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Bluetooth: bluecard_cs: Shorten scope for iobase
[linux-block.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
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
1da177e4 30
8c520a59 31#include <linux/rfkill.h>
1da177e4
LT		 32
33#include <net/bluetooth/bluetooth.h>
34#include <net/bluetooth/hci_core.h>
35
b78752cc 36static void hci_rx_work(struct work_struct *work);
c347b765 37static void hci_cmd_work(struct work_struct *work);
3eff45ea 38static void hci_tx_work(struct work_struct *work);
1da177e4 39
1da177e4
LT		 40/* HCI device list */
41LIST_HEAD(hci_dev_list);
42DEFINE_RWLOCK(hci_dev_list_lock);
43
44/* HCI callback list */
45LIST_HEAD(hci_cb_list);
46DEFINE_RWLOCK(hci_cb_list_lock);
47
3df92b31
SL		 48/* HCI ID Numbering */
49static DEFINE_IDA(hci_index_ida);
50
1da177e4
LT		 51/* ---- HCI notifications ---- */
52
6516455d 53static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 54{
040030ef 55 hci_sock_dev_event(hdev, event);
1da177e4
LT		 56}
57
58/* ---- HCI requests ---- */
59
23bb5763 60void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 61{
f0e09510 62 BT_DBG("%s command 0x%4.4x result 0x%2.2x", hdev->name, cmd, result);
23bb5763 63
a5040efa
JH		 64 /* If this is the init phase check if the completed command matches
65 * the last init command, and if not just return.
66 */
75fb0e32
JH		 67 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
68 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1036b890 69 u16 opcode = __le16_to_cpu(sent->opcode);
75fb0e32
JH		 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
1036b890 79 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
75fb0e32
JH		 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
23bb5763 88 return;
75fb0e32 89 }
1da177e4
LT		 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
98static 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. */
a8c5fb1a
GP		 110static int __hci_request(struct hci_dev *hdev,
111 void (*req)(struct hci_dev *hdev, unsigned long opt),
112 unsigned long opt, __u32 timeout)
1da177e4
LT		 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:
e175072f 134 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 135 break;
136
137 case HCI_REQ_CANCELED:
138 err = -hdev->req_result;
139 break;
140
141 default:
142 err = -ETIMEDOUT;
143 break;
3ff50b79 144 }
1da177e4 145
a5040efa 146 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 147
148 BT_DBG("%s end: err %d", hdev->name, err);
149
150 return err;
151}
152
6039aa73
GP		 153static int hci_request(struct hci_dev *hdev,
154 void (*req)(struct hci_dev *hdev, unsigned long opt),
155 unsigned long opt, __u32 timeout)
1da177e4
LT		 156{
157 int ret;
158
7c6a329e
MH		 159 if (!test_bit(HCI_UP, &hdev->flags))
160 return -ENETDOWN;
161
1da177e4
LT		 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
170static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
171{
172 BT_DBG("%s %ld", hdev->name, opt);
173
174 /* Reset device */
f630cf0d 175 set_bit(HCI_RESET, &hdev->flags);
a9de9248 176 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 177}
178
e61ef499 179static void bredr_init(struct hci_dev *hdev)
1da177e4 180{
b0916ea0 181 struct hci_cp_delete_stored_link_key cp;
1ebb9252 182 __le16 param;
89f2783d 183 __u8 flt_type;
1da177e4 184
2455a3ea
AE		 185 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
186
1da177e4
LT		 187 /* Mandatory initialization */
188
1da177e4 189 /* Read Local Supported Features */
a9de9248 190 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 191
1143e5a6 192 /* Read Local Version */
a9de9248 193 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 194
1da177e4 195 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 196 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 197
1da177e4 198 /* Read BD Address */
a9de9248
MH		 199 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
200
201 /* Read Class of Device */
202 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
203
204 /* Read Local Name */
205 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 206
207 /* Read Voice Setting */
a9de9248 208 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 209
210 /* Optional initialization */
211
212 /* Clear Event Filters */
89f2783d 213 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 214 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 215
1da177e4 216 /* Connection accept timeout ~20 secs */
82781e63 217 param = __constant_cpu_to_le16(0x7d00);
a9de9248 218 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 219
220 bacpy(&cp.bdaddr, BDADDR_ANY);
221 cp.delete_all = 1;
222 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 223}
224
e61ef499
AE		 225static void amp_init(struct hci_dev *hdev)
226{
2455a3ea
AE		 227 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
228
e61ef499
AE		 229 /* Read Local Version */
230 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 231
232 /* Read Local AMP Info */
233 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e61ef499
AE		 234}
235
236static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
237{
238 struct sk_buff *skb;
239
240 BT_DBG("%s %ld", hdev->name, opt);
241
242 /* Driver initialization */
243
244 /* Special commands */
245 while ((skb = skb_dequeue(&hdev->driver_init))) {
246 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
247 skb->dev = (void *) hdev;
248
249 skb_queue_tail(&hdev->cmd_q, skb);
250 queue_work(hdev->workqueue, &hdev->cmd_work);
251 }
252 skb_queue_purge(&hdev->driver_init);
253
11778716
AE		 254 /* Reset */
255 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
256 hci_reset_req(hdev, 0);
257
e61ef499
AE		 258 switch (hdev->dev_type) {
259 case HCI_BREDR:
260 bredr_init(hdev);
261 break;
262
263 case HCI_AMP:
264 amp_init(hdev);
265 break;
266
267 default:
268 BT_ERR("Unknown device type %d", hdev->dev_type);
269 break;
270 }
271
272}
273
6ed58ec5
VT		 274static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
275{
276 BT_DBG("%s", hdev->name);
277
278 /* Read LE buffer size */
279 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
280}
281
1da177e4
LT		 282static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
283{
284 __u8 scan = opt;
285
286 BT_DBG("%s %x", hdev->name, scan);
287
288 /* Inquiry and Page scans */
a9de9248 289 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 290}
291
292static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
293{
294 __u8 auth = opt;
295
296 BT_DBG("%s %x", hdev->name, auth);
297
298 /* Authentication */
a9de9248 299 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 300}
301
302static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
303{
304 __u8 encrypt = opt;
305
306 BT_DBG("%s %x", hdev->name, encrypt);
307
e4e8e37c 308 /* Encryption */
a9de9248 309 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 310}
311
e4e8e37c
MH		 312static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
313{
314 __le16 policy = cpu_to_le16(opt);
315
a418b893 316 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 317
318 /* Default link policy */
319 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
320}
321
8e87d142 322/* Get HCI device by index.
1da177e4
LT		 323 * Device is held on return. */
324struct hci_dev *hci_dev_get(int index)
325{
8035ded4 326 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 327
328 BT_DBG("%d", index);
329
330 if (index < 0)
331 return NULL;
332
333 read_lock(&hci_dev_list_lock);
8035ded4 334 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 335 if (d->id == index) {
336 hdev = hci_dev_hold(d);
337 break;
338 }
339 }
340 read_unlock(&hci_dev_list_lock);
341 return hdev;
342}
1da177e4
LT		 343
344/* ---- Inquiry support ---- */
ff9ef578 345
30dc78e1
JH		 346bool hci_discovery_active(struct hci_dev *hdev)
347{
348 struct discovery_state *discov = &hdev->discovery;
349
6fbe195d 350 switch (discov->state) {
343f935b 351 case DISCOVERY_FINDING:
6fbe195d 352 case DISCOVERY_RESOLVING:
30dc78e1
JH		 353 return true;
354
6fbe195d
AG		 355 default:
356 return false;
357 }
30dc78e1
JH		 358}
359
ff9ef578
JH		 360void hci_discovery_set_state(struct hci_dev *hdev, int state)
361{
362 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
363
364 if (hdev->discovery.state == state)
365 return;
366
367 switch (state) {
368 case DISCOVERY_STOPPED:
7b99b659
AG		 369 if (hdev->discovery.state != DISCOVERY_STARTING)
370 mgmt_discovering(hdev, 0);
ff9ef578
JH		 371 break;
372 case DISCOVERY_STARTING:
373 break;
343f935b 374 case DISCOVERY_FINDING:
ff9ef578
JH		 375 mgmt_discovering(hdev, 1);
376 break;
30dc78e1
JH		 377 case DISCOVERY_RESOLVING:
378 break;
ff9ef578
JH		 379 case DISCOVERY_STOPPING:
380 break;
381 }
382
383 hdev->discovery.state = state;
384}
385
1da177e4
LT		 386static void inquiry_cache_flush(struct hci_dev *hdev)
387{
30883512 388 struct discovery_state *cache = &hdev->discovery;
b57c1a56 389 struct inquiry_entry *p, *n;
1da177e4 390
561aafbc
JH		 391 list_for_each_entry_safe(p, n, &cache->all, all) {
392 list_del(&p->all);
b57c1a56 393 kfree(p);
1da177e4 394 }
561aafbc
JH		 395
396 INIT_LIST_HEAD(&cache->unknown);
397 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 398}
399
a8c5fb1a
GP		 400struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
401 bdaddr_t *bdaddr)
1da177e4 402{
30883512 403 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 404 struct inquiry_entry *e;
405
406 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
407
561aafbc
JH		 408 list_for_each_entry(e, &cache->all, all) {
409 if (!bacmp(&e->data.bdaddr, bdaddr))
410 return e;
411 }
412
413 return NULL;
