projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
Merge tag 'v3.10.55' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
... / ...
CommitLineData
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/idr.h>
30
31#include <linux/rfkill.h>
32
33#include <net/bluetooth/bluetooth.h>
34#include <net/bluetooth/hci_core.h>
35
36static void hci_rx_work(struct work_struct *work);
37static void hci_cmd_work(struct work_struct *work);
38static void hci_tx_work(struct work_struct *work);
39
40/* HCI device list */
41LIST_HEAD(hci_dev_list);
42DEFINE_RWLOCK(hci_dev_list_lock);
43
44/* HCI callback list */
45LIST_HEAD(hci_cb_list);
46DEFINE_RWLOCK(hci_cb_list_lock);
47
48/* HCI ID Numbering */
49static DEFINE_IDA(hci_index_ida);
50
51/* ---- HCI notifications ---- */
52
53static void hci_notify(struct hci_dev *hdev, int event)
54{
55 hci_sock_dev_event(hdev, event);
56}
57
58/* ---- HCI requests ---- */
59
60static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
61{
62 BT_DBG("%s result 0x%2.2x", hdev->name, result);
63
64 if (hdev->req_status == HCI_REQ_PEND) {
65 hdev->req_result = result;
66 hdev->req_status = HCI_REQ_DONE;
67 wake_up_interruptible(&hdev->req_wait_q);
68 }
69}
70
71static void hci_req_cancel(struct hci_dev *hdev, int err)
72{
73 BT_DBG("%s err 0x%2.2x", hdev->name, err);
74
75 if (hdev->req_status == HCI_REQ_PEND) {
76 hdev->req_result = err;
77 hdev->req_status = HCI_REQ_CANCELED;
78 wake_up_interruptible(&hdev->req_wait_q);
79 }
80}
81
82static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
83 u8 event)
84{
85 struct hci_ev_cmd_complete *ev;
86 struct hci_event_hdr *hdr;
87 struct sk_buff *skb;
88
89 hci_dev_lock(hdev);
90
91 skb = hdev->recv_evt;
92 hdev->recv_evt = NULL;
93
94 hci_dev_unlock(hdev);
95
96 if (!skb)
97 return ERR_PTR(-ENODATA);
98
99 if (skb->len < sizeof(*hdr)) {
100 BT_ERR("Too short HCI event");
101 goto failed;
102 }
103
104 hdr = (void *) skb->data;
105 skb_pull(skb, HCI_EVENT_HDR_SIZE);
106
107 if (event) {
108 if (hdr->evt != event)
109 goto failed;
110 return skb;
111 }
112
113 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
114 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
115 goto failed;
116 }
117
118 if (skb->len < sizeof(*ev)) {
119 BT_ERR("Too short cmd_complete event");
120 goto failed;
121 }
122
123 ev = (void *) skb->data;
124 skb_pull(skb, sizeof(*ev));
125
126 if (opcode == __le16_to_cpu(ev->opcode))
127 return skb;
128
129 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
130 __le16_to_cpu(ev->opcode));
131
132failed:
133 kfree_skb(skb);
134 return ERR_PTR(-ENODATA);
135}
136
137struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
138 const void *param, u8 event, u32 timeout)
139{
140 DECLARE_WAITQUEUE(wait, current);
141 struct hci_request req;
142 int err = 0;
143
144 BT_DBG("%s", hdev->name);
145
146 hci_req_init(&req, hdev);
147
148 hci_req_add_ev(&req, opcode, plen, param, event);
149
150 hdev->req_status = HCI_REQ_PEND;
151
152 err = hci_req_run(&req, hci_req_sync_complete);
153 if (err < 0)
154 return ERR_PTR(err);
155
156 add_wait_queue(&hdev->req_wait_q, &wait);
157 set_current_state(TASK_INTERRUPTIBLE);
158
159 schedule_timeout(timeout);
160
161 remove_wait_queue(&hdev->req_wait_q, &wait);
162
163 if (signal_pending(current))
164 return ERR_PTR(-EINTR);
165
166 switch (hdev->req_status) {
167 case HCI_REQ_DONE:
168 err = -bt_to_errno(hdev->req_result);
169 break;
170
171 case HCI_REQ_CANCELED:
172 err = -hdev->req_result;
173 break;
174
175 default:
176 err = -ETIMEDOUT;
177 break;
178 }
179
180 hdev->req_status = hdev->req_result = 0;
181
182 BT_DBG("%s end: err %d", hdev->name, err);
183
184 if (err < 0)
185 return ERR_PTR(err);
186
187 return hci_get_cmd_complete(hdev, opcode, event);
188}
189EXPORT_SYMBOL(__hci_cmd_sync_ev);
190
191struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
192 const void *param, u32 timeout)
193{
194 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
195}
196EXPORT_SYMBOL(__hci_cmd_sync);
197
198/* Execute request and wait for completion. */
199static int __hci_req_sync(struct hci_dev *hdev,
200 void (*func)(struct hci_request *req,
201 unsigned long opt),
202 unsigned long opt, __u32 timeout)
203{
204 struct hci_request req;
205 DECLARE_WAITQUEUE(wait, current);
206 int err = 0;
207
208 BT_DBG("%s start", hdev->name);
209
210 hci_req_init(&req, hdev);
211
212 hdev->req_status = HCI_REQ_PEND;
213
214 func(&req, opt);
215
216 err = hci_req_run(&req, hci_req_sync_complete);
217 if (err < 0) {
218 hdev->req_status = 0;
219
220 /* ENODATA means the HCI request command queue is empty.
221 * This can happen when a request with conditionals doesn't
222 * trigger any commands to be sent. This is normal behavior
223 * and should not trigger an error return.
224 */
225 if (err == -ENODATA)
226 return 0;
227
228 return err;
229 }
230
231 add_wait_queue(&hdev->req_wait_q, &wait);
232 set_current_state(TASK_INTERRUPTIBLE);
233
234 schedule_timeout(timeout);
235
236 remove_wait_queue(&hdev->req_wait_q, &wait);
237
238 if (signal_pending(current))
239 return -EINTR;
240
241 switch (hdev->req_status) {
242 case HCI_REQ_DONE:
243 err = -bt_to_errno(hdev->req_result);
244 break;
245
246 case HCI_REQ_CANCELED:
247 err = -hdev->req_result;
248 break;
249
250 default:
251 err = -ETIMEDOUT;
252 break;
253 }
254
255 hdev->req_status = hdev->req_result = 0;
256
257 BT_DBG("%s end: err %d", hdev->name, err);
258
259 return err;
260}
261
262static int hci_req_sync(struct hci_dev *hdev,
263 void (*req)(struct hci_request *req,
264 unsigned long opt),
265 unsigned long opt, __u32 timeout)
266{
267 int ret;
268
269 if (!test_bit(HCI_UP, &hdev->flags))
270 return -ENETDOWN;
271
272 /* Serialize all requests */
273 hci_req_lock(hdev);
274 ret = __hci_req_sync(hdev, req, opt, timeout);
275 hci_req_unlock(hdev);
276
277 return ret;
278}
279
280static void hci_reset_req(struct hci_request *req, unsigned long opt)
281{
282 BT_DBG("%s %ld", req->hdev->name, opt);
283
284 /* Reset device */
285 set_bit(HCI_RESET, &req->hdev->flags);
286 hci_req_add(req, HCI_OP_RESET, 0, NULL);
287}
288
289static void bredr_init(struct hci_request *req)
290{
291 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
292
293 /* Read Local Supported Features */
294 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
295
296 /* Read Local Version */
297 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
298
299 /* Read BD Address */
300 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
301}
302
303static void amp_init(struct hci_request *req)
304{
305 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
306
307 /* Read Local Version */
308 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
309
310 /* Read Local AMP Info */
311 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
312
313 /* Read Data Blk size */
314 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
315}
316
317static void hci_init1_req(struct hci_request *req, unsigned long opt)
318{
319 struct hci_dev *hdev = req->hdev;
320
321 BT_DBG("%s %ld", hdev->name, opt);
322
323 /* Reset */
324 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
325 hci_reset_req(req, 0);
326
327 switch (hdev->dev_type) {
328 case HCI_BREDR:
329 bredr_init(req);
330 break;
331
332 case HCI_AMP:
333 amp_init(req);
334 break;
335
336 default:
337 BT_ERR("Unknown device type %d", hdev->dev_type);
338 break;
339 }
340}
341
342static void bredr_setup(struct hci_request *req)
343{
344 __le16 param;
345 __u8 flt_type;
346
347 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
348 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
349
350 /* Read Class of Device */
351 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
352
353 /* Read Local Name */
354 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
355
356 /* Read Voice Setting */
357 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
358
359 /* Clear Event Filters */
360 flt_type = HCI_FLT_CLEAR_ALL;
361 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
362
363 /* Connection accept timeout ~20 secs */
364 param = __constant_cpu_to_le16(0x7d00);
365 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
366
367 /* Read page scan parameters */
368 if (req->hdev->hci_ver > BLUETOOTH_VER_1_1) {
369 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
370 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
371 }
372}
373
374static void le_setup(struct hci_request *req)
375{
376 struct hci_dev *hdev = req->hdev;
377
378 /* Read LE Buffer Size */
379 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
380
381 /* Read LE Local Supported Features */
382 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
383
384 /* Read LE Advertising Channel TX Power */
385 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
386
387 /* Read LE White List Size */
388 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
389
390 /* Read LE Supported States */
391 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
392
393 /* LE-only controllers have LE implicitly enabled */
394 if (!lmp_bredr_capable(hdev))
395 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
396}
397
398static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
399{
400 if (lmp_ext_inq_capable(hdev))
401 return 0x02;
402
403 if (lmp_inq_rssi_capable(hdev))
404 return 0x01;
405
406 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
407 hdev->lmp_subver == 0x0757)
408 return 0x01;
409
410 if (hdev->manufacturer == 15) {
411 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
412 return 0x01;
413 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
414 return 0x01;
415 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
416 return 0x01;
417 }
418
419 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
420 hdev->lmp_subver == 0x1805)
421 return 0x01;
422
423 return 0x00;
424}
425
426static void hci_setup_inquiry_mode(struct hci_request *req)
427{
428 u8 mode;
429
430 mode = hci_get_inquiry_mode(req->hdev);
431
432 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
433}
434
435static void hci_setup_event_mask(struct hci_request *req)
436{
437 struct hci_dev *hdev = req->hdev;
438
439 /* The second byte is 0xff instead of 0x9f (two reserved bits
440 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
441 * command otherwise.
442 */
443 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
444
445 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
446 * any event mask for pre 1.2 devices.
