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Bluetooth: Restrict to one SCO listening socket
[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
1da177e4
LT		 1095/* Alloc HCI device */
1096struct hci_dev *hci_alloc_dev(void)
1097{
1098 struct hci_dev *hdev;
1099
25ea6db0 1100 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 1101 if (!hdev)
1102 return NULL;
1103
0ac7e700 1104 hci_init_sysfs(hdev);
1da177e4
LT		 1105 skb_queue_head_init(&hdev->driver_init);
1106
1107 return hdev;
1108}
1109EXPORT_SYMBOL(hci_alloc_dev);
1110
1111/* Free HCI device */
1112void hci_free_dev(struct hci_dev *hdev)
1113{
1114 skb_queue_purge(&hdev->driver_init);
1115
a91f2e39
MH		 1116 /* will free via device release */
1117 put_device(&hdev->dev);
1da177e4
LT		 1118}
1119EXPORT_SYMBOL(hci_free_dev);
1120
ab81cbf9
JH		 1121static void hci_power_on(struct work_struct *work)
1122{
1123 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1124
1125 BT_DBG("%s", hdev->name);
1126
1127 if (hci_dev_open(hdev->id) < 0)
1128 return;
1129
a8b2d5c2 1130 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1131 schedule_delayed_work(&hdev->power_off,
3243553f 1132 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1133
a8b2d5c2 1134 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1135 mgmt_index_added(hdev);
ab81cbf9
JH		 1136}
1137
1138static void hci_power_off(struct work_struct *work)
1139{
3243553f
JH		 1140 struct hci_dev *hdev = container_of(work, struct hci_dev,
1141 power_off.work);
ab81cbf9
JH		 1142
1143 BT_DBG("%s", hdev->name);
1144
8ee56540 1145 hci_dev_do_close(hdev);
ab81cbf9
JH		 1146}
1147
16ab91ab
JH		 1148static void hci_discov_off(struct work_struct *work)
1149{
1150 struct hci_dev *hdev;
1151 u8 scan = SCAN_PAGE;
1152
1153 hdev = container_of(work, struct hci_dev, discov_off.work);
1154
1155 BT_DBG("%s", hdev->name);
1156
09fd0de5 1157 hci_dev_lock(hdev);
16ab91ab
JH		 1158
1159 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1160
1161 hdev->discov_timeout = 0;
1162
09fd0de5 1163 hci_dev_unlock(hdev);
16ab91ab
JH		 1164}
1165
2aeb9a1a
JH		 1166int hci_uuids_clear(struct hci_dev *hdev)
1167{
1168 struct list_head *p, *n;
1169
1170 list_for_each_safe(p, n, &hdev->uuids) {
1171 struct bt_uuid *uuid;
1172
1173 uuid = list_entry(p, struct bt_uuid, list);
1174
1175 list_del(p);
1176 kfree(uuid);
1177 }
1178
1179 return 0;
1180}
1181
55ed8ca1
JH		 1182int hci_link_keys_clear(struct hci_dev *hdev)
1183{
1184 struct list_head *p, *n;
1185
1186 list_for_each_safe(p, n, &hdev->link_keys) {
1187 struct link_key *key;
1188
1189 key = list_entry(p, struct link_key, list);
1190
1191 list_del(p);
1192 kfree(key);
1193 }
1194
1195 return 0;
1196}
1197
b899efaf
VCG		 1198int hci_smp_ltks_clear(struct hci_dev *hdev)
1199{
1200 struct smp_ltk *k, *tmp;
1201
1202 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1203 list_del(&k->list);
1204 kfree(k);
1205 }
1206
1207 return 0;
1208}
1209
55ed8ca1
JH		 1210struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1211{
8035ded4 1212 struct link_key *k;
55ed8ca1 1213
8035ded4 1214 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1215 if (bacmp(bdaddr, &k->bdaddr) == 0)
1216 return k;
55ed8ca1
JH		 1217
1218 return NULL;
1219}
1220
745c0ce3 1221static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
d25e28ab
JH		 1222 u8 key_type, u8 old_key_type)
1223{
1224 /* Legacy key */
1225 if (key_type < 0x03)
745c0ce3 1226 return true;
d25e28ab
JH		 1227
1228 /* Debug keys are insecure so don't store them persistently */
1229 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1230 return false;
d25e28ab
JH		 1231
1232 /* Changed combination key and there's no previous one */
1233 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1234 return false;
d25e28ab
JH		 1235
1236 /* Security mode 3 case */
1237 if (!conn)
745c0ce3 1238 return true;
d25e28ab
JH		 1239
1240 /* Neither local nor remote side had no-bonding as requirement */
1241 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1242 return true;
d25e28ab
JH		 1243
1244 /* Local side had dedicated bonding as requirement */
1245 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1246 return true;
d25e28ab
JH		 1247
1248 /* Remote side had dedicated bonding as requirement */
1249 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1250 return true;
d25e28ab
JH		 1251
1252 /* If none of the above criteria match, then don't store the key
1253 * persistently */
745c0ce3 1254 return false;
d25e28ab
JH		 1255}
1256
c9839a11 1257struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1258{
c9839a11 1259 struct smp_ltk *k;
75d262c2 1260
c9839a11
VCG		 1261 list_for_each_entry(k, &hdev->long_term_keys, list) {
1262 if (k->ediv != ediv ||
1263 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1264 continue;
1265
c9839a11 1266 return k;
75d262c2
VCG		 1267 }
1268
1269 return NULL;
1270}
1271EXPORT_SYMBOL(hci_find_ltk);
1272
c9839a11 1273struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1274 u8 addr_type)
75d262c2 1275{
c9839a11 1276 struct smp_ltk *k;
75d262c2 1277
c9839a11
VCG		 1278 list_for_each_entry(k, &hdev->long_term_keys, list)
1279 if (addr_type == k->bdaddr_type &&
1280 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1281 return k;
1282
1283 return NULL;
1284}
c9839a11 1285EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1286
d25e28ab 1287int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1288 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1289{
1290 struct link_key *key, *old_key;
745c0ce3
VA		 1291 u8 old_key_type;
1292 bool persistent;
55ed8ca1
JH		 1293
1294 old_key = hci_find_link_key(hdev, bdaddr);
1295 if (old_key) {
1296 old_key_type = old_key->type;
1297 key = old_key;
1298 } else {
12adcf3a 1299 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1300 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1301 if (!key)
1302 return -ENOMEM;
1303 list_add(&key->list, &hdev->link_keys);
1304 }
1305
1306 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1307
d25e28ab
JH		 1308 /* Some buggy controller combinations generate a changed
1309 * combination key for legacy pairing even when there's no
1310 * previous key */
1311 if (type == HCI_LK_CHANGED_COMBINATION &&
1312 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1313 old_key_type == 0xff) {
d25e28ab 1314 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1315 if (conn)
1316 conn->key_type = type;
1317 }
d25e28ab 1318
