xref: /openbmc/linux/include/net/bluetooth/hci_core.h (revision bbb774d9)
1 /*
2    BlueZ - Bluetooth protocol stack for Linux
3    Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 
5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6 
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License version 2 as
9    published by the Free Software Foundation;
10 
11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 
20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22    SOFTWARE IS DISCLAIMED.
23 */
24 
25 #ifndef __HCI_CORE_H
26 #define __HCI_CORE_H
27 
28 #include <linux/idr.h>
29 #include <linux/leds.h>
30 #include <linux/rculist.h>
31 
32 #include <net/bluetooth/hci.h>
33 #include <net/bluetooth/hci_sync.h>
34 #include <net/bluetooth/hci_sock.h>
35 
36 /* HCI priority */
37 #define HCI_PRIO_MAX	7
38 
39 /* HCI maximum id value */
40 #define HCI_MAX_ID 10000
41 
42 /* HCI Core structures */
43 struct inquiry_data {
44 	bdaddr_t	bdaddr;
45 	__u8		pscan_rep_mode;
46 	__u8		pscan_period_mode;
47 	__u8		pscan_mode;
48 	__u8		dev_class[3];
49 	__le16		clock_offset;
50 	__s8		rssi;
51 	__u8		ssp_mode;
52 };
53 
54 struct inquiry_entry {
55 	struct list_head	all;		/* inq_cache.all */
56 	struct list_head	list;		/* unknown or resolve */
57 	enum {
58 		NAME_NOT_KNOWN,
59 		NAME_NEEDED,
60 		NAME_PENDING,
61 		NAME_KNOWN,
62 	} name_state;
63 	__u32			timestamp;
64 	struct inquiry_data	data;
65 };
66 
67 struct discovery_state {
68 	int			type;
69 	enum {
70 		DISCOVERY_STOPPED,
71 		DISCOVERY_STARTING,
72 		DISCOVERY_FINDING,
73 		DISCOVERY_RESOLVING,
74 		DISCOVERY_STOPPING,
75 	} state;
76 	struct list_head	all;	/* All devices found during inquiry */
77 	struct list_head	unknown;	/* Name state not known */
78 	struct list_head	resolve;	/* Name needs to be resolved */
79 	__u32			timestamp;
80 	bdaddr_t		last_adv_addr;
81 	u8			last_adv_addr_type;
82 	s8			last_adv_rssi;
83 	u32			last_adv_flags;
84 	u8			last_adv_data[HCI_MAX_AD_LENGTH];
85 	u8			last_adv_data_len;
86 	bool			report_invalid_rssi;
87 	bool			result_filtering;
88 	bool			limited;
89 	s8			rssi;
90 	u16			uuid_count;
91 	u8			(*uuids)[16];
92 	unsigned long		scan_start;
93 	unsigned long		scan_duration;
94 	unsigned long		name_resolve_timeout;
95 };
96 
97 #define SUSPEND_NOTIFIER_TIMEOUT	msecs_to_jiffies(2000) /* 2 seconds */
98 
99 enum suspend_tasks {
100 	SUSPEND_PAUSE_DISCOVERY,
101 	SUSPEND_UNPAUSE_DISCOVERY,
102 
103 	SUSPEND_PAUSE_ADVERTISING,
104 	SUSPEND_UNPAUSE_ADVERTISING,
105 
106 	SUSPEND_SCAN_DISABLE,
107 	SUSPEND_SCAN_ENABLE,
108 	SUSPEND_DISCONNECTING,
109 
110 	SUSPEND_POWERING_DOWN,
111 
112 	SUSPEND_PREPARE_NOTIFIER,
113 
114 	SUSPEND_SET_ADV_FILTER,
115 	__SUSPEND_NUM_TASKS
116 };
117 
118 enum suspended_state {
119 	BT_RUNNING = 0,
120 	BT_SUSPEND_DISCONNECT,
121 	BT_SUSPEND_CONFIGURE_WAKE,
122 };
123 
124 struct hci_conn_hash {
125 	struct list_head list;
126 	unsigned int     acl_num;
127 	unsigned int     amp_num;
128 	unsigned int     sco_num;
129 	unsigned int     iso_num;
130 	unsigned int     le_num;
131 	unsigned int     le_num_peripheral;
132 };
133 
134 struct bdaddr_list {
135 	struct list_head list;
136 	bdaddr_t bdaddr;
137 	u8 bdaddr_type;
138 };
139 
140 struct codec_list {
141 	struct list_head list;
142 	u8	id;
143 	__u16	cid;
144 	__u16	vid;
145 	u8	transport;
146 	u8	num_caps;
147 	u32	len;
148 	struct hci_codec_caps caps[];
149 };
150 
151 struct bdaddr_list_with_irk {
152 	struct list_head list;
153 	bdaddr_t bdaddr;
154 	u8 bdaddr_type;
155 	u8 peer_irk[16];
156 	u8 local_irk[16];
157 };
158 
159 /* Bitmask of connection flags */
160 enum hci_conn_flags {
161 	HCI_CONN_FLAG_REMOTE_WAKEUP = 1,
162 	HCI_CONN_FLAG_DEVICE_PRIVACY = 2,
163 };
164 typedef u8 hci_conn_flags_t;
165 
166 struct bdaddr_list_with_flags {
167 	struct list_head list;
168 	bdaddr_t bdaddr;
169 	u8 bdaddr_type;
170 	hci_conn_flags_t flags;
171 };
172 
173 struct bt_uuid {
174 	struct list_head list;
175 	u8 uuid[16];
176 	u8 size;
177 	u8 svc_hint;
178 };
179 
180 struct blocked_key {
181 	struct list_head list;
182 	struct rcu_head rcu;
183 	u8 type;
184 	u8 val[16];
185 };
186 
187 struct smp_csrk {
188 	bdaddr_t bdaddr;
189 	u8 bdaddr_type;
190 	u8 type;
191 	u8 val[16];
192 };
193 
194 struct smp_ltk {
195 	struct list_head list;
196 	struct rcu_head rcu;
197 	bdaddr_t bdaddr;
198 	u8 bdaddr_type;
199 	u8 authenticated;
200 	u8 type;
201 	u8 enc_size;
202 	__le16 ediv;
203 	__le64 rand;
204 	u8 val[16];
205 };
206 
207 struct smp_irk {
208 	struct list_head list;
209 	struct rcu_head rcu;
210 	bdaddr_t rpa;
211 	bdaddr_t bdaddr;
212 	u8 addr_type;
213 	u8 val[16];
214 };
215 
216 struct link_key {
217 	struct list_head list;
218 	struct rcu_head rcu;
219 	bdaddr_t bdaddr;
220 	u8 type;
221 	u8 val[HCI_LINK_KEY_SIZE];
222 	u8 pin_len;
223 };
224 
225 struct oob_data {
226 	struct list_head list;
227 	bdaddr_t bdaddr;
228 	u8 bdaddr_type;
229 	u8 present;
230 	u8 hash192[16];
231 	u8 rand192[16];
232 	u8 hash256[16];
233 	u8 rand256[16];
234 };
235 
236 struct adv_info {
237 	struct list_head list;
238 	bool	enabled;
239 	bool	pending;
240 	bool	periodic;
241 	__u8	instance;
242 	__u32	flags;
243 	__u16	timeout;
244 	__u16	remaining_time;
245 	__u16	duration;
246 	__u16	adv_data_len;
247 	__u8	adv_data[HCI_MAX_EXT_AD_LENGTH];
248 	bool	adv_data_changed;
249 	__u16	scan_rsp_len;
250 	__u8	scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
251 	bool	scan_rsp_changed;
252 	__u16	per_adv_data_len;
253 	__u8	per_adv_data[HCI_MAX_PER_AD_LENGTH];
254 	__s8	tx_power;
255 	__u32   min_interval;
256 	__u32   max_interval;
257 	bdaddr_t	random_addr;
258 	bool 		rpa_expired;
259 	struct delayed_work	rpa_expired_cb;
260 };
261 
262 #define HCI_MAX_ADV_INSTANCES		5
263 #define HCI_DEFAULT_ADV_DURATION	2
264 
265 #define HCI_ADV_TX_POWER_NO_PREFERENCE 0x7F
266 
267 #define DATA_CMP(_d1, _l1, _d2, _l2) \
268 	(_l1 == _l2 ? memcmp(_d1, _d2, _l1) : _l1 - _l2)
269 
270 #define ADV_DATA_CMP(_adv, _data, _len) \
271 	DATA_CMP((_adv)->adv_data, (_adv)->adv_data_len, _data, _len)
272 
273 #define SCAN_RSP_CMP(_adv, _data, _len) \
274 	DATA_CMP((_adv)->scan_rsp_data, (_adv)->scan_rsp_len, _data, _len)
275 
276 struct monitored_device {
277 	struct list_head list;
278 
279 	bdaddr_t bdaddr;
280 	__u8     addr_type;
281 	__u16    handle;
282 	bool     notified;
283 };
284 
285 struct adv_pattern {
286 	struct list_head list;
287 	__u8 ad_type;
288 	__u8 offset;
289 	__u8 length;
290 	__u8 value[HCI_MAX_AD_LENGTH];
291 };
292 
293 struct adv_rssi_thresholds {
294 	__s8 low_threshold;
295 	__s8 high_threshold;
296 	__u16 low_threshold_timeout;
297 	__u16 high_threshold_timeout;
298 	__u8 sampling_period;
299 };
300 
301 struct adv_monitor {
302 	struct list_head patterns;
303 	struct adv_rssi_thresholds rssi;
304 	__u16		handle;
305 
306 	enum {
307 		ADV_MONITOR_STATE_NOT_REGISTERED,
308 		ADV_MONITOR_STATE_REGISTERED,
309 		ADV_MONITOR_STATE_OFFLOADED
310 	} state;
311 };
312 
313 #define HCI_MIN_ADV_MONITOR_HANDLE		1
314 #define HCI_MAX_ADV_MONITOR_NUM_HANDLES		32
315 #define HCI_MAX_ADV_MONITOR_NUM_PATTERNS	16
316 #define HCI_ADV_MONITOR_EXT_NONE		1
317 #define HCI_ADV_MONITOR_EXT_MSFT		2
318 
319 #define HCI_MAX_SHORT_NAME_LENGTH	10
