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 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
183 /* Read Local Supported Features */
184 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
186 /* Read Local Version */
187 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
190 static void amp_init(struct hci_dev *hdev)
192 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
194 /* Read Local Version */
195 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
197 /* Read Local AMP Info */
198 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
200 /* Read Data Blk size */
201 hci_send_cmd(hdev, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
204 static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
208 BT_DBG("%s %ld", hdev->name, opt);
210 /* Driver initialization */
212 /* Special commands */
213 while ((skb = skb_dequeue(&hdev->driver_init))) {
214 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
215 skb->dev = (void *) hdev;
217 skb_queue_tail(&hdev->cmd_q, skb);
218 queue_work(hdev->workqueue, &hdev->cmd_work);
220 skb_queue_purge(&hdev->driver_init);
223 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
224 hci_reset_req(hdev, 0);
226 switch (hdev->dev_type) {
236 BT_ERR("Unknown device type %d", hdev->dev_type);
241 static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
245 BT_DBG("%s %x", hdev->name, scan);
247 /* Inquiry and Page scans */
248 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
251 static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
255 BT_DBG("%s %x", hdev->name, auth);
258 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
261 static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
265 BT_DBG("%s %x", hdev->name, encrypt);
268 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
271 static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
273 __le16 policy = cpu_to_le16(opt);
275 BT_DBG("%s %x", hdev->name, policy);
277 /* Default link policy */
278 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
281 /* Get HCI device by index.
282 * Device is held on return. */
283 struct hci_dev *hci_dev_get(int index)
285 struct hci_dev *hdev = NULL, *d;
292 read_lock(&hci_dev_list_lock);
293 list_for_each_entry(d, &hci_dev_list, list) {
294 if (d->id == index) {
295 hdev = hci_dev_hold(d);
299 read_unlock(&hci_dev_list_lock);
303 /* ---- Inquiry support ---- */
305 bool hci_discovery_active(struct hci_dev *hdev)
307 struct discovery_state *discov = &hdev->discovery;
309 switch (discov->state) {
310 case DISCOVERY_FINDING:
311 case DISCOVERY_RESOLVING:
319 void hci_discovery_set_state(struct hci_dev *hdev, int state)
321 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
323 if (hdev->discovery.state == state)
327 case DISCOVERY_STOPPED:
328 if (hdev->discovery.state != DISCOVERY_STARTING)
329 mgmt_discovering(hdev, 0);
331 case DISCOVERY_STARTING:
333 case DISCOVERY_FINDING:
334 mgmt_discovering(hdev, 1);
336 case DISCOVERY_RESOLVING:
338 case DISCOVERY_STOPPING:
342 hdev->discovery.state = state;
345 static void inquiry_cache_flush(struct hci_dev *hdev)
347 struct discovery_state *cache = &hdev->discovery;
348 struct inquiry_entry *p, *n;
350 list_for_each_entry_safe(p, n, &cache->all, all) {
355 INIT_LIST_HEAD(&cache->unknown);
356 INIT_LIST_HEAD(&cache->resolve);
359 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
362 struct discovery_state *cache = &hdev->discovery;
363 struct inquiry_entry *e;
365 BT_DBG("cache %p, %pMR", cache, bdaddr);
367 list_for_each_entry(e, &cache->all, all) {
368 if (!bacmp(&e->data.bdaddr, bdaddr))
375 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
378 struct discovery_state *cache = &hdev->discovery;
379 struct inquiry_entry *e;
381 BT_DBG("cache %p, %pMR", cache, bdaddr);
383 list_for_each_entry(e, &cache->unknown, list) {
384 if (!bacmp(&e->data.bdaddr, bdaddr))
391 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
395 struct discovery_state *cache = &hdev->discovery;
396 struct inquiry_entry *e;
398 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
400 list_for_each_entry(e, &cache->resolve, list) {
401 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
403 if (!bacmp(&e->data.bdaddr, bdaddr))
410 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
411 struct inquiry_entry *ie)
413 struct discovery_state *cache = &hdev->discovery;
414 struct list_head *pos = &cache->resolve;
415 struct inquiry_entry *p;
419 list_for_each_entry(p, &cache->resolve, list) {
420 if (p->name_state != NAME_PENDING &&
421 abs(p->data.rssi) >= abs(ie->data.rssi))
426 list_add(&ie->list, pos);
429 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
430 bool name_known, bool *ssp)
432 struct discovery_state *cache = &hdev->discovery;
433 struct inquiry_entry *ie;
435 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
437 hci_remove_remote_oob_data(hdev, &data->bdaddr);
440 *ssp = data->ssp_mode;
