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staging: zcache: fix ppc64 and other arches where PAGE_SIZE!=4K
[linux-2.6.git] / net / bluetooth / hci_core.c
blob596660d37c5e56d6a0178b16b288a2d3c868f965
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
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
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
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI core. */
27
28 #include <linux/export.h>
29 #include <linux/idr.h>
30
31 #include <linux/rfkill.h>
32
33 #include <net/bluetooth/bluetooth.h>
34 #include <net/bluetooth/hci_core.h>
35
36 static void hci_rx_work(struct work_struct *work);
37 static void hci_cmd_work(struct work_struct *work);
38 static void hci_tx_work(struct work_struct *work);
39
40 /* HCI device list */
41 LIST_HEAD(hci_dev_list);
42 DEFINE_RWLOCK(hci_dev_list_lock);
43
44 /* HCI callback list */
45 LIST_HEAD(hci_cb_list);
46 DEFINE_RWLOCK(hci_cb_list_lock);
47
48 /* HCI ID Numbering */
49 static DEFINE_IDA(hci_index_ida);
50
51 /* ---- HCI notifications ---- */
52
53 static void hci_notify(struct hci_dev *hdev, int event)
54 {
55 hci_sock_dev_event(hdev, event);
56 }
57
58 /* ---- HCI requests ---- */
59
60 void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
61 {
62 BT_DBG("%s command 0x%4.4x result 0x%2.2x", hdev->name, cmd, result);
63
64 /* If this is the init phase check if the completed command matches
65 * the last init command, and if not just return.
66 */
67 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
68 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
69 u16 opcode = __le16_to_cpu(sent->opcode);
70 struct sk_buff *skb;
71
72 /* Some CSR based controllers generate a spontaneous
73 * reset complete event during init and any pending
74 * command will never be completed. In such a case we
75 * need to resend whatever was the last sent
76 * command.
77 */
78
79 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
80 return;
81
82 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
83 if (skb) {
84 skb_queue_head(&hdev->cmd_q, skb);
85 queue_work(hdev->workqueue, &hdev->cmd_work);
86 }
87
88 return;
89 }
90
91 if (hdev->req_status == HCI_REQ_PEND) {
92 hdev->req_result = result;
93 hdev->req_status = HCI_REQ_DONE;
94 wake_up_interruptible(&hdev->req_wait_q);
95 }
96 }
97
98 static void hci_req_cancel(struct hci_dev *hdev, int err)
99 {
100 BT_DBG("%s err 0x%2.2x", hdev->name, err);
101
102 if (hdev->req_status == HCI_REQ_PEND) {
103 hdev->req_result = err;
104 hdev->req_status = HCI_REQ_CANCELED;
105 wake_up_interruptible(&hdev->req_wait_q);
106 }
107 }
108
109 /* Execute request and wait for completion. */
110 static int __hci_request(struct hci_dev *hdev,
111 void (*req)(struct hci_dev *hdev, unsigned long opt),
112 unsigned long opt, __u32 timeout)
113 {
114 DECLARE_WAITQUEUE(wait, current);
115 int err = 0;
116
117 BT_DBG("%s start", hdev->name);
118
119 hdev->req_status = HCI_REQ_PEND;
120
121 add_wait_queue(&hdev->req_wait_q, &wait);
122 set_current_state(TASK_INTERRUPTIBLE);
123
124 req(hdev, opt);
125 schedule_timeout(timeout);
126
127 remove_wait_queue(&hdev->req_wait_q, &wait);
128
129 if (signal_pending(current))
130 return -EINTR;
131
132 switch (hdev->req_status) {
133 case HCI_REQ_DONE:
134 err = -bt_to_errno(hdev->req_result);
135 break;
136
137 case HCI_REQ_CANCELED:
138 err = -hdev->req_result;
139 break;
140
141 default:
142 err = -ETIMEDOUT;
143 break;
144 }
145
146 hdev->req_status = hdev->req_result = 0;
147
148 BT_DBG("%s end: err %d", hdev->name, err);
149
150 return err;
151 }
152
153 static int hci_request(struct hci_dev *hdev,
154 void (*req)(struct hci_dev *hdev, unsigned long opt),
155 unsigned long opt, __u32 timeout)
156 {
157 int ret;
158
159 if (!test_bit(HCI_UP, &hdev->flags))
160 return -ENETDOWN;
161
162 /* Serialize all requests */
163 hci_req_lock(hdev);
164 ret = __hci_request(hdev, req, opt, timeout);
165 hci_req_unlock(hdev);
166
167 return ret;
168 }
169
170 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
171 {
172 BT_DBG("%s %ld", hdev->name, opt);
173
174 /* Reset device */
175 set_bit(HCI_RESET, &hdev->flags);
176 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
177 }
178
179 static void bredr_init(struct hci_dev *hdev)
180 {
181 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
182
183 /* Read Local Supported Features */
184 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
185
186 /* Read Local Version */
187 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
188 }
189
190 static void amp_init(struct hci_dev *hdev)
191 {
192 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
193
194 /* Read Local Version */
195 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
196
197 /* Read Local AMP Info */
198 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
199
200 /* Read Data Blk size */
201 hci_send_cmd(hdev, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
202 }
203
204 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
205 {
206 struct sk_buff *skb;
207
208 BT_DBG("%s %ld", hdev->name, opt);
209
210 /* Driver initialization */
211
212 /* Special commands */
213 while ((skb = skb_dequeue(&hdev->driver_init))) {
214 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
215 skb->dev = (void *) hdev;
216
217 skb_queue_tail(&hdev->cmd_q, skb);
218 queue_work(hdev->workqueue, &hdev->cmd_work);
219 }
220 skb_queue_purge(&hdev->driver_init);
221
222 /* Reset */
223 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
224 hci_reset_req(hdev, 0);
225
226 switch (hdev->dev_type) {
227 case HCI_BREDR:
228 bredr_init(hdev);
229 break;
230
231 case HCI_AMP:
232 amp_init(hdev);
233 break;
234
235 default:
236 BT_ERR("Unknown device type %d", hdev->dev_type);
237 break;
238 }
239 }
240
241 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
242 {
243 __u8 scan = opt;
244
245 BT_DBG("%s %x", hdev->name, scan);
246
247 /* Inquiry and Page scans */
248 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
249 }
250
251 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
252 {
253 __u8 auth = opt;
254
255 BT_DBG("%s %x", hdev->name, auth);
256
257 /* Authentication */
258 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
259 }
260
261 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
262 {
263 __u8 encrypt = opt;
264
265 BT_DBG("%s %x", hdev->name, encrypt);
266
267 /* Encryption */
268 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
269 }
270
271 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
272 {
273 __le16 policy = cpu_to_le16(opt);
274
275 BT_DBG("%s %x", hdev->name, policy);
276
277 /* Default link policy */
278 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
279 }
280
281 /* Get HCI device by index.
282 * Device is held on return. */
283 struct hci_dev *hci_dev_get(int index)
284 {
285 struct hci_dev *hdev = NULL, *d;
286
287 BT_DBG("%d", index);
288
289 if (index < 0)
290 return NULL;
291
292 read_lock(&hci_dev_list_lock);
293 list_for_each_entry(d, &hci_dev_list, list) {
294 if (d->id == index) {
295 hdev = hci_dev_hold(d);
296 break;
297 }
298 }
299 read_unlock(&hci_dev_list_lock);
300 return hdev;
301 }
302
303 /* ---- Inquiry support ---- */
304
305 bool hci_discovery_active(struct hci_dev *hdev)
306 {
307 struct discovery_state *discov = &hdev->discovery;
308
309 switch (discov->state) {
310 case DISCOVERY_FINDING:
311 case DISCOVERY_RESOLVING:
312 return true;
313
314 default:
315 return false;
316 }
317 }
318
319 void hci_discovery_set_state(struct hci_dev *hdev, int state)
320 {
321 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
322
323 if (hdev->discovery.state == state)
324 return;
325
326 switch (state) {
327 case DISCOVERY_STOPPED:
328 if (hdev->discovery.state != DISCOVERY_STARTING)
329 mgmt_discovering(hdev, 0);
330 break;
331 case DISCOVERY_STARTING:
332 break;
333 case DISCOVERY_FINDING:
334 mgmt_discovering(hdev, 1);
335 break;
336 case DISCOVERY_RESOLVING:
337 break;
338 case DISCOVERY_STOPPING:
339 break;
340 }
341
342 hdev->discovery.state = state;
343 }
344
345 static void inquiry_cache_flush(struct hci_dev *hdev)
346 {
347 struct discovery_state *cache = &hdev->discovery;
348 struct inquiry_entry *p, *n;
349
350 list_for_each_entry_safe(p, n, &cache->all, all) {
351 list_del(&p->all);
352 kfree(p);
353 }
354
355 INIT_LIST_HEAD(&cache->unknown);
356 INIT_LIST_HEAD(&cache->resolve);
357 }
358
359 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
360 bdaddr_t *bdaddr)
361 {
362 struct discovery_state *cache = &hdev->discovery;
363 struct inquiry_entry *e;
364
365 BT_DBG("cache %p, %pMR", cache, bdaddr);
366
367 list_for_each_entry(e, &cache->all, all) {
368 if (!bacmp(&e->data.bdaddr, bdaddr))
369 return e;
370 }
371
372 return NULL;
373 }
374
375 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
376 bdaddr_t *bdaddr)
377 {
378 struct discovery_state *cache = &hdev->discovery;
379 struct inquiry_entry *e;
380
