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1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
28#include <linux/export.h>
29#include <linux/idr.h>
30#include <linux/rfkill.h>
31#include <linux/debugfs.h>
32#include <linux/crypto.h>
33#include <asm/unaligned.h>
34
35#include <net/bluetooth/bluetooth.h>
36#include <net/bluetooth/hci_core.h>
37#include <net/bluetooth/l2cap.h>
38#include <net/bluetooth/mgmt.h>
39
40#include "hci_request.h"
41#include "hci_debugfs.h"
42#include "smp.h"
43#include "leds.h"
44
45static void hci_rx_work(struct work_struct *work);
46static void hci_cmd_work(struct work_struct *work);
47static void hci_tx_work(struct work_struct *work);
48
49/* HCI device list */
50LIST_HEAD(hci_dev_list);
51DEFINE_RWLOCK(hci_dev_list_lock);
52
53/* HCI callback list */
54LIST_HEAD(hci_cb_list);
55DEFINE_MUTEX(hci_cb_list_lock);
56
57/* HCI ID Numbering */
58static DEFINE_IDA(hci_index_ida);
59
60/* ---- HCI debugfs entries ---- */
61
62static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
63 size_t count, loff_t *ppos)
64{
65 struct hci_dev *hdev = file->private_data;
66 char buf[3];
67
68 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
69 buf[1] = '\n';
70 buf[2] = '\0';
71 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
72}
73
74static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
75 size_t count, loff_t *ppos)
76{
77 struct hci_dev *hdev = file->private_data;
78 struct sk_buff *skb;
79 char buf[32];
80 size_t buf_size = min(count, (sizeof(buf)-1));
81 bool enable;
82
83 if (!test_bit(HCI_UP, &hdev->flags))
84 return -ENETDOWN;
85
86 if (copy_from_user(buf, user_buf, buf_size))
87 return -EFAULT;
88
89 buf[buf_size] = '\0';
90 if (strtobool(buf, &enable))
91 return -EINVAL;
92
93 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
94 return -EALREADY;
95
96 hci_req_sync_lock(hdev);
97 if (enable)
98 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
99 HCI_CMD_TIMEOUT);
100 else
101 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
102 HCI_CMD_TIMEOUT);
103 hci_req_sync_unlock(hdev);
104
105 if (IS_ERR(skb))
106 return PTR_ERR(skb);
107
108 kfree_skb(skb);
109
110 hci_dev_change_flag(hdev, HCI_DUT_MODE);
111
112 return count;
113}
114
115static const struct file_operations dut_mode_fops = {
116 .open = simple_open,
117 .read = dut_mode_read,
118 .write = dut_mode_write,
119 .llseek = default_llseek,
120};
121
122static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
123 size_t count, loff_t *ppos)
124{
125 struct hci_dev *hdev = file->private_data;
126 char buf[3];
127
128 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
129 buf[1] = '\n';
130 buf[2] = '\0';
131 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
132}
133
134static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
135 size_t count, loff_t *ppos)
136{
137 struct hci_dev *hdev = file->private_data;
138 char buf[32];
139 size_t buf_size = min(count, (sizeof(buf)-1));
140 bool enable;
141 int err;
142
143 if (copy_from_user(buf, user_buf, buf_size))
144 return -EFAULT;
145
146 buf[buf_size] = '\0';
147 if (strtobool(buf, &enable))
148 return -EINVAL;
149
150 /* When the diagnostic flags are not persistent and the transport
151 * is not active, then there is no need for the vendor callback.
152 *
153 * Instead just store the desired value. If needed the setting
154 * will be programmed when the controller gets powered on.
155 */
156 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
157 !test_bit(HCI_RUNNING, &hdev->flags))
158 goto done;
159
160 hci_req_sync_lock(hdev);
161 err = hdev->set_diag(hdev, enable);
162 hci_req_sync_unlock(hdev);
163
164 if (err < 0)
165 return err;
166
167done:
168 if (enable)
169 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
170 else
171 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
172
173 return count;
174}
175
176static const struct file_operations vendor_diag_fops = {
177 .open = simple_open,
178 .read = vendor_diag_read,
179 .write = vendor_diag_write,
180 .llseek = default_llseek,
181};
182
183static void hci_debugfs_create_basic(struct hci_dev *hdev)
184{
185 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
186 &dut_mode_fops);
187
188 if (hdev->set_diag)
189 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
190 &vendor_diag_fops);
191}
192
193static int hci_reset_req(struct hci_request *req, unsigned long opt)
194{
195 BT_DBG("%s %ld", req->hdev->name, opt);
196
197 /* Reset device */
198 set_bit(HCI_RESET, &req->hdev->flags);
199 hci_req_add(req, HCI_OP_RESET, 0, NULL);
200 return 0;
201}
202
203static void bredr_init(struct hci_request *req)
204{
205 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
206
207 /* Read Local Supported Features */
208 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
209
210 /* Read Local Version */
211 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
212
213 /* Read BD Address */
214 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
215}
216
217static void amp_init1(struct hci_request *req)
218{
219 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
220
221 /* Read Local Version */
222 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
223
224 /* Read Local Supported Commands */
225 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
226
227 /* Read Local AMP Info */
228 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
229
230 /* Read Data Blk size */
231 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
232
233 /* Read Flow Control Mode */
234 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
235
236 /* Read Location Data */
237 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
238}
239
240static int amp_init2(struct hci_request *req)
241{
242 /* Read Local Supported Features. Not all AMP controllers
243 * support this so it's placed conditionally in the second
244 * stage init.
245 */
246 if (req->hdev->commands[14] & 0x20)
247 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
248
249 return 0;
250}
251
252static int hci_init1_req(struct hci_request *req, unsigned long opt)
253{
254 struct hci_dev *hdev = req->hdev;
255
256 BT_DBG("%s %ld", hdev->name, opt);
257
258 /* Reset */
259 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
260 hci_reset_req(req, 0);
261
262 switch (hdev->dev_type) {
263 case HCI_BREDR:
264 bredr_init(req);
265 break;
266
267 case HCI_AMP:
268 amp_init1(req);
269 break;
270
271 default:
272 BT_ERR("Unknown device type %d", hdev->dev_type);
273 break;
274 }
275
276 return 0;
277}
278
279static void bredr_setup(struct hci_request *req)
280{
281 __le16 param;
282 __u8 flt_type;
283
284 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
285 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
286
287 /* Read Class of Device */
288 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
289
290 /* Read Local Name */
291 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
292
293 /* Read Voice Setting */
294 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
295
296 /* Read Number of Supported IAC */
297 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
298
299 /* Read Current IAC LAP */
300 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
301
302 /* Clear Event Filters */
303 flt_type = HCI_FLT_CLEAR_ALL;
304 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
305
306 /* Connection accept timeout ~20 secs */
307 param = cpu_to_le16(0x7d00);
308 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
309}
310
311static void le_setup(struct hci_request *req)
312{
313 struct hci_dev *hdev = req->hdev;
314
315 /* Read LE Buffer Size */
316 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
317
318 /* Read LE Local Supported Features */
319 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
320
321 /* Read LE Supported States */
322 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
323
324 /* LE-only controllers have LE implicitly enabled */
325 if (!lmp_bredr_capable(hdev))
326 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
327}
328
329static void hci_setup_event_mask(struct hci_request *req)
330{
331 struct hci_dev *hdev = req->hdev;
332
333 /* The second byte is 0xff instead of 0x9f (two reserved bits
334 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
335 * command otherwise.
336 */
337 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
338
339 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
340 * any event mask for pre 1.2 devices.
341 */
342 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
343 return;
344
345 if (lmp_bredr_capable(hdev)) {
346 events[4] |= 0x01; /* Flow Specification Complete */
347 } else {
348 /* Use a different default for LE-only devices */
349 memset(events, 0, sizeof(events));
350 events[1] |= 0x20; /* Command Complete */
351 events[1] |= 0x40; /* Command Status */
352 events[1] |= 0x80; /* Hardware Error */
353
354 /* If the controller supports the Disconnect command, enable
355 * the corresponding event. In addition enable packet flow
356 * control related events.
357 */
358 if (hdev->commands[0] & 0x20) {
359 events[0] |= 0x10; /* Disconnection Complete */
360 events[2] |= 0x04; /* Number of Completed Packets */
361 events[3] |= 0x02; /* Data Buffer Overflow */
362 }
363
364 /* If the controller supports the Read Remote Version
365 * Information command, enable the corresponding event.
366 */
367 if (hdev->commands[2] & 0x80)
368 events[1] |= 0x08; /* Read Remote Version Information
369 * Complete
370 */
371
372 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
373 events[0] |= 0x80; /* Encryption Change */
374 events[5] |= 0x80; /* Encryption Key Refresh Complete */
375 }
376 }
377
378 if (lmp_inq_rssi_capable(hdev) ||
379 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
380 events[4] |= 0x02; /* Inquiry Result with RSSI */
381
382 if (lmp_ext_feat_capable(hdev))
383 events[4] |= 0x04; /* Read Remote Extended Features Complete */
384
385 if (lmp_esco_capable(hdev)) {
386 events[5] |= 0x08; /* Synchronous Connection Complete */
387 events[5] |= 0x10; /* Synchronous Connection Changed */
388 }
389
390 if (lmp_sniffsubr_capable(hdev))
391 events[5] |= 0x20; /* Sniff Subrating */
392
393 if (lmp_pause_enc_capable(hdev))
394 events[5] |= 0x80; /* Encryption Key Refresh Complete */
395
396 if (lmp_ext_inq_capable(hdev))
397 events[5] |= 0x40; /* Extended Inquiry Result */
398
399 if (lmp_no_flush_capable(hdev))
400 events[7] |= 0x01; /* Enhanced Flush Complete */
401
402 if (lmp_lsto_capable(hdev))
403 events[6] |= 0x80; /* Link Supervision Timeout Changed */
404
405 if (lmp_ssp_capable(hdev)) {
406 events[6] |= 0x01; /* IO Capability Request */
407 events[6] |= 0x02; /* IO Capability Response */
408 events[6] |= 0x04; /* User Confirmation Request */
409 events[6] |= 0x08; /* User Passkey Request */
410 events[6] |= 0x10; /* Remote OOB Data Request */
411 events[6] |= 0x20; /* Simple Pairing Complete */
412 events[7] |= 0x04; /* User Passkey Notification */
413 events[7] |= 0x08; /* Keypress Notification */
414 events[7] |= 0x10; /* Remote Host Supported
415 * Features Notification
416 */
417 }
418
419 if (lmp_le_capable(hdev))
420 events[7] |= 0x20; /* LE Meta-Event */
421
422 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
423}
424
425static int hci_init2_req(struct hci_request *req, unsigned long opt)
426{
427 struct hci_dev *hdev = req->hdev;
428
429 if (hdev->dev_type == HCI_AMP)
430 return amp_init2(req);
431
432 if (lmp_bredr_capable(hdev))
433 bredr_setup(req);
434 else
435 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
436
437 if (lmp_le_capable(hdev))
438 le_setup(req);
439
440 /* All Bluetooth 1.2 and later controllers should support the
441 * HCI command for reading the local supported commands.
442 *
443 * Unfortunately some controllers indicate Bluetooth 1.2 support,
444 * but do not have support for this command. If that is the case,
445 * the driver can quirk the behavior and skip reading the local
446 * supported commands.
447 */
448 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
449 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
450 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
451
452 if (lmp_ssp_capable(hdev)) {
453 /* When SSP is available, then the host features page
454 * should also be available as well. However some
455 * controllers list the max_page as 0 as long as SSP
456 * has not been enabled. To achieve proper debugging
457 * output, force the minimum max_page to 1 at least.
458 */
459 hdev->max_page = 0x01;
460
461 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
462 u8 mode = 0x01;
463
464 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
465 sizeof(mode), &mode);
466 } else {
467 struct hci_cp_write_eir cp;
468
469 memset(hdev->eir, 0, sizeof(hdev->eir));
470 memset(&cp, 0, sizeof(cp));
471
472 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
473 }
474 }
475
476 if (lmp_inq_rssi_capable(hdev) ||
477 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
478 u8 mode;
479
480 /* If Extended Inquiry Result events are supported, then
481 * they are clearly preferred over Inquiry Result with RSSI
482 * events.
483 */
484 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
485
486 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
487 }
488
489 if (lmp_inq_tx_pwr_capable(hdev))
490 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
491
492 if (lmp_ext_feat_capable(hdev)) {
493 struct hci_cp_read_local_ext_features cp;
494
495 cp.page = 0x01;
496 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
497 sizeof(cp), &cp);
498 }
499
500 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
501 u8 enable = 1;
502 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
503 &enable);
504 }
505
506 return 0;
507}
508
509static void hci_setup_link_policy(struct hci_request *req)
510{
511 struct hci_dev *hdev = req->hdev;
512 struct hci_cp_write_def_link_policy cp;
513 u16 link_policy = 0;
514
515 if (lmp_rswitch_capable(hdev))
516 link_policy |= HCI_LP_RSWITCH;
517 if (lmp_hold_capable(hdev))
518 link_policy |= HCI_LP_HOLD;
519 if (lmp_sniff_capable(hdev))
520 link_policy |= HCI_LP_SNIFF;
521 if (lmp_park_capable(hdev))
522 link_policy |= HCI_LP_PARK;
523
524 cp.policy = cpu_to_le16(link_policy);
525 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
526}
527
528static void hci_set_le_support(struct hci_request *req)
529{
530 struct hci_dev *hdev = req->hdev;
531 struct hci_cp_write_le_host_supported cp;
532
533 /* LE-only devices do not support explicit enablement */
534 if (!lmp_bredr_capable(hdev))
535 return;
536
537 memset(&cp, 0, sizeof(cp));
538
539 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
540 cp.le = 0x01;
541 cp.simul = 0x00;
542 }
543
544 if (cp.le != lmp_host_le_capable(hdev))
545 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
546 &cp);
547}
548
549static void hci_set_event_mask_page_2(struct hci_request *req)
550{
551 struct hci_dev *hdev = req->hdev;
552 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
553
554 /* If Connectionless Slave Broadcast master role is supported
555 * enable all necessary events for it.
556 */
557 if (lmp_csb_master_capable(hdev)) {
558 events[1] |= 0x40; /* Triggered Clock Capture */
559 events[1] |= 0x80; /* Synchronization Train Complete */
560 events[2] |= 0x10; /* Slave Page Response Timeout */
561 events[2] |= 0x20; /* CSB Channel Map Change */
562 }
563
564 /* If Connectionless Slave Broadcast slave role is supported
565 * enable all necessary events for it.
566 */
567 if (lmp_csb_slave_capable(hdev)) {
568 events[2] |= 0x01; /* Synchronization Train Received */
569 events[2] |= 0x02; /* CSB Receive */
570 events[2] |= 0x04; /* CSB Timeout */
571 events[2] |= 0x08; /* Truncated Page Complete */
572 }
573
574 /* Enable Authenticated Payload Timeout Expired event if supported */
575 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
576 events[2] |= 0x80;
577
578 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
579}
580
581static int hci_init3_req(struct hci_request *req, unsigned long opt)
582{
583 struct hci_dev *hdev = req->hdev;
584 u8 p;
585
586 hci_setup_event_mask(req);
587
588 if (hdev->commands[6] & 0x20 &&
589 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
590 struct hci_cp_read_stored_link_key cp;
591
592 bacpy(&cp.bdaddr, BDADDR_ANY);
593 cp.read_all = 0x01;
594 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
595 }
596
597 if (hdev->commands[5] & 0x10)
598 hci_setup_link_policy(req);
599
600 if (hdev->commands[8] & 0x01)
601 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
602
603 /* Some older Broadcom based Bluetooth 1.2 controllers do not
604 * support the Read Page Scan Type command. Check support for
605 * this command in the bit mask of supported commands.
606 */
607 if (hdev->commands[13] & 0x01)
608 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
609
610 if (lmp_le_capable(hdev)) {
611 u8 events[8];
612
613 memset(events, 0, sizeof(events));
614
615 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
616 events[0] |= 0x10; /* LE Long Term Key Request */
617
618 /* If controller supports the Connection Parameters Request
619 * Link Layer Procedure, enable the corresponding event.
620 */
621 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
622 events[0] |= 0x20; /* LE Remote Connection
623 * Parameter Request
624 */
625
626 /* If the controller supports the Data Length Extension
627 * feature, enable the corresponding event.
628 */
629 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
630 events[0] |= 0x40; /* LE Data Length Change */
631
632 /* If the controller supports Extended Scanner Filter
633 * Policies, enable the correspondig event.
634 */
635 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
636 events[1] |= 0x04; /* LE Direct Advertising
637 * Report
638 */
639
640 /* If the controller supports the LE Set Scan Enable command,
641 * enable the corresponding advertising report event.
642 */
643 if (hdev->commands[26] & 0x08)
644 events[0] |= 0x02; /* LE Advertising Report */
645
646 /* If the controller supports the LE Create Connection
647 * command, enable the corresponding event.
648 */
649 if (hdev->commands[26] & 0x10)
650 events[0] |= 0x01; /* LE Connection Complete */
651
652 /* If the controller supports the LE Connection Update
653 * command, enable the corresponding event.
654 */
655 if (hdev->commands[27] & 0x04)
656 events[0] |= 0x04; /* LE Connection Update
657 * Complete
658 */
659
660 /* If the controller supports the LE Read Remote Used Features
661 * command, enable the corresponding event.
662 */
663 if (hdev->commands[27] & 0x20)
664 events[0] |= 0x08; /* LE Read Remote Used
665 * Features Complete
666 */
667
668 /* If the controller supports the LE Read Local P-256
669 * Public Key command, enable the corresponding event.
670 */
671 if (hdev->commands[34] & 0x02)
672 events[0] |= 0x80; /* LE Read Local P-256
673 * Public Key Complete
674 */
675
676 /* If the controller supports the LE Generate DHKey
677 * command, enable the corresponding event.
678 */
679 if (hdev->commands[34] & 0x04)
680 events[1] |= 0x01; /* LE Generate DHKey Complete */
681
682 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
683 events);
684
685 if (hdev->commands[25] & 0x40) {
686 /* Read LE Advertising Channel TX Power */
687 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
688 }
689
690 if (hdev->commands[26] & 0x40) {
691 /* Read LE White List Size */
692 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
693 0, NULL);
694 }
695
696 if (hdev->commands[26] & 0x80) {
697 /* Clear LE White List */
698 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
699 }
700
701 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
702 /* Read LE Maximum Data Length */
703 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
704
705 /* Read LE Suggested Default Data Length */
706 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
707 }
708
709 hci_set_le_support(req);
710 }
711
712 /* Read features beyond page 1 if available */
713 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
714 struct hci_cp_read_local_ext_features cp;
715
716 cp.page = p;
717 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
718 sizeof(cp), &cp);
719 }
720
721 return 0;
722}
723
724static int hci_init4_req(struct hci_request *req, unsigned long opt)
725{
726 struct hci_dev *hdev = req->hdev;
727
728 /* Some Broadcom based Bluetooth controllers do not support the
729 * Delete Stored Link Key command. They are clearly indicating its
730 * absence in the bit mask of supported commands.
731 *
732 * Check the supported commands and only if the the command is marked
733 * as supported send it. If not supported assume that the controller
734 * does not have actual support for stored link keys which makes this
735 * command redundant anyway.
736 *
737 * Some controllers indicate that they support handling deleting
738 * stored link keys, but they don't. The quirk lets a driver
739 * just disable this command.
740 */
741 if (hdev->commands[6] & 0x80 &&
742 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
743 struct hci_cp_delete_stored_link_key cp;
744
745 bacpy(&cp.bdaddr, BDADDR_ANY);
746 cp.delete_all = 0x01;
747 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
748 sizeof(cp), &cp);
749 }
750
751 /* Set event mask page 2 if the HCI command for it is supported */
752 if (hdev->commands[22] & 0x04)
753 hci_set_event_mask_page_2(req);
754
755 /* Read local codec list if the HCI command is supported */
756 if (hdev->commands[29] & 0x20)
757 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
758
759 /* Get MWS transport configuration if the HCI command is supported */
760 if (hdev->commands[30] & 0x08)
761 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
762
763 /* Check for Synchronization Train support */
764 if (lmp_sync_train_capable(hdev))
765 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
766
767 /* Enable Secure Connections if supported and configured */
768 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
769 bredr_sc_enabled(hdev)) {
770 u8 support = 0x01;
771
772 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
773 sizeof(support), &support);
774 }
775
776 return 0;
777}
778
779static int __hci_init(struct hci_dev *hdev)
780{
781 int err;
782
783 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
784 if (err < 0)
785 return err;
786
787 if (hci_dev_test_flag(hdev, HCI_SETUP))
788 hci_debugfs_create_basic(hdev);
789
790 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
791 if (err < 0)
792 return err;
793
794 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
795 * BR/EDR/LE type controllers. AMP controllers only need the
796 * first two stages of init.
797 */
798 if (hdev->dev_type != HCI_BREDR)
799 return 0;
800
801 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
802 if (err < 0)
803 return err;
804
805 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
806 if (err < 0)
807 return err;
808
809 /* This function is only called when the controller is actually in
810 * configured state. When the controller is marked as unconfigured,
811 * this initialization procedure is not run.
812 *
813 * It means that it is possible that a controller runs through its
814 * setup phase and then discovers missing settings. If that is the
815 * case, then this function will not be called. It then will only
816 * be called during the config phase.
817 *
818 * So only when in setup phase or config phase, create the debugfs
819 * entries and register the SMP channels.
820 */
821 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
822 !hci_dev_test_flag(hdev, HCI_CONFIG))
823 return 0;
824
825 hci_debugfs_create_common(hdev);
826
827 if (lmp_bredr_capable(hdev))
828 hci_debugfs_create_bredr(hdev);
829
830 if (lmp_le_capable(hdev))
831 hci_debugfs_create_le(hdev);
832
833 return 0;
834}
835
836static int hci_init0_req(struct hci_request *req, unsigned long opt)
837{
838 struct hci_dev *hdev = req->hdev;
839
840 BT_DBG("%s %ld", hdev->name, opt);
841
842 /* Reset */
843 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
844 hci_reset_req(req, 0);
845
846 /* Read Local Version */
847 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
848
849 /* Read BD Address */
850 if (hdev->set_bdaddr)
851 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
852
853 return 0;
854}
855
856static int __hci_unconf_init(struct hci_dev *hdev)
857{
858 int err;
859
860 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
861 return 0;
862
863 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
864 if (err < 0)
865 return err;
866
867 if (hci_dev_test_flag(hdev, HCI_SETUP))
868 hci_debugfs_create_basic(hdev);
869
870 return 0;
871}
872
873static int hci_scan_req(struct hci_request *req, unsigned long opt)
874{
875 __u8 scan = opt;
876
877 BT_DBG("%s %x", req->hdev->name, scan);
878
879 /* Inquiry and Page scans */
880 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
881 return 0;
882}
883
884static int hci_auth_req(struct hci_request *req, unsigned long opt)
885{
886 __u8 auth = opt;
887
888 BT_DBG("%s %x", req->hdev->name, auth);
889
890 /* Authentication */
891 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
892 return 0;
893}
894
895static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
896{
897 __u8 encrypt = opt;
898
899 BT_DBG("%s %x", req->hdev->name, encrypt);
900
901 /* Encryption */
902 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
903 return 0;
904}
905
906static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
907{
908 __le16 policy = cpu_to_le16(opt);
909
910 BT_DBG("%s %x", req->hdev->name, policy);
911
912 /* Default link policy */
913 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
914 return 0;
915}
916
917/* Get HCI device by index.
