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Bluetooth: Only keep controller up after init if powered on
[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
82453021 28#include <linux/jiffies.h>
1da177e4
LT		 29#include <linux/module.h>
30#include <linux/kmod.h>
31
32#include <linux/types.h>
33#include <linux/errno.h>
34#include <linux/kernel.h>
1da177e4
LT		 35#include <linux/sched.h>
36#include <linux/slab.h>
37#include <linux/poll.h>
38#include <linux/fcntl.h>
39#include <linux/init.h>
40#include <linux/skbuff.h>
f48fd9c8 41#include <linux/workqueue.h>
1da177e4 42#include <linux/interrupt.h>
611b30f7 43#include <linux/rfkill.h>
6bd32326 44#include <linux/timer.h>
3a0259bb 45#include <linux/crypto.h>
1da177e4
LT		 46#include <net/sock.h>
47
48#include <asm/system.h>
70f23020 49#include <linux/uaccess.h>
1da177e4
LT		 50#include <asm/unaligned.h>
51
52#include <net/bluetooth/bluetooth.h>
53#include <net/bluetooth/hci_core.h>
54
ab81cbf9
JH		 55#define AUTO_OFF_TIMEOUT 2000
56
b78752cc 57static void hci_rx_work(struct work_struct *work);
c347b765 58static void hci_cmd_work(struct work_struct *work);
3eff45ea 59static void hci_tx_work(struct work_struct *work);
1da177e4 60
1da177e4
LT		 61/* HCI device list */
62LIST_HEAD(hci_dev_list);
63DEFINE_RWLOCK(hci_dev_list_lock);
64
65/* HCI callback list */
66LIST_HEAD(hci_cb_list);
67DEFINE_RWLOCK(hci_cb_list_lock);
68
1da177e4
LT		 69/* ---- HCI notifications ---- */
70
6516455d 71static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 72{
040030ef 73 hci_sock_dev_event(hdev, event);
1da177e4
LT		 74}
75
76/* ---- HCI requests ---- */
77
23bb5763 78void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 79{
23bb5763
JH		 80 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
81
a5040efa
JH		 82 /* If this is the init phase check if the completed command matches
83 * the last init command, and if not just return.
84 */
85 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
23bb5763 86 return;
1da177e4
LT		 87
88 if (hdev->req_status == HCI_REQ_PEND) {
89 hdev->req_result = result;
90 hdev->req_status = HCI_REQ_DONE;
91 wake_up_interruptible(&hdev->req_wait_q);
92 }
93}
94
95static void hci_req_cancel(struct hci_dev *hdev, int err)
96{
97 BT_DBG("%s err 0x%2.2x", hdev->name, err);
98
99 if (hdev->req_status == HCI_REQ_PEND) {
100 hdev->req_result = err;
101 hdev->req_status = HCI_REQ_CANCELED;
102 wake_up_interruptible(&hdev->req_wait_q);
103 }
104}
105
106/* Execute request and wait for completion. */
8e87d142 107static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 108 unsigned long opt, __u32 timeout)
1da177e4
LT		 109{
110 DECLARE_WAITQUEUE(wait, current);
111 int err = 0;
112
113 BT_DBG("%s start", hdev->name);
114
115 hdev->req_status = HCI_REQ_PEND;
116
117 add_wait_queue(&hdev->req_wait_q, &wait);
118 set_current_state(TASK_INTERRUPTIBLE);
119
120 req(hdev, opt);
121 schedule_timeout(timeout);
122
123 remove_wait_queue(&hdev->req_wait_q, &wait);
124
125 if (signal_pending(current))
126 return -EINTR;
127
128 switch (hdev->req_status) {
129 case HCI_REQ_DONE:
e175072f 130 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 131 break;
132
133 case HCI_REQ_CANCELED:
134 err = -hdev->req_result;
135 break;
136
137 default:
138 err = -ETIMEDOUT;
139 break;
3ff50b79 140 }
1da177e4 141
a5040efa 142 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 143
144 BT_DBG("%s end: err %d", hdev->name, err);
145
146 return err;
147}
148
149static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 150 unsigned long opt, __u32 timeout)
1da177e4
LT		 151{
152 int ret;
153
7c6a329e
MH		 154 if (!test_bit(HCI_UP, &hdev->flags))
155 return -ENETDOWN;
156
1da177e4
LT		 157 /* Serialize all requests */
158 hci_req_lock(hdev);
159 ret = __hci_request(hdev, req, opt, timeout);
160 hci_req_unlock(hdev);
161
162 return ret;
163}
164
165static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
166{
167 BT_DBG("%s %ld", hdev->name, opt);
168
169 /* Reset device */
f630cf0d 170 set_bit(HCI_RESET, &hdev->flags);
a9de9248 171 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 172}
173
e61ef499 174static void bredr_init(struct hci_dev *hdev)
1da177e4 175{
b0916ea0 176 struct hci_cp_delete_stored_link_key cp;
1ebb9252 177 __le16 param;
89f2783d 178 __u8 flt_type;
1da177e4 179
2455a3ea
AE		 180 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
181
1da177e4
LT		 182 /* Mandatory initialization */
183
184 /* Reset */
f630cf0d 185 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
e61ef499
AE		 186 set_bit(HCI_RESET, &hdev->flags);
187 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 188 }
1da177e4
LT		 189
190 /* Read Local Supported Features */
a9de9248 191 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 192
1143e5a6 193 /* Read Local Version */
a9de9248 194 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 195
1da177e4 196 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 197 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 198
1da177e4 199 /* Read BD Address */
a9de9248
MH		 200 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
201
202 /* Read Class of Device */
203 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
204
205 /* Read Local Name */
206 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 207
208 /* Read Voice Setting */
a9de9248 209 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 210
211 /* Optional initialization */
212
213 /* Clear Event Filters */
89f2783d 214 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 215 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 216
1da177e4 217 /* Connection accept timeout ~20 secs */
aca3192c 218 param = cpu_to_le16(0x7d00);
a9de9248 219 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 220
221 bacpy(&cp.bdaddr, BDADDR_ANY);
222 cp.delete_all = 1;
223 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 224}
225
e61ef499
AE		 226static void amp_init(struct hci_dev *hdev)
227{
2455a3ea
AE		 228 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
229
e61ef499
AE		 230 /* Reset */
231 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
232
233 /* Read Local Version */
234 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
235}
236
237static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
238{
239 struct sk_buff *skb;
240
241 BT_DBG("%s %ld", hdev->name, opt);
242
243 /* Driver initialization */
244
245 /* Special commands */
246 while ((skb = skb_dequeue(&hdev->driver_init))) {
247 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
248 skb->dev = (void *) hdev;
249
250 skb_queue_tail(&hdev->cmd_q, skb);
251 queue_work(hdev->workqueue, &hdev->cmd_work);
252 }
253 skb_queue_purge(&hdev->driver_init);
254
255 switch (hdev->dev_type) {
256 case HCI_BREDR:
257 bredr_init(hdev);
258 break;
259
260 case HCI_AMP:
261 amp_init(hdev);
262 break;
263
264 default:
265 BT_ERR("Unknown device type %d", hdev->dev_type);
266 break;
267 }
268
269}
270
6ed58ec5
VT		 271static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
272{
273 BT_DBG("%s", hdev->name);
274
275 /* Read LE buffer size */
276 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
277}
278
1da177e4
LT		 279static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
280{
281 __u8 scan = opt;
282
283 BT_DBG("%s %x", hdev->name, scan);
284
285 /* Inquiry and Page scans */
a9de9248 286 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 287}
288
289static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
290{
291 __u8 auth = opt;
292
293 BT_DBG("%s %x", hdev->name, auth);
294
295 /* Authentication */
a9de9248 296 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 297}
298
299static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
300{
301 __u8 encrypt = opt;
302
303 BT_DBG("%s %x", hdev->name, encrypt);
304
e4e8e37c 305 /* Encryption */
a9de9248 306 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 307}
308
e4e8e37c
MH		 309static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
310{
311 __le16 policy = cpu_to_le16(opt);
312
a418b893 313 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 314
315 /* Default link policy */
316 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
317}
318
8e87d142 319/* Get HCI device by index.