320 
321 #define HCI_CONN_HANDLE_UNSET		0xffff
322 #define HCI_CONN_HANDLE_MAX		0x0eff
323 
324 /* Min encryption key size to match with SMP */
325 #define HCI_MIN_ENC_KEY_SIZE		7
326 
327 /* Default LE RPA expiry time, 15 minutes */
328 #define HCI_DEFAULT_RPA_TIMEOUT		(15 * 60)
329 
330 /* Default min/max age of connection information (1s/3s) */
331 #define DEFAULT_CONN_INFO_MIN_AGE	1000
332 #define DEFAULT_CONN_INFO_MAX_AGE	3000
333 /* Default authenticated payload timeout 30s */
334 #define DEFAULT_AUTH_PAYLOAD_TIMEOUT   0x0bb8
335 
336 struct amp_assoc {
337 	__u16	len;
338 	__u16	offset;
339 	__u16	rem_len;
340 	__u16	len_so_far;
341 	__u8	data[HCI_MAX_AMP_ASSOC_SIZE];
342 };
343 
344 #define HCI_MAX_PAGES	3
345 
346 struct hci_dev {
347 	struct list_head list;
348 	struct mutex	lock;
349 
350 	char		name[8];
351 	unsigned long	flags;
352 	__u16		id;
353 	__u8		bus;
354 	__u8		dev_type;
355 	bdaddr_t	bdaddr;
356 	bdaddr_t	setup_addr;
357 	bdaddr_t	public_addr;
358 	bdaddr_t	random_addr;
359 	bdaddr_t	static_addr;
360 	__u8		adv_addr_type;
361 	__u8		dev_name[HCI_MAX_NAME_LENGTH];
362 	__u8		short_name[HCI_MAX_SHORT_NAME_LENGTH];
363 	__u8		eir[HCI_MAX_EIR_LENGTH];
364 	__u16		appearance;
365 	__u8		dev_class[3];
366 	__u8		major_class;
367 	__u8		minor_class;
368 	__u8		max_page;
369 	__u8		features[HCI_MAX_PAGES][8];
370 	__u8		le_features[8];
371 	__u8		le_accept_list_size;
372 	__u8		le_resolv_list_size;
373 	__u8		le_num_of_adv_sets;
374 	__u8		le_states[8];
375 	__u8		commands[64];
376 	__u8		hci_ver;
377 	__u16		hci_rev;
378 	__u8		lmp_ver;
379 	__u16		manufacturer;
380 	__u16		lmp_subver;
381 	__u16		voice_setting;
382 	__u8		num_iac;
383 	__u16		stored_max_keys;
384 	__u16		stored_num_keys;
385 	__u8		io_capability;
386 	__s8		inq_tx_power;
387 	__u8		err_data_reporting;
388 	__u16		page_scan_interval;
389 	__u16		page_scan_window;
390 	__u8		page_scan_type;
391 	__u8		le_adv_channel_map;
392 	__u16		le_adv_min_interval;
393 	__u16		le_adv_max_interval;
394 	__u8		le_scan_type;
395 	__u16		le_scan_interval;
396 	__u16		le_scan_window;
397 	__u16		le_scan_int_suspend;
398 	__u16		le_scan_window_suspend;
399 	__u16		le_scan_int_discovery;
400 	__u16		le_scan_window_discovery;
401 	__u16		le_scan_int_adv_monitor;
402 	__u16		le_scan_window_adv_monitor;
403 	__u16		le_scan_int_connect;
404 	__u16		le_scan_window_connect;
405 	__u16		le_conn_min_interval;
406 	__u16		le_conn_max_interval;
407 	__u16		le_conn_latency;
408 	__u16		le_supv_timeout;
409 	__u16		le_def_tx_len;
410 	__u16		le_def_tx_time;
411 	__u16		le_max_tx_len;
412 	__u16		le_max_tx_time;
413 	__u16		le_max_rx_len;
414 	__u16		le_max_rx_time;
415 	__u8		le_max_key_size;
416 	__u8		le_min_key_size;
417 	__u16		discov_interleaved_timeout;
418 	__u16		conn_info_min_age;
419 	__u16		conn_info_max_age;
420 	__u16		auth_payload_timeout;
421 	__u8		min_enc_key_size;
422 	__u8		max_enc_key_size;
423 	__u8		pairing_opts;
424 	__u8		ssp_debug_mode;
425 	__u8		hw_error_code;
426 	__u32		clock;
427 	__u16		advmon_allowlist_duration;
428 	__u16		advmon_no_filter_duration;
429 	__u8		enable_advmon_interleave_scan;
430 
431 	__u16		devid_source;
432 	__u16		devid_vendor;
433 	__u16		devid_product;
434 	__u16		devid_version;
435 
436 	__u8		def_page_scan_type;
437 	__u16		def_page_scan_int;
438 	__u16		def_page_scan_window;
439 	__u8		def_inq_scan_type;
440 	__u16		def_inq_scan_int;
441 	__u16		def_inq_scan_window;
442 	__u16		def_br_lsto;
443 	__u16		def_page_timeout;
444 	__u16		def_multi_adv_rotation_duration;
445 	__u16		def_le_autoconnect_timeout;
446 	__s8		min_le_tx_power;
447 	__s8		max_le_tx_power;
448 
449 	__u16		pkt_type;
450 	__u16		esco_type;
451 	__u16		link_policy;
452 	__u16		link_mode;
453 
454 	__u32		idle_timeout;
455 	__u16		sniff_min_interval;
456 	__u16		sniff_max_interval;
457 
458 	__u8		amp_status;
459 	__u32		amp_total_bw;
460 	__u32		amp_max_bw;
461 	__u32		amp_min_latency;
462 	__u32		amp_max_pdu;
463 	__u8		amp_type;
464 	__u16		amp_pal_cap;
465 	__u16		amp_assoc_size;
466 	__u32		amp_max_flush_to;
467 	__u32		amp_be_flush_to;
468 
469 	struct amp_assoc	loc_assoc;
470 
471 	__u8		flow_ctl_mode;
472 
473 	unsigned int	auto_accept_delay;
474 
475 	unsigned long	quirks;
476 
477 	atomic_t	cmd_cnt;
478 	unsigned int	acl_cnt;
479 	unsigned int	sco_cnt;
480 	unsigned int	le_cnt;
481 	unsigned int	iso_cnt;
482 
483 	unsigned int	acl_mtu;
484 	unsigned int	sco_mtu;
485 	unsigned int	le_mtu;
486 	unsigned int	iso_mtu;
487 	unsigned int	acl_pkts;
488 	unsigned int	sco_pkts;
489 	unsigned int	le_pkts;
490 	unsigned int	iso_pkts;
491 
492 	__u16		block_len;
493 	__u16		block_mtu;
494 	__u16		num_blocks;
495 	__u16		block_cnt;
496 
497 	unsigned long	acl_last_tx;
498 	unsigned long	sco_last_tx;
499 	unsigned long	le_last_tx;
500 
501 	__u8		le_tx_def_phys;
502 	__u8		le_rx_def_phys;
503 
504 	struct workqueue_struct	*workqueue;
505 	struct workqueue_struct	*req_workqueue;
506 
507 	struct work_struct	power_on;
508 	struct delayed_work	power_off;
509 	struct work_struct	error_reset;
510 	struct work_struct	cmd_sync_work;
511 	struct list_head	cmd_sync_work_list;
512 	struct mutex		cmd_sync_work_lock;
513 	struct work_struct	cmd_sync_cancel_work;
514 
515 	__u16			discov_timeout;
516 	struct delayed_work	discov_off;
517 
518 	struct delayed_work	service_cache;
519 
520 	struct delayed_work	cmd_timer;
521 	struct delayed_work	ncmd_timer;
522 
523 	struct work_struct	rx_work;
524 	struct work_struct	cmd_work;
525 	struct work_struct	tx_work;
526 
527 	struct delayed_work	le_scan_disable;
528 	struct delayed_work	le_scan_restart;
529 
530 	struct sk_buff_head	rx_q;
531 	struct sk_buff_head	raw_q;
532 	struct sk_buff_head	cmd_q;
533 
534 	struct sk_buff		*sent_cmd;
535 	struct sk_buff		*recv_event;
536 
537 	struct mutex		req_lock;
538 	wait_queue_head_t	req_wait_q;
539 	__u32			req_status;
540 	__u32			req_result;
541 	struct sk_buff		*req_skb;
542 
543 	void			*smp_data;
544 	void			*smp_bredr_data;
545 
546 	struct discovery_state	discovery;
547 
548 	int			discovery_old_state;
549 	bool			discovery_paused;
550 	int			advertising_old_state;
551 	bool			advertising_paused;
552 
553 	struct notifier_block	suspend_notifier;
554 	enum suspended_state	suspend_state_next;
555 	enum suspended_state	suspend_state;
556 	bool			scanning_paused;
557 	bool			suspended;
558 	u8			wake_reason;
559 	bdaddr_t		wake_addr;
560 	u8			wake_addr_type;
561 
562 	struct hci_conn_hash	conn_hash;
563 
564 	struct list_head	mgmt_pending;
565 	struct list_head	reject_list;
566 	struct list_head	accept_list;
567 	struct list_head	uuids;
568 	struct list_head	link_keys;
569 	struct list_head	long_term_keys;
570 	struct list_head	identity_resolving_keys;
571 	struct list_head	remote_oob_data;
572 	struct list_head	le_accept_list;
573 	struct list_head	le_resolv_list;
574 	struct list_head	le_conn_params;
575 	struct list_head	pend_le_conns;
576 	struct list_head	pend_le_reports;
577 	struct list_head	blocked_keys;
578 	struct list_head	local_codecs;
579 
580 	struct hci_dev_stats	stat;
581 
582 	atomic_t		promisc;
583 
584 	const char		*hw_info;
585 	const char		*fw_info;
586 	struct dentry		*debugfs;
587 
588 	struct device		dev;
589 
590 	struct rfkill		*rfkill;
