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[Bluetooth] Correct SCO buffer size on request
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / net / bluetooth / hci_core.h
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1da177e4
LT		 1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
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
1da177e4
LT		 28#include <net/bluetooth/hci.h>
29
30/* HCI upper protocols */
31#define HCI_PROTO_L2CAP 0
32#define HCI_PROTO_SCO 1
33
34#define HCI_INIT_TIMEOUT (HZ * 10)
35
1da177e4
LT		 36/* HCI Core structures */
37
38struct inquiry_data {
39 bdaddr_t bdaddr;
40 __u8 pscan_rep_mode;
41 __u8 pscan_period_mode;
42 __u8 pscan_mode;
43 __u8 dev_class[3];
1ebb9252 44 __le16 clock_offset;
1da177e4
LT		 45 __s8 rssi;
46};
47
48struct inquiry_entry {
49 struct inquiry_entry *next;
50 __u32 timestamp;
51 struct inquiry_data data;
52};
53
54struct inquiry_cache {
55 spinlock_t lock;
56 __u32 timestamp;
57 struct inquiry_entry *list;
58};
59
60struct hci_conn_hash {
61 struct list_head list;
62 spinlock_t lock;
63 unsigned int acl_num;
64 unsigned int sco_num;
65};
66
67struct hci_dev {
68 struct list_head list;
69 spinlock_t lock;
70 atomic_t refcnt;
71
72 char name[8];
73 unsigned long flags;
74 __u16 id;
75 __u8 type;
76 bdaddr_t bdaddr;
77 __u8 features[8];
78 __u16 voice_setting;
79
80 __u16 pkt_type;
81 __u16 link_policy;
82 __u16 link_mode;
83
84 unsigned long quirks;
85
86 atomic_t cmd_cnt;
87 unsigned int acl_cnt;
88 unsigned int sco_cnt;
89
90 unsigned int acl_mtu;
91 unsigned int sco_mtu;
92 unsigned int acl_pkts;
93 unsigned int sco_pkts;
94
95 unsigned long cmd_last_tx;
96 unsigned long acl_last_tx;
97 unsigned long sco_last_tx;
98
99 struct tasklet_struct cmd_task;
100 struct tasklet_struct rx_task;
101 struct tasklet_struct tx_task;
102
103 struct sk_buff_head rx_q;
104 struct sk_buff_head raw_q;
105 struct sk_buff_head cmd_q;
106
107 struct sk_buff *sent_cmd;
108
109 struct semaphore req_lock;
110 wait_queue_head_t req_wait_q;
111 __u32 req_status;
112 __u32 req_result;
113
114 struct inquiry_cache inq_cache;
115 struct hci_conn_hash conn_hash;
116
117 struct hci_dev_stats stat;
118
119 struct sk_buff_head driver_init;
120
121 void *driver_data;
122 void *core_data;
123
124 atomic_t promisc;
125
1da177e4
LT		 126 struct class_device class_dev;
127
128 struct module *owner;
129
130 int (*open)(struct hci_dev *hdev);
131 int (*close)(struct hci_dev *hdev);
132 int (*flush)(struct hci_dev *hdev);
133 int (*send)(struct sk_buff *skb);
134 void (*destruct)(struct hci_dev *hdev);
135 void (*notify)(struct hci_dev *hdev, unsigned int evt);
136 int (*ioctl)(struct hci_dev *hdev, unsigned int cmd, unsigned long arg);
137};
138
139struct hci_conn {
140 struct list_head list;
141
142 atomic_t refcnt;
143 spinlock_t lock;
144
145 bdaddr_t dst;
146 __u16 handle;
147 __u16 state;
148 __u8 type;
149 __u8 out;
150 __u8 dev_class[3];
151 __u32 link_mode;
152 unsigned long pend;
153
154 unsigned int sent;
155
156 struct sk_buff_head data_q;
157
158 struct timer_list timer;
159
160 struct hci_dev *hdev;
161 void *l2cap_data;
162 void *sco_data;
163 void *priv;
164
165 struct hci_conn *link;
166};
167
168extern struct hci_proto *hci_proto[];
169extern struct list_head hci_dev_list;
170extern struct list_head hci_cb_list;
171extern rwlock_t hci_dev_list_lock;
172extern rwlock_t hci_cb_list_lock;
173
174/* ----- Inquiry cache ----- */
175#define INQUIRY_CACHE_AGE_MAX (HZ*30) // 30 seconds
176#define INQUIRY_ENTRY_AGE_MAX (HZ*60) // 60 seconds
177
178#define inquiry_cache_lock(c) spin_lock(&c->lock)
