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ASoC: Ensure we delay long enough for WM8994 FLL to lock
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / bluetooth / hci_core.c
blob2f768de8701178091008cca90346647790fe6706
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 <net/sock.h>
45
46 #include <asm/system.h>
47 #include <asm/uaccess.h>
48 #include <asm/unaligned.h>
49
50 #include <net/bluetooth/bluetooth.h>
51 #include <net/bluetooth/hci_core.h>
52
53 static void hci_cmd_task(unsigned long arg);
54 static void hci_rx_task(unsigned long arg);
55 static void hci_tx_task(unsigned long arg);
56 static void hci_notify(struct hci_dev *hdev, int event);
57
58 static DEFINE_RWLOCK(hci_task_lock);
59
60 /* HCI device list */
61 LIST_HEAD(hci_dev_list);
62 DEFINE_RWLOCK(hci_dev_list_lock);
63
64 /* HCI callback list */
65 LIST_HEAD(hci_cb_list);
66 DEFINE_RWLOCK(hci_cb_list_lock);
67
68 /* HCI protocols */
69 #define HCI_MAX_PROTO 2
70 struct hci_proto *hci_proto[HCI_MAX_PROTO];
71
72 /* HCI notifiers list */
73 static ATOMIC_NOTIFIER_HEAD(hci_notifier);
74
75 /* ---- HCI notifications ---- */
76
77 int hci_register_notifier(struct notifier_block *nb)
78 {
79 return atomic_notifier_chain_register(&hci_notifier, nb);
80 }
81
82 int hci_unregister_notifier(struct notifier_block *nb)
83 {
84 return atomic_notifier_chain_unregister(&hci_notifier, nb);
85 }
86
87 static void hci_notify(struct hci_dev *hdev, int event)
88 {
89 atomic_notifier_call_chain(&hci_notifier, event, hdev);
90 }
91
92 /* ---- HCI requests ---- */
93
94 void hci_req_complete(struct hci_dev *hdev, int result)
95 {
96 BT_DBG("%s result 0x%2.2x", hdev->name, result);
97
98 if (hdev->req_status == HCI_REQ_PEND) {
99 hdev->req_result = result;
100 hdev->req_status = HCI_REQ_DONE;
101 wake_up_interruptible(&hdev->req_wait_q);
102 }
103 }
104
105 static void hci_req_cancel(struct hci_dev *hdev, int err)
106 {
107 BT_DBG("%s err 0x%2.2x", hdev->name, err);
108
109 if (hdev->req_status == HCI_REQ_PEND) {
110 hdev->req_result = err;
111 hdev->req_status = HCI_REQ_CANCELED;
112 wake_up_interruptible(&hdev->req_wait_q);
113 }
114 }
115
116 /* Execute request and wait for completion. */
117 static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
118 unsigned long opt, __u32 timeout)
119 {
120 DECLARE_WAITQUEUE(wait, current);
121 int err = 0;
122
123 BT_DBG("%s start", hdev->name);
124
125 hdev->req_status = HCI_REQ_PEND;
126
127 add_wait_queue(&hdev->req_wait_q, &wait);
128 set_current_state(TASK_INTERRUPTIBLE);
129
130 req(hdev, opt);
131 schedule_timeout(timeout);
132
133 remove_wait_queue(&hdev->req_wait_q, &wait);
134
135 if (signal_pending(current))
136 return -EINTR;
137
138 switch (hdev->req_status) {
139 case HCI_REQ_DONE:
140 err = -bt_err(hdev->req_result);
141 break;
142
143 case HCI_REQ_CANCELED:
144 err = -hdev->req_result;
145 break;
146
147 default:
148 err = -ETIMEDOUT;
149 break;
150 }
151
152 hdev->req_status = hdev->req_result = 0;
153
154 BT_DBG("%s end: err %d", hdev->name, err);
155
156 return err;
157 }
158
159 static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
160 unsigned long opt, __u32 timeout)
161 {
162 int ret;
163
164 if (!test_bit(HCI_UP, &hdev->flags))
165 return -ENETDOWN;
166
167 /* Serialize all requests */
168 hci_req_lock(hdev);
169 ret = __hci_request(hdev, req, opt, timeout);
170 hci_req_unlock(hdev);
171
172 return ret;
173 }
174
175 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
176 {
177 BT_DBG("%s %ld", hdev->name, opt);
178
179 /* Reset device */
180 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
181 }
182
183 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
184 {
185 struct sk_buff *skb;
186 __le16 param;
187 __u8 flt_type;
188
189 BT_DBG("%s %ld", hdev->name, opt);
190
191 /* Driver initialization */
192
193 /* Special commands */
194 while ((skb = skb_dequeue(&hdev->driver_init))) {
195 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
196 skb->dev = (void *) hdev;
197
198 skb_queue_tail(&hdev->cmd_q, skb);
199 tasklet_schedule(&hdev->cmd_task);
200 }
201 skb_queue_purge(&hdev->driver_init);
202
203 /* Mandatory initialization */
204
205 /* Reset */
206 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks))
207 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
208
209 /* Read Local Supported Features */
210 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
211
212 /* Read Local Version */
213 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
214
215 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
216 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
217
218 #if 0
219 /* Host buffer size */
220 {
221 struct hci_cp_host_buffer_size cp;
222 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
223 cp.sco_mtu = HCI_MAX_SCO_SIZE;
224 cp.acl_max_pkt = cpu_to_le16(0xffff);
225 cp.sco_max_pkt = cpu_to_le16(0xffff);
226 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
227 }
228 #endif
229
230 /* Read BD Address */
231 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
232
233 /* Read Class of Device */
234 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
235
236 /* Read Local Name */
237 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
238
239 /* Read Voice Setting */
240 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
241
242 /* Optional initialization */
243
244 /* Clear Event Filters */
245 flt_type = HCI_FLT_CLEAR_ALL;
246 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
247
248 /* Page timeout ~20 secs */
249 param = cpu_to_le16(0x8000);
250 hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, &param);
251
252 /* Connection accept timeout ~20 secs */
253 param = cpu_to_le16(0x7d00);
254 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
255 }
256
257 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
258 {
259 __u8 scan = opt;
260
261 BT_DBG("%s %x", hdev->name, scan);
262
263 /* Inquiry and Page scans */
264 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
265 }
266
267 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
268 {
269 __u8 auth = opt;
270
271 BT_DBG("%s %x", hdev->name, auth);
272
273 /* Authentication */
274 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
275 }
276
277 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
278 {
279 __u8 encrypt = opt;
280
281 BT_DBG("%s %x", hdev->name, encrypt);
282
283 /* Encryption */
284 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
285 }
286
287 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
288 {
289 __le16 policy = cpu_to_le16(opt);
290
291 BT_DBG("%s %x", hdev->name, policy);
292
293 /* Default link policy */
294 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
295 }
296
297 /* Get HCI device by index.