447 */
448 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
449 return;
450
451 if (lmp_bredr_capable(hdev)) {
452 events[4] |= 0x01; /* Flow Specification Complete */
453 events[4] |= 0x02; /* Inquiry Result with RSSI */
454 events[4] |= 0x04; /* Read Remote Extended Features Complete */
455 events[5] |= 0x08; /* Synchronous Connection Complete */
456 events[5] |= 0x10; /* Synchronous Connection Changed */
457 }
458
459 if (lmp_inq_rssi_capable(hdev))
460 events[4] |= 0x02; /* Inquiry Result with RSSI */
461
462 if (lmp_sniffsubr_capable(hdev))
463 events[5] |= 0x20; /* Sniff Subrating */
464
465 if (lmp_pause_enc_capable(hdev))
466 events[5] |= 0x80; /* Encryption Key Refresh Complete */
467
468 if (lmp_ext_inq_capable(hdev))
469 events[5] |= 0x40; /* Extended Inquiry Result */
470
471 if (lmp_no_flush_capable(hdev))
472 events[7] |= 0x01; /* Enhanced Flush Complete */
473
474 if (lmp_lsto_capable(hdev))
475 events[6] |= 0x80; /* Link Supervision Timeout Changed */
476
477 if (lmp_ssp_capable(hdev)) {
478 events[6] |= 0x01; /* IO Capability Request */
479 events[6] |= 0x02; /* IO Capability Response */
480 events[6] |= 0x04; /* User Confirmation Request */
481 events[6] |= 0x08; /* User Passkey Request */
482 events[6] |= 0x10; /* Remote OOB Data Request */
483 events[6] |= 0x20; /* Simple Pairing Complete */
484 events[7] |= 0x04; /* User Passkey Notification */
485 events[7] |= 0x08; /* Keypress Notification */
486 events[7] |= 0x10; /* Remote Host Supported
487 * Features Notification
488 */
489 }
490
491 if (lmp_le_capable(hdev))
492 events[7] |= 0x20; /* LE Meta-Event */
493
494 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
495
496 if (lmp_le_capable(hdev)) {
497 memset(events, 0, sizeof(events));
498 events[0] = 0x1f;
499 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
500 sizeof(events), events);
501 }
502}
503
504static void hci_init2_req(struct hci_request *req, unsigned long opt)
505{
506 struct hci_dev *hdev = req->hdev;
507
508 if (lmp_bredr_capable(hdev))
509 bredr_setup(req);
510
511 if (lmp_le_capable(hdev))
512 le_setup(req);
513
514 hci_setup_event_mask(req);
515
516 if (hdev->hci_ver > BLUETOOTH_VER_1_1)
517 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
518
519 if (lmp_ssp_capable(hdev)) {
520 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
521 u8 mode = 0x01;
522 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
523 sizeof(mode), &mode);
524 } else {
525 struct hci_cp_write_eir cp;
526
527 memset(hdev->eir, 0, sizeof(hdev->eir));
528 memset(&cp, 0, sizeof(cp));
529
530 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
531 }
532 }
533
534 if (lmp_inq_rssi_capable(hdev))
535 hci_setup_inquiry_mode(req);
536
537 if (lmp_inq_tx_pwr_capable(hdev))
538 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
539
540 if (lmp_ext_feat_capable(hdev)) {
541 struct hci_cp_read_local_ext_features cp;
542
543 cp.page = 0x01;
544 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
545 sizeof(cp), &cp);
546 }
547
548 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
549 u8 enable = 1;
550 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
551 &enable);
552 }
553}
554
555static void hci_setup_link_policy(struct hci_request *req)
556{
557 struct hci_dev *hdev = req->hdev;
558 struct hci_cp_write_def_link_policy cp;
559 u16 link_policy = 0;
560
561 if (lmp_rswitch_capable(hdev))
562 link_policy |= HCI_LP_RSWITCH;
563 if (lmp_hold_capable(hdev))
564 link_policy |= HCI_LP_HOLD;
565 if (lmp_sniff_capable(hdev))
566 link_policy |= HCI_LP_SNIFF;
567 if (lmp_park_capable(hdev))
568 link_policy |= HCI_LP_PARK;
569
570 cp.policy = cpu_to_le16(link_policy);
571 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
572}
573
574static void hci_set_le_support(struct hci_request *req)
575{
576 struct hci_dev *hdev = req->hdev;
577 struct hci_cp_write_le_host_supported cp;
578
579 /* LE-only devices do not support explicit enablement */
580 if (!lmp_bredr_capable(hdev))
581 return;
582
583 memset(&cp, 0, sizeof(cp));
584
585 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
586 cp.le = 0x01;
587 cp.simul = lmp_le_br_capable(hdev);
588 }
589
590 if (cp.le != lmp_host_le_capable(hdev))
591 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
592 &cp);
593}
594
595static void hci_init3_req(struct hci_request *req, unsigned long opt)
596{
597 struct hci_dev *hdev = req->hdev;
598 u8 p;
599
600 /* Only send HCI_Delete_Stored_Link_Key if it is supported */
601 if (hdev->commands[6] & 0x80) {
602 struct hci_cp_delete_stored_link_key cp;
603
604 bacpy(&cp.bdaddr, BDADDR_ANY);
605 cp.delete_all = 0x01;
606 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
607 sizeof(cp), &cp);
608 }
609
610 if (hdev->commands[5] & 0x10)
611 hci_setup_link_policy(req);
612
613 if (lmp_le_capable(hdev)) {
614 hci_set_le_support(req);
615 hci_update_ad(req);
616 }
617
618 /* Read features beyond page 1 if available */
619 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
620 struct hci_cp_read_local_ext_features cp;
621
622 cp.page = p;
623 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
624 sizeof(cp), &cp);
625 }
626}
627
628static int __hci_init(struct hci_dev *hdev)
629{
630 int err;
631
632 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
633 if (err < 0)
634 return err;
635
636 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
637 * BR/EDR/LE type controllers. AMP controllers only need the
638 * first stage init.
639 */
640 if (hdev->dev_type != HCI_BREDR)
641 return 0;
642
643 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
644 if (err < 0)
645 return err;
646
647 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
648}
649
650static void hci_scan_req(struct hci_request *req, unsigned long opt)
651{
652 __u8 scan = opt;
653
654 BT_DBG("%s %x", req->hdev->name, scan);
655
656 /* Inquiry and Page scans */
657 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
658}
659
660static void hci_auth_req(struct hci_request *req, unsigned long opt)
661{
662 __u8 auth = opt;
663
664 BT_DBG("%s %x", req->hdev->name, auth);
665
666 /* Authentication */
667 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
668}
669
670static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
671{
672 __u8 encrypt = opt;
673
674 BT_DBG("%s %x", req->hdev->name, encrypt);
675
676 /* Encryption */
677 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
678}
679
680static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
681{
682 __le16 policy = cpu_to_le16(opt);
683
684 BT_DBG("%s %x", req->hdev->name, policy);
685
686 /* Default link policy */
687 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
688}
689
690/* Get HCI device by index.
691 * Device is held on return. */
692struct hci_dev *hci_dev_get(int index)
693{
694 struct hci_dev *hdev = NULL, *d;
695
696 BT_DBG("%d", index);
697
698 if (index < 0)
699 return NULL;
700
701 read_lock(&hci_dev_list_lock);
702 list_for_each_entry(d, &hci_dev_list, list) {
703 if (d->id == index) {
704 hdev = hci_dev_hold(d);
705 break;
706 }
707 }
708 read_unlock(&hci_dev_list_lock);
709 return hdev;
710}
711
712/* ---- Inquiry support ---- */
713
714bool hci_discovery_active(struct hci_dev *hdev)
715{
716 struct discovery_state *discov = &hdev->discovery;
717
718 switch (discov->state) {
719 case DISCOVERY_FINDING:
720 case DISCOVERY_RESOLVING:
721 return true;
722
723 default:
724 return false;
725 }
726}
727
728void hci_discovery_set_state(struct hci_dev *hdev, int state)
729{
730 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
731
732 if (hdev->discovery.state == state)
733 return;
734
735 switch (state) {
736 case DISCOVERY_STOPPED:
737 if (hdev->discovery.state != DISCOVERY_STARTING)
738 mgmt_discovering(hdev, 0);
739 break;
740 case DISCOVERY_STARTING:
741 break;
742 case DISCOVERY_FINDING:
743 mgmt_discovering(hdev, 1);
744 break;
745 case DISCOVERY_RESOLVING:
746 break;
747 case DISCOVERY_STOPPING:
748 break;
749 }
750
751 hdev->discovery.state = state;
752}
753
754static void inquiry_cache_flush(struct hci_dev *hdev)
755{
756 struct discovery_state *cache = &hdev->discovery;
757 struct inquiry_entry *p, *n;
758
759 list_for_each_entry_safe(p, n, &cache->all, all) {
760 list_del(&p->all);
761 kfree(p);
762 }
763
764 INIT_LIST_HEAD(&cache->unknown);
765 INIT_LIST_HEAD(&cache->resolve);
766}
767
768struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
769 bdaddr_t *bdaddr)
770{
771 struct discovery_state *cache = &hdev->discovery;
772 struct inquiry_entry *e;
773
774 BT_DBG("cache %p, %pMR", cache, bdaddr);
775
776 list_for_each_entry(e, &cache->all, all) {
777 if (!bacmp(&e->data.bdaddr, bdaddr))
778 return e;
779 }
780
781 return NULL;
782}
783
784struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
785 bdaddr_t *bdaddr)
786{
787 struct discovery_state *cache = &hdev->discovery;
788 struct inquiry_entry *e;
789
790 BT_DBG("cache %p, %pMR", cache, bdaddr);
791
792 list_for_each_entry(e, &cache->unknown, list) {
793 if (!bacmp(&e->data.bdaddr, bdaddr))
794 return e;
795 }
796
797 return NULL;
798}
799
800struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
801 bdaddr_t *bdaddr,
802 int state)
803{
804 struct discovery_state *cache = &hdev->discovery;
805 struct inquiry_entry *e;
806
807 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
808
809 list_for_each_entry(e, &cache->resolve, list) {
810 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
811 return e;
812 if (!bacmp(&e->data.bdaddr, bdaddr))
813 return e;
814 }
815
816 return NULL;
817}
818
819void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
820 struct inquiry_entry *ie)
821{
822 struct discovery_state *cache = &hdev->discovery;
823 struct list_head *pos = &cache->resolve;
824 struct inquiry_entry *p;
825
826 list_del(&ie->list);
827
828 list_for_each_entry(p, &cache->resolve, list) {
829 if (p->name_state != NAME_PENDING &&
830 abs(p->data.rssi) >= abs(ie->data.rssi))
831 break;
832 pos = &p->list;
833 }
834
835 list_add(&ie->list, pos);
836}
837
838bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
839 bool name_known, bool *ssp)
840{
841 struct discovery_state *cache = &hdev->discovery;
842 struct inquiry_entry *ie;
843
844 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
845
846 hci_remove_remote_oob_data(hdev, &data->bdaddr);
847
848 if (ssp)
849 *ssp = data->ssp_mode;
850
851 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
852 if (ie) {
853 if (ie->data.ssp_mode && ssp)
854 *ssp = true;
855
856 if (ie->name_state == NAME_NEEDED &&
857 data->rssi != ie->data.rssi) {
858 ie->data.rssi = data->rssi;
859 hci_inquiry_cache_update_resolve(hdev, ie);
860 }
861
862 goto update;
863 }
864
865 /* Entry not in the cache. Add new one. */
866 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
867 if (!ie)
868 return false;
869
870 list_add(&ie->all, &cache->all);
871
872 if (name_known) {
873 ie->name_state = NAME_KNOWN;
874 } else {
875 ie->name_state = NAME_NOT_KNOWN;
876 list_add(&ie->list, &cache->unknown);
877 }
878
879update:
880 if (name_known && ie->name_state != NAME_KNOWN &&
881 ie->name_state != NAME_PENDING) {
882 ie->name_state = NAME_KNOWN;
883 list_del(&ie->list);
884 }
885
886 memcpy(&ie->data, data, sizeof(*data));
887 ie->timestamp = jiffies;
888 cache->timestamp = jiffies;
889
890 if (ie->name_state == NAME_NOT_KNOWN)
891 return false;
892
893 return true;
894}
895
896static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
897{
898 struct discovery_state *cache = &hdev->discovery;
899 struct inquiry_info *info = (struct inquiry_info *) buf;
900 struct inquiry_entry *e;
901 int copied = 0;
902
903 list_for_each_entry(e, &cache->all, all) {
904 struct inquiry_data *data = &e->data;
905
906 if (copied >= num)
907 break;
908
909 bacpy(&info->bdaddr, &data->bdaddr);
910 info->pscan_rep_mode = data->pscan_rep_mode;
911 info->pscan_period_mode = data->pscan_period_mode;
912 info->pscan_mode = data->pscan_mode;
913 memcpy(info->dev_class, data->dev_class, 3);
914 info->clock_offset = data->clock_offset;
915
916 info++;
917 copied++;
918 }
919
920 BT_DBG("cache %p, copied %d", cache, copied);
921 return copied;
922}
923
924static void hci_inq_req(struct hci_request *req, unsigned long opt)
925{
926 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
927 struct hci_dev *hdev = req->hdev;
928 struct hci_cp_inquiry cp;
929
930 BT_DBG("%s", hdev->name);
931
932 if (test_bit(HCI_INQUIRY, &hdev->flags))
933 return;
934
935 /* Start Inquiry */
936 memcpy(&cp.lap, &ir->lap, 3);
937 cp.length = ir->length;
938 cp.num_rsp = ir->num_rsp;
939 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
940}
941
942static int wait_inquiry(void *word)
943{
944 schedule();
945 return signal_pending(current);
946}
947
948int hci_inquiry(void __user *arg)
949{
950 __u8 __user *ptr = arg;
951 struct hci_inquiry_req ir;
952 struct hci_dev *hdev;
953 int err = 0, do_inquiry = 0, max_rsp;
954 long timeo;
955 __u8 *buf;
956
957 if (copy_from_user(&ir, ptr, sizeof(ir)))
958 return -EFAULT;
959
960 hdev = hci_dev_get(ir.dev_id);
961 if (!hdev)
962 return -ENODEV;
963
964 hci_dev_lock(hdev);
965 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
966 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
967 inquiry_cache_flush(hdev);
968 do_inquiry = 1;
969 }
970 hci_dev_unlock(hdev);
971
972 timeo = ir.length * msecs_to_jiffies(2000);
973
974 if (do_inquiry) {
975 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
976 timeo);
977 if (err < 0)
978 goto done;
979
980 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
981 * cleared). If it is interrupted by a signal, return -EINTR.
