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lguest: documentation V: Host
[linux-2.6/x86.git] / net / bluetooth / hci_core.c
blob63caa414945de3b68e728f7d29fba7f8e7c63bb5
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 /* Bluetooth HCI core. */
26
27 #include <linux/module.h>
28 #include <linux/kmod.h>
29
30 #include <linux/types.h>
31 #include <linux/errno.h>
32 #include <linux/kernel.h>
33 #include <linux/sched.h>
34 #include <linux/slab.h>
35 #include <linux/poll.h>
36 #include <linux/fcntl.h>
37 #include <linux/init.h>
38 #include <linux/skbuff.h>
39 #include <linux/interrupt.h>
40 #include <linux/notifier.h>
41 #include <net/sock.h>
42
43 #include <asm/system.h>
44 #include <asm/uaccess.h>
45 #include <asm/unaligned.h>
46
47 #include <net/bluetooth/bluetooth.h>
48 #include <net/bluetooth/hci_core.h>
49
50 #ifndef CONFIG_BT_HCI_CORE_DEBUG
51 #undef BT_DBG
52 #define BT_DBG(D...)
53 #endif
54
55 static void hci_cmd_task(unsigned long arg);
56 static void hci_rx_task(unsigned long arg);
57 static void hci_tx_task(unsigned long arg);
58 static void hci_notify(struct hci_dev *hdev, int event);
59
60 static DEFINE_RWLOCK(hci_task_lock);
61
62 /* HCI device list */
63 LIST_HEAD(hci_dev_list);
64 DEFINE_RWLOCK(hci_dev_list_lock);
65
66 /* HCI callback list */
67 LIST_HEAD(hci_cb_list);
68 DEFINE_RWLOCK(hci_cb_list_lock);
69
70 /* HCI protocols */
71 #define HCI_MAX_PROTO 2
72 struct hci_proto *hci_proto[HCI_MAX_PROTO];
73
74 /* HCI notifiers list */
75 static ATOMIC_NOTIFIER_HEAD(hci_notifier);
76
77 /* ---- HCI notifications ---- */
78
79 int hci_register_notifier(struct notifier_block *nb)
80 {
81 return atomic_notifier_chain_register(&hci_notifier, nb);
82 }
83
84 int hci_unregister_notifier(struct notifier_block *nb)
85 {
86 return atomic_notifier_chain_unregister(&hci_notifier, nb);
87 }
88
89 static void hci_notify(struct hci_dev *hdev, int event)
90 {
91 atomic_notifier_call_chain(&hci_notifier, event, hdev);
92 }
93
94 /* ---- HCI requests ---- */
95
96 void hci_req_complete(struct hci_dev *hdev, int result)
97 {
98 BT_DBG("%s result 0x%2.2x", hdev->name, result);
99
100 if (hdev->req_status == HCI_REQ_PEND) {
101 hdev->req_result = result;
102 hdev->req_status = HCI_REQ_DONE;
103 wake_up_interruptible(&hdev->req_wait_q);
104 }
105 }
106
107 static void hci_req_cancel(struct hci_dev *hdev, int err)
108 {
109 BT_DBG("%s err 0x%2.2x", hdev->name, err);
110
111 if (hdev->req_status == HCI_REQ_PEND) {
112 hdev->req_result = err;
113 hdev->req_status = HCI_REQ_CANCELED;
114 wake_up_interruptible(&hdev->req_wait_q);
115 }
116 }
117
118 /* Execute request and wait for completion. */
119 static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
120 unsigned long opt, __u32 timeout)
121 {
122 DECLARE_WAITQUEUE(wait, current);
123 int err = 0;
124
125 BT_DBG("%s start", hdev->name);
126
127 hdev->req_status = HCI_REQ_PEND;
128
129 add_wait_queue(&hdev->req_wait_q, &wait);
130 set_current_state(TASK_INTERRUPTIBLE);
131
132 req(hdev, opt);
133 schedule_timeout(timeout);
134
135 remove_wait_queue(&hdev->req_wait_q, &wait);
136
137 if (signal_pending(current))
138 return -EINTR;
139
140 switch (hdev->req_status) {
141 case HCI_REQ_DONE:
142 err = -bt_err(hdev->req_result);
143 break;
144
145 case HCI_REQ_CANCELED:
146 err = -hdev->req_result;
147 break;
148
149 default:
150 err = -ETIMEDOUT;
151 break;
152 }
153
154 hdev->req_status = hdev->req_result = 0;
155
156 BT_DBG("%s end: err %d", hdev->name, err);
157
158 return err;
159 }
160
161 static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
162 unsigned long opt, __u32 timeout)
163 {
164 int ret;
165
166 /* Serialize all requests */
167 hci_req_lock(hdev);
168 ret = __hci_request(hdev, req, opt, timeout);
169 hci_req_unlock(hdev);
170
171 return ret;
172 }
173
174 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
175 {
176 BT_DBG("%s %ld", hdev->name, opt);
177
178 /* Reset device */
179 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_RESET, 0, NULL);
180 }
181
182 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
183 {
184 struct sk_buff *skb;
185 __le16 param;
186
187 BT_DBG("%s %ld", hdev->name, opt);
188
189 /* Driver initialization */
190
191 /* Special commands */
192 while ((skb = skb_dequeue(&hdev->driver_init))) {
193 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
194 skb->dev = (void *) hdev;
195 skb_queue_tail(&hdev->cmd_q, skb);
196 hci_sched_cmd(hdev);
197 }
198 skb_queue_purge(&hdev->driver_init);
199
200 /* Mandatory initialization */
201
202 /* Reset */
203 if (test_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks))
204 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_RESET, 0, NULL);
205
206 /* Read Local Supported Features */
207 hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_LOCAL_FEATURES, 0, NULL);
208
209 /* Read Local Version */
210 hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_LOCAL_VERSION, 0, NULL);
211
212 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
213 hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_BUFFER_SIZE, 0, NULL);
214
215 #if 0
216 /* Host buffer size */
217 {
218 struct hci_cp_host_buffer_size cp;
219 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
220 cp.sco_mtu = HCI_MAX_SCO_SIZE;
221 cp.acl_max_pkt = cpu_to_le16(0xffff);
222 cp.sco_max_pkt = cpu_to_le16(0xffff);
223 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_HOST_BUFFER_SIZE, sizeof(cp), &cp);
224 }
225 #endif
