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Bluetooth: Create per controller workqueue
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 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
8e87d142
YH		 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
1da177e4
LT		 18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
8e87d142
YH		 20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth HCI core. */
26
82453021 27#include <linux/jiffies.h>
1da177e4
LT		 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>
1da177e4
LT		 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>
f48fd9c8 40#include <linux/workqueue.h>
1da177e4
LT		 41#include <linux/interrupt.h>
42#include <linux/notifier.h>
611b30f7 43#include <linux/rfkill.h>
1da177e4
LT		 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
1da177e4
LT		 53static void hci_cmd_task(unsigned long arg);
54static void hci_rx_task(unsigned long arg);
55static void hci_tx_task(unsigned long arg);
56static void hci_notify(struct hci_dev *hdev, int event);
57
58static DEFINE_RWLOCK(hci_task_lock);
59
60/* HCI device list */
61LIST_HEAD(hci_dev_list);
62DEFINE_RWLOCK(hci_dev_list_lock);
63
64/* HCI callback list */
65LIST_HEAD(hci_cb_list);
66DEFINE_RWLOCK(hci_cb_list_lock);
67
68/* HCI protocols */
69#define HCI_MAX_PROTO 2
70struct hci_proto *hci_proto[HCI_MAX_PROTO];
71
72/* HCI notifiers list */
e041c683 73static ATOMIC_NOTIFIER_HEAD(hci_notifier);
1da177e4
LT		 74
75/* ---- HCI notifications ---- */
76
77int hci_register_notifier(struct notifier_block *nb)
78{
e041c683 79 return atomic_notifier_chain_register(&hci_notifier, nb);
1da177e4
LT		 80}
81
82int hci_unregister_notifier(struct notifier_block *nb)
83{
e041c683 84 return atomic_notifier_chain_unregister(&hci_notifier, nb);
1da177e4
LT		 85}
86
6516455d 87static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 88{
e041c683 89 atomic_notifier_call_chain(&hci_notifier, event, hdev);
1da177e4
LT		 90}
91
92/* ---- HCI requests ---- */
93
94void 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
105static 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. */
8e87d142 117static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
1da177e4
LT		 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;
3ff50b79 150 }
1da177e4
LT		 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
159static 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
7c6a329e
MH		 164 if (!test_bit(HCI_UP, &hdev->flags))
165 return -ENETDOWN;
166
1da177e4
LT		 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
175static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
176{
177 BT_DBG("%s %ld", hdev->name, opt);
178
179 /* Reset device */
a9de9248 180 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 181}
182
183static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
184{
185 struct sk_buff *skb;
1ebb9252 186 __le16 param;
89f2783d 187 __u8 flt_type;
1da177e4
LT		 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))) {
0d48d939 195 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 196 skb->dev = (void *) hdev;
c78ae283 197
1da177e4 198 skb_queue_tail(&hdev->cmd_q, skb);
c78ae283 199 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 200 }
201 skb_queue_purge(&hdev->driver_init);
202
203 /* Mandatory initialization */
204
205 /* Reset */
7a9d4020 206 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks))
a9de9248 207 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 208
209 /* Read Local Supported Features */
a9de9248 210 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 211
1143e5a6 212 /* Read Local Version */
a9de9248 213 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 214
1da177e4 215 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 216 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4
LT		 217
218#if 0
219 /* Host buffer size */
220 {
221 struct hci_cp_host_buffer_size cp;
aca3192c 222 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
1da177e4 223 cp.sco_mtu = HCI_MAX_SCO_SIZE;
aca3192c
YH		 224 cp.acl_max_pkt = cpu_to_le16(0xffff);
225 cp.sco_max_pkt = cpu_to_le16(0xffff);
a9de9248 226 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
1da177e4
LT		 227 }
228#endif
229
230 /* Read BD Address */
a9de9248
MH		 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);
1da177e4
LT		 238
239 /* Read Voice Setting */
a9de9248 240 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 241
242 /* Optional initialization */
243
244 /* Clear Event Filters */
89f2783d 245 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 246 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4
LT		 247
248 /* Page timeout ~20 secs */
aca3192c 249 param = cpu_to_le16(0x8000);
a9de9248 250 hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, &param);
1da177e4
LT		 251
252 /* Connection accept timeout ~20 secs */
aca3192c 253 param = cpu_to_le16(0x7d00);
a9de9248 254 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
1da177e4
LT		 255}
256
257static 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 */
a9de9248 264 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 265}
266
267static 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 */
a9de9248 274 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 275}
276
277static 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
e4e8e37c 283 /* Encryption */
a9de9248 284 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 285}
286
e4e8e37c
MH		 287static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
288{
289 __le16 policy = cpu_to_le16(opt);
290
a418b893 291 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 292
293 /* Default link policy */
294 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
295}
296
8e87d142 297/* Get HCI device by index.
