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Bluetooth: Declare ath3k_table[] and ath3k_blist_tbl[] as const
[linux-block.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{
2177bab5
JH		 356 __le16 param;
357 __u8 flt_type;
358
359 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 360 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 361
362 /* Read Class of Device */
42c6b129 363 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 364
365 /* Read Local Name */
42c6b129 366 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 367
368 /* Read Voice Setting */
42c6b129 369 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5
JH		 370
371 /* Clear Event Filters */
372 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 373 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 374
375 /* Connection accept timeout ~20 secs */
376 param = __constant_cpu_to_le16(0x7d00);
42c6b129 377 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 378
f332ec66
JH		 379 /* Read page scan parameters */
380 if (req->hdev->hci_ver > BLUETOOTH_VER_1_1) {
381 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
382 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
383 }
2177bab5
JH		 384}
385
42c6b129 386static void le_setup(struct hci_request *req)
2177bab5 387{
c73eee91
JH		 388 struct hci_dev *hdev = req->hdev;
389
2177bab5 390 /* Read LE Buffer Size */
42c6b129 391 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 392
393 /* Read LE Local Supported Features */
42c6b129 394 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5
JH		 395
396 /* Read LE Advertising Channel TX Power */
42c6b129 397 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH		 398
399 /* Read LE White List Size */
42c6b129 400 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5
JH		 401
402 /* Read LE Supported States */
42c6b129 403 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
c73eee91
JH		 404
405 /* LE-only controllers have LE implicitly enabled */
406 if (!lmp_bredr_capable(hdev))
407 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 408}
409
410static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
411{
412 if (lmp_ext_inq_capable(hdev))
413 return 0x02;
414
415 if (lmp_inq_rssi_capable(hdev))
416 return 0x01;
417
418 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
419 hdev->lmp_subver == 0x0757)
420 return 0x01;
421
422 if (hdev->manufacturer == 15) {
423 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
424 return 0x01;
425 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
426 return 0x01;
427 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
428 return 0x01;
429 }
430
431 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
432 hdev->lmp_subver == 0x1805)
433 return 0x01;
434
435 return 0x00;
436}
437
42c6b129 438static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 439{
440 u8 mode;
441
42c6b129 442 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 443
42c6b129 444 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 445}
446
42c6b129 447static void hci_setup_event_mask(struct hci_request *req)
2177bab5 448{
42c6b129
JH		 449 struct hci_dev *hdev = req->hdev;
450
2177bab5
JH		 451 /* The second byte is 0xff instead of 0x9f (two reserved bits
452 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
453 * command otherwise.
454 */
455 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
456
457 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
458 * any event mask for pre 1.2 devices.
459 */
460 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
461 return;
462
463 if (lmp_bredr_capable(hdev)) {
464 events[4] |= 0x01; /* Flow Specification Complete */
465 events[4] |= 0x02; /* Inquiry Result with RSSI */
466 events[4] |= 0x04; /* Read Remote Extended Features Complete */
467 events[5] |= 0x08; /* Synchronous Connection Complete */
468 events[5] |= 0x10; /* Synchronous Connection Changed */
c7882cbd
MH		 469 } else {
470 /* Use a different default for LE-only devices */
471 memset(events, 0, sizeof(events));
472 events[0] |= 0x10; /* Disconnection Complete */
473 events[0] |= 0x80; /* Encryption Change */
474 events[1] |= 0x08; /* Read Remote Version Information Complete */
475 events[1] |= 0x20; /* Command Complete */
476 events[1] |= 0x40; /* Command Status */
477 events[1] |= 0x80; /* Hardware Error */
478 events[2] |= 0x04; /* Number of Completed Packets */
479 events[3] |= 0x02; /* Data Buffer Overflow */
480 events[5] |= 0x80; /* Encryption Key Refresh Complete */
2177bab5
JH		 481 }
482
483 if (lmp_inq_rssi_capable(hdev))
484 events[4] |= 0x02; /* Inquiry Result with RSSI */
485
486 if (lmp_sniffsubr_capable(hdev))
487 events[5] |= 0x20; /* Sniff Subrating */
488
489 if (lmp_pause_enc_capable(hdev))
490 events[5] |= 0x80; /* Encryption Key Refresh Complete */
491
492 if (lmp_ext_inq_capable(hdev))
493 events[5] |= 0x40; /* Extended Inquiry Result */
494
495 if (lmp_no_flush_capable(hdev))
496 events[7] |= 0x01; /* Enhanced Flush Complete */
497
498 if (lmp_lsto_capable(hdev))
499 events[6] |= 0x80; /* Link Supervision Timeout Changed */
500
501 if (lmp_ssp_capable(hdev)) {
502 events[6] |= 0x01; /* IO Capability Request */
503 events[6] |= 0x02; /* IO Capability Response */
504 events[6] |= 0x04; /* User Confirmation Request */
505 events[6] |= 0x08; /* User Passkey Request */
506 events[6] |= 0x10; /* Remote OOB Data Request */
507 events[6] |= 0x20; /* Simple Pairing Complete */
508 events[7] |= 0x04; /* User Passkey Notification */
509 events[7] |= 0x08; /* Keypress Notification */
510 events[7] |= 0x10; /* Remote Host Supported
511 * Features Notification
512 */
513 }
514
515 if (lmp_le_capable(hdev))
516 events[7] |= 0x20; /* LE Meta-Event */
517
42c6b129 518 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 519
520 if (lmp_le_capable(hdev)) {
521 memset(events, 0, sizeof(events));
522 events[0] = 0x1f;
42c6b129
JH		 523 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
524 sizeof(events), events);
2177bab5
JH		 525 }
526}
527
42c6b129 528static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 529{
42c6b129
JH		 530 struct hci_dev *hdev = req->hdev;
531
2177bab5 532 if (lmp_bredr_capable(hdev))
42c6b129 533 bredr_setup(req);
56f87901
JH		 534 else
535 clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2177bab5
JH		 536
537 if (lmp_le_capable(hdev))
42c6b129 538 le_setup(req);
2177bab5 539
42c6b129 540 hci_setup_event_mask(req);
2177bab5 541
3f8e2d75
JH		 542 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
543 * local supported commands HCI command.
544 */
545 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 546 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 547
548 if (lmp_ssp_capable(hdev)) {
549 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
550 u8 mode = 0x01;
42c6b129
JH		 551 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
552 sizeof(mode), &mode);
2177bab5
JH		 553 } else {
554 struct hci_cp_write_eir cp;
555
556 memset(hdev->eir, 0, sizeof(hdev->eir));
557 memset(&cp, 0, sizeof(cp));
558
42c6b129 559 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 560 }
561 }
562
563 if (lmp_inq_rssi_capable(hdev))
42c6b129 564 hci_setup_inquiry_mode(req);
2177bab5
JH		 565
566 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 567 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 568
569 if (lmp_ext_feat_capable(hdev)) {
570 struct hci_cp_read_local_ext_features cp;
571
572 cp.page = 0x01;
42c6b129
JH		 573 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
574 sizeof(cp), &cp);
2177bab5
JH		 575 }
576
577 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
578 u8 enable = 1;
42c6b129
JH		 579 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
580 &enable);
2177bab5
JH		 581 }
582}
583
42c6b129 584static void hci_setup_link_policy(struct hci_request *req)
2177bab5 585{
42c6b129 586 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 587 struct hci_cp_write_def_link_policy cp;
588 u16 link_policy = 0;
589
590 if (lmp_rswitch_capable(hdev))
591 link_policy |= HCI_LP_RSWITCH;
592 if (lmp_hold_capable(hdev))
593 link_policy |= HCI_LP_HOLD;
594 if (lmp_sniff_capable(hdev))
595 link_policy |= HCI_LP_SNIFF;
596 if (lmp_park_capable(hdev))
597 link_policy |= HCI_LP_PARK;
598
599 cp.policy = cpu_to_le16(link_policy);
42c6b129 600 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 601}
602
42c6b129 603static void hci_set_le_support(struct hci_request *req)
2177bab5 604{
42c6b129 605 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 606 struct hci_cp_write_le_host_supported cp;
607
c73eee91
JH		 608 /* LE-only devices do not support explicit enablement */
609 if (!lmp_bredr_capable(hdev))
610 return;
611
2177bab5
JH		 612 memset(&cp, 0, sizeof(cp));
613
614 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
615 cp.le = 0x01;
616 cp.simul = lmp_le_br_capable(hdev);
617 }
618
619 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 620 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
621 &cp);
2177bab5
JH		 622}
623
d62e6d67
JH		 624static void hci_set_event_mask_page_2(struct hci_request *req)
625{
626 struct hci_dev *hdev = req->hdev;
627 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
628
629 /* If Connectionless Slave Broadcast master role is supported
630 * enable all necessary events for it.
631 */
632 if (hdev->features[2][0] & 0x01) {
633 events[1] |= 0x40; /* Triggered Clock Capture */
634 events[1] |= 0x80; /* Synchronization Train Complete */
635 events[2] |= 0x10; /* Slave Page Response Timeout */
636 events[2] |= 0x20; /* CSB Channel Map Change */
637 }
638
639 /* If Connectionless Slave Broadcast slave role is supported
640 * enable all necessary events for it.
641 */
642 if (hdev->features[2][0] & 0x02) {
643 events[2] |= 0x01; /* Synchronization Train Received */
644 events[2] |= 0x02; /* CSB Receive */
645 events[2] |= 0x04; /* CSB Timeout */
646 events[2] |= 0x08; /* Truncated Page Complete */
647 }
648
649 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
650}
651
42c6b129 652static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 653{
42c6b129 654 struct hci_dev *hdev = req->hdev;
d2c5d77f 655 u8 p;
42c6b129 656
b8f4e068
GP		 657 /* Some Broadcom based Bluetooth controllers do not support the
658 * Delete Stored Link Key command. They are clearly indicating its
659 * absence in the bit mask of supported commands.
660 *
661 * Check the supported commands and only if the the command is marked
662 * as supported send it. If not supported assume that the controller
663 * does not have actual support for stored link keys which makes this
664 * command redundant anyway.
637b4cae 665 */
59f45d57
JH		 666 if (hdev->commands[6] & 0x80) {
667 struct hci_cp_delete_stored_link_key cp;
668
669 bacpy(&cp.bdaddr, BDADDR_ANY);
670 cp.delete_all = 0x01;
671 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
672 sizeof(cp), &cp);
673 }
674
2177bab5 675 if (hdev->commands[5] & 0x10)
42c6b129 676 hci_setup_link_policy(req);
2177bab5 677
04b4edcb 678 if (lmp_le_capable(hdev)) {
42c6b129 679 hci_set_le_support(req);
04b4edcb
JH		 680 hci_update_ad(req);
681 }
d2c5d77f
JH		 682
683 /* Read features beyond page 1 if available */
684 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
685 struct hci_cp_read_local_ext_features cp;
686
687 cp.page = p;
688 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
689 sizeof(cp), &cp);
690 }
2177bab5
JH		 691}
692
5d4e7e8d
JH		 693static void hci_init4_req(struct hci_request *req, unsigned long opt)
694{
695 struct hci_dev *hdev = req->hdev;
696
d62e6d67
JH		 697 /* Set event mask page 2 if the HCI command for it is supported */
698 if (hdev->commands[22] & 0x04)
699 hci_set_event_mask_page_2(req);
700
5d4e7e8d
JH		 701 /* Check for Synchronization Train support */
702 if (hdev->features[2][0] & 0x04)
703 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
704}
705
2177bab5
JH		 706static int __hci_init(struct hci_dev *hdev)
707{
708 int err;
709
710 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
711 if (err < 0)
712 return err;
713
714 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
715 * BR/EDR/LE type controllers. AMP controllers only need the
716 * first stage init.
717 */
718 if (hdev->dev_type != HCI_BREDR)
719 return 0;
720
721 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
722 if (err < 0)
723 return err;
724
5d4e7e8d
JH		 725 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
726 if (err < 0)
727 return err;
728
729 return __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
2177bab5
JH		 730}
731
42c6b129 732static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 733{
734 __u8 scan = opt;
735
42c6b129 736 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 737
738 /* Inquiry and Page scans */
42c6b129 739 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 740}
741
42c6b129 742static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 743{
744 __u8 auth = opt;
745
42c6b129 746 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 747
748 /* Authentication */
42c6b129 749 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 750}
751
42c6b129 752static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 753{
754 __u8 encrypt = opt;
755
42c6b129 756 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 757
e4e8e37c 758 /* Encryption */
42c6b129 759 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 760}
761
42c6b129 762static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 763{
764 __le16 policy = cpu_to_le16(opt);
765
42c6b129 766 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 767
768 /* Default link policy */
42c6b129 769 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 770}
771
8e87d142 772/* Get HCI device by index.
1da177e4
LT		 773 * Device is held on return. */
774struct hci_dev *hci_dev_get(int index)
775{
8035ded4 776 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 777
778 BT_DBG("%d", index);
779
780 if (index < 0)
781 return NULL;
782
783 read_lock(&hci_dev_list_lock);
8035ded4 784 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 785 if (d->id == index) {
786 hdev = hci_dev_hold(d);
787 break;
788 }
789 }
790 read_unlock(&hci_dev_list_lock);
791 return hdev;
792}
1da177e4
LT		 793
794/* ---- Inquiry support ---- */
ff9ef578 795
30dc78e1
JH		 796bool hci_discovery_active(struct hci_dev *hdev)
797{
798 struct discovery_state *discov = &hdev->discovery;
799
6fbe195d 800 switch (discov->state) {
343f935b 801 case DISCOVERY_FINDING:
6fbe195d 802 case DISCOVERY_RESOLVING:
30dc78e1
JH		 803 return true;
804
6fbe195d
AG		 805 default:
806 return false;
807 }
30dc78e1
JH		 808}
809
ff9ef578
JH		 810void hci_discovery_set_state(struct hci_dev *hdev, int state)
811{
812 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
813
814 if (hdev->discovery.state == state)
815 return;
816
817 switch (state) {
818 case DISCOVERY_STOPPED:
7b99b659
AG		 819 if (hdev->discovery.state != DISCOVERY_STARTING)
820 mgmt_discovering(hdev, 0);
ff9ef578
JH		 821 break;
822 case DISCOVERY_STARTING:
823 break;
343f935b 824 case DISCOVERY_FINDING:
ff9ef578
JH		 825 mgmt_discovering(hdev, 1);
826 break;
30dc78e1
JH		 827 case DISCOVERY_RESOLVING:
828 break;
ff9ef578
JH		 829 case DISCOVERY_STOPPING:
830 break;
831 }
832
833 hdev->discovery.state = state;
834}
835
1f9b9a5d 836void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 837{
30883512 838 struct discovery_state *cache = &hdev->discovery;
b57c1a56 839 struct inquiry_entry *p, *n;
1da177e4 840
561aafbc
JH		 841 list_for_each_entry_safe(p, n, &cache->all, all) {
842 list_del(&p->all);
b57c1a56 843 kfree(p);
1da177e4 844 }
561aafbc
JH		 845
846 INIT_LIST_HEAD(&cache->unknown);
847 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 848}
849
a8c5fb1a
GP		 850struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
851 bdaddr_t *bdaddr)
1da177e4 852{
30883512 853 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 854 struct inquiry_entry *e;
855
6ed93dc6 856 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 857
561aafbc
JH		 858 list_for_each_entry(e, &cache->all, all) {
859 if (!bacmp(&e->data.bdaddr, bdaddr))
860 return e;
861 }
862
863 return NULL;
864}
865
866struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 867 bdaddr_t *bdaddr)
561aafbc 868{
30883512 869 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 870 struct inquiry_entry *e;
871
6ed93dc6 872 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 873
874 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 875 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 876 return e;
877 }
878
879 return NULL;
1da177e4
LT		 880}
881
30dc78e1 882struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 883 bdaddr_t *bdaddr,
884 int state)
30dc78e1
JH		 885{
886 struct discovery_state *cache = &hdev->discovery;
887 struct inquiry_entry *e;
888
6ed93dc6 889 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 890
891 list_for_each_entry(e, &cache->resolve, list) {
892 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
893 return e;
894 if (!bacmp(&e->data.bdaddr, bdaddr))
895 return e;
896 }
897
898 return NULL;
899}
900
a3d4e20a 901void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 902 struct inquiry_entry *ie)
a3d4e20a
JH		 903{
904 struct discovery_state *cache = &hdev->discovery;
905 struct list_head *pos = &cache->resolve;
906 struct inquiry_entry *p;
907
908 list_del(&ie->list);
909
910 list_for_each_entry(p, &cache->resolve, list) {
911 if (p->name_state != NAME_PENDING &&
a8c5fb1a 912 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 913 break;
914 pos = &p->list;
915 }
916
917 list_add(&ie->list, pos);
918}
919
3175405b 920bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 921 bool name_known, bool *ssp)
1da177e4 922{
30883512 923 struct discovery_state *cache = &hdev->discovery;
70f23020 924 struct inquiry_entry *ie;
1da177e4 925
6ed93dc6 926 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 927
2b2fec4d
SJ		 928 hci_remove_remote_oob_data(hdev, &data->bdaddr);
929
388fc8fa
JH		 930 if (ssp)
931 *ssp = data->ssp_mode;
932
70f23020 933 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 934 if (ie) {
388fc8fa
JH		 935 if (ie->data.ssp_mode && ssp)
936 *ssp = true;
937
a3d4e20a 938 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 939 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 940 ie->data.rssi = data->rssi;
941 hci_inquiry_cache_update_resolve(hdev, ie);
942 }
943
561aafbc 944 goto update;
a3d4e20a 945 }
561aafbc
JH		 946
947 /* Entry not in the cache. Add new one. */
948 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
949 if (!ie)
3175405b 950 return false;
561aafbc
JH		 951
952 list_add(&ie->all, &cache->all);
953
954 if (name_known) {
955 ie->name_state = NAME_KNOWN;
956 } else {
957 ie->name_state = NAME_NOT_KNOWN;
958 list_add(&ie->list, &cache->unknown);
959 }
70f23020 960
561aafbc
JH		 961update:
962 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 963 ie->name_state != NAME_PENDING) {
561aafbc
JH		 964 ie->name_state = NAME_KNOWN;
965 list_del(&ie->list);
1da177e4
LT		 966 }
967
70f23020
AE		 968 memcpy(&ie->data, data, sizeof(*data));
969 ie->timestamp = jiffies;
1da177e4 970 cache->timestamp = jiffies;
3175405b
JH		 971
972 if (ie->name_state == NAME_NOT_KNOWN)
973 return false;
974
975 return true;
1da177e4
LT		 976}
977
978static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
979{
30883512 980 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 981 struct inquiry_info *info = (struct inquiry_info *) buf;
982 struct inquiry_entry *e;
983 int copied = 0;
984
561aafbc 985 list_for_each_entry(e, &cache->all, all) {
1da177e4 986 struct inquiry_data *data = &e->data;
b57c1a56
JH		 987
988 if (copied >= num)
989 break;
990
1da177e4
LT		 991 bacpy(&info->bdaddr, &data->bdaddr);
992 info->pscan_rep_mode = data->pscan_rep_mode;
993 info->pscan_period_mode = data->pscan_period_mode;
994 info->pscan_mode = data->pscan_mode;
995 memcpy(info->dev_class, data->dev_class, 3);
996 info->clock_offset = data->clock_offset;
b57c1a56 997
1da177e4 998 info++;
b57c1a56 999 copied++;
1da177e4
LT		 1000 }
1001
1002 BT_DBG("cache %p, copied %d", cache, copied);
1003 return copied;
1004}
1005
42c6b129 1006static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1007{
1008 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 1009 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 1010 struct hci_cp_inquiry cp;
1011
1012 BT_DBG("%s", hdev->name);
1013
1014 if (test_bit(HCI_INQUIRY, &hdev->flags))
1015 return;
1016
1017 /* Start Inquiry */
1018 memcpy(&cp.lap, &ir->lap, 3);
1019 cp.length = ir->length;
1020 cp.num_rsp = ir->num_rsp;
42c6b129 1021 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 1022}
1023
3e13fa1e
AG		 1024static int wait_inquiry(void *word)
1025{
1026 schedule();
1027 return signal_pending(current);
1028}
1029
1da177e4
LT		 1030int hci_inquiry(void __user *arg)
1031{
1032 __u8 __user *ptr = arg;
1033 struct hci_inquiry_req ir;
1034 struct hci_dev *hdev;
1035 int err = 0, do_inquiry = 0, max_rsp;
1036 long timeo;
1037 __u8 *buf;
1038
1039 if (copy_from_user(&ir, ptr, sizeof(ir)))
1040 return -EFAULT;
1041
5a08ecce
AE		 1042 hdev = hci_dev_get(ir.dev_id);
1043 if (!hdev)
1da177e4
LT		 1044 return -ENODEV;
1045
0736cfa8
MH		 1046 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1047 err = -EBUSY;
1048 goto done;
1049 }
1050
5b69bef5
MH		 1051 if (hdev->dev_type != HCI_BREDR) {
1052 err = -EOPNOTSUPP;
1053 goto done;
1054 }
1055
56f87901
JH		 1056 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1057 err = -EOPNOTSUPP;
1058 goto done;
1059 }
1060
09fd0de5 1061 hci_dev_lock(hdev);
8e87d142 1062 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 1063 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 1064 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 1065 do_inquiry = 1;
1066 }
09fd0de5 1067 hci_dev_unlock(hdev);
1da177e4 1068
04837f64 1069 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 1070
1071 if (do_inquiry) {
01178cd4
JH		 1072 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1073 timeo);
70f23020
AE		 1074 if (err < 0)
1075 goto done;
3e13fa1e
AG		 1076
1077 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1078 * cleared). If it is interrupted by a signal, return -EINTR.
1079 */
1080 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
1081 TASK_INTERRUPTIBLE))
1082 return -EINTR;
70f23020 1083 }
1da177e4 1084
8fc9ced3
GP		 1085 /* for unlimited number of responses we will use buffer with
1086 * 255 entries
1087 */
1da177e4
LT		 1088 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1089
1090 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1091 * copy it to the user space.
1092 */
01df8c31 1093 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1094 if (!buf) {
1da177e4
LT		 1095 err = -ENOMEM;
1096 goto done;
1097 }
1098
09fd0de5 1099 hci_dev_lock(hdev);
1da177e4 1100 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1101 hci_dev_unlock(hdev);
1da177e4
LT		 1102
1103 BT_DBG("num_rsp %d", ir.num_rsp);
1104
1105 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1106 ptr += sizeof(ir);
1107 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1108 ir.num_rsp))
1da177e4 1109 err = -EFAULT;
8e87d142 1110 } else
1da177e4
LT		 1111 err = -EFAULT;
1112
1113 kfree(buf);
1114
1115done:
1116 hci_dev_put(hdev);
1117 return err;
1118}
1119
3f0f524b
JH		 1120static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1121{
1122 u8 ad_len = 0, flags = 0;
1123 size_t name_len;
1124
f3d3444a 1125 if (test_bit(HCI_ADVERTISING, &hdev->dev_flags))
3f0f524b
JH		 1126 flags |= LE_AD_GENERAL;
1127
11802b29
JH		 1128 if (test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1129 if (lmp_le_br_capable(hdev))
1130 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1131 if (lmp_host_le_br_capable(hdev))
1132 flags |= LE_AD_SIM_LE_BREDR_HOST;
1133 } else {
3f0f524b 1134 flags |= LE_AD_NO_BREDR;
11802b29 1135 }
3f0f524b
JH		 1136
1137 if (flags) {
1138 BT_DBG("adv flags 0x%02x", flags);
1139
1140 ptr[0] = 2;
1141 ptr[1] = EIR_FLAGS;
1142 ptr[2] = flags;
1143
1144 ad_len += 3;
1145 ptr += 3;
1146 }
1147
1148 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1149 ptr[0] = 2;
1150 ptr[1] = EIR_TX_POWER;
1151 ptr[2] = (u8) hdev->adv_tx_power;
1152
1153 ad_len += 3;
1154 ptr += 3;
1155 }
1156
1157 name_len = strlen(hdev->dev_name);
1158 if (name_len > 0) {
1159 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1160
1161 if (name_len > max_len) {
1162 name_len = max_len;
1163 ptr[1] = EIR_NAME_SHORT;
1164 } else
1165 ptr[1] = EIR_NAME_COMPLETE;
1166
1167 ptr[0] = name_len + 1;
1168
1169 memcpy(ptr + 2, hdev->dev_name, name_len);
1170
1171 ad_len += (name_len + 2);
1172 ptr += (name_len + 2);
1173 }
1174
1175 return ad_len;
1176}
1177
04b4edcb 1178void hci_update_ad(struct hci_request *req)
3f0f524b 1179{
04b4edcb 1180 struct hci_dev *hdev = req->hdev;
3f0f524b
JH		 1181 struct hci_cp_le_set_adv_data cp;
1182 u8 len;
3f0f524b 1183
04b4edcb
JH		 1184 if (!lmp_le_capable(hdev))
1185 return;
3f0f524b
JH		 1186
1187 memset(&cp, 0, sizeof(cp));
1188
1189 len = create_ad(hdev, cp.data);
1190
1191 if (hdev->adv_data_len == len &&
04b4edcb
JH		 1192 memcmp(cp.data, hdev->adv_data, len) == 0)
1193 return;
3f0f524b
JH		 1194
1195 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1196 hdev->adv_data_len = len;
1197
1198 cp.length = len;
3f0f524b 1199
04b4edcb 1200 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH		 1201}
1202
cbed0ca1 1203static int hci_dev_do_open(struct hci_dev *hdev)
1da177e4 1204{
1da177e4
LT		 1205 int ret = 0;
1206
1da177e4
LT		 1207 BT_DBG("%s %p", hdev->name, hdev);
1208
1209 hci_req_lock(hdev);
1210
94324962
JH		 1211 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1212 ret = -ENODEV;
1213 goto done;
1214 }
1215
a5c8f270
MH		 1216 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
1217 /* Check for rfkill but allow the HCI setup stage to
1218 * proceed (which in itself doesn't cause any RF activity).
1219 */
1220 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
1221 ret = -ERFKILL;
1222 goto done;
1223 }
1224
1225 /* Check for valid public address or a configured static
1226 * random adddress, but let the HCI setup proceed to
1227 * be able to determine if there is a public address
1228 * or not.
1229 *
1230 * This check is only valid for BR/EDR controllers
1231 * since AMP controllers do not have an address.
1232 */
1233 if (hdev->dev_type == HCI_BREDR &&
1234 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1235 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1236 ret = -EADDRNOTAVAIL;
1237 goto done;
1238 }
611b30f7
MH		 1239 }
1240
1da177e4
LT		 1241 if (test_bit(HCI_UP, &hdev->flags)) {
1242 ret = -EALREADY;
1243 goto done;
1244 }
1245
1da177e4
LT		 1246 if (hdev->open(hdev)) {
1247 ret = -EIO;
1248 goto done;
1249 }
1250
f41c70c4
MH		 1251 atomic_set(&hdev->cmd_cnt, 1);
1252 set_bit(HCI_INIT, &hdev->flags);
1253
1254 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1255 ret = hdev->setup(hdev);
1256
1257 if (!ret) {
f41c70c4
MH		 1258 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1259 set_bit(HCI_RAW, &hdev->flags);
1260
0736cfa8
MH		 1261 if (!test_bit(HCI_RAW, &hdev->flags) &&
1262 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
f41c70c4 1263 ret = __hci_init(hdev);
1da177e4
LT		 1264 }
1265
f41c70c4
MH		 1266 clear_bit(HCI_INIT, &hdev->flags);
1267
1da177e4
LT		 1268 if (!ret) {
1269 hci_dev_hold(hdev);
1270 set_bit(HCI_UP, &hdev->flags);
1271 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a 1272 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
0736cfa8 1273 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1514b892 1274 hdev->dev_type == HCI_BREDR) {
09fd0de5 1275 hci_dev_lock(hdev);
744cf19e 1276 mgmt_powered(hdev, 1);
09fd0de5 1277 hci_dev_unlock(hdev);
56e5cb86 1278 }
8e87d142 1279 } else {
1da177e4 1280 /* Init failed, cleanup */
3eff45ea 1281 flush_work(&hdev->tx_work);
c347b765 1282 flush_work(&hdev->cmd_work);
b78752cc 1283 flush_work(&hdev->rx_work);
1da177e4
LT		 1284
1285 skb_queue_purge(&hdev->cmd_q);
1286 skb_queue_purge(&hdev->rx_q);
1287
1288 if (hdev->flush)
1289 hdev->flush(hdev);
1290
1291 if (hdev->sent_cmd) {
1292 kfree_skb(hdev->sent_cmd);
1293 hdev->sent_cmd = NULL;
1294 }
1295
1296 hdev->close(hdev);
1297 hdev->flags = 0;
1298 }
1299
1300done:
1301 hci_req_unlock(hdev);
1da177e4
LT		 1302 return ret;
1303}
1304
cbed0ca1
JH		 1305/* ---- HCI ioctl helpers ---- */
1306
1307int hci_dev_open(__u16 dev)
1308{
1309 struct hci_dev *hdev;
1310 int err;
1311
1312 hdev = hci_dev_get(dev);
1313 if (!hdev)
1314 return -ENODEV;
1315
e1d08f40
JH		 1316 /* We need to ensure that no other power on/off work is pending
1317 * before proceeding to call hci_dev_do_open. This is
1318 * particularly important if the setup procedure has not yet
1319 * completed.
1320 */
1321 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1322 cancel_delayed_work(&hdev->power_off);
1323
a5c8f270
MH		 1324 /* After this call it is guaranteed that the setup procedure
1325 * has finished. This means that error conditions like RFKILL
1326 * or no valid public or static random address apply.
1327 */
e1d08f40
JH		 1328 flush_workqueue(hdev->req_workqueue);
1329
cbed0ca1
JH		 1330 err = hci_dev_do_open(hdev);
1331
1332 hci_dev_put(hdev);
1333
1334 return err;
1335}
1336
1da177e4
LT		 1337static int hci_dev_do_close(struct hci_dev *hdev)
1338{
1339 BT_DBG("%s %p", hdev->name, hdev);
1340
78c04c0b
VCG		 1341 cancel_delayed_work(&hdev->power_off);
1342
1da177e4
LT		 1343 hci_req_cancel(hdev, ENODEV);
1344 hci_req_lock(hdev);
1345
1346 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1347 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1348 hci_req_unlock(hdev);
1349 return 0;
1350 }
1351
3eff45ea
GP		 1352 /* Flush RX and TX works */
1353 flush_work(&hdev->tx_work);
b78752cc 1354 flush_work(&hdev->rx_work);
1da177e4 1355
16ab91ab 1356 if (hdev->discov_timeout > 0) {
e0f9309f 1357 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1358 hdev->discov_timeout = 0;
5e5282bb 1359 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1360 }
1361
a8b2d5c2 1362 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1363 cancel_delayed_work(&hdev->service_cache);
1364
7ba8b4be
AG		 1365 cancel_delayed_work_sync(&hdev->le_scan_disable);
1366
09fd0de5 1367 hci_dev_lock(hdev);
1f9b9a5d 1368 hci_inquiry_cache_flush(hdev);
1da177e4 1369 hci_conn_hash_flush(hdev);
09fd0de5 1370 hci_dev_unlock(hdev);
1da177e4
LT		 1371
1372 hci_notify(hdev, HCI_DEV_DOWN);
1373
1374 if (hdev->flush)
1375 hdev->flush(hdev);
1376
1377 /* Reset device */
1378 skb_queue_purge(&hdev->cmd_q);
1379 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1380 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1381 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1382 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1383 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1384 clear_bit(HCI_INIT, &hdev->flags);
1385 }
1386
c347b765
GP		 1387 /* flush cmd work */
1388 flush_work(&hdev->cmd_work);
1da177e4
LT		 1389
1390 /* Drop queues */
1391 skb_queue_purge(&hdev->rx_q);
1392 skb_queue_purge(&hdev->cmd_q);
1393 skb_queue_purge(&hdev->raw_q);
1394
1395 /* Drop last sent command */
1396 if (hdev->sent_cmd) {
b79f44c1 1397 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1398 kfree_skb(hdev->sent_cmd);
1399 hdev->sent_cmd = NULL;
1400 }
1401
b6ddb638
JH		 1402 kfree_skb(hdev->recv_evt);
1403 hdev->recv_evt = NULL;
1404
1da177e4
LT		 1405 /* After this point our queues are empty
1406 * and no tasks are scheduled. */
1407 hdev->close(hdev);
1408
35b973c9
JH		 1409 /* Clear flags */
1410 hdev->flags = 0;
1411 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1412
93c311a0
MH		 1413 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
1414 if (hdev->dev_type == HCI_BREDR) {
1415 hci_dev_lock(hdev);
1416 mgmt_powered(hdev, 0);
1417 hci_dev_unlock(hdev);
1418 }
8ee56540 1419 }
5add6af8 1420
ced5c338 1421 /* Controller radio is available but is currently powered down */
536619e8 1422 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 1423
e59fda8d 1424 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1425 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1426
1da177e4
LT		 1427 hci_req_unlock(hdev);
1428
1429 hci_dev_put(hdev);
1430 return 0;
1431}
1432
1433int hci_dev_close(__u16 dev)
1434{
1435 struct hci_dev *hdev;
1436 int err;
1437
70f23020
AE		 1438 hdev = hci_dev_get(dev);
1439 if (!hdev)
1da177e4 1440 return -ENODEV;
8ee56540 1441
0736cfa8
MH		 1442 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1443 err = -EBUSY;
1444 goto done;
1445 }
1446
8ee56540
MH		 1447 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1448 cancel_delayed_work(&hdev->power_off);
1449
1da177e4 1450 err = hci_dev_do_close(hdev);
8ee56540 1451
0736cfa8 1452done:
1da177e4
LT		 1453 hci_dev_put(hdev);
1454 return err;
1455}
1456
1457int hci_dev_reset(__u16 dev)
1458{
1459 struct hci_dev *hdev;
1460 int ret = 0;
1461
70f23020
AE		 1462 hdev = hci_dev_get(dev);
1463 if (!hdev)
1da177e4
LT		 1464 return -ENODEV;
1465
1466 hci_req_lock(hdev);
1da177e4 1467
808a049e
MH		 1468 if (!test_bit(HCI_UP, &hdev->flags)) {
1469 ret = -ENETDOWN;
1da177e4 1470 goto done;
808a049e 1471 }
1da177e4 1472
0736cfa8
MH		 1473 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1474 ret = -EBUSY;
1475 goto done;
1476 }
1477
1da177e4
LT		 1478 /* Drop queues */
1479 skb_queue_purge(&hdev->rx_q);
1480 skb_queue_purge(&hdev->cmd_q);
1481
09fd0de5 1482 hci_dev_lock(hdev);
1f9b9a5d 1483 hci_inquiry_cache_flush(hdev);
1da177e4 1484 hci_conn_hash_flush(hdev);
09fd0de5 1485 hci_dev_unlock(hdev);
1da177e4
LT		 1486
1487 if (hdev->flush)
1488 hdev->flush(hdev);
1489
8e87d142 1490 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1491 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1492
1493 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1494 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1495
1496done:
1da177e4
LT		 1497 hci_req_unlock(hdev);
1498 hci_dev_put(hdev);
1499 return ret;
1500}
1501
1502int hci_dev_reset_stat(__u16 dev)
1503{
1504 struct hci_dev *hdev;
1505 int ret = 0;
1506
70f23020
AE		 1507 hdev = hci_dev_get(dev);
1508 if (!hdev)
1da177e4
LT		 1509 return -ENODEV;
1510
0736cfa8
MH		 1511 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1512 ret = -EBUSY;
1513 goto done;
1514 }
1515
1da177e4
LT		 1516 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1517
0736cfa8 1518done:
1da177e4 1519 hci_dev_put(hdev);
1da177e4
LT		 1520 return ret;
1521}
1522
1523int hci_dev_cmd(unsigned int cmd, void __user *arg)
1524{
1525 struct hci_dev *hdev;
1526 struct hci_dev_req dr;
1527 int err = 0;
1528
1529 if (copy_from_user(&dr, arg, sizeof(dr)))
1530 return -EFAULT;
1531
70f23020
AE		 1532 hdev = hci_dev_get(dr.dev_id);
1533 if (!hdev)
1da177e4
LT		 1534 return -ENODEV;
1535
0736cfa8
MH		 1536 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1537 err = -EBUSY;
1538 goto done;
1539 }
1540
5b69bef5
MH		 1541 if (hdev->dev_type != HCI_BREDR) {
1542 err = -EOPNOTSUPP;
1543 goto done;
1544 }
1545
56f87901
JH		 1546 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1547 err = -EOPNOTSUPP;
1548 goto done;
1549 }
1550
1da177e4
LT		 1551 switch (cmd) {
1552 case HCISETAUTH:
01178cd4
JH		 1553 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1554 HCI_INIT_TIMEOUT);
1da177e4
LT		 1555 break;
1556
1557 case HCISETENCRYPT:
1558 if (!lmp_encrypt_capable(hdev)) {
1559 err = -EOPNOTSUPP;
1560 break;
1561 }
1562
1563 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1564 /* Auth must be enabled first */
01178cd4
JH		 1565 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1566 HCI_INIT_TIMEOUT);
1da177e4
LT		 1567 if (err)
1568 break;
1569 }
1570
01178cd4
JH		 1571 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1572 HCI_INIT_TIMEOUT);
1da177e4
LT		 1573 break;
1574
1575 case HCISETSCAN:
01178cd4
JH		 1576 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1577 HCI_INIT_TIMEOUT);
1da177e4
LT		 1578 break;
1579
1da177e4 1580 case HCISETLINKPOL:
01178cd4
JH		 1581 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1582 HCI_INIT_TIMEOUT);
1da177e4
LT		 1583 break;
1584
1585 case HCISETLINKMODE:
e4e8e37c
MH		 1586 hdev->link_mode = ((__u16) dr.dev_opt) &
1587 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1588 break;
1589
1590 case HCISETPTYPE:
1591 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1592 break;
1593
1594 case HCISETACLMTU:
e4e8e37c
MH		 1595 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1596 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1597 break;
1598
1599 case HCISETSCOMTU:
e4e8e37c
MH		 1600 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1601 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1602 break;
1603
1604 default:
1605 err = -EINVAL;
1606 break;
1607 }
e4e8e37c 1608
0736cfa8 1609done:
1da177e4
LT		 1610 hci_dev_put(hdev);
1611 return err;
1612}
1613
1614int hci_get_dev_list(void __user *arg)
1615{
8035ded4 1616 struct hci_dev *hdev;
1da177e4
LT		 1617 struct hci_dev_list_req *dl;
1618 struct hci_dev_req *dr;
1da177e4
LT		 1619 int n = 0, size, err;
1620 __u16 dev_num;
1621
1622 if (get_user(dev_num, (__u16 __user *) arg))
1623 return -EFAULT;
1624
1625 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1626 return -EINVAL;
1627
1628 size = sizeof(*dl) + dev_num * sizeof(*dr);
1629
70f23020
AE		 1630 dl = kzalloc(size, GFP_KERNEL);
1631 if (!dl)
1da177e4
LT		 1632 return -ENOMEM;
1633
1634 dr = dl->dev_req;
1635
f20d09d5 1636 read_lock(&hci_dev_list_lock);
8035ded4 1637 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1638 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1639 cancel_delayed_work(&hdev->power_off);
c542a06c 1640
a8b2d5c2
JH		 1641 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1642 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1643
1da177e4
LT		 1644 (dr + n)->dev_id = hdev->id;
1645 (dr + n)->dev_opt = hdev->flags;
c542a06c 1646
1da177e4
LT		 1647 if (++n >= dev_num)
1648 break;
1649 }
f20d09d5 1650 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1651
1652 dl->dev_num = n;
1653 size = sizeof(*dl) + n * sizeof(*dr);
1654
1655 err = copy_to_user(arg, dl, size);
1656 kfree(dl);
1657
1658 return err ? -EFAULT : 0;
1659}
1660
1661int hci_get_dev_info(void __user *arg)
1662{
1663 struct hci_dev *hdev;
1664 struct hci_dev_info di;
1665 int err = 0;
1666
1667 if (copy_from_user(&di, arg, sizeof(di)))
1668 return -EFAULT;
1669
70f23020
AE		 1670 hdev = hci_dev_get(di.dev_id);
1671 if (!hdev)
1da177e4
LT		 1672 return -ENODEV;
1673
a8b2d5c2 1674 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1675 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1676
a8b2d5c2
JH		 1677 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1678 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1679
1da177e4
LT		 1680 strcpy(di.name, hdev->name);
1681 di.bdaddr = hdev->bdaddr;
60f2a3ed 1682 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
1da177e4
LT		 1683 di.flags = hdev->flags;
1684 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1685 if (lmp_bredr_capable(hdev)) {
1686 di.acl_mtu = hdev->acl_mtu;
1687 di.acl_pkts = hdev->acl_pkts;
1688 di.sco_mtu = hdev->sco_mtu;
1689 di.sco_pkts = hdev->sco_pkts;
1690 } else {
1691 di.acl_mtu = hdev->le_mtu;
1692 di.acl_pkts = hdev->le_pkts;
1693 di.sco_mtu = 0;
1694 di.sco_pkts = 0;
1695 }
1da177e4
LT		 1696 di.link_policy = hdev->link_policy;
1697 di.link_mode = hdev->link_mode;
1698
1699 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1700 memcpy(&di.features, &hdev->features, sizeof(di.features));
1701
1702 if (copy_to_user(arg, &di, sizeof(di)))
1703 err = -EFAULT;
1704
1705 hci_dev_put(hdev);
1706
1707 return err;
1708}
1709
1710/* ---- Interface to HCI drivers ---- */
1711
611b30f7
MH		 1712static int hci_rfkill_set_block(void *data, bool blocked)
1713{
1714 struct hci_dev *hdev = data;
1715
1716 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1717
0736cfa8
MH		 1718 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
1719 return -EBUSY;
1720
5e130367
JH		 1721 if (blocked) {
1722 set_bit(HCI_RFKILLED, &hdev->dev_flags);
bf543036
JH		 1723 if (!test_bit(HCI_SETUP, &hdev->dev_flags))
1724 hci_dev_do_close(hdev);
5e130367
JH		 1725 } else {
1726 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1025c04c 1727 }
611b30f7
MH		 1728
1729 return 0;
1730}
1731
1732static const struct rfkill_ops hci_rfkill_ops = {
1733 .set_block = hci_rfkill_set_block,
1734};
1735
ab81cbf9
JH		 1736static void hci_power_on(struct work_struct *work)
1737{
1738 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1739 int err;
ab81cbf9
JH		 1740
1741 BT_DBG("%s", hdev->name);
1742
cbed0ca1 1743 err = hci_dev_do_open(hdev);
96570ffc
JH		 1744 if (err < 0) {
1745 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1746 return;
96570ffc 1747 }
ab81cbf9 1748
a5c8f270
MH		 1749 /* During the HCI setup phase, a few error conditions are
1750 * ignored and they need to be checked now. If they are still
1751 * valid, it is important to turn the device back off.
1752 */
1753 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) ||
1754 (hdev->dev_type == HCI_BREDR &&
1755 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1756 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
bf543036
JH		 1757 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1758 hci_dev_do_close(hdev);
1759 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
19202573
JH		 1760 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1761 HCI_AUTO_OFF_TIMEOUT);
bf543036 1762 }
ab81cbf9 1763
a8b2d5c2 1764 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1765 mgmt_index_added(hdev);
ab81cbf9
JH		 1766}
1767
1768static void hci_power_off(struct work_struct *work)
1769{
3243553f 1770 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1771 power_off.work);
ab81cbf9
JH		 1772
1773 BT_DBG("%s", hdev->name);
1774
8ee56540 1775 hci_dev_do_close(hdev);
ab81cbf9
JH		 1776}
1777
16ab91ab
JH		 1778static void hci_discov_off(struct work_struct *work)
1779{
1780 struct hci_dev *hdev;
1781 u8 scan = SCAN_PAGE;
1782
1783 hdev = container_of(work, struct hci_dev, discov_off.work);
1784
1785 BT_DBG("%s", hdev->name);
1786
09fd0de5 1787 hci_dev_lock(hdev);
16ab91ab
JH		 1788
1789 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1790
1791 hdev->discov_timeout = 0;
1792
09fd0de5 1793 hci_dev_unlock(hdev);
16ab91ab
JH		 1794}
1795
2aeb9a1a
JH		 1796int hci_uuids_clear(struct hci_dev *hdev)
1797{
4821002c 1798 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1799
4821002c
JH		 1800 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1801 list_del(&uuid->list);
2aeb9a1a
JH		 1802 kfree(uuid);
1803 }
1804
1805 return 0;
1806}
1807
55ed8ca1
JH		 1808int hci_link_keys_clear(struct hci_dev *hdev)
1809{
1810 struct list_head *p, *n;
1811
1812 list_for_each_safe(p, n, &hdev->link_keys) {
1813 struct link_key *key;
1814
1815 key = list_entry(p, struct link_key, list);
1816
1817 list_del(p);
1818 kfree(key);
1819 }
1820
1821 return 0;
1822}
1823
b899efaf
VCG		 1824int hci_smp_ltks_clear(struct hci_dev *hdev)
1825{
1826 struct smp_ltk *k, *tmp;
1827
1828 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1829 list_del(&k->list);
1830 kfree(k);
1831 }
1832
1833 return 0;
1834}
1835
55ed8ca1
JH		 1836struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1837{
8035ded4 1838 struct link_key *k;
55ed8ca1 1839
8035ded4 1840 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1841 if (bacmp(bdaddr, &k->bdaddr) == 0)
1842 return k;
55ed8ca1
JH		 1843
1844 return NULL;
1845}
1846
745c0ce3 1847static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1848 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1849{
1850 /* Legacy key */
1851 if (key_type < 0x03)
745c0ce3 1852 return true;
d25e28ab
JH		 1853
1854 /* Debug keys are insecure so don't store them persistently */
1855 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1856 return false;
d25e28ab
JH		 1857
1858 /* Changed combination key and there's no previous one */
1859 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1860 return false;
d25e28ab
JH		 1861
1862 /* Security mode 3 case */
1863 if (!conn)
745c0ce3 1864 return true;
d25e28ab
JH		 1865
1866 /* Neither local nor remote side had no-bonding as requirement */
1867 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1868 return true;
d25e28ab
JH		 1869
1870 /* Local side had dedicated bonding as requirement */
1871 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1872 return true;
d25e28ab
JH		 1873
1874 /* Remote side had dedicated bonding as requirement */
1875 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1876 return true;
d25e28ab
JH		 1877
1878 /* If none of the above criteria match, then don't store the key
1879 * persistently */
745c0ce3 1880 return false;
d25e28ab
JH		 1881}
1882
c9839a11 1883struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1884{
c9839a11 1885 struct smp_ltk *k;
75d262c2 1886
c9839a11
VCG		 1887 list_for_each_entry(k, &hdev->long_term_keys, list) {
1888 if (k->ediv != ediv ||
a8c5fb1a 1889 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1890 continue;
1891
c9839a11 1892 return k;
75d262c2
VCG		 1893 }
1894
1895 return NULL;
1896}
75d262c2 1897
c9839a11 1898struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1899 u8 addr_type)
75d262c2 1900{
c9839a11 1901 struct smp_ltk *k;
75d262c2 1902
c9839a11
VCG		 1903 list_for_each_entry(k, &hdev->long_term_keys, list)
1904 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1905 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1906 return k;
1907
1908 return NULL;
1909}
75d262c2 1910
d25e28ab 1911int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1912 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1913{
1914 struct link_key *key, *old_key;
745c0ce3
VA		 1915 u8 old_key_type;
1916 bool persistent;
55ed8ca1
JH		 1917
1918 old_key = hci_find_link_key(hdev, bdaddr);
1919 if (old_key) {
1920 old_key_type = old_key->type;
1921 key = old_key;
1922 } else {
12adcf3a 1923 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1924 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1925 if (!key)
1926 return -ENOMEM;
1927 list_add(&key->list, &hdev->link_keys);
1928 }
1929
6ed93dc6 1930 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1931
d25e28ab
JH		 1932 /* Some buggy controller combinations generate a changed
1933 * combination key for legacy pairing even when there's no
1934 * previous key */
1935 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1936 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1937 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1938 if (conn)
1939 conn->key_type = type;
1940 }
d25e28ab 1941
55ed8ca1 1942 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1943 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1944 key->pin_len = pin_len;
1945
b6020ba0 1946 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1947 key->type = old_key_type;
4748fed2
JH		 1948 else
1949 key->type = type;
1950
4df378a1
JH		 1951 if (!new_key)
1952 return 0;
1953
1954 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1955
744cf19e 1956 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1957
6ec5bcad
VA		 1958 if (conn)
1959 conn->flush_key = !persistent;
55ed8ca1
JH		 1960
1961 return 0;
1962}
1963
c9839a11 1964int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1965 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1966 ediv, u8 rand[8])
75d262c2 1967{
c9839a11 1968 struct smp_ltk *key, *old_key;
75d262c2 1969
c9839a11
VCG		 1970 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1971 return 0;
75d262c2 1972
c9839a11
VCG		 1973 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1974 if (old_key)
75d262c2 1975 key = old_key;
c9839a11
VCG		 1976 else {
1977 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1978 if (!key)
1979 return -ENOMEM;
c9839a11 1980 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1981 }
1982
75d262c2 1983 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1984 key->bdaddr_type = addr_type;
1985 memcpy(key->val, tk, sizeof(key->val));
1986 key->authenticated = authenticated;
1987 key->ediv = ediv;
1988 key->enc_size = enc_size;
1989 key->type = type;
1990 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1991
c9839a11
VCG		 1992 if (!new_key)
1993 return 0;
75d262c2 1994
261cc5aa
VCG		 1995 if (type & HCI_SMP_LTK)
1996 mgmt_new_ltk(hdev, key, 1);
1997
75d262c2
VCG		 1998 return 0;
1999}
2000
55ed8ca1
JH		 2001int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2002{
2003 struct link_key *key;
2004
2005 key = hci_find_link_key(hdev, bdaddr);
2006 if (!key)
2007 return -ENOENT;
2008
6ed93dc6 2009 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 2010
2011 list_del(&key->list);
2012 kfree(key);
2013
2014 return 0;
2015}
2016
b899efaf
VCG		 2017int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
2018{
2019 struct smp_ltk *k, *tmp;
2020
2021 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
2022 if (bacmp(bdaddr, &k->bdaddr))
2023 continue;
2024
6ed93dc6 2025 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 2026
2027 list_del(&k->list);
2028 kfree(k);
2029 }
2030
2031 return 0;
2032}
2033
6bd32326 2034/* HCI command timer function */
bda4f23a 2035static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 2036{
2037 struct hci_dev *hdev = (void *) arg;
2038
bda4f23a
AE		 2039 if (hdev->sent_cmd) {
2040 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2041 u16 opcode = __le16_to_cpu(sent->opcode);
2042
2043 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2044 } else {
2045 BT_ERR("%s command tx timeout", hdev->name);
2046 }
2047
6bd32326 2048 atomic_set(&hdev->cmd_cnt, 1);
c347b765 2049 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 2050}
2051
2763eda6 2052struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 2053 bdaddr_t *bdaddr)
2763eda6
SJ		 2054{
2055 struct oob_data *data;
2056
2057 list_for_each_entry(data, &hdev->remote_oob_data, list)
2058 if (bacmp(bdaddr, &data->bdaddr) == 0)
2059 return data;
2060
2061 return NULL;
2062}
2063
2064int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
2065{
2066 struct oob_data *data;
2067
2068 data = hci_find_remote_oob_data(hdev, bdaddr);
2069 if (!data)
2070 return -ENOENT;
2071
6ed93dc6 2072 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2073
2074 list_del(&data->list);
2075 kfree(data);
2076
2077 return 0;
2078}
2079
2080int hci_remote_oob_data_clear(struct hci_dev *hdev)
2081{
2082 struct oob_data *data, *n;
2083
2084 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2085 list_del(&data->list);
2086 kfree(data);
2087 }
2088
2089 return 0;
2090}
2091
2092int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 2093 u8 *randomizer)
2763eda6
SJ		 2094{
2095 struct oob_data *data;
2096
2097 data = hci_find_remote_oob_data(hdev, bdaddr);
2098
2099 if (!data) {
2100 data = kmalloc(sizeof(*data), GFP_ATOMIC);
2101 if (!data)
2102 return -ENOMEM;
2103
2104 bacpy(&data->bdaddr, bdaddr);
2105 list_add(&data->list, &hdev->remote_oob_data);
2106 }
2107
2108 memcpy(data->hash, hash, sizeof(data->hash));
2109 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
2110
6ed93dc6 2111 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2112
2113 return 0;
2114}
2115
04124681 2116struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 2117{
8035ded4 2118 struct bdaddr_list *b;
b2a66aad 2119
8035ded4 2120 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 2121 if (bacmp(bdaddr, &b->bdaddr) == 0)
2122 return b;
b2a66aad
AJ		 2123
2124 return NULL;
2125}
2126
2127int hci_blacklist_clear(struct hci_dev *hdev)
2128{
2129 struct list_head *p, *n;
2130
2131 list_for_each_safe(p, n, &hdev->blacklist) {
2132 struct bdaddr_list *b;
2133
2134 b = list_entry(p, struct bdaddr_list, list);
2135
2136 list_del(p);
2137 kfree(b);
2138 }
2139
2140 return 0;
2141}
2142
88c1fe4b 2143int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2144{
2145 struct bdaddr_list *entry;
b2a66aad
AJ		 2146
2147 if (bacmp(bdaddr, BDADDR_ANY) == 0)
2148 return -EBADF;
2149
5e762444
AJ		 2150 if (hci_blacklist_lookup(hdev, bdaddr))
2151 return -EEXIST;
b2a66aad
AJ		 2152
2153 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 2154 if (!entry)
2155 return -ENOMEM;
b2a66aad
AJ		 2156
2157 bacpy(&entry->bdaddr, bdaddr);
2158
2159 list_add(&entry->list, &hdev->blacklist);
2160
88c1fe4b 2161 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 2162}
2163
88c1fe4b 2164int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2165{
2166 struct bdaddr_list *entry;
b2a66aad 2167
1ec918ce 2168 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 2169 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 2170
2171 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 2172 if (!entry)
5e762444 2173 return -ENOENT;
b2a66aad
AJ		 2174
2175 list_del(&entry->list);
2176 kfree(entry);
2177
88c1fe4b 2178 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 2179}
2180
4c87eaab 2181static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2182{
4c87eaab
AG		 2183 if (status) {
2184 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 2185
4c87eaab
AG		 2186 hci_dev_lock(hdev);
2187 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2188 hci_dev_unlock(hdev);
2189 return;
2190 }
7ba8b4be
AG		 2191}
2192
4c87eaab 2193static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2194{
4c87eaab
AG		 2195 /* General inquiry access code (GIAC) */
2196 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2197 struct hci_request req;
2198 struct hci_cp_inquiry cp;
7ba8b4be
AG		 2199 int err;
2200
4c87eaab
AG		 2201 if (status) {
2202 BT_ERR("Failed to disable LE scanning: status %d", status);
2203 return;
2204 }
7ba8b4be 2205
4c87eaab
AG		 2206 switch (hdev->discovery.type) {
2207 case DISCOV_TYPE_LE:
2208 hci_dev_lock(hdev);
2209 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2210 hci_dev_unlock(hdev);
2211 break;
7ba8b4be 2212
4c87eaab
AG		 2213 case DISCOV_TYPE_INTERLEAVED:
2214 hci_req_init(&req, hdev);
7ba8b4be 2215
4c87eaab
AG		 2216 memset(&cp, 0, sizeof(cp));
2217 memcpy(&cp.lap, lap, sizeof(cp.lap));
2218 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2219 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 2220
4c87eaab 2221 hci_dev_lock(hdev);
7dbfac1d 2222
4c87eaab 2223 hci_inquiry_cache_flush(hdev);
7dbfac1d 2224
4c87eaab
AG		 2225 err = hci_req_run(&req, inquiry_complete);
2226 if (err) {
2227 BT_ERR("Inquiry request failed: err %d", err);
2228 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2229 }
7dbfac1d 2230
4c87eaab
AG		 2231 hci_dev_unlock(hdev);
2232 break;
7dbfac1d 2233 }
7dbfac1d
AG		 2234}
2235
7ba8b4be
AG		 2236static void le_scan_disable_work(struct work_struct *work)
2237{
2238 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2239 le_scan_disable.work);
7ba8b4be 2240 struct hci_cp_le_set_scan_enable cp;
4c87eaab
AG		 2241 struct hci_request req;
2242 int err;
7ba8b4be
AG		 2243
2244 BT_DBG("%s", hdev->name);
2245
4c87eaab 2246 hci_req_init(&req, hdev);
28b75a89 2247
7ba8b4be 2248 memset(&cp, 0, sizeof(cp));
4c87eaab
AG		 2249 cp.enable = LE_SCAN_DISABLE;
2250 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
28b75a89 2251
4c87eaab
AG		 2252 err = hci_req_run(&req, le_scan_disable_work_complete);
2253 if (err)
2254 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 2255}
2256
9be0dab7
DH		 2257/* Alloc HCI device */
2258struct hci_dev *hci_alloc_dev(void)
2259{
2260 struct hci_dev *hdev;
2261
2262 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2263 if (!hdev)
2264 return NULL;
2265
b1b813d4
DH		 2266 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2267 hdev->esco_type = (ESCO_HV1);
2268 hdev->link_mode = (HCI_LM_ACCEPT);
2269 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 2270 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2271 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2272
b1b813d4
DH		 2273 hdev->sniff_max_interval = 800;
2274 hdev->sniff_min_interval = 80;
2275
2276 mutex_init(&hdev->lock);
2277 mutex_init(&hdev->req_lock);
2278
2279 INIT_LIST_HEAD(&hdev->mgmt_pending);
2280 INIT_LIST_HEAD(&hdev->blacklist);
2281 INIT_LIST_HEAD(&hdev->uuids);
2282 INIT_LIST_HEAD(&hdev->link_keys);
2283 INIT_LIST_HEAD(&hdev->long_term_keys);
2284 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 2285 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2286
2287 INIT_WORK(&hdev->rx_work, hci_rx_work);
2288 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2289 INIT_WORK(&hdev->tx_work, hci_tx_work);
2290 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 2291
b1b813d4
DH		 2292 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2293 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2294 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2295
b1b813d4
DH		 2296 skb_queue_head_init(&hdev->rx_q);
2297 skb_queue_head_init(&hdev->cmd_q);
2298 skb_queue_head_init(&hdev->raw_q);
2299
2300 init_waitqueue_head(&hdev->req_wait_q);
2301
bda4f23a 2302 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2303
b1b813d4
DH		 2304 hci_init_sysfs(hdev);
2305 discovery_init(hdev);
9be0dab7
DH		 2306
2307 return hdev;
2308}
2309EXPORT_SYMBOL(hci_alloc_dev);
2310
2311/* Free HCI device */
2312void hci_free_dev(struct hci_dev *hdev)
2313{
9be0dab7
DH		 2314 /* will free via device release */
2315 put_device(&hdev->dev);
2316}
2317EXPORT_SYMBOL(hci_free_dev);
2318
1da177e4
LT		 2319/* Register HCI device */
2320int hci_register_dev(struct hci_dev *hdev)
2321{
b1b813d4 2322 int id, error;
1da177e4 2323
010666a1 2324 if (!hdev->open || !hdev->close)
1da177e4
LT		 2325 return -EINVAL;
2326
08add513
MM		 2327 /* Do not allow HCI_AMP devices to register at index 0,
2328 * so the index can be used as the AMP controller ID.
2329 */
3df92b31
SL		 2330 switch (hdev->dev_type) {
2331 case HCI_BREDR:
2332 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2333 break;
2334 case HCI_AMP:
2335 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2336 break;
2337 default:
2338 return -EINVAL;
1da177e4 2339 }
8e87d142 2340
3df92b31
SL		 2341 if (id < 0)
2342 return id;
2343
1da177e4
LT		 2344 sprintf(hdev->name, "hci%d", id);
2345 hdev->id = id;
2d8b3a11
AE		 2346
2347 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2348
d8537548
KC		 2349 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2350 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 2351 if (!hdev->workqueue) {
2352 error = -ENOMEM;
2353 goto err;
2354 }
f48fd9c8 2355
d8537548
KC		 2356 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2357 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 2358 if (!hdev->req_workqueue) {
2359 destroy_workqueue(hdev->workqueue);
2360 error = -ENOMEM;
2361 goto err;
2362 }
2363
33ca954d
DH		 2364 error = hci_add_sysfs(hdev);
2365 if (error < 0)
2366 goto err_wqueue;
1da177e4 2367
611b30f7 2368 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2369 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2370 hdev);
611b30f7
MH		 2371 if (hdev->rfkill) {
2372 if (rfkill_register(hdev->rfkill) < 0) {
2373 rfkill_destroy(hdev->rfkill);
2374 hdev->rfkill = NULL;
2375 }
2376 }
2377
5e130367
JH		 2378 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2379 set_bit(HCI_RFKILLED, &hdev->dev_flags);
2380
a8b2d5c2 2381 set_bit(HCI_SETUP, &hdev->dev_flags);
004b0258 2382 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ce2be9ac 2383
01cd3404 2384 if (hdev->dev_type == HCI_BREDR) {
56f87901
JH		 2385 /* Assume BR/EDR support until proven otherwise (such as
2386 * through reading supported features during init.
2387 */
2388 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2389 }
ce2be9ac 2390
fcee3377
GP		 2391 write_lock(&hci_dev_list_lock);
2392 list_add(&hdev->list, &hci_dev_list);
2393 write_unlock(&hci_dev_list_lock);
2394
1da177e4 2395 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2396 hci_dev_hold(hdev);
1da177e4 2397
19202573 2398 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2399
1da177e4 2400 return id;
f48fd9c8 2401
33ca954d
DH		 2402err_wqueue:
2403 destroy_workqueue(hdev->workqueue);
6ead1bbc 2404 destroy_workqueue(hdev->req_workqueue);
33ca954d 2405err:
3df92b31 2406 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 2407
33ca954d 2408 return error;
1da177e4
LT		 2409}
2410EXPORT_SYMBOL(hci_register_dev);
2411
2412/* Unregister HCI device */
59735631 2413void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2414{
3df92b31 2415 int i, id;
ef222013 2416
c13854ce 2417 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2418
94324962
JH		 2419 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2420
3df92b31
SL		 2421 id = hdev->id;
2422
f20d09d5 2423 write_lock(&hci_dev_list_lock);
1da177e4 2424 list_del(&hdev->list);
f20d09d5 2425 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2426
2427 hci_dev_do_close(hdev);
2428
cd4c5391 2429 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2430 kfree_skb(hdev->reassembly[i]);
2431
b9b5ef18
GP		 2432 cancel_work_sync(&hdev->power_on);
2433
ab81cbf9 2434 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2435 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2436 hci_dev_lock(hdev);
744cf19e 2437 mgmt_index_removed(hdev);
09fd0de5 2438 hci_dev_unlock(hdev);
56e5cb86 2439 }
ab81cbf9 2440
2e58ef3e
JH		 2441 /* mgmt_index_removed should take care of emptying the
2442 * pending list */
2443 BUG_ON(!list_empty(&hdev->mgmt_pending));
2444
1da177e4
LT		 2445 hci_notify(hdev, HCI_DEV_UNREG);
2446
611b30f7
MH		 2447 if (hdev->rfkill) {
2448 rfkill_unregister(hdev->rfkill);
2449 rfkill_destroy(hdev->rfkill);
2450 }
2451
ce242970 2452 hci_del_sysfs(hdev);
147e2d59 2453
f48fd9c8 2454 destroy_workqueue(hdev->workqueue);
6ead1bbc 2455 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2456
09fd0de5 2457 hci_dev_lock(hdev);
e2e0cacb 2458 hci_blacklist_clear(hdev);
2aeb9a1a 2459 hci_uuids_clear(hdev);
55ed8ca1 2460 hci_link_keys_clear(hdev);
b899efaf 2461 hci_smp_ltks_clear(hdev);
2763eda6 2462 hci_remote_oob_data_clear(hdev);
09fd0de5 2463 hci_dev_unlock(hdev);
e2e0cacb 2464
dc946bd8 2465 hci_dev_put(hdev);
3df92b31
SL		 2466
2467 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2468}
2469EXPORT_SYMBOL(hci_unregister_dev);
2470
2471/* Suspend HCI device */
2472int hci_suspend_dev(struct hci_dev *hdev)
2473{
2474 hci_notify(hdev, HCI_DEV_SUSPEND);
2475 return 0;
2476}
2477EXPORT_SYMBOL(hci_suspend_dev);
2478
2479/* Resume HCI device */
2480int hci_resume_dev(struct hci_dev *hdev)
2481{
2482 hci_notify(hdev, HCI_DEV_RESUME);
2483 return 0;
2484}
2485EXPORT_SYMBOL(hci_resume_dev);
2486
76bca880 2487/* Receive frame from HCI drivers */
e1a26170 2488int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 2489{
76bca880 2490 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2491 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2492 kfree_skb(skb);
2493 return -ENXIO;
2494 }
2495
d82603c6 2496 /* Incoming skb */
76bca880
MH		 2497 bt_cb(skb)->incoming = 1;
2498
2499 /* Time stamp */
2500 __net_timestamp(skb);
2501
76bca880 2502 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2503 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2504
76bca880
MH		 2505 return 0;
2506}
2507EXPORT_SYMBOL(hci_recv_frame);
2508
33e882a5 2509static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2510 int count, __u8 index)
33e882a5
SS		 2511{
2512 int len = 0;
2513 int hlen = 0;
2514 int remain = count;
2515 struct sk_buff *skb;
2516 struct bt_skb_cb *scb;
2517
2518 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2519 index >= NUM_REASSEMBLY)
33e882a5
SS		 2520 return -EILSEQ;
2521
2522 skb = hdev->reassembly[index];
2523
2524 if (!skb) {
2525 switch (type) {
2526 case HCI_ACLDATA_PKT:
2527 len = HCI_MAX_FRAME_SIZE;
2528 hlen = HCI_ACL_HDR_SIZE;
2529 break;
2530 case HCI_EVENT_PKT:
2531 len = HCI_MAX_EVENT_SIZE;
2532 hlen = HCI_EVENT_HDR_SIZE;
2533 break;
2534 case HCI_SCODATA_PKT:
2535 len = HCI_MAX_SCO_SIZE;
2536 hlen = HCI_SCO_HDR_SIZE;
2537 break;
2538 }
2539
1e429f38 2540 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2541 if (!skb)
2542 return -ENOMEM;
2543
2544 scb = (void *) skb->cb;
2545 scb->expect = hlen;
2546 scb->pkt_type = type;
2547
33e882a5
SS		 2548 hdev->reassembly[index] = skb;
2549 }
2550
2551 while (count) {
2552 scb = (void *) skb->cb;
89bb46d0 2553 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2554
2555 memcpy(skb_put(skb, len), data, len);
2556
2557 count -= len;
2558 data += len;
2559 scb->expect -= len;
2560 remain = count;
2561
2562 switch (type) {
2563 case HCI_EVENT_PKT:
2564 if (skb->len == HCI_EVENT_HDR_SIZE) {
2565 struct hci_event_hdr *h = hci_event_hdr(skb);
2566 scb->expect = h->plen;
2567
2568 if (skb_tailroom(skb) < scb->expect) {
2569 kfree_skb(skb);
2570 hdev->reassembly[index] = NULL;
2571 return -ENOMEM;
2572 }
2573 }
2574 break;
2575
2576 case HCI_ACLDATA_PKT:
2577 if (skb->len == HCI_ACL_HDR_SIZE) {
2578 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2579 scb->expect = __le16_to_cpu(h->dlen);
2580
2581 if (skb_tailroom(skb) < scb->expect) {
2582 kfree_skb(skb);
2583 hdev->reassembly[index] = NULL;
2584 return -ENOMEM;
2585 }
2586 }
2587 break;
2588
2589 case HCI_SCODATA_PKT:
2590 if (skb->len == HCI_SCO_HDR_SIZE) {
2591 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2592 scb->expect = h->dlen;
2593
2594 if (skb_tailroom(skb) < scb->expect) {
2595 kfree_skb(skb);
2596 hdev->reassembly[index] = NULL;
2597 return -ENOMEM;
2598 }
2599 }
2600 break;
2601 }
2602
2603 if (scb->expect == 0) {
2604 /* Complete frame */
2605
2606 bt_cb(skb)->pkt_type = type;
e1a26170 2607 hci_recv_frame(hdev, skb);
33e882a5
SS		 2608
2609 hdev->reassembly[index] = NULL;
2610 return remain;
2611 }
2612 }
2613
2614 return remain;
2615}
2616
ef222013
MH		 2617int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2618{
f39a3c06
SS		 2619 int rem = 0;
2620
ef222013
MH		 2621 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2622 return -EILSEQ;
2623
da5f6c37 2624 while (count) {
1e429f38 2625 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2626 if (rem < 0)
2627 return rem;
ef222013 2628
f39a3c06
SS		 2629 data += (count - rem);
2630 count = rem;
f81c6224 2631 }
ef222013 2632
f39a3c06 2633 return rem;
ef222013
MH		 2634}
2635EXPORT_SYMBOL(hci_recv_fragment);
2636
99811510
SS		 2637#define STREAM_REASSEMBLY 0
2638
2639int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2640{
2641 int type;
2642 int rem = 0;
2643
da5f6c37 2644 while (count) {
99811510
SS		 2645 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2646
2647 if (!skb) {
2648 struct { char type; } *pkt;
2649
2650 /* Start of the frame */
2651 pkt = data;
2652 type = pkt->type;
2653
2654 data++;
2655 count--;
2656 } else
2657 type = bt_cb(skb)->pkt_type;
2658
1e429f38 2659 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2660 STREAM_REASSEMBLY);
99811510
SS		 2661 if (rem < 0)
2662 return rem;
2663
2664 data += (count - rem);
2665 count = rem;
f81c6224 2666 }
99811510
SS		 2667
2668 return rem;
2669}
2670EXPORT_SYMBOL(hci_recv_stream_fragment);
2671
1da177e4
LT		 2672/* ---- Interface to upper protocols ---- */
2673
1da177e4
LT		 2674int hci_register_cb(struct hci_cb *cb)
2675{
2676 BT_DBG("%p name %s", cb, cb->name);
2677
f20d09d5 2678 write_lock(&hci_cb_list_lock);
1da177e4 2679 list_add(&cb->list, &hci_cb_list);
f20d09d5 2680 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2681
2682 return 0;
2683}
2684EXPORT_SYMBOL(hci_register_cb);
2685
2686int hci_unregister_cb(struct hci_cb *cb)
2687{
2688 BT_DBG("%p name %s", cb, cb->name);
2689
f20d09d5 2690 write_lock(&hci_cb_list_lock);
1da177e4 2691 list_del(&cb->list);
f20d09d5 2692 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2693
2694 return 0;
2695}
2696EXPORT_SYMBOL(hci_unregister_cb);
2697
51086991 2698static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 2699{
0d48d939 2700 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2701
cd82e61c
MH		 2702 /* Time stamp */
2703 __net_timestamp(skb);
1da177e4 2704
cd82e61c
MH		 2705 /* Send copy to monitor */
2706 hci_send_to_monitor(hdev, skb);
2707
2708 if (atomic_read(&hdev->promisc)) {
2709 /* Send copy to the sockets */
470fe1b5 2710 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2711 }
2712
2713 /* Get rid of skb owner, prior to sending to the driver. */
2714 skb_orphan(skb);
2715
7bd8f09f 2716 if (hdev->send(hdev, skb) < 0)
51086991 2717 BT_ERR("%s sending frame failed", hdev->name);
1da177e4
LT		 2718}
2719
3119ae95
JH		 2720void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2721{
2722 skb_queue_head_init(&req->cmd_q);
2723 req->hdev = hdev;
5d73e034 2724 req->err = 0;
3119ae95
JH		 2725}
2726
2727int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2728{
2729 struct hci_dev *hdev = req->hdev;
2730 struct sk_buff *skb;
2731 unsigned long flags;
2732
2733 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2734
5d73e034
AG		 2735 /* If an error occured during request building, remove all HCI
2736 * commands queued on the HCI request queue.
2737 */
2738 if (req->err) {
2739 skb_queue_purge(&req->cmd_q);
2740 return req->err;
2741 }
2742
3119ae95
JH		 2743 /* Do not allow empty requests */
2744 if (skb_queue_empty(&req->cmd_q))
382b0c39 2745 return -ENODATA;
3119ae95
JH		 2746
2747 skb = skb_peek_tail(&req->cmd_q);
2748 bt_cb(skb)->req.complete = complete;
2749
2750 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2751 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2752 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2753
2754 queue_work(hdev->workqueue, &hdev->cmd_work);
2755
2756 return 0;
2757}
2758
1ca3a9d0 2759static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2760 u32 plen, const void *param)
1da177e4
LT		 2761{
2762 int len = HCI_COMMAND_HDR_SIZE + plen;
2763 struct hci_command_hdr *hdr;
2764 struct sk_buff *skb;
2765
1da177e4 2766 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2767 if (!skb)
2768 return NULL;
1da177e4
LT		 2769
2770 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2771 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2772 hdr->plen = plen;
2773
2774 if (plen)
2775 memcpy(skb_put(skb, plen), param, plen);
2776
2777 BT_DBG("skb len %d", skb->len);
2778
0d48d939 2779 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
c78ae283 2780
1ca3a9d0
JH		 2781 return skb;
2782}
2783
2784/* Send HCI command */
07dc93dd
JH		 2785int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2786 const void *param)
1ca3a9d0
JH		 2787{
2788 struct sk_buff *skb;
2789
2790 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2791
2792 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2793 if (!skb) {
2794 BT_ERR("%s no memory for command", hdev->name);
2795 return -ENOMEM;
2796 }
2797
11714b3d
JH		 2798 /* Stand-alone HCI commands must be flaged as
2799 * single-command requests.
2800 */
2801 bt_cb(skb)->req.start = true;
2802
1da177e4 2803 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2804 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2805
2806 return 0;
2807}
1da177e4 2808
71c76a17 2809/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 2810void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2811 const void *param, u8 event)
71c76a17
JH		 2812{
2813 struct hci_dev *hdev = req->hdev;
2814 struct sk_buff *skb;
2815
2816 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2817
34739c1e
AG		 2818 /* If an error occured during request building, there is no point in
2819 * queueing the HCI command. We can simply return.
2820 */
2821 if (req->err)
2822 return;
2823
71c76a17
JH		 2824 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2825 if (!skb) {
5d73e034
AG		 2826 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2827 hdev->name, opcode);
2828 req->err = -ENOMEM;
e348fe6b 2829 return;
71c76a17
JH		 2830 }
2831
2832 if (skb_queue_empty(&req->cmd_q))
2833 bt_cb(skb)->req.start = true;
2834
02350a72
JH		 2835 bt_cb(skb)->req.event = event;
2836
71c76a17 2837 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 2838}
2839
07dc93dd
JH		 2840void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2841 const void *param)
02350a72
JH		 2842{
2843 hci_req_add_ev(req, opcode, plen, param, 0);
2844}
2845
1da177e4 2846/* Get data from the previously sent command */
a9de9248 2847void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2848{
2849 struct hci_command_hdr *hdr;
2850
2851 if (!hdev->sent_cmd)
2852 return NULL;
2853
2854 hdr = (void *) hdev->sent_cmd->data;
2855
a9de9248 2856 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2857 return NULL;
2858
f0e09510 2859 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2860
2861 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2862}
2863
2864/* Send ACL data */
2865static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2866{
2867 struct hci_acl_hdr *hdr;
2868 int len = skb->len;
2869
badff6d0
ACM		 2870 skb_push(skb, HCI_ACL_HDR_SIZE);
2871 skb_reset_transport_header(skb);
9c70220b 2872 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2873 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2874 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2875}
2876
ee22be7e 2877static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2878 struct sk_buff *skb, __u16 flags)
1da177e4 2879{
ee22be7e 2880 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2881 struct hci_dev *hdev = conn->hdev;
2882 struct sk_buff *list;
2883
087bfd99
GP		 2884 skb->len = skb_headlen(skb);
2885 skb->data_len = 0;
2886
2887 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2888
2889 switch (hdev->dev_type) {
2890 case HCI_BREDR:
2891 hci_add_acl_hdr(skb, conn->handle, flags);
2892 break;
2893 case HCI_AMP:
2894 hci_add_acl_hdr(skb, chan->handle, flags);
2895 break;
2896 default:
2897 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2898 return;
2899 }
087bfd99 2900
70f23020
AE		 2901 list = skb_shinfo(skb)->frag_list;
2902 if (!list) {
1da177e4
LT		 2903 /* Non fragmented */
2904 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2905
73d80deb 2906 skb_queue_tail(queue, skb);
1da177e4
LT		 2907 } else {
2908 /* Fragmented */
2909 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2910
2911 skb_shinfo(skb)->frag_list = NULL;
2912
2913 /* Queue all fragments atomically */
af3e6359 2914 spin_lock(&queue->lock);
1da177e4 2915
73d80deb 2916 __skb_queue_tail(queue, skb);
e702112f
AE		 2917
2918 flags &= ~ACL_START;
2919 flags |= ACL_CONT;
1da177e4
LT		 2920 do {
2921 skb = list; list = list->next;
8e87d142 2922
0d48d939 2923 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2924 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2925
2926 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2927
73d80deb 2928 __skb_queue_tail(queue, skb);
1da177e4
LT		 2929 } while (list);
2930
af3e6359 2931 spin_unlock(&queue->lock);
1da177e4 2932 }
73d80deb
LAD		 2933}
2934
2935void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2936{
ee22be7e 2937 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2938
f0e09510 2939 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 2940
ee22be7e 2941 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2942
3eff45ea 2943 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2944}
1da177e4
LT		 2945
2946/* Send SCO data */
0d861d8b 2947void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2948{
2949 struct hci_dev *hdev = conn->hdev;
2950 struct hci_sco_hdr hdr;
2951
2952 BT_DBG("%s len %d", hdev->name, skb->len);
2953
aca3192c 2954 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2955 hdr.dlen = skb->len;
2956
badff6d0
ACM		 2957 skb_push(skb, HCI_SCO_HDR_SIZE);
2958 skb_reset_transport_header(skb);
9c70220b 2959 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 2960
0d48d939 2961 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2962
1da177e4 2963 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2964 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2965}
1da177e4
LT		 2966
2967/* ---- HCI TX task (outgoing data) ---- */
2968
2969/* HCI Connection scheduler */
6039aa73
GP		 2970static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2971 int *quote)
1da177e4
LT		 2972{
2973 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2974 struct hci_conn *conn = NULL, *c;
abc5de8f 2975 unsigned int num = 0, min = ~0;
1da177e4 2976
8e87d142 2977 /* We don't have to lock device here. Connections are always
1da177e4 2978 * added and removed with TX task disabled. */
bf4c6325
GP		 2979
2980 rcu_read_lock();
2981
2982 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2983 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2984 continue;
769be974
MH		 2985
2986 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2987 continue;
2988
1da177e4
LT		 2989 num++;
2990
2991 if (c->sent < min) {
2992 min = c->sent;
2993 conn = c;
2994 }
52087a79
LAD		 2995
2996 if (hci_conn_num(hdev, type) == num)
2997 break;
1da177e4
LT		 2998 }
2999
bf4c6325
GP		 3000 rcu_read_unlock();
3001
1da177e4 3002 if (conn) {
6ed58ec5
VT		 3003 int cnt, q;
3004
3005 switch (conn->type) {
3006 case ACL_LINK:
3007 cnt = hdev->acl_cnt;
3008 break;
3009 case SCO_LINK:
3010 case ESCO_LINK:
3011 cnt = hdev->sco_cnt;
3012 break;
3013 case LE_LINK:
3014 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3015 break;
3016 default:
3017 cnt = 0;
3018 BT_ERR("Unknown link type");
3019 }
3020
3021 q = cnt / num;
1da177e4
LT		 3022 *quote = q ? q : 1;
3023 } else
3024 *quote = 0;
3025
3026 BT_DBG("conn %p quote %d", conn, *quote);
3027 return conn;
3028}
3029
6039aa73 3030static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 3031{
3032 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3033 struct hci_conn *c;
1da177e4 3034
bae1f5d9 3035 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 3036
bf4c6325
GP		 3037 rcu_read_lock();
3038
1da177e4 3039 /* Kill stalled connections */
bf4c6325 3040 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 3041 if (c->type == type && c->sent) {
6ed93dc6
AE		 3042 BT_ERR("%s killing stalled connection %pMR",
3043 hdev->name, &c->dst);
bed71748 3044 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 3045 }
3046 }
bf4c6325
GP		 3047
3048 rcu_read_unlock();
1da177e4
LT		 3049}
3050
6039aa73
GP		 3051static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3052 int *quote)
1da177e4 3053{
73d80deb
LAD		 3054 struct hci_conn_hash *h = &hdev->conn_hash;
3055 struct hci_chan *chan = NULL;
abc5de8f 3056 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 3057 struct hci_conn *conn;
73d80deb
LAD		 3058 int cnt, q, conn_num = 0;
3059
3060 BT_DBG("%s", hdev->name);
3061
bf4c6325
GP		 3062 rcu_read_lock();
3063
3064 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 3065 struct hci_chan *tmp;
3066
3067 if (conn->type != type)
3068 continue;
3069
3070 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3071 continue;
3072
3073 conn_num++;
3074
8192edef 3075 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 3076 struct sk_buff *skb;
3077
3078 if (skb_queue_empty(&tmp->data_q))
3079 continue;
3080
3081 skb = skb_peek(&tmp->data_q);
3082 if (skb->priority < cur_prio)
3083 continue;
3084
3085 if (skb->priority > cur_prio) {
3086 num = 0;
3087 min = ~0;
3088 cur_prio = skb->priority;
3089 }
3090
3091 num++;
3092
3093 if (conn->sent < min) {
3094 min = conn->sent;
3095 chan = tmp;
3096 }
3097 }
3098
3099 if (hci_conn_num(hdev, type) == conn_num)
3100 break;
3101 }
3102
bf4c6325
GP		 3103 rcu_read_unlock();
3104
73d80deb
LAD		 3105 if (!chan)
3106 return NULL;
3107
3108 switch (chan->conn->type) {
3109 case ACL_LINK:
3110 cnt = hdev->acl_cnt;
3111 break;
bd1eb66b
AE		 3112 case AMP_LINK:
3113 cnt = hdev->block_cnt;
3114 break;
73d80deb
LAD		 3115 case SCO_LINK:
3116 case ESCO_LINK:
3117 cnt = hdev->sco_cnt;
3118 break;
3119 case LE_LINK:
3120 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3121 break;
3122 default:
3123 cnt = 0;
3124 BT_ERR("Unknown link type");
3125 }
3126
3127 q = cnt / num;
3128 *quote = q ? q : 1;
3129 BT_DBG("chan %p quote %d", chan, *quote);
3130 return chan;
3131}
3132
02b20f0b
LAD		 3133static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3134{
3135 struct hci_conn_hash *h = &hdev->conn_hash;
3136 struct hci_conn *conn;
3137 int num = 0;
3138
3139 BT_DBG("%s", hdev->name);
3140
bf4c6325
GP		 3141 rcu_read_lock();
3142
3143 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3144 struct hci_chan *chan;
3145
3146 if (conn->type != type)
3147 continue;
3148
3149 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3150 continue;
3151
3152 num++;
3153
8192edef 3154 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3155 struct sk_buff *skb;
3156
3157 if (chan->sent) {
3158 chan->sent = 0;
3159 continue;
3160 }
3161
3162 if (skb_queue_empty(&chan->data_q))
3163 continue;
3164
3165 skb = skb_peek(&chan->data_q);
3166 if (skb->priority >= HCI_PRIO_MAX - 1)
3167 continue;
3168
3169 skb->priority = HCI_PRIO_MAX - 1;
3170
3171 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3172 skb->priority);
02b20f0b
LAD		 3173 }
3174
3175 if (hci_conn_num(hdev, type) == num)
3176 break;
3177 }
bf4c6325
GP		 3178
3179 rcu_read_unlock();
3180
02b20f0b
LAD		 3181}
3182
b71d385a
AE		 3183static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3184{
3185 /* Calculate count of blocks used by this packet */
3186 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3187}
3188
6039aa73 3189static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3190{
1da177e4
LT		 3191 if (!test_bit(HCI_RAW, &hdev->flags)) {
3192 /* ACL tx timeout must be longer than maximum
3193 * link supervision timeout (40.9 seconds) */
63d2bc1b 3194 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3195 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3196 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3197 }
63d2bc1b 3198}
1da177e4 3199
6039aa73 3200static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3201{
3202 unsigned int cnt = hdev->acl_cnt;
3203 struct hci_chan *chan;
3204 struct sk_buff *skb;
3205 int quote;
3206
3207 __check_timeout(hdev, cnt);
04837f64 3208
73d80deb 3209 while (hdev->acl_cnt &&
a8c5fb1a 3210 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3211 u32 priority = (skb_peek(&chan->data_q))->priority;
3212 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3213 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3214 skb->len, skb->priority);
73d80deb 3215
ec1cce24
LAD		 3216 /* Stop if priority has changed */
3217 if (skb->priority < priority)
3218 break;
3219
3220 skb = skb_dequeue(&chan->data_q);
3221
73d80deb 3222 hci_conn_enter_active_mode(chan->conn,
04124681 3223 bt_cb(skb)->force_active);
04837f64 3224
57d17d70 3225 hci_send_frame(hdev, skb);
1da177e4
LT		 3226 hdev->acl_last_tx = jiffies;
3227
3228 hdev->acl_cnt--;
73d80deb
LAD		 3229 chan->sent++;
3230 chan->conn->sent++;
1da177e4
LT		 3231 }
3232 }
02b20f0b
LAD		 3233
3234 if (cnt != hdev->acl_cnt)
3235 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3236}
3237
6039aa73 3238static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3239{
63d2bc1b 3240 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3241 struct hci_chan *chan;
3242 struct sk_buff *skb;
3243 int quote;
bd1eb66b 3244 u8 type;
b71d385a 3245
63d2bc1b 3246 __check_timeout(hdev, cnt);
b71d385a 3247
bd1eb66b
AE		 3248 BT_DBG("%s", hdev->name);
3249
3250 if (hdev->dev_type == HCI_AMP)
3251 type = AMP_LINK;
3252 else
3253 type = ACL_LINK;
3254
b71d385a 3255 while (hdev->block_cnt > 0 &&
bd1eb66b 3256 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3257 u32 priority = (skb_peek(&chan->data_q))->priority;
3258 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3259 int blocks;
3260
3261 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3262 skb->len, skb->priority);
b71d385a
AE		 3263
3264 /* Stop if priority has changed */
3265 if (skb->priority < priority)
3266 break;
3267
3268 skb = skb_dequeue(&chan->data_q);
3269
3270 blocks = __get_blocks(hdev, skb);
