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Bluetooth: Check hci_req_run returning value in __hci_req_sync
[GitHub/mt8127/android_kernel_alcatel_ttab.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
82/* Execute request and wait for completion. */
01178cd4 83static int __hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 84 void (*func)(struct hci_request *req,
85 unsigned long opt),
01178cd4 86 unsigned long opt, __u32 timeout)
1da177e4 87{
42c6b129 88 struct hci_request req;
1da177e4
LT		 89 DECLARE_WAITQUEUE(wait, current);
90 int err = 0;
91
92 BT_DBG("%s start", hdev->name);
93
42c6b129
JH		 94 hci_req_init(&req, hdev);
95
1da177e4
LT		 96 hdev->req_status = HCI_REQ_PEND;
97
42c6b129 98 func(&req, opt);
53cce22d 99
42c6b129
JH		 100 err = hci_req_run(&req, hci_req_sync_complete);
101 if (err < 0) {
53cce22d 102 hdev->req_status = 0;
920c8300
AG		 103
104 /* ENODATA means the HCI request command queue is empty.
105 * This can happen when a request with conditionals doesn't
106 * trigger any commands to be sent. This is normal behavior
107 * and should not trigger an error return.
42c6b129 108 */
920c8300
AG		 109 if (err == -ENODATA)
110 return 0;
111
112 return err;
53cce22d
JH		 113 }
114
bc4445c7
AG		 115 add_wait_queue(&hdev->req_wait_q, &wait);
116 set_current_state(TASK_INTERRUPTIBLE);
117
1da177e4
LT		 118 schedule_timeout(timeout);
119
120 remove_wait_queue(&hdev->req_wait_q, &wait);
121
122 if (signal_pending(current))
123 return -EINTR;
124
125 switch (hdev->req_status) {
126 case HCI_REQ_DONE:
e175072f 127 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 128 break;
129
130 case HCI_REQ_CANCELED:
131 err = -hdev->req_result;
132 break;
133
134 default:
135 err = -ETIMEDOUT;
136 break;
3ff50b79 137 }
1da177e4 138
a5040efa 139 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 140
141 BT_DBG("%s end: err %d", hdev->name, err);
142
143 return err;
144}
145
01178cd4 146static int hci_req_sync(struct hci_dev *hdev,
42c6b129
JH		 147 void (*req)(struct hci_request *req,
148 unsigned long opt),
01178cd4 149 unsigned long opt, __u32 timeout)
1da177e4
LT		 150{
151 int ret;
152
7c6a329e
MH		 153 if (!test_bit(HCI_UP, &hdev->flags))
154 return -ENETDOWN;
155
1da177e4
LT		 156 /* Serialize all requests */
157 hci_req_lock(hdev);
01178cd4 158 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 159 hci_req_unlock(hdev);
160
161 return ret;
162}
163
42c6b129 164static void hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 165{
42c6b129 166 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 167
168 /* Reset device */
42c6b129
JH		 169 set_bit(HCI_RESET, &req->hdev->flags);
170 hci_req_add(req, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 171}
172
42c6b129 173static void bredr_init(struct hci_request *req)
1da177e4 174{
42c6b129 175 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 176
1da177e4 177 /* Read Local Supported Features */
42c6b129 178 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 179
1143e5a6 180 /* Read Local Version */
42c6b129 181 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 182
183 /* Read BD Address */
42c6b129 184 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 185}
186
42c6b129 187static void amp_init(struct hci_request *req)
e61ef499 188{
42c6b129 189 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 190
e61ef499 191 /* Read Local Version */
42c6b129 192 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 193
194 /* Read Local AMP Info */
42c6b129 195 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 196
197 /* Read Data Blk size */
42c6b129 198 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
e61ef499
AE		 199}
200
42c6b129 201static void hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 202{
42c6b129
JH		 203 struct hci_dev *hdev = req->hdev;
204 struct hci_request init_req;
e61ef499
AE		 205 struct sk_buff *skb;
206
207 BT_DBG("%s %ld", hdev->name, opt);
208
209 /* Driver initialization */
210
42c6b129
JH		 211 hci_req_init(&init_req, hdev);
212
e61ef499
AE		 213 /* Special commands */
214 while ((skb = skb_dequeue(&hdev->driver_init))) {
215 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
216 skb->dev = (void *) hdev;
217
42c6b129
JH		 218 if (skb_queue_empty(&init_req.cmd_q))
219 bt_cb(skb)->req.start = true;
220
221 skb_queue_tail(&init_req.cmd_q, skb);
e61ef499
AE		 222 }
223 skb_queue_purge(&hdev->driver_init);
224
42c6b129
JH		 225 hci_req_run(&init_req, NULL);
226
11778716
AE		 227 /* Reset */
228 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 229 hci_reset_req(req, 0);
11778716 230
e61ef499
AE		 231 switch (hdev->dev_type) {
232 case HCI_BREDR:
42c6b129 233 bredr_init(req);
e61ef499
AE		 234 break;
235
236 case HCI_AMP:
42c6b129 237 amp_init(req);
e61ef499
AE		 238 break;
239
240 default:
241 BT_ERR("Unknown device type %d", hdev->dev_type);
242 break;
243 }
e61ef499
AE		 244}
245
42c6b129 246static void bredr_setup(struct hci_request *req)
2177bab5
JH		 247{
248 struct hci_cp_delete_stored_link_key cp;
249 __le16 param;
250 __u8 flt_type;
251
252 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 253 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 254
255 /* Read Class of Device */
42c6b129 256 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 257
258 /* Read Local Name */
42c6b129 259 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 260
261 /* Read Voice Setting */
42c6b129 262 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5
JH		 263
264 /* Clear Event Filters */
265 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 266 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 267
268 /* Connection accept timeout ~20 secs */
269 param = __constant_cpu_to_le16(0x7d00);
42c6b129 270 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5
JH		 271
272 bacpy(&cp.bdaddr, BDADDR_ANY);
273 cp.delete_all = 0x01;
42c6b129 274 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
2177bab5
JH		 275}
276
42c6b129 277static void le_setup(struct hci_request *req)
2177bab5
JH		 278{
279 /* Read LE Buffer Size */
42c6b129 280 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 281
282 /* Read LE Local Supported Features */
42c6b129 283 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5
JH		 284
285 /* Read LE Advertising Channel TX Power */
42c6b129 286 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
2177bab5
JH		 287
288 /* Read LE White List Size */
42c6b129 289 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
2177bab5
JH		 290
291 /* Read LE Supported States */
42c6b129 292 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
2177bab5
JH		 293}
294
295static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
296{
297 if (lmp_ext_inq_capable(hdev))
298 return 0x02;
299
300 if (lmp_inq_rssi_capable(hdev))
301 return 0x01;
302
303 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
304 hdev->lmp_subver == 0x0757)
305 return 0x01;
306
307 if (hdev->manufacturer == 15) {
308 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
309 return 0x01;
310 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
311 return 0x01;
312 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
313 return 0x01;
314 }
315
316 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
317 hdev->lmp_subver == 0x1805)
318 return 0x01;
319
320 return 0x00;
321}
322
42c6b129 323static void hci_setup_inquiry_mode(struct hci_request *req)
2177bab5
JH		 324{
325 u8 mode;
326
42c6b129 327 mode = hci_get_inquiry_mode(req->hdev);
2177bab5 328
42c6b129 329 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
2177bab5
JH		 330}
331
42c6b129 332static void hci_setup_event_mask(struct hci_request *req)
2177bab5 333{
42c6b129
JH		 334 struct hci_dev *hdev = req->hdev;
335
2177bab5
JH		 336 /* The second byte is 0xff instead of 0x9f (two reserved bits
337 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
338 * command otherwise.
339 */
340 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
341
342 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
343 * any event mask for pre 1.2 devices.
344 */
345 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
346 return;
347
348 if (lmp_bredr_capable(hdev)) {
349 events[4] |= 0x01; /* Flow Specification Complete */
350 events[4] |= 0x02; /* Inquiry Result with RSSI */
351 events[4] |= 0x04; /* Read Remote Extended Features Complete */
352 events[5] |= 0x08; /* Synchronous Connection Complete */
353 events[5] |= 0x10; /* Synchronous Connection Changed */
354 }
355
356 if (lmp_inq_rssi_capable(hdev))
357 events[4] |= 0x02; /* Inquiry Result with RSSI */
358
359 if (lmp_sniffsubr_capable(hdev))
360 events[5] |= 0x20; /* Sniff Subrating */
361
362 if (lmp_pause_enc_capable(hdev))
363 events[5] |= 0x80; /* Encryption Key Refresh Complete */
364
365 if (lmp_ext_inq_capable(hdev))
366 events[5] |= 0x40; /* Extended Inquiry Result */
367
368 if (lmp_no_flush_capable(hdev))
369 events[7] |= 0x01; /* Enhanced Flush Complete */
370
371 if (lmp_lsto_capable(hdev))
372 events[6] |= 0x80; /* Link Supervision Timeout Changed */
373
374 if (lmp_ssp_capable(hdev)) {
375 events[6] |= 0x01; /* IO Capability Request */
376 events[6] |= 0x02; /* IO Capability Response */
377 events[6] |= 0x04; /* User Confirmation Request */
378 events[6] |= 0x08; /* User Passkey Request */
379 events[6] |= 0x10; /* Remote OOB Data Request */
380 events[6] |= 0x20; /* Simple Pairing Complete */
381 events[7] |= 0x04; /* User Passkey Notification */
382 events[7] |= 0x08; /* Keypress Notification */
383 events[7] |= 0x10; /* Remote Host Supported
384 * Features Notification
385 */
386 }
387
388 if (lmp_le_capable(hdev))
389 events[7] |= 0x20; /* LE Meta-Event */
390
42c6b129 391 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 392
393 if (lmp_le_capable(hdev)) {
394 memset(events, 0, sizeof(events));
395 events[0] = 0x1f;
42c6b129
JH		 396 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
397 sizeof(events), events);
2177bab5
JH		 398 }
399}
400
42c6b129 401static void hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 402{
42c6b129
JH		 403 struct hci_dev *hdev = req->hdev;
404
2177bab5 405 if (lmp_bredr_capable(hdev))
42c6b129 406 bredr_setup(req);
2177bab5
JH		 407
408 if (lmp_le_capable(hdev))
42c6b129 409 le_setup(req);
2177bab5 410
42c6b129 411 hci_setup_event_mask(req);
2177bab5
JH		 412
413 if (hdev->hci_ver > BLUETOOTH_VER_1_1)
42c6b129 414 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 415
416 if (lmp_ssp_capable(hdev)) {
417 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
418 u8 mode = 0x01;
42c6b129
JH		 419 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
420 sizeof(mode), &mode);
2177bab5
JH		 421 } else {
422 struct hci_cp_write_eir cp;
423
424 memset(hdev->eir, 0, sizeof(hdev->eir));
425 memset(&cp, 0, sizeof(cp));
426
42c6b129 427 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 428 }
429 }
430
431 if (lmp_inq_rssi_capable(hdev))
42c6b129 432 hci_setup_inquiry_mode(req);
2177bab5
JH		 433
434 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 435 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 436
437 if (lmp_ext_feat_capable(hdev)) {
438 struct hci_cp_read_local_ext_features cp;
439
440 cp.page = 0x01;
42c6b129
JH		 441 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
442 sizeof(cp), &cp);
2177bab5
JH		 443 }
444
445 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
446 u8 enable = 1;
42c6b129
JH		 447 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
448 &enable);
2177bab5
JH		 449 }
450}
451
42c6b129 452static void hci_setup_link_policy(struct hci_request *req)
2177bab5 453{
42c6b129 454 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 455 struct hci_cp_write_def_link_policy cp;
456 u16 link_policy = 0;
457
458 if (lmp_rswitch_capable(hdev))
459 link_policy |= HCI_LP_RSWITCH;
460 if (lmp_hold_capable(hdev))
461 link_policy |= HCI_LP_HOLD;
462 if (lmp_sniff_capable(hdev))
463 link_policy |= HCI_LP_SNIFF;
464 if (lmp_park_capable(hdev))
465 link_policy |= HCI_LP_PARK;
466
467 cp.policy = cpu_to_le16(link_policy);
42c6b129 468 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 469}
470
42c6b129 471static void hci_set_le_support(struct hci_request *req)
2177bab5 472{
42c6b129 473 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 474 struct hci_cp_write_le_host_supported cp;
475
476 memset(&cp, 0, sizeof(cp));
477
478 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
479 cp.le = 0x01;
480 cp.simul = lmp_le_br_capable(hdev);
481 }
482
483 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 484 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
485 &cp);
2177bab5
JH		 486}
487
42c6b129 488static void hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 489{
42c6b129
JH		 490 struct hci_dev *hdev = req->hdev;
491
2177bab5 492 if (hdev->commands[5] & 0x10)
42c6b129 493 hci_setup_link_policy(req);
2177bab5
JH		 494
495 if (lmp_le_capable(hdev))
42c6b129 496 hci_set_le_support(req);
2177bab5
JH		 497}
498
499static int __hci_init(struct hci_dev *hdev)
500{
501 int err;
502
503 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
504 if (err < 0)
505 return err;
506
507 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
508 * BR/EDR/LE type controllers. AMP controllers only need the
509 * first stage init.
510 */
511 if (hdev->dev_type != HCI_BREDR)
512 return 0;
513
514 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
515 if (err < 0)
516 return err;
517
518 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
519}
520
42c6b129 521static void hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 522{
523 __u8 scan = opt;
524
42c6b129 525 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 526
527 /* Inquiry and Page scans */
42c6b129 528 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 529}
530
42c6b129 531static void hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 532{
533 __u8 auth = opt;
534
42c6b129 535 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 536
537 /* Authentication */
42c6b129 538 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 539}
540
42c6b129 541static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 542{
543 __u8 encrypt = opt;
544
42c6b129 545 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 546
e4e8e37c 547 /* Encryption */
42c6b129 548 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 549}
550
42c6b129 551static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 552{
553 __le16 policy = cpu_to_le16(opt);
554
42c6b129 555 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 556
557 /* Default link policy */
42c6b129 558 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
e4e8e37c
MH		 559}
560
8e87d142 561/* Get HCI device by index.
1da177e4
LT		 562 * Device is held on return. */
563struct hci_dev *hci_dev_get(int index)
564{
8035ded4 565 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 566
567 BT_DBG("%d", index);
568
569 if (index < 0)
570 return NULL;
571
572 read_lock(&hci_dev_list_lock);
8035ded4 573 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 574 if (d->id == index) {
575 hdev = hci_dev_hold(d);
576 break;
577 }
578 }
579 read_unlock(&hci_dev_list_lock);
580 return hdev;
581}
1da177e4
LT		 582
583/* ---- Inquiry support ---- */
ff9ef578 584
30dc78e1
JH		 585bool hci_discovery_active(struct hci_dev *hdev)
586{
587 struct discovery_state *discov = &hdev->discovery;
588
6fbe195d 589 switch (discov->state) {
343f935b 590 case DISCOVERY_FINDING:
6fbe195d 591 case DISCOVERY_RESOLVING:
30dc78e1
JH		 592 return true;
593
6fbe195d
AG		 594 default:
595 return false;
596 }
30dc78e1
JH		 597}
598
ff9ef578
JH		 599void hci_discovery_set_state(struct hci_dev *hdev, int state)
600{
601 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
602
603 if (hdev->discovery.state == state)
604 return;
605
606 switch (state) {
607 case DISCOVERY_STOPPED:
7b99b659
AG		 608 if (hdev->discovery.state != DISCOVERY_STARTING)
609 mgmt_discovering(hdev, 0);
ff9ef578
JH		 610 break;
611 case DISCOVERY_STARTING:
612 break;
343f935b 613 case DISCOVERY_FINDING:
ff9ef578
JH		 614 mgmt_discovering(hdev, 1);
615 break;
30dc78e1
JH		 616 case DISCOVERY_RESOLVING:
617 break;
ff9ef578
JH		 618 case DISCOVERY_STOPPING:
619 break;
620 }
621
622 hdev->discovery.state = state;
623}
624
1da177e4
LT		 625static void inquiry_cache_flush(struct hci_dev *hdev)
626{
30883512 627 struct discovery_state *cache = &hdev->discovery;
b57c1a56 628 struct inquiry_entry *p, *n;
1da177e4 629
561aafbc
JH		 630 list_for_each_entry_safe(p, n, &cache->all, all) {
631 list_del(&p->all);
b57c1a56 632 kfree(p);
1da177e4 633 }
561aafbc
JH		 634
635 INIT_LIST_HEAD(&cache->unknown);
636 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 637}
638
a8c5fb1a
GP		 639struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
640 bdaddr_t *bdaddr)
1da177e4 641{
30883512 642 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 643 struct inquiry_entry *e;
644
6ed93dc6 645 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 646
561aafbc
JH		 647 list_for_each_entry(e, &cache->all, all) {
648 if (!bacmp(&e->data.bdaddr, bdaddr))
649 return e;
650 }
651
652 return NULL;
653}
654
655struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 656 bdaddr_t *bdaddr)
561aafbc 657{
30883512 658 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 659 struct inquiry_entry *e;
660
6ed93dc6 661 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 662
663 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 664 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 665 return e;
666 }
667
668 return NULL;
1da177e4
LT		 669}
670
30dc78e1 671struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 672 bdaddr_t *bdaddr,
673 int state)
30dc78e1
JH		 674{
675 struct discovery_state *cache = &hdev->discovery;
676 struct inquiry_entry *e;
677
6ed93dc6 678 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 679
680 list_for_each_entry(e, &cache->resolve, list) {
681 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
682 return e;
683 if (!bacmp(&e->data.bdaddr, bdaddr))
684 return e;
685 }
686
687 return NULL;
688}
689
a3d4e20a 690void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 691 struct inquiry_entry *ie)
a3d4e20a
JH		 692{
693 struct discovery_state *cache = &hdev->discovery;
694 struct list_head *pos = &cache->resolve;
695 struct inquiry_entry *p;
696
697 list_del(&ie->list);
698
699 list_for_each_entry(p, &cache->resolve, list) {
700 if (p->name_state != NAME_PENDING &&
a8c5fb1a 701 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 702 break;
703 pos = &p->list;
704 }
705
706 list_add(&ie->list, pos);
707}
708
3175405b 709bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 710 bool name_known, bool *ssp)
1da177e4 711{
30883512 712 struct discovery_state *cache = &hdev->discovery;
70f23020 713 struct inquiry_entry *ie;
1da177e4 714
6ed93dc6 715 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 716
2b2fec4d
SJ		 717 hci_remove_remote_oob_data(hdev, &data->bdaddr);
718
388fc8fa
JH		 719 if (ssp)
720 *ssp = data->ssp_mode;
721
70f23020 722 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 723 if (ie) {
388fc8fa
JH		 724 if (ie->data.ssp_mode && ssp)
725 *ssp = true;
726
a3d4e20a 727 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 728 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 729 ie->data.rssi = data->rssi;
730 hci_inquiry_cache_update_resolve(hdev, ie);
731 }
732
561aafbc 733 goto update;
a3d4e20a 734 }
561aafbc
JH		 735
736 /* Entry not in the cache. Add new one. */
737 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
738 if (!ie)
3175405b 739 return false;
561aafbc
JH		 740
741 list_add(&ie->all, &cache->all);
742
743 if (name_known) {
744 ie->name_state = NAME_KNOWN;
745 } else {
746 ie->name_state = NAME_NOT_KNOWN;
747 list_add(&ie->list, &cache->unknown);
748 }
70f23020 749
561aafbc
JH		 750update:
751 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 752 ie->name_state != NAME_PENDING) {
561aafbc
JH		 753 ie->name_state = NAME_KNOWN;
754 list_del(&ie->list);
1da177e4
LT		 755 }
756
70f23020
AE		 757 memcpy(&ie->data, data, sizeof(*data));
758 ie->timestamp = jiffies;
1da177e4 759 cache->timestamp = jiffies;
3175405b
JH		 760
761 if (ie->name_state == NAME_NOT_KNOWN)
762 return false;
763
764 return true;
1da177e4
LT		 765}
766
767static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
768{
30883512 769 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 770 struct inquiry_info *info = (struct inquiry_info *) buf;
771 struct inquiry_entry *e;
772 int copied = 0;
773
561aafbc 774 list_for_each_entry(e, &cache->all, all) {
1da177e4 775 struct inquiry_data *data = &e->data;
b57c1a56
JH		 776
777 if (copied >= num)
778 break;
779
1da177e4
LT		 780 bacpy(&info->bdaddr, &data->bdaddr);
781 info->pscan_rep_mode = data->pscan_rep_mode;
782 info->pscan_period_mode = data->pscan_period_mode;
783 info->pscan_mode = data->pscan_mode;
784 memcpy(info->dev_class, data->dev_class, 3);
785 info->clock_offset = data->clock_offset;
b57c1a56 786
1da177e4 787 info++;
b57c1a56 788 copied++;
1da177e4
LT		 789 }
790
791 BT_DBG("cache %p, copied %d", cache, copied);
792 return copied;
793}
794
42c6b129 795static void hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 796{
797 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 798 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 799 struct hci_cp_inquiry cp;
800
801 BT_DBG("%s", hdev->name);
802
803 if (test_bit(HCI_INQUIRY, &hdev->flags))
804 return;
805
806 /* Start Inquiry */
807 memcpy(&cp.lap, &ir->lap, 3);
808 cp.length = ir->length;
809 cp.num_rsp = ir->num_rsp;
42c6b129 810 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 811}
812
813int hci_inquiry(void __user *arg)
814{
815 __u8 __user *ptr = arg;
816 struct hci_inquiry_req ir;
817 struct hci_dev *hdev;
818 int err = 0, do_inquiry = 0, max_rsp;
819 long timeo;
820 __u8 *buf;
821
822 if (copy_from_user(&ir, ptr, sizeof(ir)))
823 return -EFAULT;
824
5a08ecce
AE		 825 hdev = hci_dev_get(ir.dev_id);
826 if (!hdev)
1da177e4
LT		 827 return -ENODEV;
828
09fd0de5 829 hci_dev_lock(hdev);
8e87d142 830 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 831 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 832 inquiry_cache_flush(hdev);
833 do_inquiry = 1;
834 }
09fd0de5 835 hci_dev_unlock(hdev);
1da177e4 836
04837f64 837 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 838
839 if (do_inquiry) {
01178cd4
JH		 840 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
841 timeo);
70f23020
AE		 842 if (err < 0)
843 goto done;
844 }
1da177e4 845
8fc9ced3
GP		 846 /* for unlimited number of responses we will use buffer with
847 * 255 entries
848 */
1da177e4
LT		 849 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
850
851 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
852 * copy it to the user space.
853 */
01df8c31 854 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 855 if (!buf) {
1da177e4
LT		 856 err = -ENOMEM;
857 goto done;
858 }
859
09fd0de5 860 hci_dev_lock(hdev);
1da177e4 861 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 862 hci_dev_unlock(hdev);
1da177e4
LT		 863
864 BT_DBG("num_rsp %d", ir.num_rsp);
865
866 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
867 ptr += sizeof(ir);
868 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 869 ir.num_rsp))
1da177e4 870 err = -EFAULT;
8e87d142 871 } else
1da177e4
LT		 872 err = -EFAULT;
873
874 kfree(buf);
875
876done:
877 hci_dev_put(hdev);
878 return err;
879}
880
3f0f524b
JH		 881static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
882{
883 u8 ad_len = 0, flags = 0;
884 size_t name_len;
885
886 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
887 flags |= LE_AD_GENERAL;
888
889 if (!lmp_bredr_capable(hdev))
890 flags |= LE_AD_NO_BREDR;
891
892 if (lmp_le_br_capable(hdev))
893 flags |= LE_AD_SIM_LE_BREDR_CTRL;
894
895 if (lmp_host_le_br_capable(hdev))
896 flags |= LE_AD_SIM_LE_BREDR_HOST;
897
898 if (flags) {
899 BT_DBG("adv flags 0x%02x", flags);
900
901 ptr[0] = 2;
902 ptr[1] = EIR_FLAGS;
903 ptr[2] = flags;
904
905 ad_len += 3;
906 ptr += 3;
907 }
908
909 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
910 ptr[0] = 2;
911 ptr[1] = EIR_TX_POWER;
912 ptr[2] = (u8) hdev->adv_tx_power;
913
914 ad_len += 3;
915 ptr += 3;
916 }
917
918 name_len = strlen(hdev->dev_name);
919 if (name_len > 0) {
920 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
921
922 if (name_len > max_len) {
923 name_len = max_len;
924 ptr[1] = EIR_NAME_SHORT;
925 } else
926 ptr[1] = EIR_NAME_COMPLETE;
927
928 ptr[0] = name_len + 1;
929
930 memcpy(ptr + 2, hdev->dev_name, name_len);
931
932 ad_len += (name_len + 2);
933 ptr += (name_len + 2);
934 }
935
936 return ad_len;
937}
938
939int hci_update_ad(struct hci_dev *hdev)
940{
941 struct hci_cp_le_set_adv_data cp;
942 u8 len;
943 int err;
944
945 hci_dev_lock(hdev);
946
947 if (!lmp_le_capable(hdev)) {
948 err = -EINVAL;
949 goto unlock;
950 }
951
952 memset(&cp, 0, sizeof(cp));
953
954 len = create_ad(hdev, cp.data);
955
956 if (hdev->adv_data_len == len &&
957 memcmp(cp.data, hdev->adv_data, len) == 0) {
958 err = 0;
959 goto unlock;
960 }
961
962 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
963 hdev->adv_data_len = len;
964
965 cp.length = len;
966 err = hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
967
968unlock:
969 hci_dev_unlock(hdev);
970
971 return err;
972}
973
1da177e4
LT		 974/* ---- HCI ioctl helpers ---- */
975
976int hci_dev_open(__u16 dev)
977{
978 struct hci_dev *hdev;
979 int ret = 0;
980
5a08ecce
AE		 981 hdev = hci_dev_get(dev);
982 if (!hdev)
1da177e4
LT		 983 return -ENODEV;
984
985 BT_DBG("%s %p", hdev->name, hdev);
986
987 hci_req_lock(hdev);
988
94324962
JH		 989 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
990 ret = -ENODEV;
991 goto done;
992 }
993
611b30f7
MH		 994 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
995 ret = -ERFKILL;
996 goto done;
997 }
998
1da177e4
LT		 999 if (test_bit(HCI_UP, &hdev->flags)) {
1000 ret = -EALREADY;
1001 goto done;
1002 }
1003
1004 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1005 set_bit(HCI_RAW, &hdev->flags);
1006
07e3b94a
AE		 1007 /* Treat all non BR/EDR controllers as raw devices if
1008 enable_hs is not set */
1009 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 1010 set_bit(HCI_RAW, &hdev->flags);
1011
1da177e4
LT		 1012 if (hdev->open(hdev)) {
1013 ret = -EIO;
1014 goto done;
1015 }
1016
1017 if (!test_bit(HCI_RAW, &hdev->flags)) {
1018 atomic_set(&hdev->cmd_cnt, 1);
1019 set_bit(HCI_INIT, &hdev->flags);
2177bab5 1020 ret = __hci_init(hdev);
1da177e4
LT		 1021 clear_bit(HCI_INIT, &hdev->flags);
1022 }
1023
1024 if (!ret) {
1025 hci_dev_hold(hdev);
1026 set_bit(HCI_UP, &hdev->flags);
1027 hci_notify(hdev, HCI_DEV_UP);
3f0f524b 1028 hci_update_ad(hdev);
bb4b2a9a
AE		 1029 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1030 mgmt_valid_hdev(hdev)) {
09fd0de5 1031 hci_dev_lock(hdev);
744cf19e 1032 mgmt_powered(hdev, 1);
09fd0de5 1033 hci_dev_unlock(hdev);
56e5cb86 1034 }
8e87d142 1035 } else {
1da177e4 1036 /* Init failed, cleanup */
3eff45ea 1037 flush_work(&hdev->tx_work);
c347b765 1038 flush_work(&hdev->cmd_work);
b78752cc 1039 flush_work(&hdev->rx_work);
1da177e4
LT		 1040
1041 skb_queue_purge(&hdev->cmd_q);
1042 skb_queue_purge(&hdev->rx_q);
1043
1044 if (hdev->flush)
1045 hdev->flush(hdev);
1046
1047 if (hdev->sent_cmd) {
1048 kfree_skb(hdev->sent_cmd);
1049 hdev->sent_cmd = NULL;
1050 }
1051
1052 hdev->close(hdev);
1053 hdev->flags = 0;
1054 }
1055
1056done:
1057 hci_req_unlock(hdev);
1058 hci_dev_put(hdev);
1059 return ret;
1060}
1061
1062static int hci_dev_do_close(struct hci_dev *hdev)
1063{
1064 BT_DBG("%s %p", hdev->name, hdev);
1065
28b75a89
AG		 1066 cancel_work_sync(&hdev->le_scan);
1067
78c04c0b
VCG		 1068 cancel_delayed_work(&hdev->power_off);
1069
1da177e4
LT		 1070 hci_req_cancel(hdev, ENODEV);
1071 hci_req_lock(hdev);
1072
1073 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1074 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1075 hci_req_unlock(hdev);
1076 return 0;
1077 }
1078
3eff45ea
GP		 1079 /* Flush RX and TX works */
1080 flush_work(&hdev->tx_work);
b78752cc 1081 flush_work(&hdev->rx_work);
1da177e4 1082
16ab91ab 1083 if (hdev->discov_timeout > 0) {
e0f9309f 1084 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1085 hdev->discov_timeout = 0;
5e5282bb 1086 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1087 }
1088
a8b2d5c2 1089 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1090 cancel_delayed_work(&hdev->service_cache);
1091
7ba8b4be
AG		 1092 cancel_delayed_work_sync(&hdev->le_scan_disable);
1093
09fd0de5 1094 hci_dev_lock(hdev);
1da177e4
LT		 1095 inquiry_cache_flush(hdev);
1096 hci_conn_hash_flush(hdev);
09fd0de5 1097 hci_dev_unlock(hdev);
1da177e4
LT		 1098
1099 hci_notify(hdev, HCI_DEV_DOWN);
1100
1101 if (hdev->flush)
1102 hdev->flush(hdev);
1103
1104 /* Reset device */
1105 skb_queue_purge(&hdev->cmd_q);
1106 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1107 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1108 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1109 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1110 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1111 clear_bit(HCI_INIT, &hdev->flags);
1112 }
1113
c347b765
GP		 1114 /* flush cmd work */
1115 flush_work(&hdev->cmd_work);
1da177e4
LT		 1116
1117 /* Drop queues */
1118 skb_queue_purge(&hdev->rx_q);
1119 skb_queue_purge(&hdev->cmd_q);
1120 skb_queue_purge(&hdev->raw_q);
1121
1122 /* Drop last sent command */
1123 if (hdev->sent_cmd) {
b79f44c1 1124 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1125 kfree_skb(hdev->sent_cmd);
1126 hdev->sent_cmd = NULL;
1127 }
1128
1129 /* After this point our queues are empty
1130 * and no tasks are scheduled. */
1131 hdev->close(hdev);
1132
bb4b2a9a
AE		 1133 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1134 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 1135 hci_dev_lock(hdev);
1136 mgmt_powered(hdev, 0);
1137 hci_dev_unlock(hdev);
1138 }
5add6af8 1139
1da177e4
LT		 1140 /* Clear flags */
1141 hdev->flags = 0;
1142
ced5c338
AE		 1143 /* Controller radio is available but is currently powered down */
1144 hdev->amp_status = 0;
1145
e59fda8d 1146 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1147 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1148
1da177e4
LT		 1149 hci_req_unlock(hdev);
1150
1151 hci_dev_put(hdev);
1152 return 0;
1153}
1154
1155int hci_dev_close(__u16 dev)
1156{
1157 struct hci_dev *hdev;
1158 int err;
1159
70f23020
AE		 1160 hdev = hci_dev_get(dev);
1161 if (!hdev)
1da177e4 1162 return -ENODEV;
8ee56540
MH		 1163
1164 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1165 cancel_delayed_work(&hdev->power_off);
1166
1da177e4 1167 err = hci_dev_do_close(hdev);
8ee56540 1168
1da177e4
LT		 1169 hci_dev_put(hdev);
1170 return err;
1171}
1172
1173int hci_dev_reset(__u16 dev)
1174{
1175 struct hci_dev *hdev;
1176 int ret = 0;
1177
70f23020
AE		 1178 hdev = hci_dev_get(dev);
1179 if (!hdev)
1da177e4
LT		 1180 return -ENODEV;
1181
1182 hci_req_lock(hdev);
1da177e4
LT		 1183
1184 if (!test_bit(HCI_UP, &hdev->flags))
1185 goto done;
1186
1187 /* Drop queues */
1188 skb_queue_purge(&hdev->rx_q);
1189 skb_queue_purge(&hdev->cmd_q);
1190
09fd0de5 1191 hci_dev_lock(hdev);
1da177e4
LT		 1192 inquiry_cache_flush(hdev);
1193 hci_conn_hash_flush(hdev);
09fd0de5 1194 hci_dev_unlock(hdev);
1da177e4
LT		 1195
1196 if (hdev->flush)
1197 hdev->flush(hdev);
1198
8e87d142 1199 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1200 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1201
1202 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1203 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1204
1205done:
1da177e4
LT		 1206 hci_req_unlock(hdev);
1207 hci_dev_put(hdev);
1208 return ret;
1209}
1210
1211int hci_dev_reset_stat(__u16 dev)
1212{
1213 struct hci_dev *hdev;
1214 int ret = 0;
1215
70f23020
AE		 1216 hdev = hci_dev_get(dev);
1217 if (!hdev)
1da177e4
LT		 1218 return -ENODEV;
1219
1220 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1221
1222 hci_dev_put(hdev);
1223
1224 return ret;
1225}
1226
1227int hci_dev_cmd(unsigned int cmd, void __user *arg)
1228{
1229 struct hci_dev *hdev;
1230 struct hci_dev_req dr;
1231 int err = 0;
1232
1233 if (copy_from_user(&dr, arg, sizeof(dr)))
1234 return -EFAULT;
1235
70f23020
AE		 1236 hdev = hci_dev_get(dr.dev_id);
1237 if (!hdev)
1da177e4
LT		 1238 return -ENODEV;
1239
1240 switch (cmd) {
1241 case HCISETAUTH:
01178cd4
JH		 1242 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1243 HCI_INIT_TIMEOUT);
1da177e4
LT		 1244 break;
1245
1246 case HCISETENCRYPT:
1247 if (!lmp_encrypt_capable(hdev)) {
1248 err = -EOPNOTSUPP;
1249 break;
1250 }
1251
1252 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1253 /* Auth must be enabled first */
01178cd4
JH		 1254 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1255 HCI_INIT_TIMEOUT);
1da177e4
LT		 1256 if (err)
1257 break;
1258 }
1259
01178cd4
JH		 1260 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1261 HCI_INIT_TIMEOUT);
1da177e4
LT		 1262 break;
1263
1264 case HCISETSCAN:
01178cd4
JH		 1265 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1266 HCI_INIT_TIMEOUT);
1da177e4
LT		 1267 break;
1268
1da177e4 1269 case HCISETLINKPOL:
01178cd4
JH		 1270 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1271 HCI_INIT_TIMEOUT);
1da177e4
LT		 1272 break;
1273
1274 case HCISETLINKMODE:
e4e8e37c
MH		 1275 hdev->link_mode = ((__u16) dr.dev_opt) &
1276 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1277 break;
1278
1279 case HCISETPTYPE:
1280 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1281 break;
1282
1283 case HCISETACLMTU:
e4e8e37c
MH		 1284 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1285 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1286 break;
1287
1288 case HCISETSCOMTU:
e4e8e37c
MH		 1289 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1290 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1291 break;
1292
1293 default:
1294 err = -EINVAL;
1295 break;
1296 }
e4e8e37c 1297
1da177e4
LT		 1298 hci_dev_put(hdev);
1299 return err;
1300}
1301
1302int hci_get_dev_list(void __user *arg)
1303{
8035ded4 1304 struct hci_dev *hdev;
1da177e4
LT		 1305 struct hci_dev_list_req *dl;
1306 struct hci_dev_req *dr;
1da177e4
LT		 1307 int n = 0, size, err;
1308 __u16 dev_num;
1309
1310 if (get_user(dev_num, (__u16 __user *) arg))
1311 return -EFAULT;
1312
1313 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1314 return -EINVAL;
1315
1316 size = sizeof(*dl) + dev_num * sizeof(*dr);
1317
70f23020
AE		 1318 dl = kzalloc(size, GFP_KERNEL);
1319 if (!dl)
1da177e4
LT		 1320 return -ENOMEM;
1321
1322 dr = dl->dev_req;
1323
f20d09d5 1324 read_lock(&hci_dev_list_lock);
8035ded4 1325 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1326 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1327 cancel_delayed_work(&hdev->power_off);
c542a06c 1328
a8b2d5c2
JH		 1329 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1330 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1331
1da177e4
LT		 1332 (dr + n)->dev_id = hdev->id;
1333 (dr + n)->dev_opt = hdev->flags;
c542a06c 1334
1da177e4
LT		 1335 if (++n >= dev_num)
1336 break;
1337 }
f20d09d5 1338 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1339
1340 dl->dev_num = n;
1341 size = sizeof(*dl) + n * sizeof(*dr);
1342
1343 err = copy_to_user(arg, dl, size);
1344 kfree(dl);
1345
1346 return err ? -EFAULT : 0;
1347}
1348
1349int hci_get_dev_info(void __user *arg)
1350{
1351 struct hci_dev *hdev;
1352 struct hci_dev_info di;
1353 int err = 0;
1354
1355 if (copy_from_user(&di, arg, sizeof(di)))
1356 return -EFAULT;
1357
70f23020
AE		 1358 hdev = hci_dev_get(di.dev_id);
1359 if (!hdev)
1da177e4
LT		 1360 return -ENODEV;
1361
a8b2d5c2 1362 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1363 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1364
a8b2d5c2
JH		 1365 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1366 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1367
1da177e4
LT		 1368 strcpy(di.name, hdev->name);
1369 di.bdaddr = hdev->bdaddr;
943da25d 1370 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1371 di.flags = hdev->flags;
1372 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1373 if (lmp_bredr_capable(hdev)) {
1374 di.acl_mtu = hdev->acl_mtu;
1375 di.acl_pkts = hdev->acl_pkts;
1376 di.sco_mtu = hdev->sco_mtu;
1377 di.sco_pkts = hdev->sco_pkts;
1378 } else {
1379 di.acl_mtu = hdev->le_mtu;
1380 di.acl_pkts = hdev->le_pkts;
1381 di.sco_mtu = 0;
1382 di.sco_pkts = 0;
1383 }
1da177e4
LT		 1384 di.link_policy = hdev->link_policy;
1385 di.link_mode = hdev->link_mode;
1386
1387 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1388 memcpy(&di.features, &hdev->features, sizeof(di.features));
1389
1390 if (copy_to_user(arg, &di, sizeof(di)))
1391 err = -EFAULT;
1392
1393 hci_dev_put(hdev);
1394
1395 return err;
1396}
1397
1398/* ---- Interface to HCI drivers ---- */
1399
611b30f7
MH		 1400static int hci_rfkill_set_block(void *data, bool blocked)
1401{
1402 struct hci_dev *hdev = data;
1403
1404 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1405
1406 if (!blocked)
1407 return 0;
1408
1409 hci_dev_do_close(hdev);
1410
1411 return 0;
1412}
1413
1414static const struct rfkill_ops hci_rfkill_ops = {
1415 .set_block = hci_rfkill_set_block,
1416};
1417
ab81cbf9
JH		 1418static void hci_power_on(struct work_struct *work)
1419{
1420 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1421
1422 BT_DBG("%s", hdev->name);
1423
1424 if (hci_dev_open(hdev->id) < 0)
1425 return;
1426
a8b2d5c2 1427 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1428 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1429 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1430
a8b2d5c2 1431 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1432 mgmt_index_added(hdev);
ab81cbf9
JH		 1433}
1434
1435static void hci_power_off(struct work_struct *work)
1436{
3243553f 1437 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1438 power_off.work);
ab81cbf9
JH		 1439
1440 BT_DBG("%s", hdev->name);
1441
8ee56540 1442 hci_dev_do_close(hdev);
ab81cbf9
JH		 1443}
1444
16ab91ab
JH		 1445static void hci_discov_off(struct work_struct *work)
1446{
1447 struct hci_dev *hdev;
1448 u8 scan = SCAN_PAGE;
1449
1450 hdev = container_of(work, struct hci_dev, discov_off.work);
1451
1452 BT_DBG("%s", hdev->name);
1453
09fd0de5 1454 hci_dev_lock(hdev);
16ab91ab
JH		 1455
1456 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1457
1458 hdev->discov_timeout = 0;
1459
09fd0de5 1460 hci_dev_unlock(hdev);
16ab91ab
JH		 1461}
1462
2aeb9a1a
JH		 1463int hci_uuids_clear(struct hci_dev *hdev)
1464{
4821002c 1465 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1466
4821002c
JH		 1467 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1468 list_del(&uuid->list);
2aeb9a1a
JH		 1469 kfree(uuid);
1470 }
1471
1472 return 0;
1473}
1474
55ed8ca1
JH		 1475int hci_link_keys_clear(struct hci_dev *hdev)
1476{
1477 struct list_head *p, *n;
1478
1479 list_for_each_safe(p, n, &hdev->link_keys) {
1480 struct link_key *key;
1481
1482 key = list_entry(p, struct link_key, list);
1483
1484 list_del(p);
1485 kfree(key);
1486 }
1487
1488 return 0;
1489}
1490
b899efaf
VCG		 1491int hci_smp_ltks_clear(struct hci_dev *hdev)
1492{
1493 struct smp_ltk *k, *tmp;
1494
1495 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1496 list_del(&k->list);
1497 kfree(k);
1498 }
1499
1500 return 0;
1501}
1502
55ed8ca1
JH		 1503struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1504{
8035ded4 1505 struct link_key *k;
55ed8ca1 1506
8035ded4 1507 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1508 if (bacmp(bdaddr, &k->bdaddr) == 0)
1509 return k;
55ed8ca1
JH		 1510
1511 return NULL;
1512}
1513
745c0ce3 1514static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1515 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1516{
1517 /* Legacy key */
1518 if (key_type < 0x03)
745c0ce3 1519 return true;
d25e28ab
JH		 1520
1521 /* Debug keys are insecure so don't store them persistently */
1522 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1523 return false;
d25e28ab
JH		 1524
1525 /* Changed combination key and there's no previous one */
1526 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1527 return false;
d25e28ab
JH		 1528
1529 /* Security mode 3 case */
1530 if (!conn)
745c0ce3 1531 return true;
d25e28ab
JH		 1532
1533 /* Neither local nor remote side had no-bonding as requirement */
1534 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1535 return true;
d25e28ab
JH		 1536
1537 /* Local side had dedicated bonding as requirement */
1538 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1539 return true;
d25e28ab
JH		 1540
1541 /* Remote side had dedicated bonding as requirement */
1542 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1543 return true;
d25e28ab
JH		 1544
1545 /* If none of the above criteria match, then don't store the key
1546 * persistently */
745c0ce3 1547 return false;
d25e28ab
JH		 1548}
1549
c9839a11 1550struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1551{
c9839a11 1552 struct smp_ltk *k;
75d262c2 1553
c9839a11
VCG		 1554 list_for_each_entry(k, &hdev->long_term_keys, list) {
1555 if (k->ediv != ediv ||
a8c5fb1a 1556 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1557 continue;
1558
c9839a11 1559 return k;
75d262c2
VCG		 1560 }
1561
1562 return NULL;
1563}
75d262c2 1564
c9839a11 1565struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1566 u8 addr_type)
75d262c2 1567{
c9839a11 1568 struct smp_ltk *k;
75d262c2 1569
c9839a11
VCG		 1570 list_for_each_entry(k, &hdev->long_term_keys, list)
1571 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1572 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1573 return k;
1574
1575 return NULL;
1576}
75d262c2 1577
d25e28ab 1578int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1579 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1580{
1581 struct link_key *key, *old_key;
745c0ce3
VA		 1582 u8 old_key_type;
1583 bool persistent;
55ed8ca1
JH		 1584
1585 old_key = hci_find_link_key(hdev, bdaddr);
1586 if (old_key) {
1587 old_key_type = old_key->type;
1588 key = old_key;
1589 } else {
12adcf3a 1590 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1591 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1592 if (!key)
1593 return -ENOMEM;
1594 list_add(&key->list, &hdev->link_keys);
1595 }
1596
6ed93dc6 1597 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1598
d25e28ab
JH		 1599 /* Some buggy controller combinations generate a changed
1600 * combination key for legacy pairing even when there's no
1601 * previous key */
1602 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1603 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1604 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1605 if (conn)
1606 conn->key_type = type;
1607 }
d25e28ab 1608
55ed8ca1 1609 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1610 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1611 key->pin_len = pin_len;
1612
b6020ba0 1613 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1614 key->type = old_key_type;
4748fed2
JH		 1615 else
1616 key->type = type;
1617
4df378a1
JH		 1618 if (!new_key)
1619 return 0;
1620
1621 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1622
744cf19e 1623 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1624
6ec5bcad
VA		 1625 if (conn)
1626 conn->flush_key = !persistent;
55ed8ca1
JH		 1627
1628 return 0;
1629}
1630
c9839a11 1631int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1632 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1633 ediv, u8 rand[8])
75d262c2 1634{
c9839a11 1635 struct smp_ltk *key, *old_key;
75d262c2 1636
c9839a11
VCG		 1637 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1638 return 0;
75d262c2 1639
c9839a11
VCG		 1640 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1641 if (old_key)
75d262c2 1642 key = old_key;
c9839a11
VCG		 1643 else {
1644 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1645 if (!key)
1646 return -ENOMEM;
c9839a11 1647 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1648 }
1649
75d262c2 1650 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1651 key->bdaddr_type = addr_type;
1652 memcpy(key->val, tk, sizeof(key->val));
1653 key->authenticated = authenticated;
1654 key->ediv = ediv;
1655 key->enc_size = enc_size;
1656 key->type = type;
1657 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1658
c9839a11
VCG		 1659 if (!new_key)
1660 return 0;
75d262c2 1661
261cc5aa
VCG		 1662 if (type & HCI_SMP_LTK)
1663 mgmt_new_ltk(hdev, key, 1);
1664
75d262c2
VCG		 1665 return 0;
1666}
1667
55ed8ca1
JH		 1668int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1669{
1670 struct link_key *key;
1671
1672 key = hci_find_link_key(hdev, bdaddr);
1673 if (!key)
1674 return -ENOENT;
1675
6ed93dc6 1676 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1677
1678 list_del(&key->list);
1679 kfree(key);
1680
1681 return 0;
1682}
1683
b899efaf
VCG		 1684int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1685{
1686 struct smp_ltk *k, *tmp;
1687
1688 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1689 if (bacmp(bdaddr, &k->bdaddr))
1690 continue;
1691
6ed93dc6 1692 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1693
1694 list_del(&k->list);
1695 kfree(k);
1696 }
1697
1698 return 0;
1699}
1700
6bd32326 1701/* HCI command timer function */
bda4f23a 1702static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1703{
1704 struct hci_dev *hdev = (void *) arg;
1705
bda4f23a
AE		 1706 if (hdev->sent_cmd) {
1707 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1708 u16 opcode = __le16_to_cpu(sent->opcode);
1709
1710 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1711 } else {
1712 BT_ERR("%s command tx timeout", hdev->name);
1713 }
1714
6bd32326 1715 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1716 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1717}
1718
2763eda6 1719struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1720 bdaddr_t *bdaddr)
2763eda6
SJ		 1721{
1722 struct oob_data *data;
1723
1724 list_for_each_entry(data, &hdev->remote_oob_data, list)
1725 if (bacmp(bdaddr, &data->bdaddr) == 0)
1726 return data;
1727
1728 return NULL;
1729}
1730
1731int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1732{
1733 struct oob_data *data;
1734
1735 data = hci_find_remote_oob_data(hdev, bdaddr);
1736 if (!data)
1737 return -ENOENT;
1738
6ed93dc6 1739 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1740
1741 list_del(&data->list);
1742 kfree(data);
1743
1744 return 0;
1745}
1746
1747int hci_remote_oob_data_clear(struct hci_dev *hdev)
1748{
1749 struct oob_data *data, *n;
1750
1751 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1752 list_del(&data->list);
1753 kfree(data);
1754 }
1755
1756 return 0;
1757}
1758
1759int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1760 u8 *randomizer)
2763eda6
SJ		 1761{
1762 struct oob_data *data;
1763
1764 data = hci_find_remote_oob_data(hdev, bdaddr);
1765
1766 if (!data) {
1767 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1768 if (!data)
1769 return -ENOMEM;
1770
1771 bacpy(&data->bdaddr, bdaddr);
1772 list_add(&data->list, &hdev->remote_oob_data);
1773 }
1774
1775 memcpy(data->hash, hash, sizeof(data->hash));
1776 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1777
6ed93dc6 1778 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1779
1780 return 0;
1781}
1782
04124681 1783struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1784{
8035ded4 1785 struct bdaddr_list *b;
b2a66aad 1786
8035ded4 1787 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1788 if (bacmp(bdaddr, &b->bdaddr) == 0)
1789 return b;
b2a66aad
AJ		 1790
1791 return NULL;
1792}
1793
1794int hci_blacklist_clear(struct hci_dev *hdev)
1795{
1796 struct list_head *p, *n;
1797
1798 list_for_each_safe(p, n, &hdev->blacklist) {
1799 struct bdaddr_list *b;
1800
1801 b = list_entry(p, struct bdaddr_list, list);
1802
1803 list_del(p);
1804 kfree(b);
1805 }
1806
1807 return 0;
1808}
1809
88c1fe4b 1810int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1811{
1812 struct bdaddr_list *entry;
b2a66aad
AJ		 1813
1814 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1815 return -EBADF;
1816
5e762444
AJ		 1817 if (hci_blacklist_lookup(hdev, bdaddr))
1818 return -EEXIST;
b2a66aad
AJ		 1819
1820 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1821 if (!entry)
1822 return -ENOMEM;
b2a66aad
AJ		 1823
1824 bacpy(&entry->bdaddr, bdaddr);
1825
1826 list_add(&entry->list, &hdev->blacklist);
1827
88c1fe4b 1828 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1829}
1830
88c1fe4b 1831int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1832{
1833 struct bdaddr_list *entry;
b2a66aad 1834
1ec918ce 1835 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1836 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1837
1838 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1839 if (!entry)
5e762444 1840 return -ENOENT;
b2a66aad
AJ		 1841
1842 list_del(&entry->list);
1843 kfree(entry);
1844
88c1fe4b 1845 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1846}
1847
42c6b129 1848static void le_scan_param_req(struct hci_request *req, unsigned long opt)
7ba8b4be
AG		 1849{
1850 struct le_scan_params *param = (struct le_scan_params *) opt;
1851 struct hci_cp_le_set_scan_param cp;
1852
1853 memset(&cp, 0, sizeof(cp));
1854 cp.type = param->type;
1855 cp.interval = cpu_to_le16(param->interval);
1856 cp.window = cpu_to_le16(param->window);
1857
42c6b129 1858 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
7ba8b4be
AG		 1859}
1860
42c6b129 1861static void le_scan_enable_req(struct hci_request *req, unsigned long opt)
7ba8b4be
AG		 1862{
1863 struct hci_cp_le_set_scan_enable cp;
1864
1865 memset(&cp, 0, sizeof(cp));
1866 cp.enable = 1;
0431a43c 1867 cp.filter_dup = 1;
7ba8b4be 1868
42c6b129 1869 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
7ba8b4be
AG		 1870}
1871
1872static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1873 u16 window, int timeout)
7ba8b4be
AG		 1874{
1875 long timeo = msecs_to_jiffies(3000);
1876 struct le_scan_params param;
1877 int err;
1878
1879 BT_DBG("%s", hdev->name);
1880
1881 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1882 return -EINPROGRESS;
1883
1884 param.type = type;
1885 param.interval = interval;
1886 param.window = window;
1887
1888 hci_req_lock(hdev);
1889
01178cd4
JH		 1890 err = __hci_req_sync(hdev, le_scan_param_req, (unsigned long) &param,
1891 timeo);
7ba8b4be 1892 if (!err)
01178cd4 1893 err = __hci_req_sync(hdev, le_scan_enable_req, 0, timeo);
7ba8b4be
AG		 1894
1895 hci_req_unlock(hdev);
1896
1897 if (err < 0)
1898 return err;
1899
46818ed5
JH		 1900 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
1901 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1902
1903 return 0;
1904}
1905
7dbfac1d
AG		 1906int hci_cancel_le_scan(struct hci_dev *hdev)
1907{
1908 BT_DBG("%s", hdev->name);
1909
1910 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1911 return -EALREADY;
1912
1913 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1914 struct hci_cp_le_set_scan_enable cp;
1915
1916 /* Send HCI command to disable LE Scan */
1917 memset(&cp, 0, sizeof(cp));
1918 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1919 }
1920
1921 return 0;
1922}
1923
7ba8b4be
AG		 1924static void le_scan_disable_work(struct work_struct *work)
1925{
1926 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1927 le_scan_disable.work);
7ba8b4be
AG		 1928 struct hci_cp_le_set_scan_enable cp;
1929
1930 BT_DBG("%s", hdev->name);
1931
1932 memset(&cp, 0, sizeof(cp));
1933
1934 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1935}
1936
28b75a89
AG		 1937static void le_scan_work(struct work_struct *work)
1938{
1939 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1940 struct le_scan_params *param = &hdev->le_scan_params;
1941
1942 BT_DBG("%s", hdev->name);
1943
04124681
GP		 1944 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1945 param->timeout);
28b75a89
AG		 1946}
1947
1948int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1949 int timeout)
28b75a89
AG		 1950{
1951 struct le_scan_params *param = &hdev->le_scan_params;
1952
1953 BT_DBG("%s", hdev->name);
1954
f1550478
JH		 1955 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1956 return -ENOTSUPP;
1957
28b75a89
AG		 1958 if (work_busy(&hdev->le_scan))
1959 return -EINPROGRESS;
1960
1961 param->type = type;
1962 param->interval = interval;
1963 param->window = window;
1964 param->timeout = timeout;
1965
1966 queue_work(system_long_wq, &hdev->le_scan);
1967
1968 return 0;
1969}
1970
9be0dab7
DH		 1971/* Alloc HCI device */
1972struct hci_dev *hci_alloc_dev(void)
1973{
1974 struct hci_dev *hdev;
1975
1976 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1977 if (!hdev)
1978 return NULL;
1979
b1b813d4
DH		 1980 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1981 hdev->esco_type = (ESCO_HV1);
1982 hdev->link_mode = (HCI_LM_ACCEPT);
1983 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 1984 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
1985 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 1986
b1b813d4
DH		 1987 hdev->sniff_max_interval = 800;
1988 hdev->sniff_min_interval = 80;
1989
1990 mutex_init(&hdev->lock);
1991 mutex_init(&hdev->req_lock);
1992
1993 INIT_LIST_HEAD(&hdev->mgmt_pending);
1994 INIT_LIST_HEAD(&hdev->blacklist);
1995 INIT_LIST_HEAD(&hdev->uuids);
1996 INIT_LIST_HEAD(&hdev->link_keys);
1997 INIT_LIST_HEAD(&hdev->long_term_keys);
1998 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 1999 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2000
2001 INIT_WORK(&hdev->rx_work, hci_rx_work);
2002 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2003 INIT_WORK(&hdev->tx_work, hci_tx_work);
2004 INIT_WORK(&hdev->power_on, hci_power_on);
2005 INIT_WORK(&hdev->le_scan, le_scan_work);
2006
b1b813d4
DH		 2007 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2008 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2009 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2010
9be0dab7 2011 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 2012 skb_queue_head_init(&hdev->rx_q);
2013 skb_queue_head_init(&hdev->cmd_q);
2014 skb_queue_head_init(&hdev->raw_q);
2015
2016 init_waitqueue_head(&hdev->req_wait_q);
2017
bda4f23a 2018 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2019
b1b813d4
DH		 2020 hci_init_sysfs(hdev);
2021 discovery_init(hdev);
9be0dab7
DH		 2022
2023 return hdev;
2024}
2025EXPORT_SYMBOL(hci_alloc_dev);
2026
2027/* Free HCI device */
2028void hci_free_dev(struct hci_dev *hdev)
2029{
2030 skb_queue_purge(&hdev->driver_init);
2031
2032 /* will free via device release */
2033 put_device(&hdev->dev);
2034}
2035EXPORT_SYMBOL(hci_free_dev);
2036
1da177e4
LT		 2037/* Register HCI device */
2038int hci_register_dev(struct hci_dev *hdev)
2039{
b1b813d4 2040 int id, error;
1da177e4 2041
010666a1 2042 if (!hdev->open || !hdev->close)
1da177e4
LT		 2043 return -EINVAL;
2044
08add513
MM		 2045 /* Do not allow HCI_AMP devices to register at index 0,
2046 * so the index can be used as the AMP controller ID.
2047 */
3df92b31
SL		 2048 switch (hdev->dev_type) {
2049 case HCI_BREDR:
2050 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2051 break;
2052 case HCI_AMP:
2053 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2054 break;
2055 default:
2056 return -EINVAL;
1da177e4 2057 }
8e87d142 2058
3df92b31
SL		 2059 if (id < 0)
2060 return id;
2061
1da177e4
LT		 2062 sprintf(hdev->name, "hci%d", id);
2063 hdev->id = id;
2d8b3a11
AE		 2064
2065 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2066
3df92b31
SL		 2067 write_lock(&hci_dev_list_lock);
2068 list_add(&hdev->list, &hci_dev_list);
f20d09d5 2069 write_unlock(&hci_dev_list_lock);
1da177e4 2070
32845eb1 2071 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 2072 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 2073 if (!hdev->workqueue) {
2074 error = -ENOMEM;
2075 goto err;
2076 }
f48fd9c8 2077
6ead1bbc
JH		 2078 hdev->req_workqueue = alloc_workqueue(hdev->name,
2079 WQ_HIGHPRI | WQ_UNBOUND |
2080 WQ_MEM_RECLAIM, 1);
2081 if (!hdev->req_workqueue) {
2082 destroy_workqueue(hdev->workqueue);
2083 error = -ENOMEM;
2084 goto err;
2085 }
2086
33ca954d
DH		 2087 error = hci_add_sysfs(hdev);
2088 if (error < 0)
2089 goto err_wqueue;
1da177e4 2090
611b30f7 2091 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2092 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2093 hdev);
611b30f7
MH		 2094 if (hdev->rfkill) {
2095 if (rfkill_register(hdev->rfkill) < 0) {
2096 rfkill_destroy(hdev->rfkill);
2097 hdev->rfkill = NULL;
2098 }
2099 }
2100
a8b2d5c2 2101 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 2102
2103 if (hdev->dev_type != HCI_AMP)
2104 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2105
1da177e4 2106 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2107 hci_dev_hold(hdev);
1da177e4 2108
19202573 2109 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2110
1da177e4 2111 return id;
f48fd9c8 2112
33ca954d
DH		 2113err_wqueue:
2114 destroy_workqueue(hdev->workqueue);
6ead1bbc 2115 destroy_workqueue(hdev->req_workqueue);
33ca954d 2116err:
3df92b31 2117 ida_simple_remove(&hci_index_ida, hdev->id);
f20d09d5 2118 write_lock(&hci_dev_list_lock);
f48fd9c8 2119 list_del(&hdev->list);
f20d09d5 2120 write_unlock(&hci_dev_list_lock);
f48fd9c8 2121
33ca954d 2122 return error;
1da177e4
LT		 2123}
2124EXPORT_SYMBOL(hci_register_dev);
2125
2126/* Unregister HCI device */
59735631 2127void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2128{
3df92b31 2129 int i, id;
ef222013 2130
c13854ce 2131 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2132
94324962
JH		 2133 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2134
3df92b31
SL		 2135 id = hdev->id;
2136
f20d09d5 2137 write_lock(&hci_dev_list_lock);
1da177e4 2138 list_del(&hdev->list);
f20d09d5 2139 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2140
2141 hci_dev_do_close(hdev);
2142
cd4c5391 2143 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2144 kfree_skb(hdev->reassembly[i]);
2145
b9b5ef18
GP		 2146 cancel_work_sync(&hdev->power_on);
2147
ab81cbf9 2148 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2149 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2150 hci_dev_lock(hdev);
744cf19e 2151 mgmt_index_removed(hdev);
09fd0de5 2152 hci_dev_unlock(hdev);
56e5cb86 2153 }
ab81cbf9 2154
2e58ef3e
JH		 2155 /* mgmt_index_removed should take care of emptying the
2156 * pending list */
2157 BUG_ON(!list_empty(&hdev->mgmt_pending));
2158
1da177e4
LT		 2159 hci_notify(hdev, HCI_DEV_UNREG);
2160
611b30f7
MH		 2161 if (hdev->rfkill) {
2162 rfkill_unregister(hdev->rfkill);
2163 rfkill_destroy(hdev->rfkill);
2164 }
2165
ce242970 2166 hci_del_sysfs(hdev);
147e2d59 2167
f48fd9c8 2168 destroy_workqueue(hdev->workqueue);
6ead1bbc 2169 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2170
09fd0de5 2171 hci_dev_lock(hdev);
e2e0cacb 2172 hci_blacklist_clear(hdev);
2aeb9a1a 2173 hci_uuids_clear(hdev);
55ed8ca1 2174 hci_link_keys_clear(hdev);
b899efaf 2175 hci_smp_ltks_clear(hdev);
2763eda6 2176 hci_remote_oob_data_clear(hdev);
09fd0de5 2177 hci_dev_unlock(hdev);
e2e0cacb 2178
dc946bd8 2179 hci_dev_put(hdev);
3df92b31
SL		 2180
2181 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2182}
2183EXPORT_SYMBOL(hci_unregister_dev);
2184
2185/* Suspend HCI device */
2186int hci_suspend_dev(struct hci_dev *hdev)
2187{
2188 hci_notify(hdev, HCI_DEV_SUSPEND);
2189 return 0;
2190}
2191EXPORT_SYMBOL(hci_suspend_dev);
2192
2193/* Resume HCI device */
2194int hci_resume_dev(struct hci_dev *hdev)
2195{
2196 hci_notify(hdev, HCI_DEV_RESUME);
2197 return 0;
2198}
2199EXPORT_SYMBOL(hci_resume_dev);
2200
76bca880
MH		 2201/* Receive frame from HCI drivers */
2202int hci_recv_frame(struct sk_buff *skb)
2203{
2204 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2205 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2206 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2207 kfree_skb(skb);
2208 return -ENXIO;
2209 }
2210
d82603c6 2211 /* Incoming skb */
76bca880
MH		 2212 bt_cb(skb)->incoming = 1;
2213
2214 /* Time stamp */
2215 __net_timestamp(skb);
2216
76bca880 2217 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2218 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2219
76bca880
MH		 2220 return 0;
2221}
2222EXPORT_SYMBOL(hci_recv_frame);
2223
33e882a5 2224static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2225 int count, __u8 index)
33e882a5
SS		 2226{
2227 int len = 0;
2228 int hlen = 0;
2229 int remain = count;
2230 struct sk_buff *skb;
2231 struct bt_skb_cb *scb;
2232
2233 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2234 index >= NUM_REASSEMBLY)
33e882a5
SS		 2235 return -EILSEQ;
2236
2237 skb = hdev->reassembly[index];
2238
2239 if (!skb) {
2240 switch (type) {
2241 case HCI_ACLDATA_PKT:
2242 len = HCI_MAX_FRAME_SIZE;
2243 hlen = HCI_ACL_HDR_SIZE;
2244 break;
2245 case HCI_EVENT_PKT:
2246 len = HCI_MAX_EVENT_SIZE;
2247 hlen = HCI_EVENT_HDR_SIZE;
2248 break;
2249 case HCI_SCODATA_PKT:
2250 len = HCI_MAX_SCO_SIZE;
2251 hlen = HCI_SCO_HDR_SIZE;
2252 break;
2253 }
2254
1e429f38 2255 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2256 if (!skb)
2257 return -ENOMEM;
2258
2259 scb = (void *) skb->cb;
2260 scb->expect = hlen;
2261 scb->pkt_type = type;
2262
2263 skb->dev = (void *) hdev;
2264 hdev->reassembly[index] = skb;
2265 }
2266
2267 while (count) {
2268 scb = (void *) skb->cb;
89bb46d0 2269 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2270
2271 memcpy(skb_put(skb, len), data, len);
2272
2273 count -= len;
2274 data += len;
2275 scb->expect -= len;
2276 remain = count;
2277
2278 switch (type) {
2279 case HCI_EVENT_PKT:
2280 if (skb->len == HCI_EVENT_HDR_SIZE) {
2281 struct hci_event_hdr *h = hci_event_hdr(skb);
2282 scb->expect = h->plen;
2283
2284 if (skb_tailroom(skb) < scb->expect) {
2285 kfree_skb(skb);
2286 hdev->reassembly[index] = NULL;
2287 return -ENOMEM;
2288 }
2289 }
2290 break;
2291
2292 case HCI_ACLDATA_PKT:
2293 if (skb->len == HCI_ACL_HDR_SIZE) {
2294 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2295 scb->expect = __le16_to_cpu(h->dlen);
2296
2297 if (skb_tailroom(skb) < scb->expect) {
2298 kfree_skb(skb);
2299 hdev->reassembly[index] = NULL;
2300 return -ENOMEM;
2301 }
2302 }
2303 break;
2304
2305 case HCI_SCODATA_PKT:
2306 if (skb->len == HCI_SCO_HDR_SIZE) {
2307 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2308 scb->expect = h->dlen;
2309
2310 if (skb_tailroom(skb) < scb->expect) {
2311 kfree_skb(skb);
2312 hdev->reassembly[index] = NULL;
2313 return -ENOMEM;
2314 }
2315 }
2316 break;
2317 }
2318
2319 if (scb->expect == 0) {
2320 /* Complete frame */
2321
2322 bt_cb(skb)->pkt_type = type;
2323 hci_recv_frame(skb);
2324
2325 hdev->reassembly[index] = NULL;
2326 return remain;
2327 }
2328 }
2329
2330 return remain;
2331}
2332
ef222013
MH		 2333int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2334{
f39a3c06
SS		 2335 int rem = 0;
2336
ef222013
MH		 2337 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2338 return -EILSEQ;
2339
da5f6c37 2340 while (count) {
1e429f38 2341 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2342 if (rem < 0)
2343 return rem;
ef222013 2344
f39a3c06
SS		 2345 data += (count - rem);
2346 count = rem;
f81c6224 2347 }
ef222013 2348
f39a3c06 2349 return rem;
ef222013
MH		 2350}
2351EXPORT_SYMBOL(hci_recv_fragment);
2352
99811510
SS		 2353#define STREAM_REASSEMBLY 0
2354
2355int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2356{
2357 int type;
2358 int rem = 0;
2359
da5f6c37 2360 while (count) {
99811510
SS		 2361 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2362
2363 if (!skb) {
2364 struct { char type; } *pkt;
2365
2366 /* Start of the frame */
2367 pkt = data;
2368 type = pkt->type;
2369
2370 data++;
2371 count--;
2372 } else
2373 type = bt_cb(skb)->pkt_type;
2374
1e429f38 2375 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2376 STREAM_REASSEMBLY);
99811510
SS		 2377 if (rem < 0)
2378 return rem;
2379
2380 data += (count - rem);
2381 count = rem;
f81c6224 2382 }
99811510
SS		 2383
2384 return rem;
2385}
2386EXPORT_SYMBOL(hci_recv_stream_fragment);
2387
1da177e4
LT		 2388/* ---- Interface to upper protocols ---- */
2389
1da177e4
LT		 2390int hci_register_cb(struct hci_cb *cb)
2391{
2392 BT_DBG("%p name %s", cb, cb->name);
2393
f20d09d5 2394 write_lock(&hci_cb_list_lock);
1da177e4 2395 list_add(&cb->list, &hci_cb_list);
f20d09d5 2396 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2397
2398 return 0;
2399}
2400EXPORT_SYMBOL(hci_register_cb);
2401
2402int hci_unregister_cb(struct hci_cb *cb)
2403{
2404 BT_DBG("%p name %s", cb, cb->name);
2405
f20d09d5 2406 write_lock(&hci_cb_list_lock);
1da177e4 2407 list_del(&cb->list);
f20d09d5 2408 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2409
2410 return 0;
2411}
2412EXPORT_SYMBOL(hci_unregister_cb);
2413
2414static int hci_send_frame(struct sk_buff *skb)
2415{
2416 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2417
2418 if (!hdev) {
2419 kfree_skb(skb);
2420 return -ENODEV;
2421 }
2422
0d48d939 2423 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2424
cd82e61c
MH		 2425 /* Time stamp */
2426 __net_timestamp(skb);
1da177e4 2427
cd82e61c
MH		 2428 /* Send copy to monitor */
2429 hci_send_to_monitor(hdev, skb);
2430
2431 if (atomic_read(&hdev->promisc)) {
2432 /* Send copy to the sockets */
470fe1b5 2433 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2434 }
2435
2436 /* Get rid of skb owner, prior to sending to the driver. */
2437 skb_orphan(skb);
2438
2439 return hdev->send(skb);
2440}
2441
3119ae95
JH		 2442void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2443{
2444 skb_queue_head_init(&req->cmd_q);
2445 req->hdev = hdev;
2446}
2447
2448int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2449{
2450 struct hci_dev *hdev = req->hdev;
2451 struct sk_buff *skb;
2452 unsigned long flags;
2453
2454 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2455
2456 /* Do not allow empty requests */
2457 if (skb_queue_empty(&req->cmd_q))
382b0c39 2458 return -ENODATA;
3119ae95
JH		 2459
2460 skb = skb_peek_tail(&req->cmd_q);
2461 bt_cb(skb)->req.complete = complete;
2462
2463 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2464 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2465 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2466
2467 queue_work(hdev->workqueue, &hdev->cmd_work);
2468
2469 return 0;
2470}
2471
1ca3a9d0
JH		 2472static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
2473 u32 plen, void *param)
1da177e4
LT		 2474{
2475 int len = HCI_COMMAND_HDR_SIZE + plen;
2476 struct hci_command_hdr *hdr;
2477 struct sk_buff *skb;
2478
1da177e4 2479 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2480 if (!skb)
2481 return NULL;
1da177e4
LT		 2482
2483 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2484 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2485 hdr->plen = plen;
2486
2487 if (plen)
2488 memcpy(skb_put(skb, plen), param, plen);
2489
2490 BT_DBG("skb len %d", skb->len);
2491
0d48d939 2492 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2493 skb->dev = (void *) hdev;
c78ae283 2494
1ca3a9d0
JH		 2495 return skb;
2496}
2497
2498/* Send HCI command */
2499int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2500{
2501 struct sk_buff *skb;
2502
2503 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2504
2505 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2506 if (!skb) {
2507 BT_ERR("%s no memory for command", hdev->name);
2508 return -ENOMEM;
2509 }
2510
11714b3d
JH		 2511 /* Stand-alone HCI commands must be flaged as
2512 * single-command requests.
2513 */
2514 bt_cb(skb)->req.start = true;
2515
1da177e4 2516 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2517 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2518
2519 return 0;
2520}
1da177e4 2521
71c76a17
JH		 2522/* Queue a command to an asynchronous HCI request */
2523int hci_req_add(struct hci_request *req, u16 opcode, u32 plen, void *param)
2524{
2525 struct hci_dev *hdev = req->hdev;
2526 struct sk_buff *skb;
2527
2528 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2529
2530 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2531 if (!skb) {
2532 BT_ERR("%s no memory for command", hdev->name);
2533 return -ENOMEM;
2534 }
2535
2536 if (skb_queue_empty(&req->cmd_q))
2537 bt_cb(skb)->req.start = true;
2538
2539 skb_queue_tail(&req->cmd_q, skb);
2540
2541 return 0;
2542}
2543
1da177e4 2544/* Get data from the previously sent command */
a9de9248 2545void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2546{
2547 struct hci_command_hdr *hdr;
2548
2549 if (!hdev->sent_cmd)
2550 return NULL;
2551
2552 hdr = (void *) hdev->sent_cmd->data;
2553
a9de9248 2554 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2555 return NULL;
2556
f0e09510 2557 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2558
2559 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2560}
2561
2562/* Send ACL data */
2563static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2564{
2565 struct hci_acl_hdr *hdr;
2566 int len = skb->len;
2567
badff6d0
ACM		 2568 skb_push(skb, HCI_ACL_HDR_SIZE);
2569 skb_reset_transport_header(skb);
9c70220b 2570 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2571 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2572 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2573}
2574
ee22be7e 2575static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2576 struct sk_buff *skb, __u16 flags)
1da177e4 2577{
ee22be7e 2578 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2579 struct hci_dev *hdev = conn->hdev;
2580 struct sk_buff *list;
2581
087bfd99
GP		 2582 skb->len = skb_headlen(skb);
2583 skb->data_len = 0;
2584
2585 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2586
2587 switch (hdev->dev_type) {
2588 case HCI_BREDR:
2589 hci_add_acl_hdr(skb, conn->handle, flags);
2590 break;
2591 case HCI_AMP:
2592 hci_add_acl_hdr(skb, chan->handle, flags);
2593 break;
2594 default:
2595 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2596 return;
2597 }
087bfd99 2598
70f23020
AE		 2599 list = skb_shinfo(skb)->frag_list;
2600 if (!list) {
1da177e4
LT		 2601 /* Non fragmented */
2602 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2603
73d80deb 2604 skb_queue_tail(queue, skb);
1da177e4
LT		 2605 } else {
2606 /* Fragmented */
2607 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2608
2609 skb_shinfo(skb)->frag_list = NULL;
2610
2611 /* Queue all fragments atomically */
af3e6359 2612 spin_lock(&queue->lock);
1da177e4 2613
73d80deb 2614 __skb_queue_tail(queue, skb);
e702112f
AE		 2615
2616 flags &= ~ACL_START;
2617 flags |= ACL_CONT;
1da177e4
LT		 2618 do {
2619 skb = list; list = list->next;
8e87d142 2620
1da177e4 2621 skb->dev = (void *) hdev;
0d48d939 2622 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2623 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2624
2625 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2626
73d80deb 2627 __skb_queue_tail(queue, skb);
1da177e4
LT		 2628 } while (list);
2629
af3e6359 2630 spin_unlock(&queue->lock);
1da177e4 2631 }
73d80deb
LAD		 2632}
2633
2634void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2635{
ee22be7e 2636 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2637
f0e09510 2638 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2639
2640 skb->dev = (void *) hdev;
73d80deb 2641
ee22be7e 2642 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2643
3eff45ea 2644 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2645}
1da177e4
LT		 2646
2647/* Send SCO data */
0d861d8b 2648void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2649{
2650 struct hci_dev *hdev = conn->hdev;
2651 struct hci_sco_hdr hdr;
2652
2653 BT_DBG("%s len %d", hdev->name, skb->len);
2654
aca3192c 2655 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2656 hdr.dlen = skb->len;
2657
badff6d0
ACM		 2658 skb_push(skb, HCI_SCO_HDR_SIZE);
2659 skb_reset_transport_header(skb);
9c70220b 2660 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2661
2662 skb->dev = (void *) hdev;
0d48d939 2663 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2664
1da177e4 2665 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2666 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2667}
1da177e4
LT		 2668
2669/* ---- HCI TX task (outgoing data) ---- */
2670
2671/* HCI Connection scheduler */
6039aa73
GP		 2672static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2673 int *quote)
1da177e4
LT		 2674{
2675 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2676 struct hci_conn *conn = NULL, *c;
abc5de8f 2677 unsigned int num = 0, min = ~0;
1da177e4 2678
8e87d142 2679 /* We don't have to lock device here. Connections are always
1da177e4 2680 * added and removed with TX task disabled. */
bf4c6325
GP		 2681
2682 rcu_read_lock();
2683
2684 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2685 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2686 continue;
769be974
MH		 2687
2688 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2689 continue;
2690
1da177e4
LT		 2691 num++;
2692
2693 if (c->sent < min) {
2694 min = c->sent;
2695 conn = c;
2696 }
52087a79
LAD		 2697
2698 if (hci_conn_num(hdev, type) == num)
2699 break;
1da177e4
LT		 2700 }
2701
bf4c6325
GP		 2702 rcu_read_unlock();
2703
1da177e4 2704 if (conn) {
6ed58ec5
VT		 2705 int cnt, q;
2706
2707 switch (conn->type) {
2708 case ACL_LINK:
2709 cnt = hdev->acl_cnt;
2710 break;
2711 case SCO_LINK:
2712 case ESCO_LINK:
2713 cnt = hdev->sco_cnt;
2714 break;
2715 case LE_LINK:
2716 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2717 break;
2718 default:
2719 cnt = 0;
2720 BT_ERR("Unknown link type");
2721 }
2722
2723 q = cnt / num;
1da177e4
LT		 2724 *quote = q ? q : 1;
2725 } else
2726 *quote = 0;
2727
2728 BT_DBG("conn %p quote %d", conn, *quote);
2729 return conn;
2730}
2731
6039aa73 2732static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2733{
2734 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2735 struct hci_conn *c;
1da177e4 2736
bae1f5d9 2737 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2738
bf4c6325
GP		 2739 rcu_read_lock();
2740
1da177e4 2741 /* Kill stalled connections */
bf4c6325 2742 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2743 if (c->type == type && c->sent) {
6ed93dc6
AE		 2744 BT_ERR("%s killing stalled connection %pMR",
2745 hdev->name, &c->dst);
bed71748 2746 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2747 }
2748 }
bf4c6325
GP		 2749
2750 rcu_read_unlock();
1da177e4
LT		 2751}
2752
6039aa73
GP		 2753static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2754 int *quote)
1da177e4 2755{
73d80deb
LAD		 2756 struct hci_conn_hash *h = &hdev->conn_hash;
2757 struct hci_chan *chan = NULL;
abc5de8f 2758 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2759 struct hci_conn *conn;
73d80deb
LAD		 2760 int cnt, q, conn_num = 0;
2761
2762 BT_DBG("%s", hdev->name);
2763
bf4c6325
GP		 2764 rcu_read_lock();
2765
2766 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2767 struct hci_chan *tmp;
2768
2769 if (conn->type != type)
2770 continue;
2771
2772 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2773 continue;
2774
2775 conn_num++;
2776
8192edef 2777 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2778 struct sk_buff *skb;
2779
2780 if (skb_queue_empty(&tmp->data_q))
2781 continue;
2782
2783 skb = skb_peek(&tmp->data_q);
2784 if (skb->priority < cur_prio)
2785 continue;
2786
2787 if (skb->priority > cur_prio) {
2788 num = 0;
2789 min = ~0;
2790 cur_prio = skb->priority;
2791 }
2792
2793 num++;
2794
2795 if (conn->sent < min) {
2796 min = conn->sent;
2797 chan = tmp;
2798 }
2799 }
2800
2801 if (hci_conn_num(hdev, type) == conn_num)
2802 break;
2803 }
2804
bf4c6325
GP		 2805 rcu_read_unlock();
2806
73d80deb
LAD		 2807 if (!chan)
2808 return NULL;
2809
2810 switch (chan->conn->type) {
2811 case ACL_LINK:
2812 cnt = hdev->acl_cnt;
2813 break;
bd1eb66b
AE		 2814 case AMP_LINK:
2815 cnt = hdev->block_cnt;
2816 break;
73d80deb
LAD		 2817 case SCO_LINK:
2818 case ESCO_LINK:
2819 cnt = hdev->sco_cnt;
2820 break;
2821 case LE_LINK:
2822 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2823 break;
2824 default:
2825 cnt = 0;
2826 BT_ERR("Unknown link type");
2827 }
2828
2829 q = cnt / num;
2830 *quote = q ? q : 1;
2831 BT_DBG("chan %p quote %d", chan, *quote);
2832 return chan;
2833}
2834
02b20f0b
LAD		 2835static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2836{
2837 struct hci_conn_hash *h = &hdev->conn_hash;
2838 struct hci_conn *conn;
2839 int num = 0;
2840
2841 BT_DBG("%s", hdev->name);
2842
bf4c6325
GP		 2843 rcu_read_lock();
2844
2845 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2846 struct hci_chan *chan;
2847
2848 if (conn->type != type)
2849 continue;
2850
2851 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2852 continue;
2853
2854 num++;
2855
8192edef 2856 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2857 struct sk_buff *skb;
2858
2859 if (chan->sent) {
2860 chan->sent = 0;
2861 continue;
2862 }
2863
2864 if (skb_queue_empty(&chan->data_q))
2865 continue;
2866
2867 skb = skb_peek(&chan->data_q);
2868 if (skb->priority >= HCI_PRIO_MAX - 1)
2869 continue;
2870
2871 skb->priority = HCI_PRIO_MAX - 1;
2872
2873 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2874 skb->priority);
02b20f0b
LAD		 2875 }
2876
2877 if (hci_conn_num(hdev, type) == num)
2878 break;
2879 }
bf4c6325
GP		 2880
2881 rcu_read_unlock();
2882
02b20f0b
LAD		 2883}
2884
b71d385a
AE		 2885static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2886{
2887 /* Calculate count of blocks used by this packet */
2888 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2889}
2890
6039aa73 2891static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2892{
1da177e4
LT		 2893 if (!test_bit(HCI_RAW, &hdev->flags)) {
2894 /* ACL tx timeout must be longer than maximum
2895 * link supervision timeout (40.9 seconds) */
63d2bc1b 2896 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 2897 HCI_ACL_TX_TIMEOUT))
bae1f5d9 2898 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2899 }
63d2bc1b 2900}
1da177e4 2901
6039aa73 2902static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 2903{
2904 unsigned int cnt = hdev->acl_cnt;
2905 struct hci_chan *chan;
2906 struct sk_buff *skb;
2907 int quote;
2908
2909 __check_timeout(hdev, cnt);
04837f64 2910
73d80deb 2911 while (hdev->acl_cnt &&
a8c5fb1a 2912 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2913 u32 priority = (skb_peek(&chan->data_q))->priority;
2914 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2915 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2916 skb->len, skb->priority);
73d80deb 2917
ec1cce24
LAD		 2918 /* Stop if priority has changed */
2919 if (skb->priority < priority)
2920 break;
2921
2922 skb = skb_dequeue(&chan->data_q);
2923
73d80deb 2924 hci_conn_enter_active_mode(chan->conn,
04124681 2925 bt_cb(skb)->force_active);
04837f64 2926
1da177e4
LT		 2927 hci_send_frame(skb);
2928 hdev->acl_last_tx = jiffies;
2929
2930 hdev->acl_cnt--;
73d80deb
LAD		 2931 chan->sent++;
2932 chan->conn->sent++;
1da177e4
LT		 2933 }
2934 }
02b20f0b
LAD		 2935
2936 if (cnt != hdev->acl_cnt)
2937 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2938}
2939
6039aa73 2940static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 2941{
63d2bc1b 2942 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2943 struct hci_chan *chan;
2944 struct sk_buff *skb;
2945 int quote;
bd1eb66b 2946 u8 type;
b71d385a 2947
63d2bc1b 2948 __check_timeout(hdev, cnt);
b71d385a 2949
bd1eb66b
AE		 2950 BT_DBG("%s", hdev->name);
2951
2952 if (hdev->dev_type == HCI_AMP)
2953 type = AMP_LINK;
2954 else
2955 type = ACL_LINK;
2956
b71d385a 2957 while (hdev->block_cnt > 0 &&
bd1eb66b 2958 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 2959 u32 priority = (skb_peek(&chan->data_q))->priority;
2960 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2961 int blocks;
2962
2963 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2964 skb->len, skb->priority);
b71d385a
AE		 2965
2966 /* Stop if priority has changed */
2967 if (skb->priority < priority)
2968 break;
2969
2970 skb = skb_dequeue(&chan->data_q);
2971
2972 blocks = __get_blocks(hdev, skb);
2973 if (blocks > hdev->block_cnt)
2974 return;
2975
2976 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2977 bt_cb(skb)->force_active);
b71d385a
AE		 2978
2979 hci_send_frame(skb);
2980 hdev->acl_last_tx = jiffies;
2981
2982 hdev->block_cnt -= blocks;
2983 quote -= blocks;
2984
2985 chan->sent += blocks;
2986 chan->conn->sent += blocks;
2987 }
2988 }
2989
2990 if (cnt != hdev->block_cnt)
bd1eb66b 2991 hci_prio_recalculate(hdev, type);
b71d385a