591 
592 	DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
593 	hci_conn_flags_t	conn_flags;
594 
595 	__s8			adv_tx_power;
596 	__u8			adv_data[HCI_MAX_EXT_AD_LENGTH];
597 	__u8			adv_data_len;
598 	__u8			scan_rsp_data[HCI_MAX_EXT_AD_LENGTH];
599 	__u8			scan_rsp_data_len;
600 	__u8			per_adv_data[HCI_MAX_PER_AD_LENGTH];
601 	__u8			per_adv_data_len;
602 
603 	struct list_head	adv_instances;
604 	unsigned int		adv_instance_cnt;
605 	__u8			cur_adv_instance;
606 	__u16			adv_instance_timeout;
607 	struct delayed_work	adv_instance_expire;
608 
609 	struct idr		adv_monitors_idr;
610 	unsigned int		adv_monitors_cnt;
611 
612 	__u8			irk[16];
613 	__u32			rpa_timeout;
614 	struct delayed_work	rpa_expired;
615 	bdaddr_t		rpa;
616 
617 	enum {
618 		INTERLEAVE_SCAN_NONE,
619 		INTERLEAVE_SCAN_NO_FILTER,
620 		INTERLEAVE_SCAN_ALLOWLIST
621 	} interleave_scan_state;
622 
623 	struct delayed_work	interleave_scan;
624 
625 	struct list_head	monitored_devices;
626 	bool			advmon_pend_notify;
627 
628 #if IS_ENABLED(CONFIG_BT_LEDS)
629 	struct led_trigger	*power_led;
630 #endif
631 
632 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
633 	__u16			msft_opcode;
634 	void			*msft_data;
635 	bool			msft_curve_validity;
636 #endif
637 
638 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
639 	bool			aosp_capable;
640 	bool			aosp_quality_report;
641 #endif
642 
643 	int (*open)(struct hci_dev *hdev);
644 	int (*close)(struct hci_dev *hdev);
645 	int (*flush)(struct hci_dev *hdev);
646 	int (*setup)(struct hci_dev *hdev);
647 	int (*shutdown)(struct hci_dev *hdev);
648 	int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
649 	void (*notify)(struct hci_dev *hdev, unsigned int evt);
650 	void (*hw_error)(struct hci_dev *hdev, u8 code);
651 	int (*post_init)(struct hci_dev *hdev);
652 	int (*set_diag)(struct hci_dev *hdev, bool enable);
653 	int (*set_bdaddr)(struct hci_dev *hdev, const bdaddr_t *bdaddr);
654 	void (*cmd_timeout)(struct hci_dev *hdev);
655 	bool (*wakeup)(struct hci_dev *hdev);
656 	int (*set_quality_report)(struct hci_dev *hdev, bool enable);
657 	int (*get_data_path_id)(struct hci_dev *hdev, __u8 *data_path);
658 	int (*get_codec_config_data)(struct hci_dev *hdev, __u8 type,
659 				     struct bt_codec *codec, __u8 *vnd_len,
660 				     __u8 **vnd_data);
661 };
662 
663 #define HCI_PHY_HANDLE(handle)	(handle & 0xff)
664 
665 enum conn_reasons {
666 	CONN_REASON_PAIR_DEVICE,
667 	CONN_REASON_L2CAP_CHAN,
668 	CONN_REASON_SCO_CONNECT,
669 	CONN_REASON_ISO_CONNECT,
670 };
671 
672 struct hci_conn {
673 	struct list_head list;
674 
675 	atomic_t	refcnt;
676 
677 	bdaddr_t	dst;
678 	__u8		dst_type;
679 	bdaddr_t	src;
680 	__u8		src_type;
681 	bdaddr_t	init_addr;
682 	__u8		init_addr_type;
683 	bdaddr_t	resp_addr;
684 	__u8		resp_addr_type;
685 	__u8		adv_instance;
686 	__u16		handle;
687 	__u16		sync_handle;
688 	__u16		state;
689 	__u8		mode;
690 	__u8		type;
691 	__u8		role;
692 	bool		out;
693 	__u8		attempt;
694 	__u8		dev_class[3];
695 	__u8		features[HCI_MAX_PAGES][8];
696 	__u16		pkt_type;
697 	__u16		link_policy;
698 	__u8		key_type;
699 	__u8		auth_type;
700 	__u8		sec_level;
701 	__u8		pending_sec_level;
702 	__u8		pin_length;
703 	__u8		enc_key_size;
704 	__u8		io_capability;
705 	__u32		passkey_notify;
706 	__u8		passkey_entered;
707 	__u16		disc_timeout;
708 	__u16		conn_timeout;
709 	__u16		setting;
710 	__u16		auth_payload_timeout;
711 	__u16		le_conn_min_interval;
712 	__u16		le_conn_max_interval;
713 	__u16		le_conn_interval;
714 	__u16		le_conn_latency;
715 	__u16		le_supv_timeout;
716 	__u8		le_adv_data[HCI_MAX_AD_LENGTH];
717 	__u8		le_adv_data_len;
718 	__u8		le_per_adv_data[HCI_MAX_PER_AD_LENGTH];
719 	__u8		le_per_adv_data_len;
720 	__u8		le_tx_phy;
721 	__u8		le_rx_phy;
722 	__s8		rssi;
723 	__s8		tx_power;
724 	__s8		max_tx_power;
725 	struct bt_iso_qos iso_qos;
726 	unsigned long	flags;
727 
728 	enum conn_reasons conn_reason;
729 
730 	__u32		clock;
731 	__u16		clock_accuracy;
732 
733 	unsigned long	conn_info_timestamp;
734 
735 	__u8		remote_cap;
736 	__u8		remote_auth;
737 	__u8		remote_id;
738 
739 	unsigned int	sent;
740 
741 	struct sk_buff_head data_q;
742 	struct list_head chan_list;
743 
744 	struct delayed_work disc_work;
745 	struct delayed_work auto_accept_work;
746 	struct delayed_work idle_work;
747 	struct delayed_work le_conn_timeout;
748 	struct work_struct  le_scan_cleanup;
749 
750 	struct device	dev;
751 	struct dentry	*debugfs;
752 
753 	struct hci_dev	*hdev;
754 	void		*l2cap_data;
755 	void		*sco_data;
756 	void		*iso_data;
757 	struct amp_mgr	*amp_mgr;
758 
759 	struct hci_conn	*link;
760 	struct bt_codec codec;
761 
762 	void (*connect_cfm_cb)	(struct hci_conn *conn, u8 status);
763 	void (*security_cfm_cb)	(struct hci_conn *conn, u8 status);
764 	void (*disconn_cfm_cb)	(struct hci_conn *conn, u8 reason);
765 
766 	void (*cleanup)(struct hci_conn *conn);
767 };
768 
769 struct hci_chan {
770 	struct list_head list;
771 	__u16 handle;
772 	struct hci_conn *conn;
773 	struct sk_buff_head data_q;
774 	unsigned int	sent;
775 	__u8		state;
776 	bool		amp;
777 };
778 
779 struct hci_conn_params {
780 	struct list_head list;
781 	struct list_head action;
782 
783 	bdaddr_t addr;
784 	u8 addr_type;
785 
786 	u16 conn_min_interval;
787 	u16 conn_max_interval;
788 	u16 conn_latency;
789 	u16 supervision_timeout;
790 
791 	enum {
792 		HCI_AUTO_CONN_DISABLED,
793 		HCI_AUTO_CONN_REPORT,
794 		HCI_AUTO_CONN_DIRECT,
795 		HCI_AUTO_CONN_ALWAYS,
796 		HCI_AUTO_CONN_LINK_LOSS,
797 		HCI_AUTO_CONN_EXPLICIT,
798 	} auto_connect;
799 
800 	struct hci_conn *conn;
801 	bool explicit_connect;
802 	hci_conn_flags_t flags;
803 	u8  privacy_mode;
804 };
805 
806 extern struct list_head hci_dev_list;
807 extern struct list_head hci_cb_list;
808 extern rwlock_t hci_dev_list_lock;
809 extern struct mutex hci_cb_list_lock;
810 
811 #define hci_dev_set_flag(hdev, nr)             set_bit((nr), (hdev)->dev_flags)
812 #define hci_dev_clear_flag(hdev, nr)           clear_bit((nr), (hdev)->dev_flags)
813 #define hci_dev_change_flag(hdev, nr)          change_bit((nr), (hdev)->dev_flags)
814 #define hci_dev_test_flag(hdev, nr)            test_bit((nr), (hdev)->dev_flags)
815 #define hci_dev_test_and_set_flag(hdev, nr)    test_and_set_bit((nr), (hdev)->dev_flags)
816 #define hci_dev_test_and_clear_flag(hdev, nr)  test_and_clear_bit((nr), (hdev)->dev_flags)
817 #define hci_dev_test_and_change_flag(hdev, nr) test_and_change_bit((nr), (hdev)->dev_flags)
818 
819 #define hci_dev_clear_volatile_flags(hdev)			\
820 	do {							\
821 		hci_dev_clear_flag(hdev, HCI_LE_SCAN);		\
822 		hci_dev_clear_flag(hdev, HCI_LE_ADV);		\
823 		hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);\
824 		hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);	\
825 		hci_dev_clear_flag(hdev, HCI_QUALITY_REPORT);	\
826 	} while (0)
827 
828 #define hci_dev_le_state_simultaneous(hdev) \
829 	(test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) && \
830 	 (hdev->le_states[4] & 0x08) &&	/* Central */ \
831 	 (hdev->le_states[4] & 0x40) &&	/* Peripheral */ \
832 	 (hdev->le_states[3] & 0x10))	/* Simultaneous */
833 
834 /* ----- HCI interface to upper protocols ----- */
