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Bluetooth: Correct type for hdev lmp_subver
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
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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/jiffies.h>
29#include <linux/module.h>
30#include <linux/kmod.h>
31
32#include <linux/types.h>
33#include <linux/errno.h>
34#include <linux/kernel.h>
35#include <linux/sched.h>
36#include <linux/slab.h>
37#include <linux/poll.h>
38#include <linux/fcntl.h>
39#include <linux/init.h>
40#include <linux/skbuff.h>
41#include <linux/workqueue.h>
42#include <linux/interrupt.h>
43#include <linux/rfkill.h>
44#include <linux/timer.h>
45#include <linux/crypto.h>
46#include <net/sock.h>
47
48#include <linux/uaccess.h>
49#include <asm/unaligned.h>
50
51#include <net/bluetooth/bluetooth.h>
52#include <net/bluetooth/hci_core.h>
53
54#define AUTO_OFF_TIMEOUT 2000
55
56static void hci_rx_work(struct work_struct *work);
57static void hci_cmd_work(struct work_struct *work);
58static void hci_tx_work(struct work_struct *work);
59
60/* HCI device list */
61LIST_HEAD(hci_dev_list);
62DEFINE_RWLOCK(hci_dev_list_lock);
63
64/* HCI callback list */
65LIST_HEAD(hci_cb_list);
66DEFINE_RWLOCK(hci_cb_list_lock);
67
68/* ---- HCI notifications ---- */
69
70static void hci_notify(struct hci_dev *hdev, int event)
71{
72 hci_sock_dev_event(hdev, event);
73}
74
75/* ---- HCI requests ---- */
76
77void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
78{
79 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
80
81 /* If this is the init phase check if the completed command matches
82 * the last init command, and if not just return.
83 */
84 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
85 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
86 struct sk_buff *skb;
87
88 /* Some CSR based controllers generate a spontaneous
89 * reset complete event during init and any pending
90 * command will never be completed. In such a case we
91 * need to resend whatever was the last sent
92 * command.
93 */
94
95 if (cmd != HCI_OP_RESET || sent->opcode == HCI_OP_RESET)
96 return;
97
98 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
99 if (skb) {
100 skb_queue_head(&hdev->cmd_q, skb);
101 queue_work(hdev->workqueue, &hdev->cmd_work);
102 }
103
104 return;
105 }
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 bredr_init(struct hci_dev *hdev)
194{
195 struct hci_cp_delete_stored_link_key cp;
196 __le16 param;
197 __u8 flt_type;
198
199 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
200
201 /* Mandatory initialization */
202
203 /* Reset */
204 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
205 set_bit(HCI_RESET, &hdev->flags);
206 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
207 }
208
209 /* Read Local Supported Features */
210 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
211
212 /* Read Local Version */
213 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
214
215 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
216 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
217
218 /* Read BD Address */
219 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
220
221 /* Read Class of Device */
222 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
223
224 /* Read Local Name */
225 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
226
227 /* Read Voice Setting */
228 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
229
230 /* Optional initialization */
231
232 /* Clear Event Filters */
233 flt_type = HCI_FLT_CLEAR_ALL;
234 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
235
236 /* Connection accept timeout ~20 secs */
237 param = cpu_to_le16(0x7d00);
238 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
239
240 bacpy(&cp.bdaddr, BDADDR_ANY);
241 cp.delete_all = 1;
242 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
243}
244
245static void amp_init(struct hci_dev *hdev)
246{
247 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
248
249 /* Reset */
250 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
251
252 /* Read Local Version */
253 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
254}
255
256static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
257{
258 struct sk_buff *skb;
259
260 BT_DBG("%s %ld", hdev->name, opt);
261
262 /* Driver initialization */
263
264 /* Special commands */
265 while ((skb = skb_dequeue(&hdev->driver_init))) {
266 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
267 skb->dev = (void *) hdev;
268
269 skb_queue_tail(&hdev->cmd_q, skb);
270 queue_work(hdev->workqueue, &hdev->cmd_work);
271 }
272 skb_queue_purge(&hdev->driver_init);
273
274 switch (hdev->dev_type) {
275 case HCI_BREDR:
276 bredr_init(hdev);
277 break;
278
279 case HCI_AMP:
280 amp_init(hdev);
281 break;
282
283 default:
284 BT_ERR("Unknown device type %d", hdev->dev_type);
285 break;
286 }
287
288}
289
290static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
291{
292 BT_DBG("%s", hdev->name);
293
294 /* Read LE buffer size */
295 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
296}
297
298static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
299{
300 __u8 scan = opt;
301
302 BT_DBG("%s %x", hdev->name, scan);
303
304 /* Inquiry and Page scans */
305 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
306}
307
308static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
309{
310 __u8 auth = opt;
311
312 BT_DBG("%s %x", hdev->name, auth);
313
314 /* Authentication */
315 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
316}
317
318static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
319{
320 __u8 encrypt = opt;
321
322 BT_DBG("%s %x", hdev->name, encrypt);
323
324 /* Encryption */
325 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
326}
327
328static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
329{
330 __le16 policy = cpu_to_le16(opt);
331
332 BT_DBG("%s %x", hdev->name, policy);
333
334 /* Default link policy */
335 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
336}
337
338/* Get HCI device by index.
339 * Device is held on return. */
340struct hci_dev *hci_dev_get(int index)
341{
342 struct hci_dev *hdev = NULL, *d;
343
344 BT_DBG("%d", index);
345
346 if (index < 0)
347 return NULL;
348
349 read_lock(&hci_dev_list_lock);
350 list_for_each_entry(d, &hci_dev_list, list) {
351 if (d->id == index) {
352 hdev = hci_dev_hold(d);
353 break;
354 }
355 }
356 read_unlock(&hci_dev_list_lock);
357 return hdev;
358}
359
360/* ---- Inquiry support ---- */
361
362bool hci_discovery_active(struct hci_dev *hdev)
363{
364 struct discovery_state *discov = &hdev->discovery;
365
366 switch (discov->state) {
367 case DISCOVERY_FINDING:
368 case DISCOVERY_RESOLVING:
369 return true;
370
371 default:
372 return false;
373 }
374}
375
376void hci_discovery_set_state(struct hci_dev *hdev, int state)
377{
378 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
379
380 if (hdev->discovery.state == state)
381 return;
382
383 switch (state) {
384 case DISCOVERY_STOPPED:
385 if (hdev->discovery.state != DISCOVERY_STARTING)
386 mgmt_discovering(hdev, 0);
387 hdev->discovery.type = 0;
388 break;
389 case DISCOVERY_STARTING:
390 break;
391 case DISCOVERY_FINDING:
392 mgmt_discovering(hdev, 1);
393 break;
394 case DISCOVERY_RESOLVING:
395 break;
396 case DISCOVERY_STOPPING:
397 break;
398 }
399
400 hdev->discovery.state = state;
401}
402
403static void inquiry_cache_flush(struct hci_dev *hdev)
404{
405 struct discovery_state *cache = &hdev->discovery;
406 struct inquiry_entry *p, *n;
407
408 list_for_each_entry_safe(p, n, &cache->all, all) {
409 list_del(&p->all);
410 kfree(p);
411 }
412
413 INIT_LIST_HEAD(&cache->unknown);
414 INIT_LIST_HEAD(&cache->resolve);
415}
416
417struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
418{
419 struct discovery_state *cache = &hdev->discovery;
420 struct inquiry_entry *e;
421
422 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
423
424 list_for_each_entry(e, &cache->all, all) {
425 if (!bacmp(&e->data.bdaddr, bdaddr))
426 return e;
427 }
428
429 return NULL;
430}
431
432struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
433 bdaddr_t *bdaddr)
434{
435 struct discovery_state *cache = &hdev->discovery;
436 struct inquiry_entry *e;
437
438 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
439
440 list_for_each_entry(e, &cache->unknown, list) {
441 if (!bacmp(&e->data.bdaddr, bdaddr))
442 return e;
443 }
444
445 return NULL;
446}
447
448struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
449 bdaddr_t *bdaddr,
