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Bluetooth: Add discovering event to the Management interface
[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>
6bd32326 44#include <linux/timer.h>
1da177e4
LT		 45#include <net/sock.h>
46
47#include <asm/system.h>
70f23020 48#include <linux/uaccess.h>
1da177e4
LT		 49#include <asm/unaligned.h>
50
51#include <net/bluetooth/bluetooth.h>
52#include <net/bluetooth/hci_core.h>
53
ab81cbf9
JH		 54#define AUTO_OFF_TIMEOUT 2000
55
1da177e4
LT		 56static void hci_cmd_task(unsigned long arg);
57static void hci_rx_task(unsigned long arg);
58static void hci_tx_task(unsigned long arg);
1da177e4
LT		 59
60static DEFINE_RWLOCK(hci_task_lock);
61
62/* HCI device list */
63LIST_HEAD(hci_dev_list);
64DEFINE_RWLOCK(hci_dev_list_lock);
65
66/* HCI callback list */
67LIST_HEAD(hci_cb_list);
68DEFINE_RWLOCK(hci_cb_list_lock);
69
70/* HCI protocols */
71#define HCI_MAX_PROTO 2
72struct hci_proto *hci_proto[HCI_MAX_PROTO];
73
74/* HCI notifiers list */
e041c683 75static ATOMIC_NOTIFIER_HEAD(hci_notifier);
1da177e4
LT		 76
77/* ---- HCI notifications ---- */
78
79int hci_register_notifier(struct notifier_block *nb)
80{
e041c683 81 return atomic_notifier_chain_register(&hci_notifier, nb);
1da177e4
LT		 82}
83
84int hci_unregister_notifier(struct notifier_block *nb)
85{
e041c683 86 return atomic_notifier_chain_unregister(&hci_notifier, nb);
1da177e4
LT		 87}
88
6516455d 89static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 90{
e041c683 91 atomic_notifier_call_chain(&hci_notifier, event, hdev);
1da177e4
LT		 92}
93
94/* ---- HCI requests ---- */
95
23bb5763 96void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 97{
23bb5763
JH		 98 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
99
a5040efa
JH		 100 /* If this is the init phase check if the completed command matches
101 * the last init command, and if not just return.
102 */
103 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
23bb5763 104 return;
1da177e4
LT		 105
106 if (hdev->req_status == HCI_REQ_PEND) {
107 hdev->req_result = result;
108 hdev->req_status = HCI_REQ_DONE;
109 wake_up_interruptible(&hdev->req_wait_q);
110 }
111}
112
113static void hci_req_cancel(struct hci_dev *hdev, int err)
114{
115 BT_DBG("%s err 0x%2.2x", hdev->name, err);
116
117 if (hdev->req_status == HCI_REQ_PEND) {
118 hdev->req_result = err;
119 hdev->req_status = HCI_REQ_CANCELED;
120 wake_up_interruptible(&hdev->req_wait_q);
121 }
122}
123
124/* Execute request and wait for completion. */
8e87d142 125static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 126 unsigned long opt, __u32 timeout)
1da177e4
LT		 127{
128 DECLARE_WAITQUEUE(wait, current);
129 int err = 0;
130
131 BT_DBG("%s start", hdev->name);
132
133 hdev->req_status = HCI_REQ_PEND;
134
135 add_wait_queue(&hdev->req_wait_q, &wait);
136 set_current_state(TASK_INTERRUPTIBLE);
137
138 req(hdev, opt);
139 schedule_timeout(timeout);
140
141 remove_wait_queue(&hdev->req_wait_q, &wait);
142
143 if (signal_pending(current))
144 return -EINTR;
145
146 switch (hdev->req_status) {
147 case HCI_REQ_DONE:
148 err = -bt_err(hdev->req_result);
149 break;
150
151 case HCI_REQ_CANCELED:
152 err = -hdev->req_result;
153 break;
154
155 default:
156 err = -ETIMEDOUT;
157 break;
3ff50b79 158 }
1da177e4 159
a5040efa 160 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 161
162 BT_DBG("%s end: err %d", hdev->name, err);
163
164 return err;
165}
166
167static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 168 unsigned long opt, __u32 timeout)
1da177e4
LT		 169{
170 int ret;
171
7c6a329e
MH		 172 if (!test_bit(HCI_UP, &hdev->flags))
173 return -ENETDOWN;
174
1da177e4
LT		 175 /* Serialize all requests */
176 hci_req_lock(hdev);
177 ret = __hci_request(hdev, req, opt, timeout);
178 hci_req_unlock(hdev);
179
180 return ret;
181}
182
183static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
184{
185 BT_DBG("%s %ld", hdev->name, opt);
186
187 /* Reset device */
10572132 188 set_bit(HCI_RESET, &hdev->flags);
a9de9248 189 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 190}
191
192static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
193{
b0916ea0 194 struct hci_cp_delete_stored_link_key cp;
1da177e4 195 struct sk_buff *skb;
1ebb9252 196 __le16 param;
89f2783d 197 __u8 flt_type;
1da177e4
LT		 198
199 BT_DBG("%s %ld", hdev->name, opt);
200
201 /* Driver initialization */
202
203 /* Special commands */
204 while ((skb = skb_dequeue(&hdev->driver_init))) {
0d48d939 205 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 206 skb->dev = (void *) hdev;
c78ae283 207
1da177e4 208 skb_queue_tail(&hdev->cmd_q, skb);
c78ae283 209 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 210 }
211 skb_queue_purge(&hdev->driver_init);
212
213 /* Mandatory initialization */
214
215 /* Reset */
10572132
GP		 216 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
217 set_bit(HCI_RESET, &hdev->flags);
a9de9248 218 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
10572132 219 }
1da177e4
LT		 220
221 /* Read Local Supported Features */
a9de9248 222 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 223
1143e5a6 224 /* Read Local Version */
a9de9248 225 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 226
1da177e4 227 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 228 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4
LT		 229
230#if 0
231 /* Host buffer size */
232 {
233 struct hci_cp_host_buffer_size cp;
aca3192c 234 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
1da177e4 235 cp.sco_mtu = HCI_MAX_SCO_SIZE;
aca3192c
YH		 236 cp.acl_max_pkt = cpu_to_le16(0xffff);
237 cp.sco_max_pkt = cpu_to_le16(0xffff);
a9de9248 238 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
1da177e4
LT		 239 }
240#endif
241
242 /* Read BD Address */
a9de9248
MH		 243 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
244
245 /* Read Class of Device */
246 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
247
248 /* Read Local Name */
249 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 250
251 /* Read Voice Setting */
a9de9248 252 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 253
254 /* Optional initialization */
255
256 /* Clear Event Filters */
89f2783d 257 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 258 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 259
1da177e4 260 /* Connection accept timeout ~20 secs */
aca3192c 261 param = cpu_to_le16(0x7d00);
a9de9248 262 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 263
264 bacpy(&cp.bdaddr, BDADDR_ANY);
265 cp.delete_all = 1;
266 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 267}
268
6ed58ec5
VT		 269static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
270{
271 BT_DBG("%s", hdev->name);
272
273 /* Read LE buffer size */
274 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
275}
276
1da177e4
LT		 277static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
278{
279 __u8 scan = opt;
280
281 BT_DBG("%s %x", hdev->name, scan);
282
283 /* Inquiry and Page scans */
a9de9248 284 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 285}
286
287static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
288{
289 __u8 auth = opt;
290
291 BT_DBG("%s %x", hdev->name, auth);
292
293 /* Authentication */
a9de9248 294 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 295}
296
297static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
298{
299 __u8 encrypt = opt;
300
301 BT_DBG("%s %x", hdev->name, encrypt);
302
e4e8e37c 303 /* Encryption */
a9de9248 304 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 305}
306
e4e8e37c
MH		 307static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
308{
309 __le16 policy = cpu_to_le16(opt);
310
a418b893 311 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 312
313 /* Default link policy */
314 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
315}
316
8e87d142 317/* Get HCI device by index.
