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1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
28#include <linux/export.h>
29#include <linux/idr.h>
30#include <linux/rfkill.h>
31#include <linux/debugfs.h>
32#include <linux/crypto.h>
33#include <linux/property.h>
34#include <asm/unaligned.h>
35
36#include <net/bluetooth/bluetooth.h>
37#include <net/bluetooth/hci_core.h>
38#include <net/bluetooth/l2cap.h>
39#include <net/bluetooth/mgmt.h>
40
41#include "hci_request.h"
42#include "hci_debugfs.h"
43#include "smp.h"
44#include "leds.h"
45
46static void hci_rx_work(struct work_struct *work);
47static void hci_cmd_work(struct work_struct *work);
48static void hci_tx_work(struct work_struct *work);
49
50/* HCI device list */
51LIST_HEAD(hci_dev_list);
52DEFINE_RWLOCK(hci_dev_list_lock);
53
54/* HCI callback list */
55LIST_HEAD(hci_cb_list);
56DEFINE_MUTEX(hci_cb_list_lock);
57
58/* HCI ID Numbering */
59static DEFINE_IDA(hci_index_ida);
60
61/* ---- HCI debugfs entries ---- */
62
63static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
64 size_t count, loff_t *ppos)
65{
66 struct hci_dev *hdev = file->private_data;
67 char buf[3];
68
69 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
70 buf[1] = '\n';
71 buf[2] = '\0';
72 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
73}
74
75static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
76 size_t count, loff_t *ppos)
77{
78 struct hci_dev *hdev = file->private_data;
79 struct sk_buff *skb;
80 bool enable;
81 int err;
82
83 if (!test_bit(HCI_UP, &hdev->flags))
84 return -ENETDOWN;
85
86 err = kstrtobool_from_user(user_buf, count, &enable);
87 if (err)
88 return err;
89
90 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
91 return -EALREADY;
92
93 hci_req_sync_lock(hdev);
94 if (enable)
95 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
96 HCI_CMD_TIMEOUT);
97 else
98 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
99 HCI_CMD_TIMEOUT);
100 hci_req_sync_unlock(hdev);
101
102 if (IS_ERR(skb))
103 return PTR_ERR(skb);
104
105 kfree_skb(skb);
106
107 hci_dev_change_flag(hdev, HCI_DUT_MODE);
108
109 return count;
110}
111
112static const struct file_operations dut_mode_fops = {
113 .open = simple_open,
114 .read = dut_mode_read,
115 .write = dut_mode_write,
116 .llseek = default_llseek,
117};
118
119static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
120 size_t count, loff_t *ppos)
121{
122 struct hci_dev *hdev = file->private_data;
123 char buf[3];
124
125 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
126 buf[1] = '\n';
127 buf[2] = '\0';
128 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
129}
130
131static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
132 size_t count, loff_t *ppos)
133{
134 struct hci_dev *hdev = file->private_data;
135 bool enable;
136 int err;
137
138 err = kstrtobool_from_user(user_buf, count, &enable);
139 if (err)
140 return err;
141
142 /* When the diagnostic flags are not persistent and the transport
143 * is not active or in user channel operation, then there is no need
144 * for the vendor callback. Instead just store the desired value and
145 * the setting will be programmed when the controller gets powered on.
146 */
147 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
148 (!test_bit(HCI_RUNNING, &hdev->flags) ||
149 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
150 goto done;
151
152 hci_req_sync_lock(hdev);
153 err = hdev->set_diag(hdev, enable);
154 hci_req_sync_unlock(hdev);
155
156 if (err < 0)
157 return err;
158
159done:
160 if (enable)
161 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
162 else
163 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
164
165 return count;
166}
167
168static const struct file_operations vendor_diag_fops = {
169 .open = simple_open,
170 .read = vendor_diag_read,
171 .write = vendor_diag_write,
172 .llseek = default_llseek,
173};
174
175static void hci_debugfs_create_basic(struct hci_dev *hdev)
176{
177 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
178 &dut_mode_fops);
179
180 if (hdev->set_diag)
181 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
182 &vendor_diag_fops);
183}
184
185static int hci_reset_req(struct hci_request *req, unsigned long opt)
186{
187 BT_DBG("%s %ld", req->hdev->name, opt);
188
189 /* Reset device */
190 set_bit(HCI_RESET, &req->hdev->flags);
191 hci_req_add(req, HCI_OP_RESET, 0, NULL);
192 return 0;
193}
194
195static void bredr_init(struct hci_request *req)
196{
197 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
198
199 /* Read Local Supported Features */
200 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
201
202 /* Read Local Version */
203 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
204
205 /* Read BD Address */
206 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
207}
208
209static void amp_init1(struct hci_request *req)
210{
211 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
212
213 /* Read Local Version */
214 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
215
216 /* Read Local Supported Commands */
217 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
218
219 /* Read Local AMP Info */
220 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
221
222 /* Read Data Blk size */
223 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
224
225 /* Read Flow Control Mode */
226 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
227
228 /* Read Location Data */
229 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
230}
231
232static int amp_init2(struct hci_request *req)
233{
234 /* Read Local Supported Features. Not all AMP controllers
235 * support this so it's placed conditionally in the second
236 * stage init.
237 */
238 if (req->hdev->commands[14] & 0x20)
239 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
240
241 return 0;
242}
243
244static int hci_init1_req(struct hci_request *req, unsigned long opt)
245{
246 struct hci_dev *hdev = req->hdev;
247
248 BT_DBG("%s %ld", hdev->name, opt);
249
250 /* Reset */
251 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
252 hci_reset_req(req, 0);
253
254 switch (hdev->dev_type) {
255 case HCI_PRIMARY:
256 bredr_init(req);
257 break;
258 case HCI_AMP:
259 amp_init1(req);
260 break;
261 default:
262 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
263 break;
264 }
265
266 return 0;
267}
268
269static void bredr_setup(struct hci_request *req)
270{
271 __le16 param;
272 __u8 flt_type;
273
274 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
275 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
276
277 /* Read Class of Device */
278 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
279
280 /* Read Local Name */
281 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
282
283 /* Read Voice Setting */
284 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
285
286 /* Read Number of Supported IAC */
287 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
288
289 /* Read Current IAC LAP */
290 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
291
292 /* Clear Event Filters */
293 flt_type = HCI_FLT_CLEAR_ALL;
294 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
295
296 /* Connection accept timeout ~20 secs */
297 param = cpu_to_le16(0x7d00);
298 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
299}
300
301static void le_setup(struct hci_request *req)
302{
303 struct hci_dev *hdev = req->hdev;
304
305 /* Read LE Buffer Size */
306 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
307
308 /* Read LE Local Supported Features */
309 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
310
311 /* Read LE Supported States */
312 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
313
314 /* LE-only controllers have LE implicitly enabled */
315 if (!lmp_bredr_capable(hdev))
316 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
317}
318
319static void hci_setup_event_mask(struct hci_request *req)
320{
321 struct hci_dev *hdev = req->hdev;
322
323 /* The second byte is 0xff instead of 0x9f (two reserved bits
324 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
325 * command otherwise.
326 */
327 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
328
329 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
330 * any event mask for pre 1.2 devices.
331 */
332 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
333 return;
334
335 if (lmp_bredr_capable(hdev)) {
336 events[4] |= 0x01; /* Flow Specification Complete */
337 } else {
338 /* Use a different default for LE-only devices */
339 memset(events, 0, sizeof(events));
340 events[1] |= 0x20; /* Command Complete */
341 events[1] |= 0x40; /* Command Status */
342 events[1] |= 0x80; /* Hardware Error */
343
344 /* If the controller supports the Disconnect command, enable
345 * the corresponding event. In addition enable packet flow
346 * control related events.
347 */
348 if (hdev->commands[0] & 0x20) {
349 events[0] |= 0x10; /* Disconnection Complete */
350 events[2] |= 0x04; /* Number of Completed Packets */
351 events[3] |= 0x02; /* Data Buffer Overflow */
352 }
353
354 /* If the controller supports the Read Remote Version
355 * Information command, enable the corresponding event.
356 */
357 if (hdev->commands[2] & 0x80)
358 events[1] |= 0x08; /* Read Remote Version Information
359 * Complete
360 */
361
362 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
363 events[0] |= 0x80; /* Encryption Change */
364 events[5] |= 0x80; /* Encryption Key Refresh Complete */
365 }
366 }
367
368 if (lmp_inq_rssi_capable(hdev) ||
369 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
370 events[4] |= 0x02; /* Inquiry Result with RSSI */
371
372 if (lmp_ext_feat_capable(hdev))
373 events[4] |= 0x04; /* Read Remote Extended Features Complete */
374
375 if (lmp_esco_capable(hdev)) {
376 events[5] |= 0x08; /* Synchronous Connection Complete */
377 events[5] |= 0x10; /* Synchronous Connection Changed */
378 }
379
380 if (lmp_sniffsubr_capable(hdev))
381 events[5] |= 0x20; /* Sniff Subrating */
382
383 if (lmp_pause_enc_capable(hdev))
384 events[5] |= 0x80; /* Encryption Key Refresh Complete */
385
386 if (lmp_ext_inq_capable(hdev))
387 events[5] |= 0x40; /* Extended Inquiry Result */
388
389 if (lmp_no_flush_capable(hdev))
390 events[7] |= 0x01; /* Enhanced Flush Complete */
391
392 if (lmp_lsto_capable(hdev))
393 events[6] |= 0x80; /* Link Supervision Timeout Changed */
394
395 if (lmp_ssp_capable(hdev)) {
396 events[6] |= 0x01; /* IO Capability Request */
397 events[6] |= 0x02; /* IO Capability Response */
398 events[6] |= 0x04; /* User Confirmation Request */
399 events[6] |= 0x08; /* User Passkey Request */
400 events[6] |= 0x10; /* Remote OOB Data Request */
401 events[6] |= 0x20; /* Simple Pairing Complete */
402 events[7] |= 0x04; /* User Passkey Notification */
403 events[7] |= 0x08; /* Keypress Notification */
404 events[7] |= 0x10; /* Remote Host Supported
405 * Features Notification
406 */
407 }
408
409 if (lmp_le_capable(hdev))
410 events[7] |= 0x20; /* LE Meta-Event */
411
412 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
413}
414
415static int hci_init2_req(struct hci_request *req, unsigned long opt)
416{
417 struct hci_dev *hdev = req->hdev;
418
419 if (hdev->dev_type == HCI_AMP)
420 return amp_init2(req);
421
422 if (lmp_bredr_capable(hdev))
423 bredr_setup(req);
424 else
425 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
426
427 if (lmp_le_capable(hdev))
428 le_setup(req);
429
430 /* All Bluetooth 1.2 and later controllers should support the
431 * HCI command for reading the local supported commands.
432 *
433 * Unfortunately some controllers indicate Bluetooth 1.2 support,
434 * but do not have support for this command. If that is the case,
435 * the driver can quirk the behavior and skip reading the local
436 * supported commands.
437 */
438 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
439 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
440 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
441
442 if (lmp_ssp_capable(hdev)) {
443 /* When SSP is available, then the host features page
444 * should also be available as well. However some
445 * controllers list the max_page as 0 as long as SSP
446 * has not been enabled. To achieve proper debugging
447 * output, force the minimum max_page to 1 at least.
448 */
449 hdev->max_page = 0x01;
450
451 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
452 u8 mode = 0x01;
453
454 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
455 sizeof(mode), &mode);
456 } else {
457 struct hci_cp_write_eir cp;
458
459 memset(hdev->eir, 0, sizeof(hdev->eir));
460 memset(&cp, 0, sizeof(cp));
461
462 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
463 }
464 }
465
466 if (lmp_inq_rssi_capable(hdev) ||
467 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
468 u8 mode;
469
470 /* If Extended Inquiry Result events are supported, then
471 * they are clearly preferred over Inquiry Result with RSSI
472 * events.
473 */
474 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
475
476 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
477 }
478
479 if (lmp_inq_tx_pwr_capable(hdev))
480 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
481
482 if (lmp_ext_feat_capable(hdev)) {
483 struct hci_cp_read_local_ext_features cp;
484
485 cp.page = 0x01;
486 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
487 sizeof(cp), &cp);
488 }
489
490 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
491 u8 enable = 1;
492 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
493 &enable);
494 }
495
496 return 0;
497}
498
499static void hci_setup_link_policy(struct hci_request *req)
500{
501 struct hci_dev *hdev = req->hdev;
502 struct hci_cp_write_def_link_policy cp;
503 u16 link_policy = 0;
504
505 if (lmp_rswitch_capable(hdev))
506 link_policy |= HCI_LP_RSWITCH;
507 if (lmp_hold_capable(hdev))
508 link_policy |= HCI_LP_HOLD;
509 if (lmp_sniff_capable(hdev))
510 link_policy |= HCI_LP_SNIFF;
511 if (lmp_park_capable(hdev))
512 link_policy |= HCI_LP_PARK;
513
514 cp.policy = cpu_to_le16(link_policy);
515 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
516}
517
518static void hci_set_le_support(struct hci_request *req)
519{
520 struct hci_dev *hdev = req->hdev;
521 struct hci_cp_write_le_host_supported cp;
522
523 /* LE-only devices do not support explicit enablement */
524 if (!lmp_bredr_capable(hdev))
525 return;
526
527 memset(&cp, 0, sizeof(cp));
528
529 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
530 cp.le = 0x01;
531 cp.simul = 0x00;
532 }
533
534 if (cp.le != lmp_host_le_capable(hdev))
535 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
536 &cp);
537}
538
539static void hci_set_event_mask_page_2(struct hci_request *req)
540{
541 struct hci_dev *hdev = req->hdev;
542 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
543 bool changed = false;
544
545 /* If Connectionless Slave Broadcast master role is supported
546 * enable all necessary events for it.
547 */
548 if (lmp_csb_master_capable(hdev)) {
549 events[1] |= 0x40; /* Triggered Clock Capture */
550 events[1] |= 0x80; /* Synchronization Train Complete */
551 events[2] |= 0x10; /* Slave Page Response Timeout */
552 events[2] |= 0x20; /* CSB Channel Map Change */
553 changed = true;
554 }
555
556 /* If Connectionless Slave Broadcast slave role is supported
557 * enable all necessary events for it.
558 */
559 if (lmp_csb_slave_capable(hdev)) {
560 events[2] |= 0x01; /* Synchronization Train Received */
561 events[2] |= 0x02; /* CSB Receive */
562 events[2] |= 0x04; /* CSB Timeout */
563 events[2] |= 0x08; /* Truncated Page Complete */
564 changed = true;
565 }
566
567 /* Enable Authenticated Payload Timeout Expired event if supported */
568 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
569 events[2] |= 0x80;
570 changed = true;
571 }
572
573 /* Some Broadcom based controllers indicate support for Set Event
574 * Mask Page 2 command, but then actually do not support it. Since
575 * the default value is all bits set to zero, the command is only
576 * required if the event mask has to be changed. In case no change
577 * to the event mask is needed, skip this command.
578 */
579 if (changed)
580 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
581 sizeof(events), events);
582}
583
584static int hci_init3_req(struct hci_request *req, unsigned long opt)
585{
586 struct hci_dev *hdev = req->hdev;
587 u8 p;
588
589 hci_setup_event_mask(req);
590
591 if (hdev->commands[6] & 0x20 &&
592 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
593 struct hci_cp_read_stored_link_key cp;
594
595 bacpy(&cp.bdaddr, BDADDR_ANY);
596 cp.read_all = 0x01;
597 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
598 }
599
600 if (hdev->commands[5] & 0x10)
601 hci_setup_link_policy(req);
602
603 if (hdev->commands[8] & 0x01)
604 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
605
606 /* Some older Broadcom based Bluetooth 1.2 controllers do not
607 * support the Read Page Scan Type command. Check support for
608 * this command in the bit mask of supported commands.
609 */
610 if (hdev->commands[13] & 0x01)
611 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
612
613 if (lmp_le_capable(hdev)) {
614 u8 events[8];
615
616 memset(events, 0, sizeof(events));
617
618 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
619 events[0] |= 0x10; /* LE Long Term Key Request */
620
621 /* If controller supports the Connection Parameters Request
622 * Link Layer Procedure, enable the corresponding event.
623 */
624 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
625 events[0] |= 0x20; /* LE Remote Connection
626 * Parameter Request
627 */
628
629 /* If the controller supports the Data Length Extension
630 * feature, enable the corresponding event.
631 */
632 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
633 events[0] |= 0x40; /* LE Data Length Change */
634
635 /* If the controller supports Extended Scanner Filter
636 * Policies, enable the correspondig event.
637 */
638 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
639 events[1] |= 0x04; /* LE Direct Advertising
640 * Report
641 */
642
643 /* If the controller supports Channel Selection Algorithm #2
644 * feature, enable the corresponding event.
645 */
646 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
647 events[2] |= 0x08; /* LE Channel Selection
648 * Algorithm
649 */
650
651 /* If the controller supports the LE Set Scan Enable command,
652 * enable the corresponding advertising report event.
653 */
654 if (hdev->commands[26] & 0x08)
655 events[0] |= 0x02; /* LE Advertising Report */
656
657 /* If the controller supports the LE Create Connection
658 * command, enable the corresponding event.
659 */
660 if (hdev->commands[26] & 0x10)
661 events[0] |= 0x01; /* LE Connection Complete */
662
663 /* If the controller supports the LE Connection Update
664 * command, enable the corresponding event.
665 */
666 if (hdev->commands[27] & 0x04)
667 events[0] |= 0x04; /* LE Connection Update
668 * Complete
669 */
670
671 /* If the controller supports the LE Read Remote Used Features
672 * command, enable the corresponding event.
673 */
674 if (hdev->commands[27] & 0x20)
675 events[0] |= 0x08; /* LE Read Remote Used
676 * Features Complete
677 */
678
679 /* If the controller supports the LE Read Local P-256
680 * Public Key command, enable the corresponding event.
681 */
682 if (hdev->commands[34] & 0x02)
683 events[0] |= 0x80; /* LE Read Local P-256
684 * Public Key Complete
685 */
686
687 /* If the controller supports the LE Generate DHKey
688 * command, enable the corresponding event.
689 */
690 if (hdev->commands[34] & 0x04)
691 events[1] |= 0x01; /* LE Generate DHKey Complete */
692
693 /* If the controller supports the LE Set Default PHY or
694 * LE Set PHY commands, enable the corresponding event.
695 */
696 if (hdev->commands[35] & (0x20 | 0x40))
697 events[1] |= 0x08; /* LE PHY Update Complete */
698
699 /* If the controller supports LE Set Extended Scan Parameters
700 * and LE Set Extended Scan Enable commands, enable the
701 * corresponding event.
702 */
703 if (use_ext_scan(hdev))
704 events[1] |= 0x10; /* LE Extended Advertising
705 * Report
706 */
707
708 /* If the controller supports the LE Extended Create Connection
709 * command, enable the corresponding event.
710 */
711 if (use_ext_conn(hdev))
712 events[1] |= 0x02; /* LE Enhanced Connection
713 * Complete
714 */
715
716 /* If the controller supports the LE Extended Advertising
717 * command, enable the corresponding event.
718 */
719 if (ext_adv_capable(hdev))
720 events[2] |= 0x02; /* LE Advertising Set
721 * Terminated
722 */
723
724 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
725 events);
726
727 /* Read LE Advertising Channel TX Power */
728 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
729 /* HCI TS spec forbids mixing of legacy and extended
730 * advertising commands wherein READ_ADV_TX_POWER is
731 * also included. So do not call it if extended adv
732 * is supported otherwise controller will return
733 * COMMAND_DISALLOWED for extended commands.
734 */
735 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
736 }
737
738 if (hdev->commands[26] & 0x40) {
739 /* Read LE White List Size */
740 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
741 0, NULL);
742 }
743
744 if (hdev->commands[26] & 0x80) {
745 /* Clear LE White List */
746 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
747 }
748
749 if (hdev->commands[34] & 0x40) {
750 /* Read LE Resolving List Size */
751 hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
752 0, NULL);
753 }
754
755 if (hdev->commands[34] & 0x20) {
756 /* Clear LE Resolving List */
757 hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
758 }
759
760 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
761 /* Read LE Maximum Data Length */
762 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
763
764 /* Read LE Suggested Default Data Length */
765 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
766 }
767
768 if (ext_adv_capable(hdev)) {
769 /* Read LE Number of Supported Advertising Sets */
770 hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
771 0, NULL);
772 }
773
774 hci_set_le_support(req);
775 }
776
777 /* Read features beyond page 1 if available */
778 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
779 struct hci_cp_read_local_ext_features cp;
780
781 cp.page = p;
782 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
783 sizeof(cp), &cp);
784 }
785
786 return 0;
787}
788
789static int hci_init4_req(struct hci_request *req, unsigned long opt)
790{
791 struct hci_dev *hdev = req->hdev;
792
793 /* Some Broadcom based Bluetooth controllers do not support the
794 * Delete Stored Link Key command. They are clearly indicating its
795 * absence in the bit mask of supported commands.
796 *
797 * Check the supported commands and only if the the command is marked
798 * as supported send it. If not supported assume that the controller
799 * does not have actual support for stored link keys which makes this
800 * command redundant anyway.
801 *
802 * Some controllers indicate that they support handling deleting
803 * stored link keys, but they don't. The quirk lets a driver
804 * just disable this command.
805 */
806 if (hdev->commands[6] & 0x80 &&
807 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
808 struct hci_cp_delete_stored_link_key cp;
809
810 bacpy(&cp.bdaddr, BDADDR_ANY);
811 cp.delete_all = 0x01;
812 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
813 sizeof(cp), &cp);
814 }
815
816 /* Set event mask page 2 if the HCI command for it is supported */
817 if (hdev->commands[22] & 0x04)
818 hci_set_event_mask_page_2(req);
819
820 /* Read local codec list if the HCI command is supported */
821 if (hdev->commands[29] & 0x20)
822 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
823
824 /* Get MWS transport configuration if the HCI command is supported */
825 if (hdev->commands[30] & 0x08)
826 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
827
828 /* Check for Synchronization Train support */
829 if (lmp_sync_train_capable(hdev))
830 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
831
832 /* Enable Secure Connections if supported and configured */
833 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
834 bredr_sc_enabled(hdev)) {
835 u8 support = 0x01;
836
837 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
838 sizeof(support), &support);
839 }
840
841 /* Set Suggested Default Data Length to maximum if supported */
842 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
843 struct hci_cp_le_write_def_data_len cp;
844
845 cp.tx_len = hdev->le_max_tx_len;
846 cp.tx_time = hdev->le_max_tx_time;
847 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
848 }
849
850 /* Set Default PHY parameters if command is supported */
851 if (hdev->commands[35] & 0x20) {
852 struct hci_cp_le_set_default_phy cp;
853
854 cp.all_phys = 0x00;
855 cp.tx_phys = hdev->le_tx_def_phys;
856 cp.rx_phys = hdev->le_rx_def_phys;
857
858 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
859 }
860
861 return 0;
862}
863
864static int __hci_init(struct hci_dev *hdev)
865{
866 int err;
867
868 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
869 if (err < 0)
870 return err;
871
872 if (hci_dev_test_flag(hdev, HCI_SETUP))
873 hci_debugfs_create_basic(hdev);
874
875 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
876 if (err < 0)
877 return err;
878
879 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
880 * BR/EDR/LE type controllers. AMP controllers only need the
881 * first two stages of init.
882 */
883 if (hdev->dev_type != HCI_PRIMARY)
884 return 0;
885
886 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
887 if (err < 0)
888 return err;
889
890 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
891 if (err < 0)
892 return err;
893
894 /* This function is only called when the controller is actually in
895 * configured state. When the controller is marked as unconfigured,
896 * this initialization procedure is not run.
897 *
898 * It means that it is possible that a controller runs through its
899 * setup phase and then discovers missing settings. If that is the
900 * case, then this function will not be called. It then will only
901 * be called during the config phase.
902 *
903 * So only when in setup phase or config phase, create the debugfs
904 * entries and register the SMP channels.
905 */
906 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
907 !hci_dev_test_flag(hdev, HCI_CONFIG))
908 return 0;
909
910 hci_debugfs_create_common(hdev);
911
912 if (lmp_bredr_capable(hdev))
913 hci_debugfs_create_bredr(hdev);
914
915 if (lmp_le_capable(hdev))
916 hci_debugfs_create_le(hdev);
917
918 return 0;
919}
920
921static int hci_init0_req(struct hci_request *req, unsigned long opt)
922{
923 struct hci_dev *hdev = req->hdev;
924
925 BT_DBG("%s %ld", hdev->name, opt);
926
927 /* Reset */
928 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
929 hci_reset_req(req, 0);
930
931 /* Read Local Version */
932 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
933
934 /* Read BD Address */
935 if (hdev->set_bdaddr)
936 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
937
938 return 0;
939}
940
941static int __hci_unconf_init(struct hci_dev *hdev)
942{
943 int err;
944
945 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
946 return 0;
947
948 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
949 if (err < 0)
950 return err;
951
952 if (hci_dev_test_flag(hdev, HCI_SETUP))
953 hci_debugfs_create_basic(hdev);
954
955 return 0;
956}
957
958static int hci_scan_req(struct hci_request *req, unsigned long opt)
959{
960 __u8 scan = opt;
961
962 BT_DBG("%s %x", req->hdev->name, scan);
963
964 /* Inquiry and Page scans */
965 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
966 return 0;
967}
968
969static int hci_auth_req(struct hci_request *req, unsigned long opt)
970{
971 __u8 auth = opt;
972
973 BT_DBG("%s %x", req->hdev->name, auth);
974
975 /* Authentication */
976 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
977 return 0;
978}
979
980static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
981{
982 __u8 encrypt = opt;
983
984 BT_DBG("%s %x", req->hdev->name, encrypt);
985
986 /* Encryption */
987 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
988 return 0;
989}
990
991static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
992{
993 __le16 policy = cpu_to_le16(opt);
994
995 BT_DBG("%s %x", req->hdev->name, policy);
996
997 /* Default link policy */
998 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
999 return 0;
1000}
1001
1002/* Get HCI device by index.
