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) 2018-2021 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 <linux/rbtree.h>
29 #include <net/ieee80211_radiotap.h>
30 #include <net/cfg80211.h>
31 #include <net/mac80211.h>
32 #include <net/fq.h>
33 #include "key.h"
34 #include "sta_info.h"
35 #include "debug.h"
36 
37 extern const struct cfg80211_ops mac80211_config_ops;
38 
39 struct ieee80211_local;
40 
41 /* Maximum number of broadcast/multicast frames to buffer when some of the
42  * associated stations are using power saving. */
43 #define AP_MAX_BC_BUFFER 128
44 
45 /* Maximum number of frames buffered to all STAs, including multicast frames.
46  * Note: increasing this limit increases the potential memory requirement. Each
47  * frame can be up to about 2 kB long. */
48 #define TOTAL_MAX_TX_BUFFER 512
49 
50 /* Required encryption head and tailroom */
51 #define IEEE80211_ENCRYPT_HEADROOM 8
52 #define IEEE80211_ENCRYPT_TAILROOM 18
53 
54 /* power level hasn't been configured (or set to automatic) */
55 #define IEEE80211_UNSET_POWER_LEVEL	INT_MIN
56 
57 /*
58  * Some APs experience problems when working with U-APSD. Decreasing the
59  * probability of that happening by using legacy mode for all ACs but VO isn't
60  * enough.
61  *
62  * Cisco 4410N originally forced us to enable VO by default only because it
63  * treated non-VO ACs as legacy.
64  *
65  * However some APs (notably Netgear R7000) silently reclassify packets to
66  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
67  * clients would never see some frames (e.g. ARP responses) or would fetch them
68  * accidentally after a long time.
69  *
70  * It makes little sense to enable u-APSD queues by default because it needs
71  * userspace applications to be aware of it to actually take advantage of the
72  * possible additional powersavings. Implicitly depending on driver autotrigger
73  * frame support doesn't make much sense.
74  */
75 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
76 
77 #define IEEE80211_DEFAULT_MAX_SP_LEN		\
78 	IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
79 
80 extern const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS];
81 
82 #define IEEE80211_DEAUTH_FRAME_LEN	(24 /* hdr */ + 2 /* reason */)
83 
84 #define IEEE80211_MAX_NAN_INSTANCE_ID 255
85 
86 struct ieee80211_bss {
87 	u32 device_ts_beacon, device_ts_presp;
88 
89 	bool wmm_used;
90 	bool uapsd_supported;
91 
92 #define IEEE80211_MAX_SUPP_RATES 32
93 	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
94 	size_t supp_rates_len;
95 	struct ieee80211_rate *beacon_rate;
96 
97 	u32 vht_cap_info;
98 
99 	/*
100 	 * During association, we save an ERP value from a probe response so
101 	 * that we can feed ERP info to the driver when handling the
102 	 * association completes. these fields probably won't be up-to-date
103 	 * otherwise, you probably don't want to use them.
104 	 */
105 	bool has_erp_value;
106 	u8 erp_value;
107 
108 	/* Keep track of the corruption of the last beacon/probe response. */
109 	u8 corrupt_data;
110 
111 	/* Keep track of what bits of information we have valid info for. */
112 	u8 valid_data;
113 };
114 
115 /**
116  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
117  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
118  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
119  *
120  * These are bss flags that are attached to a bss in the
121  * @corrupt_data field of &struct ieee80211_bss.
122  */
123 enum ieee80211_bss_corrupt_data_flags {
124 	IEEE80211_BSS_CORRUPT_BEACON		= BIT(0),
125 	IEEE80211_BSS_CORRUPT_PROBE_RESP	= BIT(1)
126 };
127 
128 /**
129  * enum ieee80211_valid_data_flags - BSS valid data flags
130  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
131  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
132  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
133  *
134  * These are bss flags that are attached to a bss in the
135  * @valid_data field of &struct ieee80211_bss.  They show which parts
136  * of the data structure were received as a result of an un-corrupted
137  * beacon/probe response.
138  */
139 enum ieee80211_bss_valid_data_flags {
140 	IEEE80211_BSS_VALID_WMM			= BIT(1),
141 	IEEE80211_BSS_VALID_RATES		= BIT(2),
142 	IEEE80211_BSS_VALID_ERP			= BIT(3)
143 };
144 
145 typedef unsigned __bitwise ieee80211_tx_result;
146 #define TX_CONTINUE	((__force ieee80211_tx_result) 0u)
147 #define TX_DROP		((__force ieee80211_tx_result) 1u)
148 #define TX_QUEUED	((__force ieee80211_tx_result) 2u)
149 
150 #define IEEE80211_TX_UNICAST		BIT(1)
151 #define IEEE80211_TX_PS_BUFFERED	BIT(2)
152 
153 struct ieee80211_tx_data {
154 	struct sk_buff *skb;
155 	struct sk_buff_head skbs;
156 	struct ieee80211_local *local;
157 	struct ieee80211_sub_if_data *sdata;
158 	struct sta_info *sta;
159 	struct ieee80211_key *key;
160 	struct ieee80211_tx_rate rate;
161 
162 	unsigned int flags;
163 };
164 
165 
166 typedef unsigned __bitwise ieee80211_rx_result;
167 #define RX_CONTINUE		((__force ieee80211_rx_result) 0u)
168 #define RX_DROP_UNUSABLE	((__force ieee80211_rx_result) 1u)
169 #define RX_DROP_MONITOR		((__force ieee80211_rx_result) 2u)
170 #define RX_QUEUED		((__force ieee80211_rx_result) 3u)
171 
172 /**
173  * enum ieee80211_packet_rx_flags - packet RX flags
174  * @IEEE80211_RX_AMSDU: a-MSDU packet
175  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
176  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
177  *
178  * These are per-frame flags that are attached to a frame in the
179  * @rx_flags field of &struct ieee80211_rx_status.
180  */
181 enum ieee80211_packet_rx_flags {
182 	IEEE80211_RX_AMSDU			= BIT(3),
183 	IEEE80211_RX_MALFORMED_ACTION_FRM	= BIT(4),
184 	IEEE80211_RX_DEFERRED_RELEASE		= BIT(5),
185 };
186 
187 /**
188  * enum ieee80211_rx_flags - RX data flags
189  *
190  * @IEEE80211_RX_CMNTR: received on cooked monitor already
191  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
192  *	to cfg80211_report_obss_beacon().
193  *
194  * These flags are used across handling multiple interfaces
195  * for a single frame.
196  */
197 enum ieee80211_rx_flags {
198 	IEEE80211_RX_CMNTR		= BIT(0),
199 	IEEE80211_RX_BEACON_REPORTED	= BIT(1),
200 };
201 
202 struct ieee80211_rx_data {
203 	struct list_head *list;
204 	struct sk_buff *skb;
205 	struct ieee80211_local *local;
206 	struct ieee80211_sub_if_data *sdata;
207 	struct sta_info *sta;
208 	struct ieee80211_key *key;
209 
210 	unsigned int flags;
211 
212 	/*
213 	 * Index into sequence numbers array, 0..16
214 	 * since the last (16) is used for non-QoS,
215 	 * will be 16 on non-QoS frames.
216 	 */
217 	int seqno_idx;
218 
219 	/*
220 	 * Index into the security IV/PN arrays, 0..16
221 	 * since the last (16) is used for CCMP-encrypted
222 	 * management frames, will be set to 16 on mgmt
223 	 * frames and 0 on non-QoS frames.
224 	 */
225 	int security_idx;
226 
227 	union {
228 		struct {
229 			u32 iv32;
230 			u16 iv16;
231 		} tkip;
232 		struct {
233 			u8 pn[IEEE80211_CCMP_PN_LEN];
234 		} ccm_gcm;
235 	};
236 };
237 
238 struct ieee80211_csa_settings {
239 	const u16 *counter_offsets_beacon;
240 	const u16 *counter_offsets_presp;
241 
242 	int n_counter_offsets_beacon;
243 	int n_counter_offsets_presp;
244 
245 	u8 count;
246 };
247 
248 struct ieee80211_color_change_settings {
249 	u16 counter_offset_beacon;
250 	u16 counter_offset_presp;
251 	u8 count;
252 };
253 
254 struct beacon_data {
255 	u8 *head, *tail;
256 	int head_len, tail_len;
257 	struct ieee80211_meshconf_ie *meshconf;
258 	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
259 	u8 cntdwn_current_counter;
260 	struct cfg80211_mbssid_elems *mbssid_ies;
261 	struct rcu_head rcu_head;
262 };
263 
264 struct probe_resp {
265 	struct rcu_head rcu_head;
266 	int len;
267 	u16 cntdwn_counter_offsets[IEEE80211_MAX_CNTDWN_COUNTERS_NUM];
268 	u8 data[];
269 };
270 
271 struct fils_discovery_data {
272 	struct rcu_head rcu_head;
273 	int len;
274 	u8 data[];
275 };
276 
277 struct unsol_bcast_probe_resp_data {
278 	struct rcu_head rcu_head;
279 	int len;
280 	u8 data[];
281 };
282 
283 struct ps_data {
284 	/* yes, this looks ugly, but guarantees that we can later use
285 	 * bitmap_empty :)
286 	 * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
287 	u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
288 			__aligned(__alignof__(unsigned long));
289 	struct sk_buff_head bc_buf;
290 	atomic_t num_sta_ps; /* number of stations in PS mode */
291 	int dtim_count;
292 	bool dtim_bc_mc;
293 };
294 
295 struct ieee80211_if_ap {
296 	struct beacon_data __rcu *beacon;
297 	struct probe_resp __rcu *probe_resp;
298 	struct fils_discovery_data __rcu *fils_discovery;
299 	struct unsol_bcast_probe_resp_data __rcu *unsol_bcast_probe_resp;
300 
301 	/* to be used after channel switch. */
302 	struct cfg80211_beacon_data *next_beacon;
303 	struct list_head vlans; /* write-protected with RTNL and local->mtx */
304 
305 	struct ps_data ps;
306 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
307 
308 	bool multicast_to_unicast;
309 };
310 
311 struct ieee80211_if_vlan {
312 	struct list_head list; /* write-protected with RTNL and local->mtx */
313 
314 	/* used for all tx if the VLAN is configured to 4-addr mode */
315 	struct sta_info __rcu *sta;
316 	atomic_t num_mcast_sta; /* number of stations receiving multicast */
317 };
318 
319 struct mesh_stats {
320 	__u32 fwded_mcast;		/* Mesh forwarded multicast frames */
321 	__u32 fwded_unicast;		/* Mesh forwarded unicast frames */
322 	__u32 fwded_frames;		/* Mesh total forwarded frames */
323 	__u32 dropped_frames_ttl;	/* Not transmitted since mesh_ttl == 0*/
324 	__u32 dropped_frames_no_route;	/* Not transmitted, no route found */
325 	__u32 dropped_frames_congestion;/* Not forwarded due to congestion */
326 };
327 
328 #define PREQ_Q_F_START		0x1
