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/jiffies.h>
29 #include <linux/module.h>
30 #include <linux/kmod.h>
32 #include <linux/types.h>
33 #include <linux/errno.h>
34 #include <linux/kernel.h>
35 #include <linux/sched.h>
36 #include <linux/slab.h>
37 #include <linux/poll.h>
38 #include <linux/fcntl.h>
39 #include <linux/init.h>
40 #include <linux/skbuff.h>
41 #include <linux/workqueue.h>
42 #include <linux/interrupt.h>
43 #include <linux/rfkill.h>
44 #include <linux/timer.h>
45 #include <linux/crypto.h>
48 #include <asm/system.h>
49 #include <linux/uaccess.h>
50 #include <asm/unaligned.h>
52 #include <net/bluetooth/bluetooth.h>
53 #include <net/bluetooth/hci_core.h>
55 #define AUTO_OFF_TIMEOUT 2000
57 static void hci_rx_work(struct work_struct *work);
58 static void hci_cmd_work(struct work_struct *work);
59 static void hci_tx_work(struct work_struct *work);
62 LIST_HEAD(hci_dev_list);
63 DEFINE_RWLOCK(hci_dev_list_lock);
65 /* HCI callback list */
66 LIST_HEAD(hci_cb_list);
67 DEFINE_RWLOCK(hci_cb_list_lock);
69 /* ---- HCI notifications ---- */
71 static void hci_notify(struct hci_dev *hdev, int event)
73 hci_sock_dev_event(hdev, event);
76 /* ---- HCI requests ---- */
78 void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
80 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
82 /* If this is the init phase check if the completed command matches
83 * the last init command, and if not just return.
85 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
86 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
89 /* Some CSR based controllers generate a spontaneous
90 * reset complete event during init and any pending
91 * command will never be completed. In such a case we
92 * need to resend whatever was the last sent
96 if (cmd != HCI_OP_RESET || sent->opcode == HCI_OP_RESET)
99 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
101 skb_queue_head(&hdev->cmd_q, skb);
102 queue_work(hdev->workqueue, &hdev->cmd_work);
108 if (hdev->req_status == HCI_REQ_PEND) {
109 hdev->req_result = result;
110 hdev->req_status = HCI_REQ_DONE;
111 wake_up_interruptible(&hdev->req_wait_q);
115 static void hci_req_cancel(struct hci_dev *hdev, int err)
117 BT_DBG("%s err 0x%2.2x", hdev->name, err);
119 if (hdev->req_status == HCI_REQ_PEND) {
120 hdev->req_result = err;
121 hdev->req_status = HCI_REQ_CANCELED;
122 wake_up_interruptible(&hdev->req_wait_q);
126 /* Execute request and wait for completion. */
127 static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
128 unsigned long opt, __u32 timeout)
130 DECLARE_WAITQUEUE(wait, current);
133 BT_DBG("%s start", hdev->name);
135 hdev->req_status = HCI_REQ_PEND;
137 add_wait_queue(&hdev->req_wait_q, &wait);
138 set_current_state(TASK_INTERRUPTIBLE);
141 schedule_timeout(timeout);
143 remove_wait_queue(&hdev->req_wait_q, &wait);
145 if (signal_pending(current))
148 switch (hdev->req_status) {
150 err = -bt_to_errno(hdev->req_result);
153 case HCI_REQ_CANCELED:
154 err = -hdev->req_result;
162 hdev->req_status = hdev->req_result = 0;
164 BT_DBG("%s end: err %d", hdev->name, err);
169 static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
170 unsigned long opt, __u32 timeout)
174 if (!test_bit(HCI_UP, &hdev->flags))
177 /* Serialize all requests */
179 ret = __hci_request(hdev, req, opt, timeout);
180 hci_req_unlock(hdev);
185 static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
187 BT_DBG("%s %ld", hdev->name, opt);
190 set_bit(HCI_RESET, &hdev->flags);
191 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
194 static void bredr_init(struct hci_dev *hdev)
196 struct hci_cp_delete_stored_link_key cp;
200 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
202 /* Mandatory initialization */
205 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
206 set_bit(HCI_RESET, &hdev->flags);
207 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
210 /* Read Local Supported Features */
211 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
213 /* Read Local Version */
214 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
216 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
217 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
219 /* Read BD Address */
220 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
222 /* Read Class of Device */
223 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
225 /* Read Local Name */
226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
228 /* Read Voice Setting */
229 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
231 /* Optional initialization */
233 /* Clear Event Filters */
234 flt_type = HCI_FLT_CLEAR_ALL;
235 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
237 /* Connection accept timeout ~20 secs */
238 param = cpu_to_le16(0x7d00);
239 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
241 bacpy(&cp.bdaddr, BDADDR_ANY);
243 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
246 static void amp_init(struct hci_dev *hdev)
248 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
251 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
253 /* Read Local Version */
254 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
257 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
261 BT_DBG("%s %ld", hdev->name, opt);
263 /* Driver initialization */
265 /* Special commands */
266 while ((skb = skb_dequeue(&hdev->driver_init))) {
267 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
268 skb->dev = (void *) hdev;
270 skb_queue_tail(&hdev->cmd_q, skb);
271 queue_work(hdev->workqueue, &hdev->cmd_work);
273 skb_queue_purge(&hdev->driver_init);
275 switch (hdev->dev_type) {
285 BT_ERR("Unknown device type %d", hdev->dev_type);
291 static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
293 BT_DBG("%s", hdev->name);
295 /* Read LE buffer size */
296 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
299 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
303 BT_DBG("%s %x", hdev->name, scan);
305 /* Inquiry and Page scans */
306 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
309 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
313 BT_DBG("%s %x", hdev->name, auth);
316 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
319 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
323 BT_DBG("%s %x", hdev->name, encrypt);
326 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
329 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
331 __le16 policy = cpu_to_le16(opt);
333 BT_DBG("%s %x", hdev->name, policy);
335 /* Default link policy */
336 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
339 /* Get HCI device by index.
