projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Bluetooth: Rename HCI_QUIRK_NO_RESET to HCI_QUIRK_RESET_ON_CLOSE
[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. */
a8c5fb1a
GP		 127static int __hci_request(struct hci_dev *hdev,
128 void (*req)(struct hci_dev *hdev, unsigned long opt),
129 unsigned long opt, __u32 timeout)
1da177e4
LT		 130{
131 DECLARE_WAITQUEUE(wait, current);
132 int err = 0;
133
134 BT_DBG("%s start", hdev->name);
135
136 hdev->req_status = HCI_REQ_PEND;
137
138 add_wait_queue(&hdev->req_wait_q, &wait);
139 set_current_state(TASK_INTERRUPTIBLE);
140
141 req(hdev, opt);
142 schedule_timeout(timeout);
143
144 remove_wait_queue(&hdev->req_wait_q, &wait);
145
146 if (signal_pending(current))
147 return -EINTR;
148
149 switch (hdev->req_status) {
150 case HCI_REQ_DONE:
e175072f 151 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 152 break;
153
154 case HCI_REQ_CANCELED:
155 err = -hdev->req_result;
156 break;
157
158 default:
159 err = -ETIMEDOUT;
160 break;
3ff50b79 161 }
1da177e4 162
a5040efa 163 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 164
165 BT_DBG("%s end: err %d", hdev->name, err);
166
167 return err;
168}
169
170static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 171 unsigned long opt, __u32 timeout)
1da177e4
LT		 172{
173 int ret;
174
7c6a329e
MH		 175 if (!test_bit(HCI_UP, &hdev->flags))
176 return -ENETDOWN;
177
1da177e4
LT		 178 /* Serialize all requests */
179 hci_req_lock(hdev);
180 ret = __hci_request(hdev, req, opt, timeout);
181 hci_req_unlock(hdev);
182
183 return ret;
184}
185
186static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
187{
188 BT_DBG("%s %ld", hdev->name, opt);
189
190 /* Reset device */
f630cf0d 191 set_bit(HCI_RESET, &hdev->flags);
a9de9248 192 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 193}
194
e61ef499 195static void bredr_init(struct hci_dev *hdev)
1da177e4 196{
b0916ea0 197 struct hci_cp_delete_stored_link_key cp;
1ebb9252 198 __le16 param;
89f2783d 199 __u8 flt_type;
1da177e4 200
2455a3ea
AE		 201 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
202
1da177e4
LT		 203 /* Mandatory initialization */
204
205 /* Reset */
a6c511c6 206 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
e61ef499
AE		 207 set_bit(HCI_RESET, &hdev->flags);
208 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 209 }
1da177e4
LT		 210
211 /* Read Local Supported Features */
a9de9248 212 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 213
1143e5a6 214 /* Read Local Version */
a9de9248 215 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 216
1da177e4 217 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 218 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 219
1da177e4 220 /* Read BD Address */
a9de9248
MH		 221 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
222
223 /* Read Class of Device */
224 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
225
226 /* Read Local Name */
227 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 228
229 /* Read Voice Setting */
a9de9248 230 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 231
232 /* Optional initialization */
233
234 /* Clear Event Filters */
89f2783d 235 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 236 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 237
1da177e4 238 /* Connection accept timeout ~20 secs */
aca3192c 239 param = cpu_to_le16(0x7d00);
a9de9248 240 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 241
242 bacpy(&cp.bdaddr, BDADDR_ANY);
243 cp.delete_all = 1;
244 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 245}
246
e61ef499
AE		 247static void amp_init(struct hci_dev *hdev)
248{
2455a3ea
AE		 249 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
250
e61ef499
AE		 251 /* Reset */
252 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
253
254 /* Read Local Version */
255 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 256
257 /* Read Local AMP Info */
258 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e61ef499
AE		 259}
260
261static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
262{
263 struct sk_buff *skb;
264
265 BT_DBG("%s %ld", hdev->name, opt);
266
267 /* Driver initialization */
268
269 /* Special commands */
270 while ((skb = skb_dequeue(&hdev->driver_init))) {
271 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
272 skb->dev = (void *) hdev;
273
274 skb_queue_tail(&hdev->cmd_q, skb);
275 queue_work(hdev->workqueue, &hdev->cmd_work);
276 }
277 skb_queue_purge(&hdev->driver_init);
278
279 switch (hdev->dev_type) {
280 case HCI_BREDR:
281 bredr_init(hdev);
282 break;
283
284 case HCI_AMP:
285 amp_init(hdev);
286 break;
287
288 default:
289 BT_ERR("Unknown device type %d", hdev->dev_type);
290 break;
291 }
292
293}
294
6ed58ec5
VT		 295static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
296{
297 BT_DBG("%s", hdev->name);
298
299 /* Read LE buffer size */
300 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
301}
302
1da177e4
LT		 303static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
304{
305 __u8 scan = opt;
306
307 BT_DBG("%s %x", hdev->name, scan);
308
309 /* Inquiry and Page scans */
a9de9248 310 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 311}
312
313static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
314{
315 __u8 auth = opt;
316
317 BT_DBG("%s %x", hdev->name, auth);
318
319 /* Authentication */
a9de9248 320 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 321}
322
323static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
324{
325 __u8 encrypt = opt;
326
327 BT_DBG("%s %x", hdev->name, encrypt);
328
e4e8e37c 329 /* Encryption */
a9de9248 330 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 331}
332
e4e8e37c
MH		 333static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
334{
335 __le16 policy = cpu_to_le16(opt);
336
a418b893 337 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 338
339 /* Default link policy */
340 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
341}
342
8e87d142 343/* Get HCI device by index.
1da177e4
LT		 344 * Device is held on return. */
345struct hci_dev *hci_dev_get(int index)
346{
8035ded4 347 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 348
349 BT_DBG("%d", index);
350
351 if (index < 0)
352 return NULL;
353
354 read_lock(&hci_dev_list_lock);
8035ded4 355 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 356 if (d->id == index) {
357 hdev = hci_dev_hold(d);
358 break;
359 }
360 }
361 read_unlock(&hci_dev_list_lock);
362 return hdev;
363}
1da177e4
LT		 364
365/* ---- Inquiry support ---- */
ff9ef578 366
30dc78e1
JH		 367bool hci_discovery_active(struct hci_dev *hdev)
368{
369 struct discovery_state *discov = &hdev->discovery;
370
6fbe195d 371 switch (discov->state) {
343f935b 372 case DISCOVERY_FINDING:
6fbe195d 373 case DISCOVERY_RESOLVING:
30dc78e1
JH		 374 return true;
375
6fbe195d
AG		 376 default:
377 return false;
378 }
30dc78e1
JH		 379}
380
ff9ef578
JH		 381void hci_discovery_set_state(struct hci_dev *hdev, int state)
382{
383 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
384
385 if (hdev->discovery.state == state)
386 return;
387
388 switch (state) {
389 case DISCOVERY_STOPPED:
7b99b659
AG		 390 if (hdev->discovery.state != DISCOVERY_STARTING)
391 mgmt_discovering(hdev, 0);
ff9ef578
JH		 392 break;
393 case DISCOVERY_STARTING:
394 break;
343f935b 395 case DISCOVERY_FINDING:
ff9ef578
JH		 396 mgmt_discovering(hdev, 1);
397 break;
30dc78e1
JH		 398 case DISCOVERY_RESOLVING:
399 break;
ff9ef578
JH		 400 case DISCOVERY_STOPPING:
401 break;
402 }
403
404 hdev->discovery.state = state;
405}
406
1da177e4
LT		 407static void inquiry_cache_flush(struct hci_dev *hdev)
408{
30883512 409 struct discovery_state *cache = &hdev->discovery;
b57c1a56 410 struct inquiry_entry *p, *n;
1da177e4 411
561aafbc
JH		 412 list_for_each_entry_safe(p, n, &cache->all, all) {
413 list_del(&p->all);
b57c1a56 414 kfree(p);
1da177e4 415 }
561aafbc
JH		 416
417 INIT_LIST_HEAD(&cache->unknown);
418 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 419}
420
a8c5fb1a
GP		 421struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
422 bdaddr_t *bdaddr)
1da177e4 423{
30883512 424 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 425 struct inquiry_entry *e;
426
427 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
428
561aafbc
JH		 429 list_for_each_entry(e, &cache->all, all) {
430 if (!bacmp(&e->data.bdaddr, bdaddr))
431 return e;
432 }
433
434 return NULL;
435}
436
437struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 438 bdaddr_t *bdaddr)
561aafbc 439{
30883512 440 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 441 struct inquiry_entry *e;
442
443 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
444
445 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 446 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 447 return e;
448 }
449
450 return NULL;
1da177e4
LT		 451}
452
30dc78e1 453struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 454 bdaddr_t *bdaddr,
455 int state)
30dc78e1
JH		 456{
457 struct discovery_state *cache = &hdev->discovery;
458 struct inquiry_entry *e;
459
460 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
461
462 list_for_each_entry(e, &cache->resolve, list) {
463 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
464 return e;
465 if (!bacmp(&e->data.bdaddr, bdaddr))
466 return e;
467 }
468
469 return NULL;
470}
471
a3d4e20a 472void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 473 struct inquiry_entry *ie)
