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Merge tag 'mac80211-next-for-net-next-2020-03-20' of git://git.kernel.org/pub/scm...
[mirror_ubuntu-jammy-kernel.git] / net / bluetooth / hci_core.c
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI core. */
27
28 #include <linux/export.h>
29 #include <linux/idr.h>
30 #include <linux/rfkill.h>
31 #include <linux/debugfs.h>
32 #include <linux/crypto.h>
33 #include <linux/property.h>
34 #include <linux/suspend.h>
35 #include <linux/wait.h>
36 #include <asm/unaligned.h>
37
38 #include <net/bluetooth/bluetooth.h>
39 #include <net/bluetooth/hci_core.h>
40 #include <net/bluetooth/l2cap.h>
41 #include <net/bluetooth/mgmt.h>
42
43 #include "hci_request.h"
44 #include "hci_debugfs.h"
45 #include "smp.h"
46 #include "leds.h"
47
48 static void hci_rx_work(struct work_struct *work);
49 static void hci_cmd_work(struct work_struct *work);
50 static void hci_tx_work(struct work_struct *work);
51
52 /* HCI device list */
53 LIST_HEAD(hci_dev_list);
54 DEFINE_RWLOCK(hci_dev_list_lock);
55
56 /* HCI callback list */
57 LIST_HEAD(hci_cb_list);
58 DEFINE_MUTEX(hci_cb_list_lock);
59
60 /* HCI ID Numbering */
61 static DEFINE_IDA(hci_index_ida);
62
63 /* ---- HCI debugfs entries ---- */
64
65 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
66 size_t count, loff_t *ppos)
67 {
68 struct hci_dev *hdev = file->private_data;
69 char buf[3];
70
71 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
72 buf[1] = '\n';
73 buf[2] = '\0';
74 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
75 }
76
77 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
78 size_t count, loff_t *ppos)
79 {
80 struct hci_dev *hdev = file->private_data;
81 struct sk_buff *skb;
82 bool enable;
83 int err;
84
85 if (!test_bit(HCI_UP, &hdev->flags))
86 return -ENETDOWN;
87
88 err = kstrtobool_from_user(user_buf, count, &enable);
89 if (err)
90 return err;
91
92 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
93 return -EALREADY;
94
95 hci_req_sync_lock(hdev);
96 if (enable)
97 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
98 HCI_CMD_TIMEOUT);
99 else
100 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
101 HCI_CMD_TIMEOUT);
102 hci_req_sync_unlock(hdev);
103
104 if (IS_ERR(skb))
105 return PTR_ERR(skb);
106
107 kfree_skb(skb);
108
109 hci_dev_change_flag(hdev, HCI_DUT_MODE);
110
111 return count;
112 }
113
114 static const struct file_operations dut_mode_fops = {
115 .open = simple_open,
116 .read = dut_mode_read,
117 .write = dut_mode_write,
118 .llseek = default_llseek,
119 };
120
121 static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
122 size_t count, loff_t *ppos)
123 {
124 struct hci_dev *hdev = file->private_data;
125 char buf[3];
126
127 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
128 buf[1] = '\n';
129 buf[2] = '\0';
130 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
131 }
132
133 static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
134 size_t count, loff_t *ppos)
135 {
136 struct hci_dev *hdev = file->private_data;
137 bool enable;
138 int err;
139
140 err = kstrtobool_from_user(user_buf, count, &enable);
141 if (err)
142 return err;
143
144 /* When the diagnostic flags are not persistent and the transport
145 * is not active or in user channel operation, then there is no need
146 * for the vendor callback. Instead just store the desired value and
147 * the setting will be programmed when the controller gets powered on.
148 */
149 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
150 (!test_bit(HCI_RUNNING, &hdev->flags) ||
151 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
152 goto done;
153
154 hci_req_sync_lock(hdev);
155 err = hdev->set_diag(hdev, enable);
156 hci_req_sync_unlock(hdev);
157
158 if (err < 0)
159 return err;
160
161 done:
162 if (enable)
163 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
164 else
165 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
166
167 return count;
168 }
169
170 static const struct file_operations vendor_diag_fops = {
171 .open = simple_open,
172 .read = vendor_diag_read,
173 .write = vendor_diag_write,
174 .llseek = default_llseek,
175 };
176
177 static void hci_debugfs_create_basic(struct hci_dev *hdev)
178 {
179 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
180 &dut_mode_fops);
181
182 if (hdev->set_diag)
183 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
184 &vendor_diag_fops);
185 }
186
187 static int hci_reset_req(struct hci_request *req, unsigned long opt)
188 {
189 BT_DBG("%s %ld", req->hdev->name, opt);
190
191 /* Reset device */
192 set_bit(HCI_RESET, &req->hdev->flags);
193 hci_req_add(req, HCI_OP_RESET, 0, NULL);
194 return 0;
195 }
196
197 static void bredr_init(struct hci_request *req)
198 {
199 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
200
201 /* Read Local Supported Features */
202 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
203
204 /* Read Local Version */
205 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
206
207 /* Read BD Address */
208 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
209 }
210
211 static void amp_init1(struct hci_request *req)
212 {
213 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
214
215 /* Read Local Version */
216 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
217
218 /* Read Local Supported Commands */
219 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
220
221 /* Read Local AMP Info */
222 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
223
224 /* Read Data Blk size */
225 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
226
227 /* Read Flow Control Mode */
228 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
229
230 /* Read Location Data */
231 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
232 }
233
234 static int amp_init2(struct hci_request *req)
235 {
236 /* Read Local Supported Features. Not all AMP controllers
237 * support this so it's placed conditionally in the second
238 * stage init.
239 */
240 if (req->hdev->commands[14] & 0x20)
241 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
242
243 return 0;
244 }
245
246 static int hci_init1_req(struct hci_request *req, unsigned long opt)
247 {
248 struct hci_dev *hdev = req->hdev;
249
250 BT_DBG("%s %ld", hdev->name, opt);
251
252 /* Reset */
253 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
254 hci_reset_req(req, 0);
255
256 switch (hdev->dev_type) {
257 case HCI_PRIMARY:
258 bredr_init(req);
259 break;
260 case HCI_AMP:
261 amp_init1(req);
262 break;
263 default:
264 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
265 break;
266 }
267
268 return 0;
269 }
270
271 static void bredr_setup(struct hci_request *req)
272 {
273 __le16 param;
274 __u8 flt_type;
275
276 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
277 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
278
279 /* Read Class of Device */
280 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
281
282 /* Read Local Name */
283 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
284
285 /* Read Voice Setting */
286 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
287
288 /* Read Number of Supported IAC */
289 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
290
291 /* Read Current IAC LAP */
292 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
293
294 /* Clear Event Filters */
295 flt_type = HCI_FLT_CLEAR_ALL;
296 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
297
298 /* Connection accept timeout ~20 secs */
299 param = cpu_to_le16(0x7d00);
300 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
301 }
302
303 static void le_setup(struct hci_request *req)
304 {
305 struct hci_dev *hdev = req->hdev;
306
307 /* Read LE Buffer Size */
308 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
309
310 /* Read LE Local Supported Features */
311 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
312
313 /* Read LE Supported States */
314 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
315
316 /* LE-only controllers have LE implicitly enabled */
317 if (!lmp_bredr_capable(hdev))
318 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
319 }
320
321 static void hci_setup_event_mask(struct hci_request *req)
322 {
323 struct hci_dev *hdev = req->hdev;
324
325 /* The second byte is 0xff instead of 0x9f (two reserved bits
326 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
327 * command otherwise.
328 */
329 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
330
331 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
332 * any event mask for pre 1.2 devices.
333 */
334 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
335 return;
336
337 if (lmp_bredr_capable(hdev)) {
338 events[4] |= 0x01; /* Flow Specification Complete */
339 } else {
340 /* Use a different default for LE-only devices */
341 memset(events, 0, sizeof(events));
342 events[1] |= 0x20; /* Command Complete */
343 events[1] |= 0x40; /* Command Status */
344 events[1] |= 0x80; /* Hardware Error */
345
346 /* If the controller supports the Disconnect command, enable
347 * the corresponding event. In addition enable packet flow
348 * control related events.
349 */
350 if (hdev->commands[0] & 0x20) {
351 events[0] |= 0x10; /* Disconnection Complete */
352 events[2] |= 0x04; /* Number of Completed Packets */
353 events[3] |= 0x02; /* Data Buffer Overflow */
354 }
355
356 /* If the controller supports the Read Remote Version
357 * Information command, enable the corresponding event.
358 */
359 if (hdev->commands[2] & 0x80)
360 events[1] |= 0x08; /* Read Remote Version Information
361 * Complete
362 */
363
364 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
365 events[0] |= 0x80; /* Encryption Change */
366 events[5] |= 0x80; /* Encryption Key Refresh Complete */
367 }
368 }
369
370 if (lmp_inq_rssi_capable(hdev) ||
371 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
372 events[4] |= 0x02; /* Inquiry Result with RSSI */
373
374 if (lmp_ext_feat_capable(hdev))
375 events[4] |= 0x04; /* Read Remote Extended Features Complete */
376
377 if (lmp_esco_capable(hdev)) {
378 events[5] |= 0x08; /* Synchronous Connection Complete */
379 events[5] |= 0x10; /* Synchronous Connection Changed */
380 }
381
382 if (lmp_sniffsubr_capable(hdev))
383 events[5] |= 0x20; /* Sniff Subrating */
384
385 if (lmp_pause_enc_capable(hdev))
386 events[5] |= 0x80; /* Encryption Key Refresh Complete */
387
388 if (lmp_ext_inq_capable(hdev))
389 events[5] |= 0x40; /* Extended Inquiry Result */
390
391 if (lmp_no_flush_capable(hdev))
392 events[7] |= 0x01; /* Enhanced Flush Complete */
393
394 if (lmp_lsto_capable(hdev))
395 events[6] |= 0x80; /* Link Supervision Timeout Changed */
396
397 if (lmp_ssp_capable(hdev)) {
398 events[6] |= 0x01; /* IO Capability Request */
399 events[6] |= 0x02; /* IO Capability Response */
400 events[6] |= 0x04; /* User Confirmation Request */
401 events[6] |= 0x08; /* User Passkey Request */
402 events[6] |= 0x10; /* Remote OOB Data Request */
403 events[6] |= 0x20; /* Simple Pairing Complete */
404 events[7] |= 0x04; /* User Passkey Notification */
405 events[7] |= 0x08; /* Keypress Notification */
406 events[7] |= 0x10; /* Remote Host Supported
407 * Features Notification
408 */
409 }
410
411 if (lmp_le_capable(hdev))
412 events[7] |= 0x20; /* LE Meta-Event */
413
414 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
415 }
416
417 static int hci_init2_req(struct hci_request *req, unsigned long opt)
418 {
419 struct hci_dev *hdev = req->hdev;
420
421 if (hdev->dev_type == HCI_AMP)
422 return amp_init2(req);
423
424 if (lmp_bredr_capable(hdev))
425 bredr_setup(req);
426 else
427 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
428
429 if (lmp_le_capable(hdev))
430 le_setup(req);
431
432 /* All Bluetooth 1.2 and later controllers should support the
433 * HCI command for reading the local supported commands.
434 *
435 * Unfortunately some controllers indicate Bluetooth 1.2 support,
436 * but do not have support for this command. If that is the case,
437 * the driver can quirk the behavior and skip reading the local
438 * supported commands.
439 */
440 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
441 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
442 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
443
444 if (lmp_ssp_capable(hdev)) {
445 /* When SSP is available, then the host features page
446 * should also be available as well. However some
447 * controllers list the max_page as 0 as long as SSP
448 * has not been enabled. To achieve proper debugging
449 * output, force the minimum max_page to 1 at least.
450 */
451 hdev->max_page = 0x01;
452
453 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
454 u8 mode = 0x01;
455
456 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
457 sizeof(mode), &mode);
458 } else {
459 struct hci_cp_write_eir cp;
460
461 memset(hdev->eir, 0, sizeof(hdev->eir));
462 memset(&cp, 0, sizeof(cp));
463
464 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
465 }
466 }
467
468 if (lmp_inq_rssi_capable(hdev) ||
469 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
470 u8 mode;
471
472 /* If Extended Inquiry Result events are supported, then
473 * they are clearly preferred over Inquiry Result with RSSI
474 * events.
475 */
476 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
477
478 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
479 }
480
481 if (lmp_inq_tx_pwr_capable(hdev))
482 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
483
484 if (lmp_ext_feat_capable(hdev)) {
485 struct hci_cp_read_local_ext_features cp;
486
487 cp.page = 0x01;
488 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
489 sizeof(cp), &cp);
490 }
491
492 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
493 u8 enable = 1;
494 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
495 &enable);
496 }
497
498 return 0;
499 }
500
501 static void hci_setup_link_policy(struct hci_request *req)
502 {
503 struct hci_dev *hdev = req->hdev;
504 struct hci_cp_write_def_link_policy cp;
505 u16 link_policy = 0;
506
507 if (lmp_rswitch_capable(hdev))
508 link_policy |= HCI_LP_RSWITCH;
509 if (lmp_hold_capable(hdev))
510 link_policy |= HCI_LP_HOLD;
511 if (lmp_sniff_capable(hdev))
512 link_policy |= HCI_LP_SNIFF;
513 if (lmp_park_capable(hdev))
514 link_policy |= HCI_LP_PARK;
515
516 cp.policy = cpu_to_le16(link_policy);
517 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
518 }
519
520 static void hci_set_le_support(struct hci_request *req)
521 {
522 struct hci_dev *hdev = req->hdev;
523 struct hci_cp_write_le_host_supported cp;
524
525 /* LE-only devices do not support explicit enablement */
526 if (!lmp_bredr_capable(hdev))
527 return;
528
529 memset(&cp, 0, sizeof(cp));
530
531 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
532 cp.le = 0x01;
533 cp.simul = 0x00;
534 }
535
536 if (cp.le != lmp_host_le_capable(hdev))
537 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
538 &cp);
539 }
540
541 static void hci_set_event_mask_page_2(struct hci_request *req)
542 {
543 struct hci_dev *hdev = req->hdev;
544 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
545 bool changed = false;
546
547 /* If Connectionless Slave Broadcast master role is supported
548 * enable all necessary events for it.
549 */
550 if (lmp_csb_master_capable(hdev)) {
551 events[1] |= 0x40; /* Triggered Clock Capture */
552 events[1] |= 0x80; /* Synchronization Train Complete */
553 events[2] |= 0x10; /* Slave Page Response Timeout */
554 events[2] |= 0x20; /* CSB Channel Map Change */
555 changed = true;
556 }
557
558 /* If Connectionless Slave Broadcast slave role is supported
559 * enable all necessary events for it.
560 */
561 if (lmp_csb_slave_capable(hdev)) {
562 events[2] |= 0x01; /* Synchronization Train Received */
563 events[2] |= 0x02; /* CSB Receive */
564 events[2] |= 0x04; /* CSB Timeout */
565 events[2] |= 0x08; /* Truncated Page Complete */
566 changed = true;
567 }
568
569 /* Enable Authenticated Payload Timeout Expired event if supported */
570 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
571 events[2] |= 0x80;
572 changed = true;
573 }
574
575 /* Some Broadcom based controllers indicate support for Set Event
576 * Mask Page 2 command, but then actually do not support it. Since
577 * the default value is all bits set to zero, the command is only
578 * required if the event mask has to be changed. In case no change
579 * to the event mask is needed, skip this command.
580 */
581 if (changed)
582 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
583 sizeof(events), events);
584 }
585
586 static int hci_init3_req(struct hci_request *req, unsigned long opt)
587 {
588 struct hci_dev *hdev = req->hdev;
589 u8 p;
590
591 hci_setup_event_mask(req);
592
593 if (hdev->commands[6] & 0x20 &&
594 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
595 struct hci_cp_read_stored_link_key cp;
596
597 bacpy(&cp.bdaddr, BDADDR_ANY);
598 cp.read_all = 0x01;
599 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
600 }
601
602 if (hdev->commands[5] & 0x10)
603 hci_setup_link_policy(req);
604
605 if (hdev->commands[8] & 0x01)
606 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
607
608 if (hdev->commands[18] & 0x04)
609 hci_req_add(req, HCI_OP_READ_DEF_ERR_DATA_REPORTING, 0, NULL);
610
611 /* Some older Broadcom based Bluetooth 1.2 controllers do not
612 * support the Read Page Scan Type command. Check support for
613 * this command in the bit mask of supported commands.
