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Bluetooth: Remove unnecessary headers include
[deliverable/linux.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
1da177e4 29
8c520a59 30#include <linux/rfkill.h>
1da177e4
LT		 31
32#include <net/bluetooth/bluetooth.h>
33#include <net/bluetooth/hci_core.h>
34
ab81cbf9
JH		 35#define AUTO_OFF_TIMEOUT 2000
36
b78752cc 37static void hci_rx_work(struct work_struct *work);
c347b765 38static void hci_cmd_work(struct work_struct *work);
3eff45ea 39static void hci_tx_work(struct work_struct *work);
1da177e4 40
1da177e4
LT		 41/* HCI device list */
42LIST_HEAD(hci_dev_list);
43DEFINE_RWLOCK(hci_dev_list_lock);
44
45/* HCI callback list */
46LIST_HEAD(hci_cb_list);
47DEFINE_RWLOCK(hci_cb_list_lock);
48
1da177e4
LT		 49/* ---- HCI notifications ---- */
50
6516455d 51static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 52{
040030ef 53 hci_sock_dev_event(hdev, event);
1da177e4
LT		 54}
55
56/* ---- HCI requests ---- */
57
23bb5763 58void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 59{
23bb5763
JH		 60 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
61
a5040efa
JH		 62 /* If this is the init phase check if the completed command matches
63 * the last init command, and if not just return.
64 */
75fb0e32
JH		 65 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
66 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1036b890 67 u16 opcode = __le16_to_cpu(sent->opcode);
75fb0e32
JH		 68 struct sk_buff *skb;
69
70 /* Some CSR based controllers generate a spontaneous
71 * reset complete event during init and any pending
72 * command will never be completed. In such a case we
73 * need to resend whatever was the last sent
74 * command.
75 */
76
1036b890 77 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
75fb0e32
JH		 78 return;
79
80 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
81 if (skb) {
82 skb_queue_head(&hdev->cmd_q, skb);
83 queue_work(hdev->workqueue, &hdev->cmd_work);
84 }
85
23bb5763 86 return;
75fb0e32 87 }
1da177e4
LT		 88
89 if (hdev->req_status == HCI_REQ_PEND) {
90 hdev->req_result = result;
91 hdev->req_status = HCI_REQ_DONE;
92 wake_up_interruptible(&hdev->req_wait_q);
93 }
94}
95
96static void hci_req_cancel(struct hci_dev *hdev, int err)
97{
98 BT_DBG("%s err 0x%2.2x", hdev->name, err);
99
100 if (hdev->req_status == HCI_REQ_PEND) {
101 hdev->req_result = err;
102 hdev->req_status = HCI_REQ_CANCELED;
103 wake_up_interruptible(&hdev->req_wait_q);
104 }
105}
106
107/* Execute request and wait for completion. */
a8c5fb1a
GP		 108static int __hci_request(struct hci_dev *hdev,
109 void (*req)(struct hci_dev *hdev, unsigned long opt),
110 unsigned long opt, __u32 timeout)
1da177e4
LT		 111{
112 DECLARE_WAITQUEUE(wait, current);
113 int err = 0;
114
115 BT_DBG("%s start", hdev->name);
116
117 hdev->req_status = HCI_REQ_PEND;
118
119 add_wait_queue(&hdev->req_wait_q, &wait);
120 set_current_state(TASK_INTERRUPTIBLE);
121
122 req(hdev, opt);
123 schedule_timeout(timeout);
124
125 remove_wait_queue(&hdev->req_wait_q, &wait);
126
127 if (signal_pending(current))
128 return -EINTR;
129
130 switch (hdev->req_status) {
131 case HCI_REQ_DONE:
e175072f 132 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 133 break;
134
135 case HCI_REQ_CANCELED:
136 err = -hdev->req_result;
137 break;
138
139 default:
140 err = -ETIMEDOUT;
141 break;
3ff50b79 142 }
1da177e4 143
a5040efa 144 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 145
146 BT_DBG("%s end: err %d", hdev->name, err);
147
148 return err;
149}
150
6039aa73
GP		 151static int hci_request(struct hci_dev *hdev,
152 void (*req)(struct hci_dev *hdev, unsigned long opt),
153 unsigned long opt, __u32 timeout)
1da177e4
LT		 154{
155 int ret;
156
7c6a329e
MH		 157 if (!test_bit(HCI_UP, &hdev->flags))
158 return -ENETDOWN;
159
1da177e4
LT		 160 /* Serialize all requests */
161 hci_req_lock(hdev);
162 ret = __hci_request(hdev, req, opt, timeout);
163 hci_req_unlock(hdev);
164
165 return ret;
166}
167
168static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
169{
170 BT_DBG("%s %ld", hdev->name, opt);
171
172 /* Reset device */
f630cf0d 173 set_bit(HCI_RESET, &hdev->flags);
a9de9248 174 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 175}
176
e61ef499 177static void bredr_init(struct hci_dev *hdev)
1da177e4 178{
b0916ea0 179 struct hci_cp_delete_stored_link_key cp;
1ebb9252 180 __le16 param;
89f2783d 181 __u8 flt_type;
1da177e4 182
2455a3ea
AE		 183 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
184
1da177e4
LT		 185 /* Mandatory initialization */
186
187 /* Reset */
a6c511c6 188 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
e61ef499
AE		 189 set_bit(HCI_RESET, &hdev->flags);
190 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 191 }
1da177e4
LT		 192
193 /* Read Local Supported Features */
a9de9248 194 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 195
1143e5a6 196 /* Read Local Version */
a9de9248 197 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 198
1da177e4 199 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 200 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 201
1da177e4 202 /* Read BD Address */
a9de9248
MH		 203 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
204
205 /* Read Class of Device */
206 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
207
208 /* Read Local Name */
209 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 210
211 /* Read Voice Setting */
a9de9248 212 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 213
214 /* Optional initialization */
215
216 /* Clear Event Filters */
89f2783d 217 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 218 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 219
1da177e4 220 /* Connection accept timeout ~20 secs */
aca3192c 221 param = cpu_to_le16(0x7d00);
a9de9248 222 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 223
224 bacpy(&cp.bdaddr, BDADDR_ANY);
225 cp.delete_all = 1;
226 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 227}
228
e61ef499
AE		 229static void amp_init(struct hci_dev *hdev)
230{
2455a3ea
AE		 231 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
232
e61ef499
AE		 233 /* Reset */
234 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
235
236 /* Read Local Version */
237 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 238
239 /* Read Local AMP Info */
240 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e61ef499
AE		 241}
242
243static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
244{
245 struct sk_buff *skb;
246
247 BT_DBG("%s %ld", hdev->name, opt);
248
249 /* Driver initialization */
250
251 /* Special commands */
252 while ((skb = skb_dequeue(&hdev->driver_init))) {
253 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
254 skb->dev = (void *) hdev;
255
256 skb_queue_tail(&hdev->cmd_q, skb);
257 queue_work(hdev->workqueue, &hdev->cmd_work);
258 }
259 skb_queue_purge(&hdev->driver_init);
260
261 switch (hdev->dev_type) {
262 case HCI_BREDR:
263 bredr_init(hdev);
264 break;
265
266 case HCI_AMP:
267 amp_init(hdev);
268 break;
269
270 default:
271 BT_ERR("Unknown device type %d", hdev->dev_type);
272 break;
273 }
274
275}
276
6ed58ec5
VT		 277static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
278{
279 BT_DBG("%s", hdev->name);
280
281 /* Read LE buffer size */
282 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
283}
284
1da177e4
LT		 285static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
286{
287 __u8 scan = opt;
288
289 BT_DBG("%s %x", hdev->name, scan);
290
291 /* Inquiry and Page scans */
a9de9248 292 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 293}
294
295static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
296{
297 __u8 auth = opt;
298
299 BT_DBG("%s %x", hdev->name, auth);
300
301 /* Authentication */
a9de9248 302 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 303}
304
305static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
306{
307 __u8 encrypt = opt;
308
309 BT_DBG("%s %x", hdev->name, encrypt);
310
e4e8e37c 311 /* Encryption */
a9de9248 312 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 313}
314
e4e8e37c
MH		 315static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
316{
317 __le16 policy = cpu_to_le16(opt);
318
a418b893 319 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 320
321 /* Default link policy */
322 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
323}
324
8e87d142 325/* Get HCI device by index.
1da177e4
LT		 326 * Device is held on return. */
327struct hci_dev *hci_dev_get(int index)
328{
8035ded4 329 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 330
331 BT_DBG("%d", index);
332
333 if (index < 0)
334 return NULL;
335
336 read_lock(&hci_dev_list_lock);
8035ded4 337 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 338 if (d->id == index) {
339 hdev = hci_dev_hold(d);
340 break;
341 }
342 }
343 read_unlock(&hci_dev_list_lock);
344 return hdev;
345}
1da177e4
LT		 346
347/* ---- Inquiry support ---- */
ff9ef578 348
30dc78e1
JH		 349bool hci_discovery_active(struct hci_dev *hdev)
350{
351 struct discovery_state *discov = &hdev->discovery;
352
6fbe195d 353 switch (discov->state) {
343f935b 354 case DISCOVERY_FINDING:
6fbe195d 355 case DISCOVERY_RESOLVING:
30dc78e1
JH		 356 return true;
357
6fbe195d
AG		 358 default:
359 return false;
360 }
30dc78e1
JH		 361}
362
ff9ef578
JH		 363void hci_discovery_set_state(struct hci_dev *hdev, int state)
364{
365 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
366
367 if (hdev->discovery.state == state)
368 return;
369
370 switch (state) {
371 case DISCOVERY_STOPPED:
7b99b659
AG		 372 if (hdev->discovery.state != DISCOVERY_STARTING)
373 mgmt_discovering(hdev, 0);
ff9ef578
JH		 374 break;
375 case DISCOVERY_STARTING:
376 break;
343f935b 377 case DISCOVERY_FINDING:
ff9ef578
JH		 378 mgmt_discovering(hdev, 1);
379 break;
30dc78e1
JH		 380 case DISCOVERY_RESOLVING:
381 break;
ff9ef578
JH		 382 case DISCOVERY_STOPPING:
383 break;
384 }
385
386 hdev->discovery.state = state;
387}
388
1da177e4
LT		 389static void inquiry_cache_flush(struct hci_dev *hdev)
390{
30883512 391 struct discovery_state *cache = &hdev->discovery;
b57c1a56 392 struct inquiry_entry *p, *n;
1da177e4 393
561aafbc
JH		 394 list_for_each_entry_safe(p, n, &cache->all, all) {
395 list_del(&p->all);
b57c1a56 396 kfree(p);
1da177e4 397 }
561aafbc
JH		 398
399 INIT_LIST_HEAD(&cache->unknown);
400 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 401}
402
a8c5fb1a
GP		 403struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
404 bdaddr_t *bdaddr)
1da177e4 405{
30883512 406 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 407 struct inquiry_entry *e;
408
409 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
410
561aafbc
JH		 411 list_for_each_entry(e, &cache->all, all) {
412 if (!bacmp(&e->data.bdaddr, bdaddr))
413 return e;
414 }
415
416 return NULL;
417}
418
419struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 420 bdaddr_t *bdaddr)
561aafbc 421{
30883512 422 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 423 struct inquiry_entry *e;
424
425 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
426
427 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 428 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 429 return e;
430 }
431
432 return NULL;
1da177e4
LT		 433}
434
30dc78e1 435struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 436 bdaddr_t *bdaddr,
437 int state)
30dc78e1
JH		 438{
439 struct discovery_state *cache = &hdev->discovery;
440 struct inquiry_entry *e;
441
442 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
443
444 list_for_each_entry(e, &cache->resolve, list) {
445 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
446 return e;
447 if (!bacmp(&e->data.bdaddr, bdaddr))
448 return e;
449 }
450
451 return NULL;
452}
453
a3d4e20a 454void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 455 struct inquiry_entry *ie)
a3d4e20a
JH		 456{
457 struct discovery_state *cache = &hdev->discovery;
458 struct list_head *pos = &cache->resolve;
459 struct inquiry_entry *p;
460
461 list_del(&ie->list);
462
463 list_for_each_entry(p, &cache->resolve, list) {
464 if (p->name_state != NAME_PENDING &&
a8c5fb1a 465 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 466 break;
467 pos = &p->list;
468 }
469
470 list_add(&ie->list, pos);
471}
472
3175405b 473bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 474 bool name_known, bool *ssp)
1da177e4 475{
30883512 476 struct discovery_state *cache = &hdev->discovery;
70f23020 477 struct inquiry_entry *ie;
1da177e4
LT		 478
479 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
480
388fc8fa
JH		 481 if (ssp)
482 *ssp = data->ssp_mode;
483
70f23020 484 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 485 if (ie) {
388fc8fa
JH		 486 if (ie->data.ssp_mode && ssp)
487 *ssp = true;
488
a3d4e20a 489 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 490 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 491 ie->data.rssi = data->rssi;
492 hci_inquiry_cache_update_resolve(hdev, ie);
493 }
494
561aafbc 495 goto update;
a3d4e20a 496 }
561aafbc
JH		 497
498 /* Entry not in the cache. Add new one. */
499 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
500 if (!ie)
3175405b 501 return false;
561aafbc
JH		 502
503 list_add(&ie->all, &cache->all);
504
505 if (name_known) {
506 ie->name_state = NAME_KNOWN;
507 } else {
508 ie->name_state = NAME_NOT_KNOWN;
509 list_add(&ie->list, &cache->unknown);
510 }
70f23020 511
561aafbc
JH		 512update:
513 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 514 ie->name_state != NAME_PENDING) {
561aafbc
JH		 515 ie->name_state = NAME_KNOWN;
516 list_del(&ie->list);
1da177e4
LT		 517 }
518
70f23020
AE		 519 memcpy(&ie->data, data, sizeof(*data));
520 ie->timestamp = jiffies;
1da177e4 521 cache->timestamp = jiffies;
3175405b
JH		 522
523 if (ie->name_state == NAME_NOT_KNOWN)
524 return false;
525
526 return true;
1da177e4
LT		 527}
528
529static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
530{
30883512 531 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 532 struct inquiry_info *info = (struct inquiry_info *) buf;
533 struct inquiry_entry *e;
534 int copied = 0;
535
561aafbc 536 list_for_each_entry(e, &cache->all, all) {
1da177e4 537 struct inquiry_data *data = &e->data;
b57c1a56
JH		 538
539 if (copied >= num)
540 break;
541
1da177e4
LT		 542 bacpy(&info->bdaddr, &data->bdaddr);
543 info->pscan_rep_mode = data->pscan_rep_mode;
544 info->pscan_period_mode = data->pscan_period_mode;
545 info->pscan_mode = data->pscan_mode;
546 memcpy(info->dev_class, data->dev_class, 3);
547 info->clock_offset = data->clock_offset;
b57c1a56 548
1da177e4 549 info++;
b57c1a56 550 copied++;
1da177e4
LT		 551 }
552
553 BT_DBG("cache %p, copied %d", cache, copied);
554 return copied;
555}
556
557static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
558{
559 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
560 struct hci_cp_inquiry cp;
561
562 BT_DBG("%s", hdev->name);
563
564 if (test_bit(HCI_INQUIRY, &hdev->flags))
565 return;
566
567 /* Start Inquiry */
568 memcpy(&cp.lap, &ir->lap, 3);
569 cp.length = ir->length;
570 cp.num_rsp = ir->num_rsp;
a9de9248 571 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 572}
573
574int hci_inquiry(void __user *arg)
575{
576 __u8 __user *ptr = arg;
577 struct hci_inquiry_req ir;
578 struct hci_dev *hdev;
579 int err = 0, do_inquiry = 0, max_rsp;
580 long timeo;
581 __u8 *buf;
582
583 if (copy_from_user(&ir, ptr, sizeof(ir)))
584 return -EFAULT;
585
5a08ecce
AE		 586 hdev = hci_dev_get(ir.dev_id);
587 if (!hdev)
1da177e4
LT		 588 return -ENODEV;
589
09fd0de5 590 hci_dev_lock(hdev);
8e87d142 591 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 592 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 593 inquiry_cache_flush(hdev);
594 do_inquiry = 1;
595 }
09fd0de5 596 hci_dev_unlock(hdev);
1da177e4 597
04837f64 598 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 599
600 if (do_inquiry) {
601 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
602 if (err < 0)
603 goto done;
604 }
1da177e4 605
8fc9ced3
GP		 606 /* for unlimited number of responses we will use buffer with
607 * 255 entries
608 */
1da177e4
LT		 609 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
610
611 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
612 * copy it to the user space.
613 */
01df8c31 614 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 615 if (!buf) {
1da177e4
LT		 616 err = -ENOMEM;
617 goto done;
618 }
619
09fd0de5 620 hci_dev_lock(hdev);
1da177e4 621 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 622 hci_dev_unlock(hdev);
1da177e4
LT		 623
624 BT_DBG("num_rsp %d", ir.num_rsp);
625
626 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
627 ptr += sizeof(ir);
628 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 629 ir.num_rsp))
1da177e4 630 err = -EFAULT;
8e87d142 631 } else
1da177e4
LT		 632 err = -EFAULT;
633
634 kfree(buf);
635
636done:
637 hci_dev_put(hdev);
638 return err;
639}
640
641/* ---- HCI ioctl helpers ---- */
642
643int hci_dev_open(__u16 dev)
644{
645 struct hci_dev *hdev;
646 int ret = 0;
647
5a08ecce
AE		 648 hdev = hci_dev_get(dev);
649 if (!hdev)
1da177e4
LT		 650 return -ENODEV;
651
652 BT_DBG("%s %p", hdev->name, hdev);
653
654 hci_req_lock(hdev);
655
94324962
JH		 656 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
657 ret = -ENODEV;
658 goto done;
659 }
660
611b30f7
MH		 661 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
662 ret = -ERFKILL;
663 goto done;
664 }
665
1da177e4
LT		 666 if (test_bit(HCI_UP, &hdev->flags)) {
667 ret = -EALREADY;
668 goto done;
669 }
670
671 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
672 set_bit(HCI_RAW, &hdev->flags);
673
07e3b94a
AE		 674 /* Treat all non BR/EDR controllers as raw devices if
675 enable_hs is not set */
676 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 677 set_bit(HCI_RAW, &hdev->flags);
678
1da177e4
LT		 679 if (hdev->open(hdev)) {
680 ret = -EIO;
681 goto done;
682 }
683
684 if (!test_bit(HCI_RAW, &hdev->flags)) {
685 atomic_set(&hdev->cmd_cnt, 1);
686 set_bit(HCI_INIT, &hdev->flags);
a5040efa 687 hdev->init_last_cmd = 0;
1da177e4 688
04837f64 689 ret = __hci_request(hdev, hci_init_req, 0,
a8c5fb1a 690 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 691
eead27da 692 if (lmp_host_le_capable(hdev))
6ed58ec5 693 ret = __hci_request(hdev, hci_le_init_req, 0,
a8c5fb1a 694 msecs_to_jiffies(HCI_INIT_TIMEOUT));
6ed58ec5 695
1da177e4
LT		 696 clear_bit(HCI_INIT, &hdev->flags);
697 }
698
699 if (!ret) {
700 hci_dev_hold(hdev);
701 set_bit(HCI_UP, &hdev->flags);
702 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 703 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 704 hci_dev_lock(hdev);
744cf19e 705 mgmt_powered(hdev, 1);
09fd0de5 706 hci_dev_unlock(hdev);
56e5cb86 707 }
8e87d142 708 } else {
1da177e4 709 /* Init failed, cleanup */
3eff45ea 710 flush_work(&hdev->tx_work);
c347b765 711 flush_work(&hdev->cmd_work);
b78752cc 712 flush_work(&hdev->rx_work);
1da177e4
LT		 713
714 skb_queue_purge(&hdev->cmd_q);
715 skb_queue_purge(&hdev->rx_q);
716
717 if (hdev->flush)
718 hdev->flush(hdev);
719
720 if (hdev->sent_cmd) {
721 kfree_skb(hdev->sent_cmd);
722 hdev->sent_cmd = NULL;
723 }
724
725 hdev->close(hdev);
726 hdev->flags = 0;
727 }
728
729done:
730 hci_req_unlock(hdev);
731 hci_dev_put(hdev);
732 return ret;
733}
734
735static int hci_dev_do_close(struct hci_dev *hdev)
736{
737 BT_DBG("%s %p", hdev->name, hdev);
738
28b75a89
AG		 739 cancel_work_sync(&hdev->le_scan);
740
1da177e4
LT		 741 hci_req_cancel(hdev, ENODEV);
742 hci_req_lock(hdev);
743
744 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 745 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 746 hci_req_unlock(hdev);
747 return 0;
748 }
749
3eff45ea
GP		 750 /* Flush RX and TX works */
751 flush_work(&hdev->tx_work);
b78752cc 752 flush_work(&hdev->rx_work);
1da177e4 753
16ab91ab 754 if (hdev->discov_timeout > 0) {
e0f9309f 755 cancel_delayed_work(&hdev->discov_off);
16ab91ab 756 hdev->discov_timeout = 0;
5e5282bb 757 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 758 }
759
a8b2d5c2 760 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 761 cancel_delayed_work(&hdev->service_cache);
762
7ba8b4be
AG		 763 cancel_delayed_work_sync(&hdev->le_scan_disable);
764
09fd0de5 765 hci_dev_lock(hdev);
1da177e4
LT		 766 inquiry_cache_flush(hdev);
767 hci_conn_hash_flush(hdev);
09fd0de5 768 hci_dev_unlock(hdev);
1da177e4
LT		 769
770 hci_notify(hdev, HCI_DEV_DOWN);
771
772 if (hdev->flush)
773 hdev->flush(hdev);
774
775 /* Reset device */
776 skb_queue_purge(&hdev->cmd_q);
777 atomic_set(&hdev->cmd_cnt, 1);
8af59467 778 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 779 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 780 set_bit(HCI_INIT, &hdev->flags);
04837f64 781 __hci_request(hdev, hci_reset_req, 0,
a8c5fb1a 782 msecs_to_jiffies(250));
1da177e4
LT		 783 clear_bit(HCI_INIT, &hdev->flags);
784 }
785
c347b765
GP		 786 /* flush cmd work */
787 flush_work(&hdev->cmd_work);
1da177e4
LT		 788
789 /* Drop queues */
790 skb_queue_purge(&hdev->rx_q);
791 skb_queue_purge(&hdev->cmd_q);
792 skb_queue_purge(&hdev->raw_q);
793
794 /* Drop last sent command */
795 if (hdev->sent_cmd) {
b79f44c1 796 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 797 kfree_skb(hdev->sent_cmd);
798 hdev->sent_cmd = NULL;
799 }
800
801 /* After this point our queues are empty
802 * and no tasks are scheduled. */
803 hdev->close(hdev);
804
8ee56540
MH		 805 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
806 hci_dev_lock(hdev);
807 mgmt_powered(hdev, 0);
808 hci_dev_unlock(hdev);
809 }
5add6af8 810
1da177e4
LT		 811 /* Clear flags */
812 hdev->flags = 0;
813
e59fda8d 814 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 815 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 816
1da177e4
LT		 817 hci_req_unlock(hdev);
818
819 hci_dev_put(hdev);
820 return 0;
821}
822
823int hci_dev_close(__u16 dev)
824{
825 struct hci_dev *hdev;
826 int err;
827
70f23020
AE		 828 hdev = hci_dev_get(dev);
829 if (!hdev)
1da177e4 830 return -ENODEV;
8ee56540
MH		 831
832 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
833 cancel_delayed_work(&hdev->power_off);
834
1da177e4 835 err = hci_dev_do_close(hdev);
8ee56540 836
1da177e4
LT		 837 hci_dev_put(hdev);
838 return err;
839}
840
841int hci_dev_reset(__u16 dev)
842{
843 struct hci_dev *hdev;
844 int ret = 0;
845
70f23020
AE		 846 hdev = hci_dev_get(dev);
847 if (!hdev)
1da177e4
LT		 848 return -ENODEV;
849
850 hci_req_lock(hdev);
1da177e4
LT		 851
852 if (!test_bit(HCI_UP, &hdev->flags))
853 goto done;
854
855 /* Drop queues */
856 skb_queue_purge(&hdev->rx_q);
857 skb_queue_purge(&hdev->cmd_q);
858
09fd0de5 859 hci_dev_lock(hdev);
1da177e4
LT		 860 inquiry_cache_flush(hdev);
861 hci_conn_hash_flush(hdev);
09fd0de5 862 hci_dev_unlock(hdev);
1da177e4
LT		 863
864 if (hdev->flush)
865 hdev->flush(hdev);
866
8e87d142 867 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 868 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 869
870 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64 871 ret = __hci_request(hdev, hci_reset_req, 0,
a8c5fb1a 872 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 873
874done:
1da177e4
LT		 875 hci_req_unlock(hdev);
876 hci_dev_put(hdev);
877 return ret;
878}
879
880int hci_dev_reset_stat(__u16 dev)
881{
882 struct hci_dev *hdev;
883 int ret = 0;
884
70f23020
AE		 885 hdev = hci_dev_get(dev);
886 if (!hdev)
1da177e4
LT		 887 return -ENODEV;
888
889 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
890
891 hci_dev_put(hdev);
892
893 return ret;
894}
895
896int hci_dev_cmd(unsigned int cmd, void __user *arg)
897{
898 struct hci_dev *hdev;
899 struct hci_dev_req dr;
900 int err = 0;
901
902 if (copy_from_user(&dr, arg, sizeof(dr)))
903 return -EFAULT;
904
70f23020
AE		 905 hdev = hci_dev_get(dr.dev_id);
906 if (!hdev)
1da177e4
LT		 907 return -ENODEV;
908
909 switch (cmd) {
910 case HCISETAUTH:
04837f64 911 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
a8c5fb1a 912 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 913 break;
914
915 case HCISETENCRYPT:
916 if (!lmp_encrypt_capable(hdev)) {
917 err = -EOPNOTSUPP;
918 break;
919 }
920
921 if (!test_bit(HCI_AUTH, &hdev->flags)) {
922 /* Auth must be enabled first */
04837f64 923 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
a8c5fb1a 924 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 925 if (err)
926 break;
927 }
928
04837f64 929 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
a8c5fb1a 930 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 931 break;
932
933 case HCISETSCAN:
04837f64 934 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
a8c5fb1a 935 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 936 break;
937
1da177e4 938 case HCISETLINKPOL:
e4e8e37c 939 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
a8c5fb1a 940 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 941 break;
942
943 case HCISETLINKMODE:
e4e8e37c
MH		 944 hdev->link_mode = ((__u16) dr.dev_opt) &
945 (HCI_LM_MASTER | HCI_LM_ACCEPT);
946 break;
947
948 case HCISETPTYPE:
949 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 950 break;
951
952 case HCISETACLMTU:
e4e8e37c
MH		 953 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
954 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 955 break;
956
957 case HCISETSCOMTU:
e4e8e37c
MH		 958 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
959 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 960 break;
961
962 default:
963 err = -EINVAL;
964 break;
965 }
e4e8e37c 966
1da177e4
LT		 967 hci_dev_put(hdev);
968 return err;
969}
970
971int hci_get_dev_list(void __user *arg)
972{
8035ded4 973 struct hci_dev *hdev;
1da177e4
LT		 974 struct hci_dev_list_req *dl;
975 struct hci_dev_req *dr;
1da177e4
LT		 976 int n = 0, size, err;
977 __u16 dev_num;
978
979 if (get_user(dev_num, (__u16 __user *) arg))
980 return -EFAULT;
981
982 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
983 return -EINVAL;
984
985 size = sizeof(*dl) + dev_num * sizeof(*dr);
986
70f23020
AE		 987 dl = kzalloc(size, GFP_KERNEL);
988 if (!dl)
1da177e4
LT		 989 return -ENOMEM;
990
991 dr = dl->dev_req;
992
f20d09d5 993 read_lock(&hci_dev_list_lock);
8035ded4 994 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 995 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 996 cancel_delayed_work(&hdev->power_off);
c542a06c 997
a8b2d5c2
JH		 998 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
999 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1000
1da177e4
LT		 1001 (dr + n)->dev_id = hdev->id;
1002 (dr + n)->dev_opt = hdev->flags;
c542a06c 1003
1da177e4
LT		 1004 if (++n >= dev_num)
1005 break;
1006 }
f20d09d5 1007 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1008
1009 dl->dev_num = n;
1010 size = sizeof(*dl) + n * sizeof(*dr);
1011
1012 err = copy_to_user(arg, dl, size);
1013 kfree(dl);
1014
1015 return err ? -EFAULT : 0;
1016}
1017
1018int hci_get_dev_info(void __user *arg)
1019{
1020 struct hci_dev *hdev;
1021 struct hci_dev_info di;
1022 int err = 0;
1023
1024 if (copy_from_user(&di, arg, sizeof(di)))
1025 return -EFAULT;
1026
70f23020
AE		 1027 hdev = hci_dev_get(di.dev_id);
1028 if (!hdev)
1da177e4
LT		 1029 return -ENODEV;
1030
a8b2d5c2 1031 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1032 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1033
a8b2d5c2
JH		 1034 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1035 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1036
1da177e4
LT		 1037 strcpy(di.name, hdev->name);
1038 di.bdaddr = hdev->bdaddr;
943da25d 1039 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1040 di.flags = hdev->flags;
1041 di.pkt_type = hdev->pkt_type;
1042 di.acl_mtu = hdev->acl_mtu;
1043 di.acl_pkts = hdev->acl_pkts;
1044 di.sco_mtu = hdev->sco_mtu;
1045 di.sco_pkts = hdev->sco_pkts;
1046 di.link_policy = hdev->link_policy;
1047 di.link_mode = hdev->link_mode;
1048
1049 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1050 memcpy(&di.features, &hdev->features, sizeof(di.features));
1051
1052 if (copy_to_user(arg, &di, sizeof(di)))
1053 err = -EFAULT;
1054
1055 hci_dev_put(hdev);
1056
1057 return err;
1058}
1059
1060/* ---- Interface to HCI drivers ---- */
1061
611b30f7
MH		 1062static int hci_rfkill_set_block(void *data, bool blocked)
1063{
1064 struct hci_dev *hdev = data;
1065
1066 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1067
1068 if (!blocked)
1069 return 0;
1070
1071 hci_dev_do_close(hdev);
1072
1073 return 0;
1074}
1075
1076static const struct rfkill_ops hci_rfkill_ops = {
1077 .set_block = hci_rfkill_set_block,
1078};
1079
ab81cbf9
JH		 1080static void hci_power_on(struct work_struct *work)
1081{
1082 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1083
1084 BT_DBG("%s", hdev->name);
1085
1086 if (hci_dev_open(hdev->id) < 0)
1087 return;
1088
a8b2d5c2 1089 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1090 schedule_delayed_work(&hdev->power_off,
a8c5fb1a 1091 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1092
a8b2d5c2 1093 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1094 mgmt_index_added(hdev);
ab81cbf9
JH		 1095}
1096
1097static void hci_power_off(struct work_struct *work)
1098{
3243553f 1099 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1100 power_off.work);
ab81cbf9
JH		 1101
1102 BT_DBG("%s", hdev->name);
1103
8ee56540 1104 hci_dev_do_close(hdev);
ab81cbf9
JH		 1105}
1106
16ab91ab
JH		 1107static void hci_discov_off(struct work_struct *work)
1108{
1109 struct hci_dev *hdev;
1110 u8 scan = SCAN_PAGE;
1111
1112 hdev = container_of(work, struct hci_dev, discov_off.work);
1113
1114 BT_DBG("%s", hdev->name);
1115
09fd0de5 1116 hci_dev_lock(hdev);
16ab91ab
JH		 1117
1118 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1119
1120 hdev->discov_timeout = 0;
1121
09fd0de5 1122 hci_dev_unlock(hdev);
16ab91ab
JH		 1123}
1124
2aeb9a1a
JH		 1125int hci_uuids_clear(struct hci_dev *hdev)
1126{
1127 struct list_head *p, *n;
1128
1129 list_for_each_safe(p, n, &hdev->uuids) {
1130 struct bt_uuid *uuid;
1131
1132 uuid = list_entry(p, struct bt_uuid, list);
1133
1134 list_del(p);
1135 kfree(uuid);
1136 }
1137
1138 return 0;
1139}
1140
55ed8ca1
JH		 1141int hci_link_keys_clear(struct hci_dev *hdev)
1142{
1143 struct list_head *p, *n;
1144
1145 list_for_each_safe(p, n, &hdev->link_keys) {
1146 struct link_key *key;
1147
1148 key = list_entry(p, struct link_key, list);
1149
1150 list_del(p);
1151 kfree(key);
1152 }
1153
1154 return 0;
1155}
1156
b899efaf
VCG		 1157int hci_smp_ltks_clear(struct hci_dev *hdev)
1158{
1159 struct smp_ltk *k, *tmp;
1160
1161 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1162 list_del(&k->list);
1163 kfree(k);
1164 }
1165
1166 return 0;
1167}
1168
55ed8ca1
JH		 1169struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1170{
8035ded4 1171 struct link_key *k;
55ed8ca1 1172
8035ded4 1173 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1174 if (bacmp(bdaddr, &k->bdaddr) == 0)
1175 return k;
55ed8ca1
JH		 1176
1177 return NULL;
1178}
1179
745c0ce3 1180static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1181 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1182{
1183 /* Legacy key */
1184 if (key_type < 0x03)
745c0ce3 1185 return true;
d25e28ab
JH		 1186
1187 /* Debug keys are insecure so don't store them persistently */
1188 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1189 return false;
d25e28ab
JH		 1190
1191 /* Changed combination key and there's no previous one */
1192 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1193 return false;
d25e28ab
JH		 1194
1195 /* Security mode 3 case */
1196 if (!conn)
745c0ce3 1197 return true;
d25e28ab
JH		 1198
1199 /* Neither local nor remote side had no-bonding as requirement */
1200 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1201 return true;
d25e28ab
JH		 1202
1203 /* Local side had dedicated bonding as requirement */
1204 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1205 return true;
d25e28ab
JH		 1206
1207 /* Remote side had dedicated bonding as requirement */
1208 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1209 return true;
d25e28ab
JH		 1210
1211 /* If none of the above criteria match, then don't store the key
1212 * persistently */
745c0ce3 1213 return false;
d25e28ab
JH		 1214}
1215
c9839a11 1216struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1217{
c9839a11 1218 struct smp_ltk *k;
75d262c2 1219
c9839a11
VCG		 1220 list_for_each_entry(k, &hdev->long_term_keys, list) {
1221 if (k->ediv != ediv ||
a8c5fb1a 1222 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1223 continue;
1224
c9839a11 1225 return k;
75d262c2
VCG		 1226 }
1227
1228 return NULL;
1229}
1230EXPORT_SYMBOL(hci_find_ltk);
1231
c9839a11 1232struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1233 u8 addr_type)
75d262c2 1234{
c9839a11 1235 struct smp_ltk *k;
75d262c2 1236
c9839a11
VCG		 1237 list_for_each_entry(k, &hdev->long_term_keys, list)
1238 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1239 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1240 return k;
1241
1242 return NULL;
1243}
c9839a11 1244EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1245
d25e28ab 1246int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1247 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1248{
1249 struct link_key *key, *old_key;
745c0ce3
VA		 1250 u8 old_key_type;
1251 bool persistent;
55ed8ca1
JH		 1252
1253 old_key = hci_find_link_key(hdev, bdaddr);
1254 if (old_key) {
1255 old_key_type = old_key->type;
1256 key = old_key;
1257 } else {
12adcf3a 1258 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1259 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1260 if (!key)
1261 return -ENOMEM;
1262 list_add(&key->list, &hdev->link_keys);
1263 }
1264
1265 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1266
d25e28ab
JH		 1267 /* Some buggy controller combinations generate a changed
1268 * combination key for legacy pairing even when there's no
1269 * previous key */
1270 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1271 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1272 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1273 if (conn)
1274 conn->key_type = type;
1275 }
d25e28ab 1276
55ed8ca1 1277 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1278 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1279 key->pin_len = pin_len;
1280
b6020ba0 1281 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1282 key->type = old_key_type;
4748fed2
JH		 1283 else
1284 key->type = type;
1285
4df378a1
JH		 1286 if (!new_key)
1287 return 0;
1288
1289 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1290
744cf19e 1291 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1292
6ec5bcad
VA		 1293 if (conn)
1294 conn->flush_key = !persistent;
55ed8ca1
JH		 1295
1296 return 0;
1297}
1298
c9839a11 1299int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1300 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1301 ediv, u8 rand[8])
75d262c2 1302{
c9839a11 1303 struct smp_ltk *key, *old_key;
75d262c2 1304
c9839a11
VCG		 1305 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1306 return 0;
75d262c2 1307
c9839a11
VCG		 1308 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1309 if (old_key)
75d262c2 1310 key = old_key;
c9839a11
VCG		 1311 else {
1312 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1313 if (!key)
1314 return -ENOMEM;
c9839a11 1315 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1316 }
1317
75d262c2 1318 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1319 key->bdaddr_type = addr_type;
1320 memcpy(key->val, tk, sizeof(key->val));
1321 key->authenticated = authenticated;
1322 key->ediv = ediv;
1323 key->enc_size = enc_size;
1324 key->type = type;
1325 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1326
c9839a11
VCG		 1327 if (!new_key)
1328 return 0;
75d262c2 1329
261cc5aa
VCG		 1330 if (type & HCI_SMP_LTK)
1331 mgmt_new_ltk(hdev, key, 1);
1332
75d262c2
VCG		 1333 return 0;
1334}
1335
55ed8ca1
JH		 1336int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1337{
1338 struct link_key *key;
1339
1340 key = hci_find_link_key(hdev, bdaddr);
1341 if (!key)
1342 return -ENOENT;
1343
1344 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1345
1346 list_del(&key->list);
1347 kfree(key);
1348
1349 return 0;
1350}
1351
b899efaf
VCG		 1352int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1353{
1354 struct smp_ltk *k, *tmp;
1355
1356 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1357 if (bacmp(bdaddr, &k->bdaddr))
1358 continue;
1359
1360 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1361
1362 list_del(&k->list);
1363 kfree(k);
1364 }
1365
1366 return 0;
1367}
1368
6bd32326
VT		 1369/* HCI command timer function */
1370static void hci_cmd_timer(unsigned long arg)
1371{
1372 struct hci_dev *hdev = (void *) arg;
1373
1374 BT_ERR("%s command tx timeout", hdev->name);
1375 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1376 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1377}
1378
2763eda6 1379struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1380 bdaddr_t *bdaddr)
2763eda6
SJ		 1381{
1382 struct oob_data *data;
1383
1384 list_for_each_entry(data, &hdev->remote_oob_data, list)
1385 if (bacmp(bdaddr, &data->bdaddr) == 0)
1386 return data;
1387
1388 return NULL;
1389}
1390
1391int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1392{
1393 struct oob_data *data;
1394
1395 data = hci_find_remote_oob_data(hdev, bdaddr);
1396 if (!data)
1397 return -ENOENT;
1398
1399 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1400
1401 list_del(&data->list);
1402 kfree(data);
1403
1404 return 0;
1405}
1406
1407int hci_remote_oob_data_clear(struct hci_dev *hdev)
1408{
1409 struct oob_data *data, *n;
1410
1411 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1412 list_del(&data->list);
1413 kfree(data);
1414 }
1415
1416 return 0;
1417}
1418
1419int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1420 u8 *randomizer)
2763eda6
SJ		 1421{
1422 struct oob_data *data;
1423
1424 data = hci_find_remote_oob_data(hdev, bdaddr);
1425
1426 if (!data) {
1427 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1428 if (!data)
1429 return -ENOMEM;
1430
1431 bacpy(&data->bdaddr, bdaddr);
1432 list_add(&data->list, &hdev->remote_oob_data);
1433 }
1434
1435 memcpy(data->hash, hash, sizeof(data->hash));
1436 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1437
1438 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1439
1440 return 0;
1441}
1442
04124681 1443struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1444{
8035ded4 1445 struct bdaddr_list *b;
b2a66aad 1446
8035ded4 1447 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1448 if (bacmp(bdaddr, &b->bdaddr) == 0)
1449 return b;
b2a66aad
AJ		 1450
1451 return NULL;
1452}
1453
1454int hci_blacklist_clear(struct hci_dev *hdev)
1455{
1456 struct list_head *p, *n;
1457
1458 list_for_each_safe(p, n, &hdev->blacklist) {
1459 struct bdaddr_list *b;
1460
1461 b = list_entry(p, struct bdaddr_list, list);
1462
1463 list_del(p);
1464 kfree(b);
1465 }
1466
1467 return 0;
1468}
1469
88c1fe4b 1470int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1471{
1472 struct bdaddr_list *entry;
b2a66aad
AJ		 1473
1474 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1475 return -EBADF;
1476
5e762444
AJ		 1477 if (hci_blacklist_lookup(hdev, bdaddr))
1478 return -EEXIST;
b2a66aad
AJ		 1479
1480 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1481 if (!entry)
1482 return -ENOMEM;
b2a66aad
AJ		 1483
1484 bacpy(&entry->bdaddr, bdaddr);
1485
1486 list_add(&entry->list, &hdev->blacklist);
1487
88c1fe4b 1488 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1489}
1490
88c1fe4b 1491int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1492{
1493 struct bdaddr_list *entry;
b2a66aad 1494
1ec918ce 1495 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1496 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1497
1498 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1499 if (!entry)
5e762444 1500 return -ENOENT;
b2a66aad
AJ		 1501
1502 list_del(&entry->list);
1503 kfree(entry);
1504
88c1fe4b 1505 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1506}
1507
7ba8b4be
AG		 1508static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1509{
1510 struct le_scan_params *param = (struct le_scan_params *) opt;
1511 struct hci_cp_le_set_scan_param cp;
1512
1513 memset(&cp, 0, sizeof(cp));
1514 cp.type = param->type;
1515 cp.interval = cpu_to_le16(param->interval);
1516 cp.window = cpu_to_le16(param->window);
1517
1518 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1519}
1520
1521static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1522{
1523 struct hci_cp_le_set_scan_enable cp;
1524
1525 memset(&cp, 0, sizeof(cp));
1526 cp.enable = 1;
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
1671 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
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{
fc50744c 1694 struct list_head *head, *p;
b1b813d4 1695 int id, error;
1da177e4 1696
010666a1 1697 if (!hdev->open || !hdev->close)
1da177e4
LT		 1698 return -EINVAL;
1699
fc50744c
UF		 1700 write_lock(&hci_dev_list_lock);
1701
08add513
MM		 1702 /* Do not allow HCI_AMP devices to register at index 0,
1703 * so the index can be used as the AMP controller ID.
1704 */
1705 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
fc50744c 1706 head = &hci_dev_list;
1da177e4
LT		 1707
1708 /* Find first available device id */
1709 list_for_each(p, &hci_dev_list) {
fc50744c
UF		 1710 int nid = list_entry(p, struct hci_dev, list)->id;
1711 if (nid > id)
1da177e4 1712 break;
fc50744c
UF		 1713 if (nid == id)
1714 id++;
1715 head = p;
1da177e4 1716 }
8e87d142 1717
1da177e4
LT		 1718 sprintf(hdev->name, "hci%d", id);
1719 hdev->id = id;
2d8b3a11
AE		 1720
1721 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1722
fc50744c 1723 list_add(&hdev->list, head);
1da177e4 1724
f20d09d5 1725 write_unlock(&hci_dev_list_lock);
1da177e4 1726
32845eb1 1727 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 1728 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1729 if (!hdev->workqueue) {
1730 error = -ENOMEM;
1731 goto err;
1732 }
f48fd9c8 1733
33ca954d
DH		 1734 error = hci_add_sysfs(hdev);
1735 if (error < 0)
1736 goto err_wqueue;
1da177e4 1737
611b30f7 1738 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 1739 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1740 hdev);
611b30f7
MH		 1741 if (hdev->rfkill) {
1742 if (rfkill_register(hdev->rfkill) < 0) {
1743 rfkill_destroy(hdev->rfkill);
1744 hdev->rfkill = NULL;
1745 }
1746 }
1747
a8b2d5c2
JH		 1748 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1749 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1750 schedule_work(&hdev->power_on);
ab81cbf9 1751
1da177e4 1752 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1753 hci_dev_hold(hdev);
1da177e4
LT		 1754
1755 return id;
f48fd9c8 1756
33ca954d
DH		 1757err_wqueue:
1758 destroy_workqueue(hdev->workqueue);
1759err:
f20d09d5 1760 write_lock(&hci_dev_list_lock);
f48fd9c8 1761 list_del(&hdev->list);
f20d09d5 1762 write_unlock(&hci_dev_list_lock);
f48fd9c8 1763
33ca954d 1764 return error;
1da177e4
LT		 1765}
1766EXPORT_SYMBOL(hci_register_dev);
1767
1768/* Unregister HCI device */
59735631 1769void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1770{
ef222013
MH		 1771 int i;
1772
c13854ce 1773 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1774
94324962
JH		 1775 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1776
f20d09d5 1777 write_lock(&hci_dev_list_lock);
1da177e4 1778 list_del(&hdev->list);
f20d09d5 1779 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1780
1781 hci_dev_do_close(hdev);
1782
cd4c5391 1783 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1784 kfree_skb(hdev->reassembly[i]);
1785
ab81cbf9 1786 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 1787 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1788 hci_dev_lock(hdev);
744cf19e 1789 mgmt_index_removed(hdev);
09fd0de5 1790 hci_dev_unlock(hdev);
56e5cb86 1791 }
ab81cbf9 1792
2e58ef3e
JH		 1793 /* mgmt_index_removed should take care of emptying the
1794 * pending list */
1795 BUG_ON(!list_empty(&hdev->mgmt_pending));
1796
1da177e4
LT		 1797 hci_notify(hdev, HCI_DEV_UNREG);
1798
611b30f7
MH		 1799 if (hdev->rfkill) {
1800 rfkill_unregister(hdev->rfkill);
1801 rfkill_destroy(hdev->rfkill);
1802 }
1803
ce242970 1804 hci_del_sysfs(hdev);
147e2d59 1805
f48fd9c8
MH		 1806 destroy_workqueue(hdev->workqueue);
1807
09fd0de5 1808 hci_dev_lock(hdev);
e2e0cacb 1809 hci_blacklist_clear(hdev);
2aeb9a1a 1810 hci_uuids_clear(hdev);
55ed8ca1 1811 hci_link_keys_clear(hdev);
b899efaf 1812 hci_smp_ltks_clear(hdev);
2763eda6 1813 hci_remote_oob_data_clear(hdev);
09fd0de5 1814 hci_dev_unlock(hdev);
e2e0cacb 1815
dc946bd8 1816 hci_dev_put(hdev);
1da177e4
LT		 1817}
1818EXPORT_SYMBOL(hci_unregister_dev);
1819
1820/* Suspend HCI device */
1821int hci_suspend_dev(struct hci_dev *hdev)
1822{
1823 hci_notify(hdev, HCI_DEV_SUSPEND);
1824 return 0;
1825}
1826EXPORT_SYMBOL(hci_suspend_dev);
1827
1828/* Resume HCI device */
1829int hci_resume_dev(struct hci_dev *hdev)
1830{
1831 hci_notify(hdev, HCI_DEV_RESUME);
1832 return 0;
1833}
1834EXPORT_SYMBOL(hci_resume_dev);
1835
76bca880
MH		 1836/* Receive frame from HCI drivers */
1837int hci_recv_frame(struct sk_buff *skb)
1838{
1839 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1840 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 1841 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 1842 kfree_skb(skb);
1843 return -ENXIO;
1844 }
1845
1846 /* Incomming skb */
1847 bt_cb(skb)->incoming = 1;
1848
1849 /* Time stamp */
1850 __net_timestamp(skb);
1851
76bca880 1852 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1853 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1854
76bca880
MH		 1855 return 0;
1856}
1857EXPORT_SYMBOL(hci_recv_frame);
1858
33e882a5 1859static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 1860 int count, __u8 index)
33e882a5
SS		 1861{
1862 int len = 0;
1863 int hlen = 0;
1864 int remain = count;
1865 struct sk_buff *skb;
1866 struct bt_skb_cb *scb;
1867
1868 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 1869 index >= NUM_REASSEMBLY)
33e882a5
SS		 1870 return -EILSEQ;
1871
1872 skb = hdev->reassembly[index];
1873
1874 if (!skb) {
1875 switch (type) {
1876 case HCI_ACLDATA_PKT:
1877 len = HCI_MAX_FRAME_SIZE;
1878 hlen = HCI_ACL_HDR_SIZE;
1879 break;
1880 case HCI_EVENT_PKT:
1881 len = HCI_MAX_EVENT_SIZE;
1882 hlen = HCI_EVENT_HDR_SIZE;
1883 break;
1884 case HCI_SCODATA_PKT:
1885 len = HCI_MAX_SCO_SIZE;
1886 hlen = HCI_SCO_HDR_SIZE;
1887 break;
1888 }
1889
1e429f38 1890 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1891 if (!skb)
1892 return -ENOMEM;
1893
1894 scb = (void *) skb->cb;
1895 scb->expect = hlen;
1896 scb->pkt_type = type;
1897
1898 skb->dev = (void *) hdev;
1899 hdev->reassembly[index] = skb;
1900 }
1901
1902 while (count) {
1903 scb = (void *) skb->cb;
89bb46d0 1904 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1905
1906 memcpy(skb_put(skb, len), data, len);
1907
1908 count -= len;
1909 data += len;
1910 scb->expect -= len;
1911 remain = count;
1912
1913 switch (type) {
1914 case HCI_EVENT_PKT:
1915 if (skb->len == HCI_EVENT_HDR_SIZE) {
1916 struct hci_event_hdr *h = hci_event_hdr(skb);
1917 scb->expect = h->plen;
1918
1919 if (skb_tailroom(skb) < scb->expect) {
1920 kfree_skb(skb);
1921 hdev->reassembly[index] = NULL;
1922 return -ENOMEM;
1923 }
1924 }
1925 break;
1926
1927 case HCI_ACLDATA_PKT:
1928 if (skb->len == HCI_ACL_HDR_SIZE) {
1929 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1930 scb->expect = __le16_to_cpu(h->dlen);
1931
1932 if (skb_tailroom(skb) < scb->expect) {
1933 kfree_skb(skb);
1934 hdev->reassembly[index] = NULL;
1935 return -ENOMEM;
1936 }
1937 }
1938 break;
1939
1940 case HCI_SCODATA_PKT:
1941 if (skb->len == HCI_SCO_HDR_SIZE) {
1942 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1943 scb->expect = h->dlen;
1944
1945 if (skb_tailroom(skb) < scb->expect) {
1946 kfree_skb(skb);
1947 hdev->reassembly[index] = NULL;
1948 return -ENOMEM;
1949 }
1950 }
1951 break;
1952 }
1953
1954 if (scb->expect == 0) {
1955 /* Complete frame */
1956
1957 bt_cb(skb)->pkt_type = type;
1958 hci_recv_frame(skb);
1959
1960 hdev->reassembly[index] = NULL;
1961 return remain;
1962 }
1963 }
1964
1965 return remain;
1966}
1967
ef222013
MH		 1968int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1969{
f39a3c06
SS		 1970 int rem = 0;
1971
ef222013
MH		 1972 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1973 return -EILSEQ;
1974
da5f6c37 1975 while (count) {
1e429f38 1976 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1977 if (rem < 0)
1978 return rem;
ef222013 1979
f39a3c06
SS		 1980 data += (count - rem);
1981 count = rem;
f81c6224 1982 }
ef222013 1983
f39a3c06 1984 return rem;
ef222013
MH		 1985}
1986EXPORT_SYMBOL(hci_recv_fragment);
1987
99811510
SS		 1988#define STREAM_REASSEMBLY 0
1989
1990int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1991{
1992 int type;
1993 int rem = 0;
1994
da5f6c37 1995 while (count) {
99811510
SS		 1996 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1997
1998 if (!skb) {
1999 struct { char type; } *pkt;
2000
2001 /* Start of the frame */
2002 pkt = data;
2003 type = pkt->type;
2004
2005 data++;
2006 count--;
2007 } else
2008 type = bt_cb(skb)->pkt_type;
2009
1e429f38 2010 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2011 STREAM_REASSEMBLY);
99811510
SS		 2012 if (rem < 0)
2013 return rem;
2014
2015 data += (count - rem);
2016 count = rem;
f81c6224 2017 }
99811510
SS		 2018
2019 return rem;
2020}
2021EXPORT_SYMBOL(hci_recv_stream_fragment);
2022
1da177e4
LT		 2023/* ---- Interface to upper protocols ---- */
2024
1da177e4
LT		 2025int hci_register_cb(struct hci_cb *cb)
2026{
2027 BT_DBG("%p name %s", cb, cb->name);
2028
f20d09d5 2029 write_lock(&hci_cb_list_lock);
1da177e4 2030 list_add(&cb->list, &hci_cb_list);
f20d09d5 2031 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2032
2033 return 0;
2034}
2035EXPORT_SYMBOL(hci_register_cb);
2036
2037int hci_unregister_cb(struct hci_cb *cb)
2038{
2039 BT_DBG("%p name %s", cb, cb->name);
2040
f20d09d5 2041 write_lock(&hci_cb_list_lock);
1da177e4 2042 list_del(&cb->list);
f20d09d5 2043 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2044
2045 return 0;
2046}
2047EXPORT_SYMBOL(hci_unregister_cb);
2048
2049static int hci_send_frame(struct sk_buff *skb)
2050{
2051 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2052
2053 if (!hdev) {
2054 kfree_skb(skb);
2055 return -ENODEV;
2056 }
2057
0d48d939 2058 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2059
cd82e61c
MH		 2060 /* Time stamp */
2061 __net_timestamp(skb);
1da177e4 2062
cd82e61c
MH		 2063 /* Send copy to monitor */
2064 hci_send_to_monitor(hdev, skb);
2065
2066 if (atomic_read(&hdev->promisc)) {
2067 /* Send copy to the sockets */
470fe1b5 2068 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2069 }
2070
2071 /* Get rid of skb owner, prior to sending to the driver. */
2072 skb_orphan(skb);
2073
2074 return hdev->send(skb);
2075}
2076
2077/* Send HCI command */
a9de9248 2078int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2079{
2080 int len = HCI_COMMAND_HDR_SIZE + plen;
2081 struct hci_command_hdr *hdr;
2082 struct sk_buff *skb;
2083
a9de9248 2084 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2085
2086 skb = bt_skb_alloc(len, GFP_ATOMIC);
2087 if (!skb) {
ef222013 2088 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2089 return -ENOMEM;
2090 }
2091
2092 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2093 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2094 hdr->plen = plen;
2095
2096 if (plen)
2097 memcpy(skb_put(skb, plen), param, plen);
2098
2099 BT_DBG("skb len %d", skb->len);
2100
0d48d939 2101 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2102 skb->dev = (void *) hdev;
c78ae283 2103
a5040efa
JH		 2104 if (test_bit(HCI_INIT, &hdev->flags))
2105 hdev->init_last_cmd = opcode;
2106
1da177e4 2107 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2108 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2109
2110 return 0;
2111}
1da177e4
LT		 2112
2113/* Get data from the previously sent command */
a9de9248 2114void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2115{
2116 struct hci_command_hdr *hdr;
2117
2118 if (!hdev->sent_cmd)
2119 return NULL;
2120
2121 hdr = (void *) hdev->sent_cmd->data;
2122
a9de9248 2123 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2124 return NULL;
2125
a9de9248 2126 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2127
2128 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2129}
2130
2131/* Send ACL data */
2132static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2133{
2134 struct hci_acl_hdr *hdr;
2135 int len = skb->len;
2136
badff6d0
ACM		 2137 skb_push(skb, HCI_ACL_HDR_SIZE);
2138 skb_reset_transport_header(skb);
9c70220b 2139 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2140 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2141 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2142}
2143
73d80deb 2144static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
a8c5fb1a 2145 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2146{
2147 struct hci_dev *hdev = conn->hdev;
2148 struct sk_buff *list;
2149
087bfd99
GP		 2150 skb->len = skb_headlen(skb);
2151 skb->data_len = 0;
2152
2153 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2154 hci_add_acl_hdr(skb, conn->handle, flags);
2155
70f23020
AE		 2156 list = skb_shinfo(skb)->frag_list;
2157 if (!list) {
1da177e4
LT		 2158 /* Non fragmented */
2159 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2160
73d80deb 2161 skb_queue_tail(queue, skb);
1da177e4
LT		 2162 } else {
2163 /* Fragmented */
2164 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2165
2166 skb_shinfo(skb)->frag_list = NULL;
2167
2168 /* Queue all fragments atomically */
af3e6359 2169 spin_lock(&queue->lock);
1da177e4 2170
73d80deb 2171 __skb_queue_tail(queue, skb);
e702112f
AE		 2172
2173 flags &= ~ACL_START;
2174 flags |= ACL_CONT;
1da177e4
LT		 2175 do {
2176 skb = list; list = list->next;
8e87d142 2177
1da177e4 2178 skb->dev = (void *) hdev;
0d48d939 2179 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2180 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2181
2182 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2183
73d80deb 2184 __skb_queue_tail(queue, skb);
1da177e4
LT		 2185 } while (list);
2186
af3e6359 2187 spin_unlock(&queue->lock);
1da177e4 2188 }
73d80deb
LAD		 2189}
2190
2191void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2192{
2193 struct hci_conn *conn = chan->conn;
2194 struct hci_dev *hdev = conn->hdev;
2195
2196 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2197
2198 skb->dev = (void *) hdev;
73d80deb
LAD		 2199
2200 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2201
3eff45ea 2202 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2203}
2204EXPORT_SYMBOL(hci_send_acl);
2205
2206/* Send SCO data */
0d861d8b 2207void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2208{
2209 struct hci_dev *hdev = conn->hdev;
2210 struct hci_sco_hdr hdr;
2211
2212 BT_DBG("%s len %d", hdev->name, skb->len);
2213
aca3192c 2214 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2215 hdr.dlen = skb->len;
2216
badff6d0
ACM		 2217 skb_push(skb, HCI_SCO_HDR_SIZE);
2218 skb_reset_transport_header(skb);
9c70220b 2219 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2220
2221 skb->dev = (void *) hdev;
0d48d939 2222 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2223
1da177e4 2224 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2225 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2226}
2227EXPORT_SYMBOL(hci_send_sco);
2228
2229/* ---- HCI TX task (outgoing data) ---- */
2230
2231/* HCI Connection scheduler */
6039aa73
GP		 2232static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2233 int *quote)
1da177e4
LT		 2234{
2235 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2236 struct hci_conn *conn = NULL, *c;
abc5de8f 2237 unsigned int num = 0, min = ~0;
1da177e4 2238
8e87d142 2239 /* We don't have to lock device here. Connections are always
1da177e4 2240 * added and removed with TX task disabled. */
bf4c6325
GP		 2241
2242 rcu_read_lock();
2243
2244 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2245 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2246 continue;
769be974
MH		 2247
2248 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2249 continue;
2250
1da177e4
LT		 2251 num++;
2252
2253 if (c->sent < min) {
2254 min = c->sent;
2255 conn = c;
2256 }
52087a79
LAD		 2257
2258 if (hci_conn_num(hdev, type) == num)
2259 break;
1da177e4
LT		 2260 }
2261
bf4c6325
GP		 2262 rcu_read_unlock();
2263
1da177e4 2264 if (conn) {
6ed58ec5
VT		 2265 int cnt, q;
2266
2267 switch (conn->type) {
2268 case ACL_LINK:
2269 cnt = hdev->acl_cnt;
2270 break;
2271 case SCO_LINK:
2272 case ESCO_LINK:
2273 cnt = hdev->sco_cnt;
2274 break;
2275 case LE_LINK:
2276 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2277 break;
2278 default:
2279 cnt = 0;
2280 BT_ERR("Unknown link type");
2281 }
2282
2283 q = cnt / num;
1da177e4
LT		 2284 *quote = q ? q : 1;
2285 } else
2286 *quote = 0;
2287
2288 BT_DBG("conn %p quote %d", conn, *quote);
2289 return conn;
2290}
2291
6039aa73 2292static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2293{
2294 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2295 struct hci_conn *c;
1da177e4 2296
bae1f5d9 2297 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2298
bf4c6325
GP		 2299 rcu_read_lock();
2300
1da177e4 2301 /* Kill stalled connections */
bf4c6325 2302 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2303 if (c->type == type && c->sent) {
2304 BT_ERR("%s killing stalled connection %s",
a8c5fb1a 2305 hdev->name, batostr(&c->dst));
1da177e4
LT		 2306 hci_acl_disconn(c, 0x13);
2307 }
2308 }
bf4c6325
GP		 2309
2310 rcu_read_unlock();
1da177e4
LT		 2311}
2312
6039aa73
GP		 2313static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2314 int *quote)
1da177e4 2315{
73d80deb
LAD		 2316 struct hci_conn_hash *h = &hdev->conn_hash;
2317 struct hci_chan *chan = NULL;
abc5de8f 2318 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2319 struct hci_conn *conn;
73d80deb
LAD		 2320 int cnt, q, conn_num = 0;
2321
2322 BT_DBG("%s", hdev->name);
2323
bf4c6325
GP		 2324 rcu_read_lock();
2325
2326 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2327 struct hci_chan *tmp;
2328
2329 if (conn->type != type)
2330 continue;
2331
2332 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2333 continue;
2334
2335 conn_num++;
2336
8192edef 2337 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2338 struct sk_buff *skb;
2339
2340 if (skb_queue_empty(&tmp->data_q))
2341 continue;
2342
2343 skb = skb_peek(&tmp->data_q);
2344 if (skb->priority < cur_prio)
2345 continue;
2346
2347 if (skb->priority > cur_prio) {
2348 num = 0;
2349 min = ~0;
2350 cur_prio = skb->priority;
2351 }
2352
2353 num++;
2354
2355 if (conn->sent < min) {
2356 min = conn->sent;
2357 chan = tmp;
2358 }
2359 }
2360
2361 if (hci_conn_num(hdev, type) == conn_num)
2362 break;
2363 }
2364
bf4c6325
GP		 2365 rcu_read_unlock();
2366
73d80deb
LAD		 2367 if (!chan)
2368 return NULL;
2369
2370 switch (chan->conn->type) {
2371 case ACL_LINK:
2372 cnt = hdev->acl_cnt;
2373 break;
2374 case SCO_LINK:
2375 case ESCO_LINK:
2376 cnt = hdev->sco_cnt;
2377 break;
2378 case LE_LINK:
2379 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2380 break;
2381 default:
2382 cnt = 0;
2383 BT_ERR("Unknown link type");
2384 }
2385
2386 q = cnt / num;
2387 *quote = q ? q : 1;
2388 BT_DBG("chan %p quote %d", chan, *quote);
2389 return chan;
2390}
2391
02b20f0b
LAD		 2392static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2393{
2394 struct hci_conn_hash *h = &hdev->conn_hash;
2395 struct hci_conn *conn;
2396 int num = 0;
2397
2398 BT_DBG("%s", hdev->name);
2399
bf4c6325
GP		 2400 rcu_read_lock();
2401
2402 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2403 struct hci_chan *chan;
2404
2405 if (conn->type != type)
2406 continue;
2407
2408 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2409 continue;
2410
2411 num++;
2412
8192edef 2413 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2414 struct sk_buff *skb;
2415
2416 if (chan->sent) {
2417 chan->sent = 0;
2418 continue;
2419 }
2420
2421 if (skb_queue_empty(&chan->data_q))
2422 continue;
2423
2424 skb = skb_peek(&chan->data_q);
2425 if (skb->priority >= HCI_PRIO_MAX - 1)
2426 continue;
2427
2428 skb->priority = HCI_PRIO_MAX - 1;
2429
2430 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2431 skb->priority);
02b20f0b
LAD		 2432 }
2433
2434 if (hci_conn_num(hdev, type) == num)
2435 break;
2436 }
bf4c6325
GP		 2437
2438 rcu_read_unlock();
2439
02b20f0b
LAD		 2440}
2441
b71d385a
AE		 2442static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2443{
2444 /* Calculate count of blocks used by this packet */
2445 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2446}
2447
6039aa73 2448static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2449{
1da177e4
LT		 2450 if (!test_bit(HCI_RAW, &hdev->flags)) {
2451 /* ACL tx timeout must be longer than maximum
2452 * link supervision timeout (40.9 seconds) */
63d2bc1b 2453 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
a8c5fb1a 2454 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2455 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2456 }
63d2bc1b 2457}
1da177e4 2458
6039aa73 2459static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 2460{
2461 unsigned int cnt = hdev->acl_cnt;
2462 struct hci_chan *chan;
2463 struct sk_buff *skb;
2464 int quote;
2465
2466 __check_timeout(hdev, cnt);
04837f64 2467
73d80deb 2468 while (hdev->acl_cnt &&
a8c5fb1a 2469 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2470 u32 priority = (skb_peek(&chan->data_q))->priority;
2471 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2472 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2473 skb->len, skb->priority);
73d80deb 2474
ec1cce24
LAD		 2475 /* Stop if priority has changed */
2476 if (skb->priority < priority)
2477 break;
2478
2479 skb = skb_dequeue(&chan->data_q);
2480
73d80deb 2481 hci_conn_enter_active_mode(chan->conn,
04124681 2482 bt_cb(skb)->force_active);
04837f64 2483
1da177e4
LT		 2484 hci_send_frame(skb);
2485 hdev->acl_last_tx = jiffies;
2486
2487 hdev->acl_cnt--;
73d80deb
LAD		 2488 chan->sent++;
2489 chan->conn->sent++;
1da177e4
LT		 2490 }
2491 }
02b20f0b
LAD		 2492
2493 if (cnt != hdev->acl_cnt)
2494 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2495}
2496
6039aa73 2497static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 2498{
63d2bc1b 2499 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2500 struct hci_chan *chan;
2501 struct sk_buff *skb;
2502 int quote;
b71d385a 2503
63d2bc1b 2504 __check_timeout(hdev, cnt);
b71d385a
AE		 2505
2506 while (hdev->block_cnt > 0 &&
a8c5fb1a 2507 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
b71d385a
AE		 2508 u32 priority = (skb_peek(&chan->data_q))->priority;
2509 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2510 int blocks;
2511
2512 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2513 skb->len, skb->priority);
b71d385a
AE		 2514
2515 /* Stop if priority has changed */
2516 if (skb->priority < priority)
2517 break;
2518
2519 skb = skb_dequeue(&chan->data_q);
2520
2521 blocks = __get_blocks(hdev, skb);
2522 if (blocks > hdev->block_cnt)
2523 return;
2524
2525 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2526 bt_cb(skb)->force_active);
b71d385a
AE		 2527
2528 hci_send_frame(skb);
2529 hdev->acl_last_tx = jiffies;
2530
2531 hdev->block_cnt -= blocks;
2532 quote -= blocks;
2533
2534 chan->sent += blocks;
2535 chan->conn->sent += blocks;
2536 }
2537 }
2538
2539 if (cnt != hdev->block_cnt)
2540 hci_prio_recalculate(hdev, ACL_LINK);
2541}
2542
6039aa73 2543static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 2544{
2545 BT_DBG("%s", hdev->name);
2546
2547 if (!hci_conn_num(hdev, ACL_LINK))
2548 return;
2549
2550 switch (hdev->flow_ctl_mode) {
2551 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2552 hci_sched_acl_pkt(hdev);
2553 break;
2554
2555 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2556 hci_sched_acl_blk(hdev);