450 int state)
451{
452 struct discovery_state *cache = &hdev->discovery;
453 struct inquiry_entry *e;
454
455 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
456
457 list_for_each_entry(e, &cache->resolve, list) {
458 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
459 return e;
460 if (!bacmp(&e->data.bdaddr, bdaddr))
461 return e;
462 }
463
464 return NULL;
465}
466
467void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
468 struct inquiry_entry *ie)
469{
470 struct discovery_state *cache = &hdev->discovery;
471 struct list_head *pos = &cache->resolve;
472 struct inquiry_entry *p;
473
474 list_del(&ie->list);
475
476 list_for_each_entry(p, &cache->resolve, list) {
477 if (p->name_state != NAME_PENDING &&
478 abs(p->data.rssi) >= abs(ie->data.rssi))
479 break;
480 pos = &p->list;
481 }
482
483 list_add(&ie->list, pos);
484}
485
486bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
487 bool name_known, bool *ssp)
488{
489 struct discovery_state *cache = &hdev->discovery;
490 struct inquiry_entry *ie;
491
492 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
493
494 if (ssp)
495 *ssp = data->ssp_mode;
496
497 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
498 if (ie) {
499 if (ie->data.ssp_mode && ssp)
500 *ssp = true;
501
502 if (ie->name_state == NAME_NEEDED &&
503 data->rssi != ie->data.rssi) {
504 ie->data.rssi = data->rssi;
505 hci_inquiry_cache_update_resolve(hdev, ie);
506 }
507
508 goto update;
509 }
510
511 /* Entry not in the cache. Add new one. */
512 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
513 if (!ie)
514 return false;
515
516 list_add(&ie->all, &cache->all);
517
518 if (name_known) {
519 ie->name_state = NAME_KNOWN;
520 } else {
521 ie->name_state = NAME_NOT_KNOWN;
522 list_add(&ie->list, &cache->unknown);
523 }
524
525update:
526 if (name_known && ie->name_state != NAME_KNOWN &&
527 ie->name_state != NAME_PENDING) {
528 ie->name_state = NAME_KNOWN;
529 list_del(&ie->list);
530 }
531
532 memcpy(&ie->data, data, sizeof(*data));
533 ie->timestamp = jiffies;
534 cache->timestamp = jiffies;
535
536 if (ie->name_state == NAME_NOT_KNOWN)
537 return false;
538
539 return true;
540}
541
542static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
543{
544 struct discovery_state *cache = &hdev->discovery;
545 struct inquiry_info *info = (struct inquiry_info *) buf;
546 struct inquiry_entry *e;
547 int copied = 0;
548
549 list_for_each_entry(e, &cache->all, all) {
550 struct inquiry_data *data = &e->data;
551
552 if (copied >= num)
553 break;
554
555 bacpy(&info->bdaddr, &data->bdaddr);
556 info->pscan_rep_mode = data->pscan_rep_mode;
557 info->pscan_period_mode = data->pscan_period_mode;
558 info->pscan_mode = data->pscan_mode;
559 memcpy(info->dev_class, data->dev_class, 3);
560 info->clock_offset = data->clock_offset;
561
562 info++;
563 copied++;
564 }
565
566 BT_DBG("cache %p, copied %d", cache, copied);
567 return copied;
568}
569
570static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
571{
572 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
573 struct hci_cp_inquiry cp;
574
575 BT_DBG("%s", hdev->name);
576
577 if (test_bit(HCI_INQUIRY, &hdev->flags))
578 return;
579
580 /* Start Inquiry */
581 memcpy(&cp.lap, &ir->lap, 3);
582 cp.length = ir->length;
583 cp.num_rsp = ir->num_rsp;
584 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
585}
586
587int hci_inquiry(void __user *arg)
588{
589 __u8 __user *ptr = arg;
590 struct hci_inquiry_req ir;
591 struct hci_dev *hdev;
592 int err = 0, do_inquiry = 0, max_rsp;
593 long timeo;
594 __u8 *buf;
595
596 if (copy_from_user(&ir, ptr, sizeof(ir)))
597 return -EFAULT;
598
599 hdev = hci_dev_get(ir.dev_id);
600 if (!hdev)
601 return -ENODEV;
602
603 hci_dev_lock(hdev);
604 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
605 inquiry_cache_empty(hdev) ||
606 ir.flags & IREQ_CACHE_FLUSH) {
607 inquiry_cache_flush(hdev);
608 do_inquiry = 1;
609 }
610 hci_dev_unlock(hdev);
611
612 timeo = ir.length * msecs_to_jiffies(2000);
613
614 if (do_inquiry) {
615 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
616 if (err < 0)
617 goto done;
618 }
619
620 /* for unlimited number of responses we will use buffer with 255 entries */
621 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
622
623 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
624 * copy it to the user space.
625 */
626 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
627 if (!buf) {
628 err = -ENOMEM;
629 goto done;
630 }
631
632 hci_dev_lock(hdev);
633 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
634 hci_dev_unlock(hdev);
635
636 BT_DBG("num_rsp %d", ir.num_rsp);
637
638 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
639 ptr += sizeof(ir);
640 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
641 ir.num_rsp))
642 err = -EFAULT;
643 } else
644 err = -EFAULT;
645
646 kfree(buf);
647
648done:
649 hci_dev_put(hdev);
650 return err;
651}
652
653/* ---- HCI ioctl helpers ---- */
654
655int hci_dev_open(__u16 dev)
656{
657 struct hci_dev *hdev;
658 int ret = 0;
659
660 hdev = hci_dev_get(dev);
661 if (!hdev)
662 return -ENODEV;
663
664 BT_DBG("%s %p", hdev->name, hdev);
665
666 hci_req_lock(hdev);
667
668 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
669 ret = -ENODEV;
670 goto done;
671 }
672
673 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
674 ret = -ERFKILL;
675 goto done;
676 }
677
678 if (test_bit(HCI_UP, &hdev->flags)) {
679 ret = -EALREADY;
680 goto done;
681 }
682
683 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
684 set_bit(HCI_RAW, &hdev->flags);
685
686 /* Treat all non BR/EDR controllers as raw devices if
687 enable_hs is not set */
688 if (hdev->dev_type != HCI_BREDR && !enable_hs)
689 set_bit(HCI_RAW, &hdev->flags);
690
691 if (hdev->open(hdev)) {
692 ret = -EIO;
693 goto done;
694 }
695
696 if (!test_bit(HCI_RAW, &hdev->flags)) {
697 atomic_set(&hdev->cmd_cnt, 1);
698 set_bit(HCI_INIT, &hdev->flags);
699 hdev->init_last_cmd = 0;
700
701 ret = __hci_request(hdev, hci_init_req, 0,
702 msecs_to_jiffies(HCI_INIT_TIMEOUT));
703
704 if (lmp_host_le_capable(hdev))
705 ret = __hci_request(hdev, hci_le_init_req, 0,
706 msecs_to_jiffies(HCI_INIT_TIMEOUT));
707
708 clear_bit(HCI_INIT, &hdev->flags);
709 }
710
711 if (!ret) {
712 hci_dev_hold(hdev);
713 set_bit(HCI_UP, &hdev->flags);
714 hci_notify(hdev, HCI_DEV_UP);
715 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
716 hci_dev_lock(hdev);
717 mgmt_powered(hdev, 1);
718 hci_dev_unlock(hdev);
719 }
720 } else {
721 /* Init failed, cleanup */
722 flush_work(&hdev->tx_work);
723 flush_work(&hdev->cmd_work);
724 flush_work(&hdev->rx_work);
725
726 skb_queue_purge(&hdev->cmd_q);
727 skb_queue_purge(&hdev->rx_q);
728
729 if (hdev->flush)
730 hdev->flush(hdev);
731
732 if (hdev->sent_cmd) {
733 kfree_skb(hdev->sent_cmd);
734 hdev->sent_cmd = NULL;
735 }
736
737 hdev->close(hdev);
738 hdev->flags = 0;
739 }
740
741done:
742 hci_req_unlock(hdev);
743 hci_dev_put(hdev);
744 return ret;
745}
746
747static int hci_dev_do_close(struct hci_dev *hdev)
748{
749 BT_DBG("%s %p", hdev->name, hdev);
750
751 cancel_work_sync(&hdev->le_scan);
752
753 hci_req_cancel(hdev, ENODEV);
754 hci_req_lock(hdev);
755
756 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
757 del_timer_sync(&hdev->cmd_timer);
758 hci_req_unlock(hdev);
759 return 0;
760 }
761
762 /* Flush RX and TX works */
763 flush_work(&hdev->tx_work);
764 flush_work(&hdev->rx_work);
765
766 if (hdev->discov_timeout > 0) {
767 cancel_delayed_work(&hdev->discov_off);
768 hdev->discov_timeout = 0;
769 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
770 }
771
772 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
773 cancel_delayed_work(&hdev->service_cache);
774
775 cancel_delayed_work_sync(&hdev->le_scan_disable);
776
777 hci_dev_lock(hdev);
778 inquiry_cache_flush(hdev);
779 hci_conn_hash_flush(hdev);
780 hci_dev_unlock(hdev);
781
782 hci_notify(hdev, HCI_DEV_DOWN);
783
784 if (hdev->flush)
785 hdev->flush(hdev);
786
787 /* Reset device */
788 skb_queue_purge(&hdev->cmd_q);
789 atomic_set(&hdev->cmd_cnt, 1);
790 if (!test_bit(HCI_RAW, &hdev->flags) &&
791 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
792 set_bit(HCI_INIT, &hdev->flags);
793 __hci_request(hdev, hci_reset_req, 0,
794 msecs_to_jiffies(250));
795 clear_bit(HCI_INIT, &hdev->flags);
796 }
797
798 /* flush cmd work */
799 flush_work(&hdev->cmd_work);
800
801 /* Drop queues */
802 skb_queue_purge(&hdev->rx_q);
803 skb_queue_purge(&hdev->cmd_q);
804 skb_queue_purge(&hdev->raw_q);
805
806 /* Drop last sent command */
