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Merge branch 'for-linus' of git://github.com/dtor/input
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
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/jiffies.h>
28 #include <linux/module.h>
29 #include <linux/kmod.h>
30
31 #include <linux/types.h>
32 #include <linux/errno.h>
33 #include <linux/kernel.h>
34 #include <linux/sched.h>
35 #include <linux/slab.h>
36 #include <linux/poll.h>
37 #include <linux/fcntl.h>
38 #include <linux/init.h>
39 #include <linux/skbuff.h>
40 #include <linux/workqueue.h>
41 #include <linux/interrupt.h>
42 #include <linux/notifier.h>
43 #include <linux/rfkill.h>
44 #include <linux/timer.h>
45 #include <linux/crypto.h>
46 #include <net/sock.h>
47
48 #include <asm/system.h>
49 #include <linux/uaccess.h>
50 #include <asm/unaligned.h>
51
52 #include <net/bluetooth/bluetooth.h>
53 #include <net/bluetooth/hci_core.h>
54
55 #define AUTO_OFF_TIMEOUT 2000
56
57 static void hci_cmd_task(unsigned long arg);
58 static void hci_rx_task(unsigned long arg);
59 static void hci_tx_task(unsigned long arg);
60
61 static DEFINE_RWLOCK(hci_task_lock);
62
63 /* HCI device list */
64 LIST_HEAD(hci_dev_list);
65 DEFINE_RWLOCK(hci_dev_list_lock);
66
67 /* HCI callback list */
68 LIST_HEAD(hci_cb_list);
69 DEFINE_RWLOCK(hci_cb_list_lock);
70
71 /* HCI protocols */
72 #define HCI_MAX_PROTO 2
73 struct hci_proto *hci_proto[HCI_MAX_PROTO];
74
75 /* HCI notifiers list */
76 static ATOMIC_NOTIFIER_HEAD(hci_notifier);
77
78 /* ---- HCI notifications ---- */
79
80 int hci_register_notifier(struct notifier_block *nb)
81 {
82 return atomic_notifier_chain_register(&hci_notifier, nb);
83 }
84
85 int hci_unregister_notifier(struct notifier_block *nb)
86 {
87 return atomic_notifier_chain_unregister(&hci_notifier, nb);
88 }
89
90 static void hci_notify(struct hci_dev *hdev, int event)
91 {
92 atomic_notifier_call_chain(&hci_notifier, event, hdev);
93 }
94
95 /* ---- HCI requests ---- */
96
97 void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
98 {
99 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
100
101 /* If this is the init phase check if the completed command matches
102 * the last init command, and if not just return.
103 */
104 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
105 return;
106
107 if (hdev->req_status == HCI_REQ_PEND) {
108 hdev->req_result = result;
109 hdev->req_status = HCI_REQ_DONE;
110 wake_up_interruptible(&hdev->req_wait_q);
111 }
112 }
113
114 static void hci_req_cancel(struct hci_dev *hdev, int err)
115 {
116 BT_DBG("%s err 0x%2.2x", hdev->name, err);
117
118 if (hdev->req_status == HCI_REQ_PEND) {
119 hdev->req_result = err;
120 hdev->req_status = HCI_REQ_CANCELED;
121 wake_up_interruptible(&hdev->req_wait_q);
122 }
123 }
124
125 /* Execute request and wait for completion. */
126 static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
127 unsigned long opt, __u32 timeout)
128 {
129 DECLARE_WAITQUEUE(wait, current);
130 int err = 0;
131
132 BT_DBG("%s start", hdev->name);
133
134 hdev->req_status = HCI_REQ_PEND;
135
136 add_wait_queue(&hdev->req_wait_q, &wait);
137 set_current_state(TASK_INTERRUPTIBLE);
138
139 req(hdev, opt);
140 schedule_timeout(timeout);
141
142 remove_wait_queue(&hdev->req_wait_q, &wait);
143
144 if (signal_pending(current))
145 return -EINTR;
146
147 switch (hdev->req_status) {
148 case HCI_REQ_DONE:
149 err = -bt_to_errno(hdev->req_result);
150 break;
151
152 case HCI_REQ_CANCELED:
153 err = -hdev->req_result;
154 break;
155
156 default:
157 err = -ETIMEDOUT;
158 break;
159 }
160
161 hdev->req_status = hdev->req_result = 0;
162
163 BT_DBG("%s end: err %d", hdev->name, err);
164
165 return err;
166 }
167
168 static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
169 unsigned long opt, __u32 timeout)
170 {
171 int ret;
172
173 if (!test_bit(HCI_UP, &hdev->flags))
174 return -ENETDOWN;
175
176 /* Serialize all requests */
177 hci_req_lock(hdev);
178 ret = __hci_request(hdev, req, opt, timeout);
179 hci_req_unlock(hdev);
180
181 return ret;
182 }
183
184 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
185 {
186 BT_DBG("%s %ld", hdev->name, opt);
187
188 /* Reset device */
189 set_bit(HCI_RESET, &hdev->flags);
190 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
191 }
192
193 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
194 {
195 struct hci_cp_delete_stored_link_key cp;
196 struct sk_buff *skb;
197 __le16 param;
198 __u8 flt_type;
199
200 BT_DBG("%s %ld", hdev->name, opt);
201
202 /* Driver initialization */
203
204 /* Special commands */
205 while ((skb = skb_dequeue(&hdev->driver_init))) {
206 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
207 skb->dev = (void *) hdev;
208
209 skb_queue_tail(&hdev->cmd_q, skb);
210 tasklet_schedule(&hdev->cmd_task);
211 }
212 skb_queue_purge(&hdev->driver_init);
213
214 /* Mandatory initialization */
215
216 /* Reset */
217 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
218 set_bit(HCI_RESET, &hdev->flags);
219 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
220 }
221
222 /* Read Local Supported Features */
223 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
224
225 /* Read Local Version */
226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
227
228 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
229 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
230
231 #if 0
232 /* Host buffer size */
233 {
234 struct hci_cp_host_buffer_size cp;
235 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
236 cp.sco_mtu = HCI_MAX_SCO_SIZE;
237 cp.acl_max_pkt = cpu_to_le16(0xffff);
238 cp.sco_max_pkt = cpu_to_le16(0xffff);
239 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
240 }
241 #endif
242
243 /* Read BD Address */
244 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
245
246 /* Read Class of Device */
247 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
248
249 /* Read Local Name */
250 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
251
252 /* Read Voice Setting */
253 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
254
255 /* Optional initialization */
256
257 /* Clear Event Filters */
258 flt_type = HCI_FLT_CLEAR_ALL;
259 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
260
261 /* Connection accept timeout ~20 secs */
262 param = cpu_to_le16(0x7d00);
263 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
264
265 bacpy(&cp.bdaddr, BDADDR_ANY);
266 cp.delete_all = 1;
267 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
268 }
269
270 static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
271 {
272 BT_DBG("%s", hdev->name);
273
274 /* Read LE buffer size */
275 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
276 }
277
278 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
279 {
280 __u8 scan = opt;
281
282 BT_DBG("%s %x", hdev->name, scan);
283
284 /* Inquiry and Page scans */
285 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
286 }
287
288 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
289 {
290 __u8 auth = opt;
291
292 BT_DBG("%s %x", hdev->name, auth);
293
294 /* Authentication */
295 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
296 }
297
298 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
299 {
300 __u8 encrypt = opt;
301
302 BT_DBG("%s %x", hdev->name, encrypt);
303
304 /* Encryption */
305 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
306 }
307
308 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
309 {
310 __le16 policy = cpu_to_le16(opt);
311
312 BT_DBG("%s %x", hdev->name, policy);
313
314 /* Default link policy */
315 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
316 }
317
318 /* Get HCI device by index.