442 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
444 if (ie->data.ssp_mode && ssp)
447 if (ie->name_state == NAME_NEEDED &&
448 data->rssi != ie->data.rssi) {
449 ie->data.rssi = data->rssi;
450 hci_inquiry_cache_update_resolve(hdev, ie);
456 /* Entry not in the cache. Add new one. */
457 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
461 list_add(&ie->all, &cache->all);
464 ie->name_state = NAME_KNOWN;
466 ie->name_state = NAME_NOT_KNOWN;
467 list_add(&ie->list, &cache->unknown);
471 if (name_known && ie->name_state != NAME_KNOWN &&
472 ie->name_state != NAME_PENDING) {
473 ie->name_state = NAME_KNOWN;
477 memcpy(&ie->data, data, sizeof(*data));
478 ie->timestamp = jiffies;
479 cache->timestamp = jiffies;
481 if (ie->name_state == NAME_NOT_KNOWN)
487 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
489 struct discovery_state *cache = &hdev->discovery;
490 struct inquiry_info *info = (struct inquiry_info *) buf;
491 struct inquiry_entry *e;
494 list_for_each_entry(e, &cache->all, all) {
495 struct inquiry_data *data = &e->data;
500 bacpy(&info->bdaddr, &data->bdaddr);
501 info->pscan_rep_mode = data->pscan_rep_mode;
502 info->pscan_period_mode = data->pscan_period_mode;
503 info->pscan_mode = data->pscan_mode;
504 memcpy(info->dev_class, data->dev_class, 3);
505 info->clock_offset = data->clock_offset;
511 BT_DBG("cache %p, copied %d", cache, copied);
515 static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
517 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
518 struct hci_cp_inquiry cp;
520 BT_DBG("%s", hdev->name);
522 if (test_bit(HCI_INQUIRY, &hdev->flags))
526 memcpy(&cp.lap, &ir->lap, 3);
527 cp.length = ir->length;
528 cp.num_rsp = ir->num_rsp;
529 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
532 int hci_inquiry(void __user *arg)
534 __u8 __user *ptr = arg;
535 struct hci_inquiry_req ir;
536 struct hci_dev *hdev;
537 int err = 0, do_inquiry = 0, max_rsp;
541 if (copy_from_user(&ir, ptr, sizeof(ir)))
544 hdev = hci_dev_get(ir.dev_id);
549 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
550 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
551 inquiry_cache_flush(hdev);
554 hci_dev_unlock(hdev);
556 timeo = ir.length * msecs_to_jiffies(2000);
559 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
564 /* for unlimited number of responses we will use buffer with
567 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
569 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
570 * copy it to the user space.
572 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
579 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
580 hci_dev_unlock(hdev);
582 BT_DBG("num_rsp %d", ir.num_rsp);
584 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
586 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
599 static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
601 u8 ad_len = 0, flags = 0;
604 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
605 flags |= LE_AD_GENERAL;
607 if (!lmp_bredr_capable(hdev))
608 flags |= LE_AD_NO_BREDR;
610 if (lmp_le_br_capable(hdev))
611 flags |= LE_AD_SIM_LE_BREDR_CTRL;
613 if (lmp_host_le_br_capable(hdev))
614 flags |= LE_AD_SIM_LE_BREDR_HOST;
617 BT_DBG("adv flags 0x%02x", flags);
627 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
629 ptr[1] = EIR_TX_POWER;
630 ptr[2] = (u8) hdev->adv_tx_power;
636 name_len = strlen(hdev->dev_name);
638 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
640 if (name_len > max_len) {
642 ptr[1] = EIR_NAME_SHORT;
644 ptr[1] = EIR_NAME_COMPLETE;
646 ptr[0] = name_len + 1;
648 memcpy(ptr + 2, hdev->dev_name, name_len);
650 ad_len += (name_len + 2);
651 ptr += (name_len + 2);
657 int hci_update_ad(struct hci_dev *hdev)
659 struct hci_cp_le_set_adv_data cp;
665 if (!lmp_le_capable(hdev)) {
670 memset(&cp, 0, sizeof(cp));
672 len = create_ad(hdev, cp.data);
674 if (hdev->adv_data_len == len &&
675 memcmp(cp.data, hdev->adv_data, len) == 0) {
680 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
681 hdev->adv_data_len = len;
684 err = hci_send_cmd(hdev, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
687 hci_dev_unlock(hdev);
692 /* ---- HCI ioctl helpers ---- */
694 int hci_dev_open(__u16 dev)
696 struct hci_dev *hdev;
699 hdev = hci_dev_get(dev);
703 BT_DBG("%s %p", hdev->name, hdev);
707 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
712 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
717 if (test_bit(HCI_UP, &hdev->flags)) {
722 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
723 set_bit(HCI_RAW, &hdev->flags);
725 /* Treat all non BR/EDR controllers as raw devices if
726 enable_hs is not set */
727 if (hdev->dev_type != HCI_BREDR && !enable_hs)
728 set_bit(HCI_RAW, &hdev->flags);
730 if (hdev->open(hdev)) {
735 if (!test_bit(HCI_RAW, &hdev->flags)) {
736 atomic_set(&hdev->cmd_cnt, 1);
737 set_bit(HCI_INIT, &hdev->flags);
738 hdev->init_last_cmd = 0;