835 int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
836 int l2cap_disconn_ind(struct hci_conn *hcon);
837 void l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
838 
839 #if IS_ENABLED(CONFIG_BT_BREDR)
840 int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
841 void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
842 #else
843 static inline int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
844 				  __u8 *flags)
845 {
846 	return 0;
847 }
848 
849 static inline void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb)
850 {
851 }
852 #endif
853 
854 #if IS_ENABLED(CONFIG_BT_LE)
855 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
856 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags);
857 #else
858 static inline int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
859 				  __u8 *flags)
860 {
861 	return 0;
862 }
863 static inline void iso_recv(struct hci_conn *hcon, struct sk_buff *skb,
864 			    u16 flags)
865 {
866 }
867 #endif
868 
869 /* ----- Inquiry cache ----- */
870 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
871 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
872 
873 static inline void discovery_init(struct hci_dev *hdev)
874 {
875 	hdev->discovery.state = DISCOVERY_STOPPED;
876 	INIT_LIST_HEAD(&hdev->discovery.all);
877 	INIT_LIST_HEAD(&hdev->discovery.unknown);
878 	INIT_LIST_HEAD(&hdev->discovery.resolve);
879 	hdev->discovery.report_invalid_rssi = true;
880 	hdev->discovery.rssi = HCI_RSSI_INVALID;
881 }
882 
883 static inline void hci_discovery_filter_clear(struct hci_dev *hdev)
884 {
885 	hdev->discovery.result_filtering = false;
886 	hdev->discovery.report_invalid_rssi = true;
887 	hdev->discovery.rssi = HCI_RSSI_INVALID;
888 	hdev->discovery.uuid_count = 0;
889 	kfree(hdev->discovery.uuids);
890 	hdev->discovery.uuids = NULL;
891 	hdev->discovery.scan_start = 0;
892 	hdev->discovery.scan_duration = 0;
893 }
894 
895 bool hci_discovery_active(struct hci_dev *hdev);
896 
897 void hci_discovery_set_state(struct hci_dev *hdev, int state);
898 
899 static inline int inquiry_cache_empty(struct hci_dev *hdev)
900 {
901 	return list_empty(&hdev->discovery.all);
902 }
903 
904 static inline long inquiry_cache_age(struct hci_dev *hdev)
905 {
906 	struct discovery_state *c = &hdev->discovery;
907 	return jiffies - c->timestamp;
908 }
909 
910 static inline long inquiry_entry_age(struct inquiry_entry *e)
911 {
912 	return jiffies - e->timestamp;
913 }
914 
915 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
916 					       bdaddr_t *bdaddr);
917 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
918 						       bdaddr_t *bdaddr);
919 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
920 						       bdaddr_t *bdaddr,
921 						       int state);
922 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
923 				      struct inquiry_entry *ie);
924 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
925 			     bool name_known);
926 void hci_inquiry_cache_flush(struct hci_dev *hdev);
927 
928 /* ----- HCI Connections ----- */
929 enum {
930 	HCI_CONN_AUTH_PEND,
931 	HCI_CONN_REAUTH_PEND,
932 	HCI_CONN_ENCRYPT_PEND,
933 	HCI_CONN_RSWITCH_PEND,
934 	HCI_CONN_MODE_CHANGE_PEND,
935 	HCI_CONN_SCO_SETUP_PEND,
936 	HCI_CONN_MGMT_CONNECTED,
937 	HCI_CONN_SSP_ENABLED,
938 	HCI_CONN_SC_ENABLED,
939 	HCI_CONN_AES_CCM,
940 	HCI_CONN_POWER_SAVE,
941 	HCI_CONN_FLUSH_KEY,
942 	HCI_CONN_ENCRYPT,
943 	HCI_CONN_AUTH,
944 	HCI_CONN_SECURE,
945 	HCI_CONN_FIPS,
946 	HCI_CONN_STK_ENCRYPT,
947 	HCI_CONN_AUTH_INITIATOR,
948 	HCI_CONN_DROP,
949 	HCI_CONN_PARAM_REMOVAL_PEND,
950 	HCI_CONN_NEW_LINK_KEY,
951 	HCI_CONN_SCANNING,
952 	HCI_CONN_AUTH_FAILURE,
953 	HCI_CONN_PER_ADV,
954 };
955 
956 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
957 {
958 	struct hci_dev *hdev = conn->hdev;
959 	return hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
960 	       test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
961 }
962 
963 static inline bool hci_conn_sc_enabled(struct hci_conn *conn)
964 {
965 	struct hci_dev *hdev = conn->hdev;
966 	return hci_dev_test_flag(hdev, HCI_SC_ENABLED) &&
967 	       test_bit(HCI_CONN_SC_ENABLED, &conn->flags);
968 }
969 
970 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
971 {
972 	struct hci_conn_hash *h = &hdev->conn_hash;
973 	list_add_rcu(&c->list, &h->list);
974 	switch (c->type) {
975 	case ACL_LINK:
976 		h->acl_num++;
977 		break;
978 	case AMP_LINK:
979 		h->amp_num++;
980 		break;
981 	case LE_LINK:
982 		h->le_num++;
983 		if (c->role == HCI_ROLE_SLAVE)
984 			h->le_num_peripheral++;
985 		break;
986 	case SCO_LINK:
987 	case ESCO_LINK:
988 		h->sco_num++;
989 		break;
990 	case ISO_LINK:
991 		h->iso_num++;
992 		break;
993 	}
994 }
995 
996 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
997 {
998 	struct hci_conn_hash *h = &hdev->conn_hash;
999 
1000 	list_del_rcu(&c->list);
1001 	synchronize_rcu();
1002 
1003 	switch (c->type) {
1004 	case ACL_LINK:
1005 		h->acl_num--;
1006 		break;
1007 	case AMP_LINK:
1008 		h->amp_num--;
1009 		break;
1010 	case LE_LINK:
1011 		h->le_num--;
1012 		if (c->role == HCI_ROLE_SLAVE)
1013 			h->le_num_peripheral--;
1014 		break;
1015 	case SCO_LINK:
1016 	case ESCO_LINK:
1017 		h->sco_num--;
1018 		break;
1019 	case ISO_LINK:
1020 		h->iso_num--;
1021 		break;
1022 	}
1023 }
1024 
1025 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
1026 {
1027 	struct hci_conn_hash *h = &hdev->conn_hash;
1028 	switch (type) {
1029 	case ACL_LINK:
1030 		return h->acl_num;
1031 	case AMP_LINK:
1032 		return h->amp_num;
1033 	case LE_LINK:
1034 		return h->le_num;
1035 	case SCO_LINK:
1036 	case ESCO_LINK:
1037 		return h->sco_num;
1038 	case ISO_LINK:
1039 		return h->iso_num;
1040 	default:
1041 		return 0;
1042 	}
1043 }
1044 
1045 static inline unsigned int hci_conn_count(struct hci_dev *hdev)
1046 {
1047 	struct hci_conn_hash *c = &hdev->conn_hash;
1048 
1049 	return c->acl_num + c->amp_num + c->sco_num + c->le_num + c->iso_num;
1050 }
1051 
1052 static inline __u8 hci_conn_lookup_type(struct hci_dev *hdev, __u16 handle)
1053 {
1054 	struct hci_conn_hash *h = &hdev->conn_hash;
1055 	struct hci_conn *c;
1056 	__u8 type = INVALID_LINK;
1057 
1058 	rcu_read_lock();
1059 
1060 	list_for_each_entry_rcu(c, &h->list, list) {
1061 		if (c->handle == handle) {
1062 			type = c->type;
1063 			break;
1064 		}
1065 	}
1066 
1067 	rcu_read_unlock();
1068 
1069 	return type;
1070 }
1071 
1072 static inline struct hci_conn *hci_conn_hash_lookup_bis(struct hci_dev *hdev,
1073 							bdaddr_t *ba,
1074 							__u8 big, __u8 bis)
1075 {
1076 	struct hci_conn_hash *h = &hdev->conn_hash;
1077 	struct hci_conn  *c;
1078 
1079 	rcu_read_lock();
1080 
1081 	list_for_each_entry_rcu(c, &h->list, list) {
1082 		if (bacmp(&c->dst, ba) || c->type != ISO_LINK)
1083 			continue;
1084 
1085 		if (c->iso_qos.big == big && c->iso_qos.bis == bis) {
1086 			rcu_read_unlock();
1087 			return c;
1088 		}
1089 	}
1090 	rcu_read_unlock();
1091 
1092 	return NULL;
1093 }
1094 
1095 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
1096 								__u16 handle)
1097 {
1098 	struct hci_conn_hash *h = &hdev->conn_hash;
1099 	struct hci_conn  *c;
1100 
1101 	rcu_read_lock();
1102 