414}
415
416struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 417 bdaddr_t *bdaddr)
561aafbc 418{
30883512 419 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 420 struct inquiry_entry *e;
421
422 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
423
424 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 425 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 426 return e;
427 }
428
429 return NULL;
1da177e4
LT		 430}
431
30dc78e1 432struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 433 bdaddr_t *bdaddr,
434 int state)
30dc78e1
JH		 435{
436 struct discovery_state *cache = &hdev->discovery;
437 struct inquiry_entry *e;
438
439 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
440
441 list_for_each_entry(e, &cache->resolve, list) {
442 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
443 return e;
444 if (!bacmp(&e->data.bdaddr, bdaddr))
445 return e;
446 }
447
448 return NULL;
449}
450
a3d4e20a 451void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 452 struct inquiry_entry *ie)
a3d4e20a
JH		 453{
454 struct discovery_state *cache = &hdev->discovery;
455 struct list_head *pos = &cache->resolve;
456 struct inquiry_entry *p;
457
458 list_del(&ie->list);
459
460 list_for_each_entry(p, &cache->resolve, list) {
461 if (p->name_state != NAME_PENDING &&
a8c5fb1a 462 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 463 break;
464 pos = &p->list;
465 }
466
467 list_add(&ie->list, pos);
468}
469
3175405b 470bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 471 bool name_known, bool *ssp)
1da177e4 472{
30883512 473 struct discovery_state *cache = &hdev->discovery;
70f23020 474 struct inquiry_entry *ie;
1da177e4
LT		 475
476 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
477
388fc8fa
JH		 478 if (ssp)
479 *ssp = data->ssp_mode;
480
70f23020 481 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 482 if (ie) {
388fc8fa
JH		 483 if (ie->data.ssp_mode && ssp)
484 *ssp = true;
485
a3d4e20a 486 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 487 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 488 ie->data.rssi = data->rssi;
489 hci_inquiry_cache_update_resolve(hdev, ie);
490 }
491
561aafbc 492 goto update;
a3d4e20a 493 }
561aafbc
JH		 494
495 /* Entry not in the cache. Add new one. */
496 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
497 if (!ie)
3175405b 498 return false;
561aafbc
JH		 499
500 list_add(&ie->all, &cache->all);
501
502 if (name_known) {
503 ie->name_state = NAME_KNOWN;
504 } else {
505 ie->name_state = NAME_NOT_KNOWN;
506 list_add(&ie->list, &cache->unknown);
507 }
70f23020 508
561aafbc
JH		 509update:
510 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 511 ie->name_state != NAME_PENDING) {
561aafbc
JH		 512 ie->name_state = NAME_KNOWN;
513 list_del(&ie->list);
1da177e4
LT		 514 }
515
70f23020
AE		 516 memcpy(&ie->data, data, sizeof(*data));
517 ie->timestamp = jiffies;
1da177e4 518 cache->timestamp = jiffies;
3175405b
JH		 519
520 if (ie->name_state == NAME_NOT_KNOWN)
521 return false;
522
523 return true;
1da177e4
LT		 524}
525
526static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
527{
30883512 528 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 529 struct inquiry_info *info = (struct inquiry_info *) buf;
530 struct inquiry_entry *e;
531 int copied = 0;
532
561aafbc 533 list_for_each_entry(e, &cache->all, all) {
1da177e4 534 struct inquiry_data *data = &e->data;
b57c1a56
JH		 535
536 if (copied >= num)
537 break;
538
1da177e4
LT		 539 bacpy(&info->bdaddr, &data->bdaddr);
540 info->pscan_rep_mode = data->pscan_rep_mode;
541 info->pscan_period_mode = data->pscan_period_mode;
542 info->pscan_mode = data->pscan_mode;
543 memcpy(info->dev_class, data->dev_class, 3);
544 info->clock_offset = data->clock_offset;
b57c1a56 545
1da177e4 546 info++;
b57c1a56 547 copied++;
1da177e4
LT		 548 }
549
550 BT_DBG("cache %p, copied %d", cache, copied);
551 return copied;
552}
553
554static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
555{
556 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
557 struct hci_cp_inquiry cp;
558
559 BT_DBG("%s", hdev->name);
560
561 if (test_bit(HCI_INQUIRY, &hdev->flags))
562 return;
563
564 /* Start Inquiry */
565 memcpy(&cp.lap, &ir->lap, 3);
566 cp.length = ir->length;
567 cp.num_rsp = ir->num_rsp;
a9de9248 568 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 569}
570
571int hci_inquiry(void __user *arg)
572{
573 __u8 __user *ptr = arg;
574 struct hci_inquiry_req ir;
575 struct hci_dev *hdev;
576 int err = 0, do_inquiry = 0, max_rsp;
577 long timeo;
578 __u8 *buf;
579
580 if (copy_from_user(&ir, ptr, sizeof(ir)))
581 return -EFAULT;
582
5a08ecce
AE		 583 hdev = hci_dev_get(ir.dev_id);
584 if (!hdev)
1da177e4
LT		 585 return -ENODEV;
586
09fd0de5 587 hci_dev_lock(hdev);
8e87d142 588 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 589 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 590 inquiry_cache_flush(hdev);
591 do_inquiry = 1;
592 }
09fd0de5 593 hci_dev_unlock(hdev);
1da177e4 594
04837f64 595 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 596
597 if (do_inquiry) {
598 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
599 if (err < 0)
600 goto done;
601 }
1da177e4 602
8fc9ced3
GP		 603 /* for unlimited number of responses we will use buffer with
604 * 255 entries
605 */
1da177e4
LT		 606 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
607
608 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
609 * copy it to the user space.
610 */
01df8c31 611 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 612 if (!buf) {
1da177e4
LT		 613 err = -ENOMEM;
614 goto done;
615 }
616
09fd0de5 617 hci_dev_lock(hdev);
1da177e4 618 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 619 hci_dev_unlock(hdev);
1da177e4
LT		 620
621 BT_DBG("num_rsp %d", ir.num_rsp);
622
623 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
624 ptr += sizeof(ir);
625 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 626 ir.num_rsp))
1da177e4 627 err = -EFAULT;
8e87d142 628 } else
1da177e4
LT		 629 err = -EFAULT;
630
631 kfree(buf);
632
633done:
634 hci_dev_put(hdev);
635 return err;
636}
637
638/* ---- HCI ioctl helpers ---- */
639
640int hci_dev_open(__u16 dev)
641{
642 struct hci_dev *hdev;
643 int ret = 0;
644
5a08ecce
AE		 645 hdev = hci_dev_get(dev);
646 if (!hdev)
1da177e4
LT		 647 return -ENODEV;
648
649 BT_DBG("%s %p", hdev->name, hdev);
650
651 hci_req_lock(hdev);
652
94324962
JH		 653 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
654 ret = -ENODEV;
655 goto done;
656 }
657
611b30f7
MH		 658 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
659 ret = -ERFKILL;
660 goto done;
661 }
662
1da177e4
LT		 663 if (test_bit(HCI_UP, &hdev->flags)) {
664 ret = -EALREADY;
665 goto done;
666 }
667
668 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
669 set_bit(HCI_RAW, &hdev->flags);
670
07e3b94a
AE		 671 /* Treat all non BR/EDR controllers as raw devices if
672 enable_hs is not set */
673 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 674 set_bit(HCI_RAW, &hdev->flags);
675
1da177e4
LT		 676 if (hdev->open(hdev)) {
677 ret = -EIO;
678 goto done;
679 }
680
681 if (!test_bit(HCI_RAW, &hdev->flags)) {
682 atomic_set(&hdev->cmd_cnt, 1);
683 set_bit(HCI_INIT, &hdev->flags);
a5040efa 684 hdev->init_last_cmd = 0;
1da177e4 685
5f246e89 686 ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT);
1da177e4 687
eead27da 688 if (lmp_host_le_capable(hdev))
6ed58ec5 689 ret = __hci_request(hdev, hci_le_init_req, 0,
5f246e89 690 HCI_INIT_TIMEOUT);
6ed58ec5 691
1da177e4
LT		 692 clear_bit(HCI_INIT, &hdev->flags);
693 }
694
695 if (!ret) {
696 hci_dev_hold(hdev);
697 set_bit(HCI_UP, &hdev->flags);
698 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 699 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 700 hci_dev_lock(hdev);
744cf19e 701 mgmt_powered(hdev, 1);
09fd0de5 702 hci_dev_unlock(hdev);
56e5cb86 703 }
8e87d142 704 } else {
1da177e4 705 /* Init failed, cleanup */
3eff45ea 706 flush_work(&hdev->tx_work);
c347b765 707 flush_work(&hdev->cmd_work);
b78752cc 708 flush_work(&hdev->rx_work);
1da177e4
LT		 709
710 skb_queue_purge(&hdev->cmd_q);
711 skb_queue_purge(&hdev->rx_q);
712
713 if (hdev->flush)
714 hdev->flush(hdev);
715
716 if (hdev->sent_cmd) {
717 kfree_skb(hdev->sent_cmd);
718 hdev->sent_cmd = NULL;
719 }
720
721 hdev->close(hdev);
722 hdev->flags = 0;
723 }
724
725done:
726 hci_req_unlock(hdev);
727 hci_dev_put(hdev);
728 return ret;
729}
730
731static int hci_dev_do_close(struct hci_dev *hdev)
732{
733 BT_DBG("%s %p", hdev->name, hdev);
734
28b75a89
AG		 735 cancel_work_sync(&hdev->le_scan);
736
1da177e4
LT		 737 hci_req_cancel(hdev, ENODEV);
738 hci_req_lock(hdev);
739
740 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 741 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 742 hci_req_unlock(hdev);
743 return 0;
744 }
745
3eff45ea
GP		 746 /* Flush RX and TX works */
747 flush_work(&hdev->tx_work);
b78752cc 748 flush_work(&hdev->rx_work);
1da177e4 749
16ab91ab 750 if (hdev->discov_timeout > 0) {
e0f9309f 751 cancel_delayed_work(&hdev->discov_off);
16ab91ab 752 hdev->discov_timeout = 0;
5e5282bb 753 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 754 }
755
a8b2d5c2 756 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 757 cancel_delayed_work(&hdev->service_cache);
758
7ba8b4be
AG		 759 cancel_delayed_work_sync(&hdev->le_scan_disable);
760
09fd0de5 761 hci_dev_lock(hdev);
1da177e4
LT		 762 inquiry_cache_flush(hdev);
763 hci_conn_hash_flush(hdev);
09fd0de5 764 hci_dev_unlock(hdev);
1da177e4
LT		 765
766 hci_notify(hdev, HCI_DEV_DOWN);
767
768 if (hdev->flush)