1da177e4
LT		 318 * Device is held on return. */
319struct hci_dev *hci_dev_get(int index)
320{
321 struct hci_dev *hdev = NULL;
322 struct list_head *p;
323
324 BT_DBG("%d", index);
325
326 if (index < 0)
327 return NULL;
328
329 read_lock(&hci_dev_list_lock);
330 list_for_each(p, &hci_dev_list) {
331 struct hci_dev *d = list_entry(p, struct hci_dev, list);
332 if (d->id == index) {
333 hdev = hci_dev_hold(d);
334 break;
335 }
336 }
337 read_unlock(&hci_dev_list_lock);
338 return hdev;
339}
1da177e4
LT		 340
341/* ---- Inquiry support ---- */
342static void inquiry_cache_flush(struct hci_dev *hdev)
343{
344 struct inquiry_cache *cache = &hdev->inq_cache;
345 struct inquiry_entry *next = cache->list, *e;
346
347 BT_DBG("cache %p", cache);
348
349 cache->list = NULL;
350 while ((e = next)) {
351 next = e->next;
352 kfree(e);
353 }
354}
355
356struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
357{
358 struct inquiry_cache *cache = &hdev->inq_cache;
359 struct inquiry_entry *e;
360
361 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
362
363 for (e = cache->list; e; e = e->next)
364 if (!bacmp(&e->data.bdaddr, bdaddr))
365 break;
366 return e;
367}
368
369void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
370{
371 struct inquiry_cache *cache = &hdev->inq_cache;
70f23020 372 struct inquiry_entry *ie;
1da177e4
LT		 373
374 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
375
70f23020
AE		 376 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
377 if (!ie) {
1da177e4 378 /* Entry not in the cache. Add new one. */
70f23020
AE		 379 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
380 if (!ie)
1da177e4 381 return;
70f23020
AE		 382
383 ie->next = cache->list;
384 cache->list = ie;
1da177e4
LT		 385 }
386
70f23020
AE		 387 memcpy(&ie->data, data, sizeof(*data));
388 ie->timestamp = jiffies;
1da177e4
LT		 389 cache->timestamp = jiffies;
390}
391
392static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
393{
394 struct inquiry_cache *cache = &hdev->inq_cache;
395 struct inquiry_info *info = (struct inquiry_info *) buf;
396 struct inquiry_entry *e;
397 int copied = 0;
398
399 for (e = cache->list; e && copied < num; e = e->next, copied++) {
400 struct inquiry_data *data = &e->data;
401 bacpy(&info->bdaddr, &data->bdaddr);
402 info->pscan_rep_mode = data->pscan_rep_mode;
403 info->pscan_period_mode = data->pscan_period_mode;
404 info->pscan_mode = data->pscan_mode;
405 memcpy(info->dev_class, data->dev_class, 3);
406 info->clock_offset = data->clock_offset;
407 info++;
408 }
409
410 BT_DBG("cache %p, copied %d", cache, copied);
411 return copied;
412}
413
414static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
415{
416 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
417 struct hci_cp_inquiry cp;
418
419 BT_DBG("%s", hdev->name);
420
421 if (test_bit(HCI_INQUIRY, &hdev->flags))
422 return;
423
424 /* Start Inquiry */
425 memcpy(&cp.lap, &ir->lap, 3);
426 cp.length = ir->length;
427 cp.num_rsp = ir->num_rsp;
a9de9248 428 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 429}
430
431int hci_inquiry(void __user *arg)
432{
433 __u8 __user *ptr = arg;
434 struct hci_inquiry_req ir;
435 struct hci_dev *hdev;
436 int err = 0, do_inquiry = 0, max_rsp;
437 long timeo;
438 __u8 *buf;
439
440 if (copy_from_user(&ir, ptr, sizeof(ir)))
441 return -EFAULT;
442
5a08ecce
AE		 443 hdev = hci_dev_get(ir.dev_id);
444 if (!hdev)
1da177e4
LT		 445 return -ENODEV;
446
447 hci_dev_lock_bh(hdev);
8e87d142 448 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 449 inquiry_cache_empty(hdev) ||
450 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 451 inquiry_cache_flush(hdev);
452 do_inquiry = 1;
453 }
454 hci_dev_unlock_bh(hdev);
455
04837f64 456 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 457
458 if (do_inquiry) {
459 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
460 if (err < 0)
461 goto done;
462 }
1da177e4
LT		 463
464 /* for unlimited number of responses we will use buffer with 255 entries */
465 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
466
467 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
468 * copy it to the user space.
469 */
01df8c31 470 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 471 if (!buf) {
1da177e4
LT		 472 err = -ENOMEM;
473 goto done;
474 }
475
476 hci_dev_lock_bh(hdev);
477 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
478 hci_dev_unlock_bh(hdev);
479
480 BT_DBG("num_rsp %d", ir.num_rsp);
481
482 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
483 ptr += sizeof(ir);
484 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
485 ir.num_rsp))
486 err = -EFAULT;
8e87d142 487 } else
1da177e4
LT		 488 err = -EFAULT;
489
490 kfree(buf);
491
492done:
493 hci_dev_put(hdev);
494 return err;
495}
496
497/* ---- HCI ioctl helpers ---- */
498
499int hci_dev_open(__u16 dev)
500{
501 struct hci_dev *hdev;
502 int ret = 0;
503
5a08ecce
AE		 504 hdev = hci_dev_get(dev);
505 if (!hdev)
1da177e4
LT		 506 return -ENODEV;
507
508 BT_DBG("%s %p", hdev->name, hdev);
509
510 hci_req_lock(hdev);
511
611b30f7
MH		 512 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
513 ret = -ERFKILL;
514 goto done;
515 }
516
1da177e4
LT		 517 if (test_bit(HCI_UP, &hdev->flags)) {
518 ret = -EALREADY;
519 goto done;
520 }
521
522 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
523 set_bit(HCI_RAW, &hdev->flags);
524
943da25d
MH		 525 /* Treat all non BR/EDR controllers as raw devices for now */
526 if (hdev->dev_type != HCI_BREDR)
527 set_bit(HCI_RAW, &hdev->flags);
528
1da177e4
LT		 529 if (hdev->open(hdev)) {
530 ret = -EIO;
531 goto done;
532 }
533
534 if (!test_bit(HCI_RAW, &hdev->flags)) {
535 atomic_set(&hdev->cmd_cnt, 1);
536 set_bit(HCI_INIT, &hdev->flags);
a5040efa 537 hdev->init_last_cmd = 0;
1da177e4 538
04837f64
MH		 539 ret = __hci_request(hdev, hci_init_req, 0,
540 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 541
6ed58ec5
VT		 542 if (lmp_le_capable(hdev))
543 ret = __hci_request(hdev, hci_le_init_req, 0,
544 msecs_to_jiffies(HCI_INIT_TIMEOUT));
545
1da177e4
LT		 546 clear_bit(HCI_INIT, &hdev->flags);
547 }
548
549 if (!ret) {
550 hci_dev_hold(hdev);
551 set_bit(HCI_UP, &hdev->flags);
552 hci_notify(hdev, HCI_DEV_UP);
5add6af8
JH		 553 if (!test_bit(HCI_SETUP, &hdev->flags))
554 mgmt_powered(hdev->id, 1);
8e87d142 555 } else {
1da177e4
LT		 556 /* Init failed, cleanup */
557 tasklet_kill(&hdev->rx_task);
558 tasklet_kill(&hdev->tx_task);
559 tasklet_kill(&hdev->cmd_task);
560
561 skb_queue_purge(&hdev->cmd_q);
562 skb_queue_purge(&hdev->rx_q);
563
564 if (hdev->flush)