918 * Device is held on return. */
919struct hci_dev *hci_dev_get(int index)
920{
921 struct hci_dev *hdev = NULL, *d;
922
923 BT_DBG("%d", index);
924
925 if (index < 0)
926 return NULL;
927
928 read_lock(&hci_dev_list_lock);
929 list_for_each_entry(d, &hci_dev_list, list) {
930 if (d->id == index) {
931 hdev = hci_dev_hold(d);
932 break;
933 }
934 }
935 read_unlock(&hci_dev_list_lock);
936 return hdev;
937}
938
939/* ---- Inquiry support ---- */
940
941bool hci_discovery_active(struct hci_dev *hdev)
942{
943 struct discovery_state *discov = &hdev->discovery;
944
945 switch (discov->state) {
946 case DISCOVERY_FINDING:
947 case DISCOVERY_RESOLVING:
948 return true;
949
950 default:
951 return false;
952 }
953}
954
955void hci_discovery_set_state(struct hci_dev *hdev, int state)
956{
957 int old_state = hdev->discovery.state;
958
959 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
960
961 if (old_state == state)
962 return;
963
964 hdev->discovery.state = state;
965
966 switch (state) {
967 case DISCOVERY_STOPPED:
968 hci_update_background_scan(hdev);
969
970 if (old_state != DISCOVERY_STARTING)
971 mgmt_discovering(hdev, 0);
972 break;
973 case DISCOVERY_STARTING:
974 break;
975 case DISCOVERY_FINDING:
976 mgmt_discovering(hdev, 1);
977 break;
978 case DISCOVERY_RESOLVING:
979 break;
980 case DISCOVERY_STOPPING:
981 break;
982 }
983}
984
985void hci_inquiry_cache_flush(struct hci_dev *hdev)
986{
987 struct discovery_state *cache = &hdev->discovery;
988 struct inquiry_entry *p, *n;
989
990 list_for_each_entry_safe(p, n, &cache->all, all) {
991 list_del(&p->all);
992 kfree(p);
993 }
994
995 INIT_LIST_HEAD(&cache->unknown);
996 INIT_LIST_HEAD(&cache->resolve);
997}
998
999struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1000 bdaddr_t *bdaddr)
1001{
1002 struct discovery_state *cache = &hdev->discovery;
1003 struct inquiry_entry *e;
1004
1005 BT_DBG("cache %p, %pMR", cache, bdaddr);
1006
1007 list_for_each_entry(e, &cache->all, all) {
1008 if (!bacmp(&e->data.bdaddr, bdaddr))
1009 return e;
1010 }
1011
1012 return NULL;
1013}
1014
1015struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1016 bdaddr_t *bdaddr)
1017{
1018 struct discovery_state *cache = &hdev->discovery;
1019 struct inquiry_entry *e;
1020
1021 BT_DBG("cache %p, %pMR", cache, bdaddr);
1022
1023 list_for_each_entry(e, &cache->unknown, list) {
1024 if (!bacmp(&e->data.bdaddr, bdaddr))
1025 return e;
1026 }
1027
1028 return NULL;
1029}
1030
1031struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1032 bdaddr_t *bdaddr,
1033 int state)
1034{
1035 struct discovery_state *cache = &hdev->discovery;
1036 struct inquiry_entry *e;
1037
1038 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1039
1040 list_for_each_entry(e, &cache->resolve, list) {
1041 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1042 return e;
1043 if (!bacmp(&e->data.bdaddr, bdaddr))
1044 return e;
1045 }
1046
1047 return NULL;
1048}
1049
1050void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1051 struct inquiry_entry *ie)
1052{
1053 struct discovery_state *cache = &hdev->discovery;
1054 struct list_head *pos = &cache->resolve;
1055 struct inquiry_entry *p;
1056
1057 list_del(&ie->list);
1058
1059 list_for_each_entry(p, &cache->resolve, list) {
1060 if (p->name_state != NAME_PENDING &&
1061 abs(p->data.rssi) >= abs(ie->data.rssi))
1062 break;
1063 pos = &p->list;
1064 }
1065
1066 list_add(&ie->list, pos);
1067}
1068
1069u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1070 bool name_known)
1071{
1072 struct discovery_state *cache = &hdev->discovery;
1073 struct inquiry_entry *ie;
1074 u32 flags = 0;
1075
1076 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1077
1078 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1079
1080 if (!data->ssp_mode)
1081 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1082
1083 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1084 if (ie) {
1085 if (!ie->data.ssp_mode)
1086 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1087
1088 if (ie->name_state == NAME_NEEDED &&
1089 data->rssi != ie->data.rssi) {
1090 ie->data.rssi = data->rssi;
1091 hci_inquiry_cache_update_resolve(hdev, ie);
1092 }
1093
1094 goto update;
1095 }
1096
1097 /* Entry not in the cache. Add new one. */
1098 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1099 if (!ie) {
1100 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1101 goto done;
1102 }
1103
1104 list_add(&ie->all, &cache->all);
1105
1106 if (name_known) {
1107 ie->name_state = NAME_KNOWN;
1108 } else {
1109 ie->name_state = NAME_NOT_KNOWN;
1110 list_add(&ie->list, &cache->unknown);
1111 }
1112
1113update:
1114 if (name_known && ie->name_state != NAME_KNOWN &&
1115 ie->name_state != NAME_PENDING) {
1116 ie->name_state = NAME_KNOWN;
1117 list_del(&ie->list);
1118 }
1119
1120 memcpy(&ie->data, data, sizeof(*data));
1121 ie->timestamp = jiffies;
1122 cache->timestamp = jiffies;
1123
1124 if (ie->name_state == NAME_NOT_KNOWN)
1125 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1126
1127done:
1128 return flags;
1129}
1130
1131static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1132{
1133 struct discovery_state *cache = &hdev->discovery;
1134 struct inquiry_info *info = (struct inquiry_info *) buf;
1135 struct inquiry_entry *e;
1136 int copied = 0;
1137
1138 list_for_each_entry(e, &cache->all, all) {
1139 struct inquiry_data *data = &e->data;
1140
1141 if (copied >= num)
1142 break;
1143
1144 bacpy(&info->bdaddr, &data->bdaddr);
1145 info->pscan_rep_mode = data->pscan_rep_mode;
1146 info->pscan_period_mode = data->pscan_period_mode;
1147 info->pscan_mode = data->pscan_mode;
1148 memcpy(info->dev_class, data->dev_class, 3);
1149 info->clock_offset = data->clock_offset;
1150
1151 info++;
1152 copied++;
1153 }
1154
1155 BT_DBG("cache %p, copied %d", cache, copied);
1156 return copied;
1157}
1158
1159static int hci_inq_req(struct hci_request *req, unsigned long opt)
1160{
1161 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1162 struct hci_dev *hdev = req->hdev;
1163 struct hci_cp_inquiry cp;
1164
1165 BT_DBG("%s", hdev->name);
1166
1167 if (test_bit(HCI_INQUIRY, &hdev->flags))
1168 return 0;
1169
1170 /* Start Inquiry */
1171 memcpy(&cp.lap, &ir->lap, 3);
1172 cp.length = ir->length;
1173 cp.num_rsp = ir->num_rsp;
1174 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1175
1176 return 0;
1177}
1178
1179int hci_inquiry(void __user *arg)
1180{
1181 __u8 __user *ptr = arg;
1182 struct hci_inquiry_req ir;
1183 struct hci_dev *hdev;
1184 int err = 0, do_inquiry = 0, max_rsp;
1185 long timeo;
1186 __u8 *buf;
1187
1188 if (copy_from_user(&ir, ptr, sizeof(ir)))
1189 return -EFAULT;
1190
1191 hdev = hci_dev_get(ir.dev_id);
1192 if (!hdev)
1193 return -ENODEV;
1194
1195 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1196 err = -EBUSY;
1197 goto done;
1198 }
1199
1200 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1201 err = -EOPNOTSUPP;
1202 goto done;
1203 }
1204
1205 if (hdev->dev_type != HCI_BREDR) {
1206 err = -EOPNOTSUPP;
1207 goto done;
1208 }
1209
1210 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1211 err = -EOPNOTSUPP;
1212 goto done;
1213 }
1214
1215 hci_dev_lock(hdev);
1216 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1217 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1218 hci_inquiry_cache_flush(hdev);
1219 do_inquiry = 1;
1220 }
1221 hci_dev_unlock(hdev);
1222
1223 timeo = ir.length * msecs_to_jiffies(2000);
1224
1225 if (do_inquiry) {
1226 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1227 timeo, NULL);
1228 if (err < 0)
1229 goto done;
1230
1231 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1232 * cleared). If it is interrupted by a signal, return -EINTR.
1233 */
1234 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1235 TASK_INTERRUPTIBLE))
1236 return -EINTR;
1237 }
1238
1239 /* for unlimited number of responses we will use buffer with
1240 * 255 entries
1241 */
1242 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1243
1244 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1245 * copy it to the user space.
1246 */
1247 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1248 if (!buf) {
1249 err = -ENOMEM;
1250 goto done;
1251 }
1252
1253 hci_dev_lock(hdev);
1254 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1255 hci_dev_unlock(hdev);
1256
1257 BT_DBG("num_rsp %d", ir.num_rsp);
1258
1259 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1260 ptr += sizeof(ir);
1261 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1262 ir.num_rsp))
1263 err = -EFAULT;
1264 } else
1265 err = -EFAULT;
1266
1267 kfree(buf);
1268
1269done:
1270 hci_dev_put(hdev);
1271 return err;
1272}
1273
1274static int hci_dev_do_open(struct hci_dev *hdev)
1275{
1276 int ret = 0;
1277
1278 BT_DBG("%s %p", hdev->name, hdev);
1279
1280 hci_req_sync_lock(hdev);
1281
1282 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1283 ret = -ENODEV;
1284 goto done;
1285 }
1286
1287 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1288 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1289 /* Check for rfkill but allow the HCI setup stage to
1290 * proceed (which in itself doesn't cause any RF activity).
1291 */
1292 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1293 ret = -ERFKILL;
1294 goto done;
1295 }
1296
1297 /* Check for valid public address or a configured static
1298 * random adddress, but let the HCI setup proceed to
1299 * be able to determine if there is a public address
1300 * or not.
1301 *
1302 * In case of user channel usage, it is not important
1303 * if a public address or static random address is
1304 * available.
1305 *
1306 * This check is only valid for BR/EDR controllers
1307 * since AMP controllers do not have an address.
1308 */
1309 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1310 hdev->dev_type == HCI_BREDR &&
1311 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1312 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1313 ret = -EADDRNOTAVAIL;
1314 goto done;
1315 }
1316 }
1317
1318 if (test_bit(HCI_UP, &hdev->flags)) {
1319 ret = -EALREADY;
1320 goto done;
1321 }
1322
1323 if (hdev->open(hdev)) {
1324 ret = -EIO;
1325 goto done;
1326 }
1327
1328 set_bit(HCI_RUNNING, &hdev->flags);
1329 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1330
1331 atomic_set(&hdev->cmd_cnt, 1);
1332 set_bit(HCI_INIT, &hdev->flags);
1333
1334 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1335 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1336
1337 if (hdev->setup)
1338 ret = hdev->setup(hdev);
1339
1340 /* The transport driver can set these quirks before
1341 * creating the HCI device or in its setup callback.
1342 *
1343 * In case any of them is set, the controller has to
1344 * start up as unconfigured.
1345 */
1346 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1347 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1348 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1349
1350 /* For an unconfigured controller it is required to
1351 * read at least the version information provided by
1352 * the Read Local Version Information command.
1353 *
1354 * If the set_bdaddr driver callback is provided, then
1355 * also the original Bluetooth public device address
1356 * will be read using the Read BD Address command.
1357 */
1358 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1359 ret = __hci_unconf_init(hdev);
1360 }
1361
1362 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1363 /* If public address change is configured, ensure that
1364 * the address gets programmed. If the driver does not
1365 * support changing the public address, fail the power
1366 * on procedure.
1367 */
1368 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1369 hdev->set_bdaddr)
1370 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1371 else
1372 ret = -EADDRNOTAVAIL;
1373 }
1374
1375 if (!ret) {
1376 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1377 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1378 ret = __hci_init(hdev);
1379 if (!ret && hdev->post_init)
1380 ret = hdev->post_init(hdev);
1381 }
1382 }
1383
1384 /* If the HCI Reset command is clearing all diagnostic settings,
1385 * then they need to be reprogrammed after the init procedure
1386 * completed.
1387 */
1388 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1389 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1390 ret = hdev->set_diag(hdev, true);
1391
1392 clear_bit(HCI_INIT, &hdev->flags);
1393
1394 if (!ret) {
1395 hci_dev_hold(hdev);
1396 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1397 set_bit(HCI_UP, &hdev->flags);
1398 hci_sock_dev_event(hdev, HCI_DEV_UP);
1399 hci_leds_update_powered(hdev, true);
1400 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1401 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1402 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1403 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1404 hci_dev_test_flag(hdev, HCI_MGMT) &&
1405 hdev->dev_type == HCI_BREDR) {
1406 ret = __hci_req_hci_power_on(hdev);
1407 mgmt_power_on(hdev, ret);
1408 }
1409 } else {
1410 /* Init failed, cleanup */
1411 flush_work(&hdev->tx_work);
1412 flush_work(&hdev->cmd_work);
1413 flush_work(&hdev->rx_work);
1414
1415 skb_queue_purge(&hdev->cmd_q);
1416 skb_queue_purge(&hdev->rx_q);
1417
1418 if (hdev->flush)
1419 hdev->flush(hdev);
1420
1421 if (hdev->sent_cmd) {
1422 kfree_skb(hdev->sent_cmd);
1423 hdev->sent_cmd = NULL;
1424 }
1425
1426 clear_bit(HCI_RUNNING, &hdev->flags);
1427 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1428
1429 hdev->close(hdev);
1430 hdev->flags &= BIT(HCI_RAW);
1431 }
1432
1433done:
1434 hci_req_sync_unlock(hdev);
1435 return ret;
1436}
1437
1438/* ---- HCI ioctl helpers ---- */
1439
1440int hci_dev_open(__u16 dev)
1441{
1442 struct hci_dev *hdev;
1443 int err;
1444
1445 hdev = hci_dev_get(dev);
1446 if (!hdev)
1447 return -ENODEV;
1448
1449 /* Devices that are marked as unconfigured can only be powered
1450 * up as user channel. Trying to bring them up as normal devices
1451 * will result into a failure. Only user channel operation is
1452 * possible.
1453 *
1454 * When this function is called for a user channel, the flag
1455 * HCI_USER_CHANNEL will be set first before attempting to
1456 * open the device.
1457 */
1458 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1459 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1460 err = -EOPNOTSUPP;
1461 goto done;
1462 }
1463
1464 /* We need to ensure that no other power on/off work is pending
1465 * before proceeding to call hci_dev_do_open. This is
1466 * particularly important if the setup procedure has not yet
1467 * completed.
1468 */
1469 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1470 cancel_delayed_work(&hdev->power_off);
1471
1472 /* After this call it is guaranteed that the setup procedure
1473 * has finished. This means that error conditions like RFKILL
1474 * or no valid public or static random address apply.
1475 */
1476 flush_workqueue(hdev->req_workqueue);
1477
1478 /* For controllers not using the management interface and that
1479 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1480 * so that pairing works for them. Once the management interface
1481 * is in use this bit will be cleared again and userspace has
1482 * to explicitly enable it.
1483 */
1484 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1485 !hci_dev_test_flag(hdev, HCI_MGMT))
1486 hci_dev_set_flag(hdev, HCI_BONDABLE);
1487
1488 err = hci_dev_do_open(hdev);
1489
1490done:
1491 hci_dev_put(hdev);
1492 return err;
1493}
1494
1495/* This function requires the caller holds hdev->lock */
1496static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1497{
1498 struct hci_conn_params *p;
1499
1500 list_for_each_entry(p, &hdev->le_conn_params, list) {
1501 if (p->conn) {
1502 hci_conn_drop(p->conn);
1503 hci_conn_put(p->conn);
1504 p->conn = NULL;
1505 }
1506 list_del_init(&p->action);
1507 }
1508
1509 BT_DBG("All LE pending actions cleared");
1510}
1511
1512int hci_dev_do_close(struct hci_dev *hdev)
1513{
1514 bool auto_off;
1515
1516 BT_DBG("%s %p", hdev->name, hdev);
1517
1518 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1519 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1520 test_bit(HCI_UP, &hdev->flags)) {
1521 /* Execute vendor specific shutdown routine */
1522 if (hdev->shutdown)
1523 hdev->shutdown(hdev);
1524 }
1525
1526 cancel_delayed_work(&hdev->power_off);
1527
1528 hci_request_cancel_all(hdev);
1529 hci_req_sync_lock(hdev);
1530
1531 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1532 cancel_delayed_work_sync(&hdev->cmd_timer);
1533 hci_req_sync_unlock(hdev);
1534 return 0;
1535 }
1536
1537 hci_leds_update_powered(hdev, false);
1538
1539 /* Flush RX and TX works */
1540 flush_work(&hdev->tx_work);
1541 flush_work(&hdev->rx_work);
1542
1543 if (hdev->discov_timeout > 0) {
1544 hdev->discov_timeout = 0;
1545 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1546 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1547 }
1548
1549 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1550 cancel_delayed_work(&hdev->service_cache);
1551
1552 if (hci_dev_test_flag(hdev, HCI_MGMT))
1553 cancel_delayed_work_sync(&hdev->rpa_expired);
1554
1555 /* Avoid potential lockdep warnings from the *_flush() calls by
1556 * ensuring the workqueue is empty up front.
1557 */
1558 drain_workqueue(hdev->workqueue);
1559
1560 hci_dev_lock(hdev);
1561
1562 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1563
1564 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1565
1566 if (!auto_off && hdev->dev_type == HCI_BREDR &&
1567 hci_dev_test_flag(hdev, HCI_MGMT))
1568 __mgmt_power_off(hdev);
1569
1570 hci_inquiry_cache_flush(hdev);
1571 hci_pend_le_actions_clear(hdev);
1572 hci_conn_hash_flush(hdev);
1573 hci_dev_unlock(hdev);
1574
1575 smp_unregister(hdev);
1576
1577 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1578
1579 if (hdev->flush)
1580 hdev->flush(hdev);
1581
1582 /* Reset device */
1583 skb_queue_purge(&hdev->cmd_q);
1584 atomic_set(&hdev->cmd_cnt, 1);
1585 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1586 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1587 set_bit(HCI_INIT, &hdev->flags);
1588 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1589 clear_bit(HCI_INIT, &hdev->flags);
1590 }
1591
1592 /* flush cmd work */
1593 flush_work(&hdev->cmd_work);
1594
1595 /* Drop queues */
1596 skb_queue_purge(&hdev->rx_q);
1597 skb_queue_purge(&hdev->cmd_q);
1598 skb_queue_purge(&hdev->raw_q);
1599
1600 /* Drop last sent command */
1601 if (hdev->sent_cmd) {
1602 cancel_delayed_work_sync(&hdev->cmd_timer);
1603 kfree_skb(hdev->sent_cmd);
1604 hdev->sent_cmd = NULL;
1605 }
1606
1607 clear_bit(HCI_RUNNING, &hdev->flags);
1608 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1609
1610 /* After this point our queues are empty
1611 * and no tasks are scheduled. */
1612 hdev->close(hdev);
1613
1614 /* Clear flags */
1615 hdev->flags &= BIT(HCI_RAW);
1616 hci_dev_clear_volatile_flags(hdev);
1617
1618 /* Controller radio is available but is currently powered down */
1619 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1620
1621 memset(hdev->eir, 0, sizeof(hdev->eir));
1622 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1623 bacpy(&hdev->random_addr, BDADDR_ANY);
1624
1625 hci_req_sync_unlock(hdev);
1626
1627 hci_dev_put(hdev);
1628 return 0;
1629}
1630
1631int hci_dev_close(__u16 dev)
1632{
1633 struct hci_dev *hdev;
1634 int err;
1635
1636 hdev = hci_dev_get(dev);
1637 if (!hdev)
1638 return -ENODEV;
1639
1640 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1641 err = -EBUSY;
1642 goto done;
1643 }
1644
1645 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1646 cancel_delayed_work(&hdev->power_off);
1647
1648 err = hci_dev_do_close(hdev);
1649
1650done:
1651 hci_dev_put(hdev);
1652 return err;
1653}
1654
1655static int hci_dev_do_reset(struct hci_dev *hdev)
1656{
1657 int ret;
1658
1659 BT_DBG("%s %p", hdev->name, hdev);
1660
1661 hci_req_sync_lock(hdev);
1662
1663 /* Drop queues */
1664 skb_queue_purge(&hdev->rx_q);
1665 skb_queue_purge(&hdev->cmd_q);
1666
1667 /* Avoid potential lockdep warnings from the *_flush() calls by
1668 * ensuring the workqueue is empty up front.
1669 */
1670 drain_workqueue(hdev->workqueue);
1671
1672 hci_dev_lock(hdev);
1673 hci_inquiry_cache_flush(hdev);
1674 hci_conn_hash_flush(hdev);
1675 hci_dev_unlock(hdev);
1676
1677 if (hdev->flush)
1678 hdev->flush(hdev);
1679
1680 atomic_set(&hdev->cmd_cnt, 1);
1681 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1682
1683 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1684
1685 hci_req_sync_unlock(hdev);
1686 return ret;
1687}
1688
1689int hci_dev_reset(__u16 dev)
1690{
1691 struct hci_dev *hdev;
1692 int err;
1693
1694 hdev = hci_dev_get(dev);
1695 if (!hdev)
1696 return -ENODEV;
1697
1698 if (!test_bit(HCI_UP, &hdev->flags)) {
1699 err = -ENETDOWN;
1700 goto done;
1701 }
1702
1703 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1704 err = -EBUSY;
1705 goto done;
1706 }
1707
1708 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1709 err = -EOPNOTSUPP;
1710 goto done;
1711 }
1712
1713 err = hci_dev_do_reset(hdev);
1714
1715done:
1716 hci_dev_put(hdev);
1717 return err;
1718}
1719
1720int hci_dev_reset_stat(__u16 dev)
1721{
1722 struct hci_dev *hdev;
1723 int ret = 0;
1724
1725 hdev = hci_dev_get(dev);
1726 if (!hdev)
1727 return -ENODEV;
1728
1729 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1730 ret = -EBUSY;
1731 goto done;
1732 }
1733
1734 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1735 ret = -EOPNOTSUPP;
1736 goto done;
1737 }
1738
1739 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1740
1741done:
1742 hci_dev_put(hdev);
1743 return ret;
1744}
1745
1746static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1747{
1748 bool conn_changed, discov_changed;
1749
1750 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1751
1752 if ((scan & SCAN_PAGE))
1753 conn_changed = !hci_dev_test_and_set_flag(hdev,
1754 HCI_CONNECTABLE);
1755 else
1756 conn_changed = hci_dev_test_and_clear_flag(hdev,
1757 HCI_CONNECTABLE);
1758
1759 if ((scan & SCAN_INQUIRY)) {
1760 discov_changed = !hci_dev_test_and_set_flag(hdev,
1761 HCI_DISCOVERABLE);
1762 } else {
1763 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1764 discov_changed = hci_dev_test_and_clear_flag(hdev,
1765 HCI_DISCOVERABLE);
1766 }
1767
1768 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1769 return;
1770
1771 if (conn_changed || discov_changed) {
1772 /* In case this was disabled through mgmt */
1773 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1774
1775 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1776 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1777
1778 mgmt_new_settings(hdev);
1779 }
1780}
1781
1782int hci_dev_cmd(unsigned int cmd, void __user *arg)
1783{
1784 struct hci_dev *hdev;
1785 struct hci_dev_req dr;
1786 int err = 0;
1787
1788 if (copy_from_user(&dr, arg, sizeof(dr)))
1789 return -EFAULT;
1790
1791 hdev = hci_dev_get(dr.dev_id);
1792 if (!hdev)
1793 return -ENODEV;
1794
1795 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1796 err = -EBUSY;
1797 goto done;
1798 }
1799
1800 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1801 err = -EOPNOTSUPP;
1802 goto done;
1803 }
1804
1805 if (hdev->dev_type != HCI_BREDR) {
1806 err = -EOPNOTSUPP;
1807 goto done;
1808 }
1809
1810 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1811 err = -EOPNOTSUPP;
1812 goto done;
1813 }
1814
1815 switch (cmd) {
1816 case HCISETAUTH:
1817 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1818 HCI_INIT_TIMEOUT, NULL);
1819 break;
1820
1821 case HCISETENCRYPT:
1822 if (!lmp_encrypt_capable(hdev)) {
1823 err = -EOPNOTSUPP;
1824 break;
1825 }
1826
1827 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1828 /* Auth must be enabled first */
1829 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1830 HCI_INIT_TIMEOUT, NULL);
1831 if (err)
1832 break;
1833 }
1834
1835 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1836 HCI_INIT_TIMEOUT, NULL);
1837 break;
1838
1839 case HCISETSCAN:
1840 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1841 HCI_INIT_TIMEOUT, NULL);
1842
1843 /* Ensure that the connectable and discoverable states
1844 * get correctly modified as this was a non-mgmt change.