340 * Device is held on return. */
341 struct hci_dev *hci_dev_get(int index)
343 struct hci_dev *hdev = NULL, *d;
350 read_lock(&hci_dev_list_lock);
351 list_for_each_entry(d, &hci_dev_list, list) {
352 if (d->id == index) {
353 hdev = hci_dev_hold(d);
357 read_unlock(&hci_dev_list_lock);
361 /* ---- Inquiry support ---- */
363 bool hci_discovery_active(struct hci_dev *hdev)
365 struct discovery_state *discov = &hdev->discovery;
367 switch (discov->state) {
368 case DISCOVERY_FINDING:
369 case DISCOVERY_RESOLVING:
377 void hci_discovery_set_state(struct hci_dev *hdev, int state)
379 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
381 if (hdev->discovery.state == state)
385 case DISCOVERY_STOPPED:
386 if (hdev->discovery.state != DISCOVERY_STARTING)
387 mgmt_discovering(hdev, 0);
388 hdev->discovery.type = 0;
390 case DISCOVERY_STARTING:
392 case DISCOVERY_FINDING:
393 mgmt_discovering(hdev, 1);
395 case DISCOVERY_RESOLVING:
397 case DISCOVERY_STOPPING:
401 hdev->discovery.state = state;
404 static void inquiry_cache_flush(struct hci_dev *hdev)
406 struct discovery_state *cache = &hdev->discovery;
407 struct inquiry_entry *p, *n;
409 list_for_each_entry_safe(p, n, &cache->all, all) {
414 INIT_LIST_HEAD(&cache->unknown);
415 INIT_LIST_HEAD(&cache->resolve);
418 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
420 struct discovery_state *cache = &hdev->discovery;
421 struct inquiry_entry *e;
423 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
425 list_for_each_entry(e, &cache->all, all) {
426 if (!bacmp(&e->data.bdaddr, bdaddr))
433 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
436 struct discovery_state *cache = &hdev->discovery;
437 struct inquiry_entry *e;
439 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
441 list_for_each_entry(e, &cache->unknown, list) {
442 if (!bacmp(&e->data.bdaddr, bdaddr))
449 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
453 struct discovery_state *cache = &hdev->discovery;
454 struct inquiry_entry *e;
456 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
458 list_for_each_entry(e, &cache->resolve, list) {
459 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
461 if (!bacmp(&e->data.bdaddr, bdaddr))
468 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
469 struct inquiry_entry *ie)
471 struct discovery_state *cache = &hdev->discovery;
472 struct list_head *pos = &cache->resolve;
473 struct inquiry_entry *p;
477 list_for_each_entry(p, &cache->resolve, list) {
478 if (p->name_state != NAME_PENDING &&
479 abs(p->data.rssi) >= abs(ie->data.rssi))
484 list_add(&ie->list, pos);
487 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
488 bool name_known, bool *ssp)
490 struct discovery_state *cache = &hdev->discovery;
491 struct inquiry_entry *ie;
493 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
496 *ssp = data->ssp_mode;
498 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
500 if (ie->data.ssp_mode && ssp)
503 if (ie->name_state == NAME_NEEDED &&
504 data->rssi != ie->data.rssi) {
505 ie->data.rssi = data->rssi;
506 hci_inquiry_cache_update_resolve(hdev, ie);
512 /* Entry not in the cache. Add new one. */
513 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
517 list_add(&ie->all, &cache->all);
520 ie->name_state = NAME_KNOWN;
522 ie->name_state = NAME_NOT_KNOWN;
523 list_add(&ie->list, &cache->unknown);
527 if (name_known && ie->name_state != NAME_KNOWN &&
528 ie->name_state != NAME_PENDING) {
529 ie->name_state = NAME_KNOWN;
533 memcpy(&ie->data, data, sizeof(*data));
534 ie->timestamp = jiffies;
535 cache->timestamp = jiffies;
537 if (ie->name_state == NAME_NOT_KNOWN)
543 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
545 struct discovery_state *cache = &hdev->discovery;
546 struct inquiry_info *info = (struct inquiry_info *) buf;
547 struct inquiry_entry *e;
550 list_for_each_entry(e, &cache->all, all) {
551 struct inquiry_data *data = &e->data;
556 bacpy(&info->bdaddr, &data->bdaddr);
557 info->pscan_rep_mode = data->pscan_rep_mode;
558 info->pscan_period_mode = data->pscan_period_mode;
559 info->pscan_mode = data->pscan_mode;
560 memcpy(info->dev_class, data->dev_class, 3);
561 info->clock_offset = data->clock_offset;
567 BT_DBG("cache %p, copied %d", cache, copied);
571 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
573 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
574 struct hci_cp_inquiry cp;
576 BT_DBG("%s", hdev->name);
578 if (test_bit(HCI_INQUIRY, &hdev->flags))
582 memcpy(&cp.lap, &ir->lap, 3);
583 cp.length = ir->length;
584 cp.num_rsp = ir->num_rsp;
585 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
588 int hci_inquiry(void __user *arg)
590 __u8 __user *ptr = arg;
591 struct hci_inquiry_req ir;
592 struct hci_dev *hdev;
593 int err = 0, do_inquiry = 0, max_rsp;
597 if (copy_from_user(&ir, ptr, sizeof(ir)))
600 hdev = hci_dev_get(ir.dev_id);
605 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
606 inquiry_cache_empty(hdev) ||
607 ir.flags & IREQ_CACHE_FLUSH) {
608 inquiry_cache_flush(hdev);
611 hci_dev_unlock(hdev);
613 timeo = ir.length * msecs_to_jiffies(2000);
616 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
621 /* for unlimited number of responses we will use buffer with 255 entries */
622 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
624 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
625 * copy it to the user space.
627 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
634 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
635 hci_dev_unlock(hdev);
637 BT_DBG("num_rsp %d", ir.num_rsp);
639 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
641 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
654 /* ---- HCI ioctl helpers ---- */
656 int hci_dev_open(__u16 dev)
658 struct hci_dev *hdev;
661 hdev = hci_dev_get(dev);
665 BT_DBG("%s %p", hdev->name, hdev);
669 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
674 if (test_bit(HCI_UP, &hdev->flags)) {
679 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
680 set_bit(HCI_RAW, &hdev->flags);
682 /* Treat all non BR/EDR controllers as raw devices if
683 enable_hs is not set */
684 if (hdev->dev_type != HCI_BREDR && !enable_hs)
685 set_bit(HCI_RAW, &hdev->flags);
687 if (hdev->open(hdev)) {
692 if (!test_bit(HCI_RAW, &hdev->flags)) {
693 atomic_set(&hdev->cmd_cnt, 1);
694 set_bit(HCI_INIT, &hdev->flags);
695 hdev->init_last_cmd = 0;
697 ret = __hci_request(hdev, hci_init_req, 0,
698 msecs_to_jiffies(HCI_INIT_TIMEOUT));
700 if (lmp_host_le_capable(hdev))
701 ret = __hci_request(hdev, hci_le_init_req, 0,
702 msecs_to_jiffies(HCI_INIT_TIMEOUT));
704 clear_bit(HCI_INIT, &hdev->flags);
709 set_bit(HCI_UP, &hdev->flags);
710 hci_notify(hdev, HCI_DEV_UP);
711 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
713 mgmt_powered(hdev, 1);
714 hci_dev_unlock(hdev);
