?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
btrfs: clear __GFP_FS flag in the space cache inode
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / bluetooth / hci_core.c
blob9c4541bc488ab9b2a74dda2809929f842b9b97e6
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 <linux/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, __u16 cmd, int result)
95 {
96 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
97
98 /* If the request has set req_last_cmd (typical for multi-HCI
99 * command requests) check if the completed command matches
100 * this, and if not just return. Single HCI command requests
101 * typically leave req_last_cmd as 0 */
102 if (hdev->req_last_cmd && cmd != hdev->req_last_cmd)
103 return;
104
105 if (hdev->req_status == HCI_REQ_PEND) {
106 hdev->req_result = result;
107 hdev->req_status = HCI_REQ_DONE;
108 wake_up_interruptible(&hdev->req_wait_q);
109 }
110 }
111
112 static void hci_req_cancel(struct hci_dev *hdev, int err)
113 {
114 BT_DBG("%s err 0x%2.2x", hdev->name, err);
115
116 if (hdev->req_status == HCI_REQ_PEND) {
117 hdev->req_result = err;
118 hdev->req_status = HCI_REQ_CANCELED;
119 wake_up_interruptible(&hdev->req_wait_q);
120 }
121 }
122
123 /* Execute request and wait for completion. */
124 static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
125 unsigned long opt, __u32 timeout)
126 {
127 DECLARE_WAITQUEUE(wait, current);
128 int err = 0;
129
130 BT_DBG("%s start", hdev->name);
131
132 hdev->req_status = HCI_REQ_PEND;
133
134 add_wait_queue(&hdev->req_wait_q, &wait);
135 set_current_state(TASK_INTERRUPTIBLE);
136
137 req(hdev, opt);
138 schedule_timeout(timeout);
139
140 remove_wait_queue(&hdev->req_wait_q, &wait);
141
142 if (signal_pending(current))
143 return -EINTR;
144
145 switch (hdev->req_status) {
146 case HCI_REQ_DONE:
147 err = -bt_err(hdev->req_result);
148 break;
149
150 case HCI_REQ_CANCELED:
151 err = -hdev->req_result;
152 break;
153
154 default:
155 err = -ETIMEDOUT;
156 break;
157 }
158
159 hdev->req_last_cmd = hdev->req_status = hdev->req_result = 0;
160
161 BT_DBG("%s end: err %d", hdev->name, err);
162
163 return err;
164 }
165
166 static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
167 unsigned long opt, __u32 timeout)
168 {
169 int ret;
170
171 if (!test_bit(HCI_UP, &hdev->flags))
172 return -ENETDOWN;
173
174 /* Serialize all requests */
175 hci_req_lock(hdev);
176 ret = __hci_request(hdev, req, opt, timeout);
177 hci_req_unlock(hdev);
178
179 return ret;
180 }
181
182 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
183 {
184 BT_DBG("%s %ld", hdev->name, opt);
185
186 /* Reset device */
187 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
188 }
189
190 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
191 {
192 struct sk_buff *skb;
193 __le16 param;
194 __u8 flt_type;
195
196 BT_DBG("%s %ld", hdev->name, opt);
197
198 /* Driver initialization */
199
200 /* Special commands */
201 while ((skb = skb_dequeue(&hdev->driver_init))) {
202 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
203 skb->dev = (void *) hdev;
204
205 skb_queue_tail(&hdev->cmd_q, skb);
206 tasklet_schedule(&hdev->cmd_task);
207 }
208 skb_queue_purge(&hdev->driver_init);
209
210 /* Mandatory initialization */
211
212 /* Reset */
213 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks))
214 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
215
216 /* Read Local Supported Features */
217 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
218
219 /* Read Local Version */
220 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
221
222 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
223 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
224
225 #if 0
226 /* Host buffer size */
227 {
228 struct hci_cp_host_buffer_size cp;
229 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
230 cp.sco_mtu = HCI_MAX_SCO_SIZE;
231 cp.acl_max_pkt = cpu_to_le16(0xffff);
232 cp.sco_max_pkt = cpu_to_le16(0xffff);
233 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
234 }
235 #endif
236
237 /* Read BD Address */
238 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
239
240 /* Read Class of Device */
241 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
242
243 /* Read Local Name */
244 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
245
246 /* Read Voice Setting */
247 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
248
249 /* Optional initialization */
250
251 /* Clear Event Filters */
252 flt_type = HCI_FLT_CLEAR_ALL;
253 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
254
255 /* Page timeout ~20 secs */
256 param = cpu_to_le16(0x8000);
257 hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, &param);
258
259 /* Connection accept timeout ~20 secs */
260 param = cpu_to_le16(0x7d00);
261 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
262
263 hdev->req_last_cmd = HCI_OP_WRITE_CA_TIMEOUT;
264 }
265
266 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
267 {
268 __u8 scan = opt;
269
270 BT_DBG("%s %x", hdev->name, scan);
271
272 /* Inquiry and Page scans */
273 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
274 }
275
276 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
277 {
278 __u8 auth = opt;
279
280 BT_DBG("%s %x", hdev->name, auth);
281
282 /* Authentication */
283 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
284 }
285
286 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
287 {
288 __u8 encrypt = opt;
289
290 BT_DBG("%s %x", hdev->name, encrypt);
291
292 /* Encryption */
293 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
294 }
295
296 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
297 {
298 __le16 policy = cpu_to_le16(opt);
299
300 BT_DBG("%s %x", hdev->name, policy);
301
302 /* Default link policy */
303 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
304 }
305
306 /* Get HCI device by index.
