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Merge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
[deliverable/linux.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>
3a0259bb 45#include <linux/crypto.h>
1da177e4
LT		 46#include <net/sock.h>
47
48#include <asm/system.h>
70f23020 49#include <linux/uaccess.h>
1da177e4
LT		 50#include <asm/unaligned.h>
51
52#include <net/bluetooth/bluetooth.h>
53#include <net/bluetooth/hci_core.h>
54
ab81cbf9
JH		 55#define AUTO_OFF_TIMEOUT 2000
56
1da177e4
LT		 57static void hci_cmd_task(unsigned long arg);
58static void hci_rx_task(unsigned long arg);
59static void hci_tx_task(unsigned long arg);
1da177e4
LT		 60
61static DEFINE_RWLOCK(hci_task_lock);
62
63/* HCI device list */
64LIST_HEAD(hci_dev_list);
65DEFINE_RWLOCK(hci_dev_list_lock);
66
67/* HCI callback list */
68LIST_HEAD(hci_cb_list);
69DEFINE_RWLOCK(hci_cb_list_lock);
70
71/* HCI protocols */
72#define HCI_MAX_PROTO 2
73struct hci_proto *hci_proto[HCI_MAX_PROTO];
74
75/* HCI notifiers list */
e041c683 76static ATOMIC_NOTIFIER_HEAD(hci_notifier);
1da177e4
LT		 77
78/* ---- HCI notifications ---- */
79
80int hci_register_notifier(struct notifier_block *nb)
81{
e041c683 82 return atomic_notifier_chain_register(&hci_notifier, nb);
1da177e4
LT		 83}
84
85int hci_unregister_notifier(struct notifier_block *nb)
86{
e041c683 87 return atomic_notifier_chain_unregister(&hci_notifier, nb);
1da177e4
LT		 88}
89
6516455d 90static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 91{
e041c683 92 atomic_notifier_call_chain(&hci_notifier, event, hdev);
1da177e4
LT		 93}
94
95/* ---- HCI requests ---- */
96
23bb5763 97void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 98{
23bb5763
JH		 99 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
100
a5040efa
JH		 101 /* If this is the init phase check if the completed command matches
102 * the last init command, and if not just return.
103 */
104 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
23bb5763 105 return;
1da177e4
LT		 106
107 if (hdev->req_status == HCI_REQ_PEND) {
108 hdev->req_result = result;
109 hdev->req_status = HCI_REQ_DONE;
110 wake_up_interruptible(&hdev->req_wait_q);
111 }
112}
113
114static void hci_req_cancel(struct hci_dev *hdev, int err)
115{
116 BT_DBG("%s err 0x%2.2x", hdev->name, err);
117
118 if (hdev->req_status == HCI_REQ_PEND) {
119 hdev->req_result = err;
120 hdev->req_status = HCI_REQ_CANCELED;
121 wake_up_interruptible(&hdev->req_wait_q);
122 }
123}
124
125/* Execute request and wait for completion. */
8e87d142 126static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 127 unsigned long opt, __u32 timeout)
1da177e4
LT		 128{
129 DECLARE_WAITQUEUE(wait, current);
130 int err = 0;
131
132 BT_DBG("%s start", hdev->name);
133
134 hdev->req_status = HCI_REQ_PEND;
135
136 add_wait_queue(&hdev->req_wait_q, &wait);
137 set_current_state(TASK_INTERRUPTIBLE);
138
139 req(hdev, opt);
140 schedule_timeout(timeout);
141
142 remove_wait_queue(&hdev->req_wait_q, &wait);
143
144 if (signal_pending(current))
145 return -EINTR;
146
147 switch (hdev->req_status) {
148 case HCI_REQ_DONE:
e175072f 149 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 150 break;
151
152 case HCI_REQ_CANCELED:
153 err = -hdev->req_result;
154 break;
155
156 default:
157 err = -ETIMEDOUT;
158 break;
3ff50b79 159 }
1da177e4 160
a5040efa 161 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 162
163 BT_DBG("%s end: err %d", hdev->name, err);
164
165 return err;
166}
167
168static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 169 unsigned long opt, __u32 timeout)
1da177e4
LT		 170{
171 int ret;
172
7c6a329e
MH		 173 if (!test_bit(HCI_UP, &hdev->flags))
174 return -ENETDOWN;
175
1da177e4
LT		 176 /* Serialize all requests */
177 hci_req_lock(hdev);
178 ret = __hci_request(hdev, req, opt, timeout);
179 hci_req_unlock(hdev);
180
181 return ret;
182}
183
184static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
185{
186 BT_DBG("%s %ld", hdev->name, opt);
187
188 /* Reset device */
f630cf0d 189 set_bit(HCI_RESET, &hdev->flags);
a9de9248 190 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 191}
192
193static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
194{
b0916ea0 195 struct hci_cp_delete_stored_link_key cp;
1da177e4 196 struct sk_buff *skb;
1ebb9252 197 __le16 param;
89f2783d 198 __u8 flt_type;
1da177e4
LT		 199
200 BT_DBG("%s %ld", hdev->name, opt);
201
202 /* Driver initialization */
203
204 /* Special commands */
205 while ((skb = skb_dequeue(&hdev->driver_init))) {
0d48d939 206 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 207 skb->dev = (void *) hdev;
c78ae283 208
1da177e4 209 skb_queue_tail(&hdev->cmd_q, skb);
c78ae283 210 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 211 }
212 skb_queue_purge(&hdev->driver_init);
213
214 /* Mandatory initialization */
215
216 /* Reset */
f630cf0d
GP		 217 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
218 set_bit(HCI_RESET, &hdev->flags);
a9de9248 219 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 220 }
1da177e4
LT		 221
222 /* Read Local Supported Features */
a9de9248 223 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 224
1143e5a6 225 /* Read Local Version */
a9de9248 226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 227
1da177e4 228 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 229 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4
LT		 230
231#if 0
232 /* Host buffer size */
233 {
234 struct hci_cp_host_buffer_size cp;
aca3192c 235 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
1da177e4 236 cp.sco_mtu = HCI_MAX_SCO_SIZE;
aca3192c
YH		 237 cp.acl_max_pkt = cpu_to_le16(0xffff);
238 cp.sco_max_pkt = cpu_to_le16(0xffff);
a9de9248 239 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
1da177e4
LT		 240 }
241#endif
242
243 /* Read BD Address */
a9de9248
MH		 244 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
245
246 /* Read Class of Device */
247 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
248
249 /* Read Local Name */
250 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 251
252 /* Read Voice Setting */
a9de9248 253 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 254
255 /* Optional initialization */
256
257 /* Clear Event Filters */
89f2783d 258 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 259 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 260
1da177e4 261 /* Connection accept timeout ~20 secs */
aca3192c 262 param = cpu_to_le16(0x7d00);
a9de9248 263 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 264
265 bacpy(&cp.bdaddr, BDADDR_ANY);
266 cp.delete_all = 1;
267 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 268}
269
6ed58ec5
VT		 270static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
271{
272 BT_DBG("%s", hdev->name);
273
274 /* Read LE buffer size */
275 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
276}
277
1da177e4
LT		 278static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
279{
280 __u8 scan = opt;
281
282 BT_DBG("%s %x", hdev->name, scan);
283
284 /* Inquiry and Page scans */
a9de9248 285 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 286}
287
288static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
289{
290 __u8 auth = opt;
291
292 BT_DBG("%s %x", hdev->name, auth);
293
294 /* Authentication */
a9de9248 295 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 296}
297
298static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
299{
300 __u8 encrypt = opt;
301
302 BT_DBG("%s %x", hdev->name, encrypt);
303
e4e8e37c 304 /* Encryption */
a9de9248 305 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 306}
307
e4e8e37c
MH		 308static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
309{
310 __le16 policy = cpu_to_le16(opt);
311
a418b893 312 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 313
314 /* Default link policy */
315 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
316}
317
8e87d142 318/* Get HCI device by index.
