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Bluetooth: Restrict ioctls to HCI raw channel sockets
[mirror_ubuntu-bionic-kernel.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 */
c7882cbd
MH		 457 } else {
458 /* Use a different default for LE-only devices */
459 memset(events, 0, sizeof(events));
460 events[0] |= 0x10; /* Disconnection Complete */
461 events[0] |= 0x80; /* Encryption Change */
462 events[1] |= 0x08; /* Read Remote Version Information Complete */
463 events[1] |= 0x20; /* Command Complete */
464 events[1] |= 0x40; /* Command Status */
465 events[1] |= 0x80; /* Hardware Error */
466 events[2] |= 0x04; /* Number of Completed Packets */
467 events[3] |= 0x02; /* Data Buffer Overflow */
468 events[5] |= 0x80; /* Encryption Key Refresh Complete */
2177bab5
JH		 469 }
470
471 if (lmp_inq_rssi_capable(hdev))
472 events[4] |= 0x02; /* Inquiry Result with RSSI */
473
474 if (lmp_sniffsubr_capable(hdev))
475 events[5] |= 0x20; /* Sniff Subrating */
476
477 if (lmp_pause_enc_capable(hdev))
478 events[5] |= 0x80; /* Encryption Key Refresh Complete */
479
480 if (lmp_ext_inq_capable(hdev))
481 events[5] |= 0x40; /* Extended Inquiry Result */
482
483 if (lmp_no_flush_capable(hdev))
484 events[7] |= 0x01; /* Enhanced Flush Complete */
485
486 if (lmp_lsto_capable(hdev))
487 events[6] |= 0x80; /* Link Supervision Timeout Changed */
488
489 if (lmp_ssp_capable(hdev)) {
490 events[6] |= 0x01; /* IO Capability Request */
491 events[6] |= 0x02; /* IO Capability Response */
492 events[6] |= 0x04; /* User Confirmation Request */
493 events[6] |= 0x08; /* User Passkey Request */
494 events[6] |= 0x10; /* Remote OOB Data Request */
495 events[6] |= 0x20; /* Simple Pairing Complete */
496 events[7] |= 0x04; /* User Passkey Notification */
497 events[7] |= 0x08; /* Keypress Notification */
498 events[7] |= 0x10; /* Remote Host Supported
499 * Features Notification
500 */
501 }
502
503 if (lmp_le_capable(hdev))
504 events[7] |= 0x20; /* LE Meta-Event */
505
42c6b129 506 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 507
508 if (lmp_le_capable(hdev)) {
509 memset(events, 0, sizeof(events));
510 events[0] = 0x1f;
42c6b129
JH		 511 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
512 sizeof(events), events);
2177bab5
JH		 513 }
514}
515
42c6b129 516static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 517{
42c6b129
JH		 518 struct hci_dev *hdev = req->hdev;
519
2177bab5 520 if (lmp_bredr_capable(hdev))
42c6b129 521 bredr_setup(req);
2177bab5
JH		 522
523 if (lmp_le_capable(hdev))
42c6b129 524 le_setup(req);
2177bab5 525
42c6b129 526 hci_setup_event_mask(req);
2177bab5 527
3f8e2d75
JH		 528 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
529 * local supported commands HCI command.
530 */
531 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 532 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 533
534 if (lmp_ssp_capable(hdev)) {
535 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
536 u8 mode = 0x01;
42c6b129
JH		 537 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
538 sizeof(mode), &mode);
2177bab5
JH		 539 } else {
540 struct hci_cp_write_eir cp;
541
542 memset(hdev->eir, 0, sizeof(hdev->eir));
543 memset(&cp, 0, sizeof(cp));
544
42c6b129 545 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 546 }
547 }
548
549 if (lmp_inq_rssi_capable(hdev))
42c6b129 550 hci_setup_inquiry_mode(req);
2177bab5
JH		 551
552 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 553 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 554
555 if (lmp_ext_feat_capable(hdev)) {
556 struct hci_cp_read_local_ext_features cp;
557
558 cp.page = 0x01;
42c6b129
JH		 559 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
560 sizeof(cp), &cp);
2177bab5
JH		 561 }
562
563 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
564 u8 enable = 1;
42c6b129
JH		 565 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
566 &enable);
2177bab5
JH		 567 }
568}
569
42c6b129 570static void hci_setup_link_policy(struct hci_request *req)
2177bab5 571{
42c6b129 572 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 573 struct hci_cp_write_def_link_policy cp;
574 u16 link_policy = 0;
575
576 if (lmp_rswitch_capable(hdev))
577 link_policy |= HCI_LP_RSWITCH;
578 if (lmp_hold_capable(hdev))
579 link_policy |= HCI_LP_HOLD;
580 if (lmp_sniff_capable(hdev))
581 link_policy |= HCI_LP_SNIFF;
582 if (lmp_park_capable(hdev))
583 link_policy |= HCI_LP_PARK;
584
585 cp.policy = cpu_to_le16(link_policy);
42c6b129 586 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 587}
588
42c6b129 589static void hci_set_le_support(struct hci_request *req)
2177bab5 590{
42c6b129 591 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 592 struct hci_cp_write_le_host_supported cp;
593
c73eee91
JH		 594 /* LE-only devices do not support explicit enablement */
595 if (!lmp_bredr_capable(hdev))
596 return;
597
2177bab5
JH		 598 memset(&cp, 0, sizeof(cp));
599
600 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
601 cp.le = 0x01;
602 cp.simul = lmp_le_br_capable(hdev);
603 }
604
605 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 606 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
607 &cp);
2177bab5
JH		 608}
609
42c6b129 610static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 611{
42c6b129 612 struct hci_dev *hdev = req->hdev;
d2c5d77f 613 u8 p;
42c6b129 614
b8f4e068
GP		 615 /* Some Broadcom based Bluetooth controllers do not support the
616 * Delete Stored Link Key command. They are clearly indicating its
617 * absence in the bit mask of supported commands.
618 *
619 * Check the supported commands and only if the the command is marked
620 * as supported send it. If not supported assume that the controller
621 * does not have actual support for stored link keys which makes this
622 * command redundant anyway.
637b4cae 623 */
59f45d57
JH		 624 if (hdev->commands[6] & 0x80) {
625 struct hci_cp_delete_stored_link_key cp;
626
627 bacpy(&cp.bdaddr, BDADDR_ANY);
628 cp.delete_all = 0x01;
629 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
630 sizeof(cp), &cp);
631 }
632
2177bab5 633 if (hdev->commands[5] & 0x10)
42c6b129 634 hci_setup_link_policy(req);
2177bab5 635
04b4edcb 636 if (lmp_le_capable(hdev)) {
42c6b129 637 hci_set_le_support(req);
04b4edcb
JH		 638 hci_update_ad(req);
639 }
d2c5d77f
JH		 640
641 /* Read features beyond page 1 if available */
642 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
643 struct hci_cp_read_local_ext_features cp;
644
645 cp.page = p;
646 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
647 sizeof(cp), &cp);
648 }
2177bab5
JH		 649}
650
651static int __hci_init(struct hci_dev *hdev)
652{
653 int err;
654
655 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
656 if (err < 0)
657 return err;
658
659 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
660 * BR/EDR/LE type controllers. AMP controllers only need the
661 * first stage init.
662 */
663 if (hdev->dev_type != HCI_BREDR)
664 return 0;
665
666 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
667 if (err < 0)
668 return err;
669
670 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
671}
672
42c6b129 673static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 674{
675 __u8 scan = opt;
676
42c6b129 677 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 678
679 /* Inquiry and Page scans */
42c6b129 680 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 681}
682
42c6b129 683static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 684{
685 __u8 auth = opt;
686
42c6b129 687 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 688
689 /* Authentication */
42c6b129 690 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 691}
692
42c6b129 693static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 694{
695 __u8 encrypt = opt;
696
42c6b129 697 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 698
e4e8e37c 699 /* Encryption */
42c6b129 700 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 701}
702
42c6b129 703static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 704{
705 __le16 policy = cpu_to_le16(opt);
706
42c6b129 707 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 708
709 /* Default link policy */
42c6b129 710 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 711}
712
8e87d142 713/* Get HCI device by index.
1da177e4
LT		 714 * Device is held on return. */
715struct hci_dev *hci_dev_get(int index)
716{
8035ded4 717 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 718
719 BT_DBG("%d", index);
720
721 if (index < 0)
722 return NULL;
723
724 read_lock(&hci_dev_list_lock);
8035ded4 725 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 726 if (d->id == index) {
727 hdev = hci_dev_hold(d);
728 break;
729 }
730 }
731 read_unlock(&hci_dev_list_lock);
732 return hdev;
733}
1da177e4
LT		 734
735/* ---- Inquiry support ---- */
ff9ef578 736
30dc78e1
JH		 737bool hci_discovery_active(struct hci_dev *hdev)
738{
739 struct discovery_state *discov = &hdev->discovery;
740
6fbe195d 741 switch (discov->state) {
343f935b 742 case DISCOVERY_FINDING:
6fbe195d 743 case DISCOVERY_RESOLVING:
30dc78e1
JH		 744 return true;
745
6fbe195d
AG		 746 default:
747 return false;
748 }
30dc78e1
JH		 749}
750
ff9ef578
JH		 751void hci_discovery_set_state(struct hci_dev *hdev, int state)
752{
753 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
754
755 if (hdev->discovery.state == state)
756 return;
757
758 switch (state) {
759 case DISCOVERY_STOPPED:
7b99b659
AG		 760 if (hdev->discovery.state != DISCOVERY_STARTING)
761 mgmt_discovering(hdev, 0);
ff9ef578
JH		 762 break;
763 case DISCOVERY_STARTING:
764 break;
343f935b 765 case DISCOVERY_FINDING:
ff9ef578
JH		 766 mgmt_discovering(hdev, 1);
767 break;
30dc78e1
JH		 768 case DISCOVERY_RESOLVING:
769 break;
ff9ef578
JH		 770 case DISCOVERY_STOPPING:
771 break;
772 }
773
774 hdev->discovery.state = state;
775}
776
1f9b9a5d 777void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 778{
30883512 779 struct discovery_state *cache = &hdev->discovery;
b57c1a56 780 struct inquiry_entry *p, *n;
1da177e4 781
561aafbc
JH		 782 list_for_each_entry_safe(p, n, &cache->all, all) {
783 list_del(&p->all);
b57c1a56 784 kfree(p);
1da177e4 785 }
561aafbc
JH		 786
787 INIT_LIST_HEAD(&cache->unknown);
788 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 789}
790
a8c5fb1a
GP		 791struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
792 bdaddr_t *bdaddr)
1da177e4 793{
30883512 794 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 795 struct inquiry_entry *e;
796
6ed93dc6 797 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 798
561aafbc
JH		 799 list_for_each_entry(e, &cache->all, all) {
800 if (!bacmp(&e->data.bdaddr, bdaddr))
801 return e;
802 }
803
804 return NULL;
805}
806
807struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 808 bdaddr_t *bdaddr)
561aafbc 809{
30883512 810 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 811 struct inquiry_entry *e;
812
6ed93dc6 813 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 814
815 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 816 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 817 return e;
818 }
819
820 return NULL;
1da177e4
LT		 821}
822
30dc78e1 823struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 824 bdaddr_t *bdaddr,
825 int state)
30dc78e1
JH		 826{
827 struct discovery_state *cache = &hdev->discovery;
828 struct inquiry_entry *e;
829
6ed93dc6 830 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 831
832 list_for_each_entry(e, &cache->resolve, list) {
833 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
834 return e;
835 if (!bacmp(&e->data.bdaddr, bdaddr))
836 return e;
837 }
838
839 return NULL;
840}
841
a3d4e20a 842void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 843 struct inquiry_entry *ie)
a3d4e20a
JH		 844{
845 struct discovery_state *cache = &hdev->discovery;
846 struct list_head *pos = &cache->resolve;
847 struct inquiry_entry *p;
848
849 list_del(&ie->list);
850
851 list_for_each_entry(p, &cache->resolve, list) {
852 if (p->name_state != NAME_PENDING &&
a8c5fb1a 853 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 854 break;
855 pos = &p->list;
856 }
857
858 list_add(&ie->list, pos);
859}
860
3175405b 861bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 862 bool name_known, bool *ssp)
1da177e4 863{
30883512 864 struct discovery_state *cache = &hdev->discovery;
70f23020 865 struct inquiry_entry *ie;
1da177e4 866
6ed93dc6 867 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 868
2b2fec4d
SJ		 869 hci_remove_remote_oob_data(hdev, &data->bdaddr);
870
388fc8fa
JH		 871 if (ssp)
872 *ssp = data->ssp_mode;
873
70f23020 874 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 875 if (ie) {
388fc8fa
JH		 876 if (ie->data.ssp_mode && ssp)
877 *ssp = true;
878
a3d4e20a 879 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 880 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 881 ie->data.rssi = data->rssi;
882 hci_inquiry_cache_update_resolve(hdev, ie);
883 }
884
561aafbc 885 goto update;
a3d4e20a 886 }
561aafbc
JH		 887
888 /* Entry not in the cache. Add new one. */
889 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
890 if (!ie)
3175405b 891 return false;
561aafbc
JH		 892
893 list_add(&ie->all, &cache->all);
894
895 if (name_known) {
896 ie->name_state = NAME_KNOWN;
897 } else {
898 ie->name_state = NAME_NOT_KNOWN;
899 list_add(&ie->list, &cache->unknown);
900 }
70f23020 901
561aafbc
JH		 902update:
903 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 904 ie->name_state != NAME_PENDING) {
561aafbc
JH		 905 ie->name_state = NAME_KNOWN;
906 list_del(&ie->list);
1da177e4
LT		 907 }
908
70f23020
AE		 909 memcpy(&ie->data, data, sizeof(*data));
910 ie->timestamp = jiffies;
1da177e4 911 cache->timestamp = jiffies;
3175405b
JH		 912
913 if (ie->name_state == NAME_NOT_KNOWN)
914 return false;
915
916 return true;
1da177e4
LT		 917}
918
919static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
920{
30883512 921 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 922 struct inquiry_info *info = (struct inquiry_info *) buf;
923 struct inquiry_entry *e;
924 int copied = 0;
925
561aafbc 926 list_for_each_entry(e, &cache->all, all) {
1da177e4 927 struct inquiry_data *data = &e->data;
b57c1a56
JH		 928
929 if (copied >= num)
930 break;
931
1da177e4
LT		 932 bacpy(&info->bdaddr, &data->bdaddr);
933 info->pscan_rep_mode = data->pscan_rep_mode;
934 info->pscan_period_mode = data->pscan_period_mode;
935 info->pscan_mode = data->pscan_mode;
936 memcpy(info->dev_class, data->dev_class, 3);
937 info->clock_offset = data->clock_offset;
b57c1a56 938
1da177e4 939 info++;
b57c1a56 940 copied++;
1da177e4
LT		 941 }
942
943 BT_DBG("cache %p, copied %d", cache, copied);
944 return copied;
945}
946
42c6b129 947static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 948{
949 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 950 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 951 struct hci_cp_inquiry cp;
952
953 BT_DBG("%s", hdev->name);
954
955 if (test_bit(HCI_INQUIRY, &hdev->flags))
956 return;
957
958 /* Start Inquiry */
959 memcpy(&cp.lap, &ir->lap, 3);
960 cp.length = ir->length;
961 cp.num_rsp = ir->num_rsp;
42c6b129 962 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 963}
964
3e13fa1e
AG		 965static int wait_inquiry(void *word)
966{
967 schedule();
968 return signal_pending(current);
969}
970
1da177e4
LT		 971int hci_inquiry(void __user *arg)
972{
973 __u8 __user *ptr = arg;
974 struct hci_inquiry_req ir;
975 struct hci_dev *hdev;
976 int err = 0, do_inquiry = 0, max_rsp;
977 long timeo;
978 __u8 *buf;
979
980 if (copy_from_user(&ir, ptr, sizeof(ir)))
981 return -EFAULT;
982
5a08ecce
AE		 983 hdev = hci_dev_get(ir.dev_id);
984 if (!hdev)
1da177e4
LT		 985 return -ENODEV;
986
09fd0de5 987 hci_dev_lock(hdev);
8e87d142 988 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 989 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 990 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 991 do_inquiry = 1;
992 }
09fd0de5 993 hci_dev_unlock(hdev);
1da177e4 994
04837f64 995 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 996
997 if (do_inquiry) {
01178cd4
JH		 998 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
999 timeo);
70f23020
AE		 1000 if (err < 0)
1001 goto done;
3e13fa1e
AG		 1002
1003 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1004 * cleared). If it is interrupted by a signal, return -EINTR.
1005 */
1006 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
1007 TASK_INTERRUPTIBLE))
1008 return -EINTR;
70f23020 1009 }
1da177e4 1010
8fc9ced3
GP		 1011 /* for unlimited number of responses we will use buffer with
1012 * 255 entries
1013 */
1da177e4
LT		 1014 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1015
1016 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1017 * copy it to the user space.
1018 */
01df8c31 1019 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1020 if (!buf) {
1da177e4
LT		 1021 err = -ENOMEM;
1022 goto done;
1023 }
1024
09fd0de5 1025 hci_dev_lock(hdev);
1da177e4 1026 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1027 hci_dev_unlock(hdev);
1da177e4
LT		 1028
1029 BT_DBG("num_rsp %d", ir.num_rsp);
1030
1031 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1032 ptr += sizeof(ir);
1033 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1034 ir.num_rsp))
1da177e4 1035 err = -EFAULT;
8e87d142 1036 } else
1da177e4
LT		 1037 err = -EFAULT;
1038
1039 kfree(buf);
1040
1041done:
1042 hci_dev_put(hdev);
1043 return err;
1044}
1045
3f0f524b
JH		 1046static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1047{
1048 u8 ad_len = 0, flags = 0;
1049 size_t name_len;
1050
1051 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1052 flags |= LE_AD_GENERAL;
1053
1054 if (!lmp_bredr_capable(hdev))
1055 flags |= LE_AD_NO_BREDR;
1056
1057 if (lmp_le_br_capable(hdev))
1058 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1059
1060 if (lmp_host_le_br_capable(hdev))
1061 flags |= LE_AD_SIM_LE_BREDR_HOST;
1062
1063 if (flags) {
1064 BT_DBG("adv flags 0x%02x", flags);
1065
1066 ptr[0] = 2;
1067 ptr[1] = EIR_FLAGS;
1068 ptr[2] = flags;
1069
1070 ad_len += 3;
1071 ptr += 3;
1072 }
1073
1074 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1075 ptr[0] = 2;
1076 ptr[1] = EIR_TX_POWER;
1077 ptr[2] = (u8) hdev->adv_tx_power;
1078
1079 ad_len += 3;
1080 ptr += 3;
1081 }
1082
1083 name_len = strlen(hdev->dev_name);
1084 if (name_len > 0) {
1085 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1086
1087 if (name_len > max_len) {
1088 name_len = max_len;
1089 ptr[1] = EIR_NAME_SHORT;
1090 } else
1091 ptr[1] = EIR_NAME_COMPLETE;
1092
1093 ptr[0] = name_len + 1;
1094
1095 memcpy(ptr + 2, hdev->dev_name, name_len);
1096
1097 ad_len += (name_len + 2);
1098 ptr += (name_len + 2);
1099 }
1100
1101 return ad_len;
1102}
1103
04b4edcb 1104void hci_update_ad(struct hci_request *req)
3f0f524b 1105{
04b4edcb 1106 struct hci_dev *hdev = req->hdev;
3f0f524b
JH		 1107 struct hci_cp_le_set_adv_data cp;
1108 u8 len;
3f0f524b 1109
04b4edcb
JH		 1110 if (!lmp_le_capable(hdev))
1111 return;
3f0f524b
JH		 1112
1113 memset(&cp, 0, sizeof(cp));
1114
1115 len = create_ad(hdev, cp.data);
1116
1117 if (hdev->adv_data_len == len &&
04b4edcb
JH		 1118 memcmp(cp.data, hdev->adv_data, len) == 0)
1119 return;
3f0f524b
JH		 1120
1121 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1122 hdev->adv_data_len = len;
1123
1124 cp.length = len;
3f0f524b 1125
04b4edcb 1126 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH		 1127}
1128
1da177e4
LT		 1129/* ---- HCI ioctl helpers ---- */
1130
1131int hci_dev_open(__u16 dev)
1132{
1133 struct hci_dev *hdev;
1134 int ret = 0;
1135
5a08ecce
AE		 1136 hdev = hci_dev_get(dev);
1137 if (!hdev)
1da177e4
LT		 1138 return -ENODEV;
1139
1140 BT_DBG("%s %p", hdev->name, hdev);
1141
1142 hci_req_lock(hdev);
1143
94324962
JH		 1144 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1145 ret = -ENODEV;
1146 goto done;
1147 }
1148
611b30f7
MH		 1149 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
1150 ret = -ERFKILL;
1151 goto done;
1152 }
1153
1da177e4
LT		 1154 if (test_bit(HCI_UP, &hdev->flags)) {
1155 ret = -EALREADY;
1156 goto done;
1157 }
1158
1da177e4
LT		 1159 if (hdev->open(hdev)) {
1160 ret = -EIO;
1161 goto done;
1162 }
1163
f41c70c4
MH		 1164 atomic_set(&hdev->cmd_cnt, 1);
1165 set_bit(HCI_INIT, &hdev->flags);
1166
1167 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1168 ret = hdev->setup(hdev);
1169
1170 if (!ret) {
1171 /* Treat all non BR/EDR controllers as raw devices if
1172 * enable_hs is not set.
1173 */
1174 if (hdev->dev_type != HCI_BREDR && !enable_hs)
1175 set_bit(HCI_RAW, &hdev->flags);
1176
1177 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1178 set_bit(HCI_RAW, &hdev->flags);
1179
1180 if (!test_bit(HCI_RAW, &hdev->flags))
1181 ret = __hci_init(hdev);
1da177e4
LT		 1182 }
1183
f41c70c4
MH		 1184 clear_bit(HCI_INIT, &hdev->flags);
1185
1da177e4
LT		 1186 if (!ret) {
1187 hci_dev_hold(hdev);
1188 set_bit(HCI_UP, &hdev->flags);
1189 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a
AE		 1190 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1191 mgmt_valid_hdev(hdev)) {
09fd0de5 1192 hci_dev_lock(hdev);
744cf19e 1193 mgmt_powered(hdev, 1);
09fd0de5 1194 hci_dev_unlock(hdev);
56e5cb86 1195 }
8e87d142 1196 } else {
1da177e4 1197 /* Init failed, cleanup */
3eff45ea 1198 flush_work(&hdev->tx_work);
c347b765 1199 flush_work(&hdev->cmd_work);
b78752cc 1200 flush_work(&hdev->rx_work);
1da177e4
LT		 1201
1202 skb_queue_purge(&hdev->cmd_q);
1203 skb_queue_purge(&hdev->rx_q);
1204
1205 if (hdev->flush)
1206 hdev->flush(hdev);
1207
1208 if (hdev->sent_cmd) {
1209 kfree_skb(hdev->sent_cmd);
1210 hdev->sent_cmd = NULL;
1211 }
1212
1213 hdev->close(hdev);
1214 hdev->flags = 0;
1215 }
1216
1217done:
1218 hci_req_unlock(hdev);
1219 hci_dev_put(hdev);
1220 return ret;
1221}
1222
1223static int hci_dev_do_close(struct hci_dev *hdev)
1224{
1225 BT_DBG("%s %p", hdev->name, hdev);
1226
78c04c0b
VCG		 1227 cancel_delayed_work(&hdev->power_off);
1228
1da177e4
LT		 1229 hci_req_cancel(hdev, ENODEV);
1230 hci_req_lock(hdev);
1231
1232 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1233 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1234 hci_req_unlock(hdev);
1235 return 0;
1236 }
1237
3eff45ea
GP		 1238 /* Flush RX and TX works */
1239 flush_work(&hdev->tx_work);
b78752cc 1240 flush_work(&hdev->rx_work);
1da177e4 1241
16ab91ab 1242 if (hdev->discov_timeout > 0) {
e0f9309f 1243 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1244 hdev->discov_timeout = 0;
5e5282bb 1245 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1246 }
1247
a8b2d5c2 1248 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1249 cancel_delayed_work(&hdev->service_cache);
1250
7ba8b4be
AG		 1251 cancel_delayed_work_sync(&hdev->le_scan_disable);
1252
09fd0de5 1253 hci_dev_lock(hdev);
1f9b9a5d 1254 hci_inquiry_cache_flush(hdev);
1da177e4 1255 hci_conn_hash_flush(hdev);
09fd0de5 1256 hci_dev_unlock(hdev);
1da177e4
LT		 1257
1258 hci_notify(hdev, HCI_DEV_DOWN);
1259
1260 if (hdev->flush)
1261 hdev->flush(hdev);
1262
1263 /* Reset device */
1264 skb_queue_purge(&hdev->cmd_q);
1265 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1266 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1267 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1268 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1269 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1270 clear_bit(HCI_INIT, &hdev->flags);
1271 }
1272
c347b765
GP		 1273 /* flush cmd work */
1274 flush_work(&hdev->cmd_work);
1da177e4
LT		 1275
1276 /* Drop queues */
1277 skb_queue_purge(&hdev->rx_q);
1278 skb_queue_purge(&hdev->cmd_q);
1279 skb_queue_purge(&hdev->raw_q);
1280
1281 /* Drop last sent command */
1282 if (hdev->sent_cmd) {
b79f44c1 1283 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1284 kfree_skb(hdev->sent_cmd);
1285 hdev->sent_cmd = NULL;
1286 }
1287
b6ddb638
JH		 1288 kfree_skb(hdev->recv_evt);
1289 hdev->recv_evt = NULL;
1290
1da177e4
LT		 1291 /* After this point our queues are empty
1292 * and no tasks are scheduled. */
1293 hdev->close(hdev);
1294
35b973c9
JH		 1295 /* Clear flags */
1296 hdev->flags = 0;
1297 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1298
bb4b2a9a
AE		 1299 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1300 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 1301 hci_dev_lock(hdev);
1302 mgmt_powered(hdev, 0);
1303 hci_dev_unlock(hdev);
1304 }
5add6af8 1305
ced5c338
AE		 1306 /* Controller radio is available but is currently powered down */
1307 hdev->amp_status = 0;
1308
e59fda8d 1309 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1310 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1311
1da177e4
LT		 1312 hci_req_unlock(hdev);
1313
1314 hci_dev_put(hdev);
1315 return 0;
1316}
1317
1318int hci_dev_close(__u16 dev)
1319{
1320 struct hci_dev *hdev;
1321 int err;
1322
70f23020
AE		 1323 hdev = hci_dev_get(dev);
1324 if (!hdev)
1da177e4 1325 return -ENODEV;
8ee56540
MH		 1326
1327 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1328 cancel_delayed_work(&hdev->power_off);
1329
1da177e4 1330 err = hci_dev_do_close(hdev);
8ee56540 1331
1da177e4
LT		 1332 hci_dev_put(hdev);
1333 return err;
1334}
1335
1336int hci_dev_reset(__u16 dev)
1337{
1338 struct hci_dev *hdev;
1339 int ret = 0;
1340
70f23020
AE		 1341 hdev = hci_dev_get(dev);
1342 if (!hdev)
1da177e4
LT		 1343 return -ENODEV;
1344
1345 hci_req_lock(hdev);
1da177e4 1346
808a049e
MH		 1347 if (!test_bit(HCI_UP, &hdev->flags)) {
1348 ret = -ENETDOWN;
1da177e4 1349 goto done;
808a049e 1350 }
1da177e4
LT		 1351
1352 /* Drop queues */
1353 skb_queue_purge(&hdev->rx_q);
1354 skb_queue_purge(&hdev->cmd_q);
1355
09fd0de5 1356 hci_dev_lock(hdev);
1f9b9a5d 1357 hci_inquiry_cache_flush(hdev);
1da177e4 1358 hci_conn_hash_flush(hdev);
09fd0de5 1359 hci_dev_unlock(hdev);
1da177e4
LT		 1360
1361 if (hdev->flush)
1362 hdev->flush(hdev);
1363
8e87d142 1364 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1365 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1366
1367 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1368 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1369
1370done:
1da177e4
LT		 1371 hci_req_unlock(hdev);
1372 hci_dev_put(hdev);
1373 return ret;
1374}
1375
1376int hci_dev_reset_stat(__u16 dev)
1377{
1378 struct hci_dev *hdev;
1379 int ret = 0;
1380
70f23020
AE		 1381 hdev = hci_dev_get(dev);
1382 if (!hdev)
1da177e4
LT		 1383 return -ENODEV;
1384
1385 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1386
1387 hci_dev_put(hdev);
1388
1389 return ret;
1390}
1391
1392int hci_dev_cmd(unsigned int cmd, void __user *arg)
1393{
1394 struct hci_dev *hdev;
1395 struct hci_dev_req dr;
1396 int err = 0;
1397
1398 if (copy_from_user(&dr, arg, sizeof(dr)))
1399 return -EFAULT;
1400
70f23020
AE		 1401 hdev = hci_dev_get(dr.dev_id);
1402 if (!hdev)
1da177e4
LT		 1403 return -ENODEV;
1404
1405 switch (cmd) {
1406 case HCISETAUTH:
01178cd4
JH		 1407 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1408 HCI_INIT_TIMEOUT);
1da177e4
LT		 1409 break;
1410
1411 case HCISETENCRYPT:
1412 if (!lmp_encrypt_capable(hdev)) {
1413 err = -EOPNOTSUPP;
1414 break;
1415 }
1416
1417 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1418 /* Auth must be enabled first */
01178cd4
JH		 1419 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1420 HCI_INIT_TIMEOUT);
1da177e4
LT		 1421 if (err)
1422 break;
1423 }
1424
01178cd4
JH		 1425 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1426 HCI_INIT_TIMEOUT);
1da177e4
LT		 1427 break;
1428
1429 case HCISETSCAN:
01178cd4
JH		 1430 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1431 HCI_INIT_TIMEOUT);
1da177e4
LT		 1432 break;
1433
1da177e4 1434 case HCISETLINKPOL:
01178cd4
JH		 1435 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1436 HCI_INIT_TIMEOUT);
1da177e4
LT		 1437 break;
1438
1439 case HCISETLINKMODE:
e4e8e37c
MH		 1440 hdev->link_mode = ((__u16) dr.dev_opt) &
1441 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1442 break;
1443
1444 case HCISETPTYPE:
1445 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1446 break;
1447
1448 case HCISETACLMTU:
e4e8e37c
MH		 1449 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1450 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1451 break;
1452
1453 case HCISETSCOMTU:
e4e8e37c
MH		 1454 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1455 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1456 break;
1457
1458 default:
1459 err = -EINVAL;
1460 break;
1461 }
e4e8e37c 1462
1da177e4
LT		 1463 hci_dev_put(hdev);
1464 return err;
1465}
1466
1467int hci_get_dev_list(void __user *arg)
1468{
8035ded4 1469 struct hci_dev *hdev;
1da177e4
LT		 1470 struct hci_dev_list_req *dl;
1471 struct hci_dev_req *dr;
1da177e4
LT		 1472 int n = 0, size, err;
1473 __u16 dev_num;
1474
1475 if (get_user(dev_num, (__u16 __user *) arg))
1476 return -EFAULT;
1477
1478 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1479 return -EINVAL;
1480
1481 size = sizeof(*dl) + dev_num * sizeof(*dr);
1482
70f23020
AE		 1483 dl = kzalloc(size, GFP_KERNEL);
1484 if (!dl)
1da177e4
LT		 1485 return -ENOMEM;
1486
1487 dr = dl->dev_req;
1488
f20d09d5 1489 read_lock(&hci_dev_list_lock);
8035ded4 1490 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1491 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1492 cancel_delayed_work(&hdev->power_off);
c542a06c 1493
a8b2d5c2
JH		 1494 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1495 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1496
1da177e4
LT		 1497 (dr + n)->dev_id = hdev->id;
1498 (dr + n)->dev_opt = hdev->flags;
c542a06c 1499
1da177e4
LT		 1500 if (++n >= dev_num)
1501 break;
1502 }
f20d09d5 1503 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1504
1505 dl->dev_num = n;
1506 size = sizeof(*dl) + n * sizeof(*dr);
1507
1508 err = copy_to_user(arg, dl, size);
1509 kfree(dl);
1510
1511 return err ? -EFAULT : 0;
1512}
1513
1514int hci_get_dev_info(void __user *arg)
1515{
1516 struct hci_dev *hdev;
1517 struct hci_dev_info di;
1518 int err = 0;
1519
1520 if (copy_from_user(&di, arg, sizeof(di)))
1521 return -EFAULT;
1522
70f23020
AE		 1523 hdev = hci_dev_get(di.dev_id);
1524 if (!hdev)
1da177e4
LT		 1525 return -ENODEV;
1526
a8b2d5c2 1527 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1528 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1529
a8b2d5c2
JH		 1530 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1531 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1532
1da177e4
LT		 1533 strcpy(di.name, hdev->name);
1534 di.bdaddr = hdev->bdaddr;
943da25d 1535 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1536 di.flags = hdev->flags;
1537 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1538 if (lmp_bredr_capable(hdev)) {
1539 di.acl_mtu = hdev->acl_mtu;
1540 di.acl_pkts = hdev->acl_pkts;
1541 di.sco_mtu = hdev->sco_mtu;
1542 di.sco_pkts = hdev->sco_pkts;
1543 } else {
1544 di.acl_mtu = hdev->le_mtu;
1545 di.acl_pkts = hdev->le_pkts;
1546 di.sco_mtu = 0;
1547 di.sco_pkts = 0;
1548 }
1da177e4
LT		 1549 di.link_policy = hdev->link_policy;
1550 di.link_mode = hdev->link_mode;
1551
1552 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1553 memcpy(&di.features, &hdev->features, sizeof(di.features));
1554
1555 if (copy_to_user(arg, &di, sizeof(di)))
1556 err = -EFAULT;
1557
1558 hci_dev_put(hdev);
1559
1560 return err;
1561}
1562
1563/* ---- Interface to HCI drivers ---- */
1564
611b30f7
MH		 1565static int hci_rfkill_set_block(void *data, bool blocked)
1566{
1567 struct hci_dev *hdev = data;
1568
1569 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1570
1571 if (!blocked)
1572 return 0;
1573
1574 hci_dev_do_close(hdev);
1575
1576 return 0;
1577}
1578
1579static const struct rfkill_ops hci_rfkill_ops = {
1580 .set_block = hci_rfkill_set_block,
1581};
1582
ab81cbf9
JH		 1583static void hci_power_on(struct work_struct *work)
1584{
1585 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1586 int err;
ab81cbf9
JH		 1587
1588 BT_DBG("%s", hdev->name);
1589
96570ffc
JH		 1590 err = hci_dev_open(hdev->id);
1591 if (err < 0) {
1592 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1593 return;
96570ffc 1594 }
ab81cbf9 1595
a8b2d5c2 1596 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1597 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1598 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1599
a8b2d5c2 1600 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1601 mgmt_index_added(hdev);
ab81cbf9
JH		 1602}
1603
1604static void hci_power_off(struct work_struct *work)
1605{
3243553f 1606 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1607 power_off.work);
ab81cbf9
JH		 1608
1609 BT_DBG("%s", hdev->name);
1610
8ee56540 1611 hci_dev_do_close(hdev);
ab81cbf9
JH		 1612}
1613
16ab91ab
JH		 1614static void hci_discov_off(struct work_struct *work)
1615{
1616 struct hci_dev *hdev;
1617 u8 scan = SCAN_PAGE;
1618
1619 hdev = container_of(work, struct hci_dev, discov_off.work);
1620
1621 BT_DBG("%s", hdev->name);
1622
09fd0de5 1623 hci_dev_lock(hdev);
16ab91ab
JH		 1624
1625 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1626
1627 hdev->discov_timeout = 0;
1628
09fd0de5 1629 hci_dev_unlock(hdev);
16ab91ab
JH		 1630}
1631
2aeb9a1a
JH		 1632int hci_uuids_clear(struct hci_dev *hdev)
1633{
4821002c 1634 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1635
4821002c
JH		 1636 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1637 list_del(&uuid->list);
2aeb9a1a
JH		 1638 kfree(uuid);
1639 }
1640
1641 return 0;
1642}
1643
55ed8ca1
JH		 1644int hci_link_keys_clear(struct hci_dev *hdev)
1645{
1646 struct list_head *p, *n;
1647
1648 list_for_each_safe(p, n, &hdev->link_keys) {
1649 struct link_key *key;
1650
1651 key = list_entry(p, struct link_key, list);
1652
1653 list_del(p);
1654 kfree(key);
1655 }
1656
1657 return 0;
1658}
1659
b899efaf
VCG		 1660int hci_smp_ltks_clear(struct hci_dev *hdev)
1661{
1662 struct smp_ltk *k, *tmp;
1663
1664 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1665 list_del(&k->list);
1666 kfree(k);
1667 }
1668
1669 return 0;
1670}
1671
55ed8ca1
JH		 1672struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1673{
8035ded4 1674 struct link_key *k;
55ed8ca1 1675
8035ded4 1676 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1677 if (bacmp(bdaddr, &k->bdaddr) == 0)
1678 return k;
55ed8ca1
JH		 1679
1680 return NULL;
1681}
1682
745c0ce3 1683static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1684 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1685{
1686 /* Legacy key */
1687 if (key_type < 0x03)
745c0ce3 1688 return true;
d25e28ab
JH		 1689
1690 /* Debug keys are insecure so don't store them persistently */
1691 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1692 return false;
d25e28ab
JH		 1693
1694 /* Changed combination key and there's no previous one */
1695 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1696 return false;
d25e28ab
JH		 1697
1698 /* Security mode 3 case */
1699 if (!conn)
745c0ce3 1700 return true;
d25e28ab
JH		 1701
1702 /* Neither local nor remote side had no-bonding as requirement */
1703 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1704 return true;
d25e28ab
JH		 1705
1706 /* Local side had dedicated bonding as requirement */
1707 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1708 return true;
d25e28ab
JH		 1709
1710 /* Remote side had dedicated bonding as requirement */
1711 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1712 return true;
d25e28ab
JH		 1713
1714 /* If none of the above criteria match, then don't store the key
1715 * persistently */
745c0ce3 1716 return false;
d25e28ab
JH		 1717}
1718
c9839a11 1719struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1720{
c9839a11 1721 struct smp_ltk *k;
75d262c2 1722
c9839a11
VCG		 1723 list_for_each_entry(k, &hdev->long_term_keys, list) {
1724 if (k->ediv != ediv ||
a8c5fb1a 1725 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1726 continue;
1727
c9839a11 1728 return k;
75d262c2
VCG		 1729 }
1730
1731 return NULL;
1732}
75d262c2 1733
c9839a11 1734struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1735 u8 addr_type)
75d262c2 1736{
c9839a11 1737 struct smp_ltk *k;
75d262c2 1738
c9839a11
VCG		 1739 list_for_each_entry(k, &hdev->long_term_keys, list)
1740 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1741 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1742 return k;
1743
1744 return NULL;
1745}
75d262c2 1746
d25e28ab 1747int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1748 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1749{
1750 struct link_key *key, *old_key;
745c0ce3
VA		 1751 u8 old_key_type;
1752 bool persistent;
55ed8ca1
JH		 1753
1754 old_key = hci_find_link_key(hdev, bdaddr);
1755 if (old_key) {
1756 old_key_type = old_key->type;
1757 key = old_key;
1758 } else {
12adcf3a 1759 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1760 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1761 if (!key)
1762 return -ENOMEM;
1763 list_add(&key->list, &hdev->link_keys);
1764 }
1765
6ed93dc6 1766 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1767
d25e28ab
JH		 1768 /* Some buggy controller combinations generate a changed
1769 * combination key for legacy pairing even when there's no
1770 * previous key */
1771 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1772 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1773 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1774 if (conn)
1775 conn->key_type = type;
1776 }
d25e28ab 1777
55ed8ca1 1778 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1779 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1780 key->pin_len = pin_len;
1781
b6020ba0 1782 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1783 key->type = old_key_type;
4748fed2
JH		 1784 else
1785 key->type = type;
1786
4df378a1
JH		 1787 if (!new_key)
1788 return 0;
1789
1790 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1791
744cf19e 1792 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1793
6ec5bcad
VA		 1794 if (conn)
1795 conn->flush_key = !persistent;
55ed8ca1
JH		 1796
1797 return 0;
1798}
1799
c9839a11 1800int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1801 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1802 ediv, u8 rand[8])
75d262c2 1803{
c9839a11 1804 struct smp_ltk *key, *old_key;
75d262c2 1805
c9839a11
VCG		 1806 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1807 return 0;
75d262c2 1808
c9839a11
VCG		 1809 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1810 if (old_key)
75d262c2 1811 key = old_key;
c9839a11
VCG		 1812 else {
1813 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1814 if (!key)
1815 return -ENOMEM;
c9839a11 1816 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1817 }
1818
75d262c2 1819 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1820 key->bdaddr_type = addr_type;
1821 memcpy(key->val, tk, sizeof(key->val));
1822 key->authenticated = authenticated;
1823 key->ediv = ediv;
1824 key->enc_size = enc_size;
1825 key->type = type;
1826 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1827
c9839a11
VCG		 1828 if (!new_key)
1829 return 0;
75d262c2 1830
261cc5aa
VCG		 1831 if (type & HCI_SMP_LTK)
1832 mgmt_new_ltk(hdev, key, 1);
1833
75d262c2
VCG		 1834 return 0;
1835}
1836
55ed8ca1
JH		 1837int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1838{
1839 struct link_key *key;
1840
1841 key = hci_find_link_key(hdev, bdaddr);
1842 if (!key)
1843 return -ENOENT;
1844
6ed93dc6 1845 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1846
1847 list_del(&key->list);
1848 kfree(key);
1849
1850 return 0;
1851}
1852
b899efaf
VCG		 1853int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1854{
1855 struct smp_ltk *k, *tmp;
1856
1857 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1858 if (bacmp(bdaddr, &k->bdaddr))
1859 continue;
1860
6ed93dc6 1861 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1862
1863 list_del(&k->list);
1864 kfree(k);
1865 }
1866
1867 return 0;
1868}
1869
6bd32326 1870/* HCI command timer function */
bda4f23a 1871static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1872{
1873 struct hci_dev *hdev = (void *) arg;
1874
bda4f23a
AE		 1875 if (hdev->sent_cmd) {
1876 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1877 u16 opcode = __le16_to_cpu(sent->opcode);
1878
1879 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1880 } else {
1881 BT_ERR("%s command tx timeout", hdev->name);
1882 }
1883
6bd32326 1884 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1885 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1886}
1887
2763eda6 1888struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1889 bdaddr_t *bdaddr)
2763eda6
SJ		 1890{
1891 struct oob_data *data;
1892
1893 list_for_each_entry(data, &hdev->remote_oob_data, list)
1894 if (bacmp(bdaddr, &data->bdaddr) == 0)
1895 return data;
1896
1897 return NULL;
1898}
1899
1900int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1901{
1902 struct oob_data *data;
1903
1904 data = hci_find_remote_oob_data(hdev, bdaddr);
1905 if (!data)
1906 return -ENOENT;
1907
6ed93dc6 1908 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1909
1910 list_del(&data->list);
1911 kfree(data);
1912
1913 return 0;
1914}
1915
1916int hci_remote_oob_data_clear(struct hci_dev *hdev)
1917{
1918 struct oob_data *data, *n;
1919
1920 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1921 list_del(&data->list);
1922 kfree(data);
1923 }
1924
1925 return 0;
1926}
1927
1928int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1929 u8 *randomizer)
2763eda6
SJ		 1930{
1931 struct oob_data *data;
1932
1933 data = hci_find_remote_oob_data(hdev, bdaddr);
1934
1935 if (!data) {
1936 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1937 if (!data)
1938 return -ENOMEM;
1939
1940 bacpy(&data->bdaddr, bdaddr);
1941 list_add(&data->list, &hdev->remote_oob_data);
1942 }
1943
1944 memcpy(data->hash, hash, sizeof(data->hash));
1945 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1946
6ed93dc6 1947 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1948
1949 return 0;
1950}
1951
04124681 1952struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1953{
8035ded4 1954 struct bdaddr_list *b;
b2a66aad 1955
8035ded4 1956 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1957 if (bacmp(bdaddr, &b->bdaddr) == 0)
1958 return b;
b2a66aad
AJ		 1959
1960 return NULL;
1961}
1962
1963int hci_blacklist_clear(struct hci_dev *hdev)
1964{
1965 struct list_head *p, *n;
1966
1967 list_for_each_safe(p, n, &hdev->blacklist) {
1968 struct bdaddr_list *b;
1969
1970 b = list_entry(p, struct bdaddr_list, list);
1971
1972 list_del(p);
1973 kfree(b);
1974 }
1975
1976 return 0;
1977}
1978
88c1fe4b 1979int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1980{
1981 struct bdaddr_list *entry;
b2a66aad
AJ		 1982
1983 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1984 return -EBADF;
1985
5e762444
AJ		 1986 if (hci_blacklist_lookup(hdev, bdaddr))
1987 return -EEXIST;
b2a66aad
AJ		 1988
1989 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1990 if (!entry)
1991 return -ENOMEM;
b2a66aad
AJ		 1992
1993 bacpy(&entry->bdaddr, bdaddr);
1994
1995 list_add(&entry->list, &hdev->blacklist);
1996
88c1fe4b 1997 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1998}
1999
88c1fe4b 2000int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2001{
2002 struct bdaddr_list *entry;
b2a66aad 2003
1ec918ce 2004 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 2005 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 2006
2007 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 2008 if (!entry)
5e762444 2009 return -ENOENT;
b2a66aad
AJ		 2010
2011 list_del(&entry->list);
2012 kfree(entry);
2013
88c1fe4b 2014 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 2015}
2016
4c87eaab 2017static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2018{
4c87eaab
AG		 2019 if (status) {
2020 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 2021
4c87eaab
AG		 2022 hci_dev_lock(hdev);
2023 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2024 hci_dev_unlock(hdev);
2025 return;
2026 }
7ba8b4be
AG		 2027}
2028
4c87eaab 2029static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2030{
4c87eaab
AG		 2031 /* General inquiry access code (GIAC) */
2032 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2033 struct hci_request req;
2034 struct hci_cp_inquiry cp;
7ba8b4be
AG		 2035 int err;
2036
4c87eaab
AG		 2037 if (status) {
2038 BT_ERR("Failed to disable LE scanning: status %d", status);
2039 return;
2040 }
7ba8b4be 2041
4c87eaab
AG		 2042 switch (hdev->discovery.type) {
2043 case DISCOV_TYPE_LE:
2044 hci_dev_lock(hdev);
2045 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2046 hci_dev_unlock(hdev);
2047 break;
7ba8b4be 2048
4c87eaab
AG		 2049 case DISCOV_TYPE_INTERLEAVED:
2050 hci_req_init(&req, hdev);
7ba8b4be 2051
4c87eaab
AG		 2052 memset(&cp, 0, sizeof(cp));
2053 memcpy(&cp.lap, lap, sizeof(cp.lap));
2054 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2055 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 2056
4c87eaab 2057 hci_dev_lock(hdev);
7dbfac1d 2058
4c87eaab 2059 hci_inquiry_cache_flush(hdev);
7dbfac1d 2060
4c87eaab
AG		 2061 err = hci_req_run(&req, inquiry_complete);
2062 if (err) {
2063 BT_ERR("Inquiry request failed: err %d", err);
2064 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2065 }
7dbfac1d 2066
4c87eaab
AG		 2067 hci_dev_unlock(hdev);
2068 break;
7dbfac1d 2069 }
7dbfac1d
AG		 2070}
2071
7ba8b4be
AG		 2072static void le_scan_disable_work(struct work_struct *work)
2073{
2074 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2075 le_scan_disable.work);
7ba8b4be 2076 struct hci_cp_le_set_scan_enable cp;
4c87eaab
AG		 2077 struct hci_request req;
2078 int err;
7ba8b4be
AG		 2079
2080 BT_DBG("%s", hdev->name);
2081
4c87eaab 2082 hci_req_init(&req, hdev);
28b75a89 2083
7ba8b4be 2084 memset(&cp, 0, sizeof(cp));
4c87eaab
AG		 2085 cp.enable = LE_SCAN_DISABLE;
2086 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
28b75a89 2087
4c87eaab
AG		 2088 err = hci_req_run(&req, le_scan_disable_work_complete);
2089 if (err)
2090 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 2091}
2092
9be0dab7
DH		 2093/* Alloc HCI device */
2094struct hci_dev *hci_alloc_dev(void)
2095{
2096 struct hci_dev *hdev;
2097
2098 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2099 if (!hdev)
2100 return NULL;
2101
b1b813d4
DH		 2102 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2103 hdev->esco_type = (ESCO_HV1);
2104 hdev->link_mode = (HCI_LM_ACCEPT);
2105 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 2106 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2107 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2108
b1b813d4
DH		 2109 hdev->sniff_max_interval = 800;
2110 hdev->sniff_min_interval = 80;
2111
2112 mutex_init(&hdev->lock);
2113 mutex_init(&hdev->req_lock);
2114
2115 INIT_LIST_HEAD(&hdev->mgmt_pending);
2116 INIT_LIST_HEAD(&hdev->blacklist);
2117 INIT_LIST_HEAD(&hdev->uuids);
2118 INIT_LIST_HEAD(&hdev->link_keys);
2119 INIT_LIST_HEAD(&hdev->long_term_keys);
2120 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 2121 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2122
2123 INIT_WORK(&hdev->rx_work, hci_rx_work);
2124 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2125 INIT_WORK(&hdev->tx_work, hci_tx_work);
2126 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 2127
b1b813d4
DH		 2128 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2129 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2130 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2131
b1b813d4
DH		 2132 skb_queue_head_init(&hdev->rx_q);
2133 skb_queue_head_init(&hdev->cmd_q);
2134 skb_queue_head_init(&hdev->raw_q);
2135
2136 init_waitqueue_head(&hdev->req_wait_q);
2137
bda4f23a 2138 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2139
b1b813d4
DH		 2140 hci_init_sysfs(hdev);
2141 discovery_init(hdev);
9be0dab7
DH		 2142
2143 return hdev;
2144}
2145EXPORT_SYMBOL(hci_alloc_dev);
2146
2147/* Free HCI device */
2148void hci_free_dev(struct hci_dev *hdev)
2149{
9be0dab7
DH		 2150 /* will free via device release */
2151 put_device(&hdev->dev);
2152}
2153EXPORT_SYMBOL(hci_free_dev);
2154
1da177e4
LT		 2155/* Register HCI device */
2156int hci_register_dev(struct hci_dev *hdev)
2157{
b1b813d4 2158 int id, error;
1da177e4 2159
010666a1 2160 if (!hdev->open || !hdev->close)
1da177e4
LT		 2161 return -EINVAL;
2162
08add513
MM		 2163 /* Do not allow HCI_AMP devices to register at index 0,
2164 * so the index can be used as the AMP controller ID.
2165 */
3df92b31
SL		 2166 switch (hdev->dev_type) {
2167 case HCI_BREDR:
2168 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2169 break;
2170 case HCI_AMP:
2171 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2172 break;
2173 default:
2174 return -EINVAL;
1da177e4 2175 }
8e87d142 2176
3df92b31
SL		 2177 if (id < 0)
2178 return id;
2179
1da177e4
LT		 2180 sprintf(hdev->name, "hci%d", id);
2181 hdev->id = id;
2d8b3a11
AE		 2182
2183 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2184
d8537548
KC		 2185 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2186 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 2187 if (!hdev->workqueue) {
2188 error = -ENOMEM;
2189 goto err;
2190 }
f48fd9c8 2191
d8537548
KC		 2192 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2193 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 2194 if (!hdev->req_workqueue) {
2195 destroy_workqueue(hdev->workqueue);
2196 error = -ENOMEM;
2197 goto err;
2198 }
2199
33ca954d
DH		 2200 error = hci_add_sysfs(hdev);
2201 if (error < 0)
2202 goto err_wqueue;
1da177e4 2203
611b30f7 2204 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2205 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2206 hdev);
611b30f7
MH		 2207 if (hdev->rfkill) {
2208 if (rfkill_register(hdev->rfkill) < 0) {
2209 rfkill_destroy(hdev->rfkill);
2210 hdev->rfkill = NULL;
2211 }
2212 }
2213
a8b2d5c2 2214 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 2215
2216 if (hdev->dev_type != HCI_AMP)
2217 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2218
fcee3377
GP		 2219 write_lock(&hci_dev_list_lock);
2220 list_add(&hdev->list, &hci_dev_list);
2221 write_unlock(&hci_dev_list_lock);
2222
1da177e4 2223 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2224 hci_dev_hold(hdev);
1da177e4 2225
19202573 2226 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2227
1da177e4 2228 return id;
f48fd9c8 2229
33ca954d
DH		 2230err_wqueue:
2231 destroy_workqueue(hdev->workqueue);
6ead1bbc 2232 destroy_workqueue(hdev->req_workqueue);
33ca954d 2233err:
3df92b31 2234 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 2235
33ca954d 2236 return error;
1da177e4
LT		 2237}
2238EXPORT_SYMBOL(hci_register_dev);
2239
2240/* Unregister HCI device */
59735631 2241void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2242{
3df92b31 2243 int i, id;
ef222013 2244
c13854ce 2245 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2246
94324962
JH		 2247 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2248
3df92b31
SL		 2249 id = hdev->id;
2250
f20d09d5 2251 write_lock(&hci_dev_list_lock);
1da177e4 2252 list_del(&hdev->list);
f20d09d5 2253 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2254
2255 hci_dev_do_close(hdev);
2256
cd4c5391 2257 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2258 kfree_skb(hdev->reassembly[i]);
2259
b9b5ef18
GP		 2260 cancel_work_sync(&hdev->power_on);
2261
ab81cbf9 2262 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2263 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2264 hci_dev_lock(hdev);
744cf19e 2265 mgmt_index_removed(hdev);
09fd0de5 2266 hci_dev_unlock(hdev);
56e5cb86 2267 }
ab81cbf9 2268
2e58ef3e
JH		 2269 /* mgmt_index_removed should take care of emptying the
2270 * pending list */
2271 BUG_ON(!list_empty(&hdev->mgmt_pending));
2272
1da177e4
LT		 2273 hci_notify(hdev, HCI_DEV_UNREG);
2274
611b30f7
MH		 2275 if (hdev->rfkill) {
2276 rfkill_unregister(hdev->rfkill);
2277 rfkill_destroy(hdev->rfkill);
2278 }
2279
ce242970 2280 hci_del_sysfs(hdev);
147e2d59 2281
f48fd9c8 2282 destroy_workqueue(hdev->workqueue);
6ead1bbc 2283 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2284
09fd0de5 2285 hci_dev_lock(hdev);
e2e0cacb 2286 hci_blacklist_clear(hdev);
2aeb9a1a 2287 hci_uuids_clear(hdev);
55ed8ca1 2288 hci_link_keys_clear(hdev);
b899efaf 2289 hci_smp_ltks_clear(hdev);
2763eda6 2290 hci_remote_oob_data_clear(hdev);
09fd0de5 2291 hci_dev_unlock(hdev);
e2e0cacb 2292
dc946bd8 2293 hci_dev_put(hdev);
3df92b31
SL		 2294
2295 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2296}
2297EXPORT_SYMBOL(hci_unregister_dev);
2298
2299/* Suspend HCI device */
2300int hci_suspend_dev(struct hci_dev *hdev)
2301{
2302 hci_notify(hdev, HCI_DEV_SUSPEND);
2303 return 0;
2304}
2305EXPORT_SYMBOL(hci_suspend_dev);
2306
2307/* Resume HCI device */
2308int hci_resume_dev(struct hci_dev *hdev)
2309{
2310 hci_notify(hdev, HCI_DEV_RESUME);
2311 return 0;
2312}
2313EXPORT_SYMBOL(hci_resume_dev);
2314
76bca880
MH		 2315/* Receive frame from HCI drivers */
2316int hci_recv_frame(struct sk_buff *skb)
2317{
2318 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2319 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2320 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2321 kfree_skb(skb);
2322 return -ENXIO;
2323 }
2324
d82603c6 2325 /* Incoming skb */
76bca880
MH		 2326 bt_cb(skb)->incoming = 1;
2327
2328 /* Time stamp */
2329 __net_timestamp(skb);
2330
76bca880 2331 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2332 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2333
76bca880
MH		 2334 return 0;
2335}
2336EXPORT_SYMBOL(hci_recv_frame);
2337
33e882a5 2338static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2339 int count, __u8 index)
33e882a5
SS		 2340{
2341 int len = 0;
2342 int hlen = 0;
2343 int remain = count;
2344 struct sk_buff *skb;
2345 struct bt_skb_cb *scb;
2346
2347 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2348 index >= NUM_REASSEMBLY)
33e882a5
SS		 2349 return -EILSEQ;
2350
2351 skb = hdev->reassembly[index];
2352
2353 if (!skb) {
2354 switch (type) {
2355 case HCI_ACLDATA_PKT:
2356 len = HCI_MAX_FRAME_SIZE;
2357 hlen = HCI_ACL_HDR_SIZE;
2358 break;
2359 case HCI_EVENT_PKT:
2360 len = HCI_MAX_EVENT_SIZE;
2361 hlen = HCI_EVENT_HDR_SIZE;
2362 break;
2363 case HCI_SCODATA_PKT:
2364 len = HCI_MAX_SCO_SIZE;
2365 hlen = HCI_SCO_HDR_SIZE;
2366 break;
2367 }
2368
1e429f38 2369 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2370 if (!skb)
2371 return -ENOMEM;
2372
2373 scb = (void *) skb->cb;
2374 scb->expect = hlen;
2375 scb->pkt_type = type;
2376
2377 skb->dev = (void *) hdev;
2378 hdev->reassembly[index] = skb;
2379 }
2380
2381 while (count) {
2382 scb = (void *) skb->cb;
89bb46d0 2383 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2384
2385 memcpy(skb_put(skb, len), data, len);
2386
2387 count -= len;
2388 data += len;
2389 scb->expect -= len;
2390 remain = count;
2391
2392 switch (type) {
2393 case HCI_EVENT_PKT:
2394 if (skb->len == HCI_EVENT_HDR_SIZE) {
2395 struct hci_event_hdr *h = hci_event_hdr(skb);
2396 scb->expect = h->plen;
2397
2398 if (skb_tailroom(skb) < scb->expect) {
2399 kfree_skb(skb);
2400 hdev->reassembly[index] = NULL;
2401 return -ENOMEM;
2402 }
2403 }
2404 break;
2405
2406 case HCI_ACLDATA_PKT:
2407 if (skb->len == HCI_ACL_HDR_SIZE) {
2408 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2409 scb->expect = __le16_to_cpu(h->dlen);
2410
2411 if (skb_tailroom(skb) < scb->expect) {
2412 kfree_skb(skb);
2413 hdev->reassembly[index] = NULL;
2414 return -ENOMEM;
2415 }
2416 }
2417 break;
2418
2419 case HCI_SCODATA_PKT:
2420 if (skb->len == HCI_SCO_HDR_SIZE) {
2421 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2422 scb->expect = h->dlen;
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
2433 if (scb->expect == 0) {
2434 /* Complete frame */
2435
2436 bt_cb(skb)->pkt_type = type;
2437 hci_recv_frame(skb);
2438
2439 hdev->reassembly[index] = NULL;
2440 return remain;
2441 }
2442 }
2443
2444 return remain;
2445}
2446
ef222013
MH		 2447int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2448{
f39a3c06
SS		 2449 int rem = 0;
2450
ef222013
MH		 2451 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2452 return -EILSEQ;
2453
da5f6c37 2454 while (count) {
1e429f38 2455 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2456 if (rem < 0)
2457 return rem;
ef222013 2458
f39a3c06
SS		 2459 data += (count - rem);
2460 count = rem;
f81c6224 2461 }
ef222013 2462
f39a3c06 2463 return rem;
ef222013
MH		 2464}
2465EXPORT_SYMBOL(hci_recv_fragment);
2466
99811510
SS		 2467#define STREAM_REASSEMBLY 0
2468
2469int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2470{
2471 int type;
2472 int rem = 0;
2473
da5f6c37 2474 while (count) {
99811510
SS		 2475 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2476
2477 if (!skb) {
2478 struct { char type; } *pkt;
2479
2480 /* Start of the frame */
2481 pkt = data;
2482 type = pkt->type;
2483
2484 data++;
2485 count--;
2486 } else
2487 type = bt_cb(skb)->pkt_type;
2488
1e429f38 2489 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2490 STREAM_REASSEMBLY);
99811510
SS		 2491 if (rem < 0)
2492 return rem;
2493
2494 data += (count - rem);
2495 count = rem;
f81c6224 2496 }
99811510
SS		 2497
2498 return rem;
2499}
2500EXPORT_SYMBOL(hci_recv_stream_fragment);
2501
1da177e4
LT		 2502/* ---- Interface to upper protocols ---- */
2503
1da177e4
LT		 2504int hci_register_cb(struct hci_cb *cb)
2505{
2506 BT_DBG("%p name %s", cb, cb->name);
2507
f20d09d5 2508 write_lock(&hci_cb_list_lock);
1da177e4 2509 list_add(&cb->list, &hci_cb_list);
f20d09d5 2510 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2511
2512 return 0;
2513}
2514EXPORT_SYMBOL(hci_register_cb);
2515
2516int hci_unregister_cb(struct hci_cb *cb)
2517{
2518 BT_DBG("%p name %s", cb, cb->name);
2519
f20d09d5 2520 write_lock(&hci_cb_list_lock);
1da177e4 2521 list_del(&cb->list);
f20d09d5 2522 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2523
2524 return 0;
2525}
2526EXPORT_SYMBOL(hci_unregister_cb);
2527
2528static int hci_send_frame(struct sk_buff *skb)
2529{
2530 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2531
2532 if (!hdev) {
2533 kfree_skb(skb);
2534 return -ENODEV;
2535 }
2536
0d48d939 2537 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2538
cd82e61c
MH		 2539 /* Time stamp */
2540 __net_timestamp(skb);
1da177e4 2541
cd82e61c
MH		 2542 /* Send copy to monitor */
2543 hci_send_to_monitor(hdev, skb);
2544
2545 if (atomic_read(&hdev->promisc)) {
2546 /* Send copy to the sockets */
470fe1b5 2547 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2548 }
2549
2550 /* Get rid of skb owner, prior to sending to the driver. */
2551 skb_orphan(skb);
2552
2553 return hdev->send(skb);
2554}
2555
3119ae95
JH		 2556void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2557{
2558 skb_queue_head_init(&req->cmd_q);
2559 req->hdev = hdev;
5d73e034 2560 req->err = 0;
3119ae95
JH		 2561}
2562
2563int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2564{
2565 struct hci_dev *hdev = req->hdev;
2566 struct sk_buff *skb;
2567 unsigned long flags;
2568
2569 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2570
5d73e034
AG		 2571 /* If an error occured during request building, remove all HCI
2572 * commands queued on the HCI request queue.
2573 */
2574 if (req->err) {
2575 skb_queue_purge(&req->cmd_q);
2576 return req->err;
2577 }
2578
3119ae95
JH		 2579 /* Do not allow empty requests */
2580 if (skb_queue_empty(&req->cmd_q))
382b0c39 2581 return -ENODATA;
3119ae95
JH		 2582
2583 skb = skb_peek_tail(&req->cmd_q);
2584 bt_cb(skb)->req.complete = complete;
2585
2586 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2587 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2588 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2589
2590 queue_work(hdev->workqueue, &hdev->cmd_work);
2591
2592 return 0;
2593}
2594
1ca3a9d0 2595static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2596 u32 plen, const void *param)
1da177e4
LT		 2597{
2598 int len = HCI_COMMAND_HDR_SIZE + plen;
2599 struct hci_command_hdr *hdr;
2600 struct sk_buff *skb;
2601
1da177e4 2602 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2603 if (!skb)
2604 return NULL;
1da177e4
LT		 2605
2606 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2607 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2608 hdr->plen = plen;
2609
2610 if (plen)
2611 memcpy(skb_put(skb, plen), param, plen);
2612
2613 BT_DBG("skb len %d", skb->len);
2614
0d48d939 2615 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2616 skb->dev = (void *) hdev;
c78ae283 2617
1ca3a9d0
JH		 2618 return skb;
2619}
2620
2621/* Send HCI command */
07dc93dd
JH		 2622int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2623 const void *param)
1ca3a9d0
JH		 2624{
2625 struct sk_buff *skb;
2626
2627 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2628
2629 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2630 if (!skb) {
2631 BT_ERR("%s no memory for command", hdev->name);
2632 return -ENOMEM;
2633 }
2634
11714b3d
JH		 2635 /* Stand-alone HCI commands must be flaged as
2636 * single-command requests.
2637 */
2638 bt_cb(skb)->req.start = true;
2639
1da177e4 2640 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2641 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2642
2643 return 0;
2644}
1da177e4 2645
71c76a17 2646/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 2647void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2648 const void *param, u8 event)
71c76a17
JH		 2649{
2650 struct hci_dev *hdev = req->hdev;
2651 struct sk_buff *skb;
2652
2653 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2654
34739c1e
AG		 2655 /* If an error occured during request building, there is no point in
2656 * queueing the HCI command. We can simply return.