298 * Device is held on return. */
299 struct hci_dev *hci_dev_get(int index)
300 {
301 struct hci_dev *hdev = NULL;
302 struct list_head *p;
303
304 BT_DBG("%d", index);
305
306 if (index < 0)
307 return NULL;
308
309 read_lock(&hci_dev_list_lock);
310 list_for_each(p, &hci_dev_list) {
311 struct hci_dev *d = list_entry(p, struct hci_dev, list);
312 if (d->id == index) {
313 hdev = hci_dev_hold(d);
314 break;
315 }
316 }
317 read_unlock(&hci_dev_list_lock);
318 return hdev;
319 }
320
321 /* ---- Inquiry support ---- */
322 static void inquiry_cache_flush(struct hci_dev *hdev)
323 {
324 struct inquiry_cache *cache = &hdev->inq_cache;
325 struct inquiry_entry *next = cache->list, *e;
326
327 BT_DBG("cache %p", cache);
328
329 cache->list = NULL;
330 while ((e = next)) {
331 next = e->next;
332 kfree(e);
333 }
334 }
335
336 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
337 {
338 struct inquiry_cache *cache = &hdev->inq_cache;
339 struct inquiry_entry *e;
340
341 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
342
343 for (e = cache->list; e; e = e->next)
344 if (!bacmp(&e->data.bdaddr, bdaddr))
345 break;
346 return e;
347 }
348
349 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
350 {
351 struct inquiry_cache *cache = &hdev->inq_cache;
352 struct inquiry_entry *e;
353
354 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
355
356 if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) {
357 /* Entry not in the cache. Add new one. */
358 if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC)))
359 return;
360 e->next = cache->list;
361 cache->list = e;
362 }
363
364 memcpy(&e->data, data, sizeof(*data));
365 e->timestamp = jiffies;
366 cache->timestamp = jiffies;
367 }
368
369 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
370 {
371 struct inquiry_cache *cache = &hdev->inq_cache;
372 struct inquiry_info *info = (struct inquiry_info *) buf;
373 struct inquiry_entry *e;
374 int copied = 0;
375
376 for (e = cache->list; e && copied < num; e = e->next, copied++) {
377 struct inquiry_data *data = &e->data;
378 bacpy(&info->bdaddr, &data->bdaddr);
379 info->pscan_rep_mode = data->pscan_rep_mode;
380 info->pscan_period_mode = data->pscan_period_mode;
381 info->pscan_mode = data->pscan_mode;
382 memcpy(info->dev_class, data->dev_class, 3);
383 info->clock_offset = data->clock_offset;
384 info++;
385 }
386
387 BT_DBG("cache %p, copied %d", cache, copied);
388 return copied;
389 }
390
391 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
392 {
393 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
394 struct hci_cp_inquiry cp;
395
396 BT_DBG("%s", hdev->name);
397
398 if (test_bit(HCI_INQUIRY, &hdev->flags))
399 return;
400
401 /* Start Inquiry */
402 memcpy(&cp.lap, &ir->lap, 3);
403 cp.length = ir->length;
404 cp.num_rsp = ir->num_rsp;
405 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
406 }
407
408 int hci_inquiry(void __user *arg)
409 {
410 __u8 __user *ptr = arg;
411 struct hci_inquiry_req ir;
412 struct hci_dev *hdev;
413 int err = 0, do_inquiry = 0, max_rsp;
414 long timeo;
415 __u8 *buf;
416
417 if (copy_from_user(&ir, ptr, sizeof(ir)))
418 return -EFAULT;
419
420 if (!(hdev = hci_dev_get(ir.dev_id)))
421 return -ENODEV;
422
423 hci_dev_lock_bh(hdev);
424 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
425 inquiry_cache_empty(hdev) ||
426 ir.flags & IREQ_CACHE_FLUSH) {
427 inquiry_cache_flush(hdev);
428 do_inquiry = 1;
429 }
430 hci_dev_unlock_bh(hdev);
431
432 timeo = ir.length * msecs_to_jiffies(2000);
433 if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0)
434 goto done;
435
436 /* for unlimited number of responses we will use buffer with 255 entries */
437 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
438
439 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
440 * copy it to the user space.
