Merge remote-tracking branch 'lsk/v3.10/topic/big.LITTLE' into linux-linaro-lsk
[firefly-linux-kernel-4.4.55.git] / include / net / bluetooth / hci_core.h
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 <net/bluetooth/hci.h>
29
30 /* HCI priority */
31 #define HCI_PRIO_MAX    7
32
33 /* HCI Core structures */
34 struct inquiry_data {
35         bdaddr_t        bdaddr;
36         __u8            pscan_rep_mode;
37         __u8            pscan_period_mode;
38         __u8            pscan_mode;
39         __u8            dev_class[3];
40         __le16          clock_offset;
41         __s8            rssi;
42         __u8            ssp_mode;
43 };
44
45 struct inquiry_entry {
46         struct list_head        all;            /* inq_cache.all */
47         struct list_head        list;           /* unknown or resolve */
48         enum {
49                 NAME_NOT_KNOWN,
50                 NAME_NEEDED,
51                 NAME_PENDING,
52                 NAME_KNOWN,
53         } name_state;
54         __u32                   timestamp;
55         struct inquiry_data     data;
56 };
57
58 struct discovery_state {
59         int                     type;
60         enum {
61                 DISCOVERY_STOPPED,
62                 DISCOVERY_STARTING,
63                 DISCOVERY_FINDING,
64                 DISCOVERY_RESOLVING,
65                 DISCOVERY_STOPPING,
66         } state;
67         struct list_head        all;    /* All devices found during inquiry */
68         struct list_head        unknown;        /* Name state not known */
69         struct list_head        resolve;        /* Name needs to be resolved */
70         __u32                   timestamp;
71 };
72
73 struct hci_conn_hash {
74         struct list_head list;
75         unsigned int     acl_num;
76         unsigned int     amp_num;
77         unsigned int     sco_num;
78         unsigned int     le_num;
79 };
80
81 struct bdaddr_list {
82         struct list_head list;
83         bdaddr_t bdaddr;
84 };
85
86 struct bt_uuid {
87         struct list_head list;
88         u8 uuid[16];
89         u8 size;
90         u8 svc_hint;
91 };
92
93 struct smp_ltk {
94         struct list_head list;
95         bdaddr_t bdaddr;
96         u8 bdaddr_type;
97         u8 authenticated;
98         u8 type;
99         u8 enc_size;
100         __le16 ediv;
101         u8 rand[8];
102         u8 val[16];
103 } __packed;
104
105 struct link_key {
106         struct list_head list;
107         bdaddr_t bdaddr;
108         u8 type;
109         u8 val[HCI_LINK_KEY_SIZE];
110         u8 pin_len;
111 };
112
113 struct oob_data {
114         struct list_head list;
115         bdaddr_t bdaddr;
116         u8 hash[16];
117         u8 randomizer[16];
118 };
119
120 struct le_scan_params {
121         u8 type;
122         u16 interval;
123         u16 window;
124         int timeout;
125 };
126
127 #define HCI_MAX_SHORT_NAME_LENGTH       10
128
129 struct amp_assoc {
130         __u16   len;
131         __u16   offset;
132         __u16   rem_len;
133         __u16   len_so_far;
134         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
135 };
136
137 #define HCI_MAX_PAGES   3
138
139 #define NUM_REASSEMBLY 4
140 struct hci_dev {
141         struct list_head list;
142         struct mutex    lock;
143
144         char            name[8];
145         unsigned long   flags;
146         __u16           id;
147         __u8            bus;
148         __u8            dev_type;
149         bdaddr_t        bdaddr;
150         __u8            dev_name[HCI_MAX_NAME_LENGTH];
151         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
152         __u8            eir[HCI_MAX_EIR_LENGTH];
153         __u8            dev_class[3];
154         __u8            major_class;
155         __u8            minor_class;
156         __u8            max_page;
157         __u8            features[HCI_MAX_PAGES][8];
158         __u8            le_features[8];
159         __u8            le_white_list_size;
160         __u8            le_states[8];
161         __u8            commands[64];
162         __u8            hci_ver;
163         __u16           hci_rev;
164         __u8            lmp_ver;
165         __u16           manufacturer;
166         __u16           lmp_subver;
167         __u16           voice_setting;
168         __u8            io_capability;
169         __s8            inq_tx_power;
170         __u16           page_scan_interval;
171         __u16           page_scan_window;
172         __u8            page_scan_type;
173
174         __u16           devid_source;
175         __u16           devid_vendor;
176         __u16           devid_product;
177         __u16           devid_version;
178
179         __u16           pkt_type;
180         __u16           esco_type;
181         __u16           link_policy;
182         __u16           link_mode;
183
184         __u32           idle_timeout;
185         __u16           sniff_min_interval;
