Bluetooth: Add constants for SCO airmode
[pandora-kernel.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 #define HCI_MAX_SHORT_NAME_LENGTH       10
121
122 struct amp_assoc {
123         __u16   len;
124         __u16   offset;
125         __u16   rem_len;
126         __u16   len_so_far;
127         __u8    data[HCI_MAX_AMP_ASSOC_SIZE];
128 };
129
130 #define HCI_MAX_PAGES   3
131
132 #define NUM_REASSEMBLY 4
133 struct hci_dev {
134         struct list_head list;
135         struct mutex    lock;
136
137         char            name[8];
138         unsigned long   flags;
139         __u16           id;
140         __u8            bus;
141         __u8            dev_type;
142         bdaddr_t        bdaddr;
143         __u8            dev_name[HCI_MAX_NAME_LENGTH];
144         __u8            short_name[HCI_MAX_SHORT_NAME_LENGTH];
145         __u8            eir[HCI_MAX_EIR_LENGTH];
146         __u8            dev_class[3];
147         __u8            major_class;
148         __u8            minor_class;
149         __u8            max_page;
150         __u8            features[HCI_MAX_PAGES][8];
151         __u8            le_features[8];
152         __u8            le_white_list_size;
153         __u8            le_states[8];
154         __u8            commands[64];
155         __u8            hci_ver;
156         __u16           hci_rev;
157         __u8            lmp_ver;
158         __u16           manufacturer;
159         __u16           lmp_subver;
160         __u16           voice_setting;
161         __u8            io_capability;
162         __s8            inq_tx_power;
163         __u16           page_scan_interval;
164         __u16           page_scan_window;
165         __u8            page_scan_type;
166
167         __u16           devid_source;
168         __u16           devid_vendor;
169         __u16           devid_product;
170         __u16           devid_version;
171
172         __u16           pkt_type;
173         __u16           esco_type;
174         __u16           link_policy;
175         __u16           link_mode;
176
177         __u32           idle_timeout;
178         __u16           sniff_min_interval;
179         __u16           sniff_max_interval;
180
181         __u8            amp_status;
182         __u32           amp_total_bw;
183         __u32           amp_max_bw;
184         __u32           amp_min_latency;
185         __u32           amp_max_pdu;
186         __u8            amp_type;
187         __u16           amp_pal_cap;
188         __u16           amp_assoc_size;
189         __u32           amp_max_flush_to;
190         __u32           amp_be_flush_to;
191
192         struct amp_assoc        loc_assoc;
193
194         __u8            flow_ctl_mode;
195
196         unsigned int    auto_accept_delay;
197
198         unsigned long   quirks;
199
200         atomic_t        cmd_cnt;
201         unsigned int    acl_cnt;
202         unsigned int    sco_cnt;
203         unsigned int    le_cnt;
204
205         unsigned int    acl_mtu;
206         unsigned int    sco_mtu;
207         unsigned int    le_mtu;
208         unsigned int    acl_pkts;
209         unsigned int    sco_pkts;
210         unsigned int    le_pkts;
211
212         __u16           block_len;
213         __u16           block_mtu;
214         __u16           num_blocks;
215         __u16           block_cnt;
216
217         unsigned long   acl_last_tx;
218         unsigned long   sco_last_tx;
219         unsigned long   le_last_tx;
220
221         struct workqueue_struct *workqueue;
222         struct workqueue_struct *req_workqueue;
223
224         struct work_struct      power_on;
225         struct delayed_work     power_off;
226
227         __u16                   discov_timeout;
228         struct delayed_work     discov_off;
229
230         struct delayed_work     service_cache;
231
232         struct timer_list       cmd_timer;
233
234         struct work_struct      rx_work;
235         struct work_struct      cmd_work;
236         struct work_struct      tx_work;
237
238         struct sk_buff_head     rx_q;
239         struct sk_buff_head     raw_q;
240         struct sk_buff_head     cmd_q;
241
242         struct sk_buff          *recv_evt;
243         struct sk_buff          *sent_cmd;
244         struct sk_buff          *reassembly[NUM_REASSEMBLY];
245
246         struct mutex            req_lock;
247         wait_queue_head_t       req_wait_q;
248         __u32                   req_status;
249         __u32                   req_result;
250
251         struct list_head        mgmt_pending;
252
253         struct discovery_state  discovery;
254         struct hci_conn_hash    conn_hash;
255         struct list_head        blacklist;
256
257         struct list_head        uuids;
258