614 */
615 if (hdev->commands[13] & 0x01)
616 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
617
618 if (lmp_le_capable(hdev)) {
619 u8 events[8];
620
621 memset(events, 0, sizeof(events));
622
623 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
624 events[0] |= 0x10; /* LE Long Term Key Request */
625
626 /* If controller supports the Connection Parameters Request
627 * Link Layer Procedure, enable the corresponding event.
628 */
629 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
630 events[0] |= 0x20; /* LE Remote Connection
631 * Parameter Request
632 */
633
634 /* If the controller supports the Data Length Extension
635 * feature, enable the corresponding event.
636 */
637 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
638 events[0] |= 0x40; /* LE Data Length Change */
639
640 /* If the controller supports Extended Scanner Filter
641 * Policies, enable the correspondig event.
642 */
643 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
644 events[1] |= 0x04; /* LE Direct Advertising
645 * Report
646 */
647
648 /* If the controller supports Channel Selection Algorithm #2
649 * feature, enable the corresponding event.
650 */
651 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
652 events[2] |= 0x08; /* LE Channel Selection
653 * Algorithm
654 */
655
656 /* If the controller supports the LE Set Scan Enable command,
657 * enable the corresponding advertising report event.
658 */
659 if (hdev->commands[26] & 0x08)
660 events[0] |= 0x02; /* LE Advertising Report */
661
662 /* If the controller supports the LE Create Connection
663 * command, enable the corresponding event.
664 */
665 if (hdev->commands[26] & 0x10)
666 events[0] |= 0x01; /* LE Connection Complete */
667
668 /* If the controller supports the LE Connection Update
669 * command, enable the corresponding event.
670 */
671 if (hdev->commands[27] & 0x04)
672 events[0] |= 0x04; /* LE Connection Update
673 * Complete
674 */
675
676 /* If the controller supports the LE Read Remote Used Features
677 * command, enable the corresponding event.
678 */
679 if (hdev->commands[27] & 0x20)
680 events[0] |= 0x08; /* LE Read Remote Used
681 * Features Complete
682 */
683
684 /* If the controller supports the LE Read Local P-256
685 * Public Key command, enable the corresponding event.
686 */
687 if (hdev->commands[34] & 0x02)
688 events[0] |= 0x80; /* LE Read Local P-256
689 * Public Key Complete
690 */
691
692 /* If the controller supports the LE Generate DHKey
693 * command, enable the corresponding event.
694 */
695 if (hdev->commands[34] & 0x04)
696 events[1] |= 0x01; /* LE Generate DHKey Complete */
697
698 /* If the controller supports the LE Set Default PHY or
699 * LE Set PHY commands, enable the corresponding event.
700 */
701 if (hdev->commands[35] & (0x20 | 0x40))
702 events[1] |= 0x08; /* LE PHY Update Complete */
703
704 /* If the controller supports LE Set Extended Scan Parameters
705 * and LE Set Extended Scan Enable commands, enable the
706 * corresponding event.
707 */
708 if (use_ext_scan(hdev))
709 events[1] |= 0x10; /* LE Extended Advertising
710 * Report
711 */
712
713 /* If the controller supports the LE Extended Create Connection
714 * command, enable the corresponding event.
715 */
716 if (use_ext_conn(hdev))
717 events[1] |= 0x02; /* LE Enhanced Connection
718 * Complete
719 */
720
721 /* If the controller supports the LE Extended Advertising
722 * command, enable the corresponding event.
723 */
724 if (ext_adv_capable(hdev))
725 events[2] |= 0x02; /* LE Advertising Set
726 * Terminated
727 */
728
729 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
730 events);
731
732 /* Read LE Advertising Channel TX Power */
733 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
734 /* HCI TS spec forbids mixing of legacy and extended
735 * advertising commands wherein READ_ADV_TX_POWER is
736 * also included. So do not call it if extended adv
737 * is supported otherwise controller will return
738 * COMMAND_DISALLOWED for extended commands.
739 */
740 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
741 }
742
743 if (hdev->commands[26] & 0x40) {
744 /* Read LE White List Size */
745 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
746 0, NULL);
747 }
748
749 if (hdev->commands[26] & 0x80) {
750 /* Clear LE White List */
751 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
752 }
753
754 if (hdev->commands[34] & 0x40) {
755 /* Read LE Resolving List Size */
756 hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
757 0, NULL);
758 }
759
760 if (hdev->commands[34] & 0x20) {
761 /* Clear LE Resolving List */
762 hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
763 }
764
765 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
766 /* Read LE Maximum Data Length */
767 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
768
769 /* Read LE Suggested Default Data Length */
770 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
771 }
772
773 if (ext_adv_capable(hdev)) {
774 /* Read LE Number of Supported Advertising Sets */
775 hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
776 0, NULL);
777 }
778
779 hci_set_le_support(req);
780 }
781
782 /* Read features beyond page 1 if available */
783 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
784 struct hci_cp_read_local_ext_features cp;
785
786 cp.page = p;
787 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
788 sizeof(cp), &cp);
789 }
790
791 return 0;
792 }
793
794 static int hci_init4_req(struct hci_request *req, unsigned long opt)
795 {
796 struct hci_dev *hdev = req->hdev;
797
798 /* Some Broadcom based Bluetooth controllers do not support the
799 * Delete Stored Link Key command. They are clearly indicating its
800 * absence in the bit mask of supported commands.
801 *
802 * Check the supported commands and only if the the command is marked
803 * as supported send it. If not supported assume that the controller
804 * does not have actual support for stored link keys which makes this
805 * command redundant anyway.
806 *
807 * Some controllers indicate that they support handling deleting
808 * stored link keys, but they don't. The quirk lets a driver
809 * just disable this command.
810 */
811 if (hdev->commands[6] & 0x80 &&
812 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
813 struct hci_cp_delete_stored_link_key cp;
814
815 bacpy(&cp.bdaddr, BDADDR_ANY);
816 cp.delete_all = 0x01;
817 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
818 sizeof(cp), &cp);
819 }
820
821 /* Set event mask page 2 if the HCI command for it is supported */
822 if (hdev->commands[22] & 0x04)
823 hci_set_event_mask_page_2(req);
824
825 /* Read local codec list if the HCI command is supported */
826 if (hdev->commands[29] & 0x20)
827 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
828
829 /* Get MWS transport configuration if the HCI command is supported */
830 if (hdev->commands[30] & 0x08)
831 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
832
833 /* Check for Synchronization Train support */
834 if (lmp_sync_train_capable(hdev))
835 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
836
837 /* Enable Secure Connections if supported and configured */
838 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
839 bredr_sc_enabled(hdev)) {
840 u8 support = 0x01;
841
842 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
843 sizeof(support), &support);
844 }
845
846 /* Set erroneous data reporting if supported to the wideband speech
847 * setting value
848 */
849 if (hdev->commands[18] & 0x08) {
850 bool enabled = hci_dev_test_flag(hdev,
851 HCI_WIDEBAND_SPEECH_ENABLED);
852
853 if (enabled !=
854 (hdev->err_data_reporting == ERR_DATA_REPORTING_ENABLED)) {
855 struct hci_cp_write_def_err_data_reporting cp;
856
857 cp.err_data_reporting = enabled ?
858 ERR_DATA_REPORTING_ENABLED :
859 ERR_DATA_REPORTING_DISABLED;
860
861 hci_req_add(req, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
862 sizeof(cp), &cp);
863 }
864 }
865
866 /* Set Suggested Default Data Length to maximum if supported */
867 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
868 struct hci_cp_le_write_def_data_len cp;
869
870 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
871 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
872 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
873 }
874
875 /* Set Default PHY parameters if command is supported */
876 if (hdev->commands[35] & 0x20) {
877 struct hci_cp_le_set_default_phy cp;
878
879 cp.all_phys = 0x00;
880 cp.tx_phys = hdev->le_tx_def_phys;
881 cp.rx_phys = hdev->le_rx_def_phys;
882
883 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
884 }
885
886 return 0;
887 }
888
889 static int __hci_init(struct hci_dev *hdev)
890 {
891 int err;
892
893 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
894 if (err < 0)
895 return err;
896
897 if (hci_dev_test_flag(hdev, HCI_SETUP))
898 hci_debugfs_create_basic(hdev);
899
900 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
901 if (err < 0)
902 return err;
903
904 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
905 * BR/EDR/LE type controllers. AMP controllers only need the
906 * first two stages of init.
907 */
908 if (hdev->dev_type != HCI_PRIMARY)
909 return 0;
910
911 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
912 if (err < 0)
913 return err;
914
915 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
916 if (err < 0)
917 return err;
918
919 /* This function is only called when the controller is actually in
920 * configured state. When the controller is marked as unconfigured,
921 * this initialization procedure is not run.
922 *
923 * It means that it is possible that a controller runs through its
924 * setup phase and then discovers missing settings. If that is the
925 * case, then this function will not be called. It then will only
926 * be called during the config phase.
927 *
928 * So only when in setup phase or config phase, create the debugfs
929 * entries and register the SMP channels.
930 */
931 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
932 !hci_dev_test_flag(hdev, HCI_CONFIG))
933 return 0;
934
935 hci_debugfs_create_common(hdev);
936
937 if (lmp_bredr_capable(hdev))
938 hci_debugfs_create_bredr(hdev);
939
940 if (lmp_le_capable(hdev))
941 hci_debugfs_create_le(hdev);
942
943 return 0;
944 }
945
946 static int hci_init0_req(struct hci_request *req, unsigned long opt)
947 {
948 struct hci_dev *hdev = req->hdev;
949
950 BT_DBG("%s %ld", hdev->name, opt);
951
952 /* Reset */
953 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
954 hci_reset_req(req, 0);
955
956 /* Read Local Version */
957 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
958
959 /* Read BD Address */
960 if (hdev->set_bdaddr)
961 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
962
963 return 0;
964 }
965
966 static int __hci_unconf_init(struct hci_dev *hdev)
967 {
968 int err;
969
970 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
971 return 0;
972
973 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
974 if (err < 0)
975 return err;
976
977 if (hci_dev_test_flag(hdev, HCI_SETUP))
978 hci_debugfs_create_basic(hdev);
979
980 return 0;
981 }
982
983 static int hci_scan_req(struct hci_request *req, unsigned long opt)
984 {
985 __u8 scan = opt;
986
987 BT_DBG("%s %x", req->hdev->name, scan);
988
989 /* Inquiry and Page scans */
990 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
991 return 0;
992 }
993
994 static int hci_auth_req(struct hci_request *req, unsigned long opt)
995 {
996 __u8 auth = opt;
997
998 BT_DBG("%s %x", req->hdev->name, auth);
999
1000 /* Authentication */
1001 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1002 return 0;
1003 }
1004
1005 static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
1006 {
1007 __u8 encrypt = opt;
1008
1009 BT_DBG("%s %x", req->hdev->name, encrypt);
1010
1011 /* Encryption */
1012 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1013 return 0;
1014 }
1015
1016 static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
1017 {
1018 __le16 policy = cpu_to_le16(opt);
1019
1020 BT_DBG("%s %x", req->hdev->name, policy);
1021
1022 /* Default link policy */
1023 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1024 return 0;
1025 }
1026
1027 /* Get HCI device by index.
1028 * Device is held on return. */
1029 struct hci_dev *hci_dev_get(int index)
1030 {
1031 struct hci_dev *hdev = NULL, *d;
1032
1033 BT_DBG("%d", index);
1034
1035 if (index < 0)
1036 return NULL;
1037
1038 read_lock(&hci_dev_list_lock);
1039 list_for_each_entry(d, &hci_dev_list, list) {
1040 if (d->id == index) {
1041 hdev = hci_dev_hold(d);
1042 break;
1043 }
1044 }
1045 read_unlock(&hci_dev_list_lock);
1046 return hdev;
1047 }
1048
1049 /* ---- Inquiry support ---- */
1050
1051 bool hci_discovery_active(struct hci_dev *hdev)
1052 {
1053 struct discovery_state *discov = &hdev->discovery;
1054
1055 switch (discov->state) {
1056 case DISCOVERY_FINDING:
1057 case DISCOVERY_RESOLVING:
1058 return true;
1059
1060 default:
1061 return false;
1062 }
1063 }
1064
1065 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1066 {
1067 int old_state = hdev->discovery.state;
1068
1069 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1070
1071 if (old_state == state)
1072 return;
1073
1074 hdev->discovery.state = state;
1075
1076 switch (state) {
1077 case DISCOVERY_STOPPED:
1078 hci_update_background_scan(hdev);
1079
1080 if (old_state != DISCOVERY_STARTING)
1081 mgmt_discovering(hdev, 0);
1082 break;
1083 case DISCOVERY_STARTING:
1084 break;
1085 case DISCOVERY_FINDING:
1086 mgmt_discovering(hdev, 1);
1087 break;
1088 case DISCOVERY_RESOLVING:
1089 break;
1090 case DISCOVERY_STOPPING:
1091 break;
1092 }
1093 }
1094
1095 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1096 {
1097 struct discovery_state *cache = &hdev->discovery;
1098 struct inquiry_entry *p, *n;
1099
1100 list_for_each_entry_safe(p, n, &cache->all, all) {
1101 list_del(&p->all);
1102 kfree(p);
1103 }
1104
1105 INIT_LIST_HEAD(&cache->unknown);
1106 INIT_LIST_HEAD(&cache->resolve);
1107 }
1108
1109 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1110 bdaddr_t *bdaddr)
1111 {
1112 struct discovery_state *cache = &hdev->discovery;
1113 struct inquiry_entry *e;
1114
1115 BT_DBG("cache %p, %pMR", cache, bdaddr);
1116
1117 list_for_each_entry(e, &cache->all, all) {
1118 if (!bacmp(&e->data.bdaddr, bdaddr))
1119 return e;
1120 }
1121
1122 return NULL;
1123 }
1124
1125 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1126 bdaddr_t *bdaddr)
1127 {
1128 struct discovery_state *cache = &hdev->discovery;
1129 struct inquiry_entry *e;
1130
1131 BT_DBG("cache %p, %pMR", cache, bdaddr);
1132
1133 list_for_each_entry(e, &cache->unknown, list) {
1134 if (!bacmp(&e->data.bdaddr, bdaddr))
1135 return e;
1136 }
1137
1138 return NULL;
1139 }
1140
1141 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1142 bdaddr_t *bdaddr,
1143 int state)
1144 {
1145 struct discovery_state *cache = &hdev->discovery;
1146 struct inquiry_entry *e;
1147
1148 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1149
1150 list_for_each_entry(e, &cache->resolve, list) {
1151 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1152 return e;
1153 if (!bacmp(&e->data.bdaddr, bdaddr))
1154 return e;
1155 }
1156
1157 return NULL;
1158 }
1159
1160 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1161 struct inquiry_entry *ie)
1162 {
1163 struct discovery_state *cache = &hdev->discovery;
1164 struct list_head *pos = &cache->resolve;
1165 struct inquiry_entry *p;
1166
1167 list_del(&ie->list);
1168
1169 list_for_each_entry(p, &cache->resolve, list) {
1170 if (p->name_state != NAME_PENDING &&
1171 abs(p->data.rssi) >= abs(ie->data.rssi))
1172 break;
1173 pos = &p->list;
1174 }
1175
1176 list_add(&ie->list, pos);
1177 }
1178
1179 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1180 bool name_known)
1181 {
1182 struct discovery_state *cache = &hdev->discovery;
1183 struct inquiry_entry *ie;
1184 u32 flags = 0;
1185
1186 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1187
1188 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1189
1190 if (!data->ssp_mode)
1191 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1192
1193 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1194 if (ie) {
1195 if (!ie->data.ssp_mode)
1196 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1197
1198 if (ie->name_state == NAME_NEEDED &&
1199 data->rssi != ie->data.rssi) {
1200 ie->data.rssi = data->rssi;
1201 hci_inquiry_cache_update_resolve(hdev, ie);
1202 }
1203
1204 goto update;
1205 }
1206
1207 /* Entry not in the cache. Add new one. */
1208 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1209 if (!ie) {
1210 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1211 goto done;
1212 }
1213
1214 list_add(&ie->all, &cache->all);
1215
1216 if (name_known) {
1217 ie->name_state = NAME_KNOWN;
1218 } else {
1219 ie->name_state = NAME_NOT_KNOWN;
1220 list_add(&ie->list, &cache->unknown);
1221 }
1222
1223 update:
1224 if (name_known && ie->name_state != NAME_KNOWN &&
1225 ie->name_state != NAME_PENDING) {
1226 ie->name_state = NAME_KNOWN;
1227 list_del(&ie->list);
1228 }
1229
1230 memcpy(&ie->data, data, sizeof(*data));
1231 ie->timestamp = jiffies;
1232 cache->timestamp = jiffies;
1233
1234 if (ie->name_state == NAME_NOT_KNOWN)
1235 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1236
1237 done:
1238 return flags;
1239 }
1240
1241 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1242 {
1243 struct discovery_state *cache = &hdev->discovery;
1244 struct inquiry_info *info = (struct inquiry_info *) buf;
1245 struct inquiry_entry *e;
1246 int copied = 0;
1247
1248 list_for_each_entry(e, &cache->all, all) {
1249 struct inquiry_data *data = &e->data;
1250
1251 if (copied >= num)
1252 break;
1253
1254 bacpy(&info->bdaddr, &data->bdaddr);
1255 info->pscan_rep_mode = data->pscan_rep_mode;
1256 info->pscan_period_mode = data->pscan_period_mode;
1257 info->pscan_mode = data->pscan_mode;
1258 memcpy(info->dev_class, data->dev_class, 3);
1259 info->clock_offset = data->clock_offset;
1260
1261 info++;
1262 copied++;
1263 }
1264
1265 BT_DBG("cache %p, copied %d", cache, copied);
1266 return copied;
1267 }
1268
1269 static int hci_inq_req(struct hci_request *req, unsigned long opt)
1270 {
1271 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1272 struct hci_dev *hdev = req->hdev;
1273 struct hci_cp_inquiry cp;
1274
1275 BT_DBG("%s", hdev->name);
1276
1277 if (test_bit(HCI_INQUIRY, &hdev->flags))
1278 return 0;
1279
1280 /* Start Inquiry */
1281 memcpy(&cp.lap, &ir->lap, 3);
1282 cp.length = ir->length;
1283 cp.num_rsp = ir->num_rsp;
1284 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1285
1286 return 0;
1287 }
1288
1289 int hci_inquiry(void __user *arg)
1290 {
1291 __u8 __user *ptr = arg;
1292 struct hci_inquiry_req ir;
1293 struct hci_dev *hdev;
1294 int err = 0, do_inquiry = 0, max_rsp;
1295 long timeo;
1296 __u8 *buf;
1297
1298 if (copy_from_user(&ir, ptr, sizeof(ir)))
1299 return -EFAULT;
1300
1301 hdev = hci_dev_get(ir.dev_id);
1302 if (!hdev)
1303 return -ENODEV;
1304
1305 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1306 err = -EBUSY;
1307 goto done;
1308 }
1309
1310 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1311 err = -EOPNOTSUPP;
1312 goto done;
1313 }
1314
1315 if (hdev->dev_type != HCI_PRIMARY) {
1316 err = -EOPNOTSUPP;
1317 goto done;
1318 }
1319
1320 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1321 err = -EOPNOTSUPP;
1322 goto done;
1323 }
1324
1325 hci_dev_lock(hdev);
1326 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1327 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1328 hci_inquiry_cache_flush(hdev);
1329 do_inquiry = 1;
1330 }
1331 hci_dev_unlock(hdev);
1332
1333 timeo = ir.length * msecs_to_jiffies(2000);
1334
1335 if (do_inquiry) {
1336 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1337 timeo, NULL);
1338 if (err < 0)
1339 goto done;
1340
1341 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1342 * cleared). If it is interrupted by a signal, return -EINTR.
