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Bluetooth: Fix coding style in hci_conn.c
[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
70f23020 48#include <linux/uaccess.h>
1da177e4
LT		 49#include <asm/unaligned.h>
50
51#include <net/bluetooth/bluetooth.h>
52#include <net/bluetooth/hci_core.h>
53
ab81cbf9
JH		 54#define AUTO_OFF_TIMEOUT 2000
55
b78752cc 56static void hci_rx_work(struct work_struct *work);
c347b765 57static void hci_cmd_work(struct work_struct *work);
3eff45ea 58static void hci_tx_work(struct work_struct *work);
1da177e4 59
1da177e4
LT		 60/* HCI device list */
61LIST_HEAD(hci_dev_list);
62DEFINE_RWLOCK(hci_dev_list_lock);
63
64/* HCI callback list */
65LIST_HEAD(hci_cb_list);
66DEFINE_RWLOCK(hci_cb_list_lock);
67
1da177e4
LT		 68/* ---- HCI notifications ---- */
69
6516455d 70static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 71{
040030ef 72 hci_sock_dev_event(hdev, event);
1da177e4
LT		 73}
74
75/* ---- HCI requests ---- */
76
23bb5763 77void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 78{
23bb5763
JH		 79 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
80
a5040efa
JH		 81 /* If this is the init phase check if the completed command matches
82 * the last init command, and if not just return.
83 */
75fb0e32
JH		 84 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
85 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1036b890 86 u16 opcode = __le16_to_cpu(sent->opcode);
75fb0e32
JH		 87 struct sk_buff *skb;
88
89 /* Some CSR based controllers generate a spontaneous
90 * reset complete event during init and any pending
91 * command will never be completed. In such a case we
92 * need to resend whatever was the last sent
93 * command.
94 */
95
1036b890 96 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
75fb0e32
JH		 97 return;
98
99 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
100 if (skb) {
101 skb_queue_head(&hdev->cmd_q, skb);
102 queue_work(hdev->workqueue, &hdev->cmd_work);
103 }
104
23bb5763 105 return;
75fb0e32 106 }
1da177e4
LT		 107
108 if (hdev->req_status == HCI_REQ_PEND) {
109 hdev->req_result = result;
110 hdev->req_status = HCI_REQ_DONE;
111 wake_up_interruptible(&hdev->req_wait_q);
112 }
113}
114
115static void hci_req_cancel(struct hci_dev *hdev, int err)
116{
117 BT_DBG("%s err 0x%2.2x", hdev->name, err);
118
119 if (hdev->req_status == HCI_REQ_PEND) {
120 hdev->req_result = err;
121 hdev->req_status = HCI_REQ_CANCELED;
122 wake_up_interruptible(&hdev->req_wait_q);
123 }
124}
125
126/* Execute request and wait for completion. */
8e87d142 127static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 128 unsigned long opt, __u32 timeout)
1da177e4
LT		 129{
130 DECLARE_WAITQUEUE(wait, current);
131 int err = 0;
132
133 BT_DBG("%s start", hdev->name);
134
135 hdev->req_status = HCI_REQ_PEND;
136
137 add_wait_queue(&hdev->req_wait_q, &wait);
138 set_current_state(TASK_INTERRUPTIBLE);
139
140 req(hdev, opt);
141 schedule_timeout(timeout);
142
143 remove_wait_queue(&hdev->req_wait_q, &wait);
144
145 if (signal_pending(current))
146 return -EINTR;
147
148 switch (hdev->req_status) {
149 case HCI_REQ_DONE:
e175072f 150 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 151 break;
152
153 case HCI_REQ_CANCELED:
154 err = -hdev->req_result;
155 break;
156
157 default:
158 err = -ETIMEDOUT;
159 break;
3ff50b79 160 }
1da177e4 161
a5040efa 162 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 163
164 BT_DBG("%s end: err %d", hdev->name, err);
165
166 return err;
167}
168
169static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 170 unsigned long opt, __u32 timeout)
1da177e4
LT		 171{
172 int ret;
173
7c6a329e
MH		 174 if (!test_bit(HCI_UP, &hdev->flags))
175 return -ENETDOWN;
176
1da177e4
LT		 177 /* Serialize all requests */
178 hci_req_lock(hdev);
179 ret = __hci_request(hdev, req, opt, timeout);
180 hci_req_unlock(hdev);
181
182 return ret;
183}
184
185static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
186{
187 BT_DBG("%s %ld", hdev->name, opt);
188
189 /* Reset device */
f630cf0d 190 set_bit(HCI_RESET, &hdev->flags);
a9de9248 191 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 192}
193
e61ef499 194static void bredr_init(struct hci_dev *hdev)
1da177e4 195{
b0916ea0 196 struct hci_cp_delete_stored_link_key cp;
1ebb9252 197 __le16 param;
89f2783d 198 __u8 flt_type;
1da177e4 199
2455a3ea
AE		 200 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
201
1da177e4
LT		 202 /* Mandatory initialization */
203
204 /* Reset */
f630cf0d 205 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
e61ef499
AE		 206 set_bit(HCI_RESET, &hdev->flags);
207 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 208 }
1da177e4
LT		 209
210 /* Read Local Supported Features */
a9de9248 211 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 212
1143e5a6 213 /* Read Local Version */
a9de9248 214 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 215
1da177e4 216 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 217 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 218
1da177e4 219 /* Read BD Address */
a9de9248
MH		 220 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
221
222 /* Read Class of Device */
223 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
224
225 /* Read Local Name */
226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 227
228 /* Read Voice Setting */
a9de9248 229 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 230
231 /* Optional initialization */
232
233 /* Clear Event Filters */
89f2783d 234 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 235 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 236
1da177e4 237 /* Connection accept timeout ~20 secs */
aca3192c 238 param = cpu_to_le16(0x7d00);
a9de9248 239 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 240
241 bacpy(&cp.bdaddr, BDADDR_ANY);
242 cp.delete_all = 1;
243 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 244}
245
e61ef499
AE		 246static void amp_init(struct hci_dev *hdev)
247{
2455a3ea
AE		 248 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
249
e61ef499
AE		 250 /* Reset */
251 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
252
253 /* Read Local Version */
254 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 255
256 /* Read Local AMP Info */
257 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e61ef499
AE		 258}
259
260static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
261{
262 struct sk_buff *skb;
263
264 BT_DBG("%s %ld", hdev->name, opt);
265
266 /* Driver initialization */
267
268 /* Special commands */
269 while ((skb = skb_dequeue(&hdev->driver_init))) {
270 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
271 skb->dev = (void *) hdev;
272
273 skb_queue_tail(&hdev->cmd_q, skb);
274 queue_work(hdev->workqueue, &hdev->cmd_work);
275 }
276 skb_queue_purge(&hdev->driver_init);
277
278 switch (hdev->dev_type) {
279 case HCI_BREDR:
280 bredr_init(hdev);
281 break;
282
283 case HCI_AMP:
284 amp_init(hdev);
285 break;
286
287 default:
288 BT_ERR("Unknown device type %d", hdev->dev_type);
289 break;
290 }
291
292}
293
6ed58ec5
VT		 294static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
295{
296 BT_DBG("%s", hdev->name);
297
298 /* Read LE buffer size */
299 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
300}
301
1da177e4
LT		 302static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
303{
304 __u8 scan = opt;
305
306 BT_DBG("%s %x", hdev->name, scan);
307
308 /* Inquiry and Page scans */
a9de9248 309 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 310}
311
312static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
313{
314 __u8 auth = opt;
315
316 BT_DBG("%s %x", hdev->name, auth);
317
318 /* Authentication */
a9de9248 319 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 320}
321
322static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
323{
324 __u8 encrypt = opt;
325
326 BT_DBG("%s %x", hdev->name, encrypt);
327
e4e8e37c 328 /* Encryption */
a9de9248 329 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 330}
331
e4e8e37c
MH		 332static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
333{
334 __le16 policy = cpu_to_le16(opt);
335
a418b893 336 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 337
338 /* Default link policy */
339 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
340}
341
8e87d142 342/* Get HCI device by index.