329 #define PREQ_Q_F_REFRESH	0x2
330 struct mesh_preq_queue {
331 	struct list_head list;
332 	u8 dst[ETH_ALEN];
333 	u8 flags;
334 };
335 
336 struct ieee80211_roc_work {
337 	struct list_head list;
338 
339 	struct ieee80211_sub_if_data *sdata;
340 
341 	struct ieee80211_channel *chan;
342 
343 	bool started, abort, hw_begun, notified;
344 	bool on_channel;
345 
346 	unsigned long start_time;
347 
348 	u32 duration, req_duration;
349 	struct sk_buff *frame;
350 	u64 cookie, mgmt_tx_cookie;
351 	enum ieee80211_roc_type type;
352 };
353 
354 /* flags used in struct ieee80211_if_managed.flags */
355 enum ieee80211_sta_flags {
356 	IEEE80211_STA_CONNECTION_POLL	= BIT(1),
357 	IEEE80211_STA_CONTROL_PORT	= BIT(2),
358 	IEEE80211_STA_DISABLE_HT	= BIT(4),
359 	IEEE80211_STA_MFP_ENABLED	= BIT(6),
360 	IEEE80211_STA_UAPSD_ENABLED	= BIT(7),
361 	IEEE80211_STA_NULLFUNC_ACKED	= BIT(8),
362 	IEEE80211_STA_RESET_SIGNAL_AVE	= BIT(9),
363 	IEEE80211_STA_DISABLE_40MHZ	= BIT(10),
364 	IEEE80211_STA_DISABLE_VHT	= BIT(11),
365 	IEEE80211_STA_DISABLE_80P80MHZ	= BIT(12),
366 	IEEE80211_STA_DISABLE_160MHZ	= BIT(13),
367 	IEEE80211_STA_DISABLE_WMM	= BIT(14),
368 	IEEE80211_STA_ENABLE_RRM	= BIT(15),
369 	IEEE80211_STA_DISABLE_HE	= BIT(16),
370 	IEEE80211_STA_DISABLE_EHT	= BIT(17),
371 	IEEE80211_STA_DISABLE_320MHZ	= BIT(18),
372 };
373 
374 struct ieee80211_mgd_auth_data {
375 	struct cfg80211_bss *bss;
376 	unsigned long timeout;
377 	int tries;
378 	u16 algorithm, expected_transaction;
379 
380 	u8 key[WLAN_KEY_LEN_WEP104];
381 	u8 key_len, key_idx;
382 	bool done, waiting;
383 	bool peer_confirmed;
384 	bool timeout_started;
385 
386 	u16 sae_trans, sae_status;
387 	size_t data_len;
388 	u8 data[];
389 };
390 
391 struct ieee80211_mgd_assoc_data {
392 	struct cfg80211_bss *bss;
393 	const u8 *supp_rates;
394 
395 	unsigned long timeout;
396 	int tries;
397 
398 	u16 capability;
399 	u8 prev_bssid[ETH_ALEN];
400 	u8 ssid[IEEE80211_MAX_SSID_LEN];
401 	u8 ssid_len;
402 	u8 supp_rates_len;
403 	bool wmm, uapsd;
404 	bool need_beacon;
405 	bool synced;
406 	bool timeout_started;
407 
408 	u8 ap_ht_param;
409 
410 	struct ieee80211_vht_cap ap_vht_cap;
411 
412 	u8 fils_nonces[2 * FILS_NONCE_LEN];
413 	u8 fils_kek[FILS_MAX_KEK_LEN];
414 	size_t fils_kek_len;
415 
416 	size_t ie_len;
417 	u8 ie[];
418 };
419 
420 struct ieee80211_sta_tx_tspec {
421 	/* timestamp of the first packet in the time slice */
422 	unsigned long time_slice_start;
423 
424 	u32 admitted_time; /* in usecs, unlike over the air */
425 	u8 tsid;
426 	s8 up; /* signed to be able to invalidate with -1 during teardown */
427 
428 	/* consumed TX time in microseconds in the time slice */
429 	u32 consumed_tx_time;
430 	enum {
431 		TX_TSPEC_ACTION_NONE = 0,
432 		TX_TSPEC_ACTION_DOWNGRADE,
433 		TX_TSPEC_ACTION_STOP_DOWNGRADE,
434 	} action;
435 	bool downgraded;
436 };
437 
438 DECLARE_EWMA(beacon_signal, 4, 4)
439 
440 struct ieee80211_if_managed {
441 	struct timer_list timer;
442 	struct timer_list conn_mon_timer;
443 	struct timer_list bcn_mon_timer;
444 	struct timer_list chswitch_timer;
445 	struct work_struct monitor_work;
446 	struct work_struct chswitch_work;
447 	struct work_struct beacon_connection_loss_work;
448 	struct work_struct csa_connection_drop_work;
449 
450 	unsigned long beacon_timeout;
451 	unsigned long probe_timeout;
452 	int probe_send_count;
453 	bool nullfunc_failed;
454 	u8 connection_loss:1,
455 	   driver_disconnect:1,
456 	   reconnect:1,
457 	   associated:1;
458 
459 	struct cfg80211_bss *assoc_bss;
460 	struct ieee80211_mgd_auth_data *auth_data;
461 	struct ieee80211_mgd_assoc_data *assoc_data;
462 
463 	u8 bssid[ETH_ALEN] __aligned(2);
464 
465 	bool powersave; /* powersave requested for this iface */
466 	bool broken_ap; /* AP is broken -- turn off powersave */
467 	bool have_beacon;
468 	u8 dtim_period;
469 	enum ieee80211_smps_mode req_smps, /* requested smps mode */
470 				 driver_smps_mode; /* smps mode request */
471 
472 	struct work_struct request_smps_work;
473 
474 	unsigned int flags;
475 
476 	bool csa_waiting_bcn;
477 	bool csa_ignored_same_chan;
478 
479 	bool beacon_crc_valid;
480 	u32 beacon_crc;
481 
482 	bool status_acked;
483 	bool status_received;
484 	__le16 status_fc;
485 
486 	enum {
487 		IEEE80211_MFP_DISABLED,
488 		IEEE80211_MFP_OPTIONAL,
489 		IEEE80211_MFP_REQUIRED
490 	} mfp; /* management frame protection */
491 
492 	/*
493 	 * Bitmask of enabled u-apsd queues,
494 	 * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
495 	 * to take effect.
496 	 */
497 	unsigned int uapsd_queues;
498 
499 	/*
500 	 * Maximum number of buffered frames AP can deliver during a
501 	 * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
502 	 * Needs a new association to take effect.
503 	 */
504 	unsigned int uapsd_max_sp_len;
505 
506 	int wmm_last_param_set;
507 	int mu_edca_last_param_set;
508 
509 	u8 use_4addr;
510 
511 	s16 p2p_noa_index;
512 
513 	struct ewma_beacon_signal ave_beacon_signal;
514 
515 	/*
516 	 * Number of Beacon frames used in ave_beacon_signal. This can be used
517 	 * to avoid generating less reliable cqm events that would be based
518 	 * only on couple of received frames.
519 	 */
520 	unsigned int count_beacon_signal;
521 
522 	/* Number of times beacon loss was invoked. */
523 	unsigned int beacon_loss_count;
524 
525 	/*
526 	 * Last Beacon frame signal strength average (ave_beacon_signal / 16)
527 	 * that triggered a cqm event. 0 indicates that no event has been
528 	 * generated for the current association.
529 	 */
530 	int last_cqm_event_signal;
531 
532 	/*
533 	 * State variables for keeping track of RSSI of the AP currently
534 	 * connected to and informing driver when RSSI has gone
535 	 * below/above a certain threshold.
536 	 */
537 	int rssi_min_thold, rssi_max_thold;
538 	int last_ave_beacon_signal;
539 
540 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
541 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
542 	struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
543 	struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
544 	struct ieee80211_s1g_cap s1g_capa; /* configured S1G overrides */
545 	struct ieee80211_s1g_cap s1g_capa_mask; /* valid s1g_capa bits */
546 
547 	/* TDLS support */
548 	u8 tdls_peer[ETH_ALEN] __aligned(2);
549 	struct delayed_work tdls_peer_del_work;
550 	struct sk_buff *orig_teardown_skb; /* The original teardown skb */
551 	struct sk_buff *teardown_skb; /* A copy to send through the AP */
552 	spinlock_t teardown_lock; /* To lock changing teardown_skb */
553 	bool tdls_chan_switch_prohibited;
554 	bool tdls_wider_bw_prohibited;
555 
556 	/* WMM-AC TSPEC support */
557 	struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
558 	/* Use a separate work struct so that we can do something here
559 	 * while the sdata->work is flushing the queues, for example.
560 	 * otherwise, in scenarios where we hardly get any traffic out
561 	 * on the BE queue, but there's a lot of VO traffic, we might
562 	 * get stuck in a downgraded situation and flush takes forever.
563 	 */
564 	struct delayed_work tx_tspec_wk;
565 
566 	/* Information elements from the last transmitted (Re)Association
567 	 * Request frame.
568 	 */
569 	u8 *assoc_req_ies;
570 	size_t assoc_req_ies_len;
571 };
572 
573 struct ieee80211_if_ibss {
574 	struct timer_list timer;
575 	struct work_struct csa_connection_drop_work;
576 
577 	unsigned long last_scan_completed;
578 
579 	u32 basic_rates;
580 
581 	bool fixed_bssid;
582 	bool fixed_channel;
583 	bool privacy;
584 
585 	bool control_port;
586 	bool userspace_handles_dfs;
587 
588 	u8 bssid[ETH_ALEN] __aligned(2);
589 	u8 ssid[IEEE80211_MAX_SSID_LEN];
590 	u8 ssid_len, ie_len;
591 	u8 *ie;
592 	struct cfg80211_chan_def chandef;
593 
594 	unsigned long ibss_join_req;
595 	/* probe response/beacon for IBSS */
596 	struct beacon_data __rcu *presp;
597 
598 	struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
599 	struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
600 
601 	spinlock_t incomplete_lock;
602 	struct list_head incomplete_stations;
603 
604 	enum {
605 		IEEE80211_IBSS_MLME_SEARCH,
606 		IEEE80211_IBSS_MLME_JOINED,
607 	} state;
608 };
609 
610 /**
611  * struct ieee80211_if_ocb - OCB mode state
612  *
613  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
614  * @wrkq_flags: OCB deferred task action
615  * @incomplete_lock: delayed STA insertion lock
616  * @incomplete_stations: list of STAs waiting for delayed insertion
617  * @joined: indication if the interface is connected to an OCB network
618  */
619 struct ieee80211_if_ocb {
620 	struct timer_list housekeeping_timer;
621 	unsigned long wrkq_flags;
622 
623 	spinlock_t incomplete_lock;
624 	struct list_head incomplete_stations;
625 
626 	bool joined;
627 };
628 
629 /**
630  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
631  *
632  * these declarations define the interface, which enables
633  * vendor-specific mesh synchronization
634  *
635  */
636 struct ieee802_11_elems;
637 struct ieee80211_mesh_sync_ops {
638 	void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata, u16 stype,
639 			     struct ieee80211_mgmt *mgmt, unsigned int len,
640 			     const struct ieee80211_meshconf_ie *mesh_cfg,
641 			     struct ieee80211_rx_status *rx_status);
642 
643 	/* should be called with beacon_data under RCU read lock */
644 	void (*adjust_tsf)(struct ieee80211_sub_if_data *sdata,
645 			   struct beacon_data *beacon);
646 	/* add other framework functions here */
647 };
648 
649 struct mesh_csa_settings {
650 	struct rcu_head rcu_head;
651 	struct cfg80211_csa_settings settings;
652 };
653 
654 /**
655  * struct mesh_table
656  *
657  * @known_gates: list of known mesh gates and their mpaths by the station. The
658  * gate's mpath may or may not be resolved and active.