1343 */
1344 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1345 TASK_INTERRUPTIBLE))
1346 return -EINTR;
1347 }
1348
1349 /* for unlimited number of responses we will use buffer with
1350 * 255 entries
1351 */
1352 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1353
1354 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1355 * copy it to the user space.
1356 */
1357 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1358 if (!buf) {
1359 err = -ENOMEM;
1360 goto done;
1361 }
1362
1363 hci_dev_lock(hdev);
1364 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1365 hci_dev_unlock(hdev);
1366
1367 BT_DBG("num_rsp %d", ir.num_rsp);
1368
1369 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1370 ptr += sizeof(ir);
1371 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1372 ir.num_rsp))
1373 err = -EFAULT;
1374 } else
1375 err = -EFAULT;
1376
1377 kfree(buf);
1378
1379 done:
1380 hci_dev_put(hdev);
1381 return err;
1382 }
1383
1384 /**
1385 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
1386 * (BD_ADDR) for a HCI device from
1387 * a firmware node property.
1388 * @hdev: The HCI device
1389 *
1390 * Search the firmware node for 'local-bd-address'.
1391 *
1392 * All-zero BD addresses are rejected, because those could be properties
1393 * that exist in the firmware tables, but were not updated by the firmware. For
1394 * example, the DTS could define 'local-bd-address', with zero BD addresses.
1395 */
1396 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
1397 {
1398 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
1399 bdaddr_t ba;
1400 int ret;
1401
1402 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
1403 (u8 *)&ba, sizeof(ba));
1404 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
1405 return;
1406
1407 bacpy(&hdev->public_addr, &ba);
1408 }
1409
1410 static int hci_dev_do_open(struct hci_dev *hdev)
1411 {
1412 int ret = 0;
1413
1414 BT_DBG("%s %p", hdev->name, hdev);
1415
1416 hci_req_sync_lock(hdev);
1417
1418 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1419 ret = -ENODEV;
1420 goto done;
1421 }
1422
1423 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1424 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1425 /* Check for rfkill but allow the HCI setup stage to
1426 * proceed (which in itself doesn't cause any RF activity).
1427 */
1428 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1429 ret = -ERFKILL;
1430 goto done;
1431 }
1432
1433 /* Check for valid public address or a configured static
1434 * random adddress, but let the HCI setup proceed to
1435 * be able to determine if there is a public address
1436 * or not.
1437 *
1438 * In case of user channel usage, it is not important
1439 * if a public address or static random address is
1440 * available.
1441 *
1442 * This check is only valid for BR/EDR controllers
1443 * since AMP controllers do not have an address.
1444 */
1445 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1446 hdev->dev_type == HCI_PRIMARY &&
1447 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1448 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1449 ret = -EADDRNOTAVAIL;
1450 goto done;
1451 }
1452 }
1453
1454 if (test_bit(HCI_UP, &hdev->flags)) {
1455 ret = -EALREADY;
1456 goto done;
1457 }
1458
1459 if (hdev->open(hdev)) {
1460 ret = -EIO;
1461 goto done;
1462 }
1463
1464 set_bit(HCI_RUNNING, &hdev->flags);
1465 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1466
1467 atomic_set(&hdev->cmd_cnt, 1);
1468 set_bit(HCI_INIT, &hdev->flags);
1469
1470 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1471 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1472 bool invalid_bdaddr;
1473
1474 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1475
1476 if (hdev->setup)
1477 ret = hdev->setup(hdev);
1478
1479 /* The transport driver can set the quirk to mark the
1480 * BD_ADDR invalid before creating the HCI device or in
1481 * its setup callback.
1482 */
1483 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
1484 &hdev->quirks);
1485
1486 if (ret)
1487 goto setup_failed;
1488
1489 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
1490 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
1491 hci_dev_get_bd_addr_from_property(hdev);
1492
1493 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1494 hdev->set_bdaddr) {
1495 ret = hdev->set_bdaddr(hdev,
1496 &hdev->public_addr);
1497
1498 /* If setting of the BD_ADDR from the device
1499 * property succeeds, then treat the address
1500 * as valid even if the invalid BD_ADDR
1501 * quirk indicates otherwise.
1502 */
1503 if (!ret)
1504 invalid_bdaddr = false;
1505 }
1506 }
1507
1508 setup_failed:
1509 /* The transport driver can set these quirks before
1510 * creating the HCI device or in its setup callback.
1511 *
1512 * For the invalid BD_ADDR quirk it is possible that
1513 * it becomes a valid address if the bootloader does
1514 * provide it (see above).
1515 *
1516 * In case any of them is set, the controller has to
1517 * start up as unconfigured.
1518 */
1519 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1520 invalid_bdaddr)
1521 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1522
1523 /* For an unconfigured controller it is required to
1524 * read at least the version information provided by
1525 * the Read Local Version Information command.
1526 *
1527 * If the set_bdaddr driver callback is provided, then
1528 * also the original Bluetooth public device address
1529 * will be read using the Read BD Address command.
1530 */
1531 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1532 ret = __hci_unconf_init(hdev);
1533 }
1534
1535 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1536 /* If public address change is configured, ensure that
1537 * the address gets programmed. If the driver does not
1538 * support changing the public address, fail the power
1539 * on procedure.
1540 */
1541 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1542 hdev->set_bdaddr)
1543 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1544 else
1545 ret = -EADDRNOTAVAIL;
1546 }
1547
1548 if (!ret) {
1549 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1550 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1551 ret = __hci_init(hdev);
1552 if (!ret && hdev->post_init)
1553 ret = hdev->post_init(hdev);
1554 }
1555 }
1556
1557 /* If the HCI Reset command is clearing all diagnostic settings,
1558 * then they need to be reprogrammed after the init procedure
1559 * completed.
1560 */
1561 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1562 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1563 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1564 ret = hdev->set_diag(hdev, true);
1565
1566 clear_bit(HCI_INIT, &hdev->flags);
1567
1568 if (!ret) {
1569 hci_dev_hold(hdev);
1570 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1571 hci_adv_instances_set_rpa_expired(hdev, true);
1572 set_bit(HCI_UP, &hdev->flags);
1573 hci_sock_dev_event(hdev, HCI_DEV_UP);
1574 hci_leds_update_powered(hdev, true);
1575 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1576 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1577 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1578 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1579 hci_dev_test_flag(hdev, HCI_MGMT) &&
1580 hdev->dev_type == HCI_PRIMARY) {
1581 ret = __hci_req_hci_power_on(hdev);
1582 mgmt_power_on(hdev, ret);
1583 }
1584 } else {
1585 /* Init failed, cleanup */
1586 flush_work(&hdev->tx_work);
1587 flush_work(&hdev->cmd_work);
1588 flush_work(&hdev->rx_work);
1589
1590 skb_queue_purge(&hdev->cmd_q);
1591 skb_queue_purge(&hdev->rx_q);
1592
1593 if (hdev->flush)
1594 hdev->flush(hdev);
1595
1596 if (hdev->sent_cmd) {
1597 kfree_skb(hdev->sent_cmd);
1598 hdev->sent_cmd = NULL;
1599 }
1600
1601 clear_bit(HCI_RUNNING, &hdev->flags);
1602 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1603
1604 hdev->close(hdev);
1605 hdev->flags &= BIT(HCI_RAW);
1606 }
1607
1608 done:
1609 hci_req_sync_unlock(hdev);
1610 return ret;
1611 }
1612
1613 /* ---- HCI ioctl helpers ---- */
1614
1615 int hci_dev_open(__u16 dev)
1616 {
1617 struct hci_dev *hdev;
1618 int err;
1619
1620 hdev = hci_dev_get(dev);
1621 if (!hdev)
1622 return -ENODEV;
1623
1624 /* Devices that are marked as unconfigured can only be powered
1625 * up as user channel. Trying to bring them up as normal devices
1626 * will result into a failure. Only user channel operation is
1627 * possible.
1628 *
1629 * When this function is called for a user channel, the flag
1630 * HCI_USER_CHANNEL will be set first before attempting to
1631 * open the device.
1632 */
1633 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1634 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1635 err = -EOPNOTSUPP;
1636 goto done;
1637 }
1638
1639 /* We need to ensure that no other power on/off work is pending
1640 * before proceeding to call hci_dev_do_open. This is
1641 * particularly important if the setup procedure has not yet
1642 * completed.
1643 */
1644 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1645 cancel_delayed_work(&hdev->power_off);
1646
1647 /* After this call it is guaranteed that the setup procedure
1648 * has finished. This means that error conditions like RFKILL
1649 * or no valid public or static random address apply.
1650 */
1651 flush_workqueue(hdev->req_workqueue);
1652
1653 /* For controllers not using the management interface and that
1654 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1655 * so that pairing works for them. Once the management interface
1656 * is in use this bit will be cleared again and userspace has
1657 * to explicitly enable it.
1658 */
1659 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1660 !hci_dev_test_flag(hdev, HCI_MGMT))
1661 hci_dev_set_flag(hdev, HCI_BONDABLE);
1662
1663 err = hci_dev_do_open(hdev);
1664
1665 done:
1666 hci_dev_put(hdev);
1667 return err;
1668 }
1669
1670 /* This function requires the caller holds hdev->lock */
1671 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1672 {
1673 struct hci_conn_params *p;
1674
1675 list_for_each_entry(p, &hdev->le_conn_params, list) {
1676 if (p->conn) {
1677 hci_conn_drop(p->conn);
1678 hci_conn_put(p->conn);
1679 p->conn = NULL;
1680 }
1681 list_del_init(&p->action);
1682 }
1683
1684 BT_DBG("All LE pending actions cleared");
1685 }
1686
1687 int hci_dev_do_close(struct hci_dev *hdev)
1688 {
1689 bool auto_off;
1690
1691 BT_DBG("%s %p", hdev->name, hdev);
1692
1693 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1694 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1695 test_bit(HCI_UP, &hdev->flags)) {
1696 /* Execute vendor specific shutdown routine */
1697 if (hdev->shutdown)
1698 hdev->shutdown(hdev);
1699 }
1700
1701 cancel_delayed_work(&hdev->power_off);
1702
1703 hci_request_cancel_all(hdev);
1704 hci_req_sync_lock(hdev);
1705
1706 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1707 cancel_delayed_work_sync(&hdev->cmd_timer);
1708 hci_req_sync_unlock(hdev);
1709 return 0;
1710 }
1711
1712 hci_leds_update_powered(hdev, false);
1713
1714 /* Flush RX and TX works */
1715 flush_work(&hdev->tx_work);
1716 flush_work(&hdev->rx_work);
1717
1718 if (hdev->discov_timeout > 0) {
1719 hdev->discov_timeout = 0;
1720 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1721 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1722 }
1723
1724 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1725 cancel_delayed_work(&hdev->service_cache);
1726
1727 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
1728 struct adv_info *adv_instance;
1729
1730 cancel_delayed_work_sync(&hdev->rpa_expired);
1731
1732 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
1733 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1734 }
1735
1736 /* Avoid potential lockdep warnings from the *_flush() calls by
1737 * ensuring the workqueue is empty up front.
1738 */
1739 drain_workqueue(hdev->workqueue);
1740
1741 hci_dev_lock(hdev);
1742
1743 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1744
1745 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1746
1747 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1748 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1749 hci_dev_test_flag(hdev, HCI_MGMT))
1750 __mgmt_power_off(hdev);
1751
1752 hci_inquiry_cache_flush(hdev);
1753 hci_pend_le_actions_clear(hdev);
1754 hci_conn_hash_flush(hdev);
1755 hci_dev_unlock(hdev);
1756
1757 smp_unregister(hdev);
1758
1759 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1760
1761 if (hdev->flush)
1762 hdev->flush(hdev);
1763
1764 /* Reset device */
1765 skb_queue_purge(&hdev->cmd_q);
1766 atomic_set(&hdev->cmd_cnt, 1);
1767 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1768 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1769 set_bit(HCI_INIT, &hdev->flags);
1770 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1771 clear_bit(HCI_INIT, &hdev->flags);
1772 }
1773
1774 /* flush cmd work */
1775 flush_work(&hdev->cmd_work);
1776
1777 /* Drop queues */
1778 skb_queue_purge(&hdev->rx_q);
1779 skb_queue_purge(&hdev->cmd_q);
1780 skb_queue_purge(&hdev->raw_q);
1781
1782 /* Drop last sent command */
1783 if (hdev->sent_cmd) {
1784 cancel_delayed_work_sync(&hdev->cmd_timer);
1785 kfree_skb(hdev->sent_cmd);
1786 hdev->sent_cmd = NULL;
1787 }
1788
1789 clear_bit(HCI_RUNNING, &hdev->flags);
1790 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1791
1792 if (test_and_clear_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks))
1793 wake_up(&hdev->suspend_wait_q);
1794
1795 /* After this point our queues are empty
1796 * and no tasks are scheduled. */
1797 hdev->close(hdev);
1798
1799 /* Clear flags */
1800 hdev->flags &= BIT(HCI_RAW);
1801 hci_dev_clear_volatile_flags(hdev);
1802
1803 /* Controller radio is available but is currently powered down */
1804 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1805
1806 memset(hdev->eir, 0, sizeof(hdev->eir));
1807 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1808 bacpy(&hdev->random_addr, BDADDR_ANY);
1809
1810 hci_req_sync_unlock(hdev);
1811
1812 hci_dev_put(hdev);
1813 return 0;
1814 }
1815
1816 int hci_dev_close(__u16 dev)
1817 {
1818 struct hci_dev *hdev;
1819 int err;
1820
1821 hdev = hci_dev_get(dev);
1822 if (!hdev)
1823 return -ENODEV;
1824
1825 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1826 err = -EBUSY;
1827 goto done;
1828 }
1829
1830 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1831 cancel_delayed_work(&hdev->power_off);
1832
1833 err = hci_dev_do_close(hdev);
1834
1835 done:
1836 hci_dev_put(hdev);
1837 return err;
1838 }
1839
1840 static int hci_dev_do_reset(struct hci_dev *hdev)
1841 {
1842 int ret;
1843
1844 BT_DBG("%s %p", hdev->name, hdev);
1845
1846 hci_req_sync_lock(hdev);
1847
1848 /* Drop queues */
1849 skb_queue_purge(&hdev->rx_q);
1850 skb_queue_purge(&hdev->cmd_q);
1851
1852 /* Avoid potential lockdep warnings from the *_flush() calls by
1853 * ensuring the workqueue is empty up front.
