include/net/bluetooth/hci_core.h

   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
  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 /* HCI Core structures */
  35 struct inquiry_data {
  36         bdaddr_t        bdaddr;
  37         __u8            pscan_rep_mode;
  38         __u8            pscan_period_mode;
  39         __u8            pscan_mode;
  40         __u8            dev_class[3];
  41         __le16          clock_offset;
  42         __s8            rssi;
  43 };
  44
  45 struct inquiry_entry {
  46         struct inquiry_entry    *next;
  47         __u32                   timestamp;
  48         struct inquiry_data     data;
  49 };
  50
  51 struct inquiry_cache {
  52         spinlock_t              lock;
  53         __u32                   timestamp;
  54         struct inquiry_entry    *list;
  55 };
  56
  57 struct hci_conn_hash {
  58         struct list_head list;
  59         spinlock_t       lock;
  60         unsigned int     acl_num;
  61         unsigned int     sco_num;
  62 };
  63
  64 struct hci_dev {
  65         struct list_head list;
  66         spinlock_t      lock;
  67         atomic_t        refcnt;
  68
  69         char            name[8];
  70         unsigned long   flags;
  71         __u16           id;
  72         __u8            type;
  73         bdaddr_t        bdaddr;
  74         __u8            features[8];
  75         __u16           voice_setting;
  76
  77         __u16           pkt_type;
  78         __u16           link_policy;
  79         __u16           link_mode;
  80
  81         __u32           idle_timeout;
  82         __u16           sniff_min_interval;
  83         __u16           sniff_max_interval;
  84
  85         unsigned long   quirks;
  86
  87         atomic_t        cmd_cnt;
  88         unsigned int    acl_cnt;
  89         unsigned int    sco_cnt;
  90
  91         unsigned int    acl_mtu;
  92         unsigned int    sco_mtu;
  93         unsigned int    acl_pkts;
  94         unsigned int    sco_pkts;
  95
  96         unsigned long   cmd_last_tx;
  97         unsigned long   acl_last_tx;
  98         unsigned long   sco_last_tx;
  99
 100         struct tasklet_struct   cmd_task;
 101         struct tasklet_struct   rx_task;
 102         struct tasklet_struct   tx_task;
 103
 104         struct sk_buff_head     rx_q;
 105         struct sk_buff_head     raw_q;
 106         struct sk_buff_head     cmd_q;
 107
 108         struct sk_buff          *sent_cmd;
 109
 110         struct semaphore        req_lock;
 111         wait_queue_head_t       req_wait_q;
 112         __u32                   req_status;
 113         __u32                   req_result;
 114
 115         struct inquiry_cache    inq_cache;
 116         struct hci_conn_hash    conn_hash;
 117
 118         struct hci_dev_stats    stat;
 119
 120         struct sk_buff_head     driver_init;
 121
 122         void                    *driver_data;
 123         void                    *core_data;
 124
 125         atomic_t                promisc;
 126
 127         struct device           *parent;
 128         struct device           dev;
 129
 130         struct module           *owner;
 131
 132         int (*open)(struct hci_dev *hdev);
 133         int (*close)(struct hci_dev *hdev);
 134         int (*flush)(struct hci_dev *hdev);
 135         int (*send)(struct sk_buff *skb);
 136         void (*destruct)(struct hci_dev *hdev);
 137         void (*notify)(struct hci_dev *hdev, unsigned int evt);
 138         int (*ioctl)(struct hci_dev *hdev, unsigned int cmd, unsigned long arg);
 139 };
 140
 141 struct hci_conn {
 142         struct list_head list;
 143
 144         atomic_t         refcnt;
 145         spinlock_t       lock;
 146
 147         bdaddr_t         dst;
 148         __u16            handle;
 149         __u16            state;
 150         __u8             mode;
 151         __u8             type;
 152         __u8             out;
 153         __u8             dev_class[3];
 154         __u8             features[8];
 155         __u16            interval;
