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Bluetooth: Read current IAC LAP on controller setup
[deliverable/linux.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
1da177e4 30
8c520a59 31#include <linux/rfkill.h>
1da177e4
LT		 32
33#include <net/bluetooth/bluetooth.h>
34#include <net/bluetooth/hci_core.h>
35
b78752cc 36static void hci_rx_work(struct work_struct *work);
c347b765 37static void hci_cmd_work(struct work_struct *work);
3eff45ea 38static void hci_tx_work(struct work_struct *work);
1da177e4 39
1da177e4
LT		 40/* HCI device list */
41LIST_HEAD(hci_dev_list);
42DEFINE_RWLOCK(hci_dev_list_lock);
43
44/* HCI callback list */
45LIST_HEAD(hci_cb_list);
46DEFINE_RWLOCK(hci_cb_list_lock);
47
3df92b31
SL		 48/* HCI ID Numbering */
49static DEFINE_IDA(hci_index_ida);
50
1da177e4
LT		 51/* ---- HCI notifications ---- */
52
6516455d 53static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 54{
040030ef 55 hci_sock_dev_event(hdev, event);
1da177e4
LT		 56}
57
58/* ---- HCI requests ---- */
59
42c6b129 60static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1da177e4 61{
42c6b129 62 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT		 63
64 if (hdev->req_status == HCI_REQ_PEND) {
65 hdev->req_result = result;
66 hdev->req_status = HCI_REQ_DONE;
67 wake_up_interruptible(&hdev->req_wait_q);
68 }
69}
70
71static void hci_req_cancel(struct hci_dev *hdev, int err)
72{
73 BT_DBG("%s err 0x%2.2x", hdev->name, err);
74
75 if (hdev->req_status == HCI_REQ_PEND) {
76 hdev->req_result = err;
77 hdev->req_status = HCI_REQ_CANCELED;
78 wake_up_interruptible(&hdev->req_wait_q);
79 }
80}
81
77a63e0a
FW		 82static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
83 u8 event)
75e84b7c
JH		 84{
85 struct hci_ev_cmd_complete *ev;
86 struct hci_event_hdr *hdr;
87 struct sk_buff *skb;
88
89 hci_dev_lock(hdev);
90
91 skb = hdev->recv_evt;
92 hdev->recv_evt = NULL;
93
94 hci_dev_unlock(hdev);
95
96 if (!skb)
97 return ERR_PTR(-ENODATA);
98
99 if (skb->len < sizeof(*hdr)) {
100 BT_ERR("Too short HCI event");
101 goto failed;
102 }
103
104 hdr = (void *) skb->data;
105 skb_pull(skb, HCI_EVENT_HDR_SIZE);
106
7b1abbbe
JH		 107 if (event) {
108 if (hdr->evt != event)
109 goto failed;
110 return skb;
111 }
112
75e84b7c
JH		 113 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
114 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
115 goto failed;
116 }
117
118 if (skb->len < sizeof(*ev)) {
119 BT_ERR("Too short cmd_complete event");
120 goto failed;
121 }
122
123 ev = (void *) skb->data;
124 skb_pull(skb, sizeof(*ev));
125
126 if (opcode == __le16_to_cpu(ev->opcode))
127 return skb;
128
129 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
130 __le16_to_cpu(ev->opcode));
131
132failed:
133 kfree_skb(skb);
134 return ERR_PTR(-ENODATA);
135}
136
7b1abbbe 137struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 138 const void *param, u8 event, u32 timeout)
75e84b7c
JH		 139{
140 DECLARE_WAITQUEUE(wait, current);
141 struct hci_request req;
142 int err = 0;
143
144 BT_DBG("%s", hdev->name);
145
146 hci_req_init(&req, hdev);
147
7b1abbbe 148 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH		 149
150 hdev->req_status = HCI_REQ_PEND;
151
152 err = hci_req_run(&req, hci_req_sync_complete);
153 if (err < 0)
154 return ERR_PTR(err);
155
156 add_wait_queue(&hdev->req_wait_q, &wait);
157 set_current_state(TASK_INTERRUPTIBLE);
158
159 schedule_timeout(timeout);
160
161 remove_wait_queue(&hdev->req_wait_q, &wait);
162
163 if (signal_pending(current))
164 return ERR_PTR(-EINTR);
165
166 switch (hdev->req_status) {
167 case HCI_REQ_DONE:
168 err = -bt_to_errno(hdev->req_result);
169 break;
170
171 case HCI_REQ_CANCELED:
172 err = -hdev->req_result;
173 break;
174
175 default:
176 err = -ETIMEDOUT;
177 break;
178 }
179
180 hdev->req_status = hdev->req_result = 0;
181
182 BT_DBG("%s end: err %d", hdev->name, err);
183
184 if (err < 0)
185 return ERR_PTR(err);
186
7b1abbbe
JH		 187 return hci_get_cmd_complete(hdev, opcode, event);
188}
189EXPORT_SYMBOL(__hci_cmd_sync_ev);
190
191struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 192 const void *param, u32 timeout)
7b1abbbe
JH		 193{
194 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH		 195}
196EXPORT_SYMBOL(__hci_cmd_sync);
197
1da177e4 198/* Execute request and wait for completion. */
01178cd4 199static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 200 void (*func)(struct hci_request *req,
201 unsigned long opt),
01178cd4 202 unsigned long opt, __u32 timeout)
1da177e4 203{
42c6b129 204 struct hci_request req;
1da177e4
LT		 205 DECLARE_WAITQUEUE(wait, current);
206 int err = 0;
207
208 BT_DBG("%s start", hdev->name);
209
42c6b129
JH		 210 hci_req_init(&req, hdev);
211
1da177e4
LT		 212 hdev->req_status = HCI_REQ_PEND;
213
42c6b129 214 func(&req, opt);
53cce22d 215
42c6b129
JH		 216 err = hci_req_run(&req, hci_req_sync_complete);
217 if (err < 0) {
53cce22d 218 hdev->req_status = 0;
920c8300
AG		 219
220 /* ENODATA means the HCI request command queue is empty.
221 * This can happen when a request with conditionals doesn't
222 * trigger any commands to be sent. This is normal behavior
223 * and should not trigger an error return.
42c6b129 224 */
920c8300
AG		 225 if (err == -ENODATA)
226 return 0;
227
228 return err;
53cce22d
JH		 229 }
230
bc4445c7
AG		 231 add_wait_queue(&hdev->req_wait_q, &wait);
232 set_current_state(TASK_INTERRUPTIBLE);
233
1da177e4
LT		 234 schedule_timeout(timeout);
235
236 remove_wait_queue(&hdev->req_wait_q, &wait);
237
238 if (signal_pending(current))
239 return -EINTR;
240
241 switch (hdev->req_status) {
242 case HCI_REQ_DONE:
e175072f 243 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 244 break;
245
246 case HCI_REQ_CANCELED:
247 err = -hdev->req_result;
248 break;
249
250 default:
251 err = -ETIMEDOUT;
252 break;
3ff50b79 253 }
1da177e4 254
a5040efa 255 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 256
257 BT_DBG("%s end: err %d", hdev->name, err);
258
259 return err;
260}
261
01178cd4 262static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 263 void (*req)(struct hci_request *req,
264 unsigned long opt),
01178cd4 265 unsigned long opt, __u32 timeout)
1da177e4
LT		 266{
267 int ret;
268
7c6a329e
MH		 269 if (!test_bit(HCI_UP, &hdev->flags))
270 return -ENETDOWN;
271
1da177e4
LT		 272 /* Serialize all requests */
273 hci_req_lock(hdev);
01178cd4 274 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 275 hci_req_unlock(hdev);
276
277 return ret;
278}
279
42c6b129 280static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 281{
42c6b129 282 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 283
284 /* Reset device */
42c6b129
JH		 285 set_bit(HCI_RESET, &req->hdev->flags);
286 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 287}
288
42c6b129 289static void bredr_init(struct hci_request *req)
1da177e4 290{
42c6b129 291 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 292
1da177e4 293 /* Read Local Supported Features */
42c6b129 294 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 295
1143e5a6 296 /* Read Local Version */
42c6b129 297 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 298
299 /* Read BD Address */
42c6b129 300 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 301}
302
42c6b129 303static void amp_init(struct hci_request *req)
e61ef499 304{
42c6b129 305 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 306
e61ef499 307 /* Read Local Version */
42c6b129 308 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489 309
f6996cfe
MH		 310 /* Read Local Supported Commands */
311 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
312
313 /* Read Local Supported Features */
314 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
315
6bcbc489 316 /* Read Local AMP Info */
42c6b129 317 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 318
319 /* Read Data Blk size */
42c6b129 320 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
7528ca1c 321
f38ba941
MH		 322 /* Read Flow Control Mode */
323 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
324
7528ca1c
MH		 325 /* Read Location Data */
326 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
e61ef499
AE		 327}
328
42c6b129 329static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 330{
42c6b129 331 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 332
333 BT_DBG("%s %ld", hdev->name, opt);
334
11778716
AE		 335 /* Reset */
336 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 337 hci_reset_req(req, 0);
11778716 338
e61ef499
AE		 339 switch (hdev->dev_type) {
340 case HCI_BREDR:
42c6b129 341 bredr_init(req);
e61ef499
AE		 342 break;
343
344 case HCI_AMP:
42c6b129 345 amp_init(req);
e61ef499
AE		 346 break;
347
348 default:
349 BT_ERR("Unknown device type %d", hdev->dev_type);
350 break;
351 }
e61ef499
AE		 352}
353
42c6b129 354static void bredr_setup(struct hci_request *req)
2177bab5 355{
4ca048e3
MH		 356 struct hci_dev *hdev = req->hdev;
357
2177bab5
JH		 358 __le16 param;
359 __u8 flt_type;
360
361 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 362 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 363
364 /* Read Class of Device */
42c6b129 365 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 366
367 /* Read Local Name */
42c6b129 368 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 369
370 /* Read Voice Setting */
42c6b129 371 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5 372
b4cb9fb2
MH		 373 /* Read Number of Supported IAC */
374 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
375
4b836f39
MH		 376 /* Read Current IAC LAP */
377 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
378
2177bab5
JH		 379 /* Clear Event Filters */
380 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 381 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 382
383 /* Connection accept timeout ~20 secs */
384 param = __constant_cpu_to_le16(0x7d00);
42c6b129 385 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 386
4ca048e3
MH		 387 /* AVM Berlin (31), aka "BlueFRITZ!", reports version 1.2,
388 * but it does not support page scan related HCI commands.
389 */
390 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1) {
f332ec66
JH		 391 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
392 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
393 }
2177bab5
JH		 394}
395
42c6b129 396static void le_setup(struct hci_request *req)
2177bab5 397{
c73eee91
JH		 398 struct hci_dev *hdev = req->hdev;
399
2177bab5 400 /* Read LE Buffer Size */
42c6b129 401 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 402
403 /* Read LE Local Supported Features */
42c6b129 404 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5
JH		 405
406 /* Read LE Advertising Channel TX Power */
42c6b129 407 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH		 408
409 /* Read LE White List Size */
42c6b129 410 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5
JH		 411
412 /* Read LE Supported States */
42c6b129 413 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
c73eee91
JH		 414
415 /* LE-only controllers have LE implicitly enabled */
416 if (!lmp_bredr_capable(hdev))
417 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 418}
419
420static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
421{
422 if (lmp_ext_inq_capable(hdev))
423 return 0x02;
424
425 if (lmp_inq_rssi_capable(hdev))
426 return 0x01;
427
428 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
429 hdev->lmp_subver == 0x0757)
430 return 0x01;
431
432 if (hdev->manufacturer == 15) {
433 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
434 return 0x01;
435 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
436 return 0x01;
437 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
438 return 0x01;
439 }
440
441 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
442 hdev->lmp_subver == 0x1805)
443 return 0x01;
444
445 return 0x00;
446}
447
42c6b129 448static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 449{
450 u8 mode;
451
42c6b129 452 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 453
42c6b129 454 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 455}
456
42c6b129 457static void hci_setup_event_mask(struct hci_request *req)
2177bab5 458{
42c6b129
JH		 459 struct hci_dev *hdev = req->hdev;
460
2177bab5
JH		 461 /* The second byte is 0xff instead of 0x9f (two reserved bits
462 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
463 * command otherwise.
464 */
465 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
466
467 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
468 * any event mask for pre 1.2 devices.
469 */
470 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
471 return;
472
473 if (lmp_bredr_capable(hdev)) {
474 events[4] |= 0x01; /* Flow Specification Complete */
475 events[4] |= 0x02; /* Inquiry Result with RSSI */
476 events[4] |= 0x04; /* Read Remote Extended Features Complete */
477 events[5] |= 0x08; /* Synchronous Connection Complete */
478 events[5] |= 0x10; /* Synchronous Connection Changed */
c7882cbd
MH		 479 } else {
480 /* Use a different default for LE-only devices */
481 memset(events, 0, sizeof(events));
482 events[0] |= 0x10; /* Disconnection Complete */
483 events[0] |= 0x80; /* Encryption Change */
484 events[1] |= 0x08; /* Read Remote Version Information Complete */
485 events[1] |= 0x20; /* Command Complete */
486 events[1] |= 0x40; /* Command Status */
487 events[1] |= 0x80; /* Hardware Error */
488 events[2] |= 0x04; /* Number of Completed Packets */
489 events[3] |= 0x02; /* Data Buffer Overflow */
490 events[5] |= 0x80; /* Encryption Key Refresh Complete */
2177bab5
JH		 491 }
492
493 if (lmp_inq_rssi_capable(hdev))
494 events[4] |= 0x02; /* Inquiry Result with RSSI */
495
496 if (lmp_sniffsubr_capable(hdev))
497 events[5] |= 0x20; /* Sniff Subrating */
498
499 if (lmp_pause_enc_capable(hdev))
500 events[5] |= 0x80; /* Encryption Key Refresh Complete */
501
502 if (lmp_ext_inq_capable(hdev))
503 events[5] |= 0x40; /* Extended Inquiry Result */
504
505 if (lmp_no_flush_capable(hdev))
506 events[7] |= 0x01; /* Enhanced Flush Complete */
507
508 if (lmp_lsto_capable(hdev))
509 events[6] |= 0x80; /* Link Supervision Timeout Changed */
510
511 if (lmp_ssp_capable(hdev)) {
512 events[6] |= 0x01; /* IO Capability Request */
513 events[6] |= 0x02; /* IO Capability Response */
514 events[6] |= 0x04; /* User Confirmation Request */
515 events[6] |= 0x08; /* User Passkey Request */
516 events[6] |= 0x10; /* Remote OOB Data Request */
517 events[6] |= 0x20; /* Simple Pairing Complete */
518 events[7] |= 0x04; /* User Passkey Notification */
519 events[7] |= 0x08; /* Keypress Notification */
520 events[7] |= 0x10; /* Remote Host Supported
521 * Features Notification
522 */
523 }
524
525 if (lmp_le_capable(hdev))
526 events[7] |= 0x20; /* LE Meta-Event */
527
42c6b129 528 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 529
530 if (lmp_le_capable(hdev)) {
531 memset(events, 0, sizeof(events));
532 events[0] = 0x1f;
42c6b129
JH		 533 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
534 sizeof(events), events);
2177bab5
JH		 535 }
536}
537
42c6b129 538static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 539{
42c6b129
JH		 540 struct hci_dev *hdev = req->hdev;
541
2177bab5 542 if (lmp_bredr_capable(hdev))
42c6b129 543 bredr_setup(req);
56f87901
JH		 544 else
545 clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2177bab5
JH		 546
547 if (lmp_le_capable(hdev))
42c6b129 548 le_setup(req);
2177bab5 549
42c6b129 550 hci_setup_event_mask(req);
2177bab5 551
3f8e2d75
JH		 552 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
553 * local supported commands HCI command.
554 */
555 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 556 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 557
558 if (lmp_ssp_capable(hdev)) {
559 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
560 u8 mode = 0x01;
42c6b129
JH		 561 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
562 sizeof(mode), &mode);
2177bab5
JH		 563 } else {
564 struct hci_cp_write_eir cp;
565
566 memset(hdev->eir, 0, sizeof(hdev->eir));
567 memset(&cp, 0, sizeof(cp));
568
42c6b129 569 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 570 }
571 }
572
573 if (lmp_inq_rssi_capable(hdev))
42c6b129 574 hci_setup_inquiry_mode(req);
2177bab5
JH		 575
576 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 577 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 578
579 if (lmp_ext_feat_capable(hdev)) {
580 struct hci_cp_read_local_ext_features cp;
581
582 cp.page = 0x01;
42c6b129
JH		 583 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
584 sizeof(cp), &cp);
2177bab5
JH		 585 }
586
587 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
588 u8 enable = 1;
42c6b129
JH		 589 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
590 &enable);
2177bab5
JH		 591 }
592}
593
42c6b129 594static void hci_setup_link_policy(struct hci_request *req)
2177bab5 595{
42c6b129 596 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 597 struct hci_cp_write_def_link_policy cp;
598 u16 link_policy = 0;
599
600 if (lmp_rswitch_capable(hdev))
601 link_policy |= HCI_LP_RSWITCH;
602 if (lmp_hold_capable(hdev))
603 link_policy |= HCI_LP_HOLD;
604 if (lmp_sniff_capable(hdev))
605 link_policy |= HCI_LP_SNIFF;
606 if (lmp_park_capable(hdev))
607 link_policy |= HCI_LP_PARK;
608
609 cp.policy = cpu_to_le16(link_policy);
42c6b129 610 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 611}
612
42c6b129 613static void hci_set_le_support(struct hci_request *req)
2177bab5 614{
42c6b129 615 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 616 struct hci_cp_write_le_host_supported cp;
617
c73eee91
JH		 618 /* LE-only devices do not support explicit enablement */
619 if (!lmp_bredr_capable(hdev))
620 return;
621
2177bab5
JH		 622 memset(&cp, 0, sizeof(cp));
623
624 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
625 cp.le = 0x01;
626 cp.simul = lmp_le_br_capable(hdev);
627 }
628
629 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 630 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
631 &cp);
2177bab5
JH		 632}
633
d62e6d67
JH		 634static void hci_set_event_mask_page_2(struct hci_request *req)
635{
636 struct hci_dev *hdev = req->hdev;
637 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
638
639 /* If Connectionless Slave Broadcast master role is supported
640 * enable all necessary events for it.
641 */
642 if (hdev->features[2][0] & 0x01) {
643 events[1] |= 0x40; /* Triggered Clock Capture */
644 events[1] |= 0x80; /* Synchronization Train Complete */
645 events[2] |= 0x10; /* Slave Page Response Timeout */
646 events[2] |= 0x20; /* CSB Channel Map Change */
647 }
648
649 /* If Connectionless Slave Broadcast slave role is supported
650 * enable all necessary events for it.
651 */
652 if (hdev->features[2][0] & 0x02) {
653 events[2] |= 0x01; /* Synchronization Train Received */
654 events[2] |= 0x02; /* CSB Receive */
655 events[2] |= 0x04; /* CSB Timeout */
656 events[2] |= 0x08; /* Truncated Page Complete */
657 }
658
659 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
660}
661
42c6b129 662static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 663{
42c6b129 664 struct hci_dev *hdev = req->hdev;
d2c5d77f 665 u8 p;
42c6b129 666
b8f4e068
GP		 667 /* Some Broadcom based Bluetooth controllers do not support the
668 * Delete Stored Link Key command. They are clearly indicating its
669 * absence in the bit mask of supported commands.
670 *
671 * Check the supported commands and only if the the command is marked
672 * as supported send it. If not supported assume that the controller
673 * does not have actual support for stored link keys which makes this
674 * command redundant anyway.
637b4cae 675 */
59f45d57
JH		 676 if (hdev->commands[6] & 0x80) {
677 struct hci_cp_delete_stored_link_key cp;
678
679 bacpy(&cp.bdaddr, BDADDR_ANY);
680 cp.delete_all = 0x01;
681 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
682 sizeof(cp), &cp);
683 }
684
2177bab5 685 if (hdev->commands[5] & 0x10)
42c6b129 686 hci_setup_link_policy(req);
2177bab5 687
04b4edcb 688 if (lmp_le_capable(hdev)) {
42c6b129 689 hci_set_le_support(req);
04b4edcb
JH		 690 hci_update_ad(req);
691 }
d2c5d77f
JH		 692
693 /* Read features beyond page 1 if available */
694 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
695 struct hci_cp_read_local_ext_features cp;
696
697 cp.page = p;
698 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
699 sizeof(cp), &cp);
700 }
2177bab5
JH		 701}
702
5d4e7e8d
JH		 703static void hci_init4_req(struct hci_request *req, unsigned long opt)
704{
705 struct hci_dev *hdev = req->hdev;
706
d62e6d67
JH		 707 /* Set event mask page 2 if the HCI command for it is supported */
708 if (hdev->commands[22] & 0x04)
709 hci_set_event_mask_page_2(req);
710
5d4e7e8d
JH		 711 /* Check for Synchronization Train support */
712 if (hdev->features[2][0] & 0x04)
713 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
714}
715
2177bab5
JH		 716static int __hci_init(struct hci_dev *hdev)
717{
718 int err;
719
720 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
721 if (err < 0)
722 return err;
723
724 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
725 * BR/EDR/LE type controllers. AMP controllers only need the
726 * first stage init.
727 */
728 if (hdev->dev_type != HCI_BREDR)
729 return 0;
730
731 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
732 if (err < 0)
733 return err;
734
5d4e7e8d
JH		 735 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
736 if (err < 0)
737 return err;
738
739 return __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
2177bab5
JH		 740}
741
42c6b129 742static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 743{
744 __u8 scan = opt;
745
42c6b129 746 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 747
748 /* Inquiry and Page scans */
42c6b129 749 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 750}
751
42c6b129 752static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 753{
754 __u8 auth = opt;
755
42c6b129 756 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 757
758 /* Authentication */
42c6b129 759 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 760}
761
42c6b129 762static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 763{
764 __u8 encrypt = opt;
765
42c6b129 766 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 767
e4e8e37c 768 /* Encryption */
42c6b129 769 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 770}
771
42c6b129 772static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 773{
774 __le16 policy = cpu_to_le16(opt);
775
42c6b129 776 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 777
778 /* Default link policy */
42c6b129 779 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 780}
781
8e87d142 782/* Get HCI device by index.
1da177e4
LT		 783 * Device is held on return. */
784struct hci_dev *hci_dev_get(int index)
785{
8035ded4 786 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 787
788 BT_DBG("%d", index);
789
790 if (index < 0)
791 return NULL;
792
793 read_lock(&hci_dev_list_lock);
8035ded4 794 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 795 if (d->id == index) {
796 hdev = hci_dev_hold(d);
797 break;
798 }
799 }
800 read_unlock(&hci_dev_list_lock);
801 return hdev;
802}
1da177e4
LT		 803
804/* ---- Inquiry support ---- */
ff9ef578 805
30dc78e1
JH		 806bool hci_discovery_active(struct hci_dev *hdev)
807{
808 struct discovery_state *discov = &hdev->discovery;
809
6fbe195d 810 switch (discov->state) {
343f935b 811 case DISCOVERY_FINDING:
6fbe195d 812 case DISCOVERY_RESOLVING:
30dc78e1
JH		 813 return true;
814
6fbe195d
AG		 815 default:
816 return false;
817 }
30dc78e1
JH		 818}
819
ff9ef578
JH		 820void hci_discovery_set_state(struct hci_dev *hdev, int state)
821{
822 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
823
824 if (hdev->discovery.state == state)
825 return;
826
827 switch (state) {
828 case DISCOVERY_STOPPED:
7b99b659
AG		 829 if (hdev->discovery.state != DISCOVERY_STARTING)
830 mgmt_discovering(hdev, 0);
ff9ef578
JH		 831 break;
832 case DISCOVERY_STARTING:
833 break;
343f935b 834 case DISCOVERY_FINDING:
ff9ef578
JH		 835 mgmt_discovering(hdev, 1);
836 break;
30dc78e1
JH		 837 case DISCOVERY_RESOLVING:
838 break;
ff9ef578
JH		 839 case DISCOVERY_STOPPING:
840 break;
841 }
842
843 hdev->discovery.state = state;
844}
845
1f9b9a5d 846void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 847{
30883512 848 struct discovery_state *cache = &hdev->discovery;
b57c1a56 849 struct inquiry_entry *p, *n;
1da177e4 850
561aafbc
JH		 851 list_for_each_entry_safe(p, n, &cache->all, all) {
852 list_del(&p->all);
b57c1a56 853 kfree(p);
1da177e4 854 }
561aafbc
JH		 855
856 INIT_LIST_HEAD(&cache->unknown);
857 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 858}
859
a8c5fb1a
GP		 860struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
861 bdaddr_t *bdaddr)
1da177e4 862{
30883512 863 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 864 struct inquiry_entry *e;
865
6ed93dc6 866 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 867
561aafbc
JH		 868 list_for_each_entry(e, &cache->all, all) {
869 if (!bacmp(&e->data.bdaddr, bdaddr))
870 return e;
871 }
872
873 return NULL;
874}
875
876struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 877 bdaddr_t *bdaddr)
561aafbc 878{
30883512 879 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 880 struct inquiry_entry *e;
881
6ed93dc6 882 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 883
884 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 885 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 886 return e;
887 }
888
889 return NULL;
1da177e4
LT		 890}
891
30dc78e1 892struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 893 bdaddr_t *bdaddr,
894 int state)
30dc78e1
JH		 895{
896 struct discovery_state *cache = &hdev->discovery;
897 struct inquiry_entry *e;
898
6ed93dc6 899 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 900
901 list_for_each_entry(e, &cache->resolve, list) {
902 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
903 return e;
904 if (!bacmp(&e->data.bdaddr, bdaddr))
905 return e;
906 }
907
908 return NULL;
909}
910
a3d4e20a 911void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 912 struct inquiry_entry *ie)
a3d4e20a
JH		 913{
914 struct discovery_state *cache = &hdev->discovery;
915 struct list_head *pos = &cache->resolve;
916 struct inquiry_entry *p;
917
918 list_del(&ie->list);
919
920 list_for_each_entry(p, &cache->resolve, list) {
921 if (p->name_state != NAME_PENDING &&
a8c5fb1a 922 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 923 break;
924 pos = &p->list;
925 }
926
927 list_add(&ie->list, pos);
928}
929
3175405b 930bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 931 bool name_known, bool *ssp)
1da177e4 932{
30883512 933 struct discovery_state *cache = &hdev->discovery;
70f23020 934 struct inquiry_entry *ie;
1da177e4 935
6ed93dc6 936 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 937
2b2fec4d
SJ		 938 hci_remove_remote_oob_data(hdev, &data->bdaddr);
939
388fc8fa
JH		 940 if (ssp)
941 *ssp = data->ssp_mode;
942
70f23020 943 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 944 if (ie) {
388fc8fa
JH		 945 if (ie->data.ssp_mode && ssp)
946 *ssp = true;
947
a3d4e20a 948 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 949 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 950 ie->data.rssi = data->rssi;
951 hci_inquiry_cache_update_resolve(hdev, ie);
952 }
953
561aafbc 954 goto update;
a3d4e20a 955 }
561aafbc
JH		 956
957 /* Entry not in the cache. Add new one. */
958 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
959 if (!ie)
3175405b 960 return false;
561aafbc
JH		 961
962 list_add(&ie->all, &cache->all);
963
964 if (name_known) {
965 ie->name_state = NAME_KNOWN;
966 } else {
967 ie->name_state = NAME_NOT_KNOWN;
968 list_add(&ie->list, &cache->unknown);
969 }
70f23020 970
561aafbc
JH		 971update:
972 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 973 ie->name_state != NAME_PENDING) {
561aafbc
JH		 974 ie->name_state = NAME_KNOWN;
975 list_del(&ie->list);
1da177e4
LT		 976 }
977
70f23020
AE		 978 memcpy(&ie->data, data, sizeof(*data));
979 ie->timestamp = jiffies;
1da177e4 980 cache->timestamp = jiffies;
3175405b
JH		 981
982 if (ie->name_state == NAME_NOT_KNOWN)
983 return false;
984
985 return true;
1da177e4
LT		 986}
987
988static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
989{
30883512 990 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 991 struct inquiry_info *info = (struct inquiry_info *) buf;
992 struct inquiry_entry *e;
993 int copied = 0;
994
561aafbc 995 list_for_each_entry(e, &cache->all, all) {
1da177e4 996 struct inquiry_data *data = &e->data;
b57c1a56
JH		 997
998 if (copied >= num)
999 break;
1000
1da177e4
LT		 1001 bacpy(&info->bdaddr, &data->bdaddr);
1002 info->pscan_rep_mode = data->pscan_rep_mode;
1003 info->pscan_period_mode = data->pscan_period_mode;
1004 info->pscan_mode = data->pscan_mode;
1005 memcpy(info->dev_class, data->dev_class, 3);
1006 info->clock_offset = data->clock_offset;
b57c1a56 1007
1da177e4 1008 info++;
b57c1a56 1009 copied++;
1da177e4
LT		 1010 }
1011
1012 BT_DBG("cache %p, copied %d", cache, copied);
1013 return copied;
1014}
1015
42c6b129 1016static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1017{
1018 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 1019 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 1020 struct hci_cp_inquiry cp;
1021
1022 BT_DBG("%s", hdev->name);
1023
1024 if (test_bit(HCI_INQUIRY, &hdev->flags))
1025 return;
1026
1027 /* Start Inquiry */
1028 memcpy(&cp.lap, &ir->lap, 3);
1029 cp.length = ir->length;
1030 cp.num_rsp = ir->num_rsp;
42c6b129 1031 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 1032}
1033
3e13fa1e
AG		 1034static int wait_inquiry(void *word)
1035{
1036 schedule();
1037 return signal_pending(current);
1038}
1039
1da177e4
LT		 1040int hci_inquiry(void __user *arg)
1041{
1042 __u8 __user *ptr = arg;
1043 struct hci_inquiry_req ir;
1044 struct hci_dev *hdev;
1045 int err = 0, do_inquiry = 0, max_rsp;
1046 long timeo;
1047 __u8 *buf;
1048
1049 if (copy_from_user(&ir, ptr, sizeof(ir)))
1050 return -EFAULT;
1051
5a08ecce
AE		 1052 hdev = hci_dev_get(ir.dev_id);
1053 if (!hdev)
1da177e4
LT		 1054 return -ENODEV;
1055
0736cfa8
MH		 1056 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1057 err = -EBUSY;
1058 goto done;
1059 }
1060
5b69bef5
MH		 1061 if (hdev->dev_type != HCI_BREDR) {
1062 err = -EOPNOTSUPP;
1063 goto done;
1064 }
1065
56f87901
JH		 1066 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1067 err = -EOPNOTSUPP;
1068 goto done;
1069 }
1070
09fd0de5 1071 hci_dev_lock(hdev);
8e87d142 1072 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 1073 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 1074 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 1075 do_inquiry = 1;
1076 }
09fd0de5 1077 hci_dev_unlock(hdev);
1da177e4 1078
04837f64 1079 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 1080
1081 if (do_inquiry) {
01178cd4
JH		 1082 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1083 timeo);
70f23020
AE		 1084 if (err < 0)
1085 goto done;
3e13fa1e
AG		 1086
1087 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1088 * cleared). If it is interrupted by a signal, return -EINTR.
1089 */
1090 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
1091 TASK_INTERRUPTIBLE))
1092 return -EINTR;
70f23020 1093 }
1da177e4 1094
8fc9ced3
GP		 1095 /* for unlimited number of responses we will use buffer with
1096 * 255 entries
1097 */
1da177e4
LT		 1098 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1099
1100 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1101 * copy it to the user space.
1102 */
01df8c31 1103 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1104 if (!buf) {
1da177e4
LT		 1105 err = -ENOMEM;
1106 goto done;
1107 }
1108
09fd0de5 1109 hci_dev_lock(hdev);
1da177e4 1110 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1111 hci_dev_unlock(hdev);
1da177e4
LT		 1112
1113 BT_DBG("num_rsp %d", ir.num_rsp);
1114
1115 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1116 ptr += sizeof(ir);
1117 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1118 ir.num_rsp))
1da177e4 1119 err = -EFAULT;
8e87d142 1120 } else
1da177e4
LT		 1121 err = -EFAULT;
1122
1123 kfree(buf);
1124
1125done:
1126 hci_dev_put(hdev);
1127 return err;
1128}
1129
3f0f524b
JH		 1130static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1131{
1132 u8 ad_len = 0, flags = 0;
1133 size_t name_len;
1134
f3d3444a 1135 if (test_bit(HCI_ADVERTISING, &hdev->dev_flags))
3f0f524b
JH		 1136 flags |= LE_AD_GENERAL;
1137
11802b29
JH		 1138 if (test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1139 if (lmp_le_br_capable(hdev))
1140 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1141 if (lmp_host_le_br_capable(hdev))
1142 flags |= LE_AD_SIM_LE_BREDR_HOST;
1143 } else {
3f0f524b 1144 flags |= LE_AD_NO_BREDR;
11802b29 1145 }
3f0f524b
JH		 1146
1147 if (flags) {
1148 BT_DBG("adv flags 0x%02x", flags);
1149
1150 ptr[0] = 2;
1151 ptr[1] = EIR_FLAGS;
1152 ptr[2] = flags;
1153
1154 ad_len += 3;
1155 ptr += 3;
1156 }
1157
1158 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1159 ptr[0] = 2;
1160 ptr[1] = EIR_TX_POWER;
1161 ptr[2] = (u8) hdev->adv_tx_power;
1162
1163 ad_len += 3;
1164 ptr += 3;
1165 }
1166
1167 name_len = strlen(hdev->dev_name);
1168 if (name_len > 0) {
1169 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1170
1171 if (name_len > max_len) {
1172 name_len = max_len;
1173 ptr[1] = EIR_NAME_SHORT;
1174 } else
1175 ptr[1] = EIR_NAME_COMPLETE;
1176
1177 ptr[0] = name_len + 1;
1178
1179 memcpy(ptr + 2, hdev->dev_name, name_len);
1180
1181 ad_len += (name_len + 2);
1182 ptr += (name_len + 2);
1183 }
1184
1185 return ad_len;
1186}
1187
04b4edcb 1188void hci_update_ad(struct hci_request *req)
3f0f524b 1189{
04b4edcb 1190 struct hci_dev *hdev = req->hdev;
3f0f524b
JH		 1191 struct hci_cp_le_set_adv_data cp;
1192 u8 len;
3f0f524b 1193
04b4edcb
JH		 1194 if (!lmp_le_capable(hdev))
1195 return;
3f0f524b
JH		 1196
1197 memset(&cp, 0, sizeof(cp));
1198
1199 len = create_ad(hdev, cp.data);
1200
1201 if (hdev->adv_data_len == len &&
04b4edcb
JH		 1202 memcmp(cp.data, hdev->adv_data, len) == 0)
1203 return;
3f0f524b
JH		 1204
1205 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1206 hdev->adv_data_len = len;
1207
1208 cp.length = len;
3f0f524b 1209
04b4edcb 1210 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH		 1211}
1212
cbed0ca1 1213static int hci_dev_do_open(struct hci_dev *hdev)
1da177e4 1214{
1da177e4
LT		 1215 int ret = 0;
1216
1da177e4
LT		 1217 BT_DBG("%s %p", hdev->name, hdev);
1218
1219 hci_req_lock(hdev);
1220
94324962
JH		 1221 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1222 ret = -ENODEV;
1223 goto done;
1224 }
1225
a5c8f270
MH		 1226 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
1227 /* Check for rfkill but allow the HCI setup stage to
1228 * proceed (which in itself doesn't cause any RF activity).
1229 */
1230 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
1231 ret = -ERFKILL;
1232 goto done;
1233 }
1234
1235 /* Check for valid public address or a configured static
1236 * random adddress, but let the HCI setup proceed to
1237 * be able to determine if there is a public address
1238 * or not.
1239 *
1240 * This check is only valid for BR/EDR controllers
1241 * since AMP controllers do not have an address.
1242 */
1243 if (hdev->dev_type == HCI_BREDR &&
1244 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1245 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1246 ret = -EADDRNOTAVAIL;
1247 goto done;
1248 }
611b30f7
MH		 1249 }
1250
1da177e4
LT		 1251 if (test_bit(HCI_UP, &hdev->flags)) {
1252 ret = -EALREADY;
1253 goto done;
1254 }
1255
1da177e4
LT		 1256 if (hdev->open(hdev)) {
1257 ret = -EIO;
1258 goto done;
1259 }
1260
f41c70c4
MH		 1261 atomic_set(&hdev->cmd_cnt, 1);
1262 set_bit(HCI_INIT, &hdev->flags);
1263
1264 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1265 ret = hdev->setup(hdev);
1266
1267 if (!ret) {
f41c70c4
MH		 1268 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1269 set_bit(HCI_RAW, &hdev->flags);
1270
0736cfa8
MH		 1271 if (!test_bit(HCI_RAW, &hdev->flags) &&
1272 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
f41c70c4 1273 ret = __hci_init(hdev);
1da177e4
LT		 1274 }
1275
f41c70c4
MH		 1276 clear_bit(HCI_INIT, &hdev->flags);
1277
1da177e4
LT		 1278 if (!ret) {
1279 hci_dev_hold(hdev);
1280 set_bit(HCI_UP, &hdev->flags);
1281 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a 1282 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
0736cfa8 1283 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1514b892 1284 hdev->dev_type == HCI_BREDR) {
09fd0de5 1285 hci_dev_lock(hdev);
744cf19e 1286 mgmt_powered(hdev, 1);
09fd0de5 1287 hci_dev_unlock(hdev);
56e5cb86 1288 }
8e87d142 1289 } else {
1da177e4 1290 /* Init failed, cleanup */
3eff45ea 1291 flush_work(&hdev->tx_work);
c347b765 1292 flush_work(&hdev->cmd_work);
b78752cc 1293 flush_work(&hdev->rx_work);
1da177e4
LT		 1294
1295 skb_queue_purge(&hdev->cmd_q);
1296 skb_queue_purge(&hdev->rx_q);
1297
1298 if (hdev->flush)
1299 hdev->flush(hdev);
1300
1301 if (hdev->sent_cmd) {
1302 kfree_skb(hdev->sent_cmd);
1303 hdev->sent_cmd = NULL;
1304 }
1305
1306 hdev->close(hdev);
1307 hdev->flags = 0;
1308 }
1309
1310done:
1311 hci_req_unlock(hdev);
1da177e4
LT		 1312 return ret;
1313}
1314
cbed0ca1
JH		 1315/* ---- HCI ioctl helpers ---- */
1316
1317int hci_dev_open(__u16 dev)
1318{
1319 struct hci_dev *hdev;
1320 int err;
1321
1322 hdev = hci_dev_get(dev);
1323 if (!hdev)
1324 return -ENODEV;
1325
e1d08f40
JH		 1326 /* We need to ensure that no other power on/off work is pending
1327 * before proceeding to call hci_dev_do_open. This is
1328 * particularly important if the setup procedure has not yet
1329 * completed.
1330 */
1331 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1332 cancel_delayed_work(&hdev->power_off);
1333
a5c8f270
MH		 1334 /* After this call it is guaranteed that the setup procedure
1335 * has finished. This means that error conditions like RFKILL
1336 * or no valid public or static random address apply.
1337 */
e1d08f40
JH		 1338 flush_workqueue(hdev->req_workqueue);
1339
cbed0ca1
JH		 1340 err = hci_dev_do_open(hdev);
1341
1342 hci_dev_put(hdev);
1343
1344 return err;
1345}
1346
1da177e4
LT		 1347static int hci_dev_do_close(struct hci_dev *hdev)
1348{
1349 BT_DBG("%s %p", hdev->name, hdev);
1350
78c04c0b
VCG		 1351 cancel_delayed_work(&hdev->power_off);
1352
1da177e4
LT		 1353 hci_req_cancel(hdev, ENODEV);
1354 hci_req_lock(hdev);
1355
1356 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1357 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1358 hci_req_unlock(hdev);
1359 return 0;
1360 }
1361
3eff45ea
GP		 1362 /* Flush RX and TX works */
1363 flush_work(&hdev->tx_work);
b78752cc 1364 flush_work(&hdev->rx_work);
1da177e4 1365
16ab91ab 1366 if (hdev->discov_timeout > 0) {
e0f9309f 1367 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1368 hdev->discov_timeout = 0;
5e5282bb 1369 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1370 }
1371
a8b2d5c2 1372 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1373 cancel_delayed_work(&hdev->service_cache);
1374
7ba8b4be
AG		 1375 cancel_delayed_work_sync(&hdev->le_scan_disable);
1376
09fd0de5 1377 hci_dev_lock(hdev);
1f9b9a5d 1378 hci_inquiry_cache_flush(hdev);
1da177e4 1379 hci_conn_hash_flush(hdev);
09fd0de5 1380 hci_dev_unlock(hdev);
1da177e4
LT		 1381
1382 hci_notify(hdev, HCI_DEV_DOWN);
1383
1384 if (hdev->flush)
1385 hdev->flush(hdev);
1386
1387 /* Reset device */
1388 skb_queue_purge(&hdev->cmd_q);
1389 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1390 if (!test_bit(HCI_RAW, &hdev->flags) &&
3a6afbd2 1391 !test_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
a6c511c6 1392 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1393 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1394 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1395 clear_bit(HCI_INIT, &hdev->flags);
1396 }
1397
c347b765
GP		 1398 /* flush cmd work */
1399 flush_work(&hdev->cmd_work);
1da177e4
LT		 1400
1401 /* Drop queues */
1402 skb_queue_purge(&hdev->rx_q);
1403 skb_queue_purge(&hdev->cmd_q);
1404 skb_queue_purge(&hdev->raw_q);
1405
1406 /* Drop last sent command */
1407 if (hdev->sent_cmd) {
b79f44c1 1408 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1409 kfree_skb(hdev->sent_cmd);
1410 hdev->sent_cmd = NULL;
1411 }
1412
b6ddb638
JH		 1413 kfree_skb(hdev->recv_evt);
1414 hdev->recv_evt = NULL;
1415
1da177e4
LT		 1416 /* After this point our queues are empty
1417 * and no tasks are scheduled. */
1418 hdev->close(hdev);
1419
35b973c9
JH		 1420 /* Clear flags */
1421 hdev->flags = 0;
1422 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1423
93c311a0
MH		 1424 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
1425 if (hdev->dev_type == HCI_BREDR) {
1426 hci_dev_lock(hdev);
1427 mgmt_powered(hdev, 0);
1428 hci_dev_unlock(hdev);
1429 }
8ee56540 1430 }
5add6af8 1431
ced5c338 1432 /* Controller radio is available but is currently powered down */
536619e8 1433 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 1434
e59fda8d 1435 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1436 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1437
1da177e4
LT		 1438 hci_req_unlock(hdev);
1439
1440 hci_dev_put(hdev);
1441 return 0;
1442}
1443
1444int hci_dev_close(__u16 dev)
1445{
1446 struct hci_dev *hdev;
1447 int err;
1448
70f23020
AE		 1449 hdev = hci_dev_get(dev);
1450 if (!hdev)
1da177e4 1451 return -ENODEV;
8ee56540 1452
0736cfa8
MH		 1453 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1454 err = -EBUSY;
1455 goto done;
1456 }
1457
8ee56540
MH		 1458 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1459 cancel_delayed_work(&hdev->power_off);
1460
1da177e4 1461 err = hci_dev_do_close(hdev);
8ee56540 1462
0736cfa8 1463done:
1da177e4
LT		 1464 hci_dev_put(hdev);
1465 return err;
1466}
1467
1468int hci_dev_reset(__u16 dev)
1469{
1470 struct hci_dev *hdev;
1471 int ret = 0;
1472
70f23020
AE		 1473 hdev = hci_dev_get(dev);
1474 if (!hdev)
1da177e4
LT		 1475 return -ENODEV;
1476
1477 hci_req_lock(hdev);
1da177e4 1478
808a049e
MH		 1479 if (!test_bit(HCI_UP, &hdev->flags)) {
1480 ret = -ENETDOWN;
1da177e4 1481 goto done;
808a049e 1482 }
1da177e4 1483
0736cfa8
MH		 1484 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1485 ret = -EBUSY;
1486 goto done;
1487 }
1488
1da177e4
LT		 1489 /* Drop queues */
1490 skb_queue_purge(&hdev->rx_q);
1491 skb_queue_purge(&hdev->cmd_q);
1492
09fd0de5 1493 hci_dev_lock(hdev);
1f9b9a5d 1494 hci_inquiry_cache_flush(hdev);
1da177e4 1495 hci_conn_hash_flush(hdev);
09fd0de5 1496 hci_dev_unlock(hdev);
1da177e4
LT		 1497
1498 if (hdev->flush)
1499 hdev->flush(hdev);
1500
8e87d142 1501 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1502 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1503
1504 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1505 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1506
1507done:
1da177e4
LT		 1508 hci_req_unlock(hdev);
1509 hci_dev_put(hdev);
1510 return ret;
1511}
1512
1513int hci_dev_reset_stat(__u16 dev)
1514{
1515 struct hci_dev *hdev;
1516 int ret = 0;
1517
70f23020
AE		 1518 hdev = hci_dev_get(dev);
1519 if (!hdev)
1da177e4
LT		 1520 return -ENODEV;
1521
0736cfa8
MH		 1522 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1523 ret = -EBUSY;
1524 goto done;
1525 }
1526
1da177e4
LT		 1527 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1528
0736cfa8 1529done:
1da177e4 1530 hci_dev_put(hdev);
1da177e4
LT		 1531 return ret;
1532}
1533
1534int hci_dev_cmd(unsigned int cmd, void __user *arg)
1535{
1536 struct hci_dev *hdev;
1537 struct hci_dev_req dr;
1538 int err = 0;
1539
1540 if (copy_from_user(&dr, arg, sizeof(dr)))
1541 return -EFAULT;
1542
70f23020
AE		 1543 hdev = hci_dev_get(dr.dev_id);
1544 if (!hdev)
1da177e4
LT		 1545 return -ENODEV;
1546
0736cfa8
MH		 1547 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1548 err = -EBUSY;
1549 goto done;
1550 }
1551
5b69bef5
MH		 1552 if (hdev->dev_type != HCI_BREDR) {
1553 err = -EOPNOTSUPP;
1554 goto done;
1555 }
1556
56f87901
JH		 1557 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1558 err = -EOPNOTSUPP;
1559 goto done;
1560 }
1561
1da177e4
LT		 1562 switch (cmd) {
1563 case HCISETAUTH:
01178cd4
JH		 1564 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1565 HCI_INIT_TIMEOUT);
1da177e4
LT		 1566 break;
1567
1568 case HCISETENCRYPT:
1569 if (!lmp_encrypt_capable(hdev)) {
1570 err = -EOPNOTSUPP;
1571 break;
1572 }
1573
1574 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1575 /* Auth must be enabled first */
01178cd4
JH		 1576 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1577 HCI_INIT_TIMEOUT);
1da177e4
LT		 1578 if (err)
1579 break;
1580 }
1581
01178cd4
JH		 1582 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1583 HCI_INIT_TIMEOUT);
1da177e4
LT		 1584 break;
1585
1586 case HCISETSCAN:
01178cd4
JH		 1587 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1588 HCI_INIT_TIMEOUT);
1da177e4
LT		 1589 break;
1590
1da177e4 1591 case HCISETLINKPOL:
01178cd4
JH		 1592 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1593 HCI_INIT_TIMEOUT);
1da177e4
LT		 1594 break;
1595
1596 case HCISETLINKMODE:
e4e8e37c
MH		 1597 hdev->link_mode = ((__u16) dr.dev_opt) &
1598 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1599 break;
1600
1601 case HCISETPTYPE:
1602 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1603 break;
1604
1605 case HCISETACLMTU:
e4e8e37c
MH		 1606 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1607 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1608 break;
1609
1610 case HCISETSCOMTU:
e4e8e37c
MH		 1611 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1612 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1613 break;
1614
1615 default:
1616 err = -EINVAL;
1617 break;
1618 }
e4e8e37c 1619
0736cfa8 1620done:
1da177e4
LT		 1621 hci_dev_put(hdev);
1622 return err;
1623}
1624
1625int hci_get_dev_list(void __user *arg)
1626{
8035ded4 1627 struct hci_dev *hdev;
1da177e4
LT		 1628 struct hci_dev_list_req *dl;
1629 struct hci_dev_req *dr;
1da177e4
LT		 1630 int n = 0, size, err;
1631 __u16 dev_num;
1632
1633 if (get_user(dev_num, (__u16 __user *) arg))
1634 return -EFAULT;
1635
1636 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1637 return -EINVAL;
1638
1639 size = sizeof(*dl) + dev_num * sizeof(*dr);
1640
70f23020
AE		 1641 dl = kzalloc(size, GFP_KERNEL);
1642 if (!dl)
1da177e4
LT		 1643 return -ENOMEM;
1644
1645 dr = dl->dev_req;
1646
f20d09d5 1647 read_lock(&hci_dev_list_lock);
8035ded4 1648 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1649 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1650 cancel_delayed_work(&hdev->power_off);
c542a06c 1651
a8b2d5c2
JH		 1652 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1653 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1654
1da177e4
LT		 1655 (dr + n)->dev_id = hdev->id;
1656 (dr + n)->dev_opt = hdev->flags;
c542a06c 1657
1da177e4
LT		 1658 if (++n >= dev_num)
1659 break;
1660 }
f20d09d5 1661 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1662
1663 dl->dev_num = n;
1664 size = sizeof(*dl) + n * sizeof(*dr);
1665
1666 err = copy_to_user(arg, dl, size);
1667 kfree(dl);
1668
1669 return err ? -EFAULT : 0;
1670}
1671
1672int hci_get_dev_info(void __user *arg)
1673{
1674 struct hci_dev *hdev;
1675 struct hci_dev_info di;
1676 int err = 0;
1677
1678 if (copy_from_user(&di, arg, sizeof(di)))
1679 return -EFAULT;
1680
70f23020
AE		 1681 hdev = hci_dev_get(di.dev_id);
1682 if (!hdev)
1da177e4
LT		 1683 return -ENODEV;
1684
a8b2d5c2 1685 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1686 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1687
a8b2d5c2
JH		 1688 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1689 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1690
1da177e4
LT		 1691 strcpy(di.name, hdev->name);
1692 di.bdaddr = hdev->bdaddr;
60f2a3ed 1693 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
1da177e4
LT		 1694 di.flags = hdev->flags;
1695 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1696 if (lmp_bredr_capable(hdev)) {
1697 di.acl_mtu = hdev->acl_mtu;
1698 di.acl_pkts = hdev->acl_pkts;
1699 di.sco_mtu = hdev->sco_mtu;
1700 di.sco_pkts = hdev->sco_pkts;
1701 } else {
1702 di.acl_mtu = hdev->le_mtu;
1703 di.acl_pkts = hdev->le_pkts;
1704 di.sco_mtu = 0;
1705 di.sco_pkts = 0;
1706 }
1da177e4
LT		 1707 di.link_policy = hdev->link_policy;
1708 di.link_mode = hdev->link_mode;
1709
1710 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1711 memcpy(&di.features, &hdev->features, sizeof(di.features));
1712
1713 if (copy_to_user(arg, &di, sizeof(di)))
1714 err = -EFAULT;
1715
1716 hci_dev_put(hdev);
1717
1718 return err;
1719}
1720
1721/* ---- Interface to HCI drivers ---- */
1722
611b30f7
MH		 1723static int hci_rfkill_set_block(void *data, bool blocked)
1724{
1725 struct hci_dev *hdev = data;
1726
1727 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1728
0736cfa8
MH		 1729 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
1730 return -EBUSY;
1731
5e130367
JH		 1732 if (blocked) {
1733 set_bit(HCI_RFKILLED, &hdev->dev_flags);
bf543036
JH		 1734 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1735 hci_dev_do_close(hdev);
5e130367
JH		 1736 } else {
1737 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1025c04c 1738 }
611b30f7
MH		 1739
1740 return 0;
1741}
1742
1743static const struct rfkill_ops hci_rfkill_ops = {
1744 .set_block = hci_rfkill_set_block,
1745};
1746
ab81cbf9
JH		 1747static void hci_power_on(struct work_struct *work)
1748{
1749 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1750 int err;
ab81cbf9
JH		 1751
1752 BT_DBG("%s", hdev->name);
1753
cbed0ca1 1754 err = hci_dev_do_open(hdev);
96570ffc
JH		 1755 if (err < 0) {
1756 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1757 return;
96570ffc 1758 }
ab81cbf9 1759
a5c8f270
MH		 1760 /* During the HCI setup phase, a few error conditions are
1761 * ignored and they need to be checked now. If they are still
1762 * valid, it is important to turn the device back off.
1763 */
1764 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) ||
1765 (hdev->dev_type == HCI_BREDR &&
1766 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1767 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
bf543036
JH		 1768 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1769 hci_dev_do_close(hdev);
1770 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
19202573
JH		 1771 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1772 HCI_AUTO_OFF_TIMEOUT);
bf543036 1773 }
ab81cbf9 1774
a8b2d5c2 1775 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1776 mgmt_index_added(hdev);
ab81cbf9
JH		 1777}
1778
1779static void hci_power_off(struct work_struct *work)
1780{
3243553f 1781 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1782 power_off.work);
ab81cbf9
JH		 1783
1784 BT_DBG("%s", hdev->name);
1785
8ee56540 1786 hci_dev_do_close(hdev);
ab81cbf9
JH		 1787}
1788
16ab91ab
JH		 1789static void hci_discov_off(struct work_struct *work)
1790{
1791 struct hci_dev *hdev;
1792 u8 scan = SCAN_PAGE;
1793
1794 hdev = container_of(work, struct hci_dev, discov_off.work);
1795
1796 BT_DBG("%s", hdev->name);
1797
09fd0de5 1798 hci_dev_lock(hdev);
16ab91ab
JH		 1799
1800 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1801
1802 hdev->discov_timeout = 0;
1803
09fd0de5 1804 hci_dev_unlock(hdev);
16ab91ab
JH		 1805}
1806
2aeb9a1a
JH		 1807int hci_uuids_clear(struct hci_dev *hdev)
1808{
4821002c 1809 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1810
4821002c
JH		 1811 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1812 list_del(&uuid->list);
2aeb9a1a
JH		 1813 kfree(uuid);
1814 }
1815
1816 return 0;
1817}
1818
55ed8ca1
JH		 1819int hci_link_keys_clear(struct hci_dev *hdev)
1820{
1821 struct list_head *p, *n;
1822
1823 list_for_each_safe(p, n, &hdev->link_keys) {
1824 struct link_key *key;
1825
1826 key = list_entry(p, struct link_key, list);
1827
1828 list_del(p);
1829 kfree(key);
1830 }
1831
1832 return 0;
1833}
1834
b899efaf
VCG		 1835int hci_smp_ltks_clear(struct hci_dev *hdev)
1836{
1837 struct smp_ltk *k, *tmp;
1838
1839 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1840 list_del(&k->list);
1841 kfree(k);
1842 }
1843
1844 return 0;
1845}
1846
55ed8ca1
JH		 1847struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1848{
8035ded4 1849 struct link_key *k;
55ed8ca1 1850
8035ded4 1851 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1852 if (bacmp(bdaddr, &k->bdaddr) == 0)
1853 return k;
55ed8ca1
JH		 1854
1855 return NULL;
1856}
1857
745c0ce3 1858static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1859 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1860{
1861 /* Legacy key */
1862 if (key_type < 0x03)
745c0ce3 1863 return true;
d25e28ab
JH		 1864
1865 /* Debug keys are insecure so don't store them persistently */
1866 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1867 return false;
d25e28ab
JH		 1868
1869 /* Changed combination key and there's no previous one */
1870 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1871 return false;
d25e28ab
JH		 1872
1873 /* Security mode 3 case */
1874 if (!conn)
745c0ce3 1875 return true;
d25e28ab
JH		 1876
1877 /* Neither local nor remote side had no-bonding as requirement */
1878 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1879 return true;
d25e28ab
JH		 1880
1881 /* Local side had dedicated bonding as requirement */
1882 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1883 return true;
d25e28ab
JH		 1884
1885 /* Remote side had dedicated bonding as requirement */
1886 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1887 return true;
d25e28ab
JH		 1888
1889 /* If none of the above criteria match, then don't store the key
1890 * persistently */
745c0ce3 1891 return false;
d25e28ab
JH		 1892}
1893
c9839a11 1894struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1895{
c9839a11 1896 struct smp_ltk *k;
75d262c2 1897
c9839a11
VCG		 1898 list_for_each_entry(k, &hdev->long_term_keys, list) {
1899 if (k->ediv != ediv ||
a8c5fb1a 1900 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1901 continue;
1902
c9839a11 1903 return k;
75d262c2
VCG		 1904 }
1905
1906 return NULL;
1907}
75d262c2 1908
c9839a11 1909struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1910 u8 addr_type)
75d262c2 1911{
c9839a11 1912 struct smp_ltk *k;
75d262c2 1913
c9839a11
VCG		 1914 list_for_each_entry(k, &hdev->long_term_keys, list)
1915 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1916 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1917 return k;
1918
1919 return NULL;
1920}
75d262c2 1921
d25e28ab 1922int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1923 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1924{
1925 struct link_key *key, *old_key;
745c0ce3
VA		 1926 u8 old_key_type;
1927 bool persistent;
55ed8ca1
JH		 1928
1929 old_key = hci_find_link_key(hdev, bdaddr);
1930 if (old_key) {
1931 old_key_type = old_key->type;
1932 key = old_key;
1933 } else {
12adcf3a 1934 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1935 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1936 if (!key)
1937 return -ENOMEM;
1938 list_add(&key->list, &hdev->link_keys);
1939 }
1940
6ed93dc6 1941 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1942
d25e28ab
JH		 1943 /* Some buggy controller combinations generate a changed
1944 * combination key for legacy pairing even when there's no
1945 * previous key */
1946 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1947 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1948 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1949 if (conn)
1950 conn->key_type = type;
1951 }
d25e28ab 1952
55ed8ca1 1953 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1954 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1955 key->pin_len = pin_len;
1956
b6020ba0 1957 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1958 key->type = old_key_type;
4748fed2
JH		 1959 else
1960 key->type = type;
1961
4df378a1
JH		 1962 if (!new_key)
1963 return 0;
1964
1965 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1966
744cf19e 1967 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1968
6ec5bcad
VA		 1969 if (conn)
1970 conn->flush_key = !persistent;
55ed8ca1
JH		 1971
1972 return 0;
1973}
1974
c9839a11 1975int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1976 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1977 ediv, u8 rand[8])
75d262c2 1978{
c9839a11 1979 struct smp_ltk *key, *old_key;
75d262c2 1980
c9839a11
VCG		 1981 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1982 return 0;
75d262c2 1983
c9839a11
VCG		 1984 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1985 if (old_key)
75d262c2 1986 key = old_key;
c9839a11
VCG		 1987 else {
1988 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1989 if (!key)
1990 return -ENOMEM;
c9839a11 1991 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1992 }
1993
75d262c2 1994 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1995 key->bdaddr_type = addr_type;
1996 memcpy(key->val, tk, sizeof(key->val));
1997 key->authenticated = authenticated;
1998 key->ediv = ediv;
1999 key->enc_size = enc_size;
2000 key->type = type;
2001 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 2002
c9839a11
VCG		 2003 if (!new_key)
2004 return 0;
75d262c2 2005
261cc5aa
VCG		 2006 if (type & HCI_SMP_LTK)
2007 mgmt_new_ltk(hdev, key, 1);
2008
75d262c2
VCG		 2009 return 0;
2010}
2011
55ed8ca1
JH		 2012int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2013{
2014 struct link_key *key;
2015
2016 key = hci_find_link_key(hdev, bdaddr);
2017 if (!key)
2018 return -ENOENT;
2019
6ed93dc6 2020 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 2021
2022 list_del(&key->list);
2023 kfree(key);
2024
2025 return 0;
2026}
2027
b899efaf
VCG		 2028int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
2029{
2030 struct smp_ltk *k, *tmp;
2031
2032 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
2033 if (bacmp(bdaddr, &k->bdaddr))
2034 continue;
2035
6ed93dc6 2036 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 2037
2038 list_del(&k->list);
2039 kfree(k);
2040 }
2041
2042 return 0;
2043}
2044
6bd32326 2045/* HCI command timer function */
bda4f23a 2046static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 2047{
2048 struct hci_dev *hdev = (void *) arg;
2049
bda4f23a
AE		 2050 if (hdev->sent_cmd) {
2051 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2052 u16 opcode = __le16_to_cpu(sent->opcode);
2053
2054 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2055 } else {
2056 BT_ERR("%s command tx timeout", hdev->name);
2057 }
2058
6bd32326 2059 atomic_set(&hdev->cmd_cnt, 1);
c347b765 2060 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 2061}
2062
2763eda6 2063struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 2064 bdaddr_t *bdaddr)
2763eda6
SJ		 2065{
2066 struct oob_data *data;
2067
2068 list_for_each_entry(data, &hdev->remote_oob_data, list)
2069 if (bacmp(bdaddr, &data->bdaddr) == 0)
2070 return data;
2071
2072 return NULL;
2073}
2074
2075int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
2076{
2077 struct oob_data *data;
2078
2079 data = hci_find_remote_oob_data(hdev, bdaddr);
2080 if (!data)
2081 return -ENOENT;
2082
6ed93dc6 2083 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2084
2085 list_del(&data->list);
2086 kfree(data);
2087
2088 return 0;
2089}
2090
2091int hci_remote_oob_data_clear(struct hci_dev *hdev)
2092{
2093 struct oob_data *data, *n;
2094
2095 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2096 list_del(&data->list);
2097 kfree(data);
2098 }
2099
2100 return 0;
2101}
2102
2103int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 2104 u8 *randomizer)
2763eda6
SJ		 2105{
2106 struct oob_data *data;
2107
2108 data = hci_find_remote_oob_data(hdev, bdaddr);
2109
2110 if (!data) {
2111 data = kmalloc(sizeof(*data), GFP_ATOMIC);
2112 if (!data)
2113 return -ENOMEM;
2114
2115 bacpy(&data->bdaddr, bdaddr);
2116 list_add(&data->list, &hdev->remote_oob_data);
2117 }
2118
2119 memcpy(data->hash, hash, sizeof(data->hash));
2120 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
2121
6ed93dc6 2122 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2123
2124 return 0;
2125}
2126
04124681 2127struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 2128{
8035ded4 2129 struct bdaddr_list *b;
b2a66aad 2130
8035ded4 2131 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 2132 if (bacmp(bdaddr, &b->bdaddr) == 0)
2133 return b;
b2a66aad
AJ		 2134
2135 return NULL;
2136}
2137
2138int hci_blacklist_clear(struct hci_dev *hdev)
2139{
2140 struct list_head *p, *n;
2141
2142 list_for_each_safe(p, n, &hdev->blacklist) {
2143 struct bdaddr_list *b;
2144
2145 b = list_entry(p, struct bdaddr_list, list);
2146
2147 list_del(p);
2148 kfree(b);
2149 }
2150
2151 return 0;
2152}
2153
88c1fe4b 2154int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2155{
2156 struct bdaddr_list *entry;
b2a66aad
AJ		 2157
2158 if (bacmp(bdaddr, BDADDR_ANY) == 0)
2159 return -EBADF;
2160
5e762444
AJ		 2161 if (hci_blacklist_lookup(hdev, bdaddr))
2162 return -EEXIST;
b2a66aad
AJ		 2163
2164 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 2165 if (!entry)
2166 return -ENOMEM;
b2a66aad
AJ		 2167
2168 bacpy(&entry->bdaddr, bdaddr);
2169
2170 list_add(&entry->list, &hdev->blacklist);
2171
88c1fe4b 2172 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 2173}
2174
88c1fe4b 2175int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2176{
2177 struct bdaddr_list *entry;
b2a66aad 2178
1ec918ce 2179 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 2180 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 2181
2182 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 2183 if (!entry)
5e762444 2184 return -ENOENT;
b2a66aad
AJ		 2185
2186 list_del(&entry->list);
2187 kfree(entry);
2188
88c1fe4b 2189 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 2190}
2191
4c87eaab 2192static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2193{
4c87eaab
AG		 2194 if (status) {
2195 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 2196
4c87eaab
AG		 2197 hci_dev_lock(hdev);
2198 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2199 hci_dev_unlock(hdev);
2200 return;
2201 }
7ba8b4be
AG		 2202}
2203
4c87eaab 2204static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2205{
4c87eaab
AG		 2206 /* General inquiry access code (GIAC) */
2207 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2208 struct hci_request req;
2209 struct hci_cp_inquiry cp;
7ba8b4be
AG		 2210 int err;
2211
4c87eaab
AG		 2212 if (status) {
2213 BT_ERR("Failed to disable LE scanning: status %d", status);
2214 return;
2215 }
7ba8b4be 2216
4c87eaab
AG		 2217 switch (hdev->discovery.type) {
2218 case DISCOV_TYPE_LE:
2219 hci_dev_lock(hdev);
2220 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2221 hci_dev_unlock(hdev);
2222 break;
7ba8b4be 2223
4c87eaab
AG		 2224 case DISCOV_TYPE_INTERLEAVED:
2225 hci_req_init(&req, hdev);
7ba8b4be 2226
4c87eaab
AG		 2227 memset(&cp, 0, sizeof(cp));
2228 memcpy(&cp.lap, lap, sizeof(cp.lap));
2229 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2230 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 2231
4c87eaab 2232 hci_dev_lock(hdev);
7dbfac1d 2233
4c87eaab 2234 hci_inquiry_cache_flush(hdev);
7dbfac1d 2235
4c87eaab
AG		 2236 err = hci_req_run(&req, inquiry_complete);
2237 if (err) {
2238 BT_ERR("Inquiry request failed: err %d", err);
2239 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2240 }
7dbfac1d 2241
4c87eaab
AG		 2242 hci_dev_unlock(hdev);
2243 break;
7dbfac1d 2244 }
7dbfac1d
AG		 2245}
2246
7ba8b4be
AG		 2247static void le_scan_disable_work(struct work_struct *work)
2248{
2249 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2250 le_scan_disable.work);
7ba8b4be 2251 struct hci_cp_le_set_scan_enable cp;
4c87eaab
AG		 2252 struct hci_request req;
2253 int err;
7ba8b4be
AG		 2254
2255 BT_DBG("%s", hdev->name);
2256
4c87eaab 2257 hci_req_init(&req, hdev);
28b75a89 2258
7ba8b4be 2259 memset(&cp, 0, sizeof(cp));
4c87eaab
AG		 2260 cp.enable = LE_SCAN_DISABLE;
2261 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
28b75a89 2262
4c87eaab
AG		 2263 err = hci_req_run(&req, le_scan_disable_work_complete);
2264 if (err)
2265 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 2266}
2267
9be0dab7
DH		 2268/* Alloc HCI device */
2269struct hci_dev *hci_alloc_dev(void)
2270{
2271 struct hci_dev *hdev;
2272
2273 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2274 if (!hdev)
2275 return NULL;
2276
b1b813d4
DH		 2277 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2278 hdev->esco_type = (ESCO_HV1);
2279 hdev->link_mode = (HCI_LM_ACCEPT);
b4cb9fb2
MH		 2280 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2281 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 2282 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2283 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2284
b1b813d4
DH		 2285 hdev->sniff_max_interval = 800;
2286 hdev->sniff_min_interval = 80;
2287
bef64738
MH		 2288 hdev->le_scan_interval = 0x0060;
2289 hdev->le_scan_window = 0x0030;
2290
b1b813d4
DH		 2291 mutex_init(&hdev->lock);
2292 mutex_init(&hdev->req_lock);
2293
2294 INIT_LIST_HEAD(&hdev->mgmt_pending);
2295 INIT_LIST_HEAD(&hdev->blacklist);
2296 INIT_LIST_HEAD(&hdev->uuids);
2297 INIT_LIST_HEAD(&hdev->link_keys);
2298 INIT_LIST_HEAD(&hdev->long_term_keys);
2299 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 2300 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2301
2302 INIT_WORK(&hdev->rx_work, hci_rx_work);
2303 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2304 INIT_WORK(&hdev->tx_work, hci_tx_work);
2305 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 2306
b1b813d4
DH		 2307 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2308 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2309 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2310
b1b813d4
DH		 2311 skb_queue_head_init(&hdev->rx_q);
2312 skb_queue_head_init(&hdev->cmd_q);
2313 skb_queue_head_init(&hdev->raw_q);
2314
2315 init_waitqueue_head(&hdev->req_wait_q);
2316
bda4f23a 2317 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2318
b1b813d4
DH		 2319 hci_init_sysfs(hdev);
2320 discovery_init(hdev);
9be0dab7
DH		 2321
2322 return hdev;
2323}
2324EXPORT_SYMBOL(hci_alloc_dev);
2325
2326/* Free HCI device */
2327void hci_free_dev(struct hci_dev *hdev)
2328{
9be0dab7
DH		 2329 /* will free via device release */
2330 put_device(&hdev->dev);
2331}
2332EXPORT_SYMBOL(hci_free_dev);
2333
1da177e4
LT		 2334/* Register HCI device */
2335int hci_register_dev(struct hci_dev *hdev)
2336{
b1b813d4 2337 int id, error;
1da177e4 2338
010666a1 2339 if (!hdev->open || !hdev->close)
1da177e4
LT		 2340 return -EINVAL;
2341
08add513
MM		 2342 /* Do not allow HCI_AMP devices to register at index 0,
2343 * so the index can be used as the AMP controller ID.
2344 */
3df92b31
SL		 2345 switch (hdev->dev_type) {
2346 case HCI_BREDR:
2347 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2348 break;
2349 case HCI_AMP:
2350 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2351 break;
2352 default:
2353 return -EINVAL;
1da177e4 2354 }
8e87d142 2355
3df92b31
SL		 2356 if (id < 0)
2357 return id;
2358
1da177e4
LT		 2359 sprintf(hdev->name, "hci%d", id);
2360 hdev->id = id;
2d8b3a11
AE		 2361
2362 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2363
d8537548
KC		 2364 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2365 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 2366 if (!hdev->workqueue) {
2367 error = -ENOMEM;
2368 goto err;
2369 }
f48fd9c8 2370
d8537548
KC		 2371 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2372 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 2373 if (!hdev->req_workqueue) {
2374 destroy_workqueue(hdev->workqueue);
2375 error = -ENOMEM;
2376 goto err;
2377 }
2378
33ca954d
DH		 2379 error = hci_add_sysfs(hdev);
2380 if (error < 0)
2381 goto err_wqueue;
1da177e4 2382
611b30f7 2383 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2384 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2385 hdev);
611b30f7
MH		 2386 if (hdev->rfkill) {
2387 if (rfkill_register(hdev->rfkill) < 0) {
2388 rfkill_destroy(hdev->rfkill);
2389 hdev->rfkill = NULL;
2390 }
2391 }
2392
5e130367
JH		 2393 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2394 set_bit(HCI_RFKILLED, &hdev->dev_flags);
2395
a8b2d5c2 2396 set_bit(HCI_SETUP, &hdev->dev_flags);
004b0258 2397 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ce2be9ac 2398
01cd3404 2399 if (hdev->dev_type == HCI_BREDR) {
56f87901
JH		 2400 /* Assume BR/EDR support until proven otherwise (such as
2401 * through reading supported features during init.
2402 */
2403 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2404 }
ce2be9ac 2405
fcee3377
GP		 2406 write_lock(&hci_dev_list_lock);
2407 list_add(&hdev->list, &hci_dev_list);
2408 write_unlock(&hci_dev_list_lock);
2409
1da177e4 2410 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2411 hci_dev_hold(hdev);
1da177e4 2412
19202573 2413 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2414
1da177e4 2415 return id;
f48fd9c8 2416
33ca954d
DH		 2417err_wqueue:
2418 destroy_workqueue(hdev->workqueue);
6ead1bbc 2419 destroy_workqueue(hdev->req_workqueue);
33ca954d 2420err:
3df92b31 2421 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 2422
33ca954d 2423 return error;
1da177e4
LT		 2424}
2425EXPORT_SYMBOL(hci_register_dev);
2426
2427/* Unregister HCI device */
59735631 2428void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2429{
3df92b31 2430 int i, id;
ef222013 2431
c13854ce 2432 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2433
94324962
JH		 2434 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2435
3df92b31
SL		 2436 id = hdev->id;
2437
f20d09d5 2438 write_lock(&hci_dev_list_lock);
1da177e4 2439 list_del(&hdev->list);
f20d09d5 2440 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2441
2442 hci_dev_do_close(hdev);
2443
cd4c5391 2444 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2445 kfree_skb(hdev->reassembly[i]);
2446
b9b5ef18
GP		 2447 cancel_work_sync(&hdev->power_on);
2448
ab81cbf9 2449 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2450 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2451 hci_dev_lock(hdev);
744cf19e 2452 mgmt_index_removed(hdev);
09fd0de5 2453 hci_dev_unlock(hdev);
56e5cb86 2454 }
ab81cbf9 2455
2e58ef3e
JH		 2456 /* mgmt_index_removed should take care of emptying the
2457 * pending list */
2458 BUG_ON(!list_empty(&hdev->mgmt_pending));
2459
1da177e4
LT		 2460 hci_notify(hdev, HCI_DEV_UNREG);
2461
611b30f7
MH		 2462 if (hdev->rfkill) {
2463 rfkill_unregister(hdev->rfkill);
2464 rfkill_destroy(hdev->rfkill);
2465 }
2466
ce242970 2467 hci_del_sysfs(hdev);
147e2d59 2468
f48fd9c8 2469 destroy_workqueue(hdev->workqueue);
6ead1bbc 2470 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2471
09fd0de5 2472 hci_dev_lock(hdev);
e2e0cacb 2473 hci_blacklist_clear(hdev);
2aeb9a1a 2474 hci_uuids_clear(hdev);
55ed8ca1 2475 hci_link_keys_clear(hdev);
b899efaf 2476 hci_smp_ltks_clear(hdev);
2763eda6 2477 hci_remote_oob_data_clear(hdev);
09fd0de5 2478 hci_dev_unlock(hdev);
e2e0cacb 2479
dc946bd8 2480 hci_dev_put(hdev);
3df92b31
SL		 2481
2482 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2483}
2484EXPORT_SYMBOL(hci_unregister_dev);
2485
2486/* Suspend HCI device */
2487int hci_suspend_dev(struct hci_dev *hdev)
2488{
2489 hci_notify(hdev, HCI_DEV_SUSPEND);
2490 return 0;
2491}
2492EXPORT_SYMBOL(hci_suspend_dev);
2493
2494/* Resume HCI device */
2495int hci_resume_dev(struct hci_dev *hdev)
2496{
2497 hci_notify(hdev, HCI_DEV_RESUME);
2498 return 0;
2499}
2500EXPORT_SYMBOL(hci_resume_dev);
2501
76bca880 2502/* Receive frame from HCI drivers */
e1a26170 2503int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 2504{
76bca880 2505 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2506 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2507 kfree_skb(skb);
2508 return -ENXIO;
2509 }
2510
d82603c6 2511 /* Incoming skb */
76bca880
MH		 2512 bt_cb(skb)->incoming = 1;
2513
2514 /* Time stamp */
2515 __net_timestamp(skb);
2516
76bca880 2517 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2518 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2519
76bca880
MH		 2520 return 0;
2521}
2522EXPORT_SYMBOL(hci_recv_frame);
2523
33e882a5 2524static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2525 int count, __u8 index)
33e882a5
SS		 2526{
2527 int len = 0;
2528 int hlen = 0;
2529 int remain = count;
2530 struct sk_buff *skb;
2531 struct bt_skb_cb *scb;
2532
2533 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2534 index >= NUM_REASSEMBLY)
33e882a5
SS		 2535 return -EILSEQ;
2536
2537 skb = hdev->reassembly[index];
2538
2539 if (!skb) {
2540 switch (type) {
2541 case HCI_ACLDATA_PKT:
2542 len = HCI_MAX_FRAME_SIZE;
2543 hlen = HCI_ACL_HDR_SIZE;
2544 break;
2545 case HCI_EVENT_PKT:
2546 len = HCI_MAX_EVENT_SIZE;
2547 hlen = HCI_EVENT_HDR_SIZE;
2548 break;
2549 case HCI_SCODATA_PKT:
2550 len = HCI_MAX_SCO_SIZE;
2551 hlen = HCI_SCO_HDR_SIZE;
2552 break;
2553 }
2554
1e429f38 2555 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2556 if (!skb)
2557 return -ENOMEM;
2558
2559 scb = (void *) skb->cb;
2560 scb->expect = hlen;
2561 scb->pkt_type = type;
2562
33e882a5
SS		 2563 hdev->reassembly[index] = skb;
2564 }
2565
2566 while (count) {
2567 scb = (void *) skb->cb;
89bb46d0 2568 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2569
2570 memcpy(skb_put(skb, len), data, len);
2571
2572 count -= len;
2573 data += len;
2574 scb->expect -= len;
2575 remain = count;
2576
2577 switch (type) {
2578 case HCI_EVENT_PKT:
2579 if (skb->len == HCI_EVENT_HDR_SIZE) {
2580 struct hci_event_hdr *h = hci_event_hdr(skb);
2581 scb->expect = h->plen;
2582
2583 if (skb_tailroom(skb) < scb->expect) {
2584 kfree_skb(skb);
2585 hdev->reassembly[index] = NULL;
2586 return -ENOMEM;
2587 }
2588 }
2589 break;
2590
2591 case HCI_ACLDATA_PKT:
2592 if (skb->len == HCI_ACL_HDR_SIZE) {
2593 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2594 scb->expect = __le16_to_cpu(h->dlen);
2595
2596 if (skb_tailroom(skb) < scb->expect) {
2597 kfree_skb(skb);
2598 hdev->reassembly[index] = NULL;
2599 return -ENOMEM;
2600 }
2601 }
2602 break;
2603
2604 case HCI_SCODATA_PKT:
2605 if (skb->len == HCI_SCO_HDR_SIZE) {
2606 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2607 scb->expect = h->dlen;
2608
2609 if (skb_tailroom(skb) < scb->expect) {
2610 kfree_skb(skb);
2611 hdev->reassembly[index] = NULL;
2612 return -ENOMEM;
2613 }
2614 }
2615 break;
2616 }
2617
2618 if (scb->expect == 0) {
2619 /* Complete frame */
2620
2621 bt_cb(skb)->pkt_type = type;
e1a26170 2622 hci_recv_frame(hdev, skb);
33e882a5
SS		 2623
2624 hdev->reassembly[index] = NULL;
2625 return remain;
2626 }
2627 }
2628
2629 return remain;
2630}
2631
ef222013
MH		 2632int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2633{
f39a3c06
SS		 2634 int rem = 0;
2635
ef222013
MH		 2636 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2637 return -EILSEQ;
2638
da5f6c37 2639 while (count) {
1e429f38 2640 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2641 if (rem < 0)
2642 return rem;
ef222013 2643
f39a3c06
SS		 2644 data += (count - rem);
2645 count = rem;
f81c6224 2646 }
ef222013 2647
f39a3c06 2648 return rem;
ef222013
MH		 2649}
2650EXPORT_SYMBOL(hci_recv_fragment);
2651
99811510
SS		 2652#define STREAM_REASSEMBLY 0
2653
2654int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2655{
2656 int type;
2657 int rem = 0;
2658
da5f6c37 2659 while (count) {
99811510
SS		 2660 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2661
2662 if (!skb) {
2663 struct { char type; } *pkt;
2664
2665 /* Start of the frame */
2666 pkt = data;
2667 type = pkt->type;
2668
2669 data++;
2670 count--;
2671 } else
2672 type = bt_cb(skb)->pkt_type;
2673
1e429f38 2674 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2675 STREAM_REASSEMBLY);
99811510
SS		 2676 if (rem < 0)
2677 return rem;
2678
2679 data += (count - rem);
2680 count = rem;
f81c6224 2681 }
99811510
SS		 2682
2683 return rem;
2684}
2685EXPORT_SYMBOL(hci_recv_stream_fragment);
2686
1da177e4
LT		 2687/* ---- Interface to upper protocols ---- */
2688
1da177e4
LT		 2689int hci_register_cb(struct hci_cb *cb)
2690{
2691 BT_DBG("%p name %s", cb, cb->name);
2692
f20d09d5 2693 write_lock(&hci_cb_list_lock);
1da177e4 2694 list_add(&cb->list, &hci_cb_list);
f20d09d5 2695 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2696
2697 return 0;
2698}
2699EXPORT_SYMBOL(hci_register_cb);
2700
2701int hci_unregister_cb(struct hci_cb *cb)
2702{
2703 BT_DBG("%p name %s", cb, cb->name);
2704
f20d09d5 2705 write_lock(&hci_cb_list_lock);
1da177e4 2706 list_del(&cb->list);
f20d09d5 2707 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2708
2709 return 0;
2710}
2711EXPORT_SYMBOL(hci_unregister_cb);
2712
51086991 2713static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 2714{
0d48d939 2715 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2716
cd82e61c
MH		 2717 /* Time stamp */
2718 __net_timestamp(skb);
1da177e4 2719
cd82e61c
MH		 2720 /* Send copy to monitor */
2721 hci_send_to_monitor(hdev, skb);
2722
2723 if (atomic_read(&hdev->promisc)) {
2724 /* Send copy to the sockets */
470fe1b5 2725 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2726 }
2727
2728 /* Get rid of skb owner, prior to sending to the driver. */
2729 skb_orphan(skb);
2730
7bd8f09f 2731 if (hdev->send(hdev, skb) < 0)
51086991 2732 BT_ERR("%s sending frame failed", hdev->name);
1da177e4
LT		 2733}
2734
3119ae95
JH		 2735void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2736{
2737 skb_queue_head_init(&req->cmd_q);
2738 req->hdev = hdev;
5d73e034 2739 req->err = 0;
3119ae95
JH		 2740}
2741
2742int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2743{
2744 struct hci_dev *hdev = req->hdev;
2745 struct sk_buff *skb;
2746 unsigned long flags;
2747
2748 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2749
5d73e034
AG		 2750 /* If an error occured during request building, remove all HCI
2751 * commands queued on the HCI request queue.
2752 */
2753 if (req->err) {
2754 skb_queue_purge(&req->cmd_q);
2755 return req->err;
2756 }
2757
3119ae95
JH		 2758 /* Do not allow empty requests */
2759 if (skb_queue_empty(&req->cmd_q))
382b0c39 2760 return -ENODATA;
3119ae95
JH		 2761
2762 skb = skb_peek_tail(&req->cmd_q);
2763 bt_cb(skb)->req.complete = complete;
2764
2765 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2766 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2767 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2768
2769 queue_work(hdev->workqueue, &hdev->cmd_work);
2770
2771 return 0;
2772}
2773
1ca3a9d0 2774static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2775 u32 plen, const void *param)
1da177e4
LT		 2776{
2777 int len = HCI_COMMAND_HDR_SIZE + plen;
2778 struct hci_command_hdr *hdr;
2779 struct sk_buff *skb;
2780
1da177e4 2781 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2782 if (!skb)
2783 return NULL;
1da177e4
LT		 2784
2785 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2786 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2787 hdr->plen = plen;
2788
2789 if (plen)
2790 memcpy(skb_put(skb, plen), param, plen);
2791
2792 BT_DBG("skb len %d", skb->len);
2793
0d48d939 2794 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
c78ae283 2795
1ca3a9d0
JH		 2796 return skb;
2797}
2798
2799/* Send HCI command */
07dc93dd
JH		 2800int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2801 const void *param)
1ca3a9d0
JH		 2802{
2803 struct sk_buff *skb;
2804
2805 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2806
2807 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2808 if (!skb) {
2809 BT_ERR("%s no memory for command", hdev->name);
2810 return -ENOMEM;
2811 }
2812
11714b3d
JH		 2813 /* Stand-alone HCI commands must be flaged as
2814 * single-command requests.
2815 */
2816 bt_cb(skb)->req.start = true;
2817
1da177e4 2818 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2819 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2820
2821 return 0;
2822}
1da177e4 2823
71c76a17 2824/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 2825void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2826 const void *param, u8 event)
71c76a17
JH		 2827{
2828 struct hci_dev *hdev = req->hdev;
2829 struct sk_buff *skb;
2830
2831 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2832
34739c1e
AG		 2833 /* If an error occured during request building, there is no point in
2834 * queueing the HCI command. We can simply return.
2835 */
2836 if (req->err)
2837 return;
2838
71c76a17
JH		 2839 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2840 if (!skb) {
5d73e034
AG		 2841 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2842 hdev->name, opcode);
2843 req->err = -ENOMEM;
e348fe6b 2844 return;
71c76a17
JH		 2845 }
2846
2847 if (skb_queue_empty(&req->cmd_q))
2848 bt_cb(skb)->req.start = true;
2849
02350a72
JH		 2850 bt_cb(skb)->req.event = event;
2851
71c76a17 2852 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 2853}
2854
07dc93dd
JH		 2855void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2856 const void *param)
02350a72
JH		 2857{
2858 hci_req_add_ev(req, opcode, plen, param, 0);
2859}
2860
1da177e4 2861/* Get data from the previously sent command */
a9de9248 2862void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2863{
2864 struct hci_command_hdr *hdr;
2865
2866 if (!hdev->sent_cmd)
2867 return NULL;
2868
2869 hdr = (void *) hdev->sent_cmd->data;
2870
a9de9248 2871 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2872 return NULL;
2873
f0e09510 2874 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2875
2876 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2877}
2878
2879/* Send ACL data */
2880static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2881{
2882 struct hci_acl_hdr *hdr;
2883 int len = skb->len;
2884
badff6d0
ACM		 2885 skb_push(skb, HCI_ACL_HDR_SIZE);
2886 skb_reset_transport_header(skb);
9c70220b 2887 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2888 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2889 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2890}
2891
ee22be7e 2892static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2893 struct sk_buff *skb, __u16 flags)
1da177e4 2894{
ee22be7e 2895 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2896 struct hci_dev *hdev = conn->hdev;
2897 struct sk_buff *list;
2898
087bfd99
GP		 2899 skb->len = skb_headlen(skb);
2900 skb->data_len = 0;
2901
2902 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2903
2904 switch (hdev->dev_type) {
2905 case HCI_BREDR:
2906 hci_add_acl_hdr(skb, conn->handle, flags);
2907 break;
2908 case HCI_AMP:
2909 hci_add_acl_hdr(skb, chan->handle, flags);
2910 break;
2911 default:
2912 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2913 return;
2914 }
087bfd99 2915
70f23020
AE		 2916 list = skb_shinfo(skb)->frag_list;
2917 if (!list) {
1da177e4
LT		 2918 /* Non fragmented */
2919 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2920
73d80deb 2921 skb_queue_tail(queue, skb);
1da177e4
LT		 2922 } else {
2923 /* Fragmented */
2924 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2925
2926 skb_shinfo(skb)->frag_list = NULL;
2927
2928 /* Queue all fragments atomically */
af3e6359 2929 spin_lock(&queue->lock);
1da177e4 2930
73d80deb 2931 __skb_queue_tail(queue, skb);
e702112f
AE		 2932
2933 flags &= ~ACL_START;
2934 flags |= ACL_CONT;
1da177e4
LT		 2935 do {
2936 skb = list; list = list->next;
8e87d142 2937
0d48d939 2938 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2939 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2940
2941 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2942
73d80deb 2943 __skb_queue_tail(queue, skb);
1da177e4
LT		 2944 } while (list);
2945
af3e6359 2946 spin_unlock(&queue->lock);
1da177e4 2947 }
73d80deb
LAD		 2948}
2949
2950void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2951{
ee22be7e 2952 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2953
f0e09510 2954 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 2955
ee22be7e 2956 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2957
3eff45ea 2958 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2959}
1da177e4
LT		 2960
2961/* Send SCO data */
0d861d8b 2962void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2963{
2964 struct hci_dev *hdev = conn->hdev;
2965 struct hci_sco_hdr hdr;
2966
2967 BT_DBG("%s len %d", hdev->name, skb->len);
2968
aca3192c 2969 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2970 hdr.dlen = skb->len;
2971
badff6d0
ACM		 2972 skb_push(skb, HCI_SCO_HDR_SIZE);
2973 skb_reset_transport_header(skb);
9c70220b 2974 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 2975
0d48d939 2976 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2977
1da177e4 2978 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2979 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2980}
1da177e4
LT		 2981
2982/* ---- HCI TX task (outgoing data) ---- */
2983
2984/* HCI Connection scheduler */
6039aa73
GP		 2985static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2986 int *quote)
1da177e4
LT		 2987{
2988 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2989 struct hci_conn *conn = NULL, *c;
abc5de8f 2990 unsigned int num = 0, min = ~0;
1da177e4 2991
8e87d142 2992 /* We don't have to lock device here. Connections are always
1da177e4 2993 * added and removed with TX task disabled. */
bf4c6325
GP		 2994
2995 rcu_read_lock();
2996
2997 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2998 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2999 continue;
769be974
MH		 3000
3001 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3002 continue;
3003
1da177e4
LT		 3004 num++;
3005
3006 if (c->sent < min) {
3007 min = c->sent;
3008 conn = c;
3009 }
52087a79
LAD		 3010
3011 if (hci_conn_num(hdev, type) == num)
3012 break;
1da177e4
LT		 3013 }
3014
bf4c6325
GP		 3015 rcu_read_unlock();
3016
1da177e4 3017 if (conn) {
6ed58ec5
VT		 3018 int cnt, q;
3019
3020 switch (conn->type) {
3021 case ACL_LINK:
3022 cnt = hdev->acl_cnt;
3023 break;
3024 case SCO_LINK:
3025 case ESCO_LINK:
3026 cnt = hdev->sco_cnt;
3027 break;
3028 case LE_LINK:
3029 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3030 break;
3031 default:
3032 cnt = 0;
3033 BT_ERR("Unknown link type");
3034 }
3035
3036 q = cnt / num;
1da177e4
LT		 3037 *quote = q ? q : 1;
3038 } else
3039 *quote = 0;
3040
3041 BT_DBG("conn %p quote %d", conn, *quote);
3042 return conn;
3043}
3044
6039aa73 3045static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 3046{
3047 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3048 struct hci_conn *c;
1da177e4 3049
bae1f5d9 3050 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 3051
bf4c6325
GP		 3052 rcu_read_lock();
3053
1da177e4 3054 /* Kill stalled connections */
bf4c6325 3055 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 3056 if (c->type == type && c->sent) {
6ed93dc6
AE		 3057 BT_ERR("%s killing stalled connection %pMR",
3058 hdev->name, &c->dst);
bed71748 3059 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 3060 }
3061 }
bf4c6325
GP		 3062
3063 rcu_read_unlock();
1da177e4
LT		 3064}
3065
6039aa73
GP		 3066static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3067 int *quote)
1da177e4 3068{
73d80deb
LAD		 3069 struct hci_conn_hash *h = &hdev->conn_hash;
3070 struct hci_chan *chan = NULL;
abc5de8f 3071 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 3072 struct hci_conn *conn;
73d80deb
LAD		 3073 int cnt, q, conn_num = 0;
3074
3075 BT_DBG("%s", hdev->name);
3076
bf4c6325
GP		 3077 rcu_read_lock();
3078
3079 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 3080 struct hci_chan *tmp;
3081
3082 if (conn->type != type)
3083 continue;
3084
3085 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3086 continue;
3087
3088 conn_num++;
3089
8192edef 3090 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 3091 struct sk_buff *skb;
3092
3093 if (skb_queue_empty(&tmp->data_q))
3094 continue;
3095
3096 skb = skb_peek(&tmp->data_q);
3097 if (skb->priority < cur_prio)
3098 continue;
3099
3100 if (skb->priority > cur_prio) {
3101 num = 0;
3102 min = ~0;
3103 cur_prio = skb->priority;
3104 }
3105
3106 num++;
3107
3108 if (conn->sent < min) {
3109 min = conn->sent;
3110 chan = tmp;
3111 }
3112 }
3113
3114 if (hci_conn_num(hdev, type) == conn_num)
3115 break;
3116 }
3117
bf4c6325
GP		 3118 rcu_read_unlock();
3119
73d80deb
LAD		 3120 if (!chan)
3121 return NULL;
3122
3123 switch (chan->conn->type) {
3124 case ACL_LINK:
3125 cnt = hdev->acl_cnt;
3126 break;
bd1eb66b
AE		 3127 case AMP_LINK:
3128 cnt = hdev->block_cnt;
3129 break;
73d80deb
LAD		 3130 case SCO_LINK:
3131 case ESCO_LINK:
3132 cnt = hdev->sco_cnt;
3133 break;
3134 case LE_LINK:
3135 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3136 break;
3137 default:
3138 cnt = 0;
3139 BT_ERR("Unknown link type");
3140 }
3141
3142 q = cnt / num;
3143 *quote = q ? q : 1;
3144 BT_DBG("chan %p quote %d", chan, *quote);
3145 return chan;
3146}
3147
02b20f0b
LAD		 3148static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3149{
3150 struct hci_conn_hash *h = &hdev->conn_hash;
3151 struct hci_conn *conn;
3152 int num = 0;
3153
3154 BT_DBG("%s", hdev->name);
3155
bf4c6325
GP		 3156 rcu_read_lock();
3157
3158 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3159 struct hci_chan *chan;
3160
3161 if (conn->type != type)
3162 continue;
3163
3164 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3165 continue;
3166
3167 num++;
3168
8192edef 3169 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3170 struct sk_buff *skb;
3171
3172 if (chan->sent) {
3173 chan->sent = 0;
3174 continue;
3175 }
3176
3177 if (skb_queue_empty(&chan->data_q))
3178 continue;
3179
3180 skb = skb_peek(&chan->data_q);
3181 if (skb->priority >= HCI_PRIO_MAX - 1)
3182 continue;
3183
3184 skb->priority = HCI_PRIO_MAX - 1;
3185
3186 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3187 skb->priority);
02b20f0b
LAD		 3188 }
3189
3190 if (hci_conn_num(hdev, type) == num)
3191 break;
3192 }
bf4c6325
GP		 3193
3194 rcu_read_unlock();
3195
02b20f0b
LAD		 3196}
3197
b71d385a
AE		 3198static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3199{
3200 /* Calculate count of blocks used by this packet */
3201 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3202}
3203
6039aa73 3204static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3205{
1da177e4
LT		 3206 if (!test_bit(HCI_RAW, &hdev->flags)) {
3207 /* ACL tx timeout must be longer than maximum
3208 * link supervision timeout (40.9 seconds) */
63d2bc1b 3209 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3210 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3211 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3212 }
63d2bc1b 3213}
1da177e4 3214
6039aa73 3215static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3216{
3217 unsigned int cnt = hdev->acl_cnt;
3218 struct hci_chan *chan;
3219 struct sk_buff *skb;
3220 int quote;
3221
3222 __check_timeout(hdev, cnt);
04837f64 3223
73d80deb 3224 while (hdev->acl_cnt &&
a8c5fb1a 3225 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3226 u32 priority = (skb_peek(&chan->data_q))->priority;
3227 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3228 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3229 skb->len, skb->priority);
73d80deb 3230
ec1cce24
LAD		 3231 /* Stop if priority has changed */
3232 if (skb->priority < priority)
3233 break;
3234
3235 skb = skb_dequeue(&chan->data_q);
3236
73d80deb 3237 hci_conn_enter_active_mode(chan->conn,
04124681 3238 bt_cb(skb)->force_active);
04837f64 3239
57d17d70 3240 hci_send_frame(hdev, skb);
1da177e4
LT		 3241 hdev->acl_last_tx = jiffies;
3242
3243 hdev->acl_cnt--;
73d80deb
LAD		 3244 chan->sent++;
3245 chan->conn->sent++;
1da177e4
LT		 3246 }
3247 }
02b20f0b
LAD		 3248
3249 if (cnt != hdev->acl_cnt)
3250 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3251}
3252
6039aa73 3253static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3254{
63d2bc1b 3255 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3256 struct hci_chan *chan;
3257 struct sk_buff *skb;
3258 int quote;
bd1eb66b 3259 u8 type;
b71d385a 3260
63d2bc1b 3261 __check_timeout(hdev, cnt);
b71d385a 3262
bd1eb66b
AE		 3263 BT_DBG("%s", hdev->name);
3264
3265 if (hdev->dev_type == HCI_AMP)
3266 type = AMP_LINK;
3267 else
3268 type = ACL_LINK;
3269
b71d385a 3270 while (hdev->block_cnt > 0 &&
bd1eb66b 3271 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3272 u32 priority = (skb_peek(&chan->data_q))->priority;
3273 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3274 int blocks;
3275
3276 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3277 skb->len, skb->priority);
b71d385a
AE		 3278
3279 /* Stop if priority has changed */
3280 if (skb->priority < priority)
3281 break;
3282
3283 skb = skb_dequeue(&chan->data_q);
3284
3285 blocks = __get_blocks(hdev, skb);
3286 if (blocks > hdev->block_cnt)
3287 return;
3288
3289 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3290 bt_cb(skb)->force_active);
b71d385a 3291
57d17d70 3292 hci_send_frame(hdev, skb);
b71d385a
AE		 3293 hdev->acl_last_tx = jiffies;
3294
3295 hdev->block_cnt -= blocks;
3296 quote -= blocks;
3297
3298 chan->sent += blocks;
3299 chan->conn->sent += blocks;
3300 }
3301 }
3302
3303 if (cnt != hdev->block_cnt)
bd1eb66b 3304 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3305}
3306
6039aa73 3307static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3308{
3309 BT_DBG("%s", hdev->name);
3310
bd1eb66b
AE		 3311 /* No ACL link over BR/EDR controller */
3312 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3313 return;
3314
3315 /* No AMP link over AMP controller */
3316 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3317 return;
3318
3319 switch (hdev->flow_ctl_mode) {
3320 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3321 hci_sched_acl_pkt(hdev);
3322 break;
3323
3324 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3325 hci_sched_acl_blk(hdev);
3326 break;
3327 }
3328}
3329
1da177e4 3330/* Schedule SCO */
6039aa73 3331static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3332{
3333 struct hci_conn *conn;
3334 struct sk_buff *skb;
3335 int quote;
3336
3337 BT_DBG("%s", hdev->name);
3338
52087a79
LAD		 3339 if (!hci_conn_num(hdev, SCO_LINK))
3340 return;
3341
1da177e4
LT		 3342 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3343 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3344 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3345 hci_send_frame(hdev, skb);
1da177e4
LT		 3346
3347 conn->sent++;
3348 if (conn->sent == ~0)
3349 conn->sent = 0;
3350 }
3351 }
3352}
3353
6039aa73 3354static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3355{
3356 struct hci_conn *conn;
3357 struct sk_buff *skb;
3358 int quote;
3359
3360 BT_DBG("%s", hdev->name);
3361
52087a79
LAD		 3362 if (!hci_conn_num(hdev, ESCO_LINK))
3363 return;
3364
8fc9ced3
GP		 3365 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3366 &quote))) {
b6a0dc82
MH		 3367 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3368 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3369 hci_send_frame(hdev, skb);
b6a0dc82
MH		 3370
3371 conn->sent++;
3372 if (conn->sent == ~0)
3373 conn->sent = 0;
3374 }
3375 }
3376}
3377
6039aa73 3378static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3379{
73d80deb 3380 struct hci_chan *chan;
6ed58ec5 3381 struct sk_buff *skb;
02b20f0b 3382 int quote, cnt, tmp;
6ed58ec5
VT		 3383
3384 BT_DBG("%s", hdev->name);
3385
52087a79
LAD		 3386 if (!hci_conn_num(hdev, LE_LINK))
3387 return;
3388
6ed58ec5
VT		 3389 if (!test_bit(HCI_RAW, &hdev->flags)) {
3390 /* LE tx timeout must be longer than maximum
3391 * link supervision timeout (40.9 seconds) */
bae1f5d9 3392 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3393 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3394 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3395 }
3396
3397 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3398 tmp = cnt;
73d80deb 3399 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3400 u32 priority = (skb_peek(&chan->data_q))->priority;
3401 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3402 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3403 skb->len, skb->priority);
6ed58ec5 3404
ec1cce24
LAD		 3405 /* Stop if priority has changed */
3406 if (skb->priority < priority)
3407 break;
3408
3409 skb = skb_dequeue(&chan->data_q);
3410
57d17d70 3411 hci_send_frame(hdev, skb);
6ed58ec5
VT		 3412 hdev->le_last_tx = jiffies;
3413
3414 cnt--;
73d80deb
LAD		 3415 chan->sent++;
3416 chan->conn->sent++;
6ed58ec5
VT		 3417 }
3418 }
73d80deb 3419
6ed58ec5
VT		 3420 if (hdev->le_pkts)
3421 hdev->le_cnt = cnt;
3422 else
3423 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3424
3425 if (cnt != tmp)
3426 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3427}
3428
3eff45ea 3429static void hci_tx_work(struct work_struct *work)
1da177e4 3430{
3eff45ea 3431 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3432 struct sk_buff *skb;
3433
6ed58ec5 3434 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3435 hdev->sco_cnt, hdev->le_cnt);
1da177e4 3436
52de599e
MH		 3437 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
3438 /* Schedule queues and send stuff to HCI driver */
3439 hci_sched_acl(hdev);
3440 hci_sched_sco(hdev);
3441 hci_sched_esco(hdev);
3442 hci_sched_le(hdev);
3443 }
6ed58ec5 3444
1da177e4
LT		 3445 /* Send next queued raw (unknown type) packet */
3446 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 3447 hci_send_frame(hdev, skb);
1da177e4
LT		 3448}
3449
25985edc 3450/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3451
3452/* ACL data packet */
6039aa73 3453static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3454{
3455 struct hci_acl_hdr *hdr = (void *) skb->data;
3456 struct hci_conn *conn;
3457 __u16 handle, flags;
3458
3459 skb_pull(skb, HCI_ACL_HDR_SIZE);
3460
3461 handle = __le16_to_cpu(hdr->handle);
3462 flags = hci_flags(handle);
3463 handle = hci_handle(handle);
3464
f0e09510 3465 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3466 handle, flags);
1da177e4
LT		 3467
3468 hdev->stat.acl_rx++;
3469
3470 hci_dev_lock(hdev);
3471 conn = hci_conn_hash_lookup_handle(hdev, handle);
3472 hci_dev_unlock(hdev);
8e87d142 3473
1da177e4 3474 if (conn) {
65983fc7 3475 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3476
1da177e4 3477 /* Send to upper protocol */
686ebf28
UF		 3478 l2cap_recv_acldata(conn, skb, flags);
3479 return;
1da177e4 3480 } else {
8e87d142 3481 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3482 hdev->name, handle);
1da177e4
LT		 3483 }
3484
3485 kfree_skb(skb);
3486}
3487
3488/* SCO data packet */
6039aa73 3489static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3490{
3491 struct hci_sco_hdr *hdr = (void *) skb->data;
3492 struct hci_conn *conn;
3493 __u16 handle;
3494
3495 skb_pull(skb, HCI_SCO_HDR_SIZE);
3496
3497 handle = __le16_to_cpu(hdr->handle);
3498
f0e09510 3499 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3500
3501 hdev->stat.sco_rx++;
3502
3503 hci_dev_lock(hdev);
3504 conn = hci_conn_hash_lookup_handle(hdev, handle);
3505 hci_dev_unlock(hdev);
3506
3507 if (conn) {
1da177e4 3508 /* Send to upper protocol */
686ebf28
UF		 3509 sco_recv_scodata(conn, skb);
3510 return;
1da177e4 3511 } else {
8e87d142 3512 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3513 hdev->name, handle);
1da177e4
LT		 3514 }
3515
3516 kfree_skb(skb);
3517}
3518
9238f36a
JH		 3519static bool hci_req_is_complete(struct hci_dev *hdev)
3520{
3521 struct sk_buff *skb;
3522
3523 skb = skb_peek(&hdev->cmd_q);
3524 if (!skb)
3525 return true;
3526
3527 return bt_cb(skb)->req.start;
3528}
3529
42c6b129
JH		 3530static void hci_resend_last(struct hci_dev *hdev)
3531{
3532 struct hci_command_hdr *sent;
3533 struct sk_buff *skb;
3534 u16 opcode;
3535
3536 if (!hdev->sent_cmd)
3537 return;
3538
3539 sent = (void *) hdev->sent_cmd->data;
3540 opcode = __le16_to_cpu(sent->opcode);
3541 if (opcode == HCI_OP_RESET)
3542 return;
3543
3544 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3545 if (!skb)
3546 return;
3547
3548 skb_queue_head(&hdev->cmd_q, skb);
3549 queue_work(hdev->workqueue, &hdev->cmd_work);
3550}
3551
9238f36a
JH		 3552void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3553{
3554 hci_req_complete_t req_complete = NULL;
3555 struct sk_buff *skb;
3556 unsigned long flags;
3557
3558 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3559
42c6b129
JH		 3560 /* If the completed command doesn't match the last one that was
3561 * sent we need to do special handling of it.
9238f36a 3562 */
42c6b129
JH		 3563 if (!hci_sent_cmd_data(hdev, opcode)) {
3564 /* Some CSR based controllers generate a spontaneous
3565 * reset complete event during init and any pending
3566 * command will never be completed. In such a case we
3567 * need to resend whatever was the last sent
3568 * command.
3569 */
3570 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3571 hci_resend_last(hdev);
3572
9238f36a 3573 return;
42c6b129 3574 }
9238f36a
JH		 3575
3576 /* If the command succeeded and there's still more commands in
3577 * this request the request is not yet complete.
3578 */
3579 if (!status && !hci_req_is_complete(hdev))
3580 return;
3581
3582 /* If this was the last command in a request the complete
3583 * callback would be found in hdev->sent_cmd instead of the
3584 * command queue (hdev->cmd_q).
3585 */
3586 if (hdev->sent_cmd) {
3587 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 3588
3589 if (req_complete) {
3590 /* We must set the complete callback to NULL to
3591 * avoid calling the callback more than once if
3592 * this function gets called again.
3593 */
3594 bt_cb(hdev->sent_cmd)->req.complete = NULL;
3595
9238f36a 3596 goto call_complete;
53e21fbc 3597 }
9238f36a
JH		 3598 }
3599
3600 /* Remove all pending commands belonging to this request */
3601 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3602 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3603 if (bt_cb(skb)->req.start) {
3604 __skb_queue_head(&hdev->cmd_q, skb);
3605 break;
3606 }
3607
3608 req_complete = bt_cb(skb)->req.complete;
3609 kfree_skb(skb);
3610 }
3611 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3612
3613call_complete:
3614 if (req_complete)
3615 req_complete(hdev, status);
3616}
3617
b78752cc 3618static void hci_rx_work(struct work_struct *work)
1da177e4 3619{
b78752cc 3620 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3621 struct sk_buff *skb;
3622
3623 BT_DBG("%s", hdev->name);
3624
1da177e4 3625 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3626 /* Send copy to monitor */
3627 hci_send_to_monitor(hdev, skb);
3628
1da177e4
LT		 3629 if (atomic_read(&hdev->promisc)) {
3630 /* Send copy to the sockets */
470fe1b5 3631 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3632 }
3633
0736cfa8
MH		 3634 if (test_bit(HCI_RAW, &hdev->flags) ||
3635 test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1da177e4
LT		 3636 kfree_skb(skb);
3637 continue;
3638 }
3639
3640 if (test_bit(HCI_INIT, &hdev->flags)) {
3641 /* Don't process data packets in this states. */
0d48d939 3642 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3643 case HCI_ACLDATA_PKT:
3644 case HCI_SCODATA_PKT:
3645 kfree_skb(skb);
3646 continue;
3ff50b79 3647 }
1da177e4
LT		 3648 }
3649
3650 /* Process frame */
0d48d939 3651 switch (bt_cb(skb)->pkt_type) {
1da177e4 3652 case HCI_EVENT_PKT:
b78752cc 3653 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3654 hci_event_packet(hdev, skb);
3655 break;
3656
3657 case HCI_ACLDATA_PKT:
3658 BT_DBG("%s ACL data packet", hdev->name);
3659 hci_acldata_packet(hdev, skb);
3660 break;
3661
3662 case HCI_SCODATA_PKT:
3663 BT_DBG("%s SCO data packet", hdev->name);
3664 hci_scodata_packet(hdev, skb);
3665 break;
3666
3667 default:
3668 kfree_skb(skb);
3669 break;
3670 }
3671 }
1da177e4
LT		 3672}
3673
c347b765 3674static void hci_cmd_work(struct work_struct *work)
1da177e4 3675{
c347b765 3676 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3677 struct sk_buff *skb;
3678
2104786b
AE		 3679 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3680 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3681
1da177e4 3682 /* Send queued commands */
5a08ecce
AE		 3683 if (atomic_read(&hdev->cmd_cnt)) {
3684 skb = skb_dequeue(&hdev->cmd_q);
3685 if (!skb)
3686 return;
3687
7585b97a 3688 kfree_skb(hdev->sent_cmd);
1da177e4 3689
a675d7f1 3690 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 3691 if (hdev->sent_cmd) {
1da177e4 3692 atomic_dec(&hdev->cmd_cnt);
57d17d70 3693 hci_send_frame(hdev, skb);
7bdb8a5c
SJ		 3694 if (test_bit(HCI_RESET, &hdev->flags))
3695 del_timer(&hdev->cmd_timer);
3696 else
3697 mod_timer(&hdev->cmd_timer,
5f246e89 3698 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3699 } else {
3700 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3701 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3702 }
3703 }
3704}
Linux kernel - Deliverables
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