381 BT_DBG("cache %p, %pMR", cache, bdaddr);
382
383 list_for_each_entry(e, &cache->unknown, list) {
384 if (!bacmp(&e->data.bdaddr, bdaddr))
385 return e;
386 }
387
388 return NULL;
389 }
390
391 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
392 bdaddr_t *bdaddr,
393 int state)
394 {
395 struct discovery_state *cache = &hdev->discovery;
396 struct inquiry_entry *e;
397
398 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
399
400 list_for_each_entry(e, &cache->resolve, list) {
401 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
402 return e;
403 if (!bacmp(&e->data.bdaddr, bdaddr))
404 return e;
405 }
406
407 return NULL;
408 }
409
410 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
411 struct inquiry_entry *ie)
412 {
413 struct discovery_state *cache = &hdev->discovery;
414 struct list_head *pos = &cache->resolve;
415 struct inquiry_entry *p;
416
417 list_del(&ie->list);
418
419 list_for_each_entry(p, &cache->resolve, list) {
420 if (p->name_state != NAME_PENDING &&
421 abs(p->data.rssi) >= abs(ie->data.rssi))
422 break;
423 pos = &p->list;
424 }
425
426 list_add(&ie->list, pos);
427 }
428
429 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
430 bool name_known, bool *ssp)
431 {
432 struct discovery_state *cache = &hdev->discovery;
433 struct inquiry_entry *ie;
434
435 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
436
437 hci_remove_remote_oob_data(hdev, &data->bdaddr);
438
439 if (ssp)
440 *ssp = data->ssp_mode;
441
442 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
443 if (ie) {
444 if (ie->data.ssp_mode && ssp)
445 *ssp = true;
446
447 if (ie->name_state == NAME_NEEDED &&
448 data->rssi != ie->data.rssi) {
449 ie->data.rssi = data->rssi;
450 hci_inquiry_cache_update_resolve(hdev, ie);
451 }
452
453 goto update;
454 }
455
456 /* Entry not in the cache. Add new one. */
457 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
458 if (!ie)
459 return false;
460
461 list_add(&ie->all, &cache->all);
462
463 if (name_known) {
464 ie->name_state = NAME_KNOWN;
465 } else {
466 ie->name_state = NAME_NOT_KNOWN;
467 list_add(&ie->list, &cache->unknown);
468 }
469
470 update:
471 if (name_known && ie->name_state != NAME_KNOWN &&
472 ie->name_state != NAME_PENDING) {
473 ie->name_state = NAME_KNOWN;
474 list_del(&ie->list);
475 }
476
477 memcpy(&ie->data, data, sizeof(*data));
478 ie->timestamp = jiffies;
479 cache->timestamp = jiffies;
480
481 if (ie->name_state == NAME_NOT_KNOWN)
482 return false;
483
484 return true;
485 }
486
487 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
488 {
489 struct discovery_state *cache = &hdev->discovery;
490 struct inquiry_info *info = (struct inquiry_info *) buf;
491 struct inquiry_entry *e;
492 int copied = 0;
493
494 list_for_each_entry(e, &cache->all, all) {
495 struct inquiry_data *data = &e->data;
496
497 if (copied >= num)
498 break;
499
500 bacpy(&info->bdaddr, &data->bdaddr);
501 info->pscan_rep_mode = data->pscan_rep_mode;
502 info->pscan_period_mode = data->pscan_period_mode;
503 info->pscan_mode = data->pscan_mode;
504 memcpy(info->dev_class, data->dev_class, 3);
505 info->clock_offset = data->clock_offset;
506
507 info++;
508 copied++;
509 }
510
511 BT_DBG("cache %p, copied %d", cache, copied);
512 return copied;
513 }
514
515 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
516 {
517 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
518 struct hci_cp_inquiry cp;
519
520 BT_DBG("%s", hdev->name);
521
522 if (test_bit(HCI_INQUIRY, &hdev->flags))
523 return;
524
525 /* Start Inquiry */
526 memcpy(&cp.lap, &ir->lap, 3);
527 cp.length = ir->length;
528 cp.num_rsp = ir->num_rsp;
529 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
530 }
531
532 int hci_inquiry(void __user *arg)
533 {
534 __u8 __user *ptr = arg;
535 struct hci_inquiry_req ir;
536 struct hci_dev *hdev;
537 int err = 0, do_inquiry = 0, max_rsp;
538 long timeo;
539 __u8 *buf;
540
541 if (copy_from_user(&ir, ptr, sizeof(ir)))
542 return -EFAULT;
543
544 hdev = hci_dev_get(ir.dev_id);
545 if (!hdev)
546 return -ENODEV;
547
548 hci_dev_lock(hdev);
549 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
550 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
551 inquiry_cache_flush(hdev);
552 do_inquiry = 1;
553 }
554 hci_dev_unlock(hdev);
555
556 timeo = ir.length * msecs_to_jiffies(2000);
557
558 if (do_inquiry) {
559 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
560 if (err < 0)
561 goto done;
562 }
563
564 /* for unlimited number of responses we will use buffer with
565 * 255 entries
566 */
567 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
568
569 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
570 * copy it to the user space.
571 */
572 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
573 if (!buf) {
574 err = -ENOMEM;
575 goto done;
576 }
577
578 hci_dev_lock(hdev);
579 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
580 hci_dev_unlock(hdev);
581
582 BT_DBG("num_rsp %d", ir.num_rsp);
583
584 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
585 ptr += sizeof(ir);
586 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
587 ir.num_rsp))
588 err = -EFAULT;
589 } else
590 err = -EFAULT;
591
592 kfree(buf);
593
594 done:
595 hci_dev_put(hdev);
596 return err;
597 }
598
599 static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
600 {
601 u8 ad_len = 0, flags = 0;
602 size_t name_len;
603
604 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
605 flags |= LE_AD_GENERAL;
606
607 if (!lmp_bredr_capable(hdev))
608 flags |= LE_AD_NO_BREDR;
609
610 if (lmp_le_br_capable(hdev))
611 flags |= LE_AD_SIM_LE_BREDR_CTRL;
612
613 if (lmp_host_le_br_capable(hdev))
614 flags |= LE_AD_SIM_LE_BREDR_HOST;
615
616 if (flags) {
617 BT_DBG("adv flags 0x%02x", flags);
618
619 ptr[0] = 2;
620 ptr[1] = EIR_FLAGS;
621 ptr[2] = flags;
622
623 ad_len += 3;
624 ptr += 3;
625 }
626
627 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
628 ptr[0] = 2;
629 ptr[1] = EIR_TX_POWER;
630 ptr[2] = (u8) hdev->adv_tx_power;
631
632 ad_len += 3;
633 ptr += 3;
634 }
635
636 name_len = strlen(hdev->dev_name);
637 if (name_len > 0) {
638 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
639
640 if (name_len > max_len) {
641 name_len = max_len;
642 ptr[1] = EIR_NAME_SHORT;
643 } else
644 ptr[1] = EIR_NAME_COMPLETE;
645
646 ptr[0] = name_len + 1;
647
648 memcpy(ptr + 2, hdev->dev_name, name_len);
649
650 ad_len += (name_len + 2);
651 ptr += (name_len + 2);
652 }
653
654 return ad_len;
655 }
656
657 int hci_update_ad(struct hci_dev *hdev)
658 {
659 struct hci_cp_le_set_adv_data cp;
660 u8 len;
661 int err;
662
663 hci_dev_lock(hdev);
664
665 if (!lmp_le_capable(hdev)) {
666 err = -EINVAL;
667 goto unlock;
668 }
669
670 memset(&cp, 0, sizeof(cp));
671
672 len = create_ad(hdev, cp.data);
673
674 if (hdev->adv_data_len == len &&
675 memcmp(cp.data, hdev->adv_data, len) == 0) {
676 err = 0;
677 goto unlock;
678 }
679
680 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
681 hdev->adv_data_len = len;
682
683 cp.length = len;
684 err = hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
685
686 unlock:
687 hci_dev_unlock(hdev);
688
689 return err;
690 }
691
692 /* ---- HCI ioctl helpers ---- */
693
694 int hci_dev_open(__u16 dev)
695 {
696 struct hci_dev *hdev;
697 int ret = 0;
698
699 hdev = hci_dev_get(dev);
700 if (!hdev)
701 return -ENODEV;
702
703 BT_DBG("%s %p", hdev->name, hdev);
704
705 hci_req_lock(hdev);
706
707 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
708 ret = -ENODEV;
709 goto done;
710 }
711
712 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
713 ret = -ERFKILL;
714 goto done;
715 }
716
717 if (test_bit(HCI_UP, &hdev->flags)) {
718 ret = -EALREADY;
719 goto done;
720 }
721
722 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
723 set_bit(HCI_RAW, &hdev->flags);
724
725 /* Treat all non BR/EDR controllers as raw devices if
726 enable_hs is not set */
727 if (hdev->dev_type != HCI_BREDR && !enable_hs)
728 set_bit(HCI_RAW, &hdev->flags);
729
730 if (hdev->open(hdev)) {
731 ret = -EIO;
732 goto done;
733 }
734
735 if (!test_bit(HCI_RAW, &hdev->flags)) {
736 atomic_set(&hdev->cmd_cnt, 1);
737 set_bit(HCI_INIT, &hdev->flags);
738 hdev->init_last_cmd = 0;
739
740 ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT);
741
742 clear_bit(HCI_INIT, &hdev->flags);
743 }
744
745 if (!ret) {
746 hci_dev_hold(hdev);
747 set_bit(HCI_UP, &hdev->flags);
748 hci_notify(hdev, HCI_DEV_UP);
749 hci_update_ad(hdev);
750 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
751 mgmt_valid_hdev(hdev)) {
752 hci_dev_lock(hdev);
753 mgmt_powered(hdev, 1);
754 hci_dev_unlock(hdev);
755 }
756 } else {
757 /* Init failed, cleanup */
758 flush_work(&hdev->tx_work);
759 flush_work(&hdev->cmd_work);
760 flush_work(&hdev->rx_work);
761
762 skb_queue_purge(&hdev->cmd_q);
763 skb_queue_purge(&hdev->rx_q);
764
765 if (hdev->flush)
766 hdev->flush(hdev);
767
768 if (hdev->sent_cmd) {