319 * Device is held on return. */
320 struct hci_dev *hci_dev_get(int index)
321 {
322 struct hci_dev *hdev = NULL;
323 struct list_head *p;
324
325 BT_DBG("%d", index);
326
327 if (index < 0)
328 return NULL;
329
330 read_lock(&hci_dev_list_lock);
331 list_for_each(p, &hci_dev_list) {
332 struct hci_dev *d = list_entry(p, struct hci_dev, list);
333 if (d->id == index) {
334 hdev = hci_dev_hold(d);
335 break;
336 }
337 }
338 read_unlock(&hci_dev_list_lock);
339 return hdev;
340 }
341
342 /* ---- Inquiry support ---- */
343 static void inquiry_cache_flush(struct hci_dev *hdev)
344 {
345 struct inquiry_cache *cache = &hdev->inq_cache;
346 struct inquiry_entry *next = cache->list, *e;
347
348 BT_DBG("cache %p", cache);
349
350 cache->list = NULL;
351 while ((e = next)) {
352 next = e->next;
353 kfree(e);
354 }
355 }
356
357 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
358 {
359 struct inquiry_cache *cache = &hdev->inq_cache;
360 struct inquiry_entry *e;
361
362 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
363
364 for (e = cache->list; e; e = e->next)
365 if (!bacmp(&e->data.bdaddr, bdaddr))
366 break;
367 return e;
368 }
369
370 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
371 {
372 struct inquiry_cache *cache = &hdev->inq_cache;
373 struct inquiry_entry *ie;
374
375 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
376
377 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
378 if (!ie) {
379 /* Entry not in the cache. Add new one. */
380 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
381 if (!ie)
382 return;
383
384 ie->next = cache->list;
385 cache->list = ie;
386 }
387
388 memcpy(&ie->data, data, sizeof(*data));
389 ie->timestamp = jiffies;
390 cache->timestamp = jiffies;
391 }
392
393 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
394 {
395 struct inquiry_cache *cache = &hdev->inq_cache;
396 struct inquiry_info *info = (struct inquiry_info *) buf;
397 struct inquiry_entry *e;
398 int copied = 0;
399
400 for (e = cache->list; e && copied < num; e = e->next, copied++) {
401 struct inquiry_data *data = &e->data;
402 bacpy(&info->bdaddr, &data->bdaddr);
403 info->pscan_rep_mode = data->pscan_rep_mode;
404 info->pscan_period_mode = data->pscan_period_mode;
405 info->pscan_mode = data->pscan_mode;
406 memcpy(info->dev_class, data->dev_class, 3);
407 info->clock_offset = data->clock_offset;
408 info++;
409 }
410
411 BT_DBG("cache %p, copied %d", cache, copied);
412 return copied;
413 }
414
415 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
416 {
417 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
418 struct hci_cp_inquiry cp;
419
420 BT_DBG("%s", hdev->name);
421
422 if (test_bit(HCI_INQUIRY, &hdev->flags))
423 return;
424
425 /* Start Inquiry */
426 memcpy(&cp.lap, &ir->lap, 3);
427 cp.length = ir->length;
428 cp.num_rsp = ir->num_rsp;
429 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
430 }
431
432 int hci_inquiry(void __user *arg)
433 {
434 __u8 __user *ptr = arg;
435 struct hci_inquiry_req ir;
436 struct hci_dev *hdev;
437 int err = 0, do_inquiry = 0, max_rsp;
438 long timeo;
439 __u8 *buf;
440
441 if (copy_from_user(&ir, ptr, sizeof(ir)))
442 return -EFAULT;
443
444 hdev = hci_dev_get(ir.dev_id);
445 if (!hdev)
446 return -ENODEV;
447
448 hci_dev_lock_bh(hdev);
449 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
450 inquiry_cache_empty(hdev) ||
451 ir.flags & IREQ_CACHE_FLUSH) {
452 inquiry_cache_flush(hdev);
453 do_inquiry = 1;
454 }
455 hci_dev_unlock_bh(hdev);
456
457 timeo = ir.length * msecs_to_jiffies(2000);
458
459 if (do_inquiry) {
460 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
461 if (err < 0)
462 goto done;
463 }
464
465 /* for unlimited number of responses we will use buffer with 255 entries */
466 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
467
468 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
469 * copy it to the user space.
470 */
471 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
472 if (!buf) {
473 err = -ENOMEM;
474 goto done;
475 }
476
477 hci_dev_lock_bh(hdev);
478 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
479 hci_dev_unlock_bh(hdev);
480
481 BT_DBG("num_rsp %d", ir.num_rsp);
482
483 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
484 ptr += sizeof(ir);
485 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
486 ir.num_rsp))
487 err = -EFAULT;
488 } else
489 err = -EFAULT;
490
491 kfree(buf);
492
493 done:
494 hci_dev_put(hdev);
495 return err;
496 }
497
498 /* ---- HCI ioctl helpers ---- */
499
500 int hci_dev_open(__u16 dev)
501 {
502 struct hci_dev *hdev;
503 int ret = 0;
504
505 hdev = hci_dev_get(dev);
506 if (!hdev)
507 return -ENODEV;
508
509 BT_DBG("%s %p", hdev->name, hdev);
510
511 hci_req_lock(hdev);
512
513 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
514 ret = -ERFKILL;
515 goto done;
516 }
517
518 if (test_bit(HCI_UP, &hdev->flags)) {
519 ret = -EALREADY;
520 goto done;
521 }
522
523 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
524 set_bit(HCI_RAW, &hdev->flags);
525
526 /* Treat all non BR/EDR controllers as raw devices for now */
527 if (hdev->dev_type != HCI_BREDR)
528 set_bit(HCI_RAW, &hdev->flags);
529
530 if (hdev->open(hdev)) {
531 ret = -EIO;
532 goto done;
533 }
534
535 if (!test_bit(HCI_RAW, &hdev->flags)) {
536 atomic_set(&hdev->cmd_cnt, 1);
537 set_bit(HCI_INIT, &hdev->flags);
538 hdev->init_last_cmd = 0;
539
540 ret = __hci_request(hdev, hci_init_req, 0,
541 msecs_to_jiffies(HCI_INIT_TIMEOUT));
542
543 if (lmp_host_le_capable(hdev))
544 ret = __hci_request(hdev, hci_le_init_req, 0,
545 msecs_to_jiffies(HCI_INIT_TIMEOUT));
546
547 clear_bit(HCI_INIT, &hdev->flags);
548 }
549
550 if (!ret) {
551 hci_dev_hold(hdev);
552 set_bit(HCI_UP, &hdev->flags);
553 hci_notify(hdev, HCI_DEV_UP);
554 if (!test_bit(HCI_SETUP, &hdev->flags))
555 mgmt_powered(hdev->id, 1);
556 } else {
557 /* Init failed, cleanup */
558 tasklet_kill(&hdev->rx_task);
559 tasklet_kill(&hdev->tx_task);
560 tasklet_kill(&hdev->cmd_task);
561
562 skb_queue_purge(&hdev->cmd_q);
563 skb_queue_purge(&hdev->rx_q);
564
565 if (hdev->flush)
566 hdev->flush(hdev);
567
568 if (hdev->sent_cmd) {
569 kfree_skb(hdev->sent_cmd);
570 hdev->sent_cmd = NULL;
571 }
572
573 hdev->close(hdev);
574 hdev->flags = 0;
575 }
576
577 done:
578 hci_req_unlock(hdev);
579 hci_dev_put(hdev);
580 return ret;
581 }
582
583 static int hci_dev_do_close(struct hci_dev *hdev)
584 {
585 BT_DBG("%s %p", hdev->name, hdev);
586
587 hci_req_cancel(hdev, ENODEV);
588 hci_req_lock(hdev);
589
590 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
591 del_timer_sync(&hdev->cmd_timer);
592 hci_req_unlock(hdev);
593 return 0;
594 }
595
596 /* Kill RX and TX tasks */
597 tasklet_kill(&hdev->rx_task);
598 tasklet_kill(&hdev->tx_task);
599
600 hci_dev_lock_bh(hdev);
601 inquiry_cache_flush(hdev);
602 hci_conn_hash_flush(hdev);
603 hci_dev_unlock_bh(hdev);
604
605 hci_notify(hdev, HCI_DEV_DOWN);
606
607 if (hdev->flush)
608 hdev->flush(hdev);
609
610 /* Reset device */
611 skb_queue_purge(&hdev->cmd_q);
