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>
40 #include "hci_request.h"
41 #include "hci_debugfs.h"
44 static void hci_rx_work(struct work_struct
*work
);
45 static void hci_cmd_work(struct work_struct
*work
);
46 static void hci_tx_work(struct work_struct
*work
);
49 LIST_HEAD(hci_dev_list
);
50 DEFINE_RWLOCK(hci_dev_list_lock
);
52 /* HCI callback list */
53 LIST_HEAD(hci_cb_list
);
54 DEFINE_MUTEX(hci_cb_list_lock
);
56 /* HCI ID Numbering */
57 static DEFINE_IDA(hci_index_ida
);
59 /* ----- HCI requests ----- */
61 #define HCI_REQ_DONE 0
62 #define HCI_REQ_PEND 1
63 #define HCI_REQ_CANCELED 2
65 #define hci_req_lock(d) mutex_lock(&d->req_lock)
66 #define hci_req_unlock(d) mutex_unlock(&d->req_lock)
68 /* ---- HCI notifications ---- */
70 static void hci_notify(struct hci_dev
*hdev
, int event
)
72 hci_sock_dev_event(hdev
, event
);
75 /* ---- HCI debugfs entries ---- */
77 static ssize_t
dut_mode_read(struct file
*file
, char __user
*user_buf
,
78 size_t count
, loff_t
*ppos
)
80 struct hci_dev
*hdev
= file
->private_data
;
83 buf
[0] = hci_dev_test_flag(hdev
, HCI_DUT_MODE
) ? 'Y': 'N';
86 return simple_read_from_buffer(user_buf
, count
, ppos
, buf
, 2);
89 static ssize_t
dut_mode_write(struct file
*file
, const char __user
*user_buf
,
90 size_t count
, loff_t
*ppos
)
92 struct hci_dev
*hdev
= file
->private_data
;
95 size_t buf_size
= min(count
, (sizeof(buf
)-1));
98 if (!test_bit(HCI_UP
, &hdev
->flags
))
101 if (copy_from_user(buf
, user_buf
, buf_size
))
104 buf
[buf_size
] = '\0';
105 if (strtobool(buf
, &enable
))
108 if (enable
== hci_dev_test_flag(hdev
, HCI_DUT_MODE
))
113 skb
= __hci_cmd_sync(hdev
, HCI_OP_ENABLE_DUT_MODE
, 0, NULL
,
116 skb
= __hci_cmd_sync(hdev
, HCI_OP_RESET
, 0, NULL
,
118 hci_req_unlock(hdev
);
125 hci_dev_change_flag(hdev
, HCI_DUT_MODE
);
130 static const struct file_operations dut_mode_fops
= {
132 .read
= dut_mode_read
,
133 .write
= dut_mode_write
,
134 .llseek
= default_llseek
,
137 /* ---- HCI requests ---- */
139 static void hci_req_sync_complete(struct hci_dev
*hdev
, u8 result
, u16 opcode
,
142 BT_DBG("%s result 0x%2.2x", hdev
->name
, result
);
144 if (hdev
->req_status
== HCI_REQ_PEND
) {
145 hdev
->req_result
= result
;
146 hdev
->req_status
= HCI_REQ_DONE
;
148 hdev
->req_skb
= skb_get(skb
);
149 wake_up_interruptible(&hdev
->req_wait_q
);
153 static void hci_req_cancel(struct hci_dev
*hdev
, int err
)
155 BT_DBG("%s err 0x%2.2x", hdev
->name
, err
);
157 if (hdev
->req_status
== HCI_REQ_PEND
) {
158 hdev
->req_result
= err
;
159 hdev
->req_status
= HCI_REQ_CANCELED
;
160 wake_up_interruptible(&hdev
->req_wait_q
);
164 struct sk_buff
*__hci_cmd_sync_ev(struct hci_dev
*hdev
, u16 opcode
, u32 plen
,
165 const void *param
, u8 event
, u32 timeout
)
167 DECLARE_WAITQUEUE(wait
, current
);
168 struct hci_request req
;
172 BT_DBG("%s", hdev
->name
);
174 hci_req_init(&req
, hdev
);
176 hci_req_add_ev(&req
, opcode
, plen
, param
, event
);
178 hdev
->req_status
= HCI_REQ_PEND
;
180 add_wait_queue(&hdev
->req_wait_q
, &wait
);
181 set_current_state(TASK_INTERRUPTIBLE
);
183 err
= hci_req_run_skb(&req
, hci_req_sync_complete
);
185 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
186 set_current_state(TASK_RUNNING
);
190 schedule_timeout(timeout
);
192 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
194 if (signal_pending(current
))
195 return ERR_PTR(-EINTR
);
197 switch (hdev
->req_status
) {
199 err
= -bt_to_errno(hdev
->req_result
);
202 case HCI_REQ_CANCELED
:
203 err
= -hdev
->req_result
;
211 hdev
->req_status
= hdev
->req_result
= 0;
213 hdev
->req_skb
= NULL
;
215 BT_DBG("%s end: err %d", hdev
->name
, err
);
223 return ERR_PTR(-ENODATA
);
227 EXPORT_SYMBOL(__hci_cmd_sync_ev
);
229 struct sk_buff
*__hci_cmd_sync(struct hci_dev
*hdev
, u16 opcode
, u32 plen
,
230 const void *param
, u32 timeout
)
232 return __hci_cmd_sync_ev(hdev
, opcode
, plen
, param
, 0, timeout
);
234 EXPORT_SYMBOL(__hci_cmd_sync
);
236 /* Execute request and wait for completion. */
237 static int __hci_req_sync(struct hci_dev
*hdev
,
238 void (*func
)(struct hci_request
*req
,
240 unsigned long opt
, __u32 timeout
)
242 struct hci_request req
;
243 DECLARE_WAITQUEUE(wait
, current
);
246 BT_DBG("%s start", hdev
->name
);
248 hci_req_init(&req
, hdev
);
250 hdev
->req_status
= HCI_REQ_PEND
;
254 add_wait_queue(&hdev
->req_wait_q
, &wait
);
255 set_current_state(TASK_INTERRUPTIBLE
);
257 err
= hci_req_run_skb(&req
, hci_req_sync_complete
);
259 hdev
->req_status
= 0;
261 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
262 set_current_state(TASK_RUNNING
);
264 /* ENODATA means the HCI request command queue is empty.
265 * This can happen when a request with conditionals doesn't
266 * trigger any commands to be sent. This is normal behavior
267 * and should not trigger an error return.
275 schedule_timeout(timeout
);
277 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
279 if (signal_pending(current
))
282 switch (hdev
->req_status
) {
284 err
= -bt_to_errno(hdev
->req_result
);
287 case HCI_REQ_CANCELED
:
288 err
= -hdev
->req_result
;
296 hdev
->req_status
= hdev
->req_result
= 0;
298 BT_DBG("%s end: err %d", hdev
->name
, err
);
303 static int hci_req_sync(struct hci_dev
*hdev
,
304 void (*req
)(struct hci_request
*req
,
306 unsigned long opt
, __u32 timeout
)
310 if (!test_bit(HCI_UP
, &hdev
->flags
))
313 /* Serialize all requests */
315 ret
= __hci_req_sync(hdev
, req
, opt
, timeout
);
316 hci_req_unlock(hdev
);
321 static void hci_reset_req(struct hci_request
*req
, unsigned long opt
)
323 BT_DBG("%s %ld", req
->hdev
->name
, opt
);
326 set_bit(HCI_RESET
, &req
->hdev
->flags
);
327 hci_req_add(req
, HCI_OP_RESET
, 0, NULL
);
330 static void bredr_init(struct hci_request
*req
)
332 req
->hdev
->flow_ctl_mode
= HCI_FLOW_CTL_MODE_PACKET_BASED
;
334 /* Read Local Supported Features */
335 hci_req_add(req
, HCI_OP_READ_LOCAL_FEATURES
, 0, NULL
);
337 /* Read Local Version */
338 hci_req_add(req
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
340 /* Read BD Address */
341 hci_req_add(req
, HCI_OP_READ_BD_ADDR
, 0, NULL
);
344 static void amp_init1(struct hci_request
*req
)
346 req
->hdev
->flow_ctl_mode
= HCI_FLOW_CTL_MODE_BLOCK_BASED
;
348 /* Read Local Version */
349 hci_req_add(req
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
351 /* Read Local Supported Commands */
352 hci_req_add(req
, HCI_OP_READ_LOCAL_COMMANDS
, 0, NULL
);
354 /* Read Local AMP Info */
355 hci_req_add(req
, HCI_OP_READ_LOCAL_AMP_INFO
, 0, NULL
);
357 /* Read Data Blk size */
358 hci_req_add(req
, HCI_OP_READ_DATA_BLOCK_SIZE
, 0, NULL
);
360 /* Read Flow Control Mode */
361 hci_req_add(req
, HCI_OP_READ_FLOW_CONTROL_MODE
, 0, NULL
);
363 /* Read Location Data */
364 hci_req_add(req
, HCI_OP_READ_LOCATION_DATA
, 0, NULL
);
367 static void amp_init2(struct hci_request
*req
)
369 /* Read Local Supported Features. Not all AMP controllers
370 * support this so it's placed conditionally in the second
373 if (req
->hdev
->commands
[14] & 0x20)
374 hci_req_add(req
, HCI_OP_READ_LOCAL_FEATURES
, 0, NULL
);
377 static void hci_init1_req(struct hci_request
*req
, unsigned long opt
)
379 struct hci_dev
*hdev
= req
->hdev
;
381 BT_DBG("%s %ld", hdev
->name
, opt
);
384 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
))
385 hci_reset_req(req
, 0);
387 switch (hdev
->dev_type
) {
397 BT_ERR("Unknown device type %d", hdev
->dev_type
);
402 static void bredr_setup(struct hci_request
*req
)
407 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
408 hci_req_add(req
, HCI_OP_READ_BUFFER_SIZE
, 0, NULL
);
410 /* Read Class of Device */
411 hci_req_add(req
, HCI_OP_READ_CLASS_OF_DEV
, 0, NULL
);
413 /* Read Local Name */
414 hci_req_add(req
, HCI_OP_READ_LOCAL_NAME
, 0, NULL
);
416 /* Read Voice Setting */
417 hci_req_add(req
, HCI_OP_READ_VOICE_SETTING
, 0, NULL
);
419 /* Read Number of Supported IAC */
420 hci_req_add(req
, HCI_OP_READ_NUM_SUPPORTED_IAC
, 0, NULL
);
422 /* Read Current IAC LAP */
423 hci_req_add(req
, HCI_OP_READ_CURRENT_IAC_LAP
, 0, NULL
);
425 /* Clear Event Filters */
426 flt_type
= HCI_FLT_CLEAR_ALL
;
427 hci_req_add(req
, HCI_OP_SET_EVENT_FLT
, 1, &flt_type
);
429 /* Connection accept timeout ~20 secs */
430 param
= cpu_to_le16(0x7d00);
431 hci_req_add(req
, HCI_OP_WRITE_CA_TIMEOUT
, 2, ¶m
);
434 static void le_setup(struct hci_request
*req
)
436 struct hci_dev
*hdev
= req
->hdev
;
438 /* Read LE Buffer Size */
439 hci_req_add(req
, HCI_OP_LE_READ_BUFFER_SIZE
, 0, NULL
);
441 /* Read LE Local Supported Features */
442 hci_req_add(req
, HCI_OP_LE_READ_LOCAL_FEATURES
, 0, NULL
);
444 /* Read LE Supported States */
445 hci_req_add(req
, HCI_OP_LE_READ_SUPPORTED_STATES
, 0, NULL
);
447 /* Read LE White List Size */
448 hci_req_add(req
, HCI_OP_LE_READ_WHITE_LIST_SIZE
, 0, NULL
);
450 /* Clear LE White List */
451 hci_req_add(req
, HCI_OP_LE_CLEAR_WHITE_LIST
, 0, NULL
);
453 /* LE-only controllers have LE implicitly enabled */
454 if (!lmp_bredr_capable(hdev
))
455 hci_dev_set_flag(hdev
, HCI_LE_ENABLED
);
458 static void hci_setup_event_mask(struct hci_request
*req
)
460 struct hci_dev
*hdev
= req
->hdev
;
462 /* The second byte is 0xff instead of 0x9f (two reserved bits
463 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
466 u8 events
[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
468 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
469 * any event mask for pre 1.2 devices.
471 if (hdev
->hci_ver
< BLUETOOTH_VER_1_2
)
474 if (lmp_bredr_capable(hdev
)) {
475 events
[4] |= 0x01; /* Flow Specification Complete */
476 events
[4] |= 0x02; /* Inquiry Result with RSSI */
477 events
[4] |= 0x04; /* Read Remote Extended Features Complete */
478 events
[5] |= 0x08; /* Synchronous Connection Complete */
479 events
[5] |= 0x10; /* Synchronous Connection Changed */
481 /* Use a different default for LE-only devices */
482 memset(events
, 0, sizeof(events
));
483 events
[0] |= 0x10; /* Disconnection Complete */
484 events
[1] |= 0x08; /* Read Remote Version Information Complete */
485 events
[1] |= 0x20; /* Command Complete */
486 events
[1] |= 0x40; /* Command Status */
487 events
[1] |= 0x80; /* Hardware Error */
488 events
[2] |= 0x04; /* Number of Completed Packets */
489 events
[3] |= 0x02; /* Data Buffer Overflow */
491 if (hdev
->le_features
[0] & HCI_LE_ENCRYPTION
) {
492 events
[0] |= 0x80; /* Encryption Change */
493 events
[5] |= 0x80; /* Encryption Key Refresh Complete */
497 if (lmp_inq_rssi_capable(hdev
))
498 events
[4] |= 0x02; /* Inquiry Result with RSSI */
500 if (lmp_sniffsubr_capable(hdev
))
501 events
[5] |= 0x20; /* Sniff Subrating */
503 if (lmp_pause_enc_capable(hdev
))
504 events
[5] |= 0x80; /* Encryption Key Refresh Complete */
506 if (lmp_ext_inq_capable(hdev
))
507 events
[5] |= 0x40; /* Extended Inquiry Result */
509 if (lmp_no_flush_capable(hdev
))
510 events
[7] |= 0x01; /* Enhanced Flush Complete */
512 if (lmp_lsto_capable(hdev
))
513 events
[6] |= 0x80; /* Link Supervision Timeout Changed */
515 if (lmp_ssp_capable(hdev
)) {
516 events
[6] |= 0x01; /* IO Capability Request */
517 events
[6] |= 0x02; /* IO Capability Response */
518 events
[6] |= 0x04; /* User Confirmation Request */
519 events
[6] |= 0x08; /* User Passkey Request */
520 events
[6] |= 0x10; /* Remote OOB Data Request */
521 events
[6] |= 0x20; /* Simple Pairing Complete */
522 events
[7] |= 0x04; /* User Passkey Notification */
523 events
[7] |= 0x08; /* Keypress Notification */
524 events
[7] |= 0x10; /* Remote Host Supported
525 * Features Notification
529 if (lmp_le_capable(hdev
))
530 events
[7] |= 0x20; /* LE Meta-Event */
532 hci_req_add(req
, HCI_OP_SET_EVENT_MASK
, sizeof(events
), events
);
535 static void hci_init2_req(struct hci_request
*req
, unsigned long opt
)
537 struct hci_dev
*hdev
= req
->hdev
;
539 if (hdev
->dev_type
== HCI_AMP
)
540 return amp_init2(req
);
542 if (lmp_bredr_capable(hdev
))
545 hci_dev_clear_flag(hdev
, HCI_BREDR_ENABLED
);
547 if (lmp_le_capable(hdev
))
550 /* All Bluetooth 1.2 and later controllers should support the
551 * HCI command for reading the local supported commands.
553 * Unfortunately some controllers indicate Bluetooth 1.2 support,
554 * but do not have support for this command. If that is the case,
555 * the driver can quirk the behavior and skip reading the local
556 * supported commands.
558 if (hdev
->hci_ver
> BLUETOOTH_VER_1_1
&&
559 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS
, &hdev
->quirks
))
560 hci_req_add(req
, HCI_OP_READ_LOCAL_COMMANDS
, 0, NULL
);
562 if (lmp_ssp_capable(hdev
)) {
563 /* When SSP is available, then the host features page
564 * should also be available as well. However some
565 * controllers list the max_page as 0 as long as SSP
566 * has not been enabled. To achieve proper debugging
567 * output, force the minimum max_page to 1 at least.