769 hdev->flush(hdev);
770
771 /* Reset device */
772 skb_queue_purge(&hdev->cmd_q);
773 atomic_set(&hdev->cmd_cnt, 1);
8af59467 774 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 775 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 776 set_bit(HCI_INIT, &hdev->flags);
5f246e89 777 __hci_request(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 778 clear_bit(HCI_INIT, &hdev->flags);
779 }
780
c347b765
GP		 781 /* flush cmd work */
782 flush_work(&hdev->cmd_work);
1da177e4
LT		 783
784 /* Drop queues */
785 skb_queue_purge(&hdev->rx_q);
786 skb_queue_purge(&hdev->cmd_q);
787 skb_queue_purge(&hdev->raw_q);
788
789 /* Drop last sent command */
790 if (hdev->sent_cmd) {
b79f44c1 791 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 792 kfree_skb(hdev->sent_cmd);
793 hdev->sent_cmd = NULL;
794 }
795
796 /* After this point our queues are empty
797 * and no tasks are scheduled. */
798 hdev->close(hdev);
799
8ee56540
MH		 800 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
801 hci_dev_lock(hdev);
802 mgmt_powered(hdev, 0);
803 hci_dev_unlock(hdev);
804 }
5add6af8 805
1da177e4
LT		 806 /* Clear flags */
807 hdev->flags = 0;
808
e59fda8d 809 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 810 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 811
1da177e4
LT		 812 hci_req_unlock(hdev);
813
814 hci_dev_put(hdev);
815 return 0;
816}
817
818int hci_dev_close(__u16 dev)
819{
820 struct hci_dev *hdev;
821 int err;
822
70f23020
AE		 823 hdev = hci_dev_get(dev);
824 if (!hdev)
1da177e4 825 return -ENODEV;
8ee56540
MH		 826
827 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
828 cancel_delayed_work(&hdev->power_off);
829
1da177e4 830 err = hci_dev_do_close(hdev);
8ee56540 831
1da177e4
LT		 832 hci_dev_put(hdev);
833 return err;
834}
835
836int hci_dev_reset(__u16 dev)
837{
838 struct hci_dev *hdev;
839 int ret = 0;
840
70f23020
AE		 841 hdev = hci_dev_get(dev);
842 if (!hdev)
1da177e4
LT		 843 return -ENODEV;
844
845 hci_req_lock(hdev);
1da177e4
LT		 846
847 if (!test_bit(HCI_UP, &hdev->flags))
848 goto done;
849
850 /* Drop queues */
851 skb_queue_purge(&hdev->rx_q);
852 skb_queue_purge(&hdev->cmd_q);
853
09fd0de5 854 hci_dev_lock(hdev);
1da177e4
LT		 855 inquiry_cache_flush(hdev);
856 hci_conn_hash_flush(hdev);
09fd0de5 857 hci_dev_unlock(hdev);
1da177e4
LT		 858
859 if (hdev->flush)
860 hdev->flush(hdev);
861
8e87d142 862 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 863 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 864
865 if (!test_bit(HCI_RAW, &hdev->flags))
5f246e89 866 ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 867
868done:
1da177e4
LT		 869 hci_req_unlock(hdev);
870 hci_dev_put(hdev);
871 return ret;
872}
873
874int hci_dev_reset_stat(__u16 dev)
875{
876 struct hci_dev *hdev;
877 int ret = 0;
878
70f23020
AE		 879 hdev = hci_dev_get(dev);
880 if (!hdev)
1da177e4
LT		 881 return -ENODEV;
882
883 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
884
885 hci_dev_put(hdev);
886
887 return ret;
888}
889
890int hci_dev_cmd(unsigned int cmd, void __user *arg)
891{
892 struct hci_dev *hdev;
893 struct hci_dev_req dr;
894 int err = 0;
895
896 if (copy_from_user(&dr, arg, sizeof(dr)))
897 return -EFAULT;
898
70f23020
AE		 899 hdev = hci_dev_get(dr.dev_id);
900 if (!hdev)
1da177e4
LT		 901 return -ENODEV;
902
903 switch (cmd) {
904 case HCISETAUTH:
04837f64 905 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
5f246e89 906 HCI_INIT_TIMEOUT);
1da177e4
LT		 907 break;
908
909 case HCISETENCRYPT:
910 if (!lmp_encrypt_capable(hdev)) {
911 err = -EOPNOTSUPP;
912 break;
913 }
914
915 if (!test_bit(HCI_AUTH, &hdev->flags)) {
916 /* Auth must be enabled first */
04837f64 917 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
5f246e89 918 HCI_INIT_TIMEOUT);
1da177e4
LT		 919 if (err)
920 break;
921 }
922
04837f64 923 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
5f246e89 924 HCI_INIT_TIMEOUT);
1da177e4
LT		 925 break;
926
927 case HCISETSCAN:
04837f64 928 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
5f246e89 929 HCI_INIT_TIMEOUT);
1da177e4
LT		 930 break;
931
1da177e4 932 case HCISETLINKPOL:
e4e8e37c 933 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
5f246e89 934 HCI_INIT_TIMEOUT);
1da177e4
LT		 935 break;
936
937 case HCISETLINKMODE:
e4e8e37c
MH		 938 hdev->link_mode = ((__u16) dr.dev_opt) &
939 (HCI_LM_MASTER | HCI_LM_ACCEPT);
940 break;
941
942 case HCISETPTYPE:
943 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 944 break;
945
946 case HCISETACLMTU:
e4e8e37c
MH		 947 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
948 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 949 break;
950
951 case HCISETSCOMTU:
e4e8e37c
MH		 952 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
953 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 954 break;
955
956 default:
957 err = -EINVAL;
958 break;
959 }
e4e8e37c 960
1da177e4
LT		 961 hci_dev_put(hdev);
962 return err;
963}
964
965int hci_get_dev_list(void __user *arg)
966{
8035ded4 967 struct hci_dev *hdev;
1da177e4
LT		 968 struct hci_dev_list_req *dl;
969 struct hci_dev_req *dr;
1da177e4
LT		 970 int n = 0, size, err;
971 __u16 dev_num;
972
973 if (get_user(dev_num, (__u16 __user *) arg))
974 return -EFAULT;
975
976 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
977 return -EINVAL;
978
979 size = sizeof(*dl) + dev_num * sizeof(*dr);
980
70f23020
AE		 981 dl = kzalloc(size, GFP_KERNEL);
982 if (!dl)
1da177e4
LT		 983 return -ENOMEM;
984
985 dr = dl->dev_req;
986
f20d09d5 987 read_lock(&hci_dev_list_lock);
8035ded4 988 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 989 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 990 cancel_delayed_work(&hdev->power_off);
c542a06c 991
a8b2d5c2
JH		 992 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
993 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 994
1da177e4
LT		 995 (dr + n)->dev_id = hdev->id;
996 (dr + n)->dev_opt = hdev->flags;
c542a06c 997
1da177e4
LT		 998 if (++n >= dev_num)
999 break;
1000 }
f20d09d5 1001 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1002
1003 dl->dev_num = n;
1004 size = sizeof(*dl) + n * sizeof(*dr);
1005
1006 err = copy_to_user(arg, dl, size);
1007 kfree(dl);
1008
1009 return err ? -EFAULT : 0;
1010}
1011
1012int hci_get_dev_info(void __user *arg)
1013{
1014 struct hci_dev *hdev;
1015 struct hci_dev_info di;
1016 int err = 0;
1017
1018 if (copy_from_user(&di, arg, sizeof(di)))
1019 return -EFAULT;
1020
70f23020
AE		 1021 hdev = hci_dev_get(di.dev_id);
1022 if (!hdev)
1da177e4
LT		 1023 return -ENODEV;
1024
a8b2d5c2 1025 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1026 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1027
a8b2d5c2
JH		 1028 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1029 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1030
1da177e4
LT		 1031 strcpy(di.name, hdev->name);
1032 di.bdaddr = hdev->bdaddr;
943da25d 1033 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1034 di.flags = hdev->flags;
1035 di.pkt_type = hdev->pkt_type;
1036 di.acl_mtu = hdev->acl_mtu;
1037 di.acl_pkts = hdev->acl_pkts;
1038 di.sco_mtu = hdev->sco_mtu;
1039 di.sco_pkts = hdev->sco_pkts;
1040 di.link_policy = hdev->link_policy;
1041 di.link_mode = hdev->link_mode;
1042
1043 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1044 memcpy(&di.features, &hdev->features, sizeof(di.features));
1045
1046 if (copy_to_user(arg, &di, sizeof(di)))
1047 err = -EFAULT;
1048
1049 hci_dev_put(hdev);
1050
1051 return err;
1052}
1053
1054/* ---- Interface to HCI drivers ---- */
1055
611b30f7
MH		 1056static int hci_rfkill_set_block(void *data, bool blocked)
1057{
1058 struct hci_dev *hdev = data;
1059
1060 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1061
1062 if (!blocked)
1063 return 0;
1064
1065 hci_dev_do_close(hdev);
1066
1067 return 0;
1068}
1069
1070static const struct rfkill_ops hci_rfkill_ops = {
1071 .set_block = hci_rfkill_set_block,
1072};
1073
ab81cbf9
JH		 1074static void hci_power_on(struct work_struct *work)
1075{
1076 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1077
1078 BT_DBG("%s", hdev->name);
1079
1080 if (hci_dev_open(hdev->id) < 0)
1081 return;
1082
a8b2d5c2 1083 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
9345d40c 1084 schedule_delayed_work(&hdev->power_off, HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1085
a8b2d5c2 1086 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1087 mgmt_index_added(hdev);
ab81cbf9
JH		 1088}
1089
1090static void hci_power_off(struct work_struct *work)
1091{
3243553f 1092 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1093 power_off.work);
ab81cbf9
JH		 1094
1095 BT_DBG("%s", hdev->name);
1096
8ee56540 1097 hci_dev_do_close(hdev);
ab81cbf9
JH		 1098}
1099
16ab91ab
JH		 1100static void hci_discov_off(struct work_struct *work)
1101{
1102 struct hci_dev *hdev;
1103 u8 scan = SCAN_PAGE;
1104
1105 hdev = container_of(work, struct hci_dev, discov_off.work);
1106
1107 BT_DBG("%s", hdev->name);
1108
09fd0de5 1109 hci_dev_lock(hdev);
16ab91ab
JH		 1110
1111 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1112
1113 hdev->discov_timeout = 0;
1114
09fd0de5 1115 hci_dev_unlock(hdev);
16ab91ab
JH		 1116}
1117
2aeb9a1a
JH		 1118int hci_uuids_clear(struct hci_dev *hdev)
1119{
1120 struct list_head *p, *n;
1121
1122 list_for_each_safe(p, n, &hdev->uuids) {
1123 struct bt_uuid *uuid;
1124
1125 uuid = list_entry(p, struct bt_uuid, list);
1126
1127 list_del(p);
1128 kfree(uuid);
1129 }
1130
1131 return 0;
1132}
1133
55ed8ca1
JH		 1134int hci_link_keys_clear(struct hci_dev *hdev)
1135{
1136 struct list_head *p, *n;
1137
1138 list_for_each_safe(p, n, &hdev->link_keys) {
1139 struct link_key *key;
1140
1141 key = list_entry(p, struct link_key, list);
1142
1143 list_del(p);
1144 kfree(key);
1145 }
1146
1147 return 0;
1148}
1149
b899efaf
VCG		 1150int hci_smp_ltks_clear(struct hci_dev *hdev)
1151{
1152 struct smp_ltk *k, *tmp;
1153
1154 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1155 list_del(&k->list);
1156 kfree(k);
1157 }
1158
1159 return 0;
1160}
1161
55ed8ca1
JH		 1162struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1163{
8035ded4 1164 struct link_key *k;
55ed8ca1 1165
8035ded4 1166 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1167 if (bacmp(bdaddr, &k->bdaddr) == 0)
1168 return k;
55ed8ca1
JH		 1169
1170 return NULL;
1171}
1172
745c0ce3 1173static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1174 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1175{
1176 /* Legacy key */
1177 if (key_type < 0x03)
745c0ce3 1178 return true;
d25e28ab
JH		 1179
1180 /* Debug keys are insecure so don't store them persistently */
1181 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1182 return false;
d25e28ab
JH		 1183
1184 /* Changed combination key and there's no previous one */
1185 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1186 return false;
d25e28ab
JH		 1187
1188 /* Security mode 3 case */
1189 if (!conn)
745c0ce3 1190 return true;
d25e28ab
JH		 1191
1192 /* Neither local nor remote side had no-bonding as requirement */
1193 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1194 return true;
d25e28ab
JH		 1195
1196 /* Local side had dedicated bonding as requirement */
1197 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1198 return true;
d25e28ab
JH		 1199
1200 /* Remote side had dedicated bonding as requirement */
1201 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1202 return true;
d25e28ab
JH		 1203
1204 /* If none of the above criteria match, then don't store the key
1205 * persistently */
745c0ce3 1206 return false;
d25e28ab
JH		 1207}
1208
c9839a11 1209struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1210{
c9839a11 1211 struct smp_ltk *k;
75d262c2 1212
c9839a11
VCG		 1213 list_for_each_entry(k, &hdev->long_term_keys, list) {
1214 if (k->ediv != ediv ||
a8c5fb1a 1215 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1216 continue;
1217
c9839a11 1218 return k;
75d262c2
VCG		 1219 }
1220
1221 return NULL;
1222}
75d262c2 1223
c9839a11 1224struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1225 u8 addr_type)
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 (addr_type == k->bdaddr_type &&
a8c5fb1a 1231 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1232 return k;
1233
1234 return NULL;
1235}
75d262c2 1236
d25e28ab 1237int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1238 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1239{
1240 struct link_key *key, *old_key;
745c0ce3
VA		 1241 u8 old_key_type;
1242 bool persistent;
55ed8ca1
JH		 1243
1244 old_key = hci_find_link_key(hdev, bdaddr);
1245 if (old_key) {
1246 old_key_type = old_key->type;
1247 key = old_key;
1248 } else {
12adcf3a 1249 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1250 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1251 if (!key)
1252 return -ENOMEM;
1253 list_add(&key->list, &hdev->link_keys);
1254 }
1255
1256 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1257
d25e28ab
JH		 1258 /* Some buggy controller combinations generate a changed
1259 * combination key for legacy pairing even when there's no
1260 * previous key */
1261 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1262 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1263 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1264 if (conn)
1265 conn->key_type = type;
1266 }
d25e28ab 1267
55ed8ca1 1268 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1269 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1270 key->pin_len = pin_len;
1271
b6020ba0 1272 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1273 key->type = old_key_type;
4748fed2
JH		 1274 else
1275 key->type = type;
1276
4df378a1
JH		 1277 if (!new_key)
1278 return 0;
1279
1280 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1281
744cf19e 1282 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1283
6ec5bcad
VA		 1284 if (conn)
1285 conn->flush_key = !persistent;
55ed8ca1
JH		 1286
1287 return 0;
1288}
1289
c9839a11 1290int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1291 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1292 ediv, u8 rand[8])
75d262c2 1293{
c9839a11 1294 struct smp_ltk *key, *old_key;
75d262c2 1295
c9839a11
VCG		 1296 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1297 return 0;
75d262c2 1298
c9839a11
VCG		 1299 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1300 if (old_key)
75d262c2 1301 key = old_key;
c9839a11
VCG		 1302 else {
1303 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1304 if (!key)
1305 return -ENOMEM;
c9839a11 1306 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1307 }
1308
75d262c2 1309 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1310 key->bdaddr_type = addr_type;
1311 memcpy(key->val, tk, sizeof(key->val));
1312 key->authenticated = authenticated;
1313 key->ediv = ediv;
1314 key->enc_size = enc_size;
1315 key->type = type;
1316 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1317
c9839a11
VCG		 1318 if (!new_key)
1319 return 0;
75d262c2 1320
261cc5aa
VCG		 1321 if (type & HCI_SMP_LTK)
1322 mgmt_new_ltk(hdev, key, 1);
1323
75d262c2
VCG		 1324 return 0;
1325}
1326
55ed8ca1
JH		 1327int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1328{
1329 struct link_key *key;
1330
1331 key = hci_find_link_key(hdev, bdaddr);
1332 if (!key)
1333 return -ENOENT;
1334
1335 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1336
1337 list_del(&key->list);
1338 kfree(key);
1339
1340 return 0;
1341}
1342
b899efaf
VCG		 1343int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1344{
1345 struct smp_ltk *k, *tmp;
1346
1347 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1348 if (bacmp(bdaddr, &k->bdaddr))
1349 continue;
1350
1351 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1352
1353 list_del(&k->list);
1354 kfree(k);
1355 }
1356
1357 return 0;
1358}
1359
6bd32326 1360/* HCI command timer function */
bda4f23a 1361static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1362{
1363 struct hci_dev *hdev = (void *) arg;
1364
bda4f23a
AE		 1365 if (hdev->sent_cmd) {
1366 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1367 u16 opcode = __le16_to_cpu(sent->opcode);
1368
1369 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1370 } else {
1371 BT_ERR("%s command tx timeout", hdev->name);
1372 }
1373
6bd32326 1374 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1375 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1376}
1377
2763eda6 1378struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1379 bdaddr_t *bdaddr)
2763eda6
SJ		 1380{
1381 struct oob_data *data;
1382
1383 list_for_each_entry(data, &hdev->remote_oob_data, list)
1384 if (bacmp(bdaddr, &data->bdaddr) == 0)
1385 return data;
1386
1387 return NULL;
1388}
1389
1390int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1391{
1392 struct oob_data *data;
1393
1394 data = hci_find_remote_oob_data(hdev, bdaddr);
1395 if (!data)
1396 return -ENOENT;
1397
1398 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1399
1400 list_del(&data->list);
1401 kfree(data);
1402
1403 return 0;
1404}
1405
1406int hci_remote_oob_data_clear(struct hci_dev *hdev)
1407{
1408 struct oob_data *data, *n;
1409
1410 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1411 list_del(&data->list);
1412 kfree(data);
1413 }
1414
1415 return 0;
1416}
1417
1418int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1419 u8 *randomizer)
2763eda6
SJ		 1420{
1421 struct oob_data *data;
1422
1423 data = hci_find_remote_oob_data(hdev, bdaddr);
1424
1425 if (!data) {
1426 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1427 if (!data)
1428 return -ENOMEM;
1429
1430 bacpy(&data->bdaddr, bdaddr);
1431 list_add(&data->list, &hdev->remote_oob_data);
1432 }
1433
1434 memcpy(data->hash, hash, sizeof(data->hash));
1435 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1436
1437 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1438
1439 return 0;
1440}
1441
04124681 1442struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1443{
8035ded4 1444 struct bdaddr_list *b;
b2a66aad 1445
8035ded4 1446 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1447 if (bacmp(bdaddr, &b->bdaddr) == 0)
1448 return b;
b2a66aad
AJ		 1449
1450 return NULL;
1451}
1452
1453int hci_blacklist_clear(struct hci_dev *hdev)
1454{
1455 struct list_head *p, *n;
1456
1457 list_for_each_safe(p, n, &hdev->blacklist) {
1458 struct bdaddr_list *b;
1459
1460 b = list_entry(p, struct bdaddr_list, list);
1461
1462 list_del(p);
1463 kfree(b);
1464 }
1465
1466 return 0;
1467}
1468
88c1fe4b 1469int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1470{
1471 struct bdaddr_list *entry;
b2a66aad
AJ		 1472
1473 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1474 return -EBADF;
1475
5e762444
AJ		 1476 if (hci_blacklist_lookup(hdev, bdaddr))
1477 return -EEXIST;
b2a66aad
AJ		 1478
1479 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1480 if (!entry)
1481 return -ENOMEM;
b2a66aad
AJ		 1482
1483 bacpy(&entry->bdaddr, bdaddr);
1484
1485 list_add(&entry->list, &hdev->blacklist);
1486
88c1fe4b 1487 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1488}
1489
88c1fe4b 1490int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1491{
1492 struct bdaddr_list *entry;
b2a66aad 1493
1ec918ce 1494 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1495 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1496
1497 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1498 if (!entry)
5e762444 1499 return -ENOENT;
b2a66aad
AJ		 1500
1501 list_del(&entry->list);
1502 kfree(entry);
1503
88c1fe4b 1504 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1505}
1506
7ba8b4be
AG		 1507static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1508{
1509 struct le_scan_params *param = (struct le_scan_params *) opt;
1510 struct hci_cp_le_set_scan_param cp;
1511
1512 memset(&cp, 0, sizeof(cp));
1513 cp.type = param->type;
1514 cp.interval = cpu_to_le16(param->interval);
1515 cp.window = cpu_to_le16(param->window);
1516
1517 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1518}
1519
1520static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1521{
1522 struct hci_cp_le_set_scan_enable cp;
1523
1524 memset(&cp, 0, sizeof(cp));
1525 cp.enable = 1;
0431a43c 1526 cp.filter_dup = 1;
7ba8b4be
AG		 1527
1528 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1529}
1530
1531static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1532 u16 window, int timeout)
7ba8b4be
AG		 1533{
1534 long timeo = msecs_to_jiffies(3000);
1535 struct le_scan_params param;
1536 int err;
1537
1538 BT_DBG("%s", hdev->name);
1539
1540 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1541 return -EINPROGRESS;
1542
1543 param.type = type;
1544 param.interval = interval;
1545 param.window = window;
1546
1547 hci_req_lock(hdev);
1548
1549 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1550 timeo);
7ba8b4be
AG		 1551 if (!err)
1552 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1553
1554 hci_req_unlock(hdev);
1555
1556 if (err < 0)
1557 return err;
1558
1559 schedule_delayed_work(&hdev->le_scan_disable,
04124681 1560 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1561
1562 return 0;
1563}
1564
7dbfac1d
AG		 1565int hci_cancel_le_scan(struct hci_dev *hdev)
1566{
1567 BT_DBG("%s", hdev->name);
1568
1569 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1570 return -EALREADY;
1571
1572 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1573 struct hci_cp_le_set_scan_enable cp;
1574
1575 /* Send HCI command to disable LE Scan */
1576 memset(&cp, 0, sizeof(cp));
1577 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1578 }
1579
1580 return 0;
1581}
1582
7ba8b4be
AG		 1583static void le_scan_disable_work(struct work_struct *work)
1584{
1585 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1586 le_scan_disable.work);
7ba8b4be
AG		 1587 struct hci_cp_le_set_scan_enable cp;
1588
1589 BT_DBG("%s", hdev->name);
1590
1591 memset(&cp, 0, sizeof(cp));
1592
1593 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1594}
1595
28b75a89
AG		 1596static void le_scan_work(struct work_struct *work)
1597{
1598 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1599 struct le_scan_params *param = &hdev->le_scan_params;
1600
1601 BT_DBG("%s", hdev->name);
1602
04124681
GP		 1603 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1604 param->timeout);
28b75a89
AG		 1605}
1606
1607int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1608 int timeout)
28b75a89
AG		 1609{
1610 struct le_scan_params *param = &hdev->le_scan_params;
1611
1612 BT_DBG("%s", hdev->name);
1613
1614 if (work_busy(&hdev->le_scan))
1615 return -EINPROGRESS;
1616
1617 param->type = type;
1618 param->interval = interval;
1619 param->window = window;
1620 param->timeout = timeout;
1621
1622 queue_work(system_long_wq, &hdev->le_scan);
1623
1624 return 0;
1625}
1626
9be0dab7
DH		 1627/* Alloc HCI device */
1628struct hci_dev *hci_alloc_dev(void)
1629{
1630 struct hci_dev *hdev;
1631
1632 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1633 if (!hdev)
1634 return NULL;
1635
b1b813d4
DH		 1636 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1637 hdev->esco_type = (ESCO_HV1);
1638 hdev->link_mode = (HCI_LM_ACCEPT);
1639 hdev->io_capability = 0x03; /* No Input No Output */
1640
b1b813d4
DH		 1641 hdev->sniff_max_interval = 800;
1642 hdev->sniff_min_interval = 80;
1643
1644 mutex_init(&hdev->lock);
1645 mutex_init(&hdev->req_lock);
1646
1647 INIT_LIST_HEAD(&hdev->mgmt_pending);
1648 INIT_LIST_HEAD(&hdev->blacklist);
1649 INIT_LIST_HEAD(&hdev->uuids);
1650 INIT_LIST_HEAD(&hdev->link_keys);
1651 INIT_LIST_HEAD(&hdev->long_term_keys);
1652 INIT_LIST_HEAD(&hdev->remote_oob_data);
b1b813d4
DH		 1653
1654 INIT_WORK(&hdev->rx_work, hci_rx_work);
1655 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1656 INIT_WORK(&hdev->tx_work, hci_tx_work);
1657 INIT_WORK(&hdev->power_on, hci_power_on);
1658 INIT_WORK(&hdev->le_scan, le_scan_work);
1659
b1b813d4
DH		 1660 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1661 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1662 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1663
9be0dab7 1664 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 1665 skb_queue_head_init(&hdev->rx_q);
1666 skb_queue_head_init(&hdev->cmd_q);
1667 skb_queue_head_init(&hdev->raw_q);
1668
1669 init_waitqueue_head(&hdev->req_wait_q);
1670
bda4f23a 1671 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 1672
b1b813d4
DH		 1673 hci_init_sysfs(hdev);
1674 discovery_init(hdev);
1675 hci_conn_hash_init(hdev);
9be0dab7
DH		 1676
1677 return hdev;
1678}
1679EXPORT_SYMBOL(hci_alloc_dev);
1680
1681/* Free HCI device */
1682void hci_free_dev(struct hci_dev *hdev)
1683{
1684 skb_queue_purge(&hdev->driver_init);
1685
1686 /* will free via device release */
1687 put_device(&hdev->dev);
1688}
1689EXPORT_SYMBOL(hci_free_dev);
1690
1da177e4
LT		 1691/* Register HCI device */
1692int hci_register_dev(struct hci_dev *hdev)
1693{
b1b813d4 1694 int id, error;
1da177e4 1695
010666a1 1696 if (!hdev->open || !hdev->close)
1da177e4
LT		 1697 return -EINVAL;
1698
08add513
MM		 1699 /* Do not allow HCI_AMP devices to register at index 0,
1700 * so the index can be used as the AMP controller ID.
1701 */
3df92b31
SL		 1702 switch (hdev->dev_type) {
1703 case HCI_BREDR:
1704 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
1705 break;
1706 case HCI_AMP:
1707 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
1708 break;
1709 default:
1710 return -EINVAL;
1da177e4 1711 }
8e87d142 1712
3df92b31
SL		 1713 if (id < 0)
1714 return id;
1715
1da177e4
LT		 1716 sprintf(hdev->name, "hci%d", id);
1717 hdev->id = id;
2d8b3a11
AE		 1718
1719 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1720
3df92b31
SL		 1721 write_lock(&hci_dev_list_lock);
1722 list_add(&hdev->list, &hci_dev_list);
f20d09d5 1723 write_unlock(&hci_dev_list_lock);
1da177e4 1724
32845eb1 1725 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 1726 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1727 if (!hdev->workqueue) {
1728 error = -ENOMEM;
1729 goto err;
1730 }
f48fd9c8 1731
33ca954d
DH		 1732 error = hci_add_sysfs(hdev);
1733 if (error < 0)
1734 goto err_wqueue;
1da177e4 1735
611b30f7 1736 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 1737 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1738 hdev);
611b30f7
MH		 1739 if (hdev->rfkill) {
1740 if (rfkill_register(hdev->rfkill) < 0) {
1741 rfkill_destroy(hdev->rfkill);
1742 hdev->rfkill = NULL;
1743 }
1744 }
1745
a8b2d5c2
JH		 1746 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1747 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1748 schedule_work(&hdev->power_on);
ab81cbf9 1749
1da177e4 1750 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1751 hci_dev_hold(hdev);
1da177e4
LT		 1752
1753 return id;
f48fd9c8 1754
33ca954d
DH		 1755err_wqueue:
1756 destroy_workqueue(hdev->workqueue);
1757err:
3df92b31 1758 ida_simple_remove(&hci_index_ida, hdev->id);
f20d09d5 1759 write_lock(&hci_dev_list_lock);
f48fd9c8 1760 list_del(&hdev->list);
f20d09d5 1761 write_unlock(&hci_dev_list_lock);
f48fd9c8 1762
33ca954d 1763 return error;
1da177e4
LT		 1764}
1765EXPORT_SYMBOL(hci_register_dev);
1766
1767/* Unregister HCI device */
59735631 1768void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1769{
3df92b31 1770 int i, id;
ef222013 1771
c13854ce 1772 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1773
94324962
JH		 1774 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1775
3df92b31
SL		 1776 id = hdev->id;
1777
f20d09d5 1778 write_lock(&hci_dev_list_lock);
1da177e4 1779 list_del(&hdev->list);
f20d09d5 1780 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1781
1782 hci_dev_do_close(hdev);
1783
cd4c5391 1784 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1785 kfree_skb(hdev->reassembly[i]);
1786
ab81cbf9 1787 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 1788 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1789 hci_dev_lock(hdev);
744cf19e 1790 mgmt_index_removed(hdev);
09fd0de5 1791 hci_dev_unlock(hdev);
56e5cb86 1792 }
ab81cbf9 1793
2e58ef3e
JH		 1794 /* mgmt_index_removed should take care of emptying the
1795 * pending list */
1796 BUG_ON(!list_empty(&hdev->mgmt_pending));
1797
1da177e4
LT		 1798 hci_notify(hdev, HCI_DEV_UNREG);
1799
611b30f7
MH		 1800 if (hdev->rfkill) {
1801 rfkill_unregister(hdev->rfkill);
1802 rfkill_destroy(hdev->rfkill);
1803 }
1804
ce242970 1805 hci_del_sysfs(hdev);
147e2d59 1806
f48fd9c8
MH		 1807 destroy_workqueue(hdev->workqueue);
1808
09fd0de5 1809 hci_dev_lock(hdev);
e2e0cacb 1810 hci_blacklist_clear(hdev);
2aeb9a1a 1811 hci_uuids_clear(hdev);
55ed8ca1 1812 hci_link_keys_clear(hdev);
b899efaf 1813 hci_smp_ltks_clear(hdev);
2763eda6 1814 hci_remote_oob_data_clear(hdev);
09fd0de5 1815 hci_dev_unlock(hdev);
e2e0cacb 1816
dc946bd8 1817 hci_dev_put(hdev);
3df92b31
SL		 1818
1819 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 1820}
1821EXPORT_SYMBOL(hci_unregister_dev);
1822
1823/* Suspend HCI device */
1824int hci_suspend_dev(struct hci_dev *hdev)
1825{
1826 hci_notify(hdev, HCI_DEV_SUSPEND);
1827 return 0;
1828}
1829EXPORT_SYMBOL(hci_suspend_dev);
1830
1831/* Resume HCI device */
1832int hci_resume_dev(struct hci_dev *hdev)
1833{
1834 hci_notify(hdev, HCI_DEV_RESUME);
1835 return 0;
1836}
1837EXPORT_SYMBOL(hci_resume_dev);
1838
76bca880
MH		 1839/* Receive frame from HCI drivers */
1840int hci_recv_frame(struct sk_buff *skb)
1841{
1842 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1843 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 1844 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 1845 kfree_skb(skb);
1846 return -ENXIO;
1847 }
1848
1849 /* Incomming skb */
1850 bt_cb(skb)->incoming = 1;
1851
1852 /* Time stamp */
1853 __net_timestamp(skb);
1854
76bca880 1855 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1856 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1857
76bca880
MH		 1858 return 0;
1859}
1860EXPORT_SYMBOL(hci_recv_frame);
1861
33e882a5 1862static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 1863 int count, __u8 index)
33e882a5
SS		 1864{
1865 int len = 0;
1866 int hlen = 0;
1867 int remain = count;
1868 struct sk_buff *skb;
1869 struct bt_skb_cb *scb;
1870
1871 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 1872 index >= NUM_REASSEMBLY)
33e882a5
SS		 1873 return -EILSEQ;
1874
1875 skb = hdev->reassembly[index];
1876
1877 if (!skb) {
1878 switch (type) {
1879 case HCI_ACLDATA_PKT:
1880 len = HCI_MAX_FRAME_SIZE;
1881 hlen = HCI_ACL_HDR_SIZE;
1882 break;
1883 case HCI_EVENT_PKT:
1884 len = HCI_MAX_EVENT_SIZE;
1885 hlen = HCI_EVENT_HDR_SIZE;
1886 break;
1887 case HCI_SCODATA_PKT:
1888 len = HCI_MAX_SCO_SIZE;
1889 hlen = HCI_SCO_HDR_SIZE;
1890 break;
1891 }
1892
1e429f38 1893 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1894 if (!skb)
1895 return -ENOMEM;
1896
1897 scb = (void *) skb->cb;
1898 scb->expect = hlen;
1899 scb->pkt_type = type;
1900
1901 skb->dev = (void *) hdev;
1902 hdev->reassembly[index] = skb;
1903 }
1904
1905 while (count) {
1906 scb = (void *) skb->cb;
89bb46d0 1907 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1908
1909 memcpy(skb_put(skb, len), data, len);
1910
1911 count -= len;
1912 data += len;
1913 scb->expect -= len;
1914 remain = count;
1915
1916 switch (type) {
1917 case HCI_EVENT_PKT:
1918 if (skb->len == HCI_EVENT_HDR_SIZE) {
1919 struct hci_event_hdr *h = hci_event_hdr(skb);
1920 scb->expect = h->plen;
1921
1922 if (skb_tailroom(skb) < scb->expect) {
1923 kfree_skb(skb);
1924 hdev->reassembly[index] = NULL;
1925 return -ENOMEM;
1926 }
1927 }
1928 break;
1929
1930 case HCI_ACLDATA_PKT:
1931 if (skb->len == HCI_ACL_HDR_SIZE) {
1932 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1933 scb->expect = __le16_to_cpu(h->dlen);
1934
1935 if (skb_tailroom(skb) < scb->expect) {
1936 kfree_skb(skb);
1937 hdev->reassembly[index] = NULL;
1938 return -ENOMEM;
1939 }
1940 }
1941 break;
1942
1943 case HCI_SCODATA_PKT:
1944 if (skb->len == HCI_SCO_HDR_SIZE) {
1945 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1946 scb->expect = h->dlen;
1947
1948 if (skb_tailroom(skb) < scb->expect) {
1949 kfree_skb(skb);
1950 hdev->reassembly[index] = NULL;
1951 return -ENOMEM;
1952 }
1953 }
1954 break;
1955 }
1956
1957 if (scb->expect == 0) {
1958 /* Complete frame */
1959
1960 bt_cb(skb)->pkt_type = type;
1961 hci_recv_frame(skb);
1962
1963 hdev->reassembly[index] = NULL;
1964 return remain;
1965 }
1966 }
1967
1968 return remain;
1969}
1970
ef222013
MH		 1971int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1972{
f39a3c06
SS		 1973 int rem = 0;
1974
ef222013
MH		 1975 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1976 return -EILSEQ;
1977
da5f6c37 1978 while (count) {
1e429f38 1979 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 1980 if (rem < 0)
1981 return rem;
ef222013 1982
f39a3c06
SS		 1983 data += (count - rem);
1984 count = rem;
f81c6224 1985 }
ef222013 1986
f39a3c06 1987 return rem;
ef222013
MH		 1988}
1989EXPORT_SYMBOL(hci_recv_fragment);
1990
99811510
SS		 1991#define STREAM_REASSEMBLY 0
1992
1993int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
1994{
1995 int type;
1996 int rem = 0;
1997
da5f6c37 1998 while (count) {
99811510
SS		 1999 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2000
2001 if (!skb) {
2002 struct { char type; } *pkt;
2003
2004 /* Start of the frame */
2005 pkt = data;
2006 type = pkt->type;
2007
2008 data++;
2009 count--;
2010 } else
2011 type = bt_cb(skb)->pkt_type;
2012
1e429f38 2013 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2014 STREAM_REASSEMBLY);
99811510
SS		 2015 if (rem < 0)
2016 return rem;
2017
2018 data += (count - rem);
2019 count = rem;
f81c6224 2020 }
99811510
SS		 2021
2022 return rem;
2023}
2024EXPORT_SYMBOL(hci_recv_stream_fragment);
2025
1da177e4
LT		 2026/* ---- Interface to upper protocols ---- */
2027
1da177e4
LT		 2028int hci_register_cb(struct hci_cb *cb)
2029{
2030 BT_DBG("%p name %s", cb, cb->name);
2031
f20d09d5 2032 write_lock(&hci_cb_list_lock);
1da177e4 2033 list_add(&cb->list, &hci_cb_list);
f20d09d5 2034 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2035
2036 return 0;
2037}
2038EXPORT_SYMBOL(hci_register_cb);
2039
2040int hci_unregister_cb(struct hci_cb *cb)
2041{
2042 BT_DBG("%p name %s", cb, cb->name);
2043
f20d09d5 2044 write_lock(&hci_cb_list_lock);
1da177e4 2045 list_del(&cb->list);
f20d09d5 2046 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2047
2048 return 0;
2049}
2050EXPORT_SYMBOL(hci_unregister_cb);
2051
2052static int hci_send_frame(struct sk_buff *skb)
2053{
2054 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2055
2056 if (!hdev) {
2057 kfree_skb(skb);
2058 return -ENODEV;
2059 }
2060
0d48d939 2061 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2062
cd82e61c
MH		 2063 /* Time stamp */
2064 __net_timestamp(skb);
1da177e4 2065
cd82e61c
MH		 2066 /* Send copy to monitor */
2067 hci_send_to_monitor(hdev, skb);
2068
2069 if (atomic_read(&hdev->promisc)) {
2070 /* Send copy to the sockets */
470fe1b5 2071 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2072 }
2073
2074 /* Get rid of skb owner, prior to sending to the driver. */
2075 skb_orphan(skb);
2076
2077 return hdev->send(skb);
2078}
2079
2080/* Send HCI command */
a9de9248 2081int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2082{
2083 int len = HCI_COMMAND_HDR_SIZE + plen;
2084 struct hci_command_hdr *hdr;
2085 struct sk_buff *skb;
2086
f0e09510 2087 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2088
2089 skb = bt_skb_alloc(len, GFP_ATOMIC);
2090 if (!skb) {
ef222013 2091 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2092 return -ENOMEM;
2093 }
2094
2095 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2096 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2097 hdr->plen = plen;
2098
2099 if (plen)
2100 memcpy(skb_put(skb, plen), param, plen);
2101
2102 BT_DBG("skb len %d", skb->len);
2103
0d48d939 2104 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2105 skb->dev = (void *) hdev;
c78ae283 2106
a5040efa
JH		 2107 if (test_bit(HCI_INIT, &hdev->flags))
2108 hdev->init_last_cmd = opcode;
2109
1da177e4 2110 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2111 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2112
2113 return 0;
2114}
1da177e4
LT		 2115
2116/* Get data from the previously sent command */
a9de9248 2117void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2118{
2119 struct hci_command_hdr *hdr;
2120
2121 if (!hdev->sent_cmd)
2122 return NULL;
2123
2124 hdr = (void *) hdev->sent_cmd->data;
2125
a9de9248 2126 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2127 return NULL;
2128
f0e09510 2129 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2130
2131 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2132}
2133
2134/* Send ACL data */
2135static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2136{
2137 struct hci_acl_hdr *hdr;
2138 int len = skb->len;
2139
badff6d0
ACM		 2140 skb_push(skb, HCI_ACL_HDR_SIZE);
2141 skb_reset_transport_header(skb);
9c70220b 2142 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2143 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2144 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2145}
2146
73d80deb 2147static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
a8c5fb1a 2148 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2149{
2150 struct hci_dev *hdev = conn->hdev;
2151 struct sk_buff *list;
2152
087bfd99
GP		 2153 skb->len = skb_headlen(skb);
2154 skb->data_len = 0;
2155
2156 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2157 hci_add_acl_hdr(skb, conn->handle, flags);
2158
70f23020
AE		 2159 list = skb_shinfo(skb)->frag_list;
2160 if (!list) {
1da177e4
LT		 2161 /* Non fragmented */
2162 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2163
73d80deb 2164 skb_queue_tail(queue, skb);
1da177e4
LT		 2165 } else {
2166 /* Fragmented */
2167 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2168
2169 skb_shinfo(skb)->frag_list = NULL;
2170
2171 /* Queue all fragments atomically */
af3e6359 2172 spin_lock(&queue->lock);
1da177e4 2173
73d80deb 2174 __skb_queue_tail(queue, skb);
e702112f
AE		 2175
2176 flags &= ~ACL_START;
2177 flags |= ACL_CONT;
1da177e4
LT		 2178 do {
2179 skb = list; list = list->next;
8e87d142 2180
1da177e4 2181 skb->dev = (void *) hdev;
0d48d939 2182 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2183 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2184
2185 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2186
73d80deb 2187 __skb_queue_tail(queue, skb);
1da177e4
LT		 2188 } while (list);
2189
af3e6359 2190 spin_unlock(&queue->lock);
1da177e4 2191 }
73d80deb
LAD		 2192}
2193
2194void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2195{
2196 struct hci_conn *conn = chan->conn;
2197 struct hci_dev *hdev = conn->hdev;
2198
f0e09510 2199 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2200
2201 skb->dev = (void *) hdev;
73d80deb
LAD		 2202
2203 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2204
3eff45ea 2205 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2206}
1da177e4
LT		 2207
2208/* Send SCO data */
0d861d8b 2209void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2210{
2211 struct hci_dev *hdev = conn->hdev;
2212 struct hci_sco_hdr hdr;
2213
2214 BT_DBG("%s len %d", hdev->name, skb->len);
2215
aca3192c 2216 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2217 hdr.dlen = skb->len;
2218
badff6d0
ACM		 2219 skb_push(skb, HCI_SCO_HDR_SIZE);
2220 skb_reset_transport_header(skb);
9c70220b 2221 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2222
2223 skb->dev = (void *) hdev;
0d48d939 2224 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2225
1da177e4 2226 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2227 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2228}
1da177e4
LT		 2229
2230/* ---- HCI TX task (outgoing data) ---- */
2231
2232/* HCI Connection scheduler */
6039aa73
GP		 2233static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2234 int *quote)
1da177e4
LT		 2235{
2236 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2237 struct hci_conn *conn = NULL, *c;
abc5de8f 2238 unsigned int num = 0, min = ~0;
1da177e4 2239
8e87d142 2240 /* We don't have to lock device here. Connections are always
1da177e4 2241 * added and removed with TX task disabled. */
bf4c6325
GP		 2242
2243 rcu_read_lock();
2244
2245 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2246 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2247 continue;
769be974
MH		 2248
2249 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2250 continue;
2251
1da177e4
LT		 2252 num++;
2253
2254 if (c->sent < min) {
2255 min = c->sent;
2256 conn = c;
2257 }
52087a79
LAD		 2258
2259 if (hci_conn_num(hdev, type) == num)
2260 break;
1da177e4
LT		 2261 }
2262
bf4c6325
GP		 2263 rcu_read_unlock();
2264
1da177e4 2265 if (conn) {
6ed58ec5
VT		 2266 int cnt, q;
2267
2268 switch (conn->type) {
2269 case ACL_LINK:
2270 cnt = hdev->acl_cnt;
2271 break;
2272 case SCO_LINK:
2273 case ESCO_LINK:
2274 cnt = hdev->sco_cnt;
2275 break;
2276 case LE_LINK:
2277 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2278 break;
2279 default:
2280 cnt = 0;
2281 BT_ERR("Unknown link type");
2282 }
2283
2284 q = cnt / num;
1da177e4
LT		 2285 *quote = q ? q : 1;
2286 } else
2287 *quote = 0;
2288
2289 BT_DBG("conn %p quote %d", conn, *quote);
2290 return conn;
2291}
2292
6039aa73 2293static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2294{
2295 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2296 struct hci_conn *c;
1da177e4 2297
bae1f5d9 2298 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2299
bf4c6325
GP		 2300 rcu_read_lock();
2301
1da177e4 2302 /* Kill stalled connections */
bf4c6325 2303 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2304 if (c->type == type && c->sent) {
2305 BT_ERR("%s killing stalled connection %s",
a8c5fb1a 2306 hdev->name, batostr(&c->dst));
7490c6c2 2307 hci_acl_disconn(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2308 }
2309 }
bf4c6325
GP		 2310
2311 rcu_read_unlock();
1da177e4
LT		 2312}
2313
6039aa73
GP		 2314static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2315 int *quote)
1da177e4 2316{
73d80deb
LAD		 2317 struct hci_conn_hash *h = &hdev->conn_hash;
2318 struct hci_chan *chan = NULL;
abc5de8f 2319 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2320 struct hci_conn *conn;
73d80deb
LAD		 2321 int cnt, q, conn_num = 0;
2322
2323 BT_DBG("%s", hdev->name);
2324
bf4c6325
GP		 2325 rcu_read_lock();
2326
2327 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2328 struct hci_chan *tmp;
2329
2330 if (conn->type != type)
2331 continue;
2332
2333 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2334 continue;
2335
2336 conn_num++;
2337
8192edef 2338 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2339 struct sk_buff *skb;
2340
2341 if (skb_queue_empty(&tmp->data_q))
2342 continue;
2343
2344 skb = skb_peek(&tmp->data_q);
2345 if (skb->priority < cur_prio)
2346 continue;
2347
2348 if (skb->priority > cur_prio) {
2349 num = 0;
2350 min = ~0;
2351 cur_prio = skb->priority;
2352 }
2353
2354 num++;
2355
2356 if (conn->sent < min) {
2357 min = conn->sent;
2358 chan = tmp;
2359 }
2360 }
2361
2362 if (hci_conn_num(hdev, type) == conn_num)
2363 break;
2364 }
2365
bf4c6325
GP		 2366 rcu_read_unlock();
2367
73d80deb
LAD		 2368 if (!chan)
2369 return NULL;
2370
2371 switch (chan->conn->type) {
2372 case ACL_LINK:
2373 cnt = hdev->acl_cnt;
2374 break;
2375 case SCO_LINK:
2376 case ESCO_LINK:
2377 cnt = hdev->sco_cnt;
2378 break;
2379 case LE_LINK:
2380 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2381 break;
2382 default:
2383 cnt = 0;
2384 BT_ERR("Unknown link type");
2385 }
2386
2387 q = cnt / num;
2388 *quote = q ? q : 1;
2389 BT_DBG("chan %p quote %d", chan, *quote);
2390 return chan;
2391}
2392
02b20f0b
LAD		 2393static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2394{
2395 struct hci_conn_hash *h = &hdev->conn_hash;
2396 struct hci_conn *conn;
2397 int num = 0;
2398
2399 BT_DBG("%s", hdev->name);
2400
bf4c6325
GP		 2401 rcu_read_lock();
2402
2403 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2404 struct hci_chan *chan;
2405
2406 if (conn->type != type)
2407 continue;
2408
2409 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2410 continue;
2411
2412 num++;
2413
8192edef 2414 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2415 struct sk_buff *skb;
2416
2417 if (chan->sent) {
2418 chan->sent = 0;
2419 continue;
2420 }
2421
2422 if (skb_queue_empty(&chan->data_q))
2423 continue;
2424
2425 skb = skb_peek(&chan->data_q);
2426 if (skb->priority >= HCI_PRIO_MAX - 1)
2427 continue;
2428
2429 skb->priority = HCI_PRIO_MAX - 1;
2430
2431 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2432 skb->priority);
02b20f0b
LAD		 2433 }
2434
2435 if (hci_conn_num(hdev, type) == num)
2436 break;
2437 }
bf4c6325
GP		 2438
2439 rcu_read_unlock();
2440
02b20f0b
LAD		 2441}
2442
b71d385a
AE		 2443static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2444{
2445 /* Calculate count of blocks used by this packet */
2446 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2447}
2448
6039aa73 2449static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2450{
1da177e4
LT		 2451 if (!test_bit(HCI_RAW, &hdev->flags)) {
2452 /* ACL tx timeout must be longer than maximum
2453 * link supervision timeout (40.9 seconds) */
63d2bc1b 2454 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 2455 HCI_ACL_TX_TIMEOUT))
bae1f5d9 2456 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2457 }
63d2bc1b 2458}
1da177e4 2459
6039aa73 2460static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 2461{
2462 unsigned int cnt = hdev->acl_cnt;
2463 struct hci_chan *chan;
2464 struct sk_buff *skb;
2465 int quote;
2466
2467 __check_timeout(hdev, cnt);
04837f64 2468
73d80deb 2469 while (hdev->acl_cnt &&
a8c5fb1a 2470 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2471 u32 priority = (skb_peek(&chan->data_q))->priority;
2472 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2473 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2474 skb->len, skb->priority);
73d80deb 2475
ec1cce24
LAD		 2476 /* Stop if priority has changed */
2477 if (skb->priority < priority)
2478 break;
2479
2480 skb = skb_dequeue(&chan->data_q);
2481
73d80deb 2482 hci_conn_enter_active_mode(chan->conn,
04124681 2483 bt_cb(skb)->force_active);
04837f64 2484
1da177e4
LT		 2485 hci_send_frame(skb);
2486 hdev->acl_last_tx = jiffies;
2487
2488 hdev->acl_cnt--;
73d80deb
LAD		 2489 chan->sent++;
2490 chan->conn->sent++;
1da177e4
LT		 2491 }
2492 }
02b20f0b
LAD		 2493
2494 if (cnt != hdev->acl_cnt)
2495 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2496}
2497
6039aa73 2498static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 2499{
63d2bc1b 2500 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2501 struct hci_chan *chan;
2502 struct sk_buff *skb;
2503 int quote;
b71d385a 2504
63d2bc1b 2505 __check_timeout(hdev, cnt);
b71d385a
AE		 2506
2507 while (hdev->block_cnt > 0 &&
a8c5fb1a 2508 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
b71d385a
AE		 2509 u32 priority = (skb_peek(&chan->data_q))->priority;
2510 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2511 int blocks;
2512
2513 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2514 skb->len, skb->priority);
b71d385a
AE		 2515
2516 /* Stop if priority has changed */
2517 if (skb->priority < priority)
2518 break;
2519
2520 skb = skb_dequeue(&chan->data_q);
2521
2522 blocks = __get_blocks(hdev, skb);
2523 if (blocks > hdev->block_cnt)
2524 return;
2525
2526 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2527 bt_cb(skb)->force_active);
b71d385a
AE		 2528
2529 hci_send_frame(skb);
2530 hdev->acl_last_tx = jiffies;
2531
2532 hdev->block_cnt -= blocks;
2533 quote -= blocks;
2534
2535 chan->sent += blocks;
2536 chan->conn->sent += blocks;
2537 }
2538 }
2539
2540 if (cnt != hdev->block_cnt)
2541 hci_prio_recalculate(hdev, ACL_LINK);
2542}
2543
6039aa73 2544static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 2545{
2546 BT_DBG("%s", hdev->name);
2547
2548 if (!hci_conn_num(hdev, ACL_LINK))
2549 return;
2550
2551 switch (hdev->flow_ctl_mode) {
2552 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2553 hci_sched_acl_pkt(hdev);
2554 break;
2555
2556 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2557 hci_sched_acl_blk(hdev);
2558 break;
2559 }
2560}
2561
1da177e4 2562/* Schedule SCO */
6039aa73 2563static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 2564{
2565 struct hci_conn *conn;
2566 struct sk_buff *skb;
2567 int quote;
2568
2569 BT_DBG("%s", hdev->name);
2570
52087a79
LAD		 2571 if (!hci_conn_num(hdev, SCO_LINK))
2572 return;
2573
1da177e4
LT		 2574 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2575 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2576 BT_DBG("skb %p len %d", skb, skb->len);
2577 hci_send_frame(skb);
2578
2579 conn->sent++;
2580 if (conn->sent == ~0)
2581 conn->sent = 0;
2582 }
2583 }
2584}
2585
6039aa73 2586static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 2587{
2588 struct hci_conn *conn;
2589 struct sk_buff *skb;
2590 int quote;
2591
2592 BT_DBG("%s", hdev->name);
2593
52087a79
LAD		 2594 if (!hci_conn_num(hdev, ESCO_LINK))
2595 return;
2596
8fc9ced3
GP		 2597 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2598 &quote))) {
b6a0dc82
MH		 2599 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2600 BT_DBG("skb %p len %d", skb, skb->len);
2601 hci_send_frame(skb);
2602
2603 conn->sent++;
2604 if (conn->sent == ~0)
2605 conn->sent = 0;
2606 }
2607 }
2608}
2609
6039aa73 2610static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 2611{
73d80deb 2612 struct hci_chan *chan;
6ed58ec5 2613 struct sk_buff *skb;
02b20f0b 2614 int quote, cnt, tmp;
6ed58ec5
VT		 2615
2616 BT_DBG("%s", hdev->name);
2617
52087a79
LAD		 2618 if (!hci_conn_num(hdev, LE_LINK))
2619 return;
2620
6ed58ec5
VT		 2621 if (!test_bit(HCI_RAW, &hdev->flags)) {
2622 /* LE tx timeout must be longer than maximum
2623 * link supervision timeout (40.9 seconds) */
bae1f5d9 2624 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 2625 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2626 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2627 }
2628
2629 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2630 tmp = cnt;
73d80deb 2631 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2632 u32 priority = (skb_peek(&chan->data_q))->priority;
2633 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2634 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2635 skb->len, skb->priority);
6ed58ec5 2636
ec1cce24
LAD		 2637 /* Stop if priority has changed */
2638 if (skb->priority < priority)
2639 break;
2640
2641 skb = skb_dequeue(&chan->data_q);
2642
6ed58ec5
VT		 2643 hci_send_frame(skb);
2644 hdev->le_last_tx = jiffies;
2645
2646 cnt--;
73d80deb
LAD		 2647 chan->sent++;
2648 chan->conn->sent++;
6ed58ec5
VT		 2649 }
2650 }
73d80deb 2651
6ed58ec5
VT		 2652 if (hdev->le_pkts)
2653 hdev->le_cnt = cnt;
2654 else
2655 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2656
2657 if (cnt != tmp)
2658 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2659}
2660
3eff45ea 2661static void hci_tx_work(struct work_struct *work)
1da177e4 2662{
3eff45ea 2663 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2664 struct sk_buff *skb;
2665
6ed58ec5 2666 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 2667 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2668
2669 /* Schedule queues and send stuff to HCI driver */
2670
2671 hci_sched_acl(hdev);
2672
2673 hci_sched_sco(hdev);
2674
b6a0dc82
MH		 2675 hci_sched_esco(hdev);
2676
6ed58ec5
VT		 2677 hci_sched_le(hdev);
2678
1da177e4
LT		 2679 /* Send next queued raw (unknown type) packet */
2680 while ((skb = skb_dequeue(&hdev->raw_q)))
2681 hci_send_frame(skb);
1da177e4
LT		 2682}
2683
25985edc 2684/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2685
2686/* ACL data packet */
6039aa73 2687static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2688{
2689 struct hci_acl_hdr *hdr = (void *) skb->data;
2690 struct hci_conn *conn;
2691 __u16 handle, flags;
2692
2693 skb_pull(skb, HCI_ACL_HDR_SIZE);
2694
2695 handle = __le16_to_cpu(hdr->handle);
2696 flags = hci_flags(handle);
2697 handle = hci_handle(handle);
2698
f0e09510 2699 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 2700 handle, flags);
1da177e4
LT		 2701
2702 hdev->stat.acl_rx++;
2703
2704 hci_dev_lock(hdev);
2705 conn = hci_conn_hash_lookup_handle(hdev, handle);
2706 hci_dev_unlock(hdev);
8e87d142 2707
1da177e4 2708 if (conn) {
65983fc7 2709 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2710
671267bf
JH		 2711 hci_dev_lock(hdev);
2712 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2713 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2714 mgmt_device_connected(hdev, &conn->dst, conn->type,
2715 conn->dst_type, 0, NULL, 0,
2716 conn->dev_class);
2717 hci_dev_unlock(hdev);
2718
1da177e4 2719 /* Send to upper protocol */
686ebf28
UF		 2720 l2cap_recv_acldata(conn, skb, flags);
2721 return;
1da177e4 2722 } else {
8e87d142 2723 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 2724 hdev->name, handle);
1da177e4
LT		 2725 }
2726
2727 kfree_skb(skb);
2728}
2729
2730/* SCO data packet */
6039aa73 2731static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 2732{
2733 struct hci_sco_hdr *hdr = (void *) skb->data;
2734 struct hci_conn *conn;
2735 __u16 handle;
2736
2737 skb_pull(skb, HCI_SCO_HDR_SIZE);
2738
2739 handle = __le16_to_cpu(hdr->handle);
2740
f0e09510 2741 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 2742
2743 hdev->stat.sco_rx++;
2744
2745 hci_dev_lock(hdev);
2746 conn = hci_conn_hash_lookup_handle(hdev, handle);
2747 hci_dev_unlock(hdev);
2748
2749 if (conn) {
1da177e4 2750 /* Send to upper protocol */
686ebf28
UF		 2751 sco_recv_scodata(conn, skb);
2752 return;
1da177e4 2753 } else {
8e87d142 2754 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 2755 hdev->name, handle);
1da177e4
LT		 2756 }
2757
2758 kfree_skb(skb);
2759}
2760
b78752cc 2761static void hci_rx_work(struct work_struct *work)
1da177e4 2762{
b78752cc 2763 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2764 struct sk_buff *skb;
2765
2766 BT_DBG("%s", hdev->name);
2767
1da177e4 2768 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2769 /* Send copy to monitor */
2770 hci_send_to_monitor(hdev, skb);
2771
1da177e4
LT		 2772 if (atomic_read(&hdev->promisc)) {
2773 /* Send copy to the sockets */
470fe1b5 2774 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2775 }
2776
2777 if (test_bit(HCI_RAW, &hdev->flags)) {
2778 kfree_skb(skb);
2779 continue;
2780 }
2781
2782 if (test_bit(HCI_INIT, &hdev->flags)) {
2783 /* Don't process data packets in this states. */
0d48d939 2784 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2785 case HCI_ACLDATA_PKT:
2786 case HCI_SCODATA_PKT:
2787 kfree_skb(skb);
2788 continue;
3ff50b79 2789 }
1da177e4
LT		 2790 }
2791
2792 /* Process frame */
0d48d939 2793 switch (bt_cb(skb)->pkt_type) {
1da177e4 2794 case HCI_EVENT_PKT:
b78752cc 2795 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2796 hci_event_packet(hdev, skb);
2797 break;
2798
2799 case HCI_ACLDATA_PKT:
2800 BT_DBG("%s ACL data packet", hdev->name);
2801 hci_acldata_packet(hdev, skb);
2802 break;
2803
2804 case HCI_SCODATA_PKT:
2805 BT_DBG("%s SCO data packet", hdev->name);
2806 hci_scodata_packet(hdev, skb);
2807 break;
2808
2809 default:
2810 kfree_skb(skb);
2811 break;
2812 }
2813 }
1da177e4
LT		 2814}
2815
c347b765 2816static void hci_cmd_work(struct work_struct *work)
1da177e4 2817{
c347b765 2818 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2819 struct sk_buff *skb;
2820
2821 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2822
1da177e4 2823 /* Send queued commands */
5a08ecce
AE		 2824 if (atomic_read(&hdev->cmd_cnt)) {
2825 skb = skb_dequeue(&hdev->cmd_q);
2826 if (!skb)
2827 return;
2828
7585b97a 2829 kfree_skb(hdev->sent_cmd);
1da177e4 2830
70f23020
AE		 2831 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2832 if (hdev->sent_cmd) {
1da177e4
LT		 2833 atomic_dec(&hdev->cmd_cnt);
2834 hci_send_frame(skb);
7bdb8a5c
SJ		 2835 if (test_bit(HCI_RESET, &hdev->flags))
2836 del_timer(&hdev->cmd_timer);
2837 else
2838 mod_timer(&hdev->cmd_timer,
5f246e89 2839 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 2840 } else {
2841 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2842 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2843 }
2844 }
2845}
2519a1fc
AG		 2846
2847int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2848{
2849 /* General inquiry access code (GIAC) */
2850 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2851 struct hci_cp_inquiry cp;
2852
2853 BT_DBG("%s", hdev->name);
2854
2855 if (test_bit(HCI_INQUIRY, &hdev->flags))
2856 return -EINPROGRESS;
2857
4663262c
JH		 2858 inquiry_cache_flush(hdev);
2859
2519a1fc
AG		 2860 memset(&cp, 0, sizeof(cp));
2861 memcpy(&cp.lap, lap, sizeof(cp.lap));
2862 cp.length = length;
2863
2864 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2865}
023d5049
AG		 2866
2867int hci_cancel_inquiry(struct hci_dev *hdev)
2868{
2869 BT_DBG("%s", hdev->name);
2870
2871 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2872 return -EALREADY;
023d5049
AG		 2873
2874 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2875}
31f7956c
AG		 2876
2877u8 bdaddr_to_le(u8 bdaddr_type)
2878{
2879 switch (bdaddr_type) {
2880 case BDADDR_LE_PUBLIC:
2881 return ADDR_LE_DEV_PUBLIC;
2882
2883 default:
2884 /* Fallback to LE Random address type */
2885 return ADDR_LE_DEV_RANDOM;
2886 }
2887}
Linux 6.x block layer and io_uring tree(s)