2557 break;
2558 }
2559}
2560
1da177e4 2561/* Schedule SCO */
6039aa73 2562static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 2563{
2564 struct hci_conn *conn;
2565 struct sk_buff *skb;
2566 int quote;
2567
2568 BT_DBG("%s", hdev->name);
2569
52087a79
LAD		 2570 if (!hci_conn_num(hdev, SCO_LINK))
2571 return;
2572
1da177e4
LT		 2573 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2574 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2575 BT_DBG("skb %p len %d", skb, skb->len);
2576 hci_send_frame(skb);
2577
2578 conn->sent++;
2579 if (conn->sent == ~0)
2580 conn->sent = 0;
2581 }
2582 }
2583}
2584
6039aa73 2585static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 2586{
2587 struct hci_conn *conn;
2588 struct sk_buff *skb;
2589 int quote;
2590
2591 BT_DBG("%s", hdev->name);
2592
52087a79
LAD		 2593 if (!hci_conn_num(hdev, ESCO_LINK))
2594 return;
2595
8fc9ced3
GP		 2596 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2597 &quote))) {
b6a0dc82
MH		 2598 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2599 BT_DBG("skb %p len %d", skb, skb->len);
2600 hci_send_frame(skb);
2601
2602 conn->sent++;
2603 if (conn->sent == ~0)
2604 conn->sent = 0;
2605 }
2606 }
2607}
2608
6039aa73 2609static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 2610{
73d80deb 2611 struct hci_chan *chan;
6ed58ec5 2612 struct sk_buff *skb;
02b20f0b 2613 int quote, cnt, tmp;
6ed58ec5
VT		 2614
2615 BT_DBG("%s", hdev->name);
2616
52087a79
LAD		 2617 if (!hci_conn_num(hdev, LE_LINK))
2618 return;
2619
6ed58ec5
VT		 2620 if (!test_bit(HCI_RAW, &hdev->flags)) {
2621 /* LE tx timeout must be longer than maximum
2622 * link supervision timeout (40.9 seconds) */
bae1f5d9 2623 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 2624 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2625 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2626 }
2627
2628 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2629 tmp = cnt;
73d80deb 2630 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2631 u32 priority = (skb_peek(&chan->data_q))->priority;
2632 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2633 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2634 skb->len, skb->priority);
6ed58ec5 2635
ec1cce24
LAD		 2636 /* Stop if priority has changed */
2637 if (skb->priority < priority)
2638 break;
2639
2640 skb = skb_dequeue(&chan->data_q);
2641
6ed58ec5
VT		 2642 hci_send_frame(skb);
2643 hdev->le_last_tx = jiffies;
2644
2645 cnt--;
73d80deb
LAD		 2646 chan->sent++;
2647 chan->conn->sent++;
6ed58ec5
VT		 2648 }
2649 }
73d80deb 2650
6ed58ec5
VT		 2651 if (hdev->le_pkts)
2652 hdev->le_cnt = cnt;
2653 else
2654 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2655
2656 if (cnt != tmp)
2657 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2658}
2659
3eff45ea 2660static void hci_tx_work(struct work_struct *work)
1da177e4 2661{
3eff45ea 2662 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2663 struct sk_buff *skb;
2664
6ed58ec5 2665 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 2666 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2667
2668 /* Schedule queues and send stuff to HCI driver */
2669
2670 hci_sched_acl(hdev);
2671
2672 hci_sched_sco(hdev);
2673
b6a0dc82
MH		 2674 hci_sched_esco(hdev);
2675
6ed58ec5
VT		 2676 hci_sched_le(hdev);
2677
1da177e4
LT		 2678 /* Send next queued raw (unknown type) packet */
2679 while ((skb = skb_dequeue(&hdev->raw_q)))
2680 hci_send_frame(skb);
1da177e4
LT		 2681}
2682
25985edc 2683/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2684
2685/* ACL data packet */
6039aa73 2686static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2687{
2688 struct hci_acl_hdr *hdr = (void *) skb->data;
2689 struct hci_conn *conn;
2690 __u16 handle, flags;
2691
2692 skb_pull(skb, HCI_ACL_HDR_SIZE);
2693
2694 handle = __le16_to_cpu(hdr->handle);
2695 flags = hci_flags(handle);
2696 handle = hci_handle(handle);
2697
a8c5fb1a
GP		 2698 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len,
2699 handle, flags);
1da177e4
LT		 2700
2701 hdev->stat.acl_rx++;
2702
2703 hci_dev_lock(hdev);
2704 conn = hci_conn_hash_lookup_handle(hdev, handle);
2705 hci_dev_unlock(hdev);
8e87d142 2706
1da177e4 2707 if (conn) {
65983fc7 2708 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2709
671267bf
JH		 2710 hci_dev_lock(hdev);
2711 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2712 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2713 mgmt_device_connected(hdev, &conn->dst, conn->type,
2714 conn->dst_type, 0, NULL, 0,
2715 conn->dev_class);
2716 hci_dev_unlock(hdev);
2717
1da177e4 2718 /* Send to upper protocol */
686ebf28
UF		 2719 l2cap_recv_acldata(conn, skb, flags);
2720 return;
1da177e4 2721 } else {
8e87d142 2722 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 2723 hdev->name, handle);
1da177e4
LT		 2724 }
2725
2726 kfree_skb(skb);
2727}
2728
2729/* SCO data packet */
6039aa73 2730static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2731{
2732 struct hci_sco_hdr *hdr = (void *) skb->data;
2733 struct hci_conn *conn;
2734 __u16 handle;
2735
2736 skb_pull(skb, HCI_SCO_HDR_SIZE);
2737
2738 handle = __le16_to_cpu(hdr->handle);
2739
2740 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2741
2742 hdev->stat.sco_rx++;
2743
2744 hci_dev_lock(hdev);
2745 conn = hci_conn_hash_lookup_handle(hdev, handle);
2746 hci_dev_unlock(hdev);
2747
2748 if (conn) {
1da177e4 2749 /* Send to upper protocol */
686ebf28
UF		 2750 sco_recv_scodata(conn, skb);
2751 return;
1da177e4 2752 } else {
8e87d142 2753 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 2754 hdev->name, handle);
1da177e4
LT		 2755 }
2756
2757 kfree_skb(skb);
2758}
2759
b78752cc 2760static void hci_rx_work(struct work_struct *work)
1da177e4 2761{
b78752cc 2762 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2763 struct sk_buff *skb;
2764
2765 BT_DBG("%s", hdev->name);
2766
1da177e4 2767 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2768 /* Send copy to monitor */
2769 hci_send_to_monitor(hdev, skb);
2770
1da177e4
LT		 2771 if (atomic_read(&hdev->promisc)) {
2772 /* Send copy to the sockets */
470fe1b5 2773 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2774 }
2775
2776 if (test_bit(HCI_RAW, &hdev->flags)) {
2777 kfree_skb(skb);
2778 continue;
2779 }
2780
2781 if (test_bit(HCI_INIT, &hdev->flags)) {
2782 /* Don't process data packets in this states. */
0d48d939 2783 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2784 case HCI_ACLDATA_PKT:
2785 case HCI_SCODATA_PKT:
2786 kfree_skb(skb);
2787 continue;
3ff50b79 2788 }
1da177e4
LT		 2789 }
2790
2791 /* Process frame */
0d48d939 2792 switch (bt_cb(skb)->pkt_type) {
1da177e4 2793 case HCI_EVENT_PKT:
b78752cc 2794 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2795 hci_event_packet(hdev, skb);
2796 break;
2797
2798 case HCI_ACLDATA_PKT:
2799 BT_DBG("%s ACL data packet", hdev->name);
2800 hci_acldata_packet(hdev, skb);
2801 break;
2802
2803 case HCI_SCODATA_PKT:
2804 BT_DBG("%s SCO data packet", hdev->name);
2805 hci_scodata_packet(hdev, skb);
2806 break;
2807
2808 default:
2809 kfree_skb(skb);
2810 break;
2811 }
2812 }
1da177e4
LT		 2813}
2814
c347b765 2815static void hci_cmd_work(struct work_struct *work)
1da177e4 2816{
c347b765 2817 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2818 struct sk_buff *skb;
2819
2820 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2821
1da177e4 2822 /* Send queued commands */
5a08ecce
AE		 2823 if (atomic_read(&hdev->cmd_cnt)) {
2824 skb = skb_dequeue(&hdev->cmd_q);
2825 if (!skb)
2826 return;
2827
7585b97a 2828 kfree_skb(hdev->sent_cmd);
1da177e4 2829
70f23020
AE		 2830 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2831 if (hdev->sent_cmd) {
1da177e4
LT		 2832 atomic_dec(&hdev->cmd_cnt);
2833 hci_send_frame(skb);
7bdb8a5c
SJ		 2834 if (test_bit(HCI_RESET, &hdev->flags))
2835 del_timer(&hdev->cmd_timer);
2836 else
2837 mod_timer(&hdev->cmd_timer,
6bd32326 2838 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2839 } else {
2840 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2841 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2842 }
2843 }
2844}
2519a1fc
AG		 2845
2846int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2847{
2848 /* General inquiry access code (GIAC) */
2849 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2850 struct hci_cp_inquiry cp;
2851
2852 BT_DBG("%s", hdev->name);
2853
2854 if (test_bit(HCI_INQUIRY, &hdev->flags))
2855 return -EINPROGRESS;
2856
4663262c
JH		 2857 inquiry_cache_flush(hdev);
2858
2519a1fc
AG		 2859 memset(&cp, 0, sizeof(cp));
2860 memcpy(&cp.lap, lap, sizeof(cp.lap));
2861 cp.length = length;
2862
2863 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2864}
023d5049
AG		 2865
2866int hci_cancel_inquiry(struct hci_dev *hdev)
2867{
2868 BT_DBG("%s", hdev->name);
2869
2870 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2871 return -EALREADY;
023d5049
AG		 2872
2873 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2874}
31f7956c
AG		 2875
2876u8 bdaddr_to_le(u8 bdaddr_type)
2877{
2878 switch (bdaddr_type) {
2879 case BDADDR_LE_PUBLIC:
2880 return ADDR_LE_DEV_PUBLIC;
2881
2882 default:
2883 /* Fallback to LE Random address type */
2884 return ADDR_LE_DEV_RANDOM;
2885 }
2886}
Linux kernel - Deliverables
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