569 hdev
->max_page
= 0x01;
571 if (hci_dev_test_flag(hdev
, HCI_SSP_ENABLED
)) {
574 hci_req_add(req
, HCI_OP_WRITE_SSP_MODE
,
575 sizeof(mode
), &mode
);
577 struct hci_cp_write_eir cp
;
579 memset(hdev
->eir
, 0, sizeof(hdev
->eir
));
580 memset(&cp
, 0, sizeof(cp
));
582 hci_req_add(req
, HCI_OP_WRITE_EIR
, sizeof(cp
), &cp
);
586 if (lmp_inq_rssi_capable(hdev
) ||
587 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE
, &hdev
->quirks
)) {
590 /* If Extended Inquiry Result events are supported, then
591 * they are clearly preferred over Inquiry Result with RSSI
594 mode
= lmp_ext_inq_capable(hdev
) ? 0x02 : 0x01;
596 hci_req_add(req
, HCI_OP_WRITE_INQUIRY_MODE
, 1, &mode
);
599 if (lmp_inq_tx_pwr_capable(hdev
))
600 hci_req_add(req
, HCI_OP_READ_INQ_RSP_TX_POWER
, 0, NULL
);
602 if (lmp_ext_feat_capable(hdev
)) {
603 struct hci_cp_read_local_ext_features cp
;
606 hci_req_add(req
, HCI_OP_READ_LOCAL_EXT_FEATURES
,
610 if (hci_dev_test_flag(hdev
, HCI_LINK_SECURITY
)) {
612 hci_req_add(req
, HCI_OP_WRITE_AUTH_ENABLE
, sizeof(enable
),
617 static void hci_setup_link_policy(struct hci_request
*req
)
619 struct hci_dev
*hdev
= req
->hdev
;
620 struct hci_cp_write_def_link_policy cp
;
623 if (lmp_rswitch_capable(hdev
))
624 link_policy
|= HCI_LP_RSWITCH
;
625 if (lmp_hold_capable(hdev
))
626 link_policy
|= HCI_LP_HOLD
;
627 if (lmp_sniff_capable(hdev
))
628 link_policy
|= HCI_LP_SNIFF
;
629 if (lmp_park_capable(hdev
))
630 link_policy
|= HCI_LP_PARK
;
632 cp
.policy
= cpu_to_le16(link_policy
);
633 hci_req_add(req
, HCI_OP_WRITE_DEF_LINK_POLICY
, sizeof(cp
), &cp
);
636 static void hci_set_le_support(struct hci_request
*req
)
638 struct hci_dev
*hdev
= req
->hdev
;
639 struct hci_cp_write_le_host_supported cp
;
641 /* LE-only devices do not support explicit enablement */
642 if (!lmp_bredr_capable(hdev
))
645 memset(&cp
, 0, sizeof(cp
));
647 if (hci_dev_test_flag(hdev
, HCI_LE_ENABLED
)) {
652 if (cp
.le
!= lmp_host_le_capable(hdev
))
653 hci_req_add(req
, HCI_OP_WRITE_LE_HOST_SUPPORTED
, sizeof(cp
),
657 static void hci_set_event_mask_page_2(struct hci_request
*req
)
659 struct hci_dev
*hdev
= req
->hdev
;
660 u8 events
[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
662 /* If Connectionless Slave Broadcast master role is supported
663 * enable all necessary events for it.
665 if (lmp_csb_master_capable(hdev
)) {
666 events
[1] |= 0x40; /* Triggered Clock Capture */
667 events
[1] |= 0x80; /* Synchronization Train Complete */
668 events
[2] |= 0x10; /* Slave Page Response Timeout */
669 events
[2] |= 0x20; /* CSB Channel Map Change */
672 /* If Connectionless Slave Broadcast slave role is supported
673 * enable all necessary events for it.
675 if (lmp_csb_slave_capable(hdev
)) {
676 events
[2] |= 0x01; /* Synchronization Train Received */
677 events
[2] |= 0x02; /* CSB Receive */
678 events
[2] |= 0x04; /* CSB Timeout */
679 events
[2] |= 0x08; /* Truncated Page Complete */
682 /* Enable Authenticated Payload Timeout Expired event if supported */
683 if (lmp_ping_capable(hdev
) || hdev
->le_features
[0] & HCI_LE_PING
)
686 hci_req_add(req
, HCI_OP_SET_EVENT_MASK_PAGE_2
, sizeof(events
), events
);
689 static void hci_init3_req(struct hci_request
*req
, unsigned long opt
)
691 struct hci_dev
*hdev
= req
->hdev
;
694 hci_setup_event_mask(req
);
696 if (hdev
->commands
[6] & 0x20 &&
697 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY
, &hdev
->quirks
)) {
698 struct hci_cp_read_stored_link_key cp
;
700 bacpy(&cp
.bdaddr
, BDADDR_ANY
);
702 hci_req_add(req
, HCI_OP_READ_STORED_LINK_KEY
, sizeof(cp
), &cp
);
705 if (hdev
->commands
[5] & 0x10)
706 hci_setup_link_policy(req
);
708 if (hdev
->commands
[8] & 0x01)
709 hci_req_add(req
, HCI_OP_READ_PAGE_SCAN_ACTIVITY
, 0, NULL
);
711 /* Some older Broadcom based Bluetooth 1.2 controllers do not
712 * support the Read Page Scan Type command. Check support for
713 * this command in the bit mask of supported commands.
715 if (hdev
->commands
[13] & 0x01)
716 hci_req_add(req
, HCI_OP_READ_PAGE_SCAN_TYPE
, 0, NULL
);
718 if (lmp_le_capable(hdev
)) {
721 memset(events
, 0, sizeof(events
));
724 if (hdev
->le_features
[0] & HCI_LE_ENCRYPTION
)
725 events
[0] |= 0x10; /* LE Long Term Key Request */
727 /* If controller supports the Connection Parameters Request
728 * Link Layer Procedure, enable the corresponding event.
730 if (hdev
->le_features
[0] & HCI_LE_CONN_PARAM_REQ_PROC
)
731 events
[0] |= 0x20; /* LE Remote Connection
735 /* If the controller supports the Data Length Extension
736 * feature, enable the corresponding event.
738 if (hdev
->le_features
[0] & HCI_LE_DATA_LEN_EXT
)
739 events
[0] |= 0x40; /* LE Data Length Change */
741 /* If the controller supports Extended Scanner Filter
742 * Policies, enable the correspondig event.
744 if (hdev
->le_features
[0] & HCI_LE_EXT_SCAN_POLICY
)
745 events
[1] |= 0x04; /* LE Direct Advertising
749 /* If the controller supports the LE Read Local P-256
750 * Public Key command, enable the corresponding event.
752 if (hdev
->commands
[34] & 0x02)
753 events
[0] |= 0x80; /* LE Read Local P-256
754 * Public Key Complete
757 /* If the controller supports the LE Generate DHKey
758 * command, enable the corresponding event.
760 if (hdev
->commands
[34] & 0x04)
761 events
[1] |= 0x01; /* LE Generate DHKey Complete */
763 hci_req_add(req
, HCI_OP_LE_SET_EVENT_MASK
, sizeof(events
),
766 if (hdev
->commands
[25] & 0x40) {
767 /* Read LE Advertising Channel TX Power */
768 hci_req_add(req
, HCI_OP_LE_READ_ADV_TX_POWER
, 0, NULL
);
771 if (hdev
->le_features
[0] & HCI_LE_DATA_LEN_EXT
) {
772 /* Read LE Maximum Data Length */
773 hci_req_add(req
, HCI_OP_LE_READ_MAX_DATA_LEN
, 0, NULL
);
775 /* Read LE Suggested Default Data Length */
776 hci_req_add(req
, HCI_OP_LE_READ_DEF_DATA_LEN
, 0, NULL
);
779 hci_set_le_support(req
);
782 /* Read features beyond page 1 if available */
783 for (p
= 2; p
< HCI_MAX_PAGES
&& p
<= hdev
->max_page
; p
++) {
784 struct hci_cp_read_local_ext_features cp
;
787 hci_req_add(req
, HCI_OP_READ_LOCAL_EXT_FEATURES
,
792 static void hci_init4_req(struct hci_request
*req
, unsigned long opt
)
794 struct hci_dev
*hdev
= req
->hdev
;
796 /* Some Broadcom based Bluetooth controllers do not support the
797 * Delete Stored Link Key command. They are clearly indicating its
798 * absence in the bit mask of supported commands.
800 * Check the supported commands and only if the the command is marked
801 * as supported send it. If not supported assume that the controller
802 * does not have actual support for stored link keys which makes this
803 * command redundant anyway.
805 * Some controllers indicate that they support handling deleting
806 * stored link keys, but they don't. The quirk lets a driver
807 * just disable this command.
809 if (hdev
->commands
[6] & 0x80 &&
810 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY
, &hdev
->quirks
)) {
811 struct hci_cp_delete_stored_link_key cp
;
813 bacpy(&cp
.bdaddr
, BDADDR_ANY
);
814 cp
.delete_all
= 0x01;
815 hci_req_add(req
, HCI_OP_DELETE_STORED_LINK_KEY
,
819 /* Set event mask page 2 if the HCI command for it is supported */
820 if (hdev
->commands
[22] & 0x04)
821 hci_set_event_mask_page_2(req
);
823 /* Read local codec list if the HCI command is supported */
824 if (hdev
->commands
[29] & 0x20)
825 hci_req_add(req
, HCI_OP_READ_LOCAL_CODECS
, 0, NULL
);
827 /* Get MWS transport configuration if the HCI command is supported */
828 if (hdev
->commands
[30] & 0x08)
829 hci_req_add(req
, HCI_OP_GET_MWS_TRANSPORT_CONFIG
, 0, NULL
);
831 /* Check for Synchronization Train support */
832 if (lmp_sync_train_capable(hdev
))
833 hci_req_add(req
, HCI_OP_READ_SYNC_TRAIN_PARAMS
, 0, NULL
);
835 /* Enable Secure Connections if supported and configured */
836 if (hci_dev_test_flag(hdev
, HCI_SSP_ENABLED
) &&
837 bredr_sc_enabled(hdev
)) {
840 hci_req_add(req
, HCI_OP_WRITE_SC_SUPPORT
,
841 sizeof(support
), &support
);
845 static int __hci_init(struct hci_dev
*hdev
)
849 err
= __hci_req_sync(hdev
, hci_init1_req
, 0, HCI_INIT_TIMEOUT
);
853 /* The Device Under Test (DUT) mode is special and available for
854 * all controller types. So just create it early on.
856 if (hci_dev_test_flag(hdev
, HCI_SETUP
)) {
857 debugfs_create_file("dut_mode", 0644, hdev
->debugfs
, hdev
,
861 err
= __hci_req_sync(hdev
, hci_init2_req
, 0, HCI_INIT_TIMEOUT
);
865 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
866 * BR/EDR/LE type controllers. AMP controllers only need the
867 * first two stages of init.
869 if (hdev
->dev_type
!= HCI_BREDR
)
872 err
= __hci_req_sync(hdev
, hci_init3_req
, 0, HCI_INIT_TIMEOUT
);
876 err
= __hci_req_sync(hdev
, hci_init4_req
, 0, HCI_INIT_TIMEOUT
);
880 /* This function is only called when the controller is actually in
881 * configured state. When the controller is marked as unconfigured,
882 * this initialization procedure is not run.
884 * It means that it is possible that a controller runs through its
885 * setup phase and then discovers missing settings. If that is the
886 * case, then this function will not be called. It then will only
887 * be called during the config phase.
889 * So only when in setup phase or config phase, create the debugfs
890 * entries and register the SMP channels.
892 if (!hci_dev_test_flag(hdev
, HCI_SETUP
) &&
893 !hci_dev_test_flag(hdev
, HCI_CONFIG
))
896 hci_debugfs_create_common(hdev
);
898 if (lmp_bredr_capable(hdev
))
899 hci_debugfs_create_bredr(hdev
);
901 if (lmp_le_capable(hdev
))
902 hci_debugfs_create_le(hdev
);
907 static void hci_init0_req(struct hci_request
*req
, unsigned long opt
)
909 struct hci_dev
*hdev
= req
->hdev
;
911 BT_DBG("%s %ld", hdev
->name
, opt
);
914 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
))
915 hci_reset_req(req
, 0);
917 /* Read Local Version */
918 hci_req_add(req
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
920 /* Read BD Address */
921 if (hdev
->set_bdaddr
)
922 hci_req_add(req
, HCI_OP_READ_BD_ADDR
, 0, NULL
);
925 static int __hci_unconf_init(struct hci_dev
*hdev
)
929 if (test_bit(HCI_QUIRK_RAW_DEVICE
, &hdev
->quirks
))
932 err
= __hci_req_sync(hdev
, hci_init0_req
, 0, HCI_INIT_TIMEOUT
);
939 static void hci_scan_req(struct hci_request
*req
, unsigned long opt
)
943 BT_DBG("%s %x", req
->hdev
->name
, scan
);
945 /* Inquiry and Page scans */
946 hci_req_add(req
, HCI_OP_WRITE_SCAN_ENABLE
, 1, &scan
);
949 static void hci_auth_req(struct hci_request
*req
, unsigned long opt
)
953 BT_DBG("%s %x", req
->hdev
->name
, auth
);
956 hci_req_add(req
, HCI_OP_WRITE_AUTH_ENABLE
, 1, &auth
);
959 static void hci_encrypt_req(struct hci_request
*req
, unsigned long opt
)
963 BT_DBG("%s %x", req
->hdev
->name
, encrypt
);
966 hci_req_add(req
, HCI_OP_WRITE_ENCRYPT_MODE
, 1, &encrypt
);
969 static void hci_linkpol_req(struct hci_request
*req
, unsigned long opt
)
971 __le16 policy
= cpu_to_le16(opt
);
973 BT_DBG("%s %x", req
->hdev
->name
, policy
);
975 /* Default link policy */
976 hci_req_add(req
, HCI_OP_WRITE_DEF_LINK_POLICY
, 2, &policy
);
979 /* Get HCI device by index.