659  * @gates_lock: protects updates to known_gates
660  * @rhead: the rhashtable containing struct mesh_paths, keyed by dest addr
661  * @walk_head: linked list containing all mesh_path objects
662  * @walk_lock: lock protecting walk_head
663  * @entries: number of entries in the table
664  */
665 struct mesh_table {
666 	struct hlist_head known_gates;
667 	spinlock_t gates_lock;
668 	struct rhashtable rhead;
669 	struct hlist_head walk_head;
670 	spinlock_t walk_lock;
671 	atomic_t entries;		/* Up to MAX_MESH_NEIGHBOURS */
672 };
673 
674 struct ieee80211_if_mesh {
675 	struct timer_list housekeeping_timer;
676 	struct timer_list mesh_path_timer;
677 	struct timer_list mesh_path_root_timer;
678 
679 	unsigned long wrkq_flags;
680 	unsigned long mbss_changed;
681 
682 	bool userspace_handles_dfs;
683 
684 	u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
685 	size_t mesh_id_len;
686 	/* Active Path Selection Protocol Identifier */
687 	u8 mesh_pp_id;
688 	/* Active Path Selection Metric Identifier */
689 	u8 mesh_pm_id;
690 	/* Congestion Control Mode Identifier */
691 	u8 mesh_cc_id;
692 	/* Synchronization Protocol Identifier */
693 	u8 mesh_sp_id;
694 	/* Authentication Protocol Identifier */
695 	u8 mesh_auth_id;
696 	/* Local mesh Sequence Number */
697 	u32 sn;
698 	/* Last used PREQ ID */
699 	u32 preq_id;
700 	atomic_t mpaths;
701 	/* Timestamp of last SN update */
702 	unsigned long last_sn_update;
703 	/* Time when it's ok to send next PERR */
704 	unsigned long next_perr;
705 	/* Timestamp of last PREQ sent */
706 	unsigned long last_preq;
707 	struct mesh_rmc *rmc;
708 	spinlock_t mesh_preq_queue_lock;
709 	struct mesh_preq_queue preq_queue;
710 	int preq_queue_len;
711 	struct mesh_stats mshstats;
712 	struct mesh_config mshcfg;
713 	atomic_t estab_plinks;
714 	u32 mesh_seqnum;
715 	bool accepting_plinks;
716 	int num_gates;
717 	struct beacon_data __rcu *beacon;
718 	const u8 *ie;
719 	u8 ie_len;
720 	enum {
721 		IEEE80211_MESH_SEC_NONE = 0x0,
722 		IEEE80211_MESH_SEC_AUTHED = 0x1,
723 		IEEE80211_MESH_SEC_SECURED = 0x2,
724 	} security;
725 	bool user_mpm;
726 	/* Extensible Synchronization Framework */
727 	const struct ieee80211_mesh_sync_ops *sync_ops;
728 	s64 sync_offset_clockdrift_max;
729 	spinlock_t sync_offset_lock;
730 	/* mesh power save */
731 	enum nl80211_mesh_power_mode nonpeer_pm;
732 	int ps_peers_light_sleep;
733 	int ps_peers_deep_sleep;
734 	struct ps_data ps;
735 	/* Channel Switching Support */
736 	struct mesh_csa_settings __rcu *csa;
737 	enum {
738 		IEEE80211_MESH_CSA_ROLE_NONE,
739 		IEEE80211_MESH_CSA_ROLE_INIT,
740 		IEEE80211_MESH_CSA_ROLE_REPEATER,
741 	} csa_role;
742 	u8 chsw_ttl;
743 	u16 pre_value;
744 
745 	/* offset from skb->data while building IE */
746 	int meshconf_offset;
747 
748 	struct mesh_table mesh_paths;
749 	struct mesh_table mpp_paths; /* Store paths for MPP&MAP */
750 	int mesh_paths_generation;
751 	int mpp_paths_generation;
752 };
753 
754 #ifdef CONFIG_MAC80211_MESH
755 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name)	\
756 	do { (msh)->mshstats.name++; } while (0)
757 #else
758 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
759 	do { } while (0)
760 #endif
761 
762 /**
763  * enum ieee80211_sub_if_data_flags - virtual interface flags
764  *
765  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
766  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
767  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
768  *	associated stations and deliver multicast frames both
769  *	back to wireless media and to the local net stack.
770  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
771  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
772  * @IEEE80211_SDATA_DISCONNECT_HW_RESTART: Disconnect after hardware restart
773  *  recovery
774  */
775 enum ieee80211_sub_if_data_flags {
776 	IEEE80211_SDATA_ALLMULTI		= BIT(0),
777 	IEEE80211_SDATA_OPERATING_GMODE		= BIT(2),
778 	IEEE80211_SDATA_DONT_BRIDGE_PACKETS	= BIT(3),
779 	IEEE80211_SDATA_DISCONNECT_RESUME	= BIT(4),
780 	IEEE80211_SDATA_IN_DRIVER		= BIT(5),
781 	IEEE80211_SDATA_DISCONNECT_HW_RESTART	= BIT(6),
782 };
783 
784 /**
785  * enum ieee80211_sdata_state_bits - virtual interface state bits
786  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
787  *	mirrors netif_running() but is separate for interface type
788  *	change handling while the interface is up
789  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
790  *	mode, so queues are stopped
791  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
792  *	to offchannel, reset when offchannel returns
793  */
794 enum ieee80211_sdata_state_bits {
795 	SDATA_STATE_RUNNING,
796 	SDATA_STATE_OFFCHANNEL,
797 	SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
798 };
799 
800 /**
801  * enum ieee80211_chanctx_mode - channel context configuration mode
802  *
803  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
804  *	multiple interfaces
805  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
806  *	only by a single interface. This can be used for example for
807  *	non-fixed channel IBSS.
808  */
809 enum ieee80211_chanctx_mode {
810 	IEEE80211_CHANCTX_SHARED,
811 	IEEE80211_CHANCTX_EXCLUSIVE
812 };
813 
814 /**
815  * enum ieee80211_chanctx_replace_state - channel context replacement state
816  *
817  * This is used for channel context in-place reservations that require channel
818  * context switch/swap.
819  *
820  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
821  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
822  *	by a (not yet registered) channel context pointed by %replace_ctx.
823  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
824  *	replaces an existing channel context pointed to by %replace_ctx.
825  */
826 enum ieee80211_chanctx_replace_state {
827 	IEEE80211_CHANCTX_REPLACE_NONE,
828 	IEEE80211_CHANCTX_WILL_BE_REPLACED,
829 	IEEE80211_CHANCTX_REPLACES_OTHER,
830 };
831 
832 struct ieee80211_chanctx {
833 	struct list_head list;
834 	struct rcu_head rcu_head;
835 
836 	struct list_head assigned_vifs;
837 	struct list_head reserved_vifs;
838 
839 	enum ieee80211_chanctx_replace_state replace_state;
840 	struct ieee80211_chanctx *replace_ctx;
841 
842 	enum ieee80211_chanctx_mode mode;
843 	bool driver_present;
844 
845 	struct ieee80211_chanctx_conf conf;
846 };
847 
848 struct mac80211_qos_map {
849 	struct cfg80211_qos_map qos_map;
850 	struct rcu_head rcu_head;
851 };
852 
853 enum txq_info_flags {
854 	IEEE80211_TXQ_STOP,
855 	IEEE80211_TXQ_AMPDU,
856 	IEEE80211_TXQ_NO_AMSDU,
857 	IEEE80211_TXQ_STOP_NETIF_TX,
858 };
859 
860 /**
861  * struct txq_info - per tid queue
862  *
863  * @tin: contains packets split into multiple flows
864  * @def_flow: used as a fallback flow when a packet destined to @tin hashes to
865  *	a fq_flow which is already owned by a different tin
866  * @def_cvars: codel vars for @def_flow
867  * @schedule_order: used with ieee80211_local->active_txqs
868  * @frags: used to keep fragments created after dequeue
869  */
870 struct txq_info {
871 	struct fq_tin tin;
872 	struct codel_vars def_cvars;
873 	struct codel_stats cstats;
874 	struct rb_node schedule_order;
875 
876 	struct sk_buff_head frags;
877 	unsigned long flags;
878 
879 	/* keep last! */
880 	struct ieee80211_txq txq;
881 };
882 
883 struct ieee80211_if_mntr {
884 	u32 flags;
885 	u8 mu_follow_addr[ETH_ALEN] __aligned(2);
886 
887 	struct list_head list;
888 };
889 
890 /**
891  * struct ieee80211_if_nan - NAN state
892  *
893  * @conf: current NAN configuration
894  * @func_ids: a bitmap of available instance_id's
895  */
896 struct ieee80211_if_nan {
897 	struct cfg80211_nan_conf conf;
898 
899 	/* protects function_inst_ids */
900 	spinlock_t func_lock;
901 	struct idr function_inst_ids;
902 };
903 
904 struct ieee80211_sub_if_data {
905 	struct list_head list;
906 
907 	struct wireless_dev wdev;
908 
909 	/* keys */
910 	struct list_head key_list;
911 
912 	/* count for keys needing tailroom space allocation */
913 	int crypto_tx_tailroom_needed_cnt;
914 	int crypto_tx_tailroom_pending_dec;
915 	struct delayed_work dec_tailroom_needed_wk;
916 
917 	struct net_device *dev;
918 	struct ieee80211_local *local;
919 
920 	unsigned int flags;
921 
922 	unsigned long state;
923 
924 	char name[IFNAMSIZ];
925 
926 	struct ieee80211_fragment_cache frags;
927 
928 	/* TID bitmap for NoAck policy */
929 	u16 noack_map;
930 
931 	/* bit field of ACM bits (BIT(802.1D tag)) */
932 	u8 wmm_acm;
933 
934 	struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS +
935 					 NUM_DEFAULT_MGMT_KEYS +
936 					 NUM_DEFAULT_BEACON_KEYS];
937 	struct ieee80211_key __rcu *default_unicast_key;
938 	struct ieee80211_key __rcu *default_multicast_key;
939 	struct ieee80211_key __rcu *default_mgmt_key;
940 	struct ieee80211_key __rcu *default_beacon_key;
941 
942 	u16 sequence_number;
943 	__be16 control_port_protocol;
944 	bool control_port_no_encrypt;
945 	bool control_port_no_preauth;
946 	bool control_port_over_nl80211;
947 	int encrypt_headroom;
948 
949 	atomic_t num_tx_queued;
950 	struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
951 	struct mac80211_qos_map __rcu *qos_map;
952 
953 	struct airtime_info airtime[IEEE80211_NUM_ACS];
954 
955 	struct work_struct csa_finalize_work;
956 	bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
957 	struct cfg80211_chan_def csa_chandef;
958 
959 	struct work_struct color_change_finalize_work;
960 
961 	struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
962 	struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
963 
964 	/* context reservation -- protected with chanctx_mtx */
965 	struct ieee80211_chanctx *reserved_chanctx;
966 	struct cfg80211_chan_def reserved_chandef;
967 	bool reserved_radar_required;
968 	bool reserved_ready;
969 
970 	/* used to reconfigure hardware SM PS */
971 	struct work_struct recalc_smps;
972 
973 	struct work_struct work;
974 	struct sk_buff_head skb_queue;
975 	struct sk_buff_head status_queue;
976 
977 	u8 needed_rx_chains;
978 	enum ieee80211_smps_mode smps_mode;
979 
980 	int user_power_level; /* in dBm */
981 	int ap_power_level; /* in dBm */
982 
983 	bool radar_required;
984 	struct delayed_work dfs_cac_timer_work;
985 
986 	/*
987 	 * AP this belongs to: self in AP mode and
988 	 * corresponding AP in VLAN mode, NULL for
989 	 * all others (might be needed later in IBSS)
990 	 */
991 	struct ieee80211_if_ap *bss;
992 
993 	/* bitmap of allowed (non-MCS) rate indexes for rate control */
994 	u32 rc_rateidx_mask[NUM_NL80211_BANDS];
995 
996 	bool rc_has_mcs_mask[NUM_NL80211_BANDS];
997 	u8  rc_rateidx_mcs_mask[NUM_NL80211_BANDS][IEEE80211_HT_MCS_MASK_LEN];
998 
999 	bool rc_has_vht_mcs_mask[NUM_NL80211_BANDS];
1000 	u16 rc_rateidx_vht_mcs_mask[NUM_NL80211_BANDS][NL80211_VHT_NSS_MAX];
1001 
1002 	/* Beacon frame (non-MCS) rate (as a bitmap) */
1003 	u32 beacon_rateidx_mask[NUM_NL80211_BANDS];
1004 	bool beacon_rate_set;
1005 
1006 	union {
1007 		struct ieee80211_if_ap ap;
1008 		struct ieee80211_if_vlan vlan;
1009 		struct ieee80211_if_managed mgd;
1010 		struct ieee80211_if_ibss ibss;
1011 		struct ieee80211_if_mesh mesh;
1012 		struct ieee80211_if_ocb ocb;
1013 		struct ieee80211_if_mntr mntr;