1003 * Device is held on return. */
1004struct hci_dev *hci_dev_get(int index)
1005{
1006 struct hci_dev *hdev = NULL, *d;
1007
1008 BT_DBG("%d", index);
1009
1010 if (index < 0)
1011 return NULL;
1012
1013 read_lock(&hci_dev_list_lock);
1014 list_for_each_entry(d, &hci_dev_list, list) {
1015 if (d->id == index) {
1016 hdev = hci_dev_hold(d);
1017 break;
1018 }
1019 }
1020 read_unlock(&hci_dev_list_lock);
1021 return hdev;
1022}
1023
1024/* ---- Inquiry support ---- */
1025
1026bool hci_discovery_active(struct hci_dev *hdev)
1027{
1028 struct discovery_state *discov = &hdev->discovery;
1029
1030 switch (discov->state) {
1031 case DISCOVERY_FINDING:
1032 case DISCOVERY_RESOLVING:
1033 return true;
1034
1035 default:
1036 return false;
1037 }
1038}
1039
1040void hci_discovery_set_state(struct hci_dev *hdev, int state)
1041{
1042 int old_state = hdev->discovery.state;
1043
1044 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1045
1046 if (old_state == state)
1047 return;
1048
1049 hdev->discovery.state = state;
1050
1051 switch (state) {
1052 case DISCOVERY_STOPPED:
1053 hci_update_background_scan(hdev);
1054
1055 if (old_state != DISCOVERY_STARTING)
1056 mgmt_discovering(hdev, 0);
1057 break;
1058 case DISCOVERY_STARTING:
1059 break;
1060 case DISCOVERY_FINDING:
1061 mgmt_discovering(hdev, 1);
1062 break;
1063 case DISCOVERY_RESOLVING:
1064 break;
1065 case DISCOVERY_STOPPING:
1066 break;
1067 }
1068}
1069
1070void hci_inquiry_cache_flush(struct hci_dev *hdev)
1071{
1072 struct discovery_state *cache = &hdev->discovery;
1073 struct inquiry_entry *p, *n;
1074
1075 list_for_each_entry_safe(p, n, &cache->all, all) {
1076 list_del(&p->all);
1077 kfree(p);
1078 }
1079
1080 INIT_LIST_HEAD(&cache->unknown);
1081 INIT_LIST_HEAD(&cache->resolve);
1082}
1083
1084struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1085 bdaddr_t *bdaddr)
1086{
1087 struct discovery_state *cache = &hdev->discovery;
1088 struct inquiry_entry *e;
1089
1090 BT_DBG("cache %p, %pMR", cache, bdaddr);
1091
1092 list_for_each_entry(e, &cache->all, all) {
1093 if (!bacmp(&e->data.bdaddr, bdaddr))
1094 return e;
1095 }
1096
1097 return NULL;
1098}
1099
1100struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1101 bdaddr_t *bdaddr)
1102{
1103 struct discovery_state *cache = &hdev->discovery;
1104 struct inquiry_entry *e;
1105
1106 BT_DBG("cache %p, %pMR", cache, bdaddr);
1107
1108 list_for_each_entry(e, &cache->unknown, list) {
1109 if (!bacmp(&e->data.bdaddr, bdaddr))
1110 return e;
1111 }
1112
1113 return NULL;
1114}
1115
1116struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1117 bdaddr_t *bdaddr,
1118 int state)
1119{
1120 struct discovery_state *cache = &hdev->discovery;
1121 struct inquiry_entry *e;
1122
1123 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1124
1125 list_for_each_entry(e, &cache->resolve, list) {
1126 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1127 return e;
1128 if (!bacmp(&e->data.bdaddr, bdaddr))
1129 return e;
1130 }
1131
1132 return NULL;
1133}
1134
1135void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1136 struct inquiry_entry *ie)
1137{
1138 struct discovery_state *cache = &hdev->discovery;
1139 struct list_head *pos = &cache->resolve;
1140 struct inquiry_entry *p;
1141
1142 list_del(&ie->list);
1143
1144 list_for_each_entry(p, &cache->resolve, list) {
1145 if (p->name_state != NAME_PENDING &&
1146 abs(p->data.rssi) >= abs(ie->data.rssi))
1147 break;
1148 pos = &p->list;
1149 }
1150
1151 list_add(&ie->list, pos);
1152}
1153
1154u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1155 bool name_known)
1156{
1157 struct discovery_state *cache = &hdev->discovery;
1158 struct inquiry_entry *ie;
1159 u32 flags = 0;
1160
1161 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1162
1163 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1164
1165 if (!data->ssp_mode)
1166 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1167
1168 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1169 if (ie) {
1170 if (!ie->data.ssp_mode)
1171 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1172
1173 if (ie->name_state == NAME_NEEDED &&
1174 data->rssi != ie->data.rssi) {
1175 ie->data.rssi = data->rssi;
1176 hci_inquiry_cache_update_resolve(hdev, ie);
1177 }
1178
1179 goto update;
1180 }
1181
1182 /* Entry not in the cache. Add new one. */
1183 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1184 if (!ie) {
1185 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1186 goto done;
1187 }
1188
1189 list_add(&ie->all, &cache->all);
1190
1191 if (name_known) {
1192 ie->name_state = NAME_KNOWN;
1193 } else {
1194 ie->name_state = NAME_NOT_KNOWN;
1195 list_add(&ie->list, &cache->unknown);
1196 }
1197
1198update:
1199 if (name_known && ie->name_state != NAME_KNOWN &&
1200 ie->name_state != NAME_PENDING) {
1201 ie->name_state = NAME_KNOWN;
1202 list_del(&ie->list);
1203 }
1204
1205 memcpy(&ie->data, data, sizeof(*data));
1206 ie->timestamp = jiffies;
1207 cache->timestamp = jiffies;
1208
1209 if (ie->name_state == NAME_NOT_KNOWN)
1210 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1211
1212done:
1213 return flags;
1214}
1215
1216static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1217{
1218 struct discovery_state *cache = &hdev->discovery;
1219 struct inquiry_info *info = (struct inquiry_info *) buf;
1220 struct inquiry_entry *e;
1221 int copied = 0;
1222
1223 list_for_each_entry(e, &cache->all, all) {
1224 struct inquiry_data *data = &e->data;
1225
1226 if (copied >= num)
1227 break;
1228
1229 bacpy(&info->bdaddr, &data->bdaddr);
1230 info->pscan_rep_mode = data->pscan_rep_mode;
1231 info->pscan_period_mode = data->pscan_period_mode;
1232 info->pscan_mode = data->pscan_mode;
1233 memcpy(info->dev_class, data->dev_class, 3);
1234 info->clock_offset = data->clock_offset;
1235
1236 info++;
1237 copied++;
1238 }
1239
1240 BT_DBG("cache %p, copied %d", cache, copied);
1241 return copied;
1242}
1243
1244static int hci_inq_req(struct hci_request *req, unsigned long opt)
1245{
1246 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1247 struct hci_dev *hdev = req->hdev;
1248 struct hci_cp_inquiry cp;
1249
1250 BT_DBG("%s", hdev->name);
1251
1252 if (test_bit(HCI_INQUIRY, &hdev->flags))
1253 return 0;
1254
1255 /* Start Inquiry */
1256 memcpy(&cp.lap, &ir->lap, 3);
1257 cp.length = ir->length;
1258 cp.num_rsp = ir->num_rsp;
1259 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1260
1261 return 0;
1262}
1263
1264int hci_inquiry(void __user *arg)
1265{
1266 __u8 __user *ptr = arg;
1267 struct hci_inquiry_req ir;
1268 struct hci_dev *hdev;
1269 int err = 0, do_inquiry = 0, max_rsp;
1270 long timeo;
1271 __u8 *buf;
1272
1273 if (copy_from_user(&ir, ptr, sizeof(ir)))
1274 return -EFAULT;
1275
1276 hdev = hci_dev_get(ir.dev_id);
1277 if (!hdev)
1278 return -ENODEV;
1279
1280 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1281 err = -EBUSY;
1282 goto done;
1283 }
1284
1285 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1286 err = -EOPNOTSUPP;
1287 goto done;
1288 }
1289
1290 if (hdev->dev_type != HCI_PRIMARY) {
1291 err = -EOPNOTSUPP;
1292 goto done;
1293 }
1294
1295 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1296 err = -EOPNOTSUPP;
1297 goto done;
1298 }
1299
1300 hci_dev_lock(hdev);
1301 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1302 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1303 hci_inquiry_cache_flush(hdev);
1304 do_inquiry = 1;
1305 }
1306 hci_dev_unlock(hdev);
1307
1308 timeo = ir.length * msecs_to_jiffies(2000);
1309
1310 if (do_inquiry) {
1311 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1312 timeo, NULL);
1313 if (err < 0)
1314 goto done;
1315
1316 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1317 * cleared). If it is interrupted by a signal, return -EINTR.
1318 */
1319 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1320 TASK_INTERRUPTIBLE))
1321 return -EINTR;
1322 }
1323
1324 /* for unlimited number of responses we will use buffer with
1325 * 255 entries
1326 */
1327 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1328
1329 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1330 * copy it to the user space.
1331 */
1332 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1333 if (!buf) {
1334 err = -ENOMEM;
1335 goto done;
1336 }
1337
1338 hci_dev_lock(hdev);
1339 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1340 hci_dev_unlock(hdev);
1341
1342 BT_DBG("num_rsp %d", ir.num_rsp);
1343
1344 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1345 ptr += sizeof(ir);
1346 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1347 ir.num_rsp))
1348 err = -EFAULT;
1349 } else
1350 err = -EFAULT;
1351
1352 kfree(buf);
1353
1354done:
1355 hci_dev_put(hdev);
1356 return err;
1357}
1358
1359/**
1360 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
1361 * (BD_ADDR) for a HCI device from
1362 * a firmware node property.
1363 * @hdev: The HCI device
1364 *
1365 * Search the firmware node for 'local-bd-address'.
1366 *
1367 * All-zero BD addresses are rejected, because those could be properties
1368 * that exist in the firmware tables, but were not updated by the firmware. For
1369 * example, the DTS could define 'local-bd-address', with zero BD addresses.
1370 */
1371static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
1372{
1373 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
1374 bdaddr_t ba;
1375 int ret;
1376
1377 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
1378 (u8 *)&ba, sizeof(ba));
1379 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
1380 return;
1381
1382 bacpy(&hdev->public_addr, &ba);
1383}
1384
1385static int hci_dev_do_open(struct hci_dev *hdev)
1386{
1387 int ret = 0;
1388
1389 BT_DBG("%s %p", hdev->name, hdev);
1390
1391 hci_req_sync_lock(hdev);
1392
1393 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1394 ret = -ENODEV;
1395 goto done;
1396 }
1397
1398 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1399 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1400 /* Check for rfkill but allow the HCI setup stage to
1401 * proceed (which in itself doesn't cause any RF activity).
1402 */
1403 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1404 ret = -ERFKILL;
1405 goto done;
1406 }
1407
1408 /* Check for valid public address or a configured static
1409 * random adddress, but let the HCI setup proceed to
1410 * be able to determine if there is a public address
1411 * or not.
1412 *
1413 * In case of user channel usage, it is not important
1414 * if a public address or static random address is
1415 * available.
1416 *
1417 * This check is only valid for BR/EDR controllers
1418 * since AMP controllers do not have an address.
1419 */
1420 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1421 hdev->dev_type == HCI_PRIMARY &&
1422 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1423 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1424 ret = -EADDRNOTAVAIL;
1425 goto done;
1426 }
1427 }
1428
1429 if (test_bit(HCI_UP, &hdev->flags)) {
1430 ret = -EALREADY;
1431 goto done;
1432 }
1433
1434 if (hdev->open(hdev)) {
1435 ret = -EIO;
1436 goto done;
1437 }
1438
1439 set_bit(HCI_RUNNING, &hdev->flags);
1440 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1441
1442 atomic_set(&hdev->cmd_cnt, 1);
1443 set_bit(HCI_INIT, &hdev->flags);
1444
1445 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1446 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1447 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1448
1449 if (hdev->setup)
1450 ret = hdev->setup(hdev);
1451
1452 if (ret)
1453 goto setup_failed;
1454
1455 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
1456 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
1457 hci_dev_get_bd_addr_from_property(hdev);
1458
1459 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1460 hdev->set_bdaddr)
1461 ret = hdev->set_bdaddr(hdev,
1462 &hdev->public_addr);
1463 }
1464
1465setup_failed:
1466 /* The transport driver can set these quirks before
1467 * creating the HCI device or in its setup callback.
1468 *
1469 * In case any of them is set, the controller has to
1470 * start up as unconfigured.
1471 */
1472 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1473 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1474 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1475
1476 /* For an unconfigured controller it is required to
1477 * read at least the version information provided by
1478 * the Read Local Version Information command.
1479 *
1480 * If the set_bdaddr driver callback is provided, then
1481 * also the original Bluetooth public device address
1482 * will be read using the Read BD Address command.
1483 */
1484 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1485 ret = __hci_unconf_init(hdev);
1486 }
1487
1488 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1489 /* If public address change is configured, ensure that
1490 * the address gets programmed. If the driver does not
1491 * support changing the public address, fail the power
1492 * on procedure.
1493 */
1494 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1495 hdev->set_bdaddr)
1496 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1497 else
1498 ret = -EADDRNOTAVAIL;
1499 }
1500
1501 if (!ret) {
1502 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1503 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1504 ret = __hci_init(hdev);
1505 if (!ret && hdev->post_init)
1506 ret = hdev->post_init(hdev);
1507 }
1508 }
1509
1510 /* If the HCI Reset command is clearing all diagnostic settings,
1511 * then they need to be reprogrammed after the init procedure
1512 * completed.
1513 */
1514 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1515 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1516 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1517 ret = hdev->set_diag(hdev, true);
1518
1519 clear_bit(HCI_INIT, &hdev->flags);
1520
1521 if (!ret) {
1522 hci_dev_hold(hdev);
1523 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1524 hci_adv_instances_set_rpa_expired(hdev, true);
1525 set_bit(HCI_UP, &hdev->flags);
1526 hci_sock_dev_event(hdev, HCI_DEV_UP);
1527 hci_leds_update_powered(hdev, true);
1528 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1529 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1530 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1531 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1532 hci_dev_test_flag(hdev, HCI_MGMT) &&
1533 hdev->dev_type == HCI_PRIMARY) {
1534 ret = __hci_req_hci_power_on(hdev);
1535 mgmt_power_on(hdev, ret);
1536 }
1537 } else {
1538 /* Init failed, cleanup */
1539 flush_work(&hdev->tx_work);
1540 flush_work(&hdev->cmd_work);
1541 flush_work(&hdev->rx_work);
1542
1543 skb_queue_purge(&hdev->cmd_q);
1544 skb_queue_purge(&hdev->rx_q);
1545
1546 if (hdev->flush)
1547 hdev->flush(hdev);
1548
1549 if (hdev->sent_cmd) {
1550 kfree_skb(hdev->sent_cmd);
1551 hdev->sent_cmd = NULL;
1552 }
1553
1554 clear_bit(HCI_RUNNING, &hdev->flags);
1555 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1556
1557 hdev->close(hdev);
1558 hdev->flags &= BIT(HCI_RAW);
1559 }
1560
1561done:
1562 hci_req_sync_unlock(hdev);
1563 return ret;
1564}
1565
1566/* ---- HCI ioctl helpers ---- */
1567
1568int hci_dev_open(__u16 dev)
1569{
1570 struct hci_dev *hdev;
1571 int err;
1572
1573 hdev = hci_dev_get(dev);
1574 if (!hdev)
1575 return -ENODEV;
1576
1577 /* Devices that are marked as unconfigured can only be powered
1578 * up as user channel. Trying to bring them up as normal devices
1579 * will result into a failure. Only user channel operation is
1580 * possible.
1581 *
1582 * When this function is called for a user channel, the flag
1583 * HCI_USER_CHANNEL will be set first before attempting to
1584 * open the device.
1585 */
1586 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1587 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1588 err = -EOPNOTSUPP;
1589 goto done;
1590 }
1591
1592 /* We need to ensure that no other power on/off work is pending
1593 * before proceeding to call hci_dev_do_open. This is
1594 * particularly important if the setup procedure has not yet
1595 * completed.
1596 */
1597 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1598 cancel_delayed_work(&hdev->power_off);
1599
1600 /* After this call it is guaranteed that the setup procedure
1601 * has finished. This means that error conditions like RFKILL
1602 * or no valid public or static random address apply.
1603 */
1604 flush_workqueue(hdev->req_workqueue);
1605
1606 /* For controllers not using the management interface and that
1607 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1608 * so that pairing works for them. Once the management interface
1609 * is in use this bit will be cleared again and userspace has
1610 * to explicitly enable it.
1611 */
1612 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1613 !hci_dev_test_flag(hdev, HCI_MGMT))
1614 hci_dev_set_flag(hdev, HCI_BONDABLE);
1615
1616 err = hci_dev_do_open(hdev);
1617
1618done:
1619 hci_dev_put(hdev);
1620 return err;
1621}
1622
1623/* This function requires the caller holds hdev->lock */
1624static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1625{
1626 struct hci_conn_params *p;
1627
1628 list_for_each_entry(p, &hdev->le_conn_params, list) {
1629 if (p->conn) {
1630 hci_conn_drop(p->conn);
1631 hci_conn_put(p->conn);
1632 p->conn = NULL;
1633 }
1634 list_del_init(&p->action);
1635 }
1636
1637 BT_DBG("All LE pending actions cleared");
1638}
1639
1640int hci_dev_do_close(struct hci_dev *hdev)
1641{
1642 bool auto_off;
1643
1644 BT_DBG("%s %p", hdev->name, hdev);
1645
1646 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1647 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1648 test_bit(HCI_UP, &hdev->flags)) {
1649 /* Execute vendor specific shutdown routine */
1650 if (hdev->shutdown)
1651 hdev->shutdown(hdev);
1652 }
1653
1654 cancel_delayed_work(&hdev->power_off);
1655
1656 hci_request_cancel_all(hdev);
1657 hci_req_sync_lock(hdev);
1658
1659 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1660 cancel_delayed_work_sync(&hdev->cmd_timer);
1661 hci_req_sync_unlock(hdev);
1662 return 0;
1663 }
1664
1665 hci_leds_update_powered(hdev, false);
1666
1667 /* Flush RX and TX works */
1668 flush_work(&hdev->tx_work);
1669 flush_work(&hdev->rx_work);
1670
1671 if (hdev->discov_timeout > 0) {
1672 hdev->discov_timeout = 0;
1673 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1674 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1675 }
1676
1677 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1678 cancel_delayed_work(&hdev->service_cache);
1679
1680 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
1681 struct adv_info *adv_instance;
1682
1683 cancel_delayed_work_sync(&hdev->rpa_expired);
1684
1685 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
1686 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1687 }
1688
1689 /* Avoid potential lockdep warnings from the *_flush() calls by
1690 * ensuring the workqueue is empty up front.
1691 */
1692 drain_workqueue(hdev->workqueue);
1693
1694 hci_dev_lock(hdev);
1695
1696 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1697
1698 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1699
1700 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1701 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1702 hci_dev_test_flag(hdev, HCI_MGMT))
1703 __mgmt_power_off(hdev);
1704
1705 hci_inquiry_cache_flush(hdev);
1706 hci_pend_le_actions_clear(hdev);
1707 hci_conn_hash_flush(hdev);
1708 hci_dev_unlock(hdev);
1709
1710 smp_unregister(hdev);
1711
1712 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1713
1714 if (hdev->flush)
1715 hdev->flush(hdev);
1716
1717 /* Reset device */
1718 skb_queue_purge(&hdev->cmd_q);
1719 atomic_set(&hdev->cmd_cnt, 1);
1720 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1721 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1722 set_bit(HCI_INIT, &hdev->flags);
1723 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1724 clear_bit(HCI_INIT, &hdev->flags);
1725 }
1726
1727 /* flush cmd work */
1728 flush_work(&hdev->cmd_work);
1729
1730 /* Drop queues */
1731 skb_queue_purge(&hdev->rx_q);
1732 skb_queue_purge(&hdev->cmd_q);
1733 skb_queue_purge(&hdev->raw_q);
1734
1735 /* Drop last sent command */
1736 if (hdev->sent_cmd) {
1737 cancel_delayed_work_sync(&hdev->cmd_timer);
1738 kfree_skb(hdev->sent_cmd);
1739 hdev->sent_cmd = NULL;
1740 }
1741
1742 clear_bit(HCI_RUNNING, &hdev->flags);
1743 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1744
1745 /* After this point our queues are empty
1746 * and no tasks are scheduled. */
1747 hdev->close(hdev);
1748
1749 /* Clear flags */
1750 hdev->flags &= BIT(HCI_RAW);
1751 hci_dev_clear_volatile_flags(hdev);
1752
1753 /* Controller radio is available but is currently powered down */
1754 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1755
1756 memset(hdev->eir, 0, sizeof(hdev->eir));
1757 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1758 bacpy(&hdev->random_addr, BDADDR_ANY);
1759
1760 hci_req_sync_unlock(hdev);
1761
1762 hci_dev_put(hdev);
1763 return 0;
1764}
1765
1766int hci_dev_close(__u16 dev)
1767{
1768 struct hci_dev *hdev;
1769 int err;
1770
1771 hdev = hci_dev_get(dev);
1772 if (!hdev)
1773 return -ENODEV;
1774
1775 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1776 err = -EBUSY;
1777 goto done;
1778 }
1779
1780 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1781 cancel_delayed_work(&hdev->power_off);
1782
1783 err = hci_dev_do_close(hdev);
1784
1785done:
1786 hci_dev_put(hdev);
1787 return err;
1788}
1789
1790static int hci_dev_do_reset(struct hci_dev *hdev)
1791{
1792 int ret;
1793
1794 BT_DBG("%s %p", hdev->name, hdev);
1795
1796 hci_req_sync_lock(hdev);
1797
1798 /* Drop queues */
1799 skb_queue_purge(&hdev->rx_q);
1800 skb_queue_purge(&hdev->cmd_q);
1801
1802 /* Avoid potential lockdep warnings from the *_flush() calls by
1803 * ensuring the workqueue is empty up front.
1804 */
1805 drain_workqueue(hdev->workqueue);
1806
1807 hci_dev_lock(hdev);
1808 hci_inquiry_cache_flush(hdev);
1809 hci_conn_hash_flush(hdev);
1810 hci_dev_unlock(hdev);
1811
1812 if (hdev->flush)
1813 hdev->flush(hdev);
1814
1815 atomic_set(&hdev->cmd_cnt, 1);
1816 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1817
1818 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1819
1820 hci_req_sync_unlock(hdev);
1821 return ret;
1822}
1823
1824int hci_dev_reset(__u16 dev)
1825{
1826 struct hci_dev *hdev;
1827 int err;
1828
1829 hdev = hci_dev_get(dev);
1830 if (!hdev)
1831 return -ENODEV;
1832
1833 if (!test_bit(HCI_UP, &hdev->flags)) {
1834 err = -ENETDOWN;
1835 goto done;
1836 }
1837
1838 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1839 err = -EBUSY;
1840 goto done;
1841 }
1842
1843 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1844 err = -EOPNOTSUPP;
1845 goto done;
1846 }
1847
1848 err = hci_dev_do_reset(hdev);
1849
1850done:
1851 hci_dev_put(hdev);
1852 return err;
1853}
1854
1855int hci_dev_reset_stat(__u16 dev)
1856{
1857 struct hci_dev *hdev;
1858 int ret = 0;
1859
1860 hdev = hci_dev_get(dev);
1861 if (!hdev)
1862 return -ENODEV;
1863
1864 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1865 ret = -EBUSY;
1866 goto done;
1867 }
1868
1869 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1870 ret = -EOPNOTSUPP;
1871 goto done;
1872 }
1873
1874 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1875
1876done:
1877 hci_dev_put(hdev);
1878 return ret;
1879}
1880
1881static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1882{
1883 bool conn_changed, discov_changed;
1884
1885 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1886
1887 if ((scan & SCAN_PAGE))
1888 conn_changed = !hci_dev_test_and_set_flag(hdev,
1889 HCI_CONNECTABLE);
1890 else
1891 conn_changed = hci_dev_test_and_clear_flag(hdev,
1892 HCI_CONNECTABLE);
1893
1894 if ((scan & SCAN_INQUIRY)) {
1895 discov_changed = !hci_dev_test_and_set_flag(hdev,
1896 HCI_DISCOVERABLE);
1897 } else {
1898 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1899 discov_changed = hci_dev_test_and_clear_flag(hdev,
1900 HCI_DISCOVERABLE);
1901 }
1902
1903 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1904 return;
1905
1906 if (conn_changed || discov_changed) {
1907 /* In case this was disabled through mgmt */
1908 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1909
1910 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1911 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1912
1913 mgmt_new_settings(hdev);
1914 }
1915}
1916
1917int hci_dev_cmd(unsigned int cmd, void __user *arg)
1918{
1919 struct hci_dev *hdev;
1920 struct hci_dev_req dr;
1921 int err = 0;
1922
1923 if (copy_from_user(&dr, arg, sizeof(dr)))
1924 return -EFAULT;
1925
1926 hdev = hci_dev_get(dr.dev_id);
1927 if (!hdev)
1928 return -ENODEV;
1929
1930 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1931 err = -EBUSY;
1932 goto done;
1933 }
1934
1935 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1936 err = -EOPNOTSUPP;
1937 goto done;
1938 }
1939
1940 if (hdev->dev_type != HCI_PRIMARY) {
1941 err = -EOPNOTSUPP;
1942 goto done;
1943 }
1944
1945 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1946 err = -EOPNOTSUPP;
1947 goto done;
1948 }
1949
1950 switch (cmd) {
1951 case HCISETAUTH:
1952 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1953 HCI_INIT_TIMEOUT, NULL);
1954 break;
1955
1956 case HCISETENCRYPT:
1957 if (!lmp_encrypt_capable(hdev)) {
1958 err = -EOPNOTSUPP;
1959 break;
1960 }
1961
1962 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1963 /* Auth must be enabled first */
1964 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1965 HCI_INIT_TIMEOUT, NULL);
1966 if (err)
1967 break;
1968 }
1969
1970 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1971 HCI_INIT_TIMEOUT, NULL);
1972 break;
1973
1974 case HCISETSCAN:
1975 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1976 HCI_INIT_TIMEOUT, NULL);
1977
1978 /* Ensure that the connectable and discoverable states
1979 * get correctly modified as this was a non-mgmt change.
1980 */
1981 if (!err)
1982 hci_update_scan_state(hdev, dr.dev_opt);
1983 break;
1984
1985 case HCISETLINKPOL:
1986 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1987 HCI_INIT_TIMEOUT, NULL);
1988 break;
1989
1990 case HCISETLINKMODE:
1991 hdev->link_mode = ((__u16) dr.dev_opt) &
1992 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1993 break;
1994
1995 case HCISETPTYPE:
1996 if (hdev->pkt_type == (__u16) dr.dev_opt)
1997 break;
1998
1999 hdev->pkt_type = (__u16) dr.dev_opt;
2000 mgmt_phy_configuration_changed(hdev, NULL);
2001 break;
2002
2003 case HCISETACLMTU:
2004 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2005 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2006 break;
2007
2008 case HCISETSCOMTU:
2009 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2010 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2011 break;
2012
2013 default:
2014 err = -EINVAL;
2015 break;
2016 }
2017
2018done:
2019 hci_dev_put(hdev);
2020 return err;
2021}
2022
2023int hci_get_dev_list(void __user *arg)
2024{
2025 struct hci_dev *hdev;
2026 struct hci_dev_list_req *dl;
2027 struct hci_dev_req *dr;
2028 int n = 0, size, err;
2029 __u16 dev_num;
2030
2031 if (get_user(dev_num, (__u16 __user *) arg))
2032 return -EFAULT;
2033
2034 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2035 return -EINVAL;
2036
2037 size = sizeof(*dl) + dev_num * sizeof(*dr);
2038
2039 dl = kzalloc(size, GFP_KERNEL);
2040 if (!dl)
2041 return -ENOMEM;
2042
2043 dr = dl->dev_req;
2044
2045 read_lock(&hci_dev_list_lock);
2046 list_for_each_entry(hdev, &hci_dev_list, list) {
2047 unsigned long flags = hdev->flags;
2048
2049 /* When the auto-off is configured it means the transport
2050 * is running, but in that case still indicate that the
2051 * device is actually down.
2052 */
2053 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2054 flags &= ~BIT(HCI_UP);
2055
2056 (dr + n)->dev_id = hdev->id;
2057 (dr + n)->dev_opt = flags;
2058
2059 if (++n >= dev_num)
2060 break;
2061 }
2062 read_unlock(&hci_dev_list_lock);
2063
2064 dl->dev_num = n;
2065 size = sizeof(*dl) + n * sizeof(*dr);
2066
2067 err = copy_to_user(arg, dl, size);
2068 kfree(dl);
2069
2070 return err ? -EFAULT : 0;
2071}
2072
2073int hci_get_dev_info(void __user *arg)
2074{
2075 struct hci_dev *hdev;
2076 struct hci_dev_info di;
2077 unsigned long flags;
2078 int err = 0;
2079
2080 if (copy_from_user(&di, arg, sizeof(di)))
2081 return -EFAULT;
2082
2083 hdev = hci_dev_get(di.dev_id);
2084 if (!hdev)
2085 return -ENODEV;
2086
2087 /* When the auto-off is configured it means the transport
2088 * is running, but in that case still indicate that the
2089 * device is actually down.
2090 */
2091 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2092 flags = hdev->flags & ~BIT(HCI_UP);
2093 else
2094 flags = hdev->flags;
2095
2096 strcpy(di.name, hdev->name);
2097 di.bdaddr = hdev->bdaddr;
2098 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2099 di.flags = flags;
2100 di.pkt_type = hdev->pkt_type;
2101 if (lmp_bredr_capable(hdev)) {
2102 di.acl_mtu = hdev->acl_mtu;
2103 di.acl_pkts = hdev->acl_pkts;
2104 di.sco_mtu = hdev->sco_mtu;
2105 di.sco_pkts = hdev->sco_pkts;
2106 } else {
2107 di.acl_mtu = hdev->le_mtu;
2108 di.acl_pkts = hdev->le_pkts;
2109 di.sco_mtu = 0;
2110 di.sco_pkts = 0;
2111 }
2112 di.link_policy = hdev->link_policy;
2113 di.link_mode = hdev->link_mode;
2114
2115 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2116 memcpy(&di.features, &hdev->features, sizeof(di.features));
2117
2118 if (copy_to_user(arg, &di, sizeof(di)))
2119 err = -EFAULT;
2120
2121 hci_dev_put(hdev);
2122
2123 return err;
2124}
2125
2126/* ---- Interface to HCI drivers ---- */
2127
2128static int hci_rfkill_set_block(void *data, bool blocked)
2129{
2130 struct hci_dev *hdev = data;
2131
2132 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2133
2134 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2135 return -EBUSY;
2136
2137 if (blocked) {
2138 hci_dev_set_flag(hdev, HCI_RFKILLED);
2139 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2140 !hci_dev_test_flag(hdev, HCI_CONFIG))
2141 hci_dev_do_close(hdev);
2142 } else {
2143 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2144 }
2145
2146 return 0;
2147}
2148
2149static const struct rfkill_ops hci_rfkill_ops = {
2150 .set_block = hci_rfkill_set_block,
2151};
2152
2153static void hci_power_on(struct work_struct *work)
2154{
2155 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2156 int err;
2157
2158 BT_DBG("%s", hdev->name);
2159
2160 if (test_bit(HCI_UP, &hdev->flags) &&
2161 hci_dev_test_flag(hdev, HCI_MGMT) &&
2162 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2163 cancel_delayed_work(&hdev->power_off);
2164 hci_req_sync_lock(hdev);
2165 err = __hci_req_hci_power_on(hdev);
2166 hci_req_sync_unlock(hdev);
2167 mgmt_power_on(hdev, err);
2168 return;
2169 }
2170
2171 err = hci_dev_do_open(hdev);
2172 if (err < 0) {
2173 hci_dev_lock(hdev);
2174 mgmt_set_powered_failed(hdev, err);
2175 hci_dev_unlock(hdev);
2176 return;
2177 }
2178
2179 /* During the HCI setup phase, a few error conditions are
2180 * ignored and they need to be checked now. If they are still
2181 * valid, it is important to turn the device back off.