717 /* Init failed, cleanup */
718 flush_work(&hdev->tx_work);
719 flush_work(&hdev->cmd_work);
720 flush_work(&hdev->rx_work);
722 skb_queue_purge(&hdev->cmd_q);
723 skb_queue_purge(&hdev->rx_q);
728 if (hdev->sent_cmd) {
729 kfree_skb(hdev->sent_cmd);
730 hdev->sent_cmd = NULL;
738 hci_req_unlock(hdev);
743 static int hci_dev_do_close(struct hci_dev *hdev)
745 BT_DBG("%s %p", hdev->name, hdev);
747 cancel_work_sync(&hdev->le_scan);
749 hci_req_cancel(hdev, ENODEV);
752 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
753 del_timer_sync(&hdev->cmd_timer);
754 hci_req_unlock(hdev);
758 /* Flush RX and TX works */
759 flush_work(&hdev->tx_work);
760 flush_work(&hdev->rx_work);
762 if (hdev->discov_timeout > 0) {
763 cancel_delayed_work(&hdev->discov_off);
764 hdev->discov_timeout = 0;
765 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
768 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
769 cancel_delayed_work(&hdev->service_cache);
771 cancel_delayed_work_sync(&hdev->le_scan_disable);
774 inquiry_cache_flush(hdev);
775 hci_conn_hash_flush(hdev);
776 hci_dev_unlock(hdev);
778 hci_notify(hdev, HCI_DEV_DOWN);
784 skb_queue_purge(&hdev->cmd_q);
785 atomic_set(&hdev->cmd_cnt, 1);
786 if (!test_bit(HCI_RAW, &hdev->flags) &&
787 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
788 set_bit(HCI_INIT, &hdev->flags);
789 __hci_request(hdev, hci_reset_req, 0,
790 msecs_to_jiffies(250));
791 clear_bit(HCI_INIT, &hdev->flags);
795 flush_work(&hdev->cmd_work);
798 skb_queue_purge(&hdev->rx_q);
799 skb_queue_purge(&hdev->cmd_q);
800 skb_queue_purge(&hdev->raw_q);
802 /* Drop last sent command */
803 if (hdev->sent_cmd) {
804 del_timer_sync(&hdev->cmd_timer);
805 kfree_skb(hdev->sent_cmd);
806 hdev->sent_cmd = NULL;
809 /* After this point our queues are empty
810 * and no tasks are scheduled. */
813 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
815 mgmt_powered(hdev, 0);
816 hci_dev_unlock(hdev);
822 memset(hdev->eir, 0, sizeof(hdev->eir));
823 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
825 hci_req_unlock(hdev);
831 int hci_dev_close(__u16 dev)
833 struct hci_dev *hdev;
836 hdev = hci_dev_get(dev);
840 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
841 cancel_delayed_work(&hdev->power_off);
843 err = hci_dev_do_close(hdev);
849 int hci_dev_reset(__u16 dev)
851 struct hci_dev *hdev;
854 hdev = hci_dev_get(dev);
860 if (!test_bit(HCI_UP, &hdev->flags))
864 skb_queue_purge(&hdev->rx_q);
865 skb_queue_purge(&hdev->cmd_q);
868 inquiry_cache_flush(hdev);
869 hci_conn_hash_flush(hdev);
870 hci_dev_unlock(hdev);
875 atomic_set(&hdev->cmd_cnt, 1);
876 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
878 if (!test_bit(HCI_RAW, &hdev->flags))
879 ret = __hci_request(hdev, hci_reset_req, 0,
880 msecs_to_jiffies(HCI_INIT_TIMEOUT));
883 hci_req_unlock(hdev);
888 int hci_dev_reset_stat(__u16 dev)
890 struct hci_dev *hdev;
893 hdev = hci_dev_get(dev);
897 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
904 int hci_dev_cmd(unsigned int cmd, void __user *arg)
906 struct hci_dev *hdev;
907 struct hci_dev_req dr;
910 if (copy_from_user(&dr, arg, sizeof(dr)))
913 hdev = hci_dev_get(dr.dev_id);
919 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
920 msecs_to_jiffies(HCI_INIT_TIMEOUT));
924 if (!lmp_encrypt_capable(hdev)) {
929 if (!test_bit(HCI_AUTH, &hdev->flags)) {
930 /* Auth must be enabled first */
931 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
932 msecs_to_jiffies(HCI_INIT_TIMEOUT));
937 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
938 msecs_to_jiffies(HCI_INIT_TIMEOUT));
942 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
943 msecs_to_jiffies(HCI_INIT_TIMEOUT));
947 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
948 msecs_to_jiffies(HCI_INIT_TIMEOUT));
952 hdev->link_mode = ((__u16) dr.dev_opt) &
953 (HCI_LM_MASTER | HCI_LM_ACCEPT);
957 hdev->pkt_type = (__u16) dr.dev_opt;
961 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
962 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
966 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
967 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
979 int hci_get_dev_list(void __user *arg)
981 struct hci_dev *hdev;
982 struct hci_dev_list_req *dl;
983 struct hci_dev_req *dr;
984 int n = 0, size, err;
987 if (get_user(dev_num, (__u16 __user *) arg))
990 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
993 size = sizeof(*dl) + dev_num * sizeof(*dr);
995 dl = kzalloc(size, GFP_KERNEL);
1001 read_lock(&hci_dev_list_lock);
1002 list_for_each_entry(hdev, &hci_dev_list, list) {
1003 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1004 cancel_delayed_work(&hdev->power_off);
1006 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1007 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1009 (dr + n)->dev_id = hdev->id;
1010 (dr + n)->dev_opt = hdev->flags;
1015 read_unlock(&hci_dev_list_lock);
1018 size = sizeof(*dl) + n * sizeof(*dr);
1020 err = copy_to_user(arg, dl, size);
1023 return err ? -EFAULT : 0;
1026 int hci_get_dev_info(void __user *arg)
1028 struct hci_dev *hdev;
1029 struct hci_dev_info di;
1032 if (copy_from_user(&di, arg, sizeof(di)))
1035 hdev = hci_dev_get(di.dev_id);
1039 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1040 cancel_delayed_work_sync(&hdev->power_off);
1042 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1043 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1045 strcpy(di.name, hdev->name);
1046 di.bdaddr = hdev->bdaddr;
1047 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1048 di.flags = hdev->flags;
1049 di.pkt_type = hdev->pkt_type;
1050 di.acl_mtu = hdev->acl_mtu;
1051 di.acl_pkts = hdev->acl_pkts;
1052 di.sco_mtu = hdev->sco_mtu;
1053 di.sco_pkts = hdev->sco_pkts;
1054 di.link_policy = hdev->link_policy;
1055 di.link_mode = hdev->link_mode;
1057 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1058 memcpy(&di.features, &hdev->features, sizeof(di.features));
1060 if (copy_to_user(arg, &di, sizeof(di)))
1068 /* ---- Interface to HCI drivers ---- */
1070 static int hci_rfkill_set_block(void *data, bool blocked)
1072 struct hci_dev *hdev = data;
1074 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1079 hci_dev_do_close(hdev);
1084 static const struct rfkill_ops hci_rfkill_ops = {
1085 .set_block = hci_rfkill_set_block,
1088 /* Alloc HCI device */
1089 struct hci_dev *hci_alloc_dev(void)
1091 struct hci_dev *hdev;
1093 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1097 hci_init_sysfs(hdev);
1098 skb_queue_head_init(&hdev->driver_init);
1102 EXPORT_SYMBOL(hci_alloc_dev);
1104 /* Free HCI device */
1105 void hci_free_dev(struct hci_dev *hdev)
1107 skb_queue_purge(&hdev->driver_init);
1109 /* will free via device release */
1110 put_device(&hdev->dev);
1112 EXPORT_SYMBOL(hci_free_dev);