 156         __u16            link_policy;
 157         __u32            link_mode;
 158         __u8             power_save;
 159         unsigned long    pend;
 160
 161         unsigned int     sent;
 162
 163         struct sk_buff_head data_q;
 164
 165         struct timer_list disc_timer;
 166         struct timer_list idle_timer;
 167
 168         struct hci_dev  *hdev;
 169         void            *l2cap_data;
 170         void            *sco_data;
 171         void            *priv;
 172
 173         struct hci_conn *link;
 174 };
 175
 176 extern struct hci_proto *hci_proto[];
 177 extern struct list_head hci_dev_list;
 178 extern struct list_head hci_cb_list;
 179 extern rwlock_t hci_dev_list_lock;
 180 extern rwlock_t hci_cb_list_lock;
 181
 182 /* ----- Inquiry cache ----- */
 183 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   // 30 seconds
 184 #define INQUIRY_ENTRY_AGE_MAX   (HZ*60)   // 60 seconds
 185
 186 #define inquiry_cache_lock(c)           spin_lock(&c->lock)
 187 #define inquiry_cache_unlock(c)         spin_unlock(&c->lock)
 188 #define inquiry_cache_lock_bh(c)        spin_lock_bh(&c->lock)
 189 #define inquiry_cache_unlock_bh(c)      spin_unlock_bh(&c->lock)
 190
 191 static inline void inquiry_cache_init(struct hci_dev *hdev)
 192 {
 193         struct inquiry_cache *c = &hdev->inq_cache;
 194         spin_lock_init(&c->lock);
 195         c->list = NULL;
 196 }
 197
 198 static inline int inquiry_cache_empty(struct hci_dev *hdev)
 199 {
 200         struct inquiry_cache *c = &hdev->inq_cache;
 201         return (c->list == NULL);
 202 }
 203
 204 static inline long inquiry_cache_age(struct hci_dev *hdev)
 205 {
 206         struct inquiry_cache *c = &hdev->inq_cache;
 207         return jiffies - c->timestamp;
 208 }
 209
 210 static inline long inquiry_entry_age(struct inquiry_entry *e)
 211 {
 212         return jiffies - e->timestamp;
 213 }
 214
 215 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr);
 216 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data);
 217
 218 /* ----- HCI Connections ----- */
 219 enum {
 220         HCI_CONN_AUTH_PEND,
 221         HCI_CONN_ENCRYPT_PEND,
 222         HCI_CONN_RSWITCH_PEND,
 223         HCI_CONN_MODE_CHANGE_PEND,
 224 };
 225
 226 static inline void hci_conn_hash_init(struct hci_dev *hdev)
 227 {
 228         struct hci_conn_hash *h = &hdev->conn_hash;
 229         INIT_LIST_HEAD(&h->list);
 230         spin_lock_init(&h->lock);
 231         h->acl_num = 0;
 232         h->sco_num = 0;
 233 }
 234
 235 static inline void hci_conn_hash_add(struct hci_dev *hdev, struct hci_conn *c)
 236 {
 237         struct hci_conn_hash *h = &hdev->conn_hash;
 238         list_add(&c->list, &h->list);
 239         if (c->type == ACL_LINK)
 240                 h->acl_num++;
 241         else
 242                 h->sco_num++;
 243 }
 244
 245 static inline void hci_conn_hash_del(struct hci_dev *hdev, struct hci_conn *c)
 246 {
 247         struct hci_conn_hash *h = &hdev->conn_hash;
 248         list_del(&c->list);
 249         if (c->type == ACL_LINK)
 250                 h->acl_num--;
 251         else
 252                 h->sco_num--;
 253 }
 254
 255 static inline struct hci_conn *hci_conn_hash_lookup_handle(struct hci_dev *hdev,
 256                                         __u16 handle)
 257 {
 258         struct hci_conn_hash *h = &hdev->conn_hash;
 259         struct list_head *p;
 260         struct hci_conn  *c;
 261
 262         list_for_each(p, &h->list) {
 263                 c = list_entry(p, struct hci_conn, list);
 264                 if (c->handle == handle)
 265                         return c;
 266         }
 267         return NULL;
 268 }
 269
 270 static inline struct hci_conn *hci_conn_hash_lookup_ba(struct hci_dev *hdev,
 271                                         __u8 type, bdaddr_t *ba)
 272 {
 273         struct hci_conn_hash *h = &hdev->conn_hash;
 274         struct list_head *p;
 275         struct hci_conn  *c;
 276
 277         list_for_each(p, &h->list) {
 278                 c = list_entry(p, struct hci_conn, list);