740 ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT);
742 clear_bit(HCI_INIT, &hdev->flags);
747 set_bit(HCI_UP, &hdev->flags);
748 hci_notify(hdev, HCI_DEV_UP);
750 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
751 mgmt_valid_hdev(hdev)) {
753 mgmt_powered(hdev, 1);
754 hci_dev_unlock(hdev);
757 /* Init failed, cleanup */
758 flush_work(&hdev->tx_work);
759 flush_work(&hdev->cmd_work);
760 flush_work(&hdev->rx_work);
762 skb_queue_purge(&hdev->cmd_q);
763 skb_queue_purge(&hdev->rx_q);
768 if (hdev->sent_cmd) {
769 kfree_skb(hdev->sent_cmd);
770 hdev->sent_cmd = NULL;
778 hci_req_unlock(hdev);
783 static int hci_dev_do_close(struct hci_dev *hdev)
785 BT_DBG("%s %p", hdev->name, hdev);
787 cancel_work_sync(&hdev->le_scan);
789 cancel_delayed_work(&hdev->power_off);
791 hci_req_cancel(hdev, ENODEV);
794 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
795 del_timer_sync(&hdev->cmd_timer);
796 hci_req_unlock(hdev);
800 /* Flush RX and TX works */
801 flush_work(&hdev->tx_work);
802 flush_work(&hdev->rx_work);
804 if (hdev->discov_timeout > 0) {
805 cancel_delayed_work(&hdev->discov_off);
806 hdev->discov_timeout = 0;
807 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
810 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
811 cancel_delayed_work(&hdev->service_cache);
813 cancel_delayed_work_sync(&hdev->le_scan_disable);
816 inquiry_cache_flush(hdev);
817 hci_conn_hash_flush(hdev);
818 hci_dev_unlock(hdev);
820 hci_notify(hdev, HCI_DEV_DOWN);
826 skb_queue_purge(&hdev->cmd_q);
827 atomic_set(&hdev->cmd_cnt, 1);
828 if (!test_bit(HCI_RAW, &hdev->flags) &&
829 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
830 set_bit(HCI_INIT, &hdev->flags);
831 __hci_request(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
832 clear_bit(HCI_INIT, &hdev->flags);
836 flush_work(&hdev->cmd_work);
839 skb_queue_purge(&hdev->rx_q);
840 skb_queue_purge(&hdev->cmd_q);
841 skb_queue_purge(&hdev->raw_q);
843 /* Drop last sent command */
844 if (hdev->sent_cmd) {
845 del_timer_sync(&hdev->cmd_timer);
846 kfree_skb(hdev->sent_cmd);
847 hdev->sent_cmd = NULL;
850 /* After this point our queues are empty
851 * and no tasks are scheduled. */
854 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
855 mgmt_valid_hdev(hdev)) {
857 mgmt_powered(hdev, 0);
858 hci_dev_unlock(hdev);
864 /* Controller radio is available but is currently powered down */
865 hdev->amp_status = 0;
867 memset(hdev->eir, 0, sizeof(hdev->eir));
868 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
870 hci_req_unlock(hdev);
876 int hci_dev_close(__u16 dev)
878 struct hci_dev *hdev;
881 hdev = hci_dev_get(dev);
885 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
886 cancel_delayed_work(&hdev->power_off);
888 err = hci_dev_do_close(hdev);
894 int hci_dev_reset(__u16 dev)
896 struct hci_dev *hdev;
899 hdev = hci_dev_get(dev);
905 if (!test_bit(HCI_UP, &hdev->flags))
909 skb_queue_purge(&hdev->rx_q);
910 skb_queue_purge(&hdev->cmd_q);
913 inquiry_cache_flush(hdev);
914 hci_conn_hash_flush(hdev);
915 hci_dev_unlock(hdev);
920 atomic_set(&hdev->cmd_cnt, 1);
921 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
923 if (!test_bit(HCI_RAW, &hdev->flags))
924 ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
927 hci_req_unlock(hdev);
932 int hci_dev_reset_stat(__u16 dev)
934 struct hci_dev *hdev;
937 hdev = hci_dev_get(dev);
941 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
948 int hci_dev_cmd(unsigned int cmd, void __user *arg)
950 struct hci_dev *hdev;
951 struct hci_dev_req dr;
954 if (copy_from_user(&dr, arg, sizeof(dr)))
957 hdev = hci_dev_get(dr.dev_id);
963 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
968 if (!lmp_encrypt_capable(hdev)) {
973 if (!test_bit(HCI_AUTH, &hdev->flags)) {
974 /* Auth must be enabled first */
975 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
981 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
986 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
991 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
996 hdev->link_mode = ((__u16) dr.dev_opt) &
997 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1001 hdev->pkt_type = (__u16) dr.dev_opt;
1005 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1006 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1010 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1011 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1023 int hci_get_dev_list(void __user *arg)
1025 struct hci_dev *hdev;
1026 struct hci_dev_list_req *dl;
1027 struct hci_dev_req *dr;
1028 int n = 0, size, err;
1031 if (get_user(dev_num, (__u16 __user *) arg))
1034 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1037 size = sizeof(*dl) + dev_num * sizeof(*dr);
1039 dl = kzalloc(size, GFP_KERNEL);
1045 read_lock(&hci_dev_list_lock);
1046 list_for_each_entry(hdev, &hci_dev_list, list) {
1047 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1048 cancel_delayed_work(&hdev->power_off);