179#define inquiry_cache_unlock(c) spin_unlock(&c->lock)
180#define inquiry_cache_lock_bh(c) spin_lock_bh(&c->lock)
181#define inquiry_cache_unlock_bh(c) spin_unlock_bh(&c->lock)
182
183static inline void inquiry_cache_init(struct hci_dev *hdev)
184{
185 struct inquiry_cache *c = &hdev->inq_cache;
186 spin_lock_init(&c->lock);
187 c->list = NULL;
188}
189
190static inline int inquiry_cache_empty(struct hci_dev *hdev)
191{
192 struct inquiry_cache *c = &hdev->inq_cache;
193 return (c->list == NULL);
194}
195
196static inline long inquiry_cache_age(struct hci_dev *hdev)
197{
198 struct inquiry_cache *c = &hdev->inq_cache;
199 return jiffies - c->timestamp;
200}
201
202static inline long inquiry_entry_age(struct inquiry_entry *e)
203{
204 return jiffies - e->timestamp;
205}
206
207struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr);
208void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data);
209
210/* ----- HCI Connections ----- */
211enum {
212 HCI_CONN_AUTH_PEND,
213 HCI_CONN_ENCRYPT_PEND,
214 HCI_CONN_RSWITCH_PEND
215};
216
217static inline void hci_conn_hash_init(struct hci_dev *hdev)
218{
219 struct hci_conn_hash *h = &hdev->conn_hash;
220 INIT_LIST_HEAD(&h->list);
221 spin_lock_init(&h->lock);
222 h->acl_num = 0;
223 h->sco_num = 0;
224}
225
226static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
227{
228 struct hci_conn_hash *h = &hdev->conn_hash;
229 list_add(&c->list, &h->list);
230 if (c->type == ACL_LINK)
231 h->acl_num++;
232 else
233 h->sco_num++;
234}
235
236static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
237{
238 struct hci_conn_hash *h = &hdev->conn_hash;
239 list_del(&c->list);
240 if (c->type == ACL_LINK)
241 h->acl_num--;
242 else
243 h->sco_num--;
244}
245
246static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
247 __u16 handle)
248{
249 struct hci_conn_hash *h = &hdev->conn_hash;
250 struct list_head *p;
251 struct hci_conn *c;
252
253 list_for_each(p, &h->list) {
254 c = list_entry(p, struct hci_conn, list);
255 if (c->handle == handle)
256 return c;
257 }
258 return NULL;
259}
260
261static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
262 __u8 type, bdaddr_t *ba)
263{
264 struct hci_conn_hash *h = &hdev->conn_hash;
265 struct list_head *p;
266 struct hci_conn *c;
267
268 list_for_each(p, &h->list) {
269 c = list_entry(p, struct hci_conn, list);
270 if (c->type == type && !bacmp(&c->dst, ba))
271 return c;
272 }
273 return NULL;
274}
275
276void hci_acl_disconn(struct hci_conn *conn, __u8 reason);
277void hci_add_sco(struct hci_conn *conn, __u16 handle);
278
279struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst);
280int hci_conn_del(struct hci_conn *conn);
281void hci_conn_hash_flush(struct hci_dev *hdev);
282
283struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *src);
284int hci_conn_auth(struct hci_conn *conn);
285int hci_conn_encrypt(struct hci_conn *conn);
286int hci_conn_change_link_key(struct hci_conn *conn);
287int hci_conn_switch_role(struct hci_conn *conn, uint8_t role);
288
289static inline void hci_conn_set_timer(struct hci_conn *conn, unsigned long timeout)
290{
291 mod_timer(&conn->timer, jiffies + timeout);
292}
293
294static inline void hci_conn_del_timer(struct hci_conn *conn)
295{
296 del_timer(&conn->timer);
297}
298
299static inline void hci_conn_hold(struct hci_conn *conn)
300{
301 atomic_inc(&conn->refcnt);
302 hci_conn_del_timer(conn);
303}
304
305static inline void hci_conn_put(struct hci_conn *conn)
306{
307 if (atomic_dec_and_test(&conn->refcnt)) {
308 if (conn->type == ACL_LINK) {
309 unsigned long timeo = (conn->out) ?
