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8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
8c520a59 30#include <linux/rfkill.h>
baf27f6e 31#include <linux/debugfs.h>
99780a7b 32#include <linux/crypto.h>
47219839 33#include <asm/unaligned.h>
1da177e4
LT		 34
35#include <net/bluetooth/bluetooth.h>
36#include <net/bluetooth/hci_core.h>
4bc58f51 37#include <net/bluetooth/l2cap.h>
af58925c 38#include <net/bluetooth/mgmt.h>
1da177e4 39
970c4e46
JH		 40#include "smp.h"
41
b78752cc 42static void hci_rx_work(struct work_struct *work);
c347b765 43static void hci_cmd_work(struct work_struct *work);
3eff45ea 44static void hci_tx_work(struct work_struct *work);
1da177e4 45
1da177e4
LT		 46/* HCI device list */
47LIST_HEAD(hci_dev_list);
48DEFINE_RWLOCK(hci_dev_list_lock);
49
50/* HCI callback list */
51LIST_HEAD(hci_cb_list);
52DEFINE_RWLOCK(hci_cb_list_lock);
53
3df92b31
SL		 54/* HCI ID Numbering */
55static DEFINE_IDA(hci_index_ida);
56
899de765
MH		 57/* ----- HCI requests ----- */
58
59#define HCI_REQ_DONE 0
60#define HCI_REQ_PEND 1
61#define HCI_REQ_CANCELED 2
62
63#define hci_req_lock(d) mutex_lock(&d->req_lock)
64#define hci_req_unlock(d) mutex_unlock(&d->req_lock)
65
1da177e4
LT		 66/* ---- HCI notifications ---- */
67
6516455d 68static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 69{
040030ef 70 hci_sock_dev_event(hdev, event);
1da177e4
LT		 71}
72
baf27f6e
MH		 73/* ---- HCI debugfs entries ---- */
74
4b4148e9
MH		 75static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
76 size_t count, loff_t *ppos)
77{
78 struct hci_dev *hdev = file->private_data;
79 char buf[3];
80
111902f7 81 buf[0] = test_bit(HCI_DUT_MODE, &hdev->dbg_flags) ? 'Y': 'N';
4b4148e9
MH		 82 buf[1] = '\n';
83 buf[2] = '\0';
84 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
85}
86
87static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
88 size_t count, loff_t *ppos)
89{
90 struct hci_dev *hdev = file->private_data;
91 struct sk_buff *skb;
92 char buf[32];
93 size_t buf_size = min(count, (sizeof(buf)-1));
94 bool enable;
95 int err;
96
97 if (!test_bit(HCI_UP, &hdev->flags))
98 return -ENETDOWN;
99
100 if (copy_from_user(buf, user_buf, buf_size))
101 return -EFAULT;
102
103 buf[buf_size] = '\0';
104 if (strtobool(buf, &enable))
105 return -EINVAL;
106
111902f7 107 if (enable == test_bit(HCI_DUT_MODE, &hdev->dbg_flags))
4b4148e9
MH		 108 return -EALREADY;
109
110 hci_req_lock(hdev);
111 if (enable)
112 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
113 HCI_CMD_TIMEOUT);
114 else
115 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
116 HCI_CMD_TIMEOUT);
117 hci_req_unlock(hdev);
118
119 if (IS_ERR(skb))
120 return PTR_ERR(skb);
121
122 err = -bt_to_errno(skb->data[0]);
123 kfree_skb(skb);
124
125 if (err < 0)
126 return err;
127
111902f7 128 change_bit(HCI_DUT_MODE, &hdev->dbg_flags);
4b4148e9
MH		 129
130 return count;
131}
132
133static const struct file_operations dut_mode_fops = {
134 .open = simple_open,
135 .read = dut_mode_read,
136 .write = dut_mode_write,
137 .llseek = default_llseek,
138};
139
dfb826a8
MH		 140static int features_show(struct seq_file *f, void *ptr)
141{
142 struct hci_dev *hdev = f->private;
143 u8 p;
144
145 hci_dev_lock(hdev);
146 for (p = 0; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
cfbb2b5b 147 seq_printf(f, "%2u: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
dfb826a8
MH		 148 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n", p,
149 hdev->features[p][0], hdev->features[p][1],
150 hdev->features[p][2], hdev->features[p][3],
151 hdev->features[p][4], hdev->features[p][5],
152 hdev->features[p][6], hdev->features[p][7]);
153 }
cfbb2b5b
MH		 154 if (lmp_le_capable(hdev))
155 seq_printf(f, "LE: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
156 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n",
157 hdev->le_features[0], hdev->le_features[1],
158 hdev->le_features[2], hdev->le_features[3],
159 hdev->le_features[4], hdev->le_features[5],
160 hdev->le_features[6], hdev->le_features[7]);
dfb826a8
MH		 161 hci_dev_unlock(hdev);
162
163 return 0;
164}
165
166static int features_open(struct inode *inode, struct file *file)
167{
168 return single_open(file, features_show, inode->i_private);
169}
170
171static const struct file_operations features_fops = {
172 .open = features_open,
173 .read = seq_read,
174 .llseek = seq_lseek,
175 .release = single_release,
176};
177
70afe0b8
MH		 178static int blacklist_show(struct seq_file *f, void *p)
179{
180 struct hci_dev *hdev = f->private;
181 struct bdaddr_list *b;
182
183 hci_dev_lock(hdev);
184 list_for_each_entry(b, &hdev->blacklist, list)
b25f0785 185 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
70afe0b8
MH		 186 hci_dev_unlock(hdev);
187
188 return 0;
189}
190
191static int blacklist_open(struct inode *inode, struct file *file)
192{
193 return single_open(file, blacklist_show, inode->i_private);
194}
195
196static const struct file_operations blacklist_fops = {
197 .open = blacklist_open,
198 .read = seq_read,
199 .llseek = seq_lseek,
200 .release = single_release,
201};
202
6659358e
JH		 203static int whitelist_show(struct seq_file *f, void *p)
204{
205 struct hci_dev *hdev = f->private;
206 struct bdaddr_list *b;
207
208 hci_dev_lock(hdev);
209 list_for_each_entry(b, &hdev->whitelist, list)
210 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
211 hci_dev_unlock(hdev);
212
213 return 0;
214}
215
216static int whitelist_open(struct inode *inode, struct file *file)
217{
218 return single_open(file, whitelist_show, inode->i_private);
219}
220
221static const struct file_operations whitelist_fops = {
222 .open = whitelist_open,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .release = single_release,
226};
227
47219839
MH		 228static int uuids_show(struct seq_file *f, void *p)
229{
230 struct hci_dev *hdev = f->private;
231 struct bt_uuid *uuid;
232
233 hci_dev_lock(hdev);
234 list_for_each_entry(uuid, &hdev->uuids, list) {
58f01aa9
MH		 235 u8 i, val[16];
236
237 /* The Bluetooth UUID values are stored in big endian,
238 * but with reversed byte order. So convert them into
239 * the right order for the %pUb modifier.
240 */
241 for (i = 0; i < 16; i++)
242 val[i] = uuid->uuid[15 - i];
243
244 seq_printf(f, "%pUb\n", val);
47219839
MH		 245 }
246 hci_dev_unlock(hdev);
247
248 return 0;
249}
250
251static int uuids_open(struct inode *inode, struct file *file)
252{
253 return single_open(file, uuids_show, inode->i_private);
254}
255
256static const struct file_operations uuids_fops = {
257 .open = uuids_open,
258 .read = seq_read,
259 .llseek = seq_lseek,
260 .release = single_release,
261};
262
baf27f6e
MH		 263static int inquiry_cache_show(struct seq_file *f, void *p)
264{
265 struct hci_dev *hdev = f->private;
266 struct discovery_state *cache = &hdev->discovery;
267 struct inquiry_entry *e;
268
269 hci_dev_lock(hdev);
270
271 list_for_each_entry(e, &cache->all, all) {
272 struct inquiry_data *data = &e->data;
273 seq_printf(f, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
274 &data->bdaddr,
275 data->pscan_rep_mode, data->pscan_period_mode,
276 data->pscan_mode, data->dev_class[2],
277 data->dev_class[1], data->dev_class[0],
278 __le16_to_cpu(data->clock_offset),
279 data->rssi, data->ssp_mode, e->timestamp);
280 }
281
282 hci_dev_unlock(hdev);
283
284 return 0;
285}
286
287static int inquiry_cache_open(struct inode *inode, struct file *file)
288{
289 return single_open(file, inquiry_cache_show, inode->i_private);
290}
291
292static const struct file_operations inquiry_cache_fops = {
293 .open = inquiry_cache_open,
294 .read = seq_read,
295 .llseek = seq_lseek,
296 .release = single_release,
297};
298
02d08d15
MH		 299static int link_keys_show(struct seq_file *f, void *ptr)
300{
301 struct hci_dev *hdev = f->private;
302 struct list_head *p, *n;
303
304 hci_dev_lock(hdev);
305 list_for_each_safe(p, n, &hdev->link_keys) {
306 struct link_key *key = list_entry(p, struct link_key, list);
307 seq_printf(f, "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
308 HCI_LINK_KEY_SIZE, key->val, key->pin_len);
309 }
310 hci_dev_unlock(hdev);
311
312 return 0;
313}
314
315static int link_keys_open(struct inode *inode, struct file *file)
316{
317 return single_open(file, link_keys_show, inode->i_private);
318}
319
320static const struct file_operations link_keys_fops = {
321 .open = link_keys_open,
322 .read = seq_read,
323 .llseek = seq_lseek,
324 .release = single_release,
325};
326
babdbb3c
MH		 327static int dev_class_show(struct seq_file *f, void *ptr)
328{
329 struct hci_dev *hdev = f->private;
330
331 hci_dev_lock(hdev);
332 seq_printf(f, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
333 hdev->dev_class[1], hdev->dev_class[0]);
334 hci_dev_unlock(hdev);
335
336 return 0;
337}
338
339static int dev_class_open(struct inode *inode, struct file *file)
340{
341 return single_open(file, dev_class_show, inode->i_private);
342}
343
344static const struct file_operations dev_class_fops = {
345 .open = dev_class_open,
346 .read = seq_read,
347 .llseek = seq_lseek,
348 .release = single_release,
349};
350
041000b9
MH		 351static int voice_setting_get(void *data, u64 *val)
352{
353 struct hci_dev *hdev = data;
354
355 hci_dev_lock(hdev);
356 *val = hdev->voice_setting;
357 hci_dev_unlock(hdev);
358
359 return 0;
360}
361
362DEFINE_SIMPLE_ATTRIBUTE(voice_setting_fops, voice_setting_get,
363 NULL, "0x%4.4llx\n");
364
ebd1e33b
MH		 365static int auto_accept_delay_set(void *data, u64 val)
366{
367 struct hci_dev *hdev = data;
368
369 hci_dev_lock(hdev);
370 hdev->auto_accept_delay = val;
371 hci_dev_unlock(hdev);
372
373 return 0;
374}
375
376static int auto_accept_delay_get(void *data, u64 *val)
377{
378 struct hci_dev *hdev = data;
379
380 hci_dev_lock(hdev);
381 *val = hdev->auto_accept_delay;
382 hci_dev_unlock(hdev);
383
384 return 0;
385}
386
387DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
388 auto_accept_delay_set, "%llu\n");
389
5afeac14
MH		 390static ssize_t force_sc_support_read(struct file *file, char __user *user_buf,
391 size_t count, loff_t *ppos)
392{
393 struct hci_dev *hdev = file->private_data;
394 char buf[3];
395
111902f7 396 buf[0] = test_bit(HCI_FORCE_SC, &hdev->dbg_flags) ? 'Y': 'N';
5afeac14
MH		 397 buf[1] = '\n';
398 buf[2] = '\0';
399 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
400}
401
402static ssize_t force_sc_support_write(struct file *file,
403 const char __user *user_buf,
404 size_t count, loff_t *ppos)
405{
406 struct hci_dev *hdev = file->private_data;
407 char buf[32];
408 size_t buf_size = min(count, (sizeof(buf)-1));
409 bool enable;
410
411 if (test_bit(HCI_UP, &hdev->flags))
412 return -EBUSY;
413
414 if (copy_from_user(buf, user_buf, buf_size))
415 return -EFAULT;
416
417 buf[buf_size] = '\0';
418 if (strtobool(buf, &enable))
419 return -EINVAL;
420
111902f7 421 if (enable == test_bit(HCI_FORCE_SC, &hdev->dbg_flags))
5afeac14
MH		 422 return -EALREADY;
423
111902f7 424 change_bit(HCI_FORCE_SC, &hdev->dbg_flags);
5afeac14
MH		 425
426 return count;
427}
428
429static const struct file_operations force_sc_support_fops = {
430 .open = simple_open,
431 .read = force_sc_support_read,
432 .write = force_sc_support_write,
433 .llseek = default_llseek,
434};
435
134c2a89
MH		 436static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
437 size_t count, loff_t *ppos)
438{
439 struct hci_dev *hdev = file->private_data;
440 char buf[3];
441
442 buf[0] = test_bit(HCI_SC_ONLY, &hdev->dev_flags) ? 'Y': 'N';
443 buf[1] = '\n';
444 buf[2] = '\0';
445 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
446}
447
448static const struct file_operations sc_only_mode_fops = {
449 .open = simple_open,
450 .read = sc_only_mode_read,
451 .llseek = default_llseek,
452};
453
2bfa3531
MH		 454static int idle_timeout_set(void *data, u64 val)
455{
456 struct hci_dev *hdev = data;
457
458 if (val != 0 && (val < 500 || val > 3600000))
459 return -EINVAL;
460
461 hci_dev_lock(hdev);
2be48b65 462 hdev->idle_timeout = val;
2bfa3531
MH		 463 hci_dev_unlock(hdev);
464
465 return 0;
466}
467
468static int idle_timeout_get(void *data, u64 *val)
469{
470 struct hci_dev *hdev = data;
471
472 hci_dev_lock(hdev);
473 *val = hdev->idle_timeout;
474 hci_dev_unlock(hdev);
475
476 return 0;
477}
478
479DEFINE_SIMPLE_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
480 idle_timeout_set, "%llu\n");
481
c982b2ea
JH		 482static int rpa_timeout_set(void *data, u64 val)
483{
484 struct hci_dev *hdev = data;
485
486 /* Require the RPA timeout to be at least 30 seconds and at most
487 * 24 hours.
488 */
489 if (val < 30 || val > (60 * 60 * 24))
490 return -EINVAL;
491
492 hci_dev_lock(hdev);
493 hdev->rpa_timeout = val;
494 hci_dev_unlock(hdev);
495
496 return 0;
497}
498
499static int rpa_timeout_get(void *data, u64 *val)
500{
501 struct hci_dev *hdev = data;
502
503 hci_dev_lock(hdev);
504 *val = hdev->rpa_timeout;
505 hci_dev_unlock(hdev);
506
507 return 0;
508}
509
510DEFINE_SIMPLE_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
511 rpa_timeout_set, "%llu\n");
512
2bfa3531
MH		 513static int sniff_min_interval_set(void *data, u64 val)
514{
515 struct hci_dev *hdev = data;
516
517 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
518 return -EINVAL;
519
520 hci_dev_lock(hdev);
2be48b65 521 hdev->sniff_min_interval = val;
2bfa3531
MH		 522 hci_dev_unlock(hdev);
523
524 return 0;
525}
526
527static int sniff_min_interval_get(void *data, u64 *val)
528{
529 struct hci_dev *hdev = data;
530
531 hci_dev_lock(hdev);
532 *val = hdev->sniff_min_interval;
533 hci_dev_unlock(hdev);
534
535 return 0;
536}
537
538DEFINE_SIMPLE_ATTRIBUTE(sniff_min_interval_fops, sniff_min_interval_get,
539 sniff_min_interval_set, "%llu\n");
540
541static int sniff_max_interval_set(void *data, u64 val)
542{
543 struct hci_dev *hdev = data;
544
545 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
546 return -EINVAL;
547
548 hci_dev_lock(hdev);
2be48b65 549 hdev->sniff_max_interval = val;
2bfa3531
MH		 550 hci_dev_unlock(hdev);
551
552 return 0;
553}
554
555static int sniff_max_interval_get(void *data, u64 *val)
556{
557 struct hci_dev *hdev = data;
558
559 hci_dev_lock(hdev);
560 *val = hdev->sniff_max_interval;
561 hci_dev_unlock(hdev);
562
563 return 0;
564}
565
566DEFINE_SIMPLE_ATTRIBUTE(sniff_max_interval_fops, sniff_max_interval_get,
567 sniff_max_interval_set, "%llu\n");
568
31ad1691
AK		 569static int conn_info_min_age_set(void *data, u64 val)
570{
571 struct hci_dev *hdev = data;
572
573 if (val == 0 || val > hdev->conn_info_max_age)
574 return -EINVAL;
575
576 hci_dev_lock(hdev);
577 hdev->conn_info_min_age = val;
578 hci_dev_unlock(hdev);
579
580 return 0;
581}
582
583static int conn_info_min_age_get(void *data, u64 *val)
584{
585 struct hci_dev *hdev = data;
586
587 hci_dev_lock(hdev);
588 *val = hdev->conn_info_min_age;
589 hci_dev_unlock(hdev);
590
591 return 0;
592}
593
594DEFINE_SIMPLE_ATTRIBUTE(conn_info_min_age_fops, conn_info_min_age_get,
595 conn_info_min_age_set, "%llu\n");
596
597static int conn_info_max_age_set(void *data, u64 val)
598{
599 struct hci_dev *hdev = data;
600
601 if (val == 0 || val < hdev->conn_info_min_age)
602 return -EINVAL;
603
604 hci_dev_lock(hdev);
605 hdev->conn_info_max_age = val;
606 hci_dev_unlock(hdev);
607
608 return 0;
609}
610
611static int conn_info_max_age_get(void *data, u64 *val)
612{
613 struct hci_dev *hdev = data;
614
615 hci_dev_lock(hdev);
616 *val = hdev->conn_info_max_age;
617 hci_dev_unlock(hdev);
618
619 return 0;
620}
621
622DEFINE_SIMPLE_ATTRIBUTE(conn_info_max_age_fops, conn_info_max_age_get,
623 conn_info_max_age_set, "%llu\n");
624
ac345813
MH		 625static int identity_show(struct seq_file *f, void *p)
626{
627 struct hci_dev *hdev = f->private;
a1f4c318 628 bdaddr_t addr;
ac345813
MH		 629 u8 addr_type;
630
631 hci_dev_lock(hdev);
632
a1f4c318 633 hci_copy_identity_address(hdev, &addr, &addr_type);
ac345813 634
a1f4c318 635 seq_printf(f, "%pMR (type %u) %*phN %pMR\n", &addr, addr_type,
473deef2 636 16, hdev->irk, &hdev->rpa);
ac345813
MH		 637
638 hci_dev_unlock(hdev);
639
640 return 0;
641}
642
643static int identity_open(struct inode *inode, struct file *file)
644{
645 return single_open(file, identity_show, inode->i_private);
646}
647
648static const struct file_operations identity_fops = {
649 .open = identity_open,
650 .read = seq_read,
651 .llseek = seq_lseek,
652 .release = single_release,
653};
654
7a4cd51d
MH		 655static int random_address_show(struct seq_file *f, void *p)
656{
657 struct hci_dev *hdev = f->private;
658
659 hci_dev_lock(hdev);
660 seq_printf(f, "%pMR\n", &hdev->random_addr);
661 hci_dev_unlock(hdev);
662
663 return 0;
664}
665
666static int random_address_open(struct inode *inode, struct file *file)
667{
668 return single_open(file, random_address_show, inode->i_private);
669}
670
671static const struct file_operations random_address_fops = {
672 .open = random_address_open,
673 .read = seq_read,
674 .llseek = seq_lseek,
675 .release = single_release,
676};
677
e7b8fc92
MH		 678static int static_address_show(struct seq_file *f, void *p)
679{
680 struct hci_dev *hdev = f->private;
681
682 hci_dev_lock(hdev);
683 seq_printf(f, "%pMR\n", &hdev->static_addr);
684 hci_dev_unlock(hdev);
685
686 return 0;
687}
688
689static int static_address_open(struct inode *inode, struct file *file)
690{
691 return single_open(file, static_address_show, inode->i_private);
692}
693
694static const struct file_operations static_address_fops = {
695 .open = static_address_open,
696 .read = seq_read,
697 .llseek = seq_lseek,
698 .release = single_release,
699};
700
b32bba6c
MH		 701static ssize_t force_static_address_read(struct file *file,
702 char __user *user_buf,
703 size_t count, loff_t *ppos)
92202185 704{
b32bba6c
MH		 705 struct hci_dev *hdev = file->private_data;
706 char buf[3];
92202185 707
111902f7 708 buf[0] = test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags) ? 'Y': 'N';
b32bba6c
MH		 709 buf[1] = '\n';
710 buf[2] = '\0';
711 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
92202185
MH		 712}
713
b32bba6c
MH		 714static ssize_t force_static_address_write(struct file *file,
715 const char __user *user_buf,
716 size_t count, loff_t *ppos)
92202185 717{
b32bba6c
MH		 718 struct hci_dev *hdev = file->private_data;
719 char buf[32];
720 size_t buf_size = min(count, (sizeof(buf)-1));
721 bool enable;
92202185 722
b32bba6c
MH		 723 if (test_bit(HCI_UP, &hdev->flags))
724 return -EBUSY;
92202185 725
b32bba6c
MH		 726 if (copy_from_user(buf, user_buf, buf_size))
727 return -EFAULT;
728
729 buf[buf_size] = '\0';
730 if (strtobool(buf, &enable))
731 return -EINVAL;
732
111902f7 733 if (enable == test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags))
b32bba6c
MH		 734 return -EALREADY;
735
111902f7 736 change_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags);
b32bba6c
MH		 737
738 return count;
92202185
MH		 739}
740
b32bba6c
MH		 741static const struct file_operations force_static_address_fops = {
742 .open = simple_open,
743 .read = force_static_address_read,
744 .write = force_static_address_write,
745 .llseek = default_llseek,
746};
92202185 747
d2ab0ac1
MH		 748static int white_list_show(struct seq_file *f, void *ptr)
749{
750 struct hci_dev *hdev = f->private;
751 struct bdaddr_list *b;
752
753 hci_dev_lock(hdev);
754 list_for_each_entry(b, &hdev->le_white_list, list)
755 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
756 hci_dev_unlock(hdev);
757
758 return 0;
759}
760
761static int white_list_open(struct inode *inode, struct file *file)
762{
763 return single_open(file, white_list_show, inode->i_private);
764}
765
766static const struct file_operations white_list_fops = {
767 .open = white_list_open,
768 .read = seq_read,
769 .llseek = seq_lseek,
770 .release = single_release,
771};
772
3698d704
MH		 773static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
774{
775 struct hci_dev *hdev = f->private;
776 struct list_head *p, *n;
777
778 hci_dev_lock(hdev);
779 list_for_each_safe(p, n, &hdev->identity_resolving_keys) {
780 struct smp_irk *irk = list_entry(p, struct smp_irk, list);
781 seq_printf(f, "%pMR (type %u) %*phN %pMR\n",
782 &irk->bdaddr, irk->addr_type,
783 16, irk->val, &irk->rpa);
784 }
785 hci_dev_unlock(hdev);
786
787 return 0;
788}
789
790static int identity_resolving_keys_open(struct inode *inode, struct file *file)
791{
792 return single_open(file, identity_resolving_keys_show,
793 inode->i_private);
794}
795
796static const struct file_operations identity_resolving_keys_fops = {
797 .open = identity_resolving_keys_open,
798 .read = seq_read,
799 .llseek = seq_lseek,
800 .release = single_release,
801};
802
8f8625cd
MH		 803static int long_term_keys_show(struct seq_file *f, void *ptr)
804{
805 struct hci_dev *hdev = f->private;
806 struct list_head *p, *n;
807
808 hci_dev_lock(hdev);
f813f1be 809 list_for_each_safe(p, n, &hdev->long_term_keys) {
8f8625cd 810 struct smp_ltk *ltk = list_entry(p, struct smp_ltk, list);
fe39c7b2 811 seq_printf(f, "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
8f8625cd
MH		 812 &ltk->bdaddr, ltk->bdaddr_type, ltk->authenticated,
813 ltk->type, ltk->enc_size, __le16_to_cpu(ltk->ediv),
fe39c7b2 814 __le64_to_cpu(ltk->rand), 16, ltk->val);
8f8625cd
MH		 815 }
816 hci_dev_unlock(hdev);
817
818 return 0;
819}
820
821static int long_term_keys_open(struct inode *inode, struct file *file)