226
227 /* Read BD Address */
228 hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_BD_ADDR, 0, NULL);
229
230 /* Read Voice Setting */
231 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_READ_VOICE_SETTING, 0, NULL);
232
233 /* Optional initialization */
234
235 /* Clear Event Filters */
236 {
237 struct hci_cp_set_event_flt cp;
238 cp.flt_type = HCI_FLT_CLEAR_ALL;
239 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_SET_EVENT_FLT, sizeof(cp), &cp);
240 }
241
242 /* Page timeout ~20 secs */
243 param = cpu_to_le16(0x8000);
244 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_PG_TIMEOUT, 2, &param);
245
246 /* Connection accept timeout ~20 secs */
247 param = cpu_to_le16(0x7d00);
248 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_CA_TIMEOUT, 2, &param);
249 }
250
251 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
252 {
253 __u8 scan = opt;
254
255 BT_DBG("%s %x", hdev->name, scan);
256
257 /* Inquiry and Page scans */
258 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_SCAN_ENABLE, 1, &scan);
259 }
260
261 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
262 {
263 __u8 auth = opt;
264
265 BT_DBG("%s %x", hdev->name, auth);
266
267 /* Authentication */
268 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_AUTH_ENABLE, 1, &auth);
269 }
270
271 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
272 {
273 __u8 encrypt = opt;
274
275 BT_DBG("%s %x", hdev->name, encrypt);
276
277 /* Authentication */
278 hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_ENCRYPT_MODE, 1, &encrypt);
279 }
280
281 /* Get HCI device by index.
282 * Device is held on return. */
283 struct hci_dev *hci_dev_get(int index)
284 {
285 struct hci_dev *hdev = NULL;
286 struct list_head *p;
287
288 BT_DBG("%d", index);
289
290 if (index < 0)
291 return NULL;
292
293 read_lock(&hci_dev_list_lock);
294 list_for_each(p, &hci_dev_list) {
295 struct hci_dev *d = list_entry(p, struct hci_dev, list);
296 if (d->id == index) {
297 hdev = hci_dev_hold(d);
298 break;
299 }
300 }
301 read_unlock(&hci_dev_list_lock);
302 return hdev;
303 }
304
305 /* ---- Inquiry support ---- */
306 static void inquiry_cache_flush(struct hci_dev *hdev)
307 {
308 struct inquiry_cache *cache = &hdev->inq_cache;
309 struct inquiry_entry *next = cache->list, *e;
310
311 BT_DBG("cache %p", cache);
312
313 cache->list = NULL;
314 while ((e = next)) {
315 next = e->next;
316 kfree(e);
317 }
318 }
319
320 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
321 {
322 struct inquiry_cache *cache = &hdev->inq_cache;
323 struct inquiry_entry *e;
324
325 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
326
327 for (e = cache->list; e; e = e->next)
328 if (!bacmp(&e->data.bdaddr, bdaddr))
329 break;
330 return e;
331 }
332
333 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
334 {
335 struct inquiry_cache *cache = &hdev->inq_cache;
336 struct inquiry_entry *e;
337
338 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
339
340 if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) {
341 /* Entry not in the cache. Add new one. */
342 if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC)))
343 return;
344 e->next = cache->list;
345 cache->list = e;
346 }
347
348 memcpy(&e->data, data, sizeof(*data));
349 e->timestamp = jiffies;
350 cache->timestamp = jiffies;
351 }
352
353 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
354 {
355 struct inquiry_cache *cache = &hdev->inq_cache;
356 struct inquiry_info *info = (struct inquiry_info *) buf;
357 struct inquiry_entry *e;
358 int copied = 0;
359
360 for (e = cache->list; e && copied < num; e = e->next, copied++) {
361 struct inquiry_data *data = &e->data;
362 bacpy(&info->bdaddr, &data->bdaddr);
363 info->pscan_rep_mode = data->pscan_rep_mode;
364 info->pscan_period_mode = data->pscan_period_mode;
365 info->pscan_mode = data->pscan_mode;
366 memcpy(info->dev_class, data->dev_class, 3);
367 info->clock_offset = data->clock_offset;
368 info++;
369 }
370
371 BT_DBG("cache %p, copied %d", cache, copied);
372 return copied;
373 }
374
375 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
376 {
377 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
378 struct hci_cp_inquiry cp;
379
380 BT_DBG("%s", hdev->name);
381
382 if (test_bit(HCI_INQUIRY, &hdev->flags))
383 return;
384
385 /* Start Inquiry */
386 memcpy(&cp.lap, &ir->lap, 3);
387 cp.length = ir->length;
388 cp.num_rsp = ir->num_rsp;
389 hci_send_cmd(hdev, OGF_LINK_CTL, OCF_INQUIRY, sizeof(cp), &cp);
390 }
391
392 int hci_inquiry(void __user *arg)
393 {
394 __u8 __user *ptr = arg;
395 struct hci_inquiry_req ir;
396 struct hci_dev *hdev;
397 int err = 0, do_inquiry = 0, max_rsp;
398 long timeo;
399 __u8 *buf;
400
401 if (copy_from_user(&ir, ptr, sizeof(ir)))
402 return -EFAULT;
403
404 if (!(hdev = hci_dev_get(ir.dev_id)))
405 return -ENODEV;
406
407 hci_dev_lock_bh(hdev);
408 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
409 inquiry_cache_empty(hdev) ||
410 ir.flags & IREQ_CACHE_FLUSH) {
411 inquiry_cache_flush(hdev);
412 do_inquiry = 1;
413 }
414 hci_dev_unlock_bh(hdev);
415
416 timeo = ir.length * msecs_to_jiffies(2000);
417 if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0)
418 goto done;
419
420 /* for unlimited number of responses we will use buffer with 255 entries */
421 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
422
423 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
424 * copy it to the user space.