186         __u16           sniff_max_interval;
187
188         __u8            amp_status;
189         __u32           amp_total_bw;
190         __u32           amp_max_bw;
191         __u32           amp_min_latency;
192         __u32           amp_max_pdu;
193         __u8            amp_type;
194         __u16           amp_pal_cap;
195         __u16           amp_assoc_size;
196         __u32           amp_max_flush_to;
197         __u32           amp_be_flush_to;
198
199         struct amp_assoc        loc_assoc;
200
201         __u8            flow_ctl_mode;
202
203         unsigned int    auto_accept_delay;
204
205         unsigned long   quirks;
206
207         atomic_t        cmd_cnt;
208         unsigned int    acl_cnt;
209         unsigned int    sco_cnt;
210         unsigned int    le_cnt;
211
212         unsigned int    acl_mtu;
213         unsigned int    sco_mtu;
214         unsigned int    le_mtu;
215         unsigned int    acl_pkts;
216         unsigned int    sco_pkts;
217         unsigned int    le_pkts;
218
219         __u16           block_len;
220         __u16           block_mtu;
221         __u16           num_blocks;
222         __u16           block_cnt;
223
224         unsigned long   acl_last_tx;
225         unsigned long   sco_last_tx;
226         unsigned long   le_last_tx;
227
228         struct workqueue_struct *workqueue;
229         struct workqueue_struct *req_workqueue;
230
231         struct work_struct      power_on;
232         struct delayed_work     power_off;
233
234         __u16                   discov_timeout;
235         struct delayed_work     discov_off;
236
237         struct delayed_work     service_cache;
238
239         struct timer_list       cmd_timer;
240
241         struct work_struct      rx_work;
242         struct work_struct      cmd_work;
243         struct work_struct      tx_work;
244
245         struct sk_buff_head     rx_q;
246         struct sk_buff_head     raw_q;
247         struct sk_buff_head     cmd_q;
248
249         struct sk_buff          *recv_evt;
250         struct sk_buff          *sent_cmd;
251         struct sk_buff          *reassembly[NUM_REASSEMBLY];
252
253         struct mutex            req_lock;
254         wait_queue_head_t       req_wait_q;
255         __u32                   req_status;
256         __u32                   req_result;
257
258         struct list_head        mgmt_pending;
259
260         struct discovery_state  discovery;
261         struct hci_conn_hash    conn_hash;
262         struct list_head        blacklist;
263
264         struct list_head        uuids;
265
266         struct list_head        link_keys;
267
268         struct list_head        long_term_keys;
269
270         struct list_head        remote_oob_data;
271
272         struct hci_dev_stats    stat;
273
274         atomic_t                promisc;
275
276         struct dentry           *debugfs;
277
278         struct device           dev;
279
280         struct rfkill           *rfkill;
281
282         unsigned long           dev_flags;
283
284         struct delayed_work     le_scan_disable;
285
286         struct work_struct      le_scan;
287         struct le_scan_params   le_scan_params;
288
289         __s8                    adv_tx_power;
290         __u8                    adv_data[HCI_MAX_AD_LENGTH];
291         __u8                    adv_data_len;
292
293         int (*open)(struct hci_dev *hdev);
294         int (*close)(struct hci_dev *hdev);
295         int (*flush)(struct hci_dev *hdev);
296         int (*setup)(struct hci_dev *hdev);
297         int (*send)(struct sk_buff *skb);
298         void (*notify)(struct hci_dev *hdev, unsigned int evt);
299         int (*ioctl)(struct hci_dev *hdev, unsigned int cmd, unsigned long arg);
300 };
301
302 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
303
304 struct hci_conn {
305         struct list_head list;
306
307         atomic_t        refcnt;
308
309         bdaddr_t        dst;
310         __u8            dst_type;
311         __u16           handle;
312         __u16           state;
313         __u8            mode;
314         __u8            type;
315         bool            out;
316         __u8            attempt;
317         __u8            dev_class[3];
318         __u8            features[HCI_MAX_PAGES][8];
319         __u16           interval;
320         __u16           pkt_type;
321         __u16           link_policy;
322         __u32           link_mode;
323         __u8            key_type;
324         __u8            auth_type;
325         __u8            sec_level;
326         __u8            pending_sec_level;
327         __u8            pin_length;
328         __u8            enc_key_size;
329         __u8            io_capability;
330         __u32           passkey_notify;
331         __u8            passkey_entered;
332         __u16           disc_timeout;
333         unsigned long   flags;
334
335         __u8            remote_cap;
336         __u8            remote_auth;