982 */
983 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
984 TASK_INTERRUPTIBLE))
985 return -EINTR;
986 }
987
988 /* for unlimited number of responses we will use buffer with
989 * 255 entries
990 */
991 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
992
993 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
994 * copy it to the user space.
995 */
996 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
997 if (!buf) {
998 err = -ENOMEM;
999 goto done;
1000 }
1001
1002 hci_dev_lock(hdev);
1003 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1004 hci_dev_unlock(hdev);
1005
1006 BT_DBG("num_rsp %d", ir.num_rsp);
1007
1008 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1009 ptr += sizeof(ir);
1010 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1011 ir.num_rsp))
1012 err = -EFAULT;
1013 } else
1014 err = -EFAULT;
1015
1016 kfree(buf);
1017
1018done:
1019 hci_dev_put(hdev);
1020 return err;
1021}
1022
1023static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1024{
1025 u8 ad_len = 0, flags = 0;
1026 size_t name_len;
1027
1028 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1029 flags |= LE_AD_GENERAL;
1030
1031 if (!lmp_bredr_capable(hdev))
1032 flags |= LE_AD_NO_BREDR;
1033
1034 if (lmp_le_br_capable(hdev))
1035 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1036
1037 if (lmp_host_le_br_capable(hdev))
1038 flags |= LE_AD_SIM_LE_BREDR_HOST;
1039
1040 if (flags) {
1041 BT_DBG("adv flags 0x%02x", flags);
1042
1043 ptr[0] = 2;
1044 ptr[1] = EIR_FLAGS;
1045 ptr[2] = flags;
1046
1047 ad_len += 3;
1048 ptr += 3;
1049 }
1050
1051 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1052 ptr[0] = 2;
1053 ptr[1] = EIR_TX_POWER;
1054 ptr[2] = (u8) hdev->adv_tx_power;
1055
1056 ad_len += 3;
1057 ptr += 3;
1058 }
1059
1060 name_len = strlen(hdev->dev_name);
1061 if (name_len > 0) {
1062 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1063
1064 if (name_len > max_len) {
1065 name_len = max_len;
1066 ptr[1] = EIR_NAME_SHORT;
1067 } else
1068 ptr[1] = EIR_NAME_COMPLETE;
1069
1070 ptr[0] = name_len + 1;
1071
1072 memcpy(ptr + 2, hdev->dev_name, name_len);
1073
1074 ad_len += (name_len + 2);
1075 ptr += (name_len + 2);
1076 }
1077
1078 return ad_len;
1079}
1080
1081void hci_update_ad(struct hci_request *req)
1082{
1083 struct hci_dev *hdev = req->hdev;
1084 struct hci_cp_le_set_adv_data cp;
1085 u8 len;
1086
1087 if (!lmp_le_capable(hdev))
1088 return;
1089
1090 memset(&cp, 0, sizeof(cp));
1091
1092 len = create_ad(hdev, cp.data);
1093
1094 if (hdev->adv_data_len == len &&
1095 memcmp(cp.data, hdev->adv_data, len) == 0)
1096 return;
1097
1098 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1099 hdev->adv_data_len = len;
1100
1101 cp.length = len;
1102
1103 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
1104}
1105
1106/* ---- HCI ioctl helpers ---- */
1107
1108int hci_dev_open(__u16 dev)
1109{
1110 struct hci_dev *hdev;
1111 int ret = 0;
1112
1113 hdev = hci_dev_get(dev);
1114 if (!hdev)
1115 return -ENODEV;
1116
1117 BT_DBG("%s %p", hdev->name, hdev);
1118
1119 hci_req_lock(hdev);
1120
1121 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1122 ret = -ENODEV;
1123 goto done;
1124 }
1125
1126 /* Check for rfkill but allow the HCI setup stage to proceed
1127 * (which in itself doesn't cause any RF activity).
1128 */
1129 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) &&
1130 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1131 ret = -ERFKILL;
1132 goto done;
1133 }
1134
1135 if (test_bit(HCI_UP, &hdev->flags)) {
1136 ret = -EALREADY;
1137 goto done;
1138 }
1139
1140 if (hdev->open(hdev)) {
1141 ret = -EIO;
1142 goto done;
1143 }
1144
1145 atomic_set(&hdev->cmd_cnt, 1);
1146 set_bit(HCI_INIT, &hdev->flags);
1147
1148 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1149 ret = hdev->setup(hdev);
1150
1151 if (!ret) {
1152 /* Treat all non BR/EDR controllers as raw devices if
1153 * enable_hs is not set.
1154 */
1155 if (hdev->dev_type != HCI_BREDR && !enable_hs)
1156 set_bit(HCI_RAW, &hdev->flags);
1157
1158 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1159 set_bit(HCI_RAW, &hdev->flags);
1160
1161 if (!test_bit(HCI_RAW, &hdev->flags))
1162 ret = __hci_init(hdev);
1163 }
1164
1165 clear_bit(HCI_INIT, &hdev->flags);
1166
1167 if (!ret) {
1168 hci_dev_hold(hdev);
1169 set_bit(HCI_UP, &hdev->flags);
1170 hci_notify(hdev, HCI_DEV_UP);
1171 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1172 mgmt_valid_hdev(hdev)) {
1173 hci_dev_lock(hdev);
1174 mgmt_powered(hdev, 1);
1175 hci_dev_unlock(hdev);
1176 }
1177 } else {
1178 /* Init failed, cleanup */
1179 flush_work(&hdev->tx_work);
1180 flush_work(&hdev->cmd_work);
1181 flush_work(&hdev->rx_work);
1182
1183 skb_queue_purge(&hdev->cmd_q);
1184 skb_queue_purge(&hdev->rx_q);
1185
1186 if (hdev->flush)
1187 hdev->flush(hdev);
1188
1189 if (hdev->sent_cmd) {
1190 kfree_skb(hdev->sent_cmd);
1191 hdev->sent_cmd = NULL;
1192 }
1193
1194 hdev->close(hdev);
1195 hdev->flags = 0;
1196 }
1197
1198done:
1199 hci_req_unlock(hdev);
1200 hci_dev_put(hdev);
1201 return ret;
1202}
1203
1204static int hci_dev_do_close(struct hci_dev *hdev)
1205{
1206 BT_DBG("%s %p", hdev->name, hdev);
1207
1208 cancel_work_sync(&hdev->le_scan);
1209
1210 cancel_delayed_work(&hdev->power_off);
1211
1212 hci_req_cancel(hdev, ENODEV);
1213 hci_req_lock(hdev);
1214
1215 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1216 del_timer_sync(&hdev->cmd_timer);
1217 hci_req_unlock(hdev);
1218 return 0;
1219 }
1220
1221 /* Flush RX and TX works */
1222 flush_work(&hdev->tx_work);
1223 flush_work(&hdev->rx_work);
1224
1225 if (hdev->discov_timeout > 0) {
1226 cancel_delayed_work(&hdev->discov_off);
1227 hdev->discov_timeout = 0;
1228 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
1229 }
1230
1231 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
1232 cancel_delayed_work(&hdev->service_cache);
1233
1234 cancel_delayed_work_sync(&hdev->le_scan_disable);
1235
1236 hci_dev_lock(hdev);
1237 inquiry_cache_flush(hdev);
1238 hci_conn_hash_flush(hdev);
1239 hci_dev_unlock(hdev);
1240
1241 hci_notify(hdev, HCI_DEV_DOWN);
1242
1243 if (hdev->flush)
1244 hdev->flush(hdev);
1245
1246 /* Reset device */
1247 skb_queue_purge(&hdev->cmd_q);
1248 atomic_set(&hdev->cmd_cnt, 1);
1249 if (!test_bit(HCI_RAW, &hdev->flags) &&
1250 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1251 set_bit(HCI_INIT, &hdev->flags);
1252 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1253 clear_bit(HCI_INIT, &hdev->flags);
1254 }
1255
1256 /* flush cmd work */
1257 flush_work(&hdev->cmd_work);
1258
1259 /* Drop queues */
1260 skb_queue_purge(&hdev->rx_q);
1261 skb_queue_purge(&hdev->cmd_q);
1262 skb_queue_purge(&hdev->raw_q);
1263
1264 /* Drop last sent command */
1265 if (hdev->sent_cmd) {
1266 del_timer_sync(&hdev->cmd_timer);
1267 kfree_skb(hdev->sent_cmd);
1268 hdev->sent_cmd = NULL;
1269 }
1270
1271 kfree_skb(hdev->recv_evt);
1272 hdev->recv_evt = NULL;
1273
1274 /* After this point our queues are empty
1275 * and no tasks are scheduled. */
1276 hdev->close(hdev);
1277
1278 /* Clear flags */
1279 hdev->flags = 0;
1280 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1281
1282 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1283 mgmt_valid_hdev(hdev)) {
1284 hci_dev_lock(hdev);
1285 mgmt_powered(hdev, 0);
1286 hci_dev_unlock(hdev);
1287 }
1288
1289 /* Controller radio is available but is currently powered down */
1290 hdev->amp_status = 0;
1291
1292 memset(hdev->eir, 0, sizeof(hdev->eir));
1293 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1294
1295 hci_req_unlock(hdev);
1296
1297 hci_dev_put(hdev);
1298 return 0;
1299}
1300
1301int hci_dev_close(__u16 dev)
1302{
1303 struct hci_dev *hdev;
1304 int err;
1305
1306 hdev = hci_dev_get(dev);
1307 if (!hdev)
1308 return -ENODEV;
1309
1310 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1311 cancel_delayed_work(&hdev->power_off);
1312
1313 err = hci_dev_do_close(hdev);
1314
1315 hci_dev_put(hdev);
1316 return err;
1317}
1318
1319int hci_dev_reset(__u16 dev)
1320{
1321 struct hci_dev *hdev;
1322 int ret = 0;
1323
1324 hdev = hci_dev_get(dev);
1325 if (!hdev)
1326 return -ENODEV;
1327
1328 hci_req_lock(hdev);
1329
1330 if (!test_bit(HCI_UP, &hdev->flags))
1331 goto done;
1332
1333 /* Drop queues */
1334 skb_queue_purge(&hdev->rx_q);
1335 skb_queue_purge(&hdev->cmd_q);
1336
1337 hci_dev_lock(hdev);
1338 inquiry_cache_flush(hdev);
1339 hci_conn_hash_flush(hdev);
1340 hci_dev_unlock(hdev);
1341
1342 if (hdev->flush)
1343 hdev->flush(hdev);
1344
1345 atomic_set(&hdev->cmd_cnt, 1);
1346 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1347
1348 if (!test_bit(HCI_RAW, &hdev->flags))
1349 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1350
1351done:
1352 hci_req_unlock(hdev);
1353 hci_dev_put(hdev);
1354 return ret;
1355}
1356
1357int hci_dev_reset_stat(__u16 dev)
1358{
1359 struct hci_dev *hdev;
1360 int ret = 0;
1361
1362 hdev = hci_dev_get(dev);
1363 if (!hdev)
1364 return -ENODEV;
1365
1366 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1367
1368 hci_dev_put(hdev);
1369
1370 return ret;
1371}
1372
1373int hci_dev_cmd(unsigned int cmd, void __user *arg)
1374{
1375 struct hci_dev *hdev;
1376 struct hci_dev_req dr;
1377 int err = 0;
1378
1379 if (copy_from_user(&dr, arg, sizeof(dr)))
1380 return -EFAULT;
1381
1382 hdev = hci_dev_get(dr.dev_id);
1383 if (!hdev)
1384 return -ENODEV;
1385
1386 switch (cmd) {
1387 case HCISETAUTH:
1388 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1389 HCI_INIT_TIMEOUT);
1390 break;
1391
1392 case HCISETENCRYPT:
1393 if (!lmp_encrypt_capable(hdev)) {
1394 err = -EOPNOTSUPP;
1395 break;
1396 }
1397
1398 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1399 /* Auth must be enabled first */
1400 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1401 HCI_INIT_TIMEOUT);
1402 if (err)
1403 break;
1404 }
1405
1406 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1407 HCI_INIT_TIMEOUT);
1408 break;