425 */
426 if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) {
427 err = -ENOMEM;
428 goto done;
429 }
430
431 hci_dev_lock_bh(hdev);
432 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
433 hci_dev_unlock_bh(hdev);
434
435 BT_DBG("num_rsp %d", ir.num_rsp);
436
437 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
438 ptr += sizeof(ir);
439 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
440 ir.num_rsp))
441 err = -EFAULT;
442 } else
443 err = -EFAULT;
444
445 kfree(buf);
446
447 done:
448 hci_dev_put(hdev);
449 return err;
450 }
451
452 /* ---- HCI ioctl helpers ---- */
453
454 int hci_dev_open(__u16 dev)
455 {
456 struct hci_dev *hdev;
457 int ret = 0;
458
459 if (!(hdev = hci_dev_get(dev)))
460 return -ENODEV;
461
462 BT_DBG("%s %p", hdev->name, hdev);
463
464 hci_req_lock(hdev);
465
466 if (test_bit(HCI_UP, &hdev->flags)) {
467 ret = -EALREADY;
468 goto done;
469 }
470
471 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
472 set_bit(HCI_RAW, &hdev->flags);
473
474 if (hdev->open(hdev)) {
475 ret = -EIO;
476 goto done;
477 }
478
479 if (!test_bit(HCI_RAW, &hdev->flags)) {
480 atomic_set(&hdev->cmd_cnt, 1);
481 set_bit(HCI_INIT, &hdev->flags);
482
483 //__hci_request(hdev, hci_reset_req, 0, HZ);
484 ret = __hci_request(hdev, hci_init_req, 0,
485 msecs_to_jiffies(HCI_INIT_TIMEOUT));
486
487 clear_bit(HCI_INIT, &hdev->flags);
488 }
489
490 if (!ret) {
491 hci_dev_hold(hdev);
492 set_bit(HCI_UP, &hdev->flags);
493 hci_notify(hdev, HCI_DEV_UP);
494 } else {
495 /* Init failed, cleanup */
496 tasklet_kill(&hdev->rx_task);
497 tasklet_kill(&hdev->tx_task);
498 tasklet_kill(&hdev->cmd_task);
499
500 skb_queue_purge(&hdev->cmd_q);
501 skb_queue_purge(&hdev->rx_q);
502
503 if (hdev->flush)
504 hdev->flush(hdev);
505
506 if (hdev->sent_cmd) {
507 kfree_skb(hdev->sent_cmd);
508 hdev->sent_cmd = NULL;
509 }
510
511 hdev->close(hdev);
512 hdev->flags = 0;
513 }
514
515 done:
516 hci_req_unlock(hdev);
517 hci_dev_put(hdev);
518 return ret;
519 }
520
521 static int hci_dev_do_close(struct hci_dev *hdev)
522 {
523 BT_DBG("%s %p", hdev->name, hdev);
524
525 hci_req_cancel(hdev, ENODEV);
526 hci_req_lock(hdev);
527
528 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
529 hci_req_unlock(hdev);
530 return 0;
531 }
532
533 /* Kill RX and TX tasks */
534 tasklet_kill(&hdev->rx_task);
535 tasklet_kill(&hdev->tx_task);
536
537 hci_dev_lock_bh(hdev);
538 inquiry_cache_flush(hdev);
539 hci_conn_hash_flush(hdev);
540 hci_dev_unlock_bh(hdev);
541
542 hci_notify(hdev, HCI_DEV_DOWN);
543
544 if (hdev->flush)
545 hdev->flush(hdev);
546
547 /* Reset device */
548 skb_queue_purge(&hdev->cmd_q);
549 atomic_set(&hdev->cmd_cnt, 1);
550 if (!test_bit(HCI_RAW, &hdev->flags)) {
551 set_bit(HCI_INIT, &hdev->flags);
552 __hci_request(hdev, hci_reset_req, 0,
553 msecs_to_jiffies(250));
554 clear_bit(HCI_INIT, &hdev->flags);
555 }
556
557 /* Kill cmd task */
558 tasklet_kill(&hdev->cmd_task);
559
560 /* Drop queues */
561 skb_queue_purge(&hdev->rx_q);
562 skb_queue_purge(&hdev->cmd_q);
563 skb_queue_purge(&hdev->raw_q);
564
565 /* Drop last sent command */
566 if (hdev->sent_cmd) {
567 kfree_skb(hdev->sent_cmd);
568 hdev->sent_cmd = NULL;
569 }
570
571 /* After this point our queues are empty
572 * and no tasks are scheduled. */
573 hdev->close(hdev);
574
575 /* Clear flags */
576 hdev->flags = 0;
577
578 hci_req_unlock(hdev);
579
580 hci_dev_put(hdev);
581 return 0;
582 }
583
584 int hci_dev_close(__u16 dev)
585 {
586 struct hci_dev *hdev;
587 int err;
588
589 if (!(hdev = hci_dev_get(dev)))
590 return -ENODEV;
591 err = hci_dev_do_close(hdev);
592 hci_dev_put(hdev);
593 return err;
594 }
595
596 int hci_dev_reset(__u16 dev)
597 {
598 struct hci_dev *hdev;
599 int ret = 0;
600
601 if (!(hdev = hci_dev_get(dev)))
602 return -ENODEV;
603
604 hci_req_lock(hdev);
605 tasklet_disable(&hdev->tx_task);
606
607 if (!test_bit(HCI_UP, &hdev->flags))
608 goto done;
609
610 /* Drop queues */
611 skb_queue_purge(&hdev->rx_q);
612 skb_queue_purge(&hdev->cmd_q);
613
614 hci_dev_lock_bh(hdev);
615 inquiry_cache_flush(hdev);
616 hci_conn_hash_flush(hdev);
617 hci_dev_unlock_bh(hdev);
618
619 if (hdev->flush)
620 hdev->flush(hdev);
621
622 atomic_set(&hdev->cmd_cnt, 1);
623 hdev->acl_cnt = 0; hdev->sco_cnt = 0;
624
625 if (!test_bit(HCI_RAW, &hdev->flags))
626 ret = __hci_request(hdev, hci_reset_req, 0,
627 msecs_to_jiffies(HCI_INIT_TIMEOUT));
628
629 done:
630 tasklet_enable(&hdev->tx_task);
631 hci_req_unlock(hdev);