1050 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1051 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1053 (dr + n)->dev_id = hdev->id;
1054 (dr + n)->dev_opt = hdev->flags;
1059 read_unlock(&hci_dev_list_lock);
1062 size = sizeof(*dl) + n * sizeof(*dr);
1064 err = copy_to_user(arg, dl, size);
1067 return err ? -EFAULT : 0;
1070 int hci_get_dev_info(void __user *arg)
1072 struct hci_dev *hdev;
1073 struct hci_dev_info di;
1076 if (copy_from_user(&di, arg, sizeof(di)))
1079 hdev = hci_dev_get(di.dev_id);
1083 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1084 cancel_delayed_work_sync(&hdev->power_off);
1086 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1087 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1089 strcpy(di.name, hdev->name);
1090 di.bdaddr = hdev->bdaddr;
1091 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1092 di.flags = hdev->flags;
1093 di.pkt_type = hdev->pkt_type;
1094 if (lmp_bredr_capable(hdev)) {
1095 di.acl_mtu = hdev->acl_mtu;
1096 di.acl_pkts = hdev->acl_pkts;
1097 di.sco_mtu = hdev->sco_mtu;
1098 di.sco_pkts = hdev->sco_pkts;
1100 di.acl_mtu = hdev->le_mtu;
1101 di.acl_pkts = hdev->le_pkts;
1105 di.link_policy = hdev->link_policy;
1106 di.link_mode = hdev->link_mode;
1108 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1109 memcpy(&di.features, &hdev->features, sizeof(di.features));
1111 if (copy_to_user(arg, &di, sizeof(di)))
1119 /* ---- Interface to HCI drivers ---- */
1121 static int hci_rfkill_set_block(void *data, bool blocked)
1123 struct hci_dev *hdev = data;
1125 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1130 hci_dev_do_close(hdev);
1135 static const struct rfkill_ops hci_rfkill_ops = {
1136 .set_block = hci_rfkill_set_block,
1139 static void hci_power_on(struct work_struct *work)
1141 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1143 BT_DBG("%s", hdev->name);
1145 if (hci_dev_open(hdev->id) < 0)
1148 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1149 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1150 HCI_AUTO_OFF_TIMEOUT);
1152 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1153 mgmt_index_added(hdev);
1156 static void hci_power_off(struct work_struct *work)
1158 struct hci_dev *hdev = container_of(work, struct hci_dev,
1161 BT_DBG("%s", hdev->name);
1163 hci_dev_do_close(hdev);
1166 static void hci_discov_off(struct work_struct *work)
1168 struct hci_dev *hdev;
1169 u8 scan = SCAN_PAGE;
1171 hdev = container_of(work, struct hci_dev, discov_off.work);
1173 BT_DBG("%s", hdev->name);
1177 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1179 hdev->discov_timeout = 0;
1181 hci_dev_unlock(hdev);
1184 int hci_uuids_clear(struct hci_dev *hdev)
1186 struct list_head *p, *n;
1188 list_for_each_safe(p, n, &hdev->uuids) {
1189 struct bt_uuid *uuid;
1191 uuid = list_entry(p, struct bt_uuid, list);
1200 int hci_link_keys_clear(struct hci_dev *hdev)
1202 struct list_head *p, *n;
1204 list_for_each_safe(p, n, &hdev->link_keys) {
1205 struct link_key *key;
1207 key = list_entry(p, struct link_key, list);
1216 int hci_smp_ltks_clear(struct hci_dev *hdev)
1218 struct smp_ltk *k, *tmp;
1220 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1228 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1232 list_for_each_entry(k, &hdev->link_keys, list)
1233 if (bacmp(bdaddr, &k->bdaddr) == 0)
1239 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1240 u8 key_type, u8 old_key_type)
1243 if (key_type < 0x03)
1246 /* Debug keys are insecure so don't store them persistently */
1247 if (key_type == HCI_LK_DEBUG_COMBINATION)
1250 /* Changed combination key and there's no previous one */
1251 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1254 /* Security mode 3 case */
1258 /* Neither local nor remote side had no-bonding as requirement */
1259 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1262 /* Local side had dedicated bonding as requirement */
1263 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1266 /* Remote side had dedicated bonding as requirement */
1267 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1270 /* If none of the above criteria match, then don't store the key
1275 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1279 list_for_each_entry(k, &hdev->long_term_keys, list) {
1280 if (k->ediv != ediv ||
1281 memcmp(rand, k->rand, sizeof(k->rand)))
1290 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1295 list_for_each_entry(k, &hdev->long_term_keys, list)
1296 if (addr_type == k->bdaddr_type &&
1297 bacmp(bdaddr, &k->bdaddr) == 0)
1303 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1304 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1306 struct link_key *key, *old_key;
1310 old_key = hci_find_link_key(hdev, bdaddr);
1312 old_key_type = old_key->type;
1315 old_key_type = conn ? conn->key_type : 0xff;
1316 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1319 list_add(&key->list, &hdev->link_keys);
