2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
26 /* Bluetooth HCI core. */
28 #include <linux/export.h>
29 #include <linux/idr.h>
30 #include <linux/rfkill.h>
31 #include <linux/debugfs.h>
32 #include <linux/crypto.h>
33 #include <asm/unaligned.h>
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37 #include <net/bluetooth/l2cap.h>
38 #include <net/bluetooth/mgmt.h>
42 static void hci_rx_work(struct work_struct
*work
);
43 static void hci_cmd_work(struct work_struct
*work
);
44 static void hci_tx_work(struct work_struct
*work
);
47 LIST_HEAD(hci_dev_list
);
48 DEFINE_RWLOCK(hci_dev_list_lock
);
50 /* HCI callback list */
51 LIST_HEAD(hci_cb_list
);
52 DEFINE_RWLOCK(hci_cb_list_lock
);
54 /* HCI ID Numbering */
55 static DEFINE_IDA(hci_index_ida
);
57 /* ----- HCI requests ----- */
59 #define HCI_REQ_DONE 0
60 #define HCI_REQ_PEND 1
61 #define HCI_REQ_CANCELED 2
63 #define hci_req_lock(d) mutex_lock(&d->req_lock)
64 #define hci_req_unlock(d) mutex_unlock(&d->req_lock)
66 /* ---- HCI notifications ---- */
68 static void hci_notify(struct hci_dev
*hdev
, int event
)
70 hci_sock_dev_event(hdev
, event
);
73 /* ---- HCI debugfs entries ---- */
75 static ssize_t
dut_mode_read(struct file
*file
, char __user
*user_buf
,
76 size_t count
, loff_t
*ppos
)
78 struct hci_dev
*hdev
= file
->private_data
;
81 buf
[0] = test_bit(HCI_DUT_MODE
, &hdev
->dbg_flags
) ? 'Y': 'N';
84 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, 2);
87 static ssize_t
dut_mode_write(struct file
*file
, const char __user
*user_buf
,
88 size_t count
, loff_t
*ppos
)
90 struct hci_dev
*hdev
= file
->private_data
;
93 size_t buf_size
= min(count
, (sizeof(buf
)-1));
97 if (!test_bit(HCI_UP
, &hdev
->flags
))
100 if (copy_from_user(buf
, user_buf
, buf_size
))
103 buf
[buf_size
] = '\0';
104 if (strtobool(buf
, &enable
))
107 if (enable
== test_bit(HCI_DUT_MODE
, &hdev
->dbg_flags
))
112 skb
= __hci_cmd_sync(hdev
, HCI_OP_ENABLE_DUT_MODE
, 0, NULL
,
115 skb
= __hci_cmd_sync(hdev
, HCI_OP_RESET
, 0, NULL
,
117 hci_req_unlock(hdev
);
122 err
= -bt_to_errno(skb
->data
[0]);
128 change_bit(HCI_DUT_MODE
, &hdev
->dbg_flags
);
133 static const struct file_operations dut_mode_fops
= {
135 .read
= dut_mode_read
,
136 .write
= dut_mode_write
,
137 .llseek
= default_llseek
,
140 static int features_show(struct seq_file
*f
, void *ptr
)
142 struct hci_dev
*hdev
= f
->private;
146 for (p
= 0; p
< HCI_MAX_PAGES
&& p
<= hdev
->max_page
; p
++) {
147 seq_printf(f
, "%2u: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
148 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n", p
,
149 hdev
->features
[p
][0], hdev
->features
[p
][1],
150 hdev
->features
[p
][2], hdev
->features
[p
][3],
151 hdev
->features
[p
][4], hdev
->features
[p
][5],
152 hdev
->features
[p
][6], hdev
->features
[p
][7]);
154 if (lmp_le_capable(hdev
))
155 seq_printf(f
, "LE: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x "
156 "0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n",
157 hdev
->le_features
[0], hdev
->le_features
[1],
158 hdev
->le_features
[2], hdev
->le_features
[3],
159 hdev
->le_features
[4], hdev
->le_features
[5],
160 hdev
->le_features
[6], hdev
->le_features
[7]);
161 hci_dev_unlock(hdev
);
166 static int features_open(struct inode
*inode
, struct file
*file
)
168 return single_open(file
, features_show
, inode
->i_private
);
171 static const struct file_operations features_fops
= {
172 .open
= features_open
,
175 .release
= single_release
,
178 static int blacklist_show(struct seq_file
*f
, void *p
)
180 struct hci_dev
*hdev
= f
->private;
181 struct bdaddr_list
*b
;
184 list_for_each_entry(b
, &hdev
->blacklist
, list
)
185 seq_printf(f
, "%pMR (type %u)\n", &b
->bdaddr
, b
->bdaddr_type
);
186 hci_dev_unlock(hdev
);
191 static int blacklist_open(struct inode
*inode
, struct file
*file
)
193 return single_open(file
, blacklist_show
, inode
->i_private
);
196 static const struct file_operations blacklist_fops
= {
197 .open
= blacklist_open
,
200 .release
= single_release
,
203 static int whitelist_show(struct seq_file
*f
, void *p
)
205 struct hci_dev
*hdev
= f
->private;
206 struct bdaddr_list
*b
;
209 list_for_each_entry(b
, &hdev
->whitelist
, list
)
210 seq_printf(f
, "%pMR (type %u)\n", &b
->bdaddr
, b
->bdaddr_type
);
211 hci_dev_unlock(hdev
);
216 static int whitelist_open(struct inode
*inode
, struct file
*file
)
218 return single_open(file
, whitelist_show
, inode
->i_private
);
221 static const struct file_operations whitelist_fops
= {
222 .open
= whitelist_open
,
225 .release
= single_release
,
228 static int uuids_show(struct seq_file
*f
, void *p
)
230 struct hci_dev
*hdev
= f
->private;
231 struct bt_uuid
*uuid
;
234 list_for_each_entry(uuid
, &hdev
->uuids
, list
) {
237 /* The Bluetooth UUID values are stored in big endian,
238 * but with reversed byte order. So convert them into
239 * the right order for the %pUb modifier.
241 for (i
= 0; i
< 16; i
++)
242 val
[i
] = uuid
->uuid
[15 - i
];
244 seq_printf(f
, "%pUb\n", val
);
246 hci_dev_unlock(hdev
);
251 static int uuids_open(struct inode
*inode
, struct file
*file
)
253 return single_open(file
, uuids_show
, inode
->i_private
);
256 static const struct file_operations uuids_fops
= {
260 .release
= single_release
,
263 static int inquiry_cache_show(struct seq_file
*f
, void *p
)
265 struct hci_dev
*hdev
= f
->private;
266 struct discovery_state
*cache
= &hdev
->discovery
;
267 struct inquiry_entry
*e
;
271 list_for_each_entry(e
, &cache
->all
, all
) {
272 struct inquiry_data
*data
= &e
->data
;
273 seq_printf(f
, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
275 data
->pscan_rep_mode
, data
->pscan_period_mode
,
276 data
->pscan_mode
, data
->dev_class
[2],
277 data
->dev_class
[1], data
->dev_class
[0],
278 __le16_to_cpu(data
->clock_offset
),
279 data
->rssi
, data
->ssp_mode
, e
->timestamp
);
282 hci_dev_unlock(hdev
);
287 static int inquiry_cache_open(struct inode
*inode
, struct file
*file
)
289 return single_open(file
, inquiry_cache_show
, inode
->i_private
);
292 static const struct file_operations inquiry_cache_fops
= {
293 .open
= inquiry_cache_open
,
296 .release
= single_release
,
299 static int link_keys_show(struct seq_file
*f
, void *ptr
)
301 struct hci_dev
*hdev
= f
->private;
302 struct list_head
*p
, *n
;
305 list_for_each_safe(p
, n
, &hdev
->link_keys
) {
306 struct link_key
*key
= list_entry(p
, struct link_key
, list
);
307 seq_printf(f
, "%pMR %u %*phN %u\n", &key
->bdaddr
, key
->type
,
308 HCI_LINK_KEY_SIZE
, key
->val
, key
->pin_len
);
310 hci_dev_unlock(hdev
);
315 static int link_keys_open(struct inode
*inode
, struct file
*file
)
317 return single_open(file
, link_keys_show
, inode
->i_private
);
320 static const struct file_operations link_keys_fops
= {
321 .open
= link_keys_open
,
324 .release
= single_release
,
327 static int dev_class_show(struct seq_file
*f
, void *ptr
)
329 struct hci_dev
*hdev
= f
->private;
332 seq_printf(f
, "0x%.2x%.2x%.2x\n", hdev
->dev_class
[2],
333 hdev
->dev_class
[1], hdev
->dev_class
[0]);
334 hci_dev_unlock(hdev
);
339 static int dev_class_open(struct inode
*inode
, struct file
*file
)
341 return single_open(file
, dev_class_show
, inode
->i_private
);
344 static const struct file_operations dev_class_fops
= {
345 .open
= dev_class_open
,
348 .release
= single_release
,
351 static int voice_setting_get(void *data
, u64
*val
)
353 struct hci_dev
*hdev
= data
;
356 *val
= hdev
->voice_setting
;
357 hci_dev_unlock(hdev
);
362 DEFINE_SIMPLE_ATTRIBUTE(voice_setting_fops
, voice_setting_get
,
363 NULL
, "0x%4.4llx\n");
365 static int auto_accept_delay_set(void *data
, u64 val
)
367 struct hci_dev
*hdev
= data
;
370 hdev
->auto_accept_delay
= val
;
371 hci_dev_unlock(hdev
);
376 static int auto_accept_delay_get(void *data
, u64
*val
)
378 struct hci_dev
*hdev
= data
;
381 *val
= hdev
->auto_accept_delay
;
382 hci_dev_unlock(hdev
);
387 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops
, auto_accept_delay_get
,
388 auto_accept_delay_set
, "%llu\n");
390 static ssize_t
force_sc_support_read(struct file
*file
, char __user
*user_buf
,
391 size_t count
, loff_t
*ppos
)
393 struct hci_dev
*hdev
= file
->private_data
;
396 buf
[0] = test_bit(HCI_FORCE_SC
, &hdev
->dbg_flags
) ? 'Y': 'N';
399 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, 2);
402 static ssize_t
force_sc_support_write(struct file
*file
,
403 const char __user
*user_buf
,
404 size_t count
, loff_t
*ppos
)
406 struct hci_dev
*hdev
= file
->private_data
;
408 size_t buf_size
= min(count
, (sizeof(buf
)-1));
411 if (test_bit(HCI_UP
, &hdev
->flags
))
414 if (copy_from_user(buf
, user_buf
, buf_size
))
417 buf
[buf_size
] = '\0';
418 if (strtobool(buf
, &enable
))
421 if (enable
== test_bit(HCI_FORCE_SC
, &hdev
->dbg_flags
))
424 change_bit(HCI_FORCE_SC
, &hdev
->dbg_flags
);
429 static const struct file_operations force_sc_support_fops
= {
431 .read
= force_sc_support_read
,
432 .write
= force_sc_support_write
,
433 .llseek
= default_llseek
,
436 static ssize_t
sc_only_mode_read(struct file
*file
, char __user
*user_buf
,
437 size_t count
, loff_t
*ppos
)
439 struct hci_dev
*hdev
= file
->private_data
;
442 buf
[0] = test_bit(HCI_SC_ONLY
, &hdev
->dev_flags
) ? 'Y': 'N';
445 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, 2);
448 static const struct file_operations sc_only_mode_fops
= {
450 .read
= sc_only_mode_read
,
451 .llseek
= default_llseek
,
454 static int idle_timeout_set(void *data
, u64 val
)
456 struct hci_dev
*hdev
= data
;
458 if (val
!= 0 && (val
< 500 || val
> 3600000))
462 hdev
->idle_timeout
= val
;
463 hci_dev_unlock(hdev
);
468 static int idle_timeout_get(void *data
, u64
*val
)
470 struct hci_dev
*hdev
= data
;
473 *val
= hdev
->idle_timeout
;
474 hci_dev_unlock(hdev
);
479 DEFINE_SIMPLE_ATTRIBUTE(idle_timeout_fops
, idle_timeout_get
,
480 idle_timeout_set
, "%llu\n");
482 static int rpa_timeout_set(void *data
, u64 val
)
484 struct hci_dev
*hdev
= data
;
486 /* Require the RPA timeout to be at least 30 seconds and at most
489 if (val
< 30 || val
> (60 * 60 * 24))
493 hdev
->rpa_timeout
= val
;
494 hci_dev_unlock(hdev
);
499 static int rpa_timeout_get(void *data
, u64
*val
)
501 struct hci_dev
*hdev
= data
;
504 *val
= hdev
->rpa_timeout
;
505 hci_dev_unlock(hdev
);
510 DEFINE_SIMPLE_ATTRIBUTE(rpa_timeout_fops
, rpa_timeout_get
,
511 rpa_timeout_set
, "%llu\n");
513 static int sniff_min_interval_set(void *data
, u64 val
)
515 struct hci_dev
*hdev
= data
;
517 if (val
== 0 || val
% 2 || val
> hdev
->sniff_max_interval
)
521 hdev
->sniff_min_interval
= val
;
522 hci_dev_unlock(hdev
);
527 static int sniff_min_interval_get(void *data
, u64
*val
)
529 struct hci_dev
*hdev
= data
;
532 *val
= hdev
->sniff_min_interval
;
533 hci_dev_unlock(hdev
);
538 DEFINE_SIMPLE_ATTRIBUTE(sniff_min_interval_fops
, sniff_min_interval_get
,
539 sniff_min_interval_set
, "%llu\n");
541 static int sniff_max_interval_set(void *data
, u64 val
)
543 struct hci_dev
*hdev
= data
;
545 if (val
== 0 || val
% 2 || val
< hdev
->sniff_min_interval
)
549 hdev
->sniff_max_interval
= val
;
550 hci_dev_unlock(hdev
);
555 static int sniff_max_interval_get(void *data
, u64
*val
)
557 struct hci_dev
*hdev
= data
;
560 *val
= hdev
->sniff_max_interval
;
561 hci_dev_unlock(hdev
);
566 DEFINE_SIMPLE_ATTRIBUTE(sniff_max_interval_fops
, sniff_max_interval_get
,
567 sniff_max_interval_set
, "%llu\n");
569 static int conn_info_min_age_set(void *data
, u64 val
)
571 struct hci_dev
*hdev
= data
;
573 if (val
== 0 || val
> hdev
->conn_info_max_age
)
577 hdev
->conn_info_min_age
= val
;
578 hci_dev_unlock(hdev
);
583 static int conn_info_min_age_get(void *data
, u64
*val
)
585 struct hci_dev
*hdev
= data
;
588 *val
= hdev
->conn_info_min_age
;
589 hci_dev_unlock(hdev
);
594 DEFINE_SIMPLE_ATTRIBUTE(conn_info_min_age_fops
, conn_info_min_age_get
,
595 conn_info_min_age_set
, "%llu\n");
597 static int conn_info_max_age_set(void *data
, u64 val
)
599 struct hci_dev
*hdev
= data
;
601 if (val
== 0 || val
< hdev
->conn_info_min_age
)
605 hdev
->conn_info_max_age
= val
;
606 hci_dev_unlock(hdev
);
611 static int conn_info_max_age_get(void *data
, u64
*val
)
613 struct hci_dev
*hdev
= data
;
616 *val
= hdev
->conn_info_max_age
;
617 hci_dev_unlock(hdev
);
622 DEFINE_SIMPLE_ATTRIBUTE(conn_info_max_age_fops
, conn_info_max_age_get
,
623 conn_info_max_age_set
, "%llu\n");
625 static int identity_show(struct seq_file
*f
, void *p
)
627 struct hci_dev
*hdev
= f
->private;
633 hci_copy_identity_address(hdev
, &addr
, &addr_type
);
635 seq_printf(f
, "%pMR (type %u) %*phN %pMR\n", &addr
, addr_type
,
636 16, hdev
->irk
, &hdev
->rpa
);
638 hci_dev_unlock(hdev
);
643 static int identity_open(struct inode
*inode
, struct file
*file
)
645 return single_open(file
, identity_show
, inode
->i_private
);
648 static const struct file_operations identity_fops
= {
649 .open
= identity_open
,
652 .release
= single_release
,
655 static int random_address_show(struct seq_file
*f
, void *p
)
657 struct hci_dev
*hdev
= f
->private;
660 seq_printf(f
, "%pMR\n", &hdev
->random_addr
);
661 hci_dev_unlock(hdev
);
666 static int random_address_open(struct inode
*inode
, struct file
*file
)
668 return single_open(file
, random_address_show
, inode
->i_private
);
671 static const struct file_operations random_address_fops
= {
672 .open
= random_address_open
,
675 .release
= single_release
,
678 static int static_address_show(struct seq_file
*f
, void *p
)
680 struct hci_dev
*hdev
= f
->private;
683 seq_printf(f
, "%pMR\n", &hdev
->static_addr
);
684 hci_dev_unlock(hdev
);
689 static int static_address_open(struct inode
*inode
, struct file
*file
)
691 return single_open(file
, static_address_show
, inode
->i_private
);
694 static const struct file_operations static_address_fops
= {
695 .open
= static_address_open
,
698 .release
= single_release
,
701 static ssize_t
force_static_address_read(struct file
*file
,
702 char __user
*user_buf
,
703 size_t count
, loff_t
*ppos
)
705 struct hci_dev
*hdev
= file
->private_data
;
708 buf
[0] = test_bit(HCI_FORCE_STATIC_ADDR
, &hdev
->dbg_flags
) ? 'Y': 'N';
711 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, 2);
714 static ssize_t
force_static_address_write(struct file
*file
,
715 const char __user
*user_buf
,
716 size_t count
, loff_t
*ppos
)
718 struct hci_dev
*hdev
= file
->private_data
;
720 size_t buf_size
= min(count
, (sizeof(buf
)-1));
723 if (test_bit(HCI_UP
, &hdev
->flags
))
726 if (copy_from_user(buf
, user_buf
, buf_size
))
729 buf
[buf_size
] = '\0';
730 if (strtobool(buf
, &enable
))
733 if (enable
== test_bit(HCI_FORCE_STATIC_ADDR
, &hdev
->dbg_flags
))
736 change_bit(HCI_FORCE_STATIC_ADDR
, &hdev
->dbg_flags
);
741 static const struct file_operations force_static_address_fops
= {
743 .read
= force_static_address_read
,
744 .write
= force_static_address_write
,
745 .llseek
= default_llseek
,
748 static int white_list_show(struct seq_file
*f
, void *ptr
)
750 struct hci_dev
*hdev
= f
->private;
751 struct bdaddr_list
*b
;
754 list_for_each_entry(b
, &hdev
->le_white_list
, list
)
755 seq_printf(f
, "%pMR (type %u)\n", &b
->bdaddr
, b
->bdaddr_type
);
756 hci_dev_unlock(hdev
);
761 static int white_list_open(struct inode
*inode
, struct file
*file
)
763 return single_open(file
, white_list_show
, inode
->i_private
);
766 static const struct file_operations white_list_fops
= {
767 .open
= white_list_open
,
770 .release
= single_release
,
773 static int identity_resolving_keys_show(struct seq_file
*f
, void *ptr
)
775 struct hci_dev
*hdev
= f
->private;
776 struct list_head
*p
, *n
;
779 list_for_each_safe(p
, n
, &hdev
->identity_resolving_keys
) {
780 struct smp_irk
*irk
= list_entry(p
, struct smp_irk
, list
);
781 seq_printf(f
, "%pMR (type %u) %*phN %pMR\n",
782 &irk
->bdaddr
, irk
->addr_type
,
783 16, irk
->val
, &irk
->rpa
);
785 hci_dev_unlock(hdev
);
790 static int identity_resolving_keys_open(struct inode
*inode
, struct file
*file
)
792 return single_open(file
, identity_resolving_keys_show
,
796 static const struct file_operations identity_resolving_keys_fops
= {
797 .open
= identity_resolving_keys_open
,
800 .release
= single_release
,
803 static int long_term_keys_show(struct seq_file
*f
, void *ptr
)
805 struct hci_dev
*hdev
= f
->private;
806 struct list_head
*p
, *n
;
809 list_for_each_safe(p
, n
, &hdev
->long_term_keys
) {
810 struct smp_ltk
*ltk
= list_entry(p
, struct smp_ltk
, list
);
811 seq_printf(f
, "%pMR (type %u) %u 0x%02x %u %.4x %.16llx %*phN\n",
812 <k
->bdaddr
, ltk
->bdaddr_type
, ltk
->authenticated
,
813 ltk
->type
, ltk
->enc_size
, __le16_to_cpu(ltk
->ediv
),
814 __le64_to_cpu(ltk
->rand
), 16, ltk
->val
);
816 hci_dev_unlock(hdev
);
821 static int long_term_keys_open(struct inode
*inode
, struct file
*file
)
823 return single_open(file
, long_term_keys_show
, inode
->i_private
);
826 static const struct file_operations long_term_keys_fops
= {
827 .open
= long_term_keys_open
,
830 .release
= single_release
,
833 static int conn_min_interval_set(void *data
, u64 val
)
835 struct hci_dev
*hdev
= data
;
837 if (val
< 0x0006 || val
> 0x0c80 || val
> hdev
->le_conn_max_interval
)
841 hdev
->le_conn_min_interval
= val
;
842 hci_dev_unlock(hdev
);
847 static int conn_min_interval_get(void *data
, u64
*val
)
849 struct hci_dev
*hdev
= data
;
852 *val
= hdev
->le_conn_min_interval
;
853 hci_dev_unlock(hdev
);
858 DEFINE_SIMPLE_ATTRIBUTE(conn_min_interval_fops
, conn_min_interval_get
,
859 conn_min_interval_set
, "%llu\n");
861 static int conn_max_interval_set(void *data
, u64 val
)
863 struct hci_dev
*hdev
= data
;
865 if (val
< 0x0006 || val
> 0x0c80 || val
< hdev
->le_conn_min_interval
)
869 hdev
->le_conn_max_interval
= val
;
870 hci_dev_unlock(hdev
);
875 static int conn_max_interval_get(void *data
, u64
*val
)
877 struct hci_dev
*hdev
= data
;
880 *val
= hdev
->le_conn_max_interval
;
881 hci_dev_unlock(hdev
);
886 DEFINE_SIMPLE_ATTRIBUTE(conn_max_interval_fops
, conn_max_interval_get
,
887 conn_max_interval_set
, "%llu\n");
889 static int conn_latency_set(void *data
, u64 val
)
891 struct hci_dev
*hdev
= data
;
897 hdev
->le_conn_latency
= val
;
898 hci_dev_unlock(hdev
);
903 static int conn_latency_get(void *data
, u64
*val
)
905 struct hci_dev
*hdev
= data
;
908 *val
= hdev
->le_conn_latency
;
909 hci_dev_unlock(hdev
);
914 DEFINE_SIMPLE_ATTRIBUTE(conn_latency_fops
, conn_latency_get
,
915 conn_latency_set
, "%llu\n");
917 static int supervision_timeout_set(void *data
, u64 val
)
919 struct hci_dev
*hdev
= data
;
921 if (val
< 0x000a || val
> 0x0c80)
925 hdev
->le_supv_timeout
= val
;
926 hci_dev_unlock(hdev
);
931 static int supervision_timeout_get(void *data
, u64
*val
)
933 struct hci_dev
*hdev
= data
;
936 *val
= hdev
->le_supv_timeout
;
937 hci_dev_unlock(hdev
);
942 DEFINE_SIMPLE_ATTRIBUTE(supervision_timeout_fops
, supervision_timeout_get
,
943 supervision_timeout_set
, "%llu\n");
945 static int adv_channel_map_set(void *data
, u64 val
)
947 struct hci_dev
*hdev
= data
;
949 if (val
< 0x01 || val
> 0x07)
953 hdev
->le_adv_channel_map
= val
;
954 hci_dev_unlock(hdev
);
959 static int adv_channel_map_get(void *data
, u64
*val
)
961 struct hci_dev
*hdev
= data
;
964 *val
= hdev
->le_adv_channel_map
;
965 hci_dev_unlock(hdev
);
970 DEFINE_SIMPLE_ATTRIBUTE(adv_channel_map_fops
, adv_channel_map_get
,
971 adv_channel_map_set
, "%llu\n");
973 static int adv_min_interval_set(void *data
, u64 val
)
975 struct hci_dev
*hdev
= data
;
977 if (val
< 0x0020 || val
> 0x4000 || val
> hdev
->le_adv_max_interval
)
981 hdev
->le_adv_min_interval
= val
;
982 hci_dev_unlock(hdev
);
987 static int adv_min_interval_get(void *data
, u64
*val
)
989 struct hci_dev
*hdev
= data
;
992 *val
= hdev
->le_adv_min_interval
;
993 hci_dev_unlock(hdev
);
998 DEFINE_SIMPLE_ATTRIBUTE(adv_min_interval_fops
, adv_min_interval_get
,
999 adv_min_interval_set
, "%llu\n");
1001 static int adv_max_interval_set(void *data
, u64 val
)
1003 struct hci_dev
*hdev
= data
;
1005 if (val
< 0x0020 || val
> 0x4000 || val
< hdev
->le_adv_min_interval
)
1009 hdev
->le_adv_max_interval
= val
;
1010 hci_dev_unlock(hdev
);
1015 static int adv_max_interval_get(void *data
, u64
*val
)
1017 struct hci_dev
*hdev
= data
;
1020 *val
= hdev
->le_adv_max_interval
;
1021 hci_dev_unlock(hdev
);
1026 DEFINE_SIMPLE_ATTRIBUTE(adv_max_interval_fops
, adv_max_interval_get
,
1027 adv_max_interval_set
, "%llu\n");
1029 static int device_list_show(struct seq_file
*f
, void *ptr
)
1031 struct hci_dev
*hdev
= f
->private;
1032 struct hci_conn_params
*p
;
1035 list_for_each_entry(p
, &hdev
->le_conn_params
, list
) {
1036 seq_printf(f
, "%pMR %u %u\n", &p
->addr
, p
->addr_type
,
1039 hci_dev_unlock(hdev
);
1044 static int device_list_open(struct inode
*inode
, struct file
*file
)
1046 return single_open(file
, device_list_show
, inode
->i_private
);
1049 static const struct file_operations device_list_fops
= {
1050 .open
= device_list_open
,
1052 .llseek
= seq_lseek
,
1053 .release
= single_release
,
1056 /* ---- HCI requests ---- */
1058 static void hci_req_sync_complete(struct hci_dev
*hdev
, u8 result
)
1060 BT_DBG("%s result 0x%2.2x", hdev
->name
, result
);
1062 if (hdev
->req_status
== HCI_REQ_PEND
) {
1063 hdev
->req_result
= result
;
1064 hdev
->req_status
= HCI_REQ_DONE
;
1065 wake_up_interruptible(&hdev
->req_wait_q
);
1069 static void hci_req_cancel(struct hci_dev
*hdev
, int err
)
1071 BT_DBG("%s err 0x%2.2x", hdev
->name
, err
);
1073 if (hdev
->req_status
== HCI_REQ_PEND
) {
1074 hdev
->req_result
= err
;
1075 hdev
->req_status
= HCI_REQ_CANCELED
;
1076 wake_up_interruptible(&hdev
->req_wait_q
);
1080 static struct sk_buff
*hci_get_cmd_complete(struct hci_dev
*hdev
, u16 opcode
,
1083 struct hci_ev_cmd_complete
*ev
;
1084 struct hci_event_hdr
*hdr
;
1085 struct sk_buff
*skb
;
1089 skb
= hdev
->recv_evt
;
1090 hdev
->recv_evt
= NULL
;
1092 hci_dev_unlock(hdev
);
1095 return ERR_PTR(-ENODATA
);
1097 if (skb
->len
< sizeof(*hdr
)) {
1098 BT_ERR("Too short HCI event");
1102 hdr
= (void *) skb
->data
;
1103 skb_pull(skb
, HCI_EVENT_HDR_SIZE
);
1106 if (hdr
->evt
!= event
)
1111 if (hdr
->evt
!= HCI_EV_CMD_COMPLETE
) {
1112 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr
->evt
);
1116 if (skb
->len
< sizeof(*ev
)) {
1117 BT_ERR("Too short cmd_complete event");
1121 ev
= (void *) skb
->data
;
1122 skb_pull(skb
, sizeof(*ev
));
1124 if (opcode
== __le16_to_cpu(ev
->opcode
))
1127 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode
,
1128 __le16_to_cpu(ev
->opcode
));
1132 return ERR_PTR(-ENODATA
);
1135 struct sk_buff
*__hci_cmd_sync_ev(struct hci_dev
*hdev
, u16 opcode
, u32 plen
,
1136 const void *param
, u8 event
, u32 timeout
)
1138 DECLARE_WAITQUEUE(wait
, current
);
1139 struct hci_request req
;
1142 BT_DBG("%s", hdev
->name
);
1144 hci_req_init(&req
, hdev
);
1146 hci_req_add_ev(&req
, opcode
, plen
, param
, event
);
1148 hdev
->req_status
= HCI_REQ_PEND
;
1150 err
= hci_req_run(&req
, hci_req_sync_complete
);
1152 return ERR_PTR(err
);
1154 add_wait_queue(&hdev
->req_wait_q
, &wait
);
1155 set_current_state(TASK_INTERRUPTIBLE
);
1157 schedule_timeout(timeout
);
1159 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
1161 if (signal_pending(current
))
1162 return ERR_PTR(-EINTR
);
1164 switch (hdev
->req_status
) {
1166 err
= -bt_to_errno(hdev
->req_result
);
1169 case HCI_REQ_CANCELED
:
1170 err
= -hdev
->req_result
;
1178 hdev
->req_status
= hdev
->req_result
= 0;
1180 BT_DBG("%s end: err %d", hdev
->name
, err
);
1183 return ERR_PTR(err
);
1185 return hci_get_cmd_complete(hdev
, opcode
, event
);
1187 EXPORT_SYMBOL(__hci_cmd_sync_ev
);
1189 struct sk_buff
*__hci_cmd_sync(struct hci_dev
*hdev
, u16 opcode
, u32 plen
,
1190 const void *param
, u32 timeout
)
1192 return __hci_cmd_sync_ev(hdev
, opcode
, plen
, param
, 0, timeout
);
1194 EXPORT_SYMBOL(__hci_cmd_sync
);
1196 /* Execute request and wait for completion. */
1197 static int __hci_req_sync(struct hci_dev
*hdev
,
1198 void (*func
)(struct hci_request
*req
,
1200 unsigned long opt
, __u32 timeout
)
1202 struct hci_request req
;
1203 DECLARE_WAITQUEUE(wait
, current
);
1206 BT_DBG("%s start", hdev
->name
);
1208 hci_req_init(&req
, hdev
);
1210 hdev
->req_status
= HCI_REQ_PEND
;
1214 err
= hci_req_run(&req
, hci_req_sync_complete
);
1216 hdev
->req_status
= 0;
1218 /* ENODATA means the HCI request command queue is empty.
1219 * This can happen when a request with conditionals doesn't
1220 * trigger any commands to be sent. This is normal behavior
1221 * and should not trigger an error return.
1223 if (err
== -ENODATA
)
1229 add_wait_queue(&hdev
->req_wait_q
, &wait
);
1230 set_current_state(TASK_INTERRUPTIBLE
);
1232 schedule_timeout(timeout
);
1234 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
1236 if (signal_pending(current
))
1239 switch (hdev
->req_status
) {
1241 err
= -bt_to_errno(hdev
->req_result
);
1244 case HCI_REQ_CANCELED
:
1245 err
= -hdev
->req_result
;
1253 hdev
->req_status
= hdev
->req_result
= 0;
1255 BT_DBG("%s end: err %d", hdev
->name
, err
);
1260 static int hci_req_sync(struct hci_dev
*hdev
,
1261 void (*req
)(struct hci_request
*req
,
1263 unsigned long opt
, __u32 timeout
)
1267 if (!test_bit(HCI_UP
, &hdev
->flags
))
1270 /* Serialize all requests */
1272 ret
= __hci_req_sync(hdev
, req
, opt
, timeout
);
1273 hci_req_unlock(hdev
);
1278 static void hci_reset_req(struct hci_request
*req
, unsigned long opt
)
1280 BT_DBG("%s %ld", req
->hdev
->name
, opt
);
1283 set_bit(HCI_RESET
, &req
->hdev
->flags
);
1284 hci_req_add(req
, HCI_OP_RESET
, 0, NULL
);
1287 static void bredr_init(struct hci_request
*req
)
1289 req
->hdev
->flow_ctl_mode
= HCI_FLOW_CTL_MODE_PACKET_BASED
;
1291 /* Read Local Supported Features */
1292 hci_req_add(req
, HCI_OP_READ_LOCAL_FEATURES
, 0, NULL
);
1294 /* Read Local Version */
1295 hci_req_add(req
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
1297 /* Read BD Address */
1298 hci_req_add(req
, HCI_OP_READ_BD_ADDR
, 0, NULL
);
1301 static void amp_init(struct hci_request
*req
)
1303 req
->hdev
->flow_ctl_mode
= HCI_FLOW_CTL_MODE_BLOCK_BASED
;
1305 /* Read Local Version */
1306 hci_req_add(req
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
1308 /* Read Local Supported Commands */
1309 hci_req_add(req
, HCI_OP_READ_LOCAL_COMMANDS
, 0, NULL
);
1311 /* Read Local Supported Features */
1312 hci_req_add(req
, HCI_OP_READ_LOCAL_FEATURES
, 0, NULL
);
1314 /* Read Local AMP Info */
1315 hci_req_add(req
, HCI_OP_READ_LOCAL_AMP_INFO
, 0, NULL
);
1317 /* Read Data Blk size */
1318 hci_req_add(req
, HCI_OP_READ_DATA_BLOCK_SIZE
, 0, NULL
);
1320 /* Read Flow Control Mode */
1321 hci_req_add(req
, HCI_OP_READ_FLOW_CONTROL_MODE
, 0, NULL
);
1323 /* Read Location Data */
1324 hci_req_add(req
, HCI_OP_READ_LOCATION_DATA
, 0, NULL
);
1327 static void hci_init1_req(struct hci_request
*req
, unsigned long opt
)
1329 struct hci_dev
*hdev
= req
->hdev
;
1331 BT_DBG("%s %ld", hdev
->name
, opt
);
1334 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
))
1335 hci_reset_req(req
, 0);
1337 switch (hdev
->dev_type
) {
1347 BT_ERR("Unknown device type %d", hdev
->dev_type
);
1352 static void bredr_setup(struct hci_request
*req
)
1354 struct hci_dev
*hdev
= req
->hdev
;
1359 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
1360 hci_req_add(req
, HCI_OP_READ_BUFFER_SIZE
, 0, NULL
);
1362 /* Read Class of Device */
1363 hci_req_add(req
, HCI_OP_READ_CLASS_OF_DEV
, 0, NULL
);
1365 /* Read Local Name */
1366 hci_req_add(req
, HCI_OP_READ_LOCAL_NAME
, 0, NULL
);
1368 /* Read Voice Setting */
1369 hci_req_add(req
, HCI_OP_READ_VOICE_SETTING
, 0, NULL
);
1371 /* Read Number of Supported IAC */
1372 hci_req_add(req
, HCI_OP_READ_NUM_SUPPORTED_IAC
, 0, NULL
);
1374 /* Read Current IAC LAP */
1375 hci_req_add(req
, HCI_OP_READ_CURRENT_IAC_LAP
, 0, NULL
);
1377 /* Clear Event Filters */
1378 flt_type
= HCI_FLT_CLEAR_ALL
;
1379 hci_req_add(req
, HCI_OP_SET_EVENT_FLT
, 1, &flt_type
);
1381 /* Connection accept timeout ~20 secs */
1382 param
= cpu_to_le16(0x7d00);
1383 hci_req_add(req
, HCI_OP_WRITE_CA_TIMEOUT
, 2, ¶m
);
1385 /* AVM Berlin (31), aka "BlueFRITZ!", reports version 1.2,
1386 * but it does not support page scan related HCI commands.
1388 if (hdev
->manufacturer
!= 31 && hdev
->hci_ver
> BLUETOOTH_VER_1_1
) {
1389 hci_req_add(req
, HCI_OP_READ_PAGE_SCAN_ACTIVITY
, 0, NULL
);
1390 hci_req_add(req
, HCI_OP_READ_PAGE_SCAN_TYPE
, 0, NULL
);
1394 static void le_setup(struct hci_request
*req
)
1396 struct hci_dev
*hdev
= req
->hdev
;
1398 /* Read LE Buffer Size */
1399 hci_req_add(req
, HCI_OP_LE_READ_BUFFER_SIZE
, 0, NULL
);
1401 /* Read LE Local Supported Features */
1402 hci_req_add(req
, HCI_OP_LE_READ_LOCAL_FEATURES
, 0, NULL
);
1404 /* Read LE Supported States */
1405 hci_req_add(req
, HCI_OP_LE_READ_SUPPORTED_STATES
, 0, NULL
);
1407 /* Read LE White List Size */
1408 hci_req_add(req
, HCI_OP_LE_READ_WHITE_LIST_SIZE
, 0, NULL
);
1410 /* Clear LE White List */
1411 hci_req_add(req
, HCI_OP_LE_CLEAR_WHITE_LIST
, 0, NULL
);
1413 /* LE-only controllers have LE implicitly enabled */
1414 if (!lmp_bredr_capable(hdev
))
1415 set_bit(HCI_LE_ENABLED
, &hdev
->dev_flags
);
1418 static u8
hci_get_inquiry_mode(struct hci_dev
*hdev
)
1420 if (lmp_ext_inq_capable(hdev
))
1423 if (lmp_inq_rssi_capable(hdev
))
1426 if (hdev
->manufacturer
== 11 && hdev
->hci_rev
== 0x00 &&
1427 hdev
->lmp_subver
== 0x0757)
1430 if (hdev
->manufacturer
== 15) {
1431 if (hdev
->hci_rev
== 0x03 && hdev
->lmp_subver
== 0x6963)
1433 if (hdev
->hci_rev
== 0x09 && hdev
->lmp_subver
== 0x6963)
1435 if (hdev
->hci_rev
== 0x00 && hdev
->lmp_subver
== 0x6965)
1439 if (hdev
->manufacturer
== 31 && hdev
->hci_rev
== 0x2005 &&
1440 hdev
->lmp_subver
== 0x1805)
1446 static void hci_setup_inquiry_mode(struct hci_request
*req
)
1450 mode
= hci_get_inquiry_mode(req
->hdev
);
1452 hci_req_add(req
, HCI_OP_WRITE_INQUIRY_MODE
, 1, &mode
);
1455 static void hci_setup_event_mask(struct hci_request
*req
)
1457 struct hci_dev
*hdev
= req
->hdev
;
1459 /* The second byte is 0xff instead of 0x9f (two reserved bits
1460 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
1461 * command otherwise.
1463 u8 events
[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
1465 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
1466 * any event mask for pre 1.2 devices.
1468 if (hdev
->hci_ver
< BLUETOOTH_VER_1_2
)
1471 if (lmp_bredr_capable(hdev
)) {
1472 events
[4] |= 0x01; /* Flow Specification Complete */
1473 events
[4] |= 0x02; /* Inquiry Result with RSSI */
1474 events
[4] |= 0x04; /* Read Remote Extended Features Complete */
1475 events
[5] |= 0x08; /* Synchronous Connection Complete */
1476 events
[5] |= 0x10; /* Synchronous Connection Changed */
1478 /* Use a different default for LE-only devices */
1479 memset(events
, 0, sizeof(events
));
1480 events
[0] |= 0x10; /* Disconnection Complete */
1481 events
[1] |= 0x08; /* Read Remote Version Information Complete */
1482 events
[1] |= 0x20; /* Command Complete */
1483 events
[1] |= 0x40; /* Command Status */
1484 events
[1] |= 0x80; /* Hardware Error */
1485 events
[2] |= 0x04; /* Number of Completed Packets */
1486 events
[3] |= 0x02; /* Data Buffer Overflow */
1488 if (hdev
->le_features
[0] & HCI_LE_ENCRYPTION
) {
1489 events
[0] |= 0x80; /* Encryption Change */
1490 events
[5] |= 0x80; /* Encryption Key Refresh Complete */
1494 if (lmp_inq_rssi_capable(hdev
))
1495 events
[4] |= 0x02; /* Inquiry Result with RSSI */
1497 if (lmp_sniffsubr_capable(hdev
))
1498 events
[5] |= 0x20; /* Sniff Subrating */
1500 if (lmp_pause_enc_capable(hdev
))
1501 events
[5] |= 0x80; /* Encryption Key Refresh Complete */
1503 if (lmp_ext_inq_capable(hdev
))
1504 events
[5] |= 0x40; /* Extended Inquiry Result */
1506 if (lmp_no_flush_capable(hdev
))
1507 events
[7] |= 0x01; /* Enhanced Flush Complete */
1509 if (lmp_lsto_capable(hdev
))
1510 events
[6] |= 0x80; /* Link Supervision Timeout Changed */
1512 if (lmp_ssp_capable(hdev
)) {
1513 events
[6] |= 0x01; /* IO Capability Request */
1514 events
[6] |= 0x02; /* IO Capability Response */
1515 events
[6] |= 0x04; /* User Confirmation Request */
1516 events
[6] |= 0x08; /* User Passkey Request */
1517 events
[6] |= 0x10; /* Remote OOB Data Request */
1518 events
[6] |= 0x20; /* Simple Pairing Complete */
1519 events
[7] |= 0x04; /* User Passkey Notification */
1520 events
[7] |= 0x08; /* Keypress Notification */
1521 events
[7] |= 0x10; /* Remote Host Supported
1522 * Features Notification
1526 if (lmp_le_capable(hdev
))
1527 events
[7] |= 0x20; /* LE Meta-Event */
1529 hci_req_add(req
, HCI_OP_SET_EVENT_MASK
, sizeof(events
), events
);
1532 static void hci_init2_req(struct hci_request
*req
, unsigned long opt
)
1534 struct hci_dev
*hdev
= req
->hdev
;
1536 if (lmp_bredr_capable(hdev
))
1539 clear_bit(HCI_BREDR_ENABLED
, &hdev
->dev_flags
);
1541 if (lmp_le_capable(hdev
))
1544 /* AVM Berlin (31), aka "BlueFRITZ!", doesn't support the read
1545 * local supported commands HCI command.
1547 if (hdev
->manufacturer
!= 31 && hdev
->hci_ver
> BLUETOOTH_VER_1_1
)
1548 hci_req_add(req
, HCI_OP_READ_LOCAL_COMMANDS
, 0, NULL
);
1550 if (lmp_ssp_capable(hdev
)) {
1551 /* When SSP is available, then the host features page
1552 * should also be available as well. However some
1553 * controllers list the max_page as 0 as long as SSP
1554 * has not been enabled. To achieve proper debugging
1555 * output, force the minimum max_page to 1 at least.
1557 hdev
->max_page
= 0x01;
1559 if (test_bit(HCI_SSP_ENABLED
, &hdev
->dev_flags
)) {
1561 hci_req_add(req
, HCI_OP_WRITE_SSP_MODE
,
1562 sizeof(mode
), &mode
);
1564 struct hci_cp_write_eir cp
;
1566 memset(hdev
->eir
, 0, sizeof(hdev
->eir
));
1567 memset(&cp
, 0, sizeof(cp
));
1569 hci_req_add(req
, HCI_OP_WRITE_EIR
, sizeof(cp
), &cp
);
1573 if (lmp_inq_rssi_capable(hdev
))
1574 hci_setup_inquiry_mode(req
);
1576 if (lmp_inq_tx_pwr_capable(hdev
))
1577 hci_req_add(req
, HCI_OP_READ_INQ_RSP_TX_POWER
, 0, NULL
);
1579 if (lmp_ext_feat_capable(hdev
)) {
1580 struct hci_cp_read_local_ext_features cp
;
1583 hci_req_add(req
, HCI_OP_READ_LOCAL_EXT_FEATURES
,
1587 if (test_bit(HCI_LINK_SECURITY
, &hdev
->dev_flags
)) {
1589 hci_req_add(req
, HCI_OP_WRITE_AUTH_ENABLE
, sizeof(enable
),
1594 static void hci_setup_link_policy(struct hci_request
*req
)
1596 struct hci_dev
*hdev
= req
->hdev
;
1597 struct hci_cp_write_def_link_policy cp
;
1598 u16 link_policy
= 0;
1600 if (lmp_rswitch_capable(hdev
))
1601 link_policy
|= HCI_LP_RSWITCH
;
1602 if (lmp_hold_capable(hdev
))
1603 link_policy
|= HCI_LP_HOLD
;
1604 if (lmp_sniff_capable(hdev
))
1605 link_policy
|= HCI_LP_SNIFF
;
1606 if (lmp_park_capable(hdev
))
1607 link_policy
|= HCI_LP_PARK
;
1609 cp
.policy
= cpu_to_le16(link_policy
);
1610 hci_req_add(req
, HCI_OP_WRITE_DEF_LINK_POLICY
, sizeof(cp
), &cp
);
1613 static void hci_set_le_support(struct hci_request
*req
)
1615 struct hci_dev
*hdev
= req
->hdev
;
1616 struct hci_cp_write_le_host_supported cp
;
1618 /* LE-only devices do not support explicit enablement */
1619 if (!lmp_bredr_capable(hdev
))
1622 memset(&cp
, 0, sizeof(cp
));
1624 if (test_bit(HCI_LE_ENABLED
, &hdev
->dev_flags
)) {
1629 if (cp
.le
!= lmp_host_le_capable(hdev
))
1630 hci_req_add(req
, HCI_OP_WRITE_LE_HOST_SUPPORTED
, sizeof(cp
),
1634 static void hci_set_event_mask_page_2(struct hci_request
*req
)
1636 struct hci_dev
*hdev
= req
->hdev
;
1637 u8 events
[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
1639 /* If Connectionless Slave Broadcast master role is supported
1640 * enable all necessary events for it.
1642 if (lmp_csb_master_capable(hdev
)) {
1643 events
[1] |= 0x40; /* Triggered Clock Capture */
1644 events
[1] |= 0x80; /* Synchronization Train Complete */
1645 events
[2] |= 0x10; /* Slave Page Response Timeout */
1646 events
[2] |= 0x20; /* CSB Channel Map Change */
1649 /* If Connectionless Slave Broadcast slave role is supported
1650 * enable all necessary events for it.
1652 if (lmp_csb_slave_capable(hdev
)) {
1653 events
[2] |= 0x01; /* Synchronization Train Received */
1654 events
[2] |= 0x02; /* CSB Receive */
1655 events
[2] |= 0x04; /* CSB Timeout */
1656 events
[2] |= 0x08; /* Truncated Page Complete */
1659 /* Enable Authenticated Payload Timeout Expired event if supported */
1660 if (lmp_ping_capable(hdev
) || hdev
->le_features
[0] & HCI_LE_PING
)
1663 hci_req_add(req
, HCI_OP_SET_EVENT_MASK_PAGE_2
, sizeof(events
), events
);
1666 static void hci_init3_req(struct hci_request
*req
, unsigned long opt
)
1668 struct hci_dev
*hdev
= req
->hdev
;
1671 hci_setup_event_mask(req
);
1673 /* Some Broadcom based Bluetooth controllers do not support the
1674 * Delete Stored Link Key command. They are clearly indicating its
1675 * absence in the bit mask of supported commands.
1677 * Check the supported commands and only if the the command is marked
1678 * as supported send it. If not supported assume that the controller
1679 * does not have actual support for stored link keys which makes this
1680 * command redundant anyway.
1682 * Some controllers indicate that they support handling deleting
1683 * stored link keys, but they don't. The quirk lets a driver
1684 * just disable this command.
1686 if (hdev
->commands
[6] & 0x80 &&
1687 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY
, &hdev
->quirks
)) {
1688 struct hci_cp_delete_stored_link_key cp
;
1690 bacpy(&cp
.bdaddr
, BDADDR_ANY
);
1691 cp
.delete_all
= 0x01;
1692 hci_req_add(req
, HCI_OP_DELETE_STORED_LINK_KEY
,
1696 if (hdev
->commands
[5] & 0x10)
1697 hci_setup_link_policy(req
);
1699 if (lmp_le_capable(hdev
)) {
1702 memset(events
, 0, sizeof(events
));
1705 if (hdev
->le_features
[0] & HCI_LE_ENCRYPTION
)
1706 events
[0] |= 0x10; /* LE Long Term Key Request */
1708 /* If controller supports the Connection Parameters Request
1709 * Link Layer Procedure, enable the corresponding event.
1711 if (hdev
->le_features
[0] & HCI_LE_CONN_PARAM_REQ_PROC
)
1712 events
[0] |= 0x20; /* LE Remote Connection
1716 hci_req_add(req
, HCI_OP_LE_SET_EVENT_MASK
, sizeof(events
),
1719 if (hdev
->commands
[25] & 0x40) {
1720 /* Read LE Advertising Channel TX Power */
1721 hci_req_add(req
, HCI_OP_LE_READ_ADV_TX_POWER
, 0, NULL
);
1724 hci_set_le_support(req
);
1727 /* Read features beyond page 1 if available */
1728 for (p
= 2; p
< HCI_MAX_PAGES
&& p
<= hdev
->max_page
; p
++) {
1729 struct hci_cp_read_local_ext_features cp
;
1732 hci_req_add(req
, HCI_OP_READ_LOCAL_EXT_FEATURES
,
1737 static void hci_init4_req(struct hci_request
*req
, unsigned long opt
)
1739 struct hci_dev
*hdev
= req
->hdev
;
1741 /* Set event mask page 2 if the HCI command for it is supported */
1742 if (hdev
->commands
[22] & 0x04)
1743 hci_set_event_mask_page_2(req
);
1745 /* Read local codec list if the HCI command is supported */
1746 if (hdev
->commands
[29] & 0x20)
1747 hci_req_add(req
, HCI_OP_READ_LOCAL_CODECS
, 0, NULL
);
1749 /* Get MWS transport configuration if the HCI command is supported */
1750 if (hdev
->commands
[30] & 0x08)
1751 hci_req_add(req
, HCI_OP_GET_MWS_TRANSPORT_CONFIG
, 0, NULL
);
1753 /* Check for Synchronization Train support */
1754 if (lmp_sync_train_capable(hdev
))
1755 hci_req_add(req
, HCI_OP_READ_SYNC_TRAIN_PARAMS
, 0, NULL
);
1757 /* Enable Secure Connections if supported and configured */
1758 if ((lmp_sc_capable(hdev
) ||
1759 test_bit(HCI_FORCE_SC
, &hdev
->dbg_flags
)) &&
1760 test_bit(HCI_SC_ENABLED
, &hdev
->dev_flags
)) {
1762 hci_req_add(req
, HCI_OP_WRITE_SC_SUPPORT
,
1763 sizeof(support
), &support
);
1767 static int __hci_init(struct hci_dev
*hdev
)
1771 err
= __hci_req_sync(hdev
, hci_init1_req
, 0, HCI_INIT_TIMEOUT
);
1775 /* The Device Under Test (DUT) mode is special and available for
1776 * all controller types. So just create it early on.
1778 if (test_bit(HCI_SETUP
, &hdev
->dev_flags
)) {
1779 debugfs_create_file("dut_mode", 0644, hdev
->debugfs
, hdev
,
1783 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
1784 * BR/EDR/LE type controllers. AMP controllers only need the
1787 if (hdev
->dev_type
!= HCI_BREDR
)
1790 err
= __hci_req_sync(hdev
, hci_init2_req
, 0, HCI_INIT_TIMEOUT
);
1794 err
= __hci_req_sync(hdev
, hci_init3_req
, 0, HCI_INIT_TIMEOUT
);
1798 err
= __hci_req_sync(hdev
, hci_init4_req
, 0, HCI_INIT_TIMEOUT
);
1802 /* Only create debugfs entries during the initial setup
1803 * phase and not every time the controller gets powered on.
1805 if (!test_bit(HCI_SETUP
, &hdev
->dev_flags
))
1808 debugfs_create_file("features", 0444, hdev
->debugfs
, hdev
,
1810 debugfs_create_u16("manufacturer", 0444, hdev
->debugfs
,
1811 &hdev
->manufacturer
);
1812 debugfs_create_u8("hci_version", 0444, hdev
->debugfs
, &hdev
->hci_ver
);
1813 debugfs_create_u16("hci_revision", 0444, hdev
->debugfs
, &hdev
->hci_rev
);
1814 debugfs_create_file("blacklist", 0444, hdev
->debugfs
, hdev
,
1816 debugfs_create_file("whitelist", 0444, hdev
->debugfs
, hdev
,
1818 debugfs_create_file("uuids", 0444, hdev
->debugfs
, hdev
, &uuids_fops
);
1820 debugfs_create_file("conn_info_min_age", 0644, hdev
->debugfs
, hdev
,
1821 &conn_info_min_age_fops
);
1822 debugfs_create_file("conn_info_max_age", 0644, hdev
->debugfs
, hdev
,
1823 &conn_info_max_age_fops
);
1825 if (lmp_bredr_capable(hdev
)) {
1826 debugfs_create_file("inquiry_cache", 0444, hdev
->debugfs
,
1827 hdev
, &inquiry_cache_fops
);
1828 debugfs_create_file("link_keys", 0400, hdev
->debugfs
,
1829 hdev
, &link_keys_fops
);
1830 debugfs_create_file("dev_class", 0444, hdev
->debugfs
,
1831 hdev
, &dev_class_fops
);
1832 debugfs_create_file("voice_setting", 0444, hdev
->debugfs
,
1833 hdev
, &voice_setting_fops
);
1836 if (lmp_ssp_capable(hdev
)) {
1837 debugfs_create_file("auto_accept_delay", 0644, hdev
->debugfs
,
1838 hdev
, &auto_accept_delay_fops
);
1839 debugfs_create_file("force_sc_support", 0644, hdev
->debugfs
,
1840 hdev
, &force_sc_support_fops
);
1841 debugfs_create_file("sc_only_mode", 0444, hdev
->debugfs
,
1842 hdev
, &sc_only_mode_fops
);
1845 if (lmp_sniff_capable(hdev
)) {
1846 debugfs_create_file("idle_timeout", 0644, hdev
->debugfs
,
1847 hdev
, &idle_timeout_fops
);
1848 debugfs_create_file("sniff_min_interval", 0644, hdev
->debugfs
,
1849 hdev
, &sniff_min_interval_fops
);
1850 debugfs_create_file("sniff_max_interval", 0644, hdev
->debugfs
,
1851 hdev
, &sniff_max_interval_fops
);
1854 if (lmp_le_capable(hdev
)) {
1855 debugfs_create_file("identity", 0400, hdev
->debugfs
,
1856 hdev
, &identity_fops
);
1857 debugfs_create_file("rpa_timeout", 0644, hdev
->debugfs
,
1858 hdev
, &rpa_timeout_fops
);
1859 debugfs_create_file("random_address", 0444, hdev
->debugfs
,
1860 hdev
, &random_address_fops
);
1861 debugfs_create_file("static_address", 0444, hdev
->debugfs
,
1862 hdev
, &static_address_fops
);
1864 /* For controllers with a public address, provide a debug
1865 * option to force the usage of the configured static
1866 * address. By default the public address is used.
1868 if (bacmp(&hdev
->bdaddr
, BDADDR_ANY
))
1869 debugfs_create_file("force_static_address", 0644,
1870 hdev
->debugfs
, hdev
,
1871 &force_static_address_fops
);
1873 debugfs_create_u8("white_list_size", 0444, hdev
->debugfs
,
1874 &hdev
->le_white_list_size
);
1875 debugfs_create_file("white_list", 0444, hdev
->debugfs
, hdev
,
1877 debugfs_create_file("identity_resolving_keys", 0400,
1878 hdev
->debugfs
, hdev
,
1879 &identity_resolving_keys_fops
);
1880 debugfs_create_file("long_term_keys", 0400, hdev
->debugfs
,
1881 hdev
, &long_term_keys_fops
);
1882 debugfs_create_file("conn_min_interval", 0644, hdev
->debugfs
,
1883 hdev
, &conn_min_interval_fops
);
1884 debugfs_create_file("conn_max_interval", 0644, hdev
->debugfs
,
1885 hdev
, &conn_max_interval_fops
);
1886 debugfs_create_file("conn_latency", 0644, hdev
->debugfs
,
1887 hdev
, &conn_latency_fops
);
1888 debugfs_create_file("supervision_timeout", 0644, hdev
->debugfs
,
1889 hdev
, &supervision_timeout_fops
);
1890 debugfs_create_file("adv_channel_map", 0644, hdev
->debugfs
,
1891 hdev
, &adv_channel_map_fops
);
1892 debugfs_create_file("adv_min_interval", 0644, hdev
->debugfs
,
1893 hdev
, &adv_min_interval_fops
);
1894 debugfs_create_file("adv_max_interval", 0644, hdev
->debugfs
,
1895 hdev
, &adv_max_interval_fops
);
1896 debugfs_create_file("device_list", 0444, hdev
->debugfs
, hdev
,
1898 debugfs_create_u16("discov_interleaved_timeout", 0644,
1900 &hdev
->discov_interleaved_timeout
);
1906 static void hci_init0_req(struct hci_request
*req
, unsigned long opt
)
1908 struct hci_dev
*hdev
= req
->hdev
;
1910 BT_DBG("%s %ld", hdev
->name
, opt
);
1913 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
))
1914 hci_reset_req(req
, 0);
1916 /* Read Local Version */
1917 hci_req_add(req
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
1919 /* Read BD Address */
1920 if (hdev
->set_bdaddr
)
1921 hci_req_add(req
, HCI_OP_READ_BD_ADDR
, 0, NULL
);
1924 static int __hci_unconf_init(struct hci_dev
*hdev
)
1928 if (test_bit(HCI_QUIRK_RAW_DEVICE
, &hdev
->quirks
))
1931 err
= __hci_req_sync(hdev
, hci_init0_req
, 0, HCI_INIT_TIMEOUT
);
1938 static void hci_scan_req(struct hci_request
*req
, unsigned long opt
)
1942 BT_DBG("%s %x", req
->hdev
->name
, scan
);
1944 /* Inquiry and Page scans */
1945 hci_req_add(req
, HCI_OP_WRITE_SCAN_ENABLE
, 1, &scan
);
1948 static void hci_auth_req(struct hci_request
*req
, unsigned long opt
)
1952 BT_DBG("%s %x", req
->hdev
->name
, auth
);
1954 /* Authentication */
1955 hci_req_add(req
, HCI_OP_WRITE_AUTH_ENABLE
, 1, &auth
);
1958 static void hci_encrypt_req(struct hci_request
*req
, unsigned long opt
)
1962 BT_DBG("%s %x", req
->hdev
->name
, encrypt
);
1965 hci_req_add(req
, HCI_OP_WRITE_ENCRYPT_MODE
, 1, &encrypt
);
1968 static void hci_linkpol_req(struct hci_request
*req
, unsigned long opt
)
1970 __le16 policy
= cpu_to_le16(opt
);
1972 BT_DBG("%s %x", req
->hdev
->name
, policy
);
1974 /* Default link policy */
1975 hci_req_add(req
, HCI_OP_WRITE_DEF_LINK_POLICY
, 2, &policy
);
1978 /* Get HCI device by index.
1979 * Device is held on return. */
1980 struct hci_dev
*hci_dev_get(int index
)
1982 struct hci_dev
*hdev
= NULL
, *d
;
1984 BT_DBG("%d", index
);
1989 read_lock(&hci_dev_list_lock
);
1990 list_for_each_entry(d
, &hci_dev_list
, list
) {
1991 if (d
->id
== index
) {
1992 hdev
= hci_dev_hold(d
);
1996 read_unlock(&hci_dev_list_lock
);
2000 /* ---- Inquiry support ---- */
2002 bool hci_discovery_active(struct hci_dev
*hdev
)
2004 struct discovery_state
*discov
= &hdev
->discovery
;
2006 switch (discov
->state
) {
2007 case DISCOVERY_FINDING
:
2008 case DISCOVERY_RESOLVING
:
2016 void hci_discovery_set_state(struct hci_dev
*hdev
, int state
)
2018 int old_state
= hdev
->discovery
.state
;
2020 BT_DBG("%s state %u -> %u", hdev
->name
, hdev
->discovery
.state
, state
);
2022 if (old_state
== state
)
2025 hdev
->discovery
.state
= state
;
2028 case DISCOVERY_STOPPED
:
2029 hci_update_background_scan(hdev
);
2031 if (old_state
!= DISCOVERY_STARTING
)
2032 mgmt_discovering(hdev
, 0);
2034 case DISCOVERY_STARTING
:
2036 case DISCOVERY_FINDING
:
2037 mgmt_discovering(hdev
, 1);
2039 case DISCOVERY_RESOLVING
:
2041 case DISCOVERY_STOPPING
:
2046 void hci_inquiry_cache_flush(struct hci_dev
*hdev
)
2048 struct discovery_state
*cache
= &hdev
->discovery
;
2049 struct inquiry_entry
*p
, *n
;
2051 list_for_each_entry_safe(p
, n
, &cache
->all
, all
) {
2056 INIT_LIST_HEAD(&cache
->unknown
);
2057 INIT_LIST_HEAD(&cache
->resolve
);
2060 struct inquiry_entry
*hci_inquiry_cache_lookup(struct hci_dev
*hdev
,
2063 struct discovery_state
*cache
= &hdev
->discovery
;
2064 struct inquiry_entry
*e
;
2066 BT_DBG("cache %p, %pMR", cache
, bdaddr
);
2068 list_for_each_entry(e
, &cache
->all
, all
) {
2069 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
2076 struct inquiry_entry
*hci_inquiry_cache_lookup_unknown(struct hci_dev
*hdev
,
2079 struct discovery_state
*cache
= &hdev
->discovery
;
2080 struct inquiry_entry
*e
;
2082 BT_DBG("cache %p, %pMR", cache
, bdaddr
);
2084 list_for_each_entry(e
, &cache
->unknown
, list
) {
2085 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
2092 struct inquiry_entry
*hci_inquiry_cache_lookup_resolve(struct hci_dev
*hdev
,
2096 struct discovery_state
*cache
= &hdev
->discovery
;
2097 struct inquiry_entry
*e
;
2099 BT_DBG("cache %p bdaddr %pMR state %d", cache
, bdaddr
, state
);
2101 list_for_each_entry(e
, &cache
->resolve
, list
) {
2102 if (!bacmp(bdaddr
, BDADDR_ANY
) && e
->name_state
== state
)
2104 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
2111 void hci_inquiry_cache_update_resolve(struct hci_dev
*hdev
,
2112 struct inquiry_entry
*ie
)
2114 struct discovery_state
*cache
= &hdev
->discovery
;
2115 struct list_head
*pos
= &cache
->resolve
;
2116 struct inquiry_entry
*p
;
2118 list_del(&ie
->list
);
2120 list_for_each_entry(p
, &cache
->resolve
, list
) {
2121 if (p
->name_state
!= NAME_PENDING
&&
2122 abs(p
->data
.rssi
) >= abs(ie
->data
.rssi
))
2127 list_add(&ie
->list
, pos
);
2130 u32
hci_inquiry_cache_update(struct hci_dev
*hdev
, struct inquiry_data
*data
,
2133 struct discovery_state
*cache
= &hdev
->discovery
;
2134 struct inquiry_entry
*ie
;
2137 BT_DBG("cache %p, %pMR", cache
, &data
->bdaddr
);
2139 hci_remove_remote_oob_data(hdev
, &data
->bdaddr
);
2141 if (!data
->ssp_mode
)
2142 flags
|= MGMT_DEV_FOUND_LEGACY_PAIRING
;
2144 ie
= hci_inquiry_cache_lookup(hdev
, &data
->bdaddr
);
2146 if (!ie
->data
.ssp_mode
)
2147 flags
|= MGMT_DEV_FOUND_LEGACY_PAIRING
;
2149 if (ie
->name_state
== NAME_NEEDED
&&
2150 data
->rssi
!= ie
->data
.rssi
) {
2151 ie
->data
.rssi
= data
->rssi
;
2152 hci_inquiry_cache_update_resolve(hdev
, ie
);
2158 /* Entry not in the cache. Add new one. */
2159 ie
= kzalloc(sizeof(*ie
), GFP_KERNEL
);
2161 flags
|= MGMT_DEV_FOUND_CONFIRM_NAME
;
2165 list_add(&ie
->all
, &cache
->all
);
2168 ie
->name_state
= NAME_KNOWN
;
2170 ie
->name_state
= NAME_NOT_KNOWN
;
2171 list_add(&ie
->list
, &cache
->unknown
);
2175 if (name_known
&& ie
->name_state
!= NAME_KNOWN
&&
2176 ie
->name_state
!= NAME_PENDING
) {
2177 ie
->name_state
= NAME_KNOWN
;
2178 list_del(&ie
->list
);
2181 memcpy(&ie
->data
, data
, sizeof(*data
));
2182 ie
->timestamp
= jiffies
;
2183 cache
->timestamp
= jiffies
;
2185 if (ie
->name_state
== NAME_NOT_KNOWN
)
2186 flags
|= MGMT_DEV_FOUND_CONFIRM_NAME
;
2192 static int inquiry_cache_dump(struct hci_dev
*hdev
, int num
, __u8
*buf
)
2194 struct discovery_state
*cache
= &hdev
->discovery
;
2195 struct inquiry_info
*info
= (struct inquiry_info
*) buf
;
2196 struct inquiry_entry
*e
;
2199 list_for_each_entry(e
, &cache
->all
, all
) {
2200 struct inquiry_data
*data
= &e
->data
;
2205 bacpy(&info
->bdaddr
, &data
->bdaddr
);
2206 info
->pscan_rep_mode
= data
->pscan_rep_mode
;
2207 info
->pscan_period_mode
= data
->pscan_period_mode
;
2208 info
->pscan_mode
= data
->pscan_mode
;
2209 memcpy(info
->dev_class
, data
->dev_class
, 3);
2210 info
->clock_offset
= data
->clock_offset
;
2216 BT_DBG("cache %p, copied %d", cache
, copied
);
2220 static void hci_inq_req(struct hci_request
*req
, unsigned long opt
)
2222 struct hci_inquiry_req
*ir
= (struct hci_inquiry_req
*) opt
;
2223 struct hci_dev
*hdev
= req
->hdev
;
2224 struct hci_cp_inquiry cp
;
2226 BT_DBG("%s", hdev
->name
);
2228 if (test_bit(HCI_INQUIRY
, &hdev
->flags
))
2232 memcpy(&cp
.lap
, &ir
->lap
, 3);
2233 cp
.length
= ir
->length
;
2234 cp
.num_rsp
= ir
->num_rsp
;
2235 hci_req_add(req
, HCI_OP_INQUIRY
, sizeof(cp
), &cp
);
2238 int hci_inquiry(void __user
*arg
)
2240 __u8 __user
*ptr
= arg
;
2241 struct hci_inquiry_req ir
;
2242 struct hci_dev
*hdev
;
2243 int err
= 0, do_inquiry
= 0, max_rsp
;
2247 if (copy_from_user(&ir
, ptr
, sizeof(ir
)))
2250 hdev
= hci_dev_get(ir
.dev_id
);
2254 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
2259 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
)) {
2264 if (hdev
->dev_type
!= HCI_BREDR
) {
2269 if (!test_bit(HCI_BREDR_ENABLED
, &hdev
->dev_flags
)) {
2275 if (inquiry_cache_age(hdev
) > INQUIRY_CACHE_AGE_MAX
||
2276 inquiry_cache_empty(hdev
) || ir
.flags
& IREQ_CACHE_FLUSH
) {
2277 hci_inquiry_cache_flush(hdev
);
2280 hci_dev_unlock(hdev
);
2282 timeo
= ir
.length
* msecs_to_jiffies(2000);
2285 err
= hci_req_sync(hdev
, hci_inq_req
, (unsigned long) &ir
,
2290 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
2291 * cleared). If it is interrupted by a signal, return -EINTR.
2293 if (wait_on_bit(&hdev
->flags
, HCI_INQUIRY
,
2294 TASK_INTERRUPTIBLE
))
2298 /* for unlimited number of responses we will use buffer with
2301 max_rsp
= (ir
.num_rsp
== 0) ? 255 : ir
.num_rsp
;
2303 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
2304 * copy it to the user space.
2306 buf
= kmalloc(sizeof(struct inquiry_info
) * max_rsp
, GFP_KERNEL
);
2313 ir
.num_rsp
= inquiry_cache_dump(hdev
, max_rsp
, buf
);
2314 hci_dev_unlock(hdev
);
2316 BT_DBG("num_rsp %d", ir
.num_rsp
);
2318 if (!copy_to_user(ptr
, &ir
, sizeof(ir
))) {
2320 if (copy_to_user(ptr
, buf
, sizeof(struct inquiry_info
) *
2333 static int hci_dev_do_open(struct hci_dev
*hdev
)
2337 BT_DBG("%s %p", hdev
->name
, hdev
);
2341 if (test_bit(HCI_UNREGISTER
, &hdev
->dev_flags
)) {
2346 if (!test_bit(HCI_SETUP
, &hdev
->dev_flags
) &&
2347 !test_bit(HCI_CONFIG
, &hdev
->dev_flags
)) {
2348 /* Check for rfkill but allow the HCI setup stage to
2349 * proceed (which in itself doesn't cause any RF activity).
2351 if (test_bit(HCI_RFKILLED
, &hdev
->dev_flags
)) {
2356 /* Check for valid public address or a configured static
2357 * random adddress, but let the HCI setup proceed to
2358 * be able to determine if there is a public address
2361 * In case of user channel usage, it is not important
2362 * if a public address or static random address is
2365 * This check is only valid for BR/EDR controllers
2366 * since AMP controllers do not have an address.
2368 if (!test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
) &&
2369 hdev
->dev_type
== HCI_BREDR
&&
2370 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
) &&
2371 !bacmp(&hdev
->static_addr
, BDADDR_ANY
)) {
2372 ret
= -EADDRNOTAVAIL
;
2377 if (test_bit(HCI_UP
, &hdev
->flags
)) {
2382 if (hdev
->open(hdev
)) {
2387 atomic_set(&hdev
->cmd_cnt
, 1);
2388 set_bit(HCI_INIT
, &hdev
->flags
);
2390 if (test_bit(HCI_SETUP
, &hdev
->dev_flags
)) {
2392 ret
= hdev
->setup(hdev
);
2394 /* The transport driver can set these quirks before
2395 * creating the HCI device or in its setup callback.
2397 * In case any of them is set, the controller has to
2398 * start up as unconfigured.
2400 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG
, &hdev
->quirks
) ||
2401 test_bit(HCI_QUIRK_INVALID_BDADDR
, &hdev
->quirks
))
2402 set_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
);
2404 /* For an unconfigured controller it is required to
2405 * read at least the version information provided by
2406 * the Read Local Version Information command.
2408 * If the set_bdaddr driver callback is provided, then
2409 * also the original Bluetooth public device address
2410 * will be read using the Read BD Address command.
2412 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
))
2413 ret
= __hci_unconf_init(hdev
);
2416 if (test_bit(HCI_CONFIG
, &hdev
->dev_flags
)) {
2417 /* If public address change is configured, ensure that
2418 * the address gets programmed. If the driver does not
2419 * support changing the public address, fail the power
2422 if (bacmp(&hdev
->public_addr
, BDADDR_ANY
) &&
2424 ret
= hdev
->set_bdaddr(hdev
, &hdev
->public_addr
);
2426 ret
= -EADDRNOTAVAIL
;
2430 if (!test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
) &&
2431 !test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
))
2432 ret
= __hci_init(hdev
);
2435 clear_bit(HCI_INIT
, &hdev
->flags
);
2439 set_bit(HCI_RPA_EXPIRED
, &hdev
->dev_flags
);
2440 set_bit(HCI_UP
, &hdev
->flags
);
2441 hci_notify(hdev
, HCI_DEV_UP
);
2442 if (!test_bit(HCI_SETUP
, &hdev
->dev_flags
) &&
2443 !test_bit(HCI_CONFIG
, &hdev
->dev_flags
) &&
2444 !test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
) &&
2445 !test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
) &&
2446 hdev
->dev_type
== HCI_BREDR
) {
2448 mgmt_powered(hdev
, 1);
2449 hci_dev_unlock(hdev
);
2452 /* Init failed, cleanup */
2453 flush_work(&hdev
->tx_work
);
2454 flush_work(&hdev
->cmd_work
);
2455 flush_work(&hdev
->rx_work
);
2457 skb_queue_purge(&hdev
->cmd_q
);
2458 skb_queue_purge(&hdev
->rx_q
);
2463 if (hdev
->sent_cmd
) {
2464 kfree_skb(hdev
->sent_cmd
);
2465 hdev
->sent_cmd
= NULL
;
2469 hdev
->flags
&= BIT(HCI_RAW
);
2473 hci_req_unlock(hdev
);
2477 /* ---- HCI ioctl helpers ---- */
2479 int hci_dev_open(__u16 dev
)
2481 struct hci_dev
*hdev
;
2484 hdev
= hci_dev_get(dev
);
2488 /* Devices that are marked as unconfigured can only be powered
2489 * up as user channel. Trying to bring them up as normal devices
2490 * will result into a failure. Only user channel operation is
2493 * When this function is called for a user channel, the flag
2494 * HCI_USER_CHANNEL will be set first before attempting to
2497 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
) &&
2498 !test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
2503 /* We need to ensure that no other power on/off work is pending
2504 * before proceeding to call hci_dev_do_open. This is
2505 * particularly important if the setup procedure has not yet
2508 if (test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
2509 cancel_delayed_work(&hdev
->power_off
);
2511 /* After this call it is guaranteed that the setup procedure
2512 * has finished. This means that error conditions like RFKILL
2513 * or no valid public or static random address apply.
2515 flush_workqueue(hdev
->req_workqueue
);
2517 /* For controllers not using the management interface and that
2518 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
2519 * so that pairing works for them. Once the management interface
2520 * is in use this bit will be cleared again and userspace has
2521 * to explicitly enable it.
2523 if (!test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
) &&
2524 !test_bit(HCI_MGMT
, &hdev
->dev_flags
))
2525 set_bit(HCI_BONDABLE
, &hdev
->dev_flags
);
2527 err
= hci_dev_do_open(hdev
);
2534 /* This function requires the caller holds hdev->lock */
2535 static void hci_pend_le_actions_clear(struct hci_dev
*hdev
)
2537 struct hci_conn_params
*p
;
2539 list_for_each_entry(p
, &hdev
->le_conn_params
, list
)
2540 list_del_init(&p
->action
);
2542 BT_DBG("All LE pending actions cleared");
2545 static int hci_dev_do_close(struct hci_dev
*hdev
)
2547 BT_DBG("%s %p", hdev
->name
, hdev
);
2549 cancel_delayed_work(&hdev
->power_off
);
2551 hci_req_cancel(hdev
, ENODEV
);
2554 if (!test_and_clear_bit(HCI_UP
, &hdev
->flags
)) {
2555 cancel_delayed_work_sync(&hdev
->cmd_timer
);
2556 hci_req_unlock(hdev
);
2560 /* Flush RX and TX works */
2561 flush_work(&hdev
->tx_work
);
2562 flush_work(&hdev
->rx_work
);
2564 if (hdev
->discov_timeout
> 0) {
2565 cancel_delayed_work(&hdev
->discov_off
);
2566 hdev
->discov_timeout
= 0;
2567 clear_bit(HCI_DISCOVERABLE
, &hdev
->dev_flags
);
2568 clear_bit(HCI_LIMITED_DISCOVERABLE
, &hdev
->dev_flags
);
2571 if (test_and_clear_bit(HCI_SERVICE_CACHE
, &hdev
->dev_flags
))
2572 cancel_delayed_work(&hdev
->service_cache
);
2574 cancel_delayed_work_sync(&hdev
->le_scan_disable
);
2576 if (test_bit(HCI_MGMT
, &hdev
->dev_flags
))
2577 cancel_delayed_work_sync(&hdev
->rpa_expired
);
2580 hci_inquiry_cache_flush(hdev
);
2581 hci_conn_hash_flush(hdev
);
2582 hci_pend_le_actions_clear(hdev
);
2583 hci_dev_unlock(hdev
);
2585 hci_notify(hdev
, HCI_DEV_DOWN
);
2591 skb_queue_purge(&hdev
->cmd_q
);
2592 atomic_set(&hdev
->cmd_cnt
, 1);
2593 if (!test_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
) &&
2594 !test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
) &&
2595 test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
)) {
2596 set_bit(HCI_INIT
, &hdev
->flags
);
2597 __hci_req_sync(hdev
, hci_reset_req
, 0, HCI_CMD_TIMEOUT
);
2598 clear_bit(HCI_INIT
, &hdev
->flags
);
2601 /* flush cmd work */
2602 flush_work(&hdev
->cmd_work
);
2605 skb_queue_purge(&hdev
->rx_q
);
2606 skb_queue_purge(&hdev
->cmd_q
);
2607 skb_queue_purge(&hdev
->raw_q
);
2609 /* Drop last sent command */
2610 if (hdev
->sent_cmd
) {
2611 cancel_delayed_work_sync(&hdev
->cmd_timer
);
2612 kfree_skb(hdev
->sent_cmd
);
2613 hdev
->sent_cmd
= NULL
;
2616 kfree_skb(hdev
->recv_evt
);
2617 hdev
->recv_evt
= NULL
;
2619 /* After this point our queues are empty
2620 * and no tasks are scheduled. */
2624 hdev
->flags
&= BIT(HCI_RAW
);
2625 hdev
->dev_flags
&= ~HCI_PERSISTENT_MASK
;
2627 if (!test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
)) {
2628 if (hdev
->dev_type
== HCI_BREDR
) {
2630 mgmt_powered(hdev
, 0);
2631 hci_dev_unlock(hdev
);
2635 /* Controller radio is available but is currently powered down */
2636 hdev
->amp_status
= AMP_STATUS_POWERED_DOWN
;
2638 memset(hdev
->eir
, 0, sizeof(hdev
->eir
));
2639 memset(hdev
->dev_class
, 0, sizeof(hdev
->dev_class
));
2640 bacpy(&hdev
->random_addr
, BDADDR_ANY
);
2642 hci_req_unlock(hdev
);
2648 int hci_dev_close(__u16 dev
)
2650 struct hci_dev
*hdev
;
2653 hdev
= hci_dev_get(dev
);
2657 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
2662 if (test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
2663 cancel_delayed_work(&hdev
->power_off
);
2665 err
= hci_dev_do_close(hdev
);
2672 int hci_dev_reset(__u16 dev
)
2674 struct hci_dev
*hdev
;
2677 hdev
= hci_dev_get(dev
);
2683 if (!test_bit(HCI_UP
, &hdev
->flags
)) {
2688 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
2693 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
)) {
2699 skb_queue_purge(&hdev
->rx_q
);
2700 skb_queue_purge(&hdev
->cmd_q
);
2703 hci_inquiry_cache_flush(hdev
);
2704 hci_conn_hash_flush(hdev
);
2705 hci_dev_unlock(hdev
);
2710 atomic_set(&hdev
->cmd_cnt
, 1);
2711 hdev
->acl_cnt
= 0; hdev
->sco_cnt
= 0; hdev
->le_cnt
= 0;
2713 ret
= __hci_req_sync(hdev
, hci_reset_req
, 0, HCI_INIT_TIMEOUT
);
2716 hci_req_unlock(hdev
);
2721 int hci_dev_reset_stat(__u16 dev
)
2723 struct hci_dev
*hdev
;
2726 hdev
= hci_dev_get(dev
);
2730 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
2735 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
)) {
2740 memset(&hdev
->stat
, 0, sizeof(struct hci_dev_stats
));
2747 static void hci_update_scan_state(struct hci_dev
*hdev
, u8 scan
)
2749 bool conn_changed
, discov_changed
;
2751 BT_DBG("%s scan 0x%02x", hdev
->name
, scan
);
2753 if ((scan
& SCAN_PAGE
))
2754 conn_changed
= !test_and_set_bit(HCI_CONNECTABLE
,
2757 conn_changed
= test_and_clear_bit(HCI_CONNECTABLE
,
2760 if ((scan
& SCAN_INQUIRY
)) {
2761 discov_changed
= !test_and_set_bit(HCI_DISCOVERABLE
,
2764 clear_bit(HCI_LIMITED_DISCOVERABLE
, &hdev
->dev_flags
);
2765 discov_changed
= test_and_clear_bit(HCI_DISCOVERABLE
,
2769 if (!test_bit(HCI_MGMT
, &hdev
->dev_flags
))
2772 if (conn_changed
|| discov_changed
) {
2773 /* In case this was disabled through mgmt */
2774 set_bit(HCI_BREDR_ENABLED
, &hdev
->dev_flags
);
2776 if (test_bit(HCI_LE_ENABLED
, &hdev
->dev_flags
))
2777 mgmt_update_adv_data(hdev
);
2779 mgmt_new_settings(hdev
);
2783 int hci_dev_cmd(unsigned int cmd
, void __user
*arg
)
2785 struct hci_dev
*hdev
;
2786 struct hci_dev_req dr
;
2789 if (copy_from_user(&dr
, arg
, sizeof(dr
)))
2792 hdev
= hci_dev_get(dr
.dev_id
);
2796 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
2801 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
)) {
2806 if (hdev
->dev_type
!= HCI_BREDR
) {
2811 if (!test_bit(HCI_BREDR_ENABLED
, &hdev
->dev_flags
)) {
2818 err
= hci_req_sync(hdev
, hci_auth_req
, dr
.dev_opt
,
2823 if (!lmp_encrypt_capable(hdev
)) {
2828 if (!test_bit(HCI_AUTH
, &hdev
->flags
)) {
2829 /* Auth must be enabled first */
2830 err
= hci_req_sync(hdev
, hci_auth_req
, dr
.dev_opt
,
2836 err
= hci_req_sync(hdev
, hci_encrypt_req
, dr
.dev_opt
,
2841 err
= hci_req_sync(hdev
, hci_scan_req
, dr
.dev_opt
,
2844 /* Ensure that the connectable and discoverable states
2845 * get correctly modified as this was a non-mgmt change.
2848 hci_update_scan_state(hdev
, dr
.dev_opt
);
2852 err
= hci_req_sync(hdev
, hci_linkpol_req
, dr
.dev_opt
,
2856 case HCISETLINKMODE
:
2857 hdev
->link_mode
= ((__u16
) dr
.dev_opt
) &
2858 (HCI_LM_MASTER
| HCI_LM_ACCEPT
);
2862 hdev
->pkt_type
= (__u16
) dr
.dev_opt
;
2866 hdev
->acl_mtu
= *((__u16
*) &dr
.dev_opt
+ 1);
2867 hdev
->acl_pkts
= *((__u16
*) &dr
.dev_opt
+ 0);
2871 hdev
->sco_mtu
= *((__u16
*) &dr
.dev_opt
+ 1);
2872 hdev
->sco_pkts
= *((__u16
*) &dr
.dev_opt
+ 0);
2885 int hci_get_dev_list(void __user
*arg
)
2887 struct hci_dev
*hdev
;
2888 struct hci_dev_list_req
*dl
;
2889 struct hci_dev_req
*dr
;
2890 int n
= 0, size
, err
;
2893 if (get_user(dev_num
, (__u16 __user
*) arg
))
2896 if (!dev_num
|| dev_num
> (PAGE_SIZE
* 2) / sizeof(*dr
))
2899 size
= sizeof(*dl
) + dev_num
* sizeof(*dr
);
2901 dl
= kzalloc(size
, GFP_KERNEL
);
2907 read_lock(&hci_dev_list_lock
);
2908 list_for_each_entry(hdev
, &hci_dev_list
, list
) {
2909 unsigned long flags
= hdev
->flags
;
2911 /* When the auto-off is configured it means the transport
2912 * is running, but in that case still indicate that the
2913 * device is actually down.
2915 if (test_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
2916 flags
&= ~BIT(HCI_UP
);
2918 (dr
+ n
)->dev_id
= hdev
->id
;
2919 (dr
+ n
)->dev_opt
= flags
;
2924 read_unlock(&hci_dev_list_lock
);
2927 size
= sizeof(*dl
) + n
* sizeof(*dr
);
2929 err
= copy_to_user(arg
, dl
, size
);
2932 return err
? -EFAULT
: 0;
2935 int hci_get_dev_info(void __user
*arg
)
2937 struct hci_dev
*hdev
;
2938 struct hci_dev_info di
;
2939 unsigned long flags
;
2942 if (copy_from_user(&di
, arg
, sizeof(di
)))
2945 hdev
= hci_dev_get(di
.dev_id
);
2949 /* When the auto-off is configured it means the transport
2950 * is running, but in that case still indicate that the
2951 * device is actually down.
2953 if (test_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
2954 flags
= hdev
->flags
& ~BIT(HCI_UP
);
2956 flags
= hdev
->flags
;
2958 strcpy(di
.name
, hdev
->name
);
2959 di
.bdaddr
= hdev
->bdaddr
;
2960 di
.type
= (hdev
->bus
& 0x0f) | ((hdev
->dev_type
& 0x03) << 4);
2962 di
.pkt_type
= hdev
->pkt_type
;
2963 if (lmp_bredr_capable(hdev
)) {
2964 di
.acl_mtu
= hdev
->acl_mtu
;
2965 di
.acl_pkts
= hdev
->acl_pkts
;
2966 di
.sco_mtu
= hdev
->sco_mtu
;
2967 di
.sco_pkts
= hdev
->sco_pkts
;
2969 di
.acl_mtu
= hdev
->le_mtu
;
2970 di
.acl_pkts
= hdev
->le_pkts
;
2974 di
.link_policy
= hdev
->link_policy
;
2975 di
.link_mode
= hdev
->link_mode
;
2977 memcpy(&di
.stat
, &hdev
->stat
, sizeof(di
.stat
));
2978 memcpy(&di
.features
, &hdev
->features
, sizeof(di
.features
));
2980 if (copy_to_user(arg
, &di
, sizeof(di
)))
2988 /* ---- Interface to HCI drivers ---- */
2990 static int hci_rfkill_set_block(void *data
, bool blocked
)
2992 struct hci_dev
*hdev
= data
;
2994 BT_DBG("%p name %s blocked %d", hdev
, hdev
->name
, blocked
);
2996 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
))
3000 set_bit(HCI_RFKILLED
, &hdev
->dev_flags
);
3001 if (!test_bit(HCI_SETUP
, &hdev
->dev_flags
) &&
3002 !test_bit(HCI_CONFIG
, &hdev
->dev_flags
))
3003 hci_dev_do_close(hdev
);
3005 clear_bit(HCI_RFKILLED
, &hdev
->dev_flags
);
3011 static const struct rfkill_ops hci_rfkill_ops
= {
3012 .set_block
= hci_rfkill_set_block
,
3015 static void hci_power_on(struct work_struct
*work
)
3017 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, power_on
);
3020 BT_DBG("%s", hdev
->name
);
3022 err
= hci_dev_do_open(hdev
);
3024 mgmt_set_powered_failed(hdev
, err
);
3028 /* During the HCI setup phase, a few error conditions are
3029 * ignored and they need to be checked now. If they are still
3030 * valid, it is important to turn the device back off.
3032 if (test_bit(HCI_RFKILLED
, &hdev
->dev_flags
) ||
3033 test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
) ||
3034 (hdev
->dev_type
== HCI_BREDR
&&
3035 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
) &&
3036 !bacmp(&hdev
->static_addr
, BDADDR_ANY
))) {
3037 clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
);
3038 hci_dev_do_close(hdev
);
3039 } else if (test_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
)) {
3040 queue_delayed_work(hdev
->req_workqueue
, &hdev
->power_off
,
3041 HCI_AUTO_OFF_TIMEOUT
);
3044 if (test_and_clear_bit(HCI_SETUP
, &hdev
->dev_flags
)) {
3045 /* For unconfigured devices, set the HCI_RAW flag
3046 * so that userspace can easily identify them.
3048 if (test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
))
3049 set_bit(HCI_RAW
, &hdev
->flags
);
3051 /* For fully configured devices, this will send
3052 * the Index Added event. For unconfigured devices,
3053 * it will send Unconfigued Index Added event.
3055 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
3056 * and no event will be send.
3058 mgmt_index_added(hdev
);
3059 } else if (test_and_clear_bit(HCI_CONFIG
, &hdev
->dev_flags
)) {
3060 /* When the controller is now configured, then it
3061 * is important to clear the HCI_RAW flag.
3063 if (!test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
))
3064 clear_bit(HCI_RAW
, &hdev
->flags
);
3066 /* Powering on the controller with HCI_CONFIG set only
3067 * happens with the transition from unconfigured to
3068 * configured. This will send the Index Added event.
3070 mgmt_index_added(hdev
);
3074 static void hci_power_off(struct work_struct
*work
)
3076 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
3079 BT_DBG("%s", hdev
->name
);
3081 hci_dev_do_close(hdev
);
3084 static void hci_discov_off(struct work_struct
*work
)
3086 struct hci_dev
*hdev
;
3088 hdev
= container_of(work
, struct hci_dev
, discov_off
.work
);
3090 BT_DBG("%s", hdev
->name
);
3092 mgmt_discoverable_timeout(hdev
);
3095 void hci_uuids_clear(struct hci_dev
*hdev
)
3097 struct bt_uuid
*uuid
, *tmp
;
3099 list_for_each_entry_safe(uuid
, tmp
, &hdev
->uuids
, list
) {
3100 list_del(&uuid
->list
);
3105 void hci_link_keys_clear(struct hci_dev
*hdev
)
3107 struct list_head
*p
, *n
;
3109 list_for_each_safe(p
, n
, &hdev
->link_keys
) {
3110 struct link_key
*key
;
3112 key
= list_entry(p
, struct link_key
, list
);
3119 void hci_smp_ltks_clear(struct hci_dev
*hdev
)
3121 struct smp_ltk
*k
, *tmp
;
3123 list_for_each_entry_safe(k
, tmp
, &hdev
->long_term_keys
, list
) {
3129 void hci_smp_irks_clear(struct hci_dev
*hdev
)
3131 struct smp_irk
*k
, *tmp
;
3133 list_for_each_entry_safe(k
, tmp
, &hdev
->identity_resolving_keys
, list
) {
3139 struct link_key
*hci_find_link_key(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
3143 list_for_each_entry(k
, &hdev
->link_keys
, list
)
3144 if (bacmp(bdaddr
, &k
->bdaddr
) == 0)
3150 static bool hci_persistent_key(struct hci_dev
*hdev
, struct hci_conn
*conn
,
3151 u8 key_type
, u8 old_key_type
)
3154 if (key_type
< 0x03)
3157 /* Debug keys are insecure so don't store them persistently */
3158 if (key_type
== HCI_LK_DEBUG_COMBINATION
)
3161 /* Changed combination key and there's no previous one */
3162 if (key_type
== HCI_LK_CHANGED_COMBINATION
&& old_key_type
== 0xff)
3165 /* Security mode 3 case */
3169 /* Neither local nor remote side had no-bonding as requirement */
3170 if (conn
->auth_type
> 0x01 && conn
->remote_auth
> 0x01)
3173 /* Local side had dedicated bonding as requirement */
3174 if (conn
->auth_type
== 0x02 || conn
->auth_type
== 0x03)
3177 /* Remote side had dedicated bonding as requirement */
3178 if (conn
->remote_auth
== 0x02 || conn
->remote_auth
== 0x03)
3181 /* If none of the above criteria match, then don't store the key
3186 static u8
ltk_role(u8 type
)
3188 if (type
== SMP_LTK
)
3189 return HCI_ROLE_MASTER
;
3191 return HCI_ROLE_SLAVE
;
3194 struct smp_ltk
*hci_find_ltk(struct hci_dev
*hdev
, __le16 ediv
, __le64 rand
,
3199 list_for_each_entry(k
, &hdev
->long_term_keys
, list
) {
3200 if (k
->ediv
!= ediv
|| k
->rand
!= rand
)
3203 if (ltk_role(k
->type
) != role
)
3212 struct smp_ltk
*hci_find_ltk_by_addr(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3213 u8 addr_type
, u8 role
)
3217 list_for_each_entry(k
, &hdev
->long_term_keys
, list
)
3218 if (addr_type
== k
->bdaddr_type
&&
3219 bacmp(bdaddr
, &k
->bdaddr
) == 0 &&
3220 ltk_role(k
->type
) == role
)
3226 struct smp_irk
*hci_find_irk_by_rpa(struct hci_dev
*hdev
, bdaddr_t
*rpa
)
3228 struct smp_irk
*irk
;
3230 list_for_each_entry(irk
, &hdev
->identity_resolving_keys
, list
) {
3231 if (!bacmp(&irk
->rpa
, rpa
))
3235 list_for_each_entry(irk
, &hdev
->identity_resolving_keys
, list
) {
3236 if (smp_irk_matches(hdev
->tfm_aes
, irk
->val
, rpa
)) {
3237 bacpy(&irk
->rpa
, rpa
);
3245 struct smp_irk
*hci_find_irk_by_addr(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3248 struct smp_irk
*irk
;
3250 /* Identity Address must be public or static random */
3251 if (addr_type
== ADDR_LE_DEV_RANDOM
&& (bdaddr
->b
[5] & 0xc0) != 0xc0)
3254 list_for_each_entry(irk
, &hdev
->identity_resolving_keys
, list
) {
3255 if (addr_type
== irk
->addr_type
&&
3256 bacmp(bdaddr
, &irk
->bdaddr
) == 0)
3263 struct link_key
*hci_add_link_key(struct hci_dev
*hdev
, struct hci_conn
*conn
,
3264 bdaddr_t
*bdaddr
, u8
*val
, u8 type
,
3265 u8 pin_len
, bool *persistent
)
3267 struct link_key
*key
, *old_key
;
3270 old_key
= hci_find_link_key(hdev
, bdaddr
);
3272 old_key_type
= old_key
->type
;
3275 old_key_type
= conn
? conn
->key_type
: 0xff;
3276 key
= kzalloc(sizeof(*key
), GFP_KERNEL
);
3279 list_add(&key
->list
, &hdev
->link_keys
);
3282 BT_DBG("%s key for %pMR type %u", hdev
->name
, bdaddr
, type
);
3284 /* Some buggy controller combinations generate a changed
3285 * combination key for legacy pairing even when there's no
3287 if (type
== HCI_LK_CHANGED_COMBINATION
&&
3288 (!conn
|| conn
->remote_auth
== 0xff) && old_key_type
== 0xff) {
3289 type
= HCI_LK_COMBINATION
;
3291 conn
->key_type
= type
;
3294 bacpy(&key
->bdaddr
, bdaddr
);
3295 memcpy(key
->val
, val
, HCI_LINK_KEY_SIZE
);
3296 key
->pin_len
= pin_len
;
3298 if (type
== HCI_LK_CHANGED_COMBINATION
)
3299 key
->type
= old_key_type
;
3304 *persistent
= hci_persistent_key(hdev
, conn
, type
,
3310 struct smp_ltk
*hci_add_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3311 u8 addr_type
, u8 type
, u8 authenticated
,
3312 u8 tk
[16], u8 enc_size
, __le16 ediv
, __le64 rand
)
3314 struct smp_ltk
*key
, *old_key
;
3315 u8 role
= ltk_role(type
);
3317 old_key
= hci_find_ltk_by_addr(hdev
, bdaddr
, addr_type
, role
);
3321 key
= kzalloc(sizeof(*key
), GFP_KERNEL
);
3324 list_add(&key
->list
, &hdev
->long_term_keys
);
3327 bacpy(&key
->bdaddr
, bdaddr
);
3328 key
->bdaddr_type
= addr_type
;
3329 memcpy(key
->val
, tk
, sizeof(key
->val
));
3330 key
->authenticated
= authenticated
;
3333 key
->enc_size
= enc_size
;
3339 struct smp_irk
*hci_add_irk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3340 u8 addr_type
, u8 val
[16], bdaddr_t
*rpa
)
3342 struct smp_irk
*irk
;
3344 irk
= hci_find_irk_by_addr(hdev
, bdaddr
, addr_type
);
3346 irk
= kzalloc(sizeof(*irk
), GFP_KERNEL
);
3350 bacpy(&irk
->bdaddr
, bdaddr
);
3351 irk
->addr_type
= addr_type
;
3353 list_add(&irk
->list
, &hdev
->identity_resolving_keys
);
3356 memcpy(irk
->val
, val
, 16);
3357 bacpy(&irk
->rpa
, rpa
);
3362 int hci_remove_link_key(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
3364 struct link_key
*key
;
3366 key
= hci_find_link_key(hdev
, bdaddr
);
3370 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
3372 list_del(&key
->list
);
3378 int hci_remove_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 bdaddr_type
)
3380 struct smp_ltk
*k
, *tmp
;
3383 list_for_each_entry_safe(k
, tmp
, &hdev
->long_term_keys
, list
) {
3384 if (bacmp(bdaddr
, &k
->bdaddr
) || k
->bdaddr_type
!= bdaddr_type
)
3387 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
3394 return removed
? 0 : -ENOENT
;
3397 void hci_remove_irk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 addr_type
)
3399 struct smp_irk
*k
, *tmp
;
3401 list_for_each_entry_safe(k
, tmp
, &hdev
->identity_resolving_keys
, list
) {
3402 if (bacmp(bdaddr
, &k
->bdaddr
) || k
->addr_type
!= addr_type
)
3405 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
3412 /* HCI command timer function */
3413 static void hci_cmd_timeout(struct work_struct
*work
)
3415 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
3418 if (hdev
->sent_cmd
) {
3419 struct hci_command_hdr
*sent
= (void *) hdev
->sent_cmd
->data
;
3420 u16 opcode
= __le16_to_cpu(sent
->opcode
);
3422 BT_ERR("%s command 0x%4.4x tx timeout", hdev
->name
, opcode
);
3424 BT_ERR("%s command tx timeout", hdev
->name
);
3427 atomic_set(&hdev
->cmd_cnt
, 1);
3428 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
3431 struct oob_data
*hci_find_remote_oob_data(struct hci_dev
*hdev
,
3434 struct oob_data
*data
;
3436 list_for_each_entry(data
, &hdev
->remote_oob_data
, list
)
3437 if (bacmp(bdaddr
, &data
->bdaddr
) == 0)
3443 int hci_remove_remote_oob_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
3445 struct oob_data
*data
;
3447 data
= hci_find_remote_oob_data(hdev
, bdaddr
);
3451 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
3453 list_del(&data
->list
);
3459 void hci_remote_oob_data_clear(struct hci_dev
*hdev
)
3461 struct oob_data
*data
, *n
;
3463 list_for_each_entry_safe(data
, n
, &hdev
->remote_oob_data
, list
) {
3464 list_del(&data
->list
);
3469 int hci_add_remote_oob_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3470 u8
*hash
, u8
*randomizer
)
3472 struct oob_data
*data
;
3474 data
= hci_find_remote_oob_data(hdev
, bdaddr
);
3476 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3480 bacpy(&data
->bdaddr
, bdaddr
);
3481 list_add(&data
->list
, &hdev
->remote_oob_data
);
3484 memcpy(data
->hash192
, hash
, sizeof(data
->hash192
));
3485 memcpy(data
->randomizer192
, randomizer
, sizeof(data
->randomizer192
));
3487 memset(data
->hash256
, 0, sizeof(data
->hash256
));
3488 memset(data
->randomizer256
, 0, sizeof(data
->randomizer256
));
3490 BT_DBG("%s for %pMR", hdev
->name
, bdaddr
);
3495 int hci_add_remote_oob_ext_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3496 u8
*hash192
, u8
*randomizer192
,
3497 u8
*hash256
, u8
*randomizer256
)
3499 struct oob_data
*data
;
3501 data
= hci_find_remote_oob_data(hdev
, bdaddr
);
3503 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3507 bacpy(&data
->bdaddr
, bdaddr
);
3508 list_add(&data
->list
, &hdev
->remote_oob_data
);
3511 memcpy(data
->hash192
, hash192
, sizeof(data
->hash192
));
3512 memcpy(data
->randomizer192
, randomizer192
, sizeof(data
->randomizer192
));
3514 memcpy(data
->hash256
, hash256
, sizeof(data
->hash256
));
3515 memcpy(data
->randomizer256
, randomizer256
, sizeof(data
->randomizer256
));
3517 BT_DBG("%s for %pMR", hdev
->name
, bdaddr
);
3522 struct bdaddr_list
*hci_bdaddr_list_lookup(struct list_head
*bdaddr_list
,
3523 bdaddr_t
*bdaddr
, u8 type
)
3525 struct bdaddr_list
*b
;
3527 list_for_each_entry(b
, bdaddr_list
, list
) {
3528 if (!bacmp(&b
->bdaddr
, bdaddr
) && b
->bdaddr_type
== type
)
3535 void hci_bdaddr_list_clear(struct list_head
*bdaddr_list
)
3537 struct list_head
*p
, *n
;
3539 list_for_each_safe(p
, n
, bdaddr_list
) {
3540 struct bdaddr_list
*b
= list_entry(p
, struct bdaddr_list
, list
);
3547 int hci_bdaddr_list_add(struct list_head
*list
, bdaddr_t
*bdaddr
, u8 type
)
3549 struct bdaddr_list
*entry
;
3551 if (!bacmp(bdaddr
, BDADDR_ANY
))
3554 if (hci_bdaddr_list_lookup(list
, bdaddr
, type
))
3557 entry
= kzalloc(sizeof(*entry
), GFP_KERNEL
);
3561 bacpy(&entry
->bdaddr
, bdaddr
);
3562 entry
->bdaddr_type
= type
;
3564 list_add(&entry
->list
, list
);
3569 int hci_bdaddr_list_del(struct list_head
*list
, bdaddr_t
*bdaddr
, u8 type
)
3571 struct bdaddr_list
*entry
;
3573 if (!bacmp(bdaddr
, BDADDR_ANY
)) {
3574 hci_bdaddr_list_clear(list
);
3578 entry
= hci_bdaddr_list_lookup(list
, bdaddr
, type
);
3582 list_del(&entry
->list
);
3588 /* This function requires the caller holds hdev->lock */
3589 struct hci_conn_params
*hci_conn_params_lookup(struct hci_dev
*hdev
,
3590 bdaddr_t
*addr
, u8 addr_type
)
3592 struct hci_conn_params
*params
;
3594 /* The conn params list only contains identity addresses */
3595 if (!hci_is_identity_address(addr
, addr_type
))
3598 list_for_each_entry(params
, &hdev
->le_conn_params
, list
) {
3599 if (bacmp(¶ms
->addr
, addr
) == 0 &&
3600 params
->addr_type
== addr_type
) {
3608 static bool is_connected(struct hci_dev
*hdev
, bdaddr_t
*addr
, u8 type
)
3610 struct hci_conn
*conn
;
3612 conn
= hci_conn_hash_lookup_ba(hdev
, LE_LINK
, addr
);
3616 if (conn
->dst_type
!= type
)
3619 if (conn
->state
!= BT_CONNECTED
)
3625 /* This function requires the caller holds hdev->lock */
3626 struct hci_conn_params
*hci_pend_le_action_lookup(struct list_head
*list
,
3627 bdaddr_t
*addr
, u8 addr_type
)
3629 struct hci_conn_params
*param
;
3631 /* The list only contains identity addresses */
3632 if (!hci_is_identity_address(addr
, addr_type
))
3635 list_for_each_entry(param
, list
, action
) {
3636 if (bacmp(¶m
->addr
, addr
) == 0 &&
3637 param
->addr_type
== addr_type
)
3644 /* This function requires the caller holds hdev->lock */
3645 struct hci_conn_params
*hci_conn_params_add(struct hci_dev
*hdev
,
3646 bdaddr_t
*addr
, u8 addr_type
)
3648 struct hci_conn_params
*params
;
3650 if (!hci_is_identity_address(addr
, addr_type
))
3653 params
= hci_conn_params_lookup(hdev
, addr
, addr_type
);
3657 params
= kzalloc(sizeof(*params
), GFP_KERNEL
);
3659 BT_ERR("Out of memory");
3663 bacpy(¶ms
->addr
, addr
);
3664 params
->addr_type
= addr_type
;
3666 list_add(¶ms
->list
, &hdev
->le_conn_params
);
3667 INIT_LIST_HEAD(¶ms
->action
);
3669 params
->conn_min_interval
= hdev
->le_conn_min_interval
;
3670 params
->conn_max_interval
= hdev
->le_conn_max_interval
;
3671 params
->conn_latency
= hdev
->le_conn_latency
;
3672 params
->supervision_timeout
= hdev
->le_supv_timeout
;
3673 params
->auto_connect
= HCI_AUTO_CONN_DISABLED
;
3675 BT_DBG("addr %pMR (type %u)", addr
, addr_type
);
3680 /* This function requires the caller holds hdev->lock */
3681 int hci_conn_params_set(struct hci_dev
*hdev
, bdaddr_t
*addr
, u8 addr_type
,
3684 struct hci_conn_params
*params
;
3686 params
= hci_conn_params_add(hdev
, addr
, addr_type
);
3690 if (params
->auto_connect
== auto_connect
)
3693 list_del_init(¶ms
->action
);
3695 switch (auto_connect
) {
3696 case HCI_AUTO_CONN_DISABLED
:
3697 case HCI_AUTO_CONN_LINK_LOSS
:
3698 hci_update_background_scan(hdev
);
3700 case HCI_AUTO_CONN_REPORT
:
3701 list_add(¶ms
->action
, &hdev
->pend_le_reports
);
3702 hci_update_background_scan(hdev
);
3704 case HCI_AUTO_CONN_DIRECT
:
3705 case HCI_AUTO_CONN_ALWAYS
:
3706 if (!is_connected(hdev
, addr
, addr_type
)) {
3707 list_add(¶ms
->action
, &hdev
->pend_le_conns
);
3708 hci_update_background_scan(hdev
);
3713 params
->auto_connect
= auto_connect
;
3715 BT_DBG("addr %pMR (type %u) auto_connect %u", addr
, addr_type
,
3721 /* This function requires the caller holds hdev->lock */
3722 void hci_conn_params_del(struct hci_dev
*hdev
, bdaddr_t
*addr
, u8 addr_type
)
3724 struct hci_conn_params
*params
;
3726 params
= hci_conn_params_lookup(hdev
, addr
, addr_type
);
3730 list_del(¶ms
->action
);
3731 list_del(¶ms
->list
);
3734 hci_update_background_scan(hdev
);
3736 BT_DBG("addr %pMR (type %u)", addr
, addr_type
);
3739 /* This function requires the caller holds hdev->lock */
3740 void hci_conn_params_clear_disabled(struct hci_dev
*hdev
)
3742 struct hci_conn_params
*params
, *tmp
;
3744 list_for_each_entry_safe(params
, tmp
, &hdev
->le_conn_params
, list
) {
3745 if (params
->auto_connect
!= HCI_AUTO_CONN_DISABLED
)
3747 list_del(¶ms
->list
);
3751 BT_DBG("All LE disabled connection parameters were removed");
3754 /* This function requires the caller holds hdev->lock */
3755 void hci_conn_params_clear_all(struct hci_dev
*hdev
)
3757 struct hci_conn_params
*params
, *tmp
;
3759 list_for_each_entry_safe(params
, tmp
, &hdev
->le_conn_params
, list
) {
3760 list_del(¶ms
->action
);
3761 list_del(¶ms
->list
);
3765 hci_update_background_scan(hdev
);
3767 BT_DBG("All LE connection parameters were removed");
3770 static void inquiry_complete(struct hci_dev
*hdev
, u8 status
)
3773 BT_ERR("Failed to start inquiry: status %d", status
);
3776 hci_discovery_set_state(hdev
, DISCOVERY_STOPPED
);
3777 hci_dev_unlock(hdev
);
3782 static void le_scan_disable_work_complete(struct hci_dev
*hdev
, u8 status
)
3784 /* General inquiry access code (GIAC) */
3785 u8 lap
[3] = { 0x33, 0x8b, 0x9e };
3786 struct hci_request req
;
3787 struct hci_cp_inquiry cp
;
3791 BT_ERR("Failed to disable LE scanning: status %d", status
);
3795 switch (hdev
->discovery
.type
) {
3796 case DISCOV_TYPE_LE
:
3798 hci_discovery_set_state(hdev
, DISCOVERY_STOPPED
);
3799 hci_dev_unlock(hdev
);
3802 case DISCOV_TYPE_INTERLEAVED
:
3803 hci_req_init(&req
, hdev
);
3805 memset(&cp
, 0, sizeof(cp
));
3806 memcpy(&cp
.lap
, lap
, sizeof(cp
.lap
));
3807 cp
.length
= DISCOV_INTERLEAVED_INQUIRY_LEN
;
3808 hci_req_add(&req
, HCI_OP_INQUIRY
, sizeof(cp
), &cp
);
3812 hci_inquiry_cache_flush(hdev
);
3814 err
= hci_req_run(&req
, inquiry_complete
);
3816 BT_ERR("Inquiry request failed: err %d", err
);
3817 hci_discovery_set_state(hdev
, DISCOVERY_STOPPED
);
3820 hci_dev_unlock(hdev
);
3825 static void le_scan_disable_work(struct work_struct
*work
)
3827 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
3828 le_scan_disable
.work
);
3829 struct hci_request req
;
3832 BT_DBG("%s", hdev
->name
);
3834 hci_req_init(&req
, hdev
);
3836 hci_req_add_le_scan_disable(&req
);
3838 err
= hci_req_run(&req
, le_scan_disable_work_complete
);
3840 BT_ERR("Disable LE scanning request failed: err %d", err
);
3843 static void set_random_addr(struct hci_request
*req
, bdaddr_t
*rpa
)
3845 struct hci_dev
*hdev
= req
->hdev
;
3847 /* If we're advertising or initiating an LE connection we can't
3848 * go ahead and change the random address at this time. This is
3849 * because the eventual initiator address used for the
3850 * subsequently created connection will be undefined (some
3851 * controllers use the new address and others the one we had
3852 * when the operation started).
3854 * In this kind of scenario skip the update and let the random
3855 * address be updated at the next cycle.
3857 if (test_bit(HCI_LE_ADV
, &hdev
->dev_flags
) ||
3858 hci_conn_hash_lookup_state(hdev
, LE_LINK
, BT_CONNECT
)) {
3859 BT_DBG("Deferring random address update");
3863 hci_req_add(req
, HCI_OP_LE_SET_RANDOM_ADDR
, 6, rpa
);
3866 int hci_update_random_address(struct hci_request
*req
, bool require_privacy
,
3869 struct hci_dev
*hdev
= req
->hdev
;
3872 /* If privacy is enabled use a resolvable private address. If
3873 * current RPA has expired or there is something else than
3874 * the current RPA in use, then generate a new one.
3876 if (test_bit(HCI_PRIVACY
, &hdev
->dev_flags
)) {
3879 *own_addr_type
= ADDR_LE_DEV_RANDOM
;
3881 if (!test_and_clear_bit(HCI_RPA_EXPIRED
, &hdev
->dev_flags
) &&
3882 !bacmp(&hdev
->random_addr
, &hdev
->rpa
))
3885 err
= smp_generate_rpa(hdev
->tfm_aes
, hdev
->irk
, &hdev
->rpa
);
3887 BT_ERR("%s failed to generate new RPA", hdev
->name
);
3891 set_random_addr(req
, &hdev
->rpa
);
3893 to
= msecs_to_jiffies(hdev
->rpa_timeout
* 1000);
3894 queue_delayed_work(hdev
->workqueue
, &hdev
->rpa_expired
, to
);
3899 /* In case of required privacy without resolvable private address,
3900 * use an unresolvable private address. This is useful for active
3901 * scanning and non-connectable advertising.
3903 if (require_privacy
) {
3906 get_random_bytes(&urpa
, 6);
3907 urpa
.b
[5] &= 0x3f; /* Clear two most significant bits */
3909 *own_addr_type
= ADDR_LE_DEV_RANDOM
;
3910 set_random_addr(req
, &urpa
);
3914 /* If forcing static address is in use or there is no public
3915 * address use the static address as random address (but skip
3916 * the HCI command if the current random address is already the
3919 if (test_bit(HCI_FORCE_STATIC_ADDR
, &hdev
->dbg_flags
) ||
3920 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
)) {
3921 *own_addr_type
= ADDR_LE_DEV_RANDOM
;
3922 if (bacmp(&hdev
->static_addr
, &hdev
->random_addr
))
3923 hci_req_add(req
, HCI_OP_LE_SET_RANDOM_ADDR
, 6,
3924 &hdev
->static_addr
);
3928 /* Neither privacy nor static address is being used so use a
3931 *own_addr_type
= ADDR_LE_DEV_PUBLIC
;
3936 /* Copy the Identity Address of the controller.
3938 * If the controller has a public BD_ADDR, then by default use that one.
3939 * If this is a LE only controller without a public address, default to
3940 * the static random address.
3942 * For debugging purposes it is possible to force controllers with a
3943 * public address to use the static random address instead.
3945 void hci_copy_identity_address(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3948 if (test_bit(HCI_FORCE_STATIC_ADDR
, &hdev
->dbg_flags
) ||
3949 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
)) {
3950 bacpy(bdaddr
, &hdev
->static_addr
);
3951 *bdaddr_type
= ADDR_LE_DEV_RANDOM
;
3953 bacpy(bdaddr
, &hdev
->bdaddr
);
3954 *bdaddr_type
= ADDR_LE_DEV_PUBLIC
;
3958 /* Alloc HCI device */
3959 struct hci_dev
*hci_alloc_dev(void)
3961 struct hci_dev
*hdev
;
3963 hdev
= kzalloc(sizeof(*hdev
), GFP_KERNEL
);
3967 hdev
->pkt_type
= (HCI_DM1
| HCI_DH1
| HCI_HV1
);
3968 hdev
->esco_type
= (ESCO_HV1
);
3969 hdev
->link_mode
= (HCI_LM_ACCEPT
);
3970 hdev
->num_iac
= 0x01; /* One IAC support is mandatory */
3971 hdev
->io_capability
= 0x03; /* No Input No Output */
3972 hdev
->manufacturer
= 0xffff; /* Default to internal use */
3973 hdev
->inq_tx_power
= HCI_TX_POWER_INVALID
;
3974 hdev
->adv_tx_power
= HCI_TX_POWER_INVALID
;
3976 hdev
->sniff_max_interval
= 800;
3977 hdev
->sniff_min_interval
= 80;
3979 hdev
->le_adv_channel_map
= 0x07;
3980 hdev
->le_adv_min_interval
= 0x0800;
3981 hdev
->le_adv_max_interval
= 0x0800;
3982 hdev
->le_scan_interval
= 0x0060;
3983 hdev
->le_scan_window
= 0x0030;
3984 hdev
->le_conn_min_interval
= 0x0028;
3985 hdev
->le_conn_max_interval
= 0x0038;
3986 hdev
->le_conn_latency
= 0x0000;
3987 hdev
->le_supv_timeout
= 0x002a;
3989 hdev
->rpa_timeout
= HCI_DEFAULT_RPA_TIMEOUT
;
3990 hdev
->discov_interleaved_timeout
= DISCOV_INTERLEAVED_TIMEOUT
;
3991 hdev
->conn_info_min_age
= DEFAULT_CONN_INFO_MIN_AGE
;
3992 hdev
->conn_info_max_age
= DEFAULT_CONN_INFO_MAX_AGE
;
3994 mutex_init(&hdev
->lock
);
3995 mutex_init(&hdev
->req_lock
);
3997 INIT_LIST_HEAD(&hdev
->mgmt_pending
);
3998 INIT_LIST_HEAD(&hdev
->blacklist
);
3999 INIT_LIST_HEAD(&hdev
->whitelist
);
4000 INIT_LIST_HEAD(&hdev
->uuids
);
4001 INIT_LIST_HEAD(&hdev
->link_keys
);
4002 INIT_LIST_HEAD(&hdev
->long_term_keys
);
4003 INIT_LIST_HEAD(&hdev
->identity_resolving_keys
);
4004 INIT_LIST_HEAD(&hdev
->remote_oob_data
);
4005 INIT_LIST_HEAD(&hdev
->le_white_list
);
4006 INIT_LIST_HEAD(&hdev
->le_conn_params
);
4007 INIT_LIST_HEAD(&hdev
->pend_le_conns
);
4008 INIT_LIST_HEAD(&hdev
->pend_le_reports
);
4009 INIT_LIST_HEAD(&hdev
->conn_hash
.list
);
4011 INIT_WORK(&hdev
->rx_work
, hci_rx_work
);
4012 INIT_WORK(&hdev
->cmd_work
, hci_cmd_work
);
4013 INIT_WORK(&hdev
->tx_work
, hci_tx_work
);
4014 INIT_WORK(&hdev
->power_on
, hci_power_on
);
4016 INIT_DELAYED_WORK(&hdev
->power_off
, hci_power_off
);
4017 INIT_DELAYED_WORK(&hdev
->discov_off
, hci_discov_off
);
4018 INIT_DELAYED_WORK(&hdev
->le_scan_disable
, le_scan_disable_work
);
4020 skb_queue_head_init(&hdev
->rx_q
);
4021 skb_queue_head_init(&hdev
->cmd_q
);
4022 skb_queue_head_init(&hdev
->raw_q
);
4024 init_waitqueue_head(&hdev
->req_wait_q
);
4026 INIT_DELAYED_WORK(&hdev
->cmd_timer
, hci_cmd_timeout
);
4028 hci_init_sysfs(hdev
);
4029 discovery_init(hdev
);
4033 EXPORT_SYMBOL(hci_alloc_dev
);
4035 /* Free HCI device */
4036 void hci_free_dev(struct hci_dev
*hdev
)
4038 /* will free via device release */
4039 put_device(&hdev
->dev
);
4041 EXPORT_SYMBOL(hci_free_dev
);
4043 /* Register HCI device */
4044 int hci_register_dev(struct hci_dev
*hdev
)
4048 if (!hdev
->open
|| !hdev
->close
|| !hdev
->send
)
4051 /* Do not allow HCI_AMP devices to register at index 0,
4052 * so the index can be used as the AMP controller ID.
4054 switch (hdev
->dev_type
) {
4056 id
= ida_simple_get(&hci_index_ida
, 0, 0, GFP_KERNEL
);
4059 id
= ida_simple_get(&hci_index_ida
, 1, 0, GFP_KERNEL
);
4068 sprintf(hdev
->name
, "hci%d", id
);
4071 BT_DBG("%p name %s bus %d", hdev
, hdev
->name
, hdev
->bus
);
4073 hdev
->workqueue
= alloc_workqueue("%s", WQ_HIGHPRI
| WQ_UNBOUND
|
4074 WQ_MEM_RECLAIM
, 1, hdev
->name
);
4075 if (!hdev
->workqueue
) {
4080 hdev
->req_workqueue
= alloc_workqueue("%s", WQ_HIGHPRI
| WQ_UNBOUND
|
4081 WQ_MEM_RECLAIM
, 1, hdev
->name
);
4082 if (!hdev
->req_workqueue
) {
4083 destroy_workqueue(hdev
->workqueue
);
4088 if (!IS_ERR_OR_NULL(bt_debugfs
))
4089 hdev
->debugfs
= debugfs_create_dir(hdev
->name
, bt_debugfs
);
4091 dev_set_name(&hdev
->dev
, "%s", hdev
->name
);
4093 hdev
->tfm_aes
= crypto_alloc_blkcipher("ecb(aes)", 0,
4095 if (IS_ERR(hdev
->tfm_aes
)) {
4096 BT_ERR("Unable to create crypto context");
4097 error
= PTR_ERR(hdev
->tfm_aes
);
4098 hdev
->tfm_aes
= NULL
;
4102 error
= device_add(&hdev
->dev
);
4106 hdev
->rfkill
= rfkill_alloc(hdev
->name
, &hdev
->dev
,
4107 RFKILL_TYPE_BLUETOOTH
, &hci_rfkill_ops
,
4110 if (rfkill_register(hdev
->rfkill
) < 0) {
4111 rfkill_destroy(hdev
->rfkill
);
4112 hdev
->rfkill
= NULL
;
4116 if (hdev
->rfkill
&& rfkill_blocked(hdev
->rfkill
))
4117 set_bit(HCI_RFKILLED
, &hdev
->dev_flags
);
4119 set_bit(HCI_SETUP
, &hdev
->dev_flags
);
4120 set_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
);
4122 if (hdev
->dev_type
== HCI_BREDR
) {
4123 /* Assume BR/EDR support until proven otherwise (such as
4124 * through reading supported features during init.
4126 set_bit(HCI_BREDR_ENABLED
, &hdev
->dev_flags
);
4129 write_lock(&hci_dev_list_lock
);
4130 list_add(&hdev
->list
, &hci_dev_list
);
4131 write_unlock(&hci_dev_list_lock
);
4133 /* Devices that are marked for raw-only usage are unconfigured
4134 * and should not be included in normal operation.
4136 if (test_bit(HCI_QUIRK_RAW_DEVICE
, &hdev
->quirks
))
4137 set_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
);
4139 hci_notify(hdev
, HCI_DEV_REG
);
4142 queue_work(hdev
->req_workqueue
, &hdev
->power_on
);
4147 crypto_free_blkcipher(hdev
->tfm_aes
);
4149 destroy_workqueue(hdev
->workqueue
);
4150 destroy_workqueue(hdev
->req_workqueue
);
4152 ida_simple_remove(&hci_index_ida
, hdev
->id
);
4156 EXPORT_SYMBOL(hci_register_dev
);
4158 /* Unregister HCI device */
4159 void hci_unregister_dev(struct hci_dev
*hdev
)
4163 BT_DBG("%p name %s bus %d", hdev
, hdev
->name
, hdev
->bus
);
4165 set_bit(HCI_UNREGISTER
, &hdev
->dev_flags
);
4169 write_lock(&hci_dev_list_lock
);
4170 list_del(&hdev
->list
);
4171 write_unlock(&hci_dev_list_lock
);
4173 hci_dev_do_close(hdev
);
4175 for (i
= 0; i
< NUM_REASSEMBLY
; i
++)
4176 kfree_skb(hdev
->reassembly
[i
]);
4178 cancel_work_sync(&hdev
->power_on
);
4180 if (!test_bit(HCI_INIT
, &hdev
->flags
) &&
4181 !test_bit(HCI_SETUP
, &hdev
->dev_flags
) &&
4182 !test_bit(HCI_CONFIG
, &hdev
->dev_flags
)) {
4184 mgmt_index_removed(hdev
);
4185 hci_dev_unlock(hdev
);
4188 /* mgmt_index_removed should take care of emptying the
4190 BUG_ON(!list_empty(&hdev
->mgmt_pending
));
4192 hci_notify(hdev
, HCI_DEV_UNREG
);
4195 rfkill_unregister(hdev
->rfkill
);
4196 rfkill_destroy(hdev
->rfkill
);
4200 crypto_free_blkcipher(hdev
->tfm_aes
);
4202 device_del(&hdev
->dev
);
4204 debugfs_remove_recursive(hdev
->debugfs
);
4206 destroy_workqueue(hdev
->workqueue
);
4207 destroy_workqueue(hdev
->req_workqueue
);
4210 hci_bdaddr_list_clear(&hdev
->blacklist
);
4211 hci_bdaddr_list_clear(&hdev
->whitelist
);
4212 hci_uuids_clear(hdev
);
4213 hci_link_keys_clear(hdev
);
4214 hci_smp_ltks_clear(hdev
);
4215 hci_smp_irks_clear(hdev
);
4216 hci_remote_oob_data_clear(hdev
);
4217 hci_bdaddr_list_clear(&hdev
->le_white_list
);
4218 hci_conn_params_clear_all(hdev
);
4219 hci_dev_unlock(hdev
);
4223 ida_simple_remove(&hci_index_ida
, id
);
4225 EXPORT_SYMBOL(hci_unregister_dev
);
4227 /* Suspend HCI device */
4228 int hci_suspend_dev(struct hci_dev
*hdev
)
4230 hci_notify(hdev
, HCI_DEV_SUSPEND
);
4233 EXPORT_SYMBOL(hci_suspend_dev
);
4235 /* Resume HCI device */
4236 int hci_resume_dev(struct hci_dev
*hdev
)
4238 hci_notify(hdev
, HCI_DEV_RESUME
);
4241 EXPORT_SYMBOL(hci_resume_dev
);
4243 /* Receive frame from HCI drivers */
4244 int hci_recv_frame(struct hci_dev
*hdev
, struct sk_buff
*skb
)
4246 if (!hdev
|| (!test_bit(HCI_UP
, &hdev
->flags
)
4247 && !test_bit(HCI_INIT
, &hdev
->flags
))) {
4253 bt_cb(skb
)->incoming
= 1;
4256 __net_timestamp(skb
);
4258 skb_queue_tail(&hdev
->rx_q
, skb
);
4259 queue_work(hdev
->workqueue
, &hdev
->rx_work
);
4263 EXPORT_SYMBOL(hci_recv_frame
);
4265 static int hci_reassembly(struct hci_dev
*hdev
, int type
, void *data
,
4266 int count
, __u8 index
)
4271 struct sk_buff
*skb
;
4272 struct bt_skb_cb
*scb
;
4274 if ((type
< HCI_ACLDATA_PKT
|| type
> HCI_EVENT_PKT
) ||
4275 index
>= NUM_REASSEMBLY
)
4278 skb
= hdev
->reassembly
[index
];
4282 case HCI_ACLDATA_PKT
:
4283 len
= HCI_MAX_FRAME_SIZE
;
4284 hlen
= HCI_ACL_HDR_SIZE
;
4287 len
= HCI_MAX_EVENT_SIZE
;
4288 hlen
= HCI_EVENT_HDR_SIZE
;
4290 case HCI_SCODATA_PKT
:
4291 len
= HCI_MAX_SCO_SIZE
;
4292 hlen
= HCI_SCO_HDR_SIZE
;
4296 skb
= bt_skb_alloc(len
, GFP_ATOMIC
);
4300 scb
= (void *) skb
->cb
;
4302 scb
->pkt_type
= type
;
4304 hdev
->reassembly
[index
] = skb
;
4308 scb
= (void *) skb
->cb
;
4309 len
= min_t(uint
, scb
->expect
, count
);
4311 memcpy(skb_put(skb
, len
), data
, len
);
4320 if (skb
->len
== HCI_EVENT_HDR_SIZE
) {
4321 struct hci_event_hdr
*h
= hci_event_hdr(skb
);
4322 scb
->expect
= h
->plen
;
4324 if (skb_tailroom(skb
) < scb
->expect
) {
4326 hdev
->reassembly
[index
] = NULL
;
4332 case HCI_ACLDATA_PKT
:
4333 if (skb
->len
== HCI_ACL_HDR_SIZE
) {
4334 struct hci_acl_hdr
*h
= hci_acl_hdr(skb
);
4335 scb
->expect
= __le16_to_cpu(h
->dlen
);
4337 if (skb_tailroom(skb
) < scb
->expect
) {
4339 hdev
->reassembly
[index
] = NULL
;
4345 case HCI_SCODATA_PKT
:
4346 if (skb
->len
== HCI_SCO_HDR_SIZE
) {
4347 struct hci_sco_hdr
*h
= hci_sco_hdr(skb
);
4348 scb
->expect
= h
->dlen
;
4350 if (skb_tailroom(skb
) < scb
->expect
) {
4352 hdev
->reassembly
[index
] = NULL
;
4359 if (scb
->expect
== 0) {
4360 /* Complete frame */
4362 bt_cb(skb
)->pkt_type
= type
;
4363 hci_recv_frame(hdev
, skb
);
4365 hdev
->reassembly
[index
] = NULL
;
4373 int hci_recv_fragment(struct hci_dev
*hdev
, int type
, void *data
, int count
)
4377 if (type
< HCI_ACLDATA_PKT
|| type
> HCI_EVENT_PKT
)
4381 rem
= hci_reassembly(hdev
, type
, data
, count
, type
- 1);
4385 data
+= (count
- rem
);
4391 EXPORT_SYMBOL(hci_recv_fragment
);
4393 #define STREAM_REASSEMBLY 0
4395 int hci_recv_stream_fragment(struct hci_dev
*hdev
, void *data
, int count
)
4401 struct sk_buff
*skb
= hdev
->reassembly
[STREAM_REASSEMBLY
];
4404 struct { char type
; } *pkt
;
4406 /* Start of the frame */
4413 type
= bt_cb(skb
)->pkt_type
;
4415 rem
= hci_reassembly(hdev
, type
, data
, count
,
4420 data
+= (count
- rem
);
4426 EXPORT_SYMBOL(hci_recv_stream_fragment
);
4428 /* ---- Interface to upper protocols ---- */
4430 int hci_register_cb(struct hci_cb
*cb
)
4432 BT_DBG("%p name %s", cb
, cb
->name
);
4434 write_lock(&hci_cb_list_lock
);
4435 list_add(&cb
->list
, &hci_cb_list
);
4436 write_unlock(&hci_cb_list_lock
);
4440 EXPORT_SYMBOL(hci_register_cb
);
4442 int hci_unregister_cb(struct hci_cb
*cb
)
4444 BT_DBG("%p name %s", cb
, cb
->name
);
4446 write_lock(&hci_cb_list_lock
);
4447 list_del(&cb
->list
);
4448 write_unlock(&hci_cb_list_lock
);
4452 EXPORT_SYMBOL(hci_unregister_cb
);
4454 static void hci_send_frame(struct hci_dev
*hdev
, struct sk_buff
*skb
)
4458 BT_DBG("%s type %d len %d", hdev
->name
, bt_cb(skb
)->pkt_type
, skb
->len
);
4461 __net_timestamp(skb
);
4463 /* Send copy to monitor */
4464 hci_send_to_monitor(hdev
, skb
);
4466 if (atomic_read(&hdev
->promisc
)) {
4467 /* Send copy to the sockets */
4468 hci_send_to_sock(hdev
, skb
);
4471 /* Get rid of skb owner, prior to sending to the driver. */
4474 err
= hdev
->send(hdev
, skb
);
4476 BT_ERR("%s sending frame failed (%d)", hdev
->name
, err
);
4481 void hci_req_init(struct hci_request
*req
, struct hci_dev
*hdev
)
4483 skb_queue_head_init(&req
->cmd_q
);
4488 int hci_req_run(struct hci_request
*req
, hci_req_complete_t complete
)
4490 struct hci_dev
*hdev
= req
->hdev
;
4491 struct sk_buff
*skb
;
4492 unsigned long flags
;
4494 BT_DBG("length %u", skb_queue_len(&req
->cmd_q
));
4496 /* If an error occured during request building, remove all HCI
4497 * commands queued on the HCI request queue.
4500 skb_queue_purge(&req
->cmd_q
);
4504 /* Do not allow empty requests */
4505 if (skb_queue_empty(&req
->cmd_q
))
4508 skb
= skb_peek_tail(&req
->cmd_q
);
4509 bt_cb(skb
)->req
.complete
= complete
;
4511 spin_lock_irqsave(&hdev
->cmd_q
.lock
, flags
);
4512 skb_queue_splice_tail(&req
->cmd_q
, &hdev
->cmd_q
);
4513 spin_unlock_irqrestore(&hdev
->cmd_q
.lock
, flags
);
4515 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
4520 bool hci_req_pending(struct hci_dev
*hdev
)
4522 return (hdev
->req_status
== HCI_REQ_PEND
);
4525 static struct sk_buff
*hci_prepare_cmd(struct hci_dev
*hdev
, u16 opcode
,
4526 u32 plen
, const void *param
)
4528 int len
= HCI_COMMAND_HDR_SIZE
+ plen
;
4529 struct hci_command_hdr
*hdr
;
4530 struct sk_buff
*skb
;
4532 skb
= bt_skb_alloc(len
, GFP_ATOMIC
);
4536 hdr
= (struct hci_command_hdr
*) skb_put(skb
, HCI_COMMAND_HDR_SIZE
);
4537 hdr
->opcode
= cpu_to_le16(opcode
);
4541 memcpy(skb_put(skb
, plen
), param
, plen
);
4543 BT_DBG("skb len %d", skb
->len
);
4545 bt_cb(skb
)->pkt_type
= HCI_COMMAND_PKT
;
4550 /* Send HCI command */
4551 int hci_send_cmd(struct hci_dev
*hdev
, __u16 opcode
, __u32 plen
,
4554 struct sk_buff
*skb
;
4556 BT_DBG("%s opcode 0x%4.4x plen %d", hdev
->name
, opcode
, plen
);
4558 skb
= hci_prepare_cmd(hdev
, opcode
, plen
, param
);
4560 BT_ERR("%s no memory for command", hdev
->name
);
4564 /* Stand-alone HCI commands must be flaged as
4565 * single-command requests.
4567 bt_cb(skb
)->req
.start
= true;
4569 skb_queue_tail(&hdev
->cmd_q
, skb
);
4570 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
4575 /* Queue a command to an asynchronous HCI request */
4576 void hci_req_add_ev(struct hci_request
*req
, u16 opcode
, u32 plen
,
4577 const void *param
, u8 event
)
4579 struct hci_dev
*hdev
= req
->hdev
;
4580 struct sk_buff
*skb
;
4582 BT_DBG("%s opcode 0x%4.4x plen %d", hdev
->name
, opcode
, plen
);
4584 /* If an error occured during request building, there is no point in
4585 * queueing the HCI command. We can simply return.
4590 skb
= hci_prepare_cmd(hdev
, opcode
, plen
, param
);
4592 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
4593 hdev
->name
, opcode
);
4598 if (skb_queue_empty(&req
->cmd_q
))
4599 bt_cb(skb
)->req
.start
= true;
4601 bt_cb(skb
)->req
.event
= event
;
4603 skb_queue_tail(&req
->cmd_q
, skb
);
4606 void hci_req_add(struct hci_request
*req
, u16 opcode
, u32 plen
,
4609 hci_req_add_ev(req
, opcode
, plen
, param
, 0);
4612 /* Get data from the previously sent command */
4613 void *hci_sent_cmd_data(struct hci_dev
*hdev
, __u16 opcode
)
4615 struct hci_command_hdr
*hdr
;
4617 if (!hdev
->sent_cmd
)
4620 hdr
= (void *) hdev
->sent_cmd
->data
;
4622 if (hdr
->opcode
!= cpu_to_le16(opcode
))
4625 BT_DBG("%s opcode 0x%4.4x", hdev
->name
, opcode
);
4627 return hdev
->sent_cmd
->data
+ HCI_COMMAND_HDR_SIZE
;
4631 static void hci_add_acl_hdr(struct sk_buff
*skb
, __u16 handle
, __u16 flags
)
4633 struct hci_acl_hdr
*hdr
;
4636 skb_push(skb
, HCI_ACL_HDR_SIZE
);
4637 skb_reset_transport_header(skb
);
4638 hdr
= (struct hci_acl_hdr
*)skb_transport_header(skb
);
4639 hdr
->handle
= cpu_to_le16(hci_handle_pack(handle
, flags
));
4640 hdr
->dlen
= cpu_to_le16(len
);
4643 static void hci_queue_acl(struct hci_chan
*chan
, struct sk_buff_head
*queue
,
4644 struct sk_buff
*skb
, __u16 flags
)
4646 struct hci_conn
*conn
= chan
->conn
;
4647 struct hci_dev
*hdev
= conn
->hdev
;
4648 struct sk_buff
*list
;
4650 skb
->len
= skb_headlen(skb
);
4653 bt_cb(skb
)->pkt_type
= HCI_ACLDATA_PKT
;
4655 switch (hdev
->dev_type
) {
4657 hci_add_acl_hdr(skb
, conn
->handle
, flags
);
4660 hci_add_acl_hdr(skb
, chan
->handle
, flags
);
4663 BT_ERR("%s unknown dev_type %d", hdev
->name
, hdev
->dev_type
);
4667 list
= skb_shinfo(skb
)->frag_list
;
4669 /* Non fragmented */
4670 BT_DBG("%s nonfrag skb %p len %d", hdev
->name
, skb
, skb
->len
);
4672 skb_queue_tail(queue
, skb
);
4675 BT_DBG("%s frag %p len %d", hdev
->name
, skb
, skb
->len
);
4677 skb_shinfo(skb
)->frag_list
= NULL
;
4679 /* Queue all fragments atomically */
4680 spin_lock(&queue
->lock
);
4682 __skb_queue_tail(queue
, skb
);
4684 flags
&= ~ACL_START
;
4687 skb
= list
; list
= list
->next
;
4689 bt_cb(skb
)->pkt_type
= HCI_ACLDATA_PKT
;
4690 hci_add_acl_hdr(skb
, conn
->handle
, flags
);
4692 BT_DBG("%s frag %p len %d", hdev
->name
, skb
, skb
->len
);
4694 __skb_queue_tail(queue
, skb
);
4697 spin_unlock(&queue
->lock
);
4701 void hci_send_acl(struct hci_chan
*chan
, struct sk_buff
*skb
, __u16 flags
)
4703 struct hci_dev
*hdev
= chan
->conn
->hdev
;
4705 BT_DBG("%s chan %p flags 0x%4.4x", hdev
->name
, chan
, flags
);
4707 hci_queue_acl(chan
, &chan
->data_q
, skb
, flags
);
4709 queue_work(hdev
->workqueue
, &hdev
->tx_work
);
4713 void hci_send_sco(struct hci_conn
*conn
, struct sk_buff
*skb
)
4715 struct hci_dev
*hdev
= conn
->hdev
;
4716 struct hci_sco_hdr hdr
;
4718 BT_DBG("%s len %d", hdev
->name
, skb
->len
);
4720 hdr
.handle
= cpu_to_le16(conn
->handle
);
4721 hdr
.dlen
= skb
->len
;
4723 skb_push(skb
, HCI_SCO_HDR_SIZE
);
4724 skb_reset_transport_header(skb
);
4725 memcpy(skb_transport_header(skb
), &hdr
, HCI_SCO_HDR_SIZE
);
4727 bt_cb(skb
)->pkt_type
= HCI_SCODATA_PKT
;
4729 skb_queue_tail(&conn
->data_q
, skb
);
4730 queue_work(hdev
->workqueue
, &hdev
->tx_work
);
4733 /* ---- HCI TX task (outgoing data) ---- */
4735 /* HCI Connection scheduler */
4736 static struct hci_conn
*hci_low_sent(struct hci_dev
*hdev
, __u8 type
,
4739 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
4740 struct hci_conn
*conn
= NULL
, *c
;
4741 unsigned int num
= 0, min
= ~0;
4743 /* We don't have to lock device here. Connections are always
4744 * added and removed with TX task disabled. */
4748 list_for_each_entry_rcu(c
, &h
->list
, list
) {
4749 if (c
->type
!= type
|| skb_queue_empty(&c
->data_q
))
4752 if (c
->state
!= BT_CONNECTED
&& c
->state
!= BT_CONFIG
)
4757 if (c
->sent
< min
) {
4762 if (hci_conn_num(hdev
, type
) == num
)
4771 switch (conn
->type
) {
4773 cnt
= hdev
->acl_cnt
;
4777 cnt
= hdev
->sco_cnt
;
4780 cnt
= hdev
->le_mtu
? hdev
->le_cnt
: hdev
->acl_cnt
;
4784 BT_ERR("Unknown link type");
4792 BT_DBG("conn %p quote %d", conn
, *quote
);
4796 static void hci_link_tx_to(struct hci_dev
*hdev
, __u8 type
)
4798 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
4801 BT_ERR("%s link tx timeout", hdev
->name
);
4805 /* Kill stalled connections */
4806 list_for_each_entry_rcu(c
, &h
->list
, list
) {
4807 if (c
->type
== type
&& c
->sent
) {
4808 BT_ERR("%s killing stalled connection %pMR",
4809 hdev
->name
, &c
->dst
);
4810 hci_disconnect(c
, HCI_ERROR_REMOTE_USER_TERM
);
4817 static struct hci_chan
*hci_chan_sent(struct hci_dev
*hdev
, __u8 type
,
4820 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
4821 struct hci_chan
*chan
= NULL
;
4822 unsigned int num
= 0, min
= ~0, cur_prio
= 0;
4823 struct hci_conn
*conn
;
4824 int cnt
, q
, conn_num
= 0;
4826 BT_DBG("%s", hdev
->name
);
4830 list_for_each_entry_rcu(conn
, &h
->list
, list
) {
4831 struct hci_chan
*tmp
;
4833 if (conn
->type
!= type
)
4836 if (conn
->state
!= BT_CONNECTED
&& conn
->state
!= BT_CONFIG
)
4841 list_for_each_entry_rcu(tmp
, &conn
->chan_list
, list
) {
4842 struct sk_buff
*skb
;
4844 if (skb_queue_empty(&tmp
->data_q
))
4847 skb
= skb_peek(&tmp
->data_q
);
4848 if (skb
->priority
< cur_prio
)
4851 if (skb
->priority
> cur_prio
) {
4854 cur_prio
= skb
->priority
;
4859 if (conn
->sent
< min
) {
4865 if (hci_conn_num(hdev
, type
) == conn_num
)
4874 switch (chan
->conn
->type
) {
4876 cnt
= hdev
->acl_cnt
;
4879 cnt
= hdev
->block_cnt
;
4883 cnt
= hdev
->sco_cnt
;
4886 cnt
= hdev
->le_mtu
? hdev
->le_cnt
: hdev
->acl_cnt
;
4890 BT_ERR("Unknown link type");
4895 BT_DBG("chan %p quote %d", chan
, *quote
);
4899 static void hci_prio_recalculate(struct hci_dev
*hdev
, __u8 type
)
4901 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
4902 struct hci_conn
*conn
;
4905 BT_DBG("%s", hdev
->name
);
4909 list_for_each_entry_rcu(conn
, &h
->list
, list
) {
4910 struct hci_chan
*chan
;
4912 if (conn
->type
!= type
)
4915 if (conn
->state
!= BT_CONNECTED
&& conn
->state
!= BT_CONFIG
)
4920 list_for_each_entry_rcu(chan
, &conn
->chan_list
, list
) {
4921 struct sk_buff
*skb
;
4928 if (skb_queue_empty(&chan
->data_q
))
4931 skb
= skb_peek(&chan
->data_q
);
4932 if (skb
->priority
>= HCI_PRIO_MAX
- 1)
4935 skb
->priority
= HCI_PRIO_MAX
- 1;
4937 BT_DBG("chan %p skb %p promoted to %d", chan
, skb
,
4941 if (hci_conn_num(hdev
, type
) == num
)
4949 static inline int __get_blocks(struct hci_dev
*hdev
, struct sk_buff
*skb
)
4951 /* Calculate count of blocks used by this packet */
4952 return DIV_ROUND_UP(skb
->len
- HCI_ACL_HDR_SIZE
, hdev
->block_len
);
4955 static void __check_timeout(struct hci_dev
*hdev
, unsigned int cnt
)
4957 if (!test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
)) {
4958 /* ACL tx timeout must be longer than maximum
4959 * link supervision timeout (40.9 seconds) */
4960 if (!cnt
&& time_after(jiffies
, hdev
->acl_last_tx
+
4961 HCI_ACL_TX_TIMEOUT
))
4962 hci_link_tx_to(hdev
, ACL_LINK
);
4966 static void hci_sched_acl_pkt(struct hci_dev
*hdev
)
4968 unsigned int cnt
= hdev
->acl_cnt
;
4969 struct hci_chan
*chan
;
4970 struct sk_buff
*skb
;
4973 __check_timeout(hdev
, cnt
);
4975 while (hdev
->acl_cnt
&&
4976 (chan
= hci_chan_sent(hdev
, ACL_LINK
, "e
))) {
4977 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
4978 while (quote
-- && (skb
= skb_peek(&chan
->data_q
))) {
4979 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
4980 skb
->len
, skb
->priority
);
4982 /* Stop if priority has changed */
4983 if (skb
->priority
< priority
)
4986 skb
= skb_dequeue(&chan
->data_q
);
4988 hci_conn_enter_active_mode(chan
->conn
,
4989 bt_cb(skb
)->force_active
);
4991 hci_send_frame(hdev
, skb
);
4992 hdev
->acl_last_tx
= jiffies
;
5000 if (cnt
!= hdev
->acl_cnt
)
5001 hci_prio_recalculate(hdev
, ACL_LINK
);
5004 static void hci_sched_acl_blk(struct hci_dev
*hdev
)
5006 unsigned int cnt
= hdev
->block_cnt
;
5007 struct hci_chan
*chan
;
5008 struct sk_buff
*skb
;
5012 __check_timeout(hdev
, cnt
);
5014 BT_DBG("%s", hdev
->name
);
5016 if (hdev
->dev_type
== HCI_AMP
)
5021 while (hdev
->block_cnt
> 0 &&
5022 (chan
= hci_chan_sent(hdev
, type
, "e
))) {
5023 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
5024 while (quote
> 0 && (skb
= skb_peek(&chan
->data_q
))) {
5027 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
5028 skb
->len
, skb
->priority
);
5030 /* Stop if priority has changed */
5031 if (skb
->priority
< priority
)
5034 skb
= skb_dequeue(&chan
->data_q
);
5036 blocks
= __get_blocks(hdev
, skb
);
5037 if (blocks
> hdev
->block_cnt
)
5040 hci_conn_enter_active_mode(chan
->conn
,
5041 bt_cb(skb
)->force_active
);
5043 hci_send_frame(hdev
, skb
);
5044 hdev
->acl_last_tx
= jiffies
;
5046 hdev
->block_cnt
-= blocks
;
5049 chan
->sent
+= blocks
;
5050 chan
->conn
->sent
+= blocks
;
5054 if (cnt
!= hdev
->block_cnt
)
5055 hci_prio_recalculate(hdev
, type
);
5058 static void hci_sched_acl(struct hci_dev
*hdev
)
5060 BT_DBG("%s", hdev
->name
);
5062 /* No ACL link over BR/EDR controller */
5063 if (!hci_conn_num(hdev
, ACL_LINK
) && hdev
->dev_type
== HCI_BREDR
)
5066 /* No AMP link over AMP controller */
5067 if (!hci_conn_num(hdev
, AMP_LINK
) && hdev
->dev_type
== HCI_AMP
)
5070 switch (hdev
->flow_ctl_mode
) {
5071 case HCI_FLOW_CTL_MODE_PACKET_BASED
:
5072 hci_sched_acl_pkt(hdev
);
5075 case HCI_FLOW_CTL_MODE_BLOCK_BASED
:
5076 hci_sched_acl_blk(hdev
);
5082 static void hci_sched_sco(struct hci_dev
*hdev
)
5084 struct hci_conn
*conn
;
5085 struct sk_buff
*skb
;
5088 BT_DBG("%s", hdev
->name
);
5090 if (!hci_conn_num(hdev
, SCO_LINK
))
5093 while (hdev
->sco_cnt
&& (conn
= hci_low_sent(hdev
, SCO_LINK
, "e
))) {
5094 while (quote
-- && (skb
= skb_dequeue(&conn
->data_q
))) {
5095 BT_DBG("skb %p len %d", skb
, skb
->len
);
5096 hci_send_frame(hdev
, skb
);
5099 if (conn
->sent
== ~0)
5105 static void hci_sched_esco(struct hci_dev
*hdev
)
5107 struct hci_conn
*conn
;
5108 struct sk_buff
*skb
;
5111 BT_DBG("%s", hdev
->name
);
5113 if (!hci_conn_num(hdev
, ESCO_LINK
))
5116 while (hdev
->sco_cnt
&& (conn
= hci_low_sent(hdev
, ESCO_LINK
,
5118 while (quote
-- && (skb
= skb_dequeue(&conn
->data_q
))) {
5119 BT_DBG("skb %p len %d", skb
, skb
->len
);
5120 hci_send_frame(hdev
, skb
);
5123 if (conn
->sent
== ~0)
5129 static void hci_sched_le(struct hci_dev
*hdev
)
5131 struct hci_chan
*chan
;
5132 struct sk_buff
*skb
;
5133 int quote
, cnt
, tmp
;
5135 BT_DBG("%s", hdev
->name
);
5137 if (!hci_conn_num(hdev
, LE_LINK
))
5140 if (!test_bit(HCI_UNCONFIGURED
, &hdev
->dev_flags
)) {
5141 /* LE tx timeout must be longer than maximum
5142 * link supervision timeout (40.9 seconds) */
5143 if (!hdev
->le_cnt
&& hdev
->le_pkts
&&
5144 time_after(jiffies
, hdev
->le_last_tx
+ HZ
* 45))
5145 hci_link_tx_to(hdev
, LE_LINK
);
5148 cnt
= hdev
->le_pkts
? hdev
->le_cnt
: hdev
->acl_cnt
;
5150 while (cnt
&& (chan
= hci_chan_sent(hdev
, LE_LINK
, "e
))) {
5151 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
5152 while (quote
-- && (skb
= skb_peek(&chan
->data_q
))) {
5153 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
5154 skb
->len
, skb
->priority
);
5156 /* Stop if priority has changed */
5157 if (skb
->priority
< priority
)
5160 skb
= skb_dequeue(&chan
->data_q
);
5162 hci_send_frame(hdev
, skb
);
5163 hdev
->le_last_tx
= jiffies
;
5174 hdev
->acl_cnt
= cnt
;
5177 hci_prio_recalculate(hdev
, LE_LINK
);
5180 static void hci_tx_work(struct work_struct
*work
)
5182 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, tx_work
);
5183 struct sk_buff
*skb
;
5185 BT_DBG("%s acl %d sco %d le %d", hdev
->name
, hdev
->acl_cnt
,
5186 hdev
->sco_cnt
, hdev
->le_cnt
);
5188 if (!test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
5189 /* Schedule queues and send stuff to HCI driver */
5190 hci_sched_acl(hdev
);
5191 hci_sched_sco(hdev
);
5192 hci_sched_esco(hdev
);
5196 /* Send next queued raw (unknown type) packet */
5197 while ((skb
= skb_dequeue(&hdev
->raw_q
)))
5198 hci_send_frame(hdev
, skb
);
5201 /* ----- HCI RX task (incoming data processing) ----- */
5203 /* ACL data packet */
5204 static void hci_acldata_packet(struct hci_dev
*hdev
, struct sk_buff
*skb
)
5206 struct hci_acl_hdr
*hdr
= (void *) skb
->data
;
5207 struct hci_conn
*conn
;
5208 __u16 handle
, flags
;
5210 skb_pull(skb
, HCI_ACL_HDR_SIZE
);
5212 handle
= __le16_to_cpu(hdr
->handle
);
5213 flags
= hci_flags(handle
);
5214 handle
= hci_handle(handle
);
5216 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev
->name
, skb
->len
,
5219 hdev
->stat
.acl_rx
++;
5222 conn
= hci_conn_hash_lookup_handle(hdev
, handle
);
5223 hci_dev_unlock(hdev
);
5226 hci_conn_enter_active_mode(conn
, BT_POWER_FORCE_ACTIVE_OFF
);
5228 /* Send to upper protocol */
5229 l2cap_recv_acldata(conn
, skb
, flags
);
5232 BT_ERR("%s ACL packet for unknown connection handle %d",
5233 hdev
->name
, handle
);
5239 /* SCO data packet */
5240 static void hci_scodata_packet(struct hci_dev
*hdev
, struct sk_buff
*skb
)
5242 struct hci_sco_hdr
*hdr
= (void *) skb
->data
;
5243 struct hci_conn
*conn
;
5246 skb_pull(skb
, HCI_SCO_HDR_SIZE
);
5248 handle
= __le16_to_cpu(hdr
->handle
);
5250 BT_DBG("%s len %d handle 0x%4.4x", hdev
->name
, skb
->len
, handle
);
5252 hdev
->stat
.sco_rx
++;
5255 conn
= hci_conn_hash_lookup_handle(hdev
, handle
);
5256 hci_dev_unlock(hdev
);
5259 /* Send to upper protocol */
5260 sco_recv_scodata(conn
, skb
);
5263 BT_ERR("%s SCO packet for unknown connection handle %d",
5264 hdev
->name
, handle
);
5270 static bool hci_req_is_complete(struct hci_dev
*hdev
)
5272 struct sk_buff
*skb
;
5274 skb
= skb_peek(&hdev
->cmd_q
);
5278 return bt_cb(skb
)->req
.start
;
5281 static void hci_resend_last(struct hci_dev
*hdev
)
5283 struct hci_command_hdr
*sent
;
5284 struct sk_buff
*skb
;
5287 if (!hdev
->sent_cmd
)
5290 sent
= (void *) hdev
->sent_cmd
->data
;
5291 opcode
= __le16_to_cpu(sent
->opcode
);
5292 if (opcode
== HCI_OP_RESET
)
5295 skb
= skb_clone(hdev
->sent_cmd
, GFP_KERNEL
);
5299 skb_queue_head(&hdev
->cmd_q
, skb
);
5300 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
5303 void hci_req_cmd_complete(struct hci_dev
*hdev
, u16 opcode
, u8 status
)
5305 hci_req_complete_t req_complete
= NULL
;
5306 struct sk_buff
*skb
;
5307 unsigned long flags
;
5309 BT_DBG("opcode 0x%04x status 0x%02x", opcode
, status
);
5311 /* If the completed command doesn't match the last one that was
5312 * sent we need to do special handling of it.
5314 if (!hci_sent_cmd_data(hdev
, opcode
)) {
5315 /* Some CSR based controllers generate a spontaneous
5316 * reset complete event during init and any pending
5317 * command will never be completed. In such a case we
5318 * need to resend whatever was the last sent
5321 if (test_bit(HCI_INIT
, &hdev
->flags
) && opcode
== HCI_OP_RESET
)
5322 hci_resend_last(hdev
);
5327 /* If the command succeeded and there's still more commands in
5328 * this request the request is not yet complete.
5330 if (!status
&& !hci_req_is_complete(hdev
))
5333 /* If this was the last command in a request the complete
5334 * callback would be found in hdev->sent_cmd instead of the
5335 * command queue (hdev->cmd_q).
5337 if (hdev
->sent_cmd
) {
5338 req_complete
= bt_cb(hdev
->sent_cmd
)->req
.complete
;
5341 /* We must set the complete callback to NULL to
5342 * avoid calling the callback more than once if
5343 * this function gets called again.
5345 bt_cb(hdev
->sent_cmd
)->req
.complete
= NULL
;
5351 /* Remove all pending commands belonging to this request */
5352 spin_lock_irqsave(&hdev
->cmd_q
.lock
, flags
);
5353 while ((skb
= __skb_dequeue(&hdev
->cmd_q
))) {
5354 if (bt_cb(skb
)->req
.start
) {
5355 __skb_queue_head(&hdev
->cmd_q
, skb
);
5359 req_complete
= bt_cb(skb
)->req
.complete
;
5362 spin_unlock_irqrestore(&hdev
->cmd_q
.lock
, flags
);
5366 req_complete(hdev
, status
);
5369 static void hci_rx_work(struct work_struct
*work
)
5371 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, rx_work
);
5372 struct sk_buff
*skb
;
5374 BT_DBG("%s", hdev
->name
);
5376 while ((skb
= skb_dequeue(&hdev
->rx_q
))) {
5377 /* Send copy to monitor */
5378 hci_send_to_monitor(hdev
, skb
);
5380 if (atomic_read(&hdev
->promisc
)) {
5381 /* Send copy to the sockets */
5382 hci_send_to_sock(hdev
, skb
);
5385 if (test_bit(HCI_USER_CHANNEL
, &hdev
->dev_flags
)) {
5390 if (test_bit(HCI_INIT
, &hdev
->flags
)) {
5391 /* Don't process data packets in this states. */
5392 switch (bt_cb(skb
)->pkt_type
) {
5393 case HCI_ACLDATA_PKT
:
5394 case HCI_SCODATA_PKT
:
5401 switch (bt_cb(skb
)->pkt_type
) {
5403 BT_DBG("%s Event packet", hdev
->name
);
5404 hci_event_packet(hdev
, skb
);
5407 case HCI_ACLDATA_PKT
:
5408 BT_DBG("%s ACL data packet", hdev
->name
);
5409 hci_acldata_packet(hdev
, skb
);
5412 case HCI_SCODATA_PKT
:
5413 BT_DBG("%s SCO data packet", hdev
->name
);
5414 hci_scodata_packet(hdev
, skb
);
5424 static void hci_cmd_work(struct work_struct
*work
)
5426 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, cmd_work
);
5427 struct sk_buff
*skb
;
5429 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev
->name
,
5430 atomic_read(&hdev
->cmd_cnt
), skb_queue_len(&hdev
->cmd_q
));
5432 /* Send queued commands */
5433 if (atomic_read(&hdev
->cmd_cnt
)) {
5434 skb
= skb_dequeue(&hdev
->cmd_q
);
5438 kfree_skb(hdev
->sent_cmd
);
5440 hdev
->sent_cmd
= skb_clone(skb
, GFP_KERNEL
);
5441 if (hdev
->sent_cmd
) {
5442 atomic_dec(&hdev
->cmd_cnt
);
5443 hci_send_frame(hdev
, skb
);
5444 if (test_bit(HCI_RESET
, &hdev
->flags
))
5445 cancel_delayed_work(&hdev
->cmd_timer
);
5447 schedule_delayed_work(&hdev
->cmd_timer
,
5450 skb_queue_head(&hdev
->cmd_q
, skb
);
5451 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
5456 void hci_req_add_le_scan_disable(struct hci_request
*req
)
5458 struct hci_cp_le_set_scan_enable cp
;
5460 memset(&cp
, 0, sizeof(cp
));
5461 cp
.enable
= LE_SCAN_DISABLE
;
5462 hci_req_add(req
, HCI_OP_LE_SET_SCAN_ENABLE
, sizeof(cp
), &cp
);
5465 static void add_to_white_list(struct hci_request
*req
,
5466 struct hci_conn_params
*params
)
5468 struct hci_cp_le_add_to_white_list cp
;
5470 cp
.bdaddr_type
= params
->addr_type
;
5471 bacpy(&cp
.bdaddr
, ¶ms
->addr
);
5473 hci_req_add(req
, HCI_OP_LE_ADD_TO_WHITE_LIST
, sizeof(cp
), &cp
);
5476 static u8
update_white_list(struct hci_request
*req
)
5478 struct hci_dev
*hdev
= req
->hdev
;
5479 struct hci_conn_params
*params
;
5480 struct bdaddr_list
*b
;
5481 uint8_t white_list_entries
= 0;
5483 /* Go through the current white list programmed into the
5484 * controller one by one and check if that address is still
5485 * in the list of pending connections or list of devices to
5486 * report. If not present in either list, then queue the
5487 * command to remove it from the controller.
5489 list_for_each_entry(b
, &hdev
->le_white_list
, list
) {
5490 struct hci_cp_le_del_from_white_list cp
;
5492 if (hci_pend_le_action_lookup(&hdev
->pend_le_conns
,
5493 &b
->bdaddr
, b
->bdaddr_type
) ||
5494 hci_pend_le_action_lookup(&hdev
->pend_le_reports
,
5495 &b
->bdaddr
, b
->bdaddr_type
)) {
5496 white_list_entries
++;
5500 cp
.bdaddr_type
= b
->bdaddr_type
;
5501 bacpy(&cp
.bdaddr
, &b
->bdaddr
);
5503 hci_req_add(req
, HCI_OP_LE_DEL_FROM_WHITE_LIST
,
5507 /* Since all no longer valid white list entries have been
5508 * removed, walk through the list of pending connections
5509 * and ensure that any new device gets programmed into
5512 * If the list of the devices is larger than the list of
5513 * available white list entries in the controller, then
5514 * just abort and return filer policy value to not use the
5517 list_for_each_entry(params
, &hdev
->pend_le_conns
, action
) {
5518 if (hci_bdaddr_list_lookup(&hdev
->le_white_list
,
5519 ¶ms
->addr
, params
->addr_type
))
5522 if (white_list_entries
>= hdev
->le_white_list_size
) {
5523 /* Select filter policy to accept all advertising */
5527 if (hci_find_irk_by_addr(hdev
, ¶ms
->addr
,
5528 params
->addr_type
)) {
5529 /* White list can not be used with RPAs */
5533 white_list_entries
++;
5534 add_to_white_list(req
, params
);
5537 /* After adding all new pending connections, walk through
5538 * the list of pending reports and also add these to the
5539 * white list if there is still space.
5541 list_for_each_entry(params
, &hdev
->pend_le_reports
, action
) {
5542 if (hci_bdaddr_list_lookup(&hdev
->le_white_list
,
5543 ¶ms
->addr
, params
->addr_type
))
5546 if (white_list_entries
>= hdev
->le_white_list_size
) {
5547 /* Select filter policy to accept all advertising */
5551 if (hci_find_irk_by_addr(hdev
, ¶ms
->addr
,
5552 params
->addr_type
)) {
5553 /* White list can not be used with RPAs */
5557 white_list_entries
++;
5558 add_to_white_list(req
, params
);
5561 /* Select filter policy to use white list */
5565 void hci_req_add_le_passive_scan(struct hci_request
*req
)
5567 struct hci_cp_le_set_scan_param param_cp
;
5568 struct hci_cp_le_set_scan_enable enable_cp
;
5569 struct hci_dev
*hdev
= req
->hdev
;
5573 /* Set require_privacy to false since no SCAN_REQ are send
5574 * during passive scanning. Not using an unresolvable address
5575 * here is important so that peer devices using direct
5576 * advertising with our address will be correctly reported
5577 * by the controller.
5579 if (hci_update_random_address(req
, false, &own_addr_type
))
5582 /* Adding or removing entries from the white list must
5583 * happen before enabling scanning. The controller does
5584 * not allow white list modification while scanning.
5586 filter_policy
= update_white_list(req
);
5588 memset(¶m_cp
, 0, sizeof(param_cp
));
5589 param_cp
.type
= LE_SCAN_PASSIVE
;
5590 param_cp
.interval
= cpu_to_le16(hdev
->le_scan_interval
);
5591 param_cp
.window
= cpu_to_le16(hdev
->le_scan_window
);
5592 param_cp
.own_address_type
= own_addr_type
;
5593 param_cp
.filter_policy
= filter_policy
;
5594 hci_req_add(req
, HCI_OP_LE_SET_SCAN_PARAM
, sizeof(param_cp
),
5597 memset(&enable_cp
, 0, sizeof(enable_cp
));
5598 enable_cp
.enable
= LE_SCAN_ENABLE
;
5599 enable_cp
.filter_dup
= LE_SCAN_FILTER_DUP_ENABLE
;
5600 hci_req_add(req
, HCI_OP_LE_SET_SCAN_ENABLE
, sizeof(enable_cp
),
5604 static void update_background_scan_complete(struct hci_dev
*hdev
, u8 status
)
5607 BT_DBG("HCI request failed to update background scanning: "
5608 "status 0x%2.2x", status
);
5611 /* This function controls the background scanning based on hdev->pend_le_conns
5612 * list. If there are pending LE connection we start the background scanning,
5613 * otherwise we stop it.
5615 * This function requires the caller holds hdev->lock.
5617 void hci_update_background_scan(struct hci_dev
*hdev
)
5619 struct hci_request req
;
5620 struct hci_conn
*conn
;
5623 if (!test_bit(HCI_UP
, &hdev
->flags
) ||
5624 test_bit(HCI_INIT
, &hdev
->flags
) ||
5625 test_bit(HCI_SETUP
, &hdev
->dev_flags
) ||
5626 test_bit(HCI_CONFIG
, &hdev
->dev_flags
) ||
5627 test_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
) ||
5628 test_bit(HCI_UNREGISTER
, &hdev
->dev_flags
))
5631 /* No point in doing scanning if LE support hasn't been enabled */
5632 if (!test_bit(HCI_LE_ENABLED
, &hdev
->dev_flags
))
5635 /* If discovery is active don't interfere with it */
5636 if (hdev
->discovery
.state
!= DISCOVERY_STOPPED
)
5639 hci_req_init(&req
, hdev
);
5641 if (list_empty(&hdev
->pend_le_conns
) &&
5642 list_empty(&hdev
->pend_le_reports
)) {
5643 /* If there is no pending LE connections or devices
5644 * to be scanned for, we should stop the background
5648 /* If controller is not scanning we are done. */
5649 if (!test_bit(HCI_LE_SCAN
, &hdev
->dev_flags
))
5652 hci_req_add_le_scan_disable(&req
);
5654 BT_DBG("%s stopping background scanning", hdev
->name
);
5656 /* If there is at least one pending LE connection, we should
5657 * keep the background scan running.
5660 /* If controller is connecting, we should not start scanning
5661 * since some controllers are not able to scan and connect at
5664 conn
= hci_conn_hash_lookup_state(hdev
, LE_LINK
, BT_CONNECT
);
5668 /* If controller is currently scanning, we stop it to ensure we
5669 * don't miss any advertising (due to duplicates filter).
5671 if (test_bit(HCI_LE_SCAN
, &hdev
->dev_flags
))
5672 hci_req_add_le_scan_disable(&req
);
5674 hci_req_add_le_passive_scan(&req
);
5676 BT_DBG("%s starting background scanning", hdev
->name
);
5679 err
= hci_req_run(&req
, update_background_scan_complete
);
5681 BT_ERR("Failed to run HCI request: err %d", err
);