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Bluetooth: Add support for Atheros [0cf3:e003]
[deliverable/linux.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
1da177e4 30
8c520a59 31#include <linux/rfkill.h>
1da177e4
LT		 32
33#include <net/bluetooth/bluetooth.h>
34#include <net/bluetooth/hci_core.h>
35
b78752cc 36static void hci_rx_work(struct work_struct *work);
c347b765 37static void hci_cmd_work(struct work_struct *work);
3eff45ea 38static void hci_tx_work(struct work_struct *work);
1da177e4 39
1da177e4
LT		 40/* HCI device list */
41LIST_HEAD(hci_dev_list);
42DEFINE_RWLOCK(hci_dev_list_lock);
43
44/* HCI callback list */
45LIST_HEAD(hci_cb_list);
46DEFINE_RWLOCK(hci_cb_list_lock);
47
3df92b31
SL		 48/* HCI ID Numbering */
49static DEFINE_IDA(hci_index_ida);
50
1da177e4
LT		 51/* ---- HCI notifications ---- */
52
6516455d 53static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 54{
040030ef 55 hci_sock_dev_event(hdev, event);
1da177e4
LT		 56}
57
58/* ---- HCI requests ---- */
59
42c6b129 60static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1da177e4 61{
42c6b129 62 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT		 63
64 if (hdev->req_status == HCI_REQ_PEND) {
65 hdev->req_result = result;
66 hdev->req_status = HCI_REQ_DONE;
67 wake_up_interruptible(&hdev->req_wait_q);
68 }
69}
70
71static void hci_req_cancel(struct hci_dev *hdev, int err)
72{
73 BT_DBG("%s err 0x%2.2x", hdev->name, err);
74
75 if (hdev->req_status == HCI_REQ_PEND) {
76 hdev->req_result = err;
77 hdev->req_status = HCI_REQ_CANCELED;
78 wake_up_interruptible(&hdev->req_wait_q);
79 }
80}
81
77a63e0a
FW		 82static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
83 u8 event)
75e84b7c
JH		 84{
85 struct hci_ev_cmd_complete *ev;
86 struct hci_event_hdr *hdr;
87 struct sk_buff *skb;
88
89 hci_dev_lock(hdev);
90
91 skb = hdev->recv_evt;
92 hdev->recv_evt = NULL;
93
94 hci_dev_unlock(hdev);
95
96 if (!skb)
97 return ERR_PTR(-ENODATA);
98
99 if (skb->len < sizeof(*hdr)) {
100 BT_ERR("Too short HCI event");
101 goto failed;
102 }
103
104 hdr = (void *) skb->data;
105 skb_pull(skb, HCI_EVENT_HDR_SIZE);
106
7b1abbbe
JH		 107 if (event) {
108 if (hdr->evt != event)
109 goto failed;
110 return skb;
111 }
112
75e84b7c
JH		 113 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
114 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
115 goto failed;
116 }
117
118 if (skb->len < sizeof(*ev)) {
119 BT_ERR("Too short cmd_complete event");
120 goto failed;
121 }
122
123 ev = (void *) skb->data;
124 skb_pull(skb, sizeof(*ev));
125
126 if (opcode == __le16_to_cpu(ev->opcode))
127 return skb;
128
129 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
130 __le16_to_cpu(ev->opcode));
131
132failed:
133 kfree_skb(skb);
134 return ERR_PTR(-ENODATA);
135}
136
7b1abbbe 137struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 138 const void *param, u8 event, u32 timeout)
75e84b7c
JH		 139{
140 DECLARE_WAITQUEUE(wait, current);
141 struct hci_request req;
142 int err = 0;
143
144 BT_DBG("%s", hdev->name);
145
146 hci_req_init(&req, hdev);
147
7b1abbbe 148 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH		 149
150 hdev->req_status = HCI_REQ_PEND;
151
152 err = hci_req_run(&req, hci_req_sync_complete);
153 if (err < 0)
154 return ERR_PTR(err);
155
156 add_wait_queue(&hdev->req_wait_q, &wait);
157 set_current_state(TASK_INTERRUPTIBLE);
158
159 schedule_timeout(timeout);
160
161 remove_wait_queue(&hdev->req_wait_q, &wait);
162
163 if (signal_pending(current))
164 return ERR_PTR(-EINTR);
165
166 switch (hdev->req_status) {
167 case HCI_REQ_DONE:
168 err = -bt_to_errno(hdev->req_result);
169 break;
170
171 case HCI_REQ_CANCELED:
172 err = -hdev->req_result;
173 break;
174
175 default:
176 err = -ETIMEDOUT;
177 break;
178 }
179
180 hdev->req_status = hdev->req_result = 0;
181
182 BT_DBG("%s end: err %d", hdev->name, err);
183
184 if (err < 0)
185 return ERR_PTR(err);
186
7b1abbbe
JH		 187 return hci_get_cmd_complete(hdev, opcode, event);
188}
189EXPORT_SYMBOL(__hci_cmd_sync_ev);
190
191struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 192 const void *param, u32 timeout)
7b1abbbe
JH		 193{
194 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH		 195}
196EXPORT_SYMBOL(__hci_cmd_sync);
197
1da177e4 198/* Execute request and wait for completion. */
01178cd4 199static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 200 void (*func)(struct hci_request *req,
201 unsigned long opt),
01178cd4 202 unsigned long opt, __u32 timeout)
1da177e4 203{
42c6b129 204 struct hci_request req;
1da177e4
LT		 205 DECLARE_WAITQUEUE(wait, current);
206 int err = 0;
207
208 BT_DBG("%s start", hdev->name);
209
42c6b129
JH		 210 hci_req_init(&req, hdev);
211
1da177e4
LT		 212 hdev->req_status = HCI_REQ_PEND;
213
42c6b129 214 func(&req, opt);
53cce22d 215
42c6b129
JH		 216 err = hci_req_run(&req, hci_req_sync_complete);
217 if (err < 0) {
53cce22d 218 hdev->req_status = 0;
920c8300
AG		 219
220 /* ENODATA means the HCI request command queue is empty.
221 * This can happen when a request with conditionals doesn't
222 * trigger any commands to be sent. This is normal behavior
223 * and should not trigger an error return.
42c6b129 224 */
920c8300
AG		 225 if (err == -ENODATA)
226 return 0;
227
228 return err;
53cce22d
JH		 229 }
230
bc4445c7
AG		 231 add_wait_queue(&hdev->req_wait_q, &wait);
232 set_current_state(TASK_INTERRUPTIBLE);
233
1da177e4
LT		 234 schedule_timeout(timeout);
235
236 remove_wait_queue(&hdev->req_wait_q, &wait);
237
238 if (signal_pending(current))
239 return -EINTR;
240
241 switch (hdev->req_status) {
242 case HCI_REQ_DONE:
e175072f 243 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 244 break;
245
246 case HCI_REQ_CANCELED:
247 err = -hdev->req_result;
248 break;
249
250 default:
251 err = -ETIMEDOUT;
252 break;
3ff50b79 253 }
1da177e4 254
a5040efa 255 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 256
257 BT_DBG("%s end: err %d", hdev->name, err);
258
259 return err;
260}
261
01178cd4 262static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 263 void (*req)(struct hci_request *req,
264 unsigned long opt),
01178cd4 265 unsigned long opt, __u32 timeout)
1da177e4
LT		 266{
267 int ret;
268
7c6a329e
MH		 269 if (!test_bit(HCI_UP, &hdev->flags))
270 return -ENETDOWN;
271
1da177e4
LT		 272 /* Serialize all requests */
273 hci_req_lock(hdev);
01178cd4 274 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 275 hci_req_unlock(hdev);
276
277 return ret;
278}
279
42c6b129 280static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 281{
42c6b129 282 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 283
284 /* Reset device */
42c6b129
JH		 285 set_bit(HCI_RESET, &req->hdev->flags);
286 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 287}
288
42c6b129 289static void bredr_init(struct hci_request *req)
1da177e4 290{
42c6b129 291 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 292
1da177e4 293 /* Read Local Supported Features */
42c6b129 294 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 295
1143e5a6 296 /* Read Local Version */
42c6b129 297 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 298
299 /* Read BD Address */
42c6b129 300 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 301}
302
42c6b129 303static void amp_init(struct hci_request *req)
e61ef499 304{
42c6b129 305 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 306
e61ef499 307 /* Read Local Version */
42c6b129 308 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 309
310 /* Read Local AMP Info */
42c6b129 311 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 312
313 /* Read Data Blk size */
42c6b129 314 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
e61ef499
AE		 315}
316
42c6b129 317static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 318{
42c6b129 319 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 320
321 BT_DBG("%s %ld", hdev->name, opt);
322
11778716
AE		 323 /* Reset */
324 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 325 hci_reset_req(req, 0);
11778716 326
e61ef499
AE		 327 switch (hdev->dev_type) {
328 case HCI_BREDR:
42c6b129 329 bredr_init(req);
e61ef499
AE		 330 break;
331
332 case HCI_AMP:
42c6b129 333 amp_init(req);
e61ef499
AE		 334 break;
335
336 default:
337 BT_ERR("Unknown device type %d", hdev->dev_type);
338 break;
339 }
e61ef499
AE		 340}
341
42c6b129 342static void bredr_setup(struct hci_request *req)
2177bab5 343{
2177bab5
JH		 344 __le16 param;
345 __u8 flt_type;
346
347 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 348 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 349
350 /* Read Class of Device */
42c6b129 351 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 352
353 /* Read Local Name */
42c6b129 354 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 355
356 /* Read Voice Setting */
42c6b129 357 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5
JH		 358
359 /* Clear Event Filters */
360 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 361 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 362
363 /* Connection accept timeout ~20 secs */
364 param = __constant_cpu_to_le16(0x7d00);
42c6b129 365 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 366
f332ec66
JH		 367 /* Read page scan parameters */
368 if (req->hdev->hci_ver > BLUETOOTH_VER_1_1) {
369 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
370 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
371 }
2177bab5
JH		 372}
373
42c6b129 374static void le_setup(struct hci_request *req)
2177bab5 375{
c73eee91
JH		 376 struct hci_dev *hdev = req->hdev;
377
2177bab5 378 /* Read LE Buffer Size */
42c6b129 379 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 380
381 /* Read LE Local Supported Features */
42c6b129 382 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5
JH		 383
384 /* Read LE Advertising Channel TX Power */
42c6b129 385 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH		 386
387 /* Read LE White List Size */
42c6b129 388 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5
JH		 389
390 /* Read LE Supported States */
42c6b129 391 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
c73eee91
JH		 392
393 /* LE-only controllers have LE implicitly enabled */
394 if (!lmp_bredr_capable(hdev))
395 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 396}
397
398static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
399{
400 if (lmp_ext_inq_capable(hdev))
401 return 0x02;
402
403 if (lmp_inq_rssi_capable(hdev))
404 return 0x01;
405
406 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
407 hdev->lmp_subver == 0x0757)
408 return 0x01;
409
410 if (hdev->manufacturer == 15) {
411 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
412 return 0x01;
413 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
414 return 0x01;
415 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
416 return 0x01;
417 }
418
419 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
420 hdev->lmp_subver == 0x1805)
421 return 0x01;
422
423 return 0x00;
424}
425
42c6b129 426static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 427{
428 u8 mode;
429
42c6b129 430 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 431
42c6b129 432 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 433}
434
42c6b129 435static void hci_setup_event_mask(struct hci_request *req)
2177bab5 436{
42c6b129
JH		 437 struct hci_dev *hdev = req->hdev;
438
2177bab5
JH		 439 /* The second byte is 0xff instead of 0x9f (two reserved bits
440 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
441 * command otherwise.
442 */
443 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
444
445 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
446 * any event mask for pre 1.2 devices.
447 */
448 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
449 return;
450
451 if (lmp_bredr_capable(hdev)) {
452 events[4] |= 0x01; /* Flow Specification Complete */
453 events[4] |= 0x02; /* Inquiry Result with RSSI */
454 events[4] |= 0x04; /* Read Remote Extended Features Complete */
455 events[5] |= 0x08; /* Synchronous Connection Complete */
456 events[5] |= 0x10; /* Synchronous Connection Changed */
457 }
458
459 if (lmp_inq_rssi_capable(hdev))
460 events[4] |= 0x02; /* Inquiry Result with RSSI */
461
462 if (lmp_sniffsubr_capable(hdev))
463 events[5] |= 0x20; /* Sniff Subrating */
464
465 if (lmp_pause_enc_capable(hdev))
466 events[5] |= 0x80; /* Encryption Key Refresh Complete */
467
468 if (lmp_ext_inq_capable(hdev))
469 events[5] |= 0x40; /* Extended Inquiry Result */
470
471 if (lmp_no_flush_capable(hdev))
472 events[7] |= 0x01; /* Enhanced Flush Complete */
473
474 if (lmp_lsto_capable(hdev))
475 events[6] |= 0x80; /* Link Supervision Timeout Changed */
476
477 if (lmp_ssp_capable(hdev)) {
478 events[6] |= 0x01; /* IO Capability Request */
479 events[6] |= 0x02; /* IO Capability Response */
480 events[6] |= 0x04; /* User Confirmation Request */
481 events[6] |= 0x08; /* User Passkey Request */
482 events[6] |= 0x10; /* Remote OOB Data Request */
483 events[6] |= 0x20; /* Simple Pairing Complete */
484 events[7] |= 0x04; /* User Passkey Notification */
485 events[7] |= 0x08; /* Keypress Notification */
486 events[7] |= 0x10; /* Remote Host Supported
487 * Features Notification
488 */
489 }
490
491 if (lmp_le_capable(hdev))
492 events[7] |= 0x20; /* LE Meta-Event */
493
42c6b129 494 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 495
496 if (lmp_le_capable(hdev)) {
497 memset(events, 0, sizeof(events));
498 events[0] = 0x1f;
42c6b129
JH		 499 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
500 sizeof(events), events);
2177bab5
JH		 501 }
502}
503
42c6b129 504static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 505{
42c6b129
JH		 506 struct hci_dev *hdev = req->hdev;
507
2177bab5 508 if (lmp_bredr_capable(hdev))
42c6b129 509 bredr_setup(req);
2177bab5
JH		 510
511 if (lmp_le_capable(hdev))
42c6b129 512 le_setup(req);
2177bab5 513
42c6b129 514 hci_setup_event_mask(req);
2177bab5
JH		 515
516 if (hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 517 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 518
519 if (lmp_ssp_capable(hdev)) {
520 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
521 u8 mode = 0x01;
42c6b129
JH		 522 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
523 sizeof(mode), &mode);
2177bab5
JH		 524 } else {
525 struct hci_cp_write_eir cp;
526
527 memset(hdev->eir, 0, sizeof(hdev->eir));
528 memset(&cp, 0, sizeof(cp));
529
42c6b129 530 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 531 }
532 }
533
534 if (lmp_inq_rssi_capable(hdev))
42c6b129 535 hci_setup_inquiry_mode(req);
2177bab5
JH		 536
537 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 538 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 539
540 if (lmp_ext_feat_capable(hdev)) {
541 struct hci_cp_read_local_ext_features cp;
542
543 cp.page = 0x01;
42c6b129
JH		 544 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
545 sizeof(cp), &cp);
2177bab5
JH		 546 }
547
548 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
549 u8 enable = 1;
42c6b129
JH		 550 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
551 &enable);
2177bab5
JH		 552 }
553}
554
42c6b129 555static void hci_setup_link_policy(struct hci_request *req)
2177bab5 556{
42c6b129 557 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 558 struct hci_cp_write_def_link_policy cp;
559 u16 link_policy = 0;
560
561 if (lmp_rswitch_capable(hdev))
562 link_policy |= HCI_LP_RSWITCH;
563 if (lmp_hold_capable(hdev))
564 link_policy |= HCI_LP_HOLD;
565 if (lmp_sniff_capable(hdev))
566 link_policy |= HCI_LP_SNIFF;
567 if (lmp_park_capable(hdev))
568 link_policy |= HCI_LP_PARK;
569
570 cp.policy = cpu_to_le16(link_policy);
42c6b129 571 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 572}
573
42c6b129 574static void hci_set_le_support(struct hci_request *req)
2177bab5 575{
42c6b129 576 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 577 struct hci_cp_write_le_host_supported cp;
578
c73eee91
JH		 579 /* LE-only devices do not support explicit enablement */
580 if (!lmp_bredr_capable(hdev))
581 return;
582
2177bab5
JH		 583 memset(&cp, 0, sizeof(cp));
584
585 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
586 cp.le = 0x01;
587 cp.simul = lmp_le_br_capable(hdev);
588 }
589
590 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 591 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
592 &cp);
2177bab5
JH		 593}
594
42c6b129 595static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 596{
42c6b129 597 struct hci_dev *hdev = req->hdev;
d2c5d77f 598 u8 p;
42c6b129 599
59f45d57
JH		 600 /* Only send HCI_Delete_Stored_Link_Key if it is supported */
601 if (hdev->commands[6] & 0x80) {
602 struct hci_cp_delete_stored_link_key cp;
603
604 bacpy(&cp.bdaddr, BDADDR_ANY);
605 cp.delete_all = 0x01;
606 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
607 sizeof(cp), &cp);
608 }
609
2177bab5 610 if (hdev->commands[5] & 0x10)
42c6b129 611 hci_setup_link_policy(req);
2177bab5 612
04b4edcb 613 if (lmp_le_capable(hdev)) {
42c6b129 614 hci_set_le_support(req);
04b4edcb
JH		 615 hci_update_ad(req);
616 }
d2c5d77f
JH		 617
618 /* Read features beyond page 1 if available */
619 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
620 struct hci_cp_read_local_ext_features cp;
621
622 cp.page = p;
623 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
624 sizeof(cp), &cp);
625 }
2177bab5
JH		 626}
627
628static int __hci_init(struct hci_dev *hdev)
629{
630 int err;
631
632 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
633 if (err < 0)
634 return err;
635
636 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
637 * BR/EDR/LE type controllers. AMP controllers only need the
638 * first stage init.
639 */
640 if (hdev->dev_type != HCI_BREDR)
641 return 0;
642
643 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
644 if (err < 0)
645 return err;
646
647 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
648}
649
42c6b129 650static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 651{
652 __u8 scan = opt;
653
42c6b129 654 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 655
656 /* Inquiry and Page scans */
42c6b129 657 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 658}
659
42c6b129 660static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 661{
662 __u8 auth = opt;
663
42c6b129 664 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 665
666 /* Authentication */
42c6b129 667 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 668}
669
42c6b129 670static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 671{
672 __u8 encrypt = opt;
673
42c6b129 674 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 675
e4e8e37c 676 /* Encryption */
42c6b129 677 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 678}
679
42c6b129 680static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 681{
682 __le16 policy = cpu_to_le16(opt);
683
42c6b129 684 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 685
686 /* Default link policy */
42c6b129 687 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 688}
689
8e87d142 690/* Get HCI device by index.
1da177e4
LT		 691 * Device is held on return. */
692struct hci_dev *hci_dev_get(int index)
693{
8035ded4 694 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 695
696 BT_DBG("%d", index);
697
698 if (index < 0)
699 return NULL;
700
701 read_lock(&hci_dev_list_lock);
8035ded4 702 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 703 if (d->id == index) {
704 hdev = hci_dev_hold(d);
705 break;
706 }
707 }
708 read_unlock(&hci_dev_list_lock);
709 return hdev;
710}
1da177e4
LT		 711
712/* ---- Inquiry support ---- */
ff9ef578 713
30dc78e1
JH		 714bool hci_discovery_active(struct hci_dev *hdev)
715{
716 struct discovery_state *discov = &hdev->discovery;
717
6fbe195d 718 switch (discov->state) {
343f935b 719 case DISCOVERY_FINDING:
6fbe195d 720 case DISCOVERY_RESOLVING:
30dc78e1
JH		 721 return true;
722
6fbe195d
AG		 723 default:
724 return false;
725 }
30dc78e1
JH		 726}
727
ff9ef578
JH		 728void hci_discovery_set_state(struct hci_dev *hdev, int state)
729{
730 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
731
732 if (hdev->discovery.state == state)
733 return;
734
735 switch (state) {
736 case DISCOVERY_STOPPED:
7b99b659
AG		 737 if (hdev->discovery.state != DISCOVERY_STARTING)
738 mgmt_discovering(hdev, 0);
ff9ef578
JH		 739 break;
740 case DISCOVERY_STARTING:
741 break;
343f935b 742 case DISCOVERY_FINDING:
ff9ef578
JH		 743 mgmt_discovering(hdev, 1);
744 break;
30dc78e1
JH		 745 case DISCOVERY_RESOLVING:
746 break;
ff9ef578
JH		 747 case DISCOVERY_STOPPING:
748 break;
749 }
750
751 hdev->discovery.state = state;
752}
753
1da177e4
LT		 754static void inquiry_cache_flush(struct hci_dev *hdev)
755{
30883512 756 struct discovery_state *cache = &hdev->discovery;
b57c1a56 757 struct inquiry_entry *p, *n;
1da177e4 758
561aafbc
JH		 759 list_for_each_entry_safe(p, n, &cache->all, all) {
760 list_del(&p->all);
b57c1a56 761 kfree(p);
1da177e4 762 }
561aafbc
JH		 763
764 INIT_LIST_HEAD(&cache->unknown);
765 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 766}
767
a8c5fb1a
GP		 768struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
769 bdaddr_t *bdaddr)
1da177e4 770{
30883512 771 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 772 struct inquiry_entry *e;
773
6ed93dc6 774 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 775
561aafbc
JH		 776 list_for_each_entry(e, &cache->all, all) {
777 if (!bacmp(&e->data.bdaddr, bdaddr))
778 return e;
779 }
780
781 return NULL;
782}
783
784struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 785 bdaddr_t *bdaddr)
561aafbc 786{
30883512 787 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 788 struct inquiry_entry *e;
789
6ed93dc6 790 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 791
792 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 793 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 794 return e;
795 }
796
797 return NULL;
1da177e4
LT		 798}
799
30dc78e1 800struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 801 bdaddr_t *bdaddr,
802 int state)
30dc78e1
JH		 803{
804 struct discovery_state *cache = &hdev->discovery;
805 struct inquiry_entry *e;
806
6ed93dc6 807 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 808
809 list_for_each_entry(e, &cache->resolve, list) {
810 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
811 return e;
812 if (!bacmp(&e->data.bdaddr, bdaddr))
813 return e;
814 }
815
816 return NULL;
817}
818
a3d4e20a 819void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 820 struct inquiry_entry *ie)
a3d4e20a
JH		 821{
822 struct discovery_state *cache = &hdev->discovery;
823 struct list_head *pos = &cache->resolve;
824 struct inquiry_entry *p;
825
826 list_del(&ie->list);
827
828 list_for_each_entry(p, &cache->resolve, list) {
829 if (p->name_state != NAME_PENDING &&
a8c5fb1a 830 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 831 break;
832 pos = &p->list;
833 }
834
835 list_add(&ie->list, pos);
836}
837
3175405b 838bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 839 bool name_known, bool *ssp)
1da177e4 840{
30883512 841 struct discovery_state *cache = &hdev->discovery;
70f23020 842 struct inquiry_entry *ie;
1da177e4 843
6ed93dc6 844 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 845
2b2fec4d
SJ		 846 hci_remove_remote_oob_data(hdev, &data->bdaddr);
847
388fc8fa
JH		 848 if (ssp)
849 *ssp = data->ssp_mode;
850
70f23020 851 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 852 if (ie) {
388fc8fa
JH		 853 if (ie->data.ssp_mode && ssp)
854 *ssp = true;
855
a3d4e20a 856 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 857 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 858 ie->data.rssi = data->rssi;
859 hci_inquiry_cache_update_resolve(hdev, ie);
860 }
861
561aafbc 862 goto update;
a3d4e20a 863 }
561aafbc
JH		 864
865 /* Entry not in the cache. Add new one. */
866 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
867 if (!ie)
3175405b 868 return false;
561aafbc
JH		 869
870 list_add(&ie->all, &cache->all);
871
872 if (name_known) {
873 ie->name_state = NAME_KNOWN;
874 } else {
875 ie->name_state = NAME_NOT_KNOWN;
876 list_add(&ie->list, &cache->unknown);
877 }
70f23020 878
561aafbc
JH		 879update:
880 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 881 ie->name_state != NAME_PENDING) {
561aafbc
JH		 882 ie->name_state = NAME_KNOWN;
883 list_del(&ie->list);
1da177e4
LT		 884 }
885
70f23020
AE		 886 memcpy(&ie->data, data, sizeof(*data));
887 ie->timestamp = jiffies;
1da177e4 888 cache->timestamp = jiffies;
3175405b
JH		 889
890 if (ie->name_state == NAME_NOT_KNOWN)
891 return false;
892
893 return true;
1da177e4
LT		 894}
895
896static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
897{
30883512 898 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 899 struct inquiry_info *info = (struct inquiry_info *) buf;
900 struct inquiry_entry *e;
901 int copied = 0;
902
561aafbc 903 list_for_each_entry(e, &cache->all, all) {
1da177e4 904 struct inquiry_data *data = &e->data;
b57c1a56
JH		 905
906 if (copied >= num)
907 break;
908
1da177e4
LT		 909 bacpy(&info->bdaddr, &data->bdaddr);
910 info->pscan_rep_mode = data->pscan_rep_mode;
911 info->pscan_period_mode = data->pscan_period_mode;
912 info->pscan_mode = data->pscan_mode;
913 memcpy(info->dev_class, data->dev_class, 3);
914 info->clock_offset = data->clock_offset;
b57c1a56 915
1da177e4 916 info++;
b57c1a56 917 copied++;
1da177e4
LT		 918 }
919
920 BT_DBG("cache %p, copied %d", cache, copied);
921 return copied;
922}
923
42c6b129 924static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 925{
926 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 927 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 928 struct hci_cp_inquiry cp;
929
930 BT_DBG("%s", hdev->name);
931
932 if (test_bit(HCI_INQUIRY, &hdev->flags))
933 return;
934
935 /* Start Inquiry */
936 memcpy(&cp.lap, &ir->lap, 3);
937 cp.length = ir->length;
938 cp.num_rsp = ir->num_rsp;
42c6b129 939 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 940}
941
3e13fa1e
AG		 942static int wait_inquiry(void *word)
943{
944 schedule();
945 return signal_pending(current);
946}
947
1da177e4
LT		 948int hci_inquiry(void __user *arg)
949{
950 __u8 __user *ptr = arg;
951 struct hci_inquiry_req ir;
952 struct hci_dev *hdev;
953 int err = 0, do_inquiry = 0, max_rsp;
954 long timeo;
955 __u8 *buf;
956
957 if (copy_from_user(&ir, ptr, sizeof(ir)))
958 return -EFAULT;
959
5a08ecce
AE		 960 hdev = hci_dev_get(ir.dev_id);
961 if (!hdev)
1da177e4
LT		 962 return -ENODEV;
963
09fd0de5 964 hci_dev_lock(hdev);
8e87d142 965 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 966 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 967 inquiry_cache_flush(hdev);
968 do_inquiry = 1;
969 }
09fd0de5 970 hci_dev_unlock(hdev);
1da177e4 971
04837f64 972 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 973
974 if (do_inquiry) {
01178cd4
JH		 975 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
976 timeo);
70f23020
AE		 977 if (err < 0)
978 goto done;
3e13fa1e
AG		 979
980 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
981 * cleared). If it is interrupted by a signal, return -EINTR.
982 */
983 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
984 TASK_INTERRUPTIBLE))
985 return -EINTR;
70f23020 986 }
1da177e4 987
8fc9ced3
GP		 988 /* for unlimited number of responses we will use buffer with
989 * 255 entries
990 */
1da177e4
LT		 991 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
992
993 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
994 * copy it to the user space.
995 */
01df8c31 996 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 997 if (!buf) {
1da177e4
LT		 998 err = -ENOMEM;
999 goto done;
1000 }
1001
09fd0de5 1002 hci_dev_lock(hdev);
1da177e4 1003 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1004 hci_dev_unlock(hdev);
1da177e4
LT		 1005
1006 BT_DBG("num_rsp %d", ir.num_rsp);
1007
1008 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1009 ptr += sizeof(ir);
1010 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1011 ir.num_rsp))
1da177e4 1012 err = -EFAULT;
8e87d142 1013 } else
1da177e4
LT		 1014 err = -EFAULT;
1015
1016 kfree(buf);
1017
1018done:
1019 hci_dev_put(hdev);
1020 return err;
1021}
1022
3f0f524b
JH		 1023static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1024{
1025 u8 ad_len = 0, flags = 0;
1026 size_t name_len;
1027
1028 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1029 flags |= LE_AD_GENERAL;
1030
1031 if (!lmp_bredr_capable(hdev))
1032 flags |= LE_AD_NO_BREDR;
1033
1034 if (lmp_le_br_capable(hdev))
1035 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1036
1037 if (lmp_host_le_br_capable(hdev))
1038 flags |= LE_AD_SIM_LE_BREDR_HOST;
1039
1040 if (flags) {
1041 BT_DBG("adv flags 0x%02x", flags);
1042
1043 ptr[0] = 2;
1044 ptr[1] = EIR_FLAGS;
1045 ptr[2] = flags;
1046
1047 ad_len += 3;
1048 ptr += 3;
1049 }
1050
1051 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1052 ptr[0] = 2;
1053 ptr[1] = EIR_TX_POWER;
1054 ptr[2] = (u8) hdev->adv_tx_power;
1055
1056 ad_len += 3;
1057 ptr += 3;
1058 }
1059
1060 name_len = strlen(hdev->dev_name);
1061 if (name_len > 0) {
1062 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1063
1064 if (name_len > max_len) {
1065 name_len = max_len;
1066 ptr[1] = EIR_NAME_SHORT;
1067 } else
1068 ptr[1] = EIR_NAME_COMPLETE;
1069
1070 ptr[0] = name_len + 1;
1071
1072 memcpy(ptr + 2, hdev->dev_name, name_len);
1073
1074 ad_len += (name_len + 2);
1075 ptr += (name_len + 2);
1076 }
1077
1078 return ad_len;
1079}
1080
04b4edcb 1081void hci_update_ad(struct hci_request *req)
3f0f524b 1082{
04b4edcb 1083 struct hci_dev *hdev = req->hdev;
3f0f524b
JH		 1084 struct hci_cp_le_set_adv_data cp;
1085 u8 len;
3f0f524b 1086
04b4edcb
JH		 1087 if (!lmp_le_capable(hdev))
1088 return;
3f0f524b
JH		 1089
1090 memset(&cp, 0, sizeof(cp));
1091
1092 len = create_ad(hdev, cp.data);
1093
1094 if (hdev->adv_data_len == len &&
04b4edcb
JH		 1095 memcmp(cp.data, hdev->adv_data, len) == 0)
1096 return;
3f0f524b
JH		 1097
1098 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1099 hdev->adv_data_len = len;
1100
1101 cp.length = len;
3f0f524b 1102
04b4edcb 1103 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH		 1104}
1105
1da177e4
LT		 1106/* ---- HCI ioctl helpers ---- */
1107
1108int hci_dev_open(__u16 dev)
1109{
1110 struct hci_dev *hdev;
1111 int ret = 0;
1112
5a08ecce
AE		 1113 hdev = hci_dev_get(dev);
1114 if (!hdev)
1da177e4
LT		 1115 return -ENODEV;
1116
1117 BT_DBG("%s %p", hdev->name, hdev);
1118
1119 hci_req_lock(hdev);
1120
94324962
JH		 1121 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1122 ret = -ENODEV;
1123 goto done;
1124 }
1125
611b30f7
MH		 1126 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
1127 ret = -ERFKILL;
1128 goto done;
1129 }
1130
1da177e4
LT		 1131 if (test_bit(HCI_UP, &hdev->flags)) {
1132 ret = -EALREADY;
1133 goto done;
1134 }
1135
1da177e4
LT		 1136 if (hdev->open(hdev)) {
1137 ret = -EIO;
1138 goto done;
1139 }
1140
f41c70c4
MH		 1141 atomic_set(&hdev->cmd_cnt, 1);
1142 set_bit(HCI_INIT, &hdev->flags);
1143
1144 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1145 ret = hdev->setup(hdev);
1146
1147 if (!ret) {
1148 /* Treat all non BR/EDR controllers as raw devices if
1149 * enable_hs is not set.
1150 */
1151 if (hdev->dev_type != HCI_BREDR && !enable_hs)
1152 set_bit(HCI_RAW, &hdev->flags);
1153
1154 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1155 set_bit(HCI_RAW, &hdev->flags);
1156
1157 if (!test_bit(HCI_RAW, &hdev->flags))
1158 ret = __hci_init(hdev);
1da177e4
LT		 1159 }
1160
f41c70c4
MH		 1161 clear_bit(HCI_INIT, &hdev->flags);
1162
1da177e4
LT		 1163 if (!ret) {
1164 hci_dev_hold(hdev);
1165 set_bit(HCI_UP, &hdev->flags);
1166 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a
AE		 1167 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1168 mgmt_valid_hdev(hdev)) {
09fd0de5 1169 hci_dev_lock(hdev);
744cf19e 1170 mgmt_powered(hdev, 1);
09fd0de5 1171 hci_dev_unlock(hdev);
56e5cb86 1172 }
8e87d142 1173 } else {
1da177e4 1174 /* Init failed, cleanup */
3eff45ea 1175 flush_work(&hdev->tx_work);
c347b765 1176 flush_work(&hdev->cmd_work);
b78752cc 1177 flush_work(&hdev->rx_work);
1da177e4
LT		 1178
1179 skb_queue_purge(&hdev->cmd_q);
1180 skb_queue_purge(&hdev->rx_q);
1181
1182 if (hdev->flush)
1183 hdev->flush(hdev);
1184
1185 if (hdev->sent_cmd) {
1186 kfree_skb(hdev->sent_cmd);
1187 hdev->sent_cmd = NULL;
1188 }
1189
1190 hdev->close(hdev);
1191 hdev->flags = 0;
1192 }
1193
1194done:
1195 hci_req_unlock(hdev);
1196 hci_dev_put(hdev);
1197 return ret;
1198}
1199
1200static int hci_dev_do_close(struct hci_dev *hdev)
1201{
1202 BT_DBG("%s %p", hdev->name, hdev);
1203
28b75a89
AG		 1204 cancel_work_sync(&hdev->le_scan);
1205
78c04c0b
VCG		 1206 cancel_delayed_work(&hdev->power_off);
1207
1da177e4
LT		 1208 hci_req_cancel(hdev, ENODEV);
1209 hci_req_lock(hdev);
1210
1211 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1212 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1213 hci_req_unlock(hdev);
1214 return 0;
1215 }
1216
3eff45ea
GP		 1217 /* Flush RX and TX works */
1218 flush_work(&hdev->tx_work);
b78752cc 1219 flush_work(&hdev->rx_work);
1da177e4 1220
16ab91ab 1221 if (hdev->discov_timeout > 0) {
e0f9309f 1222 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1223 hdev->discov_timeout = 0;
5e5282bb 1224 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1225 }
1226
a8b2d5c2 1227 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1228 cancel_delayed_work(&hdev->service_cache);
1229
7ba8b4be
AG		 1230 cancel_delayed_work_sync(&hdev->le_scan_disable);
1231
09fd0de5 1232 hci_dev_lock(hdev);
1da177e4
LT		 1233 inquiry_cache_flush(hdev);
1234 hci_conn_hash_flush(hdev);
09fd0de5 1235 hci_dev_unlock(hdev);
1da177e4
LT		 1236
1237 hci_notify(hdev, HCI_DEV_DOWN);
1238
1239 if (hdev->flush)
1240 hdev->flush(hdev);
1241
1242 /* Reset device */
1243 skb_queue_purge(&hdev->cmd_q);
1244 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1245 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1246 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1247 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1248 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1249 clear_bit(HCI_INIT, &hdev->flags);
1250 }
1251
c347b765
GP		 1252 /* flush cmd work */
1253 flush_work(&hdev->cmd_work);
1da177e4
LT		 1254
1255 /* Drop queues */
1256 skb_queue_purge(&hdev->rx_q);
1257 skb_queue_purge(&hdev->cmd_q);
1258 skb_queue_purge(&hdev->raw_q);
1259
1260 /* Drop last sent command */
1261 if (hdev->sent_cmd) {
b79f44c1 1262 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1263 kfree_skb(hdev->sent_cmd);
1264 hdev->sent_cmd = NULL;
1265 }
1266
b6ddb638
JH		 1267 kfree_skb(hdev->recv_evt);
1268 hdev->recv_evt = NULL;
1269
1da177e4
LT		 1270 /* After this point our queues are empty
1271 * and no tasks are scheduled. */
1272 hdev->close(hdev);
1273
35b973c9
JH		 1274 /* Clear flags */
1275 hdev->flags = 0;
1276 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1277
bb4b2a9a
AE		 1278 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1279 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 1280 hci_dev_lock(hdev);
1281 mgmt_powered(hdev, 0);
1282 hci_dev_unlock(hdev);
1283 }
5add6af8 1284
ced5c338
AE		 1285 /* Controller radio is available but is currently powered down */
1286 hdev->amp_status = 0;
1287
e59fda8d 1288 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1289 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1290
1da177e4
LT		 1291 hci_req_unlock(hdev);
1292
1293 hci_dev_put(hdev);
1294 return 0;
1295}
1296
1297int hci_dev_close(__u16 dev)
1298{
1299 struct hci_dev *hdev;
1300 int err;
1301
70f23020
AE		 1302 hdev = hci_dev_get(dev);
1303 if (!hdev)
1da177e4 1304 return -ENODEV;
8ee56540
MH		 1305
1306 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1307 cancel_delayed_work(&hdev->power_off);
1308
1da177e4 1309 err = hci_dev_do_close(hdev);
8ee56540 1310
1da177e4
LT		 1311 hci_dev_put(hdev);
1312 return err;
1313}
1314
1315int hci_dev_reset(__u16 dev)
1316{
1317 struct hci_dev *hdev;
1318 int ret = 0;
1319
70f23020
AE		 1320 hdev = hci_dev_get(dev);
1321 if (!hdev)
1da177e4
LT		 1322 return -ENODEV;
1323
1324 hci_req_lock(hdev);
1da177e4
LT		 1325
1326 if (!test_bit(HCI_UP, &hdev->flags))
1327 goto done;
1328
1329 /* Drop queues */
1330 skb_queue_purge(&hdev->rx_q);
1331 skb_queue_purge(&hdev->cmd_q);
1332
09fd0de5 1333 hci_dev_lock(hdev);
1da177e4
LT		 1334 inquiry_cache_flush(hdev);
1335 hci_conn_hash_flush(hdev);
09fd0de5 1336 hci_dev_unlock(hdev);
1da177e4
LT		 1337
1338 if (hdev->flush)
1339 hdev->flush(hdev);
1340
8e87d142 1341 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1342 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1343
1344 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1345 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1346
1347done:
1da177e4
LT		 1348 hci_req_unlock(hdev);
1349 hci_dev_put(hdev);
1350 return ret;
1351}
1352
1353int hci_dev_reset_stat(__u16 dev)
1354{
1355 struct hci_dev *hdev;
1356 int ret = 0;
1357
70f23020
AE		 1358 hdev = hci_dev_get(dev);
1359 if (!hdev)
1da177e4
LT		 1360 return -ENODEV;
1361
1362 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1363
1364 hci_dev_put(hdev);
1365
1366 return ret;
1367}
1368
1369int hci_dev_cmd(unsigned int cmd, void __user *arg)
1370{
1371 struct hci_dev *hdev;
1372 struct hci_dev_req dr;
1373 int err = 0;
1374
1375 if (copy_from_user(&dr, arg, sizeof(dr)))
1376 return -EFAULT;
1377
70f23020
AE		 1378 hdev = hci_dev_get(dr.dev_id);
1379 if (!hdev)
1da177e4
LT		 1380 return -ENODEV;
1381
1382 switch (cmd) {
1383 case HCISETAUTH:
01178cd4
JH		 1384 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1385 HCI_INIT_TIMEOUT);
1da177e4
LT		 1386 break;
1387
1388 case HCISETENCRYPT:
1389 if (!lmp_encrypt_capable(hdev)) {
1390 err = -EOPNOTSUPP;
1391 break;
1392 }
1393
1394 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1395 /* Auth must be enabled first */
01178cd4
JH		 1396 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1397 HCI_INIT_TIMEOUT);
1da177e4
LT		 1398 if (err)
1399 break;
1400 }
1401
01178cd4
JH		 1402 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1403 HCI_INIT_TIMEOUT);
1da177e4
LT		 1404 break;
1405
1406 case HCISETSCAN:
01178cd4
JH		 1407 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1408 HCI_INIT_TIMEOUT);
1da177e4
LT		 1409 break;
1410
1da177e4 1411 case HCISETLINKPOL:
01178cd4
JH		 1412 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1413 HCI_INIT_TIMEOUT);
1da177e4
LT		 1414 break;
1415
1416 case HCISETLINKMODE:
e4e8e37c
MH		 1417 hdev->link_mode = ((__u16) dr.dev_opt) &
1418 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1419 break;
1420
1421 case HCISETPTYPE:
1422 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1423 break;
1424
1425 case HCISETACLMTU:
e4e8e37c
MH		 1426 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1427 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1428 break;
1429
1430 case HCISETSCOMTU:
e4e8e37c
MH		 1431 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1432 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1433 break;
1434
1435 default:
1436 err = -EINVAL;
1437 break;
1438 }
e4e8e37c 1439
1da177e4
LT		 1440 hci_dev_put(hdev);
1441 return err;
1442}
1443
1444int hci_get_dev_list(void __user *arg)
1445{
8035ded4 1446 struct hci_dev *hdev;
1da177e4
LT		 1447 struct hci_dev_list_req *dl;
1448 struct hci_dev_req *dr;
1da177e4
LT		 1449 int n = 0, size, err;
1450 __u16 dev_num;
1451
1452 if (get_user(dev_num, (__u16 __user *) arg))
1453 return -EFAULT;
1454
1455 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1456 return -EINVAL;
1457
1458 size = sizeof(*dl) + dev_num * sizeof(*dr);
1459
70f23020
AE		 1460 dl = kzalloc(size, GFP_KERNEL);
1461 if (!dl)
1da177e4
LT		 1462 return -ENOMEM;
1463
1464 dr = dl->dev_req;
1465
f20d09d5 1466 read_lock(&hci_dev_list_lock);
8035ded4 1467 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1468 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1469 cancel_delayed_work(&hdev->power_off);
c542a06c 1470
a8b2d5c2
JH		 1471 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1472 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1473
1da177e4
LT		 1474 (dr + n)->dev_id = hdev->id;
1475 (dr + n)->dev_opt = hdev->flags;
c542a06c 1476
1da177e4
LT		 1477 if (++n >= dev_num)
1478 break;
1479 }
f20d09d5 1480 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1481
1482 dl->dev_num = n;
1483 size = sizeof(*dl) + n * sizeof(*dr);
1484
1485 err = copy_to_user(arg, dl, size);
1486 kfree(dl);
1487
1488 return err ? -EFAULT : 0;
1489}
1490
1491int hci_get_dev_info(void __user *arg)
1492{
1493 struct hci_dev *hdev;
1494 struct hci_dev_info di;
1495 int err = 0;
1496
1497 if (copy_from_user(&di, arg, sizeof(di)))
1498 return -EFAULT;
1499
70f23020
AE		 1500 hdev = hci_dev_get(di.dev_id);
1501 if (!hdev)
1da177e4
LT		 1502 return -ENODEV;
1503
a8b2d5c2 1504 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1505 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1506
a8b2d5c2
JH		 1507 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1508 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1509
1da177e4
LT		 1510 strcpy(di.name, hdev->name);
1511 di.bdaddr = hdev->bdaddr;
943da25d 1512 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1513 di.flags = hdev->flags;
1514 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1515 if (lmp_bredr_capable(hdev)) {
1516 di.acl_mtu = hdev->acl_mtu;
1517 di.acl_pkts = hdev->acl_pkts;
1518 di.sco_mtu = hdev->sco_mtu;
1519 di.sco_pkts = hdev->sco_pkts;
1520 } else {
1521 di.acl_mtu = hdev->le_mtu;
1522 di.acl_pkts = hdev->le_pkts;
1523 di.sco_mtu = 0;
1524 di.sco_pkts = 0;
1525 }
1da177e4
LT		 1526 di.link_policy = hdev->link_policy;
1527 di.link_mode = hdev->link_mode;
1528
1529 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1530 memcpy(&di.features, &hdev->features, sizeof(di.features));
1531
1532 if (copy_to_user(arg, &di, sizeof(di)))
1533 err = -EFAULT;
1534
1535 hci_dev_put(hdev);
1536
1537 return err;
1538}
1539
1540/* ---- Interface to HCI drivers ---- */
1541
611b30f7
MH		 1542static int hci_rfkill_set_block(void *data, bool blocked)
1543{
1544 struct hci_dev *hdev = data;
1545
1546 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1547
1548 if (!blocked)
1549 return 0;
1550
1551 hci_dev_do_close(hdev);
1552
1553 return 0;
1554}
1555
1556static const struct rfkill_ops hci_rfkill_ops = {
1557 .set_block = hci_rfkill_set_block,
1558};
1559
ab81cbf9
JH		 1560static void hci_power_on(struct work_struct *work)
1561{
1562 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1563 int err;
ab81cbf9
JH		 1564
1565 BT_DBG("%s", hdev->name);
1566
96570ffc
JH		 1567 err = hci_dev_open(hdev->id);
1568 if (err < 0) {
1569 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1570 return;
96570ffc 1571 }
ab81cbf9 1572
a8b2d5c2 1573 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1574 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1575 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1576
a8b2d5c2 1577 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1578 mgmt_index_added(hdev);
ab81cbf9
JH		 1579}
1580
1581static void hci_power_off(struct work_struct *work)
1582{
3243553f 1583 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1584 power_off.work);
ab81cbf9
JH		 1585
1586 BT_DBG("%s", hdev->name);
1587
8ee56540 1588 hci_dev_do_close(hdev);
ab81cbf9
JH		 1589}
1590
16ab91ab
JH		 1591static void hci_discov_off(struct work_struct *work)
1592{
1593 struct hci_dev *hdev;
1594 u8 scan = SCAN_PAGE;
1595
1596 hdev = container_of(work, struct hci_dev, discov_off.work);
1597
1598 BT_DBG("%s", hdev->name);
1599
09fd0de5 1600 hci_dev_lock(hdev);
16ab91ab
JH		 1601
1602 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1603
1604 hdev->discov_timeout = 0;
1605
09fd0de5 1606 hci_dev_unlock(hdev);
16ab91ab
JH		 1607}
1608
2aeb9a1a
JH		 1609int hci_uuids_clear(struct hci_dev *hdev)
1610{
4821002c 1611 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1612
4821002c
JH		 1613 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1614 list_del(&uuid->list);
2aeb9a1a
JH		 1615 kfree(uuid);
1616 }
1617
1618 return 0;
1619}
1620
55ed8ca1
JH		 1621int hci_link_keys_clear(struct hci_dev *hdev)
1622{
1623 struct list_head *p, *n;
1624
1625 list_for_each_safe(p, n, &hdev->link_keys) {
1626 struct link_key *key;
1627
1628 key = list_entry(p, struct link_key, list);
1629
1630 list_del(p);
1631 kfree(key);
1632 }
1633
1634 return 0;
1635}
1636
b899efaf
VCG		 1637int hci_smp_ltks_clear(struct hci_dev *hdev)
1638{
1639 struct smp_ltk *k, *tmp;
1640
1641 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1642 list_del(&k->list);
1643 kfree(k);
1644 }
1645
1646 return 0;
1647}
1648
55ed8ca1
JH		 1649struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1650{
8035ded4 1651 struct link_key *k;
55ed8ca1 1652
8035ded4 1653 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1654 if (bacmp(bdaddr, &k->bdaddr) == 0)
1655 return k;
55ed8ca1
JH		 1656
1657 return NULL;
1658}
1659
745c0ce3 1660static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1661 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1662{
1663 /* Legacy key */
1664 if (key_type < 0x03)
745c0ce3 1665 return true;
d25e28ab
JH		 1666
1667 /* Debug keys are insecure so don't store them persistently */
1668 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1669 return false;
d25e28ab
JH		 1670
1671 /* Changed combination key and there's no previous one */
1672 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1673 return false;
d25e28ab
JH		 1674
1675 /* Security mode 3 case */
1676 if (!conn)
745c0ce3 1677 return true;
d25e28ab
JH		 1678
1679 /* Neither local nor remote side had no-bonding as requirement */
1680 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1681 return true;
d25e28ab
JH		 1682
1683 /* Local side had dedicated bonding as requirement */
1684 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1685 return true;
d25e28ab
JH		 1686
1687 /* Remote side had dedicated bonding as requirement */
1688 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1689 return true;
d25e28ab
JH		 1690
1691 /* If none of the above criteria match, then don't store the key
1692 * persistently */
745c0ce3 1693 return false;
d25e28ab
JH		 1694}
1695
c9839a11 1696struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1697{
c9839a11 1698 struct smp_ltk *k;
75d262c2 1699
c9839a11
VCG		 1700 list_for_each_entry(k, &hdev->long_term_keys, list) {
1701 if (k->ediv != ediv ||
a8c5fb1a 1702 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1703 continue;
1704
c9839a11 1705 return k;
75d262c2
VCG		 1706 }
1707
1708 return NULL;
1709}
75d262c2 1710
c9839a11 1711struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1712 u8 addr_type)
75d262c2 1713{
c9839a11 1714 struct smp_ltk *k;
75d262c2 1715
c9839a11
VCG		 1716 list_for_each_entry(k, &hdev->long_term_keys, list)
1717 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1718 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1719 return k;
1720
1721 return NULL;
1722}
75d262c2 1723
d25e28ab 1724int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1725 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1726{
1727 struct link_key *key, *old_key;
745c0ce3
VA		 1728 u8 old_key_type;
1729 bool persistent;
55ed8ca1
JH		 1730
1731 old_key = hci_find_link_key(hdev, bdaddr);
1732 if (old_key) {
1733 old_key_type = old_key->type;
1734 key = old_key;
1735 } else {
12adcf3a 1736 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1737 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1738 if (!key)
1739 return -ENOMEM;
1740 list_add(&key->list, &hdev->link_keys);
1741 }
1742
6ed93dc6 1743 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1744
d25e28ab
JH		 1745 /* Some buggy controller combinations generate a changed
1746 * combination key for legacy pairing even when there's no
1747 * previous key */
1748 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1749 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1750 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1751 if (conn)
1752 conn->key_type = type;
1753 }
d25e28ab 1754
55ed8ca1 1755 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1756 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1757 key->pin_len = pin_len;
1758
b6020ba0 1759 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1760 key->type = old_key_type;
4748fed2
JH		 1761 else
1762 key->type = type;
1763
4df378a1
JH		 1764 if (!new_key)
1765 return 0;
1766
1767 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1768
744cf19e 1769 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1770
6ec5bcad
VA		 1771 if (conn)
1772 conn->flush_key = !persistent;
55ed8ca1
JH		 1773
1774 return 0;
1775}
1776
c9839a11 1777int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1778 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1779 ediv, u8 rand[8])
75d262c2 1780{
c9839a11 1781 struct smp_ltk *key, *old_key;
75d262c2 1782
c9839a11
VCG		 1783 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1784 return 0;
75d262c2 1785
c9839a11
VCG		 1786 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1787 if (old_key)
75d262c2 1788 key = old_key;
c9839a11
VCG		 1789 else {
1790 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1791 if (!key)
1792 return -ENOMEM;
c9839a11 1793 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1794 }
1795
75d262c2 1796 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1797 key->bdaddr_type = addr_type;
1798 memcpy(key->val, tk, sizeof(key->val));
1799 key->authenticated = authenticated;
1800 key->ediv = ediv;
1801 key->enc_size = enc_size;
1802 key->type = type;
1803 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1804
c9839a11
VCG		 1805 if (!new_key)
1806 return 0;
75d262c2 1807
261cc5aa
VCG		 1808 if (type & HCI_SMP_LTK)
1809 mgmt_new_ltk(hdev, key, 1);
1810
75d262c2
VCG		 1811 return 0;
1812}
1813
55ed8ca1
JH		 1814int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1815{
1816 struct link_key *key;
1817
1818 key = hci_find_link_key(hdev, bdaddr);
1819 if (!key)
1820 return -ENOENT;
1821
6ed93dc6 1822 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1823
1824 list_del(&key->list);
1825 kfree(key);
1826
1827 return 0;
1828}
1829
b899efaf
VCG		 1830int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1831{
1832 struct smp_ltk *k, *tmp;
1833
1834 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1835 if (bacmp(bdaddr, &k->bdaddr))
1836 continue;
1837
6ed93dc6 1838 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1839
1840 list_del(&k->list);
1841 kfree(k);
1842 }
1843
1844 return 0;
1845}
1846
6bd32326 1847/* HCI command timer function */
bda4f23a 1848static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1849{
1850 struct hci_dev *hdev = (void *) arg;
1851
bda4f23a
AE		 1852 if (hdev->sent_cmd) {
1853 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1854 u16 opcode = __le16_to_cpu(sent->opcode);
1855
1856 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1857 } else {
1858 BT_ERR("%s command tx timeout", hdev->name);
1859 }
1860
6bd32326 1861 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1862 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1863}
1864
2763eda6 1865struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1866 bdaddr_t *bdaddr)
2763eda6
SJ		 1867{
1868 struct oob_data *data;
1869
1870 list_for_each_entry(data, &hdev->remote_oob_data, list)
1871 if (bacmp(bdaddr, &data->bdaddr) == 0)
1872 return data;
1873
1874 return NULL;
1875}
1876
1877int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1878{
1879 struct oob_data *data;
1880
1881 data = hci_find_remote_oob_data(hdev, bdaddr);
1882 if (!data)
1883 return -ENOENT;
1884
6ed93dc6 1885 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1886
1887 list_del(&data->list);
1888 kfree(data);
1889
1890 return 0;
1891}
1892
1893int hci_remote_oob_data_clear(struct hci_dev *hdev)
1894{
1895 struct oob_data *data, *n;
1896
1897 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1898 list_del(&data->list);
1899 kfree(data);
1900 }
1901
1902 return 0;
1903}
1904
1905int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1906 u8 *randomizer)
2763eda6
SJ		 1907{
1908 struct oob_data *data;
1909
1910 data = hci_find_remote_oob_data(hdev, bdaddr);
1911
1912 if (!data) {
1913 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1914 if (!data)
1915 return -ENOMEM;
1916
1917 bacpy(&data->bdaddr, bdaddr);
1918 list_add(&data->list, &hdev->remote_oob_data);
1919 }
1920
1921 memcpy(data->hash, hash, sizeof(data->hash));
1922 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1923
6ed93dc6 1924 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1925
1926 return 0;
1927}
1928
04124681 1929struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1930{
8035ded4 1931 struct bdaddr_list *b;
b2a66aad 1932
8035ded4 1933 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1934 if (bacmp(bdaddr, &b->bdaddr) == 0)
1935 return b;
b2a66aad
AJ		 1936
1937 return NULL;
1938}
1939
1940int hci_blacklist_clear(struct hci_dev *hdev)
1941{
1942 struct list_head *p, *n;
1943
1944 list_for_each_safe(p, n, &hdev->blacklist) {
1945 struct bdaddr_list *b;
1946
1947 b = list_entry(p, struct bdaddr_list, list);
1948
1949 list_del(p);
1950 kfree(b);
1951 }
1952
1953 return 0;
1954}
1955
88c1fe4b 1956int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1957{
1958 struct bdaddr_list *entry;
b2a66aad
AJ		 1959
1960 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1961 return -EBADF;
1962
5e762444
AJ		 1963 if (hci_blacklist_lookup(hdev, bdaddr))
1964 return -EEXIST;
b2a66aad
AJ		 1965
1966 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1967 if (!entry)
1968 return -ENOMEM;
b2a66aad
AJ		 1969
1970 bacpy(&entry->bdaddr, bdaddr);
1971
1972 list_add(&entry->list, &hdev->blacklist);
1973
88c1fe4b 1974 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1975}
1976
88c1fe4b 1977int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1978{
1979 struct bdaddr_list *entry;
b2a66aad 1980
1ec918ce 1981 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1982 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1983
1984 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1985 if (!entry)
5e762444 1986 return -ENOENT;
b2a66aad
AJ		 1987
1988 list_del(&entry->list);
1989 kfree(entry);
1990
88c1fe4b 1991 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1992}
1993
42c6b129 1994static void le_scan_param_req(struct hci_request *req, unsigned long opt)
7ba8b4be
AG		 1995{
1996 struct le_scan_params *param = (struct le_scan_params *) opt;
1997 struct hci_cp_le_set_scan_param cp;
1998
1999 memset(&cp, 0, sizeof(cp));
2000 cp.type = param->type;
2001 cp.interval = cpu_to_le16(param->interval);
2002 cp.window = cpu_to_le16(param->window);
2003
42c6b129 2004 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
7ba8b4be
AG		 2005}
2006
42c6b129 2007static void le_scan_enable_req(struct hci_request *req, unsigned long opt)
7ba8b4be
AG		 2008{
2009 struct hci_cp_le_set_scan_enable cp;
2010
2011 memset(&cp, 0, sizeof(cp));
76a388be 2012 cp.enable = LE_SCAN_ENABLE;
525e296a 2013 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
7ba8b4be 2014
42c6b129 2015 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
7ba8b4be
AG		 2016}
2017
2018static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 2019 u16 window, int timeout)
7ba8b4be
AG		 2020{
2021 long timeo = msecs_to_jiffies(3000);
2022 struct le_scan_params param;
2023 int err;
2024
2025 BT_DBG("%s", hdev->name);
2026
2027 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
2028 return -EINPROGRESS;
2029
2030 param.type = type;
2031 param.interval = interval;
2032 param.window = window;
2033
2034 hci_req_lock(hdev);
2035
01178cd4
JH		 2036 err = __hci_req_sync(hdev, le_scan_param_req, (unsigned long) &param,
2037 timeo);
7ba8b4be 2038 if (!err)
01178cd4 2039 err = __hci_req_sync(hdev, le_scan_enable_req, 0, timeo);
7ba8b4be
AG		 2040
2041 hci_req_unlock(hdev);
2042
2043 if (err < 0)
2044 return err;
2045
46818ed5 2046 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
b6c7515a 2047 timeout);
7ba8b4be
AG		 2048
2049 return 0;
2050}
2051
7dbfac1d
AG		 2052int hci_cancel_le_scan(struct hci_dev *hdev)
2053{
2054 BT_DBG("%s", hdev->name);
2055
2056 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
2057 return -EALREADY;
2058
2059 if (cancel_delayed_work(&hdev->le_scan_disable)) {
2060 struct hci_cp_le_set_scan_enable cp;
2061
2062 /* Send HCI command to disable LE Scan */
2063 memset(&cp, 0, sizeof(cp));
2064 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2065 }
2066
2067 return 0;
2068}
2069
7ba8b4be
AG		 2070static void le_scan_disable_work(struct work_struct *work)
2071{
2072 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2073 le_scan_disable.work);
7ba8b4be
AG		 2074 struct hci_cp_le_set_scan_enable cp;
2075
2076 BT_DBG("%s", hdev->name);
2077
2078 memset(&cp, 0, sizeof(cp));
2079
2080 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2081}
2082
28b75a89
AG		 2083static void le_scan_work(struct work_struct *work)
2084{
2085 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
2086 struct le_scan_params *param = &hdev->le_scan_params;
2087
2088 BT_DBG("%s", hdev->name);
2089
04124681
GP		 2090 hci_do_le_scan(hdev, param->type, param->interval, param->window,
2091 param->timeout);
28b75a89
AG		 2092}
2093
2094int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 2095 int timeout)
28b75a89
AG		 2096{
2097 struct le_scan_params *param = &hdev->le_scan_params;
2098
2099 BT_DBG("%s", hdev->name);
2100
f1550478
JH		 2101 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
2102 return -ENOTSUPP;
2103
28b75a89
AG		 2104 if (work_busy(&hdev->le_scan))
2105 return -EINPROGRESS;
2106
2107 param->type = type;
2108 param->interval = interval;
2109 param->window = window;
2110 param->timeout = timeout;
2111
2112 queue_work(system_long_wq, &hdev->le_scan);
2113
2114 return 0;
2115}
2116
9be0dab7
DH		 2117/* Alloc HCI device */
2118struct hci_dev *hci_alloc_dev(void)
2119{
2120 struct hci_dev *hdev;
2121
2122 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2123 if (!hdev)
2124 return NULL;
2125
b1b813d4
DH		 2126 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2127 hdev->esco_type = (ESCO_HV1);
2128 hdev->link_mode = (HCI_LM_ACCEPT);
2129 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 2130 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2131 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2132
b1b813d4
DH		 2133 hdev->sniff_max_interval = 800;
2134 hdev->sniff_min_interval = 80;
2135
2136 mutex_init(&hdev->lock);
2137 mutex_init(&hdev->req_lock);
2138
2139 INIT_LIST_HEAD(&hdev->mgmt_pending);
2140 INIT_LIST_HEAD(&hdev->blacklist);
2141 INIT_LIST_HEAD(&hdev->uuids);
2142 INIT_LIST_HEAD(&hdev->link_keys);
2143 INIT_LIST_HEAD(&hdev->long_term_keys);
2144 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 2145 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2146
2147 INIT_WORK(&hdev->rx_work, hci_rx_work);
2148 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2149 INIT_WORK(&hdev->tx_work, hci_tx_work);
2150 INIT_WORK(&hdev->power_on, hci_power_on);
2151 INIT_WORK(&hdev->le_scan, le_scan_work);
2152
b1b813d4
DH		 2153 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2154 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2155 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2156
b1b813d4
DH		 2157 skb_queue_head_init(&hdev->rx_q);
2158 skb_queue_head_init(&hdev->cmd_q);
2159 skb_queue_head_init(&hdev->raw_q);
2160
2161 init_waitqueue_head(&hdev->req_wait_q);
2162
bda4f23a 2163 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2164
b1b813d4
DH		 2165 hci_init_sysfs(hdev);
2166 discovery_init(hdev);
9be0dab7
DH		 2167
2168 return hdev;
2169}
2170EXPORT_SYMBOL(hci_alloc_dev);
2171
2172/* Free HCI device */
2173void hci_free_dev(struct hci_dev *hdev)
2174{
9be0dab7
DH		 2175 /* will free via device release */
2176 put_device(&hdev->dev);
2177}
2178EXPORT_SYMBOL(hci_free_dev);
2179
1da177e4
LT		 2180/* Register HCI device */
2181int hci_register_dev(struct hci_dev *hdev)
2182{
b1b813d4 2183 int id, error;
1da177e4 2184
010666a1 2185 if (!hdev->open || !hdev->close)
1da177e4
LT		 2186 return -EINVAL;
2187
08add513
MM		 2188 /* Do not allow HCI_AMP devices to register at index 0,
2189 * so the index can be used as the AMP controller ID.
2190 */
3df92b31
SL		 2191 switch (hdev->dev_type) {
2192 case HCI_BREDR:
2193 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2194 break;
2195 case HCI_AMP:
2196 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2197 break;
2198 default:
2199 return -EINVAL;
1da177e4 2200 }
8e87d142 2201
3df92b31
SL		 2202 if (id < 0)
2203 return id;
2204
1da177e4
LT		 2205 sprintf(hdev->name, "hci%d", id);
2206 hdev->id = id;
2d8b3a11
AE		 2207
2208 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2209
32845eb1 2210 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 2211 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 2212 if (!hdev->workqueue) {
2213 error = -ENOMEM;
2214 goto err;
2215 }
f48fd9c8 2216
6ead1bbc
JH		 2217 hdev->req_workqueue = alloc_workqueue(hdev->name,
2218 WQ_HIGHPRI | WQ_UNBOUND |
2219 WQ_MEM_RECLAIM, 1);
2220 if (!hdev->req_workqueue) {
2221 destroy_workqueue(hdev->workqueue);
2222 error = -ENOMEM;
2223 goto err;
2224 }
2225
33ca954d
DH		 2226 error = hci_add_sysfs(hdev);
2227 if (error < 0)
2228 goto err_wqueue;
1da177e4 2229
611b30f7 2230 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2231 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2232 hdev);
611b30f7
MH		 2233 if (hdev->rfkill) {
2234 if (rfkill_register(hdev->rfkill) < 0) {
2235 rfkill_destroy(hdev->rfkill);
2236 hdev->rfkill = NULL;
2237 }
2238 }
2239
a8b2d5c2 2240 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 2241
2242 if (hdev->dev_type != HCI_AMP)
2243 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2244
fcee3377
GP		 2245 write_lock(&hci_dev_list_lock);
2246 list_add(&hdev->list, &hci_dev_list);
2247 write_unlock(&hci_dev_list_lock);
2248
1da177e4 2249 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2250 hci_dev_hold(hdev);
1da177e4 2251
19202573 2252 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2253
1da177e4 2254 return id;
f48fd9c8 2255
33ca954d
DH		 2256err_wqueue:
2257 destroy_workqueue(hdev->workqueue);
6ead1bbc 2258 destroy_workqueue(hdev->req_workqueue);
33ca954d 2259err:
3df92b31 2260 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 2261
33ca954d 2262 return error;
1da177e4
LT		 2263}
2264EXPORT_SYMBOL(hci_register_dev);
2265
2266/* Unregister HCI device */
59735631 2267void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2268{
3df92b31 2269 int i, id;
ef222013 2270
c13854ce 2271 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2272
94324962
JH		 2273 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2274
3df92b31
SL		 2275 id = hdev->id;
2276
f20d09d5 2277 write_lock(&hci_dev_list_lock);
1da177e4 2278 list_del(&hdev->list);
f20d09d5 2279 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2280
2281 hci_dev_do_close(hdev);
2282
cd4c5391 2283 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2284 kfree_skb(hdev->reassembly[i]);
2285
b9b5ef18
GP		 2286 cancel_work_sync(&hdev->power_on);
2287
ab81cbf9 2288 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2289 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2290 hci_dev_lock(hdev);
744cf19e 2291 mgmt_index_removed(hdev);
09fd0de5 2292 hci_dev_unlock(hdev);
56e5cb86 2293 }
ab81cbf9 2294
2e58ef3e
JH		 2295 /* mgmt_index_removed should take care of emptying the
2296 * pending list */
2297 BUG_ON(!list_empty(&hdev->mgmt_pending));
2298
1da177e4
LT		 2299 hci_notify(hdev, HCI_DEV_UNREG);
2300
611b30f7
MH		 2301 if (hdev->rfkill) {
2302 rfkill_unregister(hdev->rfkill);
2303 rfkill_destroy(hdev->rfkill);
2304 }
2305
ce242970 2306 hci_del_sysfs(hdev);
147e2d59 2307
f48fd9c8 2308 destroy_workqueue(hdev->workqueue);
6ead1bbc 2309 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2310
09fd0de5 2311 hci_dev_lock(hdev);
e2e0cacb 2312 hci_blacklist_clear(hdev);
2aeb9a1a 2313 hci_uuids_clear(hdev);
55ed8ca1 2314 hci_link_keys_clear(hdev);
b899efaf 2315 hci_smp_ltks_clear(hdev);
2763eda6 2316 hci_remote_oob_data_clear(hdev);
09fd0de5 2317 hci_dev_unlock(hdev);
e2e0cacb 2318
dc946bd8 2319 hci_dev_put(hdev);
3df92b31
SL		 2320
2321 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2322}
2323EXPORT_SYMBOL(hci_unregister_dev);
2324
2325/* Suspend HCI device */
2326int hci_suspend_dev(struct hci_dev *hdev)
2327{
2328 hci_notify(hdev, HCI_DEV_SUSPEND);
2329 return 0;
2330}
2331EXPORT_SYMBOL(hci_suspend_dev);
2332
2333/* Resume HCI device */
2334int hci_resume_dev(struct hci_dev *hdev)
2335{
2336 hci_notify(hdev, HCI_DEV_RESUME);
2337 return 0;
2338}
2339EXPORT_SYMBOL(hci_resume_dev);
2340
76bca880
MH		 2341/* Receive frame from HCI drivers */
2342int hci_recv_frame(struct sk_buff *skb)
2343{
2344 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2345 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2346 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2347 kfree_skb(skb);
2348 return -ENXIO;
2349 }
2350
d82603c6 2351 /* Incoming skb */
76bca880
MH		 2352 bt_cb(skb)->incoming = 1;
2353
2354 /* Time stamp */
2355 __net_timestamp(skb);
2356
76bca880 2357 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2358 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2359
76bca880
MH		 2360 return 0;
2361}
2362EXPORT_SYMBOL(hci_recv_frame);
2363
33e882a5 2364static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2365 int count, __u8 index)
33e882a5
SS		 2366{
2367 int len = 0;
2368 int hlen = 0;
2369 int remain = count;
2370 struct sk_buff *skb;
2371 struct bt_skb_cb *scb;
2372
2373 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2374 index >= NUM_REASSEMBLY)
33e882a5
SS		 2375 return -EILSEQ;
2376
2377 skb = hdev->reassembly[index];
2378
2379 if (!skb) {
2380 switch (type) {
2381 case HCI_ACLDATA_PKT:
2382 len = HCI_MAX_FRAME_SIZE;
2383 hlen = HCI_ACL_HDR_SIZE;
2384 break;
2385 case HCI_EVENT_PKT:
2386 len = HCI_MAX_EVENT_SIZE;
2387 hlen = HCI_EVENT_HDR_SIZE;
2388 break;
2389 case HCI_SCODATA_PKT:
2390 len = HCI_MAX_SCO_SIZE;
2391 hlen = HCI_SCO_HDR_SIZE;
2392 break;
2393 }
2394
1e429f38 2395 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2396 if (!skb)
2397 return -ENOMEM;
2398
2399 scb = (void *) skb->cb;
2400 scb->expect = hlen;
2401 scb->pkt_type = type;
2402
2403 skb->dev = (void *) hdev;
2404 hdev->reassembly[index] = skb;
2405 }
2406
2407 while (count) {
2408 scb = (void *) skb->cb;
89bb46d0 2409 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2410
2411 memcpy(skb_put(skb, len), data, len);
2412
2413 count -= len;
2414 data += len;
2415 scb->expect -= len;
2416 remain = count;
2417
2418 switch (type) {
2419 case HCI_EVENT_PKT:
2420 if (skb->len == HCI_EVENT_HDR_SIZE) {
2421 struct hci_event_hdr *h = hci_event_hdr(skb);
2422 scb->expect = h->plen;
2423
2424 if (skb_tailroom(skb) < scb->expect) {
2425 kfree_skb(skb);
2426 hdev->reassembly[index] = NULL;
2427 return -ENOMEM;
2428 }
2429 }
2430 break;
2431
2432 case HCI_ACLDATA_PKT:
2433 if (skb->len == HCI_ACL_HDR_SIZE) {
2434 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2435 scb->expect = __le16_to_cpu(h->dlen);
2436
2437 if (skb_tailroom(skb) < scb->expect) {
2438 kfree_skb(skb);
2439 hdev->reassembly[index] = NULL;
2440 return -ENOMEM;
2441 }
2442 }
2443 break;
2444
2445 case HCI_SCODATA_PKT:
2446 if (skb->len == HCI_SCO_HDR_SIZE) {
2447 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2448 scb->expect = h->dlen;
2449
2450 if (skb_tailroom(skb) < scb->expect) {
2451 kfree_skb(skb);
2452 hdev->reassembly[index] = NULL;
2453 return -ENOMEM;
2454 }
2455 }
2456 break;
2457 }
2458
2459 if (scb->expect == 0) {
2460 /* Complete frame */
2461
2462 bt_cb(skb)->pkt_type = type;
2463 hci_recv_frame(skb);
2464
2465 hdev->reassembly[index] = NULL;
2466 return remain;
2467 }
2468 }
2469
2470 return remain;
2471}
2472
ef222013
MH		 2473int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2474{
f39a3c06
SS		 2475 int rem = 0;
2476
ef222013
MH		 2477 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2478 return -EILSEQ;
2479
da5f6c37 2480 while (count) {
1e429f38 2481 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2482 if (rem < 0)
2483 return rem;
ef222013 2484
f39a3c06
SS		 2485 data += (count - rem);
2486 count = rem;
f81c6224 2487 }
ef222013 2488
f39a3c06 2489 return rem;
ef222013
MH		 2490}
2491EXPORT_SYMBOL(hci_recv_fragment);
2492
99811510
SS		 2493#define STREAM_REASSEMBLY 0
2494
2495int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2496{
2497 int type;
2498 int rem = 0;
2499
da5f6c37 2500 while (count) {
99811510
SS		 2501 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2502
2503 if (!skb) {
2504 struct { char type; } *pkt;
2505
2506 /* Start of the frame */
2507 pkt = data;
2508 type = pkt->type;
2509
2510 data++;
2511 count--;
2512 } else
2513 type = bt_cb(skb)->pkt_type;
2514
1e429f38 2515 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2516 STREAM_REASSEMBLY);
99811510
SS		 2517 if (rem < 0)
2518 return rem;
2519
2520 data += (count - rem);
2521 count = rem;
f81c6224 2522 }
99811510
SS		 2523
2524 return rem;
2525}
2526EXPORT_SYMBOL(hci_recv_stream_fragment);
2527
1da177e4
LT		 2528/* ---- Interface to upper protocols ---- */
2529
1da177e4
LT		 2530int hci_register_cb(struct hci_cb *cb)
2531{
2532 BT_DBG("%p name %s", cb, cb->name);
2533
f20d09d5 2534 write_lock(&hci_cb_list_lock);
1da177e4 2535 list_add(&cb->list, &hci_cb_list);
f20d09d5 2536 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2537
2538 return 0;
2539}
2540EXPORT_SYMBOL(hci_register_cb);
2541
2542int hci_unregister_cb(struct hci_cb *cb)
2543{
2544 BT_DBG("%p name %s", cb, cb->name);
2545
f20d09d5 2546 write_lock(&hci_cb_list_lock);
1da177e4 2547 list_del(&cb->list);
f20d09d5 2548 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2549
2550 return 0;
2551}
2552EXPORT_SYMBOL(hci_unregister_cb);
2553
2554static int hci_send_frame(struct sk_buff *skb)
2555{
2556 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2557
2558 if (!hdev) {
2559 kfree_skb(skb);
2560 return -ENODEV;
2561 }
2562
0d48d939 2563 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2564
cd82e61c
MH		 2565 /* Time stamp */
2566 __net_timestamp(skb);
1da177e4 2567
cd82e61c
MH		 2568 /* Send copy to monitor */
2569 hci_send_to_monitor(hdev, skb);
2570
2571 if (atomic_read(&hdev->promisc)) {
2572 /* Send copy to the sockets */
470fe1b5 2573 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2574 }
2575
2576 /* Get rid of skb owner, prior to sending to the driver. */
2577 skb_orphan(skb);
2578
2579 return hdev->send(skb);
2580}
2581
3119ae95
JH		 2582void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2583{
2584 skb_queue_head_init(&req->cmd_q);
2585 req->hdev = hdev;
5d73e034 2586 req->err = 0;
3119ae95
JH		 2587}
2588
2589int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2590{
2591 struct hci_dev *hdev = req->hdev;
2592 struct sk_buff *skb;
2593 unsigned long flags;
2594
2595 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2596
5d73e034
AG		 2597 /* If an error occured during request building, remove all HCI
2598 * commands queued on the HCI request queue.
2599 */
2600 if (req->err) {
2601 skb_queue_purge(&req->cmd_q);
2602 return req->err;
2603 }
2604
3119ae95
JH		 2605 /* Do not allow empty requests */
2606 if (skb_queue_empty(&req->cmd_q))
382b0c39 2607 return -ENODATA;
3119ae95
JH		 2608
2609 skb = skb_peek_tail(&req->cmd_q);
2610 bt_cb(skb)->req.complete = complete;
2611
2612 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2613 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2614 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2615
2616 queue_work(hdev->workqueue, &hdev->cmd_work);
2617
2618 return 0;
2619}
2620
1ca3a9d0 2621static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2622 u32 plen, const void *param)
1da177e4
LT		 2623{
2624 int len = HCI_COMMAND_HDR_SIZE + plen;
2625 struct hci_command_hdr *hdr;
2626 struct sk_buff *skb;
2627
1da177e4 2628 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2629 if (!skb)
2630 return NULL;
1da177e4
LT		 2631
2632 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2633 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2634 hdr->plen = plen;
2635
2636 if (plen)
2637 memcpy(skb_put(skb, plen), param, plen);
2638
2639 BT_DBG("skb len %d", skb->len);
2640
0d48d939 2641 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2642 skb->dev = (void *) hdev;
c78ae283 2643
1ca3a9d0
JH		 2644 return skb;
2645}
2646
2647/* Send HCI command */
07dc93dd
JH		 2648int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2649 const void *param)
1ca3a9d0
JH		 2650{
2651 struct sk_buff *skb;
2652
2653 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2654
2655 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2656 if (!skb) {
2657 BT_ERR("%s no memory for command", hdev->name);
2658 return -ENOMEM;
2659 }
2660
11714b3d
JH		 2661 /* Stand-alone HCI commands must be flaged as
2662 * single-command requests.
2663 */
2664 bt_cb(skb)->req.start = true;
2665
1da177e4 2666 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2667 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2668
2669 return 0;
2670}
1da177e4 2671
71c76a17 2672/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 2673void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2674 const void *param, u8 event)
71c76a17
JH		 2675{
2676 struct hci_dev *hdev = req->hdev;
2677 struct sk_buff *skb;
2678
2679 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2680
34739c1e
AG		 2681 /* If an error occured during request building, there is no point in
2682 * queueing the HCI command. We can simply return.
2683 */
2684 if (req->err)
2685 return;
2686
71c76a17
JH		 2687 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2688 if (!skb) {
5d73e034
AG		 2689 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2690 hdev->name, opcode);
2691 req->err = -ENOMEM;
e348fe6b 2692 return;
71c76a17
JH		 2693 }
2694
2695 if (skb_queue_empty(&req->cmd_q))
2696 bt_cb(skb)->req.start = true;
2697
02350a72
JH		 2698 bt_cb(skb)->req.event = event;
2699
71c76a17 2700 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 2701}
2702
07dc93dd
JH		 2703void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2704 const void *param)
02350a72
JH		 2705{
2706 hci_req_add_ev(req, opcode, plen, param, 0);
2707}
2708
1da177e4 2709/* Get data from the previously sent command */
a9de9248 2710void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2711{
2712 struct hci_command_hdr *hdr;
2713
2714 if (!hdev->sent_cmd)
2715 return NULL;
2716
2717 hdr = (void *) hdev->sent_cmd->data;
2718
a9de9248 2719 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2720 return NULL;
2721
f0e09510 2722 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2723
2724 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2725}
2726
2727/* Send ACL data */
2728static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2729{
2730 struct hci_acl_hdr *hdr;
2731 int len = skb->len;
2732
badff6d0
ACM		 2733 skb_push(skb, HCI_ACL_HDR_SIZE);
2734 skb_reset_transport_header(skb);
9c70220b 2735 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2736 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2737 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2738}
2739
ee22be7e 2740static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2741 struct sk_buff *skb, __u16 flags)
1da177e4 2742{
ee22be7e 2743 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2744 struct hci_dev *hdev = conn->hdev;
2745 struct sk_buff *list;
2746
087bfd99
GP		 2747 skb->len = skb_headlen(skb);
2748 skb->data_len = 0;
2749
2750 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2751
2752 switch (hdev->dev_type) {
2753 case HCI_BREDR:
2754 hci_add_acl_hdr(skb, conn->handle, flags);
2755 break;
2756 case HCI_AMP:
2757 hci_add_acl_hdr(skb, chan->handle, flags);
2758 break;
2759 default:
2760 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2761 return;
2762 }
087bfd99 2763
70f23020
AE		 2764 list = skb_shinfo(skb)->frag_list;
2765 if (!list) {
1da177e4
LT		 2766 /* Non fragmented */
2767 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2768
73d80deb 2769 skb_queue_tail(queue, skb);
1da177e4
LT		 2770 } else {
2771 /* Fragmented */
2772 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2773
2774 skb_shinfo(skb)->frag_list = NULL;
2775
2776 /* Queue all fragments atomically */
af3e6359 2777 spin_lock(&queue->lock);
1da177e4 2778
73d80deb 2779 __skb_queue_tail(queue, skb);
e702112f
AE		 2780
2781 flags &= ~ACL_START;
2782 flags |= ACL_CONT;
1da177e4
LT		 2783 do {
2784 skb = list; list = list->next;
8e87d142 2785
1da177e4 2786 skb->dev = (void *) hdev;
0d48d939 2787 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2788 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2789
2790 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2791
73d80deb 2792 __skb_queue_tail(queue, skb);
1da177e4
LT		 2793 } while (list);
2794
af3e6359 2795 spin_unlock(&queue->lock);
1da177e4 2796 }
73d80deb
LAD		 2797}
2798
2799void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2800{
ee22be7e 2801 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2802
f0e09510 2803 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2804
2805 skb->dev = (void *) hdev;
73d80deb 2806
ee22be7e 2807 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2808
3eff45ea 2809 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2810}
1da177e4
LT		 2811
2812/* Send SCO data */
0d861d8b 2813void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2814{
2815 struct hci_dev *hdev = conn->hdev;
2816 struct hci_sco_hdr hdr;
2817
2818 BT_DBG("%s len %d", hdev->name, skb->len);
2819
aca3192c 2820 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2821 hdr.dlen = skb->len;
2822
badff6d0
ACM		 2823 skb_push(skb, HCI_SCO_HDR_SIZE);
2824 skb_reset_transport_header(skb);
9c70220b 2825 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2826
2827 skb->dev = (void *) hdev;
0d48d939 2828 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2829
1da177e4 2830 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2831 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2832}
1da177e4
LT		 2833
2834/* ---- HCI TX task (outgoing data) ---- */
2835
2836/* HCI Connection scheduler */
6039aa73
GP		 2837static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2838 int *quote)
1da177e4
LT		 2839{
2840 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2841 struct hci_conn *conn = NULL, *c;
abc5de8f 2842 unsigned int num = 0, min = ~0;
1da177e4 2843
8e87d142 2844 /* We don't have to lock device here. Connections are always
1da177e4 2845 * added and removed with TX task disabled. */
bf4c6325
GP		 2846
2847 rcu_read_lock();
2848
2849 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2850 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2851 continue;
769be974
MH		 2852
2853 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2854 continue;
2855
1da177e4
LT		 2856 num++;
2857
2858 if (c->sent < min) {
2859 min = c->sent;
2860 conn = c;
2861 }
52087a79
LAD		 2862
2863 if (hci_conn_num(hdev, type) == num)
2864 break;
1da177e4
LT		 2865 }
2866
bf4c6325
GP		 2867 rcu_read_unlock();
2868
1da177e4 2869 if (conn) {
6ed58ec5
VT		 2870 int cnt, q;
2871
2872 switch (conn->type) {
2873 case ACL_LINK:
2874 cnt = hdev->acl_cnt;
2875 break;
2876 case SCO_LINK:
2877 case ESCO_LINK:
2878 cnt = hdev->sco_cnt;
2879 break;
2880 case LE_LINK:
2881 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2882 break;
2883 default:
2884 cnt = 0;
2885 BT_ERR("Unknown link type");
2886 }
2887
2888 q = cnt / num;
1da177e4
LT		 2889 *quote = q ? q : 1;
2890 } else
2891 *quote = 0;
2892
2893 BT_DBG("conn %p quote %d", conn, *quote);
2894 return conn;
2895}
2896
6039aa73 2897static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2898{
2899 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2900 struct hci_conn *c;
1da177e4 2901
bae1f5d9 2902 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2903
bf4c6325
GP		 2904 rcu_read_lock();
2905
1da177e4 2906 /* Kill stalled connections */
bf4c6325 2907 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2908 if (c->type == type && c->sent) {
6ed93dc6
AE		 2909 BT_ERR("%s killing stalled connection %pMR",
2910 hdev->name, &c->dst);
bed71748 2911 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2912 }
2913 }
bf4c6325
GP		 2914
2915 rcu_read_unlock();
1da177e4
LT		 2916}
2917
6039aa73
GP		 2918static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2919 int *quote)
1da177e4 2920{
73d80deb
LAD		 2921 struct hci_conn_hash *h = &hdev->conn_hash;
2922 struct hci_chan *chan = NULL;
abc5de8f 2923 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2924 struct hci_conn *conn;
73d80deb
LAD		 2925 int cnt, q, conn_num = 0;
2926
2927 BT_DBG("%s", hdev->name);
2928
bf4c6325
GP		 2929 rcu_read_lock();
2930
2931 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2932 struct hci_chan *tmp;
2933
2934 if (conn->type != type)
2935 continue;
2936
2937 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2938 continue;
2939
2940 conn_num++;
2941
8192edef 2942 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2943 struct sk_buff *skb;
2944
2945 if (skb_queue_empty(&tmp->data_q))
2946 continue;
2947
2948 skb = skb_peek(&tmp->data_q);
2949 if (skb->priority < cur_prio)
2950 continue;
2951
2952 if (skb->priority > cur_prio) {
2953 num = 0;
2954 min = ~0;
2955 cur_prio = skb->priority;
2956 }
2957
2958 num++;
2959
2960 if (conn->sent < min) {
2961 min = conn->sent;
2962 chan = tmp;
2963 }
2964 }
2965
2966 if (hci_conn_num(hdev, type) == conn_num)
2967 break;
2968 }
2969
bf4c6325
GP		 2970 rcu_read_unlock();
2971
73d80deb
LAD		 2972 if (!chan)
2973 return NULL;
2974
2975 switch (chan->conn->type) {
2976 case ACL_LINK:
2977 cnt = hdev->acl_cnt;
2978 break;
bd1eb66b
AE		 2979 case AMP_LINK:
2980 cnt = hdev->block_cnt;
2981 break;
73d80deb
LAD		 2982 case SCO_LINK:
2983 case ESCO_LINK:
2984 cnt = hdev->sco_cnt;
2985 break;
2986 case LE_LINK:
2987 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2988 break;
2989 default:
2990 cnt = 0;
2991 BT_ERR("Unknown link type");
2992 }
2993
2994 q = cnt / num;
2995 *quote = q ? q : 1;
2996 BT_DBG("chan %p quote %d", chan, *quote);
2997 return chan;
2998}
2999
02b20f0b
LAD		 3000static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3001{
3002 struct hci_conn_hash *h = &hdev->conn_hash;
3003 struct hci_conn *conn;
3004 int num = 0;
3005
3006 BT_DBG("%s", hdev->name);
3007
bf4c6325
GP		 3008 rcu_read_lock();
3009
3010 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3011 struct hci_chan *chan;
3012
3013 if (conn->type != type)
3014 continue;
3015
3016 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3017 continue;
3018
3019 num++;
3020
8192edef 3021 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3022 struct sk_buff *skb;
3023
3024 if (chan->sent) {
3025 chan->sent = 0;
3026 continue;
3027 }
3028
3029 if (skb_queue_empty(&chan->data_q))
3030 continue;
3031
3032 skb = skb_peek(&chan->data_q);
3033 if (skb->priority >= HCI_PRIO_MAX - 1)
3034 continue;
3035
3036 skb->priority = HCI_PRIO_MAX - 1;
3037
3038 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3039 skb->priority);
02b20f0b
LAD		 3040 }
3041
3042 if (hci_conn_num(hdev, type) == num)
3043 break;
3044 }
bf4c6325
GP		 3045
3046 rcu_read_unlock();
3047
02b20f0b
LAD		 3048}
3049
b71d385a
AE		 3050static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3051{
3052 /* Calculate count of blocks used by this packet */
3053 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3054}
3055
6039aa73 3056static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3057{
1da177e4
LT		 3058 if (!test_bit(HCI_RAW, &hdev->flags)) {
3059 /* ACL tx timeout must be longer than maximum
3060 * link supervision timeout (40.9 seconds) */
63d2bc1b 3061 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3062 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3063 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3064 }
63d2bc1b 3065}
1da177e4 3066
6039aa73 3067static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3068{
3069 unsigned int cnt = hdev->acl_cnt;
3070 struct hci_chan *chan;
3071 struct sk_buff *skb;
3072 int quote;
3073
3074 __check_timeout(hdev, cnt);
04837f64 3075
73d80deb 3076 while (hdev->acl_cnt &&
a8c5fb1a 3077 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3078 u32 priority = (skb_peek(&chan->data_q))->priority;
3079 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3080 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3081 skb->len, skb->priority);
73d80deb 3082
ec1cce24
LAD		 3083 /* Stop if priority has changed */
3084 if (skb->priority < priority)
3085 break;
3086
3087 skb = skb_dequeue(&chan->data_q);
3088
73d80deb 3089 hci_conn_enter_active_mode(chan->conn,
04124681 3090 bt_cb(skb)->force_active);
04837f64 3091
1da177e4
LT		 3092 hci_send_frame(skb);
3093 hdev->acl_last_tx = jiffies;
3094
3095 hdev->acl_cnt--;
73d80deb
LAD		 3096 chan->sent++;
3097 chan->conn->sent++;
1da177e4
LT		 3098 }
3099 }
02b20f0b
LAD		 3100
3101 if (cnt != hdev->acl_cnt)
3102 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3103}
3104
6039aa73 3105static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3106{
63d2bc1b 3107 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3108 struct hci_chan *chan;
3109 struct sk_buff *skb;
3110 int quote;
bd1eb66b 3111 u8 type;
b71d385a 3112
63d2bc1b 3113 __check_timeout(hdev, cnt);
b71d385a 3114
bd1eb66b
AE		 3115 BT_DBG("%s", hdev->name);
3116
3117 if (hdev->dev_type == HCI_AMP)
3118 type = AMP_LINK;
3119 else
3120 type = ACL_LINK;
3121
b71d385a 3122 while (hdev->block_cnt > 0 &&
bd1eb66b 3123 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3124 u32 priority = (skb_peek(&chan->data_q))->priority;
3125 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3126 int blocks;
3127
3128 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3129 skb->len, skb->priority);
b71d385a
AE		 3130
3131 /* Stop if priority has changed */
3132 if (skb->priority < priority)
3133 break;
3134
3135 skb = skb_dequeue(&chan->data_q);
3136
3137 blocks = __get_blocks(hdev, skb);
3138 if (blocks > hdev->block_cnt)
3139 return;
3140
3141 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3142 bt_cb(skb)->force_active);
b71d385a
AE		 3143
3144 hci_send_frame(skb);
3145 hdev->acl_last_tx = jiffies;
3146
3147 hdev->block_cnt -= blocks;
3148 quote -= blocks;
3149
3150 chan->sent += blocks;
3151 chan->conn->sent += blocks;
3152 }
3153 }
3154
3155 if (cnt != hdev->block_cnt)
bd1eb66b 3156 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3157}
3158
6039aa73 3159static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3160{
3161 BT_DBG("%s", hdev->name);
3162
bd1eb66b
AE		 3163 /* No ACL link over BR/EDR controller */
3164 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3165 return;
3166
3167 /* No AMP link over AMP controller */
3168 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3169 return;
3170
3171 switch (hdev->flow_ctl_mode) {
3172 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3173 hci_sched_acl_pkt(hdev);
3174 break;
3175
3176 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3177 hci_sched_acl_blk(hdev);
3178 break;
3179 }
3180}
3181
1da177e4 3182/* Schedule SCO */
6039aa73 3183static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3184{
3185 struct hci_conn *conn;
3186 struct sk_buff *skb;
3187 int quote;
3188
3189 BT_DBG("%s", hdev->name);
3190
52087a79
LAD		 3191 if (!hci_conn_num(hdev, SCO_LINK))
3192 return;
3193
1da177e4
LT		 3194 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3195 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3196 BT_DBG("skb %p len %d", skb, skb->len);
3197 hci_send_frame(skb);
3198
3199 conn->sent++;
3200 if (conn->sent == ~0)
3201 conn->sent = 0;
3202 }
3203 }
3204}
3205
6039aa73 3206static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3207{
3208 struct hci_conn *conn;
3209 struct sk_buff *skb;
3210 int quote;
3211
3212 BT_DBG("%s", hdev->name);
3213
52087a79
LAD		 3214 if (!hci_conn_num(hdev, ESCO_LINK))
3215 return;
3216
8fc9ced3
GP		 3217 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3218 &quote))) {
b6a0dc82
MH		 3219 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3220 BT_DBG("skb %p len %d", skb, skb->len);
3221 hci_send_frame(skb);
3222
3223 conn->sent++;
3224 if (conn->sent == ~0)
3225 conn->sent = 0;
3226 }
3227 }
3228}
3229
6039aa73 3230static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3231{
73d80deb 3232 struct hci_chan *chan;
6ed58ec5 3233 struct sk_buff *skb;
02b20f0b 3234 int quote, cnt, tmp;
6ed58ec5
VT		 3235
3236 BT_DBG("%s", hdev->name);
3237
52087a79
LAD		 3238 if (!hci_conn_num(hdev, LE_LINK))
3239 return;
3240
6ed58ec5
VT		 3241 if (!test_bit(HCI_RAW, &hdev->flags)) {
3242 /* LE tx timeout must be longer than maximum
3243 * link supervision timeout (40.9 seconds) */
bae1f5d9 3244 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3245 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3246 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3247 }
3248
3249 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3250 tmp = cnt;
73d80deb 3251 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3252 u32 priority = (skb_peek(&chan->data_q))->priority;
3253 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3254 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3255 skb->len, skb->priority);
6ed58ec5 3256
ec1cce24
LAD		 3257 /* Stop if priority has changed */
3258 if (skb->priority < priority)
3259 break;
3260
3261 skb = skb_dequeue(&chan->data_q);
3262
6ed58ec5
VT		 3263 hci_send_frame(skb);
3264 hdev->le_last_tx = jiffies;
3265
3266 cnt--;
73d80deb
LAD		 3267 chan->sent++;
3268 chan->conn->sent++;
6ed58ec5
VT		 3269 }
3270 }
73d80deb 3271
6ed58ec5
VT		 3272 if (hdev->le_pkts)
3273 hdev->le_cnt = cnt;
3274 else
3275 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3276
3277 if (cnt != tmp)
3278 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3279}
3280
3eff45ea 3281static void hci_tx_work(struct work_struct *work)
1da177e4 3282{
3eff45ea 3283 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3284 struct sk_buff *skb;
3285
6ed58ec5 3286 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3287 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 3288
3289 /* Schedule queues and send stuff to HCI driver */
3290
3291 hci_sched_acl(hdev);
3292
3293 hci_sched_sco(hdev);
3294
b6a0dc82
MH		 3295 hci_sched_esco(hdev);
3296
6ed58ec5
VT		 3297 hci_sched_le(hdev);
3298
1da177e4
LT		 3299 /* Send next queued raw (unknown type) packet */
3300 while ((skb = skb_dequeue(&hdev->raw_q)))
3301 hci_send_frame(skb);
1da177e4
LT		 3302}
3303
25985edc 3304/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3305
3306/* ACL data packet */
6039aa73 3307static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3308{
3309 struct hci_acl_hdr *hdr = (void *) skb->data;
3310 struct hci_conn *conn;
3311 __u16 handle, flags;
3312
3313 skb_pull(skb, HCI_ACL_HDR_SIZE);
3314
3315 handle = __le16_to_cpu(hdr->handle);
3316 flags = hci_flags(handle);
3317 handle = hci_handle(handle);
3318
f0e09510 3319 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3320 handle, flags);
1da177e4
LT		 3321
3322 hdev->stat.acl_rx++;
3323
3324 hci_dev_lock(hdev);
3325 conn = hci_conn_hash_lookup_handle(hdev, handle);
3326 hci_dev_unlock(hdev);
8e87d142 3327
1da177e4 3328 if (conn) {
65983fc7 3329 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3330
1da177e4 3331 /* Send to upper protocol */
686ebf28
UF		 3332 l2cap_recv_acldata(conn, skb, flags);
3333 return;
1da177e4 3334 } else {
8e87d142 3335 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3336 hdev->name, handle);
1da177e4
LT		 3337 }
3338
3339 kfree_skb(skb);
3340}
3341
3342/* SCO data packet */
6039aa73 3343static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3344{
3345 struct hci_sco_hdr *hdr = (void *) skb->data;
3346 struct hci_conn *conn;
3347 __u16 handle;
3348
3349 skb_pull(skb, HCI_SCO_HDR_SIZE);
3350
3351 handle = __le16_to_cpu(hdr->handle);
3352
f0e09510 3353 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3354
3355 hdev->stat.sco_rx++;
3356
3357 hci_dev_lock(hdev);
3358 conn = hci_conn_hash_lookup_handle(hdev, handle);
3359 hci_dev_unlock(hdev);
3360
3361 if (conn) {
1da177e4 3362 /* Send to upper protocol */
686ebf28
UF		 3363 sco_recv_scodata(conn, skb);
3364 return;
1da177e4 3365 } else {
8e87d142 3366 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3367 hdev->name, handle);
1da177e4
LT		 3368 }
3369
3370 kfree_skb(skb);
3371}
3372
9238f36a
JH		 3373static bool hci_req_is_complete(struct hci_dev *hdev)
3374{
3375 struct sk_buff *skb;
3376
3377 skb = skb_peek(&hdev->cmd_q);
3378 if (!skb)
3379 return true;
3380
3381 return bt_cb(skb)->req.start;
3382}
3383
42c6b129
JH		 3384static void hci_resend_last(struct hci_dev *hdev)
3385{
3386 struct hci_command_hdr *sent;
3387 struct sk_buff *skb;
3388 u16 opcode;
3389
3390 if (!hdev->sent_cmd)
3391 return;
3392
3393 sent = (void *) hdev->sent_cmd->data;
3394 opcode = __le16_to_cpu(sent->opcode);
3395 if (opcode == HCI_OP_RESET)
3396 return;
3397
3398 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3399 if (!skb)
3400 return;
3401
3402 skb_queue_head(&hdev->cmd_q, skb);
3403 queue_work(hdev->workqueue, &hdev->cmd_work);
3404}
3405
9238f36a
JH		 3406void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3407{
3408 hci_req_complete_t req_complete = NULL;
3409 struct sk_buff *skb;
3410 unsigned long flags;
3411
3412 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3413
42c6b129
JH		 3414 /* If the completed command doesn't match the last one that was
3415 * sent we need to do special handling of it.
9238f36a 3416 */
42c6b129
JH		 3417 if (!hci_sent_cmd_data(hdev, opcode)) {
3418 /* Some CSR based controllers generate a spontaneous
3419 * reset complete event during init and any pending
3420 * command will never be completed. In such a case we
3421 * need to resend whatever was the last sent
3422 * command.
3423 */
3424 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3425 hci_resend_last(hdev);
3426
9238f36a 3427 return;
42c6b129 3428 }
9238f36a
JH		 3429
3430 /* If the command succeeded and there's still more commands in
3431 * this request the request is not yet complete.
3432 */
3433 if (!status && !hci_req_is_complete(hdev))
3434 return;
3435
3436 /* If this was the last command in a request the complete
3437 * callback would be found in hdev->sent_cmd instead of the
3438 * command queue (hdev->cmd_q).
3439 */
3440 if (hdev->sent_cmd) {
3441 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
3442 if (req_complete)
3443 goto call_complete;
3444 }
3445
3446 /* Remove all pending commands belonging to this request */
3447 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3448 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3449 if (bt_cb(skb)->req.start) {
3450 __skb_queue_head(&hdev->cmd_q, skb);
3451 break;
3452 }
3453
3454 req_complete = bt_cb(skb)->req.complete;
3455 kfree_skb(skb);
3456 }
3457 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3458
3459call_complete:
3460 if (req_complete)
3461 req_complete(hdev, status);
3462}
3463
b78752cc 3464static void hci_rx_work(struct work_struct *work)
1da177e4 3465{
b78752cc 3466 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3467 struct sk_buff *skb;
3468
3469 BT_DBG("%s", hdev->name);
3470
1da177e4 3471 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3472 /* Send copy to monitor */
3473 hci_send_to_monitor(hdev, skb);
3474
1da177e4
LT		 3475 if (atomic_read(&hdev->promisc)) {
3476 /* Send copy to the sockets */
470fe1b5 3477 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3478 }
3479
3480 if (test_bit(HCI_RAW, &hdev->flags)) {
3481 kfree_skb(skb);
3482 continue;
3483 }
3484
3485 if (test_bit(HCI_INIT, &hdev->flags)) {
3486 /* Don't process data packets in this states. */
0d48d939 3487 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3488 case HCI_ACLDATA_PKT:
3489 case HCI_SCODATA_PKT:
3490 kfree_skb(skb);
3491 continue;
3ff50b79 3492 }
1da177e4
LT		 3493 }
3494
3495 /* Process frame */
0d48d939 3496 switch (bt_cb(skb)->pkt_type) {
1da177e4 3497 case HCI_EVENT_PKT:
b78752cc 3498 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3499 hci_event_packet(hdev, skb);
3500 break;
3501
3502 case HCI_ACLDATA_PKT:
3503 BT_DBG("%s ACL data packet", hdev->name);
3504 hci_acldata_packet(hdev, skb);
3505 break;
3506
3507 case HCI_SCODATA_PKT:
3508 BT_DBG("%s SCO data packet", hdev->name);
3509 hci_scodata_packet(hdev, skb);
3510 break;
3511
3512 default:
3513 kfree_skb(skb);
3514 break;
3515 }
3516 }
1da177e4
LT		 3517}
3518
c347b765 3519static void hci_cmd_work(struct work_struct *work)
1da177e4 3520{
c347b765 3521 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3522 struct sk_buff *skb;
3523
2104786b
AE		 3524 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3525 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3526
1da177e4 3527 /* Send queued commands */
5a08ecce
AE		 3528 if (atomic_read(&hdev->cmd_cnt)) {
3529 skb = skb_dequeue(&hdev->cmd_q);
3530 if (!skb)
3531 return;
3532
7585b97a 3533 kfree_skb(hdev->sent_cmd);
1da177e4 3534
70f23020
AE		 3535 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3536 if (hdev->sent_cmd) {
1da177e4
LT		 3537 atomic_dec(&hdev->cmd_cnt);
3538 hci_send_frame(skb);
7bdb8a5c
SJ		 3539 if (test_bit(HCI_RESET, &hdev->flags))
3540 del_timer(&hdev->cmd_timer);
3541 else
3542 mod_timer(&hdev->cmd_timer,
5f246e89 3543 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3544 } else {
3545 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3546 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3547 }
3548 }
3549}
2519a1fc
AG		 3550
3551int hci_do_inquiry(struct hci_dev *hdev, u8 length)
3552{
3553 /* General inquiry access code (GIAC) */
3554 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3555 struct hci_cp_inquiry cp;
3556
3557 BT_DBG("%s", hdev->name);
3558
3559 if (test_bit(HCI_INQUIRY, &hdev->flags))
3560 return -EINPROGRESS;
3561
4663262c
JH		 3562 inquiry_cache_flush(hdev);
3563
2519a1fc
AG		 3564 memset(&cp, 0, sizeof(cp));
3565 memcpy(&cp.lap, lap, sizeof(cp.lap));
3566 cp.length = length;
3567
3568 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
3569}
023d5049
AG		 3570
3571int hci_cancel_inquiry(struct hci_dev *hdev)
3572{
3573 BT_DBG("%s", hdev->name);
3574
3575 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 3576 return -EALREADY;
023d5049
AG		 3577
3578 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
3579}
31f7956c
AG		 3580
3581u8 bdaddr_to_le(u8 bdaddr_type)
3582{
3583 switch (bdaddr_type) {
3584 case BDADDR_LE_PUBLIC:
3585 return ADDR_LE_DEV_PUBLIC;
3586
3587 default:
3588 /* Fallback to LE Random address type */
3589 return ADDR_LE_DEV_RANDOM;
3590 }
3591}
Linux kernel - Deliverables
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