1da177e4
LT		 343 * Device is held on return. */
344struct hci_dev *hci_dev_get(int index)
345{
8035ded4 346 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 347
348 BT_DBG("%d", index);
349
350 if (index < 0)
351 return NULL;
352
353 read_lock(&hci_dev_list_lock);
8035ded4 354 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 355 if (d->id == index) {
356 hdev = hci_dev_hold(d);
357 break;
358 }
359 }
360 read_unlock(&hci_dev_list_lock);
361 return hdev;
362}
1da177e4
LT		 363
364/* ---- Inquiry support ---- */
ff9ef578 365
30dc78e1
JH		 366bool hci_discovery_active(struct hci_dev *hdev)
367{
368 struct discovery_state *discov = &hdev->discovery;
369
6fbe195d 370 switch (discov->state) {
343f935b 371 case DISCOVERY_FINDING:
6fbe195d 372 case DISCOVERY_RESOLVING:
30dc78e1
JH		 373 return true;
374
6fbe195d
AG		 375 default:
376 return false;
377 }
30dc78e1
JH		 378}
379
ff9ef578
JH		 380void hci_discovery_set_state(struct hci_dev *hdev, int state)
381{
382 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
383
384 if (hdev->discovery.state == state)
385 return;
386
387 switch (state) {
388 case DISCOVERY_STOPPED:
7b99b659
AG		 389 if (hdev->discovery.state != DISCOVERY_STARTING)
390 mgmt_discovering(hdev, 0);
ff9ef578
JH		 391 break;
392 case DISCOVERY_STARTING:
393 break;
343f935b 394 case DISCOVERY_FINDING:
ff9ef578
JH		 395 mgmt_discovering(hdev, 1);
396 break;
30dc78e1
JH		 397 case DISCOVERY_RESOLVING:
398 break;
ff9ef578
JH		 399 case DISCOVERY_STOPPING:
400 break;
401 }
402
403 hdev->discovery.state = state;
404}
405
1da177e4
LT		 406static void inquiry_cache_flush(struct hci_dev *hdev)
407{
30883512 408 struct discovery_state *cache = &hdev->discovery;
b57c1a56 409 struct inquiry_entry *p, *n;
1da177e4 410
561aafbc
JH		 411 list_for_each_entry_safe(p, n, &cache->all, all) {
412 list_del(&p->all);
b57c1a56 413 kfree(p);
1da177e4 414 }
561aafbc
JH		 415
416 INIT_LIST_HEAD(&cache->unknown);
417 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 418}
419
420struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
421{
30883512 422 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 423 struct inquiry_entry *e;
424
425 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
426
561aafbc
JH		 427 list_for_each_entry(e, &cache->all, all) {
428 if (!bacmp(&e->data.bdaddr, bdaddr))
429 return e;
430 }
431
432 return NULL;
433}
434
435struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 436 bdaddr_t *bdaddr)
561aafbc 437{
30883512 438 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 439 struct inquiry_entry *e;
440
441 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
442
443 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 444 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 445 return e;
446 }
447
448 return NULL;
1da177e4
LT		 449}
450
30dc78e1 451struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 452 bdaddr_t *bdaddr,
453 int state)
30dc78e1
JH		 454{
455 struct discovery_state *cache = &hdev->discovery;
456 struct inquiry_entry *e;
457
458 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
459
460 list_for_each_entry(e, &cache->resolve, list) {
461 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
462 return e;
463 if (!bacmp(&e->data.bdaddr, bdaddr))
464 return e;
465 }
466
467 return NULL;
468}
469
a3d4e20a 470void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 471 struct inquiry_entry *ie)
a3d4e20a
JH		 472{
473 struct discovery_state *cache = &hdev->discovery;
474 struct list_head *pos = &cache->resolve;
475 struct inquiry_entry *p;
476
477 list_del(&ie->list);
478
479 list_for_each_entry(p, &cache->resolve, list) {
480 if (p->name_state != NAME_PENDING &&
481 abs(p->data.rssi) >= abs(ie->data.rssi))
482 break;
483 pos = &p->list;
484 }
485
486 list_add(&ie->list, pos);
487}
488
3175405b 489bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 490 bool name_known, bool *ssp)
1da177e4 491{
30883512 492 struct discovery_state *cache = &hdev->discovery;
70f23020 493 struct inquiry_entry *ie;
1da177e4
LT		 494
495 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
496
388fc8fa
JH		 497 if (ssp)
498 *ssp = data->ssp_mode;
499
70f23020 500 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 501 if (ie) {
388fc8fa
JH		 502 if (ie->data.ssp_mode && ssp)
503 *ssp = true;
504
a3d4e20a
JH		 505 if (ie->name_state == NAME_NEEDED &&
506 data->rssi != ie->data.rssi) {
507 ie->data.rssi = data->rssi;
508 hci_inquiry_cache_update_resolve(hdev, ie);
509 }
510
561aafbc 511 goto update;
a3d4e20a 512 }
561aafbc
JH		 513
514 /* Entry not in the cache. Add new one. */
515 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
516 if (!ie)
3175405b 517 return false;
561aafbc
JH		 518
519 list_add(&ie->all, &cache->all);
520
521 if (name_known) {
522 ie->name_state = NAME_KNOWN;
523 } else {
524 ie->name_state = NAME_NOT_KNOWN;
525 list_add(&ie->list, &cache->unknown);
526 }
70f23020 527
561aafbc
JH		 528update:
529 if (name_known && ie->name_state != NAME_KNOWN &&
530 ie->name_state != NAME_PENDING) {
531 ie->name_state = NAME_KNOWN;
532 list_del(&ie->list);
1da177e4
LT		 533 }
534
70f23020
AE		 535 memcpy(&ie->data, data, sizeof(*data));
536 ie->timestamp = jiffies;
1da177e4 537 cache->timestamp = jiffies;
3175405b
JH		 538
539 if (ie->name_state == NAME_NOT_KNOWN)
540 return false;
541
542 return true;
1da177e4
LT		 543}
544
545static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
546{
30883512 547 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 548 struct inquiry_info *info = (struct inquiry_info *) buf;
549 struct inquiry_entry *e;
550 int copied = 0;
551
561aafbc 552 list_for_each_entry(e, &cache->all, all) {
1da177e4 553 struct inquiry_data *data = &e->data;
b57c1a56
JH		 554
555 if (copied >= num)
556 break;
557
1da177e4
LT		 558 bacpy(&info->bdaddr, &data->bdaddr);
559 info->pscan_rep_mode = data->pscan_rep_mode;
560 info->pscan_period_mode = data->pscan_period_mode;
561 info->pscan_mode = data->pscan_mode;
562 memcpy(info->dev_class, data->dev_class, 3);
563 info->clock_offset = data->clock_offset;
b57c1a56 564
1da177e4 565 info++;
b57c1a56 566 copied++;
1da177e4
LT		 567 }
568
569 BT_DBG("cache %p, copied %d", cache, copied);
570 return copied;
571}
572
573static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
574{
575 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
576 struct hci_cp_inquiry cp;
577
578 BT_DBG("%s", hdev->name);
579
580 if (test_bit(HCI_INQUIRY, &hdev->flags))
581 return;
582
583 /* Start Inquiry */
584 memcpy(&cp.lap, &ir->lap, 3);
585 cp.length = ir->length;
586 cp.num_rsp = ir->num_rsp;
a9de9248 587 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 588}
589
590int hci_inquiry(void __user *arg)
591{
592 __u8 __user *ptr = arg;
593 struct hci_inquiry_req ir;
594 struct hci_dev *hdev;
595 int err = 0, do_inquiry = 0, max_rsp;
596 long timeo;
597 __u8 *buf;
598
599 if (copy_from_user(&ir, ptr, sizeof(ir)))
600 return -EFAULT;
601
5a08ecce
AE		 602 hdev = hci_dev_get(ir.dev_id);
603 if (!hdev)
1da177e4
LT		 604 return -ENODEV;
605
09fd0de5 606 hci_dev_lock(hdev);
8e87d142 607 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 608 inquiry_cache_empty(hdev) ||
609 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 610 inquiry_cache_flush(hdev);
611 do_inquiry = 1;
612 }
09fd0de5 613 hci_dev_unlock(hdev);
1da177e4 614
04837f64 615 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 616
617 if (do_inquiry) {
618 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
619 if (err < 0)
620 goto done;
621 }
1da177e4
LT		 622
623 /* for unlimited number of responses we will use buffer with 255 entries */
624 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
625
626 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
627 * copy it to the user space.
628 */
01df8c31 629 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 630 if (!buf) {
1da177e4
LT		 631 err = -ENOMEM;
632 goto done;
633 }
634
09fd0de5 635 hci_dev_lock(hdev);
1da177e4 636 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 637 hci_dev_unlock(hdev);
1da177e4
LT		 638
639 BT_DBG("num_rsp %d", ir.num_rsp);
640
641 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
642 ptr += sizeof(ir);
643 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
644 ir.num_rsp))
645 err = -EFAULT;
8e87d142 646 } else
1da177e4
LT		 647 err = -EFAULT;
648
649 kfree(buf);
650
651done:
652 hci_dev_put(hdev);
653 return err;
654}
655
656/* ---- HCI ioctl helpers ---- */
657
658int hci_dev_open(__u16 dev)
659{
660 struct hci_dev *hdev;
661 int ret = 0;
662
5a08ecce
AE		 663 hdev = hci_dev_get(dev);
664 if (!hdev)
1da177e4
LT		 665 return -ENODEV;
666
667 BT_DBG("%s %p", hdev->name, hdev);
668
669 hci_req_lock(hdev);
670
94324962
JH		 671 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
672 ret = -ENODEV;
673 goto done;
674 }
675
611b30f7
MH		 676 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
677 ret = -ERFKILL;
678 goto done;
679 }
680
1da177e4
LT		 681 if (test_bit(HCI_UP, &hdev->flags)) {
682 ret = -EALREADY;
683 goto done;
684 }
685
686 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
687 set_bit(HCI_RAW, &hdev->flags);
688
07e3b94a
AE		 689 /* Treat all non BR/EDR controllers as raw devices if
690 enable_hs is not set */
691 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 692 set_bit(HCI_RAW, &hdev->flags);
693
1da177e4
LT		 694 if (hdev->open(hdev)) {
695 ret = -EIO;
696 goto done;
697 }
698
699 if (!test_bit(HCI_RAW, &hdev->flags)) {
700 atomic_set(&hdev->cmd_cnt, 1);
701 set_bit(HCI_INIT, &hdev->flags);
a5040efa 702 hdev->init_last_cmd = 0;
1da177e4 703
04837f64
MH		 704 ret = __hci_request(hdev, hci_init_req, 0,
705 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 706
eead27da 707 if (lmp_host_le_capable(hdev))
6ed58ec5
VT		 708 ret = __hci_request(hdev, hci_le_init_req, 0,
709 msecs_to_jiffies(HCI_INIT_TIMEOUT));
710
1da177e4
LT		 711 clear_bit(HCI_INIT, &hdev->flags);
712 }
713
714 if (!ret) {
715 hci_dev_hold(hdev);
716 set_bit(HCI_UP, &hdev->flags);
717 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 718 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 719 hci_dev_lock(hdev);
744cf19e 720 mgmt_powered(hdev, 1);
09fd0de5 721 hci_dev_unlock(hdev);
56e5cb86 722 }
8e87d142 723 } else {
1da177e4 724 /* Init failed, cleanup */
3eff45ea 725 flush_work(&hdev->tx_work);
c347b765 726 flush_work(&hdev->cmd_work);
b78752cc 727 flush_work(&hdev->rx_work);
1da177e4
LT		 728
729 skb_queue_purge(&hdev->cmd_q);
730 skb_queue_purge(&hdev->rx_q);
731
732 if (hdev->flush)
733 hdev->flush(hdev);
734
735 if (hdev->sent_cmd) {
736 kfree_skb(hdev->sent_cmd);
737 hdev->sent_cmd = NULL;
738 }
739
740 hdev->close(hdev);
741 hdev->flags = 0;
742 }
743
744done:
745 hci_req_unlock(hdev);
746 hci_dev_put(hdev);
747 return ret;
748}
749
750static int hci_dev_do_close(struct hci_dev *hdev)
751{
752 BT_DBG("%s %p", hdev->name, hdev);
753
28b75a89
AG		 754 cancel_work_sync(&hdev->le_scan);
755
1da177e4
LT		 756 hci_req_cancel(hdev, ENODEV);
757 hci_req_lock(hdev);
758
759 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 760 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 761 hci_req_unlock(hdev);
762 return 0;
763 }
764
3eff45ea
GP		 765 /* Flush RX and TX works */
766 flush_work(&hdev->tx_work);
b78752cc 767 flush_work(&hdev->rx_work);
1da177e4 768
16ab91ab 769 if (hdev->discov_timeout > 0) {
e0f9309f 770 cancel_delayed_work(&hdev->discov_off);
16ab91ab 771 hdev->discov_timeout = 0;
5e5282bb 772 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 773 }
774
a8b2d5c2 775 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 776 cancel_delayed_work(&hdev->service_cache);
777
7ba8b4be
AG		 778 cancel_delayed_work_sync(&hdev->le_scan_disable);
779
09fd0de5 780 hci_dev_lock(hdev);
1da177e4
LT		 781 inquiry_cache_flush(hdev);
782 hci_conn_hash_flush(hdev);
09fd0de5 783 hci_dev_unlock(hdev);
1da177e4
LT		 784
785 hci_notify(hdev, HCI_DEV_DOWN);
786
787 if (hdev->flush)
788 hdev->flush(hdev);
789
790 /* Reset device */
791 skb_queue_purge(&hdev->cmd_q);
792 atomic_set(&hdev->cmd_cnt, 1);
8af59467
JH		 793 if (!test_bit(HCI_RAW, &hdev->flags) &&
794 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
1da177e4 795 set_bit(HCI_INIT, &hdev->flags);
04837f64 796 __hci_request(hdev, hci_reset_req, 0,
cad44c2b 797 msecs_to_jiffies(250));
1da177e4
LT		 798 clear_bit(HCI_INIT, &hdev->flags);
799 }
800
c347b765
GP		 801 /* flush cmd work */
802 flush_work(&hdev->cmd_work);
1da177e4
LT		 803
804 /* Drop queues */
805 skb_queue_purge(&hdev->rx_q);
806 skb_queue_purge(&hdev->cmd_q);
807 skb_queue_purge(&hdev->raw_q);
808
809 /* Drop last sent command */
810 if (hdev->sent_cmd) {
b79f44c1 811 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 812 kfree_skb(hdev->sent_cmd);
813 hdev->sent_cmd = NULL;
814 }
815
816 /* After this point our queues are empty
817 * and no tasks are scheduled. */
818 hdev->close(hdev);
819
8ee56540
MH		 820 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
821 hci_dev_lock(hdev);
822 mgmt_powered(hdev, 0);
823 hci_dev_unlock(hdev);
824 }
5add6af8 825
1da177e4
LT		 826 /* Clear flags */
827 hdev->flags = 0;
828
e59fda8d 829 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 830 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 831
1da177e4
LT		 832 hci_req_unlock(hdev);
833
834 hci_dev_put(hdev);
835 return 0;
836}
837
838int hci_dev_close(__u16 dev)
839{
840 struct hci_dev *hdev;
841 int err;
842
70f23020
AE		 843 hdev = hci_dev_get(dev);
844 if (!hdev)
1da177e4 845 return -ENODEV;
8ee56540
MH		 846
847 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
848 cancel_delayed_work(&hdev->power_off);
849
1da177e4 850 err = hci_dev_do_close(hdev);
8ee56540 851
1da177e4
LT		 852 hci_dev_put(hdev);
853 return err;
854}
855
856int hci_dev_reset(__u16 dev)
857{
858 struct hci_dev *hdev;
859 int ret = 0;
860
70f23020
AE		 861 hdev = hci_dev_get(dev);
862 if (!hdev)
1da177e4
LT		 863 return -ENODEV;
864
865 hci_req_lock(hdev);
1da177e4
LT		 866
867 if (!test_bit(HCI_UP, &hdev->flags))
868 goto done;
869
870 /* Drop queues */
871 skb_queue_purge(&hdev->rx_q);
872 skb_queue_purge(&hdev->cmd_q);
873
09fd0de5 874 hci_dev_lock(hdev);
1da177e4
LT		 875 inquiry_cache_flush(hdev);
876 hci_conn_hash_flush(hdev);
09fd0de5 877 hci_dev_unlock(hdev);
1da177e4
LT		 878
879 if (hdev->flush)
880 hdev->flush(hdev);
881
8e87d142 882 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 883 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 884
885 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 886 ret = __hci_request(hdev, hci_reset_req, 0,
887 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 888
889done:
1da177e4
LT		 890 hci_req_unlock(hdev);
891 hci_dev_put(hdev);
892 return ret;
893}
894
895int hci_dev_reset_stat(__u16 dev)
896{
897 struct hci_dev *hdev;
898 int ret = 0;
899
70f23020
AE		 900 hdev = hci_dev_get(dev);
901 if (!hdev)
1da177e4
LT		 902 return -ENODEV;
903
904 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
905
906 hci_dev_put(hdev);
907
908 return ret;
909}
910
911int hci_dev_cmd(unsigned int cmd, void __user *arg)
912{
913 struct hci_dev *hdev;
914 struct hci_dev_req dr;
915 int err = 0;
916
917 if (copy_from_user(&dr, arg, sizeof(dr)))
918 return -EFAULT;
919
70f23020
AE		 920 hdev = hci_dev_get(dr.dev_id);
921 if (!hdev)
1da177e4
LT		 922 return -ENODEV;
923
924 switch (cmd) {
925 case HCISETAUTH:
04837f64
MH		 926 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
927 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 928 break;
929
930 case HCISETENCRYPT:
931 if (!lmp_encrypt_capable(hdev)) {
932 err = -EOPNOTSUPP;
933 break;
934 }
935
936 if (!test_bit(HCI_AUTH, &hdev->flags)) {
937 /* Auth must be enabled first */
04837f64
MH		 938 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
939 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 940 if (err)
941 break;
942 }
943
04837f64
MH		 944 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
945 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 946 break;
947
948 case HCISETSCAN:
04837f64
MH		 949 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
950 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 951 break;
952
1da177e4 953 case HCISETLINKPOL:
e4e8e37c
MH		 954 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
955 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 956 break;
957
958 case HCISETLINKMODE:
e4e8e37c
MH		 959 hdev->link_mode = ((__u16) dr.dev_opt) &
960 (HCI_LM_MASTER | HCI_LM_ACCEPT);
961 break;
962
963 case HCISETPTYPE:
964 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 965 break;
966
967 case HCISETACLMTU:
e4e8e37c
MH		 968 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
969 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 970 break;
971
972 case HCISETSCOMTU:
e4e8e37c
MH		 973 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
974 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 975 break;
976
977 default:
978 err = -EINVAL;
979 break;
980 }
e4e8e37c 981
1da177e4
LT		 982 hci_dev_put(hdev);
983 return err;
984}
985
986int hci_get_dev_list(void __user *arg)
987{
8035ded4 988 struct hci_dev *hdev;
1da177e4
LT		 989 struct hci_dev_list_req *dl;
990 struct hci_dev_req *dr;
1da177e4
LT		 991 int n = 0, size, err;
992 __u16 dev_num;
993
994 if (get_user(dev_num, (__u16 __user *) arg))
995 return -EFAULT;
996
997 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
998 return -EINVAL;
999
1000 size = sizeof(*dl) + dev_num * sizeof(*dr);
1001
70f23020
AE		 1002 dl = kzalloc(size, GFP_KERNEL);
1003 if (!dl)
1da177e4
LT		 1004 return -ENOMEM;
1005
1006 dr = dl->dev_req;
1007
f20d09d5 1008 read_lock(&hci_dev_list_lock);
8035ded4 1009 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1010 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1011 cancel_delayed_work(&hdev->power_off);
c542a06c 1012
a8b2d5c2
JH		 1013 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1014 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1015
1da177e4
LT		 1016 (dr + n)->dev_id = hdev->id;
1017 (dr + n)->dev_opt = hdev->flags;
c542a06c 1018
1da177e4
LT		 1019 if (++n >= dev_num)
1020 break;
1021 }
f20d09d5 1022 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1023
1024 dl->dev_num = n;
1025 size = sizeof(*dl) + n * sizeof(*dr);
1026
1027 err = copy_to_user(arg, dl, size);
1028 kfree(dl);
1029
1030 return err ? -EFAULT : 0;
1031}
1032
1033int hci_get_dev_info(void __user *arg)
1034{
1035 struct hci_dev *hdev;
1036 struct hci_dev_info di;
1037 int err = 0;
1038
1039 if (copy_from_user(&di, arg, sizeof(di)))
1040 return -EFAULT;
1041
70f23020
AE		 1042 hdev = hci_dev_get(di.dev_id);
1043 if (!hdev)
1da177e4
LT		 1044 return -ENODEV;
1045
a8b2d5c2 1046 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1047 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1048
a8b2d5c2
JH		 1049 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1050 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1051
1da177e4
LT		 1052 strcpy(di.name, hdev->name);
1053 di.bdaddr = hdev->bdaddr;
943da25d 1054 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1055 di.flags = hdev->flags;
1056 di.pkt_type = hdev->pkt_type;
1057 di.acl_mtu = hdev->acl_mtu;
1058 di.acl_pkts = hdev->acl_pkts;
1059 di.sco_mtu = hdev->sco_mtu;
1060 di.sco_pkts = hdev->sco_pkts;
1061 di.link_policy = hdev->link_policy;
1062 di.link_mode = hdev->link_mode;
1063
1064 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1065 memcpy(&di.features, &hdev->features, sizeof(di.features));
1066
1067 if (copy_to_user(arg, &di, sizeof(di)))
1068 err = -EFAULT;
1069
1070 hci_dev_put(hdev);
1071
1072 return err;
1073}
1074
1075/* ---- Interface to HCI drivers ---- */
1076
611b30f7
MH		 1077static int hci_rfkill_set_block(void *data, bool blocked)
1078{
1079 struct hci_dev *hdev = data;
1080
1081 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1082
1083 if (!blocked)
1084 return 0;
1085
1086 hci_dev_do_close(hdev);
1087
1088 return 0;
1089}
1090
1091static const struct rfkill_ops hci_rfkill_ops = {
1092 .set_block = hci_rfkill_set_block,
1093};
1094
ab81cbf9
JH		 1095static void hci_power_on(struct work_struct *work)
1096{
1097 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1098
1099 BT_DBG("%s", hdev->name);
1100
1101 if (hci_dev_open(hdev->id) < 0)
1102 return;
1103
a8b2d5c2 1104 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1105 schedule_delayed_work(&hdev->power_off,
3243553f 1106 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1107
a8b2d5c2 1108 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1109 mgmt_index_added(hdev);
ab81cbf9
JH		 1110}
1111
1112static void hci_power_off(struct work_struct *work)
1113{
3243553f
JH		 1114 struct hci_dev *hdev = container_of(work, struct hci_dev,
1115 power_off.work);
ab81cbf9
JH		 1116
1117 BT_DBG("%s", hdev->name);
1118
8ee56540 1119 hci_dev_do_close(hdev);
ab81cbf9
JH		 1120}
1121
16ab91ab
JH		 1122static void hci_discov_off(struct work_struct *work)
1123{
1124 struct hci_dev *hdev;
1125 u8 scan = SCAN_PAGE;
1126
1127 hdev = container_of(work, struct hci_dev, discov_off.work);
1128
1129 BT_DBG("%s", hdev->name);
1130
09fd0de5 1131 hci_dev_lock(hdev);
16ab91ab
JH		 1132
1133 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1134
1135 hdev->discov_timeout = 0;
1136
09fd0de5 1137 hci_dev_unlock(hdev);
16ab91ab
JH		 1138}
1139
2aeb9a1a
JH		 1140int hci_uuids_clear(struct hci_dev *hdev)
1141{
1142 struct list_head *p, *n;
1143
1144 list_for_each_safe(p, n, &hdev->uuids) {
1145 struct bt_uuid *uuid;
1146
1147 uuid = list_entry(p, struct bt_uuid, list);
1148
1149 list_del(p);
1150 kfree(uuid);
1151 }
1152
1153 return 0;
1154}
1155
55ed8ca1
JH		 1156int hci_link_keys_clear(struct hci_dev *hdev)
1157{
1158 struct list_head *p, *n;
1159
1160 list_for_each_safe(p, n, &hdev->link_keys) {
1161 struct link_key *key;
1162
1163 key = list_entry(p, struct link_key, list);
1164
1165 list_del(p);
1166 kfree(key);
1167 }
1168
1169 return 0;
1170}
1171
b899efaf
VCG		 1172int hci_smp_ltks_clear(struct hci_dev *hdev)
1173{
1174 struct smp_ltk *k, *tmp;
1175
1176 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1177 list_del(&k->list);
1178 kfree(k);
1179 }
1180
1181 return 0;
1182}
1183
55ed8ca1
JH		 1184struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1185{
8035ded4 1186 struct link_key *k;
55ed8ca1 1187
8035ded4 1188 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1189 if (bacmp(bdaddr, &k->bdaddr) == 0)
1190 return k;
55ed8ca1
JH		 1191
1192 return NULL;
1193}
1194
745c0ce3 1195static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
d25e28ab
JH		 1196 u8 key_type, u8 old_key_type)
1197{
1198 /* Legacy key */
1199 if (key_type < 0x03)
745c0ce3 1200 return true;
d25e28ab
JH		 1201
1202 /* Debug keys are insecure so don't store them persistently */
1203 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1204 return false;
d25e28ab
JH		 1205
1206 /* Changed combination key and there's no previous one */
1207 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1208 return false;
d25e28ab
JH		 1209
1210 /* Security mode 3 case */
1211 if (!conn)
745c0ce3 1212 return true;
d25e28ab
JH		 1213
1214 /* Neither local nor remote side had no-bonding as requirement */
1215 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1216 return true;
d25e28ab
JH		 1217
1218 /* Local side had dedicated bonding as requirement */
1219 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1220 return true;
d25e28ab
JH		 1221
1222 /* Remote side had dedicated bonding as requirement */
1223 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1224 return true;
d25e28ab
JH		 1225
1226 /* If none of the above criteria match, then don't store the key
1227 * persistently */
745c0ce3 1228 return false;
d25e28ab
JH		 1229}
1230
c9839a11 1231struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1232{
c9839a11 1233 struct smp_ltk *k;
75d262c2 1234
c9839a11
VCG		 1235 list_for_each_entry(k, &hdev->long_term_keys, list) {
1236 if (k->ediv != ediv ||
1237 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1238 continue;
1239
c9839a11 1240 return k;
75d262c2
VCG		 1241 }
1242
1243 return NULL;
1244}
1245EXPORT_SYMBOL(hci_find_ltk);
1246
c9839a11 1247struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1248 u8 addr_type)
75d262c2 1249{
c9839a11 1250 struct smp_ltk *k;
75d262c2 1251
c9839a11
VCG		 1252 list_for_each_entry(k, &hdev->long_term_keys, list)
1253 if (addr_type == k->bdaddr_type &&
1254 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1255 return k;
1256
1257 return NULL;
1258}
c9839a11 1259EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1260
d25e28ab 1261int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1262 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1263{
1264 struct link_key *key, *old_key;
745c0ce3
VA		 1265 u8 old_key_type;
1266 bool persistent;
55ed8ca1
JH		 1267
1268 old_key = hci_find_link_key(hdev, bdaddr);
1269 if (old_key) {
1270 old_key_type = old_key->type;
1271 key = old_key;
1272 } else {
12adcf3a 1273 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1274 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1275 if (!key)
1276 return -ENOMEM;
1277 list_add(&key->list, &hdev->link_keys);
1278 }
1279
1280 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1281
d25e28ab
JH		 1282 /* Some buggy controller combinations generate a changed
1283 * combination key for legacy pairing even when there's no
1284 * previous key */
1285 if (type == HCI_LK_CHANGED_COMBINATION &&
1286 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1287 old_key_type == 0xff) {
d25e28ab 1288 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1289 if (conn)
1290 conn->key_type = type;
1291 }
d25e28ab 1292
55ed8ca1
JH		 1293 bacpy(&key->bdaddr, bdaddr);
1294 memcpy(key->val, val, 16);
55ed8ca1
JH		 1295 key->pin_len = pin_len;
1296
b6020ba0 1297 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1298 key->type = old_key_type;
4748fed2
JH		 1299 else
1300 key->type = type;
1301
4df378a1
JH		 1302 if (!new_key)
1303 return 0;
1304
1305 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1306
744cf19e 1307 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1308
6ec5bcad
VA		 1309 if (conn)
1310 conn->flush_key = !persistent;
55ed8ca1
JH		 1311
1312 return 0;
1313}
1314
c9839a11 1315int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1316 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1317 ediv, u8 rand[8])
75d262c2 1318{
c9839a11 1319 struct smp_ltk *key, *old_key;
75d262c2 1320
c9839a11
VCG		 1321 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1322 return 0;
75d262c2 1323
c9839a11
VCG		 1324 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1325 if (old_key)
75d262c2 1326 key = old_key;
c9839a11
VCG		 1327 else {
1328 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1329 if (!key)
1330 return -ENOMEM;
c9839a11 1331 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1332 }
1333
75d262c2 1334 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1335 key->bdaddr_type = addr_type;
1336 memcpy(key->val, tk, sizeof(key->val));
1337 key->authenticated = authenticated;
1338 key->ediv = ediv;
1339 key->enc_size = enc_size;
1340 key->type = type;
1341 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1342
c9839a11
VCG		 1343 if (!new_key)
1344 return 0;
75d262c2 1345
261cc5aa
VCG		 1346 if (type & HCI_SMP_LTK)
1347 mgmt_new_ltk(hdev, key, 1);
1348
75d262c2
VCG		 1349 return 0;
1350}
1351
55ed8ca1
JH		 1352int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1353{
1354 struct link_key *key;
1355
1356 key = hci_find_link_key(hdev, bdaddr);
1357 if (!key)
1358 return -ENOENT;
1359
1360 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1361
1362 list_del(&key->list);
1363 kfree(key);
1364
1365 return 0;
1366}
1367
b899efaf
VCG		 1368int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1369{
1370 struct smp_ltk *k, *tmp;
1371
1372 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1373 if (bacmp(bdaddr, &k->bdaddr))
1374 continue;
1375
1376 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1377
1378 list_del(&k->list);
1379 kfree(k);
1380 }
1381
1382 return 0;
1383}
1384
6bd32326
VT		 1385/* HCI command timer function */
1386static void hci_cmd_timer(unsigned long arg)
1387{
1388 struct hci_dev *hdev = (void *) arg;
1389
1390 BT_ERR("%s command tx timeout", hdev->name);
1391 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1392 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1393}
1394
2763eda6 1395struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1396 bdaddr_t *bdaddr)
2763eda6
SJ		 1397{
1398 struct oob_data *data;
1399
1400 list_for_each_entry(data, &hdev->remote_oob_data, list)
1401 if (bacmp(bdaddr, &data->bdaddr) == 0)
1402 return data;
1403
1404 return NULL;
1405}
1406
1407int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1408{
1409 struct oob_data *data;
1410
1411 data = hci_find_remote_oob_data(hdev, bdaddr);
1412 if (!data)
1413 return -ENOENT;
1414
1415 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1416
1417 list_del(&data->list);
1418 kfree(data);
1419
1420 return 0;
1421}
1422
1423int hci_remote_oob_data_clear(struct hci_dev *hdev)
1424{
1425 struct oob_data *data, *n;
1426
1427 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1428 list_del(&data->list);
1429 kfree(data);
1430 }
1431
1432 return 0;
1433}
1434
1435int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1436 u8 *randomizer)
2763eda6
SJ		 1437{
1438 struct oob_data *data;
1439
1440 data = hci_find_remote_oob_data(hdev, bdaddr);
1441
1442 if (!data) {
1443 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1444 if (!data)
1445 return -ENOMEM;
1446
1447 bacpy(&data->bdaddr, bdaddr);
1448 list_add(&data->list, &hdev->remote_oob_data);
1449 }
1450
1451 memcpy(data->hash, hash, sizeof(data->hash));
1452 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1453
1454 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1455
1456 return 0;
1457}
1458
04124681 1459struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1460{
8035ded4 1461 struct bdaddr_list *b;
b2a66aad 1462
8035ded4 1463 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1464 if (bacmp(bdaddr, &b->bdaddr) == 0)
1465 return b;
b2a66aad
AJ		 1466
1467 return NULL;
1468}
1469
1470int hci_blacklist_clear(struct hci_dev *hdev)
1471{
1472 struct list_head *p, *n;
1473
1474 list_for_each_safe(p, n, &hdev->blacklist) {
1475 struct bdaddr_list *b;
1476
1477 b = list_entry(p, struct bdaddr_list, list);
1478
1479 list_del(p);
1480 kfree(b);
1481 }
1482
1483 return 0;
1484}
1485
88c1fe4b 1486int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1487{
1488 struct bdaddr_list *entry;
b2a66aad
AJ		 1489
1490 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1491 return -EBADF;
1492
5e762444
AJ		 1493 if (hci_blacklist_lookup(hdev, bdaddr))
1494 return -EEXIST;
b2a66aad
AJ		 1495
1496 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1497 if (!entry)
1498 return -ENOMEM;
b2a66aad
AJ		 1499
1500 bacpy(&entry->bdaddr, bdaddr);
1501
1502 list_add(&entry->list, &hdev->blacklist);
1503
88c1fe4b 1504 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1505}
1506
88c1fe4b 1507int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1508{
1509 struct bdaddr_list *entry;
b2a66aad 1510
1ec918ce 1511 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1512 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1513
1514 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1515 if (!entry)
5e762444 1516 return -ENOENT;
b2a66aad
AJ		 1517
1518 list_del(&entry->list);
1519 kfree(entry);
1520
88c1fe4b 1521 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1522}
1523
7ba8b4be
AG		 1524static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1525{
1526 struct le_scan_params *param = (struct le_scan_params *) opt;
1527 struct hci_cp_le_set_scan_param cp;
1528
1529 memset(&cp, 0, sizeof(cp));
1530 cp.type = param->type;
1531 cp.interval = cpu_to_le16(param->interval);
1532 cp.window = cpu_to_le16(param->window);
1533
1534 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1535}
1536
1537static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1538{
1539 struct hci_cp_le_set_scan_enable cp;
1540
1541 memset(&cp, 0, sizeof(cp));
1542 cp.enable = 1;
1543
1544 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1545}
1546
1547static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1548 u16 window, int timeout)
7ba8b4be
AG		 1549{
1550 long timeo = msecs_to_jiffies(3000);
1551 struct le_scan_params param;
1552 int err;
1553
1554 BT_DBG("%s", hdev->name);
1555
1556 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1557 return -EINPROGRESS;
1558
1559 param.type = type;
1560 param.interval = interval;
1561 param.window = window;
1562
1563 hci_req_lock(hdev);
1564
1565 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1566 timeo);
7ba8b4be
AG		 1567 if (!err)
1568 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1569
1570 hci_req_unlock(hdev);
1571
1572 if (err < 0)
1573 return err;
1574
1575 schedule_delayed_work(&hdev->le_scan_disable,
04124681 1576 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1577
1578 return 0;
1579}
1580
7dbfac1d
AG		 1581int hci_cancel_le_scan(struct hci_dev *hdev)
1582{
1583 BT_DBG("%s", hdev->name);
1584
1585 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1586 return -EALREADY;
1587
1588 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1589 struct hci_cp_le_set_scan_enable cp;
1590
1591 /* Send HCI command to disable LE Scan */
1592 memset(&cp, 0, sizeof(cp));
1593 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1594 }
1595
1596 return 0;
1597}
1598
7ba8b4be
AG		 1599static void le_scan_disable_work(struct work_struct *work)
1600{
1601 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1602 le_scan_disable.work);
7ba8b4be
AG		 1603 struct hci_cp_le_set_scan_enable cp;
1604
1605 BT_DBG("%s", hdev->name);
1606
1607 memset(&cp, 0, sizeof(cp));
1608
1609 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1610}
1611
28b75a89
AG		 1612static void le_scan_work(struct work_struct *work)
1613{
1614 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1615 struct le_scan_params *param = &hdev->le_scan_params;
1616
1617 BT_DBG("%s", hdev->name);
1618
04124681
GP		 1619 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1620 param->timeout);
28b75a89
AG		 1621}
1622
1623int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1624 int timeout)
28b75a89
AG		 1625{
1626 struct le_scan_params *param = &hdev->le_scan_params;
1627
1628 BT_DBG("%s", hdev->name);
1629
1630 if (work_busy(&hdev->le_scan))
1631 return -EINPROGRESS;
1632
1633 param->type = type;
1634 param->interval = interval;
1635 param->window = window;
1636 param->timeout = timeout;
1637
1638 queue_work(system_long_wq, &hdev->le_scan);
1639
1640 return 0;
1641}
1642
9be0dab7
DH		 1643/* Alloc HCI device */
1644struct hci_dev *hci_alloc_dev(void)
1645{
1646 struct hci_dev *hdev;
1647
1648 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1649 if (!hdev)
1650 return NULL;
1651
b1b813d4
DH		 1652 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1653 hdev->esco_type = (ESCO_HV1);
1654 hdev->link_mode = (HCI_LM_ACCEPT);
1655 hdev->io_capability = 0x03; /* No Input No Output */
1656
b1b813d4
DH		 1657 hdev->sniff_max_interval = 800;
1658 hdev->sniff_min_interval = 80;
1659
1660 mutex_init(&hdev->lock);
1661 mutex_init(&hdev->req_lock);
1662
1663 INIT_LIST_HEAD(&hdev->mgmt_pending);
1664 INIT_LIST_HEAD(&hdev->blacklist);
1665 INIT_LIST_HEAD(&hdev->uuids);
1666 INIT_LIST_HEAD(&hdev->link_keys);
1667 INIT_LIST_HEAD(&hdev->long_term_keys);
1668 INIT_LIST_HEAD(&hdev->remote_oob_data);
b1b813d4
DH		 1669
1670 INIT_WORK(&hdev->rx_work, hci_rx_work);
1671 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1672 INIT_WORK(&hdev->tx_work, hci_tx_work);
1673 INIT_WORK(&hdev->power_on, hci_power_on);
1674 INIT_WORK(&hdev->le_scan, le_scan_work);
1675
b1b813d4
DH		 1676 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1677 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1678 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1679
9be0dab7 1680 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 1681 skb_queue_head_init(&hdev->rx_q);
1682 skb_queue_head_init(&hdev->cmd_q);
1683 skb_queue_head_init(&hdev->raw_q);
1684
1685 init_waitqueue_head(&hdev->req_wait_q);
1686
1687 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1688
b1b813d4
DH		 1689 hci_init_sysfs(hdev);
1690 discovery_init(hdev);
1691 hci_conn_hash_init(hdev);
9be0dab7
DH		 1692
1693 return hdev;
1694}
1695EXPORT_SYMBOL(hci_alloc_dev);
1696
1697/* Free HCI device */
1698void hci_free_dev(struct hci_dev *hdev)
1699{
1700 skb_queue_purge(&hdev->driver_init);
1701
1702 /* will free via device release */
1703 put_device(&hdev->dev);
1704}
1705EXPORT_SYMBOL(hci_free_dev);
1706
1da177e4
LT		 1707/* Register HCI device */
1708int hci_register_dev(struct hci_dev *hdev)
1709{
fc50744c 1710 struct list_head *head, *p;
b1b813d4 1711 int id, error;
1da177e4 1712
010666a1 1713 if (!hdev->open || !hdev->close)
1da177e4
LT		 1714 return -EINVAL;
1715
fc50744c
UF		 1716 write_lock(&hci_dev_list_lock);
1717
08add513
MM		 1718 /* Do not allow HCI_AMP devices to register at index 0,
1719 * so the index can be used as the AMP controller ID.
1720 */
1721 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
fc50744c 1722 head = &hci_dev_list;
1da177e4
LT		 1723
1724 /* Find first available device id */
1725 list_for_each(p, &hci_dev_list) {
fc50744c
UF		 1726 int nid = list_entry(p, struct hci_dev, list)->id;
1727 if (nid > id)
1da177e4 1728 break;
fc50744c
UF		 1729 if (nid == id)
1730 id++;
1731 head = p;
1da177e4 1732 }
8e87d142 1733
1da177e4
LT		 1734 sprintf(hdev->name, "hci%d", id);
1735 hdev->id = id;
2d8b3a11
AE		 1736
1737 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1738
fc50744c 1739 list_add(&hdev->list, head);
1da177e4 1740
f20d09d5 1741 write_unlock(&hci_dev_list_lock);
1da177e4 1742
32845eb1
GP		 1743 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1744 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1745 if (!hdev->workqueue) {
1746 error = -ENOMEM;
1747 goto err;
1748 }
f48fd9c8 1749
33ca954d
DH		 1750 error = hci_add_sysfs(hdev);
1751 if (error < 0)
1752 goto err_wqueue;
1da177e4 1753
611b30f7
MH		 1754 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1755 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1756 if (hdev->rfkill) {
1757 if (rfkill_register(hdev->rfkill) < 0) {
1758 rfkill_destroy(hdev->rfkill);
1759 hdev->rfkill = NULL;
1760 }
1761 }
1762
a8b2d5c2
JH		 1763 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1764 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1765 schedule_work(&hdev->power_on);
ab81cbf9 1766
1da177e4 1767 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1768 hci_dev_hold(hdev);
1da177e4
LT		 1769
1770 return id;
f48fd9c8 1771
33ca954d
DH		 1772err_wqueue:
1773 destroy_workqueue(hdev->workqueue);
1774err:
f20d09d5 1775 write_lock(&hci_dev_list_lock);
f48fd9c8 1776 list_del(&hdev->list);
f20d09d5 1777 write_unlock(&hci_dev_list_lock);
f48fd9c8 1778
33ca954d 1779 return error;
1da177e4
LT		 1780}
1781EXPORT_SYMBOL(hci_register_dev);
1782
1783/* Unregister HCI device */
59735631 1784void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1785{
ef222013
MH		 1786 int i;
1787
c13854ce 1788 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1789
94324962
JH		 1790 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1791
f20d09d5 1792 write_lock(&hci_dev_list_lock);
1da177e4 1793 list_del(&hdev->list);
f20d09d5 1794 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1795
1796 hci_dev_do_close(hdev);
1797
cd4c5391 1798 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1799 kfree_skb(hdev->reassembly[i]);
1800
ab81cbf9 1801 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1802 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1803 hci_dev_lock(hdev);
744cf19e 1804 mgmt_index_removed(hdev);
09fd0de5 1805 hci_dev_unlock(hdev);
56e5cb86 1806 }
ab81cbf9 1807
2e58ef3e
JH		 1808 /* mgmt_index_removed should take care of emptying the
1809 * pending list */
1810 BUG_ON(!list_empty(&hdev->mgmt_pending));
1811
1da177e4
LT		 1812 hci_notify(hdev, HCI_DEV_UNREG);
1813
611b30f7
MH		 1814 if (hdev->rfkill) {
1815 rfkill_unregister(hdev->rfkill);
1816 rfkill_destroy(hdev->rfkill);
1817 }
1818
ce242970 1819 hci_del_sysfs(hdev);
147e2d59 1820
f48fd9c8
MH		 1821 destroy_workqueue(hdev->workqueue);
1822
09fd0de5 1823 hci_dev_lock(hdev);
e2e0cacb 1824 hci_blacklist_clear(hdev);
2aeb9a1a 1825 hci_uuids_clear(hdev);
55ed8ca1 1826 hci_link_keys_clear(hdev);
b899efaf 1827 hci_smp_ltks_clear(hdev);
2763eda6 1828 hci_remote_oob_data_clear(hdev);
09fd0de5 1829 hci_dev_unlock(hdev);
e2e0cacb 1830
dc946bd8 1831 hci_dev_put(hdev);
1da177e4
LT		 1832}
1833EXPORT_SYMBOL(hci_unregister_dev);
1834
1835/* Suspend HCI device */
1836int hci_suspend_dev(struct hci_dev *hdev)
1837{
1838 hci_notify(hdev, HCI_DEV_SUSPEND);
1839 return 0;
1840}
1841EXPORT_SYMBOL(hci_suspend_dev);
1842
1843/* Resume HCI device */
1844int hci_resume_dev(struct hci_dev *hdev)
1845{
1846 hci_notify(hdev, HCI_DEV_RESUME);
1847 return 0;
1848}
1849EXPORT_SYMBOL(hci_resume_dev);
1850
76bca880
MH		 1851/* Receive frame from HCI drivers */
1852int hci_recv_frame(struct sk_buff *skb)
1853{
1854 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1855 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1856 && !test_bit(HCI_INIT, &hdev->flags))) {
1857 kfree_skb(skb);
1858 return -ENXIO;
1859 }
1860
1861 /* Incomming skb */
1862 bt_cb(skb)->incoming = 1;
1863
1864 /* Time stamp */
1865 __net_timestamp(skb);
1866
76bca880 1867 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1868 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1869
76bca880
MH		 1870 return 0;
1871}
1872EXPORT_SYMBOL(hci_recv_frame);
1873
33e882a5 1874static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1875 int count, __u8 index)
33e882a5
SS		 1876{
1877 int len = 0;
1878 int hlen = 0;
1879 int remain = count;
1880 struct sk_buff *skb;
1881 struct bt_skb_cb *scb;
1882
1883 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1884 index >= NUM_REASSEMBLY)
1885 return -EILSEQ;
1886
1887 skb = hdev->reassembly[index];
1888
1889 if (!skb) {
1890 switch (type) {
1891 case HCI_ACLDATA_PKT:
1892 len = HCI_MAX_FRAME_SIZE;
1893 hlen = HCI_ACL_HDR_SIZE;
1894 break;
1895 case HCI_EVENT_PKT:
1896 len = HCI_MAX_EVENT_SIZE;
1897 hlen = HCI_EVENT_HDR_SIZE;
1898 break;
1899 case HCI_SCODATA_PKT:
1900 len = HCI_MAX_SCO_SIZE;
1901 hlen = HCI_SCO_HDR_SIZE;
1902 break;
1903 }
1904
1e429f38 1905 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1906 if (!skb)
1907 return -ENOMEM;
1908
1909 scb = (void *) skb->cb;
1910 scb->expect = hlen;
1911 scb->pkt_type = type;
1912
1913 skb->dev = (void *) hdev;
1914 hdev->reassembly[index] = skb;
1915 }
1916
1917 while (count) {
1918 scb = (void *) skb->cb;
89bb46d0 1919 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1920
1921 memcpy(skb_put(skb, len), data, len);
1922
1923 count -= len;
1924 data += len;
1925 scb->expect -= len;
1926 remain = count;
1927
1928 switch (type) {
1929 case HCI_EVENT_PKT:
1930 if (skb->len == HCI_EVENT_HDR_SIZE) {
1931 struct hci_event_hdr *h = hci_event_hdr(skb);
1932 scb->expect = h->plen;
1933
1934 if (skb_tailroom(skb) < scb->expect) {
1935 kfree_skb(skb);
1936 hdev->reassembly[index] = NULL;
1937 return -ENOMEM;
1938 }
1939 }
1940 break;
1941
1942 case HCI_ACLDATA_PKT:
1943 if (skb->len == HCI_ACL_HDR_SIZE) {
1944 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1945 scb->expect = __le16_to_cpu(h->dlen);
1946
1947 if (skb_tailroom(skb) < scb->expect) {
1948 kfree_skb(skb);
1949 hdev->reassembly[index] = NULL;
1950 return -ENOMEM;
1951 }
1952 }
1953 break;
1954
1955 case HCI_SCODATA_PKT:
1956 if (skb->len == HCI_SCO_HDR_SIZE) {
1957 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1958 scb->expect = h->dlen;
1959
1960 if (skb_tailroom(skb) < scb->expect) {
1961 kfree_skb(skb);
1962 hdev->reassembly[index] = NULL;
1963 return -ENOMEM;
1964 }
1965 }
1966 break;
1967 }
1968
1969 if (scb->expect == 0) {
1970 /* Complete frame */
1971
1972 bt_cb(skb)->pkt_type = type;
1973 hci_recv_frame(skb);
1974
1975 hdev->reassembly[index] = NULL;
1976 return remain;
1977 }
1978 }
1979
1980 return remain;
1981}
1982
ef222013
MH		 1983int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1984{
f39a3c06
SS		 1985 int rem = 0;
1986
ef222013
MH		 1987 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1988 return -EILSEQ;
1989
da5f6c37 1990 while (count) {
1e429f38 1991 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1992 if (rem < 0)
1993 return rem;
ef222013 1994
f39a3c06
SS		 1995 data += (count - rem);
1996 count = rem;
f81c6224 1997 }
ef222013 1998
f39a3c06 1999 return rem;
ef222013
MH		 2000}
2001EXPORT_SYMBOL(hci_recv_fragment);
2002
99811510
SS		 2003#define STREAM_REASSEMBLY 0
2004
2005int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2006{
2007 int type;
2008 int rem = 0;
2009
da5f6c37 2010 while (count) {
99811510
SS		 2011 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2012
2013 if (!skb) {
2014 struct { char type; } *pkt;
2015
2016 /* Start of the frame */
2017 pkt = data;
2018 type = pkt->type;
2019
2020 data++;
2021 count--;
2022 } else
2023 type = bt_cb(skb)->pkt_type;
2024
1e429f38
GP		 2025 rem = hci_reassembly(hdev, type, data, count,
2026 STREAM_REASSEMBLY);
99811510
SS		 2027 if (rem < 0)
2028 return rem;
2029
2030 data += (count - rem);
2031 count = rem;
f81c6224 2032 }
99811510
SS		 2033
2034 return rem;
2035}
2036EXPORT_SYMBOL(hci_recv_stream_fragment);
2037
1da177e4
LT		 2038/* ---- Interface to upper protocols ---- */
2039
1da177e4
LT		 2040int hci_register_cb(struct hci_cb *cb)
2041{
2042 BT_DBG("%p name %s", cb, cb->name);
2043
f20d09d5 2044 write_lock(&hci_cb_list_lock);
1da177e4 2045 list_add(&cb->list, &hci_cb_list);
f20d09d5 2046 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2047
2048 return 0;
2049}
2050EXPORT_SYMBOL(hci_register_cb);
2051
2052int hci_unregister_cb(struct hci_cb *cb)
2053{
2054 BT_DBG("%p name %s", cb, cb->name);
2055
f20d09d5 2056 write_lock(&hci_cb_list_lock);
1da177e4 2057 list_del(&cb->list);
f20d09d5 2058 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2059
2060 return 0;
2061}
2062EXPORT_SYMBOL(hci_unregister_cb);
2063
2064static int hci_send_frame(struct sk_buff *skb)
2065{
2066 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2067
2068 if (!hdev) {
2069 kfree_skb(skb);
2070 return -ENODEV;
2071 }
2072
0d48d939 2073 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2074
cd82e61c
MH		 2075 /* Time stamp */
2076 __net_timestamp(skb);
1da177e4 2077
cd82e61c
MH		 2078 /* Send copy to monitor */
2079 hci_send_to_monitor(hdev, skb);
2080
2081 if (atomic_read(&hdev->promisc)) {
2082 /* Send copy to the sockets */
470fe1b5 2083 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2084 }
2085
2086 /* Get rid of skb owner, prior to sending to the driver. */
2087 skb_orphan(skb);
2088
2089 return hdev->send(skb);
2090}
2091
2092/* Send HCI command */
a9de9248 2093int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2094{
2095 int len = HCI_COMMAND_HDR_SIZE + plen;
2096 struct hci_command_hdr *hdr;
2097 struct sk_buff *skb;
2098
a9de9248 2099 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2100
2101 skb = bt_skb_alloc(len, GFP_ATOMIC);
2102 if (!skb) {
ef222013 2103 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2104 return -ENOMEM;
2105 }
2106
2107 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2108 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2109 hdr->plen = plen;
2110
2111 if (plen)
2112 memcpy(skb_put(skb, plen), param, plen);
2113
2114 BT_DBG("skb len %d", skb->len);
2115
0d48d939 2116 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2117 skb->dev = (void *) hdev;
c78ae283 2118
a5040efa
JH		 2119 if (test_bit(HCI_INIT, &hdev->flags))
2120 hdev->init_last_cmd = opcode;
2121
1da177e4 2122 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2123 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2124
2125 return 0;
2126}
1da177e4
LT		 2127
2128/* Get data from the previously sent command */
a9de9248 2129void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2130{
2131 struct hci_command_hdr *hdr;
2132
2133 if (!hdev->sent_cmd)
2134 return NULL;
2135
2136 hdr = (void *) hdev->sent_cmd->data;
2137
a9de9248 2138 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2139 return NULL;
2140
a9de9248 2141 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2142
2143 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2144}
2145
2146/* Send ACL data */
2147static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2148{
2149 struct hci_acl_hdr *hdr;
2150 int len = skb->len;
2151
badff6d0
ACM		 2152 skb_push(skb, HCI_ACL_HDR_SIZE);
2153 skb_reset_transport_header(skb);
9c70220b 2154 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2155 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2156 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2157}
2158
73d80deb
LAD		 2159static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2160 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2161{
2162 struct hci_dev *hdev = conn->hdev;
2163 struct sk_buff *list;
2164
087bfd99
GP		 2165 skb->len = skb_headlen(skb);
2166 skb->data_len = 0;
2167
2168 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2169 hci_add_acl_hdr(skb, conn->handle, flags);
2170
70f23020