55ed8ca1
JH		 1319 bacpy(&key->bdaddr, bdaddr);
1320 memcpy(key->val, val, 16);
55ed8ca1
JH		 1321 key->pin_len = pin_len;
1322
b6020ba0 1323 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1324 key->type = old_key_type;
4748fed2
JH		 1325 else
1326 key->type = type;
1327
4df378a1
JH		 1328 if (!new_key)
1329 return 0;
1330
1331 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1332
744cf19e 1333 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1334
6ec5bcad
VA		 1335 if (conn)
1336 conn->flush_key = !persistent;
55ed8ca1
JH		 1337
1338 return 0;
1339}
1340
c9839a11 1341int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1342 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1343 ediv, u8 rand[8])
75d262c2 1344{
c9839a11 1345 struct smp_ltk *key, *old_key;
75d262c2 1346
c9839a11
VCG		 1347 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1348 return 0;
75d262c2 1349
c9839a11
VCG		 1350 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1351 if (old_key)
75d262c2 1352 key = old_key;
c9839a11
VCG		 1353 else {
1354 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1355 if (!key)
1356 return -ENOMEM;
c9839a11 1357 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1358 }
1359
75d262c2 1360 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1361 key->bdaddr_type = addr_type;
1362 memcpy(key->val, tk, sizeof(key->val));
1363 key->authenticated = authenticated;
1364 key->ediv = ediv;
1365 key->enc_size = enc_size;
1366 key->type = type;
1367 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1368
c9839a11
VCG		 1369 if (!new_key)
1370 return 0;
75d262c2 1371
261cc5aa
VCG		 1372 if (type & HCI_SMP_LTK)
1373 mgmt_new_ltk(hdev, key, 1);
1374
75d262c2
VCG		 1375 return 0;
1376}
1377
55ed8ca1
JH		 1378int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1379{
1380 struct link_key *key;
1381
1382 key = hci_find_link_key(hdev, bdaddr);
1383 if (!key)
1384 return -ENOENT;
1385
1386 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1387
1388 list_del(&key->list);
1389 kfree(key);
1390
1391 return 0;
1392}
1393
b899efaf
VCG		 1394int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1395{
1396 struct smp_ltk *k, *tmp;
1397
1398 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1399 if (bacmp(bdaddr, &k->bdaddr))
1400 continue;
1401
1402 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1403
1404 list_del(&k->list);
1405 kfree(k);
1406 }
1407
1408 return 0;
1409}
1410
6bd32326
VT		 1411/* HCI command timer function */
1412static void hci_cmd_timer(unsigned long arg)
1413{
1414 struct hci_dev *hdev = (void *) arg;
1415
1416 BT_ERR("%s command tx timeout", hdev->name);
1417 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1418 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1419}
1420
2763eda6 1421struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1422 bdaddr_t *bdaddr)
2763eda6
SJ		 1423{
1424 struct oob_data *data;
1425
1426 list_for_each_entry(data, &hdev->remote_oob_data, list)
1427 if (bacmp(bdaddr, &data->bdaddr) == 0)
1428 return data;
1429
1430 return NULL;
1431}
1432
1433int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1434{
1435 struct oob_data *data;
1436
1437 data = hci_find_remote_oob_data(hdev, bdaddr);
1438 if (!data)
1439 return -ENOENT;
1440
1441 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1442
1443 list_del(&data->list);
1444 kfree(data);
1445
1446 return 0;
1447}
1448
1449int hci_remote_oob_data_clear(struct hci_dev *hdev)
1450{
1451 struct oob_data *data, *n;
1452
1453 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1454 list_del(&data->list);
1455 kfree(data);
1456 }
1457
1458 return 0;
1459}
1460
1461int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1462 u8 *randomizer)
2763eda6
SJ		 1463{
1464 struct oob_data *data;
1465
1466 data = hci_find_remote_oob_data(hdev, bdaddr);
1467
1468 if (!data) {
1469 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1470 if (!data)
1471 return -ENOMEM;
1472
1473 bacpy(&data->bdaddr, bdaddr);
1474 list_add(&data->list, &hdev->remote_oob_data);
1475 }
1476
1477 memcpy(data->hash, hash, sizeof(data->hash));
1478 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1479
1480 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1481
1482 return 0;
1483}
1484
04124681 1485struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1486{
8035ded4 1487 struct bdaddr_list *b;
b2a66aad 1488
8035ded4 1489 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1490 if (bacmp(bdaddr, &b->bdaddr) == 0)
1491 return b;
b2a66aad
AJ		 1492
1493 return NULL;
1494}
1495
1496int hci_blacklist_clear(struct hci_dev *hdev)
1497{
1498 struct list_head *p, *n;
1499
1500 list_for_each_safe(p, n, &hdev->blacklist) {
1501 struct bdaddr_list *b;
1502
1503 b = list_entry(p, struct bdaddr_list, list);
1504
1505 list_del(p);
1506 kfree(b);
1507 }
1508
1509 return 0;
1510}
1511
88c1fe4b 1512int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1513{
1514 struct bdaddr_list *entry;
b2a66aad
AJ		 1515
1516 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1517 return -EBADF;
1518
5e762444
AJ		 1519 if (hci_blacklist_lookup(hdev, bdaddr))
1520 return -EEXIST;
b2a66aad
AJ		 1521
1522 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1523 if (!entry)
1524 return -ENOMEM;
b2a66aad
AJ		 1525
1526 bacpy(&entry->bdaddr, bdaddr);
1527
1528 list_add(&entry->list, &hdev->blacklist);
1529
88c1fe4b 1530 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1531}
1532
88c1fe4b 1533int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1534{
1535 struct bdaddr_list *entry;
b2a66aad 1536
1ec918ce 1537 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1538 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1539
1540 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1541 if (!entry)
5e762444 1542 return -ENOENT;
b2a66aad
AJ		 1543
1544 list_del(&entry->list);
1545 kfree(entry);
1546
88c1fe4b 1547 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1548}
1549
db323f2f 1550static void hci_clear_adv_cache(struct work_struct *work)
35815085 1551{
db323f2f 1552 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1553 adv_work.work);
35815085
AG		 1554
1555 hci_dev_lock(hdev);
1556
1557 hci_adv_entries_clear(hdev);
1558
1559 hci_dev_unlock(hdev);
1560}
1561
76c8686f
AG		 1562int hci_adv_entries_clear(struct hci_dev *hdev)
1563{
1564 struct adv_entry *entry, *tmp;
1565
1566 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1567 list_del(&entry->list);
1568 kfree(entry);
1569 }
1570
1571 BT_DBG("%s adv cache cleared", hdev->name);
1572
1573 return 0;
1574}
1575
1576struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1577{
1578 struct adv_entry *entry;
1579
1580 list_for_each_entry(entry, &hdev->adv_entries, list)
1581 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1582 return entry;
1583
1584 return NULL;
1585}
1586
1587static inline int is_connectable_adv(u8 evt_type)
1588{
1589 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1590 return 1;
1591
1592 return 0;
1593}
1594
1595int hci_add_adv_entry(struct hci_dev *hdev,
04124681 1596 struct hci_ev_le_advertising_info *ev) { struct adv_entry *entry; if (!is_connectable_adv(ev->evt_type))
76c8686f
AG		 1597 return -EINVAL;
1598
1599 /* Only new entries should be added to adv_entries. So, if
1600 * bdaddr was found, don't add it. */
1601 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1602 return 0;
1603
4777bfde 1604 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
76c8686f
AG		 1605 if (!entry)
1606 return -ENOMEM;
1607
1608 bacpy(&entry->bdaddr, &ev->bdaddr);
1609 entry->bdaddr_type = ev->bdaddr_type;
1610
1611 list_add(&entry->list, &hdev->adv_entries);
1612
1613 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1614 batostr(&entry->bdaddr), entry->bdaddr_type);
1615
1616 return 0;
1617}
1618
7ba8b4be
AG		 1619static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1620{
1621 struct le_scan_params *param = (struct le_scan_params *) opt;
1622 struct hci_cp_le_set_scan_param cp;
1623
1624 memset(&cp, 0, sizeof(cp));
1625 cp.type = param->type;
1626 cp.interval = cpu_to_le16(param->interval);
1627 cp.window = cpu_to_le16(param->window);
1628
1629 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1630}
1631
1632static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1633{
1634 struct hci_cp_le_set_scan_enable cp;
1635
1636 memset(&cp, 0, sizeof(cp));
1637 cp.enable = 1;
1638
1639 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1640}
1641
1642static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1643 u16 window, int timeout)
7ba8b4be
AG		 1644{
1645 long timeo = msecs_to_jiffies(3000);
1646 struct le_scan_params param;
1647 int err;
1648
1649 BT_DBG("%s", hdev->name);
1650
1651 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1652 return -EINPROGRESS;
1653
1654 param.type = type;
1655 param.interval = interval;
1656 param.window = window;
1657
1658 hci_req_lock(hdev);
1659
1660 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1661 timeo);
7ba8b4be
AG		 1662 if (!err)
1663 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1664
1665 hci_req_unlock(hdev);
1666
1667 if (err < 0)
1668 return err;
1669
1670 schedule_delayed_work(&hdev->le_scan_disable,
04124681 1671 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1672
1673 return 0;
1674}
1675
7dbfac1d
AG		 1676int hci_cancel_le_scan(struct hci_dev *hdev)
1677{
1678 BT_DBG("%s", hdev->name);
1679
1680 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1681 return -EALREADY;
1682
1683 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1684 struct hci_cp_le_set_scan_enable cp;
1685
1686 /* Send HCI command to disable LE Scan */
1687 memset(&cp, 0, sizeof(cp));
1688 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1689 }
1690
1691 return 0;
1692}
1693
7ba8b4be
AG		 1694static void le_scan_disable_work(struct work_struct *work)
1695{
1696 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1697 le_scan_disable.work);
7ba8b4be
AG		 1698 struct hci_cp_le_set_scan_enable cp;
1699
1700 BT_DBG("%s", hdev->name);
1701
1702 memset(&cp, 0, sizeof(cp));
1703
1704 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1705}
1706
28b75a89
AG		 1707static void le_scan_work(struct work_struct *work)
1708{
1709 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1710 struct le_scan_params *param = &hdev->le_scan_params;
1711
1712 BT_DBG("%s", hdev->name);
1713
04124681
GP		 1714 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1715 param->timeout);
28b75a89
AG		 1716}
1717
1718int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1719 int timeout)
28b75a89
AG		 1720{
1721 struct le_scan_params *param = &hdev->le_scan_params;
1722
1723 BT_DBG("%s", hdev->name);
1724
1725 if (work_busy(&hdev->le_scan))
1726 return -EINPROGRESS;
1727
1728 param->type = type;
1729 param->interval = interval;
1730 param->window = window;
1731 param->timeout = timeout;
1732
1733 queue_work(system_long_wq, &hdev->le_scan);
1734
1735 return 0;
1736}
1737
1da177e4
LT		 1738/* Register HCI device */
1739int hci_register_dev(struct hci_dev *hdev)
1740{
fc50744c 1741 struct list_head *head, *p;
08add513 1742 int i, id, error;
1da177e4 1743
010666a1 1744 if (!hdev->open || !hdev->close)
1da177e4
LT		 1745 return -EINVAL;
1746
fc50744c
UF		 1747 write_lock(&hci_dev_list_lock);
1748
08add513
MM		 1749 /* Do not allow HCI_AMP devices to register at index 0,
1750 * so the index can be used as the AMP controller ID.
1751 */
1752 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
fc50744c 1753 head = &hci_dev_list;
1da177e4
LT		 1754
1755 /* Find first available device id */
1756 list_for_each(p, &hci_dev_list) {
fc50744c
UF		 1757 int nid = list_entry(p, struct hci_dev, list)->id;
1758 if (nid > id)
1da177e4 1759 break;
fc50744c
UF		 1760 if (nid == id)
1761 id++;
1762 head = p;
1da177e4 1763 }
8e87d142 1764
1da177e4
LT		 1765 sprintf(hdev->name, "hci%d", id);
1766 hdev->id = id;
2d8b3a11
AE		 1767
1768 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1769
fc50744c 1770 list_add(&hdev->list, head);
1da177e4 1771
09fd0de5 1772 mutex_init(&hdev->lock);
1da177e4
LT		 1773
1774 hdev->flags = 0;
d23264a8 1775 hdev->dev_flags = 0;
1da177e4 1776 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1777 hdev->esco_type = (ESCO_HV1);
1da177e4 1778 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1779 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1780
04837f64
MH		 1781 hdev->idle_timeout = 0;
1782 hdev->sniff_max_interval = 800;
1783 hdev->sniff_min_interval = 80;
1784
b78752cc 1785 INIT_WORK(&hdev->rx_work, hci_rx_work);
c347b765 1786 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3eff45ea 1787 INIT_WORK(&hdev->tx_work, hci_tx_work);
b78752cc 1788
1da177e4
LT		 1789
1790 skb_queue_head_init(&hdev->rx_q);
1791 skb_queue_head_init(&hdev->cmd_q);
1792 skb_queue_head_init(&hdev->raw_q);
1793
6bd32326
VT		 1794 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1795
cd4c5391 1796 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1797 hdev->reassembly[i] = NULL;
1798
1da177e4 1799 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1800 mutex_init(&hdev->req_lock);
1da177e4 1801
30883512 1802 discovery_init(hdev);
1da177e4
LT		 1803
1804 hci_conn_hash_init(hdev);
1805
2e58ef3e
JH		 1806 INIT_LIST_HEAD(&hdev->mgmt_pending);
1807
ea4bd8ba 1808 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1809
2aeb9a1a
JH		 1810 INIT_LIST_HEAD(&hdev->uuids);
1811
55ed8ca1 1812 INIT_LIST_HEAD(&hdev->link_keys);
b899efaf 1813 INIT_LIST_HEAD(&hdev->long_term_keys);
55ed8ca1 1814
2763eda6
SJ		 1815 INIT_LIST_HEAD(&hdev->remote_oob_data);
1816
76c8686f
AG		 1817 INIT_LIST_HEAD(&hdev->adv_entries);
1818
db323f2f 1819 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
ab81cbf9 1820 INIT_WORK(&hdev->power_on, hci_power_on);
3243553f 1821 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
ab81cbf9 1822
16ab91ab
JH		 1823 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1824
1da177e4
LT		 1825 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1826
1827 atomic_set(&hdev->promisc, 0);
1828
28b75a89
AG		 1829 INIT_WORK(&hdev->le_scan, le_scan_work);
1830
7ba8b4be
AG		 1831 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1832
f20d09d5 1833 write_unlock(&hci_dev_list_lock);
1da177e4 1834
32845eb1
GP		 1835 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1836 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1837 if (!hdev->workqueue) {
1838 error = -ENOMEM;
1839 goto err;
1840 }
f48fd9c8 1841
33ca954d
DH		 1842 error = hci_add_sysfs(hdev);
1843 if (error < 0)
1844 goto err_wqueue;
1da177e4 1845
611b30f7
MH		 1846 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1847 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1848 if (hdev->rfkill) {
1849 if (rfkill_register(hdev->rfkill) < 0) {
1850 rfkill_destroy(hdev->rfkill);
1851 hdev->rfkill = NULL;
1852 }
1853 }
1854
a8b2d5c2
JH		 1855 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1856 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1857 schedule_work(&hdev->power_on);
ab81cbf9 1858
1da177e4 1859 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1860 hci_dev_hold(hdev);
1da177e4
LT		 1861
1862 return id;
f48fd9c8 1863
33ca954d
DH		 1864err_wqueue:
1865 destroy_workqueue(hdev->workqueue);
1866err:
f20d09d5 1867 write_lock(&hci_dev_list_lock);
f48fd9c8 1868 list_del(&hdev->list);
f20d09d5 1869 write_unlock(&hci_dev_list_lock);
f48fd9c8 1870
33ca954d 1871 return error;
1da177e4
LT		 1872}
1873EXPORT_SYMBOL(hci_register_dev);
1874
1875/* Unregister HCI device */
59735631 1876void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1877{
ef222013
MH		 1878 int i;
1879
c13854ce 1880 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1881
94324962
JH		 1882 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1883
f20d09d5 1884 write_lock(&hci_dev_list_lock);
1da177e4 1885 list_del(&hdev->list);
f20d09d5 1886 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1887
1888 hci_dev_do_close(hdev);
1889
cd4c5391 1890 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1891 kfree_skb(hdev->reassembly[i]);
1892
ab81cbf9 1893 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1894 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1895 hci_dev_lock(hdev);
744cf19e 1896 mgmt_index_removed(hdev);
09fd0de5 1897 hci_dev_unlock(hdev);
56e5cb86 1898 }
ab81cbf9 1899
2e58ef3e
JH		 1900 /* mgmt_index_removed should take care of emptying the
1901 * pending list */
1902 BUG_ON(!list_empty(&hdev->mgmt_pending));
1903
1da177e4
LT		 1904 hci_notify(hdev, HCI_DEV_UNREG);
1905
611b30f7
MH		 1906 if (hdev->rfkill) {
1907 rfkill_unregister(hdev->rfkill);
1908 rfkill_destroy(hdev->rfkill);
1909 }
1910
ce242970 1911 hci_del_sysfs(hdev);
147e2d59 1912
db323f2f 1913 cancel_delayed_work_sync(&hdev->adv_work);
c6f3c5f7 1914
f48fd9c8
MH		 1915 destroy_workqueue(hdev->workqueue);
1916
09fd0de5 1917 hci_dev_lock(hdev);
e2e0cacb 1918 hci_blacklist_clear(hdev);
2aeb9a1a 1919 hci_uuids_clear(hdev);
55ed8ca1 1920 hci_link_keys_clear(hdev);
b899efaf 1921 hci_smp_ltks_clear(hdev);
2763eda6 1922 hci_remote_oob_data_clear(hdev);
76c8686f 1923 hci_adv_entries_clear(hdev);
09fd0de5 1924 hci_dev_unlock(hdev);
e2e0cacb 1925
dc946bd8 1926 hci_dev_put(hdev);
1da177e4
LT		 1927}
1928EXPORT_SYMBOL(hci_unregister_dev);
1929
1930/* Suspend HCI device */
1931int hci_suspend_dev(struct hci_dev *hdev)
1932{
1933 hci_notify(hdev, HCI_DEV_SUSPEND);
1934 return 0;
1935}
1936EXPORT_SYMBOL(hci_suspend_dev);
1937
1938/* Resume HCI device */
1939int hci_resume_dev(struct hci_dev *hdev)
1940{
1941 hci_notify(hdev, HCI_DEV_RESUME);
1942 return 0;
1943}
1944EXPORT_SYMBOL(hci_resume_dev);
1945
76bca880
MH		 1946/* Receive frame from HCI drivers */
1947int hci_recv_frame(struct sk_buff *skb)
1948{
1949 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1950 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1951 && !test_bit(HCI_INIT, &hdev->flags))) {
1952 kfree_skb(skb);
1953 return -ENXIO;
1954 }
1955
1956 /* Incomming skb */
1957 bt_cb(skb)->incoming = 1;
1958
1959 /* Time stamp */
1960 __net_timestamp(skb);
1961
76bca880 1962 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1963 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1964
76bca880
MH		 1965 return 0;
1966}
1967EXPORT_SYMBOL(hci_recv_frame);
1968
33e882a5 1969static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1970 int count, __u8 index)
33e882a5
SS		 1971{
1972 int len = 0;
1973 int hlen = 0;
1974 int remain = count;
1975 struct sk_buff *skb;
1976 struct bt_skb_cb *scb;
1977
1978 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1979 index >= NUM_REASSEMBLY)
1980 return -EILSEQ;
1981
1982 skb = hdev->reassembly[index];
1983
1984 if (!skb) {
1985 switch (type) {
1986 case HCI_ACLDATA_PKT:
1987 len = HCI_MAX_FRAME_SIZE;
1988 hlen = HCI_ACL_HDR_SIZE;
1989 break;
1990 case HCI_EVENT_PKT:
1991 len = HCI_MAX_EVENT_SIZE;
1992 hlen = HCI_EVENT_HDR_SIZE;
1993 break;
1994 case HCI_SCODATA_PKT:
1995 len = HCI_MAX_SCO_SIZE;
1996 hlen = HCI_SCO_HDR_SIZE;
1997 break;
1998 }
1999
1e429f38 2000 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2001 if (!skb)
2002 return -ENOMEM;
2003
2004 scb = (void *) skb->cb;
2005 scb->expect = hlen;
2006 scb->pkt_type = type;
2007
2008 skb->dev = (void *) hdev;
2009 hdev->reassembly[index] = skb;
2010 }
2011
2012 while (count) {
2013 scb = (void *) skb->cb;
89bb46d0 2014 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2015
2016 memcpy(skb_put(skb, len), data, len);
2017
2018 count -= len;
2019 data += len;
2020 scb->expect -= len;
2021 remain = count;
2022
2023 switch (type) {
2024 case HCI_EVENT_PKT:
2025 if (skb->len == HCI_EVENT_HDR_SIZE) {
2026 struct hci_event_hdr *h = hci_event_hdr(skb);
2027 scb->expect = h->plen;
2028
2029 if (skb_tailroom(skb) < scb->expect) {
2030 kfree_skb(skb);
2031 hdev->reassembly[index] = NULL;
2032 return -ENOMEM;
2033 }
2034 }
2035 break;
2036
2037 case HCI_ACLDATA_PKT:
2038 if (skb->len == HCI_ACL_HDR_SIZE) {
2039 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2040 scb->expect = __le16_to_cpu(h->dlen);
2041
2042 if (skb_tailroom(skb) < scb->expect) {
2043 kfree_skb(skb);
2044 hdev->reassembly[index] = NULL;
2045 return -ENOMEM;
2046 }
2047 }
2048 break;
2049
2050 case HCI_SCODATA_PKT:
2051 if (skb->len == HCI_SCO_HDR_SIZE) {
2052 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2053 scb->expect = h->dlen;
2054
2055 if (skb_tailroom(skb) < scb->expect) {
2056 kfree_skb(skb);
2057 hdev->reassembly[index] = NULL;
2058 return -ENOMEM;
2059 }
2060 }
2061 break;
2062 }
2063
2064 if (scb->expect == 0) {
2065 /* Complete frame */
2066
2067 bt_cb(skb)->pkt_type = type;
2068 hci_recv_frame(skb);
2069
2070 hdev->reassembly[index] = NULL;
2071 return remain;
2072 }
2073 }
2074
2075 return remain;
2076}
2077
ef222013
MH		 2078int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2079{
f39a3c06
SS		 2080 int rem = 0;
2081
ef222013
MH		 2082 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2083 return -EILSEQ;
2084
da5f6c37 2085 while (count) {
1e429f38 2086 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2087 if (rem < 0)
2088 return rem;
ef222013 2089
f39a3c06
SS		 2090 data += (count - rem);
2091 count = rem;
f81c6224 2092 }
ef222013 2093
f39a3c06 2094 return rem;
ef222013
MH		 2095}
2096EXPORT_SYMBOL(hci_recv_fragment);
2097
99811510
SS		 2098#define STREAM_REASSEMBLY 0
2099
2100int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2101{
2102 int type;
2103 int rem = 0;
2104
da5f6c37 2105 while (count) {
99811510
SS		 2106 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2107
2108 if (!skb) {
2109 struct { char type; } *pkt;
2110
2111 /* Start of the frame */
2112 pkt = data;
2113 type = pkt->type;
2114
2115 data++;
2116 count--;
2117 } else
2118 type = bt_cb(skb)->pkt_type;
2119
1e429f38
GP		 2120 rem = hci_reassembly(hdev, type, data, count,
2121 STREAM_REASSEMBLY);
99811510
SS		 2122 if (rem < 0)
2123 return rem;
2124
2125 data += (count - rem);
2126 count = rem;
f81c6224 2127 }
99811510
SS		 2128
2129 return rem;
2130}
2131EXPORT_SYMBOL(hci_recv_stream_fragment);
2132
1da177e4
LT		 2133/* ---- Interface to upper protocols ---- */
2134
1da177e4
LT		 2135int hci_register_cb(struct hci_cb *cb)
2136{
2137 BT_DBG("%p name %s", cb, cb->name);
2138
f20d09d5 2139 write_lock(&hci_cb_list_lock);
1da177e4 2140 list_add(&cb->list, &hci_cb_list);
f20d09d5 2141 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2142
2143 return 0;
2144}
2145EXPORT_SYMBOL(hci_register_cb);
2146
2147int hci_unregister_cb(struct hci_cb *cb)
2148{
2149 BT_DBG("%p name %s", cb, cb->name);
2150
f20d09d5 2151 write_lock(&hci_cb_list_lock);
1da177e4 2152 list_del(&cb->list);
f20d09d5 2153 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2154
2155 return 0;
2156}
2157EXPORT_SYMBOL(hci_unregister_cb);
2158
2159static int hci_send_frame(struct sk_buff *skb)
2160{
2161 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2162
2163 if (!hdev) {
2164 kfree_skb(skb);
2165 return -ENODEV;
2166 }
2167
0d48d939 2168 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2169
cd82e61c
MH		 2170 /* Time stamp */
2171 __net_timestamp(skb);
1da177e4 2172
cd82e61c
MH		 2173 /* Send copy to monitor */
2174 hci_send_to_monitor(hdev, skb);
2175
2176 if (atomic_read(&hdev->promisc)) {
2177 /* Send copy to the sockets */
470fe1b5 2178 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2179 }
2180
2181 /* Get rid of skb owner, prior to sending to the driver. */
2182 skb_orphan(skb);
2183
2184 return hdev->send(skb);
2185}
2186
2187/* Send HCI command */
a9de9248 2188int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2189{
2190 int len = HCI_COMMAND_HDR_SIZE + plen;
2191 struct hci_command_hdr *hdr;
2192 struct sk_buff *skb;
2193
a9de9248 2194 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2195
2196 skb = bt_skb_alloc(len, GFP_ATOMIC);
2197 if (!skb) {
ef222013 2198 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2199 return -ENOMEM;
2200 }
2201
2202 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2203 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2204 hdr->plen = plen;
2205
2206 if (plen)
2207 memcpy(skb_put(skb, plen), param, plen);
2208
2209 BT_DBG("skb len %d", skb->len);
2210
0d48d939 2211 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2212 skb->dev = (void *) hdev;
c78ae283 2213
a5040efa
JH		 2214 if (test_bit(HCI_INIT, &hdev->flags))
2215 hdev->init_last_cmd = opcode;
2216
1da177e4 2217 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2218 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2219
2220 return 0;
2221}
1da177e4
LT		 2222
2223/* Get data from the previously sent command */
a9de9248 2224void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2225{
2226 struct hci_command_hdr *hdr;
2227
2228 if (!hdev->sent_cmd)
2229 return NULL;
2230
2231 hdr = (void *) hdev->sent_cmd->data;
2232
a9de9248 2233 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2234 return NULL;
2235
a9de9248 2236 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2237
2238 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2239}
2240
2241/* Send ACL data */
2242static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2243{
2244 struct hci_acl_hdr *hdr;
2245 int len = skb->len;
2246
badff6d0
ACM		 2247 skb_push(skb, HCI_ACL_HDR_SIZE);
2248 skb_reset_transport_header(skb);
9c70220b 2249 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2250 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2251 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2252}
2253
73d80deb
LAD		 2254static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2255 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2256{
2257 struct hci_dev *hdev = conn->hdev;
2258 struct sk_buff *list;
2259
70f23020
AE		 2260 list = skb_shinfo(skb)->frag_list;
2261 if (!list) {
1da177e4
LT		 2262 /* Non fragmented */
2263 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2264
73d80deb 2265 skb_queue_tail(queue, skb);
1da177e4
LT		 2266 } else {
2267 /* Fragmented */
2268 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2269
2270 skb_shinfo(skb)->frag_list = NULL;
2271
2272 /* Queue all fragments atomically */
af3e6359 2273 spin_lock(&queue->lock);
1da177e4 2274
73d80deb 2275 __skb_queue_tail(queue, skb);
e702112f
AE		 2276
2277 flags &= ~ACL_START;
2278 flags |= ACL_CONT;
1da177e4
LT		 2279 do {
2280 skb = list; list = list->next;
8e87d142 2281
1da177e4 2282 skb->dev = (void *) hdev;
0d48d939 2283 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2284 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2285
2286 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2287
73d80deb 2288 __skb_queue_tail(queue, skb);
1da177e4
LT		 2289 } while (list);
2290
af3e6359 2291 spin_unlock(&queue->lock);
1da177e4 2292 }
73d80deb
LAD		 2293}
2294
2295void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2296{
2297 struct hci_conn *conn = chan->conn;
2298 struct hci_dev *hdev = conn->hdev;
2299
2300 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2301
2302 skb->dev = (void *) hdev;
2303 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2304 hci_add_acl_hdr(skb, conn->handle, flags);
2305
2306 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2307
3eff45ea 2308 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2309}
2310EXPORT_SYMBOL(hci_send_acl);
2311
2312/* Send SCO data */
0d861d8b 2313void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2314{
2315 struct hci_dev *hdev = conn->hdev;
2316 struct hci_sco_hdr hdr;
2317
2318 BT_DBG("%s len %d", hdev->name, skb->len);
2319
aca3192c 2320 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2321 hdr.dlen = skb->len;
2322
badff6d0
ACM		 2323 skb_push(skb, HCI_SCO_HDR_SIZE);
2324 skb_reset_transport_header(skb);
9c70220b 2325 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2326
2327 skb->dev = (void *) hdev;
0d48d939 2328 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2329
1da177e4 2330 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2331 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2332}
2333EXPORT_SYMBOL(hci_send_sco);
2334
2335/* ---- HCI TX task (outgoing data) ---- */
2336
2337/* HCI Connection scheduler */
2338static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2339{
2340 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2341 struct hci_conn *conn = NULL, *c;
abc5de8f 2342 unsigned int num = 0, min = ~0;
1da177e4 2343
8e87d142 2344 /* We don't have to lock device here. Connections are always
1da177e4 2345 * added and removed with TX task disabled. */
bf4c6325
GP		 2346
2347 rcu_read_lock();
2348
2349 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2350 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2351 continue;
769be974
MH		 2352
2353 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2354 continue;
2355
1da177e4
LT		 2356 num++;
2357
2358 if (c->sent < min) {
2359 min = c->sent;
2360 conn = c;
2361 }
52087a79
LAD		 2362
2363 if (hci_conn_num(hdev, type) == num)
2364 break;
1da177e4
LT		 2365 }
2366
bf4c6325
GP		 2367 rcu_read_unlock();
2368
1da177e4 2369 if (conn) {
6ed58ec5
VT		 2370 int cnt, q;
2371
2372 switch (conn->type) {
2373 case ACL_LINK:
2374 cnt = hdev->acl_cnt;
2375 break;
2376 case SCO_LINK:
2377 case ESCO_LINK:
2378 cnt = hdev->sco_cnt;
2379 break;
2380 case LE_LINK:
2381 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2382 break;
2383 default:
2384 cnt = 0;
2385 BT_ERR("Unknown link type");
2386 }
2387
2388 q = cnt / num;
1da177e4
LT		 2389 *quote = q ? q : 1;
2390 } else
2391 *quote = 0;
2392
2393 BT_DBG("conn %p quote %d", conn, *quote);
2394 return conn;
2395}
2396
bae1f5d9 2397static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2398{
2399 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2400 struct hci_conn *c;
1da177e4 2401
bae1f5d9 2402 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2403
bf4c6325
GP		 2404 rcu_read_lock();
2405
1da177e4 2406 /* Kill stalled connections */
bf4c6325 2407 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2408 if (c->type == type && c->sent) {
2409 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2410 hdev->name, batostr(&c->dst));
2411 hci_acl_disconn(c, 0x13);
2412 }
2413 }
bf4c6325
GP		 2414
2415 rcu_read_unlock();
1da177e4
LT		 2416}
2417
73d80deb
LAD		 2418static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2419 int *quote)
1da177e4 2420{
73d80deb
LAD		 2421 struct hci_conn_hash *h = &hdev->conn_hash;
2422 struct hci_chan *chan = NULL;
abc5de8f 2423 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2424 struct hci_conn *conn;
73d80deb
LAD		 2425 int cnt, q, conn_num = 0;
2426
2427 BT_DBG("%s", hdev->name);
2428
bf4c6325
GP		 2429 rcu_read_lock();
2430
2431 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2432 struct hci_chan *tmp;
2433
2434 if (conn->type != type)
2435 continue;
2436
2437 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2438 continue;
2439
2440 conn_num++;
2441
8192edef 2442 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2443 struct sk_buff *skb;
2444
2445 if (skb_queue_empty(&tmp->data_q))
2446 continue;
2447
2448 skb = skb_peek(&tmp->data_q);
2449 if (skb->priority < cur_prio)
2450 continue;
2451
2452 if (skb->priority > cur_prio) {
2453 num = 0;
2454 min = ~0;
2455 cur_prio = skb->priority;
2456 }
2457
2458 num++;
2459
2460 if (conn->sent < min) {
2461 min = conn->sent;
2462 chan = tmp;
2463 }
2464 }
2465
2466 if (hci_conn_num(hdev, type) == conn_num)
2467 break;
2468 }
2469
bf4c6325
GP		 2470 rcu_read_unlock();
2471
73d80deb
LAD		 2472 if (!chan)
2473 return NULL;
2474
2475 switch (chan->conn->type) {
2476 case ACL_LINK:
2477 cnt = hdev->acl_cnt;
2478 break;
2479 case SCO_LINK:
2480 case ESCO_LINK:
2481 cnt = hdev->sco_cnt;
2482 break;
2483 case LE_LINK:
2484 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2485 break;
2486 default:
2487 cnt = 0;
2488 BT_ERR("Unknown link type");
2489 }
2490
2491 q = cnt / num;
2492 *quote = q ? q : 1;
2493 BT_DBG("chan %p quote %d", chan, *quote);
2494 return chan;
2495}
2496
02b20f0b
LAD		 2497static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2498{
2499 struct hci_conn_hash *h = &hdev->conn_hash;
2500 struct hci_conn *conn;
2501 int num = 0;
2502
2503 BT_DBG("%s", hdev->name);
2504
bf4c6325
GP		 2505 rcu_read_lock();
2506
2507 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2508 struct hci_chan *chan;
2509
2510 if (conn->type != type)
2511 continue;
2512
2513 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2514 continue;
2515
2516 num++;
2517
8192edef 2518 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2519 struct sk_buff *skb;
2520
2521 if (chan->sent) {
2522 chan->sent = 0;
2523 continue;
2524 }
2525
2526 if (skb_queue_empty(&chan->data_q))
2527 continue;
2528
2529 skb = skb_peek(&chan->data_q);
2530 if (skb->priority >= HCI_PRIO_MAX - 1)
2531 continue;
2532
2533 skb->priority = HCI_PRIO_MAX - 1;
2534
2535 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2536 skb->priority);
2537 }
2538
2539 if (hci_conn_num(hdev, type) == num)
2540 break;
2541 }
bf4c6325
GP		 2542
2543 rcu_read_unlock();
2544
02b20f0b
LAD		 2545}
2546
b71d385a
AE		 2547static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2548{
2549 /* Calculate count of blocks used by this packet */
2550 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2551}
2552
63d2bc1b 2553static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2554{
1da177e4
LT		 2555 if (!test_bit(HCI_RAW, &hdev->flags)) {
2556 /* ACL tx timeout must be longer than maximum
2557 * link supervision timeout (40.9 seconds) */
63d2bc1b 2558 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
cc48dc0a 2559 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2560 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2561 }
63d2bc1b 2562}
1da177e4 2563
63d2bc1b
AE		 2564static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2565{
2566 unsigned int cnt = hdev->acl_cnt;
2567 struct hci_chan *chan;
2568 struct sk_buff *skb;
2569 int quote;
2570
2571 __check_timeout(hdev, cnt);
04837f64 2572
73d80deb
LAD		 2573 while (hdev->acl_cnt &&
2574 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2575 u32 priority = (skb_peek(&chan->data_q))->priority;
2576 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2577 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2578 skb->len, skb->priority);
2579
ec1cce24
LAD		 2580 /* Stop if priority has changed */
2581 if (skb->priority < priority)
2582 break;
2583
2584 skb = skb_dequeue(&chan->data_q);
2585
73d80deb 2586 hci_conn_enter_active_mode(chan->conn,
04124681 2587 bt_cb(skb)->force_active);
04837f64 2588
1da177e4
LT		 2589 hci_send_frame(skb);
2590 hdev->acl_last_tx = jiffies;
2591
2592 hdev->acl_cnt--;
73d80deb
LAD		 2593 chan->sent++;
2594 chan->conn->sent++;
1da177e4
LT		 2595 }
2596 }
02b20f0b
LAD		 2597
2598 if (cnt != hdev->acl_cnt)
2599 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2600}
2601
b71d385a
AE		 2602static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2603{
63d2bc1b 2604 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2605 struct hci_chan *chan;
2606 struct sk_buff *skb;
2607 int quote;
b71d385a 2608
63d2bc1b 2609 __check_timeout(hdev, cnt);
b71d385a
AE		 2610
2611 while (hdev->block_cnt > 0 &&
2612 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2613 u32 priority = (skb_peek(&chan->data_q))->priority;
2614 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2615 int blocks;
2616
2617 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2618 skb->len, skb->priority);
2619
2620 /* Stop if priority has changed */
2621 if (skb->priority < priority)
2622 break;
2623
2624 skb = skb_dequeue(&chan->data_q);
2625
2626 blocks = __get_blocks(hdev, skb);
2627 if (blocks > hdev->block_cnt)
2628 return;
2629
2630 hci_conn_enter_active_mode(chan->conn,
2631 bt_cb(skb)->force_active);
2632
2633 hci_send_frame(skb);
2634 hdev->acl_last_tx = jiffies;
2635
2636 hdev->block_cnt -= blocks;
2637 quote -= blocks;
2638
2639 chan->sent += blocks;
2640 chan->conn->sent += blocks;
2641 }
2642 }
2643
2644 if (cnt != hdev->block_cnt)
2645 hci_prio_recalculate(hdev, ACL_LINK);
2646}
2647
2648static inline void hci_sched_acl(struct hci_dev *hdev)
2649{
2650 BT_DBG("%s", hdev->name);
2651
2652 if (!hci_conn_num(hdev, ACL_LINK))
2653 return;
2654
2655 switch (hdev->flow_ctl_mode) {
2656 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2657 hci_sched_acl_pkt(hdev);
2658 break;
2659
2660 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2661 hci_sched_acl_blk(hdev);
2662 break;
2663 }
2664}
2665
1da177e4
LT		 2666/* Schedule SCO */
2667static inline void hci_sched_sco(struct hci_dev *hdev)
2668{
2669 struct hci_conn *conn;
2670 struct sk_buff *skb;
2671 int quote;
2672
2673 BT_DBG("%s", hdev->name);
2674
52087a79
LAD		 2675 if (!hci_conn_num(hdev, SCO_LINK))
2676 return;
2677
1da177e4
LT		 2678 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2679 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2680 BT_DBG("skb %p len %d", skb, skb->len);
2681 hci_send_frame(skb);
2682
2683 conn->sent++;
2684 if (conn->sent == ~0)
2685 conn->sent = 0;
2686 }
2687 }
2688}
2689
b6a0dc82
MH		 2690static inline void hci_sched_esco(struct hci_dev *hdev)
2691{
2692 struct hci_conn *conn;
2693 struct sk_buff *skb;
2694 int quote;
2695
2696 BT_DBG("%s", hdev->name);
2697
52087a79
LAD		 2698 if (!hci_conn_num(hdev, ESCO_LINK))
2699 return;
2700
b6a0dc82
MH		 2701 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2702 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2703 BT_DBG("skb %p len %d", skb, skb->len);
2704 hci_send_frame(skb);
2705
2706 conn->sent++;
2707 if (conn->sent == ~0)
2708 conn->sent = 0;
2709 }
2710 }
2711}
2712
6ed58ec5
VT		 2713static inline void hci_sched_le(struct hci_dev *hdev)
2714{
73d80deb 2715 struct hci_chan *chan;
6ed58ec5 2716 struct sk_buff *skb;
02b20f0b 2717 int quote, cnt, tmp;
6ed58ec5
VT		 2718
2719 BT_DBG("%s", hdev->name);
2720
52087a79
LAD		 2721 if (!hci_conn_num(hdev, LE_LINK))
2722 return;
2723
6ed58ec5
VT		 2724 if (!test_bit(HCI_RAW, &hdev->flags)) {
2725 /* LE tx timeout must be longer than maximum
2726 * link supervision timeout (40.9 seconds) */
bae1f5d9 2727 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2728 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2729 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2730 }
2731
2732 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2733 tmp = cnt;
73d80deb 2734 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2735 u32 priority = (skb_peek(&chan->data_q))->priority;
2736 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2737 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2738 skb->len, skb->priority);
6ed58ec5 2739
ec1cce24
LAD		 2740 /* Stop if priority has changed */
2741 if (skb->priority < priority)
2742 break;
2743
2744 skb = skb_dequeue(&chan->data_q);
2745
6ed58ec5
VT		 2746 hci_send_frame(skb);
2747 hdev->le_last_tx = jiffies;
2748
2749 cnt--;
73d80deb
LAD		 2750 chan->sent++;
2751 chan->conn->sent++;
6ed58ec5
VT		 2752 }
2753 }
73d80deb 2754
6ed58ec5
VT		 2755 if (hdev->le_pkts)
2756 hdev->le_cnt = cnt;
2757 else
2758 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2759
2760 if (cnt != tmp)
2761 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2762}
2763
3eff45ea 2764static void hci_tx_work(struct work_struct *work)
1da177e4 2765{
3eff45ea 2766 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2767 struct sk_buff *skb;
2768
6ed58ec5
VT		 2769 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2770 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2771
2772 /* Schedule queues and send stuff to HCI driver */
2773
2774 hci_sched_acl(hdev);
2775
2776 hci_sched_sco(hdev);
2777
b6a0dc82
MH		 2778 hci_sched_esco(hdev);
2779
6ed58ec5
VT		 2780 hci_sched_le(hdev);
2781
1da177e4
LT		 2782 /* Send next queued raw (unknown type) packet */
2783 while ((skb = skb_dequeue(&hdev->raw_q)))
2784 hci_send_frame(skb);
1da177e4
LT		 2785}
2786
25985edc 2787/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2788
2789/* ACL data packet */
2790static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2791{
2792 struct hci_acl_hdr *hdr = (void *) skb->data;
2793 struct hci_conn *conn;
2794 __u16 handle, flags;
2795
2796 skb_pull(skb, HCI_ACL_HDR_SIZE);
2797
2798 handle = __le16_to_cpu(hdr->handle);
2799 flags = hci_flags(handle);
2800 handle = hci_handle(handle);
2801
2802 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2803
2804 hdev->stat.acl_rx++;
2805
2806 hci_dev_lock(hdev);
2807 conn = hci_conn_hash_lookup_handle(hdev, handle);
2808 hci_dev_unlock(hdev);
8e87d142 2809
1da177e4 2810 if (conn) {
65983fc7 2811 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2812
1da177e4 2813 /* Send to upper protocol */
686ebf28
UF		 2814 l2cap_recv_acldata(conn, skb, flags);
2815 return;
1da177e4 2816 } else {
8e87d142 2817 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2818 hdev->name, handle);
2819 }
2820
2821 kfree_skb(skb);
2822}
2823
2824/* SCO data packet */
2825static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2826{
2827 struct hci_sco_hdr *hdr = (void *) skb->data;
2828 struct hci_conn *conn;
2829 __u16 handle;
2830
2831 skb_pull(skb, HCI_SCO_HDR_SIZE);
2832
2833 handle = __le16_to_cpu(hdr->handle);
2834
2835 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2836
2837 hdev->stat.sco_rx++;
2838
2839 hci_dev_lock(hdev);
2840 conn = hci_conn_hash_lookup_handle(hdev, handle);
2841 hci_dev_unlock(hdev);
2842
2843 if (conn) {
1da177e4 2844 /* Send to upper protocol */
686ebf28
UF		 2845 sco_recv_scodata(conn, skb);
2846 return;
1da177e4 2847 } else {
8e87d142 2848 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2849 hdev->name, handle);
2850 }
2851
2852 kfree_skb(skb);
2853}
2854
b78752cc 2855static void hci_rx_work(struct work_struct *work)
1da177e4 2856{
b78752cc 2857 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2858 struct sk_buff *skb;
2859
2860 BT_DBG("%s", hdev->name);
2861
1da177e4 2862 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2863 /* Send copy to monitor */
2864 hci_send_to_monitor(hdev, skb);
2865
1da177e4
LT		 2866 if (atomic_read(&hdev->promisc)) {
2867 /* Send copy to the sockets */
470fe1b5 2868 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2869 }
2870
2871 if (test_bit(HCI_RAW, &hdev->flags)) {
2872 kfree_skb(skb);
2873 continue;
2874 }
2875
2876 if (test_bit(HCI_INIT, &hdev->flags)) {
2877 /* Don't process data packets in this states. */
0d48d939 2878 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2879 case HCI_ACLDATA_PKT:
2880 case HCI_SCODATA_PKT:
2881 kfree_skb(skb);
2882 continue;
3ff50b79 2883 }
1da177e4
LT		 2884 }
2885
2886 /* Process frame */
0d48d939 2887 switch (bt_cb(skb)->pkt_type) {
1da177e4 2888 case HCI_EVENT_PKT:
b78752cc 2889 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2890 hci_event_packet(hdev, skb);
2891 break;
2892
2893 case HCI_ACLDATA_PKT:
2894 BT_DBG("%s ACL data packet", hdev->name);
2895 hci_acldata_packet(hdev, skb);
2896 break;
2897
2898 case HCI_SCODATA_PKT:
2899 BT_DBG("%s SCO data packet", hdev->name);
2900 hci_scodata_packet(hdev, skb);
2901 break;
2902
2903 default:
2904 kfree_skb(skb);
2905 break;
2906 }
2907 }
1da177e4
LT		 2908}
2909
c347b765 2910static void hci_cmd_work(struct work_struct *work)
1da177e4 2911{
c347b765 2912 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2913 struct sk_buff *skb;
2914
2915 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2916
1da177e4 2917 /* Send queued commands */
5a08ecce
AE		 2918 if (atomic_read(&hdev->cmd_cnt)) {
2919 skb = skb_dequeue(&hdev->cmd_q);
2920 if (!skb)
2921 return;
2922
7585b97a 2923 kfree_skb(hdev->sent_cmd);
1da177e4 2924
70f23020
AE		 2925 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2926 if (hdev->sent_cmd) {
1da177e4
LT		 2927 atomic_dec(&hdev->cmd_cnt);
2928 hci_send_frame(skb);
7bdb8a5c
SJ		 2929 if (test_bit(HCI_RESET, &hdev->flags))
2930 del_timer(&hdev->cmd_timer);
2931 else
2932 mod_timer(&hdev->cmd_timer,
6bd32326 2933 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2934 } else {
2935 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2936 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2937 }
2938 }
2939}
2519a1fc
AG		 2940
2941int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2942{
2943 /* General inquiry access code (GIAC) */
2944 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2945 struct hci_cp_inquiry cp;
2946
2947 BT_DBG("%s", hdev->name);
2948
2949 if (test_bit(HCI_INQUIRY, &hdev->flags))
2950 return -EINPROGRESS;
2951
4663262c
JH		 2952 inquiry_cache_flush(hdev);
2953
2519a1fc
AG		 2954 memset(&cp, 0, sizeof(cp));
2955 memcpy(&cp.lap, lap, sizeof(cp.lap));
2956 cp.length = length;
2957
2958 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2959}
023d5049
AG		 2960
2961int hci_cancel_inquiry(struct hci_dev *hdev)
2962{
2963 BT_DBG("%s", hdev->name);
2964
2965 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2966 return -EALREADY;
023d5049
AG		 2967
2968 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2969}
kernel source for telekom puls (alcatel/mediatek)