2182 */
2183 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2184 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2185 (hdev->dev_type == HCI_PRIMARY &&
2186 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2187 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2188 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2189 hci_dev_do_close(hdev);
2190 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2191 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2192 HCI_AUTO_OFF_TIMEOUT);
2193 }
2194
2195 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2196 /* For unconfigured devices, set the HCI_RAW flag
2197 * so that userspace can easily identify them.
2198 */
2199 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2200 set_bit(HCI_RAW, &hdev->flags);
2201
2202 /* For fully configured devices, this will send
2203 * the Index Added event. For unconfigured devices,
2204 * it will send Unconfigued Index Added event.
2205 *
2206 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2207 * and no event will be send.
2208 */
2209 mgmt_index_added(hdev);
2210 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2211 /* When the controller is now configured, then it
2212 * is important to clear the HCI_RAW flag.
2213 */
2214 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2215 clear_bit(HCI_RAW, &hdev->flags);
2216
2217 /* Powering on the controller with HCI_CONFIG set only
2218 * happens with the transition from unconfigured to
2219 * configured. This will send the Index Added event.
2220 */
2221 mgmt_index_added(hdev);
2222 }
2223}
2224
2225static void hci_power_off(struct work_struct *work)
2226{
2227 struct hci_dev *hdev = container_of(work, struct hci_dev,
2228 power_off.work);
2229
2230 BT_DBG("%s", hdev->name);
2231
2232 hci_dev_do_close(hdev);
2233}
2234
2235static void hci_error_reset(struct work_struct *work)
2236{
2237 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2238
2239 BT_DBG("%s", hdev->name);
2240
2241 if (hdev->hw_error)
2242 hdev->hw_error(hdev, hdev->hw_error_code);
2243 else
2244 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2245
2246 if (hci_dev_do_close(hdev))
2247 return;
2248
2249 hci_dev_do_open(hdev);
2250}
2251
2252void hci_uuids_clear(struct hci_dev *hdev)
2253{
2254 struct bt_uuid *uuid, *tmp;
2255
2256 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2257 list_del(&uuid->list);
2258 kfree(uuid);
2259 }
2260}
2261
2262void hci_link_keys_clear(struct hci_dev *hdev)
2263{
2264 struct link_key *key;
2265
2266 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2267 list_del_rcu(&key->list);
2268 kfree_rcu(key, rcu);
2269 }
2270}
2271
2272void hci_smp_ltks_clear(struct hci_dev *hdev)
2273{
2274 struct smp_ltk *k;
2275
2276 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2277 list_del_rcu(&k->list);
2278 kfree_rcu(k, rcu);
2279 }
2280}
2281
2282void hci_smp_irks_clear(struct hci_dev *hdev)
2283{
2284 struct smp_irk *k;
2285
2286 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2287 list_del_rcu(&k->list);
2288 kfree_rcu(k, rcu);
2289 }
2290}
2291
2292struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2293{
2294 struct link_key *k;
2295
2296 rcu_read_lock();
2297 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2298 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2299 rcu_read_unlock();
2300 return k;
2301 }
2302 }
2303 rcu_read_unlock();
2304
2305 return NULL;
2306}
2307
2308static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2309 u8 key_type, u8 old_key_type)
2310{
2311 /* Legacy key */
2312 if (key_type < 0x03)
2313 return true;
2314
2315 /* Debug keys are insecure so don't store them persistently */
2316 if (key_type == HCI_LK_DEBUG_COMBINATION)
2317 return false;
2318
2319 /* Changed combination key and there's no previous one */
2320 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2321 return false;
2322
2323 /* Security mode 3 case */
2324 if (!conn)
2325 return true;
2326
2327 /* BR/EDR key derived using SC from an LE link */
2328 if (conn->type == LE_LINK)
2329 return true;
2330
2331 /* Neither local nor remote side had no-bonding as requirement */
2332 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2333 return true;
2334
2335 /* Local side had dedicated bonding as requirement */
2336 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2337 return true;
2338
2339 /* Remote side had dedicated bonding as requirement */
2340 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2341 return true;
2342
2343 /* If none of the above criteria match, then don't store the key
2344 * persistently */
2345 return false;
2346}
2347
2348static u8 ltk_role(u8 type)
2349{
2350 if (type == SMP_LTK)
2351 return HCI_ROLE_MASTER;
2352
2353 return HCI_ROLE_SLAVE;
2354}
2355
2356struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2357 u8 addr_type, u8 role)
2358{
2359 struct smp_ltk *k;
2360
2361 rcu_read_lock();
2362 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2363 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2364 continue;
2365
2366 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2367 rcu_read_unlock();
2368 return k;
2369 }
2370 }
2371 rcu_read_unlock();
2372
2373 return NULL;
2374}
2375
2376struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2377{
2378 struct smp_irk *irk;
2379
2380 rcu_read_lock();
2381 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2382 if (!bacmp(&irk->rpa, rpa)) {
2383 rcu_read_unlock();
2384 return irk;
2385 }
2386 }
2387
2388 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2389 if (smp_irk_matches(hdev, irk->val, rpa)) {
2390 bacpy(&irk->rpa, rpa);
2391 rcu_read_unlock();
2392 return irk;
2393 }
2394 }
2395 rcu_read_unlock();
2396
2397 return NULL;
2398}
2399
2400struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2401 u8 addr_type)
2402{
2403 struct smp_irk *irk;
2404
2405 /* Identity Address must be public or static random */
2406 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2407 return NULL;
2408
2409 rcu_read_lock();
2410 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2411 if (addr_type == irk->addr_type &&
2412 bacmp(bdaddr, &irk->bdaddr) == 0) {
2413 rcu_read_unlock();
2414 return irk;
2415 }
2416 }
2417 rcu_read_unlock();
2418
2419 return NULL;
2420}
2421
2422struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2423 bdaddr_t *bdaddr, u8 *val, u8 type,
2424 u8 pin_len, bool *persistent)
2425{
2426 struct link_key *key, *old_key;
2427 u8 old_key_type;
2428
2429 old_key = hci_find_link_key(hdev, bdaddr);
2430 if (old_key) {
2431 old_key_type = old_key->type;
2432 key = old_key;
2433 } else {
2434 old_key_type = conn ? conn->key_type : 0xff;
2435 key = kzalloc(sizeof(*key), GFP_KERNEL);
2436 if (!key)
2437 return NULL;
2438 list_add_rcu(&key->list, &hdev->link_keys);
2439 }
2440
2441 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2442
2443 /* Some buggy controller combinations generate a changed
2444 * combination key for legacy pairing even when there's no
2445 * previous key */
2446 if (type == HCI_LK_CHANGED_COMBINATION &&
2447 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2448 type = HCI_LK_COMBINATION;
2449 if (conn)
2450 conn->key_type = type;
2451 }
2452
2453 bacpy(&key->bdaddr, bdaddr);
2454 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2455 key->pin_len = pin_len;
2456
2457 if (type == HCI_LK_CHANGED_COMBINATION)
2458 key->type = old_key_type;
2459 else
2460 key->type = type;
2461
2462 if (persistent)
2463 *persistent = hci_persistent_key(hdev, conn, type,
2464 old_key_type);
2465
2466 return key;
2467}
2468
2469struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2470 u8 addr_type, u8 type, u8 authenticated,
2471 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2472{
2473 struct smp_ltk *key, *old_key;
2474 u8 role = ltk_role(type);
2475
2476 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2477 if (old_key)
2478 key = old_key;
2479 else {
2480 key = kzalloc(sizeof(*key), GFP_KERNEL);
2481 if (!key)
2482 return NULL;
2483 list_add_rcu(&key->list, &hdev->long_term_keys);
2484 }
2485
2486 bacpy(&key->bdaddr, bdaddr);
2487 key->bdaddr_type = addr_type;
2488 memcpy(key->val, tk, sizeof(key->val));
2489 key->authenticated = authenticated;
2490 key->ediv = ediv;
2491 key->rand = rand;
2492 key->enc_size = enc_size;
2493 key->type = type;
2494
2495 return key;
2496}
2497
2498struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2499 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2500{
2501 struct smp_irk *irk;
2502
2503 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2504 if (!irk) {
2505 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2506 if (!irk)
2507 return NULL;
2508
2509 bacpy(&irk->bdaddr, bdaddr);
2510 irk->addr_type = addr_type;
2511
2512 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2513 }
2514
2515 memcpy(irk->val, val, 16);
2516 bacpy(&irk->rpa, rpa);
2517
2518 return irk;
2519}
2520
2521int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2522{
2523 struct link_key *key;
2524
2525 key = hci_find_link_key(hdev, bdaddr);
2526 if (!key)
2527 return -ENOENT;
2528
2529 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2530
2531 list_del_rcu(&key->list);
2532 kfree_rcu(key, rcu);
2533
2534 return 0;
2535}
2536
2537int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2538{
2539 struct smp_ltk *k;
2540 int removed = 0;
2541
2542 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2543 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2544 continue;
2545
2546 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2547
2548 list_del_rcu(&k->list);
2549 kfree_rcu(k, rcu);
2550 removed++;
2551 }
2552
2553 return removed ? 0 : -ENOENT;
2554}
2555
2556void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2557{
2558 struct smp_irk *k;
2559
2560 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2561 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2562 continue;
2563
2564 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2565
2566 list_del_rcu(&k->list);
2567 kfree_rcu(k, rcu);
2568 }
2569}
2570
2571bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2572{
2573 struct smp_ltk *k;
2574 struct smp_irk *irk;
2575 u8 addr_type;
2576
2577 if (type == BDADDR_BREDR) {
2578 if (hci_find_link_key(hdev, bdaddr))
2579 return true;
2580 return false;
2581 }
2582
2583 /* Convert to HCI addr type which struct smp_ltk uses */
2584 if (type == BDADDR_LE_PUBLIC)
2585 addr_type = ADDR_LE_DEV_PUBLIC;
2586 else
2587 addr_type = ADDR_LE_DEV_RANDOM;
2588
2589 irk = hci_get_irk(hdev, bdaddr, addr_type);
2590 if (irk) {
2591 bdaddr = &irk->bdaddr;
2592 addr_type = irk->addr_type;
2593 }
2594
2595 rcu_read_lock();
2596 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2597 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2598 rcu_read_unlock();
2599 return true;
2600 }
2601 }
2602 rcu_read_unlock();
2603
2604 return false;
2605}
2606
2607/* HCI command timer function */
2608static void hci_cmd_timeout(struct work_struct *work)
2609{
2610 struct hci_dev *hdev = container_of(work, struct hci_dev,
2611 cmd_timer.work);
2612
2613 if (hdev->sent_cmd) {
2614 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2615 u16 opcode = __le16_to_cpu(sent->opcode);
2616
2617 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2618 } else {
2619 bt_dev_err(hdev, "command tx timeout");
2620 }
2621
2622 if (hdev->cmd_timeout)
2623 hdev->cmd_timeout(hdev);
2624
2625 atomic_set(&hdev->cmd_cnt, 1);
2626 queue_work(hdev->workqueue, &hdev->cmd_work);
2627}
2628
2629struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2630 bdaddr_t *bdaddr, u8 bdaddr_type)
2631{
2632 struct oob_data *data;
2633
2634 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2635 if (bacmp(bdaddr, &data->bdaddr) != 0)
2636 continue;
2637 if (data->bdaddr_type != bdaddr_type)
2638 continue;
2639 return data;
2640 }
2641
2642 return NULL;
2643}
2644
2645int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2646 u8 bdaddr_type)
2647{
2648 struct oob_data *data;
2649
2650 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2651 if (!data)
2652 return -ENOENT;
2653
2654 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2655
2656 list_del(&data->list);
2657 kfree(data);
2658
2659 return 0;
2660}
2661
2662void hci_remote_oob_data_clear(struct hci_dev *hdev)
2663{
2664 struct oob_data *data, *n;
2665
2666 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2667 list_del(&data->list);
2668 kfree(data);
2669 }
2670}
2671
2672int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2673 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2674 u8 *hash256, u8 *rand256)
2675{
2676 struct oob_data *data;
2677
2678 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2679 if (!data) {
2680 data = kmalloc(sizeof(*data), GFP_KERNEL);
2681 if (!data)
2682 return -ENOMEM;
2683
2684 bacpy(&data->bdaddr, bdaddr);
2685 data->bdaddr_type = bdaddr_type;
2686 list_add(&data->list, &hdev->remote_oob_data);
2687 }
2688
2689 if (hash192 && rand192) {
2690 memcpy(data->hash192, hash192, sizeof(data->hash192));
2691 memcpy(data->rand192, rand192, sizeof(data->rand192));
2692 if (hash256 && rand256)
2693 data->present = 0x03;
2694 } else {
2695 memset(data->hash192, 0, sizeof(data->hash192));
2696 memset(data->rand192, 0, sizeof(data->rand192));
2697 if (hash256 && rand256)
2698 data->present = 0x02;
2699 else
2700 data->present = 0x00;
2701 }
2702
2703 if (hash256 && rand256) {
2704 memcpy(data->hash256, hash256, sizeof(data->hash256));
2705 memcpy(data->rand256, rand256, sizeof(data->rand256));
2706 } else {
2707 memset(data->hash256, 0, sizeof(data->hash256));
2708 memset(data->rand256, 0, sizeof(data->rand256));
2709 if (hash192 && rand192)
2710 data->present = 0x01;
2711 }
2712
2713 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2714
2715 return 0;
2716}
2717
2718/* This function requires the caller holds hdev->lock */
2719struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2720{
2721 struct adv_info *adv_instance;
2722
2723 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2724 if (adv_instance->instance == instance)
2725 return adv_instance;
2726 }
2727
2728 return NULL;
2729}
2730
2731/* This function requires the caller holds hdev->lock */
2732struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2733{
2734 struct adv_info *cur_instance;
2735
2736 cur_instance = hci_find_adv_instance(hdev, instance);
2737 if (!cur_instance)
2738 return NULL;
2739
2740 if (cur_instance == list_last_entry(&hdev->adv_instances,
2741 struct adv_info, list))
2742 return list_first_entry(&hdev->adv_instances,
2743 struct adv_info, list);
2744 else
2745 return list_next_entry(cur_instance, list);
2746}
2747
2748/* This function requires the caller holds hdev->lock */
2749int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2750{
2751 struct adv_info *adv_instance;
2752
2753 adv_instance = hci_find_adv_instance(hdev, instance);
2754 if (!adv_instance)
2755 return -ENOENT;
2756
2757 BT_DBG("%s removing %dMR", hdev->name, instance);
2758
2759 if (hdev->cur_adv_instance == instance) {
2760 if (hdev->adv_instance_timeout) {
2761 cancel_delayed_work(&hdev->adv_instance_expire);
2762 hdev->adv_instance_timeout = 0;
2763 }
2764 hdev->cur_adv_instance = 0x00;
2765 }
2766
2767 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2768
2769 list_del(&adv_instance->list);
2770 kfree(adv_instance);
2771
2772 hdev->adv_instance_cnt--;
2773
2774 return 0;
2775}
2776
2777void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
2778{
2779 struct adv_info *adv_instance, *n;
2780
2781 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
2782 adv_instance->rpa_expired = rpa_expired;
2783}
2784
2785/* This function requires the caller holds hdev->lock */
2786void hci_adv_instances_clear(struct hci_dev *hdev)
2787{
2788 struct adv_info *adv_instance, *n;
2789
2790 if (hdev->adv_instance_timeout) {
2791 cancel_delayed_work(&hdev->adv_instance_expire);
2792 hdev->adv_instance_timeout = 0;
2793 }
2794
2795 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2796 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2797 list_del(&adv_instance->list);
2798 kfree(adv_instance);
2799 }
2800
2801 hdev->adv_instance_cnt = 0;
2802 hdev->cur_adv_instance = 0x00;
2803}
2804
2805static void adv_instance_rpa_expired(struct work_struct *work)
2806{
2807 struct adv_info *adv_instance = container_of(work, struct adv_info,
2808 rpa_expired_cb.work);
2809
2810 BT_DBG("");
2811
2812 adv_instance->rpa_expired = true;
2813}
2814
2815/* This function requires the caller holds hdev->lock */
2816int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2817 u16 adv_data_len, u8 *adv_data,
2818 u16 scan_rsp_len, u8 *scan_rsp_data,
2819 u16 timeout, u16 duration)
2820{
2821 struct adv_info *adv_instance;
2822
2823 adv_instance = hci_find_adv_instance(hdev, instance);
2824 if (adv_instance) {
2825 memset(adv_instance->adv_data, 0,
2826 sizeof(adv_instance->adv_data));
2827 memset(adv_instance->scan_rsp_data, 0,
2828 sizeof(adv_instance->scan_rsp_data));
2829 } else {
2830 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
2831 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2832 return -EOVERFLOW;
2833
2834 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2835 if (!adv_instance)
2836 return -ENOMEM;
2837
2838 adv_instance->pending = true;
2839 adv_instance->instance = instance;
2840 list_add(&adv_instance->list, &hdev->adv_instances);
2841 hdev->adv_instance_cnt++;
2842 }
2843
2844 adv_instance->flags = flags;
2845 adv_instance->adv_data_len = adv_data_len;
2846 adv_instance->scan_rsp_len = scan_rsp_len;
2847
2848 if (adv_data_len)
2849 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2850
2851 if (scan_rsp_len)
2852 memcpy(adv_instance->scan_rsp_data,
2853 scan_rsp_data, scan_rsp_len);
2854
2855 adv_instance->timeout = timeout;
2856 adv_instance->remaining_time = timeout;
2857
2858 if (duration == 0)
2859 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2860 else
2861 adv_instance->duration = duration;
2862
2863 adv_instance->tx_power = HCI_TX_POWER_INVALID;
2864
2865 INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
2866 adv_instance_rpa_expired);
2867
2868 BT_DBG("%s for %dMR", hdev->name, instance);
2869
2870 return 0;
2871}
2872
2873struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2874 bdaddr_t *bdaddr, u8 type)
2875{
2876 struct bdaddr_list *b;
2877
2878 list_for_each_entry(b, bdaddr_list, list) {
2879 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2880 return b;
2881 }
2882
2883 return NULL;
2884}
2885
2886struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2887 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2888 u8 type)
2889{
2890 struct bdaddr_list_with_irk *b;
2891
2892 list_for_each_entry(b, bdaddr_list, list) {
2893 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2894 return b;
2895 }
2896
2897 return NULL;
2898}
2899
2900void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2901{
2902 struct bdaddr_list *b, *n;
2903
2904 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2905 list_del(&b->list);
2906 kfree(b);
2907 }
2908}
2909
2910int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2911{
2912 struct bdaddr_list *entry;
2913
2914 if (!bacmp(bdaddr, BDADDR_ANY))
2915 return -EBADF;
2916
2917 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2918 return -EEXIST;
2919
2920 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2921 if (!entry)
2922 return -ENOMEM;
2923
2924 bacpy(&entry->bdaddr, bdaddr);
2925 entry->bdaddr_type = type;
2926
2927 list_add(&entry->list, list);
2928
2929 return 0;
2930}
2931
2932int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2933 u8 type, u8 *peer_irk, u8 *local_irk)
2934{
2935 struct bdaddr_list_with_irk *entry;
2936
2937 if (!bacmp(bdaddr, BDADDR_ANY))
2938 return -EBADF;
2939
2940 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2941 return -EEXIST;
2942
2943 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2944 if (!entry)
2945 return -ENOMEM;
2946
2947 bacpy(&entry->bdaddr, bdaddr);
2948 entry->bdaddr_type = type;
2949
2950 if (peer_irk)
2951 memcpy(entry->peer_irk, peer_irk, 16);
2952
2953 if (local_irk)
2954 memcpy(entry->local_irk, local_irk, 16);
2955
2956 list_add(&entry->list, list);
2957
2958 return 0;
2959}
2960
2961int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2962{
2963 struct bdaddr_list *entry;
2964
2965 if (!bacmp(bdaddr, BDADDR_ANY)) {
2966 hci_bdaddr_list_clear(list);
2967 return 0;
2968 }
2969
2970 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2971 if (!entry)
2972 return -ENOENT;
2973
2974 list_del(&entry->list);
2975 kfree(entry);
2976
2977 return 0;
2978}
2979
2980int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2981 u8 type)
2982{
2983 struct bdaddr_list_with_irk *entry;
2984
2985 if (!bacmp(bdaddr, BDADDR_ANY)) {
2986 hci_bdaddr_list_clear(list);
2987 return 0;
2988 }
2989
2990 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2991 if (!entry)
2992 return -ENOENT;
2993
2994 list_del(&entry->list);
2995 kfree(entry);
2996
2997 return 0;
2998}
2999
3000/* This function requires the caller holds hdev->lock */
3001struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3002 bdaddr_t *addr, u8 addr_type)
3003{
3004 struct hci_conn_params *params;
3005
3006 list_for_each_entry(params, &hdev->le_conn_params, list) {
3007 if (bacmp(¶ms->addr, addr) == 0 &&
3008 params->addr_type == addr_type) {
3009 return params;
3010 }
3011 }
3012
3013 return NULL;
3014}
3015
3016/* This function requires the caller holds hdev->lock */
3017struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3018 bdaddr_t *addr, u8 addr_type)
3019{
3020 struct hci_conn_params *param;
3021
3022 list_for_each_entry(param, list, action) {
3023 if (bacmp(¶m->addr, addr) == 0 &&
3024 param->addr_type == addr_type)
3025 return param;
3026 }
3027
3028 return NULL;
3029}
3030
3031/* This function requires the caller holds hdev->lock */
3032struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3033 bdaddr_t *addr, u8 addr_type)
3034{
3035 struct hci_conn_params *params;
3036
3037 params = hci_conn_params_lookup(hdev, addr, addr_type);
3038 if (params)
3039 return params;
3040
3041 params = kzalloc(sizeof(*params), GFP_KERNEL);
3042 if (!params) {
3043 bt_dev_err(hdev, "out of memory");
3044 return NULL;
3045 }
3046
3047 bacpy(¶ms->addr, addr);
3048 params->addr_type = addr_type;
3049
3050 list_add(¶ms->list, &hdev->le_conn_params);
3051 INIT_LIST_HEAD(¶ms->action);
3052
3053 params->conn_min_interval = hdev->le_conn_min_interval;
3054 params->conn_max_interval = hdev->le_conn_max_interval;
3055 params->conn_latency = hdev->le_conn_latency;
3056 params->supervision_timeout = hdev->le_supv_timeout;
3057 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3058
3059 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3060
3061 return params;
3062}
3063
3064static void hci_conn_params_free(struct hci_conn_params *params)
3065{
3066 if (params->conn) {
3067 hci_conn_drop(params->conn);
3068 hci_conn_put(params->conn);
3069 }
3070
3071 list_del(¶ms->action);
3072 list_del(¶ms->list);
3073 kfree(params);
3074}
3075
3076/* This function requires the caller holds hdev->lock */
3077void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3078{
3079 struct hci_conn_params *params;
3080
3081 params = hci_conn_params_lookup(hdev, addr, addr_type);
3082 if (!params)
3083 return;
3084
3085 hci_conn_params_free(params);
3086
3087 hci_update_background_scan(hdev);
3088
3089 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3090}
3091
3092/* This function requires the caller holds hdev->lock */
3093void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3094{
3095 struct hci_conn_params *params, *tmp;
3096
3097 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3098 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3099 continue;
3100
3101 /* If trying to estabilish one time connection to disabled
3102 * device, leave the params, but mark them as just once.
3103 */
3104 if (params->explicit_connect) {
3105 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
3106 continue;
3107 }
3108
3109 list_del(¶ms->list);
3110 kfree(params);
3111 }
3112
3113 BT_DBG("All LE disabled connection parameters were removed");
3114}
3115
3116/* This function requires the caller holds hdev->lock */
3117static void hci_conn_params_clear_all(struct hci_dev *hdev)
3118{
3119 struct hci_conn_params *params, *tmp;
3120
3121 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3122 hci_conn_params_free(params);
3123
3124 BT_DBG("All LE connection parameters were removed");
3125}
3126
3127/* Copy the Identity Address of the controller.
3128 *
3129 * If the controller has a public BD_ADDR, then by default use that one.
3130 * If this is a LE only controller without a public address, default to
3131 * the static random address.
3132 *
3133 * For debugging purposes it is possible to force controllers with a
3134 * public address to use the static random address instead.
3135 *
3136 * In case BR/EDR has been disabled on a dual-mode controller and
3137 * userspace has configured a static address, then that address
3138 * becomes the identity address instead of the public BR/EDR address.
3139 */
3140void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3141 u8 *bdaddr_type)
3142{
3143 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3144 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3145 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3146 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3147 bacpy(bdaddr, &hdev->static_addr);
3148 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3149 } else {
3150 bacpy(bdaddr, &hdev->bdaddr);
3151 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3152 }
3153}
3154
3155/* Alloc HCI device */
3156struct hci_dev *hci_alloc_dev(void)
3157{
3158 struct hci_dev *hdev;
3159
3160 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3161 if (!hdev)
3162 return NULL;
3163
3164 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3165 hdev->esco_type = (ESCO_HV1);
3166 hdev->link_mode = (HCI_LM_ACCEPT);
3167 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3168 hdev->io_capability = 0x03; /* No Input No Output */
3169 hdev->manufacturer = 0xffff; /* Default to internal use */
3170 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3171 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3172 hdev->adv_instance_cnt = 0;
3173 hdev->cur_adv_instance = 0x00;
3174 hdev->adv_instance_timeout = 0;
3175
3176 hdev->sniff_max_interval = 800;
3177 hdev->sniff_min_interval = 80;
3178
3179 hdev->le_adv_channel_map = 0x07;
3180 hdev->le_adv_min_interval = 0x0800;
3181 hdev->le_adv_max_interval = 0x0800;
3182 hdev->le_scan_interval = 0x0060;
3183 hdev->le_scan_window = 0x0030;
3184 hdev->le_conn_min_interval = 0x0018;
3185 hdev->le_conn_max_interval = 0x0028;
3186 hdev->le_conn_latency = 0x0000;
3187 hdev->le_supv_timeout = 0x002a;
3188 hdev->le_def_tx_len = 0x001b;
3189 hdev->le_def_tx_time = 0x0148;
3190 hdev->le_max_tx_len = 0x001b;
3191 hdev->le_max_tx_time = 0x0148;
3192 hdev->le_max_rx_len = 0x001b;
3193 hdev->le_max_rx_time = 0x0148;
3194 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
3195 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3196 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
3197 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3198 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
3199
3200 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3201 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3202 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3203 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3204 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
3205 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
3206
3207 mutex_init(&hdev->lock);
3208 mutex_init(&hdev->req_lock);
3209
3210 INIT_LIST_HEAD(&hdev->mgmt_pending);
3211 INIT_LIST_HEAD(&hdev->blacklist);
3212 INIT_LIST_HEAD(&hdev->whitelist);
3213 INIT_LIST_HEAD(&hdev->uuids);
3214 INIT_LIST_HEAD(&hdev->link_keys);
3215 INIT_LIST_HEAD(&hdev->long_term_keys);
3216 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3217 INIT_LIST_HEAD(&hdev->remote_oob_data);
3218 INIT_LIST_HEAD(&hdev->le_white_list);
3219 INIT_LIST_HEAD(&hdev->le_resolv_list);
3220 INIT_LIST_HEAD(&hdev->le_conn_params);
3221 INIT_LIST_HEAD(&hdev->pend_le_conns);
3222 INIT_LIST_HEAD(&hdev->pend_le_reports);
3223 INIT_LIST_HEAD(&hdev->conn_hash.list);
3224 INIT_LIST_HEAD(&hdev->adv_instances);
3225
3226 INIT_WORK(&hdev->rx_work, hci_rx_work);
3227 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3228 INIT_WORK(&hdev->tx_work, hci_tx_work);
3229 INIT_WORK(&hdev->power_on, hci_power_on);
3230 INIT_WORK(&hdev->error_reset, hci_error_reset);
3231
3232 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3233
3234 skb_queue_head_init(&hdev->rx_q);
3235 skb_queue_head_init(&hdev->cmd_q);
3236 skb_queue_head_init(&hdev->raw_q);
3237
3238 init_waitqueue_head(&hdev->req_wait_q);
3239
3240 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3241
3242 hci_request_setup(hdev);
3243
3244 hci_init_sysfs(hdev);
3245 discovery_init(hdev);
3246
3247 return hdev;
3248}
3249EXPORT_SYMBOL(hci_alloc_dev);
3250
3251/* Free HCI device */
3252void hci_free_dev(struct hci_dev *hdev)
3253{
3254 /* will free via device release */
3255 put_device(&hdev->dev);
3256}
3257EXPORT_SYMBOL(hci_free_dev);
3258
3259/* Register HCI device */
3260int hci_register_dev(struct hci_dev *hdev)
3261{
3262 int id, error;
3263
3264 if (!hdev->open || !hdev->close || !hdev->send)
3265 return -EINVAL;
3266
3267 /* Do not allow HCI_AMP devices to register at index 0,
3268 * so the index can be used as the AMP controller ID.
3269 */
3270 switch (hdev->dev_type) {
3271 case HCI_PRIMARY:
3272 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3273 break;
3274 case HCI_AMP:
3275 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3276 break;
3277 default:
3278 return -EINVAL;
3279 }
3280
3281 if (id < 0)
3282 return id;
3283
3284 sprintf(hdev->name, "hci%d", id);
3285 hdev->id = id;
3286
3287 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3288
3289 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3290 if (!hdev->workqueue) {
3291 error = -ENOMEM;
3292 goto err;
3293 }
3294
3295 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3296 hdev->name);
3297 if (!hdev->req_workqueue) {
3298 destroy_workqueue(hdev->workqueue);
3299 error = -ENOMEM;
3300 goto err;
3301 }
3302
3303 if (!IS_ERR_OR_NULL(bt_debugfs))
3304 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3305
3306 dev_set_name(&hdev->dev, "%s", hdev->name);
3307
3308 error = device_add(&hdev->dev);
3309 if (error < 0)
3310 goto err_wqueue;
3311
3312 hci_leds_init(hdev);
3313
3314 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3315 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3316 hdev);
3317 if (hdev->rfkill) {
3318 if (rfkill_register(hdev->rfkill) < 0) {
3319 rfkill_destroy(hdev->rfkill);
3320 hdev->rfkill = NULL;
3321 }
3322 }
3323
3324 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3325 hci_dev_set_flag(hdev, HCI_RFKILLED);
3326
3327 hci_dev_set_flag(hdev, HCI_SETUP);
3328 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3329
3330 if (hdev->dev_type == HCI_PRIMARY) {
3331 /* Assume BR/EDR support until proven otherwise (such as
3332 * through reading supported features during init.
3333 */
3334 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3335 }
3336
3337 write_lock(&hci_dev_list_lock);
3338 list_add(&hdev->list, &hci_dev_list);
3339 write_unlock(&hci_dev_list_lock);
3340
3341 /* Devices that are marked for raw-only usage are unconfigured
3342 * and should not be included in normal operation.
3343 */
3344 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3345 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3346
3347 hci_sock_dev_event(hdev, HCI_DEV_REG);
3348 hci_dev_hold(hdev);
3349
3350 queue_work(hdev->req_workqueue, &hdev->power_on);
3351
3352 return id;
3353
3354err_wqueue:
3355 destroy_workqueue(hdev->workqueue);
3356 destroy_workqueue(hdev->req_workqueue);
3357err:
3358 ida_simple_remove(&hci_index_ida, hdev->id);
3359
3360 return error;
3361}
3362EXPORT_SYMBOL(hci_register_dev);
3363
3364/* Unregister HCI device */
3365void hci_unregister_dev(struct hci_dev *hdev)
3366{
3367 int id;
3368
3369 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3370
3371 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3372
3373 id = hdev->id;
3374
3375 write_lock(&hci_dev_list_lock);
3376 list_del(&hdev->list);
3377 write_unlock(&hci_dev_list_lock);
3378
3379 cancel_work_sync(&hdev->power_on);
3380
3381 hci_dev_do_close(hdev);
3382
3383 if (!test_bit(HCI_INIT, &hdev->flags) &&
3384 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3385 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3386 hci_dev_lock(hdev);
3387 mgmt_index_removed(hdev);
3388 hci_dev_unlock(hdev);
3389 }
3390
3391 /* mgmt_index_removed should take care of emptying the
3392 * pending list */
3393 BUG_ON(!list_empty(&hdev->mgmt_pending));
3394
3395 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3396
3397 if (hdev->rfkill) {
3398 rfkill_unregister(hdev->rfkill);
3399 rfkill_destroy(hdev->rfkill);
3400 }
3401
3402 device_del(&hdev->dev);
3403
3404 debugfs_remove_recursive(hdev->debugfs);
3405 kfree_const(hdev->hw_info);
3406 kfree_const(hdev->fw_info);
3407
3408 destroy_workqueue(hdev->workqueue);
3409 destroy_workqueue(hdev->req_workqueue);
3410
3411 hci_dev_lock(hdev);
3412 hci_bdaddr_list_clear(&hdev->blacklist);
3413 hci_bdaddr_list_clear(&hdev->whitelist);
3414 hci_uuids_clear(hdev);
3415 hci_link_keys_clear(hdev);
3416 hci_smp_ltks_clear(hdev);
3417 hci_smp_irks_clear(hdev);
3418 hci_remote_oob_data_clear(hdev);
3419 hci_adv_instances_clear(hdev);
3420 hci_bdaddr_list_clear(&hdev->le_white_list);
3421 hci_bdaddr_list_clear(&hdev->le_resolv_list);
3422 hci_conn_params_clear_all(hdev);
3423 hci_discovery_filter_clear(hdev);
3424 hci_dev_unlock(hdev);
3425
3426 hci_dev_put(hdev);
3427
3428 ida_simple_remove(&hci_index_ida, id);
3429}
3430EXPORT_SYMBOL(hci_unregister_dev);
3431
3432/* Suspend HCI device */
3433int hci_suspend_dev(struct hci_dev *hdev)
3434{
3435 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3436 return 0;
3437}
3438EXPORT_SYMBOL(hci_suspend_dev);
3439
3440/* Resume HCI device */
3441int hci_resume_dev(struct hci_dev *hdev)
3442{
3443 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3444 return 0;
3445}
3446EXPORT_SYMBOL(hci_resume_dev);
3447
3448/* Reset HCI device */
3449int hci_reset_dev(struct hci_dev *hdev)
3450{
3451 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3452 struct sk_buff *skb;
3453
3454 skb = bt_skb_alloc(3, GFP_ATOMIC);
3455 if (!skb)
3456 return -ENOMEM;
3457
3458 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3459 skb_put_data(skb, hw_err, 3);
3460
3461 /* Send Hardware Error to upper stack */
3462 return hci_recv_frame(hdev, skb);
3463}
3464EXPORT_SYMBOL(hci_reset_dev);
3465
3466/* Receive frame from HCI drivers */
3467int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3468{
3469 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3470 && !test_bit(HCI_INIT, &hdev->flags))) {
3471 kfree_skb(skb);
3472 return -ENXIO;
3473 }
3474
3475 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3476 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3477 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
3478 kfree_skb(skb);
3479 return -EINVAL;
3480 }
3481
3482 /* Incoming skb */
3483 bt_cb(skb)->incoming = 1;
3484
3485 /* Time stamp */
3486 __net_timestamp(skb);
3487
3488 skb_queue_tail(&hdev->rx_q, skb);
3489 queue_work(hdev->workqueue, &hdev->rx_work);
3490
3491 return 0;
3492}
3493EXPORT_SYMBOL(hci_recv_frame);
3494
3495/* Receive diagnostic message from HCI drivers */
3496int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3497{
3498 /* Mark as diagnostic packet */
3499 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3500
3501 /* Time stamp */
3502 __net_timestamp(skb);
3503
3504 skb_queue_tail(&hdev->rx_q, skb);
3505 queue_work(hdev->workqueue, &hdev->rx_work);
3506
3507 return 0;
3508}
3509EXPORT_SYMBOL(hci_recv_diag);
3510
3511void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3512{
3513 va_list vargs;
3514
3515 va_start(vargs, fmt);
3516 kfree_const(hdev->hw_info);
3517 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3518 va_end(vargs);
3519}
3520EXPORT_SYMBOL(hci_set_hw_info);
3521
3522void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3523{
3524 va_list vargs;
3525
3526 va_start(vargs, fmt);
3527 kfree_const(hdev->fw_info);
3528 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3529 va_end(vargs);
3530}
3531EXPORT_SYMBOL(hci_set_fw_info);
3532
3533/* ---- Interface to upper protocols ---- */
3534
3535int hci_register_cb(struct hci_cb *cb)
3536{
3537 BT_DBG("%p name %s", cb, cb->name);
3538
3539 mutex_lock(&hci_cb_list_lock);
3540 list_add_tail(&cb->list, &hci_cb_list);
3541 mutex_unlock(&hci_cb_list_lock);
3542
3543 return 0;
3544}
3545EXPORT_SYMBOL(hci_register_cb);
3546
3547int hci_unregister_cb(struct hci_cb *cb)
3548{
3549 BT_DBG("%p name %s", cb, cb->name);
3550
3551 mutex_lock(&hci_cb_list_lock);
3552 list_del(&cb->list);
3553 mutex_unlock(&hci_cb_list_lock);
3554
3555 return 0;
3556}
3557EXPORT_SYMBOL(hci_unregister_cb);
3558
3559static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3560{
3561 int err;
3562
3563 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3564 skb->len);
3565
3566 /* Time stamp */
3567 __net_timestamp(skb);
3568
3569 /* Send copy to monitor */
3570 hci_send_to_monitor(hdev, skb);
3571
3572 if (atomic_read(&hdev->promisc)) {
3573 /* Send copy to the sockets */
3574 hci_send_to_sock(hdev, skb);
3575 }
3576
3577 /* Get rid of skb owner, prior to sending to the driver. */
3578 skb_orphan(skb);
3579
3580 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3581 kfree_skb(skb);
3582 return;
3583 }
3584
3585 err = hdev->send(hdev, skb);
3586 if (err < 0) {
3587 bt_dev_err(hdev, "sending frame failed (%d)", err);
3588 kfree_skb(skb);
3589 }
3590}
3591
3592/* Send HCI command */
3593int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3594 const void *param)
3595{
3596 struct sk_buff *skb;
3597
3598 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3599
3600 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3601 if (!skb) {
3602 bt_dev_err(hdev, "no memory for command");
3603 return -ENOMEM;
3604 }
3605
3606 /* Stand-alone HCI commands must be flagged as
3607 * single-command requests.
3608 */
3609 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3610
3611 skb_queue_tail(&hdev->cmd_q, skb);
3612 queue_work(hdev->workqueue, &hdev->cmd_work);
3613
3614 return 0;
3615}
3616
3617int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3618 const void *param)
3619{
3620 struct sk_buff *skb;
3621
3622 if (hci_opcode_ogf(opcode) != 0x3f) {
3623 /* A controller receiving a command shall respond with either
3624 * a Command Status Event or a Command Complete Event.
3625 * Therefore, all standard HCI commands must be sent via the
3626 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3627 * Some vendors do not comply with this rule for vendor-specific
3628 * commands and do not return any event. We want to support
3629 * unresponded commands for such cases only.
3630 */
3631 bt_dev_err(hdev, "unresponded command not supported");
3632 return -EINVAL;
3633 }
3634
3635 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3636 if (!skb) {
3637 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3638 opcode);
3639 return -ENOMEM;
3640 }
3641
3642 hci_send_frame(hdev, skb);
3643
3644 return 0;
3645}
3646EXPORT_SYMBOL(__hci_cmd_send);
3647
3648/* Get data from the previously sent command */
3649void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3650{
3651 struct hci_command_hdr *hdr;
3652
3653 if (!hdev->sent_cmd)
3654 return NULL;
3655
3656 hdr = (void *) hdev->sent_cmd->data;
3657
3658 if (hdr->opcode != cpu_to_le16(opcode))
3659 return NULL;
3660
3661 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3662
3663 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3664}
3665
3666/* Send HCI command and wait for command commplete event */
3667struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3668 const void *param, u32 timeout)
3669{
3670 struct sk_buff *skb;
3671
3672 if (!test_bit(HCI_UP, &hdev->flags))
3673 return ERR_PTR(-ENETDOWN);
3674
3675 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3676
3677 hci_req_sync_lock(hdev);
3678 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3679 hci_req_sync_unlock(hdev);
3680
3681 return skb;
3682}
3683EXPORT_SYMBOL(hci_cmd_sync);
3684
3685/* Send ACL data */
3686static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3687{
3688 struct hci_acl_hdr *hdr;
3689 int len = skb->len;
3690
3691 skb_push(skb, HCI_ACL_HDR_SIZE);
3692 skb_reset_transport_header(skb);
3693 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3694 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3695 hdr->dlen = cpu_to_le16(len);
3696}
3697
3698static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3699 struct sk_buff *skb, __u16 flags)
3700{
3701 struct hci_conn *conn = chan->conn;
3702 struct hci_dev *hdev = conn->hdev;
3703 struct sk_buff *list;
3704
3705 skb->len = skb_headlen(skb);
3706 skb->data_len = 0;
3707
3708 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3709
3710 switch (hdev->dev_type) {
3711 case HCI_PRIMARY:
3712 hci_add_acl_hdr(skb, conn->handle, flags);
3713 break;
3714 case HCI_AMP:
3715 hci_add_acl_hdr(skb, chan->handle, flags);
3716 break;
3717 default:
3718 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3719 return;
3720 }
3721
3722 list = skb_shinfo(skb)->frag_list;
3723 if (!list) {
3724 /* Non fragmented */
3725 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3726
3727 skb_queue_tail(queue, skb);
3728 } else {
3729 /* Fragmented */
3730 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3731
3732 skb_shinfo(skb)->frag_list = NULL;
3733
3734 /* Queue all fragments atomically. We need to use spin_lock_bh
3735 * here because of 6LoWPAN links, as there this function is
3736 * called from softirq and using normal spin lock could cause
3737 * deadlocks.
3738 */
3739 spin_lock_bh(&queue->lock);
3740
3741 __skb_queue_tail(queue, skb);
3742
3743 flags &= ~ACL_START;
3744 flags |= ACL_CONT;
3745 do {
3746 skb = list; list = list->next;
3747
3748 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3749 hci_add_acl_hdr(skb, conn->handle, flags);
3750
3751 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3752
3753 __skb_queue_tail(queue, skb);
3754 } while (list);
3755
3756 spin_unlock_bh(&queue->lock);
3757 }
3758}
3759
3760void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3761{
3762 struct hci_dev *hdev = chan->conn->hdev;
3763
3764 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3765
3766 hci_queue_acl(chan, &chan->data_q, skb, flags);
3767
3768 queue_work(hdev->workqueue, &hdev->tx_work);
3769}
3770
3771/* Send SCO data */
3772void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3773{
3774 struct hci_dev *hdev = conn->hdev;
3775 struct hci_sco_hdr hdr;
3776
3777 BT_DBG("%s len %d", hdev->name, skb->len);
3778
3779 hdr.handle = cpu_to_le16(conn->handle);
3780 hdr.dlen = skb->len;
3781
3782 skb_push(skb, HCI_SCO_HDR_SIZE);
3783 skb_reset_transport_header(skb);
3784 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3785
3786 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3787
3788 skb_queue_tail(&conn->data_q, skb);
3789 queue_work(hdev->workqueue, &hdev->tx_work);
3790}
3791
3792/* ---- HCI TX task (outgoing data) ---- */
3793
3794/* HCI Connection scheduler */
3795static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3796 int *quote)
3797{
3798 struct hci_conn_hash *h = &hdev->conn_hash;
3799 struct hci_conn *conn = NULL, *c;
3800 unsigned int num = 0, min = ~0;
3801
3802 /* We don't have to lock device here. Connections are always
3803 * added and removed with TX task disabled. */
3804
3805 rcu_read_lock();
3806
3807 list_for_each_entry_rcu(c, &h->list, list) {
3808 if (c->type != type || skb_queue_empty(&c->data_q))
3809 continue;
3810
3811 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3812 continue;
3813
3814 num++;
3815
3816 if (c->sent < min) {
3817 min = c->sent;
3818 conn = c;
3819 }
3820
3821 if (hci_conn_num(hdev, type) == num)
3822 break;
3823 }
3824
3825 rcu_read_unlock();
3826
3827 if (conn) {
3828 int cnt, q;
3829
3830 switch (conn->type) {
3831 case ACL_LINK:
3832 cnt = hdev->acl_cnt;
3833 break;
3834 case SCO_LINK:
3835 case ESCO_LINK:
3836 cnt = hdev->sco_cnt;
3837 break;
3838 case LE_LINK:
3839 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3840 break;
3841 default:
3842 cnt = 0;
3843 bt_dev_err(hdev, "unknown link type %d", conn->type);
3844 }
3845
3846 q = cnt / num;
3847 *quote = q ? q : 1;
3848 } else
3849 *quote = 0;
3850
3851 BT_DBG("conn %p quote %d", conn, *quote);
3852 return conn;
3853}
3854
3855static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3856{
3857 struct hci_conn_hash *h = &hdev->conn_hash;
3858 struct hci_conn *c;
3859
3860 bt_dev_err(hdev, "link tx timeout");
3861
3862 rcu_read_lock();
3863
3864 /* Kill stalled connections */
3865 list_for_each_entry_rcu(c, &h->list, list) {
3866 if (c->type == type && c->sent) {
3867 bt_dev_err(hdev, "killing stalled connection %pMR",
3868 &c->dst);
3869 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3870 }
3871 }
3872
3873 rcu_read_unlock();
3874}
3875
3876static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3877 int *quote)
3878{
3879 struct hci_conn_hash *h = &hdev->conn_hash;
3880 struct hci_chan *chan = NULL;
3881 unsigned int num = 0, min = ~0, cur_prio = 0;
3882 struct hci_conn *conn;
3883 int cnt, q, conn_num = 0;
3884
3885 BT_DBG("%s", hdev->name);
3886
3887 rcu_read_lock();
3888
3889 list_for_each_entry_rcu(conn, &h->list, list) {
3890 struct hci_chan *tmp;
3891
3892 if (conn->type != type)
3893 continue;
3894
3895 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3896 continue;
3897
3898 conn_num++;
3899
3900 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3901 struct sk_buff *skb;
3902
3903 if (skb_queue_empty(&tmp->data_q))
3904 continue;
3905
3906 skb = skb_peek(&tmp->data_q);
3907 if (skb->priority < cur_prio)
3908 continue;
3909
3910 if (skb->priority > cur_prio) {
3911 num = 0;
3912 min = ~0;
3913 cur_prio = skb->priority;
3914 }
3915
3916 num++;
3917
3918 if (conn->sent < min) {
3919 min = conn->sent;
3920 chan = tmp;
3921 }
3922 }
3923
3924 if (hci_conn_num(hdev, type) == conn_num)
3925 break;
3926 }
3927
3928 rcu_read_unlock();
3929
3930 if (!chan)
3931 return NULL;
3932
3933 switch (chan->conn->type) {
3934 case ACL_LINK:
3935 cnt = hdev->acl_cnt;
3936 break;
3937 case AMP_LINK:
3938 cnt = hdev->block_cnt;
3939 break;
3940 case SCO_LINK:
3941 case ESCO_LINK:
3942 cnt = hdev->sco_cnt;
3943 break;
3944 case LE_LINK:
3945 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3946 break;
3947 default:
3948 cnt = 0;
3949 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
3950 }
3951
3952 q = cnt / num;
3953 *quote = q ? q : 1;
3954 BT_DBG("chan %p quote %d", chan, *quote);
3955 return chan;
3956}
3957
3958static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3959{
3960 struct hci_conn_hash *h = &hdev->conn_hash;
3961 struct hci_conn *conn;
3962 int num = 0;
3963
3964 BT_DBG("%s", hdev->name);
3965
3966 rcu_read_lock();
3967
3968 list_for_each_entry_rcu(conn, &h->list, list) {
3969 struct hci_chan *chan;
3970
3971 if (conn->type != type)
3972 continue;
3973
3974 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3975 continue;
3976
3977 num++;
3978
3979 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3980 struct sk_buff *skb;
3981
3982 if (chan->sent) {
3983 chan->sent = 0;
3984 continue;
3985 }
3986
3987 if (skb_queue_empty(&chan->data_q))
3988 continue;
3989
3990 skb = skb_peek(&chan->data_q);
3991 if (skb->priority >= HCI_PRIO_MAX - 1)
3992 continue;
3993
3994 skb->priority = HCI_PRIO_MAX - 1;
3995
3996 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3997 skb->priority);
3998 }
3999
4000 if (hci_conn_num(hdev, type) == num)
4001 break;
4002 }
4003
4004 rcu_read_unlock();
4005
4006}
4007
4008static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4009{
4010 /* Calculate count of blocks used by this packet */
4011 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4012}
4013
4014static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4015{
4016 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4017 /* ACL tx timeout must be longer than maximum
4018 * link supervision timeout (40.9 seconds) */
4019 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4020 HCI_ACL_TX_TIMEOUT))
4021 hci_link_tx_to(hdev, ACL_LINK);
4022 }
4023}
4024
4025static void hci_sched_acl_pkt(struct hci_dev *hdev)
4026{
4027 unsigned int cnt = hdev->acl_cnt;
4028 struct hci_chan *chan;
4029 struct sk_buff *skb;
4030 int quote;
4031
4032 __check_timeout(hdev, cnt);
4033
4034 while (hdev->acl_cnt &&
4035 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
4036 u32 priority = (skb_peek(&chan->data_q))->priority;
4037 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4038 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4039 skb->len, skb->priority);
4040
4041 /* Stop if priority has changed */
4042 if (skb->priority < priority)
4043 break;
4044
4045 skb = skb_dequeue(&chan->data_q);
4046
4047 hci_conn_enter_active_mode(chan->conn,
4048 bt_cb(skb)->force_active);
4049
4050 hci_send_frame(hdev, skb);
4051 hdev->acl_last_tx = jiffies;
4052
4053 hdev->acl_cnt--;
4054 chan->sent++;
4055 chan->conn->sent++;
4056 }
4057 }
4058
4059 if (cnt != hdev->acl_cnt)
4060 hci_prio_recalculate(hdev, ACL_LINK);
4061}
4062
4063static void hci_sched_acl_blk(struct hci_dev *hdev)
4064{
4065 unsigned int cnt = hdev->block_cnt;
4066 struct hci_chan *chan;
4067 struct sk_buff *skb;
4068 int quote;
4069 u8 type;
4070
4071 __check_timeout(hdev, cnt);
4072
4073 BT_DBG("%s", hdev->name);
4074
4075 if (hdev->dev_type == HCI_AMP)
4076 type = AMP_LINK;
4077 else
4078 type = ACL_LINK;
4079
4080 while (hdev->block_cnt > 0 &&
4081 (chan = hci_chan_sent(hdev, type, "e))) {
4082 u32 priority = (skb_peek(&chan->data_q))->priority;
4083 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4084 int blocks;
4085
4086 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4087 skb->len, skb->priority);
4088
4089 /* Stop if priority has changed */
4090 if (skb->priority < priority)
4091 break;
4092
4093 skb = skb_dequeue(&chan->data_q);
4094
4095 blocks = __get_blocks(hdev, skb);
4096 if (blocks > hdev->block_cnt)
4097 return;
4098
4099 hci_conn_enter_active_mode(chan->conn,
4100 bt_cb(skb)->force_active);
4101
4102 hci_send_frame(hdev, skb);
4103 hdev->acl_last_tx = jiffies;
4104
4105 hdev->block_cnt -= blocks;
4106 quote -= blocks;
4107
4108 chan->sent += blocks;
4109 chan->conn->sent += blocks;
4110 }
4111 }
4112
4113 if (cnt != hdev->block_cnt)
4114 hci_prio_recalculate(hdev, type);
4115}
4116
4117static void hci_sched_acl(struct hci_dev *hdev)
4118{
4119 BT_DBG("%s", hdev->name);
4120
4121 /* No ACL link over BR/EDR controller */
4122 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4123 return;
4124
4125 /* No AMP link over AMP controller */
4126 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4127 return;
4128
4129 switch (hdev->flow_ctl_mode) {
4130 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4131 hci_sched_acl_pkt(hdev);
4132 break;
4133
4134 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4135 hci_sched_acl_blk(hdev);
4136 break;
4137 }
4138}
4139
4140/* Schedule SCO */
4141static void hci_sched_sco(struct hci_dev *hdev)
4142{
4143 struct hci_conn *conn;
4144 struct sk_buff *skb;
4145 int quote;
4146
4147 BT_DBG("%s", hdev->name);
4148
4149 if (!hci_conn_num(hdev, SCO_LINK))
4150 return;
4151
4152 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
4153 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4154 BT_DBG("skb %p len %d", skb, skb->len);
4155 hci_send_frame(hdev, skb);
4156
4157 conn->sent++;
4158 if (conn->sent == ~0)
4159 conn->sent = 0;
4160 }
4161 }
4162}
4163
4164static void hci_sched_esco(struct hci_dev *hdev)
4165{
4166 struct hci_conn *conn;
4167 struct sk_buff *skb;
4168 int quote;
4169
4170 BT_DBG("%s", hdev->name);
4171
4172 if (!hci_conn_num(hdev, ESCO_LINK))
4173 return;
4174
4175 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4176 "e))) {
4177 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4178 BT_DBG("skb %p len %d", skb, skb->len);
4179 hci_send_frame(hdev, skb);
4180
4181 conn->sent++;
4182 if (conn->sent == ~0)
4183 conn->sent = 0;
4184 }
4185 }
4186}
4187
4188static void hci_sched_le(struct hci_dev *hdev)
4189{
4190 struct hci_chan *chan;
4191 struct sk_buff *skb;
4192 int quote, cnt, tmp;
4193
4194 BT_DBG("%s", hdev->name);
4195
4196 if (!hci_conn_num(hdev, LE_LINK))
4197 return;
4198
4199 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4200 /* LE tx timeout must be longer than maximum
4201 * link supervision timeout (40.9 seconds) */
4202 if (!hdev->le_cnt && hdev->le_pkts &&
4203 time_after(jiffies, hdev->le_last_tx + HZ * 45))
4204 hci_link_tx_to(hdev, LE_LINK);
4205 }
4206
4207 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4208 tmp = cnt;
4209 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
4210 u32 priority = (skb_peek(&chan->data_q))->priority;
4211 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4212 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4213 skb->len, skb->priority);
4214
4215 /* Stop if priority has changed */
4216 if (skb->priority < priority)
4217 break;
4218
4219 skb = skb_dequeue(&chan->data_q);
4220
4221 hci_send_frame(hdev, skb);
4222 hdev->le_last_tx = jiffies;
4223
4224 cnt--;
4225 chan->sent++;
4226 chan->conn->sent++;
4227 }
4228 }
4229
4230 if (hdev->le_pkts)
4231 hdev->le_cnt = cnt;
4232 else
4233 hdev->acl_cnt = cnt;
4234
4235 if (cnt != tmp)
4236 hci_prio_recalculate(hdev, LE_LINK);
4237}
4238
4239static void hci_tx_work(struct work_struct *work)
4240{
4241 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4242 struct sk_buff *skb;
4243
4244 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4245 hdev->sco_cnt, hdev->le_cnt);
4246
4247 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4248 /* Schedule queues and send stuff to HCI driver */
4249 hci_sched_acl(hdev);
4250 hci_sched_sco(hdev);
4251 hci_sched_esco(hdev);
4252 hci_sched_le(hdev);
4253 }
4254
4255 /* Send next queued raw (unknown type) packet */
4256 while ((skb = skb_dequeue(&hdev->raw_q)))
4257 hci_send_frame(hdev, skb);
4258}
4259
4260/* ----- HCI RX task (incoming data processing) ----- */
4261
4262/* ACL data packet */
4263static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4264{
4265 struct hci_acl_hdr *hdr = (void *) skb->data;
4266 struct hci_conn *conn;
4267 __u16 handle, flags;
4268
4269 skb_pull(skb, HCI_ACL_HDR_SIZE);
4270
4271 handle = __le16_to_cpu(hdr->handle);
4272 flags = hci_flags(handle);
4273 handle = hci_handle(handle);
4274
4275 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4276 handle, flags);
4277
4278 hdev->stat.acl_rx++;
4279
4280 hci_dev_lock(hdev);
4281 conn = hci_conn_hash_lookup_handle(hdev, handle);
4282 hci_dev_unlock(hdev);
4283
4284 if (conn) {
4285 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4286
4287 /* Send to upper protocol */
4288 l2cap_recv_acldata(conn, skb, flags);
4289 return;
4290 } else {
4291 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4292 handle);
4293 }
4294
4295 kfree_skb(skb);
4296}
4297
4298/* SCO data packet */
4299static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4300{
4301 struct hci_sco_hdr *hdr = (void *) skb->data;
4302 struct hci_conn *conn;
4303 __u16 handle;
4304
4305 skb_pull(skb, HCI_SCO_HDR_SIZE);
4306
4307 handle = __le16_to_cpu(hdr->handle);
4308
4309 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4310
4311 hdev->stat.sco_rx++;
4312
4313 hci_dev_lock(hdev);
4314 conn = hci_conn_hash_lookup_handle(hdev, handle);
4315 hci_dev_unlock(hdev);
4316
4317 if (conn) {
4318 /* Send to upper protocol */
4319 sco_recv_scodata(conn, skb);
4320 return;
4321 } else {
4322 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4323 handle);
4324 }
4325
4326 kfree_skb(skb);
4327}
4328
4329static bool hci_req_is_complete(struct hci_dev *hdev)
4330{
4331 struct sk_buff *skb;
4332
4333 skb = skb_peek(&hdev->cmd_q);
4334 if (!skb)
4335 return true;
4336
4337 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4338}
4339
4340static void hci_resend_last(struct hci_dev *hdev)
4341{
4342 struct hci_command_hdr *sent;
4343 struct sk_buff *skb;
4344 u16 opcode;
4345
4346 if (!hdev->sent_cmd)
4347 return;
4348
4349 sent = (void *) hdev->sent_cmd->data;
4350 opcode = __le16_to_cpu(sent->opcode);
4351 if (opcode == HCI_OP_RESET)
4352 return;
4353
4354 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4355 if (!skb)
4356 return;
4357
4358 skb_queue_head(&hdev->cmd_q, skb);
4359 queue_work(hdev->workqueue, &hdev->cmd_work);
4360}
4361
4362void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4363 hci_req_complete_t *req_complete,
4364 hci_req_complete_skb_t *req_complete_skb)
4365{
4366 struct sk_buff *skb;
4367 unsigned long flags;
4368
4369 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4370
4371 /* If the completed command doesn't match the last one that was
4372 * sent we need to do special handling of it.
4373 */
4374 if (!hci_sent_cmd_data(hdev, opcode)) {
4375 /* Some CSR based controllers generate a spontaneous
4376 * reset complete event during init and any pending
4377 * command will never be completed. In such a case we
4378 * need to resend whatever was the last sent
4379 * command.
4380 */
4381 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4382 hci_resend_last(hdev);
4383
4384 return;
4385 }
4386
4387 /* If we reach this point this event matches the last command sent */
4388 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4389
4390 /* If the command succeeded and there's still more commands in
4391 * this request the request is not yet complete.
4392 */
4393 if (!status && !hci_req_is_complete(hdev))
4394 return;
4395
4396 /* If this was the last command in a request the complete
4397 * callback would be found in hdev->sent_cmd instead of the
4398 * command queue (hdev->cmd_q).
4399 */
4400 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4401 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4402 return;
4403 }
4404
4405 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4406 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4407 return;
4408 }
4409
4410 /* Remove all pending commands belonging to this request */
4411 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4412 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4413 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4414 __skb_queue_head(&hdev->cmd_q, skb);
4415 break;
4416 }
4417
4418 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4419 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4420 else
4421 *req_complete = bt_cb(skb)->hci.req_complete;
4422 kfree_skb(skb);
4423 }
4424 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4425}
4426
4427static void hci_rx_work(struct work_struct *work)
4428{
4429 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4430 struct sk_buff *skb;
4431
4432 BT_DBG("%s", hdev->name);
4433
4434 while ((skb = skb_dequeue(&hdev->rx_q))) {
4435 /* Send copy to monitor */
4436 hci_send_to_monitor(hdev, skb);
4437
4438 if (atomic_read(&hdev->promisc)) {
4439 /* Send copy to the sockets */
4440 hci_send_to_sock(hdev, skb);
4441 }
4442
4443 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4444 kfree_skb(skb);
4445 continue;
4446 }
4447
4448 if (test_bit(HCI_INIT, &hdev->flags)) {
4449 /* Don't process data packets in this states. */
4450 switch (hci_skb_pkt_type(skb)) {
4451 case HCI_ACLDATA_PKT:
4452 case HCI_SCODATA_PKT:
4453 kfree_skb(skb);
4454 continue;
4455 }
4456 }
4457
4458 /* Process frame */
4459 switch (hci_skb_pkt_type(skb)) {
4460 case HCI_EVENT_PKT:
4461 BT_DBG("%s Event packet", hdev->name);
4462 hci_event_packet(hdev, skb);
4463 break;
4464
4465 case HCI_ACLDATA_PKT:
4466 BT_DBG("%s ACL data packet", hdev->name);
4467 hci_acldata_packet(hdev, skb);
4468 break;
4469
4470 case HCI_SCODATA_PKT:
4471 BT_DBG("%s SCO data packet", hdev->name);
4472 hci_scodata_packet(hdev, skb);
4473 break;
4474
4475 default:
4476 kfree_skb(skb);
4477 break;
4478 }
4479 }
4480}
4481
4482static void hci_cmd_work(struct work_struct *work)
4483{
4484 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4485 struct sk_buff *skb;
4486
4487 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4488 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4489
4490 /* Send queued commands */
4491 if (atomic_read(&hdev->cmd_cnt)) {
4492 skb = skb_dequeue(&hdev->cmd_q);
4493 if (!skb)
4494 return;
4495
4496 kfree_skb(hdev->sent_cmd);
4497
4498 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4499 if (hdev->sent_cmd) {
4500 if (hci_req_status_pend(hdev))
4501 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4502 atomic_dec(&hdev->cmd_cnt);
4503 hci_send_frame(hdev, skb);
4504 if (test_bit(HCI_RESET, &hdev->flags))
4505 cancel_delayed_work(&hdev->cmd_timer);
4506 else
4507 schedule_delayed_work(&hdev->cmd_timer,
4508 HCI_CMD_TIMEOUT);
4509 } else {
4510 skb_queue_head(&hdev->cmd_q, skb);
4511 queue_work(hdev->workqueue, &hdev->cmd_work);
4512 }
4513 }
4514}
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/kcov.h>
33#include <linux/property.h>
34#include <linux/suspend.h>
35#include <linux/wait.h>
36#include <asm/unaligned.h>
37
38#include <net/bluetooth/bluetooth.h>
39#include <net/bluetooth/hci_core.h>
40#include <net/bluetooth/l2cap.h>
41#include <net/bluetooth/mgmt.h>
42
43#include "hci_request.h"
44#include "hci_debugfs.h"
45#include "smp.h"
46#include "leds.h"
47#include "msft.h"
48#include "aosp.h"
49#include "hci_codec.h"
50
51static void hci_rx_work(struct work_struct *work);
52static void hci_cmd_work(struct work_struct *work);
53static void hci_tx_work(struct work_struct *work);
54
55/* HCI device list */
56LIST_HEAD(hci_dev_list);
57DEFINE_RWLOCK(hci_dev_list_lock);
58
59/* HCI callback list */
60LIST_HEAD(hci_cb_list);
61DEFINE_MUTEX(hci_cb_list_lock);
62
63/* HCI ID Numbering */
64static DEFINE_IDA(hci_index_ida);
65
66static int hci_scan_req(struct hci_request *req, unsigned long opt)
67{
68 __u8 scan = opt;
69
70 BT_DBG("%s %x", req->hdev->name, scan);
71
72 /* Inquiry and Page scans */
73 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
74 return 0;
75}
76
77static int hci_auth_req(struct hci_request *req, unsigned long opt)
78{
79 __u8 auth = opt;
80
81 BT_DBG("%s %x", req->hdev->name, auth);
82
83 /* Authentication */
84 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
85 return 0;
86}
87
88static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
89{
90 __u8 encrypt = opt;
91
92 BT_DBG("%s %x", req->hdev->name, encrypt);
93
94 /* Encryption */
95 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
96 return 0;
97}
98
99static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
100{
101 __le16 policy = cpu_to_le16(opt);
102
103 BT_DBG("%s %x", req->hdev->name, policy);
104
105 /* Default link policy */
106 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
107 return 0;
108}
109
110/* Get HCI device by index.
111 * Device is held on return. */
112struct hci_dev *hci_dev_get(int index)
113{
114 struct hci_dev *hdev = NULL, *d;
115
116 BT_DBG("%d", index);
117
118 if (index < 0)
119 return NULL;
120
121 read_lock(&hci_dev_list_lock);
122 list_for_each_entry(d, &hci_dev_list, list) {
123 if (d->id == index) {
124 hdev = hci_dev_hold(d);
125 break;
126 }
127 }
128 read_unlock(&hci_dev_list_lock);
129 return hdev;
130}
131
132/* ---- Inquiry support ---- */
133
134bool hci_discovery_active(struct hci_dev *hdev)
135{
136 struct discovery_state *discov = &hdev->discovery;
137
138 switch (discov->state) {
139 case DISCOVERY_FINDING:
140 case DISCOVERY_RESOLVING:
141 return true;
142
143 default:
144 return false;
145 }
146}
147
148void hci_discovery_set_state(struct hci_dev *hdev, int state)
149{
150 int old_state = hdev->discovery.state;
151
152 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
153
154 if (old_state == state)
155 return;
156
157 hdev->discovery.state = state;
158
159 switch (state) {
160 case DISCOVERY_STOPPED:
161 hci_update_passive_scan(hdev);
162
163 if (old_state != DISCOVERY_STARTING)
164 mgmt_discovering(hdev, 0);
165 break;
166 case DISCOVERY_STARTING:
167 break;
168 case DISCOVERY_FINDING:
169 mgmt_discovering(hdev, 1);
170 break;
171 case DISCOVERY_RESOLVING:
172 break;
173 case DISCOVERY_STOPPING:
174 break;
175 }
176}
177
178void hci_inquiry_cache_flush(struct hci_dev *hdev)
179{
180 struct discovery_state *cache = &hdev->discovery;
181 struct inquiry_entry *p, *n;
182
183 list_for_each_entry_safe(p, n, &cache->all, all) {
184 list_del(&p->all);
185 kfree(p);
186 }
187
188 INIT_LIST_HEAD(&cache->unknown);
189 INIT_LIST_HEAD(&cache->resolve);
190}
191
192struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
193 bdaddr_t *bdaddr)
194{
195 struct discovery_state *cache = &hdev->discovery;
196 struct inquiry_entry *e;
197
198 BT_DBG("cache %p, %pMR", cache, bdaddr);
199
200 list_for_each_entry(e, &cache->all, all) {
201 if (!bacmp(&e->data.bdaddr, bdaddr))
202 return e;
203 }
204
205 return NULL;
206}
207
208struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
209 bdaddr_t *bdaddr)
210{
211 struct discovery_state *cache = &hdev->discovery;
212 struct inquiry_entry *e;
213
214 BT_DBG("cache %p, %pMR", cache, bdaddr);
215
216 list_for_each_entry(e, &cache->unknown, list) {
217 if (!bacmp(&e->data.bdaddr, bdaddr))
218 return e;
219 }
220
221 return NULL;
222}
223
224struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
225 bdaddr_t *bdaddr,
226 int state)
227{
228 struct discovery_state *cache = &hdev->discovery;
229 struct inquiry_entry *e;
230
231 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
232
233 list_for_each_entry(e, &cache->resolve, list) {
234 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
235 return e;
236 if (!bacmp(&e->data.bdaddr, bdaddr))
237 return e;
238 }
239
240 return NULL;
241}
242
243void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
244 struct inquiry_entry *ie)
245{
246 struct discovery_state *cache = &hdev->discovery;
247 struct list_head *pos = &cache->resolve;
248 struct inquiry_entry *p;
249
250 list_del(&ie->list);
251
252 list_for_each_entry(p, &cache->resolve, list) {
253 if (p->name_state != NAME_PENDING &&
254 abs(p->data.rssi) >= abs(ie->data.rssi))
255 break;
256 pos = &p->list;
257 }
258
259 list_add(&ie->list, pos);
260}
261
262u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
263 bool name_known)
264{
265 struct discovery_state *cache = &hdev->discovery;
266 struct inquiry_entry *ie;
267 u32 flags = 0;
268
269 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
270
271 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
272
273 if (!data->ssp_mode)
274 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
275
276 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
277 if (ie) {
278 if (!ie->data.ssp_mode)
279 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
280
281 if (ie->name_state == NAME_NEEDED &&
282 data->rssi != ie->data.rssi) {
283 ie->data.rssi = data->rssi;
284 hci_inquiry_cache_update_resolve(hdev, ie);
285 }
286
287 goto update;
288 }
289
290 /* Entry not in the cache. Add new one. */
291 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
292 if (!ie) {
293 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
294 goto done;
295 }
296
297 list_add(&ie->all, &cache->all);
298
299 if (name_known) {
300 ie->name_state = NAME_KNOWN;
301 } else {
302 ie->name_state = NAME_NOT_KNOWN;
303 list_add(&ie->list, &cache->unknown);
304 }
305
306update:
307 if (name_known && ie->name_state != NAME_KNOWN &&
308 ie->name_state != NAME_PENDING) {
309 ie->name_state = NAME_KNOWN;
310 list_del(&ie->list);
311 }
312
313 memcpy(&ie->data, data, sizeof(*data));
314 ie->timestamp = jiffies;
315 cache->timestamp = jiffies;
316
317 if (ie->name_state == NAME_NOT_KNOWN)
318 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
319
320done:
321 return flags;
322}
323
324static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
325{
326 struct discovery_state *cache = &hdev->discovery;
327 struct inquiry_info *info = (struct inquiry_info *) buf;
328 struct inquiry_entry *e;
329 int copied = 0;
330
331 list_for_each_entry(e, &cache->all, all) {
332 struct inquiry_data *data = &e->data;
333
334 if (copied >= num)
335 break;
336
337 bacpy(&info->bdaddr, &data->bdaddr);
338 info->pscan_rep_mode = data->pscan_rep_mode;
339 info->pscan_period_mode = data->pscan_period_mode;
340 info->pscan_mode = data->pscan_mode;
341 memcpy(info->dev_class, data->dev_class, 3);
342 info->clock_offset = data->clock_offset;
343
344 info++;
345 copied++;
346 }
347
348 BT_DBG("cache %p, copied %d", cache, copied);
349 return copied;
350}
351
352static int hci_inq_req(struct hci_request *req, unsigned long opt)
353{
354 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
355 struct hci_dev *hdev = req->hdev;
356 struct hci_cp_inquiry cp;
357
358 BT_DBG("%s", hdev->name);
359
360 if (test_bit(HCI_INQUIRY, &hdev->flags))
361 return 0;
362
363 /* Start Inquiry */
364 memcpy(&cp.lap, &ir->lap, 3);
365 cp.length = ir->length;
366 cp.num_rsp = ir->num_rsp;
367 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
368
369 return 0;
370}
371
372int hci_inquiry(void __user *arg)
373{
374 __u8 __user *ptr = arg;
375 struct hci_inquiry_req ir;
376 struct hci_dev *hdev;
377 int err = 0, do_inquiry = 0, max_rsp;
378 long timeo;
379 __u8 *buf;
380
381 if (copy_from_user(&ir, ptr, sizeof(ir)))
382 return -EFAULT;
383
384 hdev = hci_dev_get(ir.dev_id);
385 if (!hdev)
386 return -ENODEV;
387
388 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
389 err = -EBUSY;
390 goto done;
391 }
392
393 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
394 err = -EOPNOTSUPP;
395 goto done;
396 }
397
398 if (hdev->dev_type != HCI_PRIMARY) {
399 err = -EOPNOTSUPP;
400 goto done;
401 }
402
403 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
404 err = -EOPNOTSUPP;
405 goto done;
406 }
407
408 /* Restrict maximum inquiry length to 60 seconds */
409 if (ir.length > 60) {
410 err = -EINVAL;
411 goto done;
412 }
413
414 hci_dev_lock(hdev);
415 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
416 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
417 hci_inquiry_cache_flush(hdev);
418 do_inquiry = 1;
419 }
420 hci_dev_unlock(hdev);
421
422 timeo = ir.length * msecs_to_jiffies(2000);
423
424 if (do_inquiry) {
425 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
426 timeo, NULL);
427 if (err < 0)
428 goto done;
429
430 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
431 * cleared). If it is interrupted by a signal, return -EINTR.
432 */
433 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
434 TASK_INTERRUPTIBLE)) {
435 err = -EINTR;
436 goto done;
437 }
438 }
439
440 /* for unlimited number of responses we will use buffer with
441 * 255 entries
442 */
443 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
444
445 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
446 * copy it to the user space.
447 */
448 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
449 if (!buf) {
450 err = -ENOMEM;
451 goto done;
452 }
453
454 hci_dev_lock(hdev);
455 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
456 hci_dev_unlock(hdev);
457
458 BT_DBG("num_rsp %d", ir.num_rsp);
459
460 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
461 ptr += sizeof(ir);
462 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
463 ir.num_rsp))
464 err = -EFAULT;
465 } else
466 err = -EFAULT;
467
468 kfree(buf);
469
470done:
471 hci_dev_put(hdev);
472 return err;
473}
474
475static int hci_dev_do_open(struct hci_dev *hdev)
476{
477 int ret = 0;
478
479 BT_DBG("%s %p", hdev->name, hdev);
480
481 hci_req_sync_lock(hdev);
482
483 ret = hci_dev_open_sync(hdev);
484
485 hci_req_sync_unlock(hdev);
486 return ret;
487}
488
489/* ---- HCI ioctl helpers ---- */
490
491int hci_dev_open(__u16 dev)
492{
493 struct hci_dev *hdev;
494 int err;
495
496 hdev = hci_dev_get(dev);
497 if (!hdev)
498 return -ENODEV;
499
500 /* Devices that are marked as unconfigured can only be powered
501 * up as user channel. Trying to bring them up as normal devices
502 * will result into a failure. Only user channel operation is
503 * possible.
504 *
505 * When this function is called for a user channel, the flag
506 * HCI_USER_CHANNEL will be set first before attempting to
507 * open the device.
508 */
509 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
510 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
511 err = -EOPNOTSUPP;
512 goto done;
513 }
514
515 /* We need to ensure that no other power on/off work is pending
516 * before proceeding to call hci_dev_do_open. This is
517 * particularly important if the setup procedure has not yet
518 * completed.
519 */
520 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
521 cancel_delayed_work(&hdev->power_off);
522
523 /* After this call it is guaranteed that the setup procedure
524 * has finished. This means that error conditions like RFKILL
525 * or no valid public or static random address apply.
526 */
527 flush_workqueue(hdev->req_workqueue);
528
529 /* For controllers not using the management interface and that
530 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
531 * so that pairing works for them. Once the management interface
532 * is in use this bit will be cleared again and userspace has
533 * to explicitly enable it.
534 */
535 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
536 !hci_dev_test_flag(hdev, HCI_MGMT))
537 hci_dev_set_flag(hdev, HCI_BONDABLE);
538
539 err = hci_dev_do_open(hdev);
540
541done:
542 hci_dev_put(hdev);
543 return err;
544}
545
546int hci_dev_do_close(struct hci_dev *hdev)
547{
548 int err;
549
550 BT_DBG("%s %p", hdev->name, hdev);
551
552 hci_req_sync_lock(hdev);
553
554 err = hci_dev_close_sync(hdev);
555
556 hci_req_sync_unlock(hdev);
557
558 return err;
559}
560
561int hci_dev_close(__u16 dev)
562{
563 struct hci_dev *hdev;
564 int err;
565
566 hdev = hci_dev_get(dev);
567 if (!hdev)
568 return -ENODEV;
569
570 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
571 err = -EBUSY;
572 goto done;
573 }
574
575 cancel_work_sync(&hdev->power_on);
576 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
577 cancel_delayed_work(&hdev->power_off);
578
579 err = hci_dev_do_close(hdev);
580
581done:
582 hci_dev_put(hdev);
583 return err;
584}
585
586static int hci_dev_do_reset(struct hci_dev *hdev)
587{
588 int ret;
589
590 BT_DBG("%s %p", hdev->name, hdev);
591
592 hci_req_sync_lock(hdev);
593
594 /* Drop queues */
595 skb_queue_purge(&hdev->rx_q);
596 skb_queue_purge(&hdev->cmd_q);
597
598 /* Cancel these to avoid queueing non-chained pending work */
599 hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
600 /* Wait for
601 *
602 * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
603 * queue_delayed_work(&hdev->{cmd,ncmd}_timer)
604 *
605 * inside RCU section to see the flag or complete scheduling.
606 */
607 synchronize_rcu();
608 /* Explicitly cancel works in case scheduled after setting the flag. */
609 cancel_delayed_work(&hdev->cmd_timer);
610 cancel_delayed_work(&hdev->ncmd_timer);
611
612 /* Avoid potential lockdep warnings from the *_flush() calls by
613 * ensuring the workqueue is empty up front.
614 */
615 drain_workqueue(hdev->workqueue);
616
617 hci_dev_lock(hdev);
618 hci_inquiry_cache_flush(hdev);
619 hci_conn_hash_flush(hdev);
620 hci_dev_unlock(hdev);
621
622 if (hdev->flush)
623 hdev->flush(hdev);
624
625 hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
626
627 atomic_set(&hdev->cmd_cnt, 1);
628 hdev->acl_cnt = 0;
629 hdev->sco_cnt = 0;
630 hdev->le_cnt = 0;
631 hdev->iso_cnt = 0;
632
633 ret = hci_reset_sync(hdev);
634
635 hci_req_sync_unlock(hdev);
636 return ret;
637}
638
639int hci_dev_reset(__u16 dev)
640{
641 struct hci_dev *hdev;
642 int err;
643
644 hdev = hci_dev_get(dev);
645 if (!hdev)
646 return -ENODEV;
647
648 if (!test_bit(HCI_UP, &hdev->flags)) {
649 err = -ENETDOWN;
650 goto done;
651 }
652
653 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
654 err = -EBUSY;
655 goto done;
656 }
657
658 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
659 err = -EOPNOTSUPP;
660 goto done;
661 }
662
663 err = hci_dev_do_reset(hdev);
664
665done:
666 hci_dev_put(hdev);
667 return err;
668}
669
670int hci_dev_reset_stat(__u16 dev)
671{
672 struct hci_dev *hdev;
673 int ret = 0;
674
675 hdev = hci_dev_get(dev);
676 if (!hdev)
677 return -ENODEV;
678
679 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
680 ret = -EBUSY;
681 goto done;
682 }
683
684 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
685 ret = -EOPNOTSUPP;
686 goto done;
687 }
688
689 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
690
691done:
692 hci_dev_put(hdev);
693 return ret;
694}
695
696static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan)
697{
698 bool conn_changed, discov_changed;
699
700 BT_DBG("%s scan 0x%02x", hdev->name, scan);
701
702 if ((scan & SCAN_PAGE))
703 conn_changed = !hci_dev_test_and_set_flag(hdev,
704 HCI_CONNECTABLE);
705 else
706 conn_changed = hci_dev_test_and_clear_flag(hdev,
707 HCI_CONNECTABLE);
708
709 if ((scan & SCAN_INQUIRY)) {
710 discov_changed = !hci_dev_test_and_set_flag(hdev,
711 HCI_DISCOVERABLE);
712 } else {
713 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
714 discov_changed = hci_dev_test_and_clear_flag(hdev,
715 HCI_DISCOVERABLE);
716 }
717
718 if (!hci_dev_test_flag(hdev, HCI_MGMT))
719 return;
720
721 if (conn_changed || discov_changed) {
722 /* In case this was disabled through mgmt */
723 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
724
725 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
726 hci_update_adv_data(hdev, hdev->cur_adv_instance);
727
728 mgmt_new_settings(hdev);
729 }
730}
731
732int hci_dev_cmd(unsigned int cmd, void __user *arg)
733{
734 struct hci_dev *hdev;
735 struct hci_dev_req dr;
736 int err = 0;
737
738 if (copy_from_user(&dr, arg, sizeof(dr)))
739 return -EFAULT;
740
741 hdev = hci_dev_get(dr.dev_id);
742 if (!hdev)
743 return -ENODEV;
744
745 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
746 err = -EBUSY;
747 goto done;
748 }
749
750 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
751 err = -EOPNOTSUPP;
752 goto done;
753 }
754
755 if (hdev->dev_type != HCI_PRIMARY) {
756 err = -EOPNOTSUPP;
757 goto done;
758 }
759
760 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
761 err = -EOPNOTSUPP;
762 goto done;
763 }
764
765 switch (cmd) {
766 case HCISETAUTH:
767 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
768 HCI_INIT_TIMEOUT, NULL);
769 break;
770
771 case HCISETENCRYPT:
772 if (!lmp_encrypt_capable(hdev)) {
773 err = -EOPNOTSUPP;
774 break;
775 }
776
777 if (!test_bit(HCI_AUTH, &hdev->flags)) {
778 /* Auth must be enabled first */
779 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
780 HCI_INIT_TIMEOUT, NULL);
781 if (err)
782 break;
783 }
784
785 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
786 HCI_INIT_TIMEOUT, NULL);
787 break;
788
789 case HCISETSCAN:
790 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
791 HCI_INIT_TIMEOUT, NULL);
792
793 /* Ensure that the connectable and discoverable states
794 * get correctly modified as this was a non-mgmt change.
795 */
796 if (!err)
797 hci_update_passive_scan_state(hdev, dr.dev_opt);
798 break;
799
800 case HCISETLINKPOL:
801 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
802 HCI_INIT_TIMEOUT, NULL);
803 break;
804
805 case HCISETLINKMODE:
806 hdev->link_mode = ((__u16) dr.dev_opt) &
807 (HCI_LM_MASTER | HCI_LM_ACCEPT);
808 break;
809
810 case HCISETPTYPE:
811 if (hdev->pkt_type == (__u16) dr.dev_opt)
812 break;
813
814 hdev->pkt_type = (__u16) dr.dev_opt;
815 mgmt_phy_configuration_changed(hdev, NULL);
816 break;
817
818 case HCISETACLMTU:
819 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
820 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
821 break;
822
823 case HCISETSCOMTU:
824 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
825 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
826 break;
827
828 default:
829 err = -EINVAL;
830 break;
831 }
832
833done:
834 hci_dev_put(hdev);
835 return err;
836}
837
838int hci_get_dev_list(void __user *arg)
839{
840 struct hci_dev *hdev;
841 struct hci_dev_list_req *dl;
842 struct hci_dev_req *dr;
843 int n = 0, size, err;
844 __u16 dev_num;
845
846 if (get_user(dev_num, (__u16 __user *) arg))
847 return -EFAULT;
848
849 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
850 return -EINVAL;
851
852 size = sizeof(*dl) + dev_num * sizeof(*dr);
853
854 dl = kzalloc(size, GFP_KERNEL);
855 if (!dl)
856 return -ENOMEM;
857
858 dr = dl->dev_req;
859
860 read_lock(&hci_dev_list_lock);
861 list_for_each_entry(hdev, &hci_dev_list, list) {
862 unsigned long flags = hdev->flags;
863
864 /* When the auto-off is configured it means the transport
865 * is running, but in that case still indicate that the
866 * device is actually down.
867 */
868 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
869 flags &= ~BIT(HCI_UP);
870
871 (dr + n)->dev_id = hdev->id;
872 (dr + n)->dev_opt = flags;
873
874 if (++n >= dev_num)
875 break;
876 }
877 read_unlock(&hci_dev_list_lock);
878
879 dl->dev_num = n;
880 size = sizeof(*dl) + n * sizeof(*dr);
881
882 err = copy_to_user(arg, dl, size);
883 kfree(dl);
884
885 return err ? -EFAULT : 0;
886}
887
888int hci_get_dev_info(void __user *arg)
889{
890 struct hci_dev *hdev;
891 struct hci_dev_info di;
892 unsigned long flags;
893 int err = 0;
894
895 if (copy_from_user(&di, arg, sizeof(di)))
896 return -EFAULT;
897
898 hdev = hci_dev_get(di.dev_id);
899 if (!hdev)
900 return -ENODEV;
901
902 /* When the auto-off is configured it means the transport
903 * is running, but in that case still indicate that the
904 * device is actually down.
905 */
906 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
907 flags = hdev->flags & ~BIT(HCI_UP);
908 else
909 flags = hdev->flags;
910
911 strcpy(di.name, hdev->name);
912 di.bdaddr = hdev->bdaddr;
913 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
914 di.flags = flags;
915 di.pkt_type = hdev->pkt_type;
916 if (lmp_bredr_capable(hdev)) {
917 di.acl_mtu = hdev->acl_mtu;
918 di.acl_pkts = hdev->acl_pkts;
919 di.sco_mtu = hdev->sco_mtu;
920 di.sco_pkts = hdev->sco_pkts;
921 } else {
922 di.acl_mtu = hdev->le_mtu;
923 di.acl_pkts = hdev->le_pkts;
924 di.sco_mtu = 0;
925 di.sco_pkts = 0;
926 }
927 di.link_policy = hdev->link_policy;
928 di.link_mode = hdev->link_mode;
929
930 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
931 memcpy(&di.features, &hdev->features, sizeof(di.features));
932
933 if (copy_to_user(arg, &di, sizeof(di)))
934 err = -EFAULT;
935
936 hci_dev_put(hdev);
937
938 return err;
939}
940
941/* ---- Interface to HCI drivers ---- */
942
943static int hci_rfkill_set_block(void *data, bool blocked)
944{
945 struct hci_dev *hdev = data;
946
947 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
948
949 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
950 return -EBUSY;
951
952 if (blocked) {
953 hci_dev_set_flag(hdev, HCI_RFKILLED);
954 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
955 !hci_dev_test_flag(hdev, HCI_CONFIG))
956 hci_dev_do_close(hdev);
957 } else {
958 hci_dev_clear_flag(hdev, HCI_RFKILLED);
959 }
960
961 return 0;
962}
963
964static const struct rfkill_ops hci_rfkill_ops = {
965 .set_block = hci_rfkill_set_block,
966};
967
968static void hci_power_on(struct work_struct *work)
969{
970 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
971 int err;
972
973 BT_DBG("%s", hdev->name);
974
975 if (test_bit(HCI_UP, &hdev->flags) &&
976 hci_dev_test_flag(hdev, HCI_MGMT) &&
977 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
978 cancel_delayed_work(&hdev->power_off);
979 err = hci_powered_update_sync(hdev);
980 mgmt_power_on(hdev, err);
981 return;
982 }
983
984 err = hci_dev_do_open(hdev);
985 if (err < 0) {
986 hci_dev_lock(hdev);
987 mgmt_set_powered_failed(hdev, err);
988 hci_dev_unlock(hdev);
989 return;
990 }
991
992 /* During the HCI setup phase, a few error conditions are
993 * ignored and they need to be checked now. If they are still
994 * valid, it is important to turn the device back off.
995 */
996 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
997 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
998 (hdev->dev_type == HCI_PRIMARY &&
999 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1000 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
1001 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
1002 hci_dev_do_close(hdev);
1003 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
1004 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1005 HCI_AUTO_OFF_TIMEOUT);
1006 }
1007
1008 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
1009 /* For unconfigured devices, set the HCI_RAW flag
1010 * so that userspace can easily identify them.
1011 */
1012 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1013 set_bit(HCI_RAW, &hdev->flags);
1014
1015 /* For fully configured devices, this will send
1016 * the Index Added event. For unconfigured devices,
1017 * it will send Unconfigued Index Added event.
1018 *
1019 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
1020 * and no event will be send.
1021 */
1022 mgmt_index_added(hdev);
1023 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
1024 /* When the controller is now configured, then it
1025 * is important to clear the HCI_RAW flag.
1026 */
1027 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1028 clear_bit(HCI_RAW, &hdev->flags);
1029
1030 /* Powering on the controller with HCI_CONFIG set only
1031 * happens with the transition from unconfigured to
1032 * configured. This will send the Index Added event.
1033 */
1034 mgmt_index_added(hdev);
1035 }
1036}
1037
1038static void hci_power_off(struct work_struct *work)
1039{
1040 struct hci_dev *hdev = container_of(work, struct hci_dev,
1041 power_off.work);
1042
1043 BT_DBG("%s", hdev->name);
1044
1045 hci_dev_do_close(hdev);
1046}
1047
1048static void hci_error_reset(struct work_struct *work)
1049{
1050 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
1051
1052 hci_dev_hold(hdev);
1053 BT_DBG("%s", hdev->name);
1054
1055 if (hdev->hw_error)
1056 hdev->hw_error(hdev, hdev->hw_error_code);
1057 else
1058 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
1059
1060 if (!hci_dev_do_close(hdev))
1061 hci_dev_do_open(hdev);
1062
1063 hci_dev_put(hdev);
1064}
1065
1066void hci_uuids_clear(struct hci_dev *hdev)
1067{
1068 struct bt_uuid *uuid, *tmp;
1069
1070 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1071 list_del(&uuid->list);
1072 kfree(uuid);
1073 }
1074}
1075
1076void hci_link_keys_clear(struct hci_dev *hdev)
1077{
1078 struct link_key *key, *tmp;
1079
1080 list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
1081 list_del_rcu(&key->list);
1082 kfree_rcu(key, rcu);
1083 }
1084}
1085
1086void hci_smp_ltks_clear(struct hci_dev *hdev)
1087{
1088 struct smp_ltk *k, *tmp;
1089
1090 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1091 list_del_rcu(&k->list);
1092 kfree_rcu(k, rcu);
1093 }
1094}
1095
1096void hci_smp_irks_clear(struct hci_dev *hdev)
1097{
1098 struct smp_irk *k, *tmp;
1099
1100 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1101 list_del_rcu(&k->list);
1102 kfree_rcu(k, rcu);
1103 }
1104}
1105
1106void hci_blocked_keys_clear(struct hci_dev *hdev)
1107{
1108 struct blocked_key *b, *tmp;
1109
1110 list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
1111 list_del_rcu(&b->list);
1112 kfree_rcu(b, rcu);
1113 }
1114}
1115
1116bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
1117{
1118 bool blocked = false;
1119 struct blocked_key *b;
1120
1121 rcu_read_lock();
1122 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
1123 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
1124 blocked = true;
1125 break;
1126 }
1127 }
1128
1129 rcu_read_unlock();
1130 return blocked;
1131}
1132
1133struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1134{
1135 struct link_key *k;
1136
1137 rcu_read_lock();
1138 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
1139 if (bacmp(bdaddr, &k->bdaddr) == 0) {
1140 rcu_read_unlock();
1141
1142 if (hci_is_blocked_key(hdev,
1143 HCI_BLOCKED_KEY_TYPE_LINKKEY,
1144 k->val)) {
1145 bt_dev_warn_ratelimited(hdev,
1146 "Link key blocked for %pMR",
1147 &k->bdaddr);
1148 return NULL;
1149 }
1150
1151 return k;
1152 }
1153 }
1154 rcu_read_unlock();
1155
1156 return NULL;
1157}
1158
1159static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1160 u8 key_type, u8 old_key_type)
1161{
1162 /* Legacy key */
1163 if (key_type < 0x03)
1164 return true;
1165
1166 /* Debug keys are insecure so don't store them persistently */
1167 if (key_type == HCI_LK_DEBUG_COMBINATION)
1168 return false;
1169
1170 /* Changed combination key and there's no previous one */
1171 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1172 return false;
1173
1174 /* Security mode 3 case */
1175 if (!conn)
1176 return true;
1177
1178 /* BR/EDR key derived using SC from an LE link */
1179 if (conn->type == LE_LINK)
1180 return true;
1181
1182 /* Neither local nor remote side had no-bonding as requirement */
1183 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1184 return true;
1185
1186 /* Local side had dedicated bonding as requirement */
1187 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1188 return true;
1189
1190 /* Remote side had dedicated bonding as requirement */
1191 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1192 return true;
1193
1194 /* If none of the above criteria match, then don't store the key
1195 * persistently */
1196 return false;
1197}
1198
1199static u8 ltk_role(u8 type)
1200{
1201 if (type == SMP_LTK)
1202 return HCI_ROLE_MASTER;
1203
1204 return HCI_ROLE_SLAVE;
1205}
1206
1207struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1208 u8 addr_type, u8 role)
1209{
1210 struct smp_ltk *k;
1211
1212 rcu_read_lock();
1213 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1214 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
1215 continue;
1216
1217 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
1218 rcu_read_unlock();
1219
1220 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
1221 k->val)) {
1222 bt_dev_warn_ratelimited(hdev,
1223 "LTK blocked for %pMR",
1224 &k->bdaddr);
1225 return NULL;
1226 }
1227
1228 return k;
1229 }
1230 }
1231 rcu_read_unlock();
1232
1233 return NULL;
1234}
1235
1236struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
1237{
1238 struct smp_irk *irk_to_return = NULL;
1239 struct smp_irk *irk;
1240
1241 rcu_read_lock();
1242 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1243 if (!bacmp(&irk->rpa, rpa)) {
1244 irk_to_return = irk;
1245 goto done;
1246 }
1247 }
1248
1249 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1250 if (smp_irk_matches(hdev, irk->val, rpa)) {
1251 bacpy(&irk->rpa, rpa);
1252 irk_to_return = irk;
1253 goto done;
1254 }
1255 }
1256
1257done:
1258 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1259 irk_to_return->val)) {
1260 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1261 &irk_to_return->bdaddr);
1262 irk_to_return = NULL;
1263 }
1264
1265 rcu_read_unlock();
1266
1267 return irk_to_return;
1268}
1269
1270struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1271 u8 addr_type)
1272{
1273 struct smp_irk *irk_to_return = NULL;
1274 struct smp_irk *irk;
1275
1276 /* Identity Address must be public or static random */
1277 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
1278 return NULL;
1279
1280 rcu_read_lock();
1281 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1282 if (addr_type == irk->addr_type &&
1283 bacmp(bdaddr, &irk->bdaddr) == 0) {
1284 irk_to_return = irk;
1285 goto done;
1286 }
1287 }
1288
1289done:
1290
1291 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1292 irk_to_return->val)) {
1293 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1294 &irk_to_return->bdaddr);
1295 irk_to_return = NULL;
1296 }
1297
1298 rcu_read_unlock();
1299
1300 return irk_to_return;
1301}
1302
1303struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1304 bdaddr_t *bdaddr, u8 *val, u8 type,
1305 u8 pin_len, bool *persistent)
1306{
1307 struct link_key *key, *old_key;
1308 u8 old_key_type;
1309
1310 old_key = hci_find_link_key(hdev, bdaddr);
1311 if (old_key) {
1312 old_key_type = old_key->type;
1313 key = old_key;
1314 } else {
1315 old_key_type = conn ? conn->key_type : 0xff;
1316 key = kzalloc(sizeof(*key), GFP_KERNEL);
1317 if (!key)
1318 return NULL;
1319 list_add_rcu(&key->list, &hdev->link_keys);
1320 }
1321
1322 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1323
1324 /* Some buggy controller combinations generate a changed
1325 * combination key for legacy pairing even when there's no
1326 * previous key */
1327 if (type == HCI_LK_CHANGED_COMBINATION &&
1328 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1329 type = HCI_LK_COMBINATION;
1330 if (conn)
1331 conn->key_type = type;
1332 }
1333
1334 bacpy(&key->bdaddr, bdaddr);
1335 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1336 key->pin_len = pin_len;
1337
1338 if (type == HCI_LK_CHANGED_COMBINATION)
1339 key->type = old_key_type;
1340 else
1341 key->type = type;
1342
1343 if (persistent)
1344 *persistent = hci_persistent_key(hdev, conn, type,
1345 old_key_type);
1346
1347 return key;
1348}
1349
1350struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1351 u8 addr_type, u8 type, u8 authenticated,
1352 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
1353{
1354 struct smp_ltk *key, *old_key;
1355 u8 role = ltk_role(type);
1356
1357 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
1358 if (old_key)
1359 key = old_key;
1360 else {
1361 key = kzalloc(sizeof(*key), GFP_KERNEL);
1362 if (!key)
1363 return NULL;
1364 list_add_rcu(&key->list, &hdev->long_term_keys);
1365 }
1366
1367 bacpy(&key->bdaddr, bdaddr);
1368 key->bdaddr_type = addr_type;
1369 memcpy(key->val, tk, sizeof(key->val));
1370 key->authenticated = authenticated;
1371 key->ediv = ediv;
1372 key->rand = rand;
1373 key->enc_size = enc_size;
1374 key->type = type;
1375
1376 return key;
1377}
1378
1379struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1380 u8 addr_type, u8 val[16], bdaddr_t *rpa)
1381{
1382 struct smp_irk *irk;
1383
1384 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
1385 if (!irk) {
1386 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
1387 if (!irk)
1388 return NULL;
1389
1390 bacpy(&irk->bdaddr, bdaddr);
1391 irk->addr_type = addr_type;
1392
1393 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
1394 }
1395
1396 memcpy(irk->val, val, 16);
1397 bacpy(&irk->rpa, rpa);
1398
1399 return irk;
1400}
1401
1402int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1403{
1404 struct link_key *key;
1405
1406 key = hci_find_link_key(hdev, bdaddr);
1407 if (!key)
1408 return -ENOENT;
1409
1410 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1411
1412 list_del_rcu(&key->list);
1413 kfree_rcu(key, rcu);
1414
1415 return 0;
1416}
1417
1418int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
1419{
1420 struct smp_ltk *k, *tmp;
1421 int removed = 0;
1422
1423 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1424 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
1425 continue;
1426
1427 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1428
1429 list_del_rcu(&k->list);
1430 kfree_rcu(k, rcu);
1431 removed++;
1432 }
1433
1434 return removed ? 0 : -ENOENT;
1435}
1436
1437void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
1438{
1439 struct smp_irk *k, *tmp;
1440
1441 list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1442 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
1443 continue;
1444
1445 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1446
1447 list_del_rcu(&k->list);
1448 kfree_rcu(k, rcu);
1449 }
1450}
1451
1452bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1453{
1454 struct smp_ltk *k;
1455 struct smp_irk *irk;
1456 u8 addr_type;
1457
1458 if (type == BDADDR_BREDR) {
1459 if (hci_find_link_key(hdev, bdaddr))
1460 return true;
1461 return false;
1462 }
1463
1464 /* Convert to HCI addr type which struct smp_ltk uses */
1465 if (type == BDADDR_LE_PUBLIC)
1466 addr_type = ADDR_LE_DEV_PUBLIC;
1467 else
1468 addr_type = ADDR_LE_DEV_RANDOM;
1469
1470 irk = hci_get_irk(hdev, bdaddr, addr_type);
1471 if (irk) {
1472 bdaddr = &irk->bdaddr;
1473 addr_type = irk->addr_type;
1474 }
1475
1476 rcu_read_lock();
1477 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1478 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
1479 rcu_read_unlock();
1480 return true;
1481 }
1482 }
1483 rcu_read_unlock();
1484
1485 return false;
1486}
1487
1488/* HCI command timer function */
1489static void hci_cmd_timeout(struct work_struct *work)
1490{
1491 struct hci_dev *hdev = container_of(work, struct hci_dev,
1492 cmd_timer.work);
1493
1494 if (hdev->sent_cmd) {
1495 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1496 u16 opcode = __le16_to_cpu(sent->opcode);
1497
1498 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
1499 } else {
1500 bt_dev_err(hdev, "command tx timeout");
1501 }
1502
1503 if (hdev->cmd_timeout)
1504 hdev->cmd_timeout(hdev);
1505
1506 atomic_set(&hdev->cmd_cnt, 1);
1507 queue_work(hdev->workqueue, &hdev->cmd_work);
1508}
1509
1510/* HCI ncmd timer function */
1511static void hci_ncmd_timeout(struct work_struct *work)
1512{
1513 struct hci_dev *hdev = container_of(work, struct hci_dev,
1514 ncmd_timer.work);
1515
1516 bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0");
1517
1518 /* During HCI_INIT phase no events can be injected if the ncmd timer
1519 * triggers since the procedure has its own timeout handling.
1520 */
1521 if (test_bit(HCI_INIT, &hdev->flags))
1522 return;
1523
1524 /* This is an irrecoverable state, inject hardware error event */
1525 hci_reset_dev(hdev);
1526}
1527
1528struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1529 bdaddr_t *bdaddr, u8 bdaddr_type)
1530{
1531 struct oob_data *data;
1532
1533 list_for_each_entry(data, &hdev->remote_oob_data, list) {
1534 if (bacmp(bdaddr, &data->bdaddr) != 0)
1535 continue;
1536 if (data->bdaddr_type != bdaddr_type)
1537 continue;
1538 return data;
1539 }
1540
1541 return NULL;
1542}
1543
1544int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1545 u8 bdaddr_type)
1546{
1547 struct oob_data *data;
1548
1549 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1550 if (!data)
1551 return -ENOENT;
1552
1553 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
1554
1555 list_del(&data->list);
1556 kfree(data);
1557
1558 return 0;
1559}
1560
1561void hci_remote_oob_data_clear(struct hci_dev *hdev)
1562{
1563 struct oob_data *data, *n;
1564
1565 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1566 list_del(&data->list);
1567 kfree(data);
1568 }
1569}
1570
1571int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1572 u8 bdaddr_type, u8 *hash192, u8 *rand192,
1573 u8 *hash256, u8 *rand256)
1574{
1575 struct oob_data *data;
1576
1577 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1578 if (!data) {
1579 data = kmalloc(sizeof(*data), GFP_KERNEL);
1580 if (!data)
1581 return -ENOMEM;
1582
1583 bacpy(&data->bdaddr, bdaddr);
1584 data->bdaddr_type = bdaddr_type;
1585 list_add(&data->list, &hdev->remote_oob_data);
1586 }
1587
1588 if (hash192 && rand192) {
1589 memcpy(data->hash192, hash192, sizeof(data->hash192));
1590 memcpy(data->rand192, rand192, sizeof(data->rand192));
1591 if (hash256 && rand256)
1592 data->present = 0x03;
1593 } else {
1594 memset(data->hash192, 0, sizeof(data->hash192));
1595 memset(data->rand192, 0, sizeof(data->rand192));
1596 if (hash256 && rand256)
1597 data->present = 0x02;
1598 else
1599 data->present = 0x00;
1600 }
1601
1602 if (hash256 && rand256) {
1603 memcpy(data->hash256, hash256, sizeof(data->hash256));
1604 memcpy(data->rand256, rand256, sizeof(data->rand256));
1605 } else {
1606 memset(data->hash256, 0, sizeof(data->hash256));
1607 memset(data->rand256, 0, sizeof(data->rand256));
1608 if (hash192 && rand192)
1609 data->present = 0x01;
1610 }
1611
1612 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1613
1614 return 0;
1615}
1616
1617/* This function requires the caller holds hdev->lock */
1618struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
1619{
1620 struct adv_info *adv_instance;
1621
1622 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
1623 if (adv_instance->instance == instance)
1624 return adv_instance;
1625 }
1626
1627 return NULL;
1628}
1629
1630/* This function requires the caller holds hdev->lock */
1631struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
1632{
1633 struct adv_info *cur_instance;
1634
1635 cur_instance = hci_find_adv_instance(hdev, instance);
1636 if (!cur_instance)
1637 return NULL;
1638
1639 if (cur_instance == list_last_entry(&hdev->adv_instances,
1640 struct adv_info, list))
1641 return list_first_entry(&hdev->adv_instances,
1642 struct adv_info, list);
1643 else
1644 return list_next_entry(cur_instance, list);
1645}
1646
1647/* This function requires the caller holds hdev->lock */
1648int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
1649{
1650 struct adv_info *adv_instance;
1651
1652 adv_instance = hci_find_adv_instance(hdev, instance);
1653 if (!adv_instance)
1654 return -ENOENT;
1655
1656 BT_DBG("%s removing %dMR", hdev->name, instance);
1657
1658 if (hdev->cur_adv_instance == instance) {
1659 if (hdev->adv_instance_timeout) {
1660 cancel_delayed_work(&hdev->adv_instance_expire);
1661 hdev->adv_instance_timeout = 0;
1662 }
1663 hdev->cur_adv_instance = 0x00;
1664 }
1665
1666 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1667
1668 list_del(&adv_instance->list);
1669 kfree(adv_instance);
1670
1671 hdev->adv_instance_cnt--;
1672
1673 return 0;
1674}
1675
1676void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
1677{
1678 struct adv_info *adv_instance, *n;
1679
1680 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
1681 adv_instance->rpa_expired = rpa_expired;
1682}
1683
1684/* This function requires the caller holds hdev->lock */
1685void hci_adv_instances_clear(struct hci_dev *hdev)
1686{
1687 struct adv_info *adv_instance, *n;
1688
1689 if (hdev->adv_instance_timeout) {
1690 cancel_delayed_work(&hdev->adv_instance_expire);
1691 hdev->adv_instance_timeout = 0;
1692 }
1693
1694 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
1695 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1696 list_del(&adv_instance->list);
1697 kfree(adv_instance);
1698 }
1699
1700 hdev->adv_instance_cnt = 0;
1701 hdev->cur_adv_instance = 0x00;
1702}
1703
1704static void adv_instance_rpa_expired(struct work_struct *work)
1705{
1706 struct adv_info *adv_instance = container_of(work, struct adv_info,
1707 rpa_expired_cb.work);
1708
1709 BT_DBG("");
1710
1711 adv_instance->rpa_expired = true;
1712}
1713
1714/* This function requires the caller holds hdev->lock */
1715struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1716 u32 flags, u16 adv_data_len, u8 *adv_data,
1717 u16 scan_rsp_len, u8 *scan_rsp_data,
1718 u16 timeout, u16 duration, s8 tx_power,
1719 u32 min_interval, u32 max_interval,
1720 u8 mesh_handle)
1721{
1722 struct adv_info *adv;
1723
1724 adv = hci_find_adv_instance(hdev, instance);
1725 if (adv) {
1726 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1727 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1728 memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data));
1729 } else {
1730 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
1731 instance < 1 || instance > hdev->le_num_of_adv_sets + 1)
1732 return ERR_PTR(-EOVERFLOW);
1733
1734 adv = kzalloc(sizeof(*adv), GFP_KERNEL);
1735 if (!adv)
1736 return ERR_PTR(-ENOMEM);
1737
1738 adv->pending = true;
1739 adv->instance = instance;
1740 list_add(&adv->list, &hdev->adv_instances);
1741 hdev->adv_instance_cnt++;
1742 }
1743
1744 adv->flags = flags;
1745 adv->min_interval = min_interval;
1746 adv->max_interval = max_interval;
1747 adv->tx_power = tx_power;
1748 /* Defining a mesh_handle changes the timing units to ms,
1749 * rather than seconds, and ties the instance to the requested
1750 * mesh_tx queue.
1751 */
1752 adv->mesh = mesh_handle;
1753
1754 hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
1755 scan_rsp_len, scan_rsp_data);
1756
1757 adv->timeout = timeout;
1758 adv->remaining_time = timeout;
1759
1760 if (duration == 0)
1761 adv->duration = hdev->def_multi_adv_rotation_duration;
1762 else
1763 adv->duration = duration;
1764
1765 INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
1766
1767 BT_DBG("%s for %dMR", hdev->name, instance);
1768
1769 return adv;
1770}
1771
1772/* This function requires the caller holds hdev->lock */
1773struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1774 u32 flags, u8 data_len, u8 *data,
1775 u32 min_interval, u32 max_interval)
1776{
1777 struct adv_info *adv;
1778
1779 adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL,
1780 0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE,
1781 min_interval, max_interval, 0);
1782 if (IS_ERR(adv))
1783 return adv;
1784
1785 adv->periodic = true;
1786 adv->per_adv_data_len = data_len;
1787
1788 if (data)
1789 memcpy(adv->per_adv_data, data, data_len);
1790
1791 return adv;
1792}
1793
1794/* This function requires the caller holds hdev->lock */
1795int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1796 u16 adv_data_len, u8 *adv_data,
1797 u16 scan_rsp_len, u8 *scan_rsp_data)
1798{
1799 struct adv_info *adv;
1800
1801 adv = hci_find_adv_instance(hdev, instance);
1802
1803 /* If advertisement doesn't exist, we can't modify its data */
1804 if (!adv)
1805 return -ENOENT;
1806
1807 if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) {
1808 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1809 memcpy(adv->adv_data, adv_data, adv_data_len);
1810 adv->adv_data_len = adv_data_len;
1811 adv->adv_data_changed = true;
1812 }
1813
1814 if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) {
1815 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1816 memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len);
1817 adv->scan_rsp_len = scan_rsp_len;
1818 adv->scan_rsp_changed = true;
1819 }
1820
1821 /* Mark as changed if there are flags which would affect it */
1822 if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) ||
1823 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1824 adv->scan_rsp_changed = true;
1825
1826 return 0;
1827}
1828
1829/* This function requires the caller holds hdev->lock */
1830u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance)
1831{
1832 u32 flags;
1833 struct adv_info *adv;
1834
1835 if (instance == 0x00) {
1836 /* Instance 0 always manages the "Tx Power" and "Flags"
1837 * fields
1838 */
1839 flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
1840
1841 /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
1842 * corresponds to the "connectable" instance flag.
1843 */
1844 if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
1845 flags |= MGMT_ADV_FLAG_CONNECTABLE;
1846
1847 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
1848 flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
1849 else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
1850 flags |= MGMT_ADV_FLAG_DISCOV;
1851
1852 return flags;
1853 }
1854
1855 adv = hci_find_adv_instance(hdev, instance);
1856
1857 /* Return 0 when we got an invalid instance identifier. */
1858 if (!adv)
1859 return 0;
1860
1861 return adv->flags;
1862}
1863
1864bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance)
1865{
1866 struct adv_info *adv;
1867
1868 /* Instance 0x00 always set local name */
1869 if (instance == 0x00)
1870 return true;
1871
1872 adv = hci_find_adv_instance(hdev, instance);
1873 if (!adv)
1874 return false;
1875
1876 if (adv->flags & MGMT_ADV_FLAG_APPEARANCE ||
1877 adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1878 return true;
1879
1880 return adv->scan_rsp_len ? true : false;
1881}
1882
1883/* This function requires the caller holds hdev->lock */
1884void hci_adv_monitors_clear(struct hci_dev *hdev)
1885{
1886 struct adv_monitor *monitor;
1887 int handle;
1888
1889 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
1890 hci_free_adv_monitor(hdev, monitor);
1891
1892 idr_destroy(&hdev->adv_monitors_idr);
1893}
1894
1895/* Frees the monitor structure and do some bookkeepings.
1896 * This function requires the caller holds hdev->lock.
1897 */
1898void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1899{
1900 struct adv_pattern *pattern;
1901 struct adv_pattern *tmp;
1902
1903 if (!monitor)
1904 return;
1905
1906 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
1907 list_del(&pattern->list);
1908 kfree(pattern);
1909 }
1910
1911 if (monitor->handle)
1912 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
1913
1914 if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
1915 hdev->adv_monitors_cnt--;
1916 mgmt_adv_monitor_removed(hdev, monitor->handle);
1917 }
1918
1919 kfree(monitor);
1920}
1921
1922/* Assigns handle to a monitor, and if offloading is supported and power is on,
1923 * also attempts to forward the request to the controller.
1924 * This function requires the caller holds hci_req_sync_lock.
1925 */
1926int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1927{
1928 int min, max, handle;
1929 int status = 0;
1930
1931 if (!monitor)
1932 return -EINVAL;
1933
1934 hci_dev_lock(hdev);
1935
1936 min = HCI_MIN_ADV_MONITOR_HANDLE;
1937 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
1938 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
1939 GFP_KERNEL);
1940
1941 hci_dev_unlock(hdev);
1942
1943 if (handle < 0)
1944 return handle;
1945
1946 monitor->handle = handle;
1947
1948 if (!hdev_is_powered(hdev))
1949 return status;
1950
1951 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1952 case HCI_ADV_MONITOR_EXT_NONE:
1953 bt_dev_dbg(hdev, "add monitor %d status %d",
1954 monitor->handle, status);
1955 /* Message was not forwarded to controller - not an error */
1956 break;
1957
1958 case HCI_ADV_MONITOR_EXT_MSFT:
1959 status = msft_add_monitor_pattern(hdev, monitor);
1960 bt_dev_dbg(hdev, "add monitor %d msft status %d",
1961 handle, status);
1962 break;
1963 }
1964
1965 return status;
1966}
1967
1968/* Attempts to tell the controller and free the monitor. If somehow the
1969 * controller doesn't have a corresponding handle, remove anyway.
1970 * This function requires the caller holds hci_req_sync_lock.