AE		 2171 list = skb_shinfo(skb)->frag_list;
2172 if (!list) {
1da177e4
LT		 2173 /* Non fragmented */
2174 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2175
73d80deb 2176 skb_queue_tail(queue, skb);
1da177e4
LT		 2177 } else {
2178 /* Fragmented */
2179 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2180
2181 skb_shinfo(skb)->frag_list = NULL;
2182
2183 /* Queue all fragments atomically */
af3e6359 2184 spin_lock(&queue->lock);
1da177e4 2185
73d80deb 2186 __skb_queue_tail(queue, skb);
e702112f
AE		 2187
2188 flags &= ~ACL_START;
2189 flags |= ACL_CONT;
1da177e4
LT		 2190 do {
2191 skb = list; list = list->next;
8e87d142 2192
1da177e4 2193 skb->dev = (void *) hdev;
0d48d939 2194 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2195 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2196
2197 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2198
73d80deb 2199 __skb_queue_tail(queue, skb);
1da177e4
LT		 2200 } while (list);
2201
af3e6359 2202 spin_unlock(&queue->lock);
1da177e4 2203 }
73d80deb
LAD		 2204}
2205
2206void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2207{
2208 struct hci_conn *conn = chan->conn;
2209 struct hci_dev *hdev = conn->hdev;
2210
2211 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2212
2213 skb->dev = (void *) hdev;
73d80deb
LAD		 2214
2215 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2216
3eff45ea 2217 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2218}
2219EXPORT_SYMBOL(hci_send_acl);
2220
2221/* Send SCO data */
0d861d8b 2222void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2223{
2224 struct hci_dev *hdev = conn->hdev;
2225 struct hci_sco_hdr hdr;
2226
2227 BT_DBG("%s len %d", hdev->name, skb->len);
2228
aca3192c 2229 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2230 hdr.dlen = skb->len;
2231
badff6d0
ACM		 2232 skb_push(skb, HCI_SCO_HDR_SIZE);
2233 skb_reset_transport_header(skb);
9c70220b 2234 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2235
2236 skb->dev = (void *) hdev;
0d48d939 2237 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2238
1da177e4 2239 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2240 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2241}
2242EXPORT_SYMBOL(hci_send_sco);
2243
2244/* ---- HCI TX task (outgoing data) ---- */
2245
2246/* HCI Connection scheduler */
2247static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2248{
2249 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2250 struct hci_conn *conn = NULL, *c;
abc5de8f 2251 unsigned int num = 0, min = ~0;
1da177e4 2252
8e87d142 2253 /* We don't have to lock device here. Connections are always
1da177e4 2254 * added and removed with TX task disabled. */
bf4c6325
GP		 2255
2256 rcu_read_lock();
2257
2258 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2259 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2260 continue;
769be974
MH		 2261
2262 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2263 continue;
2264
1da177e4
LT		 2265 num++;
2266
2267 if (c->sent < min) {
2268 min = c->sent;
2269 conn = c;
2270 }
52087a79
LAD		 2271
2272 if (hci_conn_num(hdev, type) == num)
2273 break;
1da177e4
LT		 2274 }
2275
bf4c6325
GP		 2276 rcu_read_unlock();
2277
1da177e4 2278 if (conn) {
6ed58ec5
VT		 2279 int cnt, q;
2280
2281 switch (conn->type) {
2282 case ACL_LINK:
2283 cnt = hdev->acl_cnt;
2284 break;
2285 case SCO_LINK:
2286 case ESCO_LINK:
2287 cnt = hdev->sco_cnt;
2288 break;
2289 case LE_LINK:
2290 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2291 break;
2292 default:
2293 cnt = 0;
2294 BT_ERR("Unknown link type");
2295 }
2296
2297 q = cnt / num;
1da177e4
LT		 2298 *quote = q ? q : 1;
2299 } else
2300 *quote = 0;
2301
2302 BT_DBG("conn %p quote %d", conn, *quote);
2303 return conn;
2304}
2305
bae1f5d9 2306static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2307{
2308 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2309 struct hci_conn *c;
1da177e4 2310
bae1f5d9 2311 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2312
bf4c6325
GP		 2313 rcu_read_lock();
2314
1da177e4 2315 /* Kill stalled connections */
bf4c6325 2316 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2317 if (c->type == type && c->sent) {
2318 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2319 hdev->name, batostr(&c->dst));
2320 hci_acl_disconn(c, 0x13);
2321 }
2322 }
bf4c6325
GP		 2323
2324 rcu_read_unlock();
1da177e4
LT		 2325}
2326
73d80deb
LAD		 2327static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2328 int *quote)
1da177e4 2329{
73d80deb
LAD		 2330 struct hci_conn_hash *h = &hdev->conn_hash;
2331 struct hci_chan *chan = NULL;
abc5de8f 2332 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2333 struct hci_conn *conn;
73d80deb
LAD		 2334 int cnt, q, conn_num = 0;
2335
2336 BT_DBG("%s", hdev->name);
2337
bf4c6325
GP		 2338 rcu_read_lock();
2339
2340 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2341 struct hci_chan *tmp;
2342
2343 if (conn->type != type)
2344 continue;
2345
2346 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2347 continue;
2348
2349 conn_num++;
2350
8192edef 2351 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2352 struct sk_buff *skb;
2353
2354 if (skb_queue_empty(&tmp->data_q))
2355 continue;
2356
2357 skb = skb_peek(&tmp->data_q);
2358 if (skb->priority < cur_prio)
2359 continue;
2360
2361 if (skb->priority > cur_prio) {
2362 num = 0;
2363 min = ~0;
2364 cur_prio = skb->priority;
2365 }
2366
2367 num++;
2368
2369 if (conn->sent < min) {
2370 min = conn->sent;
2371 chan = tmp;
2372 }
2373 }
2374
2375 if (hci_conn_num(hdev, type) == conn_num)
2376 break;
2377 }
2378
bf4c6325
GP		 2379 rcu_read_unlock();
2380
73d80deb
LAD		 2381 if (!chan)
2382 return NULL;
2383
2384 switch (chan->conn->type) {
2385 case ACL_LINK:
2386 cnt = hdev->acl_cnt;
2387 break;
2388 case SCO_LINK:
2389 case ESCO_LINK:
2390 cnt = hdev->sco_cnt;
2391 break;
2392 case LE_LINK:
2393 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2394 break;
2395 default:
2396 cnt = 0;
2397 BT_ERR("Unknown link type");
2398 }
2399
2400 q = cnt / num;
2401 *quote = q ? q : 1;
2402 BT_DBG("chan %p quote %d", chan, *quote);
2403 return chan;
2404}
2405
02b20f0b
LAD		 2406static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2407{
2408 struct hci_conn_hash *h = &hdev->conn_hash;
2409 struct hci_conn *conn;
2410 int num = 0;
2411
2412 BT_DBG("%s", hdev->name);
2413
bf4c6325
GP		 2414 rcu_read_lock();
2415
2416 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2417 struct hci_chan *chan;
2418
2419 if (conn->type != type)
2420 continue;
2421
2422 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2423 continue;
2424
2425 num++;
2426
8192edef 2427 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2428 struct sk_buff *skb;
2429
2430 if (chan->sent) {
2431 chan->sent = 0;
2432 continue;
2433 }
2434
2435 if (skb_queue_empty(&chan->data_q))
2436 continue;
2437
2438 skb = skb_peek(&chan->data_q);
2439 if (skb->priority >= HCI_PRIO_MAX - 1)
2440 continue;
2441
2442 skb->priority = HCI_PRIO_MAX - 1;
2443
2444 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2445 skb->priority);
2446 }
2447
2448 if (hci_conn_num(hdev, type) == num)
2449 break;
2450 }
bf4c6325
GP		 2451
2452 rcu_read_unlock();
2453
02b20f0b
LAD		 2454}
2455
b71d385a
AE		 2456static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2457{
2458 /* Calculate count of blocks used by this packet */
2459 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2460}
2461
63d2bc1b 2462static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2463{
1da177e4
LT		 2464 if (!test_bit(HCI_RAW, &hdev->flags)) {
2465 /* ACL tx timeout must be longer than maximum
2466 * link supervision timeout (40.9 seconds) */
63d2bc1b 2467 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
cc48dc0a 2468 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2469 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2470 }
63d2bc1b 2471}
1da177e4 2472
63d2bc1b
AE		 2473static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2474{
2475 unsigned int cnt = hdev->acl_cnt;
2476 struct hci_chan *chan;
2477 struct sk_buff *skb;
2478 int quote;
2479
2480 __check_timeout(hdev, cnt);
04837f64 2481
73d80deb
LAD		 2482 while (hdev->acl_cnt &&
2483 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2484 u32 priority = (skb_peek(&chan->data_q))->priority;
2485 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2486 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2487 skb->len, skb->priority);
2488
ec1cce24
LAD		 2489 /* Stop if priority has changed */
2490 if (skb->priority < priority)
2491 break;
2492
2493 skb = skb_dequeue(&chan->data_q);
2494
73d80deb 2495 hci_conn_enter_active_mode(chan->conn,
04124681 2496 bt_cb(skb)->force_active);
04837f64 2497
1da177e4
LT		 2498 hci_send_frame(skb);
2499 hdev->acl_last_tx = jiffies;
2500
2501 hdev->acl_cnt--;
73d80deb
LAD		 2502 chan->sent++;
2503 chan->conn->sent++;
1da177e4
LT		 2504 }
2505 }
02b20f0b
LAD		 2506
2507 if (cnt != hdev->acl_cnt)
2508 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2509}
2510
b71d385a
AE		 2511static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2512{
63d2bc1b 2513 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2514 struct hci_chan *chan;
2515 struct sk_buff *skb;
2516 int quote;
b71d385a 2517
63d2bc1b 2518 __check_timeout(hdev, cnt);
b71d385a
AE		 2519
2520 while (hdev->block_cnt > 0 &&
2521 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2522 u32 priority = (skb_peek(&chan->data_q))->priority;
2523 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2524 int blocks;
2525
2526 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2527 skb->len, skb->priority);
2528
2529 /* Stop if priority has changed */
2530 if (skb->priority < priority)
2531 break;
2532
2533 skb = skb_dequeue(&chan->data_q);
2534
2535 blocks = __get_blocks(hdev, skb);
2536 if (blocks > hdev->block_cnt)
2537 return;
2538