 279                 if (c->type == type && !bacmp(&c->dst, ba))
 280                         return c;
 281         }
 282         return NULL;
 283 }
 284
 285 void hci_acl_disconn(struct hci_conn *conn, __u8 reason);
 286 void hci_add_sco(struct hci_conn *conn, __u16 handle);
 287
 288 struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst);
 289 int    hci_conn_del(struct hci_conn *conn);
 290 void   hci_conn_hash_flush(struct hci_dev *hdev);
 291
 292 struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *src);
 293 int hci_conn_auth(struct hci_conn *conn);
 294 int hci_conn_encrypt(struct hci_conn *conn);
 295 int hci_conn_change_link_key(struct hci_conn *conn);
 296 int hci_conn_switch_role(struct hci_conn *conn, uint8_t role);
 297
 298 void hci_conn_enter_active_mode(struct hci_conn *conn);
 299 void hci_conn_enter_sniff_mode(struct hci_conn *conn);
 300
 301 static inline void hci_conn_hold(struct hci_conn *conn)
 302 {
 303         atomic_inc(&conn->refcnt);
 304         del_timer(&conn->disc_timer);
 305 }
 306
 307 static inline void hci_conn_put(struct hci_conn *conn)
 308 {
 309         if (atomic_dec_and_test(&conn->refcnt)) {
 310                 unsigned long timeo;
 311                 if (conn->type == ACL_LINK) {
 312                         timeo = msecs_to_jiffies(HCI_DISCONN_TIMEOUT);
 313                         if (!conn->out)
 314                                 timeo *= 2;
 315                         del_timer(&conn->idle_timer);
 316                 } else
 317                         timeo = msecs_to_jiffies(10);
 318                 mod_timer(&conn->disc_timer, jiffies + timeo);
 319         }
 320 }
 321
 322 /* ----- HCI tasks ----- */
 323 static inline void hci_sched_cmd(struct hci_dev *hdev)
 324 {
 325         tasklet_schedule(&hdev->cmd_task);
 326 }
 327
 328 static inline void hci_sched_rx(struct hci_dev *hdev)
 329 {
 330         tasklet_schedule(&hdev->rx_task);
 331 }
 332
 333 static inline void hci_sched_tx(struct hci_dev *hdev)
 334 {
 335         tasklet_schedule(&hdev->tx_task);
 336 }
 337
 338 /* ----- HCI Devices ----- */
 339 static inline void __hci_dev_put(struct hci_dev *d)
 340 {
 341         if (atomic_dec_and_test(&d->refcnt))
 342                 d->destruct(d);
 343 }
 344
 345 static inline void hci_dev_put(struct hci_dev *d)
 346 {
 347         __hci_dev_put(d);
 348         module_put(d->owner);
 349 }
 350
 351 static inline struct hci_dev *__hci_dev_hold(struct hci_dev *d)
 352 {
 353         atomic_inc(&d->refcnt);
 354         return d;
 355 }
 356
 357 static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 358 {
 359         if (try_module_get(d->owner))
 360                 return __hci_dev_hold(d);
 361         return NULL;
 362 }
 363
 364 #define hci_dev_lock(d)         spin_lock(&d->lock)
 365 #define hci_dev_unlock(d)       spin_unlock(&d->lock)
 366 #define hci_dev_lock_bh(d)      spin_lock_bh(&d->lock)
 367 #define hci_dev_unlock_bh(d)    spin_unlock_bh(&d->lock)
 368
 369 struct hci_dev *hci_dev_get(int index);
 370 struct hci_dev *hci_get_route(bdaddr_t *src, bdaddr_t *dst);
 371
 372 struct hci_dev *hci_alloc_dev(void);
 373 void hci_free_dev(struct hci_dev *hdev);
 374 int hci_register_dev(struct hci_dev *hdev);
 375 int hci_unregister_dev(struct hci_dev *hdev);
 376 int hci_suspend_dev(struct hci_dev *hdev);
 377 int hci_resume_dev(struct hci_dev *hdev);
 378 int hci_dev_open(__u16 dev);
 379 int hci_dev_close(__u16 dev);
 380 int hci_dev_reset(__u16 dev);
 381 int hci_dev_reset_stat(__u16 dev);
 382 int hci_dev_cmd(unsigned int cmd, void __user *arg);
 383 int hci_get_dev_list(void __user *arg);
 384 int hci_get_dev_info(void __user *arg);
 385 int hci_get_conn_list(void __user *arg);
 386 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
 387 int hci_inquiry(void __user *arg);
 388
 389 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 390
 391 /* Receive frame from HCI drivers */
 392 static inline int hci_recv_frame(struct sk_buff *skb)
 393 {
 394         struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 395         if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