1014 		struct ieee80211_if_nan nan;
1015 	} u;
1016 
1017 #ifdef CONFIG_MAC80211_DEBUGFS
1018 	struct {
1019 		struct dentry *subdir_stations;
1020 		struct dentry *default_unicast_key;
1021 		struct dentry *default_multicast_key;
1022 		struct dentry *default_mgmt_key;
1023 		struct dentry *default_beacon_key;
1024 	} debugfs;
1025 #endif
1026 
1027 	/* must be last, dynamically sized area in this! */
1028 	struct ieee80211_vif vif;
1029 };
1030 
1031 static inline
vif_to_sdata(struct ieee80211_vif * p)1032 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
1033 {
1034 	return container_of(p, struct ieee80211_sub_if_data, vif);
1035 }
1036 
sdata_lock(struct ieee80211_sub_if_data * sdata)1037 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
1038 	__acquires(&sdata->wdev.mtx)
1039 {
1040 	mutex_lock(&sdata->wdev.mtx);
1041 	__acquire(&sdata->wdev.mtx);
1042 }
1043 
sdata_unlock(struct ieee80211_sub_if_data * sdata)1044 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
1045 	__releases(&sdata->wdev.mtx)
1046 {
1047 	mutex_unlock(&sdata->wdev.mtx);
1048 	__release(&sdata->wdev.mtx);
1049 }
1050 
1051 #define sdata_dereference(p, sdata) \
1052 	rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
1053 
1054 static inline void
sdata_assert_lock(struct ieee80211_sub_if_data * sdata)1055 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
1056 {
1057 	lockdep_assert_held(&sdata->wdev.mtx);
1058 }
1059 
1060 static inline int
ieee80211_chandef_get_shift(struct cfg80211_chan_def * chandef)1061 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
1062 {
1063 	switch (chandef->width) {
1064 	case NL80211_CHAN_WIDTH_5:
1065 		return 2;
1066 	case NL80211_CHAN_WIDTH_10:
1067 		return 1;
1068 	default:
1069 		return 0;
1070 	}
1071 }
1072 
1073 static inline int
ieee80211_vif_get_shift(struct ieee80211_vif * vif)1074 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
1075 {
1076 	struct ieee80211_chanctx_conf *chanctx_conf;
1077 	int shift = 0;
1078 
1079 	rcu_read_lock();
1080 	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);
1081 	if (chanctx_conf)
1082 		shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1083 	rcu_read_unlock();
1084 
1085 	return shift;
1086 }
1087 
1088 static inline int
ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems * elems)1089 ieee80211_get_mbssid_beacon_len(struct cfg80211_mbssid_elems *elems)
1090 {
1091 	int i, len = 0;
1092 
1093 	if (!elems)
1094 		return 0;
1095 
1096 	for (i = 0; i < elems->cnt; i++)
1097 		len += elems->elem[i].len;
1098 
1099 	return len;
1100 }
1101 
1102 enum {
1103 	IEEE80211_RX_MSG	= 1,
1104 	IEEE80211_TX_STATUS_MSG	= 2,
1105 };
1106 
1107 enum queue_stop_reason {
1108 	IEEE80211_QUEUE_STOP_REASON_DRIVER,
1109 	IEEE80211_QUEUE_STOP_REASON_PS,
1110 	IEEE80211_QUEUE_STOP_REASON_CSA,
1111 	IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1112 	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1113 	IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1114 	IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1115 	IEEE80211_QUEUE_STOP_REASON_FLUSH,
1116 	IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1117 	IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1118 	IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE,
1119 
1120 	IEEE80211_QUEUE_STOP_REASONS,
1121 };
1122 
1123 #ifdef CONFIG_MAC80211_LEDS
1124 struct tpt_led_trigger {
1125 	char name[32];
1126 	const struct ieee80211_tpt_blink *blink_table;
1127 	unsigned int blink_table_len;
1128 	struct timer_list timer;
1129 	struct ieee80211_local *local;
1130 	unsigned long prev_traffic;
1131 	unsigned long tx_bytes, rx_bytes;
1132 	unsigned int active, want;
1133 	bool running;
1134 };
1135 #endif
1136 
1137 /**
1138  * mac80211 scan flags - currently active scan mode
1139  *
1140  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1141  *	well be on the operating channel
1142  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1143  *	determine if we are on the operating channel or not
1144  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1145  *	channel. This should not interrupt normal traffic.
1146  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1147  *	that the scan completed.
1148  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1149  *	a scan complete for an aborted scan.
1150  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1151  *	cancelled.
1152  * @SCAN_BEACON_WAIT: Set whenever we're passive scanning because of radar/no-IR
1153  *	and could send a probe request after receiving a beacon.
1154  * @SCAN_BEACON_DONE: Beacon received, we can now send a probe request
1155  */
1156 enum {
1157 	SCAN_SW_SCANNING,
1158 	SCAN_HW_SCANNING,
1159 	SCAN_ONCHANNEL_SCANNING,
1160 	SCAN_COMPLETED,
1161 	SCAN_ABORTED,
1162 	SCAN_HW_CANCELLED,
1163 	SCAN_BEACON_WAIT,
1164 	SCAN_BEACON_DONE,
1165 };
1166 
1167 /**
1168  * enum mac80211_scan_state - scan state machine states
1169  *
1170  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1171  *	determines if we should keep on scanning or switch back to the
1172  *	operating channel
1173  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1174  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1175  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1176  *	send out data
1177  * @SCAN_RESUME: Resume the scan and scan the next channel
1178  * @SCAN_ABORT: Abort the scan and go back to operating channel
1179  */
1180 enum mac80211_scan_state {
1181 	SCAN_DECISION,
1182 	SCAN_SET_CHANNEL,
1183 	SCAN_SEND_PROBE,
1184 	SCAN_SUSPEND,
1185 	SCAN_RESUME,
1186 	SCAN_ABORT,
1187 };
1188 
1189 /**
1190  * struct airtime_sched_info - state used for airtime scheduling and AQL
1191  *
1192  * @lock: spinlock that protects all the fields in this struct
1193  * @active_txqs: rbtree of currently backlogged queues, sorted by virtual time
1194  * @schedule_pos: the current position maintained while a driver walks the tree
1195  *                with ieee80211_next_txq()
1196  * @active_list: list of struct airtime_info structs that were active within
1197  *               the last AIRTIME_ACTIVE_DURATION (100 ms), used to compute
1198  *               weight_sum
1199  * @last_weight_update: used for rate limiting walking active_list
1200  * @last_schedule_time: tracks the last time a transmission was scheduled; used
1201  *                      for catching up v_t if no stations are eligible for
1202  *                      transmission.
1203  * @v_t: global virtual time; queues with v_t < this are eligible for
1204  *       transmission
1205  * @weight_sum: total sum of all active stations used for dividing airtime
1206  * @weight_sum_reciprocal: reciprocal of weight_sum (to avoid divisions in fast
1207  *                         path - see comment above
1208  *                         IEEE80211_RECIPROCAL_DIVISOR_64)
1209  * @aql_txq_limit_low: AQL limit when total outstanding airtime
1210  *                     is < IEEE80211_AQL_THRESHOLD
1211  * @aql_txq_limit_high: AQL limit when total outstanding airtime
1212  *                      is > IEEE80211_AQL_THRESHOLD
1213  */
1214 struct airtime_sched_info {
1215 	spinlock_t lock;
1216 	struct rb_root_cached active_txqs;
1217 	struct rb_node *schedule_pos;
1218 	struct list_head active_list;
1219 	u64 last_weight_update;
1220 	u64 last_schedule_activity;
1221 	u64 v_t;
1222 	u64 weight_sum;
1223 	u64 weight_sum_reciprocal;
1224 	u32 aql_txq_limit_low;
1225 	u32 aql_txq_limit_high;
1226 };
1227 DECLARE_STATIC_KEY_FALSE(aql_disable);
1228 
1229 struct ieee80211_local {
1230 	/* embed the driver visible part.
1231 	 * don't cast (use the static inlines below), but we keep
1232 	 * it first anyway so they become a no-op */
1233 	struct ieee80211_hw hw;
1234 
1235 	struct fq fq;
1236 	struct codel_vars *cvars;
1237 	struct codel_params cparams;
1238 
1239 	/* protects active_txqs and txqi->schedule_order */
1240 	struct airtime_sched_info airtime[IEEE80211_NUM_ACS];
1241 	u16 airtime_flags;
1242 	u32 aql_threshold;
1243 	atomic_t aql_total_pending_airtime;
1244 
1245 	const struct ieee80211_ops *ops;
1246 
1247 	/*
1248 	 * private workqueue to mac80211. mac80211 makes this accessible
1249 	 * via ieee80211_queue_work()
1250 	 */
1251 	struct workqueue_struct *workqueue;
1252 
1253 	unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1254 	int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1255 	/* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1256 	spinlock_t queue_stop_reason_lock;
1257 
1258 	int open_count;
1259 	int monitors, cooked_mntrs;
1260 	/* number of interfaces with corresponding FIF_ flags */
1261 	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1262 	    fif_probe_req;
1263 	bool probe_req_reg;
1264 	bool rx_mcast_action_reg;
1265 	unsigned int filter_flags; /* FIF_* */
1266 
1267 	bool wiphy_ciphers_allocated;
1268 
1269 	bool use_chanctx;
1270 
1271 	/* protects the aggregated multicast list and filter calls */
1272 	spinlock_t filter_lock;
1273 
1274 	/* used for uploading changed mc list */
1275 	struct work_struct reconfig_filter;
1276 
1277 	/* aggregated multicast list */
1278 	struct netdev_hw_addr_list mc_list;
1279 
1280 	bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1281 
1282 	/*
1283 	 * suspended is true if we finished all the suspend _and_ we have
1284 	 * not yet come up from resume. This is to be used by mac80211
1285 	 * to ensure driver sanity during suspend and mac80211's own
1286 	 * sanity. It can eventually be used for WoW as well.
1287 	 */
1288 	bool suspended;
1289 
1290 	/* suspending is true during the whole suspend process */
1291 	bool suspending;
1292 
1293 	/*
1294 	 * Resuming is true while suspended, but when we're reprogramming the
1295 	 * hardware -- at that time it's allowed to use ieee80211_queue_work()
1296 	 * again even though some other parts of the stack are still suspended
1297 	 * and we still drop received frames to avoid waking the stack.
1298 	 */
1299 	bool resuming;
1300 
1301 	/*
1302 	 * quiescing is true during the suspend process _only_ to
1303 	 * ease timer cancelling etc.
1304 	 */
1305 	bool quiescing;
1306 
1307 	/* device is started */
1308 	bool started;
1309 
1310 	/* device is during a HW reconfig */
1311 	bool in_reconfig;
1312 
1313 	/* wowlan is enabled -- don't reconfig on resume */
1314 	bool wowlan;
1315 
1316 	struct work_struct radar_detected_work;
1317 
1318 	/* number of RX chains the hardware has */
1319 	u8 rx_chains;
1320 
1321 	/* bitmap of which sbands were copied */
1322 	u8 sband_allocated;
1323 
1324 	int tx_headroom; /* required headroom for hardware/radiotap */
1325 
1326 	/* Tasklet and skb queue to process calls from IRQ mode. All frames
1327 	 * added to skb_queue will be processed, but frames in
1328 	 * skb_queue_unreliable may be dropped if the total length of these
1329 	 * queues increases over the limit. */
1330 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1331 	struct tasklet_struct tasklet;
1332 	struct sk_buff_head skb_queue;
1333 	struct sk_buff_head skb_queue_unreliable;
1334 
1335 	spinlock_t rx_path_lock;
1336 
1337 	/* Station data */
1338 	/*
1339 	 * The mutex only protects the list, hash table and
1340 	 * counter, reads are done with RCU.