259         struct list_head        link_keys;
260
261         struct list_head        long_term_keys;
262
263         struct list_head        remote_oob_data;
264
265         struct hci_dev_stats    stat;
266
267         atomic_t                promisc;
268
269         struct dentry           *debugfs;
270
271         struct device           dev;
272
273         struct rfkill           *rfkill;
274
275         unsigned long           dev_flags;
276
277         struct delayed_work     le_scan_disable;
278
279         __s8                    adv_tx_power;
280         __u8                    adv_data[HCI_MAX_AD_LENGTH];
281         __u8                    adv_data_len;
282
283         int (*open)(struct hci_dev *hdev);
284         int (*close)(struct hci_dev *hdev);
285         int (*flush)(struct hci_dev *hdev);
286         int (*setup)(struct hci_dev *hdev);
287         int (*send)(struct sk_buff *skb);
288         void (*notify)(struct hci_dev *hdev, unsigned int evt);
289         int (*ioctl)(struct hci_dev *hdev, unsigned int cmd, unsigned long arg);
290 };
291
292 #define HCI_PHY_HANDLE(handle)  (handle & 0xff)
293
294 struct hci_conn {
295         struct list_head list;
296
297         atomic_t        refcnt;
298
299         bdaddr_t        dst;
300         __u8            dst_type;
301         __u16           handle;
302         __u16           state;
303         __u8            mode;
304         __u8            type;
305         bool            out;
306         __u8            attempt;
307         __u8            dev_class[3];
308         __u8            features[HCI_MAX_PAGES][8];
309         __u16           interval;
310         __u16           pkt_type;
311         __u16           link_policy;
312         __u32           link_mode;
313         __u8            key_type;
314         __u8            auth_type;
315         __u8            sec_level;
316         __u8            pending_sec_level;
317         __u8            pin_length;
318         __u8            enc_key_size;
319         __u8            io_capability;
320         __u32           passkey_notify;
321         __u8            passkey_entered;
322         __u16           disc_timeout;
323         unsigned long   flags;
324
325         __u8            remote_cap;
326         __u8            remote_auth;
327         __u8            remote_id;
328         bool            flush_key;
329
330         unsigned int    sent;
331
332         struct sk_buff_head data_q;
333         struct list_head chan_list;
334
335         struct delayed_work disc_work;
336         struct timer_list idle_timer;
337         struct timer_list auto_accept_timer;
338
339         struct device   dev;
340
341         struct hci_dev  *hdev;
342         void            *l2cap_data;
343         void            *sco_data;
344         void            *smp_conn;
345         struct amp_mgr  *amp_mgr;
346
347         struct hci_conn *link;
348
349         void (*connect_cfm_cb)  (struct hci_conn *conn, u8 status);
350         void (*security_cfm_cb) (struct hci_conn *conn, u8 status);
351         void (*disconn_cfm_cb)  (struct hci_conn *conn, u8 reason);
352 };
353
354 struct hci_chan {
355         struct list_head list;
356         __u16 handle;
357         struct hci_conn *conn;
358         struct sk_buff_head data_q;
359         unsigned int    sent;
360         __u8            state;
361 };
362
363 extern struct list_head hci_dev_list;
364 extern struct list_head hci_cb_list;
365 extern rwlock_t hci_dev_list_lock;
366 extern rwlock_t hci_cb_list_lock;
367
368 /* ----- HCI interface to upper protocols ----- */
369 extern int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr);
370 extern void l2cap_connect_cfm(struct hci_conn *hcon, u8 status);
371 extern int l2cap_disconn_ind(struct hci_conn *hcon);
372 extern void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason);
373 extern int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt);
374 extern int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb,
375                               u16 flags);
376
377 extern int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags);
378 extern void sco_connect_cfm(struct hci_conn *hcon, __u8 status);
379 extern void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason);
380 extern int sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb);
381
382 /* ----- Inquiry cache ----- */
383 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   /* 30 seconds */
384 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   /* 60 seconds */
385
386 static inline void discovery_init(struct hci_dev *hdev)
387 {
388         hdev->discovery.state = DISCOVERY_STOPPED;
389         INIT_LIST_HEAD(&hdev->discovery.all);
390         INIT_LIST_HEAD(&hdev->discovery.unknown);
391         INIT_LIST_HEAD(&hdev->discovery.resolve);