310 HCI_DISCONN_TIMEOUT : HCI_DISCONN_TIMEOUT * 2;
311 hci_conn_set_timer(conn, timeo);
312 } else
313 hci_conn_set_timer(conn, HZ / 100);
314 }
315}
316
317/* ----- HCI tasks ----- */
318static inline void hci_sched_cmd(struct hci_dev *hdev)
319{
320 tasklet_schedule(&hdev->cmd_task);
321}
322
323static inline void hci_sched_rx(struct hci_dev *hdev)
324{
325 tasklet_schedule(&hdev->rx_task);
326}
327
328static inline void hci_sched_tx(struct hci_dev *hdev)
329{
330 tasklet_schedule(&hdev->tx_task);
331}
332
333/* ----- HCI Devices ----- */
334static inline void __hci_dev_put(struct hci_dev *d)
335{
336 if (atomic_dec_and_test(&d->refcnt))
337 d->destruct(d);
338}
339
340static inline void hci_dev_put(struct hci_dev *d)
341{
342 __hci_dev_put(d);
343 module_put(d->owner);
344}
345
346static inline struct hci_dev *__hci_dev_hold(struct hci_dev *d)
347{
348 atomic_inc(&d->refcnt);
349 return d;
350}
351
352static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
353{
354 if (try_module_get(d->owner))
355 return __hci_dev_hold(d);
356 return NULL;
357}
358
359#define hci_dev_lock(d) spin_lock(&d->lock)
360#define hci_dev_unlock(d) spin_unlock(&d->lock)
361#define hci_dev_lock_bh(d) spin_lock_bh(&d->lock)
362#define hci_dev_unlock_bh(d) spin_unlock_bh(&d->lock)
363
364struct hci_dev *hci_dev_get(int index);
365struct hci_dev *hci_get_route(bdaddr_t *src, bdaddr_t *dst);
366
367struct hci_dev *hci_alloc_dev(void);
368void hci_free_dev(struct hci_dev *hdev);
369int hci_register_dev(struct hci_dev *hdev);
370int hci_unregister_dev(struct hci_dev *hdev);
371int hci_suspend_dev(struct hci_dev *hdev);
372int hci_resume_dev(struct hci_dev *hdev);
373int hci_dev_open(__u16 dev);
374int hci_dev_close(__u16 dev);
375int hci_dev_reset(__u16 dev);
376int hci_dev_reset_stat(__u16 dev);
377int hci_dev_cmd(unsigned int cmd, void __user *arg);
378int hci_get_dev_list(void __user *arg);
379int hci_get_dev_info(void __user *arg);
380int hci_get_conn_list(void __user *arg);
381int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
382int hci_inquiry(void __user *arg);
383
384void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
385
386/* Receive frame from HCI drivers */
387static inline int hci_recv_frame(struct sk_buff *skb)
388{
389 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
390 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
391 && !test_bit(HCI_INIT, &hdev->flags))) {
392 kfree_skb(skb);
393 return -ENXIO;
394 }
395
396 /* Incomming skb */
397 bt_cb(skb)->incoming = 1;
398
399 /* Time stamp */
a61bbcf2 400 __net_timestamp(skb);
1da177e4
LT		 401
402 /* Queue frame for rx task */
403 skb_queue_tail(&hdev->rx_q, skb);
404 hci_sched_rx(hdev);
405 return 0;
406}
407
408int hci_register_sysfs(struct hci_dev *hdev);
409void hci_unregister_sysfs(struct hci_dev *hdev);
410
411#define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->class_dev.dev = (pdev))
412
413/* ----- LMP capabilities ----- */
414#define lmp_rswitch_capable(dev) (dev->features[0] & LMP_RSWITCH)
415#define lmp_encrypt_capable(dev) (dev->features[0] & LMP_ENCRYPT)
416
417/* ----- HCI protocols ----- */
418struct hci_proto {
419 char *name;
420 unsigned int id;
421 unsigned long flags;
422
423 void *priv;
424
425 int (*connect_ind) (struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type);
426 int (*connect_cfm) (struct hci_conn *conn, __u8 status);
427 int (*disconn_ind) (struct hci_conn *conn, __u8 reason);
428 int (*recv_acldata) (struct hci_conn *conn, struct sk_buff *skb, __u16 flags);
429 int (*recv_scodata) (struct hci_conn *conn, struct sk_buff *skb);
430 int (*auth_cfm) (struct hci_conn *conn, __u8 status);
431 int (*encrypt_cfm) (struct hci_conn *conn, __u8 status);
432};
433
434static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
435{
436 register struct hci_proto *hp;
437 int mask = 0;
438
439 hp = hci_proto[HCI_PROTO_L2CAP];
440 if (hp && hp->connect_ind)
441 mask |= hp->connect_ind(hdev, bdaddr, type);
442
443 hp = hci_proto[HCI_PROTO_SCO];
444 if (hp && hp->connect_ind)
445 mask |= hp->connect_ind(hdev, bdaddr, type);
446
447 return mask;
448}
449
450static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
451{
452 register struct hci_proto *hp;
453
454 hp = hci_proto[HCI_PROTO_L2CAP];
455 if (hp && hp->connect_cfm)
456 hp->connect_cfm(conn, status);
457
458 hp = hci_proto[HCI_PROTO_SCO];
459 if (hp && hp->connect_cfm)
460 hp->connect_cfm(conn, status);
461}
462