 396                         && !test_bit(HCI_INIT, &hdev->flags))) {
 397                 kfree_skb(skb);
 398                 return -ENXIO;
 399         }
 400
 401         /* Incomming skb */
 402         bt_cb(skb)->incoming = 1;
 403
 404         /* Time stamp */
 405         __net_timestamp(skb);
 406
 407         /* Queue frame for rx task */
 408         skb_queue_tail(&hdev->rx_q, skb);
 409         hci_sched_rx(hdev);
 410         return 0;
 411 }
 412
 413 int hci_register_sysfs(struct hci_dev *hdev);
 414 void hci_unregister_sysfs(struct hci_dev *hdev);
 415
 416 #define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->parent = (pdev))
 417
 418 /* ----- LMP capabilities ----- */
 419 #define lmp_rswitch_capable(dev)   ((dev)->features[0] & LMP_RSWITCH)
 420 #define lmp_encrypt_capable(dev)   ((dev)->features[0] & LMP_ENCRYPT)
 421 #define lmp_sniff_capable(dev)     ((dev)->features[0] & LMP_SNIFF)
 422 #define lmp_sniffsubr_capable(dev) ((dev)->features[5] & LMP_SNIFF_SUBR)
 423
 424 /* ----- HCI protocols ----- */
 425 struct hci_proto {
 426         char            *name;
 427         unsigned int    id;
 428         unsigned long   flags;
 429
 430         void            *priv;
 431
 432         int (*connect_ind)      (struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type);
 433         int (*connect_cfm)      (struct hci_conn *conn, __u8 status);
 434         int (*disconn_ind)      (struct hci_conn *conn, __u8 reason);
 435         int (*recv_acldata)     (struct hci_conn *conn, struct sk_buff *skb, __u16 flags);
 436         int (*recv_scodata)     (struct hci_conn *conn, struct sk_buff *skb);
 437         int (*auth_cfm)         (struct hci_conn *conn, __u8 status);
 438         int (*encrypt_cfm)      (struct hci_conn *conn, __u8 status);
 439 };
 440
 441 static inline int hci_proto_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 type)
 442 {
 443         register struct hci_proto *hp;
 444         int mask = 0;
 445
 446         hp = hci_proto[HCI_PROTO_L2CAP];
 447         if (hp && hp->connect_ind)
 448                 mask |= hp->connect_ind(hdev, bdaddr, type);
 449
 450         hp = hci_proto[HCI_PROTO_SCO];
 451         if (hp && hp->connect_ind)
 452                 mask |= hp->connect_ind(hdev, bdaddr, type);
 453
 454         return mask;
 455 }
 456
 457 static inline void hci_proto_connect_cfm(struct hci_conn *conn, __u8 status)
 458 {
 459         register struct hci_proto *hp;
 460
 461         hp = hci_proto[HCI_PROTO_L2CAP];
 462         if (hp && hp->connect_cfm)
 463                 hp->connect_cfm(conn, status);
 464
 465         hp = hci_proto[HCI_PROTO_SCO];
 466         if (hp && hp->connect_cfm)
 467                 hp->connect_cfm(conn, status);
 468 }
 469
 470 static inline void hci_proto_disconn_ind(struct hci_conn *conn, __u8 reason)
 471 {
 472         register struct hci_proto *hp;
 473
 474         hp = hci_proto[HCI_PROTO_L2CAP];
 475         if (hp && hp->disconn_ind)
 476                 hp->disconn_ind(conn, reason);
 477
 478         hp = hci_proto[HCI_PROTO_SCO];
 479         if (hp && hp->disconn_ind)
 480                 hp->disconn_ind(conn, reason);
 481 }
 482
 483 static inline void hci_proto_auth_cfm(struct hci_conn *conn, __u8 status)
 484 {
 485         register struct hci_proto *hp;
 486
 487         hp = hci_proto[HCI_PROTO_L2CAP];
 488         if (hp && hp->auth_cfm)
 489                 hp->auth_cfm(conn, status);
 490
 491         hp = hci_proto[HCI_PROTO_SCO];
 492         if (hp && hp->auth_cfm)
 493                 hp->auth_cfm(conn, status);
 494 }
 495
 496 static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status)
 497 {
 498         register struct hci_proto *hp;
 499
 500         hp = hci_proto[HCI_PROTO_L2CAP];
 501         if (hp && hp->encrypt_cfm)
 502                 hp->encrypt_cfm(conn, status);
 503
 504         hp = hci_proto[HCI_PROTO_SCO];
 505         if (hp && hp->encrypt_cfm)
 506                 hp->encrypt_cfm(conn, status);
 507 }
 508
 509 int hci_register_proto(struct hci_proto *hproto);
