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Merge remote-tracking branch 'asoc/fix/intel' into asoc-linus
[deliverable/linux.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 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
8e87d142
YH		 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
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
8c520a59 28#include <linux/export.h>
3df92b31 29#include <linux/idr.h>
8c520a59 30#include <linux/rfkill.h>
baf27f6e 31#include <linux/debugfs.h>
99780a7b 32#include <linux/crypto.h>
47219839 33#include <asm/unaligned.h>
1da177e4
LT		 34
35#include <net/bluetooth/bluetooth.h>
36#include <net/bluetooth/hci_core.h>
4bc58f51 37#include <net/bluetooth/l2cap.h>
af58925c 38#include <net/bluetooth/mgmt.h>
1da177e4 39
0857dd3b 40#include "hci_request.h"
60c5f5fb 41#include "hci_debugfs.h"
970c4e46 42#include "smp.h"
6d5d2ee6 43#include "leds.h"
970c4e46 44
b78752cc 45static void hci_rx_work(struct work_struct *work);
c347b765 46static void hci_cmd_work(struct work_struct *work);
3eff45ea 47static void hci_tx_work(struct work_struct *work);
1da177e4 48
1da177e4
LT		 49/* HCI device list */
50LIST_HEAD(hci_dev_list);
51DEFINE_RWLOCK(hci_dev_list_lock);
52
53/* HCI callback list */
54LIST_HEAD(hci_cb_list);
fba7ecf0 55DEFINE_MUTEX(hci_cb_list_lock);
1da177e4 56
3df92b31
SL		 57/* HCI ID Numbering */
58static DEFINE_IDA(hci_index_ida);
59
baf27f6e
MH		 60/* ---- HCI debugfs entries ---- */
61
4b4148e9
MH		 62static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
63 size_t count, loff_t *ppos)
64{
65 struct hci_dev *hdev = file->private_data;
66 char buf[3];
67
74b93e9f 68 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
4b4148e9
MH		 69 buf[1] = '\n';
70 buf[2] = '\0';
71 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
72}
73
74static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
75 size_t count, loff_t *ppos)
76{
77 struct hci_dev *hdev = file->private_data;
78 struct sk_buff *skb;
79 char buf[32];
80 size_t buf_size = min(count, (sizeof(buf)-1));
81 bool enable;
4b4148e9
MH		 82
83 if (!test_bit(HCI_UP, &hdev->flags))
84 return -ENETDOWN;
85
86 if (copy_from_user(buf, user_buf, buf_size))
87 return -EFAULT;
88
89 buf[buf_size] = '\0';
90 if (strtobool(buf, &enable))
91 return -EINVAL;
92
b7cb93e5 93 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
4b4148e9
MH		 94 return -EALREADY;
95
b504430c 96 hci_req_sync_lock(hdev);
4b4148e9
MH		 97 if (enable)
98 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
99 HCI_CMD_TIMEOUT);
100 else
101 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
102 HCI_CMD_TIMEOUT);
b504430c 103 hci_req_sync_unlock(hdev);
4b4148e9
MH		 104
105 if (IS_ERR(skb))
106 return PTR_ERR(skb);
107
4b4148e9
MH		 108 kfree_skb(skb);
109
b7cb93e5 110 hci_dev_change_flag(hdev, HCI_DUT_MODE);
4b4148e9
MH		 111
112 return count;
113}
114
115static const struct file_operations dut_mode_fops = {
116 .open = simple_open,
117 .read = dut_mode_read,
118 .write = dut_mode_write,
119 .llseek = default_llseek,
120};
121
4b4113d6
MH		 122static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
123 size_t count, loff_t *ppos)
124{
125 struct hci_dev *hdev = file->private_data;
126 char buf[3];
127
74b93e9f 128 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
4b4113d6
MH		 129 buf[1] = '\n';
130 buf[2] = '\0';
131 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
132}
133
134static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
135 size_t count, loff_t *ppos)
136{
137 struct hci_dev *hdev = file->private_data;
138 char buf[32];
139 size_t buf_size = min(count, (sizeof(buf)-1));
140 bool enable;
141 int err;
142
143 if (copy_from_user(buf, user_buf, buf_size))
144 return -EFAULT;
145
146 buf[buf_size] = '\0';
147 if (strtobool(buf, &enable))
148 return -EINVAL;
149
7e995b9e
MH		 150 /* When the diagnostic flags are not persistent and the transport
151 * is not active, then there is no need for the vendor callback.
152 *
153 * Instead just store the desired value. If needed the setting
154 * will be programmed when the controller gets powered on.
155 */
156 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
157 !test_bit(HCI_RUNNING, &hdev->flags))
158 goto done;
159
b504430c 160 hci_req_sync_lock(hdev);
4b4113d6 161 err = hdev->set_diag(hdev, enable);
b504430c 162 hci_req_sync_unlock(hdev);
4b4113d6
MH		 163
164 if (err < 0)
165 return err;
166
7e995b9e 167done:
4b4113d6
MH		 168 if (enable)
169 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
170 else
171 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
172
173 return count;
174}
175
176static const struct file_operations vendor_diag_fops = {
177 .open = simple_open,
178 .read = vendor_diag_read,
179 .write = vendor_diag_write,
180 .llseek = default_llseek,
181};
182
f640ee98
MH		 183static void hci_debugfs_create_basic(struct hci_dev *hdev)
184{
185 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
186 &dut_mode_fops);
187
188 if (hdev->set_diag)
189 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
190 &vendor_diag_fops);
191}
192
a1d01db1 193static int hci_reset_req(struct hci_request *req, unsigned long opt)
1da177e4 194{
42c6b129 195 BT_DBG("%s %ld", req->hdev->name, opt);
1da177e4
LT		 196
197 /* Reset device */
42c6b129
JH		 198 set_bit(HCI_RESET, &req->hdev->flags);
199 hci_req_add(req, HCI_OP_RESET, 0, NULL);
a1d01db1 200 return 0;
1da177e4
LT		 201}
202
42c6b129 203static void bredr_init(struct hci_request *req)
1da177e4 204{
42c6b129 205 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
2455a3ea 206
1da177e4 207 /* Read Local Supported Features */
42c6b129 208 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 209
1143e5a6 210 /* Read Local Version */
42c6b129 211 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
2177bab5
JH		 212
213 /* Read BD Address */
42c6b129 214 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
1da177e4
LT		 215}
216
0af801b9 217static void amp_init1(struct hci_request *req)
e61ef499 218{
42c6b129 219 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
2455a3ea 220
e61ef499 221 /* Read Local Version */
42c6b129 222 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489 223
f6996cfe
MH		 224 /* Read Local Supported Commands */
225 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
226
6bcbc489 227 /* Read Local AMP Info */
42c6b129 228 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e71dfaba
AE		 229
230 /* Read Data Blk size */
42c6b129 231 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
7528ca1c 232
f38ba941
MH		 233 /* Read Flow Control Mode */
234 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
235
7528ca1c
MH		 236 /* Read Location Data */
237 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
e61ef499
AE		 238}
239
a1d01db1 240static int amp_init2(struct hci_request *req)
0af801b9
JH		 241{
242 /* Read Local Supported Features. Not all AMP controllers
243 * support this so it's placed conditionally in the second
244 * stage init.
245 */
246 if (req->hdev->commands[14] & 0x20)
247 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
a1d01db1
JH		 248
249 return 0;
0af801b9
JH		 250}
251
a1d01db1 252static int hci_init1_req(struct hci_request *req, unsigned long opt)
e61ef499 253{
42c6b129 254 struct hci_dev *hdev = req->hdev;
e61ef499
AE		 255
256 BT_DBG("%s %ld", hdev->name, opt);
257
11778716
AE		 258 /* Reset */
259 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
42c6b129 260 hci_reset_req(req, 0);
11778716 261
e61ef499 262 switch (hdev->dev_type) {
ca8bee5d 263 case HCI_PRIMARY:
42c6b129 264 bredr_init(req);
e61ef499 265 break;
e61ef499 266 case HCI_AMP:
0af801b9 267 amp_init1(req);
e61ef499 268 break;
e61ef499
AE		 269 default:
270 BT_ERR("Unknown device type %d", hdev->dev_type);
271 break;
272 }
a1d01db1
JH		 273
274 return 0;
e61ef499
AE		 275}
276
42c6b129 277static void bredr_setup(struct hci_request *req)
2177bab5 278{
2177bab5
JH		 279 __le16 param;
280 __u8 flt_type;
281
282 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
42c6b129 283 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 284
285 /* Read Class of Device */
42c6b129 286 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
2177bab5
JH		 287
288 /* Read Local Name */
42c6b129 289 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
2177bab5
JH		 290
291 /* Read Voice Setting */
42c6b129 292 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
2177bab5 293
b4cb9fb2
MH		 294 /* Read Number of Supported IAC */
295 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
296
4b836f39
MH		 297 /* Read Current IAC LAP */
298 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
299
2177bab5
JH		 300 /* Clear Event Filters */
301 flt_type = HCI_FLT_CLEAR_ALL;
42c6b129 302 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
2177bab5
JH		 303
304 /* Connection accept timeout ~20 secs */
dcf4adbf 305 param = cpu_to_le16(0x7d00);
42c6b129 306 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
2177bab5
JH		 307}
308
42c6b129 309static void le_setup(struct hci_request *req)
2177bab5 310{
c73eee91
JH		 311 struct hci_dev *hdev = req->hdev;
312
2177bab5 313 /* Read LE Buffer Size */
42c6b129 314 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
2177bab5
JH		 315
316 /* Read LE Local Supported Features */
42c6b129 317 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
2177bab5 318
747d3f03
MH		 319 /* Read LE Supported States */
320 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
321
c73eee91
JH		 322 /* LE-only controllers have LE implicitly enabled */
323 if (!lmp_bredr_capable(hdev))
a1536da2 324 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2177bab5
JH		 325}
326
42c6b129 327static void hci_setup_event_mask(struct hci_request *req)
2177bab5 328{
42c6b129
JH		 329 struct hci_dev *hdev = req->hdev;
330
2177bab5
JH		 331 /* The second byte is 0xff instead of 0x9f (two reserved bits
332 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
333 * command otherwise.
334 */
335 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
336
337 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
338 * any event mask for pre 1.2 devices.
339 */
340 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
341 return;
342
343 if (lmp_bredr_capable(hdev)) {
344 events[4] |= 0x01; /* Flow Specification Complete */
c7882cbd
MH		 345 } else {
346 /* Use a different default for LE-only devices */
347 memset(events, 0, sizeof(events));
c7882cbd
MH		 348 events[1] |= 0x20; /* Command Complete */
349 events[1] |= 0x40; /* Command Status */
350 events[1] |= 0x80; /* Hardware Error */
5c3d3b4c
MH		 351
352 /* If the controller supports the Disconnect command, enable
353 * the corresponding event. In addition enable packet flow
354 * control related events.
355 */
356 if (hdev->commands[0] & 0x20) {
357 events[0] |= 0x10; /* Disconnection Complete */
358 events[2] |= 0x04; /* Number of Completed Packets */
359 events[3] |= 0x02; /* Data Buffer Overflow */
360 }
361
362 /* If the controller supports the Read Remote Version
363 * Information command, enable the corresponding event.
364 */
365 if (hdev->commands[2] & 0x80)
366 events[1] |= 0x08; /* Read Remote Version Information
367 * Complete
368 */
0da71f1b
MH		 369
370 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
371 events[0] |= 0x80; /* Encryption Change */
372 events[5] |= 0x80; /* Encryption Key Refresh Complete */
373 }
2177bab5
JH		 374 }
375
9fe759ce
MH		 376 if (lmp_inq_rssi_capable(hdev) ||
377 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
2177bab5
JH		 378 events[4] |= 0x02; /* Inquiry Result with RSSI */
379
70f56aa2
MH		 380 if (lmp_ext_feat_capable(hdev))
381 events[4] |= 0x04; /* Read Remote Extended Features Complete */
382
383 if (lmp_esco_capable(hdev)) {
384 events[5] |= 0x08; /* Synchronous Connection Complete */
385 events[5] |= 0x10; /* Synchronous Connection Changed */
386 }
387
2177bab5
JH		 388 if (lmp_sniffsubr_capable(hdev))
389 events[5] |= 0x20; /* Sniff Subrating */
390
391 if (lmp_pause_enc_capable(hdev))
392 events[5] |= 0x80; /* Encryption Key Refresh Complete */
393
394 if (lmp_ext_inq_capable(hdev))
395 events[5] |= 0x40; /* Extended Inquiry Result */
396
397 if (lmp_no_flush_capable(hdev))
398 events[7] |= 0x01; /* Enhanced Flush Complete */
399
400 if (lmp_lsto_capable(hdev))
401 events[6] |= 0x80; /* Link Supervision Timeout Changed */
402
403 if (lmp_ssp_capable(hdev)) {
404 events[6] |= 0x01; /* IO Capability Request */
405 events[6] |= 0x02; /* IO Capability Response */
406 events[6] |= 0x04; /* User Confirmation Request */
407 events[6] |= 0x08; /* User Passkey Request */
408 events[6] |= 0x10; /* Remote OOB Data Request */
409 events[6] |= 0x20; /* Simple Pairing Complete */
410 events[7] |= 0x04; /* User Passkey Notification */
411 events[7] |= 0x08; /* Keypress Notification */
412 events[7] |= 0x10; /* Remote Host Supported
413 * Features Notification
414 */
415 }
416
417 if (lmp_le_capable(hdev))
418 events[7] |= 0x20; /* LE Meta-Event */
419
42c6b129 420 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
2177bab5
JH		 421}
422
a1d01db1 423static int hci_init2_req(struct hci_request *req, unsigned long opt)
2177bab5 424{
42c6b129
JH		 425 struct hci_dev *hdev = req->hdev;
426
0af801b9
JH		 427 if (hdev->dev_type == HCI_AMP)
428 return amp_init2(req);
429
2177bab5 430 if (lmp_bredr_capable(hdev))
42c6b129 431 bredr_setup(req);
56f87901 432 else
a358dc11 433 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
2177bab5
JH		 434
435 if (lmp_le_capable(hdev))
42c6b129 436 le_setup(req);
2177bab5 437
0f3adeae
MH		 438 /* All Bluetooth 1.2 and later controllers should support the
439 * HCI command for reading the local supported commands.
440 *
441 * Unfortunately some controllers indicate Bluetooth 1.2 support,
442 * but do not have support for this command. If that is the case,
443 * the driver can quirk the behavior and skip reading the local
444 * supported commands.
3f8e2d75 445 */
0f3adeae
MH		 446 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
447 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
42c6b129 448 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
2177bab5
JH		 449
450 if (lmp_ssp_capable(hdev)) {
57af75a8
MH		 451 /* When SSP is available, then the host features page
452 * should also be available as well. However some
453 * controllers list the max_page as 0 as long as SSP
454 * has not been enabled. To achieve proper debugging
455 * output, force the minimum max_page to 1 at least.
456 */
457 hdev->max_page = 0x01;
458
d7a5a11d 459 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
2177bab5 460 u8 mode = 0x01;
574ea3c7 461
42c6b129
JH		 462 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
463 sizeof(mode), &mode);
2177bab5
JH		 464 } else {
465 struct hci_cp_write_eir cp;
466
467 memset(hdev->eir, 0, sizeof(hdev->eir));
468 memset(&cp, 0, sizeof(cp));
469
42c6b129 470 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
2177bab5
JH		 471 }
472 }
473
043ec9bf
MH		 474 if (lmp_inq_rssi_capable(hdev) ||
475 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
04422da9
MH		 476 u8 mode;
477
478 /* If Extended Inquiry Result events are supported, then
479 * they are clearly preferred over Inquiry Result with RSSI
480 * events.
481 */
482 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
483
484 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
485 }
2177bab5
JH		 486
487 if (lmp_inq_tx_pwr_capable(hdev))
42c6b129 488 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
2177bab5
JH		 489
490 if (lmp_ext_feat_capable(hdev)) {
491 struct hci_cp_read_local_ext_features cp;
492
493 cp.page = 0x01;
42c6b129
JH		 494 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
495 sizeof(cp), &cp);
2177bab5
JH		 496 }
497
d7a5a11d 498 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
2177bab5 499 u8 enable = 1;
42c6b129
JH		 500 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
501 &enable);
2177bab5 502 }
a1d01db1
JH		 503
504 return 0;
2177bab5
JH		 505}
506
42c6b129 507static void hci_setup_link_policy(struct hci_request *req)
2177bab5 508{
42c6b129 509 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 510 struct hci_cp_write_def_link_policy cp;
511 u16 link_policy = 0;
512
513 if (lmp_rswitch_capable(hdev))
514 link_policy |= HCI_LP_RSWITCH;
515 if (lmp_hold_capable(hdev))
516 link_policy |= HCI_LP_HOLD;
517 if (lmp_sniff_capable(hdev))
518 link_policy |= HCI_LP_SNIFF;
519 if (lmp_park_capable(hdev))
520 link_policy |= HCI_LP_PARK;
521
522 cp.policy = cpu_to_le16(link_policy);
42c6b129 523 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
2177bab5
JH		 524}
525
42c6b129 526static void hci_set_le_support(struct hci_request *req)
2177bab5 527{
42c6b129 528 struct hci_dev *hdev = req->hdev;
2177bab5
JH		 529 struct hci_cp_write_le_host_supported cp;
530
c73eee91
JH		 531 /* LE-only devices do not support explicit enablement */
532 if (!lmp_bredr_capable(hdev))
533 return;
534
2177bab5
JH		 535 memset(&cp, 0, sizeof(cp));
536
d7a5a11d 537 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
2177bab5 538 cp.le = 0x01;
32226e4f 539 cp.simul = 0x00;
2177bab5
JH		 540 }
541
542 if (cp.le != lmp_host_le_capable(hdev))
42c6b129
JH		 543 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
544 &cp);
2177bab5
JH		 545}
546
d62e6d67
JH		 547static void hci_set_event_mask_page_2(struct hci_request *req)
548{
549 struct hci_dev *hdev = req->hdev;
550 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
551
552 /* If Connectionless Slave Broadcast master role is supported
553 * enable all necessary events for it.
