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staging: erofs: integrate decompression inplace
[linux/fpc-iii.git] / net / bluetooth / hci_core.c
blobb81bf53c5ac4a564491e71fcbdec4474903eaed5
1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI core. */
27
28 #include <linux/export.h>
29 #include <linux/idr.h>
30 #include <linux/rfkill.h>
31 #include <linux/debugfs.h>
32 #include <linux/crypto.h>
33 #include <linux/property.h>
34 #include <asm/unaligned.h>
35
36 #include <net/bluetooth/bluetooth.h>
37 #include <net/bluetooth/hci_core.h>
38 #include <net/bluetooth/l2cap.h>
39 #include <net/bluetooth/mgmt.h>
40
41 #include "hci_request.h"
42 #include "hci_debugfs.h"
43 #include "smp.h"
44 #include "leds.h"
45
46 static void hci_rx_work(struct work_struct *work);
47 static void hci_cmd_work(struct work_struct *work);
48 static void hci_tx_work(struct work_struct *work);
49
50 /* HCI device list */
51 LIST_HEAD(hci_dev_list);
52 DEFINE_RWLOCK(hci_dev_list_lock);
53
54 /* HCI callback list */
55 LIST_HEAD(hci_cb_list);
56 DEFINE_MUTEX(hci_cb_list_lock);
57
58 /* HCI ID Numbering */
59 static DEFINE_IDA(hci_index_ida);
60
61 /* ---- HCI debugfs entries ---- */
62
63 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
64 size_t count, loff_t *ppos)
65 {
66 struct hci_dev *hdev = file->private_data;
67 char buf[3];
68
69 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
70 buf[1] = '\n';
71 buf[2] = '\0';
72 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
73 }
74
75 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
76 size_t count, loff_t *ppos)
77 {
78 struct hci_dev *hdev = file->private_data;
79 struct sk_buff *skb;
80 bool enable;
81 int err;
82
83 if (!test_bit(HCI_UP, &hdev->flags))
84 return -ENETDOWN;
85
86 err = kstrtobool_from_user(user_buf, count, &enable);
87 if (err)
88 return err;
89
90 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
91 return -EALREADY;
92
93 hci_req_sync_lock(hdev);
94 if (enable)
95 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
96 HCI_CMD_TIMEOUT);
97 else
98 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
99 HCI_CMD_TIMEOUT);
100 hci_req_sync_unlock(hdev);
101
102 if (IS_ERR(skb))
103 return PTR_ERR(skb);
104
105 kfree_skb(skb);
106
107 hci_dev_change_flag(hdev, HCI_DUT_MODE);
108
109 return count;
110 }
111
112 static const struct file_operations dut_mode_fops = {
113 .open = simple_open,
114 .read = dut_mode_read,
115 .write = dut_mode_write,
116 .llseek = default_llseek,
117 };
118
119 static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
120 size_t count, loff_t *ppos)
121 {
122 struct hci_dev *hdev = file->private_data;
123 char buf[3];
124
125 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
126 buf[1] = '\n';
127 buf[2] = '\0';
128 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
129 }
130
131 static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
132 size_t count, loff_t *ppos)
133 {
134 struct hci_dev *hdev = file->private_data;
135 bool enable;
136 int err;
137
138 err = kstrtobool_from_user(user_buf, count, &enable);
139 if (err)
140 return err;
141
142 /* When the diagnostic flags are not persistent and the transport
143 * is not active or in user channel operation, then there is no need
144 * for the vendor callback. Instead just store the desired value and
145 * the setting will be programmed when the controller gets powered on.
146 */
147 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
148 (!test_bit(HCI_RUNNING, &hdev->flags) ||
149 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
150 goto done;
151
152 hci_req_sync_lock(hdev);
153 err = hdev->set_diag(hdev, enable);
154 hci_req_sync_unlock(hdev);
155
156 if (err < 0)
157 return err;
158
159 done:
160 if (enable)
161 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
162 else
163 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
164
165 return count;
166 }
167
168 static const struct file_operations vendor_diag_fops = {
169 .open = simple_open,
170 .read = vendor_diag_read,
171 .write = vendor_diag_write,
172 .llseek = default_llseek,
173 };
174
175 static void hci_debugfs_create_basic(struct hci_dev *hdev)
176 {
177 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
178 &dut_mode_fops);
179
180 if (hdev->set_diag)
181 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
182 &vendor_diag_fops);
183 }
184
185 static int hci_reset_req(struct hci_request *req, unsigned long opt)
186 {
187 BT_DBG("%s %ld", req->hdev->name, opt);
188
189 /* Reset device */
190 set_bit(HCI_RESET, &req->hdev->flags);
191 hci_req_add(req, HCI_OP_RESET, 0, NULL);
192 return 0;
193 }
194
195 static void bredr_init(struct hci_request *req)
196 {
197 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
198
199 /* Read Local Supported Features */
200 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
201
202 /* Read Local Version */
203 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
204
205 /* Read BD Address */
206 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
207 }
208
209 static void amp_init1(struct hci_request *req)
210 {
211 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
212
213 /* Read Local Version */
214 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
215
216 /* Read Local Supported Commands */
217 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
218
219 /* Read Local AMP Info */
220 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
221
222 /* Read Data Blk size */
223 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
224
225 /* Read Flow Control Mode */
226 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
227
228 /* Read Location Data */
229 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
230 }
231
232 static int amp_init2(struct hci_request *req)
233 {
234 /* Read Local Supported Features. Not all AMP controllers
235 * support this so it's placed conditionally in the second
236 * stage init.
237 */
238 if (req->hdev->commands[14] & 0x20)
239 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
240
241 return 0;
242 }
243
244 static int hci_init1_req(struct hci_request *req, unsigned long opt)
245 {
246 struct hci_dev *hdev = req->hdev;
247
248 BT_DBG("%s %ld", hdev->name, opt);
249
250 /* Reset */
251 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
252 hci_reset_req(req, 0);
253
254 switch (hdev->dev_type) {
255 case HCI_PRIMARY:
256 bredr_init(req);
257 break;
258 case HCI_AMP:
259 amp_init1(req);
260 break;
261 default:
262 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
263 break;
264 }
265
266 return 0;
267 }
268
269 static void bredr_setup(struct hci_request *req)
270 {
271 __le16 param;
272 __u8 flt_type;
273
274 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
275 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
276
277 /* Read Class of Device */
278 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
279
280 /* Read Local Name */
281 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
282
283 /* Read Voice Setting */
284 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
285
286 /* Read Number of Supported IAC */
287 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
288
289 /* Read Current IAC LAP */
290 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
291
292 /* Clear Event Filters */
293 flt_type = HCI_FLT_CLEAR_ALL;
294 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
295
296 /* Connection accept timeout ~20 secs */
297 param = cpu_to_le16(0x7d00);
298 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
299 }
300
301 static void le_setup(struct hci_request *req)
302 {
303 struct hci_dev *hdev = req->hdev;
304
305 /* Read LE Buffer Size */
306 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
307
308 /* Read LE Local Supported Features */
309 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
310
311 /* Read LE Supported States */
312 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
313
314 /* LE-only controllers have LE implicitly enabled */
315 if (!lmp_bredr_capable(hdev))
316 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
317 }
318
319 static void hci_setup_event_mask(struct hci_request *req)
320 {
321 struct hci_dev *hdev = req->hdev;
322
323 /* The second byte is 0xff instead of 0x9f (two reserved bits
324 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
325 * command otherwise.
326 */
327 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
328
329 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
330 * any event mask for pre 1.2 devices.
331 */
332 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
333 return;
334
335 if (lmp_bredr_capable(hdev)) {
336 events[4] |= 0x01; /* Flow Specification Complete */
337 } else {
338 /* Use a different default for LE-only devices */
339 memset(events, 0, sizeof(events));
340 events[1] |= 0x20; /* Command Complete */
341 events[1] |= 0x40; /* Command Status */
342 events[1] |= 0x80; /* Hardware Error */
343
344 /* If the controller supports the Disconnect command, enable
345 * the corresponding event. In addition enable packet flow
346 * control related events.
347 */
348 if (hdev->commands[0] & 0x20) {
349 events[0] |= 0x10; /* Disconnection Complete */
350 events[2] |= 0x04; /* Number of Completed Packets */
351 events[3] |= 0x02; /* Data Buffer Overflow */
352 }
353
354 /* If the controller supports the Read Remote Version
355 * Information command, enable the corresponding event.
356 */
357 if (hdev->commands[2] & 0x80)
358 events[1] |= 0x08; /* Read Remote Version Information
359 * Complete
360 */
361
362 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
363 events[0] |= 0x80; /* Encryption Change */
364 events[5] |= 0x80; /* Encryption Key Refresh Complete */
365 }
366 }
367
368 if (lmp_inq_rssi_capable(hdev) ||
369 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
370 events[4] |= 0x02; /* Inquiry Result with RSSI */
371
372 if (lmp_ext_feat_capable(hdev))
373 events[4] |= 0x04; /* Read Remote Extended Features Complete */
374
375 if (lmp_esco_capable(hdev)) {
376 events[5] |= 0x08; /* Synchronous Connection Complete */
377 events[5] |= 0x10; /* Synchronous Connection Changed */
378 }
379
380 if (lmp_sniffsubr_capable(hdev))
381 events[5] |= 0x20; /* Sniff Subrating */
382
383 if (lmp_pause_enc_capable(hdev))
384 events[5] |= 0x80; /* Encryption Key Refresh Complete */
385
386 if (lmp_ext_inq_capable(hdev))
387 events[5] |= 0x40; /* Extended Inquiry Result */
388
389 if (lmp_no_flush_capable(hdev))
390 events[7] |= 0x01; /* Enhanced Flush Complete */
391
392 if (lmp_lsto_capable(hdev))
393 events[6] |= 0x80; /* Link Supervision Timeout Changed */
394
395 if (lmp_ssp_capable(hdev)) {
396 events[6] |= 0x01; /* IO Capability Request */
397 events[6] |= 0x02; /* IO Capability Response */
398 events[6] |= 0x04; /* User Confirmation Request */
399 events[6] |= 0x08; /* User Passkey Request */
400 events[6] |= 0x10; /* Remote OOB Data Request */
401 events[6] |= 0x20; /* Simple Pairing Complete */
402 events[7] |= 0x04; /* User Passkey Notification */
403 events[7] |= 0x08; /* Keypress Notification */
404 events[7] |= 0x10; /* Remote Host Supported
405 * Features Notification
406 */
407 }
408
409 if (lmp_le_capable(hdev))
410 events[7] |= 0x20; /* LE Meta-Event */
411
412 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
413 }
414
415 static int hci_init2_req(struct hci_request *req, unsigned long opt)
416 {
417 struct hci_dev *hdev = req->hdev;
418
419 if (hdev->dev_type == HCI_AMP)
420 return amp_init2(req);
421
422 if (lmp_bredr_capable(hdev))
423 bredr_setup(req);
424 else
425 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
426
427 if (lmp_le_capable(hdev))
428 le_setup(req);
429
430 /* All Bluetooth 1.2 and later controllers should support the
431 * HCI command for reading the local supported commands.
432 *
433 * Unfortunately some controllers indicate Bluetooth 1.2 support,
434 * but do not have support for this command. If that is the case,
435 * the driver can quirk the behavior and skip reading the local
436 * supported commands.
437 */
438 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
439 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
440 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
441
442 if (lmp_ssp_capable(hdev)) {
443 /* When SSP is available, then the host features page
444 * should also be available as well. However some
445 * controllers list the max_page as 0 as long as SSP
446 * has not been enabled. To achieve proper debugging
447 * output, force the minimum max_page to 1 at least.
448 */
449 hdev->max_page = 0x01;
450
451 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
452 u8 mode = 0x01;
453
454 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
455 sizeof(mode), &mode);
456 } else {
457 struct hci_cp_write_eir cp;
458
459 memset(hdev->eir, 0, sizeof(hdev->eir));
460 memset(&cp, 0, sizeof(cp));
461
462 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
463 }
464 }
465
466 if (lmp_inq_rssi_capable(hdev) ||
467 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
468 u8 mode;
469
470 /* If Extended Inquiry Result events are supported, then
471 * they are clearly preferred over Inquiry Result with RSSI
472 * events.
473 */
474 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
475
476 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
477 }
478
479 if (lmp_inq_tx_pwr_capable(hdev))
480 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
481
482 if (lmp_ext_feat_capable(hdev)) {
483 struct hci_cp_read_local_ext_features cp;
484
485 cp.page = 0x01;
486 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
487 sizeof(cp), &cp);
488 }
489
490 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
491 u8 enable = 1;
492 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
493 &enable);
494 }
495
496 return 0;
497 }
498
499 static void hci_setup_link_policy(struct hci_request *req)
500 {
501 struct hci_dev *hdev = req->hdev;
502 struct hci_cp_write_def_link_policy cp;
503 u16 link_policy = 0;
504
505 if (lmp_rswitch_capable(hdev))
506 link_policy |= HCI_LP_RSWITCH;
507 if (lmp_hold_capable(hdev))
508 link_policy |= HCI_LP_HOLD;
509 if (lmp_sniff_capable(hdev))
510 link_policy |= HCI_LP_SNIFF;
511 if (lmp_park_capable(hdev))
512 link_policy |= HCI_LP_PARK;
513
514 cp.policy = cpu_to_le16(link_policy);
515 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
516 }
517
518 static void hci_set_le_support(struct hci_request *req)
519 {
520 struct hci_dev *hdev = req->hdev;
521 struct hci_cp_write_le_host_supported cp;
522
523 /* LE-only devices do not support explicit enablement */
524 if (!lmp_bredr_capable(hdev))
525 return;
526
527 memset(&cp, 0, sizeof(cp));
528
529 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
530 cp.le = 0x01;
531 cp.simul = 0x00;
532 }
533
534 if (cp.le != lmp_host_le_capable(hdev))
535 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
536 &cp);
537 }
538
539 static void hci_set_event_mask_page_2(struct hci_request *req)
540 {
541 struct hci_dev *hdev = req->hdev;
542 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
543 bool changed = false;
544
545 /* If Connectionless Slave Broadcast master role is supported
546 * enable all necessary events for it.
547 */
548 if (lmp_csb_master_capable(hdev)) {
549 events[1] |= 0x40; /* Triggered Clock Capture */
550 events[1] |= 0x80; /* Synchronization Train Complete */
551 events[2] |= 0x10; /* Slave Page Response Timeout */
552 events[2] |= 0x20; /* CSB Channel Map Change */
553 changed = true;
554 }
555
556 /* If Connectionless Slave Broadcast slave role is supported
557 * enable all necessary events for it.
558 */
559 if (lmp_csb_slave_capable(hdev)) {
560 events[2] |= 0x01; /* Synchronization Train Received */
561 events[2] |= 0x02; /* CSB Receive */
562 events[2] |= 0x04; /* CSB Timeout */
563 events[2] |= 0x08; /* Truncated Page Complete */
564 changed = true;
565 }
566
567 /* Enable Authenticated Payload Timeout Expired event if supported */
568 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
569 events[2] |= 0x80;
570 changed = true;
571 }
572
573 /* Some Broadcom based controllers indicate support for Set Event
574 * Mask Page 2 command, but then actually do not support it. Since
575 * the default value is all bits set to zero, the command is only
576 * required if the event mask has to be changed. In case no change
577 * to the event mask is needed, skip this command.
