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Bluetooth: Move HCI_RUNNING check into hci_send_frame
[mirror_ubuntu-bionic-kernel.git] / net / bluetooth / hci_core.c
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI core. */
27
28 #include <linux/export.h>
29 #include <linux/idr.h>
30 #include <linux/rfkill.h>
31 #include <linux/debugfs.h>
32 #include <linux/crypto.h>
33 #include <asm/unaligned.h>
34
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37 #include <net/bluetooth/l2cap.h>
38 #include <net/bluetooth/mgmt.h>
39
40 #include "hci_request.h"
41 #include "hci_debugfs.h"
42 #include "smp.h"
43
44 static void hci_rx_work(struct work_struct *work);
45 static void hci_cmd_work(struct work_struct *work);
46 static void hci_tx_work(struct work_struct *work);
47
48 /* HCI device list */
49 LIST_HEAD(hci_dev_list);
50 DEFINE_RWLOCK(hci_dev_list_lock);
51
52 /* HCI callback list */
53 LIST_HEAD(hci_cb_list);
54 DEFINE_MUTEX(hci_cb_list_lock);
55
56 /* HCI ID Numbering */
57 static DEFINE_IDA(hci_index_ida);
58
59 /* ----- HCI requests ----- */
60
61 #define HCI_REQ_DONE 0
62 #define HCI_REQ_PEND 1
63 #define HCI_REQ_CANCELED 2
64
65 #define hci_req_lock(d) mutex_lock(&d->req_lock)
66 #define hci_req_unlock(d) mutex_unlock(&d->req_lock)
67
68 /* ---- HCI notifications ---- */
69
70 static void hci_notify(struct hci_dev *hdev, int event)
71 {
72 hci_sock_dev_event(hdev, event);
73 }
74
75 /* ---- HCI debugfs entries ---- */
76
77 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
78 size_t count, loff_t *ppos)
79 {
80 struct hci_dev *hdev = file->private_data;
81 char buf[3];
82
83 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y': 'N';
84 buf[1] = '\n';
85 buf[2] = '\0';
86 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
87 }
88
89 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
90 size_t count, loff_t *ppos)
91 {
92 struct hci_dev *hdev = file->private_data;
93 struct sk_buff *skb;
94 char buf[32];
95 size_t buf_size = min(count, (sizeof(buf)-1));
96 bool enable;
97
98 if (!test_bit(HCI_UP, &hdev->flags))
99 return -ENETDOWN;
100
101 if (copy_from_user(buf, user_buf, buf_size))
102 return -EFAULT;
103
104 buf[buf_size] = '\0';
105 if (strtobool(buf, &enable))
106 return -EINVAL;
107
108 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
109 return -EALREADY;
110
111 hci_req_lock(hdev);
112 if (enable)
113 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
114 HCI_CMD_TIMEOUT);
115 else
116 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
117 HCI_CMD_TIMEOUT);
118 hci_req_unlock(hdev);
119
120 if (IS_ERR(skb))
121 return PTR_ERR(skb);
122
123 kfree_skb(skb);
124
125 hci_dev_change_flag(hdev, HCI_DUT_MODE);
126
127 return count;
128 }
129
130 static const struct file_operations dut_mode_fops = {
131 .open = simple_open,
132 .read = dut_mode_read,
133 .write = dut_mode_write,
134 .llseek = default_llseek,
135 };
136
137 /* ---- HCI requests ---- */
138
139 static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
140 struct sk_buff *skb)
141 {
142 BT_DBG("%s result 0x%2.2x", hdev->name, result);
143
144 if (hdev->req_status == HCI_REQ_PEND) {
145 hdev->req_result = result;
146 hdev->req_status = HCI_REQ_DONE;
147 if (skb)
148 hdev->req_skb = skb_get(skb);
149 wake_up_interruptible(&hdev->req_wait_q);
150 }
151 }
152
153 static void hci_req_cancel(struct hci_dev *hdev, int err)
154 {
155 BT_DBG("%s err 0x%2.2x", hdev->name, err);
156
157 if (hdev->req_status == HCI_REQ_PEND) {
158 hdev->req_result = err;
159 hdev->req_status = HCI_REQ_CANCELED;
160 wake_up_interruptible(&hdev->req_wait_q);
161 }
162 }
163
164 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
165 const void *param, u8 event, u32 timeout)
166 {
167 DECLARE_WAITQUEUE(wait, current);
168 struct hci_request req;
169 struct sk_buff *skb;
170 int err = 0;
171
172 BT_DBG("%s", hdev->name);
173
174 hci_req_init(&req, hdev);
175
176 hci_req_add_ev(&req, opcode, plen, param, event);
177
178 hdev->req_status = HCI_REQ_PEND;
179
180 add_wait_queue(&hdev->req_wait_q, &wait);
181 set_current_state(TASK_INTERRUPTIBLE);
182
183 err = hci_req_run_skb(&req, hci_req_sync_complete);
184 if (err < 0) {
185 remove_wait_queue(&hdev->req_wait_q, &wait);
186 set_current_state(TASK_RUNNING);
187 return ERR_PTR(err);
188 }
189
190 schedule_timeout(timeout);
191
192 remove_wait_queue(&hdev->req_wait_q, &wait);
193
194 if (signal_pending(current))
195 return ERR_PTR(-EINTR);
196
197 switch (hdev->req_status) {
198 case HCI_REQ_DONE:
199 err = -bt_to_errno(hdev->req_result);
200 break;
201
202 case HCI_REQ_CANCELED:
203 err = -hdev->req_result;
204 break;
205
206 default:
207 err = -ETIMEDOUT;
208 break;
209 }
210
211 hdev->req_status = hdev->req_result = 0;
212 skb = hdev->req_skb;
213 hdev->req_skb = NULL;
214
215 BT_DBG("%s end: err %d", hdev->name, err);
216
217 if (err < 0) {
218 kfree_skb(skb);
219 return ERR_PTR(err);
220 }
221
222 if (!skb)
223 return ERR_PTR(-ENODATA);
224
225 return skb;
226 }
227 EXPORT_SYMBOL(__hci_cmd_sync_ev);
228
229 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
230 const void *param, u32 timeout)
231 {
232 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
233 }
234 EXPORT_SYMBOL(__hci_cmd_sync);
235
236 /* Execute request and wait for completion. */
237 static int __hci_req_sync(struct hci_dev *hdev,
238 void (*func)(struct hci_request *req,
239 unsigned long opt),
240 unsigned long opt, __u32 timeout)
241 {
242 struct hci_request req;
243 DECLARE_WAITQUEUE(wait, current);
244 int err = 0;
245
246 BT_DBG("%s start", hdev->name);
247
248 hci_req_init(&req, hdev);
249
250 hdev->req_status = HCI_REQ_PEND;
251
252 func(&req, opt);
253
254 add_wait_queue(&hdev->req_wait_q, &wait);
255 set_current_state(TASK_INTERRUPTIBLE);
256
257 err = hci_req_run_skb(&req, hci_req_sync_complete);
258 if (err < 0) {
259 hdev->req_status = 0;
260
261 remove_wait_queue(&hdev->req_wait_q, &wait);
262 set_current_state(TASK_RUNNING);
263
264 /* ENODATA means the HCI request command queue is empty.
265 * This can happen when a request with conditionals doesn't
266 * trigger any commands to be sent. This is normal behavior
267 * and should not trigger an error return.
268 */
269 if (err == -ENODATA)
270 return 0;
271
272 return err;
273 }
274
275 schedule_timeout(timeout);
276
277 remove_wait_queue(&hdev->req_wait_q, &wait);
278
279 if (signal_pending(current))
280 return -EINTR;
281
282 switch (hdev->req_status) {
283 case HCI_REQ_DONE:
284 err = -bt_to_errno(hdev->req_result);
285 break;
286
287 case HCI_REQ_CANCELED:
288 err = -hdev->req_result;
289 break;
290
291 default:
292 err = -ETIMEDOUT;
293 break;
294 }
295
296 hdev->req_status = hdev->req_result = 0;
297
298 BT_DBG("%s end: err %d", hdev->name, err);
299
300 return err;
301 }
302
303 static int hci_req_sync(struct hci_dev *hdev,
304 void (*req)(struct hci_request *req,
305 unsigned long opt),
306 unsigned long opt, __u32 timeout)
307 {
308 int ret;
309
310 if (!test_bit(HCI_UP, &hdev->flags))
311 return -ENETDOWN;
312
313 /* Serialize all requests */
314 hci_req_lock(hdev);
315 ret = __hci_req_sync(hdev, req, opt, timeout);
316 hci_req_unlock(hdev);
317
318 return ret;
319 }
320
321 static void hci_reset_req(struct hci_request *req, unsigned long opt)
322 {
323 BT_DBG("%s %ld", req->hdev->name, opt);
324
325 /* Reset device */
326 set_bit(HCI_RESET, &req->hdev->flags);
327 hci_req_add(req, HCI_OP_RESET, 0, NULL);
328 }
329
330 static void bredr_init(struct hci_request *req)
331 {
332 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
333
334 /* Read Local Supported Features */
335 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
336
337 /* Read Local Version */
338 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
339
340 /* Read BD Address */
341 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
342 }
343
344 static void amp_init1(struct hci_request *req)
345 {
346 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
347
348 /* Read Local Version */
349 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
350
351 /* Read Local Supported Commands */
352 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
353
354 /* Read Local AMP Info */
355 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
356
357 /* Read Data Blk size */
358 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
359
360 /* Read Flow Control Mode */
361 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
362
363 /* Read Location Data */
364 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
365 }
366
367 static void amp_init2(struct hci_request *req)
368 {
369 /* Read Local Supported Features. Not all AMP controllers
370 * support this so it's placed conditionally in the second
371 * stage init.
372 */
373 if (req->hdev->commands[14] & 0x20)
374 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
375 }
376
377 static void hci_init1_req(struct hci_request *req, unsigned long opt)
378 {
379 struct hci_dev *hdev = req->hdev;
380
381 BT_DBG("%s %ld", hdev->name, opt);
382
383 /* Reset */
384 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
385 hci_reset_req(req, 0);
386
387 switch (hdev->dev_type) {
388 case HCI_BREDR:
389 bredr_init(req);
390 break;
391
392 case HCI_AMP:
393 amp_init1(req);
394 break;
395
396 default:
397 BT_ERR("Unknown device type %d", hdev->dev_type);
398 break;
399 }
400 }
401
402 static void bredr_setup(struct hci_request *req)
403 {
404 __le16 param;
405 __u8 flt_type;
406
407 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
408 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
409
410 /* Read Class of Device */
411 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
412
413 /* Read Local Name */
414 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
415
416 /* Read Voice Setting */
417 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
418
419 /* Read Number of Supported IAC */
420 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
421
422 /* Read Current IAC LAP */
423 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
424
425 /* Clear Event Filters */
426 flt_type = HCI_FLT_CLEAR_ALL;
427 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
428
429 /* Connection accept timeout ~20 secs */
430 param = cpu_to_le16(0x7d00);
431 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
432 }
433
434 static void le_setup(struct hci_request *req)
435 {
436 struct hci_dev *hdev = req->hdev;
437
438 /* Read LE Buffer Size */
439 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
440
441 /* Read LE Local Supported Features */
442 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
443
444 /* Read LE Supported States */
445 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
446
447 /* Read LE White List Size */
448 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
449
450 /* Clear LE White List */
451 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
452
453 /* LE-only controllers have LE implicitly enabled */
454 if (!lmp_bredr_capable(hdev))
455 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
456 }
457
458 static void hci_setup_event_mask(struct hci_request *req)
459 {
460 struct hci_dev *hdev = req->hdev;
461
462 /* The second byte is 0xff instead of 0x9f (two reserved bits
463 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
464 * command otherwise.
465 */
466 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
467
468 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
469 * any event mask for pre 1.2 devices.
470 */
471 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
472 return;
473
474 if (lmp_bredr_capable(hdev)) {
475 events[4] |= 0x01; /* Flow Specification Complete */
476 events[4] |= 0x02; /* Inquiry Result with RSSI */
477 events[4] |= 0x04; /* Read Remote Extended Features Complete */
478 events[5] |= 0x08; /* Synchronous Connection Complete */
479 events[5] |= 0x10; /* Synchronous Connection Changed */
480 } else {
481 /* Use a different default for LE-only devices */
482 memset(events, 0, sizeof(events));
483 events[0] |= 0x10; /* Disconnection Complete */
484 events[1] |= 0x08; /* Read Remote Version Information Complete */
485 events[1] |= 0x20; /* Command Complete */
486 events[1] |= 0x40; /* Command Status */
487 events[1] |= 0x80; /* Hardware Error */
488 events[2] |= 0x04; /* Number of Completed Packets */
489 events[3] |= 0x02; /* Data Buffer Overflow */
490
491 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
492 events[0] |= 0x80; /* Encryption Change */
493 events[5] |= 0x80; /* Encryption Key Refresh Complete */
494 }
495 }
496
497 if (lmp_inq_rssi_capable(hdev))
498 events[4] |= 0x02; /* Inquiry Result with RSSI */
499
500 if (lmp_sniffsubr_capable(hdev))
501 events[5] |= 0x20; /* Sniff Subrating */
502
503 if (lmp_pause_enc_capable(hdev))
504 events[5] |= 0x80; /* Encryption Key Refresh Complete */
505
506 if (lmp_ext_inq_capable(hdev))
507 events[5] |= 0x40; /* Extended Inquiry Result */
508
509 if (lmp_no_flush_capable(hdev))
510 events[7] |= 0x01; /* Enhanced Flush Complete */
511
512 if (lmp_lsto_capable(hdev))
513 events[6] |= 0x80; /* Link Supervision Timeout Changed */
514
515 if (lmp_ssp_capable(hdev)) {
516 events[6] |= 0x01; /* IO Capability Request */
517 events[6] |= 0x02; /* IO Capability Response */
518 events[6] |= 0x04; /* User Confirmation Request */
519 events[6] |= 0x08; /* User Passkey Request */
520 events[6] |= 0x10; /* Remote OOB Data Request */
521 events[6] |= 0x20; /* Simple Pairing Complete */
522 events[7] |= 0x04; /* User Passkey Notification */
523 events[7] |= 0x08; /* Keypress Notification */
524 events[7] |= 0x10; /* Remote Host Supported
525 * Features Notification
526 */
527 }
528
529 if (lmp_le_capable(hdev))
530 events[7] |= 0x20; /* LE Meta-Event */
531
532 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
533 }
534
535 static void hci_init2_req(struct hci_request *req, unsigned long opt)
536 {
537 struct hci_dev *hdev = req->hdev;
538
539 if (hdev->dev_type == HCI_AMP)
540 return amp_init2(req);
541
542 if (lmp_bredr_capable(hdev))
543 bredr_setup(req);
544 else
545 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
546
547 if (lmp_le_capable(hdev))
548 le_setup(req);
549
550 /* All Bluetooth 1.2 and later controllers should support the
551 * HCI command for reading the local supported commands.
552 *
553 * Unfortunately some controllers indicate Bluetooth 1.2 support,
554 * but do not have support for this command. If that is the case,
555 * the driver can quirk the behavior and skip reading the local
556 * supported commands.
557 */
558 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
559 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
560 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
561
562 if (lmp_ssp_capable(hdev)) {
563 /* When SSP is available, then the host features page
564 * should also be available as well. However some
565 * controllers list the max_page as 0 as long as SSP
566 * has not been enabled. To achieve proper debugging
567 * output, force the minimum max_page to 1 at least.
568 */
569 hdev->max_page = 0x01;
570
571 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
572 u8 mode = 0x01;
573
574 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
575 sizeof(mode), &mode);
576 } else {
577 struct hci_cp_write_eir cp;
578
579 memset(hdev->eir, 0, sizeof(hdev->eir));
580 memset(&cp, 0, sizeof(cp));
581
582 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
583 }
584 }
585
586 if (lmp_inq_rssi_capable(hdev) ||
587 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
588 u8 mode;
589
590 /* If Extended Inquiry Result events are supported, then
591 * they are clearly preferred over Inquiry Result with RSSI
592 * events.
593 */
594 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
595
596 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
597 }
598
599 if (lmp_inq_tx_pwr_capable(hdev))
600 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
601
602 if (lmp_ext_feat_capable(hdev)) {
603 struct hci_cp_read_local_ext_features cp;
604
605 cp.page = 0x01;
606 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
607 sizeof(cp), &cp);
608 }
609
610 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
611 u8 enable = 1;
612 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
613 &enable);
614 }
615 }
616
617 static void hci_setup_link_policy(struct hci_request *req)
618 {
619 struct hci_dev *hdev = req->hdev;
620 struct hci_cp_write_def_link_policy cp;
621 u16 link_policy = 0;
622
623 if (lmp_rswitch_capable(hdev))
624 link_policy |= HCI_LP_RSWITCH;
625 if (lmp_hold_capable(hdev))
626 link_policy |= HCI_LP_HOLD;
627 if (lmp_sniff_capable(hdev))
628 link_policy |= HCI_LP_SNIFF;
629 if (lmp_park_capable(hdev))
630 link_policy |= HCI_LP_PARK;
631
632 cp.policy = cpu_to_le16(link_policy);
633 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
634 }
635
636 static void hci_set_le_support(struct hci_request *req)
637 {
638 struct hci_dev *hdev = req->hdev;
639 struct hci_cp_write_le_host_supported cp;
640
641 /* LE-only devices do not support explicit enablement */
642 if (!lmp_bredr_capable(hdev))
643 return;
644
645 memset(&cp, 0, sizeof(cp));
646
647 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
648 cp.le = 0x01;
649 cp.simul = 0x00;
650 }
651
652 if (cp.le != lmp_host_le_capable(hdev))
653 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
654 &cp);
655 }
656
657 static void hci_set_event_mask_page_2(struct hci_request *req)
658 {
659 struct hci_dev *hdev = req->hdev;
660 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
661
662 /* If Connectionless Slave Broadcast master role is supported
663 * enable all necessary events for it.
664 */
665 if (lmp_csb_master_capable(hdev)) {
666 events[1] |= 0x40; /* Triggered Clock Capture */
667 events[1] |= 0x80; /* Synchronization Train Complete */
668 events[2] |= 0x10; /* Slave Page Response Timeout */
669 events[2] |= 0x20; /* CSB Channel Map Change */
670 }
671
672 /* If Connectionless Slave Broadcast slave role is supported
673 * enable all necessary events for it.
674 */
675 if (lmp_csb_slave_capable(hdev)) {
676 events[2] |= 0x01; /* Synchronization Train Received */
677 events[2] |= 0x02; /* CSB Receive */
678 events[2] |= 0x04; /* CSB Timeout */
679 events[2] |= 0x08; /* Truncated Page Complete */
680 }
681
682 /* Enable Authenticated Payload Timeout Expired event if supported */
683 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
684 events[2] |= 0x80;
685
686 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
687 }
688
689 static void hci_init3_req(struct hci_request *req, unsigned long opt)
690 {
691 struct hci_dev *hdev = req->hdev;
692 u8 p;
693
694 hci_setup_event_mask(req);
695
696 if (hdev->commands[6] & 0x20 &&
697 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
698 struct hci_cp_read_stored_link_key cp;
699
700 bacpy(&cp.bdaddr, BDADDR_ANY);
701 cp.read_all = 0x01;
702 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
703 }
704
705 if (hdev->commands[5] & 0x10)
706 hci_setup_link_policy(req);
707
708 if (hdev->commands[8] & 0x01)
709 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
710
711 /* Some older Broadcom based Bluetooth 1.2 controllers do not
712 * support the Read Page Scan Type command. Check support for
713 * this command in the bit mask of supported commands.
714 */
715 if (hdev->commands[13] & 0x01)
716 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
717
718 if (lmp_le_capable(hdev)) {
719 u8 events[8];
720
721 memset(events, 0, sizeof(events));
722 events[0] = 0x0f;
723
724 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
725 events[0] |= 0x10; /* LE Long Term Key Request */
726
727 /* If controller supports the Connection Parameters Request
728 * Link Layer Procedure, enable the corresponding event.
729 */
730 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
731 events[0] |= 0x20; /* LE Remote Connection
732 * Parameter Request
733 */
734
735 /* If the controller supports the Data Length Extension
736 * feature, enable the corresponding event.
737 */
738 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
739 events[0] |= 0x40; /* LE Data Length Change */
740
741 /* If the controller supports Extended Scanner Filter
742 * Policies, enable the correspondig event.
743 */
744 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
745 events[1] |= 0x04; /* LE Direct Advertising
746 * Report
747 */
748
749 /* If the controller supports the LE Read Local P-256
750 * Public Key command, enable the corresponding event.
751 */
752 if (hdev->commands[34] & 0x02)
753 events[0] |= 0x80; /* LE Read Local P-256
754 * Public Key Complete
755 */
756
757 /* If the controller supports the LE Generate DHKey
758 * command, enable the corresponding event.
759 */
760 if (hdev->commands[34] & 0x04)
761 events[1] |= 0x01; /* LE Generate DHKey Complete */
762
763 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
764 events);
765
766 if (hdev->commands[25] & 0x40) {
767 /* Read LE Advertising Channel TX Power */
768 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
769 }
770
771 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
772 /* Read LE Maximum Data Length */
773 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
774
775 /* Read LE Suggested Default Data Length */
776 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
777 }
778
779 hci_set_le_support(req);
780 }
781
782 /* Read features beyond page 1 if available */
783 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
784 struct hci_cp_read_local_ext_features cp;
785
786 cp.page = p;
787 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
788 sizeof(cp), &cp);
789 }
790 }
791
792 static void hci_init4_req(struct hci_request *req, unsigned long opt)
793 {
794 struct hci_dev *hdev = req->hdev;
795
796 /* Some Broadcom based Bluetooth controllers do not support the
797 * Delete Stored Link Key command. They are clearly indicating its
798 * absence in the bit mask of supported commands.
799 *
800 * Check the supported commands and only if the the command is marked
801 * as supported send it. If not supported assume that the controller
802 * does not have actual support for stored link keys which makes this
803 * command redundant anyway.
804 *
805 * Some controllers indicate that they support handling deleting
806 * stored link keys, but they don't. The quirk lets a driver
807 * just disable this command.
808 */
809 if (hdev->commands[6] & 0x80 &&
810 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
811 struct hci_cp_delete_stored_link_key cp;
812
813 bacpy(&cp.bdaddr, BDADDR_ANY);
814 cp.delete_all = 0x01;
815 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
816 sizeof(cp), &cp);
817 }
818
819 /* Set event mask page 2 if the HCI command for it is supported */
820 if (hdev->commands[22] & 0x04)
821 hci_set_event_mask_page_2(req);
822
823 /* Read local codec list if the HCI command is supported */
824 if (hdev->commands[29] & 0x20)
825 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
826
827 /* Get MWS transport configuration if the HCI command is supported */
828 if (hdev->commands[30] & 0x08)
829 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
830
831 /* Check for Synchronization Train support */
832 if (lmp_sync_train_capable(hdev))
833 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
834
835 /* Enable Secure Connections if supported and configured */
836 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
837 bredr_sc_enabled(hdev)) {
838 u8 support = 0x01;
839
840 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
841 sizeof(support), &support);
842 }
843 }
844
845 static int __hci_init(struct hci_dev *hdev)
846 {
847 int err;
848
849 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
850 if (err < 0)
851 return err;
852
853 /* The Device Under Test (DUT) mode is special and available for
854 * all controller types. So just create it early on.
855 */
856 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
857 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
858 &dut_mode_fops);
859 }
860
861 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
862 if (err < 0)
863 return err;
864
865 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
866 * BR/EDR/LE type controllers. AMP controllers only need the
867 * first two stages of init.
868 */
869 if (hdev->dev_type != HCI_BREDR)
870 return 0;
871
872 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
873 if (err < 0)
874 return err;
875
876 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
877 if (err < 0)
878 return err;
879
880 /* This function is only called when the controller is actually in
881 * configured state. When the controller is marked as unconfigured,
882 * this initialization procedure is not run.
883 *
884 * It means that it is possible that a controller runs through its
885 * setup phase and then discovers missing settings. If that is the
886 * case, then this function will not be called. It then will only
887 * be called during the config phase.
888 *
889 * So only when in setup phase or config phase, create the debugfs
890 * entries and register the SMP channels.
891 */
892 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
893 !hci_dev_test_flag(hdev, HCI_CONFIG))
894 return 0;
895
896 hci_debugfs_create_common(hdev);
897
898 if (lmp_bredr_capable(hdev))
899 hci_debugfs_create_bredr(hdev);
900
901 if (lmp_le_capable(hdev))
902 hci_debugfs_create_le(hdev);
903
904 return 0;
905 }
906
907 static void hci_init0_req(struct hci_request *req, unsigned long opt)
908 {
909 struct hci_dev *hdev = req->hdev;
910
911 BT_DBG("%s %ld", hdev->name, opt);
912
913 /* Reset */
914 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
915 hci_reset_req(req, 0);
916
917 /* Read Local Version */
918 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
919
920 /* Read BD Address */
921 if (hdev->set_bdaddr)
922 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
923 }
924
925 static int __hci_unconf_init(struct hci_dev *hdev)
926 {
927 int err;
928
929 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
930 return 0;
931
932 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
933 if (err < 0)
934 return err;
935
936 return 0;
937 }
938
939 static void hci_scan_req(struct hci_request *req, unsigned long opt)
940 {
941 __u8 scan = opt;
942
943 BT_DBG("%s %x", req->hdev->name, scan);
944
945 /* Inquiry and Page scans */
946 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
947 }
948
949 static void hci_auth_req(struct hci_request *req, unsigned long opt)
950 {
951 __u8 auth = opt;
952
953 BT_DBG("%s %x", req->hdev->name, auth);
954
955 /* Authentication */
956 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
957 }
958
959 static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
960 {
961 __u8 encrypt = opt;
962
963 BT_DBG("%s %x", req->hdev->name, encrypt);
964
965 /* Encryption */
966 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
967 }
968
969 static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
970 {
971 __le16 policy = cpu_to_le16(opt);
972
973 BT_DBG("%s %x", req->hdev->name, policy);
974
975 /* Default link policy */
976 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
977 }
978
979 /* Get HCI device by index.
980 * Device is held on return. */
981 struct hci_dev *hci_dev_get(int index)
982 {
983 struct hci_dev *hdev = NULL, *d;
984
985 BT_DBG("%d", index);
986
987 if (index < 0)
988 return NULL;
989
990 read_lock(&hci_dev_list_lock);
991 list_for_each_entry(d, &hci_dev_list, list) {
992 if (d->id == index) {
993 hdev = hci_dev_hold(d);
994 break;
995 }
996 }
997 read_unlock(&hci_dev_list_lock);
998 return hdev;
999 }
1000
1001 /* ---- Inquiry support ---- */
1002
1003 bool hci_discovery_active(struct hci_dev *hdev)
1004 {
1005 struct discovery_state *discov = &hdev->discovery;
1006
1007 switch (discov->state) {
1008 case DISCOVERY_FINDING:
1009 case DISCOVERY_RESOLVING:
1010 return true;
1011
1012 default:
1013 return false;
1014 }
1015 }
1016
1017 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1018 {
1019 int old_state = hdev->discovery.state;
1020
1021 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1022
1023 if (old_state == state)
1024 return;
1025
1026 hdev->discovery.state = state;
1027
1028 switch (state) {
1029 case DISCOVERY_STOPPED:
1030 hci_update_background_scan(hdev);
1031
1032 if (old_state != DISCOVERY_STARTING)
1033 mgmt_discovering(hdev, 0);
1034 break;
1035 case DISCOVERY_STARTING:
1036 break;
1037 case DISCOVERY_FINDING:
1038 mgmt_discovering(hdev, 1);
1039 break;
1040 case DISCOVERY_RESOLVING:
1041 break;
1042 case DISCOVERY_STOPPING:
1043 break;
1044 }
1045 }
1046
1047 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1048 {
1049 struct discovery_state *cache = &hdev->discovery;
1050 struct inquiry_entry *p, *n;
1051
1052 list_for_each_entry_safe(p, n, &cache->all, all) {
1053 list_del(&p->all);
1054 kfree(p);
1055 }
1056
1057 INIT_LIST_HEAD(&cache->unknown);
1058 INIT_LIST_HEAD(&cache->resolve);
1059 }
1060
1061 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1062 bdaddr_t *bdaddr)
1063 {
1064 struct discovery_state *cache = &hdev->discovery;
1065 struct inquiry_entry *e;
1066
1067 BT_DBG("cache %p, %pMR", cache, bdaddr);
1068
1069 list_for_each_entry(e, &cache->all, all) {
1070 if (!bacmp(&e->data.bdaddr, bdaddr))
1071 return e;
1072 }
1073
1074 return NULL;
1075 }
1076
1077 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1078 bdaddr_t *bdaddr)
1079 {
1080 struct discovery_state *cache = &hdev->discovery;
1081 struct inquiry_entry *e;
1082
1083 BT_DBG("cache %p, %pMR", cache, bdaddr);
1084
1085 list_for_each_entry(e, &cache->unknown, list) {
1086 if (!bacmp(&e->data.bdaddr, bdaddr))
1087 return e;
1088 }
1089
1090 return NULL;
1091 }
1092
1093 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1094 bdaddr_t *bdaddr,
1095 int state)
1096 {
1097 struct discovery_state *cache = &hdev->discovery;
1098 struct inquiry_entry *e;
1099
1100 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1101
1102 list_for_each_entry(e, &cache->resolve, list) {
1103 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1104 return e;
1105 if (!bacmp(&e->data.bdaddr, bdaddr))
1106 return e;
1107 }
1108
1109 return NULL;
1110 }
1111
1112 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1113 struct inquiry_entry *ie)
1114 {
1115 struct discovery_state *cache = &hdev->discovery;
1116 struct list_head *pos = &cache->resolve;
1117 struct inquiry_entry *p;
1118
1119 list_del(&ie->list);
1120
1121 list_for_each_entry(p, &cache->resolve, list) {
1122 if (p->name_state != NAME_PENDING &&
1123 abs(p->data.rssi) >= abs(ie->data.rssi))
1124 break;
1125 pos = &p->list;
1126 }
1127
1128 list_add(&ie->list, pos);
1129 }
1130
1131 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1132 bool name_known)
1133 {
1134 struct discovery_state *cache = &hdev->discovery;
1135 struct inquiry_entry *ie;
1136 u32 flags = 0;
1137
1138 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1139
1140 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1141
1142 if (!data->ssp_mode)
1143 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1144
1145 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1146 if (ie) {
1147 if (!ie->data.ssp_mode)
1148 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1149
1150 if (ie->name_state == NAME_NEEDED &&
1151 data->rssi != ie->data.rssi) {
1152 ie->data.rssi = data->rssi;
1153 hci_inquiry_cache_update_resolve(hdev, ie);
1154 }
1155
1156 goto update;
1157 }
1158
1159 /* Entry not in the cache. Add new one. */
1160 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1161 if (!ie) {
1162 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1163 goto done;
1164 }
1165
1166 list_add(&ie->all, &cache->all);
1167
1168 if (name_known) {
1169 ie->name_state = NAME_KNOWN;
1170 } else {
1171 ie->name_state = NAME_NOT_KNOWN;
1172 list_add(&ie->list, &cache->unknown);
1173 }
1174
1175 update:
1176 if (name_known && ie->name_state != NAME_KNOWN &&
1177 ie->name_state != NAME_PENDING) {
1178 ie->name_state = NAME_KNOWN;
1179 list_del(&ie->list);
1180 }
1181
1182 memcpy(&ie->data, data, sizeof(*data));
1183 ie->timestamp = jiffies;
1184 cache->timestamp = jiffies;
1185
1186 if (ie->name_state == NAME_NOT_KNOWN)
1187 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1188
1189 done:
1190 return flags;
1191 }
1192
1193 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1194 {
1195 struct discovery_state *cache = &hdev->discovery;
1196 struct inquiry_info *info = (struct inquiry_info *) buf;
1197 struct inquiry_entry *e;
1198 int copied = 0;
1199
1200 list_for_each_entry(e, &cache->all, all) {
1201 struct inquiry_data *data = &e->data;
1202
1203 if (copied >= num)
1204 break;
1205
1206 bacpy(&info->bdaddr, &data->bdaddr);
1207 info->pscan_rep_mode = data->pscan_rep_mode;
1208 info->pscan_period_mode = data->pscan_period_mode;
1209 info->pscan_mode = data->pscan_mode;
1210 memcpy(info->dev_class, data->dev_class, 3);
1211 info->clock_offset = data->clock_offset;
1212
1213 info++;
1214 copied++;
1215 }
1216
1217 BT_DBG("cache %p, copied %d", cache, copied);
1218 return copied;
1219 }
1220
1221 static void hci_inq_req(struct hci_request *req, unsigned long opt)
1222 {
1223 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1224 struct hci_dev *hdev = req->hdev;
1225 struct hci_cp_inquiry cp;
1226
1227 BT_DBG("%s", hdev->name);
1228
1229 if (test_bit(HCI_INQUIRY, &hdev->flags))
1230 return;
1231
1232 /* Start Inquiry */
1233 memcpy(&cp.lap, &ir->lap, 3);
1234 cp.length = ir->length;
1235 cp.num_rsp = ir->num_rsp;
1236 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1237 }
1238
1239 int hci_inquiry(void __user *arg)
1240 {
1241 __u8 __user *ptr = arg;
1242 struct hci_inquiry_req ir;
1243 struct hci_dev *hdev;
1244 int err = 0, do_inquiry = 0, max_rsp;
1245 long timeo;
1246 __u8 *buf;
1247
1248 if (copy_from_user(&ir, ptr, sizeof(ir)))
1249 return -EFAULT;
1250
1251 hdev = hci_dev_get(ir.dev_id);
1252 if (!hdev)
1253 return -ENODEV;
1254
1255 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1256 err = -EBUSY;
1257 goto done;
1258 }
1259
1260 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1261 err = -EOPNOTSUPP;
1262 goto done;
1263 }
1264
1265 if (hdev->dev_type != HCI_BREDR) {
1266 err = -EOPNOTSUPP;
1267 goto done;
1268 }
1269
1270 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1271 err = -EOPNOTSUPP;
1272 goto done;
1273 }
1274
1275 hci_dev_lock(hdev);
1276 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1277 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1278 hci_inquiry_cache_flush(hdev);
1279 do_inquiry = 1;
1280 }
1281 hci_dev_unlock(hdev);
1282
1283 timeo = ir.length * msecs_to_jiffies(2000);
1284
1285 if (do_inquiry) {
1286 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1287 timeo);
1288 if (err < 0)
1289 goto done;
1290
1291 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1292 * cleared). If it is interrupted by a signal, return -EINTR.
1293 */
1294 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1295 TASK_INTERRUPTIBLE))
1296 return -EINTR;
1297 }
1298
1299 /* for unlimited number of responses we will use buffer with
1300 * 255 entries
1301 */
1302 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1303
1304 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1305 * copy it to the user space.
1306 */
1307 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1308 if (!buf) {
1309 err = -ENOMEM;
1310 goto done;
1311 }
1312
1313 hci_dev_lock(hdev);
1314 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1315 hci_dev_unlock(hdev);
1316
1317 BT_DBG("num_rsp %d", ir.num_rsp);
1318
1319 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1320 ptr += sizeof(ir);
1321 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1322 ir.num_rsp))
1323 err = -EFAULT;
1324 } else
1325 err = -EFAULT;
1326
1327 kfree(buf);
1328
1329 done:
1330 hci_dev_put(hdev);
1331 return err;
1332 }
1333
1334 static int hci_dev_do_open(struct hci_dev *hdev)
1335 {
1336 int ret = 0;
1337
1338 BT_DBG("%s %p", hdev->name, hdev);
1339
1340 hci_req_lock(hdev);
1341
1342 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1343 ret = -ENODEV;
1344 goto done;
1345 }
1346
1347 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1348 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1349 /* Check for rfkill but allow the HCI setup stage to
1350 * proceed (which in itself doesn't cause any RF activity).
1351 */
1352 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1353 ret = -ERFKILL;
1354 goto done;
1355 }
1356
1357 /* Check for valid public address or a configured static
1358 * random adddress, but let the HCI setup proceed to
1359 * be able to determine if there is a public address
1360 * or not.
1361 *
1362 * In case of user channel usage, it is not important
1363 * if a public address or static random address is
1364 * available.
1365 *
1366 * This check is only valid for BR/EDR controllers
1367 * since AMP controllers do not have an address.
1368 */
1369 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1370 hdev->dev_type == HCI_BREDR &&
1371 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1372 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1373 ret = -EADDRNOTAVAIL;
1374 goto done;
1375 }
1376 }
1377
1378 if (test_bit(HCI_UP, &hdev->flags)) {
1379 ret = -EALREADY;
1380 goto done;
1381 }
1382
1383 if (hdev->open(hdev)) {
1384 ret = -EIO;
1385 goto done;
1386 }
1387
1388 hci_notify(hdev, HCI_DEV_OPEN);
1389
1390 atomic_set(&hdev->cmd_cnt, 1);
1391 set_bit(HCI_INIT, &hdev->flags);
1392
1393 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1394 if (hdev->setup)
1395 ret = hdev->setup(hdev);
1396
1397 /* The transport driver can set these quirks before
1398 * creating the HCI device or in its setup callback.
1399 *
1400 * In case any of them is set, the controller has to
1401 * start up as unconfigured.
1402 */
1403 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1404 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1405 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1406
1407 /* For an unconfigured controller it is required to
1408 * read at least the version information provided by
1409 * the Read Local Version Information command.
1410 *
1411 * If the set_bdaddr driver callback is provided, then
1412 * also the original Bluetooth public device address
1413 * will be read using the Read BD Address command.
1414 */
1415 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1416 ret = __hci_unconf_init(hdev);
1417 }
1418
1419 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1420 /* If public address change is configured, ensure that
1421 * the address gets programmed. If the driver does not
1422 * support changing the public address, fail the power
1423 * on procedure.
1424 */
1425 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1426 hdev->set_bdaddr)
1427 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1428 else
1429 ret = -EADDRNOTAVAIL;
1430 }
1431
1432 if (!ret) {
1433 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1434 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
1435 ret = __hci_init(hdev);
1436 }
1437
1438 clear_bit(HCI_INIT, &hdev->flags);
1439
1440 if (!ret) {
1441 hci_dev_hold(hdev);
1442 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1443 set_bit(HCI_UP, &hdev->flags);
1444 hci_notify(hdev, HCI_DEV_UP);
1445 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1446 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1447 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1448 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1449 hdev->dev_type == HCI_BREDR) {
1450 hci_dev_lock(hdev);
1451 mgmt_powered(hdev, 1);
1452 hci_dev_unlock(hdev);
1453 }
1454 } else {
1455 /* Init failed, cleanup */
1456 flush_work(&hdev->tx_work);
1457 flush_work(&hdev->cmd_work);
1458 flush_work(&hdev->rx_work);
1459
1460 skb_queue_purge(&hdev->cmd_q);
1461 skb_queue_purge(&hdev->rx_q);
1462
1463 if (hdev->flush)
1464 hdev->flush(hdev);
1465
1466 if (hdev->sent_cmd) {
1467 kfree_skb(hdev->sent_cmd);
1468 hdev->sent_cmd = NULL;
1469 }
1470
1471 hci_notify(hdev, HCI_DEV_CLOSE);
1472
1473 hdev->close(hdev);
1474 hdev->flags &= BIT(HCI_RAW);
1475 }
1476
1477 done:
1478 hci_req_unlock(hdev);
1479 return ret;
1480 }
1481
1482 /* ---- HCI ioctl helpers ---- */
1483
1484 int hci_dev_open(__u16 dev)
1485 {
1486 struct hci_dev *hdev;
1487 int err;
1488
1489 hdev = hci_dev_get(dev);
1490 if (!hdev)
1491 return -ENODEV;
1492
1493 /* Devices that are marked as unconfigured can only be powered
1494 * up as user channel. Trying to bring them up as normal devices
1495 * will result into a failure. Only user channel operation is
1496 * possible.
1497 *
1498 * When this function is called for a user channel, the flag
1499 * HCI_USER_CHANNEL will be set first before attempting to
1500 * open the device.
1501 */
1502 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1503 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1504 err = -EOPNOTSUPP;
1505 goto done;
1506 }
1507
1508 /* We need to ensure that no other power on/off work is pending
1509 * before proceeding to call hci_dev_do_open. This is
1510 * particularly important if the setup procedure has not yet
1511 * completed.
1512 */
1513 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1514 cancel_delayed_work(&hdev->power_off);
1515
1516 /* After this call it is guaranteed that the setup procedure
1517 * has finished. This means that error conditions like RFKILL
1518 * or no valid public or static random address apply.
1519 */
1520 flush_workqueue(hdev->req_workqueue);
1521
1522 /* For controllers not using the management interface and that
1523 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1524 * so that pairing works for them. Once the management interface
1525 * is in use this bit will be cleared again and userspace has
1526 * to explicitly enable it.
1527 */
1528 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1529 !hci_dev_test_flag(hdev, HCI_MGMT))
1530 hci_dev_set_flag(hdev, HCI_BONDABLE);
1531
1532 err = hci_dev_do_open(hdev);
1533
1534 done:
1535 hci_dev_put(hdev);
1536 return err;
1537 }
1538
1539 /* This function requires the caller holds hdev->lock */
1540 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1541 {
1542 struct hci_conn_params *p;
1543
1544 list_for_each_entry(p, &hdev->le_conn_params, list) {
1545 if (p->conn) {
1546 hci_conn_drop(p->conn);
1547 hci_conn_put(p->conn);
1548 p->conn = NULL;
1549 }
1550 list_del_init(&p->action);
1551 }
1552
1553 BT_DBG("All LE pending actions cleared");
1554 }
1555
1556 int hci_dev_do_close(struct hci_dev *hdev)
1557 {
1558 BT_DBG("%s %p", hdev->name, hdev);
1559
1560 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1561 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1562 test_bit(HCI_UP, &hdev->flags)) {
1563 /* Execute vendor specific shutdown routine */
1564 if (hdev->shutdown)
1565 hdev->shutdown(hdev);
1566 }
1567
1568 cancel_delayed_work(&hdev->power_off);
1569
1570 hci_req_cancel(hdev, ENODEV);
1571 hci_req_lock(hdev);
1572
1573 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1574 cancel_delayed_work_sync(&hdev->cmd_timer);
1575 hci_req_unlock(hdev);
1576 return 0;
1577 }
1578
1579 /* Flush RX and TX works */
1580 flush_work(&hdev->tx_work);
1581 flush_work(&hdev->rx_work);
1582
1583 if (hdev->discov_timeout > 0) {
1584 cancel_delayed_work(&hdev->discov_off);
1585 hdev->discov_timeout = 0;
1586 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1587 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1588 }
1589
1590 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1591 cancel_delayed_work(&hdev->service_cache);
1592
1593 cancel_delayed_work_sync(&hdev->le_scan_disable);
1594 cancel_delayed_work_sync(&hdev->le_scan_restart);
1595
1596 if (hci_dev_test_flag(hdev, HCI_MGMT))
1597 cancel_delayed_work_sync(&hdev->rpa_expired);
1598
1599 if (hdev->adv_instance_timeout) {
1600 cancel_delayed_work_sync(&hdev->adv_instance_expire);
1601 hdev->adv_instance_timeout = 0;
1602 }
1603
1604 /* Avoid potential lockdep warnings from the *_flush() calls by
1605 * ensuring the workqueue is empty up front.
1606 */
1607 drain_workqueue(hdev->workqueue);
1608
1609 hci_dev_lock(hdev);
1610
1611 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1612
1613 if (!hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
1614 if (hdev->dev_type == HCI_BREDR)
1615 mgmt_powered(hdev, 0);
1616 }
1617
1618 hci_inquiry_cache_flush(hdev);
1619 hci_pend_le_actions_clear(hdev);
1620 hci_conn_hash_flush(hdev);
1621 hci_dev_unlock(hdev);
1622
1623 smp_unregister(hdev);
1624
1625 hci_notify(hdev, HCI_DEV_DOWN);
1626
1627 if (hdev->flush)
1628 hdev->flush(hdev);
1629
1630 /* Reset device */
1631 skb_queue_purge(&hdev->cmd_q);
1632 atomic_set(&hdev->cmd_cnt, 1);
1633 if (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1634 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1635 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1636 set_bit(HCI_INIT, &hdev->flags);
1637 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1638 clear_bit(HCI_INIT, &hdev->flags);
1639 }
1640
1641 /* flush cmd work */
1642 flush_work(&hdev->cmd_work);
1643
1644 /* Drop queues */
1645 skb_queue_purge(&hdev->rx_q);
1646 skb_queue_purge(&hdev->cmd_q);
1647 skb_queue_purge(&hdev->raw_q);
1648
1649 /* Drop last sent command */
1650 if (hdev->sent_cmd) {
1651 cancel_delayed_work_sync(&hdev->cmd_timer);
1652 kfree_skb(hdev->sent_cmd);
1653 hdev->sent_cmd = NULL;
1654 }
1655
1656 hci_notify(hdev, HCI_DEV_CLOSE);
1657
1658 /* After this point our queues are empty
1659 * and no tasks are scheduled. */
1660 hdev->close(hdev);
1661
1662 /* Clear flags */
1663 hdev->flags &= BIT(HCI_RAW);
1664 hci_dev_clear_volatile_flags(hdev);
1665
1666 /* Controller radio is available but is currently powered down */
1667 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1668
1669 memset(hdev->eir, 0, sizeof(hdev->eir));
1670 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1671 bacpy(&hdev->random_addr, BDADDR_ANY);
1672
1673 hci_req_unlock(hdev);
1674
1675 hci_dev_put(hdev);
1676 return 0;
1677 }
1678
1679 int hci_dev_close(__u16 dev)
1680 {
1681 struct hci_dev *hdev;
1682 int err;
1683
1684 hdev = hci_dev_get(dev);
1685 if (!hdev)
1686 return -ENODEV;
1687
1688 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1689 err = -EBUSY;
1690 goto done;
1691 }
1692
1693 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1694 cancel_delayed_work(&hdev->power_off);
1695
1696 err = hci_dev_do_close(hdev);
1697
1698 done:
1699 hci_dev_put(hdev);
1700 return err;
1701 }
1702
1703 static int hci_dev_do_reset(struct hci_dev *hdev)
1704 {
1705 int ret;
1706
1707 BT_DBG("%s %p", hdev->name, hdev);
1708
1709 hci_req_lock(hdev);
1710
1711 /* Drop queues */
1712 skb_queue_purge(&hdev->rx_q);
1713 skb_queue_purge(&hdev->cmd_q);
1714
1715 /* Avoid potential lockdep warnings from the *_flush() calls by
1716 * ensuring the workqueue is empty up front.
1717 */
1718 drain_workqueue(hdev->workqueue);
1719
1720 hci_dev_lock(hdev);
1721 hci_inquiry_cache_flush(hdev);
1722 hci_conn_hash_flush(hdev);
1723 hci_dev_unlock(hdev);
1724
1725 if (hdev->flush)
1726 hdev->flush(hdev);
1727
1728 atomic_set(&hdev->cmd_cnt, 1);
1729 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1730
1731 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1732
1733 hci_req_unlock(hdev);
1734 return ret;
1735 }
1736
1737 int hci_dev_reset(__u16 dev)
1738 {
1739 struct hci_dev *hdev;
1740 int err;
1741
1742 hdev = hci_dev_get(dev);
1743 if (!hdev)
1744 return -ENODEV;
1745
1746 if (!test_bit(HCI_UP, &hdev->flags)) {
1747 err = -ENETDOWN;
1748 goto done;
1749 }
1750
1751 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1752 err = -EBUSY;
1753 goto done;
1754 }
1755
1756 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1757 err = -EOPNOTSUPP;
1758 goto done;
1759 }
1760
1761 err = hci_dev_do_reset(hdev);
1762
1763 done:
1764 hci_dev_put(hdev);
1765 return err;
1766 }
1767
1768 int hci_dev_reset_stat(__u16 dev)
1769 {
1770 struct hci_dev *hdev;
1771 int ret = 0;
1772
1773 hdev = hci_dev_get(dev);
1774 if (!hdev)
1775 return -ENODEV;
1776
1777 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1778 ret = -EBUSY;
1779 goto done;
1780 }
1781
1782 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1783 ret = -EOPNOTSUPP;
1784 goto done;
1785 }
1786
1787 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1788
1789 done:
1790 hci_dev_put(hdev);
1791 return ret;
1792 }
1793
1794 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1795 {
1796 bool conn_changed, discov_changed;
1797
1798 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1799
1800 if ((scan & SCAN_PAGE))
1801 conn_changed = !hci_dev_test_and_set_flag(hdev,
1802 HCI_CONNECTABLE);
1803 else
1804 conn_changed = hci_dev_test_and_clear_flag(hdev,
1805 HCI_CONNECTABLE);
1806
1807 if ((scan & SCAN_INQUIRY)) {
1808 discov_changed = !hci_dev_test_and_set_flag(hdev,
1809 HCI_DISCOVERABLE);
1810 } else {
1811 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1812 discov_changed = hci_dev_test_and_clear_flag(hdev,
1813 HCI_DISCOVERABLE);
1814 }
1815
1816 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1817 return;
1818
1819 if (conn_changed || discov_changed) {
1820 /* In case this was disabled through mgmt */
1821 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1822
1823 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1824 mgmt_update_adv_data(hdev);
1825
1826 mgmt_new_settings(hdev);
1827 }
1828 }
1829
1830 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1831 {
1832 struct hci_dev *hdev;
1833 struct hci_dev_req dr;
1834 int err = 0;
1835
1836 if (copy_from_user(&dr, arg, sizeof(dr)))
1837 return -EFAULT;
1838
1839 hdev = hci_dev_get(dr.dev_id);
1840 if (!hdev)
1841 return -ENODEV;
1842
1843 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1844 err = -EBUSY;
1845 goto done;
1846 }
1847
1848 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1849 err = -EOPNOTSUPP;
1850 goto done;
1851 }
1852
1853 if (hdev->dev_type != HCI_BREDR) {
1854 err = -EOPNOTSUPP;
1855 goto done;
1856 }
1857
1858 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1859 err = -EOPNOTSUPP;
1860 goto done;
1861 }
1862
1863 switch (cmd) {
1864 case HCISETAUTH:
1865 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1866 HCI_INIT_TIMEOUT);
1867 break;
1868
1869 case HCISETENCRYPT:
1870 if (!lmp_encrypt_capable(hdev)) {
1871 err = -EOPNOTSUPP;
1872 break;
1873 }
1874
1875 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1876 /* Auth must be enabled first */
1877 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1878 HCI_INIT_TIMEOUT);
1879 if (err)
1880 break;
1881 }
1882
1883 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1884 HCI_INIT_TIMEOUT);
1885 break;
1886
1887 case HCISETSCAN:
1888 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1889 HCI_INIT_TIMEOUT);
1890
1891 /* Ensure that the connectable and discoverable states
1892 * get correctly modified as this was a non-mgmt change.
1893 */
1894 if (!err)
1895 hci_update_scan_state(hdev, dr.dev_opt);
1896 break;
1897
1898 case HCISETLINKPOL:
1899 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1900 HCI_INIT_TIMEOUT);
1901 break;
1902
1903 case HCISETLINKMODE:
1904 hdev->link_mode = ((__u16) dr.dev_opt) &
1905 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1906 break;
1907
1908 case HCISETPTYPE:
1909 hdev->pkt_type = (__u16) dr.dev_opt;
1910 break;
1911
1912 case HCISETACLMTU:
1913 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1914 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1915 break;
1916
1917 case HCISETSCOMTU:
1918 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1919 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1920 break;
1921
1922 default:
1923 err = -EINVAL;
1924 break;
1925 }
1926
1927 done:
1928 hci_dev_put(hdev);
1929 return err;
1930 }
1931
1932 int hci_get_dev_list(void __user *arg)
1933 {
1934 struct hci_dev *hdev;
1935 struct hci_dev_list_req *dl;
1936 struct hci_dev_req *dr;
1937 int n = 0, size, err;
1938 __u16 dev_num;
1939
1940 if (get_user(dev_num, (__u16 __user *) arg))
1941 return -EFAULT;
1942
1943 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1944 return -EINVAL;
1945
1946 size = sizeof(*dl) + dev_num * sizeof(*dr);
1947
1948 dl = kzalloc(size, GFP_KERNEL);
1949 if (!dl)
1950 return -ENOMEM;
1951
1952 dr = dl->dev_req;
1953
1954 read_lock(&hci_dev_list_lock);
1955 list_for_each_entry(hdev, &hci_dev_list, list) {
1956 unsigned long flags = hdev->flags;
1957
1958 /* When the auto-off is configured it means the transport
1959 * is running, but in that case still indicate that the
1960 * device is actually down.
1961 */
1962 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1963 flags &= ~BIT(HCI_UP);
1964
1965 (dr + n)->dev_id = hdev->id;
1966 (dr + n)->dev_opt = flags;
1967
1968 if (++n >= dev_num)
1969 break;
1970 }
1971 read_unlock(&hci_dev_list_lock);
1972
1973 dl->dev_num = n;
1974 size = sizeof(*dl) + n * sizeof(*dr);
1975
1976 err = copy_to_user(arg, dl, size);
1977 kfree(dl);
1978
1979 return err ? -EFAULT : 0;
1980 }
1981
1982 int hci_get_dev_info(void __user *arg)
1983 {
1984 struct hci_dev *hdev;
1985 struct hci_dev_info di;
1986 unsigned long flags;
1987 int err = 0;
1988
1989 if (copy_from_user(&di, arg, sizeof(di)))
1990 return -EFAULT;
1991
1992 hdev = hci_dev_get(di.dev_id);
1993 if (!hdev)
1994 return -ENODEV;
1995
1996 /* When the auto-off is configured it means the transport
1997 * is running, but in that case still indicate that the
1998 * device is actually down.
1999 */
2000 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2001 flags = hdev->flags & ~BIT(HCI_UP);
2002 else
2003 flags = hdev->flags;
2004
2005 strcpy(di.name, hdev->name);
2006 di.bdaddr = hdev->bdaddr;
2007 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2008 di.flags = flags;
2009 di.pkt_type = hdev->pkt_type;
2010 if (lmp_bredr_capable(hdev)) {
2011 di.acl_mtu = hdev->acl_mtu;
2012 di.acl_pkts = hdev->acl_pkts;
2013 di.sco_mtu = hdev->sco_mtu;
2014 di.sco_pkts = hdev->sco_pkts;
2015 } else {
2016 di.acl_mtu = hdev->le_mtu;
2017 di.acl_pkts = hdev->le_pkts;
2018 di.sco_mtu = 0;
2019 di.sco_pkts = 0;
2020 }
2021 di.link_policy = hdev->link_policy;
2022 di.link_mode = hdev->link_mode;
2023
2024 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2025 memcpy(&di.features, &hdev->features, sizeof(di.features));
2026
2027 if (copy_to_user(arg, &di, sizeof(di)))
2028 err = -EFAULT;
2029
2030 hci_dev_put(hdev);
2031
2032 return err;
2033 }
2034
2035 /* ---- Interface to HCI drivers ---- */
2036
2037 static int hci_rfkill_set_block(void *data, bool blocked)
2038 {
2039 struct hci_dev *hdev = data;
2040
2041 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2042
2043 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2044 return -EBUSY;
2045
2046 if (blocked) {
2047 hci_dev_set_flag(hdev, HCI_RFKILLED);
2048 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2049 !hci_dev_test_flag(hdev, HCI_CONFIG))
2050 hci_dev_do_close(hdev);
2051 } else {
2052 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2053 }
2054
2055 return 0;
2056 }
2057
2058 static const struct rfkill_ops hci_rfkill_ops = {
2059 .set_block = hci_rfkill_set_block,
2060 };
2061
2062 static void hci_power_on(struct work_struct *work)
2063 {
2064 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2065 int err;
2066
2067 BT_DBG("%s", hdev->name);
2068
2069 err = hci_dev_do_open(hdev);
2070 if (err < 0) {
2071 hci_dev_lock(hdev);
2072 mgmt_set_powered_failed(hdev, err);
2073 hci_dev_unlock(hdev);
2074 return;
2075 }
2076
2077 /* During the HCI setup phase, a few error conditions are
2078 * ignored and they need to be checked now. If they are still
2079 * valid, it is important to turn the device back off.
2080 */
2081 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2082 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2083 (hdev->dev_type == HCI_BREDR &&
2084 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2085 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2086 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2087 hci_dev_do_close(hdev);
2088 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2089 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2090 HCI_AUTO_OFF_TIMEOUT);
2091 }
2092
2093 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2094 /* For unconfigured devices, set the HCI_RAW flag
2095 * so that userspace can easily identify them.
2096 */
2097 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2098 set_bit(HCI_RAW, &hdev->flags);
2099
2100 /* For fully configured devices, this will send
2101 * the Index Added event. For unconfigured devices,
2102 * it will send Unconfigued Index Added event.
2103 *
2104 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2105 * and no event will be send.
2106 */
2107 mgmt_index_added(hdev);
2108 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2109 /* When the controller is now configured, then it
2110 * is important to clear the HCI_RAW flag.
2111 */
2112 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2113 clear_bit(HCI_RAW, &hdev->flags);
2114
2115 /* Powering on the controller with HCI_CONFIG set only
2116 * happens with the transition from unconfigured to
2117 * configured. This will send the Index Added event.
2118 */
2119 mgmt_index_added(hdev);
2120 }
2121 }
2122
2123 static void hci_power_off(struct work_struct *work)
2124 {
2125 struct hci_dev *hdev = container_of(work, struct hci_dev,
2126 power_off.work);
2127
2128 BT_DBG("%s", hdev->name);
2129
2130 hci_dev_do_close(hdev);
2131 }
2132
2133 static void hci_error_reset(struct work_struct *work)
2134 {
2135 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2136
2137 BT_DBG("%s", hdev->name);
2138
2139 if (hdev->hw_error)
2140 hdev->hw_error(hdev, hdev->hw_error_code);
2141 else
2142 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2143 hdev->hw_error_code);
2144
2145 if (hci_dev_do_close(hdev))
2146 return;
2147
2148 hci_dev_do_open(hdev);
2149 }
2150
2151 static void hci_discov_off(struct work_struct *work)
2152 {
2153 struct hci_dev *hdev;
2154
2155 hdev = container_of(work, struct hci_dev, discov_off.work);
2156
2157 BT_DBG("%s", hdev->name);
2158
2159 mgmt_discoverable_timeout(hdev);
2160 }
2161
2162 static void hci_adv_timeout_expire(struct work_struct *work)
2163 {
2164 struct hci_dev *hdev;
2165
2166 hdev = container_of(work, struct hci_dev, adv_instance_expire.work);
2167
2168 BT_DBG("%s", hdev->name);
2169
2170 mgmt_adv_timeout_expired(hdev);
2171 }
2172
2173 void hci_uuids_clear(struct hci_dev *hdev)
2174 {
2175 struct bt_uuid *uuid, *tmp;
2176
2177 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2178 list_del(&uuid->list);
2179 kfree(uuid);
2180 }
2181 }
2182
2183 void hci_link_keys_clear(struct hci_dev *hdev)
2184 {
2185 struct link_key *key;
2186
2187 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2188 list_del_rcu(&key->list);
2189 kfree_rcu(key, rcu);
2190 }
2191 }
2192
2193 void hci_smp_ltks_clear(struct hci_dev *hdev)
2194 {
2195 struct smp_ltk *k;
2196
2197 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2198 list_del_rcu(&k->list);
2199 kfree_rcu(k, rcu);
2200 }
2201 }
2202
2203 void hci_smp_irks_clear(struct hci_dev *hdev)
2204 {
2205 struct smp_irk *k;
2206
2207 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2208 list_del_rcu(&k->list);
2209 kfree_rcu(k, rcu);
2210 }
2211 }
2212
2213 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2214 {
2215 struct link_key *k;
2216
2217 rcu_read_lock();
2218 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2219 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2220 rcu_read_unlock();
2221 return k;
2222 }
2223 }
2224 rcu_read_unlock();
2225
2226 return NULL;
2227 }
2228
2229 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2230 u8 key_type, u8 old_key_type)
2231 {
2232 /* Legacy key */
2233 if (key_type < 0x03)
2234 return true;
2235
2236 /* Debug keys are insecure so don't store them persistently */
2237 if (key_type == HCI_LK_DEBUG_COMBINATION)
2238 return false;
2239
2240 /* Changed combination key and there's no previous one */
2241 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2242 return false;
2243
2244 /* Security mode 3 case */
2245 if (!conn)
2246 return true;
2247
2248 /* BR/EDR key derived using SC from an LE link */
2249 if (conn->type == LE_LINK)
2250 return true;
2251
2252 /* Neither local nor remote side had no-bonding as requirement */
2253 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2254 return true;
2255
2256 /* Local side had dedicated bonding as requirement */
2257 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2258 return true;
2259
2260 /* Remote side had dedicated bonding as requirement */
2261 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2262 return true;
2263
2264 /* If none of the above criteria match, then don't store the key
2265 * persistently */
2266 return false;
2267 }
2268
2269 static u8 ltk_role(u8 type)
2270 {
2271 if (type == SMP_LTK)
2272 return HCI_ROLE_MASTER;
2273
2274 return HCI_ROLE_SLAVE;
2275 }
2276
2277 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2278 u8 addr_type, u8 role)
2279 {
2280 struct smp_ltk *k;
2281
2282 rcu_read_lock();
2283 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2284 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2285 continue;
2286
2287 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2288 rcu_read_unlock();
2289 return k;
2290 }
2291 }
2292 rcu_read_unlock();
2293
2294 return NULL;
2295 }
2296
2297 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2298 {
2299 struct smp_irk *irk;
2300
2301 rcu_read_lock();
2302 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2303 if (!bacmp(&irk->rpa, rpa)) {
2304 rcu_read_unlock();
2305 return irk;
2306 }
2307 }
2308
2309 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2310 if (smp_irk_matches(hdev, irk->val, rpa)) {
2311 bacpy(&irk->rpa, rpa);
2312 rcu_read_unlock();
2313 return irk;
2314 }
2315 }
2316 rcu_read_unlock();
2317
2318 return NULL;
2319 }
2320
2321 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2322 u8 addr_type)
2323 {
2324 struct smp_irk *irk;
2325
2326 /* Identity Address must be public or static random */
2327 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2328 return NULL;
2329
2330 rcu_read_lock();
2331 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2332 if (addr_type == irk->addr_type &&
2333 bacmp(bdaddr, &irk->bdaddr) == 0) {
2334 rcu_read_unlock();
2335 return irk;
2336 }
2337 }
2338 rcu_read_unlock();
2339
2340 return NULL;
2341 }
2342
2343 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2344 bdaddr_t *bdaddr, u8 *val, u8 type,
2345 u8 pin_len, bool *persistent)
2346 {
2347 struct link_key *key, *old_key;
2348 u8 old_key_type;
2349
2350 old_key = hci_find_link_key(hdev, bdaddr);
2351 if (old_key) {
2352 old_key_type = old_key->type;
2353 key = old_key;
2354 } else {
2355 old_key_type = conn ? conn->key_type : 0xff;
2356 key = kzalloc(sizeof(*key), GFP_KERNEL);
2357 if (!key)
2358 return NULL;
2359 list_add_rcu(&key->list, &hdev->link_keys);
2360 }
2361
2362 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2363
2364 /* Some buggy controller combinations generate a changed
2365 * combination key for legacy pairing even when there's no
2366 * previous key */
2367 if (type == HCI_LK_CHANGED_COMBINATION &&
2368 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2369 type = HCI_LK_COMBINATION;
2370 if (conn)
2371 conn->key_type = type;
2372 }
2373
2374 bacpy(&key->bdaddr, bdaddr);
2375 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2376 key->pin_len = pin_len;
2377
2378 if (type == HCI_LK_CHANGED_COMBINATION)
2379 key->type = old_key_type;
2380 else
2381 key->type = type;
2382
2383 if (persistent)
2384 *persistent = hci_persistent_key(hdev, conn, type,
2385 old_key_type);
2386
2387 return key;
2388 }
2389
2390 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2391 u8 addr_type, u8 type, u8 authenticated,
2392 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2393 {
2394 struct smp_ltk *key, *old_key;
2395 u8 role = ltk_role(type);
2396
2397 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2398 if (old_key)
2399 key = old_key;
2400 else {
2401 key = kzalloc(sizeof(*key), GFP_KERNEL);
2402 if (!key)
2403 return NULL;
2404 list_add_rcu(&key->list, &hdev->long_term_keys);
2405 }
2406
2407 bacpy(&key->bdaddr, bdaddr);
2408 key->bdaddr_type = addr_type;
2409 memcpy(key->val, tk, sizeof(key->val));
2410 key->authenticated = authenticated;
2411 key->ediv = ediv;
2412 key->rand = rand;
2413 key->enc_size = enc_size;
2414 key->type = type;
2415
2416 return key;
2417 }
2418
2419 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2420 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2421 {
2422 struct smp_irk *irk;
2423
2424 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2425 if (!irk) {
2426 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2427 if (!irk)
2428 return NULL;
2429
2430 bacpy(&irk->bdaddr, bdaddr);
2431 irk->addr_type = addr_type;
2432
2433 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2434 }
2435
2436 memcpy(irk->val, val, 16);
2437 bacpy(&irk->rpa, rpa);
2438
2439 return irk;
2440 }
2441
2442 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2443 {
2444 struct link_key *key;
2445
2446 key = hci_find_link_key(hdev, bdaddr);
2447 if (!key)
2448 return -ENOENT;
2449
2450 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2451
2452 list_del_rcu(&key->list);
2453 kfree_rcu(key, rcu);
2454
2455 return 0;
2456 }
2457
2458 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2459 {
2460 struct smp_ltk *k;
2461 int removed = 0;
2462
2463 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2464 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2465 continue;
2466
2467 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2468
2469 list_del_rcu(&k->list);
2470 kfree_rcu(k, rcu);
2471 removed++;
2472 }
2473
2474 return removed ? 0 : -ENOENT;
2475 }
2476
2477 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2478 {
2479 struct smp_irk *k;
2480
2481 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2482 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2483 continue;
2484
2485 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2486
2487 list_del_rcu(&k->list);
2488 kfree_rcu(k, rcu);
2489 }
2490 }
2491
2492 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2493 {
2494 struct smp_ltk *k;
2495 struct smp_irk *irk;
2496 u8 addr_type;
2497
2498 if (type == BDADDR_BREDR) {
2499 if (hci_find_link_key(hdev, bdaddr))
2500 return true;
2501 return false;
2502 }
2503
2504 /* Convert to HCI addr type which struct smp_ltk uses */
2505 if (type == BDADDR_LE_PUBLIC)
2506 addr_type = ADDR_LE_DEV_PUBLIC;
2507 else
2508 addr_type = ADDR_LE_DEV_RANDOM;
2509
2510 irk = hci_get_irk(hdev, bdaddr, addr_type);
2511 if (irk) {
2512 bdaddr = &irk->bdaddr;
2513 addr_type = irk->addr_type;
2514 }
2515
2516 rcu_read_lock();
2517 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2518 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2519 rcu_read_unlock();
2520 return true;
2521 }
2522 }
2523 rcu_read_unlock();
2524
2525 return false;
2526 }
2527
2528 /* HCI command timer function */
2529 static void hci_cmd_timeout(struct work_struct *work)
2530 {
2531 struct hci_dev *hdev = container_of(work, struct hci_dev,
2532 cmd_timer.work);
2533
2534 if (hdev->sent_cmd) {
2535 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2536 u16 opcode = __le16_to_cpu(sent->opcode);
2537
2538 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2539 } else {
2540 BT_ERR("%s command tx timeout", hdev->name);
2541 }
2542
2543 atomic_set(&hdev->cmd_cnt, 1);
2544 queue_work(hdev->workqueue, &hdev->cmd_work);
2545 }
2546
2547 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2548 bdaddr_t *bdaddr, u8 bdaddr_type)
2549 {
2550 struct oob_data *data;
2551
2552 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2553 if (bacmp(bdaddr, &data->bdaddr) != 0)
2554 continue;
2555 if (data->bdaddr_type != bdaddr_type)
2556 continue;
2557 return data;
2558 }
2559
2560 return NULL;
2561 }
2562
2563 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2564 u8 bdaddr_type)
2565 {
2566 struct oob_data *data;
2567
2568 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2569 if (!data)
2570 return -ENOENT;
2571
2572 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2573
2574 list_del(&data->list);
2575 kfree(data);
2576
2577 return 0;
2578 }
2579
2580 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2581 {
2582 struct oob_data *data, *n;
2583
2584 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2585 list_del(&data->list);
2586 kfree(data);
2587 }
2588 }
2589
2590 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2591 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2592 u8 *hash256, u8 *rand256)
2593 {
2594 struct oob_data *data;
2595
2596 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2597 if (!data) {
2598 data = kmalloc(sizeof(*data), GFP_KERNEL);
2599 if (!data)
2600 return -ENOMEM;
2601
2602 bacpy(&data->bdaddr, bdaddr);
2603 data->bdaddr_type = bdaddr_type;
2604 list_add(&data->list, &hdev->remote_oob_data);
2605 }
2606
2607 if (hash192 && rand192) {
2608 memcpy(data->hash192, hash192, sizeof(data->hash192));
2609 memcpy(data->rand192, rand192, sizeof(data->rand192));
2610 if (hash256 && rand256)
2611 data->present = 0x03;
2612 } else {
2613 memset(data->hash192, 0, sizeof(data->hash192));
2614 memset(data->rand192, 0, sizeof(data->rand192));
2615 if (hash256 && rand256)
2616 data->present = 0x02;
2617 else
2618 data->present = 0x00;
2619 }
2620
2621 if (hash256 && rand256) {
2622 memcpy(data->hash256, hash256, sizeof(data->hash256));
2623 memcpy(data->rand256, rand256, sizeof(data->rand256));
2624 } else {
2625 memset(data->hash256, 0, sizeof(data->hash256));
2626 memset(data->rand256, 0, sizeof(data->rand256));
2627 if (hash192 && rand192)
2628 data->present = 0x01;
2629 }
2630
2631 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2632
2633 return 0;
2634 }
2635
2636 /* This function requires the caller holds hdev->lock */
2637 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2638 {
2639 struct adv_info *adv_instance;
2640
2641 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2642 if (adv_instance->instance == instance)
2643 return adv_instance;
2644 }
2645
2646 return NULL;
2647 }
2648
2649 /* This function requires the caller holds hdev->lock */
2650 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance) {
2651 struct adv_info *cur_instance;
2652
2653 cur_instance = hci_find_adv_instance(hdev, instance);
2654 if (!cur_instance)
2655 return NULL;
2656
2657 if (cur_instance == list_last_entry(&hdev->adv_instances,
2658 struct adv_info, list))
2659 return list_first_entry(&hdev->adv_instances,
2660 struct adv_info, list);
2661 else
2662 return list_next_entry(cur_instance, list);
2663 }
2664
2665 /* This function requires the caller holds hdev->lock */
2666 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2667 {
2668 struct adv_info *adv_instance;
2669
2670 adv_instance = hci_find_adv_instance(hdev, instance);
2671 if (!adv_instance)
2672 return -ENOENT;
2673
2674 BT_DBG("%s removing %dMR", hdev->name, instance);
2675
2676 if (hdev->cur_adv_instance == instance && hdev->adv_instance_timeout) {
2677 cancel_delayed_work(&hdev->adv_instance_expire);
2678 hdev->adv_instance_timeout = 0;
2679 }
2680
2681 list_del(&adv_instance->list);
2682 kfree(adv_instance);
2683
2684 hdev->adv_instance_cnt--;
2685
2686 return 0;
2687 }
2688
2689 /* This function requires the caller holds hdev->lock */
2690 void hci_adv_instances_clear(struct hci_dev *hdev)
2691 {
2692 struct adv_info *adv_instance, *n;
2693
2694 if (hdev->adv_instance_timeout) {
2695 cancel_delayed_work(&hdev->adv_instance_expire);
2696 hdev->adv_instance_timeout = 0;
2697 }
2698
2699 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2700 list_del(&adv_instance->list);
2701 kfree(adv_instance);
2702 }
2703
2704 hdev->adv_instance_cnt = 0;
2705 }
2706
2707 /* This function requires the caller holds hdev->lock */
2708 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2709 u16 adv_data_len, u8 *adv_data,
2710 u16 scan_rsp_len, u8 *scan_rsp_data,
2711 u16 timeout, u16 duration)
2712 {
2713 struct adv_info *adv_instance;
2714
2715 adv_instance = hci_find_adv_instance(hdev, instance);
2716 if (adv_instance) {
2717 memset(adv_instance->adv_data, 0,
2718 sizeof(adv_instance->adv_data));
2719 memset(adv_instance->scan_rsp_data, 0,
2720 sizeof(adv_instance->scan_rsp_data));
2721 } else {
2722 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2723 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2724 return -EOVERFLOW;
2725
2726 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2727 if (!adv_instance)
2728 return -ENOMEM;
2729
2730 adv_instance->pending = true;
2731 adv_instance->instance = instance;
2732 list_add(&adv_instance->list, &hdev->adv_instances);
2733 hdev->adv_instance_cnt++;
2734 }
2735
2736 adv_instance->flags = flags;
2737 adv_instance->adv_data_len = adv_data_len;
2738 adv_instance->scan_rsp_len = scan_rsp_len;
2739
2740 if (adv_data_len)
2741 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2742
2743 if (scan_rsp_len)
2744 memcpy(adv_instance->scan_rsp_data,
2745 scan_rsp_data, scan_rsp_len);
2746
2747 adv_instance->timeout = timeout;
2748 adv_instance->remaining_time = timeout;
2749
2750 if (duration == 0)
2751 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2752 else
2753 adv_instance->duration = duration;
2754
2755 BT_DBG("%s for %dMR", hdev->name, instance);
2756
2757 return 0;
2758 }
2759
2760 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2761 bdaddr_t *bdaddr, u8 type)
2762 {
2763 struct bdaddr_list *b;
2764
2765 list_for_each_entry(b, bdaddr_list, list) {
2766 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2767 return b;
2768 }
2769
2770 return NULL;
2771 }
2772
2773 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2774 {
2775 struct list_head *p, *n;
2776
2777 list_for_each_safe(p, n, bdaddr_list) {
2778 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
2779
2780 list_del(p);
2781 kfree(b);
2782 }
2783 }
2784
2785 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2786 {
2787 struct bdaddr_list *entry;
2788
2789 if (!bacmp(bdaddr, BDADDR_ANY))
2790 return -EBADF;
2791
2792 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2793 return -EEXIST;
2794
2795 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2796 if (!entry)
2797 return -ENOMEM;
2798
2799 bacpy(&entry->bdaddr, bdaddr);
2800 entry->bdaddr_type = type;
2801
2802 list_add(&entry->list, list);
2803
2804 return 0;
2805 }
2806
2807 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2808 {
2809 struct bdaddr_list *entry;
2810
2811 if (!bacmp(bdaddr, BDADDR_ANY)) {
2812 hci_bdaddr_list_clear(list);
2813 return 0;
2814 }
2815
2816 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2817 if (!entry)
2818 return -ENOENT;
2819
2820 list_del(&entry->list);
2821 kfree(entry);
2822
2823 return 0;
2824 }
2825
2826 /* This function requires the caller holds hdev->lock */
2827 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2828 bdaddr_t *addr, u8 addr_type)
2829 {
2830 struct hci_conn_params *params;
2831
2832 list_for_each_entry(params, &hdev->le_conn_params, list) {
2833 if (bacmp(&params->addr, addr) == 0 &&
2834 params->addr_type == addr_type) {
2835 return params;
2836 }
2837 }
2838
2839 return NULL;
2840 }
2841
2842 /* This function requires the caller holds hdev->lock */
2843 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2844 bdaddr_t *addr, u8 addr_type)
2845 {
2846 struct hci_conn_params *param;
2847
2848 list_for_each_entry(param, list, action) {
2849 if (bacmp(&param->addr, addr) == 0 &&
2850 param->addr_type == addr_type)
2851 return param;
2852 }
2853
2854 return NULL;
2855 }
2856
2857 /* This function requires the caller holds hdev->lock */
2858 struct hci_conn_params *hci_explicit_connect_lookup(struct hci_dev *hdev,
2859 bdaddr_t *addr,
2860 u8 addr_type)
2861 {
2862 struct hci_conn_params *param;
2863
2864 list_for_each_entry(param, &hdev->pend_le_conns, action) {
2865 if (bacmp(&param->addr, addr) == 0 &&
2866 param->addr_type == addr_type &&
2867 param->explicit_connect)
2868 return param;
2869 }
2870
2871 list_for_each_entry(param, &hdev->pend_le_reports, action) {
2872 if (bacmp(&param->addr, addr) == 0 &&
2873 param->addr_type == addr_type &&
2874 param->explicit_connect)
2875 return param;
2876 }
2877
2878 return NULL;
2879 }
2880
2881 /* This function requires the caller holds hdev->lock */
2882 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2883 bdaddr_t *addr, u8 addr_type)
2884 {
2885 struct hci_conn_params *params;
2886
2887 params = hci_conn_params_lookup(hdev, addr, addr_type);
2888 if (params)
2889 return params;
2890
2891 params = kzalloc(sizeof(*params), GFP_KERNEL);
2892 if (!params) {
2893 BT_ERR("Out of memory");
2894 return NULL;
2895 }
2896
2897 bacpy(&params->addr, addr);
2898 params->addr_type = addr_type;
2899
2900 list_add(&params->list, &hdev->le_conn_params);
2901 INIT_LIST_HEAD(&params->action);
2902
2903 params->conn_min_interval = hdev->le_conn_min_interval;
2904 params->conn_max_interval = hdev->le_conn_max_interval;
2905 params->conn_latency = hdev->le_conn_latency;
2906 params->supervision_timeout = hdev->le_supv_timeout;
2907 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2908
2909 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2910
2911 return params;
2912 }
2913
2914 static void hci_conn_params_free(struct hci_conn_params *params)
2915 {
2916 if (params->conn) {
2917 hci_conn_drop(params->conn);
2918 hci_conn_put(params->conn);
2919 }
2920
2921 list_del(&params->action);
2922 list_del(&params->list);
2923 kfree(params);
2924 }
2925
2926 /* This function requires the caller holds hdev->lock */
2927 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2928 {
2929 struct hci_conn_params *params;
2930
2931 params = hci_conn_params_lookup(hdev, addr, addr_type);
2932 if (!params)
2933 return;
2934
2935 hci_conn_params_free(params);
2936
2937 hci_update_background_scan(hdev);
2938
2939 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2940 }
2941
2942 /* This function requires the caller holds hdev->lock */
2943 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2944 {
2945 struct hci_conn_params *params, *tmp;
2946
2947 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2948 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2949 continue;
2950
2951 /* If trying to estabilish one time connection to disabled
2952 * device, leave the params, but mark them as just once.
2953 */
2954 if (params->explicit_connect) {
2955 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2956 continue;
2957 }
2958
2959 list_del(&params->list);
2960 kfree(params);
2961 }
2962
2963 BT_DBG("All LE disabled connection parameters were removed");
2964 }
2965
2966 /* This function requires the caller holds hdev->lock */
2967 void hci_conn_params_clear_all(struct hci_dev *hdev)
2968 {
2969 struct hci_conn_params *params, *tmp;
2970
2971 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2972 hci_conn_params_free(params);
2973
2974 hci_update_background_scan(hdev);
2975
2976 BT_DBG("All LE connection parameters were removed");
2977 }
2978
2979 static void inquiry_complete(struct hci_dev *hdev, u8 status, u16 opcode)
2980 {
2981 if (status) {
2982 BT_ERR("Failed to start inquiry: status %d", status);
2983
2984 hci_dev_lock(hdev);
2985 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2986 hci_dev_unlock(hdev);
2987 return;
2988 }
2989 }
2990
2991 static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
2992 u16 opcode)
2993 {
2994 /* General inquiry access code (GIAC) */
2995 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2996 struct hci_cp_inquiry cp;
2997 int err;
2998
2999 if (status) {
3000 BT_ERR("Failed to disable LE scanning: status %d", status);
3001 return;
3002 }
3003
3004 hdev->discovery.scan_start = 0;
3005
3006 switch (hdev->discovery.type) {
3007 case DISCOV_TYPE_LE:
3008 hci_dev_lock(hdev);
3009 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3010 hci_dev_unlock(hdev);
3011 break;
3012
3013 case DISCOV_TYPE_INTERLEAVED:
3014 hci_dev_lock(hdev);
3015
3016 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
3017 &hdev->quirks)) {
3018 /* If we were running LE only scan, change discovery
3019 * state. If we were running both LE and BR/EDR inquiry
3020 * simultaneously, and BR/EDR inquiry is already
3021 * finished, stop discovery, otherwise BR/EDR inquiry
3022 * will stop discovery when finished. If we will resolve
3023 * remote device name, do not change discovery state.
3024 */
3025 if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
3026 hdev->discovery.state != DISCOVERY_RESOLVING)
3027 hci_discovery_set_state(hdev,
3028 DISCOVERY_STOPPED);
3029 } else {
3030 struct hci_request req;
3031
3032 hci_inquiry_cache_flush(hdev);
3033
3034 hci_req_init(&req, hdev);
3035
3036 memset(&cp, 0, sizeof(cp));
3037 memcpy(&cp.lap, lap, sizeof(cp.lap));
3038 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
3039 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
3040
3041 err = hci_req_run(&req, inquiry_complete);
3042 if (err) {
3043 BT_ERR("Inquiry request failed: err %d", err);
3044 hci_discovery_set_state(hdev,
3045 DISCOVERY_STOPPED);
3046 }
3047 }
3048
3049 hci_dev_unlock(hdev);
3050 break;
3051 }
3052 }
3053
3054 static void le_scan_disable_work(struct work_struct *work)
3055 {
3056 struct hci_dev *hdev = container_of(work, struct hci_dev,
3057 le_scan_disable.work);
3058 struct hci_request req;
3059 int err;
3060
3061 BT_DBG("%s", hdev->name);
3062
3063 cancel_delayed_work_sync(&hdev->le_scan_restart);
3064
3065 hci_req_init(&req, hdev);
3066
3067 hci_req_add_le_scan_disable(&req);
3068
3069 err = hci_req_run(&req, le_scan_disable_work_complete);
3070 if (err)
3071 BT_ERR("Disable LE scanning request failed: err %d", err);
3072 }
3073
3074 static void le_scan_restart_work_complete(struct hci_dev *hdev, u8 status,
3075 u16 opcode)
3076 {
3077 unsigned long timeout, duration, scan_start, now;
3078
3079 BT_DBG("%s", hdev->name);
3080
3081 if (status) {
3082 BT_ERR("Failed to restart LE scan: status %d", status);
3083 return;
3084 }
3085
3086 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
3087 !hdev->discovery.scan_start)
3088 return;
3089
3090 /* When the scan was started, hdev->le_scan_disable has been queued
3091 * after duration from scan_start. During scan restart this job
3092 * has been canceled, and we need to queue it again after proper
3093 * timeout, to make sure that scan does not run indefinitely.
3094 */
3095 duration = hdev->discovery.scan_duration;
3096 scan_start = hdev->discovery.scan_start;
3097 now = jiffies;
3098 if (now - scan_start <= duration) {
3099 int elapsed;
3100
3101 if (now >= scan_start)
3102 elapsed = now - scan_start;
3103 else
3104 elapsed = ULONG_MAX - scan_start + now;
3105
3106 timeout = duration - elapsed;
3107 } else {
3108 timeout = 0;
3109 }
3110 queue_delayed_work(hdev->workqueue,
3111 &hdev->le_scan_disable, timeout);
3112 }
3113
3114 static void le_scan_restart_work(struct work_struct *work)
3115 {
3116 struct hci_dev *hdev = container_of(work, struct hci_dev,
3117 le_scan_restart.work);
3118 struct hci_request req;
3119 struct hci_cp_le_set_scan_enable cp;
3120 int err;
3121
3122 BT_DBG("%s", hdev->name);
3123
3124 /* If controller is not scanning we are done. */
3125 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
3126 return;
3127
3128 hci_req_init(&req, hdev);
3129
3130 hci_req_add_le_scan_disable(&req);
3131
3132 memset(&cp, 0, sizeof(cp));
3133 cp.enable = LE_SCAN_ENABLE;
3134 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
3135 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
3136
3137 err = hci_req_run(&req, le_scan_restart_work_complete);
3138 if (err)
3139 BT_ERR("Restart LE scan request failed: err %d", err);
3140 }
3141
3142 /* Copy the Identity Address of the controller.
3143 *
3144 * If the controller has a public BD_ADDR, then by default use that one.
3145 * If this is a LE only controller without a public address, default to
3146 * the static random address.
3147 *
3148 * For debugging purposes it is possible to force controllers with a
3149 * public address to use the static random address instead.
3150 *
3151 * In case BR/EDR has been disabled on a dual-mode controller and
3152 * userspace has configured a static address, then that address
3153 * becomes the identity address instead of the public BR/EDR address.
3154 */
3155 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3156 u8 *bdaddr_type)
3157 {
3158 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3159 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3160 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3161 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3162 bacpy(bdaddr, &hdev->static_addr);
3163 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3164 } else {
3165 bacpy(bdaddr, &hdev->bdaddr);
3166 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3167 }
3168 }
3169
3170 /* Alloc HCI device */
3171 struct hci_dev *hci_alloc_dev(void)
3172 {
3173 struct hci_dev *hdev;
3174
3175 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3176 if (!hdev)
3177 return NULL;
3178
3179 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3180 hdev->esco_type = (ESCO_HV1);
3181 hdev->link_mode = (HCI_LM_ACCEPT);
3182 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3183 hdev->io_capability = 0x03; /* No Input No Output */
3184 hdev->manufacturer = 0xffff; /* Default to internal use */
3185 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3186 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3187 hdev->adv_instance_cnt = 0;
3188 hdev->cur_adv_instance = 0x00;
3189 hdev->adv_instance_timeout = 0;
3190
3191 hdev->sniff_max_interval = 800;
3192 hdev->sniff_min_interval = 80;
3193
3194 hdev->le_adv_channel_map = 0x07;
3195 hdev->le_adv_min_interval = 0x0800;
3196 hdev->le_adv_max_interval = 0x0800;
3197 hdev->le_scan_interval = 0x0060;
3198 hdev->le_scan_window = 0x0030;
3199 hdev->le_conn_min_interval = 0x0028;
3200 hdev->le_conn_max_interval = 0x0038;
3201 hdev->le_conn_latency = 0x0000;
3202 hdev->le_supv_timeout = 0x002a;
3203 hdev->le_def_tx_len = 0x001b;
3204 hdev->le_def_tx_time = 0x0148;
3205 hdev->le_max_tx_len = 0x001b;
3206 hdev->le_max_tx_time = 0x0148;
3207 hdev->le_max_rx_len = 0x001b;
3208 hdev->le_max_rx_time = 0x0148;
3209
3210 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3211 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3212 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3213 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3214
3215 mutex_init(&hdev->lock);
3216 mutex_init(&hdev->req_lock);
3217
3218 INIT_LIST_HEAD(&hdev->mgmt_pending);
3219 INIT_LIST_HEAD(&hdev->blacklist);
3220 INIT_LIST_HEAD(&hdev->whitelist);
3221 INIT_LIST_HEAD(&hdev->uuids);
3222 INIT_LIST_HEAD(&hdev->link_keys);
3223 INIT_LIST_HEAD(&hdev->long_term_keys);
3224 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3225 INIT_LIST_HEAD(&hdev->remote_oob_data);
3226 INIT_LIST_HEAD(&hdev->le_white_list);
3227 INIT_LIST_HEAD(&hdev->le_conn_params);
3228 INIT_LIST_HEAD(&hdev->pend_le_conns);
3229 INIT_LIST_HEAD(&hdev->pend_le_reports);
3230 INIT_LIST_HEAD(&hdev->conn_hash.list);
3231 INIT_LIST_HEAD(&hdev->adv_instances);
3232
3233 INIT_WORK(&hdev->rx_work, hci_rx_work);
3234 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3235 INIT_WORK(&hdev->tx_work, hci_tx_work);
3236 INIT_WORK(&hdev->power_on, hci_power_on);
3237 INIT_WORK(&hdev->error_reset, hci_error_reset);
3238
3239 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3240 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
3241 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3242 INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
3243 INIT_DELAYED_WORK(&hdev->adv_instance_expire, hci_adv_timeout_expire);
3244
3245 skb_queue_head_init(&hdev->rx_q);
3246 skb_queue_head_init(&hdev->cmd_q);
3247 skb_queue_head_init(&hdev->raw_q);
3248
3249 init_waitqueue_head(&hdev->req_wait_q);
3250
3251 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3252
3253 hci_init_sysfs(hdev);
3254 discovery_init(hdev);
3255
3256 return hdev;
3257 }
3258 EXPORT_SYMBOL(hci_alloc_dev);
3259
3260 /* Free HCI device */
3261 void hci_free_dev(struct hci_dev *hdev)
3262 {
3263 /* will free via device release */
3264 put_device(&hdev->dev);
3265 }
3266 EXPORT_SYMBOL(hci_free_dev);
3267
3268 /* Register HCI device */
3269 int hci_register_dev(struct hci_dev *hdev)
3270 {
3271 int id, error;
3272
3273 if (!hdev->open || !hdev->close || !hdev->send)
3274 return -EINVAL;
3275
3276 /* Do not allow HCI_AMP devices to register at index 0,
3277 * so the index can be used as the AMP controller ID.
3278 */
3279 switch (hdev->dev_type) {
3280 case HCI_BREDR:
3281 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3282 break;
3283 case HCI_AMP:
3284 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3285 break;
3286 default:
3287 return -EINVAL;
3288 }
3289
3290 if (id < 0)
3291 return id;
3292
3293 sprintf(hdev->name, "hci%d", id);
3294 hdev->id = id;
3295
3296 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3297
3298 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3299 WQ_MEM_RECLAIM, 1, hdev->name);
3300 if (!hdev->workqueue) {
3301 error = -ENOMEM;
3302 goto err;
3303 }
3304
3305 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3306 WQ_MEM_RECLAIM, 1, hdev->name);
3307 if (!hdev->req_workqueue) {
3308 destroy_workqueue(hdev->workqueue);
3309 error = -ENOMEM;
3310 goto err;
3311 }
3312
3313 if (!IS_ERR_OR_NULL(bt_debugfs))
3314 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3315
3316 dev_set_name(&hdev->dev, "%s", hdev->name);
3317
3318 error = device_add(&hdev->dev);
3319 if (error < 0)
3320 goto err_wqueue;
3321
3322 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3323 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3324 hdev);
3325 if (hdev->rfkill) {
3326 if (rfkill_register(hdev->rfkill) < 0) {
3327 rfkill_destroy(hdev->rfkill);
3328 hdev->rfkill = NULL;
3329 }
3330 }
3331
3332 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3333 hci_dev_set_flag(hdev, HCI_RFKILLED);
3334
3335 hci_dev_set_flag(hdev, HCI_SETUP);
3336 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3337
3338 if (hdev->dev_type == HCI_BREDR) {
3339 /* Assume BR/EDR support until proven otherwise (such as
3340 * through reading supported features during init.
3341 */
3342 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3343 }
3344
3345 write_lock(&hci_dev_list_lock);
3346 list_add(&hdev->list, &hci_dev_list);
3347 write_unlock(&hci_dev_list_lock);
3348
3349 /* Devices that are marked for raw-only usage are unconfigured
3350 * and should not be included in normal operation.
3351 */
3352 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3353 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3354
3355 hci_notify(hdev, HCI_DEV_REG);
3356 hci_dev_hold(hdev);
3357
3358 queue_work(hdev->req_workqueue, &hdev->power_on);
3359
3360 return id;
3361
3362 err_wqueue:
3363 destroy_workqueue(hdev->workqueue);
3364 destroy_workqueue(hdev->req_workqueue);
3365 err:
3366 ida_simple_remove(&hci_index_ida, hdev->id);
3367
3368 return error;
3369 }
3370 EXPORT_SYMBOL(hci_register_dev);
3371
3372 /* Unregister HCI device */
3373 void hci_unregister_dev(struct hci_dev *hdev)
3374 {
3375 int id;
3376
3377 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3378
3379 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3380
3381 id = hdev->id;
3382
3383 write_lock(&hci_dev_list_lock);
3384 list_del(&hdev->list);
3385 write_unlock(&hci_dev_list_lock);
3386
3387 hci_dev_do_close(hdev);
3388
3389 cancel_work_sync(&hdev->power_on);
3390
3391 if (!test_bit(HCI_INIT, &hdev->flags) &&
3392 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3393 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3394 hci_dev_lock(hdev);
3395 mgmt_index_removed(hdev);
3396 hci_dev_unlock(hdev);
3397 }
3398
3399 /* mgmt_index_removed should take care of emptying the
3400 * pending list */
3401 BUG_ON(!list_empty(&hdev->mgmt_pending));
3402
3403 hci_notify(hdev, HCI_DEV_UNREG);
3404
3405 if (hdev->rfkill) {
3406 rfkill_unregister(hdev->rfkill);
3407 rfkill_destroy(hdev->rfkill);
3408 }
3409
3410 device_del(&hdev->dev);
3411
3412 debugfs_remove_recursive(hdev->debugfs);
3413
3414 destroy_workqueue(hdev->workqueue);
3415 destroy_workqueue(hdev->req_workqueue);
3416
3417 hci_dev_lock(hdev);
3418 hci_bdaddr_list_clear(&hdev->blacklist);
3419 hci_bdaddr_list_clear(&hdev->whitelist);
3420 hci_uuids_clear(hdev);
3421 hci_link_keys_clear(hdev);
3422 hci_smp_ltks_clear(hdev);
3423 hci_smp_irks_clear(hdev);
3424 hci_remote_oob_data_clear(hdev);
3425 hci_adv_instances_clear(hdev);
3426 hci_bdaddr_list_clear(&hdev->le_white_list);
3427 hci_conn_params_clear_all(hdev);
3428 hci_discovery_filter_clear(hdev);
3429 hci_dev_unlock(hdev);
3430
3431 hci_dev_put(hdev);
3432
3433 ida_simple_remove(&hci_index_ida, id);
3434 }
3435 EXPORT_SYMBOL(hci_unregister_dev);
3436
3437 /* Suspend HCI device */
3438 int hci_suspend_dev(struct hci_dev *hdev)
3439 {
3440 hci_notify(hdev, HCI_DEV_SUSPEND);
3441 return 0;
3442 }
3443 EXPORT_SYMBOL(hci_suspend_dev);
3444
3445 /* Resume HCI device */
3446 int hci_resume_dev(struct hci_dev *hdev)
3447 {
3448 hci_notify(hdev, HCI_DEV_RESUME);
3449 return 0;
3450 }
3451 EXPORT_SYMBOL(hci_resume_dev);
3452
3453 /* Reset HCI device */
3454 int hci_reset_dev(struct hci_dev *hdev)
3455 {
3456 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3457 struct sk_buff *skb;
3458
3459 skb = bt_skb_alloc(3, GFP_ATOMIC);
3460 if (!skb)
3461 return -ENOMEM;
3462
3463 bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
3464 memcpy(skb_put(skb, 3), hw_err, 3);
3465
3466 /* Send Hardware Error to upper stack */
3467 return hci_recv_frame(hdev, skb);
3468 }
3469 EXPORT_SYMBOL(hci_reset_dev);
3470
3471 /* Receive frame from HCI drivers */
3472 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3473 {
3474 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3475 && !test_bit(HCI_INIT, &hdev->flags))) {
3476 kfree_skb(skb);
3477 return -ENXIO;
3478 }
3479
3480 /* Incoming skb */
3481 bt_cb(skb)->incoming = 1;
3482
3483 /* Time stamp */
3484 __net_timestamp(skb);
3485
3486 skb_queue_tail(&hdev->rx_q, skb);
3487 queue_work(hdev->workqueue, &hdev->rx_work);
3488
3489 return 0;
3490 }
3491 EXPORT_SYMBOL(hci_recv_frame);
3492
3493 /* ---- Interface to upper protocols ---- */
3494
3495 int hci_register_cb(struct hci_cb *cb)
3496 {
3497 BT_DBG("%p name %s", cb, cb->name);
3498
3499 mutex_lock(&hci_cb_list_lock);
3500 list_add_tail(&cb->list, &hci_cb_list);
3501 mutex_unlock(&hci_cb_list_lock);
3502
3503 return 0;
3504 }
3505 EXPORT_SYMBOL(hci_register_cb);
3506
3507 int hci_unregister_cb(struct hci_cb *cb)
3508 {
3509 BT_DBG("%p name %s", cb, cb->name);
3510
3511 mutex_lock(&hci_cb_list_lock);
3512 list_del(&cb->list);
3513 mutex_unlock(&hci_cb_list_lock);
3514
3515 return 0;
3516 }
3517 EXPORT_SYMBOL(hci_unregister_cb);
3518
3519 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3520 {
3521 int err;
3522
3523 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
3524
3525 /* Time stamp */
3526 __net_timestamp(skb);
3527
3528 /* Send copy to monitor */
3529 hci_send_to_monitor(hdev, skb);
3530
3531 if (atomic_read(&hdev->promisc)) {
3532 /* Send copy to the sockets */
3533 hci_send_to_sock(hdev, skb);
3534 }
3535
3536 /* Get rid of skb owner, prior to sending to the driver. */
3537 skb_orphan(skb);
3538
3539 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3540 kfree_skb(skb);
3541 return;
3542 }
3543
3544 err = hdev->send(hdev, skb);
3545 if (err < 0) {
3546 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3547 kfree_skb(skb);
3548 }
3549 }
3550
3551 /* Send HCI command */
3552 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3553 const void *param)
3554 {
3555 struct sk_buff *skb;
3556
3557 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3558
3559 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3560 if (!skb) {
3561 BT_ERR("%s no memory for command", hdev->name);
3562 return -ENOMEM;
3563 }
3564
3565 /* Stand-alone HCI commands must be flagged as
3566 * single-command requests.
3567 */
3568 bt_cb(skb)->req.start = true;
3569
3570 skb_queue_tail(&hdev->cmd_q, skb);
3571 queue_work(hdev->workqueue, &hdev->cmd_work);
3572
3573 return 0;
3574 }
3575
3576 /* Get data from the previously sent command */
3577 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3578 {
3579 struct hci_command_hdr *hdr;
3580
3581 if (!hdev->sent_cmd)
3582 return NULL;
3583
3584 hdr = (void *) hdev->sent_cmd->data;
3585
3586 if (hdr->opcode != cpu_to_le16(opcode))
3587 return NULL;
3588
3589 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3590
3591 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3592 }
3593
3594 /* Send HCI command and wait for command commplete event */
3595 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3596 const void *param, u32 timeout)
3597 {
3598 struct sk_buff *skb;
3599
3600 if (!test_bit(HCI_UP, &hdev->flags))
3601 return ERR_PTR(-ENETDOWN);
3602
3603 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3604
3605 hci_req_lock(hdev);
3606 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3607 hci_req_unlock(hdev);
3608
3609 return skb;
3610 }
3611 EXPORT_SYMBOL(hci_cmd_sync);
3612
3613 /* Send ACL data */
3614 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3615 {
3616 struct hci_acl_hdr *hdr;
3617 int len = skb->len;
3618
3619 skb_push(skb, HCI_ACL_HDR_SIZE);
3620 skb_reset_transport_header(skb);
3621 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3622 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3623 hdr->dlen = cpu_to_le16(len);
3624 }
3625
3626 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3627 struct sk_buff *skb, __u16 flags)
3628 {
3629 struct hci_conn *conn = chan->conn;
3630 struct hci_dev *hdev = conn->hdev;
3631 struct sk_buff *list;
3632
3633 skb->len = skb_headlen(skb);
3634 skb->data_len = 0;
3635
3636 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3637
3638 switch (hdev->dev_type) {
3639 case HCI_BREDR:
3640 hci_add_acl_hdr(skb, conn->handle, flags);
3641 break;
3642 case HCI_AMP:
3643 hci_add_acl_hdr(skb, chan->handle, flags);
3644 break;
3645 default:
3646 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3647 return;
3648 }
3649
3650 list = skb_shinfo(skb)->frag_list;
3651 if (!list) {
3652 /* Non fragmented */
3653 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3654
3655 skb_queue_tail(queue, skb);
3656 } else {
3657 /* Fragmented */
3658 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3659
3660 skb_shinfo(skb)->frag_list = NULL;
3661
3662 /* Queue all fragments atomically. We need to use spin_lock_bh
3663 * here because of 6LoWPAN links, as there this function is
3664 * called from softirq and using normal spin lock could cause
3665 * deadlocks.
3666 */
3667 spin_lock_bh(&queue->lock);
3668
3669 __skb_queue_tail(queue, skb);
3670
3671 flags &= ~ACL_START;
3672 flags |= ACL_CONT;
3673 do {
3674 skb = list; list = list->next;
3675
3676 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3677 hci_add_acl_hdr(skb, conn->handle, flags);
3678
3679 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3680
3681 __skb_queue_tail(queue, skb);
3682 } while (list);
3683
3684 spin_unlock_bh(&queue->lock);
3685 }
3686 }
3687
3688 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3689 {
3690 struct hci_dev *hdev = chan->conn->hdev;
3691
3692 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3693
3694 hci_queue_acl(chan, &chan->data_q, skb, flags);
3695
3696 queue_work(hdev->workqueue, &hdev->tx_work);
3697 }
3698
3699 /* Send SCO data */
3700 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3701 {
3702 struct hci_dev *hdev = conn->hdev;
3703 struct hci_sco_hdr hdr;
3704
3705 BT_DBG("%s len %d", hdev->name, skb->len);
3706
3707 hdr.handle = cpu_to_le16(conn->handle);
3708 hdr.dlen = skb->len;
3709
3710 skb_push(skb, HCI_SCO_HDR_SIZE);
3711 skb_reset_transport_header(skb);
3712 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3713
3714 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
3715
3716 skb_queue_tail(&conn->data_q, skb);
3717 queue_work(hdev->workqueue, &hdev->tx_work);
3718 }
3719
3720 /* ---- HCI TX task (outgoing data) ---- */
3721
3722 /* HCI Connection scheduler */
3723 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3724 int *quote)
3725 {
3726 struct hci_conn_hash *h = &hdev->conn_hash;
3727 struct hci_conn *conn = NULL, *c;
3728 unsigned int num = 0, min = ~0;
3729
3730 /* We don't have to lock device here. Connections are always
3731 * added and removed with TX task disabled. */
3732
3733 rcu_read_lock();
3734
3735 list_for_each_entry_rcu(c, &h->list, list) {
3736 if (c->type != type || skb_queue_empty(&c->data_q))
3737 continue;
3738
3739 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3740 continue;
3741
3742 num++;
3743
3744 if (c->sent < min) {
3745 min = c->sent;
3746 conn = c;
3747 }
3748
3749 if (hci_conn_num(hdev, type) == num)
3750 break;
3751 }
3752
3753 rcu_read_unlock();
3754
3755 if (conn) {
3756 int cnt, q;
3757
3758 switch (conn->type) {
3759 case ACL_LINK:
3760 cnt = hdev->acl_cnt;
3761 break;
3762 case SCO_LINK:
3763 case ESCO_LINK:
3764 cnt = hdev->sco_cnt;
3765 break;
3766 case LE_LINK:
3767 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3768 break;
3769 default:
3770 cnt = 0;
3771 BT_ERR("Unknown link type");
3772 }
3773
3774 q = cnt / num;
3775 *quote = q ? q : 1;
3776 } else
3777 *quote = 0;
3778
3779 BT_DBG("conn %p quote %d", conn, *quote);
3780 return conn;
3781 }
3782
3783 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3784 {
3785 struct hci_conn_hash *h = &hdev->conn_hash;
3786 struct hci_conn *c;
3787
3788 BT_ERR("%s link tx timeout", hdev->name);
3789
3790 rcu_read_lock();
3791
3792 /* Kill stalled connections */
3793 list_for_each_entry_rcu(c, &h->list, list) {
3794 if (c->type == type && c->sent) {
3795 BT_ERR("%s killing stalled connection %pMR",
3796 hdev->name, &c->dst);
3797 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3798 }
3799 }
3800
3801 rcu_read_unlock();
3802 }
3803
3804 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3805 int *quote)
3806 {
3807 struct hci_conn_hash *h = &hdev->conn_hash;
3808 struct hci_chan *chan = NULL;
3809 unsigned int num = 0, min = ~0, cur_prio = 0;
3810 struct hci_conn *conn;
3811 int cnt, q, conn_num = 0;
3812
3813 BT_DBG("%s", hdev->name);
3814
3815 rcu_read_lock();
3816
3817 list_for_each_entry_rcu(conn, &h->list, list) {
3818 struct hci_chan *tmp;
3819
3820 if (conn->type != type)
3821 continue;
3822
3823 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3824 continue;
3825
3826 conn_num++;
3827
3828 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3829 struct sk_buff *skb;
3830
3831 if (skb_queue_empty(&tmp->data_q))
3832 continue;
3833
3834 skb = skb_peek(&tmp->data_q);
3835 if (skb->priority < cur_prio)
3836 continue;
3837
3838 if (skb->priority > cur_prio) {
3839 num = 0;
3840 min = ~0;
3841 cur_prio = skb->priority;
3842 }
3843
3844 num++;
3845
3846 if (conn->sent < min) {
3847 min = conn->sent;
3848 chan = tmp;
3849 }
3850 }
3851
3852 if (hci_conn_num(hdev, type) == conn_num)
3853 break;
3854 }
3855
3856 rcu_read_unlock();
3857
3858 if (!chan)
3859 return NULL;
3860
3861 switch (chan->conn->type) {
3862 case ACL_LINK:
3863 cnt = hdev->acl_cnt;
3864 break;
3865 case AMP_LINK:
3866 cnt = hdev->block_cnt;
3867 break;
3868 case SCO_LINK:
3869 case ESCO_LINK:
3870 cnt = hdev->sco_cnt;
3871 break;
3872 case LE_LINK:
3873 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3874 break;
3875 default:
3876 cnt = 0;
3877 BT_ERR("Unknown link type");
3878 }
3879
3880 q = cnt / num;
3881 *quote = q ? q : 1;
3882 BT_DBG("chan %p quote %d", chan, *quote);
3883 return chan;
3884 }
3885
3886 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3887 {
3888 struct hci_conn_hash *h = &hdev->conn_hash;
3889 struct hci_conn *conn;
3890 int num = 0;
3891
3892 BT_DBG("%s", hdev->name);
3893
3894 rcu_read_lock();
3895
3896 list_for_each_entry_rcu(conn, &h->list, list) {
3897 struct hci_chan *chan;
3898
3899 if (conn->type != type)
3900 continue;
3901
3902 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3903 continue;
3904
3905 num++;
3906
3907 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3908 struct sk_buff *skb;
3909
3910 if (chan->sent) {
3911 chan->sent = 0;
3912 continue;
3913 }
3914
3915 if (skb_queue_empty(&chan->data_q))
3916 continue;
3917
3918 skb = skb_peek(&chan->data_q);
3919 if (skb->priority >= HCI_PRIO_MAX - 1)
3920 continue;
3921
3922 skb->priority = HCI_PRIO_MAX - 1;
3923
3924 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3925 skb->priority);
3926 }
3927
3928 if (hci_conn_num(hdev, type) == num)
3929 break;
3930 }
3931
3932 rcu_read_unlock();
3933
3934 }
3935
3936 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3937 {
3938 /* Calculate count of blocks used by this packet */
3939 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3940 }
3941
3942 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3943 {
3944 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3945 /* ACL tx timeout must be longer than maximum
3946 * link supervision timeout (40.9 seconds) */
3947 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3948 HCI_ACL_TX_TIMEOUT))
3949 hci_link_tx_to(hdev, ACL_LINK);
3950 }
3951 }
3952
3953 static void hci_sched_acl_pkt(struct hci_dev *hdev)
3954 {
3955 unsigned int cnt = hdev->acl_cnt;
3956 struct hci_chan *chan;
3957 struct sk_buff *skb;
3958 int quote;
3959
3960 __check_timeout(hdev, cnt);
3961
3962 while (hdev->acl_cnt &&
3963 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
3964 u32 priority = (skb_peek(&chan->data_q))->priority;
3965 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3966 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3967 skb->len, skb->priority);
3968
3969 /* Stop if priority has changed */
3970 if (skb->priority < priority)
3971 break;
3972
3973 skb = skb_dequeue(&chan->data_q);
3974
3975 hci_conn_enter_active_mode(chan->conn,
3976 bt_cb(skb)->force_active);
3977
3978 hci_send_frame(hdev, skb);
3979 hdev->acl_last_tx = jiffies;
3980
3981 hdev->acl_cnt--;
3982 chan->sent++;
3983 chan->conn->sent++;
3984 }
3985 }
3986
3987 if (cnt != hdev->acl_cnt)
3988 hci_prio_recalculate(hdev, ACL_LINK);
3989 }
3990
3991 static void hci_sched_acl_blk(struct hci_dev *hdev)
3992 {
3993 unsigned int cnt = hdev->block_cnt;
3994 struct hci_chan *chan;
3995 struct sk_buff *skb;
3996 int quote;
3997 u8 type;
3998
3999 __check_timeout(hdev, cnt);
4000
4001 BT_DBG("%s", hdev->name);
4002
4003 if (hdev->dev_type == HCI_AMP)
4004 type = AMP_LINK;
4005 else
4006 type = ACL_LINK;
4007
4008 while (hdev->block_cnt > 0 &&
4009 (chan = hci_chan_sent(hdev, type, &quote))) {
4010 u32 priority = (skb_peek(&chan->data_q))->priority;
4011 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4012 int blocks;
4013
4014 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4015 skb->len, skb->priority);
4016
4017 /* Stop if priority has changed */
4018 if (skb->priority < priority)
4019 break;
4020
4021 skb = skb_dequeue(&chan->data_q);
4022
4023 blocks = __get_blocks(hdev, skb);
4024 if (blocks > hdev->block_cnt)
4025 return;
4026
4027 hci_conn_enter_active_mode(chan->conn,
4028 bt_cb(skb)->force_active);
4029
4030 hci_send_frame(hdev, skb);
4031 hdev->acl_last_tx = jiffies;
4032
4033 hdev->block_cnt -= blocks;
4034 quote -= blocks;
4035
4036 chan->sent += blocks;
4037 chan->conn->sent += blocks;
4038 }
4039 }
4040
4041 if (cnt != hdev->block_cnt)
4042 hci_prio_recalculate(hdev, type);
4043 }
4044
4045 static void hci_sched_acl(struct hci_dev *hdev)
4046 {
4047 BT_DBG("%s", hdev->name);
4048
4049 /* No ACL link over BR/EDR controller */
4050 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
4051 return;
4052
4053 /* No AMP link over AMP controller */
4054 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4055 return;
4056
4057 switch (hdev->flow_ctl_mode) {
4058 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4059 hci_sched_acl_pkt(hdev);
4060 break;
4061
4062 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4063 hci_sched_acl_blk(hdev);
4064 break;
4065 }
4066 }
4067
4068 /* Schedule SCO */
4069 static void hci_sched_sco(struct hci_dev *hdev)
4070 {
4071 struct hci_conn *conn;
4072 struct sk_buff *skb;
4073 int quote;
4074
4075 BT_DBG("%s", hdev->name);
4076
4077 if (!hci_conn_num(hdev, SCO_LINK))
4078 return;
4079
4080 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
4081 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4082 BT_DBG("skb %p len %d", skb, skb->len);
4083 hci_send_frame(hdev, skb);
4084
4085 conn->sent++;
4086 if (conn->sent == ~0)
4087 conn->sent = 0;
4088 }
4089 }
4090 }
4091
4092 static void hci_sched_esco(struct hci_dev *hdev)
4093 {
4094 struct hci_conn *conn;
4095 struct sk_buff *skb;
4096 int quote;
4097
4098 BT_DBG("%s", hdev->name);
4099
4100 if (!hci_conn_num(hdev, ESCO_LINK))
4101 return;
4102
4103 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4104 &quote))) {
4105 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4106 BT_DBG("skb %p len %d", skb, skb->len);
4107 hci_send_frame(hdev, skb);
4108
4109 conn->sent++;
4110 if (conn->sent == ~0)
4111 conn->sent = 0;
4112 }
4113 }
4114 }
4115
4116 static void hci_sched_le(struct hci_dev *hdev)
4117 {
4118 struct hci_chan *chan;
4119 struct sk_buff *skb;
4120 int quote, cnt, tmp;
4121
4122 BT_DBG("%s", hdev->name);
4123
4124 if (!hci_conn_num(hdev, LE_LINK))
4125 return;
4126
4127 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4128 /* LE tx timeout must be longer than maximum
4129 * link supervision timeout (40.9 seconds) */
4130 if (!hdev->le_cnt && hdev->le_pkts &&
4131 time_after(jiffies, hdev->le_last_tx + HZ * 45))
4132 hci_link_tx_to(hdev, LE_LINK);
4133 }
4134
4135 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4136 tmp = cnt;
4137 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
4138 u32 priority = (skb_peek(&chan->data_q))->priority;
4139 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4140 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4141 skb->len, skb->priority);
4142
4143 /* Stop if priority has changed */
4144 if (skb->priority < priority)
4145 break;
4146
4147 skb = skb_dequeue(&chan->data_q);
4148
4149 hci_send_frame(hdev, skb);
4150 hdev->le_last_tx = jiffies;
4151
4152 cnt--;
4153 chan->sent++;
4154 chan->conn->sent++;
4155 }
4156 }
4157
4158 if (hdev->le_pkts)
4159 hdev->le_cnt = cnt;
4160 else
4161 hdev->acl_cnt = cnt;
4162
4163 if (cnt != tmp)
4164 hci_prio_recalculate(hdev, LE_LINK);
4165 }
4166
4167 static void hci_tx_work(struct work_struct *work)
4168 {
4169 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4170 struct sk_buff *skb;
4171
4172 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4173 hdev->sco_cnt, hdev->le_cnt);
4174
4175 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4176 /* Schedule queues and send stuff to HCI driver */
4177 hci_sched_acl(hdev);
4178 hci_sched_sco(hdev);
4179 hci_sched_esco(hdev);
4180 hci_sched_le(hdev);
4181 }
4182
4183 /* Send next queued raw (unknown type) packet */
4184 while ((skb = skb_dequeue(&hdev->raw_q)))
4185 hci_send_frame(hdev, skb);
4186 }
4187
4188 /* ----- HCI RX task (incoming data processing) ----- */
4189
4190 /* ACL data packet */
4191 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4192 {
4193 struct hci_acl_hdr *hdr = (void *) skb->data;
4194 struct hci_conn *conn;
4195 __u16 handle, flags;
4196
4197 skb_pull(skb, HCI_ACL_HDR_SIZE);
4198
4199 handle = __le16_to_cpu(hdr->handle);
4200 flags = hci_flags(handle);
4201 handle = hci_handle(handle);
4202
4203 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4204 handle, flags);
4205
4206 hdev->stat.acl_rx++;
4207
4208 hci_dev_lock(hdev);
4209 conn = hci_conn_hash_lookup_handle(hdev, handle);
4210 hci_dev_unlock(hdev);
4211
4212 if (conn) {
4213 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4214
4215 /* Send to upper protocol */
4216 l2cap_recv_acldata(conn, skb, flags);
4217 return;
4218 } else {
4219 BT_ERR("%s ACL packet for unknown connection handle %d",
4220 hdev->name, handle);
4221 }
4222
4223 kfree_skb(skb);
4224 }
4225
4226 /* SCO data packet */
4227 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4228 {
4229 struct hci_sco_hdr *hdr = (void *) skb->data;
4230 struct hci_conn *conn;
4231 __u16 handle;
4232
4233 skb_pull(skb, HCI_SCO_HDR_SIZE);
4234
4235 handle = __le16_to_cpu(hdr->handle);
4236
4237 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4238
4239 hdev->stat.sco_rx++;
4240
4241 hci_dev_lock(hdev);
4242 conn = hci_conn_hash_lookup_handle(hdev, handle);
4243 hci_dev_unlock(hdev);
4244
4245 if (conn) {
4246 /* Send to upper protocol */
4247 sco_recv_scodata(conn, skb);
4248 return;
4249 } else {
4250 BT_ERR("%s SCO packet for unknown connection handle %d",
4251 hdev->name, handle);
4252 }
4253
4254 kfree_skb(skb);
4255 }
4256
4257 static bool hci_req_is_complete(struct hci_dev *hdev)
4258 {
4259 struct sk_buff *skb;
4260
4261 skb = skb_peek(&hdev->cmd_q);
4262 if (!skb)
4263 return true;
4264
4265 return bt_cb(skb)->req.start;
4266 }
4267
4268 static void hci_resend_last(struct hci_dev *hdev)
4269 {
4270 struct hci_command_hdr *sent;
4271 struct sk_buff *skb;
4272 u16 opcode;
4273
4274 if (!hdev->sent_cmd)
4275 return;
4276
4277 sent = (void *) hdev->sent_cmd->data;
4278 opcode = __le16_to_cpu(sent->opcode);
4279 if (opcode == HCI_OP_RESET)
4280 return;
4281
4282 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4283 if (!skb)
4284 return;
4285
4286 skb_queue_head(&hdev->cmd_q, skb);
4287 queue_work(hdev->workqueue, &hdev->cmd_work);
4288 }
4289
4290 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4291 hci_req_complete_t *req_complete,
4292 hci_req_complete_skb_t *req_complete_skb)
4293 {
4294 struct sk_buff *skb;
4295 unsigned long flags;
4296
4297 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4298
4299 /* If the completed command doesn't match the last one that was
4300 * sent we need to do special handling of it.
4301 */
4302 if (!hci_sent_cmd_data(hdev, opcode)) {
4303 /* Some CSR based controllers generate a spontaneous
4304 * reset complete event during init and any pending
4305 * command will never be completed. In such a case we
4306 * need to resend whatever was the last sent
4307 * command.
4308 */
4309 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4310 hci_resend_last(hdev);
4311
4312 return;
4313 }
4314
4315 /* If the command succeeded and there's still more commands in
4316 * this request the request is not yet complete.
4317 */
4318 if (!status && !hci_req_is_complete(hdev))
4319 return;
4320
4321 /* If this was the last command in a request the complete
4322 * callback would be found in hdev->sent_cmd instead of the
4323 * command queue (hdev->cmd_q).
4324 */
4325 if (bt_cb(hdev->sent_cmd)->req.complete) {
4326 *req_complete = bt_cb(hdev->sent_cmd)->req.complete;
4327 return;
4328 }
4329
4330 if (bt_cb(hdev->sent_cmd)->req.complete_skb) {
4331 *req_complete_skb = bt_cb(hdev->sent_cmd)->req.complete_skb;
4332 return;
4333 }
4334
4335 /* Remove all pending commands belonging to this request */
4336 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4337 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4338 if (bt_cb(skb)->req.start) {
4339 __skb_queue_head(&hdev->cmd_q, skb);
4340 break;
4341 }
4342
4343 *req_complete = bt_cb(skb)->req.complete;
4344 *req_complete_skb = bt_cb(skb)->req.complete_skb;
4345 kfree_skb(skb);
4346 }
4347 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4348 }
4349
4350 static void hci_rx_work(struct work_struct *work)
4351 {
4352 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4353 struct sk_buff *skb;
4354
4355 BT_DBG("%s", hdev->name);
4356
4357 while ((skb = skb_dequeue(&hdev->rx_q))) {
4358 /* Send copy to monitor */
4359 hci_send_to_monitor(hdev, skb);
4360
4361 if (atomic_read(&hdev->promisc)) {
4362 /* Send copy to the sockets */
4363 hci_send_to_sock(hdev, skb);
4364 }
4365
4366 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4367 kfree_skb(skb);
4368 continue;
4369 }
4370
4371 if (test_bit(HCI_INIT, &hdev->flags)) {
4372 /* Don't process data packets in this states. */
4373 switch (bt_cb(skb)->pkt_type) {
4374 case HCI_ACLDATA_PKT:
4375 case HCI_SCODATA_PKT:
4376 kfree_skb(skb);
4377 continue;
4378 }
4379 }
4380
4381 /* Process frame */
4382 switch (bt_cb(skb)->pkt_type) {
4383 case HCI_EVENT_PKT:
4384 BT_DBG("%s Event packet", hdev->name);
4385 hci_event_packet(hdev, skb);
4386 break;
4387
4388 case HCI_ACLDATA_PKT:
4389 BT_DBG("%s ACL data packet", hdev->name);
4390 hci_acldata_packet(hdev, skb);
4391 break;
4392
4393 case HCI_SCODATA_PKT:
4394 BT_DBG("%s SCO data packet", hdev->name);
4395 hci_scodata_packet(hdev, skb);
4396 break;
4397
4398 default:
4399 kfree_skb(skb);
4400 break;
4401 }
4402 }
4403 }
4404
4405 static void hci_cmd_work(struct work_struct *work)
4406 {
4407 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4408 struct sk_buff *skb;
4409
4410 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4411 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4412
4413 /* Send queued commands */
4414 if (atomic_read(&hdev->cmd_cnt)) {
4415 skb = skb_dequeue(&hdev->cmd_q);
4416 if (!skb)
4417 return;
4418
4419 kfree_skb(hdev->sent_cmd);
4420
4421 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4422 if (hdev->sent_cmd) {
4423 atomic_dec(&hdev->cmd_cnt);
4424 hci_send_frame(hdev, skb);
4425 if (test_bit(HCI_RESET, &hdev->flags))
4426 cancel_delayed_work(&hdev->cmd_timer);
4427 else
4428 schedule_delayed_work(&hdev->cmd_timer,
4429 HCI_CMD_TIMEOUT);
4430 } else {
4431 skb_queue_head(&hdev->cmd_q, skb);
4432 queue_work(hdev->workqueue, &hdev->cmd_work);
4433 }
4434 }
4435 }
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