1409
1410 case HCISETSCAN:
1411 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1412 HCI_INIT_TIMEOUT);
1413 break;
1414
1415 case HCISETLINKPOL:
1416 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1417 HCI_INIT_TIMEOUT);
1418 break;
1419
1420 case HCISETLINKMODE:
1421 hdev->link_mode = ((__u16) dr.dev_opt) &
1422 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1423 break;
1424
1425 case HCISETPTYPE:
1426 hdev->pkt_type = (__u16) dr.dev_opt;
1427 break;
1428
1429 case HCISETACLMTU:
1430 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1431 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1432 break;
1433
1434 case HCISETSCOMTU:
1435 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1436 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1437 break;
1438
1439 default:
1440 err = -EINVAL;
1441 break;
1442 }
1443
1444 hci_dev_put(hdev);
1445 return err;
1446}
1447
1448int hci_get_dev_list(void __user *arg)
1449{
1450 struct hci_dev *hdev;
1451 struct hci_dev_list_req *dl;
1452 struct hci_dev_req *dr;
1453 int n = 0, size, err;
1454 __u16 dev_num;
1455
1456 if (get_user(dev_num, (__u16 __user *) arg))
1457 return -EFAULT;
1458
1459 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1460 return -EINVAL;
1461
1462 size = sizeof(*dl) + dev_num * sizeof(*dr);
1463
1464 dl = kzalloc(size, GFP_KERNEL);
1465 if (!dl)
1466 return -ENOMEM;
1467
1468 dr = dl->dev_req;
1469
1470 read_lock(&hci_dev_list_lock);
1471 list_for_each_entry(hdev, &hci_dev_list, list) {
1472 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1473 cancel_delayed_work(&hdev->power_off);
1474
1475 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1476 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1477
1478 (dr + n)->dev_id = hdev->id;
1479 (dr + n)->dev_opt = hdev->flags;
1480
1481 if (++n >= dev_num)
1482 break;
1483 }
1484 read_unlock(&hci_dev_list_lock);
1485
1486 dl->dev_num = n;
1487 size = sizeof(*dl) + n * sizeof(*dr);
1488
1489 err = copy_to_user(arg, dl, size);
1490 kfree(dl);
1491
1492 return err ? -EFAULT : 0;
1493}
1494
1495int hci_get_dev_info(void __user *arg)
1496{
1497 struct hci_dev *hdev;
1498 struct hci_dev_info di;
1499 int err = 0;
1500
1501 if (copy_from_user(&di, arg, sizeof(di)))
1502 return -EFAULT;
1503
1504 hdev = hci_dev_get(di.dev_id);
1505 if (!hdev)
1506 return -ENODEV;
1507
1508 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1509 cancel_delayed_work_sync(&hdev->power_off);
1510
1511 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1512 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1513
1514 strcpy(di.name, hdev->name);
1515 di.bdaddr = hdev->bdaddr;
1516 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1517 di.flags = hdev->flags;
1518 di.pkt_type = hdev->pkt_type;
1519 if (lmp_bredr_capable(hdev)) {
1520 di.acl_mtu = hdev->acl_mtu;
1521 di.acl_pkts = hdev->acl_pkts;
1522 di.sco_mtu = hdev->sco_mtu;
1523 di.sco_pkts = hdev->sco_pkts;
1524 } else {
1525 di.acl_mtu = hdev->le_mtu;
1526 di.acl_pkts = hdev->le_pkts;
1527 di.sco_mtu = 0;
1528 di.sco_pkts = 0;
1529 }
1530 di.link_policy = hdev->link_policy;
1531 di.link_mode = hdev->link_mode;
1532
1533 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1534 memcpy(&di.features, &hdev->features, sizeof(di.features));
1535
1536 if (copy_to_user(arg, &di, sizeof(di)))
1537 err = -EFAULT;
1538
1539 hci_dev_put(hdev);
1540
1541 return err;
1542}
1543
1544/* ---- Interface to HCI drivers ---- */
1545
1546static int hci_rfkill_set_block(void *data, bool blocked)
1547{
1548 struct hci_dev *hdev = data;
1549
1550 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1551
1552 if (blocked) {
1553 set_bit(HCI_RFKILLED, &hdev->dev_flags);
1554 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1555 hci_dev_do_close(hdev);
1556 } else {
1557 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1558}
1559
1560 return 0;
1561}
1562
1563static const struct rfkill_ops hci_rfkill_ops = {
1564 .set_block = hci_rfkill_set_block,
1565};
1566
1567static void hci_power_on(struct work_struct *work)
1568{
1569 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1570 int err;
1571
1572 BT_DBG("%s", hdev->name);
1573
1574 err = hci_dev_open(hdev->id);
1575 if (err < 0) {
1576 mgmt_set_powered_failed(hdev, err);
1577 return;
1578 }
1579
1580 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
1581 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1582 hci_dev_do_close(hdev);
1583 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
1584 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1585 HCI_AUTO_OFF_TIMEOUT);
1586 }
1587
1588 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1589 mgmt_index_added(hdev);
1590}
1591
1592static void hci_power_off(struct work_struct *work)
1593{
1594 struct hci_dev *hdev = container_of(work, struct hci_dev,
1595 power_off.work);
1596
1597 BT_DBG("%s", hdev->name);
1598
1599 hci_dev_do_close(hdev);
1600}
1601
1602static void hci_discov_off(struct work_struct *work)
1603{
1604 struct hci_dev *hdev;
1605 u8 scan = SCAN_PAGE;
1606
1607 hdev = container_of(work, struct hci_dev, discov_off.work);
1608
1609 BT_DBG("%s", hdev->name);
1610
1611 hci_dev_lock(hdev);
1612
1613 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1614
1615 hdev->discov_timeout = 0;
1616
1617 hci_dev_unlock(hdev);
1618}
1619
1620int hci_uuids_clear(struct hci_dev *hdev)
1621{
1622 struct bt_uuid *uuid, *tmp;
1623
1624 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1625 list_del(&uuid->list);
1626 kfree(uuid);
1627 }
1628
1629 return 0;
1630}
1631
1632int hci_link_keys_clear(struct hci_dev *hdev)
1633{
1634 struct list_head *p, *n;
1635
1636 list_for_each_safe(p, n, &hdev->link_keys) {
1637 struct link_key *key;
1638
1639 key = list_entry(p, struct link_key, list);
1640
1641 list_del(p);
1642 kfree(key);
1643 }
1644
1645 return 0;
1646}
1647
1648int hci_smp_ltks_clear(struct hci_dev *hdev)
1649{
1650 struct smp_ltk *k, *tmp;
1651
1652 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1653 list_del(&k->list);
1654 kfree(k);
1655 }
1656
1657 return 0;
1658}
1659
1660struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1661{
1662 struct link_key *k;
1663
1664 list_for_each_entry(k, &hdev->link_keys, list)
1665 if (bacmp(bdaddr, &k->bdaddr) == 0)
1666 return k;
1667
1668 return NULL;
1669}
1670
1671static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1672 u8 key_type, u8 old_key_type)
1673{
1674 /* Legacy key */
1675 if (key_type < 0x03)
1676 return true;
1677
1678 /* Debug keys are insecure so don't store them persistently */
1679 if (key_type == HCI_LK_DEBUG_COMBINATION)
1680 return false;
1681
1682 /* Changed combination key and there's no previous one */
1683 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1684 return false;
1685
1686 /* Security mode 3 case */
1687 if (!conn)
1688 return true;
1689
1690 /* Neither local nor remote side had no-bonding as requirement */
1691 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1692 return true;
1693
1694 /* Local side had dedicated bonding as requirement */
1695 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1696 return true;
1697
1698 /* Remote side had dedicated bonding as requirement */
1699 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1700 return true;
1701
1702 /* If none of the above criteria match, then don't store the key
1703 * persistently */
1704 return false;
1705}
1706
1707struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1708{
1709 struct smp_ltk *k;
1710
1711 list_for_each_entry(k, &hdev->long_term_keys, list) {
1712 if (k->ediv != ediv ||
1713 memcmp(rand, k->rand, sizeof(k->rand)))
1714 continue;
1715
1716 return k;
1717 }
1718
1719 return NULL;
1720}
1721
1722struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1723 u8 addr_type)
1724{
1725 struct smp_ltk *k;
1726
1727 list_for_each_entry(k, &hdev->long_term_keys, list)
1728 if (addr_type == k->bdaddr_type &&
1729 bacmp(bdaddr, &k->bdaddr) == 0)
1730 return k;
1731
1732 return NULL;
1733}
1734
1735int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1736 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1737{
1738 struct link_key *key, *old_key;
1739 u8 old_key_type;
1740 bool persistent;
1741
1742 old_key = hci_find_link_key(hdev, bdaddr);
1743 if (old_key) {
1744 old_key_type = old_key->type;
1745 key = old_key;
1746 } else {
1747 old_key_type = conn ? conn->key_type : 0xff;
1748 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1749 if (!key)
1750 return -ENOMEM;
1751 list_add(&key->list, &hdev->link_keys);
1752 }
1753
1754 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1755
1756 /* Some buggy controller combinations generate a changed
1757 * combination key for legacy pairing even when there's no
1758 * previous key */
1759 if (type == HCI_LK_CHANGED_COMBINATION &&
1760 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1761 type = HCI_LK_COMBINATION;
1762 if (conn)
1763 conn->key_type = type;
1764 }
1765
1766 bacpy(&key->bdaddr, bdaddr);
1767 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1768 key->pin_len = pin_len;
1769
1770 if (type == HCI_LK_CHANGED_COMBINATION)
1771 key->type = old_key_type;
1772 else
1773 key->type = type;
1774
1775 if (!new_key)
1776 return 0;
1777
1778 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1779
1780 mgmt_new_link_key(hdev, key, persistent);
1781
1782 if (conn)
1783 conn->flush_key = !persistent;
1784
1785 return 0;
1786}
1787
1788int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1789 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
1790 ediv, u8 rand[8])
1791{
1792 struct smp_ltk *key, *old_key;
1793
1794 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1795 return 0;
1796
1797 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1798 if (old_key)
1799 key = old_key;
1800 else {
1801 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1802 if (!key)
1803 return -ENOMEM;
1804 list_add(&key->list, &hdev->long_term_keys);
1805 }
1806