1341 	 */
1342 	struct mutex sta_mtx;
1343 	spinlock_t tim_lock;
1344 	unsigned long num_sta;
1345 	struct list_head sta_list;
1346 	struct rhltable sta_hash;
1347 	struct timer_list sta_cleanup;
1348 	int sta_generation;
1349 
1350 	struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1351 	struct tasklet_struct tx_pending_tasklet;
1352 	struct tasklet_struct wake_txqs_tasklet;
1353 
1354 	atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1355 
1356 	/* number of interfaces with allmulti RX */
1357 	atomic_t iff_allmultis;
1358 
1359 	struct rate_control_ref *rate_ctrl;
1360 
1361 	struct arc4_ctx wep_tx_ctx;
1362 	struct arc4_ctx wep_rx_ctx;
1363 	u32 wep_iv;
1364 
1365 	/* see iface.c */
1366 	struct list_head interfaces;
1367 	struct list_head mon_list; /* only that are IFF_UP && !cooked */
1368 	struct mutex iflist_mtx;
1369 
1370 	/*
1371 	 * Key mutex, protects sdata's key_list and sta_info's
1372 	 * key pointers and ptk_idx (write access, they're RCU.)
1373 	 */
1374 	struct mutex key_mtx;
1375 
1376 	/* mutex for scan and work locking */
1377 	struct mutex mtx;
1378 
1379 	/* Scanning and BSS list */
1380 	unsigned long scanning;
1381 	struct cfg80211_ssid scan_ssid;
1382 	struct cfg80211_scan_request *int_scan_req;
1383 	struct cfg80211_scan_request __rcu *scan_req;
1384 	struct ieee80211_scan_request *hw_scan_req;
1385 	struct cfg80211_chan_def scan_chandef;
1386 	enum nl80211_band hw_scan_band;
1387 	int scan_channel_idx;
1388 	int scan_ies_len;
1389 	int hw_scan_ies_bufsize;
1390 	struct cfg80211_scan_info scan_info;
1391 
1392 	struct work_struct sched_scan_stopped_work;
1393 	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1394 	struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1395 	u8 scan_addr[ETH_ALEN];
1396 
1397 	unsigned long leave_oper_channel_time;
1398 	enum mac80211_scan_state next_scan_state;
1399 	struct delayed_work scan_work;
1400 	struct ieee80211_sub_if_data __rcu *scan_sdata;
1401 	/* For backward compatibility only -- do not use */
1402 	struct cfg80211_chan_def _oper_chandef;
1403 
1404 	/* Temporary remain-on-channel for off-channel operations */
1405 	struct ieee80211_channel *tmp_channel;
1406 
1407 	/* channel contexts */
1408 	struct list_head chanctx_list;
1409 	struct mutex chanctx_mtx;
1410 
1411 #ifdef CONFIG_MAC80211_LEDS
1412 	struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1413 	struct led_trigger tpt_led;
1414 	atomic_t tx_led_active, rx_led_active, assoc_led_active;
1415 	atomic_t radio_led_active, tpt_led_active;
1416 	struct tpt_led_trigger *tpt_led_trigger;
1417 #endif
1418 
1419 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1420 	/* SNMP counters */
1421 	/* dot11CountersTable */
1422 	u32 dot11TransmittedFragmentCount;
1423 	u32 dot11MulticastTransmittedFrameCount;
1424 	u32 dot11FailedCount;
1425 	u32 dot11RetryCount;
1426 	u32 dot11MultipleRetryCount;
1427 	u32 dot11FrameDuplicateCount;
1428 	u32 dot11ReceivedFragmentCount;
1429 	u32 dot11MulticastReceivedFrameCount;
1430 	u32 dot11TransmittedFrameCount;
1431 
1432 	/* TX/RX handler statistics */
1433 	unsigned int tx_handlers_drop;
1434 	unsigned int tx_handlers_queued;
1435 	unsigned int tx_handlers_drop_wep;
1436 	unsigned int tx_handlers_drop_not_assoc;
1437 	unsigned int tx_handlers_drop_unauth_port;
1438 	unsigned int rx_handlers_drop;
1439 	unsigned int rx_handlers_queued;
1440 	unsigned int rx_handlers_drop_nullfunc;
1441 	unsigned int rx_handlers_drop_defrag;
1442 	unsigned int tx_expand_skb_head;
1443 	unsigned int tx_expand_skb_head_cloned;
1444 	unsigned int rx_expand_skb_head_defrag;
1445 	unsigned int rx_handlers_fragments;
1446 	unsigned int tx_status_drop;
1447 #define I802_DEBUG_INC(c) (c)++
1448 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1449 #define I802_DEBUG_INC(c) do { } while (0)
1450 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1451 
1452 
1453 	int total_ps_buffered; /* total number of all buffered unicast and
1454 				* multicast packets for power saving stations
1455 				*/
1456 
1457 	bool pspolling;
1458 	/*
1459 	 * PS can only be enabled when we have exactly one managed
1460 	 * interface (and monitors) in PS, this then points there.
1461 	 */
1462 	struct ieee80211_sub_if_data *ps_sdata;
1463 	struct work_struct dynamic_ps_enable_work;
1464 	struct work_struct dynamic_ps_disable_work;
1465 	struct timer_list dynamic_ps_timer;
1466 	struct notifier_block ifa_notifier;
1467 	struct notifier_block ifa6_notifier;
1468 
1469 	/*
1470 	 * The dynamic ps timeout configured from user space via WEXT -
1471 	 * this will override whatever chosen by mac80211 internally.
1472 	 */
1473 	int dynamic_ps_forced_timeout;
1474 
1475 	int user_power_level; /* in dBm, for all interfaces */
1476 
1477 	enum ieee80211_smps_mode smps_mode;
1478 
1479 	struct work_struct restart_work;
1480 
1481 #ifdef CONFIG_MAC80211_DEBUGFS
1482 	struct local_debugfsdentries {
1483 		struct dentry *rcdir;
1484 		struct dentry *keys;
1485 	} debugfs;
1486 	bool force_tx_status;
1487 #endif
1488 
1489 	/*
1490 	 * Remain-on-channel support
1491 	 */
1492 	struct delayed_work roc_work;
1493 	struct list_head roc_list;
1494 	struct work_struct hw_roc_start, hw_roc_done;
1495 	unsigned long hw_roc_start_time;
1496 	u64 roc_cookie_counter;
1497 
1498 	struct idr ack_status_frames;
1499 	spinlock_t ack_status_lock;
1500 
1501 	struct ieee80211_sub_if_data __rcu *p2p_sdata;
1502 
1503 	/* virtual monitor interface */
1504 	struct ieee80211_sub_if_data __rcu *monitor_sdata;
1505 	struct cfg80211_chan_def monitor_chandef;
1506 
1507 	/* extended capabilities provided by mac80211 */
1508 	u8 ext_capa[8];
1509 };
1510 
1511 static inline struct ieee80211_sub_if_data *
IEEE80211_DEV_TO_SUB_IF(const struct net_device * dev)1512 IEEE80211_DEV_TO_SUB_IF(const struct net_device *dev)
1513 {
1514 	return netdev_priv(dev);
1515 }
1516 
1517 static inline struct ieee80211_sub_if_data *
IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev * wdev)1518 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1519 {
1520 	return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1521 }
1522 
1523 static inline struct ieee80211_supported_band *
ieee80211_get_sband(struct ieee80211_sub_if_data * sdata)1524 ieee80211_get_sband(struct ieee80211_sub_if_data *sdata)
1525 {
1526 	struct ieee80211_local *local = sdata->local;
1527 	struct ieee80211_chanctx_conf *chanctx_conf;
1528 	enum nl80211_band band;
1529 
1530 	rcu_read_lock();
1531 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1532 
1533 	if (!chanctx_conf) {
1534 		rcu_read_unlock();
1535 		return NULL;
1536 	}
1537 
1538 	band = chanctx_conf->def.chan->band;
1539 	rcu_read_unlock();
1540 
1541 	return local->hw.wiphy->bands[band];
1542 }
1543 
1544 /* this struct holds the value parsing from channel switch IE  */
1545 struct ieee80211_csa_ie {
1546 	struct cfg80211_chan_def chandef;
1547 	u8 mode;
1548 	u8 count;
1549 	u8 ttl;
1550 	u16 pre_value;
1551 	u16 reason_code;
1552 	u32 max_switch_time;
1553 };
1554 
1555 /* Parsed Information Elements */
1556 struct ieee802_11_elems {
1557 	const u8 *ie_start;
1558 	size_t total_len;
1559 	u32 crc;
1560 
1561 	/* pointers to IEs */
1562 	const struct ieee80211_tdls_lnkie *lnk_id;
1563 	const struct ieee80211_ch_switch_timing *ch_sw_timing;
1564 	const u8 *ext_capab;
1565 	const u8 *ssid;
1566 	const u8 *supp_rates;
1567 	const u8 *ds_params;
1568 	const struct ieee80211_tim_ie *tim;
1569 	const u8 *rsn;
1570 	const u8 *rsnx;
1571 	const u8 *erp_info;
1572 	const u8 *ext_supp_rates;
1573 	const u8 *wmm_info;
1574 	const u8 *wmm_param;
1575 	const struct ieee80211_ht_cap *ht_cap_elem;
1576 	const struct ieee80211_ht_operation *ht_operation;
1577 	const struct ieee80211_vht_cap *vht_cap_elem;
1578 	const struct ieee80211_vht_operation *vht_operation;
1579 	const struct ieee80211_meshconf_ie *mesh_config;
1580 	const u8 *he_cap;
1581 	const struct ieee80211_he_operation *he_operation;
1582 	const struct ieee80211_he_spr *he_spr;
1583 	const struct ieee80211_mu_edca_param_set *mu_edca_param_set;
1584 	const struct ieee80211_he_6ghz_capa *he_6ghz_capa;
1585 	const struct ieee80211_tx_pwr_env *tx_pwr_env[IEEE80211_TPE_MAX_IE_COUNT];
1586 	const u8 *uora_element;
1587 	const u8 *mesh_id;
1588 	const u8 *peering;
1589 	const __le16 *awake_window;
1590 	const u8 *preq;
1591 	const u8 *prep;
1592 	const u8 *perr;
1593 	const struct ieee80211_rann_ie *rann;
1594 	const struct ieee80211_channel_sw_ie *ch_switch_ie;
1595 	const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1596 	const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1597 	const u8 *max_channel_switch_time;
1598 	const u8 *country_elem;
1599 	const u8 *pwr_constr_elem;
1600 	const u8 *cisco_dtpc_elem;
1601 	const struct ieee80211_timeout_interval_ie *timeout_int;
1602 	const u8 *opmode_notif;
1603 	const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1604 	struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1605 	const struct ieee80211_bss_max_idle_period_ie *max_idle_period_ie;
1606 	const struct ieee80211_multiple_bssid_configuration *mbssid_config_ie;
1607 	const struct ieee80211_bssid_index *bssid_index;
1608 	u8 max_bssid_indicator;
1609 	u8 dtim_count;
1610 	u8 dtim_period;
1611 	const struct ieee80211_addba_ext_ie *addba_ext_ie;
1612 	const struct ieee80211_s1g_cap *s1g_capab;
1613 	const struct ieee80211_s1g_oper_ie *s1g_oper;
1614 	const struct ieee80211_s1g_bcn_compat_ie *s1g_bcn_compat;
1615 	const struct ieee80211_aid_response_ie *aid_resp;
1616 	const struct ieee80211_eht_cap_elem *eht_cap;
1617 	const struct ieee80211_eht_operation *eht_operation;
1618 
1619 	/* length of them, respectively */
1620 	u8 ext_capab_len;
1621 	u8 ssid_len;
1622 	u8 supp_rates_len;
1623 	u8 tim_len;
1624 	u8 rsn_len;
1625 	u8 rsnx_len;
1626 	u8 ext_supp_rates_len;
1627 	u8 wmm_info_len;
1628 	u8 wmm_param_len;
1629 	u8 he_cap_len;
1630 	u8 mesh_id_len;
1631 	u8 peering_len;
1632 	u8 preq_len;
1633 	u8 prep_len;
1634 	u8 perr_len;
1635 	u8 country_elem_len;
1636 	u8 bssid_index_len;
1637 	u8 tx_pwr_env_len[IEEE80211_TPE_MAX_IE_COUNT];
1638 	u8 tx_pwr_env_num;
1639 	u8 eht_cap_len;
1640 
1641 	/* whether a parse error occurred while retrieving these elements */
1642 	bool parse_error;
1643 };
1644 
hw_to_local(struct ieee80211_hw * hw)1645 static inline struct ieee80211_local *hw_to_local(
1646 	struct ieee80211_hw *hw)
1647 {
1648 	return container_of(hw, struct ieee80211_local, hw);
1649 }
1650 
to_txq_info(struct ieee80211_txq * txq)1651 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1652 {
1653 	return container_of(txq, struct txq_info, txq);
1654 }
1655 
txq_has_queue(struct ieee80211_txq * txq)1656 static inline bool txq_has_queue(struct ieee80211_txq *txq)
1657 {
1658 	struct txq_info *txqi = to_txq_info(txq);
1659 
1660 	return !(skb_queue_empty(&txqi->frags) && !txqi->tin.backlog_packets);
1661 }
1662 
to_airtime_info(struct ieee80211_txq * txq)1663 static inline struct airtime_info *to_airtime_info(struct ieee80211_txq *txq)
1664 {
1665 	struct ieee80211_sub_if_data *sdata;
1666 	struct sta_info *sta;
1667 
1668 	if (txq->sta) {
1669 		sta = container_of(txq->sta, struct sta_info, sta);
1670 		return &sta->airtime[txq->ac];
1671 	}
1672 
1673 	sdata = vif_to_sdata(txq->vif);
1674 	return &sdata->airtime[txq->ac];
1675 }
1676 
1677 /* To avoid divisions in the fast path, we keep pre-computed reciprocals for
1678  * airtime weight calculations. There are two different weights to keep track
1679  * of: The per-station weight and the sum of weights per phy.