632 hci_dev_put(hdev);
633 return ret;
634 }
635
636 int hci_dev_reset_stat(__u16 dev)
637 {
638 struct hci_dev *hdev;
639 int ret = 0;
640
641 if (!(hdev = hci_dev_get(dev)))
642 return -ENODEV;
643
644 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
645
646 hci_dev_put(hdev);
647
648 return ret;
649 }
650
651 int hci_dev_cmd(unsigned int cmd, void __user *arg)
652 {
653 struct hci_dev *hdev;
654 struct hci_dev_req dr;
655 int err = 0;
656
657 if (copy_from_user(&dr, arg, sizeof(dr)))
658 return -EFAULT;
659
660 if (!(hdev = hci_dev_get(dr.dev_id)))
661 return -ENODEV;
662
663 switch (cmd) {
664 case HCISETAUTH:
665 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
666 msecs_to_jiffies(HCI_INIT_TIMEOUT));
667 break;
668
669 case HCISETENCRYPT:
670 if (!lmp_encrypt_capable(hdev)) {
671 err = -EOPNOTSUPP;
672 break;
673 }
674
675 if (!test_bit(HCI_AUTH, &hdev->flags)) {
676 /* Auth must be enabled first */
677 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
678 msecs_to_jiffies(HCI_INIT_TIMEOUT));
679 if (err)
680 break;
681 }
682
683 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
684 msecs_to_jiffies(HCI_INIT_TIMEOUT));
685 break;
686
687 case HCISETSCAN:
688 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
689 msecs_to_jiffies(HCI_INIT_TIMEOUT));
690 break;
691
692 case HCISETPTYPE:
693 hdev->pkt_type = (__u16) dr.dev_opt;
694 break;
695
696 case HCISETLINKPOL:
697 hdev->link_policy = (__u16) dr.dev_opt;
698 break;
699
700 case HCISETLINKMODE:
701 hdev->link_mode = ((__u16) dr.dev_opt) & (HCI_LM_MASTER | HCI_LM_ACCEPT);
702 break;
703
704 case HCISETACLMTU:
705 hdev->acl_mtu = *((__u16 *)&dr.dev_opt + 1);
706 hdev->acl_pkts = *((__u16 *)&dr.dev_opt + 0);
707 break;
708
709 case HCISETSCOMTU:
710 hdev->sco_mtu = *((__u16 *)&dr.dev_opt + 1);
711 hdev->sco_pkts = *((__u16 *)&dr.dev_opt + 0);
712 break;
713
714 default:
715 err = -EINVAL;
716 break;
717 }
718 hci_dev_put(hdev);
719 return err;
720 }
721
722 int hci_get_dev_list(void __user *arg)
723 {
724 struct hci_dev_list_req *dl;
725 struct hci_dev_req *dr;
726 struct list_head *p;
727 int n = 0, size, err;
728 __u16 dev_num;
729
730 if (get_user(dev_num, (__u16 __user *) arg))
731 return -EFAULT;
732
733 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
734 return -EINVAL;
735
736 size = sizeof(*dl) + dev_num * sizeof(*dr);
737
738 if (!(dl = kmalloc(size, GFP_KERNEL)))
739 return -ENOMEM;
740
741 dr = dl->dev_req;
742
743 read_lock_bh(&hci_dev_list_lock);
744 list_for_each(p, &hci_dev_list) {
745 struct hci_dev *hdev;
746 hdev = list_entry(p, struct hci_dev, list);
747 (dr + n)->dev_id = hdev->id;
748 (dr + n)->dev_opt = hdev->flags;
749 if (++n >= dev_num)
750 break;
751 }
752 read_unlock_bh(&hci_dev_list_lock);
753
754 dl->dev_num = n;
755 size = sizeof(*dl) + n * sizeof(*dr);
756
757 err = copy_to_user(arg, dl, size);
758 kfree(dl);
759
760 return err ? -EFAULT : 0;
761 }
762
763 int hci_get_dev_info(void __user *arg)
764 {
765 struct hci_dev *hdev;
766 struct hci_dev_info di;
767 int err = 0;
768
769 if (copy_from_user(&di, arg, sizeof(di)))
770 return -EFAULT;
771
772 if (!(hdev = hci_dev_get(di.dev_id)))
773 return -ENODEV;
774
775 strcpy(di.name, hdev->name);
776 di.bdaddr = hdev->bdaddr;
777 di.type = hdev->type;
778 di.flags = hdev->flags;
779 di.pkt_type = hdev->pkt_type;
780 di.acl_mtu = hdev->acl_mtu;
781 di.acl_pkts = hdev->acl_pkts;
782 di.sco_mtu = hdev->sco_mtu;
783 di.sco_pkts = hdev->sco_pkts;
784 di.link_policy = hdev->link_policy;
785 di.link_mode = hdev->link_mode;
786
787 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
788 memcpy(&di.features, &hdev->features, sizeof(di.features));
789
790 if (copy_to_user(arg, &di, sizeof(di)))
791 err = -EFAULT;
792
793 hci_dev_put(hdev);
794
795 return err;
796 }
797
798 /* ---- Interface to HCI drivers ---- */
799
800 /* Alloc HCI device */
801 struct hci_dev *hci_alloc_dev(void)
802 {
803 struct hci_dev *hdev;
804
805 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
806 if (!hdev)
807 return NULL;
808
809 skb_queue_head_init(&hdev->driver_init);
810
811 return hdev;
812 }
813 EXPORT_SYMBOL(hci_alloc_dev);
814
815 /* Free HCI device */
816 void hci_free_dev(struct hci_dev *hdev)
817 {
818 skb_queue_purge(&hdev->driver_init);
819
820 /* will free via device release */
821 put_device(&hdev->dev);
822 }
823 EXPORT_SYMBOL(hci_free_dev);
824
825 /* Register HCI device */
826 int hci_register_dev(struct hci_dev *hdev)
827 {