612 atomic_set(&hdev->cmd_cnt, 1);
613 if (!test_bit(HCI_RAW, &hdev->flags)) {
614 set_bit(HCI_INIT, &hdev->flags);
615 __hci_request(hdev, hci_reset_req, 0,
616 msecs_to_jiffies(250));
617 clear_bit(HCI_INIT, &hdev->flags);
618 }
619
620 /* Kill cmd task */
621 tasklet_kill(&hdev->cmd_task);
622
623 /* Drop queues */
624 skb_queue_purge(&hdev->rx_q);
625 skb_queue_purge(&hdev->cmd_q);
626 skb_queue_purge(&hdev->raw_q);
627
628 /* Drop last sent command */
629 if (hdev->sent_cmd) {
630 del_timer_sync(&hdev->cmd_timer);
631 kfree_skb(hdev->sent_cmd);
632 hdev->sent_cmd = NULL;
633 }
634
635 /* After this point our queues are empty
636 * and no tasks are scheduled. */
637 hdev->close(hdev);
638
639 mgmt_powered(hdev->id, 0);
640
641 /* Clear flags */
642 hdev->flags = 0;
643
644 hci_req_unlock(hdev);
645
646 hci_dev_put(hdev);
647 return 0;
648 }
649
650 int hci_dev_close(__u16 dev)
651 {
652 struct hci_dev *hdev;
653 int err;
654
655 hdev = hci_dev_get(dev);
656 if (!hdev)
657 return -ENODEV;
658 err = hci_dev_do_close(hdev);
659 hci_dev_put(hdev);
660 return err;
661 }
662
663 int hci_dev_reset(__u16 dev)
664 {
665 struct hci_dev *hdev;
666 int ret = 0;
667
668 hdev = hci_dev_get(dev);
669 if (!hdev)
670 return -ENODEV;
671
672 hci_req_lock(hdev);
673 tasklet_disable(&hdev->tx_task);
674
675 if (!test_bit(HCI_UP, &hdev->flags))
676 goto done;
677
678 /* Drop queues */
679 skb_queue_purge(&hdev->rx_q);
680 skb_queue_purge(&hdev->cmd_q);
681
682 hci_dev_lock_bh(hdev);
683 inquiry_cache_flush(hdev);
684 hci_conn_hash_flush(hdev);
685 hci_dev_unlock_bh(hdev);
686
687 if (hdev->flush)
688 hdev->flush(hdev);
689
690 atomic_set(&hdev->cmd_cnt, 1);
691 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
692
693 if (!test_bit(HCI_RAW, &hdev->flags))
694 ret = __hci_request(hdev, hci_reset_req, 0,
695 msecs_to_jiffies(HCI_INIT_TIMEOUT));
696
697 done:
698 tasklet_enable(&hdev->tx_task);
699 hci_req_unlock(hdev);
700 hci_dev_put(hdev);
701 return ret;
702 }
703
704 int hci_dev_reset_stat(__u16 dev)
705 {
706 struct hci_dev *hdev;
707 int ret = 0;
708
709 hdev = hci_dev_get(dev);
710 if (!hdev)
711 return -ENODEV;
712
713 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
714
715 hci_dev_put(hdev);
716
717 return ret;
718 }
719
720 int hci_dev_cmd(unsigned int cmd, void __user *arg)
721 {
722 struct hci_dev *hdev;
723 struct hci_dev_req dr;
724 int err = 0;
725
726 if (copy_from_user(&dr, arg, sizeof(dr)))
727 return -EFAULT;
728
729 hdev = hci_dev_get(dr.dev_id);
730 if (!hdev)
731 return -ENODEV;
732
733 switch (cmd) {
734 case HCISETAUTH:
735 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
736 msecs_to_jiffies(HCI_INIT_TIMEOUT));
737 break;
738
739 case HCISETENCRYPT:
740 if (!lmp_encrypt_capable(hdev)) {
741 err = -EOPNOTSUPP;
742 break;
743 }
744
745 if (!test_bit(HCI_AUTH, &hdev->flags)) {
746 /* Auth must be enabled first */
747 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
748 msecs_to_jiffies(HCI_INIT_TIMEOUT));
749 if (err)
750 break;
751 }
752
753 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
754 msecs_to_jiffies(HCI_INIT_TIMEOUT));
755 break;
756
757 case HCISETSCAN:
758 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
759 msecs_to_jiffies(HCI_INIT_TIMEOUT));
760 break;
761
762 case HCISETLINKPOL:
763 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
764 msecs_to_jiffies(HCI_INIT_TIMEOUT));
765 break;
766
767 case HCISETLINKMODE:
768 hdev->link_mode = ((__u16) dr.dev_opt) &
769 (HCI_LM_MASTER | HCI_LM_ACCEPT);
770 break;
771
772 case HCISETPTYPE:
773 hdev->pkt_type = (__u16) dr.dev_opt;
774 break;
775
776 case HCISETACLMTU:
777 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
778 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
779 break;
780
781 case HCISETSCOMTU:
782 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
783 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
784 break;
785
786 default:
787 err = -EINVAL;
788 break;
789 }
790
791 hci_dev_put(hdev);
792 return err;
793 }
794
795 int hci_get_dev_list(void __user *arg)
796 {
797 struct hci_dev_list_req *dl;
798 struct hci_dev_req *dr;
799 struct list_head *p;
800 int n = 0, size, err;
801 __u16 dev_num;
802
803 if (get_user(dev_num, (__u16 __user *) arg))
804 return -EFAULT;
805
806 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
807 return -EINVAL;
808
809 size = sizeof(*dl) + dev_num * sizeof(*dr);
810
811 dl = kzalloc(size, GFP_KERNEL);
812 if (!dl)
813 return -ENOMEM;
814
815 dr = dl->dev_req;
816
817 read_lock_bh(&hci_dev_list_lock);
818 list_for_each(p, &hci_dev_list) {
819 struct hci_dev *hdev;
820
821 hdev = list_entry(p, struct hci_dev, list);
822
823 hci_del_off_timer(hdev);
824
825 if (!test_bit(HCI_MGMT, &hdev->flags))
826 set_bit(HCI_PAIRABLE, &hdev->flags);
827
828 (dr + n)->dev_id = hdev->id;
829 (dr + n)->dev_opt = hdev->flags;
830
831 if (++n >= dev_num)
832 break;
833 }
834 read_unlock_bh(&hci_dev_list_lock);
835
836 dl->dev_num = n;
837 size = sizeof(*dl) + n * sizeof(*dr);
838
839 err = copy_to_user(arg, dl, size);
840 kfree(dl);
841
842 return err ? -EFAULT : 0;
843 }
844
845 int hci_get_dev_info(void __user *arg)
846 {
847 struct hci_dev *hdev;
848 struct hci_dev_info di;
849 int err = 0;
850
851 if (copy_from_user(&di, arg, sizeof(di)))
852 return -EFAULT;
853
854 hdev = hci_dev_get(di.dev_id);
855 if (!hdev)
856 return -ENODEV;
857
858 hci_del_off_timer(hdev);
859
860 if (!test_bit(HCI_MGMT, &hdev->flags))
861 set_bit(HCI_PAIRABLE, &hdev->flags);
862
863 strcpy(di.name, hdev->name);
864 di.bdaddr = hdev->bdaddr;
865 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
866 di.flags = hdev->flags;
867 di.pkt_type = hdev->pkt_type;
868 di.acl_mtu = hdev->acl_mtu;
869 di.acl_pkts = hdev->acl_pkts;
870 di.sco_mtu = hdev->sco_mtu;
871 di.sco_pkts = hdev->sco_pkts;
872 di.link_policy = hdev->link_policy;
873 di.link_mode = hdev->link_mode;
874
875 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
876 memcpy(&di.features, &hdev->features, sizeof(di.features));
877
878 if (copy_to_user(arg, &di, sizeof(di)))
879 err = -EFAULT;
880
881 hci_dev_put(hdev);
882
883 return err;
884 }
885
886 /* ---- Interface to HCI drivers ---- */
887
888 static int hci_rfkill_set_block(void *data, bool blocked)
889 {
890 struct hci_dev *hdev = data;
891
892 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
893
894 if (!blocked)
895 return 0;
896
897 hci_dev_do_close(hdev);
898
899 return 0;
900 }
901
902 static const struct rfkill_ops hci_rfkill_ops = {
903 .set_block = hci_rfkill_set_block,
904 };
905
906 /* Alloc HCI device */
907 struct hci_dev *hci_alloc_dev(void)
908 {
909 struct hci_dev *hdev;
910
911 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
912 if (!hdev)
913 return NULL;
914
915 skb_queue_head_init(&hdev->driver_init);
916
917 return hdev;
918 }
919 EXPORT_SYMBOL(hci_alloc_dev);
920
921 /* Free HCI device */
922 void hci_free_dev(struct hci_dev *hdev)
923 {
924 skb_queue_purge(&hdev->driver_init);
925
926 /* will free via device release */