1322 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1324 /* Some buggy controller combinations generate a changed
1325 * combination key for legacy pairing even when there's no
1327 if (type == HCI_LK_CHANGED_COMBINATION &&
1328 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1329 type = HCI_LK_COMBINATION;
1331 conn->key_type = type;
1334 bacpy(&key->bdaddr, bdaddr);
1335 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1336 key->pin_len = pin_len;
1338 if (type == HCI_LK_CHANGED_COMBINATION)
1339 key->type = old_key_type;
1346 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1348 mgmt_new_link_key(hdev, key, persistent);
1351 conn->flush_key = !persistent;
1356 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1357 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
1360 struct smp_ltk *key, *old_key;
1362 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1365 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1369 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1372 list_add(&key->list, &hdev->long_term_keys);
1375 bacpy(&key->bdaddr, bdaddr);
1376 key->bdaddr_type = addr_type;
1377 memcpy(key->val, tk, sizeof(key->val));
1378 key->authenticated = authenticated;
1380 key->enc_size = enc_size;
1382 memcpy(key->rand, rand, sizeof(key->rand));
1387 if (type & HCI_SMP_LTK)
1388 mgmt_new_ltk(hdev, key, 1);
1393 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1395 struct link_key *key;
1397 key = hci_find_link_key(hdev, bdaddr);
1401 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1403 list_del(&key->list);
1409 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1411 struct smp_ltk *k, *tmp;
1413 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1414 if (bacmp(bdaddr, &k->bdaddr))
1417 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1426 /* HCI command timer function */
1427 static void hci_cmd_timeout(unsigned long arg)
1429 struct hci_dev *hdev = (void *) arg;
1431 if (hdev->sent_cmd) {
1432 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1433 u16 opcode = __le16_to_cpu(sent->opcode);
1435 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1437 BT_ERR("%s command tx timeout", hdev->name);
1440 atomic_set(&hdev->cmd_cnt, 1);
1441 queue_work(hdev->workqueue, &hdev->cmd_work);
1444 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1447 struct oob_data *data;
1449 list_for_each_entry(data, &hdev->remote_oob_data, list)
1450 if (bacmp(bdaddr, &data->bdaddr) == 0)
1456 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1458 struct oob_data *data;
1460 data = hci_find_remote_oob_data(hdev, bdaddr);
1464 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1466 list_del(&data->list);
1472 int hci_remote_oob_data_clear(struct hci_dev *hdev)
1474 struct oob_data *data, *n;
1476 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1477 list_del(&data->list);
1484 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1487 struct oob_data *data;
1489 data = hci_find_remote_oob_data(hdev, bdaddr);
1492 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1496 bacpy(&data->bdaddr, bdaddr);
1497 list_add(&data->list, &hdev->remote_oob_data);
1500 memcpy(data->hash, hash, sizeof(data->hash));
1501 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1503 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1508 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1510 struct bdaddr_list *b;
1512 list_for_each_entry(b, &hdev->blacklist, list)
1513 if (bacmp(bdaddr, &b->bdaddr) == 0)
1519 int hci_blacklist_clear(struct hci_dev *hdev)
1521 struct list_head *p, *n;
1523 list_for_each_safe(p, n, &hdev->blacklist) {
1524 struct bdaddr_list *b;
1526 b = list_entry(p, struct bdaddr_list, list);
1535 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1537 struct bdaddr_list *entry;
1539 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1542 if (hci_blacklist_lookup(hdev, bdaddr))
1545 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1549 bacpy(&entry->bdaddr, bdaddr);
1551 list_add(&entry->list, &hdev->blacklist);
1553 return mgmt_device_blocked(hdev, bdaddr, type);
1556 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1558 struct bdaddr_list *entry;
1560 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1561 return hci_blacklist_clear(hdev);
1563 entry = hci_blacklist_lookup(hdev, bdaddr);
1567 list_del(&entry->list);
1570 return mgmt_device_unblocked(hdev, bdaddr, type);
1573 static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1575 struct le_scan_params *param = (struct le_scan_params *) opt;
1576 struct hci_cp_le_set_scan_param cp;
1578 memset(&cp, 0, sizeof(cp));
1579 cp.type = param->type;
1580 cp.interval = cpu_to_le16(param->interval);
1581 cp.window = cpu_to_le16(param->window);
1583 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1586 static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1588 struct hci_cp_le_set_scan_enable cp;