980 * Device is held on return. */
981 struct hci_dev
*hci_dev_get(int index
)
983 struct hci_dev
*hdev
= NULL
, *d
;
990 read_lock(&hci_dev_list_lock
);
991 list_for_each_entry(d
, &hci_dev_list
, list
) {
992 if (d
->id
== index
) {
993 hdev
= hci_dev_hold(d
);
997 read_unlock(&hci_dev_list_lock
);
1001 /* ---- Inquiry support ---- */
1003 bool hci_discovery_active(struct hci_dev
*hdev
)
1005 struct discovery_state
*discov
= &hdev
->discovery
;
1007 switch (discov
->state
) {
1008 case DISCOVERY_FINDING
:
1009 case DISCOVERY_RESOLVING
:
1017 void hci_discovery_set_state(struct hci_dev
*hdev
, int state
)
1019 int old_state
= hdev
->discovery
.state
;
1021 BT_DBG("%s state %u -> %u", hdev
->name
, hdev
->discovery
.state
, state
);
1023 if (old_state
== state
)
1026 hdev
->discovery
.state
= state
;
1029 case DISCOVERY_STOPPED
:
1030 hci_update_background_scan(hdev
);
1032 if (old_state
!= DISCOVERY_STARTING
)
1033 mgmt_discovering(hdev
, 0);
1035 case DISCOVERY_STARTING
:
1037 case DISCOVERY_FINDING
:
1038 mgmt_discovering(hdev
, 1);
1040 case DISCOVERY_RESOLVING
:
1042 case DISCOVERY_STOPPING
:
1047 void hci_inquiry_cache_flush(struct hci_dev
*hdev
)
1049 struct discovery_state
*cache
= &hdev
->discovery
;
1050 struct inquiry_entry
*p
, *n
;
1052 list_for_each_entry_safe(p
, n
, &cache
->all
, all
) {
1057 INIT_LIST_HEAD(&cache
->unknown
);
1058 INIT_LIST_HEAD(&cache
->resolve
);
1061 struct inquiry_entry
*hci_inquiry_cache_lookup(struct hci_dev
*hdev
,
1064 struct discovery_state
*cache
= &hdev
->discovery
;
1065 struct inquiry_entry
*e
;
1067 BT_DBG("cache %p, %pMR", cache
, bdaddr
);
1069 list_for_each_entry(e
, &cache
->all
, all
) {
1070 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
1077 struct inquiry_entry
*hci_inquiry_cache_lookup_unknown(struct hci_dev
*hdev
,
1080 struct discovery_state
*cache
= &hdev
->discovery
;
1081 struct inquiry_entry
*e
;
1083 BT_DBG("cache %p, %pMR", cache
, bdaddr
);
1085 list_for_each_entry(e
, &cache
->unknown
, list
) {
1086 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
1093 struct inquiry_entry
*hci_inquiry_cache_lookup_resolve(struct hci_dev
*hdev
,
1097 struct discovery_state
*cache
= &hdev
->discovery
;
1098 struct inquiry_entry
*e
;
1100 BT_DBG("cache %p bdaddr %pMR state %d", cache
, bdaddr
, state
);
1102 list_for_each_entry(e
, &cache
->resolve
, list
) {
1103 if (!bacmp(bdaddr
, BDADDR_ANY
) && e
->name_state
== state
)
1105 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
1112 void hci_inquiry_cache_update_resolve(struct hci_dev
*hdev
,
1113 struct inquiry_entry
*ie
)
1115 struct discovery_state
*cache
= &hdev
->discovery
;
1116 struct list_head
*pos
= &cache
->resolve
;
1117 struct inquiry_entry
*p
;
1119 list_del(&ie
->list
);
1121 list_for_each_entry(p
, &cache
->resolve
, list
) {
1122 if (p
->name_state
!= NAME_PENDING
&&
1123 abs(p
->data
.rssi
) >= abs(ie
->data
.rssi
))
1128 list_add(&ie
->list
, pos
);
1131 u32
hci_inquiry_cache_update(struct hci_dev
*hdev
, struct inquiry_data
*data
,
1134 struct discovery_state
*cache
= &hdev
->discovery
;
1135 struct inquiry_entry
*ie
;
1138 BT_DBG("cache %p, %pMR", cache
, &data
->bdaddr
);
1140 hci_remove_remote_oob_data(hdev
, &data
->bdaddr
, BDADDR_BREDR
);
1142 if (!data
->ssp_mode
)
1143 flags
|= MGMT_DEV_FOUND_LEGACY_PAIRING
;
1145 ie
= hci_inquiry_cache_lookup(hdev
, &data
->bdaddr
);
1147 if (!ie
->data
.ssp_mode
)
1148 flags
|= MGMT_DEV_FOUND_LEGACY_PAIRING
;
1150 if (ie
->name_state
== NAME_NEEDED
&&
1151 data
->rssi
!= ie
->data
.rssi
) {
1152 ie
->data
.rssi
= data
->rssi
;
1153 hci_inquiry_cache_update_resolve(hdev
, ie
);
1159 /* Entry not in the cache. Add new one. */
1160 ie
= kzalloc(sizeof(*ie
), GFP_KERNEL
);
1162 flags
|= MGMT_DEV_FOUND_CONFIRM_NAME
;
1166 list_add(&ie
->all
, &cache
->all
);
1169 ie
->name_state
= NAME_KNOWN
;
1171 ie
->name_state
= NAME_NOT_KNOWN
;
1172 list_add(&ie
->list
, &cache
->unknown
);
1176 if (name_known
&& ie
->name_state
!= NAME_KNOWN
&&
1177 ie
->name_state
!= NAME_PENDING
) {
1178 ie
->name_state
= NAME_KNOWN
;
1179 list_del(&ie
->list
);
1182 memcpy(&ie
->data
, data
, sizeof(*data
));
1183 ie
->timestamp
= jiffies
;
1184 cache
->timestamp
= jiffies
;
1186 if (ie
->name_state
== NAME_NOT_KNOWN
)
1187 flags
|= MGMT_DEV_FOUND_CONFIRM_NAME
;
1193 static int inquiry_cache_dump(struct hci_dev
*hdev
, int num
, __u8
*buf
)
1195 struct discovery_state
*cache
= &hdev
->discovery
;
1196 struct inquiry_info
*info
= (struct inquiry_info
*) buf
;
1197 struct inquiry_entry
*e
;
1200 list_for_each_entry(e
, &cache
->all
, all
) {
1201 struct inquiry_data
*data
= &e
->data
;
1206 bacpy(&info
->bdaddr
, &data
->bdaddr
);
1207 info
->pscan_rep_mode
= data
->pscan_rep_mode
;
1208 info
->pscan_period_mode
= data
->pscan_period_mode
;
1209 info
->pscan_mode
= data
->pscan_mode
;
1210 memcpy(info
->dev_class
, data
->dev_class
, 3);
1211 info
->clock_offset
= data
->clock_offset
;
1217 BT_DBG("cache %p, copied %d", cache
, copied
);
1221 static void hci_inq_req(struct hci_request
*req
, unsigned long opt
)
1223 struct hci_inquiry_req
*ir
= (struct hci_inquiry_req
*) opt
;
1224 struct hci_dev
*hdev
= req
->hdev
;
1225 struct hci_cp_inquiry cp
;
1227 BT_DBG("%s", hdev
->name
);
1229 if (test_bit(HCI_INQUIRY
, &hdev
->flags
))
1233 memcpy(&cp
.lap
, &ir
->lap
, 3);
1234 cp
.length
= ir
->length
;
1235 cp
.num_rsp
= ir
->num_rsp
;
1236 hci_req_add(req
, HCI_OP_INQUIRY
, sizeof(cp
), &cp
);
1239 int hci_inquiry(void __user
*arg
)
1241 __u8 __user
*ptr
= arg
;
1242 struct hci_inquiry_req ir
;
1243 struct hci_dev
*hdev
;
1244 int err
= 0, do_inquiry
= 0, max_rsp
;
1248 if (copy_from_user(&ir
, ptr
, sizeof(ir
)))
1251 hdev
= hci_dev_get(ir
.dev_id
);
1255 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
1260 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
)) {
1265 if (hdev
->dev_type
!= HCI_BREDR
) {
1270 if (!hci_dev_test_flag(hdev
, HCI_BREDR_ENABLED
)) {
1276 if (inquiry_cache_age(hdev
) > INQUIRY_CACHE_AGE_MAX
||
1277 inquiry_cache_empty(hdev
) || ir
.flags
& IREQ_CACHE_FLUSH
) {
1278 hci_inquiry_cache_flush(hdev
);
1281 hci_dev_unlock(hdev
);
1283 timeo
= ir
.length
* msecs_to_jiffies(2000);
1286 err
= hci_req_sync(hdev
, hci_inq_req
, (unsigned long) &ir
,
1291 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1292 * cleared). If it is interrupted by a signal, return -EINTR.
1294 if (wait_on_bit(&hdev
->flags
, HCI_INQUIRY
,
1295 TASK_INTERRUPTIBLE
))
1299 /* for unlimited number of responses we will use buffer with
1302 max_rsp
= (ir
.num_rsp
== 0) ? 255 : ir
.num_rsp
;
1304 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1305 * copy it to the user space.
1307 buf
= kmalloc(sizeof(struct inquiry_info
) * max_rsp
, GFP_KERNEL
);
1314 ir
.num_rsp
= inquiry_cache_dump(hdev
, max_rsp
, buf
);
1315 hci_dev_unlock(hdev
);
1317 BT_DBG("num_rsp %d", ir
.num_rsp
);
1319 if (!copy_to_user(ptr
, &ir
, sizeof(ir
))) {
1321 if (copy_to_user(ptr
, buf
, sizeof(struct inquiry_info
) *
1334 static int hci_dev_do_open(struct hci_dev
*hdev
)
1338 BT_DBG("%s %p", hdev
->name
, hdev
);
1342 if (hci_dev_test_flag(hdev
, HCI_UNREGISTER
)) {
1347 if (!hci_dev_test_flag(hdev
, HCI_SETUP
) &&
1348 !hci_dev_test_flag(hdev
, HCI_CONFIG
)) {
1349 /* Check for rfkill but allow the HCI setup stage to
1350 * proceed (which in itself doesn't cause any RF activity).
1352 if (hci_dev_test_flag(hdev
, HCI_RFKILLED
)) {
1357 /* Check for valid public address or a configured static
1358 * random adddress, but let the HCI setup proceed to
1359 * be able to determine if there is a public address
1362 * In case of user channel usage, it is not important
1363 * if a public address or static random address is
1366 * This check is only valid for BR/EDR controllers
1367 * since AMP controllers do not have an address.
1369 if (!hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
) &&
1370 hdev
->dev_type
== HCI_BREDR
&&
1371 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
) &&
1372 !bacmp(&hdev
->static_addr
, BDADDR_ANY
)) {
1373 ret
= -EADDRNOTAVAIL
;
1378 if (test_bit(HCI_UP
, &hdev
->flags
)) {
1383 if (hdev
->open(hdev
)) {
1388 atomic_set(&hdev
->cmd_cnt
, 1);
1389 set_bit(HCI_INIT
, &hdev
->flags
);
1391 if (hci_dev_test_flag(hdev
, HCI_SETUP
)) {
1393 ret
= hdev
->setup(hdev
);
1395 /* The transport driver can set these quirks before
1396 * creating the HCI device or in its setup callback.
1398 * In case any of them is set, the controller has to
1399 * start up as unconfigured.
1401 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG
, &hdev
->quirks
) ||
1402 test_bit(HCI_QUIRK_INVALID_BDADDR
, &hdev
->quirks
))
1403 hci_dev_set_flag(hdev
, HCI_UNCONFIGURED
);
1405 /* For an unconfigured controller it is required to
1406 * read at least the version information provided by
1407 * the Read Local Version Information command.
1409 * If the set_bdaddr driver callback is provided, then
1410 * also the original Bluetooth public device address
1411 * will be read using the Read BD Address command.
1413 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
))
1414 ret
= __hci_unconf_init(hdev
);
1417 if (hci_dev_test_flag(hdev
, HCI_CONFIG
)) {
1418 /* If public address change is configured, ensure that
1419 * the address gets programmed. If the driver does not
1420 * support changing the public address, fail the power
1423 if (bacmp(&hdev
->public_addr
, BDADDR_ANY
) &&
1425 ret
= hdev
->set_bdaddr(hdev
, &hdev
->public_addr
);
1427 ret
= -EADDRNOTAVAIL
;
1431 if (!hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
) &&
1432 !hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
))
1433 ret
= __hci_init(hdev
);
1436 clear_bit(HCI_INIT
, &hdev
->flags
);
1440 hci_dev_set_flag(hdev
, HCI_RPA_EXPIRED
);
1441 set_bit(HCI_UP
, &hdev
->flags
);
1442 hci_notify(hdev
, HCI_DEV_UP
);
1443 if (!hci_dev_test_flag(hdev
, HCI_SETUP
) &&
1444 !hci_dev_test_flag(hdev
, HCI_CONFIG
) &&
1445 !hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
) &&
1446 !hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
) &&
1447 hdev
->dev_type
== HCI_BREDR
) {
1449 mgmt_powered(hdev
, 1);
1450 hci_dev_unlock(hdev
);
1453 /* Init failed, cleanup */
1454 flush_work(&hdev
->tx_work
);
1455 flush_work(&hdev
->cmd_work
);
1456 flush_work(&hdev
->rx_work
);
1458 skb_queue_purge(&hdev
->cmd_q
);
1459 skb_queue_purge(&hdev
->rx_q
);
1464 if (hdev
->sent_cmd
) {
1465 kfree_skb(hdev
->sent_cmd
);
1466 hdev
->sent_cmd
= NULL
;
1470 hdev
->flags
&= BIT(HCI_RAW
);
1474 hci_req_unlock(hdev
);
1478 /* ---- HCI ioctl helpers ---- */
1480 int hci_dev_open(__u16 dev
)
1482 struct hci_dev
*hdev
;
1485 hdev
= hci_dev_get(dev
);
1489 /* Devices that are marked as unconfigured can only be powered
1490 * up as user channel. Trying to bring them up as normal devices
1491 * will result into a failure. Only user channel operation is
1494 * When this function is called for a user channel, the flag
1495 * HCI_USER_CHANNEL will be set first before attempting to
1498 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
) &&
1499 !hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
1504 /* We need to ensure that no other power on/off work is pending
1505 * before proceeding to call hci_dev_do_open. This is
1506 * particularly important if the setup procedure has not yet
1509 if (hci_dev_test_and_clear_flag(hdev
, HCI_AUTO_OFF
))
1510 cancel_delayed_work(&hdev
->power_off
);
1512 /* After this call it is guaranteed that the setup procedure
1513 * has finished. This means that error conditions like RFKILL
1514 * or no valid public or static random address apply.
1516 flush_workqueue(hdev
->req_workqueue
);
1518 /* For controllers not using the management interface and that
1519 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1520 * so that pairing works for them. Once the management interface
1521 * is in use this bit will be cleared again and userspace has
1522 * to explicitly enable it.
1524 if (!hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
) &&
1525 !hci_dev_test_flag(hdev
, HCI_MGMT
))
1526 hci_dev_set_flag(hdev
, HCI_BONDABLE
);
1528 err
= hci_dev_do_open(hdev
);
1535 /* This function requires the caller holds hdev->lock */
1536 static void hci_pend_le_actions_clear(struct hci_dev
*hdev
)
1538 struct hci_conn_params
*p
;
1540 list_for_each_entry(p
, &hdev
->le_conn_params
, list
) {
1542 hci_conn_drop(p
->conn
);
1543 hci_conn_put(p
->conn
);
1546 list_del_init(&p
->action
);
1549 BT_DBG("All LE pending actions cleared");
1552 int hci_dev_do_close(struct hci_dev
*hdev
)
1554 BT_DBG("%s %p", hdev
->name
, hdev
);
1556 if (!hci_dev_test_flag(hdev
, HCI_UNREGISTER
) &&
1557 !hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
) &&
1558 test_bit(HCI_UP
, &hdev
->flags
)) {
1559 /* Execute vendor specific shutdown routine */
1561 hdev
->shutdown(hdev
);
1564 cancel_delayed_work(&hdev
->power_off
);
1566 hci_req_cancel(hdev
, ENODEV
);
1569 if (!test_and_clear_bit(HCI_UP
, &hdev
->flags
)) {
1570 cancel_delayed_work_sync(&hdev
->cmd_timer
);
1571 hci_req_unlock(hdev
);
1575 /* Flush RX and TX works */
1576 flush_work(&hdev
->tx_work
);
1577 flush_work(&hdev
->rx_work
);
1579 if (hdev
->discov_timeout
> 0) {
1580 cancel_delayed_work(&hdev
->discov_off
);
1581 hdev
->discov_timeout
= 0;
1582 hci_dev_clear_flag(hdev
, HCI_DISCOVERABLE
);
1583 hci_dev_clear_flag(hdev
, HCI_LIMITED_DISCOVERABLE
);
1586 if (hci_dev_test_and_clear_flag(hdev
, HCI_SERVICE_CACHE
))
1587 cancel_delayed_work(&hdev
->service_cache
);
1589 cancel_delayed_work_sync(&hdev
->le_scan_disable
);
1590 cancel_delayed_work_sync(&hdev
->le_scan_restart
);
1592 if (hci_dev_test_flag(hdev
, HCI_MGMT
))
1593 cancel_delayed_work_sync(&hdev
->rpa_expired
);
1595 if (hdev
->adv_instance_timeout
) {
1596 cancel_delayed_work_sync(&hdev
->adv_instance_expire
);
1597 hdev
->adv_instance_timeout
= 0;
1600 /* Avoid potential lockdep warnings from the *_flush() calls by
1601 * ensuring the workqueue is empty up front.
1603 drain_workqueue(hdev
->workqueue
);
1607 hci_discovery_set_state(hdev
, DISCOVERY_STOPPED
);
1609 if (!hci_dev_test_and_clear_flag(hdev
, HCI_AUTO_OFF
)) {
1610 if (hdev
->dev_type
== HCI_BREDR
)
1611 mgmt_powered(hdev
, 0);
1614 hci_inquiry_cache_flush(hdev
);
1615 hci_pend_le_actions_clear(hdev
);
1616 hci_conn_hash_flush(hdev
);
1617 hci_dev_unlock(hdev
);
1619 smp_unregister(hdev
);
1621 hci_notify(hdev
, HCI_DEV_DOWN
);
1627 skb_queue_purge(&hdev
->cmd_q
);
1628 atomic_set(&hdev
->cmd_cnt
, 1);
1629 if (!hci_dev_test_flag(hdev
, HCI_AUTO_OFF
) &&
1630 !hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
) &&
1631 test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
)) {
1632 set_bit(HCI_INIT
, &hdev
->flags
);
1633 __hci_req_sync(hdev
, hci_reset_req
, 0, HCI_CMD_TIMEOUT
);
1634 clear_bit(HCI_INIT
, &hdev
->flags
);
1637 /* flush cmd work */
1638 flush_work(&hdev
->cmd_work
);
1641 skb_queue_purge(&hdev
->rx_q
);
1642 skb_queue_purge(&hdev
->cmd_q
);
1643 skb_queue_purge(&hdev
->raw_q
);
1645 /* Drop last sent command */
1646 if (hdev
->sent_cmd
) {
1647 cancel_delayed_work_sync(&hdev
->cmd_timer
);
1648 kfree_skb(hdev
->sent_cmd
);
1649 hdev
->sent_cmd
= NULL
;
1652 /* After this point our queues are empty
1653 * and no tasks are scheduled. */
1657 hdev
->flags
&= BIT(HCI_RAW
);
1658 hci_dev_clear_volatile_flags(hdev
);
1660 /* Controller radio is available but is currently powered down */
1661 hdev
->amp_status
= AMP_STATUS_POWERED_DOWN
;
1663 memset(hdev
->eir
, 0, sizeof(hdev
->eir
));
1664 memset(hdev
->dev_class
, 0, sizeof(hdev
->dev_class
));
1665 bacpy(&hdev
->random_addr
, BDADDR_ANY
);
1667 hci_req_unlock(hdev
);
1673 int hci_dev_close(__u16 dev
)
1675 struct hci_dev
*hdev
;
1678 hdev
= hci_dev_get(dev
);
1682 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
1687 if (hci_dev_test_and_clear_flag(hdev
, HCI_AUTO_OFF
))
1688 cancel_delayed_work(&hdev
->power_off
);
1690 err
= hci_dev_do_close(hdev
);
1697 static int hci_dev_do_reset(struct hci_dev
*hdev
)
1701 BT_DBG("%s %p", hdev
->name
, hdev
);
1706 skb_queue_purge(&hdev
->rx_q
);
1707 skb_queue_purge(&hdev
->cmd_q
);
1709 /* Avoid potential lockdep warnings from the *_flush() calls by
1710 * ensuring the workqueue is empty up front.
1712 drain_workqueue(hdev
->workqueue
);
1715 hci_inquiry_cache_flush(hdev
);
1716 hci_conn_hash_flush(hdev
);
1717 hci_dev_unlock(hdev
);
1722 atomic_set(&hdev
->cmd_cnt
, 1);
1723 hdev
->acl_cnt
= 0; hdev
->sco_cnt
= 0; hdev
->le_cnt
= 0;
1725 ret
= __hci_req_sync(hdev
, hci_reset_req
, 0, HCI_INIT_TIMEOUT
);
1727 hci_req_unlock(hdev
);
1731 int hci_dev_reset(__u16 dev
)
1733 struct hci_dev
*hdev
;
1736 hdev
= hci_dev_get(dev
);
1740 if (!test_bit(HCI_UP
, &hdev
->flags
)) {
1745 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
1750 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
)) {
1755 err
= hci_dev_do_reset(hdev
);
1762 int hci_dev_reset_stat(__u16 dev
)
1764 struct hci_dev
*hdev
;
1767 hdev
= hci_dev_get(dev
);
1771 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
1776 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
)) {
1781 memset(&hdev
->stat
, 0, sizeof(struct hci_dev_stats
));
1788 static void hci_update_scan_state(struct hci_dev
*hdev
, u8 scan
)
1790 bool conn_changed
, discov_changed
;
1792 BT_DBG("%s scan 0x%02x", hdev
->name
, scan
);
1794 if ((scan
& SCAN_PAGE
))
1795 conn_changed
= !hci_dev_test_and_set_flag(hdev
,
1798 conn_changed
= hci_dev_test_and_clear_flag(hdev
,
1801 if ((scan
& SCAN_INQUIRY
)) {
1802 discov_changed
= !hci_dev_test_and_set_flag(hdev
,
1805 hci_dev_clear_flag(hdev
, HCI_LIMITED_DISCOVERABLE
);
1806 discov_changed
= hci_dev_test_and_clear_flag(hdev
,
1810 if (!hci_dev_test_flag(hdev
, HCI_MGMT
))
1813 if (conn_changed
|| discov_changed
) {
1814 /* In case this was disabled through mgmt */
1815 hci_dev_set_flag(hdev
, HCI_BREDR_ENABLED
);
1817 if (hci_dev_test_flag(hdev
, HCI_LE_ENABLED
))
1818 mgmt_update_adv_data(hdev
);
1820 mgmt_new_settings(hdev
);
1824 int hci_dev_cmd(unsigned int cmd
, void __user
*arg
)
1826 struct hci_dev
*hdev
;
1827 struct hci_dev_req dr
;
1830 if (copy_from_user(&dr
, arg
, sizeof(dr
)))
1833 hdev
= hci_dev_get(dr
.dev_id
);
1837 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
1842 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
)) {
1847 if (hdev
->dev_type
!= HCI_BREDR
) {
1852 if (!hci_dev_test_flag(hdev
, HCI_BREDR_ENABLED
)) {
1859 err
= hci_req_sync(hdev
, hci_auth_req
, dr
.dev_opt
,
1864 if (!lmp_encrypt_capable(hdev
)) {
1869 if (!test_bit(HCI_AUTH
, &hdev
->flags
)) {
1870 /* Auth must be enabled first */
1871 err
= hci_req_sync(hdev
, hci_auth_req
, dr
.dev_opt
,
1877 err
= hci_req_sync(hdev
, hci_encrypt_req
, dr
.dev_opt
,
1882 err
= hci_req_sync(hdev
, hci_scan_req
, dr
.dev_opt
,
1885 /* Ensure that the connectable and discoverable states
1886 * get correctly modified as this was a non-mgmt change.
1889 hci_update_scan_state(hdev
, dr
.dev_opt
);
1893 err
= hci_req_sync(hdev
, hci_linkpol_req
, dr
.dev_opt
,
1897 case HCISETLINKMODE
:
1898 hdev
->link_mode
= ((__u16
) dr
.dev_opt
) &
1899 (HCI_LM_MASTER
| HCI_LM_ACCEPT
);
1903 hdev
->pkt_type
= (__u16
) dr
.dev_opt
;
1907 hdev
->acl_mtu
= *((__u16
*) &dr
.dev_opt
+ 1);
1908 hdev
->acl_pkts
= *((__u16
*) &dr
.dev_opt
+ 0);
1912 hdev
->sco_mtu
= *((__u16
*) &dr
.dev_opt
+ 1);
1913 hdev
->sco_pkts
= *((__u16
*) &dr
.dev_opt
+ 0);
1926 int hci_get_dev_list(void __user
*arg
)
1928 struct hci_dev
*hdev
;
1929 struct hci_dev_list_req
*dl
;
1930 struct hci_dev_req
*dr
;
1931 int n
= 0, size
, err
;
1934 if (get_user(dev_num
, (__u16 __user
*) arg
))
1937 if (!dev_num
|| dev_num
> (PAGE_SIZE
* 2) / sizeof(*dr
))
1940 size
= sizeof(*dl
) + dev_num
* sizeof(*dr
);
1942 dl
= kzalloc(size
, GFP_KERNEL
);
1948 read_lock(&hci_dev_list_lock
);
1949 list_for_each_entry(hdev
, &hci_dev_list
, list
) {
1950 unsigned long flags
= hdev
->flags
;
1952 /* When the auto-off is configured it means the transport
1953 * is running, but in that case still indicate that the
1954 * device is actually down.
1956 if (hci_dev_test_flag(hdev
, HCI_AUTO_OFF
))
1957 flags
&= ~BIT(HCI_UP
);
1959 (dr
+ n
)->dev_id
= hdev
->id
;
1960 (dr
+ n
)->dev_opt
= flags
;
1965 read_unlock(&hci_dev_list_lock
);
1968 size
= sizeof(*dl
) + n
* sizeof(*dr
);
1970 err
= copy_to_user(arg
, dl
, size
);
1973 return err
? -EFAULT
: 0;
1976 int hci_get_dev_info(void __user
*arg
)
1978 struct hci_dev
*hdev
;
1979 struct hci_dev_info di
;
1980 unsigned long flags
;
1983 if (copy_from_user(&di
, arg
, sizeof(di
)))
1986 hdev
= hci_dev_get(di
.dev_id
);
1990 /* When the auto-off is configured it means the transport
1991 * is running, but in that case still indicate that the
1992 * device is actually down.
1994 if (hci_dev_test_flag(hdev
, HCI_AUTO_OFF
))
1995 flags
= hdev
->flags
& ~BIT(HCI_UP
);
1997 flags
= hdev
->flags
;
1999 strcpy(di
.name
, hdev
->name
);
2000 di
.bdaddr
= hdev
->bdaddr
;
2001 di
.type
= (hdev
->bus
& 0x0f) | ((hdev
->dev_type
& 0x03) << 4);
2003 di
.pkt_type
= hdev
->pkt_type
;
2004 if (lmp_bredr_capable(hdev
)) {
2005 di
.acl_mtu
= hdev
->acl_mtu
;
2006 di
.acl_pkts
= hdev
->acl_pkts
;
2007 di
.sco_mtu
= hdev
->sco_mtu
;
2008 di
.sco_pkts
= hdev
->sco_pkts
;
2010 di
.acl_mtu
= hdev
->le_mtu
;
2011 di
.acl_pkts
= hdev
->le_pkts
;
2015 di
.link_policy
= hdev
->link_policy
;
2016 di
.link_mode
= hdev
->link_mode
;
2018 memcpy(&di
.stat
, &hdev
->stat
, sizeof(di
.stat
));
2019 memcpy(&di
.features
, &hdev
->features
, sizeof(di
.features
));
2021 if (copy_to_user(arg
, &di
, sizeof(di
)))
2029 /* ---- Interface to HCI drivers ---- */
2031 static int hci_rfkill_set_block(void *data
, bool blocked
)
2033 struct hci_dev
*hdev
= data
;
2035 BT_DBG("%p name %s blocked %d", hdev
, hdev
->name
, blocked
);
2037 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
))
2041 hci_dev_set_flag(hdev
, HCI_RFKILLED
);
2042 if (!hci_dev_test_flag(hdev
, HCI_SETUP
) &&
2043 !hci_dev_test_flag(hdev
, HCI_CONFIG
))
2044 hci_dev_do_close(hdev
);
2046 hci_dev_clear_flag(hdev
, HCI_RFKILLED
);
2052 static const struct rfkill_ops hci_rfkill_ops
= {
2053 .set_block
= hci_rfkill_set_block
,
2056 static void hci_power_on(struct work_struct
*work
)
2058 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, power_on
);
2061 BT_DBG("%s", hdev
->name
);
2063 err
= hci_dev_do_open(hdev
);
2066 mgmt_set_powered_failed(hdev
, err
);
2067 hci_dev_unlock(hdev
);
2071 /* During the HCI setup phase, a few error conditions are
2072 * ignored and they need to be checked now. If they are still
2073 * valid, it is important to turn the device back off.
2075 if (hci_dev_test_flag(hdev
, HCI_RFKILLED
) ||
2076 hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
) ||
2077 (hdev
->dev_type
== HCI_BREDR
&&
2078 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
) &&
2079 !bacmp(&hdev
->static_addr
, BDADDR_ANY
))) {
2080 hci_dev_clear_flag(hdev
, HCI_AUTO_OFF
);
2081 hci_dev_do_close(hdev
);
2082 } else if (hci_dev_test_flag(hdev
, HCI_AUTO_OFF
)) {
2083 queue_delayed_work(hdev
->req_workqueue
, &hdev
->power_off
,
2084 HCI_AUTO_OFF_TIMEOUT
);
2087 if (hci_dev_test_and_clear_flag(hdev
, HCI_SETUP
)) {
2088 /* For unconfigured devices, set the HCI_RAW flag
2089 * so that userspace can easily identify them.
2091 if (hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
))
2092 set_bit(HCI_RAW
, &hdev
->flags
);
2094 /* For fully configured devices, this will send
2095 * the Index Added event. For unconfigured devices,
2096 * it will send Unconfigued Index Added event.
2098 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2099 * and no event will be send.
2101 mgmt_index_added(hdev
);
2102 } else if (hci_dev_test_and_clear_flag(hdev
, HCI_CONFIG
)) {
2103 /* When the controller is now configured, then it
2104 * is important to clear the HCI_RAW flag.
2106 if (!hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
))
2107 clear_bit(HCI_RAW
, &hdev
->flags
);
2109 /* Powering on the controller with HCI_CONFIG set only
2110 * happens with the transition from unconfigured to
2111 * configured. This will send the Index Added event.
