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Bluetooth: Fix handling of getsockname() for HCI sockets
[deliverable/linux.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
1da177e4 30
8c520a59 31#include <linux/rfkill.h>
1da177e4
LT		 32
33#include <net/bluetooth/bluetooth.h>
34#include <net/bluetooth/hci_core.h>
35
b78752cc 36static void hci_rx_work(struct work_struct *work);
c347b765 37static void hci_cmd_work(struct work_struct *work);
3eff45ea 38static void hci_tx_work(struct work_struct *work);
1da177e4 39
1da177e4
LT		 40/* HCI device list */
41LIST_HEAD(hci_dev_list);
42DEFINE_RWLOCK(hci_dev_list_lock);
43
44/* HCI callback list */
45LIST_HEAD(hci_cb_list);
46DEFINE_RWLOCK(hci_cb_list_lock);
47
3df92b31
SL		 48/* HCI ID Numbering */
49static DEFINE_IDA(hci_index_ida);
50
1da177e4
LT		 51/* ---- HCI notifications ---- */
52
6516455d 53static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 54{
040030ef 55 hci_sock_dev_event(hdev, event);
1da177e4
LT		 56}
57
58/* ---- HCI requests ---- */
59
42c6b129 60static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
1da177e4 61{
42c6b129 62 BT_DBG("%s result 0x%2.2x", hdev->name, result);
1da177e4
LT		 63
64 if (hdev->req_status == HCI_REQ_PEND) {
65 hdev->req_result = result;
66 hdev->req_status = HCI_REQ_DONE;
67 wake_up_interruptible(&hdev->req_wait_q);
68 }
69}
70
71static void hci_req_cancel(struct hci_dev *hdev, int err)
72{
73 BT_DBG("%s err 0x%2.2x", hdev->name, err);
74
75 if (hdev->req_status == HCI_REQ_PEND) {
76 hdev->req_result = err;
77 hdev->req_status = HCI_REQ_CANCELED;
78 wake_up_interruptible(&hdev->req_wait_q);
79 }
80}
81
77a63e0a
FW		 82static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
83 u8 event)
75e84b7c
JH		 84{
85 struct hci_ev_cmd_complete *ev;
86 struct hci_event_hdr *hdr;
87 struct sk_buff *skb;
88
89 hci_dev_lock(hdev);
90
91 skb = hdev->recv_evt;
92 hdev->recv_evt = NULL;
93
94 hci_dev_unlock(hdev);
95
96 if (!skb)
97 return ERR_PTR(-ENODATA);
98
99 if (skb->len < sizeof(*hdr)) {
100 BT_ERR("Too short HCI event");
101 goto failed;
102 }
103
104 hdr = (void *) skb->data;
105 skb_pull(skb, HCI_EVENT_HDR_SIZE);
106
7b1abbbe
JH		 107 if (event) {
108 if (hdr->evt != event)
109 goto failed;
110 return skb;
111 }
112
75e84b7c
JH		 113 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
114 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
115 goto failed;
116 }
117
118 if (skb->len < sizeof(*ev)) {
119 BT_ERR("Too short cmd_complete event");
120 goto failed;
121 }
122
123 ev = (void *) skb->data;
124 skb_pull(skb, sizeof(*ev));
125
126 if (opcode == __le16_to_cpu(ev->opcode))
127 return skb;
128
129 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
130 __le16_to_cpu(ev->opcode));
131
132failed:
133 kfree_skb(skb);
134 return ERR_PTR(-ENODATA);
135}
136
7b1abbbe 137struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 138 const void *param, u8 event, u32 timeout)
75e84b7c
JH		 139{
140 DECLARE_WAITQUEUE(wait, current);
141 struct hci_request req;
142 int err = 0;
143
144 BT_DBG("%s", hdev->name);
145
146 hci_req_init(&req, hdev);
147
7b1abbbe 148 hci_req_add_ev(&req, opcode, plen, param, event);
75e84b7c
JH		 149
150 hdev->req_status = HCI_REQ_PEND;
151
152 err = hci_req_run(&req, hci_req_sync_complete);
153 if (err < 0)
154 return ERR_PTR(err);
155
156 add_wait_queue(&hdev->req_wait_q, &wait);
157 set_current_state(TASK_INTERRUPTIBLE);
158
159 schedule_timeout(timeout);
160
161 remove_wait_queue(&hdev->req_wait_q, &wait);
162
163 if (signal_pending(current))
164 return ERR_PTR(-EINTR);
165
166 switch (hdev->req_status) {
167 case HCI_REQ_DONE:
168 err = -bt_to_errno(hdev->req_result);
169 break;
170
171 case HCI_REQ_CANCELED:
172 err = -hdev->req_result;
173 break;
174
175 default:
176 err = -ETIMEDOUT;
177 break;
178 }
179
180 hdev->req_status = hdev->req_result = 0;
181
182 BT_DBG("%s end: err %d", hdev->name, err);
183
184 if (err < 0)
185 return ERR_PTR(err);
186
7b1abbbe
JH		 187 return hci_get_cmd_complete(hdev, opcode, event);
188}
189EXPORT_SYMBOL(__hci_cmd_sync_ev);
190
191struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
07dc93dd 192 const void *param, u32 timeout)
7b1abbbe
JH		 193{
194 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
75e84b7c
JH		 195}
196EXPORT_SYMBOL(__hci_cmd_sync);
197
1da177e4 198/* Execute request and wait for completion. */
01178cd4 199static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 200 void (*func)(struct hci_request *req,
201 unsigned long opt),
01178cd4 202 unsigned long opt, __u32 timeout)
1da177e4 203{
42c6b129 204 struct hci_request req;
1da177e4
LT		 205 DECLARE_WAITQUEUE(wait, current);
206 int err = 0;
207
208 BT_DBG("%s start", hdev->name);
209
42c6b129
JH		 210 hci_req_init(&req, hdev);
211
1da177e4
LT		 212 hdev->req_status = HCI_REQ_PEND;
213
42c6b129 214 func(&req, opt);
53cce22d 215
42c6b129
JH		 216 err = hci_req_run(&req, hci_req_sync_complete);
217 if (err < 0) {
53cce22d 218 hdev->req_status = 0;
920c8300
AG		 219
220 /* ENODATA means the HCI request command queue is empty.
221 * This can happen when a request with conditionals doesn't
222 * trigger any commands to be sent. This is normal behavior
223 * and should not trigger an error return.
42c6b129 224 */
920c8300
AG		 225 if (err == -ENODATA)
226 return 0;
227
228 return err;
53cce22d
JH		 229 }
230
bc4445c7
AG		 231 add_wait_queue(&hdev->req_wait_q, &wait);
232 set_current_state(TASK_INTERRUPTIBLE);
233
1da177e4
LT		 234 schedule_timeout(timeout);
235
236 remove_wait_queue(&hdev->req_wait_q, &wait);
237
238 if (signal_pending(current))
239 return -EINTR;
240
241 switch (hdev->req_status) {
242 case HCI_REQ_DONE:
e175072f 243 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 244 break;
245
246 case HCI_REQ_CANCELED:
247 err = -hdev->req_result;
248 break;
249
250 default:
251 err = -ETIMEDOUT;
252 break;
3ff50b79 253 }
1da177e4 254
a5040efa 255 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 256
257 BT_DBG("%s end: err %d", hdev->name, err);
258
259 return err;
260}
261
01178cd4 262static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 263 void (*req)(struct hci_request *req,
264 unsigned long opt),
01178cd4 265 unsigned long opt, __u32 timeout)
1da177e4
LT		 266{
267 int ret;
268
7c6a329e
MH		 269 if (!test_bit(HCI_UP, &hdev->flags))
270 return -ENETDOWN;
271
1da177e4
LT		 272 /* Serialize all requests */
273 hci_req_lock(hdev);
01178cd4 274 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 275 hci_req_unlock(hdev);
276
277 return ret;
278}
279
42c6b129 280static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 281{
42c6b129 282 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 283
284 /* Reset device */
42c6b129
JH		 285 set_bit(HCI_RESET, &req->hdev->flags);
286 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 287}
288
42c6b129 289static void bredr_init(struct hci_request *req)
1da177e4 290{
42c6b129 291 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 292
1da177e4 293 /* Read Local Supported Features */
42c6b129 294 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 295
1143e5a6 296 /* Read Local Version */
42c6b129 297 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 298
299 /* Read BD Address */
42c6b129 300 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 301}
302
42c6b129 303static void amp_init(struct hci_request *req)
e61ef499 304{
42c6b129 305 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 306
e61ef499 307 /* Read Local Version */
42c6b129 308 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 309
310 /* Read Local AMP Info */
42c6b129 311 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 312
313 /* Read Data Blk size */
42c6b129 314 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
e61ef499
AE		 315}
316
42c6b129 317static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 318{
42c6b129 319 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 320
321 BT_DBG("%s %ld", hdev->name, opt);
322
11778716
AE		 323 /* Reset */
324 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 325 hci_reset_req(req, 0);
11778716 326
e61ef499
AE		 327 switch (hdev->dev_type) {
328 case HCI_BREDR:
42c6b129 329 bredr_init(req);
e61ef499
AE		 330 break;
331
332 case HCI_AMP:
42c6b129 333 amp_init(req);
e61ef499
AE		 334 break;
335
336 default:
337 BT_ERR("Unknown device type %d", hdev->dev_type);
338 break;
339 }
e61ef499
AE		 340}
341
42c6b129 342static void bredr_setup(struct hci_request *req)
2177bab5 343{
2177bab5
JH		 344 __le16 param;
345 __u8 flt_type;
346
347 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 348 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 349
350 /* Read Class of Device */
42c6b129 351 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 352
353 /* Read Local Name */
42c6b129 354 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 355
356 /* Read Voice Setting */
42c6b129 357 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5
JH		 358
359 /* Clear Event Filters */
360 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 361 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 362
363 /* Connection accept timeout ~20 secs */
364 param = __constant_cpu_to_le16(0x7d00);
42c6b129 365 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5 366
f332ec66
JH		 367 /* Read page scan parameters */
368 if (req->hdev->hci_ver > BLUETOOTH_VER_1_1) {
369 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
370 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
371 }
2177bab5
JH		 372}
373
42c6b129 374static void le_setup(struct hci_request *req)
2177bab5 375{
c73eee91
JH		 376 struct hci_dev *hdev = req->hdev;
377
2177bab5 378 /* Read LE Buffer Size */
42c6b129 379 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 380
381 /* Read LE Local Supported Features */
42c6b129 382 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5
JH		 383
384 /* Read LE Advertising Channel TX Power */
42c6b129 385 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH		 386
387 /* Read LE White List Size */
42c6b129 388 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5
JH		 389
390 /* Read LE Supported States */
42c6b129 391 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
c73eee91
JH		 392
393 /* LE-only controllers have LE implicitly enabled */
394 if (!lmp_bredr_capable(hdev))
395 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
2177bab5
JH		 396}
397
398static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
399{
400 if (lmp_ext_inq_capable(hdev))
401 return 0x02;
402
403 if (lmp_inq_rssi_capable(hdev))
404 return 0x01;
405
406 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
407 hdev->lmp_subver == 0x0757)
408 return 0x01;
409
410 if (hdev->manufacturer == 15) {
411 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
412 return 0x01;
413 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
414 return 0x01;
415 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
416 return 0x01;
417 }
418
419 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
420 hdev->lmp_subver == 0x1805)
421 return 0x01;
422
423 return 0x00;
424}
425
42c6b129 426static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 427{
428 u8 mode;
429
42c6b129 430 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 431
42c6b129 432 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 433}
434
42c6b129 435static void hci_setup_event_mask(struct hci_request *req)
2177bab5 436{
42c6b129
JH		 437 struct hci_dev *hdev = req->hdev;
438
2177bab5
JH		 439 /* The second byte is 0xff instead of 0x9f (two reserved bits
440 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
441 * command otherwise.
442 */
443 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
444
445 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
446 * any event mask for pre 1.2 devices.
447 */
448 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
449 return;
450
451 if (lmp_bredr_capable(hdev)) {
452 events[4] |= 0x01; /* Flow Specification Complete */
453 events[4] |= 0x02; /* Inquiry Result with RSSI */
454 events[4] |= 0x04; /* Read Remote Extended Features Complete */
455 events[5] |= 0x08; /* Synchronous Connection Complete */
456 events[5] |= 0x10; /* Synchronous Connection Changed */
c7882cbd
MH		 457 } else {
458 /* Use a different default for LE-only devices */
459 memset(events, 0, sizeof(events));
460 events[0] |= 0x10; /* Disconnection Complete */
461 events[0] |= 0x80; /* Encryption Change */
462 events[1] |= 0x08; /* Read Remote Version Information Complete */
463 events[1] |= 0x20; /* Command Complete */
464 events[1] |= 0x40; /* Command Status */
465 events[1] |= 0x80; /* Hardware Error */
466 events[2] |= 0x04; /* Number of Completed Packets */
467 events[3] |= 0x02; /* Data Buffer Overflow */
468 events[5] |= 0x80; /* Encryption Key Refresh Complete */
2177bab5
JH		 469 }
470
471 if (lmp_inq_rssi_capable(hdev))
472 events[4] |= 0x02; /* Inquiry Result with RSSI */
473
474 if (lmp_sniffsubr_capable(hdev))
475 events[5] |= 0x20; /* Sniff Subrating */
476
477 if (lmp_pause_enc_capable(hdev))
478 events[5] |= 0x80; /* Encryption Key Refresh Complete */
479
480 if (lmp_ext_inq_capable(hdev))
481 events[5] |= 0x40; /* Extended Inquiry Result */
482
483 if (lmp_no_flush_capable(hdev))
484 events[7] |= 0x01; /* Enhanced Flush Complete */
485
486 if (lmp_lsto_capable(hdev))
487 events[6] |= 0x80; /* Link Supervision Timeout Changed */
488
489 if (lmp_ssp_capable(hdev)) {
490 events[6] |= 0x01; /* IO Capability Request */
491 events[6] |= 0x02; /* IO Capability Response */
492 events[6] |= 0x04; /* User Confirmation Request */
493 events[6] |= 0x08; /* User Passkey Request */
494 events[6] |= 0x10; /* Remote OOB Data Request */
495 events[6] |= 0x20; /* Simple Pairing Complete */
496 events[7] |= 0x04; /* User Passkey Notification */
497 events[7] |= 0x08; /* Keypress Notification */
498 events[7] |= 0x10; /* Remote Host Supported
499 * Features Notification
500 */
501 }
502
503 if (lmp_le_capable(hdev))
504 events[7] |= 0x20; /* LE Meta-Event */
505
42c6b129 506 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 507
508 if (lmp_le_capable(hdev)) {
509 memset(events, 0, sizeof(events));
510 events[0] = 0x1f;
42c6b129
JH		 511 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
512 sizeof(events), events);
2177bab5
JH		 513 }
514}
515
42c6b129 516static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 517{
42c6b129
JH		 518 struct hci_dev *hdev = req->hdev;
519
2177bab5 520 if (lmp_bredr_capable(hdev))
42c6b129 521 bredr_setup(req);
2177bab5
JH		 522
523 if (lmp_le_capable(hdev))
42c6b129 524 le_setup(req);
2177bab5 525
42c6b129 526 hci_setup_event_mask(req);
2177bab5 527
3f8e2d75
JH		 528 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
529 * local supported commands HCI command.
530 */
531 if (hdev->manufacturer != 31 && hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 532 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 533
534 if (lmp_ssp_capable(hdev)) {
535 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
536 u8 mode = 0x01;
42c6b129
JH		 537 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
538 sizeof(mode), &mode);
2177bab5
JH		 539 } else {
540 struct hci_cp_write_eir cp;
541
542 memset(hdev->eir, 0, sizeof(hdev->eir));
543 memset(&cp, 0, sizeof(cp));
544
42c6b129 545 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 546 }
547 }
548
549 if (lmp_inq_rssi_capable(hdev))
42c6b129 550 hci_setup_inquiry_mode(req);
2177bab5
JH		 551
552 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 553 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 554
555 if (lmp_ext_feat_capable(hdev)) {
556 struct hci_cp_read_local_ext_features cp;
557
558 cp.page = 0x01;
42c6b129
JH		 559 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
560 sizeof(cp), &cp);
2177bab5
JH		 561 }
562
563 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
564 u8 enable = 1;
42c6b129
JH		 565 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
566 &enable);
2177bab5
JH		 567 }
568}
569
42c6b129 570static void hci_setup_link_policy(struct hci_request *req)
2177bab5 571{
42c6b129 572 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 573 struct hci_cp_write_def_link_policy cp;
574 u16 link_policy = 0;
575
576 if (lmp_rswitch_capable(hdev))
577 link_policy |= HCI_LP_RSWITCH;
578 if (lmp_hold_capable(hdev))
579 link_policy |= HCI_LP_HOLD;
580 if (lmp_sniff_capable(hdev))
581 link_policy |= HCI_LP_SNIFF;
582 if (lmp_park_capable(hdev))
583 link_policy |= HCI_LP_PARK;
584
585 cp.policy = cpu_to_le16(link_policy);
42c6b129 586 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 587}
588
42c6b129 589static void hci_set_le_support(struct hci_request *req)
2177bab5 590{
42c6b129 591 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 592 struct hci_cp_write_le_host_supported cp;
593
c73eee91
JH		 594 /* LE-only devices do not support explicit enablement */
595 if (!lmp_bredr_capable(hdev))
596 return;
597
2177bab5
JH		 598 memset(&cp, 0, sizeof(cp));
599
600 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
601 cp.le = 0x01;
602 cp.simul = lmp_le_br_capable(hdev);
603 }
604
605 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 606 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
607 &cp);
2177bab5
JH		 608}
609
42c6b129 610static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 611{
42c6b129 612 struct hci_dev *hdev = req->hdev;
d2c5d77f 613 u8 p;
42c6b129 614
b8f4e068
GP		 615 /* Some Broadcom based Bluetooth controllers do not support the
616 * Delete Stored Link Key command. They are clearly indicating its
617 * absence in the bit mask of supported commands.
618 *
619 * Check the supported commands and only if the the command is marked
620 * as supported send it. If not supported assume that the controller
621 * does not have actual support for stored link keys which makes this
622 * command redundant anyway.
637b4cae 623 */
59f45d57
JH		 624 if (hdev->commands[6] & 0x80) {
625 struct hci_cp_delete_stored_link_key cp;
626
627 bacpy(&cp.bdaddr, BDADDR_ANY);
628 cp.delete_all = 0x01;
629 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
630 sizeof(cp), &cp);
631 }
632
2177bab5 633 if (hdev->commands[5] & 0x10)
42c6b129 634 hci_setup_link_policy(req);
2177bab5 635
04b4edcb 636 if (lmp_le_capable(hdev)) {
42c6b129 637 hci_set_le_support(req);
04b4edcb
JH		 638 hci_update_ad(req);
639 }
d2c5d77f
JH		 640
641 /* Read features beyond page 1 if available */
642 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
643 struct hci_cp_read_local_ext_features cp;
644
645 cp.page = p;
646 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
647 sizeof(cp), &cp);
648 }
2177bab5
JH		 649}
650
651static int __hci_init(struct hci_dev *hdev)
652{
653 int err;
654
655 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
656 if (err < 0)
657 return err;
658
659 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
660 * BR/EDR/LE type controllers. AMP controllers only need the
661 * first stage init.
662 */
663 if (hdev->dev_type != HCI_BREDR)
664 return 0;
665
666 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
667 if (err < 0)
668 return err;
669
670 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
671}
672
42c6b129 673static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 674{
675 __u8 scan = opt;
676
42c6b129 677 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 678
679 /* Inquiry and Page scans */
42c6b129 680 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 681}
682
42c6b129 683static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 684{
685 __u8 auth = opt;
686
42c6b129 687 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 688
689 /* Authentication */
42c6b129 690 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 691}
692
42c6b129 693static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 694{
695 __u8 encrypt = opt;
696
42c6b129 697 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 698
e4e8e37c 699 /* Encryption */
42c6b129 700 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 701}
702
42c6b129 703static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 704{
705 __le16 policy = cpu_to_le16(opt);
706
42c6b129 707 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 708
709 /* Default link policy */
42c6b129 710 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 711}
712
8e87d142 713/* Get HCI device by index.
1da177e4
LT		 714 * Device is held on return. */
715struct hci_dev *hci_dev_get(int index)
716{
8035ded4 717 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 718
719 BT_DBG("%d", index);
720
721 if (index < 0)
722 return NULL;
723
724 read_lock(&hci_dev_list_lock);
8035ded4 725 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 726 if (d->id == index) {
727 hdev = hci_dev_hold(d);
728 break;
729 }
730 }
731 read_unlock(&hci_dev_list_lock);
732 return hdev;
733}
1da177e4
LT		 734
735/* ---- Inquiry support ---- */
ff9ef578 736
30dc78e1
JH		 737bool hci_discovery_active(struct hci_dev *hdev)
738{
739 struct discovery_state *discov = &hdev->discovery;
740
6fbe195d 741 switch (discov->state) {
343f935b 742 case DISCOVERY_FINDING:
6fbe195d 743 case DISCOVERY_RESOLVING:
30dc78e1
JH		 744 return true;
745
6fbe195d
AG		 746 default:
747 return false;
748 }
30dc78e1
JH		 749}
750
ff9ef578
JH		 751void hci_discovery_set_state(struct hci_dev *hdev, int state)
752{
753 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
754
755 if (hdev->discovery.state == state)
756 return;
757
758 switch (state) {
759 case DISCOVERY_STOPPED:
7b99b659
AG		 760 if (hdev->discovery.state != DISCOVERY_STARTING)
761 mgmt_discovering(hdev, 0);
ff9ef578
JH		 762 break;
763 case DISCOVERY_STARTING:
764 break;
343f935b 765 case DISCOVERY_FINDING:
ff9ef578
JH		 766 mgmt_discovering(hdev, 1);
767 break;
30dc78e1
JH		 768 case DISCOVERY_RESOLVING:
769 break;
ff9ef578
JH		 770 case DISCOVERY_STOPPING:
771 break;
772 }
773
774 hdev->discovery.state = state;
775}
776
1f9b9a5d 777void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 778{
30883512 779 struct discovery_state *cache = &hdev->discovery;
b57c1a56 780 struct inquiry_entry *p, *n;
1da177e4 781
561aafbc
JH		 782 list_for_each_entry_safe(p, n, &cache->all, all) {
783 list_del(&p->all);
b57c1a56 784 kfree(p);
1da177e4 785 }
561aafbc
JH		 786
787 INIT_LIST_HEAD(&cache->unknown);
788 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 789}
790
a8c5fb1a
GP		 791struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
792 bdaddr_t *bdaddr)
1da177e4 793{
30883512 794 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 795 struct inquiry_entry *e;
796
6ed93dc6 797 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 798
561aafbc
JH		 799 list_for_each_entry(e, &cache->all, all) {
800 if (!bacmp(&e->data.bdaddr, bdaddr))
801 return e;
802 }
803
804 return NULL;
805}
806
807struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 808 bdaddr_t *bdaddr)
561aafbc 809{
30883512 810 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 811 struct inquiry_entry *e;
812
6ed93dc6 813 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 814
815 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 816 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 817 return e;
818 }
819
820 return NULL;
1da177e4
LT		 821}
822
30dc78e1 823struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 824 bdaddr_t *bdaddr,
825 int state)
30dc78e1
JH		 826{
827 struct discovery_state *cache = &hdev->discovery;
828 struct inquiry_entry *e;
829
6ed93dc6 830 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 831
832 list_for_each_entry(e, &cache->resolve, list) {
833 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
834 return e;
835 if (!bacmp(&e->data.bdaddr, bdaddr))
836 return e;
837 }
838
839 return NULL;
840}
841
a3d4e20a 842void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 843 struct inquiry_entry *ie)
a3d4e20a
JH		 844{
845 struct discovery_state *cache = &hdev->discovery;
846 struct list_head *pos = &cache->resolve;
847 struct inquiry_entry *p;
848
849 list_del(&ie->list);
850
851 list_for_each_entry(p, &cache->resolve, list) {
852 if (p->name_state != NAME_PENDING &&
a8c5fb1a 853 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 854 break;
855 pos = &p->list;
856 }
857
858 list_add(&ie->list, pos);
859}
860
3175405b 861bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 862 bool name_known, bool *ssp)
1da177e4 863{
30883512 864 struct discovery_state *cache = &hdev->discovery;
70f23020 865 struct inquiry_entry *ie;
1da177e4 866
6ed93dc6 867 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 868
2b2fec4d
SJ		 869 hci_remove_remote_oob_data(hdev, &data->bdaddr);
870
388fc8fa
JH		 871 if (ssp)
872 *ssp = data->ssp_mode;
873
70f23020 874 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 875 if (ie) {
388fc8fa
JH		 876 if (ie->data.ssp_mode && ssp)
877 *ssp = true;
878
a3d4e20a 879 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 880 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 881 ie->data.rssi = data->rssi;
882 hci_inquiry_cache_update_resolve(hdev, ie);
883 }
884
561aafbc 885 goto update;
a3d4e20a 886 }
561aafbc
JH		 887
888 /* Entry not in the cache. Add new one. */
889 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
890 if (!ie)
3175405b 891 return false;
561aafbc
JH		 892
893 list_add(&ie->all, &cache->all);
894
895 if (name_known) {
896 ie->name_state = NAME_KNOWN;
897 } else {
898 ie->name_state = NAME_NOT_KNOWN;
899 list_add(&ie->list, &cache->unknown);
900 }
70f23020 901
561aafbc
JH		 902update:
903 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 904 ie->name_state != NAME_PENDING) {
561aafbc
JH		 905 ie->name_state = NAME_KNOWN;
906 list_del(&ie->list);
1da177e4
LT		 907 }
908
70f23020
AE		 909 memcpy(&ie->data, data, sizeof(*data));
910 ie->timestamp = jiffies;
1da177e4 911 cache->timestamp = jiffies;
3175405b
JH		 912
913 if (ie->name_state == NAME_NOT_KNOWN)
914 return false;
915
916 return true;
1da177e4
LT		 917}
918
919static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
920{
30883512 921 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 922 struct inquiry_info *info = (struct inquiry_info *) buf;
923 struct inquiry_entry *e;
924 int copied = 0;
925
561aafbc 926 list_for_each_entry(e, &cache->all, all) {
1da177e4 927 struct inquiry_data *data = &e->data;
b57c1a56
JH		 928
929 if (copied >= num)
930 break;
931
1da177e4
LT		 932 bacpy(&info->bdaddr, &data->bdaddr);
933 info->pscan_rep_mode = data->pscan_rep_mode;
934 info->pscan_period_mode = data->pscan_period_mode;
935 info->pscan_mode = data->pscan_mode;
936 memcpy(info->dev_class, data->dev_class, 3);
937 info->clock_offset = data->clock_offset;
b57c1a56 938
1da177e4 939 info++;
b57c1a56 940 copied++;
1da177e4
LT		 941 }
942
943 BT_DBG("cache %p, copied %d", cache, copied);
944 return copied;
945}
946
42c6b129 947static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 948{
949 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 950 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 951 struct hci_cp_inquiry cp;
952
953 BT_DBG("%s", hdev->name);
954
955 if (test_bit(HCI_INQUIRY, &hdev->flags))
956 return;
957
958 /* Start Inquiry */
959 memcpy(&cp.lap, &ir->lap, 3);
960 cp.length = ir->length;
961 cp.num_rsp = ir->num_rsp;
42c6b129 962 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 963}
964
3e13fa1e
AG		 965static int wait_inquiry(void *word)
966{
967 schedule();
968 return signal_pending(current);
969}
970
1da177e4
LT		 971int hci_inquiry(void __user *arg)
972{
973 __u8 __user *ptr = arg;
974 struct hci_inquiry_req ir;
975 struct hci_dev *hdev;
976 int err = 0, do_inquiry = 0, max_rsp;
977 long timeo;
978 __u8 *buf;
979
980 if (copy_from_user(&ir, ptr, sizeof(ir)))
981 return -EFAULT;
982
5a08ecce
AE		 983 hdev = hci_dev_get(ir.dev_id);
984 if (!hdev)
1da177e4
LT		 985 return -ENODEV;
986
09fd0de5 987 hci_dev_lock(hdev);
8e87d142 988 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 989 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 990 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 991 do_inquiry = 1;
992 }
09fd0de5 993 hci_dev_unlock(hdev);
1da177e4 994
04837f64 995 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 996
997 if (do_inquiry) {
01178cd4
JH		 998 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
999 timeo);
70f23020
AE		 1000 if (err < 0)
1001 goto done;
3e13fa1e
AG		 1002
1003 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1004 * cleared). If it is interrupted by a signal, return -EINTR.
1005 */
1006 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
1007 TASK_INTERRUPTIBLE))
1008 return -EINTR;
70f23020 1009 }
1da177e4 1010
8fc9ced3
GP		 1011 /* for unlimited number of responses we will use buffer with
1012 * 255 entries
1013 */
1da177e4
LT		 1014 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1015
1016 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1017 * copy it to the user space.
1018 */
01df8c31 1019 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1020 if (!buf) {
1da177e4
LT		 1021 err = -ENOMEM;
1022 goto done;
1023 }
1024
09fd0de5 1025 hci_dev_lock(hdev);
1da177e4 1026 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1027 hci_dev_unlock(hdev);
1da177e4
LT		 1028
1029 BT_DBG("num_rsp %d", ir.num_rsp);
1030
1031 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1032 ptr += sizeof(ir);
1033 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1034 ir.num_rsp))
1da177e4 1035 err = -EFAULT;
8e87d142 1036 } else
1da177e4
LT		 1037 err = -EFAULT;
1038
1039 kfree(buf);
1040
1041done:
1042 hci_dev_put(hdev);
1043 return err;
1044}
1045
3f0f524b
JH		 1046static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1047{
1048 u8 ad_len = 0, flags = 0;
1049 size_t name_len;
1050
1051 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1052 flags |= LE_AD_GENERAL;
1053
1054 if (!lmp_bredr_capable(hdev))
1055 flags |= LE_AD_NO_BREDR;
1056
1057 if (lmp_le_br_capable(hdev))
1058 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1059
1060 if (lmp_host_le_br_capable(hdev))
1061 flags |= LE_AD_SIM_LE_BREDR_HOST;
1062
1063 if (flags) {
1064 BT_DBG("adv flags 0x%02x", flags);
1065
1066 ptr[0] = 2;
1067 ptr[1] = EIR_FLAGS;
1068 ptr[2] = flags;
1069
1070 ad_len += 3;
1071 ptr += 3;
1072 }
1073
1074 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1075 ptr[0] = 2;
1076 ptr[1] = EIR_TX_POWER;
1077 ptr[2] = (u8) hdev->adv_tx_power;
1078
1079 ad_len += 3;
1080 ptr += 3;
1081 }
1082
1083 name_len = strlen(hdev->dev_name);
1084 if (name_len > 0) {
1085 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1086
1087 if (name_len > max_len) {
1088 name_len = max_len;
1089 ptr[1] = EIR_NAME_SHORT;
1090 } else
1091 ptr[1] = EIR_NAME_COMPLETE;
1092
1093 ptr[0] = name_len + 1;
1094
1095 memcpy(ptr + 2, hdev->dev_name, name_len);
1096
1097 ad_len += (name_len + 2);
1098 ptr += (name_len + 2);
1099 }
1100
1101 return ad_len;
1102}
1103
04b4edcb 1104void hci_update_ad(struct hci_request *req)
3f0f524b 1105{
04b4edcb 1106 struct hci_dev *hdev = req->hdev;
3f0f524b
JH		 1107 struct hci_cp_le_set_adv_data cp;
1108 u8 len;
3f0f524b 1109
04b4edcb
JH		 1110 if (!lmp_le_capable(hdev))
1111 return;
3f0f524b
JH		 1112
1113 memset(&cp, 0, sizeof(cp));
1114
1115 len = create_ad(hdev, cp.data);
1116
1117 if (hdev->adv_data_len == len &&
04b4edcb
JH		 1118 memcmp(cp.data, hdev->adv_data, len) == 0)
1119 return;
3f0f524b
JH		 1120
1121 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1122 hdev->adv_data_len = len;
1123
1124 cp.length = len;
3f0f524b 1125
04b4edcb 1126 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
3f0f524b
JH		 1127}
1128
1da177e4
LT		 1129/* ---- HCI ioctl helpers ---- */
1130
1131int hci_dev_open(__u16 dev)
1132{
1133 struct hci_dev *hdev;
1134 int ret = 0;
1135
5a08ecce
AE		 1136 hdev = hci_dev_get(dev);
1137 if (!hdev)
1da177e4
LT		 1138 return -ENODEV;
1139
1140 BT_DBG("%s %p", hdev->name, hdev);
1141
1142 hci_req_lock(hdev);
1143
94324962
JH		 1144 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1145 ret = -ENODEV;
1146 goto done;
1147 }
1148
611b30f7
MH		 1149 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
1150 ret = -ERFKILL;
1151 goto done;
1152 }
1153
1da177e4
LT		 1154 if (test_bit(HCI_UP, &hdev->flags)) {
1155 ret = -EALREADY;
1156 goto done;
1157 }
1158
1da177e4
LT		 1159 if (hdev->open(hdev)) {
1160 ret = -EIO;
1161 goto done;
1162 }
1163
f41c70c4
MH		 1164 atomic_set(&hdev->cmd_cnt, 1);
1165 set_bit(HCI_INIT, &hdev->flags);
1166
1167 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1168 ret = hdev->setup(hdev);
1169
1170 if (!ret) {
1171 /* Treat all non BR/EDR controllers as raw devices if
1172 * enable_hs is not set.
1173 */
1174 if (hdev->dev_type != HCI_BREDR && !enable_hs)
1175 set_bit(HCI_RAW, &hdev->flags);
1176
1177 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1178 set_bit(HCI_RAW, &hdev->flags);
1179
1180 if (!test_bit(HCI_RAW, &hdev->flags))
1181 ret = __hci_init(hdev);
1da177e4
LT		 1182 }
1183
f41c70c4
MH		 1184 clear_bit(HCI_INIT, &hdev->flags);
1185
1da177e4
LT		 1186 if (!ret) {
1187 hci_dev_hold(hdev);
1188 set_bit(HCI_UP, &hdev->flags);
1189 hci_notify(hdev, HCI_DEV_UP);
bb4b2a9a
AE		 1190 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1191 mgmt_valid_hdev(hdev)) {
09fd0de5 1192 hci_dev_lock(hdev);
744cf19e 1193 mgmt_powered(hdev, 1);
09fd0de5 1194 hci_dev_unlock(hdev);
56e5cb86 1195 }
8e87d142 1196 } else {
1da177e4 1197 /* Init failed, cleanup */
3eff45ea 1198 flush_work(&hdev->tx_work);
c347b765 1199 flush_work(&hdev->cmd_work);
b78752cc 1200 flush_work(&hdev->rx_work);
1da177e4
LT		 1201
1202 skb_queue_purge(&hdev->cmd_q);
1203 skb_queue_purge(&hdev->rx_q);
1204
1205 if (hdev->flush)
1206 hdev->flush(hdev);
1207
1208 if (hdev->sent_cmd) {
1209 kfree_skb(hdev->sent_cmd);
1210 hdev->sent_cmd = NULL;
1211 }
1212
1213 hdev->close(hdev);
1214 hdev->flags = 0;
1215 }
1216
1217done:
1218 hci_req_unlock(hdev);
1219 hci_dev_put(hdev);
1220 return ret;
1221}
1222
1223static int hci_dev_do_close(struct hci_dev *hdev)
1224{
1225 BT_DBG("%s %p", hdev->name, hdev);
1226
78c04c0b
VCG		 1227 cancel_delayed_work(&hdev->power_off);
1228
1da177e4
LT		 1229 hci_req_cancel(hdev, ENODEV);
1230 hci_req_lock(hdev);
1231
1232 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1233 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1234 hci_req_unlock(hdev);
1235 return 0;
1236 }
1237
3eff45ea
GP		 1238 /* Flush RX and TX works */
1239 flush_work(&hdev->tx_work);
b78752cc 1240 flush_work(&hdev->rx_work);
1da177e4 1241
16ab91ab 1242 if (hdev->discov_timeout > 0) {
e0f9309f 1243 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1244 hdev->discov_timeout = 0;
5e5282bb 1245 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1246 }
1247
a8b2d5c2 1248 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1249 cancel_delayed_work(&hdev->service_cache);
1250
7ba8b4be
AG		 1251 cancel_delayed_work_sync(&hdev->le_scan_disable);
1252
09fd0de5 1253 hci_dev_lock(hdev);
1f9b9a5d 1254 hci_inquiry_cache_flush(hdev);
1da177e4 1255 hci_conn_hash_flush(hdev);
09fd0de5 1256 hci_dev_unlock(hdev);
1da177e4
LT		 1257
1258 hci_notify(hdev, HCI_DEV_DOWN);
1259
1260 if (hdev->flush)
1261 hdev->flush(hdev);
1262
1263 /* Reset device */
1264 skb_queue_purge(&hdev->cmd_q);
1265 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1266 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1267 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1268 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1269 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1270 clear_bit(HCI_INIT, &hdev->flags);
1271 }
1272
c347b765
GP		 1273 /* flush cmd work */
1274 flush_work(&hdev->cmd_work);
1da177e4
LT		 1275
1276 /* Drop queues */
1277 skb_queue_purge(&hdev->rx_q);
1278 skb_queue_purge(&hdev->cmd_q);
1279 skb_queue_purge(&hdev->raw_q);
1280
1281 /* Drop last sent command */
1282 if (hdev->sent_cmd) {
b79f44c1 1283 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1284 kfree_skb(hdev->sent_cmd);
1285 hdev->sent_cmd = NULL;
1286 }
1287
b6ddb638
JH		 1288 kfree_skb(hdev->recv_evt);
1289 hdev->recv_evt = NULL;
1290
1da177e4
LT		 1291 /* After this point our queues are empty
1292 * and no tasks are scheduled. */
1293 hdev->close(hdev);
1294
35b973c9
JH		 1295 /* Clear flags */
1296 hdev->flags = 0;
1297 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1298
bb4b2a9a
AE		 1299 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1300 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 1301 hci_dev_lock(hdev);
1302 mgmt_powered(hdev, 0);
1303 hci_dev_unlock(hdev);
1304 }
5add6af8 1305
ced5c338
AE		 1306 /* Controller radio is available but is currently powered down */
1307 hdev->amp_status = 0;
1308
e59fda8d 1309 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1310 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1311
1da177e4
LT		 1312 hci_req_unlock(hdev);
1313
1314 hci_dev_put(hdev);
1315 return 0;
1316}
1317
1318int hci_dev_close(__u16 dev)
1319{
1320 struct hci_dev *hdev;
1321 int err;
1322
70f23020
AE		 1323 hdev = hci_dev_get(dev);
1324 if (!hdev)
1da177e4 1325 return -ENODEV;
8ee56540
MH		 1326
1327 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1328 cancel_delayed_work(&hdev->power_off);
1329
1da177e4 1330 err = hci_dev_do_close(hdev);
8ee56540 1331
1da177e4
LT		 1332 hci_dev_put(hdev);
1333 return err;
1334}
1335
1336int hci_dev_reset(__u16 dev)
1337{
1338 struct hci_dev *hdev;
1339 int ret = 0;
1340
70f23020
AE		 1341 hdev = hci_dev_get(dev);
1342 if (!hdev)
1da177e4
LT		 1343 return -ENODEV;
1344
1345 hci_req_lock(hdev);
1da177e4
LT		 1346
1347 if (!test_bit(HCI_UP, &hdev->flags))
1348 goto done;
1349
1350 /* Drop queues */
1351 skb_queue_purge(&hdev->rx_q);
1352 skb_queue_purge(&hdev->cmd_q);
1353
09fd0de5 1354 hci_dev_lock(hdev);
1f9b9a5d 1355 hci_inquiry_cache_flush(hdev);
1da177e4 1356 hci_conn_hash_flush(hdev);
09fd0de5 1357 hci_dev_unlock(hdev);
1da177e4
LT		 1358
1359 if (hdev->flush)
1360 hdev->flush(hdev);
1361
8e87d142 1362 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1363 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1364
1365 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1366 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1367
1368done:
1da177e4
LT		 1369 hci_req_unlock(hdev);
1370 hci_dev_put(hdev);
1371 return ret;
1372}
1373
1374int hci_dev_reset_stat(__u16 dev)
1375{
1376 struct hci_dev *hdev;
1377 int ret = 0;
1378
70f23020
AE		 1379 hdev = hci_dev_get(dev);
1380 if (!hdev)
1da177e4
LT		 1381 return -ENODEV;
1382
1383 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1384
1385 hci_dev_put(hdev);
1386
1387 return ret;
1388}
1389
1390int hci_dev_cmd(unsigned int cmd, void __user *arg)
1391{
1392 struct hci_dev *hdev;
1393 struct hci_dev_req dr;
1394 int err = 0;
1395
1396 if (copy_from_user(&dr, arg, sizeof(dr)))
1397 return -EFAULT;
1398
70f23020
AE		 1399 hdev = hci_dev_get(dr.dev_id);
1400 if (!hdev)
1da177e4
LT		 1401 return -ENODEV;
1402
1403 switch (cmd) {
1404 case HCISETAUTH:
01178cd4
JH		 1405 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1406 HCI_INIT_TIMEOUT);
1da177e4
LT		 1407 break;
1408
1409 case HCISETENCRYPT:
1410 if (!lmp_encrypt_capable(hdev)) {
1411 err = -EOPNOTSUPP;
1412 break;
1413 }
1414
