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>
31 #include <linux/rfkill.h>
33 #include <net/bluetooth/bluetooth.h>
34 #include <net/bluetooth/hci_core.h>
36 static void hci_rx_work(struct work_struct
*work
);
37 static void hci_cmd_work(struct work_struct
*work
);
38 static void hci_tx_work(struct work_struct
*work
);
41 LIST_HEAD(hci_dev_list
);
42 DEFINE_RWLOCK(hci_dev_list_lock
);
44 /* HCI callback list */
45 LIST_HEAD(hci_cb_list
);
46 DEFINE_RWLOCK(hci_cb_list_lock
);
48 /* HCI ID Numbering */
49 static DEFINE_IDA(hci_index_ida
);
51 /* ---- HCI notifications ---- */
53 static void hci_notify(struct hci_dev
*hdev
, int event
)
55 hci_sock_dev_event(hdev
, event
);
58 /* ---- HCI requests ---- */
60 void hci_req_complete(struct hci_dev
*hdev
, __u16 cmd
, int result
)
62 BT_DBG("%s command 0x%4.4x result 0x%2.2x", hdev
->name
, cmd
, result
);
64 /* If this is the init phase check if the completed command matches
65 * the last init command, and if not just return.
67 if (test_bit(HCI_INIT
, &hdev
->flags
) && hdev
->init_last_cmd
!= cmd
) {
68 struct hci_command_hdr
*sent
= (void *) hdev
->sent_cmd
->data
;
69 u16 opcode
= __le16_to_cpu(sent
->opcode
);
72 /* Some CSR based controllers generate a spontaneous
73 * reset complete event during init and any pending
74 * command will never be completed. In such a case we
75 * need to resend whatever was the last sent
79 if (cmd
!= HCI_OP_RESET
|| opcode
== HCI_OP_RESET
)
82 skb
= skb_clone(hdev
->sent_cmd
, GFP_ATOMIC
);
84 skb_queue_head(&hdev
->cmd_q
, skb
);
85 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
91 if (hdev
->req_status
== HCI_REQ_PEND
) {
92 hdev
->req_result
= result
;
93 hdev
->req_status
= HCI_REQ_DONE
;
94 wake_up_interruptible(&hdev
->req_wait_q
);
98 static void hci_req_cancel(struct hci_dev
*hdev
, int err
)
100 BT_DBG("%s err 0x%2.2x", hdev
->name
, err
);
102 if (hdev
->req_status
== HCI_REQ_PEND
) {
103 hdev
->req_result
= err
;
104 hdev
->req_status
= HCI_REQ_CANCELED
;
105 wake_up_interruptible(&hdev
->req_wait_q
);
109 /* Execute request and wait for completion. */
110 static int __hci_request(struct hci_dev
*hdev
,
111 void (*req
)(struct hci_dev
*hdev
, unsigned long opt
),
112 unsigned long opt
, __u32 timeout
)
114 DECLARE_WAITQUEUE(wait
, current
);
117 BT_DBG("%s start", hdev
->name
);
119 hdev
->req_status
= HCI_REQ_PEND
;
121 add_wait_queue(&hdev
->req_wait_q
, &wait
);
122 set_current_state(TASK_INTERRUPTIBLE
);
125 schedule_timeout(timeout
);
127 remove_wait_queue(&hdev
->req_wait_q
, &wait
);
129 if (signal_pending(current
))
132 switch (hdev
->req_status
) {
134 err
= -bt_to_errno(hdev
->req_result
);
137 case HCI_REQ_CANCELED
:
138 err
= -hdev
->req_result
;
146 hdev
->req_status
= hdev
->req_result
= 0;
148 BT_DBG("%s end: err %d", hdev
->name
, err
);
153 static int hci_request(struct hci_dev
*hdev
,
154 void (*req
)(struct hci_dev
*hdev
, unsigned long opt
),
155 unsigned long opt
, __u32 timeout
)
159 if (!test_bit(HCI_UP
, &hdev
->flags
))
162 /* Serialize all requests */
164 ret
= __hci_request(hdev
, req
, opt
, timeout
);
165 hci_req_unlock(hdev
);
170 static void hci_reset_req(struct hci_dev
*hdev
, unsigned long opt
)
172 BT_DBG("%s %ld", hdev
->name
, opt
);
175 set_bit(HCI_RESET
, &hdev
->flags
);
176 hci_send_cmd(hdev
, HCI_OP_RESET
, 0, NULL
);
179 static void bredr_init(struct hci_dev
*hdev
)
181 struct hci_cp_delete_stored_link_key cp
;
185 hdev
->flow_ctl_mode
= HCI_FLOW_CTL_MODE_PACKET_BASED
;
187 /* Mandatory initialization */
189 /* Read Local Supported Features */
190 hci_send_cmd(hdev
, HCI_OP_READ_LOCAL_FEATURES
, 0, NULL
);
192 /* Read Local Version */
193 hci_send_cmd(hdev
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
195 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
196 hci_send_cmd(hdev
, HCI_OP_READ_BUFFER_SIZE
, 0, NULL
);
198 /* Read BD Address */
199 hci_send_cmd(hdev
, HCI_OP_READ_BD_ADDR
, 0, NULL
);
201 /* Read Class of Device */
202 hci_send_cmd(hdev
, HCI_OP_READ_CLASS_OF_DEV
, 0, NULL
);
204 /* Read Local Name */
205 hci_send_cmd(hdev
, HCI_OP_READ_LOCAL_NAME
, 0, NULL
);
207 /* Read Voice Setting */
208 hci_send_cmd(hdev
, HCI_OP_READ_VOICE_SETTING
, 0, NULL
);
210 /* Optional initialization */
212 /* Clear Event Filters */
213 flt_type
= HCI_FLT_CLEAR_ALL
;
214 hci_send_cmd(hdev
, HCI_OP_SET_EVENT_FLT
, 1, &flt_type
);
216 /* Connection accept timeout ~20 secs */
217 param
= __constant_cpu_to_le16(0x7d00);
218 hci_send_cmd(hdev
, HCI_OP_WRITE_CA_TIMEOUT
, 2, ¶m
);
220 bacpy(&cp
.bdaddr
, BDADDR_ANY
);
222 hci_send_cmd(hdev
, HCI_OP_DELETE_STORED_LINK_KEY
, sizeof(cp
), &cp
);
225 static void amp_init(struct hci_dev
*hdev
)
227 hdev
->flow_ctl_mode
= HCI_FLOW_CTL_MODE_BLOCK_BASED
;
229 /* Read Local Version */
230 hci_send_cmd(hdev
, HCI_OP_READ_LOCAL_VERSION
, 0, NULL
);
232 /* Read Local AMP Info */
233 hci_send_cmd(hdev
, HCI_OP_READ_LOCAL_AMP_INFO
, 0, NULL
);
236 static void hci_init_req(struct hci_dev
*hdev
, unsigned long opt
)
240 BT_DBG("%s %ld", hdev
->name
, opt
);
242 /* Driver initialization */
244 /* Special commands */
245 while ((skb
= skb_dequeue(&hdev
->driver_init
))) {
246 bt_cb(skb
)->pkt_type
= HCI_COMMAND_PKT
;
247 skb
->dev
= (void *) hdev
;
249 skb_queue_tail(&hdev
->cmd_q
, skb
);
250 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
252 skb_queue_purge(&hdev
->driver_init
);
255 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
))
256 hci_reset_req(hdev
, 0);
258 switch (hdev
->dev_type
) {
268 BT_ERR("Unknown device type %d", hdev
->dev_type
);
274 static void hci_le_init_req(struct hci_dev
*hdev
, unsigned long opt
)
276 BT_DBG("%s", hdev
->name
);
278 /* Read LE buffer size */
279 hci_send_cmd(hdev
, HCI_OP_LE_READ_BUFFER_SIZE
, 0, NULL
);
282 static void hci_scan_req(struct hci_dev
*hdev
, unsigned long opt
)
286 BT_DBG("%s %x", hdev
->name
, scan
);
288 /* Inquiry and Page scans */
289 hci_send_cmd(hdev
, HCI_OP_WRITE_SCAN_ENABLE
, 1, &scan
);
292 static void hci_auth_req(struct hci_dev
*hdev
, unsigned long opt
)
296 BT_DBG("%s %x", hdev
->name
, auth
);
299 hci_send_cmd(hdev
, HCI_OP_WRITE_AUTH_ENABLE
, 1, &auth
);
302 static void hci_encrypt_req(struct hci_dev
*hdev
, unsigned long opt
)
306 BT_DBG("%s %x", hdev
->name
, encrypt
);
309 hci_send_cmd(hdev
, HCI_OP_WRITE_ENCRYPT_MODE
, 1, &encrypt
);
312 static void hci_linkpol_req(struct hci_dev
*hdev
, unsigned long opt
)
314 __le16 policy
= cpu_to_le16(opt
);
316 BT_DBG("%s %x", hdev
->name
, policy
);
318 /* Default link policy */
319 hci_send_cmd(hdev
, HCI_OP_WRITE_DEF_LINK_POLICY
, 2, &policy
);
322 /* Get HCI device by index.