1680  *
1681  * For the per-station weights (kept in airtime_info below), we use 32-bit
1682  * reciprocals with a devisor of 2^19. This lets us keep the multiplications and
1683  * divisions for the station weights as 32-bit operations at the cost of a bit
1684  * of rounding error for high weights; but the choice of divisor keeps rounding
1685  * errors <10% for weights <2^15, assuming no more than 8ms of airtime is
1686  * reported at a time.
1687  *
1688  * For the per-phy sum of weights the values can get higher, so we use 64-bit
1689  * operations for those with a 32-bit divisor, which should avoid any
1690  * significant rounding errors.
1691  */
1692 #define IEEE80211_RECIPROCAL_DIVISOR_64 0x100000000ULL
1693 #define IEEE80211_RECIPROCAL_SHIFT_64 32
1694 #define IEEE80211_RECIPROCAL_DIVISOR_32 0x80000U
1695 #define IEEE80211_RECIPROCAL_SHIFT_32 19
1696 
airtime_weight_set(struct airtime_info * air_info,u16 weight)1697 static inline void airtime_weight_set(struct airtime_info *air_info, u16 weight)
1698 {
1699 	if (air_info->weight == weight)
1700 		return;
1701 
1702 	air_info->weight = weight;
1703 	if (weight) {
1704 		air_info->weight_reciprocal =
1705 			IEEE80211_RECIPROCAL_DIVISOR_32 / weight;
1706 	} else {
1707 		air_info->weight_reciprocal = 0;
1708 	}
1709 }
1710 
airtime_weight_sum_set(struct airtime_sched_info * air_sched,int weight_sum)1711 static inline void airtime_weight_sum_set(struct airtime_sched_info *air_sched,
1712 					  int weight_sum)
1713 {
1714 	if (air_sched->weight_sum == weight_sum)
1715 		return;
1716 
1717 	air_sched->weight_sum = weight_sum;
1718 	if (air_sched->weight_sum) {
1719 		air_sched->weight_sum_reciprocal = IEEE80211_RECIPROCAL_DIVISOR_64;
1720 		do_div(air_sched->weight_sum_reciprocal, air_sched->weight_sum);
1721 	} else {
1722 		air_sched->weight_sum_reciprocal = 0;
1723 	}
1724 }
1725 
1726 /* A problem when trying to enforce airtime fairness is that we want to divide
1727  * the airtime between the currently *active* stations. However, basing this on
1728  * the instantaneous queue state of stations doesn't work, as queues tend to
1729  * oscillate very quickly between empty and occupied, leading to the scheduler
1730  * thinking only a single station is active when deciding whether to allow
1731  * transmission (and thus not throttling correctly).
1732  *
1733  * To fix this we use a timer-based notion of activity: a station is considered
1734  * active if it has been scheduled within the last 100 ms; we keep a separate
1735  * list of all the stations considered active in this manner, and lazily update
1736  * the total weight of active stations from this list (filtering the stations in
1737  * the list by their 'last active' time).
1738  *
1739  * We add one additional safeguard to guard against stations that manage to get
1740  * scheduled every 100 ms but don't transmit a lot of data, and thus don't use
1741  * up any airtime. Such stations would be able to get priority for an extended
1742  * period of time if they do start transmitting at full capacity again, and so
1743  * we add an explicit maximum for how far behind a station is allowed to fall in
1744  * the virtual airtime domain. This limit is set to a relatively high value of
1745  * 20 ms because the main mechanism for catching up idle stations is the active
1746  * state as described above; i.e., the hard limit should only be hit in
1747  * pathological cases.
1748  */
1749 #define AIRTIME_ACTIVE_DURATION (100 * NSEC_PER_MSEC)
1750 #define AIRTIME_MAX_BEHIND 20000 /* 20 ms */
1751 
airtime_is_active(struct airtime_info * air_info,u64 now)1752 static inline bool airtime_is_active(struct airtime_info *air_info, u64 now)
1753 {
1754 	return air_info->last_scheduled >= now - AIRTIME_ACTIVE_DURATION;
1755 }
1756 
airtime_set_active(struct airtime_sched_info * air_sched,struct airtime_info * air_info,u64 now)1757 static inline void airtime_set_active(struct airtime_sched_info *air_sched,
1758 				      struct airtime_info *air_info, u64 now)
1759 {
1760 	air_info->last_scheduled = now;
1761 	air_sched->last_schedule_activity = now;
1762 	list_move_tail(&air_info->list, &air_sched->active_list);
1763 }
1764 
airtime_catchup_v_t(struct airtime_sched_info * air_sched,u64 v_t,u64 now)1765 static inline bool airtime_catchup_v_t(struct airtime_sched_info *air_sched,
1766 				       u64 v_t, u64 now)
1767 {
1768 	air_sched->v_t = v_t;
1769 	return true;
1770 }
1771 
init_airtime_info(struct airtime_info * air_info,struct airtime_sched_info * air_sched)1772 static inline void init_airtime_info(struct airtime_info *air_info,
1773 				     struct airtime_sched_info *air_sched)
1774 {
1775 	atomic_set(&air_info->aql_tx_pending, 0);
1776 	air_info->aql_limit_low = air_sched->aql_txq_limit_low;
1777 	air_info->aql_limit_high = air_sched->aql_txq_limit_high;
1778 	airtime_weight_set(air_info, IEEE80211_DEFAULT_AIRTIME_WEIGHT);
1779 	INIT_LIST_HEAD(&air_info->list);
1780 }
1781 
ieee80211_bssid_match(const u8 * raddr,const u8 * addr)1782 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1783 {
1784 	return ether_addr_equal(raddr, addr) ||
1785 	       is_broadcast_ether_addr(raddr);
1786 }
1787 
1788 static inline bool
ieee80211_have_rx_timestamp(struct ieee80211_rx_status * status)1789 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1790 {
1791 	WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1792 		     status->flag & RX_FLAG_MACTIME_END);
1793 	return !!(status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END |
1794 				  RX_FLAG_MACTIME_PLCP_START));
1795 }
1796 
1797 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata);
1798 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata);
1799 
1800 /* This function returns the number of multicast stations connected to this
1801  * interface. It returns -1 if that number is not tracked, that is for netdevs
1802  * not in AP or AP_VLAN mode or when using 4addr.
