Merge tag 'v3.10.55' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
1da177e4 30
8c520a59 31#include <linux/rfkill.h>
1da177e4
LT
32
33#include <net/bluetooth/bluetooth.h>
34#include <net/bluetooth/hci_core.h>
35
b78752cc 36static void hci_rx_work(struct work_struct *work);
c347b765 37static void hci_cmd_work(struct work_struct *work);
3eff45ea 38static void hci_tx_work(struct work_struct *work);
1da177e4 39
1da177e4
LT
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
3df92b31
SL
48/* HCI ID Numbering */
49static DEFINE_IDA(hci_index_ida);
50
1da177e4
LT
51/* ---- HCI notifications ---- */
52
6516455d 53static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 54{
040030ef 55 hci_sock_dev_event(hdev, event);
1da177e4
LT
56}
57
58/* ---- HCI requests ---- */
59
42c6b129 60static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1da177e4 61{
42c6b129 62 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT
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
77a63e0a
FW
82static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
83 u8 event)
75e84b7c
JH
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
7b1abbbe
JH
107 if (event) {
108 if (hdr->evt != event)
109 goto failed;
110 return skb;
111 }
112
75e84b7c
JH
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
7b1abbbe 137struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 138 const void *param, u8 event, u32 timeout)
75e84b7c
JH
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
7b1abbbe 148 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH
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
7b1abbbe
JH
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,
07dc93dd 192 const void *param, u32 timeout)
7b1abbbe
JH
193{
194 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH
195}
196EXPORT_SYMBOL(__hci_cmd_sync);
197
1da177e4 198/* Execute request and wait for completion. */
01178cd4 199static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH
200 void (*func)(struct hci_request *req,
201 unsigned long opt),
01178cd4 202 unsigned long opt, __u32 timeout)
1da177e4 203{
42c6b129 204 struct hci_request req;
1da177e4
LT
205 DECLARE_WAITQUEUE(wait, current);
206 int err = 0;
207
208 BT_DBG("%s start", hdev->name);
209
42c6b129
JH
210 hci_req_init(&req, hdev);
211
1da177e4
LT
212 hdev->req_status = HCI_REQ_PEND;
213
42c6b129 214 func(&req, opt);
53cce22d 215
42c6b129
JH
216 err = hci_req_run(&req, hci_req_sync_complete);
217 if (err < 0) {
53cce22d 218 hdev->req_status = 0;
920c8300
AG
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.
42c6b129 224 */
920c8300
AG
225 if (err == -ENODATA)
226 return 0;
227
228 return err;
53cce22d
JH
229 }
230
bc4445c7
AG
231 add_wait_queue(&hdev->req_wait_q, &wait);
232 set_current_state(TASK_INTERRUPTIBLE);
233
1da177e4
LT
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:
e175072f 243 err = -bt_to_errno(hdev->req_result);
1da177e4
LT
244 break;
245
246 case HCI_REQ_CANCELED:
247 err = -hdev->req_result;
248 break;
249
250 default:
251 err = -ETIMEDOUT;
252 break;
3ff50b79 253 }
1da177e4 254
a5040efa 255 hdev->req_status = hdev->req_result = 0;
1da177e4
LT
256
257 BT_DBG("%s end: err %d", hdev->name, err);
258
259 return err;
260}
261
01178cd4 262static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH
263 void (*req)(struct hci_request *req,
264 unsigned long opt),
01178cd4 265 unsigned long opt, __u32 timeout)
1da177e4
LT
266{
267 int ret;
268
7c6a329e
MH
269 if (!test_bit(HCI_UP, &hdev->flags))
270 return -ENETDOWN;
271
1da177e4
LT
272 /* Serialize all requests */
273 hci_req_lock(hdev);
01178cd4 274 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT
275 hci_req_unlock(hdev);
276
277 return ret;
278}
279
42c6b129 280static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 281{
42c6b129 282 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT
283
284 /* Reset device */
42c6b129
JH
285 set_bit(HCI_RESET, &req->hdev->flags);
286 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT
287}
288
42c6b129 289static void bredr_init(struct hci_request *req)
1da177e4 290{
42c6b129 291 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 292
1da177e4 293 /* Read Local Supported Features */
42c6b129 294 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 295
1143e5a6 296 /* Read Local Version */
42c6b129 297 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH
298
299 /* Read BD Address */
42c6b129 300 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT
301}
302
42c6b129 303static void amp_init(struct hci_request *req)
e61ef499 304{
42c6b129 305 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 306
e61ef499 307 /* Read Local Version */
42c6b129 308 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE
309
310 /* Read Local AMP Info */
42c6b129 311 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE
312
313 /* Read Data Blk size */
42c6b129 314 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
e61ef499
AE
315}
316
42c6b129 317static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 318{
42c6b129 319 struct hci_dev *hdev = req->hdev;
e61ef499
AE
320
321 BT_DBG("%s %ld", hdev->name, opt);
322
11778716
AE
323 /* Reset */
324 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 325 hci_reset_req(req, 0);
11778716 326
e61ef499
AE
327 switch (hdev->dev_type) {
328 case HCI_BREDR:
42c6b129 329 bredr_init(req);
e61ef499
AE
330 break;
331
332 case HCI_AMP:
42c6b129 333 amp_init(req);
e61ef499
AE
334 break;
335
336 default:
337 BT_ERR("Unknown device type %d", hdev->dev_type);
338 break;
339 }
e61ef499
AE
340}
341
42c6b129 342static void bredr_setup(struct hci_request *req)
2177bab5 343{
2177bab5
JH
344 __le16 param;
345 __u8 flt_type;
346
347 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 348 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH
349
350 /* Read Class of Device */
42c6b129 351 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH
352
353 /* Read Local Name */
42c6b129 354 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH
355
356 /* Read Voice Setting */