a3d4e20a
JH		 474{
475 struct discovery_state *cache = &hdev->discovery;
476 struct list_head *pos = &cache->resolve;
477 struct inquiry_entry *p;
478
479 list_del(&ie->list);
480
481 list_for_each_entry(p, &cache->resolve, list) {
482 if (p->name_state != NAME_PENDING &&
a8c5fb1a 483 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 484 break;
485 pos = &p->list;
486 }
487
488 list_add(&ie->list, pos);
489}
490
3175405b 491bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 492 bool name_known, bool *ssp)
1da177e4 493{
30883512 494 struct discovery_state *cache = &hdev->discovery;
70f23020 495 struct inquiry_entry *ie;
1da177e4
LT		 496
497 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
498
388fc8fa
JH		 499 if (ssp)
500 *ssp = data->ssp_mode;
501
70f23020 502 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 503 if (ie) {
388fc8fa
JH		 504 if (ie->data.ssp_mode && ssp)
505 *ssp = true;
506
a3d4e20a 507 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 508 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 509 ie->data.rssi = data->rssi;
510 hci_inquiry_cache_update_resolve(hdev, ie);
511 }
512
561aafbc 513 goto update;
a3d4e20a 514 }
561aafbc
JH		 515
516 /* Entry not in the cache. Add new one. */
517 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
518 if (!ie)
3175405b 519 return false;
561aafbc
JH		 520
521 list_add(&ie->all, &cache->all);
522
523 if (name_known) {
524 ie->name_state = NAME_KNOWN;
525 } else {
526 ie->name_state = NAME_NOT_KNOWN;
527 list_add(&ie->list, &cache->unknown);
528 }
70f23020 529
561aafbc
JH		 530update:
531 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 532 ie->name_state != NAME_PENDING) {
561aafbc
JH		 533 ie->name_state = NAME_KNOWN;
534 list_del(&ie->list);
1da177e4
LT		 535 }
536
70f23020
AE		 537 memcpy(&ie->data, data, sizeof(*data));
538 ie->timestamp = jiffies;
1da177e4 539 cache->timestamp = jiffies;
3175405b
JH		 540
541 if (ie->name_state == NAME_NOT_KNOWN)
542 return false;
543
544 return true;
1da177e4
LT		 545}
546
547static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
548{
30883512 549 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 550 struct inquiry_info *info = (struct inquiry_info *) buf;
551 struct inquiry_entry *e;
552 int copied = 0;
553
561aafbc 554 list_for_each_entry(e, &cache->all, all) {
1da177e4 555 struct inquiry_data *data = &e->data;
b57c1a56
JH		 556
557 if (copied >= num)
558 break;
559
1da177e4
LT		 560 bacpy(&info->bdaddr, &data->bdaddr);
561 info->pscan_rep_mode = data->pscan_rep_mode;
562 info->pscan_period_mode = data->pscan_period_mode;
563 info->pscan_mode = data->pscan_mode;
564 memcpy(info->dev_class, data->dev_class, 3);
565 info->clock_offset = data->clock_offset;
b57c1a56 566
1da177e4 567 info++;
b57c1a56 568 copied++;
1da177e4
LT		 569 }
570
571 BT_DBG("cache %p, copied %d", cache, copied);
572 return copied;
573}
574
575static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
576{
577 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
578 struct hci_cp_inquiry cp;
579
580 BT_DBG("%s", hdev->name);
581
582 if (test_bit(HCI_INQUIRY, &hdev->flags))
583 return;
584
585 /* Start Inquiry */
586 memcpy(&cp.lap, &ir->lap, 3);
587 cp.length = ir->length;
588 cp.num_rsp = ir->num_rsp;
a9de9248 589 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 590}
591
592int hci_inquiry(void __user *arg)
593{
594 __u8 __user *ptr = arg;
595 struct hci_inquiry_req ir;
596 struct hci_dev *hdev;
597 int err = 0, do_inquiry = 0, max_rsp;
598 long timeo;
599 __u8 *buf;
600
601 if (copy_from_user(&ir, ptr, sizeof(ir)))
602 return -EFAULT;
603
5a08ecce
AE		 604 hdev = hci_dev_get(ir.dev_id);
605 if (!hdev)
1da177e4
LT		 606 return -ENODEV;
607
09fd0de5 608 hci_dev_lock(hdev);
8e87d142 609 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 610 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 611 inquiry_cache_flush(hdev);
612 do_inquiry = 1;
613 }
09fd0de5 614 hci_dev_unlock(hdev);
1da177e4 615
04837f64 616 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 617
618 if (do_inquiry) {
619 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
620 if (err < 0)
621 goto done;
622 }
1da177e4
LT		 623
624 /* for unlimited number of responses we will use buffer with 255 entries */
625 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
626
627 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
628 * copy it to the user space.
629 */
01df8c31 630 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 631 if (!buf) {
1da177e4
LT		 632 err = -ENOMEM;
633 goto done;
634 }
635
09fd0de5 636 hci_dev_lock(hdev);
1da177e4 637 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 638 hci_dev_unlock(hdev);
1da177e4
LT		 639
640 BT_DBG("num_rsp %d", ir.num_rsp);
641
642 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
643 ptr += sizeof(ir);
644 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 645 ir.num_rsp))
1da177e4 646 err = -EFAULT;
8e87d142 647 } else
1da177e4
LT		 648 err = -EFAULT;
649
650 kfree(buf);
651
652done:
653 hci_dev_put(hdev);
654 return err;
655}
656
657/* ---- HCI ioctl helpers ---- */
658
659int hci_dev_open(__u16 dev)
660{
661 struct hci_dev *hdev;
662 int ret = 0;
663
5a08ecce
AE		 664 hdev = hci_dev_get(dev);
665 if (!hdev)
1da177e4
LT		 666 return -ENODEV;
667
668 BT_DBG("%s %p", hdev->name, hdev);
669
670 hci_req_lock(hdev);
671
94324962
JH		 672 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
673 ret = -ENODEV;
674 goto done;
675 }
676
611b30f7
MH		 677 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
678 ret = -ERFKILL;
679 goto done;
680 }
681
1da177e4
LT		 682 if (test_bit(HCI_UP, &hdev->flags)) {
683 ret = -EALREADY;
684 goto done;
685 }
686
687 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
688 set_bit(HCI_RAW, &hdev->flags);
689
07e3b94a
AE		 690 /* Treat all non BR/EDR controllers as raw devices if
691 enable_hs is not set */
692 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 693 set_bit(HCI_RAW, &hdev->flags);
694
1da177e4
LT		 695 if (hdev->open(hdev)) {
696 ret = -EIO;
697 goto done;
698 }
699
700 if (!test_bit(HCI_RAW, &hdev->flags)) {
701 atomic_set(&hdev->cmd_cnt, 1);
702 set_bit(HCI_INIT, &hdev->flags);
a5040efa 703 hdev->init_last_cmd = 0;
1da177e4 704
04837f64 705 ret = __hci_request(hdev, hci_init_req, 0,
a8c5fb1a 706 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 707
eead27da 708 if (lmp_host_le_capable(hdev))
6ed58ec5 709 ret = __hci_request(hdev, hci_le_init_req, 0,
a8c5fb1a 710 msecs_to_jiffies(HCI_INIT_TIMEOUT));
6ed58ec5 711
1da177e4
LT		 712 clear_bit(HCI_INIT, &hdev->flags);
713 }
714
715 if (!ret) {
716 hci_dev_hold(hdev);
717 set_bit(HCI_UP, &hdev->flags);
718 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 719 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 720 hci_dev_lock(hdev);
744cf19e 721 mgmt_powered(hdev, 1);
09fd0de5 722 hci_dev_unlock(hdev);
56e5cb86 723 }
8e87d142 724 } else {
1da177e4 725 /* Init failed, cleanup */
3eff45ea 726 flush_work(&hdev->tx_work);
c347b765 727 flush_work(&hdev->cmd_work);
b78752cc 728 flush_work(&hdev->rx_work);
1da177e4
LT		 729
730 skb_queue_purge(&hdev->cmd_q);
731 skb_queue_purge(&hdev->rx_q);
732
733 if (hdev->flush)
734 hdev->flush(hdev);
735
736 if (hdev->sent_cmd) {
737 kfree_skb(hdev->sent_cmd);
738 hdev->sent_cmd = NULL;
739 }
740
741 hdev->close(hdev);
742 hdev->flags = 0;
743 }
744
745done:
746 hci_req_unlock(hdev);
747 hci_dev_put(hdev);
748 return ret;
749}
750
751static int hci_dev_do_close(struct hci_dev *hdev)
752{
753 BT_DBG("%s %p", hdev->name, hdev);
754
28b75a89
AG		 755 cancel_work_sync(&hdev->le_scan);
756
1da177e4
LT		 757 hci_req_cancel(hdev, ENODEV);
758 hci_req_lock(hdev);
759
760 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 761 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 762 hci_req_unlock(hdev);
763 return 0;
764 }
765
3eff45ea
GP		 766 /* Flush RX and TX works */
767 flush_work(&hdev->tx_work);
b78752cc 768 flush_work(&hdev->rx_work);
1da177e4 769
16ab91ab 770 if (hdev->discov_timeout > 0) {
e0f9309f 771 cancel_delayed_work(&hdev->discov_off);
16ab91ab 772 hdev->discov_timeout = 0;
5e5282bb 773 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 774 }
775
a8b2d5c2 776 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 777 cancel_delayed_work(&hdev->service_cache);
778
7ba8b4be
AG		 779 cancel_delayed_work_sync(&hdev->le_scan_disable);
780
09fd0de5 781 hci_dev_lock(hdev);
1da177e4
LT		 782 inquiry_cache_flush(hdev);
783 hci_conn_hash_flush(hdev);
09fd0de5 784 hci_dev_unlock(hdev);
1da177e4
LT		 785
786 hci_notify(hdev, HCI_DEV_DOWN);
787
788 if (hdev->flush)
789 hdev->flush(hdev);
790
791 /* Reset device */
792 skb_queue_purge(&hdev->cmd_q);
793 atomic_set(&hdev->cmd_cnt, 1);
8af59467 794 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 795 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 796 set_bit(HCI_INIT, &hdev->flags);
04837f64 797 __hci_request(hdev, hci_reset_req, 0,
a8c5fb1a 798 msecs_to_jiffies(250));
1da177e4
LT		 799 clear_bit(HCI_INIT, &hdev->flags);
800 }
801
c347b765
GP		 802 /* flush cmd work */
803 flush_work(&hdev->cmd_work);
1da177e4
LT		 804
805 /* Drop queues */
806 skb_queue_purge(&hdev->rx_q);
807 skb_queue_purge(&hdev->cmd_q);
808 skb_queue_purge(&hdev->raw_q);
809
810 /* Drop last sent command */
811 if (hdev->sent_cmd) {
b79f44c1 812 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 813 kfree_skb(hdev->sent_cmd);
814 hdev->sent_cmd = NULL;
