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Bluetooth: Add hci_do_le_scan()
[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
LT		 42#include <linux/interrupt.h>
43#include <linux/notifier.h>
611b30f7 44#include <linux/rfkill.h>
6bd32326 45#include <linux/timer.h>
3a0259bb 46#include <linux/crypto.h>
1da177e4
LT		 47#include <net/sock.h>
48
49#include <asm/system.h>
70f23020 50#include <linux/uaccess.h>
1da177e4
LT		 51#include <asm/unaligned.h>
52
53#include <net/bluetooth/bluetooth.h>
54#include <net/bluetooth/hci_core.h>
55
ab81cbf9
JH		 56#define AUTO_OFF_TIMEOUT 2000
57
8b281b9c 58bool enable_hs;
7784d78f 59
b78752cc 60static void hci_rx_work(struct work_struct *work);
c347b765 61static void hci_cmd_work(struct work_struct *work);
3eff45ea 62static void hci_tx_work(struct work_struct *work);
1da177e4 63
1da177e4
LT		 64/* HCI device list */
65LIST_HEAD(hci_dev_list);
66DEFINE_RWLOCK(hci_dev_list_lock);
67
68/* HCI callback list */
69LIST_HEAD(hci_cb_list);
70DEFINE_RWLOCK(hci_cb_list_lock);
71
1da177e4 72/* HCI notifiers list */
e041c683 73static ATOMIC_NOTIFIER_HEAD(hci_notifier);
1da177e4
LT		 74
75/* ---- HCI notifications ---- */
76
77int hci_register_notifier(struct notifier_block *nb)
78{
e041c683 79 return atomic_notifier_chain_register(&hci_notifier, nb);
1da177e4
LT		 80}
81
82int hci_unregister_notifier(struct notifier_block *nb)
83{
e041c683 84 return atomic_notifier_chain_unregister(&hci_notifier, nb);
1da177e4
LT		 85}
86
6516455d 87static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 88{
e041c683 89 atomic_notifier_call_chain(&hci_notifier, event, hdev);
1da177e4
LT		 90}
91
92/* ---- HCI requests ---- */
93
23bb5763 94void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 95{
23bb5763
JH		 96 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
97
a5040efa
JH		 98 /* If this is the init phase check if the completed command matches
99 * the last init command, and if not just return.
100 */
101 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)
23bb5763 102 return;
1da177e4
LT		 103
104 if (hdev->req_status == HCI_REQ_PEND) {
105 hdev->req_result = result;
106 hdev->req_status = HCI_REQ_DONE;
107 wake_up_interruptible(&hdev->req_wait_q);
108 }
109}
110
111static void hci_req_cancel(struct hci_dev *hdev, int err)
112{
113 BT_DBG("%s err 0x%2.2x", hdev->name, err);
114
115 if (hdev->req_status == HCI_REQ_PEND) {
116 hdev->req_result = err;
117 hdev->req_status = HCI_REQ_CANCELED;
118 wake_up_interruptible(&hdev->req_wait_q);
119 }
120}
121
122/* Execute request and wait for completion. */
8e87d142 123static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 124 unsigned long opt, __u32 timeout)
1da177e4
LT		 125{
126 DECLARE_WAITQUEUE(wait, current);
127 int err = 0;
128
129 BT_DBG("%s start", hdev->name);
130
131 hdev->req_status = HCI_REQ_PEND;
132
133 add_wait_queue(&hdev->req_wait_q, &wait);
134 set_current_state(TASK_INTERRUPTIBLE);
135
136 req(hdev, opt);
137 schedule_timeout(timeout);
138
139 remove_wait_queue(&hdev->req_wait_q, &wait);
140
141 if (signal_pending(current))
142 return -EINTR;
143
144 switch (hdev->req_status) {
145 case HCI_REQ_DONE:
e175072f 146 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 147 break;
148
149 case HCI_REQ_CANCELED:
150 err = -hdev->req_result;
151 break;
152
153 default:
154 err = -ETIMEDOUT;
155 break;
3ff50b79 156 }
1da177e4 157
a5040efa 158 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 159
160 BT_DBG("%s end: err %d", hdev->name, err);
161
162 return err;
163}
164
165static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 166 unsigned long opt, __u32 timeout)
1da177e4
LT		 167{
168 int ret;
169
7c6a329e
MH		 170 if (!test_bit(HCI_UP, &hdev->flags))
171 return -ENETDOWN;
172
1da177e4
LT		 173 /* Serialize all requests */
174 hci_req_lock(hdev);
175 ret = __hci_request(hdev, req, opt, timeout);
176 hci_req_unlock(hdev);
177
178 return ret;
179}
180
181static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
182{
183 BT_DBG("%s %ld", hdev->name, opt);
184
185 /* Reset device */
f630cf0d 186 set_bit(HCI_RESET, &hdev->flags);
a9de9248 187 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 188}
189
e61ef499 190static void bredr_init(struct hci_dev *hdev)
1da177e4 191{
b0916ea0 192 struct hci_cp_delete_stored_link_key cp;
1ebb9252 193 __le16 param;
89f2783d 194 __u8 flt_type;
1da177e4 195
2455a3ea
AE		 196 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
197
1da177e4
LT		 198 /* Mandatory initialization */
199
200 /* Reset */
f630cf0d 201 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
e61ef499
AE		 202 set_bit(HCI_RESET, &hdev->flags);
203 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 204 }
1da177e4
LT		 205
206 /* Read Local Supported Features */
a9de9248 207 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 208
1143e5a6 209 /* Read Local Version */
a9de9248 210 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 211
1da177e4 212 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 213 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 214
1da177e4 215 /* Read BD Address */
a9de9248
MH		 216 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
217
218 /* Read Class of Device */
219 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
220
221 /* Read Local Name */
222 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 223
224 /* Read Voice Setting */
a9de9248 225 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 226
227 /* Optional initialization */
228
229 /* Clear Event Filters */
89f2783d 230 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 231 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 232
1da177e4 233 /* Connection accept timeout ~20 secs */
aca3192c 234 param = cpu_to_le16(0x7d00);
a9de9248 235 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 236
237 bacpy(&cp.bdaddr, BDADDR_ANY);
238 cp.delete_all = 1;
239 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 240}
241
e61ef499
AE		 242static void amp_init(struct hci_dev *hdev)
243{
2455a3ea
AE		 244 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
245
e61ef499
AE		 246 /* Reset */
247 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
248
249 /* Read Local Version */
250 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
251}
252
253static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
254{
255 struct sk_buff *skb;
256
257 BT_DBG("%s %ld", hdev->name, opt);
258
259 /* Driver initialization */
260
261 /* Special commands */
262 while ((skb = skb_dequeue(&hdev->driver_init))) {
263 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
264 skb->dev = (void *) hdev;
265
266 skb_queue_tail(&hdev->cmd_q, skb);
267 queue_work(hdev->workqueue, &hdev->cmd_work);
268 }
269 skb_queue_purge(&hdev->driver_init);
270
271 switch (hdev->dev_type) {
272 case HCI_BREDR:
273 bredr_init(hdev);
274 break;
275
276 case HCI_AMP:
277 amp_init(hdev);
278 break;
279
280 default:
281 BT_ERR("Unknown device type %d", hdev->dev_type);
282 break;
283 }
284
285}
286
6ed58ec5
VT		 287static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
288{
289 BT_DBG("%s", hdev->name);
290
291 /* Read LE buffer size */
292 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
293}
294
1da177e4
LT		 295static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
296{
297 __u8 scan = opt;
298
299 BT_DBG("%s %x", hdev->name, scan);
300
301 /* Inquiry and Page scans */
a9de9248 302 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 303}
304
305static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
306{
307 __u8 auth = opt;
308
309 BT_DBG("%s %x", hdev->name, auth);
310
311 /* Authentication */
a9de9248 312 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 313}
314
315static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
316{
317 __u8 encrypt = opt;
318
319 BT_DBG("%s %x", hdev->name, encrypt);
320
e4e8e37c 321 /* Encryption */
a9de9248 322 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 323}
324
e4e8e37c
MH		 325static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
326{
327 __le16 policy = cpu_to_le16(opt);
328
a418b893 329 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 330
331 /* Default link policy */
332 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
333}
334
8e87d142 335/* Get HCI device by index.