1971 */
1972static int hci_remove_adv_monitor(struct hci_dev *hdev,
1973 struct adv_monitor *monitor)
1974{
1975 int status = 0;
1976 int handle;
1977
1978 switch (hci_get_adv_monitor_offload_ext(hdev)) {
1979 case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
1980 bt_dev_dbg(hdev, "remove monitor %d status %d",
1981 monitor->handle, status);
1982 goto free_monitor;
1983
1984 case HCI_ADV_MONITOR_EXT_MSFT:
1985 handle = monitor->handle;
1986 status = msft_remove_monitor(hdev, monitor);
1987 bt_dev_dbg(hdev, "remove monitor %d msft status %d",
1988 handle, status);
1989 break;
1990 }
1991
1992 /* In case no matching handle registered, just free the monitor */
1993 if (status == -ENOENT)
1994 goto free_monitor;
1995
1996 return status;
1997
1998free_monitor:
1999 if (status == -ENOENT)
2000 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
2001 monitor->handle);
2002 hci_free_adv_monitor(hdev, monitor);
2003
2004 return status;
2005}
2006
2007/* This function requires the caller holds hci_req_sync_lock */
2008int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle)
2009{
2010 struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
2011
2012 if (!monitor)
2013 return -EINVAL;
2014
2015 return hci_remove_adv_monitor(hdev, monitor);
2016}
2017
2018/* This function requires the caller holds hci_req_sync_lock */
2019int hci_remove_all_adv_monitor(struct hci_dev *hdev)
2020{
2021 struct adv_monitor *monitor;
2022 int idr_next_id = 0;
2023 int status = 0;
2024
2025 while (1) {
2026 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
2027 if (!monitor)
2028 break;
2029
2030 status = hci_remove_adv_monitor(hdev, monitor);
2031 if (status)
2032 return status;
2033
2034 idr_next_id++;
2035 }
2036
2037 return status;
2038}
2039
2040/* This function requires the caller holds hdev->lock */
2041bool hci_is_adv_monitoring(struct hci_dev *hdev)
2042{
2043 return !idr_is_empty(&hdev->adv_monitors_idr);
2044}
2045
2046int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
2047{
2048 if (msft_monitor_supported(hdev))
2049 return HCI_ADV_MONITOR_EXT_MSFT;
2050
2051 return HCI_ADV_MONITOR_EXT_NONE;
2052}
2053
2054struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2055 bdaddr_t *bdaddr, u8 type)
2056{
2057 struct bdaddr_list *b;
2058
2059 list_for_each_entry(b, bdaddr_list, list) {
2060 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2061 return b;
2062 }
2063
2064 return NULL;
2065}
2066
2067struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2068 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2069 u8 type)
2070{
2071 struct bdaddr_list_with_irk *b;
2072
2073 list_for_each_entry(b, bdaddr_list, list) {
2074 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2075 return b;
2076 }
2077
2078 return NULL;
2079}
2080
2081struct bdaddr_list_with_flags *
2082hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
2083 bdaddr_t *bdaddr, u8 type)
2084{
2085 struct bdaddr_list_with_flags *b;
2086
2087 list_for_each_entry(b, bdaddr_list, list) {
2088 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2089 return b;
2090 }
2091
2092 return NULL;
2093}
2094
2095void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2096{
2097 struct bdaddr_list *b, *n;
2098
2099 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2100 list_del(&b->list);
2101 kfree(b);
2102 }
2103}
2104
2105int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2106{
2107 struct bdaddr_list *entry;
2108
2109 if (!bacmp(bdaddr, BDADDR_ANY))
2110 return -EBADF;
2111
2112 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2113 return -EEXIST;
2114
2115 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2116 if (!entry)
2117 return -ENOMEM;
2118
2119 bacpy(&entry->bdaddr, bdaddr);
2120 entry->bdaddr_type = type;
2121
2122 list_add(&entry->list, list);
2123
2124 return 0;
2125}
2126
2127int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2128 u8 type, u8 *peer_irk, u8 *local_irk)
2129{
2130 struct bdaddr_list_with_irk *entry;
2131
2132 if (!bacmp(bdaddr, BDADDR_ANY))
2133 return -EBADF;
2134
2135 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2136 return -EEXIST;
2137
2138 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2139 if (!entry)
2140 return -ENOMEM;
2141
2142 bacpy(&entry->bdaddr, bdaddr);
2143 entry->bdaddr_type = type;
2144
2145 if (peer_irk)
2146 memcpy(entry->peer_irk, peer_irk, 16);
2147
2148 if (local_irk)
2149 memcpy(entry->local_irk, local_irk, 16);
2150
2151 list_add(&entry->list, list);
2152
2153 return 0;
2154}
2155
2156int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2157 u8 type, u32 flags)
2158{
2159 struct bdaddr_list_with_flags *entry;
2160
2161 if (!bacmp(bdaddr, BDADDR_ANY))
2162 return -EBADF;
2163
2164 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2165 return -EEXIST;
2166
2167 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2168 if (!entry)
2169 return -ENOMEM;
2170
2171 bacpy(&entry->bdaddr, bdaddr);
2172 entry->bdaddr_type = type;
2173 entry->flags = flags;
2174
2175 list_add(&entry->list, list);
2176
2177 return 0;
2178}
2179
2180int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2181{
2182 struct bdaddr_list *entry;
2183
2184 if (!bacmp(bdaddr, BDADDR_ANY)) {
2185 hci_bdaddr_list_clear(list);
2186 return 0;
2187 }
2188
2189 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2190 if (!entry)
2191 return -ENOENT;
2192
2193 list_del(&entry->list);
2194 kfree(entry);
2195
2196 return 0;
2197}
2198
2199int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2200 u8 type)
2201{
2202 struct bdaddr_list_with_irk *entry;
2203
2204 if (!bacmp(bdaddr, BDADDR_ANY)) {
2205 hci_bdaddr_list_clear(list);
2206 return 0;
2207 }
2208
2209 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2210 if (!entry)
2211 return -ENOENT;
2212
2213 list_del(&entry->list);
2214 kfree(entry);
2215
2216 return 0;
2217}
2218
2219int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2220 u8 type)
2221{
2222 struct bdaddr_list_with_flags *entry;
2223
2224 if (!bacmp(bdaddr, BDADDR_ANY)) {
2225 hci_bdaddr_list_clear(list);
2226 return 0;
2227 }
2228
2229 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
2230 if (!entry)
2231 return -ENOENT;
2232
2233 list_del(&entry->list);
2234 kfree(entry);
2235
2236 return 0;
2237}
2238
2239/* This function requires the caller holds hdev->lock */
2240struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2241 bdaddr_t *addr, u8 addr_type)
2242{
2243 struct hci_conn_params *params;
2244
2245 list_for_each_entry(params, &hdev->le_conn_params, list) {
2246 if (bacmp(¶ms->addr, addr) == 0 &&
2247 params->addr_type == addr_type) {
2248 return params;
2249 }
2250 }
2251
2252 return NULL;
2253}
2254
2255/* This function requires the caller holds hdev->lock or rcu_read_lock */
2256struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2257 bdaddr_t *addr, u8 addr_type)
2258{
2259 struct hci_conn_params *param;
2260
2261 rcu_read_lock();
2262
2263 list_for_each_entry_rcu(param, list, action) {
2264 if (bacmp(¶m->addr, addr) == 0 &&
2265 param->addr_type == addr_type) {
2266 rcu_read_unlock();
2267 return param;
2268 }
2269 }
2270
2271 rcu_read_unlock();
2272
2273 return NULL;
2274}
2275
2276/* This function requires the caller holds hdev->lock */
2277void hci_pend_le_list_del_init(struct hci_conn_params *param)
2278{
2279 if (list_empty(¶m->action))
2280 return;
2281
2282 list_del_rcu(¶m->action);
2283 synchronize_rcu();
2284 INIT_LIST_HEAD(¶m->action);
2285}
2286
2287/* This function requires the caller holds hdev->lock */
2288void hci_pend_le_list_add(struct hci_conn_params *param,
2289 struct list_head *list)
2290{
2291 list_add_rcu(¶m->action, list);
2292}
2293
2294/* This function requires the caller holds hdev->lock */
2295struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2296 bdaddr_t *addr, u8 addr_type)
2297{
2298 struct hci_conn_params *params;
2299
2300 params = hci_conn_params_lookup(hdev, addr, addr_type);
2301 if (params)
2302 return params;
2303
2304 params = kzalloc(sizeof(*params), GFP_KERNEL);
2305 if (!params) {
2306 bt_dev_err(hdev, "out of memory");
2307 return NULL;
2308 }
2309
2310 bacpy(¶ms->addr, addr);
2311 params->addr_type = addr_type;
2312
2313 list_add(¶ms->list, &hdev->le_conn_params);
2314 INIT_LIST_HEAD(¶ms->action);
2315
2316 params->conn_min_interval = hdev->le_conn_min_interval;
2317 params->conn_max_interval = hdev->le_conn_max_interval;
2318 params->conn_latency = hdev->le_conn_latency;
2319 params->supervision_timeout = hdev->le_supv_timeout;
2320 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2321
2322 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2323
2324 return params;
2325}
2326
2327void hci_conn_params_free(struct hci_conn_params *params)
2328{
2329 hci_pend_le_list_del_init(params);
2330
2331 if (params->conn) {
2332 hci_conn_drop(params->conn);
2333 hci_conn_put(params->conn);
2334 }
2335
2336 list_del(¶ms->list);
2337 kfree(params);
2338}
2339
2340/* This function requires the caller holds hdev->lock */
2341void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2342{
2343 struct hci_conn_params *params;
2344
2345 params = hci_conn_params_lookup(hdev, addr, addr_type);
2346 if (!params)
2347 return;
2348
2349 hci_conn_params_free(params);
2350
2351 hci_update_passive_scan(hdev);
2352
2353 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2354}
2355
2356/* This function requires the caller holds hdev->lock */
2357void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2358{
2359 struct hci_conn_params *params, *tmp;
2360
2361 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2362 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2363 continue;
2364
2365 /* If trying to establish one time connection to disabled
2366 * device, leave the params, but mark them as just once.
2367 */
2368 if (params->explicit_connect) {
2369 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2370 continue;
2371 }
2372
2373 hci_conn_params_free(params);
2374 }
2375
2376 BT_DBG("All LE disabled connection parameters were removed");
2377}
2378
2379/* This function requires the caller holds hdev->lock */
2380static void hci_conn_params_clear_all(struct hci_dev *hdev)
2381{
2382 struct hci_conn_params *params, *tmp;
2383
2384 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2385 hci_conn_params_free(params);
2386
2387 BT_DBG("All LE connection parameters were removed");
2388}
2389
2390/* Copy the Identity Address of the controller.
2391 *
2392 * If the controller has a public BD_ADDR, then by default use that one.
2393 * If this is a LE only controller without a public address, default to
2394 * the static random address.
2395 *
2396 * For debugging purposes it is possible to force controllers with a
2397 * public address to use the static random address instead.
2398 *
2399 * In case BR/EDR has been disabled on a dual-mode controller and
2400 * userspace has configured a static address, then that address
2401 * becomes the identity address instead of the public BR/EDR address.
2402 */
2403void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2404 u8 *bdaddr_type)
2405{
2406 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2407 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2408 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2409 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2410 bacpy(bdaddr, &hdev->static_addr);
2411 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2412 } else {
2413 bacpy(bdaddr, &hdev->bdaddr);
2414 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2415 }
2416}
2417
2418static void hci_clear_wake_reason(struct hci_dev *hdev)
2419{
2420 hci_dev_lock(hdev);
2421
2422 hdev->wake_reason = 0;
2423 bacpy(&hdev->wake_addr, BDADDR_ANY);
2424 hdev->wake_addr_type = 0;
2425
2426 hci_dev_unlock(hdev);
2427}
2428
2429static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
2430 void *data)
2431{
2432 struct hci_dev *hdev =
2433 container_of(nb, struct hci_dev, suspend_notifier);
2434 int ret = 0;
2435
2436 /* Userspace has full control of this device. Do nothing. */
2437 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2438 return NOTIFY_DONE;
2439
2440 /* To avoid a potential race with hci_unregister_dev. */
2441 hci_dev_hold(hdev);
2442
2443 if (action == PM_SUSPEND_PREPARE)
2444 ret = hci_suspend_dev(hdev);
2445 else if (action == PM_POST_SUSPEND)
2446 ret = hci_resume_dev(hdev);
2447
2448 if (ret)
2449 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
2450 action, ret);
2451
2452 hci_dev_put(hdev);
2453 return NOTIFY_DONE;
2454}
2455
2456/* Alloc HCI device */
2457struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
2458{
2459 struct hci_dev *hdev;
2460 unsigned int alloc_size;
2461
2462 alloc_size = sizeof(*hdev);
2463 if (sizeof_priv) {
2464 /* Fixme: May need ALIGN-ment? */
2465 alloc_size += sizeof_priv;
2466 }
2467
2468 hdev = kzalloc(alloc_size, GFP_KERNEL);
2469 if (!hdev)
2470 return NULL;
2471
2472 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2473 hdev->esco_type = (ESCO_HV1);
2474 hdev->link_mode = (HCI_LM_ACCEPT);
2475 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2476 hdev->io_capability = 0x03; /* No Input No Output */
2477 hdev->manufacturer = 0xffff; /* Default to internal use */
2478 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2479 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2480 hdev->adv_instance_cnt = 0;
2481 hdev->cur_adv_instance = 0x00;
2482 hdev->adv_instance_timeout = 0;
2483
2484 hdev->advmon_allowlist_duration = 300;
2485 hdev->advmon_no_filter_duration = 500;
2486 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
2487
2488 hdev->sniff_max_interval = 800;
2489 hdev->sniff_min_interval = 80;
2490
2491 hdev->le_adv_channel_map = 0x07;
2492 hdev->le_adv_min_interval = 0x0800;
2493 hdev->le_adv_max_interval = 0x0800;
2494 hdev->le_scan_interval = 0x0060;
2495 hdev->le_scan_window = 0x0030;
2496 hdev->le_scan_int_suspend = 0x0400;
2497 hdev->le_scan_window_suspend = 0x0012;
2498 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
2499 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
2500 hdev->le_scan_int_adv_monitor = 0x0060;
2501 hdev->le_scan_window_adv_monitor = 0x0030;
2502 hdev->le_scan_int_connect = 0x0060;
2503 hdev->le_scan_window_connect = 0x0060;
2504 hdev->le_conn_min_interval = 0x0018;
2505 hdev->le_conn_max_interval = 0x0028;
2506 hdev->le_conn_latency = 0x0000;
2507 hdev->le_supv_timeout = 0x002a;
2508 hdev->le_def_tx_len = 0x001b;
2509 hdev->le_def_tx_time = 0x0148;
2510 hdev->le_max_tx_len = 0x001b;
2511 hdev->le_max_tx_time = 0x0148;
2512 hdev->le_max_rx_len = 0x001b;
2513 hdev->le_max_rx_time = 0x0148;
2514 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
2515 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
2516 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
2517 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
2518 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
2519 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
2520 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
2521 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
2522 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
2523
2524 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2525 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2526 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2527 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2528 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
2529 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
2530
2531 /* default 1.28 sec page scan */
2532 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
2533 hdev->def_page_scan_int = 0x0800;
2534 hdev->def_page_scan_window = 0x0012;
2535
2536 mutex_init(&hdev->lock);
2537 mutex_init(&hdev->req_lock);
2538
2539 ida_init(&hdev->unset_handle_ida);
2540
2541 INIT_LIST_HEAD(&hdev->mesh_pending);
2542 INIT_LIST_HEAD(&hdev->mgmt_pending);
2543 INIT_LIST_HEAD(&hdev->reject_list);
2544 INIT_LIST_HEAD(&hdev->accept_list);
2545 INIT_LIST_HEAD(&hdev->uuids);
2546 INIT_LIST_HEAD(&hdev->link_keys);
2547 INIT_LIST_HEAD(&hdev->long_term_keys);
2548 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2549 INIT_LIST_HEAD(&hdev->remote_oob_data);
2550 INIT_LIST_HEAD(&hdev->le_accept_list);
2551 INIT_LIST_HEAD(&hdev->le_resolv_list);
2552 INIT_LIST_HEAD(&hdev->le_conn_params);
2553 INIT_LIST_HEAD(&hdev->pend_le_conns);
2554 INIT_LIST_HEAD(&hdev->pend_le_reports);
2555 INIT_LIST_HEAD(&hdev->conn_hash.list);
2556 INIT_LIST_HEAD(&hdev->adv_instances);
2557 INIT_LIST_HEAD(&hdev->blocked_keys);
2558 INIT_LIST_HEAD(&hdev->monitored_devices);
2559
2560 INIT_LIST_HEAD(&hdev->local_codecs);
2561 INIT_WORK(&hdev->rx_work, hci_rx_work);
2562 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2563 INIT_WORK(&hdev->tx_work, hci_tx_work);
2564 INIT_WORK(&hdev->power_on, hci_power_on);
2565 INIT_WORK(&hdev->error_reset, hci_error_reset);
2566
2567 hci_cmd_sync_init(hdev);
2568
2569 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2570
2571 skb_queue_head_init(&hdev->rx_q);
2572 skb_queue_head_init(&hdev->cmd_q);
2573 skb_queue_head_init(&hdev->raw_q);
2574
2575 init_waitqueue_head(&hdev->req_wait_q);
2576
2577 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
2578 INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
2579
2580 hci_devcd_setup(hdev);
2581 hci_request_setup(hdev);
2582
2583 hci_init_sysfs(hdev);
2584 discovery_init(hdev);
2585
2586 return hdev;
2587}
2588EXPORT_SYMBOL(hci_alloc_dev_priv);
2589
2590/* Free HCI device */
2591void hci_free_dev(struct hci_dev *hdev)
2592{
2593 /* will free via device release */
2594 put_device(&hdev->dev);
2595}
2596EXPORT_SYMBOL(hci_free_dev);
2597
2598/* Register HCI device */
2599int hci_register_dev(struct hci_dev *hdev)
2600{
2601 int id, error;
2602
2603 if (!hdev->open || !hdev->close || !hdev->send)
2604 return -EINVAL;
2605
2606 /* Do not allow HCI_AMP devices to register at index 0,
2607 * so the index can be used as the AMP controller ID.
2608 */
2609 switch (hdev->dev_type) {
2610 case HCI_PRIMARY:
2611 id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL);
2612 break;
2613 case HCI_AMP:
2614 id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL);
2615 break;
2616 default:
2617 return -EINVAL;
2618 }
2619
2620 if (id < 0)
2621 return id;
2622
2623 error = dev_set_name(&hdev->dev, "hci%u", id);
2624 if (error)
2625 return error;
2626
2627 hdev->name = dev_name(&hdev->dev);
2628 hdev->id = id;
2629
2630 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2631
2632 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
2633 if (!hdev->workqueue) {
2634 error = -ENOMEM;
2635 goto err;
2636 }
2637
2638 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
2639 hdev->name);
2640 if (!hdev->req_workqueue) {
2641 destroy_workqueue(hdev->workqueue);
2642 error = -ENOMEM;
2643 goto err;
2644 }
2645
2646 if (!IS_ERR_OR_NULL(bt_debugfs))
2647 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
2648
2649 error = device_add(&hdev->dev);
2650 if (error < 0)
2651 goto err_wqueue;
2652
2653 hci_leds_init(hdev);
2654
2655 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2656 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2657 hdev);
2658 if (hdev->rfkill) {
2659 if (rfkill_register(hdev->rfkill) < 0) {
2660 rfkill_destroy(hdev->rfkill);
2661 hdev->rfkill = NULL;
2662 }
2663 }
2664
2665 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2666 hci_dev_set_flag(hdev, HCI_RFKILLED);
2667
2668 hci_dev_set_flag(hdev, HCI_SETUP);
2669 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
2670
2671 if (hdev->dev_type == HCI_PRIMARY) {
2672 /* Assume BR/EDR support until proven otherwise (such as
2673 * through reading supported features during init.
2674 */
2675 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
2676 }
2677
2678 write_lock(&hci_dev_list_lock);
2679 list_add(&hdev->list, &hci_dev_list);
2680 write_unlock(&hci_dev_list_lock);
2681
2682 /* Devices that are marked for raw-only usage are unconfigured
2683 * and should not be included in normal operation.
2684 */
2685 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2686 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
2687
2688 /* Mark Remote Wakeup connection flag as supported if driver has wakeup
2689 * callback.
2690 */
2691 if (hdev->wakeup)
2692 hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
2693
2694 hci_sock_dev_event(hdev, HCI_DEV_REG);
2695 hci_dev_hold(hdev);
2696
2697 error = hci_register_suspend_notifier(hdev);
2698 if (error)
2699 BT_WARN("register suspend notifier failed error:%d\n", error);
2700
2701 queue_work(hdev->req_workqueue, &hdev->power_on);
2702
2703 idr_init(&hdev->adv_monitors_idr);
2704 msft_register(hdev);
2705
2706 return id;
2707
2708err_wqueue:
2709 debugfs_remove_recursive(hdev->debugfs);
2710 destroy_workqueue(hdev->workqueue);
2711 destroy_workqueue(hdev->req_workqueue);
2712err:
2713 ida_simple_remove(&hci_index_ida, hdev->id);
2714
2715 return error;
2716}
2717EXPORT_SYMBOL(hci_register_dev);
2718
2719/* Unregister HCI device */
2720void hci_unregister_dev(struct hci_dev *hdev)
2721{
2722 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2723
2724 mutex_lock(&hdev->unregister_lock);
2725 hci_dev_set_flag(hdev, HCI_UNREGISTER);
2726 mutex_unlock(&hdev->unregister_lock);
2727
2728 write_lock(&hci_dev_list_lock);
2729 list_del(&hdev->list);
2730 write_unlock(&hci_dev_list_lock);
2731
2732 cancel_work_sync(&hdev->power_on);
2733
2734 hci_cmd_sync_clear(hdev);
2735
2736 hci_unregister_suspend_notifier(hdev);
2737
2738 msft_unregister(hdev);
2739
2740 hci_dev_do_close(hdev);
2741
2742 if (!test_bit(HCI_INIT, &hdev->flags) &&
2743 !hci_dev_test_flag(hdev, HCI_SETUP) &&
2744 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
2745 hci_dev_lock(hdev);
2746 mgmt_index_removed(hdev);
2747 hci_dev_unlock(hdev);
2748 }
2749
2750 /* mgmt_index_removed should take care of emptying the
2751 * pending list */
2752 BUG_ON(!list_empty(&hdev->mgmt_pending));
2753
2754 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
2755
2756 if (hdev->rfkill) {
2757 rfkill_unregister(hdev->rfkill);
2758 rfkill_destroy(hdev->rfkill);
2759 }
2760
2761 device_del(&hdev->dev);
2762 /* Actual cleanup is deferred until hci_release_dev(). */
2763 hci_dev_put(hdev);
2764}
2765EXPORT_SYMBOL(hci_unregister_dev);
2766
2767/* Release HCI device */
2768void hci_release_dev(struct hci_dev *hdev)
2769{
2770 debugfs_remove_recursive(hdev->debugfs);
2771 kfree_const(hdev->hw_info);
2772 kfree_const(hdev->fw_info);
2773
2774 destroy_workqueue(hdev->workqueue);
2775 destroy_workqueue(hdev->req_workqueue);
2776
2777 hci_dev_lock(hdev);
2778 hci_bdaddr_list_clear(&hdev->reject_list);
2779 hci_bdaddr_list_clear(&hdev->accept_list);
2780 hci_uuids_clear(hdev);
2781 hci_link_keys_clear(hdev);
2782 hci_smp_ltks_clear(hdev);
2783 hci_smp_irks_clear(hdev);
2784 hci_remote_oob_data_clear(hdev);
2785 hci_adv_instances_clear(hdev);
2786 hci_adv_monitors_clear(hdev);
2787 hci_bdaddr_list_clear(&hdev->le_accept_list);
2788 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2789 hci_conn_params_clear_all(hdev);
2790 hci_discovery_filter_clear(hdev);
2791 hci_blocked_keys_clear(hdev);
2792 hci_codec_list_clear(&hdev->local_codecs);
2793 hci_dev_unlock(hdev);
2794
2795 ida_destroy(&hdev->unset_handle_ida);
2796 ida_simple_remove(&hci_index_ida, hdev->id);
2797 kfree_skb(hdev->sent_cmd);
2798 kfree_skb(hdev->recv_event);
2799 kfree(hdev);
2800}
2801EXPORT_SYMBOL(hci_release_dev);
2802
2803int hci_register_suspend_notifier(struct hci_dev *hdev)
2804{
2805 int ret = 0;
2806
2807 if (!hdev->suspend_notifier.notifier_call &&
2808 !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
2809 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
2810 ret = register_pm_notifier(&hdev->suspend_notifier);
2811 }
2812
2813 return ret;
2814}
2815
2816int hci_unregister_suspend_notifier(struct hci_dev *hdev)
2817{
2818 int ret = 0;
2819
2820 if (hdev->suspend_notifier.notifier_call) {
2821 ret = unregister_pm_notifier(&hdev->suspend_notifier);
2822 if (!ret)
2823 hdev->suspend_notifier.notifier_call = NULL;
2824 }
2825
2826 return ret;
2827}
2828
2829/* Suspend HCI device */
2830int hci_suspend_dev(struct hci_dev *hdev)
2831{
2832 int ret;
2833
2834 bt_dev_dbg(hdev, "");
2835
2836 /* Suspend should only act on when powered. */
2837 if (!hdev_is_powered(hdev) ||
2838 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2839 return 0;
2840
2841 /* If powering down don't attempt to suspend */
2842 if (mgmt_powering_down(hdev))
2843 return 0;
2844
2845 /* Cancel potentially blocking sync operation before suspend */
2846 __hci_cmd_sync_cancel(hdev, -EHOSTDOWN);
2847
2848 hci_req_sync_lock(hdev);
2849 ret = hci_suspend_sync(hdev);
2850 hci_req_sync_unlock(hdev);
2851
2852 hci_clear_wake_reason(hdev);
2853 mgmt_suspending(hdev, hdev->suspend_state);
2854
2855 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
2856 return ret;
2857}
2858EXPORT_SYMBOL(hci_suspend_dev);
2859
2860/* Resume HCI device */
2861int hci_resume_dev(struct hci_dev *hdev)
2862{
2863 int ret;
2864
2865 bt_dev_dbg(hdev, "");
2866
2867 /* Resume should only act on when powered. */
2868 if (!hdev_is_powered(hdev) ||
2869 hci_dev_test_flag(hdev, HCI_UNREGISTER))
2870 return 0;
2871
2872 /* If powering down don't attempt to resume */
2873 if (mgmt_powering_down(hdev))
2874 return 0;
2875
2876 hci_req_sync_lock(hdev);
2877 ret = hci_resume_sync(hdev);
2878 hci_req_sync_unlock(hdev);
2879
2880 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
2881 hdev->wake_addr_type);
2882
2883 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
2884 return ret;
2885}
2886EXPORT_SYMBOL(hci_resume_dev);
2887
2888/* Reset HCI device */
2889int hci_reset_dev(struct hci_dev *hdev)
2890{
2891 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
2892 struct sk_buff *skb;
2893
2894 skb = bt_skb_alloc(3, GFP_ATOMIC);
2895 if (!skb)
2896 return -ENOMEM;
2897
2898 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2899 skb_put_data(skb, hw_err, 3);
2900
2901 bt_dev_err(hdev, "Injecting HCI hardware error event");
2902
2903 /* Send Hardware Error to upper stack */
2904 return hci_recv_frame(hdev, skb);
2905}
2906EXPORT_SYMBOL(hci_reset_dev);
2907
2908/* Receive frame from HCI drivers */
2909int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
2910{
2911 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2912 && !test_bit(HCI_INIT, &hdev->flags))) {
2913 kfree_skb(skb);
2914 return -ENXIO;
2915 }
2916
2917 switch (hci_skb_pkt_type(skb)) {
2918 case HCI_EVENT_PKT:
2919 break;
2920 case HCI_ACLDATA_PKT:
2921 /* Detect if ISO packet has been sent as ACL */
2922 if (hci_conn_num(hdev, ISO_LINK)) {
2923 __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
2924 __u8 type;
2925
2926 type = hci_conn_lookup_type(hdev, hci_handle(handle));
2927 if (type == ISO_LINK)
2928 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
2929 }
2930 break;
2931 case HCI_SCODATA_PKT:
2932 break;
2933 case HCI_ISODATA_PKT:
2934 break;
2935 default:
2936 kfree_skb(skb);
2937 return -EINVAL;
2938 }
2939
2940 /* Incoming skb */
2941 bt_cb(skb)->incoming = 1;
2942
2943 /* Time stamp */
2944 __net_timestamp(skb);
2945
2946 skb_queue_tail(&hdev->rx_q, skb);
2947 queue_work(hdev->workqueue, &hdev->rx_work);
2948
2949 return 0;
2950}
2951EXPORT_SYMBOL(hci_recv_frame);
2952
2953/* Receive diagnostic message from HCI drivers */
2954int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
2955{
2956 /* Mark as diagnostic packet */
2957 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
2958
2959 /* Time stamp */
2960 __net_timestamp(skb);
2961
2962 skb_queue_tail(&hdev->rx_q, skb);
2963 queue_work(hdev->workqueue, &hdev->rx_work);
2964
2965 return 0;
2966}
2967EXPORT_SYMBOL(hci_recv_diag);
2968
2969void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
2970{
2971 va_list vargs;
2972
2973 va_start(vargs, fmt);
2974 kfree_const(hdev->hw_info);
2975 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2976 va_end(vargs);
2977}
2978EXPORT_SYMBOL(hci_set_hw_info);
2979
2980void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
2981{
2982 va_list vargs;
2983
2984 va_start(vargs, fmt);
2985 kfree_const(hdev->fw_info);
2986 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2987 va_end(vargs);
2988}
2989EXPORT_SYMBOL(hci_set_fw_info);
2990
2991/* ---- Interface to upper protocols ---- */
2992
2993int hci_register_cb(struct hci_cb *cb)
2994{
2995 BT_DBG("%p name %s", cb, cb->name);
2996
2997 mutex_lock(&hci_cb_list_lock);
2998 list_add_tail(&cb->list, &hci_cb_list);
2999 mutex_unlock(&hci_cb_list_lock);
3000
3001 return 0;
3002}
3003EXPORT_SYMBOL(hci_register_cb);
3004
3005int hci_unregister_cb(struct hci_cb *cb)
3006{
3007 BT_DBG("%p name %s", cb, cb->name);
3008
3009 mutex_lock(&hci_cb_list_lock);
3010 list_del(&cb->list);
3011 mutex_unlock(&hci_cb_list_lock);
3012
3013 return 0;
3014}
3015EXPORT_SYMBOL(hci_unregister_cb);
3016
3017static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3018{
3019 int err;
3020
3021 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3022 skb->len);
3023
3024 /* Time stamp */
3025 __net_timestamp(skb);
3026
3027 /* Send copy to monitor */
3028 hci_send_to_monitor(hdev, skb);
3029
3030 if (atomic_read(&hdev->promisc)) {
3031 /* Send copy to the sockets */
3032 hci_send_to_sock(hdev, skb);
3033 }
3034
3035 /* Get rid of skb owner, prior to sending to the driver. */
3036 skb_orphan(skb);
3037
3038 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3039 kfree_skb(skb);
3040 return -EINVAL;
3041 }
3042
3043 err = hdev->send(hdev, skb);
3044 if (err < 0) {
3045 bt_dev_err(hdev, "sending frame failed (%d)", err);
3046 kfree_skb(skb);
3047 return err;
3048 }
3049
3050 return 0;
3051}
3052
3053/* Send HCI command */
3054int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3055 const void *param)
3056{
3057 struct sk_buff *skb;
3058
3059 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3060
3061 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3062 if (!skb) {
3063 bt_dev_err(hdev, "no memory for command");
3064 return -ENOMEM;
3065 }
3066
3067 /* Stand-alone HCI commands must be flagged as
3068 * single-command requests.
3069 */
3070 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3071
3072 skb_queue_tail(&hdev->cmd_q, skb);
3073 queue_work(hdev->workqueue, &hdev->cmd_work);
3074
3075 return 0;
3076}
3077
3078int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3079 const void *param)
3080{
3081 struct sk_buff *skb;
3082
3083 if (hci_opcode_ogf(opcode) != 0x3f) {
3084 /* A controller receiving a command shall respond with either
3085 * a Command Status Event or a Command Complete Event.