1590 memset(&cp, 0, sizeof(cp));
1594 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1597 static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
1598 u16 window, int timeout)
1600 long timeo = msecs_to_jiffies(3000);
1601 struct le_scan_params param;
1604 BT_DBG("%s", hdev->name);
1606 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1607 return -EINPROGRESS;
1610 param.interval = interval;
1611 param.window = window;
1615 err = __hci_request(hdev, le_scan_param_req, (unsigned long) ¶m,
1618 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1620 hci_req_unlock(hdev);
1625 schedule_delayed_work(&hdev->le_scan_disable,
1626 msecs_to_jiffies(timeout));
1631 int hci_cancel_le_scan(struct hci_dev *hdev)
1633 BT_DBG("%s", hdev->name);
1635 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1638 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1639 struct hci_cp_le_set_scan_enable cp;
1641 /* Send HCI command to disable LE Scan */
1642 memset(&cp, 0, sizeof(cp));
1643 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1649 static void le_scan_disable_work(struct work_struct *work)
1651 struct hci_dev *hdev = container_of(work, struct hci_dev,
1652 le_scan_disable.work);
1653 struct hci_cp_le_set_scan_enable cp;
1655 BT_DBG("%s", hdev->name);
1657 memset(&cp, 0, sizeof(cp));
1659 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1662 static void le_scan_work(struct work_struct *work)
1664 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1665 struct le_scan_params *param = &hdev->le_scan_params;
1667 BT_DBG("%s", hdev->name);
1669 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1673 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
1676 struct le_scan_params *param = &hdev->le_scan_params;
1678 BT_DBG("%s", hdev->name);
1680 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1683 if (work_busy(&hdev->le_scan))
1684 return -EINPROGRESS;
1687 param->interval = interval;
1688 param->window = window;
1689 param->timeout = timeout;
1691 queue_work(system_long_wq, &hdev->le_scan);
1696 /* Alloc HCI device */
1697 struct hci_dev *hci_alloc_dev(void)
1699 struct hci_dev *hdev;
1701 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1705 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1706 hdev->esco_type = (ESCO_HV1);
1707 hdev->link_mode = (HCI_LM_ACCEPT);
1708 hdev->io_capability = 0x03; /* No Input No Output */
1709 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
1710 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
1712 hdev->sniff_max_interval = 800;
1713 hdev->sniff_min_interval = 80;
1715 mutex_init(&hdev->lock);
1716 mutex_init(&hdev->req_lock);
1718 INIT_LIST_HEAD(&hdev->mgmt_pending);
1719 INIT_LIST_HEAD(&hdev->blacklist);
1720 INIT_LIST_HEAD(&hdev->uuids);
1721 INIT_LIST_HEAD(&hdev->link_keys);
1722 INIT_LIST_HEAD(&hdev->long_term_keys);
1723 INIT_LIST_HEAD(&hdev->remote_oob_data);
1724 INIT_LIST_HEAD(&hdev->conn_hash.list);
1726 INIT_WORK(&hdev->rx_work, hci_rx_work);
1727 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1728 INIT_WORK(&hdev->tx_work, hci_tx_work);
1729 INIT_WORK(&hdev->power_on, hci_power_on);
1730 INIT_WORK(&hdev->le_scan, le_scan_work);
1732 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1733 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1734 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1736 skb_queue_head_init(&hdev->driver_init);
1737 skb_queue_head_init(&hdev->rx_q);
1738 skb_queue_head_init(&hdev->cmd_q);
1739 skb_queue_head_init(&hdev->raw_q);
1741 init_waitqueue_head(&hdev->req_wait_q);
1743 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
1745 hci_init_sysfs(hdev);
1746 discovery_init(hdev);
1750 EXPORT_SYMBOL(hci_alloc_dev);
1752 /* Free HCI device */
1753 void hci_free_dev(struct hci_dev *hdev)
1755 skb_queue_purge(&hdev->driver_init);
1757 /* will free via device release */
1758 put_device(&hdev->dev);
1760 EXPORT_SYMBOL(hci_free_dev);
1762 /* Register HCI device */
1763 int hci_register_dev(struct hci_dev *hdev)
1767 if (!hdev->open || !hdev->close)
1770 /* Do not allow HCI_AMP devices to register at index 0,
1771 * so the index can be used as the AMP controller ID.
1773 switch (hdev->dev_type) {
1775 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
1778 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
1787 sprintf(hdev->name, "hci%d", id);
1790 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1792 write_lock(&hci_dev_list_lock);
1793 list_add(&hdev->list, &hci_dev_list);
1794 write_unlock(&hci_dev_list_lock);
1796 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1798 if (!hdev->workqueue) {
1803 hdev->req_workqueue = alloc_workqueue(hdev->name,
1804 WQ_HIGHPRI | WQ_UNBOUND |
1806 if (!hdev->req_workqueue) {
1807 destroy_workqueue(hdev->workqueue);
1812 error = hci_add_sysfs(hdev);
1816 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1817 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