1103 	list_for_each_entry_rcu(c, &h->list, list) {
1104 		if (c->handle == handle) {
1105 			rcu_read_unlock();
1106 			return c;
1107 		}
1108 	}
1109 	rcu_read_unlock();
1110 
1111 	return NULL;
1112 }
1113 
1114 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
1115 							__u8 type, bdaddr_t *ba)
1116 {
1117 	struct hci_conn_hash *h = &hdev->conn_hash;
1118 	struct hci_conn  *c;
1119 
1120 	rcu_read_lock();
1121 
1122 	list_for_each_entry_rcu(c, &h->list, list) {
1123 		if (c->type == type && !bacmp(&c->dst, ba)) {
1124 			rcu_read_unlock();
1125 			return c;
1126 		}
1127 	}
1128 
1129 	rcu_read_unlock();
1130 
1131 	return NULL;
1132 }
1133 
1134 static inline struct hci_conn *hci_conn_hash_lookup_le(struct hci_dev *hdev,
1135 						       bdaddr_t *ba,
1136 						       __u8 ba_type)
1137 {
1138 	struct hci_conn_hash *h = &hdev->conn_hash;
1139 	struct hci_conn  *c;
1140 
1141 	rcu_read_lock();
1142 
1143 	list_for_each_entry_rcu(c, &h->list, list) {
1144 		if (c->type != LE_LINK)
1145 		       continue;
1146 
1147 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1148 			rcu_read_unlock();
1149 			return c;
1150 		}
1151 	}
1152 
1153 	rcu_read_unlock();
1154 
1155 	return NULL;
1156 }
1157 
1158 static inline struct hci_conn *hci_conn_hash_lookup_cis(struct hci_dev *hdev,
1159 							bdaddr_t *ba,
1160 							__u8 ba_type)
1161 {
1162 	struct hci_conn_hash *h = &hdev->conn_hash;
1163 	struct hci_conn  *c;
1164 
1165 	rcu_read_lock();
1166 
1167 	list_for_each_entry_rcu(c, &h->list, list) {
1168 		if (c->type != ISO_LINK)
1169 			continue;
1170 
1171 		if (ba_type == c->dst_type && !bacmp(&c->dst, ba)) {
1172 			rcu_read_unlock();
1173 			return c;
1174 		}
1175 	}
1176 
1177 	rcu_read_unlock();
1178 
1179 	return NULL;
1180 }
1181 
1182 static inline struct hci_conn *hci_conn_hash_lookup_cig(struct hci_dev *hdev,
1183 							__u8 handle)
1184 {
1185 	struct hci_conn_hash *h = &hdev->conn_hash;
1186 	struct hci_conn  *c;
1187 
1188 	rcu_read_lock();
1189 
1190 	list_for_each_entry_rcu(c, &h->list, list) {
1191 		if (c->type != ISO_LINK)
1192 			continue;
1193 
1194 		if (handle == c->iso_qos.cig) {
1195 			rcu_read_unlock();
1196 			return c;
1197 		}
1198 	}
1199 
1200 	rcu_read_unlock();
1201 
1202 	return NULL;
1203 }
1204 
1205 static inline struct hci_conn *hci_conn_hash_lookup_big(struct hci_dev *hdev,
1206 							__u8 handle)
1207 {
1208 	struct hci_conn_hash *h = &hdev->conn_hash;
1209 	struct hci_conn  *c;
1210 
1211 	rcu_read_lock();
1212 
1213 	list_for_each_entry_rcu(c, &h->list, list) {
1214 		if (bacmp(&c->dst, BDADDR_ANY) || c->type != ISO_LINK)
1215 			continue;
1216 
1217 		if (handle == c->iso_qos.big) {
1218 			rcu_read_unlock();
1219 			return c;
1220 		}
1221 	}
1222 
1223 	rcu_read_unlock();
1224 
1225 	return NULL;
1226 }
1227 
1228 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
1229 							__u8 type, __u16 state)
1230 {
1231 	struct hci_conn_hash *h = &hdev->conn_hash;
1232 	struct hci_conn  *c;
1233 
1234 	rcu_read_lock();
1235 
1236 	list_for_each_entry_rcu(c, &h->list, list) {
1237 		if (c->type == type && c->state == state) {
1238 			rcu_read_unlock();
1239 			return c;
1240 		}
1241 	}
1242 
1243 	rcu_read_unlock();
1244 
1245 	return NULL;
1246 }
1247 
1248 typedef void (*hci_conn_func_t)(struct hci_conn *conn, void *data);
1249 static inline void hci_conn_hash_list_state(struct hci_dev *hdev,
1250 					    hci_conn_func_t func, __u8 type,
1251 					    __u16 state, void *data)
1252 {
1253 	struct hci_conn_hash *h = &hdev->conn_hash;
1254 	struct hci_conn  *c;
1255 
1256 	if (!func)
1257 		return;
1258 
1259 	rcu_read_lock();
1260 
1261 	list_for_each_entry_rcu(c, &h->list, list) {
1262 		if (c->type == type && c->state == state)
1263 			func(c, data);
1264 	}
1265 
1266 	rcu_read_unlock();
1267 }
1268 
1269 static inline struct hci_conn *hci_lookup_le_connect(struct hci_dev *hdev)
1270 {
1271 	struct hci_conn_hash *h = &hdev->conn_hash;
1272 	struct hci_conn  *c;
1273 
1274 	rcu_read_lock();
1275 
1276 	list_for_each_entry_rcu(c, &h->list, list) {
1277 		if (c->type == LE_LINK && c->state == BT_CONNECT &&
1278 		    !test_bit(HCI_CONN_SCANNING, &c->flags)) {
1279 			rcu_read_unlock();
1280 			return c;
1281 		}
1282 	}
1283 
1284 	rcu_read_unlock();
1285 
1286 	return NULL;
1287 }
1288 
1289 int hci_disconnect(struct hci_conn *conn, __u8 reason);
1290 bool hci_setup_sync(struct hci_conn *conn, __u16 handle);
1291 void hci_sco_setup(struct hci_conn *conn, __u8 status);
1292 bool hci_iso_setup_path(struct hci_conn *conn);
1293 int hci_le_create_cis(struct hci_conn *conn);
1294 
1295 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
1296 			      u8 role);
1297 int hci_conn_del(struct hci_conn *conn);
1298 void hci_conn_hash_flush(struct hci_dev *hdev);
1299 void hci_conn_check_pending(struct hci_dev *hdev);
1300 
1301 struct hci_chan *hci_chan_create(struct hci_conn *conn);
1302 void hci_chan_del(struct hci_chan *chan);
1303 void hci_chan_list_flush(struct hci_conn *conn);
1304 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
1305 
1306 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
1307 				     u8 dst_type, u8 sec_level,
1308 				     u16 conn_timeout,
1309 				     enum conn_reasons conn_reason);
1310 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
1311 				u8 dst_type, bool dst_resolved, u8 sec_level,
1312 				u16 conn_timeout, u8 role);
1313 struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
1314 				 u8 sec_level, u8 auth_type,
1315 				 enum conn_reasons conn_reason);
1316 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
1317 				 __u16 setting, struct bt_codec *codec);
1318 struct hci_conn *hci_bind_cis(struct hci_dev *hdev, bdaddr_t *dst,
1319 			      __u8 dst_type, struct bt_iso_qos *qos);
1320 struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
1321 				 __u8 dst_type, struct bt_iso_qos *qos);
1322 struct hci_conn *hci_connect_bis(struct hci_dev *hdev, bdaddr_t *dst,
1323 				 __u8 dst_type, struct bt_iso_qos *qos,
1324 				 __u8 data_len, __u8 *data);
1325 int hci_pa_create_sync(struct hci_dev *hdev, bdaddr_t *dst, __u8 dst_type,
1326 		       __u8 sid);
1327 int hci_le_big_create_sync(struct hci_dev *hdev, struct bt_iso_qos *qos,
1328 			   __u16 sync_handle, __u8 num_bis, __u8 bis[]);
1329 int hci_conn_check_link_mode(struct hci_conn *conn);
1330 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
1331 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type,
1332 		      bool initiator);
1333 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
1334 
1335 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
1336 
1337 void hci_conn_failed(struct hci_conn *conn, u8 status);
1338 
1339 /*
1340  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
1341  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
1342  * working or anything else. They just guarantee that the object is available
1343  * and can be dereferenced. So you can use its locks, local variables and any
1344  * other constant data.
1345  * Before accessing runtime data, you _must_ lock the object and then check that
1346  * it is still running. As soon as you release the locks, the connection might
1347  * get dropped, though.