1807 bacpy(&key->bdaddr, bdaddr);
1808 key->bdaddr_type = addr_type;
1809 memcpy(key->val, tk, sizeof(key->val));
1810 key->authenticated = authenticated;
1811 key->ediv = ediv;
1812 key->enc_size = enc_size;
1813 key->type = type;
1814 memcpy(key->rand, rand, sizeof(key->rand));
1815
1816 if (!new_key)
1817 return 0;
1818
1819 if (type & HCI_SMP_LTK)
1820 mgmt_new_ltk(hdev, key, 1);
1821
1822 return 0;
1823}
1824
1825int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1826{
1827 struct link_key *key;
1828
1829 key = hci_find_link_key(hdev, bdaddr);
1830 if (!key)
1831 return -ENOENT;
1832
1833 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1834
1835 list_del(&key->list);
1836 kfree(key);
1837
1838 return 0;
1839}
1840
1841int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1842{
1843 struct smp_ltk *k, *tmp;
1844
1845 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1846 if (bacmp(bdaddr, &k->bdaddr))
1847 continue;
1848
1849 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1850
1851 list_del(&k->list);
1852 kfree(k);
1853 }
1854
1855 return 0;
1856}
1857
1858/* HCI command timer function */
1859static void hci_cmd_timeout(unsigned long arg)
1860{
1861 struct hci_dev *hdev = (void *) arg;
1862
1863 if (hdev->sent_cmd) {
1864 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1865 u16 opcode = __le16_to_cpu(sent->opcode);
1866
1867 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1868 } else {
1869 BT_ERR("%s command tx timeout", hdev->name);
1870 }
1871
1872 atomic_set(&hdev->cmd_cnt, 1);
1873 queue_work(hdev->workqueue, &hdev->cmd_work);
1874}
1875
1876struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1877 bdaddr_t *bdaddr)
1878{
1879 struct oob_data *data;
1880
1881 list_for_each_entry(data, &hdev->remote_oob_data, list)
1882 if (bacmp(bdaddr, &data->bdaddr) == 0)
1883 return data;
1884
1885 return NULL;
1886}
1887
1888int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1889{
1890 struct oob_data *data;
1891
1892 data = hci_find_remote_oob_data(hdev, bdaddr);
1893 if (!data)
1894 return -ENOENT;
1895
1896 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1897
1898 list_del(&data->list);
1899 kfree(data);
1900
1901 return 0;
1902}
1903
1904int hci_remote_oob_data_clear(struct hci_dev *hdev)
1905{
1906 struct oob_data *data, *n;
1907
1908 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1909 list_del(&data->list);
1910 kfree(data);
1911 }
1912
1913 return 0;
1914}
1915
1916int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1917 u8 *randomizer)
1918{
1919 struct oob_data *data;
1920
1921 data = hci_find_remote_oob_data(hdev, bdaddr);
1922
1923 if (!data) {
1924 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1925 if (!data)
1926 return -ENOMEM;
1927
1928 bacpy(&data->bdaddr, bdaddr);
1929 list_add(&data->list, &hdev->remote_oob_data);
1930 }
1931
1932 memcpy(data->hash, hash, sizeof(data->hash));
1933 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1934
1935 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1936
1937 return 0;
1938}
1939
1940struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1941{
1942 struct bdaddr_list *b;
1943
1944 list_for_each_entry(b, &hdev->blacklist, list)
1945 if (bacmp(bdaddr, &b->bdaddr) == 0)
1946 return b;
1947
1948 return NULL;
1949}
1950
1951int hci_blacklist_clear(struct hci_dev *hdev)
1952{
1953 struct list_head *p, *n;
1954
1955 list_for_each_safe(p, n, &hdev->blacklist) {
1956 struct bdaddr_list *b;
1957
1958 b = list_entry(p, struct bdaddr_list, list);
1959
1960 list_del(p);
1961 kfree(b);
1962 }
1963
1964 return 0;
1965}
1966
1967int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1968{
1969 struct bdaddr_list *entry;
1970
1971 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1972 return -EBADF;
1973
1974 if (hci_blacklist_lookup(hdev, bdaddr))
1975 return -EEXIST;
1976
1977 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1978 if (!entry)
1979 return -ENOMEM;
1980
1981 bacpy(&entry->bdaddr, bdaddr);
1982
1983 list_add(&entry->list, &hdev->blacklist);
1984
1985 return mgmt_device_blocked(hdev, bdaddr, type);
1986}
1987
1988int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1989{
1990 struct bdaddr_list *entry;
1991
1992 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1993 return hci_blacklist_clear(hdev);
1994
1995 entry = hci_blacklist_lookup(hdev, bdaddr);
1996 if (!entry)
1997 return -ENOENT;
1998
1999 list_del(&entry->list);
2000 kfree(entry);
2001
2002 return mgmt_device_unblocked(hdev, bdaddr, type);
2003}
2004
2005static void le_scan_param_req(struct hci_request *req, unsigned long opt)
2006{
2007 struct le_scan_params *param = (struct le_scan_params *) opt;
2008 struct hci_cp_le_set_scan_param cp;
2009
2010 memset(&cp, 0, sizeof(cp));
2011 cp.type = param->type;
2012 cp.interval = cpu_to_le16(param->interval);
2013 cp.window = cpu_to_le16(param->window);
2014
2015 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
2016}
2017
2018static void le_scan_enable_req(struct hci_request *req, unsigned long opt)
2019{
2020 struct hci_cp_le_set_scan_enable cp;
2021
2022 memset(&cp, 0, sizeof(cp));
2023 cp.enable = LE_SCAN_ENABLE;
2024 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
2025
2026 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2027}
2028
2029static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
2030 u16 window, int timeout)
2031{
2032 long timeo = msecs_to_jiffies(3000);
2033 struct le_scan_params param;
2034 int err;
2035
2036 BT_DBG("%s", hdev->name);
2037
2038 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
2039 return -EINPROGRESS;
2040
2041 param.type = type;
2042 param.interval = interval;
2043 param.window = window;
2044
2045 hci_req_lock(hdev);
2046
2047 err = __hci_req_sync(hdev, le_scan_param_req, (unsigned long) &param,
2048 timeo);
2049 if (!err)
2050 err = __hci_req_sync(hdev, le_scan_enable_req, 0, timeo);
2051
2052 hci_req_unlock(hdev);
2053
2054 if (err < 0)
2055 return err;
2056
2057 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
2058 timeout);
2059
2060 return 0;
2061}
2062
2063int hci_cancel_le_scan(struct hci_dev *hdev)
2064{
2065 BT_DBG("%s", hdev->name);
2066
2067 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
2068 return -EALREADY;
2069
2070 if (cancel_delayed_work(&hdev->le_scan_disable)) {
2071 struct hci_cp_le_set_scan_enable cp;
2072
2073 /* Send HCI command to disable LE Scan */
2074 memset(&cp, 0, sizeof(cp));
2075 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2076 }
2077
2078 return 0;
2079}
2080
2081static void le_scan_disable_work(struct work_struct *work)
2082{
2083 struct hci_dev *hdev = container_of(work, struct hci_dev,
2084 le_scan_disable.work);
2085 struct hci_cp_le_set_scan_enable cp;
2086
2087 BT_DBG("%s", hdev->name);
2088
2089 memset(&cp, 0, sizeof(cp));
2090
2091 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2092}
2093
2094static void le_scan_work(struct work_struct *work)
2095{
2096 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
2097 struct le_scan_params *param = &hdev->le_scan_params;
2098
2099 BT_DBG("%s", hdev->name);
2100
2101 hci_do_le_scan(hdev, param->type, param->interval, param->window,
2102 param->timeout);
2103}
2104
2105int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
2106 int timeout)
2107{
2108 struct le_scan_params *param = &hdev->le_scan_params;
2109
2110 BT_DBG("%s", hdev->name);
2111
2112 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
2113 return -ENOTSUPP;
2114
2115 if (work_busy(&hdev->le_scan))
2116 return -EINPROGRESS;
2117
2118 param->type = type;
2119 param->interval = interval;
2120 param->window = window;
2121 param->timeout = timeout;
2122
2123 queue_work(system_long_wq, &hdev->le_scan);
2124
2125 return 0;
2126}
2127
2128/* Alloc HCI device */
2129struct hci_dev *hci_alloc_dev(void)
2130{
2131 struct hci_dev *hdev;
2132
2133 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2134 if (!hdev)
2135 return NULL;
2136
2137 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2138 hdev->esco_type = (ESCO_HV1);
2139 hdev->link_mode = (HCI_LM_ACCEPT);
2140 hdev->io_capability = 0x03; /* No Input No Output */
2141 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2142 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2143
2144 hdev->sniff_max_interval = 800;
2145 hdev->sniff_min_interval = 80;
2146
2147 mutex_init(&hdev->lock);
2148 mutex_init(&hdev->req_lock);
2149
2150 INIT_LIST_HEAD(&hdev->mgmt_pending);
2151 INIT_LIST_HEAD(&hdev->blacklist);
2152 INIT_LIST_HEAD(&hdev->uuids);
2153 INIT_LIST_HEAD(&hdev->link_keys);
2154 INIT_LIST_HEAD(&hdev->long_term_keys);
2155 INIT_LIST_HEAD(&hdev->remote_oob_data);
2156 INIT_LIST_HEAD(&hdev->conn_hash.list);
2157
2158 INIT_WORK(&hdev->rx_work, hci_rx_work);
2159 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2160 INIT_WORK(&hdev->tx_work, hci_tx_work);
2161 INIT_WORK(&hdev->power_on, hci_power_on);
2162 INIT_WORK(&hdev->le_scan, le_scan_work);
2163
2164 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2165 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2166 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2167
2168 skb_queue_head_init(&hdev->rx_q);
2169 skb_queue_head_init(&hdev->cmd_q);
2170 skb_queue_head_init(&hdev->raw_q);
2171
2172 init_waitqueue_head(&hdev->req_wait_q);
2173
2174 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
2175
2176 hci_init_sysfs(hdev);
2177 discovery_init(hdev);
2178
2179 return hdev;
2180}
2181EXPORT_SYMBOL(hci_alloc_dev);
2182
2183/* Free HCI device */
2184void hci_free_dev(struct hci_dev *hdev)
2185{
2186 /* will free via device release */
2187 put_device(&hdev->dev);
2188}
2189EXPORT_SYMBOL(hci_free_dev);
2190
2191/* Register HCI device */
2192int hci_register_dev(struct hci_dev *hdev)
2193{
2194 int id, error;
2195
2196 if (!hdev->open || !hdev->close)
2197 return -EINVAL;
2198
2199 /* Do not allow HCI_AMP devices to register at index 0,
2200 * so the index can be used as the AMP controller ID.
