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Bluetooth: Fix freeing uninitialized delayed works
[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{
b0916ea0 181 struct hci_cp_delete_stored_link_key cp;
1ebb9252 182 __le16 param;
89f2783d 183 __u8 flt_type;
1da177e4 184
2455a3ea
AE		 185 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
186
1da177e4
LT		 187 /* Mandatory initialization */
188
1da177e4 189 /* Read Local Supported Features */
a9de9248 190 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 191
1143e5a6 192 /* Read Local Version */
a9de9248 193 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 194
1da177e4 195 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 196 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 197
1da177e4 198 /* Read BD Address */
a9de9248
MH		 199 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
200
201 /* Read Class of Device */
202 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
203
204 /* Read Local Name */
205 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 206
207 /* Read Voice Setting */
a9de9248 208 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 209
210 /* Optional initialization */
211
212 /* Clear Event Filters */
89f2783d 213 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 214 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 215
1da177e4 216 /* Connection accept timeout ~20 secs */
82781e63 217 param = __constant_cpu_to_le16(0x7d00);
a9de9248 218 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 219
220 bacpy(&cp.bdaddr, BDADDR_ANY);
221 cp.delete_all = 1;
222 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 223}
224
e61ef499
AE		 225static void amp_init(struct hci_dev *hdev)
226{
2455a3ea
AE		 227 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
228
e61ef499
AE		 229 /* Read Local Version */
230 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 231
232 /* Read Local AMP Info */
233 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e61ef499
AE		 234}
235
236static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
237{
238 struct sk_buff *skb;
239
240 BT_DBG("%s %ld", hdev->name, opt);
241
242 /* Driver initialization */
243
244 /* Special commands */
245 while ((skb = skb_dequeue(&hdev->driver_init))) {
246 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
247 skb->dev = (void *) hdev;
248
249 skb_queue_tail(&hdev->cmd_q, skb);
250 queue_work(hdev->workqueue, &hdev->cmd_work);
251 }
252 skb_queue_purge(&hdev->driver_init);
253
11778716
AE		 254 /* Reset */
255 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
256 hci_reset_req(hdev, 0);
257
e61ef499
AE		 258 switch (hdev->dev_type) {
259 case HCI_BREDR:
260 bredr_init(hdev);
261 break;
262
263 case HCI_AMP:
264 amp_init(hdev);
265 break;
266
267 default:
268 BT_ERR("Unknown device type %d", hdev->dev_type);
269 break;
270 }
271
272}
273
6ed58ec5
VT		 274static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
275{
276 BT_DBG("%s", hdev->name);
277
278 /* Read LE buffer size */
279 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
280}
281
1da177e4
LT		 282static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
283{
284 __u8 scan = opt;
285
286 BT_DBG("%s %x", hdev->name, scan);
287
288 /* Inquiry and Page scans */
a9de9248 289 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 290}
291
292static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
293{
294 __u8 auth = opt;
295
296 BT_DBG("%s %x", hdev->name, auth);
297
298 /* Authentication */
a9de9248 299 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 300}
301
302static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
303{
304 __u8 encrypt = opt;
305
306 BT_DBG("%s %x", hdev->name, encrypt);
307
e4e8e37c 308 /* Encryption */
a9de9248 309 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 310}
311
e4e8e37c
MH		 312static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
313{
314 __le16 policy = cpu_to_le16(opt);
315
a418b893 316 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 317
318 /* Default link policy */
319 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
320}
321
8e87d142 322/* Get HCI device by index.
1da177e4
LT		 323 * Device is held on return. */
324struct hci_dev *hci_dev_get(int index)
325{
8035ded4 326 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 327
328 BT_DBG("%d", index);
329
330 if (index < 0)
331 return NULL;
332
333 read_lock(&hci_dev_list_lock);
8035ded4 334 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 335 if (d->id == index) {
336 hdev = hci_dev_hold(d);
337 break;
338 }
339 }
340 read_unlock(&hci_dev_list_lock);
341 return hdev;
342}
1da177e4
LT		 343
344/* ---- Inquiry support ---- */
ff9ef578 345
30dc78e1
JH		 346bool hci_discovery_active(struct hci_dev *hdev)
347{
348 struct discovery_state *discov = &hdev->discovery;
349
6fbe195d 350 switch (discov->state) {
343f935b 351 case DISCOVERY_FINDING:
6fbe195d 352 case DISCOVERY_RESOLVING:
30dc78e1
JH		 353 return true;
354
6fbe195d
AG		 355 default:
356 return false;
357 }
30dc78e1
JH		 358}
359
ff9ef578
JH		 360void hci_discovery_set_state(struct hci_dev *hdev, int state)
361{
362 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
363
364 if (hdev->discovery.state == state)
365 return;
366
367 switch (state) {
368 case DISCOVERY_STOPPED:
7b99b659
AG		 369 if (hdev->discovery.state != DISCOVERY_STARTING)
370 mgmt_discovering(hdev, 0);
ff9ef578
JH		 371 break;
372 case DISCOVERY_STARTING:
373 break;
343f935b 374 case DISCOVERY_FINDING:
ff9ef578
JH		 375 mgmt_discovering(hdev, 1);
376 break;
30dc78e1
JH		 377 case DISCOVERY_RESOLVING:
378 break;
ff9ef578
JH		 379 case DISCOVERY_STOPPING:
380 break;
381 }
382
383 hdev->discovery.state = state;
384}
385
1da177e4
LT		 386static void inquiry_cache_flush(struct hci_dev *hdev)
387{
30883512 388 struct discovery_state *cache = &hdev->discovery;
b57c1a56 389 struct inquiry_entry *p, *n;
1da177e4 390
561aafbc
JH		 391 list_for_each_entry_safe(p, n, &cache->all, all) {
392 list_del(&p->all);
b57c1a56 393 kfree(p);
1da177e4 394 }
561aafbc
JH		 395
396 INIT_LIST_HEAD(&cache->unknown);
397 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 398}
399
a8c5fb1a
GP		 400struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
401 bdaddr_t *bdaddr)
1da177e4 402{
30883512 403 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 404 struct inquiry_entry *e;
405
406 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
407
561aafbc
JH		 408 list_for_each_entry(e, &cache->all, all) {
409 if (!bacmp(&e->data.bdaddr, bdaddr))
410 return e;
411 }
412
413 return NULL;
414}
415
416struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 417 bdaddr_t *bdaddr)
561aafbc 418{
30883512 419 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 420 struct inquiry_entry *e;
421
422 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
423
424 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 425 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 426 return e;
427 }
428
429 return NULL;
1da177e4
LT		 430}
431
30dc78e1 432struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 433 bdaddr_t *bdaddr,
434 int state)
30dc78e1
JH		 435{
436 struct discovery_state *cache = &hdev->discovery;
437 struct inquiry_entry *e;
438
439 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
440
441 list_for_each_entry(e, &cache->resolve, list) {
442 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
443 return e;
444 if (!bacmp(&e->data.bdaddr, bdaddr))
445 return e;
446 }
447
448 return NULL;
449}
450
a3d4e20a 451void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 452 struct inquiry_entry *ie)
a3d4e20a
JH		 453{
454 struct discovery_state *cache = &hdev->discovery;
455 struct list_head *pos = &cache->resolve;
456 struct inquiry_entry *p;
457
458 list_del(&ie->list);
459
460 list_for_each_entry(p, &cache->resolve, list) {
461 if (p->name_state != NAME_PENDING &&
a8c5fb1a 462 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 463 break;
464 pos = &p->list;
465 }
466
467 list_add(&ie->list, pos);
468}
469
3175405b 470bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 471 bool name_known, bool *ssp)
1da177e4 472{
30883512 473 struct discovery_state *cache = &hdev->discovery;
70f23020 474 struct inquiry_entry *ie;
1da177e4
LT		 475
476 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
477
388fc8fa
JH		 478 if (ssp)
479 *ssp = data->ssp_mode;
480
70f23020 481 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 482 if (ie) {
388fc8fa
JH		 483 if (ie->data.ssp_mode && ssp)
484 *ssp = true;
485
a3d4e20a 486 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 487 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 488 ie->data.rssi = data->rssi;
489 hci_inquiry_cache_update_resolve(hdev, ie);
490 }
491
561aafbc 492 goto update;
a3d4e20a 493 }
561aafbc
JH		 494
495 /* Entry not in the cache. Add new one. */
496 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
497 if (!ie)
3175405b 498 return false;
561aafbc
JH		 499
500 list_add(&ie->all, &cache->all);
501
502 if (name_known) {
503 ie->name_state = NAME_KNOWN;
504 } else {
505 ie->name_state = NAME_NOT_KNOWN;
506 list_add(&ie->list, &cache->unknown);
507 }
70f23020 508
561aafbc
JH		 509update:
510 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 511 ie->name_state != NAME_PENDING) {
561aafbc
JH		 512 ie->name_state = NAME_KNOWN;
513 list_del(&ie->list);
1da177e4
LT		 514 }
515
70f23020
AE		 516 memcpy(&ie->data, data, sizeof(*data));
517 ie->timestamp = jiffies;
1da177e4 518 cache->timestamp = jiffies;
3175405b
JH		 519
520 if (ie->name_state == NAME_NOT_KNOWN)
521 return false;
522
523 return true;
1da177e4
LT		 524}
525
526static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
527{
30883512 528 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 529 struct inquiry_info *info = (struct inquiry_info *) buf;
530 struct inquiry_entry *e;
531 int copied = 0;
532
561aafbc 533 list_for_each_entry(e, &cache->all, all) {
1da177e4 534 struct inquiry_data *data = &e->data;
b57c1a56
JH		 535
536 if (copied >= num)
537 break;
538
1da177e4
LT		 539 bacpy(&info->bdaddr, &data->bdaddr);
540 info->pscan_rep_mode = data->pscan_rep_mode;
541 info->pscan_period_mode = data->pscan_period_mode;
542 info->pscan_mode = data->pscan_mode;
543 memcpy(info->dev_class, data->dev_class, 3);
544 info->clock_offset = data->clock_offset;
b57c1a56 545
1da177e4 546 info++;
b57c1a56 547 copied++;
1da177e4
LT		 548 }
549
550 BT_DBG("cache %p, copied %d", cache, copied);
551 return copied;
552}
553
554static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
555{
556 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
557 struct hci_cp_inquiry cp;
558
559 BT_DBG("%s", hdev->name);
560
561 if (test_bit(HCI_INQUIRY, &hdev->flags))
562 return;
563
564 /* Start Inquiry */
565 memcpy(&cp.lap, &ir->lap, 3);
566 cp.length = ir->length;
567 cp.num_rsp = ir->num_rsp;
a9de9248 568 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 569}
570
571int hci_inquiry(void __user *arg)
572{
573 __u8 __user *ptr = arg;
574 struct hci_inquiry_req ir;
575 struct hci_dev *hdev;
576 int err = 0, do_inquiry = 0, max_rsp;
577 long timeo;
578 __u8 *buf;
579
580 if (copy_from_user(&ir, ptr, sizeof(ir)))
581 return -EFAULT;
582
5a08ecce
AE		 583 hdev = hci_dev_get(ir.dev_id);
584 if (!hdev)
1da177e4
LT		 585 return -ENODEV;
586
09fd0de5 587 hci_dev_lock(hdev);
8e87d142 588 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 589 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 590 inquiry_cache_flush(hdev);
591 do_inquiry = 1;
592 }
09fd0de5 593 hci_dev_unlock(hdev);
1da177e4 594
04837f64 595 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 596
597 if (do_inquiry) {
598 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
599 if (err < 0)
600 goto done;
601 }
1da177e4 602
8fc9ced3
GP		 603 /* for unlimited number of responses we will use buffer with
604 * 255 entries
605 */
1da177e4
LT		 606 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
607
608 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
609 * copy it to the user space.
610 */
01df8c31 611 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 612 if (!buf) {
1da177e4
LT		 613 err = -ENOMEM;
614 goto done;
615 }
616
09fd0de5 617 hci_dev_lock(hdev);
1da177e4 618 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 619 hci_dev_unlock(hdev);
1da177e4
LT		 620
621 BT_DBG("num_rsp %d", ir.num_rsp);
622
623 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
624 ptr += sizeof(ir);
625 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 626 ir.num_rsp))
1da177e4 627 err = -EFAULT;
8e87d142 628 } else
1da177e4
LT		 629 err = -EFAULT;
630
631 kfree(buf);
632
633done:
634 hci_dev_put(hdev);
635 return err;
636}
637
638/* ---- HCI ioctl helpers ---- */
639
640int hci_dev_open(__u16 dev)
641{
642 struct hci_dev *hdev;
643 int ret = 0;
644
5a08ecce
AE		 645 hdev = hci_dev_get(dev);
646 if (!hdev)
1da177e4
LT		 647 return -ENODEV;
648
649 BT_DBG("%s %p", hdev->name, hdev);
650
651 hci_req_lock(hdev);
652
94324962
JH		 653 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
654 ret = -ENODEV;
655 goto done;
656 }
657
611b30f7
MH		 658 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
659 ret = -ERFKILL;
660 goto done;
661 }
662
1da177e4
LT		 663 if (test_bit(HCI_UP, &hdev->flags)) {
664 ret = -EALREADY;
665 goto done;
666 }
667
668 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
669 set_bit(HCI_RAW, &hdev->flags);
670
07e3b94a
AE		 671 /* Treat all non BR/EDR controllers as raw devices if
672 enable_hs is not set */
673 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 674 set_bit(HCI_RAW, &hdev->flags);
675
1da177e4
LT		 676 if (hdev->open(hdev)) {
677 ret = -EIO;
678 goto done;
679 }
680
681 if (!test_bit(HCI_RAW, &hdev->flags)) {
682 atomic_set(&hdev->cmd_cnt, 1);
683 set_bit(HCI_INIT, &hdev->flags);
a5040efa 684 hdev->init_last_cmd = 0;
1da177e4 685
5f246e89 686 ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT);
1da177e4 687
eead27da 688 if (lmp_host_le_capable(hdev))
6ed58ec5 689 ret = __hci_request(hdev, hci_le_init_req, 0,
5f246e89 690 HCI_INIT_TIMEOUT);
6ed58ec5 691
1da177e4
LT		 692 clear_bit(HCI_INIT, &hdev->flags);
693 }
694
695 if (!ret) {
696 hci_dev_hold(hdev);
697 set_bit(HCI_UP, &hdev->flags);
698 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 699 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 700 hci_dev_lock(hdev);
744cf19e 701 mgmt_powered(hdev, 1);
09fd0de5 702 hci_dev_unlock(hdev);
56e5cb86 703 }
8e87d142 704 } else {
1da177e4 705 /* Init failed, cleanup */
3eff45ea 706 flush_work(&hdev->tx_work);
c347b765 707 flush_work(&hdev->cmd_work);
b78752cc 708 flush_work(&hdev->rx_work);
1da177e4
LT		 709
710 skb_queue_purge(&hdev->cmd_q);
711 skb_queue_purge(&hdev->rx_q);
712
713 if (hdev->flush)
714 hdev->flush(hdev);
715
716 if (hdev->sent_cmd) {
717 kfree_skb(hdev->sent_cmd);
718 hdev->sent_cmd = NULL;
719 }
720
721 hdev->close(hdev);
722 hdev->flags = 0;
723 }
724
725done:
726 hci_req_unlock(hdev);
727 hci_dev_put(hdev);
728 return ret;
729}
730
731static int hci_dev_do_close(struct hci_dev *hdev)
732{
733 BT_DBG("%s %p", hdev->name, hdev);
734
28b75a89
AG		 735 cancel_work_sync(&hdev->le_scan);
736
1da177e4
LT		 737 hci_req_cancel(hdev, ENODEV);
738 hci_req_lock(hdev);
739
740 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 741 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 742 hci_req_unlock(hdev);
743 return 0;
744 }
745
3eff45ea
GP		 746 /* Flush RX and TX works */
747 flush_work(&hdev->tx_work);
b78752cc 748 flush_work(&hdev->rx_work);
1da177e4 749
16ab91ab 750 if (hdev->discov_timeout > 0) {
e0f9309f 751 cancel_delayed_work(&hdev->discov_off);
16ab91ab 752 hdev->discov_timeout = 0;
5e5282bb 753 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 754 }
755
a8b2d5c2 756 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 757 cancel_delayed_work(&hdev->service_cache);
758
7ba8b4be
AG		 759 cancel_delayed_work_sync(&hdev->le_scan_disable);
760
09fd0de5 761 hci_dev_lock(hdev);
1da177e4
LT		 762 inquiry_cache_flush(hdev);
763 hci_conn_hash_flush(hdev);
09fd0de5 764 hci_dev_unlock(hdev);
1da177e4
LT		 765
766 hci_notify(hdev, HCI_DEV_DOWN);
767
768 if (hdev->flush)
769 hdev->flush(hdev);
770
771 /* Reset device */
772 skb_queue_purge(&hdev->cmd_q);
773 atomic_set(&hdev->cmd_cnt, 1);
8af59467 774 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 775 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 776 set_bit(HCI_INIT, &hdev->flags);
5f246e89 777 __hci_request(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 778 clear_bit(HCI_INIT, &hdev->flags);
779 }
780
c347b765
GP		 781 /* flush cmd work */
782 flush_work(&hdev->cmd_work);
1da177e4
LT		 783
784 /* Drop queues */
785 skb_queue_purge(&hdev->rx_q);
786 skb_queue_purge(&hdev->cmd_q);
787 skb_queue_purge(&hdev->raw_q);
788
789 /* Drop last sent command */
790 if (hdev->sent_cmd) {
b79f44c1 791 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 792 kfree_skb(hdev->sent_cmd);
793 hdev->sent_cmd = NULL;
794 }
795
796 /* After this point our queues are empty
797 * and no tasks are scheduled. */
798 hdev->close(hdev);
799
8ee56540
MH		 800 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
801 hci_dev_lock(hdev);
802 mgmt_powered(hdev, 0);
803 hci_dev_unlock(hdev);
804 }
5add6af8 805
1da177e4
LT		 806 /* Clear flags */
807 hdev->flags = 0;
808
e59fda8d 809 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 810 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 811
1da177e4
LT		 812 hci_req_unlock(hdev);
813
814 hci_dev_put(hdev);
815 return 0;
816}
817
818int hci_dev_close(__u16 dev)
819{
820 struct hci_dev *hdev;
821 int err;
822
70f23020
AE		 823 hdev = hci_dev_get(dev);
824 if (!hdev)
1da177e4 825 return -ENODEV;
8ee56540
MH		 826
827 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
828 cancel_delayed_work(&hdev->power_off);
829
1da177e4 830 err = hci_dev_do_close(hdev);
8ee56540 831
1da177e4
LT		 832 hci_dev_put(hdev);
833 return err;
834}
835
836int hci_dev_reset(__u16 dev)
837{
838 struct hci_dev *hdev;
839 int ret = 0;
840
70f23020
AE		 841 hdev = hci_dev_get(dev);
842 if (!hdev)
1da177e4
LT		 843 return -ENODEV;
844
845 hci_req_lock(hdev);
1da177e4
LT		 846
847 if (!test_bit(HCI_UP, &hdev->flags))
848 goto done;
849
850 /* Drop queues */
851 skb_queue_purge(&hdev->rx_q);
852 skb_queue_purge(&hdev->cmd_q);
853
09fd0de5 854 hci_dev_lock(hdev);
1da177e4
LT		 855 inquiry_cache_flush(hdev);
856 hci_conn_hash_flush(hdev);
09fd0de5 857 hci_dev_unlock(hdev);
1da177e4
LT		 858
859 if (hdev->flush)
860 hdev->flush(hdev);
861
8e87d142 862 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 863 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 864
865 if (!test_bit(HCI_RAW, &hdev->flags))
5f246e89 866 ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 867
868done:
1da177e4
LT		 869 hci_req_unlock(hdev);
870 hci_dev_put(hdev);
871 return ret;
872}
873
874int hci_dev_reset_stat(__u16 dev)
875{
876 struct hci_dev *hdev;
877 int ret = 0;
878
70f23020
AE		 879 hdev = hci_dev_get(dev);
880 if (!hdev)
1da177e4
LT		 881 return -ENODEV;
882
883 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
884
885 hci_dev_put(hdev);
886
887 return ret;
888}
889
890int hci_dev_cmd(unsigned int cmd, void __user *arg)
891{
892 struct hci_dev *hdev;
893 struct hci_dev_req dr;
894 int err = 0;
895
896 if (copy_from_user(&dr, arg, sizeof(dr)))
897 return -EFAULT;
898
70f23020
AE		 899 hdev = hci_dev_get(dr.dev_id);
900 if (!hdev)
1da177e4
LT		 901 return -ENODEV;
902
903 switch (cmd) {
904 case HCISETAUTH:
04837f64 905 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
5f246e89 906 HCI_INIT_TIMEOUT);
1da177e4
LT		 907 break;
908
909 case HCISETENCRYPT:
910 if (!lmp_encrypt_capable(hdev)) {
911 err = -EOPNOTSUPP;
912 break;
913 }
914
915 if (!test_bit(HCI_AUTH, &hdev->flags)) {
916 /* Auth must be enabled first */
04837f64 917 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
5f246e89 918 HCI_INIT_TIMEOUT);
1da177e4
LT		 919 if (err)
920 break;
921 }
922
04837f64 923 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
5f246e89 924 HCI_INIT_TIMEOUT);
1da177e4
LT		 925 break;
926
927 case HCISETSCAN:
04837f64 928 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
5f246e89 929 HCI_INIT_TIMEOUT);
1da177e4
LT		 930 break;
931
1da177e4 932 case HCISETLINKPOL:
e4e8e37c 933 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
5f246e89 934 HCI_INIT_TIMEOUT);
1da177e4
LT		 935 break;
936
937 case HCISETLINKMODE:
e4e8e37c
MH		 938 hdev->link_mode = ((__u16) dr.dev_opt) &
939 (HCI_LM_MASTER | HCI_LM_ACCEPT);
940 break;
941
942 case HCISETPTYPE:
943 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 944 break;
945
946 case HCISETACLMTU:
e4e8e37c
MH		 947 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
948 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 949 break;
950
951 case HCISETSCOMTU:
e4e8e37c
MH		 952 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
953 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 954 break;
955
956 default:
957 err = -EINVAL;
958 break;
959 }
e4e8e37c 960
1da177e4
LT		 961 hci_dev_put(hdev);
962 return err;
963}
964
965int hci_get_dev_list(void __user *arg)
966{
8035ded4 967 struct hci_dev *hdev;
1da177e4
LT		 968 struct hci_dev_list_req *dl;
969 struct hci_dev_req *dr;
1da177e4
LT		 970 int n = 0, size, err;
971 __u16 dev_num;
972
973 if (get_user(dev_num, (__u16 __user *) arg))
974 return -EFAULT;
975
976 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
977 return -EINVAL;
978
979 size = sizeof(*dl) + dev_num * sizeof(*dr);
980
70f23020
AE		 981 dl = kzalloc(size, GFP_KERNEL);
982 if (!dl)
1da177e4
LT		 983 return -ENOMEM;
984
985 dr = dl->dev_req;
986
f20d09d5 987 read_lock(&hci_dev_list_lock);
8035ded4 988 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 989 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 990 cancel_delayed_work(&hdev->power_off);
c542a06c 991
a8b2d5c2
JH		 992 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
993 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 994
1da177e4
LT		 995 (dr + n)->dev_id = hdev->id;
996 (dr + n)->dev_opt = hdev->flags;
c542a06c 997
1da177e4
LT		 998 if (++n >= dev_num)
999 break;
1000 }
f20d09d5 1001 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1002
1003 dl->dev_num = n;
1004 size = sizeof(*dl) + n * sizeof(*dr);
1005
1006 err = copy_to_user(arg, dl, size);
1007 kfree(dl);
1008
1009 return err ? -EFAULT : 0;
1010}
1011
1012int hci_get_dev_info(void __user *arg)
1013{
1014 struct hci_dev *hdev;
1015 struct hci_dev_info di;
1016 int err = 0;
1017
1018 if (copy_from_user(&di, arg, sizeof(di)))
1019 return -EFAULT;
1020
70f23020
AE		 1021 hdev = hci_dev_get(di.dev_id);
1022 if (!hdev)
1da177e4
LT		 1023 return -ENODEV;
1024
a8b2d5c2 1025 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1026 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1027
a8b2d5c2
JH		 1028 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1029 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1030
1da177e4
LT		 1031 strcpy(di.name, hdev->name);
1032 di.bdaddr = hdev->bdaddr;
943da25d 1033 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1034 di.flags = hdev->flags;
1035 di.pkt_type = hdev->pkt_type;
1036 di.acl_mtu = hdev->acl_mtu;
1037 di.acl_pkts = hdev->acl_pkts;
1038 di.sco_mtu = hdev->sco_mtu;
1039 di.sco_pkts = hdev->sco_pkts;
1040 di.link_policy = hdev->link_policy;
1041 di.link_mode = hdev->link_mode;
1042
1043 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1044 memcpy(&di.features, &hdev->features, sizeof(di.features));
1045
1046 if (copy_to_user(arg, &di, sizeof(di)))
1047 err = -EFAULT;
1048
1049 hci_dev_put(hdev);
1050
1051 return err;
1052}
1053
1054/* ---- Interface to HCI drivers ---- */
1055
611b30f7
MH		 1056static int hci_rfkill_set_block(void *data, bool blocked)
1057{
1058 struct hci_dev *hdev = data;
1059
1060 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1061
1062 if (!blocked)
1063 return 0;
1064
1065 hci_dev_do_close(hdev);
1066
1067 return 0;
1068}
1069
1070static const struct rfkill_ops hci_rfkill_ops = {
1071 .set_block = hci_rfkill_set_block,
1072};
1073
ab81cbf9
JH		 1074static void hci_power_on(struct work_struct *work)
1075{
1076 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1077
1078 BT_DBG("%s", hdev->name);
1079
1080 if (hci_dev_open(hdev->id) < 0)
1081 return;
1082
a8b2d5c2 1083 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
9345d40c 1084 schedule_delayed_work(&hdev->power_off, HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1085
a8b2d5c2 1086 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1087 mgmt_index_added(hdev);
ab81cbf9
JH		 1088}
1089
1090static void hci_power_off(struct work_struct *work)
1091{
3243553f 1092 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1093 power_off.work);
ab81cbf9
JH		 1094
1095 BT_DBG("%s", hdev->name);
1096
8ee56540 1097 hci_dev_do_close(hdev);
ab81cbf9
JH		 1098}
1099
16ab91ab
JH		 1100static void hci_discov_off(struct work_struct *work)
1101{
1102 struct hci_dev *hdev;
1103 u8 scan = SCAN_PAGE;
1104
1105 hdev = container_of(work, struct hci_dev, discov_off.work);
1106
1107 BT_DBG("%s", hdev->name);
1108
09fd0de5 1109 hci_dev_lock(hdev);
16ab91ab
JH		 1110
1111 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1112
1113 hdev->discov_timeout = 0;
1114
09fd0de5 1115 hci_dev_unlock(hdev);
16ab91ab
JH		 1116}
1117
2aeb9a1a
JH		 1118int hci_uuids_clear(struct hci_dev *hdev)
1119{
1120 struct list_head *p, *n;
1121
1122 list_for_each_safe(p, n, &hdev->uuids) {
1123 struct bt_uuid *uuid;
1124
1125 uuid = list_entry(p, struct bt_uuid, list);
1126
1127 list_del(p);
1128 kfree(uuid);
1129 }
1130
1131 return 0;
1132}
1133
55ed8ca1
JH		 1134int hci_link_keys_clear(struct hci_dev *hdev)
1135{
1136 struct list_head *p, *n;
1137
1138 list_for_each_safe(p, n, &hdev->link_keys) {
1139 struct link_key *key;
1140
1141 key = list_entry(p, struct link_key, list);
1142
1143 list_del(p);
1144 kfree(key);
1145 }
1146
1147 return 0;
1148}
1149
b899efaf
VCG		 1150int hci_smp_ltks_clear(struct hci_dev *hdev)
1151{
1152 struct smp_ltk *k, *tmp;
1153
1154 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1155 list_del(&k->list);
1156 kfree(k);
1157 }
1158
1159 return 0;
1160}
1161
55ed8ca1
JH		 1162struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1163{
8035ded4 1164 struct link_key *k;
55ed8ca1 1165
8035ded4 1166 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1167 if (bacmp(bdaddr, &k->bdaddr) == 0)
1168 return k;
55ed8ca1
JH		 1169
1170 return NULL;
1171}
1172
745c0ce3 1173static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1174 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1175{
1176 /* Legacy key */
1177 if (key_type < 0x03)
745c0ce3 1178 return true;
d25e28ab
JH		 1179
1180 /* Debug keys are insecure so don't store them persistently */
1181 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1182 return false;
d25e28ab
JH		 1183
1184 /* Changed combination key and there's no previous one */
1185 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1186 return false;
d25e28ab
JH		 1187
1188 /* Security mode 3 case */
1189 if (!conn)
745c0ce3 1190 return true;
d25e28ab
JH		 1191
1192 /* Neither local nor remote side had no-bonding as requirement */
1193 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1194 return true;
d25e28ab
JH		 1195
1196 /* Local side had dedicated bonding as requirement */
1197 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1198 return true;
d25e28ab
JH		 1199
1200 /* Remote side had dedicated bonding as requirement */
1201 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1202 return true;
d25e28ab
JH		 1203
1204 /* If none of the above criteria match, then don't store the key
1205 * persistently */
745c0ce3 1206 return false;
d25e28ab
JH		 1207}
1208
c9839a11 1209struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1210{
c9839a11 1211 struct smp_ltk *k;
75d262c2 1212
c9839a11
VCG		 1213 list_for_each_entry(k, &hdev->long_term_keys, list) {
1214 if (k->ediv != ediv ||
a8c5fb1a 1215 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1216 continue;
1217
c9839a11 1218 return k;
75d262c2
VCG		 1219 }
1220
1221 return NULL;
1222}
75d262c2 1223
c9839a11 1224struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1225 u8 addr_type)
75d262c2 1226{
c9839a11 1227 struct smp_ltk *k;
75d262c2 1228
c9839a11
VCG		 1229 list_for_each_entry(k, &hdev->long_term_keys, list)
1230 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1231 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1232 return k;
1233
1234 return NULL;
1235}
75d262c2 1236
d25e28ab 1237int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1238 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1239{
1240 struct link_key *key, *old_key;
745c0ce3
VA		 1241 u8 old_key_type;
1242 bool persistent;
55ed8ca1
JH		 1243
1244 old_key = hci_find_link_key(hdev, bdaddr);
1245 if (old_key) {
1246 old_key_type = old_key->type;
1247 key = old_key;
1248 } else {
12adcf3a 1249 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1250 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1251 if (!key)
1252 return -ENOMEM;
1253 list_add(&key->list, &hdev->link_keys);
1254 }
1255
1256 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1257
d25e28ab
JH		 1258 /* Some buggy controller combinations generate a changed
1259 * combination key for legacy pairing even when there's no
1260 * previous key */
1261 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1262 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1263 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1264 if (conn)
1265 conn->key_type = type;
1266 }
d25e28ab 1267
55ed8ca1 1268 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1269 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1270 key->pin_len = pin_len;
1271
b6020ba0 1272 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1273 key->type = old_key_type;
4748fed2
JH		 1274 else
1275 key->type = type;
1276
4df378a1
JH		 1277 if (!new_key)
1278 return 0;
1279
1280 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1281
744cf19e 1282 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1283
6ec5bcad
VA		 1284 if (conn)
1285 conn->flush_key = !persistent;
55ed8ca1
JH		 1286
1287 return 0;
1288}
1289
c9839a11 1290int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1291 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1292 ediv, u8 rand[8])
75d262c2 1293{
c9839a11 1294 struct smp_ltk *key, *old_key;
75d262c2 1295
c9839a11
VCG		 1296 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1297 return 0;
75d262c2 1298
c9839a11
VCG		 1299 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1300 if (old_key)
75d262c2 1301 key = old_key;
c9839a11
VCG		 1302 else {
1303 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1304 if (!key)
1305 return -ENOMEM;
c9839a11 1306 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1307 }
1308
75d262c2 1309 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1310 key->bdaddr_type = addr_type;
1311 memcpy(key->val, tk, sizeof(key->val));
1312 key->authenticated = authenticated;
1313 key->ediv = ediv;
1314 key->enc_size = enc_size;
1315 key->type = type;
1316 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1317
c9839a11
VCG		 1318 if (!new_key)
1319 return 0;
75d262c2 1320
261cc5aa
VCG		 1321 if (type & HCI_SMP_LTK)
1322 mgmt_new_ltk(hdev, key, 1);
1323
75d262c2
VCG		 1324 return 0;
1325}
1326
55ed8ca1
JH		 1327int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1328{
1329 struct link_key *key;
1330
1331 key = hci_find_link_key(hdev, bdaddr);
1332 if (!key)
1333 return -ENOENT;
1334
1335 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1336
1337 list_del(&key->list);
1338 kfree(key);
1339
1340 return 0;
1341}
1342
b899efaf
VCG		 1343int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1344{
1345 struct smp_ltk *k, *tmp;
1346
1347 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1348 if (bacmp(bdaddr, &k->bdaddr))
1349 continue;
1350
1351 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1352
1353 list_del(&k->list);
1354 kfree(k);
1355 }
1356
1357 return 0;
1358}
1359
6bd32326 1360/* HCI command timer function */
bda4f23a 1361static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1362{
1363 struct hci_dev *hdev = (void *) arg;
1364
bda4f23a
AE		 1365 if (hdev->sent_cmd) {
1366 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1367 u16 opcode = __le16_to_cpu(sent->opcode);
1368
1369 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1370 } else {
1371 BT_ERR("%s command tx timeout", hdev->name);
1372 }
1373
6bd32326 1374 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1375 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1376}
1377
2763eda6 1378struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1379 bdaddr_t *bdaddr)
2763eda6
SJ		 1380{
1381 struct oob_data *data;
1382
1383 list_for_each_entry(data, &hdev->remote_oob_data, list)
1384 if (bacmp(bdaddr, &data->bdaddr) == 0)
1385 return data;
1386
1387 return NULL;
1388}
1389
1390int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1391{
1392 struct oob_data *data;
1393
1394 data = hci_find_remote_oob_data(hdev, bdaddr);
1395 if (!data)
1396 return -ENOENT;
1397
1398 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1399
1400 list_del(&data->list);
1401 kfree(data);
1402
1403 return 0;
1404}
1405
1406int hci_remote_oob_data_clear(struct hci_dev *hdev)
1407{
1408 struct oob_data *data, *n;
1409
1410 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1411 list_del(&data->list);
1412 kfree(data);
1413 }
1414
1415 return 0;
1416}
1417
1418int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1419 u8 *randomizer)
2763eda6
SJ		 1420{
1421 struct oob_data *data;
1422
1423 data = hci_find_remote_oob_data(hdev, bdaddr);
1424
1425 if (!data) {
1426 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1427 if (!data)
1428 return -ENOMEM;
1429
1430 bacpy(&data->bdaddr, bdaddr);
1431 list_add(&data->list, &hdev->remote_oob_data);
1432 }
1433
1434 memcpy(data->hash, hash, sizeof(data->hash));
1435 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1436
1437 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1438
1439 return 0;
1440}
1441
04124681 1442struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1443{
8035ded4 1444 struct bdaddr_list *b;
b2a66aad 1445
8035ded4 1446 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1447 if (bacmp(bdaddr, &b->bdaddr) == 0)
1448 return b;
b2a66aad
AJ		 1449
1450 return NULL;
1451}
1452
1453int hci_blacklist_clear(struct hci_dev *hdev)
1454{
1455 struct list_head *p, *n;
1456
1457 list_for_each_safe(p, n, &hdev->blacklist) {
1458 struct bdaddr_list *b;
1459
1460 b = list_entry(p, struct bdaddr_list, list);
1461
1462 list_del(p);
1463 kfree(b);
1464 }
1465
1466 return 0;
1467}
1468
88c1fe4b 1469int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1470{
1471 struct bdaddr_list *entry;
b2a66aad
AJ		 1472
1473 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1474 return -EBADF;
1475
5e762444
AJ		 1476 if (hci_blacklist_lookup(hdev, bdaddr))
1477 return -EEXIST;
b2a66aad
AJ		 1478
1479 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1480 if (!entry)
1481 return -ENOMEM;
b2a66aad
AJ		 1482
1483 bacpy(&entry->bdaddr, bdaddr);
1484
1485 list_add(&entry->list, &hdev->blacklist);
1486
88c1fe4b 1487 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1488}
1489
88c1fe4b 1490int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1491{
1492 struct bdaddr_list *entry;
b2a66aad 1493
1ec918ce 1494 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1495 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1496
1497 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1498 if (!entry)
5e762444 1499 return -ENOENT;
b2a66aad
AJ		 1500
1501 list_del(&entry->list);
1502 kfree(entry);
1503
88c1fe4b 1504 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1505}
1506
7ba8b4be
AG		 1507static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1508{
1509 struct le_scan_params *param = (struct le_scan_params *) opt;
1510 struct hci_cp_le_set_scan_param cp;
1511
1512 memset(&cp, 0, sizeof(cp));
1513 cp.type = param->type;
1514 cp.interval = cpu_to_le16(param->interval);
1515 cp.window = cpu_to_le16(param->window);
1516
1517 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1518}
1519
1520static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1521{
1522 struct hci_cp_le_set_scan_enable cp;
1523
1524 memset(&cp, 0, sizeof(cp));
1525 cp.enable = 1;
0431a43c 1526 cp.filter_dup = 1;
7ba8b4be
AG		 1527
1528 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1529}
1530
1531static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1532 u16 window, int timeout)
7ba8b4be
AG		 1533{
1534 long timeo = msecs_to_jiffies(3000);
1535 struct le_scan_params param;
1536 int err;
1537
1538 BT_DBG("%s", hdev->name);
1539
1540 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1541 return -EINPROGRESS;
1542
1543 param.type = type;
1544 param.interval = interval;
1545 param.window = window;
1546
1547 hci_req_lock(hdev);
1548
1549 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1550 timeo);
7ba8b4be
AG		 1551 if (!err)
1552 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1553
1554 hci_req_unlock(hdev);
1555
1556 if (err < 0)
1557 return err;
1558
1559 schedule_delayed_work(&hdev->le_scan_disable,
04124681 1560 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1561
1562 return 0;
1563}
1564
7dbfac1d
AG		 1565int hci_cancel_le_scan(struct hci_dev *hdev)
1566{
1567 BT_DBG("%s", hdev->name);
1568
1569 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1570 return -EALREADY;
1571
1572 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1573 struct hci_cp_le_set_scan_enable cp;
1574
1575 /* Send HCI command to disable LE Scan */
1576 memset(&cp, 0, sizeof(cp));
1577 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1578 }
1579
1580 return 0;
1581}
1582
7ba8b4be
AG		 1583static void le_scan_disable_work(struct work_struct *work)
1584{
1585 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1586 le_scan_disable.work);
7ba8b4be
AG		 1587 struct hci_cp_le_set_scan_enable cp;
1588
1589 BT_DBG("%s", hdev->name);
1590
1591 memset(&cp, 0, sizeof(cp));
1592
1593 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1594}
1595
28b75a89
AG		 1596static void le_scan_work(struct work_struct *work)
1597{
1598 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1599 struct le_scan_params *param = &hdev->le_scan_params;
1600
1601 BT_DBG("%s", hdev->name);
1602
04124681
GP		 1603 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1604 param->timeout);
28b75a89
AG		 1605}
1606
1607int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1608 int timeout)
28b75a89
AG		 1609{
1610 struct le_scan_params *param = &hdev->le_scan_params;
1611
1612 BT_DBG("%s", hdev->name);
1613
1614 if (work_busy(&hdev->le_scan))
1615 return -EINPROGRESS;
1616
1617 param->type = type;
1618 param->interval = interval;
1619 param->window = window;
1620 param->timeout = timeout;
1621
1622 queue_work(system_long_wq, &hdev->le_scan);
1623
1624 return 0;
1625}
1626
9be0dab7
DH		 1627/* Alloc HCI device */
1628struct hci_dev *hci_alloc_dev(void)
1629{
1630 struct hci_dev *hdev;
1631
1632 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1633 if (!hdev)
1634 return NULL;
1635
b1b813d4
DH		 1636 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1637 hdev->esco_type = (ESCO_HV1);
1638 hdev->link_mode = (HCI_LM_ACCEPT);
1639 hdev->io_capability = 0x03; /* No Input No Output */
1640
b1b813d4
DH		 1641 hdev->sniff_max_interval = 800;
1642 hdev->sniff_min_interval = 80;
1643
1644 mutex_init(&hdev->lock);
1645 mutex_init(&hdev->req_lock);
1646
1647 INIT_LIST_HEAD(&hdev->mgmt_pending);
1648 INIT_LIST_HEAD(&hdev->blacklist);
1649 INIT_LIST_HEAD(&hdev->uuids);
1650 INIT_LIST_HEAD(&hdev->link_keys);
1651 INIT_LIST_HEAD(&hdev->long_term_keys);
1652 INIT_LIST_HEAD(&hdev->remote_oob_data);
b1b813d4
DH		 1653
1654 INIT_WORK(&hdev->rx_work, hci_rx_work);
1655 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1656 INIT_WORK(&hdev->tx_work, hci_tx_work);
1657 INIT_WORK(&hdev->power_on, hci_power_on);
1658 INIT_WORK(&hdev->le_scan, le_scan_work);
1659
b1b813d4
DH		 1660 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1661 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1662 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1663
9be0dab7 1664 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 1665 skb_queue_head_init(&hdev->rx_q);
1666 skb_queue_head_init(&hdev->cmd_q);
1667 skb_queue_head_init(&hdev->raw_q);
1668
1669 init_waitqueue_head(&hdev->req_wait_q);
1670
bda4f23a 1671 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 1672
b1b813d4
DH		 1673 hci_init_sysfs(hdev);
1674 discovery_init(hdev);
1675 hci_conn_hash_init(hdev);
9be0dab7
DH		 1676
1677 return hdev;
1678}
1679EXPORT_SYMBOL(hci_alloc_dev);
1680
1681/* Free HCI device */
1682void hci_free_dev(struct hci_dev *hdev)
1683{
1684 skb_queue_purge(&hdev->driver_init);
1685
1686 /* will free via device release */
1687 put_device(&hdev->dev);
1688}
1689EXPORT_SYMBOL(hci_free_dev);
1690
1da177e4
LT		 1691/* Register HCI device */
1692int hci_register_dev(struct hci_dev *hdev)
1693{
b1b813d4 1694 int id, error;
1da177e4 1695
010666a1 1696 if (!hdev->open || !hdev->close)
1da177e4
LT		 1697 return -EINVAL;
1698
08add513
MM		 1699 /* Do not allow HCI_AMP devices to register at index 0,
1700 * so the index can be used as the AMP controller ID.
1701 */
3df92b31
SL		 1702 switch (hdev->dev_type) {
1703 case HCI_BREDR:
1704 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
1705 break;
1706 case HCI_AMP:
1707 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
1708 break;
1709 default:
1710 return -EINVAL;
1da177e4 1711 }
8e87d142 1712
3df92b31
SL		 1713 if (id < 0)
1714 return id;
1715
1da177e4
LT		 1716 sprintf(hdev->name, "hci%d", id);
1717 hdev->id = id;
2d8b3a11
AE		 1718
1719 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1720
3df92b31
SL		 1721 write_lock(&hci_dev_list_lock);
1722 list_add(&hdev->list, &hci_dev_list);
f20d09d5 1723 write_unlock(&hci_dev_list_lock);
1da177e4 1724
32845eb1 1725 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 1726 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1727 if (!hdev->workqueue) {
1728 error = -ENOMEM;
1729 goto err;
1730 }
f48fd9c8 1731
33ca954d
DH		 1732 error = hci_add_sysfs(hdev);
1733 if (error < 0)
1734 goto err_wqueue;
1da177e4 1735
611b30f7 1736 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 1737 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1738 hdev);
611b30f7
MH		 1739 if (hdev->rfkill) {
1740 if (rfkill_register(hdev->rfkill) < 0) {
1741 rfkill_destroy(hdev->rfkill);
1742 hdev->rfkill = NULL;
1743 }
1744 }
1745
a8b2d5c2 1746 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 1747
1748 if (hdev->dev_type != HCI_AMP)
1749 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1750
7f971041 1751 schedule_work(&hdev->power_on);
ab81cbf9 1752
1da177e4 1753 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1754 hci_dev_hold(hdev);
1da177e4
LT		 1755
1756 return id;
f48fd9c8 1757
33ca954d
DH		 1758err_wqueue:
1759 destroy_workqueue(hdev->workqueue);
1760err:
3df92b31 1761 ida_simple_remove(&hci_index_ida, hdev->id);
f20d09d5 1762 write_lock(&hci_dev_list_lock);
f48fd9c8 1763 list_del(&hdev->list);
f20d09d5 1764 write_unlock(&hci_dev_list_lock);
f48fd9c8 1765
33ca954d 1766 return error;
1da177e4
LT		 1767}
1768EXPORT_SYMBOL(hci_register_dev);
1769
1770/* Unregister HCI device */
59735631 1771void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1772{
3df92b31 1773 int i, id;
ef222013 1774
c13854ce 1775 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1776
94324962
JH		 1777 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1778
3df92b31
SL		 1779 id = hdev->id;
1780
f20d09d5 1781 write_lock(&hci_dev_list_lock);
1da177e4 1782 list_del(&hdev->list);
f20d09d5 1783 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1784
1785 hci_dev_do_close(hdev);
1786
cd4c5391 1787 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1788 kfree_skb(hdev->reassembly[i]);
1789
ab81cbf9 1790 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 1791 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1792 hci_dev_lock(hdev);
744cf19e 1793 mgmt_index_removed(hdev);
09fd0de5 1794 hci_dev_unlock(hdev);
56e5cb86 1795 }
ab81cbf9 1796
2e58ef3e
JH		 1797 /* mgmt_index_removed should take care of emptying the
1798 * pending list */
1799 BUG_ON(!list_empty(&hdev->mgmt_pending));
1800
1da177e4
LT		 1801 hci_notify(hdev, HCI_DEV_UNREG);
1802
611b30f7
MH		 1803 if (hdev->rfkill) {
1804 rfkill_unregister(hdev->rfkill);
1805 rfkill_destroy(hdev->rfkill);
1806 }
1807
ce242970 1808 hci_del_sysfs(hdev);
147e2d59 1809
f48fd9c8
MH		 1810 destroy_workqueue(hdev->workqueue);
1811
09fd0de5 1812 hci_dev_lock(hdev);
e2e0cacb 1813 hci_blacklist_clear(hdev);
2aeb9a1a 1814 hci_uuids_clear(hdev);
55ed8ca1 1815 hci_link_keys_clear(hdev);
b899efaf 1816 hci_smp_ltks_clear(hdev);
2763eda6 1817 hci_remote_oob_data_clear(hdev);
09fd0de5 1818 hci_dev_unlock(hdev);
e2e0cacb 1819
dc946bd8 1820 hci_dev_put(hdev);
3df92b31
SL		 1821
1822 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 1823}
1824EXPORT_SYMBOL(hci_unregister_dev);
1825
1826/* Suspend HCI device */
1827int hci_suspend_dev(struct hci_dev *hdev)
1828{
1829 hci_notify(hdev, HCI_DEV_SUSPEND);
1830 return 0;
1831}
1832EXPORT_SYMBOL(hci_suspend_dev);
1833
1834/* Resume HCI device */
1835int hci_resume_dev(struct hci_dev *hdev)
1836{
1837 hci_notify(hdev, HCI_DEV_RESUME);
1838 return 0;
1839}
1840EXPORT_SYMBOL(hci_resume_dev);
1841
76bca880
MH		 1842/* Receive frame from HCI drivers */
1843int hci_recv_frame(struct sk_buff *skb)
1844{
1845 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1846 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 1847 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 1848 kfree_skb(skb);
1849 return -ENXIO;
1850 }
1851
1852 /* Incomming skb */
1853 bt_cb(skb)->incoming = 1;
1854
1855 /* Time stamp */
1856 __net_timestamp(skb);
1857
76bca880 1858 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1859 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1860
76bca880
MH		 1861 return 0;
1862}
1863EXPORT_SYMBOL(hci_recv_frame);
1864
33e882a5 1865static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 1866 int count, __u8 index)
33e882a5
SS		 1867{
1868 int len = 0;
1869 int hlen = 0;
1870 int remain = count;
1871 struct sk_buff *skb;
1872 struct bt_skb_cb *scb;
1873
1874 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 1875 index >= NUM_REASSEMBLY)
33e882a5
SS		 1876 return -EILSEQ;
1877
1878 skb = hdev->reassembly[index];
1879
1880 if (!skb) {
1881 switch (type) {
1882 case HCI_ACLDATA_PKT:
1883 len = HCI_MAX_FRAME_SIZE;
1884 hlen = HCI_ACL_HDR_SIZE;
1885 break;
1886 case HCI_EVENT_PKT:
1887 len = HCI_MAX_EVENT_SIZE;
1888 hlen = HCI_EVENT_HDR_SIZE;
1889 break;
1890 case HCI_SCODATA_PKT:
1891 len = HCI_MAX_SCO_SIZE;
1892 hlen = HCI_SCO_HDR_SIZE;
1893 break;
1894 }
1895
1e429f38 1896 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1897 if (!skb)
1898 return -ENOMEM;
1899
1900 scb = (void *) skb->cb;
1901 scb->expect = hlen;
1902 scb->pkt_type = type;
1903
1904 skb->dev = (void *) hdev;
1905 hdev->reassembly[index] = skb;
1906 }
1907
1908 while (count) {
1909 scb = (void *) skb->cb;
89bb46d0 1910 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1911
1912 memcpy(skb_put(skb, len), data, len);
1913
1914 count -= len;
1915 data += len;
1916 scb->expect -= len;
1917 remain = count;
1918
1919 switch (type) {
1920 case HCI_EVENT_PKT:
1921 if (skb->len == HCI_EVENT_HDR_SIZE) {
1922 struct hci_event_hdr *h = hci_event_hdr(skb);
1923 scb->expect = h->plen;
1924
1925 if (skb_tailroom(skb) < scb->expect) {
1926 kfree_skb(skb);
1927 hdev->reassembly[index] = NULL;
1928 return -ENOMEM;
1929 }
1930 }
1931 break;
1932
1933 case HCI_ACLDATA_PKT:
1934 if (skb->len == HCI_ACL_HDR_SIZE) {
1935 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1936 scb->expect = __le16_to_cpu(h->dlen);
1937
1938 if (skb_tailroom(skb) < scb->expect) {
1939 kfree_skb(skb);
1940 hdev->reassembly[index] = NULL;
1941 return -ENOMEM;
1942 }
1943 }
1944 break;
1945
1946 case HCI_SCODATA_PKT:
1947 if (skb->len == HCI_SCO_HDR_SIZE) {
1948 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1949 scb->expect = h->dlen;
1950
1951 if (skb_tailroom(skb) < scb->expect) {
1952 kfree_skb(skb);
1953 hdev->reassembly[index] = NULL;
1954 return -ENOMEM;
1955 }
1956 }
1957 break;
1958 }
1959
1960 if (scb->expect == 0) {
1961 /* Complete frame */
1962
1963 bt_cb(skb)->pkt_type = type;
1964 hci_recv_frame(skb);
1965
1966 hdev->reassembly[index] = NULL;
1967 return remain;
1968 }
1969 }
1970
1971 return remain;
1972}
1973
ef222013
MH		 1974int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1975{
f39a3c06
SS		 1976 int rem = 0;
1977
ef222013
MH		 1978 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1979 return -EILSEQ;
1980
da5f6c37 1981 while (count) {
1e429f38 1982 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1983 if (rem < 0)
1984 return rem;
ef222013 1985
f39a3c06
SS		 1986 data += (count - rem);
1987 count = rem;
f81c6224 1988 }
ef222013 1989
f39a3c06 1990 return rem;
ef222013
MH		 1991}
1992EXPORT_SYMBOL(hci_recv_fragment);
1993
99811510
SS		 1994#define STREAM_REASSEMBLY 0
1995
1996int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1997{
1998 int type;
1999 int rem = 0;
2000
da5f6c37 2001 while (count) {
99811510
SS		 2002 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2003
2004 if (!skb) {
2005 struct { char type; } *pkt;
2006
2007 /* Start of the frame */
2008 pkt = data;
2009 type = pkt->type;
2010
2011 data++;
2012 count--;
2013 } else
2014 type = bt_cb(skb)->pkt_type;
2015
1e429f38 2016 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2017 STREAM_REASSEMBLY);
99811510
SS		 2018 if (rem < 0)
2019 return rem;
2020
2021 data += (count - rem);
2022 count = rem;
f81c6224 2023 }
99811510
SS		 2024
2025 return rem;
2026}
2027EXPORT_SYMBOL(hci_recv_stream_fragment);
2028
1da177e4
LT		 2029/* ---- Interface to upper protocols ---- */
2030
1da177e4
LT		 2031int hci_register_cb(struct hci_cb *cb)
2032{
2033 BT_DBG("%p name %s", cb, cb->name);
2034
f20d09d5 2035 write_lock(&hci_cb_list_lock);
1da177e4 2036 list_add(&cb->list, &hci_cb_list);
f20d09d5 2037 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2038
2039 return 0;
2040}
2041EXPORT_SYMBOL(hci_register_cb);
2042
2043int hci_unregister_cb(struct hci_cb *cb)
2044{
2045 BT_DBG("%p name %s", cb, cb->name);
2046
f20d09d5 2047 write_lock(&hci_cb_list_lock);
1da177e4 2048 list_del(&cb->list);
f20d09d5 2049 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2050
2051 return 0;
2052}
2053EXPORT_SYMBOL(hci_unregister_cb);
2054
2055static int hci_send_frame(struct sk_buff *skb)
2056{
2057 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2058
2059 if (!hdev) {
2060 kfree_skb(skb);
2061 return -ENODEV;
2062 }
2063
0d48d939 2064 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2065
cd82e61c
MH		 2066 /* Time stamp */
2067 __net_timestamp(skb);
1da177e4 2068
cd82e61c
MH		 2069 /* Send copy to monitor */
2070 hci_send_to_monitor(hdev, skb);
2071
2072 if (atomic_read(&hdev->promisc)) {
2073 /* Send copy to the sockets */
470fe1b5 2074 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2075 }
2076
2077 /* Get rid of skb owner, prior to sending to the driver. */
2078 skb_orphan(skb);
2079
2080 return hdev->send(skb);
2081}
2082
2083/* Send HCI command */
a9de9248 2084int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2085{
2086 int len = HCI_COMMAND_HDR_SIZE + plen;
2087 struct hci_command_hdr *hdr;
2088 struct sk_buff *skb;
2089
f0e09510 2090 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2091
2092 skb = bt_skb_alloc(len, GFP_ATOMIC);
2093 if (!skb) {
ef222013 2094 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2095 return -ENOMEM;
2096 }
2097
2098 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2099 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2100 hdr->plen = plen;
2101
2102 if (plen)
2103 memcpy(skb_put(skb, plen), param, plen);
2104
2105 BT_DBG("skb len %d", skb->len);
2106
0d48d939 2107 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2108 skb->dev = (void *) hdev;
c78ae283 2109
a5040efa
JH		 2110 if (test_bit(HCI_INIT, &hdev->flags))
2111 hdev->init_last_cmd = opcode;
2112
1da177e4 2113 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2114 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2115
2116 return 0;
2117}
1da177e4
LT		 2118
2119/* Get data from the previously sent command */
a9de9248 2120void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2121{
2122 struct hci_command_hdr *hdr;
2123
2124 if (!hdev->sent_cmd)
2125 return NULL;
2126
2127 hdr = (void *) hdev->sent_cmd->data;
2128
a9de9248 2129 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2130 return NULL;
2131
f0e09510 2132 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2133
2134 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2135}
2136
2137/* Send ACL data */
2138static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2139{
2140 struct hci_acl_hdr *hdr;
2141 int len = skb->len;
2142
badff6d0
ACM		 2143 skb_push(skb, HCI_ACL_HDR_SIZE);
2144 skb_reset_transport_header(skb);
9c70220b 2145 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2146 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2147 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2148}
2149
73d80deb 2150static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
a8c5fb1a 2151 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2152{
2153 struct hci_dev *hdev = conn->hdev;
2154 struct sk_buff *list;
2155
087bfd99
GP		 2156 skb->len = skb_headlen(skb);
2157 skb->data_len = 0;
2158
2159 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2160 hci_add_acl_hdr(skb, conn->handle, flags);
2161
70f23020
AE		 2162 list = skb_shinfo(skb)->frag_list;
2163 if (!list) {
1da177e4
LT		 2164 /* Non fragmented */
2165 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2166
73d80deb 2167 skb_queue_tail(queue, skb);
1da177e4
LT		 2168 } else {
2169 /* Fragmented */
2170 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2171
2172 skb_shinfo(skb)->frag_list = NULL;
2173
2174 /* Queue all fragments atomically */
af3e6359 2175 spin_lock(&queue->lock);
1da177e4 2176
73d80deb 2177 __skb_queue_tail(queue, skb);
e702112f
AE		 2178
2179 flags &= ~ACL_START;
2180 flags |= ACL_CONT;
1da177e4
LT		 2181 do {
2182 skb = list; list = list->next;
8e87d142 2183
1da177e4 2184 skb->dev = (void *) hdev;
0d48d939 2185 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2186 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2187
2188 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2189
73d80deb 2190 __skb_queue_tail(queue, skb);
1da177e4
LT		 2191 } while (list);
2192
af3e6359 2193 spin_unlock(&queue->lock);
1da177e4 2194 }
73d80deb
LAD		 2195}
2196
2197void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2198{
2199 struct hci_conn *conn = chan->conn;
2200 struct hci_dev *hdev = conn->hdev;
2201
f0e09510 2202 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2203
2204 skb->dev = (void *) hdev;
73d80deb
LAD		 2205
2206 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2207
3eff45ea 2208 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2209}
1da177e4
LT		 2210
2211/* Send SCO data */
0d861d8b 2212void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2213{
2214 struct hci_dev *hdev = conn->hdev;
2215 struct hci_sco_hdr hdr;
2216
2217 BT_DBG("%s len %d", hdev->name, skb->len);
2218
aca3192c 2219 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2220 hdr.dlen = skb->len;
2221
badff6d0
ACM		 2222 skb_push(skb, HCI_SCO_HDR_SIZE);
2223 skb_reset_transport_header(skb);
9c70220b 2224 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2225
2226 skb->dev = (void *) hdev;
0d48d939 2227 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2228
1da177e4 2229 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2230 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2231}
1da177e4
LT		 2232
2233/* ---- HCI TX task (outgoing data) ---- */
2234
2235/* HCI Connection scheduler */
6039aa73
GP		 2236static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2237 int *quote)
1da177e4
LT		 2238{
2239 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2240 struct hci_conn *conn = NULL, *c;
abc5de8f 2241 unsigned int num = 0, min = ~0;
1da177e4 2242
8e87d142 2243 /* We don't have to lock device here. Connections are always
1da177e4 2244 * added and removed with TX task disabled. */
bf4c6325
GP		 2245
2246 rcu_read_lock();
2247
2248 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2249 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2250 continue;
769be974
MH		 2251
2252 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2253 continue;
2254
1da177e4
LT		 2255 num++;
2256
2257 if (c->sent < min) {
2258 min = c->sent;
2259 conn = c;
2260 }
52087a79
LAD		 2261
2262 if (hci_conn_num(hdev, type) == num)
2263 break;
1da177e4
LT		 2264 }
2265
bf4c6325
GP		 2266 rcu_read_unlock();
2267
1da177e4 2268 if (conn) {
6ed58ec5
VT		 2269 int cnt, q;
2270
2271 switch (conn->type) {
2272 case ACL_LINK:
2273 cnt = hdev->acl_cnt;
2274 break;
2275 case SCO_LINK:
2276 case ESCO_LINK:
2277 cnt = hdev->sco_cnt;
2278 break;
2279 case LE_LINK:
2280 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2281 break;
2282 default:
2283 cnt = 0;
2284 BT_ERR("Unknown link type");
2285 }
2286
2287 q = cnt / num;
1da177e4
LT		 2288 *quote = q ? q : 1;
2289 } else
2290 *quote = 0;
2291
2292 BT_DBG("conn %p quote %d", conn, *quote);
2293 return conn;
2294}
2295
6039aa73 2296static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2297{
2298 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2299 struct hci_conn *c;
1da177e4 2300
bae1f5d9 2301 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2302
bf4c6325
GP		 2303 rcu_read_lock();
2304
1da177e4 2305 /* Kill stalled connections */
bf4c6325 2306 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2307 if (c->type == type && c->sent) {
2308 BT_ERR("%s killing stalled connection %s",
a8c5fb1a 2309 hdev->name, batostr(&c->dst));
7490c6c2 2310 hci_acl_disconn(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2311 }
2312 }
bf4c6325
GP		 2313
2314 rcu_read_unlock();
1da177e4
LT		 2315}
2316
6039aa73
GP		 2317static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2318 int *quote)
1da177e4 2319{
73d80deb
LAD		 2320 struct hci_conn_hash *h = &hdev->conn_hash;
2321 struct hci_chan *chan = NULL;
abc5de8f 2322 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2323 struct hci_conn *conn;
73d80deb
LAD		 2324 int cnt, q, conn_num = 0;
2325
2326 BT_DBG("%s", hdev->name);
2327
bf4c6325
GP		 2328 rcu_read_lock();
2329
2330 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2331 struct hci_chan *tmp;
2332
2333 if (conn->type != type)
2334 continue;
2335
2336 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2337 continue;
2338
2339 conn_num++;
2340
8192edef 2341 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2342 struct sk_buff *skb;
2343
2344 if (skb_queue_empty(&tmp->data_q))
2345 continue;
2346
2347 skb = skb_peek(&tmp->data_q);
2348 if (skb->priority < cur_prio)
2349 continue;
2350
2351 if (skb->priority > cur_prio) {
2352 num = 0;
2353 min = ~0;
2354 cur_prio = skb->priority;
2355 }
2356
2357 num++;
2358
2359 if (conn->sent < min) {
2360 min = conn->sent;
2361 chan = tmp;
2362 }
2363 }
2364
2365 if (hci_conn_num(hdev, type) == conn_num)
2366 break;
2367 }
2368
bf4c6325
GP		 2369 rcu_read_unlock();
2370
73d80deb
LAD		 2371 if (!chan)
2372 return NULL;
2373
2374 switch (chan->conn->type) {
2375 case ACL_LINK:
2376 cnt = hdev->acl_cnt;
2377 break;
2378 case SCO_LINK:
2379 case ESCO_LINK:
2380 cnt = hdev->sco_cnt;
2381 break;
2382 case LE_LINK:
2383 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2384 break;
2385 default:
2386 cnt = 0;
2387 BT_ERR("Unknown link type");
2388 }
2389
2390 q = cnt / num;
2391 *quote = q ? q : 1;
2392 BT_DBG("chan %p quote %d", chan, *quote);
2393 return chan;
2394}
2395
02b20f0b
LAD		 2396static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2397{
2398 struct hci_conn_hash *h = &hdev->conn_hash;
2399 struct hci_conn *conn;
2400 int num = 0;
2401
2402 BT_DBG("%s", hdev->name);
2403
bf4c6325
GP		 2404 rcu_read_lock();
2405
2406 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2407 struct hci_chan *chan;
2408
2409 if (conn->type != type)
2410 continue;
2411
2412 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2413 continue;
2414
2415 num++;
2416
8192edef 2417 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2418 struct sk_buff *skb;
2419
2420 if (chan->sent) {
2421 chan->sent = 0;
2422 continue;
2423 }
2424
2425 if (skb_queue_empty(&chan->data_q))
2426 continue;
2427
2428 skb = skb_peek(&chan->data_q);
2429 if (skb->priority >= HCI_PRIO_MAX - 1)
2430 continue;
2431
2432 skb->priority = HCI_PRIO_MAX - 1;
2433
2434 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2435 skb->priority);
02b20f0b
LAD		 2436 }
2437
2438 if (hci_conn_num(hdev, type) == num)
2439 break;
2440 }
bf4c6325
GP		 2441
2442 rcu_read_unlock();
2443
02b20f0b
LAD		 2444}
2445
b71d385a
AE		 2446static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2447{
2448 /* Calculate count of blocks used by this packet */
2449 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2450}
2451
6039aa73 2452static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2453{
1da177e4
LT		 2454 if (!test_bit(HCI_RAW, &hdev->flags)) {
2455 /* ACL tx timeout must be longer than maximum
2456 * link supervision timeout (40.9 seconds) */
63d2bc1b 2457 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 2458 HCI_ACL_TX_TIMEOUT))
bae1f5d9 2459 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2460 }
63d2bc1b 2461}
1da177e4 2462
6039aa73 2463static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 2464{
2465 unsigned int cnt = hdev->acl_cnt;
2466 struct hci_chan *chan;
2467 struct sk_buff *skb;
2468 int quote;
2469
2470 __check_timeout(hdev, cnt);
04837f64 2471
73d80deb 2472 while (hdev->acl_cnt &&
a8c5fb1a 2473 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2474 u32 priority = (skb_peek(&chan->data_q))->priority;
2475 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2476 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2477 skb->len, skb->priority);
73d80deb 2478
ec1cce24
LAD		 2479 /* Stop if priority has changed */
2480 if (skb->priority < priority)
2481 break;
2482
2483 skb = skb_dequeue(&chan->data_q);
2484
73d80deb 2485 hci_conn_enter_active_mode(chan->conn,
04124681 2486 bt_cb(skb)->force_active);
04837f64 2487
1da177e4
LT		 2488 hci_send_frame(skb);
2489 hdev->acl_last_tx = jiffies;
2490
2491 hdev->acl_cnt--;
73d80deb
LAD		 2492 chan->sent++;
2493 chan->conn->sent++;
1da177e4
LT		 2494 }
2495 }
02b20f0b
LAD		 2496
2497 if (cnt != hdev->acl_cnt)
2498 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2499}
2500
6039aa73 2501static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 2502{
63d2bc1b 2503 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2504 struct hci_chan *chan;
2505 struct sk_buff *skb;
2506 int quote;
b71d385a 2507
63d2bc1b 2508 __check_timeout(hdev, cnt);
b71d385a
AE		 2509
2510 while (hdev->block_cnt > 0 &&
a8c5fb1a 2511 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
b71d385a
AE		 2512 u32 priority = (skb_peek(&chan->data_q))->priority;
2513 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2514 int blocks;
2515
2516 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2517 skb->len, skb->priority);
b71d385a
AE		 2518
2519 /* Stop if priority has changed */
2520 if (skb->priority < priority)
2521 break;
2522
2523 skb = skb_dequeue(&chan->data_q);
2524
2525 blocks = __get_blocks(hdev, skb);
2526 if (blocks > hdev->block_cnt)
2527 return;
2528
2529 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2530 bt_cb(skb)->force_active);
b71d385a
AE		 2531
2532 hci_send_frame(skb);
2533 hdev->acl_last_tx = jiffies;
2534
2535 hdev->block_cnt -= blocks;
2536 quote -= blocks;
2537
2538 chan->sent += blocks;
2539 chan->conn->sent += blocks;
2540 }
2541 }
2542
2543 if (cnt != hdev->block_cnt)
2544 hci_prio_recalculate(hdev, ACL_LINK);
2545}
2546
6039aa73 2547static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 2548{
2549 BT_DBG("%s", hdev->name);
2550
2551 if (!hci_conn_num(hdev, ACL_LINK))
2552 return;
2553
2554 switch (hdev->flow_ctl_mode) {
2555 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2556 hci_sched_acl_pkt(hdev);
2557 break;
2558
2559 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2560 hci_sched_acl_blk(hdev);
2561 break;
2562 }
2563}
2564
1da177e4 2565/* Schedule SCO */
6039aa73 2566static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 2567{
2568 struct hci_conn *conn;
2569 struct sk_buff *skb;
2570 int quote;
2571
2572 BT_DBG("%s", hdev->name);
2573
52087a79
LAD		 2574 if (!hci_conn_num(hdev, SCO_LINK))
2575 return;
2576
1da177e4
LT		 2577 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2578 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2579 BT_DBG("skb %p len %d", skb, skb->len);
2580 hci_send_frame(skb);
2581
2582 conn->sent++;
2583 if (conn->sent == ~0)
2584 conn->sent = 0;
2585 }
2586 }
2587}
2588
6039aa73 2589static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 2590{
2591 struct hci_conn *conn;
2592 struct sk_buff *skb;
2593 int quote;
2594
2595 BT_DBG("%s", hdev->name);
2596
52087a79
LAD		 2597 if (!hci_conn_num(hdev, ESCO_LINK))
2598 return;
2599
8fc9ced3
GP		 2600 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2601 &quote))) {
b6a0dc82
MH		 2602 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2603 BT_DBG("skb %p len %d", skb, skb->len);
2604 hci_send_frame(skb);
2605
2606 conn->sent++;
2607 if (conn->sent == ~0)
2608 conn->sent = 0;
2609 }
2610 }
2611}
2612
6039aa73 2613static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 2614{
73d80deb 2615 struct hci_chan *chan;
6ed58ec5 2616 struct sk_buff *skb;
02b20f0b 2617 int quote, cnt, tmp;
6ed58ec5
VT		 2618
2619 BT_DBG("%s", hdev->name);
2620
52087a79
LAD		 2621 if (!hci_conn_num(hdev, LE_LINK))
2622 return;
2623
6ed58ec5
VT		 2624 if (!test_bit(HCI_RAW, &hdev->flags)) {
2625 /* LE tx timeout must be longer than maximum
2626 * link supervision timeout (40.9 seconds) */
bae1f5d9 2627 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 2628 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2629 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2630 }
2631
2632 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2633 tmp = cnt;
73d80deb 2634 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2635 u32 priority = (skb_peek(&chan->data_q))->priority;
2636 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2637 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2638 skb->len, skb->priority);
6ed58ec5 2639
ec1cce24
LAD		 2640 /* Stop if priority has changed */
2641 if (skb->priority < priority)
2642 break;
2643
2644 skb = skb_dequeue(&chan->data_q);
2645
6ed58ec5
VT		 2646 hci_send_frame(skb);
2647 hdev->le_last_tx = jiffies;
2648
2649 cnt--;
73d80deb
LAD		 2650 chan->sent++;
2651 chan->conn->sent++;
6ed58ec5
VT		 2652 }
2653 }
73d80deb 2654
6ed58ec5
VT		 2655 if (hdev->le_pkts)
2656 hdev->le_cnt = cnt;
2657 else
2658 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2659
2660 if (cnt != tmp)
2661 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2662}
2663
3eff45ea 2664static void hci_tx_work(struct work_struct *work)
1da177e4 2665{
3eff45ea 2666 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2667 struct sk_buff *skb;
2668
6ed58ec5 2669 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 2670 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2671
2672 /* Schedule queues and send stuff to HCI driver */
2673
2674 hci_sched_acl(hdev);
2675
2676 hci_sched_sco(hdev);
2677
b6a0dc82
MH		 2678 hci_sched_esco(hdev);
2679
6ed58ec5
VT		 2680 hci_sched_le(hdev);
2681
1da177e4
LT		 2682 /* Send next queued raw (unknown type) packet */
2683 while ((skb = skb_dequeue(&hdev->raw_q)))
2684 hci_send_frame(skb);
1da177e4
LT		 2685}
2686
25985edc 2687/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2688
2689/* ACL data packet */
6039aa73 2690static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2691{
2692 struct hci_acl_hdr *hdr = (void *) skb->data;
2693 struct hci_conn *conn;
2694 __u16 handle, flags;
2695
2696 skb_pull(skb, HCI_ACL_HDR_SIZE);
2697
2698 handle = __le16_to_cpu(hdr->handle);
2699 flags = hci_flags(handle);
2700 handle = hci_handle(handle);
2701
f0e09510 2702 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 2703 handle, flags);
1da177e4
LT		 2704
2705 hdev->stat.acl_rx++;
2706
2707 hci_dev_lock(hdev);
2708 conn = hci_conn_hash_lookup_handle(hdev, handle);
2709 hci_dev_unlock(hdev);
8e87d142 2710
1da177e4 2711 if (conn) {
65983fc7 2712 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2713
671267bf
JH		 2714 hci_dev_lock(hdev);
2715 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2716 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2717 mgmt_device_connected(hdev, &conn->dst, conn->type,
2718 conn->dst_type, 0, NULL, 0,
2719 conn->dev_class);
2720 hci_dev_unlock(hdev);
2721
1da177e4 2722 /* Send to upper protocol */
686ebf28
UF		 2723 l2cap_recv_acldata(conn, skb, flags);
2724 return;
1da177e4 2725 } else {
8e87d142 2726 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 2727 hdev->name, handle);
1da177e4
LT		 2728 }
2729
2730 kfree_skb(skb);
2731}
2732
2733/* SCO data packet */
6039aa73 2734static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2735{
2736 struct hci_sco_hdr *hdr = (void *) skb->data;
2737 struct hci_conn *conn;
2738 __u16 handle;
2739
2740 skb_pull(skb, HCI_SCO_HDR_SIZE);
2741
2742 handle = __le16_to_cpu(hdr->handle);
2743
f0e09510 2744 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 2745
2746 hdev->stat.sco_rx++;
2747
2748 hci_dev_lock(hdev);
2749 conn = hci_conn_hash_lookup_handle(hdev, handle);
2750 hci_dev_unlock(hdev);
2751
2752 if (conn) {
1da177e4 2753 /* Send to upper protocol */
686ebf28
UF		 2754 sco_recv_scodata(conn, skb);
2755 return;
1da177e4 2756 } else {
8e87d142 2757 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 2758 hdev->name, handle);
1da177e4
LT		 2759 }
2760
2761 kfree_skb(skb);
2762}
2763
b78752cc 2764static void hci_rx_work(struct work_struct *work)
1da177e4 2765{
b78752cc 2766 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2767 struct sk_buff *skb;
2768
2769 BT_DBG("%s", hdev->name);
2770
1da177e4 2771 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2772 /* Send copy to monitor */
2773 hci_send_to_monitor(hdev, skb);
2774
1da177e4
LT		 2775 if (atomic_read(&hdev->promisc)) {
2776 /* Send copy to the sockets */
470fe1b5 2777 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2778 }
2779
2780 if (test_bit(HCI_RAW, &hdev->flags)) {
2781 kfree_skb(skb);
2782 continue;
2783 }
2784
2785 if (test_bit(HCI_INIT, &hdev->flags)) {
2786 /* Don't process data packets in this states. */
0d48d939 2787 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2788 case HCI_ACLDATA_PKT:
2789 case HCI_SCODATA_PKT:
2790 kfree_skb(skb);
2791 continue;
3ff50b79 2792 }
1da177e4
LT		 2793 }
2794
2795 /* Process frame */
0d48d939 2796 switch (bt_cb(skb)->pkt_type) {
1da177e4 2797 case HCI_EVENT_PKT:
b78752cc 2798 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2799 hci_event_packet(hdev, skb);
2800 break;
2801
2802 case HCI_ACLDATA_PKT:
2803 BT_DBG("%s ACL data packet", hdev->name);
2804 hci_acldata_packet(hdev, skb);
2805 break;
2806
2807 case HCI_SCODATA_PKT:
2808 BT_DBG("%s SCO data packet", hdev->name);
2809 hci_scodata_packet(hdev, skb);
2810 break;
2811
2812 default:
2813 kfree_skb(skb);
2814 break;
2815 }
2816 }
1da177e4
LT		 2817}
2818
c347b765 2819static void hci_cmd_work(struct work_struct *work)
1da177e4 2820{
c347b765 2821 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2822 struct sk_buff *skb;
2823
2104786b
AE		 2824 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
2825 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 2826
1da177e4 2827 /* Send queued commands */
5a08ecce
AE		 2828 if (atomic_read(&hdev->cmd_cnt)) {
2829 skb = skb_dequeue(&hdev->cmd_q);
2830 if (!skb)
2831 return;
2832
7585b97a 2833 kfree_skb(hdev->sent_cmd);
1da177e4 2834
70f23020
AE		 2835 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2836 if (hdev->sent_cmd) {
1da177e4
LT		 2837 atomic_dec(&hdev->cmd_cnt);
2838 hci_send_frame(skb);
7bdb8a5c
SJ		 2839 if (test_bit(HCI_RESET, &hdev->flags))
2840 del_timer(&hdev->cmd_timer);
2841 else
2842 mod_timer(&hdev->cmd_timer,
5f246e89 2843 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 2844 } else {
2845 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2846 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2847 }
2848 }
2849}
2519a1fc
AG		 2850
2851int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2852{
2853 /* General inquiry access code (GIAC) */
2854 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2855 struct hci_cp_inquiry cp;
2856
2857 BT_DBG("%s", hdev->name);
2858
2859 if (test_bit(HCI_INQUIRY, &hdev->flags))
2860 return -EINPROGRESS;
2861
4663262c
JH		 2862 inquiry_cache_flush(hdev);
2863
2519a1fc
AG		 2864 memset(&cp, 0, sizeof(cp));
2865 memcpy(&cp.lap, lap, sizeof(cp.lap));
2866 cp.length = length;
2867
2868 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2869}
023d5049
AG		 2870
2871int hci_cancel_inquiry(struct hci_dev *hdev)
2872{
2873 BT_DBG("%s", hdev->name);
2874
2875 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2876 return -EALREADY;
023d5049
AG		 2877
2878 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2879}
31f7956c
AG		 2880
2881u8 bdaddr_to_le(u8 bdaddr_type)
2882{
2883 switch (bdaddr_type) {
2884 case BDADDR_LE_PUBLIC:
2885 return ADDR_LE_DEV_PUBLIC;
2886
2887 default:
2888 /* Fallback to LE Random address type */
2889 return ADDR_LE_DEV_RANDOM;
2890 }
2891}
kernel source for telekom puls (alcatel/mediatek)