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Bluetooth: Remove redundant RFCOMM BT_CLOSED settings
[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
23bb5763 60void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 61{
f0e09510 62 BT_DBG("%s command 0x%4.4x result 0x%2.2x", hdev->name, cmd, result);
23bb5763 63
a5040efa
JH		 64 /* If this is the init phase check if the completed command matches
65 * the last init command, and if not just return.
66 */
75fb0e32
JH		 67 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
68 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1036b890 69 u16 opcode = __le16_to_cpu(sent->opcode);
75fb0e32
JH		 70 struct sk_buff *skb;
71
72 /* Some CSR based controllers generate a spontaneous
73 * reset complete event during init and any pending
74 * command will never be completed. In such a case we
75 * need to resend whatever was the last sent
76 * command.
77 */
78
1036b890 79 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
75fb0e32
JH		 80 return;
81
82 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
83 if (skb) {
84 skb_queue_head(&hdev->cmd_q, skb);
85 queue_work(hdev->workqueue, &hdev->cmd_work);
86 }
87
23bb5763 88 return;
75fb0e32 89 }
1da177e4
LT		 90
91 if (hdev->req_status == HCI_REQ_PEND) {
92 hdev->req_result = result;
93 hdev->req_status = HCI_REQ_DONE;
94 wake_up_interruptible(&hdev->req_wait_q);
95 }
96}
97
98static void hci_req_cancel(struct hci_dev *hdev, int err)
99{
100 BT_DBG("%s err 0x%2.2x", hdev->name, err);
101
102 if (hdev->req_status == HCI_REQ_PEND) {
103 hdev->req_result = err;
104 hdev->req_status = HCI_REQ_CANCELED;
105 wake_up_interruptible(&hdev->req_wait_q);
106 }
107}
108
109/* Execute request and wait for completion. */
a8c5fb1a
GP		 110static int __hci_request(struct hci_dev *hdev,
111 void (*req)(struct hci_dev *hdev, unsigned long opt),
112 unsigned long opt, __u32 timeout)
1da177e4
LT		 113{
114 DECLARE_WAITQUEUE(wait, current);
115 int err = 0;
116
117 BT_DBG("%s start", hdev->name);
118
119 hdev->req_status = HCI_REQ_PEND;
120
121 add_wait_queue(&hdev->req_wait_q, &wait);
122 set_current_state(TASK_INTERRUPTIBLE);
123
124 req(hdev, opt);
125 schedule_timeout(timeout);
126
127 remove_wait_queue(&hdev->req_wait_q, &wait);
128
129 if (signal_pending(current))
130 return -EINTR;
131
132 switch (hdev->req_status) {
133 case HCI_REQ_DONE:
e175072f 134 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 135 break;
136
137 case HCI_REQ_CANCELED:
138 err = -hdev->req_result;
139 break;
140
141 default:
142 err = -ETIMEDOUT;
143 break;
3ff50b79 144 }
1da177e4 145
a5040efa 146 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 147
148 BT_DBG("%s end: err %d", hdev->name, err);
149
150 return err;
151}
152
6039aa73
GP		 153static int hci_request(struct hci_dev *hdev,
154 void (*req)(struct hci_dev *hdev, unsigned long opt),
155 unsigned long opt, __u32 timeout)
1da177e4
LT		 156{
157 int ret;
158
7c6a329e
MH		 159 if (!test_bit(HCI_UP, &hdev->flags))
160 return -ENETDOWN;
161
1da177e4
LT		 162 /* Serialize all requests */
163 hci_req_lock(hdev);
164 ret = __hci_request(hdev, req, opt, timeout);
165 hci_req_unlock(hdev);
166
167 return ret;
168}
169
170static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
171{
172 BT_DBG("%s %ld", hdev->name, opt);
173
174 /* Reset device */
f630cf0d 175 set_bit(HCI_RESET, &hdev->flags);
a9de9248 176 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 177}
178
e61ef499 179static void bredr_init(struct hci_dev *hdev)
1da177e4 180{
2455a3ea
AE		 181 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
182
1da177e4 183 /* Read Local Supported Features */
a9de9248 184 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 185
1143e5a6 186 /* Read Local Version */
a9de9248 187 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1da177e4
LT		 188}
189
e61ef499
AE		 190static void amp_init(struct hci_dev *hdev)
191{
2455a3ea
AE		 192 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
193
e61ef499
AE		 194 /* Read Local Version */
195 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 196
197 /* Read Local AMP Info */
198 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 199
200 /* Read Data Blk size */
201 hci_send_cmd(hdev, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
e61ef499
AE		 202}
203
204static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
205{
206 struct sk_buff *skb;
207
208 BT_DBG("%s %ld", hdev->name, opt);
209
210 /* Driver initialization */
211
212 /* Special commands */
213 while ((skb = skb_dequeue(&hdev->driver_init))) {
214 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
215 skb->dev = (void *) hdev;
216
217 skb_queue_tail(&hdev->cmd_q, skb);
218 queue_work(hdev->workqueue, &hdev->cmd_work);
219 }
220 skb_queue_purge(&hdev->driver_init);
221
11778716
AE		 222 /* Reset */
223 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
224 hci_reset_req(hdev, 0);
225
e61ef499
AE		 226 switch (hdev->dev_type) {
227 case HCI_BREDR:
228 bredr_init(hdev);
229 break;
230
231 case HCI_AMP:
232 amp_init(hdev);
233 break;
234
235 default:
236 BT_ERR("Unknown device type %d", hdev->dev_type);
237 break;
238 }
e61ef499
AE		 239}
240
1da177e4
LT		 241static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
242{
243 __u8 scan = opt;
244
245 BT_DBG("%s %x", hdev->name, scan);
246
247 /* Inquiry and Page scans */
a9de9248 248 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 249}
250
251static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
252{
253 __u8 auth = opt;
254
255 BT_DBG("%s %x", hdev->name, auth);
256
257 /* Authentication */
a9de9248 258 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 259}
260
261static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
262{
263 __u8 encrypt = opt;
264
265 BT_DBG("%s %x", hdev->name, encrypt);
266
e4e8e37c 267 /* Encryption */
a9de9248 268 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 269}
270
e4e8e37c
MH		 271static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
272{
273 __le16 policy = cpu_to_le16(opt);
274
a418b893 275 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 276
277 /* Default link policy */
278 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
279}
280
8e87d142 281/* Get HCI device by index.
1da177e4
LT		 282 * Device is held on return. */
283struct hci_dev *hci_dev_get(int index)
284{
8035ded4 285 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 286
287 BT_DBG("%d", index);
288
289 if (index < 0)
290 return NULL;
291
292 read_lock(&hci_dev_list_lock);
8035ded4 293 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 294 if (d->id == index) {
295 hdev = hci_dev_hold(d);
296 break;
297 }
298 }
299 read_unlock(&hci_dev_list_lock);
300 return hdev;
301}
1da177e4
LT		 302
303/* ---- Inquiry support ---- */
ff9ef578 304
30dc78e1
JH		 305bool hci_discovery_active(struct hci_dev *hdev)
306{
307 struct discovery_state *discov = &hdev->discovery;
308
6fbe195d 309 switch (discov->state) {
343f935b 310 case DISCOVERY_FINDING:
6fbe195d 311 case DISCOVERY_RESOLVING:
30dc78e1
JH		 312 return true;
313
6fbe195d
AG		 314 default:
315 return false;
316 }
30dc78e1
JH		 317}
318
ff9ef578
JH		 319void hci_discovery_set_state(struct hci_dev *hdev, int state)
320{
321 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
322
323 if (hdev->discovery.state == state)
324 return;
325
326 switch (state) {
327 case DISCOVERY_STOPPED:
7b99b659
AG		 328 if (hdev->discovery.state != DISCOVERY_STARTING)
329 mgmt_discovering(hdev, 0);
ff9ef578
JH		 330 break;
331 case DISCOVERY_STARTING:
332 break;
343f935b 333 case DISCOVERY_FINDING:
ff9ef578
JH		 334 mgmt_discovering(hdev, 1);
335 break;
30dc78e1
JH		 336 case DISCOVERY_RESOLVING:
337 break;
ff9ef578
JH		 338 case DISCOVERY_STOPPING:
339 break;
340 }
341
342 hdev->discovery.state = state;
343}
344
1da177e4
LT		 345static void inquiry_cache_flush(struct hci_dev *hdev)
346{
30883512 347 struct discovery_state *cache = &hdev->discovery;
b57c1a56 348 struct inquiry_entry *p, *n;
1da177e4 349
561aafbc
JH		 350 list_for_each_entry_safe(p, n, &cache->all, all) {
351 list_del(&p->all);
b57c1a56 352 kfree(p);
1da177e4 353 }
561aafbc
JH		 354
355 INIT_LIST_HEAD(&cache->unknown);
356 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 357}
358
a8c5fb1a
GP		 359struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
360 bdaddr_t *bdaddr)
1da177e4 361{
30883512 362 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 363 struct inquiry_entry *e;
364
6ed93dc6 365 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 366
561aafbc
JH		 367 list_for_each_entry(e, &cache->all, all) {
368 if (!bacmp(&e->data.bdaddr, bdaddr))
369 return e;
370 }
371
372 return NULL;
373}
374
375struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 376 bdaddr_t *bdaddr)
561aafbc 377{
30883512 378 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 379 struct inquiry_entry *e;
380
6ed93dc6 381 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 382
383 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 384 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 385 return e;
386 }
387
388 return NULL;
1da177e4
LT		 389}
390
30dc78e1 391struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 392 bdaddr_t *bdaddr,
393 int state)
30dc78e1
JH		 394{
395 struct discovery_state *cache = &hdev->discovery;
396 struct inquiry_entry *e;
397
6ed93dc6 398 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 399
400 list_for_each_entry(e, &cache->resolve, list) {
401 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
402 return e;
403 if (!bacmp(&e->data.bdaddr, bdaddr))
404 return e;
405 }
406
407 return NULL;
408}
409
a3d4e20a 410void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 411 struct inquiry_entry *ie)
a3d4e20a
JH		 412{
413 struct discovery_state *cache = &hdev->discovery;
414 struct list_head *pos = &cache->resolve;
415 struct inquiry_entry *p;
416
417 list_del(&ie->list);
418
419 list_for_each_entry(p, &cache->resolve, list) {
420 if (p->name_state != NAME_PENDING &&
a8c5fb1a 421 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 422 break;
423 pos = &p->list;
424 }
425
426 list_add(&ie->list, pos);
427}
428
3175405b 429bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 430 bool name_known, bool *ssp)
1da177e4 431{
30883512 432 struct discovery_state *cache = &hdev->discovery;
70f23020 433 struct inquiry_entry *ie;
1da177e4 434
6ed93dc6 435 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 436
2b2fec4d
SJ		 437 hci_remove_remote_oob_data(hdev, &data->bdaddr);
438
388fc8fa
JH		 439 if (ssp)
440 *ssp = data->ssp_mode;
441
70f23020 442 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 443 if (ie) {
388fc8fa
JH		 444 if (ie->data.ssp_mode && ssp)
445 *ssp = true;
446
a3d4e20a 447 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 448 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 449 ie->data.rssi = data->rssi;
450 hci_inquiry_cache_update_resolve(hdev, ie);
451 }
452
561aafbc 453 goto update;
a3d4e20a 454 }
561aafbc
JH		 455
456 /* Entry not in the cache. Add new one. */
457 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
458 if (!ie)
3175405b 459 return false;
561aafbc
JH		 460
461 list_add(&ie->all, &cache->all);
462
463 if (name_known) {
464 ie->name_state = NAME_KNOWN;
465 } else {
466 ie->name_state = NAME_NOT_KNOWN;
467 list_add(&ie->list, &cache->unknown);
468 }
70f23020 469
561aafbc
JH		 470update:
471 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 472 ie->name_state != NAME_PENDING) {
561aafbc
JH		 473 ie->name_state = NAME_KNOWN;
474 list_del(&ie->list);
1da177e4
LT		 475 }
476
70f23020
AE		 477 memcpy(&ie->data, data, sizeof(*data));
478 ie->timestamp = jiffies;
1da177e4 479 cache->timestamp = jiffies;
3175405b
JH		 480
481 if (ie->name_state == NAME_NOT_KNOWN)
482 return false;
483
484 return true;
1da177e4
LT		 485}
486
487static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
488{
30883512 489 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 490 struct inquiry_info *info = (struct inquiry_info *) buf;
491 struct inquiry_entry *e;
492 int copied = 0;
493
561aafbc 494 list_for_each_entry(e, &cache->all, all) {
1da177e4 495 struct inquiry_data *data = &e->data;
b57c1a56
JH		 496
497 if (copied >= num)
498 break;
499
1da177e4
LT		 500 bacpy(&info->bdaddr, &data->bdaddr);
501 info->pscan_rep_mode = data->pscan_rep_mode;
502 info->pscan_period_mode = data->pscan_period_mode;
503 info->pscan_mode = data->pscan_mode;
504 memcpy(info->dev_class, data->dev_class, 3);
505 info->clock_offset = data->clock_offset;
b57c1a56 506
1da177e4 507 info++;
b57c1a56 508 copied++;
1da177e4
LT		 509 }
510
511 BT_DBG("cache %p, copied %d", cache, copied);
512 return copied;
513}
514
515static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
516{
517 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
518 struct hci_cp_inquiry cp;
519
520 BT_DBG("%s", hdev->name);
521
522 if (test_bit(HCI_INQUIRY, &hdev->flags))
523 return;
524
525 /* Start Inquiry */
526 memcpy(&cp.lap, &ir->lap, 3);
527 cp.length = ir->length;
528 cp.num_rsp = ir->num_rsp;
a9de9248 529 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 530}
531
532int hci_inquiry(void __user *arg)
533{
534 __u8 __user *ptr = arg;
535 struct hci_inquiry_req ir;
536 struct hci_dev *hdev;
537 int err = 0, do_inquiry = 0, max_rsp;
538 long timeo;
539 __u8 *buf;
540
541 if (copy_from_user(&ir, ptr, sizeof(ir)))
542 return -EFAULT;
543
5a08ecce
AE		 544 hdev = hci_dev_get(ir.dev_id);
545 if (!hdev)
1da177e4
LT		 546 return -ENODEV;
547
09fd0de5 548 hci_dev_lock(hdev);
8e87d142 549 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 550 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 551 inquiry_cache_flush(hdev);
552 do_inquiry = 1;
553 }
09fd0de5 554 hci_dev_unlock(hdev);
1da177e4 555
04837f64 556 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 557
558 if (do_inquiry) {
559 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
560 if (err < 0)
561 goto done;
562 }
1da177e4 563
8fc9ced3
GP		 564 /* for unlimited number of responses we will use buffer with
565 * 255 entries
566 */
1da177e4
LT		 567 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
568
569 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
570 * copy it to the user space.
571 */
01df8c31 572 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 573 if (!buf) {
1da177e4
LT		 574 err = -ENOMEM;
575 goto done;
576 }
577
09fd0de5 578 hci_dev_lock(hdev);
1da177e4 579 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 580 hci_dev_unlock(hdev);
1da177e4
LT		 581
582 BT_DBG("num_rsp %d", ir.num_rsp);
583
584 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
585 ptr += sizeof(ir);
586 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 587 ir.num_rsp))
1da177e4 588 err = -EFAULT;
8e87d142 589 } else
1da177e4
LT		 590 err = -EFAULT;
591
592 kfree(buf);
593
594done:
595 hci_dev_put(hdev);
596 return err;
597}
598
3f0f524b
JH		 599static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
600{
601 u8 ad_len = 0, flags = 0;
602 size_t name_len;
603
604 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
605 flags |= LE_AD_GENERAL;
606
607 if (!lmp_bredr_capable(hdev))
608 flags |= LE_AD_NO_BREDR;
609
610 if (lmp_le_br_capable(hdev))
611 flags |= LE_AD_SIM_LE_BREDR_CTRL;
612
613 if (lmp_host_le_br_capable(hdev))
614 flags |= LE_AD_SIM_LE_BREDR_HOST;
615
616 if (flags) {
617 BT_DBG("adv flags 0x%02x", flags);
618
619 ptr[0] = 2;
620 ptr[1] = EIR_FLAGS;
621 ptr[2] = flags;
622
623 ad_len += 3;
624 ptr += 3;
625 }
626
627 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
628 ptr[0] = 2;
629 ptr[1] = EIR_TX_POWER;
630 ptr[2] = (u8) hdev->adv_tx_power;
631
632 ad_len += 3;
633 ptr += 3;
634 }
635
636 name_len = strlen(hdev->dev_name);
637 if (name_len > 0) {
638 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
639
640 if (name_len > max_len) {
641 name_len = max_len;
642 ptr[1] = EIR_NAME_SHORT;
643 } else
644 ptr[1] = EIR_NAME_COMPLETE;
645
646 ptr[0] = name_len + 1;
647
648 memcpy(ptr + 2, hdev->dev_name, name_len);
649
650 ad_len += (name_len + 2);
651 ptr += (name_len + 2);
652 }
653
654 return ad_len;
655}
656
657int hci_update_ad(struct hci_dev *hdev)
658{
659 struct hci_cp_le_set_adv_data cp;
660 u8 len;
661 int err;
662
663 hci_dev_lock(hdev);
664
665 if (!lmp_le_capable(hdev)) {
666 err = -EINVAL;
667 goto unlock;
668 }
669
670 memset(&cp, 0, sizeof(cp));
671
672 len = create_ad(hdev, cp.data);
673
674 if (hdev->adv_data_len == len &&
675 memcmp(cp.data, hdev->adv_data, len) == 0) {
676 err = 0;
677 goto unlock;
678 }
679
680 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
681 hdev->adv_data_len = len;
682
683 cp.length = len;
684 err = hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
685
686unlock:
687 hci_dev_unlock(hdev);
688
689 return err;
690}
691
1da177e4
LT		 692/* ---- HCI ioctl helpers ---- */
693
694int hci_dev_open(__u16 dev)
695{
696 struct hci_dev *hdev;
697 int ret = 0;
698
5a08ecce
AE		 699 hdev = hci_dev_get(dev);
700 if (!hdev)
1da177e4
LT		 701 return -ENODEV;
702
703 BT_DBG("%s %p", hdev->name, hdev);
704
705 hci_req_lock(hdev);
706
94324962
JH		 707 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
708 ret = -ENODEV;
709 goto done;
710 }
711
611b30f7
MH		 712 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
713 ret = -ERFKILL;
714 goto done;
715 }
716
1da177e4
LT		 717 if (test_bit(HCI_UP, &hdev->flags)) {
718 ret = -EALREADY;
719 goto done;
720 }
721
722 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
723 set_bit(HCI_RAW, &hdev->flags);
724
07e3b94a
AE		 725 /* Treat all non BR/EDR controllers as raw devices if
726 enable_hs is not set */
727 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 728 set_bit(HCI_RAW, &hdev->flags);
729
1da177e4
LT		 730 if (hdev->open(hdev)) {
731 ret = -EIO;
732 goto done;
733 }
734
735 if (!test_bit(HCI_RAW, &hdev->flags)) {
736 atomic_set(&hdev->cmd_cnt, 1);
737 set_bit(HCI_INIT, &hdev->flags);
a5040efa 738 hdev->init_last_cmd = 0;
1da177e4 739
5f246e89 740 ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 741
742 clear_bit(HCI_INIT, &hdev->flags);
743 }
744
745 if (!ret) {
746 hci_dev_hold(hdev);
747 set_bit(HCI_UP, &hdev->flags);
748 hci_notify(hdev, HCI_DEV_UP);
3f0f524b 749 hci_update_ad(hdev);
bb4b2a9a
AE		 750 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
751 mgmt_valid_hdev(hdev)) {
09fd0de5 752 hci_dev_lock(hdev);
744cf19e 753 mgmt_powered(hdev, 1);
09fd0de5 754 hci_dev_unlock(hdev);
56e5cb86 755 }
8e87d142 756 } else {
1da177e4 757 /* Init failed, cleanup */
3eff45ea 758 flush_work(&hdev->tx_work);
c347b765 759 flush_work(&hdev->cmd_work);
b78752cc 760 flush_work(&hdev->rx_work);
1da177e4
LT		 761
762 skb_queue_purge(&hdev->cmd_q);
763 skb_queue_purge(&hdev->rx_q);
764
765 if (hdev->flush)
766 hdev->flush(hdev);
767
768 if (hdev->sent_cmd) {
769 kfree_skb(hdev->sent_cmd);
770 hdev->sent_cmd = NULL;
771 }
772
773 hdev->close(hdev);
774 hdev->flags = 0;
775 }
776
777done:
778 hci_req_unlock(hdev);
779 hci_dev_put(hdev);
780 return ret;
781}
782
783static int hci_dev_do_close(struct hci_dev *hdev)
784{
785 BT_DBG("%s %p", hdev->name, hdev);
786
28b75a89
AG		 787 cancel_work_sync(&hdev->le_scan);
788
78c04c0b
VCG		 789 cancel_delayed_work(&hdev->power_off);
790
1da177e4
LT		 791 hci_req_cancel(hdev, ENODEV);
792 hci_req_lock(hdev);
793
794 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 795 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 796 hci_req_unlock(hdev);
797 return 0;
798 }
799
3eff45ea
GP		 800 /* Flush RX and TX works */
801 flush_work(&hdev->tx_work);
b78752cc 802 flush_work(&hdev->rx_work);
1da177e4 803
16ab91ab 804 if (hdev->discov_timeout > 0) {
e0f9309f 805 cancel_delayed_work(&hdev->discov_off);
16ab91ab 806 hdev->discov_timeout = 0;
5e5282bb 807 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 808 }
809
a8b2d5c2 810 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 811 cancel_delayed_work(&hdev->service_cache);
812
7ba8b4be
AG		 813 cancel_delayed_work_sync(&hdev->le_scan_disable);
814
09fd0de5 815 hci_dev_lock(hdev);
1da177e4
LT		 816 inquiry_cache_flush(hdev);
817 hci_conn_hash_flush(hdev);
09fd0de5 818 hci_dev_unlock(hdev);
1da177e4
LT		 819
820 hci_notify(hdev, HCI_DEV_DOWN);
821
822 if (hdev->flush)
823 hdev->flush(hdev);
824
825 /* Reset device */
826 skb_queue_purge(&hdev->cmd_q);
827 atomic_set(&hdev->cmd_cnt, 1);
8af59467 828 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 829 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 830 set_bit(HCI_INIT, &hdev->flags);
5f246e89 831 __hci_request(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 832 clear_bit(HCI_INIT, &hdev->flags);
833 }
834
c347b765
GP		 835 /* flush cmd work */
836 flush_work(&hdev->cmd_work);
1da177e4
LT		 837
838 /* Drop queues */
839 skb_queue_purge(&hdev->rx_q);
840 skb_queue_purge(&hdev->cmd_q);
841 skb_queue_purge(&hdev->raw_q);
842
843 /* Drop last sent command */
844 if (hdev->sent_cmd) {
b79f44c1 845 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 846 kfree_skb(hdev->sent_cmd);
847 hdev->sent_cmd = NULL;
848 }
849
850 /* After this point our queues are empty
851 * and no tasks are scheduled. */
852 hdev->close(hdev);
853
bb4b2a9a
AE		 854 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
855 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 856 hci_dev_lock(hdev);
857 mgmt_powered(hdev, 0);
858 hci_dev_unlock(hdev);
859 }
5add6af8 860
1da177e4
LT		 861 /* Clear flags */
862 hdev->flags = 0;
863
ced5c338
AE		 864 /* Controller radio is available but is currently powered down */
865 hdev->amp_status = 0;
866
e59fda8d 867 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 868 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 869
1da177e4
LT		 870 hci_req_unlock(hdev);
871
872 hci_dev_put(hdev);
873 return 0;
874}
875
876int hci_dev_close(__u16 dev)
877{
878 struct hci_dev *hdev;
879 int err;
880
70f23020
AE		 881 hdev = hci_dev_get(dev);
882 if (!hdev)
1da177e4 883 return -ENODEV;
8ee56540
MH		 884
885 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
886 cancel_delayed_work(&hdev->power_off);
887
1da177e4 888 err = hci_dev_do_close(hdev);
8ee56540 889
1da177e4
LT		 890 hci_dev_put(hdev);
891 return err;
892}
893
894int hci_dev_reset(__u16 dev)
895{
896 struct hci_dev *hdev;
897 int ret = 0;
898
70f23020
AE		 899 hdev = hci_dev_get(dev);
900 if (!hdev)
1da177e4
LT		 901 return -ENODEV;
902
903 hci_req_lock(hdev);
1da177e4
LT		 904
905 if (!test_bit(HCI_UP, &hdev->flags))
906 goto done;
907
908 /* Drop queues */
909 skb_queue_purge(&hdev->rx_q);
910 skb_queue_purge(&hdev->cmd_q);
911
09fd0de5 912 hci_dev_lock(hdev);
1da177e4
LT		 913 inquiry_cache_flush(hdev);
914 hci_conn_hash_flush(hdev);
09fd0de5 915 hci_dev_unlock(hdev);
1da177e4
LT		 916
917 if (hdev->flush)
918 hdev->flush(hdev);
919
8e87d142 920 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 921 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 922
923 if (!test_bit(HCI_RAW, &hdev->flags))
5f246e89 924 ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 925
926done:
1da177e4
LT		 927 hci_req_unlock(hdev);
928 hci_dev_put(hdev);
929 return ret;
930}
931
932int hci_dev_reset_stat(__u16 dev)
933{
934 struct hci_dev *hdev;
935 int ret = 0;
936
70f23020
AE		 937 hdev = hci_dev_get(dev);
938 if (!hdev)
1da177e4
LT		 939 return -ENODEV;
940
941 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
942
943 hci_dev_put(hdev);
944
945 return ret;
946}
947
948int hci_dev_cmd(unsigned int cmd, void __user *arg)
949{
950 struct hci_dev *hdev;
951 struct hci_dev_req dr;
952 int err = 0;
953
954 if (copy_from_user(&dr, arg, sizeof(dr)))
955 return -EFAULT;
956
70f23020
AE		 957 hdev = hci_dev_get(dr.dev_id);
958 if (!hdev)
1da177e4
LT		 959 return -ENODEV;
960
961 switch (cmd) {
962 case HCISETAUTH:
04837f64 963 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
5f246e89 964 HCI_INIT_TIMEOUT);
1da177e4
LT		 965 break;
966
967 case HCISETENCRYPT:
968 if (!lmp_encrypt_capable(hdev)) {
969 err = -EOPNOTSUPP;
970 break;
971 }
972
973 if (!test_bit(HCI_AUTH, &hdev->flags)) {
974 /* Auth must be enabled first */
04837f64 975 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
5f246e89 976 HCI_INIT_TIMEOUT);
1da177e4
LT		 977 if (err)
978 break;
979 }
980
04837f64 981 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
5f246e89 982 HCI_INIT_TIMEOUT);
1da177e4
LT		 983 break;
984
985 case HCISETSCAN:
04837f64 986 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
5f246e89 987 HCI_INIT_TIMEOUT);
1da177e4
LT		 988 break;
989
1da177e4 990 case HCISETLINKPOL:
e4e8e37c 991 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
5f246e89 992 HCI_INIT_TIMEOUT);
1da177e4
LT		 993 break;
994
995 case HCISETLINKMODE:
e4e8e37c
MH		 996 hdev->link_mode = ((__u16) dr.dev_opt) &
997 (HCI_LM_MASTER | HCI_LM_ACCEPT);
998 break;
999
1000 case HCISETPTYPE:
1001 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1002 break;
1003
1004 case HCISETACLMTU:
e4e8e37c
MH		 1005 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1006 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1007 break;
1008
1009 case HCISETSCOMTU:
e4e8e37c
MH		 1010 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1011 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1012 break;
1013
1014 default:
1015 err = -EINVAL;
1016 break;
1017 }
e4e8e37c 1018
1da177e4
LT		 1019 hci_dev_put(hdev);
1020 return err;
1021}
1022
1023int hci_get_dev_list(void __user *arg)
1024{
8035ded4 1025 struct hci_dev *hdev;
1da177e4
LT		 1026 struct hci_dev_list_req *dl;
1027 struct hci_dev_req *dr;
1da177e4
LT		 1028 int n = 0, size, err;
1029 __u16 dev_num;
1030
1031 if (get_user(dev_num, (__u16 __user *) arg))
1032 return -EFAULT;
1033
1034 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1035 return -EINVAL;
1036
1037 size = sizeof(*dl) + dev_num * sizeof(*dr);
1038
70f23020
AE		 1039 dl = kzalloc(size, GFP_KERNEL);
1040 if (!dl)
1da177e4
LT		 1041 return -ENOMEM;
1042
1043 dr = dl->dev_req;
1044
f20d09d5 1045 read_lock(&hci_dev_list_lock);
8035ded4 1046 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1047 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1048 cancel_delayed_work(&hdev->power_off);
c542a06c 1049
a8b2d5c2
JH		 1050 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1051 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1052
1da177e4
LT		 1053 (dr + n)->dev_id = hdev->id;
1054 (dr + n)->dev_opt = hdev->flags;
c542a06c 1055
1da177e4
LT		 1056 if (++n >= dev_num)
1057 break;
1058 }
f20d09d5 1059 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1060
1061 dl->dev_num = n;
1062 size = sizeof(*dl) + n * sizeof(*dr);
1063
1064 err = copy_to_user(arg, dl, size);
1065 kfree(dl);
1066
1067 return err ? -EFAULT : 0;
1068}
1069
1070int hci_get_dev_info(void __user *arg)
1071{
1072 struct hci_dev *hdev;
1073 struct hci_dev_info di;
1074 int err = 0;
1075
1076 if (copy_from_user(&di, arg, sizeof(di)))
1077 return -EFAULT;
1078
70f23020
AE		 1079 hdev = hci_dev_get(di.dev_id);
1080 if (!hdev)
1da177e4
LT		 1081 return -ENODEV;
1082
a8b2d5c2 1083 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1084 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1085
a8b2d5c2
JH		 1086 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1087 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1088
1da177e4
LT		 1089 strcpy(di.name, hdev->name);
1090 di.bdaddr = hdev->bdaddr;
943da25d 1091 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1092 di.flags = hdev->flags;
1093 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1094 if (lmp_bredr_capable(hdev)) {
1095 di.acl_mtu = hdev->acl_mtu;
1096 di.acl_pkts = hdev->acl_pkts;
1097 di.sco_mtu = hdev->sco_mtu;
1098 di.sco_pkts = hdev->sco_pkts;
1099 } else {
1100 di.acl_mtu = hdev->le_mtu;
1101 di.acl_pkts = hdev->le_pkts;
1102 di.sco_mtu = 0;
1103 di.sco_pkts = 0;
1104 }
1da177e4
LT		 1105 di.link_policy = hdev->link_policy;
1106 di.link_mode = hdev->link_mode;
1107
1108 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1109 memcpy(&di.features, &hdev->features, sizeof(di.features));
1110
1111 if (copy_to_user(arg, &di, sizeof(di)))
1112 err = -EFAULT;
1113
1114 hci_dev_put(hdev);
1115
1116 return err;
1117}
1118
1119/* ---- Interface to HCI drivers ---- */
1120
611b30f7
MH		 1121static int hci_rfkill_set_block(void *data, bool blocked)
1122{
1123 struct hci_dev *hdev = data;
1124
1125 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1126
1127 if (!blocked)
1128 return 0;
1129
1130 hci_dev_do_close(hdev);
1131
1132 return 0;
1133}
1134
1135static const struct rfkill_ops hci_rfkill_ops = {
1136 .set_block = hci_rfkill_set_block,
1137};
1138
ab81cbf9
JH		 1139static void hci_power_on(struct work_struct *work)
1140{
1141 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1142
1143 BT_DBG("%s", hdev->name);
1144
1145 if (hci_dev_open(hdev->id) < 0)
1146 return;
1147
a8b2d5c2 1148 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1149 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1150 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1151
a8b2d5c2 1152 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1153 mgmt_index_added(hdev);
ab81cbf9
JH		 1154}
1155
1156static void hci_power_off(struct work_struct *work)
1157{
3243553f 1158 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1159 power_off.work);
ab81cbf9
JH		 1160
1161 BT_DBG("%s", hdev->name);
1162
8ee56540 1163 hci_dev_do_close(hdev);
ab81cbf9
JH		 1164}
1165
16ab91ab
JH		 1166static void hci_discov_off(struct work_struct *work)
1167{
1168 struct hci_dev *hdev;
1169 u8 scan = SCAN_PAGE;
1170
1171 hdev = container_of(work, struct hci_dev, discov_off.work);
1172
1173 BT_DBG("%s", hdev->name);
1174
09fd0de5 1175 hci_dev_lock(hdev);
16ab91ab
JH		 1176
1177 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1178
1179 hdev->discov_timeout = 0;
1180
09fd0de5 1181 hci_dev_unlock(hdev);
16ab91ab
JH		 1182}
1183
2aeb9a1a
JH		 1184int hci_uuids_clear(struct hci_dev *hdev)
1185{
4821002c 1186 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1187
4821002c
JH		 1188 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1189 list_del(&uuid->list);
2aeb9a1a
JH		 1190 kfree(uuid);
1191 }
1192
1193 return 0;
1194}
1195
55ed8ca1
JH		 1196int hci_link_keys_clear(struct hci_dev *hdev)
1197{
1198 struct list_head *p, *n;
1199
1200 list_for_each_safe(p, n, &hdev->link_keys) {
1201 struct link_key *key;
1202
1203 key = list_entry(p, struct link_key, list);
1204
1205 list_del(p);
1206 kfree(key);
1207 }
1208
1209 return 0;
1210}
1211
b899efaf
VCG		 1212int hci_smp_ltks_clear(struct hci_dev *hdev)
1213{
1214 struct smp_ltk *k, *tmp;
1215
1216 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1217 list_del(&k->list);
1218 kfree(k);
1219 }
1220
1221 return 0;
1222}
1223
55ed8ca1
JH		 1224struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1225{
8035ded4 1226 struct link_key *k;
55ed8ca1 1227
8035ded4 1228 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1229 if (bacmp(bdaddr, &k->bdaddr) == 0)
1230 return k;
55ed8ca1
JH		 1231
1232 return NULL;
1233}
1234
745c0ce3 1235static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1236 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1237{
1238 /* Legacy key */
1239 if (key_type < 0x03)
745c0ce3 1240 return true;
d25e28ab
JH		 1241
1242 /* Debug keys are insecure so don't store them persistently */
1243 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1244 return false;
d25e28ab
JH		 1245
1246 /* Changed combination key and there's no previous one */
1247 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1248 return false;
d25e28ab
JH		 1249
1250 /* Security mode 3 case */
1251 if (!conn)
745c0ce3 1252 return true;
d25e28ab
JH		 1253
1254 /* Neither local nor remote side had no-bonding as requirement */
1255 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1256 return true;
d25e28ab
JH		 1257
1258 /* Local side had dedicated bonding as requirement */
1259 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1260 return true;
d25e28ab
JH		 1261
1262 /* Remote side had dedicated bonding as requirement */
1263 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1264 return true;
d25e28ab
JH		 1265
1266 /* If none of the above criteria match, then don't store the key
1267 * persistently */
745c0ce3 1268 return false;
d25e28ab
JH		 1269}
1270
c9839a11 1271struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1272{
c9839a11 1273 struct smp_ltk *k;
75d262c2 1274
c9839a11
VCG		 1275 list_for_each_entry(k, &hdev->long_term_keys, list) {
1276 if (k->ediv != ediv ||
a8c5fb1a 1277 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1278 continue;
1279
c9839a11 1280 return k;
75d262c2
VCG		 1281 }
1282
1283 return NULL;
1284}
75d262c2 1285
c9839a11 1286struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1287 u8 addr_type)
75d262c2 1288{
c9839a11 1289 struct smp_ltk *k;
75d262c2 1290
c9839a11
VCG		 1291 list_for_each_entry(k, &hdev->long_term_keys, list)
1292 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1293 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1294 return k;
1295
1296 return NULL;
1297}
75d262c2 1298
d25e28ab 1299int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1300 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1301{
1302 struct link_key *key, *old_key;
745c0ce3
VA		 1303 u8 old_key_type;
1304 bool persistent;
55ed8ca1
JH		 1305
1306 old_key = hci_find_link_key(hdev, bdaddr);
1307 if (old_key) {
1308 old_key_type = old_key->type;
1309 key = old_key;
1310 } else {
12adcf3a 1311 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1312 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1313 if (!key)
1314 return -ENOMEM;
1315 list_add(&key->list, &hdev->link_keys);
1316 }
1317
6ed93dc6 1318 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1319
d25e28ab
JH		 1320 /* Some buggy controller combinations generate a changed
1321 * combination key for legacy pairing even when there's no
1322 * previous key */
1323 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1324 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1325 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1326 if (conn)
1327 conn->key_type = type;
1328 }
d25e28ab 1329
55ed8ca1 1330 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1331 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1332 key->pin_len = pin_len;
1333
b6020ba0 1334 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1335 key->type = old_key_type;
4748fed2
JH		 1336 else
1337 key->type = type;
1338
4df378a1
JH		 1339 if (!new_key)
1340 return 0;
1341
1342 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1343
744cf19e 1344 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1345
6ec5bcad
VA		 1346 if (conn)
1347 conn->flush_key = !persistent;
55ed8ca1
JH		 1348
1349 return 0;
1350}
1351
c9839a11 1352int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1353 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1354 ediv, u8 rand[8])
75d262c2 1355{
c9839a11 1356 struct smp_ltk *key, *old_key;
75d262c2 1357
c9839a11
VCG		 1358 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1359 return 0;
75d262c2 1360
c9839a11
VCG		 1361 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1362 if (old_key)
75d262c2 1363 key = old_key;
c9839a11
VCG		 1364 else {
1365 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1366 if (!key)
1367 return -ENOMEM;
c9839a11 1368 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1369 }
1370
75d262c2 1371 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1372 key->bdaddr_type = addr_type;
1373 memcpy(key->val, tk, sizeof(key->val));
1374 key->authenticated = authenticated;
1375 key->ediv = ediv;
1376 key->enc_size = enc_size;
1377 key->type = type;
1378 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1379
c9839a11
VCG		 1380 if (!new_key)
1381 return 0;
75d262c2 1382
261cc5aa
VCG		 1383 if (type & HCI_SMP_LTK)
1384 mgmt_new_ltk(hdev, key, 1);
1385
75d262c2
VCG		 1386 return 0;
1387}
1388
55ed8ca1
JH		 1389int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1390{
1391 struct link_key *key;
1392
1393 key = hci_find_link_key(hdev, bdaddr);
1394 if (!key)
1395 return -ENOENT;
1396
6ed93dc6 1397 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1398
1399 list_del(&key->list);
1400 kfree(key);
1401
1402 return 0;
1403}
1404
b899efaf
VCG		 1405int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1406{
1407 struct smp_ltk *k, *tmp;
1408
1409 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1410 if (bacmp(bdaddr, &k->bdaddr))
1411 continue;
1412
6ed93dc6 1413 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1414
1415 list_del(&k->list);
1416 kfree(k);
1417 }
1418
1419 return 0;
1420}
1421
6bd32326 1422/* HCI command timer function */
bda4f23a 1423static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1424{
1425 struct hci_dev *hdev = (void *) arg;
1426
bda4f23a
AE		 1427 if (hdev->sent_cmd) {
1428 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1429 u16 opcode = __le16_to_cpu(sent->opcode);
1430
1431 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1432 } else {
1433 BT_ERR("%s command tx timeout", hdev->name);
1434 }
1435
6bd32326 1436 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1437 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1438}
1439
2763eda6 1440struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1441 bdaddr_t *bdaddr)
2763eda6
SJ		 1442{
1443 struct oob_data *data;
1444
1445 list_for_each_entry(data, &hdev->remote_oob_data, list)
1446 if (bacmp(bdaddr, &data->bdaddr) == 0)
1447 return data;
1448
1449 return NULL;
1450}
1451
1452int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1453{
1454 struct oob_data *data;
1455
1456 data = hci_find_remote_oob_data(hdev, bdaddr);
1457 if (!data)
1458 return -ENOENT;
1459
6ed93dc6 1460 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1461
1462 list_del(&data->list);
1463 kfree(data);
1464
1465 return 0;
1466}
1467
1468int hci_remote_oob_data_clear(struct hci_dev *hdev)
1469{
1470 struct oob_data *data, *n;
1471
1472 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1473 list_del(&data->list);
1474 kfree(data);
1475 }
1476
1477 return 0;
1478}
1479
1480int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1481 u8 *randomizer)
2763eda6
SJ		 1482{
1483 struct oob_data *data;
1484
1485 data = hci_find_remote_oob_data(hdev, bdaddr);
1486
1487 if (!data) {
1488 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1489 if (!data)
1490 return -ENOMEM;
1491
1492 bacpy(&data->bdaddr, bdaddr);
1493 list_add(&data->list, &hdev->remote_oob_data);
1494 }
1495
1496 memcpy(data->hash, hash, sizeof(data->hash));
1497 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1498
6ed93dc6 1499 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1500
1501 return 0;
1502}
1503
04124681 1504struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1505{
8035ded4 1506 struct bdaddr_list *b;
b2a66aad 1507
8035ded4 1508 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1509 if (bacmp(bdaddr, &b->bdaddr) == 0)
1510 return b;
b2a66aad
AJ		 1511
1512 return NULL;
1513}
1514
1515int hci_blacklist_clear(struct hci_dev *hdev)
1516{
1517 struct list_head *p, *n;
1518
1519 list_for_each_safe(p, n, &hdev->blacklist) {
1520 struct bdaddr_list *b;
1521
1522 b = list_entry(p, struct bdaddr_list, list);
1523
1524 list_del(p);
1525 kfree(b);
1526 }
1527
1528 return 0;
1529}
1530
88c1fe4b 1531int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1532{
1533 struct bdaddr_list *entry;
b2a66aad
AJ		 1534
1535 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1536 return -EBADF;
1537
5e762444
AJ		 1538 if (hci_blacklist_lookup(hdev, bdaddr))
1539 return -EEXIST;
b2a66aad
AJ		 1540
1541 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1542 if (!entry)
1543 return -ENOMEM;
b2a66aad
AJ		 1544
1545 bacpy(&entry->bdaddr, bdaddr);
1546
1547 list_add(&entry->list, &hdev->blacklist);
1548
88c1fe4b 1549 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1550}
1551
88c1fe4b 1552int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1553{
1554 struct bdaddr_list *entry;
b2a66aad 1555
1ec918ce 1556 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1557 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1558
1559 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1560 if (!entry)
5e762444 1561 return -ENOENT;
b2a66aad
AJ		 1562
1563 list_del(&entry->list);
1564 kfree(entry);
1565
88c1fe4b 1566 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1567}
1568
7ba8b4be
AG		 1569static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1570{
1571 struct le_scan_params *param = (struct le_scan_params *) opt;
1572 struct hci_cp_le_set_scan_param cp;
1573
1574 memset(&cp, 0, sizeof(cp));
1575 cp.type = param->type;
1576 cp.interval = cpu_to_le16(param->interval);
1577 cp.window = cpu_to_le16(param->window);
1578
1579 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1580}
1581
1582static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1583{
1584 struct hci_cp_le_set_scan_enable cp;
1585
1586 memset(&cp, 0, sizeof(cp));
1587 cp.enable = 1;
0431a43c 1588 cp.filter_dup = 1;
7ba8b4be
AG		 1589
1590 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1591}
1592
1593static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1594 u16 window, int timeout)
7ba8b4be
AG		 1595{
1596 long timeo = msecs_to_jiffies(3000);
1597 struct le_scan_params param;
1598 int err;
1599
1600 BT_DBG("%s", hdev->name);
1601
1602 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1603 return -EINPROGRESS;
1604
1605 param.type = type;
1606 param.interval = interval;
1607 param.window = window;
1608
1609 hci_req_lock(hdev);
1610
1611 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1612 timeo);
7ba8b4be
AG		 1613 if (!err)
1614 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1615
1616 hci_req_unlock(hdev);
1617
1618 if (err < 0)
1619 return err;
1620
46818ed5
JH		 1621 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
1622 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1623
1624 return 0;
1625}
1626
7dbfac1d
AG		 1627int hci_cancel_le_scan(struct hci_dev *hdev)
1628{
1629 BT_DBG("%s", hdev->name);
1630
1631 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1632 return -EALREADY;
1633
1634 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1635 struct hci_cp_le_set_scan_enable cp;
1636
1637 /* Send HCI command to disable LE Scan */
1638 memset(&cp, 0, sizeof(cp));
1639 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1640 }
1641
1642 return 0;
1643}
1644
7ba8b4be
AG		 1645static void le_scan_disable_work(struct work_struct *work)
1646{
1647 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1648 le_scan_disable.work);
7ba8b4be
AG		 1649 struct hci_cp_le_set_scan_enable cp;
1650
1651 BT_DBG("%s", hdev->name);
1652
1653 memset(&cp, 0, sizeof(cp));
1654
1655 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1656}
1657
28b75a89
AG		 1658static void le_scan_work(struct work_struct *work)
1659{
1660 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1661 struct le_scan_params *param = &hdev->le_scan_params;
1662
1663 BT_DBG("%s", hdev->name);
1664
04124681
GP		 1665 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1666 param->timeout);
28b75a89
AG		 1667}
1668
1669int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1670 int timeout)
28b75a89
AG		 1671{
1672 struct le_scan_params *param = &hdev->le_scan_params;
1673
1674 BT_DBG("%s", hdev->name);
1675
f1550478
JH		 1676 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1677 return -ENOTSUPP;
1678
28b75a89
AG		 1679 if (work_busy(&hdev->le_scan))
1680 return -EINPROGRESS;
1681
1682 param->type = type;
1683 param->interval = interval;
1684 param->window = window;
1685 param->timeout = timeout;
1686
1687 queue_work(system_long_wq, &hdev->le_scan);
1688
1689 return 0;
1690}
1691
9be0dab7
DH		 1692/* Alloc HCI device */
1693struct hci_dev *hci_alloc_dev(void)
1694{
1695 struct hci_dev *hdev;
1696
1697 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1698 if (!hdev)
1699 return NULL;
1700
b1b813d4
DH		 1701 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1702 hdev->esco_type = (ESCO_HV1);
1703 hdev->link_mode = (HCI_LM_ACCEPT);
1704 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 1705 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
1706 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 1707
b1b813d4
DH		 1708 hdev->sniff_max_interval = 800;
1709 hdev->sniff_min_interval = 80;
1710
1711 mutex_init(&hdev->lock);
1712 mutex_init(&hdev->req_lock);
1713
1714 INIT_LIST_HEAD(&hdev->mgmt_pending);
1715 INIT_LIST_HEAD(&hdev->blacklist);
1716 INIT_LIST_HEAD(&hdev->uuids);
1717 INIT_LIST_HEAD(&hdev->link_keys);
1718 INIT_LIST_HEAD(&hdev->long_term_keys);
1719 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 1720 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 1721
1722 INIT_WORK(&hdev->rx_work, hci_rx_work);
1723 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1724 INIT_WORK(&hdev->tx_work, hci_tx_work);
1725 INIT_WORK(&hdev->power_on, hci_power_on);
1726 INIT_WORK(&hdev->le_scan, le_scan_work);
1727
b1b813d4
DH		 1728 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1729 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1730 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1731
9be0dab7 1732 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 1733 skb_queue_head_init(&hdev->rx_q);
1734 skb_queue_head_init(&hdev->cmd_q);
1735 skb_queue_head_init(&hdev->raw_q);
1736
1737 init_waitqueue_head(&hdev->req_wait_q);
1738
bda4f23a 1739 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 1740
b1b813d4
DH		 1741 hci_init_sysfs(hdev);
1742 discovery_init(hdev);
9be0dab7
DH		 1743
1744 return hdev;
1745}
1746EXPORT_SYMBOL(hci_alloc_dev);
1747
1748/* Free HCI device */
1749void hci_free_dev(struct hci_dev *hdev)
1750{
1751 skb_queue_purge(&hdev->driver_init);
1752
1753 /* will free via device release */
1754 put_device(&hdev->dev);
1755}
1756EXPORT_SYMBOL(hci_free_dev);
1757
1da177e4
LT		 1758/* Register HCI device */
1759int hci_register_dev(struct hci_dev *hdev)
1760{
b1b813d4 1761 int id, error;
1da177e4 1762
010666a1 1763 if (!hdev->open || !hdev->close)
1da177e4
LT		 1764 return -EINVAL;
1765
08add513
MM		 1766 /* Do not allow HCI_AMP devices to register at index 0,
1767 * so the index can be used as the AMP controller ID.
1768 */
3df92b31
SL		 1769 switch (hdev->dev_type) {
1770 case HCI_BREDR:
1771 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
1772 break;
1773 case HCI_AMP:
1774 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
1775 break;
1776 default:
1777 return -EINVAL;
1da177e4 1778 }
8e87d142 1779
3df92b31
SL		 1780 if (id < 0)
1781 return id;
1782
1da177e4
LT		 1783 sprintf(hdev->name, "hci%d", id);
1784 hdev->id = id;
2d8b3a11
AE		 1785
1786 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1787
3df92b31
SL		 1788 write_lock(&hci_dev_list_lock);
1789 list_add(&hdev->list, &hci_dev_list);
f20d09d5 1790 write_unlock(&hci_dev_list_lock);
1da177e4 1791
32845eb1 1792 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 1793 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1794 if (!hdev->workqueue) {
1795 error = -ENOMEM;
1796 goto err;
1797 }
f48fd9c8 1798
6ead1bbc
JH		 1799 hdev->req_workqueue = alloc_workqueue(hdev->name,
1800 WQ_HIGHPRI | WQ_UNBOUND |
1801 WQ_MEM_RECLAIM, 1);
1802 if (!hdev->req_workqueue) {
1803 destroy_workqueue(hdev->workqueue);
1804 error = -ENOMEM;
1805 goto err;
1806 }
1807
33ca954d
DH		 1808 error = hci_add_sysfs(hdev);
1809 if (error < 0)
1810 goto err_wqueue;
1da177e4 1811
611b30f7 1812 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 1813 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1814 hdev);
611b30f7
MH		 1815 if (hdev->rfkill) {
1816 if (rfkill_register(hdev->rfkill) < 0) {
1817 rfkill_destroy(hdev->rfkill);
1818 hdev->rfkill = NULL;
1819 }
1820 }
1821
a8b2d5c2 1822 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 1823
1824 if (hdev->dev_type != HCI_AMP)
1825 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1826
1da177e4 1827 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1828 hci_dev_hold(hdev);
1da177e4 1829
19202573 1830 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 1831
1da177e4 1832 return id;
f48fd9c8 1833
33ca954d
DH		 1834err_wqueue:
1835 destroy_workqueue(hdev->workqueue);
6ead1bbc 1836 destroy_workqueue(hdev->req_workqueue);
33ca954d 1837err:
3df92b31 1838 ida_simple_remove(&hci_index_ida, hdev->id);
f20d09d5 1839 write_lock(&hci_dev_list_lock);
f48fd9c8 1840 list_del(&hdev->list);
f20d09d5 1841 write_unlock(&hci_dev_list_lock);
f48fd9c8 1842
33ca954d 1843 return error;
1da177e4
LT		 1844}
1845EXPORT_SYMBOL(hci_register_dev);
1846
1847/* Unregister HCI device */
59735631 1848void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1849{
3df92b31 1850 int i, id;
ef222013 1851
c13854ce 1852 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1853
94324962
JH		 1854 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1855
3df92b31
SL		 1856 id = hdev->id;
1857
f20d09d5 1858 write_lock(&hci_dev_list_lock);
1da177e4 1859 list_del(&hdev->list);
f20d09d5 1860 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1861
1862 hci_dev_do_close(hdev);
1863
cd4c5391 1864 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1865 kfree_skb(hdev->reassembly[i]);
1866
b9b5ef18
GP		 1867 cancel_work_sync(&hdev->power_on);
1868
ab81cbf9 1869 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 1870 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1871 hci_dev_lock(hdev);
744cf19e 1872 mgmt_index_removed(hdev);
09fd0de5 1873 hci_dev_unlock(hdev);
56e5cb86 1874 }
ab81cbf9 1875
2e58ef3e
JH		 1876 /* mgmt_index_removed should take care of emptying the
1877 * pending list */
1878 BUG_ON(!list_empty(&hdev->mgmt_pending));
1879
1da177e4
LT		 1880 hci_notify(hdev, HCI_DEV_UNREG);
1881
611b30f7
MH		 1882 if (hdev->rfkill) {
1883 rfkill_unregister(hdev->rfkill);
1884 rfkill_destroy(hdev->rfkill);
1885 }
1886
ce242970 1887 hci_del_sysfs(hdev);
147e2d59 1888
f48fd9c8 1889 destroy_workqueue(hdev->workqueue);
6ead1bbc 1890 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 1891
09fd0de5 1892 hci_dev_lock(hdev);
e2e0cacb 1893 hci_blacklist_clear(hdev);
2aeb9a1a 1894 hci_uuids_clear(hdev);
55ed8ca1 1895 hci_link_keys_clear(hdev);
b899efaf 1896 hci_smp_ltks_clear(hdev);
2763eda6 1897 hci_remote_oob_data_clear(hdev);
09fd0de5 1898 hci_dev_unlock(hdev);
e2e0cacb 1899
dc946bd8 1900 hci_dev_put(hdev);
3df92b31
SL		 1901
1902 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 1903}
1904EXPORT_SYMBOL(hci_unregister_dev);
1905
1906/* Suspend HCI device */
1907int hci_suspend_dev(struct hci_dev *hdev)
1908{
1909 hci_notify(hdev, HCI_DEV_SUSPEND);
1910 return 0;
1911}
1912EXPORT_SYMBOL(hci_suspend_dev);
1913
1914/* Resume HCI device */
1915int hci_resume_dev(struct hci_dev *hdev)
1916{
1917 hci_notify(hdev, HCI_DEV_RESUME);
1918 return 0;
1919}
1920EXPORT_SYMBOL(hci_resume_dev);
1921
76bca880
MH		 1922/* Receive frame from HCI drivers */
1923int hci_recv_frame(struct sk_buff *skb)
1924{
1925 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1926 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 1927 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 1928 kfree_skb(skb);
1929 return -ENXIO;
1930 }
1931
d82603c6 1932 /* Incoming skb */
76bca880
MH		 1933 bt_cb(skb)->incoming = 1;
1934
1935 /* Time stamp */
1936 __net_timestamp(skb);
1937
76bca880 1938 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1939 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1940
76bca880
MH		 1941 return 0;
1942}
1943EXPORT_SYMBOL(hci_recv_frame);
1944
33e882a5 1945static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 1946 int count, __u8 index)
33e882a5
SS		 1947{
1948 int len = 0;
1949 int hlen = 0;
1950 int remain = count;
1951 struct sk_buff *skb;
1952 struct bt_skb_cb *scb;
1953
1954 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 1955 index >= NUM_REASSEMBLY)
33e882a5
SS		 1956 return -EILSEQ;
1957
1958 skb = hdev->reassembly[index];
1959
1960 if (!skb) {
1961 switch (type) {
1962 case HCI_ACLDATA_PKT:
1963 len = HCI_MAX_FRAME_SIZE;
1964 hlen = HCI_ACL_HDR_SIZE;
1965 break;
1966 case HCI_EVENT_PKT:
1967 len = HCI_MAX_EVENT_SIZE;
1968 hlen = HCI_EVENT_HDR_SIZE;
1969 break;
1970 case HCI_SCODATA_PKT:
1971 len = HCI_MAX_SCO_SIZE;
1972 hlen = HCI_SCO_HDR_SIZE;
1973 break;
1974 }
1975
1e429f38 1976 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1977 if (!skb)
1978 return -ENOMEM;
1979
1980 scb = (void *) skb->cb;
1981 scb->expect = hlen;
1982 scb->pkt_type = type;
1983
1984 skb->dev = (void *) hdev;
1985 hdev->reassembly[index] = skb;
1986 }
1987
1988 while (count) {
1989 scb = (void *) skb->cb;
89bb46d0 1990 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1991
1992 memcpy(skb_put(skb, len), data, len);
1993
1994 count -= len;
1995 data += len;
1996 scb->expect -= len;
1997 remain = count;
1998
1999 switch (type) {
2000 case HCI_EVENT_PKT:
2001 if (skb->len == HCI_EVENT_HDR_SIZE) {
2002 struct hci_event_hdr *h = hci_event_hdr(skb);
2003 scb->expect = h->plen;
2004
2005 if (skb_tailroom(skb) < scb->expect) {
2006 kfree_skb(skb);
2007 hdev->reassembly[index] = NULL;
2008 return -ENOMEM;
2009 }
2010 }
2011 break;
2012
2013 case HCI_ACLDATA_PKT:
2014 if (skb->len == HCI_ACL_HDR_SIZE) {
2015 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2016 scb->expect = __le16_to_cpu(h->dlen);
2017
2018 if (skb_tailroom(skb) < scb->expect) {
2019 kfree_skb(skb);
2020 hdev->reassembly[index] = NULL;
2021 return -ENOMEM;
2022 }
2023 }
2024 break;
2025
2026 case HCI_SCODATA_PKT:
2027 if (skb->len == HCI_SCO_HDR_SIZE) {
2028 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2029 scb->expect = h->dlen;
2030
2031 if (skb_tailroom(skb) < scb->expect) {
2032 kfree_skb(skb);
2033 hdev->reassembly[index] = NULL;
2034 return -ENOMEM;
2035 }
2036 }
2037 break;
2038 }
2039
2040 if (scb->expect == 0) {
2041 /* Complete frame */
2042
2043 bt_cb(skb)->pkt_type = type;
2044 hci_recv_frame(skb);
2045
2046 hdev->reassembly[index] = NULL;
2047 return remain;
2048 }
2049 }
2050
2051 return remain;
2052}
2053
ef222013
MH		 2054int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2055{
f39a3c06
SS		 2056 int rem = 0;
2057
ef222013
MH		 2058 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2059 return -EILSEQ;
2060
da5f6c37 2061 while (count) {
1e429f38 2062 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2063 if (rem < 0)
2064 return rem;
ef222013 2065
f39a3c06
SS		 2066 data += (count - rem);
2067 count = rem;
f81c6224 2068 }
ef222013 2069
f39a3c06 2070 return rem;
ef222013
MH		 2071}
2072EXPORT_SYMBOL(hci_recv_fragment);
2073
99811510
SS		 2074#define STREAM_REASSEMBLY 0
2075
2076int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2077{
2078 int type;
2079 int rem = 0;
2080
da5f6c37 2081 while (count) {
99811510
SS		 2082 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2083
2084 if (!skb) {
2085 struct { char type; } *pkt;
2086
2087 /* Start of the frame */
2088 pkt = data;
2089 type = pkt->type;
2090
2091 data++;
2092 count--;
2093 } else
2094 type = bt_cb(skb)->pkt_type;
2095
1e429f38 2096 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2097 STREAM_REASSEMBLY);
99811510
SS		 2098 if (rem < 0)
2099 return rem;
2100
2101 data += (count - rem);
2102 count = rem;
f81c6224 2103 }
99811510
SS		 2104
2105 return rem;
2106}
2107EXPORT_SYMBOL(hci_recv_stream_fragment);
2108
1da177e4
LT		 2109/* ---- Interface to upper protocols ---- */
2110
1da177e4
LT		 2111int hci_register_cb(struct hci_cb *cb)
2112{
2113 BT_DBG("%p name %s", cb, cb->name);
2114
f20d09d5 2115 write_lock(&hci_cb_list_lock);
1da177e4 2116 list_add(&cb->list, &hci_cb_list);
f20d09d5 2117 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2118
2119 return 0;
2120}
2121EXPORT_SYMBOL(hci_register_cb);
2122
2123int hci_unregister_cb(struct hci_cb *cb)
2124{
2125 BT_DBG("%p name %s", cb, cb->name);
2126
f20d09d5 2127 write_lock(&hci_cb_list_lock);
1da177e4 2128 list_del(&cb->list);
f20d09d5 2129 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2130
2131 return 0;
2132}
2133EXPORT_SYMBOL(hci_unregister_cb);
2134
2135static int hci_send_frame(struct sk_buff *skb)
2136{
2137 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2138
2139 if (!hdev) {
2140 kfree_skb(skb);
2141 return -ENODEV;
2142 }
2143
0d48d939 2144 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2145
cd82e61c
MH		 2146 /* Time stamp */
2147 __net_timestamp(skb);
1da177e4 2148
cd82e61c
MH		 2149 /* Send copy to monitor */
2150 hci_send_to_monitor(hdev, skb);
2151
2152 if (atomic_read(&hdev->promisc)) {
2153 /* Send copy to the sockets */
470fe1b5 2154 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2155 }
2156
2157 /* Get rid of skb owner, prior to sending to the driver. */
2158 skb_orphan(skb);
2159
2160 return hdev->send(skb);
2161}
2162
2163/* Send HCI command */
a9de9248 2164int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2165{
2166 int len = HCI_COMMAND_HDR_SIZE + plen;
2167 struct hci_command_hdr *hdr;
2168 struct sk_buff *skb;
2169
f0e09510 2170 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2171
2172 skb = bt_skb_alloc(len, GFP_ATOMIC);
2173 if (!skb) {
ef222013 2174 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2175 return -ENOMEM;
2176 }
2177
2178 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2179 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2180 hdr->plen = plen;
2181
2182 if (plen)
2183 memcpy(skb_put(skb, plen), param, plen);
2184
2185 BT_DBG("skb len %d", skb->len);
2186
0d48d939 2187 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2188 skb->dev = (void *) hdev;
c78ae283 2189
a5040efa
JH		 2190 if (test_bit(HCI_INIT, &hdev->flags))
2191 hdev->init_last_cmd = opcode;
2192
1da177e4 2193 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2194 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2195
2196 return 0;
2197}
1da177e4
LT		 2198
2199/* Get data from the previously sent command */
a9de9248 2200void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2201{
2202 struct hci_command_hdr *hdr;
2203
2204 if (!hdev->sent_cmd)
2205 return NULL;
2206
2207 hdr = (void *) hdev->sent_cmd->data;
2208
a9de9248 2209 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2210 return NULL;
2211
f0e09510 2212 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2213
2214 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2215}
2216
2217/* Send ACL data */
2218static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2219{
2220 struct hci_acl_hdr *hdr;
2221 int len = skb->len;
2222
badff6d0
ACM		 2223 skb_push(skb, HCI_ACL_HDR_SIZE);
2224 skb_reset_transport_header(skb);
9c70220b 2225 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2226 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2227 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2228}
2229
ee22be7e 2230static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2231 struct sk_buff *skb, __u16 flags)
1da177e4 2232{
ee22be7e 2233 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2234 struct hci_dev *hdev = conn->hdev;
2235 struct sk_buff *list;
2236
087bfd99
GP		 2237 skb->len = skb_headlen(skb);
2238 skb->data_len = 0;
2239
2240 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2241
2242 switch (hdev->dev_type) {
2243 case HCI_BREDR:
2244 hci_add_acl_hdr(skb, conn->handle, flags);
2245 break;
2246 case HCI_AMP:
2247 hci_add_acl_hdr(skb, chan->handle, flags);
2248 break;
2249 default:
2250 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2251 return;
2252 }
087bfd99 2253
70f23020
AE		 2254 list = skb_shinfo(skb)->frag_list;
2255 if (!list) {
1da177e4
LT		 2256 /* Non fragmented */
2257 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2258
73d80deb 2259 skb_queue_tail(queue, skb);
1da177e4
LT		 2260 } else {
2261 /* Fragmented */
2262 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2263
2264 skb_shinfo(skb)->frag_list = NULL;
2265
2266 /* Queue all fragments atomically */
af3e6359 2267 spin_lock(&queue->lock);
1da177e4 2268
73d80deb 2269 __skb_queue_tail(queue, skb);
e702112f
AE		 2270
2271 flags &= ~ACL_START;
2272 flags |= ACL_CONT;
1da177e4
LT		 2273 do {
2274 skb = list; list = list->next;
8e87d142 2275
1da177e4 2276 skb->dev = (void *) hdev;
0d48d939 2277 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2278 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2279
2280 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2281
73d80deb 2282 __skb_queue_tail(queue, skb);
1da177e4
LT		 2283 } while (list);
2284
af3e6359 2285 spin_unlock(&queue->lock);
1da177e4 2286 }
73d80deb
LAD		 2287}
2288
2289void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2290{
ee22be7e 2291 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2292
f0e09510 2293 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2294
2295 skb->dev = (void *) hdev;
73d80deb 2296
ee22be7e 2297 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2298
3eff45ea 2299 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2300}
1da177e4
LT		 2301
2302/* Send SCO data */
0d861d8b 2303void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2304{
2305 struct hci_dev *hdev = conn->hdev;
2306 struct hci_sco_hdr hdr;
2307
2308 BT_DBG("%s len %d", hdev->name, skb->len);
2309
aca3192c 2310 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2311 hdr.dlen = skb->len;
2312
badff6d0
ACM		 2313 skb_push(skb, HCI_SCO_HDR_SIZE);
2314 skb_reset_transport_header(skb);
9c70220b 2315 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2316
2317 skb->dev = (void *) hdev;
0d48d939 2318 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2319
1da177e4 2320 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2321 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2322}
1da177e4
LT		 2323
2324/* ---- HCI TX task (outgoing data) ---- */
2325
2326/* HCI Connection scheduler */
6039aa73
GP		 2327static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2328 int *quote)
1da177e4
LT		 2329{
2330 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2331 struct hci_conn *conn = NULL, *c;
abc5de8f 2332 unsigned int num = 0, min = ~0;
1da177e4 2333
8e87d142 2334 /* We don't have to lock device here. Connections are always
1da177e4 2335 * added and removed with TX task disabled. */
bf4c6325
GP		 2336
2337 rcu_read_lock();
2338
2339 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2340 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2341 continue;
769be974
MH		 2342
2343 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2344 continue;
2345
1da177e4
LT		 2346 num++;
2347
2348 if (c->sent < min) {
2349 min = c->sent;
2350 conn = c;
2351 }
52087a79
LAD		 2352
2353 if (hci_conn_num(hdev, type) == num)
2354 break;
1da177e4
LT		 2355 }
2356
bf4c6325
GP		 2357 rcu_read_unlock();
2358
1da177e4 2359 if (conn) {
6ed58ec5
VT		 2360 int cnt, q;
2361
2362 switch (conn->type) {
2363 case ACL_LINK:
2364 cnt = hdev->acl_cnt;
2365 break;
2366 case SCO_LINK:
2367 case ESCO_LINK:
2368 cnt = hdev->sco_cnt;
2369 break;
2370 case LE_LINK:
2371 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2372 break;
2373 default:
2374 cnt = 0;
2375 BT_ERR("Unknown link type");
2376 }
2377
2378 q = cnt / num;
1da177e4
LT		 2379 *quote = q ? q : 1;
2380 } else
2381 *quote = 0;
2382
2383 BT_DBG("conn %p quote %d", conn, *quote);
2384 return conn;
2385}
2386
6039aa73 2387static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2388{
2389 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2390 struct hci_conn *c;
1da177e4 2391
bae1f5d9 2392 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2393
bf4c6325
GP		 2394 rcu_read_lock();
2395
1da177e4 2396 /* Kill stalled connections */
bf4c6325 2397 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2398 if (c->type == type && c->sent) {
6ed93dc6
AE		 2399 BT_ERR("%s killing stalled connection %pMR",
2400 hdev->name, &c->dst);
bed71748 2401 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2402 }
2403 }
bf4c6325
GP		 2404
2405 rcu_read_unlock();
1da177e4
LT		 2406}
2407
6039aa73
GP		 2408static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2409 int *quote)
1da177e4 2410{
73d80deb
LAD		 2411 struct hci_conn_hash *h = &hdev->conn_hash;
2412 struct hci_chan *chan = NULL;
abc5de8f 2413 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2414 struct hci_conn *conn;
73d80deb
LAD		 2415 int cnt, q, conn_num = 0;
2416
2417 BT_DBG("%s", hdev->name);
2418
bf4c6325
GP		 2419 rcu_read_lock();
2420
2421 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2422 struct hci_chan *tmp;
2423
2424 if (conn->type != type)
2425 continue;
2426
2427 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2428 continue;
2429
2430 conn_num++;
2431
8192edef 2432 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2433 struct sk_buff *skb;
2434
2435 if (skb_queue_empty(&tmp->data_q))
2436 continue;
2437
2438 skb = skb_peek(&tmp->data_q);
2439 if (skb->priority < cur_prio)
2440 continue;
2441
2442 if (skb->priority > cur_prio) {
2443 num = 0;
2444 min = ~0;
2445 cur_prio = skb->priority;
2446 }
2447
2448 num++;
2449
2450 if (conn->sent < min) {
2451 min = conn->sent;
2452 chan = tmp;
2453 }
2454 }
2455
2456 if (hci_conn_num(hdev, type) == conn_num)
2457 break;
2458 }
2459
bf4c6325
GP		 2460 rcu_read_unlock();
2461
73d80deb
LAD		 2462 if (!chan)
2463 return NULL;
2464
2465 switch (chan->conn->type) {
2466 case ACL_LINK:
2467 cnt = hdev->acl_cnt;
2468 break;
bd1eb66b
AE		 2469 case AMP_LINK:
2470 cnt = hdev->block_cnt;
2471 break;
73d80deb
LAD		 2472 case SCO_LINK:
2473 case ESCO_LINK:
2474 cnt = hdev->sco_cnt;
2475 break;
2476 case LE_LINK:
2477 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2478 break;
2479 default:
2480 cnt = 0;
2481 BT_ERR("Unknown link type");
2482 }
2483
2484 q = cnt / num;
2485 *quote = q ? q : 1;
2486 BT_DBG("chan %p quote %d", chan, *quote);
2487 return chan;
2488}
2489
02b20f0b
LAD		 2490static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2491{
2492 struct hci_conn_hash *h = &hdev->conn_hash;
2493 struct hci_conn *conn;
2494 int num = 0;
2495
2496 BT_DBG("%s", hdev->name);
2497
bf4c6325
GP		 2498 rcu_read_lock();
2499
2500 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2501 struct hci_chan *chan;
2502
2503 if (conn->type != type)
2504 continue;
2505
2506 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2507 continue;
2508
2509 num++;
2510
8192edef 2511 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2512 struct sk_buff *skb;
2513
2514 if (chan->sent) {
2515 chan->sent = 0;
2516 continue;
2517 }
2518
2519 if (skb_queue_empty(&chan->data_q))
2520 continue;
2521
2522 skb = skb_peek(&chan->data_q);
2523 if (skb->priority >= HCI_PRIO_MAX - 1)
2524 continue;
2525
2526 skb->priority = HCI_PRIO_MAX - 1;
2527
2528 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2529 skb->priority);
02b20f0b
LAD		 2530 }
2531
2532 if (hci_conn_num(hdev, type) == num)
2533 break;
2534 }
bf4c6325
GP		 2535
2536 rcu_read_unlock();
2537
02b20f0b
LAD		 2538}
2539
b71d385a
AE		 2540static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2541{
2542 /* Calculate count of blocks used by this packet */
2543 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2544}
2545
6039aa73 2546static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2547{
1da177e4
LT		 2548 if (!test_bit(HCI_RAW, &hdev->flags)) {
2549 /* ACL tx timeout must be longer than maximum
2550 * link supervision timeout (40.9 seconds) */
63d2bc1b 2551 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 2552 HCI_ACL_TX_TIMEOUT))
bae1f5d9 2553 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2554 }
63d2bc1b 2555}
1da177e4 2556
6039aa73 2557static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 2558{
2559 unsigned int cnt = hdev->acl_cnt;
2560 struct hci_chan *chan;
2561 struct sk_buff *skb;
2562 int quote;
2563
2564 __check_timeout(hdev, cnt);
04837f64 2565
73d80deb 2566 while (hdev->acl_cnt &&
a8c5fb1a 2567 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2568 u32 priority = (skb_peek(&chan->data_q))->priority;
2569 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2570 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2571 skb->len, skb->priority);
73d80deb 2572
ec1cce24
LAD		 2573 /* Stop if priority has changed */
2574 if (skb->priority < priority)
2575 break;
2576
2577 skb = skb_dequeue(&chan->data_q);
2578
73d80deb 2579 hci_conn_enter_active_mode(chan->conn,
04124681 2580 bt_cb(skb)->force_active);
04837f64 2581
1da177e4
LT		 2582 hci_send_frame(skb);
2583 hdev->acl_last_tx = jiffies;
2584
2585 hdev->acl_cnt--;
73d80deb
LAD		 2586 chan->sent++;
2587 chan->conn->sent++;
1da177e4
LT		 2588 }
2589 }
02b20f0b
LAD		 2590
2591 if (cnt != hdev->acl_cnt)
2592 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2593}
2594
6039aa73 2595static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 2596{
63d2bc1b 2597 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2598 struct hci_chan *chan;
2599 struct sk_buff *skb;
2600 int quote;
bd1eb66b 2601 u8 type;
b71d385a 2602
63d2bc1b 2603 __check_timeout(hdev, cnt);
b71d385a 2604
bd1eb66b
AE		 2605 BT_DBG("%s", hdev->name);
2606
2607 if (hdev->dev_type == HCI_AMP)
2608 type = AMP_LINK;
2609 else
2610 type = ACL_LINK;
2611
b71d385a 2612 while (hdev->block_cnt > 0 &&
bd1eb66b 2613 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 2614 u32 priority = (skb_peek(&chan->data_q))->priority;
2615 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2616 int blocks;
2617
2618 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2619 skb->len, skb->priority);
b71d385a
AE		 2620
2621 /* Stop if priority has changed */
2622 if (skb->priority < priority)
2623 break;
2624
2625 skb = skb_dequeue(&chan->data_q);
2626
2627 blocks = __get_blocks(hdev, skb);
2628 if (blocks > hdev->block_cnt)
2629 return;
2630
2631 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2632 bt_cb(skb)->force_active);
b71d385a
AE		 2633