2113 mgmt_index_added(hdev
);
2117 static void hci_power_off(struct work_struct
*work
)
2119 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
2122 BT_DBG("%s", hdev
->name
);
2124 hci_dev_do_close(hdev
);
2127 static void hci_error_reset(struct work_struct
*work
)
2129 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, error_reset
);
2131 BT_DBG("%s", hdev
->name
);
2134 hdev
->hw_error(hdev
, hdev
->hw_error_code
);
2136 BT_ERR("%s hardware error 0x%2.2x", hdev
->name
,
2137 hdev
->hw_error_code
);
2139 if (hci_dev_do_close(hdev
))
2142 hci_dev_do_open(hdev
);
2145 static void hci_discov_off(struct work_struct
*work
)
2147 struct hci_dev
*hdev
;
2149 hdev
= container_of(work
, struct hci_dev
, discov_off
.work
);
2151 BT_DBG("%s", hdev
->name
);
2153 mgmt_discoverable_timeout(hdev
);
2156 static void hci_adv_timeout_expire(struct work_struct
*work
)
2158 struct hci_dev
*hdev
;
2160 hdev
= container_of(work
, struct hci_dev
, adv_instance_expire
.work
);
2162 BT_DBG("%s", hdev
->name
);
2164 mgmt_adv_timeout_expired(hdev
);
2167 void hci_uuids_clear(struct hci_dev
*hdev
)
2169 struct bt_uuid
*uuid
, *tmp
;
2171 list_for_each_entry_safe(uuid
, tmp
, &hdev
->uuids
, list
) {
2172 list_del(&uuid
->list
);
2177 void hci_link_keys_clear(struct hci_dev
*hdev
)
2179 struct link_key
*key
;
2181 list_for_each_entry_rcu(key
, &hdev
->link_keys
, list
) {
2182 list_del_rcu(&key
->list
);
2183 kfree_rcu(key
, rcu
);
2187 void hci_smp_ltks_clear(struct hci_dev
*hdev
)
2191 list_for_each_entry_rcu(k
, &hdev
->long_term_keys
, list
) {
2192 list_del_rcu(&k
->list
);
2197 void hci_smp_irks_clear(struct hci_dev
*hdev
)
2201 list_for_each_entry_rcu(k
, &hdev
->identity_resolving_keys
, list
) {
2202 list_del_rcu(&k
->list
);
2207 struct link_key
*hci_find_link_key(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
2212 list_for_each_entry_rcu(k
, &hdev
->link_keys
, list
) {
2213 if (bacmp(bdaddr
, &k
->bdaddr
) == 0) {
2223 static bool hci_persistent_key(struct hci_dev
*hdev
, struct hci_conn
*conn
,
2224 u8 key_type
, u8 old_key_type
)
2227 if (key_type
< 0x03)
2230 /* Debug keys are insecure so don't store them persistently */
2231 if (key_type
== HCI_LK_DEBUG_COMBINATION
)
2234 /* Changed combination key and there's no previous one */
2235 if (key_type
== HCI_LK_CHANGED_COMBINATION
&& old_key_type
== 0xff)
2238 /* Security mode 3 case */
2242 /* BR/EDR key derived using SC from an LE link */
2243 if (conn
->type
== LE_LINK
)
2246 /* Neither local nor remote side had no-bonding as requirement */
2247 if (conn
->auth_type
> 0x01 && conn
->remote_auth
> 0x01)
2250 /* Local side had dedicated bonding as requirement */
2251 if (conn
->auth_type
== 0x02 || conn
->auth_type
== 0x03)
2254 /* Remote side had dedicated bonding as requirement */
2255 if (conn
->remote_auth
== 0x02 || conn
->remote_auth
== 0x03)
2258 /* If none of the above criteria match, then don't store the key
2263 static u8
ltk_role(u8 type
)
2265 if (type
== SMP_LTK
)
2266 return HCI_ROLE_MASTER
;
2268 return HCI_ROLE_SLAVE
;
2271 struct smp_ltk
*hci_find_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
2272 u8 addr_type
, u8 role
)
2277 list_for_each_entry_rcu(k
, &hdev
->long_term_keys
, list
) {
2278 if (addr_type
!= k
->bdaddr_type
|| bacmp(bdaddr
, &k
->bdaddr
))
2281 if (smp_ltk_is_sc(k
) || ltk_role(k
->type
) == role
) {
2291 struct smp_irk
*hci_find_irk_by_rpa(struct hci_dev
*hdev
, bdaddr_t
*rpa
)
2293 struct smp_irk
*irk
;
2296 list_for_each_entry_rcu(irk
, &hdev
->identity_resolving_keys
, list
) {
2297 if (!bacmp(&irk
->rpa
, rpa
)) {
2303 list_for_each_entry_rcu(irk
, &hdev
->identity_resolving_keys
, list
) {
2304 if (smp_irk_matches(hdev
, irk
->val
, rpa
)) {
2305 bacpy(&irk
->rpa
, rpa
);
2315 struct smp_irk
*hci_find_irk_by_addr(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
2318 struct smp_irk
*irk
;
2320 /* Identity Address must be public or static random */
2321 if (addr_type
== ADDR_LE_DEV_RANDOM
&& (bdaddr
->b
[5] & 0xc0) != 0xc0)
2325 list_for_each_entry_rcu(irk
, &hdev
->identity_resolving_keys
, list
) {
2326 if (addr_type
== irk
->addr_type
&&
2327 bacmp(bdaddr
, &irk
->bdaddr
) == 0) {
2337 struct link_key
*hci_add_link_key(struct hci_dev
*hdev
, struct hci_conn
*conn
,
2338 bdaddr_t
*bdaddr
, u8
*val
, u8 type
,
2339 u8 pin_len
, bool *persistent
)
2341 struct link_key
*key
, *old_key
;
2344 old_key
= hci_find_link_key(hdev
, bdaddr
);
2346 old_key_type
= old_key
->type
;
2349 old_key_type
= conn
? conn
->key_type
: 0xff;
2350 key
= kzalloc(sizeof(*key
), GFP_KERNEL
);
2353 list_add_rcu(&key
->list
, &hdev
->link_keys
);
2356 BT_DBG("%s key for %pMR type %u", hdev
->name
, bdaddr
, type
);
2358 /* Some buggy controller combinations generate a changed
2359 * combination key for legacy pairing even when there's no
2361 if (type
== HCI_LK_CHANGED_COMBINATION
&&
2362 (!conn
|| conn
->remote_auth
== 0xff) && old_key_type
== 0xff) {
2363 type
= HCI_LK_COMBINATION
;
2365 conn
->key_type
= type
;
2368 bacpy(&key
->bdaddr
, bdaddr
);
2369 memcpy(key
->val
, val
, HCI_LINK_KEY_SIZE
);
2370 key
->pin_len
= pin_len
;
2372 if (type
== HCI_LK_CHANGED_COMBINATION
)
2373 key
->type
= old_key_type
;
2378 *persistent
= hci_persistent_key(hdev
, conn
, type
,
2384 struct smp_ltk
*hci_add_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
2385 u8 addr_type
, u8 type
, u8 authenticated
,
2386 u8 tk
[16], u8 enc_size
, __le16 ediv
, __le64 rand
)
2388 struct smp_ltk
*key
, *old_key
;
2389 u8 role
= ltk_role(type
);
2391 old_key
= hci_find_ltk(hdev
, bdaddr
, addr_type
, role
);
2395 key
= kzalloc(sizeof(*key
), GFP_KERNEL
);
2398 list_add_rcu(&key
->list
, &hdev
->long_term_keys
);
2401 bacpy(&key
->bdaddr
, bdaddr
);
2402 key
->bdaddr_type
= addr_type
;
2403 memcpy(key
->val
, tk
, sizeof(key
->val
));
2404 key
->authenticated
= authenticated
;
2407 key
->enc_size
= enc_size
;
2413 struct smp_irk
*hci_add_irk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
2414 u8 addr_type
, u8 val
[16], bdaddr_t
*rpa
)
2416 struct smp_irk
*irk
;
2418 irk
= hci_find_irk_by_addr(hdev
, bdaddr
, addr_type
);
2420 irk
= kzalloc(sizeof(*irk
), GFP_KERNEL
);
2424 bacpy(&irk
->bdaddr
, bdaddr
);
2425 irk
->addr_type
= addr_type
;
2427 list_add_rcu(&irk
->list
, &hdev
->identity_resolving_keys
);
2430 memcpy(irk
->val
, val
, 16);
2431 bacpy(&irk
->rpa
, rpa
);
2436 int hci_remove_link_key(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
2438 struct link_key
*key
;
2440 key
= hci_find_link_key(hdev
, bdaddr
);
2444 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
2446 list_del_rcu(&key
->list
);
2447 kfree_rcu(key
, rcu
);
2452 int hci_remove_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 bdaddr_type
)
2457 list_for_each_entry_rcu(k
, &hdev
->long_term_keys
, list
) {
2458 if (bacmp(bdaddr
, &k
->bdaddr
) || k
->bdaddr_type
!= bdaddr_type
)
2461 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
2463 list_del_rcu(&k
->list
);
2468 return removed
? 0 : -ENOENT
;
2471 void hci_remove_irk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 addr_type
)
2475 list_for_each_entry_rcu(k
, &hdev
->identity_resolving_keys
, list
) {
2476 if (bacmp(bdaddr
, &k
->bdaddr
) || k
->addr_type
!= addr_type
)
2479 BT_DBG("%s removing %pMR", hdev
->name
, bdaddr
);
2481 list_del_rcu(&k
->list
);
2486 bool hci_bdaddr_is_paired(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 type
)
2489 struct smp_irk
*irk
;
2492 if (type
== BDADDR_BREDR
) {
2493 if (hci_find_link_key(hdev
, bdaddr
))
2498 /* Convert to HCI addr type which struct smp_ltk uses */
2499 if (type
== BDADDR_LE_PUBLIC
)
2500 addr_type
= ADDR_LE_DEV_PUBLIC
;
2502 addr_type
= ADDR_LE_DEV_RANDOM
;
2504 irk
= hci_get_irk(hdev
, bdaddr
, addr_type
);
2506 bdaddr
= &irk
->bdaddr
;
2507 addr_type
= irk
->addr_type
;
2511 list_for_each_entry_rcu(k
, &hdev
->long_term_keys
, list
) {
2512 if (k
->bdaddr_type
== addr_type
&& !bacmp(bdaddr
, &k
->bdaddr
)) {
2522 /* HCI command timer function */
2523 static void hci_cmd_timeout(struct work_struct
*work
)
2525 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
2528 if (hdev
->sent_cmd
) {
2529 struct hci_command_hdr
*sent
= (void *) hdev
->sent_cmd
->data
;
2530 u16 opcode
= __le16_to_cpu(sent
->opcode
);
2532 BT_ERR("%s command 0x%4.4x tx timeout", hdev
->name
, opcode
);
2534 BT_ERR("%s command tx timeout", hdev
->name
);
2537 atomic_set(&hdev
->cmd_cnt
, 1);
2538 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
2541 struct oob_data
*hci_find_remote_oob_data(struct hci_dev
*hdev
,
2542 bdaddr_t
*bdaddr
, u8 bdaddr_type
)
2544 struct oob_data
*data
;
2546 list_for_each_entry(data
, &hdev
->remote_oob_data
, list
) {
2547 if (bacmp(bdaddr
, &data
->bdaddr
) != 0)
2549 if (data
->bdaddr_type
!= bdaddr_type
)
2557 int hci_remove_remote_oob_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
2560 struct oob_data
*data
;
2562 data
= hci_find_remote_oob_data(hdev
, bdaddr
, bdaddr_type
);
2566 BT_DBG("%s removing %pMR (%u)", hdev
->name
, bdaddr
, bdaddr_type
);
2568 list_del(&data
->list
);
2574 void hci_remote_oob_data_clear(struct hci_dev
*hdev
)
2576 struct oob_data
*data
, *n
;
2578 list_for_each_entry_safe(data
, n
, &hdev
->remote_oob_data
, list
) {
2579 list_del(&data
->list
);
2584 int hci_add_remote_oob_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
2585 u8 bdaddr_type
, u8
*hash192
, u8
*rand192
,
2586 u8
*hash256
, u8
*rand256
)
2588 struct oob_data
*data
;
2590 data
= hci_find_remote_oob_data(hdev
, bdaddr
, bdaddr_type
);
2592 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
2596 bacpy(&data
->bdaddr
, bdaddr
);
2597 data
->bdaddr_type
= bdaddr_type
;
2598 list_add(&data
->list
, &hdev
->remote_oob_data
);
2601 if (hash192
&& rand192
) {
2602 memcpy(data
->hash192
, hash192
, sizeof(data
->hash192
));
2603 memcpy(data
->rand192
, rand192
, sizeof(data
->rand192
));
2604 if (hash256
&& rand256
)
2605 data
->present
= 0x03;
2607 memset(data
->hash192
, 0, sizeof(data
->hash192
));
2608 memset(data
->rand192
, 0, sizeof(data
->rand192
));
2609 if (hash256
&& rand256
)
2610 data
->present
= 0x02;
2612 data
->present
= 0x00;
2615 if (hash256
&& rand256
) {
2616 memcpy(data
->hash256
, hash256
, sizeof(data
->hash256
));
2617 memcpy(data
->rand256
, rand256
, sizeof(data
->rand256
));
2619 memset(data
->hash256
, 0, sizeof(data
->hash256
));
2620 memset(data
->rand256
, 0, sizeof(data
->rand256
));
2621 if (hash192
&& rand192
)
2622 data
->present
= 0x01;
2625 BT_DBG("%s for %pMR", hdev
->name
, bdaddr
);
2630 /* This function requires the caller holds hdev->lock */
2631 struct adv_info
*hci_find_adv_instance(struct hci_dev
*hdev
, u8 instance
)
2633 struct adv_info
*adv_instance
;
2635 list_for_each_entry(adv_instance
, &hdev
->adv_instances
, list
) {
2636 if (adv_instance
->instance
== instance
)
2637 return adv_instance
;
2643 /* This function requires the caller holds hdev->lock */
2644 struct adv_info
*hci_get_next_instance(struct hci_dev
*hdev
, u8 instance
) {
2645 struct adv_info
*cur_instance
;
2647 cur_instance
= hci_find_adv_instance(hdev
, instance
);
2651 if (cur_instance
== list_last_entry(&hdev
->adv_instances
,
2652 struct adv_info
, list
))
2653 return list_first_entry(&hdev
->adv_instances
,
2654 struct adv_info
, list
);
2656 return list_next_entry(cur_instance
, list
);
2659 /* This function requires the caller holds hdev->lock */
2660 int hci_remove_adv_instance(struct hci_dev
*hdev
, u8 instance
)
2662 struct adv_info
*adv_instance
;
2664 adv_instance
= hci_find_adv_instance(hdev
, instance
);
2668 BT_DBG("%s removing %dMR", hdev
->name
, instance
);
2670 if (hdev
->cur_adv_instance
== instance
&& hdev
->adv_instance_timeout
) {
2671 cancel_delayed_work(&hdev
->adv_instance_expire
);
2672 hdev
->adv_instance_timeout
= 0;
2675 list_del(&adv_instance
->list
);
2676 kfree(adv_instance
);
2678 hdev
->adv_instance_cnt
--;
2683 /* This function requires the caller holds hdev->lock */
2684 void hci_adv_instances_clear(struct hci_dev
*hdev
)
2686 struct adv_info
*adv_instance
, *n
;
2688 if (hdev
->adv_instance_timeout
) {
2689 cancel_delayed_work(&hdev
->adv_instance_expire
);
2690 hdev
->adv_instance_timeout
= 0;
2693 list_for_each_entry_safe(adv_instance
, n
, &hdev
->adv_instances
, list
) {
2694 list_del(&adv_instance
->list
);
2695 kfree(adv_instance
);
2698 hdev
->adv_instance_cnt
= 0;
2701 /* This function requires the caller holds hdev->lock */
2702 int hci_add_adv_instance(struct hci_dev
*hdev
, u8 instance
, u32 flags
,
2703 u16 adv_data_len
, u8
*adv_data
,
2704 u16 scan_rsp_len
, u8
*scan_rsp_data
,
2705 u16 timeout
, u16 duration
)
2707 struct adv_info
*adv_instance
;
2709 adv_instance
= hci_find_adv_instance(hdev
, instance
);
2711 memset(adv_instance
->adv_data
, 0,
2712 sizeof(adv_instance
->adv_data
));
2713 memset(adv_instance
->scan_rsp_data
, 0,
2714 sizeof(adv_instance
->scan_rsp_data
));
2716 if (hdev
->adv_instance_cnt
>= HCI_MAX_ADV_INSTANCES
||
2717 instance
< 1 || instance
> HCI_MAX_ADV_INSTANCES
)
2720 adv_instance
= kzalloc(sizeof(*adv_instance
), GFP_KERNEL
);
2724 adv_instance
->pending
= true;
2725 adv_instance
->instance
= instance
;
2726 list_add(&adv_instance
->list
, &hdev
->adv_instances
);
2727 hdev
->adv_instance_cnt
++;
2730 adv_instance
->flags
= flags
;
2731 adv_instance
->adv_data_len
= adv_data_len
;
2732 adv_instance
->scan_rsp_len
= scan_rsp_len
;
2735 memcpy(adv_instance
->adv_data
, adv_data
, adv_data_len
);
2738 memcpy(adv_instance
->scan_rsp_data
,
2739 scan_rsp_data
, scan_rsp_len
);
2741 adv_instance
->timeout
= timeout
;
2742 adv_instance
->remaining_time
= timeout
;
2745 adv_instance
->duration
= HCI_DEFAULT_ADV_DURATION
;
2747 adv_instance
->duration
= duration
;
2749 BT_DBG("%s for %dMR", hdev
->name
, instance
);
2754 struct bdaddr_list
*hci_bdaddr_list_lookup(struct list_head
*bdaddr_list
,
2755 bdaddr_t
*bdaddr
, u8 type
)
2757 struct bdaddr_list
*b
;
2759 list_for_each_entry(b
, bdaddr_list
, list
) {
2760 if (!bacmp(&b
->bdaddr
, bdaddr
) && b
->bdaddr_type
== type
)
2767 void hci_bdaddr_list_clear(struct list_head
*bdaddr_list
)
2769 struct list_head
*p
, *n
;
2771 list_for_each_safe(p
, n
, bdaddr_list
) {
2772 struct bdaddr_list
*b
= list_entry(p
, struct bdaddr_list
, list
);
2779 int hci_bdaddr_list_add(struct list_head
*list
, bdaddr_t
*bdaddr
, u8 type
)
2781 struct bdaddr_list
*entry
;
2783 if (!bacmp(bdaddr
, BDADDR_ANY
))
2786 if (hci_bdaddr_list_lookup(list
, bdaddr
, type
))
2789 entry
= kzalloc(sizeof(*entry
), GFP_KERNEL
);
2793 bacpy(&entry
->bdaddr
, bdaddr
);
2794 entry
->bdaddr_type
= type
;
2796 list_add(&entry
->list
, list
);
2801 int hci_bdaddr_list_del(struct list_head
*list
, bdaddr_t
*bdaddr
, u8 type
)
2803 struct bdaddr_list
*entry
;
2805 if (!bacmp(bdaddr
, BDADDR_ANY
)) {
2806 hci_bdaddr_list_clear(list
);
2810 entry
= hci_bdaddr_list_lookup(list
, bdaddr
, type
);
2814 list_del(&entry
->list
);
2820 /* This function requires the caller holds hdev->lock */
2821 struct hci_conn_params
*hci_conn_params_lookup(struct hci_dev
*hdev
,
2822 bdaddr_t
*addr
, u8 addr_type
)
2824 struct hci_conn_params
*params
;
2826 list_for_each_entry(params
, &hdev
->le_conn_params
, list
) {
2827 if (bacmp(¶ms
->addr
, addr
) == 0 &&
2828 params
->addr_type
== addr_type
) {
2836 /* This function requires the caller holds hdev->lock */
2837 struct hci_conn_params
*hci_pend_le_action_lookup(struct list_head
*list
,
2838 bdaddr_t
*addr
, u8 addr_type
)
2840 struct hci_conn_params
*param
;
2842 list_for_each_entry(param
, list
, action
) {
2843 if (bacmp(¶m
->addr
, addr
) == 0 &&
2844 param
->addr_type
== addr_type
)
2851 /* This function requires the caller holds hdev->lock */
2852 struct hci_conn_params
*hci_explicit_connect_lookup(struct hci_dev
*hdev
,
2856 struct hci_conn_params
*param
;
2858 list_for_each_entry(param
, &hdev
->pend_le_conns
, action
) {
2859 if (bacmp(¶m
->addr
, addr
) == 0 &&
2860 param
->addr_type
== addr_type
&&
2861 param
->explicit_connect
)
2865 list_for_each_entry(param
, &hdev
->pend_le_reports
, action
) {
2866 if (bacmp(¶m
->addr
, addr
) == 0 &&
2867 param
->addr_type
== addr_type
&&
2868 param
->explicit_connect
)
2875 /* This function requires the caller holds hdev->lock */
2876 struct hci_conn_params
*hci_conn_params_add(struct hci_dev
*hdev
,
2877 bdaddr_t
*addr
, u8 addr_type
)
2879 struct hci_conn_params
*params
;
2881 params
= hci_conn_params_lookup(hdev
, addr
, addr_type
);
2885 params
= kzalloc(sizeof(*params
), GFP_KERNEL
);
2887 BT_ERR("Out of memory");
2891 bacpy(¶ms
->addr
, addr
);
2892 params
->addr_type
= addr_type
;
2894 list_add(¶ms
->list
, &hdev
->le_conn_params
);
2895 INIT_LIST_HEAD(¶ms
->action
);
2897 params
->conn_min_interval
= hdev
->le_conn_min_interval
;
2898 params
->conn_max_interval
= hdev
->le_conn_max_interval
;
2899 params
->conn_latency
= hdev
->le_conn_latency
;
2900 params
->supervision_timeout
= hdev
->le_supv_timeout
;
2901 params
->auto_connect
= HCI_AUTO_CONN_DISABLED
;
2903 BT_DBG("addr %pMR (type %u)", addr
, addr_type
);
2908 static void hci_conn_params_free(struct hci_conn_params
*params
)
2911 hci_conn_drop(params
->conn
);
2912 hci_conn_put(params
->conn
);
2915 list_del(¶ms
->action
);
2916 list_del(¶ms
->list
);
2920 /* This function requires the caller holds hdev->lock */
2921 void hci_conn_params_del(struct hci_dev
*hdev
, bdaddr_t
*addr
, u8 addr_type
)
2923 struct hci_conn_params
*params
;
2925 params
= hci_conn_params_lookup(hdev
, addr
, addr_type
);
2929 hci_conn_params_free(params
);
2931 hci_update_background_scan(hdev
);
2933 BT_DBG("addr %pMR (type %u)", addr
, addr_type
);
2936 /* This function requires the caller holds hdev->lock */
2937 void hci_conn_params_clear_disabled(struct hci_dev
*hdev
)
2939 struct hci_conn_params
*params
, *tmp
;
2941 list_for_each_entry_safe(params
, tmp
, &hdev
->le_conn_params
, list
) {
2942 if (params
->auto_connect
!= HCI_AUTO_CONN_DISABLED
)
2945 /* If trying to estabilish one time connection to disabled
2946 * device, leave the params, but mark them as just once.
2948 if (params
->explicit_connect
) {
2949 params
->auto_connect
= HCI_AUTO_CONN_EXPLICIT
;
2953 list_del(¶ms
->list
);
2957 BT_DBG("All LE disabled connection parameters were removed");
2960 /* This function requires the caller holds hdev->lock */
2961 void hci_conn_params_clear_all(struct hci_dev
*hdev
)
2963 struct hci_conn_params
*params
, *tmp
;
2965 list_for_each_entry_safe(params
, tmp
, &hdev
->le_conn_params
, list
)
2966 hci_conn_params_free(params
);
2968 hci_update_background_scan(hdev
);
2970 BT_DBG("All LE connection parameters were removed");
2973 static void inquiry_complete(struct hci_dev
*hdev
, u8 status
, u16 opcode
)
2976 BT_ERR("Failed to start inquiry: status %d", status
);
2979 hci_discovery_set_state(hdev
, DISCOVERY_STOPPED
);
2980 hci_dev_unlock(hdev
);
2985 static void le_scan_disable_work_complete(struct hci_dev
*hdev
, u8 status
,
2988 /* General inquiry access code (GIAC) */
2989 u8 lap
[3] = { 0x33, 0x8b, 0x9e };
2990 struct hci_cp_inquiry cp
;
2994 BT_ERR("Failed to disable LE scanning: status %d", status
);
2998 hdev
->discovery
.scan_start
= 0;
3000 switch (hdev
->discovery
.type
) {
3001 case DISCOV_TYPE_LE
:
3003 hci_discovery_set_state(hdev
, DISCOVERY_STOPPED
);
3004 hci_dev_unlock(hdev
);
3007 case DISCOV_TYPE_INTERLEAVED
:
3010 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY
,
3012 /* If we were running LE only scan, change discovery
3013 * state. If we were running both LE and BR/EDR inquiry
3014 * simultaneously, and BR/EDR inquiry is already
3015 * finished, stop discovery, otherwise BR/EDR inquiry
3016 * will stop discovery when finished. If we will resolve
3017 * remote device name, do not change discovery state.
3019 if (!test_bit(HCI_INQUIRY
, &hdev
->flags
) &&
3020 hdev
->discovery
.state
!= DISCOVERY_RESOLVING
)
3021 hci_discovery_set_state(hdev
,
3024 struct hci_request req
;
3026 hci_inquiry_cache_flush(hdev
);
3028 hci_req_init(&req
, hdev
);
3030 memset(&cp
, 0, sizeof(cp
));
3031 memcpy(&cp
.lap
, lap
, sizeof(cp
.lap
));
3032 cp
.length
= DISCOV_INTERLEAVED_INQUIRY_LEN
;
3033 hci_req_add(&req
, HCI_OP_INQUIRY
, sizeof(cp
), &cp
);
3035 err
= hci_req_run(&req
, inquiry_complete
);
3037 BT_ERR("Inquiry request failed: err %d", err
);
3038 hci_discovery_set_state(hdev
,
3043 hci_dev_unlock(hdev
);
3048 static void le_scan_disable_work(struct work_struct
*work
)
3050 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
3051 le_scan_disable
.work
);
3052 struct hci_request req
;
3055 BT_DBG("%s", hdev
->name
);
3057 cancel_delayed_work_sync(&hdev
->le_scan_restart
);
3059 hci_req_init(&req
, hdev
);
3061 hci_req_add_le_scan_disable(&req
);
3063 err
= hci_req_run(&req
, le_scan_disable_work_complete
);
3065 BT_ERR("Disable LE scanning request failed: err %d", err
);
3068 static void le_scan_restart_work_complete(struct hci_dev
*hdev
, u8 status
,
3071 unsigned long timeout
, duration
, scan_start
, now
;
3073 BT_DBG("%s", hdev
->name
);
3076 BT_ERR("Failed to restart LE scan: status %d", status
);
3080 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER
, &hdev
->quirks
) ||
3081 !hdev
->discovery
.scan_start
)
3084 /* When the scan was started, hdev->le_scan_disable has been queued
3085 * after duration from scan_start. During scan restart this job
3086 * has been canceled, and we need to queue it again after proper
3087 * timeout, to make sure that scan does not run indefinitely.
3089 duration
= hdev
->discovery
.scan_duration
;
3090 scan_start
= hdev
->discovery
.scan_start
;
3092 if (now
- scan_start
<= duration
) {
3095 if (now
>= scan_start
)
3096 elapsed
= now
- scan_start
;
3098 elapsed
= ULONG_MAX
- scan_start
+ now
;
3100 timeout
= duration
- elapsed
;
3104 queue_delayed_work(hdev
->workqueue
,
3105 &hdev
->le_scan_disable
, timeout
);
3108 static void le_scan_restart_work(struct work_struct
*work
)
3110 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
3111 le_scan_restart
.work
);
3112 struct hci_request req
;
3113 struct hci_cp_le_set_scan_enable cp
;
3116 BT_DBG("%s", hdev
->name
);
3118 /* If controller is not scanning we are done. */
3119 if (!hci_dev_test_flag(hdev
, HCI_LE_SCAN
))
3122 hci_req_init(&req
, hdev
);
3124 hci_req_add_le_scan_disable(&req
);
3126 memset(&cp
, 0, sizeof(cp
));
3127 cp
.enable
= LE_SCAN_ENABLE
;
3128 cp
.filter_dup
= LE_SCAN_FILTER_DUP_ENABLE
;
3129 hci_req_add(&req
, HCI_OP_LE_SET_SCAN_ENABLE
, sizeof(cp
), &cp
);
3131 err
= hci_req_run(&req
, le_scan_restart_work_complete
);
3133 BT_ERR("Restart LE scan request failed: err %d", err
);
3136 /* Copy the Identity Address of the controller.
3138 * If the controller has a public BD_ADDR, then by default use that one.
3139 * If this is a LE only controller without a public address, default to
3140 * the static random address.
3142 * For debugging purposes it is possible to force controllers with a
3143 * public address to use the static random address instead.
3145 * In case BR/EDR has been disabled on a dual-mode controller and
3146 * userspace has configured a static address, then that address
3147 * becomes the identity address instead of the public BR/EDR address.
3149 void hci_copy_identity_address(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
3152 if (hci_dev_test_flag(hdev
, HCI_FORCE_STATIC_ADDR
) ||
3153 !bacmp(&hdev
->bdaddr
, BDADDR_ANY
) ||
3154 (!hci_dev_test_flag(hdev
, HCI_BREDR_ENABLED
) &&
3155 bacmp(&hdev
->static_addr
, BDADDR_ANY
))) {
3156 bacpy(bdaddr
, &hdev
->static_addr
);
3157 *bdaddr_type
= ADDR_LE_DEV_RANDOM
;
3159 bacpy(bdaddr
, &hdev
->bdaddr
);
3160 *bdaddr_type
= ADDR_LE_DEV_PUBLIC
;
3164 /* Alloc HCI device */
3165 struct hci_dev
*hci_alloc_dev(void)
3167 struct hci_dev
*hdev
;
3169 hdev
= kzalloc(sizeof(*hdev
), GFP_KERNEL
);
3173 hdev
->pkt_type
= (HCI_DM1
| HCI_DH1
| HCI_HV1
);
3174 hdev
->esco_type
= (ESCO_HV1
);
3175 hdev
->link_mode
= (HCI_LM_ACCEPT
);
3176 hdev
->num_iac
= 0x01; /* One IAC support is mandatory */
3177 hdev
->io_capability
= 0x03; /* No Input No Output */
3178 hdev
->manufacturer
= 0xffff; /* Default to internal use */
3179 hdev
->inq_tx_power
= HCI_TX_POWER_INVALID
;
3180 hdev
->adv_tx_power
= HCI_TX_POWER_INVALID
;
3181 hdev
->adv_instance_cnt
= 0;
3182 hdev
->cur_adv_instance
= 0x00;
3183 hdev
->adv_instance_timeout
= 0;
3185 hdev
->sniff_max_interval
= 800;
3186 hdev
->sniff_min_interval
= 80;
3188 hdev
->le_adv_channel_map
= 0x07;
3189 hdev
->le_adv_min_interval
= 0x0800;
3190 hdev
->le_adv_max_interval
= 0x0800;
3191 hdev
->le_scan_interval
= 0x0060;
3192 hdev
->le_scan_window
= 0x0030;
3193 hdev
->le_conn_min_interval
= 0x0028;
3194 hdev
->le_conn_max_interval
= 0x0038;
3195 hdev
->le_conn_latency
= 0x0000;
3196 hdev
->le_supv_timeout
= 0x002a;
3197 hdev
->le_def_tx_len
= 0x001b;
3198 hdev
->le_def_tx_time
= 0x0148;
3199 hdev
->le_max_tx_len
= 0x001b;
3200 hdev
->le_max_tx_time
= 0x0148;
3201 hdev
->le_max_rx_len
= 0x001b;
3202 hdev
->le_max_rx_time
= 0x0148;
3204 hdev
->rpa_timeout
= HCI_DEFAULT_RPA_TIMEOUT
;
3205 hdev
->discov_interleaved_timeout
= DISCOV_INTERLEAVED_TIMEOUT
;
3206 hdev
->conn_info_min_age
= DEFAULT_CONN_INFO_MIN_AGE
;
3207 hdev
->conn_info_max_age
= DEFAULT_CONN_INFO_MAX_AGE
;
3209 mutex_init(&hdev
->lock
);
3210 mutex_init(&hdev
->req_lock
);
3212 INIT_LIST_HEAD(&hdev
->mgmt_pending
);
3213 INIT_LIST_HEAD(&hdev
->blacklist
);
3214 INIT_LIST_HEAD(&hdev
->whitelist
);
3215 INIT_LIST_HEAD(&hdev
->uuids
);
3216 INIT_LIST_HEAD(&hdev
->link_keys
);
3217 INIT_LIST_HEAD(&hdev
->long_term_keys
);
3218 INIT_LIST_HEAD(&hdev
->identity_resolving_keys
);
3219 INIT_LIST_HEAD(&hdev
->remote_oob_data
);
3220 INIT_LIST_HEAD(&hdev
->le_white_list
);
3221 INIT_LIST_HEAD(&hdev
->le_conn_params
);
3222 INIT_LIST_HEAD(&hdev
->pend_le_conns
);
3223 INIT_LIST_HEAD(&hdev
->pend_le_reports
);
3224 INIT_LIST_HEAD(&hdev
->conn_hash
.list
);
3225 INIT_LIST_HEAD(&hdev
->adv_instances
);
3227 INIT_WORK(&hdev
->rx_work
, hci_rx_work
);
3228 INIT_WORK(&hdev
->cmd_work
, hci_cmd_work
);
3229 INIT_WORK(&hdev
->tx_work
, hci_tx_work
);
3230 INIT_WORK(&hdev
->power_on
, hci_power_on
);
3231 INIT_WORK(&hdev
->error_reset
, hci_error_reset
);
3233 INIT_DELAYED_WORK(&hdev
->power_off
, hci_power_off
);
3234 INIT_DELAYED_WORK(&hdev
->discov_off
, hci_discov_off
);
3235 INIT_DELAYED_WORK(&hdev
->le_scan_disable
, le_scan_disable_work
);
3236 INIT_DELAYED_WORK(&hdev
->le_scan_restart
, le_scan_restart_work
);
3237 INIT_DELAYED_WORK(&hdev
->adv_instance_expire
, hci_adv_timeout_expire
);
3239 skb_queue_head_init(&hdev
->rx_q
);
3240 skb_queue_head_init(&hdev
->cmd_q
);
3241 skb_queue_head_init(&hdev
->raw_q
);
3243 init_waitqueue_head(&hdev
->req_wait_q
);
3245 INIT_DELAYED_WORK(&hdev
->cmd_timer
, hci_cmd_timeout
);
3247 hci_init_sysfs(hdev
);
3248 discovery_init(hdev
);
3252 EXPORT_SYMBOL(hci_alloc_dev
);
3254 /* Free HCI device */
3255 void hci_free_dev(struct hci_dev
*hdev
)
3257 /* will free via device release */
3258 put_device(&hdev
->dev
);
3260 EXPORT_SYMBOL(hci_free_dev
);
3262 /* Register HCI device */
3263 int hci_register_dev(struct hci_dev
*hdev
)
3267 if (!hdev
->open
|| !hdev
->close
|| !hdev
->send
)
3270 /* Do not allow HCI_AMP devices to register at index 0,
3271 * so the index can be used as the AMP controller ID.
3273 switch (hdev
->dev_type
) {
3275 id
= ida_simple_get(&hci_index_ida
, 0, 0, GFP_KERNEL
);
3278 id
= ida_simple_get(&hci_index_ida
, 1, 0, GFP_KERNEL
);
3287 sprintf(hdev
->name
, "hci%d", id
);
3290 BT_DBG("%p name %s bus %d", hdev
, hdev
->name
, hdev
->bus
);
3292 hdev
->workqueue
= alloc_workqueue("%s", WQ_HIGHPRI
| WQ_UNBOUND
|
3293 WQ_MEM_RECLAIM
, 1, hdev
->name
);
3294 if (!hdev
->workqueue
) {
3299 hdev
->req_workqueue
= alloc_workqueue("%s", WQ_HIGHPRI
| WQ_UNBOUND
|
3300 WQ_MEM_RECLAIM
, 1, hdev
->name
);
3301 if (!hdev
->req_workqueue
) {
3302 destroy_workqueue(hdev
->workqueue
);
3307 if (!IS_ERR_OR_NULL(bt_debugfs
))
3308 hdev
->debugfs
= debugfs_create_dir(hdev
->name
, bt_debugfs
);
3310 dev_set_name(&hdev
->dev
, "%s", hdev
->name
);
3312 error
= device_add(&hdev
->dev
);
3316 hdev
->rfkill
= rfkill_alloc(hdev
->name
, &hdev
->dev
,
3317 RFKILL_TYPE_BLUETOOTH
, &hci_rfkill_ops
,
3320 if (rfkill_register(hdev
->rfkill
) < 0) {
3321 rfkill_destroy(hdev
->rfkill
);
3322 hdev
->rfkill
= NULL
;
3326 if (hdev
->rfkill
&& rfkill_blocked(hdev
->rfkill
))
3327 hci_dev_set_flag(hdev
, HCI_RFKILLED
);
3329 hci_dev_set_flag(hdev
, HCI_SETUP
);
3330 hci_dev_set_flag(hdev
, HCI_AUTO_OFF
);
3332 if (hdev
->dev_type
== HCI_BREDR
) {
3333 /* Assume BR/EDR support until proven otherwise (such as
3334 * through reading supported features during init.
3336 hci_dev_set_flag(hdev
, HCI_BREDR_ENABLED
);
3339 write_lock(&hci_dev_list_lock
);
3340 list_add(&hdev
->list
, &hci_dev_list
);
3341 write_unlock(&hci_dev_list_lock
);
3343 /* Devices that are marked for raw-only usage are unconfigured
3344 * and should not be included in normal operation.
3346 if (test_bit(HCI_QUIRK_RAW_DEVICE
, &hdev
->quirks
))
3347 hci_dev_set_flag(hdev
, HCI_UNCONFIGURED
);
3349 hci_notify(hdev
, HCI_DEV_REG
);
3352 queue_work(hdev
->req_workqueue
, &hdev
->power_on
);
3357 destroy_workqueue(hdev
->workqueue
);
3358 destroy_workqueue(hdev
->req_workqueue
);
3360 ida_simple_remove(&hci_index_ida
, hdev
->id
);
3364 EXPORT_SYMBOL(hci_register_dev
);
3366 /* Unregister HCI device */
3367 void hci_unregister_dev(struct hci_dev
*hdev
)
3371 BT_DBG("%p name %s bus %d", hdev
, hdev
->name
, hdev
->bus
);
3373 hci_dev_set_flag(hdev
, HCI_UNREGISTER
);
3377 write_lock(&hci_dev_list_lock
);
3378 list_del(&hdev
->list
);
3379 write_unlock(&hci_dev_list_lock
);
3381 hci_dev_do_close(hdev
);
3383 cancel_work_sync(&hdev
->power_on
);
3385 if (!test_bit(HCI_INIT
, &hdev
->flags
) &&
3386 !hci_dev_test_flag(hdev
, HCI_SETUP
) &&
3387 !hci_dev_test_flag(hdev
, HCI_CONFIG
)) {
3389 mgmt_index_removed(hdev
);
3390 hci_dev_unlock(hdev
);
3393 /* mgmt_index_removed should take care of emptying the
3395 BUG_ON(!list_empty(&hdev
->mgmt_pending
));
3397 hci_notify(hdev
, HCI_DEV_UNREG
);
3400 rfkill_unregister(hdev
->rfkill
);
3401 rfkill_destroy(hdev
->rfkill
);
3404 device_del(&hdev
->dev
);
3406 debugfs_remove_recursive(hdev
->debugfs
);
3408 destroy_workqueue(hdev
->workqueue
);
3409 destroy_workqueue(hdev
->req_workqueue
);
3412 hci_bdaddr_list_clear(&hdev
->blacklist
);
3413 hci_bdaddr_list_clear(&hdev
->whitelist
);
3414 hci_uuids_clear(hdev
);
3415 hci_link_keys_clear(hdev
);
3416 hci_smp_ltks_clear(hdev
);
3417 hci_smp_irks_clear(hdev
);
3418 hci_remote_oob_data_clear(hdev
);
3419 hci_adv_instances_clear(hdev
);
3420 hci_bdaddr_list_clear(&hdev
->le_white_list
);
3421 hci_conn_params_clear_all(hdev
);
3422 hci_discovery_filter_clear(hdev
);
3423 hci_dev_unlock(hdev
);
3427 ida_simple_remove(&hci_index_ida
, id
);
3429 EXPORT_SYMBOL(hci_unregister_dev
);
3431 /* Suspend HCI device */
3432 int hci_suspend_dev(struct hci_dev
*hdev
)
3434 hci_notify(hdev
, HCI_DEV_SUSPEND
);
3437 EXPORT_SYMBOL(hci_suspend_dev
);
3439 /* Resume HCI device */
3440 int hci_resume_dev(struct hci_dev
*hdev
)
3442 hci_notify(hdev
, HCI_DEV_RESUME
);
3445 EXPORT_SYMBOL(hci_resume_dev
);
3447 /* Reset HCI device */
3448 int hci_reset_dev(struct hci_dev
*hdev
)
3450 const u8 hw_err
[] = { HCI_EV_HARDWARE_ERROR
, 0x01, 0x00 };
3451 struct sk_buff
*skb
;
3453 skb
= bt_skb_alloc(3, GFP_ATOMIC
);
3457 bt_cb(skb
)->pkt_type
= HCI_EVENT_PKT
;
3458 memcpy(skb_put(skb
, 3), hw_err
, 3);
3460 /* Send Hardware Error to upper stack */
3461 return hci_recv_frame(hdev
, skb
);
3463 EXPORT_SYMBOL(hci_reset_dev
);
3465 /* Receive frame from HCI drivers */
3466 int hci_recv_frame(struct hci_dev
*hdev
, struct sk_buff
*skb
)
3468 if (!hdev
|| (!test_bit(HCI_UP
, &hdev
->flags
)
3469 && !test_bit(HCI_INIT
, &hdev
->flags
))) {
3475 bt_cb(skb
)->incoming
= 1;
3478 __net_timestamp(skb
);
3480 skb_queue_tail(&hdev
->rx_q
, skb
);
3481 queue_work(hdev
->workqueue
, &hdev
->rx_work
);
3485 EXPORT_SYMBOL(hci_recv_frame
);
3487 /* ---- Interface to upper protocols ---- */
3489 int hci_register_cb(struct hci_cb
*cb
)
3491 BT_DBG("%p name %s", cb
, cb
->name
);
3493 mutex_lock(&hci_cb_list_lock
);
3494 list_add_tail(&cb
->list
, &hci_cb_list
);
3495 mutex_unlock(&hci_cb_list_lock
);
3499 EXPORT_SYMBOL(hci_register_cb
);
3501 int hci_unregister_cb(struct hci_cb
*cb
)
3503 BT_DBG("%p name %s", cb
, cb
->name
);
3505 mutex_lock(&hci_cb_list_lock
);
3506 list_del(&cb
->list
);
3507 mutex_unlock(&hci_cb_list_lock
);
3511 EXPORT_SYMBOL(hci_unregister_cb
);
3513 static void hci_send_frame(struct hci_dev
*hdev
, struct sk_buff
*skb
)
3517 BT_DBG("%s type %d len %d", hdev
->name
, bt_cb(skb
)->pkt_type
, skb
->len
);
3520 __net_timestamp(skb
);
3522 /* Send copy to monitor */
3523 hci_send_to_monitor(hdev
, skb
);
3525 if (atomic_read(&hdev
->promisc
)) {
3526 /* Send copy to the sockets */
3527 hci_send_to_sock(hdev
, skb
);
3530 /* Get rid of skb owner, prior to sending to the driver. */
3533 err
= hdev
->send(hdev
, skb
);
3535 BT_ERR("%s sending frame failed (%d)", hdev
->name
, err
);
3540 /* Send HCI command */
3541 int hci_send_cmd(struct hci_dev
*hdev
, __u16 opcode
, __u32 plen
,
3544 struct sk_buff
*skb
;
3546 BT_DBG("%s opcode 0x%4.4x plen %d", hdev
->name
, opcode
, plen
);
3548 skb
= hci_prepare_cmd(hdev
, opcode
, plen
, param
);
3550 BT_ERR("%s no memory for command", hdev
->name
);
3554 /* Stand-alone HCI commands must be flagged as
3555 * single-command requests.
3557 bt_cb(skb
)->req
.start
= true;
3559 skb_queue_tail(&hdev
->cmd_q
, skb
);
3560 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
3565 /* Get data from the previously sent command */
3566 void *hci_sent_cmd_data(struct hci_dev
*hdev
, __u16 opcode
)
3568 struct hci_command_hdr
*hdr
;
3570 if (!hdev
->sent_cmd
)
3573 hdr
= (void *) hdev
->sent_cmd
->data
;
3575 if (hdr
->opcode
!= cpu_to_le16(opcode
))
3578 BT_DBG("%s opcode 0x%4.4x", hdev
->name
, opcode
);
3580 return hdev
->sent_cmd
->data
+ HCI_COMMAND_HDR_SIZE
;
3584 static void hci_add_acl_hdr(struct sk_buff
*skb
, __u16 handle
, __u16 flags
)
3586 struct hci_acl_hdr
*hdr
;
3589 skb_push(skb
, HCI_ACL_HDR_SIZE
);
3590 skb_reset_transport_header(skb
);
3591 hdr
= (struct hci_acl_hdr
*)skb_transport_header(skb
);
3592 hdr
->handle
= cpu_to_le16(hci_handle_pack(handle
, flags
));
3593 hdr
->dlen
= cpu_to_le16(len
);
3596 static void hci_queue_acl(struct hci_chan
*chan
, struct sk_buff_head
*queue
,
3597 struct sk_buff
*skb
, __u16 flags
)
3599 struct hci_conn
*conn
= chan
->conn
;
3600 struct hci_dev
*hdev
= conn
->hdev
;
3601 struct sk_buff
*list
;
3603 skb
->len
= skb_headlen(skb
);
3606 bt_cb(skb
)->pkt_type
= HCI_ACLDATA_PKT
;
3608 switch (hdev
->dev_type
) {
3610 hci_add_acl_hdr(skb
, conn
->handle
, flags
);
3613 hci_add_acl_hdr(skb
, chan
->handle
, flags
);
3616 BT_ERR("%s unknown dev_type %d", hdev
->name
, hdev
->dev_type
);
3620 list
= skb_shinfo(skb
)->frag_list
;
3622 /* Non fragmented */
3623 BT_DBG("%s nonfrag skb %p len %d", hdev
->name
, skb
, skb
->len
);
3625 skb_queue_tail(queue
, skb
);
3628 BT_DBG("%s frag %p len %d", hdev
->name
, skb
, skb
->len
);
3630 skb_shinfo(skb
)->frag_list
= NULL
;
3632 /* Queue all fragments atomically. We need to use spin_lock_bh
3633 * here because of 6LoWPAN links, as there this function is
3634 * called from softirq and using normal spin lock could cause
3637 spin_lock_bh(&queue
->lock
);
3639 __skb_queue_tail(queue
, skb
);
3641 flags
&= ~ACL_START
;
3644 skb
= list
; list
= list
->next
;
3646 bt_cb(skb
)->pkt_type
= HCI_ACLDATA_PKT
;
3647 hci_add_acl_hdr(skb
, conn
->handle
, flags
);
3649 BT_DBG("%s frag %p len %d", hdev
->name
, skb
, skb
->len
);
3651 __skb_queue_tail(queue
, skb
);
3654 spin_unlock_bh(&queue
->lock
);
3658 void hci_send_acl(struct hci_chan
*chan
, struct sk_buff
*skb
, __u16 flags
)
3660 struct hci_dev
*hdev
= chan
->conn
->hdev
;
3662 BT_DBG("%s chan %p flags 0x%4.4x", hdev
->name
, chan
, flags
);
3664 hci_queue_acl(chan
, &chan
->data_q
, skb
, flags
);
3666 queue_work(hdev
->workqueue
, &hdev
->tx_work
);
3670 void hci_send_sco(struct hci_conn
*conn
, struct sk_buff
*skb
)
3672 struct hci_dev
*hdev
= conn
->hdev
;
3673 struct hci_sco_hdr hdr
;
3675 BT_DBG("%s len %d", hdev
->name
, skb
->len
);
3677 hdr
.handle
= cpu_to_le16(conn
->handle
);
3678 hdr
.dlen
= skb
->len
;
3680 skb_push(skb
, HCI_SCO_HDR_SIZE
);
3681 skb_reset_transport_header(skb
);
3682 memcpy(skb_transport_header(skb
), &hdr
, HCI_SCO_HDR_SIZE
);
3684 bt_cb(skb
)->pkt_type
= HCI_SCODATA_PKT
;
3686 skb_queue_tail(&conn
->data_q
, skb
);
3687 queue_work(hdev
->workqueue
, &hdev
->tx_work
);
3690 /* ---- HCI TX task (outgoing data) ---- */
3692 /* HCI Connection scheduler */
3693 static struct hci_conn
*hci_low_sent(struct hci_dev
*hdev
, __u8 type
,
3696 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
3697 struct hci_conn
*conn
= NULL
, *c
;
3698 unsigned int num
= 0, min
= ~0;
3700 /* We don't have to lock device here. Connections are always
3701 * added and removed with TX task disabled. */
3705 list_for_each_entry_rcu(c
, &h
->list
, list
) {
3706 if (c
->type
!= type
|| skb_queue_empty(&c
->data_q
))
3709 if (c
->state
!= BT_CONNECTED
&& c
->state
!= BT_CONFIG
)
3714 if (c
->sent
< min
) {
3719 if (hci_conn_num(hdev
, type
) == num
)
3728 switch (conn
->type
) {
3730 cnt
= hdev
->acl_cnt
;
3734 cnt
= hdev
->sco_cnt
;
3737 cnt
= hdev
->le_mtu
? hdev
->le_cnt
: hdev
->acl_cnt
;
3741 BT_ERR("Unknown link type");
3749 BT_DBG("conn %p quote %d", conn
, *quote
);
3753 static void hci_link_tx_to(struct hci_dev
*hdev
, __u8 type
)
3755 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
3758 BT_ERR("%s link tx timeout", hdev
->name
);
3762 /* Kill stalled connections */
3763 list_for_each_entry_rcu(c
, &h
->list
, list
) {
3764 if (c
->type
== type
&& c
->sent
) {
3765 BT_ERR("%s killing stalled connection %pMR",
3766 hdev
->name
, &c
->dst
);
3767 hci_disconnect(c
, HCI_ERROR_REMOTE_USER_TERM
);
3774 static struct hci_chan
*hci_chan_sent(struct hci_dev
*hdev
, __u8 type
,
3777 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
3778 struct hci_chan
*chan
= NULL
;
3779 unsigned int num
= 0, min
= ~0, cur_prio
= 0;
3780 struct hci_conn
*conn
;
3781 int cnt
, q
, conn_num
= 0;
3783 BT_DBG("%s", hdev
->name
);
3787 list_for_each_entry_rcu(conn
, &h
->list
, list
) {
3788 struct hci_chan
*tmp
;
3790 if (conn
->type
!= type
)
3793 if (conn
->state
!= BT_CONNECTED
&& conn
->state
!= BT_CONFIG
)
3798 list_for_each_entry_rcu(tmp
, &conn
->chan_list
, list
) {
3799 struct sk_buff
*skb
;
3801 if (skb_queue_empty(&tmp
->data_q
))
3804 skb
= skb_peek(&tmp
->data_q
);
3805 if (skb
->priority
< cur_prio
)
3808 if (skb
->priority
> cur_prio
) {
3811 cur_prio
= skb
->priority
;
3816 if (conn
->sent
< min
) {
3822 if (hci_conn_num(hdev
, type
) == conn_num
)
3831 switch (chan
->conn
->type
) {
3833 cnt
= hdev
->acl_cnt
;
3836 cnt
= hdev
->block_cnt
;
3840 cnt
= hdev
->sco_cnt
;
3843 cnt
= hdev
->le_mtu
? hdev
->le_cnt
: hdev
->acl_cnt
;
3847 BT_ERR("Unknown link type");
3852 BT_DBG("chan %p quote %d", chan
, *quote
);
3856 static void hci_prio_recalculate(struct hci_dev
*hdev
, __u8 type
)
3858 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
3859 struct hci_conn
*conn
;
3862 BT_DBG("%s", hdev
->name
);
3866 list_for_each_entry_rcu(conn
, &h
->list
, list
) {
3867 struct hci_chan
*chan
;
3869 if (conn
->type
!= type
)
3872 if (conn
->state
!= BT_CONNECTED
&& conn
->state
!= BT_CONFIG
)
3877 list_for_each_entry_rcu(chan
, &conn
->chan_list
, list
) {
3878 struct sk_buff
*skb
;
3885 if (skb_queue_empty(&chan
->data_q
))
3888 skb
= skb_peek(&chan
->data_q
);
3889 if (skb
->priority
>= HCI_PRIO_MAX
- 1)
3892 skb
->priority
= HCI_PRIO_MAX
- 1;
3894 BT_DBG("chan %p skb %p promoted to %d", chan
, skb
,
3898 if (hci_conn_num(hdev
, type
) == num
)
3906 static inline int __get_blocks(struct hci_dev
*hdev
, struct sk_buff
*skb
)
3908 /* Calculate count of blocks used by this packet */
3909 return DIV_ROUND_UP(skb
->len
- HCI_ACL_HDR_SIZE
, hdev
->block_len
);
3912 static void __check_timeout(struct hci_dev
*hdev
, unsigned int cnt
)
3914 if (!hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
)) {
3915 /* ACL tx timeout must be longer than maximum
3916 * link supervision timeout (40.9 seconds) */
3917 if (!cnt
&& time_after(jiffies
, hdev
->acl_last_tx
+
3918 HCI_ACL_TX_TIMEOUT
))
3919 hci_link_tx_to(hdev
, ACL_LINK
);
3923 static void hci_sched_acl_pkt(struct hci_dev
*hdev
)
3925 unsigned int cnt
= hdev
->acl_cnt
;
3926 struct hci_chan
*chan
;
3927 struct sk_buff
*skb
;
3930 __check_timeout(hdev
, cnt
);
3932 while (hdev
->acl_cnt
&&
3933 (chan
= hci_chan_sent(hdev
, ACL_LINK
, "e
))) {
3934 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
3935 while (quote
-- && (skb
= skb_peek(&chan
->data_q
))) {
3936 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
3937 skb
->len
, skb
->priority
);
3939 /* Stop if priority has changed */
3940 if (skb
->priority
< priority
)
3943 skb
= skb_dequeue(&chan
->data_q
);
3945 hci_conn_enter_active_mode(chan
->conn
,
3946 bt_cb(skb
)->force_active
);
3948 hci_send_frame(hdev
, skb
);
3949 hdev
->acl_last_tx
= jiffies
;
3957 if (cnt
!= hdev
->acl_cnt
)
3958 hci_prio_recalculate(hdev
, ACL_LINK
);
3961 static void hci_sched_acl_blk(struct hci_dev
*hdev
)
3963 unsigned int cnt
= hdev
->block_cnt
;
3964 struct hci_chan
*chan
;
3965 struct sk_buff
*skb
;
3969 __check_timeout(hdev
, cnt
);
3971 BT_DBG("%s", hdev
->name
);
3973 if (hdev
->dev_type
== HCI_AMP
)
3978 while (hdev
->block_cnt
> 0 &&
3979 (chan
= hci_chan_sent(hdev
, type
, "e
))) {
3980 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
3981 while (quote
> 0 && (skb
= skb_peek(&chan
->data_q
))) {
3984 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
3985 skb
->len
, skb
->priority
);
3987 /* Stop if priority has changed */
3988 if (skb
->priority
< priority
)
3991 skb
= skb_dequeue(&chan
->data_q
);
3993 blocks
= __get_blocks(hdev
, skb
);
3994 if (blocks
> hdev
->block_cnt
)
3997 hci_conn_enter_active_mode(chan
->conn
,
3998 bt_cb(skb
)->force_active
);
4000 hci_send_frame(hdev
, skb
);
4001 hdev
->acl_last_tx
= jiffies
;
4003 hdev
->block_cnt
-= blocks
;
4006 chan
->sent
+= blocks
;
4007 chan
->conn
->sent
+= blocks
;
4011 if (cnt
!= hdev
->block_cnt
)
4012 hci_prio_recalculate(hdev
, type
);
4015 static void hci_sched_acl(struct hci_dev
*hdev
)
4017 BT_DBG("%s", hdev
->name
);
4019 /* No ACL link over BR/EDR controller */
4020 if (!hci_conn_num(hdev
, ACL_LINK
) && hdev
->dev_type
== HCI_BREDR
)
4023 /* No AMP link over AMP controller */
4024 if (!hci_conn_num(hdev
, AMP_LINK
) && hdev
->dev_type
== HCI_AMP
)
4027 switch (hdev
->flow_ctl_mode
) {
4028 case HCI_FLOW_CTL_MODE_PACKET_BASED
:
4029 hci_sched_acl_pkt(hdev
);
4032 case HCI_FLOW_CTL_MODE_BLOCK_BASED
:
4033 hci_sched_acl_blk(hdev
);
4039 static void hci_sched_sco(struct hci_dev
*hdev
)
4041 struct hci_conn
*conn
;
4042 struct sk_buff
*skb
;
4045 BT_DBG("%s", hdev
->name
);
4047 if (!hci_conn_num(hdev
, SCO_LINK
))
4050 while (hdev
->sco_cnt
&& (conn
= hci_low_sent(hdev
, SCO_LINK
, "e
))) {
4051 while (quote
-- && (skb
= skb_dequeue(&conn
->data_q
))) {
4052 BT_DBG("skb %p len %d", skb
, skb
->len
);
4053 hci_send_frame(hdev
, skb
);
4056 if (conn
->sent
== ~0)
4062 static void hci_sched_esco(struct hci_dev
*hdev
)
4064 struct hci_conn
*conn
;
4065 struct sk_buff
*skb
;
4068 BT_DBG("%s", hdev
->name
);
4070 if (!hci_conn_num(hdev
, ESCO_LINK
))
4073 while (hdev
->sco_cnt
&& (conn
= hci_low_sent(hdev
, ESCO_LINK
,
4075 while (quote
-- && (skb
= skb_dequeue(&conn
->data_q
))) {
4076 BT_DBG("skb %p len %d", skb
, skb
->len
);
4077 hci_send_frame(hdev
, skb
);
4080 if (conn
->sent
== ~0)
4086 static void hci_sched_le(struct hci_dev
*hdev
)
4088 struct hci_chan
*chan
;
4089 struct sk_buff
*skb
;
4090 int quote
, cnt
, tmp
;
4092 BT_DBG("%s", hdev
->name
);
4094 if (!hci_conn_num(hdev
, LE_LINK
))
4097 if (!hci_dev_test_flag(hdev
, HCI_UNCONFIGURED
)) {
4098 /* LE tx timeout must be longer than maximum
4099 * link supervision timeout (40.9 seconds) */
4100 if (!hdev
->le_cnt
&& hdev
->le_pkts
&&
4101 time_after(jiffies
, hdev
->le_last_tx
+ HZ
* 45))
4102 hci_link_tx_to(hdev
, LE_LINK
);
4105 cnt
= hdev
->le_pkts
? hdev
->le_cnt
: hdev
->acl_cnt
;
4107 while (cnt
&& (chan
= hci_chan_sent(hdev
, LE_LINK
, "e
))) {
4108 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
4109 while (quote
-- && (skb
= skb_peek(&chan
->data_q
))) {
4110 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
4111 skb
->len
, skb
->priority
);
4113 /* Stop if priority has changed */
4114 if (skb
->priority
< priority
)
4117 skb
= skb_dequeue(&chan
->data_q
);
4119 hci_send_frame(hdev
, skb
);
4120 hdev
->le_last_tx
= jiffies
;
4131 hdev
->acl_cnt
= cnt
;
4134 hci_prio_recalculate(hdev
, LE_LINK
);
4137 static void hci_tx_work(struct work_struct
*work
)
4139 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, tx_work
);
4140 struct sk_buff
*skb
;
4142 BT_DBG("%s acl %d sco %d le %d", hdev
->name
, hdev
->acl_cnt
,
4143 hdev
->sco_cnt
, hdev
->le_cnt
);
4145 if (!hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
4146 /* Schedule queues and send stuff to HCI driver */
4147 hci_sched_acl(hdev
);
4148 hci_sched_sco(hdev
);
4149 hci_sched_esco(hdev
);
4153 /* Send next queued raw (unknown type) packet */
4154 while ((skb
= skb_dequeue(&hdev
->raw_q
)))
4155 hci_send_frame(hdev
, skb
);
4158 /* ----- HCI RX task (incoming data processing) ----- */
4160 /* ACL data packet */
4161 static void hci_acldata_packet(struct hci_dev
*hdev
, struct sk_buff
*skb
)
4163 struct hci_acl_hdr
*hdr
= (void *) skb
->data
;
4164 struct hci_conn
*conn
;
4165 __u16 handle
, flags
;
4167 skb_pull(skb
, HCI_ACL_HDR_SIZE
);
4169 handle
= __le16_to_cpu(hdr
->handle
);
4170 flags
= hci_flags(handle
);
4171 handle
= hci_handle(handle
);
4173 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev
->name
, skb
->len
,
4176 hdev
->stat
.acl_rx
++;
4179 conn
= hci_conn_hash_lookup_handle(hdev
, handle
);
4180 hci_dev_unlock(hdev
);
4183 hci_conn_enter_active_mode(conn
, BT_POWER_FORCE_ACTIVE_OFF
);
4185 /* Send to upper protocol */
4186 l2cap_recv_acldata(conn
, skb
, flags
);
4189 BT_ERR("%s ACL packet for unknown connection handle %d",
4190 hdev
->name
, handle
);
4196 /* SCO data packet */
4197 static void hci_scodata_packet(struct hci_dev
*hdev
, struct sk_buff
*skb
)
4199 struct hci_sco_hdr
*hdr
= (void *) skb
->data
;
4200 struct hci_conn
*conn
;
4203 skb_pull(skb
, HCI_SCO_HDR_SIZE
);
4205 handle
= __le16_to_cpu(hdr
->handle
);
4207 BT_DBG("%s len %d handle 0x%4.4x", hdev
->name
, skb
->len
, handle
);
4209 hdev
->stat
.sco_rx
++;
4212 conn
= hci_conn_hash_lookup_handle(hdev
, handle
);
4213 hci_dev_unlock(hdev
);
4216 /* Send to upper protocol */
4217 sco_recv_scodata(conn
, skb
);
4220 BT_ERR("%s SCO packet for unknown connection handle %d",
4221 hdev
->name
, handle
);
4227 static bool hci_req_is_complete(struct hci_dev
*hdev
)
4229 struct sk_buff
*skb
;
4231 skb
= skb_peek(&hdev
->cmd_q
);
4235 return bt_cb(skb
)->req
.start
;
4238 static void hci_resend_last(struct hci_dev
*hdev
)
4240 struct hci_command_hdr
*sent
;
4241 struct sk_buff
*skb
;
4244 if (!hdev
->sent_cmd
)
4247 sent
= (void *) hdev
->sent_cmd
->data
;
4248 opcode
= __le16_to_cpu(sent
->opcode
);
4249 if (opcode
== HCI_OP_RESET
)
4252 skb
= skb_clone(hdev
->sent_cmd
, GFP_KERNEL
);
4256 skb_queue_head(&hdev
->cmd_q
, skb
);
4257 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
4260 void hci_req_cmd_complete(struct hci_dev
*hdev
, u16 opcode
, u8 status
,
4261 hci_req_complete_t
*req_complete
,
4262 hci_req_complete_skb_t
*req_complete_skb
)
4264 struct sk_buff
*skb
;
4265 unsigned long flags
;
4267 BT_DBG("opcode 0x%04x status 0x%02x", opcode
, status
);
4269 /* If the completed command doesn't match the last one that was
4270 * sent we need to do special handling of it.
4272 if (!hci_sent_cmd_data(hdev
, opcode
)) {
4273 /* Some CSR based controllers generate a spontaneous
4274 * reset complete event during init and any pending
4275 * command will never be completed. In such a case we
4276 * need to resend whatever was the last sent
4279 if (test_bit(HCI_INIT
, &hdev
->flags
) && opcode
== HCI_OP_RESET
)
4280 hci_resend_last(hdev
);
4285 /* If the command succeeded and there's still more commands in
4286 * this request the request is not yet complete.
4288 if (!status
&& !hci_req_is_complete(hdev
))
4291 /* If this was the last command in a request the complete
4292 * callback would be found in hdev->sent_cmd instead of the
4293 * command queue (hdev->cmd_q).
4295 if (bt_cb(hdev
->sent_cmd
)->req
.complete
) {
4296 *req_complete
= bt_cb(hdev
->sent_cmd
)->req
.complete
;
4300 if (bt_cb(hdev
->sent_cmd
)->req
.complete_skb
) {
4301 *req_complete_skb
= bt_cb(hdev
->sent_cmd
)->req
.complete_skb
;
4305 /* Remove all pending commands belonging to this request */
4306 spin_lock_irqsave(&hdev
->cmd_q
.lock
, flags
);
4307 while ((skb
= __skb_dequeue(&hdev
->cmd_q
))) {
4308 if (bt_cb(skb
)->req
.start
) {
4309 __skb_queue_head(&hdev
->cmd_q
, skb
);
4313 *req_complete
= bt_cb(skb
)->req
.complete
;
4314 *req_complete_skb
= bt_cb(skb
)->req
.complete_skb
;
4317 spin_unlock_irqrestore(&hdev
->cmd_q
.lock
, flags
);
4320 static void hci_rx_work(struct work_struct
*work
)
4322 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, rx_work
);
4323 struct sk_buff
*skb
;
4325 BT_DBG("%s", hdev
->name
);
4327 while ((skb
= skb_dequeue(&hdev
->rx_q
))) {
4328 /* Send copy to monitor */
4329 hci_send_to_monitor(hdev
, skb
);
4331 if (atomic_read(&hdev
->promisc
)) {
4332 /* Send copy to the sockets */
4333 hci_send_to_sock(hdev
, skb
);
4336 if (hci_dev_test_flag(hdev
, HCI_USER_CHANNEL
)) {
4341 if (test_bit(HCI_INIT
, &hdev
->flags
)) {
4342 /* Don't process data packets in this states. */
4343 switch (bt_cb(skb
)->pkt_type
) {
4344 case HCI_ACLDATA_PKT
:
4345 case HCI_SCODATA_PKT
:
4352 switch (bt_cb(skb
)->pkt_type
) {
4354 BT_DBG("%s Event packet", hdev
->name
);
4355 hci_event_packet(hdev
, skb
);
4358 case HCI_ACLDATA_PKT
:
4359 BT_DBG("%s ACL data packet", hdev
->name
);
4360 hci_acldata_packet(hdev
, skb
);
4363 case HCI_SCODATA_PKT
:
4364 BT_DBG("%s SCO data packet", hdev
->name
);
4365 hci_scodata_packet(hdev
, skb
);
4375 static void hci_cmd_work(struct work_struct
*work
)
4377 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, cmd_work
);
4378 struct sk_buff
*skb
;
4380 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev
->name
,
4381 atomic_read(&hdev
->cmd_cnt
), skb_queue_len(&hdev
->cmd_q
));
4383 /* Send queued commands */
4384 if (atomic_read(&hdev
->cmd_cnt
)) {
4385 skb
= skb_dequeue(&hdev
->cmd_q
);
4389 kfree_skb(hdev
->sent_cmd
);
4391 hdev
->sent_cmd
= skb_clone(skb
, GFP_KERNEL
);
4392 if (hdev
->sent_cmd
) {
4393 atomic_dec(&hdev
->cmd_cnt
);
4394 hci_send_frame(hdev
, skb
);
4395 if (test_bit(HCI_RESET
, &hdev
->flags
))
4396 cancel_delayed_work(&hdev
->cmd_timer
);
4398 schedule_delayed_work(&hdev
->cmd_timer
,
4401 skb_queue_head(&hdev
->cmd_q
, skb
);
4402 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);