441 */
442 if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) {
443 err = -ENOMEM;
444 goto done;
445 }
446
447 hci_dev_lock_bh(hdev);
448 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
449 hci_dev_unlock_bh(hdev);
450
451 BT_DBG("num_rsp %d", ir.num_rsp);
452
453 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
454 ptr += sizeof(ir);
455 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
456 ir.num_rsp))
457 err = -EFAULT;
458 } else
459 err = -EFAULT;
460
461 kfree(buf);
462
463 done:
464 hci_dev_put(hdev);
465 return err;
466 }
467
468 /* ---- HCI ioctl helpers ---- */
469
470 int hci_dev_open(__u16 dev)
471 {
472 struct hci_dev *hdev;
473 int ret = 0;
474
475 if (!(hdev = hci_dev_get(dev)))
476 return -ENODEV;
477
478 BT_DBG("%s %p", hdev->name, hdev);
479
480 hci_req_lock(hdev);
481
482 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
483 ret = -ERFKILL;
484 goto done;
485 }
486
487 if (test_bit(HCI_UP, &hdev->flags)) {
488 ret = -EALREADY;
489 goto done;
490 }
491
492 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
493 set_bit(HCI_RAW, &hdev->flags);
494
495 /* Treat all non BR/EDR controllers as raw devices for now */
496 if (hdev->dev_type != HCI_BREDR)
497 set_bit(HCI_RAW, &hdev->flags);
498
499 if (hdev->open(hdev)) {
500 ret = -EIO;
501 goto done;
502 }
503
504 if (!test_bit(HCI_RAW, &hdev->flags)) {
505 atomic_set(&hdev->cmd_cnt, 1);
506 set_bit(HCI_INIT, &hdev->flags);
507
508 //__hci_request(hdev, hci_reset_req, 0, HZ);
509 ret = __hci_request(hdev, hci_init_req, 0,
510 msecs_to_jiffies(HCI_INIT_TIMEOUT));
511
512 clear_bit(HCI_INIT, &hdev->flags);
513 }
514
515 if (!ret) {
516 hci_dev_hold(hdev);
517 set_bit(HCI_UP, &hdev->flags);
518 hci_notify(hdev, HCI_DEV_UP);
519 } else {
520 /* Init failed, cleanup */
521 tasklet_kill(&hdev->rx_task);
522 tasklet_kill(&hdev->tx_task);
523 tasklet_kill(&hdev->cmd_task);
524
525 skb_queue_purge(&hdev->cmd_q);
526 skb_queue_purge(&hdev->rx_q);
527
528 if (hdev->flush)
529 hdev->flush(hdev);
530
531 if (hdev->sent_cmd) {
532 kfree_skb(hdev->sent_cmd);
533 hdev->sent_cmd = NULL;
534 }
535
536 hdev->close(hdev);
537 hdev->flags = 0;
538 }
539
540 done:
541 hci_req_unlock(hdev);
542 hci_dev_put(hdev);
543 return ret;
544 }
545
546 static int hci_dev_do_close(struct hci_dev *hdev)
547 {
548 BT_DBG("%s %p", hdev->name, hdev);
549
550 hci_req_cancel(hdev, ENODEV);
551 hci_req_lock(hdev);
552
553 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
554 hci_req_unlock(hdev);
555 return 0;
556 }
557
558 /* Kill RX and TX tasks */
559 tasklet_kill(&hdev->rx_task);
560 tasklet_kill(&hdev->tx_task);
561
562 hci_dev_lock_bh(hdev);
563 inquiry_cache_flush(hdev);
564 hci_conn_hash_flush(hdev);
565 hci_dev_unlock_bh(hdev);
566
567 hci_notify(hdev, HCI_DEV_DOWN);
568
569 if (hdev->flush)
570 hdev->flush(hdev);
571
572 /* Reset device */
573 skb_queue_purge(&hdev->cmd_q);
574 atomic_set(&hdev->cmd_cnt, 1);
575 if (!test_bit(HCI_RAW, &hdev->flags)) {
576 set_bit(HCI_INIT, &hdev->flags);
577 __hci_request(hdev, hci_reset_req, 0,
578 msecs_to_jiffies(250));
579 clear_bit(HCI_INIT, &hdev->flags);
580 }
581
582 /* Kill cmd task */
583 tasklet_kill(&hdev->cmd_task);
584
585 /* Drop queues */
586 skb_queue_purge(&hdev->rx_q);
587 skb_queue_purge(&hdev->cmd_q);
588 skb_queue_purge(&hdev->raw_q);
589
590 /* Drop last sent command */
591 if (hdev->sent_cmd) {
592 kfree_skb(hdev->sent_cmd);
593 hdev->sent_cmd = NULL;
594 }
595
596 /* After this point our queues are empty
597 * and no tasks are scheduled. */
598 hdev->close(hdev);
599
600 /* Clear flags */
601 hdev->flags = 0;
602
603 hci_req_unlock(hdev);
604
605 hci_dev_put(hdev);
606 return 0;
607 }
608
609 int hci_dev_close(__u16 dev)
610 {
611 struct hci_dev *hdev;
612 int err;
613
614 if (!(hdev = hci_dev_get(dev)))
615 return -ENODEV;
616 err = hci_dev_do_close(hdev);
617 hci_dev_put(hdev);
618 return err;
619 }
620
621 int hci_dev_reset(__u16 dev)
622 {
623 struct hci_dev *hdev;
624 int ret = 0;
625
626 if (!(hdev = hci_dev_get(dev)))
627 return -ENODEV;
628
629 hci_req_lock(hdev);
630 tasklet_disable(&hdev->tx_task);
631
632 if (!test_bit(HCI_UP, &hdev->flags))
633 goto done;
634
635 /* Drop queues */
636 skb_queue_purge(&hdev->rx_q);
637 skb_queue_purge(&hdev->cmd_q);
638
639 hci_dev_lock_bh(hdev);
640 inquiry_cache_flush(hdev);
641 hci_conn_hash_flush(hdev);
642 hci_dev_unlock_bh(hdev);
643
644 if (hdev->flush)
645 hdev->flush(hdev);
646
647 atomic_set(&hdev->cmd_cnt, 1);
648 hdev->acl_cnt = 0; hdev->sco_cnt = 0;
649
650 if (!test_bit(HCI_RAW, &hdev->flags))
651 ret = __hci_request(hdev, hci_reset_req, 0,
652 msecs_to_jiffies(HCI_INIT_TIMEOUT));
653
654 done:
655 tasklet_enable(&hdev->tx_task);
656 hci_req_unlock(hdev);
657 hci_dev_put(hdev);
658 return ret;
659 }
660
661 int hci_dev_reset_stat(__u16 dev)
662 {
663 struct hci_dev *hdev;
664 int ret = 0;
665
666 if (!(hdev = hci_dev_get(dev)))
667 return -ENODEV;
668
669 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
670
671 hci_dev_put(hdev);
672
673 return ret;
674 }
675
676 int hci_dev_cmd(unsigned int cmd, void __user *arg)
677 {
678 struct hci_dev *hdev;
679 struct hci_dev_req dr;
680 int err = 0;