392 }
393
394 bool hci_discovery_active(struct hci_dev *hdev);
395
396 void hci_discovery_set_state(struct hci_dev *hdev, int state);
397
398 static inline int inquiry_cache_empty(struct hci_dev *hdev)
399 {
400         return list_empty(&hdev->discovery.all);
401 }
402
403 static inline long inquiry_cache_age(struct hci_dev *hdev)
404 {
405         struct discovery_state *c = &hdev->discovery;
406         return jiffies - c->timestamp;
407 }
408
409 static inline long inquiry_entry_age(struct inquiry_entry *e)
410 {
411         return jiffies - e->timestamp;
412 }
413
414 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
415                                                bdaddr_t *bdaddr);
416 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
417                                                        bdaddr_t *bdaddr);
418 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
419                                                        bdaddr_t *bdaddr,
420                                                        int state);
421 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
422                                       struct inquiry_entry *ie);
423 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
424                               bool name_known, bool *ssp);
425 void hci_inquiry_cache_flush(struct hci_dev *hdev);
426
427 /* ----- HCI Connections ----- */
428 enum {
429         HCI_CONN_AUTH_PEND,
430         HCI_CONN_REAUTH_PEND,
431         HCI_CONN_ENCRYPT_PEND,
432         HCI_CONN_RSWITCH_PEND,
433         HCI_CONN_MODE_CHANGE_PEND,
434         HCI_CONN_SCO_SETUP_PEND,
435         HCI_CONN_LE_SMP_PEND,
436         HCI_CONN_MGMT_CONNECTED,
437         HCI_CONN_SSP_ENABLED,
438         HCI_CONN_POWER_SAVE,
439         HCI_CONN_REMOTE_OOB,
440 };
441
442 static inline bool hci_conn_ssp_enabled(struct hci_conn *conn)
443 {
444         struct hci_dev *hdev = conn->hdev;
445         return test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
446                test_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
447 }
448
449 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
450 {
451         struct hci_conn_hash *h = &hdev->conn_hash;
452         list_add_rcu(&c->list, &h->list);
453         switch (c->type) {
454         case ACL_LINK:
455                 h->acl_num++;
456                 break;
457         case AMP_LINK:
458                 h->amp_num++;
459                 break;
460         case LE_LINK:
461                 h->le_num++;
462                 break;
463         case SCO_LINK:
464         case ESCO_LINK:
465                 h->sco_num++;
466                 break;
467         }
468 }
469
470 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
471 {
472         struct hci_conn_hash *h = &hdev->conn_hash;
473
474         list_del_rcu(&c->list);
475         synchronize_rcu();
476
477         switch (c->type) {
478         case ACL_LINK:
479                 h->acl_num--;
480                 break;
481         case AMP_LINK:
482                 h->amp_num--;
483                 break;
484         case LE_LINK:
485                 h->le_num--;
486                 break;
487         case SCO_LINK:
488         case ESCO_LINK:
489                 h->sco_num--;
490                 break;
491         }
492 }
493
494 static inline unsigned int hci_conn_num(struct hci_dev *hdev, __u8 type)
495 {
496         struct hci_conn_hash *h = &hdev->conn_hash;
497         switch (type) {
498         case ACL_LINK:
499                 return h->acl_num;
500         case AMP_LINK:
501                 return h->amp_num;
502         case LE_LINK:
503                 return h->le_num;
504         case SCO_LINK:
505         case ESCO_LINK:
506                 return h->sco_num;
507         default:
508                 return 0;
509         }
510 }
511
512 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
513                                                                 __u16 handle)
514 {
515         struct hci_conn_hash *h = &hdev->conn_hash;
516         struct hci_conn  *c;
517
518         rcu_read_lock();
519
520         list_for_each_entry_rcu(c, &h->list, list) {
521                 if (c->handle == handle) {
522                         rcu_read_unlock();
523                         return c;
524                 }
525         }
526         rcu_read_unlock();
527
528         return NULL;
529 }
530
531 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
532                                                         __u8 type, bdaddr_t *ba)
533 {
534         struct hci_conn_hash *h = &hdev->conn_hash;
535         struct hci_conn  *c;
536
537         rcu_read_lock();
538
539         list_for_each_entry_rcu(c, &h->list, list) {
540                 if (c->type == type && !bacmp(&c->dst, ba)) {