828 struct list_head *head = &hci_dev_list, *p;
829 int i, id = 0;
830
831 BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner);
832
833 if (!hdev->open || !hdev->close || !hdev->destruct)
834 return -EINVAL;
835
836 write_lock_bh(&hci_dev_list_lock);
837
838 /* Find first available device id */
839 list_for_each(p, &hci_dev_list) {
840 if (list_entry(p, struct hci_dev, list)->id != id)
841 break;
842 head = p; id++;
843 }
844
845 sprintf(hdev->name, "hci%d", id);
846 hdev->id = id;
847 list_add(&hdev->list, head);
848
849 atomic_set(&hdev->refcnt, 1);
850 spin_lock_init(&hdev->lock);
851
852 hdev->flags = 0;
853 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
854 hdev->esco_type = (ESCO_HV1);
855 hdev->link_mode = (HCI_LM_ACCEPT);
856
857 hdev->idle_timeout = 0;
858 hdev->sniff_max_interval = 800;
859 hdev->sniff_min_interval = 80;
860
861 tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev);
862 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
863 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
864
865 skb_queue_head_init(&hdev->rx_q);
866 skb_queue_head_init(&hdev->cmd_q);
867 skb_queue_head_init(&hdev->raw_q);
868
869 for (i = 0; i < 3; i++)
870 hdev->reassembly[i] = NULL;
871
872 init_waitqueue_head(&hdev->req_wait_q);
873 init_MUTEX(&hdev->req_lock);
874
875 inquiry_cache_init(hdev);
876
877 hci_conn_hash_init(hdev);
878
879 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
880
881 atomic_set(&hdev->promisc, 0);
882
883 write_unlock_bh(&hci_dev_list_lock);
884
885 hci_register_sysfs(hdev);
886
887 hci_notify(hdev, HCI_DEV_REG);
888
889 return id;
890 }
891 EXPORT_SYMBOL(hci_register_dev);
892
893 /* Unregister HCI device */
894 int hci_unregister_dev(struct hci_dev *hdev)
895 {
896 int i;
897
898 BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
899
900 hci_unregister_sysfs(hdev);
901
902 write_lock_bh(&hci_dev_list_lock);
903 list_del(&hdev->list);
904 write_unlock_bh(&hci_dev_list_lock);
905
906 hci_dev_do_close(hdev);
907
908 for (i = 0; i < 3; i++)
909 kfree_skb(hdev->reassembly[i]);
910
911 hci_notify(hdev, HCI_DEV_UNREG);
912
913 __hci_dev_put(hdev);
914
915 return 0;
916 }
917 EXPORT_SYMBOL(hci_unregister_dev);
918
919 /* Suspend HCI device */
920 int hci_suspend_dev(struct hci_dev *hdev)
921 {
922 hci_notify(hdev, HCI_DEV_SUSPEND);
923 return 0;
924 }
925 EXPORT_SYMBOL(hci_suspend_dev);
926
927 /* Resume HCI device */
928 int hci_resume_dev(struct hci_dev *hdev)
929 {
930 hci_notify(hdev, HCI_DEV_RESUME);
931 return 0;
932 }
933 EXPORT_SYMBOL(hci_resume_dev);
934
935 /* Receive packet type fragment */
936 #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2])
937
938 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
939 {
940 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
941 return -EILSEQ;
942
943 while (count) {
944 struct sk_buff *skb = __reassembly(hdev, type);
945 struct { int expect; } *scb;
946 int len = 0;
947
948 if (!skb) {
949 /* Start of the frame */
950
951 switch (type) {
952 case HCI_EVENT_PKT:
953 if (count >= HCI_EVENT_HDR_SIZE) {
954 struct hci_event_hdr *h = data;
955 len = HCI_EVENT_HDR_SIZE + h->plen;
956 } else
957 return -EILSEQ;
958 break;
959
960 case HCI_ACLDATA_PKT:
961 if (count >= HCI_ACL_HDR_SIZE) {
962 struct hci_acl_hdr *h = data;
963 len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen);
964 } else
965 return -EILSEQ;
966 break;
967
968 case HCI_SCODATA_PKT:
969 if (count >= HCI_SCO_HDR_SIZE) {
970 struct hci_sco_hdr *h = data;
971 len = HCI_SCO_HDR_SIZE + h->dlen;
972 } else
973 return -EILSEQ;
974 break;
975 }
976
977 skb = bt_skb_alloc(len, GFP_ATOMIC);
978 if (!skb) {
979 BT_ERR("%s no memory for packet", hdev->name);
980 return -ENOMEM;
981 }
982
983 skb->dev = (void *) hdev;
984 bt_cb(skb)->pkt_type = type;
985
986 __reassembly(hdev, type) = skb;
987
988 scb = (void *) skb->cb;
989 scb->expect = len;
990 } else {
991 /* Continuation */
992
993 scb = (void *) skb->cb;
994 len = scb->expect;
995 }
996
997 len = min(len, count);
998
999 memcpy(skb_put(skb, len), data, len);
1000
1001 scb->expect -= len;
1002
1003 if (scb->expect == 0) {
1004 /* Complete frame */
1005
1006 __reassembly(hdev, type) = NULL;
1007
1008 bt_cb(skb)->pkt_type = type;
1009 hci_recv_frame(skb);
1010 }
1011
1012 count -= len; data += len;
1013 }
1014
1015 return 0;
1016 }
1017 EXPORT_SYMBOL(hci_recv_fragment);
1018
1019 /* ---- Interface to upper protocols ---- */
1020
1021 /* Register/Unregister protocols.