1da177e4
LT		 336 * Device is held on return. */
337struct hci_dev *hci_dev_get(int index)
338{
8035ded4 339 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 340
341 BT_DBG("%d", index);
342
343 if (index < 0)
344 return NULL;
345
346 read_lock(&hci_dev_list_lock);
8035ded4 347 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 348 if (d->id == index) {
349 hdev = hci_dev_hold(d);
350 break;
351 }
352 }
353 read_unlock(&hci_dev_list_lock);
354 return hdev;
355}
1da177e4
LT		 356
357/* ---- Inquiry support ---- */
ff9ef578 358
30dc78e1
JH		 359bool hci_discovery_active(struct hci_dev *hdev)
360{
361 struct discovery_state *discov = &hdev->discovery;
362
6fbe195d
AG		 363 switch (discov->state) {
364 case DISCOVERY_INQUIRY:
365 case DISCOVERY_LE_SCAN:
366 case DISCOVERY_RESOLVING:
30dc78e1
JH		 367 return true;
368
6fbe195d
AG		 369 default:
370 return false;
371 }
30dc78e1
JH		 372}
373
ff9ef578
JH		 374void hci_discovery_set_state(struct hci_dev *hdev, int state)
375{
376 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
377
378 if (hdev->discovery.state == state)
379 return;
380
381 switch (state) {
382 case DISCOVERY_STOPPED:
383 mgmt_discovering(hdev, 0);
384 break;
385 case DISCOVERY_STARTING:
386 break;
30dc78e1 387 case DISCOVERY_INQUIRY:
c599008f 388 case DISCOVERY_LE_SCAN:
ff9ef578
JH		 389 mgmt_discovering(hdev, 1);
390 break;
30dc78e1
JH		 391 case DISCOVERY_RESOLVING:
392 break;
ff9ef578
JH		 393 case DISCOVERY_STOPPING:
394 break;
395 }
396
397 hdev->discovery.state = state;
398}
399
1da177e4
LT		 400static void inquiry_cache_flush(struct hci_dev *hdev)
401{
30883512 402 struct discovery_state *cache = &hdev->discovery;
b57c1a56 403 struct inquiry_entry *p, *n;
1da177e4 404
561aafbc
JH		 405 list_for_each_entry_safe(p, n, &cache->all, all) {
406 list_del(&p->all);
b57c1a56 407 kfree(p);
1da177e4 408 }
561aafbc
JH		 409
410 INIT_LIST_HEAD(&cache->unknown);
411 INIT_LIST_HEAD(&cache->resolve);
ff9ef578 412 cache->state = DISCOVERY_STOPPED;
1da177e4
LT		 413}
414
415struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
416{
30883512 417 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 418 struct inquiry_entry *e;
419
420 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
421
561aafbc
JH		 422 list_for_each_entry(e, &cache->all, all) {
423 if (!bacmp(&e->data.bdaddr, bdaddr))
424 return e;
425 }
426
427 return NULL;
428}
429
430struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
431 bdaddr_t *bdaddr)
432{
30883512 433 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 434 struct inquiry_entry *e;
435
436 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
437
438 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 439 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 440 return e;
441 }
442
443 return NULL;
1da177e4
LT		 444}
445
30dc78e1
JH		 446struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
447 bdaddr_t *bdaddr,
448 int state)
449{
450 struct discovery_state *cache = &hdev->discovery;
451 struct inquiry_entry *e;
452
453 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
454
455 list_for_each_entry(e, &cache->resolve, list) {
456 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
457 return e;
458 if (!bacmp(&e->data.bdaddr, bdaddr))
459 return e;
460 }
461
462 return NULL;
463}
464
a3d4e20a
JH		 465void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
466 struct inquiry_entry *ie)
467{
468 struct discovery_state *cache = &hdev->discovery;
469 struct list_head *pos = &cache->resolve;
470 struct inquiry_entry *p;
471
472 list_del(&ie->list);
473
474 list_for_each_entry(p, &cache->resolve, list) {
475 if (p->name_state != NAME_PENDING &&
476 abs(p->data.rssi) >= abs(ie->data.rssi))
477 break;
478 pos = &p->list;
479 }
480
481 list_add(&ie->list, pos);
482}
483
3175405b 484bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
561aafbc 485 bool name_known)
1da177e4 486{
30883512 487 struct discovery_state *cache = &hdev->discovery;
70f23020 488 struct inquiry_entry *ie;
1da177e4
LT		 489
490 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
491
70f23020 492 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a
JH		 493 if (ie) {
494 if (ie->name_state == NAME_NEEDED &&
495 data->rssi != ie->data.rssi) {
496 ie->data.rssi = data->rssi;
497 hci_inquiry_cache_update_resolve(hdev, ie);
498 }
499
561aafbc 500 goto update;
a3d4e20a 501 }
561aafbc
JH		 502
503 /* Entry not in the cache. Add new one. */
504 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
505 if (!ie)
3175405b 506 return false;
561aafbc
JH		 507
508 list_add(&ie->all, &cache->all);
509
510 if (name_known) {
511 ie->name_state = NAME_KNOWN;
512 } else {
513 ie->name_state = NAME_NOT_KNOWN;
514 list_add(&ie->list, &cache->unknown);
515 }
70f23020 516
561aafbc
JH		 517update:
518 if (name_known && ie->name_state != NAME_KNOWN &&
519 ie->name_state != NAME_PENDING) {
520 ie->name_state = NAME_KNOWN;
521 list_del(&ie->list);
1da177e4
LT		 522 }
523
70f23020
AE		 524 memcpy(&ie->data, data, sizeof(*data));
525 ie->timestamp = jiffies;
1da177e4 526 cache->timestamp = jiffies;
3175405b
JH		 527
528 if (ie->name_state == NAME_NOT_KNOWN)
529 return false;
530
531 return true;
1da177e4
LT		 532}
533
534static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
535{
30883512 536 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 537 struct inquiry_info *info = (struct inquiry_info *) buf;
538 struct inquiry_entry *e;
539 int copied = 0;
540
561aafbc 541 list_for_each_entry(e, &cache->all, all) {
1da177e4 542 struct inquiry_data *data = &e->data;
b57c1a56
JH		 543
544 if (copied >= num)
545 break;
546
1da177e4
LT		 547 bacpy(&info->bdaddr, &data->bdaddr);
548 info->pscan_rep_mode = data->pscan_rep_mode;
549 info->pscan_period_mode = data->pscan_period_mode;
550 info->pscan_mode = data->pscan_mode;
551 memcpy(info->dev_class, data->dev_class, 3);
552 info->clock_offset = data->clock_offset;
b57c1a56 553
1da177e4 554 info++;
b57c1a56 555 copied++;
1da177e4
LT		 556 }
557
558 BT_DBG("cache %p, copied %d", cache, copied);
559 return copied;
560}
561
562static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
563{
564 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
565 struct hci_cp_inquiry cp;
566
567 BT_DBG("%s", hdev->name);
568
569 if (test_bit(HCI_INQUIRY, &hdev->flags))
570 return;
571
572 /* Start Inquiry */
573 memcpy(&cp.lap, &ir->lap, 3);
574 cp.length = ir->length;
575 cp.num_rsp = ir->num_rsp;
a9de9248 576 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 577}
578
579int hci_inquiry(void __user *arg)
580{
581 __u8 __user *ptr = arg;
582 struct hci_inquiry_req ir;
583 struct hci_dev *hdev;
584 int err = 0, do_inquiry = 0, max_rsp;
585 long timeo;
586 __u8 *buf;
587
588 if (copy_from_user(&ir, ptr, sizeof(ir)))
589 return -EFAULT;
590
5a08ecce
AE		 591 hdev = hci_dev_get(ir.dev_id);
592 if (!hdev)
1da177e4
LT		 593 return -ENODEV;
594
09fd0de5 595 hci_dev_lock(hdev);
8e87d142 596 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 597 inquiry_cache_empty(hdev) ||
598 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 599 inquiry_cache_flush(hdev);
600 do_inquiry = 1;
601 }
09fd0de5 602 hci_dev_unlock(hdev);
1da177e4 603
04837f64 604 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 605
606 if (do_inquiry) {
607 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
608 if (err < 0)
609 goto done;
610 }
1da177e4
LT		 611
612 /* for unlimited number of responses we will use buffer with 255 entries */
613 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
614
615 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
616 * copy it to the user space.
617 */
01df8c31 618 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 619 if (!buf) {
1da177e4
LT		 620 err = -ENOMEM;
621 goto done;
622 }
623
09fd0de5 624 hci_dev_lock(hdev);
1da177e4 625 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 626 hci_dev_unlock(hdev);
1da177e4
LT		 627
628 BT_DBG("num_rsp %d", ir.num_rsp);
629
630 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
631 ptr += sizeof(ir);
632 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
633 ir.num_rsp))
634 err = -EFAULT;
8e87d142 635 } else
1da177e4
LT		 636 err = -EFAULT;
637
638 kfree(buf);
639
640done:
641 hci_dev_put(hdev);
642 return err;
643}
644
645/* ---- HCI ioctl helpers ---- */
646
647int hci_dev_open(__u16 dev)
648{
649 struct hci_dev *hdev;
650 int ret = 0;
651
5a08ecce
AE		 652 hdev = hci_dev_get(dev);
653 if (!hdev)
1da177e4
LT		 654 return -ENODEV;
655
656 BT_DBG("%s %p", hdev->name, hdev);
657
658 hci_req_lock(hdev);
659
611b30f7
MH		 660 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
661 ret = -ERFKILL;
662 goto done;
663 }
664
1da177e4
LT		 665 if (test_bit(HCI_UP, &hdev->flags)) {
666 ret = -EALREADY;
667 goto done;
668 }
669
670 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
671 set_bit(HCI_RAW, &hdev->flags);
672
07e3b94a
AE		 673 /* Treat all non BR/EDR controllers as raw devices if
674 enable_hs is not set */
675 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 676 set_bit(HCI_RAW, &hdev->flags);
677
1da177e4
LT		 678 if (hdev->open(hdev)) {
679 ret = -EIO;
680 goto done;
681 }
682
683 if (!test_bit(HCI_RAW, &hdev->flags)) {
684 atomic_set(&hdev->cmd_cnt, 1);
685 set_bit(HCI_INIT, &hdev->flags);
a5040efa 686 hdev->init_last_cmd = 0;
1da177e4 687
04837f64
MH		 688 ret = __hci_request(hdev, hci_init_req, 0,
689 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 690
eead27da 691 if (lmp_host_le_capable(hdev))
6ed58ec5
VT		 692 ret = __hci_request(hdev, hci_le_init_req, 0,
693 msecs_to_jiffies(HCI_INIT_TIMEOUT));
694