42c6b129 357 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5
JH
358
359 /* Clear Event Filters */
360 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 361 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH
362
363 /* Connection accept timeout ~20 secs */
364 param = __constant_cpu_to_le16(0x7d00);
42c6b129 365 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 366
f332ec66
JH
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 }
2177bab5
JH
372}
373
42c6b129 374static void le_setup(struct hci_request *req)
2177bab5 375{
c73eee91
JH
376 struct hci_dev *hdev = req->hdev;
377
2177bab5 378 /* Read LE Buffer Size */
42c6b129 379 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH
380
381 /* Read LE Local Supported Features */
42c6b129 382 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5
JH
383
384 /* Read LE Advertising Channel TX Power */
42c6b129 385 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH
386
387 /* Read LE White List Size */
42c6b129 388 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5
JH
389
390 /* Read LE Supported States */
42c6b129 391 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
c73eee91
JH
392
393 /* LE-only controllers have LE implicitly enabled */
394 if (!lmp_bredr_capable(hdev))
395 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH
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
42c6b129 426static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH
427{
428 u8 mode;
429
42c6b129 430 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 431
42c6b129 432 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH
433}
434
42c6b129 435static void hci_setup_event_mask(struct hci_request *req)
2177bab5 436{
42c6b129
JH
437 struct hci_dev *hdev = req->hdev;
438
2177bab5
JH
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
42c6b129 494 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH
495
496 if (lmp_le_capable(hdev)) {
497 memset(events, 0, sizeof(events));
498 events[0] = 0x1f;
42c6b129
JH
499 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
500 sizeof(events), events);
2177bab5
JH
501 }
502}
503
42c6b129 504static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 505{
42c6b129
JH
506 struct hci_dev *hdev = req->hdev;
507
2177bab5 508 if (lmp_bredr_capable(hdev))
42c6b129 509 bredr_setup(req);
2177bab5
JH
510
511 if (lmp_le_capable(hdev))
42c6b129 512 le_setup(req);
2177bab5 513
42c6b129 514 hci_setup_event_mask(req);
2177bab5
JH
515
516 if (hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 517 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH
518
519 if (lmp_ssp_capable(hdev)) {
520 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
521 u8 mode = 0x01;
42c6b129
JH
522 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
523 sizeof(mode), &mode);
2177bab5
JH
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
42c6b129 530 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH
531 }
532 }
533
534 if (lmp_inq_rssi_capable(hdev))
42c6b129 535 hci_setup_inquiry_mode(req);
2177bab5
JH
536
537 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 538 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH
539
540 if (lmp_ext_feat_capable(hdev)) {
541 struct hci_cp_read_local_ext_features cp;
542
543 cp.page = 0x01;
42c6b129
JH
544 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
545 sizeof(cp), &cp);
2177bab5
JH
546 }
547
548 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
549 u8 enable = 1;
42c6b129
JH
550 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
551 &enable);
2177bab5
JH
552 }
553}
554
42c6b129 555static void hci_setup_link_policy(struct hci_request *req)
2177bab5 556{
42c6b129 557 struct hci_dev *hdev = req->hdev;
2177bab5
JH
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);
42c6b129 571 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH
572}
573
42c6b129 574static void hci_set_le_support(struct hci_request *req)
2177bab5 575{
42c6b129 576 struct hci_dev *hdev = req->hdev;
2177bab5
JH
577 struct hci_cp_write_le_host_supported cp;
578
c73eee91
JH
579 /* LE-only devices do not support explicit enablement */
580 if (!lmp_bredr_capable(hdev))
581 return;
582
2177bab5
JH
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))
42c6b129
JH
591 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
592 &cp);
2177bab5
JH
593}
594
42c6b129 595static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 596{
42c6b129 597 struct hci_dev *hdev = req->hdev;
d2c5d77f 598 u8 p;
42c6b129 599
59f45d57
JH
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
2177bab5 610 if (hdev->commands[5] & 0x10)
42c6b129 611 hci_setup_link_policy(req);
2177bab5 612
04b4edcb 613 if (lmp_le_capable(hdev)) {
42c6b129 614 hci_set_le_support(req);
04b4edcb
JH
615 hci_update_ad(req);
616 }
d2c5d77f
JH
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 }
2177bab5
JH
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
42c6b129 650static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT
651{
652 __u8 scan = opt;
653
42c6b129 654 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT
655
656 /* Inquiry and Page scans */
42c6b129 657 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT
658}
659
42c6b129 660static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT
661{
662 __u8 auth = opt;
663
42c6b129 664 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT
665
666 /* Authentication */
42c6b129 667 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT
668}
669
42c6b129 670static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT
671{
672 __u8 encrypt = opt;
673
42c6b129 674 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 675
e4e8e37c 676 /* Encryption */
42c6b129 677 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT
678}
679
42c6b129 680static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH
681{
682 __le16 policy = cpu_to_le16(opt);
683
42c6b129 684 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH
685
686 /* Default link policy */
42c6b129 687 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH
688}
689
8e87d142 690/* Get HCI device by index.