681
682 if (copy_from_user(&dr, arg, sizeof(dr)))
683 return -EFAULT;
684
685 if (!(hdev = hci_dev_get(dr.dev_id)))
686 return -ENODEV;
687
688 switch (cmd) {
689 case HCISETAUTH:
690 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
691 msecs_to_jiffies(HCI_INIT_TIMEOUT));
692 break;
693
694 case HCISETENCRYPT:
695 if (!lmp_encrypt_capable(hdev)) {
696 err = -EOPNOTSUPP;
697 break;
698 }
699
700 if (!test_bit(HCI_AUTH, &hdev->flags)) {
701 /* Auth must be enabled first */
702 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
703 msecs_to_jiffies(HCI_INIT_TIMEOUT));
704 if (err)
705 break;
706 }
707
708 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
709 msecs_to_jiffies(HCI_INIT_TIMEOUT));
710 break;
711
712 case HCISETSCAN:
713 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
714 msecs_to_jiffies(HCI_INIT_TIMEOUT));
715 break;
716
717 case HCISETLINKPOL:
718 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
719 msecs_to_jiffies(HCI_INIT_TIMEOUT));
720 break;
721
722 case HCISETLINKMODE:
723 hdev->link_mode = ((__u16) dr.dev_opt) &
724 (HCI_LM_MASTER | HCI_LM_ACCEPT);
725 break;
726
727 case HCISETPTYPE:
728 hdev->pkt_type = (__u16) dr.dev_opt;
729 break;
730
731 case HCISETACLMTU:
732 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
733 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
734 break;
735
736 case HCISETSCOMTU:
737 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
738 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
739 break;
740
741 default:
742 err = -EINVAL;
743 break;
744 }
745
746 hci_dev_put(hdev);
747 return err;
748 }
749
750 int hci_get_dev_list(void __user *arg)
751 {
752 struct hci_dev_list_req *dl;
753 struct hci_dev_req *dr;
754 struct list_head *p;
755 int n = 0, size, err;
756 __u16 dev_num;
757
758 if (get_user(dev_num, (__u16 __user *) arg))
759 return -EFAULT;
760
761 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
762 return -EINVAL;
763
764 size = sizeof(*dl) + dev_num * sizeof(*dr);
765
766 if (!(dl = kzalloc(size, GFP_KERNEL)))
767 return -ENOMEM;
768
769 dr = dl->dev_req;
770
771 read_lock_bh(&hci_dev_list_lock);
772 list_for_each(p, &hci_dev_list) {
773 struct hci_dev *hdev;
774 hdev = list_entry(p, struct hci_dev, list);
775 (dr + n)->dev_id = hdev->id;
776 (dr + n)->dev_opt = hdev->flags;
777 if (++n >= dev_num)
778 break;
779 }
780 read_unlock_bh(&hci_dev_list_lock);
781
782 dl->dev_num = n;
783 size = sizeof(*dl) + n * sizeof(*dr);
784
785 err = copy_to_user(arg, dl, size);
786 kfree(dl);
787
788 return err ? -EFAULT : 0;
789 }
790
791 int hci_get_dev_info(void __user *arg)
792 {
793 struct hci_dev *hdev;
794 struct hci_dev_info di;
795 int err = 0;
796
797 if (copy_from_user(&di, arg, sizeof(di)))
798 return -EFAULT;
799
800 if (!(hdev = hci_dev_get(di.dev_id)))
801 return -ENODEV;
802
803 strcpy(di.name, hdev->name);
804 di.bdaddr = hdev->bdaddr;
805 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
806 di.flags = hdev->flags;
807 di.pkt_type = hdev->pkt_type;
808 di.acl_mtu = hdev->acl_mtu;
809 di.acl_pkts = hdev->acl_pkts;
810 di.sco_mtu = hdev->sco_mtu;
811 di.sco_pkts = hdev->sco_pkts;
812 di.link_policy = hdev->link_policy;
813 di.link_mode = hdev->link_mode;
814
815 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
816 memcpy(&di.features, &hdev->features, sizeof(di.features));
817
818 if (copy_to_user(arg, &di, sizeof(di)))
819 err = -EFAULT;
820
821 hci_dev_put(hdev);
822
823 return err;
824 }
825
826 /* ---- Interface to HCI drivers ---- */
827
828 static int hci_rfkill_set_block(void *data, bool blocked)
829 {
830 struct hci_dev *hdev = data;
831
832 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
833
834 if (!blocked)
835 return 0;
836
837 hci_dev_do_close(hdev);
838
839 return 0;
840 }
841
842 static const struct rfkill_ops hci_rfkill_ops = {
843 .set_block = hci_rfkill_set_block,
844 };
845
846 /* Alloc HCI device */
847 struct hci_dev *hci_alloc_dev(void)
848 {
849 struct hci_dev *hdev;
850
851 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
852 if (!hdev)
853 return NULL;
854
855 skb_queue_head_init(&hdev->driver_init);
856
857 return hdev;
858 }
859 EXPORT_SYMBOL(hci_alloc_dev);
860
861 /* Free HCI device */
862 void hci_free_dev(struct hci_dev *hdev)
863 {
864 skb_queue_purge(&hdev->driver_init);
865
866 /* will free via device release */
867 put_device(&hdev->dev);
868 }
869 EXPORT_SYMBOL(hci_free_dev);
870
871 /* Register HCI device */
872 int hci_register_dev(struct hci_dev *hdev)
873 {
874 struct list_head *head = &hci_dev_list, *p;
875 int i, id = 0;
876
877 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
878 hdev->bus, hdev->owner);
879
880 if (!hdev->open || !hdev->close || !hdev->destruct)
881 return -EINVAL;
882
883 write_lock_bh(&hci_dev_list_lock);
884
885 /* Find first available device id */
886 list_for_each(p, &hci_dev_list) {
887 if (list_entry(p, struct hci_dev, list)->id != id)
888 break;
889 head = p; id++;
890 }
891
892 sprintf(hdev->name, "hci%d", id);
893 hdev->id = id;
894 list_add(&hdev->list, head);
895
896 atomic_set(&hdev->refcnt, 1);
897 spin_lock_init(&hdev->lock);
898
899 hdev->flags = 0;