1845 */
1846 if (!err)
1847 hci_update_scan_state(hdev, dr.dev_opt);
1848 break;
1849
1850 case HCISETLINKPOL:
1851 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1852 HCI_INIT_TIMEOUT, NULL);
1853 break;
1854
1855 case HCISETLINKMODE:
1856 hdev->link_mode = ((__u16) dr.dev_opt) &
1857 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1858 break;
1859
1860 case HCISETPTYPE:
1861 hdev->pkt_type = (__u16) dr.dev_opt;
1862 break;
1863
1864 case HCISETACLMTU:
1865 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1866 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1867 break;
1868
1869 case HCISETSCOMTU:
1870 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1871 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1872 break;
1873
1874 default:
1875 err = -EINVAL;
1876 break;
1877 }
1878
1879done:
1880 hci_dev_put(hdev);
1881 return err;
1882}
1883
1884int hci_get_dev_list(void __user *arg)
1885{
1886 struct hci_dev *hdev;
1887 struct hci_dev_list_req *dl;
1888 struct hci_dev_req *dr;
1889 int n = 0, size, err;
1890 __u16 dev_num;
1891
1892 if (get_user(dev_num, (__u16 __user *) arg))
1893 return -EFAULT;
1894
1895 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1896 return -EINVAL;
1897
1898 size = sizeof(*dl) + dev_num * sizeof(*dr);
1899
1900 dl = kzalloc(size, GFP_KERNEL);
1901 if (!dl)
1902 return -ENOMEM;
1903
1904 dr = dl->dev_req;
1905
1906 read_lock(&hci_dev_list_lock);
1907 list_for_each_entry(hdev, &hci_dev_list, list) {
1908 unsigned long flags = hdev->flags;
1909
1910 /* When the auto-off is configured it means the transport
1911 * is running, but in that case still indicate that the
1912 * device is actually down.
1913 */
1914 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1915 flags &= ~BIT(HCI_UP);
1916
1917 (dr + n)->dev_id = hdev->id;
1918 (dr + n)->dev_opt = flags;
1919
1920 if (++n >= dev_num)
1921 break;
1922 }
1923 read_unlock(&hci_dev_list_lock);
1924
1925 dl->dev_num = n;
1926 size = sizeof(*dl) + n * sizeof(*dr);
1927
1928 err = copy_to_user(arg, dl, size);
1929 kfree(dl);
1930
1931 return err ? -EFAULT : 0;
1932}
1933
1934int hci_get_dev_info(void __user *arg)
1935{
1936 struct hci_dev *hdev;
1937 struct hci_dev_info di;
1938 unsigned long flags;
1939 int err = 0;
1940
1941 if (copy_from_user(&di, arg, sizeof(di)))
1942 return -EFAULT;
1943
1944 hdev = hci_dev_get(di.dev_id);
1945 if (!hdev)
1946 return -ENODEV;
1947
1948 /* When the auto-off is configured it means the transport
1949 * is running, but in that case still indicate that the
1950 * device is actually down.
1951 */
1952 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1953 flags = hdev->flags & ~BIT(HCI_UP);
1954 else
1955 flags = hdev->flags;
1956
1957 strcpy(di.name, hdev->name);
1958 di.bdaddr = hdev->bdaddr;
1959 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
1960 di.flags = flags;
1961 di.pkt_type = hdev->pkt_type;
1962 if (lmp_bredr_capable(hdev)) {
1963 di.acl_mtu = hdev->acl_mtu;
1964 di.acl_pkts = hdev->acl_pkts;
1965 di.sco_mtu = hdev->sco_mtu;
1966 di.sco_pkts = hdev->sco_pkts;
1967 } else {
1968 di.acl_mtu = hdev->le_mtu;
1969 di.acl_pkts = hdev->le_pkts;
1970 di.sco_mtu = 0;
1971 di.sco_pkts = 0;
1972 }
1973 di.link_policy = hdev->link_policy;
1974 di.link_mode = hdev->link_mode;
1975
1976 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1977 memcpy(&di.features, &hdev->features, sizeof(di.features));
1978
1979 if (copy_to_user(arg, &di, sizeof(di)))
1980 err = -EFAULT;
1981
1982 hci_dev_put(hdev);
1983
1984 return err;
1985}
1986
1987/* ---- Interface to HCI drivers ---- */
1988
1989static int hci_rfkill_set_block(void *data, bool blocked)
1990{
1991 struct hci_dev *hdev = data;
1992
1993 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1994
1995 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
1996 return -EBUSY;
1997
1998 if (blocked) {
1999 hci_dev_set_flag(hdev, HCI_RFKILLED);
2000 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2001 !hci_dev_test_flag(hdev, HCI_CONFIG))
2002 hci_dev_do_close(hdev);
2003 } else {
2004 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2005 }
2006
2007 return 0;
2008}
2009
2010static const struct rfkill_ops hci_rfkill_ops = {
2011 .set_block = hci_rfkill_set_block,
2012};
2013
2014static void hci_power_on(struct work_struct *work)
2015{
2016 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2017 int err;
2018
2019 BT_DBG("%s", hdev->name);
2020
2021 if (test_bit(HCI_UP, &hdev->flags) &&
2022 hci_dev_test_flag(hdev, HCI_MGMT) &&
2023 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2024 cancel_delayed_work(&hdev->power_off);
2025 hci_req_sync_lock(hdev);
2026 err = __hci_req_hci_power_on(hdev);
2027 hci_req_sync_unlock(hdev);
2028 mgmt_power_on(hdev, err);
2029 return;
2030 }
2031
2032 err = hci_dev_do_open(hdev);
2033 if (err < 0) {
2034 hci_dev_lock(hdev);
2035 mgmt_set_powered_failed(hdev, err);
2036 hci_dev_unlock(hdev);
2037 return;
2038 }
2039
2040 /* During the HCI setup phase, a few error conditions are
2041 * ignored and they need to be checked now. If they are still
2042 * valid, it is important to turn the device back off.
2043 */
2044 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2045 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2046 (hdev->dev_type == HCI_BREDR &&
2047 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2048 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2049 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2050 hci_dev_do_close(hdev);
2051 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2052 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2053 HCI_AUTO_OFF_TIMEOUT);
2054 }
2055
2056 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2057 /* For unconfigured devices, set the HCI_RAW flag
2058 * so that userspace can easily identify them.
2059 */
2060 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2061 set_bit(HCI_RAW, &hdev->flags);
2062
2063 /* For fully configured devices, this will send
2064 * the Index Added event. For unconfigured devices,
2065 * it will send Unconfigued Index Added event.
2066 *
2067 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2068 * and no event will be send.
2069 */
2070 mgmt_index_added(hdev);
2071 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2072 /* When the controller is now configured, then it
2073 * is important to clear the HCI_RAW flag.
2074 */
2075 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2076 clear_bit(HCI_RAW, &hdev->flags);
2077
2078 /* Powering on the controller with HCI_CONFIG set only
2079 * happens with the transition from unconfigured to
2080 * configured. This will send the Index Added event.
2081 */
2082 mgmt_index_added(hdev);
2083 }
2084}
2085
2086static void hci_power_off(struct work_struct *work)
2087{
2088 struct hci_dev *hdev = container_of(work, struct hci_dev,
2089 power_off.work);
2090
2091 BT_DBG("%s", hdev->name);
2092
2093 hci_dev_do_close(hdev);
2094}
2095
2096static void hci_error_reset(struct work_struct *work)
2097{
2098 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2099
2100 BT_DBG("%s", hdev->name);
2101
2102 if (hdev->hw_error)
2103 hdev->hw_error(hdev, hdev->hw_error_code);
2104 else
2105 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2106 hdev->hw_error_code);
2107
2108 if (hci_dev_do_close(hdev))
2109 return;
2110
2111 hci_dev_do_open(hdev);
2112}
2113
2114void hci_uuids_clear(struct hci_dev *hdev)
2115{
2116 struct bt_uuid *uuid, *tmp;
2117
2118 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2119 list_del(&uuid->list);
2120 kfree(uuid);
2121 }
2122}
2123
2124void hci_link_keys_clear(struct hci_dev *hdev)
2125{
2126 struct link_key *key;
2127
2128 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2129 list_del_rcu(&key->list);
2130 kfree_rcu(key, rcu);
2131 }
2132}
2133
2134void hci_smp_ltks_clear(struct hci_dev *hdev)
2135{
2136 struct smp_ltk *k;
2137
2138 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2139 list_del_rcu(&k->list);
2140 kfree_rcu(k, rcu);
2141 }
2142}
2143
2144void hci_smp_irks_clear(struct hci_dev *hdev)
2145{
2146 struct smp_irk *k;
2147
2148 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2149 list_del_rcu(&k->list);
2150 kfree_rcu(k, rcu);
2151 }
2152}
2153
2154struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2155{
2156 struct link_key *k;
2157
2158 rcu_read_lock();
2159 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2160 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2161 rcu_read_unlock();
2162 return k;
2163 }
2164 }
2165 rcu_read_unlock();
2166
2167 return NULL;
2168}
2169
2170static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2171 u8 key_type, u8 old_key_type)
2172{
2173 /* Legacy key */
2174 if (key_type < 0x03)
2175 return true;
2176
2177 /* Debug keys are insecure so don't store them persistently */
2178 if (key_type == HCI_LK_DEBUG_COMBINATION)
2179 return false;
2180
2181 /* Changed combination key and there's no previous one */
2182 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2183 return false;
2184
2185 /* Security mode 3 case */
2186 if (!conn)
2187 return true;
2188
2189 /* BR/EDR key derived using SC from an LE link */
2190 if (conn->type == LE_LINK)
2191 return true;
2192
2193 /* Neither local nor remote side had no-bonding as requirement */
2194 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2195 return true;
2196
2197 /* Local side had dedicated bonding as requirement */
2198 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2199 return true;
2200
2201 /* Remote side had dedicated bonding as requirement */
2202 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2203 return true;
2204
2205 /* If none of the above criteria match, then don't store the key
2206 * persistently */
2207 return false;
2208}
2209
2210static u8 ltk_role(u8 type)
2211{
2212 if (type == SMP_LTK)
2213 return HCI_ROLE_MASTER;
2214
2215 return HCI_ROLE_SLAVE;
2216}
2217
2218struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2219 u8 addr_type, u8 role)
2220{
2221 struct smp_ltk *k;
2222
2223 rcu_read_lock();
2224 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2225 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2226 continue;
2227
2228 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2229 rcu_read_unlock();
2230 return k;
2231 }
2232 }
2233 rcu_read_unlock();
2234
2235 return NULL;
2236}
2237
2238struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2239{
2240 struct smp_irk *irk;
2241
2242 rcu_read_lock();
2243 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2244 if (!bacmp(&irk->rpa, rpa)) {
2245 rcu_read_unlock();
2246 return irk;
2247 }
2248 }
2249
2250 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2251 if (smp_irk_matches(hdev, irk->val, rpa)) {
2252 bacpy(&irk->rpa, rpa);
2253 rcu_read_unlock();
2254 return irk;
2255 }
2256 }
2257 rcu_read_unlock();
2258
2259 return NULL;
2260}
2261
2262struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2263 u8 addr_type)
2264{
2265 struct smp_irk *irk;
2266
2267 /* Identity Address must be public or static random */
2268 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2269 return NULL;
2270
2271 rcu_read_lock();
2272 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2273 if (addr_type == irk->addr_type &&
2274 bacmp(bdaddr, &irk->bdaddr) == 0) {
2275 rcu_read_unlock();
2276 return irk;
2277 }
2278 }
2279 rcu_read_unlock();
2280
2281 return NULL;
2282}
2283
2284struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2285 bdaddr_t *bdaddr, u8 *val, u8 type,
2286 u8 pin_len, bool *persistent)
2287{
2288 struct link_key *key, *old_key;
2289 u8 old_key_type;
2290
2291 old_key = hci_find_link_key(hdev, bdaddr);
2292 if (old_key) {
2293 old_key_type = old_key->type;
2294 key = old_key;
2295 } else {
2296 old_key_type = conn ? conn->key_type : 0xff;
2297 key = kzalloc(sizeof(*key), GFP_KERNEL);
2298 if (!key)
2299 return NULL;
2300 list_add_rcu(&key->list, &hdev->link_keys);
2301 }
2302
2303 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2304
2305 /* Some buggy controller combinations generate a changed
2306 * combination key for legacy pairing even when there's no
2307 * previous key */
2308 if (type == HCI_LK_CHANGED_COMBINATION &&
2309 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2310 type = HCI_LK_COMBINATION;
2311 if (conn)
2312 conn->key_type = type;
2313 }
2314
2315 bacpy(&key->bdaddr, bdaddr);
2316 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2317 key->pin_len = pin_len;
2318
2319 if (type == HCI_LK_CHANGED_COMBINATION)
2320 key->type = old_key_type;
2321 else
2322 key->type = type;
2323
2324 if (persistent)
2325 *persistent = hci_persistent_key(hdev, conn, type,
2326 old_key_type);
2327
2328 return key;
2329}
2330
2331struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2332 u8 addr_type, u8 type, u8 authenticated,
2333 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2334{
2335 struct smp_ltk *key, *old_key;
2336 u8 role = ltk_role(type);
2337
2338 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2339 if (old_key)
2340 key = old_key;
2341 else {
2342 key = kzalloc(sizeof(*key), GFP_KERNEL);
2343 if (!key)
2344 return NULL;
2345 list_add_rcu(&key->list, &hdev->long_term_keys);
2346 }
2347
2348 bacpy(&key->bdaddr, bdaddr);
2349 key->bdaddr_type = addr_type;
2350 memcpy(key->val, tk, sizeof(key->val));
2351 key->authenticated = authenticated;
2352 key->ediv = ediv;
2353 key->rand = rand;
2354 key->enc_size = enc_size;
2355 key->type = type;
2356
2357 return key;
2358}
2359
2360struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2361 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2362{
2363 struct smp_irk *irk;
2364
2365 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2366 if (!irk) {
2367 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2368 if (!irk)
2369 return NULL;
2370
2371 bacpy(&irk->bdaddr, bdaddr);
2372 irk->addr_type = addr_type;
2373
2374 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2375 }
2376
2377 memcpy(irk->val, val, 16);
2378 bacpy(&irk->rpa, rpa);
2379
2380 return irk;
2381}
2382
2383int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2384{
2385 struct link_key *key;
2386
2387 key = hci_find_link_key(hdev, bdaddr);
2388 if (!key)
2389 return -ENOENT;
2390
2391 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2392
2393 list_del_rcu(&key->list);
2394 kfree_rcu(key, rcu);
2395
2396 return 0;
2397}
2398
2399int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2400{
2401 struct smp_ltk *k;
2402 int removed = 0;
2403
2404 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2405 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2406 continue;
2407
2408 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2409
2410 list_del_rcu(&k->list);
2411 kfree_rcu(k, rcu);
2412 removed++;
2413 }
2414
2415 return removed ? 0 : -ENOENT;
2416}
2417
2418void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2419{
2420 struct smp_irk *k;
2421
2422 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2423 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2424 continue;
2425
2426 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2427
2428 list_del_rcu(&k->list);
2429 kfree_rcu(k, rcu);
2430 }
2431}
2432
2433bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2434{
2435 struct smp_ltk *k;
2436 struct smp_irk *irk;
2437 u8 addr_type;
2438
2439 if (type == BDADDR_BREDR) {
2440 if (hci_find_link_key(hdev, bdaddr))
2441 return true;
2442 return false;
2443 }
2444
2445 /* Convert to HCI addr type which struct smp_ltk uses */
2446 if (type == BDADDR_LE_PUBLIC)
2447 addr_type = ADDR_LE_DEV_PUBLIC;
2448 else
2449 addr_type = ADDR_LE_DEV_RANDOM;
2450
2451 irk = hci_get_irk(hdev, bdaddr, addr_type);
2452 if (irk) {
2453 bdaddr = &irk->bdaddr;
2454 addr_type = irk->addr_type;
2455 }
2456
2457 rcu_read_lock();
2458 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2459 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2460 rcu_read_unlock();
2461 return true;
2462 }
2463 }
2464 rcu_read_unlock();
2465
2466 return false;
2467}
2468
2469/* HCI command timer function */
2470static void hci_cmd_timeout(struct work_struct *work)
2471{
2472 struct hci_dev *hdev = container_of(work, struct hci_dev,
2473 cmd_timer.work);
2474
2475 if (hdev->sent_cmd) {
2476 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2477 u16 opcode = __le16_to_cpu(sent->opcode);
2478
2479 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2480 } else {
2481 BT_ERR("%s command tx timeout", hdev->name);
2482 }
2483
2484 atomic_set(&hdev->cmd_cnt, 1);
2485 queue_work(hdev->workqueue, &hdev->cmd_work);
2486}
2487
2488struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2489 bdaddr_t *bdaddr, u8 bdaddr_type)
2490{
2491 struct oob_data *data;
2492
2493 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2494 if (bacmp(bdaddr, &data->bdaddr) != 0)
2495 continue;
2496 if (data->bdaddr_type != bdaddr_type)
2497 continue;
2498 return data;
2499 }
2500
2501 return NULL;
2502}
2503
2504int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2505 u8 bdaddr_type)
2506{
2507 struct oob_data *data;
2508
2509 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2510 if (!data)
2511 return -ENOENT;
2512
2513 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2514
2515 list_del(&data->list);
2516 kfree(data);
2517
2518 return 0;
2519}
2520
2521void hci_remote_oob_data_clear(struct hci_dev *hdev)
2522{
2523 struct oob_data *data, *n;
2524
2525 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2526 list_del(&data->list);
2527 kfree(data);
2528 }
2529}
2530
2531int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2532 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2533 u8 *hash256, u8 *rand256)
2534{
2535 struct oob_data *data;
2536
2537 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2538 if (!data) {
2539 data = kmalloc(sizeof(*data), GFP_KERNEL);
2540 if (!data)
2541 return -ENOMEM;
2542
2543 bacpy(&data->bdaddr, bdaddr);
2544 data->bdaddr_type = bdaddr_type;
2545 list_add(&data->list, &hdev->remote_oob_data);
2546 }
2547
2548 if (hash192 && rand192) {
2549 memcpy(data->hash192, hash192, sizeof(data->hash192));
2550 memcpy(data->rand192, rand192, sizeof(data->rand192));
2551 if (hash256 && rand256)
2552 data->present = 0x03;
2553 } else {
2554 memset(data->hash192, 0, sizeof(data->hash192));
2555 memset(data->rand192, 0, sizeof(data->rand192));
2556 if (hash256 && rand256)
2557 data->present = 0x02;
2558 else
2559 data->present = 0x00;
2560 }
2561
2562 if (hash256 && rand256) {
2563 memcpy(data->hash256, hash256, sizeof(data->hash256));
2564 memcpy(data->rand256, rand256, sizeof(data->rand256));
2565 } else {
2566 memset(data->hash256, 0, sizeof(data->hash256));
2567 memset(data->rand256, 0, sizeof(data->rand256));
2568 if (hash192 && rand192)
2569 data->present = 0x01;
2570 }
2571
2572 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2573
2574 return 0;
2575}
2576
2577/* This function requires the caller holds hdev->lock */
2578struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2579{
2580 struct adv_info *adv_instance;
2581
2582 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2583 if (adv_instance->instance == instance)
2584 return adv_instance;
2585 }
2586
2587 return NULL;
2588}
2589
2590/* This function requires the caller holds hdev->lock */
2591struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2592{
2593 struct adv_info *cur_instance;
2594
2595 cur_instance = hci_find_adv_instance(hdev, instance);
2596 if (!cur_instance)
2597 return NULL;
2598
2599 if (cur_instance == list_last_entry(&hdev->adv_instances,
2600 struct adv_info, list))
2601 return list_first_entry(&hdev->adv_instances,
2602 struct adv_info, list);
2603 else
2604 return list_next_entry(cur_instance, list);
2605}
2606
2607/* This function requires the caller holds hdev->lock */
2608int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2609{
2610 struct adv_info *adv_instance;
2611
2612 adv_instance = hci_find_adv_instance(hdev, instance);
2613 if (!adv_instance)
2614 return -ENOENT;
2615
2616 BT_DBG("%s removing %dMR", hdev->name, instance);
2617
2618 if (hdev->cur_adv_instance == instance) {
2619 if (hdev->adv_instance_timeout) {
2620 cancel_delayed_work(&hdev->adv_instance_expire);
2621 hdev->adv_instance_timeout = 0;
2622 }
2623 hdev->cur_adv_instance = 0x00;
2624 }
2625
2626 list_del(&adv_instance->list);
2627 kfree(adv_instance);
2628
2629 hdev->adv_instance_cnt--;
2630
2631 return 0;
2632}
2633
2634/* This function requires the caller holds hdev->lock */
2635void hci_adv_instances_clear(struct hci_dev *hdev)
2636{
2637 struct adv_info *adv_instance, *n;
2638
2639 if (hdev->adv_instance_timeout) {
2640 cancel_delayed_work(&hdev->adv_instance_expire);
2641 hdev->adv_instance_timeout = 0;
2642 }
2643
2644 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2645 list_del(&adv_instance->list);
2646 kfree(adv_instance);
2647 }
2648
2649 hdev->adv_instance_cnt = 0;
2650 hdev->cur_adv_instance = 0x00;
2651}
2652
2653/* This function requires the caller holds hdev->lock */
2654int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2655 u16 adv_data_len, u8 *adv_data,
2656 u16 scan_rsp_len, u8 *scan_rsp_data,
2657 u16 timeout, u16 duration)
2658{
2659 struct adv_info *adv_instance;
2660
2661 adv_instance = hci_find_adv_instance(hdev, instance);
2662 if (adv_instance) {
2663 memset(adv_instance->adv_data, 0,
2664 sizeof(adv_instance->adv_data));
2665 memset(adv_instance->scan_rsp_data, 0,
2666 sizeof(adv_instance->scan_rsp_data));
2667 } else {
2668 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2669 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2670 return -EOVERFLOW;
2671
2672 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2673 if (!adv_instance)
2674 return -ENOMEM;
2675
2676 adv_instance->pending = true;
2677 adv_instance->instance = instance;
2678 list_add(&adv_instance->list, &hdev->adv_instances);
2679 hdev->adv_instance_cnt++;
2680 }
2681
2682 adv_instance->flags = flags;
2683 adv_instance->adv_data_len = adv_data_len;
2684 adv_instance->scan_rsp_len = scan_rsp_len;
2685
2686 if (adv_data_len)
2687 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2688
2689 if (scan_rsp_len)
2690 memcpy(adv_instance->scan_rsp_data,
2691 scan_rsp_data, scan_rsp_len);
2692
2693 adv_instance->timeout = timeout;
2694 adv_instance->remaining_time = timeout;
2695
2696 if (duration == 0)
2697 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2698 else
2699 adv_instance->duration = duration;
2700
2701 BT_DBG("%s for %dMR", hdev->name, instance);
2702
2703 return 0;
2704}
2705
2706struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2707 bdaddr_t *bdaddr, u8 type)
2708{
2709 struct bdaddr_list *b;
2710
2711 list_for_each_entry(b, bdaddr_list, list) {
2712 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2713 return b;
2714 }
2715
2716 return NULL;
2717}
2718
2719void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2720{
2721 struct bdaddr_list *b, *n;
2722
2723 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2724 list_del(&b->list);
2725 kfree(b);
2726 }
2727}
2728
2729int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2730{
2731 struct bdaddr_list *entry;
2732
2733 if (!bacmp(bdaddr, BDADDR_ANY))
2734 return -EBADF;
2735
2736 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2737 return -EEXIST;
2738
2739 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2740 if (!entry)
2741 return -ENOMEM;
2742
2743 bacpy(&entry->bdaddr, bdaddr);
2744 entry->bdaddr_type = type;
2745
2746 list_add(&entry->list, list);
2747
2748 return 0;
2749}
2750
2751int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2752{
2753 struct bdaddr_list *entry;
2754
2755 if (!bacmp(bdaddr, BDADDR_ANY)) {
2756 hci_bdaddr_list_clear(list);
2757 return 0;
2758 }
2759
2760 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2761 if (!entry)
2762 return -ENOENT;
2763
2764 list_del(&entry->list);
2765 kfree(entry);
2766
2767 return 0;
2768}
2769
2770/* This function requires the caller holds hdev->lock */
2771struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2772 bdaddr_t *addr, u8 addr_type)
2773{
2774 struct hci_conn_params *params;
2775
2776 list_for_each_entry(params, &hdev->le_conn_params, list) {
2777 if (bacmp(¶ms->addr, addr) == 0 &&
2778 params->addr_type == addr_type) {
2779 return params;
2780 }
2781 }
2782
2783 return NULL;
2784}
2785
2786/* This function requires the caller holds hdev->lock */
2787struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2788 bdaddr_t *addr, u8 addr_type)
2789{
2790 struct hci_conn_params *param;
2791
2792 list_for_each_entry(param, list, action) {
2793 if (bacmp(¶m->addr, addr) == 0 &&
2794 param->addr_type == addr_type)
2795 return param;
2796 }
2797
2798 return NULL;
2799}
2800
2801/* This function requires the caller holds hdev->lock */
2802struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2803 bdaddr_t *addr, u8 addr_type)
2804{
2805 struct hci_conn_params *params;
2806
2807 params = hci_conn_params_lookup(hdev, addr, addr_type);
2808 if (params)
2809 return params;
2810
2811 params = kzalloc(sizeof(*params), GFP_KERNEL);
2812 if (!params) {
2813 BT_ERR("Out of memory");
2814 return NULL;
2815 }
2816
2817 bacpy(¶ms->addr, addr);
2818 params->addr_type = addr_type;
2819
2820 list_add(¶ms->list, &hdev->le_conn_params);
2821 INIT_LIST_HEAD(¶ms->action);
2822
2823 params->conn_min_interval = hdev->le_conn_min_interval;
2824 params->conn_max_interval = hdev->le_conn_max_interval;
2825 params->conn_latency = hdev->le_conn_latency;
2826 params->supervision_timeout = hdev->le_supv_timeout;
2827 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2828
2829 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2830
2831 return params;
2832}
2833
2834static void hci_conn_params_free(struct hci_conn_params *params)
2835{
2836 if (params->conn) {
2837 hci_conn_drop(params->conn);
2838 hci_conn_put(params->conn);
2839 }
2840
2841 list_del(¶ms->action);
2842 list_del(¶ms->list);
2843 kfree(params);
2844}
2845
2846/* This function requires the caller holds hdev->lock */
2847void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2848{
2849 struct hci_conn_params *params;
2850
2851 params = hci_conn_params_lookup(hdev, addr, addr_type);
2852 if (!params)
2853 return;
2854
2855 hci_conn_params_free(params);
2856
2857 hci_update_background_scan(hdev);
2858
2859 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2860}
2861
2862/* This function requires the caller holds hdev->lock */
2863void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2864{
2865 struct hci_conn_params *params, *tmp;
2866
2867 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2868 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2869 continue;
2870
2871 /* If trying to estabilish one time connection to disabled
2872 * device, leave the params, but mark them as just once.
2873 */
2874 if (params->explicit_connect) {
2875 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2876 continue;
2877 }
2878
2879 list_del(¶ms->list);
2880 kfree(params);
2881 }
2882
2883 BT_DBG("All LE disabled connection parameters were removed");
2884}
2885
2886/* This function requires the caller holds hdev->lock */
2887static void hci_conn_params_clear_all(struct hci_dev *hdev)
2888{
2889 struct hci_conn_params *params, *tmp;
2890
2891 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2892 hci_conn_params_free(params);
2893
2894 BT_DBG("All LE connection parameters were removed");
2895}
2896
2897/* Copy the Identity Address of the controller.
2898 *
2899 * If the controller has a public BD_ADDR, then by default use that one.
2900 * If this is a LE only controller without a public address, default to
2901 * the static random address.
2902 *
2903 * For debugging purposes it is possible to force controllers with a
2904 * public address to use the static random address instead.
2905 *
2906 * In case BR/EDR has been disabled on a dual-mode controller and
2907 * userspace has configured a static address, then that address
2908 * becomes the identity address instead of the public BR/EDR address.
2909 */
2910void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2911 u8 *bdaddr_type)
2912{
2913 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2914 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2915 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2916 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2917 bacpy(bdaddr, &hdev->static_addr);
2918 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2919 } else {
2920 bacpy(bdaddr, &hdev->bdaddr);
2921 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2922 }
2923}
2924
2925/* Alloc HCI device */
2926struct hci_dev *hci_alloc_dev(void)
2927{
2928 struct hci_dev *hdev;
2929
2930 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
2931 if (!hdev)
2932 return NULL;
2933
2934 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2935 hdev->esco_type = (ESCO_HV1);
2936 hdev->link_mode = (HCI_LM_ACCEPT);
2937 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2938 hdev->io_capability = 0x03; /* No Input No Output */
2939 hdev->manufacturer = 0xffff; /* Default to internal use */
2940 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2941 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2942 hdev->adv_instance_cnt = 0;
2943 hdev->cur_adv_instance = 0x00;
2944 hdev->adv_instance_timeout = 0;
2945
2946 hdev->sniff_max_interval = 800;
2947 hdev->sniff_min_interval = 80;
2948
2949 hdev->le_adv_channel_map = 0x07;
2950 hdev->le_adv_min_interval = 0x0800;
2951 hdev->le_adv_max_interval = 0x0800;
2952 hdev->le_scan_interval = 0x0060;
2953 hdev->le_scan_window = 0x0030;
2954 hdev->le_conn_min_interval = 0x0028;
2955 hdev->le_conn_max_interval = 0x0038;
2956 hdev->le_conn_latency = 0x0000;
2957 hdev->le_supv_timeout = 0x002a;
2958 hdev->le_def_tx_len = 0x001b;
2959 hdev->le_def_tx_time = 0x0148;
2960 hdev->le_max_tx_len = 0x001b;
2961 hdev->le_max_tx_time = 0x0148;
2962 hdev->le_max_rx_len = 0x001b;
2963 hdev->le_max_rx_time = 0x0148;
2964
2965 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2966 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2967 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2968 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2969
2970 mutex_init(&hdev->lock);
2971 mutex_init(&hdev->req_lock);
2972
2973 INIT_LIST_HEAD(&hdev->mgmt_pending);
2974 INIT_LIST_HEAD(&hdev->blacklist);
2975 INIT_LIST_HEAD(&hdev->whitelist);
2976 INIT_LIST_HEAD(&hdev->uuids);
2977 INIT_LIST_HEAD(&hdev->link_keys);
2978 INIT_LIST_HEAD(&hdev->long_term_keys);
2979 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2980 INIT_LIST_HEAD(&hdev->remote_oob_data);
2981 INIT_LIST_HEAD(&hdev->le_white_list);
2982 INIT_LIST_HEAD(&hdev->le_conn_params);
2983 INIT_LIST_HEAD(&hdev->pend_le_conns);
2984 INIT_LIST_HEAD(&hdev->pend_le_reports);
2985 INIT_LIST_HEAD(&hdev->conn_hash.list);
2986 INIT_LIST_HEAD(&hdev->adv_instances);
2987
2988 INIT_WORK(&hdev->rx_work, hci_rx_work);
2989 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2990 INIT_WORK(&hdev->tx_work, hci_tx_work);
2991 INIT_WORK(&hdev->power_on, hci_power_on);
2992 INIT_WORK(&hdev->error_reset, hci_error_reset);
2993
2994 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2995
2996 skb_queue_head_init(&hdev->rx_q);
2997 skb_queue_head_init(&hdev->cmd_q);
2998 skb_queue_head_init(&hdev->raw_q);
2999
3000 init_waitqueue_head(&hdev->req_wait_q);
3001
3002 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3003
3004 hci_request_setup(hdev);
3005
3006 hci_init_sysfs(hdev);
3007 discovery_init(hdev);
3008
3009 return hdev;
3010}
3011EXPORT_SYMBOL(hci_alloc_dev);
3012
3013/* Free HCI device */
3014void hci_free_dev(struct hci_dev *hdev)
3015{
3016 /* will free via device release */
3017 put_device(&hdev->dev);
3018}
3019EXPORT_SYMBOL(hci_free_dev);
3020
3021/* Register HCI device */
3022int hci_register_dev(struct hci_dev *hdev)
3023{
3024 int id, error;
3025
3026 if (!hdev->open || !hdev->close || !hdev->send)
3027 return -EINVAL;
3028
3029 /* Do not allow HCI_AMP devices to register at index 0,
3030 * so the index can be used as the AMP controller ID.
3031 */
3032 switch (hdev->dev_type) {
3033 case HCI_BREDR:
3034 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3035 break;
3036 case HCI_AMP:
3037 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3038 break;
3039 default:
3040 return -EINVAL;
3041 }
3042
3043 if (id < 0)
3044 return id;
3045
3046 sprintf(hdev->name, "hci%d", id);
3047 hdev->id = id;
3048
3049 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3050
3051 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3052 WQ_MEM_RECLAIM, 1, hdev->name);
3053 if (!hdev->workqueue) {
3054 error = -ENOMEM;
3055 goto err;
3056 }
3057
3058 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3059 WQ_MEM_RECLAIM, 1, hdev->name);
3060 if (!hdev->req_workqueue) {
3061 destroy_workqueue(hdev->workqueue);
3062 error = -ENOMEM;
3063 goto err;
3064 }
3065
3066 if (!IS_ERR_OR_NULL(bt_debugfs))
3067 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3068
3069 dev_set_name(&hdev->dev, "%s", hdev->name);
3070
3071 error = device_add(&hdev->dev);
3072 if (error < 0)
3073 goto err_wqueue;
3074
3075 hci_leds_init(hdev);
3076
3077 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3078 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3079 hdev);
3080 if (hdev->rfkill) {
3081 if (rfkill_register(hdev->rfkill) < 0) {
3082 rfkill_destroy(hdev->rfkill);
3083 hdev->rfkill = NULL;
3084 }
3085 }
3086
3087 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3088 hci_dev_set_flag(hdev, HCI_RFKILLED);
3089
3090 hci_dev_set_flag(hdev, HCI_SETUP);
3091 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3092
3093 if (hdev->dev_type == HCI_BREDR) {
3094 /* Assume BR/EDR support until proven otherwise (such as
3095 * through reading supported features during init.
3096 */
3097 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3098 }
3099
3100 write_lock(&hci_dev_list_lock);
3101 list_add(&hdev->list, &hci_dev_list);
3102 write_unlock(&hci_dev_list_lock);
3103
3104 /* Devices that are marked for raw-only usage are unconfigured
3105 * and should not be included in normal operation.
3106 */
3107 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3108 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3109
3110 hci_sock_dev_event(hdev, HCI_DEV_REG);
3111 hci_dev_hold(hdev);
3112
3113 queue_work(hdev->req_workqueue, &hdev->power_on);
3114
3115 return id;
3116
3117err_wqueue:
3118 destroy_workqueue(hdev->workqueue);
3119 destroy_workqueue(hdev->req_workqueue);
3120err:
3121 ida_simple_remove(&hci_index_ida, hdev->id);
3122
3123 return error;
3124}
3125EXPORT_SYMBOL(hci_register_dev);
3126
3127/* Unregister HCI device */
3128void hci_unregister_dev(struct hci_dev *hdev)
3129{
3130 int id;
3131
3132 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3133
3134 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3135
3136 id = hdev->id;
3137
3138 write_lock(&hci_dev_list_lock);
3139 list_del(&hdev->list);
3140 write_unlock(&hci_dev_list_lock);
3141
3142 hci_dev_do_close(hdev);
3143
3144 cancel_work_sync(&hdev->power_on);
3145
3146 if (!test_bit(HCI_INIT, &hdev->flags) &&
3147 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3148 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3149 hci_dev_lock(hdev);
3150 mgmt_index_removed(hdev);
3151 hci_dev_unlock(hdev);
3152 }
3153
3154 /* mgmt_index_removed should take care of emptying the
3155 * pending list */
3156 BUG_ON(!list_empty(&hdev->mgmt_pending));
3157
3158 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3159
3160 if (hdev->rfkill) {
3161 rfkill_unregister(hdev->rfkill);
3162 rfkill_destroy(hdev->rfkill);
3163 }
3164
3165 device_del(&hdev->dev);
3166
3167 debugfs_remove_recursive(hdev->debugfs);
3168
3169 destroy_workqueue(hdev->workqueue);
3170 destroy_workqueue(hdev->req_workqueue);
3171
3172 hci_dev_lock(hdev);
3173 hci_bdaddr_list_clear(&hdev->blacklist);
3174 hci_bdaddr_list_clear(&hdev->whitelist);
3175 hci_uuids_clear(hdev);
3176 hci_link_keys_clear(hdev);
3177 hci_smp_ltks_clear(hdev);
3178 hci_smp_irks_clear(hdev);
3179 hci_remote_oob_data_clear(hdev);
3180 hci_adv_instances_clear(hdev);
3181 hci_bdaddr_list_clear(&hdev->le_white_list);
3182 hci_conn_params_clear_all(hdev);
3183 hci_discovery_filter_clear(hdev);
3184 hci_dev_unlock(hdev);
3185
3186 hci_dev_put(hdev);
3187
3188 ida_simple_remove(&hci_index_ida, id);
3189}
3190EXPORT_SYMBOL(hci_unregister_dev);
3191
3192/* Suspend HCI device */
3193int hci_suspend_dev(struct hci_dev *hdev)
3194{
3195 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3196 return 0;
3197}
3198EXPORT_SYMBOL(hci_suspend_dev);
3199
3200/* Resume HCI device */
3201int hci_resume_dev(struct hci_dev *hdev)
3202{
3203 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3204 return 0;
3205}
3206EXPORT_SYMBOL(hci_resume_dev);
3207
3208/* Reset HCI device */
3209int hci_reset_dev(struct hci_dev *hdev)
3210{
3211 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3212 struct sk_buff *skb;
3213
3214 skb = bt_skb_alloc(3, GFP_ATOMIC);
3215 if (!skb)
3216 return -ENOMEM;
3217
3218 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3219 memcpy(skb_put(skb, 3), hw_err, 3);
3220
3221 /* Send Hardware Error to upper stack */
3222 return hci_recv_frame(hdev, skb);
3223}
3224EXPORT_SYMBOL(hci_reset_dev);
3225
3226/* Receive frame from HCI drivers */
3227int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3228{
3229 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3230 && !test_bit(HCI_INIT, &hdev->flags))) {
3231 kfree_skb(skb);
3232 return -ENXIO;
3233 }
3234
3235 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3236 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3237 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
3238 kfree_skb(skb);
3239 return -EINVAL;
3240 }
3241
3242 /* Incoming skb */
3243 bt_cb(skb)->incoming = 1;
3244
3245 /* Time stamp */
3246 __net_timestamp(skb);
3247
3248 skb_queue_tail(&hdev->rx_q, skb);
3249 queue_work(hdev->workqueue, &hdev->rx_work);
3250
3251 return 0;
3252}
3253EXPORT_SYMBOL(hci_recv_frame);
3254
3255/* Receive diagnostic message from HCI drivers */
3256int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3257{
3258 /* Mark as diagnostic packet */
3259 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3260
3261 /* Time stamp */
3262 __net_timestamp(skb);
3263
3264 skb_queue_tail(&hdev->rx_q, skb);
3265 queue_work(hdev->workqueue, &hdev->rx_work);
3266
3267 return 0;
3268}
3269EXPORT_SYMBOL(hci_recv_diag);
3270
3271/* ---- Interface to upper protocols ---- */
3272
3273int hci_register_cb(struct hci_cb *cb)
3274{
3275 BT_DBG("%p name %s", cb, cb->name);
3276
3277 mutex_lock(&hci_cb_list_lock);
3278 list_add_tail(&cb->list, &hci_cb_list);
3279 mutex_unlock(&hci_cb_list_lock);
3280
3281 return 0;
3282}
3283EXPORT_SYMBOL(hci_register_cb);
3284
3285int hci_unregister_cb(struct hci_cb *cb)
3286{
3287 BT_DBG("%p name %s", cb, cb->name);
3288
3289 mutex_lock(&hci_cb_list_lock);
3290 list_del(&cb->list);
3291 mutex_unlock(&hci_cb_list_lock);
3292
3293 return 0;
3294}
3295EXPORT_SYMBOL(hci_unregister_cb);
3296
3297static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3298{
3299 int err;
3300
3301 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3302 skb->len);
3303
3304 /* Time stamp */
3305 __net_timestamp(skb);
3306
3307 /* Send copy to monitor */
3308 hci_send_to_monitor(hdev, skb);
3309
3310 if (atomic_read(&hdev->promisc)) {
3311 /* Send copy to the sockets */
3312 hci_send_to_sock(hdev, skb);
3313 }
3314
3315 /* Get rid of skb owner, prior to sending to the driver. */
3316 skb_orphan(skb);
3317
3318 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3319 kfree_skb(skb);
3320 return;
3321 }
3322
3323 err = hdev->send(hdev, skb);
3324 if (err < 0) {
3325 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3326 kfree_skb(skb);
3327 }
3328}
3329
3330/* Send HCI command */
3331int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3332 const void *param)
3333{
3334 struct sk_buff *skb;
3335
3336 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3337
3338 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3339 if (!skb) {
3340 BT_ERR("%s no memory for command", hdev->name);
3341 return -ENOMEM;
3342 }
3343
3344 /* Stand-alone HCI commands must be flagged as
3345 * single-command requests.
3346 */
3347 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3348
3349 skb_queue_tail(&hdev->cmd_q, skb);
3350 queue_work(hdev->workqueue, &hdev->cmd_work);
3351
3352 return 0;
3353}
3354
3355/* Get data from the previously sent command */
3356void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3357{
3358 struct hci_command_hdr *hdr;
3359
3360 if (!hdev->sent_cmd)
3361 return NULL;
3362
3363 hdr = (void *) hdev->sent_cmd->data;
3364
3365 if (hdr->opcode != cpu_to_le16(opcode))
3366 return NULL;
3367
3368 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3369
3370 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3371}
3372
3373/* Send HCI command and wait for command commplete event */
3374struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3375 const void *param, u32 timeout)
3376{
3377 struct sk_buff *skb;
3378
3379 if (!test_bit(HCI_UP, &hdev->flags))
3380 return ERR_PTR(-ENETDOWN);
3381
3382 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3383
3384 hci_req_sync_lock(hdev);
3385 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3386 hci_req_sync_unlock(hdev);
3387
3388 return skb;
3389}
3390EXPORT_SYMBOL(hci_cmd_sync);
3391
3392/* Send ACL data */
3393static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3394{
3395 struct hci_acl_hdr *hdr;
3396 int len = skb->len;
3397
3398 skb_push(skb, HCI_ACL_HDR_SIZE);
3399 skb_reset_transport_header(skb);
3400 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3401 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3402 hdr->dlen = cpu_to_le16(len);
3403}
3404
3405static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3406 struct sk_buff *skb, __u16 flags)
3407{
3408 struct hci_conn *conn = chan->conn;
3409 struct hci_dev *hdev = conn->hdev;
3410 struct sk_buff *list;
3411
3412 skb->len = skb_headlen(skb);
3413 skb->data_len = 0;
3414
3415 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3416
3417 switch (hdev->dev_type) {
3418 case HCI_BREDR:
3419 hci_add_acl_hdr(skb, conn->handle, flags);
3420 break;
3421 case HCI_AMP:
3422 hci_add_acl_hdr(skb, chan->handle, flags);
3423 break;
3424 default:
3425 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3426 return;
3427 }
3428
3429 list = skb_shinfo(skb)->frag_list;
3430 if (!list) {
3431 /* Non fragmented */
3432 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3433
3434 skb_queue_tail(queue, skb);
3435 } else {
3436 /* Fragmented */
3437 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3438
3439 skb_shinfo(skb)->frag_list = NULL;
3440
3441 /* Queue all fragments atomically. We need to use spin_lock_bh
3442 * here because of 6LoWPAN links, as there this function is
3443 * called from softirq and using normal spin lock could cause
3444 * deadlocks.