3271 if (blocks > hdev->block_cnt)
3272 return;
3273
3274 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3275 bt_cb(skb)->force_active);
b71d385a 3276
57d17d70 3277 hci_send_frame(hdev, skb);
b71d385a
AE		 3278 hdev->acl_last_tx = jiffies;
3279
3280 hdev->block_cnt -= blocks;
3281 quote -= blocks;
3282
3283 chan->sent += blocks;
3284 chan->conn->sent += blocks;
3285 }
3286 }
3287
3288 if (cnt != hdev->block_cnt)
bd1eb66b 3289 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3290}
3291
6039aa73 3292static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3293{
3294 BT_DBG("%s", hdev->name);
3295
bd1eb66b
AE		 3296 /* No ACL link over BR/EDR controller */
3297 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3298 return;
3299
3300 /* No AMP link over AMP controller */
3301 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3302 return;
3303
3304 switch (hdev->flow_ctl_mode) {
3305 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3306 hci_sched_acl_pkt(hdev);
3307 break;
3308
3309 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3310 hci_sched_acl_blk(hdev);
3311 break;
3312 }
3313}
3314
1da177e4 3315/* Schedule SCO */
6039aa73 3316static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3317{
3318 struct hci_conn *conn;
3319 struct sk_buff *skb;
3320 int quote;
3321
3322 BT_DBG("%s", hdev->name);
3323
52087a79
LAD		 3324 if (!hci_conn_num(hdev, SCO_LINK))
3325 return;
3326
1da177e4
LT		 3327 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3328 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3329 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3330 hci_send_frame(hdev, skb);
1da177e4
LT		 3331
3332 conn->sent++;
3333 if (conn->sent == ~0)
3334 conn->sent = 0;
3335 }
3336 }
3337}
3338
6039aa73 3339static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3340{
3341 struct hci_conn *conn;
3342 struct sk_buff *skb;
3343 int quote;
3344
3345 BT_DBG("%s", hdev->name);
3346
52087a79
LAD		 3347 if (!hci_conn_num(hdev, ESCO_LINK))
3348 return;
3349
8fc9ced3
GP		 3350 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3351 &quote))) {
b6a0dc82
MH		 3352 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3353 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3354 hci_send_frame(hdev, skb);
b6a0dc82
MH		 3355
3356 conn->sent++;
3357 if (conn->sent == ~0)
3358 conn->sent = 0;
3359 }
3360 }
3361}
3362
6039aa73 3363static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3364{
73d80deb 3365 struct hci_chan *chan;
6ed58ec5 3366 struct sk_buff *skb;
02b20f0b 3367 int quote, cnt, tmp;
6ed58ec5
VT		 3368
3369 BT_DBG("%s", hdev->name);
3370
52087a79
LAD		 3371 if (!hci_conn_num(hdev, LE_LINK))
3372 return;
3373
6ed58ec5
VT		 3374 if (!test_bit(HCI_RAW, &hdev->flags)) {
3375 /* LE tx timeout must be longer than maximum
3376 * link supervision timeout (40.9 seconds) */
bae1f5d9 3377 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3378 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3379 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3380 }
3381
3382 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3383 tmp = cnt;
73d80deb 3384 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3385 u32 priority = (skb_peek(&chan->data_q))->priority;
3386 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3387 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3388 skb->len, skb->priority);
6ed58ec5 3389
ec1cce24
LAD		 3390 /* Stop if priority has changed */
3391 if (skb->priority < priority)
3392 break;
3393
3394 skb = skb_dequeue(&chan->data_q);
3395
57d17d70 3396 hci_send_frame(hdev, skb);
6ed58ec5
VT		 3397 hdev->le_last_tx = jiffies;
3398
3399 cnt--;
73d80deb
LAD		 3400 chan->sent++;
3401 chan->conn->sent++;
6ed58ec5
VT		 3402 }
3403 }
73d80deb 3404
6ed58ec5
VT		 3405 if (hdev->le_pkts)
3406 hdev->le_cnt = cnt;
3407 else
3408 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3409
3410 if (cnt != tmp)
3411 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3412}
3413
3eff45ea 3414static void hci_tx_work(struct work_struct *work)
1da177e4 3415{
3eff45ea 3416 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3417 struct sk_buff *skb;
3418
6ed58ec5 3419 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3420 hdev->sco_cnt, hdev->le_cnt);
1da177e4 3421
52de599e
MH		 3422 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
3423 /* Schedule queues and send stuff to HCI driver */
3424 hci_sched_acl(hdev);
3425 hci_sched_sco(hdev);
3426 hci_sched_esco(hdev);
3427 hci_sched_le(hdev);
3428 }
6ed58ec5 3429
1da177e4
LT		 3430 /* Send next queued raw (unknown type) packet */
3431 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 3432 hci_send_frame(hdev, skb);
1da177e4
LT		 3433}
3434
25985edc 3435/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3436
3437/* ACL data packet */
6039aa73 3438static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3439{
3440 struct hci_acl_hdr *hdr = (void *) skb->data;
3441 struct hci_conn *conn;
3442 __u16 handle, flags;
3443
3444 skb_pull(skb, HCI_ACL_HDR_SIZE);
3445
3446 handle = __le16_to_cpu(hdr->handle);
3447 flags = hci_flags(handle);
3448 handle = hci_handle(handle);
3449
f0e09510 3450 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3451 handle, flags);
1da177e4
LT		 3452
3453 hdev->stat.acl_rx++;
3454
3455 hci_dev_lock(hdev);
3456 conn = hci_conn_hash_lookup_handle(hdev, handle);
3457 hci_dev_unlock(hdev);
8e87d142 3458
1da177e4 3459 if (conn) {
65983fc7 3460 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3461
1da177e4 3462 /* Send to upper protocol */
686ebf28
UF		 3463 l2cap_recv_acldata(conn, skb, flags);
3464 return;
1da177e4 3465 } else {
8e87d142 3466 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3467 hdev->name, handle);
1da177e4
LT		 3468 }
3469
3470 kfree_skb(skb);
3471}
3472
3473/* SCO data packet */
6039aa73 3474static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3475{
3476 struct hci_sco_hdr *hdr = (void *) skb->data;
3477 struct hci_conn *conn;
3478 __u16 handle;
3479
3480 skb_pull(skb, HCI_SCO_HDR_SIZE);
3481
3482 handle = __le16_to_cpu(hdr->handle);
3483
f0e09510 3484 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3485
3486 hdev->stat.sco_rx++;
3487
3488 hci_dev_lock(hdev);
3489 conn = hci_conn_hash_lookup_handle(hdev, handle);
3490 hci_dev_unlock(hdev);
3491
3492 if (conn) {
1da177e4 3493 /* Send to upper protocol */
686ebf28
UF		 3494 sco_recv_scodata(conn, skb);
3495 return;
1da177e4 3496 } else {
8e87d142 3497 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3498 hdev->name, handle);
1da177e4
LT		 3499 }
3500
3501 kfree_skb(skb);
3502}
3503
9238f36a
JH		 3504static bool hci_req_is_complete(struct hci_dev *hdev)
3505{
3506 struct sk_buff *skb;
3507
3508 skb = skb_peek(&hdev->cmd_q);
3509 if (!skb)
3510 return true;
3511
3512 return bt_cb(skb)->req.start;
3513}
3514
42c6b129
JH		 3515static void hci_resend_last(struct hci_dev *hdev)
3516{
3517 struct hci_command_hdr *sent;
3518 struct sk_buff *skb;
3519 u16 opcode;
3520
3521 if (!hdev->sent_cmd)
3522 return;
3523
3524 sent = (void *) hdev->sent_cmd->data;
3525 opcode = __le16_to_cpu(sent->opcode);
3526 if (opcode == HCI_OP_RESET)
3527 return;
3528
3529 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3530 if (!skb)
3531 return;
3532
3533 skb_queue_head(&hdev->cmd_q, skb);
3534 queue_work(hdev->workqueue, &hdev->cmd_work);
3535}
3536
9238f36a
JH		 3537void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3538{
3539 hci_req_complete_t req_complete = NULL;
3540 struct sk_buff *skb;
3541 unsigned long flags;
3542
3543 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3544
42c6b129
JH		 3545 /* If the completed command doesn't match the last one that was
3546 * sent we need to do special handling of it.
9238f36a 3547 */
42c6b129
JH		 3548 if (!hci_sent_cmd_data(hdev, opcode)) {
3549 /* Some CSR based controllers generate a spontaneous
3550 * reset complete event during init and any pending
3551 * command will never be completed. In such a case we
3552 * need to resend whatever was the last sent
3553 * command.
3554 */
3555 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3556 hci_resend_last(hdev);
3557
9238f36a 3558 return;
42c6b129 3559 }
9238f36a
JH		 3560
3561 /* If the command succeeded and there's still more commands in
3562 * this request the request is not yet complete.
3563 */
3564 if (!status && !hci_req_is_complete(hdev))
3565 return;
3566
3567 /* If this was the last command in a request the complete
3568 * callback would be found in hdev->sent_cmd instead of the
3569 * command queue (hdev->cmd_q).
3570 */
3571 if (hdev->sent_cmd) {
3572 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 3573
3574 if (req_complete) {
3575 /* We must set the complete callback to NULL to
3576 * avoid calling the callback more than once if
3577 * this function gets called again.
3578 */
3579 bt_cb(hdev->sent_cmd)->req.complete = NULL;
3580
9238f36a 3581 goto call_complete;
53e21fbc 3582 }
9238f36a
JH		 3583 }
3584
3585 /* Remove all pending commands belonging to this request */
3586 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3587 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3588 if (bt_cb(skb)->req.start) {
3589 __skb_queue_head(&hdev->cmd_q, skb);
3590 break;
3591 }
3592
3593 req_complete = bt_cb(skb)->req.complete;
3594 kfree_skb(skb);
3595 }
3596 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3597
3598call_complete:
3599 if (req_complete)
3600 req_complete(hdev, status);
3601}
3602
b78752cc 3603static void hci_rx_work(struct work_struct *work)
1da177e4 3604{
b78752cc 3605 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3606 struct sk_buff *skb;
3607
3608 BT_DBG("%s", hdev->name);
3609
1da177e4 3610 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3611 /* Send copy to monitor */
3612 hci_send_to_monitor(hdev, skb);
3613
1da177e4
LT		 3614 if (atomic_read(&hdev->promisc)) {
3615 /* Send copy to the sockets */
470fe1b5 3616 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3617 }
3618
0736cfa8
MH		 3619 if (test_bit(HCI_RAW, &hdev->flags) ||
3620 test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1da177e4
LT		 3621 kfree_skb(skb);
3622 continue;
3623 }
3624
3625 if (test_bit(HCI_INIT, &hdev->flags)) {
3626 /* Don't process data packets in this states. */
0d48d939 3627 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3628 case HCI_ACLDATA_PKT:
3629 case HCI_SCODATA_PKT:
3630 kfree_skb(skb);
3631 continue;
3ff50b79 3632 }
1da177e4
LT		 3633 }
3634
3635 /* Process frame */
0d48d939 3636 switch (bt_cb(skb)->pkt_type) {
1da177e4 3637 case HCI_EVENT_PKT:
b78752cc 3638 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3639 hci_event_packet(hdev, skb);
3640 break;
3641
3642 case HCI_ACLDATA_PKT:
3643 BT_DBG("%s ACL data packet", hdev->name);
3644 hci_acldata_packet(hdev, skb);
3645 break;
3646
3647 case HCI_SCODATA_PKT:
3648 BT_DBG("%s SCO data packet", hdev->name);
3649 hci_scodata_packet(hdev, skb);
3650 break;
3651
3652 default:
3653 kfree_skb(skb);
3654 break;
3655 }
3656 }
1da177e4
LT		 3657}
3658
c347b765 3659static void hci_cmd_work(struct work_struct *work)
1da177e4 3660{
c347b765 3661 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3662 struct sk_buff *skb;
3663
2104786b
AE		 3664 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3665 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3666
1da177e4 3667 /* Send queued commands */
5a08ecce
AE		 3668 if (atomic_read(&hdev->cmd_cnt)) {
3669 skb = skb_dequeue(&hdev->cmd_q);
3670 if (!skb)
3671 return;
3672
7585b97a 3673 kfree_skb(hdev->sent_cmd);
1da177e4 3674
a675d7f1 3675 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 3676 if (hdev->sent_cmd) {
1da177e4 3677 atomic_dec(&hdev->cmd_cnt);
57d17d70 3678 hci_send_frame(hdev, skb);
7bdb8a5c
SJ		 3679 if (test_bit(HCI_RESET, &hdev->flags))
3680 del_timer(&hdev->cmd_timer);
3681 else
3682 mod_timer(&hdev->cmd_timer,
5f246e89 3683 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3684 } else {
3685 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3686 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3687 }
3688 }
3689}
2519a1fc 3690
31f7956c
AG		 3691u8 bdaddr_to_le(u8 bdaddr_type)
3692{
3693 switch (bdaddr_type) {
3694 case BDADDR_LE_PUBLIC:
3695 return ADDR_LE_DEV_PUBLIC;
3696
3697 default:
3698 /* Fallback to LE Random address type */
3699 return ADDR_LE_DEV_RANDOM;
3700 }
3701}
Linux 6.x block layer and io_uring tree(s)