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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#include "leds.h"
44
45static void hci_rx_work(struct work_struct *work);
46static void hci_cmd_work(struct work_struct *work);
47static void hci_tx_work(struct work_struct *work);
48
49/* HCI device list */
50LIST_HEAD(hci_dev_list);
51DEFINE_RWLOCK(hci_dev_list_lock);
52
53/* HCI callback list */
54LIST_HEAD(hci_cb_list);
55DEFINE_MUTEX(hci_cb_list_lock);
56
57/* HCI ID Numbering */
58static DEFINE_IDA(hci_index_ida);
59
60/* ---- HCI debugfs entries ---- */
61
62static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
63 size_t count, loff_t *ppos)
64{
65 struct hci_dev *hdev = file->private_data;
66 char buf[3];
67
68 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
69 buf[1] = '\n';
70 buf[2] = '\0';
71 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
72}
73
74static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
75 size_t count, loff_t *ppos)
76{
77 struct hci_dev *hdev = file->private_data;
78 struct sk_buff *skb;
79 char buf[32];
80 size_t buf_size = min(count, (sizeof(buf)-1));
81 bool enable;
82
83 if (!test_bit(HCI_UP, &hdev->flags))
84 return -ENETDOWN;
85
86 if (copy_from_user(buf, user_buf, buf_size))
87 return -EFAULT;
88
89 buf[buf_size] = '\0';
90 if (strtobool(buf, &enable))
91 return -EINVAL;
92
93 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
94 return -EALREADY;
95
96 hci_req_sync_lock(hdev);
97 if (enable)
98 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
99 HCI_CMD_TIMEOUT);
100 else
101 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
102 HCI_CMD_TIMEOUT);
103 hci_req_sync_unlock(hdev);
104
105 if (IS_ERR(skb))
106 return PTR_ERR(skb);
107
108 kfree_skb(skb);
109
110 hci_dev_change_flag(hdev, HCI_DUT_MODE);
111
112 return count;
113}
114
115static const struct file_operations dut_mode_fops = {
116 .open = simple_open,
117 .read = dut_mode_read,
118 .write = dut_mode_write,
119 .llseek = default_llseek,
120};
121
122static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
123 size_t count, loff_t *ppos)
124{
125 struct hci_dev *hdev = file->private_data;
126 char buf[3];
127
128 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
129 buf[1] = '\n';
130 buf[2] = '\0';
131 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
132}
133
134static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
135 size_t count, loff_t *ppos)
136{
137 struct hci_dev *hdev = file->private_data;
138 char buf[32];
139 size_t buf_size = min(count, (sizeof(buf)-1));
140 bool enable;
141 int err;
142
143 if (copy_from_user(buf, user_buf, buf_size))
144 return -EFAULT;
145
146 buf[buf_size] = '\0';
147 if (strtobool(buf, &enable))
148 return -EINVAL;
149
150 /* When the diagnostic flags are not persistent and the transport
151 * is not active, then there is no need for the vendor callback.
152 *
153 * Instead just store the desired value. If needed the setting
154 * will be programmed when the controller gets powered on.
155 */
156 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
157 !test_bit(HCI_RUNNING, &hdev->flags))
158 goto done;
159
160 hci_req_sync_lock(hdev);
161 err = hdev->set_diag(hdev, enable);
162 hci_req_sync_unlock(hdev);
163
164 if (err < 0)
165 return err;
166
167done:
168 if (enable)
169 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
170 else
171 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
172
173 return count;
174}
175
176static const struct file_operations vendor_diag_fops = {
177 .open = simple_open,
178 .read = vendor_diag_read,
179 .write = vendor_diag_write,
180 .llseek = default_llseek,
181};
182
183static void hci_debugfs_create_basic(struct hci_dev *hdev)
184{
185 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
186 &dut_mode_fops);
187
188 if (hdev->set_diag)
189 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
190 &vendor_diag_fops);
191}
192
193static int hci_reset_req(struct hci_request *req, unsigned long opt)
194{
195 BT_DBG("%s %ld", req->hdev->name, opt);
196
197 /* Reset device */
198 set_bit(HCI_RESET, &req->hdev->flags);
199 hci_req_add(req, HCI_OP_RESET, 0, NULL);
200 return 0;
201}
202
203static void bredr_init(struct hci_request *req)
204{
205 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
206
207 /* Read Local Supported Features */
208 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
209
210 /* Read Local Version */
211 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
212
213 /* Read BD Address */
214 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
215}
216
217static void amp_init1(struct hci_request *req)
218{
219 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
220
221 /* Read Local Version */
222 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
223
224 /* Read Local Supported Commands */
225 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
226
227 /* Read Local AMP Info */
228 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
229
230 /* Read Data Blk size */
231 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
232
233 /* Read Flow Control Mode */
234 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
235
236 /* Read Location Data */
237 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
238}
239
240static int amp_init2(struct hci_request *req)
241{
242 /* Read Local Supported Features. Not all AMP controllers
243 * support this so it's placed conditionally in the second
244 * stage init.
245 */
246 if (req->hdev->commands[14] & 0x20)
247 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
248
249 return 0;
250}
251
252static int hci_init1_req(struct hci_request *req, unsigned long opt)
253{
254 struct hci_dev *hdev = req->hdev;
255
256 BT_DBG("%s %ld", hdev->name, opt);
257
258 /* Reset */
259 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
260 hci_reset_req(req, 0);
261
262 switch (hdev->dev_type) {
263 case HCI_BREDR:
264 bredr_init(req);
265 break;
266
267 case HCI_AMP:
268 amp_init1(req);
269 break;
270
271 default:
272 BT_ERR("Unknown device type %d", hdev->dev_type);
273 break;
274 }
275
276 return 0;
277}
278
279static void bredr_setup(struct hci_request *req)
280{
281 __le16 param;
282 __u8 flt_type;
283
284 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
285 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
286
287 /* Read Class of Device */
288 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
289
290 /* Read Local Name */
291 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
292
293 /* Read Voice Setting */
294 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
295
296 /* Read Number of Supported IAC */
297 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
298
299 /* Read Current IAC LAP */
300 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
301
302 /* Clear Event Filters */
303 flt_type = HCI_FLT_CLEAR_ALL;
304 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
305
306 /* Connection accept timeout ~20 secs */
307 param = cpu_to_le16(0x7d00);
308 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
309}
310
311static void le_setup(struct hci_request *req)
312{
313 struct hci_dev *hdev = req->hdev;
314
315 /* Read LE Buffer Size */
316 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
317
318 /* Read LE Local Supported Features */
319 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
320
321 /* Read LE Supported States */
322 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
323
324 /* LE-only controllers have LE implicitly enabled */
325 if (!lmp_bredr_capable(hdev))
326 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
327}
328
329static void hci_setup_event_mask(struct hci_request *req)
330{
331 struct hci_dev *hdev = req->hdev;
332
333 /* The second byte is 0xff instead of 0x9f (two reserved bits
334 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
335 * command otherwise.
336 */
337 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
338
339 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
340 * any event mask for pre 1.2 devices.
341 */
342 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
343 return;
344
345 if (lmp_bredr_capable(hdev)) {
346 events[4] |= 0x01; /* Flow Specification Complete */
347 } else {
348 /* Use a different default for LE-only devices */
349 memset(events, 0, sizeof(events));
350 events[1] |= 0x20; /* Command Complete */
351 events[1] |= 0x40; /* Command Status */
352 events[1] |= 0x80; /* Hardware Error */
353
354 /* If the controller supports the Disconnect command, enable
355 * the corresponding event. In addition enable packet flow
356 * control related events.
357 */
358 if (hdev->commands[0] & 0x20) {
359 events[0] |= 0x10; /* Disconnection Complete */
360 events[2] |= 0x04; /* Number of Completed Packets */
361 events[3] |= 0x02; /* Data Buffer Overflow */
362 }
363
364 /* If the controller supports the Read Remote Version
365 * Information command, enable the corresponding event.
366 */
367 if (hdev->commands[2] & 0x80)
368 events[1] |= 0x08; /* Read Remote Version Information
369 * Complete
370 */
371
372 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
373 events[0] |= 0x80; /* Encryption Change */
374 events[5] |= 0x80; /* Encryption Key Refresh Complete */
375 }
376 }
377
378 if (lmp_inq_rssi_capable(hdev) ||
379 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
380 events[4] |= 0x02; /* Inquiry Result with RSSI */
381
382 if (lmp_ext_feat_capable(hdev))
383 events[4] |= 0x04; /* Read Remote Extended Features Complete */
384
385 if (lmp_esco_capable(hdev)) {
386 events[5] |= 0x08; /* Synchronous Connection Complete */
387 events[5] |= 0x10; /* Synchronous Connection Changed */
388 }
389
390 if (lmp_sniffsubr_capable(hdev))
391 events[5] |= 0x20; /* Sniff Subrating */
392
393 if (lmp_pause_enc_capable(hdev))
394 events[5] |= 0x80; /* Encryption Key Refresh Complete */
395
396 if (lmp_ext_inq_capable(hdev))
397 events[5] |= 0x40; /* Extended Inquiry Result */
398
399 if (lmp_no_flush_capable(hdev))
400 events[7] |= 0x01; /* Enhanced Flush Complete */
401
402 if (lmp_lsto_capable(hdev))
403 events[6] |= 0x80; /* Link Supervision Timeout Changed */
404
405 if (lmp_ssp_capable(hdev)) {
406 events[6] |= 0x01; /* IO Capability Request */
407 events[6] |= 0x02; /* IO Capability Response */
408 events[6] |= 0x04; /* User Confirmation Request */
409 events[6] |= 0x08; /* User Passkey Request */
410 events[6] |= 0x10; /* Remote OOB Data Request */
411 events[6] |= 0x20; /* Simple Pairing Complete */
412 events[7] |= 0x04; /* User Passkey Notification */
413 events[7] |= 0x08; /* Keypress Notification */
414 events[7] |= 0x10; /* Remote Host Supported
415 * Features Notification
416 */
417 }
418
419 if (lmp_le_capable(hdev))
420 events[7] |= 0x20; /* LE Meta-Event */
421
422 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
423}
424
425static int hci_init2_req(struct hci_request *req, unsigned long opt)
426{
427 struct hci_dev *hdev = req->hdev;
428
429 if (hdev->dev_type == HCI_AMP)
430 return amp_init2(req);
431
432 if (lmp_bredr_capable(hdev))
433 bredr_setup(req);
434 else
435 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
436
437 if (lmp_le_capable(hdev))
438 le_setup(req);
439
440 /* All Bluetooth 1.2 and later controllers should support the
441 * HCI command for reading the local supported commands.
442 *
443 * Unfortunately some controllers indicate Bluetooth 1.2 support,
444 * but do not have support for this command. If that is the case,
445 * the driver can quirk the behavior and skip reading the local
446 * supported commands.
447 */
448 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
449 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
450 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
451
452 if (lmp_ssp_capable(hdev)) {
453 /* When SSP is available, then the host features page
454 * should also be available as well. However some
455 * controllers list the max_page as 0 as long as SSP
456 * has not been enabled. To achieve proper debugging
457 * output, force the minimum max_page to 1 at least.
458 */
459 hdev->max_page = 0x01;
460
461 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
462 u8 mode = 0x01;
463
464 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
465 sizeof(mode), &mode);
466 } else {
467 struct hci_cp_write_eir cp;
468
469 memset(hdev->eir, 0, sizeof(hdev->eir));
470 memset(&cp, 0, sizeof(cp));
471
472 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
473 }
474 }
475
476 if (lmp_inq_rssi_capable(hdev) ||
477 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
478 u8 mode;
479
480 /* If Extended Inquiry Result events are supported, then
481 * they are clearly preferred over Inquiry Result with RSSI
482 * events.
483 */
484 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
485
486 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
487 }
488
489 if (lmp_inq_tx_pwr_capable(hdev))
490 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
491
492 if (lmp_ext_feat_capable(hdev)) {
493 struct hci_cp_read_local_ext_features cp;
494
495 cp.page = 0x01;
496 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
497 sizeof(cp), &cp);
498 }
499
500 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
501 u8 enable = 1;
502 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
503 &enable);
504 }
505
506 return 0;
507}
508
509static void hci_setup_link_policy(struct hci_request *req)
510{
511 struct hci_dev *hdev = req->hdev;
512 struct hci_cp_write_def_link_policy cp;
513 u16 link_policy = 0;
514
515 if (lmp_rswitch_capable(hdev))
516 link_policy |= HCI_LP_RSWITCH;
517 if (lmp_hold_capable(hdev))
518 link_policy |= HCI_LP_HOLD;
519 if (lmp_sniff_capable(hdev))
520 link_policy |= HCI_LP_SNIFF;
521 if (lmp_park_capable(hdev))
522 link_policy |= HCI_LP_PARK;
523
524 cp.policy = cpu_to_le16(link_policy);
525 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
526}
527
528static void hci_set_le_support(struct hci_request *req)
529{
530 struct hci_dev *hdev = req->hdev;
531 struct hci_cp_write_le_host_supported cp;
532
533 /* LE-only devices do not support explicit enablement */
534 if (!lmp_bredr_capable(hdev))
535 return;
536
537 memset(&cp, 0, sizeof(cp));
538
539 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
540 cp.le = 0x01;
541 cp.simul = 0x00;
542 }
543
544 if (cp.le != lmp_host_le_capable(hdev))
545 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
546 &cp);
547}
548
549static void hci_set_event_mask_page_2(struct hci_request *req)
550{
551 struct hci_dev *hdev = req->hdev;
552 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
553
554 /* If Connectionless Slave Broadcast master role is supported
555 * enable all necessary events for it.
556 */
557 if (lmp_csb_master_capable(hdev)) {
558 events[1] |= 0x40; /* Triggered Clock Capture */
559 events[1] |= 0x80; /* Synchronization Train Complete */
560 events[2] |= 0x10; /* Slave Page Response Timeout */
561 events[2] |= 0x20; /* CSB Channel Map Change */
562 }
563
564 /* If Connectionless Slave Broadcast slave role is supported
565 * enable all necessary events for it.
566 */
567 if (lmp_csb_slave_capable(hdev)) {
568 events[2] |= 0x01; /* Synchronization Train Received */
569 events[2] |= 0x02; /* CSB Receive */
570 events[2] |= 0x04; /* CSB Timeout */
571 events[2] |= 0x08; /* Truncated Page Complete */
572 }
573
574 /* Enable Authenticated Payload Timeout Expired event if supported */
575 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
576 events[2] |= 0x80;
577
578 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
579}
580
581static int hci_init3_req(struct hci_request *req, unsigned long opt)
582{
583 struct hci_dev *hdev = req->hdev;
584 u8 p;
585
586 hci_setup_event_mask(req);
587
588 if (hdev->commands[6] & 0x20 &&
589 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
590 struct hci_cp_read_stored_link_key cp;
591
592 bacpy(&cp.bdaddr, BDADDR_ANY);
593 cp.read_all = 0x01;
594 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
595 }
596
597 if (hdev->commands[5] & 0x10)
598 hci_setup_link_policy(req);
599
600 if (hdev->commands[8] & 0x01)
601 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
602
603 /* Some older Broadcom based Bluetooth 1.2 controllers do not
604 * support the Read Page Scan Type command. Check support for
605 * this command in the bit mask of supported commands.
606 */
607 if (hdev->commands[13] & 0x01)
608 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
609
610 if (lmp_le_capable(hdev)) {
611 u8 events[8];
612
613 memset(events, 0, sizeof(events));
614
615 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
616 events[0] |= 0x10; /* LE Long Term Key Request */
617
618 /* If controller supports the Connection Parameters Request
619 * Link Layer Procedure, enable the corresponding event.
620 */
621 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
622 events[0] |= 0x20; /* LE Remote Connection
623 * Parameter Request
624 */
625
626 /* If the controller supports the Data Length Extension
627 * feature, enable the corresponding event.
628 */
629 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
630 events[0] |= 0x40; /* LE Data Length Change */
631
632 /* If the controller supports Extended Scanner Filter
633 * Policies, enable the correspondig event.
634 */
635 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
636 events[1] |= 0x04; /* LE Direct Advertising
637 * Report
638 */
639
640 /* If the controller supports the LE Set Scan Enable command,
641 * enable the corresponding advertising report event.
642 */
643 if (hdev->commands[26] & 0x08)
644 events[0] |= 0x02; /* LE Advertising Report */
645
646 /* If the controller supports the LE Create Connection
647 * command, enable the corresponding event.
648 */
649 if (hdev->commands[26] & 0x10)
650 events[0] |= 0x01; /* LE Connection Complete */
651
652 /* If the controller supports the LE Connection Update
653 * command, enable the corresponding event.
654 */
655 if (hdev->commands[27] & 0x04)
656 events[0] |= 0x04; /* LE Connection Update
657 * Complete
658 */
659
660 /* If the controller supports the LE Read Remote Used Features
661 * command, enable the corresponding event.
662 */
663 if (hdev->commands[27] & 0x20)
664 events[0] |= 0x08; /* LE Read Remote Used
665 * Features Complete
666 */
667
668 /* If the controller supports the LE Read Local P-256
669 * Public Key command, enable the corresponding event.
670 */
671 if (hdev->commands[34] & 0x02)
672 events[0] |= 0x80; /* LE Read Local P-256
673 * Public Key Complete
674 */
675
676 /* If the controller supports the LE Generate DHKey
677 * command, enable the corresponding event.
678 */
679 if (hdev->commands[34] & 0x04)
680 events[1] |= 0x01; /* LE Generate DHKey Complete */
681
682 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
683 events);
684
685 if (hdev->commands[25] & 0x40) {
686 /* Read LE Advertising Channel TX Power */
687 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
688 }
689
690 if (hdev->commands[26] & 0x40) {
691 /* Read LE White List Size */
692 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
693 0, NULL);
694 }
695
696 if (hdev->commands[26] & 0x80) {
697 /* Clear LE White List */
698 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
699 }
700
701 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
702 /* Read LE Maximum Data Length */
703 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
704
705 /* Read LE Suggested Default Data Length */
706 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
707 }
708
709 hci_set_le_support(req);
710 }
711
712 /* Read features beyond page 1 if available */
713 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
714 struct hci_cp_read_local_ext_features cp;
715
716 cp.page = p;
717 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
718 sizeof(cp), &cp);
719 }
720
721 return 0;
722}
723
724static int hci_init4_req(struct hci_request *req, unsigned long opt)
725{
726 struct hci_dev *hdev = req->hdev;
727
728 /* Some Broadcom based Bluetooth controllers do not support the
729 * Delete Stored Link Key command. They are clearly indicating its
730 * absence in the bit mask of supported commands.
731 *
732 * Check the supported commands and only if the the command is marked
733 * as supported send it. If not supported assume that the controller
734 * does not have actual support for stored link keys which makes this
735 * command redundant anyway.
736 *
737 * Some controllers indicate that they support handling deleting
738 * stored link keys, but they don't. The quirk lets a driver
739 * just disable this command.
740 */
741 if (hdev->commands[6] & 0x80 &&
742 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
743 struct hci_cp_delete_stored_link_key cp;
744
745 bacpy(&cp.bdaddr, BDADDR_ANY);
746 cp.delete_all = 0x01;
747 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
748 sizeof(cp), &cp);
749 }
750
751 /* Set event mask page 2 if the HCI command for it is supported */
752 if (hdev->commands[22] & 0x04)
753 hci_set_event_mask_page_2(req);
754
755 /* Read local codec list if the HCI command is supported */
756 if (hdev->commands[29] & 0x20)
757 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
758
759 /* Get MWS transport configuration if the HCI command is supported */
760 if (hdev->commands[30] & 0x08)
761 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
762
763 /* Check for Synchronization Train support */
764 if (lmp_sync_train_capable(hdev))
765 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
766
767 /* Enable Secure Connections if supported and configured */
768 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
769 bredr_sc_enabled(hdev)) {
770 u8 support = 0x01;
771
772 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
773 sizeof(support), &support);
774 }
775
776 return 0;
777}
778
779static int __hci_init(struct hci_dev *hdev)
780{
781 int err;
782
783 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
784 if (err < 0)
785 return err;
786
787 if (hci_dev_test_flag(hdev, HCI_SETUP))
788 hci_debugfs_create_basic(hdev);
789
790 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
791 if (err < 0)
792 return err;
793
794 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
795 * BR/EDR/LE type controllers. AMP controllers only need the
796 * first two stages of init.
797 */
798 if (hdev->dev_type != HCI_BREDR)
799 return 0;
800
801 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
802 if (err < 0)
803 return err;
804
805 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
806 if (err < 0)
807 return err;
808
809 /* This function is only called when the controller is actually in
810 * configured state. When the controller is marked as unconfigured,
811 * this initialization procedure is not run.
812 *
813 * It means that it is possible that a controller runs through its
814 * setup phase and then discovers missing settings. If that is the
815 * case, then this function will not be called. It then will only
816 * be called during the config phase.
817 *
818 * So only when in setup phase or config phase, create the debugfs
819 * entries and register the SMP channels.
820 */
821 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
822 !hci_dev_test_flag(hdev, HCI_CONFIG))
823 return 0;
824
825 hci_debugfs_create_common(hdev);
826
827 if (lmp_bredr_capable(hdev))
828 hci_debugfs_create_bredr(hdev);
829
830 if (lmp_le_capable(hdev))
831 hci_debugfs_create_le(hdev);
832
833 return 0;
834}
835
836static int hci_init0_req(struct hci_request *req, unsigned long opt)
837{
838 struct hci_dev *hdev = req->hdev;
839
840 BT_DBG("%s %ld", hdev->name, opt);
841
842 /* Reset */
843 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
844 hci_reset_req(req, 0);
845
846 /* Read Local Version */
847 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
848
849 /* Read BD Address */
850 if (hdev->set_bdaddr)
851 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
852
853 return 0;
854}
855
856static int __hci_unconf_init(struct hci_dev *hdev)
857{
858 int err;
859
860 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
861 return 0;
862
863 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
864 if (err < 0)
865 return err;
866
867 if (hci_dev_test_flag(hdev, HCI_SETUP))
868 hci_debugfs_create_basic(hdev);
869
870 return 0;
871}
872
873static int hci_scan_req(struct hci_request *req, unsigned long opt)
874{
875 __u8 scan = opt;
876
877 BT_DBG("%s %x", req->hdev->name, scan);
878
879 /* Inquiry and Page scans */
880 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
881 return 0;
882}
883
884static int hci_auth_req(struct hci_request *req, unsigned long opt)
885{
886 __u8 auth = opt;
887
888 BT_DBG("%s %x", req->hdev->name, auth);
889
890 /* Authentication */
891 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
892 return 0;
893}
894
895static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
896{
897 __u8 encrypt = opt;
898
899 BT_DBG("%s %x", req->hdev->name, encrypt);
900
901 /* Encryption */
902 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
903 return 0;
904}
905
906static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
907{
908 __le16 policy = cpu_to_le16(opt);
909
910 BT_DBG("%s %x", req->hdev->name, policy);
911
912 /* Default link policy */
913 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
914 return 0;
915}
916
917/* Get HCI device by index.