1114 static void hci_power_on(struct work_struct *work)
1116 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1118 BT_DBG("%s", hdev->name);
1120 if (hci_dev_open(hdev->id) < 0)
1123 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1124 schedule_delayed_work(&hdev->power_off,
1125 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
1127 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1128 mgmt_index_added(hdev);
1131 static void hci_power_off(struct work_struct *work)
1133 struct hci_dev *hdev = container_of(work, struct hci_dev,
1136 BT_DBG("%s", hdev->name);
1138 hci_dev_do_close(hdev);
1141 static void hci_discov_off(struct work_struct *work)
1143 struct hci_dev *hdev;
1144 u8 scan = SCAN_PAGE;
1146 hdev = container_of(work, struct hci_dev, discov_off.work);
1148 BT_DBG("%s", hdev->name);
1152 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1154 hdev->discov_timeout = 0;
1156 hci_dev_unlock(hdev);
1159 int hci_uuids_clear(struct hci_dev *hdev)
1161 struct list_head *p, *n;
1163 list_for_each_safe(p, n, &hdev->uuids) {
1164 struct bt_uuid *uuid;
1166 uuid = list_entry(p, struct bt_uuid, list);
1175 int hci_link_keys_clear(struct hci_dev *hdev)
1177 struct list_head *p, *n;
1179 list_for_each_safe(p, n, &hdev->link_keys) {
1180 struct link_key *key;
1182 key = list_entry(p, struct link_key, list);
1191 int hci_smp_ltks_clear(struct hci_dev *hdev)
1193 struct smp_ltk *k, *tmp;
1195 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1203 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1207 list_for_each_entry(k, &hdev->link_keys, list)
1208 if (bacmp(bdaddr, &k->bdaddr) == 0)
1214 static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1215 u8 key_type, u8 old_key_type)
1218 if (key_type < 0x03)
1221 /* Debug keys are insecure so don't store them persistently */
1222 if (key_type == HCI_LK_DEBUG_COMBINATION)
1225 /* Changed combination key and there's no previous one */
1226 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1229 /* Security mode 3 case */
1233 /* Neither local nor remote side had no-bonding as requirement */
1234 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1237 /* Local side had dedicated bonding as requirement */
1238 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1241 /* Remote side had dedicated bonding as requirement */
1242 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1245 /* If none of the above criteria match, then don't store the key
1250 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1254 list_for_each_entry(k, &hdev->long_term_keys, list) {
1255 if (k->ediv != ediv ||
1256 memcmp(rand, k->rand, sizeof(k->rand)))
1264 EXPORT_SYMBOL(hci_find_ltk);
1266 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1271 list_for_each_entry(k, &hdev->long_term_keys, list)
1272 if (addr_type == k->bdaddr_type &&
1273 bacmp(bdaddr, &k->bdaddr) == 0)
1278 EXPORT_SYMBOL(hci_find_ltk_by_addr);
1280 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1281 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1283 struct link_key *key, *old_key;
1284 u8 old_key_type, persistent;
1286 old_key = hci_find_link_key(hdev, bdaddr);
1288 old_key_type = old_key->type;
1291 old_key_type = conn ? conn->key_type : 0xff;
1292 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1295 list_add(&key->list, &hdev->link_keys);
1298 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1300 /* Some buggy controller combinations generate a changed
1301 * combination key for legacy pairing even when there's no
1303 if (type == HCI_LK_CHANGED_COMBINATION &&
1304 (!conn || conn->remote_auth == 0xff) &&
1305 old_key_type == 0xff) {
1306 type = HCI_LK_COMBINATION;
1308 conn->key_type = type;
1311 bacpy(&key->bdaddr, bdaddr);
1312 memcpy(key->val, val, 16);
1313 key->pin_len = pin_len;
1315 if (type == HCI_LK_CHANGED_COMBINATION)
1316 key->type = old_key_type;
1323 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1325 mgmt_new_link_key(hdev, key, persistent);
1328 list_del(&key->list);
1335 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1336 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, u16
1339 struct smp_ltk *key, *old_key;
1341 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1344 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1348 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1351 list_add(&key->list, &hdev->long_term_keys);
1354 bacpy(&key->bdaddr, bdaddr);
1355 key->bdaddr_type = addr_type;
1356 memcpy(key->val, tk, sizeof(key->val));
1357 key->authenticated = authenticated;
1359 key->enc_size = enc_size;
1361 memcpy(key->rand, rand, sizeof(key->rand));
1366 if (type & HCI_SMP_LTK)
1367 mgmt_new_ltk(hdev, key, 1);
1372 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1374 struct link_key *key;
1376 key = hci_find_link_key(hdev, bdaddr);
1380 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1382 list_del(&key->list);
1388 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1390 struct smp_ltk *k, *tmp;
1392 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1393 if (bacmp(bdaddr, &k->bdaddr))
1396 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1405 /* HCI command timer function */
1406 static void hci_cmd_timer(unsigned long arg)
1408 struct hci_dev *hdev = (void *) arg;
1410 BT_ERR("%s command tx timeout", hdev->name);
1411 atomic_set(&hdev->cmd_cnt, 1);
1412 queue_work(hdev->workqueue, &hdev->cmd_work);
1415 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1418 struct oob_data *data;
1420 list_for_each_entry(data, &hdev->remote_oob_data, list)
1421 if (bacmp(bdaddr, &data->bdaddr) == 0)
1427 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1429 struct oob_data *data;
1431 data = hci_find_remote_oob_data(hdev, bdaddr);
1435 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1437 list_del(&data->list);
1443 int hci_remote_oob_data_clear(struct hci_dev *hdev)
1445 struct oob_data *data, *n;
1447 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1448 list_del(&data->list);
1455 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1458 struct oob_data *data;
1460 data = hci_find_remote_oob_data(hdev, bdaddr);
1463 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1467 bacpy(&data->bdaddr, bdaddr);
1468 list_add(&data->list, &hdev->remote_oob_data);
1471 memcpy(data->hash, hash, sizeof(data->hash));
1472 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1474 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1479 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1481 struct bdaddr_list *b;
1483 list_for_each_entry(b, &hdev->blacklist, list)
1484 if (bacmp(bdaddr, &b->bdaddr) == 0)
1490 int hci_blacklist_clear(struct hci_dev *hdev)
1492 struct list_head *p, *n;
1494 list_for_each_safe(p, n, &hdev->blacklist) {
1495 struct bdaddr_list *b;
1497 b = list_entry(p, struct bdaddr_list, list);