2634 hci_send_frame(skb);
2635 hdev->acl_last_tx = jiffies;
2636
2637 hdev->block_cnt -= blocks;
2638 quote -= blocks;
2639
2640 chan->sent += blocks;
2641 chan->conn->sent += blocks;
2642 }
2643 }
2644
2645 if (cnt != hdev->block_cnt)
bd1eb66b 2646 hci_prio_recalculate(hdev, type);
b71d385a
AE		 2647}
2648
6039aa73 2649static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 2650{
2651 BT_DBG("%s", hdev->name);
2652
bd1eb66b
AE		 2653 /* No ACL link over BR/EDR controller */
2654 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
2655 return;
2656
2657 /* No AMP link over AMP controller */
2658 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 2659 return;
2660
2661 switch (hdev->flow_ctl_mode) {
2662 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2663 hci_sched_acl_pkt(hdev);
2664 break;
2665
2666 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2667 hci_sched_acl_blk(hdev);
2668 break;
2669 }
2670}
2671
1da177e4 2672/* Schedule SCO */
6039aa73 2673static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 2674{
2675 struct hci_conn *conn;
2676 struct sk_buff *skb;
2677 int quote;
2678
2679 BT_DBG("%s", hdev->name);
2680
52087a79
LAD		 2681 if (!hci_conn_num(hdev, SCO_LINK))
2682 return;
2683
1da177e4
LT		 2684 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2685 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2686 BT_DBG("skb %p len %d", skb, skb->len);
2687 hci_send_frame(skb);
2688
2689 conn->sent++;
2690 if (conn->sent == ~0)
2691 conn->sent = 0;
2692 }
2693 }
2694}
2695
6039aa73 2696static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 2697{
2698 struct hci_conn *conn;
2699 struct sk_buff *skb;
2700 int quote;
2701
2702 BT_DBG("%s", hdev->name);
2703
52087a79
LAD		 2704 if (!hci_conn_num(hdev, ESCO_LINK))
2705 return;
2706
8fc9ced3
GP		 2707 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2708 &quote))) {
b6a0dc82
MH		 2709 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2710 BT_DBG("skb %p len %d", skb, skb->len);
2711 hci_send_frame(skb);
2712
2713 conn->sent++;
2714 if (conn->sent == ~0)
2715 conn->sent = 0;
2716 }
2717 }
2718}
2719
6039aa73 2720static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 2721{
73d80deb 2722 struct hci_chan *chan;
6ed58ec5 2723 struct sk_buff *skb;
02b20f0b 2724 int quote, cnt, tmp;
6ed58ec5
VT		 2725
2726 BT_DBG("%s", hdev->name);
2727
52087a79
LAD		 2728 if (!hci_conn_num(hdev, LE_LINK))
2729 return;
2730
6ed58ec5
VT		 2731 if (!test_bit(HCI_RAW, &hdev->flags)) {
2732 /* LE tx timeout must be longer than maximum
2733 * link supervision timeout (40.9 seconds) */
bae1f5d9 2734 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 2735 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2736 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2737 }
2738
2739 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2740 tmp = cnt;
73d80deb 2741 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2742 u32 priority = (skb_peek(&chan->data_q))->priority;
2743 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2744 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2745 skb->len, skb->priority);
6ed58ec5 2746
ec1cce24
LAD		 2747 /* Stop if priority has changed */
2748 if (skb->priority < priority)
2749 break;
2750
2751 skb = skb_dequeue(&chan->data_q);
2752
6ed58ec5
VT		 2753 hci_send_frame(skb);
2754 hdev->le_last_tx = jiffies;
2755
2756 cnt--;
73d80deb
LAD		 2757 chan->sent++;
2758 chan->conn->sent++;
6ed58ec5
VT		 2759 }
2760 }
73d80deb 2761
6ed58ec5
VT		 2762 if (hdev->le_pkts)
2763 hdev->le_cnt = cnt;
2764 else
2765 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2766
2767 if (cnt != tmp)
2768 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2769}
2770
3eff45ea 2771static void hci_tx_work(struct work_struct *work)
1da177e4 2772{
3eff45ea 2773 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2774 struct sk_buff *skb;
2775
6ed58ec5 2776 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 2777 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2778
2779 /* Schedule queues and send stuff to HCI driver */
2780
2781 hci_sched_acl(hdev);
2782
2783 hci_sched_sco(hdev);
2784
b6a0dc82
MH		 2785 hci_sched_esco(hdev);
2786
6ed58ec5
VT		 2787 hci_sched_le(hdev);
2788
1da177e4
LT		 2789 /* Send next queued raw (unknown type) packet */
2790 while ((skb = skb_dequeue(&hdev->raw_q)))
2791 hci_send_frame(skb);
1da177e4
LT		 2792}
2793
25985edc 2794/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2795
2796/* ACL data packet */
6039aa73 2797static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2798{
2799 struct hci_acl_hdr *hdr = (void *) skb->data;
2800 struct hci_conn *conn;
2801 __u16 handle, flags;
2802
2803 skb_pull(skb, HCI_ACL_HDR_SIZE);
2804
2805 handle = __le16_to_cpu(hdr->handle);
2806 flags = hci_flags(handle);
2807 handle = hci_handle(handle);
2808
f0e09510 2809 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 2810 handle, flags);
1da177e4
LT		 2811
2812 hdev->stat.acl_rx++;
2813
2814 hci_dev_lock(hdev);
2815 conn = hci_conn_hash_lookup_handle(hdev, handle);
2816 hci_dev_unlock(hdev);
8e87d142 2817
1da177e4 2818 if (conn) {
65983fc7 2819 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2820
1da177e4 2821 /* Send to upper protocol */
686ebf28
UF		 2822 l2cap_recv_acldata(conn, skb, flags);
2823 return;
1da177e4 2824 } else {
8e87d142 2825 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 2826 hdev->name, handle);
1da177e4
LT		 2827 }
2828
2829 kfree_skb(skb);
2830}
2831
2832/* SCO data packet */
6039aa73 2833static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2834{
2835 struct hci_sco_hdr *hdr = (void *) skb->data;
2836 struct hci_conn *conn;
2837 __u16 handle;
2838
2839 skb_pull(skb, HCI_SCO_HDR_SIZE);
2840
2841 handle = __le16_to_cpu(hdr->handle);
2842
f0e09510 2843 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 2844
2845 hdev->stat.sco_rx++;
2846
2847 hci_dev_lock(hdev);
2848 conn = hci_conn_hash_lookup_handle(hdev, handle);
2849 hci_dev_unlock(hdev);
2850
2851 if (conn) {
1da177e4 2852 /* Send to upper protocol */
686ebf28
UF		 2853 sco_recv_scodata(conn, skb);
2854 return;
1da177e4 2855 } else {
8e87d142 2856 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 2857 hdev->name, handle);
1da177e4
LT		 2858 }
2859
2860 kfree_skb(skb);
2861}
2862
b78752cc 2863static void hci_rx_work(struct work_struct *work)
1da177e4 2864{
b78752cc 2865 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2866 struct sk_buff *skb;
2867
2868 BT_DBG("%s", hdev->name);
2869
1da177e4 2870 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2871 /* Send copy to monitor */
2872 hci_send_to_monitor(hdev, skb);
2873
1da177e4
LT		 2874 if (atomic_read(&hdev->promisc)) {
2875 /* Send copy to the sockets */
470fe1b5 2876 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2877 }
2878
2879 if (test_bit(HCI_RAW, &hdev->flags)) {
2880 kfree_skb(skb);
2881 continue;
2882 }
2883
2884 if (test_bit(HCI_INIT, &hdev->flags)) {
2885 /* Don't process data packets in this states. */
0d48d939 2886 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2887 case HCI_ACLDATA_PKT:
2888 case HCI_SCODATA_PKT:
2889 kfree_skb(skb);
2890 continue;
3ff50b79 2891 }
1da177e4
LT		 2892 }
2893
2894 /* Process frame */
0d48d939 2895 switch (bt_cb(skb)->pkt_type) {
1da177e4 2896 case HCI_EVENT_PKT:
b78752cc 2897 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2898 hci_event_packet(hdev, skb);
2899 break;
2900
2901 case HCI_ACLDATA_PKT:
2902 BT_DBG("%s ACL data packet", hdev->name);
2903 hci_acldata_packet(hdev, skb);
2904 break;
2905
2906 case HCI_SCODATA_PKT:
2907 BT_DBG("%s SCO data packet", hdev->name);
2908 hci_scodata_packet(hdev, skb);
2909 break;
2910
2911 default:
2912 kfree_skb(skb);
2913 break;
2914 }
2915 }
1da177e4
LT		 2916}
2917
c347b765 2918static void hci_cmd_work(struct work_struct *work)
1da177e4 2919{
c347b765 2920 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2921 struct sk_buff *skb;
2922
2104786b
AE		 2923 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
2924 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 2925
1da177e4 2926 /* Send queued commands */
5a08ecce
AE		 2927 if (atomic_read(&hdev->cmd_cnt)) {
2928 skb = skb_dequeue(&hdev->cmd_q);
2929 if (!skb)
2930 return;
2931
7585b97a 2932 kfree_skb(hdev->sent_cmd);
1da177e4 2933
70f23020
AE		 2934 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2935 if (hdev->sent_cmd) {
1da177e4
LT		 2936 atomic_dec(&hdev->cmd_cnt);
2937 hci_send_frame(skb);
7bdb8a5c
SJ		 2938 if (test_bit(HCI_RESET, &hdev->flags))
2939 del_timer(&hdev->cmd_timer);
2940 else
2941 mod_timer(&hdev->cmd_timer,
5f246e89 2942 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 2943 } else {
2944 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2945 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2946 }
2947 }
2948}
2519a1fc
AG		 2949
2950int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2951{
2952 /* General inquiry access code (GIAC) */
2953 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2954 struct hci_cp_inquiry cp;
2955
2956 BT_DBG("%s", hdev->name);
2957
2958 if (test_bit(HCI_INQUIRY, &hdev->flags))
2959 return -EINPROGRESS;
2960
4663262c
JH		 2961 inquiry_cache_flush(hdev);
2962
2519a1fc
AG		 2963 memset(&cp, 0, sizeof(cp));
2964 memcpy(&cp.lap, lap, sizeof(cp.lap));
2965 cp.length = length;
2966
2967 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2968}
023d5049
AG		 2969
2970int hci_cancel_inquiry(struct hci_dev *hdev)
2971{
2972 BT_DBG("%s", hdev->name);
2973
2974 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2975 return -EALREADY;
023d5049
AG		 2976
2977 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2978}
31f7956c
AG		 2979
2980u8 bdaddr_to_le(u8 bdaddr_type)
2981{
2982 switch (bdaddr_type) {
2983 case BDADDR_LE_PUBLIC:
2984 return ADDR_LE_DEV_PUBLIC;
2985
2986 default:
2987 /* Fallback to LE Random address type */
2988 return ADDR_LE_DEV_RANDOM;
2989 }
2990}
kernel source for telekom puls (alcatel/mediatek)