927 put_device(&hdev->dev);
928 }
929 EXPORT_SYMBOL(hci_free_dev);
930
931 static void hci_power_on(struct work_struct *work)
932 {
933 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
934
935 BT_DBG("%s", hdev->name);
936
937 if (hci_dev_open(hdev->id) < 0)
938 return;
939
940 if (test_bit(HCI_AUTO_OFF, &hdev->flags))
941 mod_timer(&hdev->off_timer,
942 jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT));
943
944 if (test_and_clear_bit(HCI_SETUP, &hdev->flags))
945 mgmt_index_added(hdev->id);
946 }
947
948 static void hci_power_off(struct work_struct *work)
949 {
950 struct hci_dev *hdev = container_of(work, struct hci_dev, power_off);
951
952 BT_DBG("%s", hdev->name);
953
954 hci_dev_close(hdev->id);
955 }
956
957 static void hci_auto_off(unsigned long data)
958 {
959 struct hci_dev *hdev = (struct hci_dev *) data;
960
961 BT_DBG("%s", hdev->name);
962
963 clear_bit(HCI_AUTO_OFF, &hdev->flags);
964
965 queue_work(hdev->workqueue, &hdev->power_off);
966 }
967
968 void hci_del_off_timer(struct hci_dev *hdev)
969 {
970 BT_DBG("%s", hdev->name);
971
972 clear_bit(HCI_AUTO_OFF, &hdev->flags);
973 del_timer(&hdev->off_timer);
974 }
975
976 int hci_uuids_clear(struct hci_dev *hdev)
977 {
978 struct list_head *p, *n;
979
980 list_for_each_safe(p, n, &hdev->uuids) {
981 struct bt_uuid *uuid;
982
983 uuid = list_entry(p, struct bt_uuid, list);
984
985 list_del(p);
986 kfree(uuid);
987 }
988
989 return 0;
990 }
991
992 int hci_link_keys_clear(struct hci_dev *hdev)
993 {
994 struct list_head *p, *n;
995
996 list_for_each_safe(p, n, &hdev->link_keys) {
997 struct link_key *key;
998
999 key = list_entry(p, struct link_key, list);
1000
1001 list_del(p);
1002 kfree(key);
1003 }
1004
1005 return 0;
1006 }
1007
1008 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1009 {
1010 struct list_head *p;
1011
1012 list_for_each(p, &hdev->link_keys) {
1013 struct link_key *k;
1014
1015 k = list_entry(p, struct link_key, list);
1016
1017 if (bacmp(bdaddr, &k->bdaddr) == 0)
1018 return k;
1019 }
1020
1021 return NULL;
1022 }
1023
1024 static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1025 u8 key_type, u8 old_key_type)
1026 {
1027 /* Legacy key */
1028 if (key_type < 0x03)
1029 return 1;
1030
1031 /* Debug keys are insecure so don't store them persistently */
1032 if (key_type == HCI_LK_DEBUG_COMBINATION)
1033 return 0;
1034
1035 /* Changed combination key and there's no previous one */
1036 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1037 return 0;
1038
1039 /* Security mode 3 case */
1040 if (!conn)
1041 return 1;
1042
1043 /* Neither local nor remote side had no-bonding as requirement */
1044 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1045 return 1;
1046
1047 /* Local side had dedicated bonding as requirement */
1048 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1049 return 1;
1050
1051 /* Remote side had dedicated bonding as requirement */
1052 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1053 return 1;
1054
1055 /* If none of the above criteria match, then don't store the key
1056 * persistently */
1057 return 0;
1058 }
1059
1060 struct link_key *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1061 {
1062 struct link_key *k;
1063
1064 list_for_each_entry(k, &hdev->link_keys, list) {
1065 struct key_master_id *id;
1066
1067 if (k->type != HCI_LK_SMP_LTK)
1068 continue;
1069
1070 if (k->dlen != sizeof(*id))
1071 continue;
1072
1073 id = (void *) &k->data;
1074 if (id->ediv == ediv &&
1075 (memcmp(rand, id->rand, sizeof(id->rand)) == 0))
1076 return k;
1077 }
1078
1079 return NULL;
1080 }
1081 EXPORT_SYMBOL(hci_find_ltk);
1082
1083 struct link_key *hci_find_link_key_type(struct hci_dev *hdev,
1084 bdaddr_t *bdaddr, u8 type)
1085 {
1086 struct link_key *k;
1087
1088 list_for_each_entry(k, &hdev->link_keys, list)
1089 if (k->type == type && bacmp(bdaddr, &k->bdaddr) == 0)
1090 return k;
1091
1092 return NULL;
1093 }
1094 EXPORT_SYMBOL(hci_find_link_key_type);
1095
1096 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1097 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1098 {
1099 struct link_key *key, *old_key;
1100 u8 old_key_type, persistent;
1101
1102 old_key = hci_find_link_key(hdev, bdaddr);
1103 if (old_key) {
1104 old_key_type = old_key->type;
1105 key = old_key;
1106 } else {
1107 old_key_type = conn ? conn->key_type : 0xff;
1108 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1109 if (!key)
1110 return -ENOMEM;
1111 list_add(&key->list, &hdev->link_keys);
1112 }
1113
1114 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1115
1116 /* Some buggy controller combinations generate a changed
1117 * combination key for legacy pairing even when there's no
1118 * previous key */
1119 if (type == HCI_LK_CHANGED_COMBINATION &&
1120 (!conn || conn->remote_auth == 0xff) &&
1121 old_key_type == 0xff) {
1122 type = HCI_LK_COMBINATION;
1123 if (conn)
1124 conn->key_type = type;
1125 }
1126
1127 bacpy(&key->bdaddr, bdaddr);
1128 memcpy(key->val, val, 16);
1129 key->pin_len = pin_len;
1130
1131 if (type == HCI_LK_CHANGED_COMBINATION)
1132 key->type = old_key_type;
1133 else
1134 key->type = type;
1135
1136 if (!new_key)
1137 return 0;
1138
1139 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1140
1141 mgmt_new_key(hdev->id, key, persistent);
1142
1143 if (!persistent) {
1144 list_del(&key->list);
1145 kfree(key);
1146 }
1147
1148 return 0;
1149 }
1150
1151 int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
1152 u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16])
1153 {
1154 struct link_key *key, *old_key;
1155 struct key_master_id *id;
1156 u8 old_key_type;
1157
1158 BT_DBG("%s addr %s", hdev->name, batostr(bdaddr));
1159
1160 old_key = hci_find_link_key_type(hdev, bdaddr, HCI_LK_SMP_LTK);
1161 if (old_key) {
1162 key = old_key;
1163 old_key_type = old_key->type;
1164 } else {
1165 key = kzalloc(sizeof(*key) + sizeof(*id), GFP_ATOMIC);
1166 if (!key)
1167 return -ENOMEM;
1168 list_add(&key->list, &hdev->link_keys);
1169 old_key_type = 0xff;
1170 }
1171
1172 key->dlen = sizeof(*id);
1173
1174 bacpy(&key->bdaddr, bdaddr);
1175 memcpy(key->val, ltk, sizeof(key->val));
1176 key->type = HCI_LK_SMP_LTK;
1177 key->pin_len = key_size;
1178
1179 id = (void *) &key->data;
1180 id->ediv = ediv;
1181 memcpy(id->rand, rand, sizeof(id->rand));
1182
1183 if (new_key)
1184 mgmt_new_key(hdev->id, key, old_key_type);
1185
1186 return 0;
1187 }
1188
1189 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1190 {
1191 struct link_key *key;
1192
1193 key = hci_find_link_key(hdev, bdaddr);
1194 if (!key)
1195 return -ENOENT;
1196
1197 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1198
1199 list_del(&key->list);
1200 kfree(key);
1201
1202 return 0;
1203 }
1204
1205 /* HCI command timer function */
1206 static void hci_cmd_timer(unsigned long arg)
1207 {
1208 struct hci_dev *hdev = (void *) arg;
1209
1210 BT_ERR("%s command tx timeout", hdev->name);
1211 atomic_set(&hdev->cmd_cnt, 1);
1212 tasklet_schedule(&hdev->cmd_task);
1213 }
1214