554 */
53b834d2 555 if (lmp_csb_master_capable(hdev)) {
d62e6d67
JH		 556 events[1] |= 0x40; /* Triggered Clock Capture */
557 events[1] |= 0x80; /* Synchronization Train Complete */
558 events[2] |= 0x10; /* Slave Page Response Timeout */
559 events[2] |= 0x20; /* CSB Channel Map Change */
560 }
561
562 /* If Connectionless Slave Broadcast slave role is supported
563 * enable all necessary events for it.
564 */
53b834d2 565 if (lmp_csb_slave_capable(hdev)) {
d62e6d67
JH		 566 events[2] |= 0x01; /* Synchronization Train Received */
567 events[2] |= 0x02; /* CSB Receive */
568 events[2] |= 0x04; /* CSB Timeout */
569 events[2] |= 0x08; /* Truncated Page Complete */
570 }
571
40c59fcb 572 /* Enable Authenticated Payload Timeout Expired event if supported */
cd7ca0ec 573 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
40c59fcb
MH		 574 events[2] |= 0x80;
575
d62e6d67
JH		 576 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
577}
578
a1d01db1 579static int hci_init3_req(struct hci_request *req, unsigned long opt)
2177bab5 580{
42c6b129 581 struct hci_dev *hdev = req->hdev;
d2c5d77f 582 u8 p;
42c6b129 583
0da71f1b
MH		 584 hci_setup_event_mask(req);
585
e81be90b
JH		 586 if (hdev->commands[6] & 0x20 &&
587 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
48ce62c4
MH		 588 struct hci_cp_read_stored_link_key cp;
589
590 bacpy(&cp.bdaddr, BDADDR_ANY);
591 cp.read_all = 0x01;
592 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
593 }
594
2177bab5 595 if (hdev->commands[5] & 0x10)
42c6b129 596 hci_setup_link_policy(req);
2177bab5 597
417287de
MH		 598 if (hdev->commands[8] & 0x01)
599 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
600
601 /* Some older Broadcom based Bluetooth 1.2 controllers do not
602 * support the Read Page Scan Type command. Check support for
603 * this command in the bit mask of supported commands.
604 */
605 if (hdev->commands[13] & 0x01)
606 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
607
9193c6e8
AG		 608 if (lmp_le_capable(hdev)) {
609 u8 events[8];
610
611 memset(events, 0, sizeof(events));
4d6c705b
MH		 612
613 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
614 events[0] |= 0x10; /* LE Long Term Key Request */
662bc2e6
AG		 615
616 /* If controller supports the Connection Parameters Request
617 * Link Layer Procedure, enable the corresponding event.
618 */
619 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
620 events[0] |= 0x20; /* LE Remote Connection
621 * Parameter Request
622 */
623
a9f6068e
MH		 624 /* If the controller supports the Data Length Extension
625 * feature, enable the corresponding event.
626 */
627 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
628 events[0] |= 0x40; /* LE Data Length Change */
629
4b71bba4
MH		 630 /* If the controller supports Extended Scanner Filter
631 * Policies, enable the correspondig event.
632 */
633 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
634 events[1] |= 0x04; /* LE Direct Advertising
635 * Report
636 */
637
7d26f5c4
MH		 638 /* If the controller supports the LE Set Scan Enable command,
639 * enable the corresponding advertising report event.
640 */
641 if (hdev->commands[26] & 0x08)
642 events[0] |= 0x02; /* LE Advertising Report */
643
644 /* If the controller supports the LE Create Connection
645 * command, enable the corresponding event.
646 */
647 if (hdev->commands[26] & 0x10)
648 events[0] |= 0x01; /* LE Connection Complete */
649
650 /* If the controller supports the LE Connection Update
651 * command, enable the corresponding event.
652 */
653 if (hdev->commands[27] & 0x04)
654 events[0] |= 0x04; /* LE Connection Update
655 * Complete
656 */
657
658 /* If the controller supports the LE Read Remote Used Features
659 * command, enable the corresponding event.
660 */
661 if (hdev->commands[27] & 0x20)
662 events[0] |= 0x08; /* LE Read Remote Used
663 * Features Complete
664 */
665
5a34bd5f
MH		 666 /* If the controller supports the LE Read Local P-256
667 * Public Key command, enable the corresponding event.
668 */
669 if (hdev->commands[34] & 0x02)
670 events[0] |= 0x80; /* LE Read Local P-256
671 * Public Key Complete
672 */
673
674 /* If the controller supports the LE Generate DHKey
675 * command, enable the corresponding event.
676 */
677 if (hdev->commands[34] & 0x04)
678 events[1] |= 0x01; /* LE Generate DHKey Complete */
679
9193c6e8
AG		 680 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
681 events);
682
15a49cca
MH		 683 if (hdev->commands[25] & 0x40) {
684 /* Read LE Advertising Channel TX Power */
685 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
686 }
687
2ab216a7
MH		 688 if (hdev->commands[26] & 0x40) {
689 /* Read LE White List Size */
690 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
691 0, NULL);
692 }
693
694 if (hdev->commands[26] & 0x80) {
695 /* Clear LE White List */
696 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
697 }
698
a9f6068e
MH		 699 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
700 /* Read LE Maximum Data Length */
701 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
702
703 /* Read LE Suggested Default Data Length */
704 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
705 }
706
42c6b129 707 hci_set_le_support(req);
9193c6e8 708 }
d2c5d77f
JH		 709
710 /* Read features beyond page 1 if available */
711 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
712 struct hci_cp_read_local_ext_features cp;
713
714 cp.page = p;
715 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
716 sizeof(cp), &cp);
717 }
a1d01db1
JH		 718
719 return 0;
2177bab5
JH		 720}
721
a1d01db1 722static int hci_init4_req(struct hci_request *req, unsigned long opt)
5d4e7e8d
JH		 723{
724 struct hci_dev *hdev = req->hdev;
725
36f260ce
MH		 726 /* Some Broadcom based Bluetooth controllers do not support the
727 * Delete Stored Link Key command. They are clearly indicating its
728 * absence in the bit mask of supported commands.
729 *
730 * Check the supported commands and only if the the command is marked
731 * as supported send it. If not supported assume that the controller
732 * does not have actual support for stored link keys which makes this
733 * command redundant anyway.
734 *
735 * Some controllers indicate that they support handling deleting
736 * stored link keys, but they don't. The quirk lets a driver
737 * just disable this command.
738 */
739 if (hdev->commands[6] & 0x80 &&
740 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
741 struct hci_cp_delete_stored_link_key cp;
742
743 bacpy(&cp.bdaddr, BDADDR_ANY);
744 cp.delete_all = 0x01;
745 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
746 sizeof(cp), &cp);
747 }
748
d62e6d67
JH		 749 /* Set event mask page 2 if the HCI command for it is supported */
750 if (hdev->commands[22] & 0x04)
751 hci_set_event_mask_page_2(req);
752
109e3191
MH		 753 /* Read local codec list if the HCI command is supported */
754 if (hdev->commands[29] & 0x20)
755 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
756
f4fe73ed
MH		 757 /* Get MWS transport configuration if the HCI command is supported */
758 if (hdev->commands[30] & 0x08)
759 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
760
5d4e7e8d 761 /* Check for Synchronization Train support */
53b834d2 762 if (lmp_sync_train_capable(hdev))
5d4e7e8d 763 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
a6d0d690
MH		 764
765 /* Enable Secure Connections if supported and configured */
d7a5a11d 766 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
574ea3c7 767 bredr_sc_enabled(hdev)) {
a6d0d690 768 u8 support = 0x01;
574ea3c7 769
a6d0d690
MH		 770 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
771 sizeof(support), &support);
772 }
a1d01db1
JH		 773
774 return 0;
5d4e7e8d
JH		 775}
776
2177bab5
JH		 777static int __hci_init(struct hci_dev *hdev)
778{
779 int err;
780
4ebeee2d 781 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
2177bab5
JH		 782 if (err < 0)
783 return err;
784
f640ee98
MH		 785 if (hci_dev_test_flag(hdev, HCI_SETUP))
786 hci_debugfs_create_basic(hdev);
4b4148e9 787
4ebeee2d 788 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
0af801b9
JH		 789 if (err < 0)
790 return err;
791
ca8bee5d 792 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
2177bab5 793 * BR/EDR/LE type controllers. AMP controllers only need the
0af801b9 794 * first two stages of init.
2177bab5 795 */
ca8bee5d 796 if (hdev->dev_type != HCI_PRIMARY)
2177bab5
JH		 797 return 0;
798
4ebeee2d 799 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
5d4e7e8d
JH		 800 if (err < 0)
801 return err;
802
4ebeee2d 803 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
baf27f6e
MH		 804 if (err < 0)
805 return err;
806
ec6cef9c
MH		 807 /* This function is only called when the controller is actually in
808 * configured state. When the controller is marked as unconfigured,
809 * this initialization procedure is not run.
810 *
811 * It means that it is possible that a controller runs through its
812 * setup phase and then discovers missing settings. If that is the
813 * case, then this function will not be called. It then will only
814 * be called during the config phase.
815 *
816 * So only when in setup phase or config phase, create the debugfs
817 * entries and register the SMP channels.
baf27f6e 818 */
d7a5a11d
MH		 819 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
820 !hci_dev_test_flag(hdev, HCI_CONFIG))
baf27f6e
MH		 821 return 0;
822
60c5f5fb
MH		 823 hci_debugfs_create_common(hdev);
824
71c3b60e 825 if (lmp_bredr_capable(hdev))
60c5f5fb 826 hci_debugfs_create_bredr(hdev);
2bfa3531 827
162a3bac 828 if (lmp_le_capable(hdev))
60c5f5fb 829 hci_debugfs_create_le(hdev);
e7b8fc92 830
baf27f6e 831 return 0;
2177bab5
JH		 832}
833
a1d01db1 834static int hci_init0_req(struct hci_request *req, unsigned long opt)
0ebca7d6
MH		 835{
836 struct hci_dev *hdev = req->hdev;
837
838 BT_DBG("%s %ld", hdev->name, opt);
839
840 /* Reset */
841 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
842 hci_reset_req(req, 0);
843
844 /* Read Local Version */
845 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
846
847 /* Read BD Address */
848 if (hdev->set_bdaddr)
849 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
a1d01db1
JH		 850
851 return 0;
0ebca7d6
MH		 852}
853
854static int __hci_unconf_init(struct hci_dev *hdev)
855{
856 int err;
857
cc78b44b
MH		 858 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
859 return 0;
860
4ebeee2d 861 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
0ebca7d6
MH		 862 if (err < 0)
863 return err;
864
f640ee98
MH		 865 if (hci_dev_test_flag(hdev, HCI_SETUP))
866 hci_debugfs_create_basic(hdev);
867
0ebca7d6
MH		 868 return 0;
869}
870
a1d01db1 871static int hci_scan_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 872{
873 __u8 scan = opt;
874
42c6b129 875 BT_DBG("%s %x", req->hdev->name, scan);
1da177e4
LT		 876
877 /* Inquiry and Page scans */
42c6b129 878 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
a1d01db1 879 return 0;
1da177e4
LT		 880}
881
a1d01db1 882static int hci_auth_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 883{
884 __u8 auth = opt;
885
42c6b129 886 BT_DBG("%s %x", req->hdev->name, auth);
1da177e4
LT		 887
888 /* Authentication */
42c6b129 889 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
a1d01db1 890 return 0;
1da177e4
LT		 891}
892
a1d01db1 893static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 894{
895 __u8 encrypt = opt;
896
42c6b129 897 BT_DBG("%s %x", req->hdev->name, encrypt);
1da177e4 898
e4e8e37c 899 /* Encryption */
42c6b129 900 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
a1d01db1 901 return 0;
1da177e4
LT		 902}
903
a1d01db1 904static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
e4e8e37c
MH		 905{
906 __le16 policy = cpu_to_le16(opt);
907
42c6b129 908 BT_DBG("%s %x", req->hdev->name, policy);
e4e8e37c
MH		 909
910 /* Default link policy */
42c6b129 911 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
a1d01db1 912 return 0;
e4e8e37c
MH		 913}
914
8e87d142 915/* Get HCI device by index.
1da177e4
LT		 916 * Device is held on return. */
917struct hci_dev *hci_dev_get(int index)
918{
8035ded4 919 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 920
921 BT_DBG("%d", index);
922
923 if (index < 0)
924 return NULL;
925
926 read_lock(&hci_dev_list_lock);
8035ded4 927 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 928 if (d->id == index) {
929 hdev = hci_dev_hold(d);
930 break;
931 }
932 }
933 read_unlock(&hci_dev_list_lock);
934 return hdev;
935}
1da177e4
LT		 936
937/* ---- Inquiry support ---- */
ff9ef578 938
30dc78e1
JH		 939bool hci_discovery_active(struct hci_dev *hdev)
940{
941 struct discovery_state *discov = &hdev->discovery;
942
6fbe195d 943 switch (discov->state) {
343f935b 944 case DISCOVERY_FINDING:
6fbe195d 945 case DISCOVERY_RESOLVING:
30dc78e1
JH		 946 return true;
947
6fbe195d
AG		 948 default:
949 return false;
950 }
30dc78e1
JH		 951}
952
ff9ef578
JH		 953void hci_discovery_set_state(struct hci_dev *hdev, int state)
954{
bb3e0a33
JH		 955 int old_state = hdev->discovery.state;
956
ff9ef578
JH		 957 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
958
bb3e0a33 959 if (old_state == state)
ff9ef578
JH		 960 return;
961
bb3e0a33
JH		 962 hdev->discovery.state = state;
963
ff9ef578
JH		 964 switch (state) {
965 case DISCOVERY_STOPPED:
c54c3860
AG		 966 hci_update_background_scan(hdev);
967
bb3e0a33 968 if (old_state != DISCOVERY_STARTING)
7b99b659 969 mgmt_discovering(hdev, 0);
ff9ef578
JH		 970 break;
971 case DISCOVERY_STARTING:
972 break;
343f935b 973 case DISCOVERY_FINDING:
ff9ef578
JH		 974 mgmt_discovering(hdev, 1);
975 break;
30dc78e1
JH		 976 case DISCOVERY_RESOLVING:
977 break;
ff9ef578
JH		 978 case DISCOVERY_STOPPING:
979 break;
980 }
ff9ef578
JH		 981}
982
1f9b9a5d 983void hci_inquiry_cache_flush(struct hci_dev *hdev)
1da177e4 984{
30883512 985 struct discovery_state *cache = &hdev->discovery;
b57c1a56 986 struct inquiry_entry *p, *n;
1da177e4 987
561aafbc
JH		 988 list_for_each_entry_safe(p, n, &cache->all, all) {
989 list_del(&p->all);
b57c1a56 990 kfree(p);
1da177e4 991 }
561aafbc
JH		 992
993 INIT_LIST_HEAD(&cache->unknown);
994 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 995}
996
a8c5fb1a
GP		 997struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
998 bdaddr_t *bdaddr)
1da177e4 999{
30883512 1000 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 1001 struct inquiry_entry *e;
1002
6ed93dc6 1003 BT_DBG("cache %p, %pMR", cache, bdaddr);
1da177e4 1004
561aafbc
JH		 1005 list_for_each_entry(e, &cache->all, all) {
1006 if (!bacmp(&e->data.bdaddr, bdaddr))
1007 return e;
1008 }
1009
1010 return NULL;
1011}
1012
1013struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 1014 bdaddr_t *bdaddr)
561aafbc 1015{
30883512 1016 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 1017 struct inquiry_entry *e;
1018
6ed93dc6 1019 BT_DBG("cache %p, %pMR", cache, bdaddr);
561aafbc
JH		 1020
1021 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 1022 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 1023 return e;
1024 }
1025
1026 return NULL;
1da177e4
LT		 1027}
1028
30dc78e1 1029struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 1030 bdaddr_t *bdaddr,
1031 int state)
30dc78e1
JH		 1032{
1033 struct discovery_state *cache = &hdev->discovery;
1034 struct inquiry_entry *e;
1035
6ed93dc6 1036 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
30dc78e1
JH		 1037
1038 list_for_each_entry(e, &cache->resolve, list) {
1039 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1040 return e;
1041 if (!bacmp(&e->data.bdaddr, bdaddr))
1042 return e;
1043 }
1044
1045 return NULL;
1046}
1047
a3d4e20a 1048void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 1049 struct inquiry_entry *ie)
a3d4e20a
JH		 1050{
1051 struct discovery_state *cache = &hdev->discovery;
1052 struct list_head *pos = &cache->resolve;
1053 struct inquiry_entry *p;
1054
1055 list_del(&ie->list);
1056
1057 list_for_each_entry(p, &cache->resolve, list) {
1058 if (p->name_state != NAME_PENDING &&
a8c5fb1a 1059 abs(p->data.rssi) >= abs(ie->data.rssi))
a3d4e20a
JH		 1060 break;
1061 pos = &p->list;
1062 }
1063
1064 list_add(&ie->list, pos);
1065}
1066
af58925c
MH		 1067u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1068 bool name_known)
1da177e4 1069{
30883512 1070 struct discovery_state *cache = &hdev->discovery;
70f23020 1071 struct inquiry_entry *ie;
af58925c 1072 u32 flags = 0;
1da177e4 1073
6ed93dc6 1074 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1da177e4 1075
6928a924 1076 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
2b2fec4d 1077
af58925c
MH		 1078 if (!data->ssp_mode)
1079 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
388fc8fa 1080
70f23020 1081 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 1082 if (ie) {
af58925c
MH		 1083 if (!ie->data.ssp_mode)
1084 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
388fc8fa 1085
a3d4e20a 1086 if (ie->name_state == NAME_NEEDED &&
a8c5fb1a 1087 data->rssi != ie->data.rssi) {
a3d4e20a
JH		 1088 ie->data.rssi = data->rssi;
1089 hci_inquiry_cache_update_resolve(hdev, ie);
1090 }
1091
561aafbc 1092 goto update;
a3d4e20a 1093 }
561aafbc
JH		 1094
1095 /* Entry not in the cache. Add new one. */
27f70f3e 1096 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
af58925c
MH		 1097 if (!ie) {
1098 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1099 goto done;
1100 }
561aafbc
JH		 1101
1102 list_add(&ie->all, &cache->all);
1103
1104 if (name_known) {
1105 ie->name_state = NAME_KNOWN;
1106 } else {
1107 ie->name_state = NAME_NOT_KNOWN;
1108 list_add(&ie->list, &cache->unknown);
1109 }
70f23020 1110
561aafbc
JH		 1111update:
1112 if (name_known && ie->name_state != NAME_KNOWN &&
a8c5fb1a 1113 ie->name_state != NAME_PENDING) {
561aafbc
JH		 1114 ie->name_state = NAME_KNOWN;
1115 list_del(&ie->list);
1da177e4
LT		 1116 }
1117
70f23020
AE		 1118 memcpy(&ie->data, data, sizeof(*data));
1119 ie->timestamp = jiffies;
1da177e4 1120 cache->timestamp = jiffies;
3175405b
JH		 1121
1122 if (ie->name_state == NAME_NOT_KNOWN)
af58925c 1123 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
3175405b 1124
af58925c
MH		 1125done:
1126 return flags;
1da177e4
LT		 1127}
1128
1129static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1130{
30883512 1131 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 1132 struct inquiry_info *info = (struct inquiry_info *) buf;
1133 struct inquiry_entry *e;
1134 int copied = 0;
1135
561aafbc 1136 list_for_each_entry(e, &cache->all, all) {
1da177e4 1137 struct inquiry_data *data = &e->data;
b57c1a56
JH		 1138
1139 if (copied >= num)
1140 break;
1141
1da177e4
LT		 1142 bacpy(&info->bdaddr, &data->bdaddr);
1143 info->pscan_rep_mode = data->pscan_rep_mode;
1144 info->pscan_period_mode = data->pscan_period_mode;
1145 info->pscan_mode = data->pscan_mode;
1146 memcpy(info->dev_class, data->dev_class, 3);
1147 info->clock_offset = data->clock_offset;
b57c1a56 1148
1da177e4 1149 info++;
b57c1a56 1150 copied++;
1da177e4
LT		 1151 }
1152
1153 BT_DBG("cache %p, copied %d", cache, copied);
1154 return copied;
1155}
1156
a1d01db1 1157static int hci_inq_req(struct hci_request *req, unsigned long opt)
1da177e4
LT		 1158{
1159 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
42c6b129 1160 struct hci_dev *hdev = req->hdev;
1da177e4
LT		 1161 struct hci_cp_inquiry cp;
1162
1163 BT_DBG("%s", hdev->name);
1164
1165 if (test_bit(HCI_INQUIRY, &hdev->flags))
a1d01db1 1166 return 0;
1da177e4
LT		 1167
1168 /* Start Inquiry */
1169 memcpy(&cp.lap, &ir->lap, 3);
1170 cp.length = ir->length;
1171 cp.num_rsp = ir->num_rsp;
42c6b129 1172 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
a1d01db1
JH		 1173
1174 return 0;
1da177e4
LT		 1175}
1176
1177int hci_inquiry(void __user *arg)
1178{
1179 __u8 __user *ptr = arg;
1180 struct hci_inquiry_req ir;
1181 struct hci_dev *hdev;
1182 int err = 0, do_inquiry = 0, max_rsp;
1183 long timeo;
1184 __u8 *buf;
1185
1186 if (copy_from_user(&ir, ptr, sizeof(ir)))
1187 return -EFAULT;
1188
5a08ecce
AE		 1189 hdev = hci_dev_get(ir.dev_id);
1190 if (!hdev)
1da177e4
LT		 1191 return -ENODEV;
1192
d7a5a11d 1193 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1194 err = -EBUSY;
1195 goto done;
1196 }
1197
d7a5a11d 1198 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
fee746b0
MH		 1199 err = -EOPNOTSUPP;
1200 goto done;
1201 }
1202
ca8bee5d 1203 if (hdev->dev_type != HCI_PRIMARY) {
5b69bef5
MH		 1204 err = -EOPNOTSUPP;
1205 goto done;
1206 }
1207
d7a5a11d 1208 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
56f87901
JH		 1209 err = -EOPNOTSUPP;
1210 goto done;
1211 }
1212
09fd0de5 1213 hci_dev_lock(hdev);
8e87d142 1214 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
a8c5fb1a 1215 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1f9b9a5d 1216 hci_inquiry_cache_flush(hdev);
1da177e4
LT		 1217 do_inquiry = 1;
1218 }
09fd0de5 1219 hci_dev_unlock(hdev);
1da177e4 1220
04837f64 1221 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 1222
1223 if (do_inquiry) {
01178cd4 1224 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
4ebeee2d 1225 timeo, NULL);
70f23020
AE		 1226 if (err < 0)
1227 goto done;
3e13fa1e
AG		 1228
1229 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1230 * cleared). If it is interrupted by a signal, return -EINTR.