1854 */
1855 drain_workqueue(hdev->workqueue);
1856
1857 hci_dev_lock(hdev);
1858 hci_inquiry_cache_flush(hdev);
1859 hci_conn_hash_flush(hdev);
1860 hci_dev_unlock(hdev);
1861
1862 if (hdev->flush)
1863 hdev->flush(hdev);
1864
1865 atomic_set(&hdev->cmd_cnt, 1);
1866 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1867
1868 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1869
1870 hci_req_sync_unlock(hdev);
1871 return ret;
1872 }
1873
1874 int hci_dev_reset(__u16 dev)
1875 {
1876 struct hci_dev *hdev;
1877 int err;
1878
1879 hdev = hci_dev_get(dev);
1880 if (!hdev)
1881 return -ENODEV;
1882
1883 if (!test_bit(HCI_UP, &hdev->flags)) {
1884 err = -ENETDOWN;
1885 goto done;
1886 }
1887
1888 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1889 err = -EBUSY;
1890 goto done;
1891 }
1892
1893 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1894 err = -EOPNOTSUPP;
1895 goto done;
1896 }
1897
1898 err = hci_dev_do_reset(hdev);
1899
1900 done:
1901 hci_dev_put(hdev);
1902 return err;
1903 }
1904
1905 int hci_dev_reset_stat(__u16 dev)
1906 {
1907 struct hci_dev *hdev;
1908 int ret = 0;
1909
1910 hdev = hci_dev_get(dev);
1911 if (!hdev)
1912 return -ENODEV;
1913
1914 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1915 ret = -EBUSY;
1916 goto done;
1917 }
1918
1919 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1920 ret = -EOPNOTSUPP;
1921 goto done;
1922 }
1923
1924 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1925
1926 done:
1927 hci_dev_put(hdev);
1928 return ret;
1929 }
1930
1931 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1932 {
1933 bool conn_changed, discov_changed;
1934
1935 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1936
1937 if ((scan & SCAN_PAGE))
1938 conn_changed = !hci_dev_test_and_set_flag(hdev,
1939 HCI_CONNECTABLE);
1940 else
1941 conn_changed = hci_dev_test_and_clear_flag(hdev,
1942 HCI_CONNECTABLE);
1943
1944 if ((scan & SCAN_INQUIRY)) {
1945 discov_changed = !hci_dev_test_and_set_flag(hdev,
1946 HCI_DISCOVERABLE);
1947 } else {
1948 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1949 discov_changed = hci_dev_test_and_clear_flag(hdev,
1950 HCI_DISCOVERABLE);
1951 }
1952
1953 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1954 return;
1955
1956 if (conn_changed || discov_changed) {
1957 /* In case this was disabled through mgmt */
1958 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1959
1960 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1961 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1962
1963 mgmt_new_settings(hdev);
1964 }
1965 }
1966
1967 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1968 {
1969 struct hci_dev *hdev;
1970 struct hci_dev_req dr;
1971 int err = 0;
1972
1973 if (copy_from_user(&dr, arg, sizeof(dr)))
1974 return -EFAULT;
1975
1976 hdev = hci_dev_get(dr.dev_id);
1977 if (!hdev)
1978 return -ENODEV;
1979
1980 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1981 err = -EBUSY;
1982 goto done;
1983 }
1984
1985 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1986 err = -EOPNOTSUPP;
1987 goto done;
1988 }
1989
1990 if (hdev->dev_type != HCI_PRIMARY) {
1991 err = -EOPNOTSUPP;
1992 goto done;
1993 }
1994
1995 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1996 err = -EOPNOTSUPP;
1997 goto done;
1998 }
1999
2000 switch (cmd) {
2001 case HCISETAUTH:
2002 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2003 HCI_INIT_TIMEOUT, NULL);
2004 break;
2005
2006 case HCISETENCRYPT:
2007 if (!lmp_encrypt_capable(hdev)) {
2008 err = -EOPNOTSUPP;
2009 break;
2010 }
2011
2012 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2013 /* Auth must be enabled first */
2014 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2015 HCI_INIT_TIMEOUT, NULL);
2016 if (err)
2017 break;
2018 }
2019
2020 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2021 HCI_INIT_TIMEOUT, NULL);
2022 break;
2023
2024 case HCISETSCAN:
2025 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2026 HCI_INIT_TIMEOUT, NULL);
2027
2028 /* Ensure that the connectable and discoverable states
2029 * get correctly modified as this was a non-mgmt change.
2030 */
2031 if (!err)
2032 hci_update_scan_state(hdev, dr.dev_opt);
2033 break;
2034
2035 case HCISETLINKPOL:
2036 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2037 HCI_INIT_TIMEOUT, NULL);
2038 break;
2039
2040 case HCISETLINKMODE:
2041 hdev->link_mode = ((__u16) dr.dev_opt) &
2042 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2043 break;
2044
2045 case HCISETPTYPE:
2046 if (hdev->pkt_type == (__u16) dr.dev_opt)
2047 break;
2048
2049 hdev->pkt_type = (__u16) dr.dev_opt;
2050 mgmt_phy_configuration_changed(hdev, NULL);
2051 break;
2052
2053 case HCISETACLMTU:
2054 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2055 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2056 break;
2057
2058 case HCISETSCOMTU:
2059 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2060 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2061 break;
2062
2063 default:
2064 err = -EINVAL;
2065 break;
2066 }
2067
2068 done:
2069 hci_dev_put(hdev);
2070 return err;
2071 }
2072
2073 int hci_get_dev_list(void __user *arg)
2074 {
2075 struct hci_dev *hdev;
2076 struct hci_dev_list_req *dl;
2077 struct hci_dev_req *dr;
2078 int n = 0, size, err;
2079 __u16 dev_num;
2080
2081 if (get_user(dev_num, (__u16 __user *) arg))
2082 return -EFAULT;
2083
2084 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2085 return -EINVAL;
2086
2087 size = sizeof(*dl) + dev_num * sizeof(*dr);
2088
2089 dl = kzalloc(size, GFP_KERNEL);
2090 if (!dl)
2091 return -ENOMEM;
2092
2093 dr = dl->dev_req;
2094
2095 read_lock(&hci_dev_list_lock);
2096 list_for_each_entry(hdev, &hci_dev_list, list) {
2097 unsigned long flags = hdev->flags;
2098
2099 /* When the auto-off is configured it means the transport
2100 * is running, but in that case still indicate that the
2101 * device is actually down.
2102 */
2103 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2104 flags &= ~BIT(HCI_UP);
2105
2106 (dr + n)->dev_id = hdev->id;
2107 (dr + n)->dev_opt = flags;
2108
2109 if (++n >= dev_num)
2110 break;
2111 }
2112 read_unlock(&hci_dev_list_lock);
2113
2114 dl->dev_num = n;
2115 size = sizeof(*dl) + n * sizeof(*dr);
2116
2117 err = copy_to_user(arg, dl, size);
2118 kfree(dl);
2119
2120 return err ? -EFAULT : 0;
2121 }
2122
2123 int hci_get_dev_info(void __user *arg)
2124 {
2125 struct hci_dev *hdev;
2126 struct hci_dev_info di;
2127 unsigned long flags;
2128 int err = 0;
2129
2130 if (copy_from_user(&di, arg, sizeof(di)))
2131 return -EFAULT;
2132
2133 hdev = hci_dev_get(di.dev_id);
2134 if (!hdev)
2135 return -ENODEV;
2136
2137 /* When the auto-off is configured it means the transport
2138 * is running, but in that case still indicate that the
2139 * device is actually down.
2140 */
2141 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2142 flags = hdev->flags & ~BIT(HCI_UP);
2143 else
2144 flags = hdev->flags;
2145
2146 strcpy(di.name, hdev->name);
2147 di.bdaddr = hdev->bdaddr;
2148 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2149 di.flags = flags;
2150 di.pkt_type = hdev->pkt_type;
2151 if (lmp_bredr_capable(hdev)) {
2152 di.acl_mtu = hdev->acl_mtu;
2153 di.acl_pkts = hdev->acl_pkts;
2154 di.sco_mtu = hdev->sco_mtu;
2155 di.sco_pkts = hdev->sco_pkts;
2156 } else {
2157 di.acl_mtu = hdev->le_mtu;
2158 di.acl_pkts = hdev->le_pkts;
2159 di.sco_mtu = 0;
2160 di.sco_pkts = 0;
2161 }
2162 di.link_policy = hdev->link_policy;
2163 di.link_mode = hdev->link_mode;
2164
2165 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2166 memcpy(&di.features, &hdev->features, sizeof(di.features));
2167
2168 if (copy_to_user(arg, &di, sizeof(di)))
2169 err = -EFAULT;
2170
2171 hci_dev_put(hdev);
2172
2173 return err;
2174 }
2175
2176 /* ---- Interface to HCI drivers ---- */
2177
2178 static int hci_rfkill_set_block(void *data, bool blocked)
2179 {
2180 struct hci_dev *hdev = data;
2181
2182 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2183
2184 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2185 return -EBUSY;
2186
2187 if (blocked) {
2188 hci_dev_set_flag(hdev, HCI_RFKILLED);
2189 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2190 !hci_dev_test_flag(hdev, HCI_CONFIG))
2191 hci_dev_do_close(hdev);
2192 } else {
2193 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2194 }
2195
2196 return 0;
2197 }
2198
2199 static const struct rfkill_ops hci_rfkill_ops = {
2200 .set_block = hci_rfkill_set_block,
2201 };
2202
2203 static void hci_power_on(struct work_struct *work)
2204 {
2205 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2206 int err;
2207
2208 BT_DBG("%s", hdev->name);
2209
2210 if (test_bit(HCI_UP, &hdev->flags) &&
2211 hci_dev_test_flag(hdev, HCI_MGMT) &&
2212 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2213 cancel_delayed_work(&hdev->power_off);
2214 hci_req_sync_lock(hdev);
2215 err = __hci_req_hci_power_on(hdev);
2216 hci_req_sync_unlock(hdev);
2217 mgmt_power_on(hdev, err);
2218 return;
2219 }
2220
2221 err = hci_dev_do_open(hdev);
2222 if (err < 0) {
2223 hci_dev_lock(hdev);
2224 mgmt_set_powered_failed(hdev, err);
2225 hci_dev_unlock(hdev);
2226 return;
2227 }
2228
2229 /* During the HCI setup phase, a few error conditions are
2230 * ignored and they need to be checked now. If they are still
2231 * valid, it is important to turn the device back off.
2232 */
2233 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2234 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2235 (hdev->dev_type == HCI_PRIMARY &&
2236 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2237 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2238 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2239 hci_dev_do_close(hdev);
2240 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2241 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2242 HCI_AUTO_OFF_TIMEOUT);
2243 }
2244
2245 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2246 /* For unconfigured devices, set the HCI_RAW flag
2247 * so that userspace can easily identify them.
2248 */
2249 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2250 set_bit(HCI_RAW, &hdev->flags);
2251
2252 /* For fully configured devices, this will send
2253 * the Index Added event. For unconfigured devices,
2254 * it will send Unconfigued Index Added event.
2255 *
2256 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2257 * and no event will be send.
2258 */
2259 mgmt_index_added(hdev);
2260 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2261 /* When the controller is now configured, then it
2262 * is important to clear the HCI_RAW flag.
2263 */
2264 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2265 clear_bit(HCI_RAW, &hdev->flags);
2266
2267 /* Powering on the controller with HCI_CONFIG set only
2268 * happens with the transition from unconfigured to
2269 * configured. This will send the Index Added event.