807 if (hdev->sent_cmd) {
808 del_timer_sync(&hdev->cmd_timer);
809 kfree_skb(hdev->sent_cmd);
810 hdev->sent_cmd = NULL;
811 }
812
813 /* After this point our queues are empty
814 * and no tasks are scheduled. */
815 hdev->close(hdev);
816
817 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
818 hci_dev_lock(hdev);
819 mgmt_powered(hdev, 0);
820 hci_dev_unlock(hdev);
821 }
822
823 /* Clear flags */
824 hdev->flags = 0;
825
826 memset(hdev->eir, 0, sizeof(hdev->eir));
827 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
828
829 hci_req_unlock(hdev);
830
831 hci_dev_put(hdev);
832 return 0;
833}
834
835int hci_dev_close(__u16 dev)
836{
837 struct hci_dev *hdev;
838 int err;
839
840 hdev = hci_dev_get(dev);
841 if (!hdev)
842 return -ENODEV;
843
844 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
845 cancel_delayed_work(&hdev->power_off);
846
847 err = hci_dev_do_close(hdev);
848
849 hci_dev_put(hdev);
850 return err;
851}
852
853int hci_dev_reset(__u16 dev)
854{
855 struct hci_dev *hdev;
856 int ret = 0;
857
858 hdev = hci_dev_get(dev);
859 if (!hdev)
860 return -ENODEV;
861
862 hci_req_lock(hdev);
863
864 if (!test_bit(HCI_UP, &hdev->flags))
865 goto done;
866
867 /* Drop queues */
868 skb_queue_purge(&hdev->rx_q);
869 skb_queue_purge(&hdev->cmd_q);
870
871 hci_dev_lock(hdev);
872 inquiry_cache_flush(hdev);
873 hci_conn_hash_flush(hdev);
874 hci_dev_unlock(hdev);
875
876 if (hdev->flush)
877 hdev->flush(hdev);
878
879 atomic_set(&hdev->cmd_cnt, 1);
880 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
881
882 if (!test_bit(HCI_RAW, &hdev->flags))
883 ret = __hci_request(hdev, hci_reset_req, 0,
884 msecs_to_jiffies(HCI_INIT_TIMEOUT));
885
886done:
887 hci_req_unlock(hdev);
888 hci_dev_put(hdev);
889 return ret;
890}
891
892int hci_dev_reset_stat(__u16 dev)
893{
894 struct hci_dev *hdev;
895 int ret = 0;
896
897 hdev = hci_dev_get(dev);
898 if (!hdev)
899 return -ENODEV;
900
901 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
902
903 hci_dev_put(hdev);
904
905 return ret;
906}
907
908int hci_dev_cmd(unsigned int cmd, void __user *arg)
909{
910 struct hci_dev *hdev;
911 struct hci_dev_req dr;
912 int err = 0;
913
914 if (copy_from_user(&dr, arg, sizeof(dr)))
915 return -EFAULT;
916
917 hdev = hci_dev_get(dr.dev_id);
918 if (!hdev)
919 return -ENODEV;
920
921 switch (cmd) {
922 case HCISETAUTH:
923 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
924 msecs_to_jiffies(HCI_INIT_TIMEOUT));
925 break;
926
927 case HCISETENCRYPT:
928 if (!lmp_encrypt_capable(hdev)) {
929 err = -EOPNOTSUPP;
930 break;
931 }
932
933 if (!test_bit(HCI_AUTH, &hdev->flags)) {
934 /* Auth must be enabled first */
935 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
936 msecs_to_jiffies(HCI_INIT_TIMEOUT));
937 if (err)
938 break;
939 }
940
941 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
942 msecs_to_jiffies(HCI_INIT_TIMEOUT));
943 break;
944
945 case HCISETSCAN:
946 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
947 msecs_to_jiffies(HCI_INIT_TIMEOUT));
948 break;
949
950 case HCISETLINKPOL:
951 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
952 msecs_to_jiffies(HCI_INIT_TIMEOUT));
953 break;
954
955 case HCISETLINKMODE:
956 hdev->link_mode = ((__u16) dr.dev_opt) &
957 (HCI_LM_MASTER | HCI_LM_ACCEPT);
958 break;
959
960 case HCISETPTYPE:
961 hdev->pkt_type = (__u16) dr.dev_opt;
962 break;
963
964 case HCISETACLMTU:
965 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
966 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
967 break;
968
969 case HCISETSCOMTU:
970 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
971 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
972 break;
973
974 default:
975 err = -EINVAL;
976 break;
977 }
978
979 hci_dev_put(hdev);
980 return err;
981}
982
983int hci_get_dev_list(void __user *arg)
984{
985 struct hci_dev *hdev;
986 struct hci_dev_list_req *dl;
987 struct hci_dev_req *dr;
988 int n = 0, size, err;
989 __u16 dev_num;
990
991 if (get_user(dev_num, (__u16 __user *) arg))
992 return -EFAULT;
993
994 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
995 return -EINVAL;
996
997 size = sizeof(*dl) + dev_num * sizeof(*dr);
998
999 dl = kzalloc(size, GFP_KERNEL);
1000 if (!dl)
1001 return -ENOMEM;
1002
1003 dr = dl->dev_req;
1004
1005 read_lock(&hci_dev_list_lock);
1006 list_for_each_entry(hdev, &hci_dev_list, list) {
1007 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1008 cancel_delayed_work(&hdev->power_off);
1009
1010 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1011 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1012
1013 (dr + n)->dev_id = hdev->id;
1014 (dr + n)->dev_opt = hdev->flags;
1015
1016 if (++n >= dev_num)
1017 break;
1018 }
1019 read_unlock(&hci_dev_list_lock);
1020
1021 dl->dev_num = n;
1022 size = sizeof(*dl) + n * sizeof(*dr);
1023
1024 err = copy_to_user(arg, dl, size);
1025 kfree(dl);
1026
1027 return err ? -EFAULT : 0;
1028}
1029
1030int hci_get_dev_info(void __user *arg)
1031{
1032 struct hci_dev *hdev;
1033 struct hci_dev_info di;
1034 int err = 0;
1035
1036 if (copy_from_user(&di, arg, sizeof(di)))
1037 return -EFAULT;
1038
1039 hdev = hci_dev_get(di.dev_id);
1040 if (!hdev)
1041 return -ENODEV;
1042
1043 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1044 cancel_delayed_work_sync(&hdev->power_off);
1045
1046 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1047 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1048
1049 strcpy(di.name, hdev->name);
1050 di.bdaddr = hdev->bdaddr;
1051 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1052 di.flags = hdev->flags;
1053 di.pkt_type = hdev->pkt_type;
1054 di.acl_mtu = hdev->acl_mtu;
1055 di.acl_pkts = hdev->acl_pkts;
1056 di.sco_mtu = hdev->sco_mtu;
1057 di.sco_pkts = hdev->sco_pkts;
1058 di.link_policy = hdev->link_policy;
1059 di.link_mode = hdev->link_mode;
1060
1061 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1062 memcpy(&di.features, &hdev->features, sizeof(di.features));
1063
1064 if (copy_to_user(arg, &di, sizeof(di)))
1065 err = -EFAULT;
1066
1067 hci_dev_put(hdev);
1068
1069 return err;
1070}
1071
1072/* ---- Interface to HCI drivers ---- */
1073
1074static int hci_rfkill_set_block(void *data, bool blocked)
1075{
1076 struct hci_dev *hdev = data;
1077
1078 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1079
1080 if (!blocked)
1081 return 0;
1082
1083 hci_dev_do_close(hdev);
1084
1085 return 0;
1086}
1087
1088static const struct rfkill_ops hci_rfkill_ops = {
1089 .set_block = hci_rfkill_set_block,
1090};
1091
1092/* Alloc HCI device */
1093struct hci_dev *hci_alloc_dev(void)
1094{
1095 struct hci_dev *hdev;
1096
1097 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1098 if (!hdev)
1099 return NULL;
1100
1101 hci_init_sysfs(hdev);
1102 skb_queue_head_init(&hdev->driver_init);
1103
1104 return hdev;
1105}
1106EXPORT_SYMBOL(hci_alloc_dev);
1107
1108/* Free HCI device */
1109void hci_free_dev(struct hci_dev *hdev)
1110{
1111 skb_queue_purge(&hdev->driver_init);
1112
1113 /* will free via device release */
1114 put_device(&hdev->dev);
1115}
1116EXPORT_SYMBOL(hci_free_dev);
1117
1118static void hci_power_on(struct work_struct *work)
1119{
1120 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1121
1122 BT_DBG("%s", hdev->name);
1123
1124 if (hci_dev_open(hdev->id) < 0)
1125 return;
1126
1127 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1128 schedule_delayed_work(&hdev->power_off,
1129 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
1130
1131 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1132 mgmt_index_added(hdev);
1133}
1134
1135static void hci_power_off(struct work_struct *work)
1136{
1137 struct hci_dev *hdev = container_of(work, struct hci_dev,
1138 power_off.work);
1139
1140 BT_DBG("%s", hdev->name);
1141
1142 hci_dev_do_close(hdev);
1143}
1144
1145static void hci_discov_off(struct work_struct *work)
1146{
1147 struct hci_dev *hdev;
1148 u8 scan = SCAN_PAGE;
1149
1150 hdev = container_of(work, struct hci_dev, discov_off.work);
1151
1152 BT_DBG("%s", hdev->name);
1153
1154 hci_dev_lock(hdev);
1155
1156 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1157
1158 hdev->discov_timeout = 0;
1159
1160 hci_dev_unlock(hdev);
1161}
1162
1163int hci_uuids_clear(struct hci_dev *hdev)
1164{
1165 struct list_head *p, *n;
1166
1167 list_for_each_safe(p, n, &hdev->uuids) {
1168 struct bt_uuid *uuid;
1169
1170 uuid = list_entry(p, struct bt_uuid, list);
1171
1172 list_del(p);
1173 kfree(uuid);
1174 }
1175
1176 return 0;
1177}
1178
1179int hci_link_keys_clear(struct hci_dev *hdev)
1180{
