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WIP FPC-III support
[linux/fpc-iii.git] / net / bluetooth / hci_core.c
blob9d2c9a1c552fd5a24697555dedc54d76ef8441dc
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/rfkill.h>
30 #include <linux/debugfs.h>
31 #include <linux/crypto.h>
32 #include <linux/property.h>
33 #include <linux/suspend.h>
34 #include <linux/wait.h>
35 #include <asm/unaligned.h>
36
37 #include <net/bluetooth/bluetooth.h>
38 #include <net/bluetooth/hci_core.h>
39 #include <net/bluetooth/l2cap.h>
40 #include <net/bluetooth/mgmt.h>
41
42 #include "hci_request.h"
43 #include "hci_debugfs.h"
44 #include "smp.h"
45 #include "leds.h"
46 #include "msft.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 !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
610 hci_req_add(req, HCI_OP_READ_DEF_ERR_DATA_REPORTING, 0, NULL);
611
612 /* Some older Broadcom based Bluetooth 1.2 controllers do not
613 * support the Read Page Scan Type command. Check support for
614 * this command in the bit mask of supported commands.
615 */
616 if (hdev->commands[13] & 0x01)
617 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
618
619 if (lmp_le_capable(hdev)) {
620 u8 events[8];
621
622 memset(events, 0, sizeof(events));
623
624 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
625 events[0] |= 0x10; /* LE Long Term Key Request */
626
627 /* If controller supports the Connection Parameters Request
628 * Link Layer Procedure, enable the corresponding event.
629 */
630 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
631 events[0] |= 0x20; /* LE Remote Connection
632 * Parameter Request
633 */
634
635 /* If the controller supports the Data Length Extension
636 * feature, enable the corresponding event.
637 */
638 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
639 events[0] |= 0x40; /* LE Data Length Change */
640
641 /* If the controller supports LL Privacy feature, enable
642 * the corresponding event.
643 */
644 if (hdev->le_features[0] & HCI_LE_LL_PRIVACY)
645 events[1] |= 0x02; /* LE Enhanced Connection
646 * Complete
647 */
648
649 /* If the controller supports Extended Scanner Filter
650 * Policies, enable the correspondig event.
651 */
652 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
653 events[1] |= 0x04; /* LE Direct Advertising
654 * Report
655 */
656
657 /* If the controller supports Channel Selection Algorithm #2
658 * feature, enable the corresponding event.
659 */
660 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
661 events[2] |= 0x08; /* LE Channel Selection
662 * Algorithm
663 */
664
665 /* If the controller supports the LE Set Scan Enable command,
666 * enable the corresponding advertising report event.
667 */
668 if (hdev->commands[26] & 0x08)
669 events[0] |= 0x02; /* LE Advertising Report */
670
671 /* If the controller supports the LE Create Connection
672 * command, enable the corresponding event.
673 */
674 if (hdev->commands[26] & 0x10)
675 events[0] |= 0x01; /* LE Connection Complete */
676
677 /* If the controller supports the LE Connection Update
678 * command, enable the corresponding event.
679 */
680 if (hdev->commands[27] & 0x04)
681 events[0] |= 0x04; /* LE Connection Update
682 * Complete
683 */
684
685 /* If the controller supports the LE Read Remote Used Features
686 * command, enable the corresponding event.
687 */
688 if (hdev->commands[27] & 0x20)
689 events[0] |= 0x08; /* LE Read Remote Used
690 * Features Complete
691 */
692
693 /* If the controller supports the LE Read Local P-256
694 * Public Key command, enable the corresponding event.
695 */
696 if (hdev->commands[34] & 0x02)
697 events[0] |= 0x80; /* LE Read Local P-256
698 * Public Key Complete
699 */
700
701 /* If the controller supports the LE Generate DHKey
702 * command, enable the corresponding event.
703 */
704 if (hdev->commands[34] & 0x04)
705 events[1] |= 0x01; /* LE Generate DHKey Complete */
706
707 /* If the controller supports the LE Set Default PHY or
708 * LE Set PHY commands, enable the corresponding event.
709 */
710 if (hdev->commands[35] & (0x20 | 0x40))
711 events[1] |= 0x08; /* LE PHY Update Complete */
712
713 /* If the controller supports LE Set Extended Scan Parameters
714 * and LE Set Extended Scan Enable commands, enable the
715 * corresponding event.
716 */
717 if (use_ext_scan(hdev))
718 events[1] |= 0x10; /* LE Extended Advertising
719 * Report
720 */
721
722 /* If the controller supports the LE Extended Advertising
723 * command, enable the corresponding event.
724 */
725 if (ext_adv_capable(hdev))
726 events[2] |= 0x02; /* LE Advertising Set
727 * Terminated
728 */
729
730 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
731 events);
732
733 /* Read LE Advertising Channel TX Power */
734 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
735 /* HCI TS spec forbids mixing of legacy and extended
736 * advertising commands wherein READ_ADV_TX_POWER is
737 * also included. So do not call it if extended adv
738 * is supported otherwise controller will return
739 * COMMAND_DISALLOWED for extended commands.
740 */
741 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
742 }
743
744 if (hdev->commands[38] & 0x80) {
745 /* Read LE Min/Max Tx Power*/
746 hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER,
747 0, NULL);
748 }
749
750 if (hdev->commands[26] & 0x40) {
751 /* Read LE White List Size */
752 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
753 0, NULL);
754 }
755
756 if (hdev->commands[26] & 0x80) {
757 /* Clear LE White List */
758 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
759 }
760
761 if (hdev->commands[34] & 0x40) {
762 /* Read LE Resolving List Size */
763 hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
764 0, NULL);
765 }
766
767 if (hdev->commands[34] & 0x20) {
768 /* Clear LE Resolving List */
769 hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
770 }
771
772 if (hdev->commands[35] & 0x04) {
773 __le16 rpa_timeout = cpu_to_le16(hdev->rpa_timeout);
774
775 /* Set RPA timeout */
776 hci_req_add(req, HCI_OP_LE_SET_RPA_TIMEOUT, 2,
777 &rpa_timeout);
778 }
779
780 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
781 /* Read LE Maximum Data Length */
782 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
783
784 /* Read LE Suggested Default Data Length */
785 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
786 }
787
788 if (ext_adv_capable(hdev)) {
789 /* Read LE Number of Supported Advertising Sets */
790 hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
791 0, NULL);
792 }
793
794 hci_set_le_support(req);
795 }
796
797 /* Read features beyond page 1 if available */
798 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
799 struct hci_cp_read_local_ext_features cp;
800
801 cp.page = p;
802 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
803 sizeof(cp), &cp);
804 }
805
806 return 0;
807 }
808
809 static int hci_init4_req(struct hci_request *req, unsigned long opt)
810 {
811 struct hci_dev *hdev = req->hdev;
812
813 /* Some Broadcom based Bluetooth controllers do not support the
814 * Delete Stored Link Key command. They are clearly indicating its
815 * absence in the bit mask of supported commands.
816 *
817 * Check the supported commands and only if the command is marked
818 * as supported send it. If not supported assume that the controller
819 * does not have actual support for stored link keys which makes this
820 * command redundant anyway.
821 *
822 * Some controllers indicate that they support handling deleting
823 * stored link keys, but they don't. The quirk lets a driver
824 * just disable this command.
825 */
826 if (hdev->commands[6] & 0x80 &&
827 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
828 struct hci_cp_delete_stored_link_key cp;
829
830 bacpy(&cp.bdaddr, BDADDR_ANY);
831 cp.delete_all = 0x01;
832 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
833 sizeof(cp), &cp);
834 }
835
836 /* Set event mask page 2 if the HCI command for it is supported */
837 if (hdev->commands[22] & 0x04)
838 hci_set_event_mask_page_2(req);
839
840 /* Read local codec list if the HCI command is supported */
841 if (hdev->commands[29] & 0x20)
842 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
843
844 /* Read local pairing options if the HCI command is supported */
845 if (hdev->commands[41] & 0x08)
846 hci_req_add(req, HCI_OP_READ_LOCAL_PAIRING_OPTS, 0, NULL);
847
848 /* Get MWS transport configuration if the HCI command is supported */
849 if (hdev->commands[30] & 0x08)
850 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
851
852 /* Check for Synchronization Train support */
853 if (lmp_sync_train_capable(hdev))
854 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
855
856 /* Enable Secure Connections if supported and configured */
857 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
858 bredr_sc_enabled(hdev)) {
859 u8 support = 0x01;
860
861 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
862 sizeof(support), &support);
863 }
864
865 /* Set erroneous data reporting if supported to the wideband speech
866 * setting value
867 */
868 if (hdev->commands[18] & 0x08 &&
869 !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks)) {
870 bool enabled = hci_dev_test_flag(hdev,
871 HCI_WIDEBAND_SPEECH_ENABLED);
872
873 if (enabled !=
874 (hdev->err_data_reporting == ERR_DATA_REPORTING_ENABLED)) {
875 struct hci_cp_write_def_err_data_reporting cp;
876
877 cp.err_data_reporting = enabled ?
878 ERR_DATA_REPORTING_ENABLED :
879 ERR_DATA_REPORTING_DISABLED;
880
881 hci_req_add(req, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
882 sizeof(cp), &cp);
883 }
884 }
885
886 /* Set Suggested Default Data Length to maximum if supported */
887 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
888 struct hci_cp_le_write_def_data_len cp;
889
890 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
891 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
892 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
893 }
894
895 /* Set Default PHY parameters if command is supported */
896 if (hdev->commands[35] & 0x20) {
897 struct hci_cp_le_set_default_phy cp;
898
899 cp.all_phys = 0x00;
900 cp.tx_phys = hdev->le_tx_def_phys;
901 cp.rx_phys = hdev->le_rx_def_phys;
902
903 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
904 }
905
906 return 0;
907 }
908
909 static int __hci_init(struct hci_dev *hdev)
910 {
911 int err;
912
913 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
914 if (err < 0)
915 return err;
916
917 if (hci_dev_test_flag(hdev, HCI_SETUP))
918 hci_debugfs_create_basic(hdev);
919
920 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
921 if (err < 0)
922 return err;
923
924 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
925 * BR/EDR/LE type controllers. AMP controllers only need the
926 * first two stages of init.
927 */
928 if (hdev->dev_type != HCI_PRIMARY)
929 return 0;
930
931 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
932 if (err < 0)
933 return err;
934
935 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
936 if (err < 0)
937 return err;
938
939 /* This function is only called when the controller is actually in
940 * configured state. When the controller is marked as unconfigured,
941 * this initialization procedure is not run.
942 *
943 * It means that it is possible that a controller runs through its
944 * setup phase and then discovers missing settings. If that is the
945 * case, then this function will not be called. It then will only
946 * be called during the config phase.
947 *
948 * So only when in setup phase or config phase, create the debugfs
949 * entries and register the SMP channels.
950 */
951 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
952 !hci_dev_test_flag(hdev, HCI_CONFIG))
953 return 0;
954
955 hci_debugfs_create_common(hdev);
956
957 if (lmp_bredr_capable(hdev))
958 hci_debugfs_create_bredr(hdev);
959
960 if (lmp_le_capable(hdev))
961 hci_debugfs_create_le(hdev);
962
963 return 0;
964 }
965
966 static int hci_init0_req(struct hci_request *req, unsigned long opt)
967 {
968 struct hci_dev *hdev = req->hdev;
969
970 BT_DBG("%s %ld", hdev->name, opt);
971
972 /* Reset */
973 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
974 hci_reset_req(req, 0);
975
976 /* Read Local Version */
977 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
978
979 /* Read BD Address */
980 if (hdev->set_bdaddr)
981 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
982
983 return 0;
984 }
985
986 static int __hci_unconf_init(struct hci_dev *hdev)
987 {
988 int err;
989
990 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
991 return 0;
992
993 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
994 if (err < 0)
995 return err;
996
997 if (hci_dev_test_flag(hdev, HCI_SETUP))
998 hci_debugfs_create_basic(hdev);
999
1000 return 0;
1001 }
1002
1003 static int hci_scan_req(struct hci_request *req, unsigned long opt)
1004 {
1005 __u8 scan = opt;
1006
1007 BT_DBG("%s %x", req->hdev->name, scan);
1008
1009 /* Inquiry and Page scans */
1010 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1011 return 0;
1012 }
1013
1014 static int hci_auth_req(struct hci_request *req, unsigned long opt)
1015 {
1016 __u8 auth = opt;
1017
1018 BT_DBG("%s %x", req->hdev->name, auth);
1019
1020 /* Authentication */
1021 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1022 return 0;
1023 }
1024
1025 static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
1026 {
1027 __u8 encrypt = opt;
1028
1029 BT_DBG("%s %x", req->hdev->name, encrypt);
1030
1031 /* Encryption */
1032 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1033 return 0;
1034 }
1035
1036 static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
1037 {
1038 __le16 policy = cpu_to_le16(opt);
1039
1040 BT_DBG("%s %x", req->hdev->name, policy);
1041
1042 /* Default link policy */
1043 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1044 return 0;
1045 }
1046
1047 /* Get HCI device by index.