337         __u8            remote_id;
338         bool            flush_key;
339
340         unsigned int    sent;
341
342         struct sk_buff_head data_q;
343         struct list_head chan_list;
344
345         struct delayed_work disc_work;
346         struct timer_list idle_timer;
347         struct timer_list auto_accept_timer;
348
349         struct device   dev;
350
351         struct hci_dev  *hdev;
352         void            *l2cap_data;
353         void            *sco_data;
354         void            *smp_conn;
355         struct amp_mgr  *amp_mgr;
356
357         struct hci_conn *link;
358
359         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
360         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
361         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
362 };
363
364 struct hci_chan {
365         struct list_head list;
366         __u16 handle;
367         struct hci_conn *conn;
368         struct sk_buff_head data_q;
369         unsigned int    sent;
370         __u8            state;
371 };
372
373 extern struct list_head hci_dev_list;
374 extern struct list_head hci_cb_list;
375 extern rwlock_t hci_dev_list_lock;
376 extern rwlock_t hci_cb_list_lock;
377
378 /* ----- HCI interface to upper protocols ----- */
379 extern int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
380 extern void l2cap_connect_cfm(struct hci_conn *hcon, u8 status);
381 extern int l2cap_disconn_ind(struct hci_conn *hcon);
382 extern void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason);
383 extern int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt);
384 extern int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb,
385                               u16 flags);
386
387 extern int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
388 extern void sco_connect_cfm(struct hci_conn *hcon, __u8 status);
389 extern void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason);
390 extern int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
391
392 /* ----- Inquiry cache ----- */
393 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
394 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
395
396 static inline void discovery_init(struct hci_dev *hdev)
397 {
398         hdev->discovery.state = DISCOVERY_STOPPED;
399         INIT_LIST_HEAD(&hdev->discovery.all);
400         INIT_LIST_HEAD(&hdev->discovery.unknown);
401         INIT_LIST_HEAD(&hdev->discovery.resolve);
402 }
403
404 bool hci_discovery_active(struct hci_dev *hdev);
405
406 void hci_discovery_set_state(struct hci_dev *hdev, int state);
407
408 static inline int inquiry_cache_empty(struct hci_dev *hdev)
409 {
410         return list_empty(&hdev->discovery.all);
411 }
412
413 static inline long inquiry_cache_age(struct hci_dev *hdev)
414 {
415         struct discovery_state *c = &hdev->discovery;
416         return jiffies - c->timestamp;
417 }
418
419 static inline long inquiry_entry_age(struct inquiry_entry *e)
420 {
421         return jiffies - e->timestamp;
422 }
423
424 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
425                                                bdaddr_t *bdaddr);
426 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
427                                                        bdaddr_t *bdaddr);
428 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
429                                                        bdaddr_t *bdaddr,
430                                                        int state);
431 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
432                                       struct inquiry_entry *ie);
433 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
434                               bool name_known, bool *ssp);
435
436 /* ----- HCI Connections ----- */
437 enum {
438         HCI_CONN_AUTH_PEND,
439         HCI_CONN_REAUTH_PEND,
440         HCI_CONN_ENCRYPT_PEND,
441         HCI_CONN_RSWITCH_PEND,
442         HCI_CONN_MODE_CHANGE_PEND,
443         HCI_CONN_SCO_SETUP_PEND,
444         HCI_CONN_LE_SMP_PEND,
445         HCI_CONN_MGMT_CONNECTED,
446         HCI_CONN_SSP_ENABLED,
447         HCI_CONN_POWER_SAVE,
448         HCI_CONN_REMOTE_OOB,
449 };
450
451 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
452 {
453         struct hci_dev *hdev = conn->hdev;
454         return test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
455                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
456 }
457
458 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
459 {
460         struct hci_conn_hash *h = &hdev->conn_hash;
461         list_add_rcu(&c->list, &h->list);
462         switch (c->type) {
463         case ACL_LINK:
464                 h->acl_num++;
465                 break;
466         case AMP_LINK:
467                 h->amp_num++;
468                 break;
469         case LE_LINK:
470                 h->le_num++;
471                 break;
472         case SCO_LINK:
473         case ESCO_LINK:
474                 h->sco_num++;