1181 struct list_head *p, *n;
1182
1183 list_for_each_safe(p, n, &hdev->link_keys) {
1184 struct link_key *key;
1185
1186 key = list_entry(p, struct link_key, list);
1187
1188 list_del(p);
1189 kfree(key);
1190 }
1191
1192 return 0;
1193}
1194
1195int hci_smp_ltks_clear(struct hci_dev *hdev)
1196{
1197 struct smp_ltk *k, *tmp;
1198
1199 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1200 list_del(&k->list);
1201 kfree(k);
1202 }
1203
1204 return 0;
1205}
1206
1207struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1208{
1209 struct link_key *k;
1210
1211 list_for_each_entry(k, &hdev->link_keys, list)
1212 if (bacmp(bdaddr, &k->bdaddr) == 0)
1213 return k;
1214
1215 return NULL;
1216}
1217
1218static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1219 u8 key_type, u8 old_key_type)
1220{
1221 /* Legacy key */
1222 if (key_type < 0x03)
1223 return true;
1224
1225 /* Debug keys are insecure so don't store them persistently */
1226 if (key_type == HCI_LK_DEBUG_COMBINATION)
1227 return false;
1228
1229 /* Changed combination key and there's no previous one */
1230 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1231 return false;
1232
1233 /* Security mode 3 case */
1234 if (!conn)
1235 return true;
1236
1237 /* Neither local nor remote side had no-bonding as requirement */
1238 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1239 return true;
1240
1241 /* Local side had dedicated bonding as requirement */
1242 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1243 return true;
1244
1245 /* Remote side had dedicated bonding as requirement */
1246 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1247 return true;
1248
1249 /* If none of the above criteria match, then don't store the key
1250 * persistently */
1251 return false;
1252}
1253
1254struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1255{
1256 struct smp_ltk *k;
1257
1258 list_for_each_entry(k, &hdev->long_term_keys, list) {
1259 if (k->ediv != ediv ||
1260 memcmp(rand, k->rand, sizeof(k->rand)))
1261 continue;
1262
1263 return k;
1264 }
1265
1266 return NULL;
1267}
1268EXPORT_SYMBOL(hci_find_ltk);
1269
1270struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1271 u8 addr_type)
1272{
1273 struct smp_ltk *k;
1274
1275 list_for_each_entry(k, &hdev->long_term_keys, list)
1276 if (addr_type == k->bdaddr_type &&
1277 bacmp(bdaddr, &k->bdaddr) == 0)
1278 return k;
1279
1280 return NULL;
1281}
1282EXPORT_SYMBOL(hci_find_ltk_by_addr);
1283
1284int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1285 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1286{
1287 struct link_key *key, *old_key;
1288 u8 old_key_type;
1289 bool persistent;
1290
1291 old_key = hci_find_link_key(hdev, bdaddr);
1292 if (old_key) {
1293 old_key_type = old_key->type;
1294 key = old_key;
1295 } else {
1296 old_key_type = conn ? conn->key_type : 0xff;
1297 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1298 if (!key)
1299 return -ENOMEM;
1300 list_add(&key->list, &hdev->link_keys);
1301 }
1302
1303 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1304
1305 /* Some buggy controller combinations generate a changed
1306 * combination key for legacy pairing even when there's no
1307 * previous key */
1308 if (type == HCI_LK_CHANGED_COMBINATION &&
1309 (!conn || conn->remote_auth == 0xff) &&
1310 old_key_type == 0xff) {
1311 type = HCI_LK_COMBINATION;
1312 if (conn)
1313 conn->key_type = type;
1314 }
1315
1316 bacpy(&key->bdaddr, bdaddr);
1317 memcpy(key->val, val, 16);
1318 key->pin_len = pin_len;
1319
1320 if (type == HCI_LK_CHANGED_COMBINATION)
1321 key->type = old_key_type;
1322 else
1323 key->type = type;
1324
1325 if (!new_key)
1326 return 0;
1327
1328 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1329
1330 mgmt_new_link_key(hdev, key, persistent);
1331
1332 if (conn)
1333 conn->flush_key = !persistent;
1334
1335 return 0;
1336}
1337
1338int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1339 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, u16
1340 ediv, u8 rand[8])
1341{
1342 struct smp_ltk *key, *old_key;
1343
1344 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1345 return 0;
1346
1347 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1348 if (old_key)
1349 key = old_key;
1350 else {
1351 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1352 if (!key)
1353 return -ENOMEM;
1354 list_add(&key->list, &hdev->long_term_keys);
1355 }
1356
1357 bacpy(&key->bdaddr, bdaddr);
1358 key->bdaddr_type = addr_type;
1359 memcpy(key->val, tk, sizeof(key->val));
1360 key->authenticated = authenticated;
1361 key->ediv = ediv;
1362 key->enc_size = enc_size;
1363 key->type = type;
1364 memcpy(key->rand, rand, sizeof(key->rand));
1365
1366 if (!new_key)
1367 return 0;
1368
1369 if (type & HCI_SMP_LTK)
1370 mgmt_new_ltk(hdev, key, 1);
1371
1372 return 0;
1373}
1374
1375int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1376{
1377 struct link_key *key;
1378
1379 key = hci_find_link_key(hdev, bdaddr);
1380 if (!key)
1381 return -ENOENT;
1382
1383 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1384
1385 list_del(&key->list);
1386 kfree(key);
1387
1388 return 0;
1389}
1390
1391int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1392{
1393 struct smp_ltk *k, *tmp;
1394
1395 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1396 if (bacmp(bdaddr, &k->bdaddr))
1397 continue;
1398
1399 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1400
1401 list_del(&k->list);
1402 kfree(k);
1403 }
1404
1405 return 0;
1406}
1407
1408/* HCI command timer function */
1409static void hci_cmd_timer(unsigned long arg)
1410{
1411 struct hci_dev *hdev = (void *) arg;
1412
1413 BT_ERR("%s command tx timeout", hdev->name);
1414 atomic_set(&hdev->cmd_cnt, 1);
1415 queue_work(hdev->workqueue, &hdev->cmd_work);
1416}
1417
1418struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1419 bdaddr_t *bdaddr)
1420{
1421 struct oob_data *data;
1422
1423 list_for_each_entry(data, &hdev->remote_oob_data, list)
1424 if (bacmp(bdaddr, &data->bdaddr) == 0)
1425 return data;
1426
1427 return NULL;
1428}
1429
1430int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1431{
1432 struct oob_data *data;
1433
1434 data = hci_find_remote_oob_data(hdev, bdaddr);
1435 if (!data)
1436 return -ENOENT;
1437
1438 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1439
1440 list_del(&data->list);
1441 kfree(data);
1442
1443 return 0;
1444}
1445
1446int hci_remote_oob_data_clear(struct hci_dev *hdev)
1447{
1448 struct oob_data *data, *n;
1449
1450 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1451 list_del(&data->list);
1452 kfree(data);
1453 }
1454
1455 return 0;
1456}
1457
1458int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1459 u8 *randomizer)
1460{
1461 struct oob_data *data;
1462
1463 data = hci_find_remote_oob_data(hdev, bdaddr);
1464
1465 if (!data) {
1466 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1467 if (!data)
1468 return -ENOMEM;
1469
1470 bacpy(&data->bdaddr, bdaddr);
1471 list_add(&data->list, &hdev->remote_oob_data);
1472 }
1473
1474 memcpy(data->hash, hash, sizeof(data->hash));
1475 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1476
1477 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1478
1479 return 0;
1480}
1481
1482struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1483{
1484 struct bdaddr_list *b;
1485
1486 list_for_each_entry(b, &hdev->blacklist, list)
1487 if (bacmp(bdaddr, &b->bdaddr) == 0)
1488 return b;
1489
1490 return NULL;
1491}
1492
1493int hci_blacklist_clear(struct hci_dev *hdev)
1494{
1495 struct list_head *p, *n;
1496
1497 list_for_each_safe(p, n, &hdev->blacklist) {
1498 struct bdaddr_list *b;
1499
1500 b = list_entry(p, struct bdaddr_list, list);
1501
1502 list_del(p);
1503 kfree(b);
1504 }
1505
1506 return 0;
1507}
1508
1509int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1510{
1511 struct bdaddr_list *entry;
1512
1513 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1514 return -EBADF;
1515
1516 if (hci_blacklist_lookup(hdev, bdaddr))
1517 return -EEXIST;
1518
1519 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1520 if (!entry)
1521 return -ENOMEM;
1522
1523 bacpy(&entry->bdaddr, bdaddr);
1524
1525 list_add(&entry->list, &hdev->blacklist);
1526
1527 return mgmt_device_blocked(hdev, bdaddr, type);
1528}
1529
1530int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1531{
1532 struct bdaddr_list *entry;
1533
1534 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1535 return hci_blacklist_clear(hdev);
1536
1537 entry = hci_blacklist_lookup(hdev, bdaddr);