815 }
816
817 /* After this point our queues are empty
818 * and no tasks are scheduled. */
819 hdev->close(hdev);
820
8ee56540
MH		 821 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
822 hci_dev_lock(hdev);
823 mgmt_powered(hdev, 0);
824 hci_dev_unlock(hdev);
825 }
5add6af8 826
1da177e4
LT		 827 /* Clear flags */
828 hdev->flags = 0;
829
e59fda8d 830 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 831 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 832
1da177e4
LT		 833 hci_req_unlock(hdev);
834
835 hci_dev_put(hdev);
836 return 0;
837}
838
839int hci_dev_close(__u16 dev)
840{
841 struct hci_dev *hdev;
842 int err;
843
70f23020
AE		 844 hdev = hci_dev_get(dev);
845 if (!hdev)
1da177e4 846 return -ENODEV;
8ee56540
MH		 847
848 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
849 cancel_delayed_work(&hdev->power_off);
850
1da177e4 851 err = hci_dev_do_close(hdev);
8ee56540 852
1da177e4
LT		 853 hci_dev_put(hdev);
854 return err;
855}
856
857int hci_dev_reset(__u16 dev)
858{
859 struct hci_dev *hdev;
860 int ret = 0;
861
70f23020
AE		 862 hdev = hci_dev_get(dev);
863 if (!hdev)
1da177e4
LT		 864 return -ENODEV;
865
866 hci_req_lock(hdev);
1da177e4
LT		 867
868 if (!test_bit(HCI_UP, &hdev->flags))
869 goto done;
870
871 /* Drop queues */
872 skb_queue_purge(&hdev->rx_q);
873 skb_queue_purge(&hdev->cmd_q);
874
09fd0de5 875 hci_dev_lock(hdev);
1da177e4
LT		 876 inquiry_cache_flush(hdev);
877 hci_conn_hash_flush(hdev);
09fd0de5 878 hci_dev_unlock(hdev);
1da177e4
LT		 879
880 if (hdev->flush)
881 hdev->flush(hdev);
882
8e87d142 883 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 884 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 885
886 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64 887 ret = __hci_request(hdev, hci_reset_req, 0,
a8c5fb1a 888 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 889
890done:
1da177e4
LT		 891 hci_req_unlock(hdev);
892 hci_dev_put(hdev);
893 return ret;
894}
895
896int hci_dev_reset_stat(__u16 dev)
897{
898 struct hci_dev *hdev;
899 int ret = 0;
900
70f23020
AE		 901 hdev = hci_dev_get(dev);
902 if (!hdev)
1da177e4
LT		 903 return -ENODEV;
904
905 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
906
907 hci_dev_put(hdev);
908
909 return ret;
910}
911
912int hci_dev_cmd(unsigned int cmd, void __user *arg)
913{
914 struct hci_dev *hdev;
915 struct hci_dev_req dr;
916 int err = 0;
917
918 if (copy_from_user(&dr, arg, sizeof(dr)))
919 return -EFAULT;
920
70f23020
AE		 921 hdev = hci_dev_get(dr.dev_id);
922 if (!hdev)
1da177e4
LT		 923 return -ENODEV;
924
925 switch (cmd) {
926 case HCISETAUTH:
04837f64 927 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
a8c5fb1a 928 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 929 break;
930
931 case HCISETENCRYPT:
932 if (!lmp_encrypt_capable(hdev)) {
933 err = -EOPNOTSUPP;
934 break;
935 }
936
937 if (!test_bit(HCI_AUTH, &hdev->flags)) {
938 /* Auth must be enabled first */
04837f64 939 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
a8c5fb1a 940 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 941 if (err)
942 break;
943 }
944
04837f64 945 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
a8c5fb1a 946 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 947 break;
948
949 case HCISETSCAN:
04837f64 950 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
a8c5fb1a 951 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 952 break;
953
1da177e4 954 case HCISETLINKPOL:
e4e8e37c 955 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
a8c5fb1a 956 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 957 break;
958
959 case HCISETLINKMODE:
e4e8e37c
MH		 960 hdev->link_mode = ((__u16) dr.dev_opt) &
961 (HCI_LM_MASTER | HCI_LM_ACCEPT);
962 break;
963
964 case HCISETPTYPE:
965 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 966 break;
967
968 case HCISETACLMTU:
e4e8e37c
MH		 969 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
970 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 971 break;
972
973 case HCISETSCOMTU:
e4e8e37c
MH		 974 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
975 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 976 break;
977
978 default:
979 err = -EINVAL;
980 break;
981 }
e4e8e37c 982
1da177e4
LT		 983 hci_dev_put(hdev);
984 return err;
985}
986
987int hci_get_dev_list(void __user *arg)
988{
8035ded4 989 struct hci_dev *hdev;
1da177e4
LT		 990 struct hci_dev_list_req *dl;
991 struct hci_dev_req *dr;
1da177e4
LT		 992 int n = 0, size, err;
993 __u16 dev_num;
994
995 if (get_user(dev_num, (__u16 __user *) arg))
996 return -EFAULT;
997
998 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
999 return -EINVAL;
1000
1001 size = sizeof(*dl) + dev_num * sizeof(*dr);
1002
70f23020
AE		 1003 dl = kzalloc(size, GFP_KERNEL);
1004 if (!dl)
1da177e4
LT		 1005 return -ENOMEM;
1006
1007 dr = dl->dev_req;
1008
f20d09d5 1009 read_lock(&hci_dev_list_lock);
8035ded4 1010 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1011 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1012 cancel_delayed_work(&hdev->power_off);
c542a06c 1013
a8b2d5c2
JH		 1014 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1015 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1016
1da177e4
LT		 1017 (dr + n)->dev_id = hdev->id;
1018 (dr + n)->dev_opt = hdev->flags;
c542a06c 1019
1da177e4
LT		 1020 if (++n >= dev_num)
1021 break;
1022 }
f20d09d5 1023 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1024
1025 dl->dev_num = n;
1026 size = sizeof(*dl) + n * sizeof(*dr);
1027
1028 err = copy_to_user(arg, dl, size);
1029 kfree(dl);
1030
1031 return err ? -EFAULT : 0;
1032}
1033
1034int hci_get_dev_info(void __user *arg)
1035{
1036 struct hci_dev *hdev;
1037 struct hci_dev_info di;
1038 int err = 0;
1039
1040 if (copy_from_user(&di, arg, sizeof(di)))
1041 return -EFAULT;
1042
70f23020
AE		 1043 hdev = hci_dev_get(di.dev_id);
1044 if (!hdev)
1da177e4
LT		 1045 return -ENODEV;
1046
a8b2d5c2 1047 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1048 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1049
a8b2d5c2
JH		 1050 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1051 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1052
1da177e4
LT		 1053 strcpy(di.name, hdev->name);
1054 di.bdaddr = hdev->bdaddr;
943da25d 1055 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1056 di.flags = hdev->flags;
1057 di.pkt_type = hdev->pkt_type;
1058 di.acl_mtu = hdev->acl_mtu;
1059 di.acl_pkts = hdev->acl_pkts;
1060 di.sco_mtu = hdev->sco_mtu;
1061 di.sco_pkts = hdev->sco_pkts;
1062 di.link_policy = hdev->link_policy;
1063 di.link_mode = hdev->link_mode;
1064
1065 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1066 memcpy(&di.features, &hdev->features, sizeof(di.features));
1067
1068 if (copy_to_user(arg, &di, sizeof(di)))
1069 err = -EFAULT;
1070
1071 hci_dev_put(hdev);
1072
1073 return err;
1074}
1075
1076/* ---- Interface to HCI drivers ---- */
1077
611b30f7
MH		 1078static int hci_rfkill_set_block(void *data, bool blocked)
1079{
1080 struct hci_dev *hdev = data;
1081
1082 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1083
1084 if (!blocked)
1085 return 0;
1086
1087 hci_dev_do_close(hdev);
1088
1089 return 0;
1090}
1091
1092static const struct rfkill_ops hci_rfkill_ops = {
1093 .set_block = hci_rfkill_set_block,
1094};
1095
ab81cbf9
JH		 1096static void hci_power_on(struct work_struct *work)
1097{
1098 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1099
1100 BT_DBG("%s", hdev->name);
1101
1102 if (hci_dev_open(hdev->id) < 0)
1103 return;
1104
a8b2d5c2 1105 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1106 schedule_delayed_work(&hdev->power_off,
a8c5fb1a 1107 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1108
a8b2d5c2 1109 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1110 mgmt_index_added(hdev);
ab81cbf9
JH		 1111}
1112
1113static void hci_power_off(struct work_struct *work)
1114{
3243553f 1115 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1116 power_off.work);
ab81cbf9
JH		 1117
1118 BT_DBG("%s", hdev->name);
1119
8ee56540 1120 hci_dev_do_close(hdev);
ab81cbf9
JH		 1121}
1122
16ab91ab
JH		 1123static void hci_discov_off(struct work_struct *work)
1124{
1125 struct hci_dev *hdev;
1126 u8 scan = SCAN_PAGE;
1127
1128 hdev = container_of(work, struct hci_dev, discov_off.work);
1129
1130 BT_DBG("%s", hdev->name);
1131
09fd0de5 1132 hci_dev_lock(hdev);
16ab91ab
JH		 1133
1134 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1135
1136 hdev->discov_timeout = 0;
1137
09fd0de5 1138 hci_dev_unlock(hdev);
16ab91ab
JH		 1139}
1140
2aeb9a1a
JH		 1141int hci_uuids_clear(struct hci_dev *hdev)
1142{
1143 struct list_head *p, *n;
1144
1145 list_for_each_safe(p, n, &hdev->uuids) {
1146 struct bt_uuid *uuid;
1147
1148 uuid = list_entry(p, struct bt_uuid, list);
1149
1150 list_del(p);
1151 kfree(uuid);
1152 }
1153
1154 return 0;
1155}
1156
55ed8ca1
JH		 1157int hci_link_keys_clear(struct hci_dev *hdev)
1158{
1159 struct list_head *p, *n;
1160
1161 list_for_each_safe(p, n, &hdev->link_keys) {
1162 struct link_key *key;
1163
1164 key = list_entry(p, struct link_key, list);
1165
1166 list_del(p);
1167 kfree(key);
1168 }
1169
1170 return 0;
1171}
1172
b899efaf
VCG		 1173int hci_smp_ltks_clear(struct hci_dev *hdev)
1174{
1175 struct smp_ltk *k, *tmp;
1176
1177 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1178 list_del(&k->list);
1179 kfree(k);
1180 }
1181
1182 return 0;
1183}
1184
55ed8ca1