2657 */
2658 if (req->err)
2659 return;
2660
71c76a17
JH		 2661 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2662 if (!skb) {
5d73e034
AG		 2663 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2664 hdev->name, opcode);
2665 req->err = -ENOMEM;
e348fe6b 2666 return;
71c76a17
JH		 2667 }
2668
2669 if (skb_queue_empty(&req->cmd_q))
2670 bt_cb(skb)->req.start = true;
2671
02350a72
JH		 2672 bt_cb(skb)->req.event = event;
2673
71c76a17 2674 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 2675}
2676
07dc93dd
JH		 2677void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2678 const void *param)
02350a72
JH		 2679{
2680 hci_req_add_ev(req, opcode, plen, param, 0);
2681}
2682
1da177e4 2683/* Get data from the previously sent command */
a9de9248 2684void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2685{
2686 struct hci_command_hdr *hdr;
2687
2688 if (!hdev->sent_cmd)
2689 return NULL;
2690
2691 hdr = (void *) hdev->sent_cmd->data;
2692
a9de9248 2693 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2694 return NULL;
2695
f0e09510 2696 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2697
2698 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2699}
2700
2701/* Send ACL data */
2702static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2703{
2704 struct hci_acl_hdr *hdr;
2705 int len = skb->len;
2706
badff6d0
ACM		 2707 skb_push(skb, HCI_ACL_HDR_SIZE);
2708 skb_reset_transport_header(skb);
9c70220b 2709 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2710 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2711 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2712}
2713
ee22be7e 2714static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2715 struct sk_buff *skb, __u16 flags)
1da177e4 2716{
ee22be7e 2717 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2718 struct hci_dev *hdev = conn->hdev;
2719 struct sk_buff *list;
2720
087bfd99
GP		 2721 skb->len = skb_headlen(skb);
2722 skb->data_len = 0;
2723
2724 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2725
2726 switch (hdev->dev_type) {
2727 case HCI_BREDR:
2728 hci_add_acl_hdr(skb, conn->handle, flags);
2729 break;
2730 case HCI_AMP:
2731 hci_add_acl_hdr(skb, chan->handle, flags);
2732 break;
2733 default:
2734 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2735 return;
2736 }
087bfd99 2737
70f23020
AE		 2738 list = skb_shinfo(skb)->frag_list;
2739 if (!list) {
1da177e4
LT		 2740 /* Non fragmented */
2741 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2742
73d80deb 2743 skb_queue_tail(queue, skb);
1da177e4
LT		 2744 } else {
2745 /* Fragmented */
2746 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2747
2748 skb_shinfo(skb)->frag_list = NULL;
2749
2750 /* Queue all fragments atomically */
af3e6359 2751 spin_lock(&queue->lock);
1da177e4 2752
73d80deb 2753 __skb_queue_tail(queue, skb);
e702112f
AE		 2754
2755 flags &= ~ACL_START;
2756 flags |= ACL_CONT;
1da177e4
LT		 2757 do {
2758 skb = list; list = list->next;
8e87d142 2759
1da177e4 2760 skb->dev = (void *) hdev;
0d48d939 2761 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2762 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2763
2764 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2765
73d80deb 2766 __skb_queue_tail(queue, skb);
1da177e4
LT		 2767 } while (list);
2768
af3e6359 2769 spin_unlock(&queue->lock);
1da177e4 2770 }
73d80deb
LAD		 2771}
2772
2773void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2774{
ee22be7e 2775 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2776
f0e09510 2777 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2778
2779 skb->dev = (void *) hdev;
73d80deb 2780
ee22be7e 2781 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2782
3eff45ea 2783 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2784}
1da177e4
LT		 2785
2786/* Send SCO data */
0d861d8b 2787void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2788{
2789 struct hci_dev *hdev = conn->hdev;
2790 struct hci_sco_hdr hdr;
2791
2792 BT_DBG("%s len %d", hdev->name, skb->len);
2793
aca3192c 2794 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2795 hdr.dlen = skb->len;
2796
badff6d0
ACM		 2797 skb_push(skb, HCI_SCO_HDR_SIZE);
2798 skb_reset_transport_header(skb);
9c70220b 2799 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2800
2801 skb->dev = (void *) hdev;
0d48d939 2802 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2803
1da177e4 2804 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2805 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2806}
1da177e4
LT		 2807
2808/* ---- HCI TX task (outgoing data) ---- */
2809
2810/* HCI Connection scheduler */
6039aa73
GP		 2811static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2812 int *quote)
1da177e4
LT		 2813{
2814 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2815 struct hci_conn *conn = NULL, *c;
abc5de8f 2816 unsigned int num = 0, min = ~0;
1da177e4 2817
8e87d142 2818 /* We don't have to lock device here. Connections are always
1da177e4 2819 * added and removed with TX task disabled. */
bf4c6325
GP		 2820
2821 rcu_read_lock();
2822
2823 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2824 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2825 continue;
769be974
MH		 2826
2827 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2828 continue;
2829
1da177e4
LT		 2830 num++;
2831
2832 if (c->sent < min) {
2833 min = c->sent;
2834 conn = c;
2835 }
52087a79
LAD		 2836
2837 if (hci_conn_num(hdev, type) == num)
2838 break;
1da177e4
LT		 2839 }
2840
bf4c6325
GP		 2841 rcu_read_unlock();
2842
1da177e4 2843 if (conn) {
6ed58ec5
VT		 2844 int cnt, q;
2845
2846 switch (conn->type) {
2847 case ACL_LINK:
2848 cnt = hdev->acl_cnt;
2849 break;
2850 case SCO_LINK:
2851 case ESCO_LINK:
2852 cnt = hdev->sco_cnt;
2853 break;
2854 case LE_LINK:
2855 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2856 break;
2857 default:
2858 cnt = 0;
2859 BT_ERR("Unknown link type");
2860 }
2861
2862 q = cnt / num;
1da177e4
LT		 2863 *quote = q ? q : 1;
2864 } else
2865 *quote = 0;
2866
2867 BT_DBG("conn %p quote %d", conn, *quote);
2868 return conn;
2869}
2870
6039aa73 2871static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2872{
2873 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2874 struct hci_conn *c;
1da177e4 2875
bae1f5d9 2876 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2877
bf4c6325
GP		 2878 rcu_read_lock();
2879
1da177e4 2880 /* Kill stalled connections */
bf4c6325 2881 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2882 if (c->type == type && c->sent) {
6ed93dc6
AE		 2883 BT_ERR("%s killing stalled connection %pMR",
2884 hdev->name, &c->dst);
bed71748 2885 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2886 }
2887 }
bf4c6325
GP		 2888
2889 rcu_read_unlock();
1da177e4
LT		 2890}
2891
6039aa73
GP		 2892static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2893 int *quote)
1da177e4 2894{
73d80deb
LAD		 2895 struct hci_conn_hash *h = &hdev->conn_hash;
2896 struct hci_chan *chan = NULL;
abc5de8f 2897 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2898 struct hci_conn *conn;
73d80deb
LAD		 2899 int cnt, q, conn_num = 0;
2900
2901 BT_DBG("%s", hdev->name);
2902
bf4c6325
GP		 2903 rcu_read_lock();
2904
2905 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2906 struct hci_chan *tmp;
2907
2908 if (conn->type != type)
2909 continue;
2910
2911 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2912 continue;
2913
2914 conn_num++;
2915
8192edef 2916 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2917 struct sk_buff *skb;
2918
2919 if (skb_queue_empty(&tmp->data_q))
2920 continue;
2921
2922 skb = skb_peek(&tmp->data_q);
2923 if (skb->priority < cur_prio)
2924 continue;
2925
2926 if (skb->priority > cur_prio) {
2927 num = 0;
2928 min = ~0;
2929 cur_prio = skb->priority;
2930 }
2931
2932 num++;
2933
2934 if (conn->sent < min) {
2935 min = conn->sent;
2936 chan = tmp;
2937 }
2938 }
2939
2940 if (hci_conn_num(hdev, type) == conn_num)
2941 break;
2942 }
2943
bf4c6325
GP		 2944 rcu_read_unlock();
2945
73d80deb
LAD		 2946 if (!chan)
2947 return NULL;
2948
2949 switch (chan->conn->type) {
2950 case ACL_LINK:
2951 cnt = hdev->acl_cnt;
2952 break;
bd1eb66b
AE		 2953 case AMP_LINK:
2954 cnt = hdev->block_cnt;
2955 break;
73d80deb
LAD		 2956 case SCO_LINK:
2957 case ESCO_LINK:
2958 cnt = hdev->sco_cnt;
2959 break;
2960 case LE_LINK:
2961 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2962 break;
2963 default:
2964 cnt = 0;
2965 BT_ERR("Unknown link type");
2966 }
2967
2968 q = cnt / num;
2969 *quote = q ? q : 1;
2970 BT_DBG("chan %p quote %d", chan, *quote);
2971 return chan;
2972}
2973
02b20f0b
LAD		 2974static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2975{
2976 struct hci_conn_hash *h = &hdev->conn_hash;
2977 struct hci_conn *conn;
2978 int num = 0;
2979
2980 BT_DBG("%s", hdev->name);
2981
bf4c6325
GP		 2982 rcu_read_lock();
2983
2984 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2985 struct hci_chan *chan;
2986
2987 if (conn->type != type)
2988 continue;
2989
2990 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2991 continue;
2992
2993 num++;
2994
8192edef 2995 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2996 struct sk_buff *skb;
2997
2998 if (chan->sent) {
2999 chan->sent = 0;
3000 continue;
3001 }
3002
3003 if (skb_queue_empty(&chan->data_q))
3004 continue;
3005
3006 skb = skb_peek(&chan->data_q);
3007 if (skb->priority >= HCI_PRIO_MAX - 1)
3008 continue;
3009
3010 skb->priority = HCI_PRIO_MAX - 1;
3011
3012 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3013 skb->priority);
02b20f0b
LAD		 3014 }
3015
3016 if (hci_conn_num(hdev, type) == num)
3017 break;
3018 }
bf4c6325
GP		 3019
3020 rcu_read_unlock();
3021
02b20f0b
LAD		 3022}
3023
b71d385a
AE		 3024static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3025{
3026 /* Calculate count of blocks used by this packet */
3027 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3028}
3029
6039aa73 3030static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3031{
1da177e4
LT		 3032 if (!test_bit(HCI_RAW, &hdev->flags)) {
3033 /* ACL tx timeout must be longer than maximum
3034 * link supervision timeout (40.9 seconds) */
63d2bc1b 3035 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3036 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3037 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3038 }
63d2bc1b 3039}
1da177e4 3040
6039aa73 3041static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3042{
3043 unsigned int cnt = hdev->acl_cnt;
3044 struct hci_chan *chan;
3045 struct sk_buff *skb;
3046 int quote;
3047
3048 __check_timeout(hdev, cnt);
04837f64 3049
73d80deb 3050 while (hdev->acl_cnt &&
a8c5fb1a 3051 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3052 u32 priority = (skb_peek(&chan->data_q))->priority;
3053 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3054 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3055 skb->len, skb->priority);
73d80deb 3056
ec1cce24
LAD		 3057 /* Stop if priority has changed */
3058 if (skb->priority < priority)
3059 break;
3060
3061 skb = skb_dequeue(&chan->data_q);
3062
73d80deb 3063 hci_conn_enter_active_mode(chan->conn,
04124681 3064 bt_cb(skb)->force_active);
04837f64 3065
1da177e4
LT		 3066 hci_send_frame(skb);
3067 hdev->acl_last_tx = jiffies;
3068
3069 hdev->acl_cnt--;
73d80deb
LAD		 3070 chan->sent++;
3071 chan->conn->sent++;
1da177e4
LT		 3072 }
3073 }
02b20f0b
LAD		 3074
3075 if (cnt != hdev->acl_cnt)
3076 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3077}
3078
6039aa73 3079static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3080{
63d2bc1b 3081 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3082 struct hci_chan *chan;
3083 struct sk_buff *skb;
3084 int quote;
bd1eb66b 3085 u8 type;
b71d385a 3086
63d2bc1b 3087 __check_timeout(hdev, cnt);
b71d385a 3088
bd1eb66b
AE		 3089 BT_DBG("%s", hdev->name);
3090
3091 if (hdev->dev_type == HCI_AMP)
3092 type = AMP_LINK;
3093 else
3094 type = ACL_LINK;
3095
b71d385a 3096 while (hdev->block_cnt > 0 &&
bd1eb66b 3097 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3098 u32 priority = (skb_peek(&chan->data_q))->priority;
3099 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3100 int blocks;
3101
3102 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3103 skb->len, skb->priority);
b71d385a
AE		 3104