1215 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1216 bdaddr_t *bdaddr)
1217 {
1218 struct oob_data *data;
1219
1220 list_for_each_entry(data, &hdev->remote_oob_data, list)
1221 if (bacmp(bdaddr, &data->bdaddr) == 0)
1222 return data;
1223
1224 return NULL;
1225 }
1226
1227 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1228 {
1229 struct oob_data *data;
1230
1231 data = hci_find_remote_oob_data(hdev, bdaddr);
1232 if (!data)
1233 return -ENOENT;
1234
1235 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1236
1237 list_del(&data->list);
1238 kfree(data);
1239
1240 return 0;
1241 }
1242
1243 int hci_remote_oob_data_clear(struct hci_dev *hdev)
1244 {
1245 struct oob_data *data, *n;
1246
1247 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1248 list_del(&data->list);
1249 kfree(data);
1250 }
1251
1252 return 0;
1253 }
1254
1255 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1256 u8 *randomizer)
1257 {
1258 struct oob_data *data;
1259
1260 data = hci_find_remote_oob_data(hdev, bdaddr);
1261
1262 if (!data) {
1263 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1264 if (!data)
1265 return -ENOMEM;
1266
1267 bacpy(&data->bdaddr, bdaddr);
1268 list_add(&data->list, &hdev->remote_oob_data);
1269 }
1270
1271 memcpy(data->hash, hash, sizeof(data->hash));
1272 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1273
1274 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1275
1276 return 0;
1277 }
1278
1279 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
1280 bdaddr_t *bdaddr)
1281 {
1282 struct list_head *p;
1283
1284 list_for_each(p, &hdev->blacklist) {
1285 struct bdaddr_list *b;
1286
1287 b = list_entry(p, struct bdaddr_list, list);
1288
1289 if (bacmp(bdaddr, &b->bdaddr) == 0)
1290 return b;
1291 }
1292
1293 return NULL;
1294 }
1295
1296 int hci_blacklist_clear(struct hci_dev *hdev)
1297 {
1298 struct list_head *p, *n;
1299
1300 list_for_each_safe(p, n, &hdev->blacklist) {
1301 struct bdaddr_list *b;
1302
1303 b = list_entry(p, struct bdaddr_list, list);
1304
1305 list_del(p);
1306 kfree(b);
1307 }
1308
1309 return 0;
1310 }
1311
1312 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr)
1313 {
1314 struct bdaddr_list *entry;
1315 int err;
1316
1317 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1318 return -EBADF;
1319
1320 hci_dev_lock_bh(hdev);
1321
1322 if (hci_blacklist_lookup(hdev, bdaddr)) {
1323 err = -EEXIST;
1324 goto err;
1325 }
1326
1327 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1328 if (!entry) {
1329 err = -ENOMEM;
1330 goto err;
1331 }
1332
1333 bacpy(&entry->bdaddr, bdaddr);
1334
1335 list_add(&entry->list, &hdev->blacklist);
1336
1337 err = 0;
1338
1339 err:
1340 hci_dev_unlock_bh(hdev);
1341 return err;
1342 }
1343
1344 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr)
1345 {
1346 struct bdaddr_list *entry;
1347 int err = 0;
1348
1349 hci_dev_lock_bh(hdev);
1350
1351 if (bacmp(bdaddr, BDADDR_ANY) == 0) {
1352 hci_blacklist_clear(hdev);
1353 goto done;
1354 }
1355
1356 entry = hci_blacklist_lookup(hdev, bdaddr);
1357 if (!entry) {
1358 err = -ENOENT;
1359 goto done;
1360 }
1361
1362 list_del(&entry->list);
1363 kfree(entry);
1364
1365 done:
1366 hci_dev_unlock_bh(hdev);
1367 return err;
1368 }
1369
1370 static void hci_clear_adv_cache(unsigned long arg)
1371 {
1372 struct hci_dev *hdev = (void *) arg;
1373
1374 hci_dev_lock(hdev);
1375
1376 hci_adv_entries_clear(hdev);
1377
1378 hci_dev_unlock(hdev);
1379 }
1380
1381 int hci_adv_entries_clear(struct hci_dev *hdev)
1382 {
1383 struct adv_entry *entry, *tmp;
1384
1385 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1386 list_del(&entry->list);
1387 kfree(entry);
1388 }
1389
1390 BT_DBG("%s adv cache cleared", hdev->name);
1391
1392 return 0;
1393 }
1394
1395 struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1396 {
1397 struct adv_entry *entry;
1398
1399 list_for_each_entry(entry, &hdev->adv_entries, list)
1400 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1401 return entry;
1402
1403 return NULL;
1404 }
1405
1406 static inline int is_connectable_adv(u8 evt_type)
1407 {
1408 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1409 return 1;
1410
1411 return 0;
1412 }
1413
1414 int hci_add_adv_entry(struct hci_dev *hdev,
1415 struct hci_ev_le_advertising_info *ev)
1416 {
1417 struct adv_entry *entry;
1418
1419 if (!is_connectable_adv(ev->evt_type))
1420 return -EINVAL;
1421
1422 /* Only new entries should be added to adv_entries. So, if
1423 * bdaddr was found, don't add it. */
1424 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1425 return 0;
1426
1427 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
1428 if (!entry)
1429 return -ENOMEM;
1430
1431 bacpy(&entry->bdaddr, &ev->bdaddr);
1432 entry->bdaddr_type = ev->bdaddr_type;
1433
1434 list_add(&entry->list, &hdev->adv_entries);
1435
1436 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1437 batostr(&entry->bdaddr), entry->bdaddr_type);
1438
1439 return 0;
1440 }
1441
1442 /* Register HCI device */
1443 int hci_register_dev(struct hci_dev *hdev)
1444 {
1445 struct list_head *head = &hci_dev_list, *p;
1446 int i, id = 0;
1447
1448 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
1449 hdev->bus, hdev->owner);
1450
1451 if (!hdev->open || !hdev->close || !hdev->destruct)
1452 return -EINVAL;
1453
1454 write_lock_bh(&hci_dev_list_lock);
1455
1456 /* Find first available device id */
1457 list_for_each(p, &hci_dev_list) {
1458 if (list_entry(p, struct hci_dev, list)->id != id)
1459 break;
1460 head = p; id++;
1461 }
1462
1463 sprintf(hdev->name, "hci%d", id);
1464 hdev->id = id;
1465 list_add(&hdev->list, head);
1466
1467 atomic_set(&hdev->refcnt, 1);
1468 spin_lock_init(&hdev->lock);
1469
1470 hdev->flags = 0;
1471 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1472 hdev->esco_type = (ESCO_HV1);
1473 hdev->link_mode = (HCI_LM_ACCEPT);
1474 hdev->io_capability = 0x03; /* No Input No Output */
1475
1476 hdev->idle_timeout = 0;
1477 hdev->sniff_max_interval = 800;
1478 hdev->sniff_min_interval = 80;
1479
1480 tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev);
1481 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
1482 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
1483
1484 skb_queue_head_init(&hdev->rx_q);
1485 skb_queue_head_init(&hdev->cmd_q);
1486 skb_queue_head_init(&hdev->raw_q);
1487
1488 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1489
1490 for (i = 0; i < NUM_REASSEMBLY; i++)
1491 hdev->reassembly[i] = NULL;
1492
1493 init_waitqueue_head(&hdev->req_wait_q);
1494 mutex_init(&hdev->req_lock);
1495
1496 inquiry_cache_init(hdev);
1497
1498 hci_conn_hash_init(hdev);
1499
1500 INIT_LIST_HEAD(&hdev->blacklist);
1501
1502 INIT_LIST_HEAD(&hdev->uuids);
1503
1504 INIT_LIST_HEAD(&hdev->link_keys);
1505
1506 INIT_LIST_HEAD(&hdev->remote_oob_data);
1507
1508 INIT_LIST_HEAD(&hdev->adv_entries);
1509 setup_timer(&hdev->adv_timer, hci_clear_adv_cache,
1510 (unsigned long) hdev);
1511
1512 INIT_WORK(&hdev->power_on, hci_power_on);
1513 INIT_WORK(&hdev->power_off, hci_power_off);