541                         rcu_read_unlock();
542                         return c;
543                 }
544         }
545
546         rcu_read_unlock();
547
548         return NULL;
549 }
550
551 static inline struct hci_conn *hci_conn_hash_lookup_state(struct hci_dev *hdev,
552                                                         __u8 type, __u16 state)
553 {
554         struct hci_conn_hash *h = &hdev->conn_hash;
555         struct hci_conn  *c;
556
557         rcu_read_lock();
558
559         list_for_each_entry_rcu(c, &h->list, list) {
560                 if (c->type == type && c->state == state) {
561                         rcu_read_unlock();
562                         return c;
563                 }
564         }
565
566         rcu_read_unlock();
567
568         return NULL;
569 }
570
571 void hci_disconnect(struct hci_conn *conn, __u8 reason);
572 void hci_setup_sync(struct hci_conn *conn, __u16 handle);
573 void hci_sco_setup(struct hci_conn *conn, __u8 status);
574
575 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst);
576 int hci_conn_del(struct hci_conn *conn);
577 void hci_conn_hash_flush(struct hci_dev *hdev);
578 void hci_conn_check_pending(struct hci_dev *hdev);
579
580 struct hci_chan *hci_chan_create(struct hci_conn *conn);
581 void hci_chan_del(struct hci_chan *chan);
582 void hci_chan_list_flush(struct hci_conn *conn);
583 struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
584
585 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
586                              __u8 dst_type, __u8 sec_level, __u8 auth_type);
587 struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type,
588                                  bdaddr_t *dst);
589 int hci_conn_check_link_mode(struct hci_conn *conn);
590 int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level);
591 int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type);
592 int hci_conn_change_link_key(struct hci_conn *conn);
593 int hci_conn_switch_role(struct hci_conn *conn, __u8 role);
594
595 void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);
596
597 /*
598  * hci_conn_get() and hci_conn_put() are used to control the life-time of an
599  * "hci_conn" object. They do not guarantee that the hci_conn object is running,
600  * working or anything else. They just guarantee that the object is available
601  * and can be dereferenced. So you can use its locks, local variables and any
602  * other constant data.
603  * Before accessing runtime data, you _must_ lock the object and then check that
604  * it is still running. As soon as you release the locks, the connection might
605  * get dropped, though.
606  *
607  * On the other hand, hci_conn_hold() and hci_conn_drop() are used to control
608  * how long the underlying connection is held. So every channel that runs on the
609  * hci_conn object calls this to prevent the connection from disappearing. As
610  * long as you hold a device, you must also guarantee that you have a valid
611  * reference to the device via hci_conn_get() (or the initial reference from
612  * hci_conn_add()).
613  * The hold()/drop() ref-count is known to drop below 0 sometimes, which doesn't
614  * break because nobody cares for that. But this means, we cannot use
615  * _get()/_drop() in it, but require the caller to have a valid ref (FIXME).
616  */
617
618 static inline void hci_conn_get(struct hci_conn *conn)
619 {
620         get_device(&conn->dev);
621 }
622
623 static inline void hci_conn_put(struct hci_conn *conn)
624 {
625         put_device(&conn->dev);
626 }
627
628 static inline void hci_conn_hold(struct hci_conn *conn)
629 {
630         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
631
632         atomic_inc(&conn->refcnt);
633         cancel_delayed_work(&conn->disc_work);
634 }
635
636 static inline void hci_conn_drop(struct hci_conn *conn)
637 {
638         BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
639
640         if (atomic_dec_and_test(&conn->refcnt)) {
641                 unsigned long timeo;
642
643                 switch (conn->type) {
644                 case ACL_LINK:
645                 case LE_LINK:
646                         del_timer(&conn->idle_timer);
647                         if (conn->state == BT_CONNECTED) {
648                                 timeo = conn->disc_timeout;
649                                 if (!conn->out)
650                                         timeo *= 2;
651                         } else {
652                                 timeo = msecs_to_jiffies(10);
653                         }
654                         break;
655
656                 case AMP_LINK:
657                         timeo = conn->disc_timeout;
658                         break;
659
660                 default:
661                         timeo = msecs_to_jiffies(10);