1022 * hci_task_lock is used to ensure that no tasks are running. */
1023 int hci_register_proto(struct hci_proto *hp)
1024 {
1025 int err = 0;
1026
1027 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1028
1029 if (hp->id >= HCI_MAX_PROTO)
1030 return -EINVAL;
1031
1032 write_lock_bh(&hci_task_lock);
1033
1034 if (!hci_proto[hp->id])
1035 hci_proto[hp->id] = hp;
1036 else
1037 err = -EEXIST;
1038
1039 write_unlock_bh(&hci_task_lock);
1040
1041 return err;
1042 }
1043 EXPORT_SYMBOL(hci_register_proto);
1044
1045 int hci_unregister_proto(struct hci_proto *hp)
1046 {
1047 int err = 0;
1048
1049 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1050
1051 if (hp->id >= HCI_MAX_PROTO)
1052 return -EINVAL;
1053
1054 write_lock_bh(&hci_task_lock);
1055
1056 if (hci_proto[hp->id])
1057 hci_proto[hp->id] = NULL;
1058 else
1059 err = -ENOENT;
1060
1061 write_unlock_bh(&hci_task_lock);
1062
1063 return err;
1064 }
1065 EXPORT_SYMBOL(hci_unregister_proto);
1066
1067 int hci_register_cb(struct hci_cb *cb)
1068 {
1069 BT_DBG("%p name %s", cb, cb->name);
1070
1071 write_lock_bh(&hci_cb_list_lock);
1072 list_add(&cb->list, &hci_cb_list);
1073 write_unlock_bh(&hci_cb_list_lock);
1074
1075 return 0;
1076 }
1077 EXPORT_SYMBOL(hci_register_cb);
1078
1079 int hci_unregister_cb(struct hci_cb *cb)
1080 {
1081 BT_DBG("%p name %s", cb, cb->name);
1082
1083 write_lock_bh(&hci_cb_list_lock);
1084 list_del(&cb->list);
1085 write_unlock_bh(&hci_cb_list_lock);
1086
1087 return 0;
1088 }
1089 EXPORT_SYMBOL(hci_unregister_cb);
1090
1091 static int hci_send_frame(struct sk_buff *skb)
1092 {
1093 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1094
1095 if (!hdev) {
1096 kfree_skb(skb);
1097 return -ENODEV;
1098 }
1099
1100 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1101
1102 if (atomic_read(&hdev->promisc)) {
1103 /* Time stamp */
1104 __net_timestamp(skb);
1105
1106 hci_send_to_sock(hdev, skb);
1107 }
1108
1109 /* Get rid of skb owner, prior to sending to the driver. */
1110 skb_orphan(skb);
1111
1112 return hdev->send(skb);
1113 }
1114
1115 /* Send HCI command */
1116 int hci_send_cmd(struct hci_dev *hdev, __u16 ogf, __u16 ocf, __u32 plen, void *param)
1117 {
1118 int len = HCI_COMMAND_HDR_SIZE + plen;
1119 struct hci_command_hdr *hdr;
1120 struct sk_buff *skb;
1121
1122 BT_DBG("%s ogf 0x%x ocf 0x%x plen %d", hdev->name, ogf, ocf, plen);
1123
1124 skb = bt_skb_alloc(len, GFP_ATOMIC);
1125 if (!skb) {
1126 BT_ERR("%s no memory for command", hdev->name);
1127 return -ENOMEM;
1128 }
1129
1130 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
1131 hdr->opcode = cpu_to_le16(hci_opcode_pack(ogf, ocf));
1132 hdr->plen = plen;
1133
1134 if (plen)
1135 memcpy(skb_put(skb, plen), param, plen);
1136
1137 BT_DBG("skb len %d", skb->len);
1138
1139 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1140 skb->dev = (void *) hdev;
1141 skb_queue_tail(&hdev->cmd_q, skb);
1142 hci_sched_cmd(hdev);
1143
1144 return 0;
1145 }
1146
1147 /* Get data from the previously sent command */
1148 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 ogf, __u16 ocf)
1149 {
1150 struct hci_command_hdr *hdr;
1151
1152 if (!hdev->sent_cmd)
1153 return NULL;
1154
1155 hdr = (void *) hdev->sent_cmd->data;
1156
1157 if (hdr->opcode != cpu_to_le16(hci_opcode_pack(ogf, ocf)))
1158 return NULL;
1159
1160 BT_DBG("%s ogf 0x%x ocf 0x%x", hdev->name, ogf, ocf);
1161
1162 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1163 }
1164
1165 /* Send ACL data */
1166 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1167 {
1168 struct hci_acl_hdr *hdr;
1169 int len = skb->len;
1170
1171 skb_push(skb, HCI_ACL_HDR_SIZE);
1172 skb_reset_transport_header(skb);
1173 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
1174 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1175 hdr->dlen = cpu_to_le16(len);
1176 }
1177
1178 int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1179 {
1180 struct hci_dev *hdev = conn->hdev;
1181 struct sk_buff *list;
1182
1183 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1184
1185 skb->dev = (void *) hdev;
1186 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1187 hci_add_acl_hdr(skb, conn->handle, flags | ACL_START);
1188
1189 if (!(list = skb_shinfo(skb)->frag_list)) {
1190 /* Non fragmented */
1191 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1192
1193 skb_queue_tail(&conn->data_q, skb);