307 * Device is held on return. */
308 struct hci_dev *hci_dev_get(int index)
309 {
310 struct hci_dev *hdev = NULL;
311 struct list_head *p;
312
313 BT_DBG("%d", index);
314
315 if (index < 0)
316 return NULL;
317
318 read_lock(&hci_dev_list_lock);
319 list_for_each(p, &hci_dev_list) {
320 struct hci_dev *d = list_entry(p, struct hci_dev, list);
321 if (d->id == index) {
322 hdev = hci_dev_hold(d);
323 break;
324 }
325 }
326 read_unlock(&hci_dev_list_lock);
327 return hdev;
328 }
329
330 /* ---- Inquiry support ---- */
331 static void inquiry_cache_flush(struct hci_dev *hdev)
332 {
333 struct inquiry_cache *cache = &hdev->inq_cache;
334 struct inquiry_entry *next = cache->list, *e;
335
336 BT_DBG("cache %p", cache);
337
338 cache->list = NULL;
339 while ((e = next)) {
340 next = e->next;
341 kfree(e);
342 }
343 }
344
345 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
346 {
347 struct inquiry_cache *cache = &hdev->inq_cache;
348 struct inquiry_entry *e;
349
350 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
351
352 for (e = cache->list; e; e = e->next)
353 if (!bacmp(&e->data.bdaddr, bdaddr))
354 break;
355 return e;
356 }
357
358 void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
359 {
360 struct inquiry_cache *cache = &hdev->inq_cache;
361 struct inquiry_entry *ie;
362
363 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
364
365 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
366 if (!ie) {
367 /* Entry not in the cache. Add new one. */
368 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
369 if (!ie)
370 return;
371
372 ie->next = cache->list;
373 cache->list = ie;
374 }
375
376 memcpy(&ie->data, data, sizeof(*data));
377 ie->timestamp = jiffies;
378 cache->timestamp = jiffies;
379 }
380
381 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
382 {
383 struct inquiry_cache *cache = &hdev->inq_cache;
384 struct inquiry_info *info = (struct inquiry_info *) buf;
385 struct inquiry_entry *e;
386 int copied = 0;
387
388 for (e = cache->list; e && copied < num; e = e->next, copied++) {
389 struct inquiry_data *data = &e->data;
390 bacpy(&info->bdaddr, &data->bdaddr);
391 info->pscan_rep_mode = data->pscan_rep_mode;
392 info->pscan_period_mode = data->pscan_period_mode;
393 info->pscan_mode = data->pscan_mode;
394 memcpy(info->dev_class, data->dev_class, 3);
395 info->clock_offset = data->clock_offset;
396 info++;
397 }
398
399 BT_DBG("cache %p, copied %d", cache, copied);
400 return copied;
401 }
402
403 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
404 {
405 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
406 struct hci_cp_inquiry cp;
407
408 BT_DBG("%s", hdev->name);
409
410 if (test_bit(HCI_INQUIRY, &hdev->flags))
411 return;
412
413 /* Start Inquiry */
414 memcpy(&cp.lap, &ir->lap, 3);
415 cp.length = ir->length;
416 cp.num_rsp = ir->num_rsp;
417 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
418 }
419
420 int hci_inquiry(void __user *arg)
421 {
422 __u8 __user *ptr = arg;
423 struct hci_inquiry_req ir;
424 struct hci_dev *hdev;
425 int err = 0, do_inquiry = 0, max_rsp;
426 long timeo;
427 __u8 *buf;
428
429 if (copy_from_user(&ir, ptr, sizeof(ir)))
430 return -EFAULT;
431
432 if (!(hdev = hci_dev_get(ir.dev_id)))
433 return -ENODEV;
434
435 hci_dev_lock_bh(hdev);
436 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
437 inquiry_cache_empty(hdev) ||
438 ir.flags & IREQ_CACHE_FLUSH) {
439 inquiry_cache_flush(hdev);
440 do_inquiry = 1;
441 }
442 hci_dev_unlock_bh(hdev);
443
444 timeo = ir.length * msecs_to_jiffies(2000);
445
446 if (do_inquiry) {
447 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
448 if (err < 0)
449 goto done;
450 }
451
452 /* for unlimited number of responses we will use buffer with 255 entries */
453 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
454
455 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
456 * copy it to the user space.
457 */
458 buf = kmalloc(sizeof(struct inquiry_info) *max_rsp, GFP_KERNEL);
459 if (!buf) {
460 err = -ENOMEM;
461 goto done;
462 }
463
464 hci_dev_lock_bh(hdev);
465 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
466 hci_dev_unlock_bh(hdev);
467
468 BT_DBG("num_rsp %d", ir.num_rsp);
469
470 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
471 ptr += sizeof(ir);
472 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
473 ir.num_rsp))
474 err = -EFAULT;
475 } else
476 err = -EFAULT;
477
478 kfree(buf);
479
480 done:
481 hci_dev_put(hdev);
482 return err;
483 }
484
485 /* ---- HCI ioctl helpers ---- */
486
487 int hci_dev_open(__u16 dev)
488 {
489 struct hci_dev *hdev;
490 int ret = 0;
491
492 if (!(hdev = hci_dev_get(dev)))
493 return -ENODEV;
494
495 BT_DBG("%s %p", hdev->name, hdev);
496
497 hci_req_lock(hdev);
498
499 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
500 ret = -ERFKILL;
501 goto done;
502 }
503
504 if (test_bit(HCI_UP, &hdev->flags)) {
505 ret = -EALREADY;
506 goto done;
507 }
508
509 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