662                         break;
663                 }
664
665                 cancel_delayed_work(&conn->disc_work);
666                 queue_delayed_work(conn->hdev->workqueue,
667                                    &conn->disc_work, timeo);
668         }
669 }
670
671 /* ----- HCI Devices ----- */
672 static inline void hci_dev_put(struct hci_dev *d)
673 {
674         BT_DBG("%s orig refcnt %d", d->name,
675                atomic_read(&d->dev.kobj.kref.refcount));
676
677         put_device(&d->dev);
678 }
679
680 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
681 {
682         BT_DBG("%s orig refcnt %d", d->name,
683                atomic_read(&d->dev.kobj.kref.refcount));
684
685         get_device(&d->dev);
686         return d;
687 }
688
689 #define hci_dev_lock(d)         mutex_lock(&d->lock)
690 #define hci_dev_unlock(d)       mutex_unlock(&d->lock)
691
692 #define to_hci_dev(d) container_of(d, struct hci_dev, dev)
693 #define to_hci_conn(c) container_of(c, struct hci_conn, dev)
694
695 static inline void *hci_get_drvdata(struct hci_dev *hdev)
696 {
697         return dev_get_drvdata(&hdev->dev);
698 }
699
700 static inline void hci_set_drvdata(struct hci_dev *hdev, void *data)
701 {
702         dev_set_drvdata(&hdev->dev, data);
703 }
704
705 /* hci_dev_list shall be locked */
706 static inline uint8_t __hci_num_ctrl(void)
707 {
708         uint8_t count = 0;
709         struct list_head *p;
710
711         list_for_each(p, &hci_dev_list) {
712                 count++;
713         }
714
715         return count;
716 }
717
718 struct hci_dev *hci_dev_get(int index);
719 struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src);
720
721 struct hci_dev *hci_alloc_dev(void);
722 void hci_free_dev(struct hci_dev *hdev);
723 int hci_register_dev(struct hci_dev *hdev);
724 void hci_unregister_dev(struct hci_dev *hdev);
725 int hci_suspend_dev(struct hci_dev *hdev);
726 int hci_resume_dev(struct hci_dev *hdev);
727 int hci_dev_open(__u16 dev);
728 int hci_dev_close(__u16 dev);
729 int hci_dev_reset(__u16 dev);
730 int hci_dev_reset_stat(__u16 dev);
731 int hci_dev_cmd(unsigned int cmd, void __user *arg);
732 int hci_get_dev_list(void __user *arg);
733 int hci_get_dev_info(void __user *arg);
734 int hci_get_conn_list(void __user *arg);
735 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
736 int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
737 int hci_inquiry(void __user *arg);
738
739 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
740                                          bdaddr_t *bdaddr);
741 int hci_blacklist_clear(struct hci_dev *hdev);
742 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
743 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
744
745 int hci_uuids_clear(struct hci_dev *hdev);
746
747 int hci_link_keys_clear(struct hci_dev *hdev);
748 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
749 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
750                      bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len);
751 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]);
752 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
753                 int new_key, u8 authenticated, u8 tk[16], u8 enc_size,
754                 __le16 ediv, u8 rand[8]);
755 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
756                                      u8 addr_type);
757 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr);
758 int hci_smp_ltks_clear(struct hci_dev *hdev);
759 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
760
761 int hci_remote_oob_data_clear(struct hci_dev *hdev);
762 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
763                                                         bdaddr_t *bdaddr);
764 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
765                                                                 u8 *randomizer);
766 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr);
767
768 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
769
770 int hci_recv_frame(struct sk_buff *skb);
771 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count);
772 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count);
773
774 void hci_init_sysfs(struct hci_dev *hdev);
775 int hci_add_sysfs(struct hci_dev *hdev);
776 void hci_del_sysfs(struct hci_dev *hdev);
777 void hci_conn_init_sysfs(struct hci_conn *conn);
778 void hci_conn_add_sysfs(struct hci_conn *conn);
779 void hci_conn_del_sysfs(struct hci_conn *conn);
780
781 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
782
783 /* ----- LMP capabilities ----- */
784 #define lmp_encrypt_capable(dev)   ((dev)->features[0][0] & LMP_ENCRYPT)
785 #define lmp_rswitch_capable(dev)   ((dev)->features[0][0] & LMP_RSWITCH)