578 */
579 if (changed)
580 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
581 sizeof(events), events);
582 }
583
584 static int hci_init3_req(struct hci_request *req, unsigned long opt)
585 {
586 struct hci_dev *hdev = req->hdev;
587 u8 p;
588
589 hci_setup_event_mask(req);
590
591 if (hdev->commands[6] & 0x20 &&
592 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
593 struct hci_cp_read_stored_link_key cp;
594
595 bacpy(&cp.bdaddr, BDADDR_ANY);
596 cp.read_all = 0x01;
597 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
598 }
599
600 if (hdev->commands[5] & 0x10)
601 hci_setup_link_policy(req);
602
603 if (hdev->commands[8] & 0x01)
604 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
605
606 /* Some older Broadcom based Bluetooth 1.2 controllers do not
607 * support the Read Page Scan Type command. Check support for
608 * this command in the bit mask of supported commands.
609 */
610 if (hdev->commands[13] & 0x01)
611 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
612
613 if (lmp_le_capable(hdev)) {
614 u8 events[8];
615
616 memset(events, 0, sizeof(events));
617
618 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
619 events[0] |= 0x10; /* LE Long Term Key Request */
620
621 /* If controller supports the Connection Parameters Request
622 * Link Layer Procedure, enable the corresponding event.
623 */
624 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
625 events[0] |= 0x20; /* LE Remote Connection
626 * Parameter Request
627 */
628
629 /* If the controller supports the Data Length Extension
630 * feature, enable the corresponding event.
631 */
632 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
633 events[0] |= 0x40; /* LE Data Length Change */
634
635 /* If the controller supports Extended Scanner Filter
636 * Policies, enable the correspondig event.
637 */
638 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
639 events[1] |= 0x04; /* LE Direct Advertising
640 * Report
641 */
642
643 /* If the controller supports Channel Selection Algorithm #2
644 * feature, enable the corresponding event.
645 */
646 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
647 events[2] |= 0x08; /* LE Channel Selection
648 * Algorithm
649 */
650
651 /* If the controller supports the LE Set Scan Enable command,
652 * enable the corresponding advertising report event.
653 */
654 if (hdev->commands[26] & 0x08)
655 events[0] |= 0x02; /* LE Advertising Report */
656
657 /* If the controller supports the LE Create Connection
658 * command, enable the corresponding event.
659 */
660 if (hdev->commands[26] & 0x10)
661 events[0] |= 0x01; /* LE Connection Complete */
662
663 /* If the controller supports the LE Connection Update
664 * command, enable the corresponding event.
665 */
666 if (hdev->commands[27] & 0x04)
667 events[0] |= 0x04; /* LE Connection Update
668 * Complete
669 */
670
671 /* If the controller supports the LE Read Remote Used Features
672 * command, enable the corresponding event.
673 */
674 if (hdev->commands[27] & 0x20)
675 events[0] |= 0x08; /* LE Read Remote Used
676 * Features Complete
677 */
678
679 /* If the controller supports the LE Read Local P-256
680 * Public Key command, enable the corresponding event.
681 */
682 if (hdev->commands[34] & 0x02)
683 events[0] |= 0x80; /* LE Read Local P-256
684 * Public Key Complete
685 */
686
687 /* If the controller supports the LE Generate DHKey
688 * command, enable the corresponding event.
689 */
690 if (hdev->commands[34] & 0x04)
691 events[1] |= 0x01; /* LE Generate DHKey Complete */
692
693 /* If the controller supports the LE Set Default PHY or
694 * LE Set PHY commands, enable the corresponding event.
695 */
696 if (hdev->commands[35] & (0x20 | 0x40))
697 events[1] |= 0x08; /* LE PHY Update Complete */
698
699 /* If the controller supports LE Set Extended Scan Parameters
700 * and LE Set Extended Scan Enable commands, enable the
701 * corresponding event.
702 */
703 if (use_ext_scan(hdev))
704 events[1] |= 0x10; /* LE Extended Advertising
705 * Report
706 */
707
708 /* If the controller supports the LE Extended Create Connection
709 * command, enable the corresponding event.
710 */
711 if (use_ext_conn(hdev))
712 events[1] |= 0x02; /* LE Enhanced Connection
713 * Complete
714 */
715
716 /* If the controller supports the LE Extended Advertising
717 * command, enable the corresponding event.
718 */
719 if (ext_adv_capable(hdev))
720 events[2] |= 0x02; /* LE Advertising Set
721 * Terminated
722 */
723
724 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
725 events);
726
727 /* Read LE Advertising Channel TX Power */
728 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
729 /* HCI TS spec forbids mixing of legacy and extended
730 * advertising commands wherein READ_ADV_TX_POWER is
731 * also included. So do not call it if extended adv
732 * is supported otherwise controller will return
733 * COMMAND_DISALLOWED for extended commands.
734 */
735 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
736 }
737
738 if (hdev->commands[26] & 0x40) {
739 /* Read LE White List Size */
740 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
741 0, NULL);
742 }
743
744 if (hdev->commands[26] & 0x80) {
745 /* Clear LE White List */
746 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
747 }
748
749 if (hdev->commands[34] & 0x40) {
750 /* Read LE Resolving List Size */
751 hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
752 0, NULL);
753 }
754
755 if (hdev->commands[34] & 0x20) {
756 /* Clear LE Resolving List */
757 hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
758 }
759
760 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
761 /* Read LE Maximum Data Length */
762 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
763
764 /* Read LE Suggested Default Data Length */
765 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
766 }
767
768 if (ext_adv_capable(hdev)) {
769 /* Read LE Number of Supported Advertising Sets */
770 hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
771 0, NULL);
772 }
773
774 hci_set_le_support(req);
775 }
776
777 /* Read features beyond page 1 if available */
778 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
779 struct hci_cp_read_local_ext_features cp;
780
781 cp.page = p;
782 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
783 sizeof(cp), &cp);
784 }
785
786 return 0;
787 }
788
789 static int hci_init4_req(struct hci_request *req, unsigned long opt)
790 {
791 struct hci_dev *hdev = req->hdev;
792
793 /* Some Broadcom based Bluetooth controllers do not support the
794 * Delete Stored Link Key command. They are clearly indicating its
795 * absence in the bit mask of supported commands.
796 *
797 * Check the supported commands and only if the the command is marked
798 * as supported send it. If not supported assume that the controller
799 * does not have actual support for stored link keys which makes this
800 * command redundant anyway.
801 *
802 * Some controllers indicate that they support handling deleting
803 * stored link keys, but they don't. The quirk lets a driver
804 * just disable this command.
805 */
806 if (hdev->commands[6] & 0x80 &&
807 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
808 struct hci_cp_delete_stored_link_key cp;
809
810 bacpy(&cp.bdaddr, BDADDR_ANY);
811 cp.delete_all = 0x01;
812 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
813 sizeof(cp), &cp);
814 }
815
816 /* Set event mask page 2 if the HCI command for it is supported */
817 if (hdev->commands[22] & 0x04)
818 hci_set_event_mask_page_2(req);
819
820 /* Read local codec list if the HCI command is supported */
821 if (hdev->commands[29] & 0x20)
822 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
823
824 /* Get MWS transport configuration if the HCI command is supported */
825 if (hdev->commands[30] & 0x08)
826 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
827
828 /* Check for Synchronization Train support */
829 if (lmp_sync_train_capable(hdev))
830 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
831
832 /* Enable Secure Connections if supported and configured */
833 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
834 bredr_sc_enabled(hdev)) {
835 u8 support = 0x01;
836
837 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
838 sizeof(support), &support);
839 }
840
841 /* Set Suggested Default Data Length to maximum if supported */
842 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
843 struct hci_cp_le_write_def_data_len cp;
844
845 cp.tx_len = hdev->le_max_tx_len;
846 cp.tx_time = hdev->le_max_tx_time;
847 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
848 }
849
850 /* Set Default PHY parameters if command is supported */
851 if (hdev->commands[35] & 0x20) {
852 struct hci_cp_le_set_default_phy cp;
853
854 cp.all_phys = 0x00;
855 cp.tx_phys = hdev->le_tx_def_phys;
856 cp.rx_phys = hdev->le_rx_def_phys;
857
858 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
859 }
860
861 return 0;
862 }
863
864 static int __hci_init(struct hci_dev *hdev)
865 {
866 int err;
867
868 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
869 if (err < 0)
870 return err;
871
872 if (hci_dev_test_flag(hdev, HCI_SETUP))
873 hci_debugfs_create_basic(hdev);
874
875 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
876 if (err < 0)
877 return err;
878
879 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
880 * BR/EDR/LE type controllers. AMP controllers only need the
881 * first two stages of init.
882 */
883 if (hdev->dev_type != HCI_PRIMARY)
884 return 0;
885
886 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
887 if (err < 0)
888 return err;
889
890 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
891 if (err < 0)
892 return err;
893
894 /* This function is only called when the controller is actually in
895 * configured state. When the controller is marked as unconfigured,
896 * this initialization procedure is not run.
897 *
898 * It means that it is possible that a controller runs through its
899 * setup phase and then discovers missing settings. If that is the
900 * case, then this function will not be called. It then will only
901 * be called during the config phase.
902 *
903 * So only when in setup phase or config phase, create the debugfs
904 * entries and register the SMP channels.
905 */
906 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
907 !hci_dev_test_flag(hdev, HCI_CONFIG))
908 return 0;
909
910 hci_debugfs_create_common(hdev);
911
912 if (lmp_bredr_capable(hdev))
913 hci_debugfs_create_bredr(hdev);
914
915 if (lmp_le_capable(hdev))
916 hci_debugfs_create_le(hdev);
917
918 return 0;
919 }
920
921 static int hci_init0_req(struct hci_request *req, unsigned long opt)
922 {
923 struct hci_dev *hdev = req->hdev;
924
925 BT_DBG("%s %ld", hdev->name, opt);
926
927 /* Reset */
928 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
929 hci_reset_req(req, 0);
930
931 /* Read Local Version */
932 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
933
934 /* Read BD Address */
935 if (hdev->set_bdaddr)
936 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
937
938 return 0;
939 }
940
941 static int __hci_unconf_init(struct hci_dev *hdev)
942 {
943 int err;
944
945 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
946 return 0;
947
948 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
949 if (err < 0)
950 return err;
951
952 if (hci_dev_test_flag(hdev, HCI_SETUP))
953 hci_debugfs_create_basic(hdev);
954
955 return 0;
956 }
957
958 static int hci_scan_req(struct hci_request *req, unsigned long opt)
959 {
960 __u8 scan = opt;
961
962 BT_DBG("%s %x", req->hdev->name, scan);
963
964 /* Inquiry and Page scans */
965 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
966 return 0;
967 }
968
969 static int hci_auth_req(struct hci_request *req, unsigned long opt)
970 {
971 __u8 auth = opt;
972
973 BT_DBG("%s %x", req->hdev->name, auth);
974
975 /* Authentication */
976 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
977 return 0;
978 }
979
980 static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
981 {
982 __u8 encrypt = opt;
983
984 BT_DBG("%s %x", req->hdev->name, encrypt);
985
986 /* Encryption */
987 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
988 return 0;
989 }
990
991 static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
992 {
993 __le16 policy = cpu_to_le16(opt);
994
995 BT_DBG("%s %x", req->hdev->name, policy);
996
997 /* Default link policy */
998 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
999 return 0;
1000 }
1001
1002 /* Get HCI device by index.