900 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
901 hdev->esco_type = (ESCO_HV1);
902 hdev->link_mode = (HCI_LM_ACCEPT);
903
904 hdev->idle_timeout = 0;
905 hdev->sniff_max_interval = 800;
906 hdev->sniff_min_interval = 80;
907
908 tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev);
909 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
910 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
911
912 skb_queue_head_init(&hdev->rx_q);
913 skb_queue_head_init(&hdev->cmd_q);
914 skb_queue_head_init(&hdev->raw_q);
915
916 for (i = 0; i < 3; i++)
917 hdev->reassembly[i] = NULL;
918
919 init_waitqueue_head(&hdev->req_wait_q);
920 mutex_init(&hdev->req_lock);
921
922 inquiry_cache_init(hdev);
923
924 hci_conn_hash_init(hdev);
925
926 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
927
928 atomic_set(&hdev->promisc, 0);
929
930 write_unlock_bh(&hci_dev_list_lock);
931
932 hdev->workqueue = create_singlethread_workqueue(hdev->name);
933 if (!hdev->workqueue)
934 goto nomem;
935
936 hci_register_sysfs(hdev);
937
938 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
939 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
940 if (hdev->rfkill) {
941 if (rfkill_register(hdev->rfkill) < 0) {
942 rfkill_destroy(hdev->rfkill);
943 hdev->rfkill = NULL;
944 }
945 }
946
947 hci_notify(hdev, HCI_DEV_REG);
948
949 return id;
950
951 nomem:
952 write_lock_bh(&hci_dev_list_lock);
953 list_del(&hdev->list);
954 write_unlock_bh(&hci_dev_list_lock);
955
956 return -ENOMEM;
957 }
958 EXPORT_SYMBOL(hci_register_dev);
959
960 /* Unregister HCI device */
961 int hci_unregister_dev(struct hci_dev *hdev)
962 {
963 int i;
964
965 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
966
967 write_lock_bh(&hci_dev_list_lock);
968 list_del(&hdev->list);
969 write_unlock_bh(&hci_dev_list_lock);
970
971 hci_dev_do_close(hdev);
972
973 for (i = 0; i < 3; i++)
974 kfree_skb(hdev->reassembly[i]);
975
976 hci_notify(hdev, HCI_DEV_UNREG);
977
978 if (hdev->rfkill) {
979 rfkill_unregister(hdev->rfkill);
980 rfkill_destroy(hdev->rfkill);
981 }
982
983 hci_unregister_sysfs(hdev);
984
985 destroy_workqueue(hdev->workqueue);
986
987 __hci_dev_put(hdev);
988
989 return 0;
990 }
991 EXPORT_SYMBOL(hci_unregister_dev);
992
993 /* Suspend HCI device */
994 int hci_suspend_dev(struct hci_dev *hdev)
995 {
996 hci_notify(hdev, HCI_DEV_SUSPEND);
997 return 0;
998 }
999 EXPORT_SYMBOL(hci_suspend_dev);
1000
1001 /* Resume HCI device */
1002 int hci_resume_dev(struct hci_dev *hdev)
1003 {
1004 hci_notify(hdev, HCI_DEV_RESUME);
1005 return 0;
1006 }
1007 EXPORT_SYMBOL(hci_resume_dev);
1008
1009 /* Receive frame from HCI drivers */
1010 int hci_recv_frame(struct sk_buff *skb)
1011 {
1012 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1013 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1014 && !test_bit(HCI_INIT, &hdev->flags))) {
1015 kfree_skb(skb);
1016 return -ENXIO;
1017 }
1018
1019 /* Incomming skb */
1020 bt_cb(skb)->incoming = 1;
1021
1022 /* Time stamp */
1023 __net_timestamp(skb);
1024
1025 /* Queue frame for rx task */
1026 skb_queue_tail(&hdev->rx_q, skb);
1027 tasklet_schedule(&hdev->rx_task);
1028
1029 return 0;
1030 }
1031 EXPORT_SYMBOL(hci_recv_frame);
1032
1033 /* Receive packet type fragment */
1034 #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2])
1035
1036 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1037 {
1038 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1039 return -EILSEQ;
1040
1041 while (count) {
1042 struct sk_buff *skb = __reassembly(hdev, type);
1043 struct { int expect; } *scb;
1044 int len = 0;
1045
1046 if (!skb) {
1047 /* Start of the frame */
1048
1049 switch (type) {
1050 case HCI_EVENT_PKT:
1051 if (count >= HCI_EVENT_HDR_SIZE) {
1052 struct hci_event_hdr *h = data;
1053 len = HCI_EVENT_HDR_SIZE + h->plen;
1054 } else
1055 return -EILSEQ;
1056 break;
1057
1058 case HCI_ACLDATA_PKT:
1059 if (count >= HCI_ACL_HDR_SIZE) {
1060 struct hci_acl_hdr *h = data;
1061 len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen);
1062 } else
1063 return -EILSEQ;
1064 break;
1065
1066 case HCI_SCODATA_PKT:
1067 if (count >= HCI_SCO_HDR_SIZE) {
1068 struct hci_sco_hdr *h = data;
1069 len = HCI_SCO_HDR_SIZE + h->dlen;
1070 } else
1071 return -EILSEQ;
1072 break;
1073 }
1074
1075 skb = bt_skb_alloc(len, GFP_ATOMIC);
1076 if (!skb) {
1077 BT_ERR("%s no memory for packet", hdev->name);
1078 return -ENOMEM;
1079 }
1080
1081 skb->dev = (void *) hdev;
1082 bt_cb(skb)->pkt_type = type;
1083
1084 __reassembly(hdev, type) = skb;
1085
1086 scb = (void *) skb->cb;
1087 scb->expect = len;
1088 } else {
1089 /* Continuation */
1090
1091 scb = (void *) skb->cb;
1092 len = scb->expect;
1093 }
1094
1095 len = min(len, count);
1096
1097 memcpy(skb_put(skb, len), data, len);
1098
1099 scb->expect -= len;
1100
1101 if (scb->expect == 0) {
1102 /* Complete frame */
1103
1104 __reassembly(hdev, type) = NULL;
1105
1106 bt_cb(skb)->pkt_type = type;
1107 hci_recv_frame(skb);
1108 }
1109
1110 count -= len; data += len;
1111 }
1112
1113 return 0;
1114 }
1115 EXPORT_SYMBOL(hci_recv_fragment);
1116
1117 /* ---- Interface to upper protocols ---- */
1118
1119 /* Register/Unregister protocols.