1231 */
74316201 1232 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
3e13fa1e
AG		 1233 TASK_INTERRUPTIBLE))
1234 return -EINTR;
70f23020 1235 }
1da177e4 1236
8fc9ced3
GP		 1237 /* for unlimited number of responses we will use buffer with
1238 * 255 entries
1239 */
1da177e4
LT		 1240 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1241
1242 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1243 * copy it to the user space.
1244 */
01df8c31 1245 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 1246 if (!buf) {
1da177e4
LT		 1247 err = -ENOMEM;
1248 goto done;
1249 }
1250
09fd0de5 1251 hci_dev_lock(hdev);
1da177e4 1252 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 1253 hci_dev_unlock(hdev);
1da177e4
LT		 1254
1255 BT_DBG("num_rsp %d", ir.num_rsp);
1256
1257 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1258 ptr += sizeof(ir);
1259 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
a8c5fb1a 1260 ir.num_rsp))
1da177e4 1261 err = -EFAULT;
8e87d142 1262 } else
1da177e4
LT		 1263 err = -EFAULT;
1264
1265 kfree(buf);
1266
1267done:
1268 hci_dev_put(hdev);
1269 return err;
1270}
1271
cbed0ca1 1272static int hci_dev_do_open(struct hci_dev *hdev)
1da177e4 1273{
1da177e4
LT		 1274 int ret = 0;
1275
1da177e4
LT		 1276 BT_DBG("%s %p", hdev->name, hdev);
1277
b504430c 1278 hci_req_sync_lock(hdev);
1da177e4 1279
d7a5a11d 1280 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
94324962
JH		 1281 ret = -ENODEV;
1282 goto done;
1283 }
1284
d7a5a11d
MH		 1285 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1286 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
a5c8f270
MH		 1287 /* Check for rfkill but allow the HCI setup stage to
1288 * proceed (which in itself doesn't cause any RF activity).
1289 */
d7a5a11d 1290 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
a5c8f270
MH		 1291 ret = -ERFKILL;
1292 goto done;
1293 }
1294
1295 /* Check for valid public address or a configured static
1296 * random adddress, but let the HCI setup proceed to
1297 * be able to determine if there is a public address
1298 * or not.
1299 *
c6beca0e
MH		 1300 * In case of user channel usage, it is not important
1301 * if a public address or static random address is
1302 * available.
1303 *
a5c8f270
MH		 1304 * This check is only valid for BR/EDR controllers
1305 * since AMP controllers do not have an address.
1306 */
d7a5a11d 1307 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
ca8bee5d 1308 hdev->dev_type == HCI_PRIMARY &&
a5c8f270
MH		 1309 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1310 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1311 ret = -EADDRNOTAVAIL;
1312 goto done;
1313 }
611b30f7
MH		 1314 }
1315
1da177e4
LT		 1316 if (test_bit(HCI_UP, &hdev->flags)) {
1317 ret = -EALREADY;
1318 goto done;
1319 }
1320
1da177e4
LT		 1321 if (hdev->open(hdev)) {
1322 ret = -EIO;
1323 goto done;
1324 }
1325
e9ca8bf1 1326 set_bit(HCI_RUNNING, &hdev->flags);
05fcd4c4 1327 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
4a3f95b7 1328
f41c70c4
MH		 1329 atomic_set(&hdev->cmd_cnt, 1);
1330 set_bit(HCI_INIT, &hdev->flags);
1331
d7a5a11d 1332 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
e131d74a
MH		 1333 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1334
af202f84
MH		 1335 if (hdev->setup)
1336 ret = hdev->setup(hdev);
f41c70c4 1337
af202f84
MH		 1338 /* The transport driver can set these quirks before
1339 * creating the HCI device or in its setup callback.
1340 *
1341 * In case any of them is set, the controller has to
1342 * start up as unconfigured.
1343 */
eb1904f4
MH		 1344 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1345 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
a1536da2 1346 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
f41c70c4 1347
0ebca7d6
MH		 1348 /* For an unconfigured controller it is required to
1349 * read at least the version information provided by
1350 * the Read Local Version Information command.
1351 *
1352 * If the set_bdaddr driver callback is provided, then
1353 * also the original Bluetooth public device address
1354 * will be read using the Read BD Address command.
1355 */
d7a5a11d 1356 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
0ebca7d6 1357 ret = __hci_unconf_init(hdev);
89bc22d2
MH		 1358 }
1359
d7a5a11d 1360 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
9713c17b
MH		 1361 /* If public address change is configured, ensure that
1362 * the address gets programmed. If the driver does not
1363 * support changing the public address, fail the power
1364 * on procedure.
1365 */
1366 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1367 hdev->set_bdaddr)
24c457e2
MH		 1368 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1369 else
1370 ret = -EADDRNOTAVAIL;
1371 }
1372
f41c70c4 1373 if (!ret) {
d7a5a11d 1374 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
98a63aaf 1375 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
f41c70c4 1376 ret = __hci_init(hdev);
98a63aaf
MH		 1377 if (!ret && hdev->post_init)
1378 ret = hdev->post_init(hdev);
1379 }
1da177e4
LT		 1380 }
1381
7e995b9e
MH		 1382 /* If the HCI Reset command is clearing all diagnostic settings,
1383 * then they need to be reprogrammed after the init procedure
1384 * completed.
1385 */
1386 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1387 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1388 ret = hdev->set_diag(hdev, true);
1389
f41c70c4
MH		 1390 clear_bit(HCI_INIT, &hdev->flags);
1391
1da177e4
LT		 1392 if (!ret) {
1393 hci_dev_hold(hdev);
a1536da2 1394 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1da177e4 1395 set_bit(HCI_UP, &hdev->flags);
05fcd4c4 1396 hci_sock_dev_event(hdev, HCI_DEV_UP);
6d5d2ee6 1397 hci_leds_update_powered(hdev, true);
d7a5a11d
MH		 1398 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1399 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1400 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1401 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
2ff13894 1402 hci_dev_test_flag(hdev, HCI_MGMT) &&
ca8bee5d 1403 hdev->dev_type == HCI_PRIMARY) {
2ff13894
JH		 1404 ret = __hci_req_hci_power_on(hdev);
1405 mgmt_power_on(hdev, ret);
56e5cb86 1406 }
8e87d142 1407 } else {
1da177e4 1408 /* Init failed, cleanup */
3eff45ea 1409 flush_work(&hdev->tx_work);
c347b765 1410 flush_work(&hdev->cmd_work);
b78752cc 1411 flush_work(&hdev->rx_work);
1da177e4
LT		 1412
1413 skb_queue_purge(&hdev->cmd_q);
1414 skb_queue_purge(&hdev->rx_q);
1415
1416 if (hdev->flush)
1417 hdev->flush(hdev);
1418
1419 if (hdev->sent_cmd) {
1420 kfree_skb(hdev->sent_cmd);
1421 hdev->sent_cmd = NULL;
1422 }
1423
e9ca8bf1 1424 clear_bit(HCI_RUNNING, &hdev->flags);
05fcd4c4 1425 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4a3f95b7 1426
1da177e4 1427 hdev->close(hdev);
fee746b0 1428 hdev->flags &= BIT(HCI_RAW);
1da177e4
LT		 1429 }
1430
1431done:
b504430c 1432 hci_req_sync_unlock(hdev);
1da177e4
LT		 1433 return ret;
1434}
1435
cbed0ca1
JH		 1436/* ---- HCI ioctl helpers ---- */
1437
1438int hci_dev_open(__u16 dev)
1439{
1440 struct hci_dev *hdev;
1441 int err;
1442
1443 hdev = hci_dev_get(dev);
1444 if (!hdev)
1445 return -ENODEV;
1446
4a964404 1447 /* Devices that are marked as unconfigured can only be powered
fee746b0
MH		 1448 * up as user channel. Trying to bring them up as normal devices
1449 * will result into a failure. Only user channel operation is
1450 * possible.
1451 *
1452 * When this function is called for a user channel, the flag
1453 * HCI_USER_CHANNEL will be set first before attempting to
1454 * open the device.
1455 */
d7a5a11d
MH		 1456 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1457 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
fee746b0
MH		 1458 err = -EOPNOTSUPP;
1459 goto done;
1460 }
1461
e1d08f40
JH		 1462 /* We need to ensure that no other power on/off work is pending
1463 * before proceeding to call hci_dev_do_open. This is
1464 * particularly important if the setup procedure has not yet
1465 * completed.
1466 */
a69d8927 1467 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
e1d08f40
JH		 1468 cancel_delayed_work(&hdev->power_off);
1469
a5c8f270
MH		 1470 /* After this call it is guaranteed that the setup procedure
1471 * has finished. This means that error conditions like RFKILL
1472 * or no valid public or static random address apply.
1473 */
e1d08f40
JH		 1474 flush_workqueue(hdev->req_workqueue);
1475
12aa4f0a 1476 /* For controllers not using the management interface and that
b6ae8457 1477 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
12aa4f0a
MH		 1478 * so that pairing works for them. Once the management interface
1479 * is in use this bit will be cleared again and userspace has
1480 * to explicitly enable it.
1481 */
d7a5a11d
MH		 1482 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1483 !hci_dev_test_flag(hdev, HCI_MGMT))
a1536da2 1484 hci_dev_set_flag(hdev, HCI_BONDABLE);
12aa4f0a 1485
cbed0ca1
JH		 1486 err = hci_dev_do_open(hdev);
1487
fee746b0 1488done:
cbed0ca1 1489 hci_dev_put(hdev);
cbed0ca1
JH		 1490 return err;
1491}
1492
d7347f3c
JH		 1493/* This function requires the caller holds hdev->lock */
1494static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1495{
1496 struct hci_conn_params *p;
1497
f161dd41
JH		 1498 list_for_each_entry(p, &hdev->le_conn_params, list) {
1499 if (p->conn) {
1500 hci_conn_drop(p->conn);
f8aaf9b6 1501 hci_conn_put(p->conn);
f161dd41
JH		 1502 p->conn = NULL;
1503 }
d7347f3c 1504 list_del_init(&p->action);
f161dd41 1505 }
d7347f3c
JH		 1506
1507 BT_DBG("All LE pending actions cleared");
1508}
1509
6b3cc1db 1510int hci_dev_do_close(struct hci_dev *hdev)
1da177e4 1511{
acc649c6
MH		 1512 bool auto_off;
1513
1da177e4
LT		 1514 BT_DBG("%s %p", hdev->name, hdev);
1515
d24d8144 1516 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
867146a0 1517 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
d24d8144 1518 test_bit(HCI_UP, &hdev->flags)) {
a44fecbd
THJA		 1519 /* Execute vendor specific shutdown routine */
1520 if (hdev->shutdown)
1521 hdev->shutdown(hdev);
1522 }
1523
78c04c0b
VCG		 1524 cancel_delayed_work(&hdev->power_off);
1525
7df0f73e 1526 hci_request_cancel_all(hdev);
b504430c 1527 hci_req_sync_lock(hdev);
1da177e4
LT		 1528
1529 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
65cc2b49 1530 cancel_delayed_work_sync(&hdev->cmd_timer);
b504430c 1531 hci_req_sync_unlock(hdev);
1da177e4
LT		 1532 return 0;
1533 }
1534
6d5d2ee6
HK		 1535 hci_leds_update_powered(hdev, false);
1536
3eff45ea
GP		 1537 /* Flush RX and TX works */
1538 flush_work(&hdev->tx_work);
b78752cc 1539 flush_work(&hdev->rx_work);
1da177e4 1540
16ab91ab 1541 if (hdev->discov_timeout > 0) {
16ab91ab 1542 hdev->discov_timeout = 0;
a358dc11
MH		 1543 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1544 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
16ab91ab
JH		 1545 }
1546
a69d8927 1547 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
7d78525d
JH		 1548 cancel_delayed_work(&hdev->service_cache);
1549
d7a5a11d 1550 if (hci_dev_test_flag(hdev, HCI_MGMT))
4518bb0f 1551 cancel_delayed_work_sync(&hdev->rpa_expired);
7ba8b4be 1552
76727c02
JH		 1553 /* Avoid potential lockdep warnings from the *_flush() calls by
1554 * ensuring the workqueue is empty up front.