2270 */
2271 mgmt_index_added(hdev);
2272 }
2273 }
2274
2275 static void hci_power_off(struct work_struct *work)
2276 {
2277 struct hci_dev *hdev = container_of(work, struct hci_dev,
2278 power_off.work);
2279
2280 BT_DBG("%s", hdev->name);
2281
2282 hci_dev_do_close(hdev);
2283 }
2284
2285 static void hci_error_reset(struct work_struct *work)
2286 {
2287 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2288
2289 BT_DBG("%s", hdev->name);
2290
2291 if (hdev->hw_error)
2292 hdev->hw_error(hdev, hdev->hw_error_code);
2293 else
2294 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2295
2296 if (hci_dev_do_close(hdev))
2297 return;
2298
2299 hci_dev_do_open(hdev);
2300 }
2301
2302 void hci_uuids_clear(struct hci_dev *hdev)
2303 {
2304 struct bt_uuid *uuid, *tmp;
2305
2306 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2307 list_del(&uuid->list);
2308 kfree(uuid);
2309 }
2310 }
2311
2312 void hci_link_keys_clear(struct hci_dev *hdev)
2313 {
2314 struct link_key *key;
2315
2316 list_for_each_entry(key, &hdev->link_keys, list) {
2317 list_del_rcu(&key->list);
2318 kfree_rcu(key, rcu);
2319 }
2320 }
2321
2322 void hci_smp_ltks_clear(struct hci_dev *hdev)
2323 {
2324 struct smp_ltk *k;
2325
2326 list_for_each_entry(k, &hdev->long_term_keys, list) {
2327 list_del_rcu(&k->list);
2328 kfree_rcu(k, rcu);
2329 }
2330 }
2331
2332 void hci_smp_irks_clear(struct hci_dev *hdev)
2333 {
2334 struct smp_irk *k;
2335
2336 list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
2337 list_del_rcu(&k->list);
2338 kfree_rcu(k, rcu);
2339 }
2340 }
2341
2342 void hci_blocked_keys_clear(struct hci_dev *hdev)
2343 {
2344 struct blocked_key *b;
2345
2346 list_for_each_entry(b, &hdev->blocked_keys, list) {
2347 list_del_rcu(&b->list);
2348 kfree_rcu(b, rcu);
2349 }
2350 }
2351
2352 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
2353 {
2354 bool blocked = false;
2355 struct blocked_key *b;
2356
2357 rcu_read_lock();
2358 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
2359 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
2360 blocked = true;
2361 break;
2362 }
2363 }
2364
2365 rcu_read_unlock();
2366 return blocked;
2367 }
2368
2369 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2370 {
2371 struct link_key *k;
2372
2373 rcu_read_lock();
2374 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2375 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2376 rcu_read_unlock();
2377
2378 if (hci_is_blocked_key(hdev,
2379 HCI_BLOCKED_KEY_TYPE_LINKKEY,
2380 k->val)) {
2381 bt_dev_warn_ratelimited(hdev,
2382 "Link key blocked for %pMR",
2383 &k->bdaddr);
2384 return NULL;
2385 }
2386
2387 return k;
2388 }
2389 }
2390 rcu_read_unlock();
2391
2392 return NULL;
2393 }
2394
2395 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2396 u8 key_type, u8 old_key_type)
2397 {
2398 /* Legacy key */
2399 if (key_type < 0x03)
2400 return true;
2401
2402 /* Debug keys are insecure so don't store them persistently */
2403 if (key_type == HCI_LK_DEBUG_COMBINATION)
2404 return false;
2405
2406 /* Changed combination key and there's no previous one */
2407 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2408 return false;
2409
2410 /* Security mode 3 case */
2411 if (!conn)
2412 return true;
2413
2414 /* BR/EDR key derived using SC from an LE link */
2415 if (conn->type == LE_LINK)
2416 return true;
2417
2418 /* Neither local nor remote side had no-bonding as requirement */
2419 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2420 return true;
2421
2422 /* Local side had dedicated bonding as requirement */
2423 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2424 return true;
2425
2426 /* Remote side had dedicated bonding as requirement */
2427 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2428 return true;
2429
2430 /* If none of the above criteria match, then don't store the key
2431 * persistently */
2432 return false;
2433 }
2434
2435 static u8 ltk_role(u8 type)
2436 {
2437 if (type == SMP_LTK)
2438 return HCI_ROLE_MASTER;
2439
2440 return HCI_ROLE_SLAVE;
2441 }
2442
2443 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2444 u8 addr_type, u8 role)
2445 {
2446 struct smp_ltk *k;
2447
2448 rcu_read_lock();
2449 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2450 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2451 continue;
2452
2453 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2454 rcu_read_unlock();
2455
2456 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
2457 k->val)) {
2458 bt_dev_warn_ratelimited(hdev,
2459 "LTK blocked for %pMR",
2460 &k->bdaddr);
2461 return NULL;
2462 }
2463
2464 return k;
2465 }
2466 }
2467 rcu_read_unlock();
2468
2469 return NULL;
2470 }
2471
2472 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2473 {
2474 struct smp_irk *irk_to_return = NULL;
2475 struct smp_irk *irk;
2476
2477 rcu_read_lock();
2478 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2479 if (!bacmp(&irk->rpa, rpa)) {
2480 irk_to_return = irk;
2481 goto done;
2482 }
2483 }
2484
2485 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2486 if (smp_irk_matches(hdev, irk->val, rpa)) {
2487 bacpy(&irk->rpa, rpa);
2488 irk_to_return = irk;
2489 goto done;
2490 }
2491 }
2492
2493 done:
2494 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2495 irk_to_return->val)) {
2496 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2497 &irk_to_return->bdaddr);
2498 irk_to_return = NULL;
2499 }
2500
2501 rcu_read_unlock();
2502
2503 return irk_to_return;
2504 }
2505
2506 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2507 u8 addr_type)
2508 {
2509 struct smp_irk *irk_to_return = NULL;
2510 struct smp_irk *irk;
2511
2512 /* Identity Address must be public or static random */
2513 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2514 return NULL;
2515
2516 rcu_read_lock();
2517 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2518 if (addr_type == irk->addr_type &&
2519 bacmp(bdaddr, &irk->bdaddr) == 0) {
2520 irk_to_return = irk;
2521 goto done;
2522 }
2523 }
2524
2525 done:
2526
2527 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2528 irk_to_return->val)) {
2529 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2530 &irk_to_return->bdaddr);
2531 irk_to_return = NULL;
2532 }
2533
2534 rcu_read_unlock();
2535
2536 return irk_to_return;
2537 }
2538
2539 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2540 bdaddr_t *bdaddr, u8 *val, u8 type,
2541 u8 pin_len, bool *persistent)
2542 {
2543 struct link_key *key, *old_key;
2544 u8 old_key_type;
2545
2546 old_key = hci_find_link_key(hdev, bdaddr);
2547 if (old_key) {
2548 old_key_type = old_key->type;
2549 key = old_key;
2550 } else {
2551 old_key_type = conn ? conn->key_type : 0xff;
2552 key = kzalloc(sizeof(*key), GFP_KERNEL);
2553 if (!key)
2554 return NULL;
2555 list_add_rcu(&key->list, &hdev->link_keys);
2556 }
2557
2558 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2559
2560 /* Some buggy controller combinations generate a changed
2561 * combination key for legacy pairing even when there's no
2562 * previous key */
2563 if (type == HCI_LK_CHANGED_COMBINATION &&
2564 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2565 type = HCI_LK_COMBINATION;
2566 if (conn)
2567 conn->key_type = type;
2568 }
2569
2570 bacpy(&key->bdaddr, bdaddr);
2571 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2572 key->pin_len = pin_len;
2573
2574 if (type == HCI_LK_CHANGED_COMBINATION)
2575 key->type = old_key_type;
2576 else
2577 key->type = type;
2578
2579 if (persistent)
2580 *persistent = hci_persistent_key(hdev, conn, type,
2581 old_key_type);
2582
2583 return key;
2584 }
2585
2586 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2587 u8 addr_type, u8 type, u8 authenticated,
2588 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2589 {
2590 struct smp_ltk *key, *old_key;
2591 u8 role = ltk_role(type);
2592
2593 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2594 if (old_key)
2595 key = old_key;
2596 else {
2597 key = kzalloc(sizeof(*key), GFP_KERNEL);
2598 if (!key)
2599 return NULL;
2600 list_add_rcu(&key->list, &hdev->long_term_keys);
2601 }
2602
2603 bacpy(&key->bdaddr, bdaddr);
2604 key->bdaddr_type = addr_type;
2605 memcpy(key->val, tk, sizeof(key->val));
2606 key->authenticated = authenticated;
2607 key->ediv = ediv;
2608 key->rand = rand;
2609 key->enc_size = enc_size;
2610 key->type = type;
2611
2612 return key;
2613 }
2614
2615 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2616 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2617 {
2618 struct smp_irk *irk;
2619
2620 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2621 if (!irk) {
2622 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2623 if (!irk)
2624 return NULL;
2625
2626 bacpy(&irk->bdaddr, bdaddr);
2627 irk->addr_type = addr_type;
2628
2629 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2630 }
2631
2632 memcpy(irk->val, val, 16);
2633 bacpy(&irk->rpa, rpa);
2634
2635 return irk;
2636 }
2637
2638 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2639 {
2640 struct link_key *key;
2641
2642 key = hci_find_link_key(hdev, bdaddr);
2643 if (!key)
2644 return -ENOENT;
2645
2646 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2647
2648 list_del_rcu(&key->list);
2649 kfree_rcu(key, rcu);
2650
2651 return 0;
2652 }
2653
2654 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2655 {
2656 struct smp_ltk *k;
2657 int removed = 0;
2658
2659 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2660 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2661 continue;
2662
2663 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2664
2665 list_del_rcu(&k->list);
2666 kfree_rcu(k, rcu);
2667 removed++;
2668 }
2669
2670 return removed ? 0 : -ENOENT;
2671 }
2672
2673 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2674 {
2675 struct smp_irk *k;
2676
2677 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2678 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2679 continue;
2680
2681 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2682
2683 list_del_rcu(&k->list);
2684 kfree_rcu(k, rcu);
2685 }
2686 }
2687
2688 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2689 {
2690 struct smp_ltk *k;
2691 struct smp_irk *irk;
2692 u8 addr_type;
2693
2694 if (type == BDADDR_BREDR) {
2695 if (hci_find_link_key(hdev, bdaddr))
2696 return true;
2697 return false;
2698 }
2699
2700 /* Convert to HCI addr type which struct smp_ltk uses */
2701 if (type == BDADDR_LE_PUBLIC)
2702 addr_type = ADDR_LE_DEV_PUBLIC;
2703 else
2704 addr_type = ADDR_LE_DEV_RANDOM;
2705
2706 irk = hci_get_irk(hdev, bdaddr, addr_type);
2707 if (irk) {
2708 bdaddr = &irk->bdaddr;
2709 addr_type = irk->addr_type;
2710 }
2711
2712 rcu_read_lock();
2713 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2714 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2715 rcu_read_unlock();
2716 return true;
2717 }
2718 }
2719 rcu_read_unlock();
2720
2721 return false;
2722 }
2723
2724 /* HCI command timer function */
2725 static void hci_cmd_timeout(struct work_struct *work)
2726 {
2727 struct hci_dev *hdev = container_of(work, struct hci_dev,
2728 cmd_timer.work);
2729
2730 if (hdev->sent_cmd) {
2731 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2732 u16 opcode = __le16_to_cpu(sent->opcode);
2733
2734 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2735 } else {
2736 bt_dev_err(hdev, "command tx timeout");
2737 }
2738
2739 if (hdev->cmd_timeout)
2740 hdev->cmd_timeout(hdev);
2741
2742 atomic_set(&hdev->cmd_cnt, 1);
2743 queue_work(hdev->workqueue, &hdev->cmd_work);
2744 }
2745
2746 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2747 bdaddr_t *bdaddr, u8 bdaddr_type)
2748 {
2749 struct oob_data *data;
2750
2751 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2752 if (bacmp(bdaddr, &data->bdaddr) != 0)
2753 continue;
2754 if (data->bdaddr_type != bdaddr_type)
2755 continue;
2756 return data;
2757 }
2758
2759 return NULL;
2760 }
2761
2762 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2763 u8 bdaddr_type)
2764 {
2765 struct oob_data *data;
2766
2767 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2768 if (!data)
2769 return -ENOENT;
2770
2771 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2772
2773 list_del(&data->list);
2774 kfree(data);
2775
2776 return 0;
2777 }
2778
2779 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2780 {
2781 struct oob_data *data, *n;
2782
2783 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2784 list_del(&data->list);
2785 kfree(data);
2786 }
2787 }
2788
2789 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2790 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2791 u8 *hash256, u8 *rand256)
2792 {
2793 struct oob_data *data;
2794
2795 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2796 if (!data) {
2797 data = kmalloc(sizeof(*data), GFP_KERNEL);
2798 if (!data)
2799 return -ENOMEM;
2800
2801 bacpy(&data->bdaddr, bdaddr);
2802 data->bdaddr_type = bdaddr_type;
2803 list_add(&data->list, &hdev->remote_oob_data);
2804 }
2805
2806 if (hash192 && rand192) {
2807 memcpy(data->hash192, hash192, sizeof(data->hash192));
2808 memcpy(data->rand192, rand192, sizeof(data->rand192));
2809 if (hash256 && rand256)
2810 data->present = 0x03;
2811 } else {
2812 memset(data->hash192, 0, sizeof(data->hash192));
2813 memset(data->rand192, 0, sizeof(data->rand192));
2814 if (hash256 && rand256)
2815 data->present = 0x02;
2816 else
2817 data->present = 0x00;
2818 }
2819
2820 if (hash256 && rand256) {
2821 memcpy(data->hash256, hash256, sizeof(data->hash256));
2822 memcpy(data->rand256, rand256, sizeof(data->rand256));
2823 } else {
2824 memset(data->hash256, 0, sizeof(data->hash256));
2825 memset(data->rand256, 0, sizeof(data->rand256));
2826 if (hash192 && rand192)
2827 data->present = 0x01;
2828 }
2829
2830 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2831
2832 return 0;
2833 }
2834
2835 /* This function requires the caller holds hdev->lock */
2836 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2837 {
2838 struct adv_info *adv_instance;
2839
2840 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2841 if (adv_instance->instance == instance)
2842 return adv_instance;
2843 }
2844
2845 return NULL;
2846 }
2847
2848 /* This function requires the caller holds hdev->lock */
2849 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2850 {
2851 struct adv_info *cur_instance;
2852
2853 cur_instance = hci_find_adv_instance(hdev, instance);
2854 if (!cur_instance)
2855 return NULL;
2856
2857 if (cur_instance == list_last_entry(&hdev->adv_instances,
2858 struct adv_info, list))
2859 return list_first_entry(&hdev->adv_instances,
2860 struct adv_info, list);
2861 else
2862 return list_next_entry(cur_instance, list);
2863 }
2864
2865 /* This function requires the caller holds hdev->lock */
2866 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2867 {
2868 struct adv_info *adv_instance;
2869
2870 adv_instance = hci_find_adv_instance(hdev, instance);
2871 if (!adv_instance)
2872 return -ENOENT;
2873
2874 BT_DBG("%s removing %dMR", hdev->name, instance);
2875
2876 if (hdev->cur_adv_instance == instance) {
2877 if (hdev->adv_instance_timeout) {
2878 cancel_delayed_work(&hdev->adv_instance_expire);
2879 hdev->adv_instance_timeout = 0;
2880 }
2881 hdev->cur_adv_instance = 0x00;
2882 }
2883
2884 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2885
2886 list_del(&adv_instance->list);
2887 kfree(adv_instance);
2888
2889 hdev->adv_instance_cnt--;
2890
2891 return 0;
2892 }
2893
2894 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
2895 {
2896 struct adv_info *adv_instance, *n;
2897
2898 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
2899 adv_instance->rpa_expired = rpa_expired;
2900 }
2901
2902 /* This function requires the caller holds hdev->lock */
2903 void hci_adv_instances_clear(struct hci_dev *hdev)
2904 {
2905 struct adv_info *adv_instance, *n;
2906
2907 if (hdev->adv_instance_timeout) {
2908 cancel_delayed_work(&hdev->adv_instance_expire);
2909 hdev->adv_instance_timeout = 0;
2910 }
2911
2912 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2913 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2914 list_del(&adv_instance->list);
2915 kfree(adv_instance);
2916 }
2917
2918 hdev->adv_instance_cnt = 0;
2919 hdev->cur_adv_instance = 0x00;
2920 }
2921
2922 static void adv_instance_rpa_expired(struct work_struct *work)
2923 {
2924 struct adv_info *adv_instance = container_of(work, struct adv_info,
2925 rpa_expired_cb.work);
2926
2927 BT_DBG("");
2928
2929 adv_instance->rpa_expired = true;
2930 }
2931
2932 /* This function requires the caller holds hdev->lock */
2933 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2934 u16 adv_data_len, u8 *adv_data,
2935 u16 scan_rsp_len, u8 *scan_rsp_data,
2936 u16 timeout, u16 duration)
2937 {
2938 struct adv_info *adv_instance;
2939
2940 adv_instance = hci_find_adv_instance(hdev, instance);
2941 if (adv_instance) {
2942 memset(adv_instance->adv_data, 0,
2943 sizeof(adv_instance->adv_data));
2944 memset(adv_instance->scan_rsp_data, 0,
2945 sizeof(adv_instance->scan_rsp_data));
2946 } else {
2947 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
2948 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2949 return -EOVERFLOW;
2950
2951 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2952 if (!adv_instance)
2953 return -ENOMEM;
2954
2955 adv_instance->pending = true;
2956 adv_instance->instance = instance;
2957 list_add(&adv_instance->list, &hdev->adv_instances);
2958 hdev->adv_instance_cnt++;
2959 }
2960
2961 adv_instance->flags = flags;
2962 adv_instance->adv_data_len = adv_data_len;
2963 adv_instance->scan_rsp_len = scan_rsp_len;
2964
2965 if (adv_data_len)
2966 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2967
2968 if (scan_rsp_len)
2969 memcpy(adv_instance->scan_rsp_data,
2970 scan_rsp_data, scan_rsp_len);
2971
2972 adv_instance->timeout = timeout;
2973 adv_instance->remaining_time = timeout;
2974
2975 if (duration == 0)
2976 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2977 else
2978 adv_instance->duration = duration;
2979
2980 adv_instance->tx_power = HCI_TX_POWER_INVALID;
2981
2982 INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
2983 adv_instance_rpa_expired);
2984
2985 BT_DBG("%s for %dMR", hdev->name, instance);
2986
2987 return 0;
2988 }
2989
2990 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2991 bdaddr_t *bdaddr, u8 type)
2992 {
2993 struct bdaddr_list *b;
2994
2995 list_for_each_entry(b, bdaddr_list, list) {
2996 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2997 return b;
2998 }
2999
3000 return NULL;
3001 }
3002
3003 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
3004 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
3005 u8 type)
3006 {
3007 struct bdaddr_list_with_irk *b;
3008
3009 list_for_each_entry(b, bdaddr_list, list) {
3010 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3011 return b;
3012 }
3013
3014 return NULL;
3015 }
3016
3017 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
3018 {
3019 struct bdaddr_list *b, *n;
3020
3021 list_for_each_entry_safe(b, n, bdaddr_list, list) {
3022 list_del(&b->list);
3023 kfree(b);
3024 }
3025 }
3026
3027 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3028 {
3029 struct bdaddr_list *entry;
3030
3031 if (!bacmp(bdaddr, BDADDR_ANY))
3032 return -EBADF;
3033
3034 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3035 return -EEXIST;
3036
3037 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3038 if (!entry)
3039 return -ENOMEM;
3040
3041 bacpy(&entry->bdaddr, bdaddr);
3042 entry->bdaddr_type = type;
3043
3044 list_add(&entry->list, list);
3045
3046 return 0;
3047 }
3048
3049 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3050 u8 type, u8 *peer_irk, u8 *local_irk)
3051 {
3052 struct bdaddr_list_with_irk *entry;
3053
3054 if (!bacmp(bdaddr, BDADDR_ANY))
3055 return -EBADF;
3056
3057 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3058 return -EEXIST;
3059
3060 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3061 if (!entry)
3062 return -ENOMEM;
3063
3064 bacpy(&entry->bdaddr, bdaddr);
3065 entry->bdaddr_type = type;
3066
3067 if (peer_irk)
3068 memcpy(entry->peer_irk, peer_irk, 16);
3069
3070 if (local_irk)
3071 memcpy(entry->local_irk, local_irk, 16);
3072
3073 list_add(&entry->list, list);
3074
3075 return 0;
3076 }
3077
3078 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3079 {
3080 struct bdaddr_list *entry;
3081
3082 if (!bacmp(bdaddr, BDADDR_ANY)) {
3083 hci_bdaddr_list_clear(list);
3084 return 0;
3085 }
3086
3087 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
3088 if (!entry)
3089 return -ENOENT;
3090
3091 list_del(&entry->list);
3092 kfree(entry);
3093
3094 return 0;
3095 }
3096
3097 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3098 u8 type)
3099 {
3100 struct bdaddr_list_with_irk *entry;
3101
3102 if (!bacmp(bdaddr, BDADDR_ANY)) {
3103 hci_bdaddr_list_clear(list);
3104 return 0;
3105 }
3106
3107 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
3108 if (!entry)
3109 return -ENOENT;
3110
3111 list_del(&entry->list);
3112 kfree(entry);
3113
3114 return 0;
3115 }
3116
3117 /* This function requires the caller holds hdev->lock */
3118 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3119 bdaddr_t *addr, u8 addr_type)
3120 {
3121 struct hci_conn_params *params;
3122
3123 list_for_each_entry(params, &hdev->le_conn_params, list) {
3124 if (bacmp(&params->addr, addr) == 0 &&
3125 params->addr_type == addr_type) {
3126 return params;
3127 }
3128 }
3129
3130 return NULL;
3131 }
3132
3133 /* This function requires the caller holds hdev->lock */
3134 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3135 bdaddr_t *addr, u8 addr_type)
3136 {
3137 struct hci_conn_params *param;
3138
3139 list_for_each_entry(param, list, action) {
3140 if (bacmp(&param->addr, addr) == 0 &&
3141 param->addr_type == addr_type)
3142 return param;
3143 }
3144
3145 return NULL;
3146 }
3147
3148 /* This function requires the caller holds hdev->lock */
3149 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3150 bdaddr_t *addr, u8 addr_type)
3151 {
3152 struct hci_conn_params *params;
3153
3154 params = hci_conn_params_lookup(hdev, addr, addr_type);
3155 if (params)
3156 return params;
3157
3158 params = kzalloc(sizeof(*params), GFP_KERNEL);
3159 if (!params) {
3160 bt_dev_err(hdev, "out of memory");
3161 return NULL;
3162 }
3163
3164 bacpy(&params->addr, addr);
3165 params->addr_type = addr_type;
3166
3167 list_add(&params->list, &hdev->le_conn_params);
3168 INIT_LIST_HEAD(&params->action);
3169
3170 params->conn_min_interval = hdev->le_conn_min_interval;
3171 params->conn_max_interval = hdev->le_conn_max_interval;
3172 params->conn_latency = hdev->le_conn_latency;
3173 params->supervision_timeout = hdev->le_supv_timeout;
3174 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3175
3176 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3177
3178 return params;
3179 }
3180
3181 static void hci_conn_params_free(struct hci_conn_params *params)
3182 {
3183 if (params->conn) {
3184 hci_conn_drop(params->conn);
3185 hci_conn_put(params->conn);
3186 }
3187
3188 list_del(&params->action);
3189 list_del(&params->list);
3190 kfree(params);
3191 }
3192
3193 /* This function requires the caller holds hdev->lock */
3194 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3195 {
3196 struct hci_conn_params *params;
3197
3198 params = hci_conn_params_lookup(hdev, addr, addr_type);
3199 if (!params)
3200 return;
3201
3202 hci_conn_params_free(params);
3203
3204 hci_update_background_scan(hdev);
3205
3206 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3207 }
3208
3209 /* This function requires the caller holds hdev->lock */
3210 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3211 {
3212 struct hci_conn_params *params, *tmp;
3213
3214 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3215 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3216 continue;
3217
3218 /* If trying to estabilish one time connection to disabled
3219 * device, leave the params, but mark them as just once.
3220 */
3221 if (params->explicit_connect) {
3222 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
3223 continue;
3224 }
3225
3226 list_del(&params->list);
3227 kfree(params);
3228 }
3229
3230 BT_DBG("All LE disabled connection parameters were removed");
3231 }
3232
3233 /* This function requires the caller holds hdev->lock */
3234 static void hci_conn_params_clear_all(struct hci_dev *hdev)
3235 {
3236 struct hci_conn_params *params, *tmp;
3237
3238 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3239 hci_conn_params_free(params);
3240
3241 BT_DBG("All LE connection parameters were removed");
3242 }
3243
3244 /* Copy the Identity Address of the controller.
3245 *
3246 * If the controller has a public BD_ADDR, then by default use that one.
3247 * If this is a LE only controller without a public address, default to
3248 * the static random address.
3249 *
3250 * For debugging purposes it is possible to force controllers with a
3251 * public address to use the static random address instead.
3252 *
3253 * In case BR/EDR has been disabled on a dual-mode controller and
3254 * userspace has configured a static address, then that address
3255 * becomes the identity address instead of the public BR/EDR address.
3256 */
3257 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3258 u8 *bdaddr_type)
3259 {
3260 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3261 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3262 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3263 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3264 bacpy(bdaddr, &hdev->static_addr);
3265 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3266 } else {
3267 bacpy(bdaddr, &hdev->bdaddr);
3268 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3269 }
3270 }
3271
3272 static int hci_suspend_wait_event(struct hci_dev *hdev)
3273 {
3274 #define WAKE_COND \
3275 (find_first_bit(hdev->suspend_tasks, __SUSPEND_NUM_TASKS) == \
3276 __SUSPEND_NUM_TASKS)
3277
3278 int i;
3279 int ret = wait_event_timeout(hdev->suspend_wait_q,
3280 WAKE_COND, SUSPEND_NOTIFIER_TIMEOUT);
3281
3282 if (ret == 0) {
3283 bt_dev_dbg(hdev, "Timed out waiting for suspend");
3284 for (i = 0; i < __SUSPEND_NUM_TASKS; ++i) {
3285 if (test_bit(i, hdev->suspend_tasks))
3286 bt_dev_dbg(hdev, "Bit %d is set", i);
3287 clear_bit(i, hdev->suspend_tasks);
3288 }
3289
3290 ret = -ETIMEDOUT;
3291 } else {
3292 ret = 0;
3293 }
3294
3295 return ret;
3296 }
3297
3298 static void hci_prepare_suspend(struct work_struct *work)
3299 {
3300 struct hci_dev *hdev =
3301 container_of(work, struct hci_dev, suspend_prepare);
3302
3303 hci_dev_lock(hdev);
3304 hci_req_prepare_suspend(hdev, hdev->suspend_state_next);
3305 hci_dev_unlock(hdev);
3306 }
3307
3308 static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
3309 void *data)
3310 {
3311 struct hci_dev *hdev =
3312 container_of(nb, struct hci_dev, suspend_notifier);
3313 int ret = 0;
3314
3315 /* If powering down, wait for completion. */
3316 if (mgmt_powering_down(hdev)) {
3317 set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks);
3318 ret = hci_suspend_wait_event(hdev);
3319 if (ret)
3320 goto done;
3321 }
3322
3323 /* Suspend notifier should only act on events when powered. */
3324 if (!hdev_is_powered(hdev))
3325 goto done;
3326
3327 if (action == PM_SUSPEND_PREPARE) {
3328 /* Suspend consists of two actions:
3329 * - First, disconnect everything and make the controller not
3330 * connectable (disabling scanning)
3331 * - Second, program event filter/whitelist and enable scan
3332 */
3333 hdev->suspend_state_next = BT_SUSPEND_DISCONNECT;
3334 set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
3335 queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
3336 ret = hci_suspend_wait_event(hdev);
3337
3338 /* If the disconnect portion failed, don't attempt to complete
3339 * by configuring the whitelist. The suspend notifier will
3340 * follow a cancelled suspend with a PM_POST_SUSPEND
3341 * notification.
3342 */
3343 if (!ret) {
3344 hdev->suspend_state_next = BT_SUSPEND_COMPLETE;
3345 set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
3346 queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
3347 ret = hci_suspend_wait_event(hdev);
3348 }
3349 } else if (action == PM_POST_SUSPEND) {
3350 hdev->suspend_state_next = BT_RUNNING;
3351 set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
3352 queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
3353 ret = hci_suspend_wait_event(hdev);
3354 }
3355
3356 done:
3357 return ret ? notifier_from_errno(-EBUSY) : NOTIFY_STOP;
3358 }
3359 /* Alloc HCI device */
3360 struct hci_dev *hci_alloc_dev(void)
3361 {
3362 struct hci_dev *hdev;
3363
3364 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3365 if (!hdev)
3366 return NULL;
3367
3368 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3369 hdev->esco_type = (ESCO_HV1);
3370 hdev->link_mode = (HCI_LM_ACCEPT);
3371 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3372 hdev->io_capability = 0x03; /* No Input No Output */
3373 hdev->manufacturer = 0xffff; /* Default to internal use */
3374 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3375 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3376 hdev->adv_instance_cnt = 0;
3377 hdev->cur_adv_instance = 0x00;
3378 hdev->adv_instance_timeout = 0;
3379
3380 hdev->sniff_max_interval = 800;
3381 hdev->sniff_min_interval = 80;
3382
3383 hdev->le_adv_channel_map = 0x07;
3384 hdev->le_adv_min_interval = 0x0800;
3385 hdev->le_adv_max_interval = 0x0800;
3386 hdev->le_scan_interval = 0x0060;
3387 hdev->le_scan_window = 0x0030;
3388 hdev->le_conn_min_interval = 0x0018;
3389 hdev->le_conn_max_interval = 0x0028;
3390 hdev->le_conn_latency = 0x0000;
3391 hdev->le_supv_timeout = 0x002a;
3392 hdev->le_def_tx_len = 0x001b;
3393 hdev->le_def_tx_time = 0x0148;
3394 hdev->le_max_tx_len = 0x001b;
3395 hdev->le_max_tx_time = 0x0148;
3396 hdev->le_max_rx_len = 0x001b;
3397 hdev->le_max_rx_time = 0x0148;
3398 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
3399 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3400 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
3401 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3402 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
3403
3404 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3405 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3406 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3407 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3408 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
3409 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
3410
3411 mutex_init(&hdev->lock);
3412 mutex_init(&hdev->req_lock);
3413
3414 INIT_LIST_HEAD(&hdev->mgmt_pending);
3415 INIT_LIST_HEAD(&hdev->blacklist);
3416 INIT_LIST_HEAD(&hdev->whitelist);
3417 INIT_LIST_HEAD(&hdev->wakeable);
3418 INIT_LIST_HEAD(&hdev->uuids);
3419 INIT_LIST_HEAD(&hdev->link_keys);
3420 INIT_LIST_HEAD(&hdev->long_term_keys);
3421 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3422 INIT_LIST_HEAD(&hdev->remote_oob_data);
3423 INIT_LIST_HEAD(&hdev->le_white_list);
3424 INIT_LIST_HEAD(&hdev->le_resolv_list);
3425 INIT_LIST_HEAD(&hdev->le_conn_params);
3426 INIT_LIST_HEAD(&hdev->pend_le_conns);
3427 INIT_LIST_HEAD(&hdev->pend_le_reports);
3428 INIT_LIST_HEAD(&hdev->conn_hash.list);
3429 INIT_LIST_HEAD(&hdev->adv_instances);
3430 INIT_LIST_HEAD(&hdev->blocked_keys);
3431
3432 INIT_WORK(&hdev->rx_work, hci_rx_work);
3433 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3434 INIT_WORK(&hdev->tx_work, hci_tx_work);
3435 INIT_WORK(&hdev->power_on, hci_power_on);
3436 INIT_WORK(&hdev->error_reset, hci_error_reset);
3437 INIT_WORK(&hdev->suspend_prepare, hci_prepare_suspend);
3438
3439 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3440
3441 skb_queue_head_init(&hdev->rx_q);
3442 skb_queue_head_init(&hdev->cmd_q);
3443 skb_queue_head_init(&hdev->raw_q);
3444
3445 init_waitqueue_head(&hdev->req_wait_q);
3446 init_waitqueue_head(&hdev->suspend_wait_q);
3447
3448 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3449
3450 hci_request_setup(hdev);
3451
3452 hci_init_sysfs(hdev);
3453 discovery_init(hdev);
3454
3455 return hdev;
3456 }
3457 EXPORT_SYMBOL(hci_alloc_dev);
3458
3459 /* Free HCI device */
3460 void hci_free_dev(struct hci_dev *hdev)
3461 {
3462 /* will free via device release */
3463 put_device(&hdev->dev);
3464 }
3465 EXPORT_SYMBOL(hci_free_dev);
3466
3467 /* Register HCI device */
3468 int hci_register_dev(struct hci_dev *hdev)
3469 {
3470 int id, error;
3471
3472 if (!hdev->open || !hdev->close || !hdev->send)
3473 return -EINVAL;
3474
3475 /* Do not allow HCI_AMP devices to register at index 0,
3476 * so the index can be used as the AMP controller ID.
3477 */
3478 switch (hdev->dev_type) {
3479 case HCI_PRIMARY:
3480 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3481 break;
3482 case HCI_AMP:
3483 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3484 break;
3485 default:
3486 return -EINVAL;
3487 }
3488
3489 if (id < 0)
3490 return id;
3491
3492 sprintf(hdev->name, "hci%d", id);
3493 hdev->id = id;
3494
3495 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3496
3497 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3498 if (!hdev->workqueue) {
3499 error = -ENOMEM;
3500 goto err;
3501 }
3502
3503 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3504 hdev->name);
3505 if (!hdev->req_workqueue) {
3506 destroy_workqueue(hdev->workqueue);
3507 error = -ENOMEM;
3508 goto err;
3509 }
3510
3511 if (!IS_ERR_OR_NULL(bt_debugfs))
3512 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3513
3514 dev_set_name(&hdev->dev, "%s", hdev->name);
3515
3516 error = device_add(&hdev->dev);
3517 if (error < 0)
3518 goto err_wqueue;
3519
3520 hci_leds_init(hdev);
3521
3522 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3523 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3524 hdev);
3525 if (hdev->rfkill) {
3526 if (rfkill_register(hdev->rfkill) < 0) {
3527 rfkill_destroy(hdev->rfkill);
3528 hdev->rfkill = NULL;
3529 }
3530 }
3531
3532 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3533 hci_dev_set_flag(hdev, HCI_RFKILLED);
3534
3535 hci_dev_set_flag(hdev, HCI_SETUP);
3536 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3537
3538 if (hdev->dev_type == HCI_PRIMARY) {
3539 /* Assume BR/EDR support until proven otherwise (such as
3540 * through reading supported features during init.
3541 */
3542 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3543 }
3544
3545 write_lock(&hci_dev_list_lock);
3546 list_add(&hdev->list, &hci_dev_list);
3547 write_unlock(&hci_dev_list_lock);
3548
3549 /* Devices that are marked for raw-only usage are unconfigured
3550 * and should not be included in normal operation.