510 set_bit(HCI_RAW, &hdev->flags);
511
512 /* Treat all non BR/EDR controllers as raw devices for now */
513 if (hdev->dev_type != HCI_BREDR)
514 set_bit(HCI_RAW, &hdev->flags);
515
516 if (hdev->open(hdev)) {
517 ret = -EIO;
518 goto done;
519 }
520
521 if (!test_bit(HCI_RAW, &hdev->flags)) {
522 atomic_set(&hdev->cmd_cnt, 1);
523 set_bit(HCI_INIT, &hdev->flags);
524
525 //__hci_request(hdev, hci_reset_req, 0, HZ);
526 ret = __hci_request(hdev, hci_init_req, 0,
527 msecs_to_jiffies(HCI_INIT_TIMEOUT));
528
529 clear_bit(HCI_INIT, &hdev->flags);
530 }
531
532 if (!ret) {
533 hci_dev_hold(hdev);
534 set_bit(HCI_UP, &hdev->flags);
535 hci_notify(hdev, HCI_DEV_UP);
536 } else {
537 /* Init failed, cleanup */
538 tasklet_kill(&hdev->rx_task);
539 tasklet_kill(&hdev->tx_task);
540 tasklet_kill(&hdev->cmd_task);
541
542 skb_queue_purge(&hdev->cmd_q);
543 skb_queue_purge(&hdev->rx_q);
544
545 if (hdev->flush)
546 hdev->flush(hdev);
547
548 if (hdev->sent_cmd) {
549 kfree_skb(hdev->sent_cmd);
550 hdev->sent_cmd = NULL;
551 }
552
553 hdev->close(hdev);
554 hdev->flags = 0;
555 }
556
557 done:
558 hci_req_unlock(hdev);
559 hci_dev_put(hdev);
560 return ret;
561 }
562
563 static int hci_dev_do_close(struct hci_dev *hdev)
564 {
565 BT_DBG("%s %p", hdev->name, hdev);
566
567 hci_req_cancel(hdev, ENODEV);
568 hci_req_lock(hdev);
569
570 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
571 hci_req_unlock(hdev);
572 return 0;
573 }
574
575 /* Kill RX and TX tasks */
576 tasklet_kill(&hdev->rx_task);
577 tasklet_kill(&hdev->tx_task);
578
579 hci_dev_lock_bh(hdev);
580 inquiry_cache_flush(hdev);
581 hci_conn_hash_flush(hdev);
582 hci_dev_unlock_bh(hdev);
583
584 hci_notify(hdev, HCI_DEV_DOWN);
585
586 if (hdev->flush)
587 hdev->flush(hdev);
588
589 /* Reset device */
590 skb_queue_purge(&hdev->cmd_q);
591 atomic_set(&hdev->cmd_cnt, 1);
592 if (!test_bit(HCI_RAW, &hdev->flags)) {
593 set_bit(HCI_INIT, &hdev->flags);
594 __hci_request(hdev, hci_reset_req, 0,
595 msecs_to_jiffies(250));
596 clear_bit(HCI_INIT, &hdev->flags);
597 }
598
599 /* Kill cmd task */
600 tasklet_kill(&hdev->cmd_task);
601
602 /* Drop queues */
603 skb_queue_purge(&hdev->rx_q);
604 skb_queue_purge(&hdev->cmd_q);
605 skb_queue_purge(&hdev->raw_q);
606
607 /* Drop last sent command */
608 if (hdev->sent_cmd) {
609 kfree_skb(hdev->sent_cmd);
610 hdev->sent_cmd = NULL;
611 }
612
613 /* After this point our queues are empty
614 * and no tasks are scheduled. */
615 hdev->close(hdev);
616
617 /* Clear flags */
618 hdev->flags = 0;
619
620 hci_req_unlock(hdev);
621
622 hci_dev_put(hdev);
623 return 0;
624 }
625
626 int hci_dev_close(__u16 dev)
627 {
628 struct hci_dev *hdev;
629 int err;
630
631 hdev = hci_dev_get(dev);
632 if (!hdev)
633 return -ENODEV;
634 err = hci_dev_do_close(hdev);
635 hci_dev_put(hdev);
636 return err;
637 }
638
639 int hci_dev_reset(__u16 dev)
640 {
641 struct hci_dev *hdev;
642 int ret = 0;
643
644 hdev = hci_dev_get(dev);
645 if (!hdev)
646 return -ENODEV;
647
648 hci_req_lock(hdev);
649 tasklet_disable(&hdev->tx_task);
650
651 if (!test_bit(HCI_UP, &hdev->flags))
652 goto done;
653
654 /* Drop queues */
655 skb_queue_purge(&hdev->rx_q);
656 skb_queue_purge(&hdev->cmd_q);
657
658 hci_dev_lock_bh(hdev);
659 inquiry_cache_flush(hdev);
660 hci_conn_hash_flush(hdev);
661 hci_dev_unlock_bh(hdev);
662
663 if (hdev->flush)
664 hdev->flush(hdev);
665
666 atomic_set(&hdev->cmd_cnt, 1);
667 hdev->acl_cnt = 0; hdev->sco_cnt = 0;
668
669 if (!test_bit(HCI_RAW, &hdev->flags))
670 ret = __hci_request(hdev, hci_reset_req, 0,
671 msecs_to_jiffies(HCI_INIT_TIMEOUT));
672
673 done:
674 tasklet_enable(&hdev->tx_task);
675 hci_req_unlock(hdev);
676 hci_dev_put(hdev);
677 return ret;
678 }
679
680 int hci_dev_reset_stat(__u16 dev)
681 {
682 struct hci_dev *hdev;
683 int ret = 0;
684
685 hdev = hci_dev_get(dev);
686 if (!hdev)
687 return -ENODEV;
688
689 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
690
691 hci_dev_put(hdev);
692
693 return ret;
694 }
695
696 int hci_dev_cmd(unsigned int cmd, void __user *arg)
697 {
698 struct hci_dev *hdev;
699 struct hci_dev_req dr;
700 int err = 0;
701
702 if (copy_from_user(&dr, arg, sizeof(dr)))
703 return -EFAULT;
704
705 hdev = hci_dev_get(dr.dev_id);
706 if (!hdev)
707 return -ENODEV;
708
709 switch (cmd) {
710 case HCISETAUTH:
711 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
712 msecs_to_jiffies(HCI_INIT_TIMEOUT));
713 break;
714
715 case HCISETENCRYPT:
716 if (!lmp_encrypt_capable(hdev)) {
717 err = -EOPNOTSUPP;
718 break;
719 }
720
721 if (!test_bit(HCI_AUTH, &hdev->flags)) {
722 /* Auth must be enabled first */
723 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
724 msecs_to_jiffies(HCI_INIT_TIMEOUT));
725 if (err)
726 break;
727 }
728
729 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
730 msecs_to_jiffies(HCI_INIT_TIMEOUT));
731 break;
732
733 case HCISETSCAN:
734 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
735 msecs_to_jiffies(HCI_INIT_TIMEOUT));