769 kfree_skb(hdev->sent_cmd);
770 hdev->sent_cmd = NULL;
771 }
772
773 hdev->close(hdev);
774 hdev->flags = 0;
775 }
776
777 done:
778 hci_req_unlock(hdev);
779 hci_dev_put(hdev);
780 return ret;
781 }
782
783 static int hci_dev_do_close(struct hci_dev *hdev)
784 {
785 BT_DBG("%s %p", hdev->name, hdev);
786
787 cancel_work_sync(&hdev->le_scan);
788
789 cancel_delayed_work(&hdev->power_off);
790
791 hci_req_cancel(hdev, ENODEV);
792 hci_req_lock(hdev);
793
794 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
795 del_timer_sync(&hdev->cmd_timer);
796 hci_req_unlock(hdev);
797 return 0;
798 }
799
800 /* Flush RX and TX works */
801 flush_work(&hdev->tx_work);
802 flush_work(&hdev->rx_work);
803
804 if (hdev->discov_timeout > 0) {
805 cancel_delayed_work(&hdev->discov_off);
806 hdev->discov_timeout = 0;
807 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
808 }
809
810 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
811 cancel_delayed_work(&hdev->service_cache);
812
813 cancel_delayed_work_sync(&hdev->le_scan_disable);
814
815 hci_dev_lock(hdev);
816 inquiry_cache_flush(hdev);
817 hci_conn_hash_flush(hdev);
818 hci_dev_unlock(hdev);
819
820 hci_notify(hdev, HCI_DEV_DOWN);
821
822 if (hdev->flush)
823 hdev->flush(hdev);
824
825 /* Reset device */
826 skb_queue_purge(&hdev->cmd_q);
827 atomic_set(&hdev->cmd_cnt, 1);
828 if (!test_bit(HCI_RAW, &hdev->flags) &&
829 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
830 set_bit(HCI_INIT, &hdev->flags);
831 __hci_request(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
832 clear_bit(HCI_INIT, &hdev->flags);
833 }
834
835 /* flush cmd work */
836 flush_work(&hdev->cmd_work);
837
838 /* Drop queues */
839 skb_queue_purge(&hdev->rx_q);
840 skb_queue_purge(&hdev->cmd_q);
841 skb_queue_purge(&hdev->raw_q);
842
843 /* Drop last sent command */
844 if (hdev->sent_cmd) {
845 del_timer_sync(&hdev->cmd_timer);
846 kfree_skb(hdev->sent_cmd);
847 hdev->sent_cmd = NULL;
848 }
849
850 /* After this point our queues are empty
851 * and no tasks are scheduled. */
852 hdev->close(hdev);
853
854 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
855 mgmt_valid_hdev(hdev)) {
856 hci_dev_lock(hdev);
857 mgmt_powered(hdev, 0);
858 hci_dev_unlock(hdev);
859 }
860
861 /* Clear flags */
862 hdev->flags = 0;
863
864 /* Controller radio is available but is currently powered down */
865 hdev->amp_status = 0;
866
867 memset(hdev->eir, 0, sizeof(hdev->eir));
868 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
869
870 hci_req_unlock(hdev);
871
872 hci_dev_put(hdev);
873 return 0;
874 }
875
876 int hci_dev_close(__u16 dev)
877 {
878 struct hci_dev *hdev;
879 int err;
880
881 hdev = hci_dev_get(dev);
882 if (!hdev)
883 return -ENODEV;
884
885 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
886 cancel_delayed_work(&hdev->power_off);
887
888 err = hci_dev_do_close(hdev);
889
890 hci_dev_put(hdev);
891 return err;
892 }
893
894 int hci_dev_reset(__u16 dev)
895 {
896 struct hci_dev *hdev;
897 int ret = 0;
898
899 hdev = hci_dev_get(dev);
900 if (!hdev)
901 return -ENODEV;
902
903 hci_req_lock(hdev);
904
905 if (!test_bit(HCI_UP, &hdev->flags))
906 goto done;
907
908 /* Drop queues */
909 skb_queue_purge(&hdev->rx_q);
910 skb_queue_purge(&hdev->cmd_q);
911
912 hci_dev_lock(hdev);
913 inquiry_cache_flush(hdev);
914 hci_conn_hash_flush(hdev);
915 hci_dev_unlock(hdev);
916
917 if (hdev->flush)
918 hdev->flush(hdev);
919
920 atomic_set(&hdev->cmd_cnt, 1);
921 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
922
923 if (!test_bit(HCI_RAW, &hdev->flags))
924 ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
925
926 done:
927 hci_req_unlock(hdev);
928 hci_dev_put(hdev);
929 return ret;
930 }
931
932 int hci_dev_reset_stat(__u16 dev)
933 {
934 struct hci_dev *hdev;
935 int ret = 0;
936
937 hdev = hci_dev_get(dev);
938 if (!hdev)
939 return -ENODEV;
940
941 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
942
943 hci_dev_put(hdev);
944
945 return ret;
946 }
947
948 int hci_dev_cmd(unsigned int cmd, void __user *arg)
949 {
950 struct hci_dev *hdev;
951 struct hci_dev_req dr;
952 int err = 0;
953
954 if (copy_from_user(&dr, arg, sizeof(dr)))
955 return -EFAULT;
956
957 hdev = hci_dev_get(dr.dev_id);
958 if (!hdev)
959 return -ENODEV;
960
961 switch (cmd) {
962 case HCISETAUTH:
963 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
964 HCI_INIT_TIMEOUT);
965 break;
966
967 case HCISETENCRYPT:
968 if (!lmp_encrypt_capable(hdev)) {
969 err = -EOPNOTSUPP;
970 break;
971 }
972
973 if (!test_bit(HCI_AUTH, &hdev->flags)) {
974 /* Auth must be enabled first */
975 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
976 HCI_INIT_TIMEOUT);
977 if (err)
978 break;
979 }
980
981 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
982 HCI_INIT_TIMEOUT);
983 break;
984
985 case HCISETSCAN:
986 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
987 HCI_INIT_TIMEOUT);
988 break;
989
990 case HCISETLINKPOL:
991 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
992 HCI_INIT_TIMEOUT);
993 break;
994
995 case HCISETLINKMODE:
996 hdev->link_mode = ((__u16) dr.dev_opt) &
997 (HCI_LM_MASTER | HCI_LM_ACCEPT);
998 break;
999
1000 case HCISETPTYPE:
1001 hdev->pkt_type = (__u16) dr.dev_opt;
1002 break;
1003
1004 case HCISETACLMTU:
1005 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1006 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1007 break;
1008
1009 case HCISETSCOMTU:
1010 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1011 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1012 break;
1013
1014 default:
1015 err = -EINVAL;
1016 break;
1017 }
1018
1019 hci_dev_put(hdev);
1020 return err;
1021 }
1022
1023 int hci_get_dev_list(void __user *arg)
1024 {
1025 struct hci_dev *hdev;
1026 struct hci_dev_list_req *dl;
1027 struct hci_dev_req *dr;
1028 int n = 0, size, err;
1029 __u16 dev_num;
1030
1031 if (get_user(dev_num, (__u16 __user *) arg))
1032 return -EFAULT;
1033
1034 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1035 return -EINVAL;
1036
1037 size = sizeof(*dl) + dev_num * sizeof(*dr);
1038
1039 dl = kzalloc(size, GFP_KERNEL);
1040 if (!dl)
1041 return -ENOMEM;
1042
1043 dr = dl->dev_req;
1044
1045 read_lock(&hci_dev_list_lock);
1046 list_for_each_entry(hdev, &hci_dev_list, list) {
1047 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1048 cancel_delayed_work(&hdev->power_off);
1049
1050 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1051 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1052
1053 (dr + n)->dev_id = hdev->id;
1054 (dr + n)->dev_opt = hdev->flags;
1055
1056 if (++n >= dev_num)
1057 break;
1058 }
1059 read_unlock(&hci_dev_list_lock);
1060
1061 dl->dev_num = n;
1062 size = sizeof(*dl) + n * sizeof(*dr);
1063
1064 err = copy_to_user(arg, dl, size);
1065 kfree(dl);
1066
1067 return err ? -EFAULT : 0;
1068 }
1069
1070 int hci_get_dev_info(void __user *arg)
1071 {
1072 struct hci_dev *hdev;
1073 struct hci_dev_info di;
1074 int err = 0;
1075
1076 if (copy_from_user(&di, arg, sizeof(di)))
1077 return -EFAULT;
1078
1079 hdev = hci_dev_get(di.dev_id);
1080 if (!hdev)
1081 return -ENODEV;
1082
1083 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1084 cancel_delayed_work_sync(&hdev->power_off);
1085
1086 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1087 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1088
1089 strcpy(di.name, hdev->name);
1090 di.bdaddr = hdev->bdaddr;
1091 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1092 di.flags = hdev->flags;
1093 di.pkt_type = hdev->pkt_type;
1094 if (lmp_bredr_capable(hdev)) {
1095 di.acl_mtu = hdev->acl_mtu;
1096 di.acl_pkts = hdev->acl_pkts;
1097 di.sco_mtu = hdev->sco_mtu;
1098 di.sco_pkts = hdev->sco_pkts;
1099 } else {
1100 di.acl_mtu = hdev->le_mtu;
1101 di.acl_pkts = hdev->le_pkts;
1102 di.sco_mtu = 0;
1103 di.sco_pkts = 0;
1104 }
1105 di.link_policy = hdev->link_policy;
1106 di.link_mode = hdev->link_mode;
1107
1108 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1109 memcpy(&di.features, &hdev->features, sizeof(di.features));
1110
1111 if (copy_to_user(arg, &di, sizeof(di)))
1112 err = -EFAULT;
1113
1114 hci_dev_put(hdev);
1115
1116 return err;
1117 }
1118
1119 /* ---- Interface to HCI drivers ---- */
1120
1121 static int hci_rfkill_set_block(void *data, bool blocked)
1122 {
1123 struct hci_dev *hdev = data;
1124
1125 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1126
1127 if (!blocked)
1128 return 0;
1129
1130 hci_dev_do_close(hdev);
1131
1132 return 0;
1133 }
1134
1135 static const struct rfkill_ops hci_rfkill_ops = {
1136 .set_block = hci_rfkill_set_block,
1137 };
1138
1139 static void hci_power_on(struct work_struct *work)
1140 {
1141 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1142
1143 BT_DBG("%s", hdev->name);
1144
1145 if (hci_dev_open(hdev->id) < 0)
1146 return;
1147
1148 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1149 schedule_delayed_work(&hdev->power_off, HCI_AUTO_OFF_TIMEOUT);
