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Bluetooth: Set HCI_QUIRK_STRICT_DUPLICATE_FILTER for BTUSB_INTEL
[deliverable/linux.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
8c520a59 30#include <linux/rfkill.h>
baf27f6e 31#include <linux/debugfs.h>
99780a7b 32#include <linux/crypto.h>
47219839 33#include <asm/unaligned.h>
1da177e4
LT		 34
35#include <net/bluetooth/bluetooth.h>
36#include <net/bluetooth/hci_core.h>
4bc58f51 37#include <net/bluetooth/l2cap.h>
af58925c 38#include <net/bluetooth/mgmt.h>
1da177e4 39
0857dd3b 40#include "hci_request.h"
60c5f5fb 41#include "hci_debugfs.h"
970c4e46
JH		 42#include "smp.h"
43
b78752cc 44static void hci_rx_work(struct work_struct *work);
c347b765 45static void hci_cmd_work(struct work_struct *work);
3eff45ea 46static void hci_tx_work(struct work_struct *work);
1da177e4 47
1da177e4
LT		 48/* HCI device list */
49LIST_HEAD(hci_dev_list);
50DEFINE_RWLOCK(hci_dev_list_lock);
51
52/* HCI callback list */
53LIST_HEAD(hci_cb_list);
54DEFINE_RWLOCK(hci_cb_list_lock);
55
3df92b31
SL		 56/* HCI ID Numbering */
57static DEFINE_IDA(hci_index_ida);
58
899de765
MH		 59/* ----- HCI requests ----- */
60
61#define HCI_REQ_DONE 0
62#define HCI_REQ_PEND 1
63#define HCI_REQ_CANCELED 2
64
65#define hci_req_lock(d) mutex_lock(&d->req_lock)
66#define hci_req_unlock(d) mutex_unlock(&d->req_lock)
67
1da177e4
LT		 68/* ---- HCI notifications ---- */
69
6516455d 70static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 71{
040030ef 72 hci_sock_dev_event(hdev, event);
1da177e4
LT		 73}
74
baf27f6e
MH		 75/* ---- HCI debugfs entries ---- */
76
4b4148e9
MH		 77static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
78 size_t count, loff_t *ppos)
79{
80 struct hci_dev *hdev = file->private_data;
81 char buf[3];
82
111902f7 83 buf[0] = test_bit(HCI_DUT_MODE, &hdev->dbg_flags) ? 'Y': 'N';
4b4148e9
MH		 84 buf[1] = '\n';
85 buf[2] = '\0';
86 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
87}
88
89static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
90 size_t count, loff_t *ppos)
91{
92 struct hci_dev *hdev = file->private_data;
93 struct sk_buff *skb;
94 char buf[32];
95 size_t buf_size = min(count, (sizeof(buf)-1));
96 bool enable;
97 int err;
98
99 if (!test_bit(HCI_UP, &hdev->flags))
100 return -ENETDOWN;
101
102 if (copy_from_user(buf, user_buf, buf_size))
103 return -EFAULT;
104
105 buf[buf_size] = '\0';
106 if (strtobool(buf, &enable))
107 return -EINVAL;
108
111902f7 109 if (enable == test_bit(HCI_DUT_MODE, &hdev->dbg_flags))
4b4148e9
MH		 110 return -EALREADY;
111
112 hci_req_lock(hdev);
113 if (enable)
114 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
115 HCI_CMD_TIMEOUT);
116 else
117 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
118 HCI_CMD_TIMEOUT);
119 hci_req_unlock(hdev);
120
121 if (IS_ERR(skb))
122 return PTR_ERR(skb);
123
124 err = -bt_to_errno(skb->data[0]);
125 kfree_skb(skb);
126
127 if (err < 0)
128 return err;
129
111902f7 130 change_bit(HCI_DUT_MODE, &hdev->dbg_flags);
4b4148e9
MH		 131
132 return count;
133}
134
135static const struct file_operations dut_mode_fops = {
136 .open = simple_open,
137 .read = dut_mode_read,
138 .write = dut_mode_write,
139 .llseek = default_llseek,
140};
141
1da177e4
LT		 142/* ---- HCI requests ---- */
143
1904a853 144static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode)
1da177e4 145{
42c6b129 146 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT		 147
148 if (hdev->req_status == HCI_REQ_PEND) {
149 hdev->req_result = result;
150 hdev->req_status = HCI_REQ_DONE;
151 wake_up_interruptible(&hdev->req_wait_q);
152 }
153}
154
155static void hci_req_cancel(struct hci_dev *hdev, int err)
156{
157 BT_DBG("%s err 0x%2.2x", hdev->name, err);
158
159 if (hdev->req_status == HCI_REQ_PEND) {
160 hdev->req_result = err;
161 hdev->req_status = HCI_REQ_CANCELED;
162 wake_up_interruptible(&hdev->req_wait_q);
163 }
164}
165
77a63e0a
FW		 166static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
167 u8 event)
75e84b7c
JH		 168{
169 struct hci_ev_cmd_complete *ev;
170 struct hci_event_hdr *hdr;
171 struct sk_buff *skb;
172
173 hci_dev_lock(hdev);
174
175 skb = hdev->recv_evt;
176 hdev->recv_evt = NULL;
177
178 hci_dev_unlock(hdev);
179
180 if (!skb)
181 return ERR_PTR(-ENODATA);
182
183 if (skb->len < sizeof(*hdr)) {
184 BT_ERR("Too short HCI event");
185 goto failed;
186 }
187
188 hdr = (void *) skb->data;
189 skb_pull(skb, HCI_EVENT_HDR_SIZE);
190
7b1abbbe
JH		 191 if (event) {
192 if (hdr->evt != event)
193 goto failed;
194 return skb;
195 }
196
75e84b7c
JH		 197 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
198 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
199 goto failed;
200 }
201
202 if (skb->len < sizeof(*ev)) {
203 BT_ERR("Too short cmd_complete event");
204 goto failed;
205 }
206
207 ev = (void *) skb->data;
208 skb_pull(skb, sizeof(*ev));
209
210 if (opcode == __le16_to_cpu(ev->opcode))
211 return skb;
212
213 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
214 __le16_to_cpu(ev->opcode));
215
216failed:
217 kfree_skb(skb);
218 return ERR_PTR(-ENODATA);
219}
220
7b1abbbe 221struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 222 const void *param, u8 event, u32 timeout)
75e84b7c
JH		 223{
224 DECLARE_WAITQUEUE(wait, current);
225 struct hci_request req;
226 int err = 0;
227
228 BT_DBG("%s", hdev->name);
229
230 hci_req_init(&req, hdev);
231
7b1abbbe 232 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH		 233
234 hdev->req_status = HCI_REQ_PEND;
235
75e84b7c
JH		 236 add_wait_queue(&hdev->req_wait_q, &wait);
237 set_current_state(TASK_INTERRUPTIBLE);
238
039fada5
CP		 239 err = hci_req_run(&req, hci_req_sync_complete);
240 if (err < 0) {
241 remove_wait_queue(&hdev->req_wait_q, &wait);
22a3ceab 242 set_current_state(TASK_RUNNING);
039fada5
CP		 243 return ERR_PTR(err);
244 }
245
75e84b7c
JH		 246 schedule_timeout(timeout);
247
248 remove_wait_queue(&hdev->req_wait_q, &wait);
249
250 if (signal_pending(current))
251 return ERR_PTR(-EINTR);
252
253 switch (hdev->req_status) {
254 case HCI_REQ_DONE:
255 err = -bt_to_errno(hdev->req_result);
256 break;
257
258 case HCI_REQ_CANCELED:
259 err = -hdev->req_result;
260 break;
261
262 default:
263 err = -ETIMEDOUT;
264 break;
265 }
266
267 hdev->req_status = hdev->req_result = 0;
268
269 BT_DBG("%s end: err %d", hdev->name, err);
270
271 if (err < 0)
272 return ERR_PTR(err);
273
7b1abbbe
JH		 274 return hci_get_cmd_complete(hdev, opcode, event);
275}
276EXPORT_SYMBOL(__hci_cmd_sync_ev);
277
278struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 279 const void *param, u32 timeout)
7b1abbbe
JH		 280{
281 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH		 282}
283EXPORT_SYMBOL(__hci_cmd_sync);
284
1da177e4 285/* Execute request and wait for completion. */
01178cd4 286static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 287 void (*func)(struct hci_request *req,
288 unsigned long opt),
01178cd4 289 unsigned long opt, __u32 timeout)
1da177e4 290{
42c6b129 291 struct hci_request req;
1da177e4
LT		 292 DECLARE_WAITQUEUE(wait, current);
293 int err = 0;
294
295 BT_DBG("%s start", hdev->name);
296
42c6b129
JH		 297 hci_req_init(&req, hdev);
298
1da177e4
LT		 299 hdev->req_status = HCI_REQ_PEND;
300
42c6b129 301 func(&req, opt);
53cce22d 302
039fada5
CP		 303 add_wait_queue(&hdev->req_wait_q, &wait);
304 set_current_state(TASK_INTERRUPTIBLE);
305
42c6b129
JH		 306 err = hci_req_run(&req, hci_req_sync_complete);
307 if (err < 0) {
53cce22d 308 hdev->req_status = 0;
920c8300 309
039fada5 310 remove_wait_queue(&hdev->req_wait_q, &wait);
22a3ceab 311 set_current_state(TASK_RUNNING);
039fada5 312
920c8300
AG		 313 /* ENODATA means the HCI request command queue is empty.
314 * This can happen when a request with conditionals doesn't
315 * trigger any commands to be sent. This is normal behavior
316 * and should not trigger an error return.
42c6b129 317 */
920c8300
AG		 318 if (err == -ENODATA)
319 return 0;
320
321 return err;
53cce22d
JH		 322 }
323
1da177e4
LT		 324 schedule_timeout(timeout);
325
326 remove_wait_queue(&hdev->req_wait_q, &wait);
327
328 if (signal_pending(current))
329 return -EINTR;
330
331 switch (hdev->req_status) {
332 case HCI_REQ_DONE:
e175072f 333 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 334 break;
335
336 case HCI_REQ_CANCELED:
337 err = -hdev->req_result;
338 break;
339
340 default:
341 err = -ETIMEDOUT;
342 break;
3ff50b79 343 }
1da177e4 344
a5040efa 345 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 346
347 BT_DBG("%s end: err %d", hdev->name, err);
348
349 return err;
350}
351
01178cd4 352static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 353 void (*req)(struct hci_request *req,
354 unsigned long opt),
01178cd4 355 unsigned long opt, __u32 timeout)
1da177e4
LT		 356{
357 int ret;
358
7c6a329e
MH		 359 if (!test_bit(HCI_UP, &hdev->flags))
360 return -ENETDOWN;
361
1da177e4
LT		 362 /* Serialize all requests */
363 hci_req_lock(hdev);
01178cd4 364 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 365 hci_req_unlock(hdev);
366
367 return ret;
368}
369
42c6b129 370static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 371{
42c6b129 372 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 373
374 /* Reset device */
42c6b129
JH		 375 set_bit(HCI_RESET, &req->hdev->flags);
376 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 377}
378
42c6b129 379static void bredr_init(struct hci_request *req)
1da177e4 380{
42c6b129 381 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 382
1da177e4 383 /* Read Local Supported Features */
42c6b129 384 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 385
1143e5a6 386 /* Read Local Version */
42c6b129 387 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 388
389 /* Read BD Address */
42c6b129 390 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 391}
392
42c6b129 393static void amp_init(struct hci_request *req)
e61ef499 394{
42c6b129 395 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 396
e61ef499 397 /* Read Local Version */
42c6b129 398 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489 399
f6996cfe
MH		 400 /* Read Local Supported Commands */
401 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
402
403 /* Read Local Supported Features */
404 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
405
6bcbc489 406 /* Read Local AMP Info */
42c6b129 407 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 408
409 /* Read Data Blk size */
42c6b129 410 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
7528ca1c 411
f38ba941
MH		 412 /* Read Flow Control Mode */
413 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
414
7528ca1c
MH		 415 /* Read Location Data */
416 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
e61ef499
AE		 417}
418
42c6b129 419static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 420{
42c6b129 421 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 422
423 BT_DBG("%s %ld", hdev->name, opt);
424
11778716
AE		 425 /* Reset */
426 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 427 hci_reset_req(req, 0);
11778716 428
e61ef499
AE		 429 switch (hdev->dev_type) {
430 case HCI_BREDR:
42c6b129 431 bredr_init(req);
e61ef499
AE		 432 break;
433
434 case HCI_AMP:
42c6b129 435 amp_init(req);
e61ef499
AE		 436 break;
437
438 default:
439 BT_ERR("Unknown device type %d", hdev->dev_type);
440 break;
441 }
e61ef499
AE		 442}
443
42c6b129 444static void bredr_setup(struct hci_request *req)
2177bab5 445{
2177bab5
JH		 446 __le16 param;
447 __u8 flt_type;
448
449 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 450 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 451
452 /* Read Class of Device */
42c6b129 453 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 454
455 /* Read Local Name */
42c6b129 456 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 457
458 /* Read Voice Setting */
42c6b129 459 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5 460
b4cb9fb2
MH		 461 /* Read Number of Supported IAC */
462 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
463
4b836f39
MH		 464 /* Read Current IAC LAP */
465 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
466
2177bab5
JH		 467 /* Clear Event Filters */
468 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 469 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 470
471 /* Connection accept timeout ~20 secs */
dcf4adbf 472 param = cpu_to_le16(0x7d00);
42c6b129 473 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5
JH		 474}
475
42c6b129 476static void le_setup(struct hci_request *req)
2177bab5 477{
c73eee91
JH		 478 struct hci_dev *hdev = req->hdev;
479
2177bab5 480 /* Read LE Buffer Size */
42c6b129 481 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 482
483 /* Read LE Local Supported Features */
42c6b129 484 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5 485
747d3f03
MH		 486 /* Read LE Supported States */
487 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
488
2177bab5 489 /* Read LE White List Size */
42c6b129 490 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5 491
747d3f03
MH		 492 /* Clear LE White List */
493 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
c73eee91
JH		 494
495 /* LE-only controllers have LE implicitly enabled */
496 if (!lmp_bredr_capable(hdev))
497 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 498}
499
42c6b129 500static void hci_setup_event_mask(struct hci_request *req)
2177bab5 501{
42c6b129
JH		 502 struct hci_dev *hdev = req->hdev;
503
2177bab5
JH		 504 /* The second byte is 0xff instead of 0x9f (two reserved bits
505 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
506 * command otherwise.
507 */
508 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
509
510 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
511 * any event mask for pre 1.2 devices.
512 */
513 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
514 return;
515
516 if (lmp_bredr_capable(hdev)) {
517 events[4] |= 0x01; /* Flow Specification Complete */
518 events[4] |= 0x02; /* Inquiry Result with RSSI */
519 events[4] |= 0x04; /* Read Remote Extended Features Complete */
520 events[5] |= 0x08; /* Synchronous Connection Complete */
521 events[5] |= 0x10; /* Synchronous Connection Changed */
c7882cbd
MH		 522 } else {
523 /* Use a different default for LE-only devices */
524 memset(events, 0, sizeof(events));
525 events[0] |= 0x10; /* Disconnection Complete */
c7882cbd
MH		 526 events[1] |= 0x08; /* Read Remote Version Information Complete */
527 events[1] |= 0x20; /* Command Complete */
528 events[1] |= 0x40; /* Command Status */
529 events[1] |= 0x80; /* Hardware Error */
530 events[2] |= 0x04; /* Number of Completed Packets */
531 events[3] |= 0x02; /* Data Buffer Overflow */
0da71f1b
MH		 532
533 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
534 events[0] |= 0x80; /* Encryption Change */
535 events[5] |= 0x80; /* Encryption Key Refresh Complete */
536 }
2177bab5
JH		 537 }
538
539 if (lmp_inq_rssi_capable(hdev))
540 events[4] |= 0x02; /* Inquiry Result with RSSI */
541
542 if (lmp_sniffsubr_capable(hdev))
543 events[5] |= 0x20; /* Sniff Subrating */
544
545 if (lmp_pause_enc_capable(hdev))
546 events[5] |= 0x80; /* Encryption Key Refresh Complete */
547
548 if (lmp_ext_inq_capable(hdev))
549 events[5] |= 0x40; /* Extended Inquiry Result */
550
551 if (lmp_no_flush_capable(hdev))
552 events[7] |= 0x01; /* Enhanced Flush Complete */
553
554 if (lmp_lsto_capable(hdev))
555 events[6] |= 0x80; /* Link Supervision Timeout Changed */
556
557 if (lmp_ssp_capable(hdev)) {
558 events[6] |= 0x01; /* IO Capability Request */
559 events[6] |= 0x02; /* IO Capability Response */
560 events[6] |= 0x04; /* User Confirmation Request */
561 events[6] |= 0x08; /* User Passkey Request */
562 events[6] |= 0x10; /* Remote OOB Data Request */
563 events[6] |= 0x20; /* Simple Pairing Complete */
564 events[7] |= 0x04; /* User Passkey Notification */
565 events[7] |= 0x08; /* Keypress Notification */
566 events[7] |= 0x10; /* Remote Host Supported
567 * Features Notification
568 */
569 }
570
571 if (lmp_le_capable(hdev))
572 events[7] |= 0x20; /* LE Meta-Event */
573
42c6b129 574 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 575}
576
42c6b129 577static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 578{
42c6b129
JH		 579 struct hci_dev *hdev = req->hdev;
580
2177bab5 581 if (lmp_bredr_capable(hdev))
42c6b129 582 bredr_setup(req);
56f87901
JH		 583 else
584 clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
2177bab5
JH		 585
586 if (lmp_le_capable(hdev))
42c6b129 587 le_setup(req);
2177bab5 588
0f3adeae
MH		 589 /* All Bluetooth 1.2 and later controllers should support the
590 * HCI command for reading the local supported commands.
591 *
592 * Unfortunately some controllers indicate Bluetooth 1.2 support,
593 * but do not have support for this command. If that is the case,
594 * the driver can quirk the behavior and skip reading the local
595 * supported commands.
3f8e2d75 596 */
0f3adeae
MH		 597 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
598 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
42c6b129 599 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 600
601 if (lmp_ssp_capable(hdev)) {
57af75a8
MH		 602 /* When SSP is available, then the host features page
603 * should also be available as well. However some
604 * controllers list the max_page as 0 as long as SSP
605 * has not been enabled. To achieve proper debugging
606 * output, force the minimum max_page to 1 at least.
607 */
608 hdev->max_page = 0x01;
609
2177bab5
JH		 610 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
611 u8 mode = 0x01;
574ea3c7 612
42c6b129
JH		 613 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
614 sizeof(mode), &mode);
2177bab5
JH		 615 } else {
616 struct hci_cp_write_eir cp;
617
618 memset(hdev->eir, 0, sizeof(hdev->eir));
619 memset(&cp, 0, sizeof(cp));
620
42c6b129 621 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 622 }
623 }
624
043ec9bf
MH		 625 if (lmp_inq_rssi_capable(hdev) ||
626 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
04422da9
MH		 627 u8 mode;
628
629 /* If Extended Inquiry Result events are supported, then
630 * they are clearly preferred over Inquiry Result with RSSI
631 * events.
632 */
633 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
634
635 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
636 }
2177bab5
JH		 637
638 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 639 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 640
641 if (lmp_ext_feat_capable(hdev)) {
642 struct hci_cp_read_local_ext_features cp;
643
644 cp.page = 0x01;
42c6b129
JH		 645 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
646 sizeof(cp), &cp);
2177bab5
JH		 647 }
648
649 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
650 u8 enable = 1;
42c6b129
JH		 651 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
652 &enable);
2177bab5
JH		 653 }
654}
655
42c6b129 656static void hci_setup_link_policy(struct hci_request *req)
2177bab5 657{
42c6b129 658 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 659 struct hci_cp_write_def_link_policy cp;
660 u16 link_policy = 0;
661
662 if (lmp_rswitch_capable(hdev))
663 link_policy |= HCI_LP_RSWITCH;
664 if (lmp_hold_capable(hdev))
665 link_policy |= HCI_LP_HOLD;
666 if (lmp_sniff_capable(hdev))
667 link_policy |= HCI_LP_SNIFF;
668 if (lmp_park_capable(hdev))
669 link_policy |= HCI_LP_PARK;
670
671 cp.policy = cpu_to_le16(link_policy);
42c6b129 672 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 673}
674
42c6b129 675static void hci_set_le_support(struct hci_request *req)
2177bab5 676{
42c6b129 677 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 678 struct hci_cp_write_le_host_supported cp;
679
c73eee91
JH		 680 /* LE-only devices do not support explicit enablement */
681 if (!lmp_bredr_capable(hdev))
682 return;
683
2177bab5
JH		 684 memset(&cp, 0, sizeof(cp));
685
686 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
687 cp.le = 0x01;
32226e4f 688 cp.simul = 0x00;
2177bab5
JH		 689 }
690
691 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 692 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
693 &cp);
2177bab5
JH		 694}
695
d62e6d67
JH		 696static void hci_set_event_mask_page_2(struct hci_request *req)
697{
698 struct hci_dev *hdev = req->hdev;
699 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
700
701 /* If Connectionless Slave Broadcast master role is supported
702 * enable all necessary events for it.
703 */
53b834d2 704 if (lmp_csb_master_capable(hdev)) {
d62e6d67
JH		 705 events[1] |= 0x40; /* Triggered Clock Capture */
706 events[1] |= 0x80; /* Synchronization Train Complete */
707 events[2] |= 0x10; /* Slave Page Response Timeout */
708 events[2] |= 0x20; /* CSB Channel Map Change */
709 }
710
711 /* If Connectionless Slave Broadcast slave role is supported
712 * enable all necessary events for it.
713 */
53b834d2 714 if (lmp_csb_slave_capable(hdev)) {
d62e6d67
JH		 715 events[2] |= 0x01; /* Synchronization Train Received */
716 events[2] |= 0x02; /* CSB Receive */
717 events[2] |= 0x04; /* CSB Timeout */
718 events[2] |= 0x08; /* Truncated Page Complete */
719 }
720
40c59fcb 721 /* Enable Authenticated Payload Timeout Expired event if supported */
cd7ca0ec 722 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
40c59fcb
MH		 723 events[2] |= 0x80;
724
d62e6d67
JH		 725 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
726}
727
42c6b129 728static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 729{
42c6b129 730 struct hci_dev *hdev = req->hdev;
d2c5d77f 731 u8 p;
42c6b129 732
0da71f1b
MH		 733 hci_setup_event_mask(req);
734
48ce62c4
MH		 735 if (hdev->commands[6] & 0x20) {
736 struct hci_cp_read_stored_link_key cp;
737
738 bacpy(&cp.bdaddr, BDADDR_ANY);
739 cp.read_all = 0x01;
740 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
741 }
742
2177bab5 743 if (hdev->commands[5] & 0x10)
42c6b129 744 hci_setup_link_policy(req);
2177bab5 745
417287de
MH		 746 if (hdev->commands[8] & 0x01)
747 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
748
749 /* Some older Broadcom based Bluetooth 1.2 controllers do not
750 * support the Read Page Scan Type command. Check support for
751 * this command in the bit mask of supported commands.
752 */
753 if (hdev->commands[13] & 0x01)
754 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
755
9193c6e8
AG		 756 if (lmp_le_capable(hdev)) {
757 u8 events[8];
758
759 memset(events, 0, sizeof(events));
4d6c705b
MH		 760 events[0] = 0x0f;
761
762 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
763 events[0] |= 0x10; /* LE Long Term Key Request */
662bc2e6
AG		 764
765 /* If controller supports the Connection Parameters Request
766 * Link Layer Procedure, enable the corresponding event.
767 */
768 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
769 events[0] |= 0x20; /* LE Remote Connection
770 * Parameter Request
771 */
772
a9f6068e
MH		 773 /* If the controller supports the Data Length Extension
774 * feature, enable the corresponding event.
775 */
776 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
777 events[0] |= 0x40; /* LE Data Length Change */
778
4b71bba4
MH		 779 /* If the controller supports Extended Scanner Filter
780 * Policies, enable the correspondig event.
781 */
782 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
783 events[1] |= 0x04; /* LE Direct Advertising
784 * Report
785 */
786
5a34bd5f
MH		 787 /* If the controller supports the LE Read Local P-256
788 * Public Key command, enable the corresponding event.
789 */
790 if (hdev->commands[34] & 0x02)
791 events[0] |= 0x80; /* LE Read Local P-256
792 * Public Key Complete
793 */
794
795 /* If the controller supports the LE Generate DHKey
796 * command, enable the corresponding event.
797 */
798 if (hdev->commands[34] & 0x04)
799 events[1] |= 0x01; /* LE Generate DHKey Complete */
800
9193c6e8
AG		 801 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
802 events);
803
15a49cca
MH		 804 if (hdev->commands[25] & 0x40) {
805 /* Read LE Advertising Channel TX Power */
806 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
807 }
808
a9f6068e
MH		 809 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
810 /* Read LE Maximum Data Length */
811 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
812
813 /* Read LE Suggested Default Data Length */
814 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
815 }
816
42c6b129 817 hci_set_le_support(req);
9193c6e8 818 }
d2c5d77f
JH		 819
820 /* Read features beyond page 1 if available */
821 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
822 struct hci_cp_read_local_ext_features cp;
823
824 cp.page = p;
825 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
826 sizeof(cp), &cp);
827 }
2177bab5
JH		 828}
829
5d4e7e8d
JH		 830static void hci_init4_req(struct hci_request *req, unsigned long opt)
831{
832 struct hci_dev *hdev = req->hdev;
833
36f260ce
MH		 834 /* Some Broadcom based Bluetooth controllers do not support the
835 * Delete Stored Link Key command. They are clearly indicating its
836 * absence in the bit mask of supported commands.
837 *
838 * Check the supported commands and only if the the command is marked
839 * as supported send it. If not supported assume that the controller
840 * does not have actual support for stored link keys which makes this
841 * command redundant anyway.
842 *
843 * Some controllers indicate that they support handling deleting
844 * stored link keys, but they don't. The quirk lets a driver
845 * just disable this command.
846 */
847 if (hdev->commands[6] & 0x80 &&
848 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
849 struct hci_cp_delete_stored_link_key cp;
850
851 bacpy(&cp.bdaddr, BDADDR_ANY);
852 cp.delete_all = 0x01;
853 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
854 sizeof(cp), &cp);
855 }
856
d62e6d67
JH		 857 /* Set event mask page 2 if the HCI command for it is supported */
858 if (hdev->commands[22] & 0x04)
859 hci_set_event_mask_page_2(req);
860
109e3191
MH		 861 /* Read local codec list if the HCI command is supported */
862 if (hdev->commands[29] & 0x20)
863 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
864
f4fe73ed
MH		 865 /* Get MWS transport configuration if the HCI command is supported */
866 if (hdev->commands[30] & 0x08)
867 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
868
5d4e7e8d 869 /* Check for Synchronization Train support */
53b834d2 870 if (lmp_sync_train_capable(hdev))
5d4e7e8d 871 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
a6d0d690
MH		 872
873 /* Enable Secure Connections if supported and configured */
574ea3c7
MH		 874 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags) &&
875 bredr_sc_enabled(hdev)) {
a6d0d690 876 u8 support = 0x01;
574ea3c7 877
a6d0d690
MH		 878 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
879 sizeof(support), &support);
880 }
5d4e7e8d
JH		 881}
882
2177bab5
JH		 883static int __hci_init(struct hci_dev *hdev)
884{
885 int err;
886
887 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
888 if (err < 0)
889 return err;
890
4b4148e9
MH		 891 /* The Device Under Test (DUT) mode is special and available for
892 * all controller types. So just create it early on.
893 */
894 if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
895 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
896 &dut_mode_fops);
897 }
898
2177bab5
JH		 899 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
900 * BR/EDR/LE type controllers. AMP controllers only need the
901 * first stage init.
902 */
903 if (hdev->dev_type != HCI_BREDR)
904 return 0;
905
906 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
907 if (err < 0)
908 return err;
909
5d4e7e8d
JH		 910 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
911 if (err < 0)
912 return err;
913
baf27f6e
MH		 914 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
915 if (err < 0)
916 return err;
917
ec6cef9c
MH		 918 /* This function is only called when the controller is actually in
919 * configured state. When the controller is marked as unconfigured,
920 * this initialization procedure is not run.
921 *
922 * It means that it is possible that a controller runs through its
923 * setup phase and then discovers missing settings. If that is the
924 * case, then this function will not be called. It then will only
925 * be called during the config phase.
926 *
927 * So only when in setup phase or config phase, create the debugfs
928 * entries and register the SMP channels.
baf27f6e 929 */
ec6cef9c
MH		 930 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
931 !test_bit(HCI_CONFIG, &hdev->dev_flags))
baf27f6e
MH		 932 return 0;
933
60c5f5fb
MH		 934 hci_debugfs_create_common(hdev);
935
71c3b60e 936 if (lmp_bredr_capable(hdev))
60c5f5fb 937 hci_debugfs_create_bredr(hdev);
2bfa3531 938
162a3bac 939 if (lmp_le_capable(hdev))
60c5f5fb 940 hci_debugfs_create_le(hdev);
e7b8fc92 941
baf27f6e 942 return 0;
2177bab5
JH		 943}
944
0ebca7d6
MH		 945static void hci_init0_req(struct hci_request *req, unsigned long opt)
946{
947 struct hci_dev *hdev = req->hdev;
948
949 BT_DBG("%s %ld", hdev->name, opt);
950
951 /* Reset */
952 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
953 hci_reset_req(req, 0);
954
955 /* Read Local Version */
956 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
957
958 /* Read BD Address */
959 if (hdev->set_bdaddr)
960 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
961}
962
963static int __hci_unconf_init(struct hci_dev *hdev)
964{
965 int err;
966
cc78b44b
MH		 967 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
968 return 0;
969
0ebca7d6
MH		 970 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
971 if (err < 0)
972 return err;
973
974 return 0;
975}
976
42c6b129 977static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 978{
979 __u8 scan = opt;
980
42c6b129 981 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 982
983 /* Inquiry and Page scans */
42c6b129 984 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 985}
986
42c6b129 987static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 988{
989 __u8 auth = opt;
990
42c6b129 991 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 992
993 /* Authentication */
42c6b129 994 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 995}
996
42c6b129 997static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 998{
999 __u8 encrypt = opt;
1000
42c6b129 1001 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 1002
e4e8e37c 1003 /* Encryption */
42c6b129 1004 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 1005}
1006
42c6b129 1007static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 1008{
1009 __le16 policy = cpu_to_le16(opt);
1010
42c6b129 1011 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 1012
1013 /* Default link policy */
42c6b129 1014 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 1015}
1016
8e87d142 1017/* Get HCI device by index.
1da177e4
LT		 1018 * Device is held on return. */
1019struct hci_dev *hci_dev_get(int index)
1020{
8035ded4 1021 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 1022
1023 BT_DBG("%d", index);
1024
1025 if (index < 0)
1026 return NULL;
1027
1028 read_lock(&hci_dev_list_lock);
8035ded4 1029 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 1030 if (d->id == index) {
1031 hdev = hci_dev_hold(d);
1032 break;
1033 }
1034 }
1035 read_unlock(&hci_dev_list_lock);
1036 return hdev;
1037}
1da177e4
LT		 1038
1039/* ---- Inquiry support ---- */
ff9ef578 1040
30dc78e1
JH		 1041bool hci_discovery_active(struct hci_dev *hdev)
1042{
1043 struct discovery_state *discov = &hdev->discovery;
1044
6fbe195d 1045 switch (discov->state) {
343f935b 1046 case DISCOVERY_FINDING:
6fbe195d 1047 case DISCOVERY_RESOLVING:
30dc78e1
JH		 1048 return true;
1049
6fbe195d
AG		 1050 default:
1051 return false;
1052 }
30dc78e1
JH		 1053}
1054
ff9ef578
JH		 1055void hci_discovery_set_state(struct hci_dev *hdev, int state)
1056{
bb3e0a33
JH		 1057 int old_state = hdev->discovery.state;
1058
ff9ef578
JH		 1059 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1060
bb3e0a33 1061 if (old_state == state)
ff9ef578
JH		 1062 return;
1063
bb3e0a33
JH		 1064 hdev->discovery.state = state;
1065
ff9ef578
JH		 1066 switch (state) {
1067 case DISCOVERY_STOPPED:
c54c3860
AG		 1068 hci_update_background_scan(hdev);
1069
bb3e0a33 1070 if (old_state != DISCOVERY_STARTING)
7b99b659 1071 mgmt_discovering(hdev, 0);
ff9ef578
JH		 1072 break;
1073 case DISCOVERY_STARTING:
1074 break;
343f935b 1075 case DISCOVERY_FINDING:
ff9ef578
JH		 1076 mgmt_discovering(hdev, 1);
1077 break;
30dc78e1
JH		 1078 case DISCOVERY_RESOLVING:
1079 break;
ff9ef578
JH		 1080 case DISCOVERY_STOPPING:
1081 break;
1082 }
ff9ef578
JH		 1083}
1084
1f9b9a5d 1085void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 1086{
30883512 1087 struct discovery_state *cache = &hdev->discovery;
b57c1a56 1088 struct inquiry_entry *p, *n;
1da177e4 1089
561aafbc
JH		 1090 list_for_each_entry_safe(p, n, &cache->all, all) {
1091 list_del(&p->all);
b57c1a56 1092 kfree(p);
1da177e4 1093 }
561aafbc
JH		 1094
1095 INIT_LIST_HEAD(&cache->unknown);
1096 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 1097}
1098
a8c5fb1a
GP		 1099struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1100 bdaddr_t *bdaddr)
1da177e4 1101{
30883512 1102 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 1103 struct inquiry_entry *e;
1104
6ed93dc6 1105 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 1106
561aafbc
JH		 1107 list_for_each_entry(e, &cache->all, all) {
1108 if (!bacmp(&e->data.bdaddr, bdaddr))
1109 return e;
1110 }
1111
1112 return NULL;
1113}
1114
1115struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 1116 bdaddr_t *bdaddr)
561aafbc 1117{
30883512 1118 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 1119 struct inquiry_entry *e;
1120
6ed93dc6 1121 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 1122
1123 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 1124 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 1125 return e;
1126 }
1127
1128 return NULL;
1da177e4
LT		 1129}
1130
30dc78e1 1131struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 1132 bdaddr_t *bdaddr,
1133 int state)
30dc78e1
JH		 1134{
1135 struct discovery_state *cache = &hdev->discovery;
1136 struct inquiry_entry *e;
1137
6ed93dc6 1138 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 1139
1140 list_for_each_entry(e, &cache->resolve, list) {
1141 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1142 return e;
1143 if (!bacmp(&e->data.bdaddr, bdaddr))
1144 return e;
1145 }
1146
1147 return NULL;
1148}
1149
a3d4e20a 1150void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 1151 struct inquiry_entry *ie)
a3d4e20a
JH		 1152{
1153 struct discovery_state *cache = &hdev->discovery;
1154 struct list_head *pos = &cache->resolve;
1155 struct inquiry_entry *p;
1156
1157 list_del(&ie->list);
1158
1159 list_for_each_entry(p, &cache->resolve, list) {
1160 if (p->name_state != NAME_PENDING &&
a8c5fb1a 1161 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 1162 break;
1163 pos = &p->list;
1164 }
1165
1166 list_add(&ie->list, pos);
1167}
1168
af58925c
MH		 1169u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1170 bool name_known)
1da177e4 1171{
30883512 1172 struct discovery_state *cache = &hdev->discovery;
70f23020 1173 struct inquiry_entry *ie;
af58925c 1174 u32 flags = 0;
1da177e4 1175
6ed93dc6 1176 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 1177
6928a924 1178 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
2b2fec4d 1179
af58925c
MH		 1180 if (!data->ssp_mode)
1181 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
388fc8fa 1182
70f23020 1183 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 1184 if (ie) {
af58925c
MH		 1185 if (!ie->data.ssp_mode)
1186 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
388fc8fa 1187
a3d4e20a 1188 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 1189 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 1190 ie->data.rssi = data->rssi;
1191 hci_inquiry_cache_update_resolve(hdev, ie);
1192 }
1193
561aafbc 1194 goto update;
a3d4e20a 1195 }
561aafbc
JH		 1196
1197 /* Entry not in the cache. Add new one. */
27f70f3e 1198 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
af58925c
MH		 1199 if (!ie) {
1200 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1201 goto done;
1202 }
561aafbc
JH		 1203
1204 list_add(&ie->all, &cache->all);
1205
1206 if (name_known) {
1207 ie->name_state = NAME_KNOWN;
1208 } else {
1209 ie->name_state = NAME_NOT_KNOWN;
1210 list_add(&ie->list, &cache->unknown);
1211 }
70f23020 1212
561aafbc
JH		 1213update:
1214 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 1215 ie->name_state != NAME_PENDING) {
561aafbc
JH		 1216 ie->name_state = NAME_KNOWN;
1217 list_del(&ie->list);
1da177e4
LT		 1218 }
1219
70f23020
AE		 1220 memcpy(&ie->data, data, sizeof(*data));
1221 ie->timestamp = jiffies;
1da177e4 1222 cache->timestamp = jiffies;
3175405b
JH		 1223
1224 if (ie->name_state == NAME_NOT_KNOWN)
af58925c 1225 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
3175405b 1226
af58925c
MH		 1227done:
1228 return flags;
1da177e4
LT		 1229}
1230
1231static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1232{
30883512 1233 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 1234 struct inquiry_info *info = (struct inquiry_info *) buf;
1235 struct inquiry_entry *e;
1236 int copied = 0;
1237
561aafbc 1238 list_for_each_entry(e, &cache->all, all) {
1da177e4 1239 struct inquiry_data *data = &e->data;
b57c1a56
JH		 1240
1241 if (copied >= num)
1242 break;
1243
1da177e4
LT		 1244 bacpy(&info->bdaddr, &data->bdaddr);
1245 info->pscan_rep_mode = data->pscan_rep_mode;
1246 info->pscan_period_mode = data->pscan_period_mode;
1247 info->pscan_mode = data->pscan_mode;
1248 memcpy(info->dev_class, data->dev_class, 3);
1249 info->clock_offset = data->clock_offset;
b57c1a56 1250
1da177e4 1251 info++;
b57c1a56 1252 copied++;
1da177e4
LT		 1253 }
1254
1255 BT_DBG("cache %p, copied %d", cache, copied);
1256 return copied;
1257}
1258
42c6b129 1259static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1260{
1261 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 1262 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 1263 struct hci_cp_inquiry cp;
1264
1265 BT_DBG("%s", hdev->name);
1266
1267 if (test_bit(HCI_INQUIRY, &hdev->flags))
1268 return;
1269
1270 /* Start Inquiry */
1271 memcpy(&cp.lap, &ir->lap, 3);
1272 cp.length = ir->length;
1273 cp.num_rsp = ir->num_rsp;
42c6b129 1274 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 1275}
1276
1277int hci_inquiry(void __user *arg)
1278{
1279 __u8 __user *ptr = arg;
1280 struct hci_inquiry_req ir;
1281 struct hci_dev *hdev;
1282 int err = 0, do_inquiry = 0, max_rsp;
1283 long timeo;
1284 __u8 *buf;
1285
1286 if (copy_from_user(&ir, ptr, sizeof(ir)))
1287 return -EFAULT;
1288
5a08ecce
AE		 1289 hdev = hci_dev_get(ir.dev_id);
1290 if (!hdev)
1da177e4
LT		 1291 return -ENODEV;
1292
0736cfa8
MH		 1293 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1294 err = -EBUSY;
1295 goto done;
1296 }
1297
4a964404 1298 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 1299 err = -EOPNOTSUPP;
1300 goto done;
1301 }
1302
5b69bef5
MH		 1303 if (hdev->dev_type != HCI_BREDR) {
1304 err = -EOPNOTSUPP;
1305 goto done;
1306 }
1307
56f87901
JH		 1308 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1309 err = -EOPNOTSUPP;
1310 goto done;
1311 }
1312
09fd0de5 1313 hci_dev_lock(hdev);
8e87d142 1314 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 1315 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 1316 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 1317 do_inquiry = 1;
1318 }
09fd0de5 1319 hci_dev_unlock(hdev);
1da177e4 1320
04837f64 1321 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 1322
1323 if (do_inquiry) {
01178cd4
JH		 1324 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1325 timeo);
70f23020
AE		 1326 if (err < 0)
1327 goto done;
3e13fa1e
AG		 1328
1329 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1330 * cleared). If it is interrupted by a signal, return -EINTR.
1331 */
74316201 1332 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
3e13fa1e
AG		 1333 TASK_INTERRUPTIBLE))
1334 return -EINTR;
70f23020 1335 }
1da177e4 1336
8fc9ced3
GP		 1337 /* for unlimited number of responses we will use buffer with
1338 * 255 entries
1339 */
1da177e4
LT		 1340 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1341
1342 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1343 * copy it to the user space.
1344 */
01df8c31 1345 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1346 if (!buf) {
1da177e4
LT		 1347 err = -ENOMEM;
1348 goto done;
1349 }
1350
09fd0de5 1351 hci_dev_lock(hdev);
1da177e4 1352 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1353 hci_dev_unlock(hdev);
1da177e4
LT		 1354
1355 BT_DBG("num_rsp %d", ir.num_rsp);
1356
1357 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1358 ptr += sizeof(ir);
1359 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1360 ir.num_rsp))
1da177e4 1361 err = -EFAULT;
8e87d142 1362 } else
1da177e4
LT		 1363 err = -EFAULT;
1364
1365 kfree(buf);
1366
1367done:
1368 hci_dev_put(hdev);
1369 return err;
1370}
1371
cbed0ca1 1372static int hci_dev_do_open(struct hci_dev *hdev)
1da177e4 1373{
1da177e4
LT		 1374 int ret = 0;
1375
1da177e4
LT		 1376 BT_DBG("%s %p", hdev->name, hdev);
1377
1378 hci_req_lock(hdev);
1379
94324962
JH		 1380 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1381 ret = -ENODEV;
1382 goto done;
1383 }
1384
d603b76b
MH		 1385 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1386 !test_bit(HCI_CONFIG, &hdev->dev_flags)) {
a5c8f270
MH		 1387 /* Check for rfkill but allow the HCI setup stage to
1388 * proceed (which in itself doesn't cause any RF activity).
1389 */
1390 if (test_bit(HCI_RFKILLED, &hdev->dev_flags)) {
1391 ret = -ERFKILL;
1392 goto done;
1393 }
1394
1395 /* Check for valid public address or a configured static
1396 * random adddress, but let the HCI setup proceed to
1397 * be able to determine if there is a public address
1398 * or not.
1399 *
c6beca0e
MH		 1400 * In case of user channel usage, it is not important
1401 * if a public address or static random address is
1402 * available.
1403 *
a5c8f270
MH		 1404 * This check is only valid for BR/EDR controllers
1405 * since AMP controllers do not have an address.
1406 */
c6beca0e
MH		 1407 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1408 hdev->dev_type == HCI_BREDR &&
a5c8f270
MH		 1409 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1410 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1411 ret = -EADDRNOTAVAIL;
1412 goto done;
1413 }
611b30f7
MH		 1414 }
1415
1da177e4
LT		 1416 if (test_bit(HCI_UP, &hdev->flags)) {
1417 ret = -EALREADY;
1418 goto done;
1419 }
1420
1da177e4
LT		 1421 if (hdev->open(hdev)) {
1422 ret = -EIO;
1423 goto done;
1424 }
1425
f41c70c4
MH		 1426 atomic_set(&hdev->cmd_cnt, 1);
1427 set_bit(HCI_INIT, &hdev->flags);
1428
af202f84
MH		 1429 if (test_bit(HCI_SETUP, &hdev->dev_flags)) {
1430 if (hdev->setup)
1431 ret = hdev->setup(hdev);
f41c70c4 1432
af202f84
MH		 1433 /* The transport driver can set these quirks before
1434 * creating the HCI device or in its setup callback.
1435 *
1436 * In case any of them is set, the controller has to
1437 * start up as unconfigured.
1438 */
eb1904f4
MH		 1439 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1440 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
89bc22d2 1441 set_bit(HCI_UNCONFIGURED, &hdev->dev_flags);
f41c70c4 1442
0ebca7d6
MH		 1443 /* For an unconfigured controller it is required to
1444 * read at least the version information provided by
1445 * the Read Local Version Information command.
1446 *
1447 * If the set_bdaddr driver callback is provided, then
1448 * also the original Bluetooth public device address
1449 * will be read using the Read BD Address command.
1450 */
1451 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
1452 ret = __hci_unconf_init(hdev);
89bc22d2
MH		 1453 }
1454
9713c17b
MH		 1455 if (test_bit(HCI_CONFIG, &hdev->dev_flags)) {
1456 /* If public address change is configured, ensure that
1457 * the address gets programmed. If the driver does not
1458 * support changing the public address, fail the power
1459 * on procedure.
1460 */
1461 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1462 hdev->set_bdaddr)
24c457e2
MH		 1463 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1464 else
1465 ret = -EADDRNOTAVAIL;
1466 }
1467
f41c70c4 1468 if (!ret) {
4a964404 1469 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
0736cfa8 1470 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
f41c70c4 1471 ret = __hci_init(hdev);
1da177e4
LT		 1472 }
1473
f41c70c4
MH		 1474 clear_bit(HCI_INIT, &hdev->flags);
1475
1da177e4
LT		 1476 if (!ret) {
1477 hci_dev_hold(hdev);
d6bfd59c 1478 set_bit(HCI_RPA_EXPIRED, &hdev->dev_flags);
1da177e4
LT		 1479 set_bit(HCI_UP, &hdev->flags);
1480 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a 1481 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
d603b76b 1482 !test_bit(HCI_CONFIG, &hdev->dev_flags) &&
4a964404 1483 !test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
0736cfa8 1484 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1514b892 1485 hdev->dev_type == HCI_BREDR) {
09fd0de5 1486 hci_dev_lock(hdev);
744cf19e 1487 mgmt_powered(hdev, 1);
09fd0de5 1488 hci_dev_unlock(hdev);
56e5cb86 1489 }
8e87d142 1490 } else {
1da177e4 1491 /* Init failed, cleanup */
3eff45ea 1492 flush_work(&hdev->tx_work);
c347b765 1493 flush_work(&hdev->cmd_work);
b78752cc 1494 flush_work(&hdev->rx_work);
1da177e4
LT		 1495
1496 skb_queue_purge(&hdev->cmd_q);
1497 skb_queue_purge(&hdev->rx_q);
1498
1499 if (hdev->flush)
1500 hdev->flush(hdev);
1501
1502 if (hdev->sent_cmd) {
1503 kfree_skb(hdev->sent_cmd);
1504 hdev->sent_cmd = NULL;
1505 }
1506
1507 hdev->close(hdev);
fee746b0 1508 hdev->flags &= BIT(HCI_RAW);
1da177e4
LT		 1509 }
1510
1511done:
1512 hci_req_unlock(hdev);
1da177e4
LT		 1513 return ret;
1514}
1515
cbed0ca1
JH		 1516/* ---- HCI ioctl helpers ---- */
1517
1518int hci_dev_open(__u16 dev)
1519{
1520 struct hci_dev *hdev;
1521 int err;
1522
1523 hdev = hci_dev_get(dev);
1524 if (!hdev)
1525 return -ENODEV;
1526
4a964404 1527 /* Devices that are marked as unconfigured can only be powered
fee746b0
MH		 1528 * up as user channel. Trying to bring them up as normal devices
1529 * will result into a failure. Only user channel operation is
1530 * possible.
1531 *
1532 * When this function is called for a user channel, the flag
1533 * HCI_USER_CHANNEL will be set first before attempting to
1534 * open the device.
1535 */
4a964404 1536 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
fee746b0
MH		 1537 !test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1538 err = -EOPNOTSUPP;
1539 goto done;
1540 }
1541
e1d08f40
JH		 1542 /* We need to ensure that no other power on/off work is pending
1543 * before proceeding to call hci_dev_do_open. This is
1544 * particularly important if the setup procedure has not yet
1545 * completed.
1546 */
1547 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1548 cancel_delayed_work(&hdev->power_off);
1549
a5c8f270
MH		 1550 /* After this call it is guaranteed that the setup procedure
1551 * has finished. This means that error conditions like RFKILL
1552 * or no valid public or static random address apply.
1553 */
e1d08f40
JH		 1554 flush_workqueue(hdev->req_workqueue);
1555
12aa4f0a 1556 /* For controllers not using the management interface and that
b6ae8457 1557 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
12aa4f0a
MH		 1558 * so that pairing works for them. Once the management interface
1559 * is in use this bit will be cleared again and userspace has
1560 * to explicitly enable it.
1561 */
1562 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags) &&
1563 !test_bit(HCI_MGMT, &hdev->dev_flags))
b6ae8457 1564 set_bit(HCI_BONDABLE, &hdev->dev_flags);
12aa4f0a 1565
cbed0ca1
JH		 1566 err = hci_dev_do_open(hdev);
1567
fee746b0 1568done:
cbed0ca1 1569 hci_dev_put(hdev);
cbed0ca1
JH		 1570 return err;
1571}
1572
d7347f3c
JH		 1573/* This function requires the caller holds hdev->lock */
1574static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1575{
1576 struct hci_conn_params *p;
1577
f161dd41
JH		 1578 list_for_each_entry(p, &hdev->le_conn_params, list) {
1579 if (p->conn) {
1580 hci_conn_drop(p->conn);
f8aaf9b6 1581 hci_conn_put(p->conn);
f161dd41
JH		 1582 p->conn = NULL;
1583 }
d7347f3c 1584 list_del_init(&p->action);
f161dd41 1585 }
d7347f3c
JH		 1586
1587 BT_DBG("All LE pending actions cleared");
1588}
1589
1da177e4
LT		 1590static int hci_dev_do_close(struct hci_dev *hdev)
1591{
1592 BT_DBG("%s %p", hdev->name, hdev);
1593
78c04c0b
VCG		 1594 cancel_delayed_work(&hdev->power_off);
1595
1da177e4
LT		 1596 hci_req_cancel(hdev, ENODEV);
1597 hci_req_lock(hdev);
1598
1599 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
65cc2b49 1600 cancel_delayed_work_sync(&hdev->cmd_timer);
1da177e4
LT		 1601 hci_req_unlock(hdev);
1602 return 0;
1603 }
1604
3eff45ea
GP		 1605 /* Flush RX and TX works */
1606 flush_work(&hdev->tx_work);
b78752cc 1607 flush_work(&hdev->rx_work);
1da177e4 1608
16ab91ab 1609 if (hdev->discov_timeout > 0) {
e0f9309f 1610 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1611 hdev->discov_timeout = 0;
5e5282bb 1612 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
310a3d48 1613 clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1614 }
1615
a8b2d5c2 1616 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1617 cancel_delayed_work(&hdev->service_cache);
1618
7ba8b4be 1619 cancel_delayed_work_sync(&hdev->le_scan_disable);
4518bb0f
JH		 1620
1621 if (test_bit(HCI_MGMT, &hdev->dev_flags))
1622 cancel_delayed_work_sync(&hdev->rpa_expired);
7ba8b4be 1623
76727c02
JH		 1624 /* Avoid potential lockdep warnings from the *_flush() calls by
1625 * ensuring the workqueue is empty up front.
1626 */
1627 drain_workqueue(hdev->workqueue);
1628
09fd0de5 1629 hci_dev_lock(hdev);
1aeb9c65 1630
8f502f84
JH		 1631 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1632
1aeb9c65
JH		 1633 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
1634 if (hdev->dev_type == HCI_BREDR)
1635 mgmt_powered(hdev, 0);
1636 }
1637
1f9b9a5d 1638 hci_inquiry_cache_flush(hdev);
d7347f3c 1639 hci_pend_le_actions_clear(hdev);
f161dd41 1640 hci_conn_hash_flush(hdev);
09fd0de5 1641 hci_dev_unlock(hdev);
1da177e4 1642
64dae967
MH		 1643 smp_unregister(hdev);
1644
1da177e4
LT		 1645 hci_notify(hdev, HCI_DEV_DOWN);
1646
1647 if (hdev->flush)
1648 hdev->flush(hdev);
1649
1650 /* Reset device */
1651 skb_queue_purge(&hdev->cmd_q);
1652 atomic_set(&hdev->cmd_cnt, 1);
4a964404
MH		 1653 if (!test_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1654 !test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) &&
a6c511c6 1655 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1656 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1657 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1658 clear_bit(HCI_INIT, &hdev->flags);
1659 }
1660
c347b765
GP		 1661 /* flush cmd work */
1662 flush_work(&hdev->cmd_work);
1da177e4
LT		 1663
1664 /* Drop queues */
1665 skb_queue_purge(&hdev->rx_q);
1666 skb_queue_purge(&hdev->cmd_q);
1667 skb_queue_purge(&hdev->raw_q);
1668
1669 /* Drop last sent command */
1670 if (hdev->sent_cmd) {
65cc2b49 1671 cancel_delayed_work_sync(&hdev->cmd_timer);
1da177e4
LT		 1672 kfree_skb(hdev->sent_cmd);
1673 hdev->sent_cmd = NULL;
1674 }
1675
b6ddb638
JH		 1676 kfree_skb(hdev->recv_evt);
1677 hdev->recv_evt = NULL;
1678
1da177e4
LT		 1679 /* After this point our queues are empty
1680 * and no tasks are scheduled. */
1681 hdev->close(hdev);
1682
35b973c9 1683 /* Clear flags */
fee746b0 1684 hdev->flags &= BIT(HCI_RAW);
35b973c9
JH		 1685 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1686
ced5c338 1687 /* Controller radio is available but is currently powered down */
536619e8 1688 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 1689
e59fda8d 1690 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1691 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
7a4cd51d 1692 bacpy(&hdev->random_addr, BDADDR_ANY);
e59fda8d 1693
1da177e4
LT		 1694 hci_req_unlock(hdev);
1695
1696 hci_dev_put(hdev);
1697 return 0;
1698}
1699
1700int hci_dev_close(__u16 dev)
1701{
1702 struct hci_dev *hdev;
1703 int err;
1704
70f23020
AE		 1705 hdev = hci_dev_get(dev);
1706 if (!hdev)
1da177e4 1707 return -ENODEV;
8ee56540 1708
0736cfa8
MH		 1709 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1710 err = -EBUSY;
1711 goto done;
1712 }
1713
8ee56540
MH		 1714 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1715 cancel_delayed_work(&hdev->power_off);
1716
1da177e4 1717 err = hci_dev_do_close(hdev);
8ee56540 1718
0736cfa8 1719done:
1da177e4
LT		 1720 hci_dev_put(hdev);
1721 return err;
1722}
1723
5c912495 1724static int hci_dev_do_reset(struct hci_dev *hdev)
1da177e4 1725{
5c912495 1726 int ret;
1da177e4 1727
5c912495 1728 BT_DBG("%s %p", hdev->name, hdev);
1da177e4
LT		 1729
1730 hci_req_lock(hdev);
1da177e4 1731
1da177e4
LT		 1732 /* Drop queues */
1733 skb_queue_purge(&hdev->rx_q);
1734 skb_queue_purge(&hdev->cmd_q);
1735
76727c02
JH		 1736 /* Avoid potential lockdep warnings from the *_flush() calls by
1737 * ensuring the workqueue is empty up front.
1738 */
1739 drain_workqueue(hdev->workqueue);
1740
09fd0de5 1741 hci_dev_lock(hdev);
1f9b9a5d 1742 hci_inquiry_cache_flush(hdev);
1da177e4 1743 hci_conn_hash_flush(hdev);
09fd0de5 1744 hci_dev_unlock(hdev);
1da177e4
LT		 1745
1746 if (hdev->flush)
1747 hdev->flush(hdev);
1748
8e87d142 1749 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1750 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4 1751
fee746b0 1752 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4 1753
1da177e4 1754 hci_req_unlock(hdev);
1da177e4
LT		 1755 return ret;
1756}
1757
5c912495
MH		 1758int hci_dev_reset(__u16 dev)
1759{
1760 struct hci_dev *hdev;
1761 int err;
1762
1763 hdev = hci_dev_get(dev);
1764 if (!hdev)
1765 return -ENODEV;
1766
1767 if (!test_bit(HCI_UP, &hdev->flags)) {
1768 err = -ENETDOWN;
1769 goto done;
1770 }
1771
1772 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1773 err = -EBUSY;
1774 goto done;
1775 }
1776
1777 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
1778 err = -EOPNOTSUPP;
1779 goto done;
1780 }
1781
1782 err = hci_dev_do_reset(hdev);
1783
1784done:
1785 hci_dev_put(hdev);
1786 return err;
1787}
1788
1da177e4
LT		 1789int hci_dev_reset_stat(__u16 dev)
1790{
1791 struct hci_dev *hdev;
1792 int ret = 0;
1793
70f23020
AE		 1794 hdev = hci_dev_get(dev);
1795 if (!hdev)
1da177e4
LT		 1796 return -ENODEV;
1797
0736cfa8
MH		 1798 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1799 ret = -EBUSY;
1800 goto done;
1801 }
1802
4a964404 1803 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 1804 ret = -EOPNOTSUPP;
1805 goto done;
1806 }
1807
1da177e4
LT		 1808 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1809
0736cfa8 1810done:
1da177e4 1811 hci_dev_put(hdev);
1da177e4
LT		 1812 return ret;
1813}
1814
123abc08
JH		 1815static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1816{
bc6d2d04 1817 bool conn_changed, discov_changed;
123abc08
JH		 1818
1819 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1820
1821 if ((scan & SCAN_PAGE))
1822 conn_changed = !test_and_set_bit(HCI_CONNECTABLE,
1823 &hdev->dev_flags);
1824 else
1825 conn_changed = test_and_clear_bit(HCI_CONNECTABLE,
1826 &hdev->dev_flags);
1827
bc6d2d04
JH		 1828 if ((scan & SCAN_INQUIRY)) {
1829 discov_changed = !test_and_set_bit(HCI_DISCOVERABLE,
1830 &hdev->dev_flags);
1831 } else {
1832 clear_bit(HCI_LIMITED_DISCOVERABLE, &hdev->dev_flags);
1833 discov_changed = test_and_clear_bit(HCI_DISCOVERABLE,
1834 &hdev->dev_flags);
1835 }
1836
123abc08
JH		 1837 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1838 return;
1839
bc6d2d04
JH		 1840 if (conn_changed || discov_changed) {
1841 /* In case this was disabled through mgmt */
1842 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
1843
1844 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
1845 mgmt_update_adv_data(hdev);
1846
123abc08 1847 mgmt_new_settings(hdev);
bc6d2d04 1848 }
123abc08
JH		 1849}
1850
1da177e4
LT		 1851int hci_dev_cmd(unsigned int cmd, void __user *arg)
1852{
1853 struct hci_dev *hdev;
1854 struct hci_dev_req dr;
1855 int err = 0;
1856
1857 if (copy_from_user(&dr, arg, sizeof(dr)))
1858 return -EFAULT;
1859
70f23020
AE		 1860 hdev = hci_dev_get(dr.dev_id);
1861 if (!hdev)
1da177e4
LT		 1862 return -ENODEV;
1863
0736cfa8
MH		 1864 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1865 err = -EBUSY;
1866 goto done;
1867 }
1868
4a964404 1869 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
fee746b0
MH		 1870 err = -EOPNOTSUPP;
1871 goto done;
1872 }
1873
5b69bef5
MH		 1874 if (hdev->dev_type != HCI_BREDR) {
1875 err = -EOPNOTSUPP;
1876 goto done;
1877 }
1878
56f87901
JH		 1879 if (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
1880 err = -EOPNOTSUPP;
1881 goto done;
1882 }
1883
1da177e4
LT		 1884 switch (cmd) {
1885 case HCISETAUTH:
01178cd4
JH		 1886 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1887 HCI_INIT_TIMEOUT);
1da177e4
LT		 1888 break;
1889
1890 case HCISETENCRYPT:
1891 if (!lmp_encrypt_capable(hdev)) {
1892 err = -EOPNOTSUPP;
1893 break;
1894 }
1895
1896 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1897 /* Auth must be enabled first */
01178cd4
JH		 1898 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1899 HCI_INIT_TIMEOUT);
1da177e4
LT		 1900 if (err)
1901 break;
1902 }
1903
01178cd4
JH		 1904 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1905 HCI_INIT_TIMEOUT);
1da177e4
LT		 1906 break;
1907
1908 case HCISETSCAN:
01178cd4
JH		 1909 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1910 HCI_INIT_TIMEOUT);
91a668b0 1911
bc6d2d04
JH		 1912 /* Ensure that the connectable and discoverable states
1913 * get correctly modified as this was a non-mgmt change.
91a668b0 1914 */
123abc08
JH		 1915 if (!err)
1916 hci_update_scan_state(hdev, dr.dev_opt);
1da177e4
LT		 1917 break;
1918
1da177e4 1919 case HCISETLINKPOL:
01178cd4
JH		 1920 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1921 HCI_INIT_TIMEOUT);
1da177e4
LT		 1922 break;
1923
1924 case HCISETLINKMODE:
e4e8e37c
MH		 1925 hdev->link_mode = ((__u16) dr.dev_opt) &
1926 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1927 break;
1928
1929 case HCISETPTYPE:
1930 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1931 break;
1932
1933 case HCISETACLMTU:
e4e8e37c
MH		 1934 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1935 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1936 break;
1937
1938 case HCISETSCOMTU:
e4e8e37c
MH		 1939 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1940 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1941 break;
1942
1943 default:
1944 err = -EINVAL;
1945 break;
1946 }
e4e8e37c 1947
0736cfa8 1948done:
1da177e4
LT		 1949 hci_dev_put(hdev);
1950 return err;
1951}
1952
1953int hci_get_dev_list(void __user *arg)
1954{
8035ded4 1955 struct hci_dev *hdev;
1da177e4
LT		 1956 struct hci_dev_list_req *dl;
1957 struct hci_dev_req *dr;
1da177e4
LT		 1958 int n = 0, size, err;
1959 __u16 dev_num;
1960
1961 if (get_user(dev_num, (__u16 __user *) arg))
1962 return -EFAULT;
1963
1964 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1965 return -EINVAL;
1966
1967 size = sizeof(*dl) + dev_num * sizeof(*dr);
1968
70f23020
AE		 1969 dl = kzalloc(size, GFP_KERNEL);
1970 if (!dl)
1da177e4
LT		 1971 return -ENOMEM;
1972
1973 dr = dl->dev_req;
1974
f20d09d5 1975 read_lock(&hci_dev_list_lock);
8035ded4 1976 list_for_each_entry(hdev, &hci_dev_list, list) {
2e84d8db 1977 unsigned long flags = hdev->flags;
c542a06c 1978
2e84d8db
MH		 1979 /* When the auto-off is configured it means the transport
1980 * is running, but in that case still indicate that the
1981 * device is actually down.
1982 */
1983 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1984 flags &= ~BIT(HCI_UP);
c542a06c 1985
1da177e4 1986 (dr + n)->dev_id = hdev->id;
2e84d8db 1987 (dr + n)->dev_opt = flags;
c542a06c 1988
1da177e4
LT		 1989 if (++n >= dev_num)
1990 break;
1991 }
f20d09d5 1992 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1993
1994 dl->dev_num = n;
1995 size = sizeof(*dl) + n * sizeof(*dr);
1996
1997 err = copy_to_user(arg, dl, size);
1998 kfree(dl);
1999
2000 return err ? -EFAULT : 0;
2001}
2002
2003int hci_get_dev_info(void __user *arg)
2004{
2005 struct hci_dev *hdev;
2006 struct hci_dev_info di;
2e84d8db 2007 unsigned long flags;
1da177e4
LT		 2008 int err = 0;
2009
2010 if (copy_from_user(&di, arg, sizeof(di)))
2011 return -EFAULT;
2012
70f23020
AE		 2013 hdev = hci_dev_get(di.dev_id);
2014 if (!hdev)
1da177e4
LT		 2015 return -ENODEV;
2016
2e84d8db
MH		 2017 /* When the auto-off is configured it means the transport
2018 * is running, but in that case still indicate that the
2019 * device is actually down.
2020 */
2021 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
2022 flags = hdev->flags & ~BIT(HCI_UP);
2023 else
2024 flags = hdev->flags;
c542a06c 2025
1da177e4
LT		 2026 strcpy(di.name, hdev->name);
2027 di.bdaddr = hdev->bdaddr;
60f2a3ed 2028 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2e84d8db 2029 di.flags = flags;
1da177e4 2030 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 2031 if (lmp_bredr_capable(hdev)) {
2032 di.acl_mtu = hdev->acl_mtu;
2033 di.acl_pkts = hdev->acl_pkts;
2034 di.sco_mtu = hdev->sco_mtu;
2035 di.sco_pkts = hdev->sco_pkts;
2036 } else {
2037 di.acl_mtu = hdev->le_mtu;
2038 di.acl_pkts = hdev->le_pkts;
2039 di.sco_mtu = 0;
2040 di.sco_pkts = 0;
2041 }
1da177e4
LT		 2042 di.link_policy = hdev->link_policy;
2043 di.link_mode = hdev->link_mode;
2044
2045 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2046 memcpy(&di.features, &hdev->features, sizeof(di.features));
2047
2048 if (copy_to_user(arg, &di, sizeof(di)))
2049 err = -EFAULT;
2050
2051 hci_dev_put(hdev);
2052
2053 return err;
2054}
2055
2056/* ---- Interface to HCI drivers ---- */
2057
611b30f7
MH		 2058static int hci_rfkill_set_block(void *data, bool blocked)
2059{
2060 struct hci_dev *hdev = data;
2061
2062 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2063
0736cfa8
MH		 2064 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags))
2065 return -EBUSY;
2066
5e130367
JH		 2067 if (blocked) {
2068 set_bit(HCI_RFKILLED, &hdev->dev_flags);
d603b76b
MH		 2069 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
2070 !test_bit(HCI_CONFIG, &hdev->dev_flags))
bf543036 2071 hci_dev_do_close(hdev);
5e130367
JH		 2072 } else {
2073 clear_bit(HCI_RFKILLED, &hdev->dev_flags);
1025c04c 2074 }
611b30f7
MH		 2075
2076 return 0;
2077}
2078
2079static const struct rfkill_ops hci_rfkill_ops = {
2080 .set_block = hci_rfkill_set_block,
2081};
2082
ab81cbf9
JH		 2083static void hci_power_on(struct work_struct *work)
2084{
2085 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 2086 int err;
ab81cbf9
JH		 2087
2088 BT_DBG("%s", hdev->name);
2089
cbed0ca1 2090 err = hci_dev_do_open(hdev);
96570ffc 2091 if (err < 0) {
3ad67582 2092 hci_dev_lock(hdev);
96570ffc 2093 mgmt_set_powered_failed(hdev, err);
3ad67582 2094 hci_dev_unlock(hdev);
ab81cbf9 2095 return;
96570ffc 2096 }
ab81cbf9 2097
a5c8f270
MH		 2098 /* During the HCI setup phase, a few error conditions are
2099 * ignored and they need to be checked now. If they are still
2100 * valid, it is important to turn the device back off.
2101 */
2102 if (test_bit(HCI_RFKILLED, &hdev->dev_flags) ||
4a964404 2103 test_bit(HCI_UNCONFIGURED, &hdev->dev_flags) ||
a5c8f270
MH		 2104 (hdev->dev_type == HCI_BREDR &&
2105 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2106 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
bf543036
JH		 2107 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2108 hci_dev_do_close(hdev);
2109 } else if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
19202573
JH		 2110 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2111 HCI_AUTO_OFF_TIMEOUT);
bf543036 2112 }
ab81cbf9 2113
fee746b0 2114 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags)) {
4a964404
MH		 2115 /* For unconfigured devices, set the HCI_RAW flag
2116 * so that userspace can easily identify them.
4a964404
MH		 2117 */
2118 if (test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
2119 set_bit(HCI_RAW, &hdev->flags);
0602a8ad
MH		 2120
2121 /* For fully configured devices, this will send
2122 * the Index Added event. For unconfigured devices,
2123 * it will send Unconfigued Index Added event.
2124 *
2125 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2126 * and no event will be send.
2127 */
2128 mgmt_index_added(hdev);
d603b76b 2129 } else if (test_and_clear_bit(HCI_CONFIG, &hdev->dev_flags)) {
5ea234d3
MH		 2130 /* When the controller is now configured, then it
2131 * is important to clear the HCI_RAW flag.
2132 */
2133 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags))
2134 clear_bit(HCI_RAW, &hdev->flags);
2135
d603b76b
MH		 2136 /* Powering on the controller with HCI_CONFIG set only
2137 * happens with the transition from unconfigured to
2138 * configured. This will send the Index Added event.
2139 */
744cf19e 2140 mgmt_index_added(hdev);
fee746b0 2141 }
ab81cbf9
JH		 2142}
2143
2144static void hci_power_off(struct work_struct *work)
2145{
3243553f 2146 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 2147 power_off.work);
ab81cbf9
JH		 2148
2149 BT_DBG("%s", hdev->name);
2150
8ee56540 2151 hci_dev_do_close(hdev);
ab81cbf9
JH		 2152}
2153
c7741d16
MH		 2154static void hci_error_reset(struct work_struct *work)
2155{
2156 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2157
2158 BT_DBG("%s", hdev->name);
2159
2160 if (hdev->hw_error)
2161 hdev->hw_error(hdev, hdev->hw_error_code);
2162 else
2163 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2164 hdev->hw_error_code);
2165
2166 if (hci_dev_do_close(hdev))
2167 return;
2168
c7741d16
MH		 2169 hci_dev_do_open(hdev);
2170}
2171
16ab91ab
JH		 2172static void hci_discov_off(struct work_struct *work)
2173{
2174 struct hci_dev *hdev;
16ab91ab
JH		 2175
2176 hdev = container_of(work, struct hci_dev, discov_off.work);
2177
2178 BT_DBG("%s", hdev->name);
2179
d1967ff8 2180 mgmt_discoverable_timeout(hdev);
16ab91ab
JH		 2181}
2182
35f7498a 2183void hci_uuids_clear(struct hci_dev *hdev)
2aeb9a1a 2184{
4821002c 2185 struct bt_uuid *uuid, *tmp;
2aeb9a1a 2186
4821002c
JH		 2187 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2188 list_del(&uuid->list);
2aeb9a1a
JH		 2189 kfree(uuid);
2190 }
2aeb9a1a
JH		 2191}
2192
35f7498a 2193void hci_link_keys_clear(struct hci_dev *hdev)
55ed8ca1 2194{
0378b597 2195 struct link_key *key;
55ed8ca1 2196
0378b597
JH		 2197 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2198 list_del_rcu(&key->list);
2199 kfree_rcu(key, rcu);
55ed8ca1 2200 }
55ed8ca1
JH		 2201}
2202
35f7498a 2203void hci_smp_ltks_clear(struct hci_dev *hdev)
b899efaf 2204{
970d0f1b 2205 struct smp_ltk *k;
b899efaf 2206
970d0f1b
JH		 2207 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2208 list_del_rcu(&k->list);
2209 kfree_rcu(k, rcu);
b899efaf 2210 }
b899efaf
VCG		 2211}
2212
970c4e46
JH		 2213void hci_smp_irks_clear(struct hci_dev *hdev)
2214{
adae20cb 2215 struct smp_irk *k;
970c4e46 2216
adae20cb
JH		 2217 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2218 list_del_rcu(&k->list);
2219 kfree_rcu(k, rcu);
970c4e46
JH		 2220 }
2221}
2222
55ed8ca1
JH		 2223struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2224{
8035ded4 2225 struct link_key *k;
55ed8ca1 2226
0378b597
JH		 2227 rcu_read_lock();
2228 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2229 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2230 rcu_read_unlock();
55ed8ca1 2231 return k;
0378b597
JH		 2232 }
2233 }
2234 rcu_read_unlock();
55ed8ca1
JH		 2235
2236 return NULL;
2237}
2238
745c0ce3 2239static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 2240 u8 key_type, u8 old_key_type)
d25e28ab
JH		 2241{
2242 /* Legacy key */
2243 if (key_type < 0x03)
745c0ce3 2244 return true;
d25e28ab
JH		 2245
2246 /* Debug keys are insecure so don't store them persistently */
2247 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 2248 return false;
d25e28ab
JH		 2249
2250 /* Changed combination key and there's no previous one */
2251 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 2252 return false;
d25e28ab
JH		 2253
2254 /* Security mode 3 case */
2255 if (!conn)
745c0ce3 2256 return true;
d25e28ab 2257
e3befab9
JH		 2258 /* BR/EDR key derived using SC from an LE link */
2259 if (conn->type == LE_LINK)
2260 return true;
2261
d25e28ab
JH		 2262 /* Neither local nor remote side had no-bonding as requirement */
2263 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 2264 return true;
d25e28ab
JH		 2265
2266 /* Local side had dedicated bonding as requirement */
2267 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 2268 return true;
d25e28ab
JH		 2269
2270 /* Remote side had dedicated bonding as requirement */
2271 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 2272 return true;
d25e28ab
JH		 2273
2274 /* If none of the above criteria match, then don't store the key
2275 * persistently */
745c0ce3 2276 return false;
d25e28ab
JH		 2277}
2278
e804d25d 2279static u8 ltk_role(u8 type)
98a0b845 2280{
e804d25d
JH		 2281 if (type == SMP_LTK)
2282 return HCI_ROLE_MASTER;
98a0b845 2283
e804d25d 2284 return HCI_ROLE_SLAVE;
98a0b845
JH		 2285}
2286
f3a73d97
JH		 2287struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2288 u8 addr_type, u8 role)
75d262c2 2289{
c9839a11 2290 struct smp_ltk *k;
75d262c2 2291
970d0f1b
JH		 2292 rcu_read_lock();
2293 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
5378bc56
JH		 2294 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2295 continue;
2296
923e2414 2297 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
970d0f1b 2298 rcu_read_unlock();
75d262c2 2299 return k;
970d0f1b
JH		 2300 }
2301 }
2302 rcu_read_unlock();
75d262c2
VCG		 2303
2304 return NULL;
2305}
75d262c2 2306
970c4e46
JH		 2307struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2308{
2309 struct smp_irk *irk;
2310
adae20cb
JH		 2311 rcu_read_lock();
2312 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2313 if (!bacmp(&irk->rpa, rpa)) {
2314 rcu_read_unlock();
970c4e46 2315 return irk;
adae20cb 2316 }
970c4e46
JH		 2317 }
2318
adae20cb 2319 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
defce9e8 2320 if (smp_irk_matches(hdev, irk->val, rpa)) {
970c4e46 2321 bacpy(&irk->rpa, rpa);
adae20cb 2322 rcu_read_unlock();
970c4e46
JH		 2323 return irk;
2324 }
2325 }
adae20cb 2326 rcu_read_unlock();
970c4e46
JH		 2327
2328 return NULL;
2329}
2330
2331struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2332 u8 addr_type)
2333{
2334 struct smp_irk *irk;
2335
6cfc9988
JH		 2336 /* Identity Address must be public or static random */
2337 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2338 return NULL;
2339
adae20cb
JH		 2340 rcu_read_lock();
2341 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
970c4e46 2342 if (addr_type == irk->addr_type &&
adae20cb
JH		 2343 bacmp(bdaddr, &irk->bdaddr) == 0) {
2344 rcu_read_unlock();
970c4e46 2345 return irk;
adae20cb 2346 }
970c4e46 2347 }
adae20cb 2348 rcu_read_unlock();
970c4e46
JH		 2349
2350 return NULL;
2351}
2352
567fa2aa 2353struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
7652ff6a
JH		 2354 bdaddr_t *bdaddr, u8 *val, u8 type,
2355 u8 pin_len, bool *persistent)
55ed8ca1
JH		 2356{
2357 struct link_key *key, *old_key;
745c0ce3 2358 u8 old_key_type;
55ed8ca1
JH		 2359
2360 old_key = hci_find_link_key(hdev, bdaddr);
2361 if (old_key) {
2362 old_key_type = old_key->type;
2363 key = old_key;
2364 } else {
12adcf3a 2365 old_key_type = conn ? conn->key_type : 0xff;
0a14ab41 2366 key = kzalloc(sizeof(*key), GFP_KERNEL);
55ed8ca1 2367 if (!key)
567fa2aa 2368 return NULL;
0378b597 2369 list_add_rcu(&key->list, &hdev->link_keys);
55ed8ca1
JH		 2370 }
2371
6ed93dc6 2372 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 2373
d25e28ab
JH		 2374 /* Some buggy controller combinations generate a changed
2375 * combination key for legacy pairing even when there's no
2376 * previous key */
2377 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 2378 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 2379 type = HCI_LK_COMBINATION;
655fe6ec
JH		 2380 if (conn)
2381 conn->key_type = type;
2382 }
d25e28ab 2383
55ed8ca1 2384 bacpy(&key->bdaddr, bdaddr);
9b3b4460 2385 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 2386 key->pin_len = pin_len;
2387
b6020ba0 2388 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 2389 key->type = old_key_type;
4748fed2
JH		 2390 else
2391 key->type = type;
2392
7652ff6a
JH		 2393 if (persistent)
2394 *persistent = hci_persistent_key(hdev, conn, type,
2395 old_key_type);
4df378a1 2396
567fa2aa 2397 return key;
55ed8ca1
JH		 2398}
2399
ca9142b8 2400struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
35d70271 2401 u8 addr_type, u8 type, u8 authenticated,
fe39c7b2 2402 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
75d262c2 2403{
c9839a11 2404 struct smp_ltk *key, *old_key;
e804d25d 2405 u8 role = ltk_role(type);
75d262c2 2406
f3a73d97 2407 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
c9839a11 2408 if (old_key)
75d262c2 2409 key = old_key;
c9839a11 2410 else {
0a14ab41 2411 key = kzalloc(sizeof(*key), GFP_KERNEL);
75d262c2 2412 if (!key)
ca9142b8 2413 return NULL;
970d0f1b 2414 list_add_rcu(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 2415 }
2416
75d262c2 2417 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 2418 key->bdaddr_type = addr_type;
2419 memcpy(key->val, tk, sizeof(key->val));
2420 key->authenticated = authenticated;
2421 key->ediv = ediv;
fe39c7b2 2422 key->rand = rand;
c9839a11
VCG		 2423 key->enc_size = enc_size;
2424 key->type = type;
75d262c2 2425
ca9142b8 2426 return key;
75d262c2
VCG		 2427}
2428
ca9142b8
JH		 2429struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2430 u8 addr_type, u8 val[16], bdaddr_t *rpa)
970c4e46
JH		 2431{
2432 struct smp_irk *irk;
2433
2434 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2435 if (!irk) {
2436 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2437 if (!irk)
ca9142b8 2438 return NULL;
970c4e46
JH		 2439
2440 bacpy(&irk->bdaddr, bdaddr);
2441 irk->addr_type = addr_type;
2442
adae20cb 2443 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
970c4e46
JH		 2444 }
2445
2446 memcpy(irk->val, val, 16);
2447 bacpy(&irk->rpa, rpa);
2448
ca9142b8 2449 return irk;
970c4e46
JH		 2450}
2451
55ed8ca1
JH		 2452int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2453{
2454 struct link_key *key;
2455
2456 key = hci_find_link_key(hdev, bdaddr);
2457 if (!key)
2458 return -ENOENT;
2459
6ed93dc6 2460 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1 2461
0378b597
JH		 2462 list_del_rcu(&key->list);
2463 kfree_rcu(key, rcu);
55ed8ca1
JH		 2464
2465 return 0;
2466}
2467
e0b2b27e 2468int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
b899efaf 2469{
970d0f1b 2470 struct smp_ltk *k;
c51ffa0b 2471 int removed = 0;
b899efaf 2472
970d0f1b 2473 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
e0b2b27e 2474 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
b899efaf
VCG		 2475 continue;
2476
6ed93dc6 2477 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf 2478
970d0f1b
JH		 2479 list_del_rcu(&k->list);
2480 kfree_rcu(k, rcu);
c51ffa0b 2481 removed++;
b899efaf
VCG		 2482 }
2483
c51ffa0b 2484 return removed ? 0 : -ENOENT;
b899efaf
VCG		 2485}
2486
a7ec7338
JH		 2487void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2488{
adae20cb 2489 struct smp_irk *k;
a7ec7338 2490
adae20cb 2491 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
a7ec7338
JH		 2492 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2493 continue;
2494
2495 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2496
adae20cb
JH		 2497 list_del_rcu(&k->list);
2498 kfree_rcu(k, rcu);
a7ec7338
JH		 2499 }
2500}
2501
6bd32326 2502/* HCI command timer function */
65cc2b49 2503static void hci_cmd_timeout(struct work_struct *work)
6bd32326 2504{
65cc2b49
MH		 2505 struct hci_dev *hdev = container_of(work, struct hci_dev,
2506 cmd_timer.work);
6bd32326 2507
bda4f23a
AE		 2508 if (hdev->sent_cmd) {
2509 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2510 u16 opcode = __le16_to_cpu(sent->opcode);
2511
2512 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2513 } else {
2514 BT_ERR("%s command tx timeout", hdev->name);
2515 }
2516
6bd32326 2517 atomic_set(&hdev->cmd_cnt, 1);
c347b765 2518 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 2519}
2520
2763eda6 2521struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
6928a924 2522 bdaddr_t *bdaddr, u8 bdaddr_type)
2763eda6
SJ		 2523{
2524 struct oob_data *data;
2525
6928a924
JH		 2526 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2527 if (bacmp(bdaddr, &data->bdaddr) != 0)
2528 continue;
2529 if (data->bdaddr_type != bdaddr_type)
2530 continue;
2531 return data;
2532 }
2763eda6
SJ		 2533
2534 return NULL;
2535}
2536
6928a924
JH		 2537int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2538 u8 bdaddr_type)
2763eda6
SJ		 2539{
2540 struct oob_data *data;
2541
6928a924 2542 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2763eda6
SJ		 2543 if (!data)
2544 return -ENOENT;
2545
6928a924 2546 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2763eda6
SJ		 2547
2548 list_del(&data->list);
2549 kfree(data);
2550
2551 return 0;
2552}
2553
35f7498a 2554void hci_remote_oob_data_clear(struct hci_dev *hdev)
2763eda6
SJ		 2555{
2556 struct oob_data *data, *n;
2557
2558 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2559 list_del(&data->list);
2560 kfree(data);
2561 }
2763eda6
SJ		 2562}
2563
0798872e 2564int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
6928a924 2565 u8 bdaddr_type, u8 *hash192, u8 *rand192,
81328d5c 2566 u8 *hash256, u8 *rand256)
2763eda6
SJ		 2567{
2568 struct oob_data *data;
2569
6928a924 2570 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2763eda6 2571 if (!data) {
0a14ab41 2572 data = kmalloc(sizeof(*data), GFP_KERNEL);
2763eda6
SJ		 2573 if (!data)
2574 return -ENOMEM;
2575
2576 bacpy(&data->bdaddr, bdaddr);
6928a924 2577 data->bdaddr_type = bdaddr_type;
2763eda6
SJ		 2578 list_add(&data->list, &hdev->remote_oob_data);
2579 }
2580
81328d5c
JH		 2581 if (hash192 && rand192) {
2582 memcpy(data->hash192, hash192, sizeof(data->hash192));
2583 memcpy(data->rand192, rand192, sizeof(data->rand192));
2584 } else {
2585 memset(data->hash192, 0, sizeof(data->hash192));
2586 memset(data->rand192, 0, sizeof(data->rand192));
0798872e
MH		 2587 }
2588
81328d5c
JH		 2589 if (hash256 && rand256) {
2590 memcpy(data->hash256, hash256, sizeof(data->hash256));
2591 memcpy(data->rand256, rand256, sizeof(data->rand256));
2592 } else {
2593 memset(data->hash256, 0, sizeof(data->hash256));
2594 memset(data->rand256, 0, sizeof(data->rand256));
2595 }
0798872e 2596
6ed93dc6 2597 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2598
2599 return 0;
2600}
2601
dcc36c16 2602struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
b9ee0a78 2603 bdaddr_t *bdaddr, u8 type)
b2a66aad 2604{
8035ded4 2605 struct bdaddr_list *b;
b2a66aad 2606
dcc36c16 2607 list_for_each_entry(b, bdaddr_list, list) {
b9ee0a78 2608 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
b2a66aad 2609 return b;
b9ee0a78 2610 }
b2a66aad
AJ		 2611
2612 return NULL;
2613}
2614
dcc36c16 2615void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
b2a66aad
AJ		 2616{
2617 struct list_head *p, *n;
2618
dcc36c16 2619 list_for_each_safe(p, n, bdaddr_list) {
b9ee0a78 2620 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
b2a66aad
AJ		 2621
2622 list_del(p);
2623 kfree(b);
2624 }
b2a66aad
AJ		 2625}
2626
dcc36c16 2627int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2628{
2629 struct bdaddr_list *entry;
b2a66aad 2630
b9ee0a78 2631 if (!bacmp(bdaddr, BDADDR_ANY))
b2a66aad
AJ		 2632 return -EBADF;
2633
dcc36c16 2634 if (hci_bdaddr_list_lookup(list, bdaddr, type))
5e762444 2635 return -EEXIST;
b2a66aad 2636
27f70f3e 2637 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
5e762444
AJ		 2638 if (!entry)
2639 return -ENOMEM;
b2a66aad
AJ		 2640
2641 bacpy(&entry->bdaddr, bdaddr);
b9ee0a78 2642 entry->bdaddr_type = type;
b2a66aad 2643
dcc36c16 2644 list_add(&entry->list, list);
b2a66aad 2645
2a8357f2 2646 return 0;
b2a66aad
AJ		 2647}
2648
dcc36c16 2649int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2650{
2651 struct bdaddr_list *entry;
b2a66aad 2652
35f7498a 2653 if (!bacmp(bdaddr, BDADDR_ANY)) {
dcc36c16 2654 hci_bdaddr_list_clear(list);
35f7498a
JH		 2655 return 0;
2656 }
b2a66aad 2657
dcc36c16 2658 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
d2ab0ac1
MH		 2659 if (!entry)
2660 return -ENOENT;
2661
2662 list_del(&entry->list);
2663 kfree(entry);
2664
2665 return 0;
2666}
2667
15819a70
AG		 2668/* This function requires the caller holds hdev->lock */
2669struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2670 bdaddr_t *addr, u8 addr_type)
2671{
2672 struct hci_conn_params *params;
2673
738f6185
JH		 2674 /* The conn params list only contains identity addresses */
2675 if (!hci_is_identity_address(addr, addr_type))
2676 return NULL;
2677
15819a70
AG		 2678 list_for_each_entry(params, &hdev->le_conn_params, list) {
2679 if (bacmp(&params->addr, addr) == 0 &&
2680 params->addr_type == addr_type) {
2681 return params;
2682 }
2683 }
2684
2685 return NULL;
2686}
2687
4b10966f 2688/* This function requires the caller holds hdev->lock */
501f8827
JH		 2689struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2690 bdaddr_t *addr, u8 addr_type)
a9b0a04c 2691{
912b42ef 2692 struct hci_conn_params *param;
a9b0a04c 2693
738f6185
JH		 2694 /* The list only contains identity addresses */
2695 if (!hci_is_identity_address(addr, addr_type))
2696 return NULL;
a9b0a04c 2697
501f8827 2698 list_for_each_entry(param, list, action) {
912b42ef
JH		 2699 if (bacmp(&param->addr, addr) == 0 &&
2700 param->addr_type == addr_type)
2701 return param;
4b10966f
MH		 2702 }
2703
2704 return NULL;
a9b0a04c
AG		 2705}
2706
15819a70 2707/* This function requires the caller holds hdev->lock */
51d167c0
MH		 2708struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2709 bdaddr_t *addr, u8 addr_type)
15819a70
AG		 2710{
2711 struct hci_conn_params *params;
2712
c46245b3 2713 if (!hci_is_identity_address(addr, addr_type))
51d167c0 2714 return NULL;
a9b0a04c 2715
15819a70 2716 params = hci_conn_params_lookup(hdev, addr, addr_type);
cef952ce 2717 if (params)
51d167c0 2718 return params;
15819a70
AG		 2719
2720 params = kzalloc(sizeof(*params), GFP_KERNEL);
2721 if (!params) {
2722 BT_ERR("Out of memory");
51d167c0 2723 return NULL;
15819a70
AG		 2724 }
2725
2726 bacpy(&params->addr, addr);
2727 params->addr_type = addr_type;
cef952ce
AG		 2728
2729 list_add(&params->list, &hdev->le_conn_params);
93450c75 2730 INIT_LIST_HEAD(&params->action);
cef952ce 2731
bf5b3c8b
MH		 2732 params->conn_min_interval = hdev->le_conn_min_interval;
2733 params->conn_max_interval = hdev->le_conn_max_interval;
2734 params->conn_latency = hdev->le_conn_latency;
2735 params->supervision_timeout = hdev->le_supv_timeout;
2736 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2737
2738 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2739
51d167c0 2740 return params;
bf5b3c8b
MH		 2741}
2742
f6c63249 2743static void hci_conn_params_free(struct hci_conn_params *params)
15819a70 2744{
f8aaf9b6 2745 if (params->conn) {
f161dd41 2746 hci_conn_drop(params->conn);
f8aaf9b6
JH		 2747 hci_conn_put(params->conn);
2748 }
f161dd41 2749
95305baa 2750 list_del(&params->action);
15819a70
AG		 2751 list_del(&params->list);
2752 kfree(params);
f6c63249
JH		 2753}
2754
2755/* This function requires the caller holds hdev->lock */
2756void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2757{
2758 struct hci_conn_params *params;
2759
2760 params = hci_conn_params_lookup(hdev, addr, addr_type);
2761 if (!params)
2762 return;
2763
2764 hci_conn_params_free(params);
15819a70 2765
95305baa
JH		 2766 hci_update_background_scan(hdev);
2767
15819a70
AG		 2768 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2769}
2770
2771/* This function requires the caller holds hdev->lock */
55af49a8 2772void hci_conn_params_clear_disabled(struct hci_dev *hdev)
15819a70
AG		 2773{
2774 struct hci_conn_params *params, *tmp;
2775
2776 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
55af49a8
JH		 2777 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2778 continue;
15819a70
AG		 2779 list_del(&params->list);
2780 kfree(params);
2781 }
2782
55af49a8 2783 BT_DBG("All LE disabled connection parameters were removed");
77a77a30
AG		 2784}
2785
2786/* This function requires the caller holds hdev->lock */
373110c5 2787void hci_conn_params_clear_all(struct hci_dev *hdev)
77a77a30 2788{
15819a70 2789 struct hci_conn_params *params, *tmp;
77a77a30 2790
f6c63249
JH		 2791 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2792 hci_conn_params_free(params);
77a77a30 2793
a4790dbd 2794 hci_update_background_scan(hdev);
77a77a30 2795
15819a70 2796 BT_DBG("All LE connection parameters were removed");
77a77a30
AG		 2797}
2798
1904a853 2799static void inquiry_complete(struct hci_dev *hdev, u8 status, u16 opcode)
7ba8b4be 2800{
4c87eaab
AG		 2801 if (status) {
2802 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 2803
4c87eaab
AG		 2804 hci_dev_lock(hdev);
2805 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2806 hci_dev_unlock(hdev);
2807 return;
2808 }
7ba8b4be
AG		 2809}
2810
1904a853
MH		 2811static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
2812 u16 opcode)
7ba8b4be 2813{
4c87eaab
AG		 2814 /* General inquiry access code (GIAC) */
2815 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2816 struct hci_request req;
2817 struct hci_cp_inquiry cp;
7ba8b4be
AG		 2818 int err;
2819
4c87eaab
AG		 2820 if (status) {
2821 BT_ERR("Failed to disable LE scanning: status %d", status);
2822 return;
2823 }
7ba8b4be 2824
4c87eaab
AG		 2825 switch (hdev->discovery.type) {
2826 case DISCOV_TYPE_LE:
2827 hci_dev_lock(hdev);
2828 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2829 hci_dev_unlock(hdev);
2830 break;
7ba8b4be 2831
4c87eaab
AG		 2832 case DISCOV_TYPE_INTERLEAVED:
2833 hci_req_init(&req, hdev);
7ba8b4be 2834
4c87eaab
AG		 2835 memset(&cp, 0, sizeof(cp));
2836 memcpy(&cp.lap, lap, sizeof(cp.lap));
2837 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2838 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 2839
4c87eaab 2840 hci_dev_lock(hdev);
7dbfac1d 2841
4c87eaab 2842 hci_inquiry_cache_flush(hdev);
7dbfac1d 2843
4c87eaab
AG		 2844 err = hci_req_run(&req, inquiry_complete);
2845 if (err) {
2846 BT_ERR("Inquiry request failed: err %d", err);
2847 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2848 }
7dbfac1d 2849
4c87eaab
AG		 2850 hci_dev_unlock(hdev);
2851 break;
7dbfac1d 2852 }
7dbfac1d
AG		 2853}
2854
7ba8b4be
AG		 2855static void le_scan_disable_work(struct work_struct *work)
2856{
2857 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2858 le_scan_disable.work);
4c87eaab
AG		 2859 struct hci_request req;
2860 int err;
7ba8b4be
AG		 2861
2862 BT_DBG("%s", hdev->name);
2863
4c87eaab 2864 hci_req_init(&req, hdev);
28b75a89 2865
b1efcc28 2866 hci_req_add_le_scan_disable(&req);
28b75a89 2867
4c87eaab
AG		 2868 err = hci_req_run(&req, le_scan_disable_work_complete);
2869 if (err)
2870 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 2871}
2872
a1f4c318
JH		 2873/* Copy the Identity Address of the controller.
2874 *
2875 * If the controller has a public BD_ADDR, then by default use that one.
2876 * If this is a LE only controller without a public address, default to
2877 * the static random address.
2878 *
2879 * For debugging purposes it is possible to force controllers with a
2880 * public address to use the static random address instead.
50b5b952
MH		 2881 *
2882 * In case BR/EDR has been disabled on a dual-mode controller and
2883 * userspace has configured a static address, then that address
2884 * becomes the identity address instead of the public BR/EDR address.
a1f4c318
JH		 2885 */
2886void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2887 u8 *bdaddr_type)
2888{
111902f7 2889 if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags) ||
50b5b952
MH		 2890 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2891 (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags) &&
2892 bacmp(&hdev->static_addr, BDADDR_ANY))) {
a1f4c318
JH		 2893 bacpy(bdaddr, &hdev->static_addr);
2894 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2895 } else {
2896 bacpy(bdaddr, &hdev->bdaddr);
2897 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2898 }
2899}
2900
9be0dab7
DH		 2901/* Alloc HCI device */
2902struct hci_dev *hci_alloc_dev(void)
2903{
2904 struct hci_dev *hdev;
2905
27f70f3e 2906 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
9be0dab7
DH		 2907 if (!hdev)
2908 return NULL;
2909
b1b813d4
DH		 2910 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2911 hdev->esco_type = (ESCO_HV1);
2912 hdev->link_mode = (HCI_LM_ACCEPT);
b4cb9fb2
MH		 2913 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2914 hdev->io_capability = 0x03; /* No Input No Output */
96c2103a 2915 hdev->manufacturer = 0xffff; /* Default to internal use */
bbaf444a
JH		 2916 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2917 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2918
b1b813d4
DH		 2919 hdev->sniff_max_interval = 800;
2920 hdev->sniff_min_interval = 80;
2921
3f959d46 2922 hdev->le_adv_channel_map = 0x07;
628531c9
GL		 2923 hdev->le_adv_min_interval = 0x0800;
2924 hdev->le_adv_max_interval = 0x0800;
bef64738
MH		 2925 hdev->le_scan_interval = 0x0060;
2926 hdev->le_scan_window = 0x0030;
4e70c7e7
MH		 2927 hdev->le_conn_min_interval = 0x0028;
2928 hdev->le_conn_max_interval = 0x0038;
04fb7d90
MH		 2929 hdev->le_conn_latency = 0x0000;
2930 hdev->le_supv_timeout = 0x002a;
a8e1bfaa
MH		 2931 hdev->le_def_tx_len = 0x001b;
2932 hdev->le_def_tx_time = 0x0148;
2933 hdev->le_max_tx_len = 0x001b;
2934 hdev->le_max_tx_time = 0x0148;
2935 hdev->le_max_rx_len = 0x001b;
2936 hdev->le_max_rx_time = 0x0148;
bef64738 2937
d6bfd59c 2938 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
b9a7a61e 2939 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
31ad1691
AK		 2940 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2941 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
d6bfd59c 2942
b1b813d4
DH		 2943 mutex_init(&hdev->lock);
2944 mutex_init(&hdev->req_lock);
2945
2946 INIT_LIST_HEAD(&hdev->mgmt_pending);
2947 INIT_LIST_HEAD(&hdev->blacklist);
6659358e 2948 INIT_LIST_HEAD(&hdev->whitelist);
b1b813d4
DH		 2949 INIT_LIST_HEAD(&hdev->uuids);
2950 INIT_LIST_HEAD(&hdev->link_keys);
2951 INIT_LIST_HEAD(&hdev->long_term_keys);
970c4e46 2952 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
b1b813d4 2953 INIT_LIST_HEAD(&hdev->remote_oob_data);
d2ab0ac1 2954 INIT_LIST_HEAD(&hdev->le_white_list);
15819a70 2955 INIT_LIST_HEAD(&hdev->le_conn_params);
77a77a30 2956 INIT_LIST_HEAD(&hdev->pend_le_conns);
66f8455a 2957 INIT_LIST_HEAD(&hdev->pend_le_reports);
6b536b5e 2958 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2959
2960 INIT_WORK(&hdev->rx_work, hci_rx_work);
2961 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2962 INIT_WORK(&hdev->tx_work, hci_tx_work);
2963 INIT_WORK(&hdev->power_on, hci_power_on);
c7741d16 2964 INIT_WORK(&hdev->error_reset, hci_error_reset);
b1b813d4 2965
b1b813d4
DH		 2966 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2967 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2968 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2969
b1b813d4
DH		 2970 skb_queue_head_init(&hdev->rx_q);
2971 skb_queue_head_init(&hdev->cmd_q);
2972 skb_queue_head_init(&hdev->raw_q);
2973
2974 init_waitqueue_head(&hdev->req_wait_q);
2975
65cc2b49 2976 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
b1b813d4 2977
b1b813d4
DH		 2978 hci_init_sysfs(hdev);
2979 discovery_init(hdev);
9be0dab7
DH		 2980
2981 return hdev;
2982}
2983EXPORT_SYMBOL(hci_alloc_dev);
2984
2985/* Free HCI device */
2986void hci_free_dev(struct hci_dev *hdev)
2987{
9be0dab7
DH		 2988 /* will free via device release */
2989 put_device(&hdev->dev);
2990}
2991EXPORT_SYMBOL(hci_free_dev);
2992
1da177e4
LT		 2993/* Register HCI device */
2994int hci_register_dev(struct hci_dev *hdev)
2995{
b1b813d4 2996 int id, error;
1da177e4 2997
74292d5a 2998 if (!hdev->open || !hdev->close || !hdev->send)
1da177e4
LT		 2999 return -EINVAL;
3000
08add513
MM		 3001 /* Do not allow HCI_AMP devices to register at index 0,
3002 * so the index can be used as the AMP controller ID.
3003 */
3df92b31
SL		 3004 switch (hdev->dev_type) {
3005 case HCI_BREDR:
3006 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3007 break;
3008 case HCI_AMP:
3009 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3010 break;
3011 default:
3012 return -EINVAL;
1da177e4 3013 }
8e87d142 3014
3df92b31
SL		 3015 if (id < 0)
3016 return id;
3017
1da177e4
LT		 3018 sprintf(hdev->name, "hci%d", id);
3019 hdev->id = id;
2d8b3a11
AE		 3020
3021 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3022
d8537548
KC		 3023 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3024 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 3025 if (!hdev->workqueue) {
3026 error = -ENOMEM;
3027 goto err;
3028 }
f48fd9c8 3029
d8537548
KC		 3030 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3031 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 3032 if (!hdev->req_workqueue) {
3033 destroy_workqueue(hdev->workqueue);
3034 error = -ENOMEM;
3035 goto err;
3036 }
3037
0153e2ec
MH		 3038 if (!IS_ERR_OR_NULL(bt_debugfs))
3039 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3040
bdc3e0f1
MH		 3041 dev_set_name(&hdev->dev, "%s", hdev->name);
3042
3043 error = device_add(&hdev->dev);
33ca954d 3044 if (error < 0)
54506918 3045 goto err_wqueue;
1da177e4 3046
611b30f7 3047 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 3048 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3049 hdev);
611b30f7
MH		 3050 if (hdev->rfkill) {
3051 if (rfkill_register(hdev->rfkill) < 0) {
3052 rfkill_destroy(hdev->rfkill);
3053 hdev->rfkill = NULL;
3054 }
3055 }
3056
5e130367
JH		 3057 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3058 set_bit(HCI_RFKILLED, &hdev->dev_flags);
3059
a8b2d5c2 3060 set_bit(HCI_SETUP, &hdev->dev_flags);
004b0258 3061 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ce2be9ac 3062
01cd3404 3063 if (hdev->dev_type == HCI_BREDR) {
56f87901
JH		 3064 /* Assume BR/EDR support until proven otherwise (such as
3065 * through reading supported features during init.
3066 */
3067 set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
3068 }
ce2be9ac 3069
fcee3377
GP		 3070 write_lock(&hci_dev_list_lock);
3071 list_add(&hdev->list, &hci_dev_list);
3072 write_unlock(&hci_dev_list_lock);
3073
4a964404
MH		 3074 /* Devices that are marked for raw-only usage are unconfigured
3075 * and should not be included in normal operation.
fee746b0
MH		 3076 */
3077 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
4a964404 3078 set_bit(HCI_UNCONFIGURED, &hdev->dev_flags);
fee746b0 3079
1da177e4 3080 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 3081 hci_dev_hold(hdev);
1da177e4 3082
19202573 3083 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 3084
1da177e4 3085 return id;
f48fd9c8 3086
33ca954d
DH		 3087err_wqueue:
3088 destroy_workqueue(hdev->workqueue);
6ead1bbc 3089 destroy_workqueue(hdev->req_workqueue);
33ca954d 3090err:
3df92b31 3091 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 3092
33ca954d 3093 return error;
1da177e4
LT		 3094}
3095EXPORT_SYMBOL(hci_register_dev);
3096
3097/* Unregister HCI device */
59735631 3098void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 3099{
3df92b31 3100 int i, id;
ef222013 3101
c13854ce 3102 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 3103
94324962
JH		 3104 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
3105
3df92b31
SL		 3106 id = hdev->id;
3107
f20d09d5 3108 write_lock(&hci_dev_list_lock);
1da177e4 3109 list_del(&hdev->list);
f20d09d5 3110 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 3111
3112 hci_dev_do_close(hdev);
3113
cd4c5391 3114 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 3115 kfree_skb(hdev->reassembly[i]);
3116
b9b5ef18
GP		 3117 cancel_work_sync(&hdev->power_on);
3118
ab81cbf9 3119 if (!test_bit(HCI_INIT, &hdev->flags) &&
d603b76b
MH		 3120 !test_bit(HCI_SETUP, &hdev->dev_flags) &&
3121 !test_bit(HCI_CONFIG, &hdev->dev_flags)) {
09fd0de5 3122 hci_dev_lock(hdev);
744cf19e 3123 mgmt_index_removed(hdev);
09fd0de5 3124 hci_dev_unlock(hdev);
56e5cb86 3125 }
ab81cbf9 3126
2e58ef3e
JH		 3127 /* mgmt_index_removed should take care of emptying the
3128 * pending list */
3129 BUG_ON(!list_empty(&hdev->mgmt_pending));
3130
1da177e4
LT		 3131 hci_notify(hdev, HCI_DEV_UNREG);
3132
611b30f7
MH		 3133 if (hdev->rfkill) {
3134 rfkill_unregister(hdev->rfkill);
3135 rfkill_destroy(hdev->rfkill);
3136 }
3137
bdc3e0f1 3138 device_del(&hdev->dev);
147e2d59 3139
0153e2ec
MH		 3140 debugfs_remove_recursive(hdev->debugfs);
3141
f48fd9c8 3142 destroy_workqueue(hdev->workqueue);
6ead1bbc 3143 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 3144
09fd0de5 3145 hci_dev_lock(hdev);
dcc36c16 3146 hci_bdaddr_list_clear(&hdev->blacklist);
6659358e 3147 hci_bdaddr_list_clear(&hdev->whitelist);
2aeb9a1a 3148 hci_uuids_clear(hdev);
55ed8ca1 3149 hci_link_keys_clear(hdev);
b899efaf 3150 hci_smp_ltks_clear(hdev);
970c4e46 3151 hci_smp_irks_clear(hdev);
2763eda6 3152 hci_remote_oob_data_clear(hdev);
dcc36c16 3153 hci_bdaddr_list_clear(&hdev->le_white_list);
373110c5 3154 hci_conn_params_clear_all(hdev);
22078800 3155 hci_discovery_filter_clear(hdev);
09fd0de5 3156 hci_dev_unlock(hdev);
e2e0cacb 3157
dc946bd8 3158 hci_dev_put(hdev);
3df92b31
SL		 3159
3160 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 3161}
3162EXPORT_SYMBOL(hci_unregister_dev);
3163
3164/* Suspend HCI device */
3165int hci_suspend_dev(struct hci_dev *hdev)
3166{
3167 hci_notify(hdev, HCI_DEV_SUSPEND);
3168 return 0;
3169}
3170EXPORT_SYMBOL(hci_suspend_dev);
3171
3172/* Resume HCI device */
3173int hci_resume_dev(struct hci_dev *hdev)
3174{
3175 hci_notify(hdev, HCI_DEV_RESUME);
3176 return 0;
3177}
3178EXPORT_SYMBOL(hci_resume_dev);
3179
75e0569f
MH		 3180/* Reset HCI device */
3181int hci_reset_dev(struct hci_dev *hdev)
3182{
3183 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3184 struct sk_buff *skb;
3185
3186 skb = bt_skb_alloc(3, GFP_ATOMIC);
3187 if (!skb)
3188 return -ENOMEM;
3189
3190 bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
3191 memcpy(skb_put(skb, 3), hw_err, 3);
3192
3193 /* Send Hardware Error to upper stack */
3194 return hci_recv_frame(hdev, skb);
3195}
3196EXPORT_SYMBOL(hci_reset_dev);
3197
76bca880 3198/* Receive frame from HCI drivers */
e1a26170 3199int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 3200{
76bca880 3201 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 3202 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 3203 kfree_skb(skb);
3204 return -ENXIO;
3205 }
3206
d82603c6 3207 /* Incoming skb */
76bca880
MH		 3208 bt_cb(skb)->incoming = 1;
3209
3210 /* Time stamp */
3211 __net_timestamp(skb);
3212
76bca880 3213 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 3214 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 3215
76bca880
MH		 3216 return 0;
3217}
3218EXPORT_SYMBOL(hci_recv_frame);
3219
33e882a5 3220static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 3221 int count, __u8 index)
33e882a5
SS		 3222{
3223 int len = 0;
3224 int hlen = 0;
3225 int remain = count;
3226 struct sk_buff *skb;
3227 struct bt_skb_cb *scb;
3228
3229 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 3230 index >= NUM_REASSEMBLY)
33e882a5
SS		 3231 return -EILSEQ;
3232
3233 skb = hdev->reassembly[index];
3234
3235 if (!skb) {
3236 switch (type) {
3237 case HCI_ACLDATA_PKT:
3238 len = HCI_MAX_FRAME_SIZE;
3239 hlen = HCI_ACL_HDR_SIZE;
3240 break;
3241 case HCI_EVENT_PKT:
3242 len = HCI_MAX_EVENT_SIZE;
3243 hlen = HCI_EVENT_HDR_SIZE;
3244 break;
3245 case HCI_SCODATA_PKT:
3246 len = HCI_MAX_SCO_SIZE;
3247 hlen = HCI_SCO_HDR_SIZE;
3248 break;
3249 }
3250
1e429f38 3251 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 3252 if (!skb)
3253 return -ENOMEM;
3254
3255 scb = (void *) skb->cb;
3256 scb->expect = hlen;
3257 scb->pkt_type = type;
3258
33e882a5
SS		 3259 hdev->reassembly[index] = skb;
3260 }
3261
3262 while (count) {
3263 scb = (void *) skb->cb;
89bb46d0 3264 len = min_t(uint, scb->expect, count);
33e882a5
SS		 3265
3266 memcpy(skb_put(skb, len), data, len);
3267
3268 count -= len;
3269 data += len;
3270 scb->expect -= len;
3271 remain = count;
3272
3273 switch (type) {
3274 case HCI_EVENT_PKT:
3275 if (skb->len == HCI_EVENT_HDR_SIZE) {
3276 struct hci_event_hdr *h = hci_event_hdr(skb);
3277 scb->expect = h->plen;
3278
3279 if (skb_tailroom(skb) < scb->expect) {
3280 kfree_skb(skb);
3281 hdev->reassembly[index] = NULL;
3282 return -ENOMEM;
3283 }
3284 }
3285 break;
3286
3287 case HCI_ACLDATA_PKT:
3288 if (skb->len == HCI_ACL_HDR_SIZE) {
3289 struct hci_acl_hdr *h = hci_acl_hdr(skb);
3290 scb->expect = __le16_to_cpu(h->dlen);
3291
3292 if (skb_tailroom(skb) < scb->expect) {
3293 kfree_skb(skb);
3294 hdev->reassembly[index] = NULL;
3295 return -ENOMEM;
3296 }
3297 }
3298 break;
3299
3300 case HCI_SCODATA_PKT:
3301 if (skb->len == HCI_SCO_HDR_SIZE) {
3302 struct hci_sco_hdr *h = hci_sco_hdr(skb);
3303 scb->expect = h->dlen;
3304
3305 if (skb_tailroom(skb) < scb->expect) {
3306 kfree_skb(skb);
3307 hdev->reassembly[index] = NULL;
3308 return -ENOMEM;
3309 }
3310 }
3311 break;
3312 }
3313
3314 if (scb->expect == 0) {
3315 /* Complete frame */
3316
3317 bt_cb(skb)->pkt_type = type;
e1a26170 3318 hci_recv_frame(hdev, skb);
33e882a5
SS		 3319
3320 hdev->reassembly[index] = NULL;
3321 return remain;
3322 }
3323 }
3324
3325 return remain;
3326}
3327
99811510
SS		 3328#define STREAM_REASSEMBLY 0
3329
3330int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
3331{
3332 int type;
3333 int rem = 0;
3334
da5f6c37 3335 while (count) {
99811510
SS		 3336 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
3337
3338 if (!skb) {
3339 struct { char type; } *pkt;
3340
3341 /* Start of the frame */
3342 pkt = data;
3343 type = pkt->type;
3344
3345 data++;
3346 count--;
3347 } else
3348 type = bt_cb(skb)->pkt_type;
3349
1e429f38 3350 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 3351 STREAM_REASSEMBLY);
99811510
SS		 3352 if (rem < 0)
3353 return rem;
3354
3355 data += (count - rem);
3356 count = rem;
f81c6224 3357 }
99811510
SS		 3358
3359 return rem;
3360}
3361EXPORT_SYMBOL(hci_recv_stream_fragment);
3362
1da177e4
LT		 3363/* ---- Interface to upper protocols ---- */
3364
1da177e4
LT		 3365int hci_register_cb(struct hci_cb *cb)
3366{
3367 BT_DBG("%p name %s", cb, cb->name);
3368
f20d09d5 3369 write_lock(&hci_cb_list_lock);
1da177e4 3370 list_add(&cb->list, &hci_cb_list);
f20d09d5 3371 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 3372
3373 return 0;
3374}
3375EXPORT_SYMBOL(hci_register_cb);
3376
3377int hci_unregister_cb(struct hci_cb *cb)
3378{
3379 BT_DBG("%p name %s", cb, cb->name);
3380
f20d09d5 3381 write_lock(&hci_cb_list_lock);
1da177e4 3382 list_del(&cb->list);
f20d09d5 3383 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 3384
3385 return 0;
3386}
3387EXPORT_SYMBOL(hci_unregister_cb);
3388
51086991 3389static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 3390{
cdc52faa
MH		 3391 int err;
3392
0d48d939 3393 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 3394
cd82e61c
MH		 3395 /* Time stamp */
3396 __net_timestamp(skb);
1da177e4 3397
cd82e61c
MH		 3398 /* Send copy to monitor */
3399 hci_send_to_monitor(hdev, skb);
3400
3401 if (atomic_read(&hdev->promisc)) {
3402 /* Send copy to the sockets */
470fe1b5 3403 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3404 }
3405
3406 /* Get rid of skb owner, prior to sending to the driver. */
3407 skb_orphan(skb);
3408
cdc52faa
MH		 3409 err = hdev->send(hdev, skb);
3410 if (err < 0) {
3411 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3412 kfree_skb(skb);
3413 }
1da177e4
LT		 3414}
3415
899de765
MH		 3416bool hci_req_pending(struct hci_dev *hdev)
3417{
3418 return (hdev->req_status == HCI_REQ_PEND);
3419}
3420
1ca3a9d0 3421/* Send HCI command */
07dc93dd
JH		 3422int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3423 const void *param)
1ca3a9d0
JH		 3424{
3425 struct sk_buff *skb;
3426
3427 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3428
3429 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3430 if (!skb) {
3431 BT_ERR("%s no memory for command", hdev->name);
3432 return -ENOMEM;
3433 }
3434
49c922bb 3435 /* Stand-alone HCI commands must be flagged as
11714b3d
JH		 3436 * single-command requests.
3437 */
3438 bt_cb(skb)->req.start = true;
3439
1da177e4 3440 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 3441 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3442
3443 return 0;
3444}
1da177e4
LT		 3445
3446/* Get data from the previously sent command */
a9de9248 3447void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 3448{
3449 struct hci_command_hdr *hdr;
3450
3451 if (!hdev->sent_cmd)
3452 return NULL;
3453
3454 hdr = (void *) hdev->sent_cmd->data;
3455
a9de9248 3456 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 3457 return NULL;
3458
f0e09510 3459 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 3460
3461 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3462}
3463
3464/* Send ACL data */
3465static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3466{
3467 struct hci_acl_hdr *hdr;
3468 int len = skb->len;
3469
badff6d0
ACM		 3470 skb_push(skb, HCI_ACL_HDR_SIZE);
3471 skb_reset_transport_header(skb);
9c70220b 3472 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 3473 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3474 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 3475}
3476
ee22be7e 3477static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 3478 struct sk_buff *skb, __u16 flags)
1da177e4 3479{
ee22be7e 3480 struct hci_conn *conn = chan->conn;
1da177e4
LT		 3481 struct hci_dev *hdev = conn->hdev;
3482 struct sk_buff *list;
3483
087bfd99
GP		 3484 skb->len = skb_headlen(skb);
3485 skb->data_len = 0;
3486
3487 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 3488
3489 switch (hdev->dev_type) {
3490 case HCI_BREDR:
3491 hci_add_acl_hdr(skb, conn->handle, flags);
3492 break;
3493 case HCI_AMP:
3494 hci_add_acl_hdr(skb, chan->handle, flags);
3495 break;
3496 default:
3497 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3498 return;
3499 }
087bfd99 3500
70f23020
AE		 3501 list = skb_shinfo(skb)->frag_list;
3502 if (!list) {
1da177e4
LT		 3503 /* Non fragmented */
3504 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3505
73d80deb 3506 skb_queue_tail(queue, skb);
1da177e4
LT		 3507 } else {
3508 /* Fragmented */
3509 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3510
3511 skb_shinfo(skb)->frag_list = NULL;
3512
9cfd5a23
JR		 3513 /* Queue all fragments atomically. We need to use spin_lock_bh
3514 * here because of 6LoWPAN links, as there this function is
3515 * called from softirq and using normal spin lock could cause
3516 * deadlocks.
3517 */
3518 spin_lock_bh(&queue->lock);
1da177e4 3519
73d80deb 3520 __skb_queue_tail(queue, skb);
e702112f
AE		 3521
3522 flags &= ~ACL_START;
3523 flags |= ACL_CONT;
1da177e4
LT		 3524 do {
3525 skb = list; list = list->next;
8e87d142 3526
0d48d939 3527 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 3528 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 3529
3530 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3531
73d80deb 3532 __skb_queue_tail(queue, skb);
1da177e4
LT		 3533 } while (list);
3534
9cfd5a23 3535 spin_unlock_bh(&queue->lock);
1da177e4 3536 }
73d80deb
LAD		 3537}
3538
3539void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3540{
ee22be7e 3541 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 3542
f0e09510 3543 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 3544
ee22be7e 3545 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 3546
3eff45ea 3547 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 3548}
1da177e4
LT		 3549
3550/* Send SCO data */
0d861d8b 3551void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 3552{
3553 struct hci_dev *hdev = conn->hdev;
3554 struct hci_sco_hdr hdr;
3555
3556 BT_DBG("%s len %d", hdev->name, skb->len);
3557
aca3192c 3558 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 3559 hdr.dlen = skb->len;
3560
badff6d0
ACM		 3561 skb_push(skb, HCI_SCO_HDR_SIZE);
3562 skb_reset_transport_header(skb);
9c70220b 3563 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 3564
0d48d939 3565 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 3566
1da177e4 3567 skb_queue_tail(&conn->data_q, skb);
3eff45ea 3568 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 3569}
1da177e4
LT		 3570
3571/* ---- HCI TX task (outgoing data) ---- */
3572
3573/* HCI Connection scheduler */
6039aa73
GP		 3574static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3575 int *quote)
1da177e4
LT		 3576{
3577 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3578 struct hci_conn *conn = NULL, *c;
abc5de8f 3579 unsigned int num = 0, min = ~0;
1da177e4 3580
8e87d142 3581 /* We don't have to lock device here. Connections are always
1da177e4 3582 * added and removed with TX task disabled. */
bf4c6325
GP		 3583
3584 rcu_read_lock();
3585
3586 list_for_each_entry_rcu(c, &h->list, list) {
769be974 3587 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 3588 continue;
769be974
MH		 3589
3590 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3591 continue;
3592
1da177e4
LT		 3593 num++;
3594
3595 if (c->sent < min) {
3596 min = c->sent;
3597 conn = c;
3598 }
52087a79
LAD		 3599
3600 if (hci_conn_num(hdev, type) == num)
3601 break;
1da177e4
LT		 3602 }
3603
bf4c6325
GP		 3604 rcu_read_unlock();
3605
1da177e4 3606 if (conn) {
6ed58ec5
VT		 3607 int cnt, q;
3608
3609 switch (conn->type) {
3610 case ACL_LINK:
3611 cnt = hdev->acl_cnt;
3612 break;
3613 case SCO_LINK:
3614 case ESCO_LINK:
3615 cnt = hdev->sco_cnt;
3616 break;
3617 case LE_LINK:
3618 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3619 break;
3620 default:
3621 cnt = 0;
3622 BT_ERR("Unknown link type");
3623 }
3624
3625 q = cnt / num;
1da177e4
LT		 3626 *quote = q ? q : 1;
3627 } else
3628 *quote = 0;
3629
3630 BT_DBG("conn %p quote %d", conn, *quote);
3631 return conn;
3632}
3633
6039aa73 3634static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 3635{
3636 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3637 struct hci_conn *c;
1da177e4 3638
bae1f5d9 3639 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 3640
bf4c6325
GP		 3641 rcu_read_lock();
3642
1da177e4 3643 /* Kill stalled connections */
bf4c6325 3644 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 3645 if (c->type == type && c->sent) {
6ed93dc6
AE		 3646 BT_ERR("%s killing stalled connection %pMR",
3647 hdev->name, &c->dst);
bed71748 3648 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 3649 }
3650 }
bf4c6325
GP		 3651
3652 rcu_read_unlock();
1da177e4
LT		 3653}
3654
6039aa73
GP		 3655static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3656 int *quote)
1da177e4 3657{
73d80deb
LAD		 3658 struct hci_conn_hash *h = &hdev->conn_hash;
3659 struct hci_chan *chan = NULL;
abc5de8f 3660 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 3661 struct hci_conn *conn;
73d80deb
LAD		 3662 int cnt, q, conn_num = 0;
3663
3664 BT_DBG("%s", hdev->name);
3665
bf4c6325
GP		 3666 rcu_read_lock();
3667
3668 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 3669 struct hci_chan *tmp;
3670
3671 if (conn->type != type)
3672 continue;
3673
3674 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3675 continue;
3676
3677 conn_num++;
3678
8192edef 3679 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 3680 struct sk_buff *skb;
3681
3682 if (skb_queue_empty(&tmp->data_q))
3683 continue;
3684
3685 skb = skb_peek(&tmp->data_q);