736 break;
737
738 case HCISETLINKPOL:
739 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
740 msecs_to_jiffies(HCI_INIT_TIMEOUT));
741 break;
742
743 case HCISETLINKMODE:
744 hdev->link_mode = ((__u16) dr.dev_opt) &
745 (HCI_LM_MASTER | HCI_LM_ACCEPT);
746 break;
747
748 case HCISETPTYPE:
749 hdev->pkt_type = (__u16) dr.dev_opt;
750 break;
751
752 case HCISETACLMTU:
753 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
754 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
755 break;
756
757 case HCISETSCOMTU:
758 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
759 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
760 break;
761
762 default:
763 err = -EINVAL;
764 break;
765 }
766
767 hci_dev_put(hdev);
768 return err;
769 }
770
771 int hci_get_dev_list(void __user *arg)
772 {
773 struct hci_dev_list_req *dl;
774 struct hci_dev_req *dr;
775 struct list_head *p;
776 int n = 0, size, err;
777 __u16 dev_num;
778
779 if (get_user(dev_num, (__u16 __user *) arg))
780 return -EFAULT;
781
782 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
783 return -EINVAL;
784
785 size = sizeof(*dl) + dev_num * sizeof(*dr);
786
787 dl = kzalloc(size, GFP_KERNEL);
788 if (!dl)
789 return -ENOMEM;
790
791 dr = dl->dev_req;
792
793 read_lock_bh(&hci_dev_list_lock);
794 list_for_each(p, &hci_dev_list) {
795 struct hci_dev *hdev;
796 hdev = list_entry(p, struct hci_dev, list);
797 (dr + n)->dev_id = hdev->id;
798 (dr + n)->dev_opt = hdev->flags;
799 if (++n >= dev_num)
800 break;
801 }
802 read_unlock_bh(&hci_dev_list_lock);
803
804 dl->dev_num = n;
805 size = sizeof(*dl) + n * sizeof(*dr);
806
807 err = copy_to_user(arg, dl, size);
808 kfree(dl);
809
810 return err ? -EFAULT : 0;
811 }
812
813 int hci_get_dev_info(void __user *arg)
814 {
815 struct hci_dev *hdev;
816 struct hci_dev_info di;
817 int err = 0;
818
819 if (copy_from_user(&di, arg, sizeof(di)))
820 return -EFAULT;
821
822 hdev = hci_dev_get(di.dev_id);
823 if (!hdev)
824 return -ENODEV;
825
826 strcpy(di.name, hdev->name);
827 di.bdaddr = hdev->bdaddr;
828 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
829 di.flags = hdev->flags;
830 di.pkt_type = hdev->pkt_type;
831 di.acl_mtu = hdev->acl_mtu;
832 di.acl_pkts = hdev->acl_pkts;
833 di.sco_mtu = hdev->sco_mtu;
834 di.sco_pkts = hdev->sco_pkts;
835 di.link_policy = hdev->link_policy;
836 di.link_mode = hdev->link_mode;
837
838 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
839 memcpy(&di.features, &hdev->features, sizeof(di.features));
840
841 if (copy_to_user(arg, &di, sizeof(di)))
842 err = -EFAULT;
843
844 hci_dev_put(hdev);
845
846 return err;
847 }
848
849 /* ---- Interface to HCI drivers ---- */
850
851 static int hci_rfkill_set_block(void *data, bool blocked)
852 {
853 struct hci_dev *hdev = data;
854
855 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
856
857 if (!blocked)
858 return 0;
859
860 hci_dev_do_close(hdev);
861
862 return 0;
863 }
864
865 static const struct rfkill_ops hci_rfkill_ops = {
866 .set_block = hci_rfkill_set_block,
867 };
868
869 /* Alloc HCI device */
870 struct hci_dev *hci_alloc_dev(void)
871 {
872 struct hci_dev *hdev;
873
874 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
875 if (!hdev)
876 return NULL;
877
878 skb_queue_head_init(&hdev->driver_init);
879
880 return hdev;
881 }
882 EXPORT_SYMBOL(hci_alloc_dev);
883
884 /* Free HCI device */
885 void hci_free_dev(struct hci_dev *hdev)
886 {
887 skb_queue_purge(&hdev->driver_init);
888
889 /* will free via device release */
890 put_device(&hdev->dev);
891 }
892 EXPORT_SYMBOL(hci_free_dev);
893
894 /* Register HCI device */
895 int hci_register_dev(struct hci_dev *hdev)
896 {
897 struct list_head *head = &hci_dev_list, *p;
898 int i, id = 0;
899
900 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
901 hdev->bus, hdev->owner);
902
903 if (!hdev->open || !hdev->close || !hdev->destruct)
904 return -EINVAL;
905
906 write_lock_bh(&hci_dev_list_lock);
907
908 /* Find first available device id */
909 list_for_each(p, &hci_dev_list) {
910 if (list_entry(p, struct hci_dev, list)->id != id)
911 break;
912 head = p; id++;
913 }
914
915 sprintf(hdev->name, "hci%d", id);
916 hdev->id = id;
917 list_add(&hdev->list, head);
918
919 atomic_set(&hdev->refcnt, 1);
920 spin_lock_init(&hdev->lock);
921
922 hdev->flags = 0;
923 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
924 hdev->esco_type = (ESCO_HV1);
925 hdev->link_mode = (HCI_LM_ACCEPT);
926
927 hdev->idle_timeout = 0;
928 hdev->sniff_max_interval = 800;
929 hdev->sniff_min_interval = 80;
930
931 tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev);
932 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
933 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
934
935 skb_queue_head_init(&hdev->rx_q);
936 skb_queue_head_init(&hdev->cmd_q);
937 skb_queue_head_init(&hdev->raw_q);
938
939 for (i = 0; i < NUM_REASSEMBLY; i++)
940 hdev->reassembly[i] = NULL;
941
942 init_waitqueue_head(&hdev->req_wait_q);
943 mutex_init(&hdev->req_lock);