1da177e4
LT		 319 * Device is held on return. */
320struct hci_dev *hci_dev_get(int index)
321{
322 struct hci_dev *hdev = NULL;
323 struct list_head *p;
324
325 BT_DBG("%d", index);
326
327 if (index < 0)
328 return NULL;
329
330 read_lock(&hci_dev_list_lock);
331 list_for_each(p, &hci_dev_list) {
332 struct hci_dev *d = list_entry(p, struct hci_dev, list);
333 if (d->id == index) {
334 hdev = hci_dev_hold(d);
335 break;
336 }
337 }
338 read_unlock(&hci_dev_list_lock);
339 return hdev;
340}
1da177e4
LT		 341
342/* ---- Inquiry support ---- */
343static void inquiry_cache_flush(struct hci_dev *hdev)
344{
345 struct inquiry_cache *cache = &hdev->inq_cache;
346 struct inquiry_entry *next = cache->list, *e;
347
348 BT_DBG("cache %p", cache);
349
350 cache->list = NULL;
351 while ((e = next)) {
352 next = e->next;
353 kfree(e);
354 }
355}
356
357struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
358{
359 struct inquiry_cache *cache = &hdev->inq_cache;
360 struct inquiry_entry *e;
361
362 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
363
364 for (e = cache->list; e; e = e->next)
365 if (!bacmp(&e->data.bdaddr, bdaddr))
366 break;
367 return e;
368}
369
370void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
371{
372 struct inquiry_cache *cache = &hdev->inq_cache;
70f23020 373 struct inquiry_entry *ie;
1da177e4
LT		 374
375 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
376
70f23020
AE		 377 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
378 if (!ie) {
1da177e4 379 /* Entry not in the cache. Add new one. */
70f23020
AE		 380 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
381 if (!ie)
1da177e4 382 return;
70f23020
AE		 383
384 ie->next = cache->list;
385 cache->list = ie;
1da177e4
LT		 386 }
387
70f23020
AE		 388 memcpy(&ie->data, data, sizeof(*data));
389 ie->timestamp = jiffies;
1da177e4
LT		 390 cache->timestamp = jiffies;
391}
392
393static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
394{
395 struct inquiry_cache *cache = &hdev->inq_cache;
396 struct inquiry_info *info = (struct inquiry_info *) buf;
397 struct inquiry_entry *e;
398 int copied = 0;
399
400 for (e = cache->list; e && copied < num; e = e->next, copied++) {
401 struct inquiry_data *data = &e->data;
402 bacpy(&info->bdaddr, &data->bdaddr);
403 info->pscan_rep_mode = data->pscan_rep_mode;
404 info->pscan_period_mode = data->pscan_period_mode;
405 info->pscan_mode = data->pscan_mode;
406 memcpy(info->dev_class, data->dev_class, 3);
407 info->clock_offset = data->clock_offset;
408 info++;
409 }
410
411 BT_DBG("cache %p, copied %d", cache, copied);
412 return copied;
413}
414
415static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
416{
417 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
418 struct hci_cp_inquiry cp;
419
420 BT_DBG("%s", hdev->name);
421
422 if (test_bit(HCI_INQUIRY, &hdev->flags))
423 return;
424
425 /* Start Inquiry */
426 memcpy(&cp.lap, &ir->lap, 3);
427 cp.length = ir->length;
428 cp.num_rsp = ir->num_rsp;
a9de9248 429 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 430}
431
432int hci_inquiry(void __user *arg)
433{
434 __u8 __user *ptr = arg;
435 struct hci_inquiry_req ir;
436 struct hci_dev *hdev;
437 int err = 0, do_inquiry = 0, max_rsp;
438 long timeo;
439 __u8 *buf;
440
441 if (copy_from_user(&ir, ptr, sizeof(ir)))
442 return -EFAULT;
443
5a08ecce
AE		 444 hdev = hci_dev_get(ir.dev_id);
445 if (!hdev)
1da177e4
LT		 446 return -ENODEV;
447
448 hci_dev_lock_bh(hdev);
8e87d142 449 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 450 inquiry_cache_empty(hdev) ||
451 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 452 inquiry_cache_flush(hdev);
453 do_inquiry = 1;
454 }
455 hci_dev_unlock_bh(hdev);
456
04837f64 457 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 458
459 if (do_inquiry) {
460 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
461 if (err < 0)
462 goto done;
463 }
1da177e4
LT		 464
465 /* for unlimited number of responses we will use buffer with 255 entries */
466 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
467
468 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
469 * copy it to the user space.
470 */
01df8c31 471 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 472 if (!buf) {
1da177e4
LT		 473 err = -ENOMEM;
474 goto done;
475 }
476
477 hci_dev_lock_bh(hdev);
478 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
479 hci_dev_unlock_bh(hdev);
480
481 BT_DBG("num_rsp %d", ir.num_rsp);
482
483 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
484 ptr += sizeof(ir);
485 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
486 ir.num_rsp))
487 err = -EFAULT;
8e87d142 488 } else
1da177e4
LT		 489 err = -EFAULT;
490
491 kfree(buf);
492
493done:
494 hci_dev_put(hdev);
495 return err;
496}
497
498/* ---- HCI ioctl helpers ---- */
499
500int hci_dev_open(__u16 dev)
501{
502 struct hci_dev *hdev;
503 int ret = 0;
504
5a08ecce
AE		 505 hdev = hci_dev_get(dev);
506 if (!hdev)
1da177e4
LT		 507 return -ENODEV;
508
509 BT_DBG("%s %p", hdev->name, hdev);
510
511 hci_req_lock(hdev);
512
611b30f7
MH		 513 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
514 ret = -ERFKILL;
515 goto done;
516 }
517
1da177e4
LT		 518 if (test_bit(HCI_UP, &hdev->flags)) {
519 ret = -EALREADY;
520 goto done;
521 }
522
523 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
524 set_bit(HCI_RAW, &hdev->flags);
525
943da25d
MH		 526 /* Treat all non BR/EDR controllers as raw devices for now */
527 if (hdev->dev_type != HCI_BREDR)
528 set_bit(HCI_RAW, &hdev->flags);
529
1da177e4
LT		 530 if (hdev->open(hdev)) {
531 ret = -EIO;
532 goto done;
533 }
534
535 if (!test_bit(HCI_RAW, &hdev->flags)) {
536 atomic_set(&hdev->cmd_cnt, 1);
537 set_bit(HCI_INIT, &hdev->flags);
a5040efa 538 hdev->init_last_cmd = 0;
1da177e4 539
04837f64
MH		 540 ret = __hci_request(hdev, hci_init_req, 0,
541 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 542
eead27da 543 if (lmp_host_le_capable(hdev))
6ed58ec5
VT		 544 ret = __hci_request(hdev, hci_le_init_req, 0,
545 msecs_to_jiffies(HCI_INIT_TIMEOUT));
546
1da177e4
LT		 547 clear_bit(HCI_INIT, &hdev->flags);
548 }
549
550 if (!ret) {
551 hci_dev_hold(hdev);
552 set_bit(HCI_UP, &hdev->flags);
553 hci_notify(hdev, HCI_DEV_UP);
5add6af8
JH		 554 if (!test_bit(HCI_SETUP, &hdev->flags))
555 mgmt_powered(hdev->id, 1);
8e87d142 556 } else {
1da177e4
LT		 557 /* Init failed, cleanup */
558 tasklet_kill(&hdev->rx_task);
559 tasklet_kill(&hdev->tx_task);
560 tasklet_kill(&hdev->cmd_task);
561
562 skb_queue_purge(&hdev->cmd_q);
563 skb_queue_purge(&hdev->rx_q);
564
565 if (hdev->flush)
566 hdev->flush(hdev);
567
568 if (hdev->sent_cmd) {
569 kfree_skb(hdev->sent_cmd);
570 hdev->sent_cmd = NULL;
571 }
572
573 hdev->close(hdev);
574 hdev->flags = 0;
575 }
576
577done:
578 hci_req_unlock(hdev);
579 hci_dev_put(hdev);
580 return ret;
581}
582
583static int hci_dev_do_close(struct hci_dev *hdev)
584{
585 BT_DBG("%s %p", hdev->name, hdev);
586
587 hci_req_cancel(hdev, ENODEV);
588 hci_req_lock(hdev);
589
590 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 591 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 592 hci_req_unlock(hdev);
593 return 0;
594 }
595
596 /* Kill RX and TX tasks */
597 tasklet_kill(&hdev->rx_task);
598 tasklet_kill(&hdev->tx_task);
599
600 hci_dev_lock_bh(hdev);
601 inquiry_cache_flush(hdev);
602 hci_conn_hash_flush(hdev);
603 hci_dev_unlock_bh(hdev);
604
605 hci_notify(hdev, HCI_DEV_DOWN);
606
607 if (hdev->flush)
608 hdev->flush(hdev);
609
