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Bluetooth: Enable duplicates filter in background scan
[mirror_ubuntu-artful-kernel.git] / net / bluetooth / hci_core.c
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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>
37
970c4e46
JH		 38#include "smp.h"
39
b78752cc 40static void hci_rx_work(struct work_struct *work);
c347b765 41static void hci_cmd_work(struct work_struct *work);
3eff45ea 42static void hci_tx_work(struct work_struct *work);
1da177e4 43
1da177e4
LT		 44/* HCI device list */
45LIST_HEAD(hci_dev_list);
46DEFINE_RWLOCK(hci_dev_list_lock);
47
48/* HCI callback list */
49LIST_HEAD(hci_cb_list);
50DEFINE_RWLOCK(hci_cb_list_lock);
51
3df92b31
SL		 52/* HCI ID Numbering */
53static DEFINE_IDA(hci_index_ida);
54
1da177e4
LT		 55/* ---- HCI notifications ---- */
56
6516455d 57static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 58{
040030ef 59 hci_sock_dev_event(hdev, event);
1da177e4
LT		 60}
61
baf27f6e
MH		 62/* ---- HCI debugfs entries ---- */
63
4b4148e9
MH		 64static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
65 size_t count, loff_t *ppos)
66{
67 struct hci_dev *hdev = file->private_data;
68 char buf[3];
69
70 buf[0] = test_bit(HCI_DUT_MODE, &hdev->dev_flags) ? 'Y': 'N';
71 buf[1] = '\n';
72 buf[2] = '\0';
73 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
74}
75
76static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
77 size_t count, loff_t *ppos)
78{
79 struct hci_dev *hdev = file->private_data;
80 struct sk_buff *skb;
81 char buf[32];
82 size_t buf_size = min(count, (sizeof(buf)-1));
83 bool enable;
84 int err;
85
86 if (!test_bit(HCI_UP, &hdev->flags))
87 return -ENETDOWN;
88
89 if (copy_from_user(buf, user_buf, buf_size))
90 return -EFAULT;
91
92 buf[buf_size] = '\0';
93 if (strtobool(buf, &enable))
94 return -EINVAL;
95
96 if (enable == test_bit(HCI_DUT_MODE, &hdev->dev_flags))
97 return -EALREADY;
98
99 hci_req_lock(hdev);
100 if (enable)
101 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
102 HCI_CMD_TIMEOUT);
103 else
104 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
105 HCI_CMD_TIMEOUT);
106 hci_req_unlock(hdev);
107
108 if (IS_ERR(skb))
109 return PTR_ERR(skb);
110
111 err = -bt_to_errno(skb->data[0]);
112 kfree_skb(skb);
113
114 if (err < 0)
115 return err;
116
117 change_bit(HCI_DUT_MODE, &hdev->dev_flags);
118
119 return count;
120}
121
122static const struct file_operations dut_mode_fops = {
123 .open = simple_open,
124 .read = dut_mode_read,
125 .write = dut_mode_write,
126 .llseek = default_llseek,
127};
128
dfb826a8
MH		 129static int features_show(struct seq_file *f, void *ptr)
130{
131 struct hci_dev *hdev = f->private;
132 u8 p;
133
134 hci_dev_lock(hdev);
135 for (p = 0; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
cfbb2b5b 136 seq_printf(f, "%2u: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
dfb826a8
MH		 137 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n", p,
138 hdev->features[p][0], hdev->features[p][1],
139 hdev->features[p][2], hdev->features[p][3],
140 hdev->features[p][4], hdev->features[p][5],
141 hdev->features[p][6], hdev->features[p][7]);
142 }
cfbb2b5b
MH		 143 if (lmp_le_capable(hdev))
144 seq_printf(f, "LE: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
145 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n",
146 hdev->le_features[0], hdev->le_features[1],
147 hdev->le_features[2], hdev->le_features[3],
148 hdev->le_features[4], hdev->le_features[5],
149 hdev->le_features[6], hdev->le_features[7]);
dfb826a8
MH		 150 hci_dev_unlock(hdev);
151
152 return 0;
153}
154
155static int features_open(struct inode *inode, struct file *file)
156{
157 return single_open(file, features_show, inode->i_private);
158}
159
160static const struct file_operations features_fops = {
161 .open = features_open,
162 .read = seq_read,
163 .llseek = seq_lseek,
164 .release = single_release,
165};
166
70afe0b8
MH		 167static int blacklist_show(struct seq_file *f, void *p)
168{
169 struct hci_dev *hdev = f->private;
170 struct bdaddr_list *b;
171
172 hci_dev_lock(hdev);
173 list_for_each_entry(b, &hdev->blacklist, list)
b25f0785 174 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
70afe0b8
MH		 175 hci_dev_unlock(hdev);
176
177 return 0;
178}
179
180static int blacklist_open(struct inode *inode, struct file *file)
181{
182 return single_open(file, blacklist_show, inode->i_private);
183}
184
185static const struct file_operations blacklist_fops = {
186 .open = blacklist_open,
187 .read = seq_read,
188 .llseek = seq_lseek,
189 .release = single_release,
190};
191
47219839
MH		 192static int uuids_show(struct seq_file *f, void *p)
193{
194 struct hci_dev *hdev = f->private;
195 struct bt_uuid *uuid;
196
197 hci_dev_lock(hdev);
198 list_for_each_entry(uuid, &hdev->uuids, list) {
58f01aa9
MH		 199 u8 i, val[16];
200
201 /* The Bluetooth UUID values are stored in big endian,
202 * but with reversed byte order. So convert them into
203 * the right order for the %pUb modifier.
204 */
205 for (i = 0; i < 16; i++)
206 val[i] = uuid->uuid[15 - i];
207
208 seq_printf(f, "%pUb\n", val);
47219839
MH		 209 }
210 hci_dev_unlock(hdev);
211
212 return 0;
213}
214
215static int uuids_open(struct inode *inode, struct file *file)
216{
217 return single_open(file, uuids_show, inode->i_private);
218}
219
220static const struct file_operations uuids_fops = {
221 .open = uuids_open,
222 .read = seq_read,
223 .llseek = seq_lseek,
224 .release = single_release,
225};
226
baf27f6e
MH		 227static int inquiry_cache_show(struct seq_file *f, void *p)
228{
229 struct hci_dev *hdev = f->private;
230 struct discovery_state *cache = &hdev->discovery;
231 struct inquiry_entry *e;
232
233 hci_dev_lock(hdev);
234
235 list_for_each_entry(e, &cache->all, all) {
236 struct inquiry_data *data = &e->data;
237 seq_printf(f, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
238 &data->bdaddr,
239 data->pscan_rep_mode, data->pscan_period_mode,
240 data->pscan_mode, data->dev_class[2],
241 data->dev_class[1], data->dev_class[0],
242 __le16_to_cpu(data->clock_offset),
243 data->rssi, data->ssp_mode, e->timestamp);
244 }
245
246 hci_dev_unlock(hdev);
247
248 return 0;
249}
250
251static int inquiry_cache_open(struct inode *inode, struct file *file)
252{
253 return single_open(file, inquiry_cache_show, inode->i_private);
254}
255
256static const struct file_operations inquiry_cache_fops = {
257 .open = inquiry_cache_open,
258 .read = seq_read,
259 .llseek = seq_lseek,
260 .release = single_release,
261};
262
02d08d15
MH		 263static int link_keys_show(struct seq_file *f, void *ptr)
264{
265 struct hci_dev *hdev = f->private;
266 struct list_head *p, *n;
267
268 hci_dev_lock(hdev);
269 list_for_each_safe(p, n, &hdev->link_keys) {
270 struct link_key *key = list_entry(p, struct link_key, list);
271 seq_printf(f, "%pMR %u %*phN %u\n", &key->bdaddr, key->type,
272 HCI_LINK_KEY_SIZE, key->val, key->pin_len);
273 }
274 hci_dev_unlock(hdev);
275
276 return 0;
277}
278
279static int link_keys_open(struct inode *inode, struct file *file)
280{
281 return single_open(file, link_keys_show, inode->i_private);
282}
283
284static const struct file_operations link_keys_fops = {
285 .open = link_keys_open,
286 .read = seq_read,
287 .llseek = seq_lseek,
288 .release = single_release,
289};
290
babdbb3c
MH		 291static int dev_class_show(struct seq_file *f, void *ptr)
292{
293 struct hci_dev *hdev = f->private;
294
295 hci_dev_lock(hdev);
296 seq_printf(f, "0x%.2x%.2x%.2x\n", hdev->dev_class[2],
297 hdev->dev_class[1], hdev->dev_class[0]);
298 hci_dev_unlock(hdev);
299
300 return 0;
301}
302
303static int dev_class_open(struct inode *inode, struct file *file)
304{
305 return single_open(file, dev_class_show, inode->i_private);
306}
307
308static const struct file_operations dev_class_fops = {
309 .open = dev_class_open,
310 .read = seq_read,
311 .llseek = seq_lseek,
312 .release = single_release,
313};
314
041000b9
MH		 315static int voice_setting_get(void *data, u64 *val)
316{
317 struct hci_dev *hdev = data;
318
319 hci_dev_lock(hdev);
320 *val = hdev->voice_setting;
321 hci_dev_unlock(hdev);
322
323 return 0;
324}
325
326DEFINE_SIMPLE_ATTRIBUTE(voice_setting_fops, voice_setting_get,
327 NULL, "0x%4.4llx\n");
328
ebd1e33b
MH		 329static int auto_accept_delay_set(void *data, u64 val)
330{
331 struct hci_dev *hdev = data;
332
333 hci_dev_lock(hdev);
334 hdev->auto_accept_delay = val;
335 hci_dev_unlock(hdev);
336
337 return 0;
338}
339
340static int auto_accept_delay_get(void *data, u64 *val)
341{
342 struct hci_dev *hdev = data;
343
344 hci_dev_lock(hdev);
345 *val = hdev->auto_accept_delay;
346 hci_dev_unlock(hdev);
347
348 return 0;
349}
350
351DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get,
352 auto_accept_delay_set, "%llu\n");
353
06f5b778
MH		 354static int ssp_debug_mode_set(void *data, u64 val)
355{
356 struct hci_dev *hdev = data;
357 struct sk_buff *skb;
358 __u8 mode;
359 int err;
360
361 if (val != 0 && val != 1)
362 return -EINVAL;
363
364 if (!test_bit(HCI_UP, &hdev->flags))
365 return -ENETDOWN;
366
367 hci_req_lock(hdev);
368 mode = val;
369 skb = __hci_cmd_sync(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE, sizeof(mode),
370 &mode, HCI_CMD_TIMEOUT);
371 hci_req_unlock(hdev);
372
373 if (IS_ERR(skb))
374 return PTR_ERR(skb);
375
376 err = -bt_to_errno(skb->data[0]);
377 kfree_skb(skb);
378
379 if (err < 0)
380 return err;
381
382 hci_dev_lock(hdev);
383 hdev->ssp_debug_mode = val;
384 hci_dev_unlock(hdev);
385
386 return 0;
387}
388
389static int ssp_debug_mode_get(void *data, u64 *val)
390{
391 struct hci_dev *hdev = data;
392
393 hci_dev_lock(hdev);
394 *val = hdev->ssp_debug_mode;
395 hci_dev_unlock(hdev);
396
397 return 0;
398}
399
400DEFINE_SIMPLE_ATTRIBUTE(ssp_debug_mode_fops, ssp_debug_mode_get,
401 ssp_debug_mode_set, "%llu\n");
402
5afeac14
MH		 403static ssize_t force_sc_support_read(struct file *file, char __user *user_buf,
404 size_t count, loff_t *ppos)
405{
406 struct hci_dev *hdev = file->private_data;
407 char buf[3];
408
409 buf[0] = test_bit(HCI_FORCE_SC, &hdev->dev_flags) ? 'Y': 'N';
410 buf[1] = '\n';
411 buf[2] = '\0';
412 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
413}
414
415static ssize_t force_sc_support_write(struct file *file,
416 const char __user *user_buf,
417 size_t count, loff_t *ppos)
418{
419 struct hci_dev *hdev = file->private_data;
420 char buf[32];
421 size_t buf_size = min(count, (sizeof(buf)-1));
422 bool enable;
423
424 if (test_bit(HCI_UP, &hdev->flags))
425 return -EBUSY;
426
427 if (copy_from_user(buf, user_buf, buf_size))
428 return -EFAULT;
429
430 buf[buf_size] = '\0';
431 if (strtobool(buf, &enable))
432 return -EINVAL;
433
434 if (enable == test_bit(HCI_FORCE_SC, &hdev->dev_flags))
435 return -EALREADY;
436
437 change_bit(HCI_FORCE_SC, &hdev->dev_flags);
438
439 return count;
440}
441
442static const struct file_operations force_sc_support_fops = {
443 .open = simple_open,
444 .read = force_sc_support_read,
445 .write = force_sc_support_write,
446 .llseek = default_llseek,
447};
448
134c2a89
MH		 449static ssize_t sc_only_mode_read(struct file *file, char __user *user_buf,
450 size_t count, loff_t *ppos)
451{
452 struct hci_dev *hdev = file->private_data;
453 char buf[3];
454
455 buf[0] = test_bit(HCI_SC_ONLY, &hdev->dev_flags) ? 'Y': 'N';
456 buf[1] = '\n';
457 buf[2] = '\0';
458 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
459}
460
461static const struct file_operations sc_only_mode_fops = {
462 .open = simple_open,
463 .read = sc_only_mode_read,
464 .llseek = default_llseek,
465};
466
2bfa3531
MH		 467static int idle_timeout_set(void *data, u64 val)
468{
469 struct hci_dev *hdev = data;
470
471 if (val != 0 && (val < 500 || val > 3600000))
472 return -EINVAL;
473
474 hci_dev_lock(hdev);
2be48b65 475 hdev->idle_timeout = val;
2bfa3531
MH		 476 hci_dev_unlock(hdev);
477
478 return 0;
479}
480
481static int idle_timeout_get(void *data, u64 *val)
482{
483 struct hci_dev *hdev = data;
484
485 hci_dev_lock(hdev);
486 *val = hdev->idle_timeout;
487 hci_dev_unlock(hdev);
488
489 return 0;
490}
491
492DEFINE_SIMPLE_ATTRIBUTE(idle_timeout_fops, idle_timeout_get,
493 idle_timeout_set, "%llu\n");
494
c982b2ea
JH		 495static int rpa_timeout_set(void *data, u64 val)
496{
497 struct hci_dev *hdev = data;
498
499 /* Require the RPA timeout to be at least 30 seconds and at most
500 * 24 hours.
501 */
502 if (val < 30 || val > (60 * 60 * 24))
503 return -EINVAL;
504
505 hci_dev_lock(hdev);
506 hdev->rpa_timeout = val;
507 hci_dev_unlock(hdev);
508
509 return 0;
510}
511
512static int rpa_timeout_get(void *data, u64 *val)
513{
514 struct hci_dev *hdev = data;
515
516 hci_dev_lock(hdev);
517 *val = hdev->rpa_timeout;
518 hci_dev_unlock(hdev);
519
520 return 0;
521}
522
523DEFINE_SIMPLE_ATTRIBUTE(rpa_timeout_fops, rpa_timeout_get,
524 rpa_timeout_set, "%llu\n");
525
2bfa3531
MH		 526static int sniff_min_interval_set(void *data, u64 val)
527{
528 struct hci_dev *hdev = data;
529
530 if (val == 0 || val % 2 || val > hdev->sniff_max_interval)
531 return -EINVAL;
532
533 hci_dev_lock(hdev);
2be48b65 534 hdev->sniff_min_interval = val;
2bfa3531
MH		 535 hci_dev_unlock(hdev);
536
537 return 0;
538}
539
540static int sniff_min_interval_get(void *data, u64 *val)
541{
542 struct hci_dev *hdev = data;
543
544 hci_dev_lock(hdev);
545 *val = hdev->sniff_min_interval;
546 hci_dev_unlock(hdev);
547
548 return 0;
549}
550
551DEFINE_SIMPLE_ATTRIBUTE(sniff_min_interval_fops, sniff_min_interval_get,
552 sniff_min_interval_set, "%llu\n");
553
554static int sniff_max_interval_set(void *data, u64 val)
555{
556 struct hci_dev *hdev = data;
557
558 if (val == 0 || val % 2 || val < hdev->sniff_min_interval)
559 return -EINVAL;
560
561 hci_dev_lock(hdev);
2be48b65 562 hdev->sniff_max_interval = val;
2bfa3531
MH		 563 hci_dev_unlock(hdev);
564
565 return 0;
566}
567
568static int sniff_max_interval_get(void *data, u64 *val)
569{
570 struct hci_dev *hdev = data;
571
572 hci_dev_lock(hdev);
573 *val = hdev->sniff_max_interval;
574 hci_dev_unlock(hdev);
575
576 return 0;
577}
578
579DEFINE_SIMPLE_ATTRIBUTE(sniff_max_interval_fops, sniff_max_interval_get,
580 sniff_max_interval_set, "%llu\n");
581
ac345813
MH		 582static int identity_show(struct seq_file *f, void *p)
583{
584 struct hci_dev *hdev = f->private;
a1f4c318 585 bdaddr_t addr;
ac345813
MH		 586 u8 addr_type;
587
588 hci_dev_lock(hdev);
589
a1f4c318 590 hci_copy_identity_address(hdev, &addr, &addr_type);
ac345813 591
a1f4c318 592 seq_printf(f, "%pMR (type %u) %*phN %pMR\n", &addr, addr_type,
473deef2 593 16, hdev->irk, &hdev->rpa);
ac345813
MH		 594
595 hci_dev_unlock(hdev);
596
597 return 0;
598}
599
600static int identity_open(struct inode *inode, struct file *file)
601{
602 return single_open(file, identity_show, inode->i_private);
603}
604
605static const struct file_operations identity_fops = {
606 .open = identity_open,
607 .read = seq_read,
608 .llseek = seq_lseek,
609 .release = single_release,
610};
611
7a4cd51d
MH		 612static int random_address_show(struct seq_file *f, void *p)
613{
614 struct hci_dev *hdev = f->private;
615
616 hci_dev_lock(hdev);
617 seq_printf(f, "%pMR\n", &hdev->random_addr);
618 hci_dev_unlock(hdev);
619
620 return 0;
621}
622
623static int random_address_open(struct inode *inode, struct file *file)
624{
625 return single_open(file, random_address_show, inode->i_private);
626}
627
628static const struct file_operations random_address_fops = {
629 .open = random_address_open,
630 .read = seq_read,
631 .llseek = seq_lseek,
632 .release = single_release,
633};
634
e7b8fc92
MH		 635static int static_address_show(struct seq_file *f, void *p)
636{
637 struct hci_dev *hdev = f->private;
638
639 hci_dev_lock(hdev);
640 seq_printf(f, "%pMR\n", &hdev->static_addr);
641 hci_dev_unlock(hdev);
642
643 return 0;
644}
645
646static int static_address_open(struct inode *inode, struct file *file)
647{
648 return single_open(file, static_address_show, inode->i_private);
649}
650
651static const struct file_operations static_address_fops = {
652 .open = static_address_open,
653 .read = seq_read,
654 .llseek = seq_lseek,
655 .release = single_release,
656};
657
b32bba6c
MH		 658static ssize_t force_static_address_read(struct file *file,
659 char __user *user_buf,
660 size_t count, loff_t *ppos)
92202185 661{
b32bba6c
MH		 662 struct hci_dev *hdev = file->private_data;
663 char buf[3];
92202185 664
b32bba6c
MH		 665 buf[0] = test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ? 'Y': 'N';
666 buf[1] = '\n';
667 buf[2] = '\0';
668 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
92202185
MH		 669}
670
b32bba6c
MH		 671static ssize_t force_static_address_write(struct file *file,
672 const char __user *user_buf,
673 size_t count, loff_t *ppos)
92202185 674{
b32bba6c
MH		 675 struct hci_dev *hdev = file->private_data;
676 char buf[32];
677 size_t buf_size = min(count, (sizeof(buf)-1));
678 bool enable;
92202185 679
b32bba6c
MH		 680 if (test_bit(HCI_UP, &hdev->flags))
681 return -EBUSY;
92202185 682
b32bba6c
MH		 683 if (copy_from_user(buf, user_buf, buf_size))
684 return -EFAULT;
685
686 buf[buf_size] = '\0';
687 if (strtobool(buf, &enable))
688 return -EINVAL;
689
690 if (enable == test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags))
691 return -EALREADY;
692
693 change_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags);
694
695 return count;
92202185
MH		 696}
697
b32bba6c
MH		 698static const struct file_operations force_static_address_fops = {
699 .open = simple_open,
700 .read = force_static_address_read,
701 .write = force_static_address_write,
702 .llseek = default_llseek,
703};
92202185 704
d2ab0ac1
MH		 705static int white_list_show(struct seq_file *f, void *ptr)
706{
707 struct hci_dev *hdev = f->private;
708 struct bdaddr_list *b;
709
710 hci_dev_lock(hdev);
711 list_for_each_entry(b, &hdev->le_white_list, list)
712 seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
713 hci_dev_unlock(hdev);
714
715 return 0;
716}
717
718static int white_list_open(struct inode *inode, struct file *file)
719{
720 return single_open(file, white_list_show, inode->i_private);
721}
722
723static const struct file_operations white_list_fops = {
724 .open = white_list_open,
725 .read = seq_read,
726 .llseek = seq_lseek,
727 .release = single_release,
728};
729
3698d704
MH		 730static int identity_resolving_keys_show(struct seq_file *f, void *ptr)
731{
732 struct hci_dev *hdev = f->private;
733 struct list_head *p, *n;
734
735 hci_dev_lock(hdev);
736 list_for_each_safe(p, n, &hdev->identity_resolving_keys) {
737 struct smp_irk *irk = list_entry(p, struct smp_irk, list);
738 seq_printf(f, "%pMR (type %u) %*phN %pMR\n",
739 &irk->bdaddr, irk->addr_type,
740 16, irk->val, &irk->rpa);
741 }
742 hci_dev_unlock(hdev);
743
744 return 0;
745}
746
747static int identity_resolving_keys_open(struct inode *inode, struct file *file)
748{
749 return single_open(file, identity_resolving_keys_show,
750 inode->i_private);
751}
752
753static const struct file_operations identity_resolving_keys_fops = {