944
945 inquiry_cache_init(hdev);
946
947 hci_conn_hash_init(hdev);
948
949 INIT_LIST_HEAD(&hdev->blacklist);
950
951 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
952
953 atomic_set(&hdev->promisc, 0);
954
955 write_unlock_bh(&hci_dev_list_lock);
956
957 hdev->workqueue = create_singlethread_workqueue(hdev->name);
958 if (!hdev->workqueue)
959 goto nomem;
960
961 hci_register_sysfs(hdev);
962
963 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
964 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
965 if (hdev->rfkill) {
966 if (rfkill_register(hdev->rfkill) < 0) {
967 rfkill_destroy(hdev->rfkill);
968 hdev->rfkill = NULL;
969 }
970 }
971
972 mgmt_index_added(hdev->id);
973 hci_notify(hdev, HCI_DEV_REG);
974
975 return id;
976
977 nomem:
978 write_lock_bh(&hci_dev_list_lock);
979 list_del(&hdev->list);
980 write_unlock_bh(&hci_dev_list_lock);
981
982 return -ENOMEM;
983 }
984 EXPORT_SYMBOL(hci_register_dev);
985
986 /* Unregister HCI device */
987 int hci_unregister_dev(struct hci_dev *hdev)
988 {
989 int i;
990
991 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
992
993 write_lock_bh(&hci_dev_list_lock);
994 list_del(&hdev->list);
995 write_unlock_bh(&hci_dev_list_lock);
996
997 hci_dev_do_close(hdev);
998
999 for (i = 0; i < NUM_REASSEMBLY; i++)
1000 kfree_skb(hdev->reassembly[i]);
1001
1002 mgmt_index_removed(hdev->id);
1003 hci_notify(hdev, HCI_DEV_UNREG);
1004
1005 if (hdev->rfkill) {
1006 rfkill_unregister(hdev->rfkill);
1007 rfkill_destroy(hdev->rfkill);
1008 }
1009
1010 hci_unregister_sysfs(hdev);
1011
1012 destroy_workqueue(hdev->workqueue);
1013
1014 hci_dev_lock_bh(hdev);
1015 hci_blacklist_clear(hdev);
1016 hci_dev_unlock_bh(hdev);
1017
1018 __hci_dev_put(hdev);
1019
1020 return 0;
1021 }
1022 EXPORT_SYMBOL(hci_unregister_dev);
1023
1024 /* Suspend HCI device */
1025 int hci_suspend_dev(struct hci_dev *hdev)
1026 {
1027 hci_notify(hdev, HCI_DEV_SUSPEND);
1028 return 0;
1029 }
1030 EXPORT_SYMBOL(hci_suspend_dev);
1031
1032 /* Resume HCI device */
1033 int hci_resume_dev(struct hci_dev *hdev)
1034 {
1035 hci_notify(hdev, HCI_DEV_RESUME);
1036 return 0;
1037 }
1038 EXPORT_SYMBOL(hci_resume_dev);
1039
1040 /* Receive frame from HCI drivers */
1041 int hci_recv_frame(struct sk_buff *skb)
1042 {
1043 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1044 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1045 && !test_bit(HCI_INIT, &hdev->flags))) {
1046 kfree_skb(skb);
1047 return -ENXIO;
1048 }
1049
1050 /* Incomming skb */
1051 bt_cb(skb)->incoming = 1;
1052
1053 /* Time stamp */
1054 __net_timestamp(skb);
1055
1056 /* Queue frame for rx task */
1057 skb_queue_tail(&hdev->rx_q, skb);
1058 tasklet_schedule(&hdev->rx_task);
1059
1060 return 0;
1061 }
1062 EXPORT_SYMBOL(hci_recv_frame);
1063
1064 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1065 int count, __u8 index, gfp_t gfp_mask)
1066 {
1067 int len = 0;
1068 int hlen = 0;
1069 int remain = count;
1070 struct sk_buff *skb;
1071 struct bt_skb_cb *scb;
1072
1073 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1074 index >= NUM_REASSEMBLY)
1075 return -EILSEQ;
1076
1077 skb = hdev->reassembly[index];
1078
1079 if (!skb) {
1080 switch (type) {
1081 case HCI_ACLDATA_PKT:
1082 len = HCI_MAX_FRAME_SIZE;
1083 hlen = HCI_ACL_HDR_SIZE;
1084 break;
1085 case HCI_EVENT_PKT:
1086 len = HCI_MAX_EVENT_SIZE;
1087 hlen = HCI_EVENT_HDR_SIZE;
1088 break;
1089 case HCI_SCODATA_PKT:
1090 len = HCI_MAX_SCO_SIZE;
1091 hlen = HCI_SCO_HDR_SIZE;
1092 break;
1093 }
1094
1095 skb = bt_skb_alloc(len, gfp_mask);
1096 if (!skb)
1097 return -ENOMEM;
1098
1099 scb = (void *) skb->cb;
1100 scb->expect = hlen;
1101 scb->pkt_type = type;
1102
1103 skb->dev = (void *) hdev;
1104 hdev->reassembly[index] = skb;
1105 }
1106
1107 while (count) {
1108 scb = (void *) skb->cb;
1109 len = min(scb->expect, (__u16)count);
1110
1111 memcpy(skb_put(skb, len), data, len);
1112
1113 count -= len;
1114 data += len;
1115 scb->expect -= len;
1116 remain = count;
1117
1118 switch (type) {
1119 case HCI_EVENT_PKT:
1120 if (skb->len == HCI_EVENT_HDR_SIZE) {
1121 struct hci_event_hdr *h = hci_event_hdr(skb);
1122 scb->expect = h->plen;
1123
1124 if (skb_tailroom(skb) < scb->expect) {
1125 kfree_skb(skb);
1126 hdev->reassembly[index] = NULL;
1127 return -ENOMEM;
1128 }
1129 }
1130 break;
1131
1132 case HCI_ACLDATA_PKT:
1133 if (skb->len == HCI_ACL_HDR_SIZE) {
1134 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1135 scb->expect = __le16_to_cpu(h->dlen);
1136
1137 if (skb_tailroom(skb) < scb->expect) {
1138 kfree_skb(skb);
1139 hdev->reassembly[index] = NULL;
1140 return -ENOMEM;
1141 }
1142 }
1143 break;
1144
1145 case HCI_SCODATA_PKT:
1146 if (skb->len == HCI_SCO_HDR_SIZE) {
1147 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1148 scb->expect = h->dlen;
1149
1150 if (skb_tailroom(skb) < scb->expect) {
1151 kfree_skb(skb);
1152 hdev->reassembly[index] = NULL;
1153 return -ENOMEM;
1154 }
1155 }
1156 break;
1157 }
1158
1159 if (scb->expect == 0) {