3105 /* Stop if priority has changed */
3106 if (skb->priority < priority)
3107 break;
3108
3109 skb = skb_dequeue(&chan->data_q);
3110
3111 blocks = __get_blocks(hdev, skb);
3112 if (blocks > hdev->block_cnt)
3113 return;
3114
3115 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3116 bt_cb(skb)->force_active);
b71d385a
AE		 3117
3118 hci_send_frame(skb);
3119 hdev->acl_last_tx = jiffies;
3120
3121 hdev->block_cnt -= blocks;
3122 quote -= blocks;
3123
3124 chan->sent += blocks;
3125 chan->conn->sent += blocks;
3126 }
3127 }
3128
3129 if (cnt != hdev->block_cnt)
bd1eb66b 3130 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3131}
3132
6039aa73 3133static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3134{
3135 BT_DBG("%s", hdev->name);
3136
bd1eb66b
AE		 3137 /* No ACL link over BR/EDR controller */
3138 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3139 return;
3140
3141 /* No AMP link over AMP controller */
3142 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3143 return;
3144
3145 switch (hdev->flow_ctl_mode) {
3146 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3147 hci_sched_acl_pkt(hdev);
3148 break;
3149
3150 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3151 hci_sched_acl_blk(hdev);
3152 break;
3153 }
3154}
3155
1da177e4 3156/* Schedule SCO */
6039aa73 3157static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3158{
3159 struct hci_conn *conn;
3160 struct sk_buff *skb;
3161 int quote;
3162
3163 BT_DBG("%s", hdev->name);
3164
52087a79
LAD		 3165 if (!hci_conn_num(hdev, SCO_LINK))
3166 return;
3167
1da177e4
LT		 3168 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3169 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3170 BT_DBG("skb %p len %d", skb, skb->len);
3171 hci_send_frame(skb);
3172
3173 conn->sent++;
3174 if (conn->sent == ~0)
3175 conn->sent = 0;
3176 }
3177 }
3178}
3179
6039aa73 3180static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3181{
3182 struct hci_conn *conn;
3183 struct sk_buff *skb;
3184 int quote;
3185
3186 BT_DBG("%s", hdev->name);
3187
52087a79
LAD		 3188 if (!hci_conn_num(hdev, ESCO_LINK))
3189 return;
3190
8fc9ced3
GP		 3191 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3192 &quote))) {
b6a0dc82
MH		 3193 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3194 BT_DBG("skb %p len %d", skb, skb->len);
3195 hci_send_frame(skb);
3196
3197 conn->sent++;
3198 if (conn->sent == ~0)
3199 conn->sent = 0;
3200 }
3201 }
3202}
3203
6039aa73 3204static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3205{
73d80deb 3206 struct hci_chan *chan;
6ed58ec5 3207 struct sk_buff *skb;
02b20f0b 3208 int quote, cnt, tmp;
6ed58ec5
VT		 3209
3210 BT_DBG("%s", hdev->name);
3211
52087a79
LAD		 3212 if (!hci_conn_num(hdev, LE_LINK))
3213 return;
3214
6ed58ec5
VT		 3215 if (!test_bit(HCI_RAW, &hdev->flags)) {
3216 /* LE tx timeout must be longer than maximum
3217 * link supervision timeout (40.9 seconds) */
bae1f5d9 3218 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3219 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3220 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3221 }
3222
3223 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3224 tmp = cnt;
73d80deb 3225 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3226 u32 priority = (skb_peek(&chan->data_q))->priority;
3227 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3228 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3229 skb->len, skb->priority);
6ed58ec5 3230
ec1cce24
LAD		 3231 /* Stop if priority has changed */
3232 if (skb->priority < priority)
3233 break;
3234
3235 skb = skb_dequeue(&chan->data_q);
3236
6ed58ec5
VT		 3237 hci_send_frame(skb);
3238 hdev->le_last_tx = jiffies;
3239
3240 cnt--;
73d80deb
LAD		 3241 chan->sent++;
3242 chan->conn->sent++;
6ed58ec5
VT		 3243 }
3244 }
73d80deb 3245
6ed58ec5
VT		 3246 if (hdev->le_pkts)
3247 hdev->le_cnt = cnt;
3248 else
3249 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3250
3251 if (cnt != tmp)
3252 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3253}
3254
3eff45ea 3255static void hci_tx_work(struct work_struct *work)
1da177e4 3256{
3eff45ea 3257 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3258 struct sk_buff *skb;
3259
6ed58ec5 3260 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3261 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 3262
3263 /* Schedule queues and send stuff to HCI driver */
3264
3265 hci_sched_acl(hdev);
3266
3267 hci_sched_sco(hdev);
3268
b6a0dc82
MH		 3269 hci_sched_esco(hdev);
3270
6ed58ec5
VT		 3271 hci_sched_le(hdev);
3272
1da177e4
LT		 3273 /* Send next queued raw (unknown type) packet */
3274 while ((skb = skb_dequeue(&hdev->raw_q)))
3275 hci_send_frame(skb);
1da177e4
LT		 3276}
3277
25985edc 3278/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3279
3280/* ACL data packet */
6039aa73 3281static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3282{
3283 struct hci_acl_hdr *hdr = (void *) skb->data;
3284 struct hci_conn *conn;
3285 __u16 handle, flags;
3286
3287 skb_pull(skb, HCI_ACL_HDR_SIZE);
3288
3289 handle = __le16_to_cpu(hdr->handle);
3290 flags = hci_flags(handle);
3291 handle = hci_handle(handle);
3292
f0e09510 3293 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3294 handle, flags);
1da177e4
LT		 3295
3296 hdev->stat.acl_rx++;
3297
3298 hci_dev_lock(hdev);
3299 conn = hci_conn_hash_lookup_handle(hdev, handle);
3300 hci_dev_unlock(hdev);
8e87d142 3301
1da177e4 3302 if (conn) {
65983fc7 3303 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3304
1da177e4 3305 /* Send to upper protocol */
686ebf28
UF		 3306 l2cap_recv_acldata(conn, skb, flags);
3307 return;
1da177e4 3308 } else {
8e87d142 3309 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3310 hdev->name, handle);
1da177e4
LT		 3311 }
3312
3313 kfree_skb(skb);
3314}
3315
3316/* SCO data packet */
6039aa73 3317static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3318{
3319 struct hci_sco_hdr *hdr = (void *) skb->data;
3320 struct hci_conn *conn;
3321 __u16 handle;
3322
3323 skb_pull(skb, HCI_SCO_HDR_SIZE);
3324
3325 handle = __le16_to_cpu(hdr->handle);
3326
f0e09510 3327 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3328
3329 hdev->stat.sco_rx++;
3330
3331 hci_dev_lock(hdev);
3332 conn = hci_conn_hash_lookup_handle(hdev, handle);
3333 hci_dev_unlock(hdev);
3334
3335 if (conn) {
1da177e4 3336 /* Send to upper protocol */
686ebf28
UF		 3337 sco_recv_scodata(conn, skb);
3338 return;
1da177e4 3339 } else {
8e87d142 3340 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3341 hdev->name, handle);
1da177e4
LT		 3342 }
3343
3344 kfree_skb(skb);
3345}
3346
9238f36a
JH		 3347static bool hci_req_is_complete(struct hci_dev *hdev)
3348{
3349 struct sk_buff *skb;
3350
3351 skb = skb_peek(&hdev->cmd_q);
3352 if (!skb)
3353 return true;
3354
3355 return bt_cb(skb)->req.start;
3356}
3357
42c6b129
JH		 3358static void hci_resend_last(struct hci_dev *hdev)
3359{
3360 struct hci_command_hdr *sent;
3361 struct sk_buff *skb;
3362 u16 opcode;
3363
3364 if (!hdev->sent_cmd)
3365 return;
3366
3367 sent = (void *) hdev->sent_cmd->data;
3368 opcode = __le16_to_cpu(sent->opcode);
3369 if (opcode == HCI_OP_RESET)
3370 return;
3371
3372 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3373 if (!skb)
3374 return;
3375
3376 skb_queue_head(&hdev->cmd_q, skb);
3377 queue_work(hdev->workqueue, &hdev->cmd_work);
3378}
3379
9238f36a
JH		 3380void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3381{
3382 hci_req_complete_t req_complete = NULL;
3383 struct sk_buff *skb;
3384 unsigned long flags;
3385
3386 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3387
42c6b129
JH		 3388 /* If the completed command doesn't match the last one that was
3389 * sent we need to do special handling of it.
9238f36a 3390 */
42c6b129
JH		 3391 if (!hci_sent_cmd_data(hdev, opcode)) {
3392 /* Some CSR based controllers generate a spontaneous
3393 * reset complete event during init and any pending
3394 * command will never be completed. In such a case we
3395 * need to resend whatever was the last sent
3396 * command.
3397 */
3398 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3399 hci_resend_last(hdev);
3400
9238f36a 3401 return;
42c6b129 3402 }
9238f36a
JH		 3403
3404 /* If the command succeeded and there's still more commands in
3405 * this request the request is not yet complete.
3406 */
3407 if (!status && !hci_req_is_complete(hdev))
3408 return;
3409
3410 /* If this was the last command in a request the complete
3411 * callback would be found in hdev->sent_cmd instead of the
3412 * command queue (hdev->cmd_q).
3413 */
3414 if (hdev->sent_cmd) {
3415 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 3416
3417 if (req_complete) {
3418 /* We must set the complete callback to NULL to
3419 * avoid calling the callback more than once if
3420 * this function gets called again.
3421 */
3422 bt_cb(hdev->sent_cmd)->req.complete = NULL;
3423
9238f36a 3424 goto call_complete;
53e21fbc 3425 }
9238f36a
JH		 3426 }
3427
3428 /* Remove all pending commands belonging to this request */
3429 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3430 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3431 if (bt_cb(skb)->req.start) {
3432 __skb_queue_head(&hdev->cmd_q, skb);
3433 break;
3434 }
3435
3436 req_complete = bt_cb(skb)->req.complete;
3437 kfree_skb(skb);
3438 }
3439 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3440
3441call_complete:
3442 if (req_complete)
3443 req_complete(hdev, status);
3444}
3445
b78752cc 3446static void hci_rx_work(struct work_struct *work)
1da177e4 3447{
b78752cc 3448 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3449 struct sk_buff *skb;
3450
3451 BT_DBG("%s", hdev->name);
3452
1da177e4 3453 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3454 /* Send copy to monitor */
3455 hci_send_to_monitor(hdev, skb);
3456
1da177e4
LT		 3457 if (atomic_read(&hdev->promisc)) {
3458 /* Send copy to the sockets */
470fe1b5 3459 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3460 }
3461
3462 if (test_bit(HCI_RAW, &hdev->flags)) {
3463 kfree_skb(skb);
3464 continue;
3465 }
3466
3467 if (test_bit(HCI_INIT, &hdev->flags)) {
3468 /* Don't process data packets in this states. */
0d48d939 3469 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3470 case HCI_ACLDATA_PKT:
3471 case HCI_SCODATA_PKT:
3472 kfree_skb(skb);
3473 continue;
3ff50b79 3474 }
1da177e4
LT		 3475 }
3476
3477 /* Process frame */
0d48d939 3478 switch (bt_cb(skb)->pkt_type) {
1da177e4 3479 case HCI_EVENT_PKT:
b78752cc 3480 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3481 hci_event_packet(hdev, skb);
3482 break;
3483
3484 case HCI_ACLDATA_PKT:
3485 BT_DBG("%s ACL data packet", hdev->name);
3486 hci_acldata_packet(hdev, skb);
3487 break;
3488
3489 case HCI_SCODATA_PKT:
3490 BT_DBG("%s SCO data packet", hdev->name);
3491 hci_scodata_packet(hdev, skb);
3492 break;
3493
3494 default:
3495 kfree_skb(skb);
3496 break;
3497 }
3498 }
1da177e4
LT		 3499}
3500
c347b765 3501static void hci_cmd_work(struct work_struct *work)
1da177e4 3502{
c347b765 3503 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3504 struct sk_buff *skb;
3505
2104786b
AE		 3506 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3507 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3508
1da177e4 3509 /* Send queued commands */
5a08ecce
AE		 3510 if (atomic_read(&hdev->cmd_cnt)) {
3511 skb = skb_dequeue(&hdev->cmd_q);
3512 if (!skb)
3513 return;
3514
7585b97a 3515 kfree_skb(hdev->sent_cmd);
1da177e4 3516
70f23020
AE		 3517 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3518 if (hdev->sent_cmd) {
1da177e4
LT		 3519 atomic_dec(&hdev->cmd_cnt);
3520 hci_send_frame(skb);
7bdb8a5c
SJ		 3521 if (test_bit(HCI_RESET, &hdev->flags))
3522 del_timer(&hdev->cmd_timer);
3523 else
3524 mod_timer(&hdev->cmd_timer,
5f246e89 3525 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3526 } else {
3527 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3528 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3529 }
3530 }
3531}
2519a1fc 3532
31f7956c
AG		 3533u8 bdaddr_to_le(u8 bdaddr_type)
3534{
3535 switch (bdaddr_type) {
3536 case BDADDR_LE_PUBLIC:
3537 return ADDR_LE_DEV_PUBLIC;
3538
3539 default:
3540 /* Fallback to LE Random address type */
3541 return ADDR_LE_DEV_RANDOM;
3542 }
3543}
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