1555 */
1556 drain_workqueue(hdev->workqueue);
1557
09fd0de5 1558 hci_dev_lock(hdev);
1aeb9c65 1559
8f502f84
JH		 1560 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1561
acc649c6
MH		 1562 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1563
ca8bee5d 1564 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
2ff13894
JH		 1565 hci_dev_test_flag(hdev, HCI_MGMT))
1566 __mgmt_power_off(hdev);
1aeb9c65 1567
1f9b9a5d 1568 hci_inquiry_cache_flush(hdev);
d7347f3c 1569 hci_pend_le_actions_clear(hdev);
f161dd41 1570 hci_conn_hash_flush(hdev);
09fd0de5 1571 hci_dev_unlock(hdev);
1da177e4 1572
64dae967
MH		 1573 smp_unregister(hdev);
1574
05fcd4c4 1575 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1da177e4
LT		 1576
1577 if (hdev->flush)
1578 hdev->flush(hdev);
1579
1580 /* Reset device */
1581 skb_queue_purge(&hdev->cmd_q);
1582 atomic_set(&hdev->cmd_cnt, 1);
acc649c6
MH		 1583 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1584 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1da177e4 1585 set_bit(HCI_INIT, &hdev->flags);
4ebeee2d 1586 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1da177e4
LT		 1587 clear_bit(HCI_INIT, &hdev->flags);
1588 }
1589
c347b765
GP		 1590 /* flush cmd work */
1591 flush_work(&hdev->cmd_work);
1da177e4
LT		 1592
1593 /* Drop queues */
1594 skb_queue_purge(&hdev->rx_q);
1595 skb_queue_purge(&hdev->cmd_q);
1596 skb_queue_purge(&hdev->raw_q);
1597
1598 /* Drop last sent command */
1599 if (hdev->sent_cmd) {
65cc2b49 1600 cancel_delayed_work_sync(&hdev->cmd_timer);
1da177e4
LT		 1601 kfree_skb(hdev->sent_cmd);
1602 hdev->sent_cmd = NULL;
1603 }
1604
e9ca8bf1 1605 clear_bit(HCI_RUNNING, &hdev->flags);
05fcd4c4 1606 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4a3f95b7 1607
1da177e4
LT		 1608 /* After this point our queues are empty
1609 * and no tasks are scheduled. */
1610 hdev->close(hdev);
1611
35b973c9 1612 /* Clear flags */
fee746b0 1613 hdev->flags &= BIT(HCI_RAW);
eacb44df 1614 hci_dev_clear_volatile_flags(hdev);
35b973c9 1615
ced5c338 1616 /* Controller radio is available but is currently powered down */
536619e8 1617 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 1618
e59fda8d 1619 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1620 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
7a4cd51d 1621 bacpy(&hdev->random_addr, BDADDR_ANY);
e59fda8d 1622
b504430c 1623 hci_req_sync_unlock(hdev);
1da177e4
LT		 1624
1625 hci_dev_put(hdev);
1626 return 0;
1627}
1628
1629int hci_dev_close(__u16 dev)
1630{
1631 struct hci_dev *hdev;
1632 int err;
1633
70f23020
AE		 1634 hdev = hci_dev_get(dev);
1635 if (!hdev)
1da177e4 1636 return -ENODEV;
8ee56540 1637
d7a5a11d 1638 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1639 err = -EBUSY;
1640 goto done;
1641 }
1642
a69d8927 1643 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
8ee56540
MH		 1644 cancel_delayed_work(&hdev->power_off);
1645
1da177e4 1646 err = hci_dev_do_close(hdev);
8ee56540 1647
0736cfa8 1648done:
1da177e4
LT		 1649 hci_dev_put(hdev);
1650 return err;
1651}
1652
5c912495 1653static int hci_dev_do_reset(struct hci_dev *hdev)
1da177e4 1654{
5c912495 1655 int ret;
1da177e4 1656
5c912495 1657 BT_DBG("%s %p", hdev->name, hdev);
1da177e4 1658
b504430c 1659 hci_req_sync_lock(hdev);
1da177e4 1660
1da177e4
LT		 1661 /* Drop queues */
1662 skb_queue_purge(&hdev->rx_q);
1663 skb_queue_purge(&hdev->cmd_q);
1664
76727c02
JH		 1665 /* Avoid potential lockdep warnings from the *_flush() calls by
1666 * ensuring the workqueue is empty up front.
1667 */
1668 drain_workqueue(hdev->workqueue);
1669
09fd0de5 1670 hci_dev_lock(hdev);
1f9b9a5d 1671 hci_inquiry_cache_flush(hdev);
1da177e4 1672 hci_conn_hash_flush(hdev);
09fd0de5 1673 hci_dev_unlock(hdev);
1da177e4
LT		 1674
1675 if (hdev->flush)
1676 hdev->flush(hdev);
1677
8e87d142 1678 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1679 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4 1680
4ebeee2d 1681 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1da177e4 1682
b504430c 1683 hci_req_sync_unlock(hdev);
1da177e4
LT		 1684 return ret;
1685}
1686
5c912495
MH		 1687int hci_dev_reset(__u16 dev)
1688{
1689 struct hci_dev *hdev;
1690 int err;
1691
1692 hdev = hci_dev_get(dev);
1693 if (!hdev)
1694 return -ENODEV;
1695
1696 if (!test_bit(HCI_UP, &hdev->flags)) {
1697 err = -ENETDOWN;
1698 goto done;
1699 }
1700
d7a5a11d 1701 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5c912495
MH		 1702 err = -EBUSY;
1703 goto done;
1704 }
1705
d7a5a11d 1706 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5c912495
MH		 1707 err = -EOPNOTSUPP;
1708 goto done;
1709 }
1710
1711 err = hci_dev_do_reset(hdev);
1712
1713done:
1714 hci_dev_put(hdev);
1715 return err;
1716}
1717
1da177e4
LT		 1718int hci_dev_reset_stat(__u16 dev)
1719{
1720 struct hci_dev *hdev;
1721 int ret = 0;
1722
70f23020
AE		 1723 hdev = hci_dev_get(dev);
1724 if (!hdev)
1da177e4
LT		 1725 return -ENODEV;
1726
d7a5a11d 1727 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1728 ret = -EBUSY;
1729 goto done;
1730 }
1731
d7a5a11d 1732 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
fee746b0
MH		 1733 ret = -EOPNOTSUPP;
1734 goto done;
1735 }
1736
1da177e4
LT		 1737 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1738
0736cfa8 1739done:
1da177e4 1740 hci_dev_put(hdev);
1da177e4
LT		 1741 return ret;
1742}
1743
123abc08
JH		 1744static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1745{
bc6d2d04 1746 bool conn_changed, discov_changed;
123abc08
JH		 1747
1748 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1749
1750 if ((scan & SCAN_PAGE))
238be788
MH		 1751 conn_changed = !hci_dev_test_and_set_flag(hdev,
1752 HCI_CONNECTABLE);
123abc08 1753 else
a69d8927
MH		 1754 conn_changed = hci_dev_test_and_clear_flag(hdev,
1755 HCI_CONNECTABLE);
123abc08 1756
bc6d2d04 1757 if ((scan & SCAN_INQUIRY)) {
238be788
MH		 1758 discov_changed = !hci_dev_test_and_set_flag(hdev,
1759 HCI_DISCOVERABLE);
bc6d2d04 1760 } else {
a358dc11 1761 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
a69d8927
MH		 1762 discov_changed = hci_dev_test_and_clear_flag(hdev,
1763 HCI_DISCOVERABLE);
bc6d2d04
JH		 1764 }
1765
d7a5a11d 1766 if (!hci_dev_test_flag(hdev, HCI_MGMT))
123abc08
JH		 1767 return;
1768
bc6d2d04
JH		 1769 if (conn_changed || discov_changed) {
1770 /* In case this was disabled through mgmt */
a1536da2 1771 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
bc6d2d04 1772
d7a5a11d 1773 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
cab054ab 1774 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
bc6d2d04 1775
123abc08 1776 mgmt_new_settings(hdev);
bc6d2d04 1777 }
123abc08
JH		 1778}
1779
1da177e4
LT		 1780int hci_dev_cmd(unsigned int cmd, void __user *arg)
1781{
1782 struct hci_dev *hdev;
1783 struct hci_dev_req dr;
1784 int err = 0;
1785
1786 if (copy_from_user(&dr, arg, sizeof(dr)))
1787 return -EFAULT;
1788
70f23020
AE		 1789 hdev = hci_dev_get(dr.dev_id);
1790 if (!hdev)
1da177e4
LT		 1791 return -ENODEV;
1792
d7a5a11d 1793 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1794 err = -EBUSY;
1795 goto done;
1796 }
1797
d7a5a11d 1798 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
fee746b0
MH		 1799 err = -EOPNOTSUPP;
1800 goto done;
1801 }
1802
ca8bee5d 1803 if (hdev->dev_type != HCI_PRIMARY) {
5b69bef5
MH		 1804 err = -EOPNOTSUPP;
1805 goto done;
1806 }
1807
d7a5a11d 1808 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
56f87901
JH		 1809 err = -EOPNOTSUPP;
1810 goto done;
1811 }
1812
1da177e4
LT		 1813 switch (cmd) {
1814 case HCISETAUTH:
01178cd4 1815 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
4ebeee2d 1816 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1817 break;
1818
1819 case HCISETENCRYPT:
1820 if (!lmp_encrypt_capable(hdev)) {
1821 err = -EOPNOTSUPP;
1822 break;
1823 }
1824
1825 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1826 /* Auth must be enabled first */
01178cd4 1827 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
4ebeee2d 1828 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1829 if (err)
1830 break;
1831 }
1832
01178cd4 1833 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
4ebeee2d 1834 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1835 break;
1836
1837 case HCISETSCAN:
01178cd4 1838 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
4ebeee2d 1839 HCI_INIT_TIMEOUT, NULL);
91a668b0 1840
bc6d2d04
JH		 1841 /* Ensure that the connectable and discoverable states
1842 * get correctly modified as this was a non-mgmt change.
91a668b0 1843 */
123abc08
JH		 1844 if (!err)
1845 hci_update_scan_state(hdev, dr.dev_opt);
1da177e4
LT		 1846 break;
1847
1da177e4 1848 case HCISETLINKPOL:
01178cd4 1849 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
4ebeee2d 1850 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1851 break;
1852
1853 case HCISETLINKMODE:
e4e8e37c
MH		 1854 hdev->link_mode = ((__u16) dr.dev_opt) &
1855 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1856 break;
1857
1858 case HCISETPTYPE:
1859 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1860 break;
1861
1862 case HCISETACLMTU:
e4e8e37c
MH		 1863 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1864 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1865 break;
1866
1867 case HCISETSCOMTU:
e4e8e37c
MH		 1868 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1869 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1870 break;
1871
1872 default:
1873 err = -EINVAL;
1874 break;
1875 }
e4e8e37c 1876
0736cfa8 1877done:
1da177e4
LT		 1878 hci_dev_put(hdev);
1879 return err;
1880}
1881
1882int hci_get_dev_list(void __user *arg)
1883{
8035ded4 1884 struct hci_dev *hdev;
1da177e4
LT		 1885 struct hci_dev_list_req *dl;
1886 struct hci_dev_req *dr;
1da177e4
LT		 1887 int n = 0, size, err;
1888 __u16 dev_num;
1889
1890 if (get_user(dev_num, (__u16 __user *) arg))
1891 return -EFAULT;
1892
1893 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1894 return -EINVAL;
1895
1896 size = sizeof(*dl) + dev_num * sizeof(*dr);
1897
70f23020
AE		 1898 dl = kzalloc(size, GFP_KERNEL);
1899 if (!dl)
1da177e4
LT		 1900 return -ENOMEM;
1901
1902 dr = dl->dev_req;
1903
f20d09d5 1904 read_lock(&hci_dev_list_lock);
8035ded4 1905 list_for_each_entry(hdev, &hci_dev_list, list) {
2e84d8db 1906 unsigned long flags = hdev->flags;
c542a06c 1907
2e84d8db
MH		 1908 /* When the auto-off is configured it means the transport
1909 * is running, but in that case still indicate that the
1910 * device is actually down.
1911 */
d7a5a11d 1912 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2e84d8db 1913 flags &= ~BIT(HCI_UP);
c542a06c 1914
1da177e4 1915 (dr + n)->dev_id = hdev->id;
2e84d8db 1916 (dr + n)->dev_opt = flags;
c542a06c 1917
1da177e4
LT		 1918 if (++n >= dev_num)
1919 break;
1920 }
f20d09d5 1921 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1922
1923 dl->dev_num = n;
1924 size = sizeof(*dl) + n * sizeof(*dr);
1925
1926 err = copy_to_user(arg, dl, size);
1927 kfree(dl);
1928
1929 return err ? -EFAULT : 0;
1930}
1931
1932int hci_get_dev_info(void __user *arg)
1933{
1934 struct hci_dev *hdev;
1935 struct hci_dev_info di;
2e84d8db 1936 unsigned long flags;
1da177e4
LT		 1937 int err = 0;
1938
1939 if (copy_from_user(&di, arg, sizeof(di)))
1940 return -EFAULT;
1941
70f23020
AE		 1942 hdev = hci_dev_get(di.dev_id);
1943 if (!hdev)
1da177e4
LT		 1944 return -ENODEV;
1945
2e84d8db
MH		 1946 /* When the auto-off is configured it means the transport
1947 * is running, but in that case still indicate that the
1948 * device is actually down.
1949 */
d7a5a11d 1950 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2e84d8db
MH		 1951 flags = hdev->flags & ~BIT(HCI_UP);
1952 else
1953 flags = hdev->flags;
c542a06c 1954
1da177e4
LT		 1955 strcpy(di.name, hdev->name);
1956 di.bdaddr = hdev->bdaddr;
60f2a3ed 1957 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2e84d8db 1958 di.flags = flags;
1da177e4 1959 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1960 if (lmp_bredr_capable(hdev)) {
1961 di.acl_mtu = hdev->acl_mtu;
1962 di.acl_pkts = hdev->acl_pkts;
1963 di.sco_mtu = hdev->sco_mtu;
1964 di.sco_pkts = hdev->sco_pkts;
1965 } else {
1966 di.acl_mtu = hdev->le_mtu;
1967 di.acl_pkts = hdev->le_pkts;
1968 di.sco_mtu = 0;
1969 di.sco_pkts = 0;
1970 }
1da177e4
LT		 1971 di.link_policy = hdev->link_policy;
1972 di.link_mode = hdev->link_mode;
1973
1974 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1975 memcpy(&di.features, &hdev->features, sizeof(di.features));
1976
1977 if (copy_to_user(arg, &di, sizeof(di)))
1978 err = -EFAULT;
1979
1980 hci_dev_put(hdev);
1981
1982 return err;
1983}
1984
1985/* ---- Interface to HCI drivers ---- */
1986
611b30f7
MH		 1987static int hci_rfkill_set_block(void *data, bool blocked)
1988{
1989 struct hci_dev *hdev = data;
1990
1991 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1992
d7a5a11d 1993 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
0736cfa8
MH		 1994 return -EBUSY;
1995
5e130367 1996 if (blocked) {
a1536da2 1997 hci_dev_set_flag(hdev, HCI_RFKILLED);
d7a5a11d
MH		 1998 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1999 !hci_dev_test_flag(hdev, HCI_CONFIG))
bf543036 2000 hci_dev_do_close(hdev);
5e130367 2001 } else {
a358dc11 2002 hci_dev_clear_flag(hdev, HCI_RFKILLED);
1025c04c 2003 }
611b30f7
MH		 2004
2005 return 0;
2006}
2007
2008static const struct rfkill_ops hci_rfkill_ops = {
2009 .set_block = hci_rfkill_set_block,
2010};
2011
ab81cbf9
JH		 2012static void hci_power_on(struct work_struct *work)
2013{
2014 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 2015 int err;
ab81cbf9
JH		 2016
2017 BT_DBG("%s", hdev->name);
2018
2ff13894
JH		 2019 if (test_bit(HCI_UP, &hdev->flags) &&
2020 hci_dev_test_flag(hdev, HCI_MGMT) &&
2021 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
d82142a8 2022 cancel_delayed_work(&hdev->power_off);
2ff13894
JH		 2023 hci_req_sync_lock(hdev);
2024 err = __hci_req_hci_power_on(hdev);
2025 hci_req_sync_unlock(hdev);
2026 mgmt_power_on(hdev, err);
2027 return;
2028 }
2029
cbed0ca1 2030 err = hci_dev_do_open(hdev);
96570ffc 2031 if (err < 0) {
3ad67582 2032 hci_dev_lock(hdev);
96570ffc 2033 mgmt_set_powered_failed(hdev, err);
3ad67582 2034 hci_dev_unlock(hdev);
ab81cbf9 2035 return;
96570ffc 2036 }
ab81cbf9 2037
a5c8f270
MH		 2038 /* During the HCI setup phase, a few error conditions are
2039 * ignored and they need to be checked now. If they are still
2040 * valid, it is important to turn the device back off.
2041 */
d7a5a11d
MH		 2042 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2043 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
ca8bee5d 2044 (hdev->dev_type == HCI_PRIMARY &&
a5c8f270
MH		 2045 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2046 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
a358dc11 2047 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
bf543036 2048 hci_dev_do_close(hdev);
d7a5a11d 2049 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
19202573
JH		 2050 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2051 HCI_AUTO_OFF_TIMEOUT);
bf543036 2052 }
ab81cbf9 2053
a69d8927 2054 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
4a964404
MH		 2055 /* For unconfigured devices, set the HCI_RAW flag
2056 * so that userspace can easily identify them.
4a964404 2057 */
d7a5a11d 2058 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4a964404 2059 set_bit(HCI_RAW, &hdev->flags);
0602a8ad
MH		 2060
2061 /* For fully configured devices, this will send
2062 * the Index Added event. For unconfigured devices,
2063 * it will send Unconfigued Index Added event.
2064 *
2065 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2066 * and no event will be send.
2067 */
2068 mgmt_index_added(hdev);
a69d8927 2069 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5ea234d3
MH		 2070 /* When the controller is now configured, then it
2071 * is important to clear the HCI_RAW flag.
2072 */
d7a5a11d 2073 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5ea234d3
MH		 2074 clear_bit(HCI_RAW, &hdev->flags);
2075
d603b76b
MH		 2076 /* Powering on the controller with HCI_CONFIG set only
2077 * happens with the transition from unconfigured to
2078 * configured. This will send the Index Added event.
2079 */
744cf19e 2080 mgmt_index_added(hdev);
fee746b0 2081 }
ab81cbf9
JH		 2082}
2083
2084static void hci_power_off(struct work_struct *work)
2085{
3243553f 2086 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 2087 power_off.work);
ab81cbf9
JH		 2088
2089 BT_DBG("%s", hdev->name);
2090
8ee56540 2091 hci_dev_do_close(hdev);
ab81cbf9
JH		 2092}
2093
c7741d16
MH		 2094static void hci_error_reset(struct work_struct *work)
2095{
2096 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2097
2098 BT_DBG("%s", hdev->name);
2099
2100 if (hdev->hw_error)
2101 hdev->hw_error(hdev, hdev->hw_error_code);
2102 else
2103 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2104 hdev->hw_error_code);
2105
2106 if (hci_dev_do_close(hdev))
2107 return;
2108
c7741d16
MH		 2109 hci_dev_do_open(hdev);
2110}
2111
35f7498a 2112void hci_uuids_clear(struct hci_dev *hdev)
2aeb9a1a 2113{
4821002c 2114 struct bt_uuid *uuid, *tmp;
2aeb9a1a 2115
4821002c
JH		 2116 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2117 list_del(&uuid->list);
2aeb9a1a
JH		 2118 kfree(uuid);
2119 }
2aeb9a1a
JH		 2120}
2121
35f7498a 2122void hci_link_keys_clear(struct hci_dev *hdev)
55ed8ca1 2123{
0378b597 2124 struct link_key *key;
55ed8ca1 2125
0378b597
JH		 2126 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2127 list_del_rcu(&key->list);
2128 kfree_rcu(key, rcu);
55ed8ca1 2129 }
55ed8ca1
JH		 2130}
2131
35f7498a 2132void hci_smp_ltks_clear(struct hci_dev *hdev)
b899efaf 2133{
970d0f1b 2134 struct smp_ltk *k;
b899efaf 2135
970d0f1b
JH		 2136 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2137 list_del_rcu(&k->list);
2138 kfree_rcu(k, rcu);
b899efaf 2139 }
b899efaf
VCG		 2140}
2141
970c4e46
JH		 2142void hci_smp_irks_clear(struct hci_dev *hdev)
2143{
adae20cb 2144 struct smp_irk *k;
970c4e46 2145
adae20cb
JH		 2146 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2147 list_del_rcu(&k->list);
2148 kfree_rcu(k, rcu);
970c4e46
JH		 2149 }
2150}
2151
55ed8ca1
JH		 2152struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2153{
8035ded4 2154 struct link_key *k;
55ed8ca1 2155
0378b597
JH		 2156 rcu_read_lock();
2157 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2158 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2159 rcu_read_unlock();
55ed8ca1 2160 return k;
0378b597
JH		 2161 }
2162 }
2163 rcu_read_unlock();
55ed8ca1
JH		 2164
2165 return NULL;
2166}
2167
745c0ce3 2168static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 2169 u8 key_type, u8 old_key_type)
d25e28ab
JH		 2170{
2171 /* Legacy key */
2172 if (key_type < 0x03)
745c0ce3 2173 return true;
d25e28ab
JH		 2174
2175 /* Debug keys are insecure so don't store them persistently */
2176 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 2177 return false;
d25e28ab
JH		 2178
2179 /* Changed combination key and there's no previous one */
2180 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 2181 return false;
d25e28ab
JH		 2182
2183 /* Security mode 3 case */
2184 if (!conn)
745c0ce3 2185 return true;
d25e28ab 2186
e3befab9
JH		 2187 /* BR/EDR key derived using SC from an LE link */
2188 if (conn->type == LE_LINK)
2189 return true;
2190
d25e28ab
JH		 2191 /* Neither local nor remote side had no-bonding as requirement */
2192 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 2193 return true;
d25e28ab
JH		 2194
2195 /* Local side had dedicated bonding as requirement */
2196 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 2197 return true;
d25e28ab
JH		 2198
2199 /* Remote side had dedicated bonding as requirement */
2200 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 2201 return true;
d25e28ab
JH		 2202
2203 /* If none of the above criteria match, then don't store the key
2204 * persistently */
745c0ce3 2205 return false;
d25e28ab
JH		 2206}
2207
e804d25d 2208static u8 ltk_role(u8 type)
98a0b845 2209{
e804d25d
JH		 2210 if (type == SMP_LTK)
2211 return HCI_ROLE_MASTER;
98a0b845 2212
e804d25d 2213 return HCI_ROLE_SLAVE;
98a0b845
JH		 2214}
2215
f3a73d97
JH		 2216struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2217 u8 addr_type, u8 role)
75d262c2 2218{
c9839a11 2219 struct smp_ltk *k;
75d262c2 2220
970d0f1b
JH		 2221 rcu_read_lock();
2222 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
5378bc56
JH		 2223 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2224 continue;
2225
923e2414 2226 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
970d0f1b 2227 rcu_read_unlock();
75d262c2 2228 return k;
970d0f1b
JH		 2229 }
2230 }
2231 rcu_read_unlock();
75d262c2
VCG		 2232
2233 return NULL;
2234}
75d262c2 2235
970c4e46
JH		 2236struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2237{
2238 struct smp_irk *irk;
2239
adae20cb
JH		 2240 rcu_read_lock();
2241 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2242 if (!bacmp(&irk->rpa, rpa)) {
2243 rcu_read_unlock();
970c4e46 2244 return irk;
adae20cb 2245 }
970c4e46
JH		 2246 }
2247
adae20cb 2248 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
defce9e8 2249 if (smp_irk_matches(hdev, irk->val, rpa)) {
970c4e46 2250 bacpy(&irk->rpa, rpa);
adae20cb 2251 rcu_read_unlock();
970c4e46
JH		 2252 return irk;
2253 }
2254 }
adae20cb 2255 rcu_read_unlock();
970c4e46
JH		 2256
2257 return NULL;
2258}
2259
2260struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2261 u8 addr_type)
2262{
2263 struct smp_irk *irk;
2264
6cfc9988
JH		 2265 /* Identity Address must be public or static random */
2266 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2267 return NULL;
2268
adae20cb
JH		 2269 rcu_read_lock();
2270 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
970c4e46 2271 if (addr_type == irk->addr_type &&
adae20cb
JH		 2272 bacmp(bdaddr, &irk->bdaddr) == 0) {
2273 rcu_read_unlock();
970c4e46 2274 return irk;
adae20cb 2275 }
970c4e46 2276 }
adae20cb 2277 rcu_read_unlock();
970c4e46
JH		 2278
2279 return NULL;
2280}
2281
567fa2aa 2282struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
7652ff6a
JH		 2283 bdaddr_t *bdaddr, u8 *val, u8 type,
2284 u8 pin_len, bool *persistent)
55ed8ca1
JH		 2285{
2286 struct link_key *key, *old_key;
745c0ce3 2287 u8 old_key_type;
55ed8ca1
JH		 2288
2289 old_key = hci_find_link_key(hdev, bdaddr);
2290 if (old_key) {
2291 old_key_type = old_key->type;
2292 key = old_key;
2293 } else {
12adcf3a 2294 old_key_type = conn ? conn->key_type : 0xff;
0a14ab41 2295 key = kzalloc(sizeof(*key), GFP_KERNEL);
55ed8ca1 2296 if (!key)
567fa2aa 2297 return NULL;
0378b597 2298 list_add_rcu(&key->list, &hdev->link_keys);
55ed8ca1
JH		 2299 }
2300
6ed93dc6 2301 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 2302
d25e28ab
JH		 2303 /* Some buggy controller combinations generate a changed
2304 * combination key for legacy pairing even when there's no
2305 * previous key */
2306 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 2307 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 2308 type = HCI_LK_COMBINATION;
655fe6ec
JH		 2309 if (conn)
2310 conn->key_type = type;
2311 }
d25e28ab 2312
55ed8ca1 2313 bacpy(&key->bdaddr, bdaddr);
9b3b4460 2314 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 2315 key->pin_len = pin_len;
2316
b6020ba0 2317 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 2318 key->type = old_key_type;
4748fed2
JH		 2319 else
2320 key->type = type;
2321
7652ff6a
JH		 2322 if (persistent)
2323 *persistent = hci_persistent_key(hdev, conn, type,
2324 old_key_type);
4df378a1 2325
567fa2aa 2326 return key;
55ed8ca1
JH		 2327}
2328
ca9142b8 2329struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
35d70271 2330 u8 addr_type, u8 type, u8 authenticated,
fe39c7b2 2331 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
75d262c2 2332{
c9839a11 2333 struct smp_ltk *key, *old_key;
e804d25d 2334 u8 role = ltk_role(type);
75d262c2 2335
f3a73d97 2336 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
c9839a11 2337 if (old_key)
75d262c2 2338 key = old_key;
c9839a11 2339 else {
0a14ab41 2340 key = kzalloc(sizeof(*key), GFP_KERNEL);
75d262c2 2341 if (!key)
ca9142b8 2342 return NULL;
970d0f1b 2343 list_add_rcu(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 2344 }
2345
75d262c2 2346 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 2347 key->bdaddr_type = addr_type;
2348 memcpy(key->val, tk, sizeof(key->val));
2349 key->authenticated = authenticated;
2350 key->ediv = ediv;
fe39c7b2 2351 key->rand = rand;
c9839a11
VCG		 2352 key->enc_size = enc_size;
2353 key->type = type;
75d262c2 2354
ca9142b8 2355 return key;
75d262c2
VCG		 2356}
2357
ca9142b8
JH		 2358struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2359 u8 addr_type, u8 val[16], bdaddr_t *rpa)
970c4e46
JH		 2360{
2361 struct smp_irk *irk;
2362
2363 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2364 if (!irk) {
2365 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2366 if (!irk)
ca9142b8 2367 return NULL;
970c4e46
JH		 2368
2369 bacpy(&irk->bdaddr, bdaddr);
2370 irk->addr_type = addr_type;
2371
adae20cb 2372 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
970c4e46
JH		 2373 }
2374
2375 memcpy(irk->val, val, 16);
2376 bacpy(&irk->rpa, rpa);
2377
ca9142b8 2378 return irk;
970c4e46
JH		 2379}
2380
55ed8ca1
JH		 2381int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2382{
2383 struct link_key *key;
2384
2385 key = hci_find_link_key(hdev, bdaddr);
2386 if (!key)
2387 return -ENOENT;
2388
6ed93dc6 2389 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1 2390
0378b597
JH		 2391 list_del_rcu(&key->list);
2392 kfree_rcu(key, rcu);
55ed8ca1
JH		 2393
2394 return 0;
2395}
2396
e0b2b27e 2397int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
b899efaf 2398{
970d0f1b 2399 struct smp_ltk *k;
c51ffa0b 2400 int removed = 0;
b899efaf 2401
970d0f1b 2402 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
e0b2b27e 2403 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
b899efaf
VCG		 2404 continue;
2405
6ed93dc6 2406 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf 2407
970d0f1b
JH		 2408 list_del_rcu(&k->list);
2409 kfree_rcu(k, rcu);
c51ffa0b 2410 removed++;
b899efaf
VCG		 2411 }
2412
c51ffa0b 2413 return removed ? 0 : -ENOENT;
b899efaf
VCG		 2414}
2415
a7ec7338
JH		 2416void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2417{
adae20cb 2418 struct smp_irk *k;
a7ec7338 2419
adae20cb 2420 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
a7ec7338
JH		 2421 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2422 continue;
2423
2424 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2425
adae20cb
JH		 2426 list_del_rcu(&k->list);
2427 kfree_rcu(k, rcu);
a7ec7338
JH		 2428 }
2429}
2430
55e76b38
JH		 2431bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2432{
2433 struct smp_ltk *k;
4ba9faf3 2434 struct smp_irk *irk;
55e76b38
JH		 2435 u8 addr_type;
2436
2437 if (type == BDADDR_BREDR) {
2438 if (hci_find_link_key(hdev, bdaddr))
2439 return true;
2440 return false;
2441 }
2442
2443 /* Convert to HCI addr type which struct smp_ltk uses */
2444 if (type == BDADDR_LE_PUBLIC)
2445 addr_type = ADDR_LE_DEV_PUBLIC;
2446 else
2447 addr_type = ADDR_LE_DEV_RANDOM;
2448
4ba9faf3
JH		 2449 irk = hci_get_irk(hdev, bdaddr, addr_type);
2450 if (irk) {
2451 bdaddr = &irk->bdaddr;
2452 addr_type = irk->addr_type;
2453 }
2454
55e76b38
JH		 2455 rcu_read_lock();
2456 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
87c8b28d
JH		 2457 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2458 rcu_read_unlock();
55e76b38 2459 return true;
87c8b28d 2460 }
55e76b38
JH		 2461 }
2462 rcu_read_unlock();
2463
2464 return false;
2465}
2466
6bd32326 2467/* HCI command timer function */
65cc2b49 2468static void hci_cmd_timeout(struct work_struct *work)
6bd32326 2469{
65cc2b49
MH		 2470 struct hci_dev *hdev = container_of(work, struct hci_dev,
2471 cmd_timer.work);
6bd32326 2472
bda4f23a
AE		 2473 if (hdev->sent_cmd) {
2474 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2475 u16 opcode = __le16_to_cpu(sent->opcode);
2476
2477 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2478 } else {
2479 BT_ERR("%s command tx timeout", hdev->name);
2480 }
2481
6bd32326 2482 atomic_set(&hdev->cmd_cnt, 1);
c347b765 2483 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 2484}
2485
2763eda6 2486struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
6928a924 2487 bdaddr_t *bdaddr, u8 bdaddr_type)
2763eda6
SJ		 2488{
2489 struct oob_data *data;
2490
6928a924
JH		 2491 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2492 if (bacmp(bdaddr, &data->bdaddr) != 0)
2493 continue;
2494 if (data->bdaddr_type != bdaddr_type)
2495 continue;
2496 return data;
2497 }
2763eda6
SJ		 2498
2499 return NULL;
2500}
2501
6928a924
JH		 2502int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2503 u8 bdaddr_type)
2763eda6
SJ		 2504{
2505 struct oob_data *data;
2506
6928a924 2507 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2763eda6
SJ		 2508 if (!data)
2509 return -ENOENT;
2510
6928a924 2511 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2763eda6
SJ		 2512
2513 list_del(&data->list);
2514 kfree(data);
2515
2516 return 0;
2517}
2518
35f7498a 2519void hci_remote_oob_data_clear(struct hci_dev *hdev)
2763eda6
SJ		 2520{
2521 struct oob_data *data, *n;
2522
2523 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2524 list_del(&data->list);
2525 kfree(data);
2526 }
2763eda6
SJ		 2527}
2528
0798872e 2529int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
6928a924 2530 u8 bdaddr_type, u8 *hash192, u8 *rand192,
81328d5c 2531 u8 *hash256, u8 *rand256)
2763eda6
SJ		 2532{
2533 struct oob_data *data;
2534
6928a924 2535 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2763eda6 2536 if (!data) {
0a14ab41 2537 data = kmalloc(sizeof(*data), GFP_KERNEL);
2763eda6
SJ		 2538 if (!data)
2539 return -ENOMEM;
2540
2541 bacpy(&data->bdaddr, bdaddr);
6928a924 2542 data->bdaddr_type = bdaddr_type;
2763eda6
SJ		 2543 list_add(&data->list, &hdev->remote_oob_data);
2544 }
2545
81328d5c
JH		 2546 if (hash192 && rand192) {
2547 memcpy(data->hash192, hash192, sizeof(data->hash192));
2548 memcpy(data->rand192, rand192, sizeof(data->rand192));
f7697b16
MH		 2549 if (hash256 && rand256)
2550 data->present = 0x03;
81328d5c
JH		 2551 } else {
2552 memset(data->hash192, 0, sizeof(data->hash192));
2553 memset(data->rand192, 0, sizeof(data->rand192));
f7697b16
MH		 2554 if (hash256 && rand256)
2555 data->present = 0x02;
2556 else
2557 data->present = 0x00;
0798872e
MH		 2558 }
2559
81328d5c
JH		 2560 if (hash256 && rand256) {
2561 memcpy(data->hash256, hash256, sizeof(data->hash256));
2562 memcpy(data->rand256, rand256, sizeof(data->rand256));
2563 } else {
2564 memset(data->hash256, 0, sizeof(data->hash256));
2565 memset(data->rand256, 0, sizeof(data->rand256));
f7697b16
MH		 2566 if (hash192 && rand192)
2567 data->present = 0x01;
81328d5c 2568 }
0798872e 2569
6ed93dc6 2570 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2571
2572 return 0;
2573}
2574
d2609b34
FG		 2575/* This function requires the caller holds hdev->lock */
2576struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2577{
2578 struct adv_info *adv_instance;
2579
2580 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2581 if (adv_instance->instance == instance)
2582 return adv_instance;
2583 }
2584
2585 return NULL;
2586}
2587
2588/* This function requires the caller holds hdev->lock */
74b93e9f
PK		 2589struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2590{
d2609b34
FG		 2591 struct adv_info *cur_instance;
2592
2593 cur_instance = hci_find_adv_instance(hdev, instance);
2594 if (!cur_instance)
2595 return NULL;
2596
2597 if (cur_instance == list_last_entry(&hdev->adv_instances,
2598 struct adv_info, list))
2599 return list_first_entry(&hdev->adv_instances,
2600 struct adv_info, list);
2601 else
2602 return list_next_entry(cur_instance, list);
2603}
2604
2605/* This function requires the caller holds hdev->lock */
2606int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2607{
2608 struct adv_info *adv_instance;
2609
2610 adv_instance = hci_find_adv_instance(hdev, instance);
2611 if (!adv_instance)
2612 return -ENOENT;
2613