2201 */
2202 switch (hdev->dev_type) {
2203 case HCI_BREDR:
2204 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2205 break;
2206 case HCI_AMP:
2207 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2208 break;
2209 default:
2210 return -EINVAL;
2211 }
2212
2213 if (id < 0)
2214 return id;
2215
2216 sprintf(hdev->name, "hci%d", id);
2217 hdev->id = id;
2218
2219 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2220
2221 write_lock(&hci_dev_list_lock);
2222 list_add(&hdev->list, &hci_dev_list);
2223 write_unlock(&hci_dev_list_lock);
2224
2225 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
2226 WQ_MEM_RECLAIM, 1);
2227 if (!hdev->workqueue) {
2228 error = -ENOMEM;
2229 goto err;
2230 }
2231
2232 hdev->req_workqueue = alloc_workqueue(hdev->name,
2233 WQ_HIGHPRI | WQ_UNBOUND |
2234 WQ_MEM_RECLAIM, 1);
2235 if (!hdev->req_workqueue) {
2236 destroy_workqueue(hdev->workqueue);
2237 error = -ENOMEM;
2238 goto err;
2239 }
2240
2241 error = hci_add_sysfs(hdev);
2242 if (error < 0)
2243 goto err_wqueue;
2244
2245 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2246 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2247 hdev);
2248 if (hdev->rfkill) {
2249 if (rfkill_register(hdev->rfkill) < 0) {
2250 rfkill_destroy(hdev->rfkill);
2251 hdev->rfkill = NULL;
2252 }
2253 }
2254
2255 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2256 set_bit(HCI_RFKILLED, &hdev->dev_flags);
2257
2258 set_bit(HCI_SETUP, &hdev->dev_flags);
2259
2260 if (hdev->dev_type != HCI_AMP)
2261 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2262
2263 hci_notify(hdev, HCI_DEV_REG);
2264 hci_dev_hold(hdev);
2265
2266 queue_work(hdev->req_workqueue, &hdev->power_on);
2267
2268 return id;
2269
2270err_wqueue:
2271 destroy_workqueue(hdev->workqueue);
2272 destroy_workqueue(hdev->req_workqueue);
2273err:
2274 ida_simple_remove(&hci_index_ida, hdev->id);
2275 write_lock(&hci_dev_list_lock);
2276 list_del(&hdev->list);
2277 write_unlock(&hci_dev_list_lock);
2278
2279 return error;
2280}
2281EXPORT_SYMBOL(hci_register_dev);
2282
2283/* Unregister HCI device */
2284void hci_unregister_dev(struct hci_dev *hdev)
2285{
2286 int i, id;
2287
2288 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2289
2290 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2291
2292 id = hdev->id;
2293
2294 write_lock(&hci_dev_list_lock);
2295 list_del(&hdev->list);
2296 write_unlock(&hci_dev_list_lock);
2297
2298 hci_dev_do_close(hdev);
2299
2300 for (i = 0; i < NUM_REASSEMBLY; i++)
2301 kfree_skb(hdev->reassembly[i]);
2302
2303 cancel_work_sync(&hdev->power_on);
2304
2305 if (!test_bit(HCI_INIT, &hdev->flags) &&
2306 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
2307 hci_dev_lock(hdev);
2308 mgmt_index_removed(hdev);
2309 hci_dev_unlock(hdev);
2310 }
2311
2312 /* mgmt_index_removed should take care of emptying the
2313 * pending list */
2314 BUG_ON(!list_empty(&hdev->mgmt_pending));
2315
2316 hci_notify(hdev, HCI_DEV_UNREG);
2317
2318 if (hdev->rfkill) {
2319 rfkill_unregister(hdev->rfkill);
2320 rfkill_destroy(hdev->rfkill);
2321 }
2322
2323 hci_del_sysfs(hdev);
2324
2325 destroy_workqueue(hdev->workqueue);
2326 destroy_workqueue(hdev->req_workqueue);
2327
2328 hci_dev_lock(hdev);
2329 hci_blacklist_clear(hdev);
2330 hci_uuids_clear(hdev);
2331 hci_link_keys_clear(hdev);
2332 hci_smp_ltks_clear(hdev);
2333 hci_remote_oob_data_clear(hdev);
2334 hci_dev_unlock(hdev);
2335
2336 hci_dev_put(hdev);
2337
2338 ida_simple_remove(&hci_index_ida, id);
2339}
2340EXPORT_SYMBOL(hci_unregister_dev);
2341
2342/* Suspend HCI device */
2343int hci_suspend_dev(struct hci_dev *hdev)
2344{
2345 hci_notify(hdev, HCI_DEV_SUSPEND);
2346 return 0;
2347}
2348EXPORT_SYMBOL(hci_suspend_dev);
2349
2350/* Resume HCI device */
2351int hci_resume_dev(struct hci_dev *hdev)
2352{
2353 hci_notify(hdev, HCI_DEV_RESUME);
2354 return 0;
2355}
2356EXPORT_SYMBOL(hci_resume_dev);
2357
2358/* Receive frame from HCI drivers */
2359int hci_recv_frame(struct sk_buff *skb)
2360{
2361 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2362 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2363 && !test_bit(HCI_INIT, &hdev->flags))) {
2364 kfree_skb(skb);
2365 return -ENXIO;
2366 }
2367
2368 /* Incoming skb */
2369 bt_cb(skb)->incoming = 1;
2370
2371 /* Time stamp */
2372 __net_timestamp(skb);
2373
2374 skb_queue_tail(&hdev->rx_q, skb);
2375 queue_work(hdev->workqueue, &hdev->rx_work);
2376
2377 return 0;
2378}
2379EXPORT_SYMBOL(hci_recv_frame);
2380
2381static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
2382 int count, __u8 index)
2383{
2384 int len = 0;
2385 int hlen = 0;
2386 int remain = count;
2387 struct sk_buff *skb;
2388 struct bt_skb_cb *scb;
2389
2390 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
2391 index >= NUM_REASSEMBLY)
2392 return -EILSEQ;
2393
2394 skb = hdev->reassembly[index];
2395
2396 if (!skb) {
2397 switch (type) {
2398 case HCI_ACLDATA_PKT:
2399 len = HCI_MAX_FRAME_SIZE;
2400 hlen = HCI_ACL_HDR_SIZE;
2401 break;
2402 case HCI_EVENT_PKT:
2403 len = HCI_MAX_EVENT_SIZE;
2404 hlen = HCI_EVENT_HDR_SIZE;
2405 break;
2406 case HCI_SCODATA_PKT:
2407 len = HCI_MAX_SCO_SIZE;
2408 hlen = HCI_SCO_HDR_SIZE;
2409 break;
2410 }
2411
2412 skb = bt_skb_alloc(len, GFP_ATOMIC);
2413 if (!skb)
2414 return -ENOMEM;
2415
2416 scb = (void *) skb->cb;
2417 scb->expect = hlen;
2418 scb->pkt_type = type;
2419
2420 skb->dev = (void *) hdev;
2421 hdev->reassembly[index] = skb;
2422 }
2423
2424 while (count) {
2425 scb = (void *) skb->cb;
2426 len = min_t(uint, scb->expect, count);
2427
2428 memcpy(skb_put(skb, len), data, len);
2429
2430 count -= len;
2431 data += len;
2432 scb->expect -= len;
2433 remain = count;
2434
2435 switch (type) {
2436 case HCI_EVENT_PKT:
2437 if (skb->len == HCI_EVENT_HDR_SIZE) {
2438 struct hci_event_hdr *h = hci_event_hdr(skb);
2439 scb->expect = h->plen;
2440
2441 if (skb_tailroom(skb) < scb->expect) {
2442 kfree_skb(skb);
2443 hdev->reassembly[index] = NULL;
2444 return -ENOMEM;
2445 }
2446 }
2447 break;
2448
2449 case HCI_ACLDATA_PKT:
2450 if (skb->len == HCI_ACL_HDR_SIZE) {
2451 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2452 scb->expect = __le16_to_cpu(h->dlen);
2453
2454 if (skb_tailroom(skb) < scb->expect) {
2455 kfree_skb(skb);
2456 hdev->reassembly[index] = NULL;
2457 return -ENOMEM;
2458 }
2459 }
2460 break;
2461
2462 case HCI_SCODATA_PKT:
2463 if (skb->len == HCI_SCO_HDR_SIZE) {
2464 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2465 scb->expect = h->dlen;
2466
2467 if (skb_tailroom(skb) < scb->expect) {
2468 kfree_skb(skb);
2469 hdev->reassembly[index] = NULL;
2470 return -ENOMEM;
2471 }
2472 }
2473 break;
2474 }
2475
2476 if (scb->expect == 0) {
2477 /* Complete frame */
2478
2479 bt_cb(skb)->pkt_type = type;
2480 hci_recv_frame(skb);
2481
2482 hdev->reassembly[index] = NULL;
2483 return remain;
2484 }
2485 }
2486
2487 return remain;
2488}
2489
2490int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2491{
2492 int rem = 0;
2493
2494 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2495 return -EILSEQ;
2496
2497 while (count) {
2498 rem = hci_reassembly(hdev, type, data, count, type - 1);
2499 if (rem < 0)
2500 return rem;
2501
2502 data += (count - rem);
2503 count = rem;
2504 }
2505
2506 return rem;
2507}
2508EXPORT_SYMBOL(hci_recv_fragment);
2509
2510#define STREAM_REASSEMBLY 0
2511
2512int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2513{
2514 int type;
2515 int rem = 0;
2516
2517 while (count) {
2518 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2519
2520 if (!skb) {
2521 struct { char type; } *pkt;
2522
2523 /* Start of the frame */
2524 pkt = data;
2525 type = pkt->type;
2526
2527 data++;
2528 count--;
2529 } else
2530 type = bt_cb(skb)->pkt_type;
2531
2532 rem = hci_reassembly(hdev, type, data, count,
2533 STREAM_REASSEMBLY);
2534 if (rem < 0)
2535 return rem;
2536
2537 data += (count - rem);
2538 count = rem;
2539 }
2540
2541 return rem;
2542}
2543EXPORT_SYMBOL(hci_recv_stream_fragment);
2544
2545/* ---- Interface to upper protocols ---- */
2546
2547int hci_register_cb(struct hci_cb *cb)
2548{
2549 BT_DBG("%p name %s", cb, cb->name);
2550
2551 write_lock(&hci_cb_list_lock);
2552 list_add(&cb->list, &hci_cb_list);
2553 write_unlock(&hci_cb_list_lock);
2554
2555 return 0;
2556}
2557EXPORT_SYMBOL(hci_register_cb);
2558
2559int hci_unregister_cb(struct hci_cb *cb)
2560{
2561 BT_DBG("%p name %s", cb, cb->name);
2562
2563 write_lock(&hci_cb_list_lock);
2564 list_del(&cb->list);
2565 write_unlock(&hci_cb_list_lock);
2566
2567 return 0;
2568}
2569EXPORT_SYMBOL(hci_unregister_cb);
2570
2571static int hci_send_frame(struct sk_buff *skb)
2572{
2573 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2574
2575 if (!hdev) {
2576 kfree_skb(skb);
2577 return -ENODEV;
2578 }
2579
2580 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2581
2582 /* Time stamp */
2583 __net_timestamp(skb);
2584
2585 /* Send copy to monitor */
2586 hci_send_to_monitor(hdev, skb);
2587
2588 if (atomic_read(&hdev->promisc)) {
2589 /* Send copy to the sockets */
2590 hci_send_to_sock(hdev, skb);
2591 }
2592
2593 /* Get rid of skb owner, prior to sending to the driver. */
2594 skb_orphan(skb);
2595
2596 return hdev->send(skb);
2597}
2598
2599void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2600{
2601 skb_queue_head_init(&req->cmd_q);
2602 req->hdev = hdev;
2603 req->err = 0;
2604}
2605
2606int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2607{
2608 struct hci_dev *hdev = req->hdev;
2609 struct sk_buff *skb;
2610 unsigned long flags;
2611
2612 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2613
2614 /* If an error occured during request building, remove all HCI
2615 * commands queued on the HCI request queue.
2616 */
2617 if (req->err) {
2618 skb_queue_purge(&req->cmd_q);
2619 return req->err;
2620 }
2621
2622 /* Do not allow empty requests */
2623 if (skb_queue_empty(&req->cmd_q))
2624 return -ENODATA;
2625
2626 skb = skb_peek_tail(&req->cmd_q);
2627 bt_cb(skb)->req.complete = complete;
2628
2629 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2630 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2631 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2632
2633 queue_work(hdev->workqueue, &hdev->cmd_work);
2634
2635 return 0;
2636}
2637
2638static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
2639 u32 plen, const void *param)
2640{
2641 int len = HCI_COMMAND_HDR_SIZE + plen;
2642 struct hci_command_hdr *hdr;
2643 struct sk_buff *skb;
2644
2645 skb = bt_skb_alloc(len, GFP_ATOMIC);
2646 if (!skb)
2647 return NULL;
2648
2649 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2650 hdr->opcode = cpu_to_le16(opcode);
2651 hdr->plen = plen;
2652
2653 if (plen)
2654 memcpy(skb_put(skb, plen), param, plen);
2655
2656 BT_DBG("skb len %d", skb->len);
2657
2658 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2659 skb->dev = (void *) hdev;
2660
2661 return skb;
2662}
2663
2664/* Send HCI command */
2665int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2666 const void *param)
2667{
2668 struct sk_buff *skb;
2669
2670 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2671
2672 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2673 if (!skb) {
2674 BT_ERR("%s no memory for command", hdev->name);
2675 return -ENOMEM;
2676 }
2677
2678 /* Stand-alone HCI commands must be flaged as
2679 * single-command requests.
2680 */
2681 bt_cb(skb)->req.start = true;
2682
2683 skb_queue_tail(&hdev->cmd_q, skb);
2684 queue_work(hdev->workqueue, &hdev->cmd_work);
2685
2686 return 0;
2687}
2688
2689/* Queue a command to an asynchronous HCI request */
2690void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2691 const void *param, u8 event)
2692{
2693 struct hci_dev *hdev = req->hdev;
2694 struct sk_buff *skb;
2695
2696 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2697
2698 /* If an error occured during request building, there is no point in
2699 * queueing the HCI command. We can simply return.
