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