1120 * hci_task_lock is used to ensure that no tasks are running. */
1121 int hci_register_proto(struct hci_proto *hp)
1122 {
1123 int err = 0;
1124
1125 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1126
1127 if (hp->id >= HCI_MAX_PROTO)
1128 return -EINVAL;
1129
1130 write_lock_bh(&hci_task_lock);
1131
1132 if (!hci_proto[hp->id])
1133 hci_proto[hp->id] = hp;
1134 else
1135 err = -EEXIST;
1136
1137 write_unlock_bh(&hci_task_lock);
1138
1139 return err;
1140 }
1141 EXPORT_SYMBOL(hci_register_proto);
1142
1143 int hci_unregister_proto(struct hci_proto *hp)
1144 {
1145 int err = 0;
1146
1147 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1148
1149 if (hp->id >= HCI_MAX_PROTO)
1150 return -EINVAL;
1151
1152 write_lock_bh(&hci_task_lock);
1153
1154 if (hci_proto[hp->id])
1155 hci_proto[hp->id] = NULL;
1156 else
1157 err = -ENOENT;
1158
1159 write_unlock_bh(&hci_task_lock);
1160
1161 return err;
1162 }
1163 EXPORT_SYMBOL(hci_unregister_proto);
1164
1165 int hci_register_cb(struct hci_cb *cb)
1166 {
1167 BT_DBG("%p name %s", cb, cb->name);
1168
1169 write_lock_bh(&hci_cb_list_lock);
1170 list_add(&cb->list, &hci_cb_list);
1171 write_unlock_bh(&hci_cb_list_lock);
1172
1173 return 0;
1174 }
1175 EXPORT_SYMBOL(hci_register_cb);
1176
1177 int hci_unregister_cb(struct hci_cb *cb)
1178 {
1179 BT_DBG("%p name %s", cb, cb->name);
1180
1181 write_lock_bh(&hci_cb_list_lock);
1182 list_del(&cb->list);
1183 write_unlock_bh(&hci_cb_list_lock);
1184
1185 return 0;
1186 }
1187 EXPORT_SYMBOL(hci_unregister_cb);
1188
1189 static int hci_send_frame(struct sk_buff *skb)
1190 {
1191 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1192
1193 if (!hdev) {
1194 kfree_skb(skb);
1195 return -ENODEV;
1196 }
1197
1198 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1199
1200 if (atomic_read(&hdev->promisc)) {
1201 /* Time stamp */
1202 __net_timestamp(skb);
1203
1204 hci_send_to_sock(hdev, skb);
1205 }
1206
1207 /* Get rid of skb owner, prior to sending to the driver. */
1208 skb_orphan(skb);
1209
1210 return hdev->send(skb);
1211 }
1212
1213 /* Send HCI command */
1214 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1215 {
1216 int len = HCI_COMMAND_HDR_SIZE + plen;
1217 struct hci_command_hdr *hdr;
1218 struct sk_buff *skb;
1219
1220 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1221
1222 skb = bt_skb_alloc(len, GFP_ATOMIC);
1223 if (!skb) {
1224 BT_ERR("%s no memory for command", hdev->name);
1225 return -ENOMEM;
1226 }
1227
1228 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
1229 hdr->opcode = cpu_to_le16(opcode);
1230 hdr->plen = plen;
1231
1232 if (plen)
1233 memcpy(skb_put(skb, plen), param, plen);
1234
1235 BT_DBG("skb len %d", skb->len);
1236
1237 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1238 skb->dev = (void *) hdev;
1239
1240 skb_queue_tail(&hdev->cmd_q, skb);
1241 tasklet_schedule(&hdev->cmd_task);
1242
1243 return 0;
1244 }
1245
1246 /* Get data from the previously sent command */
1247 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1248 {
1249 struct hci_command_hdr *hdr;
1250
1251 if (!hdev->sent_cmd)
1252 return NULL;
1253
1254 hdr = (void *) hdev->sent_cmd->data;
1255
1256 if (hdr->opcode != cpu_to_le16(opcode))
1257 return NULL;
1258
1259 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1260
1261 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1262 }
1263
1264 /* Send ACL data */
1265 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1266 {
1267 struct hci_acl_hdr *hdr;
1268 int len = skb->len;
1269
1270 skb_push(skb, HCI_ACL_HDR_SIZE);
1271 skb_reset_transport_header(skb);
1272 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
1273 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1274 hdr->dlen = cpu_to_le16(len);
1275 }
1276
1277 void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1278 {
1279 struct hci_dev *hdev = conn->hdev;
1280 struct sk_buff *list;
1281
1282 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1283
1284 skb->dev = (void *) hdev;
1285 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1286 hci_add_acl_hdr(skb, conn->handle, flags | ACL_START);
1287
1288 if (!(list = skb_shinfo(skb)->frag_list)) {
1289 /* Non fragmented */
1290 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1291
1292 skb_queue_tail(&conn->data_q, skb);
1293 } else {
1294 /* Fragmented */
1295 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1296
1297 skb_shinfo(skb)->frag_list = NULL;
1298
1299 /* Queue all fragments atomically */