1820 if (rfkill_register(hdev->rfkill) < 0) {
1821 rfkill_destroy(hdev->rfkill);
1822 hdev->rfkill = NULL;
1826 set_bit(HCI_SETUP, &hdev->dev_flags);
1828 if (hdev->dev_type != HCI_AMP)
1829 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1831 hci_notify(hdev, HCI_DEV_REG);
1834 queue_work(hdev->req_workqueue, &hdev->power_on);
1839 destroy_workqueue(hdev->workqueue);
1840 destroy_workqueue(hdev->req_workqueue);
1842 ida_simple_remove(&hci_index_ida, hdev->id);
1843 write_lock(&hci_dev_list_lock);
1844 list_del(&hdev->list);
1845 write_unlock(&hci_dev_list_lock);
1849 EXPORT_SYMBOL(hci_register_dev);
1851 /* Unregister HCI device */
1852 void hci_unregister_dev(struct hci_dev *hdev)
1856 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1858 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1862 write_lock(&hci_dev_list_lock);
1863 list_del(&hdev->list);
1864 write_unlock(&hci_dev_list_lock);
1866 hci_dev_do_close(hdev);
1868 for (i = 0; i < NUM_REASSEMBLY; i++)
1869 kfree_skb(hdev->reassembly[i]);
1871 cancel_work_sync(&hdev->power_on);
1873 if (!test_bit(HCI_INIT, &hdev->flags) &&
1874 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
1876 mgmt_index_removed(hdev);
1877 hci_dev_unlock(hdev);
1880 /* mgmt_index_removed should take care of emptying the
1882 BUG_ON(!list_empty(&hdev->mgmt_pending));
1884 hci_notify(hdev, HCI_DEV_UNREG);
1887 rfkill_unregister(hdev->rfkill);
1888 rfkill_destroy(hdev->rfkill);
1891 hci_del_sysfs(hdev);
1893 destroy_workqueue(hdev->workqueue);
1894 destroy_workqueue(hdev->req_workqueue);
1897 hci_blacklist_clear(hdev);
1898 hci_uuids_clear(hdev);
1899 hci_link_keys_clear(hdev);
1900 hci_smp_ltks_clear(hdev);
1901 hci_remote_oob_data_clear(hdev);
1902 hci_dev_unlock(hdev);
1906 ida_simple_remove(&hci_index_ida, id);
1908 EXPORT_SYMBOL(hci_unregister_dev);
1910 /* Suspend HCI device */
1911 int hci_suspend_dev(struct hci_dev *hdev)
1913 hci_notify(hdev, HCI_DEV_SUSPEND);
1916 EXPORT_SYMBOL(hci_suspend_dev);
1918 /* Resume HCI device */
1919 int hci_resume_dev(struct hci_dev *hdev)
1921 hci_notify(hdev, HCI_DEV_RESUME);
1924 EXPORT_SYMBOL(hci_resume_dev);
1926 /* Receive frame from HCI drivers */
1927 int hci_recv_frame(struct sk_buff *skb)
1929 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1930 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1931 && !test_bit(HCI_INIT, &hdev->flags))) {
1937 bt_cb(skb)->incoming = 1;
1940 __net_timestamp(skb);
1942 skb_queue_tail(&hdev->rx_q, skb);
1943 queue_work(hdev->workqueue, &hdev->rx_work);
1947 EXPORT_SYMBOL(hci_recv_frame);
1949 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1950 int count, __u8 index)
1955 struct sk_buff *skb;
1956 struct bt_skb_cb *scb;
1958 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1959 index >= NUM_REASSEMBLY)
1962 skb = hdev->reassembly[index];
1966 case HCI_ACLDATA_PKT:
1967 len = HCI_MAX_FRAME_SIZE;
1968 hlen = HCI_ACL_HDR_SIZE;
1971 len = HCI_MAX_EVENT_SIZE;
1972 hlen = HCI_EVENT_HDR_SIZE;
1974 case HCI_SCODATA_PKT:
1975 len = HCI_MAX_SCO_SIZE;
1976 hlen = HCI_SCO_HDR_SIZE;
1980 skb = bt_skb_alloc(len, GFP_ATOMIC);
1984 scb = (void *) skb->cb;
1986 scb->pkt_type = type;
1988 skb->dev = (void *) hdev;
1989 hdev->reassembly[index] = skb;
1993 scb = (void *) skb->cb;
1994 len = min_t(uint, scb->expect, count);
1996 memcpy(skb_put(skb, len), data, len);
2005 if (skb->len == HCI_EVENT_HDR_SIZE) {
2006 struct hci_event_hdr *h = hci_event_hdr(skb);
2007 scb->expect = h->plen;
2009 if (skb_tailroom(skb) < scb->expect) {
2011 hdev->reassembly[index] = NULL;
2017 case HCI_ACLDATA_PKT:
2018 if (skb->len == HCI_ACL_HDR_SIZE) {
2019 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2020 scb->expect = __le16_to_cpu(h->dlen);
2022 if (skb_tailroom(skb) < scb->expect) {
2024 hdev->reassembly[index] = NULL;
2030 case HCI_SCODATA_PKT:
2031 if (skb->len == HCI_SCO_HDR_SIZE) {
2032 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2033 scb->expect = h->dlen;
2035 if (skb_tailroom(skb) < scb->expect) {
2037 hdev->reassembly[index] = NULL;
2044 if (scb->expect == 0) {
2045 /* Complete frame */
2047 bt_cb(skb)->pkt_type = type;
2048 hci_recv_frame(skb);
2050 hdev->reassembly[index] = NULL;
2058 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2062 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2066 rem = hci_reassembly(hdev, type, data, count, type - 1);
2070 data += (count - rem);
2076 EXPORT_SYMBOL(hci_recv_fragment);
2078 #define STREAM_REASSEMBLY 0
2080 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2086 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2089 struct { char type; } *pkt;
2091 /* Start of the frame */
2098 type = bt_cb(skb)->pkt_type;
2100 rem = hci_reassembly(hdev, type, data, count,
2105 data += (count - rem);
2111 EXPORT_SYMBOL(hci_recv_stream_fragment);
2113 /* ---- Interface to upper protocols ---- */
2115 int hci_register_cb(struct hci_cb *cb)
2117 BT_DBG("%p name %s", cb, cb->name);