JH		 1185struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1186{
8035ded4 1187 struct link_key *k;
55ed8ca1 1188
8035ded4 1189 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1190 if (bacmp(bdaddr, &k->bdaddr) == 0)
1191 return k;
55ed8ca1
JH		 1192
1193 return NULL;
1194}
1195
745c0ce3 1196static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1197 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1198{
1199 /* Legacy key */
1200 if (key_type < 0x03)
745c0ce3 1201 return true;
d25e28ab
JH		 1202
1203 /* Debug keys are insecure so don't store them persistently */
1204 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1205 return false;
d25e28ab
JH		 1206
1207 /* Changed combination key and there's no previous one */
1208 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1209 return false;
d25e28ab
JH		 1210
1211 /* Security mode 3 case */
1212 if (!conn)
745c0ce3 1213 return true;
d25e28ab
JH		 1214
1215 /* Neither local nor remote side had no-bonding as requirement */
1216 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1217 return true;
d25e28ab
JH		 1218
1219 /* Local side had dedicated bonding as requirement */
1220 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1221 return true;
d25e28ab
JH		 1222
1223 /* Remote side had dedicated bonding as requirement */
1224 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1225 return true;
d25e28ab
JH		 1226
1227 /* If none of the above criteria match, then don't store the key
1228 * persistently */
745c0ce3 1229 return false;
d25e28ab
JH		 1230}
1231
c9839a11 1232struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1233{
c9839a11 1234 struct smp_ltk *k;
75d262c2 1235
c9839a11
VCG		 1236 list_for_each_entry(k, &hdev->long_term_keys, list) {
1237 if (k->ediv != ediv ||
a8c5fb1a 1238 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1239 continue;
1240
c9839a11 1241 return k;
75d262c2
VCG		 1242 }
1243
1244 return NULL;
1245}
1246EXPORT_SYMBOL(hci_find_ltk);
1247
c9839a11 1248struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1249 u8 addr_type)
75d262c2 1250{
c9839a11 1251 struct smp_ltk *k;
75d262c2 1252
c9839a11
VCG		 1253 list_for_each_entry(k, &hdev->long_term_keys, list)
1254 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1255 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1256 return k;
1257
1258 return NULL;
1259}
c9839a11 1260EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1261
d25e28ab 1262int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1263 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1264{
1265 struct link_key *key, *old_key;
745c0ce3
VA		 1266 u8 old_key_type;
1267 bool persistent;
55ed8ca1
JH		 1268
1269 old_key = hci_find_link_key(hdev, bdaddr);
1270 if (old_key) {
1271 old_key_type = old_key->type;
1272 key = old_key;
1273 } else {
12adcf3a 1274 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1275 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1276 if (!key)
1277 return -ENOMEM;
1278 list_add(&key->list, &hdev->link_keys);
1279 }
1280
1281 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1282
d25e28ab
JH		 1283 /* Some buggy controller combinations generate a changed
1284 * combination key for legacy pairing even when there's no
1285 * previous key */
1286 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1287 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1288 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1289 if (conn)
1290 conn->key_type = type;
1291 }
d25e28ab 1292
55ed8ca1
JH		 1293 bacpy(&key->bdaddr, bdaddr);
1294 memcpy(key->val, val, 16);
55ed8ca1
JH		 1295 key->pin_len = pin_len;
1296
b6020ba0 1297 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1298 key->type = old_key_type;
4748fed2
JH		 1299 else
1300 key->type = type;
1301
4df378a1
JH		 1302 if (!new_key)
1303 return 0;
1304
1305 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1306
744cf19e 1307 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1308
6ec5bcad
VA		 1309 if (conn)
1310 conn->flush_key = !persistent;
55ed8ca1
JH		 1311
1312 return 0;
1313}
1314
c9839a11 1315int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1316 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1317 ediv, u8 rand[8])
75d262c2 1318{
c9839a11 1319 struct smp_ltk *key, *old_key;
75d262c2 1320
c9839a11
VCG		 1321 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1322 return 0;
75d262c2 1323
c9839a11
VCG		 1324 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1325 if (old_key)
75d262c2 1326 key = old_key;
c9839a11
VCG		 1327 else {
1328 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1329 if (!key)
1330 return -ENOMEM;
c9839a11 1331 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1332 }
1333
75d262c2 1334 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1335 key->bdaddr_type = addr_type;
1336 memcpy(key->val, tk, sizeof(key->val));
1337 key->authenticated = authenticated;
1338 key->ediv = ediv;
1339 key->enc_size = enc_size;
1340 key->type = type;
1341 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1342
c9839a11
VCG		 1343 if (!new_key)
1344 return 0;
75d262c2 1345
261cc5aa
VCG		 1346 if (type & HCI_SMP_LTK)
1347 mgmt_new_ltk(hdev, key, 1);
1348
75d262c2
VCG		 1349 return 0;
1350}
1351
55ed8ca1
JH		 1352int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1353{
1354 struct link_key *key;
1355
1356 key = hci_find_link_key(hdev, bdaddr);
1357 if (!key)
1358 return -ENOENT;
1359
1360 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1361
1362 list_del(&key->list);
1363 kfree(key);
1364
1365 return 0;
1366}
1367
b899efaf
VCG		 1368int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1369{
1370 struct smp_ltk *k, *tmp;
1371
1372 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1373 if (bacmp(bdaddr, &k->bdaddr))
1374 continue;
1375
1376 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1377
1378 list_del(&k->list);
1379 kfree(k);
1380 }
1381
1382 return 0;
1383}
1384
6bd32326
VT		 1385/* HCI command timer function */
1386static void hci_cmd_timer(unsigned long arg)
1387{
1388 struct hci_dev *hdev = (void *) arg;
1389
1390 BT_ERR("%s command tx timeout", hdev->name);
1391 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1392 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1393}
1394
2763eda6 1395struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1396 bdaddr_t *bdaddr)
2763eda6
SJ		 1397{
1398 struct oob_data *data;
1399
1400 list_for_each_entry(data, &hdev->remote_oob_data, list)
1401 if (bacmp(bdaddr, &data->bdaddr) == 0)
1402 return data;
1403
1404 return NULL;
1405}
1406
1407int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1408{
1409 struct oob_data *data;
1410
1411 data = hci_find_remote_oob_data(hdev, bdaddr);
1412 if (!data)
1413 return -ENOENT;
1414
1415 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1416
1417 list_del(&data->list);
1418 kfree(data);
1419
1420 return 0;
1421}
1422
1423int hci_remote_oob_data_clear(struct hci_dev *hdev)
1424{
1425 struct oob_data *data, *n;
1426
1427 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1428 list_del(&data->list);
1429 kfree(data);
1430 }
1431
1432 return 0;
1433}
1434
1435int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1436 u8 *randomizer)
2763eda6
SJ		 1437{
1438 struct oob_data *data;
1439
1440 data = hci_find_remote_oob_data(hdev, bdaddr);
1441
1442 if (!data) {
1443 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1444 if (!data)
1445 return -ENOMEM;
1446
1447 bacpy(&data->bdaddr, bdaddr);
1448 list_add(&data->list, &hdev->remote_oob_data);
1449 }
1450
1451 memcpy(data->hash, hash, sizeof(data->hash));
1452 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1453
1454 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1455
1456 return 0;
1457}
1458
04124681 1459struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1460{
8035ded4 1461 struct bdaddr_list *b;
b2a66aad 1462
8035ded4 1463 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1464 if (bacmp(bdaddr, &b->bdaddr) == 0)
1465 return b;
b2a66aad
AJ		 1466
1467 return NULL;
1468}
1469
1470int hci_blacklist_clear(struct hci_dev *hdev)
1471{
1472 struct list_head *p, *n;
1473
1474 list_for_each_safe(p, n, &hdev->blacklist) {
1475 struct bdaddr_list *b;
1476
1477 b = list_entry(p, struct bdaddr_list, list);
1478
1479 list_del(p);
1480 kfree(b);
1481 }
1482
1483 return 0;
1484}
1485
88c1fe4b 1486int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1487{
1488 struct bdaddr_list *entry;
b2a66aad
AJ		 1489
1490 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1491 return -EBADF;
1492
5e762444
AJ		 1493 if (hci_blacklist_lookup(hdev, bdaddr))
1494 return -EEXIST;
b2a66aad
AJ		 1495
1496 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1497 if (!entry)
1498 return -ENOMEM;
b2a66aad
AJ		 1499
1500 bacpy(&entry->bdaddr, bdaddr);
1501
1502 list_add(&entry->list, &hdev->blacklist);
1503
88c1fe4b 1504 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1505}
1506
88c1fe4b 1507int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1508{
1509 struct bdaddr_list *entry;
b2a66aad 1510
1ec918ce 1511 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1512 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1513
1514 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1515 if (!entry)
5e762444 1516 return -ENOENT;
b2a66aad
AJ		 1517
1518 list_del(&entry->list);
1519 kfree(entry);
1520
88c1fe4b 1521 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1522}
1523
7ba8b4be
AG		 1524static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1525{