1da177e4
LT
691 * Device is held on return. */
692struct hci_dev *hci_dev_get(int index)
693{
8035ded4 694 struct hci_dev *hdev = NULL, *d;
1da177e4
LT
695
696 BT_DBG("%d", index);
697
698 if (index < 0)
699 return NULL;
700
701 read_lock(&hci_dev_list_lock);
8035ded4 702 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT
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}
1da177e4
LT
711
712/* ---- Inquiry support ---- */
ff9ef578 713
30dc78e1
JH
714bool hci_discovery_active(struct hci_dev *hdev)
715{
716 struct discovery_state *discov = &hdev->discovery;
717
6fbe195d 718 switch (discov->state) {
343f935b 719 case DISCOVERY_FINDING:
6fbe195d 720 case DISCOVERY_RESOLVING:
30dc78e1
JH
721 return true;
722
6fbe195d
AG
723 default:
724 return false;
725 }
30dc78e1
JH
726}
727
ff9ef578
JH
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:
7b99b659
AG
737 if (hdev->discovery.state != DISCOVERY_STARTING)
738 mgmt_discovering(hdev, 0);
ff9ef578
JH
739 break;
740 case DISCOVERY_STARTING:
741 break;
343f935b 742 case DISCOVERY_FINDING:
ff9ef578
JH
743 mgmt_discovering(hdev, 1);
744 break;
30dc78e1
JH
745 case DISCOVERY_RESOLVING:
746 break;
ff9ef578
JH
747 case DISCOVERY_STOPPING:
748 break;
749 }
750
751 hdev->discovery.state = state;
752}
753
1da177e4
LT
754static void inquiry_cache_flush(struct hci_dev *hdev)
755{
30883512 756 struct discovery_state *cache = &hdev->discovery;
b57c1a56 757 struct inquiry_entry *p, *n;
1da177e4 758
561aafbc
JH
759 list_for_each_entry_safe(p, n, &cache->all, all) {
760 list_del(&p->all);
b57c1a56 761 kfree(p);
1da177e4 762 }
561aafbc
JH
763
764 INIT_LIST_HEAD(&cache->unknown);
765 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT
766}
767
a8c5fb1a
GP
768struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
769 bdaddr_t *bdaddr)
1da177e4 770{
30883512 771 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT
772 struct inquiry_entry *e;
773
6ed93dc6 774 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 775
561aafbc
JH
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,
04124681 785 bdaddr_t *bdaddr)
561aafbc 786{
30883512 787 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH
788 struct inquiry_entry *e;
789
6ed93dc6 790 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH
791
792 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 793 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH
794 return e;
795 }
796
797 return NULL;
1da177e4
LT
798}
799
30dc78e1 800struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP
801 bdaddr_t *bdaddr,
802 int state)
30dc78e1
JH
803{
804 struct discovery_state *cache = &hdev->discovery;
805 struct inquiry_entry *e;
806
6ed93dc6 807 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH
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
a3d4e20a 819void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 820 struct inquiry_entry *ie)
a3d4e20a
JH
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 &&
a8c5fb1a 830 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH
831 break;
832 pos = &p->list;
833 }
834
835 list_add(&ie->list, pos);
836}
837
3175405b 838bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 839 bool name_known, bool *ssp)
1da177e4 840{
30883512 841 struct discovery_state *cache = &hdev->discovery;
70f23020 842 struct inquiry_entry *ie;
1da177e4 843
6ed93dc6 844 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 845
2b2fec4d
SJ
846 hci_remove_remote_oob_data(hdev, &data->bdaddr);
847
388fc8fa
JH
848 if (ssp)
849 *ssp = data->ssp_mode;
850
70f23020 851 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 852 if (ie) {
388fc8fa
JH
853 if (ie->data.ssp_mode && ssp)
854 *ssp = true;
855
a3d4e20a 856 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 857 data->rssi != ie->data.rssi) {
a3d4e20a
JH
858 ie->data.rssi = data->rssi;
859 hci_inquiry_cache_update_resolve(hdev, ie);
860 }
861
561aafbc 862 goto update;
a3d4e20a 863 }
561aafbc
JH
864
865 /* Entry not in the cache. Add new one. */
866 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
867 if (!ie)
3175405b 868 return false;
561aafbc
JH
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 }
70f23020 878
561aafbc
JH
879update:
880 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 881 ie->name_state != NAME_PENDING) {
561aafbc
JH
882 ie->name_state = NAME_KNOWN;
883 list_del(&ie->list);
1da177e4
LT
884 }
885
70f23020
AE
886 memcpy(&ie->data, data, sizeof(*data));
887 ie->timestamp = jiffies;
1da177e4 888 cache->timestamp = jiffies;
3175405b
JH
889
890 if (ie->name_state == NAME_NOT_KNOWN)
891 return false;
892
893 return true;
1da177e4
LT
894}
895
896static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
897{
30883512 898 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT
899 struct inquiry_info *info = (struct inquiry_info *) buf;
900 struct inquiry_entry *e;
901 int copied = 0;
902
561aafbc 903 list_for_each_entry(e, &cache->all, all) {
1da177e4 904 struct inquiry_data *data = &e->data;
b57c1a56
JH
905
906 if (copied >= num)
907 break;
908
1da177e4
LT
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;
b57c1a56 915
1da177e4 916 info++;
b57c1a56 917 copied++;
1da177e4
LT
918 }
919
920 BT_DBG("cache %p, copied %d", cache, copied);
921 return copied;
922}
923
42c6b129 924static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT
925{
926 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 927 struct hci_dev *hdev = req->hdev;
1da177e4
LT
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;
42c6b129 939 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT
940}
941
3e13fa1e
AG
942static int wait_inquiry(void *word)
943{
944 schedule();
945 return signal_pending(current);
946}
947
1da177e4
LT
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
5a08ecce
AE
960 hdev = hci_dev_get(ir.dev_id);
961 if (!hdev)
1da177e4
LT
962 return -ENODEV;
963
09fd0de5 964 hci_dev_lock(hdev);
8e87d142 965 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 966 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT
967 inquiry_cache_flush(hdev);
968 do_inquiry = 1;
969 }
09fd0de5 970 hci_dev_unlock(hdev);
1da177e4 971
04837f64 972 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE
973
974 if (do_inquiry) {
01178cd4
JH
975 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
976 timeo);
70f23020
AE
977 if (err < 0)
978 goto done;
3e13fa1e
AG
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;
70f23020 986 }
1da177e4 987
8fc9ced3
GP
988 /* for unlimited number of responses we will use buffer with
989 * 255 entries
990 */
1da177e4
LT
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 */
01df8c31 996 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 997 if (!buf) {
1da177e4
LT
998 err = -ENOMEM;
999 goto done;
1000 }
1001
09fd0de5 1002 hci_dev_lock(hdev);
1da177e4 1003 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1004 hci_dev_unlock(hdev);
1da177e4
LT
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) *
a8c5fb1a 1011 ir.num_rsp))
1da177e4 1012 err = -EFAULT;
8e87d142 1013 } else
1da177e4
LT
1014 err = -EFAULT;
1015
1016 kfree(buf);
1017
1018done:
1019 hci_dev_put(hdev);
1020 return err;
1021}
1022
3f0f524b
JH
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
04b4edcb 1081void hci_update_ad(struct hci_request *req)
3f0f524b 1082{
04b4edcb 1083 struct hci_dev *hdev = req->hdev;
3f0f524b
JH
1084 struct hci_cp_le_set_adv_data cp;
1085 u8 len;
3f0f524b 1086
04b4edcb
JH
1087 if (!lmp_le_capable(hdev))
1088 return;
3f0f524b
JH
1089
1090 memset(&cp, 0, sizeof(cp));
1091
1092 len = create_ad(hdev, cp.data);
1093
1094 if (hdev->adv_data_len == len &&
04b4edcb
JH
1095 memcmp(cp.data, hdev->adv_data, len) == 0)
1096 return;
3f0f524b
JH
1097
1098 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1099 hdev->adv_data_len = len;
1100
1101 cp.length = len;
3f0f524b 1102
04b4edcb 1103 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH
1104}
1105
1da177e4
LT
1106/* ---- HCI ioctl helpers ---- */
1107
1108int hci_dev_open(__u16 dev)
1109{
1110 struct hci_dev *hdev;
1111 int ret = 0;
1112
5a08ecce
AE
1113 hdev = hci_dev_get(dev);
1114 if (!hdev)
1da177e4
LT
1115 return -ENODEV;
1116
1117 BT_DBG("%s %p", hdev->name, hdev);
1118
1119 hci_req_lock(hdev);
1120
94324962
JH
1121 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1122 ret = -ENODEV;
1123 goto done;
1124 }
1125
23035271
JH
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)) {
611b30f7
MH
1131 ret = -ERFKILL;
1132 goto done;
1133 }
1134
1da177e4
LT
1135 if (test_bit(HCI_UP, &hdev->flags)) {
1136 ret = -EALREADY;
1137 goto done;
1138 }
1139
1da177e4
LT
1140 if (hdev->open(hdev)) {
1141 ret = -EIO;
1142 goto done;
1143 }
1144
f41c70c4
MH
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);
1da177e4
LT
1163 }
1164
f41c70c4
MH
1165 clear_bit(HCI_INIT, &hdev->flags);
1166
1da177e4
LT
1167 if (!ret) {
1168 hci_dev_hold(hdev);
1169 set_bit(HCI_UP, &hdev->flags);
1170 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a
AE
1171 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1172 mgmt_valid_hdev(hdev)) {
09fd0de5 1173 hci_dev_lock(hdev);
744cf19e 1174 mgmt_powered(hdev, 1);
09fd0de5 1175 hci_dev_unlock(hdev);
56e5cb86 1176 }
8e87d142 1177 } else {
1da177e4 1178 /* Init failed, cleanup */
3eff45ea 1179 flush_work(&hdev->tx_work);
c347b765 1180 flush_work(&hdev->cmd_work);
b78752cc 1181 flush_work(&hdev->rx_work);
1da177e4
LT
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
28b75a89
AG
1208 cancel_work_sync(&hdev->le_scan);
1209
78c04c0b
VCG
1210 cancel_delayed_work(&hdev->power_off);
1211
1da177e4
LT
1212 hci_req_cancel(hdev, ENODEV);
1213 hci_req_lock(hdev);
1214
1215 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1216 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT
1217 hci_req_unlock(hdev);
1218 return 0;
1219 }
1220
3eff45ea
GP
1221 /* Flush RX and TX works */
1222 flush_work(&hdev->tx_work);
b78752cc 1223 flush_work(&hdev->rx_work);
1da177e4 1224
16ab91ab 1225 if (hdev->discov_timeout > 0) {
e0f9309f 1226 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1227 hdev->discov_timeout = 0;
5e5282bb 1228 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH
1229 }
1230
a8b2d5c2 1231 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH
1232 cancel_delayed_work(&hdev->service_cache);
1233
7ba8b4be
AG
1234 cancel_delayed_work_sync(&hdev->le_scan_disable);
1235
09fd0de5 1236 hci_dev_lock(hdev);
1da177e4
LT
1237 inquiry_cache_flush(hdev);
1238 hci_conn_hash_flush(hdev);
09fd0de5 1239 hci_dev_unlock(hdev);
1da177e4
LT
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);
8af59467 1249 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1250 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1251 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1252 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT
1253 clear_bit(HCI_INIT, &hdev->flags);
1254 }
1255
c347b765
GP
1256 /* flush cmd work */
1257 flush_work(&hdev->cmd_work);
1da177e4
LT
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) {
b79f44c1 1266 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT
1267 kfree_skb(hdev->sent_cmd);
1268 hdev->sent_cmd = NULL;
1269 }
1270
b6ddb638
JH
1271 kfree_skb(hdev->recv_evt);
1272 hdev->recv_evt = NULL;
1273
1da177e4
LT
1274 /* After this point our queues are empty
1275 * and no tasks are scheduled. */
1276 hdev->close(hdev);
1277
35b973c9
JH
1278 /* Clear flags */
1279 hdev->flags = 0;
1280 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1281
bb4b2a9a
AE
1282 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1283 mgmt_valid_hdev(hdev)) {
8ee56540
MH
1284 hci_dev_lock(hdev);
1285 mgmt_powered(hdev, 0);
1286 hci_dev_unlock(hdev);
1287 }
5add6af8 1288
ced5c338
AE
1289 /* Controller radio is available but is currently powered down */
1290 hdev->amp_status = 0;
1291
e59fda8d 1292 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1293 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1294
1da177e4
LT
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
70f23020
AE
1306 hdev = hci_dev_get(dev);
1307 if (!hdev)
1da177e4 1308 return -ENODEV;
8ee56540
MH
1309
1310 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1311 cancel_delayed_work(&hdev->power_off);
1312
1da177e4 1313 err = hci_dev_do_close(hdev);
8ee56540 1314
1da177e4
LT
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
70f23020
AE
1324 hdev = hci_dev_get(dev);
1325 if (!hdev)
1da177e4
LT
1326 return -ENODEV;
1327
1328 hci_req_lock(hdev);
1da177e4
LT
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
09fd0de5 1337 hci_dev_lock(hdev);
1da177e4
LT
1338 inquiry_cache_flush(hdev);
1339 hci_conn_hash_flush(hdev);
09fd0de5 1340 hci_dev_unlock(hdev);
1da177e4
LT
1341
1342 if (hdev->flush)
1343 hdev->flush(hdev);
1344
8e87d142 1345 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1346 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT
1347
1348 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1349 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT
1350
1351done:
1da177e4
LT
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
70f23020
AE
1362 hdev = hci_dev_get(dev);
1363 if (!hdev)
1da177e4
LT
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
70f23020
AE
1382 hdev = hci_dev_get(dr.dev_id);
1383 if (!hdev)
1da177e4
LT
1384 return -ENODEV;
1385
1386 switch (cmd) {
1387 case HCISETAUTH:
01178cd4
JH
1388 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1389 HCI_INIT_TIMEOUT);
1da177e4
LT
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 */
01178cd4
JH
1400 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1401 HCI_INIT_TIMEOUT);
1da177e4
LT
1402 if (err)
1403 break;
1404 }
1405
01178cd4
JH
1406 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1407 HCI_INIT_TIMEOUT);
1da177e4
LT
1408 break;
1409
1410 case HCISETSCAN:
01178cd4
JH
1411 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1412 HCI_INIT_TIMEOUT);
1da177e4
LT
1413 break;
1414
1da177e4 1415 case HCISETLINKPOL:
01178cd4
JH
1416 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1417 HCI_INIT_TIMEOUT);
1da177e4
LT
1418 break;
1419
1420 case HCISETLINKMODE:
e4e8e37c
MH
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;
1da177e4
LT
1427 break;
1428
1429 case HCISETACLMTU:
e4e8e37c
MH
1430 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1431 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT
1432 break;
1433
1434 case HCISETSCOMTU:
e4e8e37c
MH
1435 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1436 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT
1437 break;
1438
1439 default:
1440 err = -EINVAL;
1441 break;
1442 }
e4e8e37c 1443
1da177e4
LT
1444 hci_dev_put(hdev);
1445 return err;
1446}
1447
1448int hci_get_dev_list(void __user *arg)
1449{
8035ded4 1450 struct hci_dev *hdev;
1da177e4
LT
1451 struct hci_dev_list_req *dl;
1452 struct hci_dev_req *dr;
1da177e4
LT
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
70f23020
AE
1464 dl = kzalloc(size, GFP_KERNEL);
1465 if (!dl)
1da177e4
LT
1466 return -ENOMEM;
1467
1468 dr = dl->dev_req;
1469
f20d09d5 1470 read_lock(&hci_dev_list_lock);
8035ded4 1471 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1472 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1473 cancel_delayed_work(&hdev->power_off);
c542a06c 1474
a8b2d5c2
JH
1475 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1476 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1477
1da177e4
LT
1478 (dr + n)->dev_id = hdev->id;
1479 (dr + n)->dev_opt = hdev->flags;
c542a06c 1480
1da177e4
LT
1481 if (++n >= dev_num)
1482 break;
1483 }
f20d09d5 1484 read_unlock(&hci_dev_list_lock);
1da177e4
LT
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
70f23020
AE
1504 hdev = hci_dev_get(di.dev_id);
1505 if (!hdev)
1da177e4
LT
1506 return -ENODEV;
1507
a8b2d5c2 1508 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1509 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1510
a8b2d5c2
JH
1511 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1512 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1513
1da177e4
LT
1514 strcpy(di.name, hdev->name);
1515 di.bdaddr = hdev->bdaddr;
943da25d 1516 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT
1517 di.flags = hdev->flags;
1518 di.pkt_type = hdev->pkt_type;
572c7f84
JH
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 }
1da177e4
LT
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
611b30f7
MH
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
ddc650c1
JH
1552 if (blocked) {
1553 set_bit(HCI_RFKILLED, &hdev->dev_flags);
23035271
JH
1554 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1555 hci_dev_do_close(hdev);
ddc650c1
JH
1556 } else {
1557 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1558}
611b30f7
MH
1559
1560 return 0;
1561}
1562
1563static const struct rfkill_ops hci_rfkill_ops = {
1564 .set_block = hci_rfkill_set_block,
1565};
1566
ab81cbf9
JH
1567static void hci_power_on(struct work_struct *work)
1568{
1569 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1570 int err;
ab81cbf9
JH
1571
1572 BT_DBG("%s", hdev->name);
1573
96570ffc
JH
1574 err = hci_dev_open(hdev->id);
1575 if (err < 0) {
1576 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1577 return;
96570ffc 1578 }
ab81cbf9 1579
23035271
JH
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)) {
19202573
JH
1584 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1585 HCI_AUTO_OFF_TIMEOUT);
23035271 1586 }
ab81cbf9 1587
a8b2d5c2 1588 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1589 mgmt_index_added(hdev);
ab81cbf9
JH
1590}
1591
1592static void hci_power_off(struct work_struct *work)
1593{
3243553f 1594 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1595 power_off.work);
ab81cbf9
JH
1596
1597 BT_DBG("%s", hdev->name);
1598
8ee56540 1599 hci_dev_do_close(hdev);
ab81cbf9
JH
1600}
1601
16ab91ab
JH
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
09fd0de5 1611 hci_dev_lock(hdev);
16ab91ab
JH
1612
1613 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1614
1615 hdev->discov_timeout = 0;
1616
09fd0de5 1617 hci_dev_unlock(hdev);
16ab91ab
JH
1618}
1619
2aeb9a1a
JH
1620int hci_uuids_clear(struct hci_dev *hdev)
1621{
4821002c 1622 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1623
4821002c
JH
1624 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1625 list_del(&uuid->list);
2aeb9a1a
JH
1626 kfree(uuid);
1627 }
1628
1629 return 0;
1630}
1631
55ed8ca1
JH
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
b899efaf
VCG
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
55ed8ca1
JH
1660struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1661{
8035ded4 1662 struct link_key *k;
55ed8ca1 1663
8035ded4 1664 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH
1665 if (bacmp(bdaddr, &k->bdaddr) == 0)
1666 return k;
55ed8ca1
JH
1667
1668 return NULL;
1669}
1670
745c0ce3 1671static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1672 u8 key_type, u8 old_key_type)
d25e28ab
JH
1673{
1674 /* Legacy key */
1675 if (key_type < 0x03)
745c0ce3 1676 return true;
d25e28ab
JH
1677
1678 /* Debug keys are insecure so don't store them persistently */
1679 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1680 return false;
d25e28ab
JH
1681
1682 /* Changed combination key and there's no previous one */
