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Bluetooth: Add support for notifying userspace of new LTK's
[mirror_ubuntu-bionic-kernel.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
363 if (discov->state == DISCOVERY_INQUIRY ||
364 discov->state == DISCOVERY_RESOLVING)
365 return true;
366
367 return false;
368}
369
ff9ef578
JH		 370void hci_discovery_set_state(struct hci_dev *hdev, int state)
371{
372 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
373
374 if (hdev->discovery.state == state)
375 return;
376
377 switch (state) {
378 case DISCOVERY_STOPPED:
379 mgmt_discovering(hdev, 0);
380 break;
381 case DISCOVERY_STARTING:
382 break;
30dc78e1 383 case DISCOVERY_INQUIRY:
ff9ef578
JH		 384 mgmt_discovering(hdev, 1);
385 break;
30dc78e1
JH		 386 case DISCOVERY_RESOLVING:
387 break;
ff9ef578
JH		 388 case DISCOVERY_STOPPING:
389 break;
390 }
391
392 hdev->discovery.state = state;
393}
394
1da177e4
LT		 395static void inquiry_cache_flush(struct hci_dev *hdev)
396{
30883512 397 struct discovery_state *cache = &hdev->discovery;
b57c1a56 398 struct inquiry_entry *p, *n;
1da177e4 399
561aafbc
JH		 400 list_for_each_entry_safe(p, n, &cache->all, all) {
401 list_del(&p->all);
b57c1a56 402 kfree(p);
1da177e4 403 }
561aafbc
JH		 404
405 INIT_LIST_HEAD(&cache->unknown);
406 INIT_LIST_HEAD(&cache->resolve);
ff9ef578 407 cache->state = DISCOVERY_STOPPED;
1da177e4
LT		 408}
409
410struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
411{
30883512 412 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 413 struct inquiry_entry *e;
414
415 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
416
561aafbc
JH		 417 list_for_each_entry(e, &cache->all, all) {
418 if (!bacmp(&e->data.bdaddr, bdaddr))
419 return e;
420 }
421
422 return NULL;
423}
424
425struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
426 bdaddr_t *bdaddr)
427{
30883512 428 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 429 struct inquiry_entry *e;
430
431 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
432
433 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 434 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 435 return e;
436 }
437
438 return NULL;
1da177e4
LT		 439}
440
30dc78e1
JH		 441struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
442 bdaddr_t *bdaddr,
443 int state)
444{
445 struct discovery_state *cache = &hdev->discovery;
446 struct inquiry_entry *e;
447
448 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
449
450 list_for_each_entry(e, &cache->resolve, list) {
451 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
452 return e;
453 if (!bacmp(&e->data.bdaddr, bdaddr))
454 return e;
455 }
456
457 return NULL;
458}
459
a3d4e20a
JH		 460void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
461 struct inquiry_entry *ie)
462{
463 struct discovery_state *cache = &hdev->discovery;
464 struct list_head *pos = &cache->resolve;
465 struct inquiry_entry *p;
466
467 list_del(&ie->list);
468
469 list_for_each_entry(p, &cache->resolve, list) {
470 if (p->name_state != NAME_PENDING &&
471 abs(p->data.rssi) >= abs(ie->data.rssi))
472 break;
473 pos = &p->list;
474 }
475
476 list_add(&ie->list, pos);
477}
478
3175405b 479bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
561aafbc 480 bool name_known)
1da177e4 481{
30883512 482 struct discovery_state *cache = &hdev->discovery;
70f23020 483 struct inquiry_entry *ie;
1da177e4
LT		 484
485 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
486
70f23020 487 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a
JH		 488 if (ie) {
489 if (ie->name_state == NAME_NEEDED &&
490 data->rssi != ie->data.rssi) {
491 ie->data.rssi = data->rssi;
492 hci_inquiry_cache_update_resolve(hdev, ie);
493 }
494
561aafbc 495 goto update;
a3d4e20a 496 }
561aafbc
JH		 497
498 /* Entry not in the cache. Add new one. */
499 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
500 if (!ie)
3175405b 501 return false;
561aafbc
JH		 502
503 list_add(&ie->all, &cache->all);
504
505 if (name_known) {
506 ie->name_state = NAME_KNOWN;
507 } else {
508 ie->name_state = NAME_NOT_KNOWN;
509 list_add(&ie->list, &cache->unknown);
510 }
70f23020 511
561aafbc
JH		 512update:
513 if (name_known && ie->name_state != NAME_KNOWN &&
514 ie->name_state != NAME_PENDING) {
515 ie->name_state = NAME_KNOWN;
516 list_del(&ie->list);
1da177e4
LT		 517 }
518
70f23020
AE		 519 memcpy(&ie->data, data, sizeof(*data));
520 ie->timestamp = jiffies;
1da177e4 521 cache->timestamp = jiffies;
3175405b
JH		 522
523 if (ie->name_state == NAME_NOT_KNOWN)
524 return false;
525
526 return true;
1da177e4
LT		 527}
528
529static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
530{
30883512 531 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 532 struct inquiry_info *info = (struct inquiry_info *) buf;
533 struct inquiry_entry *e;
534 int copied = 0;
535
561aafbc 536 list_for_each_entry(e, &cache->all, all) {
1da177e4 537 struct inquiry_data *data = &e->data;
b57c1a56
JH		 538
539 if (copied >= num)
540 break;
541
1da177e4
LT		 542 bacpy(&info->bdaddr, &data->bdaddr);
543 info->pscan_rep_mode = data->pscan_rep_mode;
544 info->pscan_period_mode = data->pscan_period_mode;
545 info->pscan_mode = data->pscan_mode;
546 memcpy(info->dev_class, data->dev_class, 3);
547 info->clock_offset = data->clock_offset;
b57c1a56 548
1da177e4 549 info++;
b57c1a56 550 copied++;
1da177e4
LT		 551 }
552
553 BT_DBG("cache %p, copied %d", cache, copied);
554 return copied;
555}
556
557static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
558{
559 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
560 struct hci_cp_inquiry cp;
561
562 BT_DBG("%s", hdev->name);
563
564 if (test_bit(HCI_INQUIRY, &hdev->flags))
565 return;
566
567 /* Start Inquiry */
568 memcpy(&cp.lap, &ir->lap, 3);
569 cp.length = ir->length;
570 cp.num_rsp = ir->num_rsp;
a9de9248 571 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 572}
573
574int hci_inquiry(void __user *arg)
575{
576 __u8 __user *ptr = arg;
577 struct hci_inquiry_req ir;
578 struct hci_dev *hdev;
579 int err = 0, do_inquiry = 0, max_rsp;
580 long timeo;
581 __u8 *buf;
582
583 if (copy_from_user(&ir, ptr, sizeof(ir)))
584 return -EFAULT;
585
5a08ecce
AE		 586 hdev = hci_dev_get(ir.dev_id);
587 if (!hdev)
1da177e4
LT		 588 return -ENODEV;
589
09fd0de5 590 hci_dev_lock(hdev);
8e87d142 591 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 592 inquiry_cache_empty(hdev) ||
593 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 594 inquiry_cache_flush(hdev);
595 do_inquiry = 1;
596 }
09fd0de5 597 hci_dev_unlock(hdev);
1da177e4 598
04837f64 599 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 600
601 if (do_inquiry) {
602 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
603 if (err < 0)
604 goto done;
605 }
1da177e4
LT		 606
607 /* for unlimited number of responses we will use buffer with 255 entries */
608 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
609
610 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
611 * copy it to the user space.