463static inline void hci_proto_disconn_ind(struct hci_conn *conn, __u8 reason)
464{
465 register struct hci_proto *hp;
466
467 hp = hci_proto[HCI_PROTO_L2CAP];
468 if (hp && hp->disconn_ind)
469 hp->disconn_ind(conn, reason);
470
471 hp = hci_proto[HCI_PROTO_SCO];
472 if (hp && hp->disconn_ind)
473 hp->disconn_ind(conn, reason);
474}
475
476static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
477{
478 register struct hci_proto *hp;
479
480 hp = hci_proto[HCI_PROTO_L2CAP];
481 if (hp && hp->auth_cfm)
482 hp->auth_cfm(conn, status);
483
484 hp = hci_proto[HCI_PROTO_SCO];
485 if (hp && hp->auth_cfm)
486 hp->auth_cfm(conn, status);
487}
488
489static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status)
490{
491 register struct hci_proto *hp;
492
493 hp = hci_proto[HCI_PROTO_L2CAP];
494 if (hp && hp->encrypt_cfm)
495 hp->encrypt_cfm(conn, status);
496
497 hp = hci_proto[HCI_PROTO_SCO];
498 if (hp && hp->encrypt_cfm)
499 hp->encrypt_cfm(conn, status);
500}
501
502int hci_register_proto(struct hci_proto *hproto);
503int hci_unregister_proto(struct hci_proto *hproto);
504
505/* ----- HCI callbacks ----- */
506struct hci_cb {
507 struct list_head list;
508
509 char *name;
510
511 void (*auth_cfm) (struct hci_conn *conn, __u8 status);
512 void (*encrypt_cfm) (struct hci_conn *conn, __u8 status, __u8 encrypt);
513 void (*key_change_cfm) (struct hci_conn *conn, __u8 status);
514 void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
515};
516
517static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
518{
519 struct list_head *p;
520
521 hci_proto_auth_cfm(conn, status);
522
523 read_lock_bh(&hci_cb_list_lock);
524 list_for_each(p, &hci_cb_list) {
525 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
526 if (cb->auth_cfm)
527 cb->auth_cfm(conn, status);
528 }
529 read_unlock_bh(&hci_cb_list_lock);
530}
531
532static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status, __u8 encrypt)
533{
534 struct list_head *p;
535
536 hci_proto_encrypt_cfm(conn, status);
537
538 read_lock_bh(&hci_cb_list_lock);
539 list_for_each(p, &hci_cb_list) {
540 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
541 if (cb->encrypt_cfm)
542 cb->encrypt_cfm(conn, status, encrypt);
543 }
544 read_unlock_bh(&hci_cb_list_lock);
545}
546
547static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
548{
549 struct list_head *p;
550
551 read_lock_bh(&hci_cb_list_lock);
552 list_for_each(p, &hci_cb_list) {
553 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
554 if (cb->key_change_cfm)
555 cb->key_change_cfm(conn, status);
556 }
557 read_unlock_bh(&hci_cb_list_lock);
558}
559
560static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status, __u8 role)
561{
562 struct list_head *p;
563
564 read_lock_bh(&hci_cb_list_lock);
565 list_for_each(p, &hci_cb_list) {
566 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
567 if (cb->role_switch_cfm)
568 cb->role_switch_cfm(conn, status, role);
569 }
570 read_unlock_bh(&hci_cb_list_lock);
571}
572
573int hci_register_cb(struct hci_cb *hcb);
574int hci_unregister_cb(struct hci_cb *hcb);
575
576int hci_register_notifier(struct notifier_block *nb);
577int hci_unregister_notifier(struct notifier_block *nb);
578
579int hci_send_cmd(struct hci_dev *hdev, __u16 ogf, __u16 ocf, __u32 plen, void *param);
580int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags);
581int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
582
583void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 ogf, __u16 ocf);
584
585void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data);
586
587/* ----- HCI Sockets ----- */
588void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
589
590/* HCI info for socket */
591#define hci_pi(sk) ((struct hci_pinfo *) sk)
592
593struct hci_pinfo {
594 struct bt_sock bt;
595 struct hci_dev *hdev;
596 struct hci_filter filter;
597 __u32 cmsg_mask;
598};
599
600/* HCI security filter */
601#define HCI_SFLT_MAX_OGF 5
602
603struct hci_sec_filter {
604 __u32 type_mask;
605 __u32 event_mask[2];
606 __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
607};
608
609/* ----- HCI requests ----- */
610#define HCI_REQ_DONE 0
611#define HCI_REQ_PEND 1
612#define HCI_REQ_CANCELED 2
613
614#define hci_req_lock(d) down(&d->req_lock)
615#define hci_req_unlock(d) up(&d->req_lock)
616
617void hci_req_complete(struct hci_dev *hdev, int result);
618
619#endif /* __HCI_CORE_H */
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