475                 break;
476         }
477 }
478
479 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
480 {
481         struct hci_conn_hash *h = &hdev->conn_hash;
482
483         list_del_rcu(&c->list);
484         synchronize_rcu();
485
486         switch (c->type) {
487         case ACL_LINK:
488                 h->acl_num--;
489                 break;
490         case AMP_LINK:
491                 h->amp_num--;
492                 break;
493         case LE_LINK:
494                 h->le_num--;
495                 break;
496         case SCO_LINK:
497         case ESCO_LINK:
498                 h->sco_num--;
499                 break;
500         }
501 }
502
503 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
504 {
505         struct hci_conn_hash *h = &hdev->conn_hash;
506         switch (type) {
507         case ACL_LINK:
508                 return h->acl_num;
509         case AMP_LINK:
510                 return h->amp_num;
511         case LE_LINK:
512                 return h->le_num;
513         case SCO_LINK:
514         case ESCO_LINK:
515                 return h->sco_num;
516         default:
517                 return 0;
518         }
519 }
520
521 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
522                                                                 __u16 handle)
523 {
524         struct hci_conn_hash *h = &hdev->conn_hash;
525         struct hci_conn  *c;
526
527         rcu_read_lock();
528
529         list_for_each_entry_rcu(c, &h->list, list) {
530                 if (c->handle == handle) {
531                         rcu_read_unlock();
532                         return c;
533                 }
534         }
535         rcu_read_unlock();
536
537         return NULL;
538 }
539
540 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
541                                                         __u8 type, bdaddr_t *ba)
542 {
543         struct hci_conn_hash *h = &hdev->conn_hash;
544         struct hci_conn  *c;
545
546         rcu_read_lock();
547
548         list_for_each_entry_rcu(c, &h->list, list) {
549                 if (c->type == type && !bacmp(&c->dst, ba)) {
550                         rcu_read_unlock();
551                         return c;
552                 }
553         }
554
555         rcu_read_unlock();
556
557         return NULL;
558 }
559
560 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
561                                                         __u8 type, __u16 state)
562 {
563         struct hci_conn_hash *h = &hdev->conn_hash;
564         struct hci_conn  *c;
565
566         rcu_read_lock();
567
568         list_for_each_entry_rcu(c, &h->list, list) {
569                 if (c->type == type && c->state == state) {
570                         rcu_read_unlock();
571                         return c;
572                 }
573         }
574
575         rcu_read_unlock();
576
577         return NULL;
578 }
579
580 void hci_disconnect(struct hci_conn *conn, __u8 reason);
581 void hci_setup_sync(struct hci_conn *conn, __u16 handle);
582 void hci_sco_setup(struct hci_conn *conn, __u8 status);
583
584 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst);
585 int hci_conn_del(struct hci_conn *conn);
586 void hci_conn_hash_flush(struct hci_dev *hdev);
587 void hci_conn_check_pending(struct hci_dev *hdev);
588
589 struct hci_chan *hci_chan_create(struct hci_conn *conn);
590 void hci_chan_del(struct hci_chan *chan);
591 void hci_chan_list_flush(struct hci_conn *conn);
592 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
593
594 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
595                              __u8 dst_type, __u8 sec_level, __u8 auth_type);
596 int hci_conn_check_link_mode(struct hci_conn *conn);
597 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
598 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type);
599 int hci_conn_change_link_key(struct hci_conn *conn);
600 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
601
602 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
603
604 /*
605  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
606  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
607  * working or anything else. They just guarantee that the object is available
608  * and can be dereferenced. So you can use its locks, local variables and any
609  * other constant data.
610  * Before accessing runtime data, you _must_ lock the object and then check that
611  * it is still running. As soon as you release the locks, the connection might
612  * get dropped, though.
613  *
614  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
615  * how long the underlying connection is held. So every channel that runs on the
616  * hci_conn object calls this to prevent the connection from disappearing. As
617  * long as you hold a device, you must also guarantee that you have a valid
618  * reference to the device via hci_conn_get() (or the initial reference from
619  * hci_conn_add()).