612 */
01df8c31 613 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 614 if (!buf) {
1da177e4
LT		 615 err = -ENOMEM;
616 goto done;
617 }
618
09fd0de5 619 hci_dev_lock(hdev);
1da177e4 620 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 621 hci_dev_unlock(hdev);
1da177e4
LT		 622
623 BT_DBG("num_rsp %d", ir.num_rsp);
624
625 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
626 ptr += sizeof(ir);
627 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
628 ir.num_rsp))
629 err = -EFAULT;
8e87d142 630 } else
1da177e4
LT		 631 err = -EFAULT;
632
633 kfree(buf);
634
635done:
636 hci_dev_put(hdev);
637 return err;
638}
639
640/* ---- HCI ioctl helpers ---- */
641
642int hci_dev_open(__u16 dev)
643{
644 struct hci_dev *hdev;
645 int ret = 0;
646
5a08ecce
AE		 647 hdev = hci_dev_get(dev);
648 if (!hdev)
1da177e4
LT		 649 return -ENODEV;
650
651 BT_DBG("%s %p", hdev->name, hdev);
652
653 hci_req_lock(hdev);
654
611b30f7
MH		 655 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
656 ret = -ERFKILL;
657 goto done;
658 }
659
1da177e4
LT		 660 if (test_bit(HCI_UP, &hdev->flags)) {
661 ret = -EALREADY;
662 goto done;
663 }
664
665 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
666 set_bit(HCI_RAW, &hdev->flags);
667
07e3b94a
AE		 668 /* Treat all non BR/EDR controllers as raw devices if
669 enable_hs is not set */
670 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 671 set_bit(HCI_RAW, &hdev->flags);
672
1da177e4
LT		 673 if (hdev->open(hdev)) {
674 ret = -EIO;
675 goto done;
676 }
677
678 if (!test_bit(HCI_RAW, &hdev->flags)) {
679 atomic_set(&hdev->cmd_cnt, 1);
680 set_bit(HCI_INIT, &hdev->flags);
a5040efa 681 hdev->init_last_cmd = 0;
1da177e4 682
04837f64
MH		 683 ret = __hci_request(hdev, hci_init_req, 0,
684 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 685
eead27da 686 if (lmp_host_le_capable(hdev))
6ed58ec5
VT		 687 ret = __hci_request(hdev, hci_le_init_req, 0,
688 msecs_to_jiffies(HCI_INIT_TIMEOUT));
689
1da177e4
LT		 690 clear_bit(HCI_INIT, &hdev->flags);
691 }
692
693 if (!ret) {
694 hci_dev_hold(hdev);
695 set_bit(HCI_UP, &hdev->flags);
696 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 697 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 698 hci_dev_lock(hdev);
744cf19e 699 mgmt_powered(hdev, 1);
09fd0de5 700 hci_dev_unlock(hdev);
56e5cb86 701 }
8e87d142 702 } else {
1da177e4 703 /* Init failed, cleanup */
3eff45ea 704 flush_work(&hdev->tx_work);
c347b765 705 flush_work(&hdev->cmd_work);
b78752cc 706 flush_work(&hdev->rx_work);
1da177e4
LT		 707
708 skb_queue_purge(&hdev->cmd_q);
709 skb_queue_purge(&hdev->rx_q);
710
711 if (hdev->flush)
712 hdev->flush(hdev);
713
714 if (hdev->sent_cmd) {
715 kfree_skb(hdev->sent_cmd);
716 hdev->sent_cmd = NULL;
717 }
718
719 hdev->close(hdev);
720 hdev->flags = 0;
721 }
722
723done:
724 hci_req_unlock(hdev);
725 hci_dev_put(hdev);
726 return ret;
727}
728
729static int hci_dev_do_close(struct hci_dev *hdev)
730{
731 BT_DBG("%s %p", hdev->name, hdev);
732
733 hci_req_cancel(hdev, ENODEV);
734 hci_req_lock(hdev);
735
736 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 737 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 738 hci_req_unlock(hdev);
739 return 0;
740 }
741
3eff45ea
GP		 742 /* Flush RX and TX works */
743 flush_work(&hdev->tx_work);
b78752cc 744 flush_work(&hdev->rx_work);
1da177e4 745
16ab91ab 746 if (hdev->discov_timeout > 0) {
e0f9309f 747 cancel_delayed_work(&hdev->discov_off);
16ab91ab
JH		 748 hdev->discov_timeout = 0;
749 }
750
a8b2d5c2 751 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 752 cancel_delayed_work(&hdev->power_off);
3243553f 753
a8b2d5c2 754 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 755 cancel_delayed_work(&hdev->service_cache);
756
09fd0de5 757 hci_dev_lock(hdev);
1da177e4
LT		 758 inquiry_cache_flush(hdev);
759 hci_conn_hash_flush(hdev);
09fd0de5 760 hci_dev_unlock(hdev);
1da177e4
LT		 761
762 hci_notify(hdev, HCI_DEV_DOWN);
763
764 if (hdev->flush)
765 hdev->flush(hdev);
766
767 /* Reset device */
768 skb_queue_purge(&hdev->cmd_q);
769 atomic_set(&hdev->cmd_cnt, 1);
770 if (!test_bit(HCI_RAW, &hdev->flags)) {
771 set_bit(HCI_INIT, &hdev->flags);
04837f64 772 __hci_request(hdev, hci_reset_req, 0,
cad44c2b 773 msecs_to_jiffies(250));
1da177e4
LT		 774 clear_bit(HCI_INIT, &hdev->flags);
775 }
776
c347b765
GP		 777 /* flush cmd work */
778 flush_work(&hdev->cmd_work);
1da177e4
LT		 779
780 /* Drop queues */
781 skb_queue_purge(&hdev->rx_q);
782 skb_queue_purge(&hdev->cmd_q);
783 skb_queue_purge(&hdev->raw_q);
784
785 /* Drop last sent command */
786 if (hdev->sent_cmd) {
b79f44c1 787 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 788 kfree_skb(hdev->sent_cmd);
789 hdev->sent_cmd = NULL;
790 }
791
792 /* After this point our queues are empty
793 * and no tasks are scheduled. */
794 hdev->close(hdev);
795
09fd0de5 796 hci_dev_lock(hdev);
744cf19e 797 mgmt_powered(hdev, 0);
09fd0de5 798 hci_dev_unlock(hdev);
5add6af8 799
1da177e4
LT		 800 /* Clear flags */
801 hdev->flags = 0;
802
803 hci_req_unlock(hdev);
804
805 hci_dev_put(hdev);
806 return 0;
807}
808
809int hci_dev_close(__u16 dev)
810{
811 struct hci_dev *hdev;
812 int err;
813
70f23020
AE		 814 hdev = hci_dev_get(dev);
815 if (!hdev)
1da177e4
LT		 816 return -ENODEV;
817 err = hci_dev_do_close(hdev);
818 hci_dev_put(hdev);
819 return err;
820}
821
822int hci_dev_reset(__u16 dev)
823{
824 struct hci_dev *hdev;
825 int ret = 0;
826
70f23020
AE		 827 hdev = hci_dev_get(dev);
828 if (!hdev)
1da177e4
LT		 829 return -ENODEV;
830
831 hci_req_lock(hdev);
1da177e4
LT		 832
833 if (!test_bit(HCI_UP, &hdev->flags))
834 goto done;
835
836 /* Drop queues */
837 skb_queue_purge(&hdev->rx_q);
838 skb_queue_purge(&hdev->cmd_q);
839
09fd0de5 840 hci_dev_lock(hdev);
1da177e4
LT		 841 inquiry_cache_flush(hdev);
842 hci_conn_hash_flush(hdev);
09fd0de5 843 hci_dev_unlock(hdev);
1da177e4
LT		 844
845 if (hdev->flush)
846 hdev->flush(hdev);
847
8e87d142 848 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 849 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 850
851 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 852 ret = __hci_request(hdev, hci_reset_req, 0,
853 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 854
855done:
1da177e4
LT		 856 hci_req_unlock(hdev);
857 hci_dev_put(hdev);
858 return ret;
859}
860
861int hci_dev_reset_stat(__u16 dev)
862{
863 struct hci_dev *hdev;
864 int ret = 0;
865
70f23020
AE		 866 hdev = hci_dev_get(dev);
867 if (!hdev)
1da177e4
LT		 868 return -ENODEV;
869
870 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
871
872 hci_dev_put(hdev);
873
874 return ret;
875}
876
877int hci_dev_cmd(unsigned int cmd, void __user *arg)
878{
879 struct hci_dev *hdev;
880 struct hci_dev_req dr;
881 int err = 0;
882
883 if (copy_from_user(&dr, arg, sizeof(dr)))
884 return -EFAULT;
885
70f23020
AE		 886 hdev = hci_dev_get(dr.dev_id);
887 if (!hdev)
1da177e4
LT		 888 return -ENODEV;
889
890 switch (cmd) {
891 case HCISETAUTH:
04837f64
MH		 892 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
893 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 894 break;
895
896 case HCISETENCRYPT:
897 if (!lmp_encrypt_capable(hdev)) {
898 err = -EOPNOTSUPP;
899 break;
900 }
901
902 if (!test_bit(HCI_AUTH, &hdev->flags)) {
903 /* Auth must be enabled first */
04837f64
MH		 904 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
905 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 906 if (err)
907 break;
908 }
909
04837f64
MH		 910 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
911 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 912 break;
913
914 case HCISETSCAN:
04837f64
MH		 915 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
916 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 917 break;
918
1da177e4 919 case HCISETLINKPOL:
e4e8e37c
MH		 920 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
921 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 922 break;
923
924 case HCISETLINKMODE:
e4e8e37c
MH		 925 hdev->link_mode = ((__u16) dr.dev_opt) &
926 (HCI_LM_MASTER | HCI_LM_ACCEPT);
927 break;
928
929 case HCISETPTYPE:
930 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 931 break;
932
933 case HCISETACLMTU:
e4e8e37c
MH		 934 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
935 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 936 break;
937
938 case HCISETSCOMTU:
e4e8e37c
MH		 939 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
940 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 941 break;
942
943 default:
944 err = -EINVAL;
945 break;
946 }
e4e8e37c 947
1da177e4
LT		 948 hci_dev_put(hdev);
949 return err;
950}
951
952int hci_get_dev_list(void __user *arg)
953{