1150
1151 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1152 mgmt_index_added(hdev);
1153 }
1154
1155 static void hci_power_off(struct work_struct *work)
1156 {
1157 struct hci_dev *hdev = container_of(work, struct hci_dev,
1158 power_off.work);
1159
1160 BT_DBG("%s", hdev->name);
1161
1162 hci_dev_do_close(hdev);
1163 }
1164
1165 static void hci_discov_off(struct work_struct *work)
1166 {
1167 struct hci_dev *hdev;
1168 u8 scan = SCAN_PAGE;
1169
1170 hdev = container_of(work, struct hci_dev, discov_off.work);
1171
1172 BT_DBG("%s", hdev->name);
1173
1174 hci_dev_lock(hdev);
1175
1176 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1177
1178 hdev->discov_timeout = 0;
1179
1180 hci_dev_unlock(hdev);
1181 }
1182
1183 int hci_uuids_clear(struct hci_dev *hdev)
1184 {
1185 struct list_head *p, *n;
1186
1187 list_for_each_safe(p, n, &hdev->uuids) {
1188 struct bt_uuid *uuid;
1189
1190 uuid = list_entry(p, struct bt_uuid, list);
1191
1192 list_del(p);
1193 kfree(uuid);
1194 }
1195
1196 return 0;
1197 }
1198
1199 int hci_link_keys_clear(struct hci_dev *hdev)
1200 {
1201 struct list_head *p, *n;
1202
1203 list_for_each_safe(p, n, &hdev->link_keys) {
1204 struct link_key *key;
1205
1206 key = list_entry(p, struct link_key, list);
1207
1208 list_del(p);
1209 kfree(key);
1210 }
1211
1212 return 0;
1213 }
1214
1215 int hci_smp_ltks_clear(struct hci_dev *hdev)
1216 {
1217 struct smp_ltk *k, *tmp;
1218
1219 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1220 list_del(&k->list);
1221 kfree(k);
1222 }
1223
1224 return 0;
1225 }
1226
1227 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1228 {
1229 struct link_key *k;
1230
1231 list_for_each_entry(k, &hdev->link_keys, list)
1232 if (bacmp(bdaddr, &k->bdaddr) == 0)
1233 return k;
1234
1235 return NULL;
1236 }
1237
1238 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1239 u8 key_type, u8 old_key_type)
1240 {
1241 /* Legacy key */
1242 if (key_type < 0x03)
1243 return true;
1244
1245 /* Debug keys are insecure so don't store them persistently */
1246 if (key_type == HCI_LK_DEBUG_COMBINATION)
1247 return false;
1248
1249 /* Changed combination key and there's no previous one */
1250 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1251 return false;
1252
1253 /* Security mode 3 case */
1254 if (!conn)
1255 return true;
1256
1257 /* Neither local nor remote side had no-bonding as requirement */
1258 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1259 return true;
1260
1261 /* Local side had dedicated bonding as requirement */
1262 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1263 return true;
1264
1265 /* Remote side had dedicated bonding as requirement */
1266 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1267 return true;
1268
1269 /* If none of the above criteria match, then don't store the key
1270 * persistently */
1271 return false;
1272 }
1273
1274 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1275 {
1276 struct smp_ltk *k;
1277
1278 list_for_each_entry(k, &hdev->long_term_keys, list) {
1279 if (k->ediv != ediv ||
1280 memcmp(rand, k->rand, sizeof(k->rand)))
1281 continue;
1282
1283 return k;
1284 }
1285
1286 return NULL;
1287 }
1288
1289 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1290 u8 addr_type)
1291 {
1292 struct smp_ltk *k;
1293
1294 list_for_each_entry(k, &hdev->long_term_keys, list)
1295 if (addr_type == k->bdaddr_type &&
1296 bacmp(bdaddr, &k->bdaddr) == 0)
1297 return k;
1298
1299 return NULL;
1300 }
1301
1302 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1303 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1304 {
1305 struct link_key *key, *old_key;
1306 u8 old_key_type;
1307 bool persistent;
1308
1309 old_key = hci_find_link_key(hdev, bdaddr);
1310 if (old_key) {
1311 old_key_type = old_key->type;
1312 key = old_key;
1313 } else {
1314 old_key_type = conn ? conn->key_type : 0xff;
1315 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1316 if (!key)
1317 return -ENOMEM;
1318 list_add(&key->list, &hdev->link_keys);
1319 }
1320
1321 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1322
1323 /* Some buggy controller combinations generate a changed
1324 * combination key for legacy pairing even when there's no
1325 * previous key */
1326 if (type == HCI_LK_CHANGED_COMBINATION &&
1327 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1328 type = HCI_LK_COMBINATION;
1329 if (conn)
1330 conn->key_type = type;
1331 }
1332
1333 bacpy(&key->bdaddr, bdaddr);
1334 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1335 key->pin_len = pin_len;
1336
1337 if (type == HCI_LK_CHANGED_COMBINATION)
1338 key->type = old_key_type;
1339 else
1340 key->type = type;
1341
1342 if (!new_key)
1343 return 0;
1344
1345 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1346
1347 mgmt_new_link_key(hdev, key, persistent);
1348
1349 if (conn)
1350 conn->flush_key = !persistent;
1351
1352 return 0;
1353 }
1354
1355 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1356 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
1357 ediv, u8 rand[8])
1358 {
1359 struct smp_ltk *key, *old_key;
1360
1361 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1362 return 0;
1363
1364 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1365 if (old_key)
1366 key = old_key;
1367 else {
1368 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1369 if (!key)
1370 return -ENOMEM;
1371 list_add(&key->list, &hdev->long_term_keys);
1372 }
1373
1374 bacpy(&key->bdaddr, bdaddr);
1375 key->bdaddr_type = addr_type;
1376 memcpy(key->val, tk, sizeof(key->val));
1377 key->authenticated = authenticated;
1378 key->ediv = ediv;
1379 key->enc_size = enc_size;
1380 key->type = type;
1381 memcpy(key->rand, rand, sizeof(key->rand));
1382
1383 if (!new_key)
1384 return 0;
1385
1386 if (type & HCI_SMP_LTK)
1387 mgmt_new_ltk(hdev, key, 1);
1388
1389 return 0;
1390 }
1391
1392 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1393 {
1394 struct link_key *key;
1395
1396 key = hci_find_link_key(hdev, bdaddr);
1397 if (!key)
1398 return -ENOENT;
1399
1400 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1401
1402 list_del(&key->list);
1403 kfree(key);
1404
1405 return 0;
1406 }
1407
1408 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1409 {
1410 struct smp_ltk *k, *tmp;
1411
1412 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1413 if (bacmp(bdaddr, &k->bdaddr))
1414 continue;
1415
1416 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1417
1418 list_del(&k->list);
1419 kfree(k);
1420 }
1421
1422 return 0;
1423 }
1424
1425 /* HCI command timer function */
1426 static void hci_cmd_timeout(unsigned long arg)
1427 {
1428 struct hci_dev *hdev = (void *) arg;
1429
1430 if (hdev->sent_cmd) {
1431 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1432 u16 opcode = __le16_to_cpu(sent->opcode);
1433
1434 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1435 } else {
1436 BT_ERR("%s command tx timeout", hdev->name);
1437 }
1438
1439 atomic_set(&hdev->cmd_cnt, 1);
1440 queue_work(hdev->workqueue, &hdev->cmd_work);
1441 }
1442
1443 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1444 bdaddr_t *bdaddr)
1445 {
1446 struct oob_data *data;
1447
1448 list_for_each_entry(data, &hdev->remote_oob_data, list)
1449 if (bacmp(bdaddr, &data->bdaddr) == 0)
1450 return data;
1451
1452 return NULL;
1453 }
1454
1455 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1456 {
1457 struct oob_data *data;
1458
1459 data = hci_find_remote_oob_data(hdev, bdaddr);
1460 if (!data)
1461 return -ENOENT;
1462
1463 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1464
1465 list_del(&data->list);
1466 kfree(data);
1467
1468 return 0;
1469 }
1470
1471 int hci_remote_oob_data_clear(struct hci_dev *hdev)
1472 {
1473 struct oob_data *data, *n;
1474
1475 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1476 list_del(&data->list);
1477 kfree(data);
1478 }
1479
1480 return 0;
1481 }
1482
1483 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1484 u8 *randomizer)
1485 {
1486 struct oob_data *data;
1487
1488 data = hci_find_remote_oob_data(hdev, bdaddr);
1489
1490 if (!data) {
1491 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1492 if (!data)
1493 return -ENOMEM;
1494
1495 bacpy(&data->bdaddr, bdaddr);
1496 list_add(&data->list, &hdev->remote_oob_data);
1497 }
1498
1499 memcpy(data->hash, hash, sizeof(data->hash));
1500 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1501
1502 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1503
1504 return 0;
1505 }
1506
1507 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1508 {
1509 struct bdaddr_list *b;
1510
1511 list_for_each_entry(b, &hdev->blacklist, list)
1512 if (bacmp(bdaddr, &b->bdaddr) == 0)
1513 return b;
1514
1515 return NULL;
1516 }
1517
1518 int hci_blacklist_clear(struct hci_dev *hdev)
1519 {
1520 struct list_head *p, *n;
1521
1522 list_for_each_safe(p, n, &hdev->blacklist) {
1523 struct bdaddr_list *b;