1da177e4
LT		 695 clear_bit(HCI_INIT, &hdev->flags);
696 }
697
698 if (!ret) {
699 hci_dev_hold(hdev);
700 set_bit(HCI_UP, &hdev->flags);
701 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 702 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 703 hci_dev_lock(hdev);
744cf19e 704 mgmt_powered(hdev, 1);
09fd0de5 705 hci_dev_unlock(hdev);
56e5cb86 706 }
8e87d142 707 } else {
1da177e4 708 /* Init failed, cleanup */
3eff45ea 709 flush_work(&hdev->tx_work);
c347b765 710 flush_work(&hdev->cmd_work);
b78752cc 711 flush_work(&hdev->rx_work);
1da177e4
LT		 712
713 skb_queue_purge(&hdev->cmd_q);
714 skb_queue_purge(&hdev->rx_q);
715
716 if (hdev->flush)
717 hdev->flush(hdev);
718
719 if (hdev->sent_cmd) {
720 kfree_skb(hdev->sent_cmd);
721 hdev->sent_cmd = NULL;
722 }
723
724 hdev->close(hdev);
725 hdev->flags = 0;
726 }
727
728done:
729 hci_req_unlock(hdev);
730 hci_dev_put(hdev);
731 return ret;
732}
733
734static int hci_dev_do_close(struct hci_dev *hdev)
735{
736 BT_DBG("%s %p", hdev->name, hdev);
737
738 hci_req_cancel(hdev, ENODEV);
739 hci_req_lock(hdev);
740
741 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 742 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 743 hci_req_unlock(hdev);
744 return 0;
745 }
746
3eff45ea
GP		 747 /* Flush RX and TX works */
748 flush_work(&hdev->tx_work);
b78752cc 749 flush_work(&hdev->rx_work);
1da177e4 750
16ab91ab 751 if (hdev->discov_timeout > 0) {
e0f9309f 752 cancel_delayed_work(&hdev->discov_off);
16ab91ab
JH		 753 hdev->discov_timeout = 0;
754 }
755
a8b2d5c2 756 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 757 cancel_delayed_work(&hdev->power_off);
3243553f 758
a8b2d5c2 759 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 760 cancel_delayed_work(&hdev->service_cache);
761
7ba8b4be
AG		 762 cancel_delayed_work_sync(&hdev->le_scan_disable);
763
09fd0de5 764 hci_dev_lock(hdev);
1da177e4
LT		 765 inquiry_cache_flush(hdev);
766 hci_conn_hash_flush(hdev);
09fd0de5 767 hci_dev_unlock(hdev);
1da177e4
LT		 768
769 hci_notify(hdev, HCI_DEV_DOWN);
770
771 if (hdev->flush)
772 hdev->flush(hdev);
773
774 /* Reset device */
775 skb_queue_purge(&hdev->cmd_q);
776 atomic_set(&hdev->cmd_cnt, 1);
8af59467
JH		 777 if (!test_bit(HCI_RAW, &hdev->flags) &&
778 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
1da177e4 779 set_bit(HCI_INIT, &hdev->flags);
04837f64 780 __hci_request(hdev, hci_reset_req, 0,
cad44c2b 781 msecs_to_jiffies(250));
1da177e4
LT		 782 clear_bit(HCI_INIT, &hdev->flags);
783 }
784
c347b765
GP		 785 /* flush cmd work */
786 flush_work(&hdev->cmd_work);
1da177e4
LT		 787
788 /* Drop queues */
789 skb_queue_purge(&hdev->rx_q);
790 skb_queue_purge(&hdev->cmd_q);
791 skb_queue_purge(&hdev->raw_q);
792
793 /* Drop last sent command */
794 if (hdev->sent_cmd) {
b79f44c1 795 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 796 kfree_skb(hdev->sent_cmd);
797 hdev->sent_cmd = NULL;
798 }
799
800 /* After this point our queues are empty
801 * and no tasks are scheduled. */
802 hdev->close(hdev);
803
09fd0de5 804 hci_dev_lock(hdev);
744cf19e 805 mgmt_powered(hdev, 0);
09fd0de5 806 hci_dev_unlock(hdev);
5add6af8 807
1da177e4
LT		 808 /* Clear flags */
809 hdev->flags = 0;
810
811 hci_req_unlock(hdev);
812
813 hci_dev_put(hdev);
814 return 0;
815}
816
817int hci_dev_close(__u16 dev)
818{
819 struct hci_dev *hdev;
820 int err;
821
70f23020
AE		 822 hdev = hci_dev_get(dev);
823 if (!hdev)
1da177e4
LT		 824 return -ENODEV;
825 err = hci_dev_do_close(hdev);
826 hci_dev_put(hdev);
827 return err;
828}
829
830int hci_dev_reset(__u16 dev)
831{
832 struct hci_dev *hdev;
833 int ret = 0;
834
70f23020
AE		 835 hdev = hci_dev_get(dev);
836 if (!hdev)
1da177e4
LT		 837 return -ENODEV;
838
839 hci_req_lock(hdev);
1da177e4
LT		 840
841 if (!test_bit(HCI_UP, &hdev->flags))
842 goto done;
843
844 /* Drop queues */
845 skb_queue_purge(&hdev->rx_q);
846 skb_queue_purge(&hdev->cmd_q);
847
09fd0de5 848 hci_dev_lock(hdev);
1da177e4
LT		 849 inquiry_cache_flush(hdev);
850 hci_conn_hash_flush(hdev);
09fd0de5 851 hci_dev_unlock(hdev);
1da177e4
LT		 852
853 if (hdev->flush)
854 hdev->flush(hdev);
855
8e87d142 856 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 857 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 858
859 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 860 ret = __hci_request(hdev, hci_reset_req, 0,
861 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 862
863done:
1da177e4
LT		 864 hci_req_unlock(hdev);
865 hci_dev_put(hdev);
866 return ret;
867}
868
869int hci_dev_reset_stat(__u16 dev)
870{
871 struct hci_dev *hdev;
872 int ret = 0;
873
70f23020
AE		 874 hdev = hci_dev_get(dev);
875 if (!hdev)
1da177e4
LT		 876 return -ENODEV;
877
878 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
879
880 hci_dev_put(hdev);
881
882 return ret;
883}
884
885int hci_dev_cmd(unsigned int cmd, void __user *arg)
886{
887 struct hci_dev *hdev;
888 struct hci_dev_req dr;
889 int err = 0;
890
891 if (copy_from_user(&dr, arg, sizeof(dr)))
892 return -EFAULT;
893
70f23020
AE		 894 hdev = hci_dev_get(dr.dev_id);
895 if (!hdev)
1da177e4
LT		 896 return -ENODEV;
897
898 switch (cmd) {
899 case HCISETAUTH:
04837f64
MH		 900 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
901 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 902 break;
903
904 case HCISETENCRYPT:
905 if (!lmp_encrypt_capable(hdev)) {
906 err = -EOPNOTSUPP;
907 break;
908 }
909
910 if (!test_bit(HCI_AUTH, &hdev->flags)) {
911 /* Auth must be enabled first */
04837f64
MH		 912 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
913 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 914 if (err)
915 break;
916 }
917
04837f64
MH		 918 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
919 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 920 break;
921
922 case HCISETSCAN:
04837f64
MH		 923 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
924 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 925 break;
926
1da177e4 927 case HCISETLINKPOL:
e4e8e37c
MH		 928 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
929 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 930 break;
931
932 case HCISETLINKMODE:
e4e8e37c
MH		 933 hdev->link_mode = ((__u16) dr.dev_opt) &
934 (HCI_LM_MASTER | HCI_LM_ACCEPT);
935 break;
936
937 case HCISETPTYPE:
938 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 939 break;
940
941 case HCISETACLMTU:
e4e8e37c
MH		 942 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
943 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 944 break;
945
946 case HCISETSCOMTU:
e4e8e37c
MH		 947 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
948 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 949 break;
950
951 default:
952 err = -EINVAL;
953 break;
954 }
e4e8e37c 955
1da177e4
LT		 956 hci_dev_put(hdev);
957 return err;
958}
959
960int hci_get_dev_list(void __user *arg)
961{
8035ded4 962 struct hci_dev *hdev;
1da177e4
LT		 963 struct hci_dev_list_req *dl;
964 struct hci_dev_req *dr;
1da177e4
LT		 965 int n = 0, size, err;
966 __u16 dev_num;
967
968 if (get_user(dev_num, (__u16 __user *) arg))
969 return -EFAULT;
970
971 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
972 return -EINVAL;
973
974 size = sizeof(*dl) + dev_num * sizeof(*dr);
975
70f23020
AE		 976 dl = kzalloc(size, GFP_KERNEL);
977 if (!dl)
1da177e4
LT		 978 return -ENOMEM;
979
980 dr = dl->dev_req;
981
f20d09d5 982 read_lock(&hci_dev_list_lock);
8035ded4 983 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 984 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 985 cancel_delayed_work(&hdev->power_off);
c542a06c 986
a8b2d5c2
JH		 987 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
988 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 989
1da177e4
LT		 990 (dr + n)->dev_id = hdev->id;
991 (dr + n)->dev_opt = hdev->flags;
c542a06c 992
1da177e4
LT		 993 if (++n >= dev_num)
994 break;
995 }
f20d09d5 996 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 997
998 dl->dev_num = n;
999 size = sizeof(*dl) + n * sizeof(*dr);
1000
1001 err = copy_to_user(arg, dl, size);
1002 kfree(dl);
1003
1004 return err ? -EFAULT : 0;
1005}
1006
1007int hci_get_dev_info(void __user *arg)
1008{
1009 struct hci_dev *hdev;
1010 struct hci_dev_info di;
1011 int err = 0;
1012
1013 if (copy_from_user(&di, arg, sizeof(di)))
1014 return -EFAULT;
1015
70f23020
AE		 1016 hdev = hci_dev_get(di.dev_id);
1017 if (!hdev)
1da177e4
LT		 1018 return -ENODEV;
1019
a8b2d5c2 1020 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1021 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1022
a8b2d5c2
JH		 1023 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1024 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1025
1da177e4
LT		 1026 strcpy(di.name, hdev->name);
1027 di.bdaddr = hdev->bdaddr;
943da25d 1028 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1029 di.flags = hdev->flags;
1030 di.pkt_type = hdev->pkt_type;
1031 di.acl_mtu = hdev->acl_mtu;
1032 di.acl_pkts = hdev->acl_pkts;
1033 di.sco_mtu = hdev->sco_mtu;
1034 di.sco_pkts = hdev->sco_pkts;
1035 di.link_policy = hdev->link_policy;
1036 di.link_mode = hdev->link_mode;
1037
1038 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1039 memcpy(&di.features, &hdev->features, sizeof(di.features));
1040
1041 if (copy_to_user(arg, &di, sizeof(di)))
1042 err = -EFAULT;
1043
1044 hci_dev_put(hdev);
1045
1046 return err;
1047}
1048
1049/* ---- Interface to HCI drivers ---- */
1050
611b30f7
MH		 1051static int hci_rfkill_set_block(void *data, bool blocked)
1052{
1053 struct hci_dev *hdev = data;
1054
1055 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1056