8035ded4 954 struct hci_dev *hdev;
1da177e4
LT		 955 struct hci_dev_list_req *dl;
956 struct hci_dev_req *dr;
1da177e4
LT		 957 int n = 0, size, err;
958 __u16 dev_num;
959
960 if (get_user(dev_num, (__u16 __user *) arg))
961 return -EFAULT;
962
963 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
964 return -EINVAL;
965
966 size = sizeof(*dl) + dev_num * sizeof(*dr);
967
70f23020
AE		 968 dl = kzalloc(size, GFP_KERNEL);
969 if (!dl)
1da177e4
LT		 970 return -ENOMEM;
971
972 dr = dl->dev_req;
973
f20d09d5 974 read_lock(&hci_dev_list_lock);
8035ded4 975 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 976 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 977 cancel_delayed_work(&hdev->power_off);
c542a06c 978
a8b2d5c2
JH		 979 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
980 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 981
1da177e4
LT		 982 (dr + n)->dev_id = hdev->id;
983 (dr + n)->dev_opt = hdev->flags;
c542a06c 984
1da177e4
LT		 985 if (++n >= dev_num)
986 break;
987 }
f20d09d5 988 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 989
990 dl->dev_num = n;
991 size = sizeof(*dl) + n * sizeof(*dr);
992
993 err = copy_to_user(arg, dl, size);
994 kfree(dl);
995
996 return err ? -EFAULT : 0;
997}
998
999int hci_get_dev_info(void __user *arg)
1000{
1001 struct hci_dev *hdev;
1002 struct hci_dev_info di;
1003 int err = 0;
1004
1005 if (copy_from_user(&di, arg, sizeof(di)))
1006 return -EFAULT;
1007
70f23020
AE		 1008 hdev = hci_dev_get(di.dev_id);
1009 if (!hdev)
1da177e4
LT		 1010 return -ENODEV;
1011
a8b2d5c2 1012 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1013 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1014
a8b2d5c2
JH		 1015 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1016 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1017
1da177e4
LT		 1018 strcpy(di.name, hdev->name);
1019 di.bdaddr = hdev->bdaddr;
943da25d 1020 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1021 di.flags = hdev->flags;
1022 di.pkt_type = hdev->pkt_type;
1023 di.acl_mtu = hdev->acl_mtu;
1024 di.acl_pkts = hdev->acl_pkts;
1025 di.sco_mtu = hdev->sco_mtu;
1026 di.sco_pkts = hdev->sco_pkts;
1027 di.link_policy = hdev->link_policy;
1028 di.link_mode = hdev->link_mode;
1029
1030 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1031 memcpy(&di.features, &hdev->features, sizeof(di.features));
1032
1033 if (copy_to_user(arg, &di, sizeof(di)))
1034 err = -EFAULT;
1035
1036 hci_dev_put(hdev);
1037
1038 return err;
1039}
1040
1041/* ---- Interface to HCI drivers ---- */
1042
611b30f7
MH		 1043static int hci_rfkill_set_block(void *data, bool blocked)
1044{
1045 struct hci_dev *hdev = data;
1046
1047 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1048
1049 if (!blocked)
1050 return 0;
1051
1052 hci_dev_do_close(hdev);
1053
1054 return 0;
1055}
1056
1057static const struct rfkill_ops hci_rfkill_ops = {
1058 .set_block = hci_rfkill_set_block,
1059};
1060
1da177e4
LT		 1061/* Alloc HCI device */
1062struct hci_dev *hci_alloc_dev(void)
1063{
1064 struct hci_dev *hdev;
1065
25ea6db0 1066 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1da177e4
LT		 1067 if (!hdev)
1068 return NULL;
1069
0ac7e700 1070 hci_init_sysfs(hdev);
1da177e4
LT		 1071 skb_queue_head_init(&hdev->driver_init);
1072
1073 return hdev;
1074}
1075EXPORT_SYMBOL(hci_alloc_dev);
1076
1077/* Free HCI device */
1078void hci_free_dev(struct hci_dev *hdev)
1079{
1080 skb_queue_purge(&hdev->driver_init);
1081
a91f2e39
MH		 1082 /* will free via device release */
1083 put_device(&hdev->dev);
1da177e4
LT		 1084}
1085EXPORT_SYMBOL(hci_free_dev);
1086
ab81cbf9
JH		 1087static void hci_power_on(struct work_struct *work)
1088{
1089 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1090
1091 BT_DBG("%s", hdev->name);
1092
1093 if (hci_dev_open(hdev->id) < 0)
1094 return;
1095
a8b2d5c2 1096 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1097 schedule_delayed_work(&hdev->power_off,
3243553f 1098 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1099
a8b2d5c2 1100 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1101 mgmt_index_added(hdev);
ab81cbf9
JH		 1102}
1103
1104static void hci_power_off(struct work_struct *work)
1105{
3243553f
JH		 1106 struct hci_dev *hdev = container_of(work, struct hci_dev,
1107 power_off.work);
ab81cbf9
JH		 1108
1109 BT_DBG("%s", hdev->name);
1110
a8b2d5c2 1111 clear_bit(HCI_AUTO_OFF, &hdev->dev_flags);
ab81cbf9 1112
3243553f 1113 hci_dev_close(hdev->id);
ab81cbf9
JH		 1114}
1115
16ab91ab
JH		 1116static void hci_discov_off(struct work_struct *work)
1117{
1118 struct hci_dev *hdev;
1119 u8 scan = SCAN_PAGE;
1120
1121 hdev = container_of(work, struct hci_dev, discov_off.work);
1122
1123 BT_DBG("%s", hdev->name);
1124
09fd0de5 1125 hci_dev_lock(hdev);
16ab91ab
JH		 1126
1127 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1128
1129 hdev->discov_timeout = 0;
1130
09fd0de5 1131 hci_dev_unlock(hdev);
16ab91ab
JH		 1132}
1133
2aeb9a1a
JH		 1134int hci_uuids_clear(struct hci_dev *hdev)
1135{
1136 struct list_head *p, *n;
1137
1138 list_for_each_safe(p, n, &hdev->uuids) {
1139 struct bt_uuid *uuid;
1140
1141 uuid = list_entry(p, struct bt_uuid, list);
1142
1143 list_del(p);
1144 kfree(uuid);
1145 }
1146
1147 return 0;
1148}
1149
55ed8ca1
JH		 1150int hci_link_keys_clear(struct hci_dev *hdev)
1151{
1152 struct list_head *p, *n;
1153
1154 list_for_each_safe(p, n, &hdev->link_keys) {
1155 struct link_key *key;
1156
1157 key = list_entry(p, struct link_key, list);
1158
1159 list_del(p);
1160 kfree(key);
1161 }
1162
1163 return 0;
1164}
1165
b899efaf
VCG		 1166int hci_smp_ltks_clear(struct hci_dev *hdev)
1167{
1168 struct smp_ltk *k, *tmp;
1169
1170 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1171 list_del(&k->list);
1172 kfree(k);
1173 }
1174
1175 return 0;
1176}
1177
55ed8ca1
JH		 1178struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1179{
8035ded4 1180 struct link_key *k;
55ed8ca1 1181
8035ded4 1182 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1183 if (bacmp(bdaddr, &k->bdaddr) == 0)
1184 return k;
55ed8ca1
JH		 1185
1186 return NULL;
1187}
1188
d25e28ab
JH		 1189static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1190 u8 key_type, u8 old_key_type)
1191{
1192 /* Legacy key */
1193 if (key_type < 0x03)
1194 return 1;
1195
1196 /* Debug keys are insecure so don't store them persistently */
1197 if (key_type == HCI_LK_DEBUG_COMBINATION)
1198 return 0;
1199
1200 /* Changed combination key and there's no previous one */
1201 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1202 return 0;
1203
1204 /* Security mode 3 case */
1205 if (!conn)
1206 return 1;
1207
1208 /* Neither local nor remote side had no-bonding as requirement */
1209 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1210 return 1;
1211
1212 /* Local side had dedicated bonding as requirement */
1213 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1214 return 1;
1215
1216 /* Remote side had dedicated bonding as requirement */
1217 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1218 return 1;
1219
1220 /* If none of the above criteria match, then don't store the key
1221 * persistently */
1222 return 0;
1223}
1224
c9839a11 1225struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1226{
c9839a11 1227 struct smp_ltk *k;
75d262c2 1228
c9839a11
VCG		 1229 list_for_each_entry(k, &hdev->long_term_keys, list) {
1230 if (k->ediv != ediv ||
1231 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1232 continue;
1233
c9839a11 1234 return k;
75d262c2
VCG		 1235 }
1236
1237 return NULL;
1238}
1239EXPORT_SYMBOL(hci_find_ltk);
1240
c9839a11
VCG		 1241struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1242 u8 addr_type)
75d262c2 1243{
c9839a11 1244 struct smp_ltk *k;
75d262c2 1245
c9839a11
VCG		 1246 list_for_each_entry(k, &hdev->long_term_keys, list)
1247 if (addr_type == k->bdaddr_type &&
1248 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1249 return k;
1250
1251 return NULL;
1252}
c9839a11 1253EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1254
d25e28ab
JH		 1255int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1256 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1257{
1258 struct link_key *key, *old_key;
4df378a1 1259 u8 old_key_type, persistent;
55ed8ca1
JH		 1260
1261 old_key = hci_find_link_key(hdev, bdaddr);
1262 if (old_key) {
1263 old_key_type = old_key->type;
1264 key = old_key;
1265 } else {
12adcf3a 1266 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1267 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1268 if (!key)
1269 return -ENOMEM;
1270 list_add(&key->list, &hdev->link_keys);
1271 }
1272
1273 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1274
d25e28ab