1683 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1684 return false;
d25e28ab
JH
1685
1686 /* Security mode 3 case */
1687 if (!conn)
745c0ce3 1688 return true;
d25e28ab
JH
1689
1690 /* Neither local nor remote side had no-bonding as requirement */
1691 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1692 return true;
d25e28ab
JH
1693
1694 /* Local side had dedicated bonding as requirement */
1695 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1696 return true;
d25e28ab
JH
1697
1698 /* Remote side had dedicated bonding as requirement */
1699 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1700 return true;
d25e28ab
JH
1701
1702 /* If none of the above criteria match, then don't store the key
1703 * persistently */
745c0ce3 1704 return false;
d25e28ab
JH
1705}
1706
c9839a11 1707struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1708{
c9839a11 1709 struct smp_ltk *k;
75d262c2 1710
c9839a11
VCG
1711 list_for_each_entry(k, &hdev->long_term_keys, list) {
1712 if (k->ediv != ediv ||
a8c5fb1a 1713 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG
1714 continue;
1715
c9839a11 1716 return k;
75d262c2
VCG
1717 }
1718
1719 return NULL;
1720}
75d262c2 1721
c9839a11 1722struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1723 u8 addr_type)
75d262c2 1724{
c9839a11 1725 struct smp_ltk *k;
75d262c2 1726
c9839a11
VCG
1727 list_for_each_entry(k, &hdev->long_term_keys, list)
1728 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1729 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG
1730 return k;
1731
1732 return NULL;
1733}
75d262c2 1734
d25e28ab 1735int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1736 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH
1737{
1738 struct link_key *key, *old_key;
745c0ce3
VA
1739 u8 old_key_type;
1740 bool persistent;
55ed8ca1
JH
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 {
12adcf3a 1747 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH
1748 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1749 if (!key)
1750 return -ENOMEM;
1751 list_add(&key->list, &hdev->link_keys);
1752 }
1753
6ed93dc6 1754 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1755
d25e28ab
JH
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 &&
a8c5fb1a 1760 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1761 type = HCI_LK_COMBINATION;
655fe6ec
JH
1762 if (conn)
1763 conn->key_type = type;
1764 }
d25e28ab 1765
55ed8ca1 1766 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1767 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH
1768 key->pin_len = pin_len;
1769
b6020ba0 1770 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1771 key->type = old_key_type;
4748fed2
JH
1772 else
1773 key->type = type;
1774
4df378a1
JH
1775 if (!new_key)
1776 return 0;
1777
1778 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1779
744cf19e 1780 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1781
6ec5bcad
VA
1782 if (conn)
1783 conn->flush_key = !persistent;
55ed8ca1
JH
1784
1785 return 0;
1786}
1787
c9839a11 1788int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1789 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1790 ediv, u8 rand[8])
75d262c2 1791{
c9839a11 1792 struct smp_ltk *key, *old_key;
75d262c2 1793
c9839a11
VCG
1794 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1795 return 0;
75d262c2 1796
c9839a11
VCG
1797 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1798 if (old_key)
75d262c2 1799 key = old_key;
c9839a11
VCG
1800 else {
1801 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG
1802 if (!key)
1803 return -ENOMEM;
c9839a11 1804 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG
1805 }
1806
75d262c2 1807 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG
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));
75d262c2 1815
c9839a11
VCG
1816 if (!new_key)
1817 return 0;
75d262c2 1818
261cc5aa
VCG
1819 if (type & HCI_SMP_LTK)
1820 mgmt_new_ltk(hdev, key, 1);
1821
75d262c2
VCG
1822 return 0;
1823}
1824
55ed8ca1
JH
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
6ed93dc6 1833 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH
1834
1835 list_del(&key->list);
1836 kfree(key);
1837
1838 return 0;
1839}
1840
b899efaf
VCG
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
6ed93dc6 1849 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG
1850
1851 list_del(&k->list);
1852 kfree(k);
1853 }
1854
1855 return 0;
1856}
1857
6bd32326 1858/* HCI command timer function */
bda4f23a 1859static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT
1860{
1861 struct hci_dev *hdev = (void *) arg;
1862
bda4f23a
AE
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
6bd32326 1872 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1873 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT
1874}
1875
2763eda6 1876struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1877 bdaddr_t *bdaddr)
2763eda6
SJ
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
6ed93dc6 1896 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ
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,
04124681 1917 u8 *randomizer)
2763eda6
SJ
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
6ed93dc6 1935 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ
1936
1937 return 0;
1938}
1939
04124681 1940struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1941{
8035ded4 1942 struct bdaddr_list *b;
b2a66aad 1943
8035ded4 1944 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ
1945 if (bacmp(bdaddr, &b->bdaddr) == 0)
1946 return b;
b2a66aad
AJ
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
88c1fe4b 1967int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ
1968{
1969 struct bdaddr_list *entry;
b2a66aad
AJ
1970
1971 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1972 return -EBADF;
1973
5e762444
AJ
1974 if (hci_blacklist_lookup(hdev, bdaddr))
1975 return -EEXIST;
b2a66aad
AJ
1976
1977 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ
1978 if (!entry)
1979 return -ENOMEM;
b2a66aad
AJ
1980
1981 bacpy(&entry->bdaddr, bdaddr);
1982
1983 list_add(&entry->list, &hdev->blacklist);
1984
88c1fe4b 1985 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ
1986}
1987
88c1fe4b 1988int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ
1989{
1990 struct bdaddr_list *entry;
b2a66aad 1991
1ec918ce 1992 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1993 return hci_blacklist_clear(hdev);
b2a66aad
AJ
1994
