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1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
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
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
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
28#include <linux/export.h>
29#include <linux/rfkill.h>
30#include <linux/debugfs.h>
31#include <linux/crypto.h>
32#include <linux/kcov.h>
33#include <linux/property.h>
34#include <linux/suspend.h>
35#include <linux/wait.h>
36#include <asm/unaligned.h>
37
38#include <net/bluetooth/bluetooth.h>
39#include <net/bluetooth/hci_core.h>
40#include <net/bluetooth/l2cap.h>
41#include <net/bluetooth/mgmt.h>
42
43#include "hci_request.h"
44#include "hci_debugfs.h"
45#include "smp.h"
46#include "leds.h"
47#include "msft.h"
48#include "aosp.h"
49#include "hci_codec.h"
50
51static void hci_rx_work(struct work_struct *work);
52static void hci_cmd_work(struct work_struct *work);
53static void hci_tx_work(struct work_struct *work);
54
55/* HCI device list */
56LIST_HEAD(hci_dev_list);
57DEFINE_RWLOCK(hci_dev_list_lock);
58
59/* HCI callback list */
60LIST_HEAD(hci_cb_list);
61DEFINE_MUTEX(hci_cb_list_lock);
62
63/* HCI ID Numbering */
64static DEFINE_IDA(hci_index_ida);
65
66static int hci_scan_req(struct hci_request *req, unsigned long opt)
67{
68 __u8 scan = opt;
69
70 BT_DBG("%s %x", req->hdev->name, scan);
71
72 /* Inquiry and Page scans */
73 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
74 return 0;
75}
76
77static int hci_auth_req(struct hci_request *req, unsigned long opt)
78{
79 __u8 auth = opt;
80
81 BT_DBG("%s %x", req->hdev->name, auth);
82
83 /* Authentication */
84 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
85 return 0;
86}
87
88static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
89{
90 __u8 encrypt = opt;
91
92 BT_DBG("%s %x", req->hdev->name, encrypt);
93
94 /* Encryption */
95 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
96 return 0;
97}
98
99static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
100{
101 __le16 policy = cpu_to_le16(opt);
102
103 BT_DBG("%s %x", req->hdev->name, policy);
104
105 /* Default link policy */
106 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
107 return 0;
108}
109
110/* Get HCI device by index.
111 * Device is held on return. */
112struct hci_dev *hci_dev_get(int index)
113{
114 struct hci_dev *hdev = NULL, *d;
115
116 BT_DBG("%d", index);
117
118 if (index < 0)
119 return NULL;
120
121 read_lock(&hci_dev_list_lock);
122 list_for_each_entry(d, &hci_dev_list, list) {
123 if (d->id == index) {
124 hdev = hci_dev_hold(d);
125 break;
126 }
127 }
128 read_unlock(&hci_dev_list_lock);
129 return hdev;
130}
131
132/* ---- Inquiry support ---- */
133
134bool hci_discovery_active(struct hci_dev *hdev)
135{
136 struct discovery_state *discov = &hdev->discovery;
137
138 switch (discov->state) {
139 case DISCOVERY_FINDING:
140 case DISCOVERY_RESOLVING:
141 return true;
142
143 default:
144 return false;
145 }
146}
147
148void hci_discovery_set_state(struct hci_dev *hdev, int state)
149{
150 int old_state = hdev->discovery.state;
151
152 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
153
154 if (old_state == state)
155 return;
156
157 hdev->discovery.state = state;
158
159 switch (state) {
160 case DISCOVERY_STOPPED:
161 hci_update_passive_scan(hdev);
162
163 if (old_state != DISCOVERY_STARTING)
164 mgmt_discovering(hdev, 0);
165 break;
166 case DISCOVERY_STARTING:
167 break;
168 case DISCOVERY_FINDING:
169 mgmt_discovering(hdev, 1);
170 break;
171 case DISCOVERY_RESOLVING:
172 break;
173 case DISCOVERY_STOPPING:
174 break;
175 }
176}
177
178void hci_inquiry_cache_flush(struct hci_dev *hdev)
179{
180 struct discovery_state *cache = &hdev->discovery;
181 struct inquiry_entry *p, *n;
182
183 list_for_each_entry_safe(p, n, &cache->all, all) {
184 list_del(&p->all);
185 kfree(p);
186 }
187
188 INIT_LIST_HEAD(&cache->unknown);
189 INIT_LIST_HEAD(&cache->resolve);
190}
191
192struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
193 bdaddr_t *bdaddr)
194{
195 struct discovery_state *cache = &hdev->discovery;
196 struct inquiry_entry *e;
197
198 BT_DBG("cache %p, %pMR", cache, bdaddr);
199
200 list_for_each_entry(e, &cache->all, all) {
201 if (!bacmp(&e->data.bdaddr, bdaddr))
202 return e;
203 }
204
205 return NULL;
206}
207
208struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
209 bdaddr_t *bdaddr)
210{
211 struct discovery_state *cache = &hdev->discovery;
212 struct inquiry_entry *e;
213
214 BT_DBG("cache %p, %pMR", cache, bdaddr);
215
216 list_for_each_entry(e, &cache->unknown, list) {
217 if (!bacmp(&e->data.bdaddr, bdaddr))
218 return e;
219 }
220
221 return NULL;
222}
223
224struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
225 bdaddr_t *bdaddr,
226 int state)
227{
228 struct discovery_state *cache = &hdev->discovery;
229 struct inquiry_entry *e;
230
231 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
232
233 list_for_each_entry(e, &cache->resolve, list) {
234 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
235 return e;
236 if (!bacmp(&e->data.bdaddr, bdaddr))
237 return e;
238 }
239
240 return NULL;
241}
242
243void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
244 struct inquiry_entry *ie)
245{
246 struct discovery_state *cache = &hdev->discovery;
247 struct list_head *pos = &cache->resolve;
248 struct inquiry_entry *p;
249
250 list_del(&ie->list);
251
252 list_for_each_entry(p, &cache->resolve, list) {
253 if (p->name_state != NAME_PENDING &&
254 abs(p->data.rssi) >= abs(ie->data.rssi))
255 break;
256 pos = &p->list;
257 }
258
259 list_add(&ie->list, pos);
260}
261
262u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
263 bool name_known)
264{
265 struct discovery_state *cache = &hdev->discovery;
266 struct inquiry_entry *ie;
267 u32 flags = 0;
268
269 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
270
271 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
272
273 if (!data->ssp_mode)
274 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
275
276 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
277 if (ie) {
278 if (!ie->data.ssp_mode)
279 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
280
281 if (ie->name_state == NAME_NEEDED &&
282 data->rssi != ie->data.rssi) {
283 ie->data.rssi = data->rssi;
284 hci_inquiry_cache_update_resolve(hdev, ie);
285 }
286
287 goto update;
288 }
289
290 /* Entry not in the cache. Add new one. */
291 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
292 if (!ie) {
293 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
294 goto done;
295 }
296
297 list_add(&ie->all, &cache->all);
298
299 if (name_known) {
300 ie->name_state = NAME_KNOWN;
301 } else {
302 ie->name_state = NAME_NOT_KNOWN;
303 list_add(&ie->list, &cache->unknown);
304 }
305
306update:
307 if (name_known && ie->name_state != NAME_KNOWN &&
308 ie->name_state != NAME_PENDING) {
309 ie->name_state = NAME_KNOWN;
310 list_del(&ie->list);
311 }
312
313 memcpy(&ie->data, data, sizeof(*data));
314 ie->timestamp = jiffies;
315 cache->timestamp = jiffies;
316
317 if (ie->name_state == NAME_NOT_KNOWN)
318 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
319
320done:
321 return flags;
322}
323
324static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
325{
326 struct discovery_state *cache = &hdev->discovery;
327 struct inquiry_info *info = (struct inquiry_info *) buf;
328 struct inquiry_entry *e;
329 int copied = 0;
330
331 list_for_each_entry(e, &cache->all, all) {
332 struct inquiry_data *data = &e->data;
333
334 if (copied >= num)
335 break;
336
337 bacpy(&info->bdaddr, &data->bdaddr);
338 info->pscan_rep_mode = data->pscan_rep_mode;
339 info->pscan_period_mode = data->pscan_period_mode;
340 info->pscan_mode = data->pscan_mode;
341 memcpy(info->dev_class, data->dev_class, 3);
342 info->clock_offset = data->clock_offset;
343
344 info++;
345 copied++;
346 }
347
348 BT_DBG("cache %p, copied %d", cache, copied);
349 return copied;
350}
351
352static int hci_inq_req(struct hci_request *req, unsigned long opt)
353{
354 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
355 struct hci_dev *hdev = req->hdev;
356 struct hci_cp_inquiry cp;
357
358 BT_DBG("%s", hdev->name);
359
360 if (test_bit(HCI_INQUIRY, &hdev->flags))
361 return 0;
362
363 /* Start Inquiry */
364 memcpy(&cp.lap, &ir->lap, 3);
365 cp.length = ir->length;
366 cp.num_rsp = ir->num_rsp;
367 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
368
369 return 0;
370}
371
372int hci_inquiry(void __user *arg)
373{
374 __u8 __user *ptr = arg;
375 struct hci_inquiry_req ir;
376 struct hci_dev *hdev;
377 int err = 0, do_inquiry = 0, max_rsp;
378 long timeo;
379 __u8 *buf;
380
381 if (copy_from_user(&ir, ptr, sizeof(ir)))
382 return -EFAULT;
383
384 hdev = hci_dev_get(ir.dev_id);
385 if (!hdev)
386 return -ENODEV;
387
388 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
389 err = -EBUSY;
390 goto done;
391 }
392
393 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
394 err = -EOPNOTSUPP;
395 goto done;
396 }
397
398 if (hdev->dev_type != HCI_PRIMARY) {
399 err = -EOPNOTSUPP;
400 goto done;
401 }
402
403 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
404 err = -EOPNOTSUPP;
405 goto done;
406 }
407
408 /* Restrict maximum inquiry length to 60 seconds */
409 if (ir.length > 60) {
410 err = -EINVAL;
411 goto done;
412 }
413
414 hci_dev_lock(hdev);
415 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
416 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
417 hci_inquiry_cache_flush(hdev);
418 do_inquiry = 1;
419 }
420 hci_dev_unlock(hdev);
421
422 timeo = ir.length * msecs_to_jiffies(2000);
423
424 if (do_inquiry) {
425 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
426 timeo, NULL);
427 if (err < 0)
428 goto done;
429
430 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
431 * cleared). If it is interrupted by a signal, return -EINTR.
432 */
433 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
434 TASK_INTERRUPTIBLE)) {
435 err = -EINTR;
436 goto done;
437 }
438 }
439
440 /* for unlimited number of responses we will use buffer with
441 * 255 entries
442 */
443 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
444
445 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
446 * copy it to the user space.
447 */
448 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
449 if (!buf) {
450 err = -ENOMEM;
451 goto done;
452 }
453
454 hci_dev_lock(hdev);
455 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
456 hci_dev_unlock(hdev);
457
458 BT_DBG("num_rsp %d", ir.num_rsp);
459
460 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
461 ptr += sizeof(ir);
462 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
463 ir.num_rsp))
464 err = -EFAULT;
465 } else
466 err = -EFAULT;
467
468 kfree(buf);
469
470done:
471 hci_dev_put(hdev);
472 return err;
473}
474
475static int hci_dev_do_open(struct hci_dev *hdev)
476{
477 int ret = 0;
478
479 BT_DBG("%s %p", hdev->name, hdev);
480
481 hci_req_sync_lock(hdev);
482
483 ret = hci_dev_open_sync(hdev);
484
485 hci_req_sync_unlock(hdev);
486 return ret;
487}
488
489/* ---- HCI ioctl helpers ---- */
490
491int hci_dev_open(__u16 dev)
492{
493 struct hci_dev *hdev;
494 int err;
495
496 hdev = hci_dev_get(dev);
497 if (!hdev)
498 return -ENODEV;
499
500 /* Devices that are marked as unconfigured can only be powered
501 * up as user channel. Trying to bring them up as normal devices
502 * will result into a failure. Only user channel operation is
503 * possible.
504 *
505 * When this function is called for a user channel, the flag
506 * HCI_USER_CHANNEL will be set first before attempting to
507 * open the device.
508 */
509 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
510 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
511 err = -EOPNOTSUPP;
512 goto done;
513 }
514
515 /* We need to ensure that no other power on/off work is pending
516 * before proceeding to call hci_dev_do_open. This is
517 * particularly important if the setup procedure has not yet
518 * completed.
519 */
520 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
521 cancel_delayed_work(&hdev->power_off);
522
523 /* After this call it is guaranteed that the setup procedure
524 * has finished. This means that error conditions like RFKILL
525 * or no valid public or static random address apply.
526 */
527 flush_workqueue(hdev->req_workqueue);
528
529 /* For controllers not using the management interface and that
530 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
531 * so that pairing works for them. Once the management interface
532 * is in use this bit will be cleared again and userspace has
533 * to explicitly enable it.
534 */
535 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
536 !hci_dev_test_flag(hdev, HCI_MGMT))
537 hci_dev_set_flag(hdev, HCI_BONDABLE);
538
539 err = hci_dev_do_open(hdev);
540
541done:
542 hci_dev_put(hdev);
543 return err;
544}
545
546int hci_dev_do_close(struct hci_dev *hdev)
547{
548 int err;
549
550 BT_DBG("%s %p", hdev->name, hdev);
551
552 hci_req_sync_lock(hdev);
553
554 err = hci_dev_close_sync(hdev);
555
556 hci_req_sync_unlock(hdev);
557
558 return err;
559}
560
561int hci_dev_close(__u16 dev)
562{
563 struct hci_dev *hdev;
564 int err;
565
566 hdev = hci_dev_get(dev);
567 if (!hdev)
568 return -ENODEV;
569
570 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
571 err = -EBUSY;
572 goto done;
573 }
574
575 cancel_work_sync(&hdev->power_on);
576 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
577 cancel_delayed_work(&hdev->power_off);
578
579 err = hci_dev_do_close(hdev);
580
581done:
582 hci_dev_put(hdev);
583 return err;
584}
585
586static int hci_dev_do_reset(struct hci_dev *hdev)
587{
588 int ret;
589
590 BT_DBG("%s %p", hdev->name, hdev);
591
592 hci_req_sync_lock(hdev);
593
594 /* Drop queues */
595 skb_queue_purge(&hdev->rx_q);
596 skb_queue_purge(&hdev->cmd_q);
597
598 /* Cancel these to avoid queueing non-chained pending work */
599 hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
600 /* Wait for
601 *
602 * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
603 * queue_delayed_work(&hdev->{cmd,ncmd}_timer)
604 *
605 * inside RCU section to see the flag or complete scheduling.
606 */
607 synchronize_rcu();
608 /* Explicitly cancel works in case scheduled after setting the flag. */
609 cancel_delayed_work(&hdev->cmd_timer);
610 cancel_delayed_work(&hdev->ncmd_timer);
611
612 /* Avoid potential lockdep warnings from the *_flush() calls by
613 * ensuring the workqueue is empty up front.
614 */
615 drain_workqueue(hdev->workqueue);
616
617 hci_dev_lock(hdev);
618 hci_inquiry_cache_flush(hdev);
619 hci_conn_hash_flush(hdev);
620 hci_dev_unlock(hdev);
621
622 if (hdev->flush)
623 hdev->flush(hdev);
624
625 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
626
627 atomic_set(&hdev->cmd_cnt, 1);
628 hdev->acl_cnt = 0;
629 hdev->sco_cnt = 0;
630 hdev->le_cnt = 0;
631 hdev->iso_cnt = 0;
632
633 ret = hci_reset_sync(hdev);
634
635 hci_req_sync_unlock(hdev);
636 return ret;
637}
638
639int hci_dev_reset(__u16 dev)
640{
641 struct hci_dev *hdev;
642 int err;
643
644 hdev = hci_dev_get(dev);
645 if (!hdev)
646 return -ENODEV;
647
648 if (!test_bit(HCI_UP, &hdev->flags)) {
649 err = -ENETDOWN;
650 goto done;
651 }
652
653 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
654 err = -EBUSY;
655 goto done;
656 }
657
658 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
659 err = -EOPNOTSUPP;
660 goto done;
661 }
662
663 err = hci_dev_do_reset(hdev);
664
665done:
666 hci_dev_put(hdev);
667 return err;
668}
669
670int hci_dev_reset_stat(__u16 dev)
671{
672 struct hci_dev *hdev;
673 int ret = 0;
674
675 hdev = hci_dev_get(dev);
676 if (!hdev)
677 return -ENODEV;
678
679 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
680 ret = -EBUSY;
681 goto done;
682 }
683
684 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
685 ret = -EOPNOTSUPP;
686 goto done;
687 }
688
689 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
690
691done:
692 hci_dev_put(hdev);
693 return ret;
694}
695
696static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan)
697{
698 bool conn_changed, discov_changed;
699
700 BT_DBG("%s scan 0x%02x", hdev->name, scan);
701
702 if ((scan & SCAN_PAGE))
703 conn_changed = !hci_dev_test_and_set_flag(hdev,
704 HCI_CONNECTABLE);
705 else
706 conn_changed = hci_dev_test_and_clear_flag(hdev,
707 HCI_CONNECTABLE);
708
709 if ((scan & SCAN_INQUIRY)) {
710 discov_changed = !hci_dev_test_and_set_flag(hdev,
711 HCI_DISCOVERABLE);
712 } else {
713 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
714 discov_changed = hci_dev_test_and_clear_flag(hdev,
715 HCI_DISCOVERABLE);
716 }
717
718 if (!hci_dev_test_flag(hdev, HCI_MGMT))
719 return;
720
721 if (conn_changed || discov_changed) {
722 /* In case this was disabled through mgmt */
723 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
724
725 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
726 hci_update_adv_data(hdev, hdev->cur_adv_instance);
727
728 mgmt_new_settings(hdev);
729 }
730}
731
732int hci_dev_cmd(unsigned int cmd, void __user *arg)
733{
734 struct hci_dev *hdev;
735 struct hci_dev_req dr;
736 int err = 0;
737
738 if (copy_from_user(&dr, arg, sizeof(dr)))
739 return -EFAULT;
740
741 hdev = hci_dev_get(dr.dev_id);
742 if (!hdev)
743 return -ENODEV;
744
745 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
746 err = -EBUSY;
747 goto done;
748 }
749
750 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
751 err = -EOPNOTSUPP;
752 goto done;
753 }
754
755 if (hdev->dev_type != HCI_PRIMARY) {
756 err = -EOPNOTSUPP;
757 goto done;
758 }
759
760 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
761 err = -EOPNOTSUPP;
762 goto done;
763 }
764
765 switch (cmd) {
766 case HCISETAUTH:
767 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
768 HCI_INIT_TIMEOUT, NULL);
769 break;
770
771 case HCISETENCRYPT:
772 if (!lmp_encrypt_capable(hdev)) {
773 err = -EOPNOTSUPP;
774 break;
775 }
776
777 if (!test_bit(HCI_AUTH, &hdev->flags)) {
778 /* Auth must be enabled first */
779 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
780 HCI_INIT_TIMEOUT, NULL);
781 if (err)
782 break;
783 }
784
785 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
786 HCI_INIT_TIMEOUT, NULL);
787 break;
788
789 case HCISETSCAN:
790 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
791 HCI_INIT_TIMEOUT, NULL);
792
793 /* Ensure that the connectable and discoverable states
794 * get correctly modified as this was a non-mgmt change.
795 */
796 if (!err)
797 hci_update_passive_scan_state(hdev, dr.dev_opt);
798 break;
799
800 case HCISETLINKPOL:
801 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
802 HCI_INIT_TIMEOUT, NULL);
803 break;
804
805 case HCISETLINKMODE:
806 hdev->link_mode = ((__u16) dr.dev_opt) &
807 (HCI_LM_MASTER | HCI_LM_ACCEPT);
808 break;
809
810 case HCISETPTYPE:
811 if (hdev->pkt_type == (__u16) dr.dev_opt)
812 break;
813
814 hdev->pkt_type = (__u16) dr.dev_opt;
815 mgmt_phy_configuration_changed(hdev, NULL);
816 break;
817
818 case HCISETACLMTU:
819 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
820 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
821 break;
822
823 case HCISETSCOMTU:
824 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
825 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
826 break;
827
828 default:
829 err = -EINVAL;
830 break;
831 }
832
833done:
834 hci_dev_put(hdev);
835 return err;
836}
837
838int hci_get_dev_list(void __user *arg)
839{
840 struct hci_dev *hdev;
841 struct hci_dev_list_req *dl;
842 struct hci_dev_req *dr;
843 int n = 0, size, err;
844 __u16 dev_num;
845
846 if (get_user(dev_num, (__u16 __user *) arg))
847 return -EFAULT;
848
849 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
850 return -EINVAL;
851
852 size = sizeof(*dl) + dev_num * sizeof(*dr);
853
854 dl = kzalloc(size, GFP_KERNEL);
855 if (!dl)
856 return -ENOMEM;
857
858 dr = dl->dev_req;
859
860 read_lock(&hci_dev_list_lock);
861 list_for_each_entry(hdev, &hci_dev_list, list) {
862 unsigned long flags = hdev->flags;
863
864 /* When the auto-off is configured it means the transport
865 * is running, but in that case still indicate that the
866 * device is actually down.
867 */
868 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
869 flags &= ~BIT(HCI_UP);
870
871 (dr + n)->dev_id = hdev->id;
872 (dr + n)->dev_opt = flags;
873
874 if (++n >= dev_num)
875 break;
876 }
877 read_unlock(&hci_dev_list_lock);
878
879 dl->dev_num = n;
880 size = sizeof(*dl) + n * sizeof(*dr);
881
882 err = copy_to_user(arg, dl, size);
883 kfree(dl);
884
885 return err ? -EFAULT : 0;
886}
887
888int hci_get_dev_info(void __user *arg)
889{
890 struct hci_dev *hdev;
891 struct hci_dev_info di;
892 unsigned long flags;
893 int err = 0;
894
895 if (copy_from_user(&di, arg, sizeof(di)))
896 return -EFAULT;
897
898 hdev = hci_dev_get(di.dev_id);
899 if (!hdev)
900 return -ENODEV;
901
902 /* When the auto-off is configured it means the transport
903 * is running, but in that case still indicate that the
904 * device is actually down.