1057 if (!blocked)
1058 return 0;
1059
1060 hci_dev_do_close(hdev);
1061
1062 return 0;
1063}
1064
1065static const struct rfkill_ops hci_rfkill_ops = {
1066 .set_block = hci_rfkill_set_block,
1067};
1068
1da177e4
LT		 1069/* Alloc HCI device */
1070struct hci_dev *hci_alloc_dev(void)
1071{
1072 struct hci_dev *hdev;
1073
25ea6db0 1074 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 1075 if (!hdev)
1076 return NULL;
1077
0ac7e700 1078 hci_init_sysfs(hdev);
1da177e4
LT		 1079 skb_queue_head_init(&hdev->driver_init);
1080
1081 return hdev;
1082}
1083EXPORT_SYMBOL(hci_alloc_dev);
1084
1085/* Free HCI device */
1086void hci_free_dev(struct hci_dev *hdev)
1087{
1088 skb_queue_purge(&hdev->driver_init);
1089
a91f2e39
MH		 1090 /* will free via device release */
1091 put_device(&hdev->dev);
1da177e4
LT		 1092}
1093EXPORT_SYMBOL(hci_free_dev);
1094
ab81cbf9
JH		 1095static void hci_power_on(struct work_struct *work)
1096{
1097 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1098
1099 BT_DBG("%s", hdev->name);
1100
1101 if (hci_dev_open(hdev->id) < 0)
1102 return;
1103
a8b2d5c2 1104 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1105 schedule_delayed_work(&hdev->power_off,
3243553f 1106 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1107
a8b2d5c2 1108 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1109 mgmt_index_added(hdev);
ab81cbf9
JH		 1110}
1111
1112static void hci_power_off(struct work_struct *work)
1113{
3243553f
JH		 1114 struct hci_dev *hdev = container_of(work, struct hci_dev,
1115 power_off.work);
ab81cbf9
JH		 1116
1117 BT_DBG("%s", hdev->name);
1118
a8b2d5c2 1119 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ab81cbf9 1120
3243553f 1121 hci_dev_close(hdev->id);
ab81cbf9
JH		 1122}
1123
16ab91ab
JH		 1124static void hci_discov_off(struct work_struct *work)
1125{
1126 struct hci_dev *hdev;
1127 u8 scan = SCAN_PAGE;
1128
1129 hdev = container_of(work, struct hci_dev, discov_off.work);
1130
1131 BT_DBG("%s", hdev->name);
1132
09fd0de5 1133 hci_dev_lock(hdev);
16ab91ab
JH		 1134
1135 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1136
1137 hdev->discov_timeout = 0;
1138
09fd0de5 1139 hci_dev_unlock(hdev);
16ab91ab
JH		 1140}
1141
2aeb9a1a
JH		 1142int hci_uuids_clear(struct hci_dev *hdev)
1143{
1144 struct list_head *p, *n;
1145
1146 list_for_each_safe(p, n, &hdev->uuids) {
1147 struct bt_uuid *uuid;
1148
1149 uuid = list_entry(p, struct bt_uuid, list);
1150
1151 list_del(p);
1152 kfree(uuid);
1153 }
1154
1155 return 0;
1156}
1157
55ed8ca1
JH		 1158int hci_link_keys_clear(struct hci_dev *hdev)
1159{
1160 struct list_head *p, *n;
1161
1162 list_for_each_safe(p, n, &hdev->link_keys) {
1163 struct link_key *key;
1164
1165 key = list_entry(p, struct link_key, list);
1166
1167 list_del(p);
1168 kfree(key);
1169 }
1170
1171 return 0;
1172}
1173
b899efaf
VCG		 1174int hci_smp_ltks_clear(struct hci_dev *hdev)
1175{
1176 struct smp_ltk *k, *tmp;
1177
1178 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1179 list_del(&k->list);
1180 kfree(k);
1181 }
1182
1183 return 0;
1184}
1185
55ed8ca1
JH		 1186struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1187{
8035ded4 1188 struct link_key *k;
55ed8ca1 1189
8035ded4 1190 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1191 if (bacmp(bdaddr, &k->bdaddr) == 0)
1192 return k;
55ed8ca1
JH		 1193
1194 return NULL;
1195}
1196
d25e28ab
JH		 1197static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1198 u8 key_type, u8 old_key_type)
1199{
1200 /* Legacy key */
1201 if (key_type < 0x03)
1202 return 1;
1203
1204 /* Debug keys are insecure so don't store them persistently */
1205 if (key_type == HCI_LK_DEBUG_COMBINATION)
1206 return 0;
1207
1208 /* Changed combination key and there's no previous one */
1209 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1210 return 0;
1211
1212 /* Security mode 3 case */
1213 if (!conn)
1214 return 1;
1215
1216 /* Neither local nor remote side had no-bonding as requirement */
1217 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1218 return 1;
1219
1220 /* Local side had dedicated bonding as requirement */
1221 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1222 return 1;
1223
1224 /* Remote side had dedicated bonding as requirement */
1225 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1226 return 1;
1227
1228 /* If none of the above criteria match, then don't store the key
1229 * persistently */
1230 return 0;
1231}
1232
c9839a11 1233struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1234{
c9839a11 1235 struct smp_ltk *k;
75d262c2 1236
c9839a11
VCG		 1237 list_for_each_entry(k, &hdev->long_term_keys, list) {
1238 if (k->ediv != ediv ||
1239 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1240 continue;
1241
c9839a11 1242 return k;
75d262c2
VCG		 1243 }
1244
1245 return NULL;
1246}
1247EXPORT_SYMBOL(hci_find_ltk);
1248
c9839a11
VCG		 1249struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1250 u8 addr_type)
75d262c2 1251{
c9839a11 1252 struct smp_ltk *k;
75d262c2 1253
c9839a11
VCG		 1254 list_for_each_entry(k, &hdev->long_term_keys, list)
1255 if (addr_type == k->bdaddr_type &&
1256 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1257 return k;
1258
1259 return NULL;
1260}
c9839a11 1261EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1262
d25e28ab
JH		 1263int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1264 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1265{
1266 struct link_key *key, *old_key;
4df378a1 1267 u8 old_key_type, 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 &&
1287 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1288 old_key_type == 0xff) {
d25e28ab 1289 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1290 if (conn)
1291 conn->key_type = type;
1292 }
d25e28ab 1293
55ed8ca1
JH		 1294 bacpy(&key->bdaddr, bdaddr);
1295 memcpy(key->val, val, 16);
55ed8ca1
JH		 1296 key->pin_len = pin_len;
1297
b6020ba0 1298 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1299 key->type = old_key_type;
4748fed2
JH		 1300 else
1301 key->type = type;
1302
4df378a1
JH		 1303 if (!new_key)
1304 return 0;
1305
1306 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1307
744cf19e 1308 mgmt_new_link_key(hdev, key, persistent);
4df378a1
JH		 1309
1310 if (!persistent) {
1311 list_del(&key->list);
1312 kfree(key);
1313 }
55ed8ca1
JH		 1314
1315 return 0;
1316}
1317
c9839a11
VCG		 1318int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1319 int new_key, u8 authenticated, u8 tk[16],
1320 u8 enc_size, u16 ediv, u8 rand[8])
75d262c2 1321{
c9839a11 1322 struct smp_ltk *key, *old_key;
75d262c2 1323
c9839a11
VCG		 1324 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1325 return 0;
75d262c2 1326
c9839a11
VCG		 1327 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1328 if (old_key)
75d262c2 1329 key = old_key;
c9839a11
VCG		 1330 else {
1331 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1332 if (!key)
1333 return -ENOMEM;
c9839a11 1334 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1335 }
1336
75d262c2 1337 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1338 key->bdaddr_type = addr_type;
1339 memcpy(key->val, tk, sizeof(key->val));
1340 key->authenticated = authenticated;
1341 key->ediv = ediv;
1342 key->enc_size = enc_size;
1343 key->type = type;
1344 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1345
c9839a11
VCG		 1346 if (!new_key)
1347 return 0;
75d262c2 1348
261cc5aa
VCG		 1349 if (type & HCI_SMP_LTK)
1350 mgmt_new_ltk(hdev, key, 1);
1351
75d262c2
VCG		 1352 return 0;
1353}
1354
55ed8ca1
JH		 1355int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1356{
1357 struct link_key *key;
1358
1359 key = hci_find_link_key(hdev, bdaddr);
1360 if (!key)
1361 return -ENOENT;
1362
1363 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1364
1365 list_del(&key->list);
1366 kfree(key);
1367
1368 return 0;
1369}
1370
b899efaf
VCG		 1371int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1372{
1373 struct smp_ltk *k, *tmp;
1374
1375 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1376 if (bacmp(bdaddr, &k->bdaddr))
1377 continue;
1378
1379 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1380
1381 list_del(&k->list);
1382 kfree(k);
1383 }
1384
1385 return 0;
1386}
1387
6bd32326
VT		 1388/* HCI command timer function */
1389static void hci_cmd_timer(unsigned long arg)
1390{
1391 struct hci_dev *hdev = (void *) arg;
1392
1393 BT_ERR("%s command tx timeout", hdev->name);
1394 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1395 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1396}
1397
2763eda6
SJ		 1398struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1399 bdaddr_t *bdaddr)
1400{
1401 struct oob_data *data;
1402
1403 list_for_each_entry(data, &hdev->remote_oob_data, list)
1404 if (bacmp(bdaddr, &data->bdaddr) == 0)
1405 return data;
1406
1407 return NULL;
1408}
1409
1410int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1411{
1412 struct oob_data *data;
1413
1414 data = hci_find_remote_oob_data(hdev, bdaddr);
1415 if (!data)
1416 return -ENOENT;
1417
1418 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1419
1420 list_del(&data->list);
1421 kfree(data);
1422
1423 return 0;
1424}
1425
1426int hci_remote_oob_data_clear(struct hci_dev *hdev)
1427{
1428 struct oob_data *data, *n;
1429
1430 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1431 list_del(&data->list);
1432 kfree(data);
1433 }
1434
1435 return 0;
1436}
1437
1438int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1439 u8 *randomizer)
1440{
1441 struct oob_data *data;
1442
1443 data = hci_find_remote_oob_data(hdev, bdaddr);
