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