1526 struct le_scan_params *param = (struct le_scan_params *) opt;
1527 struct hci_cp_le_set_scan_param cp;
1528
1529 memset(&cp, 0, sizeof(cp));
1530 cp.type = param->type;
1531 cp.interval = cpu_to_le16(param->interval);
1532 cp.window = cpu_to_le16(param->window);
1533
1534 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1535}
1536
1537static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1538{
1539 struct hci_cp_le_set_scan_enable cp;
1540
1541 memset(&cp, 0, sizeof(cp));
1542 cp.enable = 1;
1543
1544 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1545}
1546
1547static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1548 u16 window, int timeout)
7ba8b4be
AG		 1549{
1550 long timeo = msecs_to_jiffies(3000);
1551 struct le_scan_params param;
1552 int err;
1553
1554 BT_DBG("%s", hdev->name);
1555
1556 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1557 return -EINPROGRESS;
1558
1559 param.type = type;
1560 param.interval = interval;
1561 param.window = window;
1562
1563 hci_req_lock(hdev);
1564
1565 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1566 timeo);
7ba8b4be
AG		 1567 if (!err)
1568 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1569
1570 hci_req_unlock(hdev);
1571
1572 if (err < 0)
1573 return err;
1574
1575 schedule_delayed_work(&hdev->le_scan_disable,
04124681 1576 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1577
1578 return 0;
1579}
1580
7dbfac1d
AG		 1581int hci_cancel_le_scan(struct hci_dev *hdev)
1582{
1583 BT_DBG("%s", hdev->name);
1584
1585 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1586 return -EALREADY;
1587
1588 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1589 struct hci_cp_le_set_scan_enable cp;
1590
1591 /* Send HCI command to disable LE Scan */
1592 memset(&cp, 0, sizeof(cp));
1593 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1594 }
1595
1596 return 0;
1597}
1598
7ba8b4be
AG		 1599static void le_scan_disable_work(struct work_struct *work)
1600{
1601 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1602 le_scan_disable.work);
7ba8b4be
AG		 1603 struct hci_cp_le_set_scan_enable cp;
1604
1605 BT_DBG("%s", hdev->name);
1606
1607 memset(&cp, 0, sizeof(cp));
1608
1609 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1610}
1611
28b75a89
AG		 1612static void le_scan_work(struct work_struct *work)
1613{
1614 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1615 struct le_scan_params *param = &hdev->le_scan_params;
1616
1617 BT_DBG("%s", hdev->name);
1618
04124681
GP		 1619 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1620 param->timeout);
28b75a89
AG		 1621}
1622
1623int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1624 int timeout)
28b75a89
AG		 1625{
1626 struct le_scan_params *param = &hdev->le_scan_params;
1627
1628 BT_DBG("%s", hdev->name);
1629
1630 if (work_busy(&hdev->le_scan))
1631 return -EINPROGRESS;
1632
1633 param->type = type;
1634 param->interval = interval;
1635 param->window = window;
1636 param->timeout = timeout;
1637
1638 queue_work(system_long_wq, &hdev->le_scan);
1639
1640 return 0;
1641}
1642
9be0dab7
DH		 1643/* Alloc HCI device */
1644struct hci_dev *hci_alloc_dev(void)
1645{
1646 struct hci_dev *hdev;
1647
1648 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1649 if (!hdev)
1650 return NULL;
1651
b1b813d4
DH		 1652 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1653 hdev->esco_type = (ESCO_HV1);
1654 hdev->link_mode = (HCI_LM_ACCEPT);
1655 hdev->io_capability = 0x03; /* No Input No Output */
1656
b1b813d4
DH		 1657 hdev->sniff_max_interval = 800;
1658 hdev->sniff_min_interval = 80;
1659
1660 mutex_init(&hdev->lock);
1661 mutex_init(&hdev->req_lock);
1662
1663 INIT_LIST_HEAD(&hdev->mgmt_pending);
1664 INIT_LIST_HEAD(&hdev->blacklist);
1665 INIT_LIST_HEAD(&hdev->uuids);
1666 INIT_LIST_HEAD(&hdev->link_keys);
1667 INIT_LIST_HEAD(&hdev->long_term_keys);
1668 INIT_LIST_HEAD(&hdev->remote_oob_data);
b1b813d4
DH		 1669
1670 INIT_WORK(&hdev->rx_work, hci_rx_work);
1671 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1672 INIT_WORK(&hdev->tx_work, hci_tx_work);
1673 INIT_WORK(&hdev->power_on, hci_power_on);
1674 INIT_WORK(&hdev->le_scan, le_scan_work);
1675
b1b813d4
DH		 1676 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1677 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1678 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1679
9be0dab7 1680 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 1681 skb_queue_head_init(&hdev->rx_q);
1682 skb_queue_head_init(&hdev->cmd_q);
1683 skb_queue_head_init(&hdev->raw_q);
1684
1685 init_waitqueue_head(&hdev->req_wait_q);
1686
1687 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1688
b1b813d4
DH		 1689 hci_init_sysfs(hdev);
1690 discovery_init(hdev);
1691 hci_conn_hash_init(hdev);
9be0dab7
DH		 1692
1693 return hdev;
1694}
1695EXPORT_SYMBOL(hci_alloc_dev);
1696
1697/* Free HCI device */
1698void hci_free_dev(struct hci_dev *hdev)
1699{
1700 skb_queue_purge(&hdev->driver_init);
1701
1702 /* will free via device release */
1703 put_device(&hdev->dev);
1704}
1705EXPORT_SYMBOL(hci_free_dev);
1706
1da177e4
LT		 1707/* Register HCI device */
1708int hci_register_dev(struct hci_dev *hdev)
1709{
fc50744c 1710 struct list_head *head, *p;
b1b813d4 1711 int id, error;
1da177e4 1712
010666a1 1713 if (!hdev->open || !hdev->close)
1da177e4
LT		 1714 return -EINVAL;
1715
fc50744c
UF		 1716 write_lock(&hci_dev_list_lock);
1717
08add513
MM		 1718 /* Do not allow HCI_AMP devices to register at index 0,
1719 * so the index can be used as the AMP controller ID.
1720 */
1721 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
fc50744c 1722 head = &hci_dev_list;
1da177e4
LT		 1723
1724 /* Find first available device id */
1725 list_for_each(p, &hci_dev_list) {
fc50744c
UF		 1726 int nid = list_entry(p, struct hci_dev, list)->id;
1727 if (nid > id)
1da177e4 1728 break;
fc50744c
UF		 1729 if (nid == id)
1730 id++;
1731 head = p;
1da177e4 1732 }
8e87d142 1733
1da177e4
LT		 1734 sprintf(hdev->name, "hci%d", id);
1735 hdev->id = id;
2d8b3a11
AE		 1736
1737 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1738
fc50744c 1739 list_add(&hdev->list, head);
1da177e4 1740
f20d09d5 1741 write_unlock(&hci_dev_list_lock);
1da177e4 1742
32845eb1 1743 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 1744 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1745 if (!hdev->workqueue) {
1746 error = -ENOMEM;
1747 goto err;
1748 }
f48fd9c8 1749
33ca954d
DH		 1750 error = hci_add_sysfs(hdev);
1751 if (error < 0)
1752 goto err_wqueue;
1da177e4 1753
611b30f7 1754 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 1755 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1756 hdev);
611b30f7
MH		 1757 if (hdev->rfkill) {
1758 if (rfkill_register(hdev->rfkill) < 0) {
1759 rfkill_destroy(hdev->rfkill);
1760 hdev->rfkill = NULL;
1761 }
1762 }
1763
a8b2d5c2
JH		 1764 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1765 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1766 schedule_work(&hdev->power_on);
ab81cbf9 1767
1da177e4 1768 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1769 hci_dev_hold(hdev);
1da177e4
LT		 1770
1771 return id;
f48fd9c8 1772
33ca954d
DH		 1773err_wqueue:
1774 destroy_workqueue(hdev->workqueue);
1775err:
f20d09d5 1776 write_lock(&hci_dev_list_lock);
f48fd9c8 1777 list_del(&hdev->list);
f20d09d5 1778 write_unlock(&hci_dev_list_lock);
f48fd9c8 1779
33ca954d 1780 return error;
1da177e4
LT		 1781}
1782EXPORT_SYMBOL(hci_register_dev);
1783
1784/* Unregister HCI device */
59735631 1785void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1786{
ef222013
MH		 1787 int i;
1788
c13854ce 1789 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1790
94324962
JH		 1791 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1792
f20d09d5 1793 write_lock(&hci_dev_list_lock);
1da177e4 1794 list_del(&hdev->list);
f20d09d5 1795 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1796
1797 hci_dev_do_close(hdev);
1798
cd4c5391 1799 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1800 kfree_skb(hdev->reassembly[i]);
1801
ab81cbf9 1802 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 1803 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1804 hci_dev_lock(hdev);
744cf19e 1805 mgmt_index_removed(hdev);
09fd0de5 1806 hci_dev_unlock(hdev);
56e5cb86 1807 }
ab81cbf9 1808
2e58ef3e
JH		 1809 /* mgmt_index_removed should take care of emptying the
1810 * pending list */
1811 BUG_ON(!list_empty(&hdev->mgmt_pending));
1812
1da177e4
LT		 1813 hci_notify(hdev, HCI_DEV_UNREG);
1814
611b30f7
MH		 1815 if (hdev->rfkill) {
1816 rfkill_unregister(hdev->rfkill);
1817 rfkill_destroy(hdev->rfkill);
1818 }
1819
ce242970 1820 hci_del_sysfs(hdev);
147e2d59 1821
f48fd9c8
MH		 1822 destroy_workqueue(hdev->workqueue);
1823
09fd0de5 1824 hci_dev_lock(hdev);
e2e0cacb 1825 hci_blacklist_clear(hdev);
2aeb9a1a 1826 hci_uuids_clear(hdev);
55ed8ca1 1827 hci_link_keys_clear(hdev);
b899efaf 1828 hci_smp_ltks_clear(hdev);
2763eda6 1829 hci_remote_oob_data_clear(hdev);
09fd0de5 1830 hci_dev_unlock(hdev);
e2e0cacb 1831
dc946bd8 1832 hci_dev_put(hdev);
1da177e4
LT		 1833}
1834EXPORT_SYMBOL(hci_unregister_dev);
1835
1836/* Suspend HCI device */
1837int hci_suspend_dev(struct hci_dev *hdev)
1838{
1839 hci_notify(hdev, HCI_DEV_SUSPEND);
1840 return 0;
1841}
1842EXPORT_SYMBOL(hci_suspend_dev);
1843
1844/* Resume HCI device */
1845int hci_resume_dev(struct hci_dev *hdev)
1846{
1847 hci_notify(hdev, HCI_DEV_RESUME);