1048 * Device is held on return. */
1049 struct hci_dev *hci_dev_get(int index)
1050 {
1051 struct hci_dev *hdev = NULL, *d;
1052
1053 BT_DBG("%d", index);
1054
1055 if (index < 0)
1056 return NULL;
1057
1058 read_lock(&hci_dev_list_lock);
1059 list_for_each_entry(d, &hci_dev_list, list) {
1060 if (d->id == index) {
1061 hdev = hci_dev_hold(d);
1062 break;
1063 }
1064 }
1065 read_unlock(&hci_dev_list_lock);
1066 return hdev;
1067 }
1068
1069 /* ---- Inquiry support ---- */
1070
1071 bool hci_discovery_active(struct hci_dev *hdev)
1072 {
1073 struct discovery_state *discov = &hdev->discovery;
1074
1075 switch (discov->state) {
1076 case DISCOVERY_FINDING:
1077 case DISCOVERY_RESOLVING:
1078 return true;
1079
1080 default:
1081 return false;
1082 }
1083 }
1084
1085 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1086 {
1087 int old_state = hdev->discovery.state;
1088
1089 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1090
1091 if (old_state == state)
1092 return;
1093
1094 hdev->discovery.state = state;
1095
1096 switch (state) {
1097 case DISCOVERY_STOPPED:
1098 hci_update_background_scan(hdev);
1099
1100 if (old_state != DISCOVERY_STARTING)
1101 mgmt_discovering(hdev, 0);
1102 break;
1103 case DISCOVERY_STARTING:
1104 break;
1105 case DISCOVERY_FINDING:
1106 mgmt_discovering(hdev, 1);
1107 break;
1108 case DISCOVERY_RESOLVING:
1109 break;
1110 case DISCOVERY_STOPPING:
1111 break;
1112 }
1113 }
1114
1115 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1116 {
1117 struct discovery_state *cache = &hdev->discovery;
1118 struct inquiry_entry *p, *n;
1119
1120 list_for_each_entry_safe(p, n, &cache->all, all) {
1121 list_del(&p->all);
1122 kfree(p);
1123 }
1124
1125 INIT_LIST_HEAD(&cache->unknown);
1126 INIT_LIST_HEAD(&cache->resolve);
1127 }
1128
1129 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1130 bdaddr_t *bdaddr)
1131 {
1132 struct discovery_state *cache = &hdev->discovery;
1133 struct inquiry_entry *e;
1134
1135 BT_DBG("cache %p, %pMR", cache, bdaddr);
1136
1137 list_for_each_entry(e, &cache->all, all) {
1138 if (!bacmp(&e->data.bdaddr, bdaddr))
1139 return e;
1140 }
1141
1142 return NULL;
1143 }
1144
1145 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1146 bdaddr_t *bdaddr)
1147 {
1148 struct discovery_state *cache = &hdev->discovery;
1149 struct inquiry_entry *e;
1150
1151 BT_DBG("cache %p, %pMR", cache, bdaddr);
1152
1153 list_for_each_entry(e, &cache->unknown, list) {
1154 if (!bacmp(&e->data.bdaddr, bdaddr))
1155 return e;
1156 }
1157
1158 return NULL;
1159 }
1160
1161 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1162 bdaddr_t *bdaddr,
1163 int state)
1164 {
1165 struct discovery_state *cache = &hdev->discovery;
1166 struct inquiry_entry *e;
1167
1168 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1169
1170 list_for_each_entry(e, &cache->resolve, list) {
1171 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1172 return e;
1173 if (!bacmp(&e->data.bdaddr, bdaddr))
1174 return e;
1175 }
1176
1177 return NULL;
1178 }
1179
1180 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1181 struct inquiry_entry *ie)
1182 {
1183 struct discovery_state *cache = &hdev->discovery;
1184 struct list_head *pos = &cache->resolve;
1185 struct inquiry_entry *p;
1186
1187 list_del(&ie->list);
1188
1189 list_for_each_entry(p, &cache->resolve, list) {
1190 if (p->name_state != NAME_PENDING &&
1191 abs(p->data.rssi) >= abs(ie->data.rssi))
1192 break;
1193 pos = &p->list;
1194 }
1195
1196 list_add(&ie->list, pos);
1197 }
1198
1199 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1200 bool name_known)
1201 {
1202 struct discovery_state *cache = &hdev->discovery;
1203 struct inquiry_entry *ie;
1204 u32 flags = 0;
1205
1206 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1207
1208 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1209
1210 if (!data->ssp_mode)
1211 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1212
1213 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1214 if (ie) {
1215 if (!ie->data.ssp_mode)
1216 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1217
1218 if (ie->name_state == NAME_NEEDED &&
1219 data->rssi != ie->data.rssi) {
1220 ie->data.rssi = data->rssi;
1221 hci_inquiry_cache_update_resolve(hdev, ie);
1222 }
1223
1224 goto update;
1225 }
1226
1227 /* Entry not in the cache. Add new one. */
1228 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1229 if (!ie) {
1230 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1231 goto done;
1232 }
1233
1234 list_add(&ie->all, &cache->all);
1235
1236 if (name_known) {
1237 ie->name_state = NAME_KNOWN;
1238 } else {
1239 ie->name_state = NAME_NOT_KNOWN;
1240 list_add(&ie->list, &cache->unknown);
1241 }
1242
1243 update:
1244 if (name_known && ie->name_state != NAME_KNOWN &&
1245 ie->name_state != NAME_PENDING) {
1246 ie->name_state = NAME_KNOWN;
1247 list_del(&ie->list);
1248 }
1249
1250 memcpy(&ie->data, data, sizeof(*data));
1251 ie->timestamp = jiffies;
1252 cache->timestamp = jiffies;
1253
1254 if (ie->name_state == NAME_NOT_KNOWN)
1255 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1256
1257 done:
1258 return flags;
1259 }
1260
1261 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1262 {
1263 struct discovery_state *cache = &hdev->discovery;
1264 struct inquiry_info *info = (struct inquiry_info *) buf;
1265 struct inquiry_entry *e;
1266 int copied = 0;
1267
1268 list_for_each_entry(e, &cache->all, all) {
1269 struct inquiry_data *data = &e->data;
1270
1271 if (copied >= num)
1272 break;
1273
1274 bacpy(&info->bdaddr, &data->bdaddr);
1275 info->pscan_rep_mode = data->pscan_rep_mode;
1276 info->pscan_period_mode = data->pscan_period_mode;
1277 info->pscan_mode = data->pscan_mode;
1278 memcpy(info->dev_class, data->dev_class, 3);
1279 info->clock_offset = data->clock_offset;
1280
1281 info++;
1282 copied++;
1283 }
1284
1285 BT_DBG("cache %p, copied %d", cache, copied);
1286 return copied;
1287 }
1288
1289 static int hci_inq_req(struct hci_request *req, unsigned long opt)
1290 {
1291 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1292 struct hci_dev *hdev = req->hdev;
1293 struct hci_cp_inquiry cp;
1294
1295 BT_DBG("%s", hdev->name);
1296
1297 if (test_bit(HCI_INQUIRY, &hdev->flags))
1298 return 0;
1299
1300 /* Start Inquiry */
1301 memcpy(&cp.lap, &ir->lap, 3);
1302 cp.length = ir->length;
1303 cp.num_rsp = ir->num_rsp;
1304 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1305
1306 return 0;
1307 }
1308
1309 int hci_inquiry(void __user *arg)
1310 {
1311 __u8 __user *ptr = arg;
1312 struct hci_inquiry_req ir;
1313 struct hci_dev *hdev;
1314 int err = 0, do_inquiry = 0, max_rsp;
1315 long timeo;
1316 __u8 *buf;
1317
1318 if (copy_from_user(&ir, ptr, sizeof(ir)))
1319 return -EFAULT;
1320
1321 hdev = hci_dev_get(ir.dev_id);
1322 if (!hdev)
1323 return -ENODEV;
1324
1325 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1326 err = -EBUSY;
1327 goto done;
1328 }
1329
1330 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1331 err = -EOPNOTSUPP;
1332 goto done;
1333 }
1334
1335 if (hdev->dev_type != HCI_PRIMARY) {
1336 err = -EOPNOTSUPP;
1337 goto done;
1338 }
1339
1340 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1341 err = -EOPNOTSUPP;
1342 goto done;
1343 }
1344
1345 hci_dev_lock(hdev);
1346 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1347 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1348 hci_inquiry_cache_flush(hdev);
1349 do_inquiry = 1;
1350 }
1351 hci_dev_unlock(hdev);
1352
1353 timeo = ir.length * msecs_to_jiffies(2000);
1354
1355 if (do_inquiry) {
1356 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1357 timeo, NULL);
1358 if (err < 0)
1359 goto done;
1360
1361 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1362 * cleared). If it is interrupted by a signal, return -EINTR.
1363 */
1364 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1365 TASK_INTERRUPTIBLE))
1366 return -EINTR;
1367 }
1368
1369 /* for unlimited number of responses we will use buffer with
1370 * 255 entries
1371 */
1372 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1373
1374 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1375 * copy it to the user space.
1376 */
1377 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1378 if (!buf) {
1379 err = -ENOMEM;
1380 goto done;
1381 }
1382
1383 hci_dev_lock(hdev);
1384 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1385 hci_dev_unlock(hdev);
1386
1387 BT_DBG("num_rsp %d", ir.num_rsp);
1388
1389 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1390 ptr += sizeof(ir);
1391 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1392 ir.num_rsp))
1393 err = -EFAULT;
1394 } else
1395 err = -EFAULT;
1396
1397 kfree(buf);
1398
1399 done:
1400 hci_dev_put(hdev);
1401 return err;
1402 }
1403
1404 /**
1405 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
1406 * (BD_ADDR) for a HCI device from
1407 * a firmware node property.
1408 * @hdev: The HCI device
1409 *
1410 * Search the firmware node for 'local-bd-address'.
1411 *
1412 * All-zero BD addresses are rejected, because those could be properties
1413 * that exist in the firmware tables, but were not updated by the firmware. For
1414 * example, the DTS could define 'local-bd-address', with zero BD addresses.
1415 */
1416 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
1417 {
1418 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
1419 bdaddr_t ba;
1420 int ret;
1421
1422 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
1423 (u8 *)&ba, sizeof(ba));
1424 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
1425 return;
1426
1427 bacpy(&hdev->public_addr, &ba);
1428 }
1429
1430 static int hci_dev_do_open(struct hci_dev *hdev)
1431 {
1432 int ret = 0;
1433
1434 BT_DBG("%s %p", hdev->name, hdev);
1435
1436 hci_req_sync_lock(hdev);
1437
1438 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1439 ret = -ENODEV;
1440 goto done;
1441 }
1442
1443 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1444 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1445 /* Check for rfkill but allow the HCI setup stage to
1446 * proceed (which in itself doesn't cause any RF activity).
1447 */
1448 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1449 ret = -ERFKILL;
1450 goto done;
1451 }
1452
1453 /* Check for valid public address or a configured static
1454 * random adddress, but let the HCI setup proceed to
1455 * be able to determine if there is a public address
1456 * or not.
1457 *
1458 * In case of user channel usage, it is not important
1459 * if a public address or static random address is
1460 * available.
1461 *
1462 * This check is only valid for BR/EDR controllers
1463 * since AMP controllers do not have an address.
1464 */
1465 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1466 hdev->dev_type == HCI_PRIMARY &&
1467 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1468 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1469 ret = -EADDRNOTAVAIL;
1470 goto done;
1471 }
1472 }
1473
1474 if (test_bit(HCI_UP, &hdev->flags)) {
1475 ret = -EALREADY;
1476 goto done;
1477 }
1478
1479 if (hdev->open(hdev)) {
1480 ret = -EIO;
1481 goto done;
1482 }
1483
1484 set_bit(HCI_RUNNING, &hdev->flags);
1485 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1486
1487 atomic_set(&hdev->cmd_cnt, 1);
1488 set_bit(HCI_INIT, &hdev->flags);
1489
1490 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1491 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1492 bool invalid_bdaddr;
1493
1494 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1495
1496 if (hdev->setup)
1497 ret = hdev->setup(hdev);
1498
1499 /* The transport driver can set the quirk to mark the
1500 * BD_ADDR invalid before creating the HCI device or in
1501 * its setup callback.
1502 */
1503 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
1504 &hdev->quirks);
1505
1506 if (ret)
1507 goto setup_failed;
1508
1509 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
1510 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
1511 hci_dev_get_bd_addr_from_property(hdev);
1512
1513 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1514 hdev->set_bdaddr) {
1515 ret = hdev->set_bdaddr(hdev,
1516 &hdev->public_addr);
1517
1518 /* If setting of the BD_ADDR from the device
1519 * property succeeds, then treat the address
1520 * as valid even if the invalid BD_ADDR
1521 * quirk indicates otherwise.
1522 */
1523 if (!ret)
1524 invalid_bdaddr = false;
1525 }
1526 }
1527
1528 setup_failed:
1529 /* The transport driver can set these quirks before
1530 * creating the HCI device or in its setup callback.
1531 *
1532 * For the invalid BD_ADDR quirk it is possible that
1533 * it becomes a valid address if the bootloader does
1534 * provide it (see above).
1535 *
1536 * In case any of them is set, the controller has to
1537 * start up as unconfigured.
1538 */
1539 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1540 invalid_bdaddr)
1541 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1542
1543 /* For an unconfigured controller it is required to
1544 * read at least the version information provided by
1545 * the Read Local Version Information command.
1546 *
1547 * If the set_bdaddr driver callback is provided, then
1548 * also the original Bluetooth public device address
1549 * will be read using the Read BD Address command.
1550 */
1551 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1552 ret = __hci_unconf_init(hdev);
1553 }
1554
1555 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1556 /* If public address change is configured, ensure that
1557 * the address gets programmed. If the driver does not
1558 * support changing the public address, fail the power
1559 * on procedure.
1560 */
1561 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1562 hdev->set_bdaddr)
1563 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1564 else
1565 ret = -EADDRNOTAVAIL;
1566 }
1567
1568 if (!ret) {
1569 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1570 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1571 ret = __hci_init(hdev);
1572 if (!ret && hdev->post_init)
1573 ret = hdev->post_init(hdev);
1574 }
1575 }
1576
1577 /* If the HCI Reset command is clearing all diagnostic settings,
1578 * then they need to be reprogrammed after the init procedure
1579 * completed.
1580 */
1581 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1582 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1583 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1584 ret = hdev->set_diag(hdev, true);
1585
1586 msft_do_open(hdev);
1587
1588 clear_bit(HCI_INIT, &hdev->flags);
1589
1590 if (!ret) {
1591 hci_dev_hold(hdev);
1592 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1593 hci_adv_instances_set_rpa_expired(hdev, true);
1594 set_bit(HCI_UP, &hdev->flags);
1595 hci_sock_dev_event(hdev, HCI_DEV_UP);
1596 hci_leds_update_powered(hdev, true);
1597 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1598 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1599 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1600 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1601 hci_dev_test_flag(hdev, HCI_MGMT) &&
1602 hdev->dev_type == HCI_PRIMARY) {
1603 ret = __hci_req_hci_power_on(hdev);
1604 mgmt_power_on(hdev, ret);
1605 }
1606 } else {
1607 /* Init failed, cleanup */
1608 flush_work(&hdev->tx_work);
1609 flush_work(&hdev->cmd_work);
1610 flush_work(&hdev->rx_work);
1611
1612 skb_queue_purge(&hdev->cmd_q);
1613 skb_queue_purge(&hdev->rx_q);
1614
1615 if (hdev->flush)
1616 hdev->flush(hdev);
1617
1618 if (hdev->sent_cmd) {
1619 kfree_skb(hdev->sent_cmd);
1620 hdev->sent_cmd = NULL;
1621 }
1622
1623 clear_bit(HCI_RUNNING, &hdev->flags);
1624 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1625
1626 hdev->close(hdev);
1627 hdev->flags &= BIT(HCI_RAW);
1628 }
1629
1630 done:
1631 hci_req_sync_unlock(hdev);
1632 return ret;
1633 }
1634
1635 /* ---- HCI ioctl helpers ---- */
1636
1637 int hci_dev_open(__u16 dev)
1638 {
1639 struct hci_dev *hdev;
1640 int err;
1641
1642 hdev = hci_dev_get(dev);
1643 if (!hdev)
1644 return -ENODEV;
1645
1646 /* Devices that are marked as unconfigured can only be powered
1647 * up as user channel. Trying to bring them up as normal devices
1648 * will result into a failure. Only user channel operation is
1649 * possible.
1650 *
1651 * When this function is called for a user channel, the flag
1652 * HCI_USER_CHANNEL will be set first before attempting to
1653 * open the device.
1654 */
1655 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1656 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1657 err = -EOPNOTSUPP;
1658 goto done;
1659 }
1660
1661 /* We need to ensure that no other power on/off work is pending
1662 * before proceeding to call hci_dev_do_open. This is
1663 * particularly important if the setup procedure has not yet
1664 * completed.
1665 */
1666 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1667 cancel_delayed_work(&hdev->power_off);
1668
1669 /* After this call it is guaranteed that the setup procedure
1670 * has finished. This means that error conditions like RFKILL
1671 * or no valid public or static random address apply.
1672 */
1673 flush_workqueue(hdev->req_workqueue);
1674
1675 /* For controllers not using the management interface and that
1676 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1677 * so that pairing works for them. Once the management interface
1678 * is in use this bit will be cleared again and userspace has
1679 * to explicitly enable it.
1680 */
1681 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1682 !hci_dev_test_flag(hdev, HCI_MGMT))
1683 hci_dev_set_flag(hdev, HCI_BONDABLE);
1684
1685 err = hci_dev_do_open(hdev);
1686
1687 done:
1688 hci_dev_put(hdev);
1689 return err;
1690 }
1691
1692 /* This function requires the caller holds hdev->lock */
1693 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1694 {
1695 struct hci_conn_params *p;
1696
1697 list_for_each_entry(p, &hdev->le_conn_params, list) {
1698 if (p->conn) {
1699 hci_conn_drop(p->conn);
1700 hci_conn_put(p->conn);
1701 p->conn = NULL;
1702 }
1703 list_del_init(&p->action);
1704 }
1705
1706 BT_DBG("All LE pending actions cleared");
1707 }
1708
1709 int hci_dev_do_close(struct hci_dev *hdev)
1710 {
1711 bool auto_off;
1712
1713 BT_DBG("%s %p", hdev->name, hdev);
1714
1715 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1716 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1717 test_bit(HCI_UP, &hdev->flags)) {
1718 /* Execute vendor specific shutdown routine */
1719 if (hdev->shutdown)
1720 hdev->shutdown(hdev);
1721 }
1722
1723 cancel_delayed_work(&hdev->power_off);
1724
1725 hci_request_cancel_all(hdev);
1726 hci_req_sync_lock(hdev);
1727
1728 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1729 cancel_delayed_work_sync(&hdev->cmd_timer);
1730 hci_req_sync_unlock(hdev);
1731 return 0;
1732 }
1733
1734 hci_leds_update_powered(hdev, false);
1735
1736 /* Flush RX and TX works */
1737 flush_work(&hdev->tx_work);
1738 flush_work(&hdev->rx_work);
1739
1740 if (hdev->discov_timeout > 0) {
1741 hdev->discov_timeout = 0;
1742 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1743 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1744 }
1745
1746 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1747 cancel_delayed_work(&hdev->service_cache);
1748
1749 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
1750 struct adv_info *adv_instance;
1751
1752 cancel_delayed_work_sync(&hdev->rpa_expired);
1753
1754 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
1755 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1756 }
1757
1758 /* Avoid potential lockdep warnings from the *_flush() calls by
1759 * ensuring the workqueue is empty up front.
1760 */
1761 drain_workqueue(hdev->workqueue);
1762
1763 hci_dev_lock(hdev);
1764
1765 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1766
1767 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1768
1769 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1770 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1771 hci_dev_test_flag(hdev, HCI_MGMT))
1772 __mgmt_power_off(hdev);
1773
1774 hci_inquiry_cache_flush(hdev);
1775 hci_pend_le_actions_clear(hdev);
1776 hci_conn_hash_flush(hdev);
1777 hci_dev_unlock(hdev);
1778
1779 smp_unregister(hdev);
1780
1781 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1782
1783 msft_do_close(hdev);
1784
1785 if (hdev->flush)
1786 hdev->flush(hdev);
1787
1788 /* Reset device */
1789 skb_queue_purge(&hdev->cmd_q);
1790 atomic_set(&hdev->cmd_cnt, 1);
1791 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1792 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1793 set_bit(HCI_INIT, &hdev->flags);
1794 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1795 clear_bit(HCI_INIT, &hdev->flags);
1796 }
1797
1798 /* flush cmd work */
1799 flush_work(&hdev->cmd_work);
1800
1801 /* Drop queues */
1802 skb_queue_purge(&hdev->rx_q);
1803 skb_queue_purge(&hdev->cmd_q);
1804 skb_queue_purge(&hdev->raw_q);
1805
1806 /* Drop last sent command */
1807 if (hdev->sent_cmd) {
1808 cancel_delayed_work_sync(&hdev->cmd_timer);
1809 kfree_skb(hdev->sent_cmd);
1810 hdev->sent_cmd = NULL;
1811 }
1812
1813 clear_bit(HCI_RUNNING, &hdev->flags);
1814 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1815
1816 if (test_and_clear_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks))
1817 wake_up(&hdev->suspend_wait_q);
1818
1819 /* After this point our queues are empty
1820 * and no tasks are scheduled. */
1821 hdev->close(hdev);
1822
1823 /* Clear flags */
1824 hdev->flags &= BIT(HCI_RAW);
1825 hci_dev_clear_volatile_flags(hdev);
1826
1827 /* Controller radio is available but is currently powered down */
1828 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1829
1830 memset(hdev->eir, 0, sizeof(hdev->eir));
1831 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1832 bacpy(&hdev->random_addr, BDADDR_ANY);
1833
1834 hci_req_sync_unlock(hdev);
1835
1836 hci_dev_put(hdev);
1837 return 0;
1838 }
1839
1840 int hci_dev_close(__u16 dev)
1841 {
1842 struct hci_dev *hdev;
1843 int err;
1844
1845 hdev = hci_dev_get(dev);
1846 if (!hdev)
1847 return -ENODEV;
1848
1849 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1850 err = -EBUSY;
1851 goto done;
1852 }
1853
1854 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1855 cancel_delayed_work(&hdev->power_off);
1856
1857 err = hci_dev_do_close(hdev);
1858
1859 done:
1860 hci_dev_put(hdev);
1861 return err;
1862 }
1863
1864 static int hci_dev_do_reset(struct hci_dev *hdev)
1865 {
1866 int ret;
1867
1868 BT_DBG("%s %p", hdev->name, hdev);
1869
1870 hci_req_sync_lock(hdev);
1871
1872 /* Drop queues */
1873 skb_queue_purge(&hdev->rx_q);
1874 skb_queue_purge(&hdev->cmd_q);
1875
1876 /* Avoid potential lockdep warnings from the *_flush() calls by
1877 * ensuring the workqueue is empty up front.
1878 */
1879 drain_workqueue(hdev->workqueue);
1880
1881 hci_dev_lock(hdev);
1882 hci_inquiry_cache_flush(hdev);
1883 hci_conn_hash_flush(hdev);
1884 hci_dev_unlock(hdev);
1885
1886 if (hdev->flush)
1887 hdev->flush(hdev);
1888
1889 atomic_set(&hdev->cmd_cnt, 1);
1890 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1891
1892 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1893
1894 hci_req_sync_unlock(hdev);
1895 return ret;
1896 }
1897
1898 int hci_dev_reset(__u16 dev)
1899 {
1900 struct hci_dev *hdev;
1901 int err;
1902
1903 hdev = hci_dev_get(dev);
1904 if (!hdev)
1905 return -ENODEV;
1906
1907 if (!test_bit(HCI_UP, &hdev->flags)) {
1908 err = -ENETDOWN;
1909 goto done;
1910 }
1911
1912 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1913 err = -EBUSY;
1914 goto done;
1915 }
1916
1917 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1918 err = -EOPNOTSUPP;
1919 goto done;
1920 }
1921
1922 err = hci_dev_do_reset(hdev);
1923
1924 done:
1925 hci_dev_put(hdev);
1926 return err;
1927 }
1928
1929 int hci_dev_reset_stat(__u16 dev)
1930 {
1931 struct hci_dev *hdev;
1932 int ret = 0;
1933
1934 hdev = hci_dev_get(dev);
1935 if (!hdev)
1936 return -ENODEV;
1937
1938 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1939 ret = -EBUSY;
1940 goto done;
1941 }
1942
1943 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1944 ret = -EOPNOTSUPP;
1945 goto done;
1946 }
1947
1948 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1949
1950 done:
1951 hci_dev_put(hdev);
1952 return ret;
1953 }
1954
1955 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1956 {
1957 bool conn_changed, discov_changed;
1958
1959 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1960
1961 if ((scan & SCAN_PAGE))
1962 conn_changed = !hci_dev_test_and_set_flag(hdev,
1963 HCI_CONNECTABLE);
1964 else
1965 conn_changed = hci_dev_test_and_clear_flag(hdev,
1966 HCI_CONNECTABLE);
1967
1968 if ((scan & SCAN_INQUIRY)) {
1969 discov_changed = !hci_dev_test_and_set_flag(hdev,
1970 HCI_DISCOVERABLE);
1971 } else {
1972 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1973 discov_changed = hci_dev_test_and_clear_flag(hdev,
1974 HCI_DISCOVERABLE);
1975 }
1976
1977 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1978 return;
1979
1980 if (conn_changed || discov_changed) {
1981 /* In case this was disabled through mgmt */
1982 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1983
1984 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1985 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1986
1987 mgmt_new_settings(hdev);
1988 }
1989 }
1990
1991 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1992 {
1993 struct hci_dev *hdev;
1994 struct hci_dev_req dr;
1995 int err = 0;
1996
1997 if (copy_from_user(&dr, arg, sizeof(dr)))
1998 return -EFAULT;
1999
2000 hdev = hci_dev_get(dr.dev_id);
2001 if (!hdev)
2002 return -ENODEV;
2003
2004 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
2005 err = -EBUSY;
2006 goto done;
2007 }
2008
2009 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
2010 err = -EOPNOTSUPP;
2011 goto done;
2012 }
2013
2014 if (hdev->dev_type != HCI_PRIMARY) {
2015 err = -EOPNOTSUPP;
2016 goto done;
2017 }
2018
2019 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
2020 err = -EOPNOTSUPP;
2021 goto done;
2022 }
2023
2024 switch (cmd) {
2025 case HCISETAUTH:
2026 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2027 HCI_INIT_TIMEOUT, NULL);
2028 break;
2029
2030 case HCISETENCRYPT:
2031 if (!lmp_encrypt_capable(hdev)) {
2032 err = -EOPNOTSUPP;
2033 break;
2034 }
2035
2036 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2037 /* Auth must be enabled first */
2038 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2039 HCI_INIT_TIMEOUT, NULL);
2040 if (err)
2041 break;
2042 }
2043
2044 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2045 HCI_INIT_TIMEOUT, NULL);
2046 break;
2047
2048 case HCISETSCAN:
2049 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2050 HCI_INIT_TIMEOUT, NULL);
2051
2052 /* Ensure that the connectable and discoverable states
2053 * get correctly modified as this was a non-mgmt change.
2054 */
2055 if (!err)
2056 hci_update_scan_state(hdev, dr.dev_opt);
2057 break;
2058
2059 case HCISETLINKPOL:
2060 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2061 HCI_INIT_TIMEOUT, NULL);
2062 break;
2063
2064 case HCISETLINKMODE:
2065 hdev->link_mode = ((__u16) dr.dev_opt) &
2066 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2067 break;
2068
2069 case HCISETPTYPE:
2070 if (hdev->pkt_type == (__u16) dr.dev_opt)
2071 break;
2072
2073 hdev->pkt_type = (__u16) dr.dev_opt;
2074 mgmt_phy_configuration_changed(hdev, NULL);
2075 break;
2076
2077 case HCISETACLMTU:
2078 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2079 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2080 break;
2081
2082 case HCISETSCOMTU:
2083 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2084 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2085 break;
2086
2087 default:
2088 err = -EINVAL;
2089 break;
2090 }
2091
2092 done:
2093 hci_dev_put(hdev);
2094 return err;
2095 }
2096
2097 int hci_get_dev_list(void __user *arg)
2098 {
2099 struct hci_dev *hdev;
2100 struct hci_dev_list_req *dl;
2101 struct hci_dev_req *dr;
2102 int n = 0, size, err;
2103 __u16 dev_num;
2104
2105 if (get_user(dev_num, (__u16 __user *) arg))
2106 return -EFAULT;
2107
2108 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2109 return -EINVAL;
2110
2111 size = sizeof(*dl) + dev_num * sizeof(*dr);
2112
2113 dl = kzalloc(size, GFP_KERNEL);
2114 if (!dl)
2115 return -ENOMEM;
2116
2117 dr = dl->dev_req;
2118
2119 read_lock(&hci_dev_list_lock);
2120 list_for_each_entry(hdev, &hci_dev_list, list) {
2121 unsigned long flags = hdev->flags;
2122
2123 /* When the auto-off is configured it means the transport
2124 * is running, but in that case still indicate that the
2125 * device is actually down.
2126 */
2127 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2128 flags &= ~BIT(HCI_UP);
2129
2130 (dr + n)->dev_id = hdev->id;
2131 (dr + n)->dev_opt = flags;
2132
2133 if (++n >= dev_num)
2134 break;
2135 }
2136 read_unlock(&hci_dev_list_lock);
2137
2138 dl->dev_num = n;
2139 size = sizeof(*dl) + n * sizeof(*dr);
2140
2141 err = copy_to_user(arg, dl, size);
2142 kfree(dl);
2143
2144 return err ? -EFAULT : 0;
2145 }
2146
2147 int hci_get_dev_info(void __user *arg)
2148 {
2149 struct hci_dev *hdev;
2150 struct hci_dev_info di;
2151 unsigned long flags;
2152 int err = 0;
2153
2154 if (copy_from_user(&di, arg, sizeof(di)))
2155 return -EFAULT;
2156
2157 hdev = hci_dev_get(di.dev_id);
2158 if (!hdev)
2159 return -ENODEV;
2160
2161 /* When the auto-off is configured it means the transport
2162 * is running, but in that case still indicate that the
2163 * device is actually down.
2164 */
2165 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2166 flags = hdev->flags & ~BIT(HCI_UP);
2167 else
2168 flags = hdev->flags;
2169
2170 strcpy(di.name, hdev->name);
2171 di.bdaddr = hdev->bdaddr;
2172 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2173 di.flags = flags;
2174 di.pkt_type = hdev->pkt_type;
2175 if (lmp_bredr_capable(hdev)) {
2176 di.acl_mtu = hdev->acl_mtu;
2177 di.acl_pkts = hdev->acl_pkts;
2178 di.sco_mtu = hdev->sco_mtu;
2179 di.sco_pkts = hdev->sco_pkts;
2180 } else {
2181 di.acl_mtu = hdev->le_mtu;
2182 di.acl_pkts = hdev->le_pkts;
2183 di.sco_mtu = 0;
2184 di.sco_pkts = 0;
2185 }
2186 di.link_policy = hdev->link_policy;
2187 di.link_mode = hdev->link_mode;
2188
2189 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2190 memcpy(&di.features, &hdev->features, sizeof(di.features));
2191
2192 if (copy_to_user(arg, &di, sizeof(di)))
2193 err = -EFAULT;
2194
2195 hci_dev_put(hdev);
2196
2197 return err;
2198 }
2199
2200 /* ---- Interface to HCI drivers ---- */
2201
2202 static int hci_rfkill_set_block(void *data, bool blocked)
2203 {
2204 struct hci_dev *hdev = data;
2205
2206 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2207
2208 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2209 return -EBUSY;
2210
2211 if (blocked) {
2212 hci_dev_set_flag(hdev, HCI_RFKILLED);
2213 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2214 !hci_dev_test_flag(hdev, HCI_CONFIG))
2215 hci_dev_do_close(hdev);
2216 } else {
2217 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2218 }
2219
2220 return 0;
2221 }
2222
2223 static const struct rfkill_ops hci_rfkill_ops = {
2224 .set_block = hci_rfkill_set_block,
2225 };
2226
2227 static void hci_power_on(struct work_struct *work)
2228 {
2229 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2230 int err;
2231
2232 BT_DBG("%s", hdev->name);
2233
2234 if (test_bit(HCI_UP, &hdev->flags) &&
2235 hci_dev_test_flag(hdev, HCI_MGMT) &&
2236 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2237 cancel_delayed_work(&hdev->power_off);
2238 hci_req_sync_lock(hdev);
2239 err = __hci_req_hci_power_on(hdev);
2240 hci_req_sync_unlock(hdev);
2241 mgmt_power_on(hdev, err);
2242 return;
2243 }
2244
2245 err = hci_dev_do_open(hdev);
2246 if (err < 0) {
2247 hci_dev_lock(hdev);
2248 mgmt_set_powered_failed(hdev, err);
2249 hci_dev_unlock(hdev);
2250 return;
2251 }
2252
2253 /* During the HCI setup phase, a few error conditions are
2254 * ignored and they need to be checked now. If they are still
2255 * valid, it is important to turn the device back off.
2256 */
2257 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2258 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2259 (hdev->dev_type == HCI_PRIMARY &&
2260 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2261 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2262 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2263 hci_dev_do_close(hdev);
2264 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2265 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2266 HCI_AUTO_OFF_TIMEOUT);
2267 }
2268
2269 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2270 /* For unconfigured devices, set the HCI_RAW flag
2271 * so that userspace can easily identify them.
2272 */
2273 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2274 set_bit(HCI_RAW, &hdev->flags);
2275
2276 /* For fully configured devices, this will send
2277 * the Index Added event. For unconfigured devices,
2278 * it will send Unconfigued Index Added event.
2279 *
2280 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2281 * and no event will be send.
2282 */
2283 mgmt_index_added(hdev);
2284 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2285 /* When the controller is now configured, then it
2286 * is important to clear the HCI_RAW flag.
2287 */
2288 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2289 clear_bit(HCI_RAW, &hdev->flags);
2290
2291 /* Powering on the controller with HCI_CONFIG set only
2292 * happens with the transition from unconfigured to
2293 * configured. This will send the Index Added event.
2294 */
2295 mgmt_index_added(hdev);
2296 }
2297 }
2298
2299 static void hci_power_off(struct work_struct *work)
2300 {
2301 struct hci_dev *hdev = container_of(work, struct hci_dev,
2302 power_off.work);
2303
2304 BT_DBG("%s", hdev->name);
2305
2306 hci_dev_do_close(hdev);
2307 }
2308
2309 static void hci_error_reset(struct work_struct *work)
2310 {
2311 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2312
2313 BT_DBG("%s", hdev->name);
2314
2315 if (hdev->hw_error)
2316 hdev->hw_error(hdev, hdev->hw_error_code);
2317 else
2318 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2319
2320 if (hci_dev_do_close(hdev))
2321 return;
2322
2323 hci_dev_do_open(hdev);
2324 }
2325
2326 void hci_uuids_clear(struct hci_dev *hdev)
2327 {
2328 struct bt_uuid *uuid, *tmp;
2329
2330 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2331 list_del(&uuid->list);
2332 kfree(uuid);
2333 }
2334 }
2335
2336 void hci_link_keys_clear(struct hci_dev *hdev)
2337 {
2338 struct link_key *key;
2339
2340 list_for_each_entry(key, &hdev->link_keys, list) {
2341 list_del_rcu(&key->list);
2342 kfree_rcu(key, rcu);
2343 }
2344 }
2345
2346 void hci_smp_ltks_clear(struct hci_dev *hdev)
2347 {
2348 struct smp_ltk *k;
2349
2350 list_for_each_entry(k, &hdev->long_term_keys, list) {
2351 list_del_rcu(&k->list);
2352 kfree_rcu(k, rcu);
2353 }
2354 }
2355
2356 void hci_smp_irks_clear(struct hci_dev *hdev)
2357 {
2358 struct smp_irk *k;
2359
2360 list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
2361 list_del_rcu(&k->list);
2362 kfree_rcu(k, rcu);
2363 }
2364 }
2365
2366 void hci_blocked_keys_clear(struct hci_dev *hdev)
2367 {
2368 struct blocked_key *b;
2369
2370 list_for_each_entry(b, &hdev->blocked_keys, list) {
2371 list_del_rcu(&b->list);
2372 kfree_rcu(b, rcu);
2373 }
2374 }
2375
2376 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
2377 {
2378 bool blocked = false;
2379 struct blocked_key *b;
2380
2381 rcu_read_lock();
2382 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
2383 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
2384 blocked = true;
2385 break;
2386 }
2387 }
2388
2389 rcu_read_unlock();
2390 return blocked;
2391 }
2392
2393 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2394 {
2395 struct link_key *k;
2396
2397 rcu_read_lock();
2398 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2399 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2400 rcu_read_unlock();
2401
2402 if (hci_is_blocked_key(hdev,
2403 HCI_BLOCKED_KEY_TYPE_LINKKEY,
2404 k->val)) {
2405 bt_dev_warn_ratelimited(hdev,
2406 "Link key blocked for %pMR",
2407 &k->bdaddr);
2408 return NULL;
2409 }
2410
2411 return k;
2412 }
2413 }
2414 rcu_read_unlock();
2415
2416 return NULL;
2417 }
2418
2419 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2420 u8 key_type, u8 old_key_type)
2421 {
2422 /* Legacy key */
2423 if (key_type < 0x03)
2424 return true;
2425
2426 /* Debug keys are insecure so don't store them persistently */
2427 if (key_type == HCI_LK_DEBUG_COMBINATION)
2428 return false;
2429
2430 /* Changed combination key and there's no previous one */
2431 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2432 return false;
2433
2434 /* Security mode 3 case */
2435 if (!conn)
2436 return true;
2437
2438 /* BR/EDR key derived using SC from an LE link */
2439 if (conn->type == LE_LINK)
2440 return true;
2441
2442 /* Neither local nor remote side had no-bonding as requirement */
2443 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2444 return true;
2445
2446 /* Local side had dedicated bonding as requirement */
2447 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2448 return true;
2449
2450 /* Remote side had dedicated bonding as requirement */
2451 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2452 return true;
2453
2454 /* If none of the above criteria match, then don't store the key
2455 * persistently */
2456 return false;
2457 }
2458
2459 static u8 ltk_role(u8 type)
2460 {
2461 if (type == SMP_LTK)
2462 return HCI_ROLE_MASTER;
2463
2464 return HCI_ROLE_SLAVE;
2465 }
2466
2467 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2468 u8 addr_type, u8 role)
2469 {
2470 struct smp_ltk *k;
2471
2472 rcu_read_lock();
2473 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2474 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2475 continue;
2476
2477 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2478 rcu_read_unlock();
2479
2480 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
2481 k->val)) {
2482 bt_dev_warn_ratelimited(hdev,
2483 "LTK blocked for %pMR",
2484 &k->bdaddr);
2485 return NULL;
2486 }
2487
2488 return k;
2489 }
2490 }
2491 rcu_read_unlock();
2492
2493 return NULL;
2494 }
2495
2496 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2497 {
2498 struct smp_irk *irk_to_return = NULL;
2499 struct smp_irk *irk;
2500
2501 rcu_read_lock();
2502 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2503 if (!bacmp(&irk->rpa, rpa)) {
2504 irk_to_return = irk;
2505 goto done;
2506 }
2507 }
2508
2509 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2510 if (smp_irk_matches(hdev, irk->val, rpa)) {
2511 bacpy(&irk->rpa, rpa);
2512 irk_to_return = irk;
2513 goto done;
2514 }
2515 }
2516
2517 done:
2518 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2519 irk_to_return->val)) {
2520 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2521 &irk_to_return->bdaddr);
2522 irk_to_return = NULL;
2523 }
2524
2525 rcu_read_unlock();
2526
2527 return irk_to_return;
2528 }
2529
2530 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2531 u8 addr_type)
2532 {
2533 struct smp_irk *irk_to_return = NULL;
2534 struct smp_irk *irk;
2535
2536 /* Identity Address must be public or static random */
2537 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2538 return NULL;
2539
2540 rcu_read_lock();
2541 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2542 if (addr_type == irk->addr_type &&
2543 bacmp(bdaddr, &irk->bdaddr) == 0) {
2544 irk_to_return = irk;
2545 goto done;
2546 }
2547 }
2548
2549 done:
2550
2551 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2552 irk_to_return->val)) {
2553 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2554 &irk_to_return->bdaddr);
2555 irk_to_return = NULL;
2556 }
2557
2558 rcu_read_unlock();
2559
2560 return irk_to_return;
2561 }
2562
2563 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2564 bdaddr_t *bdaddr, u8 *val, u8 type,
2565 u8 pin_len, bool *persistent)
2566 {
2567 struct link_key *key, *old_key;
2568 u8 old_key_type;
2569
2570 old_key = hci_find_link_key(hdev, bdaddr);
2571 if (old_key) {
2572 old_key_type = old_key->type;
2573 key = old_key;
2574 } else {
2575 old_key_type = conn ? conn->key_type : 0xff;
2576 key = kzalloc(sizeof(*key), GFP_KERNEL);
2577 if (!key)
2578 return NULL;
2579 list_add_rcu(&key->list, &hdev->link_keys);
2580 }
2581
2582 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2583
2584 /* Some buggy controller combinations generate a changed
2585 * combination key for legacy pairing even when there's no
2586 * previous key */
2587 if (type == HCI_LK_CHANGED_COMBINATION &&
2588 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2589 type = HCI_LK_COMBINATION;
2590 if (conn)
2591 conn->key_type = type;
2592 }
2593
2594 bacpy(&key->bdaddr, bdaddr);
2595 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2596 key->pin_len = pin_len;
2597
2598 if (type == HCI_LK_CHANGED_COMBINATION)
2599 key->type = old_key_type;
2600 else
2601 key->type = type;
2602
2603 if (persistent)
2604 *persistent = hci_persistent_key(hdev, conn, type,
2605 old_key_type);
2606
2607 return key;
2608 }
2609
2610 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2611 u8 addr_type, u8 type, u8 authenticated,
2612 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2613 {
2614 struct smp_ltk *key, *old_key;
2615 u8 role = ltk_role(type);
2616
2617 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2618 if (old_key)
2619 key = old_key;
2620 else {
2621 key = kzalloc(sizeof(*key), GFP_KERNEL);
2622 if (!key)
2623 return NULL;
2624 list_add_rcu(&key->list, &hdev->long_term_keys);
2625 }
2626
2627 bacpy(&key->bdaddr, bdaddr);
2628 key->bdaddr_type = addr_type;
2629 memcpy(key->val, tk, sizeof(key->val));
2630 key->authenticated = authenticated;
2631 key->ediv = ediv;
2632 key->rand = rand;
2633 key->enc_size = enc_size;
2634 key->type = type;
2635
2636 return key;
2637 }
2638
2639 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2640 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2641 {
2642 struct smp_irk *irk;
2643
2644 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2645 if (!irk) {
2646 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2647 if (!irk)
2648 return NULL;
2649
2650 bacpy(&irk->bdaddr, bdaddr);
2651 irk->addr_type = addr_type;
2652
2653 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2654 }
2655
2656 memcpy(irk->val, val, 16);
2657 bacpy(&irk->rpa, rpa);
2658
2659 return irk;
2660 }
2661
2662 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2663 {
2664 struct link_key *key;
2665
2666 key = hci_find_link_key(hdev, bdaddr);
2667 if (!key)
2668 return -ENOENT;
2669
2670 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2671
2672 list_del_rcu(&key->list);
2673 kfree_rcu(key, rcu);
2674
2675 return 0;
2676 }
2677
2678 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2679 {
2680 struct smp_ltk *k;
2681 int removed = 0;
2682
2683 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2684 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2685 continue;
2686
2687 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2688
2689 list_del_rcu(&k->list);
2690 kfree_rcu(k, rcu);
2691 removed++;
2692 }
2693
2694 return removed ? 0 : -ENOENT;
2695 }
2696
2697 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2698 {
2699 struct smp_irk *k;
2700
2701 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2702 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2703 continue;
2704
2705 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2706
2707 list_del_rcu(&k->list);
2708 kfree_rcu(k, rcu);
2709 }
2710 }
2711
2712 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2713 {
2714 struct smp_ltk *k;
2715 struct smp_irk *irk;
2716 u8 addr_type;
2717
2718 if (type == BDADDR_BREDR) {
2719 if (hci_find_link_key(hdev, bdaddr))
2720 return true;
2721 return false;
2722 }
2723
2724 /* Convert to HCI addr type which struct smp_ltk uses */
2725 if (type == BDADDR_LE_PUBLIC)
2726 addr_type = ADDR_LE_DEV_PUBLIC;
2727 else
2728 addr_type = ADDR_LE_DEV_RANDOM;
2729
2730 irk = hci_get_irk(hdev, bdaddr, addr_type);
2731 if (irk) {
2732 bdaddr = &irk->bdaddr;
2733 addr_type = irk->addr_type;
2734 }
2735
2736 rcu_read_lock();
2737 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2738 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2739 rcu_read_unlock();
2740 return true;
2741 }
2742 }
2743 rcu_read_unlock();
2744
2745 return false;
2746 }
2747
2748 /* HCI command timer function */
2749 static void hci_cmd_timeout(struct work_struct *work)
2750 {
2751 struct hci_dev *hdev = container_of(work, struct hci_dev,
2752 cmd_timer.work);
2753
2754 if (hdev->sent_cmd) {
2755 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2756 u16 opcode = __le16_to_cpu(sent->opcode);
2757
2758 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2759 } else {
2760 bt_dev_err(hdev, "command tx timeout");
2761 }
2762
2763 if (hdev->cmd_timeout)
2764 hdev->cmd_timeout(hdev);
2765
2766 atomic_set(&hdev->cmd_cnt, 1);
2767 queue_work(hdev->workqueue, &hdev->cmd_work);
2768 }
2769
2770 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2771 bdaddr_t *bdaddr, u8 bdaddr_type)
2772 {
2773 struct oob_data *data;
2774
2775 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2776 if (bacmp(bdaddr, &data->bdaddr) != 0)
2777 continue;
2778 if (data->bdaddr_type != bdaddr_type)
2779 continue;
2780 return data;
2781 }
2782
2783 return NULL;
2784 }
2785
2786 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2787 u8 bdaddr_type)
2788 {
2789 struct oob_data *data;
2790
2791 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2792 if (!data)
2793 return -ENOENT;
2794
2795 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2796
2797 list_del(&data->list);
2798 kfree(data);
2799
2800 return 0;
2801 }
2802
2803 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2804 {
2805 struct oob_data *data, *n;
2806
2807 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2808 list_del(&data->list);
2809 kfree(data);
2810 }
2811 }
2812
2813 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2814 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2815 u8 *hash256, u8 *rand256)
2816 {
2817 struct oob_data *data;
2818
2819 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2820 if (!data) {
2821 data = kmalloc(sizeof(*data), GFP_KERNEL);
2822 if (!data)
2823 return -ENOMEM;
2824
2825 bacpy(&data->bdaddr, bdaddr);
2826 data->bdaddr_type = bdaddr_type;
2827 list_add(&data->list, &hdev->remote_oob_data);
2828 }
2829
2830 if (hash192 && rand192) {
2831 memcpy(data->hash192, hash192, sizeof(data->hash192));
2832 memcpy(data->rand192, rand192, sizeof(data->rand192));
2833 if (hash256 && rand256)
2834 data->present = 0x03;
2835 } else {
2836 memset(data->hash192, 0, sizeof(data->hash192));
2837 memset(data->rand192, 0, sizeof(data->rand192));
2838 if (hash256 && rand256)
2839 data->present = 0x02;
2840 else
2841 data->present = 0x00;
2842 }
2843
2844 if (hash256 && rand256) {
2845 memcpy(data->hash256, hash256, sizeof(data->hash256));
2846 memcpy(data->rand256, rand256, sizeof(data->rand256));
2847 } else {
2848 memset(data->hash256, 0, sizeof(data->hash256));
2849 memset(data->rand256, 0, sizeof(data->rand256));
2850 if (hash192 && rand192)
2851 data->present = 0x01;
2852 }
2853
2854 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2855
2856 return 0;
2857 }
2858
2859 /* This function requires the caller holds hdev->lock */
2860 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2861 {
2862 struct adv_info *adv_instance;
2863
2864 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2865 if (adv_instance->instance == instance)
2866 return adv_instance;
2867 }
2868
2869 return NULL;
2870 }
2871
2872 /* This function requires the caller holds hdev->lock */
2873 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2874 {
2875 struct adv_info *cur_instance;
2876
2877 cur_instance = hci_find_adv_instance(hdev, instance);
2878 if (!cur_instance)
2879 return NULL;
2880
2881 if (cur_instance == list_last_entry(&hdev->adv_instances,
2882 struct adv_info, list))
2883 return list_first_entry(&hdev->adv_instances,
2884 struct adv_info, list);
2885 else
2886 return list_next_entry(cur_instance, list);
2887 }
2888
2889 /* This function requires the caller holds hdev->lock */
2890 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2891 {
2892 struct adv_info *adv_instance;
2893
2894 adv_instance = hci_find_adv_instance(hdev, instance);
2895 if (!adv_instance)
2896 return -ENOENT;
2897
2898 BT_DBG("%s removing %dMR", hdev->name, instance);
2899
2900 if (hdev->cur_adv_instance == instance) {
2901 if (hdev->adv_instance_timeout) {
2902 cancel_delayed_work(&hdev->adv_instance_expire);
2903 hdev->adv_instance_timeout = 0;
2904 }
2905 hdev->cur_adv_instance = 0x00;
2906 }
2907
2908 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2909
2910 list_del(&adv_instance->list);
2911 kfree(adv_instance);
2912
2913 hdev->adv_instance_cnt--;
2914
2915 return 0;
2916 }
2917
2918 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
2919 {
2920 struct adv_info *adv_instance, *n;
2921
2922 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
2923 adv_instance->rpa_expired = rpa_expired;
2924 }
2925
2926 /* This function requires the caller holds hdev->lock */
2927 void hci_adv_instances_clear(struct hci_dev *hdev)
2928 {
2929 struct adv_info *adv_instance, *n;
2930
2931 if (hdev->adv_instance_timeout) {
2932 cancel_delayed_work(&hdev->adv_instance_expire);
2933 hdev->adv_instance_timeout = 0;
2934 }
2935
2936 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2937 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2938 list_del(&adv_instance->list);
2939 kfree(adv_instance);
2940 }
2941
2942 hdev->adv_instance_cnt = 0;
2943 hdev->cur_adv_instance = 0x00;
2944 }
2945
2946 static void adv_instance_rpa_expired(struct work_struct *work)
2947 {
2948 struct adv_info *adv_instance = container_of(work, struct adv_info,
2949 rpa_expired_cb.work);
2950
2951 BT_DBG("");
2952
2953 adv_instance->rpa_expired = true;
2954 }
2955
2956 /* This function requires the caller holds hdev->lock */
2957 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2958 u16 adv_data_len, u8 *adv_data,
2959 u16 scan_rsp_len, u8 *scan_rsp_data,
2960 u16 timeout, u16 duration, s8 tx_power,
2961 u32 min_interval, u32 max_interval)
2962 {
2963 struct adv_info *adv_instance;
2964
2965 adv_instance = hci_find_adv_instance(hdev, instance);
2966 if (adv_instance) {
2967 memset(adv_instance->adv_data, 0,
2968 sizeof(adv_instance->adv_data));
2969 memset(adv_instance->scan_rsp_data, 0,
2970 sizeof(adv_instance->scan_rsp_data));
2971 } else {
2972 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
2973 instance < 1 || instance > hdev->le_num_of_adv_sets)
2974 return -EOVERFLOW;
2975
2976 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2977 if (!adv_instance)
2978 return -ENOMEM;
2979
2980 adv_instance->pending = true;
2981 adv_instance->instance = instance;
2982 list_add(&adv_instance->list, &hdev->adv_instances);
2983 hdev->adv_instance_cnt++;
2984 }
2985
2986 adv_instance->flags = flags;
2987 adv_instance->adv_data_len = adv_data_len;
2988 adv_instance->scan_rsp_len = scan_rsp_len;
2989 adv_instance->min_interval = min_interval;
2990 adv_instance->max_interval = max_interval;
2991 adv_instance->tx_power = tx_power;
2992
2993 if (adv_data_len)
2994 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2995
2996 if (scan_rsp_len)
2997 memcpy(adv_instance->scan_rsp_data,
2998 scan_rsp_data, scan_rsp_len);
2999
3000 adv_instance->timeout = timeout;
3001 adv_instance->remaining_time = timeout;
3002
3003 if (duration == 0)
3004 adv_instance->duration = hdev->def_multi_adv_rotation_duration;
3005 else
3006 adv_instance->duration = duration;
3007
3008 INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
3009 adv_instance_rpa_expired);
3010
3011 BT_DBG("%s for %dMR", hdev->name, instance);
3012
3013 return 0;
3014 }
3015
3016 /* This function requires the caller holds hdev->lock */
3017 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
3018 u16 adv_data_len, u8 *adv_data,
3019 u16 scan_rsp_len, u8 *scan_rsp_data)
3020 {
3021 struct adv_info *adv_instance;
3022
3023 adv_instance = hci_find_adv_instance(hdev, instance);
3024
3025 /* If advertisement doesn't exist, we can't modify its data */
3026 if (!adv_instance)
3027 return -ENOENT;
3028
3029 if (adv_data_len) {
3030 memset(adv_instance->adv_data, 0,
3031 sizeof(adv_instance->adv_data));
3032 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
3033 adv_instance->adv_data_len = adv_data_len;
3034 }
3035
3036 if (scan_rsp_len) {
3037 memset(adv_instance->scan_rsp_data, 0,
3038 sizeof(adv_instance->scan_rsp_data));
3039 memcpy(adv_instance->scan_rsp_data,
3040 scan_rsp_data, scan_rsp_len);
3041 adv_instance->scan_rsp_len = scan_rsp_len;
3042 }
3043
3044 return 0;
3045 }
3046
3047 /* This function requires the caller holds hdev->lock */
3048 void hci_adv_monitors_clear(struct hci_dev *hdev)
3049 {
3050 struct adv_monitor *monitor;
3051 int handle;
3052
3053 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
3054 hci_free_adv_monitor(monitor);
3055
3056 idr_destroy(&hdev->adv_monitors_idr);
3057 }
3058
3059 void hci_free_adv_monitor(struct adv_monitor *monitor)
3060 {
3061 struct adv_pattern *pattern;
3062 struct adv_pattern *tmp;
3063
3064 if (!monitor)
3065 return;
3066
3067 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list)
3068 kfree(pattern);
3069
3070 kfree(monitor);
3071 }
3072
3073 /* This function requires the caller holds hdev->lock */
3074 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
3075 {
3076 int min, max, handle;
3077
3078 if (!monitor)
3079 return -EINVAL;
3080
3081 min = HCI_MIN_ADV_MONITOR_HANDLE;
3082 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
3083 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
3084 GFP_KERNEL);
3085 if (handle < 0)
3086 return handle;
3087
3088 hdev->adv_monitors_cnt++;
3089 monitor->handle = handle;
3090
3091 hci_update_background_scan(hdev);
3092
3093 return 0;
3094 }
3095
3096 static int free_adv_monitor(int id, void *ptr, void *data)
3097 {
3098 struct hci_dev *hdev = data;
3099 struct adv_monitor *monitor = ptr;
3100
3101 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
3102 hci_free_adv_monitor(monitor);
3103 hdev->adv_monitors_cnt--;
3104
3105 return 0;
3106 }
3107
3108 /* This function requires the caller holds hdev->lock */
3109 int hci_remove_adv_monitor(struct hci_dev *hdev, u16 handle)
3110 {
3111 struct adv_monitor *monitor;
3112
3113 if (handle) {
3114 monitor = idr_find(&hdev->adv_monitors_idr, handle);
3115 if (!monitor)
3116 return -ENOENT;
3117
3118 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
3119 hci_free_adv_monitor(monitor);
3120 hdev->adv_monitors_cnt--;
3121 } else {
3122 /* Remove all monitors if handle is 0. */
3123 idr_for_each(&hdev->adv_monitors_idr, &free_adv_monitor, hdev);
3124 }
3125
3126 hci_update_background_scan(hdev);
3127
3128 return 0;
3129 }
3130
3131 /* This function requires the caller holds hdev->lock */
3132 bool hci_is_adv_monitoring(struct hci_dev *hdev)
3133 {
3134 return !idr_is_empty(&hdev->adv_monitors_idr);
3135 }
3136
3137 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
3138 bdaddr_t *bdaddr, u8 type)
3139 {
3140 struct bdaddr_list *b;
3141
3142 list_for_each_entry(b, bdaddr_list, list) {
3143 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3144 return b;
3145 }
3146
3147 return NULL;
3148 }
3149
3150 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
3151 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
3152 u8 type)
3153 {
3154 struct bdaddr_list_with_irk *b;
3155
3156 list_for_each_entry(b, bdaddr_list, list) {
3157 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3158 return b;
3159 }
3160
3161 return NULL;
3162 }
3163
3164 struct bdaddr_list_with_flags *
3165 hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
3166 bdaddr_t *bdaddr, u8 type)
3167 {
3168 struct bdaddr_list_with_flags *b;
3169
3170 list_for_each_entry(b, bdaddr_list, list) {
3171 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3172 return b;
3173 }
3174
3175 return NULL;
3176 }
3177
3178 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
3179 {
3180 struct bdaddr_list *b, *n;
3181
3182 list_for_each_entry_safe(b, n, bdaddr_list, list) {
3183 list_del(&b->list);
3184 kfree(b);
3185 }
3186 }
3187
3188 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3189 {
3190 struct bdaddr_list *entry;
3191
3192 if (!bacmp(bdaddr, BDADDR_ANY))
3193 return -EBADF;
3194
3195 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3196 return -EEXIST;
3197
3198 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3199 if (!entry)
3200 return -ENOMEM;
3201
3202 bacpy(&entry->bdaddr, bdaddr);
3203 entry->bdaddr_type = type;
3204
3205 list_add(&entry->list, list);
3206
3207 return 0;
3208 }
3209
3210 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3211 u8 type, u8 *peer_irk, u8 *local_irk)
3212 {
3213 struct bdaddr_list_with_irk *entry;
3214
3215 if (!bacmp(bdaddr, BDADDR_ANY))
3216 return -EBADF;
3217
3218 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3219 return -EEXIST;
3220
3221 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3222 if (!entry)
3223 return -ENOMEM;
3224
3225 bacpy(&entry->bdaddr, bdaddr);
3226 entry->bdaddr_type = type;
3227
3228 if (peer_irk)
3229 memcpy(entry->peer_irk, peer_irk, 16);
3230
3231 if (local_irk)
3232 memcpy(entry->local_irk, local_irk, 16);
3233
3234 list_add(&entry->list, list);
3235
3236 return 0;
3237 }
3238
3239 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
3240 u8 type, u32 flags)
3241 {
3242 struct bdaddr_list_with_flags *entry;
3243
3244 if (!bacmp(bdaddr, BDADDR_ANY))
3245 return -EBADF;
3246
3247 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3248 return -EEXIST;
3249
3250 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3251 if (!entry)
3252 return -ENOMEM;
3253
3254 bacpy(&entry->bdaddr, bdaddr);
3255 entry->bdaddr_type = type;
3256 entry->current_flags = flags;
3257
3258 list_add(&entry->list, list);
3259
3260 return 0;
3261 }
3262
3263 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3264 {
3265 struct bdaddr_list *entry;
3266
3267 if (!bacmp(bdaddr, BDADDR_ANY)) {
3268 hci_bdaddr_list_clear(list);
3269 return 0;
3270 }
3271
3272 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
3273 if (!entry)
3274 return -ENOENT;
3275
3276 list_del(&entry->list);
3277 kfree(entry);
3278
3279 return 0;
3280 }
3281
3282 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3283 u8 type)
3284 {
3285 struct bdaddr_list_with_irk *entry;
3286
3287 if (!bacmp(bdaddr, BDADDR_ANY)) {
3288 hci_bdaddr_list_clear(list);
3289 return 0;
3290 }
3291
3292 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
3293 if (!entry)
3294 return -ENOENT;
3295
3296 list_del(&entry->list);
3297 kfree(entry);
3298
3299 return 0;
3300 }
3301
3302 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
3303 u8 type)
3304 {
3305 struct bdaddr_list_with_flags *entry;
3306
3307 if (!bacmp(bdaddr, BDADDR_ANY)) {
3308 hci_bdaddr_list_clear(list);
3309 return 0;
3310 }
3311
3312 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
3313 if (!entry)
3314 return -ENOENT;
3315
3316 list_del(&entry->list);
3317 kfree(entry);
3318
3319 return 0;
3320 }
3321
3322 /* This function requires the caller holds hdev->lock */
3323 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3324 bdaddr_t *addr, u8 addr_type)
3325 {
3326 struct hci_conn_params *params;
3327
3328 list_for_each_entry(params, &hdev->le_conn_params, list) {
3329 if (bacmp(&params->addr, addr) == 0 &&
3330 params->addr_type == addr_type) {
3331 return params;
3332 }
3333 }
3334
3335 return NULL;
3336 }
3337
3338 /* This function requires the caller holds hdev->lock */
3339 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3340 bdaddr_t *addr, u8 addr_type)
3341 {
3342 struct hci_conn_params *param;
3343
3344 switch (addr_type) {
3345 case ADDR_LE_DEV_PUBLIC_RESOLVED:
3346 addr_type = ADDR_LE_DEV_PUBLIC;
3347 break;
3348 case ADDR_LE_DEV_RANDOM_RESOLVED:
3349 addr_type = ADDR_LE_DEV_RANDOM;
3350 break;
3351 }
3352
3353 list_for_each_entry(param, list, action) {
3354 if (bacmp(&param->addr, addr) == 0 &&
3355 param->addr_type == addr_type)
3356 return param;
3357 }
3358
3359 return NULL;
3360 }
3361
3362 /* This function requires the caller holds hdev->lock */
3363 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3364 bdaddr_t *addr, u8 addr_type)
3365 {
3366 struct hci_conn_params *params;
3367
3368 params = hci_conn_params_lookup(hdev, addr, addr_type);
3369 if (params)
3370 return params;
3371
3372 params = kzalloc(sizeof(*params), GFP_KERNEL);
3373 if (!params) {
3374 bt_dev_err(hdev, "out of memory");
3375 return NULL;
3376 }
3377
3378 bacpy(&params->addr, addr);
3379 params->addr_type = addr_type;
3380
3381 list_add(&params->list, &hdev->le_conn_params);
3382 INIT_LIST_HEAD(&params->action);
3383
3384 params->conn_min_interval = hdev->le_conn_min_interval;
3385 params->conn_max_interval = hdev->le_conn_max_interval;
3386 params->conn_latency = hdev->le_conn_latency;
3387 params->supervision_timeout = hdev->le_supv_timeout;
3388 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3389
3390 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3391
3392 return params;
3393 }
3394
3395 static void hci_conn_params_free(struct hci_conn_params *params)
3396 {
3397 if (params->conn) {
3398 hci_conn_drop(params->conn);
3399 hci_conn_put(params->conn);
3400 }
3401
3402 list_del(&params->action);
3403 list_del(&params->list);
3404 kfree(params);
3405 }
3406
3407 /* This function requires the caller holds hdev->lock */
3408 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3409 {
3410 struct hci_conn_params *params;
3411
3412 params = hci_conn_params_lookup(hdev, addr, addr_type);
3413 if (!params)
3414 return;
3415
3416 hci_conn_params_free(params);
3417
3418 hci_update_background_scan(hdev);
3419
3420 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3421 }
3422
3423 /* This function requires the caller holds hdev->lock */
3424 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3425 {
3426 struct hci_conn_params *params, *tmp;
3427
3428 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3429 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3430 continue;
3431
3432 /* If trying to estabilish one time connection to disabled
3433 * device, leave the params, but mark them as just once.
3434 */
3435 if (params->explicit_connect) {
3436 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
3437 continue;
3438 }
3439
3440 list_del(&params->list);
3441 kfree(params);
3442 }
3443
3444 BT_DBG("All LE disabled connection parameters were removed");
3445 }
3446
3447 /* This function requires the caller holds hdev->lock */
3448 static void hci_conn_params_clear_all(struct hci_dev *hdev)
3449 {
3450 struct hci_conn_params *params, *tmp;
3451
3452 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3453 hci_conn_params_free(params);
3454
3455 BT_DBG("All LE connection parameters were removed");
3456 }
3457
3458 /* Copy the Identity Address of the controller.
3459 *
3460 * If the controller has a public BD_ADDR, then by default use that one.
3461 * If this is a LE only controller without a public address, default to
3462 * the static random address.
3463 *
3464 * For debugging purposes it is possible to force controllers with a
3465 * public address to use the static random address instead.
3466 *
3467 * In case BR/EDR has been disabled on a dual-mode controller and
3468 * userspace has configured a static address, then that address
3469 * becomes the identity address instead of the public BR/EDR address.
3470 */
3471 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3472 u8 *bdaddr_type)
3473 {
3474 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3475 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3476 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3477 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3478 bacpy(bdaddr, &hdev->static_addr);
3479 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3480 } else {
3481 bacpy(bdaddr, &hdev->bdaddr);
3482 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3483 }
3484 }
3485
3486 static void hci_suspend_clear_tasks(struct hci_dev *hdev)
3487 {
3488 int i;
3489
3490 for (i = 0; i < __SUSPEND_NUM_TASKS; i++)
3491 clear_bit(i, hdev->suspend_tasks);
3492
3493 wake_up(&hdev->suspend_wait_q);
3494 }
3495
3496 static int hci_suspend_wait_event(struct hci_dev *hdev)
3497 {
3498 #define WAKE_COND \
3499 (find_first_bit(hdev->suspend_tasks, __SUSPEND_NUM_TASKS) == \
3500 __SUSPEND_NUM_TASKS)
3501
3502 int i;
3503 int ret = wait_event_timeout(hdev->suspend_wait_q,
3504 WAKE_COND, SUSPEND_NOTIFIER_TIMEOUT);
3505
3506 if (ret == 0) {
3507 bt_dev_err(hdev, "Timed out waiting for suspend events");
3508 for (i = 0; i < __SUSPEND_NUM_TASKS; ++i) {
3509 if (test_bit(i, hdev->suspend_tasks))
3510 bt_dev_err(hdev, "Suspend timeout bit: %d", i);
3511 clear_bit(i, hdev->suspend_tasks);
3512 }
3513
3514 ret = -ETIMEDOUT;
3515 } else {
3516 ret = 0;
3517 }
3518
3519 return ret;
3520 }
3521
3522 static void hci_prepare_suspend(struct work_struct *work)
3523 {
3524 struct hci_dev *hdev =
3525 container_of(work, struct hci_dev, suspend_prepare);
3526
3527 hci_dev_lock(hdev);
3528 hci_req_prepare_suspend(hdev, hdev->suspend_state_next);
3529 hci_dev_unlock(hdev);
3530 }
3531
3532 static int hci_change_suspend_state(struct hci_dev *hdev,
3533 enum suspended_state next)
3534 {
3535 hdev->suspend_state_next = next;
3536 set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
3537 queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
3538 return hci_suspend_wait_event(hdev);
3539 }
3540
3541 static void hci_clear_wake_reason(struct hci_dev *hdev)
3542 {
3543 hci_dev_lock(hdev);
3544
3545 hdev->wake_reason = 0;
3546 bacpy(&hdev->wake_addr, BDADDR_ANY);
3547 hdev->wake_addr_type = 0;
3548
3549 hci_dev_unlock(hdev);
3550 }
3551
3552 static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
3553 void *data)
3554 {
3555 struct hci_dev *hdev =
3556 container_of(nb, struct hci_dev, suspend_notifier);
3557 int ret = 0;
3558 u8 state = BT_RUNNING;
3559
3560 /* If powering down, wait for completion. */
3561 if (mgmt_powering_down(hdev)) {
3562 set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks);
3563 ret = hci_suspend_wait_event(hdev);
3564 if (ret)
3565 goto done;
3566 }
3567
3568 /* Suspend notifier should only act on events when powered. */
3569 if (!hdev_is_powered(hdev))
3570 goto done;
3571
3572 if (action == PM_SUSPEND_PREPARE) {
3573 /* Suspend consists of two actions:
3574 * - First, disconnect everything and make the controller not
3575 * connectable (disabling scanning)
3576 * - Second, program event filter/whitelist and enable scan
3577 */
3578 ret = hci_change_suspend_state(hdev, BT_SUSPEND_DISCONNECT);
3579 if (!ret)
3580 state = BT_SUSPEND_DISCONNECT;
3581
3582 /* Only configure whitelist if disconnect succeeded and wake
3583 * isn't being prevented.
3584 */
3585 if (!ret && !(hdev->prevent_wake && hdev->prevent_wake(hdev))) {
3586 ret = hci_change_suspend_state(hdev,
3587 BT_SUSPEND_CONFIGURE_WAKE);
3588 if (!ret)
3589 state = BT_SUSPEND_CONFIGURE_WAKE;
3590 }
3591
3592 hci_clear_wake_reason(hdev);
3593 mgmt_suspending(hdev, state);
3594
3595 } else if (action == PM_POST_SUSPEND) {
3596 ret = hci_change_suspend_state(hdev, BT_RUNNING);
3597
3598 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
3599 hdev->wake_addr_type);
3600 }
3601
3602 done:
3603 /* We always allow suspend even if suspend preparation failed and
3604 * attempt to recover in resume.
3605 */
3606 if (ret)
3607 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
3608 action, ret);
3609
3610 return NOTIFY_DONE;
3611 }
3612
3613 /* Alloc HCI device */
3614 struct hci_dev *hci_alloc_dev(void)
3615 {
3616 struct hci_dev *hdev;
3617
3618 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3619 if (!hdev)
3620 return NULL;
3621
3622 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3623 hdev->esco_type = (ESCO_HV1);
3624 hdev->link_mode = (HCI_LM_ACCEPT);
3625 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3626 hdev->io_capability = 0x03; /* No Input No Output */
3627 hdev->manufacturer = 0xffff; /* Default to internal use */
3628 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3629 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3630 hdev->adv_instance_cnt = 0;
3631 hdev->cur_adv_instance = 0x00;
3632 hdev->adv_instance_timeout = 0;
3633
3634 hdev->advmon_allowlist_duration = 300;
3635 hdev->advmon_no_filter_duration = 500;
3636 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
3637
3638 hdev->sniff_max_interval = 800;
3639 hdev->sniff_min_interval = 80;
3640
3641 hdev->le_adv_channel_map = 0x07;
3642 hdev->le_adv_min_interval = 0x0800;
3643 hdev->le_adv_max_interval = 0x0800;
3644 hdev->le_scan_interval = 0x0060;
3645 hdev->le_scan_window = 0x0030;
3646 hdev->le_scan_int_suspend = 0x0400;
3647 hdev->le_scan_window_suspend = 0x0012;
3648 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
3649 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
3650 hdev->le_scan_int_connect = 0x0060;
3651 hdev->le_scan_window_connect = 0x0060;
3652 hdev->le_conn_min_interval = 0x0018;
3653 hdev->le_conn_max_interval = 0x0028;
3654 hdev->le_conn_latency = 0x0000;
3655 hdev->le_supv_timeout = 0x002a;
3656 hdev->le_def_tx_len = 0x001b;
3657 hdev->le_def_tx_time = 0x0148;
3658 hdev->le_max_tx_len = 0x001b;
3659 hdev->le_max_tx_time = 0x0148;
3660 hdev->le_max_rx_len = 0x001b;
3661 hdev->le_max_rx_time = 0x0148;
3662 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
3663 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3664 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
3665 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3666 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
3667 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
3668 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
3669 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
3670 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
3671
3672 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3673 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3674 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3675 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3676 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
3677 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
3678
3679 /* default 1.28 sec page scan */
3680 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
3681 hdev->def_page_scan_int = 0x0800;
3682 hdev->def_page_scan_window = 0x0012;
3683
3684 mutex_init(&hdev->lock);
3685 mutex_init(&hdev->req_lock);
3686
3687 INIT_LIST_HEAD(&hdev->mgmt_pending);
3688 INIT_LIST_HEAD(&hdev->blacklist);
3689 INIT_LIST_HEAD(&hdev->whitelist);
3690 INIT_LIST_HEAD(&hdev->uuids);
3691 INIT_LIST_HEAD(&hdev->link_keys);
3692 INIT_LIST_HEAD(&hdev->long_term_keys);
3693 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3694 INIT_LIST_HEAD(&hdev->remote_oob_data);
3695 INIT_LIST_HEAD(&hdev->le_white_list);
3696 INIT_LIST_HEAD(&hdev->le_resolv_list);
3697 INIT_LIST_HEAD(&hdev->le_conn_params);
3698 INIT_LIST_HEAD(&hdev->pend_le_conns);
3699 INIT_LIST_HEAD(&hdev->pend_le_reports);
3700 INIT_LIST_HEAD(&hdev->conn_hash.list);
3701 INIT_LIST_HEAD(&hdev->adv_instances);
3702 INIT_LIST_HEAD(&hdev->blocked_keys);
3703
3704 INIT_WORK(&hdev->rx_work, hci_rx_work);
3705 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3706 INIT_WORK(&hdev->tx_work, hci_tx_work);
3707 INIT_WORK(&hdev->power_on, hci_power_on);
3708 INIT_WORK(&hdev->error_reset, hci_error_reset);
3709 INIT_WORK(&hdev->suspend_prepare, hci_prepare_suspend);
3710
3711 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3712
3713 skb_queue_head_init(&hdev->rx_q);
3714 skb_queue_head_init(&hdev->cmd_q);
3715 skb_queue_head_init(&hdev->raw_q);
3716
3717 init_waitqueue_head(&hdev->req_wait_q);
3718 init_waitqueue_head(&hdev->suspend_wait_q);
3719
3720 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3721
3722 hci_request_setup(hdev);
3723
3724 hci_init_sysfs(hdev);
3725 discovery_init(hdev);
3726
3727 return hdev;
3728 }
3729 EXPORT_SYMBOL(hci_alloc_dev);
3730
3731 /* Free HCI device */
3732 void hci_free_dev(struct hci_dev *hdev)
3733 {
3734 /* will free via device release */
3735 put_device(&hdev->dev);
3736 }
3737 EXPORT_SYMBOL(hci_free_dev);
3738
3739 /* Register HCI device */
3740 int hci_register_dev(struct hci_dev *hdev)
3741 {
3742 int id, error;
3743
3744 if (!hdev->open || !hdev->close || !hdev->send)
3745 return -EINVAL;
3746
3747 /* Do not allow HCI_AMP devices to register at index 0,
3748 * so the index can be used as the AMP controller ID.
3749 */
3750 switch (hdev->dev_type) {
3751 case HCI_PRIMARY:
3752 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3753 break;
3754 case HCI_AMP:
3755 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3756 break;
3757 default:
3758 return -EINVAL;
3759 }
3760
3761 if (id < 0)
3762 return id;
3763
3764 sprintf(hdev->name, "hci%d", id);
3765 hdev->id = id;
3766
3767 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3768
3769 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3770 if (!hdev->workqueue) {
3771 error = -ENOMEM;
3772 goto err;
3773 }
3774
3775 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3776 hdev->name);
3777 if (!hdev->req_workqueue) {
3778 destroy_workqueue(hdev->workqueue);
3779 error = -ENOMEM;
3780 goto err;
3781 }
3782
3783 if (!IS_ERR_OR_NULL(bt_debugfs))
3784 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3785
3786 dev_set_name(&hdev->dev, "%s", hdev->name);
3787
3788 error = device_add(&hdev->dev);
3789 if (error < 0)
3790 goto err_wqueue;
3791
3792 hci_leds_init(hdev);
3793
3794 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3795 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3796 hdev);
3797 if (hdev->rfkill) {
3798 if (rfkill_register(hdev->rfkill) < 0) {
3799 rfkill_destroy(hdev->rfkill);
3800 hdev->rfkill = NULL;
3801 }
3802 }
3803
3804 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3805 hci_dev_set_flag(hdev, HCI_RFKILLED);
3806
3807 hci_dev_set_flag(hdev, HCI_SETUP);
3808 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3809
3810 if (hdev->dev_type == HCI_PRIMARY) {
3811 /* Assume BR/EDR support until proven otherwise (such as
3812 * through reading supported features during init.
3813 */
3814 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3815 }
3816
3817 write_lock(&hci_dev_list_lock);
3818 list_add(&hdev->list, &hci_dev_list);
3819 write_unlock(&hci_dev_list_lock);
3820
3821 /* Devices that are marked for raw-only usage are unconfigured
3822 * and should not be included in normal operation.
3823 */
3824 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3825 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3826
3827 hci_sock_dev_event(hdev, HCI_DEV_REG);
3828 hci_dev_hold(hdev);
3829
3830 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
3831 error = register_pm_notifier(&hdev->suspend_notifier);
3832 if (error)
3833 goto err_wqueue;
3834
3835 queue_work(hdev->req_workqueue, &hdev->power_on);
3836
3837 idr_init(&hdev->adv_monitors_idr);
3838
3839 return id;
3840
3841 err_wqueue:
3842 destroy_workqueue(hdev->workqueue);
3843 destroy_workqueue(hdev->req_workqueue);
3844 err:
3845 ida_simple_remove(&hci_index_ida, hdev->id);
3846
3847 return error;
3848 }
3849 EXPORT_SYMBOL(hci_register_dev);
3850
3851 /* Unregister HCI device */
3852 void hci_unregister_dev(struct hci_dev *hdev)
3853 {
3854 int id;
3855
3856 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3857
3858 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3859
3860 id = hdev->id;
3861
3862 write_lock(&hci_dev_list_lock);
3863 list_del(&hdev->list);
3864 write_unlock(&hci_dev_list_lock);
3865
3866 cancel_work_sync(&hdev->power_on);
3867
3868 hci_suspend_clear_tasks(hdev);
3869 unregister_pm_notifier(&hdev->suspend_notifier);
3870 cancel_work_sync(&hdev->suspend_prepare);
3871
3872 hci_dev_do_close(hdev);
3873
3874 if (!test_bit(HCI_INIT, &hdev->flags) &&
3875 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3876 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3877 hci_dev_lock(hdev);
3878 mgmt_index_removed(hdev);
3879 hci_dev_unlock(hdev);
3880 }
3881
3882 /* mgmt_index_removed should take care of emptying the
3883 * pending list */
3884 BUG_ON(!list_empty(&hdev->mgmt_pending));
3885
3886 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3887
3888 if (hdev->rfkill) {
3889 rfkill_unregister(hdev->rfkill);
3890 rfkill_destroy(hdev->rfkill);
3891 }
3892
3893 device_del(&hdev->dev);
3894
3895 debugfs_remove_recursive(hdev->debugfs);
3896 kfree_const(hdev->hw_info);
3897 kfree_const(hdev->fw_info);
3898
3899 destroy_workqueue(hdev->workqueue);
3900 destroy_workqueue(hdev->req_workqueue);
3901
3902 hci_dev_lock(hdev);
3903 hci_bdaddr_list_clear(&hdev->blacklist);
3904 hci_bdaddr_list_clear(&hdev->whitelist);
3905 hci_uuids_clear(hdev);
3906 hci_link_keys_clear(hdev);
3907 hci_smp_ltks_clear(hdev);
3908 hci_smp_irks_clear(hdev);
3909 hci_remote_oob_data_clear(hdev);
3910 hci_adv_instances_clear(hdev);
3911 hci_adv_monitors_clear(hdev);
3912 hci_bdaddr_list_clear(&hdev->le_white_list);
3913 hci_bdaddr_list_clear(&hdev->le_resolv_list);
3914 hci_conn_params_clear_all(hdev);
3915 hci_discovery_filter_clear(hdev);
3916 hci_blocked_keys_clear(hdev);
3917 hci_dev_unlock(hdev);
3918
3919 hci_dev_put(hdev);
3920
3921 ida_simple_remove(&hci_index_ida, id);
3922 }
3923 EXPORT_SYMBOL(hci_unregister_dev);
3924
3925 /* Suspend HCI device */
3926 int hci_suspend_dev(struct hci_dev *hdev)
3927 {
3928 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3929 return 0;
3930 }
3931 EXPORT_SYMBOL(hci_suspend_dev);
3932
3933 /* Resume HCI device */
3934 int hci_resume_dev(struct hci_dev *hdev)
3935 {
3936 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3937 return 0;
3938 }
3939 EXPORT_SYMBOL(hci_resume_dev);
3940
3941 /* Reset HCI device */
3942 int hci_reset_dev(struct hci_dev *hdev)
3943 {
3944 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3945 struct sk_buff *skb;
3946
3947 skb = bt_skb_alloc(3, GFP_ATOMIC);
3948 if (!skb)
3949 return -ENOMEM;
3950
3951 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3952 skb_put_data(skb, hw_err, 3);
3953
3954 /* Send Hardware Error to upper stack */
3955 return hci_recv_frame(hdev, skb);
3956 }
3957 EXPORT_SYMBOL(hci_reset_dev);
3958
3959 /* Receive frame from HCI drivers */
3960 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3961 {
3962 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3963 && !test_bit(HCI_INIT, &hdev->flags))) {
3964 kfree_skb(skb);
3965 return -ENXIO;
3966 }
3967
3968 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3969 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3970 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
3971 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
3972 kfree_skb(skb);
3973 return -EINVAL;
3974 }
3975
3976 /* Incoming skb */
3977 bt_cb(skb)->incoming = 1;
3978
3979 /* Time stamp */
3980 __net_timestamp(skb);
3981
3982 skb_queue_tail(&hdev->rx_q, skb);
3983 queue_work(hdev->workqueue, &hdev->rx_work);
3984
3985 return 0;
3986 }
3987 EXPORT_SYMBOL(hci_recv_frame);
3988
3989 /* Receive diagnostic message from HCI drivers */
3990 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3991 {
3992 /* Mark as diagnostic packet */
3993 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3994
3995 /* Time stamp */
3996 __net_timestamp(skb);
3997
3998 skb_queue_tail(&hdev->rx_q, skb);
3999 queue_work(hdev->workqueue, &hdev->rx_work);
4000
4001 return 0;
4002 }
4003 EXPORT_SYMBOL(hci_recv_diag);
4004
4005 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
4006 {
4007 va_list vargs;
4008
4009 va_start(vargs, fmt);
4010 kfree_const(hdev->hw_info);
4011 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
4012 va_end(vargs);
4013 }
4014 EXPORT_SYMBOL(hci_set_hw_info);
4015
4016 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
4017 {
4018 va_list vargs;
4019
4020 va_start(vargs, fmt);
4021 kfree_const(hdev->fw_info);
4022 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
4023 va_end(vargs);
4024 }
4025 EXPORT_SYMBOL(hci_set_fw_info);
4026
4027 /* ---- Interface to upper protocols ---- */
4028
4029 int hci_register_cb(struct hci_cb *cb)
4030 {
4031 BT_DBG("%p name %s", cb, cb->name);
4032
4033 mutex_lock(&hci_cb_list_lock);
4034 list_add_tail(&cb->list, &hci_cb_list);
4035 mutex_unlock(&hci_cb_list_lock);
4036
4037 return 0;
4038 }
4039 EXPORT_SYMBOL(hci_register_cb);
4040
4041 int hci_unregister_cb(struct hci_cb *cb)
4042 {
4043 BT_DBG("%p name %s", cb, cb->name);
4044
4045 mutex_lock(&hci_cb_list_lock);
4046 list_del(&cb->list);
4047 mutex_unlock(&hci_cb_list_lock);
4048
4049 return 0;
4050 }
4051 EXPORT_SYMBOL(hci_unregister_cb);
4052
4053 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
4054 {
4055 int err;
4056
4057 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
4058 skb->len);
4059
4060 /* Time stamp */
4061 __net_timestamp(skb);
4062
4063 /* Send copy to monitor */
4064 hci_send_to_monitor(hdev, skb);
4065
4066 if (atomic_read(&hdev->promisc)) {
4067 /* Send copy to the sockets */
4068 hci_send_to_sock(hdev, skb);
4069 }
4070
4071 /* Get rid of skb owner, prior to sending to the driver. */
4072 skb_orphan(skb);
4073
4074 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
4075 kfree_skb(skb);
4076 return;
4077 }
4078
4079 err = hdev->send(hdev, skb);
4080 if (err < 0) {
4081 bt_dev_err(hdev, "sending frame failed (%d)", err);
4082 kfree_skb(skb);
4083 }
4084 }
4085
4086 /* Send HCI command */
4087 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
4088 const void *param)
4089 {
4090 struct sk_buff *skb;
4091
4092 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4093
4094 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4095 if (!skb) {
4096 bt_dev_err(hdev, "no memory for command");
4097 return -ENOMEM;
4098 }
4099
4100 /* Stand-alone HCI commands must be flagged as
4101 * single-command requests.
4102 */
4103 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
4104
4105 skb_queue_tail(&hdev->cmd_q, skb);
4106 queue_work(hdev->workqueue, &hdev->cmd_work);
4107
4108 return 0;
4109 }
4110
4111 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
4112 const void *param)
4113 {
4114 struct sk_buff *skb;
4115
4116 if (hci_opcode_ogf(opcode) != 0x3f) {
4117 /* A controller receiving a command shall respond with either
4118 * a Command Status Event or a Command Complete Event.
4119 * Therefore, all standard HCI commands must be sent via the
4120 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
4121 * Some vendors do not comply with this rule for vendor-specific
4122 * commands and do not return any event. We want to support
4123 * unresponded commands for such cases only.
4124 */
4125 bt_dev_err(hdev, "unresponded command not supported");
4126 return -EINVAL;
4127 }
4128
4129 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4130 if (!skb) {
4131 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
4132 opcode);
4133 return -ENOMEM;
4134 }
4135
4136 hci_send_frame(hdev, skb);
4137
4138 return 0;
4139 }
4140 EXPORT_SYMBOL(__hci_cmd_send);
4141
4142 /* Get data from the previously sent command */
4143 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
4144 {
4145 struct hci_command_hdr *hdr;
4146
4147 if (!hdev->sent_cmd)
4148 return NULL;
4149
4150 hdr = (void *) hdev->sent_cmd->data;
4151
4152 if (hdr->opcode != cpu_to_le16(opcode))
4153 return NULL;
4154
4155 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
4156
4157 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
4158 }
4159
4160 /* Send HCI command and wait for command commplete event */
4161 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
4162 const void *param, u32 timeout)
4163 {
4164 struct sk_buff *skb;
4165
4166 if (!test_bit(HCI_UP, &hdev->flags))
4167 return ERR_PTR(-ENETDOWN);
4168
4169 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
4170
4171 hci_req_sync_lock(hdev);
4172 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
4173 hci_req_sync_unlock(hdev);
4174
4175 return skb;
4176 }
4177 EXPORT_SYMBOL(hci_cmd_sync);
4178
4179 /* Send ACL data */
4180 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
4181 {
4182 struct hci_acl_hdr *hdr;
4183 int len = skb->len;
4184
4185 skb_push(skb, HCI_ACL_HDR_SIZE);
4186 skb_reset_transport_header(skb);
4187 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
4188 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
4189 hdr->dlen = cpu_to_le16(len);
4190 }
4191
4192 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
4193 struct sk_buff *skb, __u16 flags)
4194 {
4195 struct hci_conn *conn = chan->conn;
4196 struct hci_dev *hdev = conn->hdev;
4197 struct sk_buff *list;
4198
4199 skb->len = skb_headlen(skb);
4200 skb->data_len = 0;
4201
4202 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
4203
4204 switch (hdev->dev_type) {
4205 case HCI_PRIMARY:
4206 hci_add_acl_hdr(skb, conn->handle, flags);
4207 break;
4208 case HCI_AMP:
4209 hci_add_acl_hdr(skb, chan->handle, flags);
4210 break;
4211 default:
4212 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
4213 return;
4214 }
4215
4216 list = skb_shinfo(skb)->frag_list;
4217 if (!list) {
4218 /* Non fragmented */
4219 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
4220
4221 skb_queue_tail(queue, skb);
4222 } else {
4223 /* Fragmented */
4224 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4225
4226 skb_shinfo(skb)->frag_list = NULL;
4227
4228 /* Queue all fragments atomically. We need to use spin_lock_bh
4229 * here because of 6LoWPAN links, as there this function is
4230 * called from softirq and using normal spin lock could cause
4231 * deadlocks.
4232 */
4233 spin_lock_bh(&queue->lock);
4234
4235 __skb_queue_tail(queue, skb);
4236
4237 flags &= ~ACL_START;
4238 flags |= ACL_CONT;
4239 do {
4240 skb = list; list = list->next;
4241
4242 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
4243 hci_add_acl_hdr(skb, conn->handle, flags);
4244
4245 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4246
4247 __skb_queue_tail(queue, skb);
4248 } while (list);
4249
4250 spin_unlock_bh(&queue->lock);
4251 }
4252 }
4253
4254 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
4255 {
4256 struct hci_dev *hdev = chan->conn->hdev;
4257
4258 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
4259
4260 hci_queue_acl(chan, &chan->data_q, skb, flags);
4261
4262 queue_work(hdev->workqueue, &hdev->tx_work);
4263 }
4264
4265 /* Send SCO data */
4266 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
4267 {
4268 struct hci_dev *hdev = conn->hdev;
4269 struct hci_sco_hdr hdr;
4270
4271 BT_DBG("%s len %d", hdev->name, skb->len);
4272
4273 hdr.handle = cpu_to_le16(conn->handle);
4274 hdr.dlen = skb->len;
4275
4276 skb_push(skb, HCI_SCO_HDR_SIZE);
4277 skb_reset_transport_header(skb);
4278 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
4279
4280 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
4281
4282 skb_queue_tail(&conn->data_q, skb);
4283 queue_work(hdev->workqueue, &hdev->tx_work);
4284 }
4285
4286 /* ---- HCI TX task (outgoing data) ---- */
4287
4288 /* HCI Connection scheduler */
4289 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4290 int *quote)
4291 {
4292 struct hci_conn_hash *h = &hdev->conn_hash;
4293 struct hci_conn *conn = NULL, *c;
4294 unsigned int num = 0, min = ~0;
4295
4296 /* We don't have to lock device here. Connections are always
4297 * added and removed with TX task disabled. */
4298
4299 rcu_read_lock();
4300
4301 list_for_each_entry_rcu(c, &h->list, list) {
4302 if (c->type != type || skb_queue_empty(&c->data_q))
4303 continue;
4304
4305 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4306 continue;
4307
4308 num++;
4309
4310 if (c->sent < min) {
4311 min = c->sent;
4312 conn = c;
4313 }
4314
4315 if (hci_conn_num(hdev, type) == num)
4316 break;
4317 }
4318
4319 rcu_read_unlock();
4320
4321 if (conn) {
4322 int cnt, q;
4323
4324 switch (conn->type) {
4325 case ACL_LINK:
4326 cnt = hdev->acl_cnt;
4327 break;
4328 case SCO_LINK:
4329 case ESCO_LINK:
4330 cnt = hdev->sco_cnt;
4331 break;
4332 case LE_LINK:
4333 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4334 break;
4335 default:
4336 cnt = 0;
4337 bt_dev_err(hdev, "unknown link type %d", conn->type);
4338 }
4339
4340 q = cnt / num;
4341 *quote = q ? q : 1;
4342 } else
4343 *quote = 0;
4344
4345 BT_DBG("conn %p quote %d", conn, *quote);
4346 return conn;
4347 }
4348
4349 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
4350 {
4351 struct hci_conn_hash *h = &hdev->conn_hash;
4352 struct hci_conn *c;
4353
4354 bt_dev_err(hdev, "link tx timeout");
4355
4356 rcu_read_lock();
4357
4358 /* Kill stalled connections */
4359 list_for_each_entry_rcu(c, &h->list, list) {
4360 if (c->type == type && c->sent) {
4361 bt_dev_err(hdev, "killing stalled connection %pMR",
4362 &c->dst);
4363 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
4364 }
4365 }
4366
4367 rcu_read_unlock();
4368 }
4369
4370 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4371 int *quote)
4372 {
4373 struct hci_conn_hash *h = &hdev->conn_hash;
4374 struct hci_chan *chan = NULL;
4375 unsigned int num = 0, min = ~0, cur_prio = 0;
4376 struct hci_conn *conn;
4377 int cnt, q, conn_num = 0;
4378
4379 BT_DBG("%s", hdev->name);
4380
4381 rcu_read_lock();
4382
4383 list_for_each_entry_rcu(conn, &h->list, list) {
4384 struct hci_chan *tmp;
4385
4386 if (conn->type != type)
4387 continue;
4388
4389 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4390 continue;
4391
4392 conn_num++;
4393
4394 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
4395 struct sk_buff *skb;
4396
4397 if (skb_queue_empty(&tmp->data_q))
4398 continue;
4399
4400 skb = skb_peek(&tmp->data_q);
4401 if (skb->priority < cur_prio)
4402 continue;
4403
4404 if (skb->priority > cur_prio) {
4405 num = 0;
4406 min = ~0;
4407 cur_prio = skb->priority;
4408 }
4409
4410 num++;
4411
4412 if (conn->sent < min) {
4413 min = conn->sent;
4414 chan = tmp;
4415 }
4416 }
4417
4418 if (hci_conn_num(hdev, type) == conn_num)