620  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
621  * break because nobody cares for that. But this means, we cannot use
622  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
623  */
624
625 static inline void hci_conn_get(struct hci_conn *conn)
626 {
627         get_device(&conn->dev);
628 }
629
630 static inline void hci_conn_put(struct hci_conn *conn)
631 {
632         put_device(&conn->dev);
633 }
634
635 static inline void hci_conn_hold(struct hci_conn *conn)
636 {
637         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
638
639         atomic_inc(&conn->refcnt);
640         cancel_delayed_work(&conn->disc_work);
641 }
642
643 static inline void hci_conn_drop(struct hci_conn *conn)
644 {
645         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
646
647         if (atomic_dec_and_test(&conn->refcnt)) {
648                 unsigned long timeo;
649
650                 switch (conn->type) {
651                 case ACL_LINK:
652                 case LE_LINK:
653                         del_timer(&conn->idle_timer);
654                         if (conn->state == BT_CONNECTED) {
655                                 timeo = conn->disc_timeout;
656                                 if (!conn->out)
657                                         timeo *= 2;
658                         } else {
659                                 timeo = msecs_to_jiffies(10);
660                         }
661                         break;
662
663                 case AMP_LINK:
664                         timeo = conn->disc_timeout;
665                         break;
666
667                 default:
668                         timeo = msecs_to_jiffies(10);
669                         break;
670                 }
671
672                 cancel_delayed_work(&conn->disc_work);
673                 queue_delayed_work(conn->hdev->workqueue,
674                                    &conn->disc_work, timeo);
675         }
676 }
677
678 /* ----- HCI Devices ----- */
679 static inline void hci_dev_put(struct hci_dev *d)
680 {
681         BT_DBG("%s orig refcnt %d", d->name,
682                atomic_read(&d->dev.kobj.kref.refcount));
683
684         put_device(&d->dev);
685 }
686
687 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
688 {
689         BT_DBG("%s orig refcnt %d", d->name,
690                atomic_read(&d->dev.kobj.kref.refcount));
691
692         get_device(&d->dev);
693         return d;
694 }
695
696 #define hci_dev_lock(d)         mutex_lock(&d->lock)
697 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
698
699 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
700 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
701
702 static inline void *hci_get_drvdata(struct hci_dev *hdev)
703 {
704         return dev_get_drvdata(&hdev->dev);
705 }
706
707 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
708 {
709         dev_set_drvdata(&hdev->dev, data);
710 }
711
712 /* hci_dev_list shall be locked */
713 static inline uint8_t __hci_num_ctrl(void)
714 {
715         uint8_t count = 0;
716         struct list_head *p;
717
718         list_for_each(p, &hci_dev_list) {
719                 count++;
720         }
721
722         return count;
723 }
724
725 struct hci_dev *hci_dev_get(int index);
726 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
727
728 struct hci_dev *hci_alloc_dev(void);
729 void hci_free_dev(struct hci_dev *hdev);
730 int hci_register_dev(struct hci_dev *hdev);
731 void hci_unregister_dev(struct hci_dev *hdev);
732 int hci_suspend_dev(struct hci_dev *hdev);
733 int hci_resume_dev(struct hci_dev *hdev);
734 int hci_dev_open(__u16 dev);
735 int hci_dev_close(__u16 dev);
736 int hci_dev_reset(__u16 dev);
737 int hci_dev_reset_stat(__u16 dev);
738 int hci_dev_cmd(unsigned int cmd, void __user *arg);
739 int hci_get_dev_list(void __user *arg);
740 int hci_get_dev_info(void __user *arg);
741 int hci_get_conn_list(void __user *arg);
742 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
743 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
744 int hci_inquiry(void __user *arg);
745
746 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
747                                          bdaddr_t *bdaddr);
748 int hci_blacklist_clear(struct hci_dev *hdev);
749 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
750 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
751
752 int hci_uuids_clear(struct hci_dev *hdev);
753
754 int hci_link_keys_clear(struct hci_dev *hdev);
755 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
756 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
757                      bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len);
758 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]);
759 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
760                 int new_key, u8 authenticated, u8 tk[16], u8 enc_size,
761                 __le16 ediv, u8 rand[8]);
762 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
763                                      u8 addr_type);
764 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr);
765 int hci_smp_ltks_clear(struct hci_dev *hdev);
766 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