323 * Device is held on return. */
324 struct hci_dev
*hci_dev_get(int index
)
326 struct hci_dev
*hdev
= NULL
, *d
;
333 read_lock(&hci_dev_list_lock
);
334 list_for_each_entry(d
, &hci_dev_list
, list
) {
335 if (d
->id
== index
) {
336 hdev
= hci_dev_hold(d
);
340 read_unlock(&hci_dev_list_lock
);
344 /* ---- Inquiry support ---- */
346 bool hci_discovery_active(struct hci_dev
*hdev
)
348 struct discovery_state
*discov
= &hdev
->discovery
;
350 switch (discov
->state
) {
351 case DISCOVERY_FINDING
:
352 case DISCOVERY_RESOLVING
:
360 void hci_discovery_set_state(struct hci_dev
*hdev
, int state
)
362 BT_DBG("%s state %u -> %u", hdev
->name
, hdev
->discovery
.state
, state
);
364 if (hdev
->discovery
.state
== state
)
368 case DISCOVERY_STOPPED
:
369 if (hdev
->discovery
.state
!= DISCOVERY_STARTING
)
370 mgmt_discovering(hdev
, 0);
372 case DISCOVERY_STARTING
:
374 case DISCOVERY_FINDING
:
375 mgmt_discovering(hdev
, 1);
377 case DISCOVERY_RESOLVING
:
379 case DISCOVERY_STOPPING
:
383 hdev
->discovery
.state
= state
;
386 static void inquiry_cache_flush(struct hci_dev
*hdev
)
388 struct discovery_state
*cache
= &hdev
->discovery
;
389 struct inquiry_entry
*p
, *n
;
391 list_for_each_entry_safe(p
, n
, &cache
->all
, all
) {
396 INIT_LIST_HEAD(&cache
->unknown
);
397 INIT_LIST_HEAD(&cache
->resolve
);
400 struct inquiry_entry
*hci_inquiry_cache_lookup(struct hci_dev
*hdev
,
403 struct discovery_state
*cache
= &hdev
->discovery
;
404 struct inquiry_entry
*e
;
406 BT_DBG("cache %p, %s", cache
, batostr(bdaddr
));
408 list_for_each_entry(e
, &cache
->all
, all
) {
409 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
416 struct inquiry_entry
*hci_inquiry_cache_lookup_unknown(struct hci_dev
*hdev
,
419 struct discovery_state
*cache
= &hdev
->discovery
;
420 struct inquiry_entry
*e
;
422 BT_DBG("cache %p, %s", cache
, batostr(bdaddr
));
424 list_for_each_entry(e
, &cache
->unknown
, list
) {
425 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
432 struct inquiry_entry
*hci_inquiry_cache_lookup_resolve(struct hci_dev
*hdev
,
436 struct discovery_state
*cache
= &hdev
->discovery
;
437 struct inquiry_entry
*e
;
439 BT_DBG("cache %p bdaddr %s state %d", cache
, batostr(bdaddr
), state
);
441 list_for_each_entry(e
, &cache
->resolve
, list
) {
442 if (!bacmp(bdaddr
, BDADDR_ANY
) && e
->name_state
== state
)
444 if (!bacmp(&e
->data
.bdaddr
, bdaddr
))
451 void hci_inquiry_cache_update_resolve(struct hci_dev
*hdev
,
452 struct inquiry_entry
*ie
)
454 struct discovery_state
*cache
= &hdev
->discovery
;
455 struct list_head
*pos
= &cache
->resolve
;
456 struct inquiry_entry
*p
;
460 list_for_each_entry(p
, &cache
->resolve
, list
) {
461 if (p
->name_state
!= NAME_PENDING
&&
462 abs(p
->data
.rssi
) >= abs(ie
->data
.rssi
))
467 list_add(&ie
->list
, pos
);
470 bool hci_inquiry_cache_update(struct hci_dev
*hdev
, struct inquiry_data
*data
,
471 bool name_known
, bool *ssp
)
473 struct discovery_state
*cache
= &hdev
->discovery
;
474 struct inquiry_entry
*ie
;
476 BT_DBG("cache %p, %s", cache
, batostr(&data
->bdaddr
));
479 *ssp
= data
->ssp_mode
;
481 ie
= hci_inquiry_cache_lookup(hdev
, &data
->bdaddr
);
483 if (ie
->data
.ssp_mode
&& ssp
)
486 if (ie
->name_state
== NAME_NEEDED
&&
487 data
->rssi
!= ie
->data
.rssi
) {
488 ie
->data
.rssi
= data
->rssi
;
489 hci_inquiry_cache_update_resolve(hdev
, ie
);
495 /* Entry not in the cache. Add new one. */
496 ie
= kzalloc(sizeof(struct inquiry_entry
), GFP_ATOMIC
);
500 list_add(&ie
->all
, &cache
->all
);
503 ie
->name_state
= NAME_KNOWN
;
505 ie
->name_state
= NAME_NOT_KNOWN
;
506 list_add(&ie
->list
, &cache
->unknown
);
510 if (name_known
&& ie
->name_state
!= NAME_KNOWN
&&
511 ie
->name_state
!= NAME_PENDING
) {
512 ie
->name_state
= NAME_KNOWN
;
516 memcpy(&ie
->data
, data
, sizeof(*data
));
517 ie
->timestamp
= jiffies
;
518 cache
->timestamp
= jiffies
;
520 if (ie
->name_state
== NAME_NOT_KNOWN
)
526 static int inquiry_cache_dump(struct hci_dev
*hdev
, int num
, __u8
*buf
)
528 struct discovery_state
*cache
= &hdev
->discovery
;
529 struct inquiry_info
*info
= (struct inquiry_info
*) buf
;
530 struct inquiry_entry
*e
;
533 list_for_each_entry(e
, &cache
->all
, all
) {
534 struct inquiry_data
*data
= &e
->data
;
539 bacpy(&info
->bdaddr
, &data
->bdaddr
);
540 info
->pscan_rep_mode
= data
->pscan_rep_mode
;
541 info
->pscan_period_mode
= data
->pscan_period_mode
;
542 info
->pscan_mode
= data
->pscan_mode
;
543 memcpy(info
->dev_class
, data
->dev_class
, 3);
544 info
->clock_offset
= data
->clock_offset
;
550 BT_DBG("cache %p, copied %d", cache
, copied
);
554 static void hci_inq_req(struct hci_dev
*hdev
, unsigned long opt
)
556 struct hci_inquiry_req
*ir
= (struct hci_inquiry_req
*) opt
;
557 struct hci_cp_inquiry cp
;
559 BT_DBG("%s", hdev
->name
);
561 if (test_bit(HCI_INQUIRY
, &hdev
->flags
))
565 memcpy(&cp
.lap
, &ir
->lap
, 3);
566 cp
.length
= ir
->length
;
567 cp
.num_rsp
= ir
->num_rsp
;
568 hci_send_cmd(hdev
, HCI_OP_INQUIRY
, sizeof(cp
), &cp
);
571 int hci_inquiry(void __user
*arg
)
573 __u8 __user
*ptr
= arg
;
574 struct hci_inquiry_req ir
;
575 struct hci_dev
*hdev
;
576 int err
= 0, do_inquiry
= 0, max_rsp
;
580 if (copy_from_user(&ir
, ptr
, sizeof(ir
)))
583 hdev
= hci_dev_get(ir
.dev_id
);
588 if (inquiry_cache_age(hdev
) > INQUIRY_CACHE_AGE_MAX
||
589 inquiry_cache_empty(hdev
) || ir
.flags
& IREQ_CACHE_FLUSH
) {
590 inquiry_cache_flush(hdev
);
593 hci_dev_unlock(hdev
);
595 timeo
= ir
.length
* msecs_to_jiffies(2000);
598 err
= hci_request(hdev
, hci_inq_req
, (unsigned long)&ir
, timeo
);
603 /* for unlimited number of responses we will use buffer with
606 max_rsp
= (ir
.num_rsp
== 0) ? 255 : ir
.num_rsp
;
608 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
609 * copy it to the user space.
611 buf
= kmalloc(sizeof(struct inquiry_info
) * max_rsp
, GFP_KERNEL
);
618 ir
.num_rsp
= inquiry_cache_dump(hdev
, max_rsp
, buf
);
619 hci_dev_unlock(hdev
);
621 BT_DBG("num_rsp %d", ir
.num_rsp
);
623 if (!copy_to_user(ptr
, &ir
, sizeof(ir
))) {
625 if (copy_to_user(ptr
, buf
, sizeof(struct inquiry_info
) *
638 /* ---- HCI ioctl helpers ---- */
640 int hci_dev_open(__u16 dev
)
642 struct hci_dev
*hdev
;
645 hdev
= hci_dev_get(dev
);
649 BT_DBG("%s %p", hdev
->name
, hdev
);
653 if (test_bit(HCI_UNREGISTER
, &hdev
->dev_flags
)) {
658 if (hdev
->rfkill
&& rfkill_blocked(hdev
->rfkill
)) {
663 if (test_bit(HCI_UP
, &hdev
->flags
)) {
668 if (test_bit(HCI_QUIRK_RAW_DEVICE
, &hdev
->quirks
))
669 set_bit(HCI_RAW
, &hdev
->flags
);
671 /* Treat all non BR/EDR controllers as raw devices if
672 enable_hs is not set */
673 if (hdev
->dev_type
!= HCI_BREDR
&& !enable_hs
)
674 set_bit(HCI_RAW
, &hdev
->flags
);
676 if (hdev
->open(hdev
)) {
681 if (!test_bit(HCI_RAW
, &hdev
->flags
)) {
682 atomic_set(&hdev
->cmd_cnt
, 1);
683 set_bit(HCI_INIT
, &hdev
->flags
);
684 hdev
->init_last_cmd
= 0;
686 ret
= __hci_request(hdev
, hci_init_req
, 0, HCI_INIT_TIMEOUT
);
688 if (lmp_host_le_capable(hdev
))
689 ret
= __hci_request(hdev
, hci_le_init_req
, 0,
692 clear_bit(HCI_INIT
, &hdev
->flags
);
697 set_bit(HCI_UP
, &hdev
->flags
);