1444
1445 if (!data) {
1446 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1447 if (!data)
1448 return -ENOMEM;
1449
1450 bacpy(&data->bdaddr, bdaddr);
1451 list_add(&data->list, &hdev->remote_oob_data);
1452 }
1453
1454 memcpy(data->hash, hash, sizeof(data->hash));
1455 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1456
1457 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1458
1459 return 0;
1460}
1461
b2a66aad
AJ		 1462struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
1463 bdaddr_t *bdaddr)
1464{
8035ded4 1465 struct bdaddr_list *b;
b2a66aad 1466
8035ded4 1467 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1468 if (bacmp(bdaddr, &b->bdaddr) == 0)
1469 return b;
b2a66aad
AJ		 1470
1471 return NULL;
1472}
1473
1474int hci_blacklist_clear(struct hci_dev *hdev)
1475{
1476 struct list_head *p, *n;
1477
1478 list_for_each_safe(p, n, &hdev->blacklist) {
1479 struct bdaddr_list *b;
1480
1481 b = list_entry(p, struct bdaddr_list, list);
1482
1483 list_del(p);
1484 kfree(b);
1485 }
1486
1487 return 0;
1488}
1489
1490int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr)
1491{
1492 struct bdaddr_list *entry;
b2a66aad
AJ		 1493
1494 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1495 return -EBADF;
1496
5e762444
AJ		 1497 if (hci_blacklist_lookup(hdev, bdaddr))
1498 return -EEXIST;
b2a66aad
AJ		 1499
1500 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1501 if (!entry)
1502 return -ENOMEM;
b2a66aad
AJ		 1503
1504 bacpy(&entry->bdaddr, bdaddr);
1505
1506 list_add(&entry->list, &hdev->blacklist);
1507
744cf19e 1508 return mgmt_device_blocked(hdev, bdaddr);
b2a66aad
AJ		 1509}
1510
1511int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr)
1512{
1513 struct bdaddr_list *entry;
b2a66aad 1514
1ec918ce 1515 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1516 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1517
1518 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1519 if (!entry)
5e762444 1520 return -ENOENT;
b2a66aad
AJ		 1521
1522 list_del(&entry->list);
1523 kfree(entry);
1524
744cf19e 1525 return mgmt_device_unblocked(hdev, bdaddr);
b2a66aad
AJ		 1526}
1527
db323f2f 1528static void hci_clear_adv_cache(struct work_struct *work)
35815085 1529{
db323f2f
GP		 1530 struct hci_dev *hdev = container_of(work, struct hci_dev,
1531 adv_work.work);
35815085
AG		 1532
1533 hci_dev_lock(hdev);
1534
1535 hci_adv_entries_clear(hdev);
1536
1537 hci_dev_unlock(hdev);
1538}
1539
76c8686f
AG		 1540int hci_adv_entries_clear(struct hci_dev *hdev)
1541{
1542 struct adv_entry *entry, *tmp;
1543
1544 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1545 list_del(&entry->list);
1546 kfree(entry);
1547 }
1548
1549 BT_DBG("%s adv cache cleared", hdev->name);
1550
1551 return 0;
1552}
1553
1554struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1555{
1556 struct adv_entry *entry;
1557
1558 list_for_each_entry(entry, &hdev->adv_entries, list)
1559 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1560 return entry;
1561
1562 return NULL;
1563}
1564
1565static inline int is_connectable_adv(u8 evt_type)
1566{
1567 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1568 return 1;
1569
1570 return 0;
1571}
1572
1573int hci_add_adv_entry(struct hci_dev *hdev,
1574 struct hci_ev_le_advertising_info *ev)
1575{
1576 struct adv_entry *entry;
1577
1578 if (!is_connectable_adv(ev->evt_type))
1579 return -EINVAL;
1580
1581 /* Only new entries should be added to adv_entries. So, if
1582 * bdaddr was found, don't add it. */
1583 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1584 return 0;
1585
4777bfde 1586 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
76c8686f
AG		 1587 if (!entry)
1588 return -ENOMEM;
1589
1590 bacpy(&entry->bdaddr, &ev->bdaddr);
1591 entry->bdaddr_type = ev->bdaddr_type;
1592
1593 list_add(&entry->list, &hdev->adv_entries);
1594
1595 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1596 batostr(&entry->bdaddr), entry->bdaddr_type);
1597
1598 return 0;
1599}
1600
7ba8b4be
AG		 1601static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1602{
1603 struct le_scan_params *param = (struct le_scan_params *) opt;
1604 struct hci_cp_le_set_scan_param cp;
1605
1606 memset(&cp, 0, sizeof(cp));
1607 cp.type = param->type;
1608 cp.interval = cpu_to_le16(param->interval);
1609 cp.window = cpu_to_le16(param->window);
1610
1611 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1612}
1613
1614static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1615{
1616 struct hci_cp_le_set_scan_enable cp;
1617
1618 memset(&cp, 0, sizeof(cp));
1619 cp.enable = 1;
1620
1621 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1622}
1623
1624static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1625 u16 window, int timeout)
1626{
1627 long timeo = msecs_to_jiffies(3000);
1628 struct le_scan_params param;
1629 int err;
1630
1631 BT_DBG("%s", hdev->name);
1632
1633 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1634 return -EINPROGRESS;
1635
1636 param.type = type;
1637 param.interval = interval;
1638 param.window = window;
1639
1640 hci_req_lock(hdev);
1641
1642 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
1643 timeo);
1644 if (!err)
1645 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1646
1647 hci_req_unlock(hdev);
1648
1649 if (err < 0)
1650 return err;
1651
1652 schedule_delayed_work(&hdev->le_scan_disable,
1653 msecs_to_jiffies(timeout));
1654
1655 return 0;
1656}
1657
1658static void le_scan_disable_work(struct work_struct *work)
1659{
1660 struct hci_dev *hdev = container_of(work, struct hci_dev,
1661 le_scan_disable.work);
1662 struct hci_cp_le_set_scan_enable cp;
1663
1664 BT_DBG("%s", hdev->name);
1665
1666 memset(&cp, 0, sizeof(cp));
1667
1668 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1669}
1670
1da177e4
LT		 1671/* Register HCI device */
1672int hci_register_dev(struct hci_dev *hdev)
1673{
1674 struct list_head *head = &hci_dev_list, *p;
08add513 1675 int i, id, error;
1da177e4 1676
e9b9cfa1 1677 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1678
010666a1 1679 if (!hdev->open || !hdev->close)
1da177e4
LT		 1680 return -EINVAL;
1681
08add513
MM		 1682 /* Do not allow HCI_AMP devices to register at index 0,
1683 * so the index can be used as the AMP controller ID.
1684 */
1685 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
1686
f20d09d5 1687 write_lock(&hci_dev_list_lock);
1da177e4
LT		 1688
1689 /* Find first available device id */
1690 list_for_each(p, &hci_dev_list) {
1691 if (list_entry(p, struct hci_dev, list)->id != id)
1692 break;
1693 head = p; id++;
1694 }
8e87d142 1695
1da177e4
LT		 1696 sprintf(hdev->name, "hci%d", id);
1697 hdev->id = id;
c6feeb28 1698 list_add_tail(&hdev->list, head);
1da177e4 1699
09fd0de5 1700 mutex_init(&hdev->lock);
1da177e4
LT		 1701
1702 hdev->flags = 0;
d23264a8 1703 hdev->dev_flags = 0;
1da177e4 1704 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1705 hdev->esco_type = (ESCO_HV1);
1da177e4 1706 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1707 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1708
04837f64
MH		 1709 hdev->idle_timeout = 0;
1710 hdev->sniff_max_interval = 800;
1711 hdev->sniff_min_interval = 80;
1712
b78752cc 1713 INIT_WORK(&hdev->rx_work, hci_rx_work);
c347b765 1714 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3eff45ea 1715 INIT_WORK(&hdev->tx_work, hci_tx_work);
b78752cc 1716
1da177e4
LT		 1717
1718 skb_queue_head_init(&hdev->rx_q);
1719 skb_queue_head_init(&hdev->cmd_q);
1720 skb_queue_head_init(&hdev->raw_q);
1721
6bd32326
VT		 1722 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1723
cd4c5391 1724 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1725 hdev->reassembly[i] = NULL;
1726
1da177e4 1727 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1728 mutex_init(&hdev->req_lock);
1da177e4 1729
30883512 1730 discovery_init(hdev);
1da177e4
LT		 1731
1732 hci_conn_hash_init(hdev);
1733
2e58ef3e
JH		 1734 INIT_LIST_HEAD(&hdev->mgmt_pending);
1735
ea4bd8ba 1736 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1737
2aeb9a1a
JH		 1738 INIT_LIST_HEAD(&hdev->uuids);
1739
55ed8ca1 1740 INIT_LIST_HEAD(&hdev->link_keys);
b899efaf 1741 INIT_LIST_HEAD(&hdev->long_term_keys);
55ed8ca1 1742
2763eda6
SJ		 1743 INIT_LIST_HEAD(&hdev->remote_oob_data);
1744
76c8686f
AG		 1745 INIT_LIST_HEAD(&hdev->adv_entries);
1746
db323f2f 1747 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
ab81cbf9 1748 INIT_WORK(&hdev->power_on, hci_power_on);
3243553f 1749 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
ab81cbf9 1750
16ab91ab
JH		 1751 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1752
1da177e4
LT		 1753 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1754
1755 atomic_set(&hdev->promisc, 0);
1756
7ba8b4be
AG		 1757 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1758
f20d09d5 1759 write_unlock(&hci_dev_list_lock);
1da177e4 1760
32845eb1
GP		 1761 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1762 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1763 if (!hdev->workqueue) {
1764 error = -ENOMEM;
1765 goto err;
1766 }
f48fd9c8 1767
33ca954d
DH		 1768 error = hci_add_sysfs(hdev);
1769 if (error < 0)
1770 goto err_wqueue;
1da177e4 1771
611b30f7
MH		 1772 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1773 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1774 if (hdev->rfkill) {
1775 if (rfkill_register(hdev->rfkill) < 0) {
1776 rfkill_destroy(hdev->rfkill);
1777 hdev->rfkill = NULL;
1778 }
1779 }
1780
a8b2d5c2
JH		 1781 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1782 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1783 schedule_work(&hdev->power_on);
ab81cbf9 1784
1da177e4 1785 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1786 hci_dev_hold(hdev);
1da177e4
LT		 1787
1788 return id;
f48fd9c8 1789
33ca954d
DH		 1790err_wqueue:
1791 destroy_workqueue(hdev->workqueue);
1792err:
f20d09d5 1793 write_lock(&hci_dev_list_lock);
f48fd9c8 1794 list_del(&hdev->list);
f20d09d5 1795 write_unlock(&hci_dev_list_lock);
f48fd9c8 1796
33ca954d 1797 return error;
1da177e4
LT		 1798}
1799EXPORT_SYMBOL(hci_register_dev);
1800
1801/* Unregister HCI device */
59735631 1802void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1803{
ef222013
MH		 1804 int i;
1805
c13854ce 1806 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1807
f20d09d5 1808 write_lock(&hci_dev_list_lock);
1da177e4 1809 list_del(&hdev->list);
f20d09d5 1810 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1811
1812 hci_dev_do_close(hdev);
1813
cd4c5391 1814 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1815 kfree_skb(hdev->reassembly[i]);
1816
ab81cbf9 1817 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1818 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1819 hci_dev_lock(hdev);
744cf19e 1820 mgmt_index_removed(hdev);
09fd0de5 1821 hci_dev_unlock(hdev);
56e5cb86 1822 }
ab81cbf9 1823
2e58ef3e
JH		 1824 /* mgmt_index_removed should take care of emptying the
1825 * pending list */
1826 BUG_ON(!list_empty(&hdev->mgmt_pending));
1827
1da177e4
LT		 1828 hci_notify(hdev, HCI_DEV_UNREG);
1829
611b30f7
MH		 1830 if (hdev->rfkill) {
1831 rfkill_unregister(hdev->rfkill);
1832 rfkill_destroy(hdev->rfkill);
1833 }
1834
ce242970 1835 hci_del_sysfs(hdev);
147e2d59 1836
db323f2f 1837 cancel_delayed_work_sync(&hdev->adv_work);
c6f3c5f7 1838
f48fd9c8
MH		 1839 destroy_workqueue(hdev->workqueue);
1840
09fd0de5 1841 hci_dev_lock(hdev);
e2e0cacb 1842 hci_blacklist_clear(hdev);
2aeb9a1a 1843 hci_uuids_clear(hdev);
55ed8ca1 1844 hci_link_keys_clear(hdev);
b899efaf 1845 hci_smp_ltks_clear(hdev);
2763eda6 1846 hci_remote_oob_data_clear(hdev);
76c8686f 1847 hci_adv_entries_clear(hdev);
09fd0de5 1848 hci_dev_unlock(hdev);
e2e0cacb 1849
dc946bd8 1850 hci_dev_put(hdev);
1da177e4
LT		 1851}
1852EXPORT_SYMBOL(hci_unregister_dev);
1853
1854/* Suspend HCI device */
1855int hci_suspend_dev(struct hci_dev *hdev)
1856{
1857 hci_notify(hdev, HCI_DEV_SUSPEND);
1858 return 0;
1859}
1860EXPORT_SYMBOL(hci_suspend_dev);
1861
1862/* Resume HCI device */
1863int hci_resume_dev(struct hci_dev *hdev)
1864{
1865 hci_notify(hdev, HCI_DEV_RESUME);
1866 return 0;
1867}
1868EXPORT_SYMBOL(hci_resume_dev);
1869
76bca880
MH		 1870/* Receive frame from HCI drivers */
1871int hci_recv_frame(struct sk_buff *skb)
1872{
1873 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1874 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1875 && !test_bit(HCI_INIT, &hdev->flags))) {
1876 kfree_skb(skb);
1877 return -ENXIO;
1878 }
1879
1880 /* Incomming skb */
1881 bt_cb(skb)->incoming = 1;
1882
1883 /* Time stamp */
1884 __net_timestamp(skb);
1885
76bca880 1886 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1887 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1888
76bca880
MH		 1889 return 0;
1890}
1891EXPORT_SYMBOL(hci_recv_frame);
1892
33e882a5 1893static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1894 int count, __u8 index)
33e882a5
SS		 1895{
1896 int len = 0;
1897 int hlen = 0;
1898 int remain = count;
1899 struct sk_buff *skb;
1900 struct bt_skb_cb *scb;
1901
1902 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1903 index >= NUM_REASSEMBLY)
1904 return -EILSEQ;
1905
1906 skb = hdev->reassembly[index];
1907
1908 if (!skb) {
1909 switch (type) {
1910 case HCI_ACLDATA_PKT:
1911 len = HCI_MAX_FRAME_SIZE;
1912 hlen = HCI_ACL_HDR_SIZE;
1913 break;
1914 case HCI_EVENT_PKT:
1915 len = HCI_MAX_EVENT_SIZE;
1916 hlen = HCI_EVENT_HDR_SIZE;
1917 break;
1918 case HCI_SCODATA_PKT:
1919 len = HCI_MAX_SCO_SIZE;
1920 hlen = HCI_SCO_HDR_SIZE;
1921 break;
1922 }
1923
1e429f38 1924 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1925 if (!skb)
1926 return -ENOMEM;
1927
1928 scb = (void *) skb->cb;
1929 scb->expect = hlen;
1930 scb->pkt_type = type;
1931
1932 skb->dev = (void *) hdev;
1933 hdev->reassembly[index] = skb;
1934 }
1935
1936 while (count) {
1937 scb = (void *) skb->cb;
1938 len = min(scb->expect, (__u16)count);
1939
1940 memcpy(skb_put(skb, len), data, len);
1941
1942 count -= len;
1943 data += len;
1944 scb->expect -= len;
1945 remain = count;
1946
1947 switch (type) {
1948 case HCI_EVENT_PKT:
1949 if (skb->len == HCI_EVENT_HDR_SIZE) {
1950 struct hci_event_hdr *h = hci_event_hdr(skb);
1951 scb->expect = h->plen;
1952
1953 if (skb_tailroom(skb) < scb->expect) {
1954 kfree_skb(skb);
1955 hdev->reassembly[index] = NULL;
1956 return -ENOMEM;
1957 }
1958 }
1959 break;
1960
1961 case HCI_ACLDATA_PKT:
1962 if (skb->len == HCI_ACL_HDR_SIZE) {
1963 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1964 scb->expect = __le16_to_cpu(h->dlen);
1965
1966 if (skb_tailroom(skb) < scb->expect) {
1967 kfree_skb(skb);
1968 hdev->reassembly[index] = NULL;
1969 return -ENOMEM;
1970 }
1971 }
1972 break;
1973
1974 case HCI_SCODATA_PKT:
1975 if (skb->len == HCI_SCO_HDR_SIZE) {
1976 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1977 scb->expect = h->dlen;
1978
1979 if (skb_tailroom(skb) < scb->expect) {
1980 kfree_skb(skb);
1981 hdev->reassembly[index] = NULL;
1982 return -ENOMEM;
1983 }
1984 }
1985 break;
1986 }
1987
1988 if (scb->expect == 0) {
1989 /* Complete frame */
1990
1991 bt_cb(skb)->pkt_type = type;
1992 hci_recv_frame(skb);
1993
1994 hdev->reassembly[index] = NULL;
1995 return remain;
1996 }
1997 }
1998
1999 return remain;
2000}
2001
ef222013
MH		 2002int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2003{
f39a3c06
SS		 2004 int rem = 0;
2005
ef222013
MH		 2006 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2007 return -EILSEQ;
2008
da5f6c37 2009 while (count) {
1e429f38 2010 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2011 if (rem < 0)
2012 return rem;
ef222013 2013
f39a3c06
SS		 2014 data += (count - rem);
2015 count = rem;
f81c6224 2016 }
ef222013 2017
f39a3c06 2018 return rem;
ef222013
MH		 2019}
2020EXPORT_SYMBOL(hci_recv_fragment);
2021
99811510
SS		 2022#define STREAM_REASSEMBLY 0
2023
2024int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2025{
2026 int type;
2027 int rem = 0;
2028
da5f6c37 2029 while (count) {
99811510
SS		 2030 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2031
2032 if (!skb) {
2033 struct { char type; } *pkt;
2034
2035 /* Start of the frame */
2036 pkt = data;
2037 type = pkt->type;
2038
2039 data++;
2040 count--;
2041 } else
2042 type = bt_cb(skb)->pkt_type;
2043
1e429f38
GP		 2044 rem = hci_reassembly(hdev, type, data, count,
2045 STREAM_REASSEMBLY);
99811510
SS		 2046 if (rem < 0)
2047 return rem;
2048
2049 data += (count - rem);
2050 count = rem;
f81c6224 2051 }
99811510
SS		 2052
2053 return rem;
2054}
2055EXPORT_SYMBOL(hci_recv_stream_fragment);
2056
1da177e4
LT		 2057/* ---- Interface to upper protocols ---- */
2058
1da177e4
LT		 2059int hci_register_cb(struct hci_cb *cb)
2060{
2061 BT_DBG("%p name %s", cb, cb->name);
2062
f20d09d5 2063 write_lock(&hci_cb_list_lock);
1da177e4 2064 list_add(&cb->list, &hci_cb_list);
f20d09d5 2065 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2066
2067 return 0;
2068}
2069EXPORT_SYMBOL(hci_register_cb);
2070
2071int hci_unregister_cb(struct hci_cb *cb)
2072{
2073 BT_DBG("%p name %s", cb, cb->name);
2074
f20d09d5 2075 write_lock(&hci_cb_list_lock);
1da177e4 2076 list_del(&cb->list);
f20d09d5 2077 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2078
2079 return 0;
2080}
2081EXPORT_SYMBOL(hci_unregister_cb);
2082
2083static int hci_send_frame(struct sk_buff *skb)
2084{
2085 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2086
2087 if (!hdev) {
2088 kfree_skb(skb);
2089 return -ENODEV;
2090 }
2091
0d48d939 2092 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4
LT		 2093
2094 if (atomic_read(&hdev->promisc)) {
2095 /* Time stamp */
a61bbcf2 2096 __net_timestamp(skb);
1da177e4 2097
eec8d2bc 2098 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 2099 }
2100
2101 /* Get rid of skb owner, prior to sending to the driver. */
2102 skb_orphan(skb);
2103
2104 return hdev->send(skb);
2105}
2106
2107/* Send HCI command */
a9de9248 2108int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2109{
2110 int len = HCI_COMMAND_HDR_SIZE + plen;
2111 struct hci_command_hdr *hdr;
2112 struct sk_buff *skb;
2113
a9de9248 2114 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2115
2116 skb = bt_skb_alloc(len, GFP_ATOMIC);
2117 if (!skb) {
ef222013 2118 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2119 return -ENOMEM;
2120 }
2121
2122 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2123 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2124 hdr->plen = plen;
2125
2126 if (plen)
2127 memcpy(skb_put(skb, plen), param, plen);
2128
2129 BT_DBG("skb len %d", skb->len);
2130
0d48d939 2131 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2132 skb->dev = (void *) hdev;
c78ae283 2133
a5040efa
JH		 2134 if (test_bit(HCI_INIT, &hdev->flags))
2135 hdev->init_last_cmd = opcode;
2136
1da177e4 2137 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2138 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2139
2140 return 0;
2141}
1da177e4
LT		 2142
2143/* Get data from the previously sent command */
a9de9248 2144void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2145{
2146 struct hci_command_hdr *hdr;
2147
2148 if (!hdev->sent_cmd)
2149 return NULL;
2150
2151 hdr = (void *) hdev->sent_cmd->data;