905 */
906 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
907 flags = hdev->flags & ~BIT(HCI_UP);
908 else
909 flags = hdev->flags;
910
911 strcpy(di.name, hdev->name);
912 di.bdaddr = hdev->bdaddr;
913 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
914 di.flags = flags;
915 di.pkt_type = hdev->pkt_type;
916 if (lmp_bredr_capable(hdev)) {
917 di.acl_mtu = hdev->acl_mtu;
918 di.acl_pkts = hdev->acl_pkts;
919 di.sco_mtu = hdev->sco_mtu;
920 di.sco_pkts = hdev->sco_pkts;
921 } else {
922 di.acl_mtu = hdev->le_mtu;
923 di.acl_pkts = hdev->le_pkts;
924 di.sco_mtu = 0;
925 di.sco_pkts = 0;
926 }
927 di.link_policy = hdev->link_policy;
928 di.link_mode = hdev->link_mode;
929
930 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
931 memcpy(&di.features, &hdev->features, sizeof(di.features));
932
933 if (copy_to_user(arg, &di, sizeof(di)))
934 err = -EFAULT;
935
936 hci_dev_put(hdev);
937
938 return err;
939}
940
941/* ---- Interface to HCI drivers ---- */
942
943static int hci_rfkill_set_block(void *data, bool blocked)
944{
945 struct hci_dev *hdev = data;
946
947 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
948
949 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
950 return -EBUSY;
951
952 if (blocked) {
953 hci_dev_set_flag(hdev, HCI_RFKILLED);
954 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
955 !hci_dev_test_flag(hdev, HCI_CONFIG))
956 hci_dev_do_close(hdev);
957 } else {
958 hci_dev_clear_flag(hdev, HCI_RFKILLED);
959 }
960
961 return 0;
962}
963
964static const struct rfkill_ops hci_rfkill_ops = {
965 .set_block = hci_rfkill_set_block,
966};
967
968static void hci_power_on(struct work_struct *work)
969{
970 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
971 int err;
972
973 BT_DBG("%s", hdev->name);
974
975 if (test_bit(HCI_UP, &hdev->flags) &&
976 hci_dev_test_flag(hdev, HCI_MGMT) &&
977 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
978 cancel_delayed_work(&hdev->power_off);
979 err = hci_powered_update_sync(hdev);
980 mgmt_power_on(hdev, err);
981 return;
982 }
983
984 err = hci_dev_do_open(hdev);
985 if (err < 0) {
986 hci_dev_lock(hdev);
987 mgmt_set_powered_failed(hdev, err);
988 hci_dev_unlock(hdev);
989 return;
990 }
991
992 /* During the HCI setup phase, a few error conditions are
993 * ignored and they need to be checked now. If they are still
994 * valid, it is important to turn the device back off.
995 */
996 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
997 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
998 (hdev->dev_type == HCI_PRIMARY &&
999 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1000 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
1001 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
1002 hci_dev_do_close(hdev);
1003 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
1004 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1005 HCI_AUTO_OFF_TIMEOUT);
1006 }
1007
1008 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
1009 /* For unconfigured devices, set the HCI_RAW flag
1010 * so that userspace can easily identify them.
1011 */
1012 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1013 set_bit(HCI_RAW, &hdev->flags);
1014
1015 /* For fully configured devices, this will send
1016 * the Index Added event. For unconfigured devices,
1017 * it will send Unconfigued Index Added event.
1018 *
1019 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
1020 * and no event will be send.
1021 */
1022 mgmt_index_added(hdev);
1023 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
1024 /* When the controller is now configured, then it
1025 * is important to clear the HCI_RAW flag.
1026 */
1027 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1028 clear_bit(HCI_RAW, &hdev->flags);
1029
1030 /* Powering on the controller with HCI_CONFIG set only
1031 * happens with the transition from unconfigured to
1032 * configured. This will send the Index Added event.
1033 */
1034 mgmt_index_added(hdev);
1035 }
1036}
1037
1038static void hci_power_off(struct work_struct *work)
1039{
1040 struct hci_dev *hdev = container_of(work, struct hci_dev,
1041 power_off.work);
1042
1043 BT_DBG("%s", hdev->name);
1044
1045 hci_dev_do_close(hdev);
1046}
1047
1048static void hci_error_reset(struct work_struct *work)
1049{
1050 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
1051
1052 hci_dev_hold(hdev);
1053 BT_DBG("%s", hdev->name);
1054
1055 if (hdev->hw_error)
1056 hdev->hw_error(hdev, hdev->hw_error_code);
1057 else
1058 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
1059
1060 if (!hci_dev_do_close(hdev))
1061 hci_dev_do_open(hdev);
1062
1063 hci_dev_put(hdev);
1064}
1065
1066void hci_uuids_clear(struct hci_dev *hdev)
1067{
1068 struct bt_uuid *uuid, *tmp;
1069
1070 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1071 list_del(&uuid->list);
1072 kfree(uuid);
1073 }
1074}
1075
1076void hci_link_keys_clear(struct hci_dev *hdev)
1077{
1078 struct link_key *key, *tmp;
1079
1080 list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
1081 list_del_rcu(&key->list);
1082 kfree_rcu(key, rcu);
1083 }
1084}
1085
1086void hci_smp_ltks_clear(struct hci_dev *hdev)
1087{
1088 struct smp_ltk *k, *tmp;
1089
1090 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1091 list_del_rcu(&k->list);
1092 kfree_rcu(k, rcu);
1093 }
1094}
1095
1096void hci_smp_irks_clear(struct hci_dev *hdev)
1097{
1098 struct smp_irk *k, *tmp;
1099
1100 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1101 list_del_rcu(&k->list);
1102 kfree_rcu(k, rcu);
1103 }
1104}
1105
1106void hci_blocked_keys_clear(struct hci_dev *hdev)
1107{
1108 struct blocked_key *b, *tmp;
1109
1110 list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
1111 list_del_rcu(&b->list);
1112 kfree_rcu(b, rcu);
1113 }
1114}
1115
1116bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
1117{
1118 bool blocked = false;
1119 struct blocked_key *b;
1120
1121 rcu_read_lock();
1122 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
1123 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
1124 blocked = true;
1125 break;
1126 }
1127 }
1128
1129 rcu_read_unlock();
1130 return blocked;
1131}
1132
1133struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1134{
1135 struct link_key *k;
1136
1137 rcu_read_lock();
1138 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
1139 if (bacmp(bdaddr, &k->bdaddr) == 0) {
1140 rcu_read_unlock();
1141
1142 if (hci_is_blocked_key(hdev,
1143 HCI_BLOCKED_KEY_TYPE_LINKKEY,
1144 k->val)) {
1145 bt_dev_warn_ratelimited(hdev,
1146 "Link key blocked for %pMR",
1147 &k->bdaddr);
1148 return NULL;
1149 }
1150
1151 return k;
1152 }
1153 }
1154 rcu_read_unlock();
1155
1156 return NULL;
1157}
1158
1159static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1160 u8 key_type, u8 old_key_type)
1161{
1162 /* Legacy key */
1163 if (key_type < 0x03)
1164 return true;
1165
1166 /* Debug keys are insecure so don't store them persistently */
1167 if (key_type == HCI_LK_DEBUG_COMBINATION)
1168 return false;
1169
1170 /* Changed combination key and there's no previous one */
1171 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1172 return false;
1173
1174 /* Security mode 3 case */
1175 if (!conn)
1176 return true;
1177
1178 /* BR/EDR key derived using SC from an LE link */
1179 if (conn->type == LE_LINK)
1180 return true;
1181
1182 /* Neither local nor remote side had no-bonding as requirement */
1183 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1184 return true;
1185
1186 /* Local side had dedicated bonding as requirement */
1187 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1188 return true;
1189
1190 /* Remote side had dedicated bonding as requirement */
1191 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1192 return true;
1193
1194 /* If none of the above criteria match, then don't store the key
1195 * persistently */
1196 return false;
1197}
1198
1199static u8 ltk_role(u8 type)
1200{
1201 if (type == SMP_LTK)
1202 return HCI_ROLE_MASTER;
1203
1204 return HCI_ROLE_SLAVE;
1205}
1206
1207struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1208 u8 addr_type, u8 role)
1209{
1210 struct smp_ltk *k;
1211
1212 rcu_read_lock();
1213 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1214 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
1215 continue;
1216
1217 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
1218 rcu_read_unlock();
1219
1220 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
1221 k->val)) {
1222 bt_dev_warn_ratelimited(hdev,
1223 "LTK blocked for %pMR",
1224 &k->bdaddr);
1225 return NULL;
1226 }
1227
1228 return k;
1229 }
1230 }
1231 rcu_read_unlock();
1232
1233 return NULL;
1234}
1235
1236struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
1237{
1238 struct smp_irk *irk_to_return = NULL;
1239 struct smp_irk *irk;
1240
1241 rcu_read_lock();
1242 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1243 if (!bacmp(&irk->rpa, rpa)) {
1244 irk_to_return = irk;
1245 goto done;
1246 }
1247 }
1248
1249 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1250 if (smp_irk_matches(hdev, irk->val, rpa)) {
1251 bacpy(&irk->rpa, rpa);
1252 irk_to_return = irk;
1253 goto done;
1254 }
1255 }
1256
1257done:
1258 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1259 irk_to_return->val)) {
1260 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1261 &irk_to_return->bdaddr);
1262 irk_to_return = NULL;
1263 }
1264
1265 rcu_read_unlock();
1266
1267 return irk_to_return;
1268}
1269
1270struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1271 u8 addr_type)
1272{
1273 struct smp_irk *irk_to_return = NULL;
1274 struct smp_irk *irk;
1275
1276 /* Identity Address must be public or static random */
1277 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
1278 return NULL;
1279
1280 rcu_read_lock();
1281 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1282 if (addr_type == irk->addr_type &&
1283 bacmp(bdaddr, &irk->bdaddr) == 0) {
1284 irk_to_return = irk;
1285 goto done;
1286 }
1287 }
1288
1289done:
1290
1291 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1292 irk_to_return->val)) {
1293 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1294 &irk_to_return->bdaddr);
1295 irk_to_return = NULL;
1296 }
1297
1298 rcu_read_unlock();
1299
1300 return irk_to_return;
1301}
1302
1303struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1304 bdaddr_t *bdaddr, u8 *val, u8 type,
1305 u8 pin_len, bool *persistent)
1306{
1307 struct link_key *key, *old_key;
1308 u8 old_key_type;
1309
1310 old_key = hci_find_link_key(hdev, bdaddr);
1311 if (old_key) {
1312 old_key_type = old_key->type;
1313 key = old_key;
1314 } else {
1315 old_key_type = conn ? conn->key_type : 0xff;
1316 key = kzalloc(sizeof(*key), GFP_KERNEL);
1317 if (!key)
1318 return NULL;
1319 list_add_rcu(&key->list, &hdev->link_keys);
1320 }
1321
1322 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1323
1324 /* Some buggy controller combinations generate a changed
1325 * combination key for legacy pairing even when there's no
1326 * previous key */
1327 if (type == HCI_LK_CHANGED_COMBINATION &&
1328 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1329 type = HCI_LK_COMBINATION;
1330 if (conn)
1331 conn->key_type = type;
1332 }
1333
1334 bacpy(&key->bdaddr, bdaddr);
1335 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1336 key->pin_len = pin_len;
1337
1338 if (type == HCI_LK_CHANGED_COMBINATION)
1339 key->type = old_key_type;
1340 else
1341 key->type = type;
1342
1343 if (persistent)
1344 *persistent = hci_persistent_key(hdev, conn, type,
1345 old_key_type);
1346
1347 return key;
1348}
1349
1350struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1351 u8 addr_type, u8 type, u8 authenticated,
1352 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
1353{
1354 struct smp_ltk *key, *old_key;
1355 u8 role = ltk_role(type);
1356
1357 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
1358 if (old_key)
1359 key = old_key;
1360 else {
1361 key = kzalloc(sizeof(*key), GFP_KERNEL);
1362 if (!key)
1363 return NULL;
1364 list_add_rcu(&key->list, &hdev->long_term_keys);
1365 }
1366
1367 bacpy(&key->bdaddr, bdaddr);
1368 key->bdaddr_type = addr_type;
1369 memcpy(key->val, tk, sizeof(key->val));
1370 key->authenticated = authenticated;
1371 key->ediv = ediv;
1372 key->rand = rand;
1373 key->enc_size = enc_size;
1374 key->type = type;
1375
1376 return key;
1377}
1378
1379struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1380 u8 addr_type, u8 val[16], bdaddr_t *rpa)
1381{
1382 struct smp_irk *irk;
1383
1384 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
1385 if (!irk) {
1386 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
1387 if (!irk)
1388 return NULL;
1389
1390 bacpy(&irk->bdaddr, bdaddr);
1391 irk->addr_type = addr_type;
1392
1393 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
1394 }
1395
1396 memcpy(irk->val, val, 16);
1397 bacpy(&irk->rpa, rpa);
1398
1399 return irk;
1400}
1401
1402int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1403{
1404 struct link_key *key;
1405
1406 key = hci_find_link_key(hdev, bdaddr);
1407 if (!key)
1408 return -ENOENT;
1409
1410 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1411
1412 list_del_rcu(&key->list);
1413 kfree_rcu(key, rcu);
1414
1415 return 0;
1416}
1417
1418int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
1419{
1420 struct smp_ltk *k, *tmp;
1421 int removed = 0;
1422
1423 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1424 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
1425 continue;
1426
1427 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1428
1429 list_del_rcu(&k->list);
1430 kfree_rcu(k, rcu);
1431 removed++;
1432 }
1433
1434 return removed ? 0 : -ENOENT;
1435}
1436
1437void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
1438{
1439 struct smp_irk *k, *tmp;
1440
1441 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1442 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
1443 continue;
1444
1445 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1446
1447 list_del_rcu(&k->list);
1448 kfree_rcu(k, rcu);
1449 }
1450}
1451
1452bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1453{
1454 struct smp_ltk *k;
1455 struct smp_irk *irk;
1456 u8 addr_type;
1457
1458 if (type == BDADDR_BREDR) {
1459 if (hci_find_link_key(hdev, bdaddr))
1460 return true;
1461 return false;
1462 }
1463
1464 /* Convert to HCI addr type which struct smp_ltk uses */
1465 if (type == BDADDR_LE_PUBLIC)
1466 addr_type = ADDR_LE_DEV_PUBLIC;
1467 else
1468 addr_type = ADDR_LE_DEV_RANDOM;
1469
1470 irk = hci_get_irk(hdev, bdaddr, addr_type);
1471 if (irk) {
1472 bdaddr = &irk->bdaddr;
1473 addr_type = irk->addr_type;
1474 }
1475
1476 rcu_read_lock();
1477 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1478 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
1479 rcu_read_unlock();
1480 return true;
1481 }
1482 }
1483 rcu_read_unlock();
1484
1485 return false;
1486}
1487
1488/* HCI command timer function */
1489static void hci_cmd_timeout(struct work_struct *work)
1490{
1491 struct hci_dev *hdev = container_of(work, struct hci_dev,
1492 cmd_timer.work);
1493
1494 if (hdev->sent_cmd) {
1495 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1496 u16 opcode = __le16_to_cpu(sent->opcode);
1497
1498 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
1499 } else {
1500 bt_dev_err(hdev, "command tx timeout");
1501 }
1502
1503 if (hdev->cmd_timeout)
1504 hdev->cmd_timeout(hdev);
1505
1506 atomic_set(&hdev->cmd_cnt, 1);
1507 queue_work(hdev->workqueue, &hdev->cmd_work);
1508}
1509
1510/* HCI ncmd timer function */
1511static void hci_ncmd_timeout(struct work_struct *work)
1512{
1513 struct hci_dev *hdev = container_of(work, struct hci_dev,
1514 ncmd_timer.work);
1515
1516 bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0");
1517
1518 /* During HCI_INIT phase no events can be injected if the ncmd timer
1519 * triggers since the procedure has its own timeout handling.
1520 */
1521 if (test_bit(HCI_INIT, &hdev->flags))
1522 return;
1523
1524 /* This is an irrecoverable state, inject hardware error event */
1525 hci_reset_dev(hdev);
1526}
1527
1528struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1529 bdaddr_t *bdaddr, u8 bdaddr_type)
1530{
1531 struct oob_data *data;
1532
1533 list_for_each_entry(data, &hdev->remote_oob_data, list) {
1534 if (bacmp(bdaddr, &data->bdaddr) != 0)
1535 continue;
1536 if (data->bdaddr_type != bdaddr_type)
1537 continue;
1538 return data;
1539 }
1540
1541 return NULL;
1542}
1543
1544int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1545 u8 bdaddr_type)
1546{
1547 struct oob_data *data;
1548
1549 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1550 if (!data)
1551 return -ENOENT;
1552
1553 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
1554
1555 list_del(&data->list);
1556 kfree(data);
1557
1558 return 0;
1559}
1560
1561void hci_remote_oob_data_clear(struct hci_dev *hdev)
1562{
1563 struct oob_data *data, *n;
1564
1565 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1566 list_del(&data->list);
1567 kfree(data);
1568 }
1569}
1570
1571int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1572 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1573 u8 *hash256, u8 *rand256)
1574{
1575 struct oob_data *data;
1576
1577 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1578 if (!data) {
1579 data = kmalloc(sizeof(*data), GFP_KERNEL);
1580 if (!data)
1581 return -ENOMEM;
1582
1583 bacpy(&data->bdaddr, bdaddr);
1584 data->bdaddr_type = bdaddr_type;
1585 list_add(&data->list, &hdev->remote_oob_data);
1586 }
1587
1588 if (hash192 && rand192) {
1589 memcpy(data->hash192, hash192, sizeof(data->hash192));
1590 memcpy(data->rand192, rand192, sizeof(data->rand192));
1591 if (hash256 && rand256)
1592 data->present = 0x03;
1593 } else {
1594 memset(data->hash192, 0, sizeof(data->hash192));
1595 memset(data->rand192, 0, sizeof(data->rand192));
1596 if (hash256 && rand256)
1597 data->present = 0x02;
1598 else
1599 data->present = 0x00;
1600 }
1601
1602 if (hash256 && rand256) {
1603 memcpy(data->hash256, hash256, sizeof(data->hash256));
1604 memcpy(data->rand256, rand256, sizeof(data->rand256));
1605 } else {
1606 memset(data->hash256, 0, sizeof(data->hash256));
1607 memset(data->rand256, 0, sizeof(data->rand256));
1608 if (hash192 && rand192)
1609 data->present = 0x01;
1610 }
1611
1612 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1613
1614 return 0;
1615}
1616
1617/* This function requires the caller holds hdev->lock */
1618struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
1619{
1620 struct adv_info *adv_instance;
1621
1622 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
1623 if (adv_instance->instance == instance)
1624 return adv_instance;
1625 }
1626
1627 return NULL;
1628}
1629
1630/* This function requires the caller holds hdev->lock */
1631struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
1632{
1633 struct adv_info *cur_instance;
1634
1635 cur_instance = hci_find_adv_instance(hdev, instance);
1636 if (!cur_instance)
1637 return NULL;
1638
1639 if (cur_instance == list_last_entry(&hdev->adv_instances,
1640 struct adv_info, list))
1641 return list_first_entry(&hdev->adv_instances,
1642 struct adv_info, list);
1643 else
1644 return list_next_entry(cur_instance, list);
1645}
1646
1647/* This function requires the caller holds hdev->lock */
1648int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
1649{
1650 struct adv_info *adv_instance;
1651
1652 adv_instance = hci_find_adv_instance(hdev, instance);
1653 if (!adv_instance)
1654 return -ENOENT;
1655
1656 BT_DBG("%s removing %dMR", hdev->name, instance);
1657
1658 if (hdev->cur_adv_instance == instance) {
1659 if (hdev->adv_instance_timeout) {
1660 cancel_delayed_work(&hdev->adv_instance_expire);
1661 hdev->adv_instance_timeout = 0;
1662 }
1663 hdev->cur_adv_instance = 0x00;
1664 }
1665
1666 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1667
1668 list_del(&adv_instance->list);
1669 kfree(adv_instance);
1670
1671 hdev->adv_instance_cnt--;
1672
1673 return 0;
1674}
1675
1676void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
1677{
1678 struct adv_info *adv_instance, *n;
1679
1680 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
1681 adv_instance->rpa_expired = rpa_expired;
1682}
1683
1684/* This function requires the caller holds hdev->lock */
1685void hci_adv_instances_clear(struct hci_dev *hdev)
1686{
1687 struct adv_info *adv_instance, *n;
1688
1689 if (hdev->adv_instance_timeout) {
1690 cancel_delayed_work(&hdev->adv_instance_expire);
1691 hdev->adv_instance_timeout = 0;
1692 }
1693
1694 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
1695 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1696 list_del(&adv_instance->list);
1697 kfree(adv_instance);
1698 }
1699
1700 hdev->adv_instance_cnt = 0;
1701 hdev->cur_adv_instance = 0x00;
1702}
1703
1704static void adv_instance_rpa_expired(struct work_struct *work)
1705{
1706 struct adv_info *adv_instance = container_of(work, struct adv_info,
1707 rpa_expired_cb.work);
1708
1709 BT_DBG("");
1710
1711 adv_instance->rpa_expired = true;
1712}
1713
1714/* This function requires the caller holds hdev->lock */
1715struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1716 u32 flags, u16 adv_data_len, u8 *adv_data,
1717 u16 scan_rsp_len, u8 *scan_rsp_data,
1718 u16 timeout, u16 duration, s8 tx_power,
1719 u32 min_interval, u32 max_interval,
1720 u8 mesh_handle)
1721{
1722 struct adv_info *adv;
1723
1724 adv = hci_find_adv_instance(hdev, instance);
1725 if (adv) {
1726 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1727 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1728 memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data));
1729 } else {
1730 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
1731 instance < 1 || instance > hdev->le_num_of_adv_sets + 1)
1732 return ERR_PTR(-EOVERFLOW);
1733
1734 adv = kzalloc(sizeof(*adv), GFP_KERNEL);
1735 if (!adv)
1736 return ERR_PTR(-ENOMEM);
1737
1738 adv->pending = true;
1739 adv->instance = instance;
1740 list_add(&adv->list, &hdev->adv_instances);
1741 hdev->adv_instance_cnt++;
1742 }
1743
1744 adv->flags = flags;
1745 adv->min_interval = min_interval;
1746 adv->max_interval = max_interval;
1747 adv->tx_power = tx_power;
1748 /* Defining a mesh_handle changes the timing units to ms,
1749 * rather than seconds, and ties the instance to the requested
1750 * mesh_tx queue.