822{
823 return single_open(file, long_term_keys_show, inode->i_private);
824}
825
826static const struct file_operations long_term_keys_fops = {
827 .open = long_term_keys_open,
828 .read = seq_read,
829 .llseek = seq_lseek,
830 .release = single_release,
831};
832
4e70c7e7
MH		 833static int conn_min_interval_set(void *data, u64 val)
834{
835 struct hci_dev *hdev = data;
836
837 if (val < 0x0006 || val > 0x0c80 || val > hdev->le_conn_max_interval)
838 return -EINVAL;
839
840 hci_dev_lock(hdev);
2be48b65 841 hdev->le_conn_min_interval = val;
4e70c7e7
MH		 842 hci_dev_unlock(hdev);
843
844 return 0;
845}
846
847static int conn_min_interval_get(void *data, u64 *val)
848{
849 struct hci_dev *hdev = data;
850
851 hci_dev_lock(hdev);
852 *val = hdev->le_conn_min_interval;
853 hci_dev_unlock(hdev);
854
855 return 0;
856}
857
858DEFINE_SIMPLE_ATTRIBUTE(conn_min_interval_fops, conn_min_interval_get,
859 conn_min_interval_set, "%llu\n");
860
861static int conn_max_interval_set(void *data, u64 val)
862{
863 struct hci_dev *hdev = data;
864
865 if (val < 0x0006 || val > 0x0c80 || val < hdev->le_conn_min_interval)
866 return -EINVAL;
867
868 hci_dev_lock(hdev);
2be48b65 869 hdev->le_conn_max_interval = val;
4e70c7e7
MH		 870 hci_dev_unlock(hdev);
871
872 return 0;
873}
874
875static int conn_max_interval_get(void *data, u64 *val)
876{
877 struct hci_dev *hdev = data;
878
879 hci_dev_lock(hdev);
880 *val = hdev->le_conn_max_interval;
881 hci_dev_unlock(hdev);
882
883 return 0;
884}
885
886DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
887 conn_max_interval_set, "%llu\n");
888
816a93d1 889static int conn_latency_set(void *data, u64 val)
3f959d46
MH		 890{
891 struct hci_dev *hdev = data;
892
816a93d1 893 if (val > 0x01f3)
3f959d46
MH		 894 return -EINVAL;
895
896 hci_dev_lock(hdev);
816a93d1 897 hdev->le_conn_latency = val;
3f959d46
MH		 898 hci_dev_unlock(hdev);
899
900 return 0;
901}
902
816a93d1 903static int conn_latency_get(void *data, u64 *val)
3f959d46
MH		 904{
905 struct hci_dev *hdev = data;
906
907 hci_dev_lock(hdev);
816a93d1 908 *val = hdev->le_conn_latency;
3f959d46
MH		 909 hci_dev_unlock(hdev);
910
911 return 0;
912}
913
816a93d1
MH		 914DEFINE_SIMPLE_ATTRIBUTE(conn_latency_fops, conn_latency_get,
915 conn_latency_set, "%llu\n");
3f959d46 916
f1649577 917static int supervision_timeout_set(void *data, u64 val)
89863109 918{
f1649577 919 struct hci_dev *hdev = data;
89863109 920
f1649577
MH		 921 if (val < 0x000a || val > 0x0c80)
922 return -EINVAL;
923
924 hci_dev_lock(hdev);
925 hdev->le_supv_timeout = val;
926 hci_dev_unlock(hdev);
927
928 return 0;
89863109
JR		 929}
930
f1649577 931static int supervision_timeout_get(void *data, u64 *val)
89863109 932{
f1649577 933 struct hci_dev *hdev = data;
89863109 934
f1649577
MH		 935 hci_dev_lock(hdev);
936 *val = hdev->le_supv_timeout;
937 hci_dev_unlock(hdev);
89863109 938
f1649577
MH		 939 return 0;
940}
89863109 941
f1649577
MH		 942DEFINE_SIMPLE_ATTRIBUTE(supervision_timeout_fops, supervision_timeout_get,
943 supervision_timeout_set, "%llu\n");
89863109 944
3f959d46
MH		 945static int adv_channel_map_set(void *data, u64 val)
946{
947 struct hci_dev *hdev = data;
89863109 948
3f959d46
MH		 949 if (val < 0x01 || val > 0x07)
950 return -EINVAL;
89863109 951
3f959d46
MH		 952 hci_dev_lock(hdev);
953 hdev->le_adv_channel_map = val;
954 hci_dev_unlock(hdev);
89863109 955
3f959d46
MH		 956 return 0;
957}
89863109 958
3f959d46 959static int adv_channel_map_get(void *data, u64 *val)
7d474e06 960{
3f959d46 961 struct hci_dev *hdev = data;
7d474e06
AG		 962
963 hci_dev_lock(hdev);
3f959d46
MH		 964 *val = hdev->le_adv_channel_map;
965 hci_dev_unlock(hdev);
7d474e06 966
3f959d46
MH		 967 return 0;
968}
969
970DEFINE_SIMPLE_ATTRIBUTE(adv_channel_map_fops, adv_channel_map_get,
971 adv_channel_map_set, "%llu\n");
7d474e06 972
729a1051
GL		 973static int adv_min_interval_set(void *data, u64 val)
974{
975 struct hci_dev *hdev = data;
976
977 if (val < 0x0020 || val > 0x4000 || val > hdev->le_adv_max_interval)
978 return -EINVAL;
979
980 hci_dev_lock(hdev);
981 hdev->le_adv_min_interval = val;
7d474e06
AG		 982 hci_dev_unlock(hdev);
983
984 return 0;
985}
986
729a1051 987static int adv_min_interval_get(void *data, u64 *val)
7d474e06 988{
729a1051
GL		 989 struct hci_dev *hdev = data;
990
991 hci_dev_lock(hdev);
992 *val = hdev->le_adv_min_interval;
993 hci_dev_unlock(hdev);
994
995 return 0;
7d474e06
AG		 996}
997
729a1051
GL		 998DEFINE_SIMPLE_ATTRIBUTE(adv_min_interval_fops, adv_min_interval_get,
999 adv_min_interval_set, "%llu\n");
1000
1001static int adv_max_interval_set(void *data, u64 val)
7d474e06 1002{
729a1051 1003 struct hci_dev *hdev = data;
7d474e06 1004
729a1051 1005 if (val < 0x0020 || val > 0x4000 || val < hdev->le_adv_min_interval)
7d474e06
AG		 1006 return -EINVAL;
1007
729a1051
GL		 1008 hci_dev_lock(hdev);
1009 hdev->le_adv_max_interval = val;
1010 hci_dev_unlock(hdev);
7d474e06 1011
729a1051
GL		 1012 return 0;
1013}
7d474e06 1014
729a1051
GL		 1015static int adv_max_interval_get(void *data, u64 *val)
1016{
1017 struct hci_dev *hdev = data;
7d474e06 1018
729a1051
GL		 1019 hci_dev_lock(hdev);
1020 *val = hdev->le_adv_max_interval;
1021 hci_dev_unlock(hdev);
7d474e06 1022
729a1051
GL		 1023 return 0;
1024}
7d474e06 1025
729a1051
GL		 1026DEFINE_SIMPLE_ATTRIBUTE(adv_max_interval_fops, adv_max_interval_get,
1027 adv_max_interval_set, "%llu\n");
7d474e06 1028
0b3c7d37 1029static int device_list_show(struct seq_file *f, void *ptr)
7d474e06 1030{
0b3c7d37 1031 struct hci_dev *hdev = f->private;
7d474e06 1032 struct hci_conn_params *p;
7d474e06 1033
7d474e06 1034 hci_dev_lock(hdev);
7d474e06 1035 list_for_each_entry(p, &hdev->le_conn_params, list) {
0b3c7d37 1036 seq_printf(f, "%pMR %u %u\n", &p->addr, p->addr_type,
7d474e06 1037 p->auto_connect);
7d474e06 1038 }
7d474e06 1039 hci_dev_unlock(hdev);
7d474e06 1040
7d474e06
AG		 1041 return 0;
1042}
7d474e06 1043
0b3c7d37 1044static int device_list_open(struct inode *inode, struct file *file)
7d474e06 1045{
0b3c7d37 1046 return single_open(file, device_list_show, inode->i_private);
7d474e06
AG		 1047}
1048
0b3c7d37
MH		 1049static const struct file_operations device_list_fops = {
1050 .open = device_list_open,
7d474e06 1051 .read = seq_read,
7d474e06
AG		 1052 .llseek = seq_lseek,
1053 .release = single_release,
1054};
1055
1da177e4
LT		 1056/* ---- HCI requests ---- */
1057
42c6b129 1058static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1da177e4 1059{
42c6b129 1060 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT		 1061
1062 if (hdev->req_status == HCI_REQ_PEND) {
1063 hdev->req_result = result;
1064 hdev->req_status = HCI_REQ_DONE;
1065 wake_up_interruptible(&hdev->req_wait_q);
1066 }
1067}
1068
1069static void hci_req_cancel(struct hci_dev *hdev, int err)
1070{
1071 BT_DBG("%s err 0x%2.2x", hdev->name, err);
1072
1073 if (hdev->req_status == HCI_REQ_PEND) {
1074 hdev->req_result = err;
1075 hdev->req_status = HCI_REQ_CANCELED;
1076 wake_up_interruptible(&hdev->req_wait_q);
1077 }
1078}
1079
77a63e0a
FW		 1080static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
1081 u8 event)
75e84b7c
JH		 1082{
1083 struct hci_ev_cmd_complete *ev;
1084 struct hci_event_hdr *hdr;
1085 struct sk_buff *skb;
1086
1087 hci_dev_lock(hdev);
1088
1089 skb = hdev->recv_evt;
1090 hdev->recv_evt = NULL;
1091
1092 hci_dev_unlock(hdev);
1093
1094 if (!skb)
1095 return ERR_PTR(-ENODATA);
1096
1097 if (skb->len < sizeof(*hdr)) {
1098 BT_ERR("Too short HCI event");
1099 goto failed;
1100 }
1101
1102 hdr = (void *) skb->data;
1103 skb_pull(skb, HCI_EVENT_HDR_SIZE);
1104
7b1abbbe
JH		 1105 if (event) {
1106 if (hdr->evt != event)
1107 goto failed;
1108 return skb;
1109 }
1110
75e84b7c
JH		 1111 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
1112 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
1113 goto failed;
1114 }
1115
1116 if (skb->len < sizeof(*ev)) {
1117 BT_ERR("Too short cmd_complete event");
1118 goto failed;
1119 }
1120
1121 ev = (void *) skb->data;
1122 skb_pull(skb, sizeof(*ev));
1123
1124 if (opcode == __le16_to_cpu(ev->opcode))
1125 return skb;
1126
1127 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
1128 __le16_to_cpu(ev->opcode));
1129
1130failed:
1131 kfree_skb(skb);
1132 return ERR_PTR(-ENODATA);
1133}
1134
7b1abbbe 1135struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 1136 const void *param, u8 event, u32 timeout)
75e84b7c
JH		 1137{
1138 DECLARE_WAITQUEUE(wait, current);
1139 struct hci_request req;
1140 int err = 0;
1141
1142 BT_DBG("%s", hdev->name);
1143
1144 hci_req_init(&req, hdev);
1145
7b1abbbe 1146 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH		 1147
1148 hdev->req_status = HCI_REQ_PEND;
1149
1150 err = hci_req_run(&req, hci_req_sync_complete);
1151 if (err < 0)
1152 return ERR_PTR(err);
1153
1154 add_wait_queue(&hdev->req_wait_q, &wait);
1155 set_current_state(TASK_INTERRUPTIBLE);
1156
1157 schedule_timeout(timeout);
1158
1159 remove_wait_queue(&hdev->req_wait_q, &wait);
1160
1161 if (signal_pending(current))
1162 return ERR_PTR(-EINTR);
1163
1164 switch (hdev->req_status) {
1165 case HCI_REQ_DONE:
1166 err = -bt_to_errno(hdev->req_result);
1167 break;
1168
1169 case HCI_REQ_CANCELED:
1170 err = -hdev->req_result;
1171 break;
1172
1173 default:
1174 err = -ETIMEDOUT;
1175 break;
1176 }
1177
1178 hdev->req_status = hdev->req_result = 0;
1179
1180 BT_DBG("%s end: err %d", hdev->name, err);
1181
1182 if (err < 0)
1183 return ERR_PTR(err);
1184
7b1abbbe
JH		 1185 return hci_get_cmd_complete(hdev, opcode, event);
1186}
1187EXPORT_SYMBOL(__hci_cmd_sync_ev);
1188
1189struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 1190 const void *param, u32 timeout)
7b1abbbe
JH		 1191{
1192 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH		 1193}
1194EXPORT_SYMBOL(__hci_cmd_sync);
1195
1da177e4 1196/* Execute request and wait for completion. */
01178cd4 1197static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 1198 void (*func)(struct hci_request *req,
1199 unsigned long opt),
01178cd4 1200 unsigned long opt, __u32 timeout)
1da177e4 1201{
42c6b129 1202 struct hci_request req;
1da177e4
LT		 1203 DECLARE_WAITQUEUE(wait, current);
1204 int err = 0;
1205
1206 BT_DBG("%s start", hdev->name);
1207
42c6b129
JH		 1208 hci_req_init(&req, hdev);
1209
1da177e4
LT		 1210 hdev->req_status = HCI_REQ_PEND;
1211
42c6b129 1212 func(&req, opt);
53cce22d 1213
42c6b129
JH		 1214 err = hci_req_run(&req, hci_req_sync_complete);
1215 if (err < 0) {
53cce22d 1216 hdev->req_status = 0;
920c8300
AG		 1217
1218 /* ENODATA means the HCI request command queue is empty.
1219 * This can happen when a request with conditionals doesn't
1220 * trigger any commands to be sent. This is normal behavior
1221 * and should not trigger an error return.
42c6b129 1222 */
920c8300
AG		 1223 if (err == -ENODATA)
1224 return 0;
1225
1226 return err;
53cce22d
JH		 1227 }
1228
bc4445c7
AG		 1229 add_wait_queue(&hdev->req_wait_q, &wait);
1230 set_current_state(TASK_INTERRUPTIBLE);
1231
1da177e4
LT		 1232 schedule_timeout(timeout);
1233
1234 remove_wait_queue(&hdev->req_wait_q, &wait);
1235
1236 if (signal_pending(current))
1237 return -EINTR;
1238
1239 switch (hdev->req_status) {
1240 case HCI_REQ_DONE:
e175072f 1241 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 1242 break;
1243
1244 case HCI_REQ_CANCELED:
1245 err = -hdev->req_result;
1246 break;
1247
1248 default:
1249 err = -ETIMEDOUT;
1250 break;
3ff50b79 1251 }
1da177e4 1252
a5040efa 1253 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 1254
1255 BT_DBG("%s end: err %d", hdev->name, err);
1256
1257 return err;
1258}
1259
01178cd4 1260static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 1261 void (*req)(struct hci_request *req,
1262 unsigned long opt),
01178cd4 1263 unsigned long opt, __u32 timeout)
1da177e4
LT		 1264{
1265 int ret;
1266
7c6a329e
MH		 1267 if (!test_bit(HCI_UP, &hdev->flags))
1268 return -ENETDOWN;
1269
1da177e4
LT		 1270 /* Serialize all requests */
1271 hci_req_lock(hdev);
01178cd4 1272 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 1273 hci_req_unlock(hdev);
1274
1275 return ret;
1276}
1277
42c6b129 1278static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 1279{
42c6b129 1280 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 1281
1282 /* Reset device */
42c6b129
JH		 1283 set_bit(HCI_RESET, &req->hdev->flags);
1284 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 1285}
1286
42c6b129 1287static void bredr_init(struct hci_request *req)
1da177e4 1288{
42c6b129 1289 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 1290
1da177e4 1291 /* Read Local Supported Features */
42c6b129 1292 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 1293
1143e5a6 1294 /* Read Local Version */
42c6b129 1295 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 1296
1297 /* Read BD Address */
42c6b129 1298 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 1299}
1300
42c6b129 1301static void amp_init(struct hci_request *req)
e61ef499 1302{
42c6b129 1303 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 1304
e61ef499 1305 /* Read Local Version */
42c6b129 1306 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489 1307
f6996cfe
MH		 1308 /* Read Local Supported Commands */
1309 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
1310
1311 /* Read Local Supported Features */
1312 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1313
6bcbc489 1314 /* Read Local AMP Info */
42c6b129 1315 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 1316
1317 /* Read Data Blk size */
42c6b129 1318 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
7528ca1c 1319
f38ba941
MH		 1320 /* Read Flow Control Mode */
1321 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
1322
7528ca1c
MH		 1323 /* Read Location Data */
1324 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
e61ef499
AE		 1325}
1326
42c6b129 1327static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 1328{
42c6b129 1329 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 1330
1331 BT_DBG("%s %ld", hdev->name, opt);
1332
11778716
AE		 1333 /* Reset */
1334 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 1335 hci_reset_req(req, 0);
11778716 1336
e61ef499
AE		 1337 switch (hdev->dev_type) {
1338 case HCI_BREDR:
42c6b129 1339 bredr_init(req);
e61ef499
AE		 1340 break;
1341
1342 case HCI_AMP:
42c6b129 1343 amp_init(req);
e61ef499
AE		 1344 break;
1345
1346 default:
1347 BT_ERR("Unknown device type %d", hdev->dev_type);
1348 break;
1349 }
e61ef499
AE		 1350}
1351
42c6b129 1352static void bredr_setup(struct hci_request *req)
2177bab5 1353{
4ca048e3
MH		 1354 struct hci_dev *hdev = req->hdev;
1355
2177bab5
JH		 1356 __le16 param;
1357 __u8 flt_type;
1358
1359 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 1360 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 1361
1362 /* Read Class of Device */
42c6b129 1363 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 1364
1365 /* Read Local Name */
42c6b129 1366 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 1367
1368 /* Read Voice Setting */
42c6b129 1369 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5 1370
b4cb9fb2
MH		 1371 /* Read Number of Supported IAC */
1372 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
1373
4b836f39
MH		 1374 /* Read Current IAC LAP */
1375 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
1376
2177bab5
JH		 1377 /* Clear Event Filters */
1378 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 1379 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 1380
1381 /* Connection accept timeout ~20 secs */
dcf4adbf 1382 param = cpu_to_le16(0x7d00);
42c6b129 1383 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 1384
4ca048e3
MH		 1385 /* AVM Berlin (31), aka "BlueFRITZ!", reports version 1.2,
1386 * but it does not support page scan related HCI commands.
1387 */
1388 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1) {
f332ec66
JH		 1389 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
1390 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
1391 }
2177bab5
JH		 1392}
1393
42c6b129 1394static void le_setup(struct hci_request *req)
2177bab5 1395{
c73eee91
JH		 1396 struct hci_dev *hdev = req->hdev;
1397
2177bab5 1398 /* Read LE Buffer Size */
42c6b129 1399 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 1400
1401 /* Read LE Local Supported Features */
42c6b129 1402 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5 1403
747d3f03
MH		 1404 /* Read LE Supported States */
1405 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
1406
2177bab5 1407 /* Read LE White List Size */
42c6b129 1408 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5 1409
747d3f03
MH		 1410 /* Clear LE White List */
1411 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
c73eee91
JH		 1412
1413 /* LE-only controllers have LE implicitly enabled */
1414 if (!lmp_bredr_capable(hdev))
1415 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 1416}
1417
1418static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
1419{
1420 if (lmp_ext_inq_capable(hdev))
1421 return 0x02;
1422
1423 if (lmp_inq_rssi_capable(hdev))
1424 return 0x01;
1425
1426 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
1427 hdev->lmp_subver == 0x0757)
1428 return 0x01;
1429
1430 if (hdev->manufacturer == 15) {
1431 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
1432 return 0x01;
1433 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
1434 return 0x01;
1435 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
1436 return 0x01;
1437 }
1438
1439 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
1440 hdev->lmp_subver == 0x1805)
1441 return 0x01;
1442
1443 return 0x00;
1444}
1445
42c6b129 1446static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 1447{
1448 u8 mode;
1449
42c6b129 1450 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 1451
42c6b129 1452 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 1453}
1454
42c6b129 1455static void hci_setup_event_mask(struct hci_request *req)
2177bab5 1456{
42c6b129
JH		 1457 struct hci_dev *hdev = req->hdev;
1458
2177bab5
JH		 1459 /* The second byte is 0xff instead of 0x9f (two reserved bits
1460 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
1461 * command otherwise.
1462 */
1463 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
1464
1465 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
1466 * any event mask for pre 1.2 devices.
1467 */
1468 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
1469 return;
1470
1471 if (lmp_bredr_capable(hdev)) {
1472 events[4] |= 0x01; /* Flow Specification Complete */
1473 events[4] |= 0x02; /* Inquiry Result with RSSI */
1474 events[4] |= 0x04; /* Read Remote Extended Features Complete */
1475 events[5] |= 0x08; /* Synchronous Connection Complete */
1476 events[5] |= 0x10; /* Synchronous Connection Changed */
c7882cbd
MH		 1477 } else {
1478 /* Use a different default for LE-only devices */
1479 memset(events, 0, sizeof(events));
1480 events[0] |= 0x10; /* Disconnection Complete */
c7882cbd
MH		 1481 events[1] |= 0x08; /* Read Remote Version Information Complete */
1482 events[1] |= 0x20; /* Command Complete */
1483 events[1] |= 0x40; /* Command Status */
1484 events[1] |= 0x80; /* Hardware Error */
1485 events[2] |= 0x04; /* Number of Completed Packets */
1486 events[3] |= 0x02; /* Data Buffer Overflow */
0da71f1b
MH		 1487
1488 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
1489 events[0] |= 0x80; /* Encryption Change */
1490 events[5] |= 0x80; /* Encryption Key Refresh Complete */
1491 }
2177bab5
JH		 1492 }
1493
1494 if (lmp_inq_rssi_capable(hdev))
1495 events[4] |= 0x02; /* Inquiry Result with RSSI */
1496
1497 if (lmp_sniffsubr_capable(hdev))
1498 events[5] |= 0x20; /* Sniff Subrating */
1499
1500 if (lmp_pause_enc_capable(hdev))
1501 events[5] |= 0x80; /* Encryption Key Refresh Complete */
1502
1503 if (lmp_ext_inq_capable(hdev))
1504 events[5] |= 0x40; /* Extended Inquiry Result */
1505
1506 if (lmp_no_flush_capable(hdev))
1507 events[7] |= 0x01; /* Enhanced Flush Complete */
1508
1509 if (lmp_lsto_capable(hdev))
1510 events[6] |= 0x80; /* Link Supervision Timeout Changed */
1511
1512 if (lmp_ssp_capable(hdev)) {
1513 events[6] |= 0x01; /* IO Capability Request */
1514 events[6] |= 0x02; /* IO Capability Response */
1515 events[6] |= 0x04; /* User Confirmation Request */
1516 events[6] |= 0x08; /* User Passkey Request */
1517 events[6] |= 0x10; /* Remote OOB Data Request */
1518 events[6] |= 0x20; /* Simple Pairing Complete */
1519 events[7] |= 0x04; /* User Passkey Notification */
1520 events[7] |= 0x08; /* Keypress Notification */
1521 events[7] |= 0x10; /* Remote Host Supported
1522 * Features Notification
1523 */
1524 }
1525
1526 if (lmp_le_capable(hdev))
1527 events[7] |= 0x20; /* LE Meta-Event */
1528
42c6b129 1529 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 1530}
1531
42c6b129 1532static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 1533{
42c6b129
JH		 1534 struct hci_dev *hdev = req->hdev;
1535
2177bab5 1536 if (lmp_bredr_capable(hdev))
42c6b129 1537 bredr_setup(req);
56f87901
JH		 1538 else
1539 clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2177bab5
JH		 1540
1541 if (lmp_le_capable(hdev))
42c6b129 1542 le_setup(req);
2177bab5 1543
3f8e2d75
JH		 1544 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
1545 * local supported commands HCI command.
1546 */
1547 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 1548 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 1549
1550 if (lmp_ssp_capable(hdev)) {
57af75a8
MH		 1551 /* When SSP is available, then the host features page
1552 * should also be available as well. However some
1553 * controllers list the max_page as 0 as long as SSP
1554 * has not been enabled. To achieve proper debugging
1555 * output, force the minimum max_page to 1 at least.
1556 */
1557 hdev->max_page = 0x01;
1558
2177bab5
JH		 1559 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
1560 u8 mode = 0x01;
42c6b129
JH		 1561 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
1562 sizeof(mode), &mode);
2177bab5
JH		 1563 } else {
1564 struct hci_cp_write_eir cp;
1565
1566 memset(hdev->eir, 0, sizeof(hdev->eir));
1567 memset(&cp, 0, sizeof(cp));
1568
42c6b129 1569 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 1570 }
1571 }
1572
1573 if (lmp_inq_rssi_capable(hdev))
42c6b129 1574 hci_setup_inquiry_mode(req);
2177bab5
JH		 1575
1576 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 1577 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 1578
1579 if (lmp_ext_feat_capable(hdev)) {
1580 struct hci_cp_read_local_ext_features cp;
1581
1582 cp.page = 0x01;
42c6b129
JH		 1583 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
1584 sizeof(cp), &cp);
2177bab5
JH		 1585 }
1586
1587 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
1588 u8 enable = 1;
42c6b129
JH		 1589 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
1590 &enable);
2177bab5
JH		 1591 }
1592}
1593
42c6b129 1594static void hci_setup_link_policy(struct hci_request *req)
2177bab5 1595{
42c6b129 1596 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 1597 struct hci_cp_write_def_link_policy cp;
1598 u16 link_policy = 0;
1599
1600 if (lmp_rswitch_capable(hdev))
1601 link_policy |= HCI_LP_RSWITCH;
1602 if (lmp_hold_capable(hdev))
1603 link_policy |= HCI_LP_HOLD;
1604 if (lmp_sniff_capable(hdev))
1605 link_policy |= HCI_LP_SNIFF;
1606 if (lmp_park_capable(hdev))
1607 link_policy |= HCI_LP_PARK;
1608
1609 cp.policy = cpu_to_le16(link_policy);
42c6b129 1610 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 1611}
1612
42c6b129 1613static void hci_set_le_support(struct hci_request *req)
2177bab5 1614{
42c6b129 1615 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 1616 struct hci_cp_write_le_host_supported cp;
1617
c73eee91
JH		 1618 /* LE-only devices do not support explicit enablement */
1619 if (!lmp_bredr_capable(hdev))
1620 return;
1621
2177bab5
JH		 1622 memset(&cp, 0, sizeof(cp));
1623
1624 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
1625 cp.le = 0x01;
32226e4f 1626 cp.simul = 0x00;
2177bab5
JH		 1627 }
1628
1629 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 1630 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
1631 &cp);
2177bab5
JH		 1632}
1633
d62e6d67
JH		 1634static void hci_set_event_mask_page_2(struct hci_request *req)
1635{
1636 struct hci_dev *hdev = req->hdev;
1637 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1638
1639 /* If Connectionless Slave Broadcast master role is supported
1640 * enable all necessary events for it.
1641 */
53b834d2 1642 if (lmp_csb_master_capable(hdev)) {
d62e6d67
JH		 1643 events[1] |= 0x40; /* Triggered Clock Capture */
1644 events[1] |= 0x80; /* Synchronization Train Complete */
1645 events[2] |= 0x10; /* Slave Page Response Timeout */
1646 events[2] |= 0x20; /* CSB Channel Map Change */
1647 }
1648
1649 /* If Connectionless Slave Broadcast slave role is supported
1650 * enable all necessary events for it.
1651 */
53b834d2 1652 if (lmp_csb_slave_capable(hdev)) {
d62e6d67
JH		 1653 events[2] |= 0x01; /* Synchronization Train Received */
1654 events[2] |= 0x02; /* CSB Receive */
1655 events[2] |= 0x04; /* CSB Timeout */
1656 events[2] |= 0x08; /* Truncated Page Complete */
1657 }
1658
40c59fcb 1659 /* Enable Authenticated Payload Timeout Expired event if supported */
cd7ca0ec 1660 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
40c59fcb
MH		 1661 events[2] |= 0x80;
1662
d62e6d67
JH		 1663 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
1664}
1665
42c6b129 1666static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 1667{
42c6b129 1668 struct hci_dev *hdev = req->hdev;
d2c5d77f 1669 u8 p;
42c6b129 1670
0da71f1b
MH		 1671 hci_setup_event_mask(req);
1672
b8f4e068
GP		 1673 /* Some Broadcom based Bluetooth controllers do not support the
1674 * Delete Stored Link Key command. They are clearly indicating its
1675 * absence in the bit mask of supported commands.
1676 *
1677 * Check the supported commands and only if the the command is marked
1678 * as supported send it. If not supported assume that the controller
1679 * does not have actual support for stored link keys which makes this
1680 * command redundant anyway.
f9f462fa
MH		 1681 *
1682 * Some controllers indicate that they support handling deleting
1683 * stored link keys, but they don't. The quirk lets a driver
1684 * just disable this command.
637b4cae 1685 */
f9f462fa
MH		 1686 if (hdev->commands[6] & 0x80 &&
1687 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
59f45d57
JH		 1688 struct hci_cp_delete_stored_link_key cp;
1689
1690 bacpy(&cp.bdaddr, BDADDR_ANY);
1691 cp.delete_all = 0x01;
1692 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
1693 sizeof(cp), &cp);
1694 }
1695
2177bab5 1696 if (hdev->commands[5] & 0x10)
42c6b129 1697 hci_setup_link_policy(req);
2177bab5 1698
9193c6e8
AG		 1699 if (lmp_le_capable(hdev)) {
1700 u8 events[8];
1701
1702 memset(events, 0, sizeof(events));
4d6c705b
MH		 1703 events[0] = 0x0f;
1704
1705 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
1706 events[0] |= 0x10; /* LE Long Term Key Request */
662bc2e6
AG		 1707
1708 /* If controller supports the Connection Parameters Request
1709 * Link Layer Procedure, enable the corresponding event.
1710 */
1711 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
1712 events[0] |= 0x20; /* LE Remote Connection
1713 * Parameter Request
1714 */
1715
9193c6e8
AG		 1716 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
1717 events);
1718
15a49cca
MH		 1719 if (hdev->commands[25] & 0x40) {
1720 /* Read LE Advertising Channel TX Power */
1721 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
1722 }
1723
42c6b129 1724 hci_set_le_support(req);
9193c6e8 1725 }
d2c5d77f
JH		 1726
1727 /* Read features beyond page 1 if available */
1728 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
1729 struct hci_cp_read_local_ext_features cp;
1730
1731 cp.page = p;
1732 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
1733 sizeof(cp), &cp);
1734 }
2177bab5
JH		 1735}
1736
5d4e7e8d
JH		 1737static void hci_init4_req(struct hci_request *req, unsigned long opt)
1738{
1739 struct hci_dev *hdev = req->hdev;
1740
d62e6d67
JH		 1741 /* Set event mask page 2 if the HCI command for it is supported */
1742 if (hdev->commands[22] & 0x04)
1743 hci_set_event_mask_page_2(req);
1744
109e3191
MH		 1745 /* Read local codec list if the HCI command is supported */
1746 if (hdev->commands[29] & 0x20)
1747 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
1748
f4fe73ed
MH		 1749 /* Get MWS transport configuration if the HCI command is supported */
1750 if (hdev->commands[30] & 0x08)
1751 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
1752
5d4e7e8d 1753 /* Check for Synchronization Train support */
53b834d2 1754 if (lmp_sync_train_capable(hdev))
5d4e7e8d 1755 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
a6d0d690
MH		 1756
1757 /* Enable Secure Connections if supported and configured */
5afeac14 1758 if ((lmp_sc_capable(hdev) ||
111902f7 1759 test_bit(HCI_FORCE_SC, &hdev->dbg_flags)) &&
a6d0d690
MH		 1760 test_bit(HCI_SC_ENABLED, &hdev->dev_flags)) {
1761 u8 support = 0x01;
1762 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
1763 sizeof(support), &support);
1764 }
5d4e7e8d
JH		 1765}
1766
2177bab5
JH		 1767static int __hci_init(struct hci_dev *hdev)
1768{
1769 int err;
1770
1771 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
1772 if (err < 0)
1773 return err;
1774
4b4148e9
MH		 1775 /* The Device Under Test (DUT) mode is special and available for
1776 * all controller types. So just create it early on.
1777 */
1778 if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
1779 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
1780 &dut_mode_fops);
1781 }
1782
2177bab5
JH		 1783 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
1784 * BR/EDR/LE type controllers. AMP controllers only need the
1785 * first stage init.
1786 */
1787 if (hdev->dev_type != HCI_BREDR)
1788 return 0;
1789
1790 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
1791 if (err < 0)
1792 return err;
1793
5d4e7e8d
JH		 1794 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
1795 if (err < 0)
1796 return err;
1797
baf27f6e
MH		 1798 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
1799 if (err < 0)
1800 return err;
1801
1802 /* Only create debugfs entries during the initial setup
1803 * phase and not every time the controller gets powered on.
1804 */
1805 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1806 return 0;
1807
dfb826a8
MH		 1808 debugfs_create_file("features", 0444, hdev->debugfs, hdev,
1809 &features_fops);
ceeb3bc0
MH		 1810 debugfs_create_u16("manufacturer", 0444, hdev->debugfs,
1811 &hdev->manufacturer);
1812 debugfs_create_u8("hci_version", 0444, hdev->debugfs, &hdev->hci_ver);
1813 debugfs_create_u16("hci_revision", 0444, hdev->debugfs, &hdev->hci_rev);
70afe0b8
MH		 1814 debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev,
1815 &blacklist_fops);
6659358e
JH		 1816 debugfs_create_file("whitelist", 0444, hdev->debugfs, hdev,
1817 &whitelist_fops);
47219839
MH		 1818 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
1819
31ad1691
AK		 1820 debugfs_create_file("conn_info_min_age", 0644, hdev->debugfs, hdev,
1821 &conn_info_min_age_fops);
1822 debugfs_create_file("conn_info_max_age", 0644, hdev->debugfs, hdev,
1823 &conn_info_max_age_fops);
1824
baf27f6e
MH		 1825 if (lmp_bredr_capable(hdev)) {
1826 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
1827 hdev, &inquiry_cache_fops);
02d08d15
MH		 1828 debugfs_create_file("link_keys", 0400, hdev->debugfs,
1829 hdev, &link_keys_fops);
babdbb3c
MH		 1830 debugfs_create_file("dev_class", 0444, hdev->debugfs,
1831 hdev, &dev_class_fops);
041000b9
MH		 1832 debugfs_create_file("voice_setting", 0444, hdev->debugfs,
1833 hdev, &voice_setting_fops);
baf27f6e
MH		 1834 }
1835
06f5b778 1836 if (lmp_ssp_capable(hdev)) {
ebd1e33b
MH		 1837 debugfs_create_file("auto_accept_delay", 0644, hdev->debugfs,
1838 hdev, &auto_accept_delay_fops);
5afeac14
MH		 1839 debugfs_create_file("force_sc_support", 0644, hdev->debugfs,
1840 hdev, &force_sc_support_fops);
134c2a89
MH		 1841 debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
1842 hdev, &sc_only_mode_fops);
06f5b778 1843 }
ebd1e33b 1844
2bfa3531
MH		 1845 if (lmp_sniff_capable(hdev)) {
1846 debugfs_create_file("idle_timeout", 0644, hdev->debugfs,
1847 hdev, &idle_timeout_fops);
1848 debugfs_create_file("sniff_min_interval", 0644, hdev->debugfs,
1849 hdev, &sniff_min_interval_fops);
1850 debugfs_create_file("sniff_max_interval", 0644, hdev->debugfs,
1851 hdev, &sniff_max_interval_fops);
1852 }
1853
d0f729b8 1854 if (lmp_le_capable(hdev)) {
ac345813
MH		 1855 debugfs_create_file("identity", 0400, hdev->debugfs,
1856 hdev, &identity_fops);
1857 debugfs_create_file("rpa_timeout", 0644, hdev->debugfs,
1858 hdev, &rpa_timeout_fops);
7a4cd51d
MH		 1859 debugfs_create_file("random_address", 0444, hdev->debugfs,
1860 hdev, &random_address_fops);
b32bba6c
MH		 1861 debugfs_create_file("static_address", 0444, hdev->debugfs,
1862 hdev, &static_address_fops);
1863
1864 /* For controllers with a public address, provide a debug
1865 * option to force the usage of the configured static
1866 * address. By default the public address is used.
1867 */
1868 if (bacmp(&hdev->bdaddr, BDADDR_ANY))
1869 debugfs_create_file("force_static_address", 0644,
1870 hdev->debugfs, hdev,
1871 &force_static_address_fops);
1872
d0f729b8
MH		 1873 debugfs_create_u8("white_list_size", 0444, hdev->debugfs,
1874 &hdev->le_white_list_size);
d2ab0ac1
MH		 1875 debugfs_create_file("white_list", 0444, hdev->debugfs, hdev,
1876 &white_list_fops);
3698d704
MH		 1877 debugfs_create_file("identity_resolving_keys", 0400,
1878 hdev->debugfs, hdev,
1879 &identity_resolving_keys_fops);
8f8625cd
MH		 1880 debugfs_create_file("long_term_keys", 0400, hdev->debugfs,
1881 hdev, &long_term_keys_fops);
4e70c7e7
MH		 1882 debugfs_create_file("conn_min_interval", 0644, hdev->debugfs,
1883 hdev, &conn_min_interval_fops);
1884 debugfs_create_file("conn_max_interval", 0644, hdev->debugfs,
1885 hdev, &conn_max_interval_fops);
816a93d1
MH		 1886 debugfs_create_file("conn_latency", 0644, hdev->debugfs,
1887 hdev, &conn_latency_fops);
f1649577
MH		 1888 debugfs_create_file("supervision_timeout", 0644, hdev->debugfs,
1889 hdev, &supervision_timeout_fops);
3f959d46
MH		 1890 debugfs_create_file("adv_channel_map", 0644, hdev->debugfs,
1891 hdev, &adv_channel_map_fops);
729a1051
GL		 1892 debugfs_create_file("adv_min_interval", 0644, hdev->debugfs,
1893 hdev, &adv_min_interval_fops);
1894 debugfs_create_file("adv_max_interval", 0644, hdev->debugfs,
1895 hdev, &adv_max_interval_fops);
0b3c7d37
MH		 1896 debugfs_create_file("device_list", 0444, hdev->debugfs, hdev,
1897 &device_list_fops);
b9a7a61e
LR		 1898 debugfs_create_u16("discov_interleaved_timeout", 0644,
1899 hdev->debugfs,
1900 &hdev->discov_interleaved_timeout);
54506918 1901
711eafe3 1902 smp_register(hdev);
d0f729b8 1903 }
e7b8fc92 1904
baf27f6e 1905 return 0;
2177bab5
JH		 1906}
1907
0ebca7d6
MH		 1908static void hci_init0_req(struct hci_request *req, unsigned long opt)
1909{
1910 struct hci_dev *hdev = req->hdev;
1911
1912 BT_DBG("%s %ld", hdev->name, opt);
1913
1914 /* Reset */
1915 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
1916 hci_reset_req(req, 0);
1917
1918 /* Read Local Version */
1919 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1920
1921 /* Read BD Address */
1922 if (hdev->set_bdaddr)
1923 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1924}
1925
1926static int __hci_unconf_init(struct hci_dev *hdev)
1927{
1928 int err;
1929
cc78b44b
MH		 1930 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1931 return 0;
1932
0ebca7d6
MH		 1933 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
1934 if (err < 0)
1935 return err;
1936
1937 return 0;
1938}
1939
42c6b129 1940static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1941{
1942 __u8 scan = opt;
1943
42c6b129 1944 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 1945
1946 /* Inquiry and Page scans */
42c6b129 1947 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 1948}
1949
42c6b129 1950static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1951{
1952 __u8 auth = opt;
1953
42c6b129 1954 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 1955
1956 /* Authentication */
42c6b129 1957 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 1958}
1959
42c6b129 1960static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1961{
1962 __u8 encrypt = opt;
1963
42c6b129 1964 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 1965
e4e8e37c 1966 /* Encryption */
42c6b129 1967 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 1968}
1969
42c6b129 1970static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 1971{
1972 __le16 policy = cpu_to_le16(opt);
1973
42c6b129 1974 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 1975
1976 /* Default link policy */
42c6b129 1977 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 1978}
1979
8e87d142 1980/* Get HCI device by index.
1da177e4
LT		 1981 * Device is held on return. */
1982struct hci_dev *hci_dev_get(int index)
1983{
8035ded4 1984 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 1985
1986 BT_DBG("%d", index);
1987
1988 if (index < 0)
1989 return NULL;
1990
1991 read_lock(&hci_dev_list_lock);
8035ded4 1992 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 1993 if (d->id == index) {
1994 hdev = hci_dev_hold(d);
1995 break;
1996 }
1997 }
1998 read_unlock(&hci_dev_list_lock);
1999 return hdev;
2000}
1da177e4
LT		 2001
2002/* ---- Inquiry support ---- */
ff9ef578 2003
30dc78e1
JH		 2004bool hci_discovery_active(struct hci_dev *hdev)
2005{
2006 struct discovery_state *discov = &hdev->discovery;
2007
6fbe195d 2008 switch (discov->state) {
343f935b 2009 case DISCOVERY_FINDING:
6fbe195d 2010 case DISCOVERY_RESOLVING:
30dc78e1
JH		 2011 return true;
2012
6fbe195d
AG		 2013 default:
2014 return false;
2015 }
30dc78e1
JH		 2016}
2017
ff9ef578
JH		 2018void hci_discovery_set_state(struct hci_dev *hdev, int state)
2019{
bb3e0a33
JH		 2020 int old_state = hdev->discovery.state;
2021
ff9ef578
JH		 2022 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
2023
bb3e0a33 2024 if (old_state == state)
ff9ef578
JH		 2025 return;
2026
bb3e0a33
JH		 2027 hdev->discovery.state = state;
2028
ff9ef578
JH		 2029 switch (state) {
2030 case DISCOVERY_STOPPED:
c54c3860
AG		 2031 hci_update_background_scan(hdev);
2032
bb3e0a33 2033 if (old_state != DISCOVERY_STARTING)
7b99b659 2034 mgmt_discovering(hdev, 0);
ff9ef578
JH		 2035 break;
2036 case DISCOVERY_STARTING:
2037 break;
343f935b 2038 case DISCOVERY_FINDING:
ff9ef578
JH		 2039 mgmt_discovering(hdev, 1);
2040 break;
30dc78e1
JH		 2041 case DISCOVERY_RESOLVING:
2042 break;
ff9ef578
JH		 2043 case DISCOVERY_STOPPING:
2044 break;
2045 }
ff9ef578
JH		 2046}
2047
1f9b9a5d 2048void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 2049{
30883512 2050 struct discovery_state *cache = &hdev->discovery;
b57c1a56 2051 struct inquiry_entry *p, *n;
1da177e4 2052
561aafbc
JH		 2053 list_for_each_entry_safe(p, n, &cache->all, all) {
2054 list_del(&p->all);
b57c1a56 2055 kfree(p);
1da177e4 2056 }
561aafbc
JH		 2057
2058 INIT_LIST_HEAD(&cache->unknown);
2059 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 2060}
2061
a8c5fb1a
GP		 2062struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
2063 bdaddr_t *bdaddr)
1da177e4 2064{
30883512 2065 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 2066 struct inquiry_entry *e;
2067
6ed93dc6 2068 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 2069
561aafbc
JH		 2070 list_for_each_entry(e, &cache->all, all) {
2071 if (!bacmp(&e->data.bdaddr, bdaddr))
2072 return e;
2073 }
2074
2075 return NULL;
2076}
2077
2078struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 2079 bdaddr_t *bdaddr)
561aafbc 2080{
30883512 2081 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 2082 struct inquiry_entry *e;
2083
6ed93dc6 2084 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 2085
2086 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 2087 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 2088 return e;
2089 }
2090
2091 return NULL;
1da177e4
LT		 2092}
2093
30dc78e1 2094struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 2095 bdaddr_t *bdaddr,
2096 int state)
30dc78e1
JH		 2097{
2098 struct discovery_state *cache = &hdev->discovery;
2099 struct inquiry_entry *e;
2100
6ed93dc6 2101 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 2102
2103 list_for_each_entry(e, &cache->resolve, list) {
2104 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
2105 return e;
2106 if (!bacmp(&e->data.bdaddr, bdaddr))
2107 return e;
2108 }
2109
2110 return NULL;
2111}
2112
a3d4e20a 2113void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 2114 struct inquiry_entry *ie)
a3d4e20a
JH		 2115{
2116 struct discovery_state *cache = &hdev->discovery;
2117 struct list_head *pos = &cache->resolve;
2118 struct inquiry_entry *p;
2119
2120 list_del(&ie->list);
2121
2122 list_for_each_entry(p, &cache->resolve, list) {
2123 if (p->name_state != NAME_PENDING &&
a8c5fb1a 2124 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 2125 break;
2126 pos = &p->list;
2127 }
2128
2129 list_add(&ie->list, pos);
2130}
2131
af58925c
MH		 2132u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
2133 bool name_known)
1da177e4 2134{
30883512 2135 struct discovery_state *cache = &hdev->discovery;
70f23020 2136 struct inquiry_entry *ie;
af58925c 2137 u32 flags = 0;
1da177e4 2138
6ed93dc6 2139 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 2140
2b2fec4d
SJ		 2141 hci_remove_remote_oob_data(hdev, &data->bdaddr);
2142
af58925c
MH		 2143 if (!data->ssp_mode)
2144 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
388fc8fa 2145
70f23020 2146 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 2147 if (ie) {
af58925c
MH		 2148 if (!ie->data.ssp_mode)
2149 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
388fc8fa 2150
a3d4e20a 2151 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 2152 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 2153 ie->data.rssi = data->rssi;
2154 hci_inquiry_cache_update_resolve(hdev, ie);
2155 }
2156
561aafbc 2157 goto update;
a3d4e20a 2158 }
561aafbc
JH		 2159
2160 /* Entry not in the cache. Add new one. */
27f70f3e 2161 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
af58925c
MH		 2162 if (!ie) {
2163 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
2164 goto done;
2165 }
561aafbc
JH		 2166
2167 list_add(&ie->all, &cache->all);
2168
2169 if (name_known) {
2170 ie->name_state = NAME_KNOWN;
2171 } else {
2172 ie->name_state = NAME_NOT_KNOWN;
2173 list_add(&ie->list, &cache->unknown);
2174 }
70f23020 2175
561aafbc
JH		 2176update:
2177 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 2178 ie->name_state != NAME_PENDING) {
561aafbc
JH		 2179 ie->name_state = NAME_KNOWN;
2180 list_del(&ie->list);
1da177e4
LT		 2181 }
2182
70f23020
AE		 2183 memcpy(&ie->data, data, sizeof(*data));
2184 ie->timestamp = jiffies;
1da177e4 2185 cache->timestamp = jiffies;
3175405b
JH		 2186
2187 if (ie->name_state == NAME_NOT_KNOWN)
af58925c 2188 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
3175405b 2189
af58925c
MH		 2190done:
2191 return flags;
1da177e4
LT		 2192}
2193
2194static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
2195{
30883512 2196 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 2197 struct inquiry_info *info = (struct inquiry_info *) buf;
2198 struct inquiry_entry *e;
2199 int copied = 0;
2200
561aafbc 2201 list_for_each_entry(e, &cache->all, all) {
1da177e4 2202 struct inquiry_data *data = &e->data;
b57c1a56
JH		 2203
2204 if (copied >= num)
2205 break;
2206
1da177e4
LT		 2207 bacpy(&info->bdaddr, &data->bdaddr);
2208 info->pscan_rep_mode = data->pscan_rep_mode;
2209 info->pscan_period_mode = data->pscan_period_mode;
2210 info->pscan_mode = data->pscan_mode;
2211 memcpy(info->dev_class, data->dev_class, 3);
2212 info->clock_offset = data->clock_offset;
b57c1a56 2213
1da177e4 2214 info++;
b57c1a56 2215 copied++;
1da177e4
LT		 2216 }
2217
2218 BT_DBG("cache %p, copied %d", cache, copied);
2219 return copied;
2220}
2221
42c6b129 2222static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 2223{
2224 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 2225 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 2226 struct hci_cp_inquiry cp;
2227
2228 BT_DBG("%s", hdev->name);
2229
2230 if (test_bit(HCI_INQUIRY, &hdev->flags))
2231 return;
2232
2233 /* Start Inquiry */
2234 memcpy(&cp.lap, &ir->lap, 3);
2235 cp.length = ir->length;
2236 cp.num_rsp = ir->num_rsp;
42c6b129 2237 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 2238}
2239
2240int hci_inquiry(void __user *arg)
2241{
2242 __u8 __user *ptr = arg;
2243 struct hci_inquiry_req ir;
2244 struct hci_dev *hdev;
2245 int err = 0, do_inquiry = 0, max_rsp;
2246 long timeo;
2247 __u8 *buf;
2248
2249 if (copy_from_user(&ir, ptr, sizeof(ir)))
2250 return -EFAULT;
2251
5a08ecce
AE		 2252 hdev = hci_dev_get(ir.dev_id);
2253 if (!hdev)
1da177e4
LT		 2254 return -ENODEV;
2255
0736cfa8
MH		 2256 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2257 err = -EBUSY;
2258 goto done;
2259 }
2260
4a964404 2261 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 2262 err = -EOPNOTSUPP;
2263 goto done;
2264 }
2265
5b69bef5
MH		 2266 if (hdev->dev_type != HCI_BREDR) {
2267 err = -EOPNOTSUPP;
2268 goto done;
2269 }
2270
56f87901
JH		 2271 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
2272 err = -EOPNOTSUPP;
2273 goto done;
2274 }
2275
09fd0de5 2276 hci_dev_lock(hdev);
8e87d142 2277 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 2278 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 2279 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 2280 do_inquiry = 1;
2281 }
09fd0de5 2282 hci_dev_unlock(hdev);
1da177e4 2283
04837f64 2284 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 2285
2286 if (do_inquiry) {
01178cd4
JH		 2287 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
2288 timeo);
70f23020
AE		 2289 if (err < 0)
2290 goto done;
3e13fa1e
AG		 2291
2292 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
2293 * cleared). If it is interrupted by a signal, return -EINTR.
2294 */
74316201 2295 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
3e13fa1e
AG		 2296 TASK_INTERRUPTIBLE))
2297 return -EINTR;
70f23020 2298 }
1da177e4 2299
8fc9ced3
GP		 2300 /* for unlimited number of responses we will use buffer with
2301 * 255 entries
2302 */
1da177e4
LT		 2303 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
2304
2305 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
2306 * copy it to the user space.
2307 */
01df8c31 2308 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 2309 if (!buf) {
1da177e4
LT		 2310 err = -ENOMEM;
2311 goto done;
2312 }
2313
09fd0de5 2314 hci_dev_lock(hdev);
1da177e4 2315 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 2316 hci_dev_unlock(hdev);
1da177e4
LT		 2317
2318 BT_DBG("num_rsp %d", ir.num_rsp);
2319
2320 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
2321 ptr += sizeof(ir);
2322 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 2323 ir.num_rsp))
1da177e4 2324 err = -EFAULT;
8e87d142 2325 } else
1da177e4
LT		 2326 err = -EFAULT;
2327
2328 kfree(buf);
2329
2330done:
2331 hci_dev_put(hdev);
2332 return err;
2333}
2334
cbed0ca1 2335static int hci_dev_do_open(struct hci_dev *hdev)
1da177e4 2336{
1da177e4
LT		 2337 int ret = 0;
2338
1da177e4
LT		 2339 BT_DBG("%s %p", hdev->name, hdev);
2340
2341 hci_req_lock(hdev);
2342
94324962
JH		 2343 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
2344 ret = -ENODEV;
2345 goto done;
2346 }
2347
d603b76b
MH		 2348 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
2349 !test_bit(HCI_CONFIG, &hdev->dev_flags)) {
a5c8f270
MH		 2350 /* Check for rfkill but allow the HCI setup stage to
2351 * proceed (which in itself doesn't cause any RF activity).
2352 */
2353 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
2354 ret = -ERFKILL;
2355 goto done;
2356 }
2357
2358 /* Check for valid public address or a configured static
2359 * random adddress, but let the HCI setup proceed to
2360 * be able to determine if there is a public address
2361 * or not.
2362 *
c6beca0e
MH		 2363 * In case of user channel usage, it is not important
2364 * if a public address or static random address is
2365 * available.
2366 *
a5c8f270
MH		 2367 * This check is only valid for BR/EDR controllers
2368 * since AMP controllers do not have an address.
2369 */
c6beca0e
MH		 2370 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
2371 hdev->dev_type == HCI_BREDR &&
a5c8f270
MH		 2372 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2373 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
2374 ret = -EADDRNOTAVAIL;
2375 goto done;
2376 }
611b30f7
MH		 2377 }
2378
1da177e4
LT		 2379 if (test_bit(HCI_UP, &hdev->flags)) {
2380 ret = -EALREADY;
2381 goto done;
2382 }
2383
1da177e4
LT		 2384 if (hdev->open(hdev)) {
2385 ret = -EIO;
2386 goto done;
2387 }
2388
f41c70c4
MH		 2389 atomic_set(&hdev->cmd_cnt, 1);
2390 set_bit(HCI_INIT, &hdev->flags);
2391
af202f84
MH		 2392 if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
2393 if (hdev->setup)
2394 ret = hdev->setup(hdev);
f41c70c4 2395
af202f84
MH		 2396 /* The transport driver can set these quirks before
2397 * creating the HCI device or in its setup callback.
2398 *
2399 * In case any of them is set, the controller has to
2400 * start up as unconfigured.
2401 */
eb1904f4
MH		 2402 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
2403 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
89bc22d2 2404 set_bit(HCI_UNCONFIGURED, &hdev->dev_flags);
f41c70c4 2405
0ebca7d6
MH		 2406 /* For an unconfigured controller it is required to
2407 * read at least the version information provided by
2408 * the Read Local Version Information command.
2409 *
2410 * If the set_bdaddr driver callback is provided, then
2411 * also the original Bluetooth public device address
2412 * will be read using the Read BD Address command.
2413 */
2414 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
2415 ret = __hci_unconf_init(hdev);
89bc22d2
MH		 2416 }
2417
9713c17b
MH		 2418 if (test_bit(HCI_CONFIG, &hdev->dev_flags)) {
2419 /* If public address change is configured, ensure that
2420 * the address gets programmed. If the driver does not
2421 * support changing the public address, fail the power
2422 * on procedure.
2423 */
2424 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
2425 hdev->set_bdaddr)
24c457e2
MH		 2426 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
2427 else
2428 ret = -EADDRNOTAVAIL;
2429 }
2430
f41c70c4 2431 if (!ret) {
4a964404 2432 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
0736cfa8 2433 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
f41c70c4 2434 ret = __hci_init(hdev);
1da177e4
LT		 2435 }
2436
f41c70c4
MH		 2437 clear_bit(HCI_INIT, &hdev->flags);
2438
1da177e4
LT		 2439 if (!ret) {
2440 hci_dev_hold(hdev);
d6bfd59c 2441 set_bit(HCI_RPA_EXPIRED, &hdev->dev_flags);
1da177e4
LT		 2442 set_bit(HCI_UP, &hdev->flags);
2443 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a 2444 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
d603b76b 2445 !test_bit(HCI_CONFIG, &hdev->dev_flags) &&
4a964404 2446 !test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
0736cfa8 2447 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1514b892 2448 hdev->dev_type == HCI_BREDR) {
09fd0de5 2449 hci_dev_lock(hdev);
744cf19e 2450 mgmt_powered(hdev, 1);
09fd0de5 2451 hci_dev_unlock(hdev);
56e5cb86 2452 }
8e87d142 2453 } else {
1da177e4 2454 /* Init failed, cleanup */
3eff45ea 2455 flush_work(&hdev->tx_work);
c347b765 2456 flush_work(&hdev->cmd_work);
b78752cc 2457 flush_work(&hdev->rx_work);
1da177e4
LT		 2458
2459 skb_queue_purge(&hdev->cmd_q);
2460 skb_queue_purge(&hdev->rx_q);
2461
2462 if (hdev->flush)
2463 hdev->flush(hdev);
2464
2465 if (hdev->sent_cmd) {
2466 kfree_skb(hdev->sent_cmd);
2467 hdev->sent_cmd = NULL;
2468 }
2469
2470 hdev->close(hdev);
fee746b0 2471 hdev->flags &= BIT(HCI_RAW);
1da177e4
LT		 2472 }
2473
2474done:
2475 hci_req_unlock(hdev);
1da177e4
LT		 2476 return ret;
2477}
2478
cbed0ca1
JH		 2479/* ---- HCI ioctl helpers ---- */
2480
2481int hci_dev_open(__u16 dev)
2482{
2483 struct hci_dev *hdev;
2484 int err;
2485
2486 hdev = hci_dev_get(dev);
2487 if (!hdev)
2488 return -ENODEV;
2489
4a964404 2490 /* Devices that are marked as unconfigured can only be powered
fee746b0
MH		 2491 * up as user channel. Trying to bring them up as normal devices
2492 * will result into a failure. Only user channel operation is
2493 * possible.
2494 *
2495 * When this function is called for a user channel, the flag
2496 * HCI_USER_CHANNEL will be set first before attempting to
2497 * open the device.
2498 */
4a964404 2499 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
fee746b0
MH		 2500 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2501 err = -EOPNOTSUPP;
2502 goto done;
2503 }
2504
e1d08f40
JH		 2505 /* We need to ensure that no other power on/off work is pending
2506 * before proceeding to call hci_dev_do_open. This is
2507 * particularly important if the setup procedure has not yet
2508 * completed.
2509 */
2510 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2511 cancel_delayed_work(&hdev->power_off);
2512
a5c8f270
MH		 2513 /* After this call it is guaranteed that the setup procedure
2514 * has finished. This means that error conditions like RFKILL
2515 * or no valid public or static random address apply.
2516 */
e1d08f40
JH		 2517 flush_workqueue(hdev->req_workqueue);
2518
12aa4f0a 2519 /* For controllers not using the management interface and that
b6ae8457 2520 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
12aa4f0a
MH		 2521 * so that pairing works for them. Once the management interface
2522 * is in use this bit will be cleared again and userspace has
2523 * to explicitly enable it.
2524 */
2525 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
2526 !test_bit(HCI_MGMT, &hdev->dev_flags))
b6ae8457 2527 set_bit(HCI_BONDABLE, &hdev->dev_flags);
12aa4f0a 2528
cbed0ca1
JH		 2529 err = hci_dev_do_open(hdev);
2530
fee746b0 2531done:
cbed0ca1 2532 hci_dev_put(hdev);
cbed0ca1
JH		 2533 return err;
2534}
2535
d7347f3c
JH		 2536/* This function requires the caller holds hdev->lock */
2537static void hci_pend_le_actions_clear(struct hci_dev *hdev)
2538{
2539 struct hci_conn_params *p;
2540
f161dd41
JH		 2541 list_for_each_entry(p, &hdev->le_conn_params, list) {
2542 if (p->conn) {
2543 hci_conn_drop(p->conn);
f8aaf9b6 2544 hci_conn_put(p->conn);
f161dd41
JH		 2545 p->conn = NULL;
2546 }
d7347f3c 2547 list_del_init(&p->action);
f161dd41 2548 }
d7347f3c
JH		 2549
2550 BT_DBG("All LE pending actions cleared");
2551}
2552
1da177e4
LT		 2553static int hci_dev_do_close(struct hci_dev *hdev)
2554{
2555 BT_DBG("%s %p", hdev->name, hdev);
2556
78c04c0b
VCG		 2557 cancel_delayed_work(&hdev->power_off);
2558
1da177e4
LT		 2559 hci_req_cancel(hdev, ENODEV);
2560 hci_req_lock(hdev);
2561
2562 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
65cc2b49 2563 cancel_delayed_work_sync(&hdev->cmd_timer);
1da177e4
LT		 2564 hci_req_unlock(hdev);
2565 return 0;
2566 }
2567
3eff45ea
GP		 2568 /* Flush RX and TX works */
2569 flush_work(&hdev->tx_work);
b78752cc 2570 flush_work(&hdev->rx_work);
1da177e4 2571
16ab91ab 2572 if (hdev->discov_timeout > 0) {
e0f9309f 2573 cancel_delayed_work(&hdev->discov_off);
16ab91ab 2574 hdev->discov_timeout = 0;
5e5282bb 2575 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
310a3d48 2576 clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 2577 }
2578
a8b2d5c2 2579 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 2580 cancel_delayed_work(&hdev->service_cache);
2581
7ba8b4be 2582 cancel_delayed_work_sync(&hdev->le_scan_disable);
4518bb0f
JH		 2583
2584 if (test_bit(HCI_MGMT, &hdev->dev_flags))
2585 cancel_delayed_work_sync(&hdev->rpa_expired);
7ba8b4be 2586
09fd0de5 2587 hci_dev_lock(hdev);
1f9b9a5d 2588 hci_inquiry_cache_flush(hdev);
d7347f3c 2589 hci_pend_le_actions_clear(hdev);
f161dd41 2590 hci_conn_hash_flush(hdev);
09fd0de5 2591 hci_dev_unlock(hdev);
1da177e4
LT		 2592
2593 hci_notify(hdev, HCI_DEV_DOWN);
2594
2595 if (hdev->flush)
2596 hdev->flush(hdev);
2597
2598 /* Reset device */
2599 skb_queue_purge(&hdev->cmd_q);
2600 atomic_set(&hdev->cmd_cnt, 1);
4a964404
MH		 2601 if (!test_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
2602 !test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
a6c511c6 2603 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 2604 set_bit(HCI_INIT, &hdev->flags);
01178cd4 2605 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 2606 clear_bit(HCI_INIT, &hdev->flags);
2607 }
2608
c347b765
GP		 2609 /* flush cmd work */
2610 flush_work(&hdev->cmd_work);
1da177e4
LT		 2611
2612 /* Drop queues */
2613 skb_queue_purge(&hdev->rx_q);
2614 skb_queue_purge(&hdev->cmd_q);
2615 skb_queue_purge(&hdev->raw_q);
2616
2617 /* Drop last sent command */
2618 if (hdev->sent_cmd) {
65cc2b49 2619 cancel_delayed_work_sync(&hdev->cmd_timer);
1da177e4
LT		 2620 kfree_skb(hdev->sent_cmd);
2621 hdev->sent_cmd = NULL;
2622 }
2623
b6ddb638
JH		 2624 kfree_skb(hdev->recv_evt);
2625 hdev->recv_evt = NULL;
2626
1da177e4
LT		 2627 /* After this point our queues are empty
2628 * and no tasks are scheduled. */
2629 hdev->close(hdev);
2630
35b973c9 2631 /* Clear flags */
fee746b0 2632 hdev->flags &= BIT(HCI_RAW);
35b973c9
JH		 2633 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
2634
93c311a0
MH		 2635 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
2636 if (hdev->dev_type == HCI_BREDR) {
2637 hci_dev_lock(hdev);
2638 mgmt_powered(hdev, 0);
2639 hci_dev_unlock(hdev);
2640 }
8ee56540 2641 }
5add6af8 2642
ced5c338 2643 /* Controller radio is available but is currently powered down */
536619e8 2644 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 2645
e59fda8d 2646 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 2647 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
7a4cd51d 2648 bacpy(&hdev->random_addr, BDADDR_ANY);
e59fda8d 2649
1da177e4
LT		 2650 hci_req_unlock(hdev);
2651
2652 hci_dev_put(hdev);
2653 return 0;
2654}
2655
2656int hci_dev_close(__u16 dev)
2657{
2658 struct hci_dev *hdev;
2659 int err;
2660
70f23020
AE		 2661 hdev = hci_dev_get(dev);
2662 if (!hdev)
1da177e4 2663 return -ENODEV;
8ee56540 2664
0736cfa8
MH		 2665 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2666 err = -EBUSY;
2667 goto done;
2668 }
2669
8ee56540
MH		 2670 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2671 cancel_delayed_work(&hdev->power_off);
2672
1da177e4 2673 err = hci_dev_do_close(hdev);
8ee56540 2674
0736cfa8 2675done:
1da177e4
LT		 2676 hci_dev_put(hdev);
2677 return err;
2678}
2679
2680int hci_dev_reset(__u16 dev)
2681{
2682 struct hci_dev *hdev;
2683 int ret = 0;
2684
70f23020
AE		 2685 hdev = hci_dev_get(dev);
2686 if (!hdev)
1da177e4
LT		 2687 return -ENODEV;
2688
2689 hci_req_lock(hdev);
1da177e4 2690
808a049e
MH		 2691 if (!test_bit(HCI_UP, &hdev->flags)) {
2692 ret = -ENETDOWN;
1da177e4 2693 goto done;
808a049e 2694 }
1da177e4 2695
0736cfa8
MH		 2696 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2697 ret = -EBUSY;
2698 goto done;
2699 }
2700
4a964404 2701 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 2702 ret = -EOPNOTSUPP;
2703 goto done;
2704 }
2705
1da177e4
LT		 2706 /* Drop queues */
2707 skb_queue_purge(&hdev->rx_q);
2708 skb_queue_purge(&hdev->cmd_q);
2709
09fd0de5 2710 hci_dev_lock(hdev);
1f9b9a5d 2711 hci_inquiry_cache_flush(hdev);
1da177e4 2712 hci_conn_hash_flush(hdev);
09fd0de5 2713 hci_dev_unlock(hdev);
1da177e4
LT		 2714
2715 if (hdev->flush)
2716 hdev->flush(hdev);
2717
8e87d142 2718 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 2719 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4 2720
fee746b0 2721 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 2722
2723done:
1da177e4
LT		 2724 hci_req_unlock(hdev);
2725 hci_dev_put(hdev);
2726 return ret;
2727}
2728
2729int hci_dev_reset_stat(__u16 dev)
2730{
2731 struct hci_dev *hdev;
2732 int ret = 0;
2733
70f23020
AE		 2734 hdev = hci_dev_get(dev);
2735 if (!hdev)
1da177e4
LT		 2736 return -ENODEV;
2737
0736cfa8
MH		 2738 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2739 ret = -EBUSY;
2740 goto done;
2741 }
2742
4a964404 2743 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 2744 ret = -EOPNOTSUPP;
2745 goto done;
2746 }
2747
1da177e4
LT		 2748 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
2749
0736cfa8 2750done:
1da177e4 2751 hci_dev_put(hdev);
1da177e4
LT		 2752 return ret;
2753}
2754
123abc08
JH		 2755static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
2756{
bc6d2d04 2757 bool conn_changed, discov_changed;
123abc08
JH		 2758
2759 BT_DBG("%s scan 0x%02x", hdev->name, scan);
2760
2761 if ((scan & SCAN_PAGE))
2762 conn_changed = !test_and_set_bit(HCI_CONNECTABLE,
2763 &hdev->dev_flags);
2764 else
2765 conn_changed = test_and_clear_bit(HCI_CONNECTABLE,
2766 &hdev->dev_flags);
2767
bc6d2d04
JH		 2768 if ((scan & SCAN_INQUIRY)) {
2769 discov_changed = !test_and_set_bit(HCI_DISCOVERABLE,
2770 &hdev->dev_flags);
2771 } else {
2772 clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
2773 discov_changed = test_and_clear_bit(HCI_DISCOVERABLE,
2774 &hdev->dev_flags);
2775 }
2776
123abc08
JH		 2777 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
2778 return;
2779
bc6d2d04
JH		 2780 if (conn_changed || discov_changed) {
2781 /* In case this was disabled through mgmt */
2782 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2783
2784 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
2785 mgmt_update_adv_data(hdev);
2786
123abc08 2787 mgmt_new_settings(hdev);
bc6d2d04 2788 }
123abc08
JH		 2789}
2790
1da177e4
LT		 2791int hci_dev_cmd(unsigned int cmd, void __user *arg)
2792{
2793 struct hci_dev *hdev;
2794 struct hci_dev_req dr;
2795 int err = 0;
2796
2797 if (copy_from_user(&dr, arg, sizeof(dr)))
2798 return -EFAULT;
2799
70f23020
AE		 2800 hdev = hci_dev_get(dr.dev_id);
2801 if (!hdev)
1da177e4
LT		 2802 return -ENODEV;
2803
0736cfa8
MH		 2804 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2805 err = -EBUSY;
2806 goto done;
2807 }
2808
4a964404 2809 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 2810 err = -EOPNOTSUPP;
2811 goto done;
2812 }
2813
5b69bef5
MH		 2814 if (hdev->dev_type != HCI_BREDR) {
2815 err = -EOPNOTSUPP;
2816 goto done;
2817 }
2818
56f87901
JH		 2819 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
2820 err = -EOPNOTSUPP;
2821 goto done;
2822 }
2823
1da177e4
LT		 2824 switch (cmd) {
2825 case HCISETAUTH:
01178cd4
JH		 2826 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2827 HCI_INIT_TIMEOUT);
1da177e4
LT		 2828 break;
2829
2830 case HCISETENCRYPT:
2831 if (!lmp_encrypt_capable(hdev)) {
2832 err = -EOPNOTSUPP;
2833 break;
2834 }
2835
2836 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2837 /* Auth must be enabled first */
01178cd4
JH		 2838 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2839 HCI_INIT_TIMEOUT);
1da177e4
LT		 2840 if (err)
2841 break;
2842 }
2843
01178cd4
JH		 2844 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2845 HCI_INIT_TIMEOUT);
1da177e4
LT		 2846 break;
2847
2848 case HCISETSCAN:
01178cd4
JH		 2849 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2850 HCI_INIT_TIMEOUT);
91a668b0 2851
bc6d2d04
JH		 2852 /* Ensure that the connectable and discoverable states
2853 * get correctly modified as this was a non-mgmt change.
91a668b0 2854 */
123abc08
JH		 2855 if (!err)
2856 hci_update_scan_state(hdev, dr.dev_opt);
1da177e4
LT		 2857 break;
2858
1da177e4 2859 case HCISETLINKPOL:
01178cd4
JH		 2860 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2861 HCI_INIT_TIMEOUT);
1da177e4
LT		 2862 break;
2863
2864 case HCISETLINKMODE:
e4e8e37c
MH		 2865 hdev->link_mode = ((__u16) dr.dev_opt) &
2866 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2867 break;
2868
2869 case HCISETPTYPE:
2870 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 2871 break;
2872
2873 case HCISETACLMTU:
e4e8e37c
MH		 2874 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2875 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 2876 break;
2877
2878 case HCISETSCOMTU:
e4e8e37c
MH		 2879 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2880 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 2881 break;
2882
2883 default:
2884 err = -EINVAL;
2885 break;
2886 }
e4e8e37c 2887
0736cfa8 2888done:
1da177e4
LT		 2889 hci_dev_put(hdev);
2890 return err;
2891}
2892
2893int hci_get_dev_list(void __user *arg)
2894{
8035ded4 2895 struct hci_dev *hdev;
1da177e4
LT		 2896 struct hci_dev_list_req *dl;
2897 struct hci_dev_req *dr;
1da177e4
LT		 2898 int n = 0, size, err;
2899 __u16 dev_num;
2900
2901 if (get_user(dev_num, (__u16 __user *) arg))
2902 return -EFAULT;
2903
2904 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2905 return -EINVAL;
2906
2907 size = sizeof(*dl) + dev_num * sizeof(*dr);
2908
70f23020
AE		 2909 dl = kzalloc(size, GFP_KERNEL);
2910 if (!dl)
1da177e4
LT		 2911 return -ENOMEM;
2912
2913 dr = dl->dev_req;
2914
f20d09d5 2915 read_lock(&hci_dev_list_lock);
8035ded4 2916 list_for_each_entry(hdev, &hci_dev_list, list) {
2e84d8db 2917 unsigned long flags = hdev->flags;
c542a06c 2918
2e84d8db
MH		 2919 /* When the auto-off is configured it means the transport
2920 * is running, but in that case still indicate that the
2921 * device is actually down.
2922 */
2923 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2924 flags &= ~BIT(HCI_UP);
c542a06c 2925
1da177e4 2926 (dr + n)->dev_id = hdev->id;
2e84d8db 2927 (dr + n)->dev_opt = flags;
c542a06c 2928
1da177e4
LT		 2929 if (++n >= dev_num)
2930 break;
2931 }
f20d09d5 2932 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 2933
2934 dl->dev_num = n;
2935 size = sizeof(*dl) + n * sizeof(*dr);
2936
2937 err = copy_to_user(arg, dl, size);
2938 kfree(dl);
2939
2940 return err ? -EFAULT : 0;
2941}
2942
2943int hci_get_dev_info(void __user *arg)
2944{
2945 struct hci_dev *hdev;
2946 struct hci_dev_info di;
2e84d8db 2947 unsigned long flags;
1da177e4
LT		 2948 int err = 0;
2949
2950 if (copy_from_user(&di, arg, sizeof(di)))
2951 return -EFAULT;
2952
70f23020
AE		 2953 hdev = hci_dev_get(di.dev_id);
2954 if (!hdev)
1da177e4
LT		 2955 return -ENODEV;
2956
2e84d8db
MH		 2957 /* When the auto-off is configured it means the transport
2958 * is running, but in that case still indicate that the
2959 * device is actually down.
2960 */
2961 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2962 flags = hdev->flags & ~BIT(HCI_UP);
2963 else
2964 flags = hdev->flags;
c542a06c 2965
1da177e4
LT		 2966 strcpy(di.name, hdev->name);
2967 di.bdaddr = hdev->bdaddr;
60f2a3ed 2968 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2e84d8db 2969 di.flags = flags;
1da177e4 2970 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 2971 if (lmp_bredr_capable(hdev)) {
2972 di.acl_mtu = hdev->acl_mtu;
2973 di.acl_pkts = hdev->acl_pkts;
2974 di.sco_mtu = hdev->sco_mtu;
2975 di.sco_pkts = hdev->sco_pkts;
2976 } else {
2977 di.acl_mtu = hdev->le_mtu;
2978 di.acl_pkts = hdev->le_pkts;
2979 di.sco_mtu = 0;
2980 di.sco_pkts = 0;
2981 }
1da177e4
LT		 2982 di.link_policy = hdev->link_policy;
2983 di.link_mode = hdev->link_mode;
2984
2985 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2986 memcpy(&di.features, &hdev->features, sizeof(di.features));
2987
2988 if (copy_to_user(arg, &di, sizeof(di)))
2989 err = -EFAULT;
2990
2991 hci_dev_put(hdev);
2992
2993 return err;
2994}
2995
2996/* ---- Interface to HCI drivers ---- */
2997
611b30f7
MH		 2998static int hci_rfkill_set_block(void *data, bool blocked)
2999{
3000 struct hci_dev *hdev = data;
3001
3002 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
3003
0736cfa8
MH		 3004 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
3005 return -EBUSY;
3006
5e130367
JH		 3007 if (blocked) {
3008 set_bit(HCI_RFKILLED, &hdev->dev_flags);
d603b76b
MH		 3009 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
3010 !test_bit(HCI_CONFIG, &hdev->dev_flags))
bf543036 3011 hci_dev_do_close(hdev);
5e130367
JH		 3012 } else {
3013 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1025c04c 3014 }
611b30f7
MH		 3015
3016 return 0;
3017}
3018
3019static const struct rfkill_ops hci_rfkill_ops = {
3020 .set_block = hci_rfkill_set_block,
3021};
3022
ab81cbf9
JH		 3023static void hci_power_on(struct work_struct *work)
3024{
3025 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 3026 int err;
ab81cbf9
JH		 3027
3028 BT_DBG("%s", hdev->name);
3029
cbed0ca1 3030 err = hci_dev_do_open(hdev);
96570ffc
JH		 3031 if (err < 0) {
3032 mgmt_set_powered_failed(hdev, err);
ab81cbf9 3033 return;
96570ffc 3034 }
ab81cbf9 3035
a5c8f270
MH		 3036 /* During the HCI setup phase, a few error conditions are
3037 * ignored and they need to be checked now. If they are still
3038 * valid, it is important to turn the device back off.
3039 */
3040 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) ||
4a964404 3041 test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) ||
a5c8f270
MH		 3042 (hdev->dev_type == HCI_BREDR &&
3043 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
3044 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
bf543036
JH		 3045 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
3046 hci_dev_do_close(hdev);
3047 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
19202573
JH		 3048 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
3049 HCI_AUTO_OFF_TIMEOUT);
bf543036 3050 }
ab81cbf9 3051
fee746b0 3052 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags)) {
4a964404
MH		 3053 /* For unconfigured devices, set the HCI_RAW flag
3054 * so that userspace can easily identify them.
4a964404
MH		 3055 */
3056 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
3057 set_bit(HCI_RAW, &hdev->flags);
0602a8ad
MH		 3058
3059 /* For fully configured devices, this will send
3060 * the Index Added event. For unconfigured devices,
3061 * it will send Unconfigued Index Added event.
3062 *
3063 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
3064 * and no event will be send.
3065 */
3066 mgmt_index_added(hdev);
d603b76b 3067 } else if (test_and_clear_bit(HCI_CONFIG, &hdev->dev_flags)) {
5ea234d3
MH		 3068 /* When the controller is now configured, then it
3069 * is important to clear the HCI_RAW flag.
3070 */
3071 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
3072 clear_bit(HCI_RAW, &hdev->flags);
3073
d603b76b
MH		 3074 /* Powering on the controller with HCI_CONFIG set only
3075 * happens with the transition from unconfigured to
3076 * configured. This will send the Index Added event.
3077 */
744cf19e 3078 mgmt_index_added(hdev);
fee746b0 3079 }
ab81cbf9
JH		 3080}
3081
3082static void hci_power_off(struct work_struct *work)
3083{
3243553f 3084 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 3085 power_off.work);
ab81cbf9
JH		 3086
3087 BT_DBG("%s", hdev->name);
3088
8ee56540 3089 hci_dev_do_close(hdev);
ab81cbf9
JH		 3090}
3091
16ab91ab
JH		 3092static void hci_discov_off(struct work_struct *work)
3093{
3094 struct hci_dev *hdev;
16ab91ab
JH		 3095
3096 hdev = container_of(work, struct hci_dev, discov_off.work);
3097
3098 BT_DBG("%s", hdev->name);
3099
d1967ff8 3100 mgmt_discoverable_timeout(hdev);
16ab91ab
JH		 3101}
3102
35f7498a 3103void hci_uuids_clear(struct hci_dev *hdev)
2aeb9a1a 3104{
4821002c 3105 struct bt_uuid *uuid, *tmp;
2aeb9a1a 3106
4821002c
JH		 3107 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
3108 list_del(&uuid->list);
2aeb9a1a
JH		 3109 kfree(uuid);
3110 }
2aeb9a1a
JH		 3111}
3112
35f7498a 3113void hci_link_keys_clear(struct hci_dev *hdev)
55ed8ca1
JH		 3114{
3115 struct list_head *p, *n;
3116
3117 list_for_each_safe(p, n, &hdev->link_keys) {
3118 struct link_key *key;
3119
3120 key = list_entry(p, struct link_key, list);
3121
3122 list_del(p);
3123 kfree(key);
3124 }
55ed8ca1
JH		 3125}
3126
35f7498a 3127void hci_smp_ltks_clear(struct hci_dev *hdev)
b899efaf
VCG		 3128{
3129 struct smp_ltk *k, *tmp;
3130
3131 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
3132 list_del(&k->list);
3133 kfree(k);
3134 }
b899efaf
VCG		 3135}
3136
970c4e46
JH		 3137void hci_smp_irks_clear(struct hci_dev *hdev)
3138{
3139 struct smp_irk *k, *tmp;
3140
3141 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
3142 list_del(&k->list);
3143 kfree(k);
3144 }
3145}
3146
55ed8ca1
JH		 3147struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
3148{
8035ded4 3149 struct link_key *k;
55ed8ca1 3150
8035ded4 3151 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 3152 if (bacmp(bdaddr, &k->bdaddr) == 0)
3153 return k;
55ed8ca1
JH		 3154
3155 return NULL;
3156}
3157
745c0ce3 3158static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 3159 u8 key_type, u8 old_key_type)
d25e28ab
JH		 3160{
3161 /* Legacy key */
3162 if (key_type < 0x03)
745c0ce3 3163 return true;
d25e28ab
JH		 3164
3165 /* Debug keys are insecure so don't store them persistently */
3166 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 3167 return false;
d25e28ab
JH		 3168
3169 /* Changed combination key and there's no previous one */
3170 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 3171 return false;
d25e28ab
JH		 3172
3173 /* Security mode 3 case */
3174 if (!conn)
745c0ce3 3175 return true;
d25e28ab
JH		 3176
3177 /* Neither local nor remote side had no-bonding as requirement */
3178 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 3179 return true;
d25e28ab
JH		 3180
3181 /* Local side had dedicated bonding as requirement */
3182 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 3183 return true;
d25e28ab
JH		 3184
3185 /* Remote side had dedicated bonding as requirement */
3186 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 3187 return true;
d25e28ab
JH		 3188
3189 /* If none of the above criteria match, then don't store the key
3190 * persistently */
745c0ce3 3191 return false;
d25e28ab
JH		 3192}
3193
e804d25d 3194static u8 ltk_role(u8 type)
98a0b845 3195{
e804d25d
JH		 3196 if (type == SMP_LTK)
3197 return HCI_ROLE_MASTER;
98a0b845 3198
e804d25d 3199 return HCI_ROLE_SLAVE;
98a0b845
JH		 3200}
3201
fe39c7b2 3202struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, __le64 rand,
e804d25d 3203 u8 role)
75d262c2 3204{
c9839a11 3205 struct smp_ltk *k;
75d262c2 3206
c9839a11 3207 list_for_each_entry(k, &hdev->long_term_keys, list) {
fe39c7b2 3208 if (k->ediv != ediv || k->rand != rand)
75d262c2
VCG		 3209 continue;
3210
e804d25d 3211 if (ltk_role(k->type) != role)
98a0b845
JH		 3212 continue;
3213
c9839a11 3214 return k;
75d262c2
VCG		 3215 }
3216
3217 return NULL;
3218}
75d262c2 3219
c9839a11 3220struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
e804d25d 3221 u8 addr_type, u8 role)
75d262c2 3222{
c9839a11 3223 struct smp_ltk *k;
75d262c2 3224
c9839a11
VCG		 3225 list_for_each_entry(k, &hdev->long_term_keys, list)
3226 if (addr_type == k->bdaddr_type &&
98a0b845 3227 bacmp(bdaddr, &k->bdaddr) == 0 &&
e804d25d 3228 ltk_role(k->type) == role)
75d262c2
VCG		 3229 return k;
3230
3231 return NULL;
3232}
75d262c2 3233
970c4e46
JH		 3234struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
3235{
3236 struct smp_irk *irk;
3237
3238 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
3239 if (!bacmp(&irk->rpa, rpa))
3240 return irk;
3241 }
3242
3243 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
defce9e8 3244 if (smp_irk_matches(hdev, irk->val, rpa)) {
970c4e46
JH		 3245 bacpy(&irk->rpa, rpa);
3246 return irk;
3247 }
3248 }
3249
3250 return NULL;
3251}
3252
3253struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
3254 u8 addr_type)
3255{
3256 struct smp_irk *irk;
3257
6cfc9988
JH		 3258 /* Identity Address must be public or static random */
3259 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
3260 return NULL;
3261
970c4e46
JH		 3262 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
3263 if (addr_type == irk->addr_type &&
3264 bacmp(bdaddr, &irk->bdaddr) == 0)
3265 return irk;
3266 }
3267
3268 return NULL;
3269}
3270
567fa2aa 3271struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
7652ff6a
JH		 3272 bdaddr_t *bdaddr, u8 *val, u8 type,
3273 u8 pin_len, bool *persistent)
55ed8ca1
JH		 3274{
3275 struct link_key *key, *old_key;
745c0ce3 3276 u8 old_key_type;
55ed8ca1
JH		 3277
3278 old_key = hci_find_link_key(hdev, bdaddr);
3279 if (old_key) {
3280 old_key_type = old_key->type;
3281 key = old_key;
3282 } else {
12adcf3a 3283 old_key_type = conn ? conn->key_type : 0xff;
0a14ab41 3284 key = kzalloc(sizeof(*key), GFP_KERNEL);
55ed8ca1 3285 if (!key)
567fa2aa 3286 return NULL;
55ed8ca1
JH		 3287 list_add(&key->list, &hdev->link_keys);
3288 }
3289
6ed93dc6 3290 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 3291
d25e28ab
JH		 3292 /* Some buggy controller combinations generate a changed
3293 * combination key for legacy pairing even when there's no
3294 * previous key */
3295 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 3296 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 3297 type = HCI_LK_COMBINATION;
655fe6ec
JH		 3298 if (conn)
3299 conn->key_type = type;
3300 }
d25e28ab 3301
55ed8ca1 3302 bacpy(&key->bdaddr, bdaddr);
9b3b4460 3303 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 3304 key->pin_len = pin_len;
3305
b6020ba0 3306 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 3307 key->type = old_key_type;
4748fed2
JH		 3308 else
3309 key->type = type;
3310
7652ff6a
JH		 3311 if (persistent)
3312 *persistent = hci_persistent_key(hdev, conn, type,
3313 old_key_type);
4df378a1 3314
567fa2aa 3315 return key;
55ed8ca1
JH		 3316}
3317
ca9142b8 3318struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
35d70271 3319 u8 addr_type, u8 type, u8 authenticated,
fe39c7b2 3320 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
75d262c2 3321{
c9839a11 3322 struct smp_ltk *key, *old_key;
e804d25d 3323 u8 role = ltk_role(type);
75d262c2 3324
e804d25d 3325 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type, role);
c9839a11 3326 if (old_key)
75d262c2 3327 key = old_key;
c9839a11 3328 else {
0a14ab41 3329 key = kzalloc(sizeof(*key), GFP_KERNEL);
75d262c2 3330 if (!key)
ca9142b8 3331 return NULL;
c9839a11 3332 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 3333 }
3334
75d262c2 3335 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 3336 key->bdaddr_type = addr_type;
3337 memcpy(key->val, tk, sizeof(key->val));
3338 key->authenticated = authenticated;
3339 key->ediv = ediv;
fe39c7b2 3340 key->rand = rand;
c9839a11
VCG		 3341 key->enc_size = enc_size;
3342 key->type = type;
75d262c2 3343
ca9142b8 3344 return key;
75d262c2
VCG		 3345}
3346
ca9142b8
JH		 3347struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
3348 u8 addr_type, u8 val[16], bdaddr_t *rpa)
970c4e46
JH		 3349{
3350 struct smp_irk *irk;
3351
3352 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
3353 if (!irk) {
3354 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
3355 if (!irk)
ca9142b8 3356 return NULL;
970c4e46
JH		 3357
3358 bacpy(&irk->bdaddr, bdaddr);
3359 irk->addr_type = addr_type;
3360
3361 list_add(&irk->list, &hdev->identity_resolving_keys);
3362 }
3363
3364 memcpy(irk->val, val, 16);
3365 bacpy(&irk->rpa, rpa);
3366
ca9142b8 3367 return irk;
970c4e46
JH		 3368}
3369
55ed8ca1
JH		 3370int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
3371{
3372 struct link_key *key;
3373
3374 key = hci_find_link_key(hdev, bdaddr);
3375 if (!key)
3376 return -ENOENT;
3377
6ed93dc6 3378 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 3379
3380 list_del(&key->list);
3381 kfree(key);
3382
3383 return 0;
3384}
3385
e0b2b27e 3386int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
b899efaf
VCG		 3387{
3388 struct smp_ltk *k, *tmp;
c51ffa0b 3389 int removed = 0;
b899efaf
VCG		 3390
3391 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
e0b2b27e 3392 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
b899efaf
VCG		 3393 continue;
3394
6ed93dc6 3395 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 3396
3397 list_del(&k->list);
3398 kfree(k);
c51ffa0b 3399 removed++;
b899efaf
VCG		 3400 }
3401
c51ffa0b 3402 return removed ? 0 : -ENOENT;
b899efaf
VCG		 3403}
3404
a7ec7338
JH		 3405void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
3406{
3407 struct smp_irk *k, *tmp;
3408
668b7b19 3409 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
a7ec7338
JH		 3410 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
3411 continue;
3412
3413 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
3414
3415 list_del(&k->list);
3416 kfree(k);
3417 }
3418}
3419
6bd32326 3420/* HCI command timer function */
65cc2b49 3421static void hci_cmd_timeout(struct work_struct *work)
6bd32326 3422{
65cc2b49
MH		 3423 struct hci_dev *hdev = container_of(work, struct hci_dev,
3424 cmd_timer.work);
6bd32326 3425
bda4f23a
AE		 3426 if (hdev->sent_cmd) {
3427 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
3428 u16 opcode = __le16_to_cpu(sent->opcode);
3429
3430 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
3431 } else {
3432 BT_ERR("%s command tx timeout", hdev->name);
3433 }
3434
6bd32326 3435 atomic_set(&hdev->cmd_cnt, 1);
c347b765 3436 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 3437}
3438
2763eda6 3439struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 3440 bdaddr_t *bdaddr)
2763eda6
SJ		 3441{
3442 struct oob_data *data;
3443
3444 list_for_each_entry(data, &hdev->remote_oob_data, list)
3445 if (bacmp(bdaddr, &data->bdaddr) == 0)
3446 return data;
3447
3448 return NULL;
3449}
3450
3451int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
3452{
3453 struct oob_data *data;
3454
3455 data = hci_find_remote_oob_data(hdev, bdaddr);
3456 if (!data)
3457 return -ENOENT;
3458
6ed93dc6 3459 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 3460
3461 list_del(&data->list);
3462 kfree(data);
3463
3464 return 0;
3465}
3466
35f7498a 3467void hci_remote_oob_data_clear(struct hci_dev *hdev)
2763eda6
SJ		 3468{
3469 struct oob_data *data, *n;
3470
3471 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
3472 list_del(&data->list);
3473 kfree(data);
3474 }
2763eda6
SJ		 3475}
3476
0798872e
MH		 3477int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
3478 u8 *hash, u8 *randomizer)
2763eda6
SJ		 3479{
3480 struct oob_data *data;
3481
3482 data = hci_find_remote_oob_data(hdev, bdaddr);
2763eda6 3483 if (!data) {
0a14ab41 3484 data = kmalloc(sizeof(*data), GFP_KERNEL);
2763eda6
SJ		 3485 if (!data)
3486 return -ENOMEM;
3487
3488 bacpy(&data->bdaddr, bdaddr);
3489 list_add(&data->list, &hdev->remote_oob_data);
3490 }
3491
519ca9d0
MH		 3492 memcpy(data->hash192, hash, sizeof(data->hash192));
3493 memcpy(data->randomizer192, randomizer, sizeof(data->randomizer192));
2763eda6 3494
0798872e
MH		 3495 memset(data->hash256, 0, sizeof(data->hash256));
3496 memset(data->randomizer256, 0, sizeof(data->randomizer256));
3497
3498 BT_DBG("%s for %pMR", hdev->name, bdaddr);
3499
3500 return 0;
3501}
3502
3503int hci_add_remote_oob_ext_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
3504 u8 *hash192, u8 *randomizer192,
3505 u8 *hash256, u8 *randomizer256)
3506{
3507 struct oob_data *data;
3508
3509 data = hci_find_remote_oob_data(hdev, bdaddr);
3510 if (!data) {
0a14ab41 3511 data = kmalloc(sizeof(*data), GFP_KERNEL);
0798872e
MH		 3512 if (!data)
3513 return -ENOMEM;
3514
3515 bacpy(&data->bdaddr, bdaddr);
3516 list_add(&data->list, &hdev->remote_oob_data);
3517 }
3518
3519 memcpy(data->hash192, hash192, sizeof(data->hash192));
3520 memcpy(data->randomizer192, randomizer192, sizeof(data->randomizer192));
3521
3522 memcpy(data->hash256, hash256, sizeof(data->hash256));
3523 memcpy(data->randomizer256, randomizer256, sizeof(data->randomizer256));
3524
6ed93dc6 3525 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 3526
3527 return 0;
3528}
3529
dcc36c16 3530struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
b9ee0a78 3531 bdaddr_t *bdaddr, u8 type)
b2a66aad 3532{
8035ded4 3533 struct bdaddr_list *b;
b2a66aad 3534
dcc36c16 3535 list_for_each_entry(b, bdaddr_list, list) {
b9ee0a78 3536 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
b2a66aad 3537 return b;
b9ee0a78 3538 }
b2a66aad
AJ		 3539
3540 return NULL;
3541}
3542
dcc36c16 3543void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
b2a66aad
AJ		 3544{
3545 struct list_head *p, *n;
3546
dcc36c16 3547 list_for_each_safe(p, n, bdaddr_list) {
b9ee0a78 3548 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
b2a66aad
AJ		 3549
3550 list_del(p);
3551 kfree(b);
3552 }
b2a66aad
AJ		 3553}
3554
dcc36c16 3555int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 3556{
3557 struct bdaddr_list *entry;
b2a66aad 3558
b9ee0a78 3559 if (!bacmp(bdaddr, BDADDR_ANY))
b2a66aad
AJ		 3560 return -EBADF;
3561
dcc36c16 3562 if (hci_bdaddr_list_lookup(list, bdaddr, type))
5e762444 3563 return -EEXIST;
b2a66aad 3564
27f70f3e 3565 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
5e762444
AJ		 3566 if (!entry)
3567 return -ENOMEM;
b2a66aad
AJ		 3568
3569 bacpy(&entry->bdaddr, bdaddr);
b9ee0a78 3570 entry->bdaddr_type = type;
b2a66aad 3571
dcc36c16 3572 list_add(&entry->list, list);
b2a66aad 3573
2a8357f2 3574 return 0;
b2a66aad
AJ		 3575}
3576
dcc36c16 3577int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 3578{
3579 struct bdaddr_list *entry;
b2a66aad 3580
35f7498a 3581 if (!bacmp(bdaddr, BDADDR_ANY)) {
dcc36c16 3582 hci_bdaddr_list_clear(list);
35f7498a
JH		 3583 return 0;
3584 }
b2a66aad 3585
dcc36c16 3586 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
d2ab0ac1
MH		 3587 if (!entry)
3588 return -ENOENT;
3589
3590 list_del(&entry->list);
3591 kfree(entry);
3592
3593 return 0;
3594}
3595
15819a70
AG		 3596/* This function requires the caller holds hdev->lock */
3597struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3598 bdaddr_t *addr, u8 addr_type)
3599{
3600 struct hci_conn_params *params;
3601
738f6185
JH		 3602 /* The conn params list only contains identity addresses */
3603 if (!hci_is_identity_address(addr, addr_type))
3604 return NULL;
3605
15819a70
AG		 3606 list_for_each_entry(params, &hdev->le_conn_params, list) {
3607 if (bacmp(&params->addr, addr) == 0 &&
3608 params->addr_type == addr_type) {
3609 return params;
3610 }
3611 }
3612
3613 return NULL;
3614}
3615
cef952ce
AG		 3616static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
3617{
3618 struct hci_conn *conn;
3619
3620 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);
3621 if (!conn)
3622 return false;
3623
3624 if (conn->dst_type != type)
3625 return false;
3626
3627 if (conn->state != BT_CONNECTED)
3628 return false;
3629
3630 return true;
3631}
3632
4b10966f 3633/* This function requires the caller holds hdev->lock */
501f8827
JH		 3634struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3635 bdaddr_t *addr, u8 addr_type)
a9b0a04c 3636{
912b42ef 3637 struct hci_conn_params *param;
a9b0a04c 3638
738f6185
JH		 3639 /* The list only contains identity addresses */
3640 if (!hci_is_identity_address(addr, addr_type))
3641 return NULL;
a9b0a04c 3642
501f8827 3643 list_for_each_entry(param, list, action) {
912b42ef
JH		 3644 if (bacmp(&param->addr, addr) == 0 &&
3645 param->addr_type == addr_type)
3646 return param;
4b10966f
MH		 3647 }
3648
3649 return NULL;
a9b0a04c
AG		 3650}
3651
15819a70 3652/* This function requires the caller holds hdev->lock */
51d167c0
MH		 3653struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3654 bdaddr_t *addr, u8 addr_type)
15819a70
AG		 3655{
3656 struct hci_conn_params *params;
3657
c46245b3 3658 if (!hci_is_identity_address(addr, addr_type))
51d167c0 3659 return NULL;
a9b0a04c 3660
15819a70 3661 params = hci_conn_params_lookup(hdev, addr, addr_type);
cef952ce 3662 if (params)
51d167c0 3663 return params;
15819a70
AG		 3664
3665 params = kzalloc(sizeof(*params), GFP_KERNEL);
3666 if (!params) {
3667 BT_ERR("Out of memory");
51d167c0 3668 return NULL;
15819a70
AG		 3669 }
3670
3671 bacpy(&params->addr, addr);
3672 params->addr_type = addr_type;
cef952ce
AG		 3673
3674 list_add(&params->list, &hdev->le_conn_params);
93450c75 3675 INIT_LIST_HEAD(&params->action);
cef952ce 3676
bf5b3c8b
MH		 3677 params->conn_min_interval = hdev->le_conn_min_interval;
3678 params->conn_max_interval = hdev->le_conn_max_interval;
3679 params->conn_latency = hdev->le_conn_latency;
3680 params->supervision_timeout = hdev->le_supv_timeout;
3681 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3682
3683 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3684
51d167c0 3685 return params;
bf5b3c8b
MH		 3686}
3687
3688/* This function requires the caller holds hdev->lock */
3689int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
d06b50ce 3690 u8 auto_connect)
15819a70
AG		 3691{
3692 struct hci_conn_params *params;
3693
8c87aae1
MH		 3694 params = hci_conn_params_add(hdev, addr, addr_type);
3695 if (!params)
3696 return -EIO;
cef952ce 3697
42ce26de
JH		 3698 if (params->auto_connect == auto_connect)
3699 return 0;
3700
95305baa 3701 list_del_init(&params->action);
15819a70 3702
cef952ce
AG		 3703 switch (auto_connect) {
3704 case HCI_AUTO_CONN_DISABLED:
3705 case HCI_AUTO_CONN_LINK_LOSS:
95305baa 3706 hci_update_background_scan(hdev);
cef952ce 3707 break;
851efca8 3708 case HCI_AUTO_CONN_REPORT:
95305baa
JH		 3709 list_add(&params->action, &hdev->pend_le_reports);
3710 hci_update_background_scan(hdev);
cef952ce 3711 break;
4b9e7e75 3712 case HCI_AUTO_CONN_DIRECT:
cef952ce 3713 case HCI_AUTO_CONN_ALWAYS:
95305baa
JH		 3714 if (!is_connected(hdev, addr, addr_type)) {
3715 list_add(&params->action, &hdev->pend_le_conns);
3716 hci_update_background_scan(hdev);
3717 }
cef952ce
AG		 3718 break;
3719 }
15819a70 3720
851efca8
JH		 3721 params->auto_connect = auto_connect;
3722
d06b50ce
MH		 3723 BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,
3724 auto_connect);
a9b0a04c
AG		 3725
3726 return 0;
15819a70
AG		 3727}
3728
f6c63249 3729static void hci_conn_params_free(struct hci_conn_params *params)
15819a70 3730{
f8aaf9b6 3731 if (params->conn) {
f161dd41 3732 hci_conn_drop(params->conn);
f8aaf9b6
JH		 3733 hci_conn_put(params->conn);
3734 }
f161dd41 3735
95305baa 3736 list_del(&params->action);
15819a70
AG		 3737 list_del(&params->list);
3738 kfree(params);
f6c63249
JH		 3739}
3740
3741/* This function requires the caller holds hdev->lock */
3742void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3743{
3744 struct hci_conn_params *params;
3745
3746 params = hci_conn_params_lookup(hdev, addr, addr_type);
3747 if (!params)
3748 return;
3749
3750 hci_conn_params_free(params);
15819a70 3751
95305baa
JH		 3752 hci_update_background_scan(hdev);
3753
15819a70
AG		 3754 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3755}
3756
3757/* This function requires the caller holds hdev->lock */
55af49a8 3758void hci_conn_params_clear_disabled(struct hci_dev *hdev)
15819a70
AG		 3759{
3760 struct hci_conn_params *params, *tmp;
3761
3762 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
55af49a8
JH		 3763 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3764 continue;
15819a70
AG		 3765 list_del(&params->list);
3766 kfree(params);
3767 }
3768
55af49a8 3769 BT_DBG("All LE disabled connection parameters were removed");
77a77a30
AG		 3770}
3771
3772/* This function requires the caller holds hdev->lock */
373110c5 3773void hci_conn_params_clear_all(struct hci_dev *hdev)
77a77a30 3774{
15819a70 3775 struct hci_conn_params *params, *tmp;
77a77a30 3776
f6c63249
JH		 3777 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3778 hci_conn_params_free(params);
77a77a30 3779
a4790dbd 3780 hci_update_background_scan(hdev);
77a77a30 3781
15819a70 3782 BT_DBG("All LE connection parameters were removed");
77a77a30
AG		 3783}
3784
4c87eaab 3785static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 3786{
4c87eaab
AG		 3787 if (status) {
3788 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 3789
4c87eaab
AG		 3790 hci_dev_lock(hdev);
3791 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3792 hci_dev_unlock(hdev);
3793 return;
3794 }
7ba8b4be
AG		 3795}
3796
4c87eaab 3797static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 3798{
4c87eaab
AG		 3799 /* General inquiry access code (GIAC) */
3800 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3801 struct hci_request req;
3802 struct hci_cp_inquiry cp;
7ba8b4be
AG		 3803 int err;
3804
4c87eaab
AG		 3805 if (status) {
3806 BT_ERR("Failed to disable LE scanning: status %d", status);
3807 return;
3808 }
7ba8b4be 3809
4c87eaab
AG		 3810 switch (hdev->discovery.type) {
3811 case DISCOV_TYPE_LE:
3812 hci_dev_lock(hdev);
3813 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3814 hci_dev_unlock(hdev);
3815 break;
7ba8b4be 3816
4c87eaab
AG		 3817 case DISCOV_TYPE_INTERLEAVED:
3818 hci_req_init(&req, hdev);
7ba8b4be 3819
4c87eaab
AG		 3820 memset(&cp, 0, sizeof(cp));
3821 memcpy(&cp.lap, lap, sizeof(cp.lap));
3822 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
3823 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 3824
4c87eaab 3825 hci_dev_lock(hdev);
7dbfac1d 3826
4c87eaab 3827 hci_inquiry_cache_flush(hdev);
7dbfac1d 3828
4c87eaab
AG		 3829 err = hci_req_run(&req, inquiry_complete);
3830 if (err) {
3831 BT_ERR("Inquiry request failed: err %d", err);
3832 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3833 }
7dbfac1d 3834
4c87eaab
AG		 3835 hci_dev_unlock(hdev);
3836 break;
7dbfac1d 3837 }
7dbfac1d
AG		 3838}
3839
7ba8b4be
AG		 3840static void le_scan_disable_work(struct work_struct *work)
3841{
3842 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 3843 le_scan_disable.work);
4c87eaab
AG		 3844 struct hci_request req;
3845 int err;
7ba8b4be
AG		 3846
3847 BT_DBG("%s", hdev->name);
3848
4c87eaab 3849 hci_req_init(&req, hdev);
28b75a89 3850
b1efcc28 3851 hci_req_add_le_scan_disable(&req);
28b75a89 3852
4c87eaab
AG		 3853 err = hci_req_run(&req, le_scan_disable_work_complete);
3854 if (err)
3855 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 3856}
3857
8d97250e
JH		 3858static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
3859{
3860 struct hci_dev *hdev = req->hdev;
3861
3862 /* If we're advertising or initiating an LE connection we can't
3863 * go ahead and change the random address at this time. This is
3864 * because the eventual initiator address used for the
3865 * subsequently created connection will be undefined (some
3866 * controllers use the new address and others the one we had
3867 * when the operation started).
3868 *
3869 * In this kind of scenario skip the update and let the random
3870 * address be updated at the next cycle.
3871 */
5ce194c4 3872 if (test_bit(HCI_LE_ADV, &hdev->dev_flags) ||
8d97250e
JH		 3873 hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT)) {
3874 BT_DBG("Deferring random address update");
9a783a13 3875 set_bit(HCI_RPA_EXPIRED, &hdev->dev_flags);
8d97250e
JH		 3876 return;
3877 }
3878
3879 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa);
3880}
3881
94b1fc92
MH		 3882int hci_update_random_address(struct hci_request *req, bool require_privacy,
3883 u8 *own_addr_type)
ebd3a747
JH		 3884{
3885 struct hci_dev *hdev = req->hdev;
3886 int err;
3887
3888 /* If privacy is enabled use a resolvable private address. If
2b5224dc
MH		 3889 * current RPA has expired or there is something else than
3890 * the current RPA in use, then generate a new one.
ebd3a747
JH		 3891 */
3892 if (test_bit(HCI_PRIVACY, &hdev->dev_flags)) {
ebd3a747
JH		 3893 int to;
3894
3895 *own_addr_type = ADDR_LE_DEV_RANDOM;
3896
3897 if (!test_and_clear_bit(HCI_RPA_EXPIRED, &hdev->dev_flags) &&
2b5224dc 3898 !bacmp(&hdev->random_addr, &hdev->rpa))
ebd3a747
JH		 3899 return 0;
3900
defce9e8 3901 err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
ebd3a747
JH		 3902 if (err < 0) {
3903 BT_ERR("%s failed to generate new RPA", hdev->name);
3904 return err;
3905 }
3906
8d97250e 3907 set_random_addr(req, &hdev->rpa);
ebd3a747
JH		 3908
3909 to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
3910 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);
3911
3912 return 0;
94b1fc92
MH		 3913 }
3914
3915 /* In case of required privacy without resolvable private address,
3916 * use an unresolvable private address. This is useful for active
3917 * scanning and non-connectable advertising.
3918 */
3919 if (require_privacy) {
3920 bdaddr_t urpa;
3921
3922 get_random_bytes(&urpa, 6);
3923 urpa.b[5] &= 0x3f; /* Clear two most significant bits */
3924
3925 *own_addr_type = ADDR_LE_DEV_RANDOM;
8d97250e 3926 set_random_addr(req, &urpa);
94b1fc92 3927 return 0;
ebd3a747
JH		 3928 }
3929
3930 /* If forcing static address is in use or there is no public
3931 * address use the static address as random address (but skip
3932 * the HCI command if the current random address is already the
3933 * static one.
3934 */
111902f7 3935 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags) ||
ebd3a747
JH		 3936 !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
3937 *own_addr_type = ADDR_LE_DEV_RANDOM;
3938 if (bacmp(&hdev->static_addr, &hdev->random_addr))
3939 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
3940 &hdev->static_addr);
3941 return 0;
3942 }
3943
3944 /* Neither privacy nor static address is being used so use a
3945 * public address.
3946 */
3947 *own_addr_type = ADDR_LE_DEV_PUBLIC;
3948
3949 return 0;
3950}
3951
a1f4c318
JH		 3952/* Copy the Identity Address of the controller.
3953 *
3954 * If the controller has a public BD_ADDR, then by default use that one.
3955 * If this is a LE only controller without a public address, default to
3956 * the static random address.
3957 *
3958 * For debugging purposes it is possible to force controllers with a
3959 * public address to use the static random address instead.
3960 */
3961void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3962 u8 *bdaddr_type)
3963{
111902f7 3964 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags) ||
a1f4c318
JH		 3965 !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
3966 bacpy(bdaddr, &hdev->static_addr);
3967 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3968 } else {
3969 bacpy(bdaddr, &hdev->bdaddr);
3970 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3971 }
3972}
3973
9be0dab7
DH		 3974/* Alloc HCI device */
3975struct hci_dev *hci_alloc_dev(void)
3976{
3977 struct hci_dev *hdev;
3978
27f70f3e 3979 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
9be0dab7
DH		 3980 if (!hdev)
3981 return NULL;
3982
b1b813d4
DH		 3983 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3984 hdev->esco_type = (ESCO_HV1);
3985 hdev->link_mode = (HCI_LM_ACCEPT);
b4cb9fb2
MH		 3986 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3987 hdev->io_capability = 0x03; /* No Input No Output */
96c2103a 3988 hdev->manufacturer = 0xffff; /* Default to internal use */
bbaf444a
JH		 3989 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3990 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 3991
b1b813d4
DH		 3992 hdev->sniff_max_interval = 800;
3993 hdev->sniff_min_interval = 80;
3994
3f959d46 3995 hdev->le_adv_channel_map = 0x07;
628531c9
GL		 3996 hdev->le_adv_min_interval = 0x0800;
3997 hdev->le_adv_max_interval = 0x0800;
bef64738
MH		 3998 hdev->le_scan_interval = 0x0060;
3999 hdev->le_scan_window = 0x0030;
4e70c7e7
MH		 4000 hdev->le_conn_min_interval = 0x0028;
4001 hdev->le_conn_max_interval = 0x0038;
04fb7d90
MH		 4002 hdev->le_conn_latency = 0x0000;
4003 hdev->le_supv_timeout = 0x002a;
bef64738 4004
d6bfd59c 4005 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
b9a7a61e 4006 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
31ad1691
AK		 4007 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
4008 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
d6bfd59c 4009
b1b813d4
DH		 4010 mutex_init(&hdev->lock);
4011 mutex_init(&hdev->req_lock);
4012
4013 INIT_LIST_HEAD(&hdev->mgmt_pending);
4014 INIT_LIST_HEAD(&hdev->blacklist);
6659358e 4015 INIT_LIST_HEAD(&hdev->whitelist);
b1b813d4
DH		 4016 INIT_LIST_HEAD(&hdev->uuids);
4017 INIT_LIST_HEAD(&hdev->link_keys);
4018 INIT_LIST_HEAD(&hdev->long_term_keys);
970c4e46 4019 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
b1b813d4 4020 INIT_LIST_HEAD(&hdev->remote_oob_data);
d2ab0ac1 4021 INIT_LIST_HEAD(&hdev->le_white_list);
15819a70 4022 INIT_LIST_HEAD(&hdev->le_conn_params);
77a77a30 4023 INIT_LIST_HEAD(&hdev->pend_le_conns);
66f8455a 4024 INIT_LIST_HEAD(&hdev->pend_le_reports);
6b536b5e 4025 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 4026
4027 INIT_WORK(&hdev->rx_work, hci_rx_work);
4028 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
4029 INIT_WORK(&hdev->tx_work, hci_tx_work);
4030 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 4031
b1b813d4
DH		 4032 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
4033 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
4034 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
4035
b1b813d4
DH		 4036 skb_queue_head_init(&hdev->rx_q);
4037 skb_queue_head_init(&hdev->cmd_q);
4038 skb_queue_head_init(&hdev->raw_q);
4039
4040 init_waitqueue_head(&hdev->req_wait_q);
4041
65cc2b49 4042 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
b1b813d4 4043
b1b813d4
DH		 4044 hci_init_sysfs(hdev);
4045 discovery_init(hdev);
9be0dab7
DH		 4046
4047 return hdev;
4048}
4049EXPORT_SYMBOL(hci_alloc_dev);
4050
4051/* Free HCI device */
4052void hci_free_dev(struct hci_dev *hdev)
4053{
9be0dab7
DH		 4054 /* will free via device release */
4055 put_device(&hdev->dev);
4056}
4057EXPORT_SYMBOL(hci_free_dev);
4058
1da177e4
LT		 4059/* Register HCI device */
4060int hci_register_dev(struct hci_dev *hdev)
4061{
b1b813d4 4062 int id, error;
1da177e4 4063
74292d5a 4064 if (!hdev->open || !hdev->close || !hdev->send)
1da177e4
LT		 4065 return -EINVAL;
4066
08add513
MM		 4067 /* Do not allow HCI_AMP devices to register at index 0,
4068 * so the index can be used as the AMP controller ID.
4069 */
3df92b31
SL		 4070 switch (hdev->dev_type) {
4071 case HCI_BREDR:
4072 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
4073 break;
4074 case HCI_AMP:
4075 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
4076 break;
4077 default:
4078 return -EINVAL;
1da177e4 4079 }
8e87d142 4080
3df92b31
SL		 4081 if (id < 0)
4082 return id;
4083
1da177e4
LT		 4084 sprintf(hdev->name, "hci%d", id);
4085 hdev->id = id;
2d8b3a11
AE		 4086
4087 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
4088
d8537548
KC		 4089 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
4090 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 4091 if (!hdev->workqueue) {
4092 error = -ENOMEM;
4093 goto err;
4094 }
f48fd9c8 4095
d8537548
KC		 4096 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
4097 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 4098 if (!hdev->req_workqueue) {
4099 destroy_workqueue(hdev->workqueue);
4100 error = -ENOMEM;
4101 goto err;
4102 }
4103
0153e2ec
MH		 4104 if (!IS_ERR_OR_NULL(bt_debugfs))
4105 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
4106
bdc3e0f1
MH		 4107 dev_set_name(&hdev->dev, "%s", hdev->name);
4108
4109 error = device_add(&hdev->dev);
33ca954d 4110 if (error < 0)
54506918 4111 goto err_wqueue;
1da177e4 4112
611b30f7 4113 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 4114 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
4115 hdev);
611b30f7
MH		 4116 if (hdev->rfkill) {
4117 if (rfkill_register(hdev->rfkill) < 0) {
4118 rfkill_destroy(hdev->rfkill);
4119 hdev->rfkill = NULL;
4120 }
4121 }
4122
5e130367
JH		 4123 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
4124 set_bit(HCI_RFKILLED, &hdev->dev_flags);
4125
a8b2d5c2 4126 set_bit(HCI_SETUP, &hdev->dev_flags);
004b0258 4127 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ce2be9ac 4128
01cd3404 4129 if (hdev->dev_type == HCI_BREDR) {
56f87901
JH		 4130 /* Assume BR/EDR support until proven otherwise (such as
4131 * through reading supported features during init.
4132 */
4133 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
4134 }
ce2be9ac 4135
fcee3377
GP		 4136 write_lock(&hci_dev_list_lock);
4137 list_add(&hdev->list, &hci_dev_list);
4138 write_unlock(&hci_dev_list_lock);
4139
4a964404
MH		 4140 /* Devices that are marked for raw-only usage are unconfigured
4141 * and should not be included in normal operation.
fee746b0
MH		 4142 */
4143 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
4a964404 4144 set_bit(HCI_UNCONFIGURED, &hdev->dev_flags);
fee746b0 4145
1da177e4 4146 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 4147 hci_dev_hold(hdev);
1da177e4 4148
19202573 4149 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 4150
1da177e4 4151 return id;
f48fd9c8 4152
33ca954d
DH		 4153err_wqueue:
4154 destroy_workqueue(hdev->workqueue);
6ead1bbc 4155 destroy_workqueue(hdev->req_workqueue);
33ca954d 4156err:
3df92b31 4157 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 4158
33ca954d 4159 return error;
1da177e4
LT		 4160}
4161EXPORT_SYMBOL(hci_register_dev);
4162
4163/* Unregister HCI device */
59735631 4164void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 4165{
3df92b31 4166 int i, id;
ef222013 4167
c13854ce 4168 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 4169
94324962
JH		 4170 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
4171
3df92b31
SL		 4172 id = hdev->id;
4173
f20d09d5 4174 write_lock(&hci_dev_list_lock);
1da177e4 4175 list_del(&hdev->list);
f20d09d5 4176 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 4177
4178 hci_dev_do_close(hdev);
4179
cd4c5391 4180 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 4181 kfree_skb(hdev->reassembly[i]);
4182
b9b5ef18
GP		 4183 cancel_work_sync(&hdev->power_on);
4184
ab81cbf9 4185 if (!test_bit(HCI_INIT, &hdev->flags) &&
d603b76b
MH		 4186 !test_bit(HCI_SETUP, &hdev->dev_flags) &&
4187 !test_bit(HCI_CONFIG, &hdev->dev_flags)) {
09fd0de5 4188 hci_dev_lock(hdev);
744cf19e 4189 mgmt_index_removed(hdev);
09fd0de5 4190 hci_dev_unlock(hdev);
56e5cb86 4191 }
ab81cbf9 4192
2e58ef3e
JH		 4193 /* mgmt_index_removed should take care of emptying the
4194 * pending list */
4195 BUG_ON(!list_empty(&hdev->mgmt_pending));
4196
1da177e4
LT		 4197 hci_notify(hdev, HCI_DEV_UNREG);
4198
611b30f7
MH		 4199 if (hdev->rfkill) {
4200 rfkill_unregister(hdev->rfkill);
4201 rfkill_destroy(hdev->rfkill);
4202 }
4203
711eafe3 4204 smp_unregister(hdev);
99780a7b 4205
bdc3e0f1 4206 device_del(&hdev->dev);
147e2d59 4207
0153e2ec
MH		 4208 debugfs_remove_recursive(hdev->debugfs);
4209
f48fd9c8 4210 destroy_workqueue(hdev->workqueue);
6ead1bbc 4211 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 4212
09fd0de5 4213 hci_dev_lock(hdev);
dcc36c16 4214 hci_bdaddr_list_clear(&hdev->blacklist);
6659358e 4215 hci_bdaddr_list_clear(&hdev->whitelist);
2aeb9a1a 4216 hci_uuids_clear(hdev);
55ed8ca1 4217 hci_link_keys_clear(hdev);
b899efaf 4218 hci_smp_ltks_clear(hdev);
970c4e46 4219 hci_smp_irks_clear(hdev);
2763eda6 4220 hci_remote_oob_data_clear(hdev);
dcc36c16 4221 hci_bdaddr_list_clear(&hdev->le_white_list);
373110c5 4222 hci_conn_params_clear_all(hdev);
09fd0de5 4223 hci_dev_unlock(hdev);
e2e0cacb 4224
dc946bd8 4225 hci_dev_put(hdev);
3df92b31
SL		 4226
4227 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 4228}
4229EXPORT_SYMBOL(hci_unregister_dev);
4230
4231/* Suspend HCI device */
4232int hci_suspend_dev(struct hci_dev *hdev)
4233{
4234 hci_notify(hdev, HCI_DEV_SUSPEND);
4235 return 0;
4236}
4237EXPORT_SYMBOL(hci_suspend_dev);
4238
4239/* Resume HCI device */
4240int hci_resume_dev(struct hci_dev *hdev)
4241{
4242 hci_notify(hdev, HCI_DEV_RESUME);
4243 return 0;
4244}
4245EXPORT_SYMBOL(hci_resume_dev);
4246
76bca880 4247/* Receive frame from HCI drivers */
e1a26170 4248int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 4249{
76bca880 4250 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 4251 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 4252 kfree_skb(skb);
4253 return -ENXIO;
4254 }
4255
d82603c6 4256 /* Incoming skb */
76bca880
MH		 4257 bt_cb(skb)->incoming = 1;
4258
4259 /* Time stamp */
4260 __net_timestamp(skb);
4261
76bca880 4262 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 4263 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 4264
76bca880
MH		 4265 return 0;
4266}
4267EXPORT_SYMBOL(hci_recv_frame);
4268
33e882a5 4269static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 4270 int count, __u8 index)
33e882a5
SS		 4271{
4272 int len = 0;
4273 int hlen = 0;
4274 int remain = count;
4275 struct sk_buff *skb;
4276 struct bt_skb_cb *scb;
4277
4278 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 4279 index >= NUM_REASSEMBLY)
33e882a5
SS		 4280 return -EILSEQ;
4281
4282 skb = hdev->reassembly[index];
4283
4284 if (!skb) {
4285 switch (type) {
4286 case HCI_ACLDATA_PKT:
4287 len = HCI_MAX_FRAME_SIZE;
4288 hlen = HCI_ACL_HDR_SIZE;
4289 break;
4290 case HCI_EVENT_PKT:
4291 len = HCI_MAX_EVENT_SIZE;
4292 hlen = HCI_EVENT_HDR_SIZE;
4293 break;
4294 case HCI_SCODATA_PKT:
4295 len = HCI_MAX_SCO_SIZE;
4296 hlen = HCI_SCO_HDR_SIZE;
4297 break;
4298 }
4299
1e429f38 4300 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 4301 if (!skb)
4302 return -ENOMEM;
4303
4304 scb = (void *) skb->cb;
4305 scb->expect = hlen;
4306 scb->pkt_type = type;
4307
33e882a5
SS		 4308 hdev->reassembly[index] = skb;
4309 }
4310
4311 while (count) {
4312 scb = (void *) skb->cb;
89bb46d0 4313 len = min_t(uint, scb->expect, count);
33e882a5
SS		 4314
4315 memcpy(skb_put(skb, len), data, len);
4316
4317 count -= len;
4318 data += len;
4319 scb->expect -= len;
4320 remain = count;
4321
4322 switch (type) {
4323 case HCI_EVENT_PKT:
4324 if (skb->len == HCI_EVENT_HDR_SIZE) {
4325 struct hci_event_hdr *h = hci_event_hdr(skb);
4326 scb->expect = h->plen;
4327
4328 if (skb_tailroom(skb) < scb->expect) {
4329 kfree_skb(skb);
4330 hdev->reassembly[index] = NULL;
4331 return -ENOMEM;
4332 }
4333 }
4334 break;
4335
4336 case HCI_ACLDATA_PKT:
4337 if (skb->len == HCI_ACL_HDR_SIZE) {
4338 struct hci_acl_hdr *h = hci_acl_hdr(skb);
4339 scb->expect = __le16_to_cpu(h->dlen);
4340
4341 if (skb_tailroom(skb) < scb->expect) {
4342 kfree_skb(skb);
4343 hdev->reassembly[index] = NULL;
4344 return -ENOMEM;
4345 }
4346 }
4347 break;
4348
4349 case HCI_SCODATA_PKT:
4350 if (skb->len == HCI_SCO_HDR_SIZE) {
4351 struct hci_sco_hdr *h = hci_sco_hdr(skb);
4352 scb->expect = h->dlen;
4353
4354 if (skb_tailroom(skb) < scb->expect) {
4355 kfree_skb(skb);
4356 hdev->reassembly[index] = NULL;
4357 return -ENOMEM;
4358 }
4359 }
4360 break;
4361 }
4362
4363 if (scb->expect == 0) {
4364 /* Complete frame */
4365
4366 bt_cb(skb)->pkt_type = type;
e1a26170 4367 hci_recv_frame(hdev, skb);
33e882a5
SS		 4368
4369 hdev->reassembly[index] = NULL;
4370 return remain;
4371 }
4372 }
4373
4374 return remain;
4375}
4376
99811510
SS		 4377#define STREAM_REASSEMBLY 0
4378
4379int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
4380{
4381 int type;
4382 int rem = 0;
4383
da5f6c37 4384 while (count) {
99811510
SS		 4385 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
4386
4387 if (!skb) {
4388 struct { char type; } *pkt;
4389
4390 /* Start of the frame */
4391 pkt = data;
4392 type = pkt->type;
4393
4394 data++;
4395 count--;
4396 } else
4397 type = bt_cb(skb)->pkt_type;
4398
1e429f38 4399 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 4400 STREAM_REASSEMBLY);
99811510
SS		 4401 if (rem < 0)
4402 return rem;
4403
4404 data += (count - rem);
4405 count = rem;
f81c6224 4406 }
99811510
SS		 4407
4408 return rem;
4409}
4410EXPORT_SYMBOL(hci_recv_stream_fragment);
4411
1da177e4
LT		 4412/* ---- Interface to upper protocols ---- */
4413
1da177e4
LT		 4414int hci_register_cb(struct hci_cb *cb)
4415{
4416 BT_DBG("%p name %s", cb, cb->name);
4417
f20d09d5 4418 write_lock(&hci_cb_list_lock);
1da177e4 4419 list_add(&cb->list, &hci_cb_list);
f20d09d5 4420 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 4421
4422 return 0;
4423}
4424EXPORT_SYMBOL(hci_register_cb);
4425
4426int hci_unregister_cb(struct hci_cb *cb)
4427{
4428 BT_DBG("%p name %s", cb, cb->name);
4429
f20d09d5 4430 write_lock(&hci_cb_list_lock);
1da177e4 4431 list_del(&cb->list);
f20d09d5 4432 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 4433
4434 return 0;
4435}
4436EXPORT_SYMBOL(hci_unregister_cb);
4437
51086991 4438static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 4439{
cdc52faa
MH		 4440 int err;
4441
0d48d939 4442 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 4443
cd82e61c
MH		 4444 /* Time stamp */
4445 __net_timestamp(skb);
1da177e4 4446
cd82e61c
MH		 4447 /* Send copy to monitor */
4448 hci_send_to_monitor(hdev, skb);
4449
4450 if (atomic_read(&hdev->promisc)) {
4451 /* Send copy to the sockets */
470fe1b5 4452 hci_send_to_sock(hdev, skb);
1da177e4
LT		 4453 }
4454
4455 /* Get rid of skb owner, prior to sending to the driver. */
4456 skb_orphan(skb);
4457
cdc52faa
MH		 4458 err = hdev->send(hdev, skb);
4459 if (err < 0) {
4460 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
4461 kfree_skb(skb);
4462 }
1da177e4
LT		 4463}
4464
3119ae95
JH		 4465void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
4466{
4467 skb_queue_head_init(&req->cmd_q);
4468 req->hdev = hdev;
5d73e034 4469 req->err = 0;
3119ae95
JH		 4470}
4471
4472int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
4473{
4474 struct hci_dev *hdev = req->hdev;
4475 struct sk_buff *skb;
4476 unsigned long flags;
4477
4478 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
4479
49c922bb 4480 /* If an error occurred during request building, remove all HCI
5d73e034
AG		 4481 * commands queued on the HCI request queue.
4482 */
4483 if (req->err) {
4484 skb_queue_purge(&req->cmd_q);
4485 return req->err;
4486 }
4487
3119ae95
JH		 4488 /* Do not allow empty requests */
4489 if (skb_queue_empty(&req->cmd_q))
382b0c39 4490 return -ENODATA;
3119ae95
JH		 4491
4492 skb = skb_peek_tail(&req->cmd_q);
4493 bt_cb(skb)->req.complete = complete;
4494
4495 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4496 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
4497 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4498
4499 queue_work(hdev->workqueue, &hdev->cmd_work);
4500
4501 return 0;
4502}
4503
899de765
MH		 4504bool hci_req_pending(struct hci_dev *hdev)
4505{
4506 return (hdev->req_status == HCI_REQ_PEND);
4507}
4508
1ca3a9d0 4509static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 4510 u32 plen, const void *param)
1da177e4
LT		 4511{
4512 int len = HCI_COMMAND_HDR_SIZE + plen;
4513 struct hci_command_hdr *hdr;
4514 struct sk_buff *skb;
4515
1da177e4 4516 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 4517 if (!skb)
4518 return NULL;
1da177e4
LT		 4519
4520 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 4521 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 4522 hdr->plen = plen;
4523
4524 if (plen)
4525 memcpy(skb_put(skb, plen), param, plen);
4526
4527 BT_DBG("skb len %d", skb->len);
4528
0d48d939 4529 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
43e73e4e 4530 bt_cb(skb)->opcode = opcode;
c78ae283 4531
1ca3a9d0
JH		 4532 return skb;
4533}
4534
4535/* Send HCI command */
07dc93dd
JH		 4536int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
4537 const void *param)
1ca3a9d0
JH		 4538{
4539 struct sk_buff *skb;
4540
4541 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4542
4543 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4544 if (!skb) {
4545 BT_ERR("%s no memory for command", hdev->name);
4546 return -ENOMEM;
4547 }
4548
49c922bb 4549 /* Stand-alone HCI commands must be flagged as
11714b3d
JH		 4550 * single-command requests.
4551 */
4552 bt_cb(skb)->req.start = true;
4553
1da177e4 4554 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 4555 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 4556
4557 return 0;
4558}
1da177e4 4559
71c76a17 4560/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 4561void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
4562 const void *param, u8 event)
71c76a17
JH		 4563{
4564 struct hci_dev *hdev = req->hdev;
4565 struct sk_buff *skb;
4566
4567 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4568
49c922bb 4569 /* If an error occurred during request building, there is no point in
34739c1e
AG		 4570 * queueing the HCI command. We can simply return.
4571 */
4572 if (req->err)
4573 return;
4574
71c76a17
JH		 4575 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4576 if (!skb) {
5d73e034
AG		 4577 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
4578 hdev->name, opcode);
4579 req->err = -ENOMEM;
e348fe6b 4580 return;
71c76a17
JH		 4581 }
4582
4583 if (skb_queue_empty(&req->cmd_q))
4584 bt_cb(skb)->req.start = true;
4585
02350a72
JH		 4586 bt_cb(skb)->req.event = event;
4587
71c76a17 4588 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 4589}
4590
07dc93dd
JH		 4591void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
4592 const void *param)
02350a72
JH		 4593{
4594 hci_req_add_ev(req, opcode, plen, param, 0);
4595}
4596
1da177e4 4597/* Get data from the previously sent command */
a9de9248 4598void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 4599{
4600 struct hci_command_hdr *hdr;
4601
4602 if (!hdev->sent_cmd)
4603 return NULL;
4604
4605 hdr = (void *) hdev->sent_cmd->data;
4606
a9de9248 4607 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 4608 return NULL;
4609
f0e09510 4610 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 4611
4612 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
4613}
4614
4615/* Send ACL data */
4616static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
4617{
4618 struct hci_acl_hdr *hdr;
4619 int len = skb->len;
4620
badff6d0
ACM		 4621 skb_push(skb, HCI_ACL_HDR_SIZE);
4622 skb_reset_transport_header(skb);
9c70220b 4623 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 4624 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
4625 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 4626}
4627
ee22be7e 4628static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 4629 struct sk_buff *skb, __u16 flags)
1da177e4 4630{
ee22be7e 4631 struct hci_conn *conn = chan->conn;
1da177e4
LT		 4632 struct hci_dev *hdev = conn->hdev;
4633 struct sk_buff *list;
4634
087bfd99
GP		 4635 skb->len = skb_headlen(skb);
4636 skb->data_len = 0;
4637
4638 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 4639
4640 switch (hdev->dev_type) {
4641 case HCI_BREDR:
4642 hci_add_acl_hdr(skb, conn->handle, flags);
4643 break;
4644 case HCI_AMP:
4645 hci_add_acl_hdr(skb, chan->handle, flags);
4646 break;
4647 default:
4648 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
4649 return;
4650 }
087bfd99 4651
70f23020
AE		 4652 list = skb_shinfo(skb)->frag_list;
4653 if (!list) {
1da177e4
LT		 4654 /* Non fragmented */
4655 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
4656
73d80deb 4657 skb_queue_tail(queue, skb);
1da177e4
LT		 4658 } else {
4659 /* Fragmented */
4660 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4661
4662 skb_shinfo(skb)->frag_list = NULL;
4663
4664 /* Queue all fragments atomically */
af3e6359 4665 spin_lock(&queue->lock);
1da177e4 4666
73d80deb 4667 __skb_queue_tail(queue, skb);
e702112f
AE		 4668
4669 flags &= ~ACL_START;
4670 flags |= ACL_CONT;
1da177e4
LT		 4671 do {
4672 skb = list; list = list->next;
8e87d142 4673
0d48d939 4674 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 4675 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 4676
4677 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4678
73d80deb 4679 __skb_queue_tail(queue, skb);
1da177e4
LT		 4680 } while (list);
4681
af3e6359 4682 spin_unlock(&queue->lock);
1da177e4 4683 }
73d80deb
LAD		 4684}
4685
4686void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
4687{
ee22be7e 4688 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 4689
f0e09510 4690 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 4691
ee22be7e 4692 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 4693
3eff45ea 4694 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 4695}
1da177e4
LT		 4696
4697/* Send SCO data */
0d861d8b 4698void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 4699{
4700 struct hci_dev *hdev = conn->hdev;
4701 struct hci_sco_hdr hdr;
4702
4703 BT_DBG("%s len %d", hdev->name, skb->len);
4704
aca3192c 4705 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 4706 hdr.dlen = skb->len;
4707
badff6d0
ACM		 4708 skb_push(skb, HCI_SCO_HDR_SIZE);
4709 skb_reset_transport_header(skb);
9c70220b 4710 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 4711
0d48d939 4712 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 4713
1da177e4 4714 skb_queue_tail(&conn->data_q, skb);
3eff45ea 4715 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 4716}
1da177e4
LT		 4717
4718/* ---- HCI TX task (outgoing data) ---- */
4719
4720/* HCI Connection scheduler */
6039aa73
GP		 4721static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4722 int *quote)
1da177e4
LT		 4723{
4724 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 4725 struct hci_conn *conn = NULL, *c;
abc5de8f 4726 unsigned int num = 0, min = ~0;
1da177e4 4727
8e87d142 4728 /* We don't have to lock device here. Connections are always
1da177e4 4729 * added and removed with TX task disabled. */
bf4c6325
GP		 4730
4731 rcu_read_lock();
4732
4733 list_for_each_entry_rcu(c, &h->list, list) {
769be974 4734 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 4735 continue;
769be974
MH		 4736
4737 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4738 continue;
4739
1da177e4
LT		 4740 num++;
4741
4742 if (c->sent < min) {
4743 min = c->sent;
4744 conn = c;
4745 }
52087a79
LAD		 4746
4747 if (hci_conn_num(hdev, type) == num)
4748 break;
1da177e4
LT		 4749 }
4750
bf4c6325
GP		 4751 rcu_read_unlock();
4752
1da177e4 4753 if (conn) {
6ed58ec5
VT		 4754 int cnt, q;
4755
4756 switch (conn->type) {
4757 case ACL_LINK:
4758 cnt = hdev->acl_cnt;
4759 break;
4760 case SCO_LINK:
4761 case ESCO_LINK:
4762 cnt = hdev->sco_cnt;
4763 break;
4764 case LE_LINK:
4765 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4766 break;
4767 default:
4768 cnt = 0;
4769 BT_ERR("Unknown link type");
4770 }
4771
4772 q = cnt / num;
1da177e4
LT		 4773 *quote = q ? q : 1;
4774 } else
4775 *quote = 0;
4776
4777 BT_DBG("conn %p quote %d", conn, *quote);
4778 return conn;
4779}
4780
6039aa73 4781static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 4782{
4783 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 4784 struct hci_conn *c;
1da177e4 4785
bae1f5d9 4786 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 4787
bf4c6325
GP		 4788 rcu_read_lock();
4789
1da177e4 4790 /* Kill stalled connections */
bf4c6325 4791 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 4792 if (c->type == type && c->sent) {
6ed93dc6
AE		 4793 BT_ERR("%s killing stalled connection %pMR",
4794 hdev->name, &c->dst);
bed71748 4795 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 4796 }
4797 }
bf4c6325
GP		 4798
4799 rcu_read_unlock();
1da177e4
LT		 4800}
4801
6039aa73
GP		 4802static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4803 int *quote)
1da177e4 4804{
73d80deb
LAD		 4805 struct hci_conn_hash *h = &hdev->conn_hash;
4806 struct hci_chan *chan = NULL;
abc5de8f 4807 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 4808 struct hci_conn *conn;
73d80deb
LAD		 4809 int cnt, q, conn_num = 0;
4810
4811 BT_DBG("%s", hdev->name);
4812
bf4c6325
GP		 4813 rcu_read_lock();
4814
4815 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 4816 struct hci_chan *tmp;
4817
4818 if (conn->type != type)
4819 continue;
4820
4821 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4822 continue;
4823
4824 conn_num++;
4825
8192edef 4826 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 4827 struct sk_buff *skb;
4828
4829 if (skb_queue_empty(&tmp->data_q))
4830 continue;
4831
4832 skb = skb_peek(&tmp->data_q);
4833 if (skb->priority < cur_prio)
4834 continue;
4835
4836 if (skb->priority > cur_prio) {
4837 num = 0;
4838 min = ~0;
4839 cur_prio = skb->priority;
4840 }
4841
4842 num++;
4843
4844 if (conn->sent < min) {
4845 min = conn->sent;
4846 chan = tmp;
4847 }
4848 }
4849
4850 if (hci_conn_num(hdev, type) == conn_num)
4851 break;
4852 }
4853
bf4c6325
GP		 4854 rcu_read_unlock();
4855
73d80deb
LAD		 4856 if (!chan)
4857 return NULL;
4858
4859 switch (chan->conn->type) {
4860 case ACL_LINK:
4861 cnt = hdev->acl_cnt;
4862 break;
bd1eb66b
AE		 4863 case AMP_LINK:
4864 cnt = hdev->block_cnt;
4865 break;
73d80deb
LAD		 4866 case SCO_LINK:
4867 case ESCO_LINK:
4868 cnt = hdev->sco_cnt;
4869 break;
4870 case LE_LINK:
4871 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4872 break;
4873 default:
4874 cnt = 0;
4875 BT_ERR("Unknown link type");
4876 }
4877
4878 q = cnt / num;
4879 *quote = q ? q : 1;
4880 BT_DBG("chan %p quote %d", chan, *quote);
4881 return chan;
4882}
4883
02b20f0b
LAD		 4884static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4885{
4886 struct hci_conn_hash *h = &hdev->conn_hash;
4887 struct hci_conn *conn;
4888 int num = 0;
4889
4890 BT_DBG("%s", hdev->name);
4891
bf4c6325
GP		 4892 rcu_read_lock();
4893
4894 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 4895 struct hci_chan *chan;
4896
4897 if (conn->type != type)
4898 continue;
4899
4900 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4901 continue;
4902
4903 num++;
4904
8192edef 4905 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 4906 struct sk_buff *skb;
4907
4908 if (chan->sent) {
4909 chan->sent = 0;
4910 continue;
4911 }
4912
4913 if (skb_queue_empty(&chan->data_q))
4914 continue;
4915
4916 skb = skb_peek(&chan->data_q);
4917 if (skb->priority >= HCI_PRIO_MAX - 1)
4918 continue;
4919
4920 skb->priority = HCI_PRIO_MAX - 1;
4921
4922 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 4923 skb->priority);
02b20f0b
LAD		 4924 }
4925
4926 if (hci_conn_num(hdev, type) == num)
4927 break;
4928 }
bf4c6325
GP		 4929
4930 rcu_read_unlock();
4931
02b20f0b
LAD		 4932}
4933
b71d385a
AE		 4934static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4935{
4936 /* Calculate count of blocks used by this packet */
4937 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4938}
4939
6039aa73 4940static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 4941{
4a964404 4942 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
1da177e4
LT		 4943 /* ACL tx timeout must be longer than maximum
4944 * link supervision timeout (40.9 seconds) */
63d2bc1b 4945 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 4946 HCI_ACL_TX_TIMEOUT))
bae1f5d9 4947 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 4948 }
63d2bc1b 4949}
1da177e4 4950
6039aa73 4951static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 4952{
4953 unsigned int cnt = hdev->acl_cnt;
4954 struct hci_chan *chan;
4955 struct sk_buff *skb;
4956 int quote;
4957
4958 __check_timeout(hdev, cnt);
04837f64 4959
73d80deb 4960 while (hdev->acl_cnt &&
a8c5fb1a 4961 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 4962 u32 priority = (skb_peek(&chan->data_q))->priority;