1003 * Device is held on return. */
1004 struct hci_dev *hci_dev_get(int index)
1005 {
1006 struct hci_dev *hdev = NULL, *d;
1007
1008 BT_DBG("%d", index);
1009
1010 if (index < 0)
1011 return NULL;
1012
1013 read_lock(&hci_dev_list_lock);
1014 list_for_each_entry(d, &hci_dev_list, list) {
1015 if (d->id == index) {
1016 hdev = hci_dev_hold(d);
1017 break;
1018 }
1019 }
1020 read_unlock(&hci_dev_list_lock);
1021 return hdev;
1022 }
1023
1024 /* ---- Inquiry support ---- */
1025
1026 bool hci_discovery_active(struct hci_dev *hdev)
1027 {
1028 struct discovery_state *discov = &hdev->discovery;
1029
1030 switch (discov->state) {
1031 case DISCOVERY_FINDING:
1032 case DISCOVERY_RESOLVING:
1033 return true;
1034
1035 default:
1036 return false;
1037 }
1038 }
1039
1040 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1041 {
1042 int old_state = hdev->discovery.state;
1043
1044 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1045
1046 if (old_state == state)
1047 return;
1048
1049 hdev->discovery.state = state;
1050
1051 switch (state) {
1052 case DISCOVERY_STOPPED:
1053 hci_update_background_scan(hdev);
1054
1055 if (old_state != DISCOVERY_STARTING)
1056 mgmt_discovering(hdev, 0);
1057 break;
1058 case DISCOVERY_STARTING:
1059 break;
1060 case DISCOVERY_FINDING:
1061 mgmt_discovering(hdev, 1);
1062 break;
1063 case DISCOVERY_RESOLVING:
1064 break;
1065 case DISCOVERY_STOPPING:
1066 break;
1067 }
1068 }
1069
1070 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1071 {
1072 struct discovery_state *cache = &hdev->discovery;
1073 struct inquiry_entry *p, *n;
1074
1075 list_for_each_entry_safe(p, n, &cache->all, all) {
1076 list_del(&p->all);
1077 kfree(p);
1078 }
1079
1080 INIT_LIST_HEAD(&cache->unknown);
1081 INIT_LIST_HEAD(&cache->resolve);
1082 }
1083
1084 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1085 bdaddr_t *bdaddr)
1086 {
1087 struct discovery_state *cache = &hdev->discovery;
1088 struct inquiry_entry *e;
1089
1090 BT_DBG("cache %p, %pMR", cache, bdaddr);
1091
1092 list_for_each_entry(e, &cache->all, all) {
1093 if (!bacmp(&e->data.bdaddr, bdaddr))
1094 return e;
1095 }
1096
1097 return NULL;
1098 }
1099
1100 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1101 bdaddr_t *bdaddr)
1102 {
1103 struct discovery_state *cache = &hdev->discovery;
1104 struct inquiry_entry *e;
1105
1106 BT_DBG("cache %p, %pMR", cache, bdaddr);
1107
1108 list_for_each_entry(e, &cache->unknown, list) {
1109 if (!bacmp(&e->data.bdaddr, bdaddr))
1110 return e;
1111 }
1112
1113 return NULL;
1114 }
1115
1116 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1117 bdaddr_t *bdaddr,
1118 int state)
1119 {
1120 struct discovery_state *cache = &hdev->discovery;
1121 struct inquiry_entry *e;
1122
1123 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1124
1125 list_for_each_entry(e, &cache->resolve, list) {
1126 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1127 return e;
1128 if (!bacmp(&e->data.bdaddr, bdaddr))
1129 return e;
1130 }
1131
1132 return NULL;
1133 }
1134
1135 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1136 struct inquiry_entry *ie)
1137 {
1138 struct discovery_state *cache = &hdev->discovery;
1139 struct list_head *pos = &cache->resolve;
1140 struct inquiry_entry *p;
1141
1142 list_del(&ie->list);
1143
1144 list_for_each_entry(p, &cache->resolve, list) {
1145 if (p->name_state != NAME_PENDING &&
1146 abs(p->data.rssi) >= abs(ie->data.rssi))
1147 break;
1148 pos = &p->list;
1149 }
1150
1151 list_add(&ie->list, pos);
1152 }
1153
1154 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1155 bool name_known)
1156 {
1157 struct discovery_state *cache = &hdev->discovery;
1158 struct inquiry_entry *ie;
1159 u32 flags = 0;
1160
1161 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1162
1163 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1164
1165 if (!data->ssp_mode)
1166 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1167
1168 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1169 if (ie) {
1170 if (!ie->data.ssp_mode)
1171 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1172
1173 if (ie->name_state == NAME_NEEDED &&
1174 data->rssi != ie->data.rssi) {
1175 ie->data.rssi = data->rssi;
1176 hci_inquiry_cache_update_resolve(hdev, ie);
1177 }
1178
1179 goto update;
1180 }
1181
1182 /* Entry not in the cache. Add new one. */
1183 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1184 if (!ie) {
1185 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1186 goto done;
1187 }
1188
1189 list_add(&ie->all, &cache->all);
1190
1191 if (name_known) {
1192 ie->name_state = NAME_KNOWN;
1193 } else {
1194 ie->name_state = NAME_NOT_KNOWN;
1195 list_add(&ie->list, &cache->unknown);
1196 }
1197
1198 update:
1199 if (name_known && ie->name_state != NAME_KNOWN &&
1200 ie->name_state != NAME_PENDING) {
1201 ie->name_state = NAME_KNOWN;
1202 list_del(&ie->list);
1203 }
1204
1205 memcpy(&ie->data, data, sizeof(*data));
1206 ie->timestamp = jiffies;
1207 cache->timestamp = jiffies;
1208
1209 if (ie->name_state == NAME_NOT_KNOWN)
1210 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1211
1212 done:
1213 return flags;
1214 }
1215
1216 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1217 {
1218 struct discovery_state *cache = &hdev->discovery;
1219 struct inquiry_info *info = (struct inquiry_info *) buf;
1220 struct inquiry_entry *e;
1221 int copied = 0;
1222
1223 list_for_each_entry(e, &cache->all, all) {
1224 struct inquiry_data *data = &e->data;
1225
1226 if (copied >= num)
1227 break;
1228
1229 bacpy(&info->bdaddr, &data->bdaddr);
1230 info->pscan_rep_mode = data->pscan_rep_mode;
1231 info->pscan_period_mode = data->pscan_period_mode;
1232 info->pscan_mode = data->pscan_mode;
1233 memcpy(info->dev_class, data->dev_class, 3);
1234 info->clock_offset = data->clock_offset;
1235
1236 info++;
1237 copied++;
1238 }
1239
1240 BT_DBG("cache %p, copied %d", cache, copied);
1241 return copied;
1242 }
1243
1244 static int hci_inq_req(struct hci_request *req, unsigned long opt)
1245 {
1246 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1247 struct hci_dev *hdev = req->hdev;
1248 struct hci_cp_inquiry cp;
1249
1250 BT_DBG("%s", hdev->name);
1251
1252 if (test_bit(HCI_INQUIRY, &hdev->flags))
1253 return 0;
1254
1255 /* Start Inquiry */
1256 memcpy(&cp.lap, &ir->lap, 3);
1257 cp.length = ir->length;
1258 cp.num_rsp = ir->num_rsp;
1259 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1260
1261 return 0;
1262 }
1263
1264 int hci_inquiry(void __user *arg)
1265 {
1266 __u8 __user *ptr = arg;
1267 struct hci_inquiry_req ir;
1268 struct hci_dev *hdev;
1269 int err = 0, do_inquiry = 0, max_rsp;
1270 long timeo;
1271 __u8 *buf;
1272
1273 if (copy_from_user(&ir, ptr, sizeof(ir)))
1274 return -EFAULT;
1275
1276 hdev = hci_dev_get(ir.dev_id);
1277 if (!hdev)
1278 return -ENODEV;
1279
1280 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1281 err = -EBUSY;
1282 goto done;
1283 }
1284
1285 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1286 err = -EOPNOTSUPP;
1287 goto done;
1288 }
1289
1290 if (hdev->dev_type != HCI_PRIMARY) {
1291 err = -EOPNOTSUPP;
1292 goto done;
1293 }
1294
1295 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1296 err = -EOPNOTSUPP;
1297 goto done;
1298 }
1299
1300 hci_dev_lock(hdev);
1301 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1302 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1303 hci_inquiry_cache_flush(hdev);
1304 do_inquiry = 1;
1305 }
1306 hci_dev_unlock(hdev);
1307
1308 timeo = ir.length * msecs_to_jiffies(2000);
1309
1310 if (do_inquiry) {
1311 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1312 timeo, NULL);
1313 if (err < 0)
1314 goto done;
1315
1316 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1317 * cleared). If it is interrupted by a signal, return -EINTR.
1318 */
1319 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1320 TASK_INTERRUPTIBLE))
1321 return -EINTR;
1322 }
1323
1324 /* for unlimited number of responses we will use buffer with
1325 * 255 entries
1326 */
1327 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1328
1329 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1330 * copy it to the user space.
1331 */
1332 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1333 if (!buf) {
1334 err = -ENOMEM;
1335 goto done;
1336 }
1337
1338 hci_dev_lock(hdev);
1339 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1340 hci_dev_unlock(hdev);
1341
1342 BT_DBG("num_rsp %d", ir.num_rsp);
1343
1344 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1345 ptr += sizeof(ir);
1346 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1347 ir.num_rsp))
1348 err = -EFAULT;
1349 } else
1350 err = -EFAULT;
1351
1352 kfree(buf);
1353
1354 done:
1355 hci_dev_put(hdev);
1356 return err;
1357 }
1358
1359 /**
1360 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
1361 * (BD_ADDR) for a HCI device from
1362 * a firmware node property.
1363 * @hdev: The HCI device
1364 *
1365 * Search the firmware node for 'local-bd-address'.
1366 *
1367 * All-zero BD addresses are rejected, because those could be properties
1368 * that exist in the firmware tables, but were not updated by the firmware. For
1369 * example, the DTS could define 'local-bd-address', with zero BD addresses.
1370 */
1371 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
1372 {
1373 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
1374 bdaddr_t ba;
1375 int ret;
1376
1377 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
1378 (u8 *)&ba, sizeof(ba));
1379 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
1380 return;
1381
1382 bacpy(&hdev->public_addr, &ba);
1383 }
1384
1385 static int hci_dev_do_open(struct hci_dev *hdev)
1386 {
1387 int ret = 0;
1388
1389 BT_DBG("%s %p", hdev->name, hdev);
1390
1391 hci_req_sync_lock(hdev);
1392
1393 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1394 ret = -ENODEV;
1395 goto done;
1396 }
1397
1398 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1399 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1400 /* Check for rfkill but allow the HCI setup stage to
1401 * proceed (which in itself doesn't cause any RF activity).
1402 */
1403 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1404 ret = -ERFKILL;
1405 goto done;
1406 }
1407
1408 /* Check for valid public address or a configured static
1409 * random adddress, but let the HCI setup proceed to
1410 * be able to determine if there is a public address
1411 * or not.
1412 *
1413 * In case of user channel usage, it is not important
1414 * if a public address or static random address is
1415 * available.
1416 *
1417 * This check is only valid for BR/EDR controllers
1418 * since AMP controllers do not have an address.
1419 */
1420 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1421 hdev->dev_type == HCI_PRIMARY &&
1422 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1423 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1424 ret = -EADDRNOTAVAIL;
1425 goto done;
1426 }
1427 }
1428
1429 if (test_bit(HCI_UP, &hdev->flags)) {
1430 ret = -EALREADY;
1431 goto done;
1432 }
1433
1434 if (hdev->open(hdev)) {
1435 ret = -EIO;
1436 goto done;
1437 }
1438
1439 set_bit(HCI_RUNNING, &hdev->flags);
1440 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1441
1442 atomic_set(&hdev->cmd_cnt, 1);
1443 set_bit(HCI_INIT, &hdev->flags);
1444
1445 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1446 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1447 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1448
1449 if (hdev->setup)
1450 ret = hdev->setup(hdev);
1451
1452 if (ret)
1453 goto setup_failed;
1454
1455 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
1456 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
1457 hci_dev_get_bd_addr_from_property(hdev);
1458
1459 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1460 hdev->set_bdaddr)
1461 ret = hdev->set_bdaddr(hdev,
1462 &hdev->public_addr);
1463 }
1464
1465 setup_failed:
1466 /* The transport driver can set these quirks before
1467 * creating the HCI device or in its setup callback.
1468 *
1469 * In case any of them is set, the controller has to
1470 * start up as unconfigured.
1471 */
1472 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1473 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1474 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1475
1476 /* For an unconfigured controller it is required to
1477 * read at least the version information provided by
1478 * the Read Local Version Information command.
1479 *
1480 * If the set_bdaddr driver callback is provided, then
1481 * also the original Bluetooth public device address
1482 * will be read using the Read BD Address command.
1483 */
1484 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1485 ret = __hci_unconf_init(hdev);
1486 }
1487
1488 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1489 /* If public address change is configured, ensure that
1490 * the address gets programmed. If the driver does not
1491 * support changing the public address, fail the power
1492 * on procedure.
1493 */
1494 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1495 hdev->set_bdaddr)
1496 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1497 else
1498 ret = -EADDRNOTAVAIL;
1499 }
1500
1501 if (!ret) {
1502 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1503 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1504 ret = __hci_init(hdev);
1505 if (!ret && hdev->post_init)
1506 ret = hdev->post_init(hdev);
1507 }
1508 }
1509
1510 /* If the HCI Reset command is clearing all diagnostic settings,
1511 * then they need to be reprogrammed after the init procedure
1512 * completed.
1513 */
1514 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1515 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1516 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1517 ret = hdev->set_diag(hdev, true);
1518
1519 clear_bit(HCI_INIT, &hdev->flags);
1520
1521 if (!ret) {
1522 hci_dev_hold(hdev);
1523 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1524 hci_adv_instances_set_rpa_expired(hdev, true);
1525 set_bit(HCI_UP, &hdev->flags);
1526 hci_sock_dev_event(hdev, HCI_DEV_UP);
1527 hci_leds_update_powered(hdev, true);
1528 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1529 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1530 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1531 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1532 hci_dev_test_flag(hdev, HCI_MGMT) &&
1533 hdev->dev_type == HCI_PRIMARY) {
1534 ret = __hci_req_hci_power_on(hdev);
1535 mgmt_power_on(hdev, ret);
1536 }
1537 } else {
1538 /* Init failed, cleanup */
1539 flush_work(&hdev->tx_work);
1540 flush_work(&hdev->cmd_work);
1541 flush_work(&hdev->rx_work);
1542
1543 skb_queue_purge(&hdev->cmd_q);
1544 skb_queue_purge(&hdev->rx_q);
1545
1546 if (hdev->flush)
1547 hdev->flush(hdev);
1548
1549 if (hdev->sent_cmd) {
1550 kfree_skb(hdev->sent_cmd);
1551 hdev->sent_cmd = NULL;
1552 }
1553
1554 clear_bit(HCI_RUNNING, &hdev->flags);
1555 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1556
1557 hdev->close(hdev);
1558 hdev->flags &= BIT(HCI_RAW);
1559 }
1560
1561 done:
1562 hci_req_sync_unlock(hdev);
1563 return ret;
1564 }
1565
1566 /* ---- HCI ioctl helpers ---- */
1567
1568 int hci_dev_open(__u16 dev)
1569 {
1570 struct hci_dev *hdev;
1571 int err;
1572
1573 hdev = hci_dev_get(dev);
1574 if (!hdev)
1575 return -ENODEV;
1576
1577 /* Devices that are marked as unconfigured can only be powered
1578 * up as user channel. Trying to bring them up as normal devices
1579 * will result into a failure. Only user channel operation is
1580 * possible.
1581 *
1582 * When this function is called for a user channel, the flag
1583 * HCI_USER_CHANNEL will be set first before attempting to
1584 * open the device.
1585 */
1586 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1587 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1588 err = -EOPNOTSUPP;
1589 goto done;
1590 }
1591
1592 /* We need to ensure that no other power on/off work is pending
1593 * before proceeding to call hci_dev_do_open. This is
1594 * particularly important if the setup procedure has not yet
1595 * completed.
1596 */
1597 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1598 cancel_delayed_work(&hdev->power_off);
1599
1600 /* After this call it is guaranteed that the setup procedure
1601 * has finished. This means that error conditions like RFKILL
1602 * or no valid public or static random address apply.
1603 */
1604 flush_workqueue(hdev->req_workqueue);
1605
1606 /* For controllers not using the management interface and that
1607 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1608 * so that pairing works for them. Once the management interface
1609 * is in use this bit will be cleared again and userspace has
1610 * to explicitly enable it.
1611 */
1612 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1613 !hci_dev_test_flag(hdev, HCI_MGMT))
1614 hci_dev_set_flag(hdev, HCI_BONDABLE);
1615
1616 err = hci_dev_do_open(hdev);
1617
1618 done:
1619 hci_dev_put(hdev);
1620 return err;
1621 }
1622
1623 /* This function requires the caller holds hdev->lock */
1624 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1625 {
1626 struct hci_conn_params *p;
1627
1628 list_for_each_entry(p, &hdev->le_conn_params, list) {
1629 if (p->conn) {
1630 hci_conn_drop(p->conn);
1631 hci_conn_put(p->conn);
1632 p->conn = NULL;
1633 }
1634 list_del_init(&p->action);
1635 }
1636
1637 BT_DBG("All LE pending actions cleared");
1638 }
1639
1640 int hci_dev_do_close(struct hci_dev *hdev)
1641 {
1642 bool auto_off;
1643
1644 BT_DBG("%s %p", hdev->name, hdev);
1645
1646 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1647 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1648 test_bit(HCI_UP, &hdev->flags)) {
1649 /* Execute vendor specific shutdown routine */
1650 if (hdev->shutdown)
1651 hdev->shutdown(hdev);
1652 }
1653
1654 cancel_delayed_work(&hdev->power_off);
1655
1656 hci_request_cancel_all(hdev);
1657 hci_req_sync_lock(hdev);
1658
1659 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1660 cancel_delayed_work_sync(&hdev->cmd_timer);
1661 hci_req_sync_unlock(hdev);
1662 return 0;
1663 }
1664
1665 hci_leds_update_powered(hdev, false);
1666
1667 /* Flush RX and TX works */
1668 flush_work(&hdev->tx_work);
1669 flush_work(&hdev->rx_work);
1670
1671 if (hdev->discov_timeout > 0) {
1672 hdev->discov_timeout = 0;
1673 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1674 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1675 }
1676
1677 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1678 cancel_delayed_work(&hdev->service_cache);
1679
1680 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
1681 struct adv_info *adv_instance;
1682
1683 cancel_delayed_work_sync(&hdev->rpa_expired);
1684
1685 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
1686 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1687 }
1688
1689 /* Avoid potential lockdep warnings from the *_flush() calls by
1690 * ensuring the workqueue is empty up front.