1995 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1996 if (!entry)
5e762444 1997 return -ENOENT;
b2a66aad
AJ
1998
1999 list_del(&entry->list);
2000 kfree(entry);
2001
88c1fe4b 2002 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ
2003}
2004
42c6b129 2005static void le_scan_param_req(struct hci_request *req, unsigned long opt)
7ba8b4be
AG
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
42c6b129 2015 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
7ba8b4be
AG
2016}
2017
42c6b129 2018static void le_scan_enable_req(struct hci_request *req, unsigned long opt)
7ba8b4be
AG
2019{
2020 struct hci_cp_le_set_scan_enable cp;
2021
2022 memset(&cp, 0, sizeof(cp));
76a388be 2023 cp.enable = LE_SCAN_ENABLE;
525e296a 2024 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
7ba8b4be 2025
42c6b129 2026 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
7ba8b4be
AG
2027}
2028
2029static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 2030 u16 window, int timeout)
7ba8b4be
AG
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
01178cd4
JH
2047 err = __hci_req_sync(hdev, le_scan_param_req, (unsigned long) &param,
2048 timeo);
7ba8b4be 2049 if (!err)
01178cd4 2050 err = __hci_req_sync(hdev, le_scan_enable_req, 0, timeo);
7ba8b4be
AG
2051
2052 hci_req_unlock(hdev);
2053
2054 if (err < 0)
2055 return err;
2056
46818ed5 2057 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
b6c7515a 2058 timeout);
7ba8b4be
AG
2059
2060 return 0;
2061}
2062
7dbfac1d
AG
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
7ba8b4be
AG
2081static void le_scan_disable_work(struct work_struct *work)
2082{
2083 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2084 le_scan_disable.work);
7ba8b4be
AG
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
28b75a89
AG
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
04124681
GP
2101 hci_do_le_scan(hdev, param->type, param->interval, param->window,
2102 param->timeout);
28b75a89
AG
2103}
2104
2105int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 2106 int timeout)
28b75a89
AG
2107{
2108 struct le_scan_params *param = &hdev->le_scan_params;
2109
2110 BT_DBG("%s", hdev->name);
2111
f1550478
JH
2112 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
2113 return -ENOTSUPP;
2114
28b75a89
AG
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
9be0dab7
DH
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
b1b813d4
DH
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 */
bbaf444a
JH
2141 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2142 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2143
b1b813d4
DH
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);
6b536b5e 2156 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH
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
b1b813d4
DH
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
b1b813d4
DH
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
bda4f23a 2174 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2175
b1b813d4
DH
2176 hci_init_sysfs(hdev);
2177 discovery_init(hdev);
9be0dab7
DH
2178
2179 return hdev;
2180}
2181EXPORT_SYMBOL(hci_alloc_dev);
2182
2183/* Free HCI device */
2184void hci_free_dev(struct hci_dev *hdev)
2185{
9be0dab7
DH
2186 /* will free via device release */
2187 put_device(&hdev->dev);
2188}
2189EXPORT_SYMBOL(hci_free_dev);
2190
1da177e4
LT
2191/* Register HCI device */
2192int hci_register_dev(struct hci_dev *hdev)
2193{
b1b813d4 2194 int id, error;
1da177e4 2195
010666a1 2196 if (!hdev->open || !hdev->close)
1da177e4
LT
2197 return -EINVAL;
2198
08add513
MM
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 */
3df92b31
SL
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;
1da177e4 2211 }
8e87d142 2212
3df92b31
SL
2213 if (id < 0)
2214 return id;
2215
1da177e4
LT
2216 sprintf(hdev->name, "hci%d", id);
2217 hdev->id = id;
2d8b3a11
AE
2218
2219 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2220
3df92b31
SL
2221 write_lock(&hci_dev_list_lock);
2222 list_add(&hdev->list, &hci_dev_list);
f20d09d5 2223 write_unlock(&hci_dev_list_lock);
1da177e4 2224
32845eb1 2225 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 2226 WQ_MEM_RECLAIM, 1);
33ca954d
DH
2227 if (!hdev->workqueue) {
2228 error = -ENOMEM;
2229 goto err;
2230 }
f48fd9c8 2231
6ead1bbc
JH
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
33ca954d
DH
2241 error = hci_add_sysfs(hdev);
2242 if (error < 0)
2243 goto err_wqueue;
1da177e4 2244
611b30f7 2245 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP
2246 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2247 hdev);
611b30f7
MH
2248 if (hdev->rfkill) {
2249 if (rfkill_register(hdev->rfkill) < 0) {
2250 rfkill_destroy(hdev->rfkill);
2251 hdev->rfkill = NULL;
2252 }
2253 }
2254
ddc650c1
JH
2255 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2256 set_bit(HCI_RFKILLED, &hdev->dev_flags);
2257
a8b2d5c2 2258 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE
2259
2260 if (hdev->dev_type != HCI_AMP)
2261 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2262
1da177e4 2263 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2264 hci_dev_hold(hdev);
1da177e4 2265
19202573 2266 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2267
1da177e4 2268 return id;
f48fd9c8 2269
33ca954d
DH
2270err_wqueue:
2271 destroy_workqueue(hdev->workqueue);
6ead1bbc 2272 destroy_workqueue(hdev->req_workqueue);
33ca954d 2273err:
3df92b31 2274 ida_simple_remove(&hci_index_ida, hdev->id);
f20d09d5 2275 write_lock(&hci_dev_list_lock);
f48fd9c8 2276 list_del(&hdev->list);
f20d09d5 2277 write_unlock(&hci_dev_list_lock);
f48fd9c8 2278
33ca954d 2279 return error;
1da177e4
LT
2280}
2281EXPORT_SYMBOL(hci_register_dev);
2282
2283/* Unregister HCI device */
59735631 2284void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2285{
3df92b31 2286 int i, id;
ef222013 2287
c13854ce 2288 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2289
94324962
JH
2290 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2291
3df92b31
SL
2292 id = hdev->id;
2293
f20d09d5 2294 write_lock(&hci_dev_list_lock);
1da177e4 2295 list_del(&hdev->list);
f20d09d5 2296 write_unlock(&hci_dev_list_lock);
1da177e4
LT
2297
2298 hci_dev_do_close(hdev);
2299
cd4c5391 2300 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH
2301 kfree_skb(hdev->reassembly[i]);
2302
b9b5ef18
GP
2303 cancel_work_sync(&hdev->power_on);
2304