1524
1525 b = list_entry(p, struct bdaddr_list, list);
1526
1527 list_del(p);
1528 kfree(b);
1529 }
1530
1531 return 0;
1532 }
1533
1534 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1535 {
1536 struct bdaddr_list *entry;
1537
1538 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1539 return -EBADF;
1540
1541 if (hci_blacklist_lookup(hdev, bdaddr))
1542 return -EEXIST;
1543
1544 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1545 if (!entry)
1546 return -ENOMEM;
1547
1548 bacpy(&entry->bdaddr, bdaddr);
1549
1550 list_add(&entry->list, &hdev->blacklist);
1551
1552 return mgmt_device_blocked(hdev, bdaddr, type);
1553 }
1554
1555 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1556 {
1557 struct bdaddr_list *entry;
1558
1559 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1560 return hci_blacklist_clear(hdev);
1561
1562 entry = hci_blacklist_lookup(hdev, bdaddr);
1563 if (!entry)
1564 return -ENOENT;
1565
1566 list_del(&entry->list);
1567 kfree(entry);
1568
1569 return mgmt_device_unblocked(hdev, bdaddr, type);
1570 }
1571
1572 static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1573 {
1574 struct le_scan_params *param = (struct le_scan_params *) opt;
1575 struct hci_cp_le_set_scan_param cp;
1576
1577 memset(&cp, 0, sizeof(cp));
1578 cp.type = param->type;
1579 cp.interval = cpu_to_le16(param->interval);
1580 cp.window = cpu_to_le16(param->window);
1581
1582 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1583 }
1584
1585 static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1586 {
1587 struct hci_cp_le_set_scan_enable cp;
1588
1589 memset(&cp, 0, sizeof(cp));
1590 cp.enable = 1;
1591 cp.filter_dup = 1;
1592
1593 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1594 }
1595
1596 static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1597 u16 window, int timeout)
1598 {
1599 long timeo = msecs_to_jiffies(3000);
1600 struct le_scan_params param;
1601 int err;
1602
1603 BT_DBG("%s", hdev->name);
1604
1605 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1606 return -EINPROGRESS;
1607
1608 param.type = type;
1609 param.interval = interval;
1610 param.window = window;
1611
1612 hci_req_lock(hdev);
1613
1614 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
1615 timeo);
1616 if (!err)
1617 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1618
1619 hci_req_unlock(hdev);
1620
1621 if (err < 0)
1622 return err;
1623
1624 schedule_delayed_work(&hdev->le_scan_disable,
1625 msecs_to_jiffies(timeout));
1626
1627 return 0;
1628 }
1629
1630 int hci_cancel_le_scan(struct hci_dev *hdev)
1631 {
1632 BT_DBG("%s", hdev->name);
1633
1634 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1635 return -EALREADY;
1636
1637 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1638 struct hci_cp_le_set_scan_enable cp;
1639
1640 /* Send HCI command to disable LE Scan */
1641 memset(&cp, 0, sizeof(cp));
1642 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1643 }
1644
1645 return 0;
1646 }
1647
1648 static void le_scan_disable_work(struct work_struct *work)
1649 {
1650 struct hci_dev *hdev = container_of(work, struct hci_dev,
1651 le_scan_disable.work);
1652 struct hci_cp_le_set_scan_enable cp;
1653
1654 BT_DBG("%s", hdev->name);
1655
1656 memset(&cp, 0, sizeof(cp));
1657
1658 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1659 }
1660
1661 static void le_scan_work(struct work_struct *work)
1662 {
1663 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1664 struct le_scan_params *param = &hdev->le_scan_params;
1665
1666 BT_DBG("%s", hdev->name);
1667
1668 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1669 param->timeout);
1670 }
1671
1672 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1673 int timeout)
1674 {
1675 struct le_scan_params *param = &hdev->le_scan_params;
1676
1677 BT_DBG("%s", hdev->name);
1678
1679 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1680 return -ENOTSUPP;
1681
1682 if (work_busy(&hdev->le_scan))
1683 return -EINPROGRESS;
1684
1685 param->type = type;
1686 param->interval = interval;
1687 param->window = window;
1688 param->timeout = timeout;
1689
1690 queue_work(system_long_wq, &hdev->le_scan);
1691
1692 return 0;
1693 }
1694
1695 /* Alloc HCI device */
1696 struct hci_dev *hci_alloc_dev(void)
1697 {
1698 struct hci_dev *hdev;
1699
1700 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1701 if (!hdev)
1702 return NULL;
1703
1704 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1705 hdev->esco_type = (ESCO_HV1);
1706 hdev->link_mode = (HCI_LM_ACCEPT);
1707 hdev->io_capability = 0x03; /* No Input No Output */
1708 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
1709 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
1710
1711 hdev->sniff_max_interval = 800;
1712 hdev->sniff_min_interval = 80;
1713
1714 mutex_init(&hdev->lock);
1715 mutex_init(&hdev->req_lock);
1716
1717 INIT_LIST_HEAD(&hdev->mgmt_pending);
1718 INIT_LIST_HEAD(&hdev->blacklist);
1719 INIT_LIST_HEAD(&hdev->uuids);
1720 INIT_LIST_HEAD(&hdev->link_keys);
1721 INIT_LIST_HEAD(&hdev->long_term_keys);
1722 INIT_LIST_HEAD(&hdev->remote_oob_data);
1723 INIT_LIST_HEAD(&hdev->conn_hash.list);
1724
1725 INIT_WORK(&hdev->rx_work, hci_rx_work);
1726 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1727 INIT_WORK(&hdev->tx_work, hci_tx_work);
1728 INIT_WORK(&hdev->power_on, hci_power_on);
1729 INIT_WORK(&hdev->le_scan, le_scan_work);
1730
1731 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1732 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1733 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1734
1735 skb_queue_head_init(&hdev->driver_init);
1736 skb_queue_head_init(&hdev->rx_q);
1737 skb_queue_head_init(&hdev->cmd_q);
1738 skb_queue_head_init(&hdev->raw_q);
1739
1740 init_waitqueue_head(&hdev->req_wait_q);
1741
1742 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
1743
1744 hci_init_sysfs(hdev);
1745 discovery_init(hdev);
1746
1747 return hdev;
1748 }
1749 EXPORT_SYMBOL(hci_alloc_dev);
1750
1751 /* Free HCI device */
1752 void hci_free_dev(struct hci_dev *hdev)
1753 {
1754 skb_queue_purge(&hdev->driver_init);
1755
1756 /* will free via device release */
1757 put_device(&hdev->dev);
1758 }
1759 EXPORT_SYMBOL(hci_free_dev);
1760
1761 /* Register HCI device */
1762 int hci_register_dev(struct hci_dev *hdev)
1763 {
1764 int id, error;
1765
1766 if (!hdev->open || !hdev->close)
1767 return -EINVAL;
1768
1769 /* Do not allow HCI_AMP devices to register at index 0,
1770 * so the index can be used as the AMP controller ID.
1771 */
1772 switch (hdev->dev_type) {
1773 case HCI_BREDR:
1774 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
1775 break;
1776 case HCI_AMP:
1777 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
1778 break;
1779 default:
1780 return -EINVAL;
1781 }
1782
1783 if (id < 0)
1784 return id;
1785
1786 sprintf(hdev->name, "hci%d", id);
1787 hdev->id = id;
1788
1789 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1790
1791 write_lock(&hci_dev_list_lock);
1792 list_add(&hdev->list, &hci_dev_list);
1793 write_unlock(&hci_dev_list_lock);
1794
1795 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1796 WQ_MEM_RECLAIM, 1);
1797 if (!hdev->workqueue) {
1798 error = -ENOMEM;
1799 goto err;
1800 }
1801
1802 error = hci_add_sysfs(hdev);
1803 if (error < 0)
1804 goto err_wqueue;
1805
1806 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1807 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1808 hdev);
1809 if (hdev->rfkill) {
1810 if (rfkill_register(hdev->rfkill) < 0) {
1811 rfkill_destroy(hdev->rfkill);
1812 hdev->rfkill = NULL;
1813 }
1814 }
1815
1816 set_bit(HCI_SETUP, &hdev->dev_flags);
1817
1818 if (hdev->dev_type != HCI_AMP)
1819 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1820
1821 hci_notify(hdev, HCI_DEV_REG);
1822 hci_dev_hold(hdev);
1823
1824 schedule_work(&hdev->power_on);
1825
1826 return id;
1827
1828 err_wqueue:
1829 destroy_workqueue(hdev->workqueue);
1830 err:
1831 ida_simple_remove(&hci_index_ida, hdev->id);
1832 write_lock(&hci_dev_list_lock);
1833 list_del(&hdev->list);
1834 write_unlock(&hci_dev_list_lock);
1835
1836 return error;
1837 }
1838 EXPORT_SYMBOL(hci_register_dev);
1839
1840 /* Unregister HCI device */
1841 void hci_unregister_dev(struct hci_dev *hdev)
1842 {
1843 int i, id;
1844
1845 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1846
1847 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1848
1849 id = hdev->id;
1850
1851 write_lock(&hci_dev_list_lock);
1852 list_del(&hdev->list);
1853 write_unlock(&hci_dev_list_lock);
1854
1855 hci_dev_do_close(hdev);
1856
1857 for (i = 0; i < NUM_REASSEMBLY; i++)
1858 kfree_skb(hdev->reassembly[i]);
1859
1860 cancel_work_sync(&hdev->power_on);
1861
1862 if (!test_bit(HCI_INIT, &hdev->flags) &&
1863 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1864 hci_dev_lock(hdev);
1865 mgmt_index_removed(hdev);
1866 hci_dev_unlock(hdev);
1867 }
1868