1691 */
1692 drain_workqueue(hdev->workqueue);
1693
1694 hci_dev_lock(hdev);
1695
1696 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1697
1698 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1699
1700 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1701 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1702 hci_dev_test_flag(hdev, HCI_MGMT))
1703 __mgmt_power_off(hdev);
1704
1705 hci_inquiry_cache_flush(hdev);
1706 hci_pend_le_actions_clear(hdev);
1707 hci_conn_hash_flush(hdev);
1708 hci_dev_unlock(hdev);
1709
1710 smp_unregister(hdev);
1711
1712 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1713
1714 if (hdev->flush)
1715 hdev->flush(hdev);
1716
1717 /* Reset device */
1718 skb_queue_purge(&hdev->cmd_q);
1719 atomic_set(&hdev->cmd_cnt, 1);
1720 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1721 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1722 set_bit(HCI_INIT, &hdev->flags);
1723 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1724 clear_bit(HCI_INIT, &hdev->flags);
1725 }
1726
1727 /* flush cmd work */
1728 flush_work(&hdev->cmd_work);
1729
1730 /* Drop queues */
1731 skb_queue_purge(&hdev->rx_q);
1732 skb_queue_purge(&hdev->cmd_q);
1733 skb_queue_purge(&hdev->raw_q);
1734
1735 /* Drop last sent command */
1736 if (hdev->sent_cmd) {
1737 cancel_delayed_work_sync(&hdev->cmd_timer);
1738 kfree_skb(hdev->sent_cmd);
1739 hdev->sent_cmd = NULL;
1740 }
1741
1742 clear_bit(HCI_RUNNING, &hdev->flags);
1743 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1744
1745 /* After this point our queues are empty
1746 * and no tasks are scheduled. */
1747 hdev->close(hdev);
1748
1749 /* Clear flags */
1750 hdev->flags &= BIT(HCI_RAW);
1751 hci_dev_clear_volatile_flags(hdev);
1752
1753 /* Controller radio is available but is currently powered down */
1754 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1755
1756 memset(hdev->eir, 0, sizeof(hdev->eir));
1757 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1758 bacpy(&hdev->random_addr, BDADDR_ANY);
1759
1760 hci_req_sync_unlock(hdev);
1761
1762 hci_dev_put(hdev);
1763 return 0;
1764 }
1765
1766 int hci_dev_close(__u16 dev)
1767 {
1768 struct hci_dev *hdev;
1769 int err;
1770
1771 hdev = hci_dev_get(dev);
1772 if (!hdev)
1773 return -ENODEV;
1774
1775 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1776 err = -EBUSY;
1777 goto done;
1778 }
1779
1780 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1781 cancel_delayed_work(&hdev->power_off);
1782
1783 err = hci_dev_do_close(hdev);
1784
1785 done:
1786 hci_dev_put(hdev);
1787 return err;
1788 }
1789
1790 static int hci_dev_do_reset(struct hci_dev *hdev)
1791 {
1792 int ret;
1793
1794 BT_DBG("%s %p", hdev->name, hdev);
1795
1796 hci_req_sync_lock(hdev);
1797
1798 /* Drop queues */
1799 skb_queue_purge(&hdev->rx_q);
1800 skb_queue_purge(&hdev->cmd_q);
1801
1802 /* Avoid potential lockdep warnings from the *_flush() calls by
1803 * ensuring the workqueue is empty up front.
1804 */
1805 drain_workqueue(hdev->workqueue);
1806
1807 hci_dev_lock(hdev);
1808 hci_inquiry_cache_flush(hdev);
1809 hci_conn_hash_flush(hdev);
1810 hci_dev_unlock(hdev);
1811
1812 if (hdev->flush)
1813 hdev->flush(hdev);
1814
1815 atomic_set(&hdev->cmd_cnt, 1);
1816 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1817
1818 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1819
1820 hci_req_sync_unlock(hdev);
1821 return ret;
1822 }
1823
1824 int hci_dev_reset(__u16 dev)
1825 {
1826 struct hci_dev *hdev;
1827 int err;
1828
1829 hdev = hci_dev_get(dev);
1830 if (!hdev)
1831 return -ENODEV;
1832
1833 if (!test_bit(HCI_UP, &hdev->flags)) {
1834 err = -ENETDOWN;
1835 goto done;
1836 }
1837
1838 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1839 err = -EBUSY;
1840 goto done;
1841 }
1842
1843 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1844 err = -EOPNOTSUPP;
1845 goto done;
1846 }
1847
1848 err = hci_dev_do_reset(hdev);
1849
1850 done:
1851 hci_dev_put(hdev);
1852 return err;
1853 }
1854
1855 int hci_dev_reset_stat(__u16 dev)
1856 {
1857 struct hci_dev *hdev;
1858 int ret = 0;
1859
1860 hdev = hci_dev_get(dev);
1861 if (!hdev)
1862 return -ENODEV;
1863
1864 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1865 ret = -EBUSY;
1866 goto done;
1867 }
1868
1869 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1870 ret = -EOPNOTSUPP;
1871 goto done;
1872 }
1873
1874 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1875
1876 done:
1877 hci_dev_put(hdev);
1878 return ret;
1879 }
1880
1881 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1882 {
1883 bool conn_changed, discov_changed;
1884
1885 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1886
1887 if ((scan & SCAN_PAGE))
1888 conn_changed = !hci_dev_test_and_set_flag(hdev,
1889 HCI_CONNECTABLE);
1890 else
1891 conn_changed = hci_dev_test_and_clear_flag(hdev,
1892 HCI_CONNECTABLE);
1893
1894 if ((scan & SCAN_INQUIRY)) {
1895 discov_changed = !hci_dev_test_and_set_flag(hdev,
1896 HCI_DISCOVERABLE);
1897 } else {
1898 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1899 discov_changed = hci_dev_test_and_clear_flag(hdev,
1900 HCI_DISCOVERABLE);
1901 }
1902
1903 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1904 return;
1905
1906 if (conn_changed || discov_changed) {
1907 /* In case this was disabled through mgmt */
1908 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1909
1910 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1911 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1912
1913 mgmt_new_settings(hdev);
1914 }
1915 }
1916
1917 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1918 {
1919 struct hci_dev *hdev;
1920 struct hci_dev_req dr;
1921 int err = 0;
1922
1923 if (copy_from_user(&dr, arg, sizeof(dr)))
1924 return -EFAULT;
1925
1926 hdev = hci_dev_get(dr.dev_id);
1927 if (!hdev)
1928 return -ENODEV;
1929
1930 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1931 err = -EBUSY;
1932 goto done;
1933 }
1934
1935 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1936 err = -EOPNOTSUPP;
1937 goto done;
1938 }
1939
1940 if (hdev->dev_type != HCI_PRIMARY) {
1941 err = -EOPNOTSUPP;
1942 goto done;
1943 }
1944
1945 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1946 err = -EOPNOTSUPP;
1947 goto done;
1948 }
1949
1950 switch (cmd) {
1951 case HCISETAUTH:
1952 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1953 HCI_INIT_TIMEOUT, NULL);
1954 break;
1955
1956 case HCISETENCRYPT:
1957 if (!lmp_encrypt_capable(hdev)) {
1958 err = -EOPNOTSUPP;
1959 break;
1960 }
1961
1962 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1963 /* Auth must be enabled first */
1964 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1965 HCI_INIT_TIMEOUT, NULL);
1966 if (err)
1967 break;
1968 }
1969
1970 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1971 HCI_INIT_TIMEOUT, NULL);
1972 break;
1973
1974 case HCISETSCAN:
1975 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1976 HCI_INIT_TIMEOUT, NULL);
1977
1978 /* Ensure that the connectable and discoverable states
1979 * get correctly modified as this was a non-mgmt change.
1980 */
1981 if (!err)
1982 hci_update_scan_state(hdev, dr.dev_opt);
1983 break;
1984
1985 case HCISETLINKPOL:
1986 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1987 HCI_INIT_TIMEOUT, NULL);
1988 break;
1989
1990 case HCISETLINKMODE:
1991 hdev->link_mode = ((__u16) dr.dev_opt) &
1992 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1993 break;
1994
1995 case HCISETPTYPE:
1996 if (hdev->pkt_type == (__u16) dr.dev_opt)
1997 break;
1998
1999 hdev->pkt_type = (__u16) dr.dev_opt;
2000 mgmt_phy_configuration_changed(hdev, NULL);
2001 break;
2002
2003 case HCISETACLMTU:
2004 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2005 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2006 break;
2007
2008 case HCISETSCOMTU:
2009 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2010 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2011 break;
2012
2013 default:
2014 err = -EINVAL;
2015 break;
2016 }
2017
2018 done:
2019 hci_dev_put(hdev);
2020 return err;
2021 }
2022
2023 int hci_get_dev_list(void __user *arg)
2024 {
2025 struct hci_dev *hdev;
2026 struct hci_dev_list_req *dl;
2027 struct hci_dev_req *dr;
2028 int n = 0, size, err;
2029 __u16 dev_num;
2030
2031 if (get_user(dev_num, (__u16 __user *) arg))
2032 return -EFAULT;
2033
2034 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2035 return -EINVAL;
2036
2037 size = sizeof(*dl) + dev_num * sizeof(*dr);
2038
2039 dl = kzalloc(size, GFP_KERNEL);
2040 if (!dl)
2041 return -ENOMEM;
2042
2043 dr = dl->dev_req;
2044
2045 read_lock(&hci_dev_list_lock);
2046 list_for_each_entry(hdev, &hci_dev_list, list) {
2047 unsigned long flags = hdev->flags;
2048
2049 /* When the auto-off is configured it means the transport
2050 * is running, but in that case still indicate that the
2051 * device is actually down.
2052 */
2053 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2054 flags &= ~BIT(HCI_UP);
2055
2056 (dr + n)->dev_id = hdev->id;
2057 (dr + n)->dev_opt = flags;
2058
2059 if (++n >= dev_num)
2060 break;
2061 }
2062 read_unlock(&hci_dev_list_lock);
2063
2064 dl->dev_num = n;
2065 size = sizeof(*dl) + n * sizeof(*dr);
2066
2067 err = copy_to_user(arg, dl, size);
2068 kfree(dl);
2069
2070 return err ? -EFAULT : 0;
2071 }
2072
2073 int hci_get_dev_info(void __user *arg)
2074 {
2075 struct hci_dev *hdev;
2076 struct hci_dev_info di;
2077 unsigned long flags;
2078 int err = 0;
2079
2080 if (copy_from_user(&di, arg, sizeof(di)))
2081 return -EFAULT;
2082
2083 hdev = hci_dev_get(di.dev_id);
2084 if (!hdev)
2085 return -ENODEV;
2086
2087 /* When the auto-off is configured it means the transport
2088 * is running, but in that case still indicate that the
2089 * device is actually down.
2090 */
2091 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2092 flags = hdev->flags & ~BIT(HCI_UP);
2093 else
2094 flags = hdev->flags;
2095
2096 strcpy(di.name, hdev->name);
2097 di.bdaddr = hdev->bdaddr;
2098 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2099 di.flags = flags;
2100 di.pkt_type = hdev->pkt_type;
2101 if (lmp_bredr_capable(hdev)) {
2102 di.acl_mtu = hdev->acl_mtu;
2103 di.acl_pkts = hdev->acl_pkts;
2104 di.sco_mtu = hdev->sco_mtu;
2105 di.sco_pkts = hdev->sco_pkts;
2106 } else {
2107 di.acl_mtu = hdev->le_mtu;
2108 di.acl_pkts = hdev->le_pkts;
2109 di.sco_mtu = 0;
2110 di.sco_pkts = 0;
2111 }
2112 di.link_policy = hdev->link_policy;
2113 di.link_mode = hdev->link_mode;
2114
2115 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2116 memcpy(&di.features, &hdev->features, sizeof(di.features));
2117
2118 if (copy_to_user(arg, &di, sizeof(di)))
2119 err = -EFAULT;
2120
2121 hci_dev_put(hdev);
2122
2123 return err;
2124 }
2125
2126 /* ---- Interface to HCI drivers ---- */
2127
2128 static int hci_rfkill_set_block(void *data, bool blocked)
2129 {
2130 struct hci_dev *hdev = data;
2131
2132 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2133
2134 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2135 return -EBUSY;
2136
2137 if (blocked) {
2138 hci_dev_set_flag(hdev, HCI_RFKILLED);
2139 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2140 !hci_dev_test_flag(hdev, HCI_CONFIG))
2141 hci_dev_do_close(hdev);
2142 } else {
2143 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2144 }
2145
2146 return 0;
2147 }
2148
2149 static const struct rfkill_ops hci_rfkill_ops = {
2150 .set_block = hci_rfkill_set_block,
2151 };
2152
2153 static void hci_power_on(struct work_struct *work)
2154 {
2155 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2156 int err;
2157
2158 BT_DBG("%s", hdev->name);
2159
2160 if (test_bit(HCI_UP, &hdev->flags) &&
2161 hci_dev_test_flag(hdev, HCI_MGMT) &&
2162 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2163 cancel_delayed_work(&hdev->power_off);
2164 hci_req_sync_lock(hdev);
2165 err = __hci_req_hci_power_on(hdev);
2166 hci_req_sync_unlock(hdev);
2167 mgmt_power_on(hdev, err);
2168 return;
2169 }
2170
2171 err = hci_dev_do_open(hdev);
2172 if (err < 0) {
2173 hci_dev_lock(hdev);
2174 mgmt_set_powered_failed(hdev, err);
2175 hci_dev_unlock(hdev);
2176 return;
2177 }
2178
2179 /* During the HCI setup phase, a few error conditions are
2180 * ignored and they need to be checked now. If they are still
2181 * valid, it is important to turn the device back off.
2182 */
2183 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2184 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2185 (hdev->dev_type == HCI_PRIMARY &&
2186 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2187 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2188 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2189 hci_dev_do_close(hdev);
2190 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2191 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2192 HCI_AUTO_OFF_TIMEOUT);
2193 }
2194
2195 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2196 /* For unconfigured devices, set the HCI_RAW flag
2197 * so that userspace can easily identify them.
2198 */
2199 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2200 set_bit(HCI_RAW, &hdev->flags);
2201
2202 /* For fully configured devices, this will send
2203 * the Index Added event. For unconfigured devices,
2204 * it will send Unconfigued Index Added event.
2205 *
2206 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2207 * and no event will be send.
2208 */
2209 mgmt_index_added(hdev);
2210 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2211 /* When the controller is now configured, then it
2212 * is important to clear the HCI_RAW flag.
2213 */
2214 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2215 clear_bit(HCI_RAW, &hdev->flags);
2216
2217 /* Powering on the controller with HCI_CONFIG set only
2218 * happens with the transition from unconfigured to
2219 * configured. This will send the Index Added event.