3551 */
3552 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3553 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3554
3555 hci_sock_dev_event(hdev, HCI_DEV_REG);
3556 hci_dev_hold(hdev);
3557
3558 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
3559 error = register_pm_notifier(&hdev->suspend_notifier);
3560 if (error)
3561 goto err_wqueue;
3562
3563 queue_work(hdev->req_workqueue, &hdev->power_on);
3564
3565 return id;
3566
3567 err_wqueue:
3568 destroy_workqueue(hdev->workqueue);
3569 destroy_workqueue(hdev->req_workqueue);
3570 err:
3571 ida_simple_remove(&hci_index_ida, hdev->id);
3572
3573 return error;
3574 }
3575 EXPORT_SYMBOL(hci_register_dev);
3576
3577 /* Unregister HCI device */
3578 void hci_unregister_dev(struct hci_dev *hdev)
3579 {
3580 int id;
3581
3582 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3583
3584 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3585
3586 id = hdev->id;
3587
3588 write_lock(&hci_dev_list_lock);
3589 list_del(&hdev->list);
3590 write_unlock(&hci_dev_list_lock);
3591
3592 cancel_work_sync(&hdev->power_on);
3593
3594 hci_dev_do_close(hdev);
3595
3596 unregister_pm_notifier(&hdev->suspend_notifier);
3597
3598 if (!test_bit(HCI_INIT, &hdev->flags) &&
3599 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3600 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3601 hci_dev_lock(hdev);
3602 mgmt_index_removed(hdev);
3603 hci_dev_unlock(hdev);
3604 }
3605
3606 /* mgmt_index_removed should take care of emptying the
3607 * pending list */
3608 BUG_ON(!list_empty(&hdev->mgmt_pending));
3609
3610 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3611
3612 if (hdev->rfkill) {
3613 rfkill_unregister(hdev->rfkill);
3614 rfkill_destroy(hdev->rfkill);
3615 }
3616
3617 device_del(&hdev->dev);
3618
3619 debugfs_remove_recursive(hdev->debugfs);
3620 kfree_const(hdev->hw_info);
3621 kfree_const(hdev->fw_info);
3622
3623 destroy_workqueue(hdev->workqueue);
3624 destroy_workqueue(hdev->req_workqueue);
3625
3626 hci_dev_lock(hdev);
3627 hci_bdaddr_list_clear(&hdev->blacklist);
3628 hci_bdaddr_list_clear(&hdev->whitelist);
3629 hci_uuids_clear(hdev);
3630 hci_link_keys_clear(hdev);
3631 hci_smp_ltks_clear(hdev);
3632 hci_smp_irks_clear(hdev);
3633 hci_remote_oob_data_clear(hdev);
3634 hci_adv_instances_clear(hdev);
3635 hci_bdaddr_list_clear(&hdev->le_white_list);
3636 hci_bdaddr_list_clear(&hdev->le_resolv_list);
3637 hci_conn_params_clear_all(hdev);
3638 hci_discovery_filter_clear(hdev);
3639 hci_blocked_keys_clear(hdev);
3640 hci_dev_unlock(hdev);
3641
3642 hci_dev_put(hdev);
3643
3644 ida_simple_remove(&hci_index_ida, id);
3645 }
3646 EXPORT_SYMBOL(hci_unregister_dev);
3647
3648 /* Suspend HCI device */
3649 int hci_suspend_dev(struct hci_dev *hdev)
3650 {
3651 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3652 return 0;
3653 }
3654 EXPORT_SYMBOL(hci_suspend_dev);
3655
3656 /* Resume HCI device */
3657 int hci_resume_dev(struct hci_dev *hdev)
3658 {
3659 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3660 return 0;
3661 }
3662 EXPORT_SYMBOL(hci_resume_dev);
3663
3664 /* Reset HCI device */
3665 int hci_reset_dev(struct hci_dev *hdev)
3666 {
3667 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3668 struct sk_buff *skb;
3669
3670 skb = bt_skb_alloc(3, GFP_ATOMIC);
3671 if (!skb)
3672 return -ENOMEM;
3673
3674 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3675 skb_put_data(skb, hw_err, 3);
3676
3677 /* Send Hardware Error to upper stack */
3678 return hci_recv_frame(hdev, skb);
3679 }
3680 EXPORT_SYMBOL(hci_reset_dev);
3681
3682 /* Receive frame from HCI drivers */
3683 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3684 {
3685 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3686 && !test_bit(HCI_INIT, &hdev->flags))) {
3687 kfree_skb(skb);
3688 return -ENXIO;
3689 }
3690
3691 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3692 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3693 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
3694 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
3695 kfree_skb(skb);
3696 return -EINVAL;
3697 }
3698
3699 /* Incoming skb */
3700 bt_cb(skb)->incoming = 1;
3701
3702 /* Time stamp */
3703 __net_timestamp(skb);
3704
3705 skb_queue_tail(&hdev->rx_q, skb);
3706 queue_work(hdev->workqueue, &hdev->rx_work);
3707
3708 return 0;
3709 }
3710 EXPORT_SYMBOL(hci_recv_frame);
3711
3712 /* Receive diagnostic message from HCI drivers */
3713 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3714 {
3715 /* Mark as diagnostic packet */
3716 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3717
3718 /* Time stamp */
3719 __net_timestamp(skb);
3720
3721 skb_queue_tail(&hdev->rx_q, skb);
3722 queue_work(hdev->workqueue, &hdev->rx_work);
3723
3724 return 0;
3725 }
3726 EXPORT_SYMBOL(hci_recv_diag);
3727
3728 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3729 {
3730 va_list vargs;
3731
3732 va_start(vargs, fmt);
3733 kfree_const(hdev->hw_info);
3734 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3735 va_end(vargs);
3736 }
3737 EXPORT_SYMBOL(hci_set_hw_info);
3738
3739 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3740 {
3741 va_list vargs;
3742
3743 va_start(vargs, fmt);
3744 kfree_const(hdev->fw_info);
3745 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3746 va_end(vargs);
3747 }
3748 EXPORT_SYMBOL(hci_set_fw_info);
3749
3750 /* ---- Interface to upper protocols ---- */
3751
3752 int hci_register_cb(struct hci_cb *cb)
3753 {
3754 BT_DBG("%p name %s", cb, cb->name);
3755
3756 mutex_lock(&hci_cb_list_lock);
3757 list_add_tail(&cb->list, &hci_cb_list);
3758 mutex_unlock(&hci_cb_list_lock);
3759
3760 return 0;
3761 }
3762 EXPORT_SYMBOL(hci_register_cb);
3763
3764 int hci_unregister_cb(struct hci_cb *cb)
3765 {
3766 BT_DBG("%p name %s", cb, cb->name);
3767
3768 mutex_lock(&hci_cb_list_lock);
3769 list_del(&cb->list);
3770 mutex_unlock(&hci_cb_list_lock);
3771
3772 return 0;
3773 }
3774 EXPORT_SYMBOL(hci_unregister_cb);
3775
3776 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3777 {
3778 int err;
3779
3780 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3781 skb->len);
3782
3783 /* Time stamp */
3784 __net_timestamp(skb);
3785
3786 /* Send copy to monitor */
3787 hci_send_to_monitor(hdev, skb);
3788
3789 if (atomic_read(&hdev->promisc)) {
3790 /* Send copy to the sockets */
3791 hci_send_to_sock(hdev, skb);
3792 }
3793
3794 /* Get rid of skb owner, prior to sending to the driver. */
3795 skb_orphan(skb);
3796
3797 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3798 kfree_skb(skb);
3799 return;
3800 }
3801
3802 err = hdev->send(hdev, skb);
3803 if (err < 0) {
3804 bt_dev_err(hdev, "sending frame failed (%d)", err);
3805 kfree_skb(skb);
3806 }
3807 }
3808
3809 /* Send HCI command */
3810 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3811 const void *param)
3812 {
3813 struct sk_buff *skb;
3814
3815 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3816
3817 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3818 if (!skb) {
3819 bt_dev_err(hdev, "no memory for command");
3820 return -ENOMEM;
3821 }
3822
3823 /* Stand-alone HCI commands must be flagged as
3824 * single-command requests.
3825 */
3826 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3827
3828 skb_queue_tail(&hdev->cmd_q, skb);
3829 queue_work(hdev->workqueue, &hdev->cmd_work);
3830
3831 return 0;
3832 }
3833
3834 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3835 const void *param)
3836 {
3837 struct sk_buff *skb;
3838
3839 if (hci_opcode_ogf(opcode) != 0x3f) {
3840 /* A controller receiving a command shall respond with either
3841 * a Command Status Event or a Command Complete Event.
3842 * Therefore, all standard HCI commands must be sent via the
3843 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3844 * Some vendors do not comply with this rule for vendor-specific
3845 * commands and do not return any event. We want to support
3846 * unresponded commands for such cases only.
3847 */
3848 bt_dev_err(hdev, "unresponded command not supported");
3849 return -EINVAL;
3850 }
3851
3852 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3853 if (!skb) {
3854 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3855 opcode);
3856 return -ENOMEM;
3857 }
3858
3859 hci_send_frame(hdev, skb);
3860
3861 return 0;
3862 }
3863 EXPORT_SYMBOL(__hci_cmd_send);
3864
3865 /* Get data from the previously sent command */
3866 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3867 {
3868 struct hci_command_hdr *hdr;
3869
3870 if (!hdev->sent_cmd)
3871 return NULL;
3872
3873 hdr = (void *) hdev->sent_cmd->data;
3874
3875 if (hdr->opcode != cpu_to_le16(opcode))
3876 return NULL;
3877
3878 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3879
3880 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3881 }
3882
3883 /* Send HCI command and wait for command commplete event */
3884 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3885 const void *param, u32 timeout)
3886 {
3887 struct sk_buff *skb;
3888
3889 if (!test_bit(HCI_UP, &hdev->flags))
3890 return ERR_PTR(-ENETDOWN);
3891
3892 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3893
3894 hci_req_sync_lock(hdev);
3895 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3896 hci_req_sync_unlock(hdev);
3897
3898 return skb;
3899 }
3900 EXPORT_SYMBOL(hci_cmd_sync);
3901
3902 /* Send ACL data */
3903 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3904 {
3905 struct hci_acl_hdr *hdr;
3906 int len = skb->len;
3907
3908 skb_push(skb, HCI_ACL_HDR_SIZE);
3909 skb_reset_transport_header(skb);
3910 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3911 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3912 hdr->dlen = cpu_to_le16(len);
3913 }
3914
3915 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3916 struct sk_buff *skb, __u16 flags)
3917 {
3918 struct hci_conn *conn = chan->conn;
3919 struct hci_dev *hdev = conn->hdev;
3920 struct sk_buff *list;
3921
3922 skb->len = skb_headlen(skb);
3923 skb->data_len = 0;
3924
3925 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3926
3927 switch (hdev->dev_type) {
3928 case HCI_PRIMARY:
3929 hci_add_acl_hdr(skb, conn->handle, flags);
3930 break;
3931 case HCI_AMP:
3932 hci_add_acl_hdr(skb, chan->handle, flags);
3933 break;
3934 default:
3935 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3936 return;
3937 }
3938
3939 list = skb_shinfo(skb)->frag_list;
3940 if (!list) {
3941 /* Non fragmented */
3942 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3943
3944 skb_queue_tail(queue, skb);
3945 } else {
3946 /* Fragmented */
3947 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3948
3949 skb_shinfo(skb)->frag_list = NULL;
3950
3951 /* Queue all fragments atomically. We need to use spin_lock_bh
3952 * here because of 6LoWPAN links, as there this function is
3953 * called from softirq and using normal spin lock could cause
3954 * deadlocks.
3955 */
3956 spin_lock_bh(&queue->lock);
3957
3958 __skb_queue_tail(queue, skb);
3959
3960 flags &= ~ACL_START;
3961 flags |= ACL_CONT;
3962 do {
3963 skb = list; list = list->next;
3964
3965 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3966 hci_add_acl_hdr(skb, conn->handle, flags);
3967
3968 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3969
3970 __skb_queue_tail(queue, skb);
3971 } while (list);
3972
3973 spin_unlock_bh(&queue->lock);
3974 }
3975 }
3976
3977 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3978 {
3979 struct hci_dev *hdev = chan->conn->hdev;
3980
3981 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3982
3983 hci_queue_acl(chan, &chan->data_q, skb, flags);
3984
3985 queue_work(hdev->workqueue, &hdev->tx_work);
3986 }
3987
3988 /* Send SCO data */
3989 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3990 {
3991 struct hci_dev *hdev = conn->hdev;
3992 struct hci_sco_hdr hdr;
3993
3994 BT_DBG("%s len %d", hdev->name, skb->len);
3995
3996 hdr.handle = cpu_to_le16(conn->handle);
3997 hdr.dlen = skb->len;
3998
3999 skb_push(skb, HCI_SCO_HDR_SIZE);
4000 skb_reset_transport_header(skb);
4001 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
4002
4003 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
4004
4005 skb_queue_tail(&conn->data_q, skb);
4006 queue_work(hdev->workqueue, &hdev->tx_work);
4007 }
4008
4009 /* ---- HCI TX task (outgoing data) ---- */
4010
4011 /* HCI Connection scheduler */
4012 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4013 int *quote)
4014 {
4015 struct hci_conn_hash *h = &hdev->conn_hash;
4016 struct hci_conn *conn = NULL, *c;
4017 unsigned int num = 0, min = ~0;
4018
4019 /* We don't have to lock device here. Connections are always
4020 * added and removed with TX task disabled. */
4021
4022 rcu_read_lock();
4023
4024 list_for_each_entry_rcu(c, &h->list, list) {
4025 if (c->type != type || skb_queue_empty(&c->data_q))
4026 continue;
4027
4028 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4029 continue;
4030
4031 num++;
4032
4033 if (c->sent < min) {
4034 min = c->sent;
4035 conn = c;
4036 }
4037
4038 if (hci_conn_num(hdev, type) == num)
4039 break;
4040 }
4041
4042 rcu_read_unlock();
4043
4044 if (conn) {
4045 int cnt, q;
4046
4047 switch (conn->type) {
4048 case ACL_LINK:
4049 cnt = hdev->acl_cnt;
4050 break;
4051 case SCO_LINK:
4052 case ESCO_LINK:
4053 cnt = hdev->sco_cnt;
4054 break;
4055 case LE_LINK:
4056 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4057 break;
4058 default:
4059 cnt = 0;
4060 bt_dev_err(hdev, "unknown link type %d", conn->type);
4061 }
4062
4063 q = cnt / num;
4064 *quote = q ? q : 1;
4065 } else
4066 *quote = 0;
4067
4068 BT_DBG("conn %p quote %d", conn, *quote);
4069 return conn;
4070 }
4071
4072 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
4073 {
4074 struct hci_conn_hash *h = &hdev->conn_hash;
4075 struct hci_conn *c;
4076
4077 bt_dev_err(hdev, "link tx timeout");
4078
4079 rcu_read_lock();
4080
4081 /* Kill stalled connections */
4082 list_for_each_entry_rcu(c, &h->list, list) {
4083 if (c->type == type && c->sent) {
4084 bt_dev_err(hdev, "killing stalled connection %pMR",
4085 &c->dst);
4086 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
4087 }
4088 }
4089
4090 rcu_read_unlock();
4091 }
4092
4093 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4094 int *quote)
4095 {
4096 struct hci_conn_hash *h = &hdev->conn_hash;
4097 struct hci_chan *chan = NULL;
4098 unsigned int num = 0, min = ~0, cur_prio = 0;
4099 struct hci_conn *conn;
4100 int cnt, q, conn_num = 0;
4101
4102 BT_DBG("%s", hdev->name);
4103
4104 rcu_read_lock();
4105
4106 list_for_each_entry_rcu(conn, &h->list, list) {
4107 struct hci_chan *tmp;
4108
4109 if (conn->type != type)
4110 continue;
4111
4112 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4113 continue;
4114
4115 conn_num++;
4116
4117 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
4118 struct sk_buff *skb;
4119
4120 if (skb_queue_empty(&tmp->data_q))
4121 continue;
4122
4123 skb = skb_peek(&tmp->data_q);
4124 if (skb->priority < cur_prio)
4125 continue;
4126
4127 if (skb->priority > cur_prio) {
4128 num = 0;
4129 min = ~0;
4130 cur_prio = skb->priority;
4131 }
4132
4133 num++;
4134
4135 if (conn->sent < min) {
4136 min = conn->sent;
4137 chan = tmp;
4138 }
4139 }
4140