JH		 1275 /* Some buggy controller combinations generate a changed
1276 * combination key for legacy pairing even when there's no
1277 * previous key */
1278 if (type == HCI_LK_CHANGED_COMBINATION &&
1279 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1280 old_key_type == 0xff) {
d25e28ab 1281 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1282 if (conn)
1283 conn->key_type = type;
1284 }
d25e28ab 1285
55ed8ca1
JH		 1286 bacpy(&key->bdaddr, bdaddr);
1287 memcpy(key->val, val, 16);
55ed8ca1
JH		 1288 key->pin_len = pin_len;
1289
b6020ba0 1290 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1291 key->type = old_key_type;
4748fed2
JH		 1292 else
1293 key->type = type;
1294
4df378a1
JH		 1295 if (!new_key)
1296 return 0;
1297
1298 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1299
744cf19e 1300 mgmt_new_link_key(hdev, key, persistent);
4df378a1
JH		 1301
1302 if (!persistent) {
1303 list_del(&key->list);
1304 kfree(key);
1305 }
55ed8ca1
JH		 1306
1307 return 0;
1308}
1309
c9839a11
VCG		 1310int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1311 int new_key, u8 authenticated, u8 tk[16],
1312 u8 enc_size, u16 ediv, u8 rand[8])
75d262c2 1313{
c9839a11 1314 struct smp_ltk *key, *old_key;
75d262c2 1315
c9839a11
VCG		 1316 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1317 return 0;
75d262c2 1318
c9839a11
VCG		 1319 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1320 if (old_key)
75d262c2 1321 key = old_key;
c9839a11
VCG		 1322 else {
1323 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1324 if (!key)
1325 return -ENOMEM;
c9839a11 1326 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1327 }
1328
75d262c2 1329 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1330 key->bdaddr_type = addr_type;
1331 memcpy(key->val, tk, sizeof(key->val));
1332 key->authenticated = authenticated;
1333 key->ediv = ediv;
1334 key->enc_size = enc_size;
1335 key->type = type;
1336 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1337
c9839a11
VCG		 1338 if (!new_key)
1339 return 0;
75d262c2 1340
261cc5aa
VCG		 1341 if (type & HCI_SMP_LTK)
1342 mgmt_new_ltk(hdev, key, 1);
1343
75d262c2
VCG		 1344 return 0;
1345}
1346
55ed8ca1
JH		 1347int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1348{
1349 struct link_key *key;
1350
1351 key = hci_find_link_key(hdev, bdaddr);
1352 if (!key)
1353 return -ENOENT;
1354
1355 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1356
1357 list_del(&key->list);
1358 kfree(key);
1359
1360 return 0;
1361}
1362
b899efaf
VCG		 1363int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1364{
1365 struct smp_ltk *k, *tmp;
1366
1367 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1368 if (bacmp(bdaddr, &k->bdaddr))
1369 continue;
1370
1371 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1372
1373 list_del(&k->list);
1374 kfree(k);
1375 }
1376
1377 return 0;
1378}
1379
6bd32326
VT		 1380/* HCI command timer function */
1381static void hci_cmd_timer(unsigned long arg)
1382{
1383 struct hci_dev *hdev = (void *) arg;
1384
1385 BT_ERR("%s command tx timeout", hdev->name);
1386 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1387 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1388}
1389
2763eda6
SJ		 1390struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1391 bdaddr_t *bdaddr)
1392{
1393 struct oob_data *data;
1394
1395 list_for_each_entry(data, &hdev->remote_oob_data, list)
1396 if (bacmp(bdaddr, &data->bdaddr) == 0)
1397 return data;
1398
1399 return NULL;
1400}
1401
1402int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1403{
1404 struct oob_data *data;
1405
1406 data = hci_find_remote_oob_data(hdev, bdaddr);
1407 if (!data)
1408 return -ENOENT;
1409
1410 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1411
1412 list_del(&data->list);
1413 kfree(data);
1414
1415 return 0;
1416}
1417
1418int hci_remote_oob_data_clear(struct hci_dev *hdev)
1419{
1420 struct oob_data *data, *n;
1421
1422 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1423 list_del(&data->list);
1424 kfree(data);
1425 }
1426
1427 return 0;
1428}
1429
1430int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1431 u8 *randomizer)
1432{
1433 struct oob_data *data;
1434
1435 data = hci_find_remote_oob_data(hdev, bdaddr);
1436
1437 if (!data) {
1438 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1439 if (!data)
1440 return -ENOMEM;
1441
1442 bacpy(&data->bdaddr, bdaddr);
1443 list_add(&data->list, &hdev->remote_oob_data);
1444 }
1445
1446 memcpy(data->hash, hash, sizeof(data->hash));
1447 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1448
1449 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1450
1451 return 0;
1452}
1453
b2a66aad
AJ		 1454struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev,
1455 bdaddr_t *bdaddr)
1456{
8035ded4 1457 struct bdaddr_list *b;
b2a66aad 1458
8035ded4 1459 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1460 if (bacmp(bdaddr, &b->bdaddr) == 0)
1461 return b;
b2a66aad
AJ		 1462
1463 return NULL;
1464}
1465
1466int hci_blacklist_clear(struct hci_dev *hdev)
1467{
1468 struct list_head *p, *n;
1469
1470 list_for_each_safe(p, n, &hdev->blacklist) {
1471 struct bdaddr_list *b;
1472
1473 b = list_entry(p, struct bdaddr_list, list);
1474
1475 list_del(p);
1476 kfree(b);
1477 }
1478
1479 return 0;
1480}
1481
1482int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr)
1483{
1484 struct bdaddr_list *entry;
b2a66aad
AJ		 1485
1486 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1487 return -EBADF;
1488
5e762444
AJ		 1489 if (hci_blacklist_lookup(hdev, bdaddr))
1490 return -EEXIST;
b2a66aad
AJ		 1491
1492 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1493 if (!entry)
1494 return -ENOMEM;
b2a66aad
AJ		 1495
1496 bacpy(&entry->bdaddr, bdaddr);
1497
1498 list_add(&entry->list, &hdev->blacklist);
1499
744cf19e 1500 return mgmt_device_blocked(hdev, bdaddr);
b2a66aad
AJ		 1501}
1502
1503int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr)
1504{
1505 struct bdaddr_list *entry;
b2a66aad 1506
1ec918ce 1507 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1508 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1509
1510 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1511 if (!entry)
5e762444 1512 return -ENOENT;
b2a66aad
AJ		 1513
1514 list_del(&entry->list);
1515 kfree(entry);
1516
744cf19e 1517 return mgmt_device_unblocked(hdev, bdaddr);
b2a66aad
AJ		 1518}
1519
db323f2f 1520static void hci_clear_adv_cache(struct work_struct *work)
35815085 1521{
db323f2f
GP		 1522 struct hci_dev *hdev = container_of(work, struct hci_dev,
1523 adv_work.work);
35815085
AG		 1524
1525 hci_dev_lock(hdev);
1526
1527 hci_adv_entries_clear(hdev);
1528
1529 hci_dev_unlock(hdev);
1530}
1531
76c8686f
AG		 1532int hci_adv_entries_clear(struct hci_dev *hdev)
1533{
1534 struct adv_entry *entry, *tmp;
1535
1536 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1537 list_del(&entry->list);
1538 kfree(entry);
1539 }
1540
1541 BT_DBG("%s adv cache cleared", hdev->name);
1542
1543 return 0;
1544}
1545
1546struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1547{
1548 struct adv_entry *entry;
1549
1550 list_for_each_entry(entry, &hdev->adv_entries, list)
1551 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1552 return entry;
1553
1554 return NULL;
1555}
1556
1557static inline int is_connectable_adv(u8 evt_type)
1558{
1559 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1560 return 1;
1561
1562 return 0;
1563}
1564
1565int hci_add_adv_entry(struct hci_dev *hdev,
1566 struct hci_ev_le_advertising_info *ev)
1567{
1568 struct adv_entry *entry;
1569
1570 if (!is_connectable_adv(ev->evt_type))
1571 return -EINVAL;
1572
1573 /* Only new entries should be added to adv_entries. So, if
1574 * bdaddr was found, don't add it. */
1575 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1576 return 0;
1577
4777bfde 1578 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
76c8686f
AG		 1579 if (!entry)
1580 return -ENOMEM;
1581
1582 bacpy(&entry->bdaddr, &ev->bdaddr);
1583 entry->bdaddr_type = ev->bdaddr_type;
1584
1585 list_add(&entry->list, &hdev->adv_entries);
1586
1587 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1588 batostr(&entry->bdaddr), entry->bdaddr_type);
1589
1590 return 0;
1591}
1592
1da177e4
LT		 1593/* Register HCI device */
1594int hci_register_dev(struct hci_dev *hdev)
1595{
1596 struct list_head *head = &hci_dev_list, *p;
08add513 1597 int i, id, error;
1da177e4 1598
e9b9cfa1 1599 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1600
010666a1 1601 if (!hdev->open || !hdev->close)
1da177e4
LT		 1602 return -EINVAL;
1603
08add513
MM		 1604 /* Do not allow HCI_AMP devices to register at index 0,
1605 * so the index can be used as the AMP controller ID.