3086 * Therefore, all standard HCI commands must be sent via the
3087 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3088 * Some vendors do not comply with this rule for vendor-specific
3089 * commands and do not return any event. We want to support
3090 * unresponded commands for such cases only.
3091 */
3092 bt_dev_err(hdev, "unresponded command not supported");
3093 return -EINVAL;
3094 }
3095
3096 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3097 if (!skb) {
3098 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3099 opcode);
3100 return -ENOMEM;
3101 }
3102
3103 hci_send_frame(hdev, skb);
3104
3105 return 0;
3106}
3107EXPORT_SYMBOL(__hci_cmd_send);
3108
3109/* Get data from the previously sent command */
3110void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3111{
3112 struct hci_command_hdr *hdr;
3113
3114 if (!hdev->sent_cmd)
3115 return NULL;
3116
3117 hdr = (void *) hdev->sent_cmd->data;
3118
3119 if (hdr->opcode != cpu_to_le16(opcode))
3120 return NULL;
3121
3122 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3123
3124 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3125}
3126
3127/* Get data from last received event */
3128void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
3129{
3130 struct hci_event_hdr *hdr;
3131 int offset;
3132
3133 if (!hdev->recv_event)
3134 return NULL;
3135
3136 hdr = (void *)hdev->recv_event->data;
3137 offset = sizeof(*hdr);
3138
3139 if (hdr->evt != event) {
3140 /* In case of LE metaevent check the subevent match */
3141 if (hdr->evt == HCI_EV_LE_META) {
3142 struct hci_ev_le_meta *ev;
3143
3144 ev = (void *)hdev->recv_event->data + offset;
3145 offset += sizeof(*ev);
3146 if (ev->subevent == event)
3147 goto found;
3148 }
3149 return NULL;
3150 }
3151
3152found:
3153 bt_dev_dbg(hdev, "event 0x%2.2x", event);
3154
3155 return hdev->recv_event->data + offset;
3156}
3157
3158/* Send ACL data */
3159static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3160{
3161 struct hci_acl_hdr *hdr;
3162 int len = skb->len;
3163
3164 skb_push(skb, HCI_ACL_HDR_SIZE);
3165 skb_reset_transport_header(skb);
3166 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3167 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3168 hdr->dlen = cpu_to_le16(len);
3169}
3170
3171static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3172 struct sk_buff *skb, __u16 flags)
3173{
3174 struct hci_conn *conn = chan->conn;
3175 struct hci_dev *hdev = conn->hdev;
3176 struct sk_buff *list;
3177
3178 skb->len = skb_headlen(skb);
3179 skb->data_len = 0;
3180
3181 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3182
3183 switch (hdev->dev_type) {
3184 case HCI_PRIMARY:
3185 hci_add_acl_hdr(skb, conn->handle, flags);
3186 break;
3187 case HCI_AMP:
3188 hci_add_acl_hdr(skb, chan->handle, flags);
3189 break;
3190 default:
3191 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3192 return;
3193 }
3194
3195 list = skb_shinfo(skb)->frag_list;
3196 if (!list) {
3197 /* Non fragmented */
3198 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3199
3200 skb_queue_tail(queue, skb);
3201 } else {
3202 /* Fragmented */
3203 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3204
3205 skb_shinfo(skb)->frag_list = NULL;
3206
3207 /* Queue all fragments atomically. We need to use spin_lock_bh
3208 * here because of 6LoWPAN links, as there this function is
3209 * called from softirq and using normal spin lock could cause
3210 * deadlocks.
3211 */
3212 spin_lock_bh(&queue->lock);
3213
3214 __skb_queue_tail(queue, skb);
3215
3216 flags &= ~ACL_START;
3217 flags |= ACL_CONT;
3218 do {
3219 skb = list; list = list->next;
3220
3221 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3222 hci_add_acl_hdr(skb, conn->handle, flags);
3223
3224 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3225
3226 __skb_queue_tail(queue, skb);
3227 } while (list);
3228
3229 spin_unlock_bh(&queue->lock);
3230 }
3231}
3232
3233void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3234{
3235 struct hci_dev *hdev = chan->conn->hdev;
3236
3237 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3238
3239 hci_queue_acl(chan, &chan->data_q, skb, flags);
3240
3241 queue_work(hdev->workqueue, &hdev->tx_work);
3242}
3243
3244/* Send SCO data */
3245void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3246{
3247 struct hci_dev *hdev = conn->hdev;
3248 struct hci_sco_hdr hdr;
3249
3250 BT_DBG("%s len %d", hdev->name, skb->len);
3251
3252 hdr.handle = cpu_to_le16(conn->handle);
3253 hdr.dlen = skb->len;
3254
3255 skb_push(skb, HCI_SCO_HDR_SIZE);
3256 skb_reset_transport_header(skb);
3257 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3258
3259 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3260
3261 skb_queue_tail(&conn->data_q, skb);
3262 queue_work(hdev->workqueue, &hdev->tx_work);
3263}
3264
3265/* Send ISO data */
3266static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
3267{
3268 struct hci_iso_hdr *hdr;
3269 int len = skb->len;
3270
3271 skb_push(skb, HCI_ISO_HDR_SIZE);
3272 skb_reset_transport_header(skb);
3273 hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
3274 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3275 hdr->dlen = cpu_to_le16(len);
3276}
3277
3278static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
3279 struct sk_buff *skb)
3280{
3281 struct hci_dev *hdev = conn->hdev;
3282 struct sk_buff *list;
3283 __u16 flags;
3284
3285 skb->len = skb_headlen(skb);
3286 skb->data_len = 0;
3287
3288 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3289
3290 list = skb_shinfo(skb)->frag_list;
3291
3292 flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
3293 hci_add_iso_hdr(skb, conn->handle, flags);
3294
3295 if (!list) {
3296 /* Non fragmented */
3297 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3298
3299 skb_queue_tail(queue, skb);
3300 } else {
3301 /* Fragmented */
3302 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3303
3304 skb_shinfo(skb)->frag_list = NULL;
3305
3306 __skb_queue_tail(queue, skb);
3307
3308 do {
3309 skb = list; list = list->next;
3310
3311 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3312 flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
3313 0x00);
3314 hci_add_iso_hdr(skb, conn->handle, flags);
3315
3316 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3317
3318 __skb_queue_tail(queue, skb);
3319 } while (list);
3320 }
3321}
3322
3323void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
3324{
3325 struct hci_dev *hdev = conn->hdev;
3326
3327 BT_DBG("%s len %d", hdev->name, skb->len);
3328
3329 hci_queue_iso(conn, &conn->data_q, skb);
3330
3331 queue_work(hdev->workqueue, &hdev->tx_work);
3332}
3333
3334/* ---- HCI TX task (outgoing data) ---- */
3335
3336/* HCI Connection scheduler */
3337static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
3338{
3339 struct hci_dev *hdev;
3340 int cnt, q;
3341
3342 if (!conn) {
3343 *quote = 0;
3344 return;
3345 }
3346
3347 hdev = conn->hdev;
3348
3349 switch (conn->type) {
3350 case ACL_LINK:
3351 cnt = hdev->acl_cnt;
3352 break;
3353 case AMP_LINK:
3354 cnt = hdev->block_cnt;
3355 break;
3356 case SCO_LINK:
3357 case ESCO_LINK:
3358 cnt = hdev->sco_cnt;
3359 break;
3360 case LE_LINK:
3361 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3362 break;
3363 case ISO_LINK:
3364 cnt = hdev->iso_mtu ? hdev->iso_cnt :
3365 hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3366 break;
3367 default:
3368 cnt = 0;
3369 bt_dev_err(hdev, "unknown link type %d", conn->type);
3370 }
3371
3372 q = cnt / num;
3373 *quote = q ? q : 1;
3374}
3375
3376static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3377 int *quote)
3378{
3379 struct hci_conn_hash *h = &hdev->conn_hash;
3380 struct hci_conn *conn = NULL, *c;
3381 unsigned int num = 0, min = ~0;
3382
3383 /* We don't have to lock device here. Connections are always
3384 * added and removed with TX task disabled. */
3385
3386 rcu_read_lock();
3387
3388 list_for_each_entry_rcu(c, &h->list, list) {
3389 if (c->type != type || skb_queue_empty(&c->data_q))
3390 continue;
3391
3392 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3393 continue;
3394
3395 num++;
3396
3397 if (c->sent < min) {
3398 min = c->sent;
3399 conn = c;
3400 }
3401
3402 if (hci_conn_num(hdev, type) == num)
3403 break;
3404 }
3405
3406 rcu_read_unlock();
3407
3408 hci_quote_sent(conn, num, quote);
3409
3410 BT_DBG("conn %p quote %d", conn, *quote);
3411 return conn;
3412}
3413
3414static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3415{
3416 struct hci_conn_hash *h = &hdev->conn_hash;
3417 struct hci_conn *c;
3418
3419 bt_dev_err(hdev, "link tx timeout");
3420
3421 rcu_read_lock();
3422
3423 /* Kill stalled connections */
3424 list_for_each_entry_rcu(c, &h->list, list) {
3425 if (c->type == type && c->sent) {
3426 bt_dev_err(hdev, "killing stalled connection %pMR",
3427 &c->dst);
3428 /* hci_disconnect might sleep, so, we have to release
3429 * the RCU read lock before calling it.
3430 */
3431 rcu_read_unlock();
3432 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3433 rcu_read_lock();
3434 }
3435 }
3436
3437 rcu_read_unlock();
3438}
3439
3440static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3441 int *quote)
3442{
3443 struct hci_conn_hash *h = &hdev->conn_hash;
3444 struct hci_chan *chan = NULL;
3445 unsigned int num = 0, min = ~0, cur_prio = 0;
3446 struct hci_conn *conn;
3447 int conn_num = 0;
3448
3449 BT_DBG("%s", hdev->name);
3450
3451 rcu_read_lock();
3452
3453 list_for_each_entry_rcu(conn, &h->list, list) {
3454 struct hci_chan *tmp;
3455
3456 if (conn->type != type)
3457 continue;
3458
3459 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3460 continue;
3461
3462 conn_num++;
3463
3464 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3465 struct sk_buff *skb;
3466
3467 if (skb_queue_empty(&tmp->data_q))
3468 continue;
3469
3470 skb = skb_peek(&tmp->data_q);
3471 if (skb->priority < cur_prio)
3472 continue;
3473
3474 if (skb->priority > cur_prio) {
3475 num = 0;
3476 min = ~0;
3477 cur_prio = skb->priority;
3478 }
3479
3480 num++;
3481
3482 if (conn->sent < min) {
3483 min = conn->sent;
3484 chan = tmp;
3485 }
3486 }
3487
3488 if (hci_conn_num(hdev, type) == conn_num)
3489 break;
3490 }
3491
3492 rcu_read_unlock();
3493
3494 if (!chan)
3495 return NULL;
3496
3497 hci_quote_sent(chan->conn, num, quote);
3498
3499 BT_DBG("chan %p quote %d", chan, *quote);
3500 return chan;
3501}
3502
3503static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3504{
3505 struct hci_conn_hash *h = &hdev->conn_hash;
3506 struct hci_conn *conn;
3507 int num = 0;
3508
3509 BT_DBG("%s", hdev->name);
3510
3511 rcu_read_lock();
3512
3513 list_for_each_entry_rcu(conn, &h->list, list) {
3514 struct hci_chan *chan;
3515
3516 if (conn->type != type)
3517 continue;
3518
3519 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3520 continue;
3521
3522 num++;
3523
3524 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3525 struct sk_buff *skb;
3526
3527 if (chan->sent) {
3528 chan->sent = 0;
3529 continue;
3530 }
3531
3532 if (skb_queue_empty(&chan->data_q))
3533 continue;
3534
3535 skb = skb_peek(&chan->data_q);
3536 if (skb->priority >= HCI_PRIO_MAX - 1)
3537 continue;
3538
3539 skb->priority = HCI_PRIO_MAX - 1;
3540
3541 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3542 skb->priority);
3543 }
3544
3545 if (hci_conn_num(hdev, type) == num)
3546 break;
3547 }
3548
3549 rcu_read_unlock();
3550
3551}
3552
3553static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3554{
3555 /* Calculate count of blocks used by this packet */
3556 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3557}
3558
3559static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
3560{
3561 unsigned long last_tx;
3562
3563 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3564 return;
3565
3566 switch (type) {
3567 case LE_LINK:
3568 last_tx = hdev->le_last_tx;
3569 break;
3570 default:
3571 last_tx = hdev->acl_last_tx;
3572 break;
3573 }
3574
3575 /* tx timeout must be longer than maximum link supervision timeout
3576 * (40.9 seconds)
3577 */
3578 if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
3579 hci_link_tx_to(hdev, type);
3580}
3581
3582/* Schedule SCO */
3583static void hci_sched_sco(struct hci_dev *hdev)
3584{
3585 struct hci_conn *conn;
3586 struct sk_buff *skb;
3587 int quote;
3588
3589 BT_DBG("%s", hdev->name);
3590
3591 if (!hci_conn_num(hdev, SCO_LINK))
3592 return;
3593
3594 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3595 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3596 BT_DBG("skb %p len %d", skb, skb->len);
3597 hci_send_frame(hdev, skb);
3598
3599 conn->sent++;
3600 if (conn->sent == ~0)
3601 conn->sent = 0;
3602 }
3603 }
3604}
3605
3606static void hci_sched_esco(struct hci_dev *hdev)
3607{
3608 struct hci_conn *conn;
3609 struct sk_buff *skb;
3610 int quote;
3611
3612 BT_DBG("%s", hdev->name);
3613
3614 if (!hci_conn_num(hdev, ESCO_LINK))
3615 return;
3616
3617 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3618 "e))) {
3619 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3620 BT_DBG("skb %p len %d", skb, skb->len);
3621 hci_send_frame(hdev, skb);
3622
3623 conn->sent++;
3624 if (conn->sent == ~0)
3625 conn->sent = 0;
3626 }
3627 }
3628}
3629
3630static void hci_sched_acl_pkt(struct hci_dev *hdev)
3631{
3632 unsigned int cnt = hdev->acl_cnt;
3633 struct hci_chan *chan;
3634 struct sk_buff *skb;
3635 int quote;
3636
3637 __check_timeout(hdev, cnt, ACL_LINK);
3638
3639 while (hdev->acl_cnt &&
3640 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3641 u32 priority = (skb_peek(&chan->data_q))->priority;
3642 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3643 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3644 skb->len, skb->priority);
3645
3646 /* Stop if priority has changed */
3647 if (skb->priority < priority)
3648 break;
3649
3650 skb = skb_dequeue(&chan->data_q);
3651
3652 hci_conn_enter_active_mode(chan->conn,
3653 bt_cb(skb)->force_active);
3654
3655 hci_send_frame(hdev, skb);
3656 hdev->acl_last_tx = jiffies;
3657
3658 hdev->acl_cnt--;
3659 chan->sent++;
3660 chan->conn->sent++;
3661
3662 /* Send pending SCO packets right away */
3663 hci_sched_sco(hdev);
3664 hci_sched_esco(hdev);
3665 }
3666 }
3667
3668 if (cnt != hdev->acl_cnt)
3669 hci_prio_recalculate(hdev, ACL_LINK);
3670}
3671
3672static void hci_sched_acl_blk(struct hci_dev *hdev)
3673{
3674 unsigned int cnt = hdev->block_cnt;
3675 struct hci_chan *chan;
3676 struct sk_buff *skb;
3677 int quote;
3678 u8 type;
3679
3680 BT_DBG("%s", hdev->name);
3681
3682 if (hdev->dev_type == HCI_AMP)
3683 type = AMP_LINK;
3684 else
3685 type = ACL_LINK;
3686
3687 __check_timeout(hdev, cnt, type);
3688
3689 while (hdev->block_cnt > 0 &&
3690 (chan = hci_chan_sent(hdev, type, "e))) {
3691 u32 priority = (skb_peek(&chan->data_q))->priority;
3692 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3693 int blocks;
3694
3695 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3696 skb->len, skb->priority);
3697
3698 /* Stop if priority has changed */
3699 if (skb->priority < priority)
3700 break;
3701
3702 skb = skb_dequeue(&chan->data_q);
3703
3704 blocks = __get_blocks(hdev, skb);
3705 if (blocks > hdev->block_cnt)
3706 return;
3707
3708 hci_conn_enter_active_mode(chan->conn,
3709 bt_cb(skb)->force_active);
3710
3711 hci_send_frame(hdev, skb);
3712 hdev->acl_last_tx = jiffies;
3713
3714 hdev->block_cnt -= blocks;
3715 quote -= blocks;
3716
3717 chan->sent += blocks;
3718 chan->conn->sent += blocks;
3719 }
3720 }
3721
3722 if (cnt != hdev->block_cnt)
3723 hci_prio_recalculate(hdev, type);
3724}
3725
3726static void hci_sched_acl(struct hci_dev *hdev)
3727{
3728 BT_DBG("%s", hdev->name);
3729
3730 /* No ACL link over BR/EDR controller */
3731 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
3732 return;
3733
3734 /* No AMP link over AMP controller */
3735 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3736 return;
3737
3738 switch (hdev->flow_ctl_mode) {
3739 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3740 hci_sched_acl_pkt(hdev);
3741 break;
3742
3743 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3744 hci_sched_acl_blk(hdev);
3745 break;
3746 }
3747}
3748
3749static void hci_sched_le(struct hci_dev *hdev)
3750{
3751 struct hci_chan *chan;
3752 struct sk_buff *skb;
3753 int quote, cnt, tmp;
3754
3755 BT_DBG("%s", hdev->name);
3756
3757 if (!hci_conn_num(hdev, LE_LINK))
3758 return;
3759
3760 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3761
3762 __check_timeout(hdev, cnt, LE_LINK);
3763
3764 tmp = cnt;
3765 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3766 u32 priority = (skb_peek(&chan->data_q))->priority;
3767 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3768 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3769 skb->len, skb->priority);
3770
3771 /* Stop if priority has changed */
3772 if (skb->priority < priority)
3773 break;
3774
3775 skb = skb_dequeue(&chan->data_q);
3776
3777 hci_send_frame(hdev, skb);
3778 hdev->le_last_tx = jiffies;
3779
3780 cnt--;
3781 chan->sent++;
3782 chan->conn->sent++;
3783
3784 /* Send pending SCO packets right away */
3785 hci_sched_sco(hdev);
3786 hci_sched_esco(hdev);
3787 }
3788 }
3789
3790 if (hdev->le_pkts)
3791 hdev->le_cnt = cnt;
3792 else
3793 hdev->acl_cnt = cnt;
3794
3795 if (cnt != tmp)
3796 hci_prio_recalculate(hdev, LE_LINK);
3797}
3798
3799/* Schedule CIS */
3800static void hci_sched_iso(struct hci_dev *hdev)
3801{
3802 struct hci_conn *conn;
3803 struct sk_buff *skb;
3804 int quote, *cnt;
3805
3806 BT_DBG("%s", hdev->name);
3807
3808 if (!hci_conn_num(hdev, ISO_LINK))
3809 return;
3810
3811 cnt = hdev->iso_pkts ? &hdev->iso_cnt :
3812 hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3813 while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) {
3814 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3815 BT_DBG("skb %p len %d", skb, skb->len);
3816 hci_send_frame(hdev, skb);
3817
3818 conn->sent++;
3819 if (conn->sent == ~0)
3820 conn->sent = 0;
3821 (*cnt)--;
3822 }
3823 }
3824}
3825
3826static void hci_tx_work(struct work_struct *work)
3827{
3828 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3829 struct sk_buff *skb;
3830
3831 BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
3832 hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
3833
3834 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3835 /* Schedule queues and send stuff to HCI driver */
3836 hci_sched_sco(hdev);
3837 hci_sched_esco(hdev);
3838 hci_sched_iso(hdev);
3839 hci_sched_acl(hdev);
3840 hci_sched_le(hdev);
3841 }
3842
3843 /* Send next queued raw (unknown type) packet */
3844 while ((skb = skb_dequeue(&hdev->raw_q)))
3845 hci_send_frame(hdev, skb);
3846}
3847
3848/* ----- HCI RX task (incoming data processing) ----- */
3849
3850/* ACL data packet */
3851static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3852{
3853 struct hci_acl_hdr *hdr = (void *) skb->data;
3854 struct hci_conn *conn;
3855 __u16 handle, flags;
3856
3857 skb_pull(skb, HCI_ACL_HDR_SIZE);
3858
3859 handle = __le16_to_cpu(hdr->handle);
3860 flags = hci_flags(handle);
3861 handle = hci_handle(handle);
3862
3863 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3864 handle, flags);
3865
3866 hdev->stat.acl_rx++;
3867
3868 hci_dev_lock(hdev);
3869 conn = hci_conn_hash_lookup_handle(hdev, handle);
3870 hci_dev_unlock(hdev);
3871
3872 if (conn) {
3873 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3874
3875 /* Send to upper protocol */
3876 l2cap_recv_acldata(conn, skb, flags);
3877 return;
3878 } else {
3879 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
3880 handle);
3881 }
3882
3883 kfree_skb(skb);
3884}
3885
3886/* SCO data packet */
3887static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3888{
3889 struct hci_sco_hdr *hdr = (void *) skb->data;
3890 struct hci_conn *conn;
3891 __u16 handle, flags;
3892
3893 skb_pull(skb, HCI_SCO_HDR_SIZE);
3894
3895 handle = __le16_to_cpu(hdr->handle);
3896 flags = hci_flags(handle);
3897 handle = hci_handle(handle);
3898
3899 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3900 handle, flags);
3901
3902 hdev->stat.sco_rx++;
3903
3904 hci_dev_lock(hdev);
3905 conn = hci_conn_hash_lookup_handle(hdev, handle);
3906 hci_dev_unlock(hdev);
3907
3908 if (conn) {
3909 /* Send to upper protocol */
3910 hci_skb_pkt_status(skb) = flags & 0x03;
3911 sco_recv_scodata(conn, skb);
3912 return;
3913 } else {
3914 bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
3915 handle);
3916 }
3917
3918 kfree_skb(skb);
3919}
3920
3921static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3922{
3923 struct hci_iso_hdr *hdr;
3924 struct hci_conn *conn;
3925 __u16 handle, flags;
3926
3927 hdr = skb_pull_data(skb, sizeof(*hdr));
3928 if (!hdr) {
3929 bt_dev_err(hdev, "ISO packet too small");
3930 goto drop;
3931 }
3932
3933 handle = __le16_to_cpu(hdr->handle);
3934 flags = hci_flags(handle);
3935 handle = hci_handle(handle);
3936
3937 bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3938 handle, flags);
3939
3940 hci_dev_lock(hdev);
3941 conn = hci_conn_hash_lookup_handle(hdev, handle);
3942 hci_dev_unlock(hdev);
3943
3944 if (!conn) {
3945 bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
3946 handle);
3947 goto drop;
3948 }
3949
3950 /* Send to upper protocol */
3951 iso_recv(conn, skb, flags);
3952 return;
3953
3954drop:
3955 kfree_skb(skb);
3956}
3957
3958static bool hci_req_is_complete(struct hci_dev *hdev)
3959{
3960 struct sk_buff *skb;
3961
3962 skb = skb_peek(&hdev->cmd_q);
3963 if (!skb)
3964 return true;
3965
3966 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
3967}
3968
3969static void hci_resend_last(struct hci_dev *hdev)
3970{
3971 struct hci_command_hdr *sent;
3972 struct sk_buff *skb;
3973 u16 opcode;
3974
3975 if (!hdev->sent_cmd)
3976 return;
3977
3978 sent = (void *) hdev->sent_cmd->data;
3979 opcode = __le16_to_cpu(sent->opcode);
3980 if (opcode == HCI_OP_RESET)
3981 return;
3982
3983 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3984 if (!skb)
3985 return;
3986
3987 skb_queue_head(&hdev->cmd_q, skb);
3988 queue_work(hdev->workqueue, &hdev->cmd_work);
3989}
3990
3991void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
3992 hci_req_complete_t *req_complete,
3993 hci_req_complete_skb_t *req_complete_skb)
3994{
3995 struct sk_buff *skb;
3996 unsigned long flags;
3997
3998 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3999
4000 /* If the completed command doesn't match the last one that was
4001 * sent we need to do special handling of it.
4002 */
4003 if (!hci_sent_cmd_data(hdev, opcode)) {
4004 /* Some CSR based controllers generate a spontaneous
4005 * reset complete event during init and any pending
4006 * command will never be completed. In such a case we
4007 * need to resend whatever was the last sent
4008 * command.
4009 */
4010 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4011 hci_resend_last(hdev);
4012
4013 return;
4014 }
4015
4016 /* If we reach this point this event matches the last command sent */
4017 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4018
4019 /* If the command succeeded and there's still more commands in
4020 * this request the request is not yet complete.
4021 */
4022 if (!status && !hci_req_is_complete(hdev))
4023 return;
4024
4025 /* If this was the last command in a request the complete
4026 * callback would be found in hdev->sent_cmd instead of the
4027 * command queue (hdev->cmd_q).
4028 */
4029 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4030 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4031 return;
4032 }
4033
4034 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4035 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4036 return;
4037 }
4038
4039 /* Remove all pending commands belonging to this request */
4040 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4041 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4042 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4043 __skb_queue_head(&hdev->cmd_q, skb);
4044 break;
4045 }
4046
4047 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4048 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4049 else
4050 *req_complete = bt_cb(skb)->hci.req_complete;
4051 dev_kfree_skb_irq(skb);
4052 }
4053 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4054}
4055
4056static void hci_rx_work(struct work_struct *work)
4057{
4058 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4059 struct sk_buff *skb;
4060
4061 BT_DBG("%s", hdev->name);
4062
4063 /* The kcov_remote functions used for collecting packet parsing
4064 * coverage information from this background thread and associate
4065 * the coverage with the syscall's thread which originally injected
4066 * the packet. This helps fuzzing the kernel.
4067 */
4068 for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
4069 kcov_remote_start_common(skb_get_kcov_handle(skb));
4070
4071 /* Send copy to monitor */
4072 hci_send_to_monitor(hdev, skb);
4073
4074 if (atomic_read(&hdev->promisc)) {
4075 /* Send copy to the sockets */
4076 hci_send_to_sock(hdev, skb);
4077 }
4078
4079 /* If the device has been opened in HCI_USER_CHANNEL,
4080 * the userspace has exclusive access to device.
4081 * When device is HCI_INIT, we still need to process
4082 * the data packets to the driver in order
4083 * to complete its setup().
4084 */
4085 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4086 !test_bit(HCI_INIT, &hdev->flags)) {
4087 kfree_skb(skb);
4088 continue;
4089 }
4090
4091 if (test_bit(HCI_INIT, &hdev->flags)) {
4092 /* Don't process data packets in this states. */
4093 switch (hci_skb_pkt_type(skb)) {
4094 case HCI_ACLDATA_PKT:
4095 case HCI_SCODATA_PKT:
4096 case HCI_ISODATA_PKT:
4097 kfree_skb(skb);
4098 continue;
4099 }
4100 }
4101
4102 /* Process frame */
4103 switch (hci_skb_pkt_type(skb)) {
4104 case HCI_EVENT_PKT:
4105 BT_DBG("%s Event packet", hdev->name);
4106 hci_event_packet(hdev, skb);
4107 break;
4108
4109 case HCI_ACLDATA_PKT:
4110 BT_DBG("%s ACL data packet", hdev->name);
4111 hci_acldata_packet(hdev, skb);
4112 break;
4113
4114 case HCI_SCODATA_PKT:
4115 BT_DBG("%s SCO data packet", hdev->name);
4116 hci_scodata_packet(hdev, skb);
4117 break;
4118
4119 case HCI_ISODATA_PKT:
4120 BT_DBG("%s ISO data packet", hdev->name);
4121 hci_isodata_packet(hdev, skb);
4122 break;
4123
4124 default:
4125 kfree_skb(skb);
4126 break;
4127 }
4128 }
4129}
4130
4131static void hci_cmd_work(struct work_struct *work)
4132{
4133 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4134 struct sk_buff *skb;
4135
4136 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4137 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4138
4139 /* Send queued commands */
4140 if (atomic_read(&hdev->cmd_cnt)) {
4141 skb = skb_dequeue(&hdev->cmd_q);
4142 if (!skb)
4143 return;
4144
4145 kfree_skb(hdev->sent_cmd);
4146
4147 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4148 if (hdev->sent_cmd) {
4149 int res;
4150 if (hci_req_status_pend(hdev))
4151 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4152 atomic_dec(&hdev->cmd_cnt);
4153
4154 res = hci_send_frame(hdev, skb);
4155 if (res < 0)
4156 __hci_cmd_sync_cancel(hdev, -res);
4157
4158 rcu_read_lock();
4159 if (test_bit(HCI_RESET, &hdev->flags) ||
4160 hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
4161 cancel_delayed_work(&hdev->cmd_timer);
4162 else
4163 queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
4164 HCI_CMD_TIMEOUT);
4165 rcu_read_unlock();
4166 } else {
4167 skb_queue_head(&hdev->cmd_q, skb);
4168 queue_work(hdev->workqueue, &hdev->cmd_work);
4169 }
4170 }
4171}