4141 if (hci_conn_num(hdev, type) == conn_num)
4142 break;
4143 }
4144
4145 rcu_read_unlock();
4146
4147 if (!chan)
4148 return NULL;
4149
4150 switch (chan->conn->type) {
4151 case ACL_LINK:
4152 cnt = hdev->acl_cnt;
4153 break;
4154 case AMP_LINK:
4155 cnt = hdev->block_cnt;
4156 break;
4157 case SCO_LINK:
4158 case ESCO_LINK:
4159 cnt = hdev->sco_cnt;
4160 break;
4161 case LE_LINK:
4162 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4163 break;
4164 default:
4165 cnt = 0;
4166 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
4167 }
4168
4169 q = cnt / num;
4170 *quote = q ? q : 1;
4171 BT_DBG("chan %p quote %d", chan, *quote);
4172 return chan;
4173 }
4174
4175 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4176 {
4177 struct hci_conn_hash *h = &hdev->conn_hash;
4178 struct hci_conn *conn;
4179 int num = 0;
4180
4181 BT_DBG("%s", hdev->name);
4182
4183 rcu_read_lock();
4184
4185 list_for_each_entry_rcu(conn, &h->list, list) {
4186 struct hci_chan *chan;
4187
4188 if (conn->type != type)
4189 continue;
4190
4191 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4192 continue;
4193
4194 num++;
4195
4196 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4197 struct sk_buff *skb;
4198
4199 if (chan->sent) {
4200 chan->sent = 0;
4201 continue;
4202 }
4203
4204 if (skb_queue_empty(&chan->data_q))
4205 continue;
4206
4207 skb = skb_peek(&chan->data_q);
4208 if (skb->priority >= HCI_PRIO_MAX - 1)
4209 continue;
4210
4211 skb->priority = HCI_PRIO_MAX - 1;
4212
4213 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
4214 skb->priority);
4215 }
4216
4217 if (hci_conn_num(hdev, type) == num)
4218 break;
4219 }
4220
4221 rcu_read_unlock();
4222
4223 }
4224
4225 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4226 {
4227 /* Calculate count of blocks used by this packet */
4228 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4229 }
4230
4231 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4232 {
4233 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4234 /* ACL tx timeout must be longer than maximum
4235 * link supervision timeout (40.9 seconds) */
4236 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4237 HCI_ACL_TX_TIMEOUT))
4238 hci_link_tx_to(hdev, ACL_LINK);
4239 }
4240 }
4241
4242 static void hci_sched_acl_pkt(struct hci_dev *hdev)
4243 {
4244 unsigned int cnt = hdev->acl_cnt;
4245 struct hci_chan *chan;
4246 struct sk_buff *skb;
4247 int quote;
4248
4249 __check_timeout(hdev, cnt);
4250
4251 while (hdev->acl_cnt &&
4252 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
4253 u32 priority = (skb_peek(&chan->data_q))->priority;
4254 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4255 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4256 skb->len, skb->priority);
4257
4258 /* Stop if priority has changed */
4259 if (skb->priority < priority)
4260 break;
4261
4262 skb = skb_dequeue(&chan->data_q);
4263
4264 hci_conn_enter_active_mode(chan->conn,
4265 bt_cb(skb)->force_active);
4266
4267 hci_send_frame(hdev, skb);
4268 hdev->acl_last_tx = jiffies;
4269
4270 hdev->acl_cnt--;
4271 chan->sent++;
4272 chan->conn->sent++;
4273 }
4274 }
4275
4276 if (cnt != hdev->acl_cnt)
4277 hci_prio_recalculate(hdev, ACL_LINK);
4278 }
4279
4280 static void hci_sched_acl_blk(struct hci_dev *hdev)
4281 {
4282 unsigned int cnt = hdev->block_cnt;
4283 struct hci_chan *chan;
4284 struct sk_buff *skb;
4285 int quote;
4286 u8 type;
4287
4288 __check_timeout(hdev, cnt);
4289
4290 BT_DBG("%s", hdev->name);
4291
4292 if (hdev->dev_type == HCI_AMP)
4293 type = AMP_LINK;
4294 else
4295 type = ACL_LINK;
4296
4297 while (hdev->block_cnt > 0 &&
4298 (chan = hci_chan_sent(hdev, type, &quote))) {
4299 u32 priority = (skb_peek(&chan->data_q))->priority;
4300 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4301 int blocks;
4302
4303 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4304 skb->len, skb->priority);
4305
4306 /* Stop if priority has changed */
4307 if (skb->priority < priority)
4308 break;
4309
4310 skb = skb_dequeue(&chan->data_q);
4311
4312 blocks = __get_blocks(hdev, skb);
4313 if (blocks > hdev->block_cnt)
4314 return;
4315
4316 hci_conn_enter_active_mode(chan->conn,
4317 bt_cb(skb)->force_active);
4318
4319 hci_send_frame(hdev, skb);
4320 hdev->acl_last_tx = jiffies;
4321
4322 hdev->block_cnt -= blocks;
4323 quote -= blocks;
4324
4325 chan->sent += blocks;
4326 chan->conn->sent += blocks;
4327 }
4328 }
4329
4330 if (cnt != hdev->block_cnt)
4331 hci_prio_recalculate(hdev, type);
4332 }
4333
4334 static void hci_sched_acl(struct hci_dev *hdev)
4335 {
4336 BT_DBG("%s", hdev->name);
4337
4338 /* No ACL link over BR/EDR controller */
4339 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4340 return;
4341
4342 /* No AMP link over AMP controller */
4343 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4344 return;
4345
4346 switch (hdev->flow_ctl_mode) {
4347 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4348 hci_sched_acl_pkt(hdev);
4349 break;
4350
4351 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4352 hci_sched_acl_blk(hdev);
4353 break;
4354 }
4355 }
4356
4357 /* Schedule SCO */
4358 static void hci_sched_sco(struct hci_dev *hdev)
4359 {
4360 struct hci_conn *conn;
4361 struct sk_buff *skb;
4362 int quote;
4363
4364 BT_DBG("%s", hdev->name);
4365
4366 if (!hci_conn_num(hdev, SCO_LINK))
4367 return;
4368
4369 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
4370 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4371 BT_DBG("skb %p len %d", skb, skb->len);
4372 hci_send_frame(hdev, skb);
4373
4374 conn->sent++;
4375 if (conn->sent == ~0)
4376 conn->sent = 0;
4377 }
4378 }
4379 }
4380
4381 static void hci_sched_esco(struct hci_dev *hdev)
4382 {
4383 struct hci_conn *conn;
4384 struct sk_buff *skb;
4385 int quote;
4386
4387 BT_DBG("%s", hdev->name);
4388
4389 if (!hci_conn_num(hdev, ESCO_LINK))
4390 return;
4391
4392 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4393 &quote))) {
4394 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4395 BT_DBG("skb %p len %d", skb, skb->len);
4396 hci_send_frame(hdev, skb);
4397
4398 conn->sent++;
4399 if (conn->sent == ~0)
4400 conn->sent = 0;
4401 }
4402 }
4403 }
4404
4405 static void hci_sched_le(struct hci_dev *hdev)
4406 {
4407 struct hci_chan *chan;
4408 struct sk_buff *skb;
4409 int quote, cnt, tmp;
4410
4411 BT_DBG("%s", hdev->name);
4412
4413 if (!hci_conn_num(hdev, LE_LINK))
4414 return;
4415
4416 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4417
4418 __check_timeout(hdev, cnt);
4419
4420 tmp = cnt;
4421 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
4422 u32 priority = (skb_peek(&chan->data_q))->priority;
4423 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4424 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4425 skb->len, skb->priority);
4426
4427 /* Stop if priority has changed */
4428 if (skb->priority < priority)
4429 break;
4430
4431 skb = skb_dequeue(&chan->data_q);
4432
4433 hci_send_frame(hdev, skb);
4434 hdev->le_last_tx = jiffies;
4435
4436 cnt--;
4437 chan->sent++;
4438 chan->conn->sent++;
4439 }
4440 }
4441
4442 if (hdev->le_pkts)
4443 hdev->le_cnt = cnt;
4444 else
4445 hdev->acl_cnt = cnt;
4446
4447 if (cnt != tmp)
4448 hci_prio_recalculate(hdev, LE_LINK);
4449 }
4450
4451 static void hci_tx_work(struct work_struct *work)
4452 {
4453 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4454 struct sk_buff *skb;
4455
4456 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4457 hdev->sco_cnt, hdev->le_cnt);
4458
4459 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4460 /* Schedule queues and send stuff to HCI driver */
4461 hci_sched_acl(hdev);
4462 hci_sched_sco(hdev);
4463 hci_sched_esco(hdev);
4464 hci_sched_le(hdev);
4465 }
4466
4467 /* Send next queued raw (unknown type) packet */
4468 while ((skb = skb_dequeue(&hdev->raw_q)))
4469 hci_send_frame(hdev, skb);
4470 }
4471
4472 /* ----- HCI RX task (incoming data processing) ----- */
4473
4474 /* ACL data packet */
4475 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4476 {
4477 struct hci_acl_hdr *hdr = (void *) skb->data;
4478 struct hci_conn *conn;
4479 __u16 handle, flags;
4480
4481 skb_pull(skb, HCI_ACL_HDR_SIZE);
4482
4483 handle = __le16_to_cpu(hdr->handle);
4484 flags = hci_flags(handle);
4485 handle = hci_handle(handle);
4486
4487 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4488 handle, flags);
4489
4490 hdev->stat.acl_rx++;
4491
4492 hci_dev_lock(hdev);
4493 conn = hci_conn_hash_lookup_handle(hdev, handle);
4494 hci_dev_unlock(hdev);
4495
4496 if (conn) {
4497 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4498
4499 /* Send to upper protocol */
4500 l2cap_recv_acldata(conn, skb, flags);
4501 return;
4502 } else {
4503 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4504 handle);
4505 }
4506
4507 kfree_skb(skb);
4508 }
4509
4510 /* SCO data packet */
4511 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4512 {
4513 struct hci_sco_hdr *hdr = (void *) skb->data;
4514 struct hci_conn *conn;
4515 __u16 handle, flags;
4516
4517 skb_pull(skb, HCI_SCO_HDR_SIZE);
4518
4519 handle = __le16_to_cpu(hdr->handle);
4520 flags = hci_flags(handle);
4521 handle = hci_handle(handle);
4522
4523 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4524 handle, flags);
4525
4526 hdev->stat.sco_rx++;
4527
4528 hci_dev_lock(hdev);
4529 conn = hci_conn_hash_lookup_handle(hdev, handle);
4530 hci_dev_unlock(hdev);
4531
4532 if (conn) {
4533 /* Send to upper protocol */
4534 sco_recv_scodata(conn, skb);
4535 return;
4536 } else {
4537 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4538 handle);
4539 }
4540
4541 kfree_skb(skb);
4542 }
4543
4544 static bool hci_req_is_complete(struct hci_dev *hdev)
4545 {
4546 struct sk_buff *skb;
4547
4548 skb = skb_peek(&hdev->cmd_q);
4549 if (!skb)
4550 return true;
4551
4552 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4553 }
4554
4555 static void hci_resend_last(struct hci_dev *hdev)
4556 {
4557 struct hci_command_hdr *sent;
4558 struct sk_buff *skb;
4559 u16 opcode;
4560
4561 if (!hdev->sent_cmd)
4562 return;
4563
4564 sent = (void *) hdev->sent_cmd->data;
4565 opcode = __le16_to_cpu(sent->opcode);
4566 if (opcode == HCI_OP_RESET)
4567 return;
4568
4569 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4570 if (!skb)
4571 return;
4572
4573 skb_queue_head(&hdev->cmd_q, skb);
4574 queue_work(hdev->workqueue, &hdev->cmd_work);
4575 }
4576
4577 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4578 hci_req_complete_t *req_complete,
4579 hci_req_complete_skb_t *req_complete_skb)
4580 {
4581 struct sk_buff *skb;
4582 unsigned long flags;
4583
4584 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4585
4586 /* If the completed command doesn't match the last one that was
4587 * sent we need to do special handling of it.
4588 */
4589 if (!hci_sent_cmd_data(hdev, opcode)) {
4590 /* Some CSR based controllers generate a spontaneous
4591 * reset complete event during init and any pending
4592 * command will never be completed. In such a case we
4593 * need to resend whatever was the last sent
4594 * command.
4595 */
4596 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4597 hci_resend_last(hdev);
4598
4599 return;
4600 }
4601
4602 /* If we reach this point this event matches the last command sent */
4603 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4604
4605 /* If the command succeeded and there's still more commands in
4606 * this request the request is not yet complete.
4607 */
4608 if (!status && !hci_req_is_complete(hdev))
4609 return;
4610
4611 /* If this was the last command in a request the complete
4612 * callback would be found in hdev->sent_cmd instead of the
4613 * command queue (hdev->cmd_q).
4614 */
4615 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4616 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4617 return;
4618 }
4619
4620 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4621 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4622 return;
4623 }
4624
4625 /* Remove all pending commands belonging to this request */
4626 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4627 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4628 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4629 __skb_queue_head(&hdev->cmd_q, skb);
4630 break;
4631 }
4632
4633 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4634 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4635 else
4636 *req_complete = bt_cb(skb)->hci.req_complete;
4637 kfree_skb(skb);
4638 }
4639 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4640 }
4641
4642 static void hci_rx_work(struct work_struct *work)
4643 {
4644 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4645 struct sk_buff *skb;
4646
4647 BT_DBG("%s", hdev->name);
4648
4649 while ((skb = skb_dequeue(&hdev->rx_q))) {
4650 /* Send copy to monitor */
4651 hci_send_to_monitor(hdev, skb);
4652
4653 if (atomic_read(&hdev->promisc)) {
4654 /* Send copy to the sockets */
4655 hci_send_to_sock(hdev, skb);
4656 }
4657
4658 /* If the device has been opened in HCI_USER_CHANNEL,
4659 * the userspace has exclusive access to device.
4660 * When device is HCI_INIT, we still need to process
4661 * the data packets to the driver in order
4662 * to complete its setup().
4663 */
4664 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4665 !test_bit(HCI_INIT, &hdev->flags)) {
4666 kfree_skb(skb);
4667 continue;
4668 }
4669
4670 if (test_bit(HCI_INIT, &hdev->flags)) {
4671 /* Don't process data packets in this states. */
4672 switch (hci_skb_pkt_type(skb)) {
4673 case HCI_ACLDATA_PKT:
4674 case HCI_SCODATA_PKT:
4675 case HCI_ISODATA_PKT:
4676 kfree_skb(skb);
4677 continue;
4678 }
4679 }
4680
4681 /* Process frame */
4682 switch (hci_skb_pkt_type(skb)) {
4683 case HCI_EVENT_PKT:
4684 BT_DBG("%s Event packet", hdev->name);
4685 hci_event_packet(hdev, skb);
4686 break;
4687
4688 case HCI_ACLDATA_PKT:
4689 BT_DBG("%s ACL data packet", hdev->name);
4690 hci_acldata_packet(hdev, skb);
4691 break;
4692
4693 case HCI_SCODATA_PKT:
4694 BT_DBG("%s SCO data packet", hdev->name);
4695 hci_scodata_packet(hdev, skb);
4696 break;
4697
4698 default:
4699 kfree_skb(skb);
4700 break;
4701 }
4702 }
4703 }
4704
4705 static void hci_cmd_work(struct work_struct *work)
4706 {
4707 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4708 struct sk_buff *skb;
4709
4710 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4711 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4712
4713 /* Send queued commands */
4714 if (atomic_read(&hdev->cmd_cnt)) {
4715 skb = skb_dequeue(&hdev->cmd_q);
4716 if (!skb)
4717 return;
4718
4719 kfree_skb(hdev->sent_cmd);
4720
4721 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4722 if (hdev->sent_cmd) {
4723 if (hci_req_status_pend(hdev))
4724 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4725 atomic_dec(&hdev->cmd_cnt);
4726 hci_send_frame(hdev, skb);
4727 if (test_bit(HCI_RESET, &hdev->flags))
4728 cancel_delayed_work(&hdev->cmd_timer);
4729 else
4730 schedule_delayed_work(&hdev->cmd_timer,
4731 HCI_CMD_TIMEOUT);
4732 } else {
4733 skb_queue_head(&hdev->cmd_q, skb);
4734 queue_work(hdev->workqueue, &hdev->cmd_work);
4735 }
4736 }
4737 }
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