 510 int hci_unregister_proto(struct hci_proto *hproto);
 511
 512 /* ----- HCI callbacks ----- */
 513 struct hci_cb {
 514         struct list_head list;
 515
 516         char *name;
 517
 518         void (*auth_cfm)        (struct hci_conn *conn, __u8 status);
 519         void (*encrypt_cfm)     (struct hci_conn *conn, __u8 status, __u8 encrypt);
 520         void (*key_change_cfm)  (struct hci_conn *conn, __u8 status);
 521         void (*role_switch_cfm) (struct hci_conn *conn, __u8 status, __u8 role);
 522 };
 523
 524 static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
 525 {
 526         struct list_head *p;
 527
 528         hci_proto_auth_cfm(conn, status);
 529
 530         read_lock_bh(&hci_cb_list_lock);
 531         list_for_each(p, &hci_cb_list) {
 532                 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
 533                 if (cb->auth_cfm)
 534                         cb->auth_cfm(conn, status);
 535         }
 536         read_unlock_bh(&hci_cb_list_lock);
 537 }
 538
 539 static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status, __u8 encrypt)
 540 {
 541         struct list_head *p;
 542
 543         hci_proto_encrypt_cfm(conn, status);
 544
 545         read_lock_bh(&hci_cb_list_lock);
 546         list_for_each(p, &hci_cb_list) {
 547                 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
 548                 if (cb->encrypt_cfm)
 549                         cb->encrypt_cfm(conn, status, encrypt);
 550         }
 551         read_unlock_bh(&hci_cb_list_lock);
 552 }
 553
 554 static inline void hci_key_change_cfm(struct hci_conn *conn, __u8 status)
 555 {
 556         struct list_head *p;
 557
 558         read_lock_bh(&hci_cb_list_lock);
 559         list_for_each(p, &hci_cb_list) {
 560                 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
 561                 if (cb->key_change_cfm)
 562                         cb->key_change_cfm(conn, status);
 563         }
 564         read_unlock_bh(&hci_cb_list_lock);
 565 }
 566
 567 static inline void hci_role_switch_cfm(struct hci_conn *conn, __u8 status, __u8 role)
 568 {
 569         struct list_head *p;
 570
 571         read_lock_bh(&hci_cb_list_lock);
 572         list_for_each(p, &hci_cb_list) {
 573                 struct hci_cb *cb = list_entry(p, struct hci_cb, list);
 574                 if (cb->role_switch_cfm)
 575                         cb->role_switch_cfm(conn, status, role);
 576         }
 577         read_unlock_bh(&hci_cb_list_lock);
 578 }
 579
 580 int hci_register_cb(struct hci_cb *hcb);
 581 int hci_unregister_cb(struct hci_cb *hcb);
 582
 583 int hci_register_notifier(struct notifier_block *nb);
 584 int hci_unregister_notifier(struct notifier_block *nb);
 585
 586 int hci_send_cmd(struct hci_dev *hdev, __u16 ogf, __u16 ocf, __u32 plen, void *param);
 587 int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags);
 588 int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb);
 589
 590 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 ogf, __u16 ocf);
 591
 592 void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data);
 593
 594 /* ----- HCI Sockets ----- */
 595 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
 596
 597 /* HCI info for socket */
 598 #define hci_pi(sk) ((struct hci_pinfo *) sk)
 599
 600 struct hci_pinfo {
 601         struct bt_sock    bt;
 602         struct hci_dev    *hdev;
 603         struct hci_filter filter;
 604         __u32             cmsg_mask;
 605 };
 606
 607 /* HCI security filter */
 608 #define HCI_SFLT_MAX_OGF  5
 609
 610 struct hci_sec_filter {
 611         __u32 type_mask;
 612         __u32 event_mask[2];
 613         __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
 614 };
 615
 616 /* ----- HCI requests ----- */
 617 #define HCI_REQ_DONE      0
 618 #define HCI_REQ_PEND      1
 619 #define HCI_REQ_CANCELED  2
 620
 621 #define hci_req_lock(d)         down(&d->req_lock)
 622 #define hci_req_unlock(d)       up(&d->req_lock)
 623
 624 void hci_req_complete(struct hci_dev *hdev, int result);
 625
 626 #endif /* __HCI_CORE_H */