1da177e4
LT		 298 * Device is held on return. */
299struct 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}
1da177e4
LT		 320
321/* ---- Inquiry support ---- */
322static 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
336struct 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
349void 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. */
25ea6db0 358 if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC)))
1da177e4 359 return;
1da177e4
LT		 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
369static 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
391static 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;
a9de9248 405 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 406}
407
408int 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);
8e87d142 424 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1da177e4
LT		 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
04837f64 432 timeo = ir.length * msecs_to_jiffies(2000);
1da177e4
LT		 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;
8e87d142 458 } else
1da177e4
LT		 459 err = -EFAULT;
460
461 kfree(buf);
462
463done:
464 hci_dev_put(hdev);
465 return err;
466}
467
468/* ---- HCI ioctl helpers ---- */
469
470int 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
611b30f7
MH		 482 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
483 ret = -ERFKILL;
484 goto done;
485 }
486
1da177e4
LT		 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
943da25d
MH		 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
1da177e4
LT		 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);
04837f64
MH		 509 ret = __hci_request(hdev, hci_init_req, 0,
510 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 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);
8e87d142 519 } else {
1da177e4
LT		 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
540done:
541 hci_req_unlock(hdev);
542 hci_dev_put(hdev);
543 return ret;
544}
545
546static 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);
04837f64
MH		 577 __hci_request(hdev, hci_reset_req, 0,
578 msecs_to_jiffies(250));
1da177e4
LT		 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
609int 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
621int 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
8e87d142 647 atomic_set(&hdev->cmd_cnt, 1);
1da177e4
LT		 648 hdev->acl_cnt = 0; hdev->sco_cnt = 0;
649
650 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 651 ret = __hci_request(hdev, hci_reset_req, 0,
652 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 653
654done:
655 tasklet_enable(&hdev->tx_task);
656 hci_req_unlock(hdev);
657 hci_dev_put(hdev);
658 return ret;
659}
660
661int 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
676int 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:
04837f64
MH		 690 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
691 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 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 */
04837f64
MH		 702 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
703 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 704 if (err)
705 break;
706 }
707
04837f64
MH		 708 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
709 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 710 break;
711
712 case HCISETSCAN:
04837f64
MH		 713 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
714 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 715 break;
716
1da177e4 717 case HCISETLINKPOL:
e4e8e37c
MH		 718 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
719 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 720 break;
721
722 case HCISETLINKMODE:
e4e8e37c
MH		 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;
1da177e4
LT		 729 break;
730
731 case HCISETACLMTU:
e4e8e37c
MH		 732 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
733 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 734 break;
735
736 case HCISETSCOMTU:
e4e8e37c
MH		 737 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
738 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 739 break;
740
741 default:
742 err = -EINVAL;
743 break;
744 }
e4e8e37c 745
1da177e4
LT		 746 hci_dev_put(hdev);
747 return err;
748}
749
750int 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