1606 */
1607 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
1608
f20d09d5 1609 write_lock(&hci_dev_list_lock);
1da177e4
LT		 1610
1611 /* Find first available device id */
1612 list_for_each(p, &hci_dev_list) {
1613 if (list_entry(p, struct hci_dev, list)->id != id)
1614 break;
1615 head = p; id++;
1616 }
8e87d142 1617
1da177e4
LT		 1618 sprintf(hdev->name, "hci%d", id);
1619 hdev->id = id;
c6feeb28 1620 list_add_tail(&hdev->list, head);
1da177e4 1621
09fd0de5 1622 mutex_init(&hdev->lock);
1da177e4
LT		 1623
1624 hdev->flags = 0;
d23264a8 1625 hdev->dev_flags = 0;
1da177e4 1626 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
5b7f9909 1627 hdev->esco_type = (ESCO_HV1);
1da177e4 1628 hdev->link_mode = (HCI_LM_ACCEPT);
17fa4b9d 1629 hdev->io_capability = 0x03; /* No Input No Output */
1da177e4 1630
04837f64
MH		 1631 hdev->idle_timeout = 0;
1632 hdev->sniff_max_interval = 800;
1633 hdev->sniff_min_interval = 80;
1634
b78752cc 1635 INIT_WORK(&hdev->rx_work, hci_rx_work);
c347b765 1636 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3eff45ea 1637 INIT_WORK(&hdev->tx_work, hci_tx_work);
b78752cc 1638
1da177e4
LT		 1639
1640 skb_queue_head_init(&hdev->rx_q);
1641 skb_queue_head_init(&hdev->cmd_q);
1642 skb_queue_head_init(&hdev->raw_q);
1643
6bd32326
VT		 1644 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1645
cd4c5391 1646 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1647 hdev->reassembly[i] = NULL;
1648
1da177e4 1649 init_waitqueue_head(&hdev->req_wait_q);
a6a67efd 1650 mutex_init(&hdev->req_lock);
1da177e4 1651
30883512 1652 discovery_init(hdev);
1da177e4
LT		 1653
1654 hci_conn_hash_init(hdev);
1655
2e58ef3e
JH		 1656 INIT_LIST_HEAD(&hdev->mgmt_pending);
1657
ea4bd8ba 1658 INIT_LIST_HEAD(&hdev->blacklist);
f0358568 1659
2aeb9a1a
JH		 1660 INIT_LIST_HEAD(&hdev->uuids);
1661
55ed8ca1 1662 INIT_LIST_HEAD(&hdev->link_keys);
b899efaf 1663 INIT_LIST_HEAD(&hdev->long_term_keys);
55ed8ca1 1664
2763eda6
SJ		 1665 INIT_LIST_HEAD(&hdev->remote_oob_data);
1666
76c8686f
AG		 1667 INIT_LIST_HEAD(&hdev->adv_entries);
1668
db323f2f 1669 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
ab81cbf9 1670 INIT_WORK(&hdev->power_on, hci_power_on);
3243553f 1671 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
ab81cbf9 1672
16ab91ab
JH		 1673 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1674
1da177e4
LT		 1675 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1676
1677 atomic_set(&hdev->promisc, 0);
1678
f20d09d5 1679 write_unlock(&hci_dev_list_lock);
1da177e4 1680
32845eb1
GP		 1681 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1682 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1683 if (!hdev->workqueue) {
1684 error = -ENOMEM;
1685 goto err;
1686 }
f48fd9c8 1687
33ca954d
DH		 1688 error = hci_add_sysfs(hdev);
1689 if (error < 0)
1690 goto err_wqueue;
1da177e4 1691
611b30f7
MH		 1692 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1693 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1694 if (hdev->rfkill) {
1695 if (rfkill_register(hdev->rfkill) < 0) {
1696 rfkill_destroy(hdev->rfkill);
1697 hdev->rfkill = NULL;
1698 }
1699 }
1700
a8b2d5c2
JH		 1701 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1702 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1703 schedule_work(&hdev->power_on);
ab81cbf9 1704
1da177e4 1705 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1706 hci_dev_hold(hdev);
1da177e4
LT		 1707
1708 return id;
f48fd9c8 1709
33ca954d
DH		 1710err_wqueue:
1711 destroy_workqueue(hdev->workqueue);
1712err:
f20d09d5 1713 write_lock(&hci_dev_list_lock);
f48fd9c8 1714 list_del(&hdev->list);
f20d09d5 1715 write_unlock(&hci_dev_list_lock);
f48fd9c8 1716
33ca954d 1717 return error;
1da177e4
LT		 1718}
1719EXPORT_SYMBOL(hci_register_dev);
1720
1721/* Unregister HCI device */
59735631 1722void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1723{
ef222013
MH		 1724 int i;
1725
c13854ce 1726 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1727
f20d09d5 1728 write_lock(&hci_dev_list_lock);
1da177e4 1729 list_del(&hdev->list);
f20d09d5 1730 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1731
1732 hci_dev_do_close(hdev);
1733
cd4c5391 1734 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1735 kfree_skb(hdev->reassembly[i]);
1736
ab81cbf9 1737 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1738 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1739 hci_dev_lock(hdev);
744cf19e 1740 mgmt_index_removed(hdev);
09fd0de5 1741 hci_dev_unlock(hdev);
56e5cb86 1742 }
ab81cbf9 1743
2e58ef3e
JH		 1744 /* mgmt_index_removed should take care of emptying the
1745 * pending list */
1746 BUG_ON(!list_empty(&hdev->mgmt_pending));
1747
1da177e4
LT		 1748 hci_notify(hdev, HCI_DEV_UNREG);
1749
611b30f7
MH		 1750 if (hdev->rfkill) {
1751 rfkill_unregister(hdev->rfkill);
1752 rfkill_destroy(hdev->rfkill);
1753 }
1754
ce242970 1755 hci_del_sysfs(hdev);
147e2d59 1756
db323f2f 1757 cancel_delayed_work_sync(&hdev->adv_work);
c6f3c5f7 1758
f48fd9c8
MH		 1759 destroy_workqueue(hdev->workqueue);
1760
09fd0de5 1761 hci_dev_lock(hdev);
e2e0cacb 1762 hci_blacklist_clear(hdev);
2aeb9a1a 1763 hci_uuids_clear(hdev);
55ed8ca1 1764 hci_link_keys_clear(hdev);
b899efaf 1765 hci_smp_ltks_clear(hdev);
2763eda6 1766 hci_remote_oob_data_clear(hdev);
76c8686f 1767 hci_adv_entries_clear(hdev);
09fd0de5 1768 hci_dev_unlock(hdev);
e2e0cacb 1769
dc946bd8 1770 hci_dev_put(hdev);
1da177e4
LT		 1771}
1772EXPORT_SYMBOL(hci_unregister_dev);
1773
1774/* Suspend HCI device */
1775int hci_suspend_dev(struct hci_dev *hdev)
1776{
1777 hci_notify(hdev, HCI_DEV_SUSPEND);
1778 return 0;
1779}
1780EXPORT_SYMBOL(hci_suspend_dev);
1781
1782/* Resume HCI device */
1783int hci_resume_dev(struct hci_dev *hdev)
1784{
1785 hci_notify(hdev, HCI_DEV_RESUME);
1786 return 0;
1787}
1788EXPORT_SYMBOL(hci_resume_dev);
1789
76bca880
MH		 1790/* Receive frame from HCI drivers */
1791int hci_recv_frame(struct sk_buff *skb)
1792{
1793 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1794 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1795 && !test_bit(HCI_INIT, &hdev->flags))) {
1796 kfree_skb(skb);
1797 return -ENXIO;
1798 }
1799
1800 /* Incomming skb */
1801 bt_cb(skb)->incoming = 1;
1802
1803 /* Time stamp */
1804 __net_timestamp(skb);
1805
76bca880 1806 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1807 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1808
76bca880
MH		 1809 return 0;
1810}
1811EXPORT_SYMBOL(hci_recv_frame);
1812
33e882a5 1813static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1814 int count, __u8 index)
33e882a5
SS		 1815{
1816 int len = 0;
1817 int hlen = 0;
1818 int remain = count;
1819 struct sk_buff *skb;
1820 struct bt_skb_cb *scb;
1821
1822 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1823 index >= NUM_REASSEMBLY)
1824 return -EILSEQ;
1825
1826 skb = hdev->reassembly[index];
1827
1828 if (!skb) {
1829 switch (type) {
1830 case HCI_ACLDATA_PKT:
1831 len = HCI_MAX_FRAME_SIZE;
1832 hlen = HCI_ACL_HDR_SIZE;
1833 break;
1834 case HCI_EVENT_PKT:
1835 len = HCI_MAX_EVENT_SIZE;
1836 hlen = HCI_EVENT_HDR_SIZE;
1837 break;
1838 case HCI_SCODATA_PKT:
1839 len = HCI_MAX_SCO_SIZE;
1840 hlen = HCI_SCO_HDR_SIZE;
1841 break;
1842 }
1843
1e429f38 1844 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1845 if (!skb)
1846 return -ENOMEM;
1847
1848 scb = (void *) skb->cb;
1849 scb->expect = hlen;
1850 scb->pkt_type = type;
1851
1852 skb->dev = (void *) hdev;
1853 hdev->reassembly[index] = skb;
1854 }
1855
1856 while (count) {
1857 scb = (void *) skb->cb;
1858 len = min(scb->expect, (__u16)count);
1859
1860 memcpy(skb_put(skb, len), data, len);
1861
1862 count -= len;
1863 data += len;
1864 scb->expect -= len;
1865 remain = count;
1866
1867 switch (type) {
1868 case HCI_EVENT_PKT:
1869 if (skb->len == HCI_EVENT_HDR_SIZE) {