2220 */
2221 mgmt_index_added(hdev);
2222 }
2223 }
2224
2225 static void hci_power_off(struct work_struct *work)
2226 {
2227 struct hci_dev *hdev = container_of(work, struct hci_dev,
2228 power_off.work);
2229
2230 BT_DBG("%s", hdev->name);
2231
2232 hci_dev_do_close(hdev);
2233 }
2234
2235 static void hci_error_reset(struct work_struct *work)
2236 {
2237 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2238
2239 BT_DBG("%s", hdev->name);
2240
2241 if (hdev->hw_error)
2242 hdev->hw_error(hdev, hdev->hw_error_code);
2243 else
2244 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2245
2246 if (hci_dev_do_close(hdev))
2247 return;
2248
2249 hci_dev_do_open(hdev);
2250 }
2251
2252 void hci_uuids_clear(struct hci_dev *hdev)
2253 {
2254 struct bt_uuid *uuid, *tmp;
2255
2256 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2257 list_del(&uuid->list);
2258 kfree(uuid);
2259 }
2260 }
2261
2262 void hci_link_keys_clear(struct hci_dev *hdev)
2263 {
2264 struct link_key *key;
2265
2266 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2267 list_del_rcu(&key->list);
2268 kfree_rcu(key, rcu);
2269 }
2270 }
2271
2272 void hci_smp_ltks_clear(struct hci_dev *hdev)
2273 {
2274 struct smp_ltk *k;
2275
2276 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2277 list_del_rcu(&k->list);
2278 kfree_rcu(k, rcu);
2279 }
2280 }
2281
2282 void hci_smp_irks_clear(struct hci_dev *hdev)
2283 {
2284 struct smp_irk *k;
2285
2286 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2287 list_del_rcu(&k->list);
2288 kfree_rcu(k, rcu);
2289 }
2290 }
2291
2292 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2293 {
2294 struct link_key *k;
2295
2296 rcu_read_lock();
2297 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2298 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2299 rcu_read_unlock();
2300 return k;
2301 }
2302 }
2303 rcu_read_unlock();
2304
2305 return NULL;
2306 }
2307
2308 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2309 u8 key_type, u8 old_key_type)
2310 {
2311 /* Legacy key */
2312 if (key_type < 0x03)
2313 return true;
2314
2315 /* Debug keys are insecure so don't store them persistently */
2316 if (key_type == HCI_LK_DEBUG_COMBINATION)
2317 return false;
2318
2319 /* Changed combination key and there's no previous one */
2320 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2321 return false;
2322
2323 /* Security mode 3 case */
2324 if (!conn)
2325 return true;
2326
2327 /* BR/EDR key derived using SC from an LE link */
2328 if (conn->type == LE_LINK)
2329 return true;
2330
2331 /* Neither local nor remote side had no-bonding as requirement */
2332 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2333 return true;
2334
2335 /* Local side had dedicated bonding as requirement */
2336 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2337 return true;
2338
2339 /* Remote side had dedicated bonding as requirement */
2340 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2341 return true;
2342
2343 /* If none of the above criteria match, then don't store the key
2344 * persistently */
2345 return false;
2346 }
2347
2348 static u8 ltk_role(u8 type)
2349 {
2350 if (type == SMP_LTK)
2351 return HCI_ROLE_MASTER;
2352
2353 return HCI_ROLE_SLAVE;
2354 }
2355
2356 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2357 u8 addr_type, u8 role)
2358 {
2359 struct smp_ltk *k;
2360
2361 rcu_read_lock();
2362 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2363 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2364 continue;
2365
2366 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2367 rcu_read_unlock();
2368 return k;
2369 }
2370 }
2371 rcu_read_unlock();
2372
2373 return NULL;
2374 }
2375
2376 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2377 {
2378 struct smp_irk *irk;
2379
2380 rcu_read_lock();
2381 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2382 if (!bacmp(&irk->rpa, rpa)) {
2383 rcu_read_unlock();
2384 return irk;
2385 }
2386 }
2387
2388 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2389 if (smp_irk_matches(hdev, irk->val, rpa)) {
2390 bacpy(&irk->rpa, rpa);
2391 rcu_read_unlock();
2392 return irk;
2393 }
2394 }
2395 rcu_read_unlock();
2396
2397 return NULL;
2398 }
2399
2400 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2401 u8 addr_type)
2402 {
2403 struct smp_irk *irk;
2404
2405 /* Identity Address must be public or static random */
2406 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2407 return NULL;
2408
2409 rcu_read_lock();
2410 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2411 if (addr_type == irk->addr_type &&
2412 bacmp(bdaddr, &irk->bdaddr) == 0) {
2413 rcu_read_unlock();
2414 return irk;
2415 }
2416 }
2417 rcu_read_unlock();
2418
2419 return NULL;
2420 }
2421
2422 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2423 bdaddr_t *bdaddr, u8 *val, u8 type,
2424 u8 pin_len, bool *persistent)
2425 {
2426 struct link_key *key, *old_key;
2427 u8 old_key_type;
2428
2429 old_key = hci_find_link_key(hdev, bdaddr);
2430 if (old_key) {
2431 old_key_type = old_key->type;
2432 key = old_key;
2433 } else {
2434 old_key_type = conn ? conn->key_type : 0xff;
2435 key = kzalloc(sizeof(*key), GFP_KERNEL);
2436 if (!key)
2437 return NULL;
2438 list_add_rcu(&key->list, &hdev->link_keys);
2439 }
2440
2441 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2442
2443 /* Some buggy controller combinations generate a changed
2444 * combination key for legacy pairing even when there's no
2445 * previous key */
2446 if (type == HCI_LK_CHANGED_COMBINATION &&
2447 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2448 type = HCI_LK_COMBINATION;
2449 if (conn)
2450 conn->key_type = type;
2451 }
2452
2453 bacpy(&key->bdaddr, bdaddr);
2454 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2455 key->pin_len = pin_len;
2456
2457 if (type == HCI_LK_CHANGED_COMBINATION)
2458 key->type = old_key_type;
2459 else
2460 key->type = type;
2461
2462 if (persistent)
2463 *persistent = hci_persistent_key(hdev, conn, type,
2464 old_key_type);
2465
2466 return key;
2467 }
2468
2469 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2470 u8 addr_type, u8 type, u8 authenticated,
2471 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2472 {
2473 struct smp_ltk *key, *old_key;
2474 u8 role = ltk_role(type);
2475
2476 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2477 if (old_key)
2478 key = old_key;
2479 else {
2480 key = kzalloc(sizeof(*key), GFP_KERNEL);
2481 if (!key)
2482 return NULL;
2483 list_add_rcu(&key->list, &hdev->long_term_keys);
2484 }
2485
2486 bacpy(&key->bdaddr, bdaddr);
2487 key->bdaddr_type = addr_type;
2488 memcpy(key->val, tk, sizeof(key->val));
2489 key->authenticated = authenticated;
2490 key->ediv = ediv;
2491 key->rand = rand;
2492 key->enc_size = enc_size;
2493 key->type = type;
2494
2495 return key;
2496 }
2497
2498 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2499 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2500 {
2501 struct smp_irk *irk;
2502
2503 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2504 if (!irk) {
2505 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2506 if (!irk)
2507 return NULL;
2508
2509 bacpy(&irk->bdaddr, bdaddr);
2510 irk->addr_type = addr_type;
2511
2512 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2513 }
2514
2515 memcpy(irk->val, val, 16);
2516 bacpy(&irk->rpa, rpa);
2517
2518 return irk;
2519 }
2520
2521 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2522 {
2523 struct link_key *key;
2524
2525 key = hci_find_link_key(hdev, bdaddr);
2526 if (!key)
2527 return -ENOENT;
2528
2529 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2530
2531 list_del_rcu(&key->list);
2532 kfree_rcu(key, rcu);
2533
2534 return 0;
2535 }
2536
2537 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2538 {
2539 struct smp_ltk *k;
2540 int removed = 0;
2541
2542 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2543 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2544 continue;
2545
2546 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2547
2548 list_del_rcu(&k->list);
2549 kfree_rcu(k, rcu);
2550 removed++;
2551 }
2552
2553 return removed ? 0 : -ENOENT;
2554 }
2555
2556 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2557 {
2558 struct smp_irk *k;
2559
2560 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2561 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2562 continue;
2563
2564 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2565
2566 list_del_rcu(&k->list);
2567 kfree_rcu(k, rcu);
2568 }
2569 }
2570
2571 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2572 {
2573 struct smp_ltk *k;
2574 struct smp_irk *irk;
2575 u8 addr_type;
2576
2577 if (type == BDADDR_BREDR) {
2578 if (hci_find_link_key(hdev, bdaddr))
2579 return true;
2580 return false;
2581 }
2582
2583 /* Convert to HCI addr type which struct smp_ltk uses */
2584 if (type == BDADDR_LE_PUBLIC)
2585 addr_type = ADDR_LE_DEV_PUBLIC;
2586 else
2587 addr_type = ADDR_LE_DEV_RANDOM;
2588
2589 irk = hci_get_irk(hdev, bdaddr, addr_type);
2590 if (irk) {
2591 bdaddr = &irk->bdaddr;
2592 addr_type = irk->addr_type;
2593 }
2594
2595 rcu_read_lock();
2596 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2597 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2598 rcu_read_unlock();
2599 return true;
2600 }
2601 }
2602 rcu_read_unlock();
2603
2604 return false;
2605 }
2606
2607 /* HCI command timer function */
2608 static void hci_cmd_timeout(struct work_struct *work)
2609 {
2610 struct hci_dev *hdev = container_of(work, struct hci_dev,
2611 cmd_timer.work);
2612
2613 if (hdev->sent_cmd) {
2614 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2615 u16 opcode = __le16_to_cpu(sent->opcode);
2616
2617 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2618 } else {
2619 bt_dev_err(hdev, "command tx timeout");
2620 }
2621
2622 if (hdev->cmd_timeout)
2623 hdev->cmd_timeout(hdev);
2624
2625 atomic_set(&hdev->cmd_cnt, 1);
2626 queue_work(hdev->workqueue, &hdev->cmd_work);
2627 }
2628
2629 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2630 bdaddr_t *bdaddr, u8 bdaddr_type)
2631 {
2632 struct oob_data *data;
2633
2634 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2635 if (bacmp(bdaddr, &data->bdaddr) != 0)
2636 continue;
2637 if (data->bdaddr_type != bdaddr_type)
2638 continue;
2639 return data;
2640 }
2641
2642 return NULL;
2643 }
2644
2645 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2646 u8 bdaddr_type)
2647 {
2648 struct oob_data *data;
2649
2650 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2651 if (!data)
2652 return -ENOENT;
2653
2654 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2655
2656 list_del(&data->list);
2657 kfree(data);
2658
2659 return 0;
2660 }
2661
2662 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2663 {
2664 struct oob_data *data, *n;
2665
2666 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2667 list_del(&data->list);
2668 kfree(data);
2669 }
2670 }
2671
2672 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2673 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2674 u8 *hash256, u8 *rand256)
2675 {
2676 struct oob_data *data;
2677
2678 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2679 if (!data) {
2680 data = kmalloc(sizeof(*data), GFP_KERNEL);
2681 if (!data)
2682 return -ENOMEM;
2683
2684 bacpy(&data->bdaddr, bdaddr);
2685 data->bdaddr_type = bdaddr_type;
2686 list_add(&data->list, &hdev->remote_oob_data);
2687 }
2688
2689 if (hash192 && rand192) {
2690 memcpy(data->hash192, hash192, sizeof(data->hash192));
2691 memcpy(data->rand192, rand192, sizeof(data->rand192));
2692 if (hash256 && rand256)
2693 data->present = 0x03;
2694 } else {
2695 memset(data->hash192, 0, sizeof(data->hash192));
2696 memset(data->rand192, 0, sizeof(data->rand192));
2697 if (hash256 && rand256)
2698 data->present = 0x02;
2699 else
2700 data->present = 0x00;
2701 }
2702
2703 if (hash256 && rand256) {
2704 memcpy(data->hash256, hash256, sizeof(data->hash256));
2705 memcpy(data->rand256, rand256, sizeof(data->rand256));
2706 } else {
2707 memset(data->hash256, 0, sizeof(data->hash256));
2708 memset(data->rand256, 0, sizeof(data->rand256));
2709 if (hash192 && rand192)
2710 data->present = 0x01;
2711 }
2712
2713 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2714
2715 return 0;
2716 }
2717
2718 /* This function requires the caller holds hdev->lock */
2719 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2720 {
2721 struct adv_info *adv_instance;
2722
2723 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2724 if (adv_instance->instance == instance)
2725 return adv_instance;
2726 }
2727
2728 return NULL;
2729 }
2730
2731 /* This function requires the caller holds hdev->lock */
2732 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2733 {
2734 struct adv_info *cur_instance;
2735
2736 cur_instance = hci_find_adv_instance(hdev, instance);
2737 if (!cur_instance)
2738 return NULL;
2739
2740 if (cur_instance == list_last_entry(&hdev->adv_instances,
2741 struct adv_info, list))
2742 return list_first_entry(&hdev->adv_instances,
2743 struct adv_info, list);
2744 else
2745 return list_next_entry(cur_instance, list);
2746 }
2747
2748 /* This function requires the caller holds hdev->lock */
2749 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2750 {
2751 struct adv_info *adv_instance;
2752
2753 adv_instance = hci_find_adv_instance(hdev, instance);
2754 if (!adv_instance)
2755 return -ENOENT;
2756
2757 BT_DBG("%s removing %dMR", hdev->name, instance);
2758
2759 if (hdev->cur_adv_instance == instance) {
2760 if (hdev->adv_instance_timeout) {
2761 cancel_delayed_work(&hdev->adv_instance_expire);
2762 hdev->adv_instance_timeout = 0;
2763 }
2764 hdev->cur_adv_instance = 0x00;
2765 }
2766
2767 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2768
2769 list_del(&adv_instance->list);
2770 kfree(adv_instance);
2771
2772 hdev->adv_instance_cnt--;
2773
2774 return 0;
2775 }
2776
2777 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
2778 {
2779 struct adv_info *adv_instance, *n;
2780
2781 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
2782 adv_instance->rpa_expired = rpa_expired;
2783 }
2784
2785 /* This function requires the caller holds hdev->lock */
2786 void hci_adv_instances_clear(struct hci_dev *hdev)
2787 {
2788 struct adv_info *adv_instance, *n;
2789
2790 if (hdev->adv_instance_timeout) {
2791 cancel_delayed_work(&hdev->adv_instance_expire);
2792 hdev->adv_instance_timeout = 0;
2793 }
2794
2795 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2796 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2797 list_del(&adv_instance->list);
2798 kfree(adv_instance);
2799 }
2800
2801 hdev->adv_instance_cnt = 0;
2802 hdev->cur_adv_instance = 0x00;
2803 }
2804
2805 static void adv_instance_rpa_expired(struct work_struct *work)
2806 {
2807 struct adv_info *adv_instance = container_of(work, struct adv_info,
2808 rpa_expired_cb.work);
2809
2810 BT_DBG("");
2811
2812 adv_instance->rpa_expired = true;
2813 }
2814
2815 /* This function requires the caller holds hdev->lock */