3686 if (skb->priority < cur_prio)
3687 continue;
3688
3689 if (skb->priority > cur_prio) {
3690 num = 0;
3691 min = ~0;
3692 cur_prio = skb->priority;
3693 }
3694
3695 num++;
3696
3697 if (conn->sent < min) {
3698 min = conn->sent;
3699 chan = tmp;
3700 }
3701 }
3702
3703 if (hci_conn_num(hdev, type) == conn_num)
3704 break;
3705 }
3706
bf4c6325
GP		 3707 rcu_read_unlock();
3708
73d80deb
LAD		 3709 if (!chan)
3710 return NULL;
3711
3712 switch (chan->conn->type) {
3713 case ACL_LINK:
3714 cnt = hdev->acl_cnt;
3715 break;
bd1eb66b
AE		 3716 case AMP_LINK:
3717 cnt = hdev->block_cnt;
3718 break;
73d80deb
LAD		 3719 case SCO_LINK:
3720 case ESCO_LINK:
3721 cnt = hdev->sco_cnt;
3722 break;
3723 case LE_LINK:
3724 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3725 break;
3726 default:
3727 cnt = 0;
3728 BT_ERR("Unknown link type");
3729 }
3730
3731 q = cnt / num;
3732 *quote = q ? q : 1;
3733 BT_DBG("chan %p quote %d", chan, *quote);
3734 return chan;
3735}
3736
02b20f0b
LAD		 3737static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3738{
3739 struct hci_conn_hash *h = &hdev->conn_hash;
3740 struct hci_conn *conn;
3741 int num = 0;
3742
3743 BT_DBG("%s", hdev->name);
3744
bf4c6325
GP		 3745 rcu_read_lock();
3746
3747 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3748 struct hci_chan *chan;
3749
3750 if (conn->type != type)
3751 continue;
3752
3753 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3754 continue;
3755
3756 num++;
3757
8192edef 3758 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3759 struct sk_buff *skb;
3760
3761 if (chan->sent) {
3762 chan->sent = 0;
3763 continue;
3764 }
3765
3766 if (skb_queue_empty(&chan->data_q))
3767 continue;
3768
3769 skb = skb_peek(&chan->data_q);
3770 if (skb->priority >= HCI_PRIO_MAX - 1)
3771 continue;
3772
3773 skb->priority = HCI_PRIO_MAX - 1;
3774
3775 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3776 skb->priority);
02b20f0b
LAD		 3777 }
3778
3779 if (hci_conn_num(hdev, type) == num)
3780 break;
3781 }
bf4c6325
GP		 3782
3783 rcu_read_unlock();
3784
02b20f0b
LAD		 3785}
3786
b71d385a
AE		 3787static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3788{
3789 /* Calculate count of blocks used by this packet */
3790 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3791}
3792
6039aa73 3793static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3794{
4a964404 3795 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
1da177e4
LT		 3796 /* ACL tx timeout must be longer than maximum
3797 * link supervision timeout (40.9 seconds) */
63d2bc1b 3798 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3799 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3800 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3801 }
63d2bc1b 3802}
1da177e4 3803
6039aa73 3804static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3805{
3806 unsigned int cnt = hdev->acl_cnt;
3807 struct hci_chan *chan;
3808 struct sk_buff *skb;
3809 int quote;
3810
3811 __check_timeout(hdev, cnt);
04837f64 3812
73d80deb 3813 while (hdev->acl_cnt &&
a8c5fb1a 3814 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3815 u32 priority = (skb_peek(&chan->data_q))->priority;
3816 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3817 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3818 skb->len, skb->priority);
73d80deb 3819
ec1cce24
LAD		 3820 /* Stop if priority has changed */
3821 if (skb->priority < priority)
3822 break;
3823
3824 skb = skb_dequeue(&chan->data_q);
3825
73d80deb 3826 hci_conn_enter_active_mode(chan->conn,
04124681 3827 bt_cb(skb)->force_active);
04837f64 3828
57d17d70 3829 hci_send_frame(hdev, skb);
1da177e4
LT		 3830 hdev->acl_last_tx = jiffies;
3831
3832 hdev->acl_cnt--;
73d80deb
LAD		 3833 chan->sent++;
3834 chan->conn->sent++;
1da177e4
LT		 3835 }
3836 }
02b20f0b
LAD		 3837
3838 if (cnt != hdev->acl_cnt)
3839 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3840}
3841
6039aa73 3842static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3843{
63d2bc1b 3844 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3845 struct hci_chan *chan;
3846 struct sk_buff *skb;
3847 int quote;
bd1eb66b 3848 u8 type;
b71d385a 3849
63d2bc1b 3850 __check_timeout(hdev, cnt);
b71d385a 3851
bd1eb66b
AE		 3852 BT_DBG("%s", hdev->name);
3853
3854 if (hdev->dev_type == HCI_AMP)
3855 type = AMP_LINK;
3856 else
3857 type = ACL_LINK;
3858
b71d385a 3859 while (hdev->block_cnt > 0 &&
bd1eb66b 3860 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3861 u32 priority = (skb_peek(&chan->data_q))->priority;
3862 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3863 int blocks;
3864
3865 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3866 skb->len, skb->priority);
b71d385a
AE		 3867
3868 /* Stop if priority has changed */
3869 if (skb->priority < priority)
3870 break;
3871
3872 skb = skb_dequeue(&chan->data_q);
3873
3874 blocks = __get_blocks(hdev, skb);
3875 if (blocks > hdev->block_cnt)
3876 return;
3877
3878 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3879 bt_cb(skb)->force_active);
b71d385a 3880
57d17d70 3881 hci_send_frame(hdev, skb);
b71d385a
AE		 3882 hdev->acl_last_tx = jiffies;
3883
3884 hdev->block_cnt -= blocks;
3885 quote -= blocks;
3886
3887 chan->sent += blocks;
3888 chan->conn->sent += blocks;
3889 }
3890 }
3891
3892 if (cnt != hdev->block_cnt)
bd1eb66b 3893 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3894}
3895
6039aa73 3896static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3897{
3898 BT_DBG("%s", hdev->name);
3899
bd1eb66b
AE		 3900 /* No ACL link over BR/EDR controller */
3901 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3902 return;
3903
3904 /* No AMP link over AMP controller */
3905 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3906 return;
3907
3908 switch (hdev->flow_ctl_mode) {
3909 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3910 hci_sched_acl_pkt(hdev);
3911 break;
3912
3913 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3914 hci_sched_acl_blk(hdev);
3915 break;
3916 }
3917}
3918
1da177e4 3919/* Schedule SCO */
6039aa73 3920static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3921{
3922 struct hci_conn *conn;
3923 struct sk_buff *skb;
3924 int quote;
3925
3926 BT_DBG("%s", hdev->name);
3927
52087a79
LAD		 3928 if (!hci_conn_num(hdev, SCO_LINK))
3929 return;
3930
1da177e4
LT		 3931 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3932 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3933 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3934 hci_send_frame(hdev, skb);
1da177e4
LT		 3935
3936 conn->sent++;
3937 if (conn->sent == ~0)
3938 conn->sent = 0;
3939 }
3940 }
3941}
3942
6039aa73 3943static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3944{
3945 struct hci_conn *conn;
3946 struct sk_buff *skb;
3947 int quote;
3948
3949 BT_DBG("%s", hdev->name);
3950
52087a79
LAD		 3951 if (!hci_conn_num(hdev, ESCO_LINK))
3952 return;
3953
8fc9ced3
GP		 3954 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3955 &quote))) {
b6a0dc82
MH		 3956 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3957 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3958 hci_send_frame(hdev, skb);
b6a0dc82
MH		 3959
3960 conn->sent++;
3961 if (conn->sent == ~0)
3962 conn->sent = 0;
3963 }
3964 }
3965}
3966
6039aa73 3967static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3968{
73d80deb 3969 struct hci_chan *chan;
6ed58ec5 3970 struct sk_buff *skb;
02b20f0b 3971 int quote, cnt, tmp;
6ed58ec5
VT		 3972
3973 BT_DBG("%s", hdev->name);
3974
52087a79
LAD		 3975 if (!hci_conn_num(hdev, LE_LINK))
3976 return;
3977
4a964404 3978 if (!test_bit(HCI_UNCONFIGURED, &hdev->dev_flags)) {
6ed58ec5
VT		 3979 /* LE tx timeout must be longer than maximum
3980 * link supervision timeout (40.9 seconds) */
bae1f5d9 3981 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3982 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3983 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3984 }
3985
3986 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3987 tmp = cnt;
73d80deb 3988 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3989 u32 priority = (skb_peek(&chan->data_q))->priority;
3990 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3991 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3992 skb->len, skb->priority);
6ed58ec5 3993
ec1cce24
LAD		 3994 /* Stop if priority has changed */
3995 if (skb->priority < priority)
3996 break;
3997
3998 skb = skb_dequeue(&chan->data_q);
3999
57d17d70 4000 hci_send_frame(hdev, skb);
6ed58ec5
VT		 4001 hdev->le_last_tx = jiffies;
4002
4003 cnt--;
73d80deb
LAD		 4004 chan->sent++;
4005 chan->conn->sent++;
6ed58ec5
VT		 4006 }
4007 }
73d80deb 4008
6ed58ec5
VT		 4009 if (hdev->le_pkts)
4010 hdev->le_cnt = cnt;
4011 else
4012 hdev->acl_cnt = cnt;
02b20f0b
LAD		 4013
4014 if (cnt != tmp)
4015 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 4016}
4017
3eff45ea 4018static void hci_tx_work(struct work_struct *work)
1da177e4 4019{
3eff45ea 4020 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 4021 struct sk_buff *skb;
4022
6ed58ec5 4023 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 4024 hdev->sco_cnt, hdev->le_cnt);
1da177e4 4025
52de599e
MH		 4026 if (!test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
4027 /* Schedule queues and send stuff to HCI driver */
4028 hci_sched_acl(hdev);
4029 hci_sched_sco(hdev);
4030 hci_sched_esco(hdev);
4031 hci_sched_le(hdev);
4032 }
6ed58ec5 4033
1da177e4
LT		 4034 /* Send next queued raw (unknown type) packet */
4035 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 4036 hci_send_frame(hdev, skb);
1da177e4
LT		 4037}
4038
25985edc 4039/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 4040
4041/* ACL data packet */
6039aa73 4042static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 4043{
4044 struct hci_acl_hdr *hdr = (void *) skb->data;
4045 struct hci_conn *conn;
4046 __u16 handle, flags;
4047
4048 skb_pull(skb, HCI_ACL_HDR_SIZE);
4049
4050 handle = __le16_to_cpu(hdr->handle);
4051 flags = hci_flags(handle);
4052 handle = hci_handle(handle);
4053
f0e09510 4054 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 4055 handle, flags);
1da177e4
LT		 4056
4057 hdev->stat.acl_rx++;
4058
4059 hci_dev_lock(hdev);
4060 conn = hci_conn_hash_lookup_handle(hdev, handle);
4061 hci_dev_unlock(hdev);
8e87d142 4062
1da177e4 4063 if (conn) {
65983fc7 4064 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 4065
1da177e4 4066 /* Send to upper protocol */
686ebf28
UF		 4067 l2cap_recv_acldata(conn, skb, flags);
4068 return;
1da177e4 4069 } else {
8e87d142 4070 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 4071 hdev->name, handle);
1da177e4
LT		 4072 }
4073
4074 kfree_skb(skb);
4075}
4076
4077/* SCO data packet */
6039aa73 4078static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 4079{
4080 struct hci_sco_hdr *hdr = (void *) skb->data;
4081 struct hci_conn *conn;
4082 __u16 handle;
4083
4084 skb_pull(skb, HCI_SCO_HDR_SIZE);
4085
4086 handle = __le16_to_cpu(hdr->handle);
4087
f0e09510 4088 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 4089
4090 hdev->stat.sco_rx++;
4091
4092 hci_dev_lock(hdev);
4093 conn = hci_conn_hash_lookup_handle(hdev, handle);
4094 hci_dev_unlock(hdev);
4095
4096 if (conn) {
1da177e4 4097 /* Send to upper protocol */
686ebf28
UF		 4098 sco_recv_scodata(conn, skb);
4099 return;
1da177e4 4100 } else {
8e87d142 4101 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 4102 hdev->name, handle);
1da177e4
LT		 4103 }
4104
4105 kfree_skb(skb);
4106}
4107
9238f36a
JH		 4108static bool hci_req_is_complete(struct hci_dev *hdev)
4109{
4110 struct sk_buff *skb;
4111
4112 skb = skb_peek(&hdev->cmd_q);
4113 if (!skb)
4114 return true;
4115
4116 return bt_cb(skb)->req.start;
4117}
4118
42c6b129
JH		 4119static void hci_resend_last(struct hci_dev *hdev)
4120{
4121 struct hci_command_hdr *sent;
4122 struct sk_buff *skb;
4123 u16 opcode;
4124
4125 if (!hdev->sent_cmd)
4126 return;
4127
4128 sent = (void *) hdev->sent_cmd->data;
4129 opcode = __le16_to_cpu(sent->opcode);
4130 if (opcode == HCI_OP_RESET)
4131 return;
4132
4133 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4134 if (!skb)
4135 return;
4136
4137 skb_queue_head(&hdev->cmd_q, skb);
4138 queue_work(hdev->workqueue, &hdev->cmd_work);
4139}
4140
9238f36a
JH		 4141void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
4142{
4143 hci_req_complete_t req_complete = NULL;
4144 struct sk_buff *skb;
4145 unsigned long flags;
4146
4147 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4148
42c6b129
JH		 4149 /* If the completed command doesn't match the last one that was
4150 * sent we need to do special handling of it.
9238f36a 4151 */
42c6b129
JH		 4152 if (!hci_sent_cmd_data(hdev, opcode)) {
4153 /* Some CSR based controllers generate a spontaneous
4154 * reset complete event during init and any pending
4155 * command will never be completed. In such a case we
4156 * need to resend whatever was the last sent
4157 * command.
4158 */
4159 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4160 hci_resend_last(hdev);
4161
9238f36a 4162 return;
42c6b129 4163 }
9238f36a
JH		 4164
4165 /* If the command succeeded and there's still more commands in
4166 * this request the request is not yet complete.
4167 */
4168 if (!status && !hci_req_is_complete(hdev))
4169 return;
4170
4171 /* If this was the last command in a request the complete
4172 * callback would be found in hdev->sent_cmd instead of the
4173 * command queue (hdev->cmd_q).
4174 */
4175 if (hdev->sent_cmd) {
4176 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 4177
4178 if (req_complete) {
4179 /* We must set the complete callback to NULL to
4180 * avoid calling the callback more than once if
4181 * this function gets called again.
4182 */
4183 bt_cb(hdev->sent_cmd)->req.complete = NULL;
4184
9238f36a 4185 goto call_complete;
53e21fbc 4186 }
9238f36a
JH		 4187 }
4188
4189 /* Remove all pending commands belonging to this request */
4190 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4191 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4192 if (bt_cb(skb)->req.start) {
4193 __skb_queue_head(&hdev->cmd_q, skb);
4194 break;
4195 }
4196
4197 req_complete = bt_cb(skb)->req.complete;
4198 kfree_skb(skb);
4199 }
4200 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4201
4202call_complete:
4203 if (req_complete)
1904a853 4204 req_complete(hdev, status, status ? opcode : HCI_OP_NOP);
9238f36a
JH		 4205}
4206
b78752cc 4207static void hci_rx_work(struct work_struct *work)
1da177e4 4208{
b78752cc 4209 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 4210 struct sk_buff *skb;
4211
4212 BT_DBG("%s", hdev->name);
4213
1da177e4 4214 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 4215 /* Send copy to monitor */
4216 hci_send_to_monitor(hdev, skb);
4217
1da177e4
LT		 4218 if (atomic_read(&hdev->promisc)) {
4219 /* Send copy to the sockets */
470fe1b5 4220 hci_send_to_sock(hdev, skb);
1da177e4
LT		 4221 }
4222
fee746b0 4223 if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
1da177e4
LT		 4224 kfree_skb(skb);
4225 continue;
4226 }
4227
4228 if (test_bit(HCI_INIT, &hdev->flags)) {
4229 /* Don't process data packets in this states. */
0d48d939 4230 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 4231 case HCI_ACLDATA_PKT:
4232 case HCI_SCODATA_PKT:
4233 kfree_skb(skb);
4234 continue;
3ff50b79 4235 }
1da177e4
LT		 4236 }
4237
4238 /* Process frame */
0d48d939 4239 switch (bt_cb(skb)->pkt_type) {
1da177e4 4240 case HCI_EVENT_PKT:
b78752cc 4241 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 4242 hci_event_packet(hdev, skb);
4243 break;
4244
4245 case HCI_ACLDATA_PKT:
4246 BT_DBG("%s ACL data packet", hdev->name);
4247 hci_acldata_packet(hdev, skb);
4248 break;
4249
4250 case HCI_SCODATA_PKT:
4251 BT_DBG("%s SCO data packet", hdev->name);
4252 hci_scodata_packet(hdev, skb);
4253 break;
4254
4255 default:
4256 kfree_skb(skb);
4257 break;
4258 }
4259 }
1da177e4
LT		 4260}
4261
c347b765 4262static void hci_cmd_work(struct work_struct *work)
1da177e4 4263{
c347b765 4264 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 4265 struct sk_buff *skb;
4266
2104786b
AE		 4267 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4268 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 4269
1da177e4 4270 /* Send queued commands */
5a08ecce
AE		 4271 if (atomic_read(&hdev->cmd_cnt)) {
4272 skb = skb_dequeue(&hdev->cmd_q);
4273 if (!skb)
4274 return;
4275
7585b97a 4276 kfree_skb(hdev->sent_cmd);
1da177e4 4277
a675d7f1 4278 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 4279 if (hdev->sent_cmd) {
1da177e4 4280 atomic_dec(&hdev->cmd_cnt);
57d17d70 4281 hci_send_frame(hdev, skb);
7bdb8a5c 4282 if (test_bit(HCI_RESET, &hdev->flags))
65cc2b49 4283 cancel_delayed_work(&hdev->cmd_timer);
7bdb8a5c 4284 else
65cc2b49
MH		 4285 schedule_delayed_work(&hdev->cmd_timer,
4286 HCI_CMD_TIMEOUT);
1da177e4
LT		 4287 } else {
4288 skb_queue_head(&hdev->cmd_q, skb);
c347b765 4289 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 4290 }
4291 }
4292}
Linux kernel - Deliverables
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