1194 } else {
1195 /* Fragmented */
1196 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1197
1198 skb_shinfo(skb)->frag_list = NULL;
1199
1200 /* Queue all fragments atomically */
1201 spin_lock_bh(&conn->data_q.lock);
1202
1203 __skb_queue_tail(&conn->data_q, skb);
1204 do {
1205 skb = list; list = list->next;
1206
1207 skb->dev = (void *) hdev;
1208 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1209 hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT);
1210
1211 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1212
1213 __skb_queue_tail(&conn->data_q, skb);
1214 } while (list);
1215
1216 spin_unlock_bh(&conn->data_q.lock);
1217 }
1218
1219 hci_sched_tx(hdev);
1220 return 0;
1221 }
1222 EXPORT_SYMBOL(hci_send_acl);
1223
1224 /* Send SCO data */
1225 int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1226 {
1227 struct hci_dev *hdev = conn->hdev;
1228 struct hci_sco_hdr hdr;
1229
1230 BT_DBG("%s len %d", hdev->name, skb->len);
1231
1232 if (skb->len > hdev->sco_mtu) {
1233 kfree_skb(skb);
1234 return -EINVAL;
1235 }
1236
1237 hdr.handle = cpu_to_le16(conn->handle);
1238 hdr.dlen = skb->len;
1239
1240 skb_push(skb, HCI_SCO_HDR_SIZE);
1241 skb_reset_transport_header(skb);
1242 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1243
1244 skb->dev = (void *) hdev;
1245 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
1246 skb_queue_tail(&conn->data_q, skb);
1247 hci_sched_tx(hdev);
1248 return 0;
1249 }
1250 EXPORT_SYMBOL(hci_send_sco);
1251
1252 /* ---- HCI TX task (outgoing data) ---- */
1253
1254 /* HCI Connection scheduler */
1255 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
1256 {
1257 struct hci_conn_hash *h = &hdev->conn_hash;
1258 struct hci_conn *conn = NULL;
1259 int num = 0, min = ~0;
1260 struct list_head *p;
1261
1262 /* We don't have to lock device here. Connections are always
1263 * added and removed with TX task disabled. */
1264 list_for_each(p, &h->list) {
1265 struct hci_conn *c;
1266 c = list_entry(p, struct hci_conn, list);
1267
1268 if (c->type != type || c->state != BT_CONNECTED
1269 || skb_queue_empty(&c->data_q))
1270 continue;
1271 num++;
1272
1273 if (c->sent < min) {
1274 min = c->sent;
1275 conn = c;
1276 }
1277 }
1278
1279 if (conn) {
1280 int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
1281 int q = cnt / num;
1282 *quote = q ? q : 1;
1283 } else
1284 *quote = 0;
1285
1286 BT_DBG("conn %p quote %d", conn, *quote);
1287 return conn;
1288 }
1289
1290 static inline void hci_acl_tx_to(struct hci_dev *hdev)
1291 {
1292 struct hci_conn_hash *h = &hdev->conn_hash;
1293 struct list_head *p;
1294 struct hci_conn *c;
1295
1296 BT_ERR("%s ACL tx timeout", hdev->name);
1297
1298 /* Kill stalled connections */
1299 list_for_each(p, &h->list) {
1300 c = list_entry(p, struct hci_conn, list);
1301 if (c->type == ACL_LINK && c->sent) {
1302 BT_ERR("%s killing stalled ACL connection %s",
1303 hdev->name, batostr(&c->dst));
1304 hci_acl_disconn(c, 0x13);
1305 }
1306 }
1307 }
1308
1309 static inline void hci_sched_acl(struct hci_dev *hdev)
1310 {
1311 struct hci_conn *conn;
1312 struct sk_buff *skb;
1313 int quote;
1314
1315 BT_DBG("%s", hdev->name);
1316
1317 if (!test_bit(HCI_RAW, &hdev->flags)) {
1318 /* ACL tx timeout must be longer than maximum
1319 * link supervision timeout (40.9 seconds) */
1320 if (!hdev->acl_cnt && (jiffies - hdev->acl_last_tx) > (HZ * 45))
1321 hci_acl_tx_to(hdev);
1322 }
1323
1324 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
1325 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1326 BT_DBG("skb %p len %d", skb, skb->len);
1327
1328 hci_conn_enter_active_mode(conn);
1329
1330 hci_send_frame(skb);
1331 hdev->acl_last_tx = jiffies;
1332
1333 hdev->acl_cnt--;
1334 conn->sent++;
1335 }
1336 }
1337 }
1338
1339 /* Schedule SCO */
1340 static inline void hci_sched_sco(struct hci_dev *hdev)
1341 {
1342 struct hci_conn *conn;
1343 struct sk_buff *skb;
1344 int quote;
1345
1346 BT_DBG("%s", hdev->name);
1347
1348 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
1349 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1350 BT_DBG("skb %p len %d", skb, skb->len);
1351 hci_send_frame(skb);
1352
1353 conn->sent++;
1354 if (conn->sent == ~0)
1355 conn->sent = 0;
1356 }
1357 }
1358 }
1359
1360 static void hci_tx_task(unsigned long arg)
1361 {
1362 struct hci_dev *hdev = (struct hci_dev *) arg;
