl80211_iftype iftype);
2215 int ieee80211_cs_headroom(struct ieee80211_local *local,
2216 			  struct cfg80211_crypto_settings *crypto,
2217 			  enum nl80211_iftype iftype);
2218 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2219 			   struct ieee80211_sub_if_data *sdata);
2220 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2221 				 const struct cfg80211_chan_def *chandef,
2222 				 enum ieee80211_chanctx_mode chanmode,
2223 				 u8 radar_detect);
2224 int ieee80211_max_num_channels(struct ieee80211_local *local);
2225 enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta);
2226 void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
2227 				       struct ieee80211_chanctx *ctx);
2228 
2229 /* TDLS */
2230 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2231 			const u8 *peer, u8 action_code, u8 dialog_token,
2232 			u16 status_code, u32 peer_capability,
2233 			bool initiator, const u8 *extra_ies,
2234 			size_t extra_ies_len);
2235 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2236 			const u8 *peer, enum nl80211_tdls_operation oper);
2237 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2238 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2239 				  const u8 *addr, u8 oper_class,
2240 				  struct cfg80211_chan_def *chandef);
2241 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2242 					  struct net_device *dev,
2243 					  const u8 *addr);
2244 void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata);
2245 void ieee80211_tdls_chsw_work(struct work_struct *wk);
2246 void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
2247 				      const u8 *peer, u16 reason);
2248 const char *ieee80211_get_reason_code_string(u16 reason_code);
2249 
2250 extern const struct ethtool_ops ieee80211_ethtool_ops;
2251 
2252 #ifdef CONFIG_MAC80211_NOINLINE
2253 #define debug_noinline noinline
2254 #else
2255 #define debug_noinline
2256 #endif
2257 
2258 #endif /* IEEE80211_I_H */
2259