ab81cbf9 2305 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2306 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2307 hci_dev_lock(hdev);
744cf19e 2308 mgmt_index_removed(hdev);
09fd0de5 2309 hci_dev_unlock(hdev);
56e5cb86 2310 }
ab81cbf9 2311
2e58ef3e
JH
2312 /* mgmt_index_removed should take care of emptying the
2313 * pending list */
2314 BUG_ON(!list_empty(&hdev->mgmt_pending));
2315
1da177e4
LT
2316 hci_notify(hdev, HCI_DEV_UNREG);
2317
611b30f7
MH
2318 if (hdev->rfkill) {
2319 rfkill_unregister(hdev->rfkill);
2320 rfkill_destroy(hdev->rfkill);
2321 }
2322
ce242970 2323 hci_del_sysfs(hdev);
147e2d59 2324
f48fd9c8 2325 destroy_workqueue(hdev->workqueue);
6ead1bbc 2326 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2327
09fd0de5 2328 hci_dev_lock(hdev);
e2e0cacb 2329 hci_blacklist_clear(hdev);
2aeb9a1a 2330 hci_uuids_clear(hdev);
55ed8ca1 2331 hci_link_keys_clear(hdev);
b899efaf 2332 hci_smp_ltks_clear(hdev);
2763eda6 2333 hci_remote_oob_data_clear(hdev);
09fd0de5 2334 hci_dev_unlock(hdev);
e2e0cacb 2335
dc946bd8 2336 hci_dev_put(hdev);
3df92b31
SL
2337
2338 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT
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
76bca880
MH
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)
a8c5fb1a 2363 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH
2364 kfree_skb(skb);
2365 return -ENXIO;
2366 }
2367
d82603c6 2368 /* Incoming skb */
76bca880
MH
2369 bt_cb(skb)->incoming = 1;
2370
2371 /* Time stamp */
2372 __net_timestamp(skb);
2373
76bca880 2374 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2375 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2376
76bca880
MH
2377 return 0;
2378}
2379EXPORT_SYMBOL(hci_recv_frame);
2380
33e882a5 2381static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2382 int count, __u8 index)
33e882a5
SS
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) ||
a8c5fb1a 2391 index >= NUM_REASSEMBLY)
33e882a5
SS
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
1e429f38 2412 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS
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;
89bb46d0 2426 len = min_t(uint, scb->expect, count);
33e882a5
SS
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
ef222013
MH
2490int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2491{
f39a3c06
SS
2492 int rem = 0;
2493
ef222013
MH
2494 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2495 return -EILSEQ;
2496
da5f6c37 2497 while (count) {
1e429f38 2498 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS
2499 if (rem < 0)
2500 return rem;
ef222013 2501
f39a3c06
SS
2502 data += (count - rem);
2503 count = rem;
f81c6224 2504 }
ef222013 2505
f39a3c06 2506 return rem;
ef222013
MH
2507}
2508EXPORT_SYMBOL(hci_recv_fragment);
2509
99811510
SS
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
da5f6c37 2517 while (count) {
99811510
SS
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
1e429f38 2532 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2533 STREAM_REASSEMBLY);
99811510
SS
2534 if (rem < 0)
2535 return rem;
2536
2537 data += (count - rem);
2538 count = rem;
f81c6224 2539 }
99811510
SS
2540
2541 return rem;
2542}
2543EXPORT_SYMBOL(hci_recv_stream_fragment);
2544
1da177e4
LT
2545/* ---- Interface to upper protocols ---- */
2546
1da177e4
LT
2547int hci_register_cb(struct hci_cb *cb)
2548{
2549 BT_DBG("%p name %s", cb, cb->name);
2550
f20d09d5 2551 write_lock(&hci_cb_list_lock);
1da177e4 2552 list_add(&cb->list, &hci_cb_list);
f20d09d5 2553 write_unlock(&hci_cb_list_lock);
1da177e4
LT
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
f20d09d5 2563 write_lock(&hci_cb_list_lock);
1da177e4 2564 list_del(&cb->list);
f20d09d5 2565 write_unlock(&hci_cb_list_lock);
1da177e4
LT
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
0d48d939 2580 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2581
cd82e61c
MH
2582 /* Time stamp */
2583 __net_timestamp(skb);
1da177e4 2584
cd82e61c
MH
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 */
470fe1b5 2590 hci_send_to_sock(hdev, skb);
1da177e4
LT
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
3119ae95
JH
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;
5d73e034 2603 req->err = 0;
3119ae95
JH
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
5d73e034
AG
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
3119ae95
JH
2622 /* Do not allow empty requests */
2623 if (skb_queue_empty(&req->cmd_q))
382b0c39 2624 return -ENODATA;
3119ae95
JH
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
1ca3a9d0 2638static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2639 u32 plen, const void *param)
1da177e4
LT
2640{
2641 int len = HCI_COMMAND_HDR_SIZE + plen;
2642 struct hci_command_hdr *hdr;
2643 struct sk_buff *skb;
2644
1da177e4 2645 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH
2646 if (!skb)
2647 return NULL;
1da177e4
LT
2648
2649 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2650 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT
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
0d48d939 2658 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2659 skb->dev = (void *) hdev;
c78ae283 2660
1ca3a9d0
JH
2661 return skb;
2662}
2663
2664/* Send HCI command */
07dc93dd
JH
2665int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2666 const void *param)
1ca3a9d0
JH
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
11714b3d
JH
2678 /* Stand-alone HCI commands must be flaged as
2679 * single-command requests.
2680 */
2681 bt_cb(skb)->req.start = true;
2682
1da177e4 2683 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2684 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT
2685
2686 return 0;
2687}
1da177e4 2688
71c76a17 2689/* Queue a command to an asynchronous HCI request */
07dc93dd
JH
2690void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2691 const void *param, u8 event)
71c76a17
JH
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
34739c1e
AG
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
71c76a17
JH
2704 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2705 if (!skb) {
5d73e034
AG
2706 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2707 hdev->name, opcode);
2708 req->err = -ENOMEM;
e348fe6b 2709 return;
71c76a17
JH
2710 }
2711
2712 if (skb_queue_empty(&req->cmd_q))
2713 bt_cb(skb)->req.start = true;
2714
02350a72
JH
2715 bt_cb(skb)->req.event = event;
2716
71c76a17 2717 skb_queue_tail(&req->cmd_q, skb);