2700 */
2701 if (req->err)
2702 return;
2703
2704 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2705 if (!skb) {
2706 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2707 hdev->name, opcode);
2708 req->err = -ENOMEM;
2709 return;
2710 }
2711
2712 if (skb_queue_empty(&req->cmd_q))
2713 bt_cb(skb)->req.start = true;
2714
2715 bt_cb(skb)->req.event = event;
2716
2717 skb_queue_tail(&req->cmd_q, skb);
2718}
2719
2720void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2721 const void *param)
2722{
2723 hci_req_add_ev(req, opcode, plen, param, 0);
2724}
2725
2726/* Get data from the previously sent command */
2727void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2728{
2729 struct hci_command_hdr *hdr;
2730
2731 if (!hdev->sent_cmd)
2732 return NULL;
2733
2734 hdr = (void *) hdev->sent_cmd->data;
2735
2736 if (hdr->opcode != cpu_to_le16(opcode))
2737 return NULL;
2738
2739 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
2740
2741 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2742}
2743
2744/* Send ACL data */
2745static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2746{
2747 struct hci_acl_hdr *hdr;
2748 int len = skb->len;
2749
2750 skb_push(skb, HCI_ACL_HDR_SIZE);
2751 skb_reset_transport_header(skb);
2752 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2753 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2754 hdr->dlen = cpu_to_le16(len);
2755}
2756
2757static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
2758 struct sk_buff *skb, __u16 flags)
2759{
2760 struct hci_conn *conn = chan->conn;
2761 struct hci_dev *hdev = conn->hdev;
2762 struct sk_buff *list;
2763
2764 skb->len = skb_headlen(skb);
2765 skb->data_len = 0;
2766
2767 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2768
2769 switch (hdev->dev_type) {
2770 case HCI_BREDR:
2771 hci_add_acl_hdr(skb, conn->handle, flags);
2772 break;
2773 case HCI_AMP:
2774 hci_add_acl_hdr(skb, chan->handle, flags);
2775 break;
2776 default:
2777 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2778 return;
2779 }
2780
2781 list = skb_shinfo(skb)->frag_list;
2782 if (!list) {
2783 /* Non fragmented */
2784 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2785
2786 skb_queue_tail(queue, skb);
2787 } else {
2788 /* Fragmented */
2789 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2790
2791 skb_shinfo(skb)->frag_list = NULL;
2792
2793 /* Queue all fragments atomically */
2794 spin_lock(&queue->lock);
2795
2796 __skb_queue_tail(queue, skb);
2797
2798 flags &= ~ACL_START;
2799 flags |= ACL_CONT;
2800 do {
2801 skb = list; list = list->next;
2802
2803 skb->dev = (void *) hdev;
2804 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2805 hci_add_acl_hdr(skb, conn->handle, flags);
2806
2807 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2808
2809 __skb_queue_tail(queue, skb);
2810 } while (list);
2811
2812 spin_unlock(&queue->lock);
2813 }
2814}
2815
2816void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2817{
2818 struct hci_dev *hdev = chan->conn->hdev;
2819
2820 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
2821
2822 skb->dev = (void *) hdev;
2823
2824 hci_queue_acl(chan, &chan->data_q, skb, flags);
2825
2826 queue_work(hdev->workqueue, &hdev->tx_work);
2827}
2828
2829/* Send SCO data */
2830void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2831{
2832 struct hci_dev *hdev = conn->hdev;
2833 struct hci_sco_hdr hdr;
2834
2835 BT_DBG("%s len %d", hdev->name, skb->len);
2836
2837 hdr.handle = cpu_to_le16(conn->handle);
2838 hdr.dlen = skb->len;
2839
2840 skb_push(skb, HCI_SCO_HDR_SIZE);
2841 skb_reset_transport_header(skb);
2842 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2843
2844 skb->dev = (void *) hdev;
2845 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2846
2847 skb_queue_tail(&conn->data_q, skb);
2848 queue_work(hdev->workqueue, &hdev->tx_work);
2849}
2850
2851/* ---- HCI TX task (outgoing data) ---- */
2852
2853/* HCI Connection scheduler */
2854static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2855 int *quote)
2856{
2857 struct hci_conn_hash *h = &hdev->conn_hash;
2858 struct hci_conn *conn = NULL, *c;
2859 unsigned int num = 0, min = ~0;
2860
2861 /* We don't have to lock device here. Connections are always
2862 * added and removed with TX task disabled. */
2863
2864 rcu_read_lock();
2865
2866 list_for_each_entry_rcu(c, &h->list, list) {
2867 if (c->type != type || skb_queue_empty(&c->data_q))
2868 continue;
2869
2870 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2871 continue;
2872
2873 num++;
2874
2875 if (c->sent < min) {
2876 min = c->sent;
2877 conn = c;
2878 }
2879
2880 if (hci_conn_num(hdev, type) == num)
2881 break;
2882 }
2883
2884 rcu_read_unlock();
2885
2886 if (conn) {
2887 int cnt, q;
2888
2889 switch (conn->type) {
2890 case ACL_LINK:
2891 cnt = hdev->acl_cnt;
2892 break;
2893 case SCO_LINK:
2894 case ESCO_LINK:
2895 cnt = hdev->sco_cnt;
2896 break;
2897 case LE_LINK:
2898 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2899 break;
2900 default:
2901 cnt = 0;
2902 BT_ERR("Unknown link type");
2903 }
2904
2905 q = cnt / num;
2906 *quote = q ? q : 1;
2907 } else
2908 *quote = 0;
2909
2910 BT_DBG("conn %p quote %d", conn, *quote);
2911 return conn;
2912}
2913
2914static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2915{
2916 struct hci_conn_hash *h = &hdev->conn_hash;
2917 struct hci_conn *c;
2918
2919 BT_ERR("%s link tx timeout", hdev->name);
2920
2921 rcu_read_lock();
2922
2923 /* Kill stalled connections */
2924 list_for_each_entry_rcu(c, &h->list, list) {
2925 if (c->type == type && c->sent) {
2926 BT_ERR("%s killing stalled connection %pMR",
2927 hdev->name, &c->dst);
2928 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
2929 }
2930 }
2931
2932 rcu_read_unlock();
2933}
2934
2935static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2936 int *quote)
2937{
2938 struct hci_conn_hash *h = &hdev->conn_hash;
2939 struct hci_chan *chan = NULL;
2940 unsigned int num = 0, min = ~0, cur_prio = 0;
2941 struct hci_conn *conn;
2942 int cnt, q, conn_num = 0;
2943
2944 BT_DBG("%s", hdev->name);
2945
2946 rcu_read_lock();
2947
2948 list_for_each_entry_rcu(conn, &h->list, list) {
2949 struct hci_chan *tmp;
2950
2951 if (conn->type != type)
2952 continue;
2953
2954 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2955 continue;
2956
2957 conn_num++;
2958
2959 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2960 struct sk_buff *skb;
2961
2962 if (skb_queue_empty(&tmp->data_q))
2963 continue;
2964
2965 skb = skb_peek(&tmp->data_q);
2966 if (skb->priority < cur_prio)
2967 continue;
2968
2969 if (skb->priority > cur_prio) {
2970 num = 0;
2971 min = ~0;
2972 cur_prio = skb->priority;
2973 }
2974
2975 num++;
2976
2977 if (conn->sent < min) {
2978 min = conn->sent;
2979 chan = tmp;
2980 }
2981 }
2982
2983 if (hci_conn_num(hdev, type) == conn_num)
2984 break;
2985 }
2986
2987 rcu_read_unlock();
2988
2989 if (!chan)
2990 return NULL;
2991
2992 switch (chan->conn->type) {
2993 case ACL_LINK:
2994 cnt = hdev->acl_cnt;
2995 break;
2996 case AMP_LINK:
2997 cnt = hdev->block_cnt;
2998 break;
2999 case SCO_LINK:
3000 case ESCO_LINK:
3001 cnt = hdev->sco_cnt;
3002 break;
3003 case LE_LINK:
3004 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3005 break;
3006 default:
3007 cnt = 0;
3008 BT_ERR("Unknown link type");
3009 }
3010
3011 q = cnt / num;
3012 *quote = q ? q : 1;
3013 BT_DBG("chan %p quote %d", chan, *quote);
3014 return chan;
3015}
3016
3017static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3018{
3019 struct hci_conn_hash *h = &hdev->conn_hash;
3020 struct hci_conn *conn;
3021 int num = 0;
3022
3023 BT_DBG("%s", hdev->name);
3024
3025 rcu_read_lock();
3026
3027 list_for_each_entry_rcu(conn, &h->list, list) {
3028 struct hci_chan *chan;
3029
3030 if (conn->type != type)
3031 continue;
3032
3033 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3034 continue;
3035
3036 num++;
3037
3038 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3039 struct sk_buff *skb;
3040
3041 if (chan->sent) {
3042 chan->sent = 0;
3043 continue;
3044 }
3045
3046 if (skb_queue_empty(&chan->data_q))
3047 continue;
3048
3049 skb = skb_peek(&chan->data_q);
3050 if (skb->priority >= HCI_PRIO_MAX - 1)
3051 continue;
3052
3053 skb->priority = HCI_PRIO_MAX - 1;
3054
3055 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3056 skb->priority);
3057 }
3058
3059 if (hci_conn_num(hdev, type) == num)
3060 break;
3061 }
3062
3063 rcu_read_unlock();
3064
3065}
3066
3067static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3068{
3069 /* Calculate count of blocks used by this packet */
3070 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3071}
3072
3073static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3074{
3075 if (!test_bit(HCI_RAW, &hdev->flags)) {
3076 /* ACL tx timeout must be longer than maximum
3077 * link supervision timeout (40.9 seconds) */
3078 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3079 HCI_ACL_TX_TIMEOUT))
3080 hci_link_tx_to(hdev, ACL_LINK);
3081 }
3082}
3083
3084static void hci_sched_acl_pkt(struct hci_dev *hdev)
3085{
3086 unsigned int cnt = hdev->acl_cnt;
3087 struct hci_chan *chan;
3088 struct sk_buff *skb;
3089 int quote;
3090
3091 __check_timeout(hdev, cnt);
3092
3093 while (hdev->acl_cnt &&
3094 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
3095 u32 priority = (skb_peek(&chan->data_q))->priority;
3096 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3097 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3098 skb->len, skb->priority);
3099
3100 /* Stop if priority has changed */
3101 if (skb->priority < priority)
3102 break;
3103
3104 skb = skb_dequeue(&chan->data_q);
3105
3106 hci_conn_enter_active_mode(chan->conn,
3107 bt_cb(skb)->force_active);
3108
3109 hci_send_frame(skb);
3110 hdev->acl_last_tx = jiffies;
3111
3112 hdev->acl_cnt--;
3113 chan->sent++;
3114 chan->conn->sent++;
3115 }
3116 }
3117
3118 if (cnt != hdev->acl_cnt)
3119 hci_prio_recalculate(hdev, ACL_LINK);
3120}
3121
3122static void hci_sched_acl_blk(struct hci_dev *hdev)
3123{
3124 unsigned int cnt = hdev->block_cnt;
3125 struct hci_chan *chan;
3126 struct sk_buff *skb;
3127 int quote;
3128 u8 type;
3129
3130 __check_timeout(hdev, cnt);
3131
3132 BT_DBG("%s", hdev->name);
3133
3134 if (hdev->dev_type == HCI_AMP)
3135 type = AMP_LINK;
3136 else
3137 type = ACL_LINK;
3138
3139 while (hdev->block_cnt > 0 &&
3140 (chan = hci_chan_sent(hdev, type, &quote))) {
3141 u32 priority = (skb_peek(&chan->data_q))->priority;
3142 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3143 int blocks;
3144
3145 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3146 skb->len, skb->priority);
3147
3148 /* Stop if priority has changed */
3149 if (skb->priority < priority)
3150 break;
3151
3152 skb = skb_dequeue(&chan->data_q);
3153
3154 blocks = __get_blocks(hdev, skb);
3155 if (blocks > hdev->block_cnt)
3156 return;
3157
3158 hci_conn_enter_active_mode(chan->conn,
3159 bt_cb(skb)->force_active);
3160
3161 hci_send_frame(skb);
3162 hdev->acl_last_tx = jiffies;
3163
3164 hdev->block_cnt -= blocks;
3165 quote -= blocks;
3166