1363 struct sk_buff *skb;
1364
1365 read_lock(&hci_task_lock);
1366
1367 BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
1368
1369 /* Schedule queues and send stuff to HCI driver */
1370
1371 hci_sched_acl(hdev);
1372
1373 hci_sched_sco(hdev);
1374
1375 /* Send next queued raw (unknown type) packet */
1376 while ((skb = skb_dequeue(&hdev->raw_q)))
1377 hci_send_frame(skb);
1378
1379 read_unlock(&hci_task_lock);
1380 }
1381
1382 /* ----- HCI RX task (incoming data proccessing) ----- */
1383
1384 /* ACL data packet */
1385 static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1386 {
1387 struct hci_acl_hdr *hdr = (void *) skb->data;
1388 struct hci_conn *conn;
1389 __u16 handle, flags;
1390
1391 skb_pull(skb, HCI_ACL_HDR_SIZE);
1392
1393 handle = __le16_to_cpu(hdr->handle);
1394 flags = hci_flags(handle);
1395 handle = hci_handle(handle);
1396
1397 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
1398
1399 hdev->stat.acl_rx++;
1400
1401 hci_dev_lock(hdev);
1402 conn = hci_conn_hash_lookup_handle(hdev, handle);
1403 hci_dev_unlock(hdev);
1404
1405 if (conn) {
1406 register struct hci_proto *hp;
1407
1408 hci_conn_enter_active_mode(conn);
1409
1410 /* Send to upper protocol */
1411 if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) {
1412 hp->recv_acldata(conn, skb, flags);
1413 return;
1414 }
1415 } else {
1416 BT_ERR("%s ACL packet for unknown connection handle %d",
1417 hdev->name, handle);
1418 }
1419
1420 kfree_skb(skb);
1421 }
1422
1423 /* SCO data packet */
1424 static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1425 {
1426 struct hci_sco_hdr *hdr = (void *) skb->data;
1427 struct hci_conn *conn;
1428 __u16 handle;
1429
1430 skb_pull(skb, HCI_SCO_HDR_SIZE);
1431
1432 handle = __le16_to_cpu(hdr->handle);
1433
1434 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
1435
1436 hdev->stat.sco_rx++;
1437
1438 hci_dev_lock(hdev);
1439 conn = hci_conn_hash_lookup_handle(hdev, handle);
1440 hci_dev_unlock(hdev);
1441
1442 if (conn) {
1443 register struct hci_proto *hp;
1444
1445 /* Send to upper protocol */
1446 if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) {
1447 hp->recv_scodata(conn, skb);
1448 return;
1449 }
1450 } else {
1451 BT_ERR("%s SCO packet for unknown connection handle %d",
1452 hdev->name, handle);
1453 }
1454
1455 kfree_skb(skb);
1456 }
1457
1458 static void hci_rx_task(unsigned long arg)
1459 {
1460 struct hci_dev *hdev = (struct hci_dev *) arg;
1461 struct sk_buff *skb;
1462
1463 BT_DBG("%s", hdev->name);
1464
1465 read_lock(&hci_task_lock);
1466
1467 while ((skb = skb_dequeue(&hdev->rx_q))) {
1468 if (atomic_read(&hdev->promisc)) {
1469 /* Send copy to the sockets */
1470 hci_send_to_sock(hdev, skb);
1471 }
1472
1473 if (test_bit(HCI_RAW, &hdev->flags)) {
1474 kfree_skb(skb);
1475 continue;
1476 }
1477
1478 if (test_bit(HCI_INIT, &hdev->flags)) {
1479 /* Don't process data packets in this states. */
1480 switch (bt_cb(skb)->pkt_type) {
1481 case HCI_ACLDATA_PKT:
1482 case HCI_SCODATA_PKT:
1483 kfree_skb(skb);
1484 continue;
1485 }
1486 }
1487
1488 /* Process frame */
1489 switch (bt_cb(skb)->pkt_type) {
1490 case HCI_EVENT_PKT:
1491 hci_event_packet(hdev, skb);
1492 break;
1493
1494 case HCI_ACLDATA_PKT:
1495 BT_DBG("%s ACL data packet", hdev->name);
1496 hci_acldata_packet(hdev, skb);
1497 break;
1498
1499 case HCI_SCODATA_PKT:
1500 BT_DBG("%s SCO data packet", hdev->name);
1501 hci_scodata_packet(hdev, skb);
1502 break;
1503
1504 default:
1505 kfree_skb(skb);
1506 break;
1507 }
1508 }
1509
1510 read_unlock(&hci_task_lock);
1511 }
1512
1513 static void hci_cmd_task(unsigned long arg)
1514 {
1515 struct hci_dev *hdev = (struct hci_dev *) arg;
1516 struct sk_buff *skb;
1517
1518 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
1519
1520 if (!atomic_read(&hdev->cmd_cnt) && (jiffies - hdev->cmd_last_tx) > HZ) {
1521 BT_ERR("%s command tx timeout", hdev->name);
1522 atomic_set(&hdev->cmd_cnt, 1);
1523 }
1524
1525 /* Send queued commands */
1526 if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) {
1527 if (hdev->sent_cmd)
1528 kfree_skb(hdev->sent_cmd);
1529
1530 if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) {
1531 atomic_dec(&hdev->cmd_cnt);
1532 hci_send_frame(skb);
1533 hdev->cmd_last_tx = jiffies;
1534 } else {
1535 skb_queue_head(&hdev->cmd_q, skb);
1536 hci_sched_cmd(hdev);
1537 }
1538 }
1539 }
x86 "subsystem" repository