1538 if (!entry)
1539 return -ENOENT;
1540
1541 list_del(&entry->list);
1542 kfree(entry);
1543
1544 return mgmt_device_unblocked(hdev, bdaddr, type);
1545}
1546
1547static void hci_clear_adv_cache(struct work_struct *work)
1548{
1549 struct hci_dev *hdev = container_of(work, struct hci_dev,
1550 adv_work.work);
1551
1552 hci_dev_lock(hdev);
1553
1554 hci_adv_entries_clear(hdev);
1555
1556 hci_dev_unlock(hdev);
1557}
1558
1559int hci_adv_entries_clear(struct hci_dev *hdev)
1560{
1561 struct adv_entry *entry, *tmp;
1562
1563 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1564 list_del(&entry->list);
1565 kfree(entry);
1566 }
1567
1568 BT_DBG("%s adv cache cleared", hdev->name);
1569
1570 return 0;
1571}
1572
1573struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1574{
1575 struct adv_entry *entry;
1576
1577 list_for_each_entry(entry, &hdev->adv_entries, list)
1578 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1579 return entry;
1580
1581 return NULL;
1582}
1583
1584static inline int is_connectable_adv(u8 evt_type)
1585{
1586 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1587 return 1;
1588
1589 return 0;
1590}
1591
1592int hci_add_adv_entry(struct hci_dev *hdev,
1593 struct hci_ev_le_advertising_info *ev) { struct adv_entry *entry; if (!is_connectable_adv(ev->evt_type))
1594 return -EINVAL;
1595
1596 /* Only new entries should be added to adv_entries. So, if
1597 * bdaddr was found, don't add it. */
1598 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1599 return 0;
1600
1601 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1602 if (!entry)
1603 return -ENOMEM;
1604
1605 bacpy(&entry->bdaddr, &ev->bdaddr);
1606 entry->bdaddr_type = ev->bdaddr_type;
1607
1608 list_add(&entry->list, &hdev->adv_entries);
1609
1610 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1611 batostr(&entry->bdaddr), entry->bdaddr_type);
1612
1613 return 0;
1614}
1615
1616static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1617{
1618 struct le_scan_params *param = (struct le_scan_params *) opt;
1619 struct hci_cp_le_set_scan_param cp;
1620
1621 memset(&cp, 0, sizeof(cp));
1622 cp.type = param->type;
1623 cp.interval = cpu_to_le16(param->interval);
1624 cp.window = cpu_to_le16(param->window);
1625
1626 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1627}
1628
1629static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1630{
1631 struct hci_cp_le_set_scan_enable cp;
1632
1633 memset(&cp, 0, sizeof(cp));
1634 cp.enable = 1;
1635
1636 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1637}
1638
1639static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1640 u16 window, int timeout)
1641{
1642 long timeo = msecs_to_jiffies(3000);
1643 struct le_scan_params param;
1644 int err;
1645
1646 BT_DBG("%s", hdev->name);
1647
1648 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1649 return -EINPROGRESS;
1650
1651 param.type = type;
1652 param.interval = interval;
1653 param.window = window;
1654
1655 hci_req_lock(hdev);
1656
1657 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
1658 timeo);
1659 if (!err)
1660 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1661
1662 hci_req_unlock(hdev);
1663
1664 if (err < 0)
1665 return err;
1666
1667 schedule_delayed_work(&hdev->le_scan_disable,
1668 msecs_to_jiffies(timeout));
1669
1670 return 0;
1671}
1672
1673static void le_scan_disable_work(struct work_struct *work)
1674{
1675 struct hci_dev *hdev = container_of(work, struct hci_dev,
1676 le_scan_disable.work);
1677 struct hci_cp_le_set_scan_enable cp;
1678
1679 BT_DBG("%s", hdev->name);
1680
1681 memset(&cp, 0, sizeof(cp));
1682
1683 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1684}
1685
1686static void le_scan_work(struct work_struct *work)
1687{
1688 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1689 struct le_scan_params *param = &hdev->le_scan_params;
1690
1691 BT_DBG("%s", hdev->name);
1692
1693 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1694 param->timeout);
1695}
1696
1697int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1698 int timeout)
1699{
1700 struct le_scan_params *param = &hdev->le_scan_params;
1701
1702 BT_DBG("%s", hdev->name);
1703
1704 if (work_busy(&hdev->le_scan))
1705 return -EINPROGRESS;
1706
1707 param->type = type;
1708 param->interval = interval;
1709 param->window = window;
1710 param->timeout = timeout;
1711
1712 queue_work(system_long_wq, &hdev->le_scan);
1713
1714 return 0;
1715}
1716
1717/* Register HCI device */
1718int hci_register_dev(struct hci_dev *hdev)
1719{
1720 struct list_head *head = &hci_dev_list, *p;
1721 int i, id, error;
1722
1723 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1724
1725 if (!hdev->open || !hdev->close)
1726 return -EINVAL;
1727
1728 /* Do not allow HCI_AMP devices to register at index 0,
1729 * so the index can be used as the AMP controller ID.
1730 */
1731 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
1732
1733 write_lock(&hci_dev_list_lock);
1734
1735 /* Find first available device id */
1736 list_for_each(p, &hci_dev_list) {
1737 if (list_entry(p, struct hci_dev, list)->id != id)
1738 break;
1739 head = p; id++;
1740 }
1741
1742 sprintf(hdev->name, "hci%d", id);
1743 hdev->id = id;
1744 list_add_tail(&hdev->list, head);
1745
1746 mutex_init(&hdev->lock);
1747
1748 hdev->flags = 0;
1749 hdev->dev_flags = 0;
1750 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1751 hdev->esco_type = (ESCO_HV1);
1752 hdev->link_mode = (HCI_LM_ACCEPT);
1753 hdev->io_capability = 0x03; /* No Input No Output */
1754
1755 hdev->idle_timeout = 0;
1756 hdev->sniff_max_interval = 800;
1757 hdev->sniff_min_interval = 80;
1758
1759 INIT_WORK(&hdev->rx_work, hci_rx_work);
1760 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1761 INIT_WORK(&hdev->tx_work, hci_tx_work);
1762
1763
1764 skb_queue_head_init(&hdev->rx_q);
1765 skb_queue_head_init(&hdev->cmd_q);
1766 skb_queue_head_init(&hdev->raw_q);
1767
1768 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1769
1770 for (i = 0; i < NUM_REASSEMBLY; i++)
1771 hdev->reassembly[i] = NULL;
1772
1773 init_waitqueue_head(&hdev->req_wait_q);
1774 mutex_init(&hdev->req_lock);
1775
1776 discovery_init(hdev);
1777
1778 hci_conn_hash_init(hdev);
1779
1780 INIT_LIST_HEAD(&hdev->mgmt_pending);
1781
1782 INIT_LIST_HEAD(&hdev->blacklist);
1783
1784 INIT_LIST_HEAD(&hdev->uuids);
1785
1786 INIT_LIST_HEAD(&hdev->link_keys);
1787 INIT_LIST_HEAD(&hdev->long_term_keys);
1788
1789 INIT_LIST_HEAD(&hdev->remote_oob_data);
1790
1791 INIT_LIST_HEAD(&hdev->adv_entries);
1792
1793 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
1794 INIT_WORK(&hdev->power_on, hci_power_on);
1795 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1796
1797 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1798
1799 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1800
1801 atomic_set(&hdev->promisc, 0);
1802
1803 INIT_WORK(&hdev->le_scan, le_scan_work);
1804
1805 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1806
1807 write_unlock(&hci_dev_list_lock);
1808
1809 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1810 WQ_MEM_RECLAIM, 1);
1811 if (!hdev->workqueue) {
1812 error = -ENOMEM;
1813 goto err;
1814 }
1815
1816 error = hci_add_sysfs(hdev);
1817 if (error < 0)
1818 goto err_wqueue;
1819
1820 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1821 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1822 if (hdev->rfkill) {
1823 if (rfkill_register(hdev->rfkill) < 0) {
1824 rfkill_destroy(hdev->rfkill);
1825 hdev->rfkill = NULL;
1826 }
1827 }
1828
1829 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1830 set_bit(HCI_SETUP, &hdev->dev_flags);
1831 schedule_work(&hdev->power_on);
1832
1833 hci_notify(hdev, HCI_DEV_REG);
1834 hci_dev_hold(hdev);
1835
1836 return id;
1837
1838err_wqueue:
1839 destroy_workqueue(hdev->workqueue);
1840err:
1841 write_lock(&hci_dev_list_lock);
1842 list_del(&hdev->list);
1843 write_unlock(&hci_dev_list_lock);
1844
1845 return error;
1846}
1847EXPORT_SYMBOL(hci_register_dev);
1848
1849/* Unregister HCI device */
1850void hci_unregister_dev(struct hci_dev *hdev)
1851{
1852 int i;
1853
1854 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1855
1856 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1857
1858 write_lock(&hci_dev_list_lock);
1859 list_del(&hdev->list);
1860 write_unlock(&hci_dev_list_lock);
1861
1862 hci_dev_do_close(hdev);
1863
1864 for (i = 0; i < NUM_REASSEMBLY; i++)
1865 kfree_skb(hdev->reassembly[i]);
1866
1867 if (!test_bit(HCI_INIT, &hdev->flags) &&
1868 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1869 hci_dev_lock(hdev);