767
768 int hci_remote_oob_data_clear(struct hci_dev *hdev);
769 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
770                                                         bdaddr_t *bdaddr);
771 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
772                                                                 u8 *randomizer);
773 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr);
774
775 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
776
777 int hci_recv_frame(struct sk_buff *skb);
778 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count);
779 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
780
781 void hci_init_sysfs(struct hci_dev *hdev);
782 int hci_add_sysfs(struct hci_dev *hdev);
783 void hci_del_sysfs(struct hci_dev *hdev);
784 void hci_conn_init_sysfs(struct hci_conn *conn);
785 void hci_conn_add_sysfs(struct hci_conn *conn);
786 void hci_conn_del_sysfs(struct hci_conn *conn);
787
788 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
789
790 /* ----- LMP capabilities ----- */
791 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
792 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
793 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
794 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
795 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
796 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
797 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
798 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
799 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
800 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
801 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
802 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
803 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
804 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
805 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
806 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
807 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
808 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
809
810 /* ----- Extended LMP capabilities ----- */
811 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
812 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
813 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
814
815 /* returns true if at least one AMP active */
816 static inline bool hci_amp_capable(void)
817 {
818         struct hci_dev *hdev;
819         bool ret = false;
820
821         read_lock(&hci_dev_list_lock);
822         list_for_each_entry(hdev, &hci_dev_list, list)
823                 if (hdev->amp_type == HCI_AMP &&
824                     test_bit(HCI_UP, &hdev->flags))
825                         ret = true;
826         read_unlock(&hci_dev_list_lock);
827
828         return ret;
829 }
830
831 /* ----- HCI protocols ----- */
832 #define HCI_PROTO_DEFER             0x01
833
834 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
835                                         __u8 type, __u8 *flags)
836 {
837         switch (type) {
838         case ACL_LINK:
839                 return l2cap_connect_ind(hdev, bdaddr);
840
841         case SCO_LINK:
842         case ESCO_LINK:
843                 return sco_connect_ind(hdev, bdaddr, flags);
844
845         default:
846                 BT_ERR("unknown link type %d", type);
847                 return -EINVAL;
848         }
849 }
850
851 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
852 {
853         switch (conn->type) {
854         case ACL_LINK:
855         case LE_LINK:
856                 l2cap_connect_cfm(conn, status);
857                 break;
858
859         case SCO_LINK:
860         case ESCO_LINK:
861                 sco_connect_cfm(conn, status);
862                 break;
863
864         default:
865                 BT_ERR("unknown link type %d", conn->type);
866                 break;
867         }
868
869         if (conn->connect_cfm_cb)
870                 conn->connect_cfm_cb(conn, status);
871 }
872
873 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
874 {
875         if (conn->type != ACL_LINK && conn->type != LE_LINK)
876                 return HCI_ERROR_REMOTE_USER_TERM;
877
878         return l2cap_disconn_ind(conn);
879 }
880
881 static inline void hci_proto_disconn_cfm(struct hci_conn *conn, __u8 reason)
882 {
883         switch (conn->type) {
884         case ACL_LINK:
885         case LE_LINK:
886                 l2cap_disconn_cfm(conn, reason);
887                 break;
888
889         case SCO_LINK:
890         case ESCO_LINK:
891                 sco_disconn_cfm(conn, reason);
892                 break;
893
894         /* L2CAP would be handled for BREDR chan */
895         case AMP_LINK:
896                 break;
897
898         default:
899                 BT_ERR("unknown link type %d", conn->type);
900                 break;
901         }
902
903         if (conn->disconn_cfm_cb)
904                 conn->disconn_cfm_cb(conn, reason);
905 }
906
907 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
908 {
909         __u8 encrypt;
910
911         if (conn->type != ACL_LINK && conn->type != LE_LINK)
912                 return;
913
914         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
915                 return;
916
917         encrypt = (conn->link_mode & HCI_LM_ENCRYPT) ? 0x01 : 0x00;
918         l2cap_security_cfm(conn, status, encrypt);
919
920         if (conn->security_cfm_cb)
921                 conn->security_cfm_cb(conn, status);
922 }
923
924 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status,
925                                                                 __u8 encrypt)
926 {
927         if (conn->type != ACL_LINK && conn->type != LE_LINK)
928                 return;
929
930         l2cap_security_cfm(conn, status, encrypt);
931
932         if (conn->security_cfm_cb)
933                 conn->security_cfm_cb(conn, status);
934 }
935
936 /* ----- HCI callbacks ----- */
937 struct hci_cb {
938         struct list_head list;
939
940         char *name;
941
942         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
943                                                                 __u8 encrypt);
944         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
945         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
946 };
947
948 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
949 {
950         struct hci_cb *cb;
951         __u8 encrypt;
952
953         hci_proto_auth_cfm(conn, status);
954
955         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
956                 return;
957
958         encrypt = (conn->link_mode & HCI_LM_ENCRYPT) ? 0x01 : 0x00;
959
960         read_lock(&hci_cb_list_lock);
961         list_for_each_entry(cb, &hci_cb_list, list) {
962                 if (cb->security_cfm)
963                         cb->security_cfm(conn, status, encrypt);
964         }
965         read_unlock(&hci_cb_list_lock);
966 }
967
968 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
969                                                                 __u8 encrypt)
970 {
971         struct hci_cb *cb;
972
973         if (conn->sec_level == BT_SECURITY_SDP)
974                 conn->sec_level = BT_SECURITY_LOW;
975
976         if (conn->pending_sec_level > conn->sec_level)
977                 conn->sec_level = conn->pending_sec_level;
978
979         hci_proto_encrypt_cfm(conn, status, encrypt);
980
981         read_lock(&hci_cb_list_lock);
982         list_for_each_entry(cb, &hci_cb_list, list) {
983                 if (cb->security_cfm)
984                         cb->security_cfm(conn, status, encrypt);
985         }
986         read_unlock(&hci_cb_list_lock);
987 }
988
989 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
990 {
991         struct hci_cb *cb;
992
993         read_lock(&hci_cb_list_lock);
994         list_for_each_entry(cb, &hci_cb_list, list) {
995                 if (cb->key_change_cfm)
996                         cb->key_change_cfm(conn, status);
997         }
998         read_unlock(&hci_cb_list_lock);
999 }
1000
1001 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
1002                                                                 __u8 role)
1003 {
1004         struct hci_cb *cb;
1005
1006         read_lock(&hci_cb_list_lock);
1007         list_for_each_entry(cb, &hci_cb_list, list) {
1008                 if (cb->role_switch_cfm)
1009                         cb->role_switch_cfm(conn, status, role);
1010         }
1011         read_unlock(&hci_cb_list_lock);
1012 }
1013
1014 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
1015 {
1016         size_t parsed = 0;
1017
1018         if (data_len < 2)
1019                 return false;
1020
1021         while (parsed < data_len - 1) {
1022                 u8 field_len = data[0];
1023
1024                 if (field_len == 0)
1025                         break;
1026
1027                 parsed += field_len + 1;
1028
1029                 if (parsed > data_len)
1030                         break;
1031
1032                 if (data[1] == type)
1033                         return true;
1034
1035                 data += field_len + 1;
1036         }
1037
1038         return false;
1039 }
1040
1041 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
1042 {
1043         size_t parsed = 0;
1044
1045         while (parsed < eir_len) {
1046                 u8 field_len = eir[0];
1047
1048                 if (field_len == 0)
1049                         return parsed;
1050
1051                 parsed += field_len + 1;
1052                 eir += field_len + 1;
1053         }
1054
1055         return eir_len;
1056 }
1057
1058 static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
1059                                   u8 data_len)
1060 {
1061         eir[eir_len++] = sizeof(type) + data_len;
1062         eir[eir_len++] = type;
1063         memcpy(&eir[eir_len], data, data_len);
1064         eir_len += data_len;
1065
1066         return eir_len;
1067 }
1068
1069 int hci_register_cb(struct hci_cb *hcb);
1070 int hci_unregister_cb(struct hci_cb *hcb);
1071
1072 struct hci_request {
1073         struct hci_dev          *hdev;
1074         struct sk_buff_head     cmd_q;
1075
1076         /* If something goes wrong when building the HCI request, the error
1077          * value is stored in this field.
1078          */
1079         int                     err;
1080 };
1081
1082 void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
1083 int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
1084 void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
1085                  const void *param);
1086 void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
1087                     const void *param, u8 event);
1088 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);
1089
1090 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1091                                const void *param, u32 timeout);
1092 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1093                                   const void *param, u8 event, u32 timeout);
1094
1095 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1096                  const void *param);
1097 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1098 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1099
1100 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1101
1102 /* ----- HCI Sockets ----- */
1103 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1104 void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk);
1105 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1106
1107 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1108
1109 /* Management interface */
1110 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1111 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1112                                          BIT(BDADDR_LE_RANDOM))
1113 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1114                                          BIT(BDADDR_LE_PUBLIC) | \
1115                                          BIT(BDADDR_LE_RANDOM))
1116
1117 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
1118 int mgmt_index_added(struct hci_dev *hdev);
1119 int mgmt_index_removed(struct hci_dev *hdev);
1120 int mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1121 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1122 int mgmt_discoverable(struct hci_dev *hdev, u8 discoverable);
1123 int mgmt_connectable(struct hci_dev *hdev, u8 connectable);
1124 int mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status);
1125 int mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1126                       bool persistent);
1127 int mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1128                           u8 addr_type, u32 flags, u8 *name, u8 name_len,
1129                           u8 *dev_class);
1130 int mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1131                              u8 link_type, u8 addr_type, u8 reason);
1132 int mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1133                            u8 link_type, u8 addr_type, u8 status);
1134 int mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1135                         u8 addr_type, u8 status);
1136 int mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1137 int mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1138                                  u8 status);
1139 int mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1140                                      u8 status);
1141 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1142                               u8 link_type, u8 addr_type, __le32 value,
1143                               u8 confirm_hint);
1144 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1145                                      u8 link_type, u8 addr_type, u8 status);
1146 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1147                                          u8 link_type, u8 addr_type, u8 status);
1148 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1149                               u8 link_type, u8 addr_type);
1150 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1151                                      u8 link_type, u8 addr_type, u8 status);
1152 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1153                                          u8 link_type, u8 addr_type, u8 status);
1154 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1155                              u8 link_type, u8 addr_type, u32 passkey,
1156                              u8 entered);
1157 int mgmt_auth_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1158                      u8 addr_type, u8 status);
1159 int mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1160 int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1161 int mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1162                                    u8 status);
1163 int mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1164 int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
1165                                             u8 *randomizer, u8 status);
1166 int mgmt_le_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1167 int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1168                       u8 addr_type, u8 *dev_class, s8 rssi, u8 cfm_name,
1169                       u8 ssp, u8 *eir, u16 eir_len);
1170 int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1171                      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1172 int mgmt_start_discovery_failed(struct hci_dev *hdev, u8 status);
1173 int mgmt_stop_discovery_failed(struct hci_dev *hdev, u8 status);
1174 int mgmt_discovering(struct hci_dev *hdev, u8 discovering);
1175 int mgmt_interleaved_discovery(struct hci_dev *hdev);
1176 int mgmt_device_blocked(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1177 int mgmt_device_unblocked(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
1178 bool mgmt_valid_hdev(struct hci_dev *hdev);
1179 int mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, u8 persistent);
1180
1181 /* HCI info for socket */
1182 #define hci_pi(sk) ((struct hci_pinfo *) sk)
1183
1184 struct hci_pinfo {
1185         struct bt_sock    bt;
1186         struct hci_dev    *hdev;
1187         struct hci_filter filter;
1188         __u32             cmsg_mask;
1189         unsigned short   channel;
1190 };
1191
1192 /* HCI security filter */
1193 #define HCI_SFLT_MAX_OGF  5
1194
1195 struct hci_sec_filter {
1196         __u32 type_mask;
1197         __u32 event_mask[2];
1198         __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
1199 };
1200
1201 /* ----- HCI requests ----- */
1202 #define HCI_REQ_DONE      0
1203 #define HCI_REQ_PEND      1
1204 #define HCI_REQ_CANCELED  2
1205
1206 #define hci_req_lock(d)         mutex_lock(&d->req_lock)
1207 #define hci_req_unlock(d)       mutex_unlock(&d->req_lock)
1208
1209 void hci_update_ad(struct hci_request *req);
1210
1211 void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
1212                                         u16 latency, u16 to_multiplier);
1213 void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
1214                                                         __u8 ltk[16]);
1215 int hci_do_inquiry(struct hci_dev *hdev, u8 length);
1216 int hci_cancel_inquiry(struct hci_dev *hdev);
1217 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1218                 int timeout);
1219 int hci_cancel_le_scan(struct hci_dev *hdev);
1220
1221 u8 bdaddr_to_le(u8 bdaddr_type);
1222
1223 #endif /* __HCI_CORE_H */