1da177e4
LT		 320 * Device is held on return. */
321struct hci_dev *hci_dev_get(int index)
322{
8035ded4 323 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 324
325 BT_DBG("%d", index);
326
327 if (index < 0)
328 return NULL;
329
330 read_lock(&hci_dev_list_lock);
8035ded4 331 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 332 if (d->id == index) {
333 hdev = hci_dev_hold(d);
334 break;
335 }
336 }
337 read_unlock(&hci_dev_list_lock);
338 return hdev;
339}
1da177e4
LT		 340
341/* ---- Inquiry support ---- */
ff9ef578 342
30dc78e1
JH		 343bool hci_discovery_active(struct hci_dev *hdev)
344{
345 struct discovery_state *discov = &hdev->discovery;
346
6fbe195d 347 switch (discov->state) {
343f935b 348 case DISCOVERY_FINDING:
6fbe195d 349 case DISCOVERY_RESOLVING:
30dc78e1
JH		 350 return true;
351
6fbe195d
AG		 352 default:
353 return false;
354 }
30dc78e1
JH		 355}
356
ff9ef578
JH		 357void hci_discovery_set_state(struct hci_dev *hdev, int state)
358{
359 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
360
361 if (hdev->discovery.state == state)
362 return;
363
364 switch (state) {
365 case DISCOVERY_STOPPED:
7b99b659
AG		 366 if (hdev->discovery.state != DISCOVERY_STARTING)
367 mgmt_discovering(hdev, 0);
f963e8e9 368 hdev->discovery.type = 0;
ff9ef578
JH		 369 break;
370 case DISCOVERY_STARTING:
371 break;
343f935b 372 case DISCOVERY_FINDING:
ff9ef578
JH		 373 mgmt_discovering(hdev, 1);
374 break;
30dc78e1
JH		 375 case DISCOVERY_RESOLVING:
376 break;
ff9ef578
JH		 377 case DISCOVERY_STOPPING:
378 break;
379 }
380
381 hdev->discovery.state = state;
382}
383
1da177e4
LT		 384static void inquiry_cache_flush(struct hci_dev *hdev)
385{
30883512 386 struct discovery_state *cache = &hdev->discovery;
b57c1a56 387 struct inquiry_entry *p, *n;
1da177e4 388
561aafbc
JH		 389 list_for_each_entry_safe(p, n, &cache->all, all) {
390 list_del(&p->all);
b57c1a56 391 kfree(p);
1da177e4 392 }
561aafbc
JH		 393
394 INIT_LIST_HEAD(&cache->unknown);
395 INIT_LIST_HEAD(&cache->resolve);
ff9ef578 396 cache->state = DISCOVERY_STOPPED;
1da177e4
LT		 397}
398
399struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
400{
30883512 401 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 402 struct inquiry_entry *e;
403
404 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
405
561aafbc
JH		 406 list_for_each_entry(e, &cache->all, all) {
407 if (!bacmp(&e->data.bdaddr, bdaddr))
408 return e;
409 }
410
411 return NULL;
412}
413
414struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
415 bdaddr_t *bdaddr)
416{
30883512 417 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 418 struct inquiry_entry *e;
419
420 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
421
422 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 423 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 424 return e;
425 }
426
427 return NULL;
1da177e4
LT		 428}
429
30dc78e1
JH		 430struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
431 bdaddr_t *bdaddr,
432 int state)
433{
434 struct discovery_state *cache = &hdev->discovery;
435 struct inquiry_entry *e;
436
437 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
438
439 list_for_each_entry(e, &cache->resolve, list) {
440 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
441 return e;
442 if (!bacmp(&e->data.bdaddr, bdaddr))
443 return e;
444 }
445
446 return NULL;
447}
448
a3d4e20a
JH		 449void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
450 struct inquiry_entry *ie)
451{
452 struct discovery_state *cache = &hdev->discovery;
453 struct list_head *pos = &cache->resolve;
454 struct inquiry_entry *p;
455
456 list_del(&ie->list);
457
458 list_for_each_entry(p, &cache->resolve, list) {
459 if (p->name_state != NAME_PENDING &&
460 abs(p->data.rssi) >= abs(ie->data.rssi))
461 break;
462 pos = &p->list;
463 }
464
465 list_add(&ie->list, pos);
466}
467
3175405b 468bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
561aafbc 469 bool name_known)
1da177e4 470{
30883512 471 struct discovery_state *cache = &hdev->discovery;
70f23020 472 struct inquiry_entry *ie;
1da177e4
LT		 473
474 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
475
70f23020 476 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a
JH		 477 if (ie) {
478 if (ie->name_state == NAME_NEEDED &&
479 data->rssi != ie->data.rssi) {
480 ie->data.rssi = data->rssi;
481 hci_inquiry_cache_update_resolve(hdev, ie);
482 }
483
561aafbc 484 goto update;
a3d4e20a 485 }
561aafbc
JH		 486
487 /* Entry not in the cache. Add new one. */
488 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
489 if (!ie)
3175405b 490 return false;
561aafbc
JH		 491
492 list_add(&ie->all, &cache->all);
493
494 if (name_known) {
495 ie->name_state = NAME_KNOWN;
496 } else {
497 ie->name_state = NAME_NOT_KNOWN;
498 list_add(&ie->list, &cache->unknown);
499 }
70f23020 500
561aafbc
JH		 501update:
502 if (name_known && ie->name_state != NAME_KNOWN &&
503 ie->name_state != NAME_PENDING) {
504 ie->name_state = NAME_KNOWN;
505 list_del(&ie->list);
1da177e4
LT		 506 }
507
70f23020
AE		 508 memcpy(&ie->data, data, sizeof(*data));
509 ie->timestamp = jiffies;
1da177e4 510 cache->timestamp = jiffies;
3175405b
JH		 511
512 if (ie->name_state == NAME_NOT_KNOWN)
513 return false;
514
515 return true;
1da177e4
LT		 516}
517
518static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
519{
30883512 520 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 521 struct inquiry_info *info = (struct inquiry_info *) buf;
522 struct inquiry_entry *e;
523 int copied = 0;
524
561aafbc 525 list_for_each_entry(e, &cache->all, all) {
1da177e4 526 struct inquiry_data *data = &e->data;
b57c1a56
JH		 527
528 if (copied >= num)
529 break;
530
1da177e4
LT		 531 bacpy(&info->bdaddr, &data->bdaddr);
532 info->pscan_rep_mode = data->pscan_rep_mode;
533 info->pscan_period_mode = data->pscan_period_mode;
534 info->pscan_mode = data->pscan_mode;
535 memcpy(info->dev_class, data->dev_class, 3);
536 info->clock_offset = data->clock_offset;
b57c1a56 537
1da177e4 538 info++;
b57c1a56 539 copied++;
1da177e4
LT		 540 }
541
542 BT_DBG("cache %p, copied %d", cache, copied);
543 return copied;
544}
545
546static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
547{
548 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
549 struct hci_cp_inquiry cp;
550
551 BT_DBG("%s", hdev->name);
552
553 if (test_bit(HCI_INQUIRY, &hdev->flags))
554 return;
555
556 /* Start Inquiry */
557 memcpy(&cp.lap, &ir->lap, 3);
558 cp.length = ir->length;
559 cp.num_rsp = ir->num_rsp;
a9de9248 560 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 561}
562
563int hci_inquiry(void __user *arg)
564{
565 __u8 __user *ptr = arg;
566 struct hci_inquiry_req ir;
567 struct hci_dev *hdev;
568 int err = 0, do_inquiry = 0, max_rsp;
569 long timeo;
570 __u8 *buf;
571
572 if (copy_from_user(&ir, ptr, sizeof(ir)))
573 return -EFAULT;
574
5a08ecce
AE		 575 hdev = hci_dev_get(ir.dev_id);
576 if (!hdev)
1da177e4
LT		 577 return -ENODEV;
578
09fd0de5 579 hci_dev_lock(hdev);
8e87d142 580 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 581 inquiry_cache_empty(hdev) ||
582 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 583 inquiry_cache_flush(hdev);
584 do_inquiry = 1;
585 }
09fd0de5 586 hci_dev_unlock(hdev);
1da177e4 587
04837f64 588 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 589
590 if (do_inquiry) {
591 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
592 if (err < 0)
593 goto done;
594 }
1da177e4
LT		 595
596 /* for unlimited number of responses we will use buffer with 255 entries */
597 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
598
599 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
600 * copy it to the user space.
601 */
01df8c31 602 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 603 if (!buf) {
1da177e4
LT		 604 err = -ENOMEM;
605 goto done;
606 }
607
09fd0de5 608 hci_dev_lock(hdev);
1da177e4 609 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 610 hci_dev_unlock(hdev);
1da177e4
LT		 611
612 BT_DBG("num_rsp %d", ir.num_rsp);
613
614 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
615 ptr += sizeof(ir);
616 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
617 ir.num_rsp))
618 err = -EFAULT;
8e87d142 619 } else
1da177e4
LT		 620 err = -EFAULT;
621
622 kfree(buf);
623
624done:
625 hci_dev_put(hdev);
626 return err;
627}
628
629/* ---- HCI ioctl helpers ---- */
630
631int hci_dev_open(__u16 dev)
632{
633 struct hci_dev *hdev;
634 int ret = 0;
635
5a08ecce
AE		 636 hdev = hci_dev_get(dev);
637 if (!hdev)
1da177e4
LT		 638 return -ENODEV;
639
640 BT_DBG("%s %p", hdev->name, hdev);
641
642 hci_req_lock(hdev);
643
611b30f7
MH		 644 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
645 ret = -ERFKILL;
646 goto done;
647 }
648
1da177e4
LT		 649 if (test_bit(HCI_UP, &hdev->flags)) {
650 ret = -EALREADY;
651 goto done;
652 }
653
654 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
655 set_bit(HCI_RAW, &hdev->flags);
656
07e3b94a
AE		 657 /* Treat all non BR/EDR controllers as raw devices if
658 enable_hs is not set */
659 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 660 set_bit(HCI_RAW, &hdev->flags);
661
1da177e4
LT		 662 if (hdev->open(hdev)) {
663 ret = -EIO;
664 goto done;
665 }
666
667 if (!test_bit(HCI_RAW, &hdev->flags)) {
668 atomic_set(&hdev->cmd_cnt, 1);
669 set_bit(HCI_INIT, &hdev->flags);
a5040efa 670 hdev->init_last_cmd = 0;
1da177e4 671
04837f64
MH		 672 ret = __hci_request(hdev, hci_init_req, 0,
673 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 674
eead27da 675 if (lmp_host_le_capable(hdev))
6ed58ec5
VT		 676 ret = __hci_request(hdev, hci_le_init_req, 0,
677 msecs_to_jiffies(HCI_INIT_TIMEOUT));
678
1da177e4
LT		 679 clear_bit(HCI_INIT, &hdev->flags);
680 }
681
682 if (!ret) {
683 hci_dev_hold(hdev);
684 set_bit(HCI_UP, &hdev->flags);
685 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 686 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 687 hci_dev_lock(hdev);
744cf19e 688 mgmt_powered(hdev, 1);
09fd0de5 689 hci_dev_unlock(hdev);
56e5cb86 690 }
8e87d142 691 } else {
1da177e4 692 /* Init failed, cleanup */
3eff45ea 693 flush_work(&hdev->tx_work);
c347b765 694 flush_work(&hdev->cmd_work);
b78752cc 695 flush_work(&hdev->rx_work);
1da177e4
LT		 696
697 skb_queue_purge(&hdev->cmd_q);
698 skb_queue_purge(&hdev->rx_q);
699
700 if (hdev->flush)
701 hdev->flush(hdev);
702
703 if (hdev->sent_cmd) {
704 kfree_skb(hdev->sent_cmd);
705 hdev->sent_cmd = NULL;
706 }
707
708 hdev->close(hdev);
709 hdev->flags = 0;
710 }
711
712done:
713 hci_req_unlock(hdev);
714 hci_dev_put(hdev);
715 return ret;
716}
717
718static int hci_dev_do_close(struct hci_dev *hdev)
719{
720 BT_DBG("%s %p", hdev->name, hdev);
721
28b75a89
AG		 722 cancel_work_sync(&hdev->le_scan);
723
1da177e4
LT		 724 hci_req_cancel(hdev, ENODEV);
725 hci_req_lock(hdev);
726
727 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 728 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 729 hci_req_unlock(hdev);
730 return 0;
731 }
732
3eff45ea
GP		 733 /* Flush RX and TX works */
734 flush_work(&hdev->tx_work);
b78752cc 735 flush_work(&hdev->rx_work);
1da177e4 736
16ab91ab 737 if (hdev->discov_timeout > 0) {
e0f9309f 738 cancel_delayed_work(&hdev->discov_off);
16ab91ab
JH		 739 hdev->discov_timeout = 0;
740 }
741
a8b2d5c2 742 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 743 cancel_delayed_work(&hdev->power_off);
3243553f 744
a8b2d5c2 745 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 746 cancel_delayed_work(&hdev->service_cache);
747
7ba8b4be
AG		 748 cancel_delayed_work_sync(&hdev->le_scan_disable);
749
09fd0de5 750 hci_dev_lock(hdev);
1da177e4
LT		 751 inquiry_cache_flush(hdev);
752 hci_conn_hash_flush(hdev);
09fd0de5 753 hci_dev_unlock(hdev);
1da177e4
LT		 754
755 hci_notify(hdev, HCI_DEV_DOWN);
756
757 if (hdev->flush)
758 hdev->flush(hdev);
759
760 /* Reset device */
761 skb_queue_purge(&hdev->cmd_q);
762 atomic_set(&hdev->cmd_cnt, 1);
8af59467
JH		 763 if (!test_bit(HCI_RAW, &hdev->flags) &&
764 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
1da177e4 765 set_bit(HCI_INIT, &hdev->flags);
04837f64 766 __hci_request(hdev, hci_reset_req, 0,
cad44c2b 767 msecs_to_jiffies(250));
1da177e4
LT		 768 clear_bit(HCI_INIT, &hdev->flags);
769 }
770
c347b765
GP		 771 /* flush cmd work */
772 flush_work(&hdev->cmd_work);
1da177e4
LT		 773
774 /* Drop queues */
775 skb_queue_purge(&hdev->rx_q);
776 skb_queue_purge(&hdev->cmd_q);
777 skb_queue_purge(&hdev->raw_q);
778
779 /* Drop last sent command */
780 if (hdev->sent_cmd) {
b79f44c1 781 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 782 kfree_skb(hdev->sent_cmd);
783 hdev->sent_cmd = NULL;
784 }
785
786 /* After this point our queues are empty
787 * and no tasks are scheduled. */
788 hdev->close(hdev);
789
09fd0de5 790 hci_dev_lock(hdev);
744cf19e 791 mgmt_powered(hdev, 0);
09fd0de5 792 hci_dev_unlock(hdev);
5add6af8 793
1da177e4
LT		 794 /* Clear flags */
795 hdev->flags = 0;
796
797 hci_req_unlock(hdev);
798
799 hci_dev_put(hdev);
800 return 0;
801}
802
803int hci_dev_close(__u16 dev)
804{
805 struct hci_dev *hdev;
806 int err;
807
70f23020
AE		 808 hdev = hci_dev_get(dev);
809 if (!hdev)
1da177e4
LT		 810 return -ENODEV;
811 err = hci_dev_do_close(hdev);
812 hci_dev_put(hdev);
813 return err;
814}
815
816int hci_dev_reset(__u16 dev)
817{
818 struct hci_dev *hdev;
819 int ret = 0;
820
70f23020
AE		 821 hdev = hci_dev_get(dev);
822 if (!hdev)
1da177e4
LT		 823 return -ENODEV;
824
825 hci_req_lock(hdev);
1da177e4
LT		 826
827 if (!test_bit(HCI_UP, &hdev->flags))
828 goto done;
829
830 /* Drop queues */
831 skb_queue_purge(&hdev->rx_q);
832 skb_queue_purge(&hdev->cmd_q);
833
09fd0de5 834 hci_dev_lock(hdev);
1da177e4
LT		 835 inquiry_cache_flush(hdev);
836 hci_conn_hash_flush(hdev);
09fd0de5 837 hci_dev_unlock(hdev);
1da177e4
LT		 838
839 if (hdev->flush)
840 hdev->flush(hdev);
841
8e87d142 842 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 843 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 844
845 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 846 ret = __hci_request(hdev, hci_reset_req, 0,
847 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 848
849done:
1da177e4
LT		 850 hci_req_unlock(hdev);
851 hci_dev_put(hdev);
852 return ret;
853}
854
855int hci_dev_reset_stat(__u16 dev)
856{
857 struct hci_dev *hdev;
858 int ret = 0;
859
70f23020
AE		 860 hdev = hci_dev_get(dev);
861 if (!hdev)
1da177e4
LT		 862 return -ENODEV;
863
864 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
865
866 hci_dev_put(hdev);
867
868 return ret;
869}
870
871int hci_dev_cmd(unsigned int cmd, void __user *arg)
872{
873 struct hci_dev *hdev;
874 struct hci_dev_req dr;
875 int err = 0;
876
877 if (copy_from_user(&dr, arg, sizeof(dr)))
878 return -EFAULT;
879
70f23020
AE		 880 hdev = hci_dev_get(dr.dev_id);
881 if (!hdev)
1da177e4
LT		 882 return -ENODEV;
883
884 switch (cmd) {
885 case HCISETAUTH:
04837f64
MH		 886 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
887 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 888 break;
889
890 case HCISETENCRYPT:
891 if (!lmp_encrypt_capable(hdev)) {
892 err = -EOPNOTSUPP;
893 break;
894 }
895
896 if (!test_bit(HCI_AUTH, &hdev->flags)) {
897 /* Auth must be enabled first */
04837f64
MH		 898 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
899 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 900 if (err)
901 break;
902 }
903
04837f64
MH		 904 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
905 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 906 break;
907
908 case HCISETSCAN:
04837f64
MH		 909 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
910 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 911 break;
912
1da177e4 913 case HCISETLINKPOL:
e4e8e37c
MH		 914 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
915 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 916 break;
917
918 case HCISETLINKMODE:
e4e8e37c
MH		 919 hdev->link_mode = ((__u16) dr.dev_opt) &
920 (HCI_LM_MASTER | HCI_LM_ACCEPT);
921 break;
922
923 case HCISETPTYPE:
924 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 925 break;
926
927 case HCISETACLMTU:
e4e8e37c
MH		 928 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
929 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 930 break;
931
932 case HCISETSCOMTU:
e4e8e37c
MH		 933 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
934 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 935 break;
936
937 default:
938 err = -EINVAL;
939 break;
940 }
e4e8e37c 941
1da177e4
LT		 942 hci_dev_put(hdev);
943 return err;
944}
945
946int hci_get_dev_list(void __user *arg)
947{
8035ded4 948 struct hci_dev *hdev;
1da177e4
LT		 949 struct hci_dev_list_req *dl;
950 struct hci_dev_req *dr;
1da177e4
LT		 951 int n = 0, size, err;
952 __u16 dev_num;
953
954 if (get_user(dev_num, (__u16 __user *) arg))
955 return -EFAULT;
956
957 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
958 return -EINVAL;
959
960 size = sizeof(*dl) + dev_num * sizeof(*dr);
961
70f23020
AE		 962 dl = kzalloc(size, GFP_KERNEL);
963 if (!dl)
1da177e4
LT		 964 return -ENOMEM;
965
966 dr = dl->dev_req;
967
f20d09d5 968 read_lock(&hci_dev_list_lock);
8035ded4 969 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 970 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 971 cancel_delayed_work(&hdev->power_off);
c542a06c 972
a8b2d5c2
JH		 973 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
974 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 975
1da177e4
LT		 976 (dr + n)->dev_id = hdev->id;
977 (dr + n)->dev_opt = hdev->flags;
c542a06c 978
1da177e4
LT		 979 if (++n >= dev_num)
980 break;
981 }
f20d09d5 982 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 983
984 dl->dev_num = n;
985 size = sizeof(*dl) + n * sizeof(*dr);
986
987 err = copy_to_user(arg, dl, size);
988 kfree(dl);
989
990 return err ? -EFAULT : 0;
991}
992
993int hci_get_dev_info(void __user *arg)
994{
995 struct hci_dev *hdev;
996 struct hci_dev_info di;
997 int err = 0;
998
999 if (copy_from_user(&di, arg, sizeof(di)))
1000 return -EFAULT;
1001
70f23020
AE		 1002 hdev = hci_dev_get(di.dev_id);
1003 if (!hdev)
1da177e4
LT		 1004 return -ENODEV;
1005
a8b2d5c2 1006 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1007 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1008
a8b2d5c2
JH		 1009 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1010 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1011
1da177e4
LT		 1012 strcpy(di.name, hdev->name);
1013 di.bdaddr = hdev->bdaddr;
943da25d 1014 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1015 di.flags = hdev->flags;
1016 di.pkt_type = hdev->pkt_type;
1017 di.acl_mtu = hdev->acl_mtu;
1018 di.acl_pkts = hdev->acl_pkts;
1019 di.sco_mtu = hdev->sco_mtu;
1020 di.sco_pkts = hdev->sco_pkts;
1021 di.link_policy = hdev->link_policy;
1022 di.link_mode = hdev->link_mode;
1023
1024 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1025 memcpy(&di.features, &hdev->features, sizeof(di.features));
1026
1027 if (copy_to_user(arg, &di, sizeof(di)))
1028 err = -EFAULT;
1029
1030 hci_dev_put(hdev);
1031
1032 return err;
1033}
1034
1035/* ---- Interface to HCI drivers ---- */
1036
611b30f7
MH		 1037static int hci_rfkill_set_block(void *data, bool blocked)
1038{
1039 struct hci_dev *hdev = data;
1040
1041 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1042
1043 if (!blocked)
1044 return 0;
1045
1046 hci_dev_do_close(hdev);
1047
1048 return 0;
1049}
1050
1051static const struct rfkill_ops hci_rfkill_ops = {
1052 .set_block = hci_rfkill_set_block,
1053};
1054
1da177e4
LT		 1055/* Alloc HCI device */
1056struct hci_dev *hci_alloc_dev(void)
1057{
1058 struct hci_dev *hdev;
1059
25ea6db0 1060 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 1061 if (!hdev)
1062 return NULL;
1063
0ac7e700 1064 hci_init_sysfs(hdev);
1da177e4
LT		 1065 skb_queue_head_init(&hdev->driver_init);
1066
1067 return hdev;
1068}
1069EXPORT_SYMBOL(hci_alloc_dev);
1070
1071/* Free HCI device */
1072void hci_free_dev(struct hci_dev *hdev)
1073{
1074 skb_queue_purge(&hdev->driver_init);
1075
a91f2e39
MH		 1076 /* will free via device release */
1077 put_device(&hdev->dev);
1da177e4
LT		 1078}
1079EXPORT_SYMBOL(hci_free_dev);
1080
ab81cbf9
JH		 1081static void hci_power_on(struct work_struct *work)
1082{
1083 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1084
1085 BT_DBG("%s", hdev->name);
1086
1087 if (hci_dev_open(hdev->id) < 0)
1088 return;
1089
a8b2d5c2 1090 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1091 schedule_delayed_work(&hdev->power_off,
3243553f 1092 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1093
a8b2d5c2 1094 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1095 mgmt_index_added(hdev);
ab81cbf9
JH		 1096}
1097
1098static void hci_power_off(struct work_struct *work)
1099{
3243553f
JH		 1100 struct hci_dev *hdev = container_of(work, struct hci_dev,
1101 power_off.work);
ab81cbf9
JH		 1102
1103 BT_DBG("%s", hdev->name);
1104
a8b2d5c2 1105 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ab81cbf9 1106
3243553f 1107 hci_dev_close(hdev->id);
ab81cbf9
JH		 1108}
1109
16ab91ab
JH		 1110static void hci_discov_off(struct work_struct *work)
1111{
1112 struct hci_dev *hdev;
1113 u8 scan = SCAN_PAGE;
1114
1115 hdev = container_of(work, struct hci_dev, discov_off.work);
1116
1117 BT_DBG("%s", hdev->name);
1118
09fd0de5 1119 hci_dev_lock(hdev);
16ab91ab
JH		 1120
1121 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1122
1123 hdev->discov_timeout = 0;
1124
09fd0de5 1125 hci_dev_unlock(hdev);
16ab91ab
JH		 1126}
1127
2aeb9a1a
JH		 1128int hci_uuids_clear(struct hci_dev *hdev)
1129{
1130 struct list_head *p, *n;
1131
1132 list_for_each_safe(p, n, &hdev->uuids) {
1133 struct bt_uuid *uuid;
1134
1135 uuid = list_entry(p, struct bt_uuid, list);
1136
1137 list_del(p);
1138 kfree(uuid);
1139 }
1140
1141 return 0;
1142}
1143
55ed8ca1
JH		 1144int hci_link_keys_clear(struct hci_dev *hdev)
1145{
1146 struct list_head *p, *n;
1147
1148 list_for_each_safe(p, n, &hdev->link_keys) {
1149 struct link_key *key;
1150
1151 key = list_entry(p, struct link_key, list);
1152
1153 list_del(p);
1154 kfree(key);
1155 }
1156
1157 return 0;
1158}
1159
b899efaf
VCG		 1160int hci_smp_ltks_clear(struct hci_dev *hdev)
1161{
1162 struct smp_ltk *k, *tmp;
1163
1164 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1165 list_del(&k->list);
1166 kfree(k);
1167 }
1168
1169 return 0;
1170}
1171
55ed8ca1
JH		 1172struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1173{
8035ded4 1174 struct link_key *k;
55ed8ca1 1175
8035ded4 1176 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1177 if (bacmp(bdaddr, &k->bdaddr) == 0)
1178 return k;
55ed8ca1
JH		 1179
1180 return NULL;
1181}
1182
d25e28ab
JH		 1183static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1184 u8 key_type, u8 old_key_type)
1185{
1186 /* Legacy key */
1187 if (key_type < 0x03)
1188 return 1;
1189
1190 /* Debug keys are insecure so don't store them persistently */
1191 if (key_type == HCI_LK_DEBUG_COMBINATION)
1192 return 0;
1193
1194 /* Changed combination key and there's no previous one */
1195 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1196 return 0;
1197
1198 /* Security mode 3 case */
1199 if (!conn)
1200 return 1;
1201
1202 /* Neither local nor remote side had no-bonding as requirement */
1203 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1204 return 1;
1205
1206 /* Local side had dedicated bonding as requirement */
1207 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1208 return 1;
1209
1210 /* Remote side had dedicated bonding as requirement */
1211 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1212 return 1;
1213
1214 /* If none of the above criteria match, then don't store the key
1215 * persistently */
1216 return 0;
1217}
1218
c9839a11 1219struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1220{
c9839a11 1221 struct smp_ltk *k;
75d262c2 1222
c9839a11
VCG		 1223 list_for_each_entry(k, &hdev->long_term_keys, list) {
1224 if (k->ediv != ediv ||
1225 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1226 continue;
1227
c9839a11 1228 return k;
75d262c2
VCG		 1229 }
1230
1231 return NULL;
1232}
1233EXPORT_SYMBOL(hci_find_ltk);
1234
c9839a11
VCG		 1235struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1236 u8 addr_type)
75d262c2 1237{
c9839a11 1238 struct smp_ltk *k;
75d262c2 1239
c9839a11
VCG		 1240 list_for_each_entry(k, &hdev->long_term_keys, list)
1241 if (addr_type == k->bdaddr_type &&
1242 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1243 return k;
1244
1245 return NULL;
1246}
c9839a11 1247EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1248
d25e28ab
JH		 1249int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1250 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1251{
1252 struct link_key *key, *old_key;
4df378a1 1253 u8 old_key_type, persistent;
55ed8ca1
JH		 1254
1255 old_key = hci_find_link_key(hdev, bdaddr);
1256 if (old_key) {
1257 old_key_type = old_key->type;
1258 key = old_key;
1259 } else {
12adcf3a 1260 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1261 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1262 if (!key)
1263 return -ENOMEM;
1264 list_add(&key->list, &hdev->link_keys);
1265 }
1266
1267 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1268
d25e28ab
JH		 1269 /* Some buggy controller combinations generate a changed
1270 * combination key for legacy pairing even when there's no
1271 * previous key */
1272 if (type == HCI_LK_CHANGED_COMBINATION &&
1273 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1274 old_key_type == 0xff) {
d25e28ab 1275 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1276 if (conn)
1277 conn->key_type = type;
1278 }
d25e28ab 1279
55ed8ca1
JH		 1280 bacpy(&key->bdaddr, bdaddr);
1281 memcpy(key->val, val, 16);
55ed8ca1
JH		 1282 key->pin_len = pin_len;
1283
b6020ba0 1284 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1285 key->type = old_key_type;
4748fed2
JH		 1286 else
1287 key->type = type;
1288
4df378a1
JH		 1289 if (!new_key)
1290 return 0;
1291
1292 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1293
744cf19e 1294 mgmt_new_link_key(hdev, key, persistent);
4df378a1
JH		 1295
1296 if (!persistent) {
1297 list_del(&key->list);
1298 kfree(key);
1299 }
55ed8ca1
JH		 1300
1301 return 0;
1302}
1303
c9839a11
VCG		 1304int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1305 int new_key, u8 authenticated, u8 tk[16],
1306 u8 enc_size, u16 ediv, u8 rand[8])
75d262c2 1307{
c9839a11 1308 struct smp_ltk *key, *old_key;
75d262c2 1309
c9839a11
VCG		 1310 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1311 return 0;
75d262c2 1312
c9839a11
VCG		 1313 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1314 if (old_key)
75d262c2 1315 key = old_key;
c9839a11
VCG		 1316 else {
1317 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1318 if (!key)
1319 return -ENOMEM;
c9839a11 1320 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1321 }
1322
75d262c2 1323 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1324 key->bdaddr_type = addr_type;
1325 memcpy(key->val, tk, sizeof(key->val));
1326 key->authenticated = authenticated;
1327 key->ediv = ediv;
1328 key->enc_size = enc_size;
1329 key->type = type;
1330 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1331
c9839a11
VCG		 1332 if (!new_key)
1333 return 0;
75d262c2 1334
261cc5aa
VCG		 1335 if (type & HCI_SMP_LTK)
1336 mgmt_new_ltk(hdev, key, 1);
1337
75d262c2
VCG		 1338 return 0;
1339}
1340
55ed8ca1
JH		 1341int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1342{
1343 struct link_key *key;
1344
1345 key = hci_find_link_key(hdev, bdaddr);
1346 if (!key)
1347 return -ENOENT;
1348
1349 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1350
1351 list_del(&key->list);
1352 kfree(key);
1353
1354 return 0;
1355}
1356
b899efaf
VCG		 1357int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1358{
1359 struct smp_ltk *k, *tmp;
1360
1361 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1362 if (bacmp(bdaddr, &k->bdaddr))
1363 continue;
1364
1365 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1366
1367 list_del(&k->list);
1368 kfree(k);
1369 }
1370
1371 return 0;
1372}
1373
6bd32326
VT		 1374/* HCI command timer function */
1375static void hci_cmd_timer(unsigned long arg)
1376{
1377 struct hci_dev *hdev = (void *) arg;
1378
1379 BT_ERR("%s command tx timeout", hdev->name);
1380 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1381 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1382}
1383
2763eda6
SJ		 1384struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1385 bdaddr_t *bdaddr)
1386{
1387 struct oob_data *data;
1388
1389 list_for_each_entry(data, &hdev->remote_oob_data, list)
1390 if (bacmp(bdaddr, &data->bdaddr) == 0)
1391 return data;
1392
1393 return NULL;
1394}
1395
1396int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1397{
1398 struct oob_data *data;
1399
1400 data = hci_find_remote_oob_data(hdev, bdaddr);
1401 if (!data)
1402 return -ENOENT;
1403
1404 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1405
1406 list_del(&data->list);
1407 kfree(data);
1408
1409 return 0;
1410}
1411
1412int hci_remote_oob_data_clear(struct hci_dev *hdev)
1413{
1414 struct oob_data *data, *n;
1415
1416 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1417 list_del(&data->list);
1418 kfree(data);
1419 }
1420
1421 return 0;
1422}
1423
1424int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1425 u8 *randomizer)
1426{
1427 struct oob_data *data;
1428
1429 data = hci_find_remote_oob_data(hdev, bdaddr);
1430
1431 if (!data) {
1432 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1433 if (!data)
1434 return -ENOMEM;
1435
1436 bacpy(&data->bdaddr, bdaddr);
1437 list_add(&data->list, &hdev->remote_oob_data);
1438 }
1439
1440 memcpy(data->hash, hash, sizeof(data->hash));
1441 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1442
1443 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1444
1445 return 0;
1446}
1447
b2a66aad
AJ		 1448struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
1449 bdaddr_t *bdaddr)
1450{
8035ded4 1451 struct bdaddr_list *b;
b2a66aad 1452
8035ded4 1453 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1454 if (bacmp(bdaddr, &b->bdaddr) == 0)
1455 return b;
b2a66aad
AJ		 1456
1457 return NULL;
1458}
1459
1460int hci_blacklist_clear(struct hci_dev *hdev)
1461{
1462 struct list_head *p, *n;
1463
1464 list_for_each_safe(p, n, &hdev->blacklist) {
1465 struct bdaddr_list *b;
1466
1467 b = list_entry(p, struct bdaddr_list, list);
1468
1469 list_del(p);
1470 kfree(b);
1471 }
1472
1473 return 0;
1474}
1475
88c1fe4b 1476int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1477{
1478 struct bdaddr_list *entry;
b2a66aad
AJ		 1479
1480 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1481 return -EBADF;
1482
5e762444
AJ		 1483 if (hci_blacklist_lookup(hdev, bdaddr))
1484 return -EEXIST;
b2a66aad
AJ		 1485
1486 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1487 if (!entry)
1488 return -ENOMEM;
b2a66aad
AJ		 1489
1490 bacpy(&entry->bdaddr, bdaddr);
1491
1492 list_add(&entry->list, &hdev->blacklist);
1493
88c1fe4b 1494 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1495}
1496
88c1fe4b 1497int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1498{
1499 struct bdaddr_list *entry;
b2a66aad 1500
1ec918ce 1501 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1502 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1503
1504 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1505 if (!entry)
5e762444 1506 return -ENOENT;
b2a66aad
AJ		 1507
1508 list_del(&entry->list);
1509 kfree(entry);
1510
88c1fe4b 1511 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1512}
1513
db323f2f 1514static void hci_clear_adv_cache(struct work_struct *work)
35815085 1515{
db323f2f
GP		 1516 struct hci_dev *hdev = container_of(work, struct hci_dev,
1517 adv_work.work);
35815085
AG		 1518
1519 hci_dev_lock(hdev);
1520
1521 hci_adv_entries_clear(hdev);
1522
1523 hci_dev_unlock(hdev);
1524}
1525
76c8686f
AG		 1526int hci_adv_entries_clear(struct hci_dev *hdev)
1527{
1528 struct adv_entry *entry, *tmp;
1529
1530 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1531 list_del(&entry->list);
1532 kfree(entry);
1533 }
1534
1535 BT_DBG("%s adv cache cleared", hdev->name);
1536
1537 return 0;
1538}
1539
1540struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1541{
1542 struct adv_entry *entry;
1543
1544 list_for_each_entry(entry, &hdev->adv_entries, list)
1545 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1546 return entry;
1547
1548 return NULL;
1549}
1550
1551static inline int is_connectable_adv(u8 evt_type)
1552{
1553 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1554 return 1;
1555
1556 return 0;
1557}
1558
1559int hci_add_adv_entry(struct hci_dev *hdev,
1560 struct hci_ev_le_advertising_info *ev)
1561{
1562 struct adv_entry *entry;
1563
1564 if (!is_connectable_adv(ev->evt_type))
1565 return -EINVAL;
1566
1567 /* Only new entries should be added to adv_entries. So, if
1568 * bdaddr was found, don't add it. */
1569 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1570 return 0;
1571
4777bfde 1572 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
76c8686f
AG		 1573 if (!entry)
1574 return -ENOMEM;
1575
1576 bacpy(&entry->bdaddr, &ev->bdaddr);
1577 entry->bdaddr_type = ev->bdaddr_type;
1578
1579 list_add(&entry->list, &hdev->adv_entries);
1580
1581 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1582 batostr(&entry->bdaddr), entry->bdaddr_type);
1583
1584 return 0;
1585}
1586
7ba8b4be
AG		 1587static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1588{
1589 struct le_scan_params *param = (struct le_scan_params *) opt;
1590 struct hci_cp_le_set_scan_param cp;
1591
1592 memset(&cp, 0, sizeof(cp));
1593 cp.type = param->type;
1594 cp.interval = cpu_to_le16(param->interval);
1595 cp.window = cpu_to_le16(param->window);
1596
1597 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1598}
1599
1600static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1601{
1602 struct hci_cp_le_set_scan_enable cp;
1603
1604 memset(&cp, 0, sizeof(cp));
1605 cp.enable = 1;
1606
1607 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1608}
1609
1610static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1611 u16 window, int timeout)
1612{
1613 long timeo = msecs_to_jiffies(3000);
1614 struct le_scan_params param;
1615 int err;
1616
1617 BT_DBG("%s", hdev->name);
1618
1619 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1620 return -EINPROGRESS;
1621
1622 param.type = type;
1623 param.interval = interval;
1624 param.window = window;
1625
1626 hci_req_lock(hdev);
1627
1628 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
1629 timeo);
1630 if (!err)
1631 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1632
1633 hci_req_unlock(hdev);
1634
1635 if (err < 0)
1636 return err;
1637
1638 schedule_delayed_work(&hdev->le_scan_disable,
1639 msecs_to_jiffies(timeout));
1640
1641 return 0;
1642}
1643
1644static void le_scan_disable_work(struct work_struct *work)
1645{
1646 struct hci_dev *hdev = container_of(work, struct hci_dev,
1647 le_scan_disable.work);
1648 struct hci_cp_le_set_scan_enable cp;
1649
1650 BT_DBG("%s", hdev->name);
1651
1652 memset(&cp, 0, sizeof(cp));
1653
1654 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1655}
1656
28b75a89
AG		 1657static void le_scan_work(struct work_struct *work)
1658{
1659 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1660 struct le_scan_params *param = &hdev->le_scan_params;
1661
1662 BT_DBG("%s", hdev->name);
1663
1664 hci_do_le_scan(hdev, param->type, param->interval,
1665 param->window, param->timeout);
1666}
1667
1668int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1669 int timeout)
1670{
1671 struct le_scan_params *param = &hdev->le_scan_params;
1672
1673 BT_DBG("%s", hdev->name);
1674
1675 if (work_busy(&hdev->le_scan))
1676 return -EINPROGRESS;
1677
1678 param->type = type;
1679 param->interval = interval;
1680 param->window = window;
1681 param->timeout = timeout;
1682
1683 queue_work(system_long_wq, &hdev->le_scan);
1684
1685 return 0;
1686}
1687
1da177e4
LT		 1688/* Register HCI device */
1689int hci_register_dev(struct hci_dev *hdev)
1690{
1691 struct list_head *head = &hci_dev_list, *p;
08add513 1692 int i, id, error;
1da177e4 1693
e9b9cfa1 1694 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
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 */
1702 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
1703
f20d09d5 1704 write_lock(&hci_dev_list_lock);
1da177e4
LT		 1705
1706 /* Find first available device id */
1707 list_for_each(p, &hci_dev_list) {
1708 if (list_entry(p, struct hci_dev, list)->id != id)
1709 break;
1710 head = p; id++;
1711 }
8e87d142 1712
1da177e4
LT		 1713 sprintf(hdev->name, "hci%d", id);
1714 hdev->id = id;
c6feeb28 1715 list_add_tail(&hdev->list, head);
1da177e4 1716
09fd0de5 1717 mutex_init(&hdev->lock);
1da177e4
LT		 1718
1719 hdev->flags = 0;
d23264a8 1720 hdev->dev_flags = 0;
1da177e4 1721 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1722 hdev->esco_type = (ESCO_HV1);
1da177e4 1723 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1724 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1725
04837f64
MH		 1726 hdev->idle_timeout = 0;
1727 hdev->sniff_max_interval = 800;
1728 hdev->sniff_min_interval = 80;
1729
b78752cc 1730 INIT_WORK(&hdev->rx_work, hci_rx_work);
c347b765 1731 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3eff45ea 1732 INIT_WORK(&hdev->tx_work, hci_tx_work);
b78752cc 1733
1da177e4
LT		 1734
1735 skb_queue_head_init(&hdev->rx_q);
1736 skb_queue_head_init(&hdev->cmd_q);
1737 skb_queue_head_init(&hdev->raw_q);
1738
6bd32326
VT		 1739 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1740
cd4c5391 1741 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1742 hdev->reassembly[i] = NULL;
1743
1da177e4 1744 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1745 mutex_init(&hdev->req_lock);
1da177e4 1746
30883512 1747 discovery_init(hdev);
1da177e4
LT		 1748
1749 hci_conn_hash_init(hdev);
1750
2e58ef3e
JH		 1751 INIT_LIST_HEAD(&hdev->mgmt_pending);
1752
ea4bd8ba 1753 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1754
2aeb9a1a
JH		 1755 INIT_LIST_HEAD(&hdev->uuids);
1756
55ed8ca1 1757 INIT_LIST_HEAD(&hdev->link_keys);
b899efaf 1758 INIT_LIST_HEAD(&hdev->long_term_keys);
55ed8ca1 1759
2763eda6
SJ		 1760 INIT_LIST_HEAD(&hdev->remote_oob_data);
1761
76c8686f
AG		 1762 INIT_LIST_HEAD(&hdev->adv_entries);
1763
db323f2f 1764 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
ab81cbf9 1765 INIT_WORK(&hdev->power_on, hci_power_on);
3243553f 1766 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
ab81cbf9 1767
16ab91ab
JH		 1768 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1769
1da177e4
LT		 1770 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1771
1772 atomic_set(&hdev->promisc, 0);
1773
28b75a89
AG		 1774 INIT_WORK(&hdev->le_scan, le_scan_work);
1775
7ba8b4be
AG		 1776 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1777
f20d09d5 1778 write_unlock(&hci_dev_list_lock);
1da177e4 1779
32845eb1
GP		 1780 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1781 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1782 if (!hdev->workqueue) {
1783 error = -ENOMEM;
1784 goto err;
1785 }
f48fd9c8 1786
33ca954d
DH		 1787 error = hci_add_sysfs(hdev);
1788 if (error < 0)
1789 goto err_wqueue;
1da177e4 1790
611b30f7
MH		 1791 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1792 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1793 if (hdev->rfkill) {
1794 if (rfkill_register(hdev->rfkill) < 0) {
1795 rfkill_destroy(hdev->rfkill);
1796 hdev->rfkill = NULL;
1797 }
1798 }
1799
a8b2d5c2
JH		 1800 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1801 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1802 schedule_work(&hdev->power_on);
ab81cbf9 1803
1da177e4 1804 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1805 hci_dev_hold(hdev);
1da177e4
LT		 1806
1807 return id;
f48fd9c8 1808
33ca954d
DH		 1809err_wqueue:
1810 destroy_workqueue(hdev->workqueue);
1811err:
f20d09d5 1812 write_lock(&hci_dev_list_lock);
f48fd9c8 1813 list_del(&hdev->list);
f20d09d5 1814 write_unlock(&hci_dev_list_lock);
f48fd9c8 1815
33ca954d 1816 return error;
1da177e4
LT		 1817}
1818EXPORT_SYMBOL(hci_register_dev);
1819
1820/* Unregister HCI device */
59735631 1821void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1822{
ef222013
MH		 1823 int i;
1824
c13854ce 1825 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1826
f20d09d5 1827 write_lock(&hci_dev_list_lock);
1da177e4 1828 list_del(&hdev->list);
f20d09d5 1829 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1830
1831 hci_dev_do_close(hdev);
1832
cd4c5391 1833 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1834 kfree_skb(hdev->reassembly[i]);
1835
ab81cbf9 1836 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1837 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1838 hci_dev_lock(hdev);
744cf19e 1839 mgmt_index_removed(hdev);
09fd0de5 1840 hci_dev_unlock(hdev);
56e5cb86 1841 }
ab81cbf9 1842
2e58ef3e
JH		 1843 /* mgmt_index_removed should take care of emptying the
1844 * pending list */
1845 BUG_ON(!list_empty(&hdev->mgmt_pending));
1846
1da177e4
LT		 1847 hci_notify(hdev, HCI_DEV_UNREG);
1848
611b30f7
MH		 1849 if (hdev->rfkill) {
1850 rfkill_unregister(hdev->rfkill);
1851 rfkill_destroy(hdev->rfkill);
1852 }
1853
ce242970 1854 hci_del_sysfs(hdev);
147e2d59 1855
db323f2f 1856 cancel_delayed_work_sync(&hdev->adv_work);
c6f3c5f7 1857
f48fd9c8
MH		 1858 destroy_workqueue(hdev->workqueue);
1859
09fd0de5 1860 hci_dev_lock(hdev);
e2e0cacb 1861 hci_blacklist_clear(hdev);
2aeb9a1a 1862 hci_uuids_clear(hdev);
55ed8ca1 1863 hci_link_keys_clear(hdev);
b899efaf 1864 hci_smp_ltks_clear(hdev);
2763eda6 1865 hci_remote_oob_data_clear(hdev);
76c8686f 1866 hci_adv_entries_clear(hdev);
09fd0de5 1867 hci_dev_unlock(hdev);
e2e0cacb 1868
dc946bd8 1869 hci_dev_put(hdev);
1da177e4
LT		 1870}
1871EXPORT_SYMBOL(hci_unregister_dev);
1872
1873/* Suspend HCI device */
1874int hci_suspend_dev(struct hci_dev *hdev)
1875{
1876 hci_notify(hdev, HCI_DEV_SUSPEND);
1877 return 0;
1878}
1879EXPORT_SYMBOL(hci_suspend_dev);
1880
1881/* Resume HCI device */
1882int hci_resume_dev(struct hci_dev *hdev)
1883{
1884 hci_notify(hdev, HCI_DEV_RESUME);
1885 return 0;
1886}
1887EXPORT_SYMBOL(hci_resume_dev);
1888
76bca880
MH		 1889/* Receive frame from HCI drivers */
1890int hci_recv_frame(struct sk_buff *skb)
1891{
1892 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1893 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1894 && !test_bit(HCI_INIT, &hdev->flags))) {
1895 kfree_skb(skb);
1896 return -ENXIO;
1897 }
1898
1899 /* Incomming skb */
1900 bt_cb(skb)->incoming = 1;
1901
1902 /* Time stamp */
1903 __net_timestamp(skb);
1904
76bca880 1905 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1906 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1907
76bca880
MH		 1908 return 0;
1909}
1910EXPORT_SYMBOL(hci_recv_frame);
1911
33e882a5 1912static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1913 int count, __u8 index)
33e882a5
SS		 1914{
1915 int len = 0;
1916 int hlen = 0;
1917 int remain = count;
1918 struct sk_buff *skb;
1919 struct bt_skb_cb *scb;
1920
1921 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1922 index >= NUM_REASSEMBLY)
1923 return -EILSEQ;
1924
1925 skb = hdev->reassembly[index];
1926
1927 if (!skb) {
1928 switch (type) {
1929 case HCI_ACLDATA_PKT:
1930 len = HCI_MAX_FRAME_SIZE;
1931 hlen = HCI_ACL_HDR_SIZE;
1932 break;
1933 case HCI_EVENT_PKT:
1934 len = HCI_MAX_EVENT_SIZE;
1935 hlen = HCI_EVENT_HDR_SIZE;
1936 break;
1937 case HCI_SCODATA_PKT:
1938 len = HCI_MAX_SCO_SIZE;
1939 hlen = HCI_SCO_HDR_SIZE;
1940 break;
1941 }
1942
1e429f38 1943 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1944 if (!skb)
1945 return -ENOMEM;
1946
1947 scb = (void *) skb->cb;
1948 scb->expect = hlen;
1949 scb->pkt_type = type;
1950
1951 skb->dev = (void *) hdev;
1952 hdev->reassembly[index] = skb;
1953 }
1954
1955 while (count) {
1956 scb = (void *) skb->cb;
1957 len = min(scb->expect, (__u16)count);
1958
1959 memcpy(skb_put(skb, len), data, len);
1960
1961 count -= len;
1962 data += len;
1963 scb->expect -= len;
1964 remain = count;
1965
1966 switch (type) {
1967 case HCI_EVENT_PKT:
1968 if (skb->len == HCI_EVENT_HDR_SIZE) {
1969 struct hci_event_hdr *h = hci_event_hdr(skb);
1970 scb->expect = h->plen;
1971
1972 if (skb_tailroom(skb) < scb->expect) {
1973 kfree_skb(skb);
1974 hdev->reassembly[index] = NULL;
1975 return -ENOMEM;
1976 }
1977 }
1978 break;
1979
1980 case HCI_ACLDATA_PKT:
1981 if (skb->len == HCI_ACL_HDR_SIZE) {
1982 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1983 scb->expect = __le16_to_cpu(h->dlen);
1984
1985 if (skb_tailroom(skb) < scb->expect) {
1986 kfree_skb(skb);
1987 hdev->reassembly[index] = NULL;
1988 return -ENOMEM;
1989 }
1990 }
1991 break;
1992
1993 case HCI_SCODATA_PKT:
1994 if (skb->len == HCI_SCO_HDR_SIZE) {
1995 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1996 scb->expect = h->dlen;
1997
1998 if (skb_tailroom(skb) < scb->expect) {
1999 kfree_skb(skb);
2000 hdev->reassembly[index] = NULL;
2001 return -ENOMEM;
2002 }
2003 }
2004 break;
2005 }
2006
2007 if (scb->expect == 0) {
2008 /* Complete frame */
2009
2010 bt_cb(skb)->pkt_type = type;
2011 hci_recv_frame(skb);
2012
2013 hdev->reassembly[index] = NULL;
2014 return remain;
2015 }
2016 }
2017
2018 return remain;
2019}
2020
ef222013
MH		 2021int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2022{
f39a3c06
SS		 2023 int rem = 0;
2024
ef222013
MH		 2025 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2026 return -EILSEQ;
2027
da5f6c37 2028 while (count) {
1e429f38 2029 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2030 if (rem < 0)
2031 return rem;
ef222013 2032
f39a3c06
SS		 2033 data += (count - rem);
2034 count = rem;
f81c6224 2035 }
ef222013 2036
f39a3c06 2037 return rem;
ef222013
MH		 2038}
2039EXPORT_SYMBOL(hci_recv_fragment);
2040
99811510
SS		 2041#define STREAM_REASSEMBLY 0
2042
2043int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2044{
2045 int type;
2046 int rem = 0;
2047
da5f6c37 2048 while (count) {
99811510
SS		 2049 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2050
2051 if (!skb) {
2052 struct { char type; } *pkt;
2053
2054 /* Start of the frame */
2055 pkt = data;
2056 type = pkt->type;
2057
2058 data++;
2059 count--;
2060 } else
2061 type = bt_cb(skb)->pkt_type;
2062
1e429f38
GP		 2063 rem = hci_reassembly(hdev, type, data, count,
2064 STREAM_REASSEMBLY);
99811510
SS		 2065 if (rem < 0)
2066 return rem;
2067
2068 data += (count - rem);
2069 count = rem;
f81c6224 2070 }
99811510
SS		 2071
2072 return rem;
2073}
2074EXPORT_SYMBOL(hci_recv_stream_fragment);
2075
1da177e4
LT		 2076/* ---- Interface to upper protocols ---- */
2077
1da177e4
LT		 2078int hci_register_cb(struct hci_cb *cb)
2079{
2080 BT_DBG("%p name %s", cb, cb->name);
2081
f20d09d5 2082 write_lock(&hci_cb_list_lock);
1da177e4 2083 list_add(&cb->list, &hci_cb_list);
f20d09d5 2084 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2085
2086 return 0;
2087}
2088EXPORT_SYMBOL(hci_register_cb);
2089
2090int hci_unregister_cb(struct hci_cb *cb)
2091{
2092 BT_DBG("%p name %s", cb, cb->name);
2093
f20d09d5 2094 write_lock(&hci_cb_list_lock);
1da177e4 2095 list_del(&cb->list);
f20d09d5 2096 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2097
2098 return 0;
2099}
2100EXPORT_SYMBOL(hci_unregister_cb);
2101
2102static int hci_send_frame(struct sk_buff *skb)
2103{
2104 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2105
2106 if (!hdev) {
2107 kfree_skb(skb);
2108 return -ENODEV;
2109 }
2110
0d48d939 2111 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2112
cd82e61c
MH		 2113 /* Time stamp */
2114 __net_timestamp(skb);
1da177e4 2115
cd82e61c
MH		 2116 /* Send copy to monitor */
2117 hci_send_to_monitor(hdev, skb);
2118
2119 if (atomic_read(&hdev->promisc)) {
2120 /* Send copy to the sockets */
470fe1b5 2121 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2122 }
2123
2124 /* Get rid of skb owner, prior to sending to the driver. */
2125 skb_orphan(skb);
2126
2127 return hdev->send(skb);
2128}
2129
2130/* Send HCI command */
a9de9248 2131int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2132{
2133 int len = HCI_COMMAND_HDR_SIZE + plen;
2134 struct hci_command_hdr *hdr;
2135 struct sk_buff *skb;
2136
a9de9248 2137 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2138
2139 skb = bt_skb_alloc(len, GFP_ATOMIC);
2140 if (!skb) {
ef222013 2141 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2142 return -ENOMEM;
2143 }
2144
2145 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2146 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2147 hdr->plen = plen;
2148
2149 if (plen)
2150 memcpy(skb_put(skb, plen), param, plen);
2151
2152 BT_DBG("skb len %d", skb->len);
2153
0d48d939 2154 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2155 skb->dev = (void *) hdev;
c78ae283 2156
a5040efa
JH		 2157 if (test_bit(HCI_INIT, &hdev->flags))
2158 hdev->init_last_cmd = opcode;
2159
1da177e4 2160 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2161 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2162
2163 return 0;
2164}
1da177e4
LT		 2165
2166/* Get data from the previously sent command */
a9de9248 2167void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2168{
2169 struct hci_command_hdr *hdr;
2170
2171 if (!hdev->sent_cmd)
2172 return NULL;
2173
2174 hdr = (void *) hdev->sent_cmd->data;
2175
a9de9248 2176 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2177 return NULL;
2178
a9de9248 2179 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2180
2181 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2182}
2183
2184/* Send ACL data */
2185static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2186{
2187 struct hci_acl_hdr *hdr;
2188 int len = skb->len;
2189
badff6d0
ACM		 2190 skb_push(skb, HCI_ACL_HDR_SIZE);
2191 skb_reset_transport_header(skb);
9c70220b 2192 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2193 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2194 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2195}
2196
73d80deb
LAD		 2197static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2198 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2199{
2200 struct hci_dev *hdev = conn->hdev;
2201 struct sk_buff *list;
2202
70f23020
AE		 2203 list = skb_shinfo(skb)->frag_list;
2204 if (!list) {
1da177e4
LT		 2205 /* Non fragmented */
2206 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2207
73d80deb 2208 skb_queue_tail(queue, skb);
1da177e4
LT		 2209 } else {
2210 /* Fragmented */
2211 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2212
2213 skb_shinfo(skb)->frag_list = NULL;
2214
2215 /* Queue all fragments atomically */
af3e6359 2216 spin_lock(&queue->lock);
1da177e4 2217
73d80deb 2218 __skb_queue_tail(queue, skb);
e702112f
AE		 2219
2220 flags &= ~ACL_START;
2221 flags |= ACL_CONT;
1da177e4
LT		 2222 do {
2223 skb = list; list = list->next;
8e87d142 2224
1da177e4 2225 skb->dev = (void *) hdev;
0d48d939 2226 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2227 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2228
2229 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2230
73d80deb 2231 __skb_queue_tail(queue, skb);
1da177e4
LT		 2232 } while (list);
2233
af3e6359 2234 spin_unlock(&queue->lock);
1da177e4 2235 }
73d80deb
LAD		 2236}
2237
2238void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2239{
2240 struct hci_conn *conn = chan->conn;
2241 struct hci_dev *hdev = conn->hdev;
2242
2243 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2244
2245 skb->dev = (void *) hdev;
2246 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2247 hci_add_acl_hdr(skb, conn->handle, flags);
2248
2249 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2250
3eff45ea 2251 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2252}
2253EXPORT_SYMBOL(hci_send_acl);
2254
2255/* Send SCO data */
0d861d8b 2256void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2257{
2258 struct hci_dev *hdev = conn->hdev;
2259 struct hci_sco_hdr hdr;
2260
2261 BT_DBG("%s len %d", hdev->name, skb->len);
2262
aca3192c 2263 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2264 hdr.dlen = skb->len;
2265
badff6d0
ACM		 2266 skb_push(skb, HCI_SCO_HDR_SIZE);
2267 skb_reset_transport_header(skb);
9c70220b 2268 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2269
2270 skb->dev = (void *) hdev;
0d48d939 2271 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2272
1da177e4 2273 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2274 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2275}
2276EXPORT_SYMBOL(hci_send_sco);
2277
2278/* ---- HCI TX task (outgoing data) ---- */
2279
2280/* HCI Connection scheduler */
2281static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2282{
2283 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2284 struct hci_conn *conn = NULL, *c;
1da177e4 2285 int num = 0, min = ~0;
1da177e4 2286
8e87d142 2287 /* We don't have to lock device here. Connections are always
1da177e4 2288 * added and removed with TX task disabled. */
bf4c6325
GP		 2289
2290 rcu_read_lock();
2291
2292 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2293 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2294 continue;
769be974
MH		 2295
2296 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2297 continue;
2298
1da177e4
LT		 2299 num++;
2300
2301 if (c->sent < min) {
2302 min = c->sent;
2303 conn = c;
2304 }
52087a79
LAD		 2305
2306 if (hci_conn_num(hdev, type) == num)
2307 break;
1da177e4
LT		 2308 }
2309
bf4c6325
GP		 2310 rcu_read_unlock();
2311
1da177e4 2312 if (conn) {
6ed58ec5
VT		 2313 int cnt, q;
2314
2315 switch (conn->type) {
2316 case ACL_LINK:
2317 cnt = hdev->acl_cnt;
2318 break;
2319 case SCO_LINK:
2320 case ESCO_LINK:
2321 cnt = hdev->sco_cnt;
2322 break;
2323 case LE_LINK:
2324 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2325 break;
2326 default:
2327 cnt = 0;
2328 BT_ERR("Unknown link type");
2329 }
2330
2331 q = cnt / num;
1da177e4
LT		 2332 *quote = q ? q : 1;
2333 } else
2334 *quote = 0;
2335
2336 BT_DBG("conn %p quote %d", conn, *quote);
2337 return conn;
2338}
2339
bae1f5d9 2340static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2341{
2342 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2343 struct hci_conn *c;
1da177e4 2344
bae1f5d9 2345 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2346
bf4c6325
GP		 2347 rcu_read_lock();
2348
1da177e4 2349 /* Kill stalled connections */
bf4c6325 2350 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2351 if (c->type == type && c->sent) {
2352 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2353 hdev->name, batostr(&c->dst));
2354 hci_acl_disconn(c, 0x13);
2355 }
2356 }
bf4c6325
GP		 2357
2358 rcu_read_unlock();
1da177e4
LT		 2359}
2360
73d80deb
LAD		 2361static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2362 int *quote)
1da177e4 2363{
73d80deb
LAD		 2364 struct hci_conn_hash *h = &hdev->conn_hash;
2365 struct hci_chan *chan = NULL;
2366 int num = 0, min = ~0, cur_prio = 0;
1da177e4 2367 struct hci_conn *conn;
73d80deb
LAD		 2368 int cnt, q, conn_num = 0;
2369
2370 BT_DBG("%s", hdev->name);
2371
bf4c6325
GP		 2372 rcu_read_lock();
2373
2374 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2375 struct hci_chan *tmp;
2376
2377 if (conn->type != type)
2378 continue;
2379
2380 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2381 continue;
2382
2383 conn_num++;
2384
8192edef 2385 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2386 struct sk_buff *skb;
2387
2388 if (skb_queue_empty(&tmp->data_q))
2389 continue;
2390
2391 skb = skb_peek(&tmp->data_q);
2392 if (skb->priority < cur_prio)
2393 continue;
2394
2395 if (skb->priority > cur_prio) {
2396 num = 0;
2397 min = ~0;
2398 cur_prio = skb->priority;
2399 }
2400
2401 num++;
2402
2403 if (conn->sent < min) {
2404 min = conn->sent;
2405 chan = tmp;
2406 }
2407 }
2408
2409 if (hci_conn_num(hdev, type) == conn_num)
2410 break;
2411 }
2412
bf4c6325
GP		 2413 rcu_read_unlock();
2414
73d80deb
LAD		 2415 if (!chan)
2416 return NULL;
2417
2418 switch (chan->conn->type) {
2419 case ACL_LINK:
2420 cnt = hdev->acl_cnt;
2421 break;
2422 case SCO_LINK:
2423 case ESCO_LINK:
2424 cnt = hdev->sco_cnt;
2425 break;
2426 case LE_LINK:
2427 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2428 break;
2429 default:
2430 cnt = 0;
2431 BT_ERR("Unknown link type");
2432 }
2433
2434 q = cnt / num;
2435 *quote = q ? q : 1;
2436 BT_DBG("chan %p quote %d", chan, *quote);
2437 return chan;
2438}
2439
02b20f0b
LAD		 2440static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2441{
2442 struct hci_conn_hash *h = &hdev->conn_hash;
2443 struct hci_conn *conn;
2444 int num = 0;
2445
2446 BT_DBG("%s", hdev->name);
2447
bf4c6325
GP		 2448 rcu_read_lock();
2449
2450 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2451 struct hci_chan *chan;
2452
2453 if (conn->type != type)
2454 continue;
2455
2456 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2457 continue;
2458
2459 num++;
2460
8192edef 2461 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2462 struct sk_buff *skb;
2463
2464 if (chan->sent) {
2465 chan->sent = 0;
2466 continue;
2467 }
2468
2469 if (skb_queue_empty(&chan->data_q))
2470 continue;
2471
2472 skb = skb_peek(&chan->data_q);
2473 if (skb->priority >= HCI_PRIO_MAX - 1)
2474 continue;
2475
2476 skb->priority = HCI_PRIO_MAX - 1;
2477
2478 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2479 skb->priority);
2480 }
2481
2482 if (hci_conn_num(hdev, type) == num)
2483 break;
2484 }
bf4c6325
GP		 2485
2486 rcu_read_unlock();
2487
02b20f0b
LAD		 2488}
2489
b71d385a
AE		 2490static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2491{
2492 /* Calculate count of blocks used by this packet */
2493 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2494}
2495
63d2bc1b 2496static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2497{
1da177e4
LT		 2498 if (!test_bit(HCI_RAW, &hdev->flags)) {
2499 /* ACL tx timeout must be longer than maximum
2500 * link supervision timeout (40.9 seconds) */
63d2bc1b 2501 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
cc48dc0a 2502 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2503 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2504 }
63d2bc1b 2505}
1da177e4 2506
63d2bc1b
AE		 2507static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2508{
2509 unsigned int cnt = hdev->acl_cnt;
2510 struct hci_chan *chan;
2511 struct sk_buff *skb;
2512 int quote;
2513
2514 __check_timeout(hdev, cnt);
04837f64 2515
73d80deb
LAD		 2516 while (hdev->acl_cnt &&
2517 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2518 u32 priority = (skb_peek(&chan->data_q))->priority;
2519 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2520 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2521 skb->len, skb->priority);
2522
ec1cce24
LAD		 2523 /* Stop if priority has changed */
2524 if (skb->priority < priority)
2525 break;
2526
2527 skb = skb_dequeue(&chan->data_q);
2528
73d80deb
LAD		 2529 hci_conn_enter_active_mode(chan->conn,
2530 bt_cb(skb)->force_active);
04837f64 2531
1da177e4
LT		 2532 hci_send_frame(skb);
2533 hdev->acl_last_tx = jiffies;
2534
2535 hdev->acl_cnt--;
73d80deb
LAD		 2536 chan->sent++;
2537 chan->conn->sent++;
1da177e4
LT		 2538 }
2539 }
02b20f0b
LAD		 2540
2541 if (cnt != hdev->acl_cnt)
2542 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2543}
2544
b71d385a
AE		 2545static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2546{
63d2bc1b 2547 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2548 struct hci_chan *chan;
2549 struct sk_buff *skb;
2550 int quote;
b71d385a 2551
63d2bc1b 2552 __check_timeout(hdev, cnt);
b71d385a
AE		 2553
2554 while (hdev->block_cnt > 0 &&
2555 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2556 u32 priority = (skb_peek(&chan->data_q))->priority;
2557 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2558 int blocks;
2559
2560 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2561 skb->len, skb->priority);
2562
2563 /* Stop if priority has changed */
2564 if (skb->priority < priority)
2565 break;
2566
2567 skb = skb_dequeue(&chan->data_q);
2568
2569 blocks = __get_blocks(hdev, skb);
2570 if (blocks > hdev->block_cnt)
2571 return;
2572
2573 hci_conn_enter_active_mode(chan->conn,
2574 bt_cb(skb)->force_active);
2575
2576 hci_send_frame(skb);
2577 hdev->acl_last_tx = jiffies;
2578
2579 hdev->block_cnt -= blocks;
2580 quote -= blocks;
2581
2582 chan->sent += blocks;
2583 chan->conn->sent += blocks;
2584 }
2585 }
2586
2587 if (cnt != hdev->block_cnt)
2588 hci_prio_recalculate(hdev, ACL_LINK);
2589}
2590
2591static inline void hci_sched_acl(struct hci_dev *hdev)
2592{
2593 BT_DBG("%s", hdev->name);
2594
2595 if (!hci_conn_num(hdev, ACL_LINK))
2596 return;
2597
2598 switch (hdev->flow_ctl_mode) {
2599 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2600 hci_sched_acl_pkt(hdev);
2601 break;
2602
2603 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2604 hci_sched_acl_blk(hdev);
2605 break;
2606 }
2607}
2608
1da177e4
LT		 2609/* Schedule SCO */
2610static inline void hci_sched_sco(struct hci_dev *hdev)
2611{
2612 struct hci_conn *conn;
2613 struct sk_buff *skb;
2614 int quote;
2615
2616 BT_DBG("%s", hdev->name);
2617
52087a79
LAD		 2618 if (!hci_conn_num(hdev, SCO_LINK))
2619 return;
2620
1da177e4
LT		 2621 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2622 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2623 BT_DBG("skb %p len %d", skb, skb->len);
2624 hci_send_frame(skb);
2625
2626 conn->sent++;
2627 if (conn->sent == ~0)
2628 conn->sent = 0;
2629 }
2630 }
2631}
2632
b6a0dc82
MH		 2633static inline void hci_sched_esco(struct hci_dev *hdev)
2634{
2635 struct hci_conn *conn;
2636 struct sk_buff *skb;
2637 int quote;
2638
2639 BT_DBG("%s", hdev->name);
2640
52087a79
LAD		 2641 if (!hci_conn_num(hdev, ESCO_LINK))
2642 return;
2643
b6a0dc82
MH		 2644 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2645 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2646 BT_DBG("skb %p len %d", skb, skb->len);
2647 hci_send_frame(skb);
2648
2649 conn->sent++;
2650 if (conn->sent == ~0)
2651 conn->sent = 0;
2652 }
2653 }
2654}
2655
6ed58ec5
VT		 2656static inline void hci_sched_le(struct hci_dev *hdev)
2657{
73d80deb 2658 struct hci_chan *chan;
6ed58ec5 2659 struct sk_buff *skb;
02b20f0b 2660 int quote, cnt, tmp;
6ed58ec5
VT		 2661
2662 BT_DBG("%s", hdev->name);
2663
52087a79
LAD		 2664 if (!hci_conn_num(hdev, LE_LINK))
2665 return;
2666
6ed58ec5
VT		 2667 if (!test_bit(HCI_RAW, &hdev->flags)) {
2668 /* LE tx timeout must be longer than maximum
2669 * link supervision timeout (40.9 seconds) */
bae1f5d9 2670 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2671 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2672 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2673 }
2674
2675 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2676 tmp = cnt;
73d80deb 2677 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2678 u32 priority = (skb_peek(&chan->data_q))->priority;
2679 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2680 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2681 skb->len, skb->priority);
6ed58ec5 2682
ec1cce24
LAD		 2683 /* Stop if priority has changed */
2684 if (skb->priority < priority)
2685 break;
2686
2687 skb = skb_dequeue(&chan->data_q);
2688
6ed58ec5
VT		 2689 hci_send_frame(skb);
2690 hdev->le_last_tx = jiffies;
2691
2692 cnt--;
73d80deb
LAD		 2693 chan->sent++;
2694 chan->conn->sent++;
6ed58ec5
VT		 2695 }
2696 }
73d80deb 2697
6ed58ec5
VT		 2698 if (hdev->le_pkts)
2699 hdev->le_cnt = cnt;
2700 else
2701 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2702
2703 if (cnt != tmp)
2704 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2705}
2706
3eff45ea 2707static void hci_tx_work(struct work_struct *work)
1da177e4 2708{
3eff45ea 2709 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2710 struct sk_buff *skb;
2711
6ed58ec5
VT		 2712 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2713 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2714
2715 /* Schedule queues and send stuff to HCI driver */
2716
2717 hci_sched_acl(hdev);
2718
2719 hci_sched_sco(hdev);
2720
b6a0dc82
MH		 2721 hci_sched_esco(hdev);
2722
6ed58ec5
VT		 2723 hci_sched_le(hdev);
2724
1da177e4
LT		 2725 /* Send next queued raw (unknown type) packet */
2726 while ((skb = skb_dequeue(&hdev->raw_q)))
2727 hci_send_frame(skb);
1da177e4
LT		 2728}
2729
25985edc 2730/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2731
2732/* ACL data packet */
2733static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2734{
2735 struct hci_acl_hdr *hdr = (void *) skb->data;
2736 struct hci_conn *conn;
2737 __u16 handle, flags;
2738
2739 skb_pull(skb, HCI_ACL_HDR_SIZE);
2740
2741 handle = __le16_to_cpu(hdr->handle);
2742 flags = hci_flags(handle);
2743 handle = hci_handle(handle);
2744
2745 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2746
2747 hdev->stat.acl_rx++;
2748
2749 hci_dev_lock(hdev);
2750 conn = hci_conn_hash_lookup_handle(hdev, handle);
2751 hci_dev_unlock(hdev);
8e87d142 2752
1da177e4 2753 if (conn) {
65983fc7 2754 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2755
1da177e4 2756 /* Send to upper protocol */
686ebf28
UF		 2757 l2cap_recv_acldata(conn, skb, flags);
2758 return;
1da177e4 2759 } else {
8e87d142 2760 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2761 hdev->name, handle);
2762 }
2763
2764 kfree_skb(skb);
2765}
2766
2767/* SCO data packet */
2768static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2769{
2770 struct hci_sco_hdr *hdr = (void *) skb->data;
2771 struct hci_conn *conn;
2772 __u16 handle;
2773
2774 skb_pull(skb, HCI_SCO_HDR_SIZE);
2775
2776 handle = __le16_to_cpu(hdr->handle);
2777
2778 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2779
2780 hdev->stat.sco_rx++;
2781
2782 hci_dev_lock(hdev);
2783 conn = hci_conn_hash_lookup_handle(hdev, handle);
2784 hci_dev_unlock(hdev);
2785
2786 if (conn) {
1da177e4 2787 /* Send to upper protocol */
686ebf28
UF		 2788 sco_recv_scodata(conn, skb);
2789 return;
1da177e4 2790 } else {
8e87d142 2791 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2792 hdev->name, handle);
2793 }
2794
2795 kfree_skb(skb);
2796}
2797
b78752cc 2798static void hci_rx_work(struct work_struct *work)
1da177e4 2799{
b78752cc 2800 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2801 struct sk_buff *skb;
2802
2803 BT_DBG("%s", hdev->name);
2804
1da177e4 2805 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2806 /* Send copy to monitor */
2807 hci_send_to_monitor(hdev, skb);
2808
1da177e4
LT		 2809 if (atomic_read(&hdev->promisc)) {
2810 /* Send copy to the sockets */
470fe1b5 2811 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2812 }
2813
2814 if (test_bit(HCI_RAW, &hdev->flags)) {
2815 kfree_skb(skb);
2816 continue;
2817 }
2818
2819 if (test_bit(HCI_INIT, &hdev->flags)) {
2820 /* Don't process data packets in this states. */
0d48d939 2821 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2822 case HCI_ACLDATA_PKT:
2823 case HCI_SCODATA_PKT:
2824 kfree_skb(skb);
2825 continue;
3ff50b79 2826 }
1da177e4
LT		 2827 }
2828
2829 /* Process frame */
0d48d939 2830 switch (bt_cb(skb)->pkt_type) {
1da177e4 2831 case HCI_EVENT_PKT:
b78752cc 2832 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2833 hci_event_packet(hdev, skb);
2834 break;
2835
2836 case HCI_ACLDATA_PKT:
2837 BT_DBG("%s ACL data packet", hdev->name);
2838 hci_acldata_packet(hdev, skb);
2839 break;
2840
2841 case HCI_SCODATA_PKT:
2842 BT_DBG("%s SCO data packet", hdev->name);
2843 hci_scodata_packet(hdev, skb);
2844 break;
2845
2846 default:
2847 kfree_skb(skb);
2848 break;
2849 }
2850 }
1da177e4
LT		 2851}
2852
c347b765 2853static void hci_cmd_work(struct work_struct *work)
1da177e4 2854{
c347b765 2855 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2856 struct sk_buff *skb;
2857
2858 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2859
1da177e4 2860 /* Send queued commands */
5a08ecce
AE		 2861 if (atomic_read(&hdev->cmd_cnt)) {
2862 skb = skb_dequeue(&hdev->cmd_q);
2863 if (!skb)
2864 return;
2865
7585b97a 2866 kfree_skb(hdev->sent_cmd);
1da177e4 2867
70f23020
AE		 2868 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2869 if (hdev->sent_cmd) {
1da177e4
LT		 2870 atomic_dec(&hdev->cmd_cnt);
2871 hci_send_frame(skb);
7bdb8a5c
SJ		 2872 if (test_bit(HCI_RESET, &hdev->flags))
2873 del_timer(&hdev->cmd_timer);
2874 else
2875 mod_timer(&hdev->cmd_timer,
6bd32326 2876 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2877 } else {
2878 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2879 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2880 }
2881 }
2882}
2519a1fc
AG		 2883
2884int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2885{
2886 /* General inquiry access code (GIAC) */
2887 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2888 struct hci_cp_inquiry cp;
2889
2890 BT_DBG("%s", hdev->name);
2891
2892 if (test_bit(HCI_INQUIRY, &hdev->flags))
2893 return -EINPROGRESS;
2894
4663262c
JH		 2895 inquiry_cache_flush(hdev);
2896
2519a1fc
AG		 2897 memset(&cp, 0, sizeof(cp));
2898 memcpy(&cp.lap, lap, sizeof(cp.lap));
2899 cp.length = length;
2900
2901 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2902}
023d5049
AG		 2903
2904int hci_cancel_inquiry(struct hci_dev *hdev)
2905{
2906 BT_DBG("%s", hdev->name);
2907
2908 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2909 return -EPERM;
2910
2911 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2912}
kernel source for telekom puls (alcatel/mediatek)