1160 /* Complete frame */
1161
1162 bt_cb(skb)->pkt_type = type;
1163 hci_recv_frame(skb);
1164
1165 hdev->reassembly[index] = NULL;
1166 return remain;
1167 }
1168 }
1169
1170 return remain;
1171 }
1172
1173 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1174 {
1175 int rem = 0;
1176
1177 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1178 return -EILSEQ;
1179
1180 while (count) {
1181 rem = hci_reassembly(hdev, type, data, count,
1182 type - 1, GFP_ATOMIC);
1183 if (rem < 0)
1184 return rem;
1185
1186 data += (count - rem);
1187 count = rem;
1188 };
1189
1190 return rem;
1191 }
1192 EXPORT_SYMBOL(hci_recv_fragment);
1193
1194 #define STREAM_REASSEMBLY 0
1195
1196 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1197 {
1198 int type;
1199 int rem = 0;
1200
1201 while (count) {
1202 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1203
1204 if (!skb) {
1205 struct { char type; } *pkt;
1206
1207 /* Start of the frame */
1208 pkt = data;
1209 type = pkt->type;
1210
1211 data++;
1212 count--;
1213 } else
1214 type = bt_cb(skb)->pkt_type;
1215
1216 rem = hci_reassembly(hdev, type, data,
1217 count, STREAM_REASSEMBLY, GFP_ATOMIC);
1218 if (rem < 0)
1219 return rem;
1220
1221 data += (count - rem);
1222 count = rem;
1223 };
1224
1225 return rem;
1226 }
1227 EXPORT_SYMBOL(hci_recv_stream_fragment);
1228
1229 /* ---- Interface to upper protocols ---- */
1230
1231 /* Register/Unregister protocols.
1232 * hci_task_lock is used to ensure that no tasks are running. */
1233 int hci_register_proto(struct hci_proto *hp)
1234 {
1235 int err = 0;
1236
1237 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1238
1239 if (hp->id >= HCI_MAX_PROTO)
1240 return -EINVAL;
1241
1242 write_lock_bh(&hci_task_lock);
1243
1244 if (!hci_proto[hp->id])
1245 hci_proto[hp->id] = hp;
1246 else
1247 err = -EEXIST;
1248
1249 write_unlock_bh(&hci_task_lock);
1250
1251 return err;
1252 }
1253 EXPORT_SYMBOL(hci_register_proto);
1254
1255 int hci_unregister_proto(struct hci_proto *hp)
1256 {
1257 int err = 0;
1258
1259 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1260
1261 if (hp->id >= HCI_MAX_PROTO)
1262 return -EINVAL;
1263
1264 write_lock_bh(&hci_task_lock);
1265
1266 if (hci_proto[hp->id])
1267 hci_proto[hp->id] = NULL;
1268 else
1269 err = -ENOENT;
1270
1271 write_unlock_bh(&hci_task_lock);
1272
1273 return err;
1274 }
1275 EXPORT_SYMBOL(hci_unregister_proto);
1276
1277 int hci_register_cb(struct hci_cb *cb)
1278 {
1279 BT_DBG("%p name %s", cb, cb->name);
1280
1281 write_lock_bh(&hci_cb_list_lock);
1282 list_add(&cb->list, &hci_cb_list);
1283 write_unlock_bh(&hci_cb_list_lock);
1284
1285 return 0;
1286 }
1287 EXPORT_SYMBOL(hci_register_cb);
1288
1289 int hci_unregister_cb(struct hci_cb *cb)
1290 {
1291 BT_DBG("%p name %s", cb, cb->name);
1292
1293 write_lock_bh(&hci_cb_list_lock);
1294 list_del(&cb->list);
1295 write_unlock_bh(&hci_cb_list_lock);
1296
1297 return 0;
1298 }
1299 EXPORT_SYMBOL(hci_unregister_cb);
1300
1301 static int hci_send_frame(struct sk_buff *skb)
1302 {
1303 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1304
1305 if (!hdev) {
1306 kfree_skb(skb);
1307 return -ENODEV;
1308 }
1309
1310 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1311
1312 if (atomic_read(&hdev->promisc)) {
1313 /* Time stamp */
1314 __net_timestamp(skb);
1315
1316 hci_send_to_sock(hdev, skb);
1317 }
1318
1319 /* Get rid of skb owner, prior to sending to the driver. */
1320 skb_orphan(skb);
1321
1322 return hdev->send(skb);
1323 }
1324
1325 /* Send HCI command */
1326 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1327 {
1328 int len = HCI_COMMAND_HDR_SIZE + plen;
1329 struct hci_command_hdr *hdr;
1330 struct sk_buff *skb;
1331
1332 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1333
1334 skb = bt_skb_alloc(len, GFP_ATOMIC);
1335 if (!skb) {
1336 BT_ERR("%s no memory for command", hdev->name);
1337 return -ENOMEM;
1338 }
1339
1340 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
1341 hdr->opcode = cpu_to_le16(opcode);
1342 hdr->plen = plen;
1343
1344 if (plen)
1345 memcpy(skb_put(skb, plen), param, plen);
1346
1347 BT_DBG("skb len %d", skb->len);
1348
1349 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1350 skb->dev = (void *) hdev;
1351
1352 skb_queue_tail(&hdev->cmd_q, skb);
1353 tasklet_schedule(&hdev->cmd_task);
1354
1355 return 0;
1356 }
1357
1358 /* Get data from the previously sent command */
1359 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1360 {
1361 struct hci_command_hdr *hdr;
1362
1363 if (!hdev->sent_cmd)
1364 return NULL;
1365
1366 hdr = (void *) hdev->sent_cmd->data;
1367
1368 if (hdr->opcode != cpu_to_le16(opcode))
1369 return NULL;
1370
1371 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1372
1373 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1374 }
1375
1376 /* Send ACL data */
1377 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1378 {
1379 struct hci_acl_hdr *hdr;
1380 int len = skb->len;
1381
1382 skb_push(skb, HCI_ACL_HDR_SIZE);