1870 mgmt_index_removed(hdev);
1871 hci_dev_unlock(hdev);
1872 }
1873
1874 /* mgmt_index_removed should take care of emptying the
1875 * pending list */
1876 BUG_ON(!list_empty(&hdev->mgmt_pending));
1877
1878 hci_notify(hdev, HCI_DEV_UNREG);
1879
1880 if (hdev->rfkill) {
1881 rfkill_unregister(hdev->rfkill);
1882 rfkill_destroy(hdev->rfkill);
1883 }
1884
1885 hci_del_sysfs(hdev);
1886
1887 cancel_delayed_work_sync(&hdev->adv_work);
1888
1889 destroy_workqueue(hdev->workqueue);
1890
1891 hci_dev_lock(hdev);
1892 hci_blacklist_clear(hdev);
1893 hci_uuids_clear(hdev);
1894 hci_link_keys_clear(hdev);
1895 hci_smp_ltks_clear(hdev);
1896 hci_remote_oob_data_clear(hdev);
1897 hci_adv_entries_clear(hdev);
1898 hci_dev_unlock(hdev);
1899
1900 hci_dev_put(hdev);
1901}
1902EXPORT_SYMBOL(hci_unregister_dev);
1903
1904/* Suspend HCI device */
1905int hci_suspend_dev(struct hci_dev *hdev)
1906{
1907 hci_notify(hdev, HCI_DEV_SUSPEND);
1908 return 0;
1909}
1910EXPORT_SYMBOL(hci_suspend_dev);
1911
1912/* Resume HCI device */
1913int hci_resume_dev(struct hci_dev *hdev)
1914{
1915 hci_notify(hdev, HCI_DEV_RESUME);
1916 return 0;
1917}
1918EXPORT_SYMBOL(hci_resume_dev);
1919
1920/* Receive frame from HCI drivers */
1921int hci_recv_frame(struct sk_buff *skb)
1922{
1923 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1924 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1925 && !test_bit(HCI_INIT, &hdev->flags))) {
1926 kfree_skb(skb);
1927 return -ENXIO;
1928 }
1929
1930 /* Incomming skb */
1931 bt_cb(skb)->incoming = 1;
1932
1933 /* Time stamp */
1934 __net_timestamp(skb);
1935
1936 skb_queue_tail(&hdev->rx_q, skb);
1937 queue_work(hdev->workqueue, &hdev->rx_work);
1938
1939 return 0;
1940}
1941EXPORT_SYMBOL(hci_recv_frame);
1942
1943static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1944 int count, __u8 index)
1945{
1946 int len = 0;
1947 int hlen = 0;
1948 int remain = count;
1949 struct sk_buff *skb;
1950 struct bt_skb_cb *scb;
1951
1952 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1953 index >= NUM_REASSEMBLY)
1954 return -EILSEQ;
1955
1956 skb = hdev->reassembly[index];
1957
1958 if (!skb) {
1959 switch (type) {
1960 case HCI_ACLDATA_PKT:
1961 len = HCI_MAX_FRAME_SIZE;
1962 hlen = HCI_ACL_HDR_SIZE;
1963 break;
1964 case HCI_EVENT_PKT:
1965 len = HCI_MAX_EVENT_SIZE;
1966 hlen = HCI_EVENT_HDR_SIZE;
1967 break;
1968 case HCI_SCODATA_PKT:
1969 len = HCI_MAX_SCO_SIZE;
1970 hlen = HCI_SCO_HDR_SIZE;
1971 break;
1972 }
1973
1974 skb = bt_skb_alloc(len, GFP_ATOMIC);
1975 if (!skb)
1976 return -ENOMEM;
1977
1978 scb = (void *) skb->cb;
1979 scb->expect = hlen;
1980 scb->pkt_type = type;
1981
1982 skb->dev = (void *) hdev;
1983 hdev->reassembly[index] = skb;
1984 }
1985
1986 while (count) {
1987 scb = (void *) skb->cb;
1988 len = min_t(uint, scb->expect, count);
1989
1990 memcpy(skb_put(skb, len), data, len);
1991
1992 count -= len;
1993 data += len;
1994 scb->expect -= len;
1995 remain = count;
1996
1997 switch (type) {
1998 case HCI_EVENT_PKT:
1999 if (skb->len == HCI_EVENT_HDR_SIZE) {
2000 struct hci_event_hdr *h = hci_event_hdr(skb);
2001 scb->expect = h->plen;
2002
2003 if (skb_tailroom(skb) < scb->expect) {
2004 kfree_skb(skb);
2005 hdev->reassembly[index] = NULL;
2006 return -ENOMEM;
2007 }
2008 }
2009 break;
2010
2011 case HCI_ACLDATA_PKT:
2012 if (skb->len == HCI_ACL_HDR_SIZE) {
2013 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2014 scb->expect = __le16_to_cpu(h->dlen);
2015
2016 if (skb_tailroom(skb) < scb->expect) {
2017 kfree_skb(skb);
2018 hdev->reassembly[index] = NULL;
2019 return -ENOMEM;
2020 }
2021 }
2022 break;
2023
2024 case HCI_SCODATA_PKT:
2025 if (skb->len == HCI_SCO_HDR_SIZE) {
2026 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2027 scb->expect = h->dlen;
2028
2029 if (skb_tailroom(skb) < scb->expect) {
2030 kfree_skb(skb);
2031 hdev->reassembly[index] = NULL;
2032 return -ENOMEM;
2033 }
2034 }
2035 break;
2036 }
2037
2038 if (scb->expect == 0) {
2039 /* Complete frame */
2040
2041 bt_cb(skb)->pkt_type = type;
2042 hci_recv_frame(skb);
2043
2044 hdev->reassembly[index] = NULL;
2045 return remain;
2046 }
2047 }
2048
2049 return remain;
2050}
2051
2052int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2053{
2054 int rem = 0;
2055
2056 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2057 return -EILSEQ;
2058
2059 while (count) {
2060 rem = hci_reassembly(hdev, type, data, count, type - 1);
2061 if (rem < 0)
2062 return rem;
2063
2064 data += (count - rem);
2065 count = rem;
2066 }
2067
2068 return rem;
2069}
2070EXPORT_SYMBOL(hci_recv_fragment);
2071
2072#define STREAM_REASSEMBLY 0
2073
2074int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2075{
2076 int type;
2077 int rem = 0;
2078
2079 while (count) {
2080 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2081
2082 if (!skb) {
2083 struct { char type; } *pkt;
2084
2085 /* Start of the frame */
2086 pkt = data;
2087 type = pkt->type;
2088
2089 data++;
2090 count--;
2091 } else
2092 type = bt_cb(skb)->pkt_type;
2093
2094 rem = hci_reassembly(hdev, type, data, count,
2095 STREAM_REASSEMBLY);
2096 if (rem < 0)
2097 return rem;
2098
2099 data += (count - rem);
2100 count = rem;
2101 }
2102
2103 return rem;
2104}
2105EXPORT_SYMBOL(hci_recv_stream_fragment);
2106
2107/* ---- Interface to upper protocols ---- */
2108
2109int hci_register_cb(struct hci_cb *cb)
2110{
2111 BT_DBG("%p name %s", cb, cb->name);
2112
2113 write_lock(&hci_cb_list_lock);
2114 list_add(&cb->list, &hci_cb_list);
2115 write_unlock(&hci_cb_list_lock);
2116
2117 return 0;
2118}
2119EXPORT_SYMBOL(hci_register_cb);
2120
2121int hci_unregister_cb(struct hci_cb *cb)
2122{
2123 BT_DBG("%p name %s", cb, cb->name);
2124
2125 write_lock(&hci_cb_list_lock);
2126 list_del(&cb->list);
2127 write_unlock(&hci_cb_list_lock);
2128
2129 return 0;
2130}
2131EXPORT_SYMBOL(hci_unregister_cb);
2132
2133static int hci_send_frame(struct sk_buff *skb)
2134{
2135 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2136
2137 if (!hdev) {
2138 kfree_skb(skb);
2139 return -ENODEV;
2140 }
2141
2142 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2143
2144 /* Time stamp */
2145 __net_timestamp(skb);
2146
2147 /* Send copy to monitor */
2148 hci_send_to_monitor(hdev, skb);
2149
2150 if (atomic_read(&hdev->promisc)) {
2151 /* Send copy to the sockets */
2152 hci_send_to_sock(hdev, skb);
2153 }
2154
2155 /* Get rid of skb owner, prior to sending to the driver. */
2156 skb_orphan(skb);
2157
2158 return hdev->send(skb);
2159}
2160
2161/* Send HCI command */
2162int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2163{
2164 int len = HCI_COMMAND_HDR_SIZE + plen;
2165 struct hci_command_hdr *hdr;
2166 struct sk_buff *skb;
2167
2168 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
2169
2170 skb = bt_skb_alloc(len, GFP_ATOMIC);
2171 if (!skb) {
2172 BT_ERR("%s no memory for command", hdev->name);
2173 return -ENOMEM;
2174 }
2175
2176 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2177 hdr->opcode = cpu_to_le16(opcode);
2178 hdr->plen = plen;
2179
2180 if (plen)
2181 memcpy(skb_put(skb, plen), param, plen);
2182
2183 BT_DBG("skb len %d", skb->len);
2184
2185 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2186 skb->dev = (void *) hdev;
2187
2188 if (test_bit(HCI_INIT, &hdev->flags))
2189 hdev->init_last_cmd = opcode;
2190
2191 skb_queue_tail(&hdev->cmd_q, skb);
2192 queue_work(hdev->workqueue, &hdev->cmd_work);
2193
2194 return 0;
2195}
2196
2197/* Get data from the previously sent command */
2198void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2199{
2200 struct hci_command_hdr *hdr;
2201
2202 if (!hdev->sent_cmd)
2203 return NULL;
2204
2205 hdr = (void *) hdev->sent_cmd->data;
2206
2207 if (hdr->opcode != cpu_to_le16(opcode))
2208 return NULL;
2209
2210 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
2211
2212 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2213}
2214
2215/* Send ACL data */
2216static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2217{
2218 struct hci_acl_hdr *hdr;
2219 int len = skb->len;
2220
2221 skb_push(skb, HCI_ACL_HDR_SIZE);
2222 skb_reset_transport_header(skb);
2223 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2224 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2225 hdr->dlen = cpu_to_le16(len);
2226}
2227
2228static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2229 struct sk_buff *skb, __u16 flags)
2230{
2231 struct hci_dev *hdev = conn->hdev;
2232 struct sk_buff *list;
2233
2234 list = skb_shinfo(skb)->frag_list;
2235 if (!list) {
2236 /* Non fragmented */