698 hci_notify(hdev
, HCI_DEV_UP
);
699 if (!test_bit(HCI_SETUP
, &hdev
->dev_flags
)) {
701 mgmt_powered(hdev
, 1);
702 hci_dev_unlock(hdev
);
705 /* Init failed, cleanup */
706 flush_work(&hdev
->tx_work
);
707 flush_work(&hdev
->cmd_work
);
708 flush_work(&hdev
->rx_work
);
710 skb_queue_purge(&hdev
->cmd_q
);
711 skb_queue_purge(&hdev
->rx_q
);
716 if (hdev
->sent_cmd
) {
717 kfree_skb(hdev
->sent_cmd
);
718 hdev
->sent_cmd
= NULL
;
726 hci_req_unlock(hdev
);
731 static int hci_dev_do_close(struct hci_dev
*hdev
)
733 BT_DBG("%s %p", hdev
->name
, hdev
);
735 cancel_work_sync(&hdev
->le_scan
);
737 hci_req_cancel(hdev
, ENODEV
);
740 if (!test_and_clear_bit(HCI_UP
, &hdev
->flags
)) {
741 del_timer_sync(&hdev
->cmd_timer
);
742 hci_req_unlock(hdev
);
746 /* Flush RX and TX works */
747 flush_work(&hdev
->tx_work
);
748 flush_work(&hdev
->rx_work
);
750 if (hdev
->discov_timeout
> 0) {
751 cancel_delayed_work(&hdev
->discov_off
);
752 hdev
->discov_timeout
= 0;
753 clear_bit(HCI_DISCOVERABLE
, &hdev
->dev_flags
);
756 if (test_and_clear_bit(HCI_SERVICE_CACHE
, &hdev
->dev_flags
))
757 cancel_delayed_work(&hdev
->service_cache
);
759 cancel_delayed_work_sync(&hdev
->le_scan_disable
);
762 inquiry_cache_flush(hdev
);
763 hci_conn_hash_flush(hdev
);
764 hci_dev_unlock(hdev
);
766 hci_notify(hdev
, HCI_DEV_DOWN
);
772 skb_queue_purge(&hdev
->cmd_q
);
773 atomic_set(&hdev
->cmd_cnt
, 1);
774 if (!test_bit(HCI_RAW
, &hdev
->flags
) &&
775 test_bit(HCI_QUIRK_RESET_ON_CLOSE
, &hdev
->quirks
)) {
776 set_bit(HCI_INIT
, &hdev
->flags
);
777 __hci_request(hdev
, hci_reset_req
, 0, HCI_CMD_TIMEOUT
);
778 clear_bit(HCI_INIT
, &hdev
->flags
);
782 flush_work(&hdev
->cmd_work
);
785 skb_queue_purge(&hdev
->rx_q
);
786 skb_queue_purge(&hdev
->cmd_q
);
787 skb_queue_purge(&hdev
->raw_q
);
789 /* Drop last sent command */
790 if (hdev
->sent_cmd
) {
791 del_timer_sync(&hdev
->cmd_timer
);
792 kfree_skb(hdev
->sent_cmd
);
793 hdev
->sent_cmd
= NULL
;
796 /* After this point our queues are empty
797 * and no tasks are scheduled. */
800 if (!test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
)) {
802 mgmt_powered(hdev
, 0);
803 hci_dev_unlock(hdev
);
809 memset(hdev
->eir
, 0, sizeof(hdev
->eir
));
810 memset(hdev
->dev_class
, 0, sizeof(hdev
->dev_class
));
812 hci_req_unlock(hdev
);
818 int hci_dev_close(__u16 dev
)
820 struct hci_dev
*hdev
;
823 hdev
= hci_dev_get(dev
);
827 if (test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
828 cancel_delayed_work(&hdev
->power_off
);
830 err
= hci_dev_do_close(hdev
);
836 int hci_dev_reset(__u16 dev
)
838 struct hci_dev
*hdev
;
841 hdev
= hci_dev_get(dev
);
847 if (!test_bit(HCI_UP
, &hdev
->flags
))
851 skb_queue_purge(&hdev
->rx_q
);
852 skb_queue_purge(&hdev
->cmd_q
);
855 inquiry_cache_flush(hdev
);
856 hci_conn_hash_flush(hdev
);
857 hci_dev_unlock(hdev
);
862 atomic_set(&hdev
->cmd_cnt
, 1);
863 hdev
->acl_cnt
= 0; hdev
->sco_cnt
= 0; hdev
->le_cnt
= 0;
865 if (!test_bit(HCI_RAW
, &hdev
->flags
))
866 ret
= __hci_request(hdev
, hci_reset_req
, 0, HCI_INIT_TIMEOUT
);
869 hci_req_unlock(hdev
);
874 int hci_dev_reset_stat(__u16 dev
)
876 struct hci_dev
*hdev
;
879 hdev
= hci_dev_get(dev
);
883 memset(&hdev
->stat
, 0, sizeof(struct hci_dev_stats
));
890 int hci_dev_cmd(unsigned int cmd
, void __user
*arg
)
892 struct hci_dev
*hdev
;
893 struct hci_dev_req dr
;
896 if (copy_from_user(&dr
, arg
, sizeof(dr
)))
899 hdev
= hci_dev_get(dr
.dev_id
);
905 err
= hci_request(hdev
, hci_auth_req
, dr
.dev_opt
,
910 if (!lmp_encrypt_capable(hdev
)) {
915 if (!test_bit(HCI_AUTH
, &hdev
->flags
)) {
916 /* Auth must be enabled first */
917 err
= hci_request(hdev
, hci_auth_req
, dr
.dev_opt
,
923 err
= hci_request(hdev
, hci_encrypt_req
, dr
.dev_opt
,
928 err
= hci_request(hdev
, hci_scan_req
, dr
.dev_opt
,
933 err
= hci_request(hdev
, hci_linkpol_req
, dr
.dev_opt
,
938 hdev
->link_mode
= ((__u16
) dr
.dev_opt
) &
939 (HCI_LM_MASTER
| HCI_LM_ACCEPT
);
943 hdev
->pkt_type
= (__u16
) dr
.dev_opt
;
947 hdev
->acl_mtu
= *((__u16
*) &dr
.dev_opt
+ 1);
948 hdev
->acl_pkts
= *((__u16
*) &dr
.dev_opt
+ 0);
952 hdev
->sco_mtu
= *((__u16
*) &dr
.dev_opt
+ 1);
953 hdev
->sco_pkts
= *((__u16
*) &dr
.dev_opt
+ 0);
965 int hci_get_dev_list(void __user
*arg
)
967 struct hci_dev
*hdev
;
968 struct hci_dev_list_req
*dl
;
969 struct hci_dev_req
*dr
;
970 int n
= 0, size
, err
;
973 if (get_user(dev_num
, (__u16 __user
*) arg
))
976 if (!dev_num
|| dev_num
> (PAGE_SIZE
* 2) / sizeof(*dr
))
979 size
= sizeof(*dl
) + dev_num
* sizeof(*dr
);
981 dl
= kzalloc(size
, GFP_KERNEL
);
987 read_lock(&hci_dev_list_lock
);
988 list_for_each_entry(hdev
, &hci_dev_list
, list
) {
989 if (test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
990 cancel_delayed_work(&hdev
->power_off
);
992 if (!test_bit(HCI_MGMT
, &hdev
->dev_flags
))
993 set_bit(HCI_PAIRABLE
, &hdev
->dev_flags
);
995 (dr
+ n
)->dev_id
= hdev
->id
;
996 (dr
+ n
)->dev_opt
= hdev
->flags
;
1001 read_unlock(&hci_dev_list_lock
);
1004 size
= sizeof(*dl
) + n
* sizeof(*dr
);
1006 err
= copy_to_user(arg
, dl
, size
);
1009 return err
? -EFAULT
: 0;
1012 int hci_get_dev_info(void __user
*arg
)
1014 struct hci_dev
*hdev
;
1015 struct hci_dev_info di
;
1018 if (copy_from_user(&di
, arg
, sizeof(di
)))
1021 hdev
= hci_dev_get(di
.dev_id
);
1025 if (test_and_clear_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
1026 cancel_delayed_work_sync(&hdev
->power_off
);
1028 if (!test_bit(HCI_MGMT
, &hdev
->dev_flags
))
1029 set_bit(HCI_PAIRABLE
, &hdev
->dev_flags
);
1031 strcpy(di
.name
, hdev
->name
);
1032 di
.bdaddr
= hdev
->bdaddr
;
1033 di
.type
= (hdev
->bus
& 0x0f) | (hdev
->dev_type
<< 4);
1034 di
.flags
= hdev
->flags
;
1035 di
.pkt_type
= hdev
->pkt_type
;
1036 di
.acl_mtu
= hdev
->acl_mtu
;
1037 di
.acl_pkts
= hdev
->acl_pkts
;
1038 di
.sco_mtu
= hdev
->sco_mtu
;
1039 di
.sco_pkts
= hdev
->sco_pkts
;
1040 di
.link_policy
= hdev
->link_policy
;
1041 di
.link_mode
= hdev
->link_mode
;
1043 memcpy(&di
.stat
, &hdev
->stat
, sizeof(di
.stat
));
1044 memcpy(&di
.features
, &hdev
->features
, sizeof(di
.features
));
1046 if (copy_to_user(arg
, &di
, sizeof(di
)))
1054 /* ---- Interface to HCI drivers ---- */
1056 static int hci_rfkill_set_block(void *data
, bool blocked
)
1058 struct hci_dev
*hdev
= data
;
1060 BT_DBG("%p name %s blocked %d", hdev
, hdev
->name
, blocked
);
1065 hci_dev_do_close(hdev
);
1070 static const struct rfkill_ops hci_rfkill_ops
= {
1071 .set_block
= hci_rfkill_set_block
,
1074 static void hci_power_on(struct work_struct
*work
)
1076 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, power_on
);
1078 BT_DBG("%s", hdev
->name
);
1080 if (hci_dev_open(hdev
->id
) < 0)
1083 if (test_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
))
1084 schedule_delayed_work(&hdev
->power_off
, HCI_AUTO_OFF_TIMEOUT
);
1086 if (test_and_clear_bit(HCI_SETUP
, &hdev
->dev_flags
))
1087 mgmt_index_added(hdev
);
1090 static void hci_power_off(struct work_struct
*work
)
1092 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
1095 BT_DBG("%s", hdev
->name
);
1097 hci_dev_do_close(hdev
);
1100 static void hci_discov_off(struct work_struct