610 /* Reset device */
611 skb_queue_purge(&hdev->cmd_q);
612 atomic_set(&hdev->cmd_cnt, 1);
613 if (!test_bit(HCI_RAW, &hdev->flags)) {
614 set_bit(HCI_INIT, &hdev->flags);
04837f64 615 __hci_request(hdev, hci_reset_req, 0,
e1b6eb3c 616 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 617 clear_bit(HCI_INIT, &hdev->flags);
618 }
619
620 /* Kill cmd task */
621 tasklet_kill(&hdev->cmd_task);
622
623 /* Drop queues */
624 skb_queue_purge(&hdev->rx_q);
625 skb_queue_purge(&hdev->cmd_q);
626 skb_queue_purge(&hdev->raw_q);
627
628 /* Drop last sent command */
629 if (hdev->sent_cmd) {
b79f44c1 630 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 631 kfree_skb(hdev->sent_cmd);
632 hdev->sent_cmd = NULL;
633 }
634
635 /* After this point our queues are empty
636 * and no tasks are scheduled. */
637 hdev->close(hdev);
638
5add6af8
JH		 639 mgmt_powered(hdev->id, 0);
640
1da177e4
LT		 641 /* Clear flags */
642 hdev->flags = 0;
643
644 hci_req_unlock(hdev);
645
646 hci_dev_put(hdev);
647 return 0;
648}
649
650int hci_dev_close(__u16 dev)
651{
652 struct hci_dev *hdev;
653 int err;
654
70f23020
AE		 655 hdev = hci_dev_get(dev);
656 if (!hdev)
1da177e4
LT		 657 return -ENODEV;
658 err = hci_dev_do_close(hdev);
659 hci_dev_put(hdev);
660 return err;
661}
662
663int hci_dev_reset(__u16 dev)
664{
665 struct hci_dev *hdev;
666 int ret = 0;
667
70f23020
AE		 668 hdev = hci_dev_get(dev);
669 if (!hdev)
1da177e4
LT		 670 return -ENODEV;
671
672 hci_req_lock(hdev);
673 tasklet_disable(&hdev->tx_task);
674
675 if (!test_bit(HCI_UP, &hdev->flags))
676 goto done;
677
678 /* Drop queues */
679 skb_queue_purge(&hdev->rx_q);
680 skb_queue_purge(&hdev->cmd_q);
681
682 hci_dev_lock_bh(hdev);
683 inquiry_cache_flush(hdev);
684 hci_conn_hash_flush(hdev);
685 hci_dev_unlock_bh(hdev);
686
687 if (hdev->flush)
688 hdev->flush(hdev);
689
8e87d142 690 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 691 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 692
693 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 694 ret = __hci_request(hdev, hci_reset_req, 0,
695 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 696
697done:
698 tasklet_enable(&hdev->tx_task);
699 hci_req_unlock(hdev);
700 hci_dev_put(hdev);
701 return ret;
702}
703
704int hci_dev_reset_stat(__u16 dev)
705{
706 struct hci_dev *hdev;
707 int ret = 0;
708
70f23020
AE		 709 hdev = hci_dev_get(dev);
710 if (!hdev)
1da177e4
LT		 711 return -ENODEV;
712
713 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
714
715 hci_dev_put(hdev);
716
717 return ret;
718}
719
720int hci_dev_cmd(unsigned int cmd, void __user *arg)
721{
722 struct hci_dev *hdev;
723 struct hci_dev_req dr;
724 int err = 0;
725
726 if (copy_from_user(&dr, arg, sizeof(dr)))
727 return -EFAULT;
728
70f23020
AE		 729 hdev = hci_dev_get(dr.dev_id);
730 if (!hdev)
1da177e4
LT		 731 return -ENODEV;
732
733 switch (cmd) {
734 case HCISETAUTH:
04837f64
MH		 735 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
736 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 737 break;
738
739 case HCISETENCRYPT:
740 if (!lmp_encrypt_capable(hdev)) {
741 err = -EOPNOTSUPP;
742 break;
743 }
744
745 if (!test_bit(HCI_AUTH, &hdev->flags)) {
746 /* Auth must be enabled first */
04837f64
MH		 747 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
748 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 749 if (err)
750 break;
751 }
752
04837f64
MH		 753 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
754 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 755 break;
756
757 case HCISETSCAN:
04837f64
MH		 758 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
759 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 760 break;
761
1da177e4 762 case HCISETLINKPOL:
e4e8e37c
MH		 763 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
764 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 765 break;
766
767 case HCISETLINKMODE:
e4e8e37c
MH		 768 hdev->link_mode = ((__u16) dr.dev_opt) &
769 (HCI_LM_MASTER | HCI_LM_ACCEPT);
770 break;
771
772 case HCISETPTYPE:
773 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 774 break;
775
776 case HCISETACLMTU:
e4e8e37c
MH		 777 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
778 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 779 break;
780
781 case HCISETSCOMTU:
e4e8e37c
MH		 782 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
783 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 784 break;
785
786 default:
787 err = -EINVAL;
788 break;
789 }
e4e8e37c 790
1da177e4
LT		 791 hci_dev_put(hdev);
792 return err;
793}
794
795int hci_get_dev_list(void __user *arg)
796{
797 struct hci_dev_list_req *dl;
798 struct hci_dev_req *dr;
799 struct list_head *p;
800 int n = 0, size, err;
801 __u16 dev_num;
802
803 if (get_user(dev_num, (__u16 __user *) arg))
804 return -EFAULT;
805
806 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
807 return -EINVAL;
808
809 size = sizeof(*dl) + dev_num * sizeof(*dr);
810
70f23020
AE		 811 dl = kzalloc(size, GFP_KERNEL);
812 if (!dl)
1da177e4
LT		 813 return -ENOMEM;
814
815 dr = dl->dev_req;
816
817 read_lock_bh(&hci_dev_list_lock);
818 list_for_each(p, &hci_dev_list) {
819 struct hci_dev *hdev;
c542a06c 820
1da177e4 821 hdev = list_entry(p, struct hci_dev, list);
c542a06c 822
ab81cbf9 823 hci_del_off_timer(hdev);
c542a06c
JH		 824
825 if (!test_bit(HCI_MGMT, &hdev->flags))
826 set_bit(HCI_PAIRABLE, &hdev->flags);
827
1da177e4
LT		 828 (dr + n)->dev_id = hdev->id;
829 (dr + n)->dev_opt = hdev->flags;
c542a06c 830
1da177e4
LT		 831 if (++n >= dev_num)
832 break;
833 }
834 read_unlock_bh(&hci_dev_list_lock);
835
836 dl->dev_num = n;
837 size = sizeof(*dl) + n * sizeof(*dr);
838
839 err = copy_to_user(arg, dl, size);
840 kfree(dl);
841
842 return err ? -EFAULT : 0;
843}
844
845int hci_get_dev_info(void __user *arg)
846{
847 struct hci_dev *hdev;
848 struct hci_dev_info di;
849 int err = 0;
850
851 if (copy_from_user(&di, arg, sizeof(di)))
852 return -EFAULT;
853
70f23020
AE		 854 hdev = hci_dev_get(di.dev_id);
855 if (!hdev)
1da177e4
LT		 856 return -ENODEV;
857
ab81cbf9
JH		 858 hci_del_off_timer(hdev);
859
c542a06c
JH		 860 if (!test_bit(HCI_MGMT, &hdev->flags))
861 set_bit(HCI_PAIRABLE, &hdev->flags);
862
1da177e4
LT		 863 strcpy(di.name, hdev->name);
864 di.bdaddr = hdev->bdaddr;
943da25d 865 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 866 di.flags = hdev->flags;
867 di.pkt_type = hdev->pkt_type;
868 di.acl_mtu = hdev->acl_mtu;
869 di.acl_pkts = hdev->acl_pkts;
870 di.sco_mtu = hdev->sco_mtu;
871 di.sco_pkts = hdev->sco_pkts;
872 di.link_policy = hdev->link_policy;
873 di.link_mode = hdev->link_mode;
874
875 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
876 memcpy(&di.features, &hdev->features, sizeof(di.features));
877
878 if (copy_to_user(arg, &di, sizeof(di)))
879 err = -EFAULT;
880
881 hci_dev_put(hdev);
882
883 return err;
884}
885
886/* ---- Interface to HCI drivers ---- */
887
611b30f7
MH		 888static int hci_rfkill_set_block(void *data, bool blocked)
889{
890 struct hci_dev *hdev = data;
891
892 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
893
894 if (!blocked)
895 return 0;
896
897 hci_dev_do_close(hdev);
898
899 return 0;
900}
901
902static const struct rfkill_ops hci_rfkill_ops = {
903 .set_block = hci_rfkill_set_block,
904};
905
1da177e4
LT		 906/* Alloc HCI device */
907struct hci_dev *hci_alloc_dev(void)
908{
909 struct hci_dev *hdev;
910
25ea6db0 911 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 912 if (!hdev)
913 return NULL;
914
1da177e4
LT		 915 skb_queue_head_init(&hdev->driver_init);
916
917 return hdev;
918}
919EXPORT_SYMBOL(hci_alloc_dev);
920
921/* Free HCI device */
922void hci_free_dev(struct hci_dev *hdev)
923{
924 skb_queue_purge(&hdev->driver_init);
925
a91f2e39
MH		 926 /* will free via device release */
927 put_device(&hdev->dev);
1da177e4
LT		 928}
929EXPORT_SYMBOL(hci_free_dev);
930
ab81cbf9
JH		 931static void hci_power_on(struct work_struct *work)
932{
933 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
934
935 BT_DBG("%s", hdev->name);
936
937 if (hci_dev_open(hdev->id) < 0)
938 return;
939
940 if (test_bit(HCI_AUTO_OFF, &hdev->flags))
941 mod_timer(&hdev->off_timer,
942 jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT));
943
944 if (test_and_clear_bit(HCI_SETUP, &hdev->flags))
945 mgmt_index_added(hdev->id);
946}
947
948static void hci_power_off(struct work_struct *work)
949{
950 struct hci_dev *hdev = container_of(work, struct hci_dev, power_off);
951
952 BT_DBG("%s", hdev->name);
953
954 hci_dev_close(hdev->id);
955}
956
957static void hci_auto_off(unsigned long data)
958{
959 struct hci_dev *hdev = (struct hci_dev *) data;
960
961 BT_DBG("%s", hdev->name);
962
963 clear_bit(HCI_AUTO_OFF, &hdev->flags);
964
965 queue_work(hdev->workqueue, &hdev->power_off);
966}
967
968void hci_del_off_timer(struct hci_dev *hdev)
969{
970 BT_DBG("%s", hdev->name);
971
972 clear_bit(HCI_AUTO_OFF, &hdev->flags);
973 del_timer(&hdev->off_timer);
974}
975
2aeb9a1a
JH		 976int hci_uuids_clear(struct hci_dev *hdev)
977{
978 struct list_head *p, *n;
979
980 list_for_each_safe(p, n, &hdev->uuids) {
981 struct bt_uuid *uuid;
982
983 uuid = list_entry(p, struct bt_uuid, list);
984
985 list_del(p);
986 kfree(uuid);
987 }
988
989 return 0;
990}
991
55ed8ca1
JH		 992int hci_link_keys_clear(struct hci_dev *hdev)
993{
994 struct list_head *p, *n;
995
996 list_for_each_safe(p, n, &hdev->link_keys) {
997 struct link_key *key;
998
999 key = list_entry(p, struct link_key, list);
1000
1001 list_del(p);
1002 kfree(key);
1003 }
1004
1005 return 0;
1006}
1007
1008struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1009{
1010 struct list_head *p;
1011
1012 list_for_each(p, &hdev->link_keys) {
1013 struct link_key *k;
1014
1015 k = list_entry(p, struct link_key, list);
1016
1017 if (bacmp(bdaddr, &k->bdaddr) == 0)
1018 return k;
1019 }
1020
1021 return NULL;
1022}
1023
d25e28ab
JH		 1024static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1025 u8 key_type, u8 old_key_type)
1026{
1027 /* Legacy key */
1028 if (key_type < 0x03)
1029 return 1;
1030
1031 /* Debug keys are insecure so don't store them persistently */
1032 if (key_type == HCI_LK_DEBUG_COMBINATION)
1033 return 0;
1034
1035 /* Changed combination key and there's no previous one */
1036 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1037 return 0;
1038
1039 /* Security mode 3 case */
1040 if (!conn)
1041 return 1;
1042
1043 /* Neither local nor remote side had no-bonding as requirement */
1044 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1045 return 1;
1046
1047 /* Local side had dedicated bonding as requirement */
1048 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1049 return 1;
1050
1051 /* Remote side had dedicated bonding as requirement */
1052 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1053 return 1;
1054
1055 /* If none of the above criteria match, then don't store the key
1056 * persistently */
1057 return 0;
1058}
1059
75d262c2
VCG		 1060struct link_key *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1061{
1062 struct link_key *k;
1063
1064 list_for_each_entry(k, &hdev->link_keys, list) {
1065 struct key_master_id *id;
1066
1067 if (k->type != HCI_LK_SMP_LTK)
1068 continue;
1069
1070 if (k->dlen != sizeof(*id))
1071 continue;
1072
1073 id = (void *) &k->data;
1074 if (id->ediv == ediv &&
1075 (memcmp(rand, id->rand, sizeof(id->rand)) == 0))
1076 return k;
1077 }
1078
1079 return NULL;
1080}
1081EXPORT_SYMBOL(hci_find_ltk);
1082
1083struct link_key *hci_find_link_key_type(struct hci_dev *hdev,
1084 bdaddr_t *bdaddr, u8 type)
1085{
1086 struct link_key *k;
1087
1088 list_for_each_entry(k, &hdev->link_keys, list)
1089 if (k->type == type && bacmp(bdaddr, &k->bdaddr) == 0)
1090 return k;
1091
1092 return NULL;
1093}
1094EXPORT_SYMBOL(hci_find_link_key_type);
1095
d25e28ab
JH		 1096int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1097 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1098{
1099 struct link_key *key, *old_key;
4df378a1 1100 u8 old_key_type, persistent;
55ed8ca1
JH		 1101
1102 old_key = hci_find_link_key(hdev, bdaddr);
1103 if (old_key) {
1104 old_key_type = old_key->type;
1105 key = old_key;
1106 } else {
12adcf3a 1107 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1108 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1109 if (!key)
1110 return -ENOMEM;
1111 list_add(&key->list, &hdev->link_keys);
1112 }
1113
1114 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1115
d25e28ab
JH		 1116 /* Some buggy controller combinations generate a changed
1117 * combination key for legacy pairing even when there's no
1118 * previous key */
1119 if (type == HCI_LK_CHANGED_COMBINATION &&
1120 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1121 old_key_type == 0xff) {
d25e28ab 1122 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1123 if (conn)
1124 conn->key_type = type;
1125 }
d25e28ab 1126
55ed8ca1
JH		 1127 bacpy(&key->bdaddr, bdaddr);
1128 memcpy(key->val, val, 16);
55ed8ca1
JH		 1129 key->pin_len = pin_len;
1130
b6020ba0 1131 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1132 key->type = old_key_type;
4748fed2
JH		 1133 else
1134 key->type = type;
1135
4df378a1
JH		 1136 if (!new_key)
1137 return 0;
1138
1139 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1140
1141 mgmt_new_key(hdev->id, key, persistent);
1142
1143 if (!persistent) {
1144 list_del(&key->list);
1145 kfree(key);
1146 }
55ed8ca1
JH		 1147
1148 return 0;
1149}
1150
75d262c2 1151int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
726b4ffc 1152 u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16])
75d262c2
VCG		 1153{
1154 struct link_key *key, *old_key;
1155 struct key_master_id *id;
1156 u8 old_key_type;
1157
1158 BT_DBG("%s addr %s", hdev->name, batostr(bdaddr));
1159
1160 old_key = hci_find_link_key_type(hdev, bdaddr, HCI_LK_SMP_LTK);
1161 if (old_key) {
1162 key = old_key;
1163 old_key_type = old_key->type;
1164 } else {
1165 key = kzalloc(sizeof(*key) + sizeof(*id), GFP_ATOMIC);
1166 if (!key)
1167 return -ENOMEM;
1168 list_add(&key->list, &hdev->link_keys);
1169 old_key_type = 0xff;
1170 }
1171
1172 key->dlen = sizeof(*id);
1173
1174 bacpy(&key->bdaddr, bdaddr);
1175 memcpy(key->val, ltk, sizeof(key->val));
1176 key->type = HCI_LK_SMP_LTK;
726b4ffc 1177 key->pin_len = key_size;
75d262c2
VCG		 1178
1179 id = (void *) &key->data;
1180 id->ediv = ediv;
1181 memcpy(id->rand, rand, sizeof(id->rand));
1182
1183 if (new_key)
1184 mgmt_new_key(hdev->id, key, old_key_type);
1185
1186 return 0;
1187}
1188
55ed8ca1
JH		 1189int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1190{
1191 struct link_key *key;
1192
1193 key = hci_find_link_key(hdev, bdaddr);
1194 if (!key)
1195 return -ENOENT;
1196
1197 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1198
1199 list_del(&key->list);
1200 kfree(key);
1201
1202 return 0;
1203}
1204
6bd32326
VT		 1205/* HCI command timer function */
1206static void hci_cmd_timer(unsigned long arg)
1207{
1208 struct hci_dev *hdev = (void *) arg;
1209
1210 BT_ERR("%s command tx timeout", hdev->name);
1211 atomic_set(&hdev->cmd_cnt, 1);
1212 tasklet_schedule(&hdev->cmd_task);
1213}
1214
2763eda6
SJ		 1215struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1216 bdaddr_t *bdaddr)
1217{
1218 struct oob_data *data;
1219
1220 list_for_each_entry(data, &hdev->remote_oob_data, list)
1221 if (bacmp(bdaddr, &data->bdaddr) == 0)
1222 return data;
1223
1224 return NULL;
1225}
1226
1227int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1228{
1229 struct oob_data *data;
1230
1231 data = hci_find_remote_oob_data(hdev, bdaddr);
1232 if (!data)
1233 return -ENOENT;
1234
1235 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1236
1237 list_del(&data->list);
1238 kfree(data);
1239
1240 return 0;
1241}
1242
1243int hci_remote_oob_data_clear(struct hci_dev *hdev)
1244{
1245 struct oob_data *data, *n;
1246
1247 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1248 list_del(&data->list);
1249 kfree(data);
1250 }
1251
1252 return 0;
1253}
1254
1255int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1256 u8 *randomizer)
1257{
1258 struct oob_data *data;
1259
1260 data = hci_find_remote_oob_data(hdev, bdaddr);
1261
1262 if (!data) {
1263 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1264 if (!data)
1265 return -ENOMEM;
1266
1267 bacpy(&data->bdaddr, bdaddr);
1268 list_add(&data->list, &hdev->remote_oob_data);
1269 }
1270
1271 memcpy(data->hash, hash, sizeof(data->hash));
1272 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1273
1274 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1275
1276 return 0;
1277}
1278
b2a66aad
AJ		 1279struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
1280 bdaddr_t *bdaddr)
1281{
1282 struct list_head *p;
1283
1284 list_for_each(p, &hdev->blacklist) {
1285 struct bdaddr_list *b;
1286
1287 b = list_entry(p, struct bdaddr_list, list);
1288
1289 if (bacmp(bdaddr, &b->bdaddr) == 0)
1290 return b;
1291 }
1292
1293 return NULL;
1294}
1295
1296int hci_blacklist_clear(struct hci_dev *hdev)
1297{
1298 struct list_head *p, *n;
1299
1300 list_for_each_safe(p, n, &hdev->blacklist) {
1301 struct bdaddr_list *b;
1302
1303 b = list_entry(p, struct bdaddr_list, list);
1304
1305 list_del(p);
1306 kfree(b);
1307 }
1308
1309 return 0;
1310}
1311
1312int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr)
1313{
1314 struct bdaddr_list *entry;
b2a66aad
AJ		 1315
1316 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1317 return -EBADF;
1318
5e762444
AJ		 1319 if (hci_blacklist_lookup(hdev, bdaddr))
1320 return -EEXIST;
b2a66aad
AJ		 1321
1322 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1323 if (!entry)
1324 return -ENOMEM;
b2a66aad
AJ		 1325
1326 bacpy(&entry->bdaddr, bdaddr);
1327
1328 list_add(&entry->list, &hdev->blacklist);
1329
5e762444 1330 return mgmt_device_blocked(hdev->id, bdaddr);
b2a66aad
AJ		 1331}
1332
1333int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr)
1334{
1335 struct bdaddr_list *entry;
b2a66aad 1336
a7925bd2 1337 if (bacmp(bdaddr, BDADDR_ANY) == 0) {
5e762444 1338 return hci_blacklist_clear(hdev);
a7925bd2 1339 }
b2a66aad
AJ		 1340
1341 entry = hci_blacklist_lookup(hdev, bdaddr);
a7925bd2 1342 if (!entry) {
5e762444 1343 return -ENOENT;
a7925bd2 1344 }
b2a66aad
AJ		 1345
1346 list_del(&entry->list);
1347 kfree(entry);
1348
5e762444 1349 return mgmt_device_unblocked(hdev->id, bdaddr);
b2a66aad
AJ		 1350}
1351
35815085
AG		 1352static void hci_clear_adv_cache(unsigned long arg)
1353{
1354 struct hci_dev *hdev = (void *) arg;
1355
1356 hci_dev_lock(hdev);
1357
1358 hci_adv_entries_clear(hdev);
1359
1360 hci_dev_unlock(hdev);
1361}
1362
76c8686f
AG		 1363int hci_adv_entries_clear(struct hci_dev *hdev)
1364{
1365 struct adv_entry *entry, *tmp;
1366
1367 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1368 list_del(&entry->list);
1369 kfree(entry);
1370 }
1371
1372 BT_DBG("%s adv cache cleared", hdev->name);
1373
1374 return 0;
1375}
1376
1377struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1378{
1379 struct adv_entry *entry;
1380
1381 list_for_each_entry(entry, &hdev->adv_entries, list)
1382 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1383 return entry;
1384
1385 return NULL;
1386}
1387
1388static inline int is_connectable_adv(u8 evt_type)
1389{
1390 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1391 return 1;
1392
1393 return 0;
1394}
1395
1396int hci_add_adv_entry(struct hci_dev *hdev,
1397 struct hci_ev_le_advertising_info *ev)
1398{
1399 struct adv_entry *entry;
1400
1401 if (!is_connectable_adv(ev->evt_type))
1402 return -EINVAL;
1403
1404 /* Only new entries should be added to adv_entries. So, if
1405 * bdaddr was found, don't add it. */
1406 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1407 return 0;
1408
1409 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
1410 if (!entry)
1411 return -ENOMEM;
1412
1413 bacpy(&entry->bdaddr, &ev->bdaddr);
1414 entry->bdaddr_type = ev->bdaddr_type;
1415
1416 list_add(&entry->list, &hdev->adv_entries);
1417
1418 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1419 batostr(&entry->bdaddr), entry->bdaddr_type);
1420
1421 return 0;
1422}
1423
1da177e4
LT		 1424/* Register HCI device */
1425int hci_register_dev(struct hci_dev *hdev)
1426{
1427 struct list_head *head = &hci_dev_list, *p;
ef222013 1428 int i, id = 0;
1da177e4 1429
c13854ce
MH		 1430 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
1431 hdev->bus, hdev->owner);
1da177e4
LT		 1432
1433 if (!hdev->open || !hdev->close || !hdev->destruct)
1434 return -EINVAL;
1435
1436 write_lock_bh(&hci_dev_list_lock);
1437
1438 /* Find first available device id */
1439 list_for_each(p, &hci_dev_list) {
1440 if (list_entry(p, struct hci_dev, list)->id != id)
1441 break;
1442 head = p; id++;
1443 }
8e87d142 1444
1da177e4
LT		 1445 sprintf(hdev->name, "hci%d", id);
1446 hdev->id = id;
1447 list_add(&hdev->list, head);
1448
1449 atomic_set(&hdev->refcnt, 1);
1450 spin_lock_init(&hdev->lock);
1451
1452 hdev->flags = 0;
1453 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1454 hdev->esco_type = (ESCO_HV1);
1da177e4 1455 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1456 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1457
04837f64
MH		 1458 hdev->idle_timeout = 0;
1459 hdev->sniff_max_interval = 800;
1460 hdev->sniff_min_interval = 80;
1461
70f23020 1462 tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev);
1da177e4
LT		 1463 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
1464 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
1465
1466 skb_queue_head_init(&hdev->rx_q);
1467 skb_queue_head_init(&hdev->cmd_q);
1468 skb_queue_head_init(&hdev->raw_q);
1469
6bd32326
VT		 1470 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1471
cd4c5391 1472 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1473 hdev->reassembly[i] = NULL;
1474
1da177e4 1475 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1476 mutex_init(&hdev->req_lock);
1da177e4
LT		 1477
1478 inquiry_cache_init(hdev);
1479
1480 hci_conn_hash_init(hdev);
1481
ea4bd8ba 1482 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1483
2aeb9a1a
JH		 1484 INIT_LIST_HEAD(&hdev->uuids);
1485
55ed8ca1
JH		 1486 INIT_LIST_HEAD(&hdev->link_keys);
1487
2763eda6
SJ		 1488 INIT_LIST_HEAD(&hdev->remote_oob_data);
1489
76c8686f 1490 INIT_LIST_HEAD(&hdev->adv_entries);
35815085
AG		 1491 setup_timer(&hdev->adv_timer, hci_clear_adv_cache,
1492 (unsigned long) hdev);
76c8686f 1493
ab81cbf9
JH		 1494 INIT_WORK(&hdev->power_on, hci_power_on);
1495 INIT_WORK(&hdev->power_off, hci_power_off);
1496 setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev);
1497
1da177e4
LT		 1498 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1499
1500 atomic_set(&hdev->promisc, 0);
1501
1502 write_unlock_bh(&hci_dev_list_lock);
1503
f48fd9c8
MH		 1504 hdev->workqueue = create_singlethread_workqueue(hdev->name);
1505 if (!hdev->workqueue)
1506 goto nomem;
1507
1da177e4
LT		 1508 hci_register_sysfs(hdev);
1509
611b30f7
MH		 1510 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1511 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1512 if (hdev->rfkill) {
1513 if (rfkill_register(hdev->rfkill) < 0) {
1514 rfkill_destroy(hdev->rfkill);
1515 hdev->rfkill = NULL;
1516 }
1517 }
1518
ab81cbf9
JH		 1519 set_bit(HCI_AUTO_OFF, &hdev->flags);
1520 set_bit(HCI_SETUP, &hdev->flags);
1521 queue_work(hdev->workqueue, &hdev->power_on);
1522
1da177e4
LT		 1523 hci_notify(hdev, HCI_DEV_REG);
1524
1525 return id;
f48fd9c8
MH		 1526
1527nomem:
1528 write_lock_bh(&hci_dev_list_lock);
1529 list_del(&hdev->list);
1530 write_unlock_bh(&hci_dev_list_lock);
1531
1532 return -ENOMEM;
1da177e4
LT		 1533}
1534EXPORT_SYMBOL(hci_register_dev);
1535
1536/* Unregister HCI device */
1537int hci_unregister_dev(struct hci_dev *hdev)
1538{
ef222013
MH		 1539 int i;
1540
c13854ce 1541 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1542
1da177e4
LT		 1543 write_lock_bh(&hci_dev_list_lock);
1544 list_del(&hdev->list);
1545 write_unlock_bh(&hci_dev_list_lock);
1546
1547 hci_dev_do_close(hdev);
1548
cd4c5391 1549 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1550 kfree_skb(hdev->reassembly[i]);
1551
ab81cbf9
JH		 1552 if (!test_bit(HCI_INIT, &hdev->flags) &&
1553 !test_bit(HCI_SETUP, &hdev->flags))
1554 mgmt_index_removed(hdev->id);
1555
1da177e4
LT		 1556 hci_notify(hdev, HCI_DEV_UNREG);
1557
611b30f7
MH		 1558 if (hdev->rfkill) {
1559 rfkill_unregister(hdev->rfkill);
1560 rfkill_destroy(hdev->rfkill);
1561 }
1562
147e2d59
DY		 1563 hci_unregister_sysfs(hdev);
1564
c6f3c5f7 1565 hci_del_off_timer(hdev);
35815085 1566 del_timer(&hdev->adv_timer);
c6f3c5f7 1567
f48fd9c8
MH		 1568 destroy_workqueue(hdev->workqueue);
1569
e2e0cacb
JH		 1570 hci_dev_lock_bh(hdev);
1571 hci_blacklist_clear(hdev);
2aeb9a1a 1572 hci_uuids_clear(hdev);
55ed8ca1 1573 hci_link_keys_clear(hdev);
2763eda6 1574 hci_remote_oob_data_clear(hdev);
76c8686f 1575 hci_adv_entries_clear(hdev);
e2e0cacb
JH		 1576 hci_dev_unlock_bh(hdev);
1577
1da177e4 1578 __hci_dev_put(hdev);
ef222013 1579
1da177e4
LT		 1580 return 0;
1581}
1582EXPORT_SYMBOL(hci_unregister_dev);
1583
1584/* Suspend HCI device */
1585int hci_suspend_dev(struct hci_dev *hdev)
1586{
1587 hci_notify(hdev, HCI_DEV_SUSPEND);
1588 return 0;
1589}
1590EXPORT_SYMBOL(hci_suspend_dev);
1591
1592/* Resume HCI device */
1593int hci_resume_dev(struct hci_dev *hdev)
1594{
1595 hci_notify(hdev, HCI_DEV_RESUME);
1596 return 0;
1597}
1598EXPORT_SYMBOL(hci_resume_dev);
1599
76bca880
MH		 1600/* Receive frame from HCI drivers */
1601int hci_recv_frame(struct sk_buff *skb)
1602{
1603 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1604 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1605 && !test_bit(HCI_INIT, &hdev->flags))) {
1606 kfree_skb(skb);
1607 return -ENXIO;
1608 }
1609
1610 /* Incomming skb */
1611 bt_cb(skb)->incoming = 1;
1612
1613 /* Time stamp */
1614 __net_timestamp(skb);
1615
1616 /* Queue frame for rx task */
1617 skb_queue_tail(&hdev->rx_q, skb);
c78ae283
MH		 1618 tasklet_schedule(&hdev->rx_task);
1619
76bca880
MH		 1620 return 0;
1621}
1622EXPORT_SYMBOL(hci_recv_frame);
1623
33e882a5 1624static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1625 int count, __u8 index)
33e882a5
SS		 1626{
1627 int len = 0;
1628 int hlen = 0;
1629 int remain = count;
1630 struct sk_buff *skb;
1631 struct bt_skb_cb *scb;
1632
1633 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1634 index >= NUM_REASSEMBLY)
1635 return -EILSEQ;
1636
1637 skb = hdev->reassembly[index];
1638
1639 if (!skb) {
1640 switch (type) {
1641 case HCI_ACLDATA_PKT:
1642 len = HCI_MAX_FRAME_SIZE;
1643 hlen = HCI_ACL_HDR_SIZE;
1644 break;
1645 case HCI_EVENT_PKT:
1646 len = HCI_MAX_EVENT_SIZE;
1647 hlen = HCI_EVENT_HDR_SIZE;
1648 break;
1649 case HCI_SCODATA_PKT:
1650 len = HCI_MAX_SCO_SIZE;
1651 hlen = HCI_SCO_HDR_SIZE;
1652 break;
1653 }
1654
1e429f38 1655 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1656 if (!skb)
1657 return -ENOMEM;
1658
1659 scb = (void *) skb->cb;
1660 scb->expect = hlen;
1661 scb->pkt_type = type;
1662
1663 skb->dev = (void *) hdev;
1664 hdev->reassembly[index] = skb;
1665 }
1666
1667 while (count) {
1668 scb = (void *) skb->cb;
1669 len = min(scb->expect, (__u16)count);
1670
1671 memcpy(skb_put(skb, len), data, len);
1672
1673 count -= len;
1674 data += len;
1675 scb->expect -= len;
1676 remain = count;
1677
1678 switch (type) {
1679 case HCI_EVENT_PKT:
1680 if (skb->len == HCI_EVENT_HDR_SIZE) {
1681 struct hci_event_hdr *h = hci_event_hdr(skb);
1682 scb->expect = h->plen;
1683
1684 if (skb_tailroom(skb) < scb->expect) {
1685 kfree_skb(skb);
1686 hdev->reassembly[index] = NULL;
1687 return -ENOMEM;
1688 }
1689 }
1690 break;
1691
1692 case HCI_ACLDATA_PKT:
1693 if (skb->len == HCI_ACL_HDR_SIZE) {
1694 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1695 scb->expect = __le16_to_cpu(h->dlen);
1696
1697 if (skb_tailroom(skb) < scb->expect) {
1698 kfree_skb(skb);
1699 hdev->reassembly[index] = NULL;
1700 return -ENOMEM;
1701 }
1702 }
1703 break;
1704
1705 case HCI_SCODATA_PKT:
1706 if (skb->len == HCI_SCO_HDR_SIZE) {
1707 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1708 scb->expect = h->dlen;
1709
1710 if (skb_tailroom(skb) < scb->expect) {
1711 kfree_skb(skb);
1712 hdev->reassembly[index] = NULL;
1713 return -ENOMEM;
1714 }
1715 }
1716 break;
1717 }
1718
1719 if (scb->expect == 0) {
1720 /* Complete frame */
1721
1722 bt_cb(skb)->pkt_type = type;
1723 hci_recv_frame(skb);
1724
1725 hdev->reassembly[index] = NULL;
1726 return remain;
1727 }
1728 }
1729
1730 return remain;
1731}
1732
ef222013
MH		 1733int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1734{
f39a3c06
SS		 1735 int rem = 0;
1736
ef222013
MH		 1737 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1738 return -EILSEQ;
1739
da5f6c37 1740 while (count) {
1e429f38 1741 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1742 if (rem < 0)
1743 return rem;
ef222013 1744
f39a3c06
SS		 1745 data += (count - rem);
1746 count = rem;
f81c6224 1747 }
ef222013 1748
f39a3c06 1749 return rem;
ef222013
MH		 1750}
1751EXPORT_SYMBOL(hci_recv_fragment);
1752
99811510
SS		 1753#define STREAM_REASSEMBLY 0
1754
1755int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1756{
1757 int type;
1758 int rem = 0;
1759
da5f6c37 1760 while (count) {
99811510
SS		 1761 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1762
1763 if (!skb) {
1764 struct { char type; } *pkt;
1765
1766 /* Start of the frame */
1767 pkt = data;
1768 type = pkt->type;
1769
1770 data++;
1771 count--;
1772 } else
1773 type = bt_cb(skb)->pkt_type;
1774
1e429f38
GP		 1775 rem = hci_reassembly(hdev, type, data, count,
1776 STREAM_REASSEMBLY);
99811510
SS		 1777 if (rem < 0)
1778 return rem;
1779
1780 data += (count - rem);
1781 count = rem;
f81c6224 1782 }
99811510
SS		 1783
1784 return rem;
1785}
1786EXPORT_SYMBOL(hci_recv_stream_fragment);
1787
1da177e4
LT		 1788/* ---- Interface to upper protocols ---- */
1789
1790/* Register/Unregister protocols.
1791 * hci_task_lock is used to ensure that no tasks are running. */
1792int hci_register_proto(struct hci_proto *hp)
1793{
1794 int err = 0;
1795
1796 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1797
1798 if (hp->id >= HCI_MAX_PROTO)
1799 return -EINVAL;
1800
1801 write_lock_bh(&hci_task_lock);
1802
1803 if (!hci_proto[hp->id])
1804 hci_proto[hp->id] = hp;
1805 else
1806 err = -EEXIST;
1807
1808 write_unlock_bh(&hci_task_lock);
1809
1810 return err;
1811}
1812EXPORT_SYMBOL(hci_register_proto);
1813
1814int hci_unregister_proto(struct hci_proto *hp)
1815{
1816 int err = 0;
1817
1818 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1819
1820 if (hp->id >= HCI_MAX_PROTO)
1821 return -EINVAL;
1822
1823 write_lock_bh(&hci_task_lock);
1824
1825 if (hci_proto[hp->id])
1826 hci_proto[hp->id] = NULL;
1827 else
1828 err = -ENOENT;
1829
1830 write_unlock_bh(&hci_task_lock);
1831
1832 return err;
1833}
1834EXPORT_SYMBOL(hci_unregister_proto);
1835
1836int hci_register_cb(struct hci_cb *cb)
1837{
1838 BT_DBG("%p name %s", cb, cb->name);
1839
1840 write_lock_bh(&hci_cb_list_lock);
1841 list_add(&cb->list, &hci_cb_list);
1842 write_unlock_bh(&hci_cb_list_lock);
1843
1844 return 0;
1845}
1846EXPORT_SYMBOL(hci_register_cb);
1847
1848int hci_unregister_cb(struct hci_cb *cb)
1849{
1850 BT_DBG("%p name %s", cb, cb->name);
1851
1852 write_lock_bh(&hci_cb_list_lock);
1853 list_del(&cb->list);
1854 write_unlock_bh(&hci_cb_list_lock);
1855
1856 return 0;
1857}
1858EXPORT_SYMBOL(hci_unregister_cb);
1859
1860static int hci_send_frame(struct sk_buff *skb)
1861{
1862 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1863
1864 if (!hdev) {
1865 kfree_skb(skb);
1866 return -ENODEV;
1867 }
1868
0d48d939 1869 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4
LT		 1870
1871 if (atomic_read(&hdev->promisc)) {
1872 /* Time stamp */
a61bbcf2 1873 __net_timestamp(skb);
1da177e4 1874
eec8d2bc 1875 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 1876 }
1877
1878 /* Get rid of skb owner, prior to sending to the driver. */
1879 skb_orphan(skb);
1880
1881 return hdev->send(skb);
1882}
1883
1884/* Send HCI command */
a9de9248 1885int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 1886{
1887 int len = HCI_COMMAND_HDR_SIZE + plen;
1888 struct hci_command_hdr *hdr;
1889 struct sk_buff *skb;
1890
a9de9248 1891 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 1892
1893 skb = bt_skb_alloc(len, GFP_ATOMIC);
1894 if (!skb) {
ef222013 1895 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 1896 return -ENOMEM;
1897 }
1898
1899 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 1900 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 1901 hdr->plen = plen;
1902
1903 if (plen)
1904 memcpy(skb_put(skb, plen), param, plen);
1905
1906 BT_DBG("skb len %d", skb->len);
1907
0d48d939 1908 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 1909 skb->dev = (void *) hdev;
c78ae283 1910
a5040efa
JH		 1911 if (test_bit(HCI_INIT, &hdev->flags))
1912 hdev->init_last_cmd = opcode;
1913
1da177e4 1914 skb_queue_tail(&hdev->cmd_q, skb);
c78ae283 1915 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 1916
1917 return 0;
1918}
1da177e4
LT		 1919
1920/* Get data from the previously sent command */
a9de9248 1921void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 1922{
1923 struct hci_command_hdr *hdr;
1924
1925 if (!hdev->sent_cmd)
1926 return NULL;
1927
1928 hdr = (void *) hdev->sent_cmd->data;
1929
a9de9248 1930 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 1931 return NULL;
1932
a9de9248 1933 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 1934
1935 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1936}
1937
1938/* Send ACL data */
1939static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1940{
1941 struct hci_acl_hdr *hdr;
1942 int len = skb->len;
1943
badff6d0
ACM		 1944 skb_push(skb, HCI_ACL_HDR_SIZE);
1945 skb_reset_transport_header(skb);
9c70220b 1946 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 1947 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1948 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 1949}
1950
9a9c6a34 1951void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1da177e4
LT		 1952{
1953 struct hci_dev *hdev = conn->hdev;
1954 struct sk_buff *list;
1955
1956 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1957
1958 skb->dev = (void *) hdev;
0d48d939 1959 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 1960 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4 1961
70f23020
AE		 1962 list = skb_shinfo(skb)->frag_list;
1963 if (!list) {
1da177e4
LT		 1964 /* Non fragmented */
1965 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1966
1967 skb_queue_tail(&conn->data_q, skb);
1968 } else {
1969 /* Fragmented */
1970 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1971
1972 skb_shinfo(skb)->frag_list = NULL;
1973
1974 /* Queue all fragments atomically */
1975 spin_lock_bh(&conn->data_q.lock);
1976
1977 __skb_queue_tail(&conn->data_q, skb);
e702112f
AE		 1978
1979 flags &= ~ACL_START;
1980 flags |= ACL_CONT;
1da177e4
LT		 1981 do {
1982 skb = list; list = list->next;
8e87d142 1983
1da177e4 1984 skb->dev = (void *) hdev;
0d48d939 1985 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 1986 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 1987
1988 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1989
1990 __skb_queue_tail(&conn->data_q, skb);
1991 } while (list);
1992
1993 spin_unlock_bh(&conn->data_q.lock);
1994 }
1995
c78ae283 1996 tasklet_schedule(&hdev->tx_task);
1da177e4
LT		 1997}
1998EXPORT_SYMBOL(hci_send_acl);
1999
2000/* Send SCO data */
0d861d8b 2001void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2002{
2003 struct hci_dev *hdev = conn->hdev;
2004 struct hci_sco_hdr hdr;
2005
2006 BT_DBG("%s len %d", hdev->name, skb->len);
2007
aca3192c 2008 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2009 hdr.dlen = skb->len;
2010
badff6d0
ACM		 2011 skb_push(skb, HCI_SCO_HDR_SIZE);
2012 skb_reset_transport_header(skb);
9c70220b 2013 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2014
2015 skb->dev = (void *) hdev;
0d48d939 2016 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2017
1da177e4 2018 skb_queue_tail(&conn->data_q, skb);
c78ae283 2019 tasklet_schedule(&hdev->tx_task);
1da177e4
LT		 2020}
2021EXPORT_SYMBOL(hci_send_sco);
2022
2023/* ---- HCI TX task (outgoing data) ---- */
2024
2025/* HCI Connection scheduler */
2026static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2027{
2028 struct hci_conn_hash *h = &hdev->conn_hash;
5b7f9909 2029 struct hci_conn *conn = NULL;
1da177e4
LT		 2030 int num = 0, min = ~0;
2031 struct list_head *p;
2032
8e87d142 2033 /* We don't have to lock device here. Connections are always
1da177e4
LT		 2034 * added and removed with TX task disabled. */
2035 list_for_each(p, &h->list) {
2036 struct hci_conn *c;
2037 c = list_entry(p, struct hci_conn, list);
2038
769be974 2039 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2040 continue;
769be974
MH		 2041
2042 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2043 continue;
2044
1da177e4
LT		 2045 num++;
2046
2047 if (c->sent < min) {
2048 min = c->sent;
2049 conn = c;
2050 }
52087a79
LAD		 2051
2052 if (hci_conn_num(hdev, type) == num)
2053 break;
1da177e4
LT		 2054 }
2055
2056 if (conn) {
6ed58ec5
VT		 2057 int cnt, q;
2058
2059 switch (conn->type) {
2060 case ACL_LINK:
2061 cnt = hdev->acl_cnt;
2062 break;
2063 case SCO_LINK:
2064 case ESCO_LINK:
2065 cnt = hdev->sco_cnt;
2066 break;
2067 case LE_LINK:
2068 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2069 break;
2070 default:
2071 cnt = 0;
2072 BT_ERR("Unknown link type");
2073 }
2074
2075 q = cnt / num;
1da177e4
LT		 2076 *quote = q ? q : 1;
2077 } else
2078 *quote = 0;
2079
2080 BT_DBG("conn %p quote %d", conn, *quote);
2081 return conn;
2082}
2083
bae1f5d9 2084static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2085{
2086 struct hci_conn_hash *h = &hdev->conn_hash;
2087 struct list_head *p;
2088 struct hci_conn *c;
2089
bae1f5d9 2090 BT_ERR("%s link tx timeout", hdev->name);
1da177e4
LT		 2091
2092 /* Kill stalled connections */
2093 list_for_each(p, &h->list) {
2094 c = list_entry(p, struct hci_conn, list);
bae1f5d9
VT		 2095 if (c->type == type && c->sent) {
2096 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2097 hdev->name, batostr(&c->dst));
2098 hci_acl_disconn(c, 0x13);
2099 }
2100 }
2101}
2102
2103static inline void hci_sched_acl(struct hci_dev *hdev)
2104{
2105 struct hci_conn *conn;
2106 struct sk_buff *skb;
2107 int quote;
2108
2109 BT_DBG("%s", hdev->name);
2110
52087a79
LAD		 2111 if (!hci_conn_num(hdev, ACL_LINK))
2112 return;
2113
1da177e4
LT		 2114 if (!test_bit(HCI_RAW, &hdev->flags)) {
2115 /* ACL tx timeout must be longer than maximum
2116 * link supervision timeout (40.9 seconds) */
82453021 2117 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
bae1f5d9 2118 hci_link_tx_to(hdev, ACL_LINK);
1da177e4
LT		 2119 }
2120
2121 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
2122 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2123 BT_DBG("skb %p len %d", skb, skb->len);
04837f64 2124
14b12d0b 2125 hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active);
04837f64 2126
1da177e4
LT		 2127 hci_send_frame(skb);
2128 hdev->acl_last_tx = jiffies;
2129
2130 hdev->acl_cnt--;
2131 conn->sent++;
2132 }
2133 }
2134}
2135
2136/* Schedule SCO */
2137static inline void hci_sched_sco(struct hci_dev *hdev)
2138{
2139 struct hci_conn *conn;
2140 struct sk_buff *skb;
2141 int quote;
2142
2143 BT_DBG("%s", hdev->name);
2144
52087a79
LAD		 2145 if (!hci_conn_num(hdev, SCO_LINK))
2146 return;
2147
1da177e4
LT		 2148 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2149 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2150 BT_DBG("skb %p len %d", skb, skb->len);
2151 hci_send_frame(skb);
2152
2153 conn->sent++;
2154 if (conn->sent == ~0)
2155 conn->sent = 0;
2156 }
2157 }
2158}
2159
b6a0dc82
MH		 2160static inline void hci_sched_esco(struct hci_dev *hdev)
2161{
2162 struct hci_conn *conn;
2163 struct sk_buff *skb;
2164 int quote;
2165
2166 BT_DBG("%s", hdev->name);
2167
52087a79
LAD		 2168 if (!hci_conn_num(hdev, ESCO_LINK))
2169 return;
2170
b6a0dc82
MH		 2171 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2172 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2173 BT_DBG("skb %p len %d", skb, skb->len);
2174 hci_send_frame(skb);
2175
2176 conn->sent++;
2177 if (conn->sent == ~0)
2178 conn->sent = 0;
2179 }
2180 }
2181}
2182
6ed58ec5
VT		 2183static inline void hci_sched_le(struct hci_dev *hdev)
2184{
2185 struct hci_conn *conn;
2186 struct sk_buff *skb;
2187 int quote, cnt;
2188
2189 BT_DBG("%s", hdev->name);
2190
52087a79
LAD		 2191 if (!hci_conn_num(hdev, LE_LINK))
2192 return;
2193
6ed58ec5
VT		 2194 if (!test_bit(HCI_RAW, &hdev->flags)) {
2195 /* LE tx timeout must be longer than maximum
2196 * link supervision timeout (40.9 seconds) */
bae1f5d9 2197 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2198 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2199 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2200 }
2201
2202 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2203 while (cnt && (conn = hci_low_sent(hdev, LE_LINK, &quote))) {
2204 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2205 BT_DBG("skb %p len %d", skb, skb->len);
2206
2207 hci_send_frame(skb);
2208 hdev->le_last_tx = jiffies;
2209
2210 cnt--;
2211 conn->sent++;
2212 }
2213 }
2214 if (hdev->le_pkts)
2215 hdev->le_cnt = cnt;
2216 else
2217 hdev->acl_cnt = cnt;
2218}
2219
1da177e4
LT		 2220static void hci_tx_task(unsigned long arg)
2221{
2222 struct hci_dev *hdev = (struct hci_dev *) arg;
2223 struct sk_buff *skb;
2224
2225 read_lock(&hci_task_lock);
2226
6ed58ec5
VT		 2227 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2228 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2229
2230 /* Schedule queues and send stuff to HCI driver */
2231
2232 hci_sched_acl(hdev);
2233
2234 hci_sched_sco(hdev);
2235
b6a0dc82
MH		 2236 hci_sched_esco(hdev);
2237
6ed58ec5
VT		 2238 hci_sched_le(hdev);
2239
1da177e4
LT		 2240 /* Send next queued raw (unknown type) packet */
2241 while ((skb = skb_dequeue(&hdev->raw_q)))
2242 hci_send_frame(skb);
2243
2244 read_unlock(&hci_task_lock);
2245}
2246
25985edc 2247/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2248
2249/* ACL data packet */
2250static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2251{
2252 struct hci_acl_hdr *hdr = (void *) skb->data;
2253 struct hci_conn *conn;
2254 __u16 handle, flags;
2255
2256 skb_pull(skb, HCI_ACL_HDR_SIZE);
2257
2258 handle = __le16_to_cpu(hdr->handle);
2259 flags = hci_flags(handle);
2260 handle = hci_handle(handle);
2261
2262 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2263
2264 hdev->stat.acl_rx++;
2265
2266 hci_dev_lock(hdev);
2267 conn = hci_conn_hash_lookup_handle(hdev, handle);
2268 hci_dev_unlock(hdev);
8e87d142 2269
1da177e4
LT		 2270 if (conn) {
2271 register struct hci_proto *hp;
2272
14b12d0b 2273 hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active);
04837f64 2274
1da177e4 2275 /* Send to upper protocol */
70f23020
AE		 2276 hp = hci_proto[HCI_PROTO_L2CAP];
2277 if (hp && hp->recv_acldata) {
1da177e4
LT		 2278 hp->recv_acldata(conn, skb, flags);
2279 return;
2280 }
2281 } else {
8e87d142 2282 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2283 hdev->name, handle);
2284 }
2285
2286 kfree_skb(skb);
2287}
2288
2289/* SCO data packet */
2290static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2291{
2292 struct hci_sco_hdr *hdr = (void *) skb->data;
2293 struct hci_conn *conn;
2294 __u16 handle;
2295
2296 skb_pull(skb, HCI_SCO_HDR_SIZE);
2297
2298 handle = __le16_to_cpu(hdr->handle);
2299
2300 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2301
2302 hdev->stat.sco_rx++;
2303
2304 hci_dev_lock(hdev);
2305 conn = hci_conn_hash_lookup_handle(hdev, handle);
2306 hci_dev_unlock(hdev);
2307
2308 if (conn) {
2309 register struct hci_proto *hp;
2310
2311 /* Send to upper protocol */
70f23020
AE		 2312 hp = hci_proto[HCI_PROTO_SCO];
2313 if (hp && hp->recv_scodata) {
1da177e4
LT		 2314 hp->recv_scodata(conn, skb);
2315 return;
2316 }
2317 } else {
8e87d142 2318 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2319 hdev->name, handle);
2320 }
2321
2322 kfree_skb(skb);
2323}
2324
6516455d 2325static void hci_rx_task(unsigned long arg)
1da177e4
LT		 2326{
2327 struct hci_dev *hdev = (struct hci_dev *) arg;
2328 struct sk_buff *skb;
2329
2330 BT_DBG("%s", hdev->name);
2331
2332 read_lock(&hci_task_lock);
2333
2334 while ((skb = skb_dequeue(&hdev->rx_q))) {
2335 if (atomic_read(&hdev->promisc)) {
2336 /* Send copy to the sockets */
eec8d2bc 2337 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 2338 }
2339
2340 if (test_bit(HCI_RAW, &hdev->flags)) {
2341 kfree_skb(skb);
2342 continue;
2343 }
2344
2345 if (test_bit(HCI_INIT, &hdev->flags)) {
2346 /* Don't process data packets in this states. */
0d48d939 2347 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2348 case HCI_ACLDATA_PKT:
2349 case HCI_SCODATA_PKT:
2350 kfree_skb(skb);
2351 continue;
3ff50b79 2352 }
1da177e4
LT		 2353 }
2354
2355 /* Process frame */
0d48d939 2356 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2357 case HCI_EVENT_PKT:
2358 hci_event_packet(hdev, skb);
2359 break;
2360
2361 case HCI_ACLDATA_PKT:
2362 BT_DBG("%s ACL data packet", hdev->name);
2363 hci_acldata_packet(hdev, skb);
2364 break;
2365
2366 case HCI_SCODATA_PKT:
2367 BT_DBG("%s SCO data packet", hdev->name);
2368 hci_scodata_packet(hdev, skb);
2369 break;
2370
2371 default:
2372 kfree_skb(skb);
2373 break;
2374 }
2375 }
2376
2377 read_unlock(&hci_task_lock);
2378}
2379
2380static void hci_cmd_task(unsigned long arg)
2381{
2382 struct hci_dev *hdev = (struct hci_dev *) arg;
2383 struct sk_buff *skb;
2384
2385 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2386
1da177e4 2387 /* Send queued commands */
5a08ecce
AE		 2388 if (atomic_read(&hdev->cmd_cnt)) {
2389 skb = skb_dequeue(&hdev->cmd_q);
2390 if (!skb)
2391 return;
2392
7585b97a 2393 kfree_skb(hdev->sent_cmd);
1da177e4 2394
70f23020
AE		 2395 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2396 if (hdev->sent_cmd) {
1da177e4
LT		 2397 atomic_dec(&hdev->cmd_cnt);
2398 hci_send_frame(skb);
7bdb8a5c
SJ		 2399 if (test_bit(HCI_RESET, &hdev->flags))
2400 del_timer(&hdev->cmd_timer);
2401 else
2402 mod_timer(&hdev->cmd_timer,
6bd32326 2403 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2404 } else {
2405 skb_queue_head(&hdev->cmd_q, skb);
c78ae283 2406 tasklet_schedule(&hdev->cmd_task);
1da177e4
LT		 2407 }
2408 }
2409}
Linux kernel - Deliverables
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