2816 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2817 u16 adv_data_len, u8 *adv_data,
2818 u16 scan_rsp_len, u8 *scan_rsp_data,
2819 u16 timeout, u16 duration)
2820 {
2821 struct adv_info *adv_instance;
2822
2823 adv_instance = hci_find_adv_instance(hdev, instance);
2824 if (adv_instance) {
2825 memset(adv_instance->adv_data, 0,
2826 sizeof(adv_instance->adv_data));
2827 memset(adv_instance->scan_rsp_data, 0,
2828 sizeof(adv_instance->scan_rsp_data));
2829 } else {
2830 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2831 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2832 return -EOVERFLOW;
2833
2834 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2835 if (!adv_instance)
2836 return -ENOMEM;
2837
2838 adv_instance->pending = true;
2839 adv_instance->instance = instance;
2840 list_add(&adv_instance->list, &hdev->adv_instances);
2841 hdev->adv_instance_cnt++;
2842 }
2843
2844 adv_instance->flags = flags;
2845 adv_instance->adv_data_len = adv_data_len;
2846 adv_instance->scan_rsp_len = scan_rsp_len;
2847
2848 if (adv_data_len)
2849 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2850
2851 if (scan_rsp_len)
2852 memcpy(adv_instance->scan_rsp_data,
2853 scan_rsp_data, scan_rsp_len);
2854
2855 adv_instance->timeout = timeout;
2856 adv_instance->remaining_time = timeout;
2857
2858 if (duration == 0)
2859 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2860 else
2861 adv_instance->duration = duration;
2862
2863 adv_instance->tx_power = HCI_TX_POWER_INVALID;
2864
2865 INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
2866 adv_instance_rpa_expired);
2867
2868 BT_DBG("%s for %dMR", hdev->name, instance);
2869
2870 return 0;
2871 }
2872
2873 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2874 bdaddr_t *bdaddr, u8 type)
2875 {
2876 struct bdaddr_list *b;
2877
2878 list_for_each_entry(b, bdaddr_list, list) {
2879 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2880 return b;
2881 }
2882
2883 return NULL;
2884 }
2885
2886 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2887 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2888 u8 type)
2889 {
2890 struct bdaddr_list_with_irk *b;
2891
2892 list_for_each_entry(b, bdaddr_list, list) {
2893 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2894 return b;
2895 }
2896
2897 return NULL;
2898 }
2899
2900 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2901 {
2902 struct bdaddr_list *b, *n;
2903
2904 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2905 list_del(&b->list);
2906 kfree(b);
2907 }
2908 }
2909
2910 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2911 {
2912 struct bdaddr_list *entry;
2913
2914 if (!bacmp(bdaddr, BDADDR_ANY))
2915 return -EBADF;
2916
2917 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2918 return -EEXIST;
2919
2920 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2921 if (!entry)
2922 return -ENOMEM;
2923
2924 bacpy(&entry->bdaddr, bdaddr);
2925 entry->bdaddr_type = type;
2926
2927 list_add(&entry->list, list);
2928
2929 return 0;
2930 }
2931
2932 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2933 u8 type, u8 *peer_irk, u8 *local_irk)
2934 {
2935 struct bdaddr_list_with_irk *entry;
2936
2937 if (!bacmp(bdaddr, BDADDR_ANY))
2938 return -EBADF;
2939
2940 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2941 return -EEXIST;
2942
2943 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2944 if (!entry)
2945 return -ENOMEM;
2946
2947 bacpy(&entry->bdaddr, bdaddr);
2948 entry->bdaddr_type = type;
2949
2950 if (peer_irk)
2951 memcpy(entry->peer_irk, peer_irk, 16);
2952
2953 if (local_irk)
2954 memcpy(entry->local_irk, local_irk, 16);
2955
2956 list_add(&entry->list, list);
2957
2958 return 0;
2959 }
2960
2961 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2962 {
2963 struct bdaddr_list *entry;
2964
2965 if (!bacmp(bdaddr, BDADDR_ANY)) {
2966 hci_bdaddr_list_clear(list);
2967 return 0;
2968 }
2969
2970 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2971 if (!entry)
2972 return -ENOENT;
2973
2974 list_del(&entry->list);
2975 kfree(entry);
2976
2977 return 0;
2978 }
2979
2980 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2981 u8 type)
2982 {
2983 struct bdaddr_list_with_irk *entry;
2984
2985 if (!bacmp(bdaddr, BDADDR_ANY)) {
2986 hci_bdaddr_list_clear(list);
2987 return 0;
2988 }
2989
2990 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2991 if (!entry)
2992 return -ENOENT;
2993
2994 list_del(&entry->list);
2995 kfree(entry);
2996
2997 return 0;
2998 }
2999
3000 /* This function requires the caller holds hdev->lock */
3001 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3002 bdaddr_t *addr, u8 addr_type)
3003 {
3004 struct hci_conn_params *params;
3005
3006 list_for_each_entry(params, &hdev->le_conn_params, list) {
3007 if (bacmp(&params->addr, addr) == 0 &&
3008 params->addr_type == addr_type) {
3009 return params;
3010 }
3011 }
3012
3013 return NULL;
3014 }
3015
3016 /* This function requires the caller holds hdev->lock */
3017 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3018 bdaddr_t *addr, u8 addr_type)
3019 {
3020 struct hci_conn_params *param;
3021
3022 list_for_each_entry(param, list, action) {
3023 if (bacmp(&param->addr, addr) == 0 &&
3024 param->addr_type == addr_type)
3025 return param;
3026 }
3027
3028 return NULL;
3029 }
3030
3031 /* This function requires the caller holds hdev->lock */
3032 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3033 bdaddr_t *addr, u8 addr_type)
3034 {
3035 struct hci_conn_params *params;
3036
3037 params = hci_conn_params_lookup(hdev, addr, addr_type);
3038 if (params)
3039 return params;
3040
3041 params = kzalloc(sizeof(*params), GFP_KERNEL);
3042 if (!params) {
3043 bt_dev_err(hdev, "out of memory");
3044 return NULL;
3045 }
3046
3047 bacpy(&params->addr, addr);
3048 params->addr_type = addr_type;
3049
3050 list_add(&params->list, &hdev->le_conn_params);
3051 INIT_LIST_HEAD(&params->action);
3052
3053 params->conn_min_interval = hdev->le_conn_min_interval;
3054 params->conn_max_interval = hdev->le_conn_max_interval;
3055 params->conn_latency = hdev->le_conn_latency;
3056 params->supervision_timeout = hdev->le_supv_timeout;
3057 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3058
3059 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3060
3061 return params;
3062 }
3063
3064 static void hci_conn_params_free(struct hci_conn_params *params)
3065 {
3066 if (params->conn) {
3067 hci_conn_drop(params->conn);
3068 hci_conn_put(params->conn);
3069 }
3070
3071 list_del(&params->action);
3072 list_del(&params->list);
3073 kfree(params);
3074 }
3075
3076 /* This function requires the caller holds hdev->lock */
3077 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3078 {
3079 struct hci_conn_params *params;
3080
3081 params = hci_conn_params_lookup(hdev, addr, addr_type);
3082 if (!params)
3083 return;
3084
3085 hci_conn_params_free(params);
3086
3087 hci_update_background_scan(hdev);
3088
3089 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3090 }
3091
3092 /* This function requires the caller holds hdev->lock */
3093 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3094 {
3095 struct hci_conn_params *params, *tmp;
3096
3097 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3098 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3099 continue;
3100
3101 /* If trying to estabilish one time connection to disabled
3102 * device, leave the params, but mark them as just once.
3103 */
3104 if (params->explicit_connect) {
3105 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
3106 continue;
3107 }
3108
3109 list_del(&params->list);
3110 kfree(params);
3111 }
3112
3113 BT_DBG("All LE disabled connection parameters were removed");
3114 }
3115
3116 /* This function requires the caller holds hdev->lock */
3117 static void hci_conn_params_clear_all(struct hci_dev *hdev)
3118 {
3119 struct hci_conn_params *params, *tmp;
3120
3121 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3122 hci_conn_params_free(params);
3123
3124 BT_DBG("All LE connection parameters were removed");
3125 }
3126
3127 /* Copy the Identity Address of the controller.
3128 *
3129 * If the controller has a public BD_ADDR, then by default use that one.
3130 * If this is a LE only controller without a public address, default to
3131 * the static random address.
3132 *
3133 * For debugging purposes it is possible to force controllers with a
3134 * public address to use the static random address instead.
3135 *
3136 * In case BR/EDR has been disabled on a dual-mode controller and
3137 * userspace has configured a static address, then that address
3138 * becomes the identity address instead of the public BR/EDR address.
3139 */
3140 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3141 u8 *bdaddr_type)
3142 {
3143 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3144 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3145 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3146 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3147 bacpy(bdaddr, &hdev->static_addr);
3148 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3149 } else {
3150 bacpy(bdaddr, &hdev->bdaddr);
3151 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3152 }
3153 }
3154
3155 /* Alloc HCI device */
3156 struct hci_dev *hci_alloc_dev(void)
3157 {
3158 struct hci_dev *hdev;
3159
3160 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3161 if (!hdev)
3162 return NULL;
3163
3164 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3165 hdev->esco_type = (ESCO_HV1);
3166 hdev->link_mode = (HCI_LM_ACCEPT);
3167 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3168 hdev->io_capability = 0x03; /* No Input No Output */
3169 hdev->manufacturer = 0xffff; /* Default to internal use */
3170 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3171 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3172 hdev->adv_instance_cnt = 0;
3173 hdev->cur_adv_instance = 0x00;
3174 hdev->adv_instance_timeout = 0;
3175
3176 hdev->sniff_max_interval = 800;
3177 hdev->sniff_min_interval = 80;
3178
3179 hdev->le_adv_channel_map = 0x07;
3180 hdev->le_adv_min_interval = 0x0800;
3181 hdev->le_adv_max_interval = 0x0800;
3182 hdev->le_scan_interval = 0x0060;
3183 hdev->le_scan_window = 0x0030;
3184 hdev->le_conn_min_interval = 0x0018;
3185 hdev->le_conn_max_interval = 0x0028;
3186 hdev->le_conn_latency = 0x0000;
3187 hdev->le_supv_timeout = 0x002a;
3188 hdev->le_def_tx_len = 0x001b;
3189 hdev->le_def_tx_time = 0x0148;
3190 hdev->le_max_tx_len = 0x001b;
3191 hdev->le_max_tx_time = 0x0148;
3192 hdev->le_max_rx_len = 0x001b;
3193 hdev->le_max_rx_time = 0x0148;
3194 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
3195 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3196 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
3197 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3198
3199 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3200 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3201 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3202 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3203
3204 mutex_init(&hdev->lock);
3205 mutex_init(&hdev->req_lock);
3206
3207 INIT_LIST_HEAD(&hdev->mgmt_pending);
3208 INIT_LIST_HEAD(&hdev->blacklist);
3209 INIT_LIST_HEAD(&hdev->whitelist);
3210 INIT_LIST_HEAD(&hdev->uuids);
3211 INIT_LIST_HEAD(&hdev->link_keys);
3212 INIT_LIST_HEAD(&hdev->long_term_keys);
3213 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3214 INIT_LIST_HEAD(&hdev->remote_oob_data);
3215 INIT_LIST_HEAD(&hdev->le_white_list);
3216 INIT_LIST_HEAD(&hdev->le_resolv_list);
3217 INIT_LIST_HEAD(&hdev->le_conn_params);
3218 INIT_LIST_HEAD(&hdev->pend_le_conns);
3219 INIT_LIST_HEAD(&hdev->pend_le_reports);
3220 INIT_LIST_HEAD(&hdev->conn_hash.list);
3221 INIT_LIST_HEAD(&hdev->adv_instances);
3222
3223 INIT_WORK(&hdev->rx_work, hci_rx_work);
3224 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3225 INIT_WORK(&hdev->tx_work, hci_tx_work);
3226 INIT_WORK(&hdev->power_on, hci_power_on);
3227 INIT_WORK(&hdev->error_reset, hci_error_reset);
3228
3229 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3230
3231 skb_queue_head_init(&hdev->rx_q);
3232 skb_queue_head_init(&hdev->cmd_q);
3233 skb_queue_head_init(&hdev->raw_q);
3234
3235 init_waitqueue_head(&hdev->req_wait_q);
3236
3237 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3238
3239 hci_request_setup(hdev);
3240
3241 hci_init_sysfs(hdev);
3242 discovery_init(hdev);
3243
3244 return hdev;
3245 }
3246 EXPORT_SYMBOL(hci_alloc_dev);
3247
3248 /* Free HCI device */
3249 void hci_free_dev(struct hci_dev *hdev)
3250 {
3251 /* will free via device release */
3252 put_device(&hdev->dev);
3253 }
3254 EXPORT_SYMBOL(hci_free_dev);
3255
3256 /* Register HCI device */
3257 int hci_register_dev(struct hci_dev *hdev)
3258 {
3259 int id, error;
3260
3261 if (!hdev->open || !hdev->close || !hdev->send)
3262 return -EINVAL;
3263
3264 /* Do not allow HCI_AMP devices to register at index 0,
3265 * so the index can be used as the AMP controller ID.
3266 */
3267 switch (hdev->dev_type) {
3268 case HCI_PRIMARY:
3269 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3270 break;
3271 case HCI_AMP:
3272 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3273 break;
3274 default:
3275 return -EINVAL;
3276 }
3277
3278 if (id < 0)
3279 return id;
3280
3281 sprintf(hdev->name, "hci%d", id);
3282 hdev->id = id;
3283
3284 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3285
3286 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3287 if (!hdev->workqueue) {
3288 error = -ENOMEM;
3289 goto err;
3290 }
3291
3292 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3293 hdev->name);
3294 if (!hdev->req_workqueue) {
3295 destroy_workqueue(hdev->workqueue);
3296 error = -ENOMEM;
3297 goto err;
3298 }
3299
3300 if (!IS_ERR_OR_NULL(bt_debugfs))
3301 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3302
3303 dev_set_name(&hdev->dev, "%s", hdev->name);
3304
3305 error = device_add(&hdev->dev);
3306 if (error < 0)
3307 goto err_wqueue;
3308
3309 hci_leds_init(hdev);
3310
3311 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3312 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3313 hdev);
3314 if (hdev->rfkill) {
3315 if (rfkill_register(hdev->rfkill) < 0) {
3316 rfkill_destroy(hdev->rfkill);
3317 hdev->rfkill = NULL;
3318 }
3319 }
3320
3321 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3322 hci_dev_set_flag(hdev, HCI_RFKILLED);
3323
3324 hci_dev_set_flag(hdev, HCI_SETUP);
3325 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3326
3327 if (hdev->dev_type == HCI_PRIMARY) {
3328 /* Assume BR/EDR support until proven otherwise (such as
3329 * through reading supported features during init.
3330 */
3331 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3332 }
3333
3334 write_lock(&hci_dev_list_lock);
3335 list_add(&hdev->list, &hci_dev_list);
3336 write_unlock(&hci_dev_list_lock);
3337
3338 /* Devices that are marked for raw-only usage are unconfigured
3339 * and should not be included in normal operation.