4963 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 4964 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 4965 skb->len, skb->priority);
73d80deb 4966
ec1cce24
LAD		 4967 /* Stop if priority has changed */
4968 if (skb->priority < priority)
4969 break;
4970
4971 skb = skb_dequeue(&chan->data_q);
4972
73d80deb 4973 hci_conn_enter_active_mode(chan->conn,
04124681 4974 bt_cb(skb)->force_active);
04837f64 4975
57d17d70 4976 hci_send_frame(hdev, skb);
1da177e4
LT		 4977 hdev->acl_last_tx = jiffies;
4978
4979 hdev->acl_cnt--;
73d80deb
LAD		 4980 chan->sent++;
4981 chan->conn->sent++;
1da177e4
LT		 4982 }
4983 }
02b20f0b
LAD		 4984
4985 if (cnt != hdev->acl_cnt)
4986 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 4987}
4988
6039aa73 4989static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 4990{
63d2bc1b 4991 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 4992 struct hci_chan *chan;
4993 struct sk_buff *skb;
4994 int quote;
bd1eb66b 4995 u8 type;
b71d385a 4996
63d2bc1b 4997 __check_timeout(hdev, cnt);
b71d385a 4998
bd1eb66b
AE		 4999 BT_DBG("%s", hdev->name);
5000
5001 if (hdev->dev_type == HCI_AMP)
5002 type = AMP_LINK;
5003 else
5004 type = ACL_LINK;
5005
b71d385a 5006 while (hdev->block_cnt > 0 &&
bd1eb66b 5007 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 5008 u32 priority = (skb_peek(&chan->data_q))->priority;
5009 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
5010 int blocks;
5011
5012 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 5013 skb->len, skb->priority);
b71d385a
AE		 5014
5015 /* Stop if priority has changed */
5016 if (skb->priority < priority)
5017 break;
5018
5019 skb = skb_dequeue(&chan->data_q);
5020
5021 blocks = __get_blocks(hdev, skb);
5022 if (blocks > hdev->block_cnt)
5023 return;
5024
5025 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 5026 bt_cb(skb)->force_active);
b71d385a 5027
57d17d70 5028 hci_send_frame(hdev, skb);
b71d385a
AE		 5029 hdev->acl_last_tx = jiffies;
5030
5031 hdev->block_cnt -= blocks;
5032 quote -= blocks;
5033
5034 chan->sent += blocks;
5035 chan->conn->sent += blocks;
5036 }
5037 }
5038
5039 if (cnt != hdev->block_cnt)
bd1eb66b 5040 hci_prio_recalculate(hdev, type);
b71d385a
AE		 5041}
5042
6039aa73 5043static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 5044{
5045 BT_DBG("%s", hdev->name);
5046
bd1eb66b
AE		 5047 /* No ACL link over BR/EDR controller */
5048 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
5049 return;
5050
5051 /* No AMP link over AMP controller */
5052 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 5053 return;
5054
5055 switch (hdev->flow_ctl_mode) {
5056 case HCI_FLOW_CTL_MODE_PACKET_BASED:
5057 hci_sched_acl_pkt(hdev);
5058 break;
5059
5060 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
5061 hci_sched_acl_blk(hdev);
5062 break;
5063 }
5064}
5065
1da177e4 5066/* Schedule SCO */
6039aa73 5067static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 5068{
5069 struct hci_conn *conn;
5070 struct sk_buff *skb;
5071 int quote;
5072
5073 BT_DBG("%s", hdev->name);
5074
52087a79
LAD		 5075 if (!hci_conn_num(hdev, SCO_LINK))
5076 return;
5077
1da177e4
LT		 5078 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
5079 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
5080 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 5081 hci_send_frame(hdev, skb);
1da177e4
LT		 5082
5083 conn->sent++;
5084 if (conn->sent == ~0)
5085 conn->sent = 0;
5086 }
5087 }
5088}
5089
6039aa73 5090static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 5091{
5092 struct hci_conn *conn;
5093 struct sk_buff *skb;
5094 int quote;
5095
5096 BT_DBG("%s", hdev->name);
5097
52087a79
LAD		 5098 if (!hci_conn_num(hdev, ESCO_LINK))
5099 return;
5100
8fc9ced3
GP		 5101 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
5102 &quote))) {
b6a0dc82
MH		 5103 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
5104 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 5105 hci_send_frame(hdev, skb);
b6a0dc82
MH		 5106
5107 conn->sent++;
5108 if (conn->sent == ~0)
5109 conn->sent = 0;
5110 }
5111 }
5112}
5113
6039aa73 5114static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 5115{
73d80deb 5116 struct hci_chan *chan;
6ed58ec5 5117 struct sk_buff *skb;
02b20f0b 5118 int quote, cnt, tmp;
6ed58ec5
VT		 5119
5120 BT_DBG("%s", hdev->name);
5121
52087a79
LAD		 5122 if (!hci_conn_num(hdev, LE_LINK))
5123 return;
5124
4a964404 5125 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
6ed58ec5
VT		 5126 /* LE tx timeout must be longer than maximum
5127 * link supervision timeout (40.9 seconds) */
bae1f5d9 5128 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 5129 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 5130 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 5131 }
5132
5133 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 5134 tmp = cnt;
73d80deb 5135 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 5136 u32 priority = (skb_peek(&chan->data_q))->priority;
5137 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 5138 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 5139 skb->len, skb->priority);
6ed58ec5 5140
ec1cce24
LAD		 5141 /* Stop if priority has changed */
5142 if (skb->priority < priority)
5143 break;
5144
5145 skb = skb_dequeue(&chan->data_q);
5146
57d17d70 5147 hci_send_frame(hdev, skb);
6ed58ec5
VT		 5148 hdev->le_last_tx = jiffies;
5149
5150 cnt--;
73d80deb
LAD		 5151 chan->sent++;
5152 chan->conn->sent++;
6ed58ec5
VT		 5153 }
5154 }
73d80deb 5155
6ed58ec5
VT		 5156 if (hdev->le_pkts)
5157 hdev->le_cnt = cnt;
5158 else
5159 hdev->acl_cnt = cnt;
02b20f0b
LAD		 5160
5161 if (cnt != tmp)
5162 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 5163}
5164
3eff45ea 5165static void hci_tx_work(struct work_struct *work)
1da177e4 5166{
3eff45ea 5167 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 5168 struct sk_buff *skb;
5169
6ed58ec5 5170 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 5171 hdev->sco_cnt, hdev->le_cnt);
1da177e4 5172
52de599e
MH		 5173 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
5174 /* Schedule queues and send stuff to HCI driver */
5175 hci_sched_acl(hdev);
5176 hci_sched_sco(hdev);
5177 hci_sched_esco(hdev);
5178 hci_sched_le(hdev);
5179 }
6ed58ec5 5180
1da177e4
LT		 5181 /* Send next queued raw (unknown type) packet */
5182 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 5183 hci_send_frame(hdev, skb);
1da177e4
LT		 5184}
5185
25985edc 5186/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 5187
5188/* ACL data packet */
6039aa73 5189static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 5190{
5191 struct hci_acl_hdr *hdr = (void *) skb->data;
5192 struct hci_conn *conn;
5193 __u16 handle, flags;
5194
5195 skb_pull(skb, HCI_ACL_HDR_SIZE);
5196
5197 handle = __le16_to_cpu(hdr->handle);
5198 flags = hci_flags(handle);
5199 handle = hci_handle(handle);
5200
f0e09510 5201 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 5202 handle, flags);
1da177e4
LT		 5203
5204 hdev->stat.acl_rx++;
5205
5206 hci_dev_lock(hdev);
5207 conn = hci_conn_hash_lookup_handle(hdev, handle);
5208 hci_dev_unlock(hdev);
8e87d142 5209
1da177e4 5210 if (conn) {
65983fc7 5211 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 5212
1da177e4 5213 /* Send to upper protocol */
686ebf28
UF		 5214 l2cap_recv_acldata(conn, skb, flags);
5215 return;
1da177e4 5216 } else {
8e87d142 5217 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 5218 hdev->name, handle);
1da177e4
LT		 5219 }
5220
5221 kfree_skb(skb);
5222}
5223
5224/* SCO data packet */
6039aa73 5225static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 5226{
5227 struct hci_sco_hdr *hdr = (void *) skb->data;
5228 struct hci_conn *conn;
5229 __u16 handle;
5230
5231 skb_pull(skb, HCI_SCO_HDR_SIZE);
5232
5233 handle = __le16_to_cpu(hdr->handle);
5234
f0e09510 5235 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 5236
5237 hdev->stat.sco_rx++;
5238
5239 hci_dev_lock(hdev);
5240 conn = hci_conn_hash_lookup_handle(hdev, handle);
5241 hci_dev_unlock(hdev);
5242
5243 if (conn) {
1da177e4 5244 /* Send to upper protocol */
686ebf28
UF		 5245 sco_recv_scodata(conn, skb);
5246 return;
1da177e4 5247 } else {
8e87d142 5248 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 5249 hdev->name, handle);
1da177e4
LT		 5250 }
5251
5252 kfree_skb(skb);
5253}
5254
9238f36a
JH		 5255static bool hci_req_is_complete(struct hci_dev *hdev)
5256{
5257 struct sk_buff *skb;
5258
5259 skb = skb_peek(&hdev->cmd_q);
5260 if (!skb)
5261 return true;
5262
5263 return bt_cb(skb)->req.start;
5264}
5265
42c6b129
JH		 5266static void hci_resend_last(struct hci_dev *hdev)
5267{
5268 struct hci_command_hdr *sent;
5269 struct sk_buff *skb;
5270 u16 opcode;
5271
5272 if (!hdev->sent_cmd)
5273 return;
5274
5275 sent = (void *) hdev->sent_cmd->data;
5276 opcode = __le16_to_cpu(sent->opcode);
5277 if (opcode == HCI_OP_RESET)
5278 return;
5279
5280 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
5281 if (!skb)
5282 return;
5283
5284 skb_queue_head(&hdev->cmd_q, skb);
5285 queue_work(hdev->workqueue, &hdev->cmd_work);
5286}
5287
9238f36a
JH		 5288void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
5289{
5290 hci_req_complete_t req_complete = NULL;
5291 struct sk_buff *skb;
5292 unsigned long flags;
5293
5294 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
5295
42c6b129
JH		 5296 /* If the completed command doesn't match the last one that was
5297 * sent we need to do special handling of it.
9238f36a 5298 */
42c6b129
JH		 5299 if (!hci_sent_cmd_data(hdev, opcode)) {
5300 /* Some CSR based controllers generate a spontaneous
5301 * reset complete event during init and any pending
5302 * command will never be completed. In such a case we
5303 * need to resend whatever was the last sent
5304 * command.
5305 */
5306 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
5307 hci_resend_last(hdev);
5308
9238f36a 5309 return;
42c6b129 5310 }
9238f36a
JH		 5311
5312 /* If the command succeeded and there's still more commands in
5313 * this request the request is not yet complete.
5314 */
5315 if (!status && !hci_req_is_complete(hdev))
5316 return;
5317
5318 /* If this was the last command in a request the complete
5319 * callback would be found in hdev->sent_cmd instead of the
5320 * command queue (hdev->cmd_q).
5321 */
5322 if (hdev->sent_cmd) {
5323 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 5324
5325 if (req_complete) {
5326 /* We must set the complete callback to NULL to
5327 * avoid calling the callback more than once if
5328 * this function gets called again.
5329 */
5330 bt_cb(hdev->sent_cmd)->req.complete = NULL;
5331
9238f36a 5332 goto call_complete;
53e21fbc 5333 }
9238f36a
JH		 5334 }
5335
5336 /* Remove all pending commands belonging to this request */
5337 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
5338 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
5339 if (bt_cb(skb)->req.start) {
5340 __skb_queue_head(&hdev->cmd_q, skb);
5341 break;
5342 }
5343
5344 req_complete = bt_cb(skb)->req.complete;
5345 kfree_skb(skb);
5346 }
5347 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
5348
5349call_complete:
5350 if (req_complete)
5351 req_complete(hdev, status);
5352}
5353
b78752cc 5354static void hci_rx_work(struct work_struct *work)
1da177e4 5355{
b78752cc 5356 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 5357 struct sk_buff *skb;
5358
5359 BT_DBG("%s", hdev->name);
5360
1da177e4 5361 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 5362 /* Send copy to monitor */
5363 hci_send_to_monitor(hdev, skb);
5364
1da177e4
LT		 5365 if (atomic_read(&hdev->promisc)) {
5366 /* Send copy to the sockets */
470fe1b5 5367 hci_send_to_sock(hdev, skb);
1da177e4
LT		 5368 }
5369
fee746b0 5370 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1da177e4
LT		 5371 kfree_skb(skb);
5372 continue;
5373 }
5374
5375 if (test_bit(HCI_INIT, &hdev->flags)) {
5376 /* Don't process data packets in this states. */
0d48d939 5377 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 5378 case HCI_ACLDATA_PKT:
5379 case HCI_SCODATA_PKT:
5380 kfree_skb(skb);
5381 continue;
3ff50b79 5382 }
1da177e4
LT		 5383 }
5384
5385 /* Process frame */
0d48d939 5386 switch (bt_cb(skb)->pkt_type) {
1da177e4 5387 case HCI_EVENT_PKT:
b78752cc 5388 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 5389 hci_event_packet(hdev, skb);
5390 break;
5391
5392 case HCI_ACLDATA_PKT:
5393 BT_DBG("%s ACL data packet", hdev->name);
5394 hci_acldata_packet(hdev, skb);
5395 break;
5396
5397 case HCI_SCODATA_PKT:
5398 BT_DBG("%s SCO data packet", hdev->name);
5399 hci_scodata_packet(hdev, skb);
5400 break;
5401
5402 default:
5403 kfree_skb(skb);
5404 break;
5405 }
5406 }
1da177e4
LT		 5407}
5408
c347b765 5409static void hci_cmd_work(struct work_struct *work)
1da177e4 5410{
c347b765 5411 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 5412 struct sk_buff *skb;
5413
2104786b
AE		 5414 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
5415 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 5416
1da177e4 5417 /* Send queued commands */
5a08ecce
AE		 5418 if (atomic_read(&hdev->cmd_cnt)) {
5419 skb = skb_dequeue(&hdev->cmd_q);
5420 if (!skb)
5421 return;
5422
7585b97a 5423 kfree_skb(hdev->sent_cmd);
1da177e4 5424
a675d7f1 5425 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 5426 if (hdev->sent_cmd) {
1da177e4 5427 atomic_dec(&hdev->cmd_cnt);
57d17d70 5428 hci_send_frame(hdev, skb);
7bdb8a5c 5429 if (test_bit(HCI_RESET, &hdev->flags))
65cc2b49 5430 cancel_delayed_work(&hdev->cmd_timer);
7bdb8a5c 5431 else
65cc2b49
MH		 5432 schedule_delayed_work(&hdev->cmd_timer,
5433 HCI_CMD_TIMEOUT);
1da177e4
LT		 5434 } else {
5435 skb_queue_head(&hdev->cmd_q, skb);
c347b765 5436 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 5437 }
5438 }
5439}
b1efcc28
AG		 5440
5441void hci_req_add_le_scan_disable(struct hci_request *req)
5442{
5443 struct hci_cp_le_set_scan_enable cp;
5444
5445 memset(&cp, 0, sizeof(cp));
5446 cp.enable = LE_SCAN_DISABLE;
5447 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
5448}
a4790dbd 5449
8540f6c0
MH		 5450static void add_to_white_list(struct hci_request *req,
5451 struct hci_conn_params *params)
5452{
5453 struct hci_cp_le_add_to_white_list cp;
5454
5455 cp.bdaddr_type = params->addr_type;
5456 bacpy(&cp.bdaddr, &params->addr);
5457
5458 hci_req_add(req, HCI_OP_LE_ADD_TO_WHITE_LIST, sizeof(cp), &cp);
5459}
5460
5461static u8 update_white_list(struct hci_request *req)
5462{
5463 struct hci_dev *hdev = req->hdev;
5464 struct hci_conn_params *params;
5465 struct bdaddr_list *b;
5466 uint8_t white_list_entries = 0;
5467
5468 /* Go through the current white list programmed into the
5469 * controller one by one and check if that address is still
5470 * in the list of pending connections or list of devices to
5471 * report. If not present in either list, then queue the
5472 * command to remove it from the controller.
5473 */
5474 list_for_each_entry(b, &hdev->le_white_list, list) {
5475 struct hci_cp_le_del_from_white_list cp;
5476
5477 if (hci_pend_le_action_lookup(&hdev->pend_le_conns,
5478 &b->bdaddr, b->bdaddr_type) ||
5479 hci_pend_le_action_lookup(&hdev->pend_le_reports,
5480 &b->bdaddr, b->bdaddr_type)) {
5481 white_list_entries++;
5482 continue;
5483 }
5484
5485 cp.bdaddr_type = b->bdaddr_type;
5486 bacpy(&cp.bdaddr, &b->bdaddr);
5487
5488 hci_req_add(req, HCI_OP_LE_DEL_FROM_WHITE_LIST,
5489 sizeof(cp), &cp);
5490 }
5491
5492 /* Since all no longer valid white list entries have been
5493 * removed, walk through the list of pending connections
5494 * and ensure that any new device gets programmed into
5495 * the controller.
5496 *
5497 * If the list of the devices is larger than the list of
5498 * available white list entries in the controller, then
5499 * just abort and return filer policy value to not use the
5500 * white list.
5501 */
5502 list_for_each_entry(params, &hdev->pend_le_conns, action) {
5503 if (hci_bdaddr_list_lookup(&hdev->le_white_list,
5504 &params->addr, params->addr_type))
5505 continue;
5506
5507 if (white_list_entries >= hdev->le_white_list_size) {
5508 /* Select filter policy to accept all advertising */
5509 return 0x00;
5510 }
5511
66d8e837
MH		 5512 if (hci_find_irk_by_addr(hdev, &params->addr,
5513 params->addr_type)) {
5514 /* White list can not be used with RPAs */
5515 return 0x00;
5516 }
5517
8540f6c0
MH		 5518 white_list_entries++;
5519 add_to_white_list(req, params);
5520 }
5521
5522 /* After adding all new pending connections, walk through
5523 * the list of pending reports and also add these to the
5524 * white list if there is still space.
5525 */
5526 list_for_each_entry(params, &hdev->pend_le_reports, action) {
5527 if (hci_bdaddr_list_lookup(&hdev->le_white_list,
5528 &params->addr, params->addr_type))
5529 continue;
5530
5531 if (white_list_entries >= hdev->le_white_list_size) {
5532 /* Select filter policy to accept all advertising */
5533 return 0x00;
5534 }
5535
66d8e837
MH		 5536 if (hci_find_irk_by_addr(hdev, &params->addr,
5537 params->addr_type)) {
5538 /* White list can not be used with RPAs */
5539 return 0x00;
5540 }
5541
8540f6c0
MH		 5542 white_list_entries++;
5543 add_to_white_list(req, params);
5544 }
5545
5546 /* Select filter policy to use white list */
5547 return 0x01;
5548}
5549
8ef30fd3
AG		 5550void hci_req_add_le_passive_scan(struct hci_request *req)
5551{
5552 struct hci_cp_le_set_scan_param param_cp;
5553 struct hci_cp_le_set_scan_enable enable_cp;
5554 struct hci_dev *hdev = req->hdev;
5555 u8 own_addr_type;
8540f6c0 5556 u8 filter_policy;
8ef30fd3 5557
6ab535a7
MH		 5558 /* Set require_privacy to false since no SCAN_REQ are send
5559 * during passive scanning. Not using an unresolvable address
5560 * here is important so that peer devices using direct
5561 * advertising with our address will be correctly reported
5562 * by the controller.
8ef30fd3 5563 */
6ab535a7 5564 if (hci_update_random_address(req, false, &own_addr_type))
8ef30fd3
AG		 5565 return;
5566
8540f6c0
MH		 5567 /* Adding or removing entries from the white list must
5568 * happen before enabling scanning. The controller does
5569 * not allow white list modification while scanning.
5570 */
5571 filter_policy = update_white_list(req);
5572
8ef30fd3
AG		 5573 memset(&param_cp, 0, sizeof(param_cp));
5574 param_cp.type = LE_SCAN_PASSIVE;
5575 param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
5576 param_cp.window = cpu_to_le16(hdev->le_scan_window);
5577 param_cp.own_address_type = own_addr_type;
8540f6c0 5578 param_cp.filter_policy = filter_policy;
8ef30fd3
AG		 5579 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
5580 &param_cp);
5581
5582 memset(&enable_cp, 0, sizeof(enable_cp));
5583 enable_cp.enable = LE_SCAN_ENABLE;
4340a124 5584 enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
8ef30fd3
AG		 5585 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
5586 &enable_cp);
5587}
5588
a4790dbd
AG		 5589static void update_background_scan_complete(struct hci_dev *hdev, u8 status)
5590{
5591 if (status)
5592 BT_DBG("HCI request failed to update background scanning: "
5593 "status 0x%2.2x", status);
5594}
5595
5596/* This function controls the background scanning based on hdev->pend_le_conns
5597 * list. If there are pending LE connection we start the background scanning,
5598 * otherwise we stop it.
5599 *
5600 * This function requires the caller holds hdev->lock.
5601 */
5602void hci_update_background_scan(struct hci_dev *hdev)
5603{
a4790dbd
AG		 5604 struct hci_request req;
5605 struct hci_conn *conn;
5606 int err;
5607
c20c02d5
MH		 5608 if (!test_bit(HCI_UP, &hdev->flags) ||
5609 test_bit(HCI_INIT, &hdev->flags) ||
5610 test_bit(HCI_SETUP, &hdev->dev_flags) ||
d603b76b 5611 test_bit(HCI_CONFIG, &hdev->dev_flags) ||
b8221770 5612 test_bit(HCI_AUTO_OFF, &hdev->dev_flags) ||
c20c02d5 5613 test_bit(HCI_UNREGISTER, &hdev->dev_flags))
1c1697c0
MH		 5614 return;
5615
a70f4b5f
JH		 5616 /* No point in doing scanning if LE support hasn't been enabled */
5617 if (!test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
5618 return;
5619
ae23ada4
JH		 5620 /* If discovery is active don't interfere with it */
5621 if (hdev->discovery.state != DISCOVERY_STOPPED)
5622 return;
5623
a4790dbd
AG		 5624 hci_req_init(&req, hdev);
5625
d1d588c1 5626 if (list_empty(&hdev->pend_le_conns) &&
66f8455a 5627 list_empty(&hdev->pend_le_reports)) {
0d2bf134
JH		 5628 /* If there is no pending LE connections or devices
5629 * to be scanned for, we should stop the background
5630 * scanning.
a4790dbd
AG		 5631 */
5632
5633 /* If controller is not scanning we are done. */
5634 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
5635 return;
5636
5637 hci_req_add_le_scan_disable(&req);
5638
5639 BT_DBG("%s stopping background scanning", hdev->name);
5640 } else {
a4790dbd
AG		 5641 /* If there is at least one pending LE connection, we should
5642 * keep the background scan running.
5643 */
5644
a4790dbd
AG		 5645 /* If controller is connecting, we should not start scanning
5646 * since some controllers are not able to scan and connect at
5647 * the same time.
5648 */
5649 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
5650 if (conn)
5651 return;
5652
4340a124
AG		 5653 /* If controller is currently scanning, we stop it to ensure we
5654 * don't miss any advertising (due to duplicates filter).
5655 */
5656 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
5657 hci_req_add_le_scan_disable(&req);
5658
8ef30fd3 5659 hci_req_add_le_passive_scan(&req);
a4790dbd
AG		 5660
5661 BT_DBG("%s starting background scanning", hdev->name);
5662 }
5663
5664 err = hci_req_run(&req, update_background_scan_complete);
5665 if (err)
5666 BT_ERR("Failed to run HCI request: err %d", err);
5667}
432df05e 5668
22f433dc
JH		 5669static bool disconnected_whitelist_entries(struct hci_dev *hdev)
5670{
5671 struct bdaddr_list *b;
5672
5673 list_for_each_entry(b, &hdev->whitelist, list) {
5674 struct hci_conn *conn;
5675
5676 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
5677 if (!conn)
5678 return true;
5679
5680 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
5681 return true;
5682 }
5683
5684 return false;
5685}
5686
432df05e
JH		 5687void hci_update_page_scan(struct hci_dev *hdev, struct hci_request *req)
5688{
5689 u8 scan;
5690
5691 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags))
5692 return;
5693
5694 if (!hdev_is_powered(hdev))
5695 return;
5696
5697 if (mgmt_powering_down(hdev))
5698 return;
5699
5700 if (test_bit(HCI_CONNECTABLE, &hdev->dev_flags) ||
22f433dc 5701 disconnected_whitelist_entries(hdev))
432df05e
JH		 5702 scan = SCAN_PAGE;
5703 else
5704 scan = SCAN_DISABLED;
5705
5706 if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE))
5707 return;
5708
5709 if (test_bit(HCI_DISCOVERABLE, &hdev->dev_flags))
5710 scan |= SCAN_INQUIRY;
5711
5712 if (req)
5713 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
5714 else
5715 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
5716}
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