1869 /* mgmt_index_removed should take care of emptying the
1870 * pending list */
1871 BUG_ON(!list_empty(&hdev->mgmt_pending));
1872
1873 hci_notify(hdev, HCI_DEV_UNREG);
1874
1875 if (hdev->rfkill) {
1876 rfkill_unregister(hdev->rfkill);
1877 rfkill_destroy(hdev->rfkill);
1878 }
1879
1880 hci_del_sysfs(hdev);
1881
1882 destroy_workqueue(hdev->workqueue);
1883
1884 hci_dev_lock(hdev);
1885 hci_blacklist_clear(hdev);
1886 hci_uuids_clear(hdev);
1887 hci_link_keys_clear(hdev);
1888 hci_smp_ltks_clear(hdev);
1889 hci_remote_oob_data_clear(hdev);
1890 hci_dev_unlock(hdev);
1891
1892 hci_dev_put(hdev);
1893
1894 ida_simple_remove(&hci_index_ida, id);
1895 }
1896 EXPORT_SYMBOL(hci_unregister_dev);
1897
1898 /* Suspend HCI device */
1899 int hci_suspend_dev(struct hci_dev *hdev)
1900 {
1901 hci_notify(hdev, HCI_DEV_SUSPEND);
1902 return 0;
1903 }
1904 EXPORT_SYMBOL(hci_suspend_dev);
1905
1906 /* Resume HCI device */
1907 int hci_resume_dev(struct hci_dev *hdev)
1908 {
1909 hci_notify(hdev, HCI_DEV_RESUME);
1910 return 0;
1911 }
1912 EXPORT_SYMBOL(hci_resume_dev);
1913
1914 /* Receive frame from HCI drivers */
1915 int hci_recv_frame(struct sk_buff *skb)
1916 {
1917 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1918 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1919 && !test_bit(HCI_INIT, &hdev->flags))) {
1920 kfree_skb(skb);
1921 return -ENXIO;
1922 }
1923
1924 /* Incomming skb */
1925 bt_cb(skb)->incoming = 1;
1926
1927 /* Time stamp */
1928 __net_timestamp(skb);
1929
1930 skb_queue_tail(&hdev->rx_q, skb);
1931 queue_work(hdev->workqueue, &hdev->rx_work);
1932
1933 return 0;
1934 }
1935 EXPORT_SYMBOL(hci_recv_frame);
1936
1937 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1938 int count, __u8 index)
1939 {
1940 int len = 0;
1941 int hlen = 0;
1942 int remain = count;
1943 struct sk_buff *skb;
1944 struct bt_skb_cb *scb;
1945
1946 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1947 index >= NUM_REASSEMBLY)
1948 return -EILSEQ;
1949
1950 skb = hdev->reassembly[index];
1951
1952 if (!skb) {
1953 switch (type) {
1954 case HCI_ACLDATA_PKT:
1955 len = HCI_MAX_FRAME_SIZE;
1956 hlen = HCI_ACL_HDR_SIZE;
1957 break;
1958 case HCI_EVENT_PKT:
1959 len = HCI_MAX_EVENT_SIZE;
1960 hlen = HCI_EVENT_HDR_SIZE;
1961 break;
1962 case HCI_SCODATA_PKT:
1963 len = HCI_MAX_SCO_SIZE;
1964 hlen = HCI_SCO_HDR_SIZE;
1965 break;
1966 }
1967
1968 skb = bt_skb_alloc(len, GFP_ATOMIC);
1969 if (!skb)
1970 return -ENOMEM;
1971
1972 scb = (void *) skb->cb;
1973 scb->expect = hlen;
1974 scb->pkt_type = type;
1975
1976 skb->dev = (void *) hdev;
1977 hdev->reassembly[index] = skb;
1978 }
1979
1980 while (count) {
1981 scb = (void *) skb->cb;
1982 len = min_t(uint, scb->expect, count);
1983
1984 memcpy(skb_put(skb, len), data, len);
1985
1986 count -= len;
1987 data += len;
1988 scb->expect -= len;
1989 remain = count;
1990
1991 switch (type) {
1992 case HCI_EVENT_PKT:
1993 if (skb->len == HCI_EVENT_HDR_SIZE) {
1994 struct hci_event_hdr *h = hci_event_hdr(skb);
1995 scb->expect = h->plen;
1996
1997 if (skb_tailroom(skb) < scb->expect) {
1998 kfree_skb(skb);
1999 hdev->reassembly[index] = NULL;
2000 return -ENOMEM;
2001 }
2002 }
2003 break;
2004
2005 case HCI_ACLDATA_PKT:
2006 if (skb->len == HCI_ACL_HDR_SIZE) {
2007 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2008 scb->expect = __le16_to_cpu(h->dlen);
2009
2010 if (skb_tailroom(skb) < scb->expect) {
2011 kfree_skb(skb);
2012 hdev->reassembly[index] = NULL;
2013 return -ENOMEM;
2014 }
2015 }
2016 break;
2017
2018 case HCI_SCODATA_PKT:
2019 if (skb->len == HCI_SCO_HDR_SIZE) {
2020 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2021 scb->expect = h->dlen;
2022
2023 if (skb_tailroom(skb) < scb->expect) {
2024 kfree_skb(skb);
2025 hdev->reassembly[index] = NULL;
2026 return -ENOMEM;
2027 }
2028 }
2029 break;
2030 }
2031
2032 if (scb->expect == 0) {
2033 /* Complete frame */
2034
2035 bt_cb(skb)->pkt_type = type;
2036 hci_recv_frame(skb);
2037
2038 hdev->reassembly[index] = NULL;
2039 return remain;
2040 }
2041 }
2042
2043 return remain;
2044 }
2045
2046 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2047 {
2048 int rem = 0;
2049
2050 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2051 return -EILSEQ;
2052
2053 while (count) {
2054 rem = hci_reassembly(hdev, type, data, count, type - 1);
2055 if (rem < 0)
2056 return rem;
2057
2058 data += (count - rem);
2059 count = rem;
2060 }
2061
2062 return rem;
2063 }
2064 EXPORT_SYMBOL(hci_recv_fragment);
2065
2066 #define STREAM_REASSEMBLY 0
2067
2068 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2069 {
2070 int type;
2071 int rem = 0;
2072
2073 while (count) {
2074 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2075
2076 if (!skb) {
2077 struct { char type; } *pkt;
2078
2079 /* Start of the frame */
2080 pkt = data;
2081 type = pkt->type;
2082
2083 data++;
2084 count--;
2085 } else
2086 type = bt_cb(skb)->pkt_type;
2087
2088 rem = hci_reassembly(hdev, type, data, count,
2089 STREAM_REASSEMBLY);
2090 if (rem < 0)
2091 return rem;
2092
2093 data += (count - rem);
2094 count = rem;
2095 }
2096
2097 return rem;
2098 }
2099 EXPORT_SYMBOL(hci_recv_stream_fragment);
2100
2101 /* ---- Interface to upper protocols ---- */
2102
2103 int hci_register_cb(struct hci_cb *cb)
2104 {
2105 BT_DBG("%p name %s", cb, cb->name);
2106
2107 write_lock(&hci_cb_list_lock);
2108 list_add(&cb->list, &hci_cb_list);
2109 write_unlock(&hci_cb_list_lock);
2110
2111 return 0;
2112 }
2113 EXPORT_SYMBOL(hci_register_cb);
2114
2115 int hci_unregister_cb(struct hci_cb *cb)
2116 {
2117 BT_DBG("%p name %s", cb, cb->name);
2118
2119 write_lock(&hci_cb_list_lock);
2120 list_del(&cb->list);
2121 write_unlock(&hci_cb_list_lock);
2122
2123 return 0;
2124 }
2125 EXPORT_SYMBOL(hci_unregister_cb);
2126
2127 static int hci_send_frame(struct sk_buff *skb)
2128 {
2129 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2130
2131 if (!hdev) {
2132 kfree_skb(skb);
2133 return -ENODEV;
2134 }
2135
2136 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2137
2138 /* Time stamp */
2139 __net_timestamp(skb);
2140
2141 /* Send copy to monitor */
2142 hci_send_to_monitor(hdev, skb);
2143
2144 if (atomic_read(&hdev->promisc)) {
2145 /* Send copy to the sockets */
2146 hci_send_to_sock(hdev, skb);
2147 }
2148
2149 /* Get rid of skb owner, prior to sending to the driver. */
2150 skb_orphan(skb);
2151
2152 return hdev->send(skb);
2153 }
2154
2155 /* Send HCI command */
2156 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2157 {
2158 int len = HCI_COMMAND_HDR_SIZE + plen;
2159 struct hci_command_hdr *hdr;
2160 struct sk_buff *skb;
2161
2162 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2163
2164 skb = bt_skb_alloc(len, GFP_ATOMIC);
2165 if (!skb) {
2166 BT_ERR("%s no memory for command", hdev->name);
2167 return -ENOMEM;
2168 }
2169
2170 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2171 hdr->opcode = cpu_to_le16(opcode);
2172 hdr->plen = plen;
2173
2174 if (plen)
2175 memcpy(skb_put(skb, plen), param, plen);
2176
2177 BT_DBG("skb len %d", skb->len);
2178
2179 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2180 skb->dev = (void *) hdev;
2181
2182 if (test_bit(HCI_INIT, &hdev->flags))
2183 hdev->init_last_cmd = opcode;
2184
2185 skb_queue_tail(&hdev->cmd_q, skb);
2186 queue_work(hdev->workqueue, &hdev->cmd_work);
2187
2188 return 0;
2189 }
2190
2191 /* Get data from the previously sent command */
2192 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2193 {
2194 struct hci_command_hdr *hdr;
2195
2196 if (!hdev->sent_cmd)
2197 return NULL;
2198
2199 hdr = (void *) hdev->sent_cmd->data;
2200
2201 if (hdr->opcode != cpu_to_le16(opcode))
2202 return NULL;
2203
2204 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
2205
2206 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2207 }
2208
2209 /* Send ACL data */
2210 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2211 {
2212 struct hci_acl_hdr *hdr;
2213 int len = skb->len;
2214
2215 skb_push(skb, HCI_ACL_HDR_SIZE);
2216 skb_reset_transport_header(skb);
2217 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2218 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2219 hdr->dlen = cpu_to_le16(len);
2220 }
2221
2222 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
2223 struct sk_buff *skb, __u16 flags)
2224 {
2225 struct hci_conn *conn = chan->conn;
2226 struct hci_dev *hdev = conn->hdev;
2227 struct sk_buff *list;
2228
2229 skb->len = skb_headlen(skb);
2230 skb->data_len = 0;
2231
2232 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2233
2234 switch (hdev->dev_type) {
2235 case HCI_BREDR:
2236 hci_add_acl_hdr(skb, conn->handle, flags);
2237 break;
2238 case HCI_AMP:
2239 hci_add_acl_hdr(skb, chan->handle, flags);
2240 break;
2241 default:
2242 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2243 return;
2244 }
2245
2246 list = skb_shinfo(skb)->frag_list;
2247 if (!list) {
2248 /* Non fragmented */
2249 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2250
2251 skb_queue_tail(queue, skb);
2252 } else {
2253 /* Fragmented */
2254 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2255
2256 skb_shinfo(skb)->frag_list = NULL;
2257
2258 /* Queue all fragments atomically */
2259 spin_lock(&queue->lock);
2260
2261 __skb_queue_tail(queue, skb);
2262
2263 flags &= ~ACL_START;
2264 flags |= ACL_CONT;
2265 do {
2266 skb = list; list = list->next;
2267
2268 skb->dev = (void *) hdev;
2269 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2270 hci_add_acl_hdr(skb, conn->handle, flags);
2271
2272 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2273
2274 __skb_queue_tail(queue, skb);
2275 } while (list);
2276
2277 spin_unlock(&queue->lock);
2278 }
2279 }
2280
2281 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2282 {
2283 struct hci_dev *hdev = chan->conn->hdev;
2284
2285 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
2286
2287 skb->dev = (void *) hdev;
2288
2289 hci_queue_acl(chan, &chan->data_q, skb, flags);
2290
2291 queue_work(hdev->workqueue, &hdev->tx_work);
2292 }
2293
2294 /* Send SCO data */
2295 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2296 {
2297 struct hci_dev *hdev = conn->hdev;
2298 struct hci_sco_hdr hdr;
2299
2300 BT_DBG("%s len %d", hdev->name, skb->len);
2301
2302 hdr.handle = cpu_to_le16(conn->handle);
2303 hdr.dlen = skb->len;
2304
2305 skb_push(skb, HCI_SCO_HDR_SIZE);
2306 skb_reset_transport_header(skb);
2307 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2308
2309 skb->dev = (void *) hdev;
2310 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2311
2312 skb_queue_tail(&conn->data_q, skb);
2313 queue_work(hdev->workqueue, &hdev->tx_work);
2314 }
2315
2316 /* ---- HCI TX task (outgoing data) ---- */
2317
2318 /* HCI Connection scheduler */
2319 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2320 int *quote)
2321 {
2322 struct hci_conn_hash *h = &hdev->conn_hash;
2323 struct hci_conn *conn = NULL, *c;
2324 unsigned int num = 0, min = ~0;
2325
2326 /* We don't have to lock device here. Connections are always
2327 * added and removed with TX task disabled. */
2328
2329 rcu_read_lock();
2330
2331 list_for_each_entry_rcu(c, &h->list, list) {
2332 if (c->type != type || skb_queue_empty(&c->data_q))
2333 continue;
2334
2335 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2336 continue;
2337
2338 num++;
2339
2340 if (c->sent < min) {
2341 min = c->sent;
2342 conn = c;
2343 }
2344
2345 if (hci_conn_num(hdev, type) == num)
2346 break;
2347 }
2348
2349 rcu_read_unlock();
2350
2351 if (conn) {
2352 int cnt, q;
2353
2354 switch (conn->type) {
2355 case ACL_LINK:
2356 cnt = hdev->acl_cnt;
2357 break;
2358 case SCO_LINK:
2359 case ESCO_LINK:
2360 cnt = hdev->sco_cnt;
2361 break;
2362 case LE_LINK:
2363 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2364 break;
2365 default:
2366 cnt = 0;
2367 BT_ERR("Unknown link type");
2368 }
2369
2370 q = cnt / num;
2371 *quote = q ? q : 1;
2372 } else
2373 *quote = 0;
2374
2375 BT_DBG("conn %p quote %d", conn, *quote);
2376 return conn;
2377 }
2378
2379 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2380 {
2381 struct hci_conn_hash *h = &hdev->conn_hash;
2382 struct hci_conn *c;
2383
2384 BT_ERR("%s link tx timeout", hdev->name);
2385
2386 rcu_read_lock();
2387
2388 /* Kill stalled connections */
2389 list_for_each_entry_rcu(c, &h->list, list) {
2390 if (c->type == type && c->sent) {
2391 BT_ERR("%s killing stalled connection %pMR",
2392 hdev->name, &c->dst);
2393 hci_acl_disconn(c, HCI_ERROR_REMOTE_USER_TERM);
2394 }
2395 }
2396
2397 rcu_read_unlock();
2398 }
2399
2400 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2401 int *quote)
2402 {
2403 struct hci_conn_hash *h = &hdev->conn_hash;
2404 struct hci_chan *chan = NULL;
2405 unsigned int num = 0, min = ~0, cur_prio = 0;
2406 struct hci_conn *conn;
2407 int cnt, q, conn_num = 0;
2408
2409 BT_DBG("%s", hdev->name);
2410
2411 rcu_read_lock();
2412
2413 list_for_each_entry_rcu(conn, &h->list, list) {
2414 struct hci_chan *tmp;
2415
2416 if (conn->type != type)
2417 continue;
2418
2419 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2420 continue;
2421
2422 conn_num++;
2423
2424 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2425 struct sk_buff *skb;
2426
2427 if (skb_queue_empty(&tmp->data_q))
2428 continue;
2429
2430 skb = skb_peek(&tmp->data_q);
2431 if (skb->priority < cur_prio)
2432 continue;
2433
2434 if (skb->priority > cur_prio) {
2435 num = 0;
2436 min = ~0;
2437 cur_prio = skb->priority;
2438 }
2439
2440 num++;
2441
2442 if (conn->sent < min) {
2443 min = conn->sent;
2444 chan = tmp;
2445 }
2446 }
2447
2448 if (hci_conn_num(hdev, type) == conn_num)
2449 break;
2450 }
2451
2452 rcu_read_unlock();
2453
2454 if (!chan)
2455 return NULL;
2456
2457 switch (chan->conn->type) {
2458 case ACL_LINK:
2459 cnt = hdev->acl_cnt;
2460 break;
2461 case AMP_LINK:
2462 cnt = hdev->block_cnt;
2463 break;
2464 case SCO_LINK:
2465 case ESCO_LINK:
2466 cnt = hdev->sco_cnt;
2467 break;
2468 case LE_LINK:
2469 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2470 break;
2471 default:
2472 cnt = 0;
2473 BT_ERR("Unknown link type");
2474 }
2475
2476 q = cnt / num;
2477 *quote = q ? q : 1;
2478 BT_DBG("chan %p quote %d", chan, *quote);
2479 return chan;
2480 }
2481
2482 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2483 {
2484 struct hci_conn_hash *h = &hdev->conn_hash;
2485 struct hci_conn *conn;
2486 int num = 0;
2487
2488 BT_DBG("%s", hdev->name);
2489
2490 rcu_read_lock();
2491
2492 list_for_each_entry_rcu(conn, &h->list, list) {
2493 struct hci_chan *chan;
2494
2495 if (conn->type != type)
2496 continue;
2497
2498 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2499 continue;
2500
2501 num++;
2502
2503 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
2504 struct sk_buff *skb;
2505
2506 if (chan->sent) {
2507 chan->sent = 0;
2508 continue;
2509 }
2510
2511 if (skb_queue_empty(&chan->data_q))
2512 continue;
2513
2514 skb = skb_peek(&chan->data_q);
2515 if (skb->priority >= HCI_PRIO_MAX - 1)
2516 continue;
2517
2518 skb->priority = HCI_PRIO_MAX - 1;
2519
2520 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2521 skb->priority);
2522 }
2523
2524 if (hci_conn_num(hdev, type) == num)
2525 break;
2526 }
2527
2528 rcu_read_unlock();
2529
2530 }
2531
2532 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2533 {
2534 /* Calculate count of blocks used by this packet */
2535 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2536 }
2537
2538 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
2539 {
2540 if (!test_bit(HCI_RAW, &hdev->flags)) {
2541 /* ACL tx timeout must be longer than maximum
2542 * link supervision timeout (40.9 seconds) */
2543 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
2544 HCI_ACL_TX_TIMEOUT))
2545 hci_link_tx_to(hdev, ACL_LINK);
2546 }
2547 }
2548
2549 static void hci_sched_acl_pkt(struct hci_dev *hdev)
2550 {
2551 unsigned int cnt = hdev->acl_cnt;
2552 struct hci_chan *chan;
2553 struct sk_buff *skb;
2554 int quote;
2555
2556 __check_timeout(hdev, cnt);
2557
2558 while (hdev->acl_cnt &&
2559 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2560 u32 priority = (skb_peek(&chan->data_q))->priority;
2561 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2562 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2563 skb->len, skb->priority);
2564
2565 /* Stop if priority has changed */
2566 if (skb->priority < priority)
2567 break;
2568
2569 skb = skb_dequeue(&chan->data_q);
2570
2571 hci_conn_enter_active_mode(chan->conn,
2572 bt_cb(skb)->force_active);
2573
2574 hci_send_frame(skb);
2575 hdev->acl_last_tx = jiffies;
2576
2577 hdev->acl_cnt--;
2578 chan->sent++;
2579 chan->conn->sent++;
2580 }
2581 }
2582
2583 if (cnt != hdev->acl_cnt)
2584 hci_prio_recalculate(hdev, ACL_LINK);
2585 }
2586
2587 static void hci_sched_acl_blk(struct hci_dev *hdev)
2588 {
2589 unsigned int cnt = hdev->block_cnt;
2590 struct hci_chan *chan;
2591 struct sk_buff *skb;
2592 int quote;
2593 u8 type;
2594
2595 __check_timeout(hdev, cnt);
2596
2597 BT_DBG("%s", hdev->name);
2598
2599 if (hdev->dev_type == HCI_AMP)
2600 type = AMP_LINK;
2601 else
2602 type = ACL_LINK;
2603
2604 while (hdev->block_cnt > 0 &&
2605 (chan = hci_chan_sent(hdev, type, &quote))) {
2606 u32 priority = (skb_peek(&chan->data_q))->priority;
2607 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2608 int blocks;
2609
2610 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2611 skb->len, skb->priority);
2612
2613 /* Stop if priority has changed */
2614 if (skb->priority < priority)
2615 break;
2616
2617 skb = skb_dequeue(&chan->data_q);
2618
2619 blocks = __get_blocks(hdev, skb);
2620 if (blocks > hdev->block_cnt)
2621 return;
2622
2623 hci_conn_enter_active_mode(chan->conn,
2624 bt_cb(skb)->force_active);
2625
2626 hci_send_frame(skb);
2627 hdev->acl_last_tx = jiffies;
2628
2629 hdev->block_cnt -= blocks;
2630 quote -= blocks;