565 hdev->flush(hdev);
566
567 if (hdev->sent_cmd) {
568 kfree_skb(hdev->sent_cmd);
569 hdev->sent_cmd = NULL;
570 }
571
572 hdev->close(hdev);
573 hdev->flags = 0;
574 }
575
576done:
577 hci_req_unlock(hdev);
578 hci_dev_put(hdev);
579 return ret;
580}
581
582static int hci_dev_do_close(struct hci_dev *hdev)
583{
584 BT_DBG("%s %p", hdev->name, hdev);
585
586 hci_req_cancel(hdev, ENODEV);
587 hci_req_lock(hdev);
588
6f5ef998
TG		 589 /* Stop timer, it might be running */
590 del_timer_sync(&hdev->cmd_timer);
591
1da177e4 592 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 593 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 594 hci_req_unlock(hdev);
595 return 0;
596 }
597
598 /* Kill RX and TX tasks */
599 tasklet_kill(&hdev->rx_task);
600 tasklet_kill(&hdev->tx_task);
601
602 hci_dev_lock_bh(hdev);
603 inquiry_cache_flush(hdev);
604 hci_conn_hash_flush(hdev);
605 hci_dev_unlock_bh(hdev);
606
607 hci_notify(hdev, HCI_DEV_DOWN);
608
609 if (hdev->flush)
610 hdev->flush(hdev);
611
612 /* Reset device */
613 skb_queue_purge(&hdev->cmd_q);
614 atomic_set(&hdev->cmd_cnt, 1);
615 if (!test_bit(HCI_RAW, &hdev->flags)) {
616 set_bit(HCI_INIT, &hdev->flags);
04837f64
MH		 617 __hci_request(hdev, hci_reset_req, 0,
618 msecs_to_jiffies(250));
1da177e4
LT		 619 clear_bit(HCI_INIT, &hdev->flags);
620 }
621
622 /* Kill cmd task */
623 tasklet_kill(&hdev->cmd_task);
624
625 /* Drop queues */
626 skb_queue_purge(&hdev->rx_q);
627 skb_queue_purge(&hdev->cmd_q);
628 skb_queue_purge(&hdev->raw_q);
629
630 /* Drop last sent command */
631 if (hdev->sent_cmd) {
632 kfree_skb(hdev->sent_cmd);
633 hdev->sent_cmd = NULL;
634 }
635
636 /* After this point our queues are empty
637 * and no tasks are scheduled. */
638 hdev->close(hdev);
639
5add6af8
JH		 640 mgmt_powered(hdev->id, 0);
641
1da177e4
LT		 642 /* Clear flags */
643 hdev->flags = 0;
644
645 hci_req_unlock(hdev);
646
647 hci_dev_put(hdev);
648 return 0;
649}
650
651int hci_dev_close(__u16 dev)
652{
653 struct hci_dev *hdev;
654 int err;
655
70f23020
AE		 656 hdev = hci_dev_get(dev);
657 if (!hdev)
1da177e4
LT		 658 return -ENODEV;
659 err = hci_dev_do_close(hdev);
660 hci_dev_put(hdev);
661 return err;
662}
663
664int hci_dev_reset(__u16 dev)
665{
666 struct hci_dev *hdev;
667 int ret = 0;
668
70f23020
AE		 669 hdev = hci_dev_get(dev);
670 if (!hdev)
1da177e4
LT		 671 return -ENODEV;
672
673 hci_req_lock(hdev);
674 tasklet_disable(&hdev->tx_task);
675
676 if (!test_bit(HCI_UP, &hdev->flags))
677 goto done;
678
679 /* Drop queues */
680 skb_queue_purge(&hdev->rx_q);
681 skb_queue_purge(&hdev->cmd_q);
682
683 hci_dev_lock_bh(hdev);
684 inquiry_cache_flush(hdev);
685 hci_conn_hash_flush(hdev);
686 hci_dev_unlock_bh(hdev);
687
688 if (hdev->flush)
689 hdev->flush(hdev);
690
8e87d142 691 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 692 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 693
694 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 695 ret = __hci_request(hdev, hci_reset_req, 0,
696 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 697
698done:
699 tasklet_enable(&hdev->tx_task);
700 hci_req_unlock(hdev);
701 hci_dev_put(hdev);
702 return ret;
703}
704
705int hci_dev_reset_stat(__u16 dev)
706{
707 struct hci_dev *hdev;
708 int ret = 0;
709
70f23020
AE		 710 hdev = hci_dev_get(dev);
711 if (!hdev)
1da177e4
LT		 712 return -ENODEV;
713
714 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
715
716 hci_dev_put(hdev);
717
718 return ret;
719}
720
721int hci_dev_cmd(unsigned int cmd, void __user *arg)
722{
723 struct hci_dev *hdev;
724 struct hci_dev_req dr;
725 int err = 0;
726
727 if (copy_from_user(&dr, arg, sizeof(dr)))
728 return -EFAULT;
729
70f23020
AE		 730 hdev = hci_dev_get(dr.dev_id);
731 if (!hdev)
1da177e4
LT		 732 return -ENODEV;
733
734 switch (cmd) {
735 case HCISETAUTH:
04837f64
MH		 736 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
737 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 738 break;
739
740 case HCISETENCRYPT:
741 if (!lmp_encrypt_capable(hdev)) {
742 err = -EOPNOTSUPP;
743 break;
744 }
745
746 if (!test_bit(HCI_AUTH, &hdev->flags)) {
747 /* Auth must be enabled first */
04837f64
MH		 748 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
749 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 750 if (err)
751 break;
752 }
753
04837f64
MH		 754 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
755 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 756 break;
757
758 case HCISETSCAN:
04837f64
MH		 759 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
760 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 761 break;
762
1da177e4 763 case HCISETLINKPOL:
e4e8e37c
MH		 764 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
765 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 766 break;
767
768 case HCISETLINKMODE:
e4e8e37c
MH		 769 hdev->link_mode = ((__u16) dr.dev_opt) &
770 (HCI_LM_MASTER | HCI_LM_ACCEPT);
771 break;
772
773 case HCISETPTYPE:
774 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 775 break;
776
777 case HCISETACLMTU:
e4e8e37c
MH		 778 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
779 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 780 break;
781
782 case HCISETSCOMTU:
e4e8e37c
MH		 783 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
784 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 785 break;
786
787 default:
788 err = -EINVAL;
789 break;
790 }
e4e8e37c 791
1da177e4
LT		 792 hci_dev_put(hdev);
793 return err;
794}
795
796int hci_get_dev_list(void __user *arg)
797{
798 struct hci_dev_list_req *dl;
799 struct hci_dev_req *dr;
800 struct list_head *p;
801 int n = 0, size, err;
802 __u16 dev_num;
803
804 if (get_user(dev_num, (__u16 __user *) arg))
805 return -EFAULT;
806
807 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
808 return -EINVAL;
809
810 size = sizeof(*dl) + dev_num * sizeof(*dr);
811
70f23020
AE		 812 dl = kzalloc(size, GFP_KERNEL);
813 if (!dl)
1da177e4
LT		 814 return -ENOMEM;
815
816 dr = dl->dev_req;
817
818 read_lock_bh(&hci_dev_list_lock);
819 list_for_each(p, &hci_dev_list) {
820 struct hci_dev *hdev;
c542a06c 821
1da177e4 822 hdev = list_entry(p, struct hci_dev, list);
c542a06c 823
ab81cbf9 824 hci_del_off_timer(hdev);
c542a06c
JH		 825
826 if (!test_bit(HCI_MGMT, &hdev->flags))
827 set_bit(HCI_PAIRABLE, &hdev->flags);
828
1da177e4
LT		 829 (dr + n)->dev_id = hdev->id;
830 (dr + n)->dev_opt = hdev->flags;
c542a06c 831
1da177e4
LT		 832 if (++n >= dev_num)
833 break;
834 }
835 read_unlock_bh(&hci_dev_list_lock);
836
837 dl->dev_num = n;
838 size = sizeof(*dl) + n * sizeof(*dr);
839
840 err = copy_to_user(arg, dl, size);
841 kfree(dl);
842
843 return err ? -EFAULT : 0;
844}
845
846int hci_get_dev_info(void __user *arg)
847{
848 struct hci_dev *hdev;
849 struct hci_dev_info di;
850 int err = 0;
851
852 if (copy_from_user(&di, arg, sizeof(di)))
853 return -EFAULT;
854
70f23020
AE		 855 hdev = hci_dev_get(di.dev_id);
856 if (!hdev)
1da177e4
LT		 857 return -ENODEV;
858
ab81cbf9
JH		 859 hci_del_off_timer(hdev);
860
c542a06c
JH		 861 if (!test_bit(HCI_MGMT, &hdev->flags))
862 set_bit(HCI_PAIRABLE, &hdev->flags);
863
1da177e4
LT		 864 strcpy(di.name, hdev->name);
865 di.bdaddr = hdev->bdaddr;
943da25d 866 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 867 di.flags = hdev->flags;
868 di.pkt_type = hdev->pkt_type;
869 di.acl_mtu = hdev->acl_mtu;
870 di.acl_pkts = hdev->acl_pkts;
871 di.sco_mtu = hdev->sco_mtu;
872 di.sco_pkts = hdev->sco_pkts;
873 di.link_policy = hdev->link_policy;
874 di.link_mode = hdev->link_mode;
875
876 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
877 memcpy(&di.features, &hdev->features, sizeof(di.features));
878
879 if (copy_to_user(arg, &di, sizeof(di)))
880 err = -EFAULT;
881
882 hci_dev_put(hdev);
883
884 return err;
885}
886
887/* ---- Interface to HCI drivers ---- */
888
611b30f7
MH		 889static int hci_rfkill_set_block(void *data, bool blocked)
890{
891 struct hci_dev *hdev = data;
892
893 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
894
895 if (!blocked)
896 return 0;
897
898 hci_dev_do_close(hdev);
899
900 return 0;
901}
902
903static const struct rfkill_ops hci_rfkill_ops = {
904 .set_block = hci_rfkill_set_block,
905};
906
1da177e4
LT		 907/* Alloc HCI device */
908struct hci_dev *hci_alloc_dev(void)
909{
910 struct hci_dev *hdev;
911
25ea6db0 912 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 913 if (!hdev)
914 return NULL;
915
1da177e4
LT		 916 skb_queue_head_init(&hdev->driver_init);
917
918 return hdev;
919}
920EXPORT_SYMBOL(hci_alloc_dev);
921
922/* Free HCI device */
923void hci_free_dev(struct hci_dev *hdev)
924{
925 skb_queue_purge(&hdev->driver_init);
926
a91f2e39
MH		 927 /* will free via device release */
928 put_device(&hdev->dev);
1da177e4
LT		 929}
930EXPORT_SYMBOL(hci_free_dev);
931
ab81cbf9
JH		 932static void hci_power_on(struct work_struct *work)
933{
934 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
935
936 BT_DBG("%s", hdev->name);
937
938 if (hci_dev_open(hdev->id) < 0)
939 return;
940
941 if (test_bit(HCI_AUTO_OFF, &hdev->flags))
942 mod_timer(&hdev->off_timer,
943 jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT));
944
945 if (test_and_clear_bit(HCI_SETUP, &hdev->flags))
946 mgmt_index_added(hdev->id);
947}
948
949static void hci_power_off(struct work_struct *work)
950{
951 struct hci_dev *hdev = container_of(work, struct hci_dev, power_off);
952
953 BT_DBG("%s", hdev->name);
954
955 hci_dev_close(hdev->id);
956}
957
958static void hci_auto_off(unsigned long data)
959{
960 struct hci_dev *hdev = (struct hci_dev *) data;
961
962 BT_DBG("%s", hdev->name);
963
964 clear_bit(HCI_AUTO_OFF, &hdev->flags);
965
966 queue_work(hdev->workqueue, &hdev->power_off);
967}
968
969void hci_del_off_timer(struct hci_dev *hdev)
970{
971 BT_DBG("%s", hdev->name);
972
973 clear_bit(HCI_AUTO_OFF, &hdev->flags);
974 del_timer(&hdev->off_timer);
975}
976
2aeb9a1a
JH		 977int hci_uuids_clear(struct hci_dev *hdev)
978{
979 struct list_head *p, *n;
980
981 list_for_each_safe(p, n, &hdev->uuids) {
982 struct bt_uuid *uuid;
983
984 uuid = list_entry(p, struct bt_uuid, list);
985
986 list_del(p);
987 kfree(uuid);
988 }
989
990 return 0;
991}
992
55ed8ca1
JH		 993int hci_link_keys_clear(struct hci_dev *hdev)
994{
995 struct list_head *p, *n;
996
997 list_for_each_safe(p, n, &hdev->link_keys) {
998 struct link_key *key;
999
1000 key = list_entry(p, struct link_key, list);
1001
1002 list_del(p);
1003 kfree(key);
1004 }
1005
1006 return 0;
1007}
1008
1009struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1010{
1011 struct list_head *p;
1012
1013 list_for_each(p, &hdev->link_keys) {
1014 struct link_key *k;
1015
1016 k = list_entry(p, struct link_key, list);
1017
1018 if (bacmp(bdaddr, &k->bdaddr) == 0)
1019 return k;
1020 }
1021
1022 return NULL;
1023}
1024
1025int hci_add_link_key(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
1026 u8 *val, u8 type, u8 pin_len)
1027{
1028 struct link_key *key, *old_key;
1029 u8 old_key_type;
1030
1031 old_key = hci_find_link_key(hdev, bdaddr);
1032 if (old_key) {
1033 old_key_type = old_key->type;
1034 key = old_key;
1035 } else {
1036 old_key_type = 0xff;
1037 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1038 if (!key)
1039 return -ENOMEM;
1040 list_add(&key->list, &hdev->link_keys);
1041 }
1042
1043 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1044
1045 bacpy(&key->bdaddr, bdaddr);
1046 memcpy(key->val, val, 16);
1047 key->type = type;
1048 key->pin_len = pin_len;
1049
1050 if (new_key)
1051 mgmt_new_key(hdev->id, key, old_key_type);
1052
1053 if (type == 0x06)
1054 key->type = old_key_type;
1055
1056 return 0;
1057}
1058
1059int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1060{
1061 struct link_key *key;
1062
1063 key = hci_find_link_key(hdev, bdaddr);
1064 if (!key)
1065 return -ENOENT;
1066
1067 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1068
1069 list_del(&key->list);
1070 kfree(key);
1071
1072 return 0;
1073}
1074
6bd32326
VT		 1075/* HCI command timer function */
1076static void hci_cmd_timer(unsigned long arg)
1077{
1078 struct hci_dev *hdev = (void *) arg;
1079
1080 BT_ERR("%s command tx timeout", hdev->name);
1081 atomic_set(&hdev->cmd_cnt, 1);
10572132 1082 clear_bit(HCI_RESET, &hdev->flags);
6bd32326
VT		 1083 tasklet_schedule(&hdev->cmd_task);
1084}
1085
2763eda6
SJ		 1086struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1087 bdaddr_t *bdaddr)
1088{
1089 struct oob_data *data;
1090
1091 list_for_each_entry(data, &hdev->remote_oob_data, list)
1092 if (bacmp(bdaddr, &data->bdaddr) == 0)
1093 return data;
1094
1095 return NULL;
1096}
1097
1098int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1099{
1100 struct oob_data *data;
1101
1102 data = hci_find_remote_oob_data(hdev, bdaddr);
1103 if (!data)
1104 return -ENOENT;
1105
1106 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1107
1108 list_del(&data->list);
1109 kfree(data);
1110
1111 return 0;
1112}
1113
1114int hci_remote_oob_data_clear(struct hci_dev *hdev)
1115{
1116 struct oob_data *data, *n;
1117
1118 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1119 list_del(&data->list);
1120 kfree(data);
1121 }
1122
1123 return 0;
1124}
1125
1126int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1127 u8 *randomizer)
1128{
1129 struct oob_data *data;
1130
1131 data = hci_find_remote_oob_data(hdev, bdaddr);
1132
1133 if (!data) {
1134 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1135 if (!data)
1136 return -ENOMEM;
1137
1138 bacpy(&data->bdaddr, bdaddr);
1139 list_add(&data->list, &hdev->remote_oob_data);
1140 }
1141
1142 memcpy(data->hash, hash, sizeof(data->hash));
1143 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1144
1145 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1146
1147 return 0;
1148}
1149
1da177e4
LT		 1150/* Register HCI device */
1151int hci_register_dev(struct hci_dev *hdev)
1152{
1153 struct list_head *head = &hci_dev_list, *p;
ef222013 1154 int i, id = 0;
1da177e4 1155
c13854ce
MH		 1156 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
1157 hdev->bus, hdev->owner);
1da177e4
LT		 1158
1159 if (!hdev->open || !hdev->close || !hdev->destruct)
1160 return -EINVAL;
1161
1162 write_lock_bh(&hci_dev_list_lock);
1163
1164 /* Find first available device id */
1165 list_for_each(p, &hci_dev_list) {
1166 if (list_entry(p, struct hci_dev, list)->id != id)
1167 break;
1168 head = p; id++;
1169 }
8e87d142 1170
1da177e4
LT		 1171 sprintf(hdev->name, "hci%d", id);
1172 hdev->id = id;
1173 list_add(&hdev->list, head);
1174
1175 atomic_set(&hdev->refcnt, 1);
1176 spin_lock_init(&hdev->lock);
1177
1178 hdev->flags = 0;
1179 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1180 hdev->esco_type = (ESCO_HV1);
1da177e4 1181 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1182 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1183
04837f64
MH		 1184 hdev->idle_timeout = 0;
1185 hdev->sniff_max_interval = 800;
1186 hdev->sniff_min_interval = 80;
1187
70f23020 1188 tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev);
1da177e4
LT		 1189 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
1190 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
1191
1192 skb_queue_head_init(&hdev->rx_q);
1193 skb_queue_head_init(&hdev->cmd_q);
1194 skb_queue_head_init(&hdev->raw_q);
1195
6bd32326
VT		 1196 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1197
cd4c5391 1198 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1199 hdev->reassembly[i] = NULL;
1200
1da177e4 1201 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1202 mutex_init(&hdev->req_lock);
1da177e4
LT		 1203
1204 inquiry_cache_init(hdev);
1205
1206 hci_conn_hash_init(hdev);
1207
ea4bd8ba 1208 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1209
2aeb9a1a
JH		 1210 INIT_LIST_HEAD(&hdev->uuids);
1211
55ed8ca1
JH		 1212 INIT_LIST_HEAD(&hdev->link_keys);
1213
2763eda6
SJ		 1214 INIT_LIST_HEAD(&hdev->remote_oob_data);
1215
ab81cbf9
JH		 1216 INIT_WORK(&hdev->power_on, hci_power_on);
1217 INIT_WORK(&hdev->power_off, hci_power_off);
1218 setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev);
1219
1da177e4
LT		 1220 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1221
1222 atomic_set(&hdev->promisc, 0);
1223
1224 write_unlock_bh(&hci_dev_list_lock);
1225
f48fd9c8
MH		 1226 hdev->workqueue = create_singlethread_workqueue(hdev->name);
1227 if (!hdev->workqueue)
1228 goto nomem;
1229
1da177e4
LT		 1230 hci_register_sysfs(hdev);
1231
611b30f7
MH		 1232 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1233 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1234 if (hdev->rfkill) {
1235 if (rfkill_register(hdev->rfkill) < 0) {
1236 rfkill_destroy(hdev->rfkill);
1237 hdev->rfkill = NULL;
1238 }
1239 }
1240
ab81cbf9
JH		 1241 set_bit(HCI_AUTO_OFF, &hdev->flags);
1242 set_bit(HCI_SETUP, &hdev->flags);
1243 queue_work(hdev->workqueue, &hdev->power_on);
1244
1da177e4
LT		 1245 hci_notify(hdev, HCI_DEV_REG);
1246
1247 return id;
f48fd9c8
MH		 1248
1249nomem:
1250 write_lock_bh(&hci_dev_list_lock);
1251 list_del(&hdev->list);
1252 write_unlock_bh(&hci_dev_list_lock);
1253
1254 return -ENOMEM;
1da177e4
LT		 1255}
1256EXPORT_SYMBOL(hci_register_dev);
1257
1258/* Unregister HCI device */
1259int hci_unregister_dev(struct hci_dev *hdev)
1260{
ef222013
MH		 1261 int i;
1262
c13854ce 1263 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1264
1da177e4
LT		 1265 write_lock_bh(&hci_dev_list_lock);
1266 list_del(&hdev->list);
1267 write_unlock_bh(&hci_dev_list_lock);
1268
1269 hci_dev_do_close(hdev);
1270
cd4c5391 1271 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1272 kfree_skb(hdev->reassembly[i]);
1273
ab81cbf9
JH		 1274 if (!test_bit(HCI_INIT, &hdev->flags) &&
1275 !test_bit(HCI_SETUP, &hdev->flags))
1276 mgmt_index_removed(hdev->id);
1277
1da177e4
LT		 1278 hci_notify(hdev, HCI_DEV_UNREG);
1279
611b30f7
MH		 1280 if (hdev->rfkill) {
1281 rfkill_unregister(hdev->rfkill);
1282 rfkill_destroy(hdev->rfkill);
1283 }
1284
147e2d59
DY		 1285 hci_unregister_sysfs(hdev);
1286
c6f3c5f7
GP		 1287 hci_del_off_timer(hdev);
1288
f48fd9c8
MH		 1289 destroy_workqueue(hdev->workqueue);
1290
e2e0cacb
JH		 1291 hci_dev_lock_bh(hdev);
1292 hci_blacklist_clear(hdev);
2aeb9a1a 1293 hci_uuids_clear(hdev);
55ed8ca1 1294 hci_link_keys_clear(hdev);
2763eda6 1295 hci_remote_oob_data_clear(hdev);
e2e0cacb
JH		 1296 hci_dev_unlock_bh(hdev);
1297
1da177e4 1298 __hci_dev_put(hdev);
ef222013 1299
1da177e4
LT		 1300 return 0;
1301}
1302EXPORT_SYMBOL(hci_unregister_dev);
1303
1304/* Suspend HCI device */
1305int hci_suspend_dev(struct hci_dev *hdev)
1306{
1307 hci_notify(hdev, HCI_DEV_SUSPEND);
1308 return 0;
1309}
1310EXPORT_SYMBOL(hci_suspend_dev);
1311
1312/* Resume HCI device */
1313int hci_resume_dev(struct hci_dev *hdev)
1314{
1315 hci_notify(hdev, HCI_DEV_RESUME);
1316 return 0;
1317}
1318EXPORT_SYMBOL(hci_resume_dev);
1319
76bca880
MH		 1320/* Receive frame from HCI drivers */
1321int hci_recv_frame(struct sk_buff *skb)
1322{
1323 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1324 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1325 && !test_bit(HCI_INIT, &hdev->flags))) {
1326 kfree_skb(skb);
1327 return -ENXIO;
1328 }
1329
1330 /* Incomming skb */
1331 bt_cb(skb)->incoming = 1;
1332
1333 /* Time stamp */
1334 __net_timestamp(skb);
1335
1336 /* Queue frame for rx task */
1337 skb_queue_tail(&hdev->rx_q, skb);
c78ae283
MH		 1338 tasklet_schedule(&hdev->rx_task);
1339
76bca880
MH		 1340 return 0;
1341}
1342EXPORT_SYMBOL(hci_recv_frame);
1343
33e882a5 1344static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1345 int count, __u8 index)
33e882a5
SS		 1346{
1347 int len = 0;
1348 int hlen = 0;
1349 int remain = count;
1350 struct sk_buff *skb;
1351 struct bt_skb_cb *scb;
1352
1353 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1354 index >= NUM_REASSEMBLY)
1355 return -EILSEQ;
1356
1357 skb = hdev->reassembly[index];
1358
1359 if (!skb) {
1360 switch (type) {
1361 case HCI_ACLDATA_PKT:
1362 len = HCI_MAX_FRAME_SIZE;
1363 hlen = HCI_ACL_HDR_SIZE;
1364 break;
1365 case HCI_EVENT_PKT:
1366 len = HCI_MAX_EVENT_SIZE;
1367 hlen = HCI_EVENT_HDR_SIZE;
1368 break;
1369 case HCI_SCODATA_PKT:
1370 len = HCI_MAX_SCO_SIZE;
1371 hlen = HCI_SCO_HDR_SIZE;
1372 break;
1373 }
1374
1e429f38 1375 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1376 if (!skb)
1377 return -ENOMEM;
1378
1379 scb = (void *) skb->cb;
1380 scb->expect = hlen;
1381 scb->pkt_type = type;
1382
1383 skb->dev = (void *) hdev;
1384 hdev->reassembly[index] = skb;
1385 }
1386
1387 while (count) {
1388 scb = (void *) skb->cb;
1389 len = min(scb->expect, (__u16)count);
1390
1391 memcpy(skb_put(skb, len), data, len);
1392
1393 count -= len;
1394 data += len;
1395 scb->expect -= len;
1396 remain = count;
1397
1398 switch (type) {
1399 case HCI_EVENT_PKT:
1400 if (skb->len == HCI_EVENT_HDR_SIZE) {
1401 struct hci_event_hdr *h = hci_event_hdr(skb);
1402 scb->expect = h->plen;
1403
1404 if (skb_tailroom(skb) < scb->expect) {
1405 kfree_skb(skb);
1406 hdev->reassembly[index] = NULL;
1407 return -ENOMEM;
1408 }
1409 }
1410 break;
1411
1412 case HCI_ACLDATA_PKT:
1413 if (skb->len == HCI_ACL_HDR_SIZE) {
1414 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1415 scb->expect = __le16_to_cpu(h->dlen);
1416
1417 if (skb_tailroom(skb) < scb->expect) {
1418 kfree_skb(skb);
1419 hdev->reassembly[index] = NULL;
1420 return -ENOMEM;
1421 }
1422 }
1423 break;
1424
1425 case HCI_SCODATA_PKT:
1426 if (skb->len == HCI_SCO_HDR_SIZE) {
1427 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1428 scb->expect = h->dlen;
1429
1430 if (skb_tailroom(skb) < scb->expect) {
1431 kfree_skb(skb);
1432 hdev->reassembly[index] = NULL;
1433 return -ENOMEM;
1434 }
1435 }
1436 break;
1437 }
1438
1439 if (scb->expect == 0) {
1440 /* Complete frame */
1441
1442 bt_cb(skb)->pkt_type = type;
1443 hci_recv_frame(skb);
1444
1445 hdev->reassembly[index] = NULL;
1446 return remain;
1447 }
1448 }
1449
1450 return remain;
1451}
1452
ef222013
MH		 1453int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1454{
f39a3c06
SS		 1455 int rem = 0;
1456
ef222013
MH		 1457 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1458 return -EILSEQ;
1459
da5f6c37 1460 while (count) {
1e429f38 1461 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1462 if (rem < 0)
1463 return rem;
ef222013 1464
f39a3c06
SS		 1465 data += (count - rem);
1466 count = rem;
da5f6c37 1467 };
ef222013 1468
f39a3c06 1469 return rem;
ef222013
MH		 1470}
1471EXPORT_SYMBOL(hci_recv_fragment);
1472
99811510
SS		 1473#define STREAM_REASSEMBLY 0
1474
1475int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1476{
1477 int type;
1478 int rem = 0;
1479
da5f6c37 1480 while (count) {
99811510
SS		 1481 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1482
1483 if (!skb) {
1484 struct { char type; } *pkt;
1485
1486 /* Start of the frame */
1487 pkt = data;
1488 type = pkt->type;
1489
1490 data++;
1491 count--;
1492 } else
1493 type = bt_cb(skb)->pkt_type;
1494
1e429f38
GP		 1495 rem = hci_reassembly(hdev, type, data, count,
1496 STREAM_REASSEMBLY);
99811510
SS		 1497 if (rem < 0)
1498 return rem;
1499
1500 data += (count - rem);
1501 count = rem;
da5f6c37 1502 };
99811510
SS		 1503
1504 return rem;
1505}
1506EXPORT_SYMBOL(hci_recv_stream_fragment);
1507
1da177e4
LT		 1508/* ---- Interface to upper protocols ---- */
1509
1510/* Register/Unregister protocols.
1511 * hci_task_lock is used to ensure that no tasks are running. */
1512int hci_register_proto(struct hci_proto *hp)
1513{
1514 int err = 0;
1515
1516 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1517
1518 if (hp->id >= HCI_MAX_PROTO)
1519 return -EINVAL;
1520
1521 write_lock_bh(&hci_task_lock);
1522
1523 if (!hci_proto[hp->id])
1524 hci_proto[hp->id] = hp;
1525 else
1526 err = -EEXIST;
1527
1528 write_unlock_bh(&hci_task_lock);
1529
1530 return err;
1531}
1532EXPORT_SYMBOL(hci_register_proto);
1533
1534int hci_unregister_proto(struct hci_proto *hp)
1535{
1536 int err = 0;
1537
1538 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1539
1540 if (hp->id >= HCI_MAX_PROTO)
1541 return -EINVAL;
1542
1543 write_lock_bh(&hci_task_lock);
1544
1545 if (hci_proto[hp->id])
1546 hci_proto[hp->id] = NULL;
1547 else
1548 err = -ENOENT;
1549
1550 write_unlock_bh(&hci_task_lock);
1551
1552 return err;
1553}
1554EXPORT_SYMBOL(hci_unregister_proto);
1555
1556int hci_register_cb(struct hci_cb *cb)
1557{
1558 BT_DBG("%p name %s", cb, cb->name);
1559
1560 write_lock_bh(&hci_cb_list_lock);
1561 list_add(&cb->list, &hci_cb_list);
1562 write_unlock_bh(&hci_cb_list_lock);
1563
1564 return 0;
1565}
1566EXPORT_SYMBOL(hci_register_cb);
1567
1568int hci_unregister_cb(struct hci_cb *cb)
1569{
1570 BT_DBG("%p name %s", cb, cb->name);
1571
1572 write_lock_bh(&hci_cb_list_lock);
1573 list_del(&cb->list);
1574 write_unlock_bh(&hci_cb_list_lock);
1575
1576 return 0;
1577}
1578EXPORT_SYMBOL(hci_unregister_cb);
1579
1580static int hci_send_frame(struct sk_buff *skb)
1581{
1582 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1583
1584 if (!hdev) {
1585 kfree_skb(skb);
1586 return -ENODEV;
1587 }
1588
0d48d939 1589 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4
LT		 1590
1591 if (atomic_read(&hdev->promisc)) {
1592 /* Time stamp */
a61bbcf2 1593 __net_timestamp(skb);
1da177e4 1594
eec8d2bc 1595 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 1596 }
1597
1598 /* Get rid of skb owner, prior to sending to the driver. */
1599 skb_orphan(skb);
1600
1601 return hdev->send(skb);
1602}
1603
1604/* Send HCI command */
a9de9248 1605int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 1606{
1607 int len = HCI_COMMAND_HDR_SIZE + plen;
1608 struct hci_command_hdr *hdr;
1609 struct sk_buff *skb;
1610
a9de9248 1611 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 1612
1613 skb = bt_skb_alloc(len, GFP_ATOMIC);
1614 if (!skb) {
ef222013 1615 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 1616 return -ENOMEM;
1617 }
1618
1619 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 1620 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 1621 hdr->plen = plen;
1622
1623 if (plen)
1624 memcpy(skb_put(skb, plen), param, plen);
1625
1626 BT_DBG("skb len %d", skb->len);
1627
0d48d939 1628 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 1629 skb->dev = (void *) hdev;
c78ae283 1630
a5040efa
JH		 1631 if (test_bit(HCI_INIT, &hdev->flags))
1632 hdev->init_last_cmd = opcode;
1633
1da177e4 1634 skb_queue_tail(&hdev->cmd_q, skb);
c78ae283 1635 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 1636
1637 return 0;
1638}
1da177e4
LT		 1639
1640/* Get data from the previously sent command */
a9de9248 1641void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 1642{
1643 struct hci_command_hdr *hdr;
1644
1645 if (!hdev->sent_cmd)
1646 return NULL;
1647
1648 hdr = (void *) hdev->sent_cmd->data;
1649
a9de9248 1650 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 1651 return NULL;
1652
a9de9248 1653 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 1654
1655 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1656}
1657
1658/* Send ACL data */
1659static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1660{
1661 struct hci_acl_hdr *hdr;
1662 int len = skb->len;
1663
badff6d0
ACM		 1664 skb_push(skb, HCI_ACL_HDR_SIZE);
1665 skb_reset_transport_header(skb);
9c70220b 1666 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 1667 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1668 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 1669}
1670
9a9c6a34 1671void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1da177e4
LT		 1672{
1673 struct hci_dev *hdev = conn->hdev;
1674 struct sk_buff *list;
1675
1676 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1677
1678 skb->dev = (void *) hdev;
0d48d939 1679 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 1680 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4 1681
70f23020
AE		 1682 list = skb_shinfo(skb)->frag_list;
1683 if (!list) {
1da177e4
LT		 1684 /* Non fragmented */
1685 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1686
1687 skb_queue_tail(&conn->data_q, skb);
1688 } else {
1689 /* Fragmented */
1690 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1691
1692 skb_shinfo(skb)->frag_list = NULL;
1693
1694 /* Queue all fragments atomically */
1695 spin_lock_bh(&conn->data_q.lock);
1696
1697 __skb_queue_tail(&conn->data_q, skb);
e702112f
AE		 1698
1699 flags &= ~ACL_START;
1700 flags |= ACL_CONT;
1da177e4
LT		 1701 do {
1702 skb = list; list = list->next;
8e87d142 1703
1da177e4 1704 skb->dev = (void *) hdev;
0d48d939 1705 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 1706 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 1707
1708 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1709
1710 __skb_queue_tail(&conn->data_q, skb);
1711 } while (list);
1712
1713 spin_unlock_bh(&conn->data_q.lock);
1714 }
1715
c78ae283 1716 tasklet_schedule(&hdev->tx_task);
1da177e4
LT		 1717}
1718EXPORT_SYMBOL(hci_send_acl);
1719
1720/* Send SCO data */
0d861d8b 1721void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 1722{
1723 struct hci_dev *hdev = conn->hdev;
1724 struct hci_sco_hdr hdr;
1725
1726 BT_DBG("%s len %d", hdev->name, skb->len);
1727
aca3192c 1728 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 1729 hdr.dlen = skb->len;
1730
badff6d0
ACM		 1731 skb_push(skb, HCI_SCO_HDR_SIZE);
1732 skb_reset_transport_header(skb);
9c70220b 1733 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 1734
1735 skb->dev = (void *) hdev;
0d48d939 1736 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 1737
1da177e4 1738 skb_queue_tail(&conn->data_q, skb);
c78ae283 1739 tasklet_schedule(&hdev->tx_task);
1da177e4
LT		 1740}
1741EXPORT_SYMBOL(hci_send_sco);
1742
1743/* ---- HCI TX task (outgoing data) ---- */
1744
1745/* HCI Connection scheduler */
1746static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
1747{
1748 struct hci_conn_hash *h = &hdev->conn_hash;
5b7f9909 1749 struct hci_conn *conn = NULL;
1da177e4
LT		 1750 int num = 0, min = ~0;
1751 struct list_head *p;
1752
8e87d142 1753 /* We don't have to lock device here. Connections are always
1da177e4
LT		 1754 * added and removed with TX task disabled. */
1755 list_for_each(p, &h->list) {
1756 struct hci_conn *c;
1757 c = list_entry(p, struct hci_conn, list);
1758
769be974 1759 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 1760 continue;
769be974
MH		 1761
1762 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
1763 continue;
1764
1da177e4
LT		 1765 num++;
1766
1767 if (c->sent < min) {
1768 min = c->sent;
1769 conn = c;
1770 }
1771 }
1772
1773 if (conn) {
6ed58ec5
VT		 1774 int cnt, q;
1775
1776 switch (conn->type) {
1777 case ACL_LINK:
1778 cnt = hdev->acl_cnt;
1779 break;
1780 case SCO_LINK:
1781 case ESCO_LINK:
1782 cnt = hdev->sco_cnt;
1783 break;
1784 case LE_LINK:
1785 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
1786 break;
1787 default:
1788 cnt = 0;
1789 BT_ERR("Unknown link type");
1790 }
1791
1792 q = cnt / num;
1da177e4
LT		 1793 *quote = q ? q : 1;
1794 } else
1795 *quote = 0;
1796
1797 BT_DBG("conn %p quote %d", conn, *quote);
1798 return conn;
1799}
1800
bae1f5d9 1801static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 1802{
1803 struct hci_conn_hash *h = &hdev->conn_hash;
1804 struct list_head *p;
1805 struct hci_conn *c;
1806
bae1f5d9 1807 BT_ERR("%s link tx timeout", hdev->name);
1da177e4
LT		 1808
1809 /* Kill stalled connections */
1810 list_for_each(p, &h->list) {
1811 c = list_entry(p, struct hci_conn, list);
bae1f5d9
VT		 1812 if (c->type == type && c->sent) {
1813 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 1814 hdev->name, batostr(&c->dst));
1815 hci_acl_disconn(c, 0x13);
1816 }
1817 }
1818}
1819
1820static inline void hci_sched_acl(struct hci_dev *hdev)
1821{
1822 struct hci_conn *conn;
1823 struct sk_buff *skb;
1824 int quote;
1825
1826 BT_DBG("%s", hdev->name);
1827
1828 if (!test_bit(HCI_RAW, &hdev->flags)) {
1829 /* ACL tx timeout must be longer than maximum
1830 * link supervision timeout (40.9 seconds) */
82453021 1831 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
bae1f5d9 1832 hci_link_tx_to(hdev, ACL_LINK);
1da177e4
LT		 1833 }
1834
1835 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
1836 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1837 BT_DBG("skb %p len %d", skb, skb->len);
04837f64
MH		 1838
1839 hci_conn_enter_active_mode(conn);
1840
1da177e4
LT		 1841 hci_send_frame(skb);
1842 hdev->acl_last_tx = jiffies;
1843
1844 hdev->acl_cnt--;
1845 conn->sent++;
1846 }
1847 }
1848}
1849
1850/* Schedule SCO */
1851static inline void hci_sched_sco(struct hci_dev *hdev)
1852{
1853 struct hci_conn *conn;
1854 struct sk_buff *skb;
1855 int quote;
1856
1857 BT_DBG("%s", hdev->name);
1858
1859 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
1860 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1861 BT_DBG("skb %p len %d", skb, skb->len);