3445 */
3446 spin_lock_bh(&queue->lock);
3447
3448 __skb_queue_tail(queue, skb);
3449
3450 flags &= ~ACL_START;
3451 flags |= ACL_CONT;
3452 do {
3453 skb = list; list = list->next;
3454
3455 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3456 hci_add_acl_hdr(skb, conn->handle, flags);
3457
3458 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3459
3460 __skb_queue_tail(queue, skb);
3461 } while (list);
3462
3463 spin_unlock_bh(&queue->lock);
3464 }
3465}
3466
3467void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3468{
3469 struct hci_dev *hdev = chan->conn->hdev;
3470
3471 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3472
3473 hci_queue_acl(chan, &chan->data_q, skb, flags);
3474
3475 queue_work(hdev->workqueue, &hdev->tx_work);
3476}
3477
3478/* Send SCO data */
3479void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3480{
3481 struct hci_dev *hdev = conn->hdev;
3482 struct hci_sco_hdr hdr;
3483
3484 BT_DBG("%s len %d", hdev->name, skb->len);
3485
3486 hdr.handle = cpu_to_le16(conn->handle);
3487 hdr.dlen = skb->len;
3488
3489 skb_push(skb, HCI_SCO_HDR_SIZE);
3490 skb_reset_transport_header(skb);
3491 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3492
3493 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3494
3495 skb_queue_tail(&conn->data_q, skb);
3496 queue_work(hdev->workqueue, &hdev->tx_work);
3497}
3498
3499/* ---- HCI TX task (outgoing data) ---- */
3500
3501/* HCI Connection scheduler */
3502static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3503 int *quote)
3504{
3505 struct hci_conn_hash *h = &hdev->conn_hash;
3506 struct hci_conn *conn = NULL, *c;
3507 unsigned int num = 0, min = ~0;
3508
3509 /* We don't have to lock device here. Connections are always
3510 * added and removed with TX task disabled. */
3511
3512 rcu_read_lock();
3513
3514 list_for_each_entry_rcu(c, &h->list, list) {
3515 if (c->type != type || skb_queue_empty(&c->data_q))
3516 continue;
3517
3518 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3519 continue;
3520
3521 num++;
3522
3523 if (c->sent < min) {
3524 min = c->sent;
3525 conn = c;
3526 }
3527
3528 if (hci_conn_num(hdev, type) == num)
3529 break;
3530 }
3531
3532 rcu_read_unlock();
3533
3534 if (conn) {
3535 int cnt, q;
3536
3537 switch (conn->type) {
3538 case ACL_LINK:
3539 cnt = hdev->acl_cnt;
3540 break;
3541 case SCO_LINK:
3542 case ESCO_LINK:
3543 cnt = hdev->sco_cnt;
3544 break;
3545 case LE_LINK:
3546 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3547 break;
3548 default:
3549 cnt = 0;
3550 BT_ERR("Unknown link type");
3551 }
3552
3553 q = cnt / num;
3554 *quote = q ? q : 1;
3555 } else
3556 *quote = 0;
3557
3558 BT_DBG("conn %p quote %d", conn, *quote);
3559 return conn;
3560}
3561
3562static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3563{
3564 struct hci_conn_hash *h = &hdev->conn_hash;
3565 struct hci_conn *c;
3566
3567 BT_ERR("%s link tx timeout", hdev->name);
3568
3569 rcu_read_lock();
3570
3571 /* Kill stalled connections */
3572 list_for_each_entry_rcu(c, &h->list, list) {
3573 if (c->type == type && c->sent) {
3574 BT_ERR("%s killing stalled connection %pMR",
3575 hdev->name, &c->dst);
3576 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3577 }
3578 }
3579
3580 rcu_read_unlock();
3581}
3582
3583static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3584 int *quote)
3585{
3586 struct hci_conn_hash *h = &hdev->conn_hash;
3587 struct hci_chan *chan = NULL;
3588 unsigned int num = 0, min = ~0, cur_prio = 0;
3589 struct hci_conn *conn;
3590 int cnt, q, conn_num = 0;
3591
3592 BT_DBG("%s", hdev->name);
3593
3594 rcu_read_lock();
3595
3596 list_for_each_entry_rcu(conn, &h->list, list) {
3597 struct hci_chan *tmp;
3598
3599 if (conn->type != type)
3600 continue;
3601
3602 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3603 continue;
3604
3605 conn_num++;
3606
3607 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3608 struct sk_buff *skb;
3609
3610 if (skb_queue_empty(&tmp->data_q))
3611 continue;
3612
3613 skb = skb_peek(&tmp->data_q);
3614 if (skb->priority < cur_prio)
3615 continue;
3616
3617 if (skb->priority > cur_prio) {
3618 num = 0;
3619 min = ~0;
3620 cur_prio = skb->priority;
3621 }
3622
3623 num++;
3624
3625 if (conn->sent < min) {
3626 min = conn->sent;
3627 chan = tmp;
3628 }
3629 }
3630
3631 if (hci_conn_num(hdev, type) == conn_num)
3632 break;
3633 }
3634
3635 rcu_read_unlock();
3636
3637 if (!chan)
3638 return NULL;
3639
3640 switch (chan->conn->type) {
3641 case ACL_LINK:
3642 cnt = hdev->acl_cnt;
3643 break;
3644 case AMP_LINK:
3645 cnt = hdev->block_cnt;
3646 break;
3647 case SCO_LINK:
3648 case ESCO_LINK:
3649 cnt = hdev->sco_cnt;
3650 break;
3651 case LE_LINK:
3652 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3653 break;
3654 default:
3655 cnt = 0;
3656 BT_ERR("Unknown link type");
3657 }
3658
3659 q = cnt / num;
3660 *quote = q ? q : 1;
3661 BT_DBG("chan %p quote %d", chan, *quote);
3662 return chan;
3663}
3664
3665static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3666{
3667 struct hci_conn_hash *h = &hdev->conn_hash;
3668 struct hci_conn *conn;
3669 int num = 0;
3670
3671 BT_DBG("%s", hdev->name);
3672
3673 rcu_read_lock();
3674
3675 list_for_each_entry_rcu(conn, &h->list, list) {
3676 struct hci_chan *chan;
3677
3678 if (conn->type != type)
3679 continue;
3680
3681 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3682 continue;
3683
3684 num++;
3685
3686 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3687 struct sk_buff *skb;
3688
3689 if (chan->sent) {
3690 chan->sent = 0;
3691 continue;
3692 }
3693
3694 if (skb_queue_empty(&chan->data_q))
3695 continue;
3696
3697 skb = skb_peek(&chan->data_q);
3698 if (skb->priority >= HCI_PRIO_MAX - 1)
3699 continue;
3700
3701 skb->priority = HCI_PRIO_MAX - 1;
3702
3703 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3704 skb->priority);
3705 }
3706
3707 if (hci_conn_num(hdev, type) == num)
3708 break;
3709 }
3710
3711 rcu_read_unlock();
3712
3713}
3714
3715static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3716{
3717 /* Calculate count of blocks used by this packet */
3718 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3719}
3720
3721static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3722{
3723 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3724 /* ACL tx timeout must be longer than maximum
3725 * link supervision timeout (40.9 seconds) */
3726 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3727 HCI_ACL_TX_TIMEOUT))
3728 hci_link_tx_to(hdev, ACL_LINK);
3729 }
3730}
3731
3732static void hci_sched_acl_pkt(struct hci_dev *hdev)
3733{
3734 unsigned int cnt = hdev->acl_cnt;
3735 struct hci_chan *chan;
3736 struct sk_buff *skb;
3737 int quote;
3738
3739 __check_timeout(hdev, cnt);
3740
3741 while (hdev->acl_cnt &&
3742 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3743 u32 priority = (skb_peek(&chan->data_q))->priority;
3744 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3745 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3746 skb->len, skb->priority);
3747
3748 /* Stop if priority has changed */
3749 if (skb->priority < priority)
3750 break;
3751
3752 skb = skb_dequeue(&chan->data_q);
3753
3754 hci_conn_enter_active_mode(chan->conn,
3755 bt_cb(skb)->force_active);
3756
3757 hci_send_frame(hdev, skb);
3758 hdev->acl_last_tx = jiffies;
3759
3760 hdev->acl_cnt--;
3761 chan->sent++;
3762 chan->conn->sent++;
3763 }
3764 }
3765
3766 if (cnt != hdev->acl_cnt)
3767 hci_prio_recalculate(hdev, ACL_LINK);
3768}
3769
3770static void hci_sched_acl_blk(struct hci_dev *hdev)
3771{
3772 unsigned int cnt = hdev->block_cnt;
3773 struct hci_chan *chan;
3774 struct sk_buff *skb;
3775 int quote;
3776 u8 type;
3777
3778 __check_timeout(hdev, cnt);
3779
3780 BT_DBG("%s", hdev->name);
3781
3782 if (hdev->dev_type == HCI_AMP)
3783 type = AMP_LINK;
3784 else
3785 type = ACL_LINK;
3786
3787 while (hdev->block_cnt > 0 &&
3788 (chan = hci_chan_sent(hdev, type, "e))) {
3789 u32 priority = (skb_peek(&chan->data_q))->priority;
3790 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3791 int blocks;
3792
3793 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3794 skb->len, skb->priority);
3795
3796 /* Stop if priority has changed */
3797 if (skb->priority < priority)
3798 break;
3799
3800 skb = skb_dequeue(&chan->data_q);
3801
3802 blocks = __get_blocks(hdev, skb);
3803 if (blocks > hdev->block_cnt)
3804 return;
3805
3806 hci_conn_enter_active_mode(chan->conn,
3807 bt_cb(skb)->force_active);
3808
3809 hci_send_frame(hdev, skb);
3810 hdev->acl_last_tx = jiffies;
3811
3812 hdev->block_cnt -= blocks;
3813 quote -= blocks;
3814
3815 chan->sent += blocks;
3816 chan->conn->sent += blocks;
3817 }
3818 }
3819
3820 if (cnt != hdev->block_cnt)
3821 hci_prio_recalculate(hdev, type);
3822}
3823
3824static void hci_sched_acl(struct hci_dev *hdev)
3825{
3826 BT_DBG("%s", hdev->name);
3827
3828 /* No ACL link over BR/EDR controller */
3829 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3830 return;
3831
3832 /* No AMP link over AMP controller */
3833 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3834 return;
3835
3836 switch (hdev->flow_ctl_mode) {
3837 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3838 hci_sched_acl_pkt(hdev);
3839 break;
3840
3841 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3842 hci_sched_acl_blk(hdev);
3843 break;
3844 }
3845}
3846
3847/* Schedule SCO */
3848static void hci_sched_sco(struct hci_dev *hdev)
3849{
3850 struct hci_conn *conn;
3851 struct sk_buff *skb;
3852 int quote;
3853
3854 BT_DBG("%s", hdev->name);
3855
3856 if (!hci_conn_num(hdev, SCO_LINK))
3857 return;
3858
3859 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3860 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3861 BT_DBG("skb %p len %d", skb, skb->len);
3862 hci_send_frame(hdev, skb);
3863
3864 conn->sent++;
3865 if (conn->sent == ~0)
3866 conn->sent = 0;
3867 }
3868 }
3869}
3870
3871static void hci_sched_esco(struct hci_dev *hdev)
3872{
3873 struct hci_conn *conn;
3874 struct sk_buff *skb;
3875 int quote;
3876
3877 BT_DBG("%s", hdev->name);
3878
3879 if (!hci_conn_num(hdev, ESCO_LINK))
3880 return;
3881
3882 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3883 "e))) {
3884 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3885 BT_DBG("skb %p len %d", skb, skb->len);
3886 hci_send_frame(hdev, skb);
3887
3888 conn->sent++;
3889 if (conn->sent == ~0)
3890 conn->sent = 0;
3891 }
3892 }
3893}
3894
3895static void hci_sched_le(struct hci_dev *hdev)
3896{
3897 struct hci_chan *chan;
3898 struct sk_buff *skb;
3899 int quote, cnt, tmp;
3900
3901 BT_DBG("%s", hdev->name);
3902
3903 if (!hci_conn_num(hdev, LE_LINK))
3904 return;
3905
3906 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3907 /* LE tx timeout must be longer than maximum
3908 * link supervision timeout (40.9 seconds) */
3909 if (!hdev->le_cnt && hdev->le_pkts &&
3910 time_after(jiffies, hdev->le_last_tx + HZ * 45))
3911 hci_link_tx_to(hdev, LE_LINK);
3912 }
3913
3914 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3915 tmp = cnt;
3916 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3917 u32 priority = (skb_peek(&chan->data_q))->priority;
3918 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3919 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3920 skb->len, skb->priority);
3921
3922 /* Stop if priority has changed */
3923 if (skb->priority < priority)
3924 break;
3925
3926 skb = skb_dequeue(&chan->data_q);
3927
3928 hci_send_frame(hdev, skb);
3929 hdev->le_last_tx = jiffies;
3930
3931 cnt--;
3932 chan->sent++;
3933 chan->conn->sent++;
3934 }
3935 }
3936
3937 if (hdev->le_pkts)
3938 hdev->le_cnt = cnt;
3939 else
3940 hdev->acl_cnt = cnt;
3941
3942 if (cnt != tmp)
3943 hci_prio_recalculate(hdev, LE_LINK);
3944}
3945
3946static void hci_tx_work(struct work_struct *work)
3947{
3948 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3949 struct sk_buff *skb;
3950
3951 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
3952 hdev->sco_cnt, hdev->le_cnt);
3953
3954 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3955 /* Schedule queues and send stuff to HCI driver */
3956 hci_sched_acl(hdev);
3957 hci_sched_sco(hdev);
3958 hci_sched_esco(hdev);
3959 hci_sched_le(hdev);
3960 }
3961
3962 /* Send next queued raw (unknown type) packet */
3963 while ((skb = skb_dequeue(&hdev->raw_q)))
3964 hci_send_frame(hdev, skb);
3965}
3966
3967/* ----- HCI RX task (incoming data processing) ----- */
3968
3969/* ACL data packet */
3970static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3971{
3972 struct hci_acl_hdr *hdr = (void *) skb->data;
3973 struct hci_conn *conn;
3974 __u16 handle, flags;
3975
3976 skb_pull(skb, HCI_ACL_HDR_SIZE);
3977
3978 handle = __le16_to_cpu(hdr->handle);
3979 flags = hci_flags(handle);
3980 handle = hci_handle(handle);
3981
3982 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3983 handle, flags);
3984
3985 hdev->stat.acl_rx++;
3986
3987 hci_dev_lock(hdev);
3988 conn = hci_conn_hash_lookup_handle(hdev, handle);
3989 hci_dev_unlock(hdev);
3990
3991 if (conn) {
3992 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3993
3994 /* Send to upper protocol */
3995 l2cap_recv_acldata(conn, skb, flags);
3996 return;
3997 } else {
3998 BT_ERR("%s ACL packet for unknown connection handle %d",
3999 hdev->name, handle);
4000 }
4001
4002 kfree_skb(skb);
4003}
4004
4005/* SCO data packet */
4006static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4007{
4008 struct hci_sco_hdr *hdr = (void *) skb->data;
4009 struct hci_conn *conn;
4010 __u16 handle;
4011
4012 skb_pull(skb, HCI_SCO_HDR_SIZE);
4013
4014 handle = __le16_to_cpu(hdr->handle);
4015
4016 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4017
4018 hdev->stat.sco_rx++;
4019
4020 hci_dev_lock(hdev);
4021 conn = hci_conn_hash_lookup_handle(hdev, handle);
4022 hci_dev_unlock(hdev);
4023
4024 if (conn) {
4025 /* Send to upper protocol */
4026 sco_recv_scodata(conn, skb);
4027 return;
4028 } else {
4029 BT_ERR("%s SCO packet for unknown connection handle %d",
4030 hdev->name, handle);
4031 }
4032
4033 kfree_skb(skb);
4034}
4035
4036static bool hci_req_is_complete(struct hci_dev *hdev)
4037{
4038 struct sk_buff *skb;
4039
4040 skb = skb_peek(&hdev->cmd_q);
4041 if (!skb)
4042 return true;
4043
4044 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4045}
4046
4047static void hci_resend_last(struct hci_dev *hdev)
4048{
4049 struct hci_command_hdr *sent;
4050 struct sk_buff *skb;
4051 u16 opcode;
4052
4053 if (!hdev->sent_cmd)
4054 return;
4055
4056 sent = (void *) hdev->sent_cmd->data;
4057 opcode = __le16_to_cpu(sent->opcode);
4058 if (opcode == HCI_OP_RESET)
4059 return;
4060
4061 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4062 if (!skb)
4063 return;
4064
4065 skb_queue_head(&hdev->cmd_q, skb);
4066 queue_work(hdev->workqueue, &hdev->cmd_work);
4067}
4068
4069void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4070 hci_req_complete_t *req_complete,
4071 hci_req_complete_skb_t *req_complete_skb)
4072{
4073 struct sk_buff *skb;
4074 unsigned long flags;
4075
4076 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4077
4078 /* If the completed command doesn't match the last one that was
4079 * sent we need to do special handling of it.
4080 */
4081 if (!hci_sent_cmd_data(hdev, opcode)) {
4082 /* Some CSR based controllers generate a spontaneous
4083 * reset complete event during init and any pending
4084 * command will never be completed. In such a case we
4085 * need to resend whatever was the last sent
4086 * command.
4087 */
4088 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4089 hci_resend_last(hdev);
4090
4091 return;
4092 }
4093
4094 /* If the command succeeded and there's still more commands in
4095 * this request the request is not yet complete.
4096 */
4097 if (!status && !hci_req_is_complete(hdev))
4098 return;
4099
4100 /* If this was the last command in a request the complete
4101 * callback would be found in hdev->sent_cmd instead of the
4102 * command queue (hdev->cmd_q).
4103 */
4104 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4105 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4106 return;
4107 }
4108
4109 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4110 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4111 return;
4112 }
4113
4114 /* Remove all pending commands belonging to this request */
4115 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4116 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4117 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4118 __skb_queue_head(&hdev->cmd_q, skb);
4119 break;
4120 }
4121
4122 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4123 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4124 else
4125 *req_complete = bt_cb(skb)->hci.req_complete;
4126 kfree_skb(skb);
4127 }
4128 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4129}
4130
4131static void hci_rx_work(struct work_struct *work)
4132{
4133 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4134 struct sk_buff *skb;
4135
4136 BT_DBG("%s", hdev->name);
4137
4138 while ((skb = skb_dequeue(&hdev->rx_q))) {
4139 /* Send copy to monitor */
4140 hci_send_to_monitor(hdev, skb);
4141
4142 if (atomic_read(&hdev->promisc)) {
4143 /* Send copy to the sockets */
4144 hci_send_to_sock(hdev, skb);
4145 }
4146
4147 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4148 kfree_skb(skb);
4149 continue;
4150 }
4151
4152 if (test_bit(HCI_INIT, &hdev->flags)) {
4153 /* Don't process data packets in this states. */
4154 switch (hci_skb_pkt_type(skb)) {
4155 case HCI_ACLDATA_PKT:
4156 case HCI_SCODATA_PKT:
4157 kfree_skb(skb);
4158 continue;
4159 }
4160 }
4161
4162 /* Process frame */
4163 switch (hci_skb_pkt_type(skb)) {
4164 case HCI_EVENT_PKT:
4165 BT_DBG("%s Event packet", hdev->name);
4166 hci_event_packet(hdev, skb);
4167 break;
4168
4169 case HCI_ACLDATA_PKT:
4170 BT_DBG("%s ACL data packet", hdev->name);
4171 hci_acldata_packet(hdev, skb);
4172 break;
4173
4174 case HCI_SCODATA_PKT:
4175 BT_DBG("%s SCO data packet", hdev->name);
4176 hci_scodata_packet(hdev, skb);
4177 break;
4178
4179 default:
4180 kfree_skb(skb);
4181 break;
4182 }
4183 }
4184}
4185
4186static void hci_cmd_work(struct work_struct *work)
4187{
4188 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4189 struct sk_buff *skb;
4190
4191 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4192 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4193
4194 /* Send queued commands */
4195 if (atomic_read(&hdev->cmd_cnt)) {
4196 skb = skb_dequeue(&hdev->cmd_q);
4197 if (!skb)
4198 return;
4199
4200 kfree_skb(hdev->sent_cmd);
4201
4202 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4203 if (hdev->sent_cmd) {
4204 atomic_dec(&hdev->cmd_cnt);
4205 hci_send_frame(hdev, skb);
4206 if (test_bit(HCI_RESET, &hdev->flags))
4207 cancel_delayed_work(&hdev->cmd_timer);
4208 else
4209 schedule_delayed_work(&hdev->cmd_timer,
4210 HCI_CMD_TIMEOUT);
4211 } else {
4212 skb_queue_head(&hdev->cmd_q, skb);
4213 queue_work(hdev->workqueue, &hdev->cmd_work);
4214 }
4215 }
4216}
1/*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
28#include <linux/jiffies.h>
29#include <linux/module.h>
30#include <linux/kmod.h>
31
32#include <linux/types.h>
33#include <linux/errno.h>
34#include <linux/kernel.h>
35#include <linux/sched.h>
36#include <linux/slab.h>
37#include <linux/poll.h>
38#include <linux/fcntl.h>
39#include <linux/init.h>
40#include <linux/skbuff.h>
41#include <linux/workqueue.h>
42#include <linux/interrupt.h>
43#include <linux/rfkill.h>
44#include <linux/timer.h>
45#include <linux/crypto.h>
46#include <net/sock.h>
47
48#include <linux/uaccess.h>
49#include <asm/unaligned.h>
50
51#include <net/bluetooth/bluetooth.h>
52#include <net/bluetooth/hci_core.h>
53
54#define AUTO_OFF_TIMEOUT 2000
55
56static void hci_rx_work(struct work_struct *work);
57static void hci_cmd_work(struct work_struct *work);
58static void hci_tx_work(struct work_struct *work);
59
60/* HCI device list */
61LIST_HEAD(hci_dev_list);
62DEFINE_RWLOCK(hci_dev_list_lock);
63
64/* HCI callback list */
65LIST_HEAD(hci_cb_list);
66DEFINE_RWLOCK(hci_cb_list_lock);
67
68/* ---- HCI notifications ---- */
69
70static void hci_notify(struct hci_dev *hdev, int event)
71{
72 hci_sock_dev_event(hdev, event);
73}
74
75/* ---- HCI requests ---- */
76
77void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
78{
79 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
80
81 /* If this is the init phase check if the completed command matches
82 * the last init command, and if not just return.
83 */
84 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
85 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
86 u16 opcode = __le16_to_cpu(sent->opcode);
87 struct sk_buff *skb;
88
89 /* Some CSR based controllers generate a spontaneous
90 * reset complete event during init and any pending
91 * command will never be completed. In such a case we
92 * need to resend whatever was the last sent
93 * command.
94 */
95
96 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
97 return;
98
99 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
100 if (skb) {
101 skb_queue_head(&hdev->cmd_q, skb);
102 queue_work(hdev->workqueue, &hdev->cmd_work);
103 }
104
105 return;
106 }
107
108 if (hdev->req_status == HCI_REQ_PEND) {
109 hdev->req_result = result;
110 hdev->req_status = HCI_REQ_DONE;
111 wake_up_interruptible(&hdev->req_wait_q);
112 }
113}
114
115static void hci_req_cancel(struct hci_dev *hdev, int err)
116{
117 BT_DBG("%s err 0x%2.2x", hdev->name, err);
118
119 if (hdev->req_status == HCI_REQ_PEND) {
120 hdev->req_result = err;
121 hdev->req_status = HCI_REQ_CANCELED;
122 wake_up_interruptible(&hdev->req_wait_q);
123 }
124}
125
126/* Execute request and wait for completion. */
127static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
128 unsigned long opt, __u32 timeout)
129{
130 DECLARE_WAITQUEUE(wait, current);
131 int err = 0;
132
133 BT_DBG("%s start", hdev->name);
134
135 hdev->req_status = HCI_REQ_PEND;
136
137 add_wait_queue(&hdev->req_wait_q, &wait);
138 set_current_state(TASK_INTERRUPTIBLE);
139
140 req(hdev, opt);
141 schedule_timeout(timeout);
142
143 remove_wait_queue(&hdev->req_wait_q, &wait);
144
145 if (signal_pending(current))
146 return -EINTR;
147
148 switch (hdev->req_status) {
149 case HCI_REQ_DONE:
150 err = -bt_to_errno(hdev->req_result);
151 break;
152
153 case HCI_REQ_CANCELED:
154 err = -hdev->req_result;
155 break;
156
157 default:
158 err = -ETIMEDOUT;
159 break;
160 }
161
162 hdev->req_status = hdev->req_result = 0;
163
164 BT_DBG("%s end: err %d", hdev->name, err);
165
166 return err;
167}
168
169static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
170 unsigned long opt, __u32 timeout)
171{
172 int ret;
173
174 if (!test_bit(HCI_UP, &hdev->flags))
175 return -ENETDOWN;
176
177 /* Serialize all requests */
178 hci_req_lock(hdev);
179 ret = __hci_request(hdev, req, opt, timeout);
180 hci_req_unlock(hdev);
181
182 return ret;
183}
184
185static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
186{
187 BT_DBG("%s %ld", hdev->name, opt);
188
189 /* Reset device */
190 set_bit(HCI_RESET, &hdev->flags);
191 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
192}
193
194static void bredr_init(struct hci_dev *hdev)
195{
196 struct hci_cp_delete_stored_link_key cp;
197 __le16 param;
198 __u8 flt_type;
199
200 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
201
202 /* Mandatory initialization */
203
204 /* Reset */
205 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
206 set_bit(HCI_RESET, &hdev->flags);
207 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
208 }
209
210 /* Read Local Supported Features */
211 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
212
213 /* Read Local Version */
214 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
215
216 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
217 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
218
219 /* Read BD Address */
220 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
221
222 /* Read Class of Device */
223 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
224
225 /* Read Local Name */
226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
227
228 /* Read Voice Setting */
229 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
230
231 /* Optional initialization */
232
233 /* Clear Event Filters */
234 flt_type = HCI_FLT_CLEAR_ALL;
235 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
236
237 /* Connection accept timeout ~20 secs */
238 param = cpu_to_le16(0x7d00);
239 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
240
241 bacpy(&cp.bdaddr, BDADDR_ANY);
242 cp.delete_all = 1;
243 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
244}
245
246static void amp_init(struct hci_dev *hdev)
247{
248 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
249
250 /* Reset */
251 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
252
253 /* Read Local Version */
254 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
255
256 /* Read Local AMP Info */
257 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
258}
259
260static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
261{
262 struct sk_buff *skb;
263
264 BT_DBG("%s %ld", hdev->name, opt);
265
266 /* Driver initialization */
267
268 /* Special commands */
269 while ((skb = skb_dequeue(&hdev->driver_init))) {
270 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
271 skb->dev = (void *) hdev;
272
273 skb_queue_tail(&hdev->cmd_q, skb);
274 queue_work(hdev->workqueue, &hdev->cmd_work);
275 }
276 skb_queue_purge(&hdev->driver_init);
277
278 switch (hdev->dev_type) {
279 case HCI_BREDR:
280 bredr_init(hdev);
281 break;
282
283 case HCI_AMP:
284 amp_init(hdev);
285 break;
286
287 default:
288 BT_ERR("Unknown device type %d", hdev->dev_type);
289 break;
290 }
291
292}
293
294static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
295{
296 BT_DBG("%s", hdev->name);
297
298 /* Read LE buffer size */
299 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
300}
301
302static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
303{
304 __u8 scan = opt;
305
306 BT_DBG("%s %x", hdev->name, scan);
307
308 /* Inquiry and Page scans */
309 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
310}
311
312static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
313{
314 __u8 auth = opt;
315
316 BT_DBG("%s %x", hdev->name, auth);
317
318 /* Authentication */
319 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
320}
321
322static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
323{
324 __u8 encrypt = opt;
325
326 BT_DBG("%s %x", hdev->name, encrypt);
327
328 /* Encryption */
329 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
330}
331
332static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
333{
334 __le16 policy = cpu_to_le16(opt);
335
336 BT_DBG("%s %x", hdev->name, policy);
337
338 /* Default link policy */
339 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
340}
341
342/* Get HCI device by index.