1506 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1508 struct bdaddr_list *entry;
1510 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1513 if (hci_blacklist_lookup(hdev, bdaddr))
1516 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1520 bacpy(&entry->bdaddr, bdaddr);
1522 list_add(&entry->list, &hdev->blacklist);
1524 return mgmt_device_blocked(hdev, bdaddr, type);
1527 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1529 struct bdaddr_list *entry;
1531 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1532 return hci_blacklist_clear(hdev);
1534 entry = hci_blacklist_lookup(hdev, bdaddr);
1538 list_del(&entry->list);
1541 return mgmt_device_unblocked(hdev, bdaddr, type);
1544 static void hci_clear_adv_cache(struct work_struct *work)
1546 struct hci_dev *hdev = container_of(work, struct hci_dev,
1551 hci_adv_entries_clear(hdev);
1553 hci_dev_unlock(hdev);
1556 int hci_adv_entries_clear(struct hci_dev *hdev)
1558 struct adv_entry *entry, *tmp;
1560 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1561 list_del(&entry->list);
1565 BT_DBG("%s adv cache cleared", hdev->name);
1570 struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1572 struct adv_entry *entry;
1574 list_for_each_entry(entry, &hdev->adv_entries, list)
1575 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1581 static inline int is_connectable_adv(u8 evt_type)
1583 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1589 int hci_add_adv_entry(struct hci_dev *hdev,
1590 struct hci_ev_le_advertising_info *ev) { struct adv_entry *entry; if (!is_connectable_adv(ev->evt_type))
1593 /* Only new entries should be added to adv_entries. So, if
1594 * bdaddr was found, don't add it. */
1595 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1598 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1602 bacpy(&entry->bdaddr, &ev->bdaddr);
1603 entry->bdaddr_type = ev->bdaddr_type;
1605 list_add(&entry->list, &hdev->adv_entries);
1607 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1608 batostr(&entry->bdaddr), entry->bdaddr_type);
1613 static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1615 struct le_scan_params *param = (struct le_scan_params *) opt;
1616 struct hci_cp_le_set_scan_param cp;
1618 memset(&cp, 0, sizeof(cp));
1619 cp.type = param->type;
1620 cp.interval = cpu_to_le16(param->interval);
1621 cp.window = cpu_to_le16(param->window);
1623 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1626 static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1628 struct hci_cp_le_set_scan_enable cp;
1630 memset(&cp, 0, sizeof(cp));
1633 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1636 static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1637 u16 window, int timeout)
1639 long timeo = msecs_to_jiffies(3000);
1640 struct le_scan_params param;
1643 BT_DBG("%s", hdev->name);
1645 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1646 return -EINPROGRESS;
1649 param.interval = interval;
1650 param.window = window;
1654 err = __hci_request(hdev, le_scan_param_req, (unsigned long) ¶m,
1657 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1659 hci_req_unlock(hdev);
1664 schedule_delayed_work(&hdev->le_scan_disable,
1665 msecs_to_jiffies(timeout));
1670 static void le_scan_disable_work(struct work_struct *work)
1672 struct hci_dev *hdev = container_of(work, struct hci_dev,
1673 le_scan_disable.work);
1674 struct hci_cp_le_set_scan_enable cp;
1676 BT_DBG("%s", hdev->name);
1678 memset(&cp, 0, sizeof(cp));
1680 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1683 static void le_scan_work(struct work_struct *work)
1685 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1686 struct le_scan_params *param = &hdev->le_scan_params;
1688 BT_DBG("%s", hdev->name);
1690 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1694 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1697 struct le_scan_params *param = &hdev->le_scan_params;
1699 BT_DBG("%s", hdev->name);
1701 if (work_busy(&hdev->le_scan))
1702 return -EINPROGRESS;
1705 param->interval = interval;
1706 param->window = window;
1707 param->timeout = timeout;
1709 queue_work(system_long_wq, &hdev->le_scan);
1714 /* Register HCI device */
1715 int hci_register_dev(struct hci_dev *hdev)
1717 struct list_head *head = &hci_dev_list, *p;
1720 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1722 if (!hdev->open || !hdev->close)
1725 /* Do not allow HCI_AMP devices to register at index 0,
1726 * so the index can be used as the AMP controller ID.
1728 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
1730 write_lock(&hci_dev_list_lock);
1732 /* Find first available device id */
1733 list_for_each(p, &hci_dev_list) {
1734 if (list_entry(p, struct hci_dev, list)->id != id)
1739 sprintf(hdev->name, "hci%d", id);
1741 list_add_tail(&hdev->list, head);
1743 mutex_init(&hdev->lock);
1746 hdev->dev_flags = 0;
1747 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1748 hdev->esco_type = (ESCO_HV1);
1749 hdev->link_mode = (HCI_LM_ACCEPT);
1750 hdev->io_capability = 0x03; /* No Input No Output */
1752 hdev->idle_timeout = 0;
1753 hdev->sniff_max_interval = 800;
1754 hdev->sniff_min_interval = 80;
1756 INIT_WORK(&hdev->rx_work, hci_rx_work);
1757 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1758 INIT_WORK(&hdev->tx_work, hci_tx_work);
1761 skb_queue_head_init(&hdev->rx_q);
1762 skb_queue_head_init(&hdev->cmd_q);
1763 skb_queue_head_init(&hdev->raw_q);
1765 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1767 for (i = 0; i < NUM_REASSEMBLY; i++)
1768 hdev->reassembly[i] = NULL;
1770 init_waitqueue_head(&hdev->req_wait_q);
1771 mutex_init(&hdev->req_lock);
1773 discovery_init(hdev);
1775 hci_conn_hash_init(hdev);
1777 INIT_LIST_HEAD(&hdev->mgmt_pending);
1779 INIT_LIST_HEAD(&hdev->blacklist);
1781 INIT_LIST_HEAD(&hdev->uuids);
1783 INIT_LIST_HEAD(&hdev->link_keys);
1784 INIT_LIST_HEAD(&hdev->long_term_keys);
1786 INIT_LIST_HEAD(&hdev->remote_oob_data);
1788 INIT_LIST_HEAD(&hdev->adv_entries);
1790 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
1791 INIT_WORK(&hdev->power_on, hci_power_on);
1792 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1794 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1796 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1798 atomic_set(&hdev->promisc, 0);
1800 INIT_WORK(&hdev->le_scan, le_scan_work);
1802 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1804 write_unlock(&hci_dev_list_lock);
1806 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1808 if (!hdev->workqueue) {
1813 error = hci_add_sysfs(hdev);
1817 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1818 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1820 if (rfkill_register(hdev->rfkill) < 0) {
1821 rfkill_destroy(hdev->rfkill);
1822 hdev->rfkill = NULL;
1826 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1827 set_bit(HCI_SETUP, &hdev->dev_flags);
1828 schedule_work(&hdev->power_on);
1830 hci_notify(hdev, HCI_DEV_REG);
1836 destroy_workqueue(hdev->workqueue);
1838 write_lock(&hci_dev_list_lock);
1839 list_del(&hdev->list);
1840 write_unlock(&hci_dev_list_lock);
1844 EXPORT_SYMBOL(hci_register_dev);
1846 /* Unregister HCI device */
1847 void hci_unregister_dev(struct hci_dev *hdev)
1851 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1853 write_lock(&hci_dev_list_lock);
1854 list_del(&hdev->list);
1855 write_unlock(&hci_dev_list_lock);
1857 hci_dev_do_close(hdev);
1859 for (i = 0; i < NUM_REASSEMBLY; i++)
1860 kfree_skb(hdev->reassembly[i]);
1862 if (!test_bit(HCI_INIT, &hdev->flags) &&
1863 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1865 mgmt_index_removed(hdev);
1866 hci_dev_unlock(hdev);
1869 /* mgmt_index_removed should take care of emptying the
1871 BUG_ON(!list_empty(&hdev->mgmt_pending));
1873 hci_notify(hdev, HCI_DEV_UNREG);
1876 rfkill_unregister(hdev->rfkill);
1877 rfkill_destroy(hdev->rfkill);
1880 hci_del_sysfs(hdev);
1882 cancel_delayed_work_sync(&hdev->adv_work);
1884 destroy_workqueue(hdev->workqueue);
1887 hci_blacklist_clear(hdev);
1888 hci_uuids_clear(hdev);
1889 hci_link_keys_clear(hdev);
1890 hci_smp_ltks_clear(hdev);
1891 hci_remote_oob_data_clear(hdev);
1892 hci_adv_entries_clear(hdev);
1893 hci_dev_unlock(hdev);
1897 EXPORT_SYMBOL(hci_unregister_dev);
1899 /* Suspend HCI device */
1900 int hci_suspend_dev(struct hci_dev *hdev)
1902 hci_notify(hdev, HCI_DEV_SUSPEND);
1905 EXPORT_SYMBOL(hci_suspend_dev);
1907 /* Resume HCI device */
1908 int hci_resume_dev(struct hci_dev *hdev)
1910 hci_notify(hdev, HCI_DEV_RESUME);
1913 EXPORT_SYMBOL(hci_resume_dev);
1915 /* Receive frame from HCI drivers */
1916 int hci_recv_frame(struct sk_buff *skb)
1918 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1919 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1920 && !test_bit(HCI_INIT, &hdev->flags))) {
1926 bt_cb(skb)->incoming = 1;
1929 __net_timestamp(skb);
1931 skb_queue_tail(&hdev->rx_q, skb);
1932 queue_work(hdev->workqueue, &hdev->rx_work);
1936 EXPORT_SYMBOL(hci_recv_frame);
1938 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1939 int count, __u8 index)
1944 struct sk_buff *skb;
1945 struct bt_skb_cb *scb;
1947 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1948 index >= NUM_REASSEMBLY)
1951 skb = hdev->reassembly[index];
1955 case HCI_ACLDATA_PKT:
1956 len = HCI_MAX_FRAME_SIZE;
1957 hlen = HCI_ACL_HDR_SIZE;
1960 len = HCI_MAX_EVENT_SIZE;
1961 hlen = HCI_EVENT_HDR_SIZE;
1963 case HCI_SCODATA_PKT:
1964 len = HCI_MAX_SCO_SIZE;
1965 hlen = HCI_SCO_HDR_SIZE;
1969 skb = bt_skb_alloc(len, GFP_ATOMIC);
1973 scb = (void *) skb->cb;
1975 scb->pkt_type = type;
1977 skb->dev = (void *) hdev;
1978 hdev->reassembly[index] = skb;
1982 scb = (void *) skb->cb;
1983 len = min_t(uint, scb->expect, count);
1985 memcpy(skb_put(skb, len), data, len);
1994 if (skb->len == HCI_EVENT_HDR_SIZE) {
1995 struct hci_event_hdr *h = hci_event_hdr(skb);
1996 scb->expect = h->plen;
1998 if (skb_tailroom(skb) < scb->expect) {
2000 hdev->reassembly[index] = NULL;
2006 case HCI_ACLDATA_PKT:
2007 if (skb->len == HCI_ACL_HDR_SIZE) {
2008 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2009 scb->expect = __le16_to_cpu(h->dlen);
2011 if (skb_tailroom(skb) < scb->expect) {
2013 hdev->reassembly[index] = NULL;
2019 case HCI_SCODATA_PKT:
2020 if (skb->len == HCI_SCO_HDR_SIZE) {
2021 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2022 scb->expect = h->dlen;
2024 if (skb_tailroom(skb) < scb->expect) {
2026 hdev->reassembly[index] = NULL;
2033 if (scb->expect == 0) {
2034 /* Complete frame */
2036 bt_cb(skb)->pkt_type = type;
2037 hci_recv_frame(skb);
2039 hdev->reassembly[index] = NULL;
2047 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2051 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2055 rem = hci_reassembly(hdev, type, data, count, type - 1);
2059 data += (count - rem);
2065 EXPORT_SYMBOL(hci_recv_fragment);
2067 #define STREAM_REASSEMBLY 0
2069 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2075 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2078 struct { char type; } *pkt;
2080 /* Start of the frame */
2087 type = bt_cb(skb)->pkt_type;
2089 rem = hci_reassembly(hdev, type, data, count,
2094 data += (count - rem);
2100 EXPORT_SYMBOL(hci_recv_stream_fragment);
2102 /* ---- Interface to upper protocols ---- */
2104 int hci_register_cb(struct hci_cb *cb)
2106 BT_DBG("%p name %s", cb, cb->name);
2108 write_lock(&hci_cb_list_lock);
2109 list_add(&cb->list, &hci_cb_list);
2110 write_unlock(&hci_cb_list_lock);
2114 EXPORT_SYMBOL(hci_register_cb);
2116 int hci_unregister_cb(struct hci_cb *cb)
2118 BT_DBG("%p name %s", cb, cb->name);
2120 write_lock(&hci_cb_list_lock);
2121 list_del(&cb->list);
2122 write_unlock(&hci_cb_list_lock);
2126 EXPORT_SYMBOL(hci_unregister_cb);
2128 static int hci_send_frame(struct sk_buff *skb)
2130 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2137 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2140 __net_timestamp(skb);
2142 /* Send copy to monitor */
2143 hci_send_to_monitor(hdev, skb);
2145 if (atomic_read(&hdev->promisc)) {
2146 /* Send copy to the sockets */
2147 hci_send_to_sock(hdev, skb);
2150 /* Get rid of skb owner, prior to sending to the driver. */
2153 return hdev->send(skb);
2156 /* Send HCI command */
2157 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2159 int len = HCI_COMMAND_HDR_SIZE + plen;
2160 struct hci_command_hdr *hdr;
2161 struct sk_buff *skb;
2163 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
2165 skb = bt_skb_alloc(len, GFP_ATOMIC);
2167 BT_ERR("%s no memory for command", hdev->name);
2171 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2172 hdr->opcode = cpu_to_le16(opcode);
2176 memcpy(skb_put(skb, plen), param, plen);
2178 BT_DBG("skb len %d", skb->len);
2180 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2181 skb->dev = (void *) hdev;
2183 if (test_bit(HCI_INIT, &hdev->flags))
2184 hdev->init_last_cmd = opcode;
2186 skb_queue_tail(&hdev->cmd_q, skb);
2187 queue_work(hdev->workqueue, &hdev->cmd_work);
2192 /* Get data from the previously sent command */
2193 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2195 struct hci_command_hdr *hdr;
2197 if (!hdev->sent_cmd)
2200 hdr = (void *) hdev->sent_cmd->data;
2202 if (hdr->opcode != cpu_to_le16(opcode))
2205 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
2207 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2211 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2213 struct hci_acl_hdr *hdr;
2216 skb_push(skb, HCI_ACL_HDR_SIZE);
2217 skb_reset_transport_header(skb);
2218 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2219 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2220 hdr->dlen = cpu_to_le16(len);
2223 static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2224 struct sk_buff *skb, __u16 flags)
2226 struct hci_dev *hdev = conn->hdev;
2227 struct sk_buff *list;
2229 list = skb_shinfo(skb)->frag_list;
2231 /* Non fragmented */
2232 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2234 skb_queue_tail(queue, skb);
2237 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2239 skb_shinfo(skb)->frag_list = NULL;
2241 /* Queue all fragments atomically */
2242 spin_lock(&queue->lock);
2244 __skb_queue_tail(queue, skb);
2246 flags &= ~ACL_START;
2249 skb = list; list = list->next;
2251 skb->dev = (void *) hdev;
2252 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2253 hci_add_acl_hdr(skb, conn->handle, flags);
2255 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2257 __skb_queue_tail(queue, skb);
2260 spin_unlock(&queue->lock);
2264 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2266 struct hci_conn *conn = chan->conn;
2267 struct hci_dev *hdev = conn->hdev;
2269 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2271 skb->dev = (void *) hdev;
2272 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2273 hci_add_acl_hdr(skb, conn->handle, flags);
2275 hci_queue_acl(conn, &chan->data_q, skb, flags);
2277 queue_work(hdev->workqueue, &hdev->tx_work);
2279 EXPORT_SYMBOL(hci_send_acl);
2282 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2284 struct hci_dev *hdev = conn->hdev;
2285 struct hci_sco_hdr hdr;
2287 BT_DBG("%s len %d", hdev->name, skb->len);
2289 hdr.handle = cpu_to_le16(conn->handle);
2290 hdr.dlen = skb->len;
2292 skb_push(skb, HCI_SCO_HDR_SIZE);
2293 skb_reset_transport_header(skb);
2294 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2296 skb->dev = (void *) hdev;
2297 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2299 skb_queue_tail(&conn->data_q, skb);
2300 queue_work(hdev->workqueue, &hdev->tx_work);
2302 EXPORT_SYMBOL(hci_send_sco);
2304 /* ---- HCI TX task (outgoing data) ---- */
2306 /* HCI Connection scheduler */
2307 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2309 struct hci_conn_hash *h = &hdev->conn_hash;
2310 struct hci_conn *conn = NULL, *c;
2311 int num = 0, min = ~0;
2313 /* We don't have to lock device here. Connections are always
2314 * added and removed with TX task disabled. */
2318 list_for_each_entry_rcu(c, &h->list, list) {
2319 if (c->type != type || skb_queue_empty(&c->data_q))
2322 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2327 if (c->sent < min) {
2332 if (hci_conn_num(hdev, type) == num)
2341 switch (conn->type) {
2343 cnt = hdev->acl_cnt;
2347 cnt = hdev->sco_cnt;
2350 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2354 BT_ERR("Unknown link type");
2362 BT_DBG("conn %p quote %d", conn, *quote);
2366 static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2368 struct hci_conn_hash *h = &hdev->conn_hash;
2371 BT_ERR("%s link tx timeout", hdev->name);
2375 /* Kill stalled connections */
2376 list_for_each_entry_rcu(c, &h->list, list) {
2377 if (c->type == type && c->sent) {
2378 BT_ERR("%s killing stalled connection %s",
2379 hdev->name, batostr(&c->dst));
2380 hci_acl_disconn(c, 0x13);
2387 static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2390 struct hci_conn_hash *h = &hdev->conn_hash;
2391 struct hci_chan *chan = NULL;
2392 int num = 0, min = ~0, cur_prio = 0;
2393 struct hci_conn *conn;
2394 int cnt, q, conn_num = 0;
2396 BT_DBG("%s", hdev->name);
2400 list_for_each_entry_rcu(conn, &h->list, list) {
2401 struct hci_chan *tmp;
2403 if (conn->type != type)
2406 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2411 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2412 struct sk_buff *skb;
2414 if (skb_queue_empty(&tmp->data_q))
2417 skb = skb_peek(&tmp->data_q);
2418 if (skb->priority < cur_prio)
2421 if (skb->priority > cur_prio) {
2424 cur_prio = skb->priority;
2429 if (conn->sent < min) {
2435 if (hci_conn_num(hdev, type) == conn_num)
2444 switch (chan->conn->type) {
2446 cnt = hdev->acl_cnt;
2450 cnt = hdev->sco_cnt;
2453 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2457 BT_ERR("Unknown link type");
2462 BT_DBG("chan %p quote %d", chan, *quote);
2466 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2468 struct hci_conn_hash *h = &hdev->conn_hash;
2469 struct hci_conn *conn;
2472 BT_DBG("%s", hdev->name);
2476 list_for_each_entry_rcu(conn, &h->list, list) {
2477 struct hci_chan *chan;
2479 if (conn->type != type)
2482 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2487 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
2488 struct sk_buff *skb;
2495 if (skb_queue_empty(&chan->data_q))
2498 skb = skb_peek(&chan->data_q);
2499 if (skb->priority >= HCI_PRIO_MAX - 1)
2502 skb->priority = HCI_PRIO_MAX - 1;
2504 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2508 if (hci_conn_num(hdev, type) == num)
2516 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2518 /* Calculate count of blocks used by this packet */
2519 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2522 static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
2524 if (!test_bit(HCI_RAW, &hdev->flags)) {
2525 /* ACL tx timeout must be longer than maximum
2526 * link supervision timeout (40.9 seconds) */
2527 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
2528 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
2529 hci_link_tx_to(hdev, ACL_LINK);
2533 static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2535 unsigned int cnt = hdev->acl_cnt;
2536 struct hci_chan *chan;
2537 struct sk_buff *skb;
2540 __check_timeout(hdev, cnt);
2542 while (hdev->acl_cnt &&
2543 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
2544 u32 priority = (skb_peek(&chan->data_q))->priority;
2545 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2546 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2547 skb->len, skb->priority);
2549 /* Stop if priority has changed */
2550 if (skb->priority < priority)
2553 skb = skb_dequeue(&chan->data_q);
2555 hci_conn_enter_active_mode(chan->conn,
2556 bt_cb(skb)->force_active);
2558 hci_send_frame(skb);
2559 hdev->acl_last_tx = jiffies;
2567 if (cnt != hdev->acl_cnt)
2568 hci_prio_recalculate(hdev, ACL_LINK);
2571 static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2573 unsigned int cnt = hdev->block_cnt;
2574 struct hci_chan *chan;
2575 struct sk_buff *skb;
2578 __check_timeout(hdev, cnt);
2580 while (hdev->block_cnt > 0 &&
2581 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
2582 u32 priority = (skb_peek(&chan->data_q))->priority;
2583 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2586 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2587 skb->len, skb->priority);
2589 /* Stop if priority has changed */
2590 if (skb->priority < priority)
2593 skb = skb_dequeue(&chan->data_q);
2595 blocks = __get_blocks(hdev, skb);
2596 if (blocks > hdev->block_cnt)
2599 hci_conn_enter_active_mode(chan->conn,
2600 bt_cb(skb)->force_active);
2602 hci_send_frame(skb);
2603 hdev->acl_last_tx = jiffies;
2605 hdev->block_cnt -= blocks;
2608 chan->sent += blocks;
2609 chan->conn->sent += blocks;
2613 if (cnt != hdev->block_cnt)
2614 hci_prio_recalculate(hdev, ACL_LINK);
2617 static inline void hci_sched_acl(struct hci_dev *hdev)
2619 BT_DBG("%s", hdev->name);
2621 if (!hci_conn_num(hdev, ACL_LINK))
2624 switch (hdev->flow_ctl_mode) {
2625 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2626 hci_sched_acl_pkt(hdev);
2629 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2630 hci_sched_acl_blk(hdev);
2636 static inline void hci_sched_sco(struct hci_dev *hdev)
2638 struct hci_conn *conn;
2639 struct sk_buff *skb;
2642 BT_DBG("%s", hdev->name);
2644 if (!hci_conn_num(hdev, SCO_LINK))
2647 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
2648 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2649 BT_DBG("skb %p len %d", skb, skb->len);
2650 hci_send_frame(skb);
2653 if (conn->sent == ~0)
2659 static inline void hci_sched_esco(struct hci_dev *hdev)
2661 struct hci_conn *conn;
2662 struct sk_buff *skb;
2665 BT_DBG("%s", hdev->name);
2667 if (!hci_conn_num(hdev, ESCO_LINK))
2670 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) {
2671 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2672 BT_DBG("skb %p len %d", skb, skb->len);
2673 hci_send_frame(skb);
2676 if (conn->sent == ~0)
2682 static inline void hci_sched_le(struct hci_dev *hdev)
2684 struct hci_chan *chan;
2685 struct sk_buff *skb;
2686 int quote, cnt, tmp;
2688 BT_DBG("%s", hdev->name);
2690 if (!hci_conn_num(hdev, LE_LINK))
2693 if (!test_bit(HCI_RAW, &hdev->flags)) {
2694 /* LE tx timeout must be longer than maximum
2695 * link supervision timeout (40.9 seconds) */
2696 if (!hdev->le_cnt && hdev->le_pkts &&
2697 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2698 hci_link_tx_to(hdev, LE_LINK);
2701 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2703 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
2704 u32 priority = (skb_peek(&chan->data_q))->priority;
2705 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2706 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2707 skb->len, skb->priority);
2709 /* Stop if priority has changed */
2710 if (skb->priority < priority)
2713 skb = skb_dequeue(&chan->data_q);
2715 hci_send_frame(skb);
2716 hdev->le_last_tx = jiffies;
2727 hdev->acl_cnt = cnt;
2730 hci_prio_recalculate(hdev, LE_LINK);
2733 static void hci_tx_work(struct work_struct *work)
2735 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
2736 struct sk_buff *skb;
2738 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2739 hdev->sco_cnt, hdev->le_cnt);
2741 /* Schedule queues and send stuff to HCI driver */
2743 hci_sched_acl(hdev);
2745 hci_sched_sco(hdev);
2747 hci_sched_esco(hdev);
2751 /* Send next queued raw (unknown type) packet */
2752 while ((skb = skb_dequeue(&hdev->raw_q)))
2753 hci_send_frame(skb);
2756 /* ----- HCI RX task (incoming data processing) ----- */
2758 /* ACL data packet */
2759 static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2761 struct hci_acl_hdr *hdr = (void *) skb->data;
2762 struct hci_conn *conn;
2763 __u16 handle, flags;
2765 skb_pull(skb, HCI_ACL_HDR_SIZE);
2767 handle = __le16_to_cpu(hdr->handle);
2768 flags = hci_flags(handle);
2769 handle = hci_handle(handle);
2771 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2773 hdev->stat.acl_rx++;
2776 conn = hci_conn_hash_lookup_handle(hdev, handle);
2777 hci_dev_unlock(hdev);
2780 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
2782 /* Send to upper protocol */
2783 l2cap_recv_acldata(conn, skb, flags);
2786 BT_ERR("%s ACL packet for unknown connection handle %d",
2787 hdev->name, handle);
2793 /* SCO data packet */
2794 static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2796 struct hci_sco_hdr *hdr = (void *) skb->data;
2797 struct hci_conn *conn;
2800 skb_pull(skb, HCI_SCO_HDR_SIZE);
2802 handle = __le16_to_cpu(hdr->handle);
2804 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2806 hdev->stat.sco_rx++;
2809 conn = hci_conn_hash_lookup_handle(hdev, handle);
2810 hci_dev_unlock(hdev);
2813 /* Send to upper protocol */
2814 sco_recv_scodata(conn, skb);
2817 BT_ERR("%s SCO packet for unknown connection handle %d",
2818 hdev->name, handle);
2824 static void hci_rx_work(struct work_struct *work)
2826 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
2827 struct sk_buff *skb;
2829 BT_DBG("%s", hdev->name);
2831 while ((skb = skb_dequeue(&hdev->rx_q))) {
2832 /* Send copy to monitor */
2833 hci_send_to_monitor(hdev, skb);
2835 if (atomic_read(&hdev->promisc)) {
2836 /* Send copy to the sockets */
2837 hci_send_to_sock(hdev, skb);
2840 if (test_bit(HCI_RAW, &hdev->flags)) {
2845 if (test_bit(HCI_INIT, &hdev->flags)) {
2846 /* Don't process data packets in this states. */
2847 switch (bt_cb(skb)->pkt_type) {
2848 case HCI_ACLDATA_PKT:
2849 case HCI_SCODATA_PKT:
2856 switch (bt_cb(skb)->pkt_type) {
2858 BT_DBG("%s Event packet", hdev->name);
2859 hci_event_packet(hdev, skb);
2862 case HCI_ACLDATA_PKT:
2863 BT_DBG("%s ACL data packet", hdev->name);
2864 hci_acldata_packet(hdev, skb);
2867 case HCI_SCODATA_PKT:
2868 BT_DBG("%s SCO data packet", hdev->name);
2869 hci_scodata_packet(hdev, skb);
2879 static void hci_cmd_work(struct work_struct *work)
2881 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
2882 struct sk_buff *skb;
2884 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2886 /* Send queued commands */
2887 if (atomic_read(&hdev->cmd_cnt)) {
2888 skb = skb_dequeue(&hdev->cmd_q);
2892 kfree_skb(hdev->sent_cmd);
2894 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2895 if (hdev->sent_cmd) {
2896 atomic_dec(&hdev->cmd_cnt);
2897 hci_send_frame(skb);
2898 if (test_bit(HCI_RESET, &hdev->flags))
2899 del_timer(&hdev->cmd_timer);
2901 mod_timer(&hdev->cmd_timer,
2902 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
2904 skb_queue_head(&hdev->cmd_q, skb);
2905 queue_work(hdev->workqueue, &hdev->cmd_work);
2910 int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2912 /* General inquiry access code (GIAC) */
2913 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2914 struct hci_cp_inquiry cp;
2916 BT_DBG("%s", hdev->name);
2918 if (test_bit(HCI_INQUIRY, &hdev->flags))
2919 return -EINPROGRESS;
2921 inquiry_cache_flush(hdev);
2923 memset(&cp, 0, sizeof(cp));
2924 memcpy(&cp.lap, lap, sizeof(cp.lap));
2927 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2930 int hci_cancel_inquiry(struct hci_dev *hdev)
2932 BT_DBG("%s", hdev->name);
2934 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2937 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);