2152
a9de9248 2153 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2154 return NULL;
2155
a9de9248 2156 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2157
2158 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2159}
2160
2161/* Send ACL data */
2162static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2163{
2164 struct hci_acl_hdr *hdr;
2165 int len = skb->len;
2166
badff6d0
ACM		 2167 skb_push(skb, HCI_ACL_HDR_SIZE);
2168 skb_reset_transport_header(skb);
9c70220b 2169 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2170 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2171 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2172}
2173
73d80deb
LAD		 2174static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2175 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2176{
2177 struct hci_dev *hdev = conn->hdev;
2178 struct sk_buff *list;
2179
70f23020
AE		 2180 list = skb_shinfo(skb)->frag_list;
2181 if (!list) {
1da177e4
LT		 2182 /* Non fragmented */
2183 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2184
73d80deb 2185 skb_queue_tail(queue, skb);
1da177e4
LT		 2186 } else {
2187 /* Fragmented */
2188 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2189
2190 skb_shinfo(skb)->frag_list = NULL;
2191
2192 /* Queue all fragments atomically */
af3e6359 2193 spin_lock(&queue->lock);
1da177e4 2194
73d80deb 2195 __skb_queue_tail(queue, skb);
e702112f
AE		 2196
2197 flags &= ~ACL_START;
2198 flags |= ACL_CONT;
1da177e4
LT		 2199 do {
2200 skb = list; list = list->next;
8e87d142 2201
1da177e4 2202 skb->dev = (void *) hdev;
0d48d939 2203 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2204 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2205
2206 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2207
73d80deb 2208 __skb_queue_tail(queue, skb);
1da177e4
LT		 2209 } while (list);
2210
af3e6359 2211 spin_unlock(&queue->lock);
1da177e4 2212 }
73d80deb
LAD		 2213}
2214
2215void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2216{
2217 struct hci_conn *conn = chan->conn;
2218 struct hci_dev *hdev = conn->hdev;
2219
2220 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2221
2222 skb->dev = (void *) hdev;
2223 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2224 hci_add_acl_hdr(skb, conn->handle, flags);
2225
2226 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2227
3eff45ea 2228 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2229}
2230EXPORT_SYMBOL(hci_send_acl);
2231
2232/* Send SCO data */
0d861d8b 2233void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2234{
2235 struct hci_dev *hdev = conn->hdev;
2236 struct hci_sco_hdr hdr;
2237
2238 BT_DBG("%s len %d", hdev->name, skb->len);
2239
aca3192c 2240 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2241 hdr.dlen = skb->len;
2242
badff6d0
ACM		 2243 skb_push(skb, HCI_SCO_HDR_SIZE);
2244 skb_reset_transport_header(skb);
9c70220b 2245 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2246
2247 skb->dev = (void *) hdev;
0d48d939 2248 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2249
1da177e4 2250 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2251 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2252}
2253EXPORT_SYMBOL(hci_send_sco);
2254
2255/* ---- HCI TX task (outgoing data) ---- */
2256
2257/* HCI Connection scheduler */
2258static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2259{
2260 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2261 struct hci_conn *conn = NULL, *c;
1da177e4 2262 int num = 0, min = ~0;
1da177e4 2263
8e87d142 2264 /* We don't have to lock device here. Connections are always
1da177e4 2265 * added and removed with TX task disabled. */
bf4c6325
GP		 2266
2267 rcu_read_lock();
2268
2269 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2270 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2271 continue;
769be974
MH		 2272
2273 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2274 continue;
2275
1da177e4
LT		 2276 num++;
2277
2278 if (c->sent < min) {
2279 min = c->sent;
2280 conn = c;
2281 }
52087a79
LAD		 2282
2283 if (hci_conn_num(hdev, type) == num)
2284 break;
1da177e4
LT		 2285 }
2286
bf4c6325
GP		 2287 rcu_read_unlock();
2288
1da177e4 2289 if (conn) {
6ed58ec5
VT		 2290 int cnt, q;
2291
2292 switch (conn->type) {
2293 case ACL_LINK:
2294 cnt = hdev->acl_cnt;
2295 break;
2296 case SCO_LINK:
2297 case ESCO_LINK:
2298 cnt = hdev->sco_cnt;
2299 break;
2300 case LE_LINK:
2301 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2302 break;
2303 default:
2304 cnt = 0;
2305 BT_ERR("Unknown link type");
2306 }
2307
2308 q = cnt / num;
1da177e4
LT		 2309 *quote = q ? q : 1;
2310 } else
2311 *quote = 0;
2312
2313 BT_DBG("conn %p quote %d", conn, *quote);
2314 return conn;
2315}
2316
bae1f5d9 2317static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2318{
2319 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2320 struct hci_conn *c;
1da177e4 2321
bae1f5d9 2322 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2323
bf4c6325
GP		 2324 rcu_read_lock();
2325
1da177e4 2326 /* Kill stalled connections */
bf4c6325 2327 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2328 if (c->type == type && c->sent) {
2329 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2330 hdev->name, batostr(&c->dst));
2331 hci_acl_disconn(c, 0x13);
2332 }
2333 }
bf4c6325
GP		 2334
2335 rcu_read_unlock();
1da177e4
LT		 2336}
2337
73d80deb
LAD		 2338static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2339 int *quote)
1da177e4 2340{
73d80deb
LAD		 2341 struct hci_conn_hash *h = &hdev->conn_hash;
2342 struct hci_chan *chan = NULL;
2343 int num = 0, min = ~0, cur_prio = 0;
1da177e4 2344 struct hci_conn *conn;
73d80deb
LAD		 2345 int cnt, q, conn_num = 0;
2346
2347 BT_DBG("%s", hdev->name);
2348
bf4c6325
GP		 2349 rcu_read_lock();
2350
2351 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2352 struct hci_chan *tmp;
2353
2354 if (conn->type != type)
2355 continue;
2356
2357 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2358 continue;
2359
2360 conn_num++;
2361
8192edef 2362 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2363 struct sk_buff *skb;
2364
2365 if (skb_queue_empty(&tmp->data_q))
2366 continue;
2367
2368 skb = skb_peek(&tmp->data_q);
2369 if (skb->priority < cur_prio)
2370 continue;
2371
2372 if (skb->priority > cur_prio) {
2373 num = 0;
2374 min = ~0;
2375 cur_prio = skb->priority;
2376 }
2377
2378 num++;
2379
2380 if (conn->sent < min) {
2381 min = conn->sent;
2382 chan = tmp;
2383 }
2384 }
2385
2386 if (hci_conn_num(hdev, type) == conn_num)
2387 break;
2388 }
2389
bf4c6325
GP		 2390 rcu_read_unlock();
2391
73d80deb
LAD		 2392 if (!chan)
2393 return NULL;
2394
2395 switch (chan->conn->type) {
2396 case ACL_LINK:
2397 cnt = hdev->acl_cnt;
2398 break;
2399 case SCO_LINK:
2400 case ESCO_LINK:
2401 cnt = hdev->sco_cnt;
2402 break;
2403 case LE_LINK:
2404 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2405 break;
2406 default:
2407 cnt = 0;
2408 BT_ERR("Unknown link type");
2409 }
2410
2411 q = cnt / num;
2412 *quote = q ? q : 1;
2413 BT_DBG("chan %p quote %d", chan, *quote);
2414 return chan;
2415}
2416
02b20f0b
LAD		 2417static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2418{
2419 struct hci_conn_hash *h = &hdev->conn_hash;
2420 struct hci_conn *conn;
2421 int num = 0;
2422
2423 BT_DBG("%s", hdev->name);
2424
bf4c6325
GP		 2425 rcu_read_lock();
2426
2427 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2428 struct hci_chan *chan;
2429
2430 if (conn->type != type)
2431 continue;
2432
2433 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2434 continue;
2435
2436 num++;
2437
8192edef 2438 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2439 struct sk_buff *skb;
2440
2441 if (chan->sent) {
2442 chan->sent = 0;
2443 continue;
2444 }
2445
2446 if (skb_queue_empty(&chan->data_q))
2447 continue;
2448
2449 skb = skb_peek(&chan->data_q);
2450 if (skb->priority >= HCI_PRIO_MAX - 1)
2451 continue;
2452
2453 skb->priority = HCI_PRIO_MAX - 1;
2454
2455 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2456 skb->priority);
2457 }
2458
2459 if (hci_conn_num(hdev, type) == num)
2460 break;
2461 }
bf4c6325
GP		 2462
2463 rcu_read_unlock();
2464
02b20f0b
LAD		 2465}
2466
b71d385a
AE		 2467static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2468{
2469 /* Calculate count of blocks used by this packet */
2470 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2471}
2472
63d2bc1b 2473static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2474{
1da177e4
LT		 2475 if (!test_bit(HCI_RAW, &hdev->flags)) {
2476 /* ACL tx timeout must be longer than maximum
2477 * link supervision timeout (40.9 seconds) */
63d2bc1b 2478 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
cc48dc0a 2479 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2480 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2481 }
63d2bc1b 2482}
1da177e4 2483
63d2bc1b
AE		 2484static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2485{
2486 unsigned int cnt = hdev->acl_cnt;
2487 struct hci_chan *chan;
2488 struct sk_buff *skb;
2489 int quote;
2490
2491 __check_timeout(hdev, cnt);
04837f64 2492
73d80deb
LAD		 2493 while (hdev->acl_cnt &&
2494 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2495 u32 priority = (skb_peek(&chan->data_q))->priority;
2496 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2497 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2498 skb->len, skb->priority);
2499
ec1cce24
LAD		 2500 /* Stop if priority has changed */
2501 if (skb->priority < priority)
2502 break;
2503
2504 skb = skb_dequeue(&chan->data_q);