786 #define lmp_hold_capable(dev)      ((dev)->features[0][0] & LMP_HOLD)
787 #define lmp_sniff_capable(dev)     ((dev)->features[0][0] & LMP_SNIFF)
788 #define lmp_park_capable(dev)      ((dev)->features[0][1] & LMP_PARK)
789 #define lmp_inq_rssi_capable(dev)  ((dev)->features[0][3] & LMP_RSSI_INQ)
790 #define lmp_esco_capable(dev)      ((dev)->features[0][3] & LMP_ESCO)
791 #define lmp_bredr_capable(dev)     (!((dev)->features[0][4] & LMP_NO_BREDR))
792 #define lmp_le_capable(dev)        ((dev)->features[0][4] & LMP_LE)
793 #define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
794 #define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
795 #define lmp_ext_inq_capable(dev)   ((dev)->features[0][6] & LMP_EXT_INQ)
796 #define lmp_le_br_capable(dev)     (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
797 #define lmp_ssp_capable(dev)       ((dev)->features[0][6] & LMP_SIMPLE_PAIR)
798 #define lmp_no_flush_capable(dev)  ((dev)->features[0][6] & LMP_NO_FLUSH)
799 #define lmp_lsto_capable(dev)      ((dev)->features[0][7] & LMP_LSTO)
800 #define lmp_inq_tx_pwr_capable(dev) ((dev)->features[0][7] & LMP_INQ_TX_PWR)
801 #define lmp_ext_feat_capable(dev)  ((dev)->features[0][7] & LMP_EXTFEATURES)
802
803 /* ----- Extended LMP capabilities ----- */
804 #define lmp_host_ssp_capable(dev)  ((dev)->features[1][0] & LMP_HOST_SSP)
805 #define lmp_host_le_capable(dev)   (!!((dev)->features[1][0] & LMP_HOST_LE))
806 #define lmp_host_le_br_capable(dev) (!!((dev)->features[1][0] & LMP_HOST_LE_BREDR))
807
808 /* returns true if at least one AMP active */
809 static inline bool hci_amp_capable(void)
810 {
811         struct hci_dev *hdev;
812         bool ret = false;
813
814         read_lock(&hci_dev_list_lock);
815         list_for_each_entry(hdev, &hci_dev_list, list)
816                 if (hdev->amp_type == HCI_AMP &&
817                     test_bit(HCI_UP, &hdev->flags))
818                         ret = true;
819         read_unlock(&hci_dev_list_lock);
820
821         return ret;
822 }
823
824 /* ----- HCI protocols ----- */
825 #define HCI_PROTO_DEFER             0x01
826
827 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr,
828                                         __u8 type, __u8 *flags)
829 {
830         switch (type) {
831         case ACL_LINK:
832                 return l2cap_connect_ind(hdev, bdaddr);
833
834         case SCO_LINK:
835         case ESCO_LINK:
836                 return sco_connect_ind(hdev, bdaddr, flags);
837
838         default:
839                 BT_ERR("unknown link type %d", type);
840                 return -EINVAL;
841         }
842 }
843
844 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
845 {
846         switch (conn->type) {
847         case ACL_LINK:
848         case LE_LINK:
849                 l2cap_connect_cfm(conn, status);
850                 break;
851
852         case SCO_LINK:
853         case ESCO_LINK:
854                 sco_connect_cfm(conn, status);
855                 break;
856
857         default:
858                 BT_ERR("unknown link type %d", conn->type);
859                 break;
860         }
861
862         if (conn->connect_cfm_cb)
863                 conn->connect_cfm_cb(conn, status);
864 }
865
866 static inline int hci_proto_disconn_ind(struct hci_conn *conn)
867 {
868         if (conn->type != ACL_LINK && conn->type != LE_LINK)
869                 return HCI_ERROR_REMOTE_USER_TERM;
870
871         return l2cap_disconn_ind(conn);
872 }
873
874 static inline void hci_proto_disconn_cfm(struct hci_conn *conn, __u8 reason)
875 {
876         switch (conn->type) {
877         case ACL_LINK:
878         case LE_LINK:
879                 l2cap_disconn_cfm(conn, reason);
880                 break;
881
882         case SCO_LINK:
883         case ESCO_LINK:
884                 sco_disconn_cfm(conn, reason);
885                 break;
886
887         /* L2CAP would be handled for BREDR chan */
888         case AMP_LINK:
889                 break;
890
891         default:
892                 BT_ERR("unknown link type %d", conn->type);
893                 break;
894         }
895
896         if (conn->disconn_cfm_cb)
897                 conn->disconn_cfm_cb(conn, reason);
898 }
899
900 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
901 {
902         __u8 encrypt;
903
904         if (conn->type != ACL_LINK && conn->type != LE_LINK)
905                 return;
906
907         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
908                 return;
909
910         encrypt = (conn->link_mode & HCI_LM_ENCRYPT) ? 0x01 : 0x00;
911         l2cap_security_cfm(conn, status, encrypt);
912
913         if (conn->security_cfm_cb)
914                 conn->security_cfm_cb(conn, status);
915 }
916
917 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status,