2614 BT_DBG("%s removing %dMR", hdev->name, instance);
2615
cab054ab
JH		 2616 if (hdev->cur_adv_instance == instance) {
2617 if (hdev->adv_instance_timeout) {
2618 cancel_delayed_work(&hdev->adv_instance_expire);
2619 hdev->adv_instance_timeout = 0;
2620 }
2621 hdev->cur_adv_instance = 0x00;
5d900e46
FG		 2622 }
2623
d2609b34
FG		 2624 list_del(&adv_instance->list);
2625 kfree(adv_instance);
2626
2627 hdev->adv_instance_cnt--;
2628
2629 return 0;
2630}
2631
2632/* This function requires the caller holds hdev->lock */
2633void hci_adv_instances_clear(struct hci_dev *hdev)
2634{
2635 struct adv_info *adv_instance, *n;
2636
5d900e46
FG		 2637 if (hdev->adv_instance_timeout) {
2638 cancel_delayed_work(&hdev->adv_instance_expire);
2639 hdev->adv_instance_timeout = 0;
2640 }
2641
d2609b34
FG		 2642 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2643 list_del(&adv_instance->list);
2644 kfree(adv_instance);
2645 }
2646
2647 hdev->adv_instance_cnt = 0;
cab054ab 2648 hdev->cur_adv_instance = 0x00;
d2609b34
FG		 2649}
2650
2651/* This function requires the caller holds hdev->lock */
2652int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2653 u16 adv_data_len, u8 *adv_data,
2654 u16 scan_rsp_len, u8 *scan_rsp_data,
2655 u16 timeout, u16 duration)
2656{
2657 struct adv_info *adv_instance;
2658
2659 adv_instance = hci_find_adv_instance(hdev, instance);
2660 if (adv_instance) {
2661 memset(adv_instance->adv_data, 0,
2662 sizeof(adv_instance->adv_data));
2663 memset(adv_instance->scan_rsp_data, 0,
2664 sizeof(adv_instance->scan_rsp_data));
2665 } else {
2666 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2667 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2668 return -EOVERFLOW;
2669
39ecfad6 2670 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
d2609b34
FG		 2671 if (!adv_instance)
2672 return -ENOMEM;
2673
fffd38bc 2674 adv_instance->pending = true;
d2609b34
FG		 2675 adv_instance->instance = instance;
2676 list_add(&adv_instance->list, &hdev->adv_instances);
2677 hdev->adv_instance_cnt++;
2678 }
2679
2680 adv_instance->flags = flags;
2681 adv_instance->adv_data_len = adv_data_len;
2682 adv_instance->scan_rsp_len = scan_rsp_len;
2683
2684 if (adv_data_len)
2685 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2686
2687 if (scan_rsp_len)
2688 memcpy(adv_instance->scan_rsp_data,
2689 scan_rsp_data, scan_rsp_len);
2690
2691 adv_instance->timeout = timeout;
5d900e46 2692 adv_instance->remaining_time = timeout;
d2609b34
FG		 2693
2694 if (duration == 0)
2695 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2696 else
2697 adv_instance->duration = duration;
2698
2699 BT_DBG("%s for %dMR", hdev->name, instance);
2700
2701 return 0;
2702}
2703
dcc36c16 2704struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
b9ee0a78 2705 bdaddr_t *bdaddr, u8 type)
b2a66aad 2706{
8035ded4 2707 struct bdaddr_list *b;
b2a66aad 2708
dcc36c16 2709 list_for_each_entry(b, bdaddr_list, list) {
b9ee0a78 2710 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
b2a66aad 2711 return b;
b9ee0a78 2712 }
b2a66aad
AJ		 2713
2714 return NULL;
2715}
2716
dcc36c16 2717void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
b2a66aad 2718{
7eb7404f 2719 struct bdaddr_list *b, *n;
b2a66aad 2720
7eb7404f
GT		 2721 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2722 list_del(&b->list);
b2a66aad
AJ		 2723 kfree(b);
2724 }
b2a66aad
AJ		 2725}
2726
dcc36c16 2727int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2728{
2729 struct bdaddr_list *entry;
b2a66aad 2730
b9ee0a78 2731 if (!bacmp(bdaddr, BDADDR_ANY))
b2a66aad
AJ		 2732 return -EBADF;
2733
dcc36c16 2734 if (hci_bdaddr_list_lookup(list, bdaddr, type))
5e762444 2735 return -EEXIST;
b2a66aad 2736
27f70f3e 2737 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
5e762444
AJ		 2738 if (!entry)
2739 return -ENOMEM;
b2a66aad
AJ		 2740
2741 bacpy(&entry->bdaddr, bdaddr);
b9ee0a78 2742 entry->bdaddr_type = type;
b2a66aad 2743
dcc36c16 2744 list_add(&entry->list, list);
b2a66aad 2745
2a8357f2 2746 return 0;
b2a66aad
AJ		 2747}
2748
dcc36c16 2749int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2750{
2751 struct bdaddr_list *entry;
b2a66aad 2752
35f7498a 2753 if (!bacmp(bdaddr, BDADDR_ANY)) {
dcc36c16 2754 hci_bdaddr_list_clear(list);
35f7498a
JH		 2755 return 0;
2756 }
b2a66aad 2757
dcc36c16 2758 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
d2ab0ac1
MH		 2759 if (!entry)
2760 return -ENOENT;
2761
2762 list_del(&entry->list);
2763 kfree(entry);
2764
2765 return 0;
2766}
2767
15819a70
AG		 2768/* This function requires the caller holds hdev->lock */
2769struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2770 bdaddr_t *addr, u8 addr_type)
2771{
2772 struct hci_conn_params *params;
2773
2774 list_for_each_entry(params, &hdev->le_conn_params, list) {
2775 if (bacmp(&params->addr, addr) == 0 &&
2776 params->addr_type == addr_type) {
2777 return params;
2778 }
2779 }
2780
2781 return NULL;
2782}
2783
4b10966f 2784/* This function requires the caller holds hdev->lock */
501f8827
JH		 2785struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2786 bdaddr_t *addr, u8 addr_type)
a9b0a04c 2787{
912b42ef 2788 struct hci_conn_params *param;
a9b0a04c 2789
501f8827 2790 list_for_each_entry(param, list, action) {
912b42ef
JH		 2791 if (bacmp(&param->addr, addr) == 0 &&
2792 param->addr_type == addr_type)
2793 return param;
4b10966f
MH		 2794 }
2795
2796 return NULL;
a9b0a04c
AG		 2797}
2798
15819a70 2799/* This function requires the caller holds hdev->lock */
51d167c0
MH		 2800struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2801 bdaddr_t *addr, u8 addr_type)
15819a70
AG		 2802{
2803 struct hci_conn_params *params;
2804
2805 params = hci_conn_params_lookup(hdev, addr, addr_type);
cef952ce 2806 if (params)
51d167c0 2807 return params;
15819a70
AG		 2808
2809 params = kzalloc(sizeof(*params), GFP_KERNEL);
2810 if (!params) {
2811 BT_ERR("Out of memory");
51d167c0 2812 return NULL;
15819a70
AG		 2813 }
2814
2815 bacpy(&params->addr, addr);
2816 params->addr_type = addr_type;
cef952ce
AG		 2817
2818 list_add(&params->list, &hdev->le_conn_params);
93450c75 2819 INIT_LIST_HEAD(&params->action);
cef952ce 2820
bf5b3c8b
MH		 2821 params->conn_min_interval = hdev->le_conn_min_interval;
2822 params->conn_max_interval = hdev->le_conn_max_interval;
2823 params->conn_latency = hdev->le_conn_latency;
2824 params->supervision_timeout = hdev->le_supv_timeout;
2825 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2826
2827 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2828
51d167c0 2829 return params;
bf5b3c8b
MH		 2830}
2831
f6c63249 2832static void hci_conn_params_free(struct hci_conn_params *params)
15819a70 2833{
f8aaf9b6 2834 if (params->conn) {
f161dd41 2835 hci_conn_drop(params->conn);
f8aaf9b6
JH		 2836 hci_conn_put(params->conn);
2837 }
f161dd41 2838
95305baa 2839 list_del(&params->action);
15819a70
AG		 2840 list_del(&params->list);
2841 kfree(params);
f6c63249
JH		 2842}
2843
2844/* This function requires the caller holds hdev->lock */
2845void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2846{
2847 struct hci_conn_params *params;
2848
2849 params = hci_conn_params_lookup(hdev, addr, addr_type);
2850 if (!params)
2851 return;
2852
2853 hci_conn_params_free(params);
15819a70 2854
95305baa
JH		 2855 hci_update_background_scan(hdev);
2856
15819a70
AG		 2857 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2858}
2859
2860/* This function requires the caller holds hdev->lock */
55af49a8 2861void hci_conn_params_clear_disabled(struct hci_dev *hdev)
15819a70
AG		 2862{
2863 struct hci_conn_params *params, *tmp;
2864
2865 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
55af49a8
JH		 2866 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2867 continue;
f75113a2
JP		 2868
2869 /* If trying to estabilish one time connection to disabled
2870 * device, leave the params, but mark them as just once.
2871 */
2872 if (params->explicit_connect) {
2873 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2874 continue;
2875 }
2876
15819a70
AG		 2877 list_del(&params->list);
2878 kfree(params);
2879 }
2880
55af49a8 2881 BT_DBG("All LE disabled connection parameters were removed");
77a77a30
AG		 2882}
2883
2884/* This function requires the caller holds hdev->lock */
030e7f81 2885static void hci_conn_params_clear_all(struct hci_dev *hdev)
77a77a30 2886{
15819a70 2887 struct hci_conn_params *params, *tmp;
77a77a30 2888
f6c63249
JH		 2889 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2890 hci_conn_params_free(params);
77a77a30 2891
15819a70 2892 BT_DBG("All LE connection parameters were removed");
77a77a30
AG		 2893}
2894
a1f4c318
JH		 2895/* Copy the Identity Address of the controller.
2896 *
2897 * If the controller has a public BD_ADDR, then by default use that one.
2898 * If this is a LE only controller without a public address, default to
2899 * the static random address.
2900 *
2901 * For debugging purposes it is possible to force controllers with a
2902 * public address to use the static random address instead.
50b5b952
MH		 2903 *
2904 * In case BR/EDR has been disabled on a dual-mode controller and
2905 * userspace has configured a static address, then that address
2906 * becomes the identity address instead of the public BR/EDR address.
a1f4c318
JH		 2907 */
2908void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2909 u8 *bdaddr_type)
2910{
b7cb93e5 2911 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
50b5b952 2912 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
d7a5a11d 2913 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
50b5b952 2914 bacmp(&hdev->static_addr, BDADDR_ANY))) {
a1f4c318
JH		 2915 bacpy(bdaddr, &hdev->static_addr);
2916 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2917 } else {
2918 bacpy(bdaddr, &hdev->bdaddr);
2919 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2920 }
2921}
2922
9be0dab7
DH		 2923/* Alloc HCI device */
2924struct hci_dev *hci_alloc_dev(void)
2925{
2926 struct hci_dev *hdev;
2927
27f70f3e 2928 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
9be0dab7
DH		 2929 if (!hdev)
2930 return NULL;
2931
b1b813d4
DH		 2932 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2933 hdev->esco_type = (ESCO_HV1);
2934 hdev->link_mode = (HCI_LM_ACCEPT);
b4cb9fb2
MH		 2935 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2936 hdev->io_capability = 0x03; /* No Input No Output */
96c2103a 2937 hdev->manufacturer = 0xffff; /* Default to internal use */
bbaf444a
JH		 2938 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2939 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
d2609b34
FG		 2940 hdev->adv_instance_cnt = 0;
2941 hdev->cur_adv_instance = 0x00;
5d900e46 2942 hdev->adv_instance_timeout = 0;
b1b813d4 2943
b1b813d4
DH		 2944 hdev->sniff_max_interval = 800;
2945 hdev->sniff_min_interval = 80;
2946
3f959d46 2947 hdev->le_adv_channel_map = 0x07;
628531c9
GL		 2948 hdev->le_adv_min_interval = 0x0800;
2949 hdev->le_adv_max_interval = 0x0800;
bef64738
MH		 2950 hdev->le_scan_interval = 0x0060;
2951 hdev->le_scan_window = 0x0030;
4e70c7e7
MH		 2952 hdev->le_conn_min_interval = 0x0028;
2953 hdev->le_conn_max_interval = 0x0038;
04fb7d90
MH		 2954 hdev->le_conn_latency = 0x0000;
2955 hdev->le_supv_timeout = 0x002a;
a8e1bfaa
MH		 2956 hdev->le_def_tx_len = 0x001b;
2957 hdev->le_def_tx_time = 0x0148;
2958 hdev->le_max_tx_len = 0x001b;
2959 hdev->le_max_tx_time = 0x0148;
2960 hdev->le_max_rx_len = 0x001b;
2961 hdev->le_max_rx_time = 0x0148;
bef64738 2962
d6bfd59c 2963 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
b9a7a61e 2964 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
31ad1691
AK		 2965 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2966 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
d6bfd59c 2967
b1b813d4
DH		 2968 mutex_init(&hdev->lock);
2969 mutex_init(&hdev->req_lock);
2970
2971 INIT_LIST_HEAD(&hdev->mgmt_pending);
2972 INIT_LIST_HEAD(&hdev->blacklist);
6659358e 2973 INIT_LIST_HEAD(&hdev->whitelist);
b1b813d4
DH		 2974 INIT_LIST_HEAD(&hdev->uuids);
2975 INIT_LIST_HEAD(&hdev->link_keys);
2976 INIT_LIST_HEAD(&hdev->long_term_keys);
970c4e46 2977 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
b1b813d4 2978 INIT_LIST_HEAD(&hdev->remote_oob_data);
d2ab0ac1 2979 INIT_LIST_HEAD(&hdev->le_white_list);
15819a70 2980 INIT_LIST_HEAD(&hdev->le_conn_params);
77a77a30 2981 INIT_LIST_HEAD(&hdev->pend_le_conns);
66f8455a 2982 INIT_LIST_HEAD(&hdev->pend_le_reports);
6b536b5e 2983 INIT_LIST_HEAD(&hdev->conn_hash.list);
d2609b34 2984 INIT_LIST_HEAD(&hdev->adv_instances);
b1b813d4
DH		 2985
2986 INIT_WORK(&hdev->rx_work, hci_rx_work);
2987 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2988 INIT_WORK(&hdev->tx_work, hci_tx_work);
2989 INIT_WORK(&hdev->power_on, hci_power_on);
c7741d16 2990 INIT_WORK(&hdev->error_reset, hci_error_reset);
b1b813d4 2991
b1b813d4 2992 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
b1b813d4 2993
b1b813d4
DH		 2994 skb_queue_head_init(&hdev->rx_q);
2995 skb_queue_head_init(&hdev->cmd_q);
2996 skb_queue_head_init(&hdev->raw_q);
2997
2998 init_waitqueue_head(&hdev->req_wait_q);
2999
65cc2b49 3000 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
b1b813d4 3001
5fc16cc4
JH		 3002 hci_request_setup(hdev);
3003
b1b813d4
DH		 3004 hci_init_sysfs(hdev);
3005 discovery_init(hdev);
9be0dab7
DH		 3006
3007 return hdev;
3008}
3009EXPORT_SYMBOL(hci_alloc_dev);
3010
3011/* Free HCI device */
3012void hci_free_dev(struct hci_dev *hdev)
3013{
9be0dab7
DH		 3014 /* will free via device release */
3015 put_device(&hdev->dev);
3016}
3017EXPORT_SYMBOL(hci_free_dev);
3018
1da177e4
LT		 3019/* Register HCI device */
3020int hci_register_dev(struct hci_dev *hdev)
3021{
b1b813d4 3022 int id, error;
1da177e4 3023
74292d5a 3024 if (!hdev->open || !hdev->close || !hdev->send)
1da177e4
LT		 3025 return -EINVAL;
3026
08add513
MM		 3027 /* Do not allow HCI_AMP devices to register at index 0,
3028 * so the index can be used as the AMP controller ID.
3029 */
3df92b31 3030 switch (hdev->dev_type) {
ca8bee5d 3031 case HCI_PRIMARY:
3df92b31
SL		 3032 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3033 break;
3034 case HCI_AMP:
3035 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3036 break;
3037 default:
3038 return -EINVAL;
1da177e4 3039 }
8e87d142 3040
3df92b31
SL		 3041 if (id < 0)
3042 return id;
3043
1da177e4
LT		 3044 sprintf(hdev->name, "hci%d", id);
3045 hdev->id = id;
2d8b3a11
AE		 3046
3047 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3048
d8537548
KC		 3049 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3050 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 3051 if (!hdev->workqueue) {
3052 error = -ENOMEM;
3053 goto err;
3054 }
f48fd9c8 3055
d8537548
KC		 3056 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3057 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 3058 if (!hdev->req_workqueue) {
3059 destroy_workqueue(hdev->workqueue);
3060 error = -ENOMEM;
3061 goto err;
3062 }
3063
0153e2ec
MH		 3064 if (!IS_ERR_OR_NULL(bt_debugfs))
3065 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3066
bdc3e0f1
MH		 3067 dev_set_name(&hdev->dev, "%s", hdev->name);
3068
3069 error = device_add(&hdev->dev);
33ca954d 3070 if (error < 0)
54506918 3071 goto err_wqueue;
1da177e4 3072
6d5d2ee6
HK		 3073 hci_leds_init(hdev);
3074
611b30f7 3075 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 3076 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3077 hdev);
611b30f7
MH		 3078 if (hdev->rfkill) {
3079 if (rfkill_register(hdev->rfkill) < 0) {
3080 rfkill_destroy(hdev->rfkill);
3081 hdev->rfkill = NULL;
3082 }
3083 }
3084
5e130367 3085 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
a1536da2 3086 hci_dev_set_flag(hdev, HCI_RFKILLED);
5e130367 3087
a1536da2
MH		 3088 hci_dev_set_flag(hdev, HCI_SETUP);
3089 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
ce2be9ac 3090
ca8bee5d 3091 if (hdev->dev_type == HCI_PRIMARY) {
56f87901
JH		 3092 /* Assume BR/EDR support until proven otherwise (such as
3093 * through reading supported features during init.
3094 */
a1536da2 3095 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
56f87901 3096 }
ce2be9ac 3097
fcee3377
GP		 3098 write_lock(&hci_dev_list_lock);
3099 list_add(&hdev->list, &hci_dev_list);
3100 write_unlock(&hci_dev_list_lock);
3101
4a964404
MH		 3102 /* Devices that are marked for raw-only usage are unconfigured
3103 * and should not be included in normal operation.
fee746b0
MH		 3104 */
3105 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
a1536da2 3106 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
fee746b0 3107
05fcd4c4 3108 hci_sock_dev_event(hdev, HCI_DEV_REG);
dc946bd8 3109 hci_dev_hold(hdev);
1da177e4 3110
19202573 3111 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 3112
1da177e4 3113 return id;
f48fd9c8 3114
33ca954d
DH		 3115err_wqueue:
3116 destroy_workqueue(hdev->workqueue);
6ead1bbc 3117 destroy_workqueue(hdev->req_workqueue);
33ca954d 3118err:
3df92b31 3119 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 3120
33ca954d 3121 return error;
1da177e4
LT		 3122}
3123EXPORT_SYMBOL(hci_register_dev);
3124
3125/* Unregister HCI device */
59735631 3126void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 3127{
2d7cc19e 3128 int id;
ef222013 3129
c13854ce 3130 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 3131
a1536da2 3132 hci_dev_set_flag(hdev, HCI_UNREGISTER);
94324962 3133
3df92b31
SL		 3134 id = hdev->id;
3135
f20d09d5 3136 write_lock(&hci_dev_list_lock);
1da177e4 3137 list_del(&hdev->list);
f20d09d5 3138 write_unlock(&hci_dev_list_lock);
1da177e4 3139
b9b5ef18
GP		 3140 cancel_work_sync(&hdev->power_on);
3141
bf389cab
JS		 3142 hci_dev_do_close(hdev);
3143
ab81cbf9 3144 if (!test_bit(HCI_INIT, &hdev->flags) &&
d7a5a11d
MH		 3145 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3146 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
09fd0de5 3147 hci_dev_lock(hdev);
744cf19e 3148 mgmt_index_removed(hdev);
09fd0de5 3149 hci_dev_unlock(hdev);
56e5cb86 3150 }
ab81cbf9 3151
2e58ef3e
JH		 3152 /* mgmt_index_removed should take care of emptying the
3153 * pending list */
3154 BUG_ON(!list_empty(&hdev->mgmt_pending));
3155
05fcd4c4 3156 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
1da177e4 3157
611b30f7
MH		 3158 if (hdev->rfkill) {
3159 rfkill_unregister(hdev->rfkill);
3160 rfkill_destroy(hdev->rfkill);
3161 }
3162
bdc3e0f1 3163 device_del(&hdev->dev);
147e2d59 3164
0153e2ec 3165 debugfs_remove_recursive(hdev->debugfs);
5177a838
MH		 3166 kfree_const(hdev->hw_info);
3167 kfree_const(hdev->fw_info);
0153e2ec 3168
f48fd9c8 3169 destroy_workqueue(hdev->workqueue);
6ead1bbc 3170 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 3171
09fd0de5 3172 hci_dev_lock(hdev);
dcc36c16 3173 hci_bdaddr_list_clear(&hdev->blacklist);
6659358e 3174 hci_bdaddr_list_clear(&hdev->whitelist);
2aeb9a1a 3175 hci_uuids_clear(hdev);
55ed8ca1 3176 hci_link_keys_clear(hdev);
b899efaf 3177 hci_smp_ltks_clear(hdev);
970c4e46 3178 hci_smp_irks_clear(hdev);
2763eda6 3179 hci_remote_oob_data_clear(hdev);
d2609b34 3180 hci_adv_instances_clear(hdev);
dcc36c16 3181 hci_bdaddr_list_clear(&hdev->le_white_list);
373110c5 3182 hci_conn_params_clear_all(hdev);
22078800 3183 hci_discovery_filter_clear(hdev);
09fd0de5 3184 hci_dev_unlock(hdev);
e2e0cacb 3185
dc946bd8 3186 hci_dev_put(hdev);
3df92b31
SL		 3187
3188 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 3189}
3190EXPORT_SYMBOL(hci_unregister_dev);
3191
3192/* Suspend HCI device */
3193int hci_suspend_dev(struct hci_dev *hdev)
3194{
05fcd4c4 3195 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
1da177e4
LT		 3196 return 0;
3197}
3198EXPORT_SYMBOL(hci_suspend_dev);
3199
3200/* Resume HCI device */
3201int hci_resume_dev(struct hci_dev *hdev)
3202{
05fcd4c4 3203 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
1da177e4
LT		 3204 return 0;
3205}
3206EXPORT_SYMBOL(hci_resume_dev);
3207
75e0569f
MH		 3208/* Reset HCI device */
3209int hci_reset_dev(struct hci_dev *hdev)
3210{
3211 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3212 struct sk_buff *skb;
3213
3214 skb = bt_skb_alloc(3, GFP_ATOMIC);
3215 if (!skb)
3216 return -ENOMEM;
3217
d79f34e3 3218 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
75e0569f
MH		 3219 memcpy(skb_put(skb, 3), hw_err, 3);
3220
3221 /* Send Hardware Error to upper stack */
3222 return hci_recv_frame(hdev, skb);
3223}
3224EXPORT_SYMBOL(hci_reset_dev);
3225
76bca880 3226/* Receive frame from HCI drivers */
e1a26170 3227int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 3228{
76bca880 3229 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 3230 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 3231 kfree_skb(skb);
3232 return -ENXIO;
3233 }
3234
d79f34e3
MH		 3235 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3236 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3237 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
fe806dce
MH		 3238 kfree_skb(skb);
3239 return -EINVAL;
3240 }
3241
d82603c6 3242 /* Incoming skb */
76bca880
MH		 3243 bt_cb(skb)->incoming = 1;
3244
3245 /* Time stamp */
3246 __net_timestamp(skb);
3247
76bca880 3248 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 3249 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 3250
76bca880
MH		 3251 return 0;
3252}
3253EXPORT_SYMBOL(hci_recv_frame);
3254
e875ff84
MH		 3255/* Receive diagnostic message from HCI drivers */
3256int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3257{
581d6fd6 3258 /* Mark as diagnostic packet */
d79f34e3 3259 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
581d6fd6 3260
e875ff84
MH		 3261 /* Time stamp */
3262 __net_timestamp(skb);
3263
581d6fd6
MH		 3264 skb_queue_tail(&hdev->rx_q, skb);
3265 queue_work(hdev->workqueue, &hdev->rx_work);
e875ff84 3266
e875ff84
MH		 3267 return 0;
3268}
3269EXPORT_SYMBOL(hci_recv_diag);
3270
5177a838
MH		 3271void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3272{
3273 va_list vargs;
3274
3275 va_start(vargs, fmt);
3276 kfree_const(hdev->hw_info);
3277 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3278 va_end(vargs);
3279}
3280EXPORT_SYMBOL(hci_set_hw_info);
3281
3282void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3283{
3284 va_list vargs;
3285
3286 va_start(vargs, fmt);
3287 kfree_const(hdev->fw_info);
3288 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3289 va_end(vargs);
3290}
3291EXPORT_SYMBOL(hci_set_fw_info);
3292
1da177e4
LT		 3293/* ---- Interface to upper protocols ---- */
3294
1da177e4
LT		 3295int hci_register_cb(struct hci_cb *cb)
3296{
3297 BT_DBG("%p name %s", cb, cb->name);
3298
fba7ecf0 3299 mutex_lock(&hci_cb_list_lock);
00629e0f 3300 list_add_tail(&cb->list, &hci_cb_list);
fba7ecf0 3301 mutex_unlock(&hci_cb_list_lock);
1da177e4
LT		 3302
3303 return 0;
3304}
3305EXPORT_SYMBOL(hci_register_cb);
3306
3307int hci_unregister_cb(struct hci_cb *cb)
3308{
3309 BT_DBG("%p name %s", cb, cb->name);
3310
fba7ecf0 3311 mutex_lock(&hci_cb_list_lock);
1da177e4 3312 list_del(&cb->list);
fba7ecf0 3313 mutex_unlock(&hci_cb_list_lock);
1da177e4
LT		 3314
3315 return 0;
3316}
3317EXPORT_SYMBOL(hci_unregister_cb);
3318
51086991 3319static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 3320{
cdc52faa
MH		 3321 int err;
3322
d79f34e3
MH		 3323 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3324 skb->len);
1da177e4 3325
cd82e61c
MH		 3326 /* Time stamp */
3327 __net_timestamp(skb);
1da177e4 3328
cd82e61c
MH		 3329 /* Send copy to monitor */
3330 hci_send_to_monitor(hdev, skb);
3331
3332 if (atomic_read(&hdev->promisc)) {
3333 /* Send copy to the sockets */
470fe1b5 3334 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3335 }
3336
3337 /* Get rid of skb owner, prior to sending to the driver. */
3338 skb_orphan(skb);
3339
73d0d3c8
MH		 3340 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3341 kfree_skb(skb);
3342 return;
3343 }
3344
cdc52faa
MH		 3345 err = hdev->send(hdev, skb);
3346 if (err < 0) {
3347 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3348 kfree_skb(skb);
3349 }
1da177e4
LT		 3350}
3351
1ca3a9d0 3352/* Send HCI command */
07dc93dd
JH		 3353int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3354 const void *param)
1ca3a9d0
JH		 3355{
3356 struct sk_buff *skb;
3357
3358 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3359
3360 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3361 if (!skb) {
3362 BT_ERR("%s no memory for command", hdev->name);
3363 return -ENOMEM;
3364 }
3365
49c922bb 3366 /* Stand-alone HCI commands must be flagged as
11714b3d
JH		 3367 * single-command requests.
3368 */
44d27137 3369 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
11714b3d 3370
1da177e4 3371 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 3372 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3373
3374 return 0;
3375}
1da177e4
LT		 3376
3377/* Get data from the previously sent command */
a9de9248 3378void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 3379{
3380 struct hci_command_hdr *hdr;
3381
3382 if (!hdev->sent_cmd)
3383 return NULL;
3384
3385 hdr = (void *) hdev->sent_cmd->data;
3386
a9de9248 3387 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 3388 return NULL;
3389
f0e09510 3390 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 3391
3392 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3393}
3394
fbef168f
LP		 3395/* Send HCI command and wait for command commplete event */
3396struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3397 const void *param, u32 timeout)
3398{
3399 struct sk_buff *skb;
3400
3401 if (!test_bit(HCI_UP, &hdev->flags))
3402 return ERR_PTR(-ENETDOWN);
3403
3404 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3405
b504430c 3406 hci_req_sync_lock(hdev);
fbef168f 3407 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
b504430c 3408 hci_req_sync_unlock(hdev);
fbef168f
LP		 3409
3410 return skb;
3411}
3412EXPORT_SYMBOL(hci_cmd_sync);
3413
1da177e4
LT		 3414/* Send ACL data */
3415static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3416{
3417 struct hci_acl_hdr *hdr;
3418 int len = skb->len;
3419
badff6d0
ACM		 3420 skb_push(skb, HCI_ACL_HDR_SIZE);
3421 skb_reset_transport_header(skb);
9c70220b 3422 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 3423 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3424 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 3425}
3426
ee22be7e 3427static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 3428 struct sk_buff *skb, __u16 flags)
1da177e4 3429{
ee22be7e 3430 struct hci_conn *conn = chan->conn;
1da177e4
LT		 3431 struct hci_dev *hdev = conn->hdev;
3432 struct sk_buff *list;
3433
087bfd99
GP		 3434 skb->len = skb_headlen(skb);
3435 skb->data_len = 0;
3436
d79f34e3 3437 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
204a6e54
AE		 3438
3439 switch (hdev->dev_type) {
ca8bee5d 3440 case HCI_PRIMARY:
204a6e54
AE		 3441 hci_add_acl_hdr(skb, conn->handle, flags);
3442 break;
3443 case HCI_AMP:
3444 hci_add_acl_hdr(skb, chan->handle, flags);
3445 break;
3446 default:
3447 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3448 return;
3449 }
087bfd99 3450
70f23020
AE		 3451 list = skb_shinfo(skb)->frag_list;
3452 if (!list) {
1da177e4
LT		 3453 /* Non fragmented */
3454 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3455
73d80deb 3456 skb_queue_tail(queue, skb);
1da177e4
LT		 3457 } else {
3458 /* Fragmented */
3459 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3460
3461 skb_shinfo(skb)->frag_list = NULL;
3462
9cfd5a23
JR		 3463 /* Queue all fragments atomically. We need to use spin_lock_bh
3464 * here because of 6LoWPAN links, as there this function is
3465 * called from softirq and using normal spin lock could cause
3466 * deadlocks.
3467 */
3468 spin_lock_bh(&queue->lock);
1da177e4 3469
73d80deb 3470 __skb_queue_tail(queue, skb);
e702112f
AE		 3471
3472 flags &= ~ACL_START;
3473 flags |= ACL_CONT;
1da177e4
LT		 3474 do {
3475 skb = list; list = list->next;
8e87d142 3476
d79f34e3 3477 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
e702112f 3478 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 3479
3480 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3481
73d80deb 3482 __skb_queue_tail(queue, skb);
1da177e4
LT		 3483 } while (list);
3484
9cfd5a23 3485 spin_unlock_bh(&queue->lock);
1da177e4 3486 }
73d80deb
LAD		 3487}
3488
3489void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3490{
ee22be7e 3491 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 3492
f0e09510 3493 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 3494
ee22be7e 3495 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 3496
3eff45ea 3497 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 3498}
1da177e4
LT		 3499
3500/* Send SCO data */
0d861d8b 3501void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 3502{
3503 struct hci_dev *hdev = conn->hdev;
3504 struct hci_sco_hdr hdr;
3505
3506 BT_DBG("%s len %d", hdev->name, skb->len);
3507
aca3192c 3508 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 3509 hdr.dlen = skb->len;
3510
badff6d0
ACM		 3511 skb_push(skb, HCI_SCO_HDR_SIZE);
3512 skb_reset_transport_header(skb);
9c70220b 3513 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 3514
d79f34e3 3515 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
c78ae283 3516
1da177e4 3517 skb_queue_tail(&conn->data_q, skb);
3eff45ea 3518 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 3519}
1da177e4
LT		 3520
3521/* ---- HCI TX task (outgoing data) ---- */
3522
3523/* HCI Connection scheduler */
6039aa73
GP		 3524static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3525 int *quote)
1da177e4
LT		 3526{
3527 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3528 struct hci_conn *conn = NULL, *c;
abc5de8f 3529 unsigned int num = 0, min = ~0;
1da177e4 3530
8e87d142 3531 /* We don't have to lock device here. Connections are always
1da177e4 3532 * added and removed with TX task disabled. */
bf4c6325
GP		 3533
3534 rcu_read_lock();
3535
3536 list_for_each_entry_rcu(c, &h->list, list) {
769be974 3537 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 3538 continue;
769be974
MH		 3539
3540 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3541 continue;
3542
1da177e4
LT		 3543 num++;
3544
3545 if (c->sent < min) {
3546 min = c->sent;
3547 conn = c;
3548 }
52087a79
LAD		 3549
3550 if (hci_conn_num(hdev, type) == num)
3551 break;
1da177e4
LT		 3552 }
3553
bf4c6325
GP		 3554 rcu_read_unlock();
3555
1da177e4 3556 if (conn) {
6ed58ec5
VT		 3557 int cnt, q;
3558
3559 switch (conn->type) {
3560 case ACL_LINK:
3561 cnt = hdev->acl_cnt;
3562 break;
3563 case SCO_LINK:
3564 case ESCO_LINK:
3565 cnt = hdev->sco_cnt;
3566 break;
3567 case LE_LINK:
3568 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3569 break;
3570 default:
3571 cnt = 0;
3572 BT_ERR("Unknown link type");
3573 }
3574
3575 q = cnt / num;
1da177e4
LT		 3576 *quote = q ? q : 1;
3577 } else
3578 *quote = 0;
3579
3580 BT_DBG("conn %p quote %d", conn, *quote);
3581 return conn;
3582}
3583
6039aa73 3584static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 3585{
3586 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3587 struct hci_conn *c;
1da177e4 3588
bae1f5d9 3589 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 3590
bf4c6325
GP		 3591 rcu_read_lock();
3592
1da177e4 3593 /* Kill stalled connections */
bf4c6325 3594 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 3595 if (c->type == type && c->sent) {
6ed93dc6
AE		 3596 BT_ERR("%s killing stalled connection %pMR",
3597 hdev->name, &c->dst);
bed71748 3598 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 3599 }
3600 }
bf4c6325
GP		 3601
3602 rcu_read_unlock();
1da177e4
LT		 3603}
3604
6039aa73
GP		 3605static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3606 int *quote)
1da177e4 3607{
73d80deb
LAD		 3608 struct hci_conn_hash *h = &hdev->conn_hash;
3609 struct hci_chan *chan = NULL;
abc5de8f 3610 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 3611 struct hci_conn *conn;
73d80deb
LAD		 3612 int cnt, q, conn_num = 0;
3613
3614 BT_DBG("%s", hdev->name);
3615
bf4c6325
GP		 3616 rcu_read_lock();
3617
3618 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 3619 struct hci_chan *tmp;
3620
3621 if (conn->type != type)
3622 continue;
3623
3624 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3625 continue;
3626
3627 conn_num++;
3628
8192edef 3629 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 3630 struct sk_buff *skb;
3631
3632 if (skb_queue_empty(&tmp->data_q))
3633 continue;
3634
3635 skb = skb_peek(&tmp->data_q);
3636 if (skb->priority < cur_prio)
3637 continue;
3638
3639 if (skb->priority > cur_prio) {
3640 num = 0;
3641 min = ~0;
3642 cur_prio = skb->priority;
3643 }
3644
3645 num++;
3646
3647 if (conn->sent < min) {
3648 min = conn->sent;
3649 chan = tmp;
3650 }
3651 }
3652
3653 if (hci_conn_num(hdev, type) == conn_num)
3654 break;
3655 }
3656
bf4c6325
GP		 3657 rcu_read_unlock();
3658
73d80deb
LAD		 3659 if (!chan)
3660 return NULL;
3661
3662 switch (chan->conn->type) {
3663 case ACL_LINK:
3664 cnt = hdev->acl_cnt;
3665 break;
bd1eb66b
AE		 3666 case AMP_LINK:
3667 cnt = hdev->block_cnt;
3668 break;
73d80deb
LAD		 3669 case SCO_LINK:
3670 case ESCO_LINK:
3671 cnt = hdev->sco_cnt;
3672 break;
3673 case LE_LINK:
3674 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3675 break;
3676 default:
3677 cnt = 0;
3678 BT_ERR("Unknown link type");
3679 }
3680
3681 q = cnt / num;
3682 *quote = q ? q : 1;
3683 BT_DBG("chan %p quote %d", chan, *quote);
3684 return chan;
3685}
3686
02b20f0b
LAD		 3687static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3688{
3689 struct hci_conn_hash *h = &hdev->conn_hash;
3690 struct hci_conn *conn;
3691 int num = 0;
3692
3693 BT_DBG("%s", hdev->name);
3694
bf4c6325
GP		 3695 rcu_read_lock();
3696
3697 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3698 struct hci_chan *chan;
3699
3700 if (conn->type != type)
3701 continue;
3702
3703 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3704 continue;
3705
3706 num++;
3707
8192edef 3708 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3709 struct sk_buff *skb;
3710
3711 if (chan->sent) {
3712 chan->sent = 0;
3713 continue;
3714 }
3715
3716 if (skb_queue_empty(&chan->data_q))
3717 continue;
3718
3719 skb = skb_peek(&chan->data_q);
3720 if (skb->priority >= HCI_PRIO_MAX - 1)
3721 continue;
3722
3723 skb->priority = HCI_PRIO_MAX - 1;
3724
3725 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3726 skb->priority);
02b20f0b
LAD		 3727 }
3728
3729 if (hci_conn_num(hdev, type) == num)
3730 break;
3731 }
bf4c6325
GP		 3732
3733 rcu_read_unlock();
3734
02b20f0b
LAD		 3735}
3736
b71d385a
AE		 3737static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3738{
3739 /* Calculate count of blocks used by this packet */
3740 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3741}
3742
6039aa73 3743static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3744{
d7a5a11d 3745 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1da177e4
LT		 3746 /* ACL tx timeout must be longer than maximum
3747 * link supervision timeout (40.9 seconds) */
63d2bc1b 3748 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3749 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3750 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3751 }
63d2bc1b 3752}
1da177e4 3753
6039aa73 3754static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3755{
3756 unsigned int cnt = hdev->acl_cnt;
3757 struct hci_chan *chan;
3758 struct sk_buff *skb;
3759 int quote;
3760
3761 __check_timeout(hdev, cnt);
04837f64 3762
73d80deb 3763 while (hdev->acl_cnt &&
a8c5fb1a 3764 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3765 u32 priority = (skb_peek(&chan->data_q))->priority;
3766 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3767 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3768 skb->len, skb->priority);
73d80deb 3769
ec1cce24
LAD		 3770 /* Stop if priority has changed */
3771 if (skb->priority < priority)
3772 break;
3773
3774 skb = skb_dequeue(&chan->data_q);
3775
73d80deb 3776 hci_conn_enter_active_mode(chan->conn,
04124681 3777 bt_cb(skb)->force_active);
04837f64 3778
57d17d70 3779 hci_send_frame(hdev, skb);
1da177e4
LT		 3780 hdev->acl_last_tx = jiffies;
3781
3782 hdev->acl_cnt--;
73d80deb
LAD		 3783 chan->sent++;
3784 chan->conn->sent++;
1da177e4
LT		 3785 }
3786 }
02b20f0b
LAD		 3787
3788 if (cnt != hdev->acl_cnt)
3789 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3790}
3791
6039aa73 3792static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3793{
63d2bc1b 3794 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3795 struct hci_chan *chan;
3796 struct sk_buff *skb;
3797 int quote;
bd1eb66b 3798 u8 type;
b71d385a 3799
63d2bc1b 3800 __check_timeout(hdev, cnt);
b71d385a 3801
bd1eb66b
AE		 3802 BT_DBG("%s", hdev->name);
3803
3804 if (hdev->dev_type == HCI_AMP)
3805 type = AMP_LINK;
3806 else
3807 type = ACL_LINK;
3808
b71d385a 3809 while (hdev->block_cnt > 0 &&
bd1eb66b 3810 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3811 u32 priority = (skb_peek(&chan->data_q))->priority;
3812 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3813 int blocks;
3814
3815 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3816 skb->len, skb->priority);
b71d385a
AE		 3817
3818 /* Stop if priority has changed */
3819 if (skb->priority < priority)
3820 break;
3821
3822 skb = skb_dequeue(&chan->data_q);
3823
3824 blocks = __get_blocks(hdev, skb);
3825 if (blocks > hdev->block_cnt)
3826 return;
3827
3828 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3829 bt_cb(skb)->force_active);
b71d385a 3830
57d17d70 3831 hci_send_frame(hdev, skb);
b71d385a
AE		 3832 hdev->acl_last_tx = jiffies;
3833
3834 hdev->block_cnt -= blocks;
3835 quote -= blocks;
3836
3837 chan->sent += blocks;
3838 chan->conn->sent += blocks;
3839 }
3840 }
3841
3842 if (cnt != hdev->block_cnt)
bd1eb66b 3843 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3844}
3845
6039aa73 3846static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3847{
3848 BT_DBG("%s", hdev->name);
3849
bd1eb66b 3850 /* No ACL link over BR/EDR controller */
ca8bee5d 3851 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
bd1eb66b
AE		 3852 return;
3853
3854 /* No AMP link over AMP controller */
3855 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3856 return;
3857
3858 switch (hdev->flow_ctl_mode) {
3859 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3860 hci_sched_acl_pkt(hdev);
3861 break;
3862
3863 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3864 hci_sched_acl_blk(hdev);
3865 break;
3866 }
3867}
3868
1da177e4 3869/* Schedule SCO */
6039aa73 3870static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3871{
3872 struct hci_conn *conn;
3873 struct sk_buff *skb;
3874 int quote;
3875
3876 BT_DBG("%s", hdev->name);
3877
52087a79
LAD		 3878 if (!hci_conn_num(hdev, SCO_LINK))
3879 return;
3880
1da177e4
LT		 3881 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3882 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3883 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3884 hci_send_frame(hdev, skb);
1da177e4
LT		 3885
3886 conn->sent++;
3887 if (conn->sent == ~0)
3888 conn->sent = 0;
3889 }
3890 }
3891}
3892
6039aa73 3893static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3894{
3895 struct hci_conn *conn;
3896 struct sk_buff *skb;
3897 int quote;
3898
3899 BT_DBG("%s", hdev->name);
3900
52087a79
LAD		 3901 if (!hci_conn_num(hdev, ESCO_LINK))
3902 return;
3903
8fc9ced3
GP		 3904 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3905 &quote))) {
b6a0dc82
MH		 3906 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3907 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3908 hci_send_frame(hdev, skb);
b6a0dc82
MH		 3909
3910 conn->sent++;
3911 if (conn->sent == ~0)
3912 conn->sent = 0;
3913 }
3914 }
3915}
3916
6039aa73 3917static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3918{
73d80deb 3919 struct hci_chan *chan;
6ed58ec5 3920 struct sk_buff *skb;
02b20f0b 3921 int quote, cnt, tmp;
6ed58ec5
VT		 3922
3923 BT_DBG("%s", hdev->name);
3924
52087a79
LAD		 3925 if (!hci_conn_num(hdev, LE_LINK))
3926 return;
3927
d7a5a11d 3928 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
6ed58ec5
VT		 3929 /* LE tx timeout must be longer than maximum
3930 * link supervision timeout (40.9 seconds) */
bae1f5d9 3931 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3932 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3933 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3934 }
3935
3936 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3937 tmp = cnt;
73d80deb 3938 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3939 u32 priority = (skb_peek(&chan->data_q))->priority;
3940 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3941 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3942 skb->len, skb->priority);
6ed58ec5 3943
ec1cce24
LAD		 3944 /* Stop if priority has changed */
3945 if (skb->priority < priority)
3946 break;
3947
3948 skb = skb_dequeue(&chan->data_q);
3949
57d17d70 3950 hci_send_frame(hdev, skb);
6ed58ec5
VT		 3951 hdev->le_last_tx = jiffies;
3952
3953 cnt--;
73d80deb
LAD		 3954 chan->sent++;
3955 chan->conn->sent++;
6ed58ec5
VT		 3956 }
3957 }
73d80deb 3958
6ed58ec5
VT		 3959 if (hdev->le_pkts)
3960 hdev->le_cnt = cnt;
3961 else
3962 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3963
3964 if (cnt != tmp)
3965 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3966}
3967
3eff45ea 3968static void hci_tx_work(struct work_struct *work)
1da177e4 3969{
3eff45ea 3970 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3971 struct sk_buff *skb;
3972
6ed58ec5 3973 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3974 hdev->sco_cnt, hdev->le_cnt);
1da177e4 3975
d7a5a11d 3976 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
52de599e
MH		 3977 /* Schedule queues and send stuff to HCI driver */
3978 hci_sched_acl(hdev);
3979 hci_sched_sco(hdev);
3980 hci_sched_esco(hdev);
3981 hci_sched_le(hdev);
3982 }
6ed58ec5 3983
1da177e4
LT		 3984 /* Send next queued raw (unknown type) packet */
3985 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 3986 hci_send_frame(hdev, skb);
1da177e4
LT		 3987}
3988
25985edc 3989/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3990
3991/* ACL data packet */
6039aa73 3992static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3993{
3994 struct hci_acl_hdr *hdr = (void *) skb->data;
3995 struct hci_conn *conn;
3996 __u16 handle, flags;
3997
3998 skb_pull(skb, HCI_ACL_HDR_SIZE);
3999
4000 handle = __le16_to_cpu(hdr->handle);
4001 flags = hci_flags(handle);
4002 handle = hci_handle(handle);
4003
f0e09510 4004 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 4005 handle, flags);
1da177e4
LT		 4006
4007 hdev->stat.acl_rx++;
4008
4009 hci_dev_lock(hdev);
4010 conn = hci_conn_hash_lookup_handle(hdev, handle);
4011 hci_dev_unlock(hdev);
8e87d142 4012
1da177e4 4013 if (conn) {
65983fc7 4014 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 4015
1da177e4 4016 /* Send to upper protocol */
686ebf28
UF		 4017 l2cap_recv_acldata(conn, skb, flags);
4018 return;
1da177e4 4019 } else {
8e87d142 4020 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 4021 hdev->name, handle);
1da177e4
LT		 4022 }
4023
4024 kfree_skb(skb);
4025}
4026
4027/* SCO data packet */
6039aa73 4028static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 4029{
4030 struct hci_sco_hdr *hdr = (void *) skb->data;
4031 struct hci_conn *conn;
4032 __u16 handle;
4033
4034 skb_pull(skb, HCI_SCO_HDR_SIZE);
4035
4036 handle = __le16_to_cpu(hdr->handle);
4037
f0e09510 4038 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 4039
4040 hdev->stat.sco_rx++;
4041
4042 hci_dev_lock(hdev);
4043 conn = hci_conn_hash_lookup_handle(hdev, handle);
4044 hci_dev_unlock(hdev);
4045
4046 if (conn) {
1da177e4 4047 /* Send to upper protocol */
686ebf28
UF		 4048 sco_recv_scodata(conn, skb);
4049 return;
1da177e4 4050 } else {
8e87d142 4051 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 4052 hdev->name, handle);
1da177e4
LT		 4053 }
4054
4055 kfree_skb(skb);
4056}
4057
9238f36a
JH		 4058static bool hci_req_is_complete(struct hci_dev *hdev)
4059{
4060 struct sk_buff *skb;
4061
4062 skb = skb_peek(&hdev->cmd_q);
4063 if (!skb)
4064 return true;
4065
44d27137 4066 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
9238f36a
JH		 4067}
4068
42c6b129
JH		 4069static void hci_resend_last(struct hci_dev *hdev)
4070{
4071 struct hci_command_hdr *sent;
4072 struct sk_buff *skb;
4073 u16 opcode;
4074
4075 if (!hdev->sent_cmd)
4076 return;
4077
4078 sent = (void *) hdev->sent_cmd->data;
4079 opcode = __le16_to_cpu(sent->opcode);
4080 if (opcode == HCI_OP_RESET)
4081 return;
4082
4083 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4084 if (!skb)
4085 return;
4086
4087 skb_queue_head(&hdev->cmd_q, skb);
4088 queue_work(hdev->workqueue, &hdev->cmd_work);
4089}
4090
e6214487
JH		 4091void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4092 hci_req_complete_t *req_complete,
4093 hci_req_complete_skb_t *req_complete_skb)
9238f36a 4094{
9238f36a
JH		 4095 struct sk_buff *skb;
4096 unsigned long flags;
4097
4098 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4099
42c6b129
JH		 4100 /* If the completed command doesn't match the last one that was
4101 * sent we need to do special handling of it.
9238f36a 4102 */
42c6b129
JH		 4103 if (!hci_sent_cmd_data(hdev, opcode)) {
4104 /* Some CSR based controllers generate a spontaneous
4105 * reset complete event during init and any pending
4106 * command will never be completed. In such a case we
4107 * need to resend whatever was the last sent
4108 * command.
4109 */
4110 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4111 hci_resend_last(hdev);
4112
9238f36a 4113 return;
42c6b129 4114 }
9238f36a
JH		 4115
4116 /* If the command succeeded and there's still more commands in
4117 * this request the request is not yet complete.
4118 */
4119 if (!status && !hci_req_is_complete(hdev))
4120 return;
4121
4122 /* If this was the last command in a request the complete
4123 * callback would be found in hdev->sent_cmd instead of the
4124 * command queue (hdev->cmd_q).
4125 */
44d27137
JH		 4126 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4127 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
e6214487
JH		 4128 return;
4129 }
53e21fbc 4130
44d27137
JH		 4131 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4132 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
e6214487 4133 return;
9238f36a
JH		 4134 }
4135
4136 /* Remove all pending commands belonging to this request */
4137 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4138 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
44d27137 4139 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
9238f36a
JH		 4140 __skb_queue_head(&hdev->cmd_q, skb);
4141 break;
4142 }
4143
3bd7594e
DA		 4144 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4145 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4146 else
4147 *req_complete = bt_cb(skb)->hci.req_complete;
9238f36a
JH		 4148 kfree_skb(skb);
4149 }
4150 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
9238f36a
JH		 4151}
4152
b78752cc 4153static void hci_rx_work(struct work_struct *work)
1da177e4 4154{
b78752cc 4155 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 4156 struct sk_buff *skb;
4157
4158 BT_DBG("%s", hdev->name);
4159
1da177e4 4160 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 4161 /* Send copy to monitor */
4162 hci_send_to_monitor(hdev, skb);
4163
1da177e4
LT		 4164 if (atomic_read(&hdev->promisc)) {
4165 /* Send copy to the sockets */
470fe1b5 4166 hci_send_to_sock(hdev, skb);
1da177e4
LT		 4167 }
4168
d7a5a11d 4169 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1da177e4
LT		 4170 kfree_skb(skb);
4171 continue;
4172 }
4173
4174 if (test_bit(HCI_INIT, &hdev->flags)) {
4175 /* Don't process data packets in this states. */
d79f34e3 4176 switch (hci_skb_pkt_type(skb)) {
1da177e4
LT		 4177 case HCI_ACLDATA_PKT:
4178 case HCI_SCODATA_PKT:
4179 kfree_skb(skb);
4180 continue;
3ff50b79 4181 }
1da177e4
LT		 4182 }
4183
4184 /* Process frame */
d79f34e3 4185 switch (hci_skb_pkt_type(skb)) {
1da177e4 4186 case HCI_EVENT_PKT:
b78752cc 4187 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 4188 hci_event_packet(hdev, skb);
4189 break;
4190
4191 case HCI_ACLDATA_PKT:
4192 BT_DBG("%s ACL data packet", hdev->name);
4193 hci_acldata_packet(hdev, skb);
4194 break;
4195
4196 case HCI_SCODATA_PKT:
4197 BT_DBG("%s SCO data packet", hdev->name);
4198 hci_scodata_packet(hdev, skb);
4199 break;
4200
4201 default:
4202 kfree_skb(skb);
4203 break;
4204 }
4205 }
1da177e4
LT		 4206}
4207
c347b765 4208static void hci_cmd_work(struct work_struct *work)
1da177e4 4209{
c347b765 4210 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 4211 struct sk_buff *skb;
4212
2104786b
AE		 4213 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4214 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 4215
1da177e4 4216 /* Send queued commands */
5a08ecce
AE		 4217 if (atomic_read(&hdev->cmd_cnt)) {
4218 skb = skb_dequeue(&hdev->cmd_q);
4219 if (!skb)
4220 return;
4221
7585b97a 4222 kfree_skb(hdev->sent_cmd);
1da177e4 4223
a675d7f1 4224 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 4225 if (hdev->sent_cmd) {
1da177e4 4226 atomic_dec(&hdev->cmd_cnt);
57d17d70 4227 hci_send_frame(hdev, skb);
7bdb8a5c 4228 if (test_bit(HCI_RESET, &hdev->flags))
65cc2b49 4229 cancel_delayed_work(&hdev->cmd_timer);
7bdb8a5c 4230 else
65cc2b49
MH		 4231 schedule_delayed_work(&hdev->cmd_timer,
4232 HCI_CMD_TIMEOUT);
1da177e4
LT		 4233 } else {
4234 skb_queue_head(&hdev->cmd_q, skb);
c347b765 4235 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 4236 }
4237 }
4238}
Linux kernel - Deliverables
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