2505
73d80deb
LAD		 2506 hci_conn_enter_active_mode(chan->conn,
2507 bt_cb(skb)->force_active);
04837f64 2508
1da177e4
LT		 2509 hci_send_frame(skb);
2510 hdev->acl_last_tx = jiffies;
2511
2512 hdev->acl_cnt--;
73d80deb
LAD		 2513 chan->sent++;
2514 chan->conn->sent++;
1da177e4
LT		 2515 }
2516 }
02b20f0b
LAD		 2517
2518 if (cnt != hdev->acl_cnt)
2519 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2520}
2521
b71d385a
AE		 2522static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2523{
63d2bc1b 2524 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2525 struct hci_chan *chan;
2526 struct sk_buff *skb;
2527 int quote;
b71d385a 2528
63d2bc1b 2529 __check_timeout(hdev, cnt);
b71d385a
AE		 2530
2531 while (hdev->block_cnt > 0 &&
2532 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2533 u32 priority = (skb_peek(&chan->data_q))->priority;
2534 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2535 int blocks;
2536
2537 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2538 skb->len, skb->priority);
2539
2540 /* Stop if priority has changed */
2541 if (skb->priority < priority)
2542 break;
2543
2544 skb = skb_dequeue(&chan->data_q);
2545
2546 blocks = __get_blocks(hdev, skb);
2547 if (blocks > hdev->block_cnt)
2548 return;
2549
2550 hci_conn_enter_active_mode(chan->conn,
2551 bt_cb(skb)->force_active);
2552
2553 hci_send_frame(skb);
2554 hdev->acl_last_tx = jiffies;
2555
2556 hdev->block_cnt -= blocks;
2557 quote -= blocks;
2558
2559 chan->sent += blocks;
2560 chan->conn->sent += blocks;
2561 }
2562 }
2563
2564 if (cnt != hdev->block_cnt)
2565 hci_prio_recalculate(hdev, ACL_LINK);
2566}
2567
2568static inline void hci_sched_acl(struct hci_dev *hdev)
2569{
2570 BT_DBG("%s", hdev->name);
2571
2572 if (!hci_conn_num(hdev, ACL_LINK))
2573 return;
2574
2575 switch (hdev->flow_ctl_mode) {
2576 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2577 hci_sched_acl_pkt(hdev);
2578 break;
2579
2580 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2581 hci_sched_acl_blk(hdev);
2582 break;
2583 }
2584}
2585
1da177e4
LT		 2586/* Schedule SCO */
2587static inline void hci_sched_sco(struct hci_dev *hdev)
2588{
2589 struct hci_conn *conn;
2590 struct sk_buff *skb;
2591 int quote;
2592
2593 BT_DBG("%s", hdev->name);
2594
52087a79
LAD		 2595 if (!hci_conn_num(hdev, SCO_LINK))
2596 return;
2597
1da177e4
LT		 2598 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2599 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2600 BT_DBG("skb %p len %d", skb, skb->len);
2601 hci_send_frame(skb);
2602
2603 conn->sent++;
2604 if (conn->sent == ~0)
2605 conn->sent = 0;
2606 }
2607 }
2608}
2609
b6a0dc82
MH		 2610static inline void hci_sched_esco(struct hci_dev *hdev)
2611{
2612 struct hci_conn *conn;
2613 struct sk_buff *skb;
2614 int quote;
2615
2616 BT_DBG("%s", hdev->name);
2617
52087a79
LAD		 2618 if (!hci_conn_num(hdev, ESCO_LINK))
2619 return;
2620
b6a0dc82
MH		 2621 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2622 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2623 BT_DBG("skb %p len %d", skb, skb->len);
2624 hci_send_frame(skb);
2625
2626 conn->sent++;
2627 if (conn->sent == ~0)
2628 conn->sent = 0;
2629 }
2630 }
2631}
2632
6ed58ec5
VT		 2633static inline void hci_sched_le(struct hci_dev *hdev)
2634{
73d80deb 2635 struct hci_chan *chan;
6ed58ec5 2636 struct sk_buff *skb;
02b20f0b 2637 int quote, cnt, tmp;
6ed58ec5
VT		 2638
2639 BT_DBG("%s", hdev->name);
2640
52087a79
LAD		 2641 if (!hci_conn_num(hdev, LE_LINK))
2642 return;
2643
6ed58ec5
VT		 2644 if (!test_bit(HCI_RAW, &hdev->flags)) {
2645 /* LE tx timeout must be longer than maximum
2646 * link supervision timeout (40.9 seconds) */
bae1f5d9 2647 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2648 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2649 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2650 }
2651
2652 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2653 tmp = cnt;
73d80deb 2654 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2655 u32 priority = (skb_peek(&chan->data_q))->priority;
2656 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2657 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2658 skb->len, skb->priority);
6ed58ec5 2659
ec1cce24
LAD		 2660 /* Stop if priority has changed */
2661 if (skb->priority < priority)
2662 break;
2663
2664 skb = skb_dequeue(&chan->data_q);
2665
6ed58ec5
VT		 2666 hci_send_frame(skb);
2667 hdev->le_last_tx = jiffies;
2668
2669 cnt--;
73d80deb
LAD		 2670 chan->sent++;
2671 chan->conn->sent++;
6ed58ec5
VT		 2672 }
2673 }
73d80deb 2674
6ed58ec5
VT		 2675 if (hdev->le_pkts)
2676 hdev->le_cnt = cnt;
2677 else
2678 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2679
2680 if (cnt != tmp)
2681 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2682}
2683
3eff45ea 2684static void hci_tx_work(struct work_struct *work)
1da177e4 2685{
3eff45ea 2686 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2687 struct sk_buff *skb;
2688
6ed58ec5
VT		 2689 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2690 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2691
2692 /* Schedule queues and send stuff to HCI driver */
2693
2694 hci_sched_acl(hdev);
2695
2696 hci_sched_sco(hdev);
2697
b6a0dc82
MH		 2698 hci_sched_esco(hdev);
2699
6ed58ec5
VT		 2700 hci_sched_le(hdev);
2701
1da177e4
LT		 2702 /* Send next queued raw (unknown type) packet */
2703 while ((skb = skb_dequeue(&hdev->raw_q)))
2704 hci_send_frame(skb);
1da177e4
LT		 2705}
2706
25985edc 2707/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2708
2709/* ACL data packet */
2710static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2711{
2712 struct hci_acl_hdr *hdr = (void *) skb->data;
2713 struct hci_conn *conn;
2714 __u16 handle, flags;
2715
2716 skb_pull(skb, HCI_ACL_HDR_SIZE);
2717
2718 handle = __le16_to_cpu(hdr->handle);
2719 flags = hci_flags(handle);
2720 handle = hci_handle(handle);
2721
2722 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2723
2724 hdev->stat.acl_rx++;
2725
2726 hci_dev_lock(hdev);
2727 conn = hci_conn_hash_lookup_handle(hdev, handle);
2728 hci_dev_unlock(hdev);
8e87d142 2729
1da177e4 2730 if (conn) {
65983fc7 2731 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 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",
1da177e4
LT		 2738 hdev->name, handle);
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",
1da177e4
LT		 2769 hdev->name, handle);
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
LT		 2782 while ((skb = skb_dequeue(&hdev->rx_q))) {
2783 if (atomic_read(&hdev->promisc)) {
2784 /* Send copy to the sockets */
eec8d2bc 2785 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 2786 }
2787
2788 if (test_bit(HCI_RAW, &hdev->flags)) {
2789 kfree_skb(skb);
2790 continue;
2791 }
2792
2793 if (test_bit(HCI_INIT, &hdev->flags)) {
2794 /* Don't process data packets in this states. */
0d48d939 2795 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2796 case HCI_ACLDATA_PKT:
2797 case HCI_SCODATA_PKT:
2798 kfree_skb(skb);
2799 continue;
3ff50b79 2800 }
1da177e4
LT		 2801 }
2802
2803 /* Process frame */
0d48d939 2804 switch (bt_cb(skb)->pkt_type) {
1da177e4 2805 case HCI_EVENT_PKT:
b78752cc 2806 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2807 hci_event_packet(hdev, skb);
2808 break;
2809
2810 case HCI_ACLDATA_PKT:
2811 BT_DBG("%s ACL data packet", hdev->name);
2812 hci_acldata_packet(hdev, skb);
2813 break;
2814
2815 case HCI_SCODATA_PKT:
2816 BT_DBG("%s SCO data packet", hdev->name);
2817 hci_scodata_packet(hdev, skb);
2818 break;
2819
2820 default:
2821 kfree_skb(skb);
2822 break;
2823 }
2824 }
1da177e4
LT		 2825}
2826
c347b765 2827static void hci_cmd_work(struct work_struct *work)
1da177e4 2828{
c347b765 2829 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2830 struct sk_buff *skb;
2831
2832 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2833
1da177e4 2834 /* Send queued commands */
5a08ecce
AE		 2835 if (atomic_read(&hdev->cmd_cnt)) {
2836 skb = skb_dequeue(&hdev->cmd_q);
2837 if (!skb)
2838 return;
2839
7585b97a 2840 kfree_skb(hdev->sent_cmd);
1da177e4 2841
70f23020
AE		 2842 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2843 if (hdev->sent_cmd) {
1da177e4
LT		 2844 atomic_dec(&hdev->cmd_cnt);
2845 hci_send_frame(skb);
7bdb8a5c
SJ		 2846 if (test_bit(HCI_RESET, &hdev->flags))
2847 del_timer(&hdev->cmd_timer);
2848 else
2849 mod_timer(&hdev->cmd_timer,
6bd32326 2850 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2851 } else {
2852 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2853 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2854 }
2855 }
2856}
2519a1fc
AG		 2857
2858int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2859{
2860 /* General inquiry access code (GIAC) */
2861 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2862 struct hci_cp_inquiry cp;
2863
2864 BT_DBG("%s", hdev->name);
2865
2866 if (test_bit(HCI_INQUIRY, &hdev->flags))
2867 return -EINPROGRESS;
2868
4663262c
JH		 2869 inquiry_cache_flush(hdev);
2870
2519a1fc
AG		 2871 memset(&cp, 0, sizeof(cp));
2872 memcpy(&cp.lap, lap, sizeof(cp.lap));
2873 cp.length = length;
2874
2875 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2876}
023d5049
AG		 2877
2878int hci_cancel_inquiry(struct hci_dev *hdev)
2879{
2880 BT_DBG("%s", hdev->name);
2881
2882 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2883 return -EPERM;
2884
2885 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2886}
7784d78f
AE		 2887
2888module_param(enable_hs, bool, 0644);
2889MODULE_PARM_DESC(enable_hs, "Enable High Speed");
kernel source for telekom puls (alcatel/mediatek)