918                                                                 __u8 encrypt)
919 {
920         if (conn->type != ACL_LINK && conn->type != LE_LINK)
921                 return;
922
923         l2cap_security_cfm(conn, status, encrypt);
924
925         if (conn->security_cfm_cb)
926                 conn->security_cfm_cb(conn, status);
927 }
928
929 /* ----- HCI callbacks ----- */
930 struct hci_cb {
931         struct list_head list;
932
933         char *name;
934
935         void (*security_cfm)    (struct hci_conn *conn, __u8 status,
936                                                                 __u8 encrypt);
937         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
938         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
939 };
940
941 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
942 {
943         struct hci_cb *cb;
944         __u8 encrypt;
945
946         hci_proto_auth_cfm(conn, status);
947
948         if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags))
949                 return;
950
951         encrypt = (conn->link_mode & HCI_LM_ENCRYPT) ? 0x01 : 0x00;
952
953         read_lock(&hci_cb_list_lock);
954         list_for_each_entry(cb, &hci_cb_list, list) {
955                 if (cb->security_cfm)
956                         cb->security_cfm(conn, status, encrypt);
957         }
958         read_unlock(&hci_cb_list_lock);
959 }
960
961 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status,
962                                                                 __u8 encrypt)
963 {
964         struct hci_cb *cb;
965
966         if (conn->sec_level == BT_SECURITY_SDP)
967                 conn->sec_level = BT_SECURITY_LOW;
968
969         if (conn->pending_sec_level > conn->sec_level)
970                 conn->sec_level = conn->pending_sec_level;
971
972         hci_proto_encrypt_cfm(conn, status, encrypt);
973
974         read_lock(&hci_cb_list_lock);
975         list_for_each_entry(cb, &hci_cb_list, list) {
976                 if (cb->security_cfm)
977                         cb->security_cfm(conn, status, encrypt);
978         }
979         read_unlock(&hci_cb_list_lock);
980 }
981
982 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
983 {
984         struct hci_cb *cb;
985
986         read_lock(&hci_cb_list_lock);
987         list_for_each_entry(cb, &hci_cb_list, list) {
988                 if (cb->key_change_cfm)
989                         cb->key_change_cfm(conn, status);
990         }
991         read_unlock(&hci_cb_list_lock);
992 }
993
994 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status,
995                                                                 __u8 role)
996 {
997         struct hci_cb *cb;
998
999         read_lock(&hci_cb_list_lock);
1000         list_for_each_entry(cb, &hci_cb_list, list) {
1001                 if (cb->role_switch_cfm)
1002                         cb->role_switch_cfm(conn, status, role);
1003         }
1004         read_unlock(&hci_cb_list_lock);
1005 }
1006
1007 static inline bool eir_has_data_type(u8 *data, size_t data_len, u8 type)
1008 {
1009         size_t parsed = 0;
1010
1011         if (data_len < 2)
1012                 return false;
1013
1014         while (parsed < data_len - 1) {
1015                 u8 field_len = data[0];
1016
1017                 if (field_len == 0)
1018                         break;
1019
1020                 parsed += field_len + 1;
1021
1022                 if (parsed > data_len)
1023                         break;
1024
1025                 if (data[1] == type)
1026                         return true;
1027
1028                 data += field_len + 1;
1029         }
1030
1031         return false;
1032 }
1033
1034 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
1035 {
1036         size_t parsed = 0;
1037
1038         while (parsed < eir_len) {
1039                 u8 field_len = eir[0];
1040
1041                 if (field_len == 0)
1042                         return parsed;
1043
1044                 parsed += field_len + 1;
1045                 eir += field_len + 1;
1046         }
1047
1048         return eir_len;
1049 }
1050
1051 static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
1052                                   u8 data_len)
1053 {
1054         eir[eir_len++] = sizeof(type) + data_len;
1055         eir[eir_len++] = type;
1056         memcpy(&eir[eir_len], data, data_len);
1057         eir_len += data_len;
1058
1059         return eir_len;
1060 }
1061
1062 int hci_register_cb(struct hci_cb *hcb);
1063 int hci_unregister_cb(struct hci_cb *hcb);
1064
1065 struct hci_request {
1066         struct hci_dev          *hdev;
1067         struct sk_buff_head     cmd_q;
1068
1069         /* If something goes wrong when building the HCI request, the error
1070          * value is stored in this field.
1071          */
1072         int                     err;
1073 };
1074
1075 void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
1076 int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
1077 void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
1078                  const void *param);
1079 void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
1080                     const void *param, u8 event);
1081 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);
1082
1083 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
1084                                const void *param, u32 timeout);
1085 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
1086                                   const void *param, u8 event, u32 timeout);
1087
1088 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
1089                  const void *param);
1090 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags);
1091 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
1092
1093 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
1094
1095 /* ----- HCI Sockets ----- */
1096 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
1097 void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk);
1098 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
1099
1100 void hci_sock_dev_event(struct hci_dev *hdev, int event);
1101
1102 /* Management interface */
1103 #define DISCOV_TYPE_BREDR               (BIT(BDADDR_BREDR))
1104 #define DISCOV_TYPE_LE                  (BIT(BDADDR_LE_PUBLIC) | \
1105                                          BIT(BDADDR_LE_RANDOM))
1106 #define DISCOV_TYPE_INTERLEAVED         (BIT(BDADDR_BREDR) | \
1107                                          BIT(BDADDR_LE_PUBLIC) | \
1108                                          BIT(BDADDR_LE_RANDOM))
1109
1110 /* These LE scan and inquiry parameters were chosen according to LE General
1111  * Discovery Procedure specification.
1112  */
1113 #define DISCOV_LE_SCAN_WIN              0x12
1114 #define DISCOV_LE_SCAN_INT              0x12
1115 #define DISCOV_LE_TIMEOUT               msecs_to_jiffies(10240)
1116 #define DISCOV_INTERLEAVED_TIMEOUT      msecs_to_jiffies(5120)
1117 #define DISCOV_INTERLEAVED_INQUIRY_LEN  0x04
1118 #define DISCOV_BREDR_INQUIRY_LEN        0x08
1119
1120 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
1121 int mgmt_index_added(struct hci_dev *hdev);
1122 int mgmt_index_removed(struct hci_dev *hdev);
1123 int mgmt_set_powered_failed(struct hci_dev *hdev, int err);
1124 int mgmt_powered(struct hci_dev *hdev, u8 powered);
1125 int mgmt_discoverable(struct hci_dev *hdev, u8 discoverable);
1126 int mgmt_connectable(struct hci_dev *hdev, u8 connectable);
1127 int mgmt_write_scan_failed(struct hci_dev *hdev, u8 scan, u8 status);
1128 int mgmt_new_link_key(struct hci_dev *hdev, struct link_key *key,
1129                       bool persistent);
1130 int mgmt_device_connected(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1131                           u8 addr_type, u32 flags, u8 *name, u8 name_len,
1132                           u8 *dev_class);
1133 int mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
1134                              u8 link_type, u8 addr_type, u8 reason);
1135 int mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
1136                            u8 link_type, u8 addr_type, u8 status);
1137 int mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1138                         u8 addr_type, u8 status);
1139 int mgmt_pin_code_request(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 secure);
1140 int mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1141                                  u8 status);
1142 int mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1143                                      u8 status);
1144 int mgmt_user_confirm_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1145                               u8 link_type, u8 addr_type, __le32 value,
1146                               u8 confirm_hint);
1147 int mgmt_user_confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1148                                      u8 link_type, u8 addr_type, u8 status);
1149 int mgmt_user_confirm_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1150                                          u8 link_type, u8 addr_type, u8 status);
1151 int mgmt_user_passkey_request(struct hci_dev *hdev, bdaddr_t *bdaddr,
1152                               u8 link_type, u8 addr_type);
1153 int mgmt_user_passkey_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1154                                      u8 link_type, u8 addr_type, u8 status);
1155 int mgmt_user_passkey_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
1156                                          u8 link_type, u8 addr_type, u8 status);
1157 int mgmt_user_passkey_notify(struct hci_dev *hdev, bdaddr_t *bdaddr,
1158                              u8 link_type, u8 addr_type, u32 passkey,
1159                              u8 entered);
1160 int mgmt_auth_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1161                      u8 addr_type, u8 status);
1162 int mgmt_auth_enable_complete(struct hci_dev *hdev, u8 status);
1163 int mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1164 int mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
1165                                    u8 status);
1166 int mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
1167 int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
1168                                             u8 *randomizer, u8 status);
1169 int mgmt_le_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
1170 int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1171                       u8 addr_type, u8 *dev_class, s8 rssi, u8 cfm_name,
1172                       u8 ssp, u8 *eir, u16 eir_len);
1173 int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
1174                      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
1175 int mgmt_discovering(struct hci_dev *hdev, u8 discovering);
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
1216 u8 bdaddr_to_le(u8 bdaddr_type);
1217
1218 #define SCO_AIRMODE_MASK       0x0003
1219 #define SCO_AIRMODE_CVSD       0x0000
1220 #define SCO_AIRMODE_TRANSP     0x0003
1221
1222 #endif /* __HCI_CORE_H */