343 * Device is held on return. */
344struct hci_dev *hci_dev_get(int index)
345{
346 struct hci_dev *hdev = NULL, *d;
347
348 BT_DBG("%d", index);
349
350 if (index < 0)
351 return NULL;
352
353 read_lock(&hci_dev_list_lock);
354 list_for_each_entry(d, &hci_dev_list, list) {
355 if (d->id == index) {
356 hdev = hci_dev_hold(d);
357 break;
358 }
359 }
360 read_unlock(&hci_dev_list_lock);
361 return hdev;
362}
363
364/* ---- Inquiry support ---- */
365
366bool hci_discovery_active(struct hci_dev *hdev)
367{
368 struct discovery_state *discov = &hdev->discovery;
369
370 switch (discov->state) {
371 case DISCOVERY_FINDING:
372 case DISCOVERY_RESOLVING:
373 return true;
374
375 default:
376 return false;
377 }
378}
379
380void hci_discovery_set_state(struct hci_dev *hdev, int state)
381{
382 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
383
384 if (hdev->discovery.state == state)
385 return;
386
387 switch (state) {
388 case DISCOVERY_STOPPED:
389 if (hdev->discovery.state != DISCOVERY_STARTING)
390 mgmt_discovering(hdev, 0);
391 break;
392 case DISCOVERY_STARTING:
393 break;
394 case DISCOVERY_FINDING:
395 mgmt_discovering(hdev, 1);
396 break;
397 case DISCOVERY_RESOLVING:
398 break;
399 case DISCOVERY_STOPPING:
400 break;
401 }
402
403 hdev->discovery.state = state;
404}
405
406static void inquiry_cache_flush(struct hci_dev *hdev)
407{
408 struct discovery_state *cache = &hdev->discovery;
409 struct inquiry_entry *p, *n;
410
411 list_for_each_entry_safe(p, n, &cache->all, all) {
412 list_del(&p->all);
413 kfree(p);
414 }
415
416 INIT_LIST_HEAD(&cache->unknown);
417 INIT_LIST_HEAD(&cache->resolve);
418}
419
420struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
421{
422 struct discovery_state *cache = &hdev->discovery;
423 struct inquiry_entry *e;
424
425 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
426
427 list_for_each_entry(e, &cache->all, all) {
428 if (!bacmp(&e->data.bdaddr, bdaddr))
429 return e;
430 }
431
432 return NULL;
433}
434
435struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
436 bdaddr_t *bdaddr)
437{
438 struct discovery_state *cache = &hdev->discovery;
439 struct inquiry_entry *e;
440
441 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
442
443 list_for_each_entry(e, &cache->unknown, list) {
444 if (!bacmp(&e->data.bdaddr, bdaddr))
445 return e;
446 }
447
448 return NULL;
449}
450
451struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
452 bdaddr_t *bdaddr,
453 int state)
454{
455 struct discovery_state *cache = &hdev->discovery;
456 struct inquiry_entry *e;
457
458 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
459
460 list_for_each_entry(e, &cache->resolve, list) {
461 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
462 return e;
463 if (!bacmp(&e->data.bdaddr, bdaddr))
464 return e;
465 }
466
467 return NULL;
468}
469
470void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
471 struct inquiry_entry *ie)
472{
473 struct discovery_state *cache = &hdev->discovery;
474 struct list_head *pos = &cache->resolve;
475 struct inquiry_entry *p;
476
477 list_del(&ie->list);
478
479 list_for_each_entry(p, &cache->resolve, list) {
480 if (p->name_state != NAME_PENDING &&
481 abs(p->data.rssi) >= abs(ie->data.rssi))
482 break;
483 pos = &p->list;
484 }
485
486 list_add(&ie->list, pos);
487}
488
489bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
490 bool name_known, bool *ssp)
491{
492 struct discovery_state *cache = &hdev->discovery;
493 struct inquiry_entry *ie;
494
495 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
496
497 if (ssp)
498 *ssp = data->ssp_mode;
499
500 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
501 if (ie) {
502 if (ie->data.ssp_mode && ssp)
503 *ssp = true;
504
505 if (ie->name_state == NAME_NEEDED &&
506 data->rssi != ie->data.rssi) {
507 ie->data.rssi = data->rssi;
508 hci_inquiry_cache_update_resolve(hdev, ie);
509 }
510
511 goto update;
512 }
513
514 /* Entry not in the cache. Add new one. */
515 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
516 if (!ie)
517 return false;
518
519 list_add(&ie->all, &cache->all);
520
521 if (name_known) {
522 ie->name_state = NAME_KNOWN;
523 } else {
524 ie->name_state = NAME_NOT_KNOWN;
525 list_add(&ie->list, &cache->unknown);
526 }
527
528update:
529 if (name_known && ie->name_state != NAME_KNOWN &&
530 ie->name_state != NAME_PENDING) {
531 ie->name_state = NAME_KNOWN;
532 list_del(&ie->list);
533 }
534
535 memcpy(&ie->data, data, sizeof(*data));
536 ie->timestamp = jiffies;
537 cache->timestamp = jiffies;
538
539 if (ie->name_state == NAME_NOT_KNOWN)
540 return false;
541
542 return true;
543}
544
545static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
546{
547 struct discovery_state *cache = &hdev->discovery;
548 struct inquiry_info *info = (struct inquiry_info *) buf;
549 struct inquiry_entry *e;
550 int copied = 0;
551
552 list_for_each_entry(e, &cache->all, all) {
553 struct inquiry_data *data = &e->data;
554
555 if (copied >= num)
556 break;
557
558 bacpy(&info->bdaddr, &data->bdaddr);
559 info->pscan_rep_mode = data->pscan_rep_mode;
560 info->pscan_period_mode = data->pscan_period_mode;
561 info->pscan_mode = data->pscan_mode;
562 memcpy(info->dev_class, data->dev_class, 3);
563 info->clock_offset = data->clock_offset;
564
565 info++;
566 copied++;
567 }
568
569 BT_DBG("cache %p, copied %d", cache, copied);
570 return copied;
571}
572
573static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
574{
575 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
576 struct hci_cp_inquiry cp;
577
578 BT_DBG("%s", hdev->name);
579
580 if (test_bit(HCI_INQUIRY, &hdev->flags))
581 return;
582
583 /* Start Inquiry */
584 memcpy(&cp.lap, &ir->lap, 3);
585 cp.length = ir->length;
586 cp.num_rsp = ir->num_rsp;
587 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
588}
589
590int hci_inquiry(void __user *arg)
591{
592 __u8 __user *ptr = arg;
593 struct hci_inquiry_req ir;
594 struct hci_dev *hdev;
595 int err = 0, do_inquiry = 0, max_rsp;
596 long timeo;
597 __u8 *buf;
598
599 if (copy_from_user(&ir, ptr, sizeof(ir)))
600 return -EFAULT;
601
602 hdev = hci_dev_get(ir.dev_id);
603 if (!hdev)
604 return -ENODEV;
605
606 hci_dev_lock(hdev);
607 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
608 inquiry_cache_empty(hdev) ||
609 ir.flags & IREQ_CACHE_FLUSH) {
610 inquiry_cache_flush(hdev);
611 do_inquiry = 1;
612 }
613 hci_dev_unlock(hdev);
614
615 timeo = ir.length * msecs_to_jiffies(2000);
616
617 if (do_inquiry) {
618 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
619 if (err < 0)
620 goto done;
621 }
622
623 /* for unlimited number of responses we will use buffer with 255 entries */
624 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
625
626 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
627 * copy it to the user space.
628 */
629 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
630 if (!buf) {
631 err = -ENOMEM;
632 goto done;
633 }
634
635 hci_dev_lock(hdev);
636 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
637 hci_dev_unlock(hdev);
638
639 BT_DBG("num_rsp %d", ir.num_rsp);
640
641 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
642 ptr += sizeof(ir);
643 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
644 ir.num_rsp))
645 err = -EFAULT;
646 } else
647 err = -EFAULT;
648
649 kfree(buf);
650
651done:
652 hci_dev_put(hdev);
653 return err;
654}
655
656/* ---- HCI ioctl helpers ---- */
657
658int hci_dev_open(__u16 dev)
659{
660 struct hci_dev *hdev;
661 int ret = 0;
662
663 hdev = hci_dev_get(dev);
664 if (!hdev)
665 return -ENODEV;
666
667 BT_DBG("%s %p", hdev->name, hdev);
668
669 hci_req_lock(hdev);
670
671 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
672 ret = -ENODEV;
673 goto done;
674 }
675
676 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
677 ret = -ERFKILL;
678 goto done;
679 }
680
681 if (test_bit(HCI_UP, &hdev->flags)) {
682 ret = -EALREADY;
683 goto done;
684 }
685
686 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
687 set_bit(HCI_RAW, &hdev->flags);
688
689 /* Treat all non BR/EDR controllers as raw devices if
690 enable_hs is not set */
691 if (hdev->dev_type != HCI_BREDR && !enable_hs)
692 set_bit(HCI_RAW, &hdev->flags);
693
694 if (hdev->open(hdev)) {
695 ret = -EIO;
696 goto done;
697 }
698
699 if (!test_bit(HCI_RAW, &hdev->flags)) {
700 atomic_set(&hdev->cmd_cnt, 1);
701 set_bit(HCI_INIT, &hdev->flags);
702 hdev->init_last_cmd = 0;
703
704 ret = __hci_request(hdev, hci_init_req, 0,
705 msecs_to_jiffies(HCI_INIT_TIMEOUT));
706
707 if (lmp_host_le_capable(hdev))
708 ret = __hci_request(hdev, hci_le_init_req, 0,
709 msecs_to_jiffies(HCI_INIT_TIMEOUT));
710
711 clear_bit(HCI_INIT, &hdev->flags);
712 }
713
714 if (!ret) {
715 hci_dev_hold(hdev);
716 set_bit(HCI_UP, &hdev->flags);
717 hci_notify(hdev, HCI_DEV_UP);
718 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
719 hci_dev_lock(hdev);
720 mgmt_powered(hdev, 1);
721 hci_dev_unlock(hdev);
722 }
723 } else {
724 /* Init failed, cleanup */
725 flush_work(&hdev->tx_work);
726 flush_work(&hdev->cmd_work);
727 flush_work(&hdev->rx_work);
728
729 skb_queue_purge(&hdev->cmd_q);
730 skb_queue_purge(&hdev->rx_q);
731
732 if (hdev->flush)
733 hdev->flush(hdev);
734
735 if (hdev->sent_cmd) {
736 kfree_skb(hdev->sent_cmd);
737 hdev->sent_cmd = NULL;
738 }
739
740 hdev->close(hdev);
741 hdev->flags = 0;
742 }
743
744done:
745 hci_req_unlock(hdev);
746 hci_dev_put(hdev);
747 return ret;
748}
749
750static int hci_dev_do_close(struct hci_dev *hdev)
751{
752 BT_DBG("%s %p", hdev->name, hdev);
753
754 cancel_work_sync(&hdev->le_scan);
755
756 cancel_delayed_work(&hdev->power_off);
757
758 hci_req_cancel(hdev, ENODEV);
759 hci_req_lock(hdev);
760
761 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
762 del_timer_sync(&hdev->cmd_timer);
763 hci_req_unlock(hdev);
764 return 0;
765 }
766
767 /* Flush RX and TX works */
768 flush_work(&hdev->tx_work);
769 flush_work(&hdev->rx_work);
770
771 if (hdev->discov_timeout > 0) {
772 cancel_delayed_work(&hdev->discov_off);
773 hdev->discov_timeout = 0;
774 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
775 }
776
777 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
778 cancel_delayed_work(&hdev->service_cache);
779
780 cancel_delayed_work_sync(&hdev->le_scan_disable);
781
782 hci_dev_lock(hdev);
783 inquiry_cache_flush(hdev);
784 hci_conn_hash_flush(hdev);
785 hci_dev_unlock(hdev);
786
787 hci_notify(hdev, HCI_DEV_DOWN);
788
789 if (hdev->flush)
790 hdev->flush(hdev);
791
792 /* Reset device */
793 skb_queue_purge(&hdev->cmd_q);
794 atomic_set(&hdev->cmd_cnt, 1);
795 if (!test_bit(HCI_RAW, &hdev->flags) &&
796 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
797 set_bit(HCI_INIT, &hdev->flags);
798 __hci_request(hdev, hci_reset_req, 0,
799 msecs_to_jiffies(250));
800 clear_bit(HCI_INIT, &hdev->flags);
801 }
802
803 /* flush cmd work */
804 flush_work(&hdev->cmd_work);
805
806 /* Drop queues */
807 skb_queue_purge(&hdev->rx_q);
808 skb_queue_purge(&hdev->cmd_q);
809 skb_queue_purge(&hdev->raw_q);
810
811 /* Drop last sent command */
812 if (hdev->sent_cmd) {
813 del_timer_sync(&hdev->cmd_timer);
814 kfree_skb(hdev->sent_cmd);
815 hdev->sent_cmd = NULL;
816 }
817
818 /* After this point our queues are empty
819 * and no tasks are scheduled. */
820 hdev->close(hdev);
821
822 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
823 hci_dev_lock(hdev);
824 mgmt_powered(hdev, 0);
825 hci_dev_unlock(hdev);
826 }
827
828 /* Clear flags */
829 hdev->flags = 0;
830
831 memset(hdev->eir, 0, sizeof(hdev->eir));
832 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
833
834 hci_req_unlock(hdev);
835
836 hci_dev_put(hdev);
837 return 0;
838}
839
840int hci_dev_close(__u16 dev)
841{
842 struct hci_dev *hdev;
843 int err;
844
845 hdev = hci_dev_get(dev);
846 if (!hdev)
847 return -ENODEV;
848
849 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
850 cancel_delayed_work(&hdev->power_off);
851
852 err = hci_dev_do_close(hdev);
853
854 hci_dev_put(hdev);
855 return err;
856}
857
858int hci_dev_reset(__u16 dev)
859{
860 struct hci_dev *hdev;
861 int ret = 0;
862
863 hdev = hci_dev_get(dev);
864 if (!hdev)
865 return -ENODEV;
866
867 hci_req_lock(hdev);
868
869 if (!test_bit(HCI_UP, &hdev->flags))
870 goto done;
871
872 /* Drop queues */
873 skb_queue_purge(&hdev->rx_q);
874 skb_queue_purge(&hdev->cmd_q);
875
876 hci_dev_lock(hdev);
877 inquiry_cache_flush(hdev);
878 hci_conn_hash_flush(hdev);
879 hci_dev_unlock(hdev);
880
881 if (hdev->flush)
882 hdev->flush(hdev);
883
884 atomic_set(&hdev->cmd_cnt, 1);
885 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
886
887 if (!test_bit(HCI_RAW, &hdev->flags))
888 ret = __hci_request(hdev, hci_reset_req, 0,
889 msecs_to_jiffies(HCI_INIT_TIMEOUT));
890
891done:
892 hci_req_unlock(hdev);
893 hci_dev_put(hdev);
894 return ret;
895}
896
897int hci_dev_reset_stat(__u16 dev)
898{
899 struct hci_dev *hdev;
900 int ret = 0;
901
902 hdev = hci_dev_get(dev);
903 if (!hdev)
904 return -ENODEV;
905
906 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
907
908 hci_dev_put(hdev);
909
910 return ret;
911}
912
913int hci_dev_cmd(unsigned int cmd, void __user *arg)
914{
915 struct hci_dev *hdev;
916 struct hci_dev_req dr;
917 int err = 0;
918
919 if (copy_from_user(&dr, arg, sizeof(dr)))
920 return -EFAULT;
921
922 hdev = hci_dev_get(dr.dev_id);
923 if (!hdev)
924 return -ENODEV;
925
926 switch (cmd) {
927 case HCISETAUTH:
928 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
929 msecs_to_jiffies(HCI_INIT_TIMEOUT));
930 break;
931
932 case HCISETENCRYPT:
933 if (!lmp_encrypt_capable(hdev)) {
934 err = -EOPNOTSUPP;
935 break;
936 }
937
938 if (!test_bit(HCI_AUTH, &hdev->flags)) {
939 /* Auth must be enabled first */
940 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
941 msecs_to_jiffies(HCI_INIT_TIMEOUT));
942 if (err)
943 break;
944 }
945
946 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
947 msecs_to_jiffies(HCI_INIT_TIMEOUT));
948 break;
949
950 case HCISETSCAN:
951 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
952 msecs_to_jiffies(HCI_INIT_TIMEOUT));
953 break;
954
955 case HCISETLINKPOL:
956 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
957 msecs_to_jiffies(HCI_INIT_TIMEOUT));
958 break;
959
960 case HCISETLINKMODE:
961 hdev->link_mode = ((__u16) dr.dev_opt) &
962 (HCI_LM_MASTER | HCI_LM_ACCEPT);
963 break;
964
965 case HCISETPTYPE:
966 hdev->pkt_type = (__u16) dr.dev_opt;
967 break;
968
969 case HCISETACLMTU:
970 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
971 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
972 break;
973
974 case HCISETSCOMTU:
975 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
976 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
977 break;
978
979 default:
980 err = -EINVAL;
981 break;
982 }
983
984 hci_dev_put(hdev);
985 return err;
986}
987
988int hci_get_dev_list(void __user *arg)
989{
990 struct hci_dev *hdev;
991 struct hci_dev_list_req *dl;
992 struct hci_dev_req *dr;
993 int n = 0, size, err;
994 __u16 dev_num;
995
996 if (get_user(dev_num, (__u16 __user *) arg))
997 return -EFAULT;
998
999 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1000 return -EINVAL;
1001
1002 size = sizeof(*dl) + dev_num * sizeof(*dr);
1003
1004 dl = kzalloc(size, GFP_KERNEL);
1005 if (!dl)
1006 return -ENOMEM;
1007
1008 dr = dl->dev_req;
1009
1010 read_lock(&hci_dev_list_lock);
1011 list_for_each_entry(hdev, &hci_dev_list, list) {
1012 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1013 cancel_delayed_work(&hdev->power_off);
1014
1015 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1016 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1017
1018 (dr + n)->dev_id = hdev->id;
1019 (dr + n)->dev_opt = hdev->flags;
1020
1021 if (++n >= dev_num)
1022 break;
1023 }
1024 read_unlock(&hci_dev_list_lock);
1025
1026 dl->dev_num = n;
1027 size = sizeof(*dl) + n * sizeof(*dr);
1028
1029 err = copy_to_user(arg, dl, size);
1030 kfree(dl);
1031
1032 return err ? -EFAULT : 0;
1033}
1034
1035int hci_get_dev_info(void __user *arg)
1036{
1037 struct hci_dev *hdev;
1038 struct hci_dev_info di;
1039 int err = 0;
1040
1041 if (copy_from_user(&di, arg, sizeof(di)))
1042 return -EFAULT;
1043
1044 hdev = hci_dev_get(di.dev_id);
1045 if (!hdev)
1046 return -ENODEV;
1047
1048 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1049 cancel_delayed_work_sync(&hdev->power_off);
1050
1051 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1052 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1053
1054 strcpy(di.name, hdev->name);
1055 di.bdaddr = hdev->bdaddr;
1056 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1057 di.flags = hdev->flags;
1058 di.pkt_type = hdev->pkt_type;
1059 di.acl_mtu = hdev->acl_mtu;
1060 di.acl_pkts = hdev->acl_pkts;
1061 di.sco_mtu = hdev->sco_mtu;
1062 di.sco_pkts = hdev->sco_pkts;
1063 di.link_policy = hdev->link_policy;
1064 di.link_mode = hdev->link_mode;
1065
1066 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1067 memcpy(&di.features, &hdev->features, sizeof(di.features));
1068
1069 if (copy_to_user(arg, &di, sizeof(di)))
1070 err = -EFAULT;
1071
1072 hci_dev_put(hdev);
1073
1074 return err;
1075}
1076
1077/* ---- Interface to HCI drivers ---- */
1078
1079static int hci_rfkill_set_block(void *data, bool blocked)
1080{
1081 struct hci_dev *hdev = data;
1082
1083 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1084
1085 if (!blocked)
1086 return 0;
1087
1088 hci_dev_do_close(hdev);
1089
1090 return 0;
1091}
1092
1093static const struct rfkill_ops hci_rfkill_ops = {
1094 .set_block = hci_rfkill_set_block,
1095};
1096
1097static void hci_power_on(struct work_struct *work)
1098{
1099 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1100
1101 BT_DBG("%s", hdev->name);
1102
1103 if (hci_dev_open(hdev->id) < 0)
1104 return;
1105
1106 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1107 schedule_delayed_work(&hdev->power_off,
1108 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
1109
1110 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1111 mgmt_index_added(hdev);
1112}
1113
1114static void hci_power_off(struct work_struct *work)
1115{
1116 struct hci_dev *hdev = container_of(work, struct hci_dev,
1117 power_off.work);
1118
1119 BT_DBG("%s", hdev->name);
1120
1121 hci_dev_do_close(hdev);
1122}
1123
1124static void hci_discov_off(struct work_struct *work)
1125{
1126 struct hci_dev *hdev;
1127 u8 scan = SCAN_PAGE;
1128
1129 hdev = container_of(work, struct hci_dev, discov_off.work);
1130
1131 BT_DBG("%s", hdev->name);
1132
1133 hci_dev_lock(hdev);
1134
1135 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1136
1137 hdev->discov_timeout = 0;
1138
1139 hci_dev_unlock(hdev);
1140}
1141
1142int hci_uuids_clear(struct hci_dev *hdev)
1143{
1144 struct list_head *p, *n;
1145
1146 list_for_each_safe(p, n, &hdev->uuids) {
1147 struct bt_uuid *uuid;
1148
1149 uuid = list_entry(p, struct bt_uuid, list);
1150
1151 list_del(p);
1152 kfree(uuid);
1153 }
1154
1155 return 0;
1156}
1157
1158int hci_link_keys_clear(struct hci_dev *hdev)
1159{
1160 struct list_head *p, *n;
1161
1162 list_for_each_safe(p, n, &hdev->link_keys) {
1163 struct link_key *key;
1164
1165 key = list_entry(p, struct link_key, list);
1166
1167 list_del(p);
1168 kfree(key);
1169 }
1170
1171 return 0;
1172}
1173
1174int hci_smp_ltks_clear(struct hci_dev *hdev)
1175{
1176 struct smp_ltk *k, *tmp;
1177
1178 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1179 list_del(&k->list);
1180 kfree(k);
1181 }
1182
1183 return 0;
1184}
1185
1186struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1187{
1188 struct link_key *k;
1189
1190 list_for_each_entry(k, &hdev->link_keys, list)
1191 if (bacmp(bdaddr, &k->bdaddr) == 0)
1192 return k;
1193
1194 return NULL;
1195}
1196
1197static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1198 u8 key_type, u8 old_key_type)
1199{
1200 /* Legacy key */
1201 if (key_type < 0x03)
1202 return true;
1203
1204 /* Debug keys are insecure so don't store them persistently */
1205 if (key_type == HCI_LK_DEBUG_COMBINATION)
1206 return false;
1207
1208 /* Changed combination key and there's no previous one */
1209 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1210 return false;
1211
1212 /* Security mode 3 case */
1213 if (!conn)
1214 return true;
1215
1216 /* Neither local nor remote side had no-bonding as requirement */
1217 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1218 return true;
1219
1220 /* Local side had dedicated bonding as requirement */
1221 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1222 return true;
1223
1224 /* Remote side had dedicated bonding as requirement */
1225 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1226 return true;
1227
1228 /* If none of the above criteria match, then don't store the key
1229 * persistently */
1230 return false;
1231}
1232
1233struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1234{
1235 struct smp_ltk *k;
1236
1237 list_for_each_entry(k, &hdev->long_term_keys, list) {
1238 if (k->ediv != ediv ||
1239 memcmp(rand, k->rand, sizeof(k->rand)))
1240 continue;
1241
1242 return k;
1243 }
1244
1245 return NULL;
1246}
1247EXPORT_SYMBOL(hci_find_ltk);
1248
1249struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1250 u8 addr_type)
1251{
1252 struct smp_ltk *k;
1253
1254 list_for_each_entry(k, &hdev->long_term_keys, list)
1255 if (addr_type == k->bdaddr_type &&
1256 bacmp(bdaddr, &k->bdaddr) == 0)
1257 return k;
1258
1259 return NULL;
1260}
1261EXPORT_SYMBOL(hci_find_ltk_by_addr);
1262
1263int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1264 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1265{
1266 struct link_key *key, *old_key;
1267 u8 old_key_type;
1268 bool persistent;
1269
1270 old_key = hci_find_link_key(hdev, bdaddr);
1271 if (old_key) {
1272 old_key_type = old_key->type;
1273 key = old_key;
1274 } else {
1275 old_key_type = conn ? conn->key_type : 0xff;
1276 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1277 if (!key)
1278 return -ENOMEM;
1279 list_add(&key->list, &hdev->link_keys);
1280 }
1281
1282 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1283
1284 /* Some buggy controller combinations generate a changed
1285 * combination key for legacy pairing even when there's no
1286 * previous key */
1287 if (type == HCI_LK_CHANGED_COMBINATION &&
1288 (!conn || conn->remote_auth == 0xff) &&
1289 old_key_type == 0xff) {
1290 type = HCI_LK_COMBINATION;
1291 if (conn)
1292 conn->key_type = type;
1293 }
1294
1295 bacpy(&key->bdaddr, bdaddr);
1296 memcpy(key->val, val, 16);
1297 key->pin_len = pin_len;
1298
1299 if (type == HCI_LK_CHANGED_COMBINATION)
1300 key->type = old_key_type;
1301 else
1302 key->type = type;
1303
1304 if (!new_key)
1305 return 0;
1306
1307 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1308
1309 mgmt_new_link_key(hdev, key, persistent);
1310
1311 if (conn)
1312 conn->flush_key = !persistent;
1313
1314 return 0;
1315}
1316
1317int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1318 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
1319 ediv, u8 rand[8])
1320{
1321 struct smp_ltk *key, *old_key;
1322
1323 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1324 return 0;
1325
1326 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1327 if (old_key)
1328 key = old_key;
1329 else {
1330 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1331 if (!key)
1332 return -ENOMEM;
1333 list_add(&key->list, &hdev->long_term_keys);
1334 }
1335
1336 bacpy(&key->bdaddr, bdaddr);
1337 key->bdaddr_type = addr_type;
1338 memcpy(key->val, tk, sizeof(key->val));
1339 key->authenticated = authenticated;
1340 key->ediv = ediv;
1341 key->enc_size = enc_size;
1342 key->type = type;
1343 memcpy(key->rand, rand, sizeof(key->rand));
1344
1345 if (!new_key)
1346 return 0;
1347
1348 if (type & HCI_SMP_LTK)
1349 mgmt_new_ltk(hdev, key, 1);
1350
1351 return 0;
1352}
1353
1354int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1355{
1356 struct link_key *key;
1357
1358 key = hci_find_link_key(hdev, bdaddr);
1359 if (!key)
1360 return -ENOENT;
1361
1362 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1363
1364 list_del(&key->list);
1365 kfree(key);
1366
1367 return 0;
1368}
1369
1370int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1371{
1372 struct smp_ltk *k, *tmp;
1373
1374 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1375 if (bacmp(bdaddr, &k->bdaddr))
1376 continue;
1377
1378 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1379
1380 list_del(&k->list);
1381 kfree(k);
1382 }
1383
1384 return 0;
1385}
1386
1387/* HCI command timer function */
1388static void hci_cmd_timer(unsigned long arg)
1389{
1390 struct hci_dev *hdev = (void *) arg;
1391
1392 BT_ERR("%s command tx timeout", hdev->name);
1393 atomic_set(&hdev->cmd_cnt, 1);
1394 queue_work(hdev->workqueue, &hdev->cmd_work);
1395}
1396
1397struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1398 bdaddr_t *bdaddr)
1399{
1400 struct oob_data *data;
1401
1402 list_for_each_entry(data, &hdev->remote_oob_data, list)
1403 if (bacmp(bdaddr, &data->bdaddr) == 0)
1404 return data;
1405
1406 return NULL;
1407}
1408
1409int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1410{
1411 struct oob_data *data;
1412
1413 data = hci_find_remote_oob_data(hdev, bdaddr);
1414 if (!data)
1415 return -ENOENT;
1416
1417 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1418
1419 list_del(&data->list);
1420 kfree(data);
1421
1422 return 0;
1423}
1424
1425int hci_remote_oob_data_clear(struct hci_dev *hdev)
1426{
1427 struct oob_data *data, *n;
1428
1429 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1430 list_del(&data->list);
1431 kfree(data);
1432 }
1433
1434 return 0;
1435}
1436
1437int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1438 u8 *randomizer)
1439{
1440 struct oob_data *data;
1441
1442 data = hci_find_remote_oob_data(hdev, bdaddr);
1443
1444 if (!data) {
1445 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1446 if (!data)
1447 return -ENOMEM;
1448
1449 bacpy(&data->bdaddr, bdaddr);
1450 list_add(&data->list, &hdev->remote_oob_data);
1451 }
1452
1453 memcpy(data->hash, hash, sizeof(data->hash));
1454 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1455
1456 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1457
1458 return 0;
1459}
1460
1461struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1462{
1463 struct bdaddr_list *b;
1464
1465 list_for_each_entry(b, &hdev->blacklist, list)
1466 if (bacmp(bdaddr, &b->bdaddr) == 0)
1467 return b;
1468
1469 return NULL;
1470}
1471
1472int hci_blacklist_clear(struct hci_dev *hdev)
1473{
1474 struct list_head *p, *n;
1475
1476 list_for_each_safe(p, n, &hdev->blacklist) {
1477 struct bdaddr_list *b;
1478
1479 b = list_entry(p, struct bdaddr_list, list);
1480
1481 list_del(p);
1482 kfree(b);
1483 }
1484
1485 return 0;
1486}
1487
1488int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1489{
1490 struct bdaddr_list *entry;
1491
1492 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1493 return -EBADF;
1494
1495 if (hci_blacklist_lookup(hdev, bdaddr))
1496 return -EEXIST;
1497
1498 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1499 if (!entry)
1500 return -ENOMEM;
1501
1502 bacpy(&entry->bdaddr, bdaddr);
1503
1504 list_add(&entry->list, &hdev->blacklist);
1505
1506 return mgmt_device_blocked(hdev, bdaddr, type);
1507}
1508
1509int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1510{
1511 struct bdaddr_list *entry;
1512
1513 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1514 return hci_blacklist_clear(hdev);
1515
1516 entry = hci_blacklist_lookup(hdev, bdaddr);
1517 if (!entry)
1518 return -ENOENT;
1519
1520 list_del(&entry->list);
1521 kfree(entry);
1522
1523 return mgmt_device_unblocked(hdev, bdaddr, type);
1524}
1525
1526static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1527{
1528 struct le_scan_params *param = (struct le_scan_params *) opt;
1529 struct hci_cp_le_set_scan_param cp;
1530
1531 memset(&cp, 0, sizeof(cp));
1532 cp.type = param->type;
1533 cp.interval = cpu_to_le16(param->interval);
1534 cp.window = cpu_to_le16(param->window);
1535
1536 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1537}
1538
1539static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1540{
1541 struct hci_cp_le_set_scan_enable cp;
1542
1543 memset(&cp, 0, sizeof(cp));
1544 cp.enable = 1;
1545
1546 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1547}
1548
1549static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1550 u16 window, int timeout)
1551{
1552 long timeo = msecs_to_jiffies(3000);
1553 struct le_scan_params param;
1554 int err;
1555
1556 BT_DBG("%s", hdev->name);
1557
1558 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1559 return -EINPROGRESS;
1560
1561 param.type = type;
1562 param.interval = interval;
1563 param.window = window;
1564
1565 hci_req_lock(hdev);
1566
1567 err = __hci_request(hdev, le_scan_param_req, (unsigned long) ¶m,
1568 timeo);
1569 if (!err)
1570 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1571
1572 hci_req_unlock(hdev);
1573
1574 if (err < 0)
1575 return err;
1576
1577 schedule_delayed_work(&hdev->le_scan_disable,
1578 msecs_to_jiffies(timeout));
1579
1580 return 0;
1581}
1582
1583int hci_cancel_le_scan(struct hci_dev *hdev)
1584{
1585 BT_DBG("%s", hdev->name);
1586
1587 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1588 return -EALREADY;
1589
1590 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1591 struct hci_cp_le_set_scan_enable cp;
1592
1593 /* Send HCI command to disable LE Scan */
1594 memset(&cp, 0, sizeof(cp));
1595 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1596 }
1597
1598 return 0;
1599}
1600
1601static void le_scan_disable_work(struct work_struct *work)
1602{
1603 struct hci_dev *hdev = container_of(work, struct hci_dev,
1604 le_scan_disable.work);
1605 struct hci_cp_le_set_scan_enable cp;
1606
1607 BT_DBG("%s", hdev->name);
1608
1609 memset(&cp, 0, sizeof(cp));
1610
1611 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1612}
1613
1614static void le_scan_work(struct work_struct *work)
1615{
1616 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1617 struct le_scan_params *param = &hdev->le_scan_params;
1618
1619 BT_DBG("%s", hdev->name);
1620
1621 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1622 param->timeout);
1623}
1624
1625int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1626 int timeout)
1627{
1628 struct le_scan_params *param = &hdev->le_scan_params;
1629
1630 BT_DBG("%s", hdev->name);
1631
1632 if (work_busy(&hdev->le_scan))
1633 return -EINPROGRESS;
1634
1635 param->type = type;
1636 param->interval = interval;
1637 param->window = window;
1638 param->timeout = timeout;
1639
1640 queue_work(system_long_wq, &hdev->le_scan);
1641
1642 return 0;
1643}
1644
1645/* Alloc HCI device */
1646struct hci_dev *hci_alloc_dev(void)
1647{
1648 struct hci_dev *hdev;
1649
1650 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1651 if (!hdev)
1652 return NULL;
1653
1654 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1655 hdev->esco_type = (ESCO_HV1);
1656 hdev->link_mode = (HCI_LM_ACCEPT);
1657 hdev->io_capability = 0x03; /* No Input No Output */
1658
1659 hdev->sniff_max_interval = 800;
1660 hdev->sniff_min_interval = 80;
1661
1662 mutex_init(&hdev->lock);
1663 mutex_init(&hdev->req_lock);
1664
1665 INIT_LIST_HEAD(&hdev->mgmt_pending);
1666 INIT_LIST_HEAD(&hdev->blacklist);
1667 INIT_LIST_HEAD(&hdev->uuids);
1668 INIT_LIST_HEAD(&hdev->link_keys);
1669 INIT_LIST_HEAD(&hdev->long_term_keys);
1670 INIT_LIST_HEAD(&hdev->remote_oob_data);
1671
1672 INIT_WORK(&hdev->rx_work, hci_rx_work);
1673 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1674 INIT_WORK(&hdev->tx_work, hci_tx_work);
1675 INIT_WORK(&hdev->power_on, hci_power_on);
1676 INIT_WORK(&hdev->le_scan, le_scan_work);
1677
1678 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1679 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1680 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1681
1682 skb_queue_head_init(&hdev->driver_init);
1683 skb_queue_head_init(&hdev->rx_q);
1684 skb_queue_head_init(&hdev->cmd_q);
1685 skb_queue_head_init(&hdev->raw_q);
1686
1687 init_waitqueue_head(&hdev->req_wait_q);
1688
1689 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1690
1691 hci_init_sysfs(hdev);
1692 discovery_init(hdev);
1693 hci_conn_hash_init(hdev);
1694
1695 return hdev;
1696}
1697EXPORT_SYMBOL(hci_alloc_dev);
1698
1699/* Free HCI device */
1700void hci_free_dev(struct hci_dev *hdev)
1701{
1702 skb_queue_purge(&hdev->driver_init);
1703
1704 /* will free via device release */
1705 put_device(&hdev->dev);
1706}
1707EXPORT_SYMBOL(hci_free_dev);
1708
1709/* Register HCI device */
1710int hci_register_dev(struct hci_dev *hdev)
1711{
1712 struct list_head *head, *p;
1713 int id, error;
1714
1715 if (!hdev->open || !hdev->close)
1716 return -EINVAL;
1717
1718 write_lock(&hci_dev_list_lock);
1719
1720 /* Do not allow HCI_AMP devices to register at index 0,
1721 * so the index can be used as the AMP controller ID.
1722 */
1723 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
1724 head = &hci_dev_list;
1725
1726 /* Find first available device id */
1727 list_for_each(p, &hci_dev_list) {
1728 int nid = list_entry(p, struct hci_dev, list)->id;
1729 if (nid > id)
1730 break;
1731 if (nid == id)
1732 id++;
1733 head = p;
1734 }
1735
1736 sprintf(hdev->name, "hci%d", id);
1737 hdev->id = id;
1738
1739 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1740
1741 list_add(&hdev->list, head);
1742
1743 write_unlock(&hci_dev_list_lock);
1744
1745 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1746 WQ_MEM_RECLAIM, 1);
1747 if (!hdev->workqueue) {
1748 error = -ENOMEM;
1749 goto err;
1750 }
1751
1752 error = hci_add_sysfs(hdev);
1753 if (error < 0)
1754 goto err_wqueue;
1755
1756 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1757 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1758 if (hdev->rfkill) {
1759 if (rfkill_register(hdev->rfkill) < 0) {
1760 rfkill_destroy(hdev->rfkill);
1761 hdev->rfkill = NULL;
1762 }
1763 }
1764
1765 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1766 set_bit(HCI_SETUP, &hdev->dev_flags);
1767 schedule_work(&hdev->power_on);
1768
1769 hci_notify(hdev, HCI_DEV_REG);
1770 hci_dev_hold(hdev);
1771
1772 return id;
1773
1774err_wqueue:
1775 destroy_workqueue(hdev->workqueue);
1776err:
1777 write_lock(&hci_dev_list_lock);
1778 list_del(&hdev->list);
1779 write_unlock(&hci_dev_list_lock);
1780
1781 return error;
1782}
1783EXPORT_SYMBOL(hci_register_dev);
1784
1785/* Unregister HCI device */
1786void hci_unregister_dev(struct hci_dev *hdev)
1787{
1788 int i;
1789
1790 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1791
1792 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1793
1794 write_lock(&hci_dev_list_lock);
1795 list_del(&hdev->list);
1796 write_unlock(&hci_dev_list_lock);
1797
1798 hci_dev_do_close(hdev);
1799
1800 for (i = 0; i < NUM_REASSEMBLY; i++)
1801 kfree_skb(hdev->reassembly[i]);
1802
1803 if (!test_bit(HCI_INIT, &hdev->flags) &&
1804 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1805 hci_dev_lock(hdev);
1806 mgmt_index_removed(hdev);
1807 hci_dev_unlock(hdev);
1808 }
1809
1810 /* mgmt_index_removed should take care of emptying the
1811 * pending list */
1812 BUG_ON(!list_empty(&hdev->mgmt_pending));
1813
1814 hci_notify(hdev, HCI_DEV_UNREG);
1815
1816 if (hdev->rfkill) {
1817 rfkill_unregister(hdev->rfkill);
1818 rfkill_destroy(hdev->rfkill);
1819 }
1820
1821 hci_del_sysfs(hdev);
1822
1823 destroy_workqueue(hdev->workqueue);
1824
1825 hci_dev_lock(hdev);
1826 hci_blacklist_clear(hdev);
1827 hci_uuids_clear(hdev);
1828 hci_link_keys_clear(hdev);
1829 hci_smp_ltks_clear(hdev);
1830 hci_remote_oob_data_clear(hdev);
1831 hci_dev_unlock(hdev);
1832
1833 hci_dev_put(hdev);
1834}
1835EXPORT_SYMBOL(hci_unregister_dev);
1836
1837/* Suspend HCI device */
1838int hci_suspend_dev(struct hci_dev *hdev)
1839{
1840 hci_notify(hdev, HCI_DEV_SUSPEND);
1841 return 0;
1842}
1843EXPORT_SYMBOL(hci_suspend_dev);
1844
1845/* Resume HCI device */
1846int hci_resume_dev(struct hci_dev *hdev)
1847{
1848 hci_notify(hdev, HCI_DEV_RESUME);
1849 return 0;
1850}
1851EXPORT_SYMBOL(hci_resume_dev);
1852
1853/* Receive frame from HCI drivers */
1854int hci_recv_frame(struct sk_buff *skb)
1855{
1856 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1857 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1858 && !test_bit(HCI_INIT, &hdev->flags))) {
1859 kfree_skb(skb);
1860 return -ENXIO;
1861 }
1862
1863 /* Incomming skb */
1864 bt_cb(skb)->incoming = 1;
1865
1866 /* Time stamp */
1867 __net_timestamp(skb);
1868
1869 skb_queue_tail(&hdev->rx_q, skb);
1870 queue_work(hdev->workqueue, &hdev->rx_work);
1871
1872 return 0;
1873}
1874EXPORT_SYMBOL(hci_recv_frame);
1875
1876static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1877 int count, __u8 index)
1878{
1879 int len = 0;
1880 int hlen = 0;
1881 int remain = count;
1882 struct sk_buff *skb;
1883 struct bt_skb_cb *scb;
1884
1885 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1886 index >= NUM_REASSEMBLY)
1887 return -EILSEQ;
1888
1889 skb = hdev->reassembly[index];
1890
1891 if (!skb) {
1892 switch (type) {
1893 case HCI_ACLDATA_PKT:
1894 len = HCI_MAX_FRAME_SIZE;
1895 hlen = HCI_ACL_HDR_SIZE;
1896 break;
1897 case HCI_EVENT_PKT:
1898 len = HCI_MAX_EVENT_SIZE;
1899 hlen = HCI_EVENT_HDR_SIZE;
1900 break;
1901 case HCI_SCODATA_PKT:
1902 len = HCI_MAX_SCO_SIZE;
1903 hlen = HCI_SCO_HDR_SIZE;
1904 break;
1905 }
1906
1907 skb = bt_skb_alloc(len, GFP_ATOMIC);
1908 if (!skb)
1909 return -ENOMEM;
1910
1911 scb = (void *) skb->cb;
1912 scb->expect = hlen;
1913 scb->pkt_type = type;
1914
1915 skb->dev = (void *) hdev;
1916 hdev->reassembly[index] = skb;
1917 }
1918
1919 while (count) {
1920 scb = (void *) skb->cb;
1921 len = min_t(uint, scb->expect, count);
1922
1923 memcpy(skb_put(skb, len), data, len);
1924
1925 count -= len;
1926 data += len;
1927 scb->expect -= len;
1928 remain = count;
1929
1930 switch (type) {
1931 case HCI_EVENT_PKT:
1932 if (skb->len == HCI_EVENT_HDR_SIZE) {
1933 struct hci_event_hdr *h = hci_event_hdr(skb);
1934 scb->expect = h->plen;
1935
1936 if (skb_tailroom(skb) < scb->expect) {
1937 kfree_skb(skb);
1938 hdev->reassembly[index] = NULL;
1939 return -ENOMEM;
1940 }
1941 }
1942 break;
1943
1944 case HCI_ACLDATA_PKT:
1945 if (skb->len == HCI_ACL_HDR_SIZE) {
1946 struct hci_acl_hdr *h = hci_acl_hdr(skb);
1947 scb->expect = __le16_to_cpu(h->dlen);
1948
1949 if (skb_tailroom(skb) < scb->expect) {
1950 kfree_skb(skb);
1951 hdev->reassembly[index] = NULL;
1952 return -ENOMEM;
1953 }
1954 }
1955 break;
1956
1957 case HCI_SCODATA_PKT:
1958 if (skb->len == HCI_SCO_HDR_SIZE) {
1959 struct hci_sco_hdr *h = hci_sco_hdr(skb);
1960 scb->expect = h->dlen;
1961
1962 if (skb_tailroom(skb) < scb->expect) {
1963 kfree_skb(skb);
1964 hdev->reassembly[index] = NULL;
1965 return -ENOMEM;
1966 }
1967 }
1968 break;
1969 }
1970
1971 if (scb->expect == 0) {
1972 /* Complete frame */
1973
1974 bt_cb(skb)->pkt_type = type;
1975 hci_recv_frame(skb);
1976
1977 hdev->reassembly[index] = NULL;
1978 return remain;
1979 }
1980 }
1981
1982 return remain;
1983}
1984
1985int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
1986{
1987 int rem = 0;
1988
1989 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
1990 return -EILSEQ;
1991
1992 while (count) {
1993 rem = hci_reassembly(hdev, type, data, count, type - 1);
1994 if (rem < 0)
1995 return rem;
1996
1997 data += (count - rem);
1998 count = rem;
1999 }
2000
2001 return rem;
2002}
2003EXPORT_SYMBOL(hci_recv_fragment);
2004
2005#define STREAM_REASSEMBLY 0
2006
2007int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2008{
2009 int type;
2010 int rem = 0;
2011
2012 while (count) {
2013 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2014
2015 if (!skb) {
2016 struct { char type; } *pkt;
2017
2018 /* Start of the frame */
2019 pkt = data;
2020 type = pkt->type;
2021
2022 data++;
2023 count--;
2024 } else
2025 type = bt_cb(skb)->pkt_type;
2026
2027 rem = hci_reassembly(hdev, type, data, count,
2028 STREAM_REASSEMBLY);
2029 if (rem < 0)
2030 return rem;
2031
2032 data += (count - rem);
2033 count = rem;
2034 }
2035
2036 return rem;
2037}
2038EXPORT_SYMBOL(hci_recv_stream_fragment);
2039
2040/* ---- Interface to upper protocols ---- */
2041
2042int hci_register_cb(struct hci_cb *cb)
2043{
2044 BT_DBG("%p name %s", cb, cb->name);
2045
2046 write_lock(&hci_cb_list_lock);
2047 list_add(&cb->list, &hci_cb_list);
2048 write_unlock(&hci_cb_list_lock);
2049
2050 return 0;
2051}
2052EXPORT_SYMBOL(hci_register_cb);
2053
2054int hci_unregister_cb(struct hci_cb *cb)
2055{
2056 BT_DBG("%p name %s", cb, cb->name);
2057
2058 write_lock(&hci_cb_list_lock);
2059 list_del(&cb->list);
2060 write_unlock(&hci_cb_list_lock);
2061
2062 return 0;
2063}