1514 setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev);
1515
1516 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1517
1518 atomic_set(&hdev->promisc, 0);
1519
1520 write_unlock_bh(&hci_dev_list_lock);
1521
1522 hdev->workqueue = create_singlethread_workqueue(hdev->name);
1523 if (!hdev->workqueue)
1524 goto nomem;
1525
1526 hdev->tfm = crypto_alloc_blkcipher("ecb(aes)", 0, CRYPTO_ALG_ASYNC);
1527 if (IS_ERR(hdev->tfm))
1528 BT_INFO("Failed to load transform for ecb(aes): %ld",
1529 PTR_ERR(hdev->tfm));
1530
1531 hci_register_sysfs(hdev);
1532
1533 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1534 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1535 if (hdev->rfkill) {
1536 if (rfkill_register(hdev->rfkill) < 0) {
1537 rfkill_destroy(hdev->rfkill);
1538 hdev->rfkill = NULL;
1539 }
1540 }
1541
1542 set_bit(HCI_AUTO_OFF, &hdev->flags);
1543 set_bit(HCI_SETUP, &hdev->flags);
1544 queue_work(hdev->workqueue, &hdev->power_on);
1545
1546 hci_notify(hdev, HCI_DEV_REG);
1547
1548 return id;
1549
1550 nomem:
1551 write_lock_bh(&hci_dev_list_lock);
1552 list_del(&hdev->list);
1553 write_unlock_bh(&hci_dev_list_lock);
1554
1555 return -ENOMEM;
1556 }
1557 EXPORT_SYMBOL(hci_register_dev);
1558
1559 /* Unregister HCI device */
1560 int hci_unregister_dev(struct hci_dev *hdev)
1561 {
1562 int i;
1563
1564 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1565
1566 write_lock_bh(&hci_dev_list_lock);
1567 list_del(&hdev->list);
1568 write_unlock_bh(&hci_dev_list_lock);
1569
1570 hci_dev_do_close(hdev);
1571
1572 for (i = 0; i < NUM_REASSEMBLY; i++)
1573 kfree_skb(hdev->reassembly[i]);
1574
1575 if (!test_bit(HCI_INIT, &hdev->flags) &&
1576 !test_bit(HCI_SETUP, &hdev->flags))
1577 mgmt_index_removed(hdev->id);
1578
1579 if (!IS_ERR(hdev->tfm))
1580 crypto_free_blkcipher(hdev->tfm);
1581
1582 hci_notify(hdev, HCI_DEV_UNREG);
1583
1584 if (hdev->rfkill) {
1585 rfkill_unregister(hdev->rfkill);
1586 rfkill_destroy(hdev->rfkill);
1587 }
1588
1589 hci_unregister_sysfs(hdev);
1590
1591 hci_del_off_timer(hdev);
1592 del_timer(&hdev->adv_timer);
1593
1594 destroy_workqueue(hdev->workqueue);
1595
1596 hci_dev_lock_bh(hdev);
1597 hci_blacklist_clear(hdev);
1598 hci_uuids_clear(hdev);
1599 hci_link_keys_clear(hdev);
1600 hci_remote_oob_data_clear(hdev);
1601 hci_adv_entries_clear(hdev);
1602 hci_dev_unlock_bh(hdev);
1603
1604 __hci_dev_put(hdev);
1605
1606 return 0;
1607 }
1608 EXPORT_SYMBOL(hci_unregister_dev);
1609
1610 /* Suspend HCI device */
1611 int hci_suspend_dev(struct hci_dev *hdev)
1612 {
1613 hci_notify(hdev, HCI_DEV_SUSPEND);
1614 return 0;
1615 }
1616 EXPORT_SYMBOL(hci_suspend_dev);
1617
1618 /* Resume HCI device */
1619 int hci_resume_dev(struct hci_dev *hdev)
1620 {
1621 hci_notify(hdev, HCI_DEV_RESUME);
1622 return 0;
1623 }
1624 EXPORT_SYMBOL(hci_resume_dev);
1625
1626 /* Receive frame from HCI drivers */
1627 int hci_recv_frame(struct sk_buff *skb)
1628 {
1629 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1630 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1631 && !test_bit(HCI_INIT, &hdev->flags))) {
1632 kfree_skb(skb);
1633 return -ENXIO;
1634 }
1635
1636 /* Incomming skb */
1637 bt_cb(skb)->incoming = 1;
1638
1639 /* Time stamp */
1640 __net_timestamp(skb);
1641
1642 /* Queue frame for rx task */
1643 skb_queue_tail(&hdev->rx_q, skb);
1644 tasklet_schedule(&hdev->rx_task);
1645
1646 return 0;
1647 }
1648 EXPORT_SYMBOL(hci_recv_frame);
1649
1650 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1651 int count, __u8 index)
1652 {
1653 int len = 0;
1654 int hlen = 0;
1655 int remain = count;
1656 struct sk_buff *skb;
1657 struct bt_skb_cb *scb;
1658
1659 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1660 index >= NUM_REASSEMBLY)
1661 return -EILSEQ;
1662
1663 skb = hdev->reassembly[index];
1664
1665 if (!skb) {
1666 switch (type) {
1667 case HCI_ACLDATA_PKT:
1668 len = HCI_MAX_FRAME_SIZE;
1669 hlen = HCI_ACL_HDR_SIZE;
1670 break;
1671 case HCI_EVENT_PKT:
1672 len = HCI_MAX_EVENT_SIZE;
1673 hlen = HCI_EVENT_HDR_SIZE;
1674 break;
1675 case HCI_SCODATA_PKT:
1676 len = HCI_MAX_SCO_SIZE;
1677 hlen = HCI_SCO_HDR_SIZE;
1678 break;
1679 }
1680
1681 skb = bt_skb_alloc(len, GFP_ATOMIC);
1682 if (!skb)
1683 return -ENOMEM;
1684
1685 scb = (void *) skb->cb;
1686 scb->expect = hlen;
1687 scb->pkt_type = type;
1688
1689 skb->dev = (void *) hdev;
1690 hdev->reassembly[index] = skb;
1691 }
1692
1693 while (count) {
1694 scb = (void *) skb->cb;
1695 len = min(scb->expect, (__u16)count);
1696
1697 memcpy(skb_put(skb, len), data, len);
1698
1699 count -= len;
1700 data += len;
1701 scb->expect -= len;
1702 remain = count;
1703
1704 switch (type) {
1705 case HCI_EVENT_PKT:
1706 if (skb->len == HCI_EVENT_HDR_SIZE) {
1707 struct hci_event_hdr *h = hci_event_hdr(skb);
1708 scb->expect = h->plen;
1709
1710 if (skb_tailroom(skb) < scb->expect) {
1711 kfree_skb(skb);
1712 hdev->reassembly[index] = NULL;
1713 return -ENOMEM;
1714 }
1715 }
1716 break;
1717
1718 case HCI_ACLDATA_PKT:
1719 if (skb->len == HCI_ACL_HDR_SIZE) {
1720 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1721 scb->expect = __le16_to_cpu(h->dlen);
1722
1723 if (skb_tailroom(skb) < scb->expect) {
1724 kfree_skb(skb);
1725 hdev->reassembly[index] = NULL;
1726 return -ENOMEM;
1727 }
1728 }
1729 break;
1730
1731 case HCI_SCODATA_PKT:
1732 if (skb->len == HCI_SCO_HDR_SIZE) {
1733 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1734 scb->expect = h->dlen;
1735
1736 if (skb_tailroom(skb) < scb->expect) {
1737 kfree_skb(skb);
1738 hdev->reassembly[index] = NULL;
1739 return -ENOMEM;
1740 }
1741 }
1742 break;
1743 }
1744
1745 if (scb->expect == 0) {
1746 /* Complete frame */
1747
1748 bt_cb(skb)->pkt_type = type;
1749 hci_recv_frame(skb);
1750
1751 hdev->reassembly[index] = NULL;
1752 return remain;
1753 }
1754 }
1755
1756 return remain;
1757 }
1758
1759 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1760 {
1761 int rem = 0;
1762
1763 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1764 return -EILSEQ;
1765
1766 while (count) {
1767 rem = hci_reassembly(hdev, type, data, count, type - 1);
1768 if (rem < 0)
1769 return rem;
1770
1771 data += (count - rem);
1772 count = rem;
1773 }
1774
1775 return rem;
1776 }
1777 EXPORT_SYMBOL(hci_recv_fragment);
1778
1779 #define STREAM_REASSEMBLY 0
1780
1781 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1782 {
1783 int type;
1784 int rem = 0;
1785
1786 while (count) {
1787 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1788
1789 if (!skb) {
1790 struct { char type; } *pkt;
1791
1792 /* Start of the frame */
1793 pkt = data;
1794 type = pkt->type;
1795
1796 data++;
1797 count--;
1798 } else
1799 type = bt_cb(skb)->pkt_type;
1800
1801 rem = hci_reassembly(hdev, type, data, count,
1802 STREAM_REASSEMBLY);
1803 if (rem < 0)
1804 return rem;
1805
1806 data += (count - rem);
1807 count = rem;
1808 }
1809
1810 return rem;
1811 }
1812 EXPORT_SYMBOL(hci_recv_stream_fragment);
1813
1814 /* ---- Interface to upper protocols ---- */
1815
1816 /* Register/Unregister protocols.