1300 spin_lock_bh(&conn->data_q.lock);
1301
1302 __skb_queue_tail(&conn->data_q, skb);
1303 do {
1304 skb = list; list = list->next;
1305
1306 skb->dev = (void *) hdev;
1307 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1308 hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT);
1309
1310 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1311
1312 __skb_queue_tail(&conn->data_q, skb);
1313 } while (list);
1314
1315 spin_unlock_bh(&conn->data_q.lock);
1316 }
1317
1318 tasklet_schedule(&hdev->tx_task);
1319 }
1320 EXPORT_SYMBOL(hci_send_acl);
1321
1322 /* Send SCO data */
1323 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1324 {
1325 struct hci_dev *hdev = conn->hdev;
1326 struct hci_sco_hdr hdr;
1327
1328 BT_DBG("%s len %d", hdev->name, skb->len);
1329
1330 hdr.handle = cpu_to_le16(conn->handle);
1331 hdr.dlen = skb->len;
1332
1333 skb_push(skb, HCI_SCO_HDR_SIZE);
1334 skb_reset_transport_header(skb);
1335 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1336
1337 skb->dev = (void *) hdev;
1338 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
1339
1340 skb_queue_tail(&conn->data_q, skb);
1341 tasklet_schedule(&hdev->tx_task);
1342 }
1343 EXPORT_SYMBOL(hci_send_sco);
1344
1345 /* ---- HCI TX task (outgoing data) ---- */
1346
1347 /* HCI Connection scheduler */
1348 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
1349 {
1350 struct hci_conn_hash *h = &hdev->conn_hash;
1351 struct hci_conn *conn = NULL;
1352 int num = 0, min = ~0;
1353 struct list_head *p;
1354
1355 /* We don't have to lock device here. Connections are always
1356 * added and removed with TX task disabled. */
1357 list_for_each(p, &h->list) {
1358 struct hci_conn *c;
1359 c = list_entry(p, struct hci_conn, list);
1360
1361 if (c->type != type || skb_queue_empty(&c->data_q))
1362 continue;
1363
1364 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
1365 continue;
1366
1367 num++;
1368
1369 if (c->sent < min) {
1370 min = c->sent;
1371 conn = c;
1372 }
1373 }
1374
1375 if (conn) {
1376 int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
1377 int q = cnt / num;
1378 *quote = q ? q : 1;
1379 } else
1380 *quote = 0;
1381
1382 BT_DBG("conn %p quote %d", conn, *quote);
1383 return conn;
1384 }
1385
1386 static inline void hci_acl_tx_to(struct hci_dev *hdev)
1387 {
1388 struct hci_conn_hash *h = &hdev->conn_hash;
1389 struct list_head *p;
1390 struct hci_conn *c;
1391
1392 BT_ERR("%s ACL tx timeout", hdev->name);
1393
1394 /* Kill stalled connections */
1395 list_for_each(p, &h->list) {
1396 c = list_entry(p, struct hci_conn, list);
1397 if (c->type == ACL_LINK && c->sent) {
1398 BT_ERR("%s killing stalled ACL connection %s",
1399 hdev->name, batostr(&c->dst));
1400 hci_acl_disconn(c, 0x13);
1401 }
1402 }
1403 }
1404
1405 static inline void hci_sched_acl(struct hci_dev *hdev)
1406 {
1407 struct hci_conn *conn;
1408 struct sk_buff *skb;
1409 int quote;
1410
1411 BT_DBG("%s", hdev->name);
1412
1413 if (!test_bit(HCI_RAW, &hdev->flags)) {
1414 /* ACL tx timeout must be longer than maximum
1415 * link supervision timeout (40.9 seconds) */
1416 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
1417 hci_acl_tx_to(hdev);
1418 }
1419
1420 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
1421 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1422 BT_DBG("skb %p len %d", skb, skb->len);
1423
1424 hci_conn_enter_active_mode(conn);
1425
1426 hci_send_frame(skb);
1427 hdev->acl_last_tx = jiffies;
1428
1429 hdev->acl_cnt--;
1430 conn->sent++;
1431 }
1432 }
1433 }
1434
1435 /* Schedule SCO */
1436 static inline void hci_sched_sco(struct hci_dev *hdev)
1437 {
1438 struct hci_conn *conn;
1439 struct sk_buff *skb;
1440 int quote;
1441
1442 BT_DBG("%s", hdev->name);
1443
1444 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
1445 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1446 BT_DBG("skb %p len %d", skb, skb->len);
1447 hci_send_frame(skb);
1448
1449 conn->sent++;
1450 if (conn->sent == ~0)
1451 conn->sent = 0;
1452 }
1453 }
1454 }
1455
1456 static inline void hci_sched_esco(struct hci_dev *hdev)
1457 {
1458 struct hci_conn *conn;
1459 struct sk_buff *skb;
1460 int quote;
1461
1462 BT_DBG("%s", hdev->name);
1463
1464 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
1465 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1466 BT_DBG("skb %p len %d", skb, skb->len);
1467 hci_send_frame(skb);
1468
1469 conn->sent++;
1470 if (conn->sent == ~0)
1471 conn->sent = 0;
1472 }
1473 }
1474 }
1475