2631
2632 chan->sent += blocks;
2633 chan->conn->sent += blocks;
2634 }
2635 }
2636
2637 if (cnt != hdev->block_cnt)
2638 hci_prio_recalculate(hdev, type);
2639 }
2640
2641 static void hci_sched_acl(struct hci_dev *hdev)
2642 {
2643 BT_DBG("%s", hdev->name);
2644
2645 /* No ACL link over BR/EDR controller */
2646 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
2647 return;
2648
2649 /* No AMP link over AMP controller */
2650 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
2651 return;
2652
2653 switch (hdev->flow_ctl_mode) {
2654 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2655 hci_sched_acl_pkt(hdev);
2656 break;
2657
2658 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2659 hci_sched_acl_blk(hdev);
2660 break;
2661 }
2662 }
2663
2664 /* Schedule SCO */
2665 static void hci_sched_sco(struct hci_dev *hdev)
2666 {
2667 struct hci_conn *conn;
2668 struct sk_buff *skb;
2669 int quote;
2670
2671 BT_DBG("%s", hdev->name);
2672
2673 if (!hci_conn_num(hdev, SCO_LINK))
2674 return;
2675
2676 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2677 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2678 BT_DBG("skb %p len %d", skb, skb->len);
2679 hci_send_frame(skb);
2680
2681 conn->sent++;
2682 if (conn->sent == ~0)
2683 conn->sent = 0;
2684 }
2685 }
2686 }
2687
2688 static void hci_sched_esco(struct hci_dev *hdev)
2689 {
2690 struct hci_conn *conn;
2691 struct sk_buff *skb;
2692 int quote;
2693
2694 BT_DBG("%s", hdev->name);
2695
2696 if (!hci_conn_num(hdev, ESCO_LINK))
2697 return;
2698
2699 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2700 &quote))) {
2701 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2702 BT_DBG("skb %p len %d", skb, skb->len);
2703 hci_send_frame(skb);
2704
2705 conn->sent++;
2706 if (conn->sent == ~0)
2707 conn->sent = 0;
2708 }
2709 }
2710 }
2711
2712 static void hci_sched_le(struct hci_dev *hdev)
2713 {
2714 struct hci_chan *chan;
2715 struct sk_buff *skb;
2716 int quote, cnt, tmp;
2717
2718 BT_DBG("%s", hdev->name);
2719
2720 if (!hci_conn_num(hdev, LE_LINK))
2721 return;
2722
2723 if (!test_bit(HCI_RAW, &hdev->flags)) {
2724 /* LE tx timeout must be longer than maximum
2725 * link supervision timeout (40.9 seconds) */
2726 if (!hdev->le_cnt && hdev->le_pkts &&
2727 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2728 hci_link_tx_to(hdev, LE_LINK);
2729 }
2730
2731 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2732 tmp = cnt;
2733 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
2734 u32 priority = (skb_peek(&chan->data_q))->priority;
2735 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2736 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2737 skb->len, skb->priority);
2738
2739 /* Stop if priority has changed */
2740 if (skb->priority < priority)
2741 break;
2742
2743 skb = skb_dequeue(&chan->data_q);
2744
2745 hci_send_frame(skb);
2746 hdev->le_last_tx = jiffies;
2747
2748 cnt--;
2749 chan->sent++;
2750 chan->conn->sent++;
2751 }
2752 }
2753
2754 if (hdev->le_pkts)
2755 hdev->le_cnt = cnt;
2756 else
2757 hdev->acl_cnt = cnt;
2758
2759 if (cnt != tmp)
2760 hci_prio_recalculate(hdev, LE_LINK);
2761 }
2762
2763 static void hci_tx_work(struct work_struct *work)
2764 {
2765 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
2766 struct sk_buff *skb;
2767
2768 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2769 hdev->sco_cnt, hdev->le_cnt);
2770
2771 /* Schedule queues and send stuff to HCI driver */
2772
2773 hci_sched_acl(hdev);
2774
2775 hci_sched_sco(hdev);
2776
2777 hci_sched_esco(hdev);
2778
2779 hci_sched_le(hdev);
2780
2781 /* Send next queued raw (unknown type) packet */
2782 while ((skb = skb_dequeue(&hdev->raw_q)))
2783 hci_send_frame(skb);
2784 }
2785
2786 /* ----- HCI RX task (incoming data processing) ----- */
2787
2788 /* ACL data packet */
2789 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2790 {
2791 struct hci_acl_hdr *hdr = (void *) skb->data;
2792 struct hci_conn *conn;
2793 __u16 handle, flags;
2794
2795 skb_pull(skb, HCI_ACL_HDR_SIZE);
2796
2797 handle = __le16_to_cpu(hdr->handle);
2798 flags = hci_flags(handle);
2799 handle = hci_handle(handle);
2800
2801 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
2802 handle, flags);
2803
2804 hdev->stat.acl_rx++;
2805
2806 hci_dev_lock(hdev);
2807 conn = hci_conn_hash_lookup_handle(hdev, handle);
2808 hci_dev_unlock(hdev);
2809
2810 if (conn) {
2811 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
2812
2813 hci_dev_lock(hdev);
2814 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2815 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2816 mgmt_device_connected(hdev, &conn->dst, conn->type,
2817 conn->dst_type, 0, NULL, 0,
2818 conn->dev_class);
2819 hci_dev_unlock(hdev);
2820
2821 /* Send to upper protocol */
2822 l2cap_recv_acldata(conn, skb, flags);
2823 return;
2824 } else {
2825 BT_ERR("%s ACL packet for unknown connection handle %d",
2826 hdev->name, handle);
2827 }
2828
2829 kfree_skb(skb);
2830 }
2831
2832 /* SCO data packet */
2833 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2834 {
2835 struct hci_sco_hdr *hdr = (void *) skb->data;
2836 struct hci_conn *conn;
2837 __u16 handle;
2838
2839 skb_pull(skb, HCI_SCO_HDR_SIZE);
2840
2841 handle = __le16_to_cpu(hdr->handle);
2842
2843 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
2844
2845 hdev->stat.sco_rx++;
2846
2847 hci_dev_lock(hdev);
2848 conn = hci_conn_hash_lookup_handle(hdev, handle);
2849 hci_dev_unlock(hdev);
2850
2851 if (conn) {
2852 /* Send to upper protocol */
2853 sco_recv_scodata(conn, skb);
2854 return;
2855 } else {
2856 BT_ERR("%s SCO packet for unknown connection handle %d",
2857 hdev->name, handle);
2858 }
2859
2860 kfree_skb(skb);
2861 }
2862
2863 static void hci_rx_work(struct work_struct *work)
2864 {
2865 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
2866 struct sk_buff *skb;
2867
2868 BT_DBG("%s", hdev->name);
2869
2870 while ((skb = skb_dequeue(&hdev->rx_q))) {
2871 /* Send copy to monitor */
2872 hci_send_to_monitor(hdev, skb);
2873
2874 if (atomic_read(&hdev->promisc)) {
2875 /* Send copy to the sockets */
2876 hci_send_to_sock(hdev, skb);
2877 }
2878
2879 if (test_bit(HCI_RAW, &hdev->flags)) {
2880 kfree_skb(skb);
2881 continue;
2882 }
2883
2884 if (test_bit(HCI_INIT, &hdev->flags)) {
2885 /* Don't process data packets in this states. */
2886 switch (bt_cb(skb)->pkt_type) {
2887 case HCI_ACLDATA_PKT:
2888 case HCI_SCODATA_PKT:
2889 kfree_skb(skb);
2890 continue;
2891 }
2892 }
2893
2894 /* Process frame */
2895 switch (bt_cb(skb)->pkt_type) {
2896 case HCI_EVENT_PKT:
2897 BT_DBG("%s Event packet", hdev->name);
2898 hci_event_packet(hdev, skb);
2899 break;
2900
2901 case HCI_ACLDATA_PKT:
2902 BT_DBG("%s ACL data packet", hdev->name);
2903 hci_acldata_packet(hdev, skb);
2904 break;
2905
2906 case HCI_SCODATA_PKT:
2907 BT_DBG("%s SCO data packet", hdev->name);
2908 hci_scodata_packet(hdev, skb);
2909 break;
2910
2911 default:
2912 kfree_skb(skb);
2913 break;
2914 }
2915 }
2916 }
2917
2918 static void hci_cmd_work(struct work_struct *work)
2919 {
2920 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
2921 struct sk_buff *skb;
2922
2923 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
2924 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
2925
2926 /* Send queued commands */
2927 if (atomic_read(&hdev->cmd_cnt)) {
2928 skb = skb_dequeue(&hdev->cmd_q);
2929 if (!skb)
2930 return;
2931
2932 kfree_skb(hdev->sent_cmd);
2933
2934 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2935 if (hdev->sent_cmd) {
2936 atomic_dec(&hdev->cmd_cnt);
2937 hci_send_frame(skb);
2938 if (test_bit(HCI_RESET, &hdev->flags))
2939 del_timer(&hdev->cmd_timer);
2940 else
2941 mod_timer(&hdev->cmd_timer,
2942 jiffies + HCI_CMD_TIMEOUT);
2943 } else {
2944 skb_queue_head(&hdev->cmd_q, skb);
2945 queue_work(hdev->workqueue, &hdev->cmd_work);
2946 }
2947 }
2948 }
2949
2950 int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2951 {
2952 /* General inquiry access code (GIAC) */
2953 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2954 struct hci_cp_inquiry cp;
2955
2956 BT_DBG("%s", hdev->name);
2957
2958 if (test_bit(HCI_INQUIRY, &hdev->flags))
2959 return -EINPROGRESS;
2960
2961 inquiry_cache_flush(hdev);
2962
2963 memset(&cp, 0, sizeof(cp));
2964 memcpy(&cp.lap, lap, sizeof(cp.lap));
2965 cp.length = length;
2966
2967 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2968 }
2969
2970 int hci_cancel_inquiry(struct hci_dev *hdev)
2971 {
2972 BT_DBG("%s", hdev->name);
2973
2974 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2975 return -EALREADY;
2976
2977 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2978 }
2979
2980 u8 bdaddr_to_le(u8 bdaddr_type)
2981 {
2982 switch (bdaddr_type) {
2983 case BDADDR_LE_PUBLIC:
2984 return ADDR_LE_DEV_PUBLIC;
2985
2986 default:
2987 /* Fallback to LE Random address type */
2988 return ADDR_LE_DEV_RANDOM;
2989 }
2990 }
Linus' kernel tree