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thp: madvise(MADV_NOHUGEPAGE)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / bluetooth / hci_core.c
blob8b602d881fd758f88a5d7a8cca8d2e7d03caeb92
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_put(hdev);
1015
1016 return 0;
1017 }
1018 EXPORT_SYMBOL(hci_unregister_dev);
1019
1020 /* Suspend HCI device */
1021 int hci_suspend_dev(struct hci_dev *hdev)
1022 {
1023 hci_notify(hdev, HCI_DEV_SUSPEND);
1024 return 0;
1025 }
1026 EXPORT_SYMBOL(hci_suspend_dev);
1027
1028 /* Resume HCI device */
1029 int hci_resume_dev(struct hci_dev *hdev)
1030 {
1031 hci_notify(hdev, HCI_DEV_RESUME);
1032 return 0;
1033 }
1034 EXPORT_SYMBOL(hci_resume_dev);
1035
1036 /* Receive frame from HCI drivers */
1037 int hci_recv_frame(struct sk_buff *skb)
1038 {
1039 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1040 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1041 && !test_bit(HCI_INIT, &hdev->flags))) {
1042 kfree_skb(skb);
1043 return -ENXIO;
1044 }
1045
1046 /* Incomming skb */
1047 bt_cb(skb)->incoming = 1;
1048
1049 /* Time stamp */
1050 __net_timestamp(skb);
1051
1052 /* Queue frame for rx task */
1053 skb_queue_tail(&hdev->rx_q, skb);
1054 tasklet_schedule(&hdev->rx_task);
1055
1056 return 0;
1057 }
1058 EXPORT_SYMBOL(hci_recv_frame);
1059
1060 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1061 int count, __u8 index, gfp_t gfp_mask)
1062 {
1063 int len = 0;
1064 int hlen = 0;
1065 int remain = count;
1066 struct sk_buff *skb;
1067 struct bt_skb_cb *scb;
1068
1069 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1070 index >= NUM_REASSEMBLY)
1071 return -EILSEQ;
1072
1073 skb = hdev->reassembly[index];
1074
1075 if (!skb) {
1076 switch (type) {
1077 case HCI_ACLDATA_PKT:
1078 len = HCI_MAX_FRAME_SIZE;
1079 hlen = HCI_ACL_HDR_SIZE;
1080 break;
1081 case HCI_EVENT_PKT:
1082 len = HCI_MAX_EVENT_SIZE;
1083 hlen = HCI_EVENT_HDR_SIZE;
1084 break;
1085 case HCI_SCODATA_PKT:
1086 len = HCI_MAX_SCO_SIZE;
1087 hlen = HCI_SCO_HDR_SIZE;
1088 break;
1089 }
1090
1091 skb = bt_skb_alloc(len, gfp_mask);
1092 if (!skb)
1093 return -ENOMEM;
1094
1095 scb = (void *) skb->cb;
1096 scb->expect = hlen;
1097 scb->pkt_type = type;
1098
1099 skb->dev = (void *) hdev;
1100 hdev->reassembly[index] = skb;
1101 }
1102
1103 while (count) {
1104 scb = (void *) skb->cb;
1105 len = min(scb->expect, (__u16)count);
1106
1107 memcpy(skb_put(skb, len), data, len);
1108
1109 count -= len;
1110 data += len;
1111 scb->expect -= len;
1112 remain = count;
1113
1114 switch (type) {
1115 case HCI_EVENT_PKT:
1116 if (skb->len == HCI_EVENT_HDR_SIZE) {
1117 struct hci_event_hdr *h = hci_event_hdr(skb);
1118 scb->expect = h->plen;
1119
1120 if (skb_tailroom(skb) < scb->expect) {
1121 kfree_skb(skb);
1122 hdev->reassembly[index] = NULL;
1123 return -ENOMEM;
1124 }
1125 }
1126 break;
1127
1128 case HCI_ACLDATA_PKT:
1129 if (skb->len == HCI_ACL_HDR_SIZE) {
1130 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1131 scb->expect = __le16_to_cpu(h->dlen);
1132
1133 if (skb_tailroom(skb) < scb->expect) {
1134 kfree_skb(skb);
1135 hdev->reassembly[index] = NULL;
1136 return -ENOMEM;
1137 }
1138 }
1139 break;
1140
1141 case HCI_SCODATA_PKT:
1142 if (skb->len == HCI_SCO_HDR_SIZE) {
1143 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1144 scb->expect = h->dlen;
1145
1146 if (skb_tailroom(skb) < scb->expect) {
1147 kfree_skb(skb);
1148 hdev->reassembly[index] = NULL;
1149 return -ENOMEM;
1150 }
1151 }
1152 break;
1153 }
1154
1155 if (scb->expect == 0) {
1156 /* Complete frame */
1157
1158 bt_cb(skb)->pkt_type = type;
1159 hci_recv_frame(skb);
1160
1161 hdev->reassembly[index] = NULL;
1162 return remain;
1163 }
1164 }
1165
1166 return remain;
1167 }
1168
1169 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1170 {
1171 int rem = 0;
1172
1173 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1174 return -EILSEQ;
1175
1176 while (count) {
1177 rem = hci_reassembly(hdev, type, data, count,
1178 type - 1, GFP_ATOMIC);
1179 if (rem < 0)
1180 return rem;
1181
1182 data += (count - rem);
1183 count = rem;
1184 };
1185
1186 return rem;
1187 }
1188 EXPORT_SYMBOL(hci_recv_fragment);
1189
1190 #define STREAM_REASSEMBLY 0
1191
1192 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1193 {
1194 int type;
1195 int rem = 0;
1196
1197 while (count) {
1198 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1199
1200 if (!skb) {
1201 struct { char type; } *pkt;
1202
1203 /* Start of the frame */
1204 pkt = data;
1205 type = pkt->type;
1206
1207 data++;
1208 count--;
1209 } else
1210 type = bt_cb(skb)->pkt_type;
1211
1212 rem = hci_reassembly(hdev, type, data,
1213 count, STREAM_REASSEMBLY, GFP_ATOMIC);
1214 if (rem < 0)
1215 return rem;
1216
1217 data += (count - rem);
1218 count = rem;
1219 };
1220
1221 return rem;
1222 }
1223 EXPORT_SYMBOL(hci_recv_stream_fragment);
1224
1225 /* ---- Interface to upper protocols ---- */
1226
1227 /* Register/Unregister protocols.
1228 * hci_task_lock is used to ensure that no tasks are running. */
1229 int hci_register_proto(struct hci_proto *hp)
1230 {
1231 int err = 0;
1232
1233 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1234
1235 if (hp->id >= HCI_MAX_PROTO)
1236 return -EINVAL;
1237
1238 write_lock_bh(&hci_task_lock);
1239
1240 if (!hci_proto[hp->id])
1241 hci_proto[hp->id] = hp;
1242 else
1243 err = -EEXIST;
1244
1245 write_unlock_bh(&hci_task_lock);
1246
1247 return err;
1248 }
1249 EXPORT_SYMBOL(hci_register_proto);
1250
1251 int hci_unregister_proto(struct hci_proto *hp)
1252 {
1253 int err = 0;
1254
1255 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1256
1257 if (hp->id >= HCI_MAX_PROTO)
1258 return -EINVAL;
1259
1260 write_lock_bh(&hci_task_lock);
1261
1262 if (hci_proto[hp->id])
1263 hci_proto[hp->id] = NULL;
1264 else
1265 err = -ENOENT;
1266
1267 write_unlock_bh(&hci_task_lock);
1268
1269 return err;
1270 }
1271 EXPORT_SYMBOL(hci_unregister_proto);
1272
1273 int hci_register_cb(struct hci_cb *cb)
1274 {
1275 BT_DBG("%p name %s", cb, cb->name);
1276
1277 write_lock_bh(&hci_cb_list_lock);
1278 list_add(&cb->list, &hci_cb_list);
1279 write_unlock_bh(&hci_cb_list_lock);
1280
1281 return 0;
1282 }
1283 EXPORT_SYMBOL(hci_register_cb);
1284
1285 int hci_unregister_cb(struct hci_cb *cb)
1286 {
1287 BT_DBG("%p name %s", cb, cb->name);
1288
1289 write_lock_bh(&hci_cb_list_lock);
1290 list_del(&cb->list);
1291 write_unlock_bh(&hci_cb_list_lock);
1292
1293 return 0;
1294 }
1295 EXPORT_SYMBOL(hci_unregister_cb);
1296
1297 static int hci_send_frame(struct sk_buff *skb)
1298 {
1299 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1300
1301 if (!hdev) {
1302 kfree_skb(skb);
1303 return -ENODEV;
1304 }
1305
1306 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1307
1308 if (atomic_read(&hdev->promisc)) {
1309 /* Time stamp */
1310 __net_timestamp(skb);
1311
1312 hci_send_to_sock(hdev, skb);
1313 }
1314
1315 /* Get rid of skb owner, prior to sending to the driver. */
1316 skb_orphan(skb);
1317
1318 return hdev->send(skb);
1319 }
1320
1321 /* Send HCI command */
1322 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1323 {
1324 int len = HCI_COMMAND_HDR_SIZE + plen;
1325 struct hci_command_hdr *hdr;
1326 struct sk_buff *skb;
1327
1328 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1329
1330 skb = bt_skb_alloc(len, GFP_ATOMIC);
1331 if (!skb) {
1332 BT_ERR("%s no memory for command", hdev->name);
1333 return -ENOMEM;
1334 }
1335
1336 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
1337 hdr->opcode = cpu_to_le16(opcode);
1338 hdr->plen = plen;
1339
1340 if (plen)
1341 memcpy(skb_put(skb, plen), param, plen);
1342
1343 BT_DBG("skb len %d", skb->len);
1344
1345 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1346 skb->dev = (void *) hdev;
1347
1348 skb_queue_tail(&hdev->cmd_q, skb);
1349 tasklet_schedule(&hdev->cmd_task);
1350
1351 return 0;
1352 }
1353
1354 /* Get data from the previously sent command */
1355 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1356 {
1357 struct hci_command_hdr *hdr;
1358
1359 if (!hdev->sent_cmd)
1360 return NULL;
1361
1362 hdr = (void *) hdev->sent_cmd->data;
1363
1364 if (hdr->opcode != cpu_to_le16(opcode))
1365 return NULL;
1366
1367 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1368
1369 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1370 }
1371
1372 /* Send ACL data */
1373 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1374 {
1375 struct hci_acl_hdr *hdr;
1376 int len = skb->len;
1377
1378 skb_push(skb, HCI_ACL_HDR_SIZE);
1379 skb_reset_transport_header(skb);
1380 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
1381 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1382 hdr->dlen = cpu_to_le16(len);
1383 }
1384
1385 void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1386 {
1387 struct hci_dev *hdev = conn->hdev;
1388 struct sk_buff *list;
1389
1390 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1391
1392 skb->dev = (void *) hdev;
1393 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1394 hci_add_acl_hdr(skb, conn->handle, flags | ACL_START);
1395
1396 list = skb_shinfo(skb)->frag_list;
1397 if (!list) {
1398 /* Non fragmented */
1399 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1400
1401 skb_queue_tail(&conn->data_q, skb);
1402 } else {
1403 /* Fragmented */
1404 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1405
1406 skb_shinfo(skb)->frag_list = NULL;
1407
1408 /* Queue all fragments atomically */
1409 spin_lock_bh(&conn->data_q.lock);
1410
1411 __skb_queue_tail(&conn->data_q, skb);
1412 do {
1413 skb = list; list = list->next;
1414
1415 skb->dev = (void *) hdev;
1416 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1417 hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT);
1418
1419 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1420
1421 __skb_queue_tail(&conn->data_q, skb);
1422 } while (list);
1423
1424 spin_unlock_bh(&conn->data_q.lock);
1425 }
1426
1427 tasklet_schedule(&hdev->tx_task);
1428 }
1429 EXPORT_SYMBOL(hci_send_acl);
1430
1431 /* Send SCO data */
1432 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1433 {
1434 struct hci_dev *hdev = conn->hdev;
1435 struct hci_sco_hdr hdr;
1436
1437 BT_DBG("%s len %d", hdev->name, skb->len);
1438
1439 hdr.handle = cpu_to_le16(conn->handle);
1440 hdr.dlen = skb->len;
1441
1442 skb_push(skb, HCI_SCO_HDR_SIZE);
1443 skb_reset_transport_header(skb);
1444 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1445
1446 skb->dev = (void *) hdev;
1447 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
1448
1449 skb_queue_tail(&conn->data_q, skb);
1450 tasklet_schedule(&hdev->tx_task);
1451 }
1452 EXPORT_SYMBOL(hci_send_sco);
1453
1454 /* ---- HCI TX task (outgoing data) ---- */
1455
1456 /* HCI Connection scheduler */
1457 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
1458 {
1459 struct hci_conn_hash *h = &hdev->conn_hash;
1460 struct hci_conn *conn = NULL;
1461 int num = 0, min = ~0;
1462 struct list_head *p;
1463
1464 /* We don't have to lock device here. Connections are always
1465 * added and removed with TX task disabled. */
1466 list_for_each(p, &h->list) {
1467 struct hci_conn *c;
1468 c = list_entry(p, struct hci_conn, list);
1469
1470 if (c->type != type || skb_queue_empty(&c->data_q))
1471 continue;
1472
1473 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
1474 continue;
1475
1476 num++;
1477
1478 if (c->sent < min) {
1479 min = c->sent;
1480 conn = c;
1481 }
1482 }
1483
1484 if (conn) {
1485 int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
1486 int q = cnt / num;
1487 *quote = q ? q : 1;
1488 } else
1489 *quote = 0;
1490
1491 BT_DBG("conn %p quote %d", conn, *quote);
1492 return conn;
1493 }
1494
1495 static inline void hci_acl_tx_to(struct hci_dev *hdev)
1496 {
1497 struct hci_conn_hash *h = &hdev->conn_hash;
1498 struct list_head *p;
1499 struct hci_conn *c;
1500
1501 BT_ERR("%s ACL tx timeout", hdev->name);
1502
1503 /* Kill stalled connections */
1504 list_for_each(p, &h->list) {
1505 c = list_entry(p, struct hci_conn, list);
1506 if (c->type == ACL_LINK && c->sent) {
1507 BT_ERR("%s killing stalled ACL connection %s",
1508 hdev->name, batostr(&c->dst));
1509 hci_acl_disconn(c, 0x13);
1510 }
1511 }
1512 }
1513
1514 static inline void hci_sched_acl(struct hci_dev *hdev)
1515 {
1516 struct hci_conn *conn;
1517 struct sk_buff *skb;
1518 int quote;
1519
1520 BT_DBG("%s", hdev->name);
1521
1522 if (!test_bit(HCI_RAW, &hdev->flags)) {
1523 /* ACL tx timeout must be longer than maximum
1524 * link supervision timeout (40.9 seconds) */
1525 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
1526 hci_acl_tx_to(hdev);
1527 }
1528
1529 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
1530 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1531 BT_DBG("skb %p len %d", skb, skb->len);
1532
1533 hci_conn_enter_active_mode(conn);
1534
1535 hci_send_frame(skb);
1536 hdev->acl_last_tx = jiffies;
1537
1538 hdev->acl_cnt--;
1539 conn->sent++;
1540 }
1541 }
1542 }
1543
1544 /* Schedule SCO */
1545 static inline void hci_sched_sco(struct hci_dev *hdev)
1546 {
1547 struct hci_conn *conn;
1548 struct sk_buff *skb;
1549 int quote;
1550
1551 BT_DBG("%s", hdev->name);
1552
1553 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
1554 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1555 BT_DBG("skb %p len %d", skb, skb->len);
1556 hci_send_frame(skb);
1557
1558 conn->sent++;
1559 if (conn->sent == ~0)
1560 conn->sent = 0;
1561 }
1562 }
1563 }
1564
1565 static inline void hci_sched_esco(struct hci_dev *hdev)
1566 {
1567 struct hci_conn *conn;
1568 struct sk_buff *skb;
1569 int quote;
1570
1571 BT_DBG("%s", hdev->name);
1572
1573 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
1574 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1575 BT_DBG("skb %p len %d", skb, skb->len);
1576 hci_send_frame(skb);
1577
1578 conn->sent++;
1579 if (conn->sent == ~0)
1580 conn->sent = 0;
1581 }
1582 }
1583 }
1584
1585 static void hci_tx_task(unsigned long arg)
1586 {
1587 struct hci_dev *hdev = (struct hci_dev *) arg;
1588 struct sk_buff *skb;
1589
1590 read_lock(&hci_task_lock);
1591
1592 BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
1593
1594 /* Schedule queues and send stuff to HCI driver */
1595
1596 hci_sched_acl(hdev);
1597
1598 hci_sched_sco(hdev);
1599
1600 hci_sched_esco(hdev);
1601
1602 /* Send next queued raw (unknown type) packet */
1603 while ((skb = skb_dequeue(&hdev->raw_q)))
1604 hci_send_frame(skb);
1605
1606 read_unlock(&hci_task_lock);
1607 }
1608
1609 /* ----- HCI RX task (incoming data proccessing) ----- */
1610
1611 /* ACL data packet */
1612 static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1613 {
1614 struct hci_acl_hdr *hdr = (void *) skb->data;
1615 struct hci_conn *conn;
1616 __u16 handle, flags;
1617
1618 skb_pull(skb, HCI_ACL_HDR_SIZE);
1619
1620 handle = __le16_to_cpu(hdr->handle);
1621 flags = hci_flags(handle);
1622 handle = hci_handle(handle);
1623
1624 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
1625
1626 hdev->stat.acl_rx++;
1627
1628 hci_dev_lock(hdev);
1629 conn = hci_conn_hash_lookup_handle(hdev, handle);
1630 hci_dev_unlock(hdev);
1631
1632 if (conn) {
1633 register struct hci_proto *hp;
1634
1635 hci_conn_enter_active_mode(conn);
1636
1637 /* Send to upper protocol */
1638 hp = hci_proto[HCI_PROTO_L2CAP];
1639 if (hp && hp->recv_acldata) {
1640 hp->recv_acldata(conn, skb, flags);
1641 return;
1642 }
1643 } else {
1644 BT_ERR("%s ACL packet for unknown connection handle %d",
1645 hdev->name, handle);
1646 }
1647
1648 kfree_skb(skb);
1649 }
1650
1651 /* SCO data packet */
1652 static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1653 {
1654 struct hci_sco_hdr *hdr = (void *) skb->data;
1655 struct hci_conn *conn;
1656 __u16 handle;
1657
1658 skb_pull(skb, HCI_SCO_HDR_SIZE);
1659
1660 handle = __le16_to_cpu(hdr->handle);
1661
1662 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
1663
1664 hdev->stat.sco_rx++;
1665
1666 hci_dev_lock(hdev);
1667 conn = hci_conn_hash_lookup_handle(hdev, handle);
1668 hci_dev_unlock(hdev);
1669
1670 if (conn) {
1671 register struct hci_proto *hp;
1672
1673 /* Send to upper protocol */
1674 hp = hci_proto[HCI_PROTO_SCO];
1675 if (hp && hp->recv_scodata) {
1676 hp->recv_scodata(conn, skb);
1677 return;
1678 }
1679 } else {
1680 BT_ERR("%s SCO packet for unknown connection handle %d",
1681 hdev->name, handle);
1682 }
1683
1684 kfree_skb(skb);
1685 }
1686
1687 static void hci_rx_task(unsigned long arg)
1688 {
1689 struct hci_dev *hdev = (struct hci_dev *) arg;
1690 struct sk_buff *skb;
1691
1692 BT_DBG("%s", hdev->name);
1693
1694 read_lock(&hci_task_lock);
1695
1696 while ((skb = skb_dequeue(&hdev->rx_q))) {
1697 if (atomic_read(&hdev->promisc)) {
1698 /* Send copy to the sockets */
1699 hci_send_to_sock(hdev, skb);
1700 }
1701
1702 if (test_bit(HCI_RAW, &hdev->flags)) {
1703 kfree_skb(skb);
1704 continue;
1705 }
1706
1707 if (test_bit(HCI_INIT, &hdev->flags)) {
1708 /* Don't process data packets in this states. */
1709 switch (bt_cb(skb)->pkt_type) {
1710 case HCI_ACLDATA_PKT:
1711 case HCI_SCODATA_PKT:
1712 kfree_skb(skb);
1713 continue;
1714 }
1715 }
1716
1717 /* Process frame */
1718 switch (bt_cb(skb)->pkt_type) {
1719 case HCI_EVENT_PKT:
1720 hci_event_packet(hdev, skb);
1721 break;
1722
1723 case HCI_ACLDATA_PKT:
1724 BT_DBG("%s ACL data packet", hdev->name);
1725 hci_acldata_packet(hdev, skb);
1726 break;
1727
1728 case HCI_SCODATA_PKT:
1729 BT_DBG("%s SCO data packet", hdev->name);
1730 hci_scodata_packet(hdev, skb);
1731 break;
1732
1733 default:
1734 kfree_skb(skb);
1735 break;
1736 }
1737 }
1738
1739 read_unlock(&hci_task_lock);
1740 }
1741
1742 static void hci_cmd_task(unsigned long arg)
1743 {
1744 struct hci_dev *hdev = (struct hci_dev *) arg;
1745 struct sk_buff *skb;
1746
1747 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
1748
1749 if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
1750 BT_ERR("%s command tx timeout", hdev->name);
1751 atomic_set(&hdev->cmd_cnt, 1);
1752 }
1753
1754 /* Send queued commands */
1755 if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) {
1756 kfree_skb(hdev->sent_cmd);
1757
1758 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
1759 if (hdev->sent_cmd) {
1760 atomic_dec(&hdev->cmd_cnt);
1761 hci_send_frame(skb);
1762 hdev->cmd_last_tx = jiffies;
1763 } else {
1764 skb_queue_head(&hdev->cmd_q, skb);
1765 tasklet_schedule(&hdev->cmd_task);
1766 }
1767 }
1768 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree