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Bluetooth: Remove strtoba header declared but not defined
[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{
1741 struct list_head *head = &hci_dev_list, *p;
08add513 1742 int i, id, error;
1da177e4 1743
e9b9cfa1 1744 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1745
010666a1 1746 if (!hdev->open || !hdev->close)
1da177e4
LT		 1747 return -EINVAL;
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;
1753
f20d09d5 1754 write_lock(&hci_dev_list_lock);
1da177e4
LT		 1755
1756 /* Find first available device id */
1757 list_for_each(p, &hci_dev_list) {
1758 if (list_entry(p, struct hci_dev, list)->id != id)
1759 break;
1760 head = p; id++;
1761 }
8e87d142 1762
1da177e4
LT		 1763 sprintf(hdev->name, "hci%d", id);
1764 hdev->id = id;
c6feeb28 1765 list_add_tail(&hdev->list, head);
1da177e4 1766
09fd0de5 1767 mutex_init(&hdev->lock);
1da177e4
LT		 1768
1769 hdev->flags = 0;
d23264a8 1770 hdev->dev_flags = 0;
1da177e4 1771 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1772 hdev->esco_type = (ESCO_HV1);
1da177e4 1773 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1774 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1775
04837f64
MH		 1776 hdev->idle_timeout = 0;
1777 hdev->sniff_max_interval = 800;
1778 hdev->sniff_min_interval = 80;
1779
b78752cc 1780 INIT_WORK(&hdev->rx_work, hci_rx_work);
c347b765 1781 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3eff45ea 1782 INIT_WORK(&hdev->tx_work, hci_tx_work);
b78752cc 1783
1da177e4
LT		 1784
1785 skb_queue_head_init(&hdev->rx_q);
1786 skb_queue_head_init(&hdev->cmd_q);
1787 skb_queue_head_init(&hdev->raw_q);
1788
6bd32326
VT		 1789 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1790
cd4c5391 1791 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1792 hdev->reassembly[i] = NULL;
1793
1da177e4 1794 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1795 mutex_init(&hdev->req_lock);
1da177e4 1796
30883512 1797 discovery_init(hdev);
1da177e4
LT		 1798
1799 hci_conn_hash_init(hdev);
1800
2e58ef3e
JH		 1801 INIT_LIST_HEAD(&hdev->mgmt_pending);
1802
ea4bd8ba 1803 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1804
2aeb9a1a
JH		 1805 INIT_LIST_HEAD(&hdev->uuids);
1806
55ed8ca1 1807 INIT_LIST_HEAD(&hdev->link_keys);
b899efaf 1808 INIT_LIST_HEAD(&hdev->long_term_keys);
55ed8ca1 1809
2763eda6
SJ		 1810 INIT_LIST_HEAD(&hdev->remote_oob_data);
1811
76c8686f
AG		 1812 INIT_LIST_HEAD(&hdev->adv_entries);
1813
db323f2f 1814 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
ab81cbf9 1815 INIT_WORK(&hdev->power_on, hci_power_on);
3243553f 1816 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
ab81cbf9 1817
16ab91ab
JH		 1818 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1819
1da177e4
LT		 1820 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1821
1822 atomic_set(&hdev->promisc, 0);
1823
28b75a89
AG		 1824 INIT_WORK(&hdev->le_scan, le_scan_work);
1825
7ba8b4be
AG		 1826 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1827
f20d09d5 1828 write_unlock(&hci_dev_list_lock);
1da177e4 1829
32845eb1
GP		 1830 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1831 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1832 if (!hdev->workqueue) {
1833 error = -ENOMEM;
1834 goto err;
1835 }
f48fd9c8 1836
33ca954d
DH		 1837 error = hci_add_sysfs(hdev);
1838 if (error < 0)
1839 goto err_wqueue;
1da177e4 1840
611b30f7
MH		 1841 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1842 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1843 if (hdev->rfkill) {
1844 if (rfkill_register(hdev->rfkill) < 0) {
1845 rfkill_destroy(hdev->rfkill);
1846 hdev->rfkill = NULL;
1847 }
1848 }
1849
a8b2d5c2
JH		 1850 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1851 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1852 schedule_work(&hdev->power_on);
ab81cbf9 1853
1da177e4 1854 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1855 hci_dev_hold(hdev);
1da177e4
LT		 1856
1857 return id;
f48fd9c8 1858
33ca954d
DH		 1859err_wqueue:
1860 destroy_workqueue(hdev->workqueue);
1861err:
f20d09d5 1862 write_lock(&hci_dev_list_lock);
f48fd9c8 1863 list_del(&hdev->list);
f20d09d5 1864 write_unlock(&hci_dev_list_lock);
f48fd9c8 1865
33ca954d 1866 return error;
1da177e4
LT		 1867}
1868EXPORT_SYMBOL(hci_register_dev);
1869
1870/* Unregister HCI device */
59735631 1871void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1872{
ef222013
MH		 1873 int i;
1874
c13854ce 1875 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1876
94324962
JH		 1877 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1878
f20d09d5 1879 write_lock(&hci_dev_list_lock);
1da177e4 1880 list_del(&hdev->list);
f20d09d5 1881 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1882
1883 hci_dev_do_close(hdev);
1884
cd4c5391 1885 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1886 kfree_skb(hdev->reassembly[i]);
1887
ab81cbf9 1888 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1889 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1890 hci_dev_lock(hdev);
744cf19e 1891 mgmt_index_removed(hdev);
09fd0de5 1892 hci_dev_unlock(hdev);
56e5cb86 1893 }
ab81cbf9 1894
2e58ef3e
JH		 1895 /* mgmt_index_removed should take care of emptying the
1896 * pending list */
1897 BUG_ON(!list_empty(&hdev->mgmt_pending));
1898
1da177e4
LT		 1899 hci_notify(hdev, HCI_DEV_UNREG);
1900
611b30f7
MH		 1901 if (hdev->rfkill) {
1902 rfkill_unregister(hdev->rfkill);
1903 rfkill_destroy(hdev->rfkill);
1904 }
1905
ce242970 1906 hci_del_sysfs(hdev);
147e2d59 1907
db323f2f 1908 cancel_delayed_work_sync(&hdev->adv_work);
c6f3c5f7 1909
f48fd9c8
MH		 1910 destroy_workqueue(hdev->workqueue);
1911
09fd0de5 1912 hci_dev_lock(hdev);
e2e0cacb 1913 hci_blacklist_clear(hdev);
2aeb9a1a 1914 hci_uuids_clear(hdev);
55ed8ca1 1915 hci_link_keys_clear(hdev);
b899efaf 1916 hci_smp_ltks_clear(hdev);
2763eda6 1917 hci_remote_oob_data_clear(hdev);
76c8686f 1918 hci_adv_entries_clear(hdev);
09fd0de5 1919 hci_dev_unlock(hdev);
e2e0cacb 1920
dc946bd8 1921 hci_dev_put(hdev);
1da177e4
LT		 1922}
1923EXPORT_SYMBOL(hci_unregister_dev);
1924
1925/* Suspend HCI device */
1926int hci_suspend_dev(struct hci_dev *hdev)
1927{
1928 hci_notify(hdev, HCI_DEV_SUSPEND);
1929 return 0;
1930}
1931EXPORT_SYMBOL(hci_suspend_dev);
1932
1933/* Resume HCI device */
1934int hci_resume_dev(struct hci_dev *hdev)
1935{
1936 hci_notify(hdev, HCI_DEV_RESUME);
1937 return 0;
1938}
1939EXPORT_SYMBOL(hci_resume_dev);
1940
76bca880
MH		 1941/* Receive frame from HCI drivers */
1942int hci_recv_frame(struct sk_buff *skb)
1943{
1944 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1945 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1946 && !test_bit(HCI_INIT, &hdev->flags))) {
1947 kfree_skb(skb);
1948 return -ENXIO;
1949 }
1950
1951 /* Incomming skb */
1952 bt_cb(skb)->incoming = 1;
1953
1954 /* Time stamp */
1955 __net_timestamp(skb);
1956
76bca880 1957 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1958 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1959
76bca880
MH		 1960 return 0;
1961}
1962EXPORT_SYMBOL(hci_recv_frame);
1963
33e882a5 1964static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1965 int count, __u8 index)
33e882a5
SS		 1966{
1967 int len = 0;
1968 int hlen = 0;
1969 int remain = count;
1970 struct sk_buff *skb;
1971 struct bt_skb_cb *scb;
1972
1973 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1974 index >= NUM_REASSEMBLY)
1975 return -EILSEQ;
1976
1977 skb = hdev->reassembly[index];
1978
1979 if (!skb) {
1980 switch (type) {
1981 case HCI_ACLDATA_PKT:
1982 len = HCI_MAX_FRAME_SIZE;
1983 hlen = HCI_ACL_HDR_SIZE;
1984 break;
1985 case HCI_EVENT_PKT:
1986 len = HCI_MAX_EVENT_SIZE;
1987 hlen = HCI_EVENT_HDR_SIZE;
1988 break;
1989 case HCI_SCODATA_PKT:
1990 len = HCI_MAX_SCO_SIZE;
1991 hlen = HCI_SCO_HDR_SIZE;
1992 break;
1993 }
1994
1e429f38 1995 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1996 if (!skb)
1997 return -ENOMEM;
1998
1999 scb = (void *) skb->cb;
2000 scb->expect = hlen;
2001 scb->pkt_type = type;
2002
2003 skb->dev = (void *) hdev;
2004 hdev->reassembly[index] = skb;
2005 }
2006
2007 while (count) {
2008 scb = (void *) skb->cb;
89bb46d0 2009 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2010
2011 memcpy(skb_put(skb, len), data, len);
2012
2013 count -= len;
2014 data += len;
2015 scb->expect -= len;
2016 remain = count;
2017
2018 switch (type) {
2019 case HCI_EVENT_PKT:
2020 if (skb->len == HCI_EVENT_HDR_SIZE) {
2021 struct hci_event_hdr *h = hci_event_hdr(skb);
2022 scb->expect = h->plen;
2023
2024 if (skb_tailroom(skb) < scb->expect) {
2025 kfree_skb(skb);
2026 hdev->reassembly[index] = NULL;
2027 return -ENOMEM;
2028 }
2029 }
2030 break;
2031
2032 case HCI_ACLDATA_PKT:
2033 if (skb->len == HCI_ACL_HDR_SIZE) {
2034 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2035 scb->expect = __le16_to_cpu(h->dlen);
2036
2037 if (skb_tailroom(skb) < scb->expect) {
2038 kfree_skb(skb);
2039 hdev->reassembly[index] = NULL;
2040 return -ENOMEM;
2041 }
2042 }
2043 break;
2044
2045 case HCI_SCODATA_PKT:
2046 if (skb->len == HCI_SCO_HDR_SIZE) {
2047 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2048 scb->expect = h->dlen;
2049
2050 if (skb_tailroom(skb) < scb->expect) {
2051 kfree_skb(skb);
2052 hdev->reassembly[index] = NULL;
2053 return -ENOMEM;
2054 }
2055 }
2056 break;
2057 }
2058
2059 if (scb->expect == 0) {
2060 /* Complete frame */
2061
2062 bt_cb(skb)->pkt_type = type;
2063 hci_recv_frame(skb);
2064
2065 hdev->reassembly[index] = NULL;
2066 return remain;
2067 }
2068 }
2069
2070 return remain;
2071}
2072
ef222013
MH		 2073int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2074{
f39a3c06
SS		 2075 int rem = 0;
2076
ef222013
MH		 2077 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2078 return -EILSEQ;
2079
da5f6c37 2080 while (count) {
1e429f38 2081 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2082 if (rem < 0)
2083 return rem;
ef222013 2084
f39a3c06
SS		 2085 data += (count - rem);
2086 count = rem;
f81c6224 2087 }
ef222013 2088
f39a3c06 2089 return rem;
ef222013
MH		 2090}
2091EXPORT_SYMBOL(hci_recv_fragment);
2092
99811510
SS		 2093#define STREAM_REASSEMBLY 0
2094
2095int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2096{
2097 int type;
2098 int rem = 0;
2099
da5f6c37 2100 while (count) {
99811510
SS		 2101 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2102
2103 if (!skb) {
2104 struct { char type; } *pkt;
2105
2106 /* Start of the frame */
2107 pkt = data;
2108 type = pkt->type;
2109
2110 data++;
2111 count--;
2112 } else
2113 type = bt_cb(skb)->pkt_type;
2114
1e429f38
GP		 2115 rem = hci_reassembly(hdev, type, data, count,
2116 STREAM_REASSEMBLY);
99811510
SS		 2117 if (rem < 0)
2118 return rem;
2119
2120 data += (count - rem);
2121 count = rem;
f81c6224 2122 }
99811510
SS		 2123
2124 return rem;
2125}
2126EXPORT_SYMBOL(hci_recv_stream_fragment);
2127
1da177e4
LT		 2128/* ---- Interface to upper protocols ---- */
2129
1da177e4
LT		 2130int hci_register_cb(struct hci_cb *cb)
2131{
2132 BT_DBG("%p name %s", cb, cb->name);
2133
f20d09d5 2134 write_lock(&hci_cb_list_lock);
1da177e4 2135 list_add(&cb->list, &hci_cb_list);
f20d09d5 2136 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2137
2138 return 0;
2139}
2140EXPORT_SYMBOL(hci_register_cb);
2141
2142int hci_unregister_cb(struct hci_cb *cb)
2143{
2144 BT_DBG("%p name %s", cb, cb->name);
2145
f20d09d5 2146 write_lock(&hci_cb_list_lock);
1da177e4 2147 list_del(&cb->list);
f20d09d5 2148 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2149
2150 return 0;
2151}
2152EXPORT_SYMBOL(hci_unregister_cb);
2153
2154static int hci_send_frame(struct sk_buff *skb)
2155{
2156 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2157
2158 if (!hdev) {
2159 kfree_skb(skb);
2160 return -ENODEV;
2161 }
2162
0d48d939 2163 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2164
cd82e61c
MH		 2165 /* Time stamp */
2166 __net_timestamp(skb);
1da177e4 2167
cd82e61c
MH		 2168 /* Send copy to monitor */
2169 hci_send_to_monitor(hdev, skb);
2170
2171 if (atomic_read(&hdev->promisc)) {
2172 /* Send copy to the sockets */
470fe1b5 2173 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2174 }
2175
2176 /* Get rid of skb owner, prior to sending to the driver. */
2177 skb_orphan(skb);
2178
2179 return hdev->send(skb);
2180}
2181
2182/* Send HCI command */
a9de9248 2183int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2184{
2185 int len = HCI_COMMAND_HDR_SIZE + plen;
2186 struct hci_command_hdr *hdr;
2187 struct sk_buff *skb;
2188
a9de9248 2189 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2190
2191 skb = bt_skb_alloc(len, GFP_ATOMIC);
2192 if (!skb) {
ef222013 2193 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2194 return -ENOMEM;
2195 }
2196
2197 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2198 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2199 hdr->plen = plen;
2200
2201 if (plen)
2202 memcpy(skb_put(skb, plen), param, plen);
2203
2204 BT_DBG("skb len %d", skb->len);
2205
0d48d939 2206 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2207 skb->dev = (void *) hdev;
c78ae283 2208
a5040efa
JH		 2209 if (test_bit(HCI_INIT, &hdev->flags))
2210 hdev->init_last_cmd = opcode;
2211
1da177e4 2212 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2213 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2214
2215 return 0;
2216}
1da177e4
LT		 2217
2218/* Get data from the previously sent command */
a9de9248 2219void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2220{
2221 struct hci_command_hdr *hdr;
2222
2223 if (!hdev->sent_cmd)
2224 return NULL;
2225
2226 hdr = (void *) hdev->sent_cmd->data;
2227
a9de9248 2228 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2229 return NULL;
2230
a9de9248 2231 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2232
2233 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2234}
2235
2236/* Send ACL data */
2237static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2238{
2239 struct hci_acl_hdr *hdr;
2240 int len = skb->len;
2241
badff6d0
ACM		 2242 skb_push(skb, HCI_ACL_HDR_SIZE);
2243 skb_reset_transport_header(skb);
9c70220b 2244 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2245 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2246 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2247}
2248
73d80deb
LAD		 2249static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2250 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2251{
2252 struct hci_dev *hdev = conn->hdev;
2253 struct sk_buff *list;
2254
70f23020
AE		 2255 list = skb_shinfo(skb)->frag_list;
2256 if (!list) {
1da177e4
LT		 2257 /* Non fragmented */
2258 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2259
73d80deb 2260 skb_queue_tail(queue, skb);
1da177e4
LT		 2261 } else {
2262 /* Fragmented */
2263 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2264
2265 skb_shinfo(skb)->frag_list = NULL;
2266
2267 /* Queue all fragments atomically */
af3e6359 2268 spin_lock(&queue->lock);
1da177e4 2269
73d80deb 2270 __skb_queue_tail(queue, skb);
e702112f
AE		 2271
2272 flags &= ~ACL_START;
2273 flags |= ACL_CONT;
1da177e4
LT		 2274 do {
2275 skb = list; list = list->next;
8e87d142 2276
1da177e4 2277 skb->dev = (void *) hdev;
0d48d939 2278 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2279 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2280
2281 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2282
73d80deb 2283 __skb_queue_tail(queue, skb);
1da177e4
LT		 2284 } while (list);
2285
af3e6359 2286 spin_unlock(&queue->lock);
1da177e4 2287 }
73d80deb
LAD		 2288}
2289
2290void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2291{
2292 struct hci_conn *conn = chan->conn;
2293 struct hci_dev *hdev = conn->hdev;
2294
2295 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2296
2297 skb->dev = (void *) hdev;
2298 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2299 hci_add_acl_hdr(skb, conn->handle, flags);
2300
2301 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2302
3eff45ea 2303 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2304}
2305EXPORT_SYMBOL(hci_send_acl);
2306
2307/* Send SCO data */
0d861d8b 2308void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2309{
2310 struct hci_dev *hdev = conn->hdev;
2311 struct hci_sco_hdr hdr;
2312
2313 BT_DBG("%s len %d", hdev->name, skb->len);
2314
aca3192c 2315 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2316 hdr.dlen = skb->len;
2317
badff6d0
ACM		 2318 skb_push(skb, HCI_SCO_HDR_SIZE);
2319 skb_reset_transport_header(skb);
9c70220b 2320 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2321
2322 skb->dev = (void *) hdev;
0d48d939 2323 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2324
1da177e4 2325 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2326 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2327}
2328EXPORT_SYMBOL(hci_send_sco);
2329
2330/* ---- HCI TX task (outgoing data) ---- */
2331
2332/* HCI Connection scheduler */
2333static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2334{
2335 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2336 struct hci_conn *conn = NULL, *c;
abc5de8f 2337 unsigned int num = 0, min = ~0;
1da177e4 2338
8e87d142 2339 /* We don't have to lock device here. Connections are always
1da177e4 2340 * added and removed with TX task disabled. */
bf4c6325
GP		 2341
2342 rcu_read_lock();
2343
2344 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2345 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2346 continue;
769be974
MH		 2347
2348 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2349 continue;
2350
1da177e4
LT		 2351 num++;
2352
2353 if (c->sent < min) {
2354 min = c->sent;
2355 conn = c;
2356 }
52087a79
LAD		 2357
2358 if (hci_conn_num(hdev, type) == num)
2359 break;
1da177e4
LT		 2360 }
2361
bf4c6325
GP		 2362 rcu_read_unlock();
2363
1da177e4 2364 if (conn) {
6ed58ec5
VT		 2365 int cnt, q;
2366
2367 switch (conn->type) {
2368 case ACL_LINK:
2369 cnt = hdev->acl_cnt;
2370 break;
2371 case SCO_LINK:
2372 case ESCO_LINK:
2373 cnt = hdev->sco_cnt;
2374 break;
2375 case LE_LINK:
2376 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2377 break;
2378 default:
2379 cnt = 0;
2380 BT_ERR("Unknown link type");
2381 }
2382
2383 q = cnt / num;
1da177e4
LT		 2384 *quote = q ? q : 1;
2385 } else
2386 *quote = 0;
2387
2388 BT_DBG("conn %p quote %d", conn, *quote);
2389 return conn;
2390}
2391
bae1f5d9 2392static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2393{
2394 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2395 struct hci_conn *c;
1da177e4 2396
bae1f5d9 2397 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2398
bf4c6325
GP		 2399 rcu_read_lock();
2400
1da177e4 2401 /* Kill stalled connections */
bf4c6325 2402 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2403 if (c->type == type && c->sent) {
2404 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2405 hdev->name, batostr(&c->dst));
2406 hci_acl_disconn(c, 0x13);
2407 }
2408 }
bf4c6325
GP		 2409
2410 rcu_read_unlock();
1da177e4
LT		 2411}
2412
73d80deb
LAD		 2413static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2414 int *quote)
1da177e4 2415{
73d80deb
LAD		 2416 struct hci_conn_hash *h = &hdev->conn_hash;
2417 struct hci_chan *chan = NULL;
abc5de8f 2418 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2419 struct hci_conn *conn;
73d80deb
LAD		 2420 int cnt, q, conn_num = 0;
2421
2422 BT_DBG("%s", hdev->name);
2423
bf4c6325
GP		 2424 rcu_read_lock();
2425
2426 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2427 struct hci_chan *tmp;
2428
2429 if (conn->type != type)
2430 continue;
2431
2432 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2433 continue;
2434
2435 conn_num++;
2436
8192edef 2437 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2438 struct sk_buff *skb;
2439
2440 if (skb_queue_empty(&tmp->data_q))
2441 continue;
2442
2443 skb = skb_peek(&tmp->data_q);
2444 if (skb->priority < cur_prio)
2445 continue;
2446
2447 if (skb->priority > cur_prio) {
2448 num = 0;
2449 min = ~0;
2450 cur_prio = skb->priority;
2451 }
2452
2453 num++;
2454
2455 if (conn->sent < min) {
2456 min = conn->sent;
2457 chan = tmp;
2458 }
2459 }
2460
2461 if (hci_conn_num(hdev, type) == conn_num)
2462 break;
2463 }
2464
bf4c6325
GP		 2465 rcu_read_unlock();
2466
73d80deb
LAD		 2467 if (!chan)
2468 return NULL;
2469
2470 switch (chan->conn->type) {
2471 case ACL_LINK:
2472 cnt = hdev->acl_cnt;
2473 break;
2474 case SCO_LINK:
2475 case ESCO_LINK:
2476 cnt = hdev->sco_cnt;
2477 break;
2478 case LE_LINK:
2479 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2480 break;
2481 default:
2482 cnt = 0;
2483 BT_ERR("Unknown link type");
2484 }
2485
2486 q = cnt / num;
2487 *quote = q ? q : 1;
2488 BT_DBG("chan %p quote %d", chan, *quote);
2489 return chan;
2490}
2491
02b20f0b
LAD		 2492static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2493{
2494 struct hci_conn_hash *h = &hdev->conn_hash;
2495 struct hci_conn *conn;
2496 int num = 0;
2497
2498 BT_DBG("%s", hdev->name);
2499
bf4c6325
GP		 2500 rcu_read_lock();
2501
2502 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2503 struct hci_chan *chan;
2504
2505 if (conn->type != type)
2506 continue;
2507
2508 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2509 continue;
2510
2511 num++;
2512
8192edef 2513 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2514 struct sk_buff *skb;
2515
2516 if (chan->sent) {
2517 chan->sent = 0;
2518 continue;
2519 }
2520
2521 if (skb_queue_empty(&chan->data_q))
2522 continue;
2523
2524 skb = skb_peek(&chan->data_q);
2525 if (skb->priority >= HCI_PRIO_MAX - 1)
2526 continue;
2527
2528 skb->priority = HCI_PRIO_MAX - 1;
2529
2530 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2531 skb->priority);
2532 }
2533
2534 if (hci_conn_num(hdev, type) == num)
2535 break;
2536 }
bf4c6325
GP		 2537
2538 rcu_read_unlock();
2539
02b20f0b
LAD		 2540}
2541
b71d385a
AE		 2542static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2543{
2544 /* Calculate count of blocks used by this packet */
2545 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2546}
2547
63d2bc1b 2548static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2549{
1da177e4
LT		 2550 if (!test_bit(HCI_RAW, &hdev->flags)) {
2551 /* ACL tx timeout must be longer than maximum
2552 * link supervision timeout (40.9 seconds) */
63d2bc1b 2553 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
cc48dc0a 2554 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2555 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2556 }
63d2bc1b 2557}
1da177e4 2558
63d2bc1b
AE		 2559static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2560{
2561 unsigned int cnt = hdev->acl_cnt;
2562 struct hci_chan *chan;
2563 struct sk_buff *skb;
2564 int quote;
2565
2566 __check_timeout(hdev, cnt);
04837f64 2567
73d80deb
LAD		 2568 while (hdev->acl_cnt &&
2569 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2570 u32 priority = (skb_peek(&chan->data_q))->priority;
2571 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2572 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2573 skb->len, skb->priority);
2574
ec1cce24
LAD		 2575 /* Stop if priority has changed */
2576 if (skb->priority < priority)
2577 break;
2578
2579 skb = skb_dequeue(&chan->data_q);
2580
73d80deb 2581 hci_conn_enter_active_mode(chan->conn,
04124681 2582 bt_cb(skb)->force_active);
04837f64 2583
1da177e4
LT		 2584 hci_send_frame(skb);
2585 hdev->acl_last_tx = jiffies;
2586
2587 hdev->acl_cnt--;
73d80deb
LAD		 2588 chan->sent++;
2589 chan->conn->sent++;
1da177e4
LT		 2590 }
2591 }
02b20f0b
LAD		 2592
2593 if (cnt != hdev->acl_cnt)
2594 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2595}
2596
b71d385a
AE		 2597static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2598{
63d2bc1b 2599 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2600 struct hci_chan *chan;
2601 struct sk_buff *skb;
2602 int quote;
b71d385a 2603
63d2bc1b 2604 __check_timeout(hdev, cnt);
b71d385a
AE		 2605
2606 while (hdev->block_cnt > 0 &&
2607 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2608 u32 priority = (skb_peek(&chan->data_q))->priority;
2609 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2610 int blocks;
2611
2612 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2613 skb->len, skb->priority);
2614
2615 /* Stop if priority has changed */
2616 if (skb->priority < priority)
2617 break;
2618
2619 skb = skb_dequeue(&chan->data_q);
2620
2621 blocks = __get_blocks(hdev, skb);
2622 if (blocks > hdev->block_cnt)
2623 return;
2624
2625 hci_conn_enter_active_mode(chan->conn,
2626 bt_cb(skb)->force_active);
2627
2628 hci_send_frame(skb);
2629 hdev->acl_last_tx = jiffies;
2630
2631 hdev->block_cnt -= blocks;
2632 quote -= blocks;
2633
2634 chan->sent += blocks;
2635 chan->conn->sent += blocks;
2636 }
2637 }
2638
2639 if (cnt != hdev->block_cnt)
2640 hci_prio_recalculate(hdev, ACL_LINK);
2641}
2642
2643static inline void hci_sched_acl(struct hci_dev *hdev)
2644{
2645 BT_DBG("%s", hdev->name);
2646
2647 if (!hci_conn_num(hdev, ACL_LINK))
2648 return;
2649
2650 switch (hdev->flow_ctl_mode) {
2651 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2652 hci_sched_acl_pkt(hdev);
2653 break;
2654
2655 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2656 hci_sched_acl_blk(hdev);
2657 break;
2658 }
2659}
2660
1da177e4
LT		 2661/* Schedule SCO */
2662static inline void hci_sched_sco(struct hci_dev *hdev)
2663{
2664 struct hci_conn *conn;
2665 struct sk_buff *skb;
2666 int quote;
2667
2668 BT_DBG("%s", hdev->name);
2669
52087a79
LAD		 2670 if (!hci_conn_num(hdev, SCO_LINK))
2671 return;
2672
1da177e4
LT		 2673 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2674 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2675 BT_DBG("skb %p len %d", skb, skb->len);
2676 hci_send_frame(skb);
2677
2678 conn->sent++;
2679 if (conn->sent == ~0)
2680 conn->sent = 0;
2681 }
2682 }
2683}
2684
b6a0dc82
MH		 2685static inline void hci_sched_esco(struct hci_dev *hdev)
2686{
2687 struct hci_conn *conn;
2688 struct sk_buff *skb;
2689 int quote;
2690
2691 BT_DBG("%s", hdev->name);
2692
52087a79
LAD		 2693 if (!hci_conn_num(hdev, ESCO_LINK))
2694 return;
2695
b6a0dc82
MH		 2696 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2697 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2698 BT_DBG("skb %p len %d", skb, skb->len);
2699 hci_send_frame(skb);
2700
2701 conn->sent++;
2702 if (conn->sent == ~0)
2703 conn->sent = 0;
2704 }
2705 }
2706}
2707
6ed58ec5
VT		 2708static inline void hci_sched_le(struct hci_dev *hdev)
2709{
73d80deb 2710 struct hci_chan *chan;
6ed58ec5 2711 struct sk_buff *skb;
02b20f0b 2712 int quote, cnt, tmp;
6ed58ec5
VT		 2713
2714 BT_DBG("%s", hdev->name);
2715
52087a79
LAD		 2716 if (!hci_conn_num(hdev, LE_LINK))
2717 return;
2718
6ed58ec5
VT		 2719 if (!test_bit(HCI_RAW, &hdev->flags)) {
2720 /* LE tx timeout must be longer than maximum
2721 * link supervision timeout (40.9 seconds) */
bae1f5d9 2722 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2723 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2724 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2725 }
2726
2727 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2728 tmp = cnt;
73d80deb 2729 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2730 u32 priority = (skb_peek(&chan->data_q))->priority;
2731 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2732 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2733 skb->len, skb->priority);
6ed58ec5 2734
ec1cce24
LAD		 2735 /* Stop if priority has changed */
2736 if (skb->priority < priority)
2737 break;
2738
2739 skb = skb_dequeue(&chan->data_q);
2740
6ed58ec5
VT		 2741 hci_send_frame(skb);
2742 hdev->le_last_tx = jiffies;
2743
2744 cnt--;
73d80deb
LAD		 2745 chan->sent++;
2746 chan->conn->sent++;
6ed58ec5
VT		 2747 }
2748 }
73d80deb 2749
6ed58ec5
VT		 2750 if (hdev->le_pkts)
2751 hdev->le_cnt = cnt;
2752 else
2753 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2754
2755 if (cnt != tmp)
2756 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2757}
2758
3eff45ea 2759static void hci_tx_work(struct work_struct *work)
1da177e4 2760{
3eff45ea 2761 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2762 struct sk_buff *skb;
2763
6ed58ec5
VT		 2764 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2765 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2766
2767 /* Schedule queues and send stuff to HCI driver */
2768
2769 hci_sched_acl(hdev);
2770
2771 hci_sched_sco(hdev);
2772
b6a0dc82
MH		 2773 hci_sched_esco(hdev);
2774
6ed58ec5
VT		 2775 hci_sched_le(hdev);
2776
1da177e4
LT		 2777 /* Send next queued raw (unknown type) packet */
2778 while ((skb = skb_dequeue(&hdev->raw_q)))
2779 hci_send_frame(skb);
1da177e4
LT		 2780}
2781
25985edc 2782/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2783
2784/* ACL data packet */
2785static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2786{
2787 struct hci_acl_hdr *hdr = (void *) skb->data;
2788 struct hci_conn *conn;
2789 __u16 handle, flags;
2790
2791 skb_pull(skb, HCI_ACL_HDR_SIZE);
2792
2793 handle = __le16_to_cpu(hdr->handle);
2794 flags = hci_flags(handle);
2795 handle = hci_handle(handle);
2796
2797 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2798
2799 hdev->stat.acl_rx++;
2800
2801 hci_dev_lock(hdev);
2802 conn = hci_conn_hash_lookup_handle(hdev, handle);
2803 hci_dev_unlock(hdev);
8e87d142 2804
1da177e4 2805 if (conn) {
65983fc7 2806 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2807
1da177e4 2808 /* Send to upper protocol */
686ebf28
UF		 2809 l2cap_recv_acldata(conn, skb, flags);
2810 return;
1da177e4 2811 } else {
8e87d142 2812 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2813 hdev->name, handle);
2814 }
2815
2816 kfree_skb(skb);
2817}
2818
2819/* SCO data packet */
2820static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2821{
2822 struct hci_sco_hdr *hdr = (void *) skb->data;
2823 struct hci_conn *conn;
2824 __u16 handle;
2825
2826 skb_pull(skb, HCI_SCO_HDR_SIZE);
2827
2828 handle = __le16_to_cpu(hdr->handle);
2829
2830 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2831
2832 hdev->stat.sco_rx++;
2833
2834 hci_dev_lock(hdev);
2835 conn = hci_conn_hash_lookup_handle(hdev, handle);
2836 hci_dev_unlock(hdev);
2837
2838 if (conn) {
1da177e4 2839 /* Send to upper protocol */
686ebf28
UF		 2840 sco_recv_scodata(conn, skb);
2841 return;
1da177e4 2842 } else {
8e87d142 2843 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2844 hdev->name, handle);
2845 }
2846
2847 kfree_skb(skb);
2848}
2849
b78752cc 2850static void hci_rx_work(struct work_struct *work)
1da177e4 2851{
b78752cc 2852 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2853 struct sk_buff *skb;
2854
2855 BT_DBG("%s", hdev->name);
2856
1da177e4 2857 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2858 /* Send copy to monitor */
2859 hci_send_to_monitor(hdev, skb);
2860
1da177e4
LT		 2861 if (atomic_read(&hdev->promisc)) {
2862 /* Send copy to the sockets */
470fe1b5 2863 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2864 }
2865
2866 if (test_bit(HCI_RAW, &hdev->flags)) {
2867 kfree_skb(skb);
2868 continue;
2869 }
2870
2871 if (test_bit(HCI_INIT, &hdev->flags)) {
2872 /* Don't process data packets in this states. */
0d48d939 2873 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2874 case HCI_ACLDATA_PKT:
2875 case HCI_SCODATA_PKT:
2876 kfree_skb(skb);
2877 continue;
3ff50b79 2878 }
1da177e4
LT		 2879 }
2880
2881 /* Process frame */
0d48d939 2882 switch (bt_cb(skb)->pkt_type) {
1da177e4 2883 case HCI_EVENT_PKT:
b78752cc 2884 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2885 hci_event_packet(hdev, skb);
2886 break;
2887
2888 case HCI_ACLDATA_PKT:
2889 BT_DBG("%s ACL data packet", hdev->name);
2890 hci_acldata_packet(hdev, skb);
2891 break;
2892
2893 case HCI_SCODATA_PKT:
2894 BT_DBG("%s SCO data packet", hdev->name);
2895 hci_scodata_packet(hdev, skb);
2896 break;
2897
2898 default:
2899 kfree_skb(skb);
2900 break;
2901 }
2902 }
1da177e4
LT		 2903}
2904
c347b765 2905static void hci_cmd_work(struct work_struct *work)
1da177e4 2906{
c347b765 2907 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2908 struct sk_buff *skb;
2909
2910 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2911
1da177e4 2912 /* Send queued commands */
5a08ecce
AE		 2913 if (atomic_read(&hdev->cmd_cnt)) {
2914 skb = skb_dequeue(&hdev->cmd_q);
2915 if (!skb)
2916 return;
2917
7585b97a 2918 kfree_skb(hdev->sent_cmd);
1da177e4 2919
70f23020
AE		 2920 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2921 if (hdev->sent_cmd) {
1da177e4
LT		 2922 atomic_dec(&hdev->cmd_cnt);
2923 hci_send_frame(skb);
7bdb8a5c
SJ		 2924 if (test_bit(HCI_RESET, &hdev->flags))
2925 del_timer(&hdev->cmd_timer);
2926 else
2927 mod_timer(&hdev->cmd_timer,
6bd32326 2928 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2929 } else {
2930 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2931 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2932 }
2933 }
2934}
2519a1fc
AG		 2935
2936int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2937{
2938 /* General inquiry access code (GIAC) */
2939 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2940 struct hci_cp_inquiry cp;
2941
2942 BT_DBG("%s", hdev->name);
2943
2944 if (test_bit(HCI_INQUIRY, &hdev->flags))
2945 return -EINPROGRESS;
2946
4663262c
JH		 2947 inquiry_cache_flush(hdev);
2948
2519a1fc
AG		 2949 memset(&cp, 0, sizeof(cp));
2950 memcpy(&cp.lap, lap, sizeof(cp.lap));
2951 cp.length = length;
2952
2953 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2954}
023d5049
AG		 2955
2956int hci_cancel_inquiry(struct hci_dev *hdev)
2957{
2958 BT_DBG("%s", hdev->name);
2959
2960 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2961 return -EALREADY;
023d5049
AG		 2962
2963 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2964}
kernel source for telekom puls (alcatel/mediatek)