1862 hci_send_frame(skb);
1863
1864 conn->sent++;
1865 if (conn->sent == ~0)
1866 conn->sent = 0;
1867 }
1868 }
1869}
1870
b6a0dc82
MH		 1871static inline void hci_sched_esco(struct hci_dev *hdev)
1872{
1873 struct hci_conn *conn;
1874 struct sk_buff *skb;
1875 int quote;
1876
1877 BT_DBG("%s", hdev->name);
1878
1879 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
1880 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1881 BT_DBG("skb %p len %d", skb, skb->len);
1882 hci_send_frame(skb);
1883
1884 conn->sent++;
1885 if (conn->sent == ~0)
1886 conn->sent = 0;
1887 }
1888 }
1889}
1890
6ed58ec5
VT		 1891static inline void hci_sched_le(struct hci_dev *hdev)
1892{
1893 struct hci_conn *conn;
1894 struct sk_buff *skb;
1895 int quote, cnt;
1896
1897 BT_DBG("%s", hdev->name);
1898
1899 if (!test_bit(HCI_RAW, &hdev->flags)) {
1900 /* LE tx timeout must be longer than maximum
1901 * link supervision timeout (40.9 seconds) */
bae1f5d9 1902 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 1903 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 1904 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 1905 }
1906
1907 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
1908 while (cnt && (conn = hci_low_sent(hdev, LE_LINK, &quote))) {
1909 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
1910 BT_DBG("skb %p len %d", skb, skb->len);
1911
1912 hci_send_frame(skb);
1913 hdev->le_last_tx = jiffies;
1914
1915 cnt--;
1916 conn->sent++;
1917 }
1918 }
1919 if (hdev->le_pkts)
1920 hdev->le_cnt = cnt;
1921 else
1922 hdev->acl_cnt = cnt;
1923}
1924
1da177e4
LT		 1925static void hci_tx_task(unsigned long arg)
1926{
1927 struct hci_dev *hdev = (struct hci_dev *) arg;
1928 struct sk_buff *skb;
1929
1930 read_lock(&hci_task_lock);
1931
6ed58ec5
VT		 1932 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
1933 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 1934
1935 /* Schedule queues and send stuff to HCI driver */
1936
1937 hci_sched_acl(hdev);
1938
1939 hci_sched_sco(hdev);
1940
b6a0dc82
MH		 1941 hci_sched_esco(hdev);
1942
6ed58ec5
VT		 1943 hci_sched_le(hdev);
1944
1da177e4
LT		 1945 /* Send next queued raw (unknown type) packet */
1946 while ((skb = skb_dequeue(&hdev->raw_q)))
1947 hci_send_frame(skb);
1948
1949 read_unlock(&hci_task_lock);
1950}
1951
1952/* ----- HCI RX task (incoming data proccessing) ----- */
1953
1954/* ACL data packet */
1955static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1956{
1957 struct hci_acl_hdr *hdr = (void *) skb->data;
1958 struct hci_conn *conn;
1959 __u16 handle, flags;
1960
1961 skb_pull(skb, HCI_ACL_HDR_SIZE);
1962
1963 handle = __le16_to_cpu(hdr->handle);
1964 flags = hci_flags(handle);
1965 handle = hci_handle(handle);
1966
1967 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
1968
1969 hdev->stat.acl_rx++;
1970
1971 hci_dev_lock(hdev);
1972 conn = hci_conn_hash_lookup_handle(hdev, handle);
1973 hci_dev_unlock(hdev);
8e87d142 1974
1da177e4
LT		 1975 if (conn) {
1976 register struct hci_proto *hp;
1977
04837f64
MH		 1978 hci_conn_enter_active_mode(conn);
1979
1da177e4 1980 /* Send to upper protocol */
70f23020
AE		 1981 hp = hci_proto[HCI_PROTO_L2CAP];
1982 if (hp && hp->recv_acldata) {
1da177e4
LT		 1983 hp->recv_acldata(conn, skb, flags);
1984 return;
1985 }
1986 } else {
8e87d142 1987 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 1988 hdev->name, handle);
1989 }
1990
1991 kfree_skb(skb);
1992}
1993
1994/* SCO data packet */
1995static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1996{
1997 struct hci_sco_hdr *hdr = (void *) skb->data;
1998 struct hci_conn *conn;
1999 __u16 handle;
2000
2001 skb_pull(skb, HCI_SCO_HDR_SIZE);
2002
2003 handle = __le16_to_cpu(hdr->handle);
2004
2005 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2006
2007 hdev->stat.sco_rx++;
2008
2009 hci_dev_lock(hdev);
2010 conn = hci_conn_hash_lookup_handle(hdev, handle);
2011 hci_dev_unlock(hdev);
2012
2013 if (conn) {
2014 register struct hci_proto *hp;
2015
2016 /* Send to upper protocol */
70f23020
AE		 2017 hp = hci_proto[HCI_PROTO_SCO];
2018 if (hp && hp->recv_scodata) {
1da177e4
LT		 2019 hp->recv_scodata(conn, skb);
2020 return;
2021 }
2022 } else {
8e87d142 2023 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2024 hdev->name, handle);
2025 }
2026
2027 kfree_skb(skb);
2028}
2029
6516455d 2030static void hci_rx_task(unsigned long arg)
1da177e4
LT		 2031{
2032 struct hci_dev *hdev = (struct hci_dev *) arg;
2033 struct sk_buff *skb;
2034
2035 BT_DBG("%s", hdev->name);
2036
2037 read_lock(&hci_task_lock);
2038
2039 while ((skb = skb_dequeue(&hdev->rx_q))) {
2040 if (atomic_read(&hdev->promisc)) {
2041 /* Send copy to the sockets */
eec8d2bc 2042 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 2043 }
2044
2045 if (test_bit(HCI_RAW, &hdev->flags)) {
2046 kfree_skb(skb);
2047 continue;
2048 }
2049
2050 if (test_bit(HCI_INIT, &hdev->flags)) {
2051 /* Don't process data packets in this states. */
0d48d939 2052 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2053 case HCI_ACLDATA_PKT:
2054 case HCI_SCODATA_PKT:
2055 kfree_skb(skb);
2056 continue;
3ff50b79 2057 }
1da177e4
LT		 2058 }
2059
2060 /* Process frame */
0d48d939 2061 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2062 case HCI_EVENT_PKT:
2063 hci_event_packet(hdev, skb);
2064 break;
2065
2066 case HCI_ACLDATA_PKT:
2067 BT_DBG("%s ACL data packet", hdev->name);
2068 hci_acldata_packet(hdev, skb);
2069 break;
2070
2071 case HCI_SCODATA_PKT:
2072 BT_DBG("%s SCO data packet", hdev->name);
2073 hci_scodata_packet(hdev, skb);
2074 break;
2075
2076 default:
2077 kfree_skb(skb);
2078 break;
2079 }
2080 }
2081
2082 read_unlock(&hci_task_lock);
2083}
2084
2085static void hci_cmd_task(unsigned long arg)
2086{
2087 struct hci_dev *hdev = (struct hci_dev *) arg;
2088 struct sk_buff *skb;
2089
2090 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2091
1da177e4 2092 /* Send queued commands */
5a08ecce
AE		 2093 if (atomic_read(&hdev->cmd_cnt)) {
2094 skb = skb_dequeue(&hdev->cmd_q);
2095 if (!skb)
2096 return;
2097
7585b97a 2098 kfree_skb(hdev->sent_cmd);
1da177e4 2099
70f23020
AE		 2100 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2101 if (hdev->sent_cmd) {
1da177e4
LT		 2102 atomic_dec(&hdev->cmd_cnt);
2103 hci_send_frame(skb);
6bd32326
VT		 2104 mod_timer(&hdev->cmd_timer,
2105 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2106 } else {
2107 skb_queue_head(&hdev->cmd_q, skb);
c78ae283 2108 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 2109 }
2110 }
2111}
kernel source for telekom puls (alcatel/mediatek)