AE		 2992}
2993
6039aa73 2994static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 2995{
2996 BT_DBG("%s", hdev->name);
2997
bd1eb66b
AE		 2998 /* No ACL link over BR/EDR controller */
2999 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3000 return;
3001
3002 /* No AMP link over AMP controller */
3003 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3004 return;
3005
3006 switch (hdev->flow_ctl_mode) {
3007 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3008 hci_sched_acl_pkt(hdev);
3009 break;
3010
3011 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3012 hci_sched_acl_blk(hdev);
3013 break;
3014 }
3015}
3016
1da177e4 3017/* Schedule SCO */
6039aa73 3018static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3019{
3020 struct hci_conn *conn;
3021 struct sk_buff *skb;
3022 int quote;
3023
3024 BT_DBG("%s", hdev->name);
3025
52087a79
LAD		 3026 if (!hci_conn_num(hdev, SCO_LINK))
3027 return;
3028
1da177e4
LT		 3029 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3030 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3031 BT_DBG("skb %p len %d", skb, skb->len);
3032 hci_send_frame(skb);
3033
3034 conn->sent++;
3035 if (conn->sent == ~0)
3036 conn->sent = 0;
3037 }
3038 }
3039}
3040
6039aa73 3041static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3042{
3043 struct hci_conn *conn;
3044 struct sk_buff *skb;
3045 int quote;
3046
3047 BT_DBG("%s", hdev->name);
3048
52087a79
LAD		 3049 if (!hci_conn_num(hdev, ESCO_LINK))
3050 return;
3051
8fc9ced3
GP		 3052 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3053 &quote))) {
b6a0dc82
MH		 3054 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3055 BT_DBG("skb %p len %d", skb, skb->len);
3056 hci_send_frame(skb);
3057
3058 conn->sent++;
3059 if (conn->sent == ~0)
3060 conn->sent = 0;
3061 }
3062 }
3063}
3064
6039aa73 3065static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3066{
73d80deb 3067 struct hci_chan *chan;
6ed58ec5 3068 struct sk_buff *skb;
02b20f0b 3069 int quote, cnt, tmp;
6ed58ec5
VT		 3070
3071 BT_DBG("%s", hdev->name);
3072
52087a79
LAD		 3073 if (!hci_conn_num(hdev, LE_LINK))
3074 return;
3075
6ed58ec5
VT		 3076 if (!test_bit(HCI_RAW, &hdev->flags)) {
3077 /* LE tx timeout must be longer than maximum
3078 * link supervision timeout (40.9 seconds) */
bae1f5d9 3079 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3080 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3081 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3082 }
3083
3084 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3085 tmp = cnt;
73d80deb 3086 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3087 u32 priority = (skb_peek(&chan->data_q))->priority;
3088 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3089 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3090 skb->len, skb->priority);
6ed58ec5 3091
ec1cce24
LAD		 3092 /* Stop if priority has changed */
3093 if (skb->priority < priority)
3094 break;
3095
3096 skb = skb_dequeue(&chan->data_q);
3097
6ed58ec5
VT		 3098 hci_send_frame(skb);
3099 hdev->le_last_tx = jiffies;
3100
3101 cnt--;
73d80deb
LAD		 3102 chan->sent++;
3103 chan->conn->sent++;
6ed58ec5
VT		 3104 }
3105 }
73d80deb 3106
6ed58ec5
VT		 3107 if (hdev->le_pkts)
3108 hdev->le_cnt = cnt;
3109 else
3110 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3111
3112 if (cnt != tmp)
3113 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3114}
3115
3eff45ea 3116static void hci_tx_work(struct work_struct *work)
1da177e4 3117{
3eff45ea 3118 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3119 struct sk_buff *skb;
3120
6ed58ec5 3121 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3122 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 3123
3124 /* Schedule queues and send stuff to HCI driver */
3125
3126 hci_sched_acl(hdev);
3127
3128 hci_sched_sco(hdev);
3129
b6a0dc82
MH		 3130 hci_sched_esco(hdev);
3131
6ed58ec5
VT		 3132 hci_sched_le(hdev);
3133
1da177e4
LT		 3134 /* Send next queued raw (unknown type) packet */
3135 while ((skb = skb_dequeue(&hdev->raw_q)))
3136 hci_send_frame(skb);
1da177e4
LT		 3137}
3138
25985edc 3139/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3140
3141/* ACL data packet */
6039aa73 3142static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3143{
3144 struct hci_acl_hdr *hdr = (void *) skb->data;
3145 struct hci_conn *conn;
3146 __u16 handle, flags;
3147
3148 skb_pull(skb, HCI_ACL_HDR_SIZE);
3149
3150 handle = __le16_to_cpu(hdr->handle);
3151 flags = hci_flags(handle);
3152 handle = hci_handle(handle);
3153
f0e09510 3154 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3155 handle, flags);
1da177e4
LT		 3156
3157 hdev->stat.acl_rx++;
3158
3159 hci_dev_lock(hdev);
3160 conn = hci_conn_hash_lookup_handle(hdev, handle);
3161 hci_dev_unlock(hdev);
8e87d142 3162
1da177e4 3163 if (conn) {
65983fc7 3164 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3165
1da177e4 3166 /* Send to upper protocol */
686ebf28
UF		 3167 l2cap_recv_acldata(conn, skb, flags);
3168 return;
1da177e4 3169 } else {
8e87d142 3170 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3171 hdev->name, handle);
1da177e4
LT		 3172 }
3173
3174 kfree_skb(skb);
3175}
3176
3177/* SCO data packet */
6039aa73 3178static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3179{
3180 struct hci_sco_hdr *hdr = (void *) skb->data;
3181 struct hci_conn *conn;
3182 __u16 handle;
3183
3184 skb_pull(skb, HCI_SCO_HDR_SIZE);
3185
3186 handle = __le16_to_cpu(hdr->handle);
3187
f0e09510 3188 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3189
3190 hdev->stat.sco_rx++;
3191
3192 hci_dev_lock(hdev);
3193 conn = hci_conn_hash_lookup_handle(hdev, handle);
3194 hci_dev_unlock(hdev);
3195
3196 if (conn) {
1da177e4 3197 /* Send to upper protocol */
686ebf28
UF		 3198 sco_recv_scodata(conn, skb);
3199 return;
1da177e4 3200 } else {
8e87d142 3201 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3202 hdev->name, handle);
1da177e4
LT		 3203 }
3204
3205 kfree_skb(skb);
3206}
3207
9238f36a
JH		 3208static bool hci_req_is_complete(struct hci_dev *hdev)
3209{
3210 struct sk_buff *skb;
3211
3212 skb = skb_peek(&hdev->cmd_q);
3213 if (!skb)
3214 return true;
3215
3216 return bt_cb(skb)->req.start;
3217}
3218
42c6b129
JH		 3219static void hci_resend_last(struct hci_dev *hdev)
3220{
3221 struct hci_command_hdr *sent;
3222 struct sk_buff *skb;
3223 u16 opcode;
3224
3225 if (!hdev->sent_cmd)
3226 return;
3227
3228 sent = (void *) hdev->sent_cmd->data;
3229 opcode = __le16_to_cpu(sent->opcode);
3230 if (opcode == HCI_OP_RESET)
3231 return;
3232
3233 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3234 if (!skb)
3235 return;
3236
3237 skb_queue_head(&hdev->cmd_q, skb);
3238 queue_work(hdev->workqueue, &hdev->cmd_work);
3239}
3240
9238f36a
JH		 3241void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3242{
3243 hci_req_complete_t req_complete = NULL;
3244 struct sk_buff *skb;
3245 unsigned long flags;
3246
3247 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3248
42c6b129
JH		 3249 /* If the completed command doesn't match the last one that was
3250 * sent we need to do special handling of it.
9238f36a 3251 */
42c6b129
JH		 3252 if (!hci_sent_cmd_data(hdev, opcode)) {
3253 /* Some CSR based controllers generate a spontaneous
3254 * reset complete event during init and any pending
3255 * command will never be completed. In such a case we
3256 * need to resend whatever was the last sent
3257 * command.
3258 */
3259 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3260 hci_resend_last(hdev);
3261
9238f36a 3262 return;
42c6b129 3263 }
9238f36a
JH		 3264
3265 /* If the command succeeded and there's still more commands in
3266 * this request the request is not yet complete.
3267 */
3268 if (!status && !hci_req_is_complete(hdev))
3269 return;
3270
3271 /* If this was the last command in a request the complete
3272 * callback would be found in hdev->sent_cmd instead of the
3273 * command queue (hdev->cmd_q).
3274 */
3275 if (hdev->sent_cmd) {
3276 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
3277 if (req_complete)
3278 goto call_complete;
3279 }
3280
3281 /* Remove all pending commands belonging to this request */
3282 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3283 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3284 if (bt_cb(skb)->req.start) {
3285 __skb_queue_head(&hdev->cmd_q, skb);
3286 break;
3287 }
3288
3289 req_complete = bt_cb(skb)->req.complete;
3290 kfree_skb(skb);
3291 }
3292 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3293
3294call_complete:
3295 if (req_complete)
3296 req_complete(hdev, status);
3297}
3298
3299void hci_req_cmd_status(struct hci_dev *hdev, u16 opcode, u8 status)
3300{
3301 hci_req_complete_t req_complete = NULL;
3302
3303 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3304
3305 if (status) {
3306 hci_req_cmd_complete(hdev, opcode, status);
3307 return;
3308 }
3309
3310 /* No need to handle success status if there are more commands */
3311 if (!hci_req_is_complete(hdev))
3312 return;
3313
3314 if (hdev->sent_cmd)
3315 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
3316
3317 /* If the request doesn't have a complete callback or there
3318 * are other commands/requests in the hdev queue we consider
3319 * this request as completed.
3320 */
3321 if (!req_complete || !skb_queue_empty(&hdev->cmd_q))
3322 hci_req_cmd_complete(hdev, opcode, status);
3323}
3324
b78752cc 3325static void hci_rx_work(struct work_struct *work)
1da177e4 3326{
b78752cc 3327 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3328 struct sk_buff *skb;
3329
3330 BT_DBG("%s", hdev->name);
3331
1da177e4 3332 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3333 /* Send copy to monitor */
3334 hci_send_to_monitor(hdev, skb);
3335
1da177e4
LT		 3336 if (atomic_read(&hdev->promisc)) {
3337 /* Send copy to the sockets */
470fe1b5 3338 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3339 }
3340
3341 if (test_bit(HCI_RAW, &hdev->flags)) {
3342 kfree_skb(skb);
3343 continue;
3344 }
3345
3346 if (test_bit(HCI_INIT, &hdev->flags)) {
3347 /* Don't process data packets in this states. */
0d48d939 3348 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3349 case HCI_ACLDATA_PKT:
3350 case HCI_SCODATA_PKT:
3351 kfree_skb(skb);
3352 continue;
3ff50b79 3353 }
1da177e4
LT		 3354 }
3355
3356 /* Process frame */
0d48d939 3357 switch (bt_cb(skb)->pkt_type) {
1da177e4 3358 case HCI_EVENT_PKT:
b78752cc 3359 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3360 hci_event_packet(hdev, skb);
3361 break;
3362
3363 case HCI_ACLDATA_PKT:
3364 BT_DBG("%s ACL data packet", hdev->name);
3365 hci_acldata_packet(hdev, skb);
3366 break;
3367
3368 case HCI_SCODATA_PKT:
3369 BT_DBG("%s SCO data packet", hdev->name);
3370 hci_scodata_packet(hdev, skb);
3371 break;
3372
3373 default:
3374 kfree_skb(skb);
3375 break;
3376 }
3377 }
1da177e4
LT		 3378}
3379
c347b765 3380static void hci_cmd_work(struct work_struct *work)
1da177e4 3381{
c347b765 3382 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3383 struct sk_buff *skb;
3384
2104786b
AE		 3385 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3386 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3387
1da177e4 3388 /* Send queued commands */
5a08ecce
AE		 3389 if (atomic_read(&hdev->cmd_cnt)) {
3390 skb = skb_dequeue(&hdev->cmd_q);
3391 if (!skb)
3392 return;
3393
7585b97a 3394 kfree_skb(hdev->sent_cmd);
1da177e4 3395
70f23020
AE		 3396 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3397 if (hdev->sent_cmd) {
1da177e4
LT		 3398 atomic_dec(&hdev->cmd_cnt);
3399 hci_send_frame(skb);
7bdb8a5c
SJ		 3400 if (test_bit(HCI_RESET, &hdev->flags))
3401 del_timer(&hdev->cmd_timer);
3402 else
3403 mod_timer(&hdev->cmd_timer,
5f246e89 3404 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3405 } else {
3406 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3407 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3408 }
3409 }
3410}
2519a1fc
AG		 3411
3412int hci_do_inquiry(struct hci_dev *hdev, u8 length)
3413{
3414 /* General inquiry access code (GIAC) */
3415 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3416 struct hci_cp_inquiry cp;
3417
3418 BT_DBG("%s", hdev->name);
3419
3420 if (test_bit(HCI_INQUIRY, &hdev->flags))
3421 return -EINPROGRESS;
3422
4663262c
JH		 3423 inquiry_cache_flush(hdev);
3424
2519a1fc
AG		 3425 memset(&cp, 0, sizeof(cp));
3426 memcpy(&cp.lap, lap, sizeof(cp.lap));
3427 cp.length = length;
3428
3429 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
3430}
023d5049
AG		 3431
3432int hci_cancel_inquiry(struct hci_dev *hdev)
3433{
3434 BT_DBG("%s", hdev->name);
3435
3436 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 3437 return -EALREADY;
023d5049
AG		 3438
3439 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
3440}
31f7956c
AG		 3441
3442u8 bdaddr_to_le(u8 bdaddr_type)
3443{
3444 switch (bdaddr_type) {
3445 case BDADDR_LE_PUBLIC:
3446 return ADDR_LE_DEV_PUBLIC;
3447
3448 default:
3449 /* Fallback to LE Random address type */
3450 return ADDR_LE_DEV_RANDOM;
3451 }
3452}
kernel source for telekom puls (alcatel/mediatek)