3167 chan->sent += blocks;
3168 chan->conn->sent += blocks;
3169 }
3170 }
3171
3172 if (cnt != hdev->block_cnt)
3173 hci_prio_recalculate(hdev, type);
3174}
3175
3176static void hci_sched_acl(struct hci_dev *hdev)
3177{
3178 BT_DBG("%s", hdev->name);
3179
3180 /* No ACL link over BR/EDR controller */
3181 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3182 return;
3183
3184 /* No AMP link over AMP controller */
3185 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3186 return;
3187
3188 switch (hdev->flow_ctl_mode) {
3189 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3190 hci_sched_acl_pkt(hdev);
3191 break;
3192
3193 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3194 hci_sched_acl_blk(hdev);
3195 break;
3196 }
3197}
3198
3199/* Schedule SCO */
3200static void hci_sched_sco(struct hci_dev *hdev)
3201{
3202 struct hci_conn *conn;
3203 struct sk_buff *skb;
3204 int quote;
3205
3206 BT_DBG("%s", hdev->name);
3207
3208 if (!hci_conn_num(hdev, SCO_LINK))
3209 return;
3210
3211 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3212 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3213 BT_DBG("skb %p len %d", skb, skb->len);
3214 hci_send_frame(skb);
3215
3216 conn->sent++;
3217 if (conn->sent == ~0)
3218 conn->sent = 0;
3219 }
3220 }
3221}
3222
3223static void hci_sched_esco(struct hci_dev *hdev)
3224{
3225 struct hci_conn *conn;
3226 struct sk_buff *skb;
3227 int quote;
3228
3229 BT_DBG("%s", hdev->name);
3230
3231 if (!hci_conn_num(hdev, ESCO_LINK))
3232 return;
3233
3234 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3235 &quote))) {
3236 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3237 BT_DBG("skb %p len %d", skb, skb->len);
3238 hci_send_frame(skb);
3239
3240 conn->sent++;
3241 if (conn->sent == ~0)
3242 conn->sent = 0;
3243 }
3244 }
3245}
3246
3247static void hci_sched_le(struct hci_dev *hdev)
3248{
3249 struct hci_chan *chan;
3250 struct sk_buff *skb;
3251 int quote, cnt, tmp;
3252
3253 BT_DBG("%s", hdev->name);
3254
3255 if (!hci_conn_num(hdev, LE_LINK))
3256 return;
3257
3258 if (!test_bit(HCI_RAW, &hdev->flags)) {
3259 /* LE tx timeout must be longer than maximum
3260 * link supervision timeout (40.9 seconds) */
3261 if (!hdev->le_cnt && hdev->le_pkts &&
3262 time_after(jiffies, hdev->le_last_tx + HZ * 45))
3263 hci_link_tx_to(hdev, LE_LINK);
3264 }
3265
3266 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3267 tmp = cnt;
3268 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
3269 u32 priority = (skb_peek(&chan->data_q))->priority;
3270 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3271 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3272 skb->len, skb->priority);
3273
3274 /* Stop if priority has changed */
3275 if (skb->priority < priority)
3276 break;
3277
3278 skb = skb_dequeue(&chan->data_q);
3279
3280 hci_send_frame(skb);
3281 hdev->le_last_tx = jiffies;
3282
3283 cnt--;
3284 chan->sent++;
3285 chan->conn->sent++;
3286 }
3287 }
3288
3289 if (hdev->le_pkts)
3290 hdev->le_cnt = cnt;
3291 else
3292 hdev->acl_cnt = cnt;
3293
3294 if (cnt != tmp)
3295 hci_prio_recalculate(hdev, LE_LINK);
3296}
3297
3298static void hci_tx_work(struct work_struct *work)
3299{
3300 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3301 struct sk_buff *skb;
3302
3303 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
3304 hdev->sco_cnt, hdev->le_cnt);
3305
3306 /* Schedule queues and send stuff to HCI driver */
3307
3308 hci_sched_acl(hdev);
3309
3310 hci_sched_sco(hdev);
3311
3312 hci_sched_esco(hdev);
3313
3314 hci_sched_le(hdev);
3315
3316 /* Send next queued raw (unknown type) packet */
3317 while ((skb = skb_dequeue(&hdev->raw_q)))
3318 hci_send_frame(skb);
3319}
3320
3321/* ----- HCI RX task (incoming data processing) ----- */
3322
3323/* ACL data packet */
3324static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3325{
3326 struct hci_acl_hdr *hdr = (void *) skb->data;
3327 struct hci_conn *conn;
3328 __u16 handle, flags;
3329
3330 skb_pull(skb, HCI_ACL_HDR_SIZE);
3331
3332 handle = __le16_to_cpu(hdr->handle);
3333 flags = hci_flags(handle);
3334 handle = hci_handle(handle);
3335
3336 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3337 handle, flags);
3338
3339 hdev->stat.acl_rx++;
3340
3341 hci_dev_lock(hdev);
3342 conn = hci_conn_hash_lookup_handle(hdev, handle);
3343 hci_dev_unlock(hdev);
3344
3345 if (conn) {
3346 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3347
3348 /* Send to upper protocol */
3349 l2cap_recv_acldata(conn, skb, flags);
3350 return;
3351 } else {
3352 BT_ERR("%s ACL packet for unknown connection handle %d",
3353 hdev->name, handle);
3354 }
3355
3356 kfree_skb(skb);
3357}
3358
3359/* SCO data packet */
3360static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3361{
3362 struct hci_sco_hdr *hdr = (void *) skb->data;
3363 struct hci_conn *conn;
3364 __u16 handle;
3365
3366 skb_pull(skb, HCI_SCO_HDR_SIZE);
3367
3368 handle = __le16_to_cpu(hdr->handle);
3369
3370 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
3371
3372 hdev->stat.sco_rx++;
3373
3374 hci_dev_lock(hdev);
3375 conn = hci_conn_hash_lookup_handle(hdev, handle);
3376 hci_dev_unlock(hdev);
3377
3378 if (conn) {
3379 /* Send to upper protocol */
3380 sco_recv_scodata(conn, skb);
3381 return;
3382 } else {
3383 BT_ERR("%s SCO packet for unknown connection handle %d",
3384 hdev->name, handle);
3385 }
3386
3387 kfree_skb(skb);
3388}
3389
3390static bool hci_req_is_complete(struct hci_dev *hdev)
3391{
3392 struct sk_buff *skb;
3393
3394 skb = skb_peek(&hdev->cmd_q);
3395 if (!skb)
3396 return true;
3397
3398 return bt_cb(skb)->req.start;
3399}
3400
3401static void hci_resend_last(struct hci_dev *hdev)
3402{
3403 struct hci_command_hdr *sent;
3404 struct sk_buff *skb;
3405 u16 opcode;
3406
3407 if (!hdev->sent_cmd)
3408 return;
3409
3410 sent = (void *) hdev->sent_cmd->data;
3411 opcode = __le16_to_cpu(sent->opcode);
3412 if (opcode == HCI_OP_RESET)
3413 return;
3414
3415 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3416 if (!skb)
3417 return;
3418
3419 skb_queue_head(&hdev->cmd_q, skb);
3420 queue_work(hdev->workqueue, &hdev->cmd_work);
3421}
3422
3423void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3424{
3425 hci_req_complete_t req_complete = NULL;
3426 struct sk_buff *skb;
3427 unsigned long flags;
3428
3429 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3430
3431 /* If the completed command doesn't match the last one that was
3432 * sent we need to do special handling of it.
3433 */
3434 if (!hci_sent_cmd_data(hdev, opcode)) {
3435 /* Some CSR based controllers generate a spontaneous
3436 * reset complete event during init and any pending
3437 * command will never be completed. In such a case we
3438 * need to resend whatever was the last sent
3439 * command.
3440 */
3441 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3442 hci_resend_last(hdev);
3443
3444 return;
3445 }
3446
3447 /* If the command succeeded and there's still more commands in
3448 * this request the request is not yet complete.
3449 */
3450 if (!status && !hci_req_is_complete(hdev))
3451 return;
3452
3453 /* If this was the last command in a request the complete
3454 * callback would be found in hdev->sent_cmd instead of the
3455 * command queue (hdev->cmd_q).
3456 */
3457 if (hdev->sent_cmd) {
3458 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
3459 if (req_complete)
3460 goto call_complete;
3461 }
3462
3463 /* Remove all pending commands belonging to this request */
3464 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3465 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3466 if (bt_cb(skb)->req.start) {
3467 __skb_queue_head(&hdev->cmd_q, skb);
3468 break;
3469 }
3470
3471 req_complete = bt_cb(skb)->req.complete;
3472 kfree_skb(skb);
3473 }
3474 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3475
3476call_complete:
3477 if (req_complete)
3478 req_complete(hdev, status);
3479}
3480
3481static void hci_rx_work(struct work_struct *work)
3482{
3483 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
3484 struct sk_buff *skb;
3485
3486 BT_DBG("%s", hdev->name);
3487
3488 while ((skb = skb_dequeue(&hdev->rx_q))) {
3489 /* Send copy to monitor */
3490 hci_send_to_monitor(hdev, skb);
3491
3492 if (atomic_read(&hdev->promisc)) {
3493 /* Send copy to the sockets */
3494 hci_send_to_sock(hdev, skb);
3495 }
3496
3497 if (test_bit(HCI_RAW, &hdev->flags)) {
3498 kfree_skb(skb);
3499 continue;
3500 }
3501
3502 if (test_bit(HCI_INIT, &hdev->flags)) {
3503 /* Don't process data packets in this states. */
3504 switch (bt_cb(skb)->pkt_type) {
3505 case HCI_ACLDATA_PKT:
3506 case HCI_SCODATA_PKT:
3507 kfree_skb(skb);
3508 continue;
3509 }
3510 }
3511
3512 /* Process frame */
3513 switch (bt_cb(skb)->pkt_type) {
3514 case HCI_EVENT_PKT:
3515 BT_DBG("%s Event packet", hdev->name);
3516 hci_event_packet(hdev, skb);
3517 break;
3518
3519 case HCI_ACLDATA_PKT:
3520 BT_DBG("%s ACL data packet", hdev->name);
3521 hci_acldata_packet(hdev, skb);
3522 break;
3523
3524 case HCI_SCODATA_PKT:
3525 BT_DBG("%s SCO data packet", hdev->name);
3526 hci_scodata_packet(hdev, skb);
3527 break;
3528
3529 default:
3530 kfree_skb(skb);
3531 break;
3532 }
3533 }
3534}
3535
3536static void hci_cmd_work(struct work_struct *work)
3537{
3538 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
3539 struct sk_buff *skb;
3540
3541 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3542 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
3543
3544 /* Send queued commands */
3545 if (atomic_read(&hdev->cmd_cnt)) {
3546 skb = skb_dequeue(&hdev->cmd_q);
3547 if (!skb)
3548 return;
3549
3550 kfree_skb(hdev->sent_cmd);
3551
3552 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3553 if (hdev->sent_cmd) {
3554 atomic_dec(&hdev->cmd_cnt);
3555 hci_send_frame(skb);
3556 if (test_bit(HCI_RESET, &hdev->flags))
3557 del_timer(&hdev->cmd_timer);
3558 else
3559 mod_timer(&hdev->cmd_timer,
3560 jiffies + HCI_CMD_TIMEOUT);
3561 } else {
3562 skb_queue_head(&hdev->cmd_q, skb);
3563 queue_work(hdev->workqueue, &hdev->cmd_work);
3564 }
3565 }
3566}
3567
3568int hci_do_inquiry(struct hci_dev *hdev, u8 length)
3569{
3570 /* General inquiry access code (GIAC) */
3571 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3572 struct hci_cp_inquiry cp;
3573
3574 BT_DBG("%s", hdev->name);
3575
3576 if (test_bit(HCI_INQUIRY, &hdev->flags))
3577 return -EINPROGRESS;
3578
3579 inquiry_cache_flush(hdev);
3580
3581 memset(&cp, 0, sizeof(cp));
3582 memcpy(&cp.lap, lap, sizeof(cp.lap));
3583 cp.length = length;
3584
3585 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
3586}
3587
3588int hci_cancel_inquiry(struct hci_dev *hdev)
3589{
3590 BT_DBG("%s", hdev->name);
3591
3592 if (!test_bit(HCI_INQUIRY, &hdev->flags))
3593 return -EALREADY;
3594
3595 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
3596}
3597
3598u8 bdaddr_to_le(u8 bdaddr_type)
3599{
3600 switch (bdaddr_type) {
3601 case BDADDR_LE_PUBLIC:
3602 return ADDR_LE_DEV_PUBLIC;
3603
3604 default:
3605 /* Fallback to LE Random address type */
3606 return ADDR_LE_DEV_RANDOM;
3607 }
3608}
kernel source for telekom puls (alcatel/mediatek)