754 .open = identity_resolving_keys_open,
755 .read = seq_read,
756 .llseek = seq_lseek,
757 .release = single_release,
758};
759
8f8625cd
MH		 760static int long_term_keys_show(struct seq_file *f, void *ptr)
761{
762 struct hci_dev *hdev = f->private;
763 struct list_head *p, *n;
764
765 hci_dev_lock(hdev);
f813f1be 766 list_for_each_safe(p, n, &hdev->long_term_keys) {
8f8625cd 767 struct smp_ltk *ltk = list_entry(p, struct smp_ltk, list);
fe39c7b2 768 seq_printf(f, "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
8f8625cd
MH		 769 &ltk->bdaddr, ltk->bdaddr_type, ltk->authenticated,
770 ltk->type, ltk->enc_size, __le16_to_cpu(ltk->ediv),
fe39c7b2 771 __le64_to_cpu(ltk->rand), 16, ltk->val);
8f8625cd
MH		 772 }
773 hci_dev_unlock(hdev);
774
775 return 0;
776}
777
778static int long_term_keys_open(struct inode *inode, struct file *file)
779{
780 return single_open(file, long_term_keys_show, inode->i_private);
781}
782
783static const struct file_operations long_term_keys_fops = {
784 .open = long_term_keys_open,
785 .read = seq_read,
786 .llseek = seq_lseek,
787 .release = single_release,
788};
789
4e70c7e7
MH		 790static int conn_min_interval_set(void *data, u64 val)
791{
792 struct hci_dev *hdev = data;
793
794 if (val < 0x0006 || val > 0x0c80 || val > hdev->le_conn_max_interval)
795 return -EINVAL;
796
797 hci_dev_lock(hdev);
2be48b65 798 hdev->le_conn_min_interval = val;
4e70c7e7
MH		 799 hci_dev_unlock(hdev);
800
801 return 0;
802}
803
804static int conn_min_interval_get(void *data, u64 *val)
805{
806 struct hci_dev *hdev = data;
807
808 hci_dev_lock(hdev);
809 *val = hdev->le_conn_min_interval;
810 hci_dev_unlock(hdev);
811
812 return 0;
813}
814
815DEFINE_SIMPLE_ATTRIBUTE(conn_min_interval_fops, conn_min_interval_get,
816 conn_min_interval_set, "%llu\n");
817
818static int conn_max_interval_set(void *data, u64 val)
819{
820 struct hci_dev *hdev = data;
821
822 if (val < 0x0006 || val > 0x0c80 || val < hdev->le_conn_min_interval)
823 return -EINVAL;
824
825 hci_dev_lock(hdev);
2be48b65 826 hdev->le_conn_max_interval = val;
4e70c7e7
MH		 827 hci_dev_unlock(hdev);
828
829 return 0;
830}
831
832static int conn_max_interval_get(void *data, u64 *val)
833{
834 struct hci_dev *hdev = data;
835
836 hci_dev_lock(hdev);
837 *val = hdev->le_conn_max_interval;
838 hci_dev_unlock(hdev);
839
840 return 0;
841}
842
843DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops, conn_max_interval_get,
844 conn_max_interval_set, "%llu\n");
845
3f959d46
MH		 846static int adv_channel_map_set(void *data, u64 val)
847{
848 struct hci_dev *hdev = data;
849
850 if (val < 0x01 || val > 0x07)
851 return -EINVAL;
852
853 hci_dev_lock(hdev);
854 hdev->le_adv_channel_map = val;
855 hci_dev_unlock(hdev);
856
857 return 0;
858}
859
860static int adv_channel_map_get(void *data, u64 *val)
861{
862 struct hci_dev *hdev = data;
863
864 hci_dev_lock(hdev);
865 *val = hdev->le_adv_channel_map;
866 hci_dev_unlock(hdev);
867
868 return 0;
869}
870
871DEFINE_SIMPLE_ATTRIBUTE(adv_channel_map_fops, adv_channel_map_get,
872 adv_channel_map_set, "%llu\n");
873
89863109
JR		 874static ssize_t lowpan_read(struct file *file, char __user *user_buf,
875 size_t count, loff_t *ppos)
876{
877 struct hci_dev *hdev = file->private_data;
878 char buf[3];
879
880 buf[0] = test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags) ? 'Y' : 'N';
881 buf[1] = '\n';
882 buf[2] = '\0';
883 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
884}
885
886static ssize_t lowpan_write(struct file *fp, const char __user *user_buffer,
887 size_t count, loff_t *position)
888{
889 struct hci_dev *hdev = fp->private_data;
890 bool enable;
891 char buf[32];
892 size_t buf_size = min(count, (sizeof(buf)-1));
893
894 if (copy_from_user(buf, user_buffer, buf_size))
895 return -EFAULT;
896
897 buf[buf_size] = '\0';
898
899 if (strtobool(buf, &enable) < 0)
900 return -EINVAL;
901
902 if (enable == test_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags))
903 return -EALREADY;
904
905 change_bit(HCI_6LOWPAN_ENABLED, &hdev->dev_flags);
906
907 return count;
908}
909
910static const struct file_operations lowpan_debugfs_fops = {
911 .open = simple_open,
912 .read = lowpan_read,
913 .write = lowpan_write,
914 .llseek = default_llseek,
915};
916
7d474e06
AG		 917static int le_auto_conn_show(struct seq_file *sf, void *ptr)
918{
919 struct hci_dev *hdev = sf->private;
920 struct hci_conn_params *p;
921
922 hci_dev_lock(hdev);
923
924 list_for_each_entry(p, &hdev->le_conn_params, list) {
925 seq_printf(sf, "%pMR %u %u\n", &p->addr, p->addr_type,
926 p->auto_connect);
927 }
928
929 hci_dev_unlock(hdev);
930
931 return 0;
932}
933
934static int le_auto_conn_open(struct inode *inode, struct file *file)
935{
936 return single_open(file, le_auto_conn_show, inode->i_private);
937}
938
939static ssize_t le_auto_conn_write(struct file *file, const char __user *data,
940 size_t count, loff_t *offset)
941{
942 struct seq_file *sf = file->private_data;
943 struct hci_dev *hdev = sf->private;
944 u8 auto_connect = 0;
945 bdaddr_t addr;
946 u8 addr_type;
947 char *buf;
948 int err = 0;
949 int n;
950
951 /* Don't allow partial write */
952 if (*offset != 0)
953 return -EINVAL;
954
955 if (count < 3)
956 return -EINVAL;
957
958 buf = kzalloc(count, GFP_KERNEL);
959 if (!buf)
960 return -ENOMEM;
961
962 if (copy_from_user(buf, data, count)) {
963 err = -EFAULT;
964 goto done;
965 }
966
967 if (memcmp(buf, "add", 3) == 0) {
968 n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu",
969 &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
970 &addr.b[1], &addr.b[0], &addr_type,
971 &auto_connect);
972
973 if (n < 7) {
974 err = -EINVAL;
975 goto done;
976 }
977
978 hci_dev_lock(hdev);
979 err = hci_conn_params_add(hdev, &addr, addr_type, auto_connect,
980 hdev->le_conn_min_interval,
981 hdev->le_conn_max_interval);
982 hci_dev_unlock(hdev);
983
984 if (err)
985 goto done;
986 } else if (memcmp(buf, "del", 3) == 0) {
987 n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
988 &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
989 &addr.b[1], &addr.b[0], &addr_type);
990
991 if (n < 7) {
992 err = -EINVAL;
993 goto done;
994 }
995
996 hci_dev_lock(hdev);
997 hci_conn_params_del(hdev, &addr, addr_type);
998 hci_dev_unlock(hdev);
999 } else if (memcmp(buf, "clr", 3) == 0) {
1000 hci_dev_lock(hdev);
1001 hci_conn_params_clear(hdev);
1002 hci_pend_le_conns_clear(hdev);
1003 hci_update_background_scan(hdev);
1004 hci_dev_unlock(hdev);
1005 } else {
1006 err = -EINVAL;
1007 }
1008
1009done:
1010 kfree(buf);
1011
1012 if (err)
1013 return err;
1014 else
1015 return count;
1016}
1017
1018static const struct file_operations le_auto_conn_fops = {
1019 .open = le_auto_conn_open,
1020 .read = seq_read,
1021 .write = le_auto_conn_write,
1022 .llseek = seq_lseek,
1023 .release = single_release,
1024};
1025
1da177e4
LT		 1026/* ---- HCI requests ---- */
1027
42c6b129 1028static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1da177e4 1029{
42c6b129 1030 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT		 1031
1032 if (hdev->req_status == HCI_REQ_PEND) {
1033 hdev->req_result = result;
1034 hdev->req_status = HCI_REQ_DONE;
1035 wake_up_interruptible(&hdev->req_wait_q);
1036 }
1037}
1038
1039static void hci_req_cancel(struct hci_dev *hdev, int err)
1040{
1041 BT_DBG("%s err 0x%2.2x", hdev->name, err);
1042
1043 if (hdev->req_status == HCI_REQ_PEND) {
1044 hdev->req_result = err;
1045 hdev->req_status = HCI_REQ_CANCELED;
1046 wake_up_interruptible(&hdev->req_wait_q);
1047 }
1048}
1049
77a63e0a
FW		 1050static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
1051 u8 event)
75e84b7c
JH		 1052{
1053 struct hci_ev_cmd_complete *ev;
1054 struct hci_event_hdr *hdr;
1055 struct sk_buff *skb;
1056
1057 hci_dev_lock(hdev);
1058
1059 skb = hdev->recv_evt;
1060 hdev->recv_evt = NULL;
1061
1062 hci_dev_unlock(hdev);
1063
1064 if (!skb)
1065 return ERR_PTR(-ENODATA);
1066
1067 if (skb->len < sizeof(*hdr)) {
1068 BT_ERR("Too short HCI event");
1069 goto failed;
1070 }
1071
1072 hdr = (void *) skb->data;
1073 skb_pull(skb, HCI_EVENT_HDR_SIZE);
1074
7b1abbbe
JH		 1075 if (event) {
1076 if (hdr->evt != event)
1077 goto failed;
1078 return skb;
1079 }
1080
75e84b7c
JH		 1081 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
1082 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
1083 goto failed;
1084 }
1085
1086 if (skb->len < sizeof(*ev)) {
1087 BT_ERR("Too short cmd_complete event");
1088 goto failed;
1089 }
1090
1091 ev = (void *) skb->data;
1092 skb_pull(skb, sizeof(*ev));
1093
1094 if (opcode == __le16_to_cpu(ev->opcode))
1095 return skb;
1096
1097 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
1098 __le16_to_cpu(ev->opcode));
1099
1100failed:
1101 kfree_skb(skb);
1102 return ERR_PTR(-ENODATA);
1103}
1104
7b1abbbe 1105struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 1106 const void *param, u8 event, u32 timeout)
75e84b7c
JH		 1107{
1108 DECLARE_WAITQUEUE(wait, current);
1109 struct hci_request req;
1110 int err = 0;
1111
1112 BT_DBG("%s", hdev->name);
1113
1114 hci_req_init(&req, hdev);
1115
7b1abbbe 1116 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH		 1117
1118 hdev->req_status = HCI_REQ_PEND;
1119
1120 err = hci_req_run(&req, hci_req_sync_complete);
1121 if (err < 0)
1122 return ERR_PTR(err);
1123
1124 add_wait_queue(&hdev->req_wait_q, &wait);
1125 set_current_state(TASK_INTERRUPTIBLE);
1126
1127 schedule_timeout(timeout);
1128
1129 remove_wait_queue(&hdev->req_wait_q, &wait);
1130
1131 if (signal_pending(current))
1132 return ERR_PTR(-EINTR);
1133
1134 switch (hdev->req_status) {
1135 case HCI_REQ_DONE:
1136 err = -bt_to_errno(hdev->req_result);
1137 break;
1138
1139 case HCI_REQ_CANCELED:
1140 err = -hdev->req_result;
1141 break;
1142
1143 default:
1144 err = -ETIMEDOUT;
1145 break;
1146 }
1147
1148 hdev->req_status = hdev->req_result = 0;
1149
1150 BT_DBG("%s end: err %d", hdev->name, err);
1151
1152 if (err < 0)
1153 return ERR_PTR(err);
1154
7b1abbbe
JH		 1155 return hci_get_cmd_complete(hdev, opcode, event);
1156}
1157EXPORT_SYMBOL(__hci_cmd_sync_ev);
1158
1159struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 1160 const void *param, u32 timeout)
7b1abbbe
JH		 1161{
1162 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH		 1163}
1164EXPORT_SYMBOL(__hci_cmd_sync);
1165
1da177e4 1166/* Execute request and wait for completion. */
01178cd4 1167static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 1168 void (*func)(struct hci_request *req,
1169 unsigned long opt),
01178cd4 1170 unsigned long opt, __u32 timeout)
1da177e4 1171{
42c6b129 1172 struct hci_request req;
1da177e4
LT		 1173 DECLARE_WAITQUEUE(wait, current);
1174 int err = 0;
1175
1176 BT_DBG("%s start", hdev->name);
1177
42c6b129
JH		 1178 hci_req_init(&req, hdev);
1179
1da177e4
LT		 1180 hdev->req_status = HCI_REQ_PEND;
1181
42c6b129 1182 func(&req, opt);
53cce22d 1183
42c6b129
JH		 1184 err = hci_req_run(&req, hci_req_sync_complete);
1185 if (err < 0) {
53cce22d 1186 hdev->req_status = 0;
920c8300
AG		 1187
1188 /* ENODATA means the HCI request command queue is empty.
1189 * This can happen when a request with conditionals doesn't
1190 * trigger any commands to be sent. This is normal behavior
1191 * and should not trigger an error return.
42c6b129 1192 */
920c8300
AG		 1193 if (err == -ENODATA)
1194 return 0;
1195
1196 return err;
53cce22d
JH		 1197 }
1198
bc4445c7
AG		 1199 add_wait_queue(&hdev->req_wait_q, &wait);
1200 set_current_state(TASK_INTERRUPTIBLE);
1201
1da177e4
LT		 1202 schedule_timeout(timeout);
1203
1204 remove_wait_queue(&hdev->req_wait_q, &wait);
1205
1206 if (signal_pending(current))
1207 return -EINTR;
1208
1209 switch (hdev->req_status) {
1210 case HCI_REQ_DONE:
e175072f 1211 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 1212 break;
1213
1214 case HCI_REQ_CANCELED:
1215 err = -hdev->req_result;
1216 break;
1217
1218 default:
1219 err = -ETIMEDOUT;
1220 break;
3ff50b79 1221 }
1da177e4 1222
a5040efa 1223 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 1224
1225 BT_DBG("%s end: err %d", hdev->name, err);
1226
1227 return err;
1228}
1229
01178cd4 1230static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 1231 void (*req)(struct hci_request *req,
1232 unsigned long opt),
01178cd4 1233 unsigned long opt, __u32 timeout)
1da177e4
LT		 1234{
1235 int ret;
1236
7c6a329e
MH		 1237 if (!test_bit(HCI_UP, &hdev->flags))
1238 return -ENETDOWN;
1239
1da177e4
LT		 1240 /* Serialize all requests */
1241 hci_req_lock(hdev);
01178cd4 1242 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 1243 hci_req_unlock(hdev);
1244
1245 return ret;
1246}
1247
42c6b129 1248static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 1249{
42c6b129 1250 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 1251
1252 /* Reset device */
42c6b129
JH		 1253 set_bit(HCI_RESET, &req->hdev->flags);
1254 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 1255}
1256
42c6b129 1257static void bredr_init(struct hci_request *req)
1da177e4 1258{
42c6b129 1259 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 1260
1da177e4 1261 /* Read Local Supported Features */
42c6b129 1262 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 1263
1143e5a6 1264 /* Read Local Version */
42c6b129 1265 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 1266
1267 /* Read BD Address */
42c6b129 1268 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 1269}
1270
42c6b129 1271static void amp_init(struct hci_request *req)
e61ef499 1272{
42c6b129 1273 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 1274
e61ef499 1275 /* Read Local Version */
42c6b129 1276 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489 1277
f6996cfe
MH		 1278 /* Read Local Supported Commands */
1279 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
1280
1281 /* Read Local Supported Features */
1282 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1283
6bcbc489 1284 /* Read Local AMP Info */
42c6b129 1285 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 1286
1287 /* Read Data Blk size */
42c6b129 1288 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
7528ca1c 1289
f38ba941
MH		 1290 /* Read Flow Control Mode */
1291 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
1292
7528ca1c
MH		 1293 /* Read Location Data */
1294 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
e61ef499
AE		 1295}
1296
42c6b129 1297static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 1298{
42c6b129 1299 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 1300
1301 BT_DBG("%s %ld", hdev->name, opt);
1302
11778716
AE		 1303 /* Reset */
1304 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 1305 hci_reset_req(req, 0);
11778716 1306
e61ef499
AE		 1307 switch (hdev->dev_type) {
1308 case HCI_BREDR:
42c6b129 1309 bredr_init(req);
e61ef499
AE		 1310 break;
1311
1312 case HCI_AMP:
42c6b129 1313 amp_init(req);
e61ef499
AE		 1314 break;
1315
1316 default:
1317 BT_ERR("Unknown device type %d", hdev->dev_type);
1318 break;
1319 }
e61ef499
AE		 1320}
1321
42c6b129 1322static void bredr_setup(struct hci_request *req)
2177bab5 1323{
4ca048e3
MH		 1324 struct hci_dev *hdev = req->hdev;
1325
2177bab5
JH		 1326 __le16 param;
1327 __u8 flt_type;
1328
1329 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 1330 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 1331
1332 /* Read Class of Device */
42c6b129 1333 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 1334
1335 /* Read Local Name */
42c6b129 1336 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 1337
1338 /* Read Voice Setting */
42c6b129 1339 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5 1340
b4cb9fb2
MH		 1341 /* Read Number of Supported IAC */
1342 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
1343
4b836f39
MH		 1344 /* Read Current IAC LAP */
1345 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
1346
2177bab5
JH		 1347 /* Clear Event Filters */
1348 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 1349 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 1350
1351 /* Connection accept timeout ~20 secs */
1352 param = __constant_cpu_to_le16(0x7d00);
42c6b129 1353 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 1354
4ca048e3
MH		 1355 /* AVM Berlin (31), aka "BlueFRITZ!", reports version 1.2,
1356 * but it does not support page scan related HCI commands.
1357 */
1358 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1) {
f332ec66
JH		 1359 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
1360 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
1361 }
2177bab5
JH		 1362}
1363
42c6b129 1364static void le_setup(struct hci_request *req)
2177bab5 1365{
c73eee91
JH		 1366 struct hci_dev *hdev = req->hdev;
1367
2177bab5 1368 /* Read LE Buffer Size */
42c6b129 1369 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 1370
1371 /* Read LE Local Supported Features */
42c6b129 1372 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5 1373
747d3f03
MH		 1374 /* Read LE Supported States */
1375 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
1376
2177bab5 1377 /* Read LE Advertising Channel TX Power */
42c6b129 1378 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH		 1379
1380 /* Read LE White List Size */
42c6b129 1381 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5 1382
747d3f03
MH		 1383 /* Clear LE White List */
1384 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
c73eee91
JH		 1385
1386 /* LE-only controllers have LE implicitly enabled */
1387 if (!lmp_bredr_capable(hdev))
1388 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 1389}
1390
1391static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
1392{
1393 if (lmp_ext_inq_capable(hdev))
1394 return 0x02;
1395
1396 if (lmp_inq_rssi_capable(hdev))
1397 return 0x01;
1398
1399 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
1400 hdev->lmp_subver == 0x0757)
1401 return 0x01;
1402
1403 if (hdev->manufacturer == 15) {
1404 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
1405 return 0x01;
1406 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
1407 return 0x01;
1408 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
1409 return 0x01;
1410 }
1411
1412 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
1413 hdev->lmp_subver == 0x1805)
1414 return 0x01;
1415
1416 return 0x00;
1417}
1418
42c6b129 1419static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 1420{
1421 u8 mode;
1422
42c6b129 1423 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 1424
42c6b129 1425 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 1426}
1427
42c6b129 1428static void hci_setup_event_mask(struct hci_request *req)
2177bab5 1429{
42c6b129
JH		 1430 struct hci_dev *hdev = req->hdev;
1431
2177bab5
JH		 1432 /* The second byte is 0xff instead of 0x9f (two reserved bits
1433 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
1434 * command otherwise.
1435 */
1436 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
1437
1438 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
1439 * any event mask for pre 1.2 devices.
1440 */
1441 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
1442 return;
1443
1444 if (lmp_bredr_capable(hdev)) {
1445 events[4] |= 0x01; /* Flow Specification Complete */
1446 events[4] |= 0x02; /* Inquiry Result with RSSI */
1447 events[4] |= 0x04; /* Read Remote Extended Features Complete */
1448 events[5] |= 0x08; /* Synchronous Connection Complete */
1449 events[5] |= 0x10; /* Synchronous Connection Changed */
c7882cbd
MH		 1450 } else {
1451 /* Use a different default for LE-only devices */
1452 memset(events, 0, sizeof(events));
1453 events[0] |= 0x10; /* Disconnection Complete */
1454 events[0] |= 0x80; /* Encryption Change */
1455 events[1] |= 0x08; /* Read Remote Version Information Complete */
1456 events[1] |= 0x20; /* Command Complete */
1457 events[1] |= 0x40; /* Command Status */
1458 events[1] |= 0x80; /* Hardware Error */
1459 events[2] |= 0x04; /* Number of Completed Packets */
1460 events[3] |= 0x02; /* Data Buffer Overflow */
1461 events[5] |= 0x80; /* Encryption Key Refresh Complete */
2177bab5
JH		 1462 }
1463
1464 if (lmp_inq_rssi_capable(hdev))
1465 events[4] |= 0x02; /* Inquiry Result with RSSI */
1466
1467 if (lmp_sniffsubr_capable(hdev))
1468 events[5] |= 0x20; /* Sniff Subrating */
1469
1470 if (lmp_pause_enc_capable(hdev))
1471 events[5] |= 0x80; /* Encryption Key Refresh Complete */
1472
1473 if (lmp_ext_inq_capable(hdev))
1474 events[5] |= 0x40; /* Extended Inquiry Result */
1475
1476 if (lmp_no_flush_capable(hdev))
1477 events[7] |= 0x01; /* Enhanced Flush Complete */
1478
1479 if (lmp_lsto_capable(hdev))
1480 events[6] |= 0x80; /* Link Supervision Timeout Changed */
1481
1482 if (lmp_ssp_capable(hdev)) {
1483 events[6] |= 0x01; /* IO Capability Request */
1484 events[6] |= 0x02; /* IO Capability Response */
1485 events[6] |= 0x04; /* User Confirmation Request */
1486 events[6] |= 0x08; /* User Passkey Request */
1487 events[6] |= 0x10; /* Remote OOB Data Request */
1488 events[6] |= 0x20; /* Simple Pairing Complete */
1489 events[7] |= 0x04; /* User Passkey Notification */
1490 events[7] |= 0x08; /* Keypress Notification */
1491 events[7] |= 0x10; /* Remote Host Supported
1492 * Features Notification
1493 */
1494 }
1495
1496 if (lmp_le_capable(hdev))
1497 events[7] |= 0x20; /* LE Meta-Event */
1498
42c6b129 1499 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 1500
1501 if (lmp_le_capable(hdev)) {
1502 memset(events, 0, sizeof(events));
1503 events[0] = 0x1f;
42c6b129
JH		 1504 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
1505 sizeof(events), events);
2177bab5
JH		 1506 }
1507}
1508
42c6b129 1509static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 1510{
42c6b129
JH		 1511 struct hci_dev *hdev = req->hdev;
1512
2177bab5 1513 if (lmp_bredr_capable(hdev))
42c6b129 1514 bredr_setup(req);
56f87901
JH		 1515 else
1516 clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2177bab5
JH		 1517
1518 if (lmp_le_capable(hdev))
42c6b129 1519 le_setup(req);
2177bab5 1520
42c6b129 1521 hci_setup_event_mask(req);
2177bab5 1522
3f8e2d75
JH		 1523 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
1524 * local supported commands HCI command.
1525 */
1526 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 1527 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 1528
1529 if (lmp_ssp_capable(hdev)) {
57af75a8
MH		 1530 /* When SSP is available, then the host features page
1531 * should also be available as well. However some
1532 * controllers list the max_page as 0 as long as SSP
1533 * has not been enabled. To achieve proper debugging
1534 * output, force the minimum max_page to 1 at least.
1535 */
1536 hdev->max_page = 0x01;
1537
2177bab5
JH		 1538 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
1539 u8 mode = 0x01;
42c6b129
JH		 1540 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
1541 sizeof(mode), &mode);
2177bab5
JH		 1542 } else {
1543 struct hci_cp_write_eir cp;
1544
1545 memset(hdev->eir, 0, sizeof(hdev->eir));
1546 memset(&cp, 0, sizeof(cp));
1547
42c6b129 1548 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 1549 }
1550 }
1551
1552 if (lmp_inq_rssi_capable(hdev))
42c6b129 1553 hci_setup_inquiry_mode(req);
2177bab5
JH		 1554
1555 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 1556 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 1557
1558 if (lmp_ext_feat_capable(hdev)) {
1559 struct hci_cp_read_local_ext_features cp;
1560
1561 cp.page = 0x01;
42c6b129
JH		 1562 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
1563 sizeof(cp), &cp);
2177bab5
JH		 1564 }
1565
1566 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
1567 u8 enable = 1;
42c6b129
JH		 1568 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
1569 &enable);
2177bab5
JH		 1570 }
1571}
1572
42c6b129 1573static void hci_setup_link_policy(struct hci_request *req)
2177bab5 1574{
42c6b129 1575 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 1576 struct hci_cp_write_def_link_policy cp;
1577 u16 link_policy = 0;
1578
1579 if (lmp_rswitch_capable(hdev))
1580 link_policy |= HCI_LP_RSWITCH;
1581 if (lmp_hold_capable(hdev))
1582 link_policy |= HCI_LP_HOLD;
1583 if (lmp_sniff_capable(hdev))
1584 link_policy |= HCI_LP_SNIFF;
1585 if (lmp_park_capable(hdev))
1586 link_policy |= HCI_LP_PARK;
1587
1588 cp.policy = cpu_to_le16(link_policy);
42c6b129 1589 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 1590}
1591
42c6b129 1592static void hci_set_le_support(struct hci_request *req)
2177bab5 1593{
42c6b129 1594 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 1595 struct hci_cp_write_le_host_supported cp;
1596
c73eee91
JH		 1597 /* LE-only devices do not support explicit enablement */
1598 if (!lmp_bredr_capable(hdev))
1599 return;
1600
2177bab5
JH		 1601 memset(&cp, 0, sizeof(cp));
1602
1603 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
1604 cp.le = 0x01;
1605 cp.simul = lmp_le_br_capable(hdev);
1606 }
1607
1608 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 1609 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
1610 &cp);
2177bab5
JH		 1611}
1612
d62e6d67
JH		 1613static void hci_set_event_mask_page_2(struct hci_request *req)
1614{
1615 struct hci_dev *hdev = req->hdev;
1616 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1617
1618 /* If Connectionless Slave Broadcast master role is supported
1619 * enable all necessary events for it.
1620 */
53b834d2 1621 if (lmp_csb_master_capable(hdev)) {
d62e6d67
JH		 1622 events[1] |= 0x40; /* Triggered Clock Capture */
1623 events[1] |= 0x80; /* Synchronization Train Complete */
1624 events[2] |= 0x10; /* Slave Page Response Timeout */
1625 events[2] |= 0x20; /* CSB Channel Map Change */
1626 }
1627
1628 /* If Connectionless Slave Broadcast slave role is supported
1629 * enable all necessary events for it.
1630 */
53b834d2 1631 if (lmp_csb_slave_capable(hdev)) {
d62e6d67
JH		 1632 events[2] |= 0x01; /* Synchronization Train Received */
1633 events[2] |= 0x02; /* CSB Receive */
1634 events[2] |= 0x04; /* CSB Timeout */
1635 events[2] |= 0x08; /* Truncated Page Complete */
1636 }
1637
40c59fcb
MH		 1638 /* Enable Authenticated Payload Timeout Expired event if supported */
1639 if (lmp_ping_capable(hdev))
1640 events[2] |= 0x80;
1641
d62e6d67
JH		 1642 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
1643}
1644
42c6b129 1645static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 1646{
42c6b129 1647 struct hci_dev *hdev = req->hdev;
d2c5d77f 1648 u8 p;
42c6b129 1649
b8f4e068
GP		 1650 /* Some Broadcom based Bluetooth controllers do not support the
1651 * Delete Stored Link Key command. They are clearly indicating its
1652 * absence in the bit mask of supported commands.
1653 *
1654 * Check the supported commands and only if the the command is marked
1655 * as supported send it. If not supported assume that the controller
1656 * does not have actual support for stored link keys which makes this
1657 * command redundant anyway.
f9f462fa
MH		 1658 *
1659 * Some controllers indicate that they support handling deleting
1660 * stored link keys, but they don't. The quirk lets a driver
1661 * just disable this command.
637b4cae 1662 */
f9f462fa
MH		 1663 if (hdev->commands[6] & 0x80 &&
1664 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
59f45d57
JH		 1665 struct hci_cp_delete_stored_link_key cp;
1666
1667 bacpy(&cp.bdaddr, BDADDR_ANY);
1668 cp.delete_all = 0x01;
1669 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
1670 sizeof(cp), &cp);
1671 }
1672
2177bab5 1673 if (hdev->commands[5] & 0x10)
42c6b129 1674 hci_setup_link_policy(req);
2177bab5 1675
7bf32048 1676 if (lmp_le_capable(hdev))
42c6b129 1677 hci_set_le_support(req);
d2c5d77f
JH		 1678
1679 /* Read features beyond page 1 if available */
1680 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
1681 struct hci_cp_read_local_ext_features cp;
1682
1683 cp.page = p;
1684 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
1685 sizeof(cp), &cp);
1686 }
2177bab5
JH		 1687}
1688
5d4e7e8d
JH		 1689static void hci_init4_req(struct hci_request *req, unsigned long opt)
1690{
1691 struct hci_dev *hdev = req->hdev;
1692
d62e6d67
JH		 1693 /* Set event mask page 2 if the HCI command for it is supported */
1694 if (hdev->commands[22] & 0x04)
1695 hci_set_event_mask_page_2(req);
1696
5d4e7e8d 1697 /* Check for Synchronization Train support */
53b834d2 1698 if (lmp_sync_train_capable(hdev))
5d4e7e8d 1699 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
a6d0d690
MH		 1700
1701 /* Enable Secure Connections if supported and configured */
5afeac14
MH		 1702 if ((lmp_sc_capable(hdev) ||
1703 test_bit(HCI_FORCE_SC, &hdev->dev_flags)) &&
a6d0d690
MH		 1704 test_bit(HCI_SC_ENABLED, &hdev->dev_flags)) {
1705 u8 support = 0x01;
1706 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
1707 sizeof(support), &support);
1708 }
5d4e7e8d
JH		 1709}
1710
2177bab5
JH		 1711static int __hci_init(struct hci_dev *hdev)
1712{
1713 int err;
1714
1715 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
1716 if (err < 0)
1717 return err;
1718
4b4148e9
MH		 1719 /* The Device Under Test (DUT) mode is special and available for
1720 * all controller types. So just create it early on.
1721 */
1722 if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
1723 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
1724 &dut_mode_fops);
1725 }
1726
2177bab5
JH		 1727 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
1728 * BR/EDR/LE type controllers. AMP controllers only need the
1729 * first stage init.
1730 */
1731 if (hdev->dev_type != HCI_BREDR)
1732 return 0;
1733
1734 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
1735 if (err < 0)
1736 return err;
1737
5d4e7e8d
JH		 1738 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
1739 if (err < 0)
1740 return err;
1741
baf27f6e
MH		 1742 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
1743 if (err < 0)
1744 return err;
1745
1746 /* Only create debugfs entries during the initial setup
1747 * phase and not every time the controller gets powered on.
1748 */
1749 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1750 return 0;
1751
dfb826a8
MH		 1752 debugfs_create_file("features", 0444, hdev->debugfs, hdev,
1753 &features_fops);
ceeb3bc0
MH		 1754 debugfs_create_u16("manufacturer", 0444, hdev->debugfs,
1755 &hdev->manufacturer);
1756 debugfs_create_u8("hci_version", 0444, hdev->debugfs, &hdev->hci_ver);
1757 debugfs_create_u16("hci_revision", 0444, hdev->debugfs, &hdev->hci_rev);
70afe0b8
MH		 1758 debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev,
1759 &blacklist_fops);
47219839
MH		 1760 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
1761
baf27f6e
MH		 1762 if (lmp_bredr_capable(hdev)) {
1763 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs,
1764 hdev, &inquiry_cache_fops);
02d08d15
MH		 1765 debugfs_create_file("link_keys", 0400, hdev->debugfs,
1766 hdev, &link_keys_fops);
babdbb3c
MH		 1767 debugfs_create_file("dev_class", 0444, hdev->debugfs,
1768 hdev, &dev_class_fops);
041000b9
MH		 1769 debugfs_create_file("voice_setting", 0444, hdev->debugfs,
1770 hdev, &voice_setting_fops);
baf27f6e
MH		 1771 }
1772
06f5b778 1773 if (lmp_ssp_capable(hdev)) {
ebd1e33b
MH		 1774 debugfs_create_file("auto_accept_delay", 0644, hdev->debugfs,
1775 hdev, &auto_accept_delay_fops);
06f5b778
MH		 1776 debugfs_create_file("ssp_debug_mode", 0644, hdev->debugfs,
1777 hdev, &ssp_debug_mode_fops);
5afeac14
MH		 1778 debugfs_create_file("force_sc_support", 0644, hdev->debugfs,
1779 hdev, &force_sc_support_fops);
134c2a89
MH		 1780 debugfs_create_file("sc_only_mode", 0444, hdev->debugfs,
1781 hdev, &sc_only_mode_fops);
06f5b778 1782 }
ebd1e33b 1783
2bfa3531
MH		 1784 if (lmp_sniff_capable(hdev)) {
1785 debugfs_create_file("idle_timeout", 0644, hdev->debugfs,
1786 hdev, &idle_timeout_fops);
1787 debugfs_create_file("sniff_min_interval", 0644, hdev->debugfs,
1788 hdev, &sniff_min_interval_fops);
1789 debugfs_create_file("sniff_max_interval", 0644, hdev->debugfs,
1790 hdev, &sniff_max_interval_fops);
1791 }
1792
d0f729b8 1793 if (lmp_le_capable(hdev)) {
ac345813
MH		 1794 debugfs_create_file("identity", 0400, hdev->debugfs,
1795 hdev, &identity_fops);
1796 debugfs_create_file("rpa_timeout", 0644, hdev->debugfs,
1797 hdev, &rpa_timeout_fops);
7a4cd51d
MH		 1798 debugfs_create_file("random_address", 0444, hdev->debugfs,
1799 hdev, &random_address_fops);
b32bba6c
MH		 1800 debugfs_create_file("static_address", 0444, hdev->debugfs,
1801 hdev, &static_address_fops);
1802
1803 /* For controllers with a public address, provide a debug
1804 * option to force the usage of the configured static
1805 * address. By default the public address is used.
1806 */
1807 if (bacmp(&hdev->bdaddr, BDADDR_ANY))
1808 debugfs_create_file("force_static_address", 0644,
1809 hdev->debugfs, hdev,
1810 &force_static_address_fops);
1811
d0f729b8
MH		 1812 debugfs_create_u8("white_list_size", 0444, hdev->debugfs,
1813 &hdev->le_white_list_size);
d2ab0ac1
MH		 1814 debugfs_create_file("white_list", 0444, hdev->debugfs, hdev,
1815 &white_list_fops);
3698d704
MH		 1816 debugfs_create_file("identity_resolving_keys", 0400,
1817 hdev->debugfs, hdev,
1818 &identity_resolving_keys_fops);
8f8625cd
MH		 1819 debugfs_create_file("long_term_keys", 0400, hdev->debugfs,
1820 hdev, &long_term_keys_fops);
4e70c7e7
MH		 1821 debugfs_create_file("conn_min_interval", 0644, hdev->debugfs,
1822 hdev, &conn_min_interval_fops);
1823 debugfs_create_file("conn_max_interval", 0644, hdev->debugfs,
1824 hdev, &conn_max_interval_fops);
3f959d46
MH		 1825 debugfs_create_file("adv_channel_map", 0644, hdev->debugfs,
1826 hdev, &adv_channel_map_fops);
89863109
JR		 1827 debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,
1828 &lowpan_debugfs_fops);
7d474e06
AG		 1829 debugfs_create_file("le_auto_conn", 0644, hdev->debugfs, hdev,
1830 &le_auto_conn_fops);
d0f729b8 1831 }
e7b8fc92 1832
baf27f6e 1833 return 0;
2177bab5
JH		 1834}
1835
42c6b129 1836static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1837{
1838 __u8 scan = opt;
1839
42c6b129 1840 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 1841
1842 /* Inquiry and Page scans */
42c6b129 1843 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 1844}
1845
42c6b129 1846static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1847{
1848 __u8 auth = opt;
1849
42c6b129 1850 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 1851
1852 /* Authentication */
42c6b129 1853 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 1854}
1855
42c6b129 1856static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1857{
1858 __u8 encrypt = opt;
1859
42c6b129 1860 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 1861
e4e8e37c 1862 /* Encryption */
42c6b129 1863 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 1864}
1865
42c6b129 1866static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 1867{
1868 __le16 policy = cpu_to_le16(opt);
1869
42c6b129 1870 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 1871
1872 /* Default link policy */
42c6b129 1873 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 1874}
1875
8e87d142 1876/* Get HCI device by index.
1da177e4
LT		 1877 * Device is held on return. */
1878struct hci_dev *hci_dev_get(int index)
1879{
8035ded4 1880 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 1881
1882 BT_DBG("%d", index);
1883
1884 if (index < 0)
1885 return NULL;
1886
1887 read_lock(&hci_dev_list_lock);
8035ded4 1888 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 1889 if (d->id == index) {
1890 hdev = hci_dev_hold(d);
1891 break;
1892 }
1893 }
1894 read_unlock(&hci_dev_list_lock);
1895 return hdev;
1896}
1da177e4
LT		 1897
1898/* ---- Inquiry support ---- */
ff9ef578 1899
30dc78e1
JH		 1900bool hci_discovery_active(struct hci_dev *hdev)
1901{
1902 struct discovery_state *discov = &hdev->discovery;
1903
6fbe195d 1904 switch (discov->state) {
343f935b 1905 case DISCOVERY_FINDING:
6fbe195d 1906 case DISCOVERY_RESOLVING:
30dc78e1
JH		 1907 return true;
1908
6fbe195d
AG		 1909 default:
1910 return false;
1911 }
30dc78e1
JH		 1912}
1913
ff9ef578
JH		 1914void hci_discovery_set_state(struct hci_dev *hdev, int state)
1915{
1916 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1917
1918 if (hdev->discovery.state == state)
1919 return;
1920
1921 switch (state) {
1922 case DISCOVERY_STOPPED:
c54c3860
AG		 1923 hci_update_background_scan(hdev);
1924
7b99b659
AG		 1925 if (hdev->discovery.state != DISCOVERY_STARTING)
1926 mgmt_discovering(hdev, 0);
ff9ef578
JH		 1927 break;
1928 case DISCOVERY_STARTING:
1929 break;
343f935b 1930 case DISCOVERY_FINDING:
ff9ef578
JH		 1931 mgmt_discovering(hdev, 1);
1932 break;
30dc78e1
JH		 1933 case DISCOVERY_RESOLVING:
1934 break;
ff9ef578
JH		 1935 case DISCOVERY_STOPPING:
1936 break;
1937 }
1938
1939 hdev->discovery.state = state;
1940}
1941
1f9b9a5d 1942void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 1943{
30883512 1944 struct discovery_state *cache = &hdev->discovery;
b57c1a56 1945 struct inquiry_entry *p, *n;
1da177e4 1946
561aafbc
JH		 1947 list_for_each_entry_safe(p, n, &cache->all, all) {
1948 list_del(&p->all);
b57c1a56 1949 kfree(p);
1da177e4 1950 }
561aafbc
JH		 1951
1952 INIT_LIST_HEAD(&cache->unknown);
1953 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 1954}
1955
a8c5fb1a
GP		 1956struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1957 bdaddr_t *bdaddr)
1da177e4 1958{
30883512 1959 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 1960 struct inquiry_entry *e;
1961
6ed93dc6 1962 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 1963
561aafbc
JH		 1964 list_for_each_entry(e, &cache->all, all) {
1965 if (!bacmp(&e->data.bdaddr, bdaddr))
1966 return e;
1967 }
1968
1969 return NULL;
1970}
1971
1972struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 1973 bdaddr_t *bdaddr)
561aafbc 1974{
30883512 1975 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 1976 struct inquiry_entry *e;
1977
6ed93dc6 1978 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 1979
1980 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 1981 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 1982 return e;
1983 }
1984
1985 return NULL;
1da177e4
LT		 1986}
1987
30dc78e1 1988struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 1989 bdaddr_t *bdaddr,
1990 int state)
30dc78e1
JH		 1991{
1992 struct discovery_state *cache = &hdev->discovery;
1993 struct inquiry_entry *e;
1994
6ed93dc6 1995 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 1996
1997 list_for_each_entry(e, &cache->resolve, list) {
1998 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1999 return e;
2000 if (!bacmp(&e->data.bdaddr, bdaddr))
2001 return e;
2002 }
2003
2004 return NULL;
2005}
2006
a3d4e20a 2007void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 2008 struct inquiry_entry *ie)
a3d4e20a
JH		 2009{
2010 struct discovery_state *cache = &hdev->discovery;
2011 struct list_head *pos = &cache->resolve;
2012 struct inquiry_entry *p;
2013
2014 list_del(&ie->list);
2015
2016 list_for_each_entry(p, &cache->resolve, list) {
2017 if (p->name_state != NAME_PENDING &&
a8c5fb1a 2018 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 2019 break;
2020 pos = &p->list;
2021 }
2022
2023 list_add(&ie->list, pos);
2024}
2025
3175405b 2026bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 2027 bool name_known, bool *ssp)
1da177e4 2028{
30883512 2029 struct discovery_state *cache = &hdev->discovery;
70f23020 2030 struct inquiry_entry *ie;
1da177e4 2031
6ed93dc6 2032 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 2033
2b2fec4d
SJ		 2034 hci_remove_remote_oob_data(hdev, &data->bdaddr);
2035
388fc8fa
JH		 2036 if (ssp)
2037 *ssp = data->ssp_mode;
2038
70f23020 2039 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 2040 if (ie) {
388fc8fa
JH		 2041 if (ie->data.ssp_mode && ssp)
2042 *ssp = true;
2043
a3d4e20a 2044 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 2045 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 2046 ie->data.rssi = data->rssi;
2047 hci_inquiry_cache_update_resolve(hdev, ie);
2048 }
2049
561aafbc 2050 goto update;
a3d4e20a 2051 }
561aafbc
JH		 2052
2053 /* Entry not in the cache. Add new one. */
2054 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
2055 if (!ie)
3175405b 2056 return false;
561aafbc
JH		 2057
2058 list_add(&ie->all, &cache->all);
2059
2060 if (name_known) {
2061 ie->name_state = NAME_KNOWN;
2062 } else {
2063 ie->name_state = NAME_NOT_KNOWN;
2064 list_add(&ie->list, &cache->unknown);
2065 }
70f23020 2066
561aafbc
JH		 2067update:
2068 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 2069 ie->name_state != NAME_PENDING) {
561aafbc
JH		 2070 ie->name_state = NAME_KNOWN;
2071 list_del(&ie->list);
1da177e4
LT		 2072 }
2073
70f23020
AE		 2074 memcpy(&ie->data, data, sizeof(*data));
2075 ie->timestamp = jiffies;
1da177e4 2076 cache->timestamp = jiffies;
3175405b
JH		 2077
2078 if (ie->name_state == NAME_NOT_KNOWN)
2079 return false;
2080
2081 return true;
1da177e4
LT		 2082}
2083
2084static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
2085{
30883512 2086 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 2087 struct inquiry_info *info = (struct inquiry_info *) buf;
2088 struct inquiry_entry *e;
2089 int copied = 0;
2090
561aafbc 2091 list_for_each_entry(e, &cache->all, all) {
1da177e4 2092 struct inquiry_data *data = &e->data;
b57c1a56
JH		 2093
2094 if (copied >= num)
2095 break;
2096
1da177e4
LT		 2097 bacpy(&info->bdaddr, &data->bdaddr);
2098 info->pscan_rep_mode = data->pscan_rep_mode;
2099 info->pscan_period_mode = data->pscan_period_mode;
2100 info->pscan_mode = data->pscan_mode;
2101 memcpy(info->dev_class, data->dev_class, 3);
2102 info->clock_offset = data->clock_offset;
b57c1a56 2103
1da177e4 2104 info++;
b57c1a56 2105 copied++;
1da177e4
LT		 2106 }
2107
2108 BT_DBG("cache %p, copied %d", cache, copied);
2109 return copied;
2110}
2111
42c6b129 2112static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 2113{
2114 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 2115 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 2116 struct hci_cp_inquiry cp;
2117
2118 BT_DBG("%s", hdev->name);
2119
2120 if (test_bit(HCI_INQUIRY, &hdev->flags))
2121 return;
2122
2123 /* Start Inquiry */
2124 memcpy(&cp.lap, &ir->lap, 3);
2125 cp.length = ir->length;
2126 cp.num_rsp = ir->num_rsp;
42c6b129 2127 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 2128}
2129
3e13fa1e
AG		 2130static int wait_inquiry(void *word)
2131{
2132 schedule();
2133 return signal_pending(current);
2134}
2135
1da177e4
LT		 2136int hci_inquiry(void __user *arg)
2137{
2138 __u8 __user *ptr = arg;
2139 struct hci_inquiry_req ir;
2140 struct hci_dev *hdev;
2141 int err = 0, do_inquiry = 0, max_rsp;
2142 long timeo;
2143 __u8 *buf;
2144
2145 if (copy_from_user(&ir, ptr, sizeof(ir)))
2146 return -EFAULT;
2147
5a08ecce
AE		 2148 hdev = hci_dev_get(ir.dev_id);
2149 if (!hdev)
1da177e4
LT		 2150 return -ENODEV;
2151
0736cfa8
MH		 2152 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2153 err = -EBUSY;
2154 goto done;
2155 }
2156
5b69bef5
MH		 2157 if (hdev->dev_type != HCI_BREDR) {
2158 err = -EOPNOTSUPP;
2159 goto done;
2160 }
2161
56f87901
JH		 2162 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
2163 err = -EOPNOTSUPP;
2164 goto done;
2165 }
2166
09fd0de5 2167 hci_dev_lock(hdev);
8e87d142 2168 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 2169 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 2170 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 2171 do_inquiry = 1;
2172 }
09fd0de5 2173 hci_dev_unlock(hdev);
1da177e4 2174
04837f64 2175 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 2176
2177 if (do_inquiry) {
01178cd4
JH		 2178 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
2179 timeo);
70f23020
AE		 2180 if (err < 0)
2181 goto done;
3e13fa1e
AG		 2182
2183 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
2184 * cleared). If it is interrupted by a signal, return -EINTR.
2185 */
2186 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
2187 TASK_INTERRUPTIBLE))
2188 return -EINTR;
70f23020 2189 }
1da177e4 2190
8fc9ced3
GP		 2191 /* for unlimited number of responses we will use buffer with
2192 * 255 entries
2193 */
1da177e4
LT		 2194 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
2195
2196 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
2197 * copy it to the user space.
2198 */
01df8c31 2199 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 2200 if (!buf) {
1da177e4
LT		 2201 err = -ENOMEM;
2202 goto done;
2203 }
2204
09fd0de5 2205 hci_dev_lock(hdev);
1da177e4 2206 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 2207 hci_dev_unlock(hdev);
1da177e4
LT		 2208
2209 BT_DBG("num_rsp %d", ir.num_rsp);
2210
2211 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
2212 ptr += sizeof(ir);
2213 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 2214 ir.num_rsp))
1da177e4 2215 err = -EFAULT;
8e87d142 2216 } else
1da177e4
LT		 2217 err = -EFAULT;
2218
2219 kfree(buf);
2220
2221done:
2222 hci_dev_put(hdev);
2223 return err;
2224}
2225
cbed0ca1 2226static int hci_dev_do_open(struct hci_dev *hdev)
1da177e4 2227{
1da177e4
LT		 2228 int ret = 0;
2229
1da177e4
LT		 2230 BT_DBG("%s %p", hdev->name, hdev);
2231
2232 hci_req_lock(hdev);
2233
94324962
JH		 2234 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
2235 ret = -ENODEV;
2236 goto done;
2237 }
2238
a5c8f270
MH		 2239 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
2240 /* Check for rfkill but allow the HCI setup stage to
2241 * proceed (which in itself doesn't cause any RF activity).
2242 */
2243 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
2244 ret = -ERFKILL;
2245 goto done;
2246 }
2247
2248 /* Check for valid public address or a configured static
2249 * random adddress, but let the HCI setup proceed to
2250 * be able to determine if there is a public address
2251 * or not.
2252 *
c6beca0e
MH		 2253 * In case of user channel usage, it is not important
2254 * if a public address or static random address is
2255 * available.
2256 *
a5c8f270
MH		 2257 * This check is only valid for BR/EDR controllers
2258 * since AMP controllers do not have an address.
2259 */
c6beca0e
MH		 2260 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
2261 hdev->dev_type == HCI_BREDR &&
a5c8f270
MH		 2262 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2263 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
2264 ret = -EADDRNOTAVAIL;
2265 goto done;
2266 }
611b30f7
MH		 2267 }
2268
1da177e4
LT		 2269 if (test_bit(HCI_UP, &hdev->flags)) {
2270 ret = -EALREADY;
2271 goto done;
2272 }
2273
1da177e4
LT		 2274 if (hdev->open(hdev)) {
2275 ret = -EIO;
2276 goto done;
2277 }
2278
f41c70c4
MH		 2279 atomic_set(&hdev->cmd_cnt, 1);
2280 set_bit(HCI_INIT, &hdev->flags);
2281
2282 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
2283 ret = hdev->setup(hdev);
2284
2285 if (!ret) {
f41c70c4
MH		 2286 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2287 set_bit(HCI_RAW, &hdev->flags);
2288
0736cfa8
MH		 2289 if (!test_bit(HCI_RAW, &hdev->flags) &&
2290 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
f41c70c4 2291 ret = __hci_init(hdev);
1da177e4
LT		 2292 }
2293
f41c70c4
MH		 2294 clear_bit(HCI_INIT, &hdev->flags);
2295
1da177e4
LT		 2296 if (!ret) {
2297 hci_dev_hold(hdev);
d6bfd59c 2298 set_bit(HCI_RPA_EXPIRED, &hdev->dev_flags);
1da177e4
LT		 2299 set_bit(HCI_UP, &hdev->flags);
2300 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a 2301 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
0736cfa8 2302 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1514b892 2303 hdev->dev_type == HCI_BREDR) {
09fd0de5 2304 hci_dev_lock(hdev);
744cf19e 2305 mgmt_powered(hdev, 1);
09fd0de5 2306 hci_dev_unlock(hdev);
56e5cb86 2307 }
8e87d142 2308 } else {
1da177e4 2309 /* Init failed, cleanup */
3eff45ea 2310 flush_work(&hdev->tx_work);
c347b765 2311 flush_work(&hdev->cmd_work);
b78752cc 2312 flush_work(&hdev->rx_work);
1da177e4
LT		 2313
2314 skb_queue_purge(&hdev->cmd_q);
2315 skb_queue_purge(&hdev->rx_q);
2316
2317 if (hdev->flush)
2318 hdev->flush(hdev);
2319
2320 if (hdev->sent_cmd) {
2321 kfree_skb(hdev->sent_cmd);
2322 hdev->sent_cmd = NULL;
2323 }
2324
2325 hdev->close(hdev);
2326 hdev->flags = 0;
2327 }
2328
2329done:
2330 hci_req_unlock(hdev);
1da177e4
LT		 2331 return ret;
2332}
2333
cbed0ca1
JH		 2334/* ---- HCI ioctl helpers ---- */
2335
2336int hci_dev_open(__u16 dev)
2337{
2338 struct hci_dev *hdev;
2339 int err;
2340
2341 hdev = hci_dev_get(dev);
2342 if (!hdev)
2343 return -ENODEV;
2344
e1d08f40
JH		 2345 /* We need to ensure that no other power on/off work is pending
2346 * before proceeding to call hci_dev_do_open. This is
2347 * particularly important if the setup procedure has not yet
2348 * completed.
2349 */
2350 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2351 cancel_delayed_work(&hdev->power_off);
2352
a5c8f270
MH		 2353 /* After this call it is guaranteed that the setup procedure
2354 * has finished. This means that error conditions like RFKILL
2355 * or no valid public or static random address apply.
2356 */
e1d08f40
JH		 2357 flush_workqueue(hdev->req_workqueue);
2358
cbed0ca1
JH		 2359 err = hci_dev_do_open(hdev);
2360
2361 hci_dev_put(hdev);
2362
2363 return err;
2364}
2365
1da177e4
LT		 2366static int hci_dev_do_close(struct hci_dev *hdev)
2367{
2368 BT_DBG("%s %p", hdev->name, hdev);
2369
78c04c0b
VCG		 2370 cancel_delayed_work(&hdev->power_off);
2371
1da177e4
LT		 2372 hci_req_cancel(hdev, ENODEV);
2373 hci_req_lock(hdev);
2374
2375 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 2376 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 2377 hci_req_unlock(hdev);
2378 return 0;
2379 }
2380
3eff45ea
GP		 2381 /* Flush RX and TX works */
2382 flush_work(&hdev->tx_work);
b78752cc 2383 flush_work(&hdev->rx_work);
1da177e4 2384
16ab91ab 2385 if (hdev->discov_timeout > 0) {
e0f9309f 2386 cancel_delayed_work(&hdev->discov_off);
16ab91ab 2387 hdev->discov_timeout = 0;
5e5282bb 2388 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
310a3d48 2389 clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 2390 }
2391
a8b2d5c2 2392 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 2393 cancel_delayed_work(&hdev->service_cache);
2394
7ba8b4be 2395 cancel_delayed_work_sync(&hdev->le_scan_disable);
4518bb0f
JH		 2396
2397 if (test_bit(HCI_MGMT, &hdev->dev_flags))
2398 cancel_delayed_work_sync(&hdev->rpa_expired);
7ba8b4be 2399
09fd0de5 2400 hci_dev_lock(hdev);
1f9b9a5d 2401 hci_inquiry_cache_flush(hdev);
1da177e4 2402 hci_conn_hash_flush(hdev);
6046dc3e 2403 hci_pend_le_conns_clear(hdev);
09fd0de5 2404 hci_dev_unlock(hdev);
1da177e4
LT		 2405
2406 hci_notify(hdev, HCI_DEV_DOWN);
2407
2408 if (hdev->flush)
2409 hdev->flush(hdev);
2410
2411 /* Reset device */
2412 skb_queue_purge(&hdev->cmd_q);
2413 atomic_set(&hdev->cmd_cnt, 1);
8af59467 2414 if (!test_bit(HCI_RAW, &hdev->flags) &&
3a6afbd2 2415 !test_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
a6c511c6 2416 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 2417 set_bit(HCI_INIT, &hdev->flags);
01178cd4 2418 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 2419 clear_bit(HCI_INIT, &hdev->flags);
2420 }
2421
c347b765
GP		 2422 /* flush cmd work */
2423 flush_work(&hdev->cmd_work);
1da177e4
LT		 2424
2425 /* Drop queues */
2426 skb_queue_purge(&hdev->rx_q);
2427 skb_queue_purge(&hdev->cmd_q);
2428 skb_queue_purge(&hdev->raw_q);
2429
2430 /* Drop last sent command */
2431 if (hdev->sent_cmd) {
b79f44c1 2432 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 2433 kfree_skb(hdev->sent_cmd);
2434 hdev->sent_cmd = NULL;
2435 }
2436
b6ddb638
JH		 2437 kfree_skb(hdev->recv_evt);
2438 hdev->recv_evt = NULL;
2439
1da177e4
LT		 2440 /* After this point our queues are empty
2441 * and no tasks are scheduled. */
2442 hdev->close(hdev);
2443
35b973c9
JH		 2444 /* Clear flags */
2445 hdev->flags = 0;
2446 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
2447
93c311a0
MH		 2448 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
2449 if (hdev->dev_type == HCI_BREDR) {
2450 hci_dev_lock(hdev);
2451 mgmt_powered(hdev, 0);
2452 hci_dev_unlock(hdev);
2453 }
8ee56540 2454 }
5add6af8 2455
ced5c338 2456 /* Controller radio is available but is currently powered down */
536619e8 2457 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 2458
e59fda8d 2459 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 2460 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
7a4cd51d 2461 bacpy(&hdev->random_addr, BDADDR_ANY);
e59fda8d 2462
1da177e4
LT		 2463 hci_req_unlock(hdev);
2464
2465 hci_dev_put(hdev);
2466 return 0;
2467}
2468
2469int hci_dev_close(__u16 dev)
2470{
2471 struct hci_dev *hdev;
2472 int err;
2473
70f23020
AE		 2474 hdev = hci_dev_get(dev);
2475 if (!hdev)
1da177e4 2476 return -ENODEV;
8ee56540 2477
0736cfa8
MH		 2478 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2479 err = -EBUSY;
2480 goto done;
2481 }
2482
8ee56540
MH		 2483 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2484 cancel_delayed_work(&hdev->power_off);
2485
1da177e4 2486 err = hci_dev_do_close(hdev);
8ee56540 2487
0736cfa8 2488done:
1da177e4
LT		 2489 hci_dev_put(hdev);
2490 return err;
2491}
2492
2493int hci_dev_reset(__u16 dev)
2494{
2495 struct hci_dev *hdev;
2496 int ret = 0;
2497
70f23020
AE		 2498 hdev = hci_dev_get(dev);
2499 if (!hdev)
1da177e4
LT		 2500 return -ENODEV;
2501
2502 hci_req_lock(hdev);
1da177e4 2503
808a049e
MH		 2504 if (!test_bit(HCI_UP, &hdev->flags)) {
2505 ret = -ENETDOWN;
1da177e4 2506 goto done;
808a049e 2507 }
1da177e4 2508
0736cfa8
MH		 2509 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2510 ret = -EBUSY;
2511 goto done;
2512 }
2513
1da177e4
LT		 2514 /* Drop queues */
2515 skb_queue_purge(&hdev->rx_q);
2516 skb_queue_purge(&hdev->cmd_q);
2517
09fd0de5 2518 hci_dev_lock(hdev);
1f9b9a5d 2519 hci_inquiry_cache_flush(hdev);
1da177e4 2520 hci_conn_hash_flush(hdev);
09fd0de5 2521 hci_dev_unlock(hdev);
1da177e4
LT		 2522
2523 if (hdev->flush)
2524 hdev->flush(hdev);
2525
8e87d142 2526 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 2527 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 2528
2529 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 2530 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 2531
2532done:
1da177e4
LT		 2533 hci_req_unlock(hdev);
2534 hci_dev_put(hdev);
2535 return ret;
2536}
2537
2538int hci_dev_reset_stat(__u16 dev)
2539{
2540 struct hci_dev *hdev;
2541 int ret = 0;
2542
70f23020
AE		 2543 hdev = hci_dev_get(dev);
2544 if (!hdev)
1da177e4
LT		 2545 return -ENODEV;
2546
0736cfa8
MH		 2547 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2548 ret = -EBUSY;
2549 goto done;
2550 }
2551
1da177e4
LT		 2552 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
2553
0736cfa8 2554done:
1da177e4 2555 hci_dev_put(hdev);
1da177e4
LT		 2556 return ret;
2557}
2558
2559int hci_dev_cmd(unsigned int cmd, void __user *arg)
2560{
2561 struct hci_dev *hdev;
2562 struct hci_dev_req dr;
2563 int err = 0;
2564
2565 if (copy_from_user(&dr, arg, sizeof(dr)))
2566 return -EFAULT;
2567
70f23020
AE		 2568 hdev = hci_dev_get(dr.dev_id);
2569 if (!hdev)
1da177e4
LT		 2570 return -ENODEV;
2571
0736cfa8
MH		 2572 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
2573 err = -EBUSY;
2574 goto done;
2575 }
2576
5b69bef5
MH		 2577 if (hdev->dev_type != HCI_BREDR) {
2578 err = -EOPNOTSUPP;
2579 goto done;
2580 }
2581
56f87901
JH		 2582 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
2583 err = -EOPNOTSUPP;
2584 goto done;
2585 }
2586
1da177e4
LT		 2587 switch (cmd) {
2588 case HCISETAUTH:
01178cd4
JH		 2589 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2590 HCI_INIT_TIMEOUT);
1da177e4
LT		 2591 break;
2592
2593 case HCISETENCRYPT:
2594 if (!lmp_encrypt_capable(hdev)) {
2595 err = -EOPNOTSUPP;
2596 break;
2597 }
2598
2599 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2600 /* Auth must be enabled first */
01178cd4
JH		 2601 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2602 HCI_INIT_TIMEOUT);
1da177e4
LT		 2603 if (err)
2604 break;
2605 }
2606
01178cd4
JH		 2607 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2608 HCI_INIT_TIMEOUT);
1da177e4
LT		 2609 break;
2610
2611 case HCISETSCAN:
01178cd4
JH		 2612 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2613 HCI_INIT_TIMEOUT);
1da177e4
LT		 2614 break;
2615
1da177e4 2616 case HCISETLINKPOL:
01178cd4
JH		 2617 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2618 HCI_INIT_TIMEOUT);
1da177e4
LT		 2619 break;
2620
2621 case HCISETLINKMODE:
e4e8e37c
MH		 2622 hdev->link_mode = ((__u16) dr.dev_opt) &
2623 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2624 break;
2625
2626 case HCISETPTYPE:
2627 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 2628 break;
2629
2630 case HCISETACLMTU:
e4e8e37c
MH		 2631 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2632 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 2633 break;
2634
2635 case HCISETSCOMTU:
e4e8e37c
MH		 2636 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2637 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 2638 break;
2639
2640 default:
2641 err = -EINVAL;
2642 break;
2643 }
e4e8e37c 2644
0736cfa8 2645done:
1da177e4
LT		 2646 hci_dev_put(hdev);
2647 return err;
2648}
2649
2650int hci_get_dev_list(void __user *arg)
2651{
8035ded4 2652 struct hci_dev *hdev;
1da177e4
LT		 2653 struct hci_dev_list_req *dl;
2654 struct hci_dev_req *dr;
1da177e4
LT		 2655 int n = 0, size, err;
2656 __u16 dev_num;
2657
2658 if (get_user(dev_num, (__u16 __user *) arg))
2659 return -EFAULT;
2660
2661 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2662 return -EINVAL;
2663
2664 size = sizeof(*dl) + dev_num * sizeof(*dr);
2665
70f23020
AE		 2666 dl = kzalloc(size, GFP_KERNEL);
2667 if (!dl)
1da177e4
LT		 2668 return -ENOMEM;
2669
2670 dr = dl->dev_req;
2671
f20d09d5 2672 read_lock(&hci_dev_list_lock);
8035ded4 2673 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 2674 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 2675 cancel_delayed_work(&hdev->power_off);
c542a06c 2676
a8b2d5c2
JH		 2677 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
2678 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 2679
1da177e4
LT		 2680 (dr + n)->dev_id = hdev->id;
2681 (dr + n)->dev_opt = hdev->flags;
c542a06c 2682
1da177e4
LT		 2683 if (++n >= dev_num)
2684 break;
2685 }
f20d09d5 2686 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 2687
2688 dl->dev_num = n;
2689 size = sizeof(*dl) + n * sizeof(*dr);
2690
2691 err = copy_to_user(arg, dl, size);
2692 kfree(dl);
2693
2694 return err ? -EFAULT : 0;
2695}
2696
2697int hci_get_dev_info(void __user *arg)
2698{
2699 struct hci_dev *hdev;
2700 struct hci_dev_info di;
2701 int err = 0;
2702
2703 if (copy_from_user(&di, arg, sizeof(di)))
2704 return -EFAULT;
2705
70f23020
AE		 2706 hdev = hci_dev_get(di.dev_id);
2707 if (!hdev)
1da177e4
LT		 2708 return -ENODEV;
2709
a8b2d5c2 2710 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 2711 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 2712
a8b2d5c2
JH		 2713 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
2714 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 2715
1da177e4
LT		 2716 strcpy(di.name, hdev->name);
2717 di.bdaddr = hdev->bdaddr;
60f2a3ed 2718 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
1da177e4
LT		 2719 di.flags = hdev->flags;
2720 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 2721 if (lmp_bredr_capable(hdev)) {
2722 di.acl_mtu = hdev->acl_mtu;
2723 di.acl_pkts = hdev->acl_pkts;
2724 di.sco_mtu = hdev->sco_mtu;
2725 di.sco_pkts = hdev->sco_pkts;
2726 } else {
2727 di.acl_mtu = hdev->le_mtu;
2728 di.acl_pkts = hdev->le_pkts;
2729 di.sco_mtu = 0;
2730 di.sco_pkts = 0;
2731 }
1da177e4
LT		 2732 di.link_policy = hdev->link_policy;
2733 di.link_mode = hdev->link_mode;
2734
2735 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2736 memcpy(&di.features, &hdev->features, sizeof(di.features));
2737
2738 if (copy_to_user(arg, &di, sizeof(di)))
2739 err = -EFAULT;
2740
2741 hci_dev_put(hdev);
2742
2743 return err;
2744}
2745
2746/* ---- Interface to HCI drivers ---- */
2747
611b30f7
MH		 2748static int hci_rfkill_set_block(void *data, bool blocked)
2749{
2750 struct hci_dev *hdev = data;
2751
2752 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2753
0736cfa8
MH		 2754 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
2755 return -EBUSY;
2756
5e130367
JH		 2757 if (blocked) {
2758 set_bit(HCI_RFKILLED, &hdev->dev_flags);
bf543036
JH		 2759 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
2760 hci_dev_do_close(hdev);
5e130367
JH		 2761 } else {
2762 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1025c04c 2763 }
611b30f7
MH		 2764
2765 return 0;
2766}
2767
2768static const struct rfkill_ops hci_rfkill_ops = {
2769 .set_block = hci_rfkill_set_block,
2770};
2771
ab81cbf9
JH		 2772static void hci_power_on(struct work_struct *work)
2773{
2774 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 2775 int err;
ab81cbf9
JH		 2776
2777 BT_DBG("%s", hdev->name);
2778
cbed0ca1 2779 err = hci_dev_do_open(hdev);
96570ffc
JH		 2780 if (err < 0) {
2781 mgmt_set_powered_failed(hdev, err);
ab81cbf9 2782 return;
96570ffc 2783 }
ab81cbf9 2784
a5c8f270
MH		 2785 /* During the HCI setup phase, a few error conditions are
2786 * ignored and they need to be checked now. If they are still
2787 * valid, it is important to turn the device back off.
2788 */
2789 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) ||
2790 (hdev->dev_type == HCI_BREDR &&
2791 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2792 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
bf543036
JH		 2793 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2794 hci_dev_do_close(hdev);
2795 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
19202573
JH		 2796 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2797 HCI_AUTO_OFF_TIMEOUT);
bf543036 2798 }
ab81cbf9 2799
a8b2d5c2 2800 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 2801 mgmt_index_added(hdev);
ab81cbf9
JH		 2802}
2803
2804static void hci_power_off(struct work_struct *work)
2805{
3243553f 2806 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 2807 power_off.work);
ab81cbf9
JH		 2808
2809 BT_DBG("%s", hdev->name);
2810
8ee56540 2811 hci_dev_do_close(hdev);
ab81cbf9
JH		 2812}
2813
16ab91ab
JH		 2814static void hci_discov_off(struct work_struct *work)
2815{
2816 struct hci_dev *hdev;
16ab91ab
JH		 2817
2818 hdev = container_of(work, struct hci_dev, discov_off.work);
2819
2820 BT_DBG("%s", hdev->name);
2821
d1967ff8 2822 mgmt_discoverable_timeout(hdev);
16ab91ab
JH		 2823}
2824
35f7498a 2825void hci_uuids_clear(struct hci_dev *hdev)
2aeb9a1a 2826{
4821002c 2827 struct bt_uuid *uuid, *tmp;
2aeb9a1a 2828
4821002c
JH		 2829 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2830 list_del(&uuid->list);
2aeb9a1a
JH		 2831 kfree(uuid);
2832 }
2aeb9a1a
JH		 2833}
2834
35f7498a 2835void hci_link_keys_clear(struct hci_dev *hdev)
55ed8ca1
JH		 2836{
2837 struct list_head *p, *n;
2838
2839 list_for_each_safe(p, n, &hdev->link_keys) {
2840 struct link_key *key;
2841
2842 key = list_entry(p, struct link_key, list);
2843
2844 list_del(p);
2845 kfree(key);
2846 }
55ed8ca1
JH		 2847}
2848
35f7498a 2849void hci_smp_ltks_clear(struct hci_dev *hdev)
b899efaf
VCG		 2850{
2851 struct smp_ltk *k, *tmp;
2852
2853 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
2854 list_del(&k->list);
2855 kfree(k);
2856 }
b899efaf
VCG		 2857}
2858
970c4e46
JH		 2859void hci_smp_irks_clear(struct hci_dev *hdev)
2860{
2861 struct smp_irk *k, *tmp;
2862
2863 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
2864 list_del(&k->list);
2865 kfree(k);
2866 }
2867}
2868
55ed8ca1
JH		 2869struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2870{
8035ded4 2871 struct link_key *k;
55ed8ca1 2872
8035ded4 2873 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 2874 if (bacmp(bdaddr, &k->bdaddr) == 0)
2875 return k;
55ed8ca1
JH		 2876
2877 return NULL;
2878}
2879
745c0ce3 2880static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 2881 u8 key_type, u8 old_key_type)
d25e28ab
JH		 2882{
2883 /* Legacy key */
2884 if (key_type < 0x03)
745c0ce3 2885 return true;
d25e28ab
JH		 2886
2887 /* Debug keys are insecure so don't store them persistently */
2888 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 2889 return false;
d25e28ab
JH		 2890
2891 /* Changed combination key and there's no previous one */
2892 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 2893 return false;
d25e28ab
JH		 2894
2895 /* Security mode 3 case */
2896 if (!conn)
745c0ce3 2897 return true;
d25e28ab
JH		 2898
2899 /* Neither local nor remote side had no-bonding as requirement */
2900 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 2901 return true;
d25e28ab
JH		 2902
2903 /* Local side had dedicated bonding as requirement */
2904 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 2905 return true;
d25e28ab
JH		 2906
2907 /* Remote side had dedicated bonding as requirement */
2908 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 2909 return true;
d25e28ab
JH		 2910
2911 /* If none of the above criteria match, then don't store the key
2912 * persistently */
745c0ce3 2913 return false;
d25e28ab
JH		 2914}
2915
98a0b845
JH		 2916static bool ltk_type_master(u8 type)
2917{
2918 if (type == HCI_SMP_STK || type == HCI_SMP_LTK)
2919 return true;
2920
2921 return false;
2922}
2923
fe39c7b2 2924struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, __le64 rand,
98a0b845 2925 bool master)
75d262c2 2926{
c9839a11 2927 struct smp_ltk *k;
75d262c2 2928
c9839a11 2929 list_for_each_entry(k, &hdev->long_term_keys, list) {
fe39c7b2 2930 if (k->ediv != ediv || k->rand != rand)
75d262c2
VCG		 2931 continue;
2932
98a0b845
JH		 2933 if (ltk_type_master(k->type) != master)
2934 continue;
2935
c9839a11 2936 return k;
75d262c2
VCG		 2937 }
2938
2939 return NULL;
2940}
75d262c2 2941
c9839a11 2942struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
98a0b845 2943 u8 addr_type, bool master)
75d262c2 2944{
c9839a11 2945 struct smp_ltk *k;
75d262c2 2946
c9839a11
VCG		 2947 list_for_each_entry(k, &hdev->long_term_keys, list)
2948 if (addr_type == k->bdaddr_type &&
98a0b845
JH		 2949 bacmp(bdaddr, &k->bdaddr) == 0 &&
2950 ltk_type_master(k->type) == master)
75d262c2
VCG		 2951 return k;
2952
2953 return NULL;
2954}
75d262c2 2955
970c4e46
JH		 2956struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2957{
2958 struct smp_irk *irk;
2959
2960 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
2961 if (!bacmp(&irk->rpa, rpa))
2962 return irk;
2963 }
2964
2965 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
2966 if (smp_irk_matches(hdev->tfm_aes, irk->val, rpa)) {
2967 bacpy(&irk->rpa, rpa);
2968 return irk;
2969 }
2970 }
2971
2972 return NULL;
2973}
2974
2975struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2976 u8 addr_type)
2977{
2978 struct smp_irk *irk;
2979
6cfc9988
JH		 2980 /* Identity Address must be public or static random */
2981 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2982 return NULL;
2983
970c4e46
JH		 2984 list_for_each_entry(irk, &hdev->identity_resolving_keys, list) {
2985 if (addr_type == irk->addr_type &&
2986 bacmp(bdaddr, &irk->bdaddr) == 0)
2987 return irk;
2988 }
2989
2990 return NULL;
2991}
2992
d25e28ab 2993int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 2994 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 2995{
2996 struct link_key *key, *old_key;
745c0ce3
VA		 2997 u8 old_key_type;
2998 bool persistent;
55ed8ca1
JH		 2999
3000 old_key = hci_find_link_key(hdev, bdaddr);
3001 if (old_key) {
3002 old_key_type = old_key->type;
3003 key = old_key;
3004 } else {
12adcf3a 3005 old_key_type = conn ? conn->key_type : 0xff;
0a14ab41 3006 key = kzalloc(sizeof(*key), GFP_KERNEL);
55ed8ca1
JH		 3007 if (!key)
3008 return -ENOMEM;
3009 list_add(&key->list, &hdev->link_keys);
3010 }
3011
6ed93dc6 3012 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 3013
d25e28ab
JH		 3014 /* Some buggy controller combinations generate a changed
3015 * combination key for legacy pairing even when there's no
3016 * previous key */
3017 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 3018 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 3019 type = HCI_LK_COMBINATION;
655fe6ec
JH		 3020 if (conn)
3021 conn->key_type = type;
3022 }
d25e28ab 3023
55ed8ca1 3024 bacpy(&key->bdaddr, bdaddr);
9b3b4460 3025 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 3026 key->pin_len = pin_len;
3027
b6020ba0 3028 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 3029 key->type = old_key_type;
4748fed2
JH		 3030 else
3031 key->type = type;
3032
4df378a1
JH		 3033 if (!new_key)
3034 return 0;
3035
3036 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
3037
744cf19e 3038 mgmt_new_link_key(hdev, key, persistent);
4df378a1 3039
6ec5bcad
VA		 3040 if (conn)
3041 conn->flush_key = !persistent;
55ed8ca1
JH		 3042
3043 return 0;
3044}
3045
ca9142b8 3046struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
35d70271 3047 u8 addr_type, u8 type, u8 authenticated,
fe39c7b2 3048 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
75d262c2 3049{
c9839a11 3050 struct smp_ltk *key, *old_key;
98a0b845 3051 bool master = ltk_type_master(type);
75d262c2 3052
98a0b845 3053 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type, master);
c9839a11 3054 if (old_key)
75d262c2 3055 key = old_key;
c9839a11 3056 else {
0a14ab41 3057 key = kzalloc(sizeof(*key), GFP_KERNEL);
75d262c2 3058 if (!key)
ca9142b8 3059 return NULL;
c9839a11 3060 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 3061 }
3062
75d262c2 3063 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 3064 key->bdaddr_type = addr_type;
3065 memcpy(key->val, tk, sizeof(key->val));
3066 key->authenticated = authenticated;
3067 key->ediv = ediv;
fe39c7b2 3068 key->rand = rand;
c9839a11
VCG		 3069 key->enc_size = enc_size;
3070 key->type = type;
75d262c2 3071
ca9142b8 3072 return key;
75d262c2
VCG		 3073}
3074
ca9142b8
JH		 3075struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
3076 u8 addr_type, u8 val[16], bdaddr_t *rpa)
970c4e46
JH		 3077{
3078 struct smp_irk *irk;
3079
3080 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
3081 if (!irk) {
3082 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
3083 if (!irk)
ca9142b8 3084 return NULL;
970c4e46
JH		 3085
3086 bacpy(&irk->bdaddr, bdaddr);
3087 irk->addr_type = addr_type;
3088
3089 list_add(&irk->list, &hdev->identity_resolving_keys);
3090 }
3091
3092 memcpy(irk->val, val, 16);
3093 bacpy(&irk->rpa, rpa);
3094
ca9142b8 3095 return irk;
970c4e46
JH		 3096}
3097
55ed8ca1
JH		 3098int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
3099{
3100 struct link_key *key;
3101
3102 key = hci_find_link_key(hdev, bdaddr);
3103 if (!key)
3104 return -ENOENT;
3105
6ed93dc6 3106 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 3107
3108 list_del(&key->list);
3109 kfree(key);
3110
3111 return 0;
3112}
3113
e0b2b27e 3114int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
b899efaf
VCG		 3115{
3116 struct smp_ltk *k, *tmp;
c51ffa0b 3117 int removed = 0;
b899efaf
VCG		 3118
3119 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
e0b2b27e 3120 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
b899efaf
VCG		 3121 continue;
3122
6ed93dc6 3123 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 3124
3125 list_del(&k->list);
3126 kfree(k);
c51ffa0b 3127 removed++;
b899efaf
VCG		 3128 }
3129
c51ffa0b 3130 return removed ? 0 : -ENOENT;
b899efaf
VCG		 3131}
3132
a7ec7338
JH		 3133void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
3134{
3135 struct smp_irk *k, *tmp;
3136
668b7b19 3137 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
a7ec7338
JH		 3138 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
3139 continue;
3140
3141 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
3142
3143 list_del(&k->list);
3144 kfree(k);
3145 }
3146}
3147
6bd32326 3148/* HCI command timer function */
bda4f23a 3149static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 3150{
3151 struct hci_dev *hdev = (void *) arg;
3152
bda4f23a
AE		 3153 if (hdev->sent_cmd) {
3154 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
3155 u16 opcode = __le16_to_cpu(sent->opcode);
3156
3157 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
3158 } else {
3159 BT_ERR("%s command tx timeout", hdev->name);
3160 }
3161
6bd32326 3162 atomic_set(&hdev->cmd_cnt, 1);
c347b765 3163 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 3164}
3165
2763eda6 3166struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 3167 bdaddr_t *bdaddr)
2763eda6
SJ		 3168{
3169 struct oob_data *data;
3170
3171 list_for_each_entry(data, &hdev->remote_oob_data, list)
3172 if (bacmp(bdaddr, &data->bdaddr) == 0)
3173 return data;
3174
3175 return NULL;
3176}
3177
3178int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
3179{
3180 struct oob_data *data;
3181
3182 data = hci_find_remote_oob_data(hdev, bdaddr);
3183 if (!data)
3184 return -ENOENT;
3185
6ed93dc6 3186 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 3187
3188 list_del(&data->list);
3189 kfree(data);
3190
3191 return 0;
3192}
3193
35f7498a 3194void hci_remote_oob_data_clear(struct hci_dev *hdev)
2763eda6
SJ		 3195{
3196 struct oob_data *data, *n;
3197
3198 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
3199 list_del(&data->list);
3200 kfree(data);
3201 }
2763eda6
SJ		 3202}
3203
0798872e
MH		 3204int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
3205 u8 *hash, u8 *randomizer)
2763eda6
SJ		 3206{
3207 struct oob_data *data;
3208
3209 data = hci_find_remote_oob_data(hdev, bdaddr);
2763eda6 3210 if (!data) {
0a14ab41 3211 data = kmalloc(sizeof(*data), GFP_KERNEL);
2763eda6
SJ		 3212 if (!data)
3213 return -ENOMEM;
3214
3215 bacpy(&data->bdaddr, bdaddr);
3216 list_add(&data->list, &hdev->remote_oob_data);
3217 }
3218
519ca9d0
MH		 3219 memcpy(data->hash192, hash, sizeof(data->hash192));
3220 memcpy(data->randomizer192, randomizer, sizeof(data->randomizer192));
2763eda6 3221
0798872e
MH		 3222 memset(data->hash256, 0, sizeof(data->hash256));
3223 memset(data->randomizer256, 0, sizeof(data->randomizer256));
3224
3225 BT_DBG("%s for %pMR", hdev->name, bdaddr);
3226
3227 return 0;
3228}
3229
3230int hci_add_remote_oob_ext_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
3231 u8 *hash192, u8 *randomizer192,
3232 u8 *hash256, u8 *randomizer256)
3233{
3234 struct oob_data *data;
3235
3236 data = hci_find_remote_oob_data(hdev, bdaddr);
3237 if (!data) {
0a14ab41 3238 data = kmalloc(sizeof(*data), GFP_KERNEL);
0798872e
MH		 3239 if (!data)
3240 return -ENOMEM;
3241
3242 bacpy(&data->bdaddr, bdaddr);
3243 list_add(&data->list, &hdev->remote_oob_data);
3244 }
3245
3246 memcpy(data->hash192, hash192, sizeof(data->hash192));
3247 memcpy(data->randomizer192, randomizer192, sizeof(data->randomizer192));
3248
3249 memcpy(data->hash256, hash256, sizeof(data->hash256));
3250 memcpy(data->randomizer256, randomizer256, sizeof(data->randomizer256));
3251
6ed93dc6 3252 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 3253
3254 return 0;
3255}
3256
b9ee0a78
MH		 3257struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
3258 bdaddr_t *bdaddr, u8 type)
b2a66aad 3259{
8035ded4 3260 struct bdaddr_list *b;
b2a66aad 3261
b9ee0a78
MH		 3262 list_for_each_entry(b, &hdev->blacklist, list) {
3263 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
b2a66aad 3264 return b;
b9ee0a78 3265 }
b2a66aad
AJ		 3266
3267 return NULL;
3268}
3269
c9507490 3270static void hci_blacklist_clear(struct hci_dev *hdev)
b2a66aad
AJ		 3271{
3272 struct list_head *p, *n;
3273
3274 list_for_each_safe(p, n, &hdev->blacklist) {
b9ee0a78 3275 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
b2a66aad
AJ		 3276
3277 list_del(p);
3278 kfree(b);
3279 }
b2a66aad
AJ		 3280}
3281
88c1fe4b 3282int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 3283{
3284 struct bdaddr_list *entry;
b2a66aad 3285
b9ee0a78 3286 if (!bacmp(bdaddr, BDADDR_ANY))
b2a66aad
AJ		 3287 return -EBADF;
3288
b9ee0a78 3289 if (hci_blacklist_lookup(hdev, bdaddr, type))
5e762444 3290 return -EEXIST;
b2a66aad
AJ		 3291
3292 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 3293 if (!entry)
3294 return -ENOMEM;
b2a66aad
AJ		 3295
3296 bacpy(&entry->bdaddr, bdaddr);
b9ee0a78 3297 entry->bdaddr_type = type;
b2a66aad
AJ		 3298
3299 list_add(&entry->list, &hdev->blacklist);
3300
88c1fe4b 3301 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 3302}
3303
88c1fe4b 3304int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 3305{
3306 struct bdaddr_list *entry;
b2a66aad 3307
35f7498a
JH		 3308 if (!bacmp(bdaddr, BDADDR_ANY)) {
3309 hci_blacklist_clear(hdev);
3310 return 0;
3311 }
b2a66aad 3312
b9ee0a78 3313 entry = hci_blacklist_lookup(hdev, bdaddr, type);
1ec918ce 3314 if (!entry)
5e762444 3315 return -ENOENT;
b2a66aad
AJ		 3316
3317 list_del(&entry->list);
3318 kfree(entry);
3319
88c1fe4b 3320 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 3321}
3322
d2ab0ac1
MH		 3323struct bdaddr_list *hci_white_list_lookup(struct hci_dev *hdev,
3324 bdaddr_t *bdaddr, u8 type)
3325{
3326 struct bdaddr_list *b;
3327
3328 list_for_each_entry(b, &hdev->le_white_list, list) {
3329 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3330 return b;
3331 }
3332
3333 return NULL;
3334}
3335
3336void hci_white_list_clear(struct hci_dev *hdev)
3337{
3338 struct list_head *p, *n;
3339
3340 list_for_each_safe(p, n, &hdev->le_white_list) {
3341 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
3342
3343 list_del(p);
3344 kfree(b);
3345 }
3346}
3347
3348int hci_white_list_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
3349{
3350 struct bdaddr_list *entry;
3351
3352 if (!bacmp(bdaddr, BDADDR_ANY))
3353 return -EBADF;
3354
3355 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
3356 if (!entry)
3357 return -ENOMEM;
3358
3359 bacpy(&entry->bdaddr, bdaddr);
3360 entry->bdaddr_type = type;
3361
3362 list_add(&entry->list, &hdev->le_white_list);
3363
3364 return 0;
3365}
3366
3367int hci_white_list_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
3368{
3369 struct bdaddr_list *entry;
3370
3371 if (!bacmp(bdaddr, BDADDR_ANY))
3372 return -EBADF;
3373
3374 entry = hci_white_list_lookup(hdev, bdaddr, type);
3375 if (!entry)
3376 return -ENOENT;
3377
3378 list_del(&entry->list);
3379 kfree(entry);
3380
3381 return 0;
3382}
3383
15819a70
AG		 3384/* This function requires the caller holds hdev->lock */
3385struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3386 bdaddr_t *addr, u8 addr_type)
3387{
3388 struct hci_conn_params *params;
3389
3390 list_for_each_entry(params, &hdev->le_conn_params, list) {
3391 if (bacmp(&params->addr, addr) == 0 &&
3392 params->addr_type == addr_type) {
3393 return params;
3394 }
3395 }
3396
3397 return NULL;
3398}
3399
cef952ce
AG		 3400static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
3401{
3402 struct hci_conn *conn;
3403
3404 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);
3405 if (!conn)
3406 return false;
3407
3408 if (conn->dst_type != type)
3409 return false;
3410
3411 if (conn->state != BT_CONNECTED)
3412 return false;
3413
3414 return true;
3415}
3416
a9b0a04c
AG		 3417static bool is_identity_address(bdaddr_t *addr, u8 addr_type)
3418{
3419 if (addr_type == ADDR_LE_DEV_PUBLIC)
3420 return true;
3421
3422 /* Check for Random Static address type */
3423 if ((addr->b[5] & 0xc0) == 0xc0)
3424 return true;
3425
3426 return false;
3427}
3428
15819a70 3429/* This function requires the caller holds hdev->lock */
a9b0a04c
AG		 3430int hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
3431 u8 auto_connect, u16 conn_min_interval,
3432 u16 conn_max_interval)
15819a70
AG		 3433{
3434 struct hci_conn_params *params;
3435
a9b0a04c
AG		 3436 if (!is_identity_address(addr, addr_type))
3437 return -EINVAL;
3438
15819a70 3439 params = hci_conn_params_lookup(hdev, addr, addr_type);
cef952ce
AG		 3440 if (params)
3441 goto update;
15819a70
AG		 3442
3443 params = kzalloc(sizeof(*params), GFP_KERNEL);
3444 if (!params) {
3445 BT_ERR("Out of memory");
a9b0a04c 3446 return -ENOMEM;
15819a70
AG		 3447 }
3448
3449 bacpy(&params->addr, addr);
3450 params->addr_type = addr_type;
cef952ce
AG		 3451
3452 list_add(&params->list, &hdev->le_conn_params);
3453
3454update:
15819a70
AG		 3455 params->conn_min_interval = conn_min_interval;
3456 params->conn_max_interval = conn_max_interval;
9fcb18ef 3457 params->auto_connect = auto_connect;
15819a70 3458
cef952ce
AG		 3459 switch (auto_connect) {
3460 case HCI_AUTO_CONN_DISABLED:
3461 case HCI_AUTO_CONN_LINK_LOSS:
3462 hci_pend_le_conn_del(hdev, addr, addr_type);
3463 break;
3464 case HCI_AUTO_CONN_ALWAYS:
3465 if (!is_connected(hdev, addr, addr_type))
3466 hci_pend_le_conn_add(hdev, addr, addr_type);
3467 break;
3468 }
15819a70 3469
9fcb18ef
AG		 3470 BT_DBG("addr %pMR (type %u) auto_connect %u conn_min_interval 0x%.4x "
3471 "conn_max_interval 0x%.4x", addr, addr_type, auto_connect,
3472 conn_min_interval, conn_max_interval);
a9b0a04c
AG		 3473
3474 return 0;
15819a70
AG		 3475}
3476
3477/* This function requires the caller holds hdev->lock */
3478void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3479{
3480 struct hci_conn_params *params;
3481
3482 params = hci_conn_params_lookup(hdev, addr, addr_type);
3483 if (!params)
3484 return;
3485
cef952ce
AG		 3486 hci_pend_le_conn_del(hdev, addr, addr_type);
3487
15819a70
AG		 3488 list_del(&params->list);
3489 kfree(params);
3490
3491 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3492}
3493
3494/* This function requires the caller holds hdev->lock */
3495void hci_conn_params_clear(struct hci_dev *hdev)
3496{
3497 struct hci_conn_params *params, *tmp;
3498
3499 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3500 list_del(&params->list);
3501 kfree(params);
3502 }
3503
3504 BT_DBG("All LE connection parameters were removed");
3505}
3506
77a77a30
AG		 3507/* This function requires the caller holds hdev->lock */
3508struct bdaddr_list *hci_pend_le_conn_lookup(struct hci_dev *hdev,
3509 bdaddr_t *addr, u8 addr_type)
3510{
3511 struct bdaddr_list *entry;
3512
3513 list_for_each_entry(entry, &hdev->pend_le_conns, list) {
3514 if (bacmp(&entry->bdaddr, addr) == 0 &&
3515 entry->bdaddr_type == addr_type)
3516 return entry;
3517 }
3518
3519 return NULL;
3520}
3521
3522/* This function requires the caller holds hdev->lock */
3523void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3524{
3525 struct bdaddr_list *entry;
3526
3527 entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
3528 if (entry)
a4790dbd 3529 goto done;
77a77a30
AG		 3530
3531 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3532 if (!entry) {
3533 BT_ERR("Out of memory");
3534 return;
3535 }
3536
3537 bacpy(&entry->bdaddr, addr);
3538 entry->bdaddr_type = addr_type;
3539
3540 list_add(&entry->list, &hdev->pend_le_conns);
3541
3542 BT_DBG("addr %pMR (type %u)", addr, addr_type);
a4790dbd
AG		 3543
3544done:
3545 hci_update_background_scan(hdev);
77a77a30
AG		 3546}
3547
3548/* This function requires the caller holds hdev->lock */
3549void hci_pend_le_conn_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3550{
3551 struct bdaddr_list *entry;
3552
3553 entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
3554 if (!entry)
a4790dbd 3555 goto done;
77a77a30
AG		 3556
3557 list_del(&entry->list);
3558 kfree(entry);
3559
3560 BT_DBG("addr %pMR (type %u)", addr, addr_type);
a4790dbd
AG		 3561
3562done:
3563 hci_update_background_scan(hdev);
77a77a30
AG		 3564}
3565
3566/* This function requires the caller holds hdev->lock */
3567void hci_pend_le_conns_clear(struct hci_dev *hdev)
3568{
3569 struct bdaddr_list *entry, *tmp;
3570
3571 list_for_each_entry_safe(entry, tmp, &hdev->pend_le_conns, list) {
3572 list_del(&entry->list);
3573 kfree(entry);
3574 }
3575
3576 BT_DBG("All LE pending connections cleared");
3577}
3578
4c87eaab 3579static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 3580{
4c87eaab
AG		 3581 if (status) {
3582 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 3583
4c87eaab
AG		 3584 hci_dev_lock(hdev);
3585 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3586 hci_dev_unlock(hdev);
3587 return;
3588 }
7ba8b4be
AG		 3589}
3590
4c87eaab 3591static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 3592{
4c87eaab
AG		 3593 /* General inquiry access code (GIAC) */
3594 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3595 struct hci_request req;
3596 struct hci_cp_inquiry cp;
7ba8b4be
AG		 3597 int err;
3598
4c87eaab
AG		 3599 if (status) {
3600 BT_ERR("Failed to disable LE scanning: status %d", status);
3601 return;
3602 }
7ba8b4be 3603
4c87eaab
AG		 3604 switch (hdev->discovery.type) {
3605 case DISCOV_TYPE_LE:
3606 hci_dev_lock(hdev);
3607 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3608 hci_dev_unlock(hdev);
3609 break;
7ba8b4be 3610
4c87eaab
AG		 3611 case DISCOV_TYPE_INTERLEAVED:
3612 hci_req_init(&req, hdev);
7ba8b4be 3613
4c87eaab
AG		 3614 memset(&cp, 0, sizeof(cp));
3615 memcpy(&cp.lap, lap, sizeof(cp.lap));
3616 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
3617 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 3618
4c87eaab 3619 hci_dev_lock(hdev);
7dbfac1d 3620
4c87eaab 3621 hci_inquiry_cache_flush(hdev);
7dbfac1d 3622
4c87eaab
AG		 3623 err = hci_req_run(&req, inquiry_complete);
3624 if (err) {
3625 BT_ERR("Inquiry request failed: err %d", err);
3626 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3627 }
7dbfac1d 3628
4c87eaab
AG		 3629 hci_dev_unlock(hdev);
3630 break;
7dbfac1d 3631 }
7dbfac1d
AG		 3632}
3633
7ba8b4be
AG		 3634static void le_scan_disable_work(struct work_struct *work)
3635{
3636 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 3637 le_scan_disable.work);
4c87eaab
AG		 3638 struct hci_request req;
3639 int err;
7ba8b4be
AG		 3640
3641 BT_DBG("%s", hdev->name);
3642
4c87eaab 3643 hci_req_init(&req, hdev);
28b75a89 3644
b1efcc28 3645 hci_req_add_le_scan_disable(&req);
28b75a89 3646
4c87eaab
AG		 3647 err = hci_req_run(&req, le_scan_disable_work_complete);
3648 if (err)
3649 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 3650}
3651
8d97250e
JH		 3652static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
3653{
3654 struct hci_dev *hdev = req->hdev;
3655
3656 /* If we're advertising or initiating an LE connection we can't
3657 * go ahead and change the random address at this time. This is
3658 * because the eventual initiator address used for the
3659 * subsequently created connection will be undefined (some
3660 * controllers use the new address and others the one we had
3661 * when the operation started).
3662 *
3663 * In this kind of scenario skip the update and let the random
3664 * address be updated at the next cycle.
3665 */
3666 if (test_bit(HCI_ADVERTISING, &hdev->dev_flags) ||
3667 hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT)) {
3668 BT_DBG("Deferring random address update");
3669 return;
3670 }
3671
3672 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa);
3673}
3674
94b1fc92
MH		 3675int hci_update_random_address(struct hci_request *req, bool require_privacy,
3676 u8 *own_addr_type)
ebd3a747
JH		 3677{
3678 struct hci_dev *hdev = req->hdev;
3679 int err;
3680
3681 /* If privacy is enabled use a resolvable private address. If
2b5224dc
MH		 3682 * current RPA has expired or there is something else than
3683 * the current RPA in use, then generate a new one.
ebd3a747
JH		 3684 */
3685 if (test_bit(HCI_PRIVACY, &hdev->dev_flags)) {
ebd3a747
JH		 3686 int to;
3687
3688 *own_addr_type = ADDR_LE_DEV_RANDOM;
3689
3690 if (!test_and_clear_bit(HCI_RPA_EXPIRED, &hdev->dev_flags) &&
2b5224dc 3691 !bacmp(&hdev->random_addr, &hdev->rpa))
ebd3a747
JH		 3692 return 0;
3693
2b5224dc 3694 err = smp_generate_rpa(hdev->tfm_aes, hdev->irk, &hdev->rpa);
ebd3a747
JH		 3695 if (err < 0) {
3696 BT_ERR("%s failed to generate new RPA", hdev->name);
3697 return err;
3698 }
3699
8d97250e 3700 set_random_addr(req, &hdev->rpa);
ebd3a747
JH		 3701
3702 to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
3703 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);
3704
3705 return 0;
94b1fc92
MH		 3706 }
3707
3708 /* In case of required privacy without resolvable private address,
3709 * use an unresolvable private address. This is useful for active
3710 * scanning and non-connectable advertising.
3711 */
3712 if (require_privacy) {
3713 bdaddr_t urpa;
3714
3715 get_random_bytes(&urpa, 6);
3716 urpa.b[5] &= 0x3f; /* Clear two most significant bits */
3717
3718 *own_addr_type = ADDR_LE_DEV_RANDOM;
8d97250e 3719 set_random_addr(req, &urpa);
94b1fc92 3720 return 0;
ebd3a747
JH		 3721 }
3722
3723 /* If forcing static address is in use or there is no public
3724 * address use the static address as random address (but skip
3725 * the HCI command if the current random address is already the
3726 * static one.
3727 */
3728 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ||
3729 !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
3730 *own_addr_type = ADDR_LE_DEV_RANDOM;
3731 if (bacmp(&hdev->static_addr, &hdev->random_addr))
3732 hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
3733 &hdev->static_addr);
3734 return 0;
3735 }
3736
3737 /* Neither privacy nor static address is being used so use a
3738 * public address.
3739 */
3740 *own_addr_type = ADDR_LE_DEV_PUBLIC;
3741
3742 return 0;
3743}
3744
a1f4c318
JH		 3745/* Copy the Identity Address of the controller.
3746 *
3747 * If the controller has a public BD_ADDR, then by default use that one.
3748 * If this is a LE only controller without a public address, default to
3749 * the static random address.
3750 *
3751 * For debugging purposes it is possible to force controllers with a
3752 * public address to use the static random address instead.
3753 */
3754void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3755 u8 *bdaddr_type)
3756{
3757 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ||
3758 !bacmp(&hdev->bdaddr, BDADDR_ANY)) {
3759 bacpy(bdaddr, &hdev->static_addr);
3760 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3761 } else {
3762 bacpy(bdaddr, &hdev->bdaddr);
3763 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3764 }
3765}
3766
9be0dab7
DH		 3767/* Alloc HCI device */
3768struct hci_dev *hci_alloc_dev(void)
3769{
3770 struct hci_dev *hdev;
3771
3772 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
3773 if (!hdev)
3774 return NULL;
3775
b1b813d4
DH		 3776 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3777 hdev->esco_type = (ESCO_HV1);
3778 hdev->link_mode = (HCI_LM_ACCEPT);
b4cb9fb2
MH		 3779 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3780 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 3781 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3782 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 3783
b1b813d4
DH		 3784 hdev->sniff_max_interval = 800;
3785 hdev->sniff_min_interval = 80;
3786
3f959d46 3787 hdev->le_adv_channel_map = 0x07;
bef64738
MH		 3788 hdev->le_scan_interval = 0x0060;
3789 hdev->le_scan_window = 0x0030;
4e70c7e7
MH		 3790 hdev->le_conn_min_interval = 0x0028;
3791 hdev->le_conn_max_interval = 0x0038;
bef64738 3792
d6bfd59c
JH		 3793 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3794
b1b813d4
DH		 3795 mutex_init(&hdev->lock);
3796 mutex_init(&hdev->req_lock);
3797
3798 INIT_LIST_HEAD(&hdev->mgmt_pending);
3799 INIT_LIST_HEAD(&hdev->blacklist);
3800 INIT_LIST_HEAD(&hdev->uuids);
3801 INIT_LIST_HEAD(&hdev->link_keys);
3802 INIT_LIST_HEAD(&hdev->long_term_keys);
970c4e46 3803 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
b1b813d4 3804 INIT_LIST_HEAD(&hdev->remote_oob_data);
d2ab0ac1 3805 INIT_LIST_HEAD(&hdev->le_white_list);
15819a70 3806 INIT_LIST_HEAD(&hdev->le_conn_params);
77a77a30 3807 INIT_LIST_HEAD(&hdev->pend_le_conns);
6b536b5e 3808 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 3809
3810 INIT_WORK(&hdev->rx_work, hci_rx_work);
3811 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3812 INIT_WORK(&hdev->tx_work, hci_tx_work);
3813 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 3814
b1b813d4
DH		 3815 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3816 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
3817 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3818
b1b813d4
DH		 3819 skb_queue_head_init(&hdev->rx_q);
3820 skb_queue_head_init(&hdev->cmd_q);
3821 skb_queue_head_init(&hdev->raw_q);
3822
3823 init_waitqueue_head(&hdev->req_wait_q);
3824
bda4f23a 3825 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 3826
b1b813d4
DH		 3827 hci_init_sysfs(hdev);
3828 discovery_init(hdev);
9be0dab7
DH		 3829
3830 return hdev;
3831}
3832EXPORT_SYMBOL(hci_alloc_dev);
3833
3834/* Free HCI device */
3835void hci_free_dev(struct hci_dev *hdev)
3836{
9be0dab7
DH		 3837 /* will free via device release */
3838 put_device(&hdev->dev);
3839}
3840EXPORT_SYMBOL(hci_free_dev);
3841
1da177e4
LT		 3842/* Register HCI device */
3843int hci_register_dev(struct hci_dev *hdev)
3844{
b1b813d4 3845 int id, error;
1da177e4 3846
010666a1 3847 if (!hdev->open || !hdev->close)
1da177e4
LT		 3848 return -EINVAL;
3849
08add513
MM		 3850 /* Do not allow HCI_AMP devices to register at index 0,
3851 * so the index can be used as the AMP controller ID.
3852 */
3df92b31
SL		 3853 switch (hdev->dev_type) {
3854 case HCI_BREDR:
3855 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3856 break;
3857 case HCI_AMP:
3858 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3859 break;
3860 default:
3861 return -EINVAL;
1da177e4 3862 }
8e87d142 3863
3df92b31
SL		 3864 if (id < 0)
3865 return id;
3866
1da177e4
LT		 3867 sprintf(hdev->name, "hci%d", id);
3868 hdev->id = id;
2d8b3a11
AE		 3869
3870 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3871
d8537548
KC		 3872 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3873 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 3874 if (!hdev->workqueue) {
3875 error = -ENOMEM;
3876 goto err;
3877 }
f48fd9c8 3878
d8537548
KC		 3879 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3880 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 3881 if (!hdev->req_workqueue) {
3882 destroy_workqueue(hdev->workqueue);
3883 error = -ENOMEM;
3884 goto err;
3885 }
3886
0153e2ec
MH		 3887 if (!IS_ERR_OR_NULL(bt_debugfs))
3888 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3889
bdc3e0f1
MH		 3890 dev_set_name(&hdev->dev, "%s", hdev->name);
3891
99780a7b
JH		 3892 hdev->tfm_aes = crypto_alloc_blkcipher("ecb(aes)", 0,
3893 CRYPTO_ALG_ASYNC);
3894 if (IS_ERR(hdev->tfm_aes)) {
3895 BT_ERR("Unable to create crypto context");
3896 error = PTR_ERR(hdev->tfm_aes);
3897 hdev->tfm_aes = NULL;
3898 goto err_wqueue;
3899 }
3900
bdc3e0f1 3901 error = device_add(&hdev->dev);
33ca954d 3902 if (error < 0)
99780a7b 3903 goto err_tfm;
1da177e4 3904
611b30f7 3905 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 3906 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3907 hdev);
611b30f7
MH		 3908 if (hdev->rfkill) {
3909 if (rfkill_register(hdev->rfkill) < 0) {
3910 rfkill_destroy(hdev->rfkill);
3911 hdev->rfkill = NULL;
3912 }
3913 }
3914
5e130367
JH		 3915 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3916 set_bit(HCI_RFKILLED, &hdev->dev_flags);
3917
a8b2d5c2 3918 set_bit(HCI_SETUP, &hdev->dev_flags);
004b0258 3919 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ce2be9ac 3920
01cd3404 3921 if (hdev->dev_type == HCI_BREDR) {
56f87901
JH		 3922 /* Assume BR/EDR support until proven otherwise (such as
3923 * through reading supported features during init.
3924 */
3925 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
3926 }
ce2be9ac 3927
fcee3377
GP		 3928 write_lock(&hci_dev_list_lock);
3929 list_add(&hdev->list, &hci_dev_list);
3930 write_unlock(&hci_dev_list_lock);
3931
1da177e4 3932 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 3933 hci_dev_hold(hdev);
1da177e4 3934
19202573 3935 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 3936
1da177e4 3937 return id;
f48fd9c8 3938
99780a7b
JH		 3939err_tfm:
3940 crypto_free_blkcipher(hdev->tfm_aes);
33ca954d
DH		 3941err_wqueue:
3942 destroy_workqueue(hdev->workqueue);
6ead1bbc 3943 destroy_workqueue(hdev->req_workqueue);
33ca954d 3944err:
3df92b31 3945 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 3946
33ca954d 3947 return error;
1da177e4
LT		 3948}
3949EXPORT_SYMBOL(hci_register_dev);
3950
3951/* Unregister HCI device */
59735631 3952void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 3953{
3df92b31 3954 int i, id;
ef222013 3955
c13854ce 3956 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 3957
94324962
JH		 3958 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
3959
3df92b31
SL		 3960 id = hdev->id;
3961
f20d09d5 3962 write_lock(&hci_dev_list_lock);
1da177e4 3963 list_del(&hdev->list);
f20d09d5 3964 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 3965
3966 hci_dev_do_close(hdev);
3967
cd4c5391 3968 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 3969 kfree_skb(hdev->reassembly[i]);
3970
b9b5ef18
GP		 3971 cancel_work_sync(&hdev->power_on);
3972
ab81cbf9 3973 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 3974 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 3975 hci_dev_lock(hdev);
744cf19e 3976 mgmt_index_removed(hdev);
09fd0de5 3977 hci_dev_unlock(hdev);
56e5cb86 3978 }
ab81cbf9 3979
2e58ef3e
JH		 3980 /* mgmt_index_removed should take care of emptying the
3981 * pending list */
3982 BUG_ON(!list_empty(&hdev->mgmt_pending));
3983
1da177e4
LT		 3984 hci_notify(hdev, HCI_DEV_UNREG);
3985
611b30f7
MH		 3986 if (hdev->rfkill) {
3987 rfkill_unregister(hdev->rfkill);
3988 rfkill_destroy(hdev->rfkill);
3989 }
3990
99780a7b
JH		 3991 if (hdev->tfm_aes)
3992 crypto_free_blkcipher(hdev->tfm_aes);
3993
bdc3e0f1 3994 device_del(&hdev->dev);
147e2d59 3995
0153e2ec
MH		 3996 debugfs_remove_recursive(hdev->debugfs);
3997
f48fd9c8 3998 destroy_workqueue(hdev->workqueue);
6ead1bbc 3999 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 4000
09fd0de5 4001 hci_dev_lock(hdev);
e2e0cacb 4002 hci_blacklist_clear(hdev);
2aeb9a1a 4003 hci_uuids_clear(hdev);
55ed8ca1 4004 hci_link_keys_clear(hdev);
b899efaf 4005 hci_smp_ltks_clear(hdev);
970c4e46 4006 hci_smp_irks_clear(hdev);
2763eda6 4007 hci_remote_oob_data_clear(hdev);
d2ab0ac1 4008 hci_white_list_clear(hdev);
15819a70 4009 hci_conn_params_clear(hdev);
77a77a30 4010 hci_pend_le_conns_clear(hdev);
09fd0de5 4011 hci_dev_unlock(hdev);
e2e0cacb 4012
dc946bd8 4013 hci_dev_put(hdev);
3df92b31
SL		 4014
4015 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 4016}
4017EXPORT_SYMBOL(hci_unregister_dev);
4018
4019/* Suspend HCI device */
4020int hci_suspend_dev(struct hci_dev *hdev)
4021{
4022 hci_notify(hdev, HCI_DEV_SUSPEND);
4023 return 0;
4024}
4025EXPORT_SYMBOL(hci_suspend_dev);
4026
4027/* Resume HCI device */
4028int hci_resume_dev(struct hci_dev *hdev)
4029{
4030 hci_notify(hdev, HCI_DEV_RESUME);
4031 return 0;
4032}
4033EXPORT_SYMBOL(hci_resume_dev);
4034
76bca880 4035/* Receive frame from HCI drivers */
e1a26170 4036int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 4037{
76bca880 4038 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 4039 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 4040 kfree_skb(skb);
4041 return -ENXIO;
4042 }
4043
d82603c6 4044 /* Incoming skb */
76bca880
MH		 4045 bt_cb(skb)->incoming = 1;
4046
4047 /* Time stamp */
4048 __net_timestamp(skb);
4049
76bca880 4050 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 4051 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 4052
76bca880
MH		 4053 return 0;
4054}
4055EXPORT_SYMBOL(hci_recv_frame);
4056
33e882a5 4057static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 4058 int count, __u8 index)
33e882a5
SS		 4059{
4060 int len = 0;
4061 int hlen = 0;
4062 int remain = count;
4063 struct sk_buff *skb;
4064 struct bt_skb_cb *scb;
4065
4066 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 4067 index >= NUM_REASSEMBLY)
33e882a5
SS		 4068 return -EILSEQ;
4069
4070 skb = hdev->reassembly[index];
4071
4072 if (!skb) {
4073 switch (type) {
4074 case HCI_ACLDATA_PKT:
4075 len = HCI_MAX_FRAME_SIZE;
4076 hlen = HCI_ACL_HDR_SIZE;
4077 break;
4078 case HCI_EVENT_PKT:
4079 len = HCI_MAX_EVENT_SIZE;
4080 hlen = HCI_EVENT_HDR_SIZE;
4081 break;
4082 case HCI_SCODATA_PKT:
4083 len = HCI_MAX_SCO_SIZE;
4084 hlen = HCI_SCO_HDR_SIZE;
4085 break;
4086 }
4087
1e429f38 4088 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 4089 if (!skb)
4090 return -ENOMEM;
4091
4092 scb = (void *) skb->cb;
4093 scb->expect = hlen;
4094 scb->pkt_type = type;
4095
33e882a5
SS		 4096 hdev->reassembly[index] = skb;
4097 }
4098
4099 while (count) {
4100 scb = (void *) skb->cb;
89bb46d0 4101 len = min_t(uint, scb->expect, count);
33e882a5
SS		 4102
4103 memcpy(skb_put(skb, len), data, len);
4104
4105 count -= len;
4106 data += len;
4107 scb->expect -= len;
4108 remain = count;
4109
4110 switch (type) {
4111 case HCI_EVENT_PKT:
4112 if (skb->len == HCI_EVENT_HDR_SIZE) {
4113 struct hci_event_hdr *h = hci_event_hdr(skb);
4114 scb->expect = h->plen;
4115
4116 if (skb_tailroom(skb) < scb->expect) {
4117 kfree_skb(skb);
4118 hdev->reassembly[index] = NULL;
4119 return -ENOMEM;
4120 }
4121 }
4122 break;
4123
4124 case HCI_ACLDATA_PKT:
4125 if (skb->len == HCI_ACL_HDR_SIZE) {
4126 struct hci_acl_hdr *h = hci_acl_hdr(skb);
4127 scb->expect = __le16_to_cpu(h->dlen);
4128
4129 if (skb_tailroom(skb) < scb->expect) {
4130 kfree_skb(skb);
4131 hdev->reassembly[index] = NULL;
4132 return -ENOMEM;
4133 }
4134 }
4135 break;
4136
4137 case HCI_SCODATA_PKT:
4138 if (skb->len == HCI_SCO_HDR_SIZE) {
4139 struct hci_sco_hdr *h = hci_sco_hdr(skb);
4140 scb->expect = h->dlen;
4141
4142 if (skb_tailroom(skb) < scb->expect) {
4143 kfree_skb(skb);
4144 hdev->reassembly[index] = NULL;
4145 return -ENOMEM;
4146 }
4147 }
4148 break;
4149 }
4150
4151 if (scb->expect == 0) {
4152 /* Complete frame */
4153
4154 bt_cb(skb)->pkt_type = type;
e1a26170 4155 hci_recv_frame(hdev, skb);
33e882a5
SS		 4156
4157 hdev->reassembly[index] = NULL;
4158 return remain;
4159 }
4160 }
4161
4162 return remain;
4163}
4164
ef222013
MH		 4165int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
4166{
f39a3c06
SS		 4167 int rem = 0;
4168
ef222013
MH		 4169 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
4170 return -EILSEQ;
4171
da5f6c37 4172 while (count) {
1e429f38 4173 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 4174 if (rem < 0)
4175 return rem;
ef222013 4176
f39a3c06
SS		 4177 data += (count - rem);
4178 count = rem;
f81c6224 4179 }
ef222013 4180
f39a3c06 4181 return rem;
ef222013
MH		 4182}
4183EXPORT_SYMBOL(hci_recv_fragment);
4184
99811510
SS		 4185#define STREAM_REASSEMBLY 0
4186
4187int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
4188{
4189 int type;
4190 int rem = 0;
4191
da5f6c37 4192 while (count) {
99811510
SS		 4193 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
4194
4195 if (!skb) {
4196 struct { char type; } *pkt;
4197
4198 /* Start of the frame */
4199 pkt = data;
4200 type = pkt->type;
4201
4202 data++;
4203 count--;
4204 } else
4205 type = bt_cb(skb)->pkt_type;
4206
1e429f38 4207 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 4208 STREAM_REASSEMBLY);
99811510
SS		 4209 if (rem < 0)
4210 return rem;
4211
4212 data += (count - rem);
4213 count = rem;
f81c6224 4214 }
99811510
SS		 4215
4216 return rem;
4217}
4218EXPORT_SYMBOL(hci_recv_stream_fragment);
4219
1da177e4
LT		 4220/* ---- Interface to upper protocols ---- */
4221
1da177e4
LT		 4222int hci_register_cb(struct hci_cb *cb)
4223{
4224 BT_DBG("%p name %s", cb, cb->name);
4225
f20d09d5 4226 write_lock(&hci_cb_list_lock);
1da177e4 4227 list_add(&cb->list, &hci_cb_list);
f20d09d5 4228 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 4229
4230 return 0;
4231}
4232EXPORT_SYMBOL(hci_register_cb);
4233
4234int hci_unregister_cb(struct hci_cb *cb)
4235{
4236 BT_DBG("%p name %s", cb, cb->name);
4237
f20d09d5 4238 write_lock(&hci_cb_list_lock);
1da177e4 4239 list_del(&cb->list);
f20d09d5 4240 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 4241
4242 return 0;
4243}
4244EXPORT_SYMBOL(hci_unregister_cb);
4245
51086991 4246static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 4247{
0d48d939 4248 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 4249
cd82e61c
MH		 4250 /* Time stamp */
4251 __net_timestamp(skb);
1da177e4 4252
cd82e61c
MH		 4253 /* Send copy to monitor */
4254 hci_send_to_monitor(hdev, skb);
4255
4256 if (atomic_read(&hdev->promisc)) {
4257 /* Send copy to the sockets */
470fe1b5 4258 hci_send_to_sock(hdev, skb);
1da177e4
LT		 4259 }
4260
4261 /* Get rid of skb owner, prior to sending to the driver. */
4262 skb_orphan(skb);
4263
7bd8f09f 4264 if (hdev->send(hdev, skb) < 0)
51086991 4265 BT_ERR("%s sending frame failed", hdev->name);
1da177e4
LT		 4266}
4267
3119ae95
JH		 4268void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
4269{
4270 skb_queue_head_init(&req->cmd_q);
4271 req->hdev = hdev;
5d73e034 4272 req->err = 0;
3119ae95
JH		 4273}
4274
4275int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
4276{
4277 struct hci_dev *hdev = req->hdev;
4278 struct sk_buff *skb;
4279 unsigned long flags;
4280
4281 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
4282
5d73e034
AG		 4283 /* If an error occured during request building, remove all HCI
4284 * commands queued on the HCI request queue.
4285 */
4286 if (req->err) {
4287 skb_queue_purge(&req->cmd_q);
4288 return req->err;
4289 }
4290
3119ae95
JH		 4291 /* Do not allow empty requests */
4292 if (skb_queue_empty(&req->cmd_q))
382b0c39 4293 return -ENODATA;
3119ae95
JH		 4294
4295 skb = skb_peek_tail(&req->cmd_q);
4296 bt_cb(skb)->req.complete = complete;
4297
4298 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4299 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
4300 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4301
4302 queue_work(hdev->workqueue, &hdev->cmd_work);
4303
4304 return 0;
4305}
4306
1ca3a9d0 4307static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 4308 u32 plen, const void *param)
1da177e4
LT		 4309{
4310 int len = HCI_COMMAND_HDR_SIZE + plen;
4311 struct hci_command_hdr *hdr;
4312 struct sk_buff *skb;
4313
1da177e4 4314 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 4315 if (!skb)
4316 return NULL;
1da177e4
LT		 4317
4318 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 4319 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 4320 hdr->plen = plen;
4321
4322 if (plen)
4323 memcpy(skb_put(skb, plen), param, plen);
4324
4325 BT_DBG("skb len %d", skb->len);
4326
0d48d939 4327 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
c78ae283 4328
1ca3a9d0
JH		 4329 return skb;
4330}
4331
4332/* Send HCI command */
07dc93dd
JH		 4333int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
4334 const void *param)
1ca3a9d0
JH		 4335{
4336 struct sk_buff *skb;
4337
4338 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4339
4340 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4341 if (!skb) {
4342 BT_ERR("%s no memory for command", hdev->name);
4343 return -ENOMEM;
4344 }
4345
11714b3d
JH		 4346 /* Stand-alone HCI commands must be flaged as
4347 * single-command requests.
4348 */
4349 bt_cb(skb)->req.start = true;
4350
1da177e4 4351 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 4352 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 4353
4354 return 0;
4355}
1da177e4 4356
71c76a17 4357/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 4358void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
4359 const void *param, u8 event)
71c76a17
JH		 4360{
4361 struct hci_dev *hdev = req->hdev;
4362 struct sk_buff *skb;
4363
4364 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4365
34739c1e
AG		 4366 /* If an error occured during request building, there is no point in
4367 * queueing the HCI command. We can simply return.
4368 */
4369 if (req->err)
4370 return;
4371
71c76a17
JH		 4372 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4373 if (!skb) {
5d73e034
AG		 4374 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
4375 hdev->name, opcode);
4376 req->err = -ENOMEM;
e348fe6b 4377 return;
71c76a17
JH		 4378 }
4379
4380 if (skb_queue_empty(&req->cmd_q))
4381 bt_cb(skb)->req.start = true;
4382
02350a72
JH		 4383 bt_cb(skb)->req.event = event;
4384
71c76a17 4385 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 4386}
4387
07dc93dd
JH		 4388void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
4389 const void *param)
02350a72
JH		 4390{
4391 hci_req_add_ev(req, opcode, plen, param, 0);
4392}
4393
1da177e4 4394/* Get data from the previously sent command */
a9de9248 4395void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 4396{
4397 struct hci_command_hdr *hdr;
4398
4399 if (!hdev->sent_cmd)
4400 return NULL;
4401
4402 hdr = (void *) hdev->sent_cmd->data;
4403
a9de9248 4404 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 4405 return NULL;
4406
f0e09510 4407 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 4408
4409 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
4410}
4411
4412/* Send ACL data */
4413static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
4414{
4415 struct hci_acl_hdr *hdr;
4416 int len = skb->len;
4417
badff6d0
ACM		 4418 skb_push(skb, HCI_ACL_HDR_SIZE);
4419 skb_reset_transport_header(skb);
9c70220b 4420 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 4421 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
4422 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 4423}
4424
ee22be7e 4425static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 4426 struct sk_buff *skb, __u16 flags)
1da177e4 4427{
ee22be7e 4428 struct hci_conn *conn = chan->conn;
1da177e4
LT		 4429 struct hci_dev *hdev = conn->hdev;
4430 struct sk_buff *list;
4431
087bfd99
GP		 4432 skb->len = skb_headlen(skb);
4433 skb->data_len = 0;
4434
4435 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 4436
4437 switch (hdev->dev_type) {
4438 case HCI_BREDR:
4439 hci_add_acl_hdr(skb, conn->handle, flags);
4440 break;
4441 case HCI_AMP:
4442 hci_add_acl_hdr(skb, chan->handle, flags);
4443 break;
4444 default:
4445 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
4446 return;
4447 }
087bfd99 4448
70f23020
AE		 4449 list = skb_shinfo(skb)->frag_list;
4450 if (!list) {
1da177e4
LT		 4451 /* Non fragmented */
4452 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
4453
73d80deb 4454 skb_queue_tail(queue, skb);
1da177e4
LT		 4455 } else {
4456 /* Fragmented */
4457 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4458
4459 skb_shinfo(skb)->frag_list = NULL;
4460
4461 /* Queue all fragments atomically */
af3e6359 4462 spin_lock(&queue->lock);
1da177e4 4463
73d80deb 4464 __skb_queue_tail(queue, skb);
e702112f
AE		 4465
4466 flags &= ~ACL_START;
4467 flags |= ACL_CONT;
1da177e4
LT		 4468 do {
4469 skb = list; list = list->next;
8e87d142 4470
0d48d939 4471 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 4472 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 4473
4474 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4475
73d80deb 4476 __skb_queue_tail(queue, skb);
1da177e4
LT		 4477 } while (list);
4478
af3e6359 4479 spin_unlock(&queue->lock);
1da177e4 4480 }
73d80deb
LAD		 4481}
4482
4483void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
4484{
ee22be7e 4485 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 4486
f0e09510 4487 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 4488
ee22be7e 4489 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 4490
3eff45ea 4491 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 4492}
1da177e4
LT		 4493
4494/* Send SCO data */
0d861d8b 4495void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 4496{
4497 struct hci_dev *hdev = conn->hdev;
4498 struct hci_sco_hdr hdr;
4499
4500 BT_DBG("%s len %d", hdev->name, skb->len);
4501
aca3192c 4502 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 4503 hdr.dlen = skb->len;
4504
badff6d0
ACM		 4505 skb_push(skb, HCI_SCO_HDR_SIZE);
4506 skb_reset_transport_header(skb);
9c70220b 4507 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 4508
0d48d939 4509 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 4510
1da177e4 4511 skb_queue_tail(&conn->data_q, skb);
3eff45ea 4512 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 4513}
1da177e4
LT		 4514
4515/* ---- HCI TX task (outgoing data) ---- */
4516
4517/* HCI Connection scheduler */
6039aa73
GP		 4518static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4519 int *quote)
1da177e4
LT		 4520{
4521 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 4522 struct hci_conn *conn = NULL, *c;
abc5de8f 4523 unsigned int num = 0, min = ~0;
1da177e4 4524
8e87d142 4525 /* We don't have to lock device here. Connections are always
1da177e4 4526 * added and removed with TX task disabled. */
bf4c6325
GP		 4527
4528 rcu_read_lock();
4529
4530 list_for_each_entry_rcu(c, &h->list, list) {
769be974 4531 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 4532 continue;
769be974
MH		 4533
4534 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4535 continue;
4536
1da177e4
LT		 4537 num++;
4538
4539 if (c->sent < min) {
4540 min = c->sent;
4541 conn = c;
4542 }
52087a79
LAD		 4543
4544 if (hci_conn_num(hdev, type) == num)
4545 break;
1da177e4
LT		 4546 }
4547
bf4c6325
GP		 4548 rcu_read_unlock();
4549
1da177e4 4550 if (conn) {
6ed58ec5
VT		 4551 int cnt, q;
4552
4553 switch (conn->type) {
4554 case ACL_LINK:
4555 cnt = hdev->acl_cnt;
4556 break;
4557 case SCO_LINK:
4558 case ESCO_LINK:
4559 cnt = hdev->sco_cnt;
4560 break;
4561 case LE_LINK:
4562 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4563 break;
4564 default:
4565 cnt = 0;
4566 BT_ERR("Unknown link type");
4567 }
4568
4569 q = cnt / num;
1da177e4
LT		 4570 *quote = q ? q : 1;
4571 } else
4572 *quote = 0;
4573
4574 BT_DBG("conn %p quote %d", conn, *quote);
4575 return conn;
4576}
4577
6039aa73 4578static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 4579{
4580 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 4581 struct hci_conn *c;
1da177e4 4582
bae1f5d9 4583 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 4584
bf4c6325
GP		 4585 rcu_read_lock();
4586
1da177e4 4587 /* Kill stalled connections */
bf4c6325 4588 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 4589 if (c->type == type && c->sent) {
6ed93dc6
AE		 4590 BT_ERR("%s killing stalled connection %pMR",
4591 hdev->name, &c->dst);
bed71748 4592 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 4593 }
4594 }
bf4c6325
GP		 4595
4596 rcu_read_unlock();
1da177e4
LT		 4597}
4598
6039aa73
GP		 4599static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4600 int *quote)
1da177e4 4601{
73d80deb
LAD		 4602 struct hci_conn_hash *h = &hdev->conn_hash;
4603 struct hci_chan *chan = NULL;
abc5de8f 4604 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 4605 struct hci_conn *conn;
73d80deb
LAD		 4606 int cnt, q, conn_num = 0;
4607
4608 BT_DBG("%s", hdev->name);
4609
bf4c6325
GP		 4610 rcu_read_lock();
4611
4612 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 4613 struct hci_chan *tmp;
4614
4615 if (conn->type != type)
4616 continue;
4617
4618 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4619 continue;
4620
4621 conn_num++;
4622
8192edef 4623 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 4624 struct sk_buff *skb;
4625
4626 if (skb_queue_empty(&tmp->data_q))
4627 continue;
4628
4629 skb = skb_peek(&tmp->data_q);
4630 if (skb->priority < cur_prio)
4631 continue;
4632
4633 if (skb->priority > cur_prio) {
4634 num = 0;
4635 min = ~0;
4636 cur_prio = skb->priority;
4637 }
4638
4639 num++;
4640
4641 if (conn->sent < min) {
4642 min = conn->sent;
4643 chan = tmp;
4644 }
4645 }
4646
4647 if (hci_conn_num(hdev, type) == conn_num)
4648 break;
4649 }
4650
bf4c6325
GP		 4651 rcu_read_unlock();
4652
73d80deb
LAD		 4653 if (!chan)
4654 return NULL;
4655
4656 switch (chan->conn->type) {
4657 case ACL_LINK:
4658 cnt = hdev->acl_cnt;
4659 break;
bd1eb66b
AE		 4660 case AMP_LINK:
4661 cnt = hdev->block_cnt;
4662 break;
73d80deb
LAD		 4663 case SCO_LINK:
4664 case ESCO_LINK:
4665 cnt = hdev->sco_cnt;
4666 break;
4667 case LE_LINK:
4668 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4669 break;
4670 default:
4671 cnt = 0;
4672 BT_ERR("Unknown link type");
4673 }
4674
4675 q = cnt / num;
4676 *quote = q ? q : 1;
4677 BT_DBG("chan %p quote %d", chan, *quote);
4678 return chan;
4679}
4680
02b20f0b
LAD		 4681static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4682{
4683 struct hci_conn_hash *h = &hdev->conn_hash;
4684 struct hci_conn *conn;
4685 int num = 0;
4686
4687 BT_DBG("%s", hdev->name);
4688
bf4c6325
GP		 4689 rcu_read_lock();
4690
4691 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 4692 struct hci_chan *chan;
4693
4694 if (conn->type != type)
4695 continue;
4696
4697 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4698 continue;
4699
4700 num++;
4701
8192edef 4702 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 4703 struct sk_buff *skb;
4704
4705 if (chan->sent) {
4706 chan->sent = 0;
4707 continue;
4708 }
4709
4710 if (skb_queue_empty(&chan->data_q))
4711 continue;
4712
4713 skb = skb_peek(&chan->data_q);
4714 if (skb->priority >= HCI_PRIO_MAX - 1)
4715 continue;
4716
4717 skb->priority = HCI_PRIO_MAX - 1;
4718
4719 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 4720 skb->priority);
02b20f0b
LAD		 4721 }
4722
4723 if (hci_conn_num(hdev, type) == num)
4724 break;
4725 }
bf4c6325
GP		 4726
4727 rcu_read_unlock();
4728
02b20f0b
LAD		 4729}
4730
b71d385a
AE		 4731static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4732{
4733 /* Calculate count of blocks used by this packet */
4734 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4735}
4736
6039aa73 4737static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 4738{
1da177e4
LT		 4739 if (!test_bit(HCI_RAW, &hdev->flags)) {
4740 /* ACL tx timeout must be longer than maximum
4741 * link supervision timeout (40.9 seconds) */
63d2bc1b 4742 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 4743 HCI_ACL_TX_TIMEOUT))
bae1f5d9 4744 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 4745 }
63d2bc1b 4746}
1da177e4 4747
6039aa73 4748static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 4749{
4750 unsigned int cnt = hdev->acl_cnt;
4751 struct hci_chan *chan;
4752 struct sk_buff *skb;
4753 int quote;
4754
4755 __check_timeout(hdev, cnt);
04837f64 4756
73d80deb 4757 while (hdev->acl_cnt &&
a8c5fb1a 4758 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 4759 u32 priority = (skb_peek(&chan->data_q))->priority;
4760 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 4761 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 4762 skb->len, skb->priority);
73d80deb 4763
ec1cce24
LAD		 4764 /* Stop if priority has changed */
4765 if (skb->priority < priority)
4766 break;
4767
4768 skb = skb_dequeue(&chan->data_q);
4769
73d80deb 4770 hci_conn_enter_active_mode(chan->conn,
04124681 4771 bt_cb(skb)->force_active);
04837f64 4772
57d17d70 4773 hci_send_frame(hdev, skb);
1da177e4
LT		 4774 hdev->acl_last_tx = jiffies;
4775
4776 hdev->acl_cnt--;
73d80deb
LAD		 4777 chan->sent++;
4778 chan->conn->sent++;
1da177e4
LT		 4779 }
4780 }
02b20f0b
LAD		 4781
4782 if (cnt != hdev->acl_cnt)
4783 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 4784}
4785
6039aa73 4786static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 4787{
63d2bc1b 4788 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 4789 struct hci_chan *chan;
4790 struct sk_buff *skb;
4791 int quote;
bd1eb66b 4792 u8 type;
b71d385a 4793
63d2bc1b 4794 __check_timeout(hdev, cnt);
b71d385a 4795
bd1eb66b
AE		 4796 BT_DBG("%s", hdev->name);
4797
4798 if (hdev->dev_type == HCI_AMP)
4799 type = AMP_LINK;
4800 else
4801 type = ACL_LINK;
4802
b71d385a 4803 while (hdev->block_cnt > 0 &&
bd1eb66b 4804 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 4805 u32 priority = (skb_peek(&chan->data_q))->priority;
4806 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4807 int blocks;
4808
4809 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 4810 skb->len, skb->priority);
b71d385a
AE		 4811
4812 /* Stop if priority has changed */
4813 if (skb->priority < priority)
4814 break;
4815
4816 skb = skb_dequeue(&chan->data_q);
4817
4818 blocks = __get_blocks(hdev, skb);
4819 if (blocks > hdev->block_cnt)
4820 return;
4821
4822 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 4823 bt_cb(skb)->force_active);
b71d385a 4824
57d17d70 4825 hci_send_frame(hdev, skb);
b71d385a
AE		 4826 hdev->acl_last_tx = jiffies;
4827
4828 hdev->block_cnt -= blocks;
4829 quote -= blocks;
4830
4831 chan->sent += blocks;
4832 chan->conn->sent += blocks;
4833 }
4834 }
4835
4836 if (cnt != hdev->block_cnt)
bd1eb66b 4837 hci_prio_recalculate(hdev, type);
b71d385a
AE		 4838}
4839
6039aa73 4840static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 4841{
4842 BT_DBG("%s", hdev->name);
4843
bd1eb66b
AE		 4844 /* No ACL link over BR/EDR controller */
4845 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
4846 return;
4847
4848 /* No AMP link over AMP controller */
4849 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 4850 return;
4851
4852 switch (hdev->flow_ctl_mode) {
4853 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4854 hci_sched_acl_pkt(hdev);
4855 break;
4856
4857 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4858 hci_sched_acl_blk(hdev);
4859 break;
4860 }
4861}
4862
1da177e4 4863/* Schedule SCO */
6039aa73 4864static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 4865{
4866 struct hci_conn *conn;
4867 struct sk_buff *skb;
4868 int quote;
4869
4870 BT_DBG("%s", hdev->name);
4871
52087a79
LAD		 4872 if (!hci_conn_num(hdev, SCO_LINK))
4873 return;
4874
1da177e4
LT		 4875 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
4876 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4877 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 4878 hci_send_frame(hdev, skb);
1da177e4
LT		 4879
4880 conn->sent++;
4881 if (conn->sent == ~0)
4882 conn->sent = 0;
4883 }
4884 }
4885}
4886
6039aa73 4887static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 4888{
4889 struct hci_conn *conn;
4890 struct sk_buff *skb;
4891 int quote;
4892
4893 BT_DBG("%s", hdev->name);
4894
52087a79
LAD		 4895 if (!hci_conn_num(hdev, ESCO_LINK))
4896 return;
4897
8fc9ced3
GP		 4898 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4899 &quote))) {
b6a0dc82
MH		 4900 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4901 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 4902 hci_send_frame(hdev, skb);
b6a0dc82
MH		 4903
4904 conn->sent++;
4905 if (conn->sent == ~0)
4906 conn->sent = 0;
4907 }
4908 }
4909}
4910
6039aa73 4911static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 4912{
73d80deb 4913 struct hci_chan *chan;
6ed58ec5 4914 struct sk_buff *skb;
02b20f0b 4915 int quote, cnt, tmp;
6ed58ec5
VT		 4916
4917 BT_DBG("%s", hdev->name);
4918
52087a79
LAD		 4919 if (!hci_conn_num(hdev, LE_LINK))
4920 return;
4921
6ed58ec5
VT		 4922 if (!test_bit(HCI_RAW, &hdev->flags)) {
4923 /* LE tx timeout must be longer than maximum
4924 * link supervision timeout (40.9 seconds) */
bae1f5d9 4925 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 4926 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 4927 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 4928 }
4929
4930 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 4931 tmp = cnt;
73d80deb 4932 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 4933 u32 priority = (skb_peek(&chan->data_q))->priority;
4934 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 4935 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 4936 skb->len, skb->priority);
6ed58ec5 4937
ec1cce24
LAD		 4938 /* Stop if priority has changed */
4939 if (skb->priority < priority)
4940 break;
4941
4942 skb = skb_dequeue(&chan->data_q);
4943
57d17d70 4944 hci_send_frame(hdev, skb);
6ed58ec5
VT		 4945 hdev->le_last_tx = jiffies;
4946
4947 cnt--;
73d80deb
LAD		 4948 chan->sent++;
4949 chan->conn->sent++;
6ed58ec5
VT		 4950 }
4951 }
73d80deb 4952
6ed58ec5
VT		 4953 if (hdev->le_pkts)
4954 hdev->le_cnt = cnt;
4955 else
4956 hdev->acl_cnt = cnt;
02b20f0b
LAD		 4957
4958 if (cnt != tmp)
4959 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 4960}
4961
3eff45ea 4962static void hci_tx_work(struct work_struct *work)
1da177e4 4963{
3eff45ea 4964 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 4965 struct sk_buff *skb;
4966
6ed58ec5 4967 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 4968 hdev->sco_cnt, hdev->le_cnt);
1da177e4 4969
52de599e
MH		 4970 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
4971 /* Schedule queues and send stuff to HCI driver */
4972 hci_sched_acl(hdev);
4973 hci_sched_sco(hdev);
4974 hci_sched_esco(hdev);
4975 hci_sched_le(hdev);
4976 }
6ed58ec5 4977
1da177e4
LT		 4978 /* Send next queued raw (unknown type) packet */
4979 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 4980 hci_send_frame(hdev, skb);
1da177e4
LT		 4981}
4982
25985edc 4983/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 4984
4985/* ACL data packet */
6039aa73 4986static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 4987{
4988 struct hci_acl_hdr *hdr = (void *) skb->data;
4989 struct hci_conn *conn;
4990 __u16 handle, flags;
4991
4992 skb_pull(skb, HCI_ACL_HDR_SIZE);
4993
4994 handle = __le16_to_cpu(hdr->handle);
4995 flags = hci_flags(handle);
4996 handle = hci_handle(handle);
4997
f0e09510 4998 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 4999 handle, flags);
1da177e4
LT		 5000
5001 hdev->stat.acl_rx++;
5002
5003 hci_dev_lock(hdev);
5004 conn = hci_conn_hash_lookup_handle(hdev, handle);
5005 hci_dev_unlock(hdev);
8e87d142 5006
1da177e4 5007 if (conn) {
65983fc7 5008 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 5009
1da177e4 5010 /* Send to upper protocol */
686ebf28
UF		 5011 l2cap_recv_acldata(conn, skb, flags);
5012 return;
1da177e4 5013 } else {
8e87d142 5014 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 5015 hdev->name, handle);
1da177e4
LT		 5016 }
5017
5018 kfree_skb(skb);
5019}
5020
5021/* SCO data packet */
6039aa73 5022static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 5023{
5024 struct hci_sco_hdr *hdr = (void *) skb->data;
5025 struct hci_conn *conn;
5026 __u16 handle;
5027
5028 skb_pull(skb, HCI_SCO_HDR_SIZE);
5029
5030 handle = __le16_to_cpu(hdr->handle);
5031
f0e09510 5032 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 5033
5034 hdev->stat.sco_rx++;
5035
5036 hci_dev_lock(hdev);
5037 conn = hci_conn_hash_lookup_handle(hdev, handle);
5038 hci_dev_unlock(hdev);
5039
5040 if (conn) {
1da177e4 5041 /* Send to upper protocol */
686ebf28
UF		 5042 sco_recv_scodata(conn, skb);
5043 return;
1da177e4 5044 } else {
8e87d142 5045 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 5046 hdev->name, handle);
1da177e4
LT		 5047 }
5048
5049 kfree_skb(skb);
5050}
5051
9238f36a
JH		 5052static bool hci_req_is_complete(struct hci_dev *hdev)
5053{
5054 struct sk_buff *skb;
5055
5056 skb = skb_peek(&hdev->cmd_q);
5057 if (!skb)
5058 return true;
5059
5060 return bt_cb(skb)->req.start;
5061}
5062
42c6b129
JH		 5063static void hci_resend_last(struct hci_dev *hdev)
5064{
5065 struct hci_command_hdr *sent;
5066 struct sk_buff *skb;
5067 u16 opcode;
5068
5069 if (!hdev->sent_cmd)
5070 return;
5071
5072 sent = (void *) hdev->sent_cmd->data;
5073 opcode = __le16_to_cpu(sent->opcode);
5074 if (opcode == HCI_OP_RESET)
5075 return;
5076
5077 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
5078 if (!skb)
5079 return;
5080
5081 skb_queue_head(&hdev->cmd_q, skb);
5082 queue_work(hdev->workqueue, &hdev->cmd_work);
5083}
5084
9238f36a
JH		 5085void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
5086{
5087 hci_req_complete_t req_complete = NULL;
5088 struct sk_buff *skb;
5089 unsigned long flags;
5090
5091 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
5092
42c6b129
JH		 5093 /* If the completed command doesn't match the last one that was
5094 * sent we need to do special handling of it.
9238f36a 5095 */
42c6b129
JH		 5096 if (!hci_sent_cmd_data(hdev, opcode)) {
5097 /* Some CSR based controllers generate a spontaneous
5098 * reset complete event during init and any pending
5099 * command will never be completed. In such a case we
5100 * need to resend whatever was the last sent
5101 * command.
5102 */
5103 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
5104 hci_resend_last(hdev);
5105
9238f36a 5106 return;
42c6b129 5107 }
9238f36a
JH		 5108
5109 /* If the command succeeded and there's still more commands in
5110 * this request the request is not yet complete.
5111 */
5112 if (!status && !hci_req_is_complete(hdev))
5113 return;
5114
5115 /* If this was the last command in a request the complete
5116 * callback would be found in hdev->sent_cmd instead of the
5117 * command queue (hdev->cmd_q).
5118 */
5119 if (hdev->sent_cmd) {
5120 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 5121
5122 if (req_complete) {
5123 /* We must set the complete callback to NULL to
5124 * avoid calling the callback more than once if
5125 * this function gets called again.
5126 */
5127 bt_cb(hdev->sent_cmd)->req.complete = NULL;
5128
9238f36a 5129 goto call_complete;
53e21fbc 5130 }
9238f36a
JH		 5131 }
5132
5133 /* Remove all pending commands belonging to this request */
5134 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
5135 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
5136 if (bt_cb(skb)->req.start) {
5137 __skb_queue_head(&hdev->cmd_q, skb);
5138 break;
5139 }
5140
5141 req_complete = bt_cb(skb)->req.complete;
5142 kfree_skb(skb);
5143 }
5144 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
5145
5146call_complete:
5147 if (req_complete)
5148 req_complete(hdev, status);
5149}
5150
b78752cc 5151static void hci_rx_work(struct work_struct *work)
1da177e4 5152{
b78752cc 5153 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 5154 struct sk_buff *skb;
5155
5156 BT_DBG("%s", hdev->name);
5157
1da177e4 5158 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 5159 /* Send copy to monitor */
5160 hci_send_to_monitor(hdev, skb);
5161
1da177e4
LT		 5162 if (atomic_read(&hdev->promisc)) {
5163 /* Send copy to the sockets */
470fe1b5 5164 hci_send_to_sock(hdev, skb);
1da177e4
LT		 5165 }
5166
0736cfa8
MH		 5167 if (test_bit(HCI_RAW, &hdev->flags) ||
5168 test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1da177e4
LT		 5169 kfree_skb(skb);
5170 continue;
5171 }
5172
5173 if (test_bit(HCI_INIT, &hdev->flags)) {
5174 /* Don't process data packets in this states. */
0d48d939 5175 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 5176 case HCI_ACLDATA_PKT:
5177 case HCI_SCODATA_PKT:
5178 kfree_skb(skb);
5179 continue;
3ff50b79 5180 }
1da177e4
LT		 5181 }
5182
5183 /* Process frame */
0d48d939 5184 switch (bt_cb(skb)->pkt_type) {
1da177e4 5185 case HCI_EVENT_PKT:
b78752cc 5186 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 5187 hci_event_packet(hdev, skb);
5188 break;
5189
5190 case HCI_ACLDATA_PKT:
5191 BT_DBG("%s ACL data packet", hdev->name);
5192 hci_acldata_packet(hdev, skb);
5193 break;
5194
5195 case HCI_SCODATA_PKT:
5196 BT_DBG("%s SCO data packet", hdev->name);
5197 hci_scodata_packet(hdev, skb);
5198 break;
5199
5200 default:
5201 kfree_skb(skb);
5202 break;
5203 }
5204 }
1da177e4
LT		 5205}
5206
c347b765 5207static void hci_cmd_work(struct work_struct *work)
1da177e4 5208{
c347b765 5209 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 5210 struct sk_buff *skb;
5211
2104786b
AE		 5212 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
5213 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 5214
1da177e4 5215 /* Send queued commands */
5a08ecce
AE		 5216 if (atomic_read(&hdev->cmd_cnt)) {
5217 skb = skb_dequeue(&hdev->cmd_q);
5218 if (!skb)
5219 return;
5220
7585b97a 5221 kfree_skb(hdev->sent_cmd);
1da177e4 5222
a675d7f1 5223 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 5224 if (hdev->sent_cmd) {
1da177e4 5225 atomic_dec(&hdev->cmd_cnt);
57d17d70 5226 hci_send_frame(hdev, skb);
7bdb8a5c
SJ		 5227 if (test_bit(HCI_RESET, &hdev->flags))
5228 del_timer(&hdev->cmd_timer);
5229 else
5230 mod_timer(&hdev->cmd_timer,
5f246e89 5231 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 5232 } else {
5233 skb_queue_head(&hdev->cmd_q, skb);
c347b765 5234 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 5235 }
5236 }
5237}
b1efcc28
AG		 5238
5239void hci_req_add_le_scan_disable(struct hci_request *req)
5240{
5241 struct hci_cp_le_set_scan_enable cp;
5242
5243 memset(&cp, 0, sizeof(cp));
5244 cp.enable = LE_SCAN_DISABLE;
5245 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
5246}
a4790dbd 5247
8ef30fd3
AG		 5248void hci_req_add_le_passive_scan(struct hci_request *req)
5249{
5250 struct hci_cp_le_set_scan_param param_cp;
5251 struct hci_cp_le_set_scan_enable enable_cp;
5252 struct hci_dev *hdev = req->hdev;
5253 u8 own_addr_type;
5254
5255 /* Set require_privacy to true to avoid identification from
5256 * unknown peer devices. Since this is passive scanning, no
5257 * SCAN_REQ using the local identity should be sent. Mandating
5258 * privacy is just an extra precaution.
5259 */
5260 if (hci_update_random_address(req, true, &own_addr_type))
5261 return;
5262
5263 memset(&param_cp, 0, sizeof(param_cp));
5264 param_cp.type = LE_SCAN_PASSIVE;
5265 param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
5266 param_cp.window = cpu_to_le16(hdev->le_scan_window);
5267 param_cp.own_address_type = own_addr_type;
5268 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
5269 &param_cp);
5270
5271 memset(&enable_cp, 0, sizeof(enable_cp));
5272 enable_cp.enable = LE_SCAN_ENABLE;
4340a124 5273 enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
8ef30fd3
AG		 5274 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
5275 &enable_cp);
5276}
5277
a4790dbd
AG		 5278static void update_background_scan_complete(struct hci_dev *hdev, u8 status)
5279{
5280 if (status)
5281 BT_DBG("HCI request failed to update background scanning: "
5282 "status 0x%2.2x", status);
5283}
5284
5285/* This function controls the background scanning based on hdev->pend_le_conns
5286 * list. If there are pending LE connection we start the background scanning,
5287 * otherwise we stop it.
5288 *
5289 * This function requires the caller holds hdev->lock.
5290 */
5291void hci_update_background_scan(struct hci_dev *hdev)
5292{
a4790dbd
AG		 5293 struct hci_request req;
5294 struct hci_conn *conn;
5295 int err;
5296
5297 hci_req_init(&req, hdev);
5298
5299 if (list_empty(&hdev->pend_le_conns)) {
5300 /* If there is no pending LE connections, we should stop
5301 * the background scanning.
5302 */
5303
5304 /* If controller is not scanning we are done. */
5305 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
5306 return;
5307
5308 hci_req_add_le_scan_disable(&req);
5309
5310 BT_DBG("%s stopping background scanning", hdev->name);
5311 } else {
a4790dbd
AG		 5312 /* If there is at least one pending LE connection, we should
5313 * keep the background scan running.
5314 */
5315
a4790dbd
AG		 5316 /* If controller is connecting, we should not start scanning
5317 * since some controllers are not able to scan and connect at
5318 * the same time.
5319 */
5320 conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
5321 if (conn)
5322 return;
5323
4340a124
AG		 5324 /* If controller is currently scanning, we stop it to ensure we
5325 * don't miss any advertising (due to duplicates filter).
5326 */
5327 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
5328 hci_req_add_le_scan_disable(&req);
5329
8ef30fd3 5330 hci_req_add_le_passive_scan(&req);
a4790dbd
AG		 5331
5332 BT_DBG("%s starting background scanning", hdev->name);
5333 }
5334
5335 err = hci_req_run(&req, update_background_scan_complete);
5336 if (err)
5337 BT_ERR("Failed to run HCI request: err %d", err);
5338}
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