3340 */
3341 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3342 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3343
3344 hci_sock_dev_event(hdev, HCI_DEV_REG);
3345 hci_dev_hold(hdev);
3346
3347 queue_work(hdev->req_workqueue, &hdev->power_on);
3348
3349 return id;
3350
3351 err_wqueue:
3352 destroy_workqueue(hdev->workqueue);
3353 destroy_workqueue(hdev->req_workqueue);
3354 err:
3355 ida_simple_remove(&hci_index_ida, hdev->id);
3356
3357 return error;
3358 }
3359 EXPORT_SYMBOL(hci_register_dev);
3360
3361 /* Unregister HCI device */
3362 void hci_unregister_dev(struct hci_dev *hdev)
3363 {
3364 int id;
3365
3366 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3367
3368 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3369
3370 id = hdev->id;
3371
3372 write_lock(&hci_dev_list_lock);
3373 list_del(&hdev->list);
3374 write_unlock(&hci_dev_list_lock);
3375
3376 cancel_work_sync(&hdev->power_on);
3377
3378 hci_dev_do_close(hdev);
3379
3380 if (!test_bit(HCI_INIT, &hdev->flags) &&
3381 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3382 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3383 hci_dev_lock(hdev);
3384 mgmt_index_removed(hdev);
3385 hci_dev_unlock(hdev);
3386 }
3387
3388 /* mgmt_index_removed should take care of emptying the
3389 * pending list */
3390 BUG_ON(!list_empty(&hdev->mgmt_pending));
3391
3392 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3393
3394 if (hdev->rfkill) {
3395 rfkill_unregister(hdev->rfkill);
3396 rfkill_destroy(hdev->rfkill);
3397 }
3398
3399 device_del(&hdev->dev);
3400
3401 debugfs_remove_recursive(hdev->debugfs);
3402 kfree_const(hdev->hw_info);
3403 kfree_const(hdev->fw_info);
3404
3405 destroy_workqueue(hdev->workqueue);
3406 destroy_workqueue(hdev->req_workqueue);
3407
3408 hci_dev_lock(hdev);
3409 hci_bdaddr_list_clear(&hdev->blacklist);
3410 hci_bdaddr_list_clear(&hdev->whitelist);
3411 hci_uuids_clear(hdev);
3412 hci_link_keys_clear(hdev);
3413 hci_smp_ltks_clear(hdev);
3414 hci_smp_irks_clear(hdev);
3415 hci_remote_oob_data_clear(hdev);
3416 hci_adv_instances_clear(hdev);
3417 hci_bdaddr_list_clear(&hdev->le_white_list);
3418 hci_bdaddr_list_clear(&hdev->le_resolv_list);
3419 hci_conn_params_clear_all(hdev);
3420 hci_discovery_filter_clear(hdev);
3421 hci_dev_unlock(hdev);
3422
3423 hci_dev_put(hdev);
3424
3425 ida_simple_remove(&hci_index_ida, id);
3426 }
3427 EXPORT_SYMBOL(hci_unregister_dev);
3428
3429 /* Suspend HCI device */
3430 int hci_suspend_dev(struct hci_dev *hdev)
3431 {
3432 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3433 return 0;
3434 }
3435 EXPORT_SYMBOL(hci_suspend_dev);
3436
3437 /* Resume HCI device */
3438 int hci_resume_dev(struct hci_dev *hdev)
3439 {
3440 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3441 return 0;
3442 }
3443 EXPORT_SYMBOL(hci_resume_dev);
3444
3445 /* Reset HCI device */
3446 int hci_reset_dev(struct hci_dev *hdev)
3447 {
3448 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3449 struct sk_buff *skb;
3450
3451 skb = bt_skb_alloc(3, GFP_ATOMIC);
3452 if (!skb)
3453 return -ENOMEM;
3454
3455 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3456 skb_put_data(skb, hw_err, 3);
3457
3458 /* Send Hardware Error to upper stack */
3459 return hci_recv_frame(hdev, skb);
3460 }
3461 EXPORT_SYMBOL(hci_reset_dev);
3462
3463 /* Receive frame from HCI drivers */
3464 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3465 {
3466 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3467 && !test_bit(HCI_INIT, &hdev->flags))) {
3468 kfree_skb(skb);
3469 return -ENXIO;
3470 }
3471
3472 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3473 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3474 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
3475 kfree_skb(skb);
3476 return -EINVAL;
3477 }
3478
3479 /* Incoming skb */
3480 bt_cb(skb)->incoming = 1;
3481
3482 /* Time stamp */
3483 __net_timestamp(skb);
3484
3485 skb_queue_tail(&hdev->rx_q, skb);
3486 queue_work(hdev->workqueue, &hdev->rx_work);
3487
3488 return 0;
3489 }
3490 EXPORT_SYMBOL(hci_recv_frame);
3491
3492 /* Receive diagnostic message from HCI drivers */
3493 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3494 {
3495 /* Mark as diagnostic packet */
3496 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3497
3498 /* Time stamp */
3499 __net_timestamp(skb);
3500
3501 skb_queue_tail(&hdev->rx_q, skb);
3502 queue_work(hdev->workqueue, &hdev->rx_work);
3503
3504 return 0;
3505 }
3506 EXPORT_SYMBOL(hci_recv_diag);
3507
3508 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3509 {
3510 va_list vargs;
3511
3512 va_start(vargs, fmt);
3513 kfree_const(hdev->hw_info);
3514 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3515 va_end(vargs);
3516 }
3517 EXPORT_SYMBOL(hci_set_hw_info);
3518
3519 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3520 {
3521 va_list vargs;
3522
3523 va_start(vargs, fmt);
3524 kfree_const(hdev->fw_info);
3525 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3526 va_end(vargs);
3527 }
3528 EXPORT_SYMBOL(hci_set_fw_info);
3529
3530 /* ---- Interface to upper protocols ---- */
3531
3532 int hci_register_cb(struct hci_cb *cb)
3533 {
3534 BT_DBG("%p name %s", cb, cb->name);
3535
3536 mutex_lock(&hci_cb_list_lock);
3537 list_add_tail(&cb->list, &hci_cb_list);
3538 mutex_unlock(&hci_cb_list_lock);
3539
3540 return 0;
3541 }
3542 EXPORT_SYMBOL(hci_register_cb);
3543
3544 int hci_unregister_cb(struct hci_cb *cb)
3545 {
3546 BT_DBG("%p name %s", cb, cb->name);
3547
3548 mutex_lock(&hci_cb_list_lock);
3549 list_del(&cb->list);
3550 mutex_unlock(&hci_cb_list_lock);
3551
3552 return 0;
3553 }
3554 EXPORT_SYMBOL(hci_unregister_cb);
3555
3556 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3557 {
3558 int err;
3559
3560 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3561 skb->len);
3562
3563 /* Time stamp */
3564 __net_timestamp(skb);
3565
3566 /* Send copy to monitor */
3567 hci_send_to_monitor(hdev, skb);
3568
3569 if (atomic_read(&hdev->promisc)) {
3570 /* Send copy to the sockets */
3571 hci_send_to_sock(hdev, skb);
3572 }
3573
3574 /* Get rid of skb owner, prior to sending to the driver. */
3575 skb_orphan(skb);
3576
3577 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3578 kfree_skb(skb);
3579 return;
3580 }
3581
3582 err = hdev->send(hdev, skb);
3583 if (err < 0) {
3584 bt_dev_err(hdev, "sending frame failed (%d)", err);
3585 kfree_skb(skb);
3586 }
3587 }
3588
3589 /* Send HCI command */
3590 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3591 const void *param)
3592 {
3593 struct sk_buff *skb;
3594
3595 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3596
3597 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3598 if (!skb) {
3599 bt_dev_err(hdev, "no memory for command");
3600 return -ENOMEM;
3601 }
3602
3603 /* Stand-alone HCI commands must be flagged as
3604 * single-command requests.
3605 */
3606 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3607
3608 skb_queue_tail(&hdev->cmd_q, skb);
3609 queue_work(hdev->workqueue, &hdev->cmd_work);
3610
3611 return 0;
3612 }
3613
3614 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3615 const void *param)
3616 {
3617 struct sk_buff *skb;
3618
3619 if (hci_opcode_ogf(opcode) != 0x3f) {
3620 /* A controller receiving a command shall respond with either
3621 * a Command Status Event or a Command Complete Event.
3622 * Therefore, all standard HCI commands must be sent via the
3623 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3624 * Some vendors do not comply with this rule for vendor-specific
3625 * commands and do not return any event. We want to support
3626 * unresponded commands for such cases only.
3627 */
3628 bt_dev_err(hdev, "unresponded command not supported");
3629 return -EINVAL;
3630 }
3631
3632 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3633 if (!skb) {
3634 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3635 opcode);
3636 return -ENOMEM;
3637 }
3638
3639 hci_send_frame(hdev, skb);
3640
3641 return 0;
3642 }
3643 EXPORT_SYMBOL(__hci_cmd_send);
3644
3645 /* Get data from the previously sent command */
3646 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3647 {
3648 struct hci_command_hdr *hdr;
3649
3650 if (!hdev->sent_cmd)
3651 return NULL;
3652
3653 hdr = (void *) hdev->sent_cmd->data;
3654
3655 if (hdr->opcode != cpu_to_le16(opcode))
3656 return NULL;
3657
3658 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3659
3660 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3661 }
3662
3663 /* Send HCI command and wait for command commplete event */
3664 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3665 const void *param, u32 timeout)
3666 {
3667 struct sk_buff *skb;
3668
3669 if (!test_bit(HCI_UP, &hdev->flags))
3670 return ERR_PTR(-ENETDOWN);
3671
3672 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3673
3674 hci_req_sync_lock(hdev);
3675 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3676 hci_req_sync_unlock(hdev);
3677
3678 return skb;
3679 }
3680 EXPORT_SYMBOL(hci_cmd_sync);
3681
3682 /* Send ACL data */
3683 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3684 {
3685 struct hci_acl_hdr *hdr;
3686 int len = skb->len;
3687
3688 skb_push(skb, HCI_ACL_HDR_SIZE);
3689 skb_reset_transport_header(skb);
3690 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3691 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3692 hdr->dlen = cpu_to_le16(len);
3693 }
3694
3695 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3696 struct sk_buff *skb, __u16 flags)
3697 {
3698 struct hci_conn *conn = chan->conn;
3699 struct hci_dev *hdev = conn->hdev;
3700 struct sk_buff *list;
3701
3702 skb->len = skb_headlen(skb);
3703 skb->data_len = 0;
3704
3705 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3706
3707 switch (hdev->dev_type) {
3708 case HCI_PRIMARY:
3709 hci_add_acl_hdr(skb, conn->handle, flags);
3710 break;
3711 case HCI_AMP:
3712 hci_add_acl_hdr(skb, chan->handle, flags);
3713 break;
3714 default:
3715 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3716 return;
3717 }
3718
3719 list = skb_shinfo(skb)->frag_list;
3720 if (!list) {
3721 /* Non fragmented */
3722 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3723
3724 skb_queue_tail(queue, skb);
3725 } else {
3726 /* Fragmented */
3727 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3728
3729 skb_shinfo(skb)->frag_list = NULL;
3730
3731 /* Queue all fragments atomically. We need to use spin_lock_bh
3732 * here because of 6LoWPAN links, as there this function is
3733 * called from softirq and using normal spin lock could cause
3734 * deadlocks.
3735 */
3736 spin_lock_bh(&queue->lock);
3737
3738 __skb_queue_tail(queue, skb);
3739
3740 flags &= ~ACL_START;
3741 flags |= ACL_CONT;
3742 do {
3743 skb = list; list = list->next;
3744
3745 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3746 hci_add_acl_hdr(skb, conn->handle, flags);
3747
3748 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3749
3750 __skb_queue_tail(queue, skb);
3751 } while (list);
3752
3753 spin_unlock_bh(&queue->lock);
3754 }
3755 }
3756
3757 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3758 {
3759 struct hci_dev *hdev = chan->conn->hdev;
3760
3761 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3762
3763 hci_queue_acl(chan, &chan->data_q, skb, flags);
3764
3765 queue_work(hdev->workqueue, &hdev->tx_work);
3766 }
3767
3768 /* Send SCO data */
3769 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3770 {
3771 struct hci_dev *hdev = conn->hdev;
3772 struct hci_sco_hdr hdr;
3773
3774 BT_DBG("%s len %d", hdev->name, skb->len);
3775
3776 hdr.handle = cpu_to_le16(conn->handle);
3777 hdr.dlen = skb->len;
3778
3779 skb_push(skb, HCI_SCO_HDR_SIZE);
3780 skb_reset_transport_header(skb);
3781 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3782
3783 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3784
3785 skb_queue_tail(&conn->data_q, skb);
3786 queue_work(hdev->workqueue, &hdev->tx_work);
3787 }
3788
3789 /* ---- HCI TX task (outgoing data) ---- */
3790
3791 /* HCI Connection scheduler */
3792 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3793 int *quote)
3794 {
3795 struct hci_conn_hash *h = &hdev->conn_hash;
3796 struct hci_conn *conn = NULL, *c;
3797 unsigned int num = 0, min = ~0;
3798
3799 /* We don't have to lock device here. Connections are always
3800 * added and removed with TX task disabled. */
3801
3802 rcu_read_lock();
3803
3804 list_for_each_entry_rcu(c, &h->list, list) {
3805 if (c->type != type || skb_queue_empty(&c->data_q))
3806 continue;
3807
3808 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3809 continue;
3810
3811 num++;
3812
3813 if (c->sent < min) {
3814 min = c->sent;
3815 conn = c;
3816 }
3817
3818 if (hci_conn_num(hdev, type) == num)
3819 break;
3820 }
3821
3822 rcu_read_unlock();
3823
3824 if (conn) {
3825 int cnt, q;
3826
3827 switch (conn->type) {
3828 case ACL_LINK:
3829 cnt = hdev->acl_cnt;
3830 break;
3831 case SCO_LINK:
3832 case ESCO_LINK:
3833 cnt = hdev->sco_cnt;
3834 break;
3835 case LE_LINK:
3836 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3837 break;
3838 default:
3839 cnt = 0;
3840 bt_dev_err(hdev, "unknown link type %d", conn->type);
3841 }
3842
3843 q = cnt / num;
3844 *quote = q ? q : 1;
3845 } else
3846 *quote = 0;
3847
3848 BT_DBG("conn %p quote %d", conn, *quote);
3849 return conn;
3850 }
3851
3852 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3853 {
3854 struct hci_conn_hash *h = &hdev->conn_hash;
3855 struct hci_conn *c;
3856
3857 bt_dev_err(hdev, "link tx timeout");
3858
3859 rcu_read_lock();
3860
3861 /* Kill stalled connections */
3862 list_for_each_entry_rcu(c, &h->list, list) {
3863 if (c->type == type && c->sent) {
3864 bt_dev_err(hdev, "killing stalled connection %pMR",
3865 &c->dst);
3866 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3867 }
3868 }
3869
3870 rcu_read_unlock();
3871 }
3872
3873 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3874 int *quote)
3875 {
3876 struct hci_conn_hash *h = &hdev->conn_hash;
3877 struct hci_chan *chan = NULL;
3878 unsigned int num = 0, min = ~0, cur_prio = 0;
3879 struct hci_conn *conn;
3880 int cnt, q, conn_num = 0;
3881
3882 BT_DBG("%s", hdev->name);
3883
3884 rcu_read_lock();
3885
3886 list_for_each_entry_rcu(conn, &h->list, list) {
3887 struct hci_chan *tmp;
3888
3889 if (conn->type != type)
3890 continue;
3891
3892 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3893 continue;
3894
3895 conn_num++;
3896
3897 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3898 struct sk_buff *skb;
3899
3900 if (skb_queue_empty(&tmp->data_q))
3901 continue;
3902
3903 skb = skb_peek(&tmp->data_q);
3904 if (skb->priority < cur_prio)
3905 continue;
3906
3907 if (skb->priority > cur_prio) {
3908 num = 0;
3909 min = ~0;
3910 cur_prio = skb->priority;
3911 }
3912
3913 num++;
3914
3915 if (conn->sent < min) {
3916 min = conn->sent;
3917 chan = tmp;
3918 }
3919 }
3920
3921 if (hci_conn_num(hdev, type) == conn_num)
3922 break;
3923 }
3924