*work
)
1102 struct hci_dev
*hdev
;
1103 u8 scan
= SCAN_PAGE
;
1105 hdev
= container_of(work
, struct hci_dev
, discov_off
.work
);
1107 BT_DBG("%s", hdev
->name
);
1111 hci_send_cmd(hdev
, HCI_OP_WRITE_SCAN_ENABLE
, sizeof(scan
), &scan
);
1113 hdev
->discov_timeout
= 0;
1115 hci_dev_unlock(hdev
);
1118 int hci_uuids_clear(struct hci_dev
*hdev
)
1120 struct list_head
*p
, *n
;
1122 list_for_each_safe(p
, n
, &hdev
->uuids
) {
1123 struct bt_uuid
*uuid
;
1125 uuid
= list_entry(p
, struct bt_uuid
, list
);
1134 int hci_link_keys_clear(struct hci_dev
*hdev
)
1136 struct list_head
*p
, *n
;
1138 list_for_each_safe(p
, n
, &hdev
->link_keys
) {
1139 struct link_key
*key
;
1141 key
= list_entry(p
, struct link_key
, list
);
1150 int hci_smp_ltks_clear(struct hci_dev
*hdev
)
1152 struct smp_ltk
*k
, *tmp
;
1154 list_for_each_entry_safe(k
, tmp
, &hdev
->long_term_keys
, list
) {
1162 struct link_key
*hci_find_link_key(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
1166 list_for_each_entry(k
, &hdev
->link_keys
, list
)
1167 if (bacmp(bdaddr
, &k
->bdaddr
) == 0)
1173 static bool hci_persistent_key(struct hci_dev
*hdev
, struct hci_conn
*conn
,
1174 u8 key_type
, u8 old_key_type
)
1177 if (key_type
< 0x03)
1180 /* Debug keys are insecure so don't store them persistently */
1181 if (key_type
== HCI_LK_DEBUG_COMBINATION
)
1184 /* Changed combination key and there's no previous one */
1185 if (key_type
== HCI_LK_CHANGED_COMBINATION
&& old_key_type
== 0xff)
1188 /* Security mode 3 case */
1192 /* Neither local nor remote side had no-bonding as requirement */
1193 if (conn
->auth_type
> 0x01 && conn
->remote_auth
> 0x01)
1196 /* Local side had dedicated bonding as requirement */
1197 if (conn
->auth_type
== 0x02 || conn
->auth_type
== 0x03)
1200 /* Remote side had dedicated bonding as requirement */
1201 if (conn
->remote_auth
== 0x02 || conn
->remote_auth
== 0x03)
1204 /* If none of the above criteria match, then don't store the key
1209 struct smp_ltk
*hci_find_ltk(struct hci_dev
*hdev
, __le16 ediv
, u8 rand
[8])
1213 list_for_each_entry(k
, &hdev
->long_term_keys
, list
) {
1214 if (k
->ediv
!= ediv
||
1215 memcmp(rand
, k
->rand
, sizeof(k
->rand
)))
1224 struct smp_ltk
*hci_find_ltk_by_addr(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
,
1229 list_for_each_entry(k
, &hdev
->long_term_keys
, list
)
1230 if (addr_type
== k
->bdaddr_type
&&
1231 bacmp(bdaddr
, &k
->bdaddr
) == 0)
1237 int hci_add_link_key(struct hci_dev
*hdev
, struct hci_conn
*conn
, int new_key
,
1238 bdaddr_t
*bdaddr
, u8
*val
, u8 type
, u8 pin_len
)
1240 struct link_key
*key
, *old_key
;
1244 old_key
= hci_find_link_key(hdev
, bdaddr
);
1246 old_key_type
= old_key
->type
;
1249 old_key_type
= conn
? conn
->key_type
: 0xff;
1250 key
= kzalloc(sizeof(*key
), GFP_ATOMIC
);
1253 list_add(&key
->list
, &hdev
->link_keys
);
1256 BT_DBG("%s key for %s type %u", hdev
->name
, batostr(bdaddr
), type
);
1258 /* Some buggy controller combinations generate a changed
1259 * combination key for legacy pairing even when there's no
1261 if (type
== HCI_LK_CHANGED_COMBINATION
&&
1262 (!conn
|| conn
->remote_auth
== 0xff) && old_key_type
== 0xff) {
1263 type
= HCI_LK_COMBINATION
;
1265 conn
->key_type
= type
;
1268 bacpy(&key
->bdaddr
, bdaddr
);
1269 memcpy(key
->val
, val
, HCI_LINK_KEY_SIZE
);
1270 key
->pin_len
= pin_len
;
1272 if (type
== HCI_LK_CHANGED_COMBINATION
)
1273 key
->type
= old_key_type
;
1280 persistent
= hci_persistent_key(hdev
, conn
, type
, old_key_type
);
1282 mgmt_new_link_key(hdev
, key
, persistent
);
1285 conn
->flush_key
= !persistent
;
1290 int hci_add_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 addr_type
, u8 type
,
1291 int new_key
, u8 authenticated
, u8 tk
[16], u8 enc_size
, __le16
1294 struct smp_ltk
*key
, *old_key
;
1296 if (!(type
& HCI_SMP_STK
) && !(type
& HCI_SMP_LTK
))
1299 old_key
= hci_find_ltk_by_addr(hdev
, bdaddr
, addr_type
);
1303 key
= kzalloc(sizeof(*key
), GFP_ATOMIC
);
1306 list_add(&key
->list
, &hdev
->long_term_keys
);
1309 bacpy(&key
->bdaddr
, bdaddr
);
1310 key
->bdaddr_type
= addr_type
;
1311 memcpy(key
->val
, tk
, sizeof(key
->val
));
1312 key
->authenticated
= authenticated
;
1314 key
->enc_size
= enc_size
;
1316 memcpy(key
->rand
, rand
, sizeof(key
->rand
));
1321 if (type
& HCI_SMP_LTK
)
1322 mgmt_new_ltk(hdev
, key
, 1);
1327 int hci_remove_link_key(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
1329 struct link_key
*key
;
1331 key
= hci_find_link_key(hdev
, bdaddr
);
1335 BT_DBG("%s removing %s", hdev
->name
, batostr(bdaddr
));
1337 list_del(&key
->list
);
1343 int hci_remove_ltk(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
1345 struct smp_ltk
*k
, *tmp
;
1347 list_for_each_entry_safe(k
, tmp
, &hdev
->long_term_keys
, list
) {
1348 if (bacmp(bdaddr
, &k
->bdaddr
))
1351 BT_DBG("%s removing %s", hdev
->name
, batostr(bdaddr
));
1360 /* HCI command timer function */
1361 static void hci_cmd_timeout(unsigned long arg
)
1363 struct hci_dev
*hdev
= (void *) arg
;
1365 if (hdev
->sent_cmd
) {
1366 struct hci_command_hdr
*sent
= (void *) hdev
->sent_cmd
->data
;
1367 u16 opcode
= __le16_to_cpu(sent
->opcode
);
1369 BT_ERR("%s command 0x%4.4x tx timeout", hdev
->name
, opcode
);
1371 BT_ERR("%s command tx timeout", hdev
->name
);
1374 atomic_set(&hdev
->cmd_cnt
, 1);
1375 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
1378 struct oob_data
*hci_find_remote_oob_data(struct hci_dev
*hdev
,
1381 struct oob_data
*data
;
1383 list_for_each_entry(data
, &hdev
->remote_oob_data
, list
)
1384 if (bacmp(bdaddr
, &data
->bdaddr
) == 0)
1390 int hci_remove_remote_oob_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
1392 struct oob_data
*data
;
1394 data
= hci_find_remote_oob_data(hdev
, bdaddr
);
1398 BT_DBG("%s removing %s", hdev
->name
, batostr(bdaddr
));
1400 list_del(&data
->list
);
1406 int hci_remote_oob_data_clear(struct hci_dev
*hdev
)
1408 struct oob_data
*data
, *n
;
1410 list_for_each_entry_safe(data
, n
, &hdev
->remote_oob_data
, list
) {
1411 list_del(&data
->list
);
1418 int hci_add_remote_oob_data(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8
*hash
,
1421 struct oob_data
*data
;
1423 data
= hci_find_remote_oob_data(hdev
, bdaddr
);
1426 data
= kmalloc(sizeof(*data
), GFP_ATOMIC
);
1430 bacpy(&data
->bdaddr
, bdaddr
);
1431 list_add(&data
->list
, &hdev
->remote_oob_data
);
1434 memcpy(data
->hash
, hash
, sizeof(data
->hash
));
1435 memcpy(data
->randomizer
, randomizer
, sizeof(data
->randomizer
));
1437 BT_DBG("%s for %s", hdev
->name
, batostr(bdaddr
));
1442 struct bdaddr_list
*hci_blacklist_lookup(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
)
1444 struct bdaddr_list
*b
;
1446 list_for_each_entry(b
, &hdev
->blacklist
, list
)
1447 if (bacmp(bdaddr
, &b
->bdaddr
) == 0)
1453 int hci_blacklist_clear(struct hci_dev
*hdev
)
1455 struct list_head
*p
, *n
;
1457 list_for_each_safe(p
, n
, &hdev
->blacklist
) {
1458 struct bdaddr_list
*b
;
1460 b
= list_entry(p
, struct bdaddr_list
, list
);
1469 int hci_blacklist_add(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 type
)
1471 struct bdaddr_list
*entry
;
1473 if (bacmp(bdaddr
, BDADDR_ANY
) == 0)
1476 if (hci_blacklist_lookup(hdev
, bdaddr
))
1479 entry
= kzalloc(sizeof(struct bdaddr_list
), GFP_KERNEL
);
1483 bacpy(&entry
->bdaddr
, bdaddr
);
1485 list_add(&entry
->list
, &hdev
->blacklist
);
1487 return mgmt_device_blocked(hdev
, bdaddr
, type
);
1490 int hci_blacklist_del(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 type
)
1492 struct bdaddr_list
*entry
;
1494 if (bacmp(bdaddr
, BDADDR_ANY
) == 0)
1495 return hci_blacklist_clear(hdev
);
1497 entry
= hci_blacklist_lookup(hdev
, bdaddr
);
1501 list_del(&entry
->list
);
1504 return mgmt_device_unblocked(hdev
, bdaddr
, type
);
1507 static void le_scan_param_req(struct hci_dev
*hdev
, unsigned long opt
)
1509 struct le_scan_params
*param
= (struct le_scan_params
*) opt
;
1510 struct hci_cp_le_set_scan_param cp
;
1512 memset(&cp
, 0, sizeof(cp
));
1513 cp
.type
= param
->type
;
1514 cp
.interval
= cpu_to_le16(param
->interval
);
1515 cp
.window
= cpu_to_le16(param
->window
);
1517 hci_send_cmd(hdev
, HCI_OP_LE_SET_SCAN_PARAM
, sizeof(cp
), &cp
);
1520 static void le_scan_enable_req(struct hci_dev
*hdev
, unsigned long opt
)
1522 struct hci_cp_le_set_scan_enable cp
;
1524 memset(&cp
, 0, sizeof(cp
));
1528 hci_send_cmd(hdev
, HCI_OP_LE_SET_SCAN_ENABLE
, sizeof(cp
), &cp
);
1531 static int hci_do_le_scan(struct hci_dev
*hdev
, u8 type
, u16 interval
,
1532 u16 window
, int timeout
)
1534 long timeo
= msecs_to_jiffies(3000);
1535 struct le_scan_params param
;
1538 BT_DBG("%s", hdev
->name
);
1540 if (test_bit(HCI_LE_SCAN
, &hdev
->dev_flags
))
1541 return -EINPROGRESS
;
1544 param
.interval
= interval
;
1545 param
.window
= window
;
1549 err
= __hci_request(hdev
, le_scan_param_req
, (unsigned long) ¶m
,
1552 err
= __hci_request(hdev
, le_scan_enable_req
, 0, timeo
);
1554 hci_req_unlock(hdev
);
1559 schedule_delayed_work(&hdev
->le_scan_disable
,
1560 msecs_to_jiffies(timeout
));
1565 int hci_cancel_le_scan(struct hci_dev
*hdev
)
1567 BT_DBG("%s", hdev
->name
);
1569 if (!test_bit(HCI_LE_SCAN
, &hdev
->dev_flags
))
1572 if (cancel_delayed_work(&hdev
->le_scan_disable
)) {
1573 struct hci_cp_le_set_scan_enable cp
;
1575 /* Send HCI command to disable LE Scan */
1576 memset(&cp
, 0, sizeof(cp
));
1577 hci_send_cmd(hdev
, HCI_OP_LE_SET_SCAN_ENABLE
, sizeof(cp
), &cp
);
1583 static void le_scan_disable_work(struct work_struct
*work
)
1585 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
,
1586 le_scan_disable
.work
);
1587 struct hci_cp_le_set_scan_enable cp
;
1589 BT_DBG("%s", hdev
->name
);
1591 memset(&cp
, 0, sizeof(cp
));
1593 hci_send_cmd(hdev
, HCI_OP_LE_SET_SCAN_ENABLE
, sizeof(cp
), &cp
);
1596 static void le_scan_work(struct work_struct
*work
)
1598 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, le_scan
);
1599 struct le_scan_params
*param
= &hdev
->le_scan_params
;
1601 BT_DBG("%s", hdev
->name
);
1603 hci_do_le_scan(hdev
, param
->type
, param
->interval
, param
->window
,
1607 int hci_le_scan(struct hci_dev
*hdev
, u8 type
, u16 interval
, u16 window
,
1610 struct le_scan_params
*param
= &hdev
->le_scan_params
;
1612 BT_DBG("%s", hdev
->name
);
1614 if (work_busy(&hdev
->le_scan
))
1615 return -EINPROGRESS
;
1618 param
->interval
= interval
;
1619 param
->window
= window
;
1620 param
->timeout
= timeout
;
1622 queue_work(system_long_wq
, &hdev
->le_scan
);
1627 /* Alloc HCI device */
1628 struct hci_dev
*hci_alloc_dev(void)
1630 struct hci_dev
*hdev
;
1632 hdev
= kzalloc(sizeof(struct hci_dev
), GFP_KERNEL
);
1636 hdev
->pkt_type
= (HCI_DM1
| HCI_DH1
| HCI_HV1
);
1637 hdev
->esco_type
= (ESCO_HV1
);
1638 hdev
->link_mode
= (HCI_LM_ACCEPT
);
1639 hdev
->io_capability
= 0x03; /* No Input No Output */
1641 hdev
->sniff_max_interval
= 800;
1642 hdev
->sniff_min_interval
= 80;
1644 mutex_init(&hdev
->lock
);
1645 mutex_init(&hdev
->req_lock
);
1647 INIT_LIST_HEAD(&hdev
->mgmt_pending
);
1648 INIT_LIST_HEAD(&hdev
->blacklist
);
1649 INIT_LIST_HEAD(&hdev
->uuids
);
1650 INIT_LIST_HEAD(&hdev
->link_keys
);
1651 INIT_LIST_HEAD(&hdev
->long_term_keys
);
1652 INIT_LIST_HEAD(&hdev
->remote_oob_data
);
1654 INIT_WORK(&hdev
->rx_work
, hci_rx_work
);
1655 INIT_WORK(&hdev
->cmd_work
, hci_cmd_work
);
1656 INIT_WORK(&hdev
->tx_work
, hci_tx_work
);
1657 INIT_WORK(&hdev
->power_on
, hci_power_on
);
1658 INIT_WORK(&hdev
->le_scan
, le_scan_work
);
1660 INIT_DELAYED_WORK(&hdev
->power_off
, hci_power_off
);
1661 INIT_DELAYED_WORK(&hdev
->discov_off
, hci_discov_off
);
1662 INIT_DELAYED_WORK(&hdev
->le_scan_disable
, le_scan_disable_work
);
1664 skb_queue_head_init(&hdev
->driver_init
);
1665 skb_queue_head_init(&hdev
->rx_q
);
1666 skb_queue_head_init(&hdev
->cmd_q
);
1667 skb_queue_head_init(&hdev
->raw_q
);
1669 init_waitqueue_head(&hdev
->req_wait_q
);
1671 setup_timer(&hdev
->cmd_timer
, hci_cmd_timeout
, (unsigned long) hdev
);
1673 hci_init_sysfs(hdev
);
1674 discovery_init(hdev
);
1675 hci_conn_hash_init(hdev
);
1679 EXPORT_SYMBOL(hci_alloc_dev
);
1681 /* Free HCI device */
1682 void hci_free_dev(struct hci_dev
*hdev
)
1684 skb_queue_purge(&hdev
->driver_init
);
1686 /* will free via device release */
1687 put_device(&hdev
->dev
);
1689 EXPORT_SYMBOL(hci_free_dev
);
1691 /* Register HCI device */
1692 int hci_register_dev(struct hci_dev
*hdev
)
1696 if (!hdev
->open
|| !hdev
->close
)
1699 /* Do not allow HCI_AMP devices to register at index 0,
1700 * so the index can be used as the AMP controller ID.
1702 switch (hdev
->dev_type
) {
1704 id
= ida_simple_get(&hci_index_ida
, 0, 0, GFP_KERNEL
);
1707 id
= ida_simple_get(&hci_index_ida
, 1, 0, GFP_KERNEL
);
1716 sprintf(hdev
->name
, "hci%d", id
);
1719 BT_DBG("%p name %s bus %d", hdev
, hdev
->name
, hdev
->bus
);
1721 write_lock(&hci_dev_list_lock
);
1722 list_add(&hdev
->list
, &hci_dev_list
);
1723 write_unlock(&hci_dev_list_lock
);
1725 hdev
->workqueue
= alloc_workqueue(hdev
->name
, WQ_HIGHPRI
| WQ_UNBOUND
|
1727 if (!hdev
->workqueue
) {
1732 error
= hci_add_sysfs(hdev
);
1736 hdev
->rfkill
= rfkill_alloc(hdev
->name
, &hdev
->dev
,
1737 RFKILL_TYPE_BLUETOOTH
, &hci_rfkill_ops
,
1740 if (rfkill_register(hdev
->rfkill
) < 0) {
1741 rfkill_destroy(hdev
->rfkill
);
1742 hdev
->rfkill
= NULL
;
1746 set_bit(HCI_SETUP
, &hdev
->dev_flags
);
1748 if (hdev
->dev_type
!= HCI_AMP
)
1749 set_bit(HCI_AUTO_OFF
, &hdev
->dev_flags
);
1751 schedule_work(&hdev
->power_on
);
1753 hci_notify(hdev
, HCI_DEV_REG
);
1759 destroy_workqueue(hdev
->workqueue
);
1761 ida_simple_remove(&hci_index_ida
, hdev
->id
);
1762 write_lock(&hci_dev_list_lock
);
1763 list_del(&hdev
->list
);
1764 write_unlock(&hci_dev_list_lock
);
1768 EXPORT_SYMBOL(hci_register_dev
);
1770 /* Unregister HCI device */
1771 void hci_unregister_dev(struct hci_dev
*hdev
)
1775 BT_DBG("%p name %s bus %d", hdev
, hdev
->name
, hdev
->bus
);
1777 set_bit(HCI_UNREGISTER
, &hdev
->dev_flags
);
1781 write_lock(&hci_dev_list_lock
);
1782 list_del(&hdev
->list
);
1783 write_unlock(&hci_dev_list_lock
);
1785 hci_dev_do_close(hdev
);
1787 for (i
= 0; i
< NUM_REASSEMBLY
; i
++)
1788 kfree_skb(hdev
->reassembly
[i
]);
1790 if (!test_bit(HCI_INIT
, &hdev
->flags
) &&
1791 !test_bit(HCI_SETUP
, &hdev
->dev_flags
)) {
1793 mgmt_index_removed(hdev
);
1794 hci_dev_unlock(hdev
);
1797 /* mgmt_index_removed should take care of emptying the
1799 BUG_ON(!list_empty(&hdev
->mgmt_pending
));
1801 hci_notify(hdev
, HCI_DEV_UNREG
);
1804 rfkill_unregister(hdev
->rfkill
);
1805 rfkill_destroy(hdev
->rfkill
);
1808 hci_del_sysfs(hdev
);
1810 destroy_workqueue(hdev
->workqueue
);
1813 hci_blacklist_clear(hdev
);
1814 hci_uuids_clear(hdev
);
1815 hci_link_keys_clear(hdev
);
1816 hci_smp_ltks_clear(hdev
);
1817 hci_remote_oob_data_clear(hdev
);
1818 hci_dev_unlock(hdev
);
1822 ida_simple_remove(&hci_index_ida
, id
);
1824 EXPORT_SYMBOL(hci_unregister_dev
);
1826 /* Suspend HCI device */
1827 int hci_suspend_dev(struct hci_dev
*hdev
)
1829 hci_notify(hdev
, HCI_DEV_SUSPEND
);
1832 EXPORT_SYMBOL(hci_suspend_dev
);
1834 /* Resume HCI device */
1835 int hci_resume_dev(struct hci_dev
*hdev
)
1837 hci_notify(hdev
, HCI_DEV_RESUME
);
1840 EXPORT_SYMBOL(hci_resume_dev
);
1842 /* Receive frame from HCI drivers */
1843 int hci_recv_frame(struct sk_buff
*skb
)
1845 struct hci_dev
*hdev
= (struct hci_dev
*) skb
->dev
;
1846 if (!hdev
|| (!test_bit(HCI_UP
, &hdev
->flags
)
1847 && !test_bit(HCI_INIT
, &hdev
->flags
))) {
1853 bt_cb(skb
)->incoming
= 1;
1856 __net_timestamp(skb
);
1858 skb_queue_tail(&hdev
->rx_q
, skb
);
1859 queue_work(hdev
->workqueue
, &hdev
->rx_work
);
1863 EXPORT_SYMBOL(hci_recv_frame
);
1865 static int hci_reassembly(struct hci_dev
*hdev
, int type
, void *data
,
1866 int count
, __u8 index
)
1871 struct sk_buff
*skb
;
1872 struct bt_skb_cb
*scb
;
1874 if ((type
< HCI_ACLDATA_PKT
|| type
> HCI_EVENT_PKT
) ||
1875 index
>= NUM_REASSEMBLY
)
1878 skb
= hdev
->reassembly
[index
];
1882 case HCI_ACLDATA_PKT
:
1883 len
= HCI_MAX_FRAME_SIZE
;
1884 hlen
= HCI_ACL_HDR_SIZE
;
1887 len
= HCI_MAX_EVENT_SIZE
;
1888 hlen
= HCI_EVENT_HDR_SIZE
;
1890 case HCI_SCODATA_PKT
:
1891 len
= HCI_MAX_SCO_SIZE
;
1892 hlen
= HCI_SCO_HDR_SIZE
;
1896 skb
= bt_skb_alloc(len
, GFP_ATOMIC
);
1900 scb
= (void *) skb
->cb
;
1902 scb
->pkt_type
= type
;
1904 skb
->dev
= (void *) hdev
;
1905 hdev
->reassembly
[index
] = skb
;
1909 scb
= (void *) skb
->cb
;
1910 len
= min_t(uint
, scb
->expect
, count
);
1912 memcpy(skb_put(skb
, len
), data
, len
);
1921 if (skb
->len
== HCI_EVENT_HDR_SIZE
) {
1922 struct hci_event_hdr
*h
= hci_event_hdr(skb
);
1923 scb
->expect
= h
->plen
;
1925 if (skb_tailroom(skb
) < scb
->expect
) {
1927 hdev
->reassembly
[index
] = NULL
;
1933 case HCI_ACLDATA_PKT
:
1934 if (skb
->len
== HCI_ACL_HDR_SIZE
) {
1935 struct hci_acl_hdr
*h
= hci_acl_hdr(skb
);
1936 scb
->expect
= __le16_to_cpu(h
->dlen
);
1938 if (skb_tailroom(skb
) < scb
->expect
) {
1940 hdev
->reassembly
[index
] = NULL
;
1946 case HCI_SCODATA_PKT
:
1947 if (skb
->len
== HCI_SCO_HDR_SIZE
) {
1948 struct hci_sco_hdr
*h
= hci_sco_hdr(skb
);
1949 scb
->expect
= h
->dlen
;
1951 if (skb_tailroom(skb
) < scb
->expect
) {
1953 hdev
->reassembly
[index
] = NULL
;
1960 if (scb
->expect
== 0) {
1961 /* Complete frame */
1963 bt_cb(skb
)->pkt_type
= type
;
1964 hci_recv_frame(skb
);
1966 hdev
->reassembly
[index
] = NULL
;
1974 int hci_recv_fragment(struct hci_dev
*hdev
, int type
, void *data
, int count
)
1978 if (type
< HCI_ACLDATA_PKT
|| type
> HCI_EVENT_PKT
)
1982 rem
= hci_reassembly(hdev
, type
, data
, count
, type
- 1);
1986 data
+= (count
- rem
);
1992 EXPORT_SYMBOL(hci_recv_fragment
);
1994 #define STREAM_REASSEMBLY 0
1996 int hci_recv_stream_fragment(struct hci_dev
*hdev
, void *data
, int count
)
2002 struct sk_buff
*skb
= hdev
->reassembly
[STREAM_REASSEMBLY
];
2005 struct { char type
; } *pkt
;
2007 /* Start of the frame */
2014 type
= bt_cb(skb
)->pkt_type
;
2016 rem
= hci_reassembly(hdev
, type
, data
, count
,
2021 data
+= (count
- rem
);
2027 EXPORT_SYMBOL(hci_recv_stream_fragment
);
2029 /* ---- Interface to upper protocols ---- */
2031 int hci_register_cb(struct hci_cb
*cb
)
2033 BT_DBG("%p name %s", cb
, cb
->name
);
2035 write_lock(&hci_cb_list_lock
);
2036 list_add(&cb
->list
, &hci_cb_list
);
2037 write_unlock(&hci_cb_list_lock
);
2041 EXPORT_SYMBOL(hci_register_cb
);
2043 int hci_unregister_cb(struct hci_cb
*cb
)
2045 BT_DBG("%p name %s", cb
, cb
->name
);
2047 write_lock(&hci_cb_list_lock
);
2048 list_del(&cb
->list
);
2049 write_unlock(&hci_cb_list_lock
);
2053 EXPORT_SYMBOL(hci_unregister_cb
);
2055 static int hci_send_frame(struct sk_buff
*skb
)
2057 struct hci_dev
*hdev
= (struct hci_dev
*) skb
->dev
;
2064 BT_DBG("%s type %d len %d", hdev
->name
, bt_cb(skb
)->pkt_type
, skb
->len
);
2067 __net_timestamp(skb
);
2069 /* Send copy to monitor */
2070 hci_send_to_monitor(hdev
, skb
);
2072 if (atomic_read(&hdev
->promisc
)) {
2073 /* Send copy to the sockets */
2074 hci_send_to_sock(hdev
, skb
);
2077 /* Get rid of skb owner, prior to sending to the driver. */
2080 return hdev
->send(skb
);
2083 /* Send HCI command */
2084 int hci_send_cmd(struct hci_dev
*hdev
, __u16 opcode
, __u32 plen
, void *param
)
2086 int len
= HCI_COMMAND_HDR_SIZE
+ plen
;
2087 struct hci_command_hdr
*hdr
;
2088 struct sk_buff
*skb
;
2090 BT_DBG("%s opcode 0x%4.4x plen %d", hdev
->name
, opcode
, plen
);
2092 skb
= bt_skb_alloc(len
, GFP_ATOMIC
);
2094 BT_ERR("%s no memory for command", hdev
->name
);
2098 hdr
= (struct hci_command_hdr
*) skb_put(skb
, HCI_COMMAND_HDR_SIZE
);
2099 hdr
->opcode
= cpu_to_le16(opcode
);
2103 memcpy(skb_put(skb
, plen
), param
, plen
);
2105 BT_DBG("skb len %d", skb
->len
);
2107 bt_cb(skb
)->pkt_type
= HCI_COMMAND_PKT
;
2108 skb
->dev
= (void *) hdev
;
2110 if (test_bit(HCI_INIT
, &hdev
->flags
))
2111 hdev
->init_last_cmd
= opcode
;
2113 skb_queue_tail(&hdev
->cmd_q
, skb
);
2114 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
2119 /* Get data from the previously sent command */
2120 void *hci_sent_cmd_data(struct hci_dev
*hdev
, __u16 opcode
)
2122 struct hci_command_hdr
*hdr
;
2124 if (!hdev
->sent_cmd
)
2127 hdr
= (void *) hdev
->sent_cmd
->data
;
2129 if (hdr
->opcode
!= cpu_to_le16(opcode
))
2132 BT_DBG("%s opcode 0x%4.4x", hdev
->name
, opcode
);
2134 return hdev
->sent_cmd
->data
+ HCI_COMMAND_HDR_SIZE
;
2138 static void hci_add_acl_hdr(struct sk_buff
*skb
, __u16 handle
, __u16 flags
)
2140 struct hci_acl_hdr
*hdr
;
2143 skb_push(skb
, HCI_ACL_HDR_SIZE
);
2144 skb_reset_transport_header(skb
);
2145 hdr
= (struct hci_acl_hdr
*)skb_transport_header(skb
);
2146 hdr
->handle
= cpu_to_le16(hci_handle_pack(handle
, flags
));
2147 hdr
->dlen
= cpu_to_le16(len
);
2150 static void hci_queue_acl(struct hci_conn
*conn
, struct sk_buff_head
*queue
,
2151 struct sk_buff
*skb
, __u16 flags
)
2153 struct hci_dev
*hdev
= conn
->hdev
;
2154 struct sk_buff
*list
;
2156 skb
->len
= skb_headlen(skb
);
2159 bt_cb(skb
)->pkt_type
= HCI_ACLDATA_PKT
;
2160 hci_add_acl_hdr(skb
, conn
->handle
, flags
);
2162 list
= skb_shinfo(skb
)->frag_list
;
2164 /* Non fragmented */
2165 BT_DBG("%s nonfrag skb %p len %d", hdev
->name
, skb
, skb
->len
);
2167 skb_queue_tail(queue
, skb
);
2170 BT_DBG("%s frag %p len %d", hdev
->name
, skb
, skb
->len
);
2172 skb_shinfo(skb
)->frag_list
= NULL
;
2174 /* Queue all fragments atomically */
2175 spin_lock(&queue
->lock
);
2177 __skb_queue_tail(queue
, skb
);
2179 flags
&= ~ACL_START
;
2182 skb
= list
; list
= list
->next
;
2184 skb
->dev
= (void *) hdev
;
2185 bt_cb(skb
)->pkt_type
= HCI_ACLDATA_PKT
;
2186 hci_add_acl_hdr(skb
, conn
->handle
, flags
);
2188 BT_DBG("%s frag %p len %d", hdev
->name
, skb
, skb
->len
);
2190 __skb_queue_tail(queue
, skb
);
2193 spin_unlock(&queue
->lock
);
2197 void hci_send_acl(struct hci_chan
*chan
, struct sk_buff
*skb
, __u16 flags
)
2199 struct hci_conn
*conn
= chan
->conn
;
2200 struct hci_dev
*hdev
= conn
->hdev
;
2202 BT_DBG("%s chan %p flags 0x%4.4x", hdev
->name
, chan
, flags
);
2204 skb
->dev
= (void *) hdev
;
2206 hci_queue_acl(conn
, &chan
->data_q
, skb
, flags
);
2208 queue_work(hdev
->workqueue
, &hdev
->tx_work
);
2212 void hci_send_sco(struct hci_conn
*conn
, struct sk_buff
*skb
)
2214 struct hci_dev
*hdev
= conn
->hdev
;
2215 struct hci_sco_hdr hdr
;
2217 BT_DBG("%s len %d", hdev
->name
, skb
->len
);
2219 hdr
.handle
= cpu_to_le16(conn
->handle
);
2220 hdr
.dlen
= skb
->len
;
2222 skb_push(skb
, HCI_SCO_HDR_SIZE
);
2223 skb_reset_transport_header(skb
);
2224 memcpy(skb_transport_header(skb
), &hdr
, HCI_SCO_HDR_SIZE
);
2226 skb
->dev
= (void *) hdev
;
2227 bt_cb(skb
)->pkt_type
= HCI_SCODATA_PKT
;
2229 skb_queue_tail(&conn
->data_q
, skb
);
2230 queue_work(hdev
->workqueue
, &hdev
->tx_work
);
2233 /* ---- HCI TX task (outgoing data) ---- */
2235 /* HCI Connection scheduler */
2236 static struct hci_conn
*hci_low_sent(struct hci_dev
*hdev
, __u8 type
,
2239 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
2240 struct hci_conn
*conn
= NULL
, *c
;
2241 unsigned int num
= 0, min
= ~0;
2243 /* We don't have to lock device here. Connections are always
2244 * added and removed with TX task disabled. */
2248 list_for_each_entry_rcu(c
, &h
->list
, list
) {
2249 if (c
->type
!= type
|| skb_queue_empty(&c
->data_q
))
2252 if (c
->state
!= BT_CONNECTED
&& c
->state
!= BT_CONFIG
)
2257 if (c
->sent
< min
) {
2262 if (hci_conn_num(hdev
, type
) == num
)
2271 switch (conn
->type
) {
2273 cnt
= hdev
->acl_cnt
;
2277 cnt
= hdev
->sco_cnt
;
2280 cnt
= hdev
->le_mtu
? hdev
->le_cnt
: hdev
->acl_cnt
;
2284 BT_ERR("Unknown link type");
2292 BT_DBG("conn %p quote %d", conn
, *quote
);
2296 static void hci_link_tx_to(struct hci_dev
*hdev
, __u8 type
)
2298 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
2301 BT_ERR("%s link tx timeout", hdev
->name
);
2305 /* Kill stalled connections */
2306 list_for_each_entry_rcu(c
, &h
->list
, list
) {
2307 if (c
->type
== type
&& c
->sent
) {
2308 BT_ERR("%s killing stalled connection %s",
2309 hdev
->name
, batostr(&c
->dst
));
2310 hci_acl_disconn(c
, HCI_ERROR_REMOTE_USER_TERM
);
2317 static struct hci_chan
*hci_chan_sent(struct hci_dev
*hdev
, __u8 type
,
2320 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
2321 struct hci_chan
*chan
= NULL
;
2322 unsigned int num
= 0, min
= ~0, cur_prio
= 0;
2323 struct hci_conn
*conn
;
2324 int cnt
, q
, conn_num
= 0;
2326 BT_DBG("%s", hdev
->name
);
2330 list_for_each_entry_rcu(conn
, &h
->list
, list
) {
2331 struct hci_chan
*tmp
;
2333 if (conn
->type
!= type
)
2336 if (conn
->state
!= BT_CONNECTED
&& conn
->state
!= BT_CONFIG
)
2341 list_for_each_entry_rcu(tmp
, &conn
->chan_list
, list
) {
2342 struct sk_buff
*skb
;
2344 if (skb_queue_empty(&tmp
->data_q
))
2347 skb
= skb_peek(&tmp
->data_q
);
2348 if (skb
->priority
< cur_prio
)
2351 if (skb
->priority
> cur_prio
) {
2354 cur_prio
= skb
->priority
;
2359 if (conn
->sent
< min
) {
2365 if (hci_conn_num(hdev
, type
) == conn_num
)
2374 switch (chan
->conn
->type
) {
2376 cnt
= hdev
->acl_cnt
;
2380 cnt
= hdev
->sco_cnt
;
2383 cnt
= hdev
->le_mtu
? hdev
->le_cnt
: hdev
->acl_cnt
;
2387 BT_ERR("Unknown link type");
2392 BT_DBG("chan %p quote %d", chan
, *quote
);
2396 static void hci_prio_recalculate(struct hci_dev
*hdev
, __u8 type
)
2398 struct hci_conn_hash
*h
= &hdev
->conn_hash
;
2399 struct hci_conn
*conn
;
2402 BT_DBG("%s", hdev
->name
);
2406 list_for_each_entry_rcu(conn
, &h
->list
, list
) {
2407 struct hci_chan
*chan
;
2409 if (conn
->type
!= type
)
2412 if (conn
->state
!= BT_CONNECTED
&& conn
->state
!= BT_CONFIG
)
2417 list_for_each_entry_rcu(chan
, &conn
->chan_list
, list
) {
2418 struct sk_buff
*skb
;
2425 if (skb_queue_empty(&chan
->data_q
))
2428 skb
= skb_peek(&chan
->data_q
);
2429 if (skb
->priority
>= HCI_PRIO_MAX
- 1)
2432 skb
->priority
= HCI_PRIO_MAX
- 1;
2434 BT_DBG("chan %p skb %p promoted to %d", chan
, skb
,
2438 if (hci_conn_num(hdev
, type
) == num
)
2446 static inline int __get_blocks(struct hci_dev
*hdev
, struct sk_buff
*skb
)
2448 /* Calculate count of blocks used by this packet */
2449 return DIV_ROUND_UP(skb
->len
- HCI_ACL_HDR_SIZE
, hdev
->block_len
);
2452 static void __check_timeout(struct hci_dev
*hdev
, unsigned int cnt
)
2454 if (!test_bit(HCI_RAW
, &hdev
->flags
)) {
2455 /* ACL tx timeout must be longer than maximum
2456 * link supervision timeout (40.9 seconds) */
2457 if (!cnt
&& time_after(jiffies
, hdev
->acl_last_tx
+
2458 HCI_ACL_TX_TIMEOUT
))
2459 hci_link_tx_to(hdev
, ACL_LINK
);
2463 static void hci_sched_acl_pkt(struct hci_dev
*hdev
)
2465 unsigned int cnt
= hdev
->acl_cnt
;
2466 struct hci_chan
*chan
;
2467 struct sk_buff
*skb
;
2470 __check_timeout(hdev
, cnt
);
2472 while (hdev
->acl_cnt
&&
2473 (chan
= hci_chan_sent(hdev
, ACL_LINK
, "e
))) {
2474 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
2475 while (quote
-- && (skb
= skb_peek(&chan
->data_q
))) {
2476 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
2477 skb
->len
, skb
->priority
);
2479 /* Stop if priority has changed */
2480 if (skb
->priority
< priority
)
2483 skb
= skb_dequeue(&chan
->data_q
);
2485 hci_conn_enter_active_mode(chan
->conn
,
2486 bt_cb(skb
)->force_active
);
2488 hci_send_frame(skb
);
2489 hdev
->acl_last_tx
= jiffies
;
2497 if (cnt
!= hdev
->acl_cnt
)
2498 hci_prio_recalculate(hdev
, ACL_LINK
);
2501 static void hci_sched_acl_blk(struct hci_dev
*hdev
)
2503 unsigned int cnt
= hdev
->block_cnt
;
2504 struct hci_chan
*chan
;
2505 struct sk_buff
*skb
;
2508 __check_timeout(hdev
, cnt
);
2510 while (hdev
->block_cnt
> 0 &&
2511 (chan
= hci_chan_sent(hdev
, ACL_LINK
, "e
))) {
2512 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
2513 while (quote
> 0 && (skb
= skb_peek(&chan
->data_q
))) {
2516 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
2517 skb
->len
, skb
->priority
);
2519 /* Stop if priority has changed */
2520 if (skb
->priority
< priority
)
2523 skb
= skb_dequeue(&chan
->data_q
);
2525 blocks
= __get_blocks(hdev
, skb
);
2526 if (blocks
> hdev
->block_cnt
)
2529 hci_conn_enter_active_mode(chan
->conn
,
2530 bt_cb(skb
)->force_active
);
2532 hci_send_frame(skb
);
2533 hdev
->acl_last_tx
= jiffies
;
2535 hdev
->block_cnt
-= blocks
;
2538 chan
->sent
+= blocks
;
2539 chan
->conn
->sent
+= blocks
;
2543 if (cnt
!= hdev
->block_cnt
)
2544 hci_prio_recalculate(hdev
, ACL_LINK
);
2547 static void hci_sched_acl(struct hci_dev
*hdev
)
2549 BT_DBG("%s", hdev
->name
);
2551 if (!hci_conn_num(hdev
, ACL_LINK
))
2554 switch (hdev
->flow_ctl_mode
) {
2555 case HCI_FLOW_CTL_MODE_PACKET_BASED
:
2556 hci_sched_acl_pkt(hdev
);
2559 case HCI_FLOW_CTL_MODE_BLOCK_BASED
:
2560 hci_sched_acl_blk(hdev
);
2566 static void hci_sched_sco(struct hci_dev
*hdev
)
2568 struct hci_conn
*conn
;
2569 struct sk_buff
*skb
;
2572 BT_DBG("%s", hdev
->name
);
2574 if (!hci_conn_num(hdev
, SCO_LINK
))
2577 while (hdev
->sco_cnt
&& (conn
= hci_low_sent(hdev
, SCO_LINK
, "e
))) {
2578 while (quote
-- && (skb
= skb_dequeue(&conn
->data_q
))) {
2579 BT_DBG("skb %p len %d", skb
, skb
->len
);
2580 hci_send_frame(skb
);
2583 if (conn
->sent
== ~0)
2589 static void hci_sched_esco(struct hci_dev
*hdev
)
2591 struct hci_conn
*conn
;
2592 struct sk_buff
*skb
;
2595 BT_DBG("%s", hdev
->name
);
2597 if (!hci_conn_num(hdev
, ESCO_LINK
))
2600 while (hdev
->sco_cnt
&& (conn
= hci_low_sent(hdev
, ESCO_LINK
,
2602 while (quote
-- && (skb
= skb_dequeue(&conn
->data_q
))) {
2603 BT_DBG("skb %p len %d", skb
, skb
->len
);
2604 hci_send_frame(skb
);
2607 if (conn
->sent
== ~0)
2613 static void hci_sched_le(struct hci_dev
*hdev
)
2615 struct hci_chan
*chan
;
2616 struct sk_buff
*skb
;
2617 int quote
, cnt
, tmp
;
2619 BT_DBG("%s", hdev
->name
);
2621 if (!hci_conn_num(hdev
, LE_LINK
))
2624 if (!test_bit(HCI_RAW
, &hdev
->flags
)) {
2625 /* LE tx timeout must be longer than maximum
2626 * link supervision timeout (40.9 seconds) */
2627 if (!hdev
->le_cnt
&& hdev
->le_pkts
&&
2628 time_after(jiffies
, hdev
->le_last_tx
+ HZ
* 45))
2629 hci_link_tx_to(hdev
, LE_LINK
);
2632 cnt
= hdev
->le_pkts
? hdev
->le_cnt
: hdev
->acl_cnt
;
2634 while (cnt
&& (chan
= hci_chan_sent(hdev
, LE_LINK
, "e
))) {
2635 u32 priority
= (skb_peek(&chan
->data_q
))->priority
;
2636 while (quote
-- && (skb
= skb_peek(&chan
->data_q
))) {
2637 BT_DBG("chan %p skb %p len %d priority %u", chan
, skb
,
2638 skb
->len
, skb
->priority
);
2640 /* Stop if priority has changed */
2641 if (skb
->priority
< priority
)
2644 skb
= skb_dequeue(&chan
->data_q
);
2646 hci_send_frame(skb
);
2647 hdev
->le_last_tx
= jiffies
;
2658 hdev
->acl_cnt
= cnt
;
2661 hci_prio_recalculate(hdev
, LE_LINK
);
2664 static void hci_tx_work(struct work_struct
*work
)
2666 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, tx_work
);
2667 struct sk_buff
*skb
;
2669 BT_DBG("%s acl %d sco %d le %d", hdev
->name
, hdev
->acl_cnt
,
2670 hdev
->sco_cnt
, hdev
->le_cnt
);
2672 /* Schedule queues and send stuff to HCI driver */
2674 hci_sched_acl(hdev
);
2676 hci_sched_sco(hdev
);
2678 hci_sched_esco(hdev
);
2682 /* Send next queued raw (unknown type) packet */
2683 while ((skb
= skb_dequeue(&hdev
->raw_q
)))
2684 hci_send_frame(skb
);
2687 /* ----- HCI RX task (incoming data processing) ----- */
2689 /* ACL data packet */
2690 static void hci_acldata_packet(struct hci_dev
*hdev
, struct sk_buff
*skb
)
2692 struct hci_acl_hdr
*hdr
= (void *) skb
->data
;
2693 struct hci_conn
*conn
;
2694 __u16 handle
, flags
;
2696 skb_pull(skb
, HCI_ACL_HDR_SIZE
);
2698 handle
= __le16_to_cpu(hdr
->handle
);
2699 flags
= hci_flags(handle
);
2700 handle
= hci_handle(handle
);
2702 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev
->name
, skb
->len
,
2705 hdev
->stat
.acl_rx
++;
2708 conn
= hci_conn_hash_lookup_handle(hdev
, handle
);
2709 hci_dev_unlock(hdev
);
2712 hci_conn_enter_active_mode(conn
, BT_POWER_FORCE_ACTIVE_OFF
);
2715 if (test_bit(HCI_MGMT
, &hdev
->dev_flags
) &&
2716 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED
, &conn
->flags
))
2717 mgmt_device_connected(hdev
, &conn
->dst
, conn
->type
,
2718 conn
->dst_type
, 0, NULL
, 0,
2720 hci_dev_unlock(hdev
);
2722 /* Send to upper protocol */
2723 l2cap_recv_acldata(conn
, skb
, flags
);
2726 BT_ERR("%s ACL packet for unknown connection handle %d",
2727 hdev
->name
, handle
);
2733 /* SCO data packet */
2734 static void hci_scodata_packet(struct hci_dev
*hdev
, struct sk_buff
*skb
)
2736 struct hci_sco_hdr
*hdr
= (void *) skb
->data
;
2737 struct hci_conn
*conn
;
2740 skb_pull(skb
, HCI_SCO_HDR_SIZE
);
2742 handle
= __le16_to_cpu(hdr
->handle
);
2744 BT_DBG("%s len %d handle 0x%4.4x", hdev
->name
, skb
->len
, handle
);
2746 hdev
->stat
.sco_rx
++;
2749 conn
= hci_conn_hash_lookup_handle(hdev
, handle
);
2750 hci_dev_unlock(hdev
);
2753 /* Send to upper protocol */
2754 sco_recv_scodata(conn
, skb
);
2757 BT_ERR("%s SCO packet for unknown connection handle %d",
2758 hdev
->name
, handle
);
2764 static void hci_rx_work(struct work_struct
*work
)
2766 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, rx_work
);
2767 struct sk_buff
*skb
;
2769 BT_DBG("%s", hdev
->name
);
2771 while ((skb
= skb_dequeue(&hdev
->rx_q
))) {
2772 /* Send copy to monitor */
2773 hci_send_to_monitor(hdev
, skb
);
2775 if (atomic_read(&hdev
->promisc
)) {
2776 /* Send copy to the sockets */
2777 hci_send_to_sock(hdev
, skb
);
2780 if (test_bit(HCI_RAW
, &hdev
->flags
)) {
2785 if (test_bit(HCI_INIT
, &hdev
->flags
)) {
2786 /* Don't process data packets in this states. */
2787 switch (bt_cb(skb
)->pkt_type
) {
2788 case HCI_ACLDATA_PKT
:
2789 case HCI_SCODATA_PKT
:
2796 switch (bt_cb(skb
)->pkt_type
) {
2798 BT_DBG("%s Event packet", hdev
->name
);
2799 hci_event_packet(hdev
, skb
);
2802 case HCI_ACLDATA_PKT
:
2803 BT_DBG("%s ACL data packet", hdev
->name
);
2804 hci_acldata_packet(hdev
, skb
);
2807 case HCI_SCODATA_PKT
:
2808 BT_DBG("%s SCO data packet", hdev
->name
);
2809 hci_scodata_packet(hdev
, skb
);
2819 static void hci_cmd_work(struct work_struct
*work
)
2821 struct hci_dev
*hdev
= container_of(work
, struct hci_dev
, cmd_work
);
2822 struct sk_buff
*skb
;
2824 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev
->name
,
2825 atomic_read(&hdev
->cmd_cnt
), skb_queue_len(&hdev
->cmd_q
));
2827 /* Send queued commands */
2828 if (atomic_read(&hdev
->cmd_cnt
)) {
2829 skb
= skb_dequeue(&hdev
->cmd_q
);
2833 kfree_skb(hdev
->sent_cmd
);
2835 hdev
->sent_cmd
= skb_clone(skb
, GFP_ATOMIC
);
2836 if (hdev
->sent_cmd
) {
2837 atomic_dec(&hdev
->cmd_cnt
);
2838 hci_send_frame(skb
);
2839 if (test_bit(HCI_RESET
, &hdev
->flags
))
2840 del_timer(&hdev
->cmd_timer
);
2842 mod_timer(&hdev
->cmd_timer
,
2843 jiffies
+ HCI_CMD_TIMEOUT
);
2845 skb_queue_head(&hdev
->cmd_q
, skb
);
2846 queue_work(hdev
->workqueue
, &hdev
->cmd_work
);
2851 int hci_do_inquiry(struct hci_dev
*hdev
, u8 length
)
2853 /* General inquiry access code (GIAC) */
2854 u8 lap
[3] = { 0x33, 0x8b, 0x9e };
2855 struct hci_cp_inquiry cp
;
2857 BT_DBG("%s", hdev
->name
);
2859 if (test_bit(HCI_INQUIRY
, &hdev
->flags
))
2860 return -EINPROGRESS
;
2862 inquiry_cache_flush(hdev
);
2864 memset(&cp
, 0, sizeof(cp
));
2865 memcpy(&cp
.lap
, lap
, sizeof(cp
.lap
));
2868 return hci_send_cmd(hdev
, HCI_OP_INQUIRY
, sizeof(cp
), &cp
);
2871 int hci_cancel_inquiry(struct hci_dev
*hdev
)
2873 BT_DBG("%s", hdev
->name
);
2875 if (!test_bit(HCI_INQUIRY
, &hdev
->flags
))
2878 return hci_send_cmd(hdev
, HCI_OP_INQUIRY_CANCEL
, 0, NULL
);
2881 u8
bdaddr_to_le(u8 bdaddr_type
)
2883 switch (bdaddr_type
) {
2884 case BDADDR_LE_PUBLIC
:
2885 return ADDR_LE_DEV_PUBLIC
;
2888 /* Fallback to LE Random address type */
2889 return ADDR_LE_DEV_RANDOM
;