1415 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1416 /* Auth must be enabled first */
01178cd4
JH		 1417 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1418 HCI_INIT_TIMEOUT);
1da177e4
LT		 1419 if (err)
1420 break;
1421 }
1422
01178cd4
JH		 1423 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1424 HCI_INIT_TIMEOUT);
1da177e4
LT		 1425 break;
1426
1427 case HCISETSCAN:
01178cd4
JH		 1428 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1429 HCI_INIT_TIMEOUT);
1da177e4
LT		 1430 break;
1431
1da177e4 1432 case HCISETLINKPOL:
01178cd4
JH		 1433 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1434 HCI_INIT_TIMEOUT);
1da177e4
LT		 1435 break;
1436
1437 case HCISETLINKMODE:
e4e8e37c
MH		 1438 hdev->link_mode = ((__u16) dr.dev_opt) &
1439 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1440 break;
1441
1442 case HCISETPTYPE:
1443 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1444 break;
1445
1446 case HCISETACLMTU:
e4e8e37c
MH		 1447 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1448 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1449 break;
1450
1451 case HCISETSCOMTU:
e4e8e37c
MH		 1452 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1453 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1454 break;
1455
1456 default:
1457 err = -EINVAL;
1458 break;
1459 }
e4e8e37c 1460
1da177e4
LT		 1461 hci_dev_put(hdev);
1462 return err;
1463}
1464
1465int hci_get_dev_list(void __user *arg)
1466{
8035ded4 1467 struct hci_dev *hdev;
1da177e4
LT		 1468 struct hci_dev_list_req *dl;
1469 struct hci_dev_req *dr;
1da177e4
LT		 1470 int n = 0, size, err;
1471 __u16 dev_num;
1472
1473 if (get_user(dev_num, (__u16 __user *) arg))
1474 return -EFAULT;
1475
1476 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1477 return -EINVAL;
1478
1479 size = sizeof(*dl) + dev_num * sizeof(*dr);
1480
70f23020
AE		 1481 dl = kzalloc(size, GFP_KERNEL);
1482 if (!dl)
1da177e4
LT		 1483 return -ENOMEM;
1484
1485 dr = dl->dev_req;
1486
f20d09d5 1487 read_lock(&hci_dev_list_lock);
8035ded4 1488 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1489 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1490 cancel_delayed_work(&hdev->power_off);
c542a06c 1491
a8b2d5c2
JH		 1492 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1493 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1494
1da177e4
LT		 1495 (dr + n)->dev_id = hdev->id;
1496 (dr + n)->dev_opt = hdev->flags;
c542a06c 1497
1da177e4
LT		 1498 if (++n >= dev_num)
1499 break;
1500 }
f20d09d5 1501 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1502
1503 dl->dev_num = n;
1504 size = sizeof(*dl) + n * sizeof(*dr);
1505
1506 err = copy_to_user(arg, dl, size);
1507 kfree(dl);
1508
1509 return err ? -EFAULT : 0;
1510}
1511
1512int hci_get_dev_info(void __user *arg)
1513{
1514 struct hci_dev *hdev;
1515 struct hci_dev_info di;
1516 int err = 0;
1517
1518 if (copy_from_user(&di, arg, sizeof(di)))
1519 return -EFAULT;
1520
70f23020
AE		 1521 hdev = hci_dev_get(di.dev_id);
1522 if (!hdev)
1da177e4
LT		 1523 return -ENODEV;
1524
a8b2d5c2 1525 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1526 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1527
a8b2d5c2
JH		 1528 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1529 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1530
1da177e4
LT		 1531 strcpy(di.name, hdev->name);
1532 di.bdaddr = hdev->bdaddr;
943da25d 1533 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1534 di.flags = hdev->flags;
1535 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1536 if (lmp_bredr_capable(hdev)) {
1537 di.acl_mtu = hdev->acl_mtu;
1538 di.acl_pkts = hdev->acl_pkts;
1539 di.sco_mtu = hdev->sco_mtu;
1540 di.sco_pkts = hdev->sco_pkts;
1541 } else {
1542 di.acl_mtu = hdev->le_mtu;
1543 di.acl_pkts = hdev->le_pkts;
1544 di.sco_mtu = 0;
1545 di.sco_pkts = 0;
1546 }
1da177e4
LT		 1547 di.link_policy = hdev->link_policy;
1548 di.link_mode = hdev->link_mode;
1549
1550 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1551 memcpy(&di.features, &hdev->features, sizeof(di.features));
1552
1553 if (copy_to_user(arg, &di, sizeof(di)))
1554 err = -EFAULT;
1555
1556 hci_dev_put(hdev);
1557
1558 return err;
1559}
1560
1561/* ---- Interface to HCI drivers ---- */
1562
611b30f7
MH		 1563static int hci_rfkill_set_block(void *data, bool blocked)
1564{
1565 struct hci_dev *hdev = data;
1566
1567 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1568
1569 if (!blocked)
1570 return 0;
1571
1572 hci_dev_do_close(hdev);
1573
1574 return 0;
1575}
1576
1577static const struct rfkill_ops hci_rfkill_ops = {
1578 .set_block = hci_rfkill_set_block,
1579};
1580
ab81cbf9
JH		 1581static void hci_power_on(struct work_struct *work)
1582{
1583 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 1584 int err;
ab81cbf9
JH		 1585
1586 BT_DBG("%s", hdev->name);
1587
96570ffc
JH		 1588 err = hci_dev_open(hdev->id);
1589 if (err < 0) {
1590 mgmt_set_powered_failed(hdev, err);
ab81cbf9 1591 return;
96570ffc 1592 }
ab81cbf9 1593
a8b2d5c2 1594 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1595 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1596 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1597
a8b2d5c2 1598 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1599 mgmt_index_added(hdev);
ab81cbf9
JH		 1600}
1601
1602static void hci_power_off(struct work_struct *work)
1603{
3243553f 1604 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1605 power_off.work);
ab81cbf9
JH		 1606
1607 BT_DBG("%s", hdev->name);
1608
8ee56540 1609 hci_dev_do_close(hdev);
ab81cbf9
JH		 1610}
1611
16ab91ab
JH		 1612static void hci_discov_off(struct work_struct *work)
1613{
1614 struct hci_dev *hdev;
1615 u8 scan = SCAN_PAGE;
1616
1617 hdev = container_of(work, struct hci_dev, discov_off.work);
1618
1619 BT_DBG("%s", hdev->name);
1620
09fd0de5 1621 hci_dev_lock(hdev);
16ab91ab
JH		 1622
1623 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1624
1625 hdev->discov_timeout = 0;
1626
09fd0de5 1627 hci_dev_unlock(hdev);
16ab91ab
JH		 1628}
1629
2aeb9a1a
JH		 1630int hci_uuids_clear(struct hci_dev *hdev)
1631{
4821002c 1632 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1633
4821002c
JH		 1634 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1635 list_del(&uuid->list);
2aeb9a1a
JH		 1636 kfree(uuid);
1637 }
1638
1639 return 0;
1640}
1641
55ed8ca1
JH		 1642int hci_link_keys_clear(struct hci_dev *hdev)
1643{
1644 struct list_head *p, *n;
1645
1646 list_for_each_safe(p, n, &hdev->link_keys) {
1647 struct link_key *key;
1648
1649 key = list_entry(p, struct link_key, list);
1650
1651 list_del(p);
1652 kfree(key);
1653 }
1654
1655 return 0;
1656}
1657
b899efaf
VCG		 1658int hci_smp_ltks_clear(struct hci_dev *hdev)
1659{
1660 struct smp_ltk *k, *tmp;
1661
1662 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1663 list_del(&k->list);
1664 kfree(k);
1665 }
1666
1667 return 0;
1668}
1669
55ed8ca1
JH		 1670struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1671{
8035ded4 1672 struct link_key *k;
55ed8ca1 1673
8035ded4 1674 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1675 if (bacmp(bdaddr, &k->bdaddr) == 0)
1676 return k;
55ed8ca1
JH		 1677
1678 return NULL;
1679}
1680
745c0ce3 1681static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1682 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1683{
1684 /* Legacy key */
1685 if (key_type < 0x03)
745c0ce3 1686 return true;
d25e28ab
JH		 1687
1688 /* Debug keys are insecure so don't store them persistently */
1689 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1690 return false;
d25e28ab
JH		 1691
1692 /* Changed combination key and there's no previous one */
1693 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1694 return false;
d25e28ab
JH		 1695
1696 /* Security mode 3 case */
1697 if (!conn)
745c0ce3 1698 return true;
d25e28ab
JH		 1699
1700 /* Neither local nor remote side had no-bonding as requirement */
1701 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1702 return true;
d25e28ab
JH		 1703
1704 /* Local side had dedicated bonding as requirement */
1705 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1706 return true;
d25e28ab
JH		 1707
1708 /* Remote side had dedicated bonding as requirement */
1709 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1710 return true;
d25e28ab
JH		 1711
1712 /* If none of the above criteria match, then don't store the key
1713 * persistently */
745c0ce3 1714 return false;
d25e28ab
JH		 1715}
1716
c9839a11 1717struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1718{
c9839a11 1719 struct smp_ltk *k;
75d262c2 1720
c9839a11
VCG		 1721 list_for_each_entry(k, &hdev->long_term_keys, list) {
1722 if (k->ediv != ediv ||
a8c5fb1a 1723 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1724 continue;
1725
c9839a11 1726 return k;
75d262c2
VCG		 1727 }
1728
1729 return NULL;
1730}
75d262c2 1731
c9839a11 1732struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1733 u8 addr_type)
75d262c2 1734{
c9839a11 1735 struct smp_ltk *k;
75d262c2 1736
c9839a11
VCG		 1737 list_for_each_entry(k, &hdev->long_term_keys, list)
1738 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1739 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1740 return k;
1741
1742 return NULL;
1743}
75d262c2 1744
d25e28ab 1745int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1746 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1747{
1748 struct link_key *key, *old_key;
745c0ce3
VA		 1749 u8 old_key_type;
1750 bool persistent;
55ed8ca1
JH		 1751
1752 old_key = hci_find_link_key(hdev, bdaddr);
1753 if (old_key) {
1754 old_key_type = old_key->type;
1755 key = old_key;
1756 } else {
12adcf3a 1757 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1758 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1759 if (!key)
1760 return -ENOMEM;
1761 list_add(&key->list, &hdev->link_keys);
1762 }
1763
6ed93dc6 1764 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1765
d25e28ab
JH		 1766 /* Some buggy controller combinations generate a changed
1767 * combination key for legacy pairing even when there's no
1768 * previous key */
1769 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1770 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1771 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1772 if (conn)
1773 conn->key_type = type;
1774 }
d25e28ab 1775
55ed8ca1 1776 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1777 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1778 key->pin_len = pin_len;
1779
b6020ba0 1780 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1781 key->type = old_key_type;
4748fed2
JH		 1782 else
1783 key->type = type;
1784
4df378a1
JH		 1785 if (!new_key)
1786 return 0;
1787
1788 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1789
744cf19e 1790 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1791
6ec5bcad
VA		 1792 if (conn)
1793 conn->flush_key = !persistent;
55ed8ca1
JH		 1794
1795 return 0;
1796}
1797
c9839a11 1798int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1799 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1800 ediv, u8 rand[8])
75d262c2 1801{
c9839a11 1802 struct smp_ltk *key, *old_key;
75d262c2 1803
c9839a11
VCG		 1804 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1805 return 0;
75d262c2 1806
c9839a11
VCG		 1807 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1808 if (old_key)
75d262c2 1809 key = old_key;
c9839a11
VCG		 1810 else {
1811 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1812 if (!key)
1813 return -ENOMEM;
c9839a11 1814 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1815 }
1816
75d262c2 1817 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1818 key->bdaddr_type = addr_type;
1819 memcpy(key->val, tk, sizeof(key->val));
1820 key->authenticated = authenticated;
1821 key->ediv = ediv;
1822 key->enc_size = enc_size;
1823 key->type = type;
1824 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1825
c9839a11
VCG		 1826 if (!new_key)
1827 return 0;
75d262c2 1828
261cc5aa
VCG		 1829 if (type & HCI_SMP_LTK)
1830 mgmt_new_ltk(hdev, key, 1);
1831
75d262c2
VCG		 1832 return 0;
1833}
1834
55ed8ca1
JH		 1835int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1836{
1837 struct link_key *key;
1838
1839 key = hci_find_link_key(hdev, bdaddr);
1840 if (!key)
1841 return -ENOENT;
1842
6ed93dc6 1843 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1844
1845 list_del(&key->list);
1846 kfree(key);
1847
1848 return 0;
1849}
1850
b899efaf
VCG		 1851int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1852{
1853 struct smp_ltk *k, *tmp;
1854
1855 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1856 if (bacmp(bdaddr, &k->bdaddr))
1857 continue;
1858
6ed93dc6 1859 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1860
1861 list_del(&k->list);
1862 kfree(k);
1863 }
1864
1865 return 0;
1866}
1867
6bd32326 1868/* HCI command timer function */
bda4f23a 1869static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1870{
1871 struct hci_dev *hdev = (void *) arg;
1872
bda4f23a
AE		 1873 if (hdev->sent_cmd) {
1874 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1875 u16 opcode = __le16_to_cpu(sent->opcode);
1876
1877 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1878 } else {
1879 BT_ERR("%s command tx timeout", hdev->name);
1880 }
1881
6bd32326 1882 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1883 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1884}
1885
2763eda6 1886struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1887 bdaddr_t *bdaddr)
2763eda6
SJ		 1888{
1889 struct oob_data *data;
1890
1891 list_for_each_entry(data, &hdev->remote_oob_data, list)
1892 if (bacmp(bdaddr, &data->bdaddr) == 0)
1893 return data;
1894
1895 return NULL;
1896}
1897
1898int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1899{
1900 struct oob_data *data;
1901
1902 data = hci_find_remote_oob_data(hdev, bdaddr);
1903 if (!data)
1904 return -ENOENT;
1905
6ed93dc6 1906 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1907
1908 list_del(&data->list);
1909 kfree(data);
1910
1911 return 0;
1912}
1913
1914int hci_remote_oob_data_clear(struct hci_dev *hdev)
1915{
1916 struct oob_data *data, *n;
1917
1918 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1919 list_del(&data->list);
1920 kfree(data);
1921 }
1922
1923 return 0;
1924}
1925
1926int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1927 u8 *randomizer)
2763eda6
SJ		 1928{
1929 struct oob_data *data;
1930
1931 data = hci_find_remote_oob_data(hdev, bdaddr);
1932
1933 if (!data) {
1934 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1935 if (!data)
1936 return -ENOMEM;
1937
1938 bacpy(&data->bdaddr, bdaddr);
1939 list_add(&data->list, &hdev->remote_oob_data);
1940 }
1941
1942 memcpy(data->hash, hash, sizeof(data->hash));
1943 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1944
6ed93dc6 1945 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1946
1947 return 0;
1948}
1949
04124681 1950struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1951{
8035ded4 1952 struct bdaddr_list *b;
b2a66aad 1953
8035ded4 1954 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1955 if (bacmp(bdaddr, &b->bdaddr) == 0)
1956 return b;
b2a66aad
AJ		 1957
1958 return NULL;
1959}
1960
1961int hci_blacklist_clear(struct hci_dev *hdev)
1962{
1963 struct list_head *p, *n;
1964
1965 list_for_each_safe(p, n, &hdev->blacklist) {
1966 struct bdaddr_list *b;
1967
1968 b = list_entry(p, struct bdaddr_list, list);
1969
1970 list_del(p);
1971 kfree(b);
1972 }
1973
1974 return 0;
1975}
1976
88c1fe4b 1977int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1978{
1979 struct bdaddr_list *entry;
b2a66aad
AJ		 1980
1981 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1982 return -EBADF;
1983
5e762444
AJ		 1984 if (hci_blacklist_lookup(hdev, bdaddr))
1985 return -EEXIST;
b2a66aad
AJ		 1986
1987 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1988 if (!entry)
1989 return -ENOMEM;
b2a66aad
AJ		 1990
1991 bacpy(&entry->bdaddr, bdaddr);
1992
1993 list_add(&entry->list, &hdev->blacklist);
1994
88c1fe4b 1995 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1996}
1997
88c1fe4b 1998int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1999{
2000 struct bdaddr_list *entry;
b2a66aad 2001
1ec918ce 2002 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 2003 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 2004
2005 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 2006 if (!entry)
5e762444 2007 return -ENOENT;
b2a66aad
AJ		 2008
2009 list_del(&entry->list);
2010 kfree(entry);
2011
88c1fe4b 2012 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 2013}
2014
4c87eaab 2015static void inquiry_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2016{
4c87eaab
AG		 2017 if (status) {
2018 BT_ERR("Failed to start inquiry: status %d", status);
7ba8b4be 2019
4c87eaab
AG		 2020 hci_dev_lock(hdev);
2021 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2022 hci_dev_unlock(hdev);
2023 return;
2024 }
7ba8b4be
AG		 2025}
2026
4c87eaab 2027static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status)
7ba8b4be 2028{
4c87eaab
AG		 2029 /* General inquiry access code (GIAC) */
2030 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2031 struct hci_request req;
2032 struct hci_cp_inquiry cp;
7ba8b4be
AG		 2033 int err;
2034
4c87eaab
AG		 2035 if (status) {
2036 BT_ERR("Failed to disable LE scanning: status %d", status);
2037 return;
2038 }
7ba8b4be 2039
4c87eaab
AG		 2040 switch (hdev->discovery.type) {
2041 case DISCOV_TYPE_LE:
2042 hci_dev_lock(hdev);
2043 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2044 hci_dev_unlock(hdev);
2045 break;
7ba8b4be 2046
4c87eaab
AG		 2047 case DISCOV_TYPE_INTERLEAVED:
2048 hci_req_init(&req, hdev);
7ba8b4be 2049
4c87eaab
AG		 2050 memset(&cp, 0, sizeof(cp));
2051 memcpy(&cp.lap, lap, sizeof(cp.lap));
2052 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2053 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
7ba8b4be 2054
4c87eaab 2055 hci_dev_lock(hdev);
7dbfac1d 2056
4c87eaab 2057 hci_inquiry_cache_flush(hdev);
7dbfac1d 2058
4c87eaab
AG		 2059 err = hci_req_run(&req, inquiry_complete);
2060 if (err) {
2061 BT_ERR("Inquiry request failed: err %d", err);
2062 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2063 }
7dbfac1d 2064
4c87eaab
AG		 2065 hci_dev_unlock(hdev);
2066 break;
7dbfac1d 2067 }
7dbfac1d
AG		 2068}
2069
7ba8b4be
AG		 2070static void le_scan_disable_work(struct work_struct *work)
2071{
2072 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 2073 le_scan_disable.work);
7ba8b4be 2074 struct hci_cp_le_set_scan_enable cp;
4c87eaab
AG		 2075 struct hci_request req;
2076 int err;
7ba8b4be
AG		 2077
2078 BT_DBG("%s", hdev->name);
2079
4c87eaab 2080 hci_req_init(&req, hdev);
28b75a89 2081
7ba8b4be 2082 memset(&cp, 0, sizeof(cp));
4c87eaab
AG		 2083 cp.enable = LE_SCAN_DISABLE;
2084 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
28b75a89 2085
4c87eaab
AG		 2086 err = hci_req_run(&req, le_scan_disable_work_complete);
2087 if (err)
2088 BT_ERR("Disable LE scanning request failed: err %d", err);
28b75a89
AG		 2089}
2090
9be0dab7
DH		 2091/* Alloc HCI device */
2092struct hci_dev *hci_alloc_dev(void)
2093{
2094 struct hci_dev *hdev;
2095
2096 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2097 if (!hdev)
2098 return NULL;
2099
b1b813d4
DH		 2100 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2101 hdev->esco_type = (ESCO_HV1);
2102 hdev->link_mode = (HCI_LM_ACCEPT);
2103 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 2104 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2105 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 2106
b1b813d4
DH		 2107 hdev->sniff_max_interval = 800;
2108 hdev->sniff_min_interval = 80;
2109
2110 mutex_init(&hdev->lock);
2111 mutex_init(&hdev->req_lock);
2112
2113 INIT_LIST_HEAD(&hdev->mgmt_pending);
2114 INIT_LIST_HEAD(&hdev->blacklist);
2115 INIT_LIST_HEAD(&hdev->uuids);
2116 INIT_LIST_HEAD(&hdev->link_keys);
2117 INIT_LIST_HEAD(&hdev->long_term_keys);
2118 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 2119 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2120
2121 INIT_WORK(&hdev->rx_work, hci_rx_work);
2122 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2123 INIT_WORK(&hdev->tx_work, hci_tx_work);
2124 INIT_WORK(&hdev->power_on, hci_power_on);
b1b813d4 2125
b1b813d4
DH		 2126 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2127 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2128 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2129
b1b813d4
DH		 2130 skb_queue_head_init(&hdev->rx_q);
2131 skb_queue_head_init(&hdev->cmd_q);
2132 skb_queue_head_init(&hdev->raw_q);
2133
2134 init_waitqueue_head(&hdev->req_wait_q);
2135
bda4f23a 2136 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2137
b1b813d4
DH		 2138 hci_init_sysfs(hdev);
2139 discovery_init(hdev);
9be0dab7
DH		 2140
2141 return hdev;
2142}
2143EXPORT_SYMBOL(hci_alloc_dev);
2144
2145/* Free HCI device */
2146void hci_free_dev(struct hci_dev *hdev)
2147{
9be0dab7
DH		 2148 /* will free via device release */
2149 put_device(&hdev->dev);
2150}
2151EXPORT_SYMBOL(hci_free_dev);
2152
1da177e4
LT		 2153/* Register HCI device */
2154int hci_register_dev(struct hci_dev *hdev)
2155{
b1b813d4 2156 int id, error;
1da177e4 2157
010666a1 2158 if (!hdev->open || !hdev->close)
1da177e4
LT		 2159 return -EINVAL;
2160
08add513
MM		 2161 /* Do not allow HCI_AMP devices to register at index 0,
2162 * so the index can be used as the AMP controller ID.
2163 */
3df92b31
SL		 2164 switch (hdev->dev_type) {
2165 case HCI_BREDR:
2166 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2167 break;
2168 case HCI_AMP:
2169 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2170 break;
2171 default:
2172 return -EINVAL;
1da177e4 2173 }
8e87d142 2174
3df92b31
SL		 2175 if (id < 0)
2176 return id;
2177
1da177e4
LT		 2178 sprintf(hdev->name, "hci%d", id);
2179 hdev->id = id;
2d8b3a11
AE		 2180
2181 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2182
d8537548
KC		 2183 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2184 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 2185 if (!hdev->workqueue) {
2186 error = -ENOMEM;
2187 goto err;
2188 }
f48fd9c8 2189
d8537548
KC		 2190 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
2191 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 2192 if (!hdev->req_workqueue) {
2193 destroy_workqueue(hdev->workqueue);
2194 error = -ENOMEM;
2195 goto err;
2196 }
2197
33ca954d
DH		 2198 error = hci_add_sysfs(hdev);
2199 if (error < 0)
2200 goto err_wqueue;
1da177e4 2201
611b30f7 2202 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2203 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2204 hdev);
611b30f7
MH		 2205 if (hdev->rfkill) {
2206 if (rfkill_register(hdev->rfkill) < 0) {
2207 rfkill_destroy(hdev->rfkill);
2208 hdev->rfkill = NULL;
2209 }
2210 }
2211
a8b2d5c2 2212 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 2213
2214 if (hdev->dev_type != HCI_AMP)
2215 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2216
fcee3377
GP		 2217 write_lock(&hci_dev_list_lock);
2218 list_add(&hdev->list, &hci_dev_list);
2219 write_unlock(&hci_dev_list_lock);
2220
1da177e4 2221 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2222 hci_dev_hold(hdev);
1da177e4 2223
19202573 2224 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2225
1da177e4 2226 return id;
f48fd9c8 2227
33ca954d
DH		 2228err_wqueue:
2229 destroy_workqueue(hdev->workqueue);
6ead1bbc 2230 destroy_workqueue(hdev->req_workqueue);
33ca954d 2231err:
3df92b31 2232 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 2233
33ca954d 2234 return error;
1da177e4
LT		 2235}
2236EXPORT_SYMBOL(hci_register_dev);
2237
2238/* Unregister HCI device */
59735631 2239void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2240{
3df92b31 2241 int i, id;
ef222013 2242
c13854ce 2243 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2244
94324962
JH		 2245 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2246
3df92b31
SL		 2247 id = hdev->id;
2248
f20d09d5 2249 write_lock(&hci_dev_list_lock);
1da177e4 2250 list_del(&hdev->list);
f20d09d5 2251 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2252
2253 hci_dev_do_close(hdev);
2254
cd4c5391 2255 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2256 kfree_skb(hdev->reassembly[i]);
2257
b9b5ef18
GP		 2258 cancel_work_sync(&hdev->power_on);
2259
ab81cbf9 2260 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2261 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2262 hci_dev_lock(hdev);
744cf19e 2263 mgmt_index_removed(hdev);
09fd0de5 2264 hci_dev_unlock(hdev);
56e5cb86 2265 }
ab81cbf9 2266
2e58ef3e
JH		 2267 /* mgmt_index_removed should take care of emptying the
2268 * pending list */
2269 BUG_ON(!list_empty(&hdev->mgmt_pending));
2270
1da177e4
LT		 2271 hci_notify(hdev, HCI_DEV_UNREG);
2272
611b30f7
MH		 2273 if (hdev->rfkill) {
2274 rfkill_unregister(hdev->rfkill);
2275 rfkill_destroy(hdev->rfkill);
2276 }
2277
ce242970 2278 hci_del_sysfs(hdev);
147e2d59 2279
f48fd9c8 2280 destroy_workqueue(hdev->workqueue);
6ead1bbc 2281 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2282
09fd0de5 2283 hci_dev_lock(hdev);
e2e0cacb 2284 hci_blacklist_clear(hdev);
2aeb9a1a 2285 hci_uuids_clear(hdev);
55ed8ca1 2286 hci_link_keys_clear(hdev);
b899efaf 2287 hci_smp_ltks_clear(hdev);
2763eda6 2288 hci_remote_oob_data_clear(hdev);
09fd0de5 2289 hci_dev_unlock(hdev);
e2e0cacb 2290
dc946bd8 2291 hci_dev_put(hdev);
3df92b31
SL		 2292
2293 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2294}
2295EXPORT_SYMBOL(hci_unregister_dev);
2296
2297/* Suspend HCI device */
2298int hci_suspend_dev(struct hci_dev *hdev)
2299{
2300 hci_notify(hdev, HCI_DEV_SUSPEND);
2301 return 0;
2302}
2303EXPORT_SYMBOL(hci_suspend_dev);
2304
2305/* Resume HCI device */
2306int hci_resume_dev(struct hci_dev *hdev)
2307{
2308 hci_notify(hdev, HCI_DEV_RESUME);
2309 return 0;
2310}
2311EXPORT_SYMBOL(hci_resume_dev);
2312
76bca880
MH		 2313/* Receive frame from HCI drivers */
2314int hci_recv_frame(struct sk_buff *skb)
2315{
2316 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2317 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2318 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2319 kfree_skb(skb);
2320 return -ENXIO;
2321 }
2322
d82603c6 2323 /* Incoming skb */
76bca880
MH		 2324 bt_cb(skb)->incoming = 1;
2325
2326 /* Time stamp */
2327 __net_timestamp(skb);
2328
76bca880 2329 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2330 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2331
76bca880
MH		 2332 return 0;
2333}
2334EXPORT_SYMBOL(hci_recv_frame);
2335
33e882a5 2336static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2337 int count, __u8 index)
33e882a5
SS		 2338{
2339 int len = 0;
2340 int hlen = 0;
2341 int remain = count;
2342 struct sk_buff *skb;
2343 struct bt_skb_cb *scb;
2344
2345 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2346 index >= NUM_REASSEMBLY)
33e882a5
SS		 2347 return -EILSEQ;
2348
2349 skb = hdev->reassembly[index];
2350
2351 if (!skb) {
2352 switch (type) {
2353 case HCI_ACLDATA_PKT:
2354 len = HCI_MAX_FRAME_SIZE;
2355 hlen = HCI_ACL_HDR_SIZE;
2356 break;
2357 case HCI_EVENT_PKT:
2358 len = HCI_MAX_EVENT_SIZE;
2359 hlen = HCI_EVENT_HDR_SIZE;
2360 break;
2361 case HCI_SCODATA_PKT:
2362 len = HCI_MAX_SCO_SIZE;
2363 hlen = HCI_SCO_HDR_SIZE;
2364 break;
2365 }
2366
1e429f38 2367 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2368 if (!skb)
2369 return -ENOMEM;
2370
2371 scb = (void *) skb->cb;
2372 scb->expect = hlen;
2373 scb->pkt_type = type;
2374
2375 skb->dev = (void *) hdev;
2376 hdev->reassembly[index] = skb;
2377 }
2378
2379 while (count) {
2380 scb = (void *) skb->cb;
89bb46d0 2381 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2382
2383 memcpy(skb_put(skb, len), data, len);
2384
2385 count -= len;
2386 data += len;
2387 scb->expect -= len;
2388 remain = count;
2389
2390 switch (type) {
2391 case HCI_EVENT_PKT:
2392 if (skb->len == HCI_EVENT_HDR_SIZE) {
2393 struct hci_event_hdr *h = hci_event_hdr(skb);
2394 scb->expect = h->plen;
2395
2396 if (skb_tailroom(skb) < scb->expect) {
2397 kfree_skb(skb);
2398 hdev->reassembly[index] = NULL;
2399 return -ENOMEM;
2400 }
2401 }
2402 break;
2403
2404 case HCI_ACLDATA_PKT:
2405 if (skb->len == HCI_ACL_HDR_SIZE) {
2406 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2407 scb->expect = __le16_to_cpu(h->dlen);
2408
2409 if (skb_tailroom(skb) < scb->expect) {
2410 kfree_skb(skb);
2411 hdev->reassembly[index] = NULL;
2412 return -ENOMEM;
2413 }
2414 }
2415 break;
2416
2417 case HCI_SCODATA_PKT:
2418 if (skb->len == HCI_SCO_HDR_SIZE) {
2419 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2420 scb->expect = h->dlen;
2421
2422 if (skb_tailroom(skb) < scb->expect) {
2423 kfree_skb(skb);
2424 hdev->reassembly[index] = NULL;
2425 return -ENOMEM;
2426 }
2427 }
2428 break;
2429 }
2430
2431 if (scb->expect == 0) {
2432 /* Complete frame */
2433
2434 bt_cb(skb)->pkt_type = type;
2435 hci_recv_frame(skb);
2436
2437 hdev->reassembly[index] = NULL;
2438 return remain;
2439 }
2440 }
2441
2442 return remain;
2443}
2444
ef222013
MH		 2445int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2446{
f39a3c06
SS		 2447 int rem = 0;
2448
ef222013
MH		 2449 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2450 return -EILSEQ;
2451
da5f6c37 2452 while (count) {
1e429f38 2453 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2454 if (rem < 0)
2455 return rem;
ef222013 2456
f39a3c06
SS		 2457 data += (count - rem);
2458 count = rem;
f81c6224 2459 }
ef222013 2460
f39a3c06 2461 return rem;
ef222013
MH		 2462}
2463EXPORT_SYMBOL(hci_recv_fragment);
2464
99811510
SS		 2465#define STREAM_REASSEMBLY 0
2466
2467int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2468{
2469 int type;
2470 int rem = 0;
2471
da5f6c37 2472 while (count) {
99811510
SS		 2473 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2474
2475 if (!skb) {
2476 struct { char type; } *pkt;
2477
2478 /* Start of the frame */
2479 pkt = data;
2480 type = pkt->type;
2481
2482 data++;
2483 count--;
2484 } else
2485 type = bt_cb(skb)->pkt_type;
2486
1e429f38 2487 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2488 STREAM_REASSEMBLY);
99811510
SS		 2489 if (rem < 0)
2490 return rem;
2491
2492 data += (count - rem);
2493 count = rem;
f81c6224 2494 }
99811510
SS		 2495
2496 return rem;
2497}
2498EXPORT_SYMBOL(hci_recv_stream_fragment);
2499
1da177e4
LT		 2500/* ---- Interface to upper protocols ---- */
2501
1da177e4
LT		 2502int hci_register_cb(struct hci_cb *cb)
2503{
2504 BT_DBG("%p name %s", cb, cb->name);
2505
f20d09d5 2506 write_lock(&hci_cb_list_lock);
1da177e4 2507 list_add(&cb->list, &hci_cb_list);
f20d09d5 2508 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2509
2510 return 0;
2511}
2512EXPORT_SYMBOL(hci_register_cb);
2513
2514int hci_unregister_cb(struct hci_cb *cb)
2515{
2516 BT_DBG("%p name %s", cb, cb->name);
2517
f20d09d5 2518 write_lock(&hci_cb_list_lock);
1da177e4 2519 list_del(&cb->list);
f20d09d5 2520 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2521
2522 return 0;
2523}
2524EXPORT_SYMBOL(hci_unregister_cb);
2525
2526static int hci_send_frame(struct sk_buff *skb)
2527{
2528 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2529
2530 if (!hdev) {
2531 kfree_skb(skb);
2532 return -ENODEV;
2533 }
2534
0d48d939 2535 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2536
cd82e61c
MH		 2537 /* Time stamp */
2538 __net_timestamp(skb);
1da177e4 2539
cd82e61c
MH		 2540 /* Send copy to monitor */
2541 hci_send_to_monitor(hdev, skb);
2542
2543 if (atomic_read(&hdev->promisc)) {
2544 /* Send copy to the sockets */
470fe1b5 2545 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2546 }
2547
2548 /* Get rid of skb owner, prior to sending to the driver. */
2549 skb_orphan(skb);
2550
2551 return hdev->send(skb);
2552}
2553
3119ae95
JH		 2554void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2555{
2556 skb_queue_head_init(&req->cmd_q);
2557 req->hdev = hdev;
5d73e034 2558 req->err = 0;
3119ae95
JH		 2559}
2560
2561int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2562{
2563 struct hci_dev *hdev = req->hdev;
2564 struct sk_buff *skb;
2565 unsigned long flags;
2566
2567 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2568
5d73e034
AG		 2569 /* If an error occured during request building, remove all HCI
2570 * commands queued on the HCI request queue.
2571 */
2572 if (req->err) {
2573 skb_queue_purge(&req->cmd_q);
2574 return req->err;
2575 }
2576
3119ae95
JH		 2577 /* Do not allow empty requests */
2578 if (skb_queue_empty(&req->cmd_q))
382b0c39 2579 return -ENODATA;
3119ae95
JH		 2580
2581 skb = skb_peek_tail(&req->cmd_q);
2582 bt_cb(skb)->req.complete = complete;
2583
2584 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2585 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2586 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2587
2588 queue_work(hdev->workqueue, &hdev->cmd_work);
2589
2590 return 0;
2591}
2592
1ca3a9d0 2593static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
07dc93dd 2594 u32 plen, const void *param)
1da177e4
LT		 2595{
2596 int len = HCI_COMMAND_HDR_SIZE + plen;
2597 struct hci_command_hdr *hdr;
2598 struct sk_buff *skb;
2599
1da177e4 2600 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2601 if (!skb)
2602 return NULL;
1da177e4
LT		 2603
2604 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2605 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2606 hdr->plen = plen;
2607
2608 if (plen)
2609 memcpy(skb_put(skb, plen), param, plen);
2610
2611 BT_DBG("skb len %d", skb->len);
2612
0d48d939 2613 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2614 skb->dev = (void *) hdev;
c78ae283 2615
1ca3a9d0
JH		 2616 return skb;
2617}
2618
2619/* Send HCI command */
07dc93dd
JH		 2620int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2621 const void *param)
1ca3a9d0
JH		 2622{
2623 struct sk_buff *skb;
2624
2625 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2626
2627 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2628 if (!skb) {
2629 BT_ERR("%s no memory for command", hdev->name);
2630 return -ENOMEM;
2631 }
2632
11714b3d
JH		 2633 /* Stand-alone HCI commands must be flaged as
2634 * single-command requests.
2635 */
2636 bt_cb(skb)->req.start = true;
2637
1da177e4 2638 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2639 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2640
2641 return 0;
2642}
1da177e4 2643
71c76a17 2644/* Queue a command to an asynchronous HCI request */
07dc93dd
JH		 2645void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2646 const void *param, u8 event)
71c76a17
JH		 2647{
2648 struct hci_dev *hdev = req->hdev;
2649 struct sk_buff *skb;
2650
2651 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2652
34739c1e
AG		 2653 /* If an error occured during request building, there is no point in
2654 * queueing the HCI command. We can simply return.
2655 */
2656 if (req->err)
2657 return;
2658
71c76a17
JH		 2659 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2660 if (!skb) {
5d73e034
AG		 2661 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2662 hdev->name, opcode);
2663 req->err = -ENOMEM;
e348fe6b 2664 return;
71c76a17
JH		 2665 }
2666
2667 if (skb_queue_empty(&req->cmd_q))
2668 bt_cb(skb)->req.start = true;
2669
02350a72
JH		 2670 bt_cb(skb)->req.event = event;
2671
71c76a17 2672 skb_queue_tail(&req->cmd_q, skb);
71c76a17
JH		 2673}
2674
07dc93dd
JH		 2675void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2676 const void *param)
02350a72
JH		 2677{
2678 hci_req_add_ev(req, opcode, plen, param, 0);
2679}
2680
1da177e4 2681/* Get data from the previously sent command */
a9de9248 2682void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2683{
2684 struct hci_command_hdr *hdr;
2685
2686 if (!hdev->sent_cmd)
2687 return NULL;
2688
2689 hdr = (void *) hdev->sent_cmd->data;
2690
a9de9248 2691 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2692 return NULL;
2693
f0e09510 2694 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2695
2696 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2697}
2698
2699/* Send ACL data */
2700static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2701{
2702 struct hci_acl_hdr *hdr;
2703 int len = skb->len;
2704
badff6d0
ACM		 2705 skb_push(skb, HCI_ACL_HDR_SIZE);
2706 skb_reset_transport_header(skb);
9c70220b 2707 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2708 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2709 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2710}
2711
ee22be7e 2712static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2713 struct sk_buff *skb, __u16 flags)
1da177e4 2714{
ee22be7e 2715 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2716 struct hci_dev *hdev = conn->hdev;
2717 struct sk_buff *list;
2718
087bfd99
GP		 2719 skb->len = skb_headlen(skb);
2720 skb->data_len = 0;
2721
2722 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2723
2724 switch (hdev->dev_type) {
2725 case HCI_BREDR:
2726 hci_add_acl_hdr(skb, conn->handle, flags);
2727 break;
2728 case HCI_AMP:
2729 hci_add_acl_hdr(skb, chan->handle, flags);
2730 break;
2731 default:
2732 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2733 return;
2734 }
087bfd99 2735
70f23020
AE		 2736 list = skb_shinfo(skb)->frag_list;
2737 if (!list) {
1da177e4
LT		 2738 /* Non fragmented */
2739 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2740
73d80deb 2741 skb_queue_tail(queue, skb);
1da177e4
LT		 2742 } else {
2743 /* Fragmented */
2744 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2745
2746 skb_shinfo(skb)->frag_list = NULL;
2747
2748 /* Queue all fragments atomically */
af3e6359 2749 spin_lock(&queue->lock);
1da177e4 2750
73d80deb 2751 __skb_queue_tail(queue, skb);
e702112f
AE		 2752
2753 flags &= ~ACL_START;
2754 flags |= ACL_CONT;
1da177e4
LT		 2755 do {
2756 skb = list; list = list->next;
8e87d142 2757
1da177e4 2758 skb->dev = (void *) hdev;
0d48d939 2759 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2760 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2761
2762 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2763
73d80deb 2764 __skb_queue_tail(queue, skb);
1da177e4
LT		 2765 } while (list);
2766
af3e6359 2767 spin_unlock(&queue->lock);
1da177e4 2768 }
73d80deb
LAD		 2769}
2770
2771void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2772{
ee22be7e 2773 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2774
f0e09510 2775 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2776
2777 skb->dev = (void *) hdev;
73d80deb 2778
ee22be7e 2779 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2780
3eff45ea 2781 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2782}
1da177e4
LT		 2783
2784/* Send SCO data */
0d861d8b 2785void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2786{
2787 struct hci_dev *hdev = conn->hdev;
2788 struct hci_sco_hdr hdr;
2789
2790 BT_DBG("%s len %d", hdev->name, skb->len);
2791
aca3192c 2792 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2793 hdr.dlen = skb->len;
2794
badff6d0
ACM		 2795 skb_push(skb, HCI_SCO_HDR_SIZE);
2796 skb_reset_transport_header(skb);
9c70220b 2797 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2798
2799 skb->dev = (void *) hdev;
0d48d939 2800 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2801
1da177e4 2802 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2803 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2804}
1da177e4
LT		 2805
2806/* ---- HCI TX task (outgoing data) ---- */
2807
2808/* HCI Connection scheduler */
6039aa73
GP		 2809static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2810 int *quote)
1da177e4
LT		 2811{
2812 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2813 struct hci_conn *conn = NULL, *c;
abc5de8f 2814 unsigned int num = 0, min = ~0;
1da177e4 2815
8e87d142 2816 /* We don't have to lock device here. Connections are always
1da177e4 2817 * added and removed with TX task disabled. */
bf4c6325
GP		 2818
2819 rcu_read_lock();
2820
2821 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2822 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2823 continue;
769be974
MH		 2824
2825 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2826 continue;
2827
1da177e4
LT		 2828 num++;
2829
2830 if (c->sent < min) {
2831 min = c->sent;
2832 conn = c;
2833 }
52087a79
LAD		 2834
2835 if (hci_conn_num(hdev, type) == num)
2836 break;
1da177e4
LT		 2837 }
2838
bf4c6325
GP		 2839 rcu_read_unlock();
2840
1da177e4 2841 if (conn) {
6ed58ec5
VT		 2842 int cnt, q;
2843
2844 switch (conn->type) {
2845 case ACL_LINK:
2846 cnt = hdev->acl_cnt;
2847 break;
2848 case SCO_LINK:
2849 case ESCO_LINK:
2850 cnt = hdev->sco_cnt;
2851 break;
2852 case LE_LINK:
2853 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2854 break;
2855 default:
2856 cnt = 0;
2857 BT_ERR("Unknown link type");
2858 }
2859
2860 q = cnt / num;
1da177e4
LT		 2861 *quote = q ? q : 1;
2862 } else
2863 *quote = 0;
2864
2865 BT_DBG("conn %p quote %d", conn, *quote);
2866 return conn;
2867}
2868
6039aa73 2869static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2870{
2871 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2872 struct hci_conn *c;
1da177e4 2873
bae1f5d9 2874 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2875
bf4c6325
GP		 2876 rcu_read_lock();
2877
1da177e4 2878 /* Kill stalled connections */
bf4c6325 2879 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2880 if (c->type == type && c->sent) {
6ed93dc6
AE		 2881 BT_ERR("%s killing stalled connection %pMR",
2882 hdev->name, &c->dst);
bed71748 2883 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2884 }
2885 }
bf4c6325
GP		 2886
2887 rcu_read_unlock();
1da177e4
LT		 2888}
2889
6039aa73
GP		 2890static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2891 int *quote)
1da177e4 2892{
73d80deb
LAD		 2893 struct hci_conn_hash *h = &hdev->conn_hash;
2894 struct hci_chan *chan = NULL;
abc5de8f 2895 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2896 struct hci_conn *conn;
73d80deb
LAD		 2897 int cnt, q, conn_num = 0;
2898
2899 BT_DBG("%s", hdev->name);
2900
bf4c6325
GP		 2901 rcu_read_lock();
2902
2903 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2904 struct hci_chan *tmp;
2905
2906 if (conn->type != type)
2907 continue;
2908
2909 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2910 continue;
2911
2912 conn_num++;
2913
8192edef 2914 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2915 struct sk_buff *skb;
2916
2917 if (skb_queue_empty(&tmp->data_q))
2918 continue;
2919
2920 skb = skb_peek(&tmp->data_q);
2921 if (skb->priority < cur_prio)
2922 continue;
2923
2924 if (skb->priority > cur_prio) {
2925 num = 0;
2926 min = ~0;
2927 cur_prio = skb->priority;
2928 }
2929
2930 num++;
2931
2932 if (conn->sent < min) {
2933 min = conn->sent;
2934 chan = tmp;
2935 }
2936 }
2937
2938 if (hci_conn_num(hdev, type) == conn_num)
2939 break;
2940 }
2941
bf4c6325
GP		 2942 rcu_read_unlock();
2943
73d80deb
LAD		 2944 if (!chan)
2945 return NULL;
2946
2947 switch (chan->conn->type) {
2948 case ACL_LINK:
2949 cnt = hdev->acl_cnt;
2950 break;
bd1eb66b
AE		 2951 case AMP_LINK:
2952 cnt = hdev->block_cnt;
2953 break;
73d80deb
LAD		 2954 case SCO_LINK:
2955 case ESCO_LINK:
2956 cnt = hdev->sco_cnt;
2957 break;
2958 case LE_LINK:
2959 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2960 break;
2961 default:
2962 cnt = 0;
2963 BT_ERR("Unknown link type");
2964 }
2965
2966 q = cnt / num;
2967 *quote = q ? q : 1;
2968 BT_DBG("chan %p quote %d", chan, *quote);
2969 return chan;
2970}
2971
02b20f0b
LAD		 2972static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2973{
2974 struct hci_conn_hash *h = &hdev->conn_hash;
2975 struct hci_conn *conn;
2976 int num = 0;
2977
2978 BT_DBG("%s", hdev->name);
2979
bf4c6325
GP		 2980 rcu_read_lock();
2981
2982 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2983 struct hci_chan *chan;
2984
2985 if (conn->type != type)
2986 continue;
2987
2988 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2989 continue;
2990
2991 num++;
2992
8192edef 2993 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2994 struct sk_buff *skb;
2995
2996 if (chan->sent) {
2997 chan->sent = 0;
2998 continue;
2999 }
3000
3001 if (skb_queue_empty(&chan->data_q))
3002 continue;
3003
3004 skb = skb_peek(&chan->data_q);
3005 if (skb->priority >= HCI_PRIO_MAX - 1)
3006 continue;
3007
3008 skb->priority = HCI_PRIO_MAX - 1;
3009
3010 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3011 skb->priority);
02b20f0b
LAD		 3012 }
3013
3014 if (hci_conn_num(hdev, type) == num)
3015 break;
3016 }
bf4c6325
GP		 3017
3018 rcu_read_unlock();
3019
02b20f0b
LAD		 3020}
3021
b71d385a
AE		 3022static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3023{
3024 /* Calculate count of blocks used by this packet */
3025 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3026}
3027
6039aa73 3028static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3029{
1da177e4
LT		 3030 if (!test_bit(HCI_RAW, &hdev->flags)) {
3031 /* ACL tx timeout must be longer than maximum
3032 * link supervision timeout (40.9 seconds) */
63d2bc1b 3033 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3034 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3035 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3036 }
63d2bc1b 3037}
1da177e4 3038
6039aa73 3039static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3040{
3041 unsigned int cnt = hdev->acl_cnt;
3042 struct hci_chan *chan;
3043 struct sk_buff *skb;
3044 int quote;
3045
3046 __check_timeout(hdev, cnt);
04837f64 3047
73d80deb 3048 while (hdev->acl_cnt &&
a8c5fb1a 3049 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3050 u32 priority = (skb_peek(&chan->data_q))->priority;
3051 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3052 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3053 skb->len, skb->priority);
73d80deb 3054
ec1cce24
LAD		 3055 /* Stop if priority has changed */
3056 if (skb->priority < priority)
3057 break;
3058
3059 skb = skb_dequeue(&chan->data_q);
3060
73d80deb 3061 hci_conn_enter_active_mode(chan->conn,
04124681 3062 bt_cb(skb)->force_active);
04837f64 3063
1da177e4
LT		 3064 hci_send_frame(skb);
3065 hdev->acl_last_tx = jiffies;
3066
3067 hdev->acl_cnt--;
73d80deb
LAD		 3068 chan->sent++;
3069 chan->conn->sent++;
1da177e4
LT		 3070 }
3071 }
02b20f0b
LAD		 3072
3073 if (cnt != hdev->acl_cnt)
3074 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3075}
3076
6039aa73 3077static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3078{
63d2bc1b 3079 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3080 struct hci_chan *chan;
3081 struct sk_buff *skb;
3082 int quote;
bd1eb66b 3083 u8 type;
b71d385a 3084
63d2bc1b 3085 __check_timeout(hdev, cnt);
b71d385a 3086
bd1eb66b
AE		 3087 BT_DBG("%s", hdev->name);
3088
3089 if (hdev->dev_type == HCI_AMP)
3090 type = AMP_LINK;
3091 else
3092 type = ACL_LINK;
3093
b71d385a 3094 while (hdev->block_cnt > 0 &&
bd1eb66b 3095 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3096 u32 priority = (skb_peek(&chan->data_q))->priority;
3097 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3098 int blocks;
3099
3100 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3101 skb->len, skb->priority);
b71d385a
AE		 3102
3103 /* Stop if priority has changed */
3104 if (skb->priority < priority)
3105 break;
3106
3107 skb = skb_dequeue(&chan->data_q);
3108
3109 blocks = __get_blocks(hdev, skb);
3110 if (blocks > hdev->block_cnt)
3111 return;
3112
3113 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3114 bt_cb(skb)->force_active);
b71d385a
AE		 3115
3116 hci_send_frame(skb);
3117 hdev->acl_last_tx = jiffies;
3118
3119 hdev->block_cnt -= blocks;
3120 quote -= blocks;
3121
3122 chan->sent += blocks;
3123 chan->conn->sent += blocks;
3124 }
3125 }
3126
3127 if (cnt != hdev->block_cnt)
bd1eb66b 3128 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3129}
3130
6039aa73 3131static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3132{
3133 BT_DBG("%s", hdev->name);
3134
bd1eb66b
AE		 3135 /* No ACL link over BR/EDR controller */
3136 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3137 return;
3138
3139 /* No AMP link over AMP controller */
3140 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3141 return;
3142
3143 switch (hdev->flow_ctl_mode) {
3144 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3145 hci_sched_acl_pkt(hdev);
3146 break;
3147
3148 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3149 hci_sched_acl_blk(hdev);
3150 break;
3151 }
3152}
3153
1da177e4 3154/* Schedule SCO */
6039aa73 3155static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3156{
3157 struct hci_conn *conn;
3158 struct sk_buff *skb;
3159 int quote;
3160
3161 BT_DBG("%s", hdev->name);
3162
52087a79
LAD		 3163 if (!hci_conn_num(hdev, SCO_LINK))
3164 return;
3165
1da177e4
LT		 3166 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3167 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3168 BT_DBG("skb %p len %d", skb, skb->len);
3169 hci_send_frame(skb);
3170
3171 conn->sent++;
3172 if (conn->sent == ~0)
3173 conn->sent = 0;
3174 }
3175 }
3176}
3177
6039aa73 3178static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3179{
3180 struct hci_conn *conn;
3181 struct sk_buff *skb;
3182 int quote;
3183
3184 BT_DBG("%s", hdev->name);
3185
52087a79
LAD		 3186 if (!hci_conn_num(hdev, ESCO_LINK))
3187 return;
3188
8fc9ced3
GP		 3189 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3190 &quote))) {
b6a0dc82
MH		 3191 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3192 BT_DBG("skb %p len %d", skb, skb->len);
3193 hci_send_frame(skb);
3194
3195 conn->sent++;
3196 if (conn->sent == ~0)
3197 conn->sent = 0;
3198 }
3199 }
3200}
3201
6039aa73 3202static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3203{
73d80deb 3204 struct hci_chan *chan;
6ed58ec5 3205 struct sk_buff *skb;
02b20f0b 3206 int quote, cnt, tmp;
6ed58ec5
VT		 3207
3208 BT_DBG("%s", hdev->name);
3209
52087a79
LAD		 3210 if (!hci_conn_num(hdev, LE_LINK))
3211 return;
3212
6ed58ec5
VT		 3213 if (!test_bit(HCI_RAW, &hdev->flags)) {
3214 /* LE tx timeout must be longer than maximum
3215 * link supervision timeout (40.9 seconds) */
bae1f5d9 3216 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3217 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3218 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3219 }
3220
3221 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3222 tmp = cnt;
73d80deb 3223 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3224 u32 priority = (skb_peek(&chan->data_q))->priority;
3225 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3226 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3227 skb->len, skb->priority);
6ed58ec5 3228
ec1cce24
LAD		 3229 /* Stop if priority has changed */
3230 if (skb->priority < priority)
3231 break;
3232
3233 skb = skb_dequeue(&chan->data_q);
3234
6ed58ec5
VT		 3235 hci_send_frame(skb);
3236 hdev->le_last_tx = jiffies;
3237
3238 cnt--;
73d80deb
LAD		 3239 chan->sent++;
3240 chan->conn->sent++;
6ed58ec5
VT		 3241 }
3242 }
73d80deb 3243
6ed58ec5
VT		 3244 if (hdev->le_pkts)
3245 hdev->le_cnt = cnt;
3246 else
3247 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3248
3249 if (cnt != tmp)
3250 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3251}
3252
3eff45ea 3253static void hci_tx_work(struct work_struct *work)
1da177e4 3254{
3eff45ea 3255 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3256 struct sk_buff *skb;
3257
6ed58ec5 3258 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3259 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 3260
3261 /* Schedule queues and send stuff to HCI driver */
3262
3263 hci_sched_acl(hdev);
3264
3265 hci_sched_sco(hdev);
3266
b6a0dc82
MH		 3267 hci_sched_esco(hdev);
3268
6ed58ec5
VT		 3269 hci_sched_le(hdev);
3270
1da177e4
LT		 3271 /* Send next queued raw (unknown type) packet */
3272 while ((skb = skb_dequeue(&hdev->raw_q)))
3273 hci_send_frame(skb);
1da177e4
LT		 3274}
3275
25985edc 3276/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3277
3278/* ACL data packet */
6039aa73 3279static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3280{
3281 struct hci_acl_hdr *hdr = (void *) skb->data;
3282 struct hci_conn *conn;
3283 __u16 handle, flags;
3284
3285 skb_pull(skb, HCI_ACL_HDR_SIZE);
3286
3287 handle = __le16_to_cpu(hdr->handle);
3288 flags = hci_flags(handle);
3289 handle = hci_handle(handle);
3290
f0e09510 3291 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3292 handle, flags);
1da177e4
LT		 3293
3294 hdev->stat.acl_rx++;
3295
3296 hci_dev_lock(hdev);
3297 conn = hci_conn_hash_lookup_handle(hdev, handle);
3298 hci_dev_unlock(hdev);
8e87d142 3299
1da177e4 3300 if (conn) {
65983fc7 3301 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3302
1da177e4 3303 /* Send to upper protocol */
686ebf28
UF		 3304 l2cap_recv_acldata(conn, skb, flags);
3305 return;
1da177e4 3306 } else {
8e87d142 3307 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3308 hdev->name, handle);
1da177e4
LT		 3309 }
3310
3311 kfree_skb(skb);
3312}
3313
3314/* SCO data packet */
6039aa73 3315static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3316{
3317 struct hci_sco_hdr *hdr = (void *) skb->data;
3318 struct hci_conn *conn;
3319 __u16 handle;
3320
3321 skb_pull(skb, HCI_SCO_HDR_SIZE);
3322
3323 handle = __le16_to_cpu(hdr->handle);
3324
f0e09510 3325 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3326
3327 hdev->stat.sco_rx++;
3328
3329 hci_dev_lock(hdev);
3330 conn = hci_conn_hash_lookup_handle(hdev, handle);
3331 hci_dev_unlock(hdev);
3332
3333 if (conn) {
1da177e4 3334 /* Send to upper protocol */
686ebf28
UF		 3335 sco_recv_scodata(conn, skb);
3336 return;
1da177e4 3337 } else {
8e87d142 3338 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3339 hdev->name, handle);
1da177e4
LT		 3340 }
3341
3342 kfree_skb(skb);
3343}
3344
9238f36a
JH		 3345static bool hci_req_is_complete(struct hci_dev *hdev)
3346{
3347 struct sk_buff *skb;
3348
3349 skb = skb_peek(&hdev->cmd_q);
3350 if (!skb)
3351 return true;
3352
3353 return bt_cb(skb)->req.start;
3354}
3355
42c6b129
JH		 3356static void hci_resend_last(struct hci_dev *hdev)
3357{
3358 struct hci_command_hdr *sent;
3359 struct sk_buff *skb;
3360 u16 opcode;
3361
3362 if (!hdev->sent_cmd)
3363 return;
3364
3365 sent = (void *) hdev->sent_cmd->data;
3366 opcode = __le16_to_cpu(sent->opcode);
3367 if (opcode == HCI_OP_RESET)
3368 return;
3369
3370 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3371 if (!skb)
3372 return;
3373
3374 skb_queue_head(&hdev->cmd_q, skb);
3375 queue_work(hdev->workqueue, &hdev->cmd_work);
3376}
3377
9238f36a
JH		 3378void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3379{
3380 hci_req_complete_t req_complete = NULL;
3381 struct sk_buff *skb;
3382 unsigned long flags;
3383
3384 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3385
42c6b129
JH		 3386 /* If the completed command doesn't match the last one that was
3387 * sent we need to do special handling of it.
9238f36a 3388 */
42c6b129
JH		 3389 if (!hci_sent_cmd_data(hdev, opcode)) {
3390 /* Some CSR based controllers generate a spontaneous
3391 * reset complete event during init and any pending
3392 * command will never be completed. In such a case we
3393 * need to resend whatever was the last sent
3394 * command.
3395 */
3396 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3397 hci_resend_last(hdev);
3398
9238f36a 3399 return;
42c6b129 3400 }
9238f36a
JH		 3401
3402 /* If the command succeeded and there's still more commands in
3403 * this request the request is not yet complete.
3404 */
3405 if (!status && !hci_req_is_complete(hdev))
3406 return;
3407
3408 /* If this was the last command in a request the complete
3409 * callback would be found in hdev->sent_cmd instead of the
3410 * command queue (hdev->cmd_q).
3411 */
3412 if (hdev->sent_cmd) {
3413 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
53e21fbc
JH		 3414
3415 if (req_complete) {
3416 /* We must set the complete callback to NULL to
3417 * avoid calling the callback more than once if
3418 * this function gets called again.
3419 */
3420 bt_cb(hdev->sent_cmd)->req.complete = NULL;
3421
9238f36a 3422 goto call_complete;
53e21fbc 3423 }
9238f36a
JH		 3424 }
3425
3426 /* Remove all pending commands belonging to this request */
3427 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3428 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3429 if (bt_cb(skb)->req.start) {
3430 __skb_queue_head(&hdev->cmd_q, skb);
3431 break;
3432 }
3433
3434 req_complete = bt_cb(skb)->req.complete;
3435 kfree_skb(skb);
3436 }
3437 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3438
3439call_complete:
3440 if (req_complete)
3441 req_complete(hdev, status);
3442}
3443
b78752cc 3444static void hci_rx_work(struct work_struct *work)
1da177e4 3445{
b78752cc 3446 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3447 struct sk_buff *skb;
3448
3449 BT_DBG("%s", hdev->name);
3450
1da177e4 3451 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3452 /* Send copy to monitor */
3453 hci_send_to_monitor(hdev, skb);
3454
1da177e4
LT		 3455 if (atomic_read(&hdev->promisc)) {
3456 /* Send copy to the sockets */
470fe1b5 3457 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3458 }
3459
3460 if (test_bit(HCI_RAW, &hdev->flags)) {
3461 kfree_skb(skb);
3462 continue;
3463 }
3464
3465 if (test_bit(HCI_INIT, &hdev->flags)) {
3466 /* Don't process data packets in this states. */
0d48d939 3467 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3468 case HCI_ACLDATA_PKT:
3469 case HCI_SCODATA_PKT:
3470 kfree_skb(skb);
3471 continue;
3ff50b79 3472 }
1da177e4
LT		 3473 }
3474
3475 /* Process frame */
0d48d939 3476 switch (bt_cb(skb)->pkt_type) {
1da177e4 3477 case HCI_EVENT_PKT:
b78752cc 3478 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3479 hci_event_packet(hdev, skb);
3480 break;
3481
3482 case HCI_ACLDATA_PKT:
3483 BT_DBG("%s ACL data packet", hdev->name);
3484 hci_acldata_packet(hdev, skb);
3485 break;
3486
3487 case HCI_SCODATA_PKT:
3488 BT_DBG("%s SCO data packet", hdev->name);
3489 hci_scodata_packet(hdev, skb);
3490 break;
3491
3492 default:
3493 kfree_skb(skb);
3494 break;
3495 }
3496 }
1da177e4
LT		 3497}
3498
c347b765 3499static void hci_cmd_work(struct work_struct *work)
1da177e4 3500{
c347b765 3501 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3502 struct sk_buff *skb;
3503
2104786b
AE		 3504 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3505 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3506
1da177e4 3507 /* Send queued commands */
5a08ecce
AE		 3508 if (atomic_read(&hdev->cmd_cnt)) {
3509 skb = skb_dequeue(&hdev->cmd_q);
3510 if (!skb)
3511 return;
3512
7585b97a 3513 kfree_skb(hdev->sent_cmd);
1da177e4 3514
70f23020
AE		 3515 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3516 if (hdev->sent_cmd) {
1da177e4
LT		 3517 atomic_dec(&hdev->cmd_cnt);
3518 hci_send_frame(skb);
7bdb8a5c
SJ		 3519 if (test_bit(HCI_RESET, &hdev->flags))
3520 del_timer(&hdev->cmd_timer);
3521 else
3522 mod_timer(&hdev->cmd_timer,
5f246e89 3523 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3524 } else {
3525 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3526 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3527 }
3528 }
3529}
2519a1fc 3530
31f7956c
AG		 3531u8 bdaddr_to_le(u8 bdaddr_type)
3532{
3533 switch (bdaddr_type) {
3534 case BDADDR_LE_PUBLIC:
3535 return ADDR_LE_DEV_PUBLIC;
3536
3537 default:
3538 /* Fallback to LE Random address type */
3539 return ADDR_LE_DEV_RANDOM;
3540 }
3541}
Linux kernel - Deliverables
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