1383 skb_reset_transport_header(skb);
1384 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
1385 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1386 hdr->dlen = cpu_to_le16(len);
1387 }
1388
1389 void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1390 {
1391 struct hci_dev *hdev = conn->hdev;
1392 struct sk_buff *list;
1393
1394 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1395
1396 skb->dev = (void *) hdev;
1397 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1398 hci_add_acl_hdr(skb, conn->handle, flags | ACL_START);
1399
1400 list = skb_shinfo(skb)->frag_list;
1401 if (!list) {
1402 /* Non fragmented */
1403 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1404
1405 skb_queue_tail(&conn->data_q, skb);
1406 } else {
1407 /* Fragmented */
1408 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1409
1410 skb_shinfo(skb)->frag_list = NULL;
1411
1412 /* Queue all fragments atomically */
1413 spin_lock_bh(&conn->data_q.lock);
1414
1415 __skb_queue_tail(&conn->data_q, skb);
1416 do {
1417 skb = list; list = list->next;
1418
1419 skb->dev = (void *) hdev;
1420 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1421 hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT);
1422
1423 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1424
1425 __skb_queue_tail(&conn->data_q, skb);
1426 } while (list);
1427
1428 spin_unlock_bh(&conn->data_q.lock);
1429 }
1430
1431 tasklet_schedule(&hdev->tx_task);
1432 }
1433 EXPORT_SYMBOL(hci_send_acl);
1434
1435 /* Send SCO data */
1436 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1437 {
1438 struct hci_dev *hdev = conn->hdev;
1439 struct hci_sco_hdr hdr;
1440
1441 BT_DBG("%s len %d", hdev->name, skb->len);
1442
1443 hdr.handle = cpu_to_le16(conn->handle);
1444 hdr.dlen = skb->len;
1445
1446 skb_push(skb, HCI_SCO_HDR_SIZE);
1447 skb_reset_transport_header(skb);
1448 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1449
1450 skb->dev = (void *) hdev;
1451 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
1452
1453 skb_queue_tail(&conn->data_q, skb);
1454 tasklet_schedule(&hdev->tx_task);
1455 }
1456 EXPORT_SYMBOL(hci_send_sco);
1457
1458 /* ---- HCI TX task (outgoing data) ---- */
1459
1460 /* HCI Connection scheduler */
1461 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
1462 {
1463 struct hci_conn_hash *h = &hdev->conn_hash;
1464 struct hci_conn *conn = NULL;
1465 int num = 0, min = ~0;
1466 struct list_head *p;
1467
1468 /* We don't have to lock device here. Connections are always
1469 * added and removed with TX task disabled. */
1470 list_for_each(p, &h->list) {
1471 struct hci_conn *c;
1472 c = list_entry(p, struct hci_conn, list);
1473
1474 if (c->type != type || skb_queue_empty(&c->data_q))
1475 continue;
1476
1477 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
1478 continue;
1479
1480 num++;
1481
1482 if (c->sent < min) {
1483 min = c->sent;
1484 conn = c;
1485 }
1486 }
1487
1488 if (conn) {
1489 int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
1490 int q = cnt / num;
1491 *quote = q ? q : 1;
1492 } else
1493 *quote = 0;
1494
1495 BT_DBG("conn %p quote %d", conn, *quote);
1496 return conn;
1497 }
1498
1499 static inline void hci_acl_tx_to(struct hci_dev *hdev)
1500 {
1501 struct hci_conn_hash *h = &hdev->conn_hash;
1502 struct list_head *p;
1503 struct hci_conn *c;
1504
1505 BT_ERR("%s ACL tx timeout", hdev->name);
1506
1507 /* Kill stalled connections */
1508 list_for_each(p, &h->list) {
1509 c = list_entry(p, struct hci_conn, list);
1510 if (c->type == ACL_LINK && c->sent) {
1511 BT_ERR("%s killing stalled ACL connection %s",
1512 hdev->name, batostr(&c->dst));
1513 hci_acl_disconn(c, 0x13);
1514 }
1515 }
1516 }
1517
1518 static inline void hci_sched_acl(struct hci_dev *hdev)
1519 {
1520 struct hci_conn *conn;
1521 struct sk_buff *skb;
1522 int quote;
1523
1524 BT_DBG("%s", hdev->name);
1525
1526 if (!test_bit(HCI_RAW, &hdev->flags)) {
1527 /* ACL tx timeout must be longer than maximum
1528 * link supervision timeout (40.9 seconds) */
1529 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
1530 hci_acl_tx_to(hdev);
1531 }
1532
1533 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
1534 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1535 BT_DBG("skb %p len %d", skb, skb->len);
1536
1537 hci_conn_enter_active_mode(conn);
1538
1539 hci_send_frame(skb);
1540 hdev->acl_last_tx = jiffies;
1541
1542 hdev->acl_cnt--;
1543 conn->sent++;
1544 }
1545 }
1546 }
1547
1548 /* Schedule SCO */
1549 static inline void hci_sched_sco(struct hci_dev *hdev)
1550 {
1551 struct hci_conn *conn;
1552 struct sk_buff *skb;
1553 int quote;
1554
1555 BT_DBG("%s", hdev->name);
1556
1557 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
1558 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1559 BT_DBG("skb %p len %d", skb, skb->len);
1560 hci_send_frame(skb);
1561
1562 conn->sent++;
1563 if (conn->sent == ~0)
1564 conn->sent = 0;
1565 }
1566 }
1567 }
1568