1848 return 0;
1849}
1850EXPORT_SYMBOL(hci_resume_dev);
1851
76bca880
MH		 1852/* Receive frame from HCI drivers */
1853int hci_recv_frame(struct sk_buff *skb)
1854{
1855 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1856 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 1857 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 1858 kfree_skb(skb);
1859 return -ENXIO;
1860 }
1861
1862 /* Incomming skb */
1863 bt_cb(skb)->incoming = 1;
1864
1865 /* Time stamp */
1866 __net_timestamp(skb);
1867
76bca880 1868 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1869 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1870
76bca880
MH		 1871 return 0;
1872}
1873EXPORT_SYMBOL(hci_recv_frame);
1874
33e882a5 1875static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 1876 int count, __u8 index)
33e882a5
SS		 1877{
1878 int len = 0;
1879 int hlen = 0;
1880 int remain = count;
1881 struct sk_buff *skb;
1882 struct bt_skb_cb *scb;
1883
1884 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 1885 index >= NUM_REASSEMBLY)
33e882a5
SS		 1886 return -EILSEQ;
1887
1888 skb = hdev->reassembly[index];
1889
1890 if (!skb) {
1891 switch (type) {
1892 case HCI_ACLDATA_PKT:
1893 len = HCI_MAX_FRAME_SIZE;
1894 hlen = HCI_ACL_HDR_SIZE;
1895 break;
1896 case HCI_EVENT_PKT:
1897 len = HCI_MAX_EVENT_SIZE;
1898 hlen = HCI_EVENT_HDR_SIZE;
1899 break;
1900 case HCI_SCODATA_PKT:
1901 len = HCI_MAX_SCO_SIZE;
1902 hlen = HCI_SCO_HDR_SIZE;
1903 break;
1904 }
1905
1e429f38 1906 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1907 if (!skb)
1908 return -ENOMEM;
1909
1910 scb = (void *) skb->cb;
1911 scb->expect = hlen;
1912 scb->pkt_type = type;
1913
1914 skb->dev = (void *) hdev;
1915 hdev->reassembly[index] = skb;
1916 }
1917
1918 while (count) {
1919 scb = (void *) skb->cb;
89bb46d0 1920 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1921
1922 memcpy(skb_put(skb, len), data, len);
1923
1924 count -= len;
1925 data += len;
1926 scb->expect -= len;
1927 remain = count;
1928
1929 switch (type) {
1930 case HCI_EVENT_PKT:
1931 if (skb->len == HCI_EVENT_HDR_SIZE) {
1932 struct hci_event_hdr *h = hci_event_hdr(skb);
1933 scb->expect = h->plen;
1934
1935 if (skb_tailroom(skb) < scb->expect) {
1936 kfree_skb(skb);
1937 hdev->reassembly[index] = NULL;
1938 return -ENOMEM;
1939 }
1940 }
1941 break;
1942
1943 case HCI_ACLDATA_PKT:
1944 if (skb->len == HCI_ACL_HDR_SIZE) {
1945 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1946 scb->expect = __le16_to_cpu(h->dlen);
1947
1948 if (skb_tailroom(skb) < scb->expect) {
1949 kfree_skb(skb);
1950 hdev->reassembly[index] = NULL;
1951 return -ENOMEM;
1952 }
1953 }
1954 break;
1955
1956 case HCI_SCODATA_PKT:
1957 if (skb->len == HCI_SCO_HDR_SIZE) {
1958 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1959 scb->expect = h->dlen;
1960
1961 if (skb_tailroom(skb) < scb->expect) {
1962 kfree_skb(skb);
1963 hdev->reassembly[index] = NULL;
1964 return -ENOMEM;
1965 }
1966 }
1967 break;
1968 }
1969
1970 if (scb->expect == 0) {
1971 /* Complete frame */
1972
1973 bt_cb(skb)->pkt_type = type;
1974 hci_recv_frame(skb);
1975
1976 hdev->reassembly[index] = NULL;
1977 return remain;
1978 }
1979 }
1980
1981 return remain;
1982}
1983
ef222013
MH		 1984int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1985{
f39a3c06
SS		 1986 int rem = 0;
1987
ef222013
MH		 1988 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1989 return -EILSEQ;
1990
da5f6c37 1991 while (count) {
1e429f38 1992 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1993 if (rem < 0)
1994 return rem;
ef222013 1995
f39a3c06
SS		 1996 data += (count - rem);
1997 count = rem;
f81c6224 1998 }
ef222013 1999
f39a3c06 2000 return rem;
ef222013
MH		 2001}
2002EXPORT_SYMBOL(hci_recv_fragment);
2003
99811510
SS		 2004#define STREAM_REASSEMBLY 0
2005
2006int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2007{
2008 int type;
2009 int rem = 0;
2010
da5f6c37 2011 while (count) {
99811510
SS		 2012 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2013
2014 if (!skb) {
2015 struct { char type; } *pkt;
2016
2017 /* Start of the frame */
2018 pkt = data;
2019 type = pkt->type;
2020
2021 data++;
2022 count--;
2023 } else
2024 type = bt_cb(skb)->pkt_type;
2025
1e429f38 2026 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2027 STREAM_REASSEMBLY);
99811510
SS		 2028 if (rem < 0)
2029 return rem;
2030
2031 data += (count - rem);
2032 count = rem;
f81c6224 2033 }
99811510
SS		 2034
2035 return rem;
2036}
2037EXPORT_SYMBOL(hci_recv_stream_fragment);
2038
1da177e4
LT		 2039/* ---- Interface to upper protocols ---- */
2040
1da177e4
LT		 2041int hci_register_cb(struct hci_cb *cb)
2042{
2043 BT_DBG("%p name %s", cb, cb->name);
2044
f20d09d5 2045 write_lock(&hci_cb_list_lock);
1da177e4 2046 list_add(&cb->list, &hci_cb_list);
f20d09d5 2047 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2048
2049 return 0;
2050}
2051EXPORT_SYMBOL(hci_register_cb);
2052
2053int hci_unregister_cb(struct hci_cb *cb)
2054{
2055 BT_DBG("%p name %s", cb, cb->name);
2056
f20d09d5 2057 write_lock(&hci_cb_list_lock);
1da177e4 2058 list_del(&cb->list);
f20d09d5 2059 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2060
2061 return 0;
2062}
2063EXPORT_SYMBOL(hci_unregister_cb);
2064
2065static int hci_send_frame(struct sk_buff *skb)
2066{
2067 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2068
2069 if (!hdev) {
2070 kfree_skb(skb);
2071 return -ENODEV;
2072 }
2073
0d48d939 2074 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2075
cd82e61c
MH		 2076 /* Time stamp */
2077 __net_timestamp(skb);
1da177e4 2078
cd82e61c
MH		 2079 /* Send copy to monitor */
2080 hci_send_to_monitor(hdev, skb);
2081
2082 if (atomic_read(&hdev->promisc)) {
2083 /* Send copy to the sockets */
470fe1b5 2084 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2085 }
2086
2087 /* Get rid of skb owner, prior to sending to the driver. */
2088 skb_orphan(skb);
2089
2090 return hdev->send(skb);
2091}
2092
2093/* Send HCI command */
a9de9248 2094int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2095{
2096 int len = HCI_COMMAND_HDR_SIZE + plen;
2097 struct hci_command_hdr *hdr;
2098 struct sk_buff *skb;
2099
a9de9248 2100 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2101
2102 skb = bt_skb_alloc(len, GFP_ATOMIC);
2103 if (!skb) {
ef222013 2104 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2105 return -ENOMEM;
2106 }
2107
2108 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2109 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2110 hdr->plen = plen;
2111
2112 if (plen)
2113 memcpy(skb_put(skb, plen), param, plen);
2114
2115 BT_DBG("skb len %d", skb->len);
2116
0d48d939 2117 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2118 skb->dev = (void *) hdev;
c78ae283 2119
a5040efa
JH		 2120 if (test_bit(HCI_INIT, &hdev->flags))
2121 hdev->init_last_cmd = opcode;
2122
1da177e4 2123 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2124 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2125
2126 return 0;
2127}
1da177e4
LT		 2128
2129/* Get data from the previously sent command */
a9de9248 2130void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2131{
2132 struct hci_command_hdr *hdr;
2133
2134 if (!hdev->sent_cmd)
2135 return NULL;
2136
2137 hdr = (void *) hdev->sent_cmd->data;
2138
a9de9248 2139 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2140 return NULL;
2141
a9de9248 2142 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2143
2144 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2145}
2146
2147/* Send ACL data */
2148static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2149{
2150 struct hci_acl_hdr *hdr;
2151 int len = skb->len;
2152
badff6d0
ACM		 2153 skb_push(skb, HCI_ACL_HDR_SIZE);
2154 skb_reset_transport_header(skb);
9c70220b 2155 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2156 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2157 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2158}
2159
73d80deb 2160static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
a8c5fb1a 2161 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2162{
2163 struct hci_dev *hdev = conn->hdev;
2164 struct sk_buff *list;
2165
087bfd99
GP		 2166 skb->len = skb_headlen(skb);
2167 skb->data_len = 0;
2168
2169 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2170 hci_add_acl_hdr(skb, conn->handle, flags);
2171
70f23020
AE		 2172 list = skb_shinfo(skb)->frag_list;
2173 if (!list) {
1da177e4
LT		 2174 /* Non fragmented */
2175 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2176
73d80deb 2177 skb_queue_tail(queue, skb);
1da177e4
LT		 2178 } else {
2179 /* Fragmented */
2180 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2181
2182 skb_shinfo(skb)->frag_list = NULL;
2183
2184 /* Queue all fragments atomically */
af3e6359 2185 spin_lock(&queue->lock);
1da177e4 2186
73d80deb 2187 __skb_queue_tail(queue, skb);
e702112f
AE		 2188
2189 flags &= ~ACL_START;
2190 flags |= ACL_CONT;
1da177e4
LT		 2191 do {
2192 skb = list; list = list->next;
8e87d142 2193
1da177e4 2194 skb->dev = (void *) hdev;
0d48d939 2195 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2196 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2197
2198 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2199
73d80deb 2200 __skb_queue_tail(queue, skb);
1da177e4
LT		 2201 } while (list);
2202
af3e6359 2203 spin_unlock(&queue->lock);
1da177e4 2204 }
73d80deb
LAD		 2205}
2206
2207void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2208{
2209 struct hci_conn *conn = chan->conn;
2210 struct hci_dev *hdev = conn->hdev;
2211
2212 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2213
2214 skb->dev = (void *) hdev;
73d80deb
LAD		 2215
2216 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2217
3eff45ea 2218 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2219}
2220EXPORT_SYMBOL(hci_send_acl);
2221
2222/* Send SCO data */
0d861d8b 2223void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2224{
2225 struct hci_dev *hdev = conn->hdev;
2226 struct hci_sco_hdr hdr;
2227
2228 BT_DBG("%s len %d", hdev->name, skb->len);
2229
aca3192c 2230 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2231 hdr.dlen = skb->len;
2232
badff6d0
ACM		 2233 skb_push(skb, HCI_SCO_HDR_SIZE);
2234 skb_reset_transport_header(skb);
9c70220b 2235 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2236
2237 skb->dev = (void *) hdev;
0d48d939 2238 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2239
1da177e4 2240 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2241 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2242}
2243EXPORT_SYMBOL(hci_send_sco);
2244
2245/* ---- HCI TX task (outgoing data) ---- */
2246
2247/* HCI Connection scheduler */
a8c5fb1a
GP		 2248static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2249 int *quote)
1da177e4
LT		 2250{
2251 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2252 struct hci_conn *conn = NULL, *c;
abc5de8f 2253 unsigned int num = 0, min = ~0;
1da177e4 2254
8e87d142 2255 /* We don't have to lock device here. Connections are always
1da177e4 2256 * added and removed with TX task disabled. */
bf4c6325
GP		 2257
2258 rcu_read_lock();
2259
2260 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2261 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2262 continue;
769be974
MH		 2263
2264 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2265 continue;
2266
1da177e4
LT		 2267 num++;
2268
2269 if (c->sent < min) {
2270 min = c->sent;
2271 conn = c;
2272 }
52087a79
LAD		 2273
2274 if (hci_conn_num(hdev, type) == num)
2275 break;
1da177e4
LT		 2276 }
2277
bf4c6325
GP		 2278 rcu_read_unlock();
2279
1da177e4 2280 if (conn) {
6ed58ec5
VT		 2281 int cnt, q;
2282
2283 switch (conn->type) {
2284 case ACL_LINK:
2285 cnt = hdev->acl_cnt;
2286 break;
2287 case SCO_LINK:
2288 case ESCO_LINK:
2289 cnt = hdev->sco_cnt;
2290 break;
2291 case LE_LINK:
2292 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2293 break;
2294 default:
2295 cnt = 0;
2296 BT_ERR("Unknown link type");
2297 }
2298
2299 q = cnt / num;
1da177e4
LT		 2300 *quote = q ? q : 1;
2301 } else
2302 *quote = 0;
2303
2304 BT_DBG("conn %p quote %d", conn, *quote);
2305 return conn;
2306}
2307
bae1f5d9 2308static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2309{
2310 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2311 struct hci_conn *c;
1da177e4 2312
bae1f5d9 2313 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2314
bf4c6325
GP		 2315 rcu_read_lock();
2316
1da177e4 2317 /* Kill stalled connections */
bf4c6325 2318 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2319 if (c->type == type && c->sent) {
2320 BT_ERR("%s killing stalled connection %s",
a8c5fb1a 2321 hdev->name, batostr(&c->dst));
1da177e4
LT		 2322 hci_acl_disconn(c, 0x13);
2323 }
2324 }
bf4c6325
GP		 2325
2326 rcu_read_unlock();
1da177e4
LT		 2327}
2328
73d80deb 2329static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
a8c5fb1a 2330 int *quote)
1da177e4 2331{
73d80deb
LAD		 2332 struct hci_conn_hash *h = &hdev->conn_hash;
2333 struct hci_chan *chan = NULL;
abc5de8f 2334 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2335 struct hci_conn *conn;
73d80deb
LAD		 2336 int cnt, q, conn_num = 0;
2337
2338 BT_DBG("%s", hdev->name);
2339
bf4c6325
GP		 2340 rcu_read_lock();
2341
2342 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2343 struct hci_chan *tmp;
2344
2345 if (conn->type != type)
2346 continue;
2347
2348 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2349 continue;
2350
2351 conn_num++;
2352
8192edef 2353 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2354 struct sk_buff *skb;
2355
2356 if (skb_queue_empty(&tmp->data_q))
2357 continue;
2358
2359 skb = skb_peek(&tmp->data_q);
2360 if (skb->priority < cur_prio)
2361 continue;
2362
2363 if (skb->priority > cur_prio) {
2364 num = 0;
2365 min = ~0;
2366 cur_prio = skb->priority;
2367 }
2368
2369 num++;
2370
2371 if (conn->sent < min) {
2372 min = conn->sent;
2373 chan = tmp;
2374 }
2375 }
2376
2377 if (hci_conn_num(hdev, type) == conn_num)
2378 break;
2379 }
2380
bf4c6325
GP		 2381 rcu_read_unlock();
2382
73d80deb
LAD		 2383 if (!chan)
2384 return NULL;
2385
2386 switch (chan->conn->type) {
2387 case ACL_LINK:
2388 cnt = hdev->acl_cnt;
2389 break;
2390 case SCO_LINK:
2391 case ESCO_LINK:
2392 cnt = hdev->sco_cnt;
2393 break;
2394 case LE_LINK:
2395 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2396 break;
2397 default:
2398 cnt = 0;
2399 BT_ERR("Unknown link type");
2400 }
2401
2402 q = cnt / num;
2403 *quote = q ? q : 1;
2404 BT_DBG("chan %p quote %d", chan, *quote);
2405 return chan;
2406}
2407
02b20f0b
LAD		 2408static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2409{
2410 struct hci_conn_hash *h = &hdev->conn_hash;
2411 struct hci_conn *conn;
2412 int num = 0;
2413
2414 BT_DBG("%s", hdev->name);
2415
bf4c6325
GP		 2416 rcu_read_lock();
2417
2418 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2419 struct hci_chan *chan;
2420
2421 if (conn->type != type)
2422 continue;
2423
2424 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2425 continue;
2426
2427 num++;
2428
8192edef 2429 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2430 struct sk_buff *skb;
2431
2432 if (chan->sent) {
2433 chan->sent = 0;
2434 continue;
2435 }
2436
2437 if (skb_queue_empty(&chan->data_q))
2438 continue;
2439
2440 skb = skb_peek(&chan->data_q);
2441 if (skb->priority >= HCI_PRIO_MAX - 1)
2442 continue;
2443
2444 skb->priority = HCI_PRIO_MAX - 1;
2445
2446 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2447 skb->priority);
02b20f0b
LAD		 2448 }
2449
2450 if (hci_conn_num(hdev, type) == num)
2451 break;
2452 }
bf4c6325
GP		 2453
2454 rcu_read_unlock();
2455
02b20f0b
LAD		 2456}
2457
b71d385a
AE		 2458static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2459{
2460 /* Calculate count of blocks used by this packet */
2461 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2462}
2463
63d2bc1b 2464static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2465{
1da177e4
LT		 2466 if (!test_bit(HCI_RAW, &hdev->flags)) {
2467 /* ACL tx timeout must be longer than maximum
2468 * link supervision timeout (40.9 seconds) */
63d2bc1b 2469 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
a8c5fb1a 2470 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2471 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2472 }
63d2bc1b 2473}
1da177e4 2474
63d2bc1b
AE		 2475static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2476{
2477 unsigned int cnt = hdev->acl_cnt;
2478 struct hci_chan *chan;
2479 struct sk_buff *skb;
2480 int quote;
2481
2482 __check_timeout(hdev, cnt);
04837f64 2483
73d80deb 2484 while (hdev->acl_cnt &&
a8c5fb1a 2485 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2486 u32 priority = (skb_peek(&chan->data_q))->priority;
2487 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2488 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2489 skb->len, skb->priority);
73d80deb 2490
ec1cce24
LAD		 2491 /* Stop if priority has changed */
2492 if (skb->priority < priority)
2493 break;
2494
2495 skb = skb_dequeue(&chan->data_q);
2496
73d80deb 2497 hci_conn_enter_active_mode(chan->conn,
04124681 2498 bt_cb(skb)->force_active);
04837f64 2499
1da177e4
LT		 2500 hci_send_frame(skb);
2501 hdev->acl_last_tx = jiffies;
2502
2503 hdev->acl_cnt--;
73d80deb
LAD		 2504 chan->sent++;
2505 chan->conn->sent++;
1da177e4
LT		 2506 }
2507 }
02b20f0b
LAD		 2508
2509 if (cnt != hdev->acl_cnt)
2510 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2511}
2512
b71d385a
AE		 2513static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2514{
63d2bc1b 2515 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2516 struct hci_chan *chan;
2517 struct sk_buff *skb;
2518 int quote;
b71d385a 2519
63d2bc1b 2520 __check_timeout(hdev, cnt);
b71d385a
AE		 2521
2522 while (hdev->block_cnt > 0 &&
a8c5fb1a 2523 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
b71d385a
AE		 2524 u32 priority = (skb_peek(&chan->data_q))->priority;
2525 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2526 int blocks;
2527
2528 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2529 skb->len, skb->priority);
b71d385a
AE		 2530
2531 /* Stop if priority has changed */
2532 if (skb->priority < priority)
2533 break;
2534
2535 skb = skb_dequeue(&chan->data_q);
2536
2537 blocks = __get_blocks(hdev, skb);
2538 if (blocks > hdev->block_cnt)
2539 return;
2540
2541 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2542 bt_cb(skb)->force_active);
b71d385a
AE		 2543
2544 hci_send_frame(skb);
2545 hdev->acl_last_tx = jiffies;
2546
2547 hdev->block_cnt -= blocks;
2548 quote -= blocks;
2549
2550 chan->sent += blocks;
2551 chan->conn->sent += blocks;
2552 }
2553 }
2554
2555 if (cnt != hdev->block_cnt)
2556 hci_prio_recalculate(hdev, ACL_LINK);
2557}
2558
2559static inline void hci_sched_acl(struct hci_dev *hdev)
2560{
2561 BT_DBG("%s", hdev->name);
2562
2563 if (!hci_conn_num(hdev, ACL_LINK))
2564 return;
2565
2566 switch (hdev->flow_ctl_mode) {
2567 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2568 hci_sched_acl_pkt(hdev);
2569 break;
2570
2571 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2572 hci_sched_acl_blk(hdev);
2573 break;
2574 }
2575}
2576
1da177e4
LT		 2577/* Schedule SCO */
2578static inline void hci_sched_sco(struct hci_dev *hdev)
2579{
2580 struct hci_conn *conn;
2581 struct sk_buff *skb;
2582 int quote;
2583
2584 BT_DBG("%s", hdev->name);
2585
52087a79
LAD		 2586 if (!hci_conn_num(hdev, SCO_LINK))
2587 return;
2588
1da177e4
LT		 2589 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2590 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2591 BT_DBG("skb %p len %d", skb, skb->len);
2592 hci_send_frame(skb);
2593
2594 conn->sent++;
2595 if (conn->sent == ~0)
2596 conn->sent = 0;
2597 }
2598 }
2599}
2600
b6a0dc82
MH		 2601static inline void hci_sched_esco(struct hci_dev *hdev)
2602{
2603 struct hci_conn *conn;
2604 struct sk_buff *skb;
2605 int quote;
2606
2607 BT_DBG("%s", hdev->name);
2608
52087a79
LAD		 2609 if (!hci_conn_num(hdev, ESCO_LINK))
2610 return;
2611
b6a0dc82
MH		 2612 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2613 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2614 BT_DBG("skb %p len %d", skb, skb->len);
2615 hci_send_frame(skb);
2616
2617 conn->sent++;
2618 if (conn->sent == ~0)
2619 conn->sent = 0;
2620 }
2621 }
2622}
2623
6ed58ec5
VT		 2624static inline void hci_sched_le(struct hci_dev *hdev)
2625{
73d80deb 2626 struct hci_chan *chan;
6ed58ec5 2627 struct sk_buff *skb;
02b20f0b 2628 int quote, cnt, tmp;
6ed58ec5
VT		 2629
2630 BT_DBG("%s", hdev->name);
2631
52087a79
LAD		 2632 if (!hci_conn_num(hdev, LE_LINK))
2633 return;
2634
6ed58ec5
VT		 2635 if (!test_bit(HCI_RAW, &hdev->flags)) {
2636 /* LE tx timeout must be longer than maximum
2637 * link supervision timeout (40.9 seconds) */
bae1f5d9 2638 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 2639 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2640 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2641 }
2642
2643 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2644 tmp = cnt;
73d80deb 2645 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2646 u32 priority = (skb_peek(&chan->data_q))->priority;
2647 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2648 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2649 skb->len, skb->priority);
6ed58ec5 2650
ec1cce24
LAD		 2651 /* Stop if priority has changed */
2652 if (skb->priority < priority)
2653 break;
2654
2655 skb = skb_dequeue(&chan->data_q);
2656
6ed58ec5
VT		 2657 hci_send_frame(skb);
2658 hdev->le_last_tx = jiffies;
2659
2660 cnt--;
73d80deb
LAD		 2661 chan->sent++;
2662 chan->conn->sent++;
6ed58ec5
VT		 2663 }
2664 }
73d80deb 2665
6ed58ec5
VT		 2666 if (hdev->le_pkts)
2667 hdev->le_cnt = cnt;
2668 else
2669 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2670
2671 if (cnt != tmp)
2672 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2673}
2674
3eff45ea 2675static void hci_tx_work(struct work_struct *work)
1da177e4 2676{
3eff45ea 2677 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2678 struct sk_buff *skb;
2679
6ed58ec5 2680 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 2681 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2682
2683 /* Schedule queues and send stuff to HCI driver */
2684
2685 hci_sched_acl(hdev);
2686
2687 hci_sched_sco(hdev);
2688
b6a0dc82
MH		 2689 hci_sched_esco(hdev);
2690
6ed58ec5
VT		 2691 hci_sched_le(hdev);
2692
1da177e4
LT		 2693 /* Send next queued raw (unknown type) packet */
2694 while ((skb = skb_dequeue(&hdev->raw_q)))
2695 hci_send_frame(skb);
1da177e4
LT		 2696}
2697
25985edc 2698/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2699
2700/* ACL data packet */
2701static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2702{
2703 struct hci_acl_hdr *hdr = (void *) skb->data;
2704 struct hci_conn *conn;
2705 __u16 handle, flags;
2706
2707 skb_pull(skb, HCI_ACL_HDR_SIZE);
2708
2709 handle = __le16_to_cpu(hdr->handle);
2710 flags = hci_flags(handle);
2711 handle = hci_handle(handle);
2712
a8c5fb1a
GP		 2713 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len,
2714 handle, flags);
1da177e4
LT		 2715
2716 hdev->stat.acl_rx++;
2717
2718 hci_dev_lock(hdev);
2719 conn = hci_conn_hash_lookup_handle(hdev, handle);
2720 hci_dev_unlock(hdev);
8e87d142 2721
1da177e4 2722 if (conn) {
65983fc7 2723 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2724
671267bf
JH		 2725 hci_dev_lock(hdev);
2726 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2727 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2728 mgmt_device_connected(hdev, &conn->dst, conn->type,
2729 conn->dst_type, 0, NULL, 0,
2730 conn->dev_class);
2731 hci_dev_unlock(hdev);
2732
1da177e4 2733 /* Send to upper protocol */
686ebf28
UF		 2734 l2cap_recv_acldata(conn, skb, flags);
2735 return;
1da177e4 2736 } else {
8e87d142 2737 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 2738 hdev->name, handle);
1da177e4
LT		 2739 }
2740
2741 kfree_skb(skb);
2742}
2743
2744/* SCO data packet */
2745static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2746{
2747 struct hci_sco_hdr *hdr = (void *) skb->data;
2748 struct hci_conn *conn;
2749 __u16 handle;
2750
2751 skb_pull(skb, HCI_SCO_HDR_SIZE);
2752
2753 handle = __le16_to_cpu(hdr->handle);
2754
2755 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2756
2757 hdev->stat.sco_rx++;
2758
2759 hci_dev_lock(hdev);
2760 conn = hci_conn_hash_lookup_handle(hdev, handle);
2761 hci_dev_unlock(hdev);
2762
2763 if (conn) {
1da177e4 2764 /* Send to upper protocol */
686ebf28
UF		 2765 sco_recv_scodata(conn, skb);
2766 return;
1da177e4 2767 } else {
8e87d142 2768 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 2769 hdev->name, handle);
1da177e4
LT		 2770 }
2771
2772 kfree_skb(skb);
2773}
2774
b78752cc 2775static void hci_rx_work(struct work_struct *work)
1da177e4 2776{
b78752cc 2777 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2778 struct sk_buff *skb;
2779
2780 BT_DBG("%s", hdev->name);
2781
1da177e4 2782 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2783 /* Send copy to monitor */
2784 hci_send_to_monitor(hdev, skb);
2785
1da177e4
LT		 2786 if (atomic_read(&hdev->promisc)) {
2787 /* Send copy to the sockets */
470fe1b5 2788 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2789 }
2790
2791 if (test_bit(HCI_RAW, &hdev->flags)) {
2792 kfree_skb(skb);
2793 continue;
2794 }
2795
2796 if (test_bit(HCI_INIT, &hdev->flags)) {
2797 /* Don't process data packets in this states. */
0d48d939 2798 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2799 case HCI_ACLDATA_PKT:
2800 case HCI_SCODATA_PKT:
2801 kfree_skb(skb);
2802 continue;
3ff50b79 2803 }
1da177e4
LT		 2804 }
2805
2806 /* Process frame */
0d48d939 2807 switch (bt_cb(skb)->pkt_type) {
1da177e4 2808 case HCI_EVENT_PKT:
b78752cc 2809 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2810 hci_event_packet(hdev, skb);
2811 break;
2812
2813 case HCI_ACLDATA_PKT:
2814 BT_DBG("%s ACL data packet", hdev->name);
2815 hci_acldata_packet(hdev, skb);
2816 break;
2817
2818 case HCI_SCODATA_PKT:
2819 BT_DBG("%s SCO data packet", hdev->name);
2820 hci_scodata_packet(hdev, skb);
2821 break;
2822
2823 default:
2824 kfree_skb(skb);
2825 break;
2826 }
2827 }
1da177e4
LT		 2828}
2829
c347b765 2830static void hci_cmd_work(struct work_struct *work)
1da177e4 2831{
c347b765 2832 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2833 struct sk_buff *skb;
2834
2835 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2836
1da177e4 2837 /* Send queued commands */
5a08ecce
AE		 2838 if (atomic_read(&hdev->cmd_cnt)) {
2839 skb = skb_dequeue(&hdev->cmd_q);
2840 if (!skb)
2841 return;
2842
7585b97a 2843 kfree_skb(hdev->sent_cmd);
1da177e4 2844
70f23020
AE		 2845 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2846 if (hdev->sent_cmd) {
1da177e4
LT		 2847 atomic_dec(&hdev->cmd_cnt);
2848 hci_send_frame(skb);
7bdb8a5c
SJ		 2849 if (test_bit(HCI_RESET, &hdev->flags))
2850 del_timer(&hdev->cmd_timer);
2851 else
2852 mod_timer(&hdev->cmd_timer,
6bd32326 2853 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2854 } else {
2855 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2856 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2857 }
2858 }
2859}
2519a1fc
AG		 2860
2861int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2862{
2863 /* General inquiry access code (GIAC) */
2864 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2865 struct hci_cp_inquiry cp;
2866
2867 BT_DBG("%s", hdev->name);
2868
2869 if (test_bit(HCI_INQUIRY, &hdev->flags))
2870 return -EINPROGRESS;
2871
4663262c
JH		 2872 inquiry_cache_flush(hdev);
2873
2519a1fc
AG		 2874 memset(&cp, 0, sizeof(cp));
2875 memcpy(&cp.lap, lap, sizeof(cp.lap));
2876 cp.length = length;
2877
2878 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2879}
023d5049
AG		 2880
2881int hci_cancel_inquiry(struct hci_dev *hdev)
2882{
2883 BT_DBG("%s", hdev->name);
2884
2885 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2886 return -EALREADY;
023d5049
AG		 2887
2888 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2889}
31f7956c
AG		 2890
2891u8 bdaddr_to_le(u8 bdaddr_type)
2892{
2893 switch (bdaddr_type) {
2894 case BDADDR_LE_PUBLIC:
2895 return ADDR_LE_DEV_PUBLIC;
2896
2897 default:
2898 /* Fallback to LE Random address type */
2899 return ADDR_LE_DEV_RANDOM;
2900 }
2901}
kernel source for telekom puls (alcatel/mediatek)