3925 rcu_read_unlock();
3926
3927 if (!chan)
3928 return NULL;
3929
3930 switch (chan->conn->type) {
3931 case ACL_LINK:
3932 cnt = hdev->acl_cnt;
3933 break;
3934 case AMP_LINK:
3935 cnt = hdev->block_cnt;
3936 break;
3937 case SCO_LINK:
3938 case ESCO_LINK:
3939 cnt = hdev->sco_cnt;
3940 break;
3941 case LE_LINK:
3942 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3943 break;
3944 default:
3945 cnt = 0;
3946 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
3947 }
3948
3949 q = cnt / num;
3950 *quote = q ? q : 1;
3951 BT_DBG("chan %p quote %d", chan, *quote);
3952 return chan;
3953 }
3954
3955 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3956 {
3957 struct hci_conn_hash *h = &hdev->conn_hash;
3958 struct hci_conn *conn;
3959 int num = 0;
3960
3961 BT_DBG("%s", hdev->name);
3962
3963 rcu_read_lock();
3964
3965 list_for_each_entry_rcu(conn, &h->list, list) {
3966 struct hci_chan *chan;
3967
3968 if (conn->type != type)
3969 continue;
3970
3971 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3972 continue;
3973
3974 num++;
3975
3976 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3977 struct sk_buff *skb;
3978
3979 if (chan->sent) {
3980 chan->sent = 0;
3981 continue;
3982 }
3983
3984 if (skb_queue_empty(&chan->data_q))
3985 continue;
3986
3987 skb = skb_peek(&chan->data_q);
3988 if (skb->priority >= HCI_PRIO_MAX - 1)
3989 continue;
3990
3991 skb->priority = HCI_PRIO_MAX - 1;
3992
3993 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3994 skb->priority);
3995 }
3996
3997 if (hci_conn_num(hdev, type) == num)
3998 break;
3999 }
4000
4001 rcu_read_unlock();
4002
4003 }
4004
4005 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4006 {
4007 /* Calculate count of blocks used by this packet */
4008 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4009 }
4010
4011 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4012 {
4013 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4014 /* ACL tx timeout must be longer than maximum
4015 * link supervision timeout (40.9 seconds) */
4016 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4017 HCI_ACL_TX_TIMEOUT))
4018 hci_link_tx_to(hdev, ACL_LINK);
4019 }
4020 }
4021
4022 static void hci_sched_acl_pkt(struct hci_dev *hdev)
4023 {
4024 unsigned int cnt = hdev->acl_cnt;
4025 struct hci_chan *chan;
4026 struct sk_buff *skb;
4027 int quote;
4028
4029 __check_timeout(hdev, cnt);
4030
4031 while (hdev->acl_cnt &&
4032 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
4033 u32 priority = (skb_peek(&chan->data_q))->priority;
4034 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4035 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4036 skb->len, skb->priority);
4037
4038 /* Stop if priority has changed */
4039 if (skb->priority < priority)
4040 break;
4041
4042 skb = skb_dequeue(&chan->data_q);
4043
4044 hci_conn_enter_active_mode(chan->conn,
4045 bt_cb(skb)->force_active);
4046
4047 hci_send_frame(hdev, skb);
4048 hdev->acl_last_tx = jiffies;
4049
4050 hdev->acl_cnt--;
4051 chan->sent++;
4052 chan->conn->sent++;
4053 }
4054 }
4055
4056 if (cnt != hdev->acl_cnt)
4057 hci_prio_recalculate(hdev, ACL_LINK);
4058 }
4059
4060 static void hci_sched_acl_blk(struct hci_dev *hdev)
4061 {
4062 unsigned int cnt = hdev->block_cnt;
4063 struct hci_chan *chan;
4064 struct sk_buff *skb;
4065 int quote;
4066 u8 type;
4067
4068 __check_timeout(hdev, cnt);
4069
4070 BT_DBG("%s", hdev->name);
4071
4072 if (hdev->dev_type == HCI_AMP)
4073 type = AMP_LINK;
4074 else
4075 type = ACL_LINK;
4076
4077 while (hdev->block_cnt > 0 &&
4078 (chan = hci_chan_sent(hdev, type, &quote))) {
4079 u32 priority = (skb_peek(&chan->data_q))->priority;
4080 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4081 int blocks;
4082
4083 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4084 skb->len, skb->priority);
4085
4086 /* Stop if priority has changed */
4087 if (skb->priority < priority)
4088 break;
4089
4090 skb = skb_dequeue(&chan->data_q);
4091
4092 blocks = __get_blocks(hdev, skb);
4093 if (blocks > hdev->block_cnt)
4094 return;
4095
4096 hci_conn_enter_active_mode(chan->conn,
4097 bt_cb(skb)->force_active);
4098
4099 hci_send_frame(hdev, skb);
4100 hdev->acl_last_tx = jiffies;
4101
4102 hdev->block_cnt -= blocks;
4103 quote -= blocks;
4104
4105 chan->sent += blocks;
4106 chan->conn->sent += blocks;
4107 }
4108 }
4109
4110 if (cnt != hdev->block_cnt)
4111 hci_prio_recalculate(hdev, type);
4112 }
4113
4114 static void hci_sched_acl(struct hci_dev *hdev)
4115 {
4116 BT_DBG("%s", hdev->name);
4117
4118 /* No ACL link over BR/EDR controller */
4119 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4120 return;
4121
4122 /* No AMP link over AMP controller */
4123 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4124 return;
4125
4126 switch (hdev->flow_ctl_mode) {
4127 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4128 hci_sched_acl_pkt(hdev);
4129 break;
4130
4131 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4132 hci_sched_acl_blk(hdev);
4133 break;
4134 }
4135 }
4136
4137 /* Schedule SCO */
4138 static void hci_sched_sco(struct hci_dev *hdev)
4139 {
4140 struct hci_conn *conn;
4141 struct sk_buff *skb;
4142 int quote;
4143
4144 BT_DBG("%s", hdev->name);
4145
4146 if (!hci_conn_num(hdev, SCO_LINK))
4147 return;
4148
4149 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
4150 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4151 BT_DBG("skb %p len %d", skb, skb->len);
4152 hci_send_frame(hdev, skb);
4153
4154 conn->sent++;
4155 if (conn->sent == ~0)
4156 conn->sent = 0;
4157 }
4158 }
4159 }
4160
4161 static void hci_sched_esco(struct hci_dev *hdev)
4162 {
4163 struct hci_conn *conn;
4164 struct sk_buff *skb;
4165 int quote;
4166
4167 BT_DBG("%s", hdev->name);
4168
4169 if (!hci_conn_num(hdev, ESCO_LINK))
4170 return;
4171
4172 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4173 &quote))) {
4174 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4175 BT_DBG("skb %p len %d", skb, skb->len);
4176 hci_send_frame(hdev, skb);
4177
4178 conn->sent++;
4179 if (conn->sent == ~0)
4180 conn->sent = 0;
4181 }
4182 }
4183 }
4184
4185 static void hci_sched_le(struct hci_dev *hdev)
4186 {
4187 struct hci_chan *chan;
4188 struct sk_buff *skb;
4189 int quote, cnt, tmp;
4190
4191 BT_DBG("%s", hdev->name);
4192
4193 if (!hci_conn_num(hdev, LE_LINK))
4194 return;
4195
4196 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4197 /* LE tx timeout must be longer than maximum
4198 * link supervision timeout (40.9 seconds) */
4199 if (!hdev->le_cnt && hdev->le_pkts &&
4200 time_after(jiffies, hdev->le_last_tx + HZ * 45))
4201 hci_link_tx_to(hdev, LE_LINK);
4202 }
4203
4204 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4205 tmp = cnt;
4206 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
4207 u32 priority = (skb_peek(&chan->data_q))->priority;
4208 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4209 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4210 skb->len, skb->priority);
4211
4212 /* Stop if priority has changed */
4213 if (skb->priority < priority)
4214 break;
4215
4216 skb = skb_dequeue(&chan->data_q);
4217
4218 hci_send_frame(hdev, skb);
4219 hdev->le_last_tx = jiffies;
4220
4221 cnt--;
4222 chan->sent++;
4223 chan->conn->sent++;
4224 }
4225 }
4226
4227 if (hdev->le_pkts)
4228 hdev->le_cnt = cnt;
4229 else
4230 hdev->acl_cnt = cnt;
4231
4232 if (cnt != tmp)
4233 hci_prio_recalculate(hdev, LE_LINK);
4234 }
4235
4236 static void hci_tx_work(struct work_struct *work)
4237 {
4238 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4239 struct sk_buff *skb;
4240
4241 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4242 hdev->sco_cnt, hdev->le_cnt);
4243
4244 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4245 /* Schedule queues and send stuff to HCI driver */
4246 hci_sched_acl(hdev);
4247 hci_sched_sco(hdev);
4248 hci_sched_esco(hdev);
4249 hci_sched_le(hdev);
4250 }
4251
4252 /* Send next queued raw (unknown type) packet */
4253 while ((skb = skb_dequeue(&hdev->raw_q)))
4254 hci_send_frame(hdev, skb);
4255 }
4256
4257 /* ----- HCI RX task (incoming data processing) ----- */
4258
4259 /* ACL data packet */
4260 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4261 {
4262 struct hci_acl_hdr *hdr = (void *) skb->data;
4263 struct hci_conn *conn;
4264 __u16 handle, flags;
4265
4266 skb_pull(skb, HCI_ACL_HDR_SIZE);
4267
4268 handle = __le16_to_cpu(hdr->handle);
4269 flags = hci_flags(handle);
4270 handle = hci_handle(handle);
4271
4272 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4273 handle, flags);
4274
4275 hdev->stat.acl_rx++;
4276
4277 hci_dev_lock(hdev);
4278 conn = hci_conn_hash_lookup_handle(hdev, handle);
4279 hci_dev_unlock(hdev);
4280
4281 if (conn) {
4282 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4283
4284 /* Send to upper protocol */
4285 l2cap_recv_acldata(conn, skb, flags);
4286 return;
4287 } else {
4288 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4289 handle);
4290 }
4291
4292 kfree_skb(skb);
4293 }
4294
4295 /* SCO data packet */
4296 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4297 {
4298 struct hci_sco_hdr *hdr = (void *) skb->data;
4299 struct hci_conn *conn;
4300 __u16 handle;
4301
4302 skb_pull(skb, HCI_SCO_HDR_SIZE);
4303
4304 handle = __le16_to_cpu(hdr->handle);
4305
4306 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4307
4308 hdev->stat.sco_rx++;
4309
4310 hci_dev_lock(hdev);
4311 conn = hci_conn_hash_lookup_handle(hdev, handle);
4312 hci_dev_unlock(hdev);
4313
4314 if (conn) {
4315 /* Send to upper protocol */
4316 sco_recv_scodata(conn, skb);
4317 return;
4318 } else {
4319 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4320 handle);
4321 }
4322
4323 kfree_skb(skb);
4324 }
4325
4326 static bool hci_req_is_complete(struct hci_dev *hdev)
4327 {
4328 struct sk_buff *skb;
4329
4330 skb = skb_peek(&hdev->cmd_q);
4331 if (!skb)
4332 return true;
4333
4334 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4335 }
4336
4337 static void hci_resend_last(struct hci_dev *hdev)
4338 {
4339 struct hci_command_hdr *sent;
4340 struct sk_buff *skb;
4341 u16 opcode;
4342
4343 if (!hdev->sent_cmd)
4344 return;
4345
4346 sent = (void *) hdev->sent_cmd->data;
4347 opcode = __le16_to_cpu(sent->opcode);
4348 if (opcode == HCI_OP_RESET)
4349 return;
4350
4351 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4352 if (!skb)
4353 return;
4354
4355 skb_queue_head(&hdev->cmd_q, skb);
4356 queue_work(hdev->workqueue, &hdev->cmd_work);
4357 }
4358
4359 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4360 hci_req_complete_t *req_complete,
4361 hci_req_complete_skb_t *req_complete_skb)
4362 {
4363 struct sk_buff *skb;
4364 unsigned long flags;
4365
4366 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4367
4368 /* If the completed command doesn't match the last one that was
4369 * sent we need to do special handling of it.
4370 */
4371 if (!hci_sent_cmd_data(hdev, opcode)) {
4372 /* Some CSR based controllers generate a spontaneous
4373 * reset complete event during init and any pending
4374 * command will never be completed. In such a case we
4375 * need to resend whatever was the last sent
4376 * command.
4377 */
4378 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4379 hci_resend_last(hdev);
4380
4381 return;
4382 }
4383
4384 /* If we reach this point this event matches the last command sent */
4385 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4386
4387 /* If the command succeeded and there's still more commands in
4388 * this request the request is not yet complete.
4389 */
4390 if (!status && !hci_req_is_complete(hdev))
4391 return;
4392
4393 /* If this was the last command in a request the complete
4394 * callback would be found in hdev->sent_cmd instead of the
4395 * command queue (hdev->cmd_q).
4396 */
4397 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4398 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4399 return;
4400 }
4401
4402 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4403 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4404 return;
4405 }
4406
4407 /* Remove all pending commands belonging to this request */
4408 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4409 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4410 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4411 __skb_queue_head(&hdev->cmd_q, skb);
4412 break;
4413 }
4414
4415 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4416 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4417 else
4418 *req_complete = bt_cb(skb)->hci.req_complete;
4419 kfree_skb(skb);
4420 }
4421 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4422 }
4423
4424 static void hci_rx_work(struct work_struct *work)
4425 {
4426 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4427 struct sk_buff *skb;
4428
4429 BT_DBG("%s", hdev->name);
4430
4431 while ((skb = skb_dequeue(&hdev->rx_q))) {
4432 /* Send copy to monitor */
4433 hci_send_to_monitor(hdev, skb);
4434
4435 if (atomic_read(&hdev->promisc)) {
4436 /* Send copy to the sockets */
4437 hci_send_to_sock(hdev, skb);
4438 }
4439
4440 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4441 kfree_skb(skb);
4442 continue;
4443 }
4444
4445 if (test_bit(HCI_INIT, &hdev->flags)) {
4446 /* Don't process data packets in this states. */
4447 switch (hci_skb_pkt_type(skb)) {
4448 case HCI_ACLDATA_PKT:
4449 case HCI_SCODATA_PKT:
4450 kfree_skb(skb);
4451 continue;
4452 }
4453 }
4454
4455 /* Process frame */
4456 switch (hci_skb_pkt_type(skb)) {
4457 case HCI_EVENT_PKT:
4458 BT_DBG("%s Event packet", hdev->name);
4459 hci_event_packet(hdev, skb);
4460 break;
4461
4462 case HCI_ACLDATA_PKT:
4463 BT_DBG("%s ACL data packet", hdev->name);
4464 hci_acldata_packet(hdev, skb);
4465 break;
4466
4467 case HCI_SCODATA_PKT:
4468 BT_DBG("%s SCO data packet", hdev->name);
4469 hci_scodata_packet(hdev, skb);
4470 break;
4471
4472 default:
4473 kfree_skb(skb);
4474 break;
4475 }
4476 }
4477 }
4478
4479 static void hci_cmd_work(struct work_struct *work)
4480 {
4481 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4482 struct sk_buff *skb;
4483
4484 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4485 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4486
4487 /* Send queued commands */
4488 if (atomic_read(&hdev->cmd_cnt)) {
4489 skb = skb_dequeue(&hdev->cmd_q);
4490 if (!skb)
4491 return;
4492
4493 kfree_skb(hdev->sent_cmd);
4494
4495 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4496 if (hdev->sent_cmd) {
4497 if (hci_req_status_pend(hdev))
4498 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4499 atomic_dec(&hdev->cmd_cnt);
4500 hci_send_frame(hdev, skb);
4501 if (test_bit(HCI_RESET, &hdev->flags))
4502 cancel_delayed_work(&hdev->cmd_timer);
4503 else
4504 schedule_delayed_work(&hdev->cmd_timer,
4505 HCI_CMD_TIMEOUT);
4506 } else {
4507 skb_queue_head(&hdev->cmd_q, skb);
4508 queue_work(hdev->workqueue, &hdev->cmd_work);
4509 }
4510 }
4511 }
Linux with added FPC-III support