c6bf514c 766 if (!(dl = kzalloc(size, GFP_KERNEL)))
1da177e4
LT		 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
791int 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;
943da25d 805 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 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
611b30f7
MH		 828static 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
842static const struct rfkill_ops hci_rfkill_ops = {
843 .set_block = hci_rfkill_set_block,
844};
845
1da177e4
LT		 846/* Alloc HCI device */
847struct hci_dev *hci_alloc_dev(void)
848{
849 struct hci_dev *hdev;
850
25ea6db0 851 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 852 if (!hdev)
853 return NULL;
854
1da177e4
LT		 855 skb_queue_head_init(&hdev->driver_init);
856
857 return hdev;
858}
859EXPORT_SYMBOL(hci_alloc_dev);
860
861/* Free HCI device */
862void hci_free_dev(struct hci_dev *hdev)
863{
864 skb_queue_purge(&hdev->driver_init);
865
a91f2e39
MH		 866 /* will free via device release */
867 put_device(&hdev->dev);
1da177e4
LT		 868}
869EXPORT_SYMBOL(hci_free_dev);
870
871/* Register HCI device */
872int hci_register_dev(struct hci_dev *hdev)
873{
874 struct list_head *head = &hci_dev_list, *p;
ef222013 875 int i, id = 0;
1da177e4 876
c13854ce
MH		 877 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
878 hdev->bus, hdev->owner);
1da177e4
LT		 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 }
8e87d142 891
1da177e4
LT		 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);
5b7f9909 901 hdev->esco_type = (ESCO_HV1);
1da177e4
LT		 902 hdev->link_mode = (HCI_LM_ACCEPT);
903
04837f64
MH		 904 hdev->idle_timeout = 0;
905 hdev->sniff_max_interval = 800;
906 hdev->sniff_min_interval = 80;
907
1da177e4
LT		 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
ef222013
MH		 916 for (i = 0; i < 3; i++)
917 hdev->reassembly[i] = NULL;
918
1da177e4 919 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 920 mutex_init(&hdev->req_lock);
1da177e4
LT		 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
f48fd9c8
MH		 932 hdev->workqueue = create_singlethread_workqueue(hdev->name);
933 if (!hdev->workqueue)
934 goto nomem;
935
1da177e4
LT		 936 hci_register_sysfs(hdev);
937
611b30f7
MH		 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
1da177e4
LT		 947 hci_notify(hdev, HCI_DEV_REG);
948
949 return id;
f48fd9c8
MH		 950
951nomem:
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;
1da177e4
LT		 957}
958EXPORT_SYMBOL(hci_register_dev);
959
960/* Unregister HCI device */
961int hci_unregister_dev(struct hci_dev *hdev)
962{
ef222013
MH		 963 int i;
964
c13854ce 965 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 966
1da177e4
LT		 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
ef222013
MH		 973 for (i = 0; i < 3; i++)
974 kfree_skb(hdev->reassembly[i]);
975
1da177e4
LT		 976 hci_notify(hdev, HCI_DEV_UNREG);
977
611b30f7
MH		 978 if (hdev->rfkill) {
979 rfkill_unregister(hdev->rfkill);
980 rfkill_destroy(hdev->rfkill);
981 }
982
147e2d59
DY		 983 hci_unregister_sysfs(hdev);
984
f48fd9c8
MH		 985 destroy_workqueue(hdev->workqueue);
986
1da177e4 987 __hci_dev_put(hdev);
ef222013 988
1da177e4
LT		 989 return 0;
990}
991EXPORT_SYMBOL(hci_unregister_dev);
992
993/* Suspend HCI device */
994int hci_suspend_dev(struct hci_dev *hdev)
995{
996 hci_notify(hdev, HCI_DEV_SUSPEND);
997 return 0;
998}
999EXPORT_SYMBOL(hci_suspend_dev);
1000
1001/* Resume HCI device */
1002int hci_resume_dev(struct hci_dev *hdev)
1003{
1004 hci_notify(hdev, HCI_DEV_RESUME);
1005 return 0;
1006}
1007EXPORT_SYMBOL(hci_resume_dev);
1008
76bca880
MH		 1009/* Receive frame from HCI drivers */
1010int 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);
c78ae283
MH		 1027 tasklet_schedule(&hdev->rx_task);
1028
76bca880
MH		 1029 return 0;
1030}
1031EXPORT_SYMBOL(hci_recv_frame);
1032
ef222013
MH		 1033/* Receive packet type fragment */
1034#define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2])
1035
1036int 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;
00ae02f3 1083
ef222013
MH		 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}
1115EXPORT_SYMBOL(hci_recv_fragment);
1116
1da177e4
LT		 1117/* ---- Interface to upper protocols ---- */
1118
1119/* Register/Unregister protocols.