1476 static void hci_tx_task(unsigned long arg)
1477 {
1478 struct hci_dev *hdev = (struct hci_dev *) arg;
1479 struct sk_buff *skb;
1480
1481 read_lock(&hci_task_lock);
1482
1483 BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
1484
1485 /* Schedule queues and send stuff to HCI driver */
1486
1487 hci_sched_acl(hdev);
1488
1489 hci_sched_sco(hdev);
1490
1491 hci_sched_esco(hdev);
1492
1493 /* Send next queued raw (unknown type) packet */
1494 while ((skb = skb_dequeue(&hdev->raw_q)))
1495 hci_send_frame(skb);
1496
1497 read_unlock(&hci_task_lock);
1498 }
1499
1500 /* ----- HCI RX task (incoming data proccessing) ----- */
1501
1502 /* ACL data packet */
1503 static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1504 {
1505 struct hci_acl_hdr *hdr = (void *) skb->data;
1506 struct hci_conn *conn;
1507 __u16 handle, flags;
1508
1509 skb_pull(skb, HCI_ACL_HDR_SIZE);
1510
1511 handle = __le16_to_cpu(hdr->handle);
1512 flags = hci_flags(handle);
1513 handle = hci_handle(handle);
1514
1515 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
1516
1517 hdev->stat.acl_rx++;
1518
1519 hci_dev_lock(hdev);
1520 conn = hci_conn_hash_lookup_handle(hdev, handle);
1521 hci_dev_unlock(hdev);
1522
1523 if (conn) {
1524 register struct hci_proto *hp;
1525
1526 hci_conn_enter_active_mode(conn);
1527
1528 /* Send to upper protocol */
1529 if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) {
1530 hp->recv_acldata(conn, skb, flags);
1531 return;
1532 }
1533 } else {
1534 BT_ERR("%s ACL packet for unknown connection handle %d",
1535 hdev->name, handle);
1536 }
1537
1538 kfree_skb(skb);
1539 }
1540
1541 /* SCO data packet */
1542 static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1543 {
1544 struct hci_sco_hdr *hdr = (void *) skb->data;
1545 struct hci_conn *conn;
1546 __u16 handle;
1547
1548 skb_pull(skb, HCI_SCO_HDR_SIZE);
1549
1550 handle = __le16_to_cpu(hdr->handle);
1551
1552 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
1553
1554 hdev->stat.sco_rx++;
1555
1556 hci_dev_lock(hdev);
1557 conn = hci_conn_hash_lookup_handle(hdev, handle);
1558 hci_dev_unlock(hdev);
1559
1560 if (conn) {
1561 register struct hci_proto *hp;
1562
1563 /* Send to upper protocol */
1564 if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) {
1565 hp->recv_scodata(conn, skb);
1566 return;
1567 }
1568 } else {
1569 BT_ERR("%s SCO packet for unknown connection handle %d",
1570 hdev->name, handle);
1571 }
1572
1573 kfree_skb(skb);
1574 }
1575
1576 static void hci_rx_task(unsigned long arg)
1577 {
1578 struct hci_dev *hdev = (struct hci_dev *) arg;
1579 struct sk_buff *skb;
1580
1581 BT_DBG("%s", hdev->name);
1582
1583 read_lock(&hci_task_lock);
1584
1585 while ((skb = skb_dequeue(&hdev->rx_q))) {
1586 if (atomic_read(&hdev->promisc)) {
1587 /* Send copy to the sockets */
1588 hci_send_to_sock(hdev, skb);
1589 }
1590
1591 if (test_bit(HCI_RAW, &hdev->flags)) {
1592 kfree_skb(skb);
1593 continue;
1594 }
1595
1596 if (test_bit(HCI_INIT, &hdev->flags)) {
1597 /* Don't process data packets in this states. */
1598 switch (bt_cb(skb)->pkt_type) {
1599 case HCI_ACLDATA_PKT:
1600 case HCI_SCODATA_PKT:
1601 kfree_skb(skb);
1602 continue;
1603 }
1604 }
1605
1606 /* Process frame */
1607 switch (bt_cb(skb)->pkt_type) {
1608 case HCI_EVENT_PKT:
1609 hci_event_packet(hdev, skb);
1610 break;
1611
1612 case HCI_ACLDATA_PKT:
1613 BT_DBG("%s ACL data packet", hdev->name);
1614 hci_acldata_packet(hdev, skb);
1615 break;
1616
1617 case HCI_SCODATA_PKT:
1618 BT_DBG("%s SCO data packet", hdev->name);
1619 hci_scodata_packet(hdev, skb);
1620 break;
1621
1622 default:
1623 kfree_skb(skb);
1624 break;
1625 }
1626 }
1627
1628 read_unlock(&hci_task_lock);
1629 }
1630
1631 static void hci_cmd_task(unsigned long arg)
1632 {
1633 struct hci_dev *hdev = (struct hci_dev *) arg;
1634 struct sk_buff *skb;
1635
1636 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
1637
1638 if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
1639 BT_ERR("%s command tx timeout", hdev->name);
1640 atomic_set(&hdev->cmd_cnt, 1);
1641 }
1642
1643 /* Send queued commands */
1644 if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) {
1645 kfree_skb(hdev->sent_cmd);
1646
1647 if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) {
1648 atomic_dec(&hdev->cmd_cnt);
1649 hci_send_frame(skb);
1650 hdev->cmd_last_tx = jiffies;
1651 } else {
1652 skb_queue_head(&hdev->cmd_q, skb);
1653 tasklet_schedule(&hdev->cmd_task);
1654 }
1655 }
1656 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree