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Merge remote-tracking branch 'lightnvm/for-next'
[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 &&
8ae8e264 1565 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
2ff13894
JH		 1566 hci_dev_test_flag(hdev, HCI_MGMT))
1567 __mgmt_power_off(hdev);
1aeb9c65 1568
1f9b9a5d 1569 hci_inquiry_cache_flush(hdev);
d7347f3c 1570 hci_pend_le_actions_clear(hdev);
f161dd41 1571 hci_conn_hash_flush(hdev);
09fd0de5 1572 hci_dev_unlock(hdev);
1da177e4 1573
64dae967
MH		 1574 smp_unregister(hdev);
1575
05fcd4c4 1576 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1da177e4
LT		 1577
1578 if (hdev->flush)
1579 hdev->flush(hdev);
1580
1581 /* Reset device */
1582 skb_queue_purge(&hdev->cmd_q);
1583 atomic_set(&hdev->cmd_cnt, 1);
acc649c6
MH		 1584 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1585 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1da177e4 1586 set_bit(HCI_INIT, &hdev->flags);
4ebeee2d 1587 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1da177e4
LT		 1588 clear_bit(HCI_INIT, &hdev->flags);
1589 }
1590
c347b765
GP		 1591 /* flush cmd work */
1592 flush_work(&hdev->cmd_work);
1da177e4
LT		 1593
1594 /* Drop queues */
1595 skb_queue_purge(&hdev->rx_q);
1596 skb_queue_purge(&hdev->cmd_q);
1597 skb_queue_purge(&hdev->raw_q);
1598
1599 /* Drop last sent command */
1600 if (hdev->sent_cmd) {
65cc2b49 1601 cancel_delayed_work_sync(&hdev->cmd_timer);
1da177e4
LT		 1602 kfree_skb(hdev->sent_cmd);
1603 hdev->sent_cmd = NULL;
1604 }
1605
e9ca8bf1 1606 clear_bit(HCI_RUNNING, &hdev->flags);
05fcd4c4 1607 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
4a3f95b7 1608
1da177e4
LT		 1609 /* After this point our queues are empty
1610 * and no tasks are scheduled. */
1611 hdev->close(hdev);
1612
35b973c9 1613 /* Clear flags */
fee746b0 1614 hdev->flags &= BIT(HCI_RAW);
eacb44df 1615 hci_dev_clear_volatile_flags(hdev);
35b973c9 1616
ced5c338 1617 /* Controller radio is available but is currently powered down */
536619e8 1618 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
ced5c338 1619
e59fda8d 1620 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 1621 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
7a4cd51d 1622 bacpy(&hdev->random_addr, BDADDR_ANY);
e59fda8d 1623
b504430c 1624 hci_req_sync_unlock(hdev);
1da177e4
LT		 1625
1626 hci_dev_put(hdev);
1627 return 0;
1628}
1629
1630int hci_dev_close(__u16 dev)
1631{
1632 struct hci_dev *hdev;
1633 int err;
1634
70f23020
AE		 1635 hdev = hci_dev_get(dev);
1636 if (!hdev)
1da177e4 1637 return -ENODEV;
8ee56540 1638
d7a5a11d 1639 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1640 err = -EBUSY;
1641 goto done;
1642 }
1643
a69d8927 1644 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
8ee56540
MH		 1645 cancel_delayed_work(&hdev->power_off);
1646
1da177e4 1647 err = hci_dev_do_close(hdev);
8ee56540 1648
0736cfa8 1649done:
1da177e4
LT		 1650 hci_dev_put(hdev);
1651 return err;
1652}
1653
5c912495 1654static int hci_dev_do_reset(struct hci_dev *hdev)
1da177e4 1655{
5c912495 1656 int ret;
1da177e4 1657
5c912495 1658 BT_DBG("%s %p", hdev->name, hdev);
1da177e4 1659
b504430c 1660 hci_req_sync_lock(hdev);
1da177e4 1661
1da177e4
LT		 1662 /* Drop queues */
1663 skb_queue_purge(&hdev->rx_q);
1664 skb_queue_purge(&hdev->cmd_q);
1665
76727c02
JH		 1666 /* Avoid potential lockdep warnings from the *_flush() calls by
1667 * ensuring the workqueue is empty up front.
1668 */
1669 drain_workqueue(hdev->workqueue);
1670
09fd0de5 1671 hci_dev_lock(hdev);
1f9b9a5d 1672 hci_inquiry_cache_flush(hdev);
1da177e4 1673 hci_conn_hash_flush(hdev);
09fd0de5 1674 hci_dev_unlock(hdev);
1da177e4
LT		 1675
1676 if (hdev->flush)
1677 hdev->flush(hdev);
1678
8e87d142 1679 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 1680 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4 1681
4ebeee2d 1682 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1da177e4 1683
b504430c 1684 hci_req_sync_unlock(hdev);
1da177e4
LT		 1685 return ret;
1686}
1687
5c912495
MH		 1688int hci_dev_reset(__u16 dev)
1689{
1690 struct hci_dev *hdev;
1691 int err;
1692
1693 hdev = hci_dev_get(dev);
1694 if (!hdev)
1695 return -ENODEV;
1696
1697 if (!test_bit(HCI_UP, &hdev->flags)) {
1698 err = -ENETDOWN;
1699 goto done;
1700 }
1701
d7a5a11d 1702 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
5c912495
MH		 1703 err = -EBUSY;
1704 goto done;
1705 }
1706
d7a5a11d 1707 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
5c912495
MH		 1708 err = -EOPNOTSUPP;
1709 goto done;
1710 }
1711
1712 err = hci_dev_do_reset(hdev);
1713
1714done:
1715 hci_dev_put(hdev);
1716 return err;
1717}
1718
1da177e4
LT		 1719int hci_dev_reset_stat(__u16 dev)
1720{
1721 struct hci_dev *hdev;
1722 int ret = 0;
1723
70f23020
AE		 1724 hdev = hci_dev_get(dev);
1725 if (!hdev)
1da177e4
LT		 1726 return -ENODEV;
1727
d7a5a11d 1728 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1729 ret = -EBUSY;
1730 goto done;
1731 }
1732
d7a5a11d 1733 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
fee746b0
MH		 1734 ret = -EOPNOTSUPP;
1735 goto done;
1736 }
1737
1da177e4
LT		 1738 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1739
0736cfa8 1740done:
1da177e4 1741 hci_dev_put(hdev);
1da177e4
LT		 1742 return ret;
1743}
1744
123abc08
JH		 1745static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1746{
bc6d2d04 1747 bool conn_changed, discov_changed;
123abc08
JH		 1748
1749 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1750
1751 if ((scan & SCAN_PAGE))
238be788
MH		 1752 conn_changed = !hci_dev_test_and_set_flag(hdev,
1753 HCI_CONNECTABLE);
123abc08 1754 else
a69d8927
MH		 1755 conn_changed = hci_dev_test_and_clear_flag(hdev,
1756 HCI_CONNECTABLE);
123abc08 1757
bc6d2d04 1758 if ((scan & SCAN_INQUIRY)) {
238be788
MH		 1759 discov_changed = !hci_dev_test_and_set_flag(hdev,
1760 HCI_DISCOVERABLE);
bc6d2d04 1761 } else {
a358dc11 1762 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
a69d8927
MH		 1763 discov_changed = hci_dev_test_and_clear_flag(hdev,
1764 HCI_DISCOVERABLE);
bc6d2d04
JH		 1765 }
1766
d7a5a11d 1767 if (!hci_dev_test_flag(hdev, HCI_MGMT))
123abc08
JH		 1768 return;
1769
bc6d2d04
JH		 1770 if (conn_changed || discov_changed) {
1771 /* In case this was disabled through mgmt */
a1536da2 1772 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
bc6d2d04 1773
d7a5a11d 1774 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
cab054ab 1775 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
bc6d2d04 1776
123abc08 1777 mgmt_new_settings(hdev);
bc6d2d04 1778 }
123abc08
JH		 1779}
1780
1da177e4
LT		 1781int hci_dev_cmd(unsigned int cmd, void __user *arg)
1782{
1783 struct hci_dev *hdev;
1784 struct hci_dev_req dr;
1785 int err = 0;
1786
1787 if (copy_from_user(&dr, arg, sizeof(dr)))
1788 return -EFAULT;
1789
70f23020
AE		 1790 hdev = hci_dev_get(dr.dev_id);
1791 if (!hdev)
1da177e4
LT		 1792 return -ENODEV;
1793
d7a5a11d 1794 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
0736cfa8
MH		 1795 err = -EBUSY;
1796 goto done;
1797 }
1798
d7a5a11d 1799 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
fee746b0
MH		 1800 err = -EOPNOTSUPP;
1801 goto done;
1802 }
1803
ca8bee5d 1804 if (hdev->dev_type != HCI_PRIMARY) {
5b69bef5
MH		 1805 err = -EOPNOTSUPP;
1806 goto done;
1807 }
1808
d7a5a11d 1809 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
56f87901
JH		 1810 err = -EOPNOTSUPP;
1811 goto done;
1812 }
1813
1da177e4
LT		 1814 switch (cmd) {
1815 case HCISETAUTH:
01178cd4 1816 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
4ebeee2d 1817 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1818 break;
1819
1820 case HCISETENCRYPT:
1821 if (!lmp_encrypt_capable(hdev)) {
1822 err = -EOPNOTSUPP;
1823 break;
1824 }
1825
1826 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1827 /* Auth must be enabled first */
01178cd4 1828 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
4ebeee2d 1829 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1830 if (err)
1831 break;
1832 }
1833
01178cd4 1834 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
4ebeee2d 1835 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1836 break;
1837
1838 case HCISETSCAN:
01178cd4 1839 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
4ebeee2d 1840 HCI_INIT_TIMEOUT, NULL);
91a668b0 1841
bc6d2d04
JH		 1842 /* Ensure that the connectable and discoverable states
1843 * get correctly modified as this was a non-mgmt change.
91a668b0 1844 */
123abc08
JH		 1845 if (!err)
1846 hci_update_scan_state(hdev, dr.dev_opt);
1da177e4
LT		 1847 break;
1848
1da177e4 1849 case HCISETLINKPOL:
01178cd4 1850 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
4ebeee2d 1851 HCI_INIT_TIMEOUT, NULL);
1da177e4
LT		 1852 break;
1853
1854 case HCISETLINKMODE:
e4e8e37c
MH		 1855 hdev->link_mode = ((__u16) dr.dev_opt) &
1856 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1857 break;
1858
1859 case HCISETPTYPE:
1860 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 1861 break;
1862
1863 case HCISETACLMTU:
e4e8e37c
MH		 1864 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1865 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1866 break;
1867
1868 case HCISETSCOMTU:
e4e8e37c
MH		 1869 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1870 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 1871 break;
1872
1873 default:
1874 err = -EINVAL;
1875 break;
1876 }
e4e8e37c 1877
0736cfa8 1878done:
1da177e4
LT		 1879 hci_dev_put(hdev);
1880 return err;
1881}
1882
1883int hci_get_dev_list(void __user *arg)
1884{
8035ded4 1885 struct hci_dev *hdev;
1da177e4
LT		 1886 struct hci_dev_list_req *dl;
1887 struct hci_dev_req *dr;
1da177e4
LT		 1888 int n = 0, size, err;
1889 __u16 dev_num;
1890
1891 if (get_user(dev_num, (__u16 __user *) arg))
1892 return -EFAULT;
1893
1894 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1895 return -EINVAL;
1896
1897 size = sizeof(*dl) + dev_num * sizeof(*dr);
1898
70f23020
AE		 1899 dl = kzalloc(size, GFP_KERNEL);
1900 if (!dl)
1da177e4
LT		 1901 return -ENOMEM;
1902
1903 dr = dl->dev_req;
1904
f20d09d5 1905 read_lock(&hci_dev_list_lock);
8035ded4 1906 list_for_each_entry(hdev, &hci_dev_list, list) {
2e84d8db 1907 unsigned long flags = hdev->flags;
c542a06c 1908
2e84d8db
MH		 1909 /* When the auto-off is configured it means the transport
1910 * is running, but in that case still indicate that the
1911 * device is actually down.
1912 */
d7a5a11d 1913 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2e84d8db 1914 flags &= ~BIT(HCI_UP);
c542a06c 1915
1da177e4 1916 (dr + n)->dev_id = hdev->id;
2e84d8db 1917 (dr + n)->dev_opt = flags;
c542a06c 1918
1da177e4
LT		 1919 if (++n >= dev_num)
1920 break;
1921 }
f20d09d5 1922 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1923
1924 dl->dev_num = n;
1925 size = sizeof(*dl) + n * sizeof(*dr);
1926
1927 err = copy_to_user(arg, dl, size);
1928 kfree(dl);
1929
1930 return err ? -EFAULT : 0;
1931}
1932
1933int hci_get_dev_info(void __user *arg)
1934{
1935 struct hci_dev *hdev;
1936 struct hci_dev_info di;
2e84d8db 1937 unsigned long flags;
1da177e4
LT		 1938 int err = 0;
1939
1940 if (copy_from_user(&di, arg, sizeof(di)))
1941 return -EFAULT;
1942
70f23020
AE		 1943 hdev = hci_dev_get(di.dev_id);
1944 if (!hdev)
1da177e4
LT		 1945 return -ENODEV;
1946
2e84d8db
MH		 1947 /* When the auto-off is configured it means the transport
1948 * is running, but in that case still indicate that the
1949 * device is actually down.
1950 */
d7a5a11d 1951 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2e84d8db
MH		 1952 flags = hdev->flags & ~BIT(HCI_UP);
1953 else
1954 flags = hdev->flags;
c542a06c 1955
1da177e4
LT		 1956 strcpy(di.name, hdev->name);
1957 di.bdaddr = hdev->bdaddr;
60f2a3ed 1958 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2e84d8db 1959 di.flags = flags;
1da177e4 1960 di.pkt_type = hdev->pkt_type;
572c7f84
JH		 1961 if (lmp_bredr_capable(hdev)) {
1962 di.acl_mtu = hdev->acl_mtu;
1963 di.acl_pkts = hdev->acl_pkts;
1964 di.sco_mtu = hdev->sco_mtu;
1965 di.sco_pkts = hdev->sco_pkts;
1966 } else {
1967 di.acl_mtu = hdev->le_mtu;
1968 di.acl_pkts = hdev->le_pkts;
1969 di.sco_mtu = 0;
1970 di.sco_pkts = 0;
1971 }
1da177e4
LT		 1972 di.link_policy = hdev->link_policy;
1973 di.link_mode = hdev->link_mode;
1974
1975 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1976 memcpy(&di.features, &hdev->features, sizeof(di.features));
1977
1978 if (copy_to_user(arg, &di, sizeof(di)))
1979 err = -EFAULT;
1980
1981 hci_dev_put(hdev);
1982
1983 return err;
1984}
1985
1986/* ---- Interface to HCI drivers ---- */
1987
611b30f7
MH		 1988static int hci_rfkill_set_block(void *data, bool blocked)
1989{
1990 struct hci_dev *hdev = data;
1991
1992 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1993
d7a5a11d 1994 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
0736cfa8
MH		 1995 return -EBUSY;
1996
5e130367 1997 if (blocked) {
a1536da2 1998 hci_dev_set_flag(hdev, HCI_RFKILLED);
d7a5a11d
MH		 1999 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2000 !hci_dev_test_flag(hdev, HCI_CONFIG))
bf543036 2001 hci_dev_do_close(hdev);
5e130367 2002 } else {
a358dc11 2003 hci_dev_clear_flag(hdev, HCI_RFKILLED);
1025c04c 2004 }
611b30f7
MH		 2005
2006 return 0;
2007}
2008
2009static const struct rfkill_ops hci_rfkill_ops = {
2010 .set_block = hci_rfkill_set_block,
2011};
2012
ab81cbf9
JH		 2013static void hci_power_on(struct work_struct *work)
2014{
2015 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
96570ffc 2016 int err;
ab81cbf9
JH		 2017
2018 BT_DBG("%s", hdev->name);
2019
2ff13894
JH		 2020 if (test_bit(HCI_UP, &hdev->flags) &&
2021 hci_dev_test_flag(hdev, HCI_MGMT) &&
2022 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
d82142a8 2023 cancel_delayed_work(&hdev->power_off);
2ff13894
JH		 2024 hci_req_sync_lock(hdev);
2025 err = __hci_req_hci_power_on(hdev);
2026 hci_req_sync_unlock(hdev);
2027 mgmt_power_on(hdev, err);
2028 return;
2029 }
2030
cbed0ca1 2031 err = hci_dev_do_open(hdev);
96570ffc 2032 if (err < 0) {
3ad67582 2033 hci_dev_lock(hdev);
96570ffc 2034 mgmt_set_powered_failed(hdev, err);
3ad67582 2035 hci_dev_unlock(hdev);
ab81cbf9 2036 return;
96570ffc 2037 }
ab81cbf9 2038
a5c8f270
MH		 2039 /* During the HCI setup phase, a few error conditions are
2040 * ignored and they need to be checked now. If they are still
2041 * valid, it is important to turn the device back off.
2042 */
d7a5a11d
MH		 2043 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2044 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
ca8bee5d 2045 (hdev->dev_type == HCI_PRIMARY &&
a5c8f270
MH		 2046 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2047 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
a358dc11 2048 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
bf543036 2049 hci_dev_do_close(hdev);
d7a5a11d 2050 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
19202573
JH		 2051 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2052 HCI_AUTO_OFF_TIMEOUT);
bf543036 2053 }
ab81cbf9 2054
a69d8927 2055 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
4a964404
MH		 2056 /* For unconfigured devices, set the HCI_RAW flag
2057 * so that userspace can easily identify them.
4a964404 2058 */
d7a5a11d 2059 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4a964404 2060 set_bit(HCI_RAW, &hdev->flags);
0602a8ad
MH		 2061
2062 /* For fully configured devices, this will send
2063 * the Index Added event. For unconfigured devices,
2064 * it will send Unconfigued Index Added event.
2065 *
2066 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2067 * and no event will be send.
2068 */
2069 mgmt_index_added(hdev);
a69d8927 2070 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
5ea234d3
MH		 2071 /* When the controller is now configured, then it
2072 * is important to clear the HCI_RAW flag.
2073 */
d7a5a11d 2074 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
5ea234d3
MH		 2075 clear_bit(HCI_RAW, &hdev->flags);
2076
d603b76b
MH		 2077 /* Powering on the controller with HCI_CONFIG set only
2078 * happens with the transition from unconfigured to
2079 * configured. This will send the Index Added event.
2080 */
744cf19e 2081 mgmt_index_added(hdev);
fee746b0 2082 }
ab81cbf9
JH		 2083}
2084
2085static void hci_power_off(struct work_struct *work)
2086{
3243553f 2087 struct hci_dev *hdev = container_of(work, struct hci_dev,
a8c5fb1a 2088 power_off.work);
ab81cbf9
JH		 2089
2090 BT_DBG("%s", hdev->name);
2091
8ee56540 2092 hci_dev_do_close(hdev);
ab81cbf9
JH		 2093}
2094
c7741d16
MH		 2095static void hci_error_reset(struct work_struct *work)
2096{
2097 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2098
2099 BT_DBG("%s", hdev->name);
2100
2101 if (hdev->hw_error)
2102 hdev->hw_error(hdev, hdev->hw_error_code);
2103 else
2104 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2105 hdev->hw_error_code);
2106
2107 if (hci_dev_do_close(hdev))
2108 return;
2109
c7741d16
MH		 2110 hci_dev_do_open(hdev);
2111}
2112
35f7498a 2113void hci_uuids_clear(struct hci_dev *hdev)
2aeb9a1a 2114{
4821002c 2115 struct bt_uuid *uuid, *tmp;
2aeb9a1a 2116
4821002c
JH		 2117 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2118 list_del(&uuid->list);
2aeb9a1a
JH		 2119 kfree(uuid);
2120 }
2aeb9a1a
JH		 2121}
2122
35f7498a 2123void hci_link_keys_clear(struct hci_dev *hdev)
55ed8ca1 2124{
0378b597 2125 struct link_key *key;
55ed8ca1 2126
0378b597
JH		 2127 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2128 list_del_rcu(&key->list);
2129 kfree_rcu(key, rcu);
55ed8ca1 2130 }
55ed8ca1
JH		 2131}
2132
35f7498a 2133void hci_smp_ltks_clear(struct hci_dev *hdev)
b899efaf 2134{
970d0f1b 2135 struct smp_ltk *k;
b899efaf 2136
970d0f1b
JH		 2137 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2138 list_del_rcu(&k->list);
2139 kfree_rcu(k, rcu);
b899efaf 2140 }
b899efaf
VCG		 2141}
2142
970c4e46
JH		 2143void hci_smp_irks_clear(struct hci_dev *hdev)
2144{
adae20cb 2145 struct smp_irk *k;
970c4e46 2146
adae20cb
JH		 2147 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2148 list_del_rcu(&k->list);
2149 kfree_rcu(k, rcu);
970c4e46
JH		 2150 }
2151}
2152
55ed8ca1
JH		 2153struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2154{
8035ded4 2155 struct link_key *k;
55ed8ca1 2156
0378b597
JH		 2157 rcu_read_lock();
2158 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2159 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2160 rcu_read_unlock();
55ed8ca1 2161 return k;
0378b597
JH		 2162 }
2163 }
2164 rcu_read_unlock();
55ed8ca1
JH		 2165
2166 return NULL;
2167}
2168
745c0ce3 2169static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
a8c5fb1a 2170 u8 key_type, u8 old_key_type)
d25e28ab
JH		 2171{
2172 /* Legacy key */
2173 if (key_type < 0x03)
745c0ce3 2174 return true;
d25e28ab
JH		 2175
2176 /* Debug keys are insecure so don't store them persistently */
2177 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 2178 return false;
d25e28ab
JH		 2179
2180 /* Changed combination key and there's no previous one */
2181 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 2182 return false;
d25e28ab
JH		 2183
2184 /* Security mode 3 case */
2185 if (!conn)
745c0ce3 2186 return true;
d25e28ab 2187
e3befab9
JH		 2188 /* BR/EDR key derived using SC from an LE link */
2189 if (conn->type == LE_LINK)
2190 return true;
2191
d25e28ab
JH		 2192 /* Neither local nor remote side had no-bonding as requirement */
2193 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 2194 return true;
d25e28ab
JH		 2195
2196 /* Local side had dedicated bonding as requirement */
2197 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 2198 return true;
d25e28ab
JH		 2199
2200 /* Remote side had dedicated bonding as requirement */
2201 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 2202 return true;
d25e28ab
JH		 2203
2204 /* If none of the above criteria match, then don't store the key
2205 * persistently */
745c0ce3 2206 return false;
d25e28ab
JH		 2207}
2208
e804d25d 2209static u8 ltk_role(u8 type)
98a0b845 2210{
e804d25d
JH		 2211 if (type == SMP_LTK)
2212 return HCI_ROLE_MASTER;
98a0b845 2213
e804d25d 2214 return HCI_ROLE_SLAVE;
98a0b845
JH		 2215}
2216
f3a73d97
JH		 2217struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2218 u8 addr_type, u8 role)
75d262c2 2219{
c9839a11 2220 struct smp_ltk *k;
75d262c2 2221
970d0f1b
JH		 2222 rcu_read_lock();
2223 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
5378bc56
JH		 2224 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2225 continue;
2226
923e2414 2227 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
970d0f1b 2228 rcu_read_unlock();
75d262c2 2229 return k;
970d0f1b
JH		 2230 }
2231 }
2232 rcu_read_unlock();
75d262c2
VCG		 2233
2234 return NULL;
2235}
75d262c2 2236
970c4e46
JH		 2237struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2238{
2239 struct smp_irk *irk;
2240
adae20cb
JH		 2241 rcu_read_lock();
2242 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2243 if (!bacmp(&irk->rpa, rpa)) {
2244 rcu_read_unlock();
970c4e46 2245 return irk;
adae20cb 2246 }
970c4e46
JH		 2247 }
2248
adae20cb 2249 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
defce9e8 2250 if (smp_irk_matches(hdev, irk->val, rpa)) {
970c4e46 2251 bacpy(&irk->rpa, rpa);
adae20cb 2252 rcu_read_unlock();
970c4e46
JH		 2253 return irk;
2254 }
2255 }
adae20cb 2256 rcu_read_unlock();
970c4e46
JH		 2257
2258 return NULL;
2259}
2260
2261struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2262 u8 addr_type)
2263{
2264 struct smp_irk *irk;
2265
6cfc9988
JH		 2266 /* Identity Address must be public or static random */
2267 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2268 return NULL;
2269
adae20cb
JH		 2270 rcu_read_lock();
2271 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
970c4e46 2272 if (addr_type == irk->addr_type &&
adae20cb
JH		 2273 bacmp(bdaddr, &irk->bdaddr) == 0) {
2274 rcu_read_unlock();
970c4e46 2275 return irk;
adae20cb 2276 }
970c4e46 2277 }
adae20cb 2278 rcu_read_unlock();
970c4e46
JH		 2279
2280 return NULL;
2281}
2282
567fa2aa 2283struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
7652ff6a
JH		 2284 bdaddr_t *bdaddr, u8 *val, u8 type,
2285 u8 pin_len, bool *persistent)
55ed8ca1
JH		 2286{
2287 struct link_key *key, *old_key;
745c0ce3 2288 u8 old_key_type;
55ed8ca1
JH		 2289
2290 old_key = hci_find_link_key(hdev, bdaddr);
2291 if (old_key) {
2292 old_key_type = old_key->type;
2293 key = old_key;
2294 } else {
12adcf3a 2295 old_key_type = conn ? conn->key_type : 0xff;
0a14ab41 2296 key = kzalloc(sizeof(*key), GFP_KERNEL);
55ed8ca1 2297 if (!key)
567fa2aa 2298 return NULL;
0378b597 2299 list_add_rcu(&key->list, &hdev->link_keys);
55ed8ca1
JH		 2300 }
2301
6ed93dc6 2302 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
55ed8ca1 2303
d25e28ab
JH		 2304 /* Some buggy controller combinations generate a changed
2305 * combination key for legacy pairing even when there's no
2306 * previous key */
2307 if (type == HCI_LK_CHANGED_COMBINATION &&
a8c5fb1a 2308 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
d25e28ab 2309 type = HCI_LK_COMBINATION;
655fe6ec
JH		 2310 if (conn)
2311 conn->key_type = type;
2312 }
d25e28ab 2313
55ed8ca1 2314 bacpy(&key->bdaddr, bdaddr);
9b3b4460 2315 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
55ed8ca1
JH		 2316 key->pin_len = pin_len;
2317
b6020ba0 2318 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 2319 key->type = old_key_type;
4748fed2
JH		 2320 else
2321 key->type = type;
2322
7652ff6a
JH		 2323 if (persistent)
2324 *persistent = hci_persistent_key(hdev, conn, type,
2325 old_key_type);
4df378a1 2326
567fa2aa 2327 return key;
55ed8ca1
JH		 2328}
2329
ca9142b8 2330struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
35d70271 2331 u8 addr_type, u8 type, u8 authenticated,
fe39c7b2 2332 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
75d262c2 2333{
c9839a11 2334 struct smp_ltk *key, *old_key;
e804d25d 2335 u8 role = ltk_role(type);
75d262c2 2336
f3a73d97 2337 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
c9839a11 2338 if (old_key)
75d262c2 2339 key = old_key;
c9839a11 2340 else {
0a14ab41 2341 key = kzalloc(sizeof(*key), GFP_KERNEL);
75d262c2 2342 if (!key)
ca9142b8 2343 return NULL;
970d0f1b 2344 list_add_rcu(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 2345 }
2346
75d262c2 2347 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 2348 key->bdaddr_type = addr_type;
2349 memcpy(key->val, tk, sizeof(key->val));
2350 key->authenticated = authenticated;
2351 key->ediv = ediv;
fe39c7b2 2352 key->rand = rand;
c9839a11
VCG		 2353 key->enc_size = enc_size;
2354 key->type = type;
75d262c2 2355
ca9142b8 2356 return key;
75d262c2
VCG		 2357}
2358
ca9142b8
JH		 2359struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2360 u8 addr_type, u8 val[16], bdaddr_t *rpa)
970c4e46
JH		 2361{
2362 struct smp_irk *irk;
2363
2364 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2365 if (!irk) {
2366 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2367 if (!irk)
ca9142b8 2368 return NULL;
970c4e46
JH		 2369
2370 bacpy(&irk->bdaddr, bdaddr);
2371 irk->addr_type = addr_type;
2372
adae20cb 2373 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
970c4e46
JH		 2374 }
2375
2376 memcpy(irk->val, val, 16);
2377 bacpy(&irk->rpa, rpa);
2378
ca9142b8 2379 return irk;
970c4e46
JH		 2380}
2381
55ed8ca1
JH		 2382int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2383{
2384 struct link_key *key;
2385
2386 key = hci_find_link_key(hdev, bdaddr);
2387 if (!key)
2388 return -ENOENT;
2389
6ed93dc6 2390 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
55ed8ca1 2391
0378b597
JH		 2392 list_del_rcu(&key->list);
2393 kfree_rcu(key, rcu);
55ed8ca1
JH		 2394
2395 return 0;
2396}
2397
e0b2b27e 2398int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
b899efaf 2399{
970d0f1b 2400 struct smp_ltk *k;
c51ffa0b 2401 int removed = 0;
b899efaf 2402
970d0f1b 2403 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
e0b2b27e 2404 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
b899efaf
VCG		 2405 continue;
2406
6ed93dc6 2407 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
b899efaf 2408
970d0f1b
JH		 2409 list_del_rcu(&k->list);
2410 kfree_rcu(k, rcu);
c51ffa0b 2411 removed++;
b899efaf
VCG		 2412 }
2413
c51ffa0b 2414 return removed ? 0 : -ENOENT;
b899efaf
VCG		 2415}
2416
a7ec7338
JH		 2417void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2418{
adae20cb 2419 struct smp_irk *k;
a7ec7338 2420
adae20cb 2421 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
a7ec7338
JH		 2422 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2423 continue;
2424
2425 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2426
adae20cb
JH		 2427 list_del_rcu(&k->list);
2428 kfree_rcu(k, rcu);
a7ec7338
JH		 2429 }
2430}
2431
55e76b38
JH		 2432bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2433{
2434 struct smp_ltk *k;
4ba9faf3 2435 struct smp_irk *irk;
55e76b38
JH		 2436 u8 addr_type;
2437
2438 if (type == BDADDR_BREDR) {
2439 if (hci_find_link_key(hdev, bdaddr))
2440 return true;
2441 return false;
2442 }
2443
2444 /* Convert to HCI addr type which struct smp_ltk uses */
2445 if (type == BDADDR_LE_PUBLIC)
2446 addr_type = ADDR_LE_DEV_PUBLIC;
2447 else
2448 addr_type = ADDR_LE_DEV_RANDOM;
2449
4ba9faf3
JH		 2450 irk = hci_get_irk(hdev, bdaddr, addr_type);
2451 if (irk) {
2452 bdaddr = &irk->bdaddr;
2453 addr_type = irk->addr_type;
2454 }
2455
55e76b38
JH		 2456 rcu_read_lock();
2457 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
87c8b28d
JH		 2458 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2459 rcu_read_unlock();
55e76b38 2460 return true;
87c8b28d 2461 }
55e76b38
JH		 2462 }
2463 rcu_read_unlock();
2464
2465 return false;
2466}
2467
6bd32326 2468/* HCI command timer function */
65cc2b49 2469static void hci_cmd_timeout(struct work_struct *work)
6bd32326 2470{
65cc2b49
MH		 2471 struct hci_dev *hdev = container_of(work, struct hci_dev,
2472 cmd_timer.work);
6bd32326 2473
bda4f23a
AE		 2474 if (hdev->sent_cmd) {
2475 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2476 u16 opcode = __le16_to_cpu(sent->opcode);
2477
2478 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2479 } else {
2480 BT_ERR("%s command tx timeout", hdev->name);
2481 }
2482
6bd32326 2483 atomic_set(&hdev->cmd_cnt, 1);
c347b765 2484 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 2485}
2486
2763eda6 2487struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
6928a924 2488 bdaddr_t *bdaddr, u8 bdaddr_type)
2763eda6
SJ		 2489{
2490 struct oob_data *data;
2491
6928a924
JH		 2492 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2493 if (bacmp(bdaddr, &data->bdaddr) != 0)
2494 continue;
2495 if (data->bdaddr_type != bdaddr_type)
2496 continue;
2497 return data;
2498 }
2763eda6
SJ		 2499
2500 return NULL;
2501}
2502
6928a924
JH		 2503int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2504 u8 bdaddr_type)
2763eda6
SJ		 2505{
2506 struct oob_data *data;
2507
6928a924 2508 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2763eda6
SJ		 2509 if (!data)
2510 return -ENOENT;
2511
6928a924 2512 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2763eda6
SJ		 2513
2514 list_del(&data->list);
2515 kfree(data);
2516
2517 return 0;
2518}
2519
35f7498a 2520void hci_remote_oob_data_clear(struct hci_dev *hdev)
2763eda6
SJ		 2521{
2522 struct oob_data *data, *n;
2523
2524 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2525 list_del(&data->list);
2526 kfree(data);
2527 }
2763eda6
SJ		 2528}
2529
0798872e 2530int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
6928a924 2531 u8 bdaddr_type, u8 *hash192, u8 *rand192,
81328d5c 2532 u8 *hash256, u8 *rand256)
2763eda6
SJ		 2533{
2534 struct oob_data *data;
2535
6928a924 2536 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2763eda6 2537 if (!data) {
0a14ab41 2538 data = kmalloc(sizeof(*data), GFP_KERNEL);
2763eda6
SJ		 2539 if (!data)
2540 return -ENOMEM;
2541
2542 bacpy(&data->bdaddr, bdaddr);
6928a924 2543 data->bdaddr_type = bdaddr_type;
2763eda6
SJ		 2544 list_add(&data->list, &hdev->remote_oob_data);
2545 }
2546
81328d5c
JH		 2547 if (hash192 && rand192) {
2548 memcpy(data->hash192, hash192, sizeof(data->hash192));
2549 memcpy(data->rand192, rand192, sizeof(data->rand192));
f7697b16
MH		 2550 if (hash256 && rand256)
2551 data->present = 0x03;
81328d5c
JH		 2552 } else {
2553 memset(data->hash192, 0, sizeof(data->hash192));
2554 memset(data->rand192, 0, sizeof(data->rand192));
f7697b16
MH		 2555 if (hash256 && rand256)
2556 data->present = 0x02;
2557 else
2558 data->present = 0x00;
0798872e
MH		 2559 }
2560
81328d5c
JH		 2561 if (hash256 && rand256) {
2562 memcpy(data->hash256, hash256, sizeof(data->hash256));
2563 memcpy(data->rand256, rand256, sizeof(data->rand256));
2564 } else {
2565 memset(data->hash256, 0, sizeof(data->hash256));
2566 memset(data->rand256, 0, sizeof(data->rand256));
f7697b16
MH		 2567 if (hash192 && rand192)
2568 data->present = 0x01;
81328d5c 2569 }
0798872e 2570
6ed93dc6 2571 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2763eda6
SJ		 2572
2573 return 0;
2574}
2575
d2609b34
FG		 2576/* This function requires the caller holds hdev->lock */
2577struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2578{
2579 struct adv_info *adv_instance;
2580
2581 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2582 if (adv_instance->instance == instance)
2583 return adv_instance;
2584 }
2585
2586 return NULL;
2587}
2588
2589/* This function requires the caller holds hdev->lock */
74b93e9f
PK		 2590struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2591{
d2609b34
FG		 2592 struct adv_info *cur_instance;
2593
2594 cur_instance = hci_find_adv_instance(hdev, instance);
2595 if (!cur_instance)
2596 return NULL;
2597
2598 if (cur_instance == list_last_entry(&hdev->adv_instances,
2599 struct adv_info, list))
2600 return list_first_entry(&hdev->adv_instances,
2601 struct adv_info, list);
2602 else
2603 return list_next_entry(cur_instance, list);
2604}
2605
2606/* This function requires the caller holds hdev->lock */
2607int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2608{
2609 struct adv_info *adv_instance;
2610
2611 adv_instance = hci_find_adv_instance(hdev, instance);
2612 if (!adv_instance)
2613 return -ENOENT;
2614
2615 BT_DBG("%s removing %dMR", hdev->name, instance);
2616
cab054ab
JH		 2617 if (hdev->cur_adv_instance == instance) {
2618 if (hdev->adv_instance_timeout) {
2619 cancel_delayed_work(&hdev->adv_instance_expire);
2620 hdev->adv_instance_timeout = 0;
2621 }
2622 hdev->cur_adv_instance = 0x00;
5d900e46
FG		 2623 }
2624
d2609b34
FG		 2625 list_del(&adv_instance->list);
2626 kfree(adv_instance);
2627
2628 hdev->adv_instance_cnt--;
2629
2630 return 0;
2631}
2632
2633/* This function requires the caller holds hdev->lock */
2634void hci_adv_instances_clear(struct hci_dev *hdev)
2635{
2636 struct adv_info *adv_instance, *n;
2637
5d900e46
FG		 2638 if (hdev->adv_instance_timeout) {
2639 cancel_delayed_work(&hdev->adv_instance_expire);
2640 hdev->adv_instance_timeout = 0;
2641 }
2642
d2609b34
FG		 2643 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2644 list_del(&adv_instance->list);
2645 kfree(adv_instance);
2646 }
2647
2648 hdev->adv_instance_cnt = 0;
cab054ab 2649 hdev->cur_adv_instance = 0x00;
d2609b34
FG		 2650}
2651
2652/* This function requires the caller holds hdev->lock */
2653int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2654 u16 adv_data_len, u8 *adv_data,
2655 u16 scan_rsp_len, u8 *scan_rsp_data,
2656 u16 timeout, u16 duration)
2657{
2658 struct adv_info *adv_instance;
2659
2660 adv_instance = hci_find_adv_instance(hdev, instance);
2661 if (adv_instance) {
2662 memset(adv_instance->adv_data, 0,
2663 sizeof(adv_instance->adv_data));
2664 memset(adv_instance->scan_rsp_data, 0,
2665 sizeof(adv_instance->scan_rsp_data));
2666 } else {
2667 if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
2668 instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
2669 return -EOVERFLOW;
2670
39ecfad6 2671 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
d2609b34
FG		 2672 if (!adv_instance)
2673 return -ENOMEM;
2674
fffd38bc 2675 adv_instance->pending = true;
d2609b34
FG		 2676 adv_instance->instance = instance;
2677 list_add(&adv_instance->list, &hdev->adv_instances);
2678 hdev->adv_instance_cnt++;
2679 }
2680
2681 adv_instance->flags = flags;
2682 adv_instance->adv_data_len = adv_data_len;
2683 adv_instance->scan_rsp_len = scan_rsp_len;
2684
2685 if (adv_data_len)
2686 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
2687
2688 if (scan_rsp_len)
2689 memcpy(adv_instance->scan_rsp_data,
2690 scan_rsp_data, scan_rsp_len);
2691
2692 adv_instance->timeout = timeout;
5d900e46 2693 adv_instance->remaining_time = timeout;
d2609b34
FG		 2694
2695 if (duration == 0)
2696 adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
2697 else
2698 adv_instance->duration = duration;
2699
2700 BT_DBG("%s for %dMR", hdev->name, instance);
2701
2702 return 0;
2703}
2704
dcc36c16 2705struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
b9ee0a78 2706 bdaddr_t *bdaddr, u8 type)
b2a66aad 2707{
8035ded4 2708 struct bdaddr_list *b;
b2a66aad 2709
dcc36c16 2710 list_for_each_entry(b, bdaddr_list, list) {
b9ee0a78 2711 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
b2a66aad 2712 return b;
b9ee0a78 2713 }
b2a66aad
AJ		 2714
2715 return NULL;
2716}
2717
dcc36c16 2718void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
b2a66aad 2719{
7eb7404f 2720 struct bdaddr_list *b, *n;
b2a66aad 2721
7eb7404f
GT		 2722 list_for_each_entry_safe(b, n, bdaddr_list, list) {
2723 list_del(&b->list);
b2a66aad
AJ		 2724 kfree(b);
2725 }
b2a66aad
AJ		 2726}
2727
dcc36c16 2728int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2729{
2730 struct bdaddr_list *entry;
b2a66aad 2731
b9ee0a78 2732 if (!bacmp(bdaddr, BDADDR_ANY))
b2a66aad
AJ		 2733 return -EBADF;
2734
dcc36c16 2735 if (hci_bdaddr_list_lookup(list, bdaddr, type))
5e762444 2736 return -EEXIST;
b2a66aad 2737
27f70f3e 2738 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
5e762444
AJ		 2739 if (!entry)
2740 return -ENOMEM;
b2a66aad
AJ		 2741
2742 bacpy(&entry->bdaddr, bdaddr);
b9ee0a78 2743 entry->bdaddr_type = type;
b2a66aad 2744
dcc36c16 2745 list_add(&entry->list, list);
b2a66aad 2746
2a8357f2 2747 return 0;
b2a66aad
AJ		 2748}
2749
dcc36c16 2750int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 2751{
2752 struct bdaddr_list *entry;
b2a66aad 2753
35f7498a 2754 if (!bacmp(bdaddr, BDADDR_ANY)) {
dcc36c16 2755 hci_bdaddr_list_clear(list);
35f7498a
JH		 2756 return 0;
2757 }
b2a66aad 2758
dcc36c16 2759 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
d2ab0ac1
MH		 2760 if (!entry)
2761 return -ENOENT;
2762
2763 list_del(&entry->list);
2764 kfree(entry);
2765
2766 return 0;
2767}
2768
15819a70
AG		 2769/* This function requires the caller holds hdev->lock */
2770struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2771 bdaddr_t *addr, u8 addr_type)
2772{
2773 struct hci_conn_params *params;
2774
2775 list_for_each_entry(params, &hdev->le_conn_params, list) {
2776 if (bacmp(&params->addr, addr) == 0 &&
2777 params->addr_type == addr_type) {
2778 return params;
2779 }
2780 }
2781
2782 return NULL;
2783}
2784
4b10966f 2785/* This function requires the caller holds hdev->lock */
501f8827
JH		 2786struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2787 bdaddr_t *addr, u8 addr_type)
a9b0a04c 2788{
912b42ef 2789 struct hci_conn_params *param;
a9b0a04c 2790
501f8827 2791 list_for_each_entry(param, list, action) {
912b42ef
JH		 2792 if (bacmp(&param->addr, addr) == 0 &&
2793 param->addr_type == addr_type)
2794 return param;
4b10966f
MH		 2795 }
2796
2797 return NULL;
a9b0a04c
AG		 2798}
2799
15819a70 2800/* This function requires the caller holds hdev->lock */
51d167c0
MH		 2801struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2802 bdaddr_t *addr, u8 addr_type)
15819a70
AG		 2803{
2804 struct hci_conn_params *params;
2805
2806 params = hci_conn_params_lookup(hdev, addr, addr_type);
cef952ce 2807 if (params)
51d167c0 2808 return params;
15819a70
AG		 2809
2810 params = kzalloc(sizeof(*params), GFP_KERNEL);
2811 if (!params) {
2812 BT_ERR("Out of memory");
51d167c0 2813 return NULL;
15819a70
AG		 2814 }
2815
2816 bacpy(&params->addr, addr);
2817 params->addr_type = addr_type;
cef952ce
AG		 2818
2819 list_add(&params->list, &hdev->le_conn_params);
93450c75 2820 INIT_LIST_HEAD(&params->action);
cef952ce 2821
bf5b3c8b
MH		 2822 params->conn_min_interval = hdev->le_conn_min_interval;
2823 params->conn_max_interval = hdev->le_conn_max_interval;
2824 params->conn_latency = hdev->le_conn_latency;
2825 params->supervision_timeout = hdev->le_supv_timeout;
2826 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2827
2828 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2829
51d167c0 2830 return params;
bf5b3c8b
MH		 2831}
2832
f6c63249 2833static void hci_conn_params_free(struct hci_conn_params *params)
15819a70 2834{
f8aaf9b6 2835 if (params->conn) {
f161dd41 2836 hci_conn_drop(params->conn);
f8aaf9b6
JH		 2837 hci_conn_put(params->conn);
2838 }
f161dd41 2839
95305baa 2840 list_del(&params->action);
15819a70
AG		 2841 list_del(&params->list);
2842 kfree(params);
f6c63249
JH		 2843}
2844
2845/* This function requires the caller holds hdev->lock */
2846void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2847{
2848 struct hci_conn_params *params;
2849
2850 params = hci_conn_params_lookup(hdev, addr, addr_type);
2851 if (!params)
2852 return;
2853
2854 hci_conn_params_free(params);
15819a70 2855
95305baa
JH		 2856 hci_update_background_scan(hdev);
2857
15819a70
AG		 2858 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2859}
2860
2861/* This function requires the caller holds hdev->lock */
55af49a8 2862void hci_conn_params_clear_disabled(struct hci_dev *hdev)
15819a70
AG		 2863{
2864 struct hci_conn_params *params, *tmp;
2865
2866 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
55af49a8
JH		 2867 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2868 continue;
f75113a2
JP		 2869
2870 /* If trying to estabilish one time connection to disabled
2871 * device, leave the params, but mark them as just once.
2872 */
2873 if (params->explicit_connect) {
2874 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2875 continue;
2876 }
2877
15819a70
AG		 2878 list_del(&params->list);
2879 kfree(params);
2880 }
2881
55af49a8 2882 BT_DBG("All LE disabled connection parameters were removed");
77a77a30
AG		 2883}
2884
2885/* This function requires the caller holds hdev->lock */
030e7f81 2886static void hci_conn_params_clear_all(struct hci_dev *hdev)
77a77a30 2887{
15819a70 2888 struct hci_conn_params *params, *tmp;
77a77a30 2889
f6c63249
JH		 2890 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2891 hci_conn_params_free(params);
77a77a30 2892
15819a70 2893 BT_DBG("All LE connection parameters were removed");
77a77a30
AG		 2894}
2895
a1f4c318
JH		 2896/* Copy the Identity Address of the controller.
2897 *
2898 * If the controller has a public BD_ADDR, then by default use that one.
2899 * If this is a LE only controller without a public address, default to
2900 * the static random address.
2901 *
2902 * For debugging purposes it is possible to force controllers with a
2903 * public address to use the static random address instead.
50b5b952
MH		 2904 *
2905 * In case BR/EDR has been disabled on a dual-mode controller and
2906 * userspace has configured a static address, then that address
2907 * becomes the identity address instead of the public BR/EDR address.
a1f4c318
JH		 2908 */
2909void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2910 u8 *bdaddr_type)
2911{
b7cb93e5 2912 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
50b5b952 2913 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
d7a5a11d 2914 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
50b5b952 2915 bacmp(&hdev->static_addr, BDADDR_ANY))) {
a1f4c318
JH		 2916 bacpy(bdaddr, &hdev->static_addr);
2917 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2918 } else {
2919 bacpy(bdaddr, &hdev->bdaddr);
2920 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2921 }
2922}
2923
9be0dab7
DH		 2924/* Alloc HCI device */
2925struct hci_dev *hci_alloc_dev(void)
2926{
2927 struct hci_dev *hdev;
2928
27f70f3e 2929 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
9be0dab7
DH		 2930 if (!hdev)
2931 return NULL;
2932
b1b813d4
DH		 2933 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2934 hdev->esco_type = (ESCO_HV1);
2935 hdev->link_mode = (HCI_LM_ACCEPT);
b4cb9fb2
MH		 2936 hdev->num_iac = 0x01; /* One IAC support is mandatory */
2937 hdev->io_capability = 0x03; /* No Input No Output */
96c2103a 2938 hdev->manufacturer = 0xffff; /* Default to internal use */
bbaf444a
JH		 2939 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2940 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
d2609b34
FG		 2941 hdev->adv_instance_cnt = 0;
2942 hdev->cur_adv_instance = 0x00;
5d900e46 2943 hdev->adv_instance_timeout = 0;
b1b813d4 2944
b1b813d4
DH		 2945 hdev->sniff_max_interval = 800;
2946 hdev->sniff_min_interval = 80;
2947
3f959d46 2948 hdev->le_adv_channel_map = 0x07;
628531c9
GL		 2949 hdev->le_adv_min_interval = 0x0800;
2950 hdev->le_adv_max_interval = 0x0800;
bef64738
MH		 2951 hdev->le_scan_interval = 0x0060;
2952 hdev->le_scan_window = 0x0030;
4e70c7e7
MH		 2953 hdev->le_conn_min_interval = 0x0028;
2954 hdev->le_conn_max_interval = 0x0038;
04fb7d90
MH		 2955 hdev->le_conn_latency = 0x0000;
2956 hdev->le_supv_timeout = 0x002a;
a8e1bfaa
MH		 2957 hdev->le_def_tx_len = 0x001b;
2958 hdev->le_def_tx_time = 0x0148;
2959 hdev->le_max_tx_len = 0x001b;
2960 hdev->le_max_tx_time = 0x0148;
2961 hdev->le_max_rx_len = 0x001b;
2962 hdev->le_max_rx_time = 0x0148;
bef64738 2963
d6bfd59c 2964 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
b9a7a61e 2965 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
31ad1691
AK		 2966 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2967 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
d6bfd59c 2968
b1b813d4
DH		 2969 mutex_init(&hdev->lock);
2970 mutex_init(&hdev->req_lock);
2971
2972 INIT_LIST_HEAD(&hdev->mgmt_pending);
2973 INIT_LIST_HEAD(&hdev->blacklist);
6659358e 2974 INIT_LIST_HEAD(&hdev->whitelist);
b1b813d4
DH		 2975 INIT_LIST_HEAD(&hdev->uuids);
2976 INIT_LIST_HEAD(&hdev->link_keys);
2977 INIT_LIST_HEAD(&hdev->long_term_keys);
970c4e46 2978 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
b1b813d4 2979 INIT_LIST_HEAD(&hdev->remote_oob_data);
d2ab0ac1 2980 INIT_LIST_HEAD(&hdev->le_white_list);
15819a70 2981 INIT_LIST_HEAD(&hdev->le_conn_params);
77a77a30 2982 INIT_LIST_HEAD(&hdev->pend_le_conns);
66f8455a 2983 INIT_LIST_HEAD(&hdev->pend_le_reports);
6b536b5e 2984 INIT_LIST_HEAD(&hdev->conn_hash.list);
d2609b34 2985 INIT_LIST_HEAD(&hdev->adv_instances);
b1b813d4
DH		 2986
2987 INIT_WORK(&hdev->rx_work, hci_rx_work);
2988 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2989 INIT_WORK(&hdev->tx_work, hci_tx_work);
2990 INIT_WORK(&hdev->power_on, hci_power_on);
c7741d16 2991 INIT_WORK(&hdev->error_reset, hci_error_reset);
b1b813d4 2992
b1b813d4 2993 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
b1b813d4 2994
b1b813d4
DH		 2995 skb_queue_head_init(&hdev->rx_q);
2996 skb_queue_head_init(&hdev->cmd_q);
2997 skb_queue_head_init(&hdev->raw_q);
2998
2999 init_waitqueue_head(&hdev->req_wait_q);
3000
65cc2b49 3001 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
b1b813d4 3002
5fc16cc4
JH		 3003 hci_request_setup(hdev);
3004
b1b813d4
DH		 3005 hci_init_sysfs(hdev);
3006 discovery_init(hdev);
9be0dab7
DH		 3007
3008 return hdev;
3009}
3010EXPORT_SYMBOL(hci_alloc_dev);
3011
3012/* Free HCI device */
3013void hci_free_dev(struct hci_dev *hdev)
3014{
9be0dab7
DH		 3015 /* will free via device release */
3016 put_device(&hdev->dev);
3017}
3018EXPORT_SYMBOL(hci_free_dev);
3019
1da177e4
LT		 3020/* Register HCI device */
3021int hci_register_dev(struct hci_dev *hdev)
3022{
b1b813d4 3023 int id, error;
1da177e4 3024
74292d5a 3025 if (!hdev->open || !hdev->close || !hdev->send)
1da177e4
LT		 3026 return -EINVAL;
3027
08add513
MM		 3028 /* Do not allow HCI_AMP devices to register at index 0,
3029 * so the index can be used as the AMP controller ID.
3030 */
3df92b31 3031 switch (hdev->dev_type) {
ca8bee5d 3032 case HCI_PRIMARY:
3df92b31
SL		 3033 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3034 break;
3035 case HCI_AMP:
3036 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3037 break;
3038 default:
3039 return -EINVAL;
1da177e4 3040 }
8e87d142 3041
3df92b31
SL		 3042 if (id < 0)
3043 return id;
3044
1da177e4
LT		 3045 sprintf(hdev->name, "hci%d", id);
3046 hdev->id = id;
2d8b3a11
AE		 3047
3048 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3049
d8537548
KC		 3050 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3051 WQ_MEM_RECLAIM, 1, hdev->name);
33ca954d
DH		 3052 if (!hdev->workqueue) {
3053 error = -ENOMEM;
3054 goto err;
3055 }
f48fd9c8 3056
d8537548
KC		 3057 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3058 WQ_MEM_RECLAIM, 1, hdev->name);
6ead1bbc
JH		 3059 if (!hdev->req_workqueue) {
3060 destroy_workqueue(hdev->workqueue);
3061 error = -ENOMEM;
3062 goto err;
3063 }
3064
0153e2ec
MH		 3065 if (!IS_ERR_OR_NULL(bt_debugfs))
3066 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3067
bdc3e0f1
MH		 3068 dev_set_name(&hdev->dev, "%s", hdev->name);
3069
3070 error = device_add(&hdev->dev);
33ca954d 3071 if (error < 0)
54506918 3072 goto err_wqueue;
1da177e4 3073
6d5d2ee6
HK		 3074 hci_leds_init(hdev);
3075
611b30f7 3076 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
a8c5fb1a
GP		 3077 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3078 hdev);
611b30f7
MH		 3079 if (hdev->rfkill) {
3080 if (rfkill_register(hdev->rfkill) < 0) {
3081 rfkill_destroy(hdev->rfkill);
3082 hdev->rfkill = NULL;
3083 }
3084 }
3085
5e130367 3086 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
a1536da2 3087 hci_dev_set_flag(hdev, HCI_RFKILLED);
5e130367 3088
a1536da2
MH		 3089 hci_dev_set_flag(hdev, HCI_SETUP);
3090 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
ce2be9ac 3091
ca8bee5d 3092 if (hdev->dev_type == HCI_PRIMARY) {
56f87901
JH		 3093 /* Assume BR/EDR support until proven otherwise (such as
3094 * through reading supported features during init.
3095 */
a1536da2 3096 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
56f87901 3097 }
ce2be9ac 3098
fcee3377
GP		 3099 write_lock(&hci_dev_list_lock);
3100 list_add(&hdev->list, &hci_dev_list);
3101 write_unlock(&hci_dev_list_lock);
3102
4a964404
MH		 3103 /* Devices that are marked for raw-only usage are unconfigured
3104 * and should not be included in normal operation.
fee746b0
MH		 3105 */
3106 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
a1536da2 3107 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
fee746b0 3108
05fcd4c4 3109 hci_sock_dev_event(hdev, HCI_DEV_REG);
dc946bd8 3110 hci_dev_hold(hdev);
1da177e4 3111
19202573 3112 queue_work(hdev->req_workqueue, &hdev->power_on);
fbe96d6f 3113
1da177e4 3114 return id;
f48fd9c8 3115
33ca954d
DH		 3116err_wqueue:
3117 destroy_workqueue(hdev->workqueue);
6ead1bbc 3118 destroy_workqueue(hdev->req_workqueue);
33ca954d 3119err:
3df92b31 3120 ida_simple_remove(&hci_index_ida, hdev->id);
f48fd9c8 3121
33ca954d 3122 return error;
1da177e4
LT		 3123}
3124EXPORT_SYMBOL(hci_register_dev);
3125
3126/* Unregister HCI device */
59735631 3127void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 3128{
2d7cc19e 3129 int id;
ef222013 3130
c13854ce 3131 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 3132
a1536da2 3133 hci_dev_set_flag(hdev, HCI_UNREGISTER);
94324962 3134
3df92b31
SL		 3135 id = hdev->id;
3136
f20d09d5 3137 write_lock(&hci_dev_list_lock);
1da177e4 3138 list_del(&hdev->list);
f20d09d5 3139 write_unlock(&hci_dev_list_lock);
1da177e4 3140
b9b5ef18
GP		 3141 cancel_work_sync(&hdev->power_on);
3142
bf389cab
JS		 3143 hci_dev_do_close(hdev);
3144
ab81cbf9 3145 if (!test_bit(HCI_INIT, &hdev->flags) &&
d7a5a11d
MH		 3146 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3147 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
09fd0de5 3148 hci_dev_lock(hdev);
744cf19e 3149 mgmt_index_removed(hdev);
09fd0de5 3150 hci_dev_unlock(hdev);
56e5cb86 3151 }
ab81cbf9 3152
2e58ef3e
JH		 3153 /* mgmt_index_removed should take care of emptying the
3154 * pending list */
3155 BUG_ON(!list_empty(&hdev->mgmt_pending));
3156
05fcd4c4 3157 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
1da177e4 3158
611b30f7
MH		 3159 if (hdev->rfkill) {
3160 rfkill_unregister(hdev->rfkill);
3161 rfkill_destroy(hdev->rfkill);
3162 }
3163
bdc3e0f1 3164 device_del(&hdev->dev);
147e2d59 3165
0153e2ec 3166 debugfs_remove_recursive(hdev->debugfs);
5177a838
MH		 3167 kfree_const(hdev->hw_info);
3168 kfree_const(hdev->fw_info);
0153e2ec 3169
f48fd9c8 3170 destroy_workqueue(hdev->workqueue);
6ead1bbc 3171 destroy_workqueue(hdev->req_workqueue);
f48fd9c8 3172
09fd0de5 3173 hci_dev_lock(hdev);
dcc36c16 3174 hci_bdaddr_list_clear(&hdev->blacklist);
6659358e 3175 hci_bdaddr_list_clear(&hdev->whitelist);
2aeb9a1a 3176 hci_uuids_clear(hdev);
55ed8ca1 3177 hci_link_keys_clear(hdev);
b899efaf 3178 hci_smp_ltks_clear(hdev);
970c4e46 3179 hci_smp_irks_clear(hdev);
2763eda6 3180 hci_remote_oob_data_clear(hdev);
d2609b34 3181 hci_adv_instances_clear(hdev);
dcc36c16 3182 hci_bdaddr_list_clear(&hdev->le_white_list);
373110c5 3183 hci_conn_params_clear_all(hdev);
22078800 3184 hci_discovery_filter_clear(hdev);
09fd0de5 3185 hci_dev_unlock(hdev);
e2e0cacb 3186
dc946bd8 3187 hci_dev_put(hdev);
3df92b31
SL		 3188
3189 ida_simple_remove(&hci_index_ida, id);
1da177e4
LT		 3190}
3191EXPORT_SYMBOL(hci_unregister_dev);
3192
3193/* Suspend HCI device */
3194int hci_suspend_dev(struct hci_dev *hdev)
3195{
05fcd4c4 3196 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
1da177e4
LT		 3197 return 0;
3198}
3199EXPORT_SYMBOL(hci_suspend_dev);
3200
3201/* Resume HCI device */
3202int hci_resume_dev(struct hci_dev *hdev)
3203{
05fcd4c4 3204 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
1da177e4
LT		 3205 return 0;
3206}
3207EXPORT_SYMBOL(hci_resume_dev);
3208
75e0569f
MH		 3209/* Reset HCI device */
3210int hci_reset_dev(struct hci_dev *hdev)
3211{
3212 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3213 struct sk_buff *skb;
3214
3215 skb = bt_skb_alloc(3, GFP_ATOMIC);
3216 if (!skb)
3217 return -ENOMEM;
3218
d79f34e3 3219 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
75e0569f
MH		 3220 memcpy(skb_put(skb, 3), hw_err, 3);
3221
3222 /* Send Hardware Error to upper stack */
3223 return hci_recv_frame(hdev, skb);
3224}
3225EXPORT_SYMBOL(hci_reset_dev);
3226
76bca880 3227/* Receive frame from HCI drivers */
e1a26170 3228int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
76bca880 3229{
76bca880 3230 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
a8c5fb1a 3231 && !test_bit(HCI_INIT, &hdev->flags))) {
76bca880
MH		 3232 kfree_skb(skb);
3233 return -ENXIO;
3234 }
3235
d79f34e3
MH		 3236 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3237 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3238 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT) {
fe806dce
MH		 3239 kfree_skb(skb);
3240 return -EINVAL;
3241 }
3242
d82603c6 3243 /* Incoming skb */
76bca880
MH		 3244 bt_cb(skb)->incoming = 1;
3245
3246 /* Time stamp */
3247 __net_timestamp(skb);
3248
76bca880 3249 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 3250 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 3251
76bca880
MH		 3252 return 0;
3253}
3254EXPORT_SYMBOL(hci_recv_frame);
3255
e875ff84
MH		 3256/* Receive diagnostic message from HCI drivers */
3257int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3258{
581d6fd6 3259 /* Mark as diagnostic packet */
d79f34e3 3260 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
581d6fd6 3261
e875ff84
MH		 3262 /* Time stamp */
3263 __net_timestamp(skb);
3264
581d6fd6
MH		 3265 skb_queue_tail(&hdev->rx_q, skb);
3266 queue_work(hdev->workqueue, &hdev->rx_work);
e875ff84 3267
e875ff84
MH		 3268 return 0;
3269}
3270EXPORT_SYMBOL(hci_recv_diag);
3271
5177a838
MH		 3272void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3273{
3274 va_list vargs;
3275
3276 va_start(vargs, fmt);
3277 kfree_const(hdev->hw_info);
3278 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3279 va_end(vargs);
3280}
3281EXPORT_SYMBOL(hci_set_hw_info);
3282
3283void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3284{
3285 va_list vargs;
3286
3287 va_start(vargs, fmt);
3288 kfree_const(hdev->fw_info);
3289 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3290 va_end(vargs);
3291}
3292EXPORT_SYMBOL(hci_set_fw_info);
3293
1da177e4
LT		 3294/* ---- Interface to upper protocols ---- */
3295
1da177e4
LT		 3296int hci_register_cb(struct hci_cb *cb)
3297{
3298 BT_DBG("%p name %s", cb, cb->name);
3299
fba7ecf0 3300 mutex_lock(&hci_cb_list_lock);
00629e0f 3301 list_add_tail(&cb->list, &hci_cb_list);
fba7ecf0 3302 mutex_unlock(&hci_cb_list_lock);
1da177e4
LT		 3303
3304 return 0;
3305}
3306EXPORT_SYMBOL(hci_register_cb);
3307
3308int hci_unregister_cb(struct hci_cb *cb)
3309{
3310 BT_DBG("%p name %s", cb, cb->name);
3311
fba7ecf0 3312 mutex_lock(&hci_cb_list_lock);
1da177e4 3313 list_del(&cb->list);
fba7ecf0 3314 mutex_unlock(&hci_cb_list_lock);
1da177e4
LT		 3315
3316 return 0;
3317}
3318EXPORT_SYMBOL(hci_unregister_cb);
3319
51086991 3320static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4 3321{
cdc52faa
MH		 3322 int err;
3323
d79f34e3
MH		 3324 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3325 skb->len);
1da177e4 3326
cd82e61c
MH		 3327 /* Time stamp */
3328 __net_timestamp(skb);
1da177e4 3329
cd82e61c
MH		 3330 /* Send copy to monitor */
3331 hci_send_to_monitor(hdev, skb);
3332
3333 if (atomic_read(&hdev->promisc)) {
3334 /* Send copy to the sockets */
470fe1b5 3335 hci_send_to_sock(hdev, skb);
1da177e4
LT		 3336 }
3337
3338 /* Get rid of skb owner, prior to sending to the driver. */
3339 skb_orphan(skb);
3340
73d0d3c8
MH		 3341 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3342 kfree_skb(skb);
3343 return;
3344 }
3345
cdc52faa
MH		 3346 err = hdev->send(hdev, skb);
3347 if (err < 0) {
3348 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3349 kfree_skb(skb);
3350 }
1da177e4
LT		 3351}
3352
1ca3a9d0 3353/* Send HCI command */
07dc93dd
JH		 3354int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3355 const void *param)
1ca3a9d0
JH		 3356{
3357 struct sk_buff *skb;
3358
3359 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3360
3361 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3362 if (!skb) {
3363 BT_ERR("%s no memory for command", hdev->name);
3364 return -ENOMEM;
3365 }
3366
49c922bb 3367 /* Stand-alone HCI commands must be flagged as
11714b3d
JH		 3368 * single-command requests.
3369 */
44d27137 3370 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
11714b3d 3371
1da177e4 3372 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 3373 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 3374
3375 return 0;
3376}
1da177e4
LT		 3377
3378/* Get data from the previously sent command */
a9de9248 3379void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 3380{
3381 struct hci_command_hdr *hdr;
3382
3383 if (!hdev->sent_cmd)
3384 return NULL;
3385
3386 hdr = (void *) hdev->sent_cmd->data;
3387
a9de9248 3388 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 3389 return NULL;
3390
f0e09510 3391 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
1da177e4
LT		 3392
3393 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3394}
3395
fbef168f
LP		 3396/* Send HCI command and wait for command commplete event */
3397struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
3398 const void *param, u32 timeout)
3399{
3400 struct sk_buff *skb;
3401
3402 if (!test_bit(HCI_UP, &hdev->flags))
3403 return ERR_PTR(-ENETDOWN);
3404
3405 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
3406
b504430c 3407 hci_req_sync_lock(hdev);
fbef168f 3408 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
b504430c 3409 hci_req_sync_unlock(hdev);
fbef168f
LP		 3410
3411 return skb;
3412}
3413EXPORT_SYMBOL(hci_cmd_sync);
3414
1da177e4
LT		 3415/* Send ACL data */
3416static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3417{
3418 struct hci_acl_hdr *hdr;
3419 int len = skb->len;
3420
badff6d0
ACM		 3421 skb_push(skb, HCI_ACL_HDR_SIZE);
3422 skb_reset_transport_header(skb);
9c70220b 3423 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 3424 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3425 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 3426}
3427
ee22be7e 3428static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
a8c5fb1a 3429 struct sk_buff *skb, __u16 flags)
1da177e4 3430{
ee22be7e 3431 struct hci_conn *conn = chan->conn;
1da177e4
LT		 3432 struct hci_dev *hdev = conn->hdev;
3433 struct sk_buff *list;
3434
087bfd99
GP		 3435 skb->len = skb_headlen(skb);
3436 skb->data_len = 0;
3437
d79f34e3 3438 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
204a6e54
AE		 3439
3440 switch (hdev->dev_type) {
ca8bee5d 3441 case HCI_PRIMARY:
204a6e54
AE		 3442 hci_add_acl_hdr(skb, conn->handle, flags);
3443 break;
3444 case HCI_AMP:
3445 hci_add_acl_hdr(skb, chan->handle, flags);
3446 break;
3447 default:
3448 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3449 return;
3450 }
087bfd99 3451
70f23020
AE		 3452 list = skb_shinfo(skb)->frag_list;
3453 if (!list) {
1da177e4
LT		 3454 /* Non fragmented */
3455 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3456
73d80deb 3457 skb_queue_tail(queue, skb);
1da177e4
LT		 3458 } else {
3459 /* Fragmented */
3460 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3461
3462 skb_shinfo(skb)->frag_list = NULL;
3463
9cfd5a23
JR		 3464 /* Queue all fragments atomically. We need to use spin_lock_bh
3465 * here because of 6LoWPAN links, as there this function is
3466 * called from softirq and using normal spin lock could cause
3467 * deadlocks.
3468 */
3469 spin_lock_bh(&queue->lock);
1da177e4 3470
73d80deb 3471 __skb_queue_tail(queue, skb);
e702112f
AE		 3472
3473 flags &= ~ACL_START;
3474 flags |= ACL_CONT;
1da177e4
LT		 3475 do {
3476 skb = list; list = list->next;
8e87d142 3477
d79f34e3 3478 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
e702112f 3479 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 3480
3481 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3482
73d80deb 3483 __skb_queue_tail(queue, skb);
1da177e4
LT		 3484 } while (list);
3485
9cfd5a23 3486 spin_unlock_bh(&queue->lock);
1da177e4 3487 }
73d80deb
LAD		 3488}
3489
3490void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3491{
ee22be7e 3492 struct hci_dev *hdev = chan->conn->hdev;
73d80deb 3493
f0e09510 3494 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
73d80deb 3495
ee22be7e 3496 hci_queue_acl(chan, &chan->data_q, skb, flags);
1da177e4 3497
3eff45ea 3498 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 3499}
1da177e4
LT		 3500
3501/* Send SCO data */
0d861d8b 3502void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 3503{
3504 struct hci_dev *hdev = conn->hdev;
3505 struct hci_sco_hdr hdr;
3506
3507 BT_DBG("%s len %d", hdev->name, skb->len);
3508
aca3192c 3509 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 3510 hdr.dlen = skb->len;
3511
badff6d0
ACM		 3512 skb_push(skb, HCI_SCO_HDR_SIZE);
3513 skb_reset_transport_header(skb);
9c70220b 3514 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4 3515
d79f34e3 3516 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
c78ae283 3517
1da177e4 3518 skb_queue_tail(&conn->data_q, skb);
3eff45ea 3519 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4 3520}
1da177e4
LT		 3521
3522/* ---- HCI TX task (outgoing data) ---- */
3523
3524/* HCI Connection scheduler */
6039aa73
GP		 3525static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3526 int *quote)
1da177e4
LT		 3527{
3528 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3529 struct hci_conn *conn = NULL, *c;
abc5de8f 3530 unsigned int num = 0, min = ~0;
1da177e4 3531
8e87d142 3532 /* We don't have to lock device here. Connections are always
1da177e4 3533 * added and removed with TX task disabled. */
bf4c6325
GP		 3534
3535 rcu_read_lock();
3536
3537 list_for_each_entry_rcu(c, &h->list, list) {
769be974 3538 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 3539 continue;
769be974
MH		 3540
3541 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3542 continue;
3543
1da177e4
LT		 3544 num++;
3545
3546 if (c->sent < min) {
3547 min = c->sent;
3548 conn = c;
3549 }
52087a79
LAD		 3550
3551 if (hci_conn_num(hdev, type) == num)
3552 break;
1da177e4
LT		 3553 }
3554
bf4c6325
GP		 3555 rcu_read_unlock();
3556
1da177e4 3557 if (conn) {
6ed58ec5
VT		 3558 int cnt, q;
3559
3560 switch (conn->type) {
3561 case ACL_LINK:
3562 cnt = hdev->acl_cnt;
3563 break;
3564 case SCO_LINK:
3565 case ESCO_LINK:
3566 cnt = hdev->sco_cnt;
3567 break;
3568 case LE_LINK:
3569 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3570 break;
3571 default:
3572 cnt = 0;
3573 BT_ERR("Unknown link type");
3574 }
3575
3576 q = cnt / num;
1da177e4
LT		 3577 *quote = q ? q : 1;
3578 } else
3579 *quote = 0;
3580
3581 BT_DBG("conn %p quote %d", conn, *quote);
3582 return conn;
3583}
3584
6039aa73 3585static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 3586{
3587 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 3588 struct hci_conn *c;
1da177e4 3589
bae1f5d9 3590 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 3591
bf4c6325
GP		 3592 rcu_read_lock();
3593
1da177e4 3594 /* Kill stalled connections */
bf4c6325 3595 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9 3596 if (c->type == type && c->sent) {
6ed93dc6
AE		 3597 BT_ERR("%s killing stalled connection %pMR",
3598 hdev->name, &c->dst);
bed71748 3599 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
1da177e4
LT		 3600 }
3601 }
bf4c6325
GP		 3602
3603 rcu_read_unlock();
1da177e4
LT		 3604}
3605
6039aa73
GP		 3606static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3607 int *quote)
1da177e4 3608{
73d80deb
LAD		 3609 struct hci_conn_hash *h = &hdev->conn_hash;
3610 struct hci_chan *chan = NULL;
abc5de8f 3611 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 3612 struct hci_conn *conn;
73d80deb
LAD		 3613 int cnt, q, conn_num = 0;
3614
3615 BT_DBG("%s", hdev->name);
3616
bf4c6325
GP		 3617 rcu_read_lock();
3618
3619 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 3620 struct hci_chan *tmp;
3621
3622 if (conn->type != type)
3623 continue;
3624
3625 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3626 continue;
3627
3628 conn_num++;
3629
8192edef 3630 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 3631 struct sk_buff *skb;
3632
3633 if (skb_queue_empty(&tmp->data_q))
3634 continue;
3635
3636 skb = skb_peek(&tmp->data_q);
3637 if (skb->priority < cur_prio)
3638 continue;
3639
3640 if (skb->priority > cur_prio) {
3641 num = 0;
3642 min = ~0;
3643 cur_prio = skb->priority;
3644 }
3645
3646 num++;
3647
3648 if (conn->sent < min) {
3649 min = conn->sent;
3650 chan = tmp;
3651 }
3652 }
3653
3654 if (hci_conn_num(hdev, type) == conn_num)
3655 break;
3656 }
3657
bf4c6325
GP		 3658 rcu_read_unlock();
3659
73d80deb
LAD		 3660 if (!chan)
3661 return NULL;
3662
3663 switch (chan->conn->type) {
3664 case ACL_LINK:
3665 cnt = hdev->acl_cnt;
3666 break;
bd1eb66b
AE		 3667 case AMP_LINK:
3668 cnt = hdev->block_cnt;
3669 break;
73d80deb
LAD		 3670 case SCO_LINK:
3671 case ESCO_LINK:
3672 cnt = hdev->sco_cnt;
3673 break;
3674 case LE_LINK:
3675 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3676 break;
3677 default:
3678 cnt = 0;
3679 BT_ERR("Unknown link type");
3680 }
3681
3682 q = cnt / num;
3683 *quote = q ? q : 1;
3684 BT_DBG("chan %p quote %d", chan, *quote);
3685 return chan;
3686}
3687
02b20f0b
LAD		 3688static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3689{
3690 struct hci_conn_hash *h = &hdev->conn_hash;
3691 struct hci_conn *conn;
3692 int num = 0;
3693
3694 BT_DBG("%s", hdev->name);
3695
bf4c6325
GP		 3696 rcu_read_lock();
3697
3698 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 3699 struct hci_chan *chan;
3700
3701 if (conn->type != type)
3702 continue;
3703
3704 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3705 continue;
3706
3707 num++;
3708
8192edef 3709 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 3710 struct sk_buff *skb;
3711
3712 if (chan->sent) {
3713 chan->sent = 0;
3714 continue;
3715 }
3716
3717 if (skb_queue_empty(&chan->data_q))
3718 continue;
3719
3720 skb = skb_peek(&chan->data_q);
3721 if (skb->priority >= HCI_PRIO_MAX - 1)
3722 continue;
3723
3724 skb->priority = HCI_PRIO_MAX - 1;
3725
3726 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
a8c5fb1a 3727 skb->priority);
02b20f0b
LAD		 3728 }
3729
3730 if (hci_conn_num(hdev, type) == num)
3731 break;
3732 }
bf4c6325
GP		 3733
3734 rcu_read_unlock();
3735
02b20f0b
LAD		 3736}
3737
b71d385a
AE		 3738static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3739{
3740 /* Calculate count of blocks used by this packet */
3741 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3742}
3743
6039aa73 3744static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 3745{
d7a5a11d 3746 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1da177e4
LT		 3747 /* ACL tx timeout must be longer than maximum
3748 * link supervision timeout (40.9 seconds) */
63d2bc1b 3749 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
5f246e89 3750 HCI_ACL_TX_TIMEOUT))
bae1f5d9 3751 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 3752 }
63d2bc1b 3753}
1da177e4 3754
6039aa73 3755static void hci_sched_acl_pkt(struct hci_dev *hdev)
63d2bc1b
AE		 3756{
3757 unsigned int cnt = hdev->acl_cnt;
3758 struct hci_chan *chan;
3759 struct sk_buff *skb;
3760 int quote;
3761
3762 __check_timeout(hdev, cnt);
04837f64 3763
73d80deb 3764 while (hdev->acl_cnt &&
a8c5fb1a 3765 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 3766 u32 priority = (skb_peek(&chan->data_q))->priority;
3767 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3768 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3769 skb->len, skb->priority);
73d80deb 3770
ec1cce24
LAD		 3771 /* Stop if priority has changed */
3772 if (skb->priority < priority)
3773 break;
3774
3775 skb = skb_dequeue(&chan->data_q);
3776
73d80deb 3777 hci_conn_enter_active_mode(chan->conn,
04124681 3778 bt_cb(skb)->force_active);
04837f64 3779
57d17d70 3780 hci_send_frame(hdev, skb);
1da177e4
LT		 3781 hdev->acl_last_tx = jiffies;
3782
3783 hdev->acl_cnt--;
73d80deb
LAD		 3784 chan->sent++;
3785 chan->conn->sent++;
1da177e4
LT		 3786 }
3787 }
02b20f0b
LAD		 3788
3789 if (cnt != hdev->acl_cnt)
3790 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 3791}
3792
6039aa73 3793static void hci_sched_acl_blk(struct hci_dev *hdev)
b71d385a 3794{
63d2bc1b 3795 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 3796 struct hci_chan *chan;
3797 struct sk_buff *skb;
3798 int quote;
bd1eb66b 3799 u8 type;
b71d385a 3800
63d2bc1b 3801 __check_timeout(hdev, cnt);
b71d385a 3802
bd1eb66b
AE		 3803 BT_DBG("%s", hdev->name);
3804
3805 if (hdev->dev_type == HCI_AMP)
3806 type = AMP_LINK;
3807 else
3808 type = ACL_LINK;
3809
b71d385a 3810 while (hdev->block_cnt > 0 &&
bd1eb66b 3811 (chan = hci_chan_sent(hdev, type, &quote))) {
b71d385a
AE		 3812 u32 priority = (skb_peek(&chan->data_q))->priority;
3813 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3814 int blocks;
3815
3816 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3817 skb->len, skb->priority);
b71d385a
AE		 3818
3819 /* Stop if priority has changed */
3820 if (skb->priority < priority)
3821 break;
3822
3823 skb = skb_dequeue(&chan->data_q);
3824
3825 blocks = __get_blocks(hdev, skb);
3826 if (blocks > hdev->block_cnt)
3827 return;
3828
3829 hci_conn_enter_active_mode(chan->conn,
a8c5fb1a 3830 bt_cb(skb)->force_active);
b71d385a 3831
57d17d70 3832 hci_send_frame(hdev, skb);
b71d385a
AE		 3833 hdev->acl_last_tx = jiffies;
3834
3835 hdev->block_cnt -= blocks;
3836 quote -= blocks;
3837
3838 chan->sent += blocks;
3839 chan->conn->sent += blocks;
3840 }
3841 }
3842
3843 if (cnt != hdev->block_cnt)
bd1eb66b 3844 hci_prio_recalculate(hdev, type);
b71d385a
AE		 3845}
3846
6039aa73 3847static void hci_sched_acl(struct hci_dev *hdev)
b71d385a
AE		 3848{
3849 BT_DBG("%s", hdev->name);
3850
bd1eb66b 3851 /* No ACL link over BR/EDR controller */
ca8bee5d 3852 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
bd1eb66b
AE		 3853 return;
3854
3855 /* No AMP link over AMP controller */
3856 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
b71d385a
AE		 3857 return;
3858
3859 switch (hdev->flow_ctl_mode) {
3860 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3861 hci_sched_acl_pkt(hdev);
3862 break;
3863
3864 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3865 hci_sched_acl_blk(hdev);
3866 break;
3867 }
3868}
3869
1da177e4 3870/* Schedule SCO */
6039aa73 3871static void hci_sched_sco(struct hci_dev *hdev)
1da177e4
LT		 3872{
3873 struct hci_conn *conn;
3874 struct sk_buff *skb;
3875 int quote;
3876
3877 BT_DBG("%s", hdev->name);
3878
52087a79
LAD		 3879 if (!hci_conn_num(hdev, SCO_LINK))
3880 return;
3881
1da177e4
LT		 3882 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3883 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3884 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3885 hci_send_frame(hdev, skb);
1da177e4
LT		 3886
3887 conn->sent++;
3888 if (conn->sent == ~0)
3889 conn->sent = 0;
3890 }
3891 }
3892}
3893
6039aa73 3894static void hci_sched_esco(struct hci_dev *hdev)
b6a0dc82
MH		 3895{
3896 struct hci_conn *conn;
3897 struct sk_buff *skb;
3898 int quote;
3899
3900 BT_DBG("%s", hdev->name);
3901
52087a79
LAD		 3902 if (!hci_conn_num(hdev, ESCO_LINK))
3903 return;
3904
8fc9ced3
GP		 3905 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3906 &quote))) {
b6a0dc82
MH		 3907 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3908 BT_DBG("skb %p len %d", skb, skb->len);
57d17d70 3909 hci_send_frame(hdev, skb);
b6a0dc82
MH		 3910
3911 conn->sent++;
3912 if (conn->sent == ~0)
3913 conn->sent = 0;
3914 }
3915 }
3916}
3917
6039aa73 3918static void hci_sched_le(struct hci_dev *hdev)
6ed58ec5 3919{
73d80deb 3920 struct hci_chan *chan;
6ed58ec5 3921 struct sk_buff *skb;
02b20f0b 3922 int quote, cnt, tmp;
6ed58ec5
VT		 3923
3924 BT_DBG("%s", hdev->name);
3925
52087a79
LAD		 3926 if (!hci_conn_num(hdev, LE_LINK))
3927 return;
3928
d7a5a11d 3929 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
6ed58ec5
VT		 3930 /* LE tx timeout must be longer than maximum
3931 * link supervision timeout (40.9 seconds) */
bae1f5d9 3932 if (!hdev->le_cnt && hdev->le_pkts &&
a8c5fb1a 3933 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 3934 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 3935 }
3936
3937 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 3938 tmp = cnt;
73d80deb 3939 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 3940 u32 priority = (skb_peek(&chan->data_q))->priority;
3941 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb 3942 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
a8c5fb1a 3943 skb->len, skb->priority);
6ed58ec5 3944
ec1cce24
LAD		 3945 /* Stop if priority has changed */
3946 if (skb->priority < priority)
3947 break;
3948
3949 skb = skb_dequeue(&chan->data_q);
3950
57d17d70 3951 hci_send_frame(hdev, skb);
6ed58ec5
VT		 3952 hdev->le_last_tx = jiffies;
3953
3954 cnt--;
73d80deb
LAD		 3955 chan->sent++;
3956 chan->conn->sent++;
6ed58ec5
VT		 3957 }
3958 }
73d80deb 3959
6ed58ec5
VT		 3960 if (hdev->le_pkts)
3961 hdev->le_cnt = cnt;
3962 else
3963 hdev->acl_cnt = cnt;
02b20f0b
LAD		 3964
3965 if (cnt != tmp)
3966 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 3967}
3968
3eff45ea 3969static void hci_tx_work(struct work_struct *work)
1da177e4 3970{
3eff45ea 3971 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 3972 struct sk_buff *skb;
3973
6ed58ec5 3974 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
a8c5fb1a 3975 hdev->sco_cnt, hdev->le_cnt);
1da177e4 3976
d7a5a11d 3977 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
52de599e
MH		 3978 /* Schedule queues and send stuff to HCI driver */
3979 hci_sched_acl(hdev);
3980 hci_sched_sco(hdev);
3981 hci_sched_esco(hdev);
3982 hci_sched_le(hdev);
3983 }
6ed58ec5 3984
1da177e4
LT		 3985 /* Send next queued raw (unknown type) packet */
3986 while ((skb = skb_dequeue(&hdev->raw_q)))
57d17d70 3987 hci_send_frame(hdev, skb);
1da177e4
LT		 3988}
3989
25985edc 3990/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 3991
3992/* ACL data packet */
6039aa73 3993static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 3994{
3995 struct hci_acl_hdr *hdr = (void *) skb->data;
3996 struct hci_conn *conn;
3997 __u16 handle, flags;
3998
3999 skb_pull(skb, HCI_ACL_HDR_SIZE);
4000
4001 handle = __le16_to_cpu(hdr->handle);
4002 flags = hci_flags(handle);
4003 handle = hci_handle(handle);
4004
f0e09510 4005 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
a8c5fb1a 4006 handle, flags);
1da177e4
LT		 4007
4008 hdev->stat.acl_rx++;
4009
4010 hci_dev_lock(hdev);
4011 conn = hci_conn_hash_lookup_handle(hdev, handle);
4012 hci_dev_unlock(hdev);
8e87d142 4013
1da177e4 4014 if (conn) {
65983fc7 4015 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 4016
1da177e4 4017 /* Send to upper protocol */
686ebf28
UF		 4018 l2cap_recv_acldata(conn, skb, flags);
4019 return;
1da177e4 4020 } else {
8e87d142 4021 BT_ERR("%s ACL packet for unknown connection handle %d",
a8c5fb1a 4022 hdev->name, handle);
1da177e4
LT		 4023 }
4024
4025 kfree_skb(skb);
4026}
4027
4028/* SCO data packet */
6039aa73 4029static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
1da177e4
LT		 4030{
4031 struct hci_sco_hdr *hdr = (void *) skb->data;
4032 struct hci_conn *conn;
4033 __u16 handle;
4034
4035 skb_pull(skb, HCI_SCO_HDR_SIZE);
4036
4037 handle = __le16_to_cpu(hdr->handle);
4038
f0e09510 4039 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
1da177e4
LT		 4040
4041 hdev->stat.sco_rx++;
4042
4043 hci_dev_lock(hdev);
4044 conn = hci_conn_hash_lookup_handle(hdev, handle);
4045 hci_dev_unlock(hdev);
4046
4047 if (conn) {
1da177e4 4048 /* Send to upper protocol */
686ebf28
UF		 4049 sco_recv_scodata(conn, skb);
4050 return;
1da177e4 4051 } else {
8e87d142 4052 BT_ERR("%s SCO packet for unknown connection handle %d",
a8c5fb1a 4053 hdev->name, handle);
1da177e4
LT		 4054 }
4055
4056 kfree_skb(skb);
4057}
4058
9238f36a
JH		 4059static bool hci_req_is_complete(struct hci_dev *hdev)
4060{
4061 struct sk_buff *skb;
4062
4063 skb = skb_peek(&hdev->cmd_q);
4064 if (!skb)
4065 return true;
4066
44d27137 4067 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
9238f36a
JH		 4068}
4069
42c6b129
JH		 4070static void hci_resend_last(struct hci_dev *hdev)
4071{
4072 struct hci_command_hdr *sent;
4073 struct sk_buff *skb;
4074 u16 opcode;
4075
4076 if (!hdev->sent_cmd)
4077 return;
4078
4079 sent = (void *) hdev->sent_cmd->data;
4080 opcode = __le16_to_cpu(sent->opcode);
4081 if (opcode == HCI_OP_RESET)
4082 return;
4083
4084 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4085 if (!skb)
4086 return;
4087
4088 skb_queue_head(&hdev->cmd_q, skb);
4089 queue_work(hdev->workqueue, &hdev->cmd_work);
4090}
4091
e6214487
JH		 4092void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4093 hci_req_complete_t *req_complete,
4094 hci_req_complete_skb_t *req_complete_skb)
9238f36a 4095{
9238f36a
JH		 4096 struct sk_buff *skb;
4097 unsigned long flags;
4098
4099 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4100
42c6b129
JH		 4101 /* If the completed command doesn't match the last one that was
4102 * sent we need to do special handling of it.
9238f36a 4103 */
42c6b129
JH		 4104 if (!hci_sent_cmd_data(hdev, opcode)) {
4105 /* Some CSR based controllers generate a spontaneous
4106 * reset complete event during init and any pending
4107 * command will never be completed. In such a case we
4108 * need to resend whatever was the last sent
4109 * command.
4110 */
4111 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4112 hci_resend_last(hdev);
4113
9238f36a 4114 return;
42c6b129 4115 }
9238f36a
JH		 4116
4117 /* If the command succeeded and there's still more commands in
4118 * this request the request is not yet complete.
4119 */
4120 if (!status && !hci_req_is_complete(hdev))
4121 return;
4122
4123 /* If this was the last command in a request the complete
4124 * callback would be found in hdev->sent_cmd instead of the
4125 * command queue (hdev->cmd_q).
4126 */
44d27137
JH		 4127 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4128 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
e6214487
JH		 4129 return;
4130 }
53e21fbc 4131
44d27137
JH		 4132 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4133 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
e6214487 4134 return;
9238f36a
JH		 4135 }
4136
4137 /* Remove all pending commands belonging to this request */
4138 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4139 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
44d27137 4140 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
9238f36a
JH		 4141 __skb_queue_head(&hdev->cmd_q, skb);
4142 break;
4143 }
4144
3bd7594e
DA		 4145 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4146 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4147 else
4148 *req_complete = bt_cb(skb)->hci.req_complete;
9238f36a
JH		 4149 kfree_skb(skb);
4150 }
4151 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
9238f36a
JH		 4152}
4153
b78752cc 4154static void hci_rx_work(struct work_struct *work)
1da177e4 4155{
b78752cc 4156 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 4157 struct sk_buff *skb;
4158
4159 BT_DBG("%s", hdev->name);
4160
1da177e4 4161 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 4162 /* Send copy to monitor */
4163 hci_send_to_monitor(hdev, skb);
4164
1da177e4
LT		 4165 if (atomic_read(&hdev->promisc)) {
4166 /* Send copy to the sockets */
470fe1b5 4167 hci_send_to_sock(hdev, skb);
1da177e4
LT		 4168 }
4169
d7a5a11d 4170 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1da177e4
LT		 4171 kfree_skb(skb);
4172 continue;
4173 }
4174
4175 if (test_bit(HCI_INIT, &hdev->flags)) {
4176 /* Don't process data packets in this states. */
d79f34e3 4177 switch (hci_skb_pkt_type(skb)) {
1da177e4
LT		 4178 case HCI_ACLDATA_PKT:
4179 case HCI_SCODATA_PKT:
4180 kfree_skb(skb);
4181 continue;
3ff50b79 4182 }
1da177e4
LT		 4183 }
4184
4185 /* Process frame */
d79f34e3 4186 switch (hci_skb_pkt_type(skb)) {
1da177e4 4187 case HCI_EVENT_PKT:
b78752cc 4188 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 4189 hci_event_packet(hdev, skb);
4190 break;
4191
4192 case HCI_ACLDATA_PKT:
4193 BT_DBG("%s ACL data packet", hdev->name);
4194 hci_acldata_packet(hdev, skb);
4195 break;
4196
4197 case HCI_SCODATA_PKT:
4198 BT_DBG("%s SCO data packet", hdev->name);
4199 hci_scodata_packet(hdev, skb);
4200 break;
4201
4202 default:
4203 kfree_skb(skb);
4204 break;
4205 }
4206 }
1da177e4
LT		 4207}
4208
c347b765 4209static void hci_cmd_work(struct work_struct *work)
1da177e4 4210{
c347b765 4211 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 4212 struct sk_buff *skb;
4213
2104786b
AE		 4214 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4215 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
1da177e4 4216
1da177e4 4217 /* Send queued commands */
5a08ecce
AE		 4218 if (atomic_read(&hdev->cmd_cnt)) {
4219 skb = skb_dequeue(&hdev->cmd_q);
4220 if (!skb)
4221 return;
4222
7585b97a 4223 kfree_skb(hdev->sent_cmd);
1da177e4 4224
a675d7f1 4225 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
70f23020 4226 if (hdev->sent_cmd) {
1da177e4 4227 atomic_dec(&hdev->cmd_cnt);
57d17d70 4228 hci_send_frame(hdev, skb);
7bdb8a5c 4229 if (test_bit(HCI_RESET, &hdev->flags))
65cc2b49 4230 cancel_delayed_work(&hdev->cmd_timer);
7bdb8a5c 4231 else
65cc2b49
MH		 4232 schedule_delayed_work(&hdev->cmd_timer,
4233 HCI_CMD_TIMEOUT);
1da177e4
LT		 4234 } else {
4235 skb_queue_head(&hdev->cmd_q, skb);
c347b765 4236 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 4237 }
4238 }
4239}
Linux kernel - Deliverables
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