1803  */
1804 static inline int
ieee80211_vif_get_num_mcast_if(struct ieee80211_sub_if_data * sdata)1805 ieee80211_vif_get_num_mcast_if(struct ieee80211_sub_if_data *sdata)
1806 {
1807 	if (sdata->vif.type == NL80211_IFTYPE_AP)
1808 		return atomic_read(&sdata->u.ap.num_mcast_sta);
1809 	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
1810 		return atomic_read(&sdata->u.vlan.num_mcast_sta);
1811 	return -1;
1812 }
1813 
1814 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1815 				     struct ieee80211_rx_status *status,
1816 				     unsigned int mpdu_len,
1817 				     unsigned int mpdu_offset);
1818 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1819 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1820 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1821 				      u32 changed);
1822 void ieee80211_configure_filter(struct ieee80211_local *local);
1823 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1824 
1825 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local);
1826 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
1827 			     u64 *cookie, gfp_t gfp);
1828 
1829 void ieee80211_check_fast_rx(struct sta_info *sta);
1830 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1831 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1832 void ieee80211_clear_fast_rx(struct sta_info *sta);
1833 
1834 /* STA code */
1835 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1836 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1837 		       struct cfg80211_auth_request *req);
1838 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1839 			struct cfg80211_assoc_request *req);
1840 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1841 			 struct cfg80211_deauth_request *req);
1842 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1843 			   struct cfg80211_disassoc_request *req);
1844 void ieee80211_send_pspoll(struct ieee80211_local *local,
1845 			   struct ieee80211_sub_if_data *sdata);
1846 void ieee80211_recalc_ps(struct ieee80211_local *local);
1847 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1848 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1849 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1850 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1851 				  struct sk_buff *skb);
1852 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata,
1853 				 struct sk_buff *skb);
1854 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1855 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1856 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1857 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1858 				  __le16 fc, bool acked);
1859 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1860 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1861 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1862 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
1863 				   u8 reason, bool tx);
1864 
1865 /* IBSS code */
1866 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1867 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1868 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1869 			      const u8 *bssid, const u8 *addr, u32 supp_rates);
1870 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1871 			struct cfg80211_ibss_params *params);
1872 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1873 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1874 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1875 				   struct sk_buff *skb);
1876 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1877 			      struct cfg80211_csa_settings *csa_settings);
1878 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1879 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1880 
1881 /* OCB code */
1882 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1883 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1884 			     const u8 *bssid, const u8 *addr, u32 supp_rates);
1885 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1886 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1887 		       struct ocb_setup *setup);
1888 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1889 
1890 /* mesh code */
1891 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1892 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1893 				   struct sk_buff *skb);
1894 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1895 			      struct cfg80211_csa_settings *csa_settings);
1896 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1897 
1898 /* scan/BSS handling */
1899 void ieee80211_scan_work(struct work_struct *work);
1900 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1901 				const u8 *ssid, u8 ssid_len,
1902 				struct ieee80211_channel **channels,
1903 				unsigned int n_channels,
1904 				enum nl80211_bss_scan_width scan_width);
1905 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1906 			   struct cfg80211_scan_request *req);
1907 void ieee80211_scan_cancel(struct ieee80211_local *local);
1908 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1909 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1910 
1911 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1912 struct ieee80211_bss *
1913 ieee80211_bss_info_update(struct ieee80211_local *local,
1914 			  struct ieee80211_rx_status *rx_status,
1915 			  struct ieee80211_mgmt *mgmt,
1916 			  size_t len,
1917 			  struct ieee80211_channel *channel);
1918 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1919 			  struct ieee80211_bss *bss);
1920 
1921 /* scheduled scan handling */
1922 int
1923 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1924 				     struct cfg80211_sched_scan_request *req);
1925 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1926 				       struct cfg80211_sched_scan_request *req);
1927 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
1928 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1929 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1930 
1931 /* off-channel/mgmt-tx */
1932 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1933 void ieee80211_offchannel_return(struct ieee80211_local *local);
1934 void ieee80211_roc_setup(struct ieee80211_local *local);
1935 void ieee80211_start_next_roc(struct ieee80211_local *local);
1936 void ieee80211_roc_purge(struct ieee80211_local *local,
1937 			 struct ieee80211_sub_if_data *sdata);
1938 int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
1939 				struct ieee80211_channel *chan,
1940 				unsigned int duration, u64 *cookie);
1941 int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
1942 				       struct wireless_dev *wdev, u64 cookie);
1943 int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
1944 		      struct cfg80211_mgmt_tx_params *params, u64 *cookie);
1945 int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
1946 				  struct wireless_dev *wdev, u64 cookie);
1947 
1948 /* channel switch handling */
1949 void ieee80211_csa_finalize_work(struct work_struct *work);
1950 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1951 			     struct cfg80211_csa_settings *params);
1952 
1953 /* color change handling */
1954 void ieee80211_color_change_finalize_work(struct work_struct *work);
1955 
1956 /* interface handling */
1957 #define MAC80211_SUPPORTED_FEATURES_TX	(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
1958 					 NETIF_F_HW_CSUM | NETIF_F_SG | \
1959 					 NETIF_F_HIGHDMA | NETIF_F_GSO_SOFTWARE)
1960 #define MAC80211_SUPPORTED_FEATURES_RX	(NETIF_F_RXCSUM)
1961 #define MAC80211_SUPPORTED_FEATURES	(MAC80211_SUPPORTED_FEATURES_TX | \
1962 					 MAC80211_SUPPORTED_FEATURES_RX)
1963 
1964 int ieee80211_iface_init(void);
1965 void ieee80211_iface_exit(void);
1966 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1967 		     unsigned char name_assign_type,
1968 		     struct wireless_dev **new_wdev, enum nl80211_iftype type,
1969 		     struct vif_params *params);
1970 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1971 			     enum nl80211_iftype type);
1972 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1973 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1974 u32 ieee80211_idle_off(struct ieee80211_local *local);
1975 void ieee80211_recalc_idle(struct ieee80211_local *local);
1976 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1977 				    const int offset);
1978 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1979 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1980 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1981 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1982 
1983 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1984 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1985 			      bool update_bss);
1986 void ieee80211_recalc_offload(struct ieee80211_local *local);
1987 
ieee80211_sdata_running(struct ieee80211_sub_if_data * sdata)1988 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1989 {
1990 	return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1991 }
1992 
1993 /* tx handling */
1994 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1995 void ieee80211_tx_pending(struct tasklet_struct *t);
1996 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1997 					 struct net_device *dev);
1998 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1999 				       struct net_device *dev);
2000 netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
2001 					    struct net_device *dev);
2002 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
2003 				  struct net_device *dev,
2004 				  u32 info_flags,
2005 				  u32 ctrl_flags,
2006 				  u64 *cookie);
2007 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
2008 			      struct sk_buff_head *skbs);
2009 struct sk_buff *
2010 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
2011 			      struct sk_buff *skb, u32 info_flags);
2012 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
2013 			  struct ieee80211_supported_band *sband,
2014 			  int retry_count, int shift, bool send_to_cooked,
2015 			  struct ieee80211_tx_status *status);
2016 
2017 void ieee80211_check_fast_xmit(struct sta_info *sta);
2018 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
2019 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
2020 void ieee80211_clear_fast_xmit(struct sta_info *sta);
2021 int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
2022 			      const u8 *buf, size_t len,
2023 			      const u8 *dest, __be16 proto, bool unencrypted,
2024 			      u64 *cookie);
2025 int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
2026 			      const u8 *buf, size_t len);
2027 void ieee80211_resort_txq(struct ieee80211_hw *hw,
2028 			  struct ieee80211_txq *txq);
2029 void ieee80211_unschedule_txq(struct ieee80211_hw *hw,
2030 			      struct ieee80211_txq *txq,
2031 			      bool purge);
2032 void ieee80211_update_airtime_weight(struct ieee80211_local *local,
2033 				     struct airtime_sched_info *air_sched,
2034 				     u64 now, bool force);
2035 
2036 /* HT */
2037 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
2038 				     struct ieee80211_sta_ht_cap *ht_cap);
2039 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
2040 				       struct ieee80211_supported_band *sband,
2041 				       const struct ieee80211_ht_cap *ht_cap_ie,
2042 				       struct sta_info *sta);
2043 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
2044 			  const u8 *da, u16 tid,
2045 			  u16 initiator, u16 reason_code);
2046 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
2047 			       enum ieee80211_smps_mode smps, const u8 *da,
2048 			       const u8 *bssid);
2049 void ieee80211_request_smps_ap_work(struct work_struct *work);
2050 void ieee80211_request_smps_mgd_work(struct work_struct *work);
2051 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2052 				   enum ieee80211_smps_mode smps_mode_new);
2053 
2054 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
2055 				     u16 initiator, u16 reason, bool stop);
2056 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
2057 				    u16 initiator, u16 reason, bool stop);
2058 void ___ieee80211_start_rx_ba_session(struct sta_info *sta,
2059 				      u8 dialog_token, u16 timeout,
2060 				      u16 start_seq_num, u16 ba_policy, u16 tid,
2061 				      u16 buf_size, bool tx, bool auto_seq,
2062 				      const struct ieee80211_addba_ext_ie *addbaext);
2063 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
2064 					 enum ieee80211_agg_stop_reason reason);
2065 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
2066 			     struct sta_info *sta,
2067 			     struct ieee80211_mgmt *mgmt, size_t len);
2068 void ieee80211_process_addba_resp(struct ieee80211_local *local,
2069 				  struct sta_info *sta,
2070 				  struct ieee80211_mgmt *mgmt,
2071 				  size_t len);
2072 void ieee80211_process_addba_request(struct ieee80211_local *local,
2073 				     struct sta_info *sta,
2074 				     struct ieee80211_mgmt *mgmt,
2075 				     size_t len);
2076 
2077 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
2078 				   enum ieee80211_agg_stop_reason reason);
2079 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
2080 				    enum ieee80211_agg_stop_reason reason);
2081 void ieee80211_start_tx_ba_cb(struct sta_info *sta, int tid,
2082 			      struct tid_ampdu_tx *tid_tx);
2083 void ieee80211_stop_tx_ba_cb(struct sta_info *sta, int tid,
2084 			     struct tid_ampdu_tx *tid_tx);
2085 void ieee80211_ba_session_work(struct work_struct *work);
2086 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
2087 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
2088 
2089 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
2090 enum nl80211_smps_mode
2091 ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps);
2092 
2093 /* VHT */
2094 void
2095 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
2096 				    struct ieee80211_supported_band *sband,
2097 				    const struct ieee80211_vht_cap *vht_cap_ie,
2098 				    struct sta_info *sta);
2099 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
2100 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
2101 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
2102 enum ieee80211_sta_rx_bandwidth
2103 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
2104 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta);
2105 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
2106 				 struct ieee80211_mgmt *mgmt);
2107 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
2108                                   struct sta_info *sta, u8 opmode,
2109 				  enum nl80211_band band);
2110 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
2111 				 struct sta_info *sta, u8 opmode,
2112 				 enum nl80211_band band);
2113 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
2114 				      struct ieee80211_sta_vht_cap *vht_cap);
2115 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
2116 				     u16 vht_mask[NL80211_VHT_NSS_MAX]);
2117 enum nl80211_chan_width
2118 ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta);
2119 
2120 /* HE */
2121 void
2122 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
2123 				  struct ieee80211_supported_band *sband,
2124 				  const u8 *he_cap_ie, u8 he_cap_len,
2125 				  const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
2126 				  struct sta_info *sta);
2127 void
2128 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
2129 				const struct ieee80211_he_spr *he_spr_ie_elem);
2130 
2131 void
2132 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
2133 			const struct ieee80211_he_operation *he_op_ie_elem);
2134 
2135 /* S1G */
2136 void ieee80211_s1g_sta_rate_init(struct sta_info *sta);
2137 bool ieee80211_s1g_is_twt_setup(struct sk_buff *skb);
2138 void ieee80211_s1g_rx_twt_action(struct ieee80211_sub_if_data *sdata,
2139 				 struct sk_buff *skb);
2140 void ieee80211_s1g_status_twt_action(struct ieee80211_sub_if_data *sdata,
2141 				     struct sk_buff *skb);
2142 
2143 /* Spectrum management */
2144 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
2145 				       struct ieee80211_mgmt *mgmt,
2146 				       size_t len);
2147 /**
2148  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
2149  * @sdata: the sdata of the interface which has received the frame
2150  * @elems: parsed 802.11 elements received with the frame
2151  * @current_band: indicates the current band
2152  * @vht_cap_info: VHT capabilities of the transmitter
2153  * @sta_flags: contains information about own capabilities and restrictions
2154  *	to decide which channel switch announcements can be accepted. Only the
2155  *	following subset of &enum ieee80211_sta_flags are evaluated:
2156  *	%IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
2157  *	%IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
2158  *	%IEEE80211_STA_DISABLE_160MHZ.
2159  * @bssid: the currently connected bssid (for reporting)