1817 * hci_task_lock is used to ensure that no tasks are running. */
1818 int hci_register_proto(struct hci_proto *hp)
1819 {
1820 int err = 0;
1821
1822 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1823
1824 if (hp->id >= HCI_MAX_PROTO)
1825 return -EINVAL;
1826
1827 write_lock_bh(&hci_task_lock);
1828
1829 if (!hci_proto[hp->id])
1830 hci_proto[hp->id] = hp;
1831 else
1832 err = -EEXIST;
1833
1834 write_unlock_bh(&hci_task_lock);
1835
1836 return err;
1837 }
1838 EXPORT_SYMBOL(hci_register_proto);
1839
1840 int hci_unregister_proto(struct hci_proto *hp)
1841 {
1842 int err = 0;
1843
1844 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1845
1846 if (hp->id >= HCI_MAX_PROTO)
1847 return -EINVAL;
1848
1849 write_lock_bh(&hci_task_lock);
1850
1851 if (hci_proto[hp->id])
1852 hci_proto[hp->id] = NULL;
1853 else
1854 err = -ENOENT;
1855
1856 write_unlock_bh(&hci_task_lock);
1857
1858 return err;
1859 }
1860 EXPORT_SYMBOL(hci_unregister_proto);
1861
1862 int hci_register_cb(struct hci_cb *cb)
1863 {
1864 BT_DBG("%p name %s", cb, cb->name);
1865
1866 write_lock_bh(&hci_cb_list_lock);
1867 list_add(&cb->list, &hci_cb_list);
1868 write_unlock_bh(&hci_cb_list_lock);
1869
1870 return 0;
1871 }
1872 EXPORT_SYMBOL(hci_register_cb);
1873
1874 int hci_unregister_cb(struct hci_cb *cb)
1875 {
1876 BT_DBG("%p name %s", cb, cb->name);
1877
1878 write_lock_bh(&hci_cb_list_lock);
1879 list_del(&cb->list);
1880 write_unlock_bh(&hci_cb_list_lock);
1881
1882 return 0;
1883 }
1884 EXPORT_SYMBOL(hci_unregister_cb);
1885
1886 static int hci_send_frame(struct sk_buff *skb)
1887 {
1888 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1889
1890 if (!hdev) {
1891 kfree_skb(skb);
1892 return -ENODEV;
1893 }
1894
1895 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1896
1897 if (atomic_read(&hdev->promisc)) {
1898 /* Time stamp */
1899 __net_timestamp(skb);
1900
1901 hci_send_to_sock(hdev, skb, NULL);
1902 }
1903
1904 /* Get rid of skb owner, prior to sending to the driver. */
1905 skb_orphan(skb);
1906
1907 return hdev->send(skb);
1908 }
1909
1910 /* Send HCI command */
1911 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1912 {
1913 int len = HCI_COMMAND_HDR_SIZE + plen;
1914 struct hci_command_hdr *hdr;
1915 struct sk_buff *skb;
1916
1917 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1918
1919 skb = bt_skb_alloc(len, GFP_ATOMIC);
1920 if (!skb) {
1921 BT_ERR("%s no memory for command", hdev->name);
1922 return -ENOMEM;
1923 }
1924
1925 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
1926 hdr->opcode = cpu_to_le16(opcode);
1927 hdr->plen = plen;
1928
1929 if (plen)
1930 memcpy(skb_put(skb, plen), param, plen);
1931
1932 BT_DBG("skb len %d", skb->len);
1933
1934 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1935 skb->dev = (void *) hdev;
1936
1937 if (test_bit(HCI_INIT, &hdev->flags))
1938 hdev->init_last_cmd = opcode;
1939
1940 skb_queue_tail(&hdev->cmd_q, skb);
1941 tasklet_schedule(&hdev->cmd_task);
1942
1943 return 0;
1944 }
1945
1946 /* Get data from the previously sent command */
1947 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1948 {
1949 struct hci_command_hdr *hdr;
1950
1951 if (!hdev->sent_cmd)
1952 return NULL;
1953
1954 hdr = (void *) hdev->sent_cmd->data;
1955
1956 if (hdr->opcode != cpu_to_le16(opcode))
1957 return NULL;
1958
1959 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1960
1961 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1962 }
1963
1964 /* Send ACL data */
1965 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1966 {
1967 struct hci_acl_hdr *hdr;
1968 int len = skb->len;
1969
1970 skb_push(skb, HCI_ACL_HDR_SIZE);
1971 skb_reset_transport_header(skb);
1972 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
1973 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1974 hdr->dlen = cpu_to_le16(len);
1975 }
1976
1977 void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1978 {
1979 struct hci_dev *hdev = conn->hdev;
1980 struct sk_buff *list;
1981
1982 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1983
1984 skb->dev = (void *) hdev;
1985 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1986 hci_add_acl_hdr(skb, conn->handle, flags);
1987
1988 list = skb_shinfo(skb)->frag_list;
1989 if (!list) {
1990 /* Non fragmented */
1991 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1992
1993 skb_queue_tail(&conn->data_q, skb);
1994 } else {
1995 /* Fragmented */
1996 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1997
1998 skb_shinfo(skb)->frag_list = NULL;
1999
2000 /* Queue all fragments atomically */
2001 spin_lock_bh(&conn->data_q.lock);
2002
2003 __skb_queue_tail(&conn->data_q, skb);
2004
2005 flags &= ~ACL_START;
2006 flags |= ACL_CONT;
2007 do {
2008 skb = list; list = list->next;
2009
2010 skb->dev = (void *) hdev;
2011 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2012 hci_add_acl_hdr(skb, conn->handle, flags);
2013
2014 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2015
2016 __skb_queue_tail(&conn->data_q, skb);
2017 } while (list);
2018
2019 spin_unlock_bh(&conn->data_q.lock);
2020 }
2021
2022 tasklet_schedule(&hdev->tx_task);
2023 }
2024 EXPORT_SYMBOL(hci_send_acl);
2025
2026 /* Send SCO data */
2027 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2028 {
2029 struct hci_dev *hdev = conn->hdev;
2030 struct hci_sco_hdr hdr;
2031
2032 BT_DBG("%s len %d", hdev->name, skb->len);
2033
2034 hdr.handle = cpu_to_le16(conn->handle);
2035 hdr.dlen = skb->len;
2036
2037 skb_push(skb, HCI_SCO_HDR_SIZE);
2038 skb_reset_transport_header(skb);
2039 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2040
2041 skb->dev = (void *) hdev;
2042 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2043
2044 skb_queue_tail(&conn->data_q, skb);
2045 tasklet_schedule(&hdev->tx_task);
2046 }
2047 EXPORT_SYMBOL(hci_send_sco);
2048
2049 /* ---- HCI TX task (outgoing data) ---- */
2050
2051 /* HCI Connection scheduler */
2052 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2053 {
2054 struct hci_conn_hash *h = &hdev->conn_hash;
2055 struct hci_conn *conn = NULL;
2056 int num = 0, min = ~0;
2057 struct list_head *p;
2058
2059 /* We don't have to lock device here. Connections are always
2060 * added and removed with TX task disabled. */
2061 list_for_each(p, &h->list) {
2062 struct hci_conn *c;
2063 c = list_entry(p, struct hci_conn, list);
2064
2065 if (c->type != type || skb_queue_empty(&c->data_q))
2066 continue;
2067
2068 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2069 continue;
2070
2071 num++;
2072
2073 if (c->sent < min) {
2074 min = c->sent;
2075 conn = c;
2076 }
2077 }
2078
2079 if (conn) {
2080 int cnt, q;
2081
2082 switch (conn->type) {
2083 case ACL_LINK:
2084 cnt = hdev->acl_cnt;
2085 break;
2086 case SCO_LINK:
2087 case ESCO_LINK:
2088 cnt = hdev->sco_cnt;
2089 break;
2090 case LE_LINK:
2091 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2092 break;
2093 default:
2094 cnt = 0;
2095 BT_ERR("Unknown link type");
2096 }
2097
2098 q = cnt / num;
2099 *quote = q ? q : 1;
2100 } else
2101 *quote = 0;
2102
2103 BT_DBG("conn %p quote %d", conn, *quote);
2104 return conn;
2105 }
2106
2107 static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2108 {
2109 struct hci_conn_hash *h = &hdev->conn_hash;
2110 struct list_head *p;
2111 struct hci_conn *c;
2112
2113 BT_ERR("%s link tx timeout", hdev->name);
2114
2115 /* Kill stalled connections */
2116 list_for_each(p, &h->list) {
2117 c = list_entry(p, struct hci_conn, list);
2118 if (c->type == type && c->sent) {