2064EXPORT_SYMBOL(hci_unregister_cb);
2065
2066static int hci_send_frame(struct sk_buff *skb)
2067{
2068 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2069
2070 if (!hdev) {
2071 kfree_skb(skb);
2072 return -ENODEV;
2073 }
2074
2075 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2076
2077 /* Time stamp */
2078 __net_timestamp(skb);
2079
2080 /* Send copy to monitor */
2081 hci_send_to_monitor(hdev, skb);
2082
2083 if (atomic_read(&hdev->promisc)) {
2084 /* Send copy to the sockets */
2085 hci_send_to_sock(hdev, skb);
2086 }
2087
2088 /* Get rid of skb owner, prior to sending to the driver. */
2089 skb_orphan(skb);
2090
2091 return hdev->send(skb);
2092}
2093
2094/* Send HCI command */
2095int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2096{
2097 int len = HCI_COMMAND_HDR_SIZE + plen;
2098 struct hci_command_hdr *hdr;
2099 struct sk_buff *skb;
2100
2101 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
2102
2103 skb = bt_skb_alloc(len, GFP_ATOMIC);
2104 if (!skb) {
2105 BT_ERR("%s no memory for command", hdev->name);
2106 return -ENOMEM;
2107 }
2108
2109 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2110 hdr->opcode = cpu_to_le16(opcode);
2111 hdr->plen = plen;
2112
2113 if (plen)
2114 memcpy(skb_put(skb, plen), param, plen);
2115
2116 BT_DBG("skb len %d", skb->len);
2117
2118 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2119 skb->dev = (void *) hdev;
2120
2121 if (test_bit(HCI_INIT, &hdev->flags))
2122 hdev->init_last_cmd = opcode;
2123
2124 skb_queue_tail(&hdev->cmd_q, skb);
2125 queue_work(hdev->workqueue, &hdev->cmd_work);
2126
2127 return 0;
2128}
2129
2130/* Get data from the previously sent command */
2131void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2132{
2133 struct hci_command_hdr *hdr;
2134
2135 if (!hdev->sent_cmd)
2136 return NULL;
2137
2138 hdr = (void *) hdev->sent_cmd->data;
2139
2140 if (hdr->opcode != cpu_to_le16(opcode))
2141 return NULL;
2142
2143 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
2144
2145 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2146}
2147
2148/* Send ACL data */
2149static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2150{
2151 struct hci_acl_hdr *hdr;
2152 int len = skb->len;
2153
2154 skb_push(skb, HCI_ACL_HDR_SIZE);
2155 skb_reset_transport_header(skb);
2156 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2157 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2158 hdr->dlen = cpu_to_le16(len);
2159}
2160
2161static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2162 struct sk_buff *skb, __u16 flags)
2163{
2164 struct hci_dev *hdev = conn->hdev;
2165 struct sk_buff *list;
2166
2167 skb->len = skb_headlen(skb);
2168 skb->data_len = 0;
2169
2170 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2171 hci_add_acl_hdr(skb, conn->handle, flags);
2172
2173 list = skb_shinfo(skb)->frag_list;
2174 if (!list) {
2175 /* Non fragmented */
2176 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2177
2178 skb_queue_tail(queue, skb);
2179 } else {
2180 /* Fragmented */
2181 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2182
2183 skb_shinfo(skb)->frag_list = NULL;
2184
2185 /* Queue all fragments atomically */
2186 spin_lock(&queue->lock);
2187
2188 __skb_queue_tail(queue, skb);
2189
2190 flags &= ~ACL_START;
2191 flags |= ACL_CONT;
2192 do {
2193 skb = list; list = list->next;
2194
2195 skb->dev = (void *) hdev;
2196 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2197 hci_add_acl_hdr(skb, conn->handle, flags);
2198
2199 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2200
2201 __skb_queue_tail(queue, skb);
2202 } while (list);
2203
2204 spin_unlock(&queue->lock);
2205 }
2206}
2207
2208void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2209{
2210 struct hci_conn *conn = chan->conn;
2211 struct hci_dev *hdev = conn->hdev;
2212
2213 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2214
2215 skb->dev = (void *) hdev;
2216
2217 hci_queue_acl(conn, &chan->data_q, skb, flags);
2218
2219 queue_work(hdev->workqueue, &hdev->tx_work);
2220}
2221EXPORT_SYMBOL(hci_send_acl);
2222
2223/* Send SCO data */
2224void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2225{
2226 struct hci_dev *hdev = conn->hdev;
2227 struct hci_sco_hdr hdr;
2228
2229 BT_DBG("%s len %d", hdev->name, skb->len);
2230
2231 hdr.handle = cpu_to_le16(conn->handle);
2232 hdr.dlen = skb->len;
2233
2234 skb_push(skb, HCI_SCO_HDR_SIZE);
2235 skb_reset_transport_header(skb);
2236 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2237
2238 skb->dev = (void *) hdev;
2239 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2240
2241 skb_queue_tail(&conn->data_q, skb);
2242 queue_work(hdev->workqueue, &hdev->tx_work);
2243}
2244EXPORT_SYMBOL(hci_send_sco);
2245
2246/* ---- HCI TX task (outgoing data) ---- */
2247
2248/* HCI Connection scheduler */
2249static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2250{
2251 struct hci_conn_hash *h = &hdev->conn_hash;
2252 struct hci_conn *conn = NULL, *c;
2253 unsigned int num = 0, min = ~0;
2254
2255 /* We don't have to lock device here. Connections are always
2256 * added and removed with TX task disabled. */
2257
2258 rcu_read_lock();
2259
2260 list_for_each_entry_rcu(c, &h->list, list) {
2261 if (c->type != type || skb_queue_empty(&c->data_q))
2262 continue;
2263
2264 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2265 continue;
2266
2267 num++;
2268
2269 if (c->sent < min) {
2270 min = c->sent;
2271 conn = c;
2272 }
2273
2274 if (hci_conn_num(hdev, type) == num)
2275 break;
2276 }
2277
2278 rcu_read_unlock();
2279
2280 if (conn) {
2281 int cnt, q;
2282
2283 switch (conn->type) {
2284 case ACL_LINK:
2285 cnt = hdev->acl_cnt;
2286 break;
2287 case SCO_LINK:
2288 case ESCO_LINK:
2289 cnt = hdev->sco_cnt;
2290 break;
2291 case LE_LINK:
2292 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2293 break;
2294 default:
2295 cnt = 0;
2296 BT_ERR("Unknown link type");
2297 }
2298
2299 q = cnt / num;
2300 *quote = q ? q : 1;
2301 } else
2302 *quote = 0;
2303
2304 BT_DBG("conn %p quote %d", conn, *quote);
2305 return conn;
2306}
2307
2308static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2309{
2310 struct hci_conn_hash *h = &hdev->conn_hash;
2311 struct hci_conn *c;
2312
2313 BT_ERR("%s link tx timeout", hdev->name);
2314
2315 rcu_read_lock();
2316
2317 /* Kill stalled connections */
2318 list_for_each_entry_rcu(c, &h->list, list) {
2319 if (c->type == type && c->sent) {
2320 BT_ERR("%s killing stalled connection %s",
2321 hdev->name, batostr(&c->dst));
2322 hci_acl_disconn(c, 0x13);
2323 }
2324 }
2325
2326 rcu_read_unlock();
2327}
2328
2329static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2330 int *quote)
2331{
2332 struct hci_conn_hash *h = &hdev->conn_hash;
2333 struct hci_chan *chan = NULL;
2334 unsigned int num = 0, min = ~0, cur_prio = 0;
2335 struct hci_conn *conn;
2336 int cnt, q, conn_num = 0;
2337
2338 BT_DBG("%s", hdev->name);
2339
2340 rcu_read_lock();
2341
2342 list_for_each_entry_rcu(conn, &h->list, list) {
2343 struct hci_chan *tmp;
2344
2345 if (conn->type != type)
2346 continue;
2347
2348 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2349 continue;
2350
2351 conn_num++;
2352
2353 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2354 struct sk_buff *skb;
2355
2356 if (skb_queue_empty(&tmp->data_q))
2357 continue;
2358
2359 skb = skb_peek(&tmp->data_q);
2360 if (skb->priority < cur_prio)
2361 continue;
2362
2363 if (skb->priority > cur_prio) {
2364 num = 0;
2365 min = ~0;
2366 cur_prio = skb->priority;
2367 }
2368
2369 num++;
2370
2371 if (conn->sent < min) {
2372 min = conn->sent;
2373 chan = tmp;
2374 }
2375 }
2376
2377 if (hci_conn_num(hdev, type) == conn_num)
2378 break;
2379 }
2380
2381 rcu_read_unlock();
2382
2383 if (!chan)
2384 return NULL;
2385
2386 switch (chan->conn->type) {
2387 case ACL_LINK:
2388 cnt = hdev->acl_cnt;
2389 break;
2390 case SCO_LINK:
2391 case ESCO_LINK:
2392 cnt = hdev->sco_cnt;
2393 break;
2394 case LE_LINK:
2395 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2396 break;
2397 default:
2398 cnt = 0;
2399 BT_ERR("Unknown link type");
2400 }
2401
2402 q = cnt / num;
2403 *quote = q ? q : 1;
2404 BT_DBG("chan %p quote %d", chan, *quote);
2405 return chan;
2406}
2407
2408static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2409{
2410 struct hci_conn_hash *h = &hdev->conn_hash;
2411 struct hci_conn *conn;
2412 int num = 0;
2413
2414 BT_DBG("%s", hdev->name);
2415
2416 rcu_read_lock();
2417
2418 list_for_each_entry_rcu(conn, &h->list, list) {
2419 struct hci_chan *chan;
2420
2421 if (conn->type != type)
2422 continue;
2423
2424 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2425 continue;
2426
2427 num++;
2428
2429 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
2430 struct sk_buff *skb;
2431
2432 if (chan->sent) {
2433 chan->sent = 0;
2434 continue;
2435 }
2436
2437 if (skb_queue_empty(&chan->data_q))
2438 continue;
2439
2440 skb = skb_peek(&chan->data_q);
2441 if (skb->priority >= HCI_PRIO_MAX - 1)
2442 continue;
2443
2444 skb->priority = HCI_PRIO_MAX - 1;
2445
2446 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2447 skb->priority);
2448 }
2449
2450 if (hci_conn_num(hdev, type) == num)
2451 break;
2452 }
2453
2454 rcu_read_unlock();
2455
2456}
2457
2458static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2459{
2460 /* Calculate count of blocks used by this packet */
2461 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2462}
2463
2464static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
2465{
2466 if (!test_bit(HCI_RAW, &hdev->flags)) {
2467 /* ACL tx timeout must be longer than maximum
2468 * link supervision timeout (40.9 seconds) */
2469 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
2470 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
2471 hci_link_tx_to(hdev, ACL_LINK);
2472 }
2473}
2474
2475static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2476{
2477 unsigned int cnt = hdev->acl_cnt;
2478 struct hci_chan *chan;
2479 struct sk_buff *skb;
2480 int quote;
2481
2482 __check_timeout(hdev, cnt);
2483
2484 while (hdev->acl_cnt &&
2485 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
2486 u32 priority = (skb_peek(&chan->data_q))->priority;
2487 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2488 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2489 skb->len, skb->priority);
2490
2491 /* Stop if priority has changed */
2492 if (skb->priority < priority)
2493 break;
2494
2495 skb = skb_dequeue(&chan->data_q);
2496
2497 hci_conn_enter_active_mode(chan->conn,
2498 bt_cb(skb)->force_active);
2499
2500 hci_send_frame(skb);
2501 hdev->acl_last_tx = jiffies;
2502
2503 hdev->acl_cnt--;
2504 chan->sent++;
2505 chan->conn->sent++;
2506 }
2507 }
2508
2509 if (cnt != hdev->acl_cnt)
2510 hci_prio_recalculate(hdev, ACL_LINK);
2511}
2512
2513static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2514{
2515 unsigned int cnt = hdev->block_cnt;
2516 struct hci_chan *chan;
2517 struct sk_buff *skb;
2518 int quote;
2519
2520 __check_timeout(hdev, cnt);
2521
2522 while (hdev->block_cnt > 0 &&
2523 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
2524 u32 priority = (skb_peek(&chan->data_q))->priority;
2525 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2526 int blocks;
2527
2528 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2529 skb->len, skb->priority);
2530
2531 /* Stop if priority has changed */
2532 if (skb->priority < priority)
2533 break;
2534
2535 skb = skb_dequeue(&chan->data_q);
2536
2537 blocks = __get_blocks(hdev, skb);
2538 if (blocks > hdev->block_cnt)
2539 return;
2540
2541 hci_conn_enter_active_mode(chan->conn,
2542 bt_cb(skb)->force_active);
2543
2544 hci_send_frame(skb);
2545 hdev->acl_last_tx = jiffies;
2546
2547 hdev->block_cnt -= blocks;
2548 quote -= blocks;
2549
2550 chan->sent += blocks;
2551 chan->conn->sent += blocks;
2552 }
2553 }
2554
2555 if (cnt != hdev->block_cnt)
2556 hci_prio_recalculate(hdev, ACL_LINK);
2557}
2558
2559static inline void hci_sched_acl(struct hci_dev *hdev)
2560{
2561 BT_DBG("%s", hdev->name);
2562
2563 if (!hci_conn_num(hdev, ACL_LINK))
2564 return;
2565
2566 switch (hdev->flow_ctl_mode) {
2567 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2568 hci_sched_acl_pkt(hdev);
2569 break;
2570
2571 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2572 hci_sched_acl_blk(hdev);
2573 break;
2574 }
2575}
2576
2577/* Schedule SCO */
2578static inline void hci_sched_sco(struct hci_dev *hdev)
2579{
2580 struct hci_conn *conn;
2581 struct sk_buff *skb;
2582 int quote;
2583
2584 BT_DBG("%s", hdev->name);
2585
2586 if (!hci_conn_num(hdev, SCO_LINK))
2587 return;
2588
2589 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
2590 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2591 BT_DBG("skb %p len %d", skb, skb->len);
2592 hci_send_frame(skb);
2593
2594 conn->sent++;
2595 if (conn->sent == ~0)
2596 conn->sent = 0;
2597 }
2598 }
2599}
2600
2601static inline void hci_sched_esco(struct hci_dev *hdev)
2602{
2603 struct hci_conn *conn;
2604 struct sk_buff *skb;
2605 int quote;
2606
2607 BT_DBG("%s", hdev->name);
2608
2609 if (!hci_conn_num(hdev, ESCO_LINK))
2610 return;
2611
2612 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) {
2613 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2614 BT_DBG("skb %p len %d", skb, skb->len);
2615 hci_send_frame(skb);
2616
2617 conn->sent++;
2618 if (conn->sent == ~0)
2619 conn->sent = 0;
2620 }
2621 }
2622}
2623
2624static inline void hci_sched_le(struct hci_dev *hdev)
2625{
2626 struct hci_chan *chan;
2627 struct sk_buff *skb;
2628 int quote, cnt, tmp;
2629
2630 BT_DBG("%s", hdev->name);
2631
2632 if (!hci_conn_num(hdev, LE_LINK))
2633 return;
2634
2635 if (!test_bit(HCI_RAW, &hdev->flags)) {
2636 /* LE tx timeout must be longer than maximum
2637 * link supervision timeout (40.9 seconds) */
2638 if (!hdev->le_cnt && hdev->le_pkts &&
2639 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2640 hci_link_tx_to(hdev, LE_LINK);
2641 }
2642
2643 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2644 tmp = cnt;
2645 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
2646 u32 priority = (skb_peek(&chan->data_q))->priority;
2647 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2648 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2649 skb->len, skb->priority);
2650
2651 /* Stop if priority has changed */
2652 if (skb->priority < priority)
2653 break;
2654
2655 skb = skb_dequeue(&chan->data_q);
2656
2657 hci_send_frame(skb);
2658 hdev->le_last_tx = jiffies;
2659
2660 cnt--;
2661 chan->sent++;
2662 chan->conn->sent++;
2663 }
2664 }
2665
2666 if (hdev->le_pkts)
2667 hdev->le_cnt = cnt;
2668 else
2669 hdev->acl_cnt = cnt;
2670
2671 if (cnt != tmp)
2672 hci_prio_recalculate(hdev, LE_LINK);
2673}
2674
2675static void hci_tx_work(struct work_struct *work)
2676{
2677 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
2678 struct sk_buff *skb;
2679
2680 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2681 hdev->sco_cnt, hdev->le_cnt);
2682
2683 /* Schedule queues and send stuff to HCI driver */
2684
2685 hci_sched_acl(hdev);
2686
2687 hci_sched_sco(hdev);
2688
2689 hci_sched_esco(hdev);
2690
2691 hci_sched_le(hdev);
2692
2693 /* Send next queued raw (unknown type) packet */
2694 while ((skb = skb_dequeue(&hdev->raw_q)))
2695 hci_send_frame(skb);
2696}
2697
2698/* ----- HCI RX task (incoming data processing) ----- */
2699
2700/* ACL data packet */
2701static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2702{
2703 struct hci_acl_hdr *hdr = (void *) skb->data;
2704 struct hci_conn *conn;
2705 __u16 handle, flags;
2706
2707 skb_pull(skb, HCI_ACL_HDR_SIZE);
2708
2709 handle = __le16_to_cpu(hdr->handle);
2710 flags = hci_flags(handle);
2711 handle = hci_handle(handle);
2712
2713 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2714
2715 hdev->stat.acl_rx++;
2716
2717 hci_dev_lock(hdev);
2718 conn = hci_conn_hash_lookup_handle(hdev, handle);
2719 hci_dev_unlock(hdev);
2720
2721 if (conn) {
2722 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
2723
2724 hci_dev_lock(hdev);
2725 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2726 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2727 mgmt_device_connected(hdev, &conn->dst, conn->type,
2728 conn->dst_type, 0, NULL, 0,
2729 conn->dev_class);
2730 hci_dev_unlock(hdev);
2731
2732 /* Send to upper protocol */
2733 l2cap_recv_acldata(conn, skb, flags);
2734 return;
2735 } else {
2736 BT_ERR("%s ACL packet for unknown connection handle %d",
2737 hdev->name, handle);
2738 }
2739
2740 kfree_skb(skb);
2741}
2742
2743/* SCO data packet */
2744static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2745{
2746 struct hci_sco_hdr *hdr = (void *) skb->data;
2747 struct hci_conn *conn;
2748 __u16 handle;
2749
2750 skb_pull(skb, HCI_SCO_HDR_SIZE);
2751
2752 handle = __le16_to_cpu(hdr->handle);
2753
2754 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2755
2756 hdev->stat.sco_rx++;
2757
2758 hci_dev_lock(hdev);
2759 conn = hci_conn_hash_lookup_handle(hdev, handle);
2760 hci_dev_unlock(hdev);
2761
2762 if (conn) {
2763 /* Send to upper protocol */
2764 sco_recv_scodata(conn, skb);
2765 return;
2766 } else {
2767 BT_ERR("%s SCO packet for unknown connection handle %d",
2768 hdev->name, handle);
2769 }
2770
2771 kfree_skb(skb);
2772}
2773
2774static void hci_rx_work(struct work_struct *work)
2775{
2776 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
2777 struct sk_buff *skb;
2778
2779 BT_DBG("%s", hdev->name);
2780
2781 while ((skb = skb_dequeue(&hdev->rx_q))) {
2782 /* Send copy to monitor */
2783 hci_send_to_monitor(hdev, skb);
2784
2785 if (atomic_read(&hdev->promisc)) {
2786 /* Send copy to the sockets */
2787 hci_send_to_sock(hdev, skb);
2788 }
2789
2790 if (test_bit(HCI_RAW, &hdev->flags)) {
2791 kfree_skb(skb);
2792 continue;
2793 }
2794
2795 if (test_bit(HCI_INIT, &hdev->flags)) {
2796 /* Don't process data packets in this states. */
2797 switch (bt_cb(skb)->pkt_type) {
2798 case HCI_ACLDATA_PKT:
2799 case HCI_SCODATA_PKT:
2800 kfree_skb(skb);
2801 continue;
2802 }
2803 }
2804
2805 /* Process frame */
2806 switch (bt_cb(skb)->pkt_type) {
2807 case HCI_EVENT_PKT:
2808 BT_DBG("%s Event packet", hdev->name);
2809 hci_event_packet(hdev, skb);
2810 break;
2811
2812 case HCI_ACLDATA_PKT:
2813 BT_DBG("%s ACL data packet", hdev->name);
2814 hci_acldata_packet(hdev, skb);
2815 break;
2816
2817 case HCI_SCODATA_PKT:
2818 BT_DBG("%s SCO data packet", hdev->name);
2819 hci_scodata_packet(hdev, skb);
2820 break;
2821
2822 default:
2823 kfree_skb(skb);
2824 break;
2825 }
2826 }
2827}
2828
2829static void hci_cmd_work(struct work_struct *work)
2830{
2831 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
2832 struct sk_buff *skb;
2833
2834 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2835
2836 /* Send queued commands */
2837 if (atomic_read(&hdev->cmd_cnt)) {
2838 skb = skb_dequeue(&hdev->cmd_q);
2839 if (!skb)
2840 return;
2841
2842 kfree_skb(hdev->sent_cmd);
2843
2844 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2845 if (hdev->sent_cmd) {
2846 atomic_dec(&hdev->cmd_cnt);
2847 hci_send_frame(skb);
2848 if (test_bit(HCI_RESET, &hdev->flags))
2849 del_timer(&hdev->cmd_timer);
2850 else
2851 mod_timer(&hdev->cmd_timer,
2852 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
2853 } else {
2854 skb_queue_head(&hdev->cmd_q, skb);
2855 queue_work(hdev->workqueue, &hdev->cmd_work);
2856 }
2857 }
2858}
2859
2860int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2861{
2862 /* General inquiry access code (GIAC) */
2863 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2864 struct hci_cp_inquiry cp;
2865
2866 BT_DBG("%s", hdev->name);
2867
2868 if (test_bit(HCI_INQUIRY, &hdev->flags))
2869 return -EINPROGRESS;
2870
2871 inquiry_cache_flush(hdev);
2872
2873 memset(&cp, 0, sizeof(cp));
2874 memcpy(&cp.lap, lap, sizeof(cp.lap));
2875 cp.length = length;
2876
2877 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2878}
2879
2880int hci_cancel_inquiry(struct hci_dev *hdev)
2881{
2882 BT_DBG("%s", hdev->name);
2883
2884 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2885 return -EALREADY;
2886
2887 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2888}
2889
2890u8 bdaddr_to_le(u8 bdaddr_type)
2891{
2892 switch (bdaddr_type) {
2893 case BDADDR_LE_PUBLIC:
2894 return ADDR_LE_DEV_PUBLIC;
2895
2896 default:
2897 /* Fallback to LE Random address type */
2898 return ADDR_LE_DEV_RANDOM;
2899 }
2900}