2539 hci_conn_enter_active_mode(chan->conn,
2540 bt_cb(skb)->force_active);
2541
2542 hci_send_frame(skb);
2543 hdev->acl_last_tx = jiffies;
2544
2545 hdev->block_cnt -= blocks;
2546 quote -= blocks;
2547
2548 chan->sent += blocks;
2549 chan->conn->sent += blocks;
2550 }
2551 }
2552
2553 if (cnt != hdev->block_cnt)
2554 hci_prio_recalculate(hdev, ACL_LINK);
2555}
2556
2557static inline void hci_sched_acl(struct hci_dev *hdev)
2558{
2559 BT_DBG("%s", hdev->name);
2560
2561 if (!hci_conn_num(hdev, ACL_LINK))
2562 return;
2563
2564 switch (hdev->flow_ctl_mode) {
2565 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2566 hci_sched_acl_pkt(hdev);
2567 break;
2568
2569 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2570 hci_sched_acl_blk(hdev);
2571 break;
2572 }
2573}
2574
1da177e4
LT		 2575/* Schedule SCO */
2576static inline void hci_sched_sco(struct hci_dev *hdev)
2577{
2578 struct hci_conn *conn;
2579 struct sk_buff *skb;
2580 int quote;
2581
2582 BT_DBG("%s", hdev->name);
2583
52087a79
LAD		 2584 if (!hci_conn_num(hdev, SCO_LINK))
2585 return;
2586
1da177e4
LT		 2587 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2588 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2589 BT_DBG("skb %p len %d", skb, skb->len);
2590 hci_send_frame(skb);
2591
2592 conn->sent++;
2593 if (conn->sent == ~0)
2594 conn->sent = 0;
2595 }
2596 }
2597}
2598
b6a0dc82
MH		 2599static inline void hci_sched_esco(struct hci_dev *hdev)
2600{
2601 struct hci_conn *conn;
2602 struct sk_buff *skb;
2603 int quote;
2604
2605 BT_DBG("%s", hdev->name);
2606
52087a79
LAD		 2607 if (!hci_conn_num(hdev, ESCO_LINK))
2608 return;
2609
b6a0dc82
MH		 2610 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2611 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2612 BT_DBG("skb %p len %d", skb, skb->len);
2613 hci_send_frame(skb);
2614
2615 conn->sent++;
2616 if (conn->sent == ~0)
2617 conn->sent = 0;
2618 }
2619 }
2620}
2621
6ed58ec5
VT		 2622static inline void hci_sched_le(struct hci_dev *hdev)
2623{
73d80deb 2624 struct hci_chan *chan;
6ed58ec5 2625 struct sk_buff *skb;
02b20f0b 2626 int quote, cnt, tmp;
6ed58ec5
VT		 2627
2628 BT_DBG("%s", hdev->name);
2629
52087a79
LAD		 2630 if (!hci_conn_num(hdev, LE_LINK))
2631 return;
2632
6ed58ec5
VT		 2633 if (!test_bit(HCI_RAW, &hdev->flags)) {
2634 /* LE tx timeout must be longer than maximum
2635 * link supervision timeout (40.9 seconds) */
bae1f5d9 2636 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2637 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2638 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2639 }
2640
2641 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2642 tmp = cnt;
73d80deb 2643 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2644 u32 priority = (skb_peek(&chan->data_q))->priority;
2645 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2646 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2647 skb->len, skb->priority);
6ed58ec5 2648
ec1cce24
LAD		 2649 /* Stop if priority has changed */
2650 if (skb->priority < priority)
2651 break;
2652
2653 skb = skb_dequeue(&chan->data_q);
2654
6ed58ec5
VT		 2655 hci_send_frame(skb);
2656 hdev->le_last_tx = jiffies;
2657
2658 cnt--;
73d80deb
LAD		 2659 chan->sent++;
2660 chan->conn->sent++;
6ed58ec5
VT		 2661 }
2662 }
73d80deb 2663
6ed58ec5
VT		 2664 if (hdev->le_pkts)
2665 hdev->le_cnt = cnt;
2666 else
2667 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2668
2669 if (cnt != tmp)
2670 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2671}
2672
3eff45ea 2673static void hci_tx_work(struct work_struct *work)
1da177e4 2674{
3eff45ea 2675 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2676 struct sk_buff *skb;
2677
6ed58ec5
VT		 2678 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2679 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2680
2681 /* Schedule queues and send stuff to HCI driver */
2682
2683 hci_sched_acl(hdev);
2684
2685 hci_sched_sco(hdev);
2686
b6a0dc82
MH		 2687 hci_sched_esco(hdev);
2688
6ed58ec5
VT		 2689 hci_sched_le(hdev);
2690
1da177e4
LT		 2691 /* Send next queued raw (unknown type) packet */
2692 while ((skb = skb_dequeue(&hdev->raw_q)))
2693 hci_send_frame(skb);
1da177e4
LT		 2694}
2695
25985edc 2696/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2697
2698/* ACL data packet */
2699static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2700{
2701 struct hci_acl_hdr *hdr = (void *) skb->data;
2702 struct hci_conn *conn;
2703 __u16 handle, flags;
2704
2705 skb_pull(skb, HCI_ACL_HDR_SIZE);
2706
2707 handle = __le16_to_cpu(hdr->handle);
2708 flags = hci_flags(handle);
2709 handle = hci_handle(handle);
2710
2711 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2712
2713 hdev->stat.acl_rx++;
2714
2715 hci_dev_lock(hdev);
2716 conn = hci_conn_hash_lookup_handle(hdev, handle);
2717 hci_dev_unlock(hdev);
8e87d142 2718
1da177e4 2719 if (conn) {
65983fc7 2720 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2721
671267bf
JH		 2722 hci_dev_lock(hdev);
2723 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2724 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2725 mgmt_device_connected(hdev, &conn->dst, conn->type,
2726 conn->dst_type, 0, NULL, 0,
2727 conn->dev_class);
2728 hci_dev_unlock(hdev);
2729
1da177e4 2730 /* Send to upper protocol */
686ebf28
UF		 2731 l2cap_recv_acldata(conn, skb, flags);
2732 return;
1da177e4 2733 } else {
8e87d142 2734 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2735 hdev->name, handle);
2736 }
2737
2738 kfree_skb(skb);
2739}
2740
2741/* SCO data packet */
2742static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2743{
2744 struct hci_sco_hdr *hdr = (void *) skb->data;
2745 struct hci_conn *conn;
2746 __u16 handle;
2747
2748 skb_pull(skb, HCI_SCO_HDR_SIZE);
2749
2750 handle = __le16_to_cpu(hdr->handle);
2751
2752 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2753
2754 hdev->stat.sco_rx++;
2755
2756 hci_dev_lock(hdev);
2757 conn = hci_conn_hash_lookup_handle(hdev, handle);
2758 hci_dev_unlock(hdev);
2759
2760 if (conn) {
1da177e4 2761 /* Send to upper protocol */
686ebf28
UF		 2762 sco_recv_scodata(conn, skb);
2763 return;
1da177e4 2764 } else {
8e87d142 2765 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2766 hdev->name, handle);
2767 }
2768
2769 kfree_skb(skb);
2770}
2771
b78752cc 2772static void hci_rx_work(struct work_struct *work)
1da177e4 2773{
b78752cc 2774 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2775 struct sk_buff *skb;
2776
2777 BT_DBG("%s", hdev->name);
2778
1da177e4 2779 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2780 /* Send copy to monitor */
2781 hci_send_to_monitor(hdev, skb);
2782
1da177e4
LT		 2783 if (atomic_read(&hdev->promisc)) {
2784 /* Send copy to the sockets */
470fe1b5 2785 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2786 }
2787
2788 if (test_bit(HCI_RAW, &hdev->flags)) {
2789 kfree_skb(skb);
2790 continue;
2791 }
2792
2793 if (test_bit(HCI_INIT, &hdev->flags)) {
2794 /* Don't process data packets in this states. */
0d48d939 2795 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2796 case HCI_ACLDATA_PKT:
2797 case HCI_SCODATA_PKT:
2798 kfree_skb(skb);
2799 continue;
3ff50b79 2800 }
1da177e4
LT		 2801 }
2802
2803 /* Process frame */
0d48d939 2804 switch (bt_cb(skb)->pkt_type) {
1da177e4 2805 case HCI_EVENT_PKT:
b78752cc 2806 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2807 hci_event_packet(hdev, skb);
2808 break;
2809
2810 case HCI_ACLDATA_PKT:
2811 BT_DBG("%s ACL data packet", hdev->name);
2812 hci_acldata_packet(hdev, skb);
2813 break;
2814
2815 case HCI_SCODATA_PKT:
2816 BT_DBG("%s SCO data packet", hdev->name);
2817 hci_scodata_packet(hdev, skb);
2818 break;
2819
2820 default:
2821 kfree_skb(skb);
2822 break;
2823 }
2824 }
1da177e4
LT		 2825}
2826
c347b765 2827static void hci_cmd_work(struct work_struct *work)
1da177e4 2828{
c347b765 2829 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2830 struct sk_buff *skb;
2831
2832 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2833
1da177e4 2834 /* Send queued commands */
5a08ecce
AE		 2835 if (atomic_read(&hdev->cmd_cnt)) {
2836 skb = skb_dequeue(&hdev->cmd_q);
2837 if (!skb)
2838 return;
2839
7585b97a 2840 kfree_skb(hdev->sent_cmd);
1da177e4 2841
70f23020
AE		 2842 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2843 if (hdev->sent_cmd) {
1da177e4
LT		 2844 atomic_dec(&hdev->cmd_cnt);
2845 hci_send_frame(skb);
7bdb8a5c
SJ		 2846 if (test_bit(HCI_RESET, &hdev->flags))
2847 del_timer(&hdev->cmd_timer);
2848 else
2849 mod_timer(&hdev->cmd_timer,
6bd32326 2850 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2851 } else {
2852 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2853 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2854 }
2855 }
2856}
2519a1fc
AG		 2857
2858int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2859{
2860 /* General inquiry access code (GIAC) */
2861 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2862 struct hci_cp_inquiry cp;
2863
2864 BT_DBG("%s", hdev->name);
2865
2866 if (test_bit(HCI_INQUIRY, &hdev->flags))
2867 return -EINPROGRESS;
2868
4663262c
JH		 2869 inquiry_cache_flush(hdev);
2870
2519a1fc
AG		 2871 memset(&cp, 0, sizeof(cp));
2872 memcpy(&cp.lap, lap, sizeof(cp.lap));
2873 cp.length = length;
2874
2875 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2876}
023d5049
AG		 2877
2878int hci_cancel_inquiry(struct hci_dev *hdev)
2879{
2880 BT_DBG("%s", hdev->name);
2881
2882 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2883 return -EALREADY;
023d5049
AG		 2884
2885 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2886}
31f7956c
AG		 2887
2888u8 bdaddr_to_le(u8 bdaddr_type)
2889{
2890 switch (bdaddr_type) {
2891 case BDADDR_LE_PUBLIC:
2892 return ADDR_LE_DEV_PUBLIC;
2893
2894 default:
2895 /* Fallback to LE Random address type */
2896 return ADDR_LE_DEV_RANDOM;
2897 }
2898}
kernel source for telekom puls (alcatel/mediatek)