2119 BT_ERR("%s killing stalled connection %s",
2120 hdev->name, batostr(&c->dst));
2121 hci_acl_disconn(c, 0x13);
2122 }
2123 }
2124 }
2125
2126 static inline void hci_sched_acl(struct hci_dev *hdev)
2127 {
2128 struct hci_conn *conn;
2129 struct sk_buff *skb;
2130 int quote;
2131
2132 BT_DBG("%s", hdev->name);
2133
2134 if (!test_bit(HCI_RAW, &hdev->flags)) {
2135 /* ACL tx timeout must be longer than maximum
2136 * link supervision timeout (40.9 seconds) */
2137 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
2138 hci_link_tx_to(hdev, ACL_LINK);
2139 }
2140
2141 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
2142 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2143 BT_DBG("skb %p len %d", skb, skb->len);
2144
2145 hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active);
2146
2147 hci_send_frame(skb);
2148 hdev->acl_last_tx = jiffies;
2149
2150 hdev->acl_cnt--;
2151 conn->sent++;
2152 }
2153 }
2154 }
2155
2156 /* Schedule SCO */
2157 static inline void hci_sched_sco(struct hci_dev *hdev)
2158 {
2159 struct hci_conn *conn;
2160 struct sk_buff *skb;
2161 int quote;
2162
2163 BT_DBG("%s", hdev->name);
2164
2165 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2166 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2167 BT_DBG("skb %p len %d", skb, skb->len);
2168 hci_send_frame(skb);
2169
2170 conn->sent++;
2171 if (conn->sent == ~0)
2172 conn->sent = 0;
2173 }
2174 }
2175 }
2176
2177 static inline void hci_sched_esco(struct hci_dev *hdev)
2178 {
2179 struct hci_conn *conn;
2180 struct sk_buff *skb;
2181 int quote;
2182
2183 BT_DBG("%s", hdev->name);
2184
2185 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2186 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2187 BT_DBG("skb %p len %d", skb, skb->len);
2188 hci_send_frame(skb);
2189
2190 conn->sent++;
2191 if (conn->sent == ~0)
2192 conn->sent = 0;
2193 }
2194 }
2195 }
2196
2197 static inline void hci_sched_le(struct hci_dev *hdev)
2198 {
2199 struct hci_conn *conn;
2200 struct sk_buff *skb;
2201 int quote, cnt;
2202
2203 BT_DBG("%s", hdev->name);
2204
2205 if (!test_bit(HCI_RAW, &hdev->flags)) {
2206 /* LE tx timeout must be longer than maximum
2207 * link supervision timeout (40.9 seconds) */
2208 if (!hdev->le_cnt && hdev->le_pkts &&
2209 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2210 hci_link_tx_to(hdev, LE_LINK);
2211 }
2212
2213 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2214 while (cnt && (conn = hci_low_sent(hdev, LE_LINK, &quote))) {
2215 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2216 BT_DBG("skb %p len %d", skb, skb->len);
2217
2218 hci_send_frame(skb);
2219 hdev->le_last_tx = jiffies;
2220
2221 cnt--;
2222 conn->sent++;
2223 }
2224 }
2225 if (hdev->le_pkts)
2226 hdev->le_cnt = cnt;
2227 else
2228 hdev->acl_cnt = cnt;
2229 }
2230
2231 static void hci_tx_task(unsigned long arg)
2232 {
2233 struct hci_dev *hdev = (struct hci_dev *) arg;
2234 struct sk_buff *skb;
2235
2236 read_lock(&hci_task_lock);
2237
2238 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2239 hdev->sco_cnt, hdev->le_cnt);
2240
2241 /* Schedule queues and send stuff to HCI driver */
2242
2243 hci_sched_acl(hdev);
2244
2245 hci_sched_sco(hdev);
2246
2247 hci_sched_esco(hdev);
2248
2249 hci_sched_le(hdev);
2250
2251 /* Send next queued raw (unknown type) packet */
2252 while ((skb = skb_dequeue(&hdev->raw_q)))
2253 hci_send_frame(skb);
2254
2255 read_unlock(&hci_task_lock);
2256 }
2257
2258 /* ----- HCI RX task (incoming data processing) ----- */
2259
2260 /* ACL data packet */
2261 static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2262 {
2263 struct hci_acl_hdr *hdr = (void *) skb->data;
2264 struct hci_conn *conn;
2265 __u16 handle, flags;
2266
2267 skb_pull(skb, HCI_ACL_HDR_SIZE);
2268
2269 handle = __le16_to_cpu(hdr->handle);
2270 flags = hci_flags(handle);
2271 handle = hci_handle(handle);
2272
2273 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2274
2275 hdev->stat.acl_rx++;
2276
2277 hci_dev_lock(hdev);
2278 conn = hci_conn_hash_lookup_handle(hdev, handle);
2279 hci_dev_unlock(hdev);
2280
2281 if (conn) {
2282 register struct hci_proto *hp;
2283
2284 hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active);
2285
2286 /* Send to upper protocol */
2287 hp = hci_proto[HCI_PROTO_L2CAP];
2288 if (hp && hp->recv_acldata) {
2289 hp->recv_acldata(conn, skb, flags);
2290 return;
2291 }
2292 } else {
2293 BT_ERR("%s ACL packet for unknown connection handle %d",
2294 hdev->name, handle);
2295 }
2296
2297 kfree_skb(skb);
2298 }
2299
2300 /* SCO data packet */
2301 static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2302 {
2303 struct hci_sco_hdr *hdr = (void *) skb->data;
2304 struct hci_conn *conn;
2305 __u16 handle;
2306
2307 skb_pull(skb, HCI_SCO_HDR_SIZE);
2308
2309 handle = __le16_to_cpu(hdr->handle);
2310
2311 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2312
2313 hdev->stat.sco_rx++;
2314
2315 hci_dev_lock(hdev);
2316 conn = hci_conn_hash_lookup_handle(hdev, handle);
2317 hci_dev_unlock(hdev);
2318
2319 if (conn) {
2320 register struct hci_proto *hp;
2321
2322 /* Send to upper protocol */
2323 hp = hci_proto[HCI_PROTO_SCO];
2324 if (hp && hp->recv_scodata) {
2325 hp->recv_scodata(conn, skb);
2326 return;
2327 }
2328 } else {
2329 BT_ERR("%s SCO packet for unknown connection handle %d",
2330 hdev->name, handle);
2331 }
2332
2333 kfree_skb(skb);
2334 }
2335
2336 static void hci_rx_task(unsigned long arg)
2337 {
2338 struct hci_dev *hdev = (struct hci_dev *) arg;
2339 struct sk_buff *skb;
2340
2341 BT_DBG("%s", hdev->name);
2342
2343 read_lock(&hci_task_lock);
2344
2345 while ((skb = skb_dequeue(&hdev->rx_q))) {
2346 if (atomic_read(&hdev->promisc)) {
2347 /* Send copy to the sockets */
2348 hci_send_to_sock(hdev, skb, NULL);
2349 }
2350
2351 if (test_bit(HCI_RAW, &hdev->flags)) {
2352 kfree_skb(skb);
2353 continue;
2354 }
2355
2356 if (test_bit(HCI_INIT, &hdev->flags)) {
2357 /* Don't process data packets in this states. */
2358 switch (bt_cb(skb)->pkt_type) {
2359 case HCI_ACLDATA_PKT:
2360 case HCI_SCODATA_PKT:
2361 kfree_skb(skb);
2362 continue;
2363 }
2364 }
2365
2366 /* Process frame */
2367 switch (bt_cb(skb)->pkt_type) {
2368 case HCI_EVENT_PKT:
2369 hci_event_packet(hdev, skb);
2370 break;
2371
2372 case HCI_ACLDATA_PKT:
2373 BT_DBG("%s ACL data packet", hdev->name);
2374 hci_acldata_packet(hdev, skb);
2375 break;
2376
2377 case HCI_SCODATA_PKT:
2378 BT_DBG("%s SCO data packet", hdev->name);
2379 hci_scodata_packet(hdev, skb);
2380 break;
2381
2382 default:
2383 kfree_skb(skb);
2384 break;
2385 }
2386 }
2387
2388 read_unlock(&hci_task_lock);
2389 }
2390
2391 static void hci_cmd_task(unsigned long arg)
2392 {
2393 struct hci_dev *hdev = (struct hci_dev *) arg;
2394 struct sk_buff *skb;
2395
2396 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2397
2398 /* Send queued commands */
2399 if (atomic_read(&hdev->cmd_cnt)) {
2400 skb = skb_dequeue(&hdev->cmd_q);
2401 if (!skb)
2402 return;
2403
2404 kfree_skb(hdev->sent_cmd);
2405
2406 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2407 if (hdev->sent_cmd) {
2408 atomic_dec(&hdev->cmd_cnt);
2409 hci_send_frame(skb);
2410 if (test_bit(HCI_RESET, &hdev->flags))
2411 del_timer(&hdev->cmd_timer);
2412 else
2413 mod_timer(&hdev->cmd_timer,
2414 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
2415 } else {
2416 skb_queue_head(&hdev->cmd_q, skb);
2417 tasklet_schedule(&hdev->cmd_task);
2418 }
2419 }
2420 }
kernel source for telekom puls (alcatel/mediatek)