4419 break;
4420 }
4421
4422 rcu_read_unlock();
4423
4424 if (!chan)
4425 return NULL;
4426
4427 switch (chan->conn->type) {
4428 case ACL_LINK:
4429 cnt = hdev->acl_cnt;
4430 break;
4431 case AMP_LINK:
4432 cnt = hdev->block_cnt;
4433 break;
4434 case SCO_LINK:
4435 case ESCO_LINK:
4436 cnt = hdev->sco_cnt;
4437 break;
4438 case LE_LINK:
4439 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4440 break;
4441 default:
4442 cnt = 0;
4443 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
4444 }
4445
4446 q = cnt / num;
4447 *quote = q ? q : 1;
4448 BT_DBG("chan %p quote %d", chan, *quote);
4449 return chan;
4450 }
4451
4452 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4453 {
4454 struct hci_conn_hash *h = &hdev->conn_hash;
4455 struct hci_conn *conn;
4456 int num = 0;
4457
4458 BT_DBG("%s", hdev->name);
4459
4460 rcu_read_lock();
4461
4462 list_for_each_entry_rcu(conn, &h->list, list) {
4463 struct hci_chan *chan;
4464
4465 if (conn->type != type)
4466 continue;
4467
4468 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4469 continue;
4470
4471 num++;
4472
4473 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4474 struct sk_buff *skb;
4475
4476 if (chan->sent) {
4477 chan->sent = 0;
4478 continue;
4479 }
4480
4481 if (skb_queue_empty(&chan->data_q))
4482 continue;
4483
4484 skb = skb_peek(&chan->data_q);
4485 if (skb->priority >= HCI_PRIO_MAX - 1)
4486 continue;
4487
4488 skb->priority = HCI_PRIO_MAX - 1;
4489
4490 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
4491 skb->priority);
4492 }
4493
4494 if (hci_conn_num(hdev, type) == num)
4495 break;
4496 }
4497
4498 rcu_read_unlock();
4499
4500 }
4501
4502 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4503 {
4504 /* Calculate count of blocks used by this packet */
4505 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4506 }
4507
4508 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4509 {
4510 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4511 /* ACL tx timeout must be longer than maximum
4512 * link supervision timeout (40.9 seconds) */
4513 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4514 HCI_ACL_TX_TIMEOUT))
4515 hci_link_tx_to(hdev, ACL_LINK);
4516 }
4517 }
4518
4519 /* Schedule SCO */
4520 static void hci_sched_sco(struct hci_dev *hdev)
4521 {
4522 struct hci_conn *conn;
4523 struct sk_buff *skb;
4524 int quote;
4525
4526 BT_DBG("%s", hdev->name);
4527
4528 if (!hci_conn_num(hdev, SCO_LINK))
4529 return;
4530
4531 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
4532 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4533 BT_DBG("skb %p len %d", skb, skb->len);
4534 hci_send_frame(hdev, skb);
4535
4536 conn->sent++;
4537 if (conn->sent == ~0)
4538 conn->sent = 0;
4539 }
4540 }
4541 }
4542
4543 static void hci_sched_esco(struct hci_dev *hdev)
4544 {
4545 struct hci_conn *conn;
4546 struct sk_buff *skb;
4547 int quote;
4548
4549 BT_DBG("%s", hdev->name);
4550
4551 if (!hci_conn_num(hdev, ESCO_LINK))
4552 return;
4553
4554 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4555 &quote))) {
4556 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4557 BT_DBG("skb %p len %d", skb, skb->len);
4558 hci_send_frame(hdev, skb);
4559
4560 conn->sent++;
4561 if (conn->sent == ~0)
4562 conn->sent = 0;
4563 }
4564 }
4565 }
4566
4567 static void hci_sched_acl_pkt(struct hci_dev *hdev)
4568 {
4569 unsigned int cnt = hdev->acl_cnt;
4570 struct hci_chan *chan;
4571 struct sk_buff *skb;
4572 int quote;
4573
4574 __check_timeout(hdev, cnt);
4575
4576 while (hdev->acl_cnt &&
4577 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
4578 u32 priority = (skb_peek(&chan->data_q))->priority;
4579 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4580 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4581 skb->len, skb->priority);
4582
4583 /* Stop if priority has changed */
4584 if (skb->priority < priority)
4585 break;
4586
4587 skb = skb_dequeue(&chan->data_q);
4588
4589 hci_conn_enter_active_mode(chan->conn,
4590 bt_cb(skb)->force_active);
4591
4592 hci_send_frame(hdev, skb);
4593 hdev->acl_last_tx = jiffies;
4594
4595 hdev->acl_cnt--;
4596 chan->sent++;
4597 chan->conn->sent++;
4598
4599 /* Send pending SCO packets right away */
4600 hci_sched_sco(hdev);
4601 hci_sched_esco(hdev);
4602 }
4603 }
4604
4605 if (cnt != hdev->acl_cnt)
4606 hci_prio_recalculate(hdev, ACL_LINK);
4607 }
4608
4609 static void hci_sched_acl_blk(struct hci_dev *hdev)
4610 {
4611 unsigned int cnt = hdev->block_cnt;
4612 struct hci_chan *chan;
4613 struct sk_buff *skb;
4614 int quote;
4615 u8 type;
4616
4617 __check_timeout(hdev, cnt);
4618
4619 BT_DBG("%s", hdev->name);
4620
4621 if (hdev->dev_type == HCI_AMP)
4622 type = AMP_LINK;
4623 else
4624 type = ACL_LINK;
4625
4626 while (hdev->block_cnt > 0 &&
4627 (chan = hci_chan_sent(hdev, type, &quote))) {
4628 u32 priority = (skb_peek(&chan->data_q))->priority;
4629 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4630 int blocks;
4631
4632 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4633 skb->len, skb->priority);
4634
4635 /* Stop if priority has changed */
4636 if (skb->priority < priority)
4637 break;
4638
4639 skb = skb_dequeue(&chan->data_q);
4640
4641 blocks = __get_blocks(hdev, skb);
4642 if (blocks > hdev->block_cnt)
4643 return;
4644
4645 hci_conn_enter_active_mode(chan->conn,
4646 bt_cb(skb)->force_active);
4647
4648 hci_send_frame(hdev, skb);
4649 hdev->acl_last_tx = jiffies;
4650
4651 hdev->block_cnt -= blocks;
4652 quote -= blocks;
4653
4654 chan->sent += blocks;
4655 chan->conn->sent += blocks;
4656 }
4657 }
4658
4659 if (cnt != hdev->block_cnt)
4660 hci_prio_recalculate(hdev, type);
4661 }
4662
4663 static void hci_sched_acl(struct hci_dev *hdev)
4664 {
4665 BT_DBG("%s", hdev->name);
4666
4667 /* No ACL link over BR/EDR controller */
4668 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4669 return;
4670
4671 /* No AMP link over AMP controller */
4672 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4673 return;
4674
4675 switch (hdev->flow_ctl_mode) {
4676 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4677 hci_sched_acl_pkt(hdev);
4678 break;
4679
4680 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4681 hci_sched_acl_blk(hdev);
4682 break;
4683 }
4684 }
4685
4686 static void hci_sched_le(struct hci_dev *hdev)
4687 {
4688 struct hci_chan *chan;
4689 struct sk_buff *skb;
4690 int quote, cnt, tmp;
4691
4692 BT_DBG("%s", hdev->name);
4693
4694 if (!hci_conn_num(hdev, LE_LINK))
4695 return;
4696
4697 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4698
4699 __check_timeout(hdev, cnt);
4700
4701 tmp = cnt;
4702 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
4703 u32 priority = (skb_peek(&chan->data_q))->priority;
4704 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4705 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4706 skb->len, skb->priority);
4707
4708 /* Stop if priority has changed */
4709 if (skb->priority < priority)
4710 break;
4711
4712 skb = skb_dequeue(&chan->data_q);
4713
4714 hci_send_frame(hdev, skb);
4715 hdev->le_last_tx = jiffies;
4716
4717 cnt--;
4718 chan->sent++;
4719 chan->conn->sent++;
4720
4721 /* Send pending SCO packets right away */
4722 hci_sched_sco(hdev);
4723 hci_sched_esco(hdev);
4724 }
4725 }
4726
4727 if (hdev->le_pkts)
4728 hdev->le_cnt = cnt;
4729 else
4730 hdev->acl_cnt = cnt;
4731
4732 if (cnt != tmp)
4733 hci_prio_recalculate(hdev, LE_LINK);
4734 }
4735
4736 static void hci_tx_work(struct work_struct *work)
4737 {
4738 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4739 struct sk_buff *skb;
4740
4741 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4742 hdev->sco_cnt, hdev->le_cnt);
4743
4744 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4745 /* Schedule queues and send stuff to HCI driver */
4746 hci_sched_sco(hdev);
4747 hci_sched_esco(hdev);
4748 hci_sched_acl(hdev);
4749 hci_sched_le(hdev);
4750 }
4751
4752 /* Send next queued raw (unknown type) packet */
4753 while ((skb = skb_dequeue(&hdev->raw_q)))
4754 hci_send_frame(hdev, skb);
4755 }
4756
4757 /* ----- HCI RX task (incoming data processing) ----- */
4758
4759 /* ACL data packet */
4760 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4761 {
4762 struct hci_acl_hdr *hdr = (void *) skb->data;
4763 struct hci_conn *conn;
4764 __u16 handle, flags;
4765
4766 skb_pull(skb, HCI_ACL_HDR_SIZE);
4767
4768 handle = __le16_to_cpu(hdr->handle);
4769 flags = hci_flags(handle);
4770 handle = hci_handle(handle);
4771
4772 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4773 handle, flags);
4774
4775 hdev->stat.acl_rx++;
4776
4777 hci_dev_lock(hdev);
4778 conn = hci_conn_hash_lookup_handle(hdev, handle);
4779 hci_dev_unlock(hdev);
4780
4781 if (conn) {
4782 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4783
4784 /* Send to upper protocol */
4785 l2cap_recv_acldata(conn, skb, flags);
4786 return;
4787 } else {
4788 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4789 handle);
4790 }
4791
4792 kfree_skb(skb);
4793 }
4794
4795 /* SCO data packet */
4796 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4797 {
4798 struct hci_sco_hdr *hdr = (void *) skb->data;
4799 struct hci_conn *conn;
4800 __u16 handle, flags;
4801
4802 skb_pull(skb, HCI_SCO_HDR_SIZE);
4803
4804 handle = __le16_to_cpu(hdr->handle);
4805 flags = hci_flags(handle);
4806 handle = hci_handle(handle);
4807
4808 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4809 handle, flags);
4810
4811 hdev->stat.sco_rx++;
4812
4813 hci_dev_lock(hdev);
4814 conn = hci_conn_hash_lookup_handle(hdev, handle);
4815 hci_dev_unlock(hdev);
4816
4817 if (conn) {
4818 /* Send to upper protocol */
4819 bt_cb(skb)->sco.pkt_status = flags & 0x03;
4820 sco_recv_scodata(conn, skb);
4821 return;
4822 } else {
4823 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4824 handle);
4825 }
4826
4827 kfree_skb(skb);
4828 }
4829
4830 static bool hci_req_is_complete(struct hci_dev *hdev)
4831 {
4832 struct sk_buff *skb;
4833
4834 skb = skb_peek(&hdev->cmd_q);
4835 if (!skb)
4836 return true;
4837
4838 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4839 }
4840
4841 static void hci_resend_last(struct hci_dev *hdev)
4842 {
4843 struct hci_command_hdr *sent;
4844 struct sk_buff *skb;
4845 u16 opcode;
4846
4847 if (!hdev->sent_cmd)
4848 return;
4849
4850 sent = (void *) hdev->sent_cmd->data;
4851 opcode = __le16_to_cpu(sent->opcode);
4852 if (opcode == HCI_OP_RESET)
4853 return;
4854
4855 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4856 if (!skb)
4857 return;
4858
4859 skb_queue_head(&hdev->cmd_q, skb);
4860 queue_work(hdev->workqueue, &hdev->cmd_work);
4861 }
4862
4863 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4864 hci_req_complete_t *req_complete,
4865 hci_req_complete_skb_t *req_complete_skb)
4866 {
4867 struct sk_buff *skb;
4868 unsigned long flags;
4869
4870 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4871
4872 /* If the completed command doesn't match the last one that was
4873 * sent we need to do special handling of it.
4874 */
4875 if (!hci_sent_cmd_data(hdev, opcode)) {
4876 /* Some CSR based controllers generate a spontaneous
4877 * reset complete event during init and any pending
4878 * command will never be completed. In such a case we
4879 * need to resend whatever was the last sent
4880 * command.
4881 */
4882 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4883 hci_resend_last(hdev);
4884
4885 return;
4886 }
4887
4888 /* If we reach this point this event matches the last command sent */
4889 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4890
4891 /* If the command succeeded and there's still more commands in
4892 * this request the request is not yet complete.
4893 */
4894 if (!status && !hci_req_is_complete(hdev))
4895 return;
4896
4897 /* If this was the last command in a request the complete
4898 * callback would be found in hdev->sent_cmd instead of the
4899 * command queue (hdev->cmd_q).
4900 */
4901 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4902 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4903 return;
4904 }
4905
4906 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4907 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4908 return;
4909 }
4910
4911 /* Remove all pending commands belonging to this request */
4912 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4913 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4914 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4915 __skb_queue_head(&hdev->cmd_q, skb);
4916 break;
4917 }
4918
4919 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4920 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4921 else
4922 *req_complete = bt_cb(skb)->hci.req_complete;
4923 kfree_skb(skb);
4924 }
4925 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4926 }
4927
4928 static void hci_rx_work(struct work_struct *work)
4929 {
4930 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4931 struct sk_buff *skb;
4932
4933 BT_DBG("%s", hdev->name);
4934
4935 while ((skb = skb_dequeue(&hdev->rx_q))) {
4936 /* Send copy to monitor */
4937 hci_send_to_monitor(hdev, skb);
4938
4939 if (atomic_read(&hdev->promisc)) {
4940 /* Send copy to the sockets */
4941 hci_send_to_sock(hdev, skb);
4942 }
4943
4944 /* If the device has been opened in HCI_USER_CHANNEL,
4945 * the userspace has exclusive access to device.
4946 * When device is HCI_INIT, we still need to process
4947 * the data packets to the driver in order
4948 * to complete its setup().
4949 */
4950 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4951 !test_bit(HCI_INIT, &hdev->flags)) {
4952 kfree_skb(skb);
4953 continue;
4954 }
4955
4956 if (test_bit(HCI_INIT, &hdev->flags)) {
4957 /* Don't process data packets in this states. */
4958 switch (hci_skb_pkt_type(skb)) {
4959 case HCI_ACLDATA_PKT:
4960 case HCI_SCODATA_PKT:
4961 case HCI_ISODATA_PKT:
4962 kfree_skb(skb);
4963 continue;
4964 }
4965 }
4966
4967 /* Process frame */
4968 switch (hci_skb_pkt_type(skb)) {
4969 case HCI_EVENT_PKT:
4970 BT_DBG("%s Event packet", hdev->name);
4971 hci_event_packet(hdev, skb);
4972 break;
4973
4974 case HCI_ACLDATA_PKT:
4975 BT_DBG("%s ACL data packet", hdev->name);
4976 hci_acldata_packet(hdev, skb);
4977 break;
4978
4979 case HCI_SCODATA_PKT:
4980 BT_DBG("%s SCO data packet", hdev->name);
4981 hci_scodata_packet(hdev, skb);
4982 break;
4983
4984 default:
4985 kfree_skb(skb);
4986 break;
4987 }
4988 }
4989 }
4990
4991 static void hci_cmd_work(struct work_struct *work)
4992 {
4993 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4994 struct sk_buff *skb;
4995
4996 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4997 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4998
4999 /* Send queued commands */
5000 if (atomic_read(&hdev->cmd_cnt)) {
5001 skb = skb_dequeue(&hdev->cmd_q);
5002 if (!skb)
5003 return;
5004
5005 kfree_skb(hdev->sent_cmd);
5006
5007 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
5008 if (hdev->sent_cmd) {
5009 if (hci_req_status_pend(hdev))
5010 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
5011 atomic_dec(&hdev->cmd_cnt);
5012 hci_send_frame(hdev, skb);
5013 if (test_bit(HCI_RESET, &hdev->flags))
5014 cancel_delayed_work(&hdev->cmd_timer);
5015 else
5016 schedule_delayed_work(&hdev->cmd_timer,
5017 HCI_CMD_TIMEOUT);
5018 } else {
5019 skb_queue_head(&hdev->cmd_q, skb);
5020 queue_work(hdev->workqueue, &hdev->cmd_work);
5021 }
5022 }
5023 }
Linux with added FPC-III support