918 * Device is held on return. */
919struct hci_dev *hci_dev_get(int index)
920{
921 struct hci_dev *hdev = NULL, *d;
922
923 BT_DBG("%d", index);
924
925 if (index < 0)
926 return NULL;
927
928 read_lock(&hci_dev_list_lock);
929 list_for_each_entry(d, &hci_dev_list, list) {
930 if (d->id == index) {
931 hdev = hci_dev_hold(d);
932 break;
933 }
934 }
935 read_unlock(&hci_dev_list_lock);
936 return hdev;
937}
938
939/* ---- Inquiry support ---- */
940
941bool hci_discovery_active(struct hci_dev *hdev)
942{
943 struct discovery_state *discov = &hdev->discovery;
944
945 switch (discov->state) {
946 case DISCOVERY_FINDING:
947 case DISCOVERY_RESOLVING:
948 return true;
949
950 default:
951 return false;
952 }
953}
954
955void hci_discovery_set_state(struct hci_dev *hdev, int state)
956{
957 int old_state = hdev->discovery.state;
958
959 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
960
961 if (old_state == state)
962 return;
963
964 hdev->discovery.state = state;
965
966 switch (state) {
967 case DISCOVERY_STOPPED:
968 hci_update_background_scan(hdev);
969
970 if (old_state != DISCOVERY_STARTING)
971 mgmt_discovering(hdev, 0);
972 break;
973 case DISCOVERY_STARTING:
974 break;
975 case DISCOVERY_FINDING:
976 mgmt_discovering(hdev, 1);
977 break;
978 case DISCOVERY_RESOLVING:
979 break;
980 case DISCOVERY_STOPPING:
981 break;
982 }
983}
984
985void hci_inquiry_cache_flush(struct hci_dev *hdev)
986{
987 struct discovery_state *cache = &hdev->discovery;
988 struct inquiry_entry *p, *n;
989
990 list_for_each_entry_safe(p, n, &cache->all, all) {
991 list_del(&p->all);
992 kfree(p);
993 }
994
995 INIT_LIST_HEAD(&cache->unknown);
996 INIT_LIST_HEAD(&cache->resolve);
997}
998
999struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1000 bdaddr_t *bdaddr)
1001{
1002 struct discovery_state *cache = &hdev->discovery;
1003 struct inquiry_entry *e;
1004
1005 BT_DBG("cache %p, %pMR", cache, bdaddr);
1006
1007 list_for_each_entry(e, &cache->all, all) {
1008 if (!bacmp(&e->data.bdaddr, bdaddr))
1009 return e;
1010 }
1011
1012 return NULL;
1013}
1014
1015struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1016 bdaddr_t *bdaddr)
1017{
1018 struct discovery_state *cache = &hdev->discovery;
1019 struct inquiry_entry *e;
1020
1021 BT_DBG("cache %p, %pMR", cache, bdaddr);
1022
1023 list_for_each_entry(e, &cache->unknown, list) {
1024 if (!bacmp(&e->data.bdaddr, bdaddr))
1025 return e;
1026 }
1027
1028 return NULL;
1029}
1030
1031struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1032 bdaddr_t *bdaddr,
1033 int state)
1034{
1035 struct discovery_state *cache = &hdev->discovery;
1036 struct inquiry_entry *e;
1037
1038 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1039
1040 list_for_each_entry(e, &cache->resolve, list) {
1041 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1042 return e;
1043 if (!bacmp(&e->data.bdaddr, bdaddr))
1044 return e;
1045 }
1046
1047 return NULL;
1048}
1049
1050void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1051 struct inquiry_entry *ie)
1052{
1053 struct discovery_state *cache = &hdev->discovery;
1054 struct list_head *pos = &cache->resolve;
1055 struct inquiry_entry *p;
1056
1057 list_del(&ie->list);
1058
1059 list_for_each_entry(p, &cache->resolve, list) {
1060 if (p->name_state != NAME_PENDING &&
1061 abs(p->data.rssi) >= abs(ie->data.rssi))
1062 break;
1063 pos = &p->list;
1064 }
1065
1066 list_add(&ie->list, pos);
1067}
1068
1069u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1070 bool name_known)
1071{
1072 struct discovery_state *cache = &hdev->discovery;
1073 struct inquiry_entry *ie;
1074 u32 flags = 0;
1075
1076 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1077
1078 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1079
1080 if (!data->ssp_mode)
1081 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1082
1083 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1084 if (ie) {
1085 if (!ie->data.ssp_mode)
1086 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1087
1088 if (ie->name_state == NAME_NEEDED &&
1089 data->rssi != ie->data.rssi) {
1090 ie->data.rssi = data->rssi;
1091 hci_inquiry_cache_update_resolve(hdev, ie);
1092 }
1093
1094 goto update;
1095 }
1096
1097 /* Entry not in the cache. Add new one. */
1098 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1099 if (!ie) {
1100 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1101 goto done;
1102 }
1103
1104 list_add(&ie->all, &cache->all);
1105
1106 if (name_known) {
1107 ie->name_state = NAME_KNOWN;
1108 } else {
1109 ie->name_state = NAME_NOT_KNOWN;
1110 list_add(&ie->list, &cache->unknown);
1111 }
1112
1113update:
1114 if (name_known && ie->name_state != NAME_KNOWN &&
1115 ie->name_state != NAME_PENDING) {
1116 ie->name_state = NAME_KNOWN;
1117 list_del(&ie->list);
1118 }
1119
1120 memcpy(&ie->data, data, sizeof(*data));
1121 ie->timestamp = jiffies;
1122 cache->timestamp = jiffies;
1123
1124 if (ie->name_state == NAME_NOT_KNOWN)
1125 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1126
1127done:
1128 return flags;
1129}
1130
1131static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1132{
1133 struct discovery_state *cache = &hdev->discovery;
1134 struct inquiry_info *info = (struct inquiry_info *) buf;
1135 struct inquiry_entry *e;
1136 int copied = 0;
1137
1138 list_for_each_entry(e, &cache->all, all) {
1139 struct inquiry_data *data = &e->data;
1140
1141 if (copied >= num)
1142 break;
1143
1144 bacpy(&info->bdaddr, &data->bdaddr);
1145 info->pscan_rep_mode = data->pscan_rep_mode;
1146 info->pscan_period_mode = data->pscan_period_mode;
1147 info->pscan_mode = data->pscan_mode;
1148 memcpy(info->dev_class, data->dev_class, 3);
1149 info->clock_offset = data->clock_offset;
1150
1151 info++;
1152 copied++;
1153 }
1154
1155 BT_DBG("cache %p, copied %d", cache, copied);
1156 return copied;
1157}
1158
1159static int hci_inq_req(struct hci_request *req, unsigned long opt)
1160{
1161 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1162 struct hci_dev *hdev = req->hdev;
1163 struct hci_cp_inquiry cp;
1164
1165 BT_DBG("%s", hdev->name);
1166
1167 if (test_bit(HCI_INQUIRY, &hdev->flags))
1168 return 0;
1169
1170 /* Start Inquiry */
1171 memcpy(&cp.lap, &ir->lap, 3);
1172 cp.length = ir->length;
1173 cp.num_rsp = ir->num_rsp;
1174 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1175
1176 return 0;
1177}
1178
1179int hci_inquiry(void __user *arg)
1180{
1181 __u8 __user *ptr = arg;
1182 struct hci_inquiry_req ir;
1183 struct hci_dev *hdev;
1184 int err = 0, do_inquiry = 0, max_rsp;
1185 long timeo;
1186 __u8 *buf;
1187
1188 if (copy_from_user(&ir, ptr, sizeof(ir)))
1189 return -EFAULT;
1190
1191 hdev = hci_dev_get(ir.dev_id);
1192 if (!hdev)
1193 return -ENODEV;
1194
1195 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1196 err = -EBUSY;
1197 goto done;
1198 }
1199
1200 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1201 err = -EOPNOTSUPP;
1202 goto done;
1203 }
1204
1205 if (hdev->dev_type != HCI_BREDR) {
1206 err = -EOPNOTSUPP;
1207 goto done;
1208 }
1209
1210 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1211 err = -EOPNOTSUPP;
1212 goto done;
1213 }
1214
1215 hci_dev_lock(hdev);
1216 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1217 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1218 hci_inquiry_cache_flush(hdev);
1219 do_inquiry = 1;
1220 }
1221 hci_dev_unlock(hdev);
1222
1223 timeo = ir.length * msecs_to_jiffies(2000);
1224
1225 if (do_inquiry) {
1226 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1227 timeo, NULL);
1228 if (err < 0)
1229 goto done;
1230
1231 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1232 * cleared). If it is interrupted by a signal, return -EINTR.
1233 */
1234 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1235 TASK_INTERRUPTIBLE))
1236 return -EINTR;
1237 }
1238
1239 /* for unlimited number of responses we will use buffer with
1240 * 255 entries
1241 */
1242 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1243
1244 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1245 * copy it to the user space.
1246 */
1247 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1248 if (!buf) {
1249 err = -ENOMEM;
1250 goto done;
1251 }
1252
1253 hci_dev_lock(hdev);
1254 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1255 hci_dev_unlock(hdev);
1256
1257 BT_DBG("num_rsp %d", ir.num_rsp);
1258
1259 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1260 ptr += sizeof(ir);
1261 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1262 ir.num_rsp))
1263 err = -EFAULT;
1264 } else
1265 err = -EFAULT;
1266
1267 kfree(buf);
1268
1269done:
1270 hci_dev_put(hdev);
1271 return err;
1272}
1273
1274static int hci_dev_do_open(struct hci_dev *hdev)
1275{
1276 int ret = 0;
1277
1278 BT_DBG("%s %p", hdev->name, hdev);
1279
1280 hci_req_sync_lock(hdev);
1281
1282 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1283 ret = -ENODEV;
1284 goto done;
1285 }
1286
1287 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1288 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1289 /* Check for rfkill but allow the HCI setup stage to
1290 * proceed (which in itself doesn't cause any RF activity).
1291 */
1292 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1293 ret = -ERFKILL;
1294 goto done;
1295 }
1296
1297 /* Check for valid public address or a configured static
1298 * random adddress, but let the HCI setup proceed to
1299 * be able to determine if there is a public address
1300 * or not.
1301 *
1302 * In case of user channel usage, it is not important
1303 * if a public address or static random address is
1304 * available.
1305 *
1306 * This check is only valid for BR/EDR controllers
1307 * since AMP controllers do not have an address.
1308 */
1309 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1310 hdev->dev_type == HCI_BREDR &&
1311 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1312 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1313 ret = -EADDRNOTAVAIL;
1314 goto done;
1315 }
1316 }
1317
1318 if (test_bit(HCI_UP, &hdev->flags)) {
1319 ret = -EALREADY;
1320 goto done;
1321 }
1322
1323 if (hdev->open(hdev)) {
1324 ret = -EIO;
1325 goto done;
1326 }
1327
1328 set_bit(HCI_RUNNING, &hdev->flags);
1329 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1330
1331 atomic_set(&hdev->cmd_cnt, 1);
1332 set_bit(HCI_INIT, &hdev->flags);
1333
1334 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1335 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1336
1337 if (hdev->setup)
1338 ret = hdev->setup(hdev);
1339
1340 /* The transport driver can set these quirks before
1341 * creating the HCI device or in its setup callback.
1342 *
1343 * In case any of them is set, the controller has to
1344 * start up as unconfigured.
1345 */
1346 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1347 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1348 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1349
1350 /* For an unconfigured controller it is required to
1351 * read at least the version information provided by
1352 * the Read Local Version Information command.
1353 *
1354 * If the set_bdaddr driver callback is provided, then
1355 * also the original Bluetooth public device address
1356 * will be read using the Read BD Address command.
1357 */
1358 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1359 ret = __hci_unconf_init(hdev);
1360 }
1361
1362 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1363 /* If public address change is configured, ensure that
1364 * the address gets programmed. If the driver does not
1365 * support changing the public address, fail the power
1366 * on procedure.
1367 */
1368 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1369 hdev->set_bdaddr)
1370 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1371 else
1372 ret = -EADDRNOTAVAIL;
1373 }
1374
1375 if (!ret) {
1376 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1377 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1378 ret = __hci_init(hdev);
1379 if (!ret && hdev->post_init)
1380 ret = hdev->post_init(hdev);
1381 }
1382 }
1383
1384 /* If the HCI Reset command is clearing all diagnostic settings,
1385 * then they need to be reprogrammed after the init procedure
1386 * completed.
1387 */
1388 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1389 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1390 ret = hdev->set_diag(hdev, true);
1391
1392 clear_bit(HCI_INIT, &hdev->flags);
1393
1394 if (!ret) {
1395 hci_dev_hold(hdev);
1396 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1397 set_bit(HCI_UP, &hdev->flags);
1398 hci_sock_dev_event(hdev, HCI_DEV_UP);
1399 hci_leds_update_powered(hdev, true);
1400 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1401 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1402 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1403 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1404 hci_dev_test_flag(hdev, HCI_MGMT) &&
1405 hdev->dev_type == HCI_BREDR) {
1406 ret = __hci_req_hci_power_on(hdev);
1407 mgmt_power_on(hdev, ret);
1408 }
1409 } else {
1410 /* Init failed, cleanup */
1411 flush_work(&hdev->tx_work);
1412 flush_work(&hdev->cmd_work);
1413 flush_work(&hdev->rx_work);
1414
1415 skb_queue_purge(&hdev->cmd_q);
1416 skb_queue_purge(&hdev->rx_q);
1417
1418 if (hdev->flush)
1419 hdev->flush(hdev);
1420
1421 if (hdev->sent_cmd) {
1422 kfree_skb(hdev->sent_cmd);
1423 hdev->sent_cmd = NULL;
1424 }
1425
1426 clear_bit(HCI_RUNNING, &hdev->flags);
1427 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1428
1429 hdev->close(hdev);
1430 hdev->flags &= BIT(HCI_RAW);
1431 }
1432
1433done:
1434 hci_req_sync_unlock(hdev);
1435 return ret;
1436}
1437
1438/* ---- HCI ioctl helpers ---- */
1439
1440int hci_dev_open(__u16 dev)
1441{
1442 struct hci_dev *hdev;
1443 int err;
1444
1445 hdev = hci_dev_get(dev);
1446 if (!hdev)
1447 return -ENODEV;
1448
1449 /* Devices that are marked as unconfigured can only be powered
1450 * up as user channel. Trying to bring them up as normal devices
1451 * will result into a failure. Only user channel operation is
1452 * possible.
1453 *
1454 * When this function is called for a user channel, the flag
1455 * HCI_USER_CHANNEL will be set first before attempting to
1456 * open the device.
1457 */
1458 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1459 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1460 err = -EOPNOTSUPP;
1461 goto done;
1462 }
1463
1464 /* We need to ensure that no other power on/off work is pending
1465 * before proceeding to call hci_dev_do_open. This is
1466 * particularly important if the setup procedure has not yet
1467 * completed.
1468 */
1469 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1470 cancel_delayed_work(&hdev->power_off);
1471
1472 /* After this call it is guaranteed that the setup procedure
1473 * has finished. This means that error conditions like RFKILL
1474 * or no valid public or static random address apply.
1475 */
1476 flush_workqueue(hdev->req_workqueue);
1477
1478 /* For controllers not using the management interface and that
1479 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1480 * so that pairing works for them. Once the management interface
1481 * is in use this bit will be cleared again and userspace has
1482 * to explicitly enable it.
1483 */
1484 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1485 !hci_dev_test_flag(hdev, HCI_MGMT))
1486 hci_dev_set_flag(hdev, HCI_BONDABLE);
1487
1488 err = hci_dev_do_open(hdev);
1489
1490done:
1491 hci_dev_put(hdev);
1492 return err;
1493}
1494
1495/* This function requires the caller holds hdev->lock */
1496static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1497{
1498 struct hci_conn_params *p;
1499
1500 list_for_each_entry(p, &hdev->le_conn_params, list) {
1501 if (p->conn) {
1502 hci_conn_drop(p->conn);
1503 hci_conn_put(p->conn);
1504 p->conn = NULL;
1505 }
1506 list_del_init(&p->action);
1507 }
1508
1509 BT_DBG("All LE pending actions cleared");
1510}
1511
1512int hci_dev_do_close(struct hci_dev *hdev)
1513{
1514 bool auto_off;
1515
1516 BT_DBG("%s %p", hdev->name, hdev);
1517
1518 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1519 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1520 test_bit(HCI_UP, &hdev->flags)) {
1521 /* Execute vendor specific shutdown routine */
1522 if (hdev->shutdown)
1523 hdev->shutdown(hdev);
1524 }
1525
1526 cancel_delayed_work(&hdev->power_off);
1527
1528 hci_request_cancel_all(hdev);
1529 hci_req_sync_lock(hdev);
1530
1531 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1532 cancel_delayed_work_sync(&hdev->cmd_timer);
1533 hci_req_sync_unlock(hdev);
1534 return 0;
1535 }
1536
1537 hci_leds_update_powered(hdev, false);
1538
1539 /* Flush RX and TX works */
1540 flush_work(&hdev->tx_work);
1541 flush_work(&hdev->rx_work);
1542
1543 if (hdev->discov_timeout > 0) {
1544 hdev->discov_timeout = 0;
1545 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1546 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1547 }
1548
1549 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1550 cancel_delayed_work(&hdev->service_cache);
1551
1552 if (hci_dev_test_flag(hdev, HCI_MGMT))
1553 cancel_delayed_work_sync(&hdev->rpa_expired);
1554
1555 /* Avoid potential lockdep warnings from the *_flush() calls by
1556 * ensuring the workqueue is empty up front.
1557 */
1558 drain_workqueue(hdev->workqueue);
1559
1560 hci_dev_lock(hdev);
1561
1562 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1563
1564 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1565
1566 if (!auto_off && hdev->dev_type == HCI_BREDR &&
1567 hci_dev_test_flag(hdev, HCI_MGMT))
1568 __mgmt_power_off(hdev);
1569
1570 hci_inquiry_cache_flush(hdev);
1571 hci_pend_le_actions_clear(hdev);
1572 hci_conn_hash_flush(hdev);
1573 hci_dev_unlock(hdev);
1574
1575 smp_unregister(hdev);
1576
1577 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1578
1579 if (hdev->flush)
1580 hdev->flush(hdev);
1581
1582 /* Reset device */
1583 skb_queue_purge(&hdev->cmd_q);
1584 atomic_set(&hdev->cmd_cnt, 1);
1585 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1586 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1587 set_bit(HCI_INIT, &hdev->flags);
1588 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1589 clear_bit(HCI_INIT, &hdev->flags);
1590 }
1591
1592 /* flush cmd work */
1593 flush_work(&hdev->cmd_work);
1594
1595 /* Drop queues */
1596 skb_queue_purge(&hdev->rx_q);
1597 skb_queue_purge(&hdev->cmd_q);
1598 skb_queue_purge(&hdev->raw_q);
1599
1600 /* Drop last sent command */
1601 if (hdev->sent_cmd) {
1602 cancel_delayed_work_sync(&hdev->cmd_timer);
1603 kfree_skb(hdev->sent_cmd);
1604 hdev->sent_cmd = NULL;
1605 }
1606
1607 clear_bit(HCI_RUNNING, &hdev->flags);
1608 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1609
1610 /* After this point our queues are empty
1611 * and no tasks are scheduled. */
1612 hdev->close(hdev);
1613
1614 /* Clear flags */
1615 hdev->flags &= BIT(HCI_RAW);
1616 hci_dev_clear_volatile_flags(hdev);
1617
1618 /* Controller radio is available but is currently powered down */
1619 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1620
1621 memset(hdev->eir, 0, sizeof(hdev->eir));
1622 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1623 bacpy(&hdev->random_addr, BDADDR_ANY);
1624
1625 hci_req_sync_unlock(hdev);
1626
1627 hci_dev_put(hdev);
1628 return 0;
1629}
1630
1631int hci_dev_close(__u16 dev)
1632{
1633 struct hci_dev *hdev;
1634 int err;
1635
1636 hdev = hci_dev_get(dev);
1637 if (!hdev)
1638 return -ENODEV;
1639
1640 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1641 err = -EBUSY;
1642 goto done;
1643 }
1644
1645 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1646 cancel_delayed_work(&hdev->power_off);
1647
1648 err = hci_dev_do_close(hdev);
1649
1650done:
1651 hci_dev_put(hdev);
1652 return err;
1653}
1654
1655static int hci_dev_do_reset(struct hci_dev *hdev)
1656{
1657 int ret;
1658
1659 BT_DBG("%s %p", hdev->name, hdev);
1660
1661 hci_req_sync_lock(hdev);
1662
1663 /* Drop queues */
1664 skb_queue_purge(&hdev->rx_q);
1665 skb_queue_purge(&hdev->cmd_q);
1666
1667 /* Avoid potential lockdep warnings from the *_flush() calls by
1668 * ensuring the workqueue is empty up front.
1669 */
1670 drain_workqueue(hdev->workqueue);
1671
1672 hci_dev_lock(hdev);
1673 hci_inquiry_cache_flush(hdev);
1674 hci_conn_hash_flush(hdev);
1675 hci_dev_unlock(hdev);
1676
1677 if (hdev->flush)
1678 hdev->flush(hdev);
1679
1680 atomic_set(&hdev->cmd_cnt, 1);
1681 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1682
1683 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1684
1685 hci_req_sync_unlock(hdev);
1686 return ret;
1687}
1688
1689int hci_dev_reset(__u16 dev)
1690{
1691 struct hci_dev *hdev;
1692 int err;
1693
1694 hdev = hci_dev_get(dev);
1695 if (!hdev)
1696 return -ENODEV;
1697
1698 if (!test_bit(HCI_UP, &hdev->flags)) {
1699 err = -ENETDOWN;
1700 goto done;
1701 }
1702
1703 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1704 err = -EBUSY;
1705 goto done;
1706 }
1707
1708 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1709 err = -EOPNOTSUPP;
1710 goto done;
1711 }
1712
1713 err = hci_dev_do_reset(hdev);
1714
1715done:
1716 hci_dev_put(hdev);
1717 return err;
1718}
1719
1720int hci_dev_reset_stat(__u16 dev)
1721{
1722 struct hci_dev *hdev;
1723 int ret = 0;
1724
1725 hdev = hci_dev_get(dev);
1726 if (!hdev)
1727 return -ENODEV;
1728
1729 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1730 ret = -EBUSY;
1731 goto done;
1732 }
1733
1734 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1735 ret = -EOPNOTSUPP;
1736 goto done;
1737 }
1738
1739 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1740
1741done:
1742 hci_dev_put(hdev);
1743 return ret;
1744}
1745
1746static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1747{
1748 bool conn_changed, discov_changed;
1749
1750 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1751
1752 if ((scan & SCAN_PAGE))
1753 conn_changed = !hci_dev_test_and_set_flag(hdev,
1754 HCI_CONNECTABLE);
1755 else
1756 conn_changed = hci_dev_test_and_clear_flag(hdev,
1757 HCI_CONNECTABLE);
1758
1759 if ((scan & SCAN_INQUIRY)) {
1760 discov_changed = !hci_dev_test_and_set_flag(hdev,
1761 HCI_DISCOVERABLE);
1762 } else {
1763 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1764 discov_changed = hci_dev_test_and_clear_flag(hdev,
1765 HCI_DISCOVERABLE);
1766 }
1767
1768 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1769 return;
1770
1771 if (conn_changed || discov_changed) {
1772 /* In case this was disabled through mgmt */
1773 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1774
1775 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1776 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1777
1778 mgmt_new_settings(hdev);
1779 }
1780}
1781
1782int hci_dev_cmd(unsigned int cmd, void __user *arg)
1783{
1784 struct hci_dev *hdev;
1785 struct hci_dev_req dr;
1786 int err = 0;
1787
1788 if (copy_from_user(&dr, arg, sizeof(dr)))
1789 return -EFAULT;
1790
1791 hdev = hci_dev_get(dr.dev_id);
1792 if (!hdev)
1793 return -ENODEV;
1794
1795 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1796 err = -EBUSY;
1797 goto done;
1798 }
1799
1800 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1801 err = -EOPNOTSUPP;
1802 goto done;
1803 }
1804
1805 if (hdev->dev_type != HCI_BREDR) {
1806 err = -EOPNOTSUPP;
1807 goto done;
1808 }
1809
1810 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1811 err = -EOPNOTSUPP;
1812 goto done;
1813 }
1814
1815 switch (cmd) {
1816 case HCISETAUTH:
1817 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1818 HCI_INIT_TIMEOUT, NULL);
1819 break;
1820
1821 case HCISETENCRYPT:
1822 if (!lmp_encrypt_capable(hdev)) {
1823 err = -EOPNOTSUPP;
1824 break;
1825 }
1826
1827 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1828 /* Auth must be enabled first */
1829 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1830 HCI_INIT_TIMEOUT, NULL);
1831 if (err)
1832 break;
1833 }
1834
1835 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1836 HCI_INIT_TIMEOUT, NULL);
1837 break;
1838
1839 case HCISETSCAN:
1840 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1841 HCI_INIT_TIMEOUT, NULL);
1842
1843 /* Ensure that the connectable and discoverable states
1844 * get correctly modified as this was a non-mgmt change.
1845 */
1846 if (!err)
1847 hci_update_scan_state(hdev, dr.dev_opt);
1848 break;
1849
1850 case HCISETLINKPOL:
1851 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1852 HCI_INIT_TIMEOUT, NULL);
1853 break;
1854
1855 case HCISETLINKMODE:
1856 hdev->link_mode = ((__u16) dr.dev_opt) &
1857 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1858 break;
1859
1860 case HCISETPTYPE:
1861 hdev->pkt_type = (__u16) dr.dev_opt;
1862 break;
1863
1864 case HCISETACLMTU:
1865 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1866 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1867 break;
1868
1869 case HCISETSCOMTU:
1870 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1871 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1872 break;
1873
1874 default:
1875 err = -EINVAL;
1876 break;
1877 }
1878
1879done:
1880 hci_dev_put(hdev);
1881 return err;
1882}
1883
1884int hci_get_dev_list(void __user *arg)
1885{
1886 struct hci_dev *hdev;
1887 struct hci_dev_list_req *dl;
1888 struct hci_dev_req *dr;
1889 int n = 0, size, err;
1890 __u16 dev_num;
1891
1892 if (get_user(dev_num, (__u16 __user *) arg))
1893 return -EFAULT;
1894
1895 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1896 return -EINVAL;
1897
1898 size = sizeof(*dl) + dev_num * sizeof(*dr);
1899
1900 dl = kzalloc(size, GFP_KERNEL);
1901 if (!dl)
1902 return -ENOMEM;
1903
1904 dr = dl->dev_req;
1905
1906 read_lock(&hci_dev_list_lock);
1907 list_for_each_entry(hdev, &hci_dev_list, list) {
1908 unsigned long flags = hdev->flags;
1909
1910 /* When the auto-off is configured it means the transport
1911 * is running, but in that case still indicate that the
1912 * device is actually down.
1913 */
1914 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1915 flags &= ~BIT(HCI_UP);
1916
1917 (dr + n)->dev_id = hdev->id;
1918 (dr + n)->dev_opt = flags;
1919
1920 if (++n >= dev_num)
1921 break;
1922 }
1923 read_unlock(&hci_dev_list_lock);
1924
1925 dl->dev_num = n;
1926 size = sizeof(*dl) + n * sizeof(*dr);
1927
1928 err = copy_to_user(arg, dl, size);
1929 kfree(dl);
1930
1931 return err ? -EFAULT : 0;
1932}
1933
1934int hci_get_dev_info(void __user *arg)
1935{
1936 struct hci_dev *hdev;
1937 struct hci_dev_info di;
1938 unsigned long flags;
1939 int err = 0;
1940
1941 if (copy_from_user(&di, arg, sizeof(di)))
1942 return -EFAULT;
1943
1944 hdev = hci_dev_get(di.dev_id);
1945 if (!hdev)
1946 return -ENODEV;
1947
1948 /* When the auto-off is configured it means the transport
1949 * is running, but in that case still indicate that the
1950 * device is actually down.
1951 */
1952 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1953 flags = hdev->flags & ~BIT(HCI_UP);
1954 else
1955 flags = hdev->flags;
1956
1957 strcpy(di.name, hdev->name);
1958 di.bdaddr = hdev->bdaddr;
1959 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
1960 di.flags = flags;
1961 di.pkt_type = hdev->pkt_type;
1962 if (lmp_bredr_capable(hdev)) {
1963 di.acl_mtu = hdev->acl_mtu;
1964 di.acl_pkts = hdev->acl_pkts;
1965 di.sco_mtu = hdev->sco_mtu;
1966 di.sco_pkts = hdev->sco_pkts;
1967 } else {
1968 di.acl_mtu = hdev->le_mtu;
1969 di.acl_pkts = hdev->le_pkts;
1970 di.sco_mtu = 0;
1971 di.sco_pkts = 0;
1972 }
1973 di.link_policy = hdev->link_policy;
1974 di.link_mode = hdev->link_mode;
1975
1976 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1977 memcpy(&di.features, &hdev->features, sizeof(di.features));
1978
1979 if (copy_to_user(arg, &di, sizeof(di)))
1980 err = -EFAULT;
1981
1982 hci_dev_put(hdev);
1983
1984 return err;
1985}
1986
1987/* ---- Interface to HCI drivers ---- */
1988
1989static int hci_rfkill_set_block(void *data, bool blocked)
1990{
1991 struct hci_dev *hdev = data;
1992
1993 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1994
1995 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
1996 return -EBUSY;
1997
1998 if (blocked) {
1999 hci_dev_set_flag(hdev, HCI_RFKILLED);
2000 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2001 !hci_dev_test_flag(hdev, HCI_CONFIG))
2002 hci_dev_do_close(hdev);
2003 } else {
2004 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2005 }
2006
2007 return 0;
2008}
2009
2010static const struct rfkill_ops hci_rfkill_ops = {
2011 .set_block = hci_rfkill_set_block,
2012};
2013
2014static void hci_power_on(struct work_struct *work)
2015{
2016 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2017 int err;
2018
2019 BT_DBG("%s", hdev->name);
2020
2021 if (test_bit(HCI_UP, &hdev->flags) &&
2022 hci_dev_test_flag(hdev, HCI_MGMT) &&
2023 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2024 cancel_delayed_work(&hdev->power_off);
2025 hci_req_sync_lock(hdev);
2026 err = __hci_req_hci_power_on(hdev);
2027 hci_req_sync_unlock(hdev);
2028 mgmt_power_on(hdev, err);
2029 return;
2030 }
2031
2032 err = hci_dev_do_open(hdev);
2033 if (err < 0) {
2034 hci_dev_lock(hdev);
2035 mgmt_set_powered_failed(hdev, err);
2036 hci_dev_unlock(hdev);
2037 return;
2038 }
2039
2040 /* During the HCI setup phase, a few error conditions are
2041 * ignored and they need to be checked now. If they are still
2042 * valid, it is important to turn the device back off.
2043 */
2044 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2045 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2046 (hdev->dev_type == HCI_BREDR &&
2047 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2048 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2049 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2050 hci_dev_do_close(hdev);
2051 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2052 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2053 HCI_AUTO_OFF_TIMEOUT);
2054 }
2055
2056 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2057 /* For unconfigured devices, set the HCI_RAW flag
2058 * so that userspace can easily identify them.