1120 * hci_task_lock is used to ensure that no tasks are running. */
1121int 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}
1141EXPORT_SYMBOL(hci_register_proto);
1142
1143int 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}
1163EXPORT_SYMBOL(hci_unregister_proto);
1164
1165int 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}
1175EXPORT_SYMBOL(hci_register_cb);
1176
1177int 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}
1187EXPORT_SYMBOL(hci_unregister_cb);
1188
1189static 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
0d48d939 1198 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4
LT		 1199
1200 if (atomic_read(&hdev->promisc)) {
1201 /* Time stamp */
a61bbcf2 1202 __net_timestamp(skb);
1da177e4
LT		 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 */
a9de9248 1214int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 1215{
1216 int len = HCI_COMMAND_HDR_SIZE + plen;
1217 struct hci_command_hdr *hdr;
1218 struct sk_buff *skb;
1219
a9de9248 1220 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 1221
1222 skb = bt_skb_alloc(len, GFP_ATOMIC);
1223 if (!skb) {
ef222013 1224 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 1225 return -ENOMEM;
1226 }
1227
1228 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 1229 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 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
0d48d939 1237 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 1238 skb->dev = (void *) hdev;
c78ae283 1239
1da177e4 1240 skb_queue_tail(&hdev->cmd_q, skb);
c78ae283 1241 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 1242
1243 return 0;
1244}
1da177e4
LT		 1245
1246/* Get data from the previously sent command */
a9de9248 1247void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 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
a9de9248 1256 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 1257 return NULL;
1258
a9de9248 1259 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 1260
1261 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1262}
1263
1264/* Send ACL data */
1265static 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
badff6d0
ACM		 1270 skb_push(skb, HCI_ACL_HDR_SIZE);
1271 skb_reset_transport_header(skb);
9c70220b 1272 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 1273 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1274 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 1275}
1276
9a9c6a34 1277void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1da177e4
LT		 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;
0d48d939 1285 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1da177e4
LT		 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;
8e87d142 1305
1da177e4 1306 skb->dev = (void *) hdev;
0d48d939 1307 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1da177e4
LT		 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
c78ae283
MH		 1318 tasklet_schedule(&hdev->tx_task);
1319
9a9c6a34 1320 return;
1da177e4
LT		 1321}
1322EXPORT_SYMBOL(hci_send_acl);
1323
1324/* Send SCO data */
0d861d8b 1325void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 1326{
1327 struct hci_dev *hdev = conn->hdev;
1328 struct hci_sco_hdr hdr;
1329
1330 BT_DBG("%s len %d", hdev->name, skb->len);
1331
aca3192c 1332 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 1333 hdr.dlen = skb->len;
1334
badff6d0
ACM		 1335 skb_push(skb, HCI_SCO_HDR_SIZE);
1336 skb_reset_transport_header(skb);
9c70220b 1337 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 1338
1339 skb->dev = (void *) hdev;
0d48d939 1340 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 1341
1da177e4 1342 skb_queue_tail(&conn->data_q, skb);
c78ae283 1343 tasklet_schedule(&hdev->tx_task);
1da177e4
LT		 1344}
1345EXPORT_SYMBOL(hci_send_sco);
1346
1347/* ---- HCI TX task (outgoing data) ---- */
1348
1349/* HCI Connection scheduler */
1350static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
1351{
1352 struct hci_conn_hash *h = &hdev->conn_hash;
