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Bluetooth: Refactor HCI command skb creation
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
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. */
01178cd4
JH		 110static int __hci_req_sync(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);
53cce22d
JH		 125
126 /* If the request didn't send any commands return immediately */
127 if (skb_queue_empty(&hdev->cmd_q) && atomic_read(&hdev->cmd_cnt)) {
128 hdev->req_status = 0;
129 remove_wait_queue(&hdev->req_wait_q, &wait);
130 return err;
131 }
132
1da177e4
LT		 133 schedule_timeout(timeout);
134
135 remove_wait_queue(&hdev->req_wait_q, &wait);
136
137 if (signal_pending(current))
138 return -EINTR;
139
140 switch (hdev->req_status) {
141 case HCI_REQ_DONE:
e175072f 142 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 143 break;
144
145 case HCI_REQ_CANCELED:
146 err = -hdev->req_result;
147 break;
148
149 default:
150 err = -ETIMEDOUT;
151 break;
3ff50b79 152 }
1da177e4 153
a5040efa 154 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 155
156 BT_DBG("%s end: err %d", hdev->name, err);
157
158 return err;
159}
160
01178cd4
JH		 161static int hci_req_sync(struct hci_dev *hdev,
162 void (*req)(struct hci_dev *hdev, unsigned long opt),
163 unsigned long opt, __u32 timeout)
1da177e4
LT		 164{
165 int ret;
166
7c6a329e
MH		 167 if (!test_bit(HCI_UP, &hdev->flags))
168 return -ENETDOWN;
169
1da177e4
LT		 170 /* Serialize all requests */
171 hci_req_lock(hdev);
01178cd4 172 ret = __hci_req_sync(hdev, req, opt, timeout);
1da177e4
LT		 173 hci_req_unlock(hdev);
174
175 return ret;
176}
177
178static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
179{
180 BT_DBG("%s %ld", hdev->name, opt);
181
182 /* Reset device */
f630cf0d 183 set_bit(HCI_RESET, &hdev->flags);
a9de9248 184 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 185}
186
e61ef499 187static void bredr_init(struct hci_dev *hdev)
1da177e4 188{
2455a3ea
AE		 189 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
190
1da177e4 191 /* Read Local Supported Features */
a9de9248 192 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 193
1143e5a6 194 /* Read Local Version */
a9de9248 195 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 196
197 /* Read BD Address */
198 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 199}
200
e61ef499
AE		 201static void amp_init(struct hci_dev *hdev)
202{
2455a3ea
AE		 203 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
204
e61ef499
AE		 205 /* Read Local Version */
206 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 207
208 /* Read Local AMP Info */
209 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 210
211 /* Read Data Blk size */
212 hci_send_cmd(hdev, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
e61ef499
AE		 213}
214
2177bab5 215static void hci_init1_req(struct hci_dev *hdev, unsigned long opt)
e61ef499
AE		 216{
217 struct sk_buff *skb;
218
219 BT_DBG("%s %ld", hdev->name, opt);
220
221 /* Driver initialization */
222
223 /* Special commands */
224 while ((skb = skb_dequeue(&hdev->driver_init))) {
225 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
226 skb->dev = (void *) hdev;
227
228 skb_queue_tail(&hdev->cmd_q, skb);
229 queue_work(hdev->workqueue, &hdev->cmd_work);
230 }
231 skb_queue_purge(&hdev->driver_init);
232
11778716
AE		 233 /* Reset */
234 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
235 hci_reset_req(hdev, 0);
236
e61ef499
AE		 237 switch (hdev->dev_type) {
238 case HCI_BREDR:
239 bredr_init(hdev);
240 break;
241
242 case HCI_AMP:
243 amp_init(hdev);
244 break;
245
246 default:
247 BT_ERR("Unknown device type %d", hdev->dev_type);
248 break;
249 }
e61ef499
AE		 250}
251
2177bab5
JH		 252static void bredr_setup(struct hci_dev *hdev)
253{
254 struct hci_cp_delete_stored_link_key cp;
255 __le16 param;
256 __u8 flt_type;
257
258 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
259 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
260
261 /* Read Class of Device */
262 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
263
264 /* Read Local Name */
265 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
266
267 /* Read Voice Setting */
268 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
269
270 /* Clear Event Filters */
271 flt_type = HCI_FLT_CLEAR_ALL;
272 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
273
274 /* Connection accept timeout ~20 secs */
275 param = __constant_cpu_to_le16(0x7d00);
276 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
277
278 bacpy(&cp.bdaddr, BDADDR_ANY);
279 cp.delete_all = 0x01;
280 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
281}
282
283static void le_setup(struct hci_dev *hdev)
284{
285 /* Read LE Buffer Size */
286 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
287
288 /* Read LE Local Supported Features */
289 hci_send_cmd(hdev, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
290
291 /* Read LE Advertising Channel TX Power */
292 hci_send_cmd(hdev, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
293
294 /* Read LE White List Size */
295 hci_send_cmd(hdev, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
296
297 /* Read LE Supported States */
298 hci_send_cmd(hdev, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
299}
300
301static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
302{
303 if (lmp_ext_inq_capable(hdev))
304 return 0x02;
305
306 if (lmp_inq_rssi_capable(hdev))
307 return 0x01;
308
309 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
310 hdev->lmp_subver == 0x0757)
311 return 0x01;
312
313 if (hdev->manufacturer == 15) {
314 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
315 return 0x01;
316 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
317 return 0x01;
318 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
319 return 0x01;
320 }
321
322 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
323 hdev->lmp_subver == 0x1805)
324 return 0x01;
325
326 return 0x00;
327}
328
329static void hci_setup_inquiry_mode(struct hci_dev *hdev)
330{
331 u8 mode;
332
333 mode = hci_get_inquiry_mode(hdev);
334
335 hci_send_cmd(hdev, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
336}
337
338static void hci_setup_event_mask(struct hci_dev *hdev)
339{
340 /* The second byte is 0xff instead of 0x9f (two reserved bits
341 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
342 * command otherwise.
343 */
344 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
345
346 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
347 * any event mask for pre 1.2 devices.
348 */
349 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
350 return;
351
352 if (lmp_bredr_capable(hdev)) {
353 events[4] |= 0x01; /* Flow Specification Complete */
354 events[4] |= 0x02; /* Inquiry Result with RSSI */
355 events[4] |= 0x04; /* Read Remote Extended Features Complete */
356 events[5] |= 0x08; /* Synchronous Connection Complete */
357 events[5] |= 0x10; /* Synchronous Connection Changed */
358 }
359
360 if (lmp_inq_rssi_capable(hdev))
361 events[4] |= 0x02; /* Inquiry Result with RSSI */
362
363 if (lmp_sniffsubr_capable(hdev))
364 events[5] |= 0x20; /* Sniff Subrating */
365
366 if (lmp_pause_enc_capable(hdev))
367 events[5] |= 0x80; /* Encryption Key Refresh Complete */
368
369 if (lmp_ext_inq_capable(hdev))
370 events[5] |= 0x40; /* Extended Inquiry Result */
371
372 if (lmp_no_flush_capable(hdev))
373 events[7] |= 0x01; /* Enhanced Flush Complete */
374
375 if (lmp_lsto_capable(hdev))
376 events[6] |= 0x80; /* Link Supervision Timeout Changed */
377
378 if (lmp_ssp_capable(hdev)) {
379 events[6] |= 0x01; /* IO Capability Request */
380 events[6] |= 0x02; /* IO Capability Response */
381 events[6] |= 0x04; /* User Confirmation Request */
382 events[6] |= 0x08; /* User Passkey Request */
383 events[6] |= 0x10; /* Remote OOB Data Request */
384 events[6] |= 0x20; /* Simple Pairing Complete */
385 events[7] |= 0x04; /* User Passkey Notification */
386 events[7] |= 0x08; /* Keypress Notification */
387 events[7] |= 0x10; /* Remote Host Supported
388 * Features Notification
389 */
390 }
391
392 if (lmp_le_capable(hdev))
393 events[7] |= 0x20; /* LE Meta-Event */
394
395 hci_send_cmd(hdev, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
396
397 if (lmp_le_capable(hdev)) {
398 memset(events, 0, sizeof(events));
399 events[0] = 0x1f;
400 hci_send_cmd(hdev, HCI_OP_LE_SET_EVENT_MASK,
401 sizeof(events), events);
402 }
403}
404
405static void hci_init2_req(struct hci_dev *hdev, unsigned long opt)
406{
407 if (lmp_bredr_capable(hdev))
408 bredr_setup(hdev);
409
410 if (lmp_le_capable(hdev))
411 le_setup(hdev);
412
413 hci_setup_event_mask(hdev);
414
415 if (hdev->hci_ver > BLUETOOTH_VER_1_1)
416 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
417
418 if (lmp_ssp_capable(hdev)) {
419 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
420 u8 mode = 0x01;
421 hci_send_cmd(hdev, HCI_OP_WRITE_SSP_MODE,
422 sizeof(mode), &mode);
423 } else {
424 struct hci_cp_write_eir cp;
425
426 memset(hdev->eir, 0, sizeof(hdev->eir));
427 memset(&cp, 0, sizeof(cp));
428
429 hci_send_cmd(hdev, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
430 }
431 }
432
433 if (lmp_inq_rssi_capable(hdev))
434 hci_setup_inquiry_mode(hdev);
435
436 if (lmp_inq_tx_pwr_capable(hdev))
437 hci_send_cmd(hdev, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
438
439 if (lmp_ext_feat_capable(hdev)) {
440 struct hci_cp_read_local_ext_features cp;
441
442 cp.page = 0x01;
443 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_EXT_FEATURES, sizeof(cp),
444 &cp);
445 }
446
447 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
448 u8 enable = 1;
449 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
450 &enable);
451 }
452}
453
454static void hci_setup_link_policy(struct hci_dev *hdev)
455{
456 struct hci_cp_write_def_link_policy cp;
457 u16 link_policy = 0;
458
459 if (lmp_rswitch_capable(hdev))
460 link_policy |= HCI_LP_RSWITCH;
461 if (lmp_hold_capable(hdev))
462 link_policy |= HCI_LP_HOLD;
463 if (lmp_sniff_capable(hdev))
464 link_policy |= HCI_LP_SNIFF;
465 if (lmp_park_capable(hdev))
466 link_policy |= HCI_LP_PARK;
467
468 cp.policy = cpu_to_le16(link_policy);
469 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
470}
471
472static void hci_set_le_support(struct hci_dev *hdev)
473{
474 struct hci_cp_write_le_host_supported cp;
475
476 memset(&cp, 0, sizeof(cp));
477
478 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
479 cp.le = 0x01;
480 cp.simul = lmp_le_br_capable(hdev);
481 }
482
483 if (cp.le != lmp_host_le_capable(hdev))
484 hci_send_cmd(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
485 &cp);
486}
487
488static void hci_init3_req(struct hci_dev *hdev, unsigned long opt)
489{
490 if (hdev->commands[5] & 0x10)
491 hci_setup_link_policy(hdev);
492
493 if (lmp_le_capable(hdev))
494 hci_set_le_support(hdev);
495}
496
497static int __hci_init(struct hci_dev *hdev)
498{
499 int err;
500
501 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
502 if (err < 0)
503 return err;
504
505 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
506 * BR/EDR/LE type controllers. AMP controllers only need the
507 * first stage init.
508 */
509 if (hdev->dev_type != HCI_BREDR)
510 return 0;
511
512 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
513 if (err < 0)
514 return err;
515
516 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
517}
518
1da177e4
LT		 519static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
520{
521 __u8 scan = opt;
522
523 BT_DBG("%s %x", hdev->name, scan);
524
525 /* Inquiry and Page scans */
a9de9248 526 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 527}
528
529static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
530{
531 __u8 auth = opt;
532
533 BT_DBG("%s %x", hdev->name, auth);
534
535 /* Authentication */
a9de9248 536 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 537}
538
539static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
540{
541 __u8 encrypt = opt;
542
543 BT_DBG("%s %x", hdev->name, encrypt);
544
e4e8e37c 545 /* Encryption */
a9de9248 546 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 547}
548
e4e8e37c
MH		 549static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
550{
551 __le16 policy = cpu_to_le16(opt);
552
a418b893 553 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 554
555 /* Default link policy */
556 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
557}
558
8e87d142 559/* Get HCI device by index.
1da177e4
LT		 560 * Device is held on return. */
561struct hci_dev *hci_dev_get(int index)
562{
8035ded4 563 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 564
565 BT_DBG("%d", index);
566
567 if (index < 0)
568 return NULL;
569
570 read_lock(&hci_dev_list_lock);
8035ded4 571 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 572 if (d->id == index) {
573 hdev = hci_dev_hold(d);
574 break;
575 }
576 }
577 read_unlock(&hci_dev_list_lock);
578 return hdev;
579}
1da177e4
LT		 580
581/* ---- Inquiry support ---- */
ff9ef578 582
30dc78e1
JH		 583bool hci_discovery_active(struct hci_dev *hdev)
584{
585 struct discovery_state *discov = &hdev->discovery;
586
6fbe195d 587 switch (discov->state) {
343f935b 588 case DISCOVERY_FINDING:
6fbe195d 589 case DISCOVERY_RESOLVING:
30dc78e1
JH		 590 return true;
591
6fbe195d
AG		 592 default:
593 return false;
594 }
30dc78e1
JH		 595}
596
ff9ef578
JH		 597void hci_discovery_set_state(struct hci_dev *hdev, int state)
598{
599 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
600
601 if (hdev->discovery.state == state)
602 return;
603
604 switch (state) {
605 case DISCOVERY_STOPPED:
7b99b659
AG		 606 if (hdev->discovery.state != DISCOVERY_STARTING)
607 mgmt_discovering(hdev, 0);
ff9ef578
JH		 608 break;
609 case DISCOVERY_STARTING:
610 break;
343f935b 611 case DISCOVERY_FINDING:
ff9ef578
JH		 612 mgmt_discovering(hdev, 1);
613 break;
30dc78e1
JH		 614 case DISCOVERY_RESOLVING:
615 break;
ff9ef578
JH		 616 case DISCOVERY_STOPPING:
617 break;
618 }
619
620 hdev->discovery.state = state;
621}
622
1da177e4
LT		 623static void inquiry_cache_flush(struct hci_dev *hdev)
624{
30883512 625 struct discovery_state *cache = &hdev->discovery;
b57c1a56 626 struct inquiry_entry *p, *n;
1da177e4 627
561aafbc
JH		 628 list_for_each_entry_safe(p, n, &cache->all, all) {
629 list_del(&p->all);
b57c1a56 630 kfree(p);
1da177e4 631 }
561aafbc
JH		 632
633 INIT_LIST_HEAD(&cache->unknown);
634 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 635}
636
a8c5fb1a
GP		 637struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
638 bdaddr_t *bdaddr)
1da177e4 639{
30883512 640 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 641 struct inquiry_entry *e;
642
6ed93dc6 643 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 644
561aafbc
JH		 645 list_for_each_entry(e, &cache->all, all) {
646 if (!bacmp(&e->data.bdaddr, bdaddr))
647 return e;
648 }
649
650 return NULL;
651}
652
653struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 654 bdaddr_t *bdaddr)
561aafbc 655{
30883512 656 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 657 struct inquiry_entry *e;
658
6ed93dc6 659 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 660
661 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 662 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 663 return e;
664 }
665
666 return NULL;
1da177e4
LT		 667}
668
30dc78e1 669struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 670 bdaddr_t *bdaddr,
671 int state)
30dc78e1
JH		 672{
673 struct discovery_state *cache = &hdev->discovery;
674 struct inquiry_entry *e;
675
6ed93dc6 676 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 677
678 list_for_each_entry(e, &cache->resolve, list) {
679 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
680 return e;
681 if (!bacmp(&e->data.bdaddr, bdaddr))
682 return e;
683 }
684
685 return NULL;
686}
687
a3d4e20a 688void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 689 struct inquiry_entry *ie)
a3d4e20a
JH		 690{
691 struct discovery_state *cache = &hdev->discovery;
692 struct list_head *pos = &cache->resolve;
693 struct inquiry_entry *p;
694
695 list_del(&ie->list);
696
697 list_for_each_entry(p, &cache->resolve, list) {
698 if (p->name_state != NAME_PENDING &&
a8c5fb1a 699 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 700 break;
701 pos = &p->list;
702 }
703
704 list_add(&ie->list, pos);
705}
706
3175405b 707bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 708 bool name_known, bool *ssp)
1da177e4 709{
30883512 710 struct discovery_state *cache = &hdev->discovery;
70f23020 711 struct inquiry_entry *ie;
1da177e4 712
6ed93dc6 713 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 714
2b2fec4d
SJ		 715 hci_remove_remote_oob_data(hdev, &data->bdaddr);
716
388fc8fa
JH		 717 if (ssp)
718 *ssp = data->ssp_mode;
719
70f23020 720 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 721 if (ie) {
388fc8fa
JH		 722 if (ie->data.ssp_mode && ssp)
723 *ssp = true;
724
a3d4e20a 725 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 726 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 727 ie->data.rssi = data->rssi;
728 hci_inquiry_cache_update_resolve(hdev, ie);
729 }
730
561aafbc 731 goto update;
a3d4e20a 732 }
561aafbc
JH		 733
734 /* Entry not in the cache. Add new one. */
735 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
736 if (!ie)
3175405b 737 return false;
561aafbc
JH		 738
739 list_add(&ie->all, &cache->all);
740
741 if (name_known) {
742 ie->name_state = NAME_KNOWN;
743 } else {
744 ie->name_state = NAME_NOT_KNOWN;
745 list_add(&ie->list, &cache->unknown);
746 }
70f23020 747
561aafbc
JH		 748update:
749 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 750 ie->name_state != NAME_PENDING) {
561aafbc
JH		 751 ie->name_state = NAME_KNOWN;
752 list_del(&ie->list);
1da177e4
LT		 753 }
754
70f23020
AE		 755 memcpy(&ie->data, data, sizeof(*data));
756 ie->timestamp = jiffies;
1da177e4 757 cache->timestamp = jiffies;
3175405b
JH		 758
759 if (ie->name_state == NAME_NOT_KNOWN)
760 return false;
761
762 return true;
1da177e4
LT		 763}
764
765static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
766{
30883512 767 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 768 struct inquiry_info *info = (struct inquiry_info *) buf;
769 struct inquiry_entry *e;
770 int copied = 0;
771
561aafbc 772 list_for_each_entry(e, &cache->all, all) {
1da177e4 773 struct inquiry_data *data = &e->data;
b57c1a56
JH		 774
775 if (copied >= num)
776 break;
777
1da177e4
LT		 778 bacpy(&info->bdaddr, &data->bdaddr);
779 info->pscan_rep_mode = data->pscan_rep_mode;
780 info->pscan_period_mode = data->pscan_period_mode;
781 info->pscan_mode = data->pscan_mode;
782 memcpy(info->dev_class, data->dev_class, 3);
783 info->clock_offset = data->clock_offset;
b57c1a56 784
1da177e4 785 info++;
b57c1a56 786 copied++;
1da177e4
LT		 787 }
788
789 BT_DBG("cache %p, copied %d", cache, copied);
790 return copied;
791}
792
793static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
794{
795 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
796 struct hci_cp_inquiry cp;
797
798 BT_DBG("%s", hdev->name);
799
800 if (test_bit(HCI_INQUIRY, &hdev->flags))
801 return;
802
803 /* Start Inquiry */
804 memcpy(&cp.lap, &ir->lap, 3);
805 cp.length = ir->length;
806 cp.num_rsp = ir->num_rsp;
a9de9248 807 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 808}
809
810int hci_inquiry(void __user *arg)
811{
812 __u8 __user *ptr = arg;
813 struct hci_inquiry_req ir;
814 struct hci_dev *hdev;
815 int err = 0, do_inquiry = 0, max_rsp;
816 long timeo;
817 __u8 *buf;
818
819 if (copy_from_user(&ir, ptr, sizeof(ir)))
820 return -EFAULT;
821
5a08ecce
AE		 822 hdev = hci_dev_get(ir.dev_id);
823 if (!hdev)
1da177e4
LT		 824 return -ENODEV;
825
09fd0de5 826 hci_dev_lock(hdev);
8e87d142 827 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 828 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 829 inquiry_cache_flush(hdev);
830 do_inquiry = 1;
831 }
09fd0de5 832 hci_dev_unlock(hdev);
1da177e4 833
04837f64 834 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 835
836 if (do_inquiry) {
01178cd4
JH		 837 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
838 timeo);
70f23020
AE		 839 if (err < 0)
840 goto done;
841 }
1da177e4 842
8fc9ced3
GP		 843 /* for unlimited number of responses we will use buffer with
844 * 255 entries
845 */
1da177e4
LT		 846 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
847
848 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
849 * copy it to the user space.
850 */
01df8c31 851 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 852 if (!buf) {
1da177e4
LT		 853 err = -ENOMEM;
854 goto done;
855 }
856
09fd0de5 857 hci_dev_lock(hdev);
1da177e4 858 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 859 hci_dev_unlock(hdev);
1da177e4
LT		 860
861 BT_DBG("num_rsp %d", ir.num_rsp);
862
863 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
864 ptr += sizeof(ir);
865 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 866 ir.num_rsp))
1da177e4 867 err = -EFAULT;
8e87d142 868 } else
1da177e4
LT		 869 err = -EFAULT;
870
871 kfree(buf);
872
873done:
874 hci_dev_put(hdev);
875 return err;
876}
877
3f0f524b
JH		 878static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
879{
880 u8 ad_len = 0, flags = 0;
881 size_t name_len;
882
883 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
884 flags |= LE_AD_GENERAL;
885
886 if (!lmp_bredr_capable(hdev))
887 flags |= LE_AD_NO_BREDR;
888
889 if (lmp_le_br_capable(hdev))
890 flags |= LE_AD_SIM_LE_BREDR_CTRL;
891
892 if (lmp_host_le_br_capable(hdev))
893 flags |= LE_AD_SIM_LE_BREDR_HOST;
894
895 if (flags) {
896 BT_DBG("adv flags 0x%02x", flags);
897
898 ptr[0] = 2;
899 ptr[1] = EIR_FLAGS;
900 ptr[2] = flags;
901
902 ad_len += 3;
903 ptr += 3;
904 }
905
906 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
907 ptr[0] = 2;
908 ptr[1] = EIR_TX_POWER;
909 ptr[2] = (u8) hdev->adv_tx_power;
910
911 ad_len += 3;
912 ptr += 3;
913 }
914
915 name_len = strlen(hdev->dev_name);
916 if (name_len > 0) {
917 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
918
919 if (name_len > max_len) {
920 name_len = max_len;
921 ptr[1] = EIR_NAME_SHORT;
922 } else
923 ptr[1] = EIR_NAME_COMPLETE;
924
925 ptr[0] = name_len + 1;
926
927 memcpy(ptr + 2, hdev->dev_name, name_len);
928
929 ad_len += (name_len + 2);
930 ptr += (name_len + 2);
931 }
932
933 return ad_len;
934}
935
936int hci_update_ad(struct hci_dev *hdev)
937{
938 struct hci_cp_le_set_adv_data cp;
939 u8 len;
940 int err;
941
942 hci_dev_lock(hdev);
943
944 if (!lmp_le_capable(hdev)) {
945 err = -EINVAL;
946 goto unlock;
947 }
948
949 memset(&cp, 0, sizeof(cp));
950
951 len = create_ad(hdev, cp.data);
952
953 if (hdev->adv_data_len == len &&
954 memcmp(cp.data, hdev->adv_data, len) == 0) {
955 err = 0;
956 goto unlock;
957 }
958
959 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
960 hdev->adv_data_len = len;
961
962 cp.length = len;
963 err = hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
964
965unlock:
966 hci_dev_unlock(hdev);
967
968 return err;
969}
970
1da177e4
LT		 971/* ---- HCI ioctl helpers ---- */
972
973int hci_dev_open(__u16 dev)
974{
975 struct hci_dev *hdev;
976 int ret = 0;
977
5a08ecce
AE		 978 hdev = hci_dev_get(dev);
979 if (!hdev)
1da177e4
LT		 980 return -ENODEV;
981
982 BT_DBG("%s %p", hdev->name, hdev);
983
984 hci_req_lock(hdev);
985
94324962
JH		 986 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
987 ret = -ENODEV;
988 goto done;
989 }
990
611b30f7
MH		 991 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
992 ret = -ERFKILL;
993 goto done;
994 }
995
1da177e4
LT		 996 if (test_bit(HCI_UP, &hdev->flags)) {
997 ret = -EALREADY;
998 goto done;
999 }
1000
1001 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1002 set_bit(HCI_RAW, &hdev->flags);
1003
07e3b94a
AE		 1004 /* Treat all non BR/EDR controllers as raw devices if
1005 enable_hs is not set */
1006 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 1007 set_bit(HCI_RAW, &hdev->flags);
1008
1da177e4
LT		 1009 if (hdev->open(hdev)) {
1010 ret = -EIO;
1011 goto done;
1012 }
1013
1014 if (!test_bit(HCI_RAW, &hdev->flags)) {
1015 atomic_set(&hdev->cmd_cnt, 1);
1016 set_bit(HCI_INIT, &hdev->flags);
a5040efa 1017 hdev->init_last_cmd = 0;
1da177e4 1018
2177bab5 1019 ret = __hci_init(hdev);
1da177e4
LT		 1020
1021 clear_bit(HCI_INIT, &hdev->flags);
1022 }
1023
1024 if (!ret) {
1025 hci_dev_hold(hdev);
1026 set_bit(HCI_UP, &hdev->flags);
1027 hci_notify(hdev, HCI_DEV_UP);
3f0f524b 1028 hci_update_ad(hdev);
bb4b2a9a
AE		 1029 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1030 mgmt_valid_hdev(hdev)) {
09fd0de5 1031 hci_dev_lock(hdev);
744cf19e 1032 mgmt_powered(hdev, 1);
09fd0de5 1033 hci_dev_unlock(hdev);
56e5cb86 1034 }
8e87d142 1035 } else {
1da177e4 1036 /* Init failed, cleanup */
3eff45ea 1037 flush_work(&hdev->tx_work);
c347b765 1038 flush_work(&hdev->cmd_work);
b78752cc 1039 flush_work(&hdev->rx_work);
1da177e4
LT		 1040
1041 skb_queue_purge(&hdev->cmd_q);
1042 skb_queue_purge(&hdev->rx_q);
1043
1044 if (hdev->flush)
1045 hdev->flush(hdev);
1046
1047 if (hdev->sent_cmd) {
1048 kfree_skb(hdev->sent_cmd);
1049 hdev->sent_cmd = NULL;
1050 }
1051
1052 hdev->close(hdev);
1053 hdev->flags = 0;
1054 }
1055
1056done:
1057 hci_req_unlock(hdev);
1058 hci_dev_put(hdev);
1059 return ret;
1060}
1061
1062static int hci_dev_do_close(struct hci_dev *hdev)
1063{
1064 BT_DBG("%s %p", hdev->name, hdev);
1065
28b75a89
AG		 1066 cancel_work_sync(&hdev->le_scan);
1067
78c04c0b
VCG		 1068 cancel_delayed_work(&hdev->power_off);
1069
1da177e4
LT		 1070 hci_req_cancel(hdev, ENODEV);
1071 hci_req_lock(hdev);
1072
1073 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 1074 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1075 hci_req_unlock(hdev);
1076 return 0;
1077 }
1078
3eff45ea
GP		 1079 /* Flush RX and TX works */
1080 flush_work(&hdev->tx_work);
b78752cc 1081 flush_work(&hdev->rx_work);
1da177e4 1082
16ab91ab 1083 if (hdev->discov_timeout > 0) {
e0f9309f 1084 cancel_delayed_work(&hdev->discov_off);
16ab91ab 1085 hdev->discov_timeout = 0;
5e5282bb 1086 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 1087 }
1088
a8b2d5c2 1089 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 1090 cancel_delayed_work(&hdev->service_cache);
1091
7ba8b4be
AG		 1092 cancel_delayed_work_sync(&hdev->le_scan_disable);
1093
09fd0de5 1094 hci_dev_lock(hdev);
1da177e4
LT		 1095 inquiry_cache_flush(hdev);
1096 hci_conn_hash_flush(hdev);
09fd0de5 1097 hci_dev_unlock(hdev);
1da177e4
LT		 1098
1099 hci_notify(hdev, HCI_DEV_DOWN);
1100
1101 if (hdev->flush)
1102 hdev->flush(hdev);
1103
1104 /* Reset device */
1105 skb_queue_purge(&hdev->cmd_q);
1106 atomic_set(&hdev->cmd_cnt, 1);
8af59467 1107 if (!test_bit(HCI_RAW, &hdev->flags) &&
a6c511c6 1108 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1da177e4 1109 set_bit(HCI_INIT, &hdev->flags);
01178cd4 1110 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1da177e4
LT		 1111 clear_bit(HCI_INIT, &hdev->flags);
1112 }
1113
c347b765
GP		 1114 /* flush cmd work */
1115 flush_work(&hdev->cmd_work);
1da177e4
LT		 1116
1117 /* Drop queues */
1118 skb_queue_purge(&hdev->rx_q);
1119 skb_queue_purge(&hdev->cmd_q);
1120 skb_queue_purge(&hdev->raw_q);
1121
1122 /* Drop last sent command */
1123 if (hdev->sent_cmd) {
b79f44c1 1124 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 1125 kfree_skb(hdev->sent_cmd);
1126 hdev->sent_cmd = NULL;
1127 }
1128
1129 /* After this point our queues are empty
1130 * and no tasks are scheduled. */
1131 hdev->close(hdev);
1132
bb4b2a9a
AE		 1133 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1134 mgmt_valid_hdev(hdev)) {
8ee56540
MH		 1135 hci_dev_lock(hdev);
1136 mgmt_powered(hdev, 0);
1137 hci_dev_unlock(hdev);
1138 }
5add6af8 1139
1da177e4
LT		 1140 /* Clear flags */
1141 hdev->flags = 0;
1142
ced5c338
AE		 1143 /* Controller radio is available but is currently powered down */
1144 hdev->amp_status = 0;
1145
e59fda8d 1146 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1147 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 1148
1da177e4
LT		 1149 hci_req_unlock(hdev);
1150
1151 hci_dev_put(hdev);
1152 return 0;
1153}
1154
1155int hci_dev_close(__u16 dev)
1156{
1157 struct hci_dev *hdev;
1158 int err;
1159
70f23020
AE		 1160 hdev = hci_dev_get(dev);
1161 if (!hdev)
1da177e4 1162 return -ENODEV;
8ee56540
MH		 1163
1164 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1165 cancel_delayed_work(&hdev->power_off);
1166
1da177e4 1167 err = hci_dev_do_close(hdev);
8ee56540 1168
1da177e4
LT		 1169 hci_dev_put(hdev);
1170 return err;
1171}
1172
1173int hci_dev_reset(__u16 dev)
1174{
1175 struct hci_dev *hdev;
1176 int ret = 0;
1177
70f23020
AE		 1178 hdev = hci_dev_get(dev);
1179 if (!hdev)
1da177e4
LT		 1180 return -ENODEV;
1181
1182 hci_req_lock(hdev);
1da177e4
LT		 1183
1184 if (!test_bit(HCI_UP, &hdev->flags))
1185 goto done;
1186
1187 /* Drop queues */
1188 skb_queue_purge(&hdev->rx_q);
1189 skb_queue_purge(&hdev->cmd_q);
1190
09fd0de5 1191 hci_dev_lock(hdev);
1da177e4
LT		 1192 inquiry_cache_flush(hdev);
1193 hci_conn_hash_flush(hdev);
09fd0de5 1194 hci_dev_unlock(hdev);
1da177e4
LT		 1195
1196 if (hdev->flush)
1197 hdev->flush(hdev);
1198
8e87d142 1199 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1200 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 1201
1202 if (!test_bit(HCI_RAW, &hdev->flags))
01178cd4 1203 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1da177e4
LT		 1204
1205done:
1da177e4
LT		 1206 hci_req_unlock(hdev);
1207 hci_dev_put(hdev);
1208 return ret;
1209}
1210
1211int hci_dev_reset_stat(__u16 dev)
1212{
1213 struct hci_dev *hdev;
1214 int ret = 0;
1215
70f23020
AE		 1216 hdev = hci_dev_get(dev);
1217 if (!hdev)
1da177e4
LT		 1218 return -ENODEV;
1219
1220 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1221
1222 hci_dev_put(hdev);
1223
1224 return ret;
1225}
1226
1227int hci_dev_cmd(unsigned int cmd, void __user *arg)
1228{
1229 struct hci_dev *hdev;
1230 struct hci_dev_req dr;
1231 int err = 0;
1232
1233 if (copy_from_user(&dr, arg, sizeof(dr)))
1234 return -EFAULT;
1235
70f23020
AE		 1236 hdev = hci_dev_get(dr.dev_id);
1237 if (!hdev)
1da177e4
LT		 1238 return -ENODEV;
1239
1240 switch (cmd) {
1241 case HCISETAUTH:
01178cd4
JH		 1242 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1243 HCI_INIT_TIMEOUT);
1da177e4
LT		 1244 break;
1245
1246 case HCISETENCRYPT:
1247 if (!lmp_encrypt_capable(hdev)) {
1248 err = -EOPNOTSUPP;
1249 break;
1250 }
1251
1252 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1253 /* Auth must be enabled first */
01178cd4
JH		 1254 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1255 HCI_INIT_TIMEOUT);
1da177e4
LT		 1256 if (err)
1257 break;
1258 }
1259
01178cd4
JH		 1260 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1261 HCI_INIT_TIMEOUT);
1da177e4
LT		 1262 break;
1263
1264 case HCISETSCAN:
01178cd4
JH		 1265 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1266 HCI_INIT_TIMEOUT);
1da177e4
LT		 1267 break;
1268
1da177e4 1269 case HCISETLINKPOL:
01178cd4
JH		 1270 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1271 HCI_INIT_TIMEOUT);
1da177e4
LT		 1272 break;
1273
1274 case HCISETLINKMODE:
e4e8e37c
MH		 1275 hdev->link_mode = ((__u16) dr.dev_opt) &
1276 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1277 break;
1278
1279 case HCISETPTYPE:
1280 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1281 break;
1282
1283 case HCISETACLMTU:
e4e8e37c
MH		 1284 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1285 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1286 break;
1287
1288 case HCISETSCOMTU:
e4e8e37c
MH		 1289 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1290 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1291 break;
1292
1293 default:
1294 err = -EINVAL;
1295 break;
1296 }
e4e8e37c 1297
1da177e4
LT		 1298 hci_dev_put(hdev);
1299 return err;
1300}
1301
1302int hci_get_dev_list(void __user *arg)
1303{
8035ded4 1304 struct hci_dev *hdev;
1da177e4
LT		 1305 struct hci_dev_list_req *dl;
1306 struct hci_dev_req *dr;
1da177e4
LT		 1307 int n = 0, size, err;
1308 __u16 dev_num;
1309
1310 if (get_user(dev_num, (__u16 __user *) arg))
1311 return -EFAULT;
1312
1313 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1314 return -EINVAL;
1315
1316 size = sizeof(*dl) + dev_num * sizeof(*dr);
1317
70f23020
AE		 1318 dl = kzalloc(size, GFP_KERNEL);
1319 if (!dl)
1da177e4
LT		 1320 return -ENOMEM;
1321
1322 dr = dl->dev_req;
1323
f20d09d5 1324 read_lock(&hci_dev_list_lock);
8035ded4 1325 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1326 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1327 cancel_delayed_work(&hdev->power_off);
c542a06c 1328
a8b2d5c2
JH		 1329 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1330 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1331
1da177e4
LT		 1332 (dr + n)->dev_id = hdev->id;
1333 (dr + n)->dev_opt = hdev->flags;
c542a06c 1334
1da177e4
LT		 1335 if (++n >= dev_num)
1336 break;
1337 }
f20d09d5 1338 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1339
1340 dl->dev_num = n;
1341 size = sizeof(*dl) + n * sizeof(*dr);
1342
1343 err = copy_to_user(arg, dl, size);
1344 kfree(dl);
1345
1346 return err ? -EFAULT : 0;
1347}
1348
1349int hci_get_dev_info(void __user *arg)
1350{
1351 struct hci_dev *hdev;
1352 struct hci_dev_info di;
1353 int err = 0;
1354
1355 if (copy_from_user(&di, arg, sizeof(di)))
1356 return -EFAULT;
1357
70f23020
AE		 1358 hdev = hci_dev_get(di.dev_id);
1359 if (!hdev)
1da177e4
LT		 1360 return -ENODEV;
1361
a8b2d5c2 1362 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1363 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1364
a8b2d5c2
JH		 1365 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1366 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1367
1da177e4
LT		 1368 strcpy(di.name, hdev->name);
1369 di.bdaddr = hdev->bdaddr;
943da25d 1370 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1371 di.flags = hdev->flags;
1372 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1373 if (lmp_bredr_capable(hdev)) {
1374 di.acl_mtu = hdev->acl_mtu;
1375 di.acl_pkts = hdev->acl_pkts;
1376 di.sco_mtu = hdev->sco_mtu;
1377 di.sco_pkts = hdev->sco_pkts;
1378 } else {
1379 di.acl_mtu = hdev->le_mtu;
1380 di.acl_pkts = hdev->le_pkts;
1381 di.sco_mtu = 0;
1382 di.sco_pkts = 0;
1383 }
1da177e4
LT		 1384 di.link_policy = hdev->link_policy;
1385 di.link_mode = hdev->link_mode;
1386
1387 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1388 memcpy(&di.features, &hdev->features, sizeof(di.features));
1389
1390 if (copy_to_user(arg, &di, sizeof(di)))
1391 err = -EFAULT;
1392
1393 hci_dev_put(hdev);
1394
1395 return err;
1396}
1397
1398/* ---- Interface to HCI drivers ---- */
1399
611b30f7
MH		 1400static int hci_rfkill_set_block(void *data, bool blocked)
1401{
1402 struct hci_dev *hdev = data;
1403
1404 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1405
1406 if (!blocked)
1407 return 0;
1408
1409 hci_dev_do_close(hdev);
1410
1411 return 0;
1412}
1413
1414static const struct rfkill_ops hci_rfkill_ops = {
1415 .set_block = hci_rfkill_set_block,
1416};
1417
ab81cbf9
JH		 1418static void hci_power_on(struct work_struct *work)
1419{
1420 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1421
1422 BT_DBG("%s", hdev->name);
1423
1424 if (hci_dev_open(hdev->id) < 0)
1425 return;
1426
a8b2d5c2 1427 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
19202573
JH		 1428 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1429 HCI_AUTO_OFF_TIMEOUT);
ab81cbf9 1430
a8b2d5c2 1431 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1432 mgmt_index_added(hdev);
ab81cbf9
JH		 1433}
1434
1435static void hci_power_off(struct work_struct *work)
1436{
3243553f 1437 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 1438 power_off.work);
ab81cbf9
JH		 1439
1440 BT_DBG("%s", hdev->name);
1441
8ee56540 1442 hci_dev_do_close(hdev);
ab81cbf9
JH		 1443}
1444
16ab91ab
JH		 1445static void hci_discov_off(struct work_struct *work)
1446{
1447 struct hci_dev *hdev;
1448 u8 scan = SCAN_PAGE;
1449
1450 hdev = container_of(work, struct hci_dev, discov_off.work);
1451
1452 BT_DBG("%s", hdev->name);
1453
09fd0de5 1454 hci_dev_lock(hdev);
16ab91ab
JH		 1455
1456 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1457
1458 hdev->discov_timeout = 0;
1459
09fd0de5 1460 hci_dev_unlock(hdev);
16ab91ab
JH		 1461}
1462
2aeb9a1a
JH		 1463int hci_uuids_clear(struct hci_dev *hdev)
1464{
4821002c 1465 struct bt_uuid *uuid, *tmp;
2aeb9a1a 1466
4821002c
JH		 1467 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1468 list_del(&uuid->list);
2aeb9a1a
JH		 1469 kfree(uuid);
1470 }
1471
1472 return 0;
1473}
1474
55ed8ca1
JH		 1475int hci_link_keys_clear(struct hci_dev *hdev)
1476{
1477 struct list_head *p, *n;
1478
1479 list_for_each_safe(p, n, &hdev->link_keys) {
1480 struct link_key *key;
1481
1482 key = list_entry(p, struct link_key, list);
1483
1484 list_del(p);
1485 kfree(key);
1486 }
1487
1488 return 0;
1489}
1490
b899efaf
VCG		 1491int hci_smp_ltks_clear(struct hci_dev *hdev)
1492{
1493 struct smp_ltk *k, *tmp;
1494
1495 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1496 list_del(&k->list);
1497 kfree(k);
1498 }
1499
1500 return 0;
1501}
1502
55ed8ca1
JH		 1503struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1504{
8035ded4 1505 struct link_key *k;
55ed8ca1 1506
8035ded4 1507 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1508 if (bacmp(bdaddr, &k->bdaddr) == 0)
1509 return k;
55ed8ca1
JH		 1510
1511 return NULL;
1512}
1513
745c0ce3 1514static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 1515 u8 key_type, u8 old_key_type)
d25e28ab
JH		 1516{
1517 /* Legacy key */
1518 if (key_type < 0x03)
745c0ce3 1519 return true;
d25e28ab
JH		 1520
1521 /* Debug keys are insecure so don't store them persistently */
1522 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1523 return false;
d25e28ab
JH		 1524
1525 /* Changed combination key and there's no previous one */
1526 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1527 return false;
d25e28ab
JH		 1528
1529 /* Security mode 3 case */
1530 if (!conn)
745c0ce3 1531 return true;
d25e28ab
JH		 1532
1533 /* Neither local nor remote side had no-bonding as requirement */
1534 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1535 return true;
d25e28ab
JH		 1536
1537 /* Local side had dedicated bonding as requirement */
1538 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1539 return true;
d25e28ab
JH		 1540
1541 /* Remote side had dedicated bonding as requirement */
1542 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1543 return true;
d25e28ab
JH		 1544
1545 /* If none of the above criteria match, then don't store the key
1546 * persistently */
745c0ce3 1547 return false;
d25e28ab
JH		 1548}
1549
c9839a11 1550struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1551{
c9839a11 1552 struct smp_ltk *k;
75d262c2 1553
c9839a11
VCG		 1554 list_for_each_entry(k, &hdev->long_term_keys, list) {
1555 if (k->ediv != ediv ||
a8c5fb1a 1556 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1557 continue;
1558
c9839a11 1559 return k;
75d262c2
VCG		 1560 }
1561
1562 return NULL;
1563}
75d262c2 1564
c9839a11 1565struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1566 u8 addr_type)
75d262c2 1567{
c9839a11 1568 struct smp_ltk *k;
75d262c2 1569
c9839a11
VCG		 1570 list_for_each_entry(k, &hdev->long_term_keys, list)
1571 if (addr_type == k->bdaddr_type &&
a8c5fb1a 1572 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1573 return k;
1574
1575 return NULL;
1576}
75d262c2 1577
d25e28ab 1578int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1579 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1580{
1581 struct link_key *key, *old_key;
745c0ce3
VA		 1582 u8 old_key_type;
1583 bool persistent;
55ed8ca1
JH		 1584
1585 old_key = hci_find_link_key(hdev, bdaddr);
1586 if (old_key) {
1587 old_key_type = old_key->type;
1588 key = old_key;
1589 } else {
12adcf3a 1590 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1591 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1592 if (!key)
1593 return -ENOMEM;
1594 list_add(&key->list, &hdev->link_keys);
1595 }
1596
6ed93dc6 1597 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 1598
d25e28ab
JH		 1599 /* Some buggy controller combinations generate a changed
1600 * combination key for legacy pairing even when there's no
1601 * previous key */
1602 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 1603 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 1604 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1605 if (conn)
1606 conn->key_type = type;
1607 }
d25e28ab 1608
55ed8ca1 1609 bacpy(&key->bdaddr, bdaddr);
9b3b4460 1610 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 1611 key->pin_len = pin_len;
1612
b6020ba0 1613 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1614 key->type = old_key_type;
4748fed2
JH		 1615 else
1616 key->type = type;
1617
4df378a1
JH		 1618 if (!new_key)
1619 return 0;
1620
1621 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1622
744cf19e 1623 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1624
6ec5bcad
VA		 1625 if (conn)
1626 conn->flush_key = !persistent;
55ed8ca1
JH		 1627
1628 return 0;
1629}
1630
c9839a11 1631int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1632 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1633 ediv, u8 rand[8])
75d262c2 1634{
c9839a11 1635 struct smp_ltk *key, *old_key;
75d262c2 1636
c9839a11
VCG		 1637 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1638 return 0;
75d262c2 1639
c9839a11
VCG		 1640 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1641 if (old_key)
75d262c2 1642 key = old_key;
c9839a11
VCG		 1643 else {
1644 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1645 if (!key)
1646 return -ENOMEM;
c9839a11 1647 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1648 }
1649
75d262c2 1650 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1651 key->bdaddr_type = addr_type;
1652 memcpy(key->val, tk, sizeof(key->val));
1653 key->authenticated = authenticated;
1654 key->ediv = ediv;
1655 key->enc_size = enc_size;
1656 key->type = type;
1657 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1658
c9839a11
VCG		 1659 if (!new_key)
1660 return 0;
75d262c2 1661
261cc5aa
VCG		 1662 if (type & HCI_SMP_LTK)
1663 mgmt_new_ltk(hdev, key, 1);
1664
75d262c2
VCG		 1665 return 0;
1666}
1667
55ed8ca1
JH		 1668int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1669{
1670 struct link_key *key;
1671
1672 key = hci_find_link_key(hdev, bdaddr);
1673 if (!key)
1674 return -ENOENT;
1675
6ed93dc6 1676 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1
JH		 1677
1678 list_del(&key->list);
1679 kfree(key);
1680
1681 return 0;
1682}
1683
b899efaf
VCG		 1684int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1685{
1686 struct smp_ltk *k, *tmp;
1687
1688 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1689 if (bacmp(bdaddr, &k->bdaddr))
1690 continue;
1691
6ed93dc6 1692 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf
VCG		 1693
1694 list_del(&k->list);
1695 kfree(k);
1696 }
1697
1698 return 0;
1699}
1700
6bd32326 1701/* HCI command timer function */
bda4f23a 1702static void hci_cmd_timeout(unsigned long arg)
6bd32326
VT		 1703{
1704 struct hci_dev *hdev = (void *) arg;
1705
bda4f23a
AE		 1706 if (hdev->sent_cmd) {
1707 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1708 u16 opcode = __le16_to_cpu(sent->opcode);
1709
1710 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1711 } else {
1712 BT_ERR("%s command tx timeout", hdev->name);
1713 }
1714
6bd32326 1715 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1716 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1717}
1718
2763eda6 1719struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1720 bdaddr_t *bdaddr)
2763eda6
SJ		 1721{
1722 struct oob_data *data;
1723
1724 list_for_each_entry(data, &hdev->remote_oob_data, list)
1725 if (bacmp(bdaddr, &data->bdaddr) == 0)
1726 return data;
1727
1728 return NULL;
1729}
1730
1731int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1732{
1733 struct oob_data *data;
1734
1735 data = hci_find_remote_oob_data(hdev, bdaddr);
1736 if (!data)
1737 return -ENOENT;
1738
6ed93dc6 1739 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1740
1741 list_del(&data->list);
1742 kfree(data);
1743
1744 return 0;
1745}
1746
1747int hci_remote_oob_data_clear(struct hci_dev *hdev)
1748{
1749 struct oob_data *data, *n;
1750
1751 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1752 list_del(&data->list);
1753 kfree(data);
1754 }
1755
1756 return 0;
1757}
1758
1759int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1760 u8 *randomizer)
2763eda6
SJ		 1761{
1762 struct oob_data *data;
1763
1764 data = hci_find_remote_oob_data(hdev, bdaddr);
1765
1766 if (!data) {
1767 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1768 if (!data)
1769 return -ENOMEM;
1770
1771 bacpy(&data->bdaddr, bdaddr);
1772 list_add(&data->list, &hdev->remote_oob_data);
1773 }
1774
1775 memcpy(data->hash, hash, sizeof(data->hash));
1776 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1777
6ed93dc6 1778 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 1779
1780 return 0;
1781}
1782
04124681 1783struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1784{
8035ded4 1785 struct bdaddr_list *b;
b2a66aad 1786
8035ded4 1787 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1788 if (bacmp(bdaddr, &b->bdaddr) == 0)
1789 return b;
b2a66aad
AJ		 1790
1791 return NULL;
1792}
1793
1794int hci_blacklist_clear(struct hci_dev *hdev)
1795{
1796 struct list_head *p, *n;
1797
1798 list_for_each_safe(p, n, &hdev->blacklist) {
1799 struct bdaddr_list *b;
1800
1801 b = list_entry(p, struct bdaddr_list, list);
1802
1803 list_del(p);
1804 kfree(b);
1805 }
1806
1807 return 0;
1808}
1809
88c1fe4b 1810int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1811{
1812 struct bdaddr_list *entry;
b2a66aad
AJ		 1813
1814 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1815 return -EBADF;
1816
5e762444
AJ		 1817 if (hci_blacklist_lookup(hdev, bdaddr))
1818 return -EEXIST;
b2a66aad
AJ		 1819
1820 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1821 if (!entry)
1822 return -ENOMEM;
b2a66aad
AJ		 1823
1824 bacpy(&entry->bdaddr, bdaddr);
1825
1826 list_add(&entry->list, &hdev->blacklist);
1827
88c1fe4b 1828 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1829}
1830
88c1fe4b 1831int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1832{
1833 struct bdaddr_list *entry;
b2a66aad 1834
1ec918ce 1835 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1836 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1837
1838 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1839 if (!entry)
5e762444 1840 return -ENOENT;
b2a66aad
AJ		 1841
1842 list_del(&entry->list);
1843 kfree(entry);
1844
88c1fe4b 1845 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1846}
1847
7ba8b4be
AG		 1848static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1849{
1850 struct le_scan_params *param = (struct le_scan_params *) opt;
1851 struct hci_cp_le_set_scan_param cp;
1852
1853 memset(&cp, 0, sizeof(cp));
1854 cp.type = param->type;
1855 cp.interval = cpu_to_le16(param->interval);
1856 cp.window = cpu_to_le16(param->window);
1857
1858 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1859}
1860
1861static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1862{
1863 struct hci_cp_le_set_scan_enable cp;
1864
1865 memset(&cp, 0, sizeof(cp));
1866 cp.enable = 1;
0431a43c 1867 cp.filter_dup = 1;
7ba8b4be
AG		 1868
1869 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1870}
1871
1872static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1873 u16 window, int timeout)
7ba8b4be
AG		 1874{
1875 long timeo = msecs_to_jiffies(3000);
1876 struct le_scan_params param;
1877 int err;
1878
1879 BT_DBG("%s", hdev->name);
1880
1881 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1882 return -EINPROGRESS;
1883
1884 param.type = type;
1885 param.interval = interval;
1886 param.window = window;
1887
1888 hci_req_lock(hdev);
1889
01178cd4
JH		 1890 err = __hci_req_sync(hdev, le_scan_param_req, (unsigned long) &param,
1891 timeo);
7ba8b4be 1892 if (!err)
01178cd4 1893 err = __hci_req_sync(hdev, le_scan_enable_req, 0, timeo);
7ba8b4be
AG		 1894
1895 hci_req_unlock(hdev);
1896
1897 if (err < 0)
1898 return err;
1899
46818ed5
JH		 1900 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
1901 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1902
1903 return 0;
1904}
1905
7dbfac1d
AG		 1906int hci_cancel_le_scan(struct hci_dev *hdev)
1907{
1908 BT_DBG("%s", hdev->name);
1909
1910 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1911 return -EALREADY;
1912
1913 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1914 struct hci_cp_le_set_scan_enable cp;
1915
1916 /* Send HCI command to disable LE Scan */
1917 memset(&cp, 0, sizeof(cp));
1918 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1919 }
1920
1921 return 0;
1922}
1923
7ba8b4be
AG		 1924static void le_scan_disable_work(struct work_struct *work)
1925{
1926 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1927 le_scan_disable.work);
7ba8b4be
AG		 1928 struct hci_cp_le_set_scan_enable cp;
1929
1930 BT_DBG("%s", hdev->name);
1931
1932 memset(&cp, 0, sizeof(cp));
1933
1934 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1935}
1936
28b75a89
AG		 1937static void le_scan_work(struct work_struct *work)
1938{
1939 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1940 struct le_scan_params *param = &hdev->le_scan_params;
1941
1942 BT_DBG("%s", hdev->name);
1943
04124681
GP		 1944 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1945 param->timeout);
28b75a89
AG		 1946}
1947
1948int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1949 int timeout)
28b75a89
AG		 1950{
1951 struct le_scan_params *param = &hdev->le_scan_params;
1952
1953 BT_DBG("%s", hdev->name);
1954
f1550478
JH		 1955 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1956 return -ENOTSUPP;
1957
28b75a89
AG		 1958 if (work_busy(&hdev->le_scan))
1959 return -EINPROGRESS;
1960
1961 param->type = type;
1962 param->interval = interval;
1963 param->window = window;
1964 param->timeout = timeout;
1965
1966 queue_work(system_long_wq, &hdev->le_scan);
1967
1968 return 0;
1969}
1970
9be0dab7
DH		 1971/* Alloc HCI device */
1972struct hci_dev *hci_alloc_dev(void)
1973{
1974 struct hci_dev *hdev;
1975
1976 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1977 if (!hdev)
1978 return NULL;
1979
b1b813d4
DH		 1980 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1981 hdev->esco_type = (ESCO_HV1);
1982 hdev->link_mode = (HCI_LM_ACCEPT);
1983 hdev->io_capability = 0x03; /* No Input No Output */
bbaf444a
JH		 1984 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
1985 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
b1b813d4 1986
b1b813d4
DH		 1987 hdev->sniff_max_interval = 800;
1988 hdev->sniff_min_interval = 80;
1989
1990 mutex_init(&hdev->lock);
1991 mutex_init(&hdev->req_lock);
1992
1993 INIT_LIST_HEAD(&hdev->mgmt_pending);
1994 INIT_LIST_HEAD(&hdev->blacklist);
1995 INIT_LIST_HEAD(&hdev->uuids);
1996 INIT_LIST_HEAD(&hdev->link_keys);
1997 INIT_LIST_HEAD(&hdev->long_term_keys);
1998 INIT_LIST_HEAD(&hdev->remote_oob_data);
6b536b5e 1999 INIT_LIST_HEAD(&hdev->conn_hash.list);
b1b813d4
DH		 2000
2001 INIT_WORK(&hdev->rx_work, hci_rx_work);
2002 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2003 INIT_WORK(&hdev->tx_work, hci_tx_work);
2004 INIT_WORK(&hdev->power_on, hci_power_on);
2005 INIT_WORK(&hdev->le_scan, le_scan_work);
2006
b1b813d4
DH		 2007 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2008 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2009 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2010
9be0dab7 2011 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 2012 skb_queue_head_init(&hdev->rx_q);
2013 skb_queue_head_init(&hdev->cmd_q);
2014 skb_queue_head_init(&hdev->raw_q);
2015
2016 init_waitqueue_head(&hdev->req_wait_q);
2017
bda4f23a 2018 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
b1b813d4 2019
b1b813d4
DH		 2020 hci_init_sysfs(hdev);
2021 discovery_init(hdev);
9be0dab7
DH		 2022
2023 return hdev;
2024}
2025EXPORT_SYMBOL(hci_alloc_dev);
2026
2027/* Free HCI device */
2028void hci_free_dev(struct hci_dev *hdev)
2029{
2030 skb_queue_purge(&hdev->driver_init);
2031
2032 /* will free via device release */
2033 put_device(&hdev->dev);
2034}
2035EXPORT_SYMBOL(hci_free_dev);
2036
1da177e4
LT		 2037/* Register HCI device */
2038int hci_register_dev(struct hci_dev *hdev)
2039{
b1b813d4 2040 int id, error;
1da177e4 2041
010666a1 2042 if (!hdev->open || !hdev->close)
1da177e4
LT		 2043 return -EINVAL;
2044
08add513
MM		 2045 /* Do not allow HCI_AMP devices to register at index 0,
2046 * so the index can be used as the AMP controller ID.
2047 */
3df92b31
SL		 2048 switch (hdev->dev_type) {
2049 case HCI_BREDR:
2050 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2051 break;
2052 case HCI_AMP:
2053 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2054 break;
2055 default:
2056 return -EINVAL;
1da177e4 2057 }
8e87d142 2058
3df92b31
SL		 2059 if (id < 0)
2060 return id;
2061
1da177e4
LT		 2062 sprintf(hdev->name, "hci%d", id);
2063 hdev->id = id;
2d8b3a11
AE		 2064
2065 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2066
3df92b31
SL		 2067 write_lock(&hci_dev_list_lock);
2068 list_add(&hdev->list, &hci_dev_list);
f20d09d5 2069 write_unlock(&hci_dev_list_lock);
1da177e4 2070
32845eb1 2071 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
a8c5fb1a 2072 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 2073 if (!hdev->workqueue) {
2074 error = -ENOMEM;
2075 goto err;
2076 }
f48fd9c8 2077
6ead1bbc
JH		 2078 hdev->req_workqueue = alloc_workqueue(hdev->name,
2079 WQ_HIGHPRI | WQ_UNBOUND |
2080 WQ_MEM_RECLAIM, 1);
2081 if (!hdev->req_workqueue) {
2082 destroy_workqueue(hdev->workqueue);
2083 error = -ENOMEM;
2084 goto err;
2085 }
2086
33ca954d
DH		 2087 error = hci_add_sysfs(hdev);
2088 if (error < 0)
2089 goto err_wqueue;
1da177e4 2090
611b30f7 2091 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 2092 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2093 hdev);
611b30f7
MH		 2094 if (hdev->rfkill) {
2095 if (rfkill_register(hdev->rfkill) < 0) {
2096 rfkill_destroy(hdev->rfkill);
2097 hdev->rfkill = NULL;
2098 }
2099 }
2100
a8b2d5c2 2101 set_bit(HCI_SETUP, &hdev->dev_flags);
ce2be9ac
AE		 2102
2103 if (hdev->dev_type != HCI_AMP)
2104 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2105
1da177e4 2106 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 2107 hci_dev_hold(hdev);
1da177e4 2108
19202573 2109 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 2110
1da177e4 2111 return id;
f48fd9c8 2112
33ca954d
DH		 2113err_wqueue:
2114 destroy_workqueue(hdev->workqueue);
6ead1bbc 2115 destroy_workqueue(hdev->req_workqueue);
33ca954d 2116err:
3df92b31 2117 ida_simple_remove(&hci_index_ida, hdev->id);
f20d09d5 2118 write_lock(&hci_dev_list_lock);
f48fd9c8 2119 list_del(&hdev->list);
f20d09d5 2120 write_unlock(&hci_dev_list_lock);
f48fd9c8 2121
33ca954d 2122 return error;
1da177e4
LT		 2123}
2124EXPORT_SYMBOL(hci_register_dev);
2125
2126/* Unregister HCI device */
59735631 2127void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 2128{
3df92b31 2129 int i, id;
ef222013 2130
c13854ce 2131 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 2132
94324962
JH		 2133 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2134
3df92b31
SL		 2135 id = hdev->id;
2136
f20d09d5 2137 write_lock(&hci_dev_list_lock);
1da177e4 2138 list_del(&hdev->list);
f20d09d5 2139 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 2140
2141 hci_dev_do_close(hdev);
2142
cd4c5391 2143 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 2144 kfree_skb(hdev->reassembly[i]);
2145
b9b5ef18
GP		 2146 cancel_work_sync(&hdev->power_on);
2147
ab81cbf9 2148 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8c5fb1a 2149 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 2150 hci_dev_lock(hdev);
744cf19e 2151 mgmt_index_removed(hdev);
09fd0de5 2152 hci_dev_unlock(hdev);
56e5cb86 2153 }
ab81cbf9 2154
2e58ef3e
JH		 2155 /* mgmt_index_removed should take care of emptying the
2156 * pending list */
2157 BUG_ON(!list_empty(&hdev->mgmt_pending));
2158
1da177e4
LT		 2159 hci_notify(hdev, HCI_DEV_UNREG);
2160
611b30f7
MH		 2161 if (hdev->rfkill) {
2162 rfkill_unregister(hdev->rfkill);
2163 rfkill_destroy(hdev->rfkill);
2164 }
2165
ce242970 2166 hci_del_sysfs(hdev);
147e2d59 2167
f48fd9c8 2168 destroy_workqueue(hdev->workqueue);
6ead1bbc 2169 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 2170
09fd0de5 2171 hci_dev_lock(hdev);
e2e0cacb 2172 hci_blacklist_clear(hdev);
2aeb9a1a 2173 hci_uuids_clear(hdev);
55ed8ca1 2174 hci_link_keys_clear(hdev);
b899efaf 2175 hci_smp_ltks_clear(hdev);
2763eda6 2176 hci_remote_oob_data_clear(hdev);
09fd0de5 2177 hci_dev_unlock(hdev);
e2e0cacb 2178
dc946bd8 2179 hci_dev_put(hdev);
3df92b31
SL		 2180
2181 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 2182}
2183EXPORT_SYMBOL(hci_unregister_dev);
2184
2185/* Suspend HCI device */
2186int hci_suspend_dev(struct hci_dev *hdev)
2187{
2188 hci_notify(hdev, HCI_DEV_SUSPEND);
2189 return 0;
2190}
2191EXPORT_SYMBOL(hci_suspend_dev);
2192
2193/* Resume HCI device */
2194int hci_resume_dev(struct hci_dev *hdev)
2195{
2196 hci_notify(hdev, HCI_DEV_RESUME);
2197 return 0;
2198}
2199EXPORT_SYMBOL(hci_resume_dev);
2200
76bca880
MH		 2201/* Receive frame from HCI drivers */
2202int hci_recv_frame(struct sk_buff *skb)
2203{
2204 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2205 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 2206 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 2207 kfree_skb(skb);
2208 return -ENXIO;
2209 }
2210
d82603c6 2211 /* Incoming skb */
76bca880
MH		 2212 bt_cb(skb)->incoming = 1;
2213
2214 /* Time stamp */
2215 __net_timestamp(skb);
2216
76bca880 2217 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 2218 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 2219
76bca880
MH		 2220 return 0;
2221}
2222EXPORT_SYMBOL(hci_recv_frame);
2223
33e882a5 2224static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
a8c5fb1a 2225 int count, __u8 index)
33e882a5
SS		 2226{
2227 int len = 0;
2228 int hlen = 0;
2229 int remain = count;
2230 struct sk_buff *skb;
2231 struct bt_skb_cb *scb;
2232
2233 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
a8c5fb1a 2234 index >= NUM_REASSEMBLY)
33e882a5
SS		 2235 return -EILSEQ;
2236
2237 skb = hdev->reassembly[index];
2238
2239 if (!skb) {
2240 switch (type) {
2241 case HCI_ACLDATA_PKT:
2242 len = HCI_MAX_FRAME_SIZE;
2243 hlen = HCI_ACL_HDR_SIZE;
2244 break;
2245 case HCI_EVENT_PKT:
2246 len = HCI_MAX_EVENT_SIZE;
2247 hlen = HCI_EVENT_HDR_SIZE;
2248 break;
2249 case HCI_SCODATA_PKT:
2250 len = HCI_MAX_SCO_SIZE;
2251 hlen = HCI_SCO_HDR_SIZE;
2252 break;
2253 }
2254
1e429f38 2255 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 2256 if (!skb)
2257 return -ENOMEM;
2258
2259 scb = (void *) skb->cb;
2260 scb->expect = hlen;
2261 scb->pkt_type = type;
2262
2263 skb->dev = (void *) hdev;
2264 hdev->reassembly[index] = skb;
2265 }
2266
2267 while (count) {
2268 scb = (void *) skb->cb;
89bb46d0 2269 len = min_t(uint, scb->expect, count);
33e882a5
SS		 2270
2271 memcpy(skb_put(skb, len), data, len);
2272
2273 count -= len;
2274 data += len;
2275 scb->expect -= len;
2276 remain = count;
2277
2278 switch (type) {
2279 case HCI_EVENT_PKT:
2280 if (skb->len == HCI_EVENT_HDR_SIZE) {
2281 struct hci_event_hdr *h = hci_event_hdr(skb);
2282 scb->expect = h->plen;
2283
2284 if (skb_tailroom(skb) < scb->expect) {
2285 kfree_skb(skb);
2286 hdev->reassembly[index] = NULL;
2287 return -ENOMEM;
2288 }
2289 }
2290 break;
2291
2292 case HCI_ACLDATA_PKT:
2293 if (skb->len == HCI_ACL_HDR_SIZE) {
2294 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2295 scb->expect = __le16_to_cpu(h->dlen);
2296
2297 if (skb_tailroom(skb) < scb->expect) {
2298 kfree_skb(skb);
2299 hdev->reassembly[index] = NULL;
2300 return -ENOMEM;
2301 }
2302 }
2303 break;
2304
2305 case HCI_SCODATA_PKT:
2306 if (skb->len == HCI_SCO_HDR_SIZE) {
2307 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2308 scb->expect = h->dlen;
2309
2310 if (skb_tailroom(skb) < scb->expect) {
2311 kfree_skb(skb);
2312 hdev->reassembly[index] = NULL;
2313 return -ENOMEM;
2314 }
2315 }
2316 break;
2317 }
2318
2319 if (scb->expect == 0) {
2320 /* Complete frame */
2321
2322 bt_cb(skb)->pkt_type = type;
2323 hci_recv_frame(skb);
2324
2325 hdev->reassembly[index] = NULL;
2326 return remain;
2327 }
2328 }
2329
2330 return remain;
2331}
2332
ef222013
MH		 2333int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2334{
f39a3c06
SS		 2335 int rem = 0;
2336
ef222013
MH		 2337 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2338 return -EILSEQ;
2339
da5f6c37 2340 while (count) {
1e429f38 2341 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2342 if (rem < 0)
2343 return rem;
ef222013 2344
f39a3c06
SS		 2345 data += (count - rem);
2346 count = rem;
f81c6224 2347 }
ef222013 2348
f39a3c06 2349 return rem;
ef222013
MH		 2350}
2351EXPORT_SYMBOL(hci_recv_fragment);
2352
99811510
SS		 2353#define STREAM_REASSEMBLY 0
2354
2355int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2356{
2357 int type;
2358 int rem = 0;
2359
da5f6c37 2360 while (count) {
99811510
SS		 2361 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2362
2363 if (!skb) {
2364 struct { char type; } *pkt;
2365
2366 /* Start of the frame */
2367 pkt = data;
2368 type = pkt->type;
2369
2370 data++;
2371 count--;
2372 } else
2373 type = bt_cb(skb)->pkt_type;
2374
1e429f38 2375 rem = hci_reassembly(hdev, type, data, count,
a8c5fb1a 2376 STREAM_REASSEMBLY);
99811510
SS		 2377 if (rem < 0)
2378 return rem;
2379
2380 data += (count - rem);
2381 count = rem;
f81c6224 2382 }
99811510
SS		 2383
2384 return rem;
2385}
2386EXPORT_SYMBOL(hci_recv_stream_fragment);
2387
1da177e4
LT		 2388/* ---- Interface to upper protocols ---- */
2389
1da177e4
LT		 2390int hci_register_cb(struct hci_cb *cb)
2391{
2392 BT_DBG("%p name %s", cb, cb->name);
2393
f20d09d5 2394 write_lock(&hci_cb_list_lock);
1da177e4 2395 list_add(&cb->list, &hci_cb_list);
f20d09d5 2396 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2397
2398 return 0;
2399}
2400EXPORT_SYMBOL(hci_register_cb);
2401
2402int hci_unregister_cb(struct hci_cb *cb)
2403{
2404 BT_DBG("%p name %s", cb, cb->name);
2405
f20d09d5 2406 write_lock(&hci_cb_list_lock);
1da177e4 2407 list_del(&cb->list);
f20d09d5 2408 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2409
2410 return 0;
2411}
2412EXPORT_SYMBOL(hci_unregister_cb);
2413
2414static int hci_send_frame(struct sk_buff *skb)
2415{
2416 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2417
2418 if (!hdev) {
2419 kfree_skb(skb);
2420 return -ENODEV;
2421 }
2422
0d48d939 2423 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2424
cd82e61c
MH		 2425 /* Time stamp */
2426 __net_timestamp(skb);
1da177e4 2427
cd82e61c
MH		 2428 /* Send copy to monitor */
2429 hci_send_to_monitor(hdev, skb);
2430
2431 if (atomic_read(&hdev->promisc)) {
2432 /* Send copy to the sockets */
470fe1b5 2433 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2434 }
2435
2436 /* Get rid of skb owner, prior to sending to the driver. */
2437 skb_orphan(skb);
2438
2439 return hdev->send(skb);
2440}
2441
3119ae95
JH		 2442void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2443{
2444 skb_queue_head_init(&req->cmd_q);
2445 req->hdev = hdev;
2446}
2447
2448int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2449{
2450 struct hci_dev *hdev = req->hdev;
2451 struct sk_buff *skb;
2452 unsigned long flags;
2453
2454 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2455
2456 /* Do not allow empty requests */
2457 if (skb_queue_empty(&req->cmd_q))
2458 return -EINVAL;
2459
2460 skb = skb_peek_tail(&req->cmd_q);
2461 bt_cb(skb)->req.complete = complete;
2462
2463 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2464 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2465 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2466
2467 queue_work(hdev->workqueue, &hdev->cmd_work);
2468
2469 return 0;
2470}
2471
1ca3a9d0
JH		 2472static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
2473 u32 plen, void *param)
1da177e4
LT		 2474{
2475 int len = HCI_COMMAND_HDR_SIZE + plen;
2476 struct hci_command_hdr *hdr;
2477 struct sk_buff *skb;
2478
1da177e4 2479 skb = bt_skb_alloc(len, GFP_ATOMIC);
1ca3a9d0
JH		 2480 if (!skb)
2481 return NULL;
1da177e4
LT		 2482
2483 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2484 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2485 hdr->plen = plen;
2486
2487 if (plen)
2488 memcpy(skb_put(skb, plen), param, plen);
2489
2490 BT_DBG("skb len %d", skb->len);
2491
0d48d939 2492 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2493 skb->dev = (void *) hdev;
c78ae283 2494
1ca3a9d0
JH		 2495 return skb;
2496}
2497
2498/* Send HCI command */
2499int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2500{
2501 struct sk_buff *skb;
2502
2503 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2504
2505 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2506 if (!skb) {
2507 BT_ERR("%s no memory for command", hdev->name);
2508 return -ENOMEM;
2509 }
2510
a5040efa
JH		 2511 if (test_bit(HCI_INIT, &hdev->flags))
2512 hdev->init_last_cmd = opcode;
2513
1da177e4 2514 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2515 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2516
2517 return 0;
2518}
1da177e4
LT		 2519
2520/* Get data from the previously sent command */
a9de9248 2521void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2522{
2523 struct hci_command_hdr *hdr;
2524
2525 if (!hdev->sent_cmd)
2526 return NULL;
2527
2528 hdr = (void *) hdev->sent_cmd->data;
2529
a9de9248 2530 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2531 return NULL;
2532
f0e09510 2533 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 2534
2535 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2536}
2537
2538/* Send ACL data */
2539static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2540{
2541 struct hci_acl_hdr *hdr;
2542 int len = skb->len;
2543
badff6d0
ACM		 2544 skb_push(skb, HCI_ACL_HDR_SIZE);
2545 skb_reset_transport_header(skb);
9c70220b 2546 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2547 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2548 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2549}
2550
ee22be7e 2551static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 2552 struct sk_buff *skb, __u16 flags)
1da177e4 2553{
ee22be7e 2554 struct hci_conn *conn = chan->conn;
1da177e4
LT		 2555 struct hci_dev *hdev = conn->hdev;
2556 struct sk_buff *list;
2557
087bfd99
GP		 2558 skb->len = skb_headlen(skb);
2559 skb->data_len = 0;
2560
2561 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
204a6e54
AE		 2562
2563 switch (hdev->dev_type) {
2564 case HCI_BREDR:
2565 hci_add_acl_hdr(skb, conn->handle, flags);
2566 break;
2567 case HCI_AMP:
2568 hci_add_acl_hdr(skb, chan->handle, flags);
2569 break;
2570 default:
2571 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2572 return;
2573 }
087bfd99 2574
70f23020
AE		 2575 list = skb_shinfo(skb)->frag_list;
2576 if (!list) {
1da177e4
LT		 2577 /* Non fragmented */
2578 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2579
73d80deb 2580 skb_queue_tail(queue, skb);
1da177e4
LT		 2581 } else {
2582 /* Fragmented */
2583 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2584
2585 skb_shinfo(skb)->frag_list = NULL;
2586
2587 /* Queue all fragments atomically */
af3e6359 2588 spin_lock(&queue->lock);
1da177e4 2589
73d80deb 2590 __skb_queue_tail(queue, skb);
e702112f
AE		 2591
2592 flags &= ~ACL_START;
2593 flags |= ACL_CONT;
1da177e4
LT		 2594 do {
2595 skb = list; list = list->next;
8e87d142 2596
1da177e4 2597 skb->dev = (void *) hdev;
0d48d939 2598 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2599 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2600
2601 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2602
73d80deb 2603 __skb_queue_tail(queue, skb);
1da177e4
LT		 2604 } while (list);
2605
af3e6359 2606 spin_unlock(&queue->lock);
1da177e4 2607 }
73d80deb
LAD		 2608}
2609
2610void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2611{
ee22be7e 2612 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 2613
f0e09510 2614 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb
LAD		 2615
2616 skb->dev = (void *) hdev;
73d80deb 2617
ee22be7e 2618 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 2619
3eff45ea 2620 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2621}
1da177e4
LT		 2622
2623/* Send SCO data */
0d861d8b 2624void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2625{
2626 struct hci_dev *hdev = conn->hdev;
2627 struct hci_sco_hdr hdr;
2628
2629 BT_DBG("%s len %d", hdev->name, skb->len);
2630
aca3192c 2631 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2632 hdr.dlen = skb->len;
2633
badff6d0
ACM		 2634 skb_push(skb, HCI_SCO_HDR_SIZE);
2635 skb_reset_transport_header(skb);
9c70220b 2636 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2637
2638 skb->dev = (void *) hdev;
0d48d939 2639 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2640
1da177e4 2641 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2642 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 2643}
1da177e4
LT		 2644
2645/* ---- HCI TX task (outgoing data) ---- */
2646
2647/* HCI Connection scheduler */
6039aa73
GP		 2648static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2649 int *quote)
1da177e4
LT		 2650{
2651 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2652 struct hci_conn *conn = NULL, *c;
abc5de8f 2653 unsigned int num = 0, min = ~0;
1da177e4 2654
8e87d142 2655 /* We don't have to lock device here. Connections are always
1da177e4 2656 * added and removed with TX task disabled. */
bf4c6325
GP		 2657
2658 rcu_read_lock();
2659
2660 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2661 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2662 continue;
769be974
MH		 2663
2664 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2665 continue;
2666
1da177e4
LT		 2667 num++;
2668
2669 if (c->sent < min) {
2670 min = c->sent;
2671 conn = c;
2672 }
52087a79
LAD		 2673
2674 if (hci_conn_num(hdev, type) == num)
2675 break;
1da177e4
LT		 2676 }
2677
bf4c6325
GP		 2678 rcu_read_unlock();
2679
1da177e4 2680 if (conn) {
6ed58ec5
VT		 2681 int cnt, q;
2682
2683 switch (conn->type) {
2684 case ACL_LINK:
2685 cnt = hdev->acl_cnt;
2686 break;
2687 case SCO_LINK:
2688 case ESCO_LINK:
2689 cnt = hdev->sco_cnt;
2690 break;
2691 case LE_LINK:
2692 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2693 break;
2694 default:
2695 cnt = 0;
2696 BT_ERR("Unknown link type");
2697 }
2698
2699 q = cnt / num;
1da177e4
LT		 2700 *quote = q ? q : 1;
2701 } else
2702 *quote = 0;
2703
2704 BT_DBG("conn %p quote %d", conn, *quote);
2705 return conn;
2706}
2707
6039aa73 2708static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2709{
2710 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2711 struct hci_conn *c;
1da177e4 2712
bae1f5d9 2713 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2714
bf4c6325
GP		 2715 rcu_read_lock();
2716
1da177e4 2717 /* Kill stalled connections */
bf4c6325 2718 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 2719 if (c->type == type && c->sent) {
6ed93dc6
AE		 2720 BT_ERR("%s killing stalled connection %pMR",
2721 hdev->name, &c->dst);
bed71748 2722 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 2723 }
2724 }
bf4c6325
GP		 2725
2726 rcu_read_unlock();
1da177e4
LT		 2727}
2728
6039aa73
GP		 2729static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2730 int *quote)
1da177e4 2731{
73d80deb
LAD		 2732 struct hci_conn_hash *h = &hdev->conn_hash;
2733 struct hci_chan *chan = NULL;
abc5de8f 2734 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2735 struct hci_conn *conn;
73d80deb
LAD		 2736 int cnt, q, conn_num = 0;
2737
2738 BT_DBG("%s", hdev->name);
2739
bf4c6325
GP		 2740 rcu_read_lock();
2741
2742 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2743 struct hci_chan *tmp;
2744
2745 if (conn->type != type)
2746 continue;
2747
2748 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2749 continue;
2750
2751 conn_num++;
2752
8192edef 2753 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2754 struct sk_buff *skb;
2755
2756 if (skb_queue_empty(&tmp->data_q))
2757 continue;
2758
2759 skb = skb_peek(&tmp->data_q);
2760 if (skb->priority < cur_prio)
2761 continue;
2762
2763 if (skb->priority > cur_prio) {
2764 num = 0;
2765 min = ~0;
2766 cur_prio = skb->priority;
2767 }
2768
2769 num++;
2770
2771 if (conn->sent < min) {
2772 min = conn->sent;
2773 chan = tmp;
2774 }
2775 }
2776
2777 if (hci_conn_num(hdev, type) == conn_num)
2778 break;
2779 }
2780
bf4c6325
GP		 2781 rcu_read_unlock();
2782
73d80deb
LAD		 2783 if (!chan)
2784 return NULL;
2785
2786 switch (chan->conn->type) {
2787 case ACL_LINK:
2788 cnt = hdev->acl_cnt;
2789 break;
bd1eb66b
AE		 2790 case AMP_LINK:
2791 cnt = hdev->block_cnt;
2792 break;
73d80deb
LAD		 2793 case SCO_LINK:
2794 case ESCO_LINK:
2795 cnt = hdev->sco_cnt;
2796 break;
2797 case LE_LINK:
2798 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2799 break;
2800 default:
2801 cnt = 0;
2802 BT_ERR("Unknown link type");
2803 }
2804
2805 q = cnt / num;
2806 *quote = q ? q : 1;
2807 BT_DBG("chan %p quote %d", chan, *quote);
2808 return chan;
2809}
2810
02b20f0b
LAD		 2811static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2812{
2813 struct hci_conn_hash *h = &hdev->conn_hash;
2814 struct hci_conn *conn;
2815 int num = 0;
2816
2817 BT_DBG("%s", hdev->name);
2818
bf4c6325
GP		 2819 rcu_read_lock();
2820
2821 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2822 struct hci_chan *chan;
2823
2824 if (conn->type != type)
2825 continue;
2826
2827 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2828 continue;
2829
2830 num++;
2831
8192edef 2832 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2833 struct sk_buff *skb;
2834
2835 if (chan->sent) {
2836 chan->sent = 0;
2837 continue;
2838 }
2839
2840 if (skb_queue_empty(&chan->data_q))
2841 continue;
2842
2843 skb = skb_peek(&chan->data_q);
2844 if (skb->priority >= HCI_PRIO_MAX - 1)
2845 continue;
2846
2847 skb->priority = HCI_PRIO_MAX - 1;
2848
2849 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 2850 skb->priority);
02b20f0b
LAD		 2851 }
2852
2853 if (hci_conn_num(hdev, type) == num)
2854 break;
2855 }
bf4c6325
GP		 2856
2857 rcu_read_unlock();
2858
02b20f0b
LAD		 2859}
2860
b71d385a
AE		 2861static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2862{
2863 /* Calculate count of blocks used by this packet */
2864 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2865}
2866
6039aa73 2867static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2868{
1da177e4
LT		 2869 if (!test_bit(HCI_RAW, &hdev->flags)) {
2870 /* ACL tx timeout must be longer than maximum
2871 * link supervision timeout (40.9 seconds) */
63d2bc1b 2872 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 2873 HCI_ACL_TX_TIMEOUT))
bae1f5d9 2874 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2875 }
63d2bc1b 2876}
1da177e4 2877
6039aa73 2878static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 2879{
2880 unsigned int cnt = hdev->acl_cnt;
2881 struct hci_chan *chan;
2882 struct sk_buff *skb;
2883 int quote;
2884
2885 __check_timeout(hdev, cnt);
04837f64 2886
73d80deb 2887 while (hdev->acl_cnt &&
a8c5fb1a 2888 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2889 u32 priority = (skb_peek(&chan->data_q))->priority;
2890 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 2891 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2892 skb->len, skb->priority);
73d80deb 2893
ec1cce24
LAD		 2894 /* Stop if priority has changed */
2895 if (skb->priority < priority)
2896 break;
2897
2898 skb = skb_dequeue(&chan->data_q);
2899
73d80deb 2900 hci_conn_enter_active_mode(chan->conn,
04124681 2901 bt_cb(skb)->force_active);
04837f64 2902
1da177e4
LT		 2903 hci_send_frame(skb);
2904 hdev->acl_last_tx = jiffies;
2905
2906 hdev->acl_cnt--;
73d80deb
LAD		 2907 chan->sent++;
2908 chan->conn->sent++;
1da177e4
LT		 2909 }
2910 }
02b20f0b
LAD		 2911
2912 if (cnt != hdev->acl_cnt)
2913 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2914}
2915
6039aa73 2916static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 2917{
63d2bc1b 2918 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2919 struct hci_chan *chan;
2920 struct sk_buff *skb;
2921 int quote;
bd1eb66b 2922 u8 type;
b71d385a 2923
63d2bc1b 2924 __check_timeout(hdev, cnt);
b71d385a 2925
bd1eb66b
AE		 2926 BT_DBG("%s", hdev->name);
2927
2928 if (hdev->dev_type == HCI_AMP)
2929 type = AMP_LINK;
2930 else
2931 type = ACL_LINK;
2932
b71d385a 2933 while (hdev->block_cnt > 0 &&
bd1eb66b 2934 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 2935 u32 priority = (skb_peek(&chan->data_q))->priority;
2936 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2937 int blocks;
2938
2939 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 2940 skb->len, skb->priority);
b71d385a
AE		 2941
2942 /* Stop if priority has changed */
2943 if (skb->priority < priority)
2944 break;
2945
2946 skb = skb_dequeue(&chan->data_q);
2947
2948 blocks = __get_blocks(hdev, skb);
2949 if (blocks > hdev->block_cnt)
2950 return;
2951
2952 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 2953 bt_cb(skb)->force_active);
b71d385a
AE		 2954
2955 hci_send_frame(skb);
2956 hdev->acl_last_tx = jiffies;
2957
2958 hdev->block_cnt -= blocks;
2959 quote -= blocks;
2960
2961 chan->sent += blocks;
2962 chan->conn->sent += blocks;
2963 }
2964 }
2965
2966 if (cnt != hdev->block_cnt)
bd1eb66b 2967 hci_prio_recalculate(hdev, type);
b71d385a
AE		 2968}
2969
6039aa73 2970static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 2971{
2972 BT_DBG("%s", hdev->name);
2973
bd1eb66b
AE		 2974 /* No ACL link over BR/EDR controller */
2975 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
2976 return;
2977
2978 /* No AMP link over AMP controller */
2979 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 2980 return;
2981
2982 switch (hdev->flow_ctl_mode) {
2983 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2984 hci_sched_acl_pkt(hdev);
2985 break;
2986
2987 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2988 hci_sched_acl_blk(hdev);
2989 break;
2990 }
2991}
2992
1da177e4 2993/* Schedule SCO */
6039aa73 2994static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 2995{
2996 struct hci_conn *conn;
2997 struct sk_buff *skb;
2998 int quote;
2999
3000 BT_DBG("%s", hdev->name);
3001
52087a79
LAD		 3002 if (!hci_conn_num(hdev, SCO_LINK))
3003 return;
3004
1da177e4
LT		 3005 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3006 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3007 BT_DBG("skb %p len %d", skb, skb->len);
3008 hci_send_frame(skb);
3009
3010 conn->sent++;
3011 if (conn->sent == ~0)
3012 conn->sent = 0;
3013 }
3014 }
3015}
3016
6039aa73 3017static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3018{
3019 struct hci_conn *conn;
3020 struct sk_buff *skb;
3021 int quote;
3022
3023 BT_DBG("%s", hdev->name);
3024
52087a79
LAD		 3025 if (!hci_conn_num(hdev, ESCO_LINK))
3026 return;
3027
8fc9ced3
GP		 3028 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3029 &quote))) {
b6a0dc82
MH		 3030 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3031 BT_DBG("skb %p len %d", skb, skb->len);
3032 hci_send_frame(skb);
3033
3034 conn->sent++;
3035 if (conn->sent == ~0)
3036 conn->sent = 0;
3037 }
3038 }
3039}
3040
6039aa73 3041static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3042{
73d80deb 3043 struct hci_chan *chan;
6ed58ec5 3044 struct sk_buff *skb;
02b20f0b 3045 int quote, cnt, tmp;
6ed58ec5
VT		 3046
3047 BT_DBG("%s", hdev->name);
3048
52087a79
LAD		 3049 if (!hci_conn_num(hdev, LE_LINK))
3050 return;
3051
6ed58ec5
VT		 3052 if (!test_bit(HCI_RAW, &hdev->flags)) {
3053 /* LE tx timeout must be longer than maximum
3054 * link supervision timeout (40.9 seconds) */
bae1f5d9 3055 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3056 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3057 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3058 }
3059
3060 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3061 tmp = cnt;
73d80deb 3062 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3063 u32 priority = (skb_peek(&chan->data_q))->priority;
3064 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3065 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3066 skb->len, skb->priority);
6ed58ec5 3067
ec1cce24
LAD		 3068 /* Stop if priority has changed */
3069 if (skb->priority < priority)
3070 break;
3071
3072 skb = skb_dequeue(&chan->data_q);
3073
6ed58ec5
VT		 3074 hci_send_frame(skb);
3075 hdev->le_last_tx = jiffies;
3076
3077 cnt--;
73d80deb
LAD		 3078 chan->sent++;
3079 chan->conn->sent++;
6ed58ec5
VT		 3080 }
3081 }
73d80deb 3082
6ed58ec5
VT		 3083 if (hdev->le_pkts)
3084 hdev->le_cnt = cnt;
3085 else
3086 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3087
3088 if (cnt != tmp)
3089 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3090}
3091
3eff45ea 3092static void hci_tx_work(struct work_struct *work)
1da177e4 3093{
3eff45ea 3094 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3095 struct sk_buff *skb;
3096
6ed58ec5 3097 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3098 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 3099
3100 /* Schedule queues and send stuff to HCI driver */
3101
3102 hci_sched_acl(hdev);
3103
3104 hci_sched_sco(hdev);
3105
b6a0dc82
MH		 3106 hci_sched_esco(hdev);
3107
6ed58ec5
VT		 3108 hci_sched_le(hdev);
3109
1da177e4
LT		 3110 /* Send next queued raw (unknown type) packet */
3111 while ((skb = skb_dequeue(&hdev->raw_q)))
3112 hci_send_frame(skb);
1da177e4
LT		 3113}
3114
25985edc 3115/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3116
3117/* ACL data packet */
6039aa73 3118static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3119{
3120 struct hci_acl_hdr *hdr = (void *) skb->data;
3121 struct hci_conn *conn;
3122 __u16 handle, flags;
3123
3124 skb_pull(skb, HCI_ACL_HDR_SIZE);
3125
3126 handle = __le16_to_cpu(hdr->handle);
3127 flags = hci_flags(handle);
3128 handle = hci_handle(handle);
3129
f0e09510 3130 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 3131 handle, flags);
1da177e4
LT		 3132
3133 hdev->stat.acl_rx++;
3134
3135 hci_dev_lock(hdev);
3136 conn = hci_conn_hash_lookup_handle(hdev, handle);
3137 hci_dev_unlock(hdev);
8e87d142 3138
1da177e4 3139 if (conn) {
65983fc7 3140 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 3141
1da177e4 3142 /* Send to upper protocol */
686ebf28
UF		 3143 l2cap_recv_acldata(conn, skb, flags);
3144 return;
1da177e4 3145 } else {
8e87d142 3146 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 3147 hdev->name, handle);
1da177e4
LT		 3148 }
3149
3150 kfree_skb(skb);
3151}
3152
3153/* SCO data packet */
6039aa73 3154static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3155{
3156 struct hci_sco_hdr *hdr = (void *) skb->data;
3157 struct hci_conn *conn;
3158 __u16 handle;
3159
3160 skb_pull(skb, HCI_SCO_HDR_SIZE);
3161
3162 handle = __le16_to_cpu(hdr->handle);
3163
f0e09510 3164 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 3165
3166 hdev->stat.sco_rx++;
3167
3168 hci_dev_lock(hdev);
3169 conn = hci_conn_hash_lookup_handle(hdev, handle);
3170 hci_dev_unlock(hdev);
3171
3172 if (conn) {
1da177e4 3173 /* Send to upper protocol */
686ebf28
UF		 3174 sco_recv_scodata(conn, skb);
3175 return;
1da177e4 3176 } else {
8e87d142 3177 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 3178 hdev->name, handle);
1da177e4
LT		 3179 }
3180
3181 kfree_skb(skb);
3182}
3183
b78752cc 3184static void hci_rx_work(struct work_struct *work)
1da177e4 3185{
b78752cc 3186 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 3187 struct sk_buff *skb;
3188
3189 BT_DBG("%s", hdev->name);
3190
1da177e4 3191 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 3192 /* Send copy to monitor */
3193 hci_send_to_monitor(hdev, skb);
3194
1da177e4
LT		 3195 if (atomic_read(&hdev->promisc)) {
3196 /* Send copy to the sockets */
470fe1b5 3197 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3198 }
3199
3200 if (test_bit(HCI_RAW, &hdev->flags)) {
3201 kfree_skb(skb);
3202 continue;
3203 }
3204
3205 if (test_bit(HCI_INIT, &hdev->flags)) {
3206 /* Don't process data packets in this states. */
0d48d939 3207 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 3208 case HCI_ACLDATA_PKT:
3209 case HCI_SCODATA_PKT:
3210 kfree_skb(skb);
3211 continue;
3ff50b79 3212 }
1da177e4
LT		 3213 }
3214
3215 /* Process frame */
0d48d939 3216 switch (bt_cb(skb)->pkt_type) {
1da177e4 3217 case HCI_EVENT_PKT:
b78752cc 3218 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 3219 hci_event_packet(hdev, skb);
3220 break;
3221
3222 case HCI_ACLDATA_PKT:
3223 BT_DBG("%s ACL data packet", hdev->name);
3224 hci_acldata_packet(hdev, skb);
3225 break;
3226
3227 case HCI_SCODATA_PKT:
3228 BT_DBG("%s SCO data packet", hdev->name);
3229 hci_scodata_packet(hdev, skb);
3230 break;
3231
3232 default:
3233 kfree_skb(skb);
3234 break;
3235 }
3236 }
1da177e4
LT		 3237}
3238
c347b765 3239static void hci_cmd_work(struct work_struct *work)
1da177e4 3240{
c347b765 3241 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 3242 struct sk_buff *skb;
3243
2104786b
AE		 3244 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3245 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 3246
1da177e4 3247 /* Send queued commands */
5a08ecce
AE		 3248 if (atomic_read(&hdev->cmd_cnt)) {
3249 skb = skb_dequeue(&hdev->cmd_q);
3250 if (!skb)
3251 return;
3252
7585b97a 3253 kfree_skb(hdev->sent_cmd);
1da177e4 3254
70f23020
AE		 3255 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3256 if (hdev->sent_cmd) {
1da177e4
LT		 3257 atomic_dec(&hdev->cmd_cnt);
3258 hci_send_frame(skb);
7bdb8a5c
SJ		 3259 if (test_bit(HCI_RESET, &hdev->flags))
3260 del_timer(&hdev->cmd_timer);
3261 else
3262 mod_timer(&hdev->cmd_timer,
5f246e89 3263 jiffies + HCI_CMD_TIMEOUT);
1da177e4
LT		 3264 } else {
3265 skb_queue_head(&hdev->cmd_q, skb);
c347b765 3266 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3267 }
3268 }
3269}
2519a1fc
AG		 3270
3271int hci_do_inquiry(struct hci_dev *hdev, u8 length)
3272{
3273 /* General inquiry access code (GIAC) */
3274 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3275 struct hci_cp_inquiry cp;
3276
3277 BT_DBG("%s", hdev->name);
3278
3279 if (test_bit(HCI_INQUIRY, &hdev->flags))
3280 return -EINPROGRESS;
3281
4663262c
JH		 3282 inquiry_cache_flush(hdev);
3283
2519a1fc
AG		 3284 memset(&cp, 0, sizeof(cp));
3285 memcpy(&cp.lap, lap, sizeof(cp.lap));
3286 cp.length = length;
3287
3288 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
3289}
023d5049
AG		 3290
3291int hci_cancel_inquiry(struct hci_dev *hdev)
3292{
3293 BT_DBG("%s", hdev->name);
3294
3295 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 3296 return -EALREADY;
023d5049
AG		 3297
3298 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
3299}
31f7956c
AG		 3300
3301u8 bdaddr_to_le(u8 bdaddr_type)
3302{
3303 switch (bdaddr_type) {
3304 case BDADDR_LE_PUBLIC:
3305 return ADDR_LE_DEV_PUBLIC;
3306
3307 default:
3308 /* Fallback to LE Random address type */
3309 return ADDR_LE_DEV_RANDOM;
3310 }
3311}
kernel source for telekom puls (alcatel/mediatek)