2059 */
2060 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2061 set_bit(HCI_RAW, &hdev->flags);
2062
2063 /* For fully configured devices, this will send
2064 * the Index Added event. For unconfigured devices,
2065 * it will send Unconfigued Index Added event.
2066 *
2067 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2068 * and no event will be send.
2069 */
2070 mgmt_index_added(hdev);
2071 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2072 /* When the controller is now configured, then it
2073 * is important to clear the HCI_RAW flag.
2074 */
2075 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2076 clear_bit(HCI_RAW, &hdev->flags);
2077
2078 /* Powering on the controller with HCI_CONFIG set only
2079 * happens with the transition from unconfigured to
2080 * configured. This will send the Index Added event.
2081 */
2082 mgmt_index_added(hdev);
2083 }
2084}
2085
2086static void hci_power_off(struct work_struct *work)
2087{
2088 struct hci_dev *hdev = container_of(work, struct hci_dev,
2089 power_off.work);
2090
2091 BT_DBG("%s", hdev->name);
2092
2093 hci_dev_do_close(hdev);
2094}
2095
2096static void hci_error_reset(struct work_struct *work)
2097{
2098 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2099
2100 BT_DBG("%s", hdev->name);
2101
2102 if (hdev->hw_error)
2103 hdev->hw_error(hdev, hdev->hw_error_code);
2104 else
2105 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2106 hdev->hw_error_code);
2107
2108 if (hci_dev_do_close(hdev))
2109 return;
2110
2111 hci_dev_do_open(hdev);
2112}
2113
2114void hci_uuids_clear(struct hci_dev *hdev)
2115{
2116 struct bt_uuid *uuid, *tmp;
2117
2118 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2119 list_del(&uuid->list);
2120 kfree(uuid);
2121 }
2122}
2123
2124void hci_link_keys_clear(struct hci_dev *hdev)
2125{
2126 struct link_key *key;
2127
2128 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2129 list_del_rcu(&key->list);
2130 kfree_rcu(key, rcu);
2131 }
2132}
2133
2134void hci_smp_ltks_clear(struct hci_dev *hdev)
2135{
2136 struct smp_ltk *k;
2137
2138 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2139 list_del_rcu(&k->list);
2140 kfree_rcu(k, rcu);
2141 }
2142}
2143
2144void hci_smp_irks_clear(struct hci_dev *hdev)
2145{
2146 struct smp_irk *k;
2147
2148 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2149 list_del_rcu(&k->list);
2150 kfree_rcu(k, rcu);
2151 }
2152}
2153
2154struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2155{
2156 struct link_key *k;
2157
2158 rcu_read_lock();
2159 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2160 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2161 rcu_read_unlock();
2162 return k;
2163 }
2164 }
2165 rcu_read_unlock();
2166
2167 return NULL;
2168}
2169
2170static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2171 u8 key_type, u8 old_key_type)
2172{
2173 /* Legacy key */
2174 if (key_type < 0x03)
2175 return true;
2176
2177 /* Debug keys are insecure so don't store them persistently */
2178 if (key_type == HCI_LK_DEBUG_COMBINATION)
2179 return false;
2180
2181 /* Changed combination key and there's no previous one */
2182 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2183 return false;
2184
2185 /* Security mode 3 case */
2186 if (!conn)
2187 return true;
2188
2189 /* BR/EDR key derived using SC from an LE link */
2190 if (conn->type == LE_LINK)
2191 return true;
2192
2193 /* Neither local nor remote side had no-bonding as requirement */
2194 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2195 return true;
2196
2197 /* Local side had dedicated bonding as requirement */
2198 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2199 return true;
2200
2201 /* Remote side had dedicated bonding as requirement */
2202 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2203 return true;
2204
2205 /* If none of the above criteria match, then don't store the key
2206 * persistently */
2207 return false;
2208}
2209
2210static u8 ltk_role(u8 type)
2211{
2212 if (type == SMP_LTK)
2213 return HCI_ROLE_MASTER;
2214
2215 return HCI_ROLE_SLAVE;
2216}
2217
2218struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2219 u8 addr_type, u8 role)
2220{
2221 struct smp_ltk *k;
2222
2223 rcu_read_lock();
2224 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2225 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2226 continue;
2227
2228 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2229 rcu_read_unlock();
2230 return k;
2231 }
2232 }
2233 rcu_read_unlock();
2234
2235 return NULL;
2236}
2237
2238struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2239{
2240 struct smp_irk *irk;
2241
2242 rcu_read_lock();
2243 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2244 if (!bacmp(&irk->rpa, rpa)) {
2245 rcu_read_unlock();
2246 return irk;
2247 }
2248 }
2249
2250 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2251 if (smp_irk_matches(hdev, irk->val, rpa)) {
2252 bacpy(&irk->rpa, rpa);
2253 rcu_read_unlock();
2254 return irk;
2255 }
2256 }
2257 rcu_read_unlock();
2258
2259 return NULL;
2260}
2261
2262struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2263 u8 addr_type)
2264{
2265 struct smp_irk *irk;
2266
2267 /* Identity Address must be public or static random */
2268 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2269 return NULL;
2270
2271 rcu_read_lock();
2272 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2273 if (addr_type == irk->addr_type &&
2274 bacmp(bdaddr, &irk->bdaddr) == 0) {
2275 rcu_read_unlock();
2276 return irk;
2277 }
2278 }
2279 rcu_read_unlock();
2280
2281 return NULL;
2282}
2283
2284struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2285 bdaddr_t *bdaddr, u8 *val, u8 type,
2286 u8 pin_len, bool *persistent)
2287{
2288 struct link_key *key, *old_key;
2289 u8 old_key_type;
2290
2291 old_key = hci_find_link_key(hdev, bdaddr);
2292 if (old_key) {
2293 old_key_type = old_key->type;
2294 key = old_key;
2295 } else {
2296 old_key_type = conn ? conn->key_type : 0xff;
2297 key = kzalloc(sizeof(*key), GFP_KERNEL);
2298 if (!key)
2299 return NULL;
2300 list_add_rcu(&key->list, &hdev->link_keys);
2301 }
2302
2303 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2304
2305 /* Some buggy controller combinations generate a changed
2306 * combination key for legacy pairing even when there's no
2307 * previous key */
2308 if (type == HCI_LK_CHANGED_COMBINATION &&
2309 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2310 type = HCI_LK_COMBINATION;
2311 if (conn)
2312 conn->key_type = type;
2313 }
2314
2315 bacpy(&key->bdaddr, bdaddr);
2316 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2317 key->pin_len = pin_len;
2318
2319 if (type == HCI_LK_CHANGED_COMBINATION)
2320 key->type = old_key_type;
2321 else
2322 key->type = type;
2323
2324 if (persistent)
2325 *persistent = hci_persistent_key(hdev, conn, type,
2326 old_key_type);
2327
2328 return key;
2329}
2330
2331struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2332 u8 addr_type, u8 type, u8 authenticated,
2333 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2334{
2335 struct smp_ltk *key, *old_key;
2336 u8 role = ltk_role(type);
2337
2338 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2339 if (old_key)
2340 key = old_key;
2341 else {
2342 key = kzalloc(sizeof(*key), GFP_KERNEL);
2343 if (!key)
2344 return NULL;
2345 list_add_rcu(&key->list, &hdev->long_term_keys);
2346 }
2347
2348 bacpy(&key->bdaddr, bdaddr);
2349 key->bdaddr_type = addr_type;
2350 memcpy(key->val, tk, sizeof(key->val));
2351 key->authenticated = authenticated;
2352 key->ediv = ediv;
2353 key->rand = rand;
2354 key->enc_size = enc_size;
2355 key->type = type;
2356
2357 return key;
2358}
2359
2360struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2361 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2362{
2363 struct smp_irk *irk;
2364
2365 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2366 if (!irk) {
2367 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2368 if (!irk)
2369 return NULL;
2370
2371 bacpy(&irk->bdaddr, bdaddr);
2372 irk->addr_type = addr_type;
2373
2374 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2375 }
2376
2377 memcpy(irk->val, val, 16);
2378 bacpy(&irk->rpa, rpa);
2379
2380 return irk;
2381}
2382
2383int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2384{
2385 struct link_key *key;
2386
2387 key = hci_find_link_key(hdev, bdaddr);
2388 if (!key)
2389 return -ENOENT;
2390
2391 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2392
2393 list_del_rcu(&key->list);
2394 kfree_rcu(key, rcu);
2395
2396 return 0;
2397}
2398
2399int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2400{
2401 struct smp_ltk *k;
2402 int removed = 0;
2403
2404 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2405 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2406 continue;
2407
2408 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2409
2410 list_del_rcu(&k->list);
2411 kfree_rcu(k, rcu);
2412 removed++;
2413 }
2414
2415 return removed ? 0 : -ENOENT;
2416}
2417
2418void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2419{
2420 struct smp_irk *k;
2421
2422 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2423 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2424 continue;
2425
2426 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2427
2428 list_del_rcu(&k->list);
2429 kfree_rcu(k, rcu);
2430 }
2431}
2432
2433bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2434{
2435 struct smp_ltk *k;
2436 struct smp_irk *irk;
2437 u8 addr_type;
2438
2439 if (type == BDADDR_BREDR) {
2440 if (hci_find_link_key(hdev, bdaddr))
2441 return true;
2442 return false;
2443 }
2444
2445 /* Convert to HCI addr type which struct smp_ltk uses */
2446 if (type == BDADDR_LE_PUBLIC)
2447 addr_type = ADDR_LE_DEV_PUBLIC;
2448 else
2449 addr_type = ADDR_LE_DEV_RANDOM;
2450
2451 irk = hci_get_irk(hdev, bdaddr, addr_type);
2452 if (irk) {
2453 bdaddr = &irk->bdaddr;
2454 addr_type = irk->addr_type;
2455 }
2456
2457 rcu_read_lock();
2458 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2459 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2460 rcu_read_unlock();
2461 return true;
2462 }
2463 }
2464 rcu_read_unlock();
2465
2466 return false;
2467}
2468
2469/* HCI command timer function */
2470static void hci_cmd_timeout(struct work_struct *work)
2471{
2472 struct hci_dev *hdev = container_of(work, struct hci_dev,
2473 cmd_timer.work);
2474
2475 if (hdev->sent_cmd) {
2476 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2477 u16 opcode = __le16_to_cpu(sent->opcode);
2478
2479 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2480 } else {
2481 BT_ERR("%s command tx timeout", hdev->name);
2482 }
2483
2484 atomic_set(&hdev->cmd_cnt, 1);
2485 queue_work(hdev->workqueue, &hdev->cmd_work);
2486}
2487
2488struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2489 bdaddr_t *bdaddr, u8 bdaddr_type)
2490{
2491 struct oob_data *data;
2492
2493 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2494 if (bacmp(bdaddr, &data->bdaddr) != 0)
2495 continue;
2496 if (data->bdaddr_type != bdaddr_type)
2497 continue;
2498 return data;
2499 }
2500
2501 return NULL;
2502}
2503
2504int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2505 u8 bdaddr_type)
2506{
2507 struct oob_data *data;
2508
2509 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2510 if (!data)
2511 return -ENOENT;
2512
2513 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2514
2515 list_del(&data->list);
2516 kfree(data);
2517
2518 return 0;
2519}
2520
2521void hci_remote_oob_data_clear(struct hci_dev *hdev)
2522{
2523 struct oob_data *data, *n;
2524
2525 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2526 list_del(&data->list);
2527 kfree(data);
2528 }
2529}
2530
2531int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2532 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2533 u8 *hash256, u8 *rand256)
2534{
2535 struct oob_data *data;
2536
2537 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2538 if (!data) {
2539 data = kmalloc(sizeof(*data), GFP_KERNEL);
2540 if (!data)
2541 return -ENOMEM;
2542
2543 bacpy(&data->bdaddr, bdaddr);
2544 data->bdaddr_type = bdaddr_type;
2545 list_add(&data->list, &hdev->remote_oob_data);
2546 }
2547
2548 if (hash192 && rand192) {
2549 memcpy(data->hash192, hash192, sizeof(data->hash192));
2550 memcpy(data->rand192, rand192, sizeof(data->rand192));
2551 if (hash256 && rand256)
2552 data->present = 0x03;
2553 } else {
2554 memset(data->hash192, 0, sizeof(data->hash192));
2555 memset(data->rand192, 0, sizeof(data->rand192));
2556 if (hash256 && rand256)
2557 data->present = 0x02;
2558 else
2559 data->present = 0x00;
2560 }
2561
2562 if (hash256 && rand256) {
2563 memcpy(data->hash256, hash256, sizeof(data->hash256));
2564 memcpy(data->rand256, rand256, sizeof(data->rand256));
2565 } else {
2566 memset(data->hash256, 0, sizeof(data->hash256));
2567 memset(data->rand256, 0, sizeof(data->rand256));
2568 if (hash192 && rand192)
2569 data->present = 0x01;
2570 }
2571
2572 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2573
2574 return 0;
2575}
2576
2577/* This function requires the caller holds hdev->lock */
2578struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2579{
2580 struct adv_info *adv_instance;
2581
2582 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2583 if (adv_instance->instance == instance)
2584 return adv_instance;
2585 }
2586
2587 return NULL;
2588}
2589
2590/* This function requires the caller holds hdev->lock */
2591struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2592{
2593 struct adv_info *cur_instance;
2594
2595 cur_instance = hci_find_adv_instance(hdev, instance);
2596 if (!cur_instance)
2597 return NULL;
2598
2599 if (cur_instance == list_last_entry(&hdev->adv_instances,
2600 struct adv_info, list))
2601 return list_first_entry(&hdev->adv_instances,
2602 struct adv_info, list);
2603 else
2604 return list_next_entry(cur_instance, list);
2605}
2606
2607/* This function requires the caller holds hdev->lock */
2608int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2609{
2610 struct adv_info *adv_instance;
2611
2612 adv_instance = hci_find_adv_instance(hdev, instance);
2613 if (!adv_instance)
2614 return -ENOENT;
2615
2616 BT_DBG("%s removing %dMR", hdev->name, instance);
2617
2618 if (hdev->cur_adv_instance == instance) {
2619 if (hdev->adv_instance_timeout) {
2620 cancel_delayed_work(&hdev->adv_instance_expire);
2621 hdev->adv_instance_timeout = 0;
2622 }
2623 hdev->cur_adv_instance = 0x00;
2624 }
2625
2626 list_del(&adv_instance->list);
2627 kfree(adv_instance);
2628
2629 hdev->adv_instance_cnt--;
2630
2631 return 0;
2632}
2633
2634/* This function requires the caller holds hdev->lock */
2635void hci_adv_instances_clear(struct hci_dev *hdev)
2636{
2637 struct adv_info *adv_instance, *n;
2638
2639 if (hdev->adv_instance_timeout) {
2640 cancel_delayed_work(&hdev->adv_instance_expire);
2641 hdev->adv_instance_timeout = 0;
2642 }
2643
2644 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2645 list_del(&adv_instance->list);
2646 kfree(adv_instance);
2647 }
2648
2649 hdev->adv_instance_cnt = 0;
2650 hdev->cur_adv_instance = 0x00;
2651}
2652
2653/* This function requires the caller holds hdev->lock */
2654int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2655 u16 adv_data_len, u8 *adv_data,
2656 u16 scan_rsp_len, u8 *scan_rsp_data,
2657 u16 timeout, u16 duration)
2658{
2659 struct adv_info *adv_instance;
2660
2661 adv_instance = hci_find_adv_instance(hdev, instance);
2662 if (adv_instance) {
2663 memset(adv_instance->adv_data, 0,
2664 sizeof(adv_instance->adv_data));
2665 memset(adv_instance->scan_rsp_data, 0,
2666 sizeof(adv_instance->scan_rsp_data));
2667 } else {
2668 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2669 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2670 return -EOVERFLOW;
2671
2672 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2673 if (!adv_instance)
2674 return -ENOMEM;
2675
2676 adv_instance->pending = true;
2677 adv_instance->instance = instance;
2678 list_add(&adv_instance->list, &hdev->adv_instances);
2679 hdev->adv_instance_cnt++;
2680 }
2681
2682 adv_instance->flags = flags;
2683 adv_instance->adv_data_len = adv_data_len;
2684 adv_instance->scan_rsp_len = scan_rsp_len;
2685
2686 if (adv_data_len)
2687 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2688
2689 if (scan_rsp_len)
2690 memcpy(adv_instance->scan_rsp_data,
2691 scan_rsp_data, scan_rsp_len);
2692
2693 adv_instance->timeout = timeout;
2694 adv_instance->remaining_time = timeout;
2695
2696 if (duration == 0)
2697 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2698 else
2699 adv_instance->duration = duration;
2700
2701 BT_DBG("%s for %dMR", hdev->name, instance);
2702
2703 return 0;
2704}
2705
2706struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2707 bdaddr_t *bdaddr, u8 type)
2708{
2709 struct bdaddr_list *b;
2710
2711 list_for_each_entry(b, bdaddr_list, list) {
2712 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2713 return b;
2714 }
2715
2716 return NULL;
2717}
2718
2719void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2720{
2721 struct bdaddr_list *b, *n;
2722
2723 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2724 list_del(&b->list);
2725 kfree(b);
2726 }
2727}
2728
2729int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2730{
2731 struct bdaddr_list *entry;
2732
2733 if (!bacmp(bdaddr, BDADDR_ANY))
2734 return -EBADF;
2735
2736 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2737 return -EEXIST;
2738
2739 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2740 if (!entry)
2741 return -ENOMEM;
2742
2743 bacpy(&entry->bdaddr, bdaddr);
2744 entry->bdaddr_type = type;
2745
2746 list_add(&entry->list, list);
2747
2748 return 0;
2749}
2750
2751int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2752{
2753 struct bdaddr_list *entry;
2754
2755 if (!bacmp(bdaddr, BDADDR_ANY)) {
2756 hci_bdaddr_list_clear(list);
2757 return 0;
2758 }
2759
2760 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2761 if (!entry)
2762 return -ENOENT;
2763
2764 list_del(&entry->list);
2765 kfree(entry);
2766
2767 return 0;
2768}
2769
2770/* This function requires the caller holds hdev->lock */
2771struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2772 bdaddr_t *addr, u8 addr_type)
2773{
2774 struct hci_conn_params *params;
2775
2776 list_for_each_entry(params, &hdev->le_conn_params, list) {
2777 if (bacmp(¶ms->addr, addr) == 0 &&
2778 params->addr_type == addr_type) {
2779 return params;
2780 }
2781 }
2782
2783 return NULL;
2784}
2785
2786/* This function requires the caller holds hdev->lock */
2787struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2788 bdaddr_t *addr, u8 addr_type)
2789{
2790 struct hci_conn_params *param;
2791
2792 list_for_each_entry(param, list, action) {
2793 if (bacmp(¶m->addr, addr) == 0 &&
2794 param->addr_type == addr_type)
2795 return param;
2796 }
2797
2798 return NULL;
2799}
2800
2801/* This function requires the caller holds hdev->lock */
2802struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2803 bdaddr_t *addr, u8 addr_type)
2804{
2805 struct hci_conn_params *params;
2806
2807 params = hci_conn_params_lookup(hdev, addr, addr_type);
2808 if (params)
2809 return params;
2810
2811 params = kzalloc(sizeof(*params), GFP_KERNEL);
2812 if (!params) {
2813 BT_ERR("Out of memory");
2814 return NULL;
2815 }
2816
2817 bacpy(¶ms->addr, addr);
2818 params->addr_type = addr_type;
2819
2820 list_add(¶ms->list, &hdev->le_conn_params);
2821 INIT_LIST_HEAD(¶ms->action);
2822
2823 params->conn_min_interval = hdev->le_conn_min_interval;
2824 params->conn_max_interval = hdev->le_conn_max_interval;
2825 params->conn_latency = hdev->le_conn_latency;
2826 params->supervision_timeout = hdev->le_supv_timeout;
2827 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2828
2829 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2830
2831 return params;
2832}
2833
2834static void hci_conn_params_free(struct hci_conn_params *params)
2835{
2836 if (params->conn) {
2837 hci_conn_drop(params->conn);
2838 hci_conn_put(params->conn);
2839 }
2840
2841 list_del(¶ms->action);
2842 list_del(¶ms->list);
2843 kfree(params);
2844}
2845
2846/* This function requires the caller holds hdev->lock */
2847void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2848{
2849 struct hci_conn_params *params;
2850
2851 params = hci_conn_params_lookup(hdev, addr, addr_type);
2852 if (!params)
2853 return;
2854
2855 hci_conn_params_free(params);
2856
2857 hci_update_background_scan(hdev);
2858
2859 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2860}
2861
2862/* This function requires the caller holds hdev->lock */
2863void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2864{
2865 struct hci_conn_params *params, *tmp;
2866
2867 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2868 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2869 continue;
2870
2871 /* If trying to estabilish one time connection to disabled
2872 * device, leave the params, but mark them as just once.
2873 */
2874 if (params->explicit_connect) {
2875 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2876 continue;
2877 }
2878
2879 list_del(¶ms->list);
2880 kfree(params);
2881 }
2882
2883 BT_DBG("All LE disabled connection parameters were removed");
2884}
2885
2886/* This function requires the caller holds hdev->lock */
2887static void hci_conn_params_clear_all(struct hci_dev *hdev)
2888{
2889 struct hci_conn_params *params, *tmp;
2890
2891 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2892 hci_conn_params_free(params);
2893
2894 BT_DBG("All LE connection parameters were removed");
2895}
2896
2897/* Copy the Identity Address of the controller.
2898 *
2899 * If the controller has a public BD_ADDR, then by default use that one.
2900 * If this is a LE only controller without a public address, default to
2901 * the static random address.
2902 *
2903 * For debugging purposes it is possible to force controllers with a
2904 * public address to use the static random address instead.
2905 *
2906 * In case BR/EDR has been disabled on a dual-mode controller and
2907 * userspace has configured a static address, then that address
2908 * becomes the identity address instead of the public BR/EDR address.
2909 */
2910void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2911 u8 *bdaddr_type)
2912{
2913 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2914 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2915 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2916 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2917 bacpy(bdaddr, &hdev->static_addr);
2918 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2919 } else {
2920 bacpy(bdaddr, &hdev->bdaddr);
2921 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2922 }
2923}
2924
2925/* Alloc HCI device */
2926struct hci_dev *hci_alloc_dev(void)
2927{
2928 struct hci_dev *hdev;
2929
2930 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
2931 if (!hdev)
2932 return NULL;
2933
2934 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2935 hdev->esco_type = (ESCO_HV1);
2936 hdev->link_mode = (HCI_LM_ACCEPT);
2937 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2938 hdev->io_capability = 0x03; /* No Input No Output */
2939 hdev->manufacturer = 0xffff; /* Default to internal use */
2940 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2941 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2942 hdev->adv_instance_cnt = 0;
2943 hdev->cur_adv_instance = 0x00;
2944 hdev->adv_instance_timeout = 0;
2945
2946 hdev->sniff_max_interval = 800;
2947 hdev->sniff_min_interval = 80;
2948
2949 hdev->le_adv_channel_map = 0x07;
2950 hdev->le_adv_min_interval = 0x0800;
2951 hdev->le_adv_max_interval = 0x0800;
2952 hdev->le_scan_interval = 0x0060;
2953 hdev->le_scan_window = 0x0030;
2954 hdev->le_conn_min_interval = 0x0028;
2955 hdev->le_conn_max_interval = 0x0038;
2956 hdev->le_conn_latency = 0x0000;
2957 hdev->le_supv_timeout = 0x002a;
2958 hdev->le_def_tx_len = 0x001b;
2959 hdev->le_def_tx_time = 0x0148;
2960 hdev->le_max_tx_len = 0x001b;
2961 hdev->le_max_tx_time = 0x0148;
2962 hdev->le_max_rx_len = 0x001b;
2963 hdev->le_max_rx_time = 0x0148;
2964
2965 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2966 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2967 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2968 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2969
2970 mutex_init(&hdev->lock);
2971 mutex_init(&hdev->req_lock);
2972
2973 INIT_LIST_HEAD(&hdev->mgmt_pending);
2974 INIT_LIST_HEAD(&hdev->blacklist);
2975 INIT_LIST_HEAD(&hdev->whitelist);
2976 INIT_LIST_HEAD(&hdev->uuids);
2977 INIT_LIST_HEAD(&hdev->link_keys);
2978 INIT_LIST_HEAD(&hdev->long_term_keys);
2979 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2980 INIT_LIST_HEAD(&hdev->remote_oob_data);
2981 INIT_LIST_HEAD(&hdev->le_white_list);
2982 INIT_LIST_HEAD(&hdev->le_conn_params);
2983 INIT_LIST_HEAD(&hdev->pend_le_conns);
2984 INIT_LIST_HEAD(&hdev->pend_le_reports);
2985 INIT_LIST_HEAD(&hdev->conn_hash.list);
2986 INIT_LIST_HEAD(&hdev->adv_instances);
2987
2988 INIT_WORK(&hdev->rx_work, hci_rx_work);
2989 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2990 INIT_WORK(&hdev->tx_work, hci_tx_work);
2991 INIT_WORK(&hdev->power_on, hci_power_on);
2992 INIT_WORK(&hdev->error_reset, hci_error_reset);
2993
2994 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2995
2996 skb_queue_head_init(&hdev->rx_q);
2997 skb_queue_head_init(&hdev->cmd_q);
2998 skb_queue_head_init(&hdev->raw_q);
2999
3000 init_waitqueue_head(&hdev->req_wait_q);
3001
3002 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3003
3004 hci_request_setup(hdev);
3005
3006 hci_init_sysfs(hdev);
3007 discovery_init(hdev);
3008
3009 return hdev;
3010}
3011EXPORT_SYMBOL(hci_alloc_dev);
3012
3013/* Free HCI device */
3014void hci_free_dev(struct hci_dev *hdev)
3015{
3016 /* will free via device release */
3017 put_device(&hdev->dev);
3018}
3019EXPORT_SYMBOL(hci_free_dev);
3020
3021/* Register HCI device */
3022int hci_register_dev(struct hci_dev *hdev)
3023{
3024 int id, error;
3025
3026 if (!hdev->open || !hdev->close || !hdev->send)
3027 return -EINVAL;
3028
3029 /* Do not allow HCI_AMP devices to register at index 0,
3030 * so the index can be used as the AMP controller ID.
3031 */
3032 switch (hdev->dev_type) {
3033 case HCI_BREDR:
3034 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3035 break;
3036 case HCI_AMP:
3037 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3038 break;
3039 default:
3040 return -EINVAL;
3041 }
3042
3043 if (id < 0)
3044 return id;
3045
3046 sprintf(hdev->name, "hci%d", id);
3047 hdev->id = id;
3048
3049 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3050
3051 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3052 WQ_MEM_RECLAIM, 1, hdev->name);
3053 if (!hdev->workqueue) {
3054 error = -ENOMEM;
3055 goto err;
3056 }
3057
3058 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3059 WQ_MEM_RECLAIM, 1, hdev->name);
3060 if (!hdev->req_workqueue) {
3061 destroy_workqueue(hdev->workqueue);
3062 error = -ENOMEM;
3063 goto err;
3064 }
3065
3066 if (!IS_ERR_OR_NULL(bt_debugfs))
3067 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3068
3069 dev_set_name(&hdev->dev, "%s", hdev->name);
3070
3071 error = device_add(&hdev->dev);
3072 if (error < 0)
3073 goto err_wqueue;
3074
3075 hci_leds_init(hdev);
3076
3077 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3078 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3079 hdev);
3080 if (hdev->rfkill) {
3081 if (rfkill_register(hdev->rfkill) < 0) {
3082 rfkill_destroy(hdev->rfkill);
3083 hdev->rfkill = NULL;
3084 }
3085 }
3086
3087 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3088 hci_dev_set_flag(hdev, HCI_RFKILLED);
3089
3090 hci_dev_set_flag(hdev, HCI_SETUP);
3091 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3092
3093 if (hdev->dev_type == HCI_BREDR) {
3094 /* Assume BR/EDR support until proven otherwise (such as
3095 * through reading supported features during init.
3096 */
3097 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3098 }
3099
3100 write_lock(&hci_dev_list_lock);
3101 list_add(&hdev->list, &hci_dev_list);
3102 write_unlock(&hci_dev_list_lock);
3103
3104 /* Devices that are marked for raw-only usage are unconfigured
3105 * and should not be included in normal operation.
3106 */
3107 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3108 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3109
3110 hci_sock_dev_event(hdev, HCI_DEV_REG);
3111 hci_dev_hold(hdev);
3112
3113 queue_work(hdev->req_workqueue, &hdev->power_on);
3114
3115 return id;
3116
3117err_wqueue:
3118 destroy_workqueue(hdev->workqueue);
3119 destroy_workqueue(hdev->req_workqueue);
3120err:
3121 ida_simple_remove(&hci_index_ida, hdev->id);
3122
3123 return error;
3124}
3125EXPORT_SYMBOL(hci_register_dev);
3126
3127/* Unregister HCI device */
3128void hci_unregister_dev(struct hci_dev *hdev)
3129{
3130 int id;
3131
3132 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3133
3134 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3135
3136 id = hdev->id;
3137
3138 write_lock(&hci_dev_list_lock);
3139 list_del(&hdev->list);
3140 write_unlock(&hci_dev_list_lock);
3141
3142 hci_dev_do_close(hdev);
3143
3144 cancel_work_sync(&hdev->power_on);
3145
3146 if (!test_bit(HCI_INIT, &hdev->flags) &&
3147 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3148 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3149 hci_dev_lock(hdev);
3150 mgmt_index_removed(hdev);
3151 hci_dev_unlock(hdev);
3152 }
3153
3154 /* mgmt_index_removed should take care of emptying the
3155 * pending list */
3156 BUG_ON(!list_empty(&hdev->mgmt_pending));
3157
3158 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3159
3160 if (hdev->rfkill) {
3161 rfkill_unregister(hdev->rfkill);
3162 rfkill_destroy(hdev->rfkill);
3163 }
3164
3165 device_del(&hdev->dev);
3166
3167 debugfs_remove_recursive(hdev->debugfs);
3168
3169 destroy_workqueue(hdev->workqueue);
3170 destroy_workqueue(hdev->req_workqueue);
3171
3172 hci_dev_lock(hdev);
3173 hci_bdaddr_list_clear(&hdev->blacklist);
3174 hci_bdaddr_list_clear(&hdev->whitelist);
3175 hci_uuids_clear(hdev);
3176 hci_link_keys_clear(hdev);
3177 hci_smp_ltks_clear(hdev);
3178 hci_smp_irks_clear(hdev);
3179 hci_remote_oob_data_clear(hdev);
3180 hci_adv_instances_clear(hdev);
3181 hci_bdaddr_list_clear(&hdev->le_white_list);
3182 hci_conn_params_clear_all(hdev);
3183 hci_discovery_filter_clear(hdev);
3184 hci_dev_unlock(hdev);
3185
3186 hci_dev_put(hdev);
3187
3188 ida_simple_remove(&hci_index_ida, id);
3189}
3190EXPORT_SYMBOL(hci_unregister_dev);
3191
3192/* Suspend HCI device */
3193int hci_suspend_dev(struct hci_dev *hdev)
3194{
3195 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3196 return 0;
3197}
3198EXPORT_SYMBOL(hci_suspend_dev);
3199
3200/* Resume HCI device */
3201int hci_resume_dev(struct hci_dev *hdev)
3202{
3203 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3204 return 0;
3205}
3206EXPORT_SYMBOL(hci_resume_dev);
3207
3208/* Reset HCI device */
3209int hci_reset_dev(struct hci_dev *hdev)
3210{
3211 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3212 struct sk_buff *skb;
3213
3214 skb = bt_skb_alloc(3, GFP_ATOMIC);
3215 if (!skb)
3216 return -ENOMEM;
3217
3218 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3219 memcpy(skb_put(skb, 3), hw_err, 3);
3220
3221 /* Send Hardware Error to upper stack */
3222 return hci_recv_frame(hdev, skb);
3223}
3224EXPORT_SYMBOL(hci_reset_dev);
3225
3226/* Receive frame from HCI drivers */
3227int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3228{
3229 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3230 && !test_bit(HCI_INIT, &hdev->flags))) {
3231 kfree_skb(skb);
3232 return -ENXIO;
3233 }
3234
3235 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3236 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3237 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
3238 kfree_skb(skb);
3239 return -EINVAL;
3240 }
3241
3242 /* Incoming skb */
3243 bt_cb(skb)->incoming = 1;
3244
3245 /* Time stamp */
3246 __net_timestamp(skb);
3247
3248 skb_queue_tail(&hdev->rx_q, skb);
3249 queue_work(hdev->workqueue, &hdev->rx_work);
3250
3251 return 0;
3252}
3253EXPORT_SYMBOL(hci_recv_frame);
3254
3255/* Receive diagnostic message from HCI drivers */
3256int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3257{
3258 /* Mark as diagnostic packet */
3259 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3260
3261 /* Time stamp */
3262 __net_timestamp(skb);
3263
3264 skb_queue_tail(&hdev->rx_q, skb);
3265 queue_work(hdev->workqueue, &hdev->rx_work);
3266
3267 return 0;
3268}
3269EXPORT_SYMBOL(hci_recv_diag);
3270
3271/* ---- Interface to upper protocols ---- */
3272
3273int hci_register_cb(struct hci_cb *cb)
3274{
3275 BT_DBG("%p name %s", cb, cb->name);
3276
3277 mutex_lock(&hci_cb_list_lock);
3278 list_add_tail(&cb->list, &hci_cb_list);
3279 mutex_unlock(&hci_cb_list_lock);
3280
3281 return 0;
3282}
3283EXPORT_SYMBOL(hci_register_cb);
3284
3285int hci_unregister_cb(struct hci_cb *cb)
3286{
3287 BT_DBG("%p name %s", cb, cb->name);
3288
3289 mutex_lock(&hci_cb_list_lock);
3290 list_del(&cb->list);
3291 mutex_unlock(&hci_cb_list_lock);
3292
3293 return 0;
3294}
3295EXPORT_SYMBOL(hci_unregister_cb);
3296
3297static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3298{
3299 int err;
3300
3301 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3302 skb->len);
3303
3304 /* Time stamp */
3305 __net_timestamp(skb);
3306
3307 /* Send copy to monitor */
3308 hci_send_to_monitor(hdev, skb);
3309
3310 if (atomic_read(&hdev->promisc)) {
3311 /* Send copy to the sockets */
3312 hci_send_to_sock(hdev, skb);
3313 }
3314
3315 /* Get rid of skb owner, prior to sending to the driver. */
3316 skb_orphan(skb);
3317
3318 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3319 kfree_skb(skb);
3320 return;
3321 }
3322
3323 err = hdev->send(hdev, skb);
3324 if (err < 0) {
3325 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3326 kfree_skb(skb);
3327 }
3328}
3329
3330/* Send HCI command */
3331int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3332 const void *param)
3333{
3334 struct sk_buff *skb;
3335
3336 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3337
3338 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3339 if (!skb) {
3340 BT_ERR("%s no memory for command", hdev->name);
3341 return -ENOMEM;
3342 }
3343
3344 /* Stand-alone HCI commands must be flagged as
3345 * single-command requests.
3346 */
3347 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3348
3349 skb_queue_tail(&hdev->cmd_q, skb);
3350 queue_work(hdev->workqueue, &hdev->cmd_work);
3351
3352 return 0;
3353}
3354
3355/* Get data from the previously sent command */
3356void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3357{
3358 struct hci_command_hdr *hdr;
3359
3360 if (!hdev->sent_cmd)
3361 return NULL;
3362
3363 hdr = (void *) hdev->sent_cmd->data;
3364
3365 if (hdr->opcode != cpu_to_le16(opcode))
3366 return NULL;
3367
3368 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3369
3370 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3371}
3372
3373/* Send HCI command and wait for command commplete event */
3374struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3375 const void *param, u32 timeout)
3376{
3377 struct sk_buff *skb;
3378
3379 if (!test_bit(HCI_UP, &hdev->flags))
3380 return ERR_PTR(-ENETDOWN);
3381
3382 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3383
3384 hci_req_sync_lock(hdev);
3385 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3386 hci_req_sync_unlock(hdev);
3387
3388 return skb;
3389}
3390EXPORT_SYMBOL(hci_cmd_sync);
3391
3392/* Send ACL data */
3393static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3394{
3395 struct hci_acl_hdr *hdr;
3396 int len = skb->len;
3397
3398 skb_push(skb, HCI_ACL_HDR_SIZE);
3399 skb_reset_transport_header(skb);
3400 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3401 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3402 hdr->dlen = cpu_to_le16(len);
3403}
3404
3405static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3406 struct sk_buff *skb, __u16 flags)
3407{
3408 struct hci_conn *conn = chan->conn;
3409 struct hci_dev *hdev = conn->hdev;
3410 struct sk_buff *list;
3411
3412 skb->len = skb_headlen(skb);
3413 skb->data_len = 0;
3414
3415 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3416
3417 switch (hdev->dev_type) {
3418 case HCI_BREDR:
3419 hci_add_acl_hdr(skb, conn->handle, flags);
3420 break;
3421 case HCI_AMP:
3422 hci_add_acl_hdr(skb, chan->handle, flags);
3423 break;
3424 default:
3425 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3426 return;
3427 }
3428
3429 list = skb_shinfo(skb)->frag_list;
3430 if (!list) {
3431 /* Non fragmented */
3432 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3433
3434 skb_queue_tail(queue, skb);
3435 } else {
3436 /* Fragmented */
3437 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3438
3439 skb_shinfo(skb)->frag_list = NULL;
3440
3441 /* Queue all fragments atomically. We need to use spin_lock_bh
3442 * here because of 6LoWPAN links, as there this function is
3443 * called from softirq and using normal spin lock could cause
3444 * deadlocks.
3445 */
3446 spin_lock_bh(&queue->lock);
3447
3448 __skb_queue_tail(queue, skb);
3449
3450 flags &= ~ACL_START;
3451 flags |= ACL_CONT;
3452 do {
3453 skb = list; list = list->next;
3454
3455 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3456 hci_add_acl_hdr(skb, conn->handle, flags);
3457
3458 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3459
3460 __skb_queue_tail(queue, skb);
3461 } while (list);
3462
3463 spin_unlock_bh(&queue->lock);
3464 }
3465}
3466
3467void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3468{
3469 struct hci_dev *hdev = chan->conn->hdev;
3470
3471 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3472
3473 hci_queue_acl(chan, &chan->data_q, skb, flags);
3474
3475 queue_work(hdev->workqueue, &hdev->tx_work);
3476}
3477
3478/* Send SCO data */
3479void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3480{
3481 struct hci_dev *hdev = conn->hdev;
3482 struct hci_sco_hdr hdr;
3483
3484 BT_DBG("%s len %d", hdev->name, skb->len);
3485
3486 hdr.handle = cpu_to_le16(conn->handle);
3487 hdr.dlen = skb->len;
3488
3489 skb_push(skb, HCI_SCO_HDR_SIZE);
3490 skb_reset_transport_header(skb);
3491 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3492
3493 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3494
3495 skb_queue_tail(&conn->data_q, skb);
3496 queue_work(hdev->workqueue, &hdev->tx_work);
3497}
3498
3499/* ---- HCI TX task (outgoing data) ---- */
3500
3501/* HCI Connection scheduler */
3502static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3503 int *quote)
3504{
3505 struct hci_conn_hash *h = &hdev->conn_hash;
3506 struct hci_conn *conn = NULL, *c;
3507 unsigned int num = 0, min = ~0;
3508
3509 /* We don't have to lock device here. Connections are always
3510 * added and removed with TX task disabled. */
3511
3512 rcu_read_lock();
3513
3514 list_for_each_entry_rcu(c, &h->list, list) {
3515 if (c->type != type || skb_queue_empty(&c->data_q))
3516 continue;
3517
3518 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3519 continue;
3520
3521 num++;
3522
3523 if (c->sent < min) {
3524 min = c->sent;
3525 conn = c;
3526 }
3527
3528 if (hci_conn_num(hdev, type) == num)
3529 break;
3530 }
3531
3532 rcu_read_unlock();
3533
3534 if (conn) {
3535 int cnt, q;
3536
3537 switch (conn->type) {
3538 case ACL_LINK:
3539 cnt = hdev->acl_cnt;
3540 break;
3541 case SCO_LINK:
3542 case ESCO_LINK:
3543 cnt = hdev->sco_cnt;
3544 break;
3545 case LE_LINK:
3546 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3547 break;
3548 default:
3549 cnt = 0;
3550 BT_ERR("Unknown link type");
3551 }
3552
3553 q = cnt / num;
3554 *quote = q ? q : 1;
3555 } else
3556 *quote = 0;
3557
3558 BT_DBG("conn %p quote %d", conn, *quote);
3559 return conn;
3560}
3561
3562static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3563{
3564 struct hci_conn_hash *h = &hdev->conn_hash;
3565 struct hci_conn *c;
3566
3567 BT_ERR("%s link tx timeout", hdev->name);
3568
3569 rcu_read_lock();
3570
3571 /* Kill stalled connections */
3572 list_for_each_entry_rcu(c, &h->list, list) {
3573 if (c->type == type && c->sent) {
3574 BT_ERR("%s killing stalled connection %pMR",
3575 hdev->name, &c->dst);
3576 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3577 }
3578 }
3579
3580 rcu_read_unlock();
3581}
3582
3583static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3584 int *quote)
3585{
3586 struct hci_conn_hash *h = &hdev->conn_hash;
3587 struct hci_chan *chan = NULL;
3588 unsigned int num = 0, min = ~0, cur_prio = 0;
3589 struct hci_conn *conn;
3590 int cnt, q, conn_num = 0;
3591
3592 BT_DBG("%s", hdev->name);
3593
3594 rcu_read_lock();
3595
3596 list_for_each_entry_rcu(conn, &h->list, list) {
3597 struct hci_chan *tmp;
3598
3599 if (conn->type != type)
3600 continue;
3601
3602 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3603 continue;
3604
3605 conn_num++;
3606
3607 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3608 struct sk_buff *skb;
3609
3610 if (skb_queue_empty(&tmp->data_q))
3611 continue;
3612
3613 skb = skb_peek(&tmp->data_q);
3614 if (skb->priority < cur_prio)
3615 continue;
3616
3617 if (skb->priority > cur_prio) {
3618 num = 0;
3619 min = ~0;
3620 cur_prio = skb->priority;
3621 }
3622
3623 num++;
3624
3625 if (conn->sent < min) {
3626 min = conn->sent;
3627 chan = tmp;
3628 }
3629 }
3630
3631 if (hci_conn_num(hdev, type) == conn_num)
3632 break;
3633 }
3634
3635 rcu_read_unlock();
3636
3637 if (!chan)
3638 return NULL;
3639
3640 switch (chan->conn->type) {
3641 case ACL_LINK:
3642 cnt = hdev->acl_cnt;
3643 break;
3644 case AMP_LINK:
3645 cnt = hdev->block_cnt;
3646 break;
3647 case SCO_LINK:
3648 case ESCO_LINK:
3649 cnt = hdev->sco_cnt;
3650 break;
3651 case LE_LINK:
3652 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3653 break;
3654 default:
3655 cnt = 0;
3656 BT_ERR("Unknown link type");
3657 }
3658
3659 q = cnt / num;
3660 *quote = q ? q : 1;
3661 BT_DBG("chan %p quote %d", chan, *quote);
3662 return chan;
3663}
3664
3665static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3666{
3667 struct hci_conn_hash *h = &hdev->conn_hash;
3668 struct hci_conn *conn;
3669 int num = 0;
3670
3671 BT_DBG("%s", hdev->name);
3672
3673 rcu_read_lock();
3674
3675 list_for_each_entry_rcu(conn, &h->list, list) {
3676 struct hci_chan *chan;
3677
3678 if (conn->type != type)
3679 continue;
3680
3681 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3682 continue;
3683
3684 num++;
3685
3686 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3687 struct sk_buff *skb;
3688
3689 if (chan->sent) {
3690 chan->sent = 0;
3691 continue;
3692 }
3693
3694 if (skb_queue_empty(&chan->data_q))
3695 continue;
3696
3697 skb = skb_peek(&chan->data_q);
3698 if (skb->priority >= HCI_PRIO_MAX - 1)
3699 continue;
3700
3701 skb->priority = HCI_PRIO_MAX - 1;
3702
3703 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3704 skb->priority);
3705 }
3706
3707 if (hci_conn_num(hdev, type) == num)
3708 break;
3709 }
3710
3711 rcu_read_unlock();
3712
3713}
3714
3715static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3716{
3717 /* Calculate count of blocks used by this packet */
3718 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3719}
3720
3721static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3722{
3723 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3724 /* ACL tx timeout must be longer than maximum
3725 * link supervision timeout (40.9 seconds) */
3726 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3727 HCI_ACL_TX_TIMEOUT))
3728 hci_link_tx_to(hdev, ACL_LINK);
3729 }
3730}
3731
3732static void hci_sched_acl_pkt(struct hci_dev *hdev)
3733{
3734 unsigned int cnt = hdev->acl_cnt;
3735 struct hci_chan *chan;
3736 struct sk_buff *skb;
3737 int quote;
3738
3739 __check_timeout(hdev, cnt);
3740
3741 while (hdev->acl_cnt &&
3742 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3743 u32 priority = (skb_peek(&chan->data_q))->priority;
3744 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3745 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3746 skb->len, skb->priority);
3747
3748 /* Stop if priority has changed */
3749 if (skb->priority < priority)
3750 break;
3751
3752 skb = skb_dequeue(&chan->data_q);
3753
3754 hci_conn_enter_active_mode(chan->conn,
3755 bt_cb(skb)->force_active);
3756
3757 hci_send_frame(hdev, skb);
3758 hdev->acl_last_tx = jiffies;
3759
3760 hdev->acl_cnt--;
3761 chan->sent++;
3762 chan->conn->sent++;
3763 }
3764 }
3765
3766 if (cnt != hdev->acl_cnt)
3767 hci_prio_recalculate(hdev, ACL_LINK);
3768}
3769
3770static void hci_sched_acl_blk(struct hci_dev *hdev)
3771{
3772 unsigned int cnt = hdev->block_cnt;
3773 struct hci_chan *chan;
3774 struct sk_buff *skb;
3775 int quote;
3776 u8 type;
3777
3778 __check_timeout(hdev, cnt);
3779
3780 BT_DBG("%s", hdev->name);
3781
3782 if (hdev->dev_type == HCI_AMP)
3783 type = AMP_LINK;
3784 else
3785 type = ACL_LINK;
3786
3787 while (hdev->block_cnt > 0 &&
3788 (chan = hci_chan_sent(hdev, type, "e))) {
3789 u32 priority = (skb_peek(&chan->data_q))->priority;
3790 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3791 int blocks;
3792
3793 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3794 skb->len, skb->priority);
3795
3796 /* Stop if priority has changed */
3797 if (skb->priority < priority)
3798 break;
3799
3800 skb = skb_dequeue(&chan->data_q);
3801
3802 blocks = __get_blocks(hdev, skb);
3803 if (blocks > hdev->block_cnt)
3804 return;
3805
3806 hci_conn_enter_active_mode(chan->conn,
3807 bt_cb(skb)->force_active);
3808
3809 hci_send_frame(hdev, skb);
3810 hdev->acl_last_tx = jiffies;
3811
3812 hdev->block_cnt -= blocks;
3813 quote -= blocks;
3814
3815 chan->sent += blocks;
3816 chan->conn->sent += blocks;
3817 }
3818 }
3819
3820 if (cnt != hdev->block_cnt)
3821 hci_prio_recalculate(hdev, type);
3822}
3823
3824static void hci_sched_acl(struct hci_dev *hdev)
3825{
3826 BT_DBG("%s", hdev->name);
3827
3828 /* No ACL link over BR/EDR controller */
3829 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3830 return;
3831
3832 /* No AMP link over AMP controller */
3833 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3834 return;
3835
3836 switch (hdev->flow_ctl_mode) {
3837 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3838 hci_sched_acl_pkt(hdev);
3839 break;
3840
3841 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3842 hci_sched_acl_blk(hdev);
3843 break;
3844 }
3845}
3846
3847/* Schedule SCO */
3848static void hci_sched_sco(struct hci_dev *hdev)
3849{
3850 struct hci_conn *conn;
3851 struct sk_buff *skb;
3852 int quote;
3853
3854 BT_DBG("%s", hdev->name);
3855
3856 if (!hci_conn_num(hdev, SCO_LINK))
3857 return;
3858
3859 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3860 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3861 BT_DBG("skb %p len %d", skb, skb->len);
3862 hci_send_frame(hdev, skb);
3863
3864 conn->sent++;
3865 if (conn->sent == ~0)
3866 conn->sent = 0;
3867 }
3868 }
3869}
3870
3871static void hci_sched_esco(struct hci_dev *hdev)
3872{
3873 struct hci_conn *conn;
3874 struct sk_buff *skb;
3875 int quote;
3876
3877 BT_DBG("%s", hdev->name);
3878
3879 if (!hci_conn_num(hdev, ESCO_LINK))
3880 return;
3881
3882 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3883 "e))) {
3884 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3885 BT_DBG("skb %p len %d", skb, skb->len);
3886 hci_send_frame(hdev, skb);
3887
3888 conn->sent++;
3889 if (conn->sent == ~0)
3890 conn->sent = 0;
3891 }
3892 }
3893}
3894
3895static void hci_sched_le(struct hci_dev *hdev)
3896{
3897 struct hci_chan *chan;
3898 struct sk_buff *skb;
3899 int quote, cnt, tmp;
3900
3901 BT_DBG("%s", hdev->name);
3902
3903 if (!hci_conn_num(hdev, LE_LINK))
3904 return;
3905
3906 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3907 /* LE tx timeout must be longer than maximum
3908 * link supervision timeout (40.9 seconds) */
3909 if (!hdev->le_cnt && hdev->le_pkts &&
3910 time_after(jiffies, hdev->le_last_tx + HZ * 45))
3911 hci_link_tx_to(hdev, LE_LINK);
3912 }
3913
3914 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3915 tmp = cnt;
3916 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3917 u32 priority = (skb_peek(&chan->data_q))->priority;
3918 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3919 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3920 skb->len, skb->priority);
3921
3922 /* Stop if priority has changed */
3923 if (skb->priority < priority)
3924 break;
3925
3926 skb = skb_dequeue(&chan->data_q);
3927
3928 hci_send_frame(hdev, skb);
3929 hdev->le_last_tx = jiffies;
3930
3931 cnt--;
3932 chan->sent++;
3933 chan->conn->sent++;
3934 }
3935 }
3936
3937 if (hdev->le_pkts)
3938 hdev->le_cnt = cnt;
3939 else
3940 hdev->acl_cnt = cnt;
3941
3942 if (cnt != tmp)
3943 hci_prio_recalculate(hdev, LE_LINK);
3944}
3945
3946static void hci_tx_work(struct work_struct *work)
3947{
3948 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3949 struct sk_buff *skb;
3950
3951 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
3952 hdev->sco_cnt, hdev->le_cnt);
3953
3954 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3955 /* Schedule queues and send stuff to HCI driver */
3956 hci_sched_acl(hdev);
3957 hci_sched_sco(hdev);
3958 hci_sched_esco(hdev);
3959 hci_sched_le(hdev);
3960 }
3961
3962 /* Send next queued raw (unknown type) packet */
3963 while ((skb = skb_dequeue(&hdev->raw_q)))
3964 hci_send_frame(hdev, skb);
3965}
3966
3967/* ----- HCI RX task (incoming data processing) ----- */
3968
3969/* ACL data packet */
3970static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3971{
3972 struct hci_acl_hdr *hdr = (void *) skb->data;
3973 struct hci_conn *conn;
3974 __u16 handle, flags;
3975
3976 skb_pull(skb, HCI_ACL_HDR_SIZE);
3977
3978 handle = __le16_to_cpu(hdr->handle);
3979 flags = hci_flags(handle);
3980 handle = hci_handle(handle);
3981
3982 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3983 handle, flags);
3984
3985 hdev->stat.acl_rx++;
3986
3987 hci_dev_lock(hdev);
3988 conn = hci_conn_hash_lookup_handle(hdev, handle);
3989 hci_dev_unlock(hdev);
3990
3991 if (conn) {
3992 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3993
3994 /* Send to upper protocol */
3995 l2cap_recv_acldata(conn, skb, flags);
3996 return;
3997 } else {
3998 BT_ERR("%s ACL packet for unknown connection handle %d",
3999 hdev->name, handle);
4000 }
4001
4002 kfree_skb(skb);
4003}
4004
4005/* SCO data packet */
4006static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4007{
4008 struct hci_sco_hdr *hdr = (void *) skb->data;
4009 struct hci_conn *conn;
4010 __u16 handle;
4011
4012 skb_pull(skb, HCI_SCO_HDR_SIZE);
4013
4014 handle = __le16_to_cpu(hdr->handle);
4015
4016 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4017
4018 hdev->stat.sco_rx++;
4019
4020 hci_dev_lock(hdev);
4021 conn = hci_conn_hash_lookup_handle(hdev, handle);
4022 hci_dev_unlock(hdev);
4023
4024 if (conn) {
4025 /* Send to upper protocol */
4026 sco_recv_scodata(conn, skb);
4027 return;
4028 } else {
4029 BT_ERR("%s SCO packet for unknown connection handle %d",
4030 hdev->name, handle);
4031 }
4032
4033 kfree_skb(skb);
4034}
4035
4036static bool hci_req_is_complete(struct hci_dev *hdev)
4037{
4038 struct sk_buff *skb;
4039
4040 skb = skb_peek(&hdev->cmd_q);
4041 if (!skb)
4042 return true;
4043
4044 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4045}
4046
4047static void hci_resend_last(struct hci_dev *hdev)
4048{
4049 struct hci_command_hdr *sent;
4050 struct sk_buff *skb;
4051 u16 opcode;
4052
4053 if (!hdev->sent_cmd)
4054 return;
4055
4056 sent = (void *) hdev->sent_cmd->data;
4057 opcode = __le16_to_cpu(sent->opcode);
4058 if (opcode == HCI_OP_RESET)
4059 return;
4060
4061 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4062 if (!skb)
4063 return;
4064
4065 skb_queue_head(&hdev->cmd_q, skb);
4066 queue_work(hdev->workqueue, &hdev->cmd_work);
4067}
4068
4069void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4070 hci_req_complete_t *req_complete,
4071 hci_req_complete_skb_t *req_complete_skb)
4072{
4073 struct sk_buff *skb;
4074 unsigned long flags;
4075
4076 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4077
4078 /* If the completed command doesn't match the last one that was
4079 * sent we need to do special handling of it.
4080 */
4081 if (!hci_sent_cmd_data(hdev, opcode)) {
4082 /* Some CSR based controllers generate a spontaneous
4083 * reset complete event during init and any pending
4084 * command will never be completed. In such a case we
4085 * need to resend whatever was the last sent
4086 * command.
4087 */
4088 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4089 hci_resend_last(hdev);
4090
4091 return;
4092 }
4093
4094 /* If the command succeeded and there's still more commands in
4095 * this request the request is not yet complete.
4096 */
4097 if (!status && !hci_req_is_complete(hdev))
4098 return;
4099
4100 /* If this was the last command in a request the complete
4101 * callback would be found in hdev->sent_cmd instead of the
4102 * command queue (hdev->cmd_q).
4103 */
4104 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4105 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4106 return;
4107 }
4108
4109 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4110 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4111 return;
4112 }
4113
4114 /* Remove all pending commands belonging to this request */
4115 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4116 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4117 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4118 __skb_queue_head(&hdev->cmd_q, skb);
4119 break;
4120 }
4121
4122 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4123 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4124 else
4125 *req_complete = bt_cb(skb)->hci.req_complete;
4126 kfree_skb(skb);
4127 }
4128 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4129}
4130
4131static void hci_rx_work(struct work_struct *work)
4132{
4133 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4134 struct sk_buff *skb;
4135
4136 BT_DBG("%s", hdev->name);
4137
4138 while ((skb = skb_dequeue(&hdev->rx_q))) {
4139 /* Send copy to monitor */
4140 hci_send_to_monitor(hdev, skb);
4141
4142 if (atomic_read(&hdev->promisc)) {
4143 /* Send copy to the sockets */
4144 hci_send_to_sock(hdev, skb);
4145 }
4146
4147 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4148 kfree_skb(skb);
4149 continue;
4150 }
4151
4152 if (test_bit(HCI_INIT, &hdev->flags)) {
4153 /* Don't process data packets in this states. */
4154 switch (hci_skb_pkt_type(skb)) {
4155 case HCI_ACLDATA_PKT:
4156 case HCI_SCODATA_PKT:
4157 kfree_skb(skb);
4158 continue;
4159 }
4160 }
4161
4162 /* Process frame */
4163 switch (hci_skb_pkt_type(skb)) {
4164 case HCI_EVENT_PKT:
4165 BT_DBG("%s Event packet", hdev->name);
4166 hci_event_packet(hdev, skb);
4167 break;
4168
4169 case HCI_ACLDATA_PKT:
4170 BT_DBG("%s ACL data packet", hdev->name);
4171 hci_acldata_packet(hdev, skb);
4172 break;
4173
4174 case HCI_SCODATA_PKT:
4175 BT_DBG("%s SCO data packet", hdev->name);
4176 hci_scodata_packet(hdev, skb);
4177 break;
4178
4179 default:
4180 kfree_skb(skb);
4181 break;
4182 }
4183 }
4184}
4185
4186static void hci_cmd_work(struct work_struct *work)
4187{
4188 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4189 struct sk_buff *skb;
4190
4191 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4192 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4193
4194 /* Send queued commands */
4195 if (atomic_read(&hdev->cmd_cnt)) {
4196 skb = skb_dequeue(&hdev->cmd_q);
4197 if (!skb)
4198 return;
4199
4200 kfree_skb(hdev->sent_cmd);
4201
4202 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4203 if (hdev->sent_cmd) {
4204 atomic_dec(&hdev->cmd_cnt);
4205 hci_send_frame(hdev, skb);
4206 if (test_bit(HCI_RESET, &hdev->flags))
4207 cancel_delayed_work(&hdev->cmd_timer);
4208 else
4209 schedule_delayed_work(&hdev->cmd_timer,
4210 HCI_CMD_TIMEOUT);
4211 } else {
4212 skb_queue_head(&hdev->cmd_q, skb);
4213 queue_work(hdev->workqueue, &hdev->cmd_work);
4214 }
4215 }
4216}
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#include "leds.h"
44
45static void hci_rx_work(struct work_struct *work);
46static void hci_cmd_work(struct work_struct *work);
47static void hci_tx_work(struct work_struct *work);
48
49/* HCI device list */
50LIST_HEAD(hci_dev_list);
51DEFINE_RWLOCK(hci_dev_list_lock);
52
53/* HCI callback list */
54LIST_HEAD(hci_cb_list);
55DEFINE_MUTEX(hci_cb_list_lock);
56
57/* HCI ID Numbering */
58static DEFINE_IDA(hci_index_ida);
59
60/* ---- HCI debugfs entries ---- */
61
62static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
63 size_t count, loff_t *ppos)
64{
65 struct hci_dev *hdev = file->private_data;
66 char buf[3];
67
68 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
69 buf[1] = '\n';
70 buf[2] = '\0';
71 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
72}
73
74static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
75 size_t count, loff_t *ppos)
76{
77 struct hci_dev *hdev = file->private_data;
78 struct sk_buff *skb;
79 char buf[32];
80 size_t buf_size = min(count, (sizeof(buf)-1));
81 bool enable;
82
83 if (!test_bit(HCI_UP, &hdev->flags))
84 return -ENETDOWN;
85
86 if (copy_from_user(buf, user_buf, buf_size))
87 return -EFAULT;
88
89 buf[buf_size] = '\0';
90 if (strtobool(buf, &enable))
91 return -EINVAL;
92
93 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
94 return -EALREADY;
95
96 hci_req_sync_lock(hdev);
97 if (enable)
98 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
99 HCI_CMD_TIMEOUT);
100 else
101 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
102 HCI_CMD_TIMEOUT);
103 hci_req_sync_unlock(hdev);
104
105 if (IS_ERR(skb))
106 return PTR_ERR(skb);
107
108 kfree_skb(skb);
109
110 hci_dev_change_flag(hdev, HCI_DUT_MODE);
111
112 return count;
113}
114
115static const struct file_operations dut_mode_fops = {
116 .open = simple_open,
117 .read = dut_mode_read,
118 .write = dut_mode_write,
119 .llseek = default_llseek,
120};
121
122static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
123 size_t count, loff_t *ppos)
124{
125 struct hci_dev *hdev = file->private_data;
126 char buf[3];
127
128 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
129 buf[1] = '\n';
130 buf[2] = '\0';
131 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
132}
133
134static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
135 size_t count, loff_t *ppos)
136{
137 struct hci_dev *hdev = file->private_data;
138 char buf[32];
139 size_t buf_size = min(count, (sizeof(buf)-1));
140 bool enable;
141 int err;
142
143 if (copy_from_user(buf, user_buf, buf_size))
144 return -EFAULT;
145
146 buf[buf_size] = '\0';
147 if (strtobool(buf, &enable))
148 return -EINVAL;
149
150 /* When the diagnostic flags are not persistent and the transport
151 * is not active or in user channel operation, then there is no need
152 * for the vendor callback. Instead just store the desired value and
153 * the setting will be programmed when the controller gets powered on.
154 */
155 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
156 (!test_bit(HCI_RUNNING, &hdev->flags) ||
157 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
158 goto done;
159
160 hci_req_sync_lock(hdev);
161 err = hdev->set_diag(hdev, enable);
162 hci_req_sync_unlock(hdev);
163
164 if (err < 0)
165 return err;
166
167done:
168 if (enable)
169 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
170 else
171 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
172
173 return count;
174}
175
176static const struct file_operations vendor_diag_fops = {
177 .open = simple_open,
178 .read = vendor_diag_read,
179 .write = vendor_diag_write,
180 .llseek = default_llseek,
181};
182
183static void hci_debugfs_create_basic(struct hci_dev *hdev)
184{
185 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
186 &dut_mode_fops);
187
188 if (hdev->set_diag)
189 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
190 &vendor_diag_fops);
191}
192
193static int hci_reset_req(struct hci_request *req, unsigned long opt)
194{
195 BT_DBG("%s %ld", req->hdev->name, opt);
196
197 /* Reset device */
198 set_bit(HCI_RESET, &req->hdev->flags);
199 hci_req_add(req, HCI_OP_RESET, 0, NULL);
200 return 0;
201}
202
203static void bredr_init(struct hci_request *req)
204{
205 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
206
207 /* Read Local Supported Features */
208 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
209
210 /* Read Local Version */
211 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
212
213 /* Read BD Address */
214 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
215}
216
217static void amp_init1(struct hci_request *req)
218{
219 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
220
221 /* Read Local Version */
222 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
223
224 /* Read Local Supported Commands */
225 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
226
227 /* Read Local AMP Info */
228 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
229
230 /* Read Data Blk size */
231 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
232
233 /* Read Flow Control Mode */
234 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
235
236 /* Read Location Data */
237 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
238}
239
240static int amp_init2(struct hci_request *req)
241{
242 /* Read Local Supported Features. Not all AMP controllers
243 * support this so it's placed conditionally in the second
244 * stage init.
245 */
246 if (req->hdev->commands[14] & 0x20)
247 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
248
249 return 0;
250}
251
252static int hci_init1_req(struct hci_request *req, unsigned long opt)
253{
254 struct hci_dev *hdev = req->hdev;
255
256 BT_DBG("%s %ld", hdev->name, opt);
257
258 /* Reset */
259 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
260 hci_reset_req(req, 0);
261
262 switch (hdev->dev_type) {
263 case HCI_PRIMARY:
264 bredr_init(req);
265 break;
266 case HCI_AMP:
267 amp_init1(req);
268 break;
269 default:
270 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
271 break;
272 }
273
274 return 0;
275}
276
277static void bredr_setup(struct hci_request *req)
278{
279 __le16 param;
280 __u8 flt_type;
281
282 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
283 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
284
285 /* Read Class of Device */
286 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
287
288 /* Read Local Name */
289 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
290
291 /* Read Voice Setting */
292 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
293
294 /* Read Number of Supported IAC */
295 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
296
297 /* Read Current IAC LAP */
298 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
299
300 /* Clear Event Filters */
301 flt_type = HCI_FLT_CLEAR_ALL;
302 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
303
304 /* Connection accept timeout ~20 secs */
305 param = cpu_to_le16(0x7d00);
306 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
307}
308
309static void le_setup(struct hci_request *req)
310{
311 struct hci_dev *hdev = req->hdev;
312
313 /* Read LE Buffer Size */
314 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
315
316 /* Read LE Local Supported Features */
317 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
318
319 /* Read LE Supported States */
320 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
321
322 /* LE-only controllers have LE implicitly enabled */
323 if (!lmp_bredr_capable(hdev))
324 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
325}
326
327static void hci_setup_event_mask(struct hci_request *req)
328{
329 struct hci_dev *hdev = req->hdev;
330
331 /* The second byte is 0xff instead of 0x9f (two reserved bits
332 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
333 * command otherwise.
334 */
335 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
336
337 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
338 * any event mask for pre 1.2 devices.
339 */
340 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
341 return;
342
343 if (lmp_bredr_capable(hdev)) {
344 events[4] |= 0x01; /* Flow Specification Complete */
345 } else {
346 /* Use a different default for LE-only devices */
347 memset(events, 0, sizeof(events));
348 events[1] |= 0x20; /* Command Complete */
349 events[1] |= 0x40; /* Command Status */
350 events[1] |= 0x80; /* Hardware Error */
351
352 /* If the controller supports the Disconnect command, enable
353 * the corresponding event. In addition enable packet flow
354 * control related events.
355 */
356 if (hdev->commands[0] & 0x20) {
357 events[0] |= 0x10; /* Disconnection Complete */
358 events[2] |= 0x04; /* Number of Completed Packets */
359 events[3] |= 0x02; /* Data Buffer Overflow */
360 }
361
362 /* If the controller supports the Read Remote Version
363 * Information command, enable the corresponding event.
364 */
365 if (hdev->commands[2] & 0x80)
366 events[1] |= 0x08; /* Read Remote Version Information
367 * Complete
368 */
369
370 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
371 events[0] |= 0x80; /* Encryption Change */
372 events[5] |= 0x80; /* Encryption Key Refresh Complete */
373 }
374 }
375
376 if (lmp_inq_rssi_capable(hdev) ||
377 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
378 events[4] |= 0x02; /* Inquiry Result with RSSI */
379
380 if (lmp_ext_feat_capable(hdev))
381 events[4] |= 0x04; /* Read Remote Extended Features Complete */
382
383 if (lmp_esco_capable(hdev)) {
384 events[5] |= 0x08; /* Synchronous Connection Complete */
385 events[5] |= 0x10; /* Synchronous Connection Changed */
386 }
387
388 if (lmp_sniffsubr_capable(hdev))
389 events[5] |= 0x20; /* Sniff Subrating */
390
391 if (lmp_pause_enc_capable(hdev))
392 events[5] |= 0x80; /* Encryption Key Refresh Complete */
393
394 if (lmp_ext_inq_capable(hdev))
395 events[5] |= 0x40; /* Extended Inquiry Result */
396
397 if (lmp_no_flush_capable(hdev))
398 events[7] |= 0x01; /* Enhanced Flush Complete */
399
400 if (lmp_lsto_capable(hdev))
401 events[6] |= 0x80; /* Link Supervision Timeout Changed */
402
403 if (lmp_ssp_capable(hdev)) {
404 events[6] |= 0x01; /* IO Capability Request */
405 events[6] |= 0x02; /* IO Capability Response */
406 events[6] |= 0x04; /* User Confirmation Request */
407 events[6] |= 0x08; /* User Passkey Request */
408 events[6] |= 0x10; /* Remote OOB Data Request */
409 events[6] |= 0x20; /* Simple Pairing Complete */
410 events[7] |= 0x04; /* User Passkey Notification */
411 events[7] |= 0x08; /* Keypress Notification */
412 events[7] |= 0x10; /* Remote Host Supported
413 * Features Notification
414 */
415 }
416
417 if (lmp_le_capable(hdev))
418 events[7] |= 0x20; /* LE Meta-Event */
419
420 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
421}
422
423static int hci_init2_req(struct hci_request *req, unsigned long opt)
424{
425 struct hci_dev *hdev = req->hdev;
426
427 if (hdev->dev_type == HCI_AMP)
428 return amp_init2(req);
429
430 if (lmp_bredr_capable(hdev))
431 bredr_setup(req);
432 else
433 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
434
435 if (lmp_le_capable(hdev))
436 le_setup(req);
437
438 /* All Bluetooth 1.2 and later controllers should support the
439 * HCI command for reading the local supported commands.
440 *
441 * Unfortunately some controllers indicate Bluetooth 1.2 support,
442 * but do not have support for this command. If that is the case,
443 * the driver can quirk the behavior and skip reading the local
444 * supported commands.
445 */
446 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
447 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
448 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
449
450 if (lmp_ssp_capable(hdev)) {
451 /* When SSP is available, then the host features page
452 * should also be available as well. However some
453 * controllers list the max_page as 0 as long as SSP
454 * has not been enabled. To achieve proper debugging
455 * output, force the minimum max_page to 1 at least.
456 */
457 hdev->max_page = 0x01;
458
459 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
460 u8 mode = 0x01;
461
462 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
463 sizeof(mode), &mode);
464 } else {
465 struct hci_cp_write_eir cp;
466
467 memset(hdev->eir, 0, sizeof(hdev->eir));
468 memset(&cp, 0, sizeof(cp));
469
470 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
471 }
472 }
473
474 if (lmp_inq_rssi_capable(hdev) ||
475 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
476 u8 mode;
477
478 /* If Extended Inquiry Result events are supported, then
479 * they are clearly preferred over Inquiry Result with RSSI
480 * events.
481 */
482 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
483
484 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
485 }
486
487 if (lmp_inq_tx_pwr_capable(hdev))
488 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
489
490 if (lmp_ext_feat_capable(hdev)) {
491 struct hci_cp_read_local_ext_features cp;
492
493 cp.page = 0x01;
494 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
495 sizeof(cp), &cp);
496 }
497
498 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
499 u8 enable = 1;
500 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
501 &enable);
502 }
503
504 return 0;
505}
506
507static void hci_setup_link_policy(struct hci_request *req)
508{
509 struct hci_dev *hdev = req->hdev;
510 struct hci_cp_write_def_link_policy cp;
511 u16 link_policy = 0;
512
513 if (lmp_rswitch_capable(hdev))
514 link_policy |= HCI_LP_RSWITCH;
515 if (lmp_hold_capable(hdev))
516 link_policy |= HCI_LP_HOLD;
517 if (lmp_sniff_capable(hdev))
518 link_policy |= HCI_LP_SNIFF;
519 if (lmp_park_capable(hdev))
520 link_policy |= HCI_LP_PARK;
521
522 cp.policy = cpu_to_le16(link_policy);
523 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
524}
525
526static void hci_set_le_support(struct hci_request *req)
527{
528 struct hci_dev *hdev = req->hdev;
529 struct hci_cp_write_le_host_supported cp;
530
531 /* LE-only devices do not support explicit enablement */
532 if (!lmp_bredr_capable(hdev))
533 return;
534
535 memset(&cp, 0, sizeof(cp));
536
537 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
538 cp.le = 0x01;
539 cp.simul = 0x00;
540 }
541
542 if (cp.le != lmp_host_le_capable(hdev))
543 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
544 &cp);
545}
546
547static void hci_set_event_mask_page_2(struct hci_request *req)
548{
549 struct hci_dev *hdev = req->hdev;
550 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
551 bool changed = false;
552
553 /* If Connectionless Slave Broadcast master role is supported
554 * enable all necessary events for it.
555 */
556 if (lmp_csb_master_capable(hdev)) {
557 events[1] |= 0x40; /* Triggered Clock Capture */
558 events[1] |= 0x80; /* Synchronization Train Complete */
559 events[2] |= 0x10; /* Slave Page Response Timeout */
560 events[2] |= 0x20; /* CSB Channel Map Change */
561 changed = true;
562 }
563
564 /* If Connectionless Slave Broadcast slave role is supported
565 * enable all necessary events for it.
566 */
567 if (lmp_csb_slave_capable(hdev)) {
568 events[2] |= 0x01; /* Synchronization Train Received */
569 events[2] |= 0x02; /* CSB Receive */
570 events[2] |= 0x04; /* CSB Timeout */
571 events[2] |= 0x08; /* Truncated Page Complete */
572 changed = true;
573 }
574
575 /* Enable Authenticated Payload Timeout Expired event if supported */
576 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
577 events[2] |= 0x80;
578 changed = true;
579 }
580
581 /* Some Broadcom based controllers indicate support for Set Event
582 * Mask Page 2 command, but then actually do not support it. Since
583 * the default value is all bits set to zero, the command is only
584 * required if the event mask has to be changed. In case no change
585 * to the event mask is needed, skip this command.
586 */
587 if (changed)
588 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
589 sizeof(events), events);
590}
591
592static int hci_init3_req(struct hci_request *req, unsigned long opt)
593{
594 struct hci_dev *hdev = req->hdev;
595 u8 p;
596
597 hci_setup_event_mask(req);
598
599 if (hdev->commands[6] & 0x20 &&
600 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
601 struct hci_cp_read_stored_link_key cp;
602
603 bacpy(&cp.bdaddr, BDADDR_ANY);
604 cp.read_all = 0x01;
605 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
606 }
607
608 if (hdev->commands[5] & 0x10)
609 hci_setup_link_policy(req);
610
611 if (hdev->commands[8] & 0x01)
612 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
613
614 /* Some older Broadcom based Bluetooth 1.2 controllers do not
615 * support the Read Page Scan Type command. Check support for
616 * this command in the bit mask of supported commands.
617 */
618 if (hdev->commands[13] & 0x01)
619 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
620
621 if (lmp_le_capable(hdev)) {
622 u8 events[8];
623
624 memset(events, 0, sizeof(events));
625
626 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
627 events[0] |= 0x10; /* LE Long Term Key Request */
628
629 /* If controller supports the Connection Parameters Request
630 * Link Layer Procedure, enable the corresponding event.
631 */
632 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
633 events[0] |= 0x20; /* LE Remote Connection
634 * Parameter Request
635 */
636
637 /* If the controller supports the Data Length Extension
638 * feature, enable the corresponding event.
639 */
640 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
641 events[0] |= 0x40; /* LE Data Length Change */
642
643 /* If the controller supports Extended Scanner Filter
644 * Policies, enable the correspondig event.
645 */
646 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
647 events[1] |= 0x04; /* LE Direct Advertising
648 * Report
649 */
650
651 /* If the controller supports Channel Selection Algorithm #2
652 * feature, enable the corresponding event.
653 */
654 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
655 events[2] |= 0x08; /* LE Channel Selection
656 * Algorithm
657 */
658
659 /* If the controller supports the LE Set Scan Enable command,
660 * enable the corresponding advertising report event.
661 */
662 if (hdev->commands[26] & 0x08)
663 events[0] |= 0x02; /* LE Advertising Report */
664
665 /* If the controller supports the LE Create Connection
666 * command, enable the corresponding event.
667 */
668 if (hdev->commands[26] & 0x10)
669 events[0] |= 0x01; /* LE Connection Complete */
670
671 /* If the controller supports the LE Connection Update
672 * command, enable the corresponding event.
673 */
674 if (hdev->commands[27] & 0x04)
675 events[0] |= 0x04; /* LE Connection Update
676 * Complete
677 */
678
679 /* If the controller supports the LE Read Remote Used Features
680 * command, enable the corresponding event.
681 */
682 if (hdev->commands[27] & 0x20)
683 events[0] |= 0x08; /* LE Read Remote Used
684 * Features Complete
685 */
686
687 /* If the controller supports the LE Read Local P-256
688 * Public Key command, enable the corresponding event.
689 */
690 if (hdev->commands[34] & 0x02)
691 events[0] |= 0x80; /* LE Read Local P-256
692 * Public Key Complete
693 */
694
695 /* If the controller supports the LE Generate DHKey
696 * command, enable the corresponding event.
697 */
698 if (hdev->commands[34] & 0x04)
699 events[1] |= 0x01; /* LE Generate DHKey Complete */
700
701 /* If the controller supports the LE Set Default PHY or
702 * LE Set PHY commands, enable the corresponding event.
703 */
704 if (hdev->commands[35] & (0x20 | 0x40))
705 events[1] |= 0x08; /* LE PHY Update Complete */
706
707 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
708 events);
709
710 if (hdev->commands[25] & 0x40) {
711 /* Read LE Advertising Channel TX Power */
712 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
713 }
714
715 if (hdev->commands[26] & 0x40) {
716 /* Read LE White List Size */
717 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
718 0, NULL);
719 }
720
721 if (hdev->commands[26] & 0x80) {
722 /* Clear LE White List */
723 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
724 }
725
726 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
727 /* Read LE Maximum Data Length */
728 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
729
730 /* Read LE Suggested Default Data Length */
731 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
732 }
733
734 hci_set_le_support(req);
735 }
736
737 /* Read features beyond page 1 if available */
738 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
739 struct hci_cp_read_local_ext_features cp;
740
741 cp.page = p;
742 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
743 sizeof(cp), &cp);
744 }
745
746 return 0;
747}
748
749static int hci_init4_req(struct hci_request *req, unsigned long opt)
750{
751 struct hci_dev *hdev = req->hdev;
752
753 /* Some Broadcom based Bluetooth controllers do not support the
754 * Delete Stored Link Key command. They are clearly indicating its
755 * absence in the bit mask of supported commands.
756 *
757 * Check the supported commands and only if the the command is marked
758 * as supported send it. If not supported assume that the controller
759 * does not have actual support for stored link keys which makes this
760 * command redundant anyway.
761 *
762 * Some controllers indicate that they support handling deleting
763 * stored link keys, but they don't. The quirk lets a driver
764 * just disable this command.
765 */
766 if (hdev->commands[6] & 0x80 &&
767 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
768 struct hci_cp_delete_stored_link_key cp;
769
770 bacpy(&cp.bdaddr, BDADDR_ANY);
771 cp.delete_all = 0x01;
772 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
773 sizeof(cp), &cp);
774 }
775
776 /* Set event mask page 2 if the HCI command for it is supported */
777 if (hdev->commands[22] & 0x04)
778 hci_set_event_mask_page_2(req);
779
780 /* Read local codec list if the HCI command is supported */
781 if (hdev->commands[29] & 0x20)
782 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
783
784 /* Get MWS transport configuration if the HCI command is supported */
785 if (hdev->commands[30] & 0x08)
786 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
787
788 /* Check for Synchronization Train support */
789 if (lmp_sync_train_capable(hdev))
790 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
791
792 /* Enable Secure Connections if supported and configured */
793 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
794 bredr_sc_enabled(hdev)) {
795 u8 support = 0x01;
796
797 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
798 sizeof(support), &support);
799 }
800
801 /* Set Suggested Default Data Length to maximum if supported */
802 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
803 struct hci_cp_le_write_def_data_len cp;
804
805 cp.tx_len = hdev->le_max_tx_len;
806 cp.tx_time = hdev->le_max_tx_time;
807 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
808 }
809
810 /* Set Default PHY parameters if command is supported */
811 if (hdev->commands[35] & 0x20) {
812 struct hci_cp_le_set_default_phy cp;
813
814 /* No transmitter PHY or receiver PHY preferences */
815 cp.all_phys = 0x03;
816 cp.tx_phys = 0;
817 cp.rx_phys = 0;
818
819 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
820 }
821
822 return 0;
823}
824
825static int __hci_init(struct hci_dev *hdev)
826{
827 int err;
828
829 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
830 if (err < 0)
831 return err;
832
833 if (hci_dev_test_flag(hdev, HCI_SETUP))
834 hci_debugfs_create_basic(hdev);
835
836 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
837 if (err < 0)
838 return err;
839
840 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
841 * BR/EDR/LE type controllers. AMP controllers only need the
842 * first two stages of init.
843 */
844 if (hdev->dev_type != HCI_PRIMARY)
845 return 0;
846
847 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
848 if (err < 0)
849 return err;
850
851 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
852 if (err < 0)
853 return err;
854
855 /* This function is only called when the controller is actually in
856 * configured state. When the controller is marked as unconfigured,
857 * this initialization procedure is not run.
858 *
859 * It means that it is possible that a controller runs through its
860 * setup phase and then discovers missing settings. If that is the
861 * case, then this function will not be called. It then will only
862 * be called during the config phase.
863 *
864 * So only when in setup phase or config phase, create the debugfs
865 * entries and register the SMP channels.
866 */
867 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
868 !hci_dev_test_flag(hdev, HCI_CONFIG))
869 return 0;
870
871 hci_debugfs_create_common(hdev);
872
873 if (lmp_bredr_capable(hdev))
874 hci_debugfs_create_bredr(hdev);
875
876 if (lmp_le_capable(hdev))
877 hci_debugfs_create_le(hdev);
878
879 return 0;
880}
881
882static int hci_init0_req(struct hci_request *req, unsigned long opt)
883{
884 struct hci_dev *hdev = req->hdev;
885
886 BT_DBG("%s %ld", hdev->name, opt);
887
888 /* Reset */
889 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
890 hci_reset_req(req, 0);
891
892 /* Read Local Version */
893 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
894
895 /* Read BD Address */
896 if (hdev->set_bdaddr)
897 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
898
899 return 0;
900}
901
902static int __hci_unconf_init(struct hci_dev *hdev)
903{
904 int err;
905
906 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
907 return 0;
908
909 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
910 if (err < 0)
911 return err;
912
913 if (hci_dev_test_flag(hdev, HCI_SETUP))
914 hci_debugfs_create_basic(hdev);
915
916 return 0;
917}
918
919static int hci_scan_req(struct hci_request *req, unsigned long opt)
920{
921 __u8 scan = opt;
922
923 BT_DBG("%s %x", req->hdev->name, scan);
924
925 /* Inquiry and Page scans */
926 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
927 return 0;
928}
929
930static int hci_auth_req(struct hci_request *req, unsigned long opt)
931{
932 __u8 auth = opt;
933
934 BT_DBG("%s %x", req->hdev->name, auth);
935
936 /* Authentication */
937 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
938 return 0;
939}
940
941static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
942{
943 __u8 encrypt = opt;
944
945 BT_DBG("%s %x", req->hdev->name, encrypt);
946
947 /* Encryption */
948 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
949 return 0;
950}
951
952static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
953{
954 __le16 policy = cpu_to_le16(opt);
955
956 BT_DBG("%s %x", req->hdev->name, policy);
957
958 /* Default link policy */
959 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
960 return 0;
961}
962
963/* Get HCI device by index.
964 * Device is held on return. */
965struct hci_dev *hci_dev_get(int index)
966{
967 struct hci_dev *hdev = NULL, *d;
968
969 BT_DBG("%d", index);
970
971 if (index < 0)
972 return NULL;
973
974 read_lock(&hci_dev_list_lock);
975 list_for_each_entry(d, &hci_dev_list, list) {
976 if (d->id == index) {
977 hdev = hci_dev_hold(d);
978 break;
979 }
980 }
981 read_unlock(&hci_dev_list_lock);
982 return hdev;
983}
984
985/* ---- Inquiry support ---- */
986
987bool hci_discovery_active(struct hci_dev *hdev)
988{
989 struct discovery_state *discov = &hdev->discovery;
990
991 switch (discov->state) {
992 case DISCOVERY_FINDING:
993 case DISCOVERY_RESOLVING:
994 return true;
995
996 default:
997 return false;
998 }
999}
1000
1001void hci_discovery_set_state(struct hci_dev *hdev, int state)
1002{
1003 int old_state = hdev->discovery.state;
1004
1005 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1006
1007 if (old_state == state)
1008 return;
1009
1010 hdev->discovery.state = state;
1011
1012 switch (state) {
1013 case DISCOVERY_STOPPED:
1014 hci_update_background_scan(hdev);
1015
1016 if (old_state != DISCOVERY_STARTING)
1017 mgmt_discovering(hdev, 0);
1018 break;
1019 case DISCOVERY_STARTING:
1020 break;
1021 case DISCOVERY_FINDING:
1022 mgmt_discovering(hdev, 1);
1023 break;
1024 case DISCOVERY_RESOLVING:
1025 break;
1026 case DISCOVERY_STOPPING:
1027 break;
1028 }
1029}
1030
1031void hci_inquiry_cache_flush(struct hci_dev *hdev)
1032{
1033 struct discovery_state *cache = &hdev->discovery;
1034 struct inquiry_entry *p, *n;
1035
1036 list_for_each_entry_safe(p, n, &cache->all, all) {
1037 list_del(&p->all);
1038 kfree(p);
1039 }
1040
1041 INIT_LIST_HEAD(&cache->unknown);
1042 INIT_LIST_HEAD(&cache->resolve);
1043}
1044
1045struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1046 bdaddr_t *bdaddr)
1047{
1048 struct discovery_state *cache = &hdev->discovery;
1049 struct inquiry_entry *e;
1050
1051 BT_DBG("cache %p, %pMR", cache, bdaddr);
1052
1053 list_for_each_entry(e, &cache->all, all) {
1054 if (!bacmp(&e->data.bdaddr, bdaddr))
1055 return e;
1056 }
1057
1058 return NULL;
1059}
1060
1061struct inquiry_entry *hci_inquiry_cache_lookup_unknown(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->unknown, list) {
1070 if (!bacmp(&e->data.bdaddr, bdaddr))
1071 return e;
1072 }
1073
1074 return NULL;
1075}
1076
1077struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1078 bdaddr_t *bdaddr,
1079 int state)
1080{
1081 struct discovery_state *cache = &hdev->discovery;
1082 struct inquiry_entry *e;
1083
1084 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1085
1086 list_for_each_entry(e, &cache->resolve, list) {
1087 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1088 return e;
1089 if (!bacmp(&e->data.bdaddr, bdaddr))
1090 return e;
1091 }
1092
1093 return NULL;
1094}
1095
1096void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1097 struct inquiry_entry *ie)
1098{
1099 struct discovery_state *cache = &hdev->discovery;
1100 struct list_head *pos = &cache->resolve;
1101 struct inquiry_entry *p;
1102
1103 list_del(&ie->list);
1104
1105 list_for_each_entry(p, &cache->resolve, list) {
1106 if (p->name_state != NAME_PENDING &&
1107 abs(p->data.rssi) >= abs(ie->data.rssi))
1108 break;
1109 pos = &p->list;
1110 }
1111
1112 list_add(&ie->list, pos);
1113}
1114
1115u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1116 bool name_known)
1117{
1118 struct discovery_state *cache = &hdev->discovery;
1119 struct inquiry_entry *ie;
1120 u32 flags = 0;
1121
1122 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1123
1124 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1125
1126 if (!data->ssp_mode)
1127 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1128
1129 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1130 if (ie) {
1131 if (!ie->data.ssp_mode)
1132 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1133
1134 if (ie->name_state == NAME_NEEDED &&
1135 data->rssi != ie->data.rssi) {
1136 ie->data.rssi = data->rssi;
1137 hci_inquiry_cache_update_resolve(hdev, ie);
1138 }
1139
1140 goto update;
1141 }
1142
1143 /* Entry not in the cache. Add new one. */
1144 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1145 if (!ie) {
1146 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1147 goto done;
1148 }
1149
1150 list_add(&ie->all, &cache->all);
1151
1152 if (name_known) {
1153 ie->name_state = NAME_KNOWN;
1154 } else {
1155 ie->name_state = NAME_NOT_KNOWN;
1156 list_add(&ie->list, &cache->unknown);
1157 }
1158
1159update:
1160 if (name_known && ie->name_state != NAME_KNOWN &&
1161 ie->name_state != NAME_PENDING) {
1162 ie->name_state = NAME_KNOWN;
1163 list_del(&ie->list);
1164 }
1165
1166 memcpy(&ie->data, data, sizeof(*data));
1167 ie->timestamp = jiffies;
1168 cache->timestamp = jiffies;
1169
1170 if (ie->name_state == NAME_NOT_KNOWN)
1171 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1172
1173done:
1174 return flags;
1175}
1176
1177static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1178{
1179 struct discovery_state *cache = &hdev->discovery;
1180 struct inquiry_info *info = (struct inquiry_info *) buf;
1181 struct inquiry_entry *e;
1182 int copied = 0;
1183
1184 list_for_each_entry(e, &cache->all, all) {
1185 struct inquiry_data *data = &e->data;
1186
1187 if (copied >= num)
1188 break;
1189
1190 bacpy(&info->bdaddr, &data->bdaddr);
1191 info->pscan_rep_mode = data->pscan_rep_mode;
1192 info->pscan_period_mode = data->pscan_period_mode;
1193 info->pscan_mode = data->pscan_mode;
1194 memcpy(info->dev_class, data->dev_class, 3);
1195 info->clock_offset = data->clock_offset;
1196
1197 info++;
1198 copied++;
1199 }
1200
1201 BT_DBG("cache %p, copied %d", cache, copied);
1202 return copied;
1203}
1204
1205static int hci_inq_req(struct hci_request *req, unsigned long opt)
1206{
1207 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1208 struct hci_dev *hdev = req->hdev;
1209 struct hci_cp_inquiry cp;
1210
1211 BT_DBG("%s", hdev->name);
1212
1213 if (test_bit(HCI_INQUIRY, &hdev->flags))
1214 return 0;
1215
1216 /* Start Inquiry */
1217 memcpy(&cp.lap, &ir->lap, 3);
1218 cp.length = ir->length;
1219 cp.num_rsp = ir->num_rsp;
1220 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1221
1222 return 0;
1223}
1224
1225int hci_inquiry(void __user *arg)
1226{
1227 __u8 __user *ptr = arg;
1228 struct hci_inquiry_req ir;
1229 struct hci_dev *hdev;
1230 int err = 0, do_inquiry = 0, max_rsp;
1231 long timeo;
1232 __u8 *buf;
1233
1234 if (copy_from_user(&ir, ptr, sizeof(ir)))
1235 return -EFAULT;
1236
1237 hdev = hci_dev_get(ir.dev_id);
1238 if (!hdev)
1239 return -ENODEV;
1240
1241 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1242 err = -EBUSY;
1243 goto done;
1244 }
1245
1246 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1247 err = -EOPNOTSUPP;
1248 goto done;
1249 }
1250
1251 if (hdev->dev_type != HCI_PRIMARY) {
1252 err = -EOPNOTSUPP;
1253 goto done;
1254 }
1255
1256 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1257 err = -EOPNOTSUPP;
1258 goto done;
1259 }
1260
1261 hci_dev_lock(hdev);
1262 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1263 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1264 hci_inquiry_cache_flush(hdev);
1265 do_inquiry = 1;
1266 }
1267 hci_dev_unlock(hdev);
1268
1269 timeo = ir.length * msecs_to_jiffies(2000);
1270
1271 if (do_inquiry) {
1272 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1273 timeo, NULL);
1274 if (err < 0)
1275 goto done;
1276
1277 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1278 * cleared). If it is interrupted by a signal, return -EINTR.
1279 */
1280 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1281 TASK_INTERRUPTIBLE))
1282 return -EINTR;
1283 }
1284
1285 /* for unlimited number of responses we will use buffer with
1286 * 255 entries
1287 */
1288 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1289
1290 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1291 * copy it to the user space.
1292 */
1293 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1294 if (!buf) {
1295 err = -ENOMEM;
1296 goto done;
1297 }
1298
1299 hci_dev_lock(hdev);
1300 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1301 hci_dev_unlock(hdev);
1302
1303 BT_DBG("num_rsp %d", ir.num_rsp);
1304
1305 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1306 ptr += sizeof(ir);
1307 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1308 ir.num_rsp))
1309 err = -EFAULT;
1310 } else
1311 err = -EFAULT;
1312
1313 kfree(buf);
1314
1315done:
1316 hci_dev_put(hdev);
1317 return err;
1318}
1319
1320static int hci_dev_do_open(struct hci_dev *hdev)
1321{
1322 int ret = 0;
1323
1324 BT_DBG("%s %p", hdev->name, hdev);
1325
1326 hci_req_sync_lock(hdev);
1327
1328 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1329 ret = -ENODEV;
1330 goto done;
1331 }
1332
1333 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1334 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1335 /* Check for rfkill but allow the HCI setup stage to
1336 * proceed (which in itself doesn't cause any RF activity).
1337 */
1338 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1339 ret = -ERFKILL;
1340 goto done;
1341 }
1342
1343 /* Check for valid public address or a configured static
1344 * random adddress, but let the HCI setup proceed to
1345 * be able to determine if there is a public address
1346 * or not.
1347 *
1348 * In case of user channel usage, it is not important
1349 * if a public address or static random address is
1350 * available.
1351 *
1352 * This check is only valid for BR/EDR controllers
1353 * since AMP controllers do not have an address.
1354 */
1355 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1356 hdev->dev_type == HCI_PRIMARY &&
1357 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1358 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1359 ret = -EADDRNOTAVAIL;
1360 goto done;
1361 }
1362 }
1363
1364 if (test_bit(HCI_UP, &hdev->flags)) {
1365 ret = -EALREADY;
1366 goto done;
1367 }
1368
1369 if (hdev->open(hdev)) {
1370 ret = -EIO;
1371 goto done;
1372 }
1373
1374 set_bit(HCI_RUNNING, &hdev->flags);
1375 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1376
1377 atomic_set(&hdev->cmd_cnt, 1);
1378 set_bit(HCI_INIT, &hdev->flags);
1379
1380 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1381 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1382
1383 if (hdev->setup)
1384 ret = hdev->setup(hdev);
1385
1386 /* The transport driver can set these quirks before
1387 * creating the HCI device or in its setup callback.
1388 *
1389 * In case any of them is set, the controller has to
1390 * start up as unconfigured.
1391 */
1392 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1393 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1394 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1395
1396 /* For an unconfigured controller it is required to
1397 * read at least the version information provided by
1398 * the Read Local Version Information command.
1399 *
1400 * If the set_bdaddr driver callback is provided, then
1401 * also the original Bluetooth public device address
1402 * will be read using the Read BD Address command.
1403 */
1404 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1405 ret = __hci_unconf_init(hdev);
1406 }
1407
1408 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1409 /* If public address change is configured, ensure that
1410 * the address gets programmed. If the driver does not
1411 * support changing the public address, fail the power
1412 * on procedure.
1413 */
1414 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1415 hdev->set_bdaddr)
1416 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1417 else
1418 ret = -EADDRNOTAVAIL;
1419 }
1420
1421 if (!ret) {
1422 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1423 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1424 ret = __hci_init(hdev);
1425 if (!ret && hdev->post_init)
1426 ret = hdev->post_init(hdev);
1427 }
1428 }
1429
1430 /* If the HCI Reset command is clearing all diagnostic settings,
1431 * then they need to be reprogrammed after the init procedure
1432 * completed.
1433 */
1434 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1435 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1436 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1437 ret = hdev->set_diag(hdev, true);
1438
1439 clear_bit(HCI_INIT, &hdev->flags);
1440
1441 if (!ret) {
1442 hci_dev_hold(hdev);
1443 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1444 set_bit(HCI_UP, &hdev->flags);
1445 hci_sock_dev_event(hdev, HCI_DEV_UP);
1446 hci_leds_update_powered(hdev, true);
1447 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1448 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1449 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1450 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1451 hci_dev_test_flag(hdev, HCI_MGMT) &&
1452 hdev->dev_type == HCI_PRIMARY) {
1453 ret = __hci_req_hci_power_on(hdev);
1454 mgmt_power_on(hdev, ret);
1455 }
1456 } else {
1457 /* Init failed, cleanup */
1458 flush_work(&hdev->tx_work);
1459 flush_work(&hdev->cmd_work);
1460 flush_work(&hdev->rx_work);
1461
1462 skb_queue_purge(&hdev->cmd_q);
1463 skb_queue_purge(&hdev->rx_q);
1464
1465 if (hdev->flush)
1466 hdev->flush(hdev);
1467
1468 if (hdev->sent_cmd) {
1469 kfree_skb(hdev->sent_cmd);
1470 hdev->sent_cmd = NULL;
1471 }
1472
1473 clear_bit(HCI_RUNNING, &hdev->flags);
1474 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1475
1476 hdev->close(hdev);
1477 hdev->flags &= BIT(HCI_RAW);
1478 }
1479
1480done:
1481 hci_req_sync_unlock(hdev);
1482 return ret;
1483}
1484
1485/* ---- HCI ioctl helpers ---- */
1486
1487int hci_dev_open(__u16 dev)
1488{
1489 struct hci_dev *hdev;
1490 int err;
1491
1492 hdev = hci_dev_get(dev);
1493 if (!hdev)
1494 return -ENODEV;
1495
1496 /* Devices that are marked as unconfigured can only be powered
1497 * up as user channel. Trying to bring them up as normal devices
1498 * will result into a failure. Only user channel operation is
1499 * possible.
1500 *
1501 * When this function is called for a user channel, the flag
1502 * HCI_USER_CHANNEL will be set first before attempting to
1503 * open the device.
1504 */
1505 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1506 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1507 err = -EOPNOTSUPP;
1508 goto done;
1509 }
1510
1511 /* We need to ensure that no other power on/off work is pending
1512 * before proceeding to call hci_dev_do_open. This is
1513 * particularly important if the setup procedure has not yet
1514 * completed.
1515 */
1516 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1517 cancel_delayed_work(&hdev->power_off);
1518
1519 /* After this call it is guaranteed that the setup procedure
1520 * has finished. This means that error conditions like RFKILL
1521 * or no valid public or static random address apply.
1522 */
1523 flush_workqueue(hdev->req_workqueue);
1524
1525 /* For controllers not using the management interface and that
1526 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1527 * so that pairing works for them. Once the management interface
1528 * is in use this bit will be cleared again and userspace has
1529 * to explicitly enable it.
1530 */
1531 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1532 !hci_dev_test_flag(hdev, HCI_MGMT))
1533 hci_dev_set_flag(hdev, HCI_BONDABLE);
1534
1535 err = hci_dev_do_open(hdev);
1536
1537done:
1538 hci_dev_put(hdev);
1539 return err;
1540}
1541
1542/* This function requires the caller holds hdev->lock */
1543static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1544{
1545 struct hci_conn_params *p;
1546
1547 list_for_each_entry(p, &hdev->le_conn_params, list) {
1548 if (p->conn) {
1549 hci_conn_drop(p->conn);
1550 hci_conn_put(p->conn);
1551 p->conn = NULL;
1552 }
1553 list_del_init(&p->action);
1554 }
1555
1556 BT_DBG("All LE pending actions cleared");
1557}
1558
1559int hci_dev_do_close(struct hci_dev *hdev)
1560{
1561 bool auto_off;
1562
1563 BT_DBG("%s %p", hdev->name, hdev);
1564
1565 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1566 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1567 test_bit(HCI_UP, &hdev->flags)) {
1568 /* Execute vendor specific shutdown routine */
1569 if (hdev->shutdown)
1570 hdev->shutdown(hdev);
1571 }
1572
1573 cancel_delayed_work(&hdev->power_off);
1574
1575 hci_request_cancel_all(hdev);
1576 hci_req_sync_lock(hdev);
1577
1578 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1579 cancel_delayed_work_sync(&hdev->cmd_timer);
1580 hci_req_sync_unlock(hdev);
1581 return 0;
1582 }
1583
1584 hci_leds_update_powered(hdev, false);
1585
1586 /* Flush RX and TX works */
1587 flush_work(&hdev->tx_work);
1588 flush_work(&hdev->rx_work);
1589
1590 if (hdev->discov_timeout > 0) {
1591 hdev->discov_timeout = 0;
1592 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1593 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1594 }
1595
1596 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1597 cancel_delayed_work(&hdev->service_cache);
1598
1599 if (hci_dev_test_flag(hdev, HCI_MGMT))
1600 cancel_delayed_work_sync(&hdev->rpa_expired);
1601
1602 /* Avoid potential lockdep warnings from the *_flush() calls by
1603 * ensuring the workqueue is empty up front.
1604 */
1605 drain_workqueue(hdev->workqueue);
1606
1607 hci_dev_lock(hdev);
1608
1609 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1610
1611 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1612
1613 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1614 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1615 hci_dev_test_flag(hdev, HCI_MGMT))
1616 __mgmt_power_off(hdev);
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_sock_dev_event(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 (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1634 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1635 set_bit(HCI_INIT, &hdev->flags);
1636 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1637 clear_bit(HCI_INIT, &hdev->flags);
1638 }
1639
1640 /* flush cmd work */
1641 flush_work(&hdev->cmd_work);
1642
1643 /* Drop queues */
1644 skb_queue_purge(&hdev->rx_q);
1645 skb_queue_purge(&hdev->cmd_q);
1646 skb_queue_purge(&hdev->raw_q);
1647
1648 /* Drop last sent command */
1649 if (hdev->sent_cmd) {
1650 cancel_delayed_work_sync(&hdev->cmd_timer);
1651 kfree_skb(hdev->sent_cmd);
1652 hdev->sent_cmd = NULL;
1653 }
1654
1655 clear_bit(HCI_RUNNING, &hdev->flags);
1656 hci_sock_dev_event(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_sync_unlock(hdev);
1674
1675 hci_dev_put(hdev);
1676 return 0;
1677}
1678
1679int 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
1698done:
1699 hci_dev_put(hdev);
1700 return err;
1701}
1702
1703static 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_sync_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, NULL);
1732
1733 hci_req_sync_unlock(hdev);
1734 return ret;
1735}
1736
1737int 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
1763done:
1764 hci_dev_put(hdev);
1765 return err;
1766}
1767
1768int 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
1789done:
1790 hci_dev_put(hdev);
1791 return ret;
1792}
1793
1794static 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 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1825
1826 mgmt_new_settings(hdev);
1827 }
1828}
1829
1830int 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_PRIMARY) {
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, NULL);
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, NULL);
1879 if (err)
1880 break;
1881 }
1882
1883 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1884 HCI_INIT_TIMEOUT, NULL);
1885 break;
1886
1887 case HCISETSCAN:
1888 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1889 HCI_INIT_TIMEOUT, NULL);
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, NULL);
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
1927done:
1928 hci_dev_put(hdev);
1929 return err;
1930}
1931
1932int 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
1982int 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
2037static 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
2058static const struct rfkill_ops hci_rfkill_ops = {
2059 .set_block = hci_rfkill_set_block,
2060};
2061
2062static 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 if (test_bit(HCI_UP, &hdev->flags) &&
2070 hci_dev_test_flag(hdev, HCI_MGMT) &&
2071 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2072 cancel_delayed_work(&hdev->power_off);
2073 hci_req_sync_lock(hdev);
2074 err = __hci_req_hci_power_on(hdev);
2075 hci_req_sync_unlock(hdev);
2076 mgmt_power_on(hdev, err);
2077 return;
2078 }
2079
2080 err = hci_dev_do_open(hdev);
2081 if (err < 0) {
2082 hci_dev_lock(hdev);
2083 mgmt_set_powered_failed(hdev, err);
2084 hci_dev_unlock(hdev);
2085 return;
2086 }
2087
2088 /* During the HCI setup phase, a few error conditions are
2089 * ignored and they need to be checked now. If they are still
2090 * valid, it is important to turn the device back off.
2091 */
2092 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2093 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2094 (hdev->dev_type == HCI_PRIMARY &&
2095 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2096 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2097 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2098 hci_dev_do_close(hdev);
2099 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2100 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2101 HCI_AUTO_OFF_TIMEOUT);
2102 }
2103
2104 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2105 /* For unconfigured devices, set the HCI_RAW flag
2106 * so that userspace can easily identify them.
2107 */
2108 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2109 set_bit(HCI_RAW, &hdev->flags);
2110
2111 /* For fully configured devices, this will send
2112 * the Index Added event. For unconfigured devices,
2113 * it will send Unconfigued Index Added event.
2114 *
2115 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2116 * and no event will be send.
2117 */
2118 mgmt_index_added(hdev);
2119 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2120 /* When the controller is now configured, then it
2121 * is important to clear the HCI_RAW flag.
2122 */
2123 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2124 clear_bit(HCI_RAW, &hdev->flags);
2125
2126 /* Powering on the controller with HCI_CONFIG set only
2127 * happens with the transition from unconfigured to
2128 * configured. This will send the Index Added event.
2129 */
2130 mgmt_index_added(hdev);
2131 }
2132}
2133
2134static void hci_power_off(struct work_struct *work)
2135{
2136 struct hci_dev *hdev = container_of(work, struct hci_dev,
2137 power_off.work);
2138
2139 BT_DBG("%s", hdev->name);
2140
2141 hci_dev_do_close(hdev);
2142}
2143
2144static void hci_error_reset(struct work_struct *work)
2145{
2146 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2147
2148 BT_DBG("%s", hdev->name);
2149
2150 if (hdev->hw_error)
2151 hdev->hw_error(hdev, hdev->hw_error_code);
2152 else
2153 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2154
2155 if (hci_dev_do_close(hdev))
2156 return;
2157
2158 hci_dev_do_open(hdev);
2159}
2160
2161void hci_uuids_clear(struct hci_dev *hdev)
2162{
2163 struct bt_uuid *uuid, *tmp;
2164
2165 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2166 list_del(&uuid->list);
2167 kfree(uuid);
2168 }
2169}
2170
2171void hci_link_keys_clear(struct hci_dev *hdev)
2172{
2173 struct link_key *key;
2174
2175 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2176 list_del_rcu(&key->list);
2177 kfree_rcu(key, rcu);
2178 }
2179}
2180
2181void hci_smp_ltks_clear(struct hci_dev *hdev)
2182{
2183 struct smp_ltk *k;
2184
2185 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2186 list_del_rcu(&k->list);
2187 kfree_rcu(k, rcu);
2188 }
2189}
2190
2191void hci_smp_irks_clear(struct hci_dev *hdev)
2192{
2193 struct smp_irk *k;
2194
2195 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2196 list_del_rcu(&k->list);
2197 kfree_rcu(k, rcu);
2198 }
2199}
2200
2201struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2202{
2203 struct link_key *k;
2204
2205 rcu_read_lock();
2206 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2207 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2208 rcu_read_unlock();
2209 return k;
2210 }
2211 }
2212 rcu_read_unlock();
2213
2214 return NULL;
2215}
2216
2217static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2218 u8 key_type, u8 old_key_type)
2219{
2220 /* Legacy key */
2221 if (key_type < 0x03)
2222 return true;
2223
2224 /* Debug keys are insecure so don't store them persistently */
2225 if (key_type == HCI_LK_DEBUG_COMBINATION)
2226 return false;
2227
2228 /* Changed combination key and there's no previous one */
2229 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2230 return false;
2231
2232 /* Security mode 3 case */
2233 if (!conn)
2234 return true;
2235
2236 /* BR/EDR key derived using SC from an LE link */
2237 if (conn->type == LE_LINK)
2238 return true;
2239
2240 /* Neither local nor remote side had no-bonding as requirement */
2241 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2242 return true;
2243
2244 /* Local side had dedicated bonding as requirement */
2245 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2246 return true;
2247
2248 /* Remote side had dedicated bonding as requirement */
2249 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2250 return true;
2251
2252 /* If none of the above criteria match, then don't store the key
2253 * persistently */
2254 return false;
2255}
2256
2257static u8 ltk_role(u8 type)
2258{
2259 if (type == SMP_LTK)
2260 return HCI_ROLE_MASTER;
2261
2262 return HCI_ROLE_SLAVE;
2263}
2264
2265struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2266 u8 addr_type, u8 role)
2267{
2268 struct smp_ltk *k;
2269
2270 rcu_read_lock();
2271 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2272 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2273 continue;
2274
2275 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2276 rcu_read_unlock();
2277 return k;
2278 }
2279 }
2280 rcu_read_unlock();
2281
2282 return NULL;
2283}
2284
2285struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2286{
2287 struct smp_irk *irk;
2288
2289 rcu_read_lock();
2290 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2291 if (!bacmp(&irk->rpa, rpa)) {
2292 rcu_read_unlock();
2293 return irk;
2294 }
2295 }
2296
2297 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2298 if (smp_irk_matches(hdev, irk->val, rpa)) {
2299 bacpy(&irk->rpa, rpa);
2300 rcu_read_unlock();
2301 return irk;
2302 }
2303 }
2304 rcu_read_unlock();
2305
2306 return NULL;
2307}
2308
2309struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2310 u8 addr_type)
2311{
2312 struct smp_irk *irk;
2313
2314 /* Identity Address must be public or static random */
2315 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2316 return NULL;
2317
2318 rcu_read_lock();
2319 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2320 if (addr_type == irk->addr_type &&
2321 bacmp(bdaddr, &irk->bdaddr) == 0) {
2322 rcu_read_unlock();
2323 return irk;
2324 }
2325 }
2326 rcu_read_unlock();
2327
2328 return NULL;
2329}
2330
2331struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2332 bdaddr_t *bdaddr, u8 *val, u8 type,
2333 u8 pin_len, bool *persistent)
2334{
2335 struct link_key *key, *old_key;
2336 u8 old_key_type;
2337
2338 old_key = hci_find_link_key(hdev, bdaddr);
2339 if (old_key) {
2340 old_key_type = old_key->type;
2341 key = old_key;
2342 } else {
2343 old_key_type = conn ? conn->key_type : 0xff;
2344 key = kzalloc(sizeof(*key), GFP_KERNEL);
2345 if (!key)
2346 return NULL;
2347 list_add_rcu(&key->list, &hdev->link_keys);
2348 }
2349
2350 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2351
2352 /* Some buggy controller combinations generate a changed
2353 * combination key for legacy pairing even when there's no
2354 * previous key */
2355 if (type == HCI_LK_CHANGED_COMBINATION &&
2356 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2357 type = HCI_LK_COMBINATION;
2358 if (conn)
2359 conn->key_type = type;
2360 }
2361
2362 bacpy(&key->bdaddr, bdaddr);
2363 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2364 key->pin_len = pin_len;
2365
2366 if (type == HCI_LK_CHANGED_COMBINATION)
2367 key->type = old_key_type;
2368 else
2369 key->type = type;
2370
2371 if (persistent)
2372 *persistent = hci_persistent_key(hdev, conn, type,
2373 old_key_type);
2374
2375 return key;
2376}
2377
2378struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2379 u8 addr_type, u8 type, u8 authenticated,
2380 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2381{
2382 struct smp_ltk *key, *old_key;
2383 u8 role = ltk_role(type);
2384
2385 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2386 if (old_key)
2387 key = old_key;
2388 else {
2389 key = kzalloc(sizeof(*key), GFP_KERNEL);
2390 if (!key)
2391 return NULL;
2392 list_add_rcu(&key->list, &hdev->long_term_keys);
2393 }
2394
2395 bacpy(&key->bdaddr, bdaddr);
2396 key->bdaddr_type = addr_type;
2397 memcpy(key->val, tk, sizeof(key->val));
2398 key->authenticated = authenticated;
2399 key->ediv = ediv;
2400 key->rand = rand;
2401 key->enc_size = enc_size;
2402 key->type = type;
2403
2404 return key;
2405}
2406
2407struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2408 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2409{
2410 struct smp_irk *irk;
2411
2412 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2413 if (!irk) {
2414 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2415 if (!irk)
2416 return NULL;
2417
2418 bacpy(&irk->bdaddr, bdaddr);
2419 irk->addr_type = addr_type;
2420
2421 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2422 }
2423
2424 memcpy(irk->val, val, 16);
2425 bacpy(&irk->rpa, rpa);
2426
2427 return irk;
2428}
2429
2430int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2431{
2432 struct link_key *key;
2433
2434 key = hci_find_link_key(hdev, bdaddr);
2435 if (!key)
2436 return -ENOENT;
2437
2438 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2439
2440 list_del_rcu(&key->list);
2441 kfree_rcu(key, rcu);
2442
2443 return 0;
2444}
2445
2446int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2447{
2448 struct smp_ltk *k;
2449 int removed = 0;
2450
2451 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2452 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2453 continue;
2454
2455 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2456
2457 list_del_rcu(&k->list);
2458 kfree_rcu(k, rcu);
2459 removed++;
2460 }
2461
2462 return removed ? 0 : -ENOENT;
2463}
2464
2465void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2466{
2467 struct smp_irk *k;
2468
2469 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2470 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2471 continue;
2472
2473 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2474
2475 list_del_rcu(&k->list);
2476 kfree_rcu(k, rcu);
2477 }
2478}
2479
2480bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2481{
2482 struct smp_ltk *k;
2483 struct smp_irk *irk;
2484 u8 addr_type;
2485
2486 if (type == BDADDR_BREDR) {
2487 if (hci_find_link_key(hdev, bdaddr))
2488 return true;
2489 return false;
2490 }
2491
2492 /* Convert to HCI addr type which struct smp_ltk uses */
2493 if (type == BDADDR_LE_PUBLIC)
2494 addr_type = ADDR_LE_DEV_PUBLIC;
2495 else
2496 addr_type = ADDR_LE_DEV_RANDOM;
2497
2498 irk = hci_get_irk(hdev, bdaddr, addr_type);
2499 if (irk) {
2500 bdaddr = &irk->bdaddr;
2501 addr_type = irk->addr_type;
2502 }
2503
2504 rcu_read_lock();
2505 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2506 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2507 rcu_read_unlock();
2508 return true;
2509 }
2510 }
2511 rcu_read_unlock();
2512
2513 return false;
2514}
2515
2516/* HCI command timer function */
2517static void hci_cmd_timeout(struct work_struct *work)
2518{
2519 struct hci_dev *hdev = container_of(work, struct hci_dev,
2520 cmd_timer.work);
2521
2522 if (hdev->sent_cmd) {
2523 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2524 u16 opcode = __le16_to_cpu(sent->opcode);
2525
2526 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2527 } else {
2528 bt_dev_err(hdev, "command tx timeout");
2529 }
2530
2531 atomic_set(&hdev->cmd_cnt, 1);
2532 queue_work(hdev->workqueue, &hdev->cmd_work);
2533}
2534
2535struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2536 bdaddr_t *bdaddr, u8 bdaddr_type)
2537{
2538 struct oob_data *data;
2539
2540 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2541 if (bacmp(bdaddr, &data->bdaddr) != 0)
2542 continue;
2543 if (data->bdaddr_type != bdaddr_type)
2544 continue;
2545 return data;
2546 }
2547
2548 return NULL;
2549}
2550
2551int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2552 u8 bdaddr_type)
2553{
2554 struct oob_data *data;
2555
2556 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2557 if (!data)
2558 return -ENOENT;
2559
2560 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2561
2562 list_del(&data->list);
2563 kfree(data);
2564
2565 return 0;
2566}
2567
2568void hci_remote_oob_data_clear(struct hci_dev *hdev)
2569{
2570 struct oob_data *data, *n;
2571
2572 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2573 list_del(&data->list);
2574 kfree(data);
2575 }
2576}
2577
2578int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2579 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2580 u8 *hash256, u8 *rand256)
2581{
2582 struct oob_data *data;
2583
2584 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2585 if (!data) {
2586 data = kmalloc(sizeof(*data), GFP_KERNEL);
2587 if (!data)
2588 return -ENOMEM;
2589
2590 bacpy(&data->bdaddr, bdaddr);
2591 data->bdaddr_type = bdaddr_type;
2592 list_add(&data->list, &hdev->remote_oob_data);
2593 }
2594
2595 if (hash192 && rand192) {
2596 memcpy(data->hash192, hash192, sizeof(data->hash192));
2597 memcpy(data->rand192, rand192, sizeof(data->rand192));
2598 if (hash256 && rand256)
2599 data->present = 0x03;
2600 } else {
2601 memset(data->hash192, 0, sizeof(data->hash192));
2602 memset(data->rand192, 0, sizeof(data->rand192));
2603 if (hash256 && rand256)
2604 data->present = 0x02;
2605 else
2606 data->present = 0x00;
2607 }
2608
2609 if (hash256 && rand256) {
2610 memcpy(data->hash256, hash256, sizeof(data->hash256));
2611 memcpy(data->rand256, rand256, sizeof(data->rand256));
2612 } else {
2613 memset(data->hash256, 0, sizeof(data->hash256));
2614 memset(data->rand256, 0, sizeof(data->rand256));
2615 if (hash192 && rand192)
2616 data->present = 0x01;
2617 }
2618
2619 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2620
2621 return 0;
2622}
2623
2624/* This function requires the caller holds hdev->lock */
2625struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2626{
2627 struct adv_info *adv_instance;
2628
2629 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2630 if (adv_instance->instance == instance)
2631 return adv_instance;
2632 }
2633
2634 return NULL;
2635}
2636
2637/* This function requires the caller holds hdev->lock */
2638struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2639{
2640 struct adv_info *cur_instance;
2641
2642 cur_instance = hci_find_adv_instance(hdev, instance);
2643 if (!cur_instance)
2644 return NULL;
2645
2646 if (cur_instance == list_last_entry(&hdev->adv_instances,
2647 struct adv_info, list))
2648 return list_first_entry(&hdev->adv_instances,
2649 struct adv_info, list);
2650 else
2651 return list_next_entry(cur_instance, list);
2652}
2653
2654/* This function requires the caller holds hdev->lock */
2655int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2656{
2657 struct adv_info *adv_instance;
2658
2659 adv_instance = hci_find_adv_instance(hdev, instance);
2660 if (!adv_instance)
2661 return -ENOENT;
2662
2663 BT_DBG("%s removing %dMR", hdev->name, instance);
2664
2665 if (hdev->cur_adv_instance == instance) {
2666 if (hdev->adv_instance_timeout) {
2667 cancel_delayed_work(&hdev->adv_instance_expire);
2668 hdev->adv_instance_timeout = 0;
2669 }
2670 hdev->cur_adv_instance = 0x00;
2671 }
2672
2673 list_del(&adv_instance->list);
2674 kfree(adv_instance);
2675
2676 hdev->adv_instance_cnt--;
2677
2678 return 0;
2679}
2680
2681/* This function requires the caller holds hdev->lock */
2682void hci_adv_instances_clear(struct hci_dev *hdev)
2683{
2684 struct adv_info *adv_instance, *n;
2685
2686 if (hdev->adv_instance_timeout) {
2687 cancel_delayed_work(&hdev->adv_instance_expire);
2688 hdev->adv_instance_timeout = 0;
2689 }
2690
2691 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2692 list_del(&adv_instance->list);
2693 kfree(adv_instance);
2694 }
2695
2696 hdev->adv_instance_cnt = 0;
2697 hdev->cur_adv_instance = 0x00;
2698}
2699
2700/* This function requires the caller holds hdev->lock */
2701int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2702 u16 adv_data_len, u8 *adv_data,
2703 u16 scan_rsp_len, u8 *scan_rsp_data,
2704 u16 timeout, u16 duration)
2705{
2706 struct adv_info *adv_instance;
2707
2708 adv_instance = hci_find_adv_instance(hdev, instance);
2709 if (adv_instance) {
2710 memset(adv_instance->adv_data, 0,
2711 sizeof(adv_instance->adv_data));
2712 memset(adv_instance->scan_rsp_data, 0,
2713 sizeof(adv_instance->scan_rsp_data));
2714 } else {
2715 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2716 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2717 return -EOVERFLOW;
2718
2719 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2720 if (!adv_instance)
2721 return -ENOMEM;
2722
2723 adv_instance->pending = true;
2724 adv_instance->instance = instance;
2725 list_add(&adv_instance->list, &hdev->adv_instances);
2726 hdev->adv_instance_cnt++;
2727 }
2728
2729 adv_instance->flags = flags;
2730 adv_instance->adv_data_len = adv_data_len;
2731 adv_instance->scan_rsp_len = scan_rsp_len;
2732
2733 if (adv_data_len)
2734 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2735
2736 if (scan_rsp_len)
2737 memcpy(adv_instance->scan_rsp_data,
2738 scan_rsp_data, scan_rsp_len);
2739
2740 adv_instance->timeout = timeout;
2741 adv_instance->remaining_time = timeout;
2742
2743 if (duration == 0)
2744 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2745 else
2746 adv_instance->duration = duration;
2747
2748 BT_DBG("%s for %dMR", hdev->name, instance);
2749
2750 return 0;
2751}
2752
2753struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2754 bdaddr_t *bdaddr, u8 type)
2755{
2756 struct bdaddr_list *b;
2757
2758 list_for_each_entry(b, bdaddr_list, list) {
2759 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2760 return b;
2761 }
2762
2763 return NULL;
2764}
2765
2766void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2767{
2768 struct bdaddr_list *b, *n;
2769
2770 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2771 list_del(&b->list);
2772 kfree(b);
2773 }
2774}
2775
2776int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2777{
2778 struct bdaddr_list *entry;
2779
2780 if (!bacmp(bdaddr, BDADDR_ANY))
2781 return -EBADF;
2782
2783 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2784 return -EEXIST;
2785
2786 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2787 if (!entry)
2788 return -ENOMEM;
2789
2790 bacpy(&entry->bdaddr, bdaddr);
2791 entry->bdaddr_type = type;
2792
2793 list_add(&entry->list, list);
2794
2795 return 0;
2796}
2797
2798int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2799{
2800 struct bdaddr_list *entry;
2801
2802 if (!bacmp(bdaddr, BDADDR_ANY)) {
2803 hci_bdaddr_list_clear(list);
2804 return 0;
2805 }
2806
2807 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2808 if (!entry)
2809 return -ENOENT;
2810
2811 list_del(&entry->list);
2812 kfree(entry);
2813
2814 return 0;
2815}
2816
2817/* This function requires the caller holds hdev->lock */
2818struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2819 bdaddr_t *addr, u8 addr_type)
2820{
2821 struct hci_conn_params *params;
2822
2823 list_for_each_entry(params, &hdev->le_conn_params, list) {
2824 if (bacmp(¶ms->addr, addr) == 0 &&
2825 params->addr_type == addr_type) {
2826 return params;
2827 }
2828 }
2829
2830 return NULL;
2831}
2832
2833/* This function requires the caller holds hdev->lock */
2834struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2835 bdaddr_t *addr, u8 addr_type)
2836{
2837 struct hci_conn_params *param;
2838
2839 list_for_each_entry(param, list, action) {
2840 if (bacmp(¶m->addr, addr) == 0 &&
2841 param->addr_type == addr_type)
2842 return param;
2843 }
2844
2845 return NULL;
2846}
2847
2848/* This function requires the caller holds hdev->lock */
2849struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2850 bdaddr_t *addr, u8 addr_type)
2851{
2852 struct hci_conn_params *params;
2853
2854 params = hci_conn_params_lookup(hdev, addr, addr_type);
2855 if (params)
2856 return params;
2857
2858 params = kzalloc(sizeof(*params), GFP_KERNEL);
2859 if (!params) {
2860 bt_dev_err(hdev, "out of memory");
2861 return NULL;
2862 }
2863
2864 bacpy(¶ms->addr, addr);
2865 params->addr_type = addr_type;
2866
2867 list_add(¶ms->list, &hdev->le_conn_params);
2868 INIT_LIST_HEAD(¶ms->action);
2869
2870 params->conn_min_interval = hdev->le_conn_min_interval;
2871 params->conn_max_interval = hdev->le_conn_max_interval;
2872 params->conn_latency = hdev->le_conn_latency;
2873 params->supervision_timeout = hdev->le_supv_timeout;
2874 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2875
2876 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2877
2878 return params;
2879}
2880
2881static void hci_conn_params_free(struct hci_conn_params *params)
2882{
2883 if (params->conn) {
2884 hci_conn_drop(params->conn);
2885 hci_conn_put(params->conn);
2886 }
2887
2888 list_del(¶ms->action);
2889 list_del(¶ms->list);
2890 kfree(params);
2891}
2892
2893/* This function requires the caller holds hdev->lock */
2894void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2895{
2896 struct hci_conn_params *params;
2897
2898 params = hci_conn_params_lookup(hdev, addr, addr_type);
2899 if (!params)
2900 return;
2901
2902 hci_conn_params_free(params);
2903
2904 hci_update_background_scan(hdev);
2905
2906 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2907}
2908
2909/* This function requires the caller holds hdev->lock */
2910void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2911{
2912 struct hci_conn_params *params, *tmp;
2913
2914 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2915 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2916 continue;
2917
2918 /* If trying to estabilish one time connection to disabled
2919 * device, leave the params, but mark them as just once.
2920 */
2921 if (params->explicit_connect) {
2922 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2923 continue;
2924 }
2925
2926 list_del(¶ms->list);
2927 kfree(params);
2928 }
2929
2930 BT_DBG("All LE disabled connection parameters were removed");
2931}
2932
2933/* This function requires the caller holds hdev->lock */
2934static void hci_conn_params_clear_all(struct hci_dev *hdev)
2935{
2936 struct hci_conn_params *params, *tmp;
2937
2938 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2939 hci_conn_params_free(params);
2940
2941 BT_DBG("All LE connection parameters were removed");
2942}
2943
2944/* Copy the Identity Address of the controller.
2945 *
2946 * If the controller has a public BD_ADDR, then by default use that one.
2947 * If this is a LE only controller without a public address, default to
2948 * the static random address.
2949 *
2950 * For debugging purposes it is possible to force controllers with a
2951 * public address to use the static random address instead.
2952 *
2953 * In case BR/EDR has been disabled on a dual-mode controller and
2954 * userspace has configured a static address, then that address
2955 * becomes the identity address instead of the public BR/EDR address.
2956 */
2957void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2958 u8 *bdaddr_type)
2959{
2960 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2961 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2962 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2963 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2964 bacpy(bdaddr, &hdev->static_addr);
2965 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2966 } else {
2967 bacpy(bdaddr, &hdev->bdaddr);
2968 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2969 }
2970}
2971
2972/* Alloc HCI device */
2973struct hci_dev *hci_alloc_dev(void)
2974{
2975 struct hci_dev *hdev;
2976
2977 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
2978 if (!hdev)
2979 return NULL;
2980
2981 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2982 hdev->esco_type = (ESCO_HV1);
2983 hdev->link_mode = (HCI_LM_ACCEPT);
2984 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2985 hdev->io_capability = 0x03; /* No Input No Output */
2986 hdev->manufacturer = 0xffff; /* Default to internal use */
2987 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2988 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2989 hdev->adv_instance_cnt = 0;
2990 hdev->cur_adv_instance = 0x00;
2991 hdev->adv_instance_timeout = 0;
2992
2993 hdev->sniff_max_interval = 800;
2994 hdev->sniff_min_interval = 80;
2995
2996 hdev->le_adv_channel_map = 0x07;
2997 hdev->le_adv_min_interval = 0x0800;
2998 hdev->le_adv_max_interval = 0x0800;
2999 hdev->le_scan_interval = 0x0060;
3000 hdev->le_scan_window = 0x0030;
3001 hdev->le_conn_min_interval = 0x0018;
3002 hdev->le_conn_max_interval = 0x0028;
3003 hdev->le_conn_latency = 0x0000;
3004 hdev->le_supv_timeout = 0x002a;
3005 hdev->le_def_tx_len = 0x001b;
3006 hdev->le_def_tx_time = 0x0148;
3007 hdev->le_max_tx_len = 0x001b;
3008 hdev->le_max_tx_time = 0x0148;
3009 hdev->le_max_rx_len = 0x001b;
3010 hdev->le_max_rx_time = 0x0148;
3011
3012 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3013 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3014 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3015 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3016
3017 mutex_init(&hdev->lock);
3018 mutex_init(&hdev->req_lock);
3019
3020 INIT_LIST_HEAD(&hdev->mgmt_pending);
3021 INIT_LIST_HEAD(&hdev->blacklist);
3022 INIT_LIST_HEAD(&hdev->whitelist);
3023 INIT_LIST_HEAD(&hdev->uuids);
3024 INIT_LIST_HEAD(&hdev->link_keys);
3025 INIT_LIST_HEAD(&hdev->long_term_keys);
3026 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3027 INIT_LIST_HEAD(&hdev->remote_oob_data);
3028 INIT_LIST_HEAD(&hdev->le_white_list);
3029 INIT_LIST_HEAD(&hdev->le_conn_params);
3030 INIT_LIST_HEAD(&hdev->pend_le_conns);
3031 INIT_LIST_HEAD(&hdev->pend_le_reports);
3032 INIT_LIST_HEAD(&hdev->conn_hash.list);
3033 INIT_LIST_HEAD(&hdev->adv_instances);
3034
3035 INIT_WORK(&hdev->rx_work, hci_rx_work);
3036 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3037 INIT_WORK(&hdev->tx_work, hci_tx_work);
3038 INIT_WORK(&hdev->power_on, hci_power_on);
3039 INIT_WORK(&hdev->error_reset, hci_error_reset);
3040
3041 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3042
3043 skb_queue_head_init(&hdev->rx_q);
3044 skb_queue_head_init(&hdev->cmd_q);
3045 skb_queue_head_init(&hdev->raw_q);
3046
3047 init_waitqueue_head(&hdev->req_wait_q);
3048
3049 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3050
3051 hci_request_setup(hdev);
3052
3053 hci_init_sysfs(hdev);
3054 discovery_init(hdev);
3055
3056 return hdev;
3057}
3058EXPORT_SYMBOL(hci_alloc_dev);
3059
3060/* Free HCI device */
3061void hci_free_dev(struct hci_dev *hdev)
3062{
3063 /* will free via device release */
3064 put_device(&hdev->dev);
3065}
3066EXPORT_SYMBOL(hci_free_dev);
3067
3068/* Register HCI device */
3069int hci_register_dev(struct hci_dev *hdev)
3070{
3071 int id, error;
3072
3073 if (!hdev->open || !hdev->close || !hdev->send)
3074 return -EINVAL;
3075
3076 /* Do not allow HCI_AMP devices to register at index 0,
3077 * so the index can be used as the AMP controller ID.
3078 */
3079 switch (hdev->dev_type) {
3080 case HCI_PRIMARY:
3081 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3082 break;
3083 case HCI_AMP:
3084 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3085 break;
3086 default:
3087 return -EINVAL;
3088 }
3089
3090 if (id < 0)
3091 return id;
3092
3093 sprintf(hdev->name, "hci%d", id);
3094 hdev->id = id;
3095
3096 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3097
3098 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3099 if (!hdev->workqueue) {
3100 error = -ENOMEM;
3101 goto err;
3102 }
3103
3104 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3105 hdev->name);
3106 if (!hdev->req_workqueue) {
3107 destroy_workqueue(hdev->workqueue);
3108 error = -ENOMEM;
3109 goto err;
3110 }
3111
3112 if (!IS_ERR_OR_NULL(bt_debugfs))
3113 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3114
3115 dev_set_name(&hdev->dev, "%s", hdev->name);
3116
3117 error = device_add(&hdev->dev);
3118 if (error < 0)
3119 goto err_wqueue;
3120
3121 hci_leds_init(hdev);
3122
3123 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3124 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3125 hdev);
3126 if (hdev->rfkill) {
3127 if (rfkill_register(hdev->rfkill) < 0) {
3128 rfkill_destroy(hdev->rfkill);
3129 hdev->rfkill = NULL;
3130 }
3131 }
3132
3133 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3134 hci_dev_set_flag(hdev, HCI_RFKILLED);
3135
3136 hci_dev_set_flag(hdev, HCI_SETUP);
3137 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3138
3139 if (hdev->dev_type == HCI_PRIMARY) {
3140 /* Assume BR/EDR support until proven otherwise (such as
3141 * through reading supported features during init.
3142 */
3143 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3144 }
3145
3146 write_lock(&hci_dev_list_lock);
3147 list_add(&hdev->list, &hci_dev_list);
3148 write_unlock(&hci_dev_list_lock);
3149
3150 /* Devices that are marked for raw-only usage are unconfigured
3151 * and should not be included in normal operation.
3152 */
3153 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3154 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3155
3156 hci_sock_dev_event(hdev, HCI_DEV_REG);
3157 hci_dev_hold(hdev);
3158
3159 queue_work(hdev->req_workqueue, &hdev->power_on);
3160
3161 return id;
3162
3163err_wqueue:
3164 destroy_workqueue(hdev->workqueue);
3165 destroy_workqueue(hdev->req_workqueue);
3166err:
3167 ida_simple_remove(&hci_index_ida, hdev->id);
3168
3169 return error;
3170}
3171EXPORT_SYMBOL(hci_register_dev);
3172
3173/* Unregister HCI device */
3174void hci_unregister_dev(struct hci_dev *hdev)
3175{
3176 int id;
3177
3178 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3179
3180 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3181
3182 id = hdev->id;
3183
3184 write_lock(&hci_dev_list_lock);
3185 list_del(&hdev->list);
3186 write_unlock(&hci_dev_list_lock);
3187
3188 cancel_work_sync(&hdev->power_on);
3189
3190 hci_dev_do_close(hdev);
3191
3192 if (!test_bit(HCI_INIT, &hdev->flags) &&
3193 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3194 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3195 hci_dev_lock(hdev);
3196 mgmt_index_removed(hdev);
3197 hci_dev_unlock(hdev);
3198 }
3199
3200 /* mgmt_index_removed should take care of emptying the
3201 * pending list */
3202 BUG_ON(!list_empty(&hdev->mgmt_pending));
3203
3204 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3205
3206 if (hdev->rfkill) {
3207 rfkill_unregister(hdev->rfkill);
3208 rfkill_destroy(hdev->rfkill);
3209 }
3210
3211 device_del(&hdev->dev);
3212
3213 debugfs_remove_recursive(hdev->debugfs);
3214 kfree_const(hdev->hw_info);
3215 kfree_const(hdev->fw_info);
3216
3217 destroy_workqueue(hdev->workqueue);
3218 destroy_workqueue(hdev->req_workqueue);
3219
3220 hci_dev_lock(hdev);
3221 hci_bdaddr_list_clear(&hdev->blacklist);
3222 hci_bdaddr_list_clear(&hdev->whitelist);
3223 hci_uuids_clear(hdev);
3224 hci_link_keys_clear(hdev);
3225 hci_smp_ltks_clear(hdev);
3226 hci_smp_irks_clear(hdev);
3227 hci_remote_oob_data_clear(hdev);
3228 hci_adv_instances_clear(hdev);
3229 hci_bdaddr_list_clear(&hdev->le_white_list);
3230 hci_conn_params_clear_all(hdev);
3231 hci_discovery_filter_clear(hdev);
3232 hci_dev_unlock(hdev);
3233
3234 hci_dev_put(hdev);
3235
3236 ida_simple_remove(&hci_index_ida, id);
3237}
3238EXPORT_SYMBOL(hci_unregister_dev);
3239
3240/* Suspend HCI device */
3241int hci_suspend_dev(struct hci_dev *hdev)
3242{
3243 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3244 return 0;
3245}
3246EXPORT_SYMBOL(hci_suspend_dev);
3247
3248/* Resume HCI device */
3249int hci_resume_dev(struct hci_dev *hdev)
3250{
3251 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3252 return 0;
3253}
3254EXPORT_SYMBOL(hci_resume_dev);
3255
3256/* Reset HCI device */
3257int hci_reset_dev(struct hci_dev *hdev)
3258{
3259 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3260 struct sk_buff *skb;
3261
3262 skb = bt_skb_alloc(3, GFP_ATOMIC);
3263 if (!skb)
3264 return -ENOMEM;
3265
3266 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3267 skb_put_data(skb, hw_err, 3);
3268
3269 /* Send Hardware Error to upper stack */
3270 return hci_recv_frame(hdev, skb);
3271}
3272EXPORT_SYMBOL(hci_reset_dev);
3273
3274/* Receive frame from HCI drivers */
3275int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3276{
3277 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3278 && !test_bit(HCI_INIT, &hdev->flags))) {
3279 kfree_skb(skb);
3280 return -ENXIO;
3281 }
3282
3283 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3284 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3285 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
3286 kfree_skb(skb);
3287 return -EINVAL;
3288 }
3289
3290 /* Incoming skb */
3291 bt_cb(skb)->incoming = 1;
3292
3293 /* Time stamp */
3294 __net_timestamp(skb);
3295
3296 skb_queue_tail(&hdev->rx_q, skb);
3297 queue_work(hdev->workqueue, &hdev->rx_work);
3298
3299 return 0;
3300}
3301EXPORT_SYMBOL(hci_recv_frame);
3302
3303/* Receive diagnostic message from HCI drivers */
3304int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3305{
3306 /* Mark as diagnostic packet */
3307 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3308
3309 /* Time stamp */
3310 __net_timestamp(skb);
3311
3312 skb_queue_tail(&hdev->rx_q, skb);
3313 queue_work(hdev->workqueue, &hdev->rx_work);
3314
3315 return 0;
3316}
3317EXPORT_SYMBOL(hci_recv_diag);
3318
3319void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3320{
3321 va_list vargs;
3322
3323 va_start(vargs, fmt);
3324 kfree_const(hdev->hw_info);
3325 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3326 va_end(vargs);
3327}
3328EXPORT_SYMBOL(hci_set_hw_info);
3329
3330void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3331{
3332 va_list vargs;
3333
3334 va_start(vargs, fmt);
3335 kfree_const(hdev->fw_info);
3336 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3337 va_end(vargs);
3338}
3339EXPORT_SYMBOL(hci_set_fw_info);
3340
3341/* ---- Interface to upper protocols ---- */
3342
3343int hci_register_cb(struct hci_cb *cb)
3344{
3345 BT_DBG("%p name %s", cb, cb->name);
3346
3347 mutex_lock(&hci_cb_list_lock);
3348 list_add_tail(&cb->list, &hci_cb_list);
3349 mutex_unlock(&hci_cb_list_lock);
3350
3351 return 0;
3352}
3353EXPORT_SYMBOL(hci_register_cb);
3354
3355int hci_unregister_cb(struct hci_cb *cb)
3356{
3357 BT_DBG("%p name %s", cb, cb->name);
3358
3359 mutex_lock(&hci_cb_list_lock);
3360 list_del(&cb->list);
3361 mutex_unlock(&hci_cb_list_lock);
3362
3363 return 0;
3364}
3365EXPORT_SYMBOL(hci_unregister_cb);
3366
3367static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3368{
3369 int err;
3370
3371 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3372 skb->len);
3373
3374 /* Time stamp */
3375 __net_timestamp(skb);
3376
3377 /* Send copy to monitor */
3378 hci_send_to_monitor(hdev, skb);
3379
3380 if (atomic_read(&hdev->promisc)) {
3381 /* Send copy to the sockets */
3382 hci_send_to_sock(hdev, skb);
3383 }
3384
3385 /* Get rid of skb owner, prior to sending to the driver. */
3386 skb_orphan(skb);
3387
3388 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3389 kfree_skb(skb);
3390 return;
3391 }
3392
3393 err = hdev->send(hdev, skb);
3394 if (err < 0) {
3395 bt_dev_err(hdev, "sending frame failed (%d)", err);
3396 kfree_skb(skb);
3397 }
3398}
3399
3400/* Send HCI command */
3401int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3402 const void *param)
3403{
3404 struct sk_buff *skb;
3405
3406 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3407
3408 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3409 if (!skb) {
3410 bt_dev_err(hdev, "no memory for command");
3411 return -ENOMEM;
3412 }
3413
3414 /* Stand-alone HCI commands must be flagged as
3415 * single-command requests.
3416 */
3417 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3418
3419 skb_queue_tail(&hdev->cmd_q, skb);
3420 queue_work(hdev->workqueue, &hdev->cmd_work);
3421
3422 return 0;
3423}
3424
3425/* Get data from the previously sent command */
3426void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3427{
3428 struct hci_command_hdr *hdr;
3429
3430 if (!hdev->sent_cmd)
3431 return NULL;
3432
3433 hdr = (void *) hdev->sent_cmd->data;
3434
3435 if (hdr->opcode != cpu_to_le16(opcode))
3436 return NULL;
3437
3438 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3439
3440 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3441}
3442
3443/* Send HCI command and wait for command commplete event */
3444struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3445 const void *param, u32 timeout)
3446{
3447 struct sk_buff *skb;
3448
3449 if (!test_bit(HCI_UP, &hdev->flags))
3450 return ERR_PTR(-ENETDOWN);
3451
3452 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3453
3454 hci_req_sync_lock(hdev);
3455 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3456 hci_req_sync_unlock(hdev);
3457
3458 return skb;
3459}
3460EXPORT_SYMBOL(hci_cmd_sync);
3461
3462/* Send ACL data */
3463static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3464{
3465 struct hci_acl_hdr *hdr;
3466 int len = skb->len;
3467
3468 skb_push(skb, HCI_ACL_HDR_SIZE);
3469 skb_reset_transport_header(skb);
3470 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3471 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3472 hdr->dlen = cpu_to_le16(len);
3473}
3474
3475static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3476 struct sk_buff *skb, __u16 flags)
3477{
3478 struct hci_conn *conn = chan->conn;
3479 struct hci_dev *hdev = conn->hdev;
3480 struct sk_buff *list;
3481
3482 skb->len = skb_headlen(skb);
3483 skb->data_len = 0;
3484
3485 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3486
3487 switch (hdev->dev_type) {
3488 case HCI_PRIMARY:
3489 hci_add_acl_hdr(skb, conn->handle, flags);
3490 break;
3491 case HCI_AMP:
3492 hci_add_acl_hdr(skb, chan->handle, flags);
3493 break;
3494 default:
3495 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3496 return;
3497 }
3498
3499 list = skb_shinfo(skb)->frag_list;
3500 if (!list) {
3501 /* Non fragmented */
3502 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3503
3504 skb_queue_tail(queue, skb);
3505 } else {
3506 /* Fragmented */
3507 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3508
3509 skb_shinfo(skb)->frag_list = NULL;
3510
3511 /* Queue all fragments atomically. We need to use spin_lock_bh
3512 * here because of 6LoWPAN links, as there this function is
3513 * called from softirq and using normal spin lock could cause
3514 * deadlocks.
3515 */
3516 spin_lock_bh(&queue->lock);
3517
3518 __skb_queue_tail(queue, skb);
3519
3520 flags &= ~ACL_START;
3521 flags |= ACL_CONT;
3522 do {
3523 skb = list; list = list->next;
3524
3525 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3526 hci_add_acl_hdr(skb, conn->handle, flags);
3527
3528 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3529
3530 __skb_queue_tail(queue, skb);
3531 } while (list);
3532
3533 spin_unlock_bh(&queue->lock);
3534 }
3535}
3536
3537void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3538{
3539 struct hci_dev *hdev = chan->conn->hdev;
3540
3541 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3542
3543 hci_queue_acl(chan, &chan->data_q, skb, flags);
3544
3545 queue_work(hdev->workqueue, &hdev->tx_work);
3546}
3547
3548/* Send SCO data */
3549void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3550{
3551 struct hci_dev *hdev = conn->hdev;
3552 struct hci_sco_hdr hdr;
3553
3554 BT_DBG("%s len %d", hdev->name, skb->len);
3555
3556 hdr.handle = cpu_to_le16(conn->handle);
3557 hdr.dlen = skb->len;
3558
3559 skb_push(skb, HCI_SCO_HDR_SIZE);
3560 skb_reset_transport_header(skb);
3561 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3562
3563 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3564
3565 skb_queue_tail(&conn->data_q, skb);
3566 queue_work(hdev->workqueue, &hdev->tx_work);
3567}
3568
3569/* ---- HCI TX task (outgoing data) ---- */
3570
3571/* HCI Connection scheduler */
3572static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3573 int *quote)
3574{
3575 struct hci_conn_hash *h = &hdev->conn_hash;
3576 struct hci_conn *conn = NULL, *c;
3577 unsigned int num = 0, min = ~0;
3578
3579 /* We don't have to lock device here. Connections are always
3580 * added and removed with TX task disabled. */
3581
3582 rcu_read_lock();
3583
3584 list_for_each_entry_rcu(c, &h->list, list) {
3585 if (c->type != type || skb_queue_empty(&c->data_q))
3586 continue;
3587
3588 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3589 continue;
3590
3591 num++;
3592
3593 if (c->sent < min) {
3594 min = c->sent;
3595 conn = c;
3596 }
3597
3598 if (hci_conn_num(hdev, type) == num)
3599 break;
3600 }
3601
3602 rcu_read_unlock();
3603
3604 if (conn) {
3605 int cnt, q;
3606
3607 switch (conn->type) {
3608 case ACL_LINK:
3609 cnt = hdev->acl_cnt;
3610 break;
3611 case SCO_LINK:
3612 case ESCO_LINK:
3613 cnt = hdev->sco_cnt;
3614 break;
3615 case LE_LINK:
3616 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3617 break;
3618 default:
3619 cnt = 0;
3620 bt_dev_err(hdev, "unknown link type %d", conn->type);
3621 }
3622
3623 q = cnt / num;
3624 *quote = q ? q : 1;
3625 } else
3626 *quote = 0;
3627
3628 BT_DBG("conn %p quote %d", conn, *quote);
3629 return conn;
3630}
3631
3632static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3633{
3634 struct hci_conn_hash *h = &hdev->conn_hash;
3635 struct hci_conn *c;
3636
3637 bt_dev_err(hdev, "link tx timeout");
3638
3639 rcu_read_lock();
3640
3641 /* Kill stalled connections */
3642 list_for_each_entry_rcu(c, &h->list, list) {
3643 if (c->type == type && c->sent) {
3644 bt_dev_err(hdev, "killing stalled connection %pMR",
3645 &c->dst);
3646 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3647 }
3648 }
3649
3650 rcu_read_unlock();
3651}
3652
3653static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3654 int *quote)
3655{
3656 struct hci_conn_hash *h = &hdev->conn_hash;
3657 struct hci_chan *chan = NULL;
3658 unsigned int num = 0, min = ~0, cur_prio = 0;
3659 struct hci_conn *conn;
3660 int cnt, q, conn_num = 0;
3661
3662 BT_DBG("%s", hdev->name);
3663
3664 rcu_read_lock();
3665
3666 list_for_each_entry_rcu(conn, &h->list, list) {
3667 struct hci_chan *tmp;
3668
3669 if (conn->type != type)
3670 continue;
3671
3672 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3673 continue;
3674
3675 conn_num++;
3676
3677 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3678 struct sk_buff *skb;
3679
3680 if (skb_queue_empty(&tmp->data_q))
3681 continue;
3682
3683 skb = skb_peek(&tmp->data_q);
3684 if (skb->priority < cur_prio)
3685 continue;
3686
3687 if (skb->priority > cur_prio) {
3688 num = 0;
3689 min = ~0;
3690 cur_prio = skb->priority;
3691 }
3692
3693 num++;
3694
3695 if (conn->sent < min) {
3696 min = conn->sent;
3697 chan = tmp;
3698 }
3699 }
3700
3701 if (hci_conn_num(hdev, type) == conn_num)
3702 break;
3703 }
3704
3705 rcu_read_unlock();
3706
3707 if (!chan)
3708 return NULL;
3709
3710 switch (chan->conn->type) {
3711 case ACL_LINK:
3712 cnt = hdev->acl_cnt;
3713 break;
3714 case AMP_LINK:
3715 cnt = hdev->block_cnt;
3716 break;
3717 case SCO_LINK:
3718 case ESCO_LINK:
3719 cnt = hdev->sco_cnt;
3720 break;
3721 case LE_LINK:
3722 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3723 break;
3724 default:
3725 cnt = 0;
3726 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
3727 }
3728
3729 q = cnt / num;
3730 *quote = q ? q : 1;
3731 BT_DBG("chan %p quote %d", chan, *quote);
3732 return chan;
3733}
3734
3735static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3736{
3737 struct hci_conn_hash *h = &hdev->conn_hash;
3738 struct hci_conn *conn;
3739 int num = 0;
3740
3741 BT_DBG("%s", hdev->name);
3742
3743 rcu_read_lock();
3744
3745 list_for_each_entry_rcu(conn, &h->list, list) {
3746 struct hci_chan *chan;
3747
3748 if (conn->type != type)
3749 continue;
3750
3751 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3752 continue;
3753
3754 num++;
3755
3756 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3757 struct sk_buff *skb;
3758
3759 if (chan->sent) {
3760 chan->sent = 0;
3761 continue;
3762 }
3763
3764 if (skb_queue_empty(&chan->data_q))
3765 continue;
3766
3767 skb = skb_peek(&chan->data_q);
3768 if (skb->priority >= HCI_PRIO_MAX - 1)
3769 continue;
3770
3771 skb->priority = HCI_PRIO_MAX - 1;
3772
3773 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3774 skb->priority);
3775 }
3776
3777 if (hci_conn_num(hdev, type) == num)
3778 break;
3779 }
3780
3781 rcu_read_unlock();
3782
3783}
3784
3785static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3786{
3787 /* Calculate count of blocks used by this packet */
3788 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3789}
3790
3791static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3792{
3793 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3794 /* ACL tx timeout must be longer than maximum
3795 * link supervision timeout (40.9 seconds) */
3796 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3797 HCI_ACL_TX_TIMEOUT))
3798 hci_link_tx_to(hdev, ACL_LINK);
3799 }
3800}
3801
3802static void hci_sched_acl_pkt(struct hci_dev *hdev)
3803{
3804 unsigned int cnt = hdev->acl_cnt;
3805 struct hci_chan *chan;
3806 struct sk_buff *skb;
3807 int quote;
3808
3809 __check_timeout(hdev, cnt);
3810
3811 while (hdev->acl_cnt &&
3812 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3813 u32 priority = (skb_peek(&chan->data_q))->priority;
3814 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3815 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3816 skb->len, skb->priority);
3817
3818 /* Stop if priority has changed */
3819 if (skb->priority < priority)
3820 break;
3821
3822 skb = skb_dequeue(&chan->data_q);
3823
3824 hci_conn_enter_active_mode(chan->conn,
3825 bt_cb(skb)->force_active);
3826
3827 hci_send_frame(hdev, skb);
3828 hdev->acl_last_tx = jiffies;
3829
3830 hdev->acl_cnt--;
3831 chan->sent++;
3832 chan->conn->sent++;
3833 }
3834 }
3835
3836 if (cnt != hdev->acl_cnt)
3837 hci_prio_recalculate(hdev, ACL_LINK);
3838}
3839
3840static void hci_sched_acl_blk(struct hci_dev *hdev)
3841{
3842 unsigned int cnt = hdev->block_cnt;
3843 struct hci_chan *chan;
3844 struct sk_buff *skb;
3845 int quote;
3846 u8 type;
3847
3848 __check_timeout(hdev, cnt);
3849
3850 BT_DBG("%s", hdev->name);
3851
3852 if (hdev->dev_type == HCI_AMP)
3853 type = AMP_LINK;
3854 else
3855 type = ACL_LINK;
3856
3857 while (hdev->block_cnt > 0 &&
3858 (chan = hci_chan_sent(hdev, type, "e))) {
3859 u32 priority = (skb_peek(&chan->data_q))->priority;
3860 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3861 int blocks;
3862
3863 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3864 skb->len, skb->priority);
3865
3866 /* Stop if priority has changed */
3867 if (skb->priority < priority)
3868 break;
3869
3870 skb = skb_dequeue(&chan->data_q);
3871
3872 blocks = __get_blocks(hdev, skb);
3873 if (blocks > hdev->block_cnt)
3874 return;
3875
3876 hci_conn_enter_active_mode(chan->conn,
3877 bt_cb(skb)->force_active);
3878
3879 hci_send_frame(hdev, skb);
3880 hdev->acl_last_tx = jiffies;
3881
3882 hdev->block_cnt -= blocks;
3883 quote -= blocks;
3884
3885 chan->sent += blocks;
3886 chan->conn->sent += blocks;
3887 }
3888 }
3889
3890 if (cnt != hdev->block_cnt)
3891 hci_prio_recalculate(hdev, type);
3892}
3893
3894static void hci_sched_acl(struct hci_dev *hdev)
3895{
3896 BT_DBG("%s", hdev->name);
3897
3898 /* No ACL link over BR/EDR controller */
3899 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
3900 return;
3901
3902 /* No AMP link over AMP controller */
3903 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3904 return;
3905
3906 switch (hdev->flow_ctl_mode) {
3907 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3908 hci_sched_acl_pkt(hdev);
3909 break;
3910
3911 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3912 hci_sched_acl_blk(hdev);
3913 break;
3914 }
3915}
3916
3917/* Schedule SCO */
3918static void hci_sched_sco(struct hci_dev *hdev)
3919{
3920 struct hci_conn *conn;
3921 struct sk_buff *skb;
3922 int quote;
3923
3924 BT_DBG("%s", hdev->name);
3925
3926 if (!hci_conn_num(hdev, SCO_LINK))
3927 return;
3928
3929 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3930 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3931 BT_DBG("skb %p len %d", skb, skb->len);
3932 hci_send_frame(hdev, skb);
3933
3934 conn->sent++;
3935 if (conn->sent == ~0)
3936 conn->sent = 0;
3937 }
3938 }
3939}
3940
3941static void hci_sched_esco(struct hci_dev *hdev)
3942{
3943 struct hci_conn *conn;
3944 struct sk_buff *skb;
3945 int quote;
3946
3947 BT_DBG("%s", hdev->name);
3948
3949 if (!hci_conn_num(hdev, ESCO_LINK))
3950 return;
3951
3952 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3953 "e))) {
3954 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3955 BT_DBG("skb %p len %d", skb, skb->len);
3956 hci_send_frame(hdev, skb);
3957
3958 conn->sent++;
3959 if (conn->sent == ~0)
3960 conn->sent = 0;
3961 }
3962 }
3963}
3964
3965static void hci_sched_le(struct hci_dev *hdev)
3966{
3967 struct hci_chan *chan;
3968 struct sk_buff *skb;
3969 int quote, cnt, tmp;
3970
3971 BT_DBG("%s", hdev->name);
3972
3973 if (!hci_conn_num(hdev, LE_LINK))
3974 return;
3975
3976 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3977 /* LE tx timeout must be longer than maximum
3978 * link supervision timeout (40.9 seconds) */
3979 if (!hdev->le_cnt && hdev->le_pkts &&
3980 time_after(jiffies, hdev->le_last_tx + HZ * 45))
3981 hci_link_tx_to(hdev, LE_LINK);
3982 }
3983
3984 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3985 tmp = cnt;
3986 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3987 u32 priority = (skb_peek(&chan->data_q))->priority;
3988 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3989 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3990 skb->len, skb->priority);
3991
3992 /* Stop if priority has changed */
3993 if (skb->priority < priority)
3994 break;
3995
3996 skb = skb_dequeue(&chan->data_q);
3997
3998 hci_send_frame(hdev, skb);
3999 hdev->le_last_tx = jiffies;
4000
4001 cnt--;
4002 chan->sent++;
4003 chan->conn->sent++;
4004 }
4005 }
4006
4007 if (hdev->le_pkts)
4008 hdev->le_cnt = cnt;
4009 else
4010 hdev->acl_cnt = cnt;
4011
4012 if (cnt != tmp)
4013 hci_prio_recalculate(hdev, LE_LINK);
4014}
4015
4016static void hci_tx_work(struct work_struct *work)
4017{
4018 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4019 struct sk_buff *skb;
4020
4021 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4022 hdev->sco_cnt, hdev->le_cnt);
4023
4024 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4025 /* Schedule queues and send stuff to HCI driver */
4026 hci_sched_acl(hdev);
4027 hci_sched_sco(hdev);
4028 hci_sched_esco(hdev);
4029 hci_sched_le(hdev);
4030 }
4031
4032 /* Send next queued raw (unknown type) packet */
4033 while ((skb = skb_dequeue(&hdev->raw_q)))
4034 hci_send_frame(hdev, skb);
4035}
4036
4037/* ----- HCI RX task (incoming data processing) ----- */
4038
4039/* ACL data packet */
4040static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4041{
4042 struct hci_acl_hdr *hdr = (void *) skb->data;
4043 struct hci_conn *conn;
4044 __u16 handle, flags;
4045
4046 skb_pull(skb, HCI_ACL_HDR_SIZE);
4047
4048 handle = __le16_to_cpu(hdr->handle);
4049 flags = hci_flags(handle);
4050 handle = hci_handle(handle);
4051
4052 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4053 handle, flags);
4054
4055 hdev->stat.acl_rx++;
4056
4057 hci_dev_lock(hdev);
4058 conn = hci_conn_hash_lookup_handle(hdev, handle);
4059 hci_dev_unlock(hdev);
4060
4061 if (conn) {
4062 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4063
4064 /* Send to upper protocol */
4065 l2cap_recv_acldata(conn, skb, flags);
4066 return;
4067 } else {
4068 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4069 handle);
4070 }
4071
4072 kfree_skb(skb);
4073}
4074
4075/* SCO data packet */
4076static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4077{
4078 struct hci_sco_hdr *hdr = (void *) skb->data;
4079 struct hci_conn *conn;
4080 __u16 handle;
4081
4082 skb_pull(skb, HCI_SCO_HDR_SIZE);
4083
4084 handle = __le16_to_cpu(hdr->handle);
4085
4086 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4087
4088 hdev->stat.sco_rx++;
4089
4090 hci_dev_lock(hdev);
4091 conn = hci_conn_hash_lookup_handle(hdev, handle);
4092 hci_dev_unlock(hdev);
4093
4094 if (conn) {
4095 /* Send to upper protocol */
4096 sco_recv_scodata(conn, skb);
4097 return;
4098 } else {
4099 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4100 handle);
4101 }
4102
4103 kfree_skb(skb);
4104}
4105
4106static bool hci_req_is_complete(struct hci_dev *hdev)
4107{
4108 struct sk_buff *skb;
4109
4110 skb = skb_peek(&hdev->cmd_q);
4111 if (!skb)
4112 return true;
4113
4114 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4115}
4116
4117static void hci_resend_last(struct hci_dev *hdev)
4118{
4119 struct hci_command_hdr *sent;
4120 struct sk_buff *skb;
4121 u16 opcode;
4122
4123 if (!hdev->sent_cmd)
4124 return;
4125
4126 sent = (void *) hdev->sent_cmd->data;
4127 opcode = __le16_to_cpu(sent->opcode);
4128 if (opcode == HCI_OP_RESET)
4129 return;
4130
4131 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4132 if (!skb)
4133 return;
4134
4135 skb_queue_head(&hdev->cmd_q, skb);
4136 queue_work(hdev->workqueue, &hdev->cmd_work);
4137}
4138
4139void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4140 hci_req_complete_t *req_complete,
4141 hci_req_complete_skb_t *req_complete_skb)
4142{
4143 struct sk_buff *skb;
4144 unsigned long flags;
4145
4146 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4147
4148 /* If the completed command doesn't match the last one that was
4149 * sent we need to do special handling of it.
4150 */
4151 if (!hci_sent_cmd_data(hdev, opcode)) {
4152 /* Some CSR based controllers generate a spontaneous
4153 * reset complete event during init and any pending
4154 * command will never be completed. In such a case we
4155 * need to resend whatever was the last sent
4156 * command.
4157 */
4158 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4159 hci_resend_last(hdev);
4160
4161 return;
4162 }
4163
4164 /* If the command succeeded and there's still more commands in
4165 * this request the request is not yet complete.
4166 */
4167 if (!status && !hci_req_is_complete(hdev))
4168 return;
4169
4170 /* If this was the last command in a request the complete
4171 * callback would be found in hdev->sent_cmd instead of the
4172 * command queue (hdev->cmd_q).
4173 */
4174 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4175 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4176 return;
4177 }
4178
4179 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4180 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4181 return;
4182 }
4183
4184 /* Remove all pending commands belonging to this request */
4185 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4186 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4187 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4188 __skb_queue_head(&hdev->cmd_q, skb);
4189 break;
4190 }
4191
4192 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4193 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4194 else
4195 *req_complete = bt_cb(skb)->hci.req_complete;
4196 kfree_skb(skb);
4197 }
4198 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4199}
4200
4201static void hci_rx_work(struct work_struct *work)
4202{
4203 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4204 struct sk_buff *skb;
4205
4206 BT_DBG("%s", hdev->name);
4207
4208 while ((skb = skb_dequeue(&hdev->rx_q))) {
4209 /* Send copy to monitor */
4210 hci_send_to_monitor(hdev, skb);
4211
4212 if (atomic_read(&hdev->promisc)) {
4213 /* Send copy to the sockets */
4214 hci_send_to_sock(hdev, skb);
4215 }
4216
4217 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4218 kfree_skb(skb);
4219 continue;
4220 }
4221
4222 if (test_bit(HCI_INIT, &hdev->flags)) {
4223 /* Don't process data packets in this states. */
4224 switch (hci_skb_pkt_type(skb)) {
4225 case HCI_ACLDATA_PKT:
4226 case HCI_SCODATA_PKT:
4227 kfree_skb(skb);
4228 continue;
4229 }
4230 }
4231
4232 /* Process frame */
4233 switch (hci_skb_pkt_type(skb)) {
4234 case HCI_EVENT_PKT:
4235 BT_DBG("%s Event packet", hdev->name);
4236 hci_event_packet(hdev, skb);
4237 break;
4238
4239 case HCI_ACLDATA_PKT:
4240 BT_DBG("%s ACL data packet", hdev->name);
4241 hci_acldata_packet(hdev, skb);
4242 break;
4243
4244 case HCI_SCODATA_PKT:
4245 BT_DBG("%s SCO data packet", hdev->name);
4246 hci_scodata_packet(hdev, skb);
4247 break;
4248
4249 default:
4250 kfree_skb(skb);
4251 break;
4252 }
4253 }
4254}
4255
4256static void hci_cmd_work(struct work_struct *work)
4257{
4258 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4259 struct sk_buff *skb;
4260
4261 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4262 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4263
4264 /* Send queued commands */
4265 if (atomic_read(&hdev->cmd_cnt)) {
4266 skb = skb_dequeue(&hdev->cmd_q);
4267 if (!skb)
4268 return;
4269
4270 kfree_skb(hdev->sent_cmd);
4271
4272 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4273 if (hdev->sent_cmd) {
4274 atomic_dec(&hdev->cmd_cnt);
4275 hci_send_frame(hdev, skb);
4276 if (test_bit(HCI_RESET, &hdev->flags))
4277 cancel_delayed_work(&hdev->cmd_timer);
4278 else
4279 schedule_delayed_work(&hdev->cmd_timer,
4280 HCI_CMD_TIMEOUT);
4281 } else {
4282 skb_queue_head(&hdev->cmd_q, skb);
4283 queue_work(hdev->workqueue, &hdev->cmd_work);
4284 }
4285 }
4286}