2237 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2238
2239 skb_queue_tail(queue, skb);
2240 } else {
2241 /* Fragmented */
2242 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2243
2244 skb_shinfo(skb)->frag_list = NULL;
2245
2246 /* Queue all fragments atomically */
2247 spin_lock(&queue->lock);
2248
2249 __skb_queue_tail(queue, skb);
2250
2251 flags &= ~ACL_START;
2252 flags |= ACL_CONT;
2253 do {
2254 skb = list; list = list->next;
2255
2256 skb->dev = (void *) hdev;
2257 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2258 hci_add_acl_hdr(skb, conn->handle, flags);
2259
2260 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2261
2262 __skb_queue_tail(queue, skb);
2263 } while (list);
2264
2265 spin_unlock(&queue->lock);
2266 }
2267}
2268
2269void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2270{
2271 struct hci_conn *conn = chan->conn;
2272 struct hci_dev *hdev = conn->hdev;
2273
2274 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2275
2276 skb->dev = (void *) hdev;
2277 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2278 hci_add_acl_hdr(skb, conn->handle, flags);
2279
2280 hci_queue_acl(conn, &chan->data_q, skb, flags);
2281
2282 queue_work(hdev->workqueue, &hdev->tx_work);
2283}
2284EXPORT_SYMBOL(hci_send_acl);
2285
2286/* Send SCO data */
2287void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2288{
2289 struct hci_dev *hdev = conn->hdev;
2290 struct hci_sco_hdr hdr;
2291
2292 BT_DBG("%s len %d", hdev->name, skb->len);
2293
2294 hdr.handle = cpu_to_le16(conn->handle);
2295 hdr.dlen = skb->len;
2296
2297 skb_push(skb, HCI_SCO_HDR_SIZE);
2298 skb_reset_transport_header(skb);
2299 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2300
2301 skb->dev = (void *) hdev;
2302 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2303
2304 skb_queue_tail(&conn->data_q, skb);
2305 queue_work(hdev->workqueue, &hdev->tx_work);
2306}
2307EXPORT_SYMBOL(hci_send_sco);
2308
2309/* ---- HCI TX task (outgoing data) ---- */
2310
2311/* HCI Connection scheduler */
2312static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2313{
2314 struct hci_conn_hash *h = &hdev->conn_hash;
2315 struct hci_conn *conn = NULL, *c;
2316 int num = 0, min = ~0;
2317
2318 /* We don't have to lock device here. Connections are always
2319 * added and removed with TX task disabled. */
2320
2321 rcu_read_lock();
2322
2323 list_for_each_entry_rcu(c, &h->list, list) {
2324 if (c->type != type || skb_queue_empty(&c->data_q))
2325 continue;
2326
2327 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2328 continue;
2329
2330 num++;
2331
2332 if (c->sent < min) {
2333 min = c->sent;
2334 conn = c;
2335 }
2336
2337 if (hci_conn_num(hdev, type) == num)
2338 break;
2339 }
2340
2341 rcu_read_unlock();
2342
2343 if (conn) {
2344 int cnt, q;
2345
2346 switch (conn->type) {
2347 case ACL_LINK:
2348 cnt = hdev->acl_cnt;
2349 break;
2350 case SCO_LINK:
2351 case ESCO_LINK:
2352 cnt = hdev->sco_cnt;
2353 break;
2354 case LE_LINK:
2355 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2356 break;
2357 default:
2358 cnt = 0;
2359 BT_ERR("Unknown link type");
2360 }
2361
2362 q = cnt / num;
2363 *quote = q ? q : 1;
2364 } else
2365 *quote = 0;
2366
2367 BT_DBG("conn %p quote %d", conn, *quote);
2368 return conn;
2369}
2370
2371static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2372{
2373 struct hci_conn_hash *h = &hdev->conn_hash;
2374 struct hci_conn *c;
2375
2376 BT_ERR("%s link tx timeout", hdev->name);
2377
2378 rcu_read_lock();
2379
2380 /* Kill stalled connections */
2381 list_for_each_entry_rcu(c, &h->list, list) {
2382 if (c->type == type && c->sent) {
2383 BT_ERR("%s killing stalled connection %s",
2384 hdev->name, batostr(&c->dst));
2385 hci_acl_disconn(c, 0x13);
2386 }
2387 }
2388
2389 rcu_read_unlock();
2390}
2391
2392static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2393 int *quote)
2394{
2395 struct hci_conn_hash *h = &hdev->conn_hash;
2396 struct hci_chan *chan = NULL;
2397 int num = 0, min = ~0, cur_prio = 0;
2398 struct hci_conn *conn;
2399 int cnt, q, conn_num = 0;
2400
2401 BT_DBG("%s", hdev->name);
2402
2403 rcu_read_lock();
2404
2405 list_for_each_entry_rcu(conn, &h->list, list) {
2406 struct hci_chan *tmp;
2407
2408 if (conn->type != type)
2409 continue;
2410
2411 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2412 continue;
2413
2414 conn_num++;
2415
2416 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2417 struct sk_buff *skb;
2418
2419 if (skb_queue_empty(&tmp->data_q))
2420 continue;
2421
2422 skb = skb_peek(&tmp->data_q);
2423 if (skb->priority < cur_prio)
2424 continue;
2425
2426 if (skb->priority > cur_prio) {
2427 num = 0;
2428 min = ~0;
2429 cur_prio = skb->priority;
2430 }
2431
2432 num++;
2433
2434 if (conn->sent < min) {
2435 min = conn->sent;
2436 chan = tmp;
2437 }
2438 }
2439
2440 if (hci_conn_num(hdev, type) == conn_num)
2441 break;
2442 }
2443
2444 rcu_read_unlock();
2445
2446 if (!chan)
2447 return NULL;
2448
2449 switch (chan->conn->type) {
2450 case ACL_LINK:
2451 cnt = hdev->acl_cnt;
2452 break;
2453 case SCO_LINK:
2454 case ESCO_LINK:
2455 cnt = hdev->sco_cnt;
2456 break;
2457 case LE_LINK:
2458 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2459 break;
2460 default:
2461 cnt = 0;
2462 BT_ERR("Unknown link type");
2463 }
2464
2465 q = cnt / num;
2466 *quote = q ? q : 1;
2467 BT_DBG("chan %p quote %d", chan, *quote);
2468 return chan;
2469}
2470
2471static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2472{
2473 struct hci_conn_hash *h = &hdev->conn_hash;
2474 struct hci_conn *conn;
2475 int num = 0;
2476
2477 BT_DBG("%s", hdev->name);
2478
2479 rcu_read_lock();
2480
2481 list_for_each_entry_rcu(conn, &h->list, list) {
2482 struct hci_chan *chan;
2483
2484 if (conn->type != type)
2485 continue;
2486
2487 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2488 continue;
2489
2490 num++;
2491
2492 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
2493 struct sk_buff *skb;
2494
2495 if (chan->sent) {
2496 chan->sent = 0;
2497 continue;
2498 }
2499
2500 if (skb_queue_empty(&chan->data_q))
2501 continue;
2502
2503 skb = skb_peek(&chan->data_q);
2504 if (skb->priority >= HCI_PRIO_MAX - 1)
2505 continue;
2506
2507 skb->priority = HCI_PRIO_MAX - 1;
2508
2509 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2510 skb->priority);
2511 }
2512
2513 if (hci_conn_num(hdev, type) == num)
2514 break;
2515 }
2516
2517 rcu_read_unlock();
2518
2519}
2520
2521static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2522{
2523 /* Calculate count of blocks used by this packet */
2524 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2525}
2526
2527static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
2528{
2529 if (!test_bit(HCI_RAW, &hdev->flags)) {
2530 /* ACL tx timeout must be longer than maximum
2531 * link supervision timeout (40.9 seconds) */
2532 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
2533 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
2534 hci_link_tx_to(hdev, ACL_LINK);
2535 }
2536}
2537
2538static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2539{
2540 unsigned int cnt = hdev->acl_cnt;
2541 struct hci_chan *chan;
2542 struct sk_buff *skb;
2543 int quote;
2544
2545 __check_timeout(hdev, cnt);
2546
2547 while (hdev->acl_cnt &&
2548 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2549 u32 priority = (skb_peek(&chan->data_q))->priority;
2550 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2551 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2552 skb->len, skb->priority);
2553
2554 /* Stop if priority has changed */
2555 if (skb->priority < priority)
2556 break;
2557
2558 skb = skb_dequeue(&chan->data_q);
2559
2560 hci_conn_enter_active_mode(chan->conn,
2561 bt_cb(skb)->force_active);
2562
2563 hci_send_frame(skb);
2564 hdev->acl_last_tx = jiffies;
2565
2566 hdev->acl_cnt--;
2567 chan->sent++;
2568 chan->conn->sent++;
2569 }
2570 }
2571
2572 if (cnt != hdev->acl_cnt)
2573 hci_prio_recalculate(hdev, ACL_LINK);
2574}
2575
2576static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2577{
2578 unsigned int cnt = hdev->block_cnt;
2579 struct hci_chan *chan;
2580 struct sk_buff *skb;
2581 int quote;
2582
2583 __check_timeout(hdev, cnt);
2584
2585 while (hdev->block_cnt > 0 &&
2586 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2587 u32 priority = (skb_peek(&chan->data_q))->priority;
2588 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2589 int blocks;
2590
2591 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2592 skb->len, skb->priority);
2593
2594 /* Stop if priority has changed */