1751 */
1752 adv->mesh = mesh_handle;
1753
1754 hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
1755 scan_rsp_len, scan_rsp_data);
1756
1757 adv->timeout = timeout;
1758 adv->remaining_time = timeout;
1759
1760 if (duration == 0)
1761 adv->duration = hdev->def_multi_adv_rotation_duration;
1762 else
1763 adv->duration = duration;
1764
1765 INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
1766
1767 BT_DBG("%s for %dMR", hdev->name, instance);
1768
1769 return adv;
1770}
1771
1772/* This function requires the caller holds hdev->lock */
1773struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1774 u32 flags, u8 data_len, u8 *data,
1775 u32 min_interval, u32 max_interval)
1776{
1777 struct adv_info *adv;
1778
1779 adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL,
1780 0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE,
1781 min_interval, max_interval, 0);
1782 if (IS_ERR(adv))
1783 return adv;
1784
1785 adv->periodic = true;
1786 adv->per_adv_data_len = data_len;
1787
1788 if (data)
1789 memcpy(adv->per_adv_data, data, data_len);
1790
1791 return adv;
1792}
1793
1794/* This function requires the caller holds hdev->lock */
1795int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1796 u16 adv_data_len, u8 *adv_data,
1797 u16 scan_rsp_len, u8 *scan_rsp_data)
1798{
1799 struct adv_info *adv;
1800
1801 adv = hci_find_adv_instance(hdev, instance);
1802
1803 /* If advertisement doesn't exist, we can't modify its data */
1804 if (!adv)
1805 return -ENOENT;
1806
1807 if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) {
1808 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1809 memcpy(adv->adv_data, adv_data, adv_data_len);
1810 adv->adv_data_len = adv_data_len;
1811 adv->adv_data_changed = true;
1812 }
1813
1814 if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) {
1815 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1816 memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len);
1817 adv->scan_rsp_len = scan_rsp_len;
1818 adv->scan_rsp_changed = true;
1819 }
1820
1821 /* Mark as changed if there are flags which would affect it */
1822 if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) ||
1823 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1824 adv->scan_rsp_changed = true;
1825
1826 return 0;
1827}
1828
1829/* This function requires the caller holds hdev->lock */
1830u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance)
1831{
1832 u32 flags;
1833 struct adv_info *adv;
1834
1835 if (instance == 0x00) {
1836 /* Instance 0 always manages the "Tx Power" and "Flags"
1837 * fields
1838 */
1839 flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
1840
1841 /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
1842 * corresponds to the "connectable" instance flag.
1843 */
1844 if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
1845 flags |= MGMT_ADV_FLAG_CONNECTABLE;
1846
1847 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
1848 flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
1849 else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
1850 flags |= MGMT_ADV_FLAG_DISCOV;
1851
1852 return flags;
1853 }
1854
1855 adv = hci_find_adv_instance(hdev, instance);
1856
1857 /* Return 0 when we got an invalid instance identifier. */
1858 if (!adv)
1859 return 0;
1860
1861 return adv->flags;
1862}
1863
1864bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance)
1865{
1866 struct adv_info *adv;
1867
1868 /* Instance 0x00 always set local name */
1869 if (instance == 0x00)
1870 return true;
1871
1872 adv = hci_find_adv_instance(hdev, instance);
1873 if (!adv)
1874 return false;
1875
1876 if (adv->flags & MGMT_ADV_FLAG_APPEARANCE ||
1877 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1878 return true;
1879
1880 return adv->scan_rsp_len ? true : false;
1881}
1882
1883/* This function requires the caller holds hdev->lock */
1884void hci_adv_monitors_clear(struct hci_dev *hdev)
1885{
1886 struct adv_monitor *monitor;
1887 int handle;
1888
1889 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
1890 hci_free_adv_monitor(hdev, monitor);
1891
1892 idr_destroy(&hdev->adv_monitors_idr);
1893}
1894
1895/* Frees the monitor structure and do some bookkeepings.
1896 * This function requires the caller holds hdev->lock.
1897 */
1898void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1899{
1900 struct adv_pattern *pattern;
1901 struct adv_pattern *tmp;
1902
1903 if (!monitor)
1904 return;
1905
1906 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
1907 list_del(&pattern->list);
1908 kfree(pattern);
1909 }
1910
1911 if (monitor->handle)
1912 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
1913
1914 if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
1915 hdev->adv_monitors_cnt--;
1916 mgmt_adv_monitor_removed(hdev, monitor->handle);
1917 }
1918
1919 kfree(monitor);
1920}
1921
1922/* Assigns handle to a monitor, and if offloading is supported and power is on,
1923 * also attempts to forward the request to the controller.
1924 * This function requires the caller holds hci_req_sync_lock.
1925 */
1926int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1927{
1928 int min, max, handle;
1929 int status = 0;
1930
1931 if (!monitor)
1932 return -EINVAL;
1933
1934 hci_dev_lock(hdev);
1935
1936 min = HCI_MIN_ADV_MONITOR_HANDLE;
1937 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
1938 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
1939 GFP_KERNEL);
1940
1941 hci_dev_unlock(hdev);
1942
1943 if (handle < 0)
1944 return handle;
1945
1946 monitor->handle = handle;
1947
1948 if (!hdev_is_powered(hdev))
1949 return status;
1950
1951 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1952 case HCI_ADV_MONITOR_EXT_NONE:
1953 bt_dev_dbg(hdev, "add monitor %d status %d",
1954 monitor->handle, status);
1955 /* Message was not forwarded to controller - not an error */
1956 break;
1957
1958 case HCI_ADV_MONITOR_EXT_MSFT:
1959 status = msft_add_monitor_pattern(hdev, monitor);
1960 bt_dev_dbg(hdev, "add monitor %d msft status %d",
1961 handle, status);
1962 break;
1963 }
1964
1965 return status;
1966}
1967
1968/* Attempts to tell the controller and free the monitor. If somehow the
1969 * controller doesn't have a corresponding handle, remove anyway.
1970 * This function requires the caller holds hci_req_sync_lock.
1971 */
1972static int hci_remove_adv_monitor(struct hci_dev *hdev,
1973 struct adv_monitor *monitor)
1974{
1975 int status = 0;
1976 int handle;
1977
1978 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1979 case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
1980 bt_dev_dbg(hdev, "remove monitor %d status %d",
1981 monitor->handle, status);
1982 goto free_monitor;
1983
1984 case HCI_ADV_MONITOR_EXT_MSFT:
1985 handle = monitor->handle;
1986 status = msft_remove_monitor(hdev, monitor);
1987 bt_dev_dbg(hdev, "remove monitor %d msft status %d",
1988 handle, status);
1989 break;
1990 }
1991
1992 /* In case no matching handle registered, just free the monitor */
1993 if (status == -ENOENT)
1994 goto free_monitor;
1995
1996 return status;
1997
1998free_monitor:
1999 if (status == -ENOENT)
2000 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
2001 monitor->handle);
2002 hci_free_adv_monitor(hdev, monitor);
2003
2004 return status;
2005}
2006
2007/* This function requires the caller holds hci_req_sync_lock */
2008int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle)
2009{
2010 struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
2011
2012 if (!monitor)
2013 return -EINVAL;
2014
2015 return hci_remove_adv_monitor(hdev, monitor);
2016}
2017
2018/* This function requires the caller holds hci_req_sync_lock */
2019int hci_remove_all_adv_monitor(struct hci_dev *hdev)
2020{
2021 struct adv_monitor *monitor;
2022 int idr_next_id = 0;
2023 int status = 0;
2024
2025 while (1) {
2026 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
2027 if (!monitor)
2028 break;
2029
2030 status = hci_remove_adv_monitor(hdev, monitor);
2031 if (status)
2032 return status;
2033
2034 idr_next_id++;
2035 }
2036
2037 return status;
2038}
2039
2040/* This function requires the caller holds hdev->lock */
2041bool hci_is_adv_monitoring(struct hci_dev *hdev)
2042{
2043 return !idr_is_empty(&hdev->adv_monitors_idr);
2044}
2045
2046int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
2047{
2048 if (msft_monitor_supported(hdev))
2049 return HCI_ADV_MONITOR_EXT_MSFT;
2050
2051 return HCI_ADV_MONITOR_EXT_NONE;
2052}
2053
2054struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2055 bdaddr_t *bdaddr, u8 type)
2056{
2057 struct bdaddr_list *b;
2058
2059 list_for_each_entry(b, bdaddr_list, list) {
2060 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2061 return b;
2062 }
2063
2064 return NULL;
2065}
2066
2067struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2068 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2069 u8 type)
2070{
2071 struct bdaddr_list_with_irk *b;
2072
2073 list_for_each_entry(b, bdaddr_list, list) {
2074 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2075 return b;
2076 }
2077
2078 return NULL;
2079}
2080
2081struct bdaddr_list_with_flags *
2082hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
2083 bdaddr_t *bdaddr, u8 type)
2084{
2085 struct bdaddr_list_with_flags *b;
2086
2087 list_for_each_entry(b, bdaddr_list, list) {
2088 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2089 return b;
2090 }
2091
2092 return NULL;
2093}
2094
2095void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2096{
2097 struct bdaddr_list *b, *n;
2098
2099 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2100 list_del(&b->list);
2101 kfree(b);
2102 }
2103}
2104
2105int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2106{
2107 struct bdaddr_list *entry;
2108
2109 if (!bacmp(bdaddr, BDADDR_ANY))
2110 return -EBADF;
2111
2112 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2113 return -EEXIST;
2114
2115 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2116 if (!entry)
2117 return -ENOMEM;
2118
2119 bacpy(&entry->bdaddr, bdaddr);
2120 entry->bdaddr_type = type;
2121
2122 list_add(&entry->list, list);
2123
2124 return 0;
2125}
2126
2127int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2128 u8 type, u8 *peer_irk, u8 *local_irk)
2129{
2130 struct bdaddr_list_with_irk *entry;
2131
2132 if (!bacmp(bdaddr, BDADDR_ANY))
2133 return -EBADF;
2134
2135 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2136 return -EEXIST;
2137
2138 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2139 if (!entry)
2140 return -ENOMEM;
2141
2142 bacpy(&entry->bdaddr, bdaddr);
2143 entry->bdaddr_type = type;
2144
2145 if (peer_irk)
2146 memcpy(entry->peer_irk, peer_irk, 16);
2147
2148 if (local_irk)
2149 memcpy(entry->local_irk, local_irk, 16);
2150
2151 list_add(&entry->list, list);
2152
2153 return 0;
2154}
2155
2156int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2157 u8 type, u32 flags)
2158{
2159 struct bdaddr_list_with_flags *entry;
2160
2161 if (!bacmp(bdaddr, BDADDR_ANY))
2162 return -EBADF;
2163
2164 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2165 return -EEXIST;
2166
2167 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2168 if (!entry)
2169 return -ENOMEM;
2170
2171 bacpy(&entry->bdaddr, bdaddr);
2172 entry->bdaddr_type = type;
2173 entry->flags = flags;
2174
2175 list_add(&entry->list, list);
2176
2177 return 0;
2178}
2179
2180int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2181{
2182 struct bdaddr_list *entry;
2183
2184 if (!bacmp(bdaddr, BDADDR_ANY)) {
2185 hci_bdaddr_list_clear(list);
2186 return 0;
2187 }
2188
2189 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2190 if (!entry)
2191 return -ENOENT;
2192
2193 list_del(&entry->list);
2194 kfree(entry);
2195
2196 return 0;
2197}
2198
2199int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2200 u8 type)
2201{
2202 struct bdaddr_list_with_irk *entry;
2203
2204 if (!bacmp(bdaddr, BDADDR_ANY)) {
2205 hci_bdaddr_list_clear(list);
2206 return 0;
2207 }
2208
2209 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2210 if (!entry)
2211 return -ENOENT;
2212
2213 list_del(&entry->list);
2214 kfree(entry);
2215
2216 return 0;
2217}
2218
2219int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2220 u8 type)
2221{
2222 struct bdaddr_list_with_flags *entry;
2223
2224 if (!bacmp(bdaddr, BDADDR_ANY)) {
2225 hci_bdaddr_list_clear(list);
2226 return 0;
2227 }
2228
2229 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
2230 if (!entry)
2231 return -ENOENT;
2232
2233 list_del(&entry->list);
2234 kfree(entry);
2235
2236 return 0;
2237}
2238
2239/* This function requires the caller holds hdev->lock */
2240struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2241 bdaddr_t *addr, u8 addr_type)
2242{
2243 struct hci_conn_params *params;
2244
2245 list_for_each_entry(params, &hdev->le_conn_params, list) {
2246 if (bacmp(¶ms->addr, addr) == 0 &&
2247 params->addr_type == addr_type) {
2248 return params;
2249 }
2250 }
2251
2252 return NULL;
2253}
2254
2255/* This function requires the caller holds hdev->lock or rcu_read_lock */
2256struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2257 bdaddr_t *addr, u8 addr_type)
2258{
2259 struct hci_conn_params *param;
2260
2261 rcu_read_lock();
2262
2263 list_for_each_entry_rcu(param, list, action) {
2264 if (bacmp(¶m->addr, addr) == 0 &&
2265 param->addr_type == addr_type) {
2266 rcu_read_unlock();
2267 return param;
2268 }
2269 }
2270
2271 rcu_read_unlock();
2272
2273 return NULL;
2274}
2275
2276/* This function requires the caller holds hdev->lock */
2277void hci_pend_le_list_del_init(struct hci_conn_params *param)
2278{
2279 if (list_empty(¶m->action))
2280 return;
2281
2282 list_del_rcu(¶m->action);
2283 synchronize_rcu();
2284 INIT_LIST_HEAD(¶m->action);
2285}
2286
2287/* This function requires the caller holds hdev->lock */
2288void hci_pend_le_list_add(struct hci_conn_params *param,
2289 struct list_head *list)
2290{
2291 list_add_rcu(¶m->action, list);
2292}
2293
2294/* This function requires the caller holds hdev->lock */
2295struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2296 bdaddr_t *addr, u8 addr_type)
2297{
2298 struct hci_conn_params *params;
2299
2300 params = hci_conn_params_lookup(hdev, addr, addr_type);
2301 if (params)
2302 return params;
2303
2304 params = kzalloc(sizeof(*params), GFP_KERNEL);
2305 if (!params) {
2306 bt_dev_err(hdev, "out of memory");
2307 return NULL;
2308 }
2309
2310 bacpy(¶ms->addr, addr);
2311 params->addr_type = addr_type;
2312
2313 list_add(¶ms->list, &hdev->le_conn_params);
2314 INIT_LIST_HEAD(¶ms->action);
2315
2316 params->conn_min_interval = hdev->le_conn_min_interval;
2317 params->conn_max_interval = hdev->le_conn_max_interval;
2318 params->conn_latency = hdev->le_conn_latency;
2319 params->supervision_timeout = hdev->le_supv_timeout;
2320 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2321
2322 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2323
2324 return params;
2325}
2326
2327void hci_conn_params_free(struct hci_conn_params *params)
2328{
2329 hci_pend_le_list_del_init(params);
2330
2331 if (params->conn) {
2332 hci_conn_drop(params->conn);
2333 hci_conn_put(params->conn);
2334 }
2335
2336 list_del(¶ms->list);
2337 kfree(params);
2338}
2339
2340/* This function requires the caller holds hdev->lock */
2341void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2342{
2343 struct hci_conn_params *params;
2344
2345 params = hci_conn_params_lookup(hdev, addr, addr_type);
2346 if (!params)
2347 return;
2348
2349 hci_conn_params_free(params);
2350
2351 hci_update_passive_scan(hdev);
2352
2353 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2354}
2355
2356/* This function requires the caller holds hdev->lock */
2357void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2358{
2359 struct hci_conn_params *params, *tmp;
2360
2361 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2362 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2363 continue;
2364
2365 /* If trying to establish one time connection to disabled
2366 * device, leave the params, but mark them as just once.
2367 */
2368 if (params->explicit_connect) {
2369 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2370 continue;
2371 }
2372
2373 hci_conn_params_free(params);
2374 }
2375
2376 BT_DBG("All LE disabled connection parameters were removed");
2377}
2378
2379/* This function requires the caller holds hdev->lock */
2380static void hci_conn_params_clear_all(struct hci_dev *hdev)
2381{
2382 struct hci_conn_params *params, *tmp;
2383
2384 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2385 hci_conn_params_free(params);
2386
2387 BT_DBG("All LE connection parameters were removed");
2388}
2389
2390/* Copy the Identity Address of the controller.
2391 *
2392 * If the controller has a public BD_ADDR, then by default use that one.
2393 * If this is a LE only controller without a public address, default to
2394 * the static random address.
2395 *
2396 * For debugging purposes it is possible to force controllers with a
2397 * public address to use the static random address instead.
2398 *
2399 * In case BR/EDR has been disabled on a dual-mode controller and
2400 * userspace has configured a static address, then that address
2401 * becomes the identity address instead of the public BR/EDR address.
2402 */
2403void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2404 u8 *bdaddr_type)
2405{
2406 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2407 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2408 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2409 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2410 bacpy(bdaddr, &hdev->static_addr);
2411 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2412 } else {
2413 bacpy(bdaddr, &hdev->bdaddr);
2414 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2415 }
2416}
2417
2418static void hci_clear_wake_reason(struct hci_dev *hdev)
2419{
2420 hci_dev_lock(hdev);
2421
2422 hdev->wake_reason = 0;
2423 bacpy(&hdev->wake_addr, BDADDR_ANY);
2424 hdev->wake_addr_type = 0;
2425
2426 hci_dev_unlock(hdev);
2427}
2428
2429static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
2430 void *data)
2431{
2432 struct hci_dev *hdev =
2433 container_of(nb, struct hci_dev, suspend_notifier);
2434 int ret = 0;
2435
2436 /* Userspace has full control of this device. Do nothing. */
2437 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2438 return NOTIFY_DONE;
2439
2440 /* To avoid a potential race with hci_unregister_dev. */
2441 hci_dev_hold(hdev);
2442
2443 if (action == PM_SUSPEND_PREPARE)
2444 ret = hci_suspend_dev(hdev);
2445 else if (action == PM_POST_SUSPEND)
2446 ret = hci_resume_dev(hdev);
2447
2448 if (ret)
2449 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
2450 action, ret);
2451
2452 hci_dev_put(hdev);
2453 return NOTIFY_DONE;
2454}
2455
2456/* Alloc HCI device */
2457struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
2458{
2459 struct hci_dev *hdev;
2460 unsigned int alloc_size;
2461
2462 alloc_size = sizeof(*hdev);
2463 if (sizeof_priv) {
2464 /* Fixme: May need ALIGN-ment? */
2465 alloc_size += sizeof_priv;
2466 }
2467
2468 hdev = kzalloc(alloc_size, GFP_KERNEL);
2469 if (!hdev)
2470 return NULL;
2471
2472 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2473 hdev->esco_type = (ESCO_HV1);
2474 hdev->link_mode = (HCI_LM_ACCEPT);
2475 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2476 hdev->io_capability = 0x03; /* No Input No Output */
2477 hdev->manufacturer = 0xffff; /* Default to internal use */
2478 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2479 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2480 hdev->adv_instance_cnt = 0;
2481 hdev->cur_adv_instance = 0x00;
2482 hdev->adv_instance_timeout = 0;
2483
2484 hdev->advmon_allowlist_duration = 300;
2485 hdev->advmon_no_filter_duration = 500;
2486 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
2487
2488 hdev->sniff_max_interval = 800;
2489 hdev->sniff_min_interval = 80;
2490
2491 hdev->le_adv_channel_map = 0x07;
2492 hdev->le_adv_min_interval = 0x0800;
2493 hdev->le_adv_max_interval = 0x0800;
2494 hdev->le_scan_interval = 0x0060;
2495 hdev->le_scan_window = 0x0030;
2496 hdev->le_scan_int_suspend = 0x0400;
2497 hdev->le_scan_window_suspend = 0x0012;
2498 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
2499 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
2500 hdev->le_scan_int_adv_monitor = 0x0060;
2501 hdev->le_scan_window_adv_monitor = 0x0030;
2502 hdev->le_scan_int_connect = 0x0060;
2503 hdev->le_scan_window_connect = 0x0060;
2504 hdev->le_conn_min_interval = 0x0018;
2505 hdev->le_conn_max_interval = 0x0028;
2506 hdev->le_conn_latency = 0x0000;
2507 hdev->le_supv_timeout = 0x002a;
2508 hdev->le_def_tx_len = 0x001b;
2509 hdev->le_def_tx_time = 0x0148;
2510 hdev->le_max_tx_len = 0x001b;
2511 hdev->le_max_tx_time = 0x0148;
2512 hdev->le_max_rx_len = 0x001b;
2513 hdev->le_max_rx_time = 0x0148;
2514 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
2515 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
2516 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
2517 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
2518 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
2519 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
2520 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
2521 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
2522 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
2523
2524 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2525 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2526 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2527 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2528 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
2529 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
2530
2531 /* default 1.28 sec page scan */
2532 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
2533 hdev->def_page_scan_int = 0x0800;
2534 hdev->def_page_scan_window = 0x0012;
2535
2536 mutex_init(&hdev->lock);
2537 mutex_init(&hdev->req_lock);
2538
2539 ida_init(&hdev->unset_handle_ida);
2540
2541 INIT_LIST_HEAD(&hdev->mesh_pending);
2542 INIT_LIST_HEAD(&hdev->mgmt_pending);
2543 INIT_LIST_HEAD(&hdev->reject_list);
2544 INIT_LIST_HEAD(&hdev->accept_list);
2545 INIT_LIST_HEAD(&hdev->uuids);
2546 INIT_LIST_HEAD(&hdev->link_keys);
2547 INIT_LIST_HEAD(&hdev->long_term_keys);
2548 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2549 INIT_LIST_HEAD(&hdev->remote_oob_data);
2550 INIT_LIST_HEAD(&hdev->le_accept_list);
2551 INIT_LIST_HEAD(&hdev->le_resolv_list);
2552 INIT_LIST_HEAD(&hdev->le_conn_params);
2553 INIT_LIST_HEAD(&hdev->pend_le_conns);
2554 INIT_LIST_HEAD(&hdev->pend_le_reports);
2555 INIT_LIST_HEAD(&hdev->conn_hash.list);
2556 INIT_LIST_HEAD(&hdev->adv_instances);
2557 INIT_LIST_HEAD(&hdev->blocked_keys);
2558 INIT_LIST_HEAD(&hdev->monitored_devices);
2559
2560 INIT_LIST_HEAD(&hdev->local_codecs);
2561 INIT_WORK(&hdev->rx_work, hci_rx_work);
2562 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2563 INIT_WORK(&hdev->tx_work, hci_tx_work);
2564 INIT_WORK(&hdev->power_on, hci_power_on);
2565 INIT_WORK(&hdev->error_reset, hci_error_reset);
2566
2567 hci_cmd_sync_init(hdev);
2568
2569 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2570
2571 skb_queue_head_init(&hdev->rx_q);
2572 skb_queue_head_init(&hdev->cmd_q);
2573 skb_queue_head_init(&hdev->raw_q);
2574
2575 init_waitqueue_head(&hdev->req_wait_q);
2576
2577 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
2578 INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
2579
2580 hci_devcd_setup(hdev);
2581 hci_request_setup(hdev);
2582
2583 hci_init_sysfs(hdev);
2584 discovery_init(hdev);
2585
2586 return hdev;
2587}
2588EXPORT_SYMBOL(hci_alloc_dev_priv);
2589
2590/* Free HCI device */
2591void hci_free_dev(struct hci_dev *hdev)
2592{
2593 /* will free via device release */
2594 put_device(&hdev->dev);
2595}
2596EXPORT_SYMBOL(hci_free_dev);
2597
2598/* Register HCI device */
2599int hci_register_dev(struct hci_dev *hdev)
2600{
2601 int id, error;
2602
2603 if (!hdev->open || !hdev->close || !hdev->send)
2604 return -EINVAL;
2605
2606 /* Do not allow HCI_AMP devices to register at index 0,
2607 * so the index can be used as the AMP controller ID.
2608 */
2609 switch (hdev->dev_type) {
2610 case HCI_PRIMARY:
2611 id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL);
2612 break;
2613 case HCI_AMP:
2614 id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL);
2615 break;
2616 default:
2617 return -EINVAL;
2618 }
2619
2620 if (id < 0)
2621 return id;
2622
2623 error = dev_set_name(&hdev->dev, "hci%u", id);
2624 if (error)
2625 return error;
2626
2627 hdev->name = dev_name(&hdev->dev);
2628 hdev->id = id;
2629
2630 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2631
2632 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
2633 if (!hdev->workqueue) {
2634 error = -ENOMEM;
2635 goto err;
2636 }
2637
2638 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
2639 hdev->name);
2640 if (!hdev->req_workqueue) {
2641 destroy_workqueue(hdev->workqueue);
2642 error = -ENOMEM;
2643 goto err;
2644 }
2645
2646 if (!IS_ERR_OR_NULL(bt_debugfs))
2647 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
2648
2649 error = device_add(&hdev->dev);
2650 if (error < 0)
2651 goto err_wqueue;
2652
2653 hci_leds_init(hdev);
2654
2655 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2656 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2657 hdev);
2658 if (hdev->rfkill) {
2659 if (rfkill_register(hdev->rfkill) < 0) {
2660 rfkill_destroy(hdev->rfkill);
2661 hdev->rfkill = NULL;
2662 }
2663 }
2664
2665 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2666 hci_dev_set_flag(hdev, HCI_RFKILLED);
2667
2668 hci_dev_set_flag(hdev, HCI_SETUP);
2669 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
2670
2671 if (hdev->dev_type == HCI_PRIMARY) {
2672 /* Assume BR/EDR support until proven otherwise (such as
2673 * through reading supported features during init.
2674 */
2675 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
2676 }
2677
2678 write_lock(&hci_dev_list_lock);
2679 list_add(&hdev->list, &hci_dev_list);
2680 write_unlock(&hci_dev_list_lock);
2681
2682 /* Devices that are marked for raw-only usage are unconfigured
2683 * and should not be included in normal operation.
2684 */
2685 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2686 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
2687
2688 /* Mark Remote Wakeup connection flag as supported if driver has wakeup
2689 * callback.
2690 */
2691 if (hdev->wakeup)
2692 hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
2693
2694 hci_sock_dev_event(hdev, HCI_DEV_REG);
2695 hci_dev_hold(hdev);
2696
2697 error = hci_register_suspend_notifier(hdev);
2698 if (error)
2699 BT_WARN("register suspend notifier failed error:%d\n", error);
2700
2701 queue_work(hdev->req_workqueue, &hdev->power_on);
2702
2703 idr_init(&hdev->adv_monitors_idr);
2704 msft_register(hdev);
2705
2706 return id;
2707
2708err_wqueue:
2709 debugfs_remove_recursive(hdev->debugfs);
2710 destroy_workqueue(hdev->workqueue);
2711 destroy_workqueue(hdev->req_workqueue);
2712err:
2713 ida_simple_remove(&hci_index_ida, hdev->id);
2714
2715 return error;
2716}
2717EXPORT_SYMBOL(hci_register_dev);
2718
2719/* Unregister HCI device */
2720void hci_unregister_dev(struct hci_dev *hdev)
2721{
2722 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2723
2724 mutex_lock(&hdev->unregister_lock);
2725 hci_dev_set_flag(hdev, HCI_UNREGISTER);
2726 mutex_unlock(&hdev->unregister_lock);
2727
2728 write_lock(&hci_dev_list_lock);
2729 list_del(&hdev->list);
2730 write_unlock(&hci_dev_list_lock);
2731
2732 cancel_work_sync(&hdev->power_on);
2733
2734 hci_cmd_sync_clear(hdev);
2735
2736 hci_unregister_suspend_notifier(hdev);
2737
2738 msft_unregister(hdev);
2739
2740 hci_dev_do_close(hdev);
2741
2742 if (!test_bit(HCI_INIT, &hdev->flags) &&
2743 !hci_dev_test_flag(hdev, HCI_SETUP) &&
2744 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
2745 hci_dev_lock(hdev);
2746 mgmt_index_removed(hdev);
2747 hci_dev_unlock(hdev);
2748 }
2749
2750 /* mgmt_index_removed should take care of emptying the
2751 * pending list */
2752 BUG_ON(!list_empty(&hdev->mgmt_pending));
2753
2754 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
2755
2756 if (hdev->rfkill) {
2757 rfkill_unregister(hdev->rfkill);
2758 rfkill_destroy(hdev->rfkill);
2759 }
2760
2761 device_del(&hdev->dev);
2762 /* Actual cleanup is deferred until hci_release_dev(). */
2763 hci_dev_put(hdev);
2764}
2765EXPORT_SYMBOL(hci_unregister_dev);
2766
2767/* Release HCI device */
2768void hci_release_dev(struct hci_dev *hdev)
2769{
2770 debugfs_remove_recursive(hdev->debugfs);
2771 kfree_const(hdev->hw_info);
2772 kfree_const(hdev->fw_info);
2773
2774 destroy_workqueue(hdev->workqueue);
2775 destroy_workqueue(hdev->req_workqueue);
2776
2777 hci_dev_lock(hdev);
2778 hci_bdaddr_list_clear(&hdev->reject_list);
2779 hci_bdaddr_list_clear(&hdev->accept_list);
2780 hci_uuids_clear(hdev);
2781 hci_link_keys_clear(hdev);
2782 hci_smp_ltks_clear(hdev);
2783 hci_smp_irks_clear(hdev);
2784 hci_remote_oob_data_clear(hdev);
2785 hci_adv_instances_clear(hdev);
2786 hci_adv_monitors_clear(hdev);
2787 hci_bdaddr_list_clear(&hdev->le_accept_list);
2788 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2789 hci_conn_params_clear_all(hdev);
2790 hci_discovery_filter_clear(hdev);
2791 hci_blocked_keys_clear(hdev);
2792 hci_codec_list_clear(&hdev->local_codecs);
2793 hci_dev_unlock(hdev);
2794
2795 ida_destroy(&hdev->unset_handle_ida);
2796 ida_simple_remove(&hci_index_ida, hdev->id);
2797 kfree_skb(hdev->sent_cmd);
2798 kfree_skb(hdev->recv_event);
2799 kfree(hdev);
2800}
2801EXPORT_SYMBOL(hci_release_dev);
2802
2803int hci_register_suspend_notifier(struct hci_dev *hdev)
2804{
2805 int ret = 0;
2806
2807 if (!hdev->suspend_notifier.notifier_call &&
2808 !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
2809 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
2810 ret = register_pm_notifier(&hdev->suspend_notifier);
2811 }
2812
2813 return ret;
2814}
2815
2816int hci_unregister_suspend_notifier(struct hci_dev *hdev)
2817{
2818 int ret = 0;
2819
2820 if (hdev->suspend_notifier.notifier_call) {
2821 ret = unregister_pm_notifier(&hdev->suspend_notifier);
2822 if (!ret)
2823 hdev->suspend_notifier.notifier_call = NULL;
2824 }
2825
2826 return ret;
2827}
2828
2829/* Suspend HCI device */
2830int hci_suspend_dev(struct hci_dev *hdev)
2831{
2832 int ret;
2833
2834 bt_dev_dbg(hdev, "");
2835
2836 /* Suspend should only act on when powered. */
2837 if (!hdev_is_powered(hdev) ||
2838 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2839 return 0;
2840
2841 /* If powering down don't attempt to suspend */
2842 if (mgmt_powering_down(hdev))
2843 return 0;
2844
2845 /* Cancel potentially blocking sync operation before suspend */
2846 __hci_cmd_sync_cancel(hdev, -EHOSTDOWN);
2847
2848 hci_req_sync_lock(hdev);
2849 ret = hci_suspend_sync(hdev);
2850 hci_req_sync_unlock(hdev);
2851
2852 hci_clear_wake_reason(hdev);
2853 mgmt_suspending(hdev, hdev->suspend_state);
2854
2855 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
2856 return ret;
2857}
2858EXPORT_SYMBOL(hci_suspend_dev);
2859
2860/* Resume HCI device */
2861int hci_resume_dev(struct hci_dev *hdev)
2862{
2863 int ret;
2864
2865 bt_dev_dbg(hdev, "");
2866
2867 /* Resume should only act on when powered. */
2868 if (!hdev_is_powered(hdev) ||
2869 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2870 return 0;
2871
2872 /* If powering down don't attempt to resume */
2873 if (mgmt_powering_down(hdev))
2874 return 0;
2875
2876 hci_req_sync_lock(hdev);
2877 ret = hci_resume_sync(hdev);
2878 hci_req_sync_unlock(hdev);
2879
2880 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
2881 hdev->wake_addr_type);
2882
2883 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
2884 return ret;
2885}
2886EXPORT_SYMBOL(hci_resume_dev);
2887
2888/* Reset HCI device */
2889int hci_reset_dev(struct hci_dev *hdev)
2890{
2891 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
2892 struct sk_buff *skb;
2893
2894 skb = bt_skb_alloc(3, GFP_ATOMIC);
2895 if (!skb)
2896 return -ENOMEM;
2897
2898 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2899 skb_put_data(skb, hw_err, 3);
2900
2901 bt_dev_err(hdev, "Injecting HCI hardware error event");
2902
2903 /* Send Hardware Error to upper stack */
2904 return hci_recv_frame(hdev, skb);
2905}
2906EXPORT_SYMBOL(hci_reset_dev);
2907
2908/* Receive frame from HCI drivers */
2909int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
2910{
2911 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2912 && !test_bit(HCI_INIT, &hdev->flags))) {
2913 kfree_skb(skb);
2914 return -ENXIO;
2915 }
2916
2917 switch (hci_skb_pkt_type(skb)) {
2918 case HCI_EVENT_PKT:
2919 break;
2920 case HCI_ACLDATA_PKT:
2921 /* Detect if ISO packet has been sent as ACL */
2922 if (hci_conn_num(hdev, ISO_LINK)) {
2923 __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
2924 __u8 type;
2925
2926 type = hci_conn_lookup_type(hdev, hci_handle(handle));
2927 if (type == ISO_LINK)
2928 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
2929 }
2930 break;
2931 case HCI_SCODATA_PKT:
2932 break;
2933 case HCI_ISODATA_PKT:
2934 break;
2935 default:
2936 kfree_skb(skb);
2937 return -EINVAL;
2938 }
2939
2940 /* Incoming skb */
2941 bt_cb(skb)->incoming = 1;
2942
2943 /* Time stamp */
2944 __net_timestamp(skb);
2945
2946 skb_queue_tail(&hdev->rx_q, skb);
2947 queue_work(hdev->workqueue, &hdev->rx_work);
2948
2949 return 0;
2950}
2951EXPORT_SYMBOL(hci_recv_frame);
2952
2953/* Receive diagnostic message from HCI drivers */
2954int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
2955{
2956 /* Mark as diagnostic packet */
2957 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
2958
2959 /* Time stamp */
2960 __net_timestamp(skb);
2961
2962 skb_queue_tail(&hdev->rx_q, skb);
2963 queue_work(hdev->workqueue, &hdev->rx_work);
2964
2965 return 0;
2966}
2967EXPORT_SYMBOL(hci_recv_diag);
2968
2969void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
2970{
2971 va_list vargs;
2972
2973 va_start(vargs, fmt);
2974 kfree_const(hdev->hw_info);
2975 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2976 va_end(vargs);
2977}
2978EXPORT_SYMBOL(hci_set_hw_info);
2979
2980void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
2981{
2982 va_list vargs;
2983
2984 va_start(vargs, fmt);
2985 kfree_const(hdev->fw_info);
2986 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2987 va_end(vargs);
2988}
2989EXPORT_SYMBOL(hci_set_fw_info);
2990
2991/* ---- Interface to upper protocols ---- */
2992
2993int hci_register_cb(struct hci_cb *cb)
2994{
2995 BT_DBG("%p name %s", cb, cb->name);
2996
2997 mutex_lock(&hci_cb_list_lock);
2998 list_add_tail(&cb->list, &hci_cb_list);
2999 mutex_unlock(&hci_cb_list_lock);
3000
3001 return 0;
3002}
3003EXPORT_SYMBOL(hci_register_cb);
3004
3005int hci_unregister_cb(struct hci_cb *cb)
3006{
3007 BT_DBG("%p name %s", cb, cb->name);
3008
3009 mutex_lock(&hci_cb_list_lock);
3010 list_del(&cb->list);
3011 mutex_unlock(&hci_cb_list_lock);
3012
3013 return 0;
3014}
3015EXPORT_SYMBOL(hci_unregister_cb);
3016
3017static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3018{
3019 int err;
3020
3021 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3022 skb->len);
3023
3024 /* Time stamp */
3025 __net_timestamp(skb);
3026
3027 /* Send copy to monitor */
3028 hci_send_to_monitor(hdev, skb);
3029
3030 if (atomic_read(&hdev->promisc)) {
3031 /* Send copy to the sockets */
3032 hci_send_to_sock(hdev, skb);
3033 }
3034
3035 /* Get rid of skb owner, prior to sending to the driver. */
3036 skb_orphan(skb);
3037
3038 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3039 kfree_skb(skb);
3040 return -EINVAL;
3041 }
3042
3043 err = hdev->send(hdev, skb);
3044 if (err < 0) {
3045 bt_dev_err(hdev, "sending frame failed (%d)", err);
3046 kfree_skb(skb);
3047 return err;
3048 }
3049
3050 return 0;
3051}
3052
3053/* Send HCI command */
3054int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3055 const void *param)
3056{
3057 struct sk_buff *skb;
3058
3059 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3060
3061 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3062 if (!skb) {
3063 bt_dev_err(hdev, "no memory for command");
3064 return -ENOMEM;
3065 }
3066
3067 /* Stand-alone HCI commands must be flagged as
3068 * single-command requests.
3069 */
3070 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3071
3072 skb_queue_tail(&hdev->cmd_q, skb);
3073 queue_work(hdev->workqueue, &hdev->cmd_work);
3074
3075 return 0;
3076}
3077
3078int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3079 const void *param)
3080{
3081 struct sk_buff *skb;
3082
3083 if (hci_opcode_ogf(opcode) != 0x3f) {
3084 /* A controller receiving a command shall respond with either
3085 * a Command Status Event or a Command Complete Event.
3086 * Therefore, all standard HCI commands must be sent via the
3087 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3088 * Some vendors do not comply with this rule for vendor-specific
3089 * commands and do not return any event. We want to support
3090 * unresponded commands for such cases only.
3091 */
3092 bt_dev_err(hdev, "unresponded command not supported");
3093 return -EINVAL;
3094 }
3095
3096 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3097 if (!skb) {
3098 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3099 opcode);
3100 return -ENOMEM;
3101 }
3102
3103 hci_send_frame(hdev, skb);
3104
3105 return 0;
3106}
3107EXPORT_SYMBOL(__hci_cmd_send);
3108
3109/* Get data from the previously sent command */
3110void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3111{
3112 struct hci_command_hdr *hdr;
3113
3114 if (!hdev->sent_cmd)
3115 return NULL;
3116
3117 hdr = (void *) hdev->sent_cmd->data;
3118
3119 if (hdr->opcode != cpu_to_le16(opcode))
3120 return NULL;
3121
3122 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3123
3124 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3125}
3126
3127/* Get data from last received event */
3128void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
3129{
3130 struct hci_event_hdr *hdr;
3131 int offset;
3132
3133 if (!hdev->recv_event)
3134 return NULL;
3135
3136 hdr = (void *)hdev->recv_event->data;
3137 offset = sizeof(*hdr);
3138
3139 if (hdr->evt != event) {
3140 /* In case of LE metaevent check the subevent match */
3141 if (hdr->evt == HCI_EV_LE_META) {
3142 struct hci_ev_le_meta *ev;
3143
3144 ev = (void *)hdev->recv_event->data + offset;
3145 offset += sizeof(*ev);
3146 if (ev->subevent == event)
3147 goto found;
3148 }
3149 return NULL;
3150 }
3151
3152found:
3153 bt_dev_dbg(hdev, "event 0x%2.2x", event);
3154
3155 return hdev->recv_event->data + offset;
3156}
3157
3158/* Send ACL data */
3159static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3160{
3161 struct hci_acl_hdr *hdr;
3162 int len = skb->len;
3163
3164 skb_push(skb, HCI_ACL_HDR_SIZE);
3165 skb_reset_transport_header(skb);
3166 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3167 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3168 hdr->dlen = cpu_to_le16(len);
3169}
3170
3171static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3172 struct sk_buff *skb, __u16 flags)
3173{
3174 struct hci_conn *conn = chan->conn;
3175 struct hci_dev *hdev = conn->hdev;
3176 struct sk_buff *list;
3177
3178 skb->len = skb_headlen(skb);
3179 skb->data_len = 0;
3180
3181 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3182
3183 switch (hdev->dev_type) {
3184 case HCI_PRIMARY:
3185 hci_add_acl_hdr(skb, conn->handle, flags);
3186 break;
3187 case HCI_AMP:
3188 hci_add_acl_hdr(skb, chan->handle, flags);
3189 break;
3190 default:
3191 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3192 return;
3193 }
3194
3195 list = skb_shinfo(skb)->frag_list;
3196 if (!list) {
3197 /* Non fragmented */
3198 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3199
3200 skb_queue_tail(queue, skb);
3201 } else {
3202 /* Fragmented */
3203 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3204
3205 skb_shinfo(skb)->frag_list = NULL;
3206
3207 /* Queue all fragments atomically. We need to use spin_lock_bh
3208 * here because of 6LoWPAN links, as there this function is
3209 * called from softirq and using normal spin lock could cause
3210 * deadlocks.
3211 */
3212 spin_lock_bh(&queue->lock);
3213
3214 __skb_queue_tail(queue, skb);
3215
3216 flags &= ~ACL_START;
3217 flags |= ACL_CONT;
3218 do {
3219 skb = list; list = list->next;
3220
3221 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3222 hci_add_acl_hdr(skb, conn->handle, flags);
3223
3224 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3225
3226 __skb_queue_tail(queue, skb);
3227 } while (list);
3228
3229 spin_unlock_bh(&queue->lock);
3230 }
3231}
3232
3233void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3234{
3235 struct hci_dev *hdev = chan->conn->hdev;
3236
3237 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3238
3239 hci_queue_acl(chan, &chan->data_q, skb, flags);
3240
3241 queue_work(hdev->workqueue, &hdev->tx_work);
3242}
3243
3244/* Send SCO data */
3245void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3246{
3247 struct hci_dev *hdev = conn->hdev;
3248 struct hci_sco_hdr hdr;
3249
3250 BT_DBG("%s len %d", hdev->name, skb->len);
3251
3252 hdr.handle = cpu_to_le16(conn->handle);
3253 hdr.dlen = skb->len;
3254
3255 skb_push(skb, HCI_SCO_HDR_SIZE);
3256 skb_reset_transport_header(skb);
3257 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3258
3259 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3260
3261 skb_queue_tail(&conn->data_q, skb);
3262 queue_work(hdev->workqueue, &hdev->tx_work);
3263}
3264
3265/* Send ISO data */
3266static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
3267{
3268 struct hci_iso_hdr *hdr;
3269 int len = skb->len;
3270
3271 skb_push(skb, HCI_ISO_HDR_SIZE);
3272 skb_reset_transport_header(skb);
3273 hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
3274 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3275 hdr->dlen = cpu_to_le16(len);
3276}
3277
3278static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
3279 struct sk_buff *skb)
3280{
3281 struct hci_dev *hdev = conn->hdev;
3282 struct sk_buff *list;
3283 __u16 flags;
3284
3285 skb->len = skb_headlen(skb);
3286 skb->data_len = 0;
3287
3288 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3289
3290 list = skb_shinfo(skb)->frag_list;
3291
3292 flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
3293 hci_add_iso_hdr(skb, conn->handle, flags);
3294
3295 if (!list) {
3296 /* Non fragmented */
3297 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3298
3299 skb_queue_tail(queue, skb);
3300 } else {
3301 /* Fragmented */
3302 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3303
3304 skb_shinfo(skb)->frag_list = NULL;
3305
3306 __skb_queue_tail(queue, skb);
3307
3308 do {
3309 skb = list; list = list->next;
3310
3311 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3312 flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
3313 0x00);
3314 hci_add_iso_hdr(skb, conn->handle, flags);
3315
3316 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3317
3318 __skb_queue_tail(queue, skb);
3319 } while (list);
3320 }
3321}
3322
3323void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
3324{
3325 struct hci_dev *hdev = conn->hdev;
3326
3327 BT_DBG("%s len %d", hdev->name, skb->len);
3328
3329 hci_queue_iso(conn, &conn->data_q, skb);
3330
3331 queue_work(hdev->workqueue, &hdev->tx_work);
3332}
3333
3334/* ---- HCI TX task (outgoing data) ---- */
3335
3336/* HCI Connection scheduler */
3337static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
3338{
3339 struct hci_dev *hdev;
3340 int cnt, q;
3341
3342 if (!conn) {
3343 *quote = 0;
3344 return;
3345 }
3346
3347 hdev = conn->hdev;
3348
3349 switch (conn->type) {
3350 case ACL_LINK:
3351 cnt = hdev->acl_cnt;
3352 break;
3353 case AMP_LINK:
3354 cnt = hdev->block_cnt;
3355 break;
3356 case SCO_LINK:
3357 case ESCO_LINK:
3358 cnt = hdev->sco_cnt;
3359 break;
3360 case LE_LINK:
3361 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3362 break;
3363 case ISO_LINK:
3364 cnt = hdev->iso_mtu ? hdev->iso_cnt :
3365 hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3366 break;
3367 default:
3368 cnt = 0;
3369 bt_dev_err(hdev, "unknown link type %d", conn->type);
3370 }
3371
3372 q = cnt / num;
3373 *quote = q ? q : 1;
3374}
3375
3376static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3377 int *quote)
3378{
3379 struct hci_conn_hash *h = &hdev->conn_hash;
3380 struct hci_conn *conn = NULL, *c;
3381 unsigned int num = 0, min = ~0;
3382
3383 /* We don't have to lock device here. Connections are always
3384 * added and removed with TX task disabled. */
3385
3386 rcu_read_lock();
3387
3388 list_for_each_entry_rcu(c, &h->list, list) {
3389 if (c->type != type || skb_queue_empty(&c->data_q))
3390 continue;
3391
3392 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3393 continue;
3394
3395 num++;
3396
3397 if (c->sent < min) {
3398 min = c->sent;
3399 conn = c;
3400 }
3401
3402 if (hci_conn_num(hdev, type) == num)
3403 break;
3404 }
3405
3406 rcu_read_unlock();
3407
3408 hci_quote_sent(conn, num, quote);
3409
3410 BT_DBG("conn %p quote %d", conn, *quote);
3411 return conn;
3412}
3413
3414static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3415{
3416 struct hci_conn_hash *h = &hdev->conn_hash;
3417 struct hci_conn *c;
3418
3419 bt_dev_err(hdev, "link tx timeout");
3420
3421 rcu_read_lock();
3422
3423 /* Kill stalled connections */
3424 list_for_each_entry_rcu(c, &h->list, list) {
3425 if (c->type == type && c->sent) {
3426 bt_dev_err(hdev, "killing stalled connection %pMR",
3427 &c->dst);
3428 /* hci_disconnect might sleep, so, we have to release
3429 * the RCU read lock before calling it.
3430 */
3431 rcu_read_unlock();
3432 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3433 rcu_read_lock();
3434 }
3435 }
3436
3437 rcu_read_unlock();
3438}
3439
3440static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3441 int *quote)
3442{
3443 struct hci_conn_hash *h = &hdev->conn_hash;
3444 struct hci_chan *chan = NULL;
3445 unsigned int num = 0, min = ~0, cur_prio = 0;
3446 struct hci_conn *conn;
3447 int conn_num = 0;
3448
3449 BT_DBG("%s", hdev->name);
3450
3451 rcu_read_lock();
3452
3453 list_for_each_entry_rcu(conn, &h->list, list) {
3454 struct hci_chan *tmp;
3455
3456 if (conn->type != type)
3457 continue;
3458
3459 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3460 continue;
3461
3462 conn_num++;
3463
3464 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3465 struct sk_buff *skb;
3466
3467 if (skb_queue_empty(&tmp->data_q))
3468 continue;
3469
3470 skb = skb_peek(&tmp->data_q);
3471 if (skb->priority < cur_prio)
3472 continue;
3473
3474 if (skb->priority > cur_prio) {
3475 num = 0;
3476 min = ~0;
3477 cur_prio = skb->priority;
3478 }
3479
3480 num++;
3481
3482 if (conn->sent < min) {
3483 min = conn->sent;
3484 chan = tmp;
3485 }
3486 }
3487
3488 if (hci_conn_num(hdev, type) == conn_num)
3489 break;
3490 }
3491
3492 rcu_read_unlock();
3493
3494 if (!chan)
3495 return NULL;
3496
3497 hci_quote_sent(chan->conn, num, quote);
3498
3499 BT_DBG("chan %p quote %d", chan, *quote);
3500 return chan;
3501}
3502
3503static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3504{
3505 struct hci_conn_hash *h = &hdev->conn_hash;
3506 struct hci_conn *conn;
3507 int num = 0;
3508
3509 BT_DBG("%s", hdev->name);
3510
3511 rcu_read_lock();
3512
3513 list_for_each_entry_rcu(conn, &h->list, list) {
3514 struct hci_chan *chan;
3515
3516 if (conn->type != type)
3517 continue;
3518
3519 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3520 continue;
3521
3522 num++;
3523
3524 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3525 struct sk_buff *skb;
3526
3527 if (chan->sent) {
3528 chan->sent = 0;
3529 continue;
3530 }
3531
3532 if (skb_queue_empty(&chan->data_q))
3533 continue;
3534
3535 skb = skb_peek(&chan->data_q);
3536 if (skb->priority >= HCI_PRIO_MAX - 1)
3537 continue;
3538
3539 skb->priority = HCI_PRIO_MAX - 1;
3540
3541 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3542 skb->priority);
3543 }
3544
3545 if (hci_conn_num(hdev, type) == num)
3546 break;
3547 }
3548
3549 rcu_read_unlock();
3550
3551}
3552
3553static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3554{
3555 /* Calculate count of blocks used by this packet */
3556 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3557}
3558
3559static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
3560{
3561 unsigned long last_tx;
3562
3563 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3564 return;
3565
3566 switch (type) {
3567 case LE_LINK:
3568 last_tx = hdev->le_last_tx;
3569 break;
3570 default:
3571 last_tx = hdev->acl_last_tx;
3572 break;
3573 }
3574
3575 /* tx timeout must be longer than maximum link supervision timeout
3576 * (40.9 seconds)
3577 */
3578 if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
3579 hci_link_tx_to(hdev, type);
3580}
3581
3582/* Schedule SCO */
3583static void hci_sched_sco(struct hci_dev *hdev)
3584{
3585 struct hci_conn *conn;
3586 struct sk_buff *skb;
3587 int quote;
3588
3589 BT_DBG("%s", hdev->name);
3590
3591 if (!hci_conn_num(hdev, SCO_LINK))
3592 return;
3593
3594 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3595 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3596 BT_DBG("skb %p len %d", skb, skb->len);
3597 hci_send_frame(hdev, skb);
3598
3599 conn->sent++;
3600 if (conn->sent == ~0)
3601 conn->sent = 0;
3602 }
3603 }
3604}
3605
3606static void hci_sched_esco(struct hci_dev *hdev)
3607{
3608 struct hci_conn *conn;
3609 struct sk_buff *skb;
3610 int quote;
3611
3612 BT_DBG("%s", hdev->name);
3613
3614 if (!hci_conn_num(hdev, ESCO_LINK))
3615 return;
3616
3617 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3618 "e))) {
3619 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3620 BT_DBG("skb %p len %d", skb, skb->len);
3621 hci_send_frame(hdev, skb);
3622
3623 conn->sent++;
3624 if (conn->sent == ~0)
3625 conn->sent = 0;
3626 }
3627 }
3628}
3629
3630static void hci_sched_acl_pkt(struct hci_dev *hdev)
3631{
3632 unsigned int cnt = hdev->acl_cnt;
3633 struct hci_chan *chan;
3634 struct sk_buff *skb;
3635 int quote;
3636
3637 __check_timeout(hdev, cnt, ACL_LINK);
3638
3639 while (hdev->acl_cnt &&
3640 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3641 u32 priority = (skb_peek(&chan->data_q))->priority;
3642 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3643 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3644 skb->len, skb->priority);
3645
3646 /* Stop if priority has changed */
3647 if (skb->priority < priority)
3648 break;
3649
3650 skb = skb_dequeue(&chan->data_q);
3651
3652 hci_conn_enter_active_mode(chan->conn,
3653 bt_cb(skb)->force_active);
3654
3655 hci_send_frame(hdev, skb);
3656 hdev->acl_last_tx = jiffies;
3657
3658 hdev->acl_cnt--;
3659 chan->sent++;
3660 chan->conn->sent++;
3661
3662 /* Send pending SCO packets right away */
3663 hci_sched_sco(hdev);
3664 hci_sched_esco(hdev);
3665 }
3666 }
3667
3668 if (cnt != hdev->acl_cnt)
3669 hci_prio_recalculate(hdev, ACL_LINK);
3670}
3671
3672static void hci_sched_acl_blk(struct hci_dev *hdev)
3673{
3674 unsigned int cnt = hdev->block_cnt;
3675 struct hci_chan *chan;
3676 struct sk_buff *skb;
3677 int quote;
3678 u8 type;
3679
3680 BT_DBG("%s", hdev->name);
3681
3682 if (hdev->dev_type == HCI_AMP)
3683 type = AMP_LINK;
3684 else
3685 type = ACL_LINK;
3686
3687 __check_timeout(hdev, cnt, type);
3688
3689 while (hdev->block_cnt > 0 &&
3690 (chan = hci_chan_sent(hdev, type, "e))) {
3691 u32 priority = (skb_peek(&chan->data_q))->priority;
3692 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3693 int blocks;
3694
3695 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3696 skb->len, skb->priority);
3697
3698 /* Stop if priority has changed */
3699 if (skb->priority < priority)
3700 break;
3701
3702 skb = skb_dequeue(&chan->data_q);
3703
3704 blocks = __get_blocks(hdev, skb);
3705 if (blocks > hdev->block_cnt)
3706 return;
3707
3708 hci_conn_enter_active_mode(chan->conn,
3709 bt_cb(skb)->force_active);
3710
3711 hci_send_frame(hdev, skb);
3712 hdev->acl_last_tx = jiffies;
3713
3714 hdev->block_cnt -= blocks;
3715 quote -= blocks;
3716
3717 chan->sent += blocks;
3718 chan->conn->sent += blocks;
3719 }
3720 }
3721
3722 if (cnt != hdev->block_cnt)
3723 hci_prio_recalculate(hdev, type);
3724}
3725
3726static void hci_sched_acl(struct hci_dev *hdev)
3727{
3728 BT_DBG("%s", hdev->name);
3729
3730 /* No ACL link over BR/EDR controller */
3731 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
3732 return;
3733
3734 /* No AMP link over AMP controller */
3735 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3736 return;
3737
3738 switch (hdev->flow_ctl_mode) {
3739 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3740 hci_sched_acl_pkt(hdev);
3741 break;
3742
3743 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3744 hci_sched_acl_blk(hdev);
3745 break;
3746 }
3747}
3748
3749static void hci_sched_le(struct hci_dev *hdev)
3750{
3751 struct hci_chan *chan;
3752 struct sk_buff *skb;
3753 int quote, cnt, tmp;
3754
3755 BT_DBG("%s", hdev->name);
3756
3757 if (!hci_conn_num(hdev, LE_LINK))
3758 return;
3759
3760 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3761
3762 __check_timeout(hdev, cnt, LE_LINK);
3763
3764 tmp = cnt;
3765 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3766 u32 priority = (skb_peek(&chan->data_q))->priority;
3767 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3768 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3769 skb->len, skb->priority);
3770
3771 /* Stop if priority has changed */
3772 if (skb->priority < priority)
3773 break;
3774
3775 skb = skb_dequeue(&chan->data_q);
3776
3777 hci_send_frame(hdev, skb);
3778 hdev->le_last_tx = jiffies;
3779
3780 cnt--;
3781 chan->sent++;
3782 chan->conn->sent++;
3783
3784 /* Send pending SCO packets right away */
3785 hci_sched_sco(hdev);
3786 hci_sched_esco(hdev);
3787 }
3788 }
3789
3790 if (hdev->le_pkts)
3791 hdev->le_cnt = cnt;
3792 else
3793 hdev->acl_cnt = cnt;
3794
3795 if (cnt != tmp)
3796 hci_prio_recalculate(hdev, LE_LINK);
3797}
3798
3799/* Schedule CIS */
3800static void hci_sched_iso(struct hci_dev *hdev)
3801{
3802 struct hci_conn *conn;
3803 struct sk_buff *skb;
3804 int quote, *cnt;
3805
3806 BT_DBG("%s", hdev->name);
3807
3808 if (!hci_conn_num(hdev, ISO_LINK))
3809 return;
3810
3811 cnt = hdev->iso_pkts ? &hdev->iso_cnt :
3812 hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3813 while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) {
3814 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3815 BT_DBG("skb %p len %d", skb, skb->len);
3816 hci_send_frame(hdev, skb);
3817
3818 conn->sent++;
3819 if (conn->sent == ~0)
3820 conn->sent = 0;
3821 (*cnt)--;
3822 }
3823 }
3824}
3825
3826static void hci_tx_work(struct work_struct *work)
3827{
3828 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3829 struct sk_buff *skb;
3830
3831 BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
3832 hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
3833
3834 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3835 /* Schedule queues and send stuff to HCI driver */
3836 hci_sched_sco(hdev);
3837 hci_sched_esco(hdev);
3838 hci_sched_iso(hdev);
3839 hci_sched_acl(hdev);
3840 hci_sched_le(hdev);
3841 }
3842
3843 /* Send next queued raw (unknown type) packet */
3844 while ((skb = skb_dequeue(&hdev->raw_q)))
3845 hci_send_frame(hdev, skb);
3846}
3847
3848/* ----- HCI RX task (incoming data processing) ----- */
3849
3850/* ACL data packet */
3851static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3852{
3853 struct hci_acl_hdr *hdr = (void *) skb->data;
3854 struct hci_conn *conn;
3855 __u16 handle, flags;
3856
3857 skb_pull(skb, HCI_ACL_HDR_SIZE);
3858
3859 handle = __le16_to_cpu(hdr->handle);
3860 flags = hci_flags(handle);
3861 handle = hci_handle(handle);
3862
3863 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3864 handle, flags);
3865
3866 hdev->stat.acl_rx++;
3867
3868 hci_dev_lock(hdev);
3869 conn = hci_conn_hash_lookup_handle(hdev, handle);
3870 hci_dev_unlock(hdev);
3871
3872 if (conn) {
3873 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3874
3875 /* Send to upper protocol */
3876 l2cap_recv_acldata(conn, skb, flags);
3877 return;
3878 } else {
3879 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
3880 handle);
3881 }
3882
3883 kfree_skb(skb);
3884}
3885
3886/* SCO data packet */
3887static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3888{
3889 struct hci_sco_hdr *hdr = (void *) skb->data;
3890 struct hci_conn *conn;
3891 __u16 handle, flags;
3892
3893 skb_pull(skb, HCI_SCO_HDR_SIZE);
3894
3895 handle = __le16_to_cpu(hdr->handle);
3896 flags = hci_flags(handle);
3897 handle = hci_handle(handle);
3898
3899 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3900 handle, flags);
3901
3902 hdev->stat.sco_rx++;
3903
3904 hci_dev_lock(hdev);
3905 conn = hci_conn_hash_lookup_handle(hdev, handle);
3906 hci_dev_unlock(hdev);
3907
3908 if (conn) {
3909 /* Send to upper protocol */
3910 hci_skb_pkt_status(skb) = flags & 0x03;
3911 sco_recv_scodata(conn, skb);
3912 return;
3913 } else {
3914 bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
3915 handle);
3916 }
3917
3918 kfree_skb(skb);
3919}
3920
3921static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3922{
3923 struct hci_iso_hdr *hdr;
3924 struct hci_conn *conn;
3925 __u16 handle, flags;
3926
3927 hdr = skb_pull_data(skb, sizeof(*hdr));
3928 if (!hdr) {
3929 bt_dev_err(hdev, "ISO packet too small");
3930 goto drop;
3931 }
3932
3933 handle = __le16_to_cpu(hdr->handle);
3934 flags = hci_flags(handle);
3935 handle = hci_handle(handle);
3936
3937 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3938 handle, flags);
3939
3940 hci_dev_lock(hdev);
3941 conn = hci_conn_hash_lookup_handle(hdev, handle);
3942 hci_dev_unlock(hdev);
3943
3944 if (!conn) {
3945 bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
3946 handle);
3947 goto drop;
3948 }
3949
3950 /* Send to upper protocol */
3951 iso_recv(conn, skb, flags);
3952 return;
3953
3954drop:
3955 kfree_skb(skb);
3956}
3957
3958static bool hci_req_is_complete(struct hci_dev *hdev)
3959{
3960 struct sk_buff *skb;
3961
3962 skb = skb_peek(&hdev->cmd_q);
3963 if (!skb)
3964 return true;
3965
3966 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
3967}
3968
3969static void hci_resend_last(struct hci_dev *hdev)
3970{
3971 struct hci_command_hdr *sent;
3972 struct sk_buff *skb;
3973 u16 opcode;
3974
3975 if (!hdev->sent_cmd)
3976 return;
3977
3978 sent = (void *) hdev->sent_cmd->data;
3979 opcode = __le16_to_cpu(sent->opcode);
3980 if (opcode == HCI_OP_RESET)
3981 return;
3982
3983 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3984 if (!skb)
3985 return;
3986
3987 skb_queue_head(&hdev->cmd_q, skb);
3988 queue_work(hdev->workqueue, &hdev->cmd_work);
3989}
3990
3991void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
3992 hci_req_complete_t *req_complete,
3993 hci_req_complete_skb_t *req_complete_skb)
3994{
3995 struct sk_buff *skb;
3996 unsigned long flags;
3997
3998 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3999
4000 /* If the completed command doesn't match the last one that was
4001 * sent we need to do special handling of it.
4002 */
4003 if (!hci_sent_cmd_data(hdev, opcode)) {
4004 /* Some CSR based controllers generate a spontaneous
4005 * reset complete event during init and any pending
4006 * command will never be completed. In such a case we
4007 * need to resend whatever was the last sent
4008 * command.
4009 */
4010 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4011 hci_resend_last(hdev);
4012
4013 return;
4014 }
4015
4016 /* If we reach this point this event matches the last command sent */
4017 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4018
4019 /* If the command succeeded and there's still more commands in
4020 * this request the request is not yet complete.
4021 */
4022 if (!status && !hci_req_is_complete(hdev))
4023 return;
4024
4025 /* If this was the last command in a request the complete
4026 * callback would be found in hdev->sent_cmd instead of the
4027 * command queue (hdev->cmd_q).
4028 */
4029 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4030 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4031 return;
4032 }
4033
4034 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4035 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4036 return;
4037 }
4038
4039 /* Remove all pending commands belonging to this request */
4040 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4041 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4042 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4043 __skb_queue_head(&hdev->cmd_q, skb);
4044 break;
4045 }
4046
4047 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4048 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4049 else
4050 *req_complete = bt_cb(skb)->hci.req_complete;
4051 dev_kfree_skb_irq(skb);
4052 }
4053 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4054}
4055
4056static void hci_rx_work(struct work_struct *work)
4057{
4058 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4059 struct sk_buff *skb;
4060
4061 BT_DBG("%s", hdev->name);
4062
4063 /* The kcov_remote functions used for collecting packet parsing
4064 * coverage information from this background thread and associate
4065 * the coverage with the syscall's thread which originally injected
4066 * the packet. This helps fuzzing the kernel.
4067 */
4068 for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
4069 kcov_remote_start_common(skb_get_kcov_handle(skb));
4070
4071 /* Send copy to monitor */
4072 hci_send_to_monitor(hdev, skb);
4073
4074 if (atomic_read(&hdev->promisc)) {
4075 /* Send copy to the sockets */
4076 hci_send_to_sock(hdev, skb);
4077 }
4078
4079 /* If the device has been opened in HCI_USER_CHANNEL,
4080 * the userspace has exclusive access to device.
4081 * When device is HCI_INIT, we still need to process
4082 * the data packets to the driver in order
4083 * to complete its setup().
4084 */
4085 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4086 !test_bit(HCI_INIT, &hdev->flags)) {
4087 kfree_skb(skb);
4088 continue;
4089 }
4090
4091 if (test_bit(HCI_INIT, &hdev->flags)) {
4092 /* Don't process data packets in this states. */
4093 switch (hci_skb_pkt_type(skb)) {
4094 case HCI_ACLDATA_PKT:
4095 case HCI_SCODATA_PKT:
4096 case HCI_ISODATA_PKT:
4097 kfree_skb(skb);
4098 continue;
4099 }
4100 }
4101
4102 /* Process frame */
4103 switch (hci_skb_pkt_type(skb)) {
4104 case HCI_EVENT_PKT:
4105 BT_DBG("%s Event packet", hdev->name);
4106 hci_event_packet(hdev, skb);
4107 break;
4108
4109 case HCI_ACLDATA_PKT:
4110 BT_DBG("%s ACL data packet", hdev->name);
4111 hci_acldata_packet(hdev, skb);
4112 break;
4113
4114 case HCI_SCODATA_PKT:
4115 BT_DBG("%s SCO data packet", hdev->name);
4116 hci_scodata_packet(hdev, skb);
4117 break;
4118
4119 case HCI_ISODATA_PKT:
4120 BT_DBG("%s ISO data packet", hdev->name);
4121 hci_isodata_packet(hdev, skb);
4122 break;
4123
4124 default:
4125 kfree_skb(skb);
4126 break;
4127 }
4128 }
4129}
4130
4131static void hci_cmd_work(struct work_struct *work)
4132{
4133 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4134 struct sk_buff *skb;
4135
4136 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4137 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4138
4139 /* Send queued commands */
4140 if (atomic_read(&hdev->cmd_cnt)) {
4141 skb = skb_dequeue(&hdev->cmd_q);
4142 if (!skb)
4143 return;
4144
4145 kfree_skb(hdev->sent_cmd);
4146
4147 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4148 if (hdev->sent_cmd) {
4149 int res;
4150 if (hci_req_status_pend(hdev))
4151 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4152 atomic_dec(&hdev->cmd_cnt);
4153
4154 res = hci_send_frame(hdev, skb);
4155 if (res < 0)
4156 __hci_cmd_sync_cancel(hdev, -res);
4157
4158 rcu_read_lock();
4159 if (test_bit(HCI_RESET, &hdev->flags) ||
4160 hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
4161 cancel_delayed_work(&hdev->cmd_timer);
4162 else
4163 queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
4164 HCI_CMD_TIMEOUT);
4165 rcu_read_unlock();
4166 } else {
4167 skb_queue_head(&hdev->cmd_q, skb);
4168 queue_work(hdev->workqueue, &hdev->cmd_work);
4169 }
4170 }
4171}
1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
10
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
23*/
24
25/* Bluetooth HCI core. */
26
27#include <linux/jiffies.h>
28#include <linux/module.h>
29#include <linux/kmod.h>
30
31#include <linux/types.h>
32#include <linux/errno.h>
33#include <linux/kernel.h>
34#include <linux/sched.h>
35#include <linux/slab.h>
36#include <linux/poll.h>
37#include <linux/fcntl.h>
38#include <linux/init.h>
39#include <linux/skbuff.h>
40#include <linux/workqueue.h>
41#include <linux/interrupt.h>
42#include <linux/notifier.h>
43#include <linux/rfkill.h>
44#include <linux/timer.h>
45#include <linux/crypto.h>
46#include <net/sock.h>
47
48#include <asm/system.h>
49#include <linux/uaccess.h>
50#include <asm/unaligned.h>
51
52#include <net/bluetooth/bluetooth.h>
53#include <net/bluetooth/hci_core.h>
54
55#define AUTO_OFF_TIMEOUT 2000
56
57static void hci_cmd_task(unsigned long arg);
58static void hci_rx_task(unsigned long arg);
59static void hci_tx_task(unsigned long arg);
60
61static DEFINE_RWLOCK(hci_task_lock);
62
63/* HCI device list */
64LIST_HEAD(hci_dev_list);
65DEFINE_RWLOCK(hci_dev_list_lock);
66
67/* HCI callback list */
68LIST_HEAD(hci_cb_list);
69DEFINE_RWLOCK(hci_cb_list_lock);
70
71/* HCI protocols */
72#define HCI_MAX_PROTO 2
73struct hci_proto *hci_proto[HCI_MAX_PROTO];
74
75/* HCI notifiers list */
76static ATOMIC_NOTIFIER_HEAD(hci_notifier);
77
78/* ---- HCI notifications ---- */
79
80int hci_register_notifier(struct notifier_block *nb)
81{
82 return atomic_notifier_chain_register(&hci_notifier, nb);
83}
84
85int hci_unregister_notifier(struct notifier_block *nb)
86{
87 return atomic_notifier_chain_unregister(&hci_notifier, nb);
88}
89
90static void hci_notify(struct hci_dev *hdev, int event)
91{
92 atomic_notifier_call_chain(&hci_notifier, event, hdev);
93}
94
95/* ---- HCI requests ---- */
96
97void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
98{
99 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
100
101 /* If this is the init phase check if the completed command matches
102 * the last init command, and if not just return.
103 */
104 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
105 return;
106
107 if (hdev->req_status == HCI_REQ_PEND) {
108 hdev->req_result = result;
109 hdev->req_status = HCI_REQ_DONE;
110 wake_up_interruptible(&hdev->req_wait_q);
111 }
112}
113
114static void hci_req_cancel(struct hci_dev *hdev, int err)
115{
116 BT_DBG("%s err 0x%2.2x", hdev->name, err);
117
118 if (hdev->req_status == HCI_REQ_PEND) {
119 hdev->req_result = err;
120 hdev->req_status = HCI_REQ_CANCELED;
121 wake_up_interruptible(&hdev->req_wait_q);
122 }
123}
124
125/* Execute request and wait for completion. */
126static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
127 unsigned long opt, __u32 timeout)
128{
129 DECLARE_WAITQUEUE(wait, current);
130 int err = 0;
131
132 BT_DBG("%s start", hdev->name);
133
134 hdev->req_status = HCI_REQ_PEND;
135
136 add_wait_queue(&hdev->req_wait_q, &wait);
137 set_current_state(TASK_INTERRUPTIBLE);
138
139 req(hdev, opt);
140 schedule_timeout(timeout);
141
142 remove_wait_queue(&hdev->req_wait_q, &wait);
143
144 if (signal_pending(current))
145 return -EINTR;
146
147 switch (hdev->req_status) {
148 case HCI_REQ_DONE:
149 err = -bt_to_errno(hdev->req_result);
150 break;
151
152 case HCI_REQ_CANCELED:
153 err = -hdev->req_result;
154 break;
155
156 default:
157 err = -ETIMEDOUT;
158 break;
159 }
160
161 hdev->req_status = hdev->req_result = 0;
162
163 BT_DBG("%s end: err %d", hdev->name, err);
164
165 return err;
166}
167
168static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
169 unsigned long opt, __u32 timeout)
170{
171 int ret;
172
173 if (!test_bit(HCI_UP, &hdev->flags))
174 return -ENETDOWN;
175
176 /* Serialize all requests */
177 hci_req_lock(hdev);
178 ret = __hci_request(hdev, req, opt, timeout);
179 hci_req_unlock(hdev);
180
181 return ret;
182}
183
184static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
185{
186 BT_DBG("%s %ld", hdev->name, opt);
187
188 /* Reset device */
189 set_bit(HCI_RESET, &hdev->flags);
190 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
191}
192
193static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
194{
195 struct hci_cp_delete_stored_link_key cp;
196 struct sk_buff *skb;
197 __le16 param;
198 __u8 flt_type;
199
200 BT_DBG("%s %ld", hdev->name, opt);
201
202 /* Driver initialization */
203
204 /* Special commands */
205 while ((skb = skb_dequeue(&hdev->driver_init))) {
206 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
207 skb->dev = (void *) hdev;
208
209 skb_queue_tail(&hdev->cmd_q, skb);
210 tasklet_schedule(&hdev->cmd_task);
211 }
212 skb_queue_purge(&hdev->driver_init);
213
214 /* Mandatory initialization */
215
216 /* Reset */
217 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
218 set_bit(HCI_RESET, &hdev->flags);
219 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
220 }
221
222 /* Read Local Supported Features */
223 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
224
225 /* Read Local Version */
226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
227
228 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
229 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
230
231#if 0
232 /* Host buffer size */
233 {
234 struct hci_cp_host_buffer_size cp;
235 cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE);
236 cp.sco_mtu = HCI_MAX_SCO_SIZE;
237 cp.acl_max_pkt = cpu_to_le16(0xffff);
238 cp.sco_max_pkt = cpu_to_le16(0xffff);
239 hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp);
240 }
241#endif
242
243 /* Read BD Address */
244 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
245
246 /* Read Class of Device */
247 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
248
249 /* Read Local Name */
250 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
251
252 /* Read Voice Setting */
253 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
254
255 /* Optional initialization */
256
257 /* Clear Event Filters */
258 flt_type = HCI_FLT_CLEAR_ALL;
259 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
260
261 /* Connection accept timeout ~20 secs */
262 param = cpu_to_le16(0x7d00);
263 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
264
265 bacpy(&cp.bdaddr, BDADDR_ANY);
266 cp.delete_all = 1;
267 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
268}
269
270static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
271{
272 BT_DBG("%s", hdev->name);
273
274 /* Read LE buffer size */
275 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
276}
277
278static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
279{
280 __u8 scan = opt;
281
282 BT_DBG("%s %x", hdev->name, scan);
283
284 /* Inquiry and Page scans */
285 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
286}
287
288static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
289{
290 __u8 auth = opt;
291
292 BT_DBG("%s %x", hdev->name, auth);
293
294 /* Authentication */
295 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
296}
297
298static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
299{
300 __u8 encrypt = opt;
301
302 BT_DBG("%s %x", hdev->name, encrypt);
303
304 /* Encryption */
305 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
306}
307
308static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
309{
310 __le16 policy = cpu_to_le16(opt);
311
312 BT_DBG("%s %x", hdev->name, policy);
313
314 /* Default link policy */
315 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
316}
317
318/* Get HCI device by index.
319 * Device is held on return. */
320struct hci_dev *hci_dev_get(int index)
321{
322 struct hci_dev *hdev = NULL;
323 struct list_head *p;
324
325 BT_DBG("%d", index);
326
327 if (index < 0)
328 return NULL;
329
330 read_lock(&hci_dev_list_lock);
331 list_for_each(p, &hci_dev_list) {
332 struct hci_dev *d = list_entry(p, struct hci_dev, list);
333 if (d->id == index) {
334 hdev = hci_dev_hold(d);
335 break;
336 }
337 }
338 read_unlock(&hci_dev_list_lock);
339 return hdev;
340}
341
342/* ---- Inquiry support ---- */
343static void inquiry_cache_flush(struct hci_dev *hdev)
344{
345 struct inquiry_cache *cache = &hdev->inq_cache;
346 struct inquiry_entry *next = cache->list, *e;
347
348 BT_DBG("cache %p", cache);
349
350 cache->list = NULL;
351 while ((e = next)) {
352 next = e->next;
353 kfree(e);
354 }
355}
356
357struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
358{
359 struct inquiry_cache *cache = &hdev->inq_cache;
360 struct inquiry_entry *e;
361
362 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
363
364 for (e = cache->list; e; e = e->next)
365 if (!bacmp(&e->data.bdaddr, bdaddr))
366 break;
367 return e;
368}
369
370void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data)
371{
372 struct inquiry_cache *cache = &hdev->inq_cache;
373 struct inquiry_entry *ie;
374
375 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
376
377 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
378 if (!ie) {
379 /* Entry not in the cache. Add new one. */
380 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
381 if (!ie)
382 return;
383
384 ie->next = cache->list;
385 cache->list = ie;
386 }
387
388 memcpy(&ie->data, data, sizeof(*data));
389 ie->timestamp = jiffies;
390 cache->timestamp = jiffies;
391}
392
393static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
394{
395 struct inquiry_cache *cache = &hdev->inq_cache;
396 struct inquiry_info *info = (struct inquiry_info *) buf;
397 struct inquiry_entry *e;
398 int copied = 0;
399
400 for (e = cache->list; e && copied < num; e = e->next, copied++) {
401 struct inquiry_data *data = &e->data;
402 bacpy(&info->bdaddr, &data->bdaddr);
403 info->pscan_rep_mode = data->pscan_rep_mode;
404 info->pscan_period_mode = data->pscan_period_mode;
405 info->pscan_mode = data->pscan_mode;
406 memcpy(info->dev_class, data->dev_class, 3);
407 info->clock_offset = data->clock_offset;
408 info++;
409 }
410
411 BT_DBG("cache %p, copied %d", cache, copied);
412 return copied;
413}
414
415static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
416{
417 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
418 struct hci_cp_inquiry cp;
419
420 BT_DBG("%s", hdev->name);
421
422 if (test_bit(HCI_INQUIRY, &hdev->flags))
423 return;
424
425 /* Start Inquiry */
426 memcpy(&cp.lap, &ir->lap, 3);
427 cp.length = ir->length;
428 cp.num_rsp = ir->num_rsp;
429 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
430}
431
432int hci_inquiry(void __user *arg)
433{
434 __u8 __user *ptr = arg;
435 struct hci_inquiry_req ir;
436 struct hci_dev *hdev;
437 int err = 0, do_inquiry = 0, max_rsp;
438 long timeo;
439 __u8 *buf;
440
441 if (copy_from_user(&ir, ptr, sizeof(ir)))
442 return -EFAULT;
443
444 hdev = hci_dev_get(ir.dev_id);
445 if (!hdev)
446 return -ENODEV;
447
448 hci_dev_lock_bh(hdev);
449 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
450 inquiry_cache_empty(hdev) ||
451 ir.flags & IREQ_CACHE_FLUSH) {
452 inquiry_cache_flush(hdev);
453 do_inquiry = 1;
454 }
455 hci_dev_unlock_bh(hdev);
456
457 timeo = ir.length * msecs_to_jiffies(2000);
458
459 if (do_inquiry) {
460 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
461 if (err < 0)
462 goto done;
463 }
464
465 /* for unlimited number of responses we will use buffer with 255 entries */
466 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
467
468 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
469 * copy it to the user space.
470 */
471 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
472 if (!buf) {
473 err = -ENOMEM;
474 goto done;
475 }
476
477 hci_dev_lock_bh(hdev);
478 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
479 hci_dev_unlock_bh(hdev);
480
481 BT_DBG("num_rsp %d", ir.num_rsp);
482
483 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
484 ptr += sizeof(ir);
485 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
486 ir.num_rsp))
487 err = -EFAULT;
488 } else
489 err = -EFAULT;
490
491 kfree(buf);
492
493done:
494 hci_dev_put(hdev);
495 return err;
496}
497
498/* ---- HCI ioctl helpers ---- */
499
500int hci_dev_open(__u16 dev)
501{
502 struct hci_dev *hdev;
503 int ret = 0;
504
505 hdev = hci_dev_get(dev);
506 if (!hdev)
507 return -ENODEV;
508
509 BT_DBG("%s %p", hdev->name, hdev);
510
511 hci_req_lock(hdev);
512
513 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
514 ret = -ERFKILL;
515 goto done;
516 }
517
518 if (test_bit(HCI_UP, &hdev->flags)) {
519 ret = -EALREADY;
520 goto done;
521 }
522
523 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
524 set_bit(HCI_RAW, &hdev->flags);
525
526 /* Treat all non BR/EDR controllers as raw devices for now */
527 if (hdev->dev_type != HCI_BREDR)
528 set_bit(HCI_RAW, &hdev->flags);
529
530 if (hdev->open(hdev)) {
531 ret = -EIO;
532 goto done;
533 }
534
535 if (!test_bit(HCI_RAW, &hdev->flags)) {
536 atomic_set(&hdev->cmd_cnt, 1);
537 set_bit(HCI_INIT, &hdev->flags);
538 hdev->init_last_cmd = 0;
539
540 ret = __hci_request(hdev, hci_init_req, 0,
541 msecs_to_jiffies(HCI_INIT_TIMEOUT));
542
543 if (lmp_host_le_capable(hdev))
544 ret = __hci_request(hdev, hci_le_init_req, 0,
545 msecs_to_jiffies(HCI_INIT_TIMEOUT));
546
547 clear_bit(HCI_INIT, &hdev->flags);
548 }
549
550 if (!ret) {
551 hci_dev_hold(hdev);
552 set_bit(HCI_UP, &hdev->flags);
553 hci_notify(hdev, HCI_DEV_UP);
554 if (!test_bit(HCI_SETUP, &hdev->flags))
555 mgmt_powered(hdev->id, 1);
556 } else {
557 /* Init failed, cleanup */
558 tasklet_kill(&hdev->rx_task);
559 tasklet_kill(&hdev->tx_task);
560 tasklet_kill(&hdev->cmd_task);
561
562 skb_queue_purge(&hdev->cmd_q);
563 skb_queue_purge(&hdev->rx_q);
564
565 if (hdev->flush)
566 hdev->flush(hdev);
567
568 if (hdev->sent_cmd) {
569 kfree_skb(hdev->sent_cmd);
570 hdev->sent_cmd = NULL;
571 }
572
573 hdev->close(hdev);
574 hdev->flags = 0;
575 }
576
577done:
578 hci_req_unlock(hdev);
579 hci_dev_put(hdev);
580 return ret;
581}
582
583static int hci_dev_do_close(struct hci_dev *hdev)
584{
585 BT_DBG("%s %p", hdev->name, hdev);
586
587 hci_req_cancel(hdev, ENODEV);
588 hci_req_lock(hdev);
589
590 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
591 del_timer_sync(&hdev->cmd_timer);
592 hci_req_unlock(hdev);
593 return 0;
594 }
595
596 /* Kill RX and TX tasks */
597 tasklet_kill(&hdev->rx_task);
598 tasklet_kill(&hdev->tx_task);
599
600 hci_dev_lock_bh(hdev);
601 inquiry_cache_flush(hdev);
602 hci_conn_hash_flush(hdev);
603 hci_dev_unlock_bh(hdev);
604
605 hci_notify(hdev, HCI_DEV_DOWN);
606
607 if (hdev->flush)
608 hdev->flush(hdev);
609
610 /* Reset device */
611 skb_queue_purge(&hdev->cmd_q);
612 atomic_set(&hdev->cmd_cnt, 1);
613 if (!test_bit(HCI_RAW, &hdev->flags)) {
614 set_bit(HCI_INIT, &hdev->flags);
615 __hci_request(hdev, hci_reset_req, 0,
616 msecs_to_jiffies(250));
617 clear_bit(HCI_INIT, &hdev->flags);
618 }
619
620 /* Kill cmd task */
621 tasklet_kill(&hdev->cmd_task);
622
623 /* Drop queues */
624 skb_queue_purge(&hdev->rx_q);
625 skb_queue_purge(&hdev->cmd_q);
626 skb_queue_purge(&hdev->raw_q);
627
628 /* Drop last sent command */
629 if (hdev->sent_cmd) {
630 del_timer_sync(&hdev->cmd_timer);
631 kfree_skb(hdev->sent_cmd);
632 hdev->sent_cmd = NULL;
633 }
634
635 /* After this point our queues are empty
636 * and no tasks are scheduled. */
637 hdev->close(hdev);
638
639 mgmt_powered(hdev->id, 0);
640
641 /* Clear flags */
642 hdev->flags = 0;
643
644 hci_req_unlock(hdev);
645
646 hci_dev_put(hdev);
647 return 0;
648}
649
650int hci_dev_close(__u16 dev)
651{
652 struct hci_dev *hdev;
653 int err;
654
655 hdev = hci_dev_get(dev);
656 if (!hdev)
657 return -ENODEV;
658 err = hci_dev_do_close(hdev);
659 hci_dev_put(hdev);
660 return err;
661}
662
663int hci_dev_reset(__u16 dev)
664{
665 struct hci_dev *hdev;
666 int ret = 0;
667
668 hdev = hci_dev_get(dev);
669 if (!hdev)
670 return -ENODEV;
671
672 hci_req_lock(hdev);
673 tasklet_disable(&hdev->tx_task);
674
675 if (!test_bit(HCI_UP, &hdev->flags))
676 goto done;
677
678 /* Drop queues */
679 skb_queue_purge(&hdev->rx_q);
680 skb_queue_purge(&hdev->cmd_q);
681
682 hci_dev_lock_bh(hdev);
683 inquiry_cache_flush(hdev);
684 hci_conn_hash_flush(hdev);
685 hci_dev_unlock_bh(hdev);
686
687 if (hdev->flush)
688 hdev->flush(hdev);
689
690 atomic_set(&hdev->cmd_cnt, 1);
691 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
692
693 if (!test_bit(HCI_RAW, &hdev->flags))
694 ret = __hci_request(hdev, hci_reset_req, 0,
695 msecs_to_jiffies(HCI_INIT_TIMEOUT));
696
697done:
698 tasklet_enable(&hdev->tx_task);
699 hci_req_unlock(hdev);
700 hci_dev_put(hdev);
701 return ret;
702}
703
704int hci_dev_reset_stat(__u16 dev)
705{
706 struct hci_dev *hdev;
707 int ret = 0;
708
709 hdev = hci_dev_get(dev);
710 if (!hdev)
711 return -ENODEV;
712
713 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
714
715 hci_dev_put(hdev);
716
717 return ret;
718}
719
720int hci_dev_cmd(unsigned int cmd, void __user *arg)
721{
722 struct hci_dev *hdev;
723 struct hci_dev_req dr;
724 int err = 0;
725
726 if (copy_from_user(&dr, arg, sizeof(dr)))
727 return -EFAULT;
728
729 hdev = hci_dev_get(dr.dev_id);
730 if (!hdev)
731 return -ENODEV;
732
733 switch (cmd) {
734 case HCISETAUTH:
735 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
736 msecs_to_jiffies(HCI_INIT_TIMEOUT));
737 break;
738
739 case HCISETENCRYPT:
740 if (!lmp_encrypt_capable(hdev)) {
741 err = -EOPNOTSUPP;
742 break;
743 }
744
745 if (!test_bit(HCI_AUTH, &hdev->flags)) {
746 /* Auth must be enabled first */
747 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
748 msecs_to_jiffies(HCI_INIT_TIMEOUT));
749 if (err)
750 break;
751 }
752
753 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
754 msecs_to_jiffies(HCI_INIT_TIMEOUT));
755 break;
756
757 case HCISETSCAN:
758 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
759 msecs_to_jiffies(HCI_INIT_TIMEOUT));
760 break;
761
762 case HCISETLINKPOL:
763 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
764 msecs_to_jiffies(HCI_INIT_TIMEOUT));
765 break;
766
767 case HCISETLINKMODE:
768 hdev->link_mode = ((__u16) dr.dev_opt) &
769 (HCI_LM_MASTER | HCI_LM_ACCEPT);
770 break;
771
772 case HCISETPTYPE:
773 hdev->pkt_type = (__u16) dr.dev_opt;
774 break;
775
776 case HCISETACLMTU:
777 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
778 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
779 break;
780
781 case HCISETSCOMTU:
782 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
783 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
784 break;
785
786 default:
787 err = -EINVAL;
788 break;
789 }
790
791 hci_dev_put(hdev);
792 return err;
793}
794
795int hci_get_dev_list(void __user *arg)
796{
797 struct hci_dev_list_req *dl;
798 struct hci_dev_req *dr;
799 struct list_head *p;
800 int n = 0, size, err;
801 __u16 dev_num;
802
803 if (get_user(dev_num, (__u16 __user *) arg))
804 return -EFAULT;
805
806 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
807 return -EINVAL;
808
809 size = sizeof(*dl) + dev_num * sizeof(*dr);
810
811 dl = kzalloc(size, GFP_KERNEL);
812 if (!dl)
813 return -ENOMEM;
814
815 dr = dl->dev_req;
816
817 read_lock_bh(&hci_dev_list_lock);
818 list_for_each(p, &hci_dev_list) {
819 struct hci_dev *hdev;
820
821 hdev = list_entry(p, struct hci_dev, list);
822
823 hci_del_off_timer(hdev);
824
825 if (!test_bit(HCI_MGMT, &hdev->flags))
826 set_bit(HCI_PAIRABLE, &hdev->flags);
827
828 (dr + n)->dev_id = hdev->id;
829 (dr + n)->dev_opt = hdev->flags;
830
831 if (++n >= dev_num)
832 break;
833 }
834 read_unlock_bh(&hci_dev_list_lock);
835
836 dl->dev_num = n;
837 size = sizeof(*dl) + n * sizeof(*dr);
838
839 err = copy_to_user(arg, dl, size);
840 kfree(dl);
841
842 return err ? -EFAULT : 0;
843}
844
845int hci_get_dev_info(void __user *arg)
846{
847 struct hci_dev *hdev;
848 struct hci_dev_info di;
849 int err = 0;
850
851 if (copy_from_user(&di, arg, sizeof(di)))
852 return -EFAULT;
853
854 hdev = hci_dev_get(di.dev_id);
855 if (!hdev)
856 return -ENODEV;
857
858 hci_del_off_timer(hdev);
859
860 if (!test_bit(HCI_MGMT, &hdev->flags))
861 set_bit(HCI_PAIRABLE, &hdev->flags);
862
863 strcpy(di.name, hdev->name);
864 di.bdaddr = hdev->bdaddr;
865 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
866 di.flags = hdev->flags;
867 di.pkt_type = hdev->pkt_type;
868 di.acl_mtu = hdev->acl_mtu;
869 di.acl_pkts = hdev->acl_pkts;
870 di.sco_mtu = hdev->sco_mtu;
871 di.sco_pkts = hdev->sco_pkts;
872 di.link_policy = hdev->link_policy;
873 di.link_mode = hdev->link_mode;
874
875 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
876 memcpy(&di.features, &hdev->features, sizeof(di.features));
877
878 if (copy_to_user(arg, &di, sizeof(di)))
879 err = -EFAULT;
880
881 hci_dev_put(hdev);
882
883 return err;
884}
885
886/* ---- Interface to HCI drivers ---- */
887
888static int hci_rfkill_set_block(void *data, bool blocked)
889{
890 struct hci_dev *hdev = data;
891
892 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
893
894 if (!blocked)
895 return 0;
896
897 hci_dev_do_close(hdev);
898
899 return 0;
900}
901
902static const struct rfkill_ops hci_rfkill_ops = {
903 .set_block = hci_rfkill_set_block,
904};
905
906/* Alloc HCI device */
907struct hci_dev *hci_alloc_dev(void)
908{
909 struct hci_dev *hdev;
910
911 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
912 if (!hdev)
913 return NULL;
914
915 skb_queue_head_init(&hdev->driver_init);
916
917 return hdev;
918}
919EXPORT_SYMBOL(hci_alloc_dev);
920
921/* Free HCI device */
922void hci_free_dev(struct hci_dev *hdev)
923{
924 skb_queue_purge(&hdev->driver_init);
925
926 /* will free via device release */
927 put_device(&hdev->dev);
928}
929EXPORT_SYMBOL(hci_free_dev);
930
931static void hci_power_on(struct work_struct *work)
932{
933 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
934
935 BT_DBG("%s", hdev->name);
936
937 if (hci_dev_open(hdev->id) < 0)
938 return;
939
940 if (test_bit(HCI_AUTO_OFF, &hdev->flags))
941 mod_timer(&hdev->off_timer,
942 jiffies + msecs_to_jiffies(AUTO_OFF_TIMEOUT));
943
944 if (test_and_clear_bit(HCI_SETUP, &hdev->flags))
945 mgmt_index_added(hdev->id);
946}
947
948static void hci_power_off(struct work_struct *work)
949{
950 struct hci_dev *hdev = container_of(work, struct hci_dev, power_off);
951
952 BT_DBG("%s", hdev->name);
953
954 hci_dev_close(hdev->id);
955}
956
957static void hci_auto_off(unsigned long data)
958{
959 struct hci_dev *hdev = (struct hci_dev *) data;
960
961 BT_DBG("%s", hdev->name);
962
963 clear_bit(HCI_AUTO_OFF, &hdev->flags);
964
965 queue_work(hdev->workqueue, &hdev->power_off);
966}
967
968void hci_del_off_timer(struct hci_dev *hdev)
969{
970 BT_DBG("%s", hdev->name);
971
972 clear_bit(HCI_AUTO_OFF, &hdev->flags);
973 del_timer(&hdev->off_timer);
974}
975
976int hci_uuids_clear(struct hci_dev *hdev)
977{
978 struct list_head *p, *n;
979
980 list_for_each_safe(p, n, &hdev->uuids) {
981 struct bt_uuid *uuid;
982
983 uuid = list_entry(p, struct bt_uuid, list);
984
985 list_del(p);
986 kfree(uuid);
987 }
988
989 return 0;
990}
991
992int hci_link_keys_clear(struct hci_dev *hdev)
993{
994 struct list_head *p, *n;
995
996 list_for_each_safe(p, n, &hdev->link_keys) {
997 struct link_key *key;
998
999 key = list_entry(p, struct link_key, list);
1000
1001 list_del(p);
1002 kfree(key);
1003 }
1004
1005 return 0;
1006}
1007
1008struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1009{
1010 struct list_head *p;
1011
1012 list_for_each(p, &hdev->link_keys) {
1013 struct link_key *k;
1014
1015 k = list_entry(p, struct link_key, list);
1016
1017 if (bacmp(bdaddr, &k->bdaddr) == 0)
1018 return k;
1019 }
1020
1021 return NULL;
1022}
1023
1024static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1025 u8 key_type, u8 old_key_type)
1026{
1027 /* Legacy key */
1028 if (key_type < 0x03)
1029 return 1;
1030
1031 /* Debug keys are insecure so don't store them persistently */
1032 if (key_type == HCI_LK_DEBUG_COMBINATION)
1033 return 0;
1034
1035 /* Changed combination key and there's no previous one */
1036 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1037 return 0;
1038
1039 /* Security mode 3 case */
1040 if (!conn)
1041 return 1;
1042
1043 /* Neither local nor remote side had no-bonding as requirement */
1044 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1045 return 1;
1046
1047 /* Local side had dedicated bonding as requirement */
1048 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1049 return 1;
1050
1051 /* Remote side had dedicated bonding as requirement */
1052 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1053 return 1;
1054
1055 /* If none of the above criteria match, then don't store the key
1056 * persistently */
1057 return 0;
1058}
1059
1060struct link_key *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1061{
1062 struct link_key *k;
1063
1064 list_for_each_entry(k, &hdev->link_keys, list) {
1065 struct key_master_id *id;
1066
1067 if (k->type != HCI_LK_SMP_LTK)
1068 continue;
1069
1070 if (k->dlen != sizeof(*id))
1071 continue;
1072
1073 id = (void *) &k->data;
1074 if (id->ediv == ediv &&
1075 (memcmp(rand, id->rand, sizeof(id->rand)) == 0))
1076 return k;
1077 }
1078
1079 return NULL;
1080}
1081EXPORT_SYMBOL(hci_find_ltk);
1082
1083struct link_key *hci_find_link_key_type(struct hci_dev *hdev,
1084 bdaddr_t *bdaddr, u8 type)
1085{
1086 struct link_key *k;
1087
1088 list_for_each_entry(k, &hdev->link_keys, list)
1089 if (k->type == type && bacmp(bdaddr, &k->bdaddr) == 0)
1090 return k;
1091
1092 return NULL;
1093}
1094EXPORT_SYMBOL(hci_find_link_key_type);
1095
1096int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1097 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1098{
1099 struct link_key *key, *old_key;
1100 u8 old_key_type, persistent;
1101
1102 old_key = hci_find_link_key(hdev, bdaddr);
1103 if (old_key) {
1104 old_key_type = old_key->type;
1105 key = old_key;
1106 } else {
1107 old_key_type = conn ? conn->key_type : 0xff;
1108 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1109 if (!key)
1110 return -ENOMEM;
1111 list_add(&key->list, &hdev->link_keys);
1112 }
1113
1114 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1115
1116 /* Some buggy controller combinations generate a changed
1117 * combination key for legacy pairing even when there's no
1118 * previous key */
1119 if (type == HCI_LK_CHANGED_COMBINATION &&
1120 (!conn || conn->remote_auth == 0xff) &&
1121 old_key_type == 0xff) {
1122 type = HCI_LK_COMBINATION;
1123 if (conn)
1124 conn->key_type = type;
1125 }
1126
1127 bacpy(&key->bdaddr, bdaddr);
1128 memcpy(key->val, val, 16);
1129 key->pin_len = pin_len;
1130
1131 if (type == HCI_LK_CHANGED_COMBINATION)
1132 key->type = old_key_type;
1133 else
1134 key->type = type;
1135
1136 if (!new_key)
1137 return 0;
1138
1139 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1140
1141 mgmt_new_key(hdev->id, key, persistent);
1142
1143 if (!persistent) {
1144 list_del(&key->list);
1145 kfree(key);
1146 }
1147
1148 return 0;
1149}
1150
1151int hci_add_ltk(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
1152 u8 key_size, __le16 ediv, u8 rand[8], u8 ltk[16])
1153{
1154 struct link_key *key, *old_key;
1155 struct key_master_id *id;
1156 u8 old_key_type;
1157
1158 BT_DBG("%s addr %s", hdev->name, batostr(bdaddr));
1159
1160 old_key = hci_find_link_key_type(hdev, bdaddr, HCI_LK_SMP_LTK);
1161 if (old_key) {
1162 key = old_key;
1163 old_key_type = old_key->type;
1164 } else {
1165 key = kzalloc(sizeof(*key) + sizeof(*id), GFP_ATOMIC);
1166 if (!key)
1167 return -ENOMEM;
1168 list_add(&key->list, &hdev->link_keys);
1169 old_key_type = 0xff;
1170 }
1171
1172 key->dlen = sizeof(*id);
1173
1174 bacpy(&key->bdaddr, bdaddr);
1175 memcpy(key->val, ltk, sizeof(key->val));
1176 key->type = HCI_LK_SMP_LTK;
1177 key->pin_len = key_size;
1178
1179 id = (void *) &key->data;
1180 id->ediv = ediv;
1181 memcpy(id->rand, rand, sizeof(id->rand));
1182
1183 if (new_key)
1184 mgmt_new_key(hdev->id, key, old_key_type);
1185
1186 return 0;
1187}
1188
1189int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1190{
1191 struct link_key *key;
1192
1193 key = hci_find_link_key(hdev, bdaddr);
1194 if (!key)
1195 return -ENOENT;
1196
1197 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1198
1199 list_del(&key->list);
1200 kfree(key);
1201
1202 return 0;
1203}
1204
1205/* HCI command timer function */
1206static void hci_cmd_timer(unsigned long arg)
1207{
1208 struct hci_dev *hdev = (void *) arg;
1209
1210 BT_ERR("%s command tx timeout", hdev->name);
1211 atomic_set(&hdev->cmd_cnt, 1);
1212 tasklet_schedule(&hdev->cmd_task);
1213}
1214
1215struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1216 bdaddr_t *bdaddr)
1217{
1218 struct oob_data *data;
1219
1220 list_for_each_entry(data, &hdev->remote_oob_data, list)
1221 if (bacmp(bdaddr, &data->bdaddr) == 0)
1222 return data;
1223
1224 return NULL;
1225}
1226
1227int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1228{
1229 struct oob_data *data;
1230
1231 data = hci_find_remote_oob_data(hdev, bdaddr);
1232 if (!data)
1233 return -ENOENT;
1234
1235 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1236
1237 list_del(&data->list);
1238 kfree(data);
1239
1240 return 0;
1241}
1242
1243int hci_remote_oob_data_clear(struct hci_dev *hdev)
1244{
1245 struct oob_data *data, *n;
1246
1247 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1248 list_del(&data->list);
1249 kfree(data);
1250 }
1251
1252 return 0;
1253}
1254
1255int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1256 u8 *randomizer)
1257{
1258 struct oob_data *data;
1259
1260 data = hci_find_remote_oob_data(hdev, bdaddr);
1261
1262 if (!data) {
1263 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1264 if (!data)
1265 return -ENOMEM;
1266
1267 bacpy(&data->bdaddr, bdaddr);
1268 list_add(&data->list, &hdev->remote_oob_data);
1269 }
1270
1271 memcpy(data->hash, hash, sizeof(data->hash));
1272 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1273
1274 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1275
1276 return 0;
1277}
1278
1279struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
1280 bdaddr_t *bdaddr)
1281{
1282 struct list_head *p;
1283
1284 list_for_each(p, &hdev->blacklist) {
1285 struct bdaddr_list *b;
1286
1287 b = list_entry(p, struct bdaddr_list, list);
1288
1289 if (bacmp(bdaddr, &b->bdaddr) == 0)
1290 return b;
1291 }
1292
1293 return NULL;
1294}
1295
1296int hci_blacklist_clear(struct hci_dev *hdev)
1297{
1298 struct list_head *p, *n;
1299
1300 list_for_each_safe(p, n, &hdev->blacklist) {
1301 struct bdaddr_list *b;
1302
1303 b = list_entry(p, struct bdaddr_list, list);
1304
1305 list_del(p);
1306 kfree(b);
1307 }
1308
1309 return 0;
1310}
1311
1312int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr)
1313{
1314 struct bdaddr_list *entry;
1315 int err;
1316
1317 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1318 return -EBADF;
1319
1320 hci_dev_lock_bh(hdev);
1321
1322 if (hci_blacklist_lookup(hdev, bdaddr)) {
1323 err = -EEXIST;
1324 goto err;
1325 }
1326
1327 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1328 if (!entry) {
1329 err = -ENOMEM;
1330 goto err;
1331 }
1332
1333 bacpy(&entry->bdaddr, bdaddr);
1334
1335 list_add(&entry->list, &hdev->blacklist);
1336
1337 err = 0;
1338
1339err:
1340 hci_dev_unlock_bh(hdev);
1341 return err;
1342}
1343
1344int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr)
1345{
1346 struct bdaddr_list *entry;
1347 int err = 0;
1348
1349 hci_dev_lock_bh(hdev);
1350
1351 if (bacmp(bdaddr, BDADDR_ANY) == 0) {
1352 hci_blacklist_clear(hdev);
1353 goto done;
1354 }
1355
1356 entry = hci_blacklist_lookup(hdev, bdaddr);
1357 if (!entry) {
1358 err = -ENOENT;
1359 goto done;
1360 }
1361
1362 list_del(&entry->list);
1363 kfree(entry);
1364
1365done:
1366 hci_dev_unlock_bh(hdev);
1367 return err;
1368}
1369
1370static void hci_clear_adv_cache(unsigned long arg)
1371{
1372 struct hci_dev *hdev = (void *) arg;
1373
1374 hci_dev_lock(hdev);
1375
1376 hci_adv_entries_clear(hdev);
1377
1378 hci_dev_unlock(hdev);
1379}
1380
1381int hci_adv_entries_clear(struct hci_dev *hdev)
1382{
1383 struct adv_entry *entry, *tmp;
1384
1385 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1386 list_del(&entry->list);
1387 kfree(entry);
1388 }
1389
1390 BT_DBG("%s adv cache cleared", hdev->name);
1391
1392 return 0;
1393}
1394
1395struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1396{
1397 struct adv_entry *entry;
1398
1399 list_for_each_entry(entry, &hdev->adv_entries, list)
1400 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1401 return entry;
1402
1403 return NULL;
1404}
1405
1406static inline int is_connectable_adv(u8 evt_type)
1407{
1408 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1409 return 1;
1410
1411 return 0;
1412}
1413
1414int hci_add_adv_entry(struct hci_dev *hdev,
1415 struct hci_ev_le_advertising_info *ev)
1416{
1417 struct adv_entry *entry;
1418
1419 if (!is_connectable_adv(ev->evt_type))
1420 return -EINVAL;
1421
1422 /* Only new entries should be added to adv_entries. So, if
1423 * bdaddr was found, don't add it. */
1424 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1425 return 0;
1426
1427 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
1428 if (!entry)
1429 return -ENOMEM;
1430
1431 bacpy(&entry->bdaddr, &ev->bdaddr);
1432 entry->bdaddr_type = ev->bdaddr_type;
1433
1434 list_add(&entry->list, &hdev->adv_entries);
1435
1436 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1437 batostr(&entry->bdaddr), entry->bdaddr_type);
1438
1439 return 0;
1440}
1441
1442/* Register HCI device */
1443int hci_register_dev(struct hci_dev *hdev)
1444{
1445 struct list_head *head = &hci_dev_list, *p;
1446 int i, id = 0;
1447
1448 BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
1449 hdev->bus, hdev->owner);
1450
1451 if (!hdev->open || !hdev->close || !hdev->destruct)
1452 return -EINVAL;
1453
1454 write_lock_bh(&hci_dev_list_lock);
1455
1456 /* Find first available device id */
1457 list_for_each(p, &hci_dev_list) {
1458 if (list_entry(p, struct hci_dev, list)->id != id)
1459 break;
1460 head = p; id++;
1461 }
1462
1463 sprintf(hdev->name, "hci%d", id);
1464 hdev->id = id;
1465 list_add(&hdev->list, head);
1466
1467 atomic_set(&hdev->refcnt, 1);
1468 spin_lock_init(&hdev->lock);
1469
1470 hdev->flags = 0;
1471 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1472 hdev->esco_type = (ESCO_HV1);
1473 hdev->link_mode = (HCI_LM_ACCEPT);
1474 hdev->io_capability = 0x03; /* No Input No Output */
1475
1476 hdev->idle_timeout = 0;
1477 hdev->sniff_max_interval = 800;
1478 hdev->sniff_min_interval = 80;
1479
1480 tasklet_init(&hdev->cmd_task, hci_cmd_task, (unsigned long) hdev);
1481 tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev);
1482 tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev);
1483
1484 skb_queue_head_init(&hdev->rx_q);
1485 skb_queue_head_init(&hdev->cmd_q);
1486 skb_queue_head_init(&hdev->raw_q);
1487
1488 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1489
1490 for (i = 0; i < NUM_REASSEMBLY; i++)
1491 hdev->reassembly[i] = NULL;
1492
1493 init_waitqueue_head(&hdev->req_wait_q);
1494 mutex_init(&hdev->req_lock);
1495
1496 inquiry_cache_init(hdev);
1497
1498 hci_conn_hash_init(hdev);
1499
1500 INIT_LIST_HEAD(&hdev->blacklist);
1501
1502 INIT_LIST_HEAD(&hdev->uuids);
1503
1504 INIT_LIST_HEAD(&hdev->link_keys);
1505
1506 INIT_LIST_HEAD(&hdev->remote_oob_data);
1507
1508 INIT_LIST_HEAD(&hdev->adv_entries);
1509 setup_timer(&hdev->adv_timer, hci_clear_adv_cache,
1510 (unsigned long) hdev);
1511
1512 INIT_WORK(&hdev->power_on, hci_power_on);
1513 INIT_WORK(&hdev->power_off, hci_power_off);
1514 setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev);
1515
1516 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1517
1518 atomic_set(&hdev->promisc, 0);
1519
1520 write_unlock_bh(&hci_dev_list_lock);
1521
1522 hdev->workqueue = create_singlethread_workqueue(hdev->name);
1523 if (!hdev->workqueue)
1524 goto nomem;
1525
1526 hdev->tfm = crypto_alloc_blkcipher("ecb(aes)", 0, CRYPTO_ALG_ASYNC);
1527 if (IS_ERR(hdev->tfm))
1528 BT_INFO("Failed to load transform for ecb(aes): %ld",
1529 PTR_ERR(hdev->tfm));
1530
1531 hci_register_sysfs(hdev);
1532
1533 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1534 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1535 if (hdev->rfkill) {
1536 if (rfkill_register(hdev->rfkill) < 0) {
1537 rfkill_destroy(hdev->rfkill);
1538 hdev->rfkill = NULL;
1539 }
1540 }
1541
1542 set_bit(HCI_AUTO_OFF, &hdev->flags);
1543 set_bit(HCI_SETUP, &hdev->flags);
1544 queue_work(hdev->workqueue, &hdev->power_on);
1545
1546 hci_notify(hdev, HCI_DEV_REG);
1547
1548 return id;
1549
1550nomem:
1551 write_lock_bh(&hci_dev_list_lock);
1552 list_del(&hdev->list);
1553 write_unlock_bh(&hci_dev_list_lock);
1554
1555 return -ENOMEM;
1556}
1557EXPORT_SYMBOL(hci_register_dev);
1558
1559/* Unregister HCI device */
1560int hci_unregister_dev(struct hci_dev *hdev)
1561{
1562 int i;
1563
1564 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1565
1566 write_lock_bh(&hci_dev_list_lock);
1567 list_del(&hdev->list);
1568 write_unlock_bh(&hci_dev_list_lock);
1569
1570 hci_dev_do_close(hdev);
1571
1572 for (i = 0; i < NUM_REASSEMBLY; i++)
1573 kfree_skb(hdev->reassembly[i]);
1574
1575 if (!test_bit(HCI_INIT, &hdev->flags) &&
1576 !test_bit(HCI_SETUP, &hdev->flags))
1577 mgmt_index_removed(hdev->id);
1578
1579 if (!IS_ERR(hdev->tfm))
1580 crypto_free_blkcipher(hdev->tfm);
1581
1582 hci_notify(hdev, HCI_DEV_UNREG);
1583
1584 if (hdev->rfkill) {
1585 rfkill_unregister(hdev->rfkill);
1586 rfkill_destroy(hdev->rfkill);
1587 }
1588
1589 hci_unregister_sysfs(hdev);
1590
1591 hci_del_off_timer(hdev);
1592 del_timer(&hdev->adv_timer);
1593
1594 destroy_workqueue(hdev->workqueue);
1595
1596 hci_dev_lock_bh(hdev);
1597 hci_blacklist_clear(hdev);
1598 hci_uuids_clear(hdev);
1599 hci_link_keys_clear(hdev);
1600 hci_remote_oob_data_clear(hdev);
1601 hci_adv_entries_clear(hdev);
1602 hci_dev_unlock_bh(hdev);
1603
1604 __hci_dev_put(hdev);
1605
1606 return 0;
1607}
1608EXPORT_SYMBOL(hci_unregister_dev);
1609
1610/* Suspend HCI device */
1611int hci_suspend_dev(struct hci_dev *hdev)
1612{
1613 hci_notify(hdev, HCI_DEV_SUSPEND);
1614 return 0;
1615}
1616EXPORT_SYMBOL(hci_suspend_dev);
1617
1618/* Resume HCI device */
1619int hci_resume_dev(struct hci_dev *hdev)
1620{
1621 hci_notify(hdev, HCI_DEV_RESUME);
1622 return 0;
1623}
1624EXPORT_SYMBOL(hci_resume_dev);
1625
1626/* Receive frame from HCI drivers */
1627int hci_recv_frame(struct sk_buff *skb)
1628{
1629 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1630 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1631 && !test_bit(HCI_INIT, &hdev->flags))) {
1632 kfree_skb(skb);
1633 return -ENXIO;
1634 }
1635
1636 /* Incomming skb */
1637 bt_cb(skb)->incoming = 1;
1638
1639 /* Time stamp */
1640 __net_timestamp(skb);
1641
1642 /* Queue frame for rx task */
1643 skb_queue_tail(&hdev->rx_q, skb);
1644 tasklet_schedule(&hdev->rx_task);
1645
1646 return 0;
1647}
1648EXPORT_SYMBOL(hci_recv_frame);
1649
1650static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1651 int count, __u8 index)
1652{
1653 int len = 0;
1654 int hlen = 0;
1655 int remain = count;
1656 struct sk_buff *skb;
1657 struct bt_skb_cb *scb;
1658
1659 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1660 index >= NUM_REASSEMBLY)
1661 return -EILSEQ;
1662
1663 skb = hdev->reassembly[index];
1664
1665 if (!skb) {
1666 switch (type) {
1667 case HCI_ACLDATA_PKT:
1668 len = HCI_MAX_FRAME_SIZE;
1669 hlen = HCI_ACL_HDR_SIZE;
1670 break;
1671 case HCI_EVENT_PKT:
1672 len = HCI_MAX_EVENT_SIZE;
1673 hlen = HCI_EVENT_HDR_SIZE;
1674 break;
1675 case HCI_SCODATA_PKT:
1676 len = HCI_MAX_SCO_SIZE;
1677 hlen = HCI_SCO_HDR_SIZE;
1678 break;
1679 }
1680
1681 skb = bt_skb_alloc(len, GFP_ATOMIC);
1682 if (!skb)
1683 return -ENOMEM;
1684
1685 scb = (void *) skb->cb;
1686 scb->expect = hlen;
1687 scb->pkt_type = type;
1688
1689 skb->dev = (void *) hdev;
1690 hdev->reassembly[index] = skb;
1691 }
1692
1693 while (count) {
1694 scb = (void *) skb->cb;
1695 len = min(scb->expect, (__u16)count);
1696
1697 memcpy(skb_put(skb, len), data, len);
1698
1699 count -= len;
1700 data += len;
1701 scb->expect -= len;
1702 remain = count;
1703
1704 switch (type) {
1705 case HCI_EVENT_PKT:
1706 if (skb->len == HCI_EVENT_HDR_SIZE) {
1707 struct hci_event_hdr *h = hci_event_hdr(skb);
1708 scb->expect = h->plen;
1709
1710 if (skb_tailroom(skb) < scb->expect) {
1711 kfree_skb(skb);
1712 hdev->reassembly[index] = NULL;
1713 return -ENOMEM;
1714 }
1715 }
1716 break;
1717
1718 case HCI_ACLDATA_PKT:
1719 if (skb->len == HCI_ACL_HDR_SIZE) {
1720 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1721 scb->expect = __le16_to_cpu(h->dlen);
1722
1723 if (skb_tailroom(skb) < scb->expect) {
1724 kfree_skb(skb);
1725 hdev->reassembly[index] = NULL;
1726 return -ENOMEM;
1727 }
1728 }
1729 break;
1730
1731 case HCI_SCODATA_PKT:
1732 if (skb->len == HCI_SCO_HDR_SIZE) {
1733 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1734 scb->expect = h->dlen;
1735
1736 if (skb_tailroom(skb) < scb->expect) {
1737 kfree_skb(skb);
1738 hdev->reassembly[index] = NULL;
1739 return -ENOMEM;
1740 }
1741 }
1742 break;
1743 }
1744
1745 if (scb->expect == 0) {
1746 /* Complete frame */
1747
1748 bt_cb(skb)->pkt_type = type;
1749 hci_recv_frame(skb);
1750
1751 hdev->reassembly[index] = NULL;
1752 return remain;
1753 }
1754 }
1755
1756 return remain;
1757}
1758
1759int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1760{
1761 int rem = 0;
1762
1763 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1764 return -EILSEQ;
1765
1766 while (count) {
1767 rem = hci_reassembly(hdev, type, data, count, type - 1);
1768 if (rem < 0)
1769 return rem;
1770
1771 data += (count - rem);
1772 count = rem;
1773 }
1774
1775 return rem;
1776}
1777EXPORT_SYMBOL(hci_recv_fragment);
1778
1779#define STREAM_REASSEMBLY 0
1780
1781int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1782{
1783 int type;
1784 int rem = 0;
1785
1786 while (count) {
1787 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1788
1789 if (!skb) {
1790 struct { char type; } *pkt;
1791
1792 /* Start of the frame */
1793 pkt = data;
1794 type = pkt->type;
1795
1796 data++;
1797 count--;
1798 } else
1799 type = bt_cb(skb)->pkt_type;
1800
1801 rem = hci_reassembly(hdev, type, data, count,
1802 STREAM_REASSEMBLY);
1803 if (rem < 0)
1804 return rem;
1805
1806 data += (count - rem);
1807 count = rem;
1808 }
1809
1810 return rem;
1811}
1812EXPORT_SYMBOL(hci_recv_stream_fragment);
1813
1814/* ---- Interface to upper protocols ---- */
1815
1816/* Register/Unregister protocols.
1817 * hci_task_lock is used to ensure that no tasks are running. */
1818int hci_register_proto(struct hci_proto *hp)
1819{
1820 int err = 0;
1821
1822 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1823
1824 if (hp->id >= HCI_MAX_PROTO)
1825 return -EINVAL;
1826
1827 write_lock_bh(&hci_task_lock);
1828
1829 if (!hci_proto[hp->id])
1830 hci_proto[hp->id] = hp;
1831 else
1832 err = -EEXIST;
1833
1834 write_unlock_bh(&hci_task_lock);
1835
1836 return err;
1837}
1838EXPORT_SYMBOL(hci_register_proto);
1839
1840int hci_unregister_proto(struct hci_proto *hp)
1841{
1842 int err = 0;
1843
1844 BT_DBG("%p name %s id %d", hp, hp->name, hp->id);
1845
1846 if (hp->id >= HCI_MAX_PROTO)
1847 return -EINVAL;
1848
1849 write_lock_bh(&hci_task_lock);
1850
1851 if (hci_proto[hp->id])
1852 hci_proto[hp->id] = NULL;
1853 else
1854 err = -ENOENT;
1855
1856 write_unlock_bh(&hci_task_lock);
1857
1858 return err;
1859}
1860EXPORT_SYMBOL(hci_unregister_proto);
1861
1862int hci_register_cb(struct hci_cb *cb)
1863{
1864 BT_DBG("%p name %s", cb, cb->name);
1865
1866 write_lock_bh(&hci_cb_list_lock);
1867 list_add(&cb->list, &hci_cb_list);
1868 write_unlock_bh(&hci_cb_list_lock);
1869
1870 return 0;
1871}
1872EXPORT_SYMBOL(hci_register_cb);
1873
1874int hci_unregister_cb(struct hci_cb *cb)
1875{
1876 BT_DBG("%p name %s", cb, cb->name);
1877
1878 write_lock_bh(&hci_cb_list_lock);
1879 list_del(&cb->list);
1880 write_unlock_bh(&hci_cb_list_lock);
1881
1882 return 0;
1883}
1884EXPORT_SYMBOL(hci_unregister_cb);
1885
1886static int hci_send_frame(struct sk_buff *skb)
1887{
1888 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1889
1890 if (!hdev) {
1891 kfree_skb(skb);
1892 return -ENODEV;
1893 }
1894
1895 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1896
1897 if (atomic_read(&hdev->promisc)) {
1898 /* Time stamp */
1899 __net_timestamp(skb);
1900
1901 hci_send_to_sock(hdev, skb, NULL);
1902 }
1903
1904 /* Get rid of skb owner, prior to sending to the driver. */
1905 skb_orphan(skb);
1906
1907 return hdev->send(skb);
1908}
1909
1910/* Send HCI command */
1911int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1912{
1913 int len = HCI_COMMAND_HDR_SIZE + plen;
1914 struct hci_command_hdr *hdr;
1915 struct sk_buff *skb;
1916
1917 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1918
1919 skb = bt_skb_alloc(len, GFP_ATOMIC);
1920 if (!skb) {
1921 BT_ERR("%s no memory for command", hdev->name);
1922 return -ENOMEM;
1923 }
1924
1925 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
1926 hdr->opcode = cpu_to_le16(opcode);
1927 hdr->plen = plen;
1928
1929 if (plen)
1930 memcpy(skb_put(skb, plen), param, plen);
1931
1932 BT_DBG("skb len %d", skb->len);
1933
1934 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1935 skb->dev = (void *) hdev;
1936
1937 if (test_bit(HCI_INIT, &hdev->flags))
1938 hdev->init_last_cmd = opcode;
1939
1940 skb_queue_tail(&hdev->cmd_q, skb);
1941 tasklet_schedule(&hdev->cmd_task);
1942
1943 return 0;
1944}
1945
1946/* Get data from the previously sent command */
1947void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1948{
1949 struct hci_command_hdr *hdr;
1950
1951 if (!hdev->sent_cmd)
1952 return NULL;
1953
1954 hdr = (void *) hdev->sent_cmd->data;
1955
1956 if (hdr->opcode != cpu_to_le16(opcode))
1957 return NULL;
1958
1959 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1960
1961 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
1962}
1963
1964/* Send ACL data */
1965static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
1966{
1967 struct hci_acl_hdr *hdr;
1968 int len = skb->len;
1969
1970 skb_push(skb, HCI_ACL_HDR_SIZE);
1971 skb_reset_transport_header(skb);
1972 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
1973 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
1974 hdr->dlen = cpu_to_le16(len);
1975}
1976
1977void hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
1978{
1979 struct hci_dev *hdev = conn->hdev;
1980 struct sk_buff *list;
1981
1982 BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
1983
1984 skb->dev = (void *) hdev;
1985 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
1986 hci_add_acl_hdr(skb, conn->handle, flags);
1987
1988 list = skb_shinfo(skb)->frag_list;
1989 if (!list) {
1990 /* Non fragmented */
1991 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
1992
1993 skb_queue_tail(&conn->data_q, skb);
1994 } else {
1995 /* Fragmented */
1996 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
1997
1998 skb_shinfo(skb)->frag_list = NULL;
1999
2000 /* Queue all fragments atomically */
2001 spin_lock_bh(&conn->data_q.lock);
2002
2003 __skb_queue_tail(&conn->data_q, skb);
2004
2005 flags &= ~ACL_START;
2006 flags |= ACL_CONT;
2007 do {
2008 skb = list; list = list->next;
2009
2010 skb->dev = (void *) hdev;
2011 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2012 hci_add_acl_hdr(skb, conn->handle, flags);
2013
2014 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2015
2016 __skb_queue_tail(&conn->data_q, skb);
2017 } while (list);
2018
2019 spin_unlock_bh(&conn->data_q.lock);
2020 }
2021
2022 tasklet_schedule(&hdev->tx_task);
2023}
2024EXPORT_SYMBOL(hci_send_acl);
2025
2026/* Send SCO data */
2027void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2028{
2029 struct hci_dev *hdev = conn->hdev;
2030 struct hci_sco_hdr hdr;
2031
2032 BT_DBG("%s len %d", hdev->name, skb->len);
2033
2034 hdr.handle = cpu_to_le16(conn->handle);
2035 hdr.dlen = skb->len;
2036
2037 skb_push(skb, HCI_SCO_HDR_SIZE);
2038 skb_reset_transport_header(skb);
2039 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2040
2041 skb->dev = (void *) hdev;
2042 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2043
2044 skb_queue_tail(&conn->data_q, skb);
2045 tasklet_schedule(&hdev->tx_task);
2046}
2047EXPORT_SYMBOL(hci_send_sco);
2048
2049/* ---- HCI TX task (outgoing data) ---- */
2050
2051/* HCI Connection scheduler */
2052static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2053{
2054 struct hci_conn_hash *h = &hdev->conn_hash;
2055 struct hci_conn *conn = NULL;
2056 int num = 0, min = ~0;
2057 struct list_head *p;
2058
2059 /* We don't have to lock device here. Connections are always
2060 * added and removed with TX task disabled. */
2061 list_for_each(p, &h->list) {
2062 struct hci_conn *c;
2063 c = list_entry(p, struct hci_conn, list);
2064
2065 if (c->type != type || skb_queue_empty(&c->data_q))
2066 continue;
2067
2068 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2069 continue;
2070
2071 num++;
2072
2073 if (c->sent < min) {
2074 min = c->sent;
2075 conn = c;
2076 }
2077 }
2078
2079 if (conn) {
2080 int cnt, q;
2081
2082 switch (conn->type) {
2083 case ACL_LINK:
2084 cnt = hdev->acl_cnt;
2085 break;
2086 case SCO_LINK:
2087 case ESCO_LINK:
2088 cnt = hdev->sco_cnt;
2089 break;
2090 case LE_LINK:
2091 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2092 break;
2093 default:
2094 cnt = 0;
2095 BT_ERR("Unknown link type");
2096 }
2097
2098 q = cnt / num;
2099 *quote = q ? q : 1;
2100 } else
2101 *quote = 0;
2102
2103 BT_DBG("conn %p quote %d", conn, *quote);
2104 return conn;
2105}
2106
2107static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2108{
2109 struct hci_conn_hash *h = &hdev->conn_hash;
2110 struct list_head *p;
2111 struct hci_conn *c;
2112
2113 BT_ERR("%s link tx timeout", hdev->name);
2114
2115 /* Kill stalled connections */
2116 list_for_each(p, &h->list) {
2117 c = list_entry(p, struct hci_conn, list);
2118 if (c->type == type && c->sent) {
2119 BT_ERR("%s killing stalled connection %s",
2120 hdev->name, batostr(&c->dst));
2121 hci_acl_disconn(c, 0x13);
2122 }
2123 }
2124}
2125
2126static inline void hci_sched_acl(struct hci_dev *hdev)
2127{
2128 struct hci_conn *conn;
2129 struct sk_buff *skb;
2130 int quote;
2131
2132 BT_DBG("%s", hdev->name);
2133
2134 if (!test_bit(HCI_RAW, &hdev->flags)) {
2135 /* ACL tx timeout must be longer than maximum
2136 * link supervision timeout (40.9 seconds) */
2137 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
2138 hci_link_tx_to(hdev, ACL_LINK);
2139 }
2140
2141 while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) {
2142 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2143 BT_DBG("skb %p len %d", skb, skb->len);
2144
2145 hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active);
2146
2147 hci_send_frame(skb);
2148 hdev->acl_last_tx = jiffies;
2149
2150 hdev->acl_cnt--;
2151 conn->sent++;
2152 }
2153 }
2154}
2155
2156/* Schedule SCO */
2157static inline void hci_sched_sco(struct hci_dev *hdev)
2158{
2159 struct hci_conn *conn;
2160 struct sk_buff *skb;
2161 int quote;
2162
2163 BT_DBG("%s", hdev->name);
2164
2165 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
2166 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2167 BT_DBG("skb %p len %d", skb, skb->len);
2168 hci_send_frame(skb);
2169
2170 conn->sent++;
2171 if (conn->sent == ~0)
2172 conn->sent = 0;
2173 }
2174 }
2175}
2176
2177static inline void hci_sched_esco(struct hci_dev *hdev)
2178{
2179 struct hci_conn *conn;
2180 struct sk_buff *skb;
2181 int quote;
2182
2183 BT_DBG("%s", hdev->name);
2184
2185 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) {
2186 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2187 BT_DBG("skb %p len %d", skb, skb->len);
2188 hci_send_frame(skb);
2189
2190 conn->sent++;
2191 if (conn->sent == ~0)
2192 conn->sent = 0;
2193 }
2194 }
2195}
2196
2197static inline void hci_sched_le(struct hci_dev *hdev)
2198{
2199 struct hci_conn *conn;
2200 struct sk_buff *skb;
2201 int quote, cnt;
2202
2203 BT_DBG("%s", hdev->name);
2204
2205 if (!test_bit(HCI_RAW, &hdev->flags)) {
2206 /* LE tx timeout must be longer than maximum
2207 * link supervision timeout (40.9 seconds) */
2208 if (!hdev->le_cnt && hdev->le_pkts &&
2209 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2210 hci_link_tx_to(hdev, LE_LINK);
2211 }
2212
2213 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2214 while (cnt && (conn = hci_low_sent(hdev, LE_LINK, "e))) {
2215 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2216 BT_DBG("skb %p len %d", skb, skb->len);
2217
2218 hci_send_frame(skb);
2219 hdev->le_last_tx = jiffies;
2220
2221 cnt--;
2222 conn->sent++;
2223 }
2224 }
2225 if (hdev->le_pkts)
2226 hdev->le_cnt = cnt;
2227 else
2228 hdev->acl_cnt = cnt;
2229}
2230
2231static void hci_tx_task(unsigned long arg)
2232{
2233 struct hci_dev *hdev = (struct hci_dev *) arg;
2234 struct sk_buff *skb;
2235
2236 read_lock(&hci_task_lock);
2237
2238 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2239 hdev->sco_cnt, hdev->le_cnt);
2240
2241 /* Schedule queues and send stuff to HCI driver */
2242
2243 hci_sched_acl(hdev);
2244
2245 hci_sched_sco(hdev);
2246
2247 hci_sched_esco(hdev);
2248
2249 hci_sched_le(hdev);
2250
2251 /* Send next queued raw (unknown type) packet */
2252 while ((skb = skb_dequeue(&hdev->raw_q)))
2253 hci_send_frame(skb);
2254
2255 read_unlock(&hci_task_lock);
2256}
2257
2258/* ----- HCI RX task (incoming data processing) ----- */
2259
2260/* ACL data packet */
2261static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2262{
2263 struct hci_acl_hdr *hdr = (void *) skb->data;
2264 struct hci_conn *conn;
2265 __u16 handle, flags;
2266
2267 skb_pull(skb, HCI_ACL_HDR_SIZE);
2268
2269 handle = __le16_to_cpu(hdr->handle);
2270 flags = hci_flags(handle);
2271 handle = hci_handle(handle);
2272
2273 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2274
2275 hdev->stat.acl_rx++;
2276
2277 hci_dev_lock(hdev);
2278 conn = hci_conn_hash_lookup_handle(hdev, handle);
2279 hci_dev_unlock(hdev);
2280
2281 if (conn) {
2282 register struct hci_proto *hp;
2283
2284 hci_conn_enter_active_mode(conn, bt_cb(skb)->force_active);
2285
2286 /* Send to upper protocol */
2287 hp = hci_proto[HCI_PROTO_L2CAP];
2288 if (hp && hp->recv_acldata) {
2289 hp->recv_acldata(conn, skb, flags);
2290 return;
2291 }
2292 } else {
2293 BT_ERR("%s ACL packet for unknown connection handle %d",
2294 hdev->name, handle);
2295 }
2296
2297 kfree_skb(skb);
2298}
2299
2300/* SCO data packet */
2301static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2302{
2303 struct hci_sco_hdr *hdr = (void *) skb->data;
2304 struct hci_conn *conn;
2305 __u16 handle;
2306
2307 skb_pull(skb, HCI_SCO_HDR_SIZE);
2308
2309 handle = __le16_to_cpu(hdr->handle);
2310
2311 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2312
2313 hdev->stat.sco_rx++;
2314
2315 hci_dev_lock(hdev);
2316 conn = hci_conn_hash_lookup_handle(hdev, handle);
2317 hci_dev_unlock(hdev);
2318
2319 if (conn) {
2320 register struct hci_proto *hp;
2321
2322 /* Send to upper protocol */
2323 hp = hci_proto[HCI_PROTO_SCO];
2324 if (hp && hp->recv_scodata) {
2325 hp->recv_scodata(conn, skb);
2326 return;
2327 }
2328 } else {
2329 BT_ERR("%s SCO packet for unknown connection handle %d",
2330 hdev->name, handle);
2331 }
2332
2333 kfree_skb(skb);
2334}
2335
2336static void hci_rx_task(unsigned long arg)
2337{
2338 struct hci_dev *hdev = (struct hci_dev *) arg;
2339 struct sk_buff *skb;
2340
2341 BT_DBG("%s", hdev->name);
2342
2343 read_lock(&hci_task_lock);
2344
2345 while ((skb = skb_dequeue(&hdev->rx_q))) {
2346 if (atomic_read(&hdev->promisc)) {
2347 /* Send copy to the sockets */
2348 hci_send_to_sock(hdev, skb, NULL);
2349 }
2350
2351 if (test_bit(HCI_RAW, &hdev->flags)) {
2352 kfree_skb(skb);
2353 continue;
2354 }
2355
2356 if (test_bit(HCI_INIT, &hdev->flags)) {
2357 /* Don't process data packets in this states. */
2358 switch (bt_cb(skb)->pkt_type) {
2359 case HCI_ACLDATA_PKT:
2360 case HCI_SCODATA_PKT:
2361 kfree_skb(skb);
2362 continue;
2363 }
2364 }
2365
2366 /* Process frame */
2367 switch (bt_cb(skb)->pkt_type) {
2368 case HCI_EVENT_PKT:
2369 hci_event_packet(hdev, skb);
2370 break;
2371
2372 case HCI_ACLDATA_PKT:
2373 BT_DBG("%s ACL data packet", hdev->name);
2374 hci_acldata_packet(hdev, skb);
2375 break;
2376
2377 case HCI_SCODATA_PKT:
2378 BT_DBG("%s SCO data packet", hdev->name);
2379 hci_scodata_packet(hdev, skb);
2380 break;
2381
2382 default:
2383 kfree_skb(skb);
2384 break;
2385 }
2386 }
2387
2388 read_unlock(&hci_task_lock);
2389}
2390
2391static void hci_cmd_task(unsigned long arg)
2392{
2393 struct hci_dev *hdev = (struct hci_dev *) arg;
2394 struct sk_buff *skb;
2395
2396 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2397
2398 /* Send queued commands */
2399 if (atomic_read(&hdev->cmd_cnt)) {
2400 skb = skb_dequeue(&hdev->cmd_q);
2401 if (!skb)
2402 return;
2403
2404 kfree_skb(hdev->sent_cmd);
2405
2406 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2407 if (hdev->sent_cmd) {
2408 atomic_dec(&hdev->cmd_cnt);
2409 hci_send_frame(skb);
2410 if (test_bit(HCI_RESET, &hdev->flags))
2411 del_timer(&hdev->cmd_timer);
2412 else
2413 mod_timer(&hdev->cmd_timer,
2414 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
2415 } else {
2416 skb_queue_head(&hdev->cmd_q, skb);
2417 tasklet_schedule(&hdev->cmd_task);
2418 }
2419 }
2420}