1348  *
1349  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
1350  * how long the underlying connection is held. So every channel that runs on the
1351  * hci_conn object calls this to prevent the connection from disappearing. As
1352  * long as you hold a device, you must also guarantee that you have a valid
1353  * reference to the device via hci_conn_get() (or the initial reference from
1354  * hci_conn_add()).
1355  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
1356  * break because nobody cares for that. But this means, we cannot use
1357  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
1358  */
1359 
1360 static inline struct hci_conn *hci_conn_get(struct hci_conn *conn)
1361 {
1362 	get_device(&conn->dev);
1363 	return conn;
1364 }
1365 
1366 static inline void hci_conn_put(struct hci_conn *conn)
1367 {
1368 	put_device(&conn->dev);
1369 }
1370 
1371 static inline void hci_conn_hold(struct hci_conn *conn)
1372 {
1373 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1374 
1375 	atomic_inc(&conn->refcnt);
1376 	cancel_delayed_work(&conn->disc_work);
1377 }
1378 
1379 static inline void hci_conn_drop(struct hci_conn *conn)
1380 {
1381 	BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
1382 
1383 	if (atomic_dec_and_test(&conn->refcnt)) {
1384 		unsigned long timeo;
1385 
1386 		switch (conn->type) {
1387 		case ACL_LINK:
1388 		case LE_LINK:
1389 			cancel_delayed_work(&conn->idle_work);
1390 			if (conn->state == BT_CONNECTED) {
1391 				timeo = conn->disc_timeout;
1392 				if (!conn->out)
1393 					timeo *= 2;
1394 			} else {
1395 				timeo = 0;
1396 			}
1397 			break;
1398 
1399 		case AMP_LINK:
1400 			timeo = conn->disc_timeout;
1401 			break;
1402 
1403 		default:
1404 			timeo = 0;
1405 			break;
1406 		}
1407 
1408 		cancel_delayed_work(&conn->disc_work);
1409 		queue_delayed_work(conn->hdev->workqueue,
1410 				   &conn->disc_work, timeo);
1411 	}
1412 }
1413 
1414 /* ----- HCI Devices ----- */
1415 static inline void hci_dev_put(struct hci_dev *d)
1416 {
1417 	BT_DBG("%s orig refcnt %d", d->name,
1418 	       kref_read(&d->dev.kobj.kref));
1419 
1420 	put_device(&d->dev);
1421 }
1422 
1423 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
1424 {
1425 	BT_DBG("%s orig refcnt %d", d->name,
1426 	       kref_read(&d->dev.kobj.kref));
1427 
1428 	get_device(&d->dev);
1429 	return d;
1430 }
1431 
1432 #define hci_dev_lock(d)		mutex_lock(&d->lock)
1433 #define hci_dev_unlock(d)	mutex_unlock(&d->lock)
1434 
1435 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
1436 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
1437 
1438 static inline void *hci_get_drvdata(struct hci_dev *hdev)
1439 {
1440 	return dev_get_drvdata(&hdev->dev);
1441 }
1442 
1443 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
1444 {
1445 	dev_set_drvdata(&hdev->dev, data);
1446 }
1447 
1448 static inline void *hci_get_priv(struct hci_dev *hdev)
1449 {
1450 	return (char *)hdev + sizeof(*hdev);
1451 }
1452 
1453 struct hci_dev *hci_dev_get(int index);
1454 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src, u8 src_type);
1455 
1456 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv);
1457 
1458 static inline struct hci_dev *hci_alloc_dev(void)
1459 {
1460 	return hci_alloc_dev_priv(0);
1461 }
1462 
1463 void hci_free_dev(struct hci_dev *hdev);
1464 int hci_register_dev(struct hci_dev *hdev);
1465 void hci_unregister_dev(struct hci_dev *hdev);
1466 void hci_release_dev(struct hci_dev *hdev);
1467 int hci_register_suspend_notifier(struct hci_dev *hdev);
1468 int hci_unregister_suspend_notifier(struct hci_dev *hdev);
1469 int hci_suspend_dev(struct hci_dev *hdev);
1470 int hci_resume_dev(struct hci_dev *hdev);
1471 int hci_reset_dev(struct hci_dev *hdev);
1472 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
1473 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
1474 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
1475 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
1476 
1477 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
1478 {
1479 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
1480 	hdev->msft_opcode = opcode;
1481 #endif
1482 }
1483 
1484 static inline void hci_set_aosp_capable(struct hci_dev *hdev)
1485 {
1486 #if IS_ENABLED(CONFIG_BT_AOSPEXT)
1487 	hdev->aosp_capable = true;
1488 #endif
1489 }
1490 
1491 int hci_dev_open(__u16 dev);
1492 int hci_dev_close(__u16 dev);
1493 int hci_dev_do_close(struct hci_dev *hdev);
1494 int hci_dev_reset(__u16 dev);
1495 int hci_dev_reset_stat(__u16 dev);
1496 int hci_dev_cmd(unsigned int cmd, void __user *arg);
1497 int hci_get_dev_list(void __user *arg);
1498 int hci_get_dev_info(void __user *arg);
1499 int hci_get_conn_list(void __user *arg);
1500 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
1501 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
1502 int hci_inquiry(void __user *arg);
1503 
1504 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *list,
1505 					   bdaddr_t *bdaddr, u8 type);
1506 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
1507 				    struct list_head *list, bdaddr_t *bdaddr,
1508 				    u8 type);
1509 struct bdaddr_list_with_flags *
1510 hci_bdaddr_list_lookup_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1511 				  u8 type);
1512 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1513 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1514 				 u8 type, u8 *peer_irk, u8 *local_irk);
1515 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1516 				   u8 type, u32 flags);
1517 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type);
1518 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
1519 				 u8 type);
1520 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
1521 				   u8 type);
1522 void hci_bdaddr_list_clear(struct list_head *list);
1523 
1524 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
1525 					       bdaddr_t *addr, u8 addr_type);
1526 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
1527 					    bdaddr_t *addr, u8 addr_type);
1528 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
1529 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
1530 
1531 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
1532 						  bdaddr_t *addr,
1533 						  u8 addr_type);
1534 
1535 void hci_uuids_clear(struct hci_dev *hdev);
1536 
1537 void hci_link_keys_clear(struct hci_dev *hdev);
1538 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1539 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1540 				  bdaddr_t *bdaddr, u8 *val, u8 type,
1541 				  u8 pin_len, bool *persistent);
1542 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1543 			    u8 addr_type, u8 type, u8 authenticated,
1544 			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand);
1545 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1546 			     u8 addr_type, u8 role);
1547 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);
1548 void hci_smp_ltks_clear(struct hci_dev *hdev);
1549 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
1550 
1551 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa);
1552 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1553 				     u8 addr_type);
1554 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1555 			    u8 addr_type, u8 val[16], bdaddr_t *rpa);
1556 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type);
1557 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]);
1558 void hci_blocked_keys_clear(struct hci_dev *hdev);
1559 void hci_smp_irks_clear(struct hci_dev *hdev);
1560 
1561 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1562 
1563 void hci_remote_oob_data_clear(struct hci_dev *hdev);
1564 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1565 					  bdaddr_t *bdaddr, u8 bdaddr_type);
1566 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1567 			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
1568 			    u8 *hash256, u8 *rand256);
1569 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1570 			       u8 bdaddr_type);
1571 
1572 void hci_adv_instances_clear(struct hci_dev *hdev);
1573 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance);
1574 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance);
1575 struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1576 				      u32 flags, u16 adv_data_len, u8 *adv_data,
1577 				      u16 scan_rsp_len, u8 *scan_rsp_data,
1578 				      u16 timeout, u16 duration, s8 tx_power,
1579 				      u32 min_interval, u32 max_interval);
1580 struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1581 				      u32 flags, u8 data_len, u8 *data,
1582 				      u32 min_interval, u32 max_interval);
1583 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1584 			 u16 adv_data_len, u8 *adv_data,
1585 			 u16 scan_rsp_len, u8 *scan_rsp_data);
1586 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
1587 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
1588 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance);
1589 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
1590 
1591 void hci_adv_monitors_clear(struct hci_dev *hdev);
1592 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1593 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
1594 int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
1595 int hci_remove_all_adv_monitor(struct hci_dev *hdev);
1596 bool hci_is_adv_monitoring(struct hci_dev *hdev);
1597 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
1598 
1599 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
1600 
1601 void hci_init_sysfs(struct hci_dev *hdev);
1602 void hci_conn_init_sysfs(struct hci_conn *conn);
1603 void hci_conn_add_sysfs(struct hci_conn *conn);
1604 void hci_conn_del_sysfs(struct hci_conn *conn);
1605 
1606 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
1607 
1608 /* ----- LMP capabilities ----- */
1609 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
1610 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
1611 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
1612 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
1613 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
1614 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
1615 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
1616 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
1617 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
1618 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
1619 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
1620 #define lmp_esco_2m_capable(dev)   ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
1621 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
1622 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
1623 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
1624 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
1625 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
1626 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
1627 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
1628 #define lmp_transp_capable(dev)    ((dev)->features[0][2] & LMP_TRANSPARENT)
1629 #define lmp_edr_2m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_2M)
1630 #define lmp_edr_3m_capable(dev)    ((dev)->features[0][3] & LMP_EDR_3M)
1631 #define lmp_edr_3slot_capable(dev) ((dev)->features[0][4] & LMP_EDR_3SLOT)
1632 #define lmp_edr_5slot_capable(dev) ((dev)->features[0][5] & LMP_EDR_5SLOT)
1633 
1634 /* ----- Extended LMP capabilities ----- */
1635 #define lmp_cpb_central_capable(dev) ((dev)->features[2][0] & LMP_CPB_CENTRAL)
1636 #define lmp_cpb_peripheral_capable(dev) ((dev)->features[2][0] & LMP_CPB_PERIPHERAL)
1637 #define lmp_sync_train_capable(dev) ((dev)->features[2][0] & LMP_SYNC_TRAIN)
1638 #define lmp_sync_scan_capable(dev)  ((dev)->features[2][0] & LMP_SYNC_SCAN)
1639 #define lmp_sc_capable(dev)         ((dev)->features[2][1] & LMP_SC)
1640 #define lmp_ping_capable(dev)       ((dev)->features[2][1] & LMP_PING)
1641 
1642 /* ----- Host capabilities ----- */
1643 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
1644 #define lmp_host_sc_capable(dev)   ((dev)->features[1][0] & LMP_HOST_SC)
1645 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
1646 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
1647 
1648 #define hdev_is_powered(dev)   (test_bit(HCI_UP, &(dev)->flags) && \
1649 				!hci_dev_test_flag(dev, HCI_AUTO_OFF))
1650 #define bredr_sc_enabled(dev)  (lmp_sc_capable(dev) && \
1651 				hci_dev_test_flag(dev, HCI_SC_ENABLED))
1652 #define rpa_valid(dev)         (bacmp(&dev->rpa, BDADDR_ANY) && \
1653 				!hci_dev_test_flag(dev, HCI_RPA_EXPIRED))
1654 #define adv_rpa_valid(adv)     (bacmp(&adv->random_addr, BDADDR_ANY) && \
1655 				!adv->rpa_expired)
1656 
1657 #define scan_1m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_1M) || \
1658 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_1M))
1659 
1660 #define scan_2m(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_2M) || \
1661 		      ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_2M))
1662 
1663 #define scan_coded(dev) (((dev)->le_tx_def_phys & HCI_LE_SET_PHY_CODED) || \
1664 			 ((dev)->le_rx_def_phys & HCI_LE_SET_PHY_CODED))
1665 
1666 #define ll_privacy_capable(dev) ((dev)->le_features[0] & HCI_LE_LL_PRIVACY)
1667 
1668 /* Use LL Privacy based address resolution if supported */
1669 #define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
1670 			     hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
1671 
1672 #define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
1673 				   (hdev->commands[39] & 0x04))
1674 
1675 /* Use enhanced synchronous connection if command is supported and its quirk
1676  * has not been set.