1870 struct hci_event_hdr *h = hci_event_hdr(skb);
1871 scb->expect = h->plen;
1872
1873 if (skb_tailroom(skb) < scb->expect) {
1874 kfree_skb(skb);
1875 hdev->reassembly[index] = NULL;
1876 return -ENOMEM;
1877 }
1878 }
1879 break;
1880
1881 case HCI_ACLDATA_PKT:
1882 if (skb->len == HCI_ACL_HDR_SIZE) {
1883 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1884 scb->expect = __le16_to_cpu(h->dlen);
1885
1886 if (skb_tailroom(skb) < scb->expect) {
1887 kfree_skb(skb);
1888 hdev->reassembly[index] = NULL;
1889 return -ENOMEM;
1890 }
1891 }
1892 break;
1893
1894 case HCI_SCODATA_PKT:
1895 if (skb->len == HCI_SCO_HDR_SIZE) {
1896 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1897 scb->expect = h->dlen;
1898
1899 if (skb_tailroom(skb) < scb->expect) {
1900 kfree_skb(skb);
1901 hdev->reassembly[index] = NULL;
1902 return -ENOMEM;
1903 }
1904 }
1905 break;
1906 }
1907
1908 if (scb->expect == 0) {
1909 /* Complete frame */
1910
1911 bt_cb(skb)->pkt_type = type;
1912 hci_recv_frame(skb);
1913
1914 hdev->reassembly[index] = NULL;
1915 return remain;
1916 }
1917 }
1918
1919 return remain;
1920}
1921
ef222013
MH		 1922int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1923{
f39a3c06
SS		 1924 int rem = 0;
1925
ef222013
MH		 1926 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1927 return -EILSEQ;
1928
da5f6c37 1929 while (count) {
1e429f38 1930 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1931 if (rem < 0)
1932 return rem;
ef222013 1933
f39a3c06
SS		 1934 data += (count - rem);
1935 count = rem;
f81c6224 1936 }
ef222013 1937
f39a3c06 1938 return rem;
ef222013
MH		 1939}
1940EXPORT_SYMBOL(hci_recv_fragment);
1941
99811510
SS		 1942#define STREAM_REASSEMBLY 0
1943
1944int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1945{
1946 int type;
1947 int rem = 0;
1948
da5f6c37 1949 while (count) {
99811510
SS		 1950 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
1951
1952 if (!skb) {
1953 struct { char type; } *pkt;
1954
1955 /* Start of the frame */
1956 pkt = data;
1957 type = pkt->type;
1958
1959 data++;
1960 count--;
1961 } else
1962 type = bt_cb(skb)->pkt_type;
1963
1e429f38
GP		 1964 rem = hci_reassembly(hdev, type, data, count,
1965 STREAM_REASSEMBLY);
99811510
SS		 1966 if (rem < 0)
1967 return rem;
1968
1969 data += (count - rem);
1970 count = rem;
f81c6224 1971 }
99811510
SS		 1972
1973 return rem;
1974}
1975EXPORT_SYMBOL(hci_recv_stream_fragment);
1976
1da177e4
LT		 1977/* ---- Interface to upper protocols ---- */
1978
1da177e4
LT		 1979int hci_register_cb(struct hci_cb *cb)
1980{
1981 BT_DBG("%p name %s", cb, cb->name);
1982
f20d09d5 1983 write_lock(&hci_cb_list_lock);
1da177e4 1984 list_add(&cb->list, &hci_cb_list);
f20d09d5 1985 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 1986
1987 return 0;
1988}
1989EXPORT_SYMBOL(hci_register_cb);
1990
1991int hci_unregister_cb(struct hci_cb *cb)
1992{
1993 BT_DBG("%p name %s", cb, cb->name);
1994
f20d09d5 1995 write_lock(&hci_cb_list_lock);
1da177e4 1996 list_del(&cb->list);
f20d09d5 1997 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 1998
1999 return 0;
2000}
2001EXPORT_SYMBOL(hci_unregister_cb);
2002
2003static int hci_send_frame(struct sk_buff *skb)
2004{
2005 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2006
2007 if (!hdev) {
2008 kfree_skb(skb);
2009 return -ENODEV;
2010 }
2011
0d48d939 2012 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4
LT		 2013
2014 if (atomic_read(&hdev->promisc)) {
2015 /* Time stamp */
a61bbcf2 2016 __net_timestamp(skb);
1da177e4 2017
eec8d2bc 2018 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 2019 }
2020
2021 /* Get rid of skb owner, prior to sending to the driver. */
2022 skb_orphan(skb);
2023
2024 return hdev->send(skb);
2025}
2026
2027/* Send HCI command */
a9de9248 2028int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2029{
2030 int len = HCI_COMMAND_HDR_SIZE + plen;
2031 struct hci_command_hdr *hdr;
2032 struct sk_buff *skb;
2033
a9de9248 2034 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2035
2036 skb = bt_skb_alloc(len, GFP_ATOMIC);
2037 if (!skb) {
ef222013 2038 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2039 return -ENOMEM;
2040 }
2041
2042 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2043 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2044 hdr->plen = plen;
2045
2046 if (plen)
2047 memcpy(skb_put(skb, plen), param, plen);
2048
2049 BT_DBG("skb len %d", skb->len);
2050
0d48d939 2051 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2052 skb->dev = (void *) hdev;
c78ae283 2053
a5040efa
JH		 2054 if (test_bit(HCI_INIT, &hdev->flags))
2055 hdev->init_last_cmd = opcode;
2056
1da177e4 2057 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2058 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2059
2060 return 0;
2061}
1da177e4
LT		 2062
2063/* Get data from the previously sent command */
a9de9248 2064void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2065{
2066 struct hci_command_hdr *hdr;
2067
2068 if (!hdev->sent_cmd)
2069 return NULL;
2070
2071 hdr = (void *) hdev->sent_cmd->data;
2072
a9de9248 2073 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2074 return NULL;
2075
a9de9248 2076 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2077
2078 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2079}
2080
2081/* Send ACL data */
2082static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2083{
2084 struct hci_acl_hdr *hdr;
2085 int len = skb->len;
2086
badff6d0
ACM		 2087 skb_push(skb, HCI_ACL_HDR_SIZE);
2088 skb_reset_transport_header(skb);
9c70220b 2089 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2090 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2091 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2092}
2093
73d80deb
LAD		 2094static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2095 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2096{
2097 struct hci_dev *hdev = conn->hdev;
2098 struct sk_buff *list;
2099
70f23020
AE		 2100 list = skb_shinfo(skb)->frag_list;
2101 if (!list) {
1da177e4
LT		 2102 /* Non fragmented */
2103 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2104
73d80deb 2105 skb_queue_tail(queue, skb);
1da177e4
LT		 2106 } else {
2107 /* Fragmented */
2108 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2109
2110 skb_shinfo(skb)->frag_list = NULL;
2111
2112 /* Queue all fragments atomically */
af3e6359 2113 spin_lock(&queue->lock);
1da177e4 2114
73d80deb 2115 __skb_queue_tail(queue, skb);
e702112f
AE		 2116
2117 flags &= ~ACL_START;
2118 flags |= ACL_CONT;
1da177e4
LT		 2119 do {
2120 skb = list; list = list->next;
8e87d142 2121
1da177e4 2122 skb->dev = (void *) hdev;
0d48d939 2123 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2124 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2125
2126 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2127
73d80deb 2128 __skb_queue_tail(queue, skb);
1da177e4
LT		 2129 } while (list);
2130
af3e6359 2131 spin_unlock(&queue->lock);
1da177e4 2132 }
73d80deb
LAD		 2133}
2134
2135void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2136{
2137 struct hci_conn *conn = chan->conn;
2138 struct hci_dev *hdev = conn->hdev;
2139
2140 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2141
2142 skb->dev = (void *) hdev;
2143 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2144 hci_add_acl_hdr(skb, conn->handle, flags);
2145
2146 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2147
3eff45ea 2148 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2149}
2150EXPORT_SYMBOL(hci_send_acl);
2151
2152/* Send SCO data */
0d861d8b 2153void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2154{
2155 struct hci_dev *hdev = conn->hdev;
2156 struct hci_sco_hdr hdr;
2157
2158 BT_DBG("%s len %d", hdev->name, skb->len);
2159
aca3192c 2160 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2161 hdr.dlen = skb->len;