2595 if (skb->priority < priority)
2596 break;
2597
2598 skb = skb_dequeue(&chan->data_q);
2599
2600 blocks = __get_blocks(hdev, skb);
2601 if (blocks > hdev->block_cnt)
2602 return;
2603
2604 hci_conn_enter_active_mode(chan->conn,
2605 bt_cb(skb)->force_active);
2606
2607 hci_send_frame(skb);
2608 hdev->acl_last_tx = jiffies;
2609
2610 hdev->block_cnt -= blocks;
2611 quote -= blocks;
2612
2613 chan->sent += blocks;
2614 chan->conn->sent += blocks;
2615 }
2616 }
2617
2618 if (cnt != hdev->block_cnt)
2619 hci_prio_recalculate(hdev, ACL_LINK);
2620}
2621
2622static inline void hci_sched_acl(struct hci_dev *hdev)
2623{
2624 BT_DBG("%s", hdev->name);
2625
2626 if (!hci_conn_num(hdev, ACL_LINK))
2627 return;
2628
2629 switch (hdev->flow_ctl_mode) {
2630 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2631 hci_sched_acl_pkt(hdev);
2632 break;
2633
2634 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2635 hci_sched_acl_blk(hdev);
2636 break;
2637 }
2638}
2639
2640/* Schedule SCO */
2641static inline void hci_sched_sco(struct hci_dev *hdev)
2642{
2643 struct hci_conn *conn;
2644 struct sk_buff *skb;
2645 int quote;
2646
2647 BT_DBG("%s", hdev->name);
2648
2649 if (!hci_conn_num(hdev, SCO_LINK))
2650 return;
2651
2652 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2653 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2654 BT_DBG("skb %p len %d", skb, skb->len);
2655 hci_send_frame(skb);
2656
2657 conn->sent++;
2658 if (conn->sent == ~0)
2659 conn->sent = 0;
2660 }
2661 }
2662}
2663
2664static inline void hci_sched_esco(struct hci_dev *hdev)
2665{
2666 struct hci_conn *conn;
2667 struct sk_buff *skb;
2668 int quote;
2669
2670 BT_DBG("%s", hdev->name);
2671
2672 if (!hci_conn_num(hdev, ESCO_LINK))
2673 return;
2674
2675 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2676 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2677 BT_DBG("skb %p len %d", skb, skb->len);
2678 hci_send_frame(skb);
2679
2680 conn->sent++;
2681 if (conn->sent == ~0)
2682 conn->sent = 0;
2683 }
2684 }
2685}
2686
2687static inline void hci_sched_le(struct hci_dev *hdev)
2688{
2689 struct hci_chan *chan;
2690 struct sk_buff *skb;
2691 int quote, cnt, tmp;
2692
2693 BT_DBG("%s", hdev->name);
2694
2695 if (!hci_conn_num(hdev, LE_LINK))
2696 return;
2697
2698 if (!test_bit(HCI_RAW, &hdev->flags)) {
2699 /* LE tx timeout must be longer than maximum
2700 * link supervision timeout (40.9 seconds) */
2701 if (!hdev->le_cnt && hdev->le_pkts &&
2702 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2703 hci_link_tx_to(hdev, LE_LINK);
2704 }
2705
2706 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2707 tmp = cnt;
2708 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
2709 u32 priority = (skb_peek(&chan->data_q))->priority;
2710 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2711 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2712 skb->len, skb->priority);
2713
2714 /* Stop if priority has changed */
2715 if (skb->priority < priority)
2716 break;
2717
2718 skb = skb_dequeue(&chan->data_q);
2719
2720 hci_send_frame(skb);
2721 hdev->le_last_tx = jiffies;
2722
2723 cnt--;
2724 chan->sent++;
2725 chan->conn->sent++;
2726 }
2727 }
2728
2729 if (hdev->le_pkts)
2730 hdev->le_cnt = cnt;
2731 else
2732 hdev->acl_cnt = cnt;
2733
2734 if (cnt != tmp)
2735 hci_prio_recalculate(hdev, LE_LINK);
2736}
2737
2738static void hci_tx_work(struct work_struct *work)
2739{
2740 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
2741 struct sk_buff *skb;
2742
2743 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2744 hdev->sco_cnt, hdev->le_cnt);
2745
2746 /* Schedule queues and send stuff to HCI driver */
2747
2748 hci_sched_acl(hdev);
2749
2750 hci_sched_sco(hdev);
2751
2752 hci_sched_esco(hdev);
2753
2754 hci_sched_le(hdev);
2755
2756 /* Send next queued raw (unknown type) packet */
2757 while ((skb = skb_dequeue(&hdev->raw_q)))
2758 hci_send_frame(skb);
2759}
2760
2761/* ----- HCI RX task (incoming data processing) ----- */
2762
2763/* ACL data packet */
2764static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2765{
2766 struct hci_acl_hdr *hdr = (void *) skb->data;
2767 struct hci_conn *conn;
2768 __u16 handle, flags;
2769
2770 skb_pull(skb, HCI_ACL_HDR_SIZE);
2771
2772 handle = __le16_to_cpu(hdr->handle);
2773 flags = hci_flags(handle);
2774 handle = hci_handle(handle);
2775
2776 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2777
2778 hdev->stat.acl_rx++;
2779
2780 hci_dev_lock(hdev);
2781 conn = hci_conn_hash_lookup_handle(hdev, handle);
2782 hci_dev_unlock(hdev);
2783
2784 if (conn) {
2785 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
2786
2787 /* Send to upper protocol */
2788 l2cap_recv_acldata(conn, skb, flags);
2789 return;
2790 } else {
2791 BT_ERR("%s ACL packet for unknown connection handle %d",
2792 hdev->name, handle);
2793 }
2794
2795 kfree_skb(skb);
2796}
2797
2798/* SCO data packet */
2799static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2800{
2801 struct hci_sco_hdr *hdr = (void *) skb->data;
2802 struct hci_conn *conn;
2803 __u16 handle;
2804
2805 skb_pull(skb, HCI_SCO_HDR_SIZE);
2806
2807 handle = __le16_to_cpu(hdr->handle);
2808
2809 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2810
2811 hdev->stat.sco_rx++;
2812
2813 hci_dev_lock(hdev);
2814 conn = hci_conn_hash_lookup_handle(hdev, handle);
2815 hci_dev_unlock(hdev);
2816
2817 if (conn) {
2818 /* Send to upper protocol */
2819 sco_recv_scodata(conn, skb);
2820 return;
2821 } else {
2822 BT_ERR("%s SCO packet for unknown connection handle %d",
2823 hdev->name, handle);
2824 }
2825
2826 kfree_skb(skb);
2827}
2828
2829static void hci_rx_work(struct work_struct *work)
2830{
2831 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
2832 struct sk_buff *skb;
2833
2834 BT_DBG("%s", hdev->name);
2835
2836 while ((skb = skb_dequeue(&hdev->rx_q))) {
2837 /* Send copy to monitor */
2838 hci_send_to_monitor(hdev, skb);
2839
2840 if (atomic_read(&hdev->promisc)) {
2841 /* Send copy to the sockets */
2842 hci_send_to_sock(hdev, skb);
2843 }
2844
2845 if (test_bit(HCI_RAW, &hdev->flags)) {
2846 kfree_skb(skb);
2847 continue;
2848 }
2849
2850 if (test_bit(HCI_INIT, &hdev->flags)) {
2851 /* Don't process data packets in this states. */
2852 switch (bt_cb(skb)->pkt_type) {
2853 case HCI_ACLDATA_PKT:
2854 case HCI_SCODATA_PKT:
2855 kfree_skb(skb);
2856 continue;
2857 }
2858 }
2859
2860 /* Process frame */
2861 switch (bt_cb(skb)->pkt_type) {
2862 case HCI_EVENT_PKT:
2863 BT_DBG("%s Event packet", hdev->name);
2864 hci_event_packet(hdev, skb);
2865 break;
2866
2867 case HCI_ACLDATA_PKT:
2868 BT_DBG("%s ACL data packet", hdev->name);
2869 hci_acldata_packet(hdev, skb);
2870 break;
2871
2872 case HCI_SCODATA_PKT:
2873 BT_DBG("%s SCO data packet", hdev->name);
2874 hci_scodata_packet(hdev, skb);
2875 break;
2876
2877 default:
2878 kfree_skb(skb);
2879 break;
2880 }
2881 }
2882}
2883
2884static void hci_cmd_work(struct work_struct *work)
2885{
2886 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
2887 struct sk_buff *skb;
2888
2889 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2890
2891 /* Send queued commands */
2892 if (atomic_read(&hdev->cmd_cnt)) {
2893 skb = skb_dequeue(&hdev->cmd_q);
2894 if (!skb)
2895 return;
2896
2897 kfree_skb(hdev->sent_cmd);
2898
2899 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2900 if (hdev->sent_cmd) {
2901 atomic_dec(&hdev->cmd_cnt);
2902 hci_send_frame(skb);
2903 if (test_bit(HCI_RESET, &hdev->flags))
2904 del_timer(&hdev->cmd_timer);
2905 else
2906 mod_timer(&hdev->cmd_timer,
2907 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
2908 } else {
2909 skb_queue_head(&hdev->cmd_q, skb);
2910 queue_work(hdev->workqueue, &hdev->cmd_work);
2911 }
2912 }
2913}
2914
2915int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2916{
2917 /* General inquiry access code (GIAC) */
2918 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2919 struct hci_cp_inquiry cp;
2920
2921 BT_DBG("%s", hdev->name);
2922
2923 if (test_bit(HCI_INQUIRY, &hdev->flags))
2924 return -EINPROGRESS;
2925
2926 inquiry_cache_flush(hdev);
2927
2928 memset(&cp, 0, sizeof(cp));
2929 memcpy(&cp.lap, lap, sizeof(cp.lap));
2930 cp.length = length;
2931
2932 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2933}
2934
2935int hci_cancel_inquiry(struct hci_dev *hdev)
2936{
2937 BT_DBG("%s", hdev->name);
2938
2939 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2940 return -EPERM;
2941
2942 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2943}
kernel source for telekom puls (alcatel/mediatek)