2160  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
2161 	All of them will be filled with if success only.
2162  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
2163  */
2164 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
2165 				 struct ieee802_11_elems *elems,
2166 				 enum nl80211_band current_band,
2167 				 u32 vht_cap_info,
2168 				 u32 sta_flags, u8 *bssid,
2169 				 struct ieee80211_csa_ie *csa_ie);
2170 
2171 /* Suspend/resume and hw reconfiguration */
2172 int ieee80211_reconfig(struct ieee80211_local *local);
2173 void ieee80211_stop_device(struct ieee80211_local *local);
2174 
2175 int __ieee80211_suspend(struct ieee80211_hw *hw,
2176 			struct cfg80211_wowlan *wowlan);
2177 
__ieee80211_resume(struct ieee80211_hw * hw)2178 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
2179 {
2180 	struct ieee80211_local *local = hw_to_local(hw);
2181 
2182 	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
2183 	     !test_bit(SCAN_COMPLETED, &local->scanning),
2184 		"%s: resume with hardware scan still in progress\n",
2185 		wiphy_name(hw->wiphy));
2186 
2187 	return ieee80211_reconfig(hw_to_local(hw));
2188 }
2189 
2190 /* utility functions/constants */
2191 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
2192 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
2193 			     int rate, int erp, int short_preamble,
2194 			     int shift);
2195 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
2196 					   struct ieee80211_tx_queue_params *qparam,
2197 					   int ac);
2198 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
2199 			       bool bss_notify, bool enable_qos);
2200 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
2201 		    struct sta_info *sta, struct sk_buff *skb);
2202 
2203 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
2204 				 struct sk_buff *skb, int tid,
2205 				 enum nl80211_band band);
2206 
2207 /* sta_out needs to be checked for ERR_PTR() before using */
2208 int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2209 			    struct sk_buff *skb,
2210 			    struct sta_info **sta_out);
2211 
2212 static inline void
ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,int tid,enum nl80211_band band)2213 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
2214 			  struct sk_buff *skb, int tid,
2215 			  enum nl80211_band band)
2216 {
2217 	rcu_read_lock();
2218 	__ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
2219 	rcu_read_unlock();
2220 }
2221 
ieee80211_tx_skb_tid(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb,int tid)2222 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
2223 					struct sk_buff *skb, int tid)
2224 {
2225 	struct ieee80211_chanctx_conf *chanctx_conf;
2226 
2227 	rcu_read_lock();
2228 	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
2229 	if (WARN_ON(!chanctx_conf)) {
2230 		rcu_read_unlock();
2231 		kfree_skb(skb);
2232 		return;
2233 	}
2234 
2235 	__ieee80211_tx_skb_tid_band(sdata, skb, tid,
2236 				    chanctx_conf->def.chan->band);
2237 	rcu_read_unlock();
2238 }
2239 
ieee80211_tx_skb(struct ieee80211_sub_if_data * sdata,struct sk_buff * skb)2240 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
2241 				    struct sk_buff *skb)
2242 {
2243 	/* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
2244 	ieee80211_tx_skb_tid(sdata, skb, 7);
2245 }
2246 
2247 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len,
2248 						    bool action,
2249 						    u64 filter, u32 crc,
2250 						    const u8 *transmitter_bssid,
2251 						    const u8 *bss_bssid);
2252 static inline struct ieee802_11_elems *
ieee802_11_parse_elems(const u8 * start,size_t len,bool action,const u8 * transmitter_bssid,const u8 * bss_bssid)2253 ieee802_11_parse_elems(const u8 *start, size_t len, bool action,
2254 		       const u8 *transmitter_bssid,
2255 		       const u8 *bss_bssid)
2256 {
2257 	return ieee802_11_parse_elems_crc(start, len, action, 0, 0,
2258 					  transmitter_bssid, bss_bssid);
2259 }
2260 
2261 
2262 extern const int ieee802_1d_to_ac[8];
2263 
ieee80211_ac_from_tid(int tid)2264 static inline int ieee80211_ac_from_tid(int tid)
2265 {
2266 	return ieee802_1d_to_ac[tid & 7];
2267 }
2268 
2269 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
2270 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
2271 void ieee80211_dynamic_ps_timer(struct timer_list *t);
2272 void ieee80211_send_nullfunc(struct ieee80211_local *local,
2273 			     struct ieee80211_sub_if_data *sdata,
2274 			     bool powersave);
2275 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
2276 				   struct ieee80211_sub_if_data *sdata);
2277 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
2278 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
2279 
2280 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
2281 				     unsigned long queues,
2282 				     enum queue_stop_reason reason,
2283 				     bool refcounted);
2284 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
2285 			       struct ieee80211_sub_if_data *sdata,
2286 			       enum queue_stop_reason reason);
2287 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
2288 			       struct ieee80211_sub_if_data *sdata,
2289 			       enum queue_stop_reason reason);
2290 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
2291 				     unsigned long queues,
2292 				     enum queue_stop_reason reason,
2293 				     bool refcounted);
2294 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
2295 				    enum queue_stop_reason reason,
2296 				    bool refcounted);
2297 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
2298 				    enum queue_stop_reason reason,
2299 				    bool refcounted);
2300 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
2301 void ieee80211_add_pending_skb(struct ieee80211_local *local,
2302 			       struct sk_buff *skb);
2303 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
2304 				struct sk_buff_head *skbs);
2305 void ieee80211_flush_queues(struct ieee80211_local *local,
2306 			    struct ieee80211_sub_if_data *sdata, bool drop);
2307 void __ieee80211_flush_queues(struct ieee80211_local *local,
2308 			      struct ieee80211_sub_if_data *sdata,
2309 			      unsigned int queues, bool drop);
2310 
ieee80211_can_run_worker(struct ieee80211_local * local)2311 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
2312 {
2313 	/*
2314 	 * It's unsafe to try to do any work during reconfigure flow.
2315 	 * When the flow ends the work will be requeued.
2316 	 */
2317 	if (local->in_reconfig)
2318 		return false;
2319 
2320 	/*
2321 	 * If quiescing is set, we are racing with __ieee80211_suspend.
2322 	 * __ieee80211_suspend flushes the workers after setting quiescing,
2323 	 * and we check quiescing / suspended before enqueing new workers.
2324 	 * We should abort the worker to avoid the races below.
2325 	 */
2326 	if (local->quiescing)
2327 		return false;
2328 
2329 	/*
2330 	 * We might already be suspended if the following scenario occurs:
2331 	 * __ieee80211_suspend		Control path
2332 	 *
2333 	 *				if (local->quiescing)
2334 	 *					return;
2335 	 * local->quiescing = true;
2336 	 * flush_workqueue();
2337 	 *				queue_work(...);
2338 	 * local->suspended = true;
2339 	 * local->quiescing = false;
2340 	 *				worker starts running...
2341 	 */
2342 	if (local->suspended)
2343 		return false;
2344 
2345 	return true;
2346 }
2347 
2348 int ieee80211_txq_setup_flows(struct ieee80211_local *local);
2349 void ieee80211_txq_set_params(struct ieee80211_local *local);
2350 void ieee80211_txq_teardown_flows(struct ieee80211_local *local);
2351 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
2352 			struct sta_info *sta,
2353 			struct txq_info *txq, int tid);
2354 void ieee80211_txq_purge(struct ieee80211_local *local,
2355 			 struct txq_info *txqi);
2356 void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
2357 			       struct ieee80211_sub_if_data *sdata);
2358 void ieee80211_fill_txq_stats(struct cfg80211_txq_stats *txqstats,
2359 			      struct txq_info *txqi);
2360 void ieee80211_wake_txqs(struct tasklet_struct *t);
2361 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
2362 			 u16 transaction, u16 auth_alg, u16 status,
2363 			 const u8 *extra, size_t extra_len, const u8 *bssid,
2364 			 const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
2365 			 u32 tx_flags);
2366 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
2367 				    const u8 *da, const u8 *bssid,
2368 				    u16 stype, u16 reason,
2369 				    bool send_frame, u8 *frame_buf);
2370 
2371 enum {
2372 	IEEE80211_PROBE_FLAG_DIRECTED		= BIT(0),
2373 	IEEE80211_PROBE_FLAG_MIN_CONTENT	= BIT(1),
2374 	IEEE80211_PROBE_FLAG_RANDOM_SN		= BIT(2),
2375 };
2376 
2377 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2378 			     size_t buffer_len,
2379 			     struct ieee80211_scan_ies *ie_desc,
2380 			     const u8 *ie, size_t ie_len,
2381 			     u8 bands_used, u32 *rate_masks,
2382 			     struct cfg80211_chan_def *chandef,
2383 			     u32 flags);
2384 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2385 					  const u8 *src, const u8 *dst,
2386 					  u32 ratemask,
2387 					  struct ieee80211_channel *chan,
2388 					  const u8 *ssid, size_t ssid_len,
2389 					  const u8 *ie, size_t ie_len,
2390 					  u32 flags);
2391 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2392 			    struct ieee802_11_elems *elems,
2393 			    enum nl80211_band band, u32 *basic_rates);
2394 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2395 				 enum ieee80211_smps_mode smps_mode);
2396 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
2397 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
2398 
2399 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
2400 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2401 			      u16 cap);
2402 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2403 			       const struct cfg80211_chan_def *chandef,
2404 			       u16 prot_mode, bool rifs_mode);
2405 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2406 				   const struct cfg80211_chan_def *chandef);
2407 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2408 			       u32 cap);
2409 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2410 				const struct cfg80211_chan_def *chandef);
2411 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
2412 u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
2413 			      const struct ieee80211_sta_he_cap *he_cap,
2414 			      u8 *end);
2415 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2416 				    struct sk_buff *skb);
2417 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef);
2418 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2419 			     const struct ieee80211_supported_band *sband,
2420 			     const u8 *srates, int srates_len, u32 *rates);
2421 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2422 			    struct sk_buff *skb, bool need_basic,
2423 			    enum nl80211_band band);
2424 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2425 				struct sk_buff *skb, bool need_basic,
2426 				enum nl80211_band band);
2427 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
2428 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
2429 				struct ieee80211_sta_s1g_cap *caps,
2430 				struct sk_buff *skb);
2431 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
2432 				  struct sk_buff *skb);
2433 
2434 /* channel management */
2435 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2436 			       struct cfg80211_chan_def *chandef);
2437 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
2438 				const struct ieee80211_vht_operation *oper,
2439 				const struct ieee80211_ht_operation *htop,
2440 				struct cfg80211_chan_def *chandef);
2441 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
2442 				    const struct ieee80211_he_operation *he_oper,
2443 				    const struct ieee80211_eht_operation *eht_oper,
2444 				    struct cfg80211_chan_def *chandef);
2445 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
2446 				struct cfg80211_chan_def *chandef);
2447 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
2448 
2449 int __must_check
2450 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
2451 			  const struct cfg80211_chan_def *chandef,
2452 			  enum ieee80211_chanctx_mode mode);
2453 int __must_check
2454 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
2455 			      const struct cfg80211_chan_def *chandef,
2456 			      enum ieee80211_chanctx_mode mode,
2457 			      bool radar_required);
2458 int __must_check
2459 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2460 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2461 
2462 int __must_check
2463 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2464 			       const struct cfg80211_chan_def *chandef,
2465 			       u32 *changed);
2466 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2467 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2468 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2469 					 bool clear);
2470 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2471 			       struct ieee80211_chanctx *ctx);
2472 
2473 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2474 				   struct ieee80211_chanctx *chanctx);
2475 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2476 				      struct ieee80211_chanctx *ctx);
2477 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2478 
2479 void ieee80211_dfs_cac_timer(unsigned long data);
2480 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2481 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2482 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2483 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2484 			      struct cfg80211_csa_settings *csa_settings);
2485 
2486 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2487 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2488 const struct ieee80211_cipher_scheme *
2489 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2490 		 enum nl80211_iftype iftype);
2491 int ieee80211_cs_headroom(struct ieee80211_local *local,
2492 			  struct cfg80211_crypto_settings *crypto,
2493 			  enum nl80211_iftype iftype);
2494 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2495 			   struct ieee80211_sub_if_data *sdata);
2496 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2497 				 const struct cfg80211_chan_def *chandef,
2498 				 enum ieee80211_chanctx_mode chanmode,
2499 				 u8 radar_detect);
2500 int ieee80211_max_num_channels(struct ieee80211_local *local);
2501 void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
2502 				       struct ieee80211_chanctx *ctx);
2503 
2504 /* TDLS */
2505 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2506 			const u8 *peer, u8 action_code, u8 dialog_token,
2507 			u16 status_code, u32 peer_capability,
2508 			bool initiator, const u8 *extra_ies,
2509 			size_t extra_ies_len);
2510 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2511 			const u8 *peer, enum nl80211_tdls_operation oper);
2512 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2513 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2514 				  const u8 *addr, u8 oper_class,
2515 				  struct cfg80211_chan_def *chandef);
2516 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2517 					  struct net_device *dev,
2518 					  const u8 *addr);
2519 void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata);
2520 void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
2521 				      const u8 *peer, u16 reason);
2522 void
2523 ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2524 				      struct sk_buff *skb);
2525 
2526 
2527 const char *ieee80211_get_reason_code_string(u16 reason_code);
2528 u16 ieee80211_encode_usf(int val);
2529 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
2530 			enum nl80211_iftype type);
2531 
2532 extern const struct ethtool_ops ieee80211_ethtool_ops;
2533 
2534 u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
2535 				       struct ieee80211_vif *vif,
2536 				       struct ieee80211_sta *pubsta,
2537 				       int len, bool ampdu);
2538 #ifdef CONFIG_MAC80211_NOINLINE
2539 #define debug_noinline noinline
2540 #else
2541 #define debug_noinline
2542 #endif
2543 
2544 void ieee80211_init_frag_cache(struct ieee80211_fragment_cache *cache);
2545 void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);
2546 
2547 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
2548 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
2549 			       const struct ieee80211_sta_he_cap *he_cap,
2550 			       const struct ieee80211_sta_eht_cap *eht_cap,
2551 			       u8 *end);
2552 
2553 void
2554 ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
2555 				    struct ieee80211_supported_band *sband,
2556 				    const u8 *he_cap_ie, u8 he_cap_len,
2557 				    const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
2558 				    u8 eht_cap_len, struct sta_info *sta);
2559 #endif /* IEEE80211_I_H */
2560