1569 static inline void hci_sched_esco(struct hci_dev *hdev)
1570 {
1571 struct hci_conn *conn;
1572 struct sk_buff *skb;
1573 int quote;
1574
1575 BT_DBG("%s", hdev->name);
1576
1577 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
1578 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1579 BT_DBG("skb %p len %d", skb, skb->len);
1580 hci_send_frame(skb);
1581
1582 conn->sent++;
1583 if (conn->sent == ~0)
1584 conn->sent = 0;
1585 }
1586 }
1587 }
1588
1589 static void hci_tx_task(unsigned long arg)
1590 {
1591 struct hci_dev *hdev = (struct hci_dev *) arg;
1592 struct sk_buff *skb;
1593
1594 read_lock(&hci_task_lock);
1595
1596 BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
1597
1598 /* Schedule queues and send stuff to HCI driver */
1599
1600 hci_sched_acl(hdev);
1601
1602 hci_sched_sco(hdev);
1603
1604 hci_sched_esco(hdev);
1605
1606 /* Send next queued raw (unknown type) packet */
1607 while ((skb = skb_dequeue(&hdev->raw_q)))
1608 hci_send_frame(skb);
1609
1610 read_unlock(&hci_task_lock);
1611 }
1612
1613 /* ----- HCI RX task (incoming data proccessing) ----- */
1614
1615 /* ACL data packet */
1616 static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1617 {
1618 struct hci_acl_hdr *hdr = (void *) skb->data;
1619 struct hci_conn *conn;
1620 __u16 handle, flags;
1621
1622 skb_pull(skb, HCI_ACL_HDR_SIZE);
1623
1624 handle = __le16_to_cpu(hdr->handle);
1625 flags = hci_flags(handle);
1626 handle = hci_handle(handle);
1627
1628 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
1629
1630 hdev->stat.acl_rx++;
1631
1632 hci_dev_lock(hdev);
1633 conn = hci_conn_hash_lookup_handle(hdev, handle);
1634 hci_dev_unlock(hdev);
1635
1636 if (conn) {
1637 register struct hci_proto *hp;
1638
1639 hci_conn_enter_active_mode(conn);
1640
1641 /* Send to upper protocol */
1642 hp = hci_proto[HCI_PROTO_L2CAP];
1643 if (hp && hp->recv_acldata) {
1644 hp->recv_acldata(conn, skb, flags);
1645 return;
1646 }
1647 } else {
1648 BT_ERR("%s ACL packet for unknown connection handle %d",
1649 hdev->name, handle);
1650 }
1651
1652 kfree_skb(skb);
1653 }
1654
1655 /* SCO data packet */
1656 static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1657 {
1658 struct hci_sco_hdr *hdr = (void *) skb->data;
1659 struct hci_conn *conn;
1660 __u16 handle;
1661
1662 skb_pull(skb, HCI_SCO_HDR_SIZE);
1663
1664 handle = __le16_to_cpu(hdr->handle);
1665
1666 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
1667
1668 hdev->stat.sco_rx++;
1669
1670 hci_dev_lock(hdev);
1671 conn = hci_conn_hash_lookup_handle(hdev, handle);
1672 hci_dev_unlock(hdev);
1673
1674 if (conn) {
1675 register struct hci_proto *hp;
1676
1677 /* Send to upper protocol */
1678 hp = hci_proto[HCI_PROTO_SCO];
1679 if (hp && hp->recv_scodata) {
1680 hp->recv_scodata(conn, skb);
1681 return;
1682 }
1683 } else {
1684 BT_ERR("%s SCO packet for unknown connection handle %d",
1685 hdev->name, handle);
1686 }
1687
1688 kfree_skb(skb);
1689 }
1690
1691 static void hci_rx_task(unsigned long arg)
1692 {
1693 struct hci_dev *hdev = (struct hci_dev *) arg;
1694 struct sk_buff *skb;
1695
1696 BT_DBG("%s", hdev->name);
1697
1698 read_lock(&hci_task_lock);
1699
1700 while ((skb = skb_dequeue(&hdev->rx_q))) {
1701 if (atomic_read(&hdev->promisc)) {
1702 /* Send copy to the sockets */
1703 hci_send_to_sock(hdev, skb);
1704 }
1705
1706 if (test_bit(HCI_RAW, &hdev->flags)) {
1707 kfree_skb(skb);
1708 continue;
1709 }
1710
1711 if (test_bit(HCI_INIT, &hdev->flags)) {
1712 /* Don't process data packets in this states. */
1713 switch (bt_cb(skb)->pkt_type) {
1714 case HCI_ACLDATA_PKT:
1715 case HCI_SCODATA_PKT:
1716 kfree_skb(skb);
1717 continue;
1718 }
1719 }
1720
1721 /* Process frame */
1722 switch (bt_cb(skb)->pkt_type) {
1723 case HCI_EVENT_PKT:
1724 hci_event_packet(hdev, skb);
1725 break;
1726
1727 case HCI_ACLDATA_PKT:
1728 BT_DBG("%s ACL data packet", hdev->name);
1729 hci_acldata_packet(hdev, skb);
1730 break;
1731
1732 case HCI_SCODATA_PKT:
1733 BT_DBG("%s SCO data packet", hdev->name);
1734 hci_scodata_packet(hdev, skb);
1735 break;
1736
1737 default:
1738 kfree_skb(skb);
1739 break;
1740 }
1741 }
1742
1743 read_unlock(&hci_task_lock);
1744 }
1745
1746 static void hci_cmd_task(unsigned long arg)
1747 {
1748 struct hci_dev *hdev = (struct hci_dev *) arg;
1749 struct sk_buff *skb;
1750
1751 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
1752
1753 if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
1754 BT_ERR("%s command tx timeout", hdev->name);
1755 atomic_set(&hdev->cmd_cnt, 1);
1756 }
1757
1758 /* Send queued commands */
1759 if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) {
1760 kfree_skb(hdev->sent_cmd);
1761
1762 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
1763 if (hdev->sent_cmd) {
1764 atomic_dec(&hdev->cmd_cnt);
1765 hci_send_frame(skb);
1766 hdev->cmd_last_tx = jiffies;
1767 } else {
1768 skb_queue_head(&hdev->cmd_q, skb);
1769 tasklet_schedule(&hdev->cmd_task);
1770 }
1771 }
1772 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree