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Bluetooth: Add synchronization train parameters reading support
[mirror_ubuntu-artful-kernel.git] / net / bluetooth / hci_core.c
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8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
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 */
c7882cbd
MH		 457 } else {
458 /* Use a different default for LE-only devices */
459 memset(events, 0, sizeof(events));
460 events[0] |= 0x10; /* Disconnection Complete */
461 events[0] |= 0x80; /* Encryption Change */
462 events[1] |= 0x08; /* Read Remote Version Information Complete */
463 events[1] |= 0x20; /* Command Complete */
464 events[1] |= 0x40; /* Command Status */
465 events[1] |= 0x80; /* Hardware Error */
466 events[2] |= 0x04; /* Number of Completed Packets */
467 events[3] |= 0x02; /* Data Buffer Overflow */
468 events[5] |= 0x80; /* Encryption Key Refresh Complete */
2177bab5
JH		 469 }
470
471 if (lmp_inq_rssi_capable(hdev))
472 events[4] |= 0x02; /* Inquiry Result with RSSI */
473
474 if (lmp_sniffsubr_capable(hdev))
475 events[5] |= 0x20; /* Sniff Subrating */
476
477 if (lmp_pause_enc_capable(hdev))
478 events[5] |= 0x80; /* Encryption Key Refresh Complete */
479
480 if (lmp_ext_inq_capable(hdev))
481 events[5] |= 0x40; /* Extended Inquiry Result */
482
483 if (lmp_no_flush_capable(hdev))
484 events[7] |= 0x01; /* Enhanced Flush Complete */
485
486 if (lmp_lsto_capable(hdev))
487 events[6] |= 0x80; /* Link Supervision Timeout Changed */
488
489 if (lmp_ssp_capable(hdev)) {
490 events[6] |= 0x01; /* IO Capability Request */
491 events[6] |= 0x02; /* IO Capability Response */
492 events[6] |= 0x04; /* User Confirmation Request */
493 events[6] |= 0x08; /* User Passkey Request */
494 events[6] |= 0x10; /* Remote OOB Data Request */
495 events[6] |= 0x20; /* Simple Pairing Complete */
496 events[7] |= 0x04; /* User Passkey Notification */
497 events[7] |= 0x08; /* Keypress Notification */
498 events[7] |= 0x10; /* Remote Host Supported
499 * Features Notification
500 */
501 }
502
503 if (lmp_le_capable(hdev))
504 events[7] |= 0x20; /* LE Meta-Event */
505
42c6b129 506 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 507
508 if (lmp_le_capable(hdev)) {
509 memset(events, 0, sizeof(events));
510 events[0] = 0x1f;
42c6b129
JH		 511 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
512 sizeof(events), events);
2177bab5
JH		 513 }
514}
515
42c6b129 516static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 517{
42c6b129
JH		 518 struct hci_dev *hdev = req->hdev;
519
2177bab5 520 if (lmp_bredr_capable(hdev))
42c6b129 521 bredr_setup(req);
2177bab5
JH		 522
523 if (lmp_le_capable(hdev))
42c6b129 524 le_setup(req);
2177bab5 525
42c6b129 526 hci_setup_event_mask(req);
2177bab5 527
3f8e2d75
JH		 528 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
529 * local supported commands HCI command.
530 */
531 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 532 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 533
534 if (lmp_ssp_capable(hdev)) {
535 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
536 u8 mode = 0x01;
42c6b129
JH		 537 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
538 sizeof(mode), &mode);
2177bab5
JH		 539 } else {
540 struct hci_cp_write_eir cp;
541
542 memset(hdev->eir, 0, sizeof(hdev->eir));
543 memset(&cp, 0, sizeof(cp));
544
42c6b129 545 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 546 }
547 }
548
549 if (lmp_inq_rssi_capable(hdev))
42c6b129 550 hci_setup_inquiry_mode(req);
2177bab5
JH		 551
552 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 553 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 554
555 if (lmp_ext_feat_capable(hdev)) {
556 struct hci_cp_read_local_ext_features cp;
557
558 cp.page = 0x01;
42c6b129
JH		 559 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
560 sizeof(cp), &cp);
2177bab5
JH		 561 }
562
563 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
564 u8 enable = 1;
42c6b129
JH		 565 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
566 &enable);
2177bab5
JH		 567 }
568}
569
42c6b129 570static void hci_setup_link_policy(struct hci_request *req)
2177bab5 571{
42c6b129 572 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 573 struct hci_cp_write_def_link_policy cp;
574 u16 link_policy = 0;
575
576 if (lmp_rswitch_capable(hdev))
577 link_policy |= HCI_LP_RSWITCH;
578 if (lmp_hold_capable(hdev))
579 link_policy |= HCI_LP_HOLD;
580 if (lmp_sniff_capable(hdev))
581 link_policy |= HCI_LP_SNIFF;
582 if (lmp_park_capable(hdev))
583 link_policy |= HCI_LP_PARK;
584
585 cp.policy = cpu_to_le16(link_policy);
42c6b129 586 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 587}
588
42c6b129 589static void hci_set_le_support(struct hci_request *req)
2177bab5 590{
42c6b129 591 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 592 struct hci_cp_write_le_host_supported cp;
593
c73eee91
JH		 594 /* LE-only devices do not support explicit enablement */
595 if (!lmp_bredr_capable(hdev))
596 return;
597
2177bab5
JH		 598 memset(&cp, 0, sizeof(cp));
599
600 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
601 cp.le = 0x01;
602 cp.simul = lmp_le_br_capable(hdev);
603 }
604
605 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 606 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
607 &cp);
2177bab5
JH		 608}
609
42c6b129 610static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 611{
42c6b129 612 struct hci_dev *hdev = req->hdev;
d2c5d77f 613 u8 p;
42c6b129 614
b8f4e068
GP		 615 /* Some Broadcom based Bluetooth controllers do not support the
616 * Delete Stored Link Key command. They are clearly indicating its
617 * absence in the bit mask of supported commands.
618 *
619 * Check the supported commands and only if the the command is marked
620 * as supported send it. If not supported assume that the controller
621 * does not have actual support for stored link keys which makes this
622 * command redundant anyway.
637b4cae 623 */
59f45d57
JH		 624 if (hdev->commands[6] & 0x80) {
625 struct hci_cp_delete_stored_link_key cp;
626
627 bacpy(&cp.bdaddr, BDADDR_ANY);
628 cp.delete_all = 0x01;
629 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
630 sizeof(cp), &cp);
631 }
632
2177bab5 633 if (hdev->commands[5] & 0x10)
42c6b129 634 hci_setup_link_policy(req);
2177bab5 635
04b4edcb 636 if (lmp_le_capable(hdev)) {
42c6b129 637 hci_set_le_support(req);
04b4edcb
JH		 638 hci_update_ad(req);
639 }
d2c5d77f
JH		 640
641 /* Read features beyond page 1 if available */
642 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
643 struct hci_cp_read_local_ext_features cp;
644
645 cp.page = p;
646 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
647 sizeof(cp), &cp);
648 }
2177bab5
JH		 649}
650
5d4e7e8d
JH		 651static void hci_init4_req(struct hci_request *req, unsigned long opt)
652{
653 struct hci_dev *hdev = req->hdev;
654
655 /* Check for Synchronization Train support */
656 if (hdev->features[2][0] & 0x04)
657 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
658}
659
2177bab5
JH		 660static int __hci_init(struct hci_dev *hdev)
661{
662 int err;
663
664 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
665 if (err < 0)
666 return err;
667
668 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
669 * BR/EDR/LE type controllers. AMP controllers only need the
670 * first stage init.
671 */
672 if (hdev->dev_type != HCI_BREDR)
673 return 0;
674
675 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
676 if (err < 0)
677 return err;
678
5d4e7e8d
JH		 679 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
680 if (err < 0)
681 return err;
682
683 return __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
2177bab5
JH		 684}
685
42c6b129 686static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 687{
688 __u8 scan = opt;
689
42c6b129 690 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 691
692 /* Inquiry and Page scans */
42c6b129 693 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 694}
695
42c6b129 696static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 697{
698 __u8 auth = opt;
699
42c6b129 700 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 701
702 /* Authentication */
42c6b129 703 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 704}
705
42c6b129 706static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 707{
708 __u8 encrypt = opt;
709
42c6b129 710 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 711
e4e8e37c 712 /* Encryption */
42c6b129 713 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 714}
715
42c6b129 716static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 717{
718 __le16 policy = cpu_to_le16(opt);
719
42c6b129 720 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 721
722 /* Default link policy */
42c6b129 723 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 724}
725
8e87d142 726/* Get HCI device by index.
1da177e4
LT		 727 * Device is held on return. */
728struct hci_dev *hci_dev_get(int index)
729{
8035ded4 730 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 731
732 BT_DBG("%d", index);
733
734 if (index < 0)
735 return NULL;
736
737 read_lock(&hci_dev_list_lock);
8035ded4 738 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 739 if (d->id == index) {
740 hdev = hci_dev_hold(d);
741 break;
742 }
743 }
744 read_unlock(&hci_dev_list_lock);
745 return hdev;
746}
1da177e4
LT		 747
748/* ---- Inquiry support ---- */
ff9ef578 749
30dc78e1
JH		 750bool hci_discovery_active(struct hci_dev *hdev)
751{
752 struct discovery_state *discov = &hdev->discovery;
753
6fbe195d 754 switch (discov->state) {
343f935b 755 case DISCOVERY_FINDING:
6fbe195d 756 case DISCOVERY_RESOLVING:
30dc78e1
JH		 757 return true;
758
6fbe195d
AG		 759 default:
760 return false;
761 }
30dc78e1
JH		 762}
763
ff9ef578
JH		 764void hci_discovery_set_state(struct hci_dev *hdev, int state)
765{
766 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
767
768 if (hdev->discovery.state == state)
769 return;
770
771 switch (state) {
772 case DISCOVERY_STOPPED:
7b99b659
AG		 773 if (hdev->discovery.state != DISCOVERY_STARTING)
774 mgmt_discovering(hdev, 0);
ff9ef578
JH		 775 break;
776 case DISCOVERY_STARTING:
777 break;
343f935b 778 case DISCOVERY_FINDING:
ff9ef578
JH		 779 mgmt_discovering(hdev, 1);
780 break;
30dc78e1
JH		 781 case DISCOVERY_RESOLVING:
782 break;
ff9ef578
JH		 783 case DISCOVERY_STOPPING:
784 break;
785 }
786
787 hdev->discovery.state = state;
788}
789
1f9b9a5d 790void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 791{
30883512 792 struct discovery_state *cache = &hdev->discovery;
b57c1a56 793 struct inquiry_entry *p, *n;
1da177e4 794
561aafbc
JH		 795 list_for_each_entry_safe(p, n, &cache->all, all) {
796 list_del(&p->all);
b57c1a56 797 kfree(p);
1da177e4 798 }
561aafbc
JH		 799
800 INIT_LIST_HEAD(&cache->unknown);
801 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 802}
803
a8c5fb1a
GP		 804struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
805 bdaddr_t *bdaddr)
1da177e4 806{
30883512 807 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 808 struct inquiry_entry *e;
809
6ed93dc6 810 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 811
561aafbc
JH		 812 list_for_each_entry(e, &cache->all, all) {
813 if (!bacmp(&e->data.bdaddr, bdaddr))
814 return e;
815 }
816
817 return NULL;
818}
819
820struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 821 bdaddr_t *bdaddr)
561aafbc 822{
30883512 823 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 824 struct inquiry_entry *e;
825
6ed93dc6 826 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 827
828 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 829 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 830 return e;
831 }
832
833 return NULL;
1da177e4
LT		 834}
835
30dc78e1 836struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 837 bdaddr_t *bdaddr,
838 int state)
30dc78e1
JH		 839{
840 struct discovery_state *cache = &hdev->discovery;
841 struct inquiry_entry *e;
842
6ed93dc6 843 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 844
845 list_for_each_entry(e, &cache->resolve, list) {
846 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
847 return e;
848 if (!bacmp(&e->data.bdaddr, bdaddr))
849 return e;
850 }
851
852 return NULL;
853}
854
a3d4e20a 855void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 856 struct inquiry_entry *ie)
a3d4e20a
JH		 857{
858 struct discovery_state *cache = &hdev->discovery;
859 struct list_head *pos = &cache->resolve;
860 struct inquiry_entry *p;
861
862 list_del(&ie->list);
863
864 list_for_each_entry(p, &cache->resolve, list) {
865 if (p->name_state != NAME_PENDING &&
a8c5fb1a 866 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 867 break;
868 pos = &p->list;
869 }
870
871 list_add(&ie->list, pos);
872}
873
3175405b 874bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 875 bool name_known, bool *ssp)
1da177e4 876{
30883512 877 struct discovery_state *cache = &hdev->discovery;
70f23020 878 struct inquiry_entry *ie;
1da177e4 879
6ed93dc6 880 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 881
2b2fec4d
SJ		 882 hci_remove_remote_oob_data(hdev, &data->bdaddr);
883
388fc8fa
JH		 884 if (ssp)
885 *ssp = data->ssp_mode;
886
70f23020 887 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 888 if (ie) {
388fc8fa
JH		 889 if (ie->data.ssp_mode && ssp)
890 *ssp = true;
891
a3d4e20a 892 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 893 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 894 ie->data.rssi = data->rssi;
895 hci_inquiry_cache_update_resolve(hdev, ie);
896 }
897
561aafbc 898 goto update;
a3d4e20a 899 }
561aafbc
JH		 900
901 /* Entry not in the cache. Add new one. */
902 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
903 if (!ie)
3175405b 904 return false;
561aafbc
JH		 905
906 list_add(&ie->all, &cache->all);
907
908 if (name_known) {
909 ie->name_state = NAME_KNOWN;
910 } else {
911 ie->name_state = NAME_NOT_KNOWN;
912 list_add(&ie->list, &cache->unknown);
913 }
70f23020 914
561aafbc
JH		 915update:
916 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 917 ie->name_state != NAME_PENDING) {
561aafbc
JH		 918 ie->name_state = NAME_KNOWN;
919 list_del(&ie->list);
1da177e4
LT		 920 }
921
70f23020
AE		 922 memcpy(&ie->data, data, sizeof(*data));
923 ie->timestamp = jiffies;
1da177e4 924 cache->timestamp = jiffies;
3175405b
JH		 925
926 if (ie->name_state == NAME_NOT_KNOWN)
927 return false;
928
929 return true;
1da177e4
LT		 930}
931
932static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
933{
30883512 934 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 935 struct inquiry_info *info = (struct inquiry_info *) buf;
936 struct inquiry_entry *e;
937 int copied = 0;
938
561aafbc 939 list_for_each_entry(e, &cache->all, all) {
1da177e4 940 struct inquiry_data *data = &e->data;
b57c1a56
JH		 941
942 if (copied >= num)
943 break;
944
1da177e4
LT		 945 bacpy(&info->bdaddr, &data->bdaddr);
946 info->pscan_rep_mode = data->pscan_rep_mode;
947 info->pscan_period_mode = data->pscan_period_mode;
948 info->pscan_mode = data->pscan_mode;
949 memcpy(info->dev_class, data->dev_class, 3);
950 info->clock_offset = data->clock_offset;
b57c1a56 951
1da177e4 952 info++;
b57c1a56 953 copied++;
1da177e4
LT		 954 }
955
956 BT_DBG("cache %p, copied %d", cache, copied);
957 return copied;
958}
959
42c6b129 960static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 961{
962 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 963 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 964 struct hci_cp_inquiry cp;
965
966 BT_DBG("%s", hdev->name);
967
968 if (test_bit(HCI_INQUIRY, &hdev->flags))
969 return;
970
971 /* Start Inquiry */
972 memcpy(&cp.lap, &ir->lap, 3);
973 cp.length = ir->length;
974 cp.num_rsp = ir->num_rsp;
42c6b129 975 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 976}
977
3e13fa1e
AG		 978static int wait_inquiry(void *word)
979{
980 schedule();
981 return signal_pending(current);
982}
983
1da177e4
LT		 984int hci_inquiry(void __user *arg)
985{
986 __u8 __user *ptr = arg;
987 struct hci_inquiry_req ir;
988 struct hci_dev *hdev;
989 int err = 0, do_inquiry = 0, max_rsp;
990 long timeo;
991 __u8 *buf;
992
993 if (copy_from_user(&ir, ptr, sizeof(ir)))
994 return -EFAULT;
995
5a08ecce
AE		 996 hdev = hci_dev_get(ir.dev_id);
997 if (!hdev)
1da177e4
LT		 998 return -ENODEV;
999
0736cfa8
MH		 1000 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1001 err = -EBUSY;
1002 goto done;
1003 }
1004
09fd0de5 1005 hci_dev_lock(hdev);
8e87d142 1006 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 1007 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 1008 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 1009 do_inquiry = 1;
1010 }
09fd0de5 1011 hci_dev_unlock(hdev);
1da177e4 1012
04837f64 1013 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 1014
1015 if (do_inquiry) {
01178cd4
JH		 1016 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1017 timeo);
70f23020
AE		 1018 if (err < 0)
1019 goto done;
3e13fa1e
AG		 1020
1021 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1022 * cleared). If it is interrupted by a signal, return -EINTR.
1023 */
1024 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
1025 TASK_INTERRUPTIBLE))
1026 return -EINTR;
70f23020 1027 }
1da177e4 1028
8fc9ced3
GP		 1029 /* for unlimited number of responses we will use buffer with
1030 * 255 entries
1031 */
1da177e4
LT		 1032 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1033
1034 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1035 * copy it to the user space.
1036 */
01df8c31 1037 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1038 if (!buf) {
1da177e4
LT		 1039 err = -ENOMEM;
1040 goto done;
1041 }
1042
09fd0de5 1043 hci_dev_lock(hdev);
1da177e4 1044 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1045 hci_dev_unlock(hdev);
1da177e4
LT		 1046
1047 BT_DBG("num_rsp %d", ir.num_rsp);
1048
1049 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1050 ptr += sizeof(ir);
1051 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1052 ir.num_rsp))
1da177e4 1053 err = -EFAULT;
8e87d142 1054 } else
1da177e4
LT		 1055 err = -EFAULT;
1056
1057 kfree(buf);
1058
1059done:
1060 hci_dev_put(hdev);
1061 return err;
1062}
1063
3f0f524b
JH		 1064static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1065{
1066 u8 ad_len = 0, flags = 0;
1067 size_t name_len;
1068
1069 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1070 flags |= LE_AD_GENERAL;
1071
1072 if (!lmp_bredr_capable(hdev))
1073 flags |= LE_AD_NO_BREDR;
1074
1075 if (lmp_le_br_capable(hdev))
1076 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1077
1078 if (lmp_host_le_br_capable(hdev))
1079 flags |= LE_AD_SIM_LE_BREDR_HOST;
1080
1081 if (flags) {
1082 BT_DBG("adv flags 0x%02x", flags);
1083
1084 ptr[0] = 2;
1085 ptr[1] = EIR_FLAGS;
1086 ptr[2] = flags;
1087
1088 ad_len += 3;
1089 ptr += 3;
1090 }
1091
1092 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1093 ptr[0] = 2;
1094 ptr[1] = EIR_TX_POWER;
1095 ptr[2] = (u8) hdev->adv_tx_power;
1096
1097 ad_len += 3;
1098 ptr += 3;
1099 }
1100
1101 name_len = strlen(hdev->dev_name);
1102 if (name_len > 0) {
1103 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1104
1105 if (name_len > max_len) {
1106 name_len = max_len;
1107 ptr[1] = EIR_NAME_SHORT;
1108 } else
1109 ptr[1] = EIR_NAME_COMPLETE;
1110
1111 ptr[0] = name_len + 1;
1112
1113 memcpy(ptr + 2, hdev->dev_name, name_len);
1114
1115 ad_len += (name_len + 2);
1116 ptr += (name_len + 2);
1117 }
1118
1119 return ad_len;
1120}
1121
04b4edcb 1122void hci_update_ad(struct hci_request *req)
3f0f524b 1123{
04b4edcb 1124 struct hci_dev *hdev = req->hdev;
3f0f524b
JH		 1125 struct hci_cp_le_set_adv_data cp;
1126 u8 len;
3f0f524b 1127
04b4edcb
JH		 1128 if (!lmp_le_capable(hdev))
1129 return;
3f0f524b
JH		 1130
1131 memset(&cp, 0, sizeof(cp));
1132
1133 len = create_ad(hdev, cp.data);
1134
1135 if (hdev->adv_data_len == len &&
04b4edcb
JH		 1136 memcmp(cp.data, hdev->adv_data, len) == 0)
1137 return;
3f0f524b
JH		 1138
1139 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1140 hdev->adv_data_len = len;
1141
1142 cp.length = len;
3f0f524b 1143
04b4edcb 1144 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH		 1145}
1146
1da177e4
LT		 1147/* ---- HCI ioctl helpers ---- */
1148
1149int hci_dev_open(__u16 dev)
1150{
1151 struct hci_dev *hdev;
1152 int ret = 0;
1153
5a08ecce
AE		 1154 hdev = hci_dev_get(dev);
1155 if (!hdev)
1da177e4
LT		 1156 return -ENODEV;
1157
1158 BT_DBG("%s %p", hdev->name, hdev);
1159
1160 hci_req_lock(hdev);
1161
94324962
JH		 1162 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1163 ret = -ENODEV;
1164 goto done;
1165 }
1166
611b30f7
MH		 1167 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
1168 ret = -ERFKILL;
1169 goto done;
1170 }
1171
1da177e4
LT		 1172 if (test_bit(HCI_UP, &hdev->flags)) {
1173 ret = -EALREADY;
1174 goto done;
1175 }
1176
1da177e4
LT		 1177 if (hdev->open(hdev)) {
1178 ret = -EIO;
1179 goto done;
1180 }
1181
f41c70c4
MH		 1182 atomic_set(&hdev->cmd_cnt, 1);
1183 set_bit(HCI_INIT, &hdev->flags);
1184
1185 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1186 ret = hdev->setup(hdev);
1187
1188 if (!ret) {
1189 /* Treat all non BR/EDR controllers as raw devices if
1190 * enable_hs is not set.
1191 */
1192 if (hdev->dev_type != HCI_BREDR && !enable_hs)
1193 set_bit(HCI_RAW, &hdev->flags);
1194
1195 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1196 set_bit(HCI_RAW, &hdev->flags);
1197
0736cfa8
MH		 1198 if (!test_bit(HCI_RAW, &hdev->flags) &&
1199 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
f41c70c4 1200 ret = __hci_init(hdev);
1da177e4
LT		 1201 }
1202
f41c70c4
MH		 1203 clear_bit(HCI_INIT, &hdev->flags);
1204
1da177e4
LT		 1205 if (!ret) {
1206 hci_dev_hold(hdev);
1207 set_bit(HCI_UP, &hdev->flags);
1208 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a 1209 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
0736cfa8 1210 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
bb4b2a9a 1211 mgmt_valid_hdev(hdev)) {
09fd0de5 1212 hci_dev_lock(hdev);
744cf19e 1213 mgmt_powered(hdev, 1);
09fd0de5 1214 hci_dev_unlock(hdev);
56e5cb86 1215 }
8e87d142 1216 } else {
1da177e4 1217 /* Init failed, cleanup */
3eff45ea 1218 flush_work(&hdev->tx_work);
c347b765 1219 flush_work(&hdev->cmd_work);
b78752cc 1220 flush_work(&hdev->rx_work);
1da177e4
LT		 1221
1222 skb_queue_purge(&hdev->cmd_q);
1223 skb_queue_purge(&hdev->rx_q);
1224
1225 if (hdev->flush)
1226 hdev->flush(hdev);
1227
1228 if (hdev->sent_cmd) {
1229 kfree_skb(hdev->sent_cmd);
1230 hdev->sent_cmd = NULL;
1231 }
1232
1233 hdev->close(hdev);
1234 hdev->flags = 0;
1235 }
1236
1237done:
1238 hci_req_unlock(hdev);
1239 hci_dev_put(hdev);
1240 return ret;
1241}
1242
1243static int hci_dev_do_close(struct hci_dev *hdev)
1244{
1245 BT_DBG("%s %p", hdev->name, hdev);
1246
78c04c0b
VCG		 1247 cancel_delayed_work(&hdev->power_off);
1248
1da177e4
LT		 1249 hci_req_cancel(hdev, ENODEV);
1250 hci_req_lock(hdev);
1251
1252 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1253 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1254 hci_req_unlock(hdev);
1255 return 0;
1256 }
1257
3eff45ea
GP		 1258 /* Flush RX and TX works */
1259 flush_work(&hdev->tx_work);
b78752cc 1260 flush_work(&hdev->rx_work);
1da177e4 1261
16ab91ab 1262 if (hdev->discov_timeout > 0) {
e0f9309f 1263 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1264 hdev->discov_timeout = 0;
5e5282bb 1265 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1266 }
1267
a8b2d5c2 1268 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1269 cancel_delayed_work(&hdev->service_cache);
1270
7ba8b4be
AG		 1271 cancel_delayed_work_sync(&hdev->le_scan_disable);
1272
09fd0de5 1273 hci_dev_lock(hdev);
1f9b9a5d 1274 hci_inquiry_cache_flush(hdev);
1da177e4 1275 hci_conn_hash_flush(hdev);
09fd0de5 1276 hci_dev_unlock(hdev);
1da177e4
LT		 1277
1278 hci_notify(hdev, HCI_DEV_DOWN);
1279
1280 if (hdev->flush)
1281 hdev->flush(hdev);
1282
1283 /* Reset device */
1284 skb_queue_purge(&hdev->cmd_q);
1285 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1286 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1287 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1288 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1289 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1290 clear_bit(HCI_INIT, &hdev->flags);
1291 }
1292
c347b765
GP		 1293 /* flush cmd work */
1294 flush_work(&hdev->cmd_work);
1da177e4
LT		 1295
1296 /* Drop queues */
1297 skb_queue_purge(&hdev->rx_q);
1298 skb_queue_purge(&hdev->cmd_q);
1299 skb_queue_purge(&hdev->raw_q);
1300
1301 /* Drop last sent command */
1302 if (hdev->sent_cmd) {
b79f44c1 1303 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1304 kfree_skb(hdev->sent_cmd);
1305 hdev->sent_cmd = NULL;
1306 }
1307
b6ddb638
JH		 1308 kfree_skb(hdev->recv_evt);
1309 hdev->recv_evt = NULL;
1310
1da177e4
LT		 1311 /* After this point our queues are empty
1312 * and no tasks are scheduled. */
1313 hdev->close(hdev);
1314
35b973c9
JH		 1315 /* Clear flags */
1316 hdev->flags = 0;
1317 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1318
bb4b2a9a
AE		 1319 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1320 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 1321 hci_dev_lock(hdev);
1322 mgmt_powered(hdev, 0);
1323 hci_dev_unlock(hdev);
1324 }
5add6af8 1325
ced5c338
AE		 1326 /* Controller radio is available but is currently powered down */
1327 hdev->amp_status = 0;
1328
e59fda8d 1329 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1330 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1331
1da177e4
LT		 1332 hci_req_unlock(hdev);
1333
1334 hci_dev_put(hdev);
1335 return 0;
1336}
1337
1338int hci_dev_close(__u16 dev)
1339{
1340 struct hci_dev *hdev;
1341 int err;
1342
70f23020
AE		 1343 hdev = hci_dev_get(dev);
1344 if (!hdev)
1da177e4 1345 return -ENODEV;
8ee56540 1346
0736cfa8
MH		 1347 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1348 err = -EBUSY;
1349 goto done;
1350 }
1351
8ee56540
MH		 1352 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1353 cancel_delayed_work(&hdev->power_off);
1354
1da177e4 1355 err = hci_dev_do_close(hdev);
8ee56540 1356
0736cfa8 1357done:
1da177e4
LT		 1358 hci_dev_put(hdev);
1359 return err;
1360}
1361
1362int hci_dev_reset(__u16 dev)
1363{
1364 struct hci_dev *hdev;
1365 int ret = 0;
1366
70f23020
AE		 1367 hdev = hci_dev_get(dev);
1368 if (!hdev)
1da177e4
LT		 1369 return -ENODEV;
1370
1371 hci_req_lock(hdev);
1da177e4 1372
808a049e
MH		 1373 if (!test_bit(HCI_UP, &hdev->flags)) {
1374 ret = -ENETDOWN;
1da177e4 1375 goto done;
808a049e 1376 }
1da177e4 1377
0736cfa8
MH		 1378 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1379 ret = -EBUSY;
1380 goto done;
1381 }
1382
1da177e4
LT		 1383 /* Drop queues */
1384 skb_queue_purge(&hdev->rx_q);
1385 skb_queue_purge(&hdev->cmd_q);
1386
09fd0de5 1387 hci_dev_lock(hdev);
1f9b9a5d 1388 hci_inquiry_cache_flush(hdev);
1da177e4 1389 hci_conn_hash_flush(hdev);
09fd0de5 1390 hci_dev_unlock(hdev);
1da177e4
LT		 1391
1392 if (hdev->flush)
1393 hdev->flush(hdev);
1394
8e87d142 1395 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1396 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1397
1398 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1399 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1400
1401done:
1da177e4
LT		 1402 hci_req_unlock(hdev);
1403 hci_dev_put(hdev);
1404 return ret;
1405}
1406
1407int hci_dev_reset_stat(__u16 dev)
1408{
1409 struct hci_dev *hdev;
1410 int ret = 0;
1411
70f23020
AE		 1412 hdev = hci_dev_get(dev);
1413 if (!hdev)
1da177e4
LT		 1414 return -ENODEV;
1415
0736cfa8
MH		 1416 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1417 ret = -EBUSY;
1418 goto done;
1419 }
1420
1da177e4
LT		 1421 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1422
0736cfa8 1423done:
1da177e4 1424 hci_dev_put(hdev);
1da177e4
LT		 1425 return ret;
1426}
1427
1428int hci_dev_cmd(unsigned int cmd, void __user *arg)
1429{
1430 struct hci_dev *hdev;
1431 struct hci_dev_req dr;
1432 int err = 0;
1433
1434 if (copy_from_user(&dr, arg, sizeof(dr)))
1435 return -EFAULT;
1436
70f23020
AE		 1437 hdev = hci_dev_get(dr.dev_id);
1438 if (!hdev)
1da177e4
LT		 1439 return -ENODEV;
1440
0736cfa8
MH		 1441 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1442 err = -EBUSY;
1443 goto done;
1444 }
1445
1da177e4
LT		 1446 switch (cmd) {
1447 case HCISETAUTH:
01178cd4
JH		 1448 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1449 HCI_INIT_TIMEOUT);
1da177e4
LT		 1450 break;
1451
1452 case HCISETENCRYPT:
1453 if (!lmp_encrypt_capable(hdev)) {
1454 err = -EOPNOTSUPP;
1455 break;
1456 }
1457
1458 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1459 /* Auth must be enabled first */
01178cd4
JH		 1460 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1461 HCI_INIT_TIMEOUT);
1da177e4
LT		 1462 if (err)
1463 break;
1464 }
1465
01178cd4
JH		 1466 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1467 HCI_INIT_TIMEOUT);
1da177e4
LT		 1468 break;
1469
1470 case HCISETSCAN:
01178cd4
JH		 1471 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1472 HCI_INIT_TIMEOUT);
1da177e4
LT		 1473 break;
1474
1da177e4 1475 case HCISETLINKPOL:
01178cd4
JH		 1476 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1477 HCI_INIT_TIMEOUT);
1da177e4
LT		 1478 break;
1479
1480 case HCISETLINKMODE:
e4e8e37c
MH		 1481 hdev->link_mode = ((__u16) dr.dev_opt) &
1482 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1483 break;
1484
1485 case HCISETPTYPE:
1486 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1487 break;
1488
1489 case HCISETACLMTU:
e4e8e37c
MH		 1490 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1491 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1492 break;
1493
1494 case HCISETSCOMTU:
e4e8e37c
MH		 1495 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1496 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1497 break;
1498
1499 default:
1500 err = -EINVAL;
1501 break;
1502 }
e4e8e37c 1503
0736cfa8 1504done:
1da177e4
LT		 1505 hci_dev_put(hdev);
1506 return err;
1507}
1508
1509int hci_get_dev_list(void __user *arg)
1510{
8035ded4 1511 struct hci_dev *hdev;
1da177e4
LT		 1512 struct hci_dev_list_req *dl;
1513 struct hci_dev_req *dr;
1da177e4
LT		 1514 int n = 0, size, err;
1515 __u16 dev_num;
1516
1517 if (get_user(dev_num, (__u16 __user *) arg))
1518 return -EFAULT;
1519
1520 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1521 return -EINVAL;
1522
1523 size = sizeof(*dl) + dev_num * sizeof(*dr);
1524
70f23020
AE		 1525 dl = kzalloc(size, GFP_KERNEL);
1526 if (!dl)
1da177e4
LT		 1527 return -ENOMEM;
1528
1529 dr = dl->dev_req;
1530
f20d09d5 1531 read_lock(&hci_dev_list_lock);
8035ded4 1532 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1533 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1534 cancel_delayed_work(&hdev->power_off);
c542a06c 1535
a8b2d5c2
JH		 1536 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1537 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1538
1da177e4
LT		 1539 (dr + n)->dev_id = hdev->id;
1540 (dr + n)->dev_opt = hdev->flags;
c542a06c 1541
1da177e4
LT		 1542 if (++n >= dev_num)
1543 break;
1544 }
f20d09d5 1545 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1546
1547 dl->dev_num = n;
1548 size = sizeof(*dl) + n * sizeof(*dr);
1549
1550 err = copy_to_user(arg, dl, size);
1551 kfree(dl);
1552
1553 return err ? -EFAULT : 0;
1554}
1555
1556int hci_get_dev_info(void __user *arg)
1557{
1558 struct hci_dev *hdev;
1559 struct hci_dev_info di;
1560 int err = 0;
1561
1562 if (copy_from_user(&di, arg, sizeof(di)))
1563 return -EFAULT;
1564
70f23020
AE		 1565 hdev = hci_dev_get(di.dev_id);
1566 if (!hdev)
1da177e4
LT		 1567 return -ENODEV;
1568
a8b2d5c2 1569 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1570 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1571
a8b2d5c2
JH		 1572 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1573 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1574
1da177e4
LT		 1575 strcpy(di.name, hdev->name);
1576 di.bdaddr = hdev->bdaddr;
943da25d 1577 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1578 di.flags = hdev->flags;
1579 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1580 if (lmp_bredr_capable(hdev)) {
1581 di.acl_mtu = hdev->acl_mtu;
1582 di.acl_pkts = hdev->acl_pkts;
1583 di.sco_mtu = hdev->sco_mtu;
1584 di.sco_pkts = hdev->sco_pkts;
1585 } else {
1586 di.acl_mtu = hdev->le_mtu;
1587 di.acl_pkts = hdev->le_pkts;
1588 di.sco_mtu = 0;
1589 di.sco_pkts = 0;
1590 }
1da177e4
LT		 1591 di.link_policy = hdev->link_policy;
1592 di.link_mode = hdev->link_mode;
1593
1594 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1595 memcpy(&di.features, &hdev->features, sizeof(di.features));
1596
1597 if (copy_to_user(arg, &di, sizeof(di)))
1598 err = -EFAULT;
1599
1600 hci_dev_put(hdev);
1601
1602 return err;
1603}
1604
1605/* ---- Interface to HCI drivers ---- */
1606
611b30f7
MH		 1607static int hci_rfkill_set_block(void *data, bool blocked)
1608{
1609 struct hci_dev *hdev = data;
1610
1611 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1612
0736cfa8
MH		 1613 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
1614 return -EBUSY;
1615
611b30f7
MH		 1616 if (!blocked)
1617 return 0;
1618
1619 hci_dev_do_close(hdev);
1620
1621 return 0;
1622}
1623
1624static const struct rfkill_ops hci_rfkill_ops = {
1625 .set_block = hci_rfkill_set_block,
1626};
1627
ab81cbf9
JH		 1628static void hci_power_on(struct work_struct *work)
1629{
1630 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1631 int err;
ab81cbf9
JH		 1632
1633 BT_DBG("%s", hdev->name);
1634
96570ffc
JH		 1635 err = hci_dev_open(hdev->id);
1636 if (err < 0) {
1637 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1638 return;
96570ffc 1639 }
ab81cbf9 1640
a8b2d5c2 1641 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1642 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1643 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1644
a8b2d5c2 1645 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1646 mgmt_index_added(hdev);
ab81cbf9
JH		 1647}
1648
1649static void hci_power_off(struct work_struct *work)
1650{
3243553f 1651 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1652 power_off.work);
ab81cbf9
JH		 1653
1654 BT_DBG("%s", hdev->name);
1655
8ee56540 1656 hci_dev_do_close(hdev);
ab81cbf9
JH		 1657}
1658
16ab91ab
JH		 1659static void hci_discov_off(struct work_struct *work)
1660{
1661 struct hci_dev *hdev;
1662 u8 scan = SCAN_PAGE;
1663
1664 hdev = container_of(work, struct hci_dev, discov_off.work);
1665
1666 BT_DBG("%s", hdev->name);
1667
09fd0de5 1668 hci_dev_lock(hdev);
16ab91ab
JH		 1669
1670 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1671
1672 hdev->discov_timeout = 0;
1673
09fd0de5 1674 hci_dev_unlock(hdev);
16ab91ab
JH		 1675}
1676
2aeb9a1a
JH		 1677int hci_uuids_clear(struct hci_dev *hdev)
1678{
4821002c 1679 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1680
4821002c
JH		 1681 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1682 list_del(&uuid->list);
2aeb9a1a
JH		 1683 kfree(uuid);
1684 }
1685
1686 return 0;
1687}
1688
55ed8ca1
JH		 1689int hci_link_keys_clear(struct hci_dev *hdev)
1690{
1691 struct list_head *p, *n;
1692
1693 list_for_each_safe(p, n, &hdev->link_keys) {
1694 struct link_key *key;
1695
1696 key = list_entry(p, struct link_key, list);
1697
1698 list_del(p);
1699 kfree(key);
1700 }
1701
1702 return 0;
1703}
1704
b899efaf
VCG		 1705int hci_smp_ltks_clear(struct hci_dev *hdev)
1706{
1707 struct smp_ltk *k, *tmp;
1708
1709 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1710 list_del(&k->list);
1711 kfree(k);
1712 }
1713
1714 return 0;
1715}
1716
55ed8ca1
JH		 1717struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1718{
8035ded4 1719 struct link_key *k;
55ed8ca1 1720
8035ded4 1721 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1722 if (bacmp(bdaddr, &k->bdaddr) == 0)
1723 return k;
55ed8ca1
JH		 1724
1725 return NULL;
1726}
1727
745c0ce3 1728static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1729 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1730{
1731 /* Legacy key */
1732 if (key_type < 0x03)
745c0ce3 1733 return true;
d25e28ab
JH		 1734
1735 /* Debug keys are insecure so don't store them persistently */
1736 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1737 return false;
d25e28ab
JH		 1738
1739 /* Changed combination key and there's no previous one */
1740 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1741 return false;
d25e28ab
JH		 1742
1743 /* Security mode 3 case */
1744 if (!conn)
745c0ce3 1745 return true;
d25e28ab
JH		 1746
1747 /* Neither local nor remote side had no-bonding as requirement */
1748 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1749 return true;
d25e28ab
JH		 1750
1751 /* Local side had dedicated bonding as requirement */
1752 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1753 return true;
d25e28ab
JH		 1754
1755 /* Remote side had dedicated bonding as requirement */
1756 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1757 return true;
d25e28ab
JH		 1758
1759 /* If none of the above criteria match, then don't store the key
1760 * persistently */
745c0ce3 1761 return false;
d25e28ab
JH		 1762}
1763
c9839a11 1764struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1765{
c9839a11 1766 struct smp_ltk *k;
75d262c2 1767
c9839a11
VCG		 1768 list_for_each_entry(k, &hdev->long_term_keys, list) {
1769 if (k->ediv != ediv ||
a8c5fb1a 1770 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1771 continue;
1772
c9839a11 1773 return k;
75d262c2
VCG		 1774 }
1775
1776 return NULL;
1777}
75d262c2 1778
c9839a11 1779struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1780 u8 addr_type)
75d262c2 1781{
c9839a11 1782 struct smp_ltk *k;
75d262c2 1783
c9839a11
VCG		 1784 list_for_each_entry(k, &hdev->long_term_keys, list)
1785 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1786 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1787 return k;
1788
1789 return NULL;
1790}
75d262c2 1791
d25e28ab 1792int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1793 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1794{
1795 struct link_key *key, *old_key;
745c0ce3
VA		 1796 u8 old_key_type;
1797 bool persistent;
55ed8ca1
JH		 1798
1799 old_key = hci_find_link_key(hdev, bdaddr);
1800 if (old_key) {
1801 old_key_type = old_key->type;
1802 key = old_key;
1803 } else {
12adcf3a 1804 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1805 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1806 if (!key)
1807 return -ENOMEM;
1808 list_add(&key->list, &hdev->link_keys);
1809 }
1810
6ed93dc6 1811 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1812
d25e28ab
JH		 1813 /* Some buggy controller combinations generate a changed
1814 * combination key for legacy pairing even when there's no
1815 * previous key */
1816 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1817 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1818 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1819 if (conn)
1820 conn->key_type = type;
1821 }
d25e28ab 1822
55ed8ca1 1823 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1824 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1825 key->pin_len = pin_len;
1826
b6020ba0 1827 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1828 key->type = old_key_type;
4748fed2
JH		 1829 else
1830 key->type = type;
1831
4df378a1
JH		 1832 if (!new_key)
1833 return 0;
1834
1835 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1836
744cf19e 1837 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1838
6ec5bcad
VA		 1839 if (conn)
1840 conn->flush_key = !persistent;
55ed8ca1
JH		 1841
1842 return 0;
1843}
1844
c9839a11 1845int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1846 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1847 ediv, u8 rand[8])
75d262c2 1848{
c9839a11 1849 struct smp_ltk *key, *old_key;
75d262c2 1850
c9839a11
VCG		 1851 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1852 return 0;
75d262c2 1853
c9839a11
VCG		 1854 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1855 if (old_key)
75d262c2 1856 key = old_key;
c9839a11
VCG		 1857 else {
1858 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1859 if (!key)
1860 return -ENOMEM;
c9839a11 1861 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1862 }
1863
75d262c2 1864 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1865 key->bdaddr_type = addr_type;
1866 memcpy(key->val, tk, sizeof(key->val));
1867 key->authenticated = authenticated;
1868 key->ediv = ediv;
1869 key->enc_size = enc_size;
1870 key->type = type;
1871 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1872
c9839a11
VCG		 1873 if (!new_key)
1874 return 0;
75d262c2 1875
261cc5aa
VCG		 1876 if (type & HCI_SMP_LTK)
1877 mgmt_new_ltk(hdev, key, 1);
1878
75d262c2
VCG		 1879 return 0;
1880}
1881
55ed8ca1
JH		 1882int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1883{
1884 struct link_key *key;
1885
1886 key = hci_find_link_key(hdev, bdaddr);
1887 if (!key)
1888 return -ENOENT;
1889
6ed93dc6 1890 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1891
1892 list_del(&key->list);
1893 kfree(key);
1894
1895 return 0;
1896}
1897
b899efaf
VCG		 1898int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1899{
1900 struct smp_ltk *k, *tmp;
1901
1902 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1903 if (bacmp(bdaddr, &k->bdaddr))
1904 continue;
1905
6ed93dc6 1906 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1907
1908 list_del(&k->list);
1909 kfree(k);
1910 }
1911
1912 return 0;
1913}
1914
6bd32326 1915/* HCI command timer function */
bda4f23a 1916static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1917{
1918 struct hci_dev *hdev = (void *) arg;
1919
bda4f23a
AE		 1920 if (hdev->sent_cmd) {
1921 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1922 u16 opcode = __le16_to_cpu(sent->opcode);
1923
1924 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1925 } else {
1926 BT_ERR("%s command tx timeout", hdev->name);
1927 }
1928
6bd32326 1929 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1930 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1931}
1932
2763eda6 1933struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1934 bdaddr_t *bdaddr)
2763eda6
SJ		 1935{
1936 struct oob_data *data;
1937
1938 list_for_each_entry(data, &hdev->remote_oob_data, list)
1939 if (bacmp(bdaddr, &data->bdaddr) == 0)
1940 return data;
1941
1942 return NULL;
1943}
1944
1945int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1946{
1947 struct oob_data *data;
1948
1949 data = hci_find_remote_oob_data(hdev, bdaddr);
1950 if (!data)
1951 return -ENOENT;
1952
6ed93dc6 1953 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1954
1955 list_del(&data->list);
1956 kfree(data);
1957
1958 return 0;
1959}
1960
1961int hci_remote_oob_data_clear(struct hci_dev *hdev)
1962{
1963 struct oob_data *data, *n;
1964
1965 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1966 list_del(&data->list);
1967 kfree(data);
1968 }
1969
1970 return 0;
1971}
1972
1973int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1974 u8 *randomizer)
2763eda6
SJ		 1975{
1976 struct oob_data *data;
1977
1978 data = hci_find_remote_oob_data(hdev, bdaddr);
1979
1980 if (!data) {
1981 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1982 if (!data)
1983 return -ENOMEM;
1984
1985 bacpy(&data->bdaddr, bdaddr);
1986 list_add(&data->list, &hdev->remote_oob_data);
1987 }
1988
1989 memcpy(data->hash, hash, sizeof(data->hash));
1990 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1991
6ed93dc6 1992 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1993
1994 return 0;
1995}
1996
04124681 1997struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1998{
8035ded4 1999 struct bdaddr_list *b;
b2a66aad 2000
8035ded4 2001 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 2002 if (bacmp(bdaddr, &b->bdaddr) == 0)
2003 return b;
b2a66aad
AJ		 2004
2005 return NULL;
2006}
2007
2008int hci_blacklist_clear(struct hci_dev *hdev)
2009{
2010 struct list_head *p, *n;
2011
2012 list_for_each_safe(p, n, &hdev->blacklist) {
2013 struct bdaddr_list *b;
2014
2015 b = list_entry(p, struct bdaddr_list, list);
2016
2017 list_del(p);
2018 kfree(b);
2019 }
2020
2021 return 0;
2022}
2023
88c1fe4b 2024int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2025{
2026 struct bdaddr_list *entry;
b2a66aad
AJ		 2027
2028 if (bacmp(bdaddr, BDADDR_ANY) == 0)
2029 return -EBADF;
2030
5e762444
AJ		 2031 if (hci_blacklist_lookup(hdev, bdaddr))
2032 return -EEXIST;
b2a66aad
AJ		 2033
2034 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 2035 if (!entry)
2036 return -ENOMEM;
b2a66aad
AJ		 2037
2038 bacpy(&entry->bdaddr, bdaddr);
2039
2040 list_add(&entry->list, &hdev->blacklist);
2041
88c1fe4b 2042 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 2043}
2044
88c1fe4b 2045int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2046{
2047 struct bdaddr_list *entry;
b2a66aad 2048
1ec918ce 2049 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 2050 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 2051
2052 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 2053 if (!entry)
5e762444 2054 return -ENOENT;
b2a66aad
AJ		 2055
2056 list_del(&entry->list);
2057 kfree(entry);
2058
88c1fe4b 2059 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 2060}
2061
4c87eaab 2062static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2063{
4c87eaab
AG		 2064 if (status) {
2065 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 2066
4c87eaab
AG		 2067 hci_dev_lock(hdev);
2068 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2069 hci_dev_unlock(hdev);
2070 return;
2071 }
7ba8b4be
AG		 2072}
2073
4c87eaab 2074static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2075{
4c87eaab
AG		 2076 /* General inquiry access code (GIAC) */
2077 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2078 struct hci_request req;
2079 struct hci_cp_inquiry cp;
7ba8b4be
AG		 2080 int err;
2081
4c87eaab
AG		 2082 if (status) {
2083 BT_ERR("Failed to disable LE scanning: status %d", status);
2084 return;
2085 }
7ba8b4be 2086
4c87eaab
AG		 2087 switch (hdev->discovery.type) {
2088 case DISCOV_TYPE_LE:
2089 hci_dev_lock(hdev);
2090 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2091 hci_dev_unlock(hdev);
2092 break;
7ba8b4be 2093
4c87eaab
AG		 2094 case DISCOV_TYPE_INTERLEAVED:
2095 hci_req_init(&req, hdev);
7ba8b4be 2096
4c87eaab
AG		 2097 memset(&cp, 0, sizeof(cp));
2098 memcpy(&cp.lap, lap, sizeof(cp.lap));
2099 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2100 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 2101
4c87eaab 2102 hci_dev_lock(hdev);
7dbfac1d 2103
4c87eaab 2104 hci_inquiry_cache_flush(hdev);
7dbfac1d 2105
4c87eaab
AG		 2106 err = hci_req_run(&req, inquiry_complete);
2107 if (err) {
2108 BT_ERR("Inquiry request failed: err %d", err);
2109 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2110 }
7dbfac1d 2111
4c87eaab
AG		 2112 hci_dev_unlock(hdev);
2113 break;
7dbfac1d 2114 }
7dbfac1d
AG		 2115}
2116
7ba8b4be
AG		 2117static void le_scan_disable_work(struct work_struct *work)
2118{
2119 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2120 le_scan_disable.work);
7ba8b4be 2121 struct hci_cp_le_set_scan_enable cp;
4c87eaab
AG		 2122 struct hci_request req;
2123 int err;
7ba8b4be
AG		 2124
2125 BT_DBG("%s", hdev->name);
2126
4c87eaab 2127 hci_req_init(&req, hdev);
28b75a89 2128
7ba8b4be 2129 memset(&cp, 0, sizeof(cp));
4c87eaab
AG		 2130 cp.enable = LE_SCAN_DISABLE;
2131 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
28b75a89 2132
4c87eaab
AG		 2133 err = hci_req_run(&req, le_scan_disable_work_complete);
2134 if (err)
2135 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 2136}
2137
9be0dab7
DH		 2138/* Alloc HCI device */
2139struct hci_dev *hci_alloc_dev(void)
2140{
2141 struct hci_dev *hdev;
2142
2143 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2144 if (!hdev)
2145 return NULL;
2146
b1b813d4
DH		 2147 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2148 hdev->esco_type = (ESCO_HV1);
2149 hdev->link_mode = (HCI_LM_ACCEPT);
2150 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 2151 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2152 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2153
b1b813d4
DH		 2154 hdev->sniff_max_interval = 800;
2155 hdev->sniff_min_interval = 80;
2156
2157 mutex_init(&hdev->lock);
2158 mutex_init(&hdev->req_lock);
2159
2160 INIT_LIST_HEAD(&hdev->mgmt_pending);
2161 INIT_LIST_HEAD(&hdev->blacklist);
2162 INIT_LIST_HEAD(&hdev->uuids);
2163 INIT_LIST_HEAD(&hdev->link_keys);
2164 INIT_LIST_HEAD(&hdev->long_term_keys);
2165 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 2166 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2167
2168 INIT_WORK(&hdev->rx_work, hci_rx_work);
2169 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2170 INIT_WORK(&hdev->tx_work, hci_tx_work);
2171 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 2172
b1b813d4
DH		 2173 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2174 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2175 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2176
b1b813d4
DH		 2177 skb_queue_head_init(&hdev->rx_q);
2178 skb_queue_head_init(&hdev->cmd_q);
2179 skb_queue_head_init(&hdev->raw_q);
2180
2181 init_waitqueue_head(&hdev->req_wait_q);
2182
bda4f23a 2183 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2184
b1b813d4
DH		 2185 hci_init_sysfs(hdev);
2186 discovery_init(hdev);
9be0dab7
DH		 2187
2188 return hdev;
2189}
2190EXPORT_SYMBOL(hci_alloc_dev);
2191
2192/* Free HCI device */
2193void hci_free_dev(struct hci_dev *hdev)
2194{
9be0dab7
DH		 2195 /* will free via device release */
2196 put_device(&hdev->dev);
2197}
2198EXPORT_SYMBOL(hci_free_dev);
2199
1da177e4
LT		 2200/* Register HCI device */
2201int hci_register_dev(struct hci_dev *hdev)
2202{
b1b813d4 2203 int id, error;
1da177e4 2204
010666a1 2205 if (!hdev->open || !hdev->close)
1da177e4
LT		 2206 return -EINVAL;
2207
08add513
MM		 2208 /* Do not allow HCI_AMP devices to register at index 0,
2209 * so the index can be used as the AMP controller ID.
2210 */
3df92b31
SL		 2211 switch (hdev->dev_type) {
2212 case HCI_BREDR:
2213 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2214 break;
2215 case HCI_AMP:
2216 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2217 break;
2218 default:
2219 return -EINVAL;
1da177e4 2220 }
8e87d142 2221
3df92b31
SL		 2222 if (id < 0)
2223 return id;
2224
1da177e4
LT		 2225 sprintf(hdev->name, "hci%d", id);
2226 hdev->id = id;
2d8b3a11
AE		 2227
2228 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2229
d8537548
KC		 2230 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2231 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 2232 if (!hdev->workqueue) {
2233 error = -ENOMEM;
2234 goto err;
2235 }
f48fd9c8 2236
d8537548
KC		 2237 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2238 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 2239 if (!hdev->req_workqueue) {
2240 destroy_workqueue(hdev->workqueue);
2241 error = -ENOMEM;
2242 goto err;
2243 }
2244
33ca954d
DH		 2245 error = hci_add_sysfs(hdev);
2246 if (error < 0)
2247 goto err_wqueue;
1da177e4 2248
611b30f7 2249 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2250 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2251 hdev);
611b30f7
MH		 2252 if (hdev->rfkill) {
2253 if (rfkill_register(hdev->rfkill) < 0) {
2254 rfkill_destroy(hdev->rfkill);
2255 hdev->rfkill = NULL;
2256 }
2257 }
2258
a8b2d5c2 2259 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 2260
2261 if (hdev->dev_type != HCI_AMP)
2262 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2263
fcee3377
GP		 2264 write_lock(&hci_dev_list_lock);
2265 list_add(&hdev->list, &hci_dev_list);
2266 write_unlock(&hci_dev_list_lock);
2267
1da177e4 2268 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2269 hci_dev_hold(hdev);
1da177e4 2270
19202573 2271 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2272
1da177e4 2273 return id;
f48fd9c8 2274
33ca954d
DH		 2275err_wqueue:
2276 destroy_workqueue(hdev->workqueue);
6ead1bbc 2277 destroy_workqueue(hdev->req_workqueue);
33ca954d 2278err:
3df92b31 2279 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 2280
33ca954d 2281 return error;
1da177e4
LT		 2282}
2283EXPORT_SYMBOL(hci_register_dev);
2284
2285/* Unregister HCI device */
59735631 2286void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2287{
3df92b31 2288 int i, id;
ef222013 2289
c13854ce 2290 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2291
94324962
JH		 2292 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2293
3df92b31
SL		 2294 id = hdev->id;
2295
f20d09d5 2296 write_lock(&hci_dev_list_lock);
1da177e4 2297 list_del(&hdev->list);
f20d09d5 2298 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2299
2300 hci_dev_do_close(hdev);
2301
cd4c5391 2302 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2303 kfree_skb(hdev->reassembly[i]);
2304
b9b5ef18
GP		 2305 cancel_work_sync(&hdev->power_on);
2306
ab81cbf9 2307 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2308 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2309 hci_dev_lock(hdev);
744cf19e 2310 mgmt_index_removed(hdev);
09fd0de5 2311 hci_dev_unlock(hdev);
56e5cb86 2312 }
ab81cbf9 2313
2e58ef3e
JH		 2314 /* mgmt_index_removed should take care of emptying the
2315 * pending list */
2316 BUG_ON(!list_empty(&hdev->mgmt_pending));
2317
1da177e4
LT		 2318 hci_notify(hdev, HCI_DEV_UNREG);
2319
611b30f7
MH		 2320 if (hdev->rfkill) {
2321 rfkill_unregister(hdev->rfkill);
2322 rfkill_destroy(hdev->rfkill);
2323 }
2324
ce242970 2325 hci_del_sysfs(hdev);
147e2d59 2326
f48fd9c8 2327 destroy_workqueue(hdev->workqueue);
6ead1bbc 2328 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2329
09fd0de5 2330 hci_dev_lock(hdev);
e2e0cacb 2331 hci_blacklist_clear(hdev);
2aeb9a1a 2332 hci_uuids_clear(hdev);
55ed8ca1 2333 hci_link_keys_clear(hdev);
b899efaf 2334 hci_smp_ltks_clear(hdev);
2763eda6 2335 hci_remote_oob_data_clear(hdev);
09fd0de5 2336 hci_dev_unlock(hdev);
e2e0cacb 2337
dc946bd8 2338 hci_dev_put(hdev);
3df92b31
SL		 2339
2340 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2341}
2342EXPORT_SYMBOL(hci_unregister_dev);
2343
2344/* Suspend HCI device */
2345int hci_suspend_dev(struct hci_dev *hdev)
2346{
2347 hci_notify(hdev, HCI_DEV_SUSPEND);
2348 return 0;
2349}
2350EXPORT_SYMBOL(hci_suspend_dev);
2351
2352/* Resume HCI device */
2353int hci_resume_dev(struct hci_dev *hdev)
2354{
2355 hci_notify(hdev, HCI_DEV_RESUME);
2356 return 0;
2357}
2358EXPORT_SYMBOL(hci_resume_dev);
2359
76bca880
MH		 2360/* Receive frame from HCI drivers */
2361int hci_recv_frame(struct sk_buff *skb)
2362{
2363 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2364 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2365 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2366 kfree_skb(skb);
2367 return -ENXIO;
2368 }
2369
d82603c6 2370 /* Incoming skb */
76bca880
MH		 2371 bt_cb(skb)->incoming = 1;
2372
2373 /* Time stamp */
2374 __net_timestamp(skb);
2375
76bca880 2376 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2377 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2378
76bca880
MH		 2379 return 0;
2380}
2381EXPORT_SYMBOL(hci_recv_frame);
2382
33e882a5 2383static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2384 int count, __u8 index)
33e882a5
SS		 2385{
2386 int len = 0;
2387 int hlen = 0;
2388 int remain = count;
2389 struct sk_buff *skb;
2390 struct bt_skb_cb *scb;
2391
2392 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2393 index >= NUM_REASSEMBLY)
33e882a5
SS		 2394 return -EILSEQ;
2395
2396 skb = hdev->reassembly[index];
2397
2398 if (!skb) {
2399 switch (type) {
2400 case HCI_ACLDATA_PKT:
2401 len = HCI_MAX_FRAME_SIZE;
2402 hlen = HCI_ACL_HDR_SIZE;
2403 break;
2404 case HCI_EVENT_PKT:
2405 len = HCI_MAX_EVENT_SIZE;
2406 hlen = HCI_EVENT_HDR_SIZE;
2407 break;
2408 case HCI_SCODATA_PKT:
2409 len = HCI_MAX_SCO_SIZE;
2410 hlen = HCI_SCO_HDR_SIZE;
2411 break;
2412 }
2413
1e429f38 2414 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2415 if (!skb)
2416 return -ENOMEM;
2417
2418 scb = (void *) skb->cb;
2419 scb->expect = hlen;
2420 scb->pkt_type = type;
2421
2422 skb->dev = (void *) hdev;
2423 hdev->reassembly[index] = skb;
2424 }
2425
2426 while (count) {
2427 scb = (void *) skb->cb;
89bb46d0 2428 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2429
2430 memcpy(skb_put(skb, len), data, len);
2431
2432 count -= len;
2433 data += len;
2434 scb->expect -= len;
2435 remain = count;
2436
2437 switch (type) {
2438 case HCI_EVENT_PKT:
2439 if (skb->len == HCI_EVENT_HDR_SIZE) {
2440 struct hci_event_hdr *h = hci_event_hdr(skb);
2441 scb->expect = h->plen;
2442
2443 if (skb_tailroom(skb) < scb->expect) {
2444 kfree_skb(skb);
2445 hdev->reassembly[index] = NULL;
2446 return -ENOMEM;
2447 }
2448 }
2449 break;
2450
2451 case HCI_ACLDATA_PKT:
2452 if (skb->len == HCI_ACL_HDR_SIZE) {
2453 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2454 scb->expect = __le16_to_cpu(h->dlen);
2455
2456 if (skb_tailroom(skb) < scb->expect) {
2457 kfree_skb(skb);
2458 hdev->reassembly[index] = NULL;
2459 return -ENOMEM;
2460 }
2461 }
2462 break;
2463
2464 case HCI_SCODATA_PKT:
2465 if (skb->len == HCI_SCO_HDR_SIZE) {
2466 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2467 scb->expect = h->dlen;
2468
2469 if (skb_tailroom(skb) < scb->expect) {
2470 kfree_skb(skb);
2471 hdev->reassembly[index] = NULL;
2472 return -ENOMEM;
2473 }
2474 }
2475 break;
2476 }
2477
2478 if (scb->expect == 0) {
2479 /* Complete frame */
2480
2481 bt_cb(skb)->pkt_type = type;
2482 hci_recv_frame(skb);
2483
2484 hdev->reassembly[index] = NULL;
2485 return remain;
2486 }
2487 }
2488
2489 return remain;
2490}
2491
ef222013
MH		 2492int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2493{
f39a3c06
SS		 2494 int rem = 0;
2495
ef222013
MH		 2496 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2497 return -EILSEQ;
2498
da5f6c37 2499 while (count) {
1e429f38 2500 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2501 if (rem < 0)
2502 return rem;
ef222013 2503
f39a3c06
SS		 2504 data += (count - rem);
2505 count = rem;
f81c6224 2506 }
ef222013 2507
f39a3c06 2508 return rem;
ef222013
MH		 2509}
2510EXPORT_SYMBOL(hci_recv_fragment);
2511
99811510
SS		 2512#define STREAM_REASSEMBLY 0
2513
2514int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2515{
2516 int type;
2517 int rem = 0;
2518
da5f6c37 2519 while (count) {
99811510
SS		 2520 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2521
2522 if (!skb) {
2523 struct { char type; } *pkt;
2524
2525 /* Start of the frame */
2526 pkt = data;
2527 type = pkt->type;
2528
2529 data++;
2530 count--;
2531 } else
2532 type = bt_cb(skb)->pkt_type;
2533
1e429f38 2534 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2535 STREAM_REASSEMBLY);
99811510
SS		 2536 if (rem < 0)
2537 return rem;
2538
2539 data += (count - rem);
2540 count = rem;
f81c6224 2541 }
99811510
SS		 2542
2543 return rem;
2544}
2545EXPORT_SYMBOL(hci_recv_stream_fragment);
2546
1da177e4
LT		 2547/* ---- Interface to upper protocols ---- */
2548
1da177e4
LT		 2549int hci_register_cb(struct hci_cb *cb)
2550{
2551 BT_DBG("%p name %s", cb, cb->name);
2552
f20d09d5 2553 write_lock(&hci_cb_list_lock);
1da177e4 2554 list_add(&cb->list, &hci_cb_list);
f20d09d5 2555 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2556
2557 return 0;
2558}
2559EXPORT_SYMBOL(hci_register_cb);
2560
2561int hci_unregister_cb(struct hci_cb *cb)
2562{
2563 BT_DBG("%p name %s", cb, cb->name);
2564
f20d09d5 2565 write_lock(&hci_cb_list_lock);
1da177e4 2566 list_del(&cb->list);
f20d09d5 2567 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2568
2569 return 0;
2570}
2571EXPORT_SYMBOL(hci_unregister_cb);
2572
2573static int hci_send_frame(struct sk_buff *skb)
2574{
2575 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2576
2577 if (!hdev) {
2578 kfree_skb(skb);
2579 return -ENODEV;
2580 }
2581
0d48d939 2582 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2583
cd82e61c
MH		 2584 /* Time stamp */
2585 __net_timestamp(skb);
1da177e4 2586
cd82e61c
MH		 2587 /* Send copy to monitor */
2588 hci_send_to_monitor(hdev, skb);
2589
2590 if (atomic_read(&hdev->promisc)) {
2591 /* Send copy to the sockets */
470fe1b5 2592 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2593 }
2594
2595 /* Get rid of skb owner, prior to sending to the driver. */
2596 skb_orphan(skb);
2597
2598 return hdev->send(skb);
2599}
2600
3119ae95
JH		 2601void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2602{
2603 skb_queue_head_init(&req->cmd_q);
2604 req->hdev = hdev;
5d73e034 2605 req->err = 0;
3119ae95
JH		 2606}
2607
2608int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2609{
2610 struct hci_dev *hdev = req->hdev;
2611 struct sk_buff *skb;
2612 unsigned long flags;
2613
2614 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2615
5d73e034
AG		 2616 /* If an error occured during request building, remove all HCI
2617 * commands queued on the HCI request queue.
2618 */
2619 if (req->err) {
2620 skb_queue_purge(&req->cmd_q);
2621 return req->err;
2622 }
2623
3119ae95
JH		 2624 /* Do not allow empty requests */
2625 if (skb_queue_empty(&req->cmd_q))
382b0c39 2626 return -ENODATA;
3119ae95
JH		 2627
2628 skb = skb_peek_tail(&req->cmd_q);
2629 bt_cb(skb)->req.complete = complete;
2630
2631 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2632 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2633 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2634
2635 queue_work(hdev->workqueue, &hdev->cmd_work);
2636
2637 return 0;
2638}
2639
1ca3a9d0 2640static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2641 u32 plen, const void *param)
1da177e4
LT		 2642{
2643 int len = HCI_COMMAND_HDR_SIZE + plen;
2644 struct hci_command_hdr *hdr;
2645 struct sk_buff *skb;
2646
1da177e4 2647 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2648 if (!skb)
2649 return NULL;
1da177e4
LT		 2650
2651 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2652 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2653 hdr->plen = plen;
2654
2655 if (plen)
2656 memcpy(skb_put(skb, plen), param, plen);
2657
2658 BT_DBG("skb len %d", skb->len);
2659
0d48d939 2660 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2661 skb->dev = (void *) hdev;
c78ae283 2662
1ca3a9d0
JH		 2663 return skb;
2664}
2665
2666/* Send HCI command */
07dc93dd
JH		 2667int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2668 const void *param)
1ca3a9d0
JH		 2669{
2670 struct sk_buff *skb;
2671
2672 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2673
2674 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2675 if (!skb) {
2676 BT_ERR("%s no memory for command", hdev->name);
2677 return -ENOMEM;
2678 }
2679
11714b3d
JH		 2680 /* Stand-alone HCI commands must be flaged as
2681 * single-command requests.
2682 */
2683 bt_cb(skb)->req.start = true;
2684
1da177e4 2685 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2686 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2687
2688 return 0;
2689}
1da177e4 2690
71c76a17 2691/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 2692void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2693 const void *param, u8 event)
71c76a17
JH		 2694{
2695 struct hci_dev *hdev = req->hdev;
2696 struct sk_buff *skb;
2697
2698 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2699
34739c1e
AG		 2700 /* If an error occured during request building, there is no point in
2701 * queueing the HCI command. We can simply return.
2702 */
2703 if (req->err)
2704 return;
2705
71c76a17
JH		 2706 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2707 if (!skb) {
5d73e034
AG		 2708 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2709 hdev->name, opcode);
2710 req->err = -ENOMEM;
e348fe6b 2711 return;
71c76a17
JH		 2712 }
2713
2714 if (skb_queue_empty(&req->cmd_q))
2715 bt_cb(skb)->req.start = true;
2716
02350a72
JH		 2717 bt_cb(skb)->req.event = event;
2718
71c76a17 2719 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 2720}
2721
07dc93dd
JH		 2722void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2723 const void *param)
02350a72
JH		 2724{
2725 hci_req_add_ev(req, opcode, plen, param, 0);
2726}
2727
1da177e4 2728/* Get data from the previously sent command */
a9de9248 2729void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2730{
2731 struct hci_command_hdr *hdr;
2732
2733 if (!hdev->sent_cmd)
2734 return NULL;
2735
2736 hdr = (void *) hdev->sent_cmd->data;
2737
a9de9248 2738 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2739 return NULL;
2740
f0e09510 2741 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2742
2743 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2744}
2745
2746/* Send ACL data */
2747static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2748{
2749 struct hci_acl_hdr *hdr;
2750 int len = skb->len;
2751
badff6d0
ACM		 2752 skb_push(skb, HCI_ACL_HDR_SIZE);
2753 skb_reset_transport_header(skb);
9c70220b 2754 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2755 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2756 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2757}
2758
ee22be7e 2759static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2760 struct sk_buff *skb, __u16 flags)
1da177e4 2761{
ee22be7e 2762 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2763 struct hci_dev *hdev = conn->hdev;
2764 struct sk_buff *list;
2765
087bfd99
GP		 2766 skb->len = skb_headlen(skb);
2767 skb->data_len = 0;
2768
2769 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2770
2771 switch (hdev->dev_type) {
2772 case HCI_BREDR:
2773 hci_add_acl_hdr(skb, conn->handle, flags);
2774 break;
2775 case HCI_AMP:
2776 hci_add_acl_hdr(skb, chan->handle, flags);
2777 break;
2778 default:
2779 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2780 return;
2781 }
087bfd99 2782
70f23020
AE		 2783 list = skb_shinfo(skb)->frag_list;
2784 if (!list) {
1da177e4
LT		 2785 /* Non fragmented */
2786 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2787
73d80deb 2788 skb_queue_tail(queue, skb);
1da177e4
LT		 2789 } else {
2790 /* Fragmented */
2791 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2792
2793 skb_shinfo(skb)->frag_list = NULL;
2794
2795 /* Queue all fragments atomically */
af3e6359 2796 spin_lock(&queue->lock);
1da177e4 2797
73d80deb 2798 __skb_queue_tail(queue, skb);
e702112f
AE		 2799
2800 flags &= ~ACL_START;
2801 flags |= ACL_CONT;
1da177e4
LT		 2802 do {
2803 skb = list; list = list->next;
8e87d142 2804
1da177e4 2805 skb->dev = (void *) hdev;
0d48d939 2806 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2807 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2808
2809 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2810
73d80deb 2811 __skb_queue_tail(queue, skb);
1da177e4
LT		 2812 } while (list);
2813
af3e6359 2814 spin_unlock(&queue->lock);
1da177e4 2815 }
73d80deb
LAD		 2816}
2817
2818void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2819{
ee22be7e 2820 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2821
f0e09510 2822 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2823
2824 skb->dev = (void *) hdev;
73d80deb 2825
ee22be7e 2826 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2827
3eff45ea 2828 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2829}
1da177e4
LT		 2830
2831/* Send SCO data */
0d861d8b 2832void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2833{
2834 struct hci_dev *hdev = conn->hdev;
2835 struct hci_sco_hdr hdr;
2836
2837 BT_DBG("%s len %d", hdev->name, skb->len);
2838
aca3192c 2839 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2840 hdr.dlen = skb->len;
2841
badff6d0
ACM		 2842 skb_push(skb, HCI_SCO_HDR_SIZE);
2843 skb_reset_transport_header(skb);
9c70220b 2844 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2845
2846 skb->dev = (void *) hdev;
0d48d939 2847 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2848
1da177e4 2849 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2850 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2851}
1da177e4
LT		 2852
2853/* ---- HCI TX task (outgoing data) ---- */
2854
2855/* HCI Connection scheduler */
6039aa73
GP		 2856static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2857 int *quote)
1da177e4
LT		 2858{
2859 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2860 struct hci_conn *conn = NULL, *c;
abc5de8f 2861 unsigned int num = 0, min = ~0;
1da177e4 2862
8e87d142 2863 /* We don't have to lock device here. Connections are always
1da177e4 2864 * added and removed with TX task disabled. */
bf4c6325
GP		 2865
2866 rcu_read_lock();
2867
2868 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2869 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2870 continue;
769be974
MH		 2871
2872 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2873 continue;
2874
1da177e4
LT		 2875 num++;
2876
2877 if (c->sent < min) {
2878 min = c->sent;
2879 conn = c;
2880 }
52087a79
LAD		 2881
2882 if (hci_conn_num(hdev, type) == num)
2883 break;
1da177e4
LT		 2884 }
2885
bf4c6325
GP		 2886 rcu_read_unlock();
2887
1da177e4 2888 if (conn) {
6ed58ec5
VT		 2889 int cnt, q;
2890
2891 switch (conn->type) {
2892 case ACL_LINK:
2893 cnt = hdev->acl_cnt;
2894 break;
2895 case SCO_LINK:
2896 case ESCO_LINK:
2897 cnt = hdev->sco_cnt;
2898 break;
2899 case LE_LINK:
2900 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2901 break;
2902 default:
2903 cnt = 0;
2904 BT_ERR("Unknown link type");
2905 }
2906
2907 q = cnt / num;
1da177e4
LT		 2908 *quote = q ? q : 1;
2909 } else
2910 *quote = 0;
2911
2912 BT_DBG("conn %p quote %d", conn, *quote);
2913 return conn;
2914}
2915
6039aa73 2916static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2917{
2918 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2919 struct hci_conn *c;
1da177e4 2920
bae1f5d9 2921 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2922
bf4c6325
GP		 2923 rcu_read_lock();
2924
1da177e4 2925 /* Kill stalled connections */
bf4c6325 2926 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2927 if (c->type == type && c->sent) {
6ed93dc6
AE		 2928 BT_ERR("%s killing stalled connection %pMR",
2929 hdev->name, &c->dst);
bed71748 2930 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2931 }
2932 }
bf4c6325
GP		 2933
2934 rcu_read_unlock();
1da177e4
LT		 2935}
2936
6039aa73
GP		 2937static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2938 int *quote)
1da177e4 2939{
73d80deb
LAD		 2940 struct hci_conn_hash *h = &hdev->conn_hash;
2941 struct hci_chan *chan = NULL;
abc5de8f 2942 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2943 struct hci_conn *conn;
73d80deb
LAD		 2944 int cnt, q, conn_num = 0;
2945
2946 BT_DBG("%s", hdev->name);
2947
bf4c6325
GP		 2948 rcu_read_lock();
2949
2950 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2951 struct hci_chan *tmp;
2952
2953 if (conn->type != type)
2954 continue;
2955
2956 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2957 continue;
2958
2959 conn_num++;
2960
8192edef 2961 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2962 struct sk_buff *skb;
2963
2964 if (skb_queue_empty(&tmp->data_q))
2965 continue;
2966
2967 skb = skb_peek(&tmp->data_q);
2968 if (skb->priority < cur_prio)
2969 continue;
2970
2971 if (skb->priority > cur_prio) {
2972 num = 0;
2973 min = ~0;
2974 cur_prio = skb->priority;
2975 }
2976
2977 num++;
2978
2979 if (conn->sent < min) {
2980 min = conn->sent;
2981 chan = tmp;
2982 }
2983 }
2984
2985 if (hci_conn_num(hdev, type) == conn_num)
2986 break;
2987 }
2988
bf4c6325
GP		 2989 rcu_read_unlock();
2990
73d80deb
LAD		 2991 if (!chan)
2992 return NULL;
2993
2994 switch (chan->conn->type) {
2995 case ACL_LINK:
2996 cnt = hdev->acl_cnt;
2997 break;
bd1eb66b
AE		 2998 case AMP_LINK:
2999 cnt = hdev->block_cnt;
3000 break;
73d80deb
LAD		 3001 case SCO_LINK:
3002 case ESCO_LINK:
3003 cnt = hdev->sco_cnt;
3004 break;
3005 case LE_LINK:
3006 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3007 break;
3008 default:
3009 cnt = 0;
3010 BT_ERR("Unknown link type");
3011 }
3012
3013 q = cnt / num;
3014 *quote = q ? q : 1;
3015 BT_DBG("chan %p quote %d", chan, *quote);
3016 return chan;
3017}
3018
02b20f0b
LAD		 3019static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3020{
3021 struct hci_conn_hash *h = &hdev->conn_hash;
3022 struct hci_conn *conn;
3023 int num = 0;
3024
3025 BT_DBG("%s", hdev->name);
3026
bf4c6325
GP		 3027 rcu_read_lock();
3028
3029 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3030 struct hci_chan *chan;
3031
3032 if (conn->type != type)
3033 continue;
3034
3035 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3036 continue;
3037
3038 num++;
3039
8192edef 3040 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3041 struct sk_buff *skb;
3042
3043 if (chan->sent) {
3044 chan->sent = 0;
3045 continue;
3046 }
3047
3048 if (skb_queue_empty(&chan->data_q))
3049 continue;
3050
3051 skb = skb_peek(&chan->data_q);
3052 if (skb->priority >= HCI_PRIO_MAX - 1)
3053 continue;
3054
3055 skb->priority = HCI_PRIO_MAX - 1;
3056
3057 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3058 skb->priority);
02b20f0b
LAD		 3059 }
3060
3061 if (hci_conn_num(hdev, type) == num)
3062 break;
3063 }
bf4c6325
GP		 3064
3065 rcu_read_unlock();
3066
02b20f0b
LAD		 3067}
3068
b71d385a
AE		 3069static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3070{
3071 /* Calculate count of blocks used by this packet */
3072 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3073}
3074
6039aa73 3075static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3076{
1da177e4
LT		 3077 if (!test_bit(HCI_RAW, &hdev->flags)) {
3078 /* ACL tx timeout must be longer than maximum
3079 * link supervision timeout (40.9 seconds) */
63d2bc1b 3080 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3081 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3082 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3083 }
63d2bc1b 3084}
1da177e4 3085
6039aa73 3086static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3087{
3088 unsigned int cnt = hdev->acl_cnt;
3089 struct hci_chan *chan;
3090 struct sk_buff *skb;
3091 int quote;
3092
3093 __check_timeout(hdev, cnt);
04837f64 3094
73d80deb 3095 while (hdev->acl_cnt &&
a8c5fb1a 3096 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3097 u32 priority = (skb_peek(&chan->data_q))->priority;
3098 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3099 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3100 skb->len, skb->priority);
73d80deb 3101
ec1cce24
LAD		 3102 /* Stop if priority has changed */
3103 if (skb->priority < priority)
3104 break;
3105
3106 skb = skb_dequeue(&chan->data_q);
3107
73d80deb 3108 hci_conn_enter_active_mode(chan->conn,
04124681 3109 bt_cb(skb)->force_active);
04837f64 3110
1da177e4
LT		 3111 hci_send_frame(skb);
3112 hdev->acl_last_tx = jiffies;
3113
3114 hdev->acl_cnt--;
73d80deb
LAD		 3115 chan->sent++;
3116 chan->conn->sent++;
1da177e4
LT		 3117 }
3118 }
02b20f0b
LAD		 3119
3120 if (cnt != hdev->acl_cnt)
3121 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3122}
3123
6039aa73 3124static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3125{
63d2bc1b 3126 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3127 struct hci_chan *chan;
3128 struct sk_buff *skb;
3129 int quote;
bd1eb66b 3130 u8 type;
b71d385a 3131
63d2bc1b 3132 __check_timeout(hdev, cnt);
b71d385a 3133
bd1eb66b
AE		 3134 BT_DBG("%s", hdev->name);
3135
3136 if (hdev->dev_type == HCI_AMP)
3137 type = AMP_LINK;
3138 else
3139 type = ACL_LINK;
3140
b71d385a 3141 while (hdev->block_cnt > 0 &&
bd1eb66b 3142 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3143 u32 priority = (skb_peek(&chan->data_q))->priority;
3144 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3145 int blocks;
3146
3147 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3148 skb->len, skb->priority);
b71d385a
AE		 3149
3150 /* Stop if priority has changed */
3151 if (skb->priority < priority)
3152 break;
3153
3154 skb = skb_dequeue(&chan->data_q);
3155
3156 blocks = __get_blocks(hdev, skb);
3157 if (blocks > hdev->block_cnt)
3158 return;
3159
3160 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3161 bt_cb(skb)->force_active);
b71d385a
AE		 3162
3163 hci_send_frame(skb);
3164 hdev->acl_last_tx = jiffies;
3165
3166 hdev->block_cnt -= blocks;
3167 quote -= blocks;
3168
3169 chan->sent += blocks;
3170 chan->conn->sent += blocks;
3171 }
3172 }
3173
3174 if (cnt != hdev->block_cnt)
bd1eb66b 3175 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3176}
3177
6039aa73 3178static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3179{
3180 BT_DBG("%s", hdev->name);
3181
bd1eb66b
AE		 3182 /* No ACL link over BR/EDR controller */
3183 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3184 return;
3185
3186 /* No AMP link over AMP controller */
3187 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3188 return;
3189
3190 switch (hdev->flow_ctl_mode) {
3191 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3192 hci_sched_acl_pkt(hdev);
3193 break;
3194
3195 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3196 hci_sched_acl_blk(hdev);
3197 break;
3198 }
3199}
3200
1da177e4 3201/* Schedule SCO */
6039aa73 3202static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3203{
3204 struct hci_conn *conn;
3205 struct sk_buff *skb;
3206 int quote;
3207
3208 BT_DBG("%s", hdev->name);
3209
52087a79
LAD		 3210 if (!hci_conn_num(hdev, SCO_LINK))
3211 return;
3212
1da177e4
LT		 3213 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3214 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3215 BT_DBG("skb %p len %d", skb, skb->len);
3216 hci_send_frame(skb);
3217
3218 conn->sent++;
3219 if (conn->sent == ~0)
3220 conn->sent = 0;
3221 }
3222 }
3223}
3224
6039aa73 3225static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3226{
3227 struct hci_conn *conn;
3228 struct sk_buff *skb;
3229 int quote;
3230
3231 BT_DBG("%s", hdev->name);
3232
52087a79
LAD		 3233 if (!hci_conn_num(hdev, ESCO_LINK))
3234 return;
3235
8fc9ced3
GP		 3236 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3237 &quote))) {
b6a0dc82
MH		 3238 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3239 BT_DBG("skb %p len %d", skb, skb->len);
3240 hci_send_frame(skb);
3241
3242 conn->sent++;
3243 if (conn->sent == ~0)
3244 conn->sent = 0;
3245 }
3246 }
3247}
3248
6039aa73 3249static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3250{
73d80deb 3251 struct hci_chan *chan;
6ed58ec5 3252 struct sk_buff *skb;
02b20f0b 3253 int quote, cnt, tmp;
6ed58ec5
VT		 3254
3255 BT_DBG("%s", hdev->name);
3256
52087a79
LAD		 3257 if (!hci_conn_num(hdev, LE_LINK))
3258 return;
3259
6ed58ec5
VT		 3260 if (!test_bit(HCI_RAW, &hdev->flags)) {
3261 /* LE tx timeout must be longer than maximum
3262 * link supervision timeout (40.9 seconds) */
bae1f5d9 3263 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3264 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3265 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3266 }
3267
3268 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3269 tmp = cnt;
73d80deb 3270 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3271 u32 priority = (skb_peek(&chan->data_q))->priority;
3272 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3273 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3274 skb->len, skb->priority);
6ed58ec5 3275
ec1cce24
LAD		 3276 /* Stop if priority has changed */
3277 if (skb->priority < priority)
3278 break;
3279
3280 skb = skb_dequeue(&chan->data_q);
3281
6ed58ec5
VT		 3282 hci_send_frame(skb);
3283 hdev->le_last_tx = jiffies;
3284
3285 cnt--;
73d80deb
LAD		 3286 chan->sent++;
3287 chan->conn->sent++;
6ed58ec5
VT		 3288 }
3289 }
73d80deb 3290
6ed58ec5
VT		 3291 if (hdev->le_pkts)
3292 hdev->le_cnt = cnt;
3293 else
3294 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3295
3296 if (cnt != tmp)
3297 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3298}
3299
3eff45ea 3300static void hci_tx_work(struct work_struct *work)
1da177e4 3301{
3eff45ea 3302 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3303 struct sk_buff *skb;
3304
6ed58ec5 3305 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3306 hdev->sco_cnt, hdev->le_cnt);
1da177e4 3307
52de599e
MH		 3308 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
3309 /* Schedule queues and send stuff to HCI driver */
3310 hci_sched_acl(hdev);
3311 hci_sched_sco(hdev);
3312 hci_sched_esco(hdev);
3313 hci_sched_le(hdev);
3314 }
6ed58ec5 3315
1da177e4
LT		 3316 /* Send next queued raw (unknown type) packet */
3317 while ((skb = skb_dequeue(&hdev->raw_q)))
3318 hci_send_frame(skb);
1da177e4
LT		 3319}
3320
25985edc 3321/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3322
3323/* ACL data packet */
6039aa73 3324static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 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
f0e09510 3336 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3337 handle, flags);
1da177e4
LT		 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);
8e87d142 3344
1da177e4 3345 if (conn) {
65983fc7 3346 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3347
1da177e4 3348 /* Send to upper protocol */
686ebf28
UF		 3349 l2cap_recv_acldata(conn, skb, flags);
3350 return;
1da177e4 3351 } else {
8e87d142 3352 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3353 hdev->name, handle);
1da177e4
LT		 3354 }
3355
3356 kfree_skb(skb);
3357}
3358
3359/* SCO data packet */
6039aa73 3360static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 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
f0e09510 3370 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 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) {
1da177e4 3379 /* Send to upper protocol */
686ebf28
UF		 3380 sco_recv_scodata(conn, skb);
3381 return;
1da177e4 3382 } else {
8e87d142 3383 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3384 hdev->name, handle);
1da177e4
LT		 3385 }
3386
3387 kfree_skb(skb);
3388}
3389
9238f36a
JH		 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
42c6b129
JH		 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
9238f36a
JH		 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
42c6b129
JH		 3431 /* If the completed command doesn't match the last one that was
3432 * sent we need to do special handling of it.
9238f36a 3433 */
42c6b129
JH		 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
9238f36a 3444 return;
42c6b129 3445 }
9238f36a
JH		 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;
53e21fbc
JH		 3459
3460 if (req_complete) {
3461 /* We must set the complete callback to NULL to
3462 * avoid calling the callback more than once if
3463 * this function gets called again.
3464 */
3465 bt_cb(hdev->sent_cmd)->req.complete = NULL;
3466
9238f36a 3467 goto call_complete;
53e21fbc 3468 }
9238f36a
JH		 3469 }
3470
3471 /* Remove all pending commands belonging to this request */
3472 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3473 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3474 if (bt_cb(skb)->req.start) {
3475 __skb_queue_head(&hdev->cmd_q, skb);
3476 break;
3477 }
3478
3479 req_complete = bt_cb(skb)->req.complete;
3480 kfree_skb(skb);
3481 }
3482 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3483
3484call_complete:
3485 if (req_complete)
3486 req_complete(hdev, status);
3487}
3488
b78752cc 3489static void hci_rx_work(struct work_struct *work)
1da177e4 3490{
b78752cc 3491 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3492 struct sk_buff *skb;
3493
3494 BT_DBG("%s", hdev->name);
3495
1da177e4 3496 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3497 /* Send copy to monitor */
3498 hci_send_to_monitor(hdev, skb);
3499
1da177e4
LT		 3500 if (atomic_read(&hdev->promisc)) {
3501 /* Send copy to the sockets */
470fe1b5 3502 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3503 }
3504
0736cfa8
MH		 3505 if (test_bit(HCI_RAW, &hdev->flags) ||
3506 test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1da177e4
LT		 3507 kfree_skb(skb);
3508 continue;
3509 }
3510
3511 if (test_bit(HCI_INIT, &hdev->flags)) {
3512 /* Don't process data packets in this states. */
0d48d939 3513 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3514 case HCI_ACLDATA_PKT:
3515 case HCI_SCODATA_PKT:
3516 kfree_skb(skb);
3517 continue;
3ff50b79 3518 }
1da177e4
LT		 3519 }
3520
3521 /* Process frame */
0d48d939 3522 switch (bt_cb(skb)->pkt_type) {
1da177e4 3523 case HCI_EVENT_PKT:
b78752cc 3524 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3525 hci_event_packet(hdev, skb);
3526 break;
3527
3528 case HCI_ACLDATA_PKT:
3529 BT_DBG("%s ACL data packet", hdev->name);
3530 hci_acldata_packet(hdev, skb);
3531 break;
3532
3533 case HCI_SCODATA_PKT:
3534 BT_DBG("%s SCO data packet", hdev->name);
3535 hci_scodata_packet(hdev, skb);
3536 break;
3537
3538 default:
3539 kfree_skb(skb);
3540 break;
3541 }
3542 }
1da177e4
LT		 3543}
3544
c347b765 3545static void hci_cmd_work(struct work_struct *work)
1da177e4 3546{
c347b765 3547 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3548 struct sk_buff *skb;
3549
2104786b
AE		 3550 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3551 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3552
1da177e4 3553 /* Send queued commands */
5a08ecce
AE		 3554 if (atomic_read(&hdev->cmd_cnt)) {
3555 skb = skb_dequeue(&hdev->cmd_q);
3556 if (!skb)
3557 return;
3558
7585b97a 3559 kfree_skb(hdev->sent_cmd);
1da177e4 3560
a675d7f1 3561 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 3562 if (hdev->sent_cmd) {
1da177e4
LT		 3563 atomic_dec(&hdev->cmd_cnt);
3564 hci_send_frame(skb);
7bdb8a5c
SJ		 3565 if (test_bit(HCI_RESET, &hdev->flags))
3566 del_timer(&hdev->cmd_timer);
3567 else
3568 mod_timer(&hdev->cmd_timer,
5f246e89 3569 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3570 } else {
3571 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3572 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3573 }
3574 }
3575}
2519a1fc 3576
31f7956c
AG		 3577u8 bdaddr_to_le(u8 bdaddr_type)
3578{
3579 switch (bdaddr_type) {
3580 case BDADDR_LE_PUBLIC:
3581 return ADDR_LE_DEV_PUBLIC;
3582
3583 default:
3584 /* Fallback to LE Random address type */
3585 return ADDR_LE_DEV_RANDOM;
3586 }
3587}
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