2162
badff6d0
ACM		 2163 skb_push(skb, HCI_SCO_HDR_SIZE);
2164 skb_reset_transport_header(skb);
9c70220b 2165 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2166
2167 skb->dev = (void *) hdev;
0d48d939 2168 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2169
1da177e4 2170 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2171 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2172}
2173EXPORT_SYMBOL(hci_send_sco);
2174
2175/* ---- HCI TX task (outgoing data) ---- */
2176
2177/* HCI Connection scheduler */
2178static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2179{
2180 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2181 struct hci_conn *conn = NULL, *c;
1da177e4 2182 int num = 0, min = ~0;
1da177e4 2183
8e87d142 2184 /* We don't have to lock device here. Connections are always
1da177e4 2185 * added and removed with TX task disabled. */
bf4c6325
GP		 2186
2187 rcu_read_lock();
2188
2189 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2190 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2191 continue;
769be974
MH		 2192
2193 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2194 continue;
2195
1da177e4
LT		 2196 num++;
2197
2198 if (c->sent < min) {
2199 min = c->sent;
2200 conn = c;
2201 }
52087a79
LAD		 2202
2203 if (hci_conn_num(hdev, type) == num)
2204 break;
1da177e4
LT		 2205 }
2206
bf4c6325
GP		 2207 rcu_read_unlock();
2208
1da177e4 2209 if (conn) {
6ed58ec5
VT		 2210 int cnt, q;
2211
2212 switch (conn->type) {
2213 case ACL_LINK:
2214 cnt = hdev->acl_cnt;
2215 break;
2216 case SCO_LINK:
2217 case ESCO_LINK:
2218 cnt = hdev->sco_cnt;
2219 break;
2220 case LE_LINK:
2221 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2222 break;
2223 default:
2224 cnt = 0;
2225 BT_ERR("Unknown link type");
2226 }
2227
2228 q = cnt / num;
1da177e4
LT		 2229 *quote = q ? q : 1;
2230 } else
2231 *quote = 0;
2232
2233 BT_DBG("conn %p quote %d", conn, *quote);
2234 return conn;
2235}
2236
bae1f5d9 2237static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2238{
2239 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2240 struct hci_conn *c;
1da177e4 2241
bae1f5d9 2242 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2243
bf4c6325
GP		 2244 rcu_read_lock();
2245
1da177e4 2246 /* Kill stalled connections */
bf4c6325 2247 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2248 if (c->type == type && c->sent) {
2249 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2250 hdev->name, batostr(&c->dst));
2251 hci_acl_disconn(c, 0x13);
2252 }
2253 }
bf4c6325
GP		 2254
2255 rcu_read_unlock();
1da177e4
LT		 2256}
2257
73d80deb
LAD		 2258static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2259 int *quote)
1da177e4 2260{
73d80deb
LAD		 2261 struct hci_conn_hash *h = &hdev->conn_hash;
2262 struct hci_chan *chan = NULL;
2263 int num = 0, min = ~0, cur_prio = 0;
1da177e4 2264 struct hci_conn *conn;
73d80deb
LAD		 2265 int cnt, q, conn_num = 0;
2266
2267 BT_DBG("%s", hdev->name);
2268
bf4c6325
GP		 2269 rcu_read_lock();
2270
2271 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2272 struct hci_chan *tmp;
2273
2274 if (conn->type != type)
2275 continue;
2276
2277 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2278 continue;
2279
2280 conn_num++;
2281
8192edef 2282 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2283 struct sk_buff *skb;
2284
2285 if (skb_queue_empty(&tmp->data_q))
2286 continue;
2287
2288 skb = skb_peek(&tmp->data_q);
2289 if (skb->priority < cur_prio)
2290 continue;
2291
2292 if (skb->priority > cur_prio) {
2293 num = 0;
2294 min = ~0;
2295 cur_prio = skb->priority;
2296 }
2297
2298 num++;
2299
2300 if (conn->sent < min) {
2301 min = conn->sent;
2302 chan = tmp;
2303 }
2304 }
2305
2306 if (hci_conn_num(hdev, type) == conn_num)
2307 break;
2308 }
2309
bf4c6325
GP		 2310 rcu_read_unlock();
2311
73d80deb
LAD		 2312 if (!chan)
2313 return NULL;
2314
2315 switch (chan->conn->type) {
2316 case ACL_LINK:
2317 cnt = hdev->acl_cnt;
2318 break;
2319 case SCO_LINK:
2320 case ESCO_LINK:
2321 cnt = hdev->sco_cnt;
2322 break;
2323 case LE_LINK:
2324 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2325 break;
2326 default:
2327 cnt = 0;
2328 BT_ERR("Unknown link type");
2329 }
2330
2331 q = cnt / num;
2332 *quote = q ? q : 1;
2333 BT_DBG("chan %p quote %d", chan, *quote);
2334 return chan;
2335}
2336
02b20f0b
LAD		 2337static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2338{
2339 struct hci_conn_hash *h = &hdev->conn_hash;
2340 struct hci_conn *conn;
2341 int num = 0;
2342
2343 BT_DBG("%s", hdev->name);
2344
bf4c6325
GP		 2345 rcu_read_lock();
2346
2347 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2348 struct hci_chan *chan;
2349
2350 if (conn->type != type)
2351 continue;
2352
2353 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2354 continue;
2355
2356 num++;
2357
8192edef 2358 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2359 struct sk_buff *skb;
2360
2361 if (chan->sent) {
2362 chan->sent = 0;
2363 continue;
2364 }
2365
2366 if (skb_queue_empty(&chan->data_q))
2367 continue;
2368
2369 skb = skb_peek(&chan->data_q);
2370 if (skb->priority >= HCI_PRIO_MAX - 1)
2371 continue;
2372
2373 skb->priority = HCI_PRIO_MAX - 1;
2374
2375 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2376 skb->priority);
2377 }
2378
2379 if (hci_conn_num(hdev, type) == num)
2380 break;
2381 }
bf4c6325
GP		 2382
2383 rcu_read_unlock();
2384
02b20f0b
LAD		 2385}
2386
73d80deb
LAD		 2387static inline void hci_sched_acl(struct hci_dev *hdev)
2388{
2389 struct hci_chan *chan;
1da177e4
LT		 2390 struct sk_buff *skb;
2391 int quote;
73d80deb 2392 unsigned int cnt;
1da177e4
LT		 2393
2394 BT_DBG("%s", hdev->name);
2395
52087a79
LAD		 2396 if (!hci_conn_num(hdev, ACL_LINK))
2397 return;
2398
1da177e4
LT		 2399 if (!test_bit(HCI_RAW, &hdev->flags)) {
2400 /* ACL tx timeout must be longer than maximum
2401 * link supervision timeout (40.9 seconds) */
cc48dc0a
AE		 2402 if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx +
2403 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2404 hci_link_tx_to(hdev, ACL_LINK);
1da177e4
LT		 2405 }
2406
73d80deb 2407 cnt = hdev->acl_cnt;
04837f64 2408
73d80deb
LAD		 2409 while (hdev->acl_cnt &&
2410 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2411 u32 priority = (skb_peek(&chan->data_q))->priority;
2412 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2413 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2414 skb->len, skb->priority);
2415
ec1cce24
LAD		 2416 /* Stop if priority has changed */
2417 if (skb->priority < priority)
2418 break;
2419
2420 skb = skb_dequeue(&chan->data_q);
2421
73d80deb
LAD		 2422 hci_conn_enter_active_mode(chan->conn,
2423 bt_cb(skb)->force_active);
04837f64 2424
1da177e4
LT		 2425 hci_send_frame(skb);
2426 hdev->acl_last_tx = jiffies;
2427
2428 hdev->acl_cnt--;
73d80deb
LAD		 2429 chan->sent++;
2430 chan->conn->sent++;
1da177e4
LT		 2431 }
2432 }
02b20f0b
LAD		 2433
2434 if (cnt != hdev->acl_cnt)
2435 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2436}
2437
2438/* Schedule SCO */
2439static inline void hci_sched_sco(struct hci_dev *hdev)
2440{
2441 struct hci_conn *conn;
2442 struct sk_buff *skb;
2443 int quote;
2444
2445 BT_DBG("%s", hdev->name);
2446
52087a79
LAD		 2447 if (!hci_conn_num(hdev, SCO_LINK))
2448 return;
2449
1da177e4
LT		 2450 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2451 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2452 BT_DBG("skb %p len %d", skb, skb->len);
2453 hci_send_frame(skb);
2454
2455 conn->sent++;
2456 if (conn->sent == ~0)
2457 conn->sent = 0;
2458 }
2459 }
2460}
2461
b6a0dc82
MH		 2462static inline void hci_sched_esco(struct hci_dev *hdev)
2463{
2464 struct hci_conn *conn;
2465 struct sk_buff *skb;
2466 int quote;
2467
2468 BT_DBG("%s", hdev->name);
2469
52087a79
LAD		 2470 if (!hci_conn_num(hdev, ESCO_LINK))
2471 return;
2472
b6a0dc82
MH		 2473 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2474 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2475 BT_DBG("skb %p len %d", skb, skb->len);
2476 hci_send_frame(skb);
2477
2478 conn->sent++;
2479 if (conn->sent == ~0)
2480 conn->sent = 0;
2481 }
2482 }
2483}
2484
6ed58ec5
VT		 2485static inline void hci_sched_le(struct hci_dev *hdev)
2486{
73d80deb 2487 struct hci_chan *chan;
6ed58ec5 2488 struct sk_buff *skb;
02b20f0b 2489 int quote, cnt, tmp;
6ed58ec5
VT		 2490
2491 BT_DBG("%s", hdev->name);
2492
52087a79
LAD		 2493 if (!hci_conn_num(hdev, LE_LINK))
2494 return;
2495
6ed58ec5
VT		 2496 if (!test_bit(HCI_RAW, &hdev->flags)) {
2497 /* LE tx timeout must be longer than maximum
2498 * link supervision timeout (40.9 seconds) */
bae1f5d9 2499 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2500 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2501 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2502 }
2503
2504 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2505 tmp = cnt;
73d80deb 2506 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2507 u32 priority = (skb_peek(&chan->data_q))->priority;
2508 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2509 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2510 skb->len, skb->priority);
6ed58ec5 2511
ec1cce24
LAD		 2512 /* Stop if priority has changed */
2513 if (skb->priority < priority)
2514 break;
2515
2516 skb = skb_dequeue(&chan->data_q);
2517
6ed58ec5
VT		 2518 hci_send_frame(skb);
2519 hdev->le_last_tx = jiffies;
2520
2521 cnt--;
73d80deb
LAD		 2522 chan->sent++;
2523 chan->conn->sent++;
6ed58ec5
VT		 2524 }
2525 }
73d80deb 2526
6ed58ec5
VT		 2527 if (hdev->le_pkts)
2528 hdev->le_cnt = cnt;
2529 else
2530 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2531
2532 if (cnt != tmp)
2533 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2534}
2535
3eff45ea 2536static void hci_tx_work(struct work_struct *work)
1da177e4 2537{
3eff45ea 2538 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2539 struct sk_buff *skb;
2540
6ed58ec5
VT		 2541 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2542 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2543
2544 /* Schedule queues and send stuff to HCI driver */
2545
2546 hci_sched_acl(hdev);
2547
2548 hci_sched_sco(hdev);
2549
b6a0dc82
MH		 2550 hci_sched_esco(hdev);
2551
6ed58ec5
VT		 2552 hci_sched_le(hdev);
2553
1da177e4
LT		 2554 /* Send next queued raw (unknown type) packet */
2555 while ((skb = skb_dequeue(&hdev->raw_q)))
2556 hci_send_frame(skb);
1da177e4
LT		 2557}
2558
25985edc 2559/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2560
2561/* ACL data packet */
2562static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2563{
2564 struct hci_acl_hdr *hdr = (void *) skb->data;
2565 struct hci_conn *conn;
2566 __u16 handle, flags;
2567
2568 skb_pull(skb, HCI_ACL_HDR_SIZE);
2569
2570 handle = __le16_to_cpu(hdr->handle);
2571 flags = hci_flags(handle);
2572 handle = hci_handle(handle);
2573
2574 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2575
2576 hdev->stat.acl_rx++;
2577
2578 hci_dev_lock(hdev);
2579 conn = hci_conn_hash_lookup_handle(hdev, handle);
2580 hci_dev_unlock(hdev);
8e87d142 2581
1da177e4 2582 if (conn) {
65983fc7 2583 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2584
1da177e4 2585 /* Send to upper protocol */
686ebf28
UF		 2586 l2cap_recv_acldata(conn, skb, flags);
2587 return;
1da177e4 2588 } else {
8e87d142 2589 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2590 hdev->name, handle);
2591 }
2592
2593 kfree_skb(skb);
2594}
2595
2596/* SCO data packet */
2597static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2598{
2599 struct hci_sco_hdr *hdr = (void *) skb->data;
2600 struct hci_conn *conn;
2601 __u16 handle;
2602
2603 skb_pull(skb, HCI_SCO_HDR_SIZE);
2604
2605 handle = __le16_to_cpu(hdr->handle);
2606
2607 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2608
2609 hdev->stat.sco_rx++;
2610
2611 hci_dev_lock(hdev);
2612 conn = hci_conn_hash_lookup_handle(hdev, handle);
2613 hci_dev_unlock(hdev);
2614
2615 if (conn) {
1da177e4 2616 /* Send to upper protocol */
686ebf28
UF		 2617 sco_recv_scodata(conn, skb);
2618 return;
1da177e4 2619 } else {
8e87d142 2620 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2621 hdev->name, handle);
2622 }
2623
2624 kfree_skb(skb);
2625}
2626
b78752cc 2627static void hci_rx_work(struct work_struct *work)
1da177e4 2628{
b78752cc 2629 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2630 struct sk_buff *skb;
2631
2632 BT_DBG("%s", hdev->name);
2633
1da177e4
LT		 2634 while ((skb = skb_dequeue(&hdev->rx_q))) {
2635 if (atomic_read(&hdev->promisc)) {
2636 /* Send copy to the sockets */
eec8d2bc 2637 hci_send_to_sock(hdev, skb, NULL);
1da177e4
LT		 2638 }
2639
2640 if (test_bit(HCI_RAW, &hdev->flags)) {
2641 kfree_skb(skb);
2642 continue;
2643 }
2644
2645 if (test_bit(HCI_INIT, &hdev->flags)) {
2646 /* Don't process data packets in this states. */
0d48d939 2647 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2648 case HCI_ACLDATA_PKT:
2649 case HCI_SCODATA_PKT:
2650 kfree_skb(skb);
2651 continue;
3ff50b79 2652 }
1da177e4
LT		 2653 }
2654
2655 /* Process frame */
0d48d939 2656 switch (bt_cb(skb)->pkt_type) {
1da177e4 2657 case HCI_EVENT_PKT:
b78752cc 2658 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2659 hci_event_packet(hdev, skb);
2660 break;
2661
2662 case HCI_ACLDATA_PKT:
2663 BT_DBG("%s ACL data packet", hdev->name);
2664 hci_acldata_packet(hdev, skb);
2665 break;
2666
2667 case HCI_SCODATA_PKT:
2668 BT_DBG("%s SCO data packet", hdev->name);
2669 hci_scodata_packet(hdev, skb);
2670 break;
2671
2672 default:
2673 kfree_skb(skb);
2674 break;
2675 }
2676 }
1da177e4
LT		 2677}
2678
c347b765 2679static void hci_cmd_work(struct work_struct *work)
1da177e4 2680{
c347b765 2681 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2682 struct sk_buff *skb;
2683
2684 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2685
1da177e4 2686 /* Send queued commands */
5a08ecce
AE		 2687 if (atomic_read(&hdev->cmd_cnt)) {
2688 skb = skb_dequeue(&hdev->cmd_q);
2689 if (!skb)
2690 return;
2691
7585b97a 2692 kfree_skb(hdev->sent_cmd);
1da177e4 2693
70f23020
AE		 2694 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2695 if (hdev->sent_cmd) {
1da177e4
LT		 2696 atomic_dec(&hdev->cmd_cnt);
2697 hci_send_frame(skb);
7bdb8a5c
SJ		 2698 if (test_bit(HCI_RESET, &hdev->flags))
2699 del_timer(&hdev->cmd_timer);
2700 else
2701 mod_timer(&hdev->cmd_timer,
6bd32326 2702 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2703 } else {
2704 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2705 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2706 }
2707 }
2708}
2519a1fc
AG		 2709
2710int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2711{
2712 /* General inquiry access code (GIAC) */
2713 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2714 struct hci_cp_inquiry cp;
2715
2716 BT_DBG("%s", hdev->name);
2717
2718 if (test_bit(HCI_INQUIRY, &hdev->flags))
2719 return -EINPROGRESS;
2720
4663262c
JH		 2721 inquiry_cache_flush(hdev);
2722
2519a1fc
AG		 2723 memset(&cp, 0, sizeof(cp));
2724 memcpy(&cp.lap, lap, sizeof(cp.lap));
2725 cp.length = length;
2726
2727 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2728}
023d5049
AG		 2729
2730int hci_cancel_inquiry(struct hci_dev *hdev)
2731{
2732 BT_DBG("%s", hdev->name);
2733
2734 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2735 return -EPERM;
2736
2737 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2738}
7784d78f
AE		 2739
2740module_param(enable_hs, bool, 0644);
2741MODULE_PARM_DESC(enable_hs, "Enable High Speed");
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