5b7f9909 1353 struct hci_conn *conn = NULL;
1da177e4
LT		 1354 int num = 0, min = ~0;
1355 struct list_head *p;
1356
8e87d142 1357 /* We don't have to lock device here. Connections are always
1da177e4
LT		 1358 * added and removed with TX task disabled. */
1359 list_for_each(p, &h->list) {
1360 struct hci_conn *c;
1361 c = list_entry(p, struct hci_conn, list);
1362
769be974 1363 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 1364 continue;
769be974
MH		 1365
1366 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
1367 continue;
1368
1da177e4
LT		 1369 num++;
1370
1371 if (c->sent < min) {
1372 min = c->sent;
1373 conn = c;
1374 }
1375 }
1376
1377 if (conn) {
1378 int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
1379 int q = cnt / num;
1380 *quote = q ? q : 1;
1381 } else
1382 *quote = 0;
1383
1384 BT_DBG("conn %p quote %d", conn, *quote);
1385 return conn;
1386}
1387
1388static inline void hci_acl_tx_to(struct hci_dev *hdev)
1389{
1390 struct hci_conn_hash *h = &hdev->conn_hash;
1391 struct list_head *p;
1392 struct hci_conn *c;
1393
1394 BT_ERR("%s ACL tx timeout", hdev->name);
1395
1396 /* Kill stalled connections */
1397 list_for_each(p, &h->list) {
1398 c = list_entry(p, struct hci_conn, list);
1399 if (c->type == ACL_LINK && c->sent) {
1400 BT_ERR("%s killing stalled ACL connection %s",
1401 hdev->name, batostr(&c->dst));
1402 hci_acl_disconn(c, 0x13);
1403 }
1404 }
1405}
1406
1407static inline void hci_sched_acl(struct hci_dev *hdev)
1408{
1409 struct hci_conn *conn;
1410 struct sk_buff *skb;
1411 int quote;
1412
1413 BT_DBG("%s", hdev->name);
1414
1415 if (!test_bit(HCI_RAW, &hdev->flags)) {
1416 /* ACL tx timeout must be longer than maximum
1417 * link supervision timeout (40.9 seconds) */
82453021 1418 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
1da177e4
LT		 1419 hci_acl_tx_to(hdev);
1420 }
1421
1422 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
1423 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1424 BT_DBG("skb %p len %d", skb, skb->len);
04837f64
MH		 1425
1426 hci_conn_enter_active_mode(conn);
1427
1da177e4
LT		 1428 hci_send_frame(skb);
1429 hdev->acl_last_tx = jiffies;
1430
1431 hdev->acl_cnt--;
1432 conn->sent++;
1433 }
1434 }
1435}
1436
1437/* Schedule SCO */
1438static inline void hci_sched_sco(struct hci_dev *hdev)
1439{
1440 struct hci_conn *conn;
1441 struct sk_buff *skb;
1442 int quote;
1443
1444 BT_DBG("%s", hdev->name);
1445
1446 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
1447 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1448 BT_DBG("skb %p len %d", skb, skb->len);
1449 hci_send_frame(skb);
1450
1451 conn->sent++;
1452 if (conn->sent == ~0)
1453 conn->sent = 0;
1454 }
1455 }
1456}
1457
b6a0dc82
MH		 1458static inline void hci_sched_esco(struct hci_dev *hdev)
1459{
1460 struct hci_conn *conn;
1461 struct sk_buff *skb;
1462 int quote;
1463
1464 BT_DBG("%s", hdev->name);
1465
1466 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
1467 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1468 BT_DBG("skb %p len %d", skb, skb->len);
1469 hci_send_frame(skb);
1470
1471 conn->sent++;
1472 if (conn->sent == ~0)
1473 conn->sent = 0;
1474 }
1475 }
1476}
1477
1da177e4
LT		 1478static void hci_tx_task(unsigned long arg)
1479{
1480 struct hci_dev *hdev = (struct hci_dev *) arg;
1481 struct sk_buff *skb;
1482
1483 read_lock(&hci_task_lock);
1484
1485 BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
1486
1487 /* Schedule queues and send stuff to HCI driver */
1488
1489 hci_sched_acl(hdev);
1490
1491 hci_sched_sco(hdev);
1492
b6a0dc82
MH		 1493 hci_sched_esco(hdev);
1494
1da177e4
LT		 1495 /* Send next queued raw (unknown type) packet */
1496 while ((skb = skb_dequeue(&hdev->raw_q)))
1497 hci_send_frame(skb);
1498
1499 read_unlock(&hci_task_lock);
1500}
1501
1502/* ----- HCI RX task (incoming data proccessing) ----- */
1503
1504/* ACL data packet */
1505static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1506{