1677  */
1678 #define enhanced_sync_conn_capable(dev) \
1679 	(((dev)->commands[29] & 0x08) && \
1680 	 !test_bit(HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN, &(dev)->quirks))
1681 
1682 /* Use ext scanning if set ext scan param and ext scan enable is supported */
1683 #define use_ext_scan(dev) (((dev)->commands[37] & 0x20) && \
1684 			   ((dev)->commands[37] & 0x40))
1685 /* Use ext create connection if command is supported */
1686 #define use_ext_conn(dev) ((dev)->commands[37] & 0x80)
1687 
1688 /* Extended advertising support */
1689 #define ext_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_EXT_ADV))
1690 
1691 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 1789:
1692  *
1693  * C24: Mandatory if the LE Controller supports Connection State and either
1694  * LE Feature (LL Privacy) or LE Feature (Extended Advertising) is supported
1695  */
1696 #define use_enhanced_conn_complete(dev) (ll_privacy_capable(dev) || \
1697 					 ext_adv_capable(dev))
1698 
1699 /* Periodic advertising support */
1700 #define per_adv_capable(dev) (((dev)->le_features[1] & HCI_LE_PERIODIC_ADV))
1701 
1702 /* CIS Master/Slave and BIS support */
1703 #define iso_capable(dev) (cis_capable(dev) || bis_capable(dev))
1704 #define cis_capable(dev) \
1705 	(cis_central_capable(dev) || cis_peripheral_capable(dev))
1706 #define cis_central_capable(dev) \
1707 	((dev)->le_features[3] & HCI_LE_CIS_CENTRAL)
1708 #define cis_peripheral_capable(dev) \
1709 	((dev)->le_features[3] & HCI_LE_CIS_PERIPHERAL)
1710 #define bis_capable(dev) ((dev)->le_features[3] & HCI_LE_ISO_BROADCASTER)
1711 
1712 /* ----- HCI protocols ----- */
1713 #define HCI_PROTO_DEFER             0x01
1714 
1715 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
1716 					__u8 type, __u8 *flags)
1717 {
1718 	switch (type) {
1719 	case ACL_LINK:
1720 		return l2cap_connect_ind(hdev, bdaddr);
1721 
1722 	case SCO_LINK:
1723 	case ESCO_LINK:
1724 		return sco_connect_ind(hdev, bdaddr, flags);
1725 
1726 	case ISO_LINK:
1727 		return iso_connect_ind(hdev, bdaddr, flags);
1728 
1729 	default:
1730 		BT_ERR("unknown link type %d", type);
1731 		return -EINVAL;
1732 	}
1733 }
1734 
1735 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
1736 {
1737 	if (conn->type != ACL_LINK && conn->type != LE_LINK)
1738 		return HCI_ERROR_REMOTE_USER_TERM;
1739 
1740 	return l2cap_disconn_ind(conn);
1741 }
1742 
1743 /* ----- HCI callbacks ----- */
1744 struct hci_cb {
1745 	struct list_head list;
1746 
1747 	char *name;
1748 
1749 	void (*connect_cfm)	(struct hci_conn *conn, __u8 status);
1750 	void (*disconn_cfm)	(struct hci_conn *conn, __u8 status);
1751 	void (*security_cfm)	(struct hci_conn *conn, __u8 status,
1752 								__u8 encrypt);
1753 	void (*key_change_cfm)	(struct hci_conn *conn, __u8 status);
1754 	void (*role_switch_cfm)	(struct hci_conn *conn, __u8 status, __u8 role);
1755 };
1756 
1757 static inline void hci_connect_cfm(struct hci_conn *conn, __u8 status)
1758 {
1759 	struct hci_cb *cb;
1760 
1761 	mutex_lock(&hci_cb_list_lock);
1762 	list_for_each_entry(cb, &hci_cb_list, list) {
1763 		if (cb->connect_cfm)
1764 			cb->connect_cfm(conn, status);
1765 	}
1766 	mutex_unlock(&hci_cb_list_lock);
1767 
1768 	if (conn->connect_cfm_cb)
1769 		conn->connect_cfm_cb(conn, status);
1770 }
1771 
1772 static inline void hci_disconn_cfm(struct hci_conn *conn, __u8 reason)
1773 {
1774 	struct hci_cb *cb;
1775 
1776 	mutex_lock(&hci_cb_list_lock);
1777 	list_for_each_entry(cb, &hci_cb_list, list) {
1778 		if (cb->disconn_cfm)
1779 			cb->disconn_cfm(conn, reason);
1780 	}
1781 	mutex_unlock(&hci_cb_list_lock);
1782 
1783 	if (conn->disconn_cfm_cb)
1784 		conn->disconn_cfm_cb(conn, reason);
1785 }
1786 
1787 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
1788 {
1789 	struct hci_cb *cb;
1790 	__u8 encrypt;
1791 
1792 	if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
1793 		return;
1794 
1795 	encrypt = test_bit(HCI_CONN_ENCRYPT, &conn->flags) ? 0x01 : 0x00;
1796 
1797 	mutex_lock(&hci_cb_list_lock);
1798 	list_for_each_entry(cb, &hci_cb_list, list) {
1799 		if (cb->security_cfm)
1800 			cb->security_cfm(conn, status, encrypt);
1801 	}
1802 	mutex_unlock(&hci_cb_list_lock);
1803 
1804 	if (conn->security_cfm_cb)
1805 		conn->security_cfm_cb(conn, status);
1806 }
1807 
1808 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status)
1809 {
1810 	struct hci_cb *cb;
1811 	__u8 encrypt;
1812 
1813 	if (conn->state == BT_CONFIG) {
1814 		if (!status)
1815 			conn->state = BT_CONNECTED;
1816 
1817 		hci_connect_cfm(conn, status);
1818 		hci_conn_drop(conn);
1819 		return;
1820 	}
1821 
1822 	if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags))
1823 		encrypt = 0x00;
1824 	else if (test_bit(HCI_CONN_AES_CCM, &conn->flags))
1825 		encrypt = 0x02;
1826 	else
1827 		encrypt = 0x01;
1828 
1829 	if (!status) {
1830 		if (conn->sec_level == BT_SECURITY_SDP)
1831 			conn->sec_level = BT_SECURITY_LOW;
1832 
1833 		if (conn->pending_sec_level > conn->sec_level)
1834 			conn->sec_level = conn->pending_sec_level;
1835 	}
1836 
1837 	mutex_lock(&hci_cb_list_lock);
1838 	list_for_each_entry(cb, &hci_cb_list, list) {
1839 		if (cb->security_cfm)
1840 			cb->security_cfm(conn, status, encrypt);
1841 	}
1842 	mutex_unlock(&hci_cb_list_lock);
1843 
1844 	if (conn->security_cfm_cb)
1845 		conn->security_cfm_cb(conn, status);
1846 }
1847 
1848 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
1849 {
1850 	struct hci_cb *cb;
1851 
1852 	mutex_lock(&hci_cb_list_lock);
1853 	list_for_each_entry(cb, &hci_cb_list, list) {
1854 		if (cb->key_change_cfm)
1855 			cb->key_change_cfm(conn, status);
1856 	}
1857 	mutex_unlock(&hci_cb_list_lock);
1858 }
1859 
1860 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1861 								__u8 role)
1862 {
1863 	struct hci_cb *cb;
1864 
1865 	mutex_lock(&hci_cb_list_lock);
1866 	list_for_each_entry(cb, &hci_cb_list, list) {
1867 		if (cb->role_switch_cfm)
1868 			cb->role_switch_cfm(conn, status, role);
1869 	}
1870 	mutex_unlock(&hci_cb_list_lock);
1871 }
1872 
1873 static inline bool hci_bdaddr_is_rpa(bdaddr_t *bdaddr, u8 addr_type)
1874 {
1875 	if (addr_type != ADDR_LE_DEV_RANDOM)
1876 		return false;
1877 
1878 	if ((bdaddr->b[5] & 0xc0) == 0x40)
1879 	       return true;
1880 
1881 	return false;
1882 }
1883 
1884 static inline bool hci_is_identity_address(bdaddr_t *addr, u8 addr_type)
1885 {
1886 	if (addr_type == ADDR_LE_DEV_PUBLIC)
1887 		return true;
1888 
1889 	/* Check for Random Static address type */
1890 	if ((addr->b[5] & 0xc0) == 0xc0)
1891 		return true;
1892 
1893 	return false;
1894 }
1895 
1896 static inline struct smp_irk *hci_get_irk(struct hci_dev *hdev,
1897 					  bdaddr_t *bdaddr, u8 addr_type)
1898 {
1899 	if (!hci_bdaddr_is_rpa(bdaddr, addr_type))
1900 		return NULL;
1901 
1902 	return hci_find_irk_by_rpa(hdev, bdaddr);
1903 }
1904 
1905 static inline int hci_check_conn_params(u16 min, u16 max, u16 latency,
1906 					u16 to_multiplier)
1907 {
1908 	u16 max_latency;
1909 
1910 	if (min > max || min < 6 || max > 3200)
1911 		return -EINVAL;
1912 
1913 	if (to_multiplier < 10 || to_multiplier > 3200)
1914 		return -EINVAL;
1915 
1916 	if (max >= to_multiplier * 8)
1917 		return -EINVAL;
1918 
1919 	max_latency = (to_multiplier * 4 / max) - 1;
1920 	if (latency > 499 || latency > max_latency)
1921 		return -EINVAL;
1922 
1923 	return 0;
1924 }
1925 
1926 int hci_register_cb(struct hci_cb *hcb);
1927 int hci_unregister_cb(struct hci_cb *hcb);
1928 
1929 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
1930 		   const void *param);
1931 
1932 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1933 		 const void *param);
1934 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1935 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1936 void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb);
1937 
1938 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1939 void *hci_recv_event_data(struct hci_dev *hdev, __u8 event);
1940 
1941 u32 hci_conn_get_phy(struct hci_conn *conn);
1942 
1943 /* ----- HCI Sockets ----- */
1944 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1945 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
1946 			 int flag, struct sock *skip_sk);
1947 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1948 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
1949 				 void *data, u16 data_len, ktime_t tstamp,
1950 				 int flag, struct sock *skip_sk);
1951 
1952 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1953 
1954 #define HCI_MGMT_VAR_LEN	BIT(0)
1955 #define HCI_MGMT_NO_HDEV	BIT(1)
1956 #define HCI_MGMT_UNTRUSTED	BIT(2)
1957 #define HCI_MGMT_UNCONFIGURED	BIT(3)
1958 #define HCI_MGMT_HDEV_OPTIONAL	BIT(4)
1959 
1960 struct hci_mgmt_handler {
1961 	int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
1962 		     u16 data_len);
1963 	size_t data_len;
1964 	unsigned long flags;
1965 };
1966 
1967 struct hci_mgmt_chan {
1968 	struct list_head list;
1969 	unsigned short channel;
1970 	size_t handler_count;
1971 	const struct hci_mgmt_handler *handlers;
1972 	void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
1973 };
1974 
1975 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);
1976 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c);
1977 
1978 /* Management interface */
1979 #define DISCOV_TYPE_BREDR		(BIT(BDADDR_BREDR))
1980 #define DISCOV_TYPE_LE			(BIT(BDADDR_LE_PUBLIC) | \
1981 					 BIT(BDADDR_LE_RANDOM))
1982 #define DISCOV_TYPE_INTERLEAVED		(BIT(BDADDR_BREDR) | \
1983 					 BIT(BDADDR_LE_PUBLIC) | \
1984 					 BIT(BDADDR_LE_RANDOM))
1985 
1986 /* These LE scan and inquiry parameters were chosen according to LE General
1987  * Discovery Procedure specification.
1988  */
1989 #define DISCOV_LE_SCAN_WIN		0x12
1990 #define DISCOV_LE_SCAN_INT		0x12
1991 #define DISCOV_LE_TIMEOUT		10240	/* msec */
1992 #define DISCOV_INTERLEAVED_TIMEOUT	5120	/* msec */
1993 #define DISCOV_INTERLEAVED_INQUIRY_LEN	0x04
1994 #define DISCOV_BREDR_INQUIRY_LEN	0x08
1995 #define DISCOV_LE_RESTART_DELAY		msecs_to_jiffies(200)	/* msec */
1996 #define DISCOV_LE_FAST_ADV_INT_MIN	0x00A0	/* 100 msec */
1997 #define DISCOV_LE_FAST_ADV_INT_MAX	0x00F0	/* 150 msec */
1998 #define DISCOV_LE_PER_ADV_INT_MIN	0x00A0	/* 200 msec */
1999 #define DISCOV_LE_PER_ADV_INT_MAX	0x00A0	/* 200 msec */
2000 
2001 #define NAME_RESOLVE_DURATION		msecs_to_jiffies(10240)	/* 10.24 sec */
2002 
2003 void mgmt_fill_version_info(void *ver);
2004 int mgmt_new_settings(struct hci_dev *hdev);
2005 void mgmt_index_added(struct hci_dev *hdev);
2006 void mgmt_index_removed(struct hci_dev *hdev);
2007 void mgmt_set_powered_failed(struct hci_dev *hdev, int err);
2008 void mgmt_power_on(struct hci_dev *hdev, int err);
2009 void __mgmt_power_off(struct hci_dev *hdev);
2010 void mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
2011 		       bool persistent);
2012 void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
2013 			   u8 *name, u8 name_len);
2014 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
2015 			      u8 link_type, u8 addr_type, u8 reason,
2016 			      bool mgmt_connected);
2017 void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
2018 			    u8 link_type, u8 addr_type, u8 status);
2019 void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2020 			 u8 addr_type, u8 status);
2021 void mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
2022 void mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2023 				  u8 status);
2024 void mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2025 				      u8 status);
2026 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2027 			      u8 link_type, u8 addr_type, u32 value,
2028 			      u8 confirm_hint);
2029 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2030 				     u8 link_type, u8 addr_type, u8 status);
2031 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2032 					 u8 link_type, u8 addr_type, u8 status);
2033 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
2034 			      u8 link_type, u8 addr_type);
2035 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2036 				     u8 link_type, u8 addr_type, u8 status);
2037 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
2038 					 u8 link_type, u8 addr_type, u8 status);
2039 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
2040 			     u8 link_type, u8 addr_type, u32 passkey,
2041 			     u8 entered);
2042 void mgmt_auth_failed(struct hci_conn *conn, u8 status);
2043 void mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
2044 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
2045 				    u8 status);
2046 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
2047 void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
2048 void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
2049 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2050 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
2051 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
2052 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
2053 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
2054 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
2055 void mgmt_suspending(struct hci_dev *hdev, u8 state);
2056 void mgmt_resuming(struct hci_dev *hdev, u8 reason, bdaddr_t *bdaddr,
2057 		   u8 addr_type);
2058 bool mgmt_powering_down(struct hci_dev *hdev);
2059 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
2060 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk, bool persistent);
2061 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
2062 		   bool persistent);
2063 void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
2064 			 u8 bdaddr_type, u8 store_hint, u16 min_interval,
2065 			 u16 max_interval, u16 latency, u16 timeout);
2066 void mgmt_smp_complete(struct hci_conn *conn, bool complete);
2067 bool mgmt_get_connectable(struct hci_dev *hdev);
2068 u8 mgmt_get_adv_discov_flags(struct hci_dev *hdev);
2069 void mgmt_advertising_added(struct sock *sk, struct hci_dev *hdev,
2070 			    u8 instance);
2071 void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
2072 			      u8 instance);
2073 void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
2074 int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
2075 void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
2076 				  bdaddr_t *bdaddr, u8 addr_type);
2077 
2078 u8 hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max, u16 latency,
2079 		      u16 to_multiplier);
2080 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
2081 		      __u8 ltk[16], __u8 key_size);
2082 
2083 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2084 			       u8 *bdaddr_type);
2085 
2086 #define SCO_AIRMODE_MASK       0x0003
2087 #define SCO_AIRMODE_CVSD       0x0000
2088 #define SCO_AIRMODE_TRANSP     0x0003
2089 
2090 #define LOCAL_CODEC_ACL_MASK	BIT(0)
2091 #define LOCAL_CODEC_SCO_MASK	BIT(1)
2092 
2093 #define TRANSPORT_TYPE_MAX	0x04
2094 
2095 #endif /* __HCI_CORE_H */
2096