1507 struct hci_acl_hdr *hdr = (void *) skb->data;
1508 struct hci_conn *conn;
1509 __u16 handle, flags;
1510
1511 skb_pull(skb, HCI_ACL_HDR_SIZE);
1512
1513 handle = __le16_to_cpu(hdr->handle);
1514 flags = hci_flags(handle);
1515 handle = hci_handle(handle);
1516
1517 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
1518
1519 hdev->stat.acl_rx++;
1520
1521 hci_dev_lock(hdev);
1522 conn = hci_conn_hash_lookup_handle(hdev, handle);
1523 hci_dev_unlock(hdev);
8e87d142 1524
1da177e4
LT		 1525 if (conn) {
1526 register struct hci_proto *hp;
1527
04837f64
MH		 1528 hci_conn_enter_active_mode(conn);
1529
1da177e4
LT		 1530 /* Send to upper protocol */
1531 if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) {
1532 hp->recv_acldata(conn, skb, flags);
1533 return;
1534 }
1535 } else {
8e87d142 1536 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 1537 hdev->name, handle);
1538 }
1539
1540 kfree_skb(skb);
1541}
1542
1543/* SCO data packet */
1544static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1545{
1546 struct hci_sco_hdr *hdr = (void *) skb->data;
1547 struct hci_conn *conn;
1548 __u16 handle;
1549
1550 skb_pull(skb, HCI_SCO_HDR_SIZE);
1551
1552 handle = __le16_to_cpu(hdr->handle);
1553
1554 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
1555
1556 hdev->stat.sco_rx++;
1557
1558 hci_dev_lock(hdev);
1559 conn = hci_conn_hash_lookup_handle(hdev, handle);
1560 hci_dev_unlock(hdev);
1561
1562 if (conn) {
1563 register struct hci_proto *hp;
1564
1565 /* Send to upper protocol */
1566 if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) {
1567 hp->recv_scodata(conn, skb);
1568 return;
1569 }
1570 } else {
8e87d142 1571 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 1572 hdev->name, handle);
1573 }
1574
1575 kfree_skb(skb);
1576}
1577
6516455d 1578static void hci_rx_task(unsigned long arg)
1da177e4
LT		 1579{
1580 struct hci_dev *hdev = (struct hci_dev *) arg;
1581 struct sk_buff *skb;
1582
1583 BT_DBG("%s", hdev->name);
1584
1585 read_lock(&hci_task_lock);
1586
1587 while ((skb = skb_dequeue(&hdev->rx_q))) {
1588 if (atomic_read(&hdev->promisc)) {
1589 /* Send copy to the sockets */
1590 hci_send_to_sock(hdev, skb);
1591 }
1592
1593 if (test_bit(HCI_RAW, &hdev->flags)) {
1594 kfree_skb(skb);
1595 continue;
1596 }
1597
1598 if (test_bit(HCI_INIT, &hdev->flags)) {
1599 /* Don't process data packets in this states. */
0d48d939 1600 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 1601 case HCI_ACLDATA_PKT:
1602 case HCI_SCODATA_PKT:
1603 kfree_skb(skb);
1604 continue;
3ff50b79 1605 }
1da177e4
LT		 1606 }
1607
1608 /* Process frame */
0d48d939 1609 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 1610 case HCI_EVENT_PKT:
1611 hci_event_packet(hdev, skb);
1612 break;
1613
1614 case HCI_ACLDATA_PKT:
1615 BT_DBG("%s ACL data packet", hdev->name);
1616 hci_acldata_packet(hdev, skb);
1617 break;
1618
1619 case HCI_SCODATA_PKT:
1620 BT_DBG("%s SCO data packet", hdev->name);
1621 hci_scodata_packet(hdev, skb);
1622 break;
1623
1624 default:
1625 kfree_skb(skb);
1626 break;
1627 }
1628 }
1629
1630 read_unlock(&hci_task_lock);
1631}
1632
1633static void hci_cmd_task(unsigned long arg)
1634{
1635 struct hci_dev *hdev = (struct hci_dev *) arg;
1636 struct sk_buff *skb;
1637
1638 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
1639
82453021 1640 if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
1da177e4
LT		 1641 BT_ERR("%s command tx timeout", hdev->name);
1642 atomic_set(&hdev->cmd_cnt, 1);
1643 }
1644
1645 /* Send queued commands */
1646 if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) {
7585b97a 1647 kfree_skb(hdev->sent_cmd);
1da177e4
LT		 1648
1649 if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) {
1650 atomic_dec(&hdev->cmd_cnt);
1651 hci_send_frame(skb);
1652 hdev->cmd_last_tx = jiffies;
1653 } else {
1654 skb_queue_head(&hdev->cmd_q, skb);
c78ae283 1655 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 1656 }
1657 }
1658}
kernel source for telekom puls (alcatel/mediatek)