2119 write_lock(&hci_cb_list_lock);
2120 list_add(&cb->list, &hci_cb_list);
2121 write_unlock(&hci_cb_list_lock);
2125 EXPORT_SYMBOL(hci_register_cb);
2127 int hci_unregister_cb(struct hci_cb *cb)
2129 BT_DBG("%p name %s", cb, cb->name);
2131 write_lock(&hci_cb_list_lock);
2132 list_del(&cb->list);
2133 write_unlock(&hci_cb_list_lock);
2137 EXPORT_SYMBOL(hci_unregister_cb);
2139 static int hci_send_frame(struct sk_buff *skb)
2141 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2148 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2151 __net_timestamp(skb);
2153 /* Send copy to monitor */
2154 hci_send_to_monitor(hdev, skb);
2156 if (atomic_read(&hdev->promisc)) {
2157 /* Send copy to the sockets */
2158 hci_send_to_sock(hdev, skb);
2161 /* Get rid of skb owner, prior to sending to the driver. */
2164 return hdev->send(skb);
2167 /* Send HCI command */
2168 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
2170 int len = HCI_COMMAND_HDR_SIZE + plen;
2171 struct hci_command_hdr *hdr;
2172 struct sk_buff *skb;
2174 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2176 skb = bt_skb_alloc(len, GFP_ATOMIC);
2178 BT_ERR("%s no memory for command", hdev->name);
2182 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2183 hdr->opcode = cpu_to_le16(opcode);
2187 memcpy(skb_put(skb, plen), param, plen);
2189 BT_DBG("skb len %d", skb->len);
2191 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2192 skb->dev = (void *) hdev;
2194 if (test_bit(HCI_INIT, &hdev->flags))
2195 hdev->init_last_cmd = opcode;
2197 skb_queue_tail(&hdev->cmd_q, skb);
2198 queue_work(hdev->workqueue, &hdev->cmd_work);
2203 /* Get data from the previously sent command */
2204 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2206 struct hci_command_hdr *hdr;
2208 if (!hdev->sent_cmd)
2211 hdr = (void *) hdev->sent_cmd->data;
2213 if (hdr->opcode != cpu_to_le16(opcode))
2216 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
2218 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2222 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2224 struct hci_acl_hdr *hdr;
2227 skb_push(skb, HCI_ACL_HDR_SIZE);
2228 skb_reset_transport_header(skb);
2229 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2230 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2231 hdr->dlen = cpu_to_le16(len);
2234 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
2235 struct sk_buff *skb, __u16 flags)
2237 struct hci_conn *conn = chan->conn;
2238 struct hci_dev *hdev = conn->hdev;
2239 struct sk_buff *list;
2241 skb->len = skb_headlen(skb);
2244 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2246 switch (hdev->dev_type) {
2248 hci_add_acl_hdr(skb, conn->handle, flags);
2251 hci_add_acl_hdr(skb, chan->handle, flags);
2254 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2258 list = skb_shinfo(skb)->frag_list;
2260 /* Non fragmented */
2261 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2263 skb_queue_tail(queue, skb);
2266 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2268 skb_shinfo(skb)->frag_list = NULL;
2270 /* Queue all fragments atomically */
2271 spin_lock(&queue->lock);
2273 __skb_queue_tail(queue, skb);
2275 flags &= ~ACL_START;
2278 skb = list; list = list->next;
2280 skb->dev = (void *) hdev;
2281 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2282 hci_add_acl_hdr(skb, conn->handle, flags);
2284 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2286 __skb_queue_tail(queue, skb);
2289 spin_unlock(&queue->lock);
2293 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2295 struct hci_dev *hdev = chan->conn->hdev;
2297 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
2299 skb->dev = (void *) hdev;
2301 hci_queue_acl(chan, &chan->data_q, skb, flags);
2303 queue_work(hdev->workqueue, &hdev->tx_work);
2307 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2309 struct hci_dev *hdev = conn->hdev;
2310 struct hci_sco_hdr hdr;
2312 BT_DBG("%s len %d", hdev->name, skb->len);
2314 hdr.handle = cpu_to_le16(conn->handle);
2315 hdr.dlen = skb->len;
2317 skb_push(skb, HCI_SCO_HDR_SIZE);
2318 skb_reset_transport_header(skb);
2319 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2321 skb->dev = (void *) hdev;
2322 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2324 skb_queue_tail(&conn->data_q, skb);
2325 queue_work(hdev->workqueue, &hdev->tx_work);
2328 /* ---- HCI TX task (outgoing data) ---- */
2330 /* HCI Connection scheduler */
2331 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2334 struct hci_conn_hash *h = &hdev->conn_hash;
2335 struct hci_conn *conn = NULL, *c;
2336 unsigned int num = 0, min = ~0;
2338 /* We don't have to lock device here. Connections are always
2339 * added and removed with TX task disabled. */
2343 list_for_each_entry_rcu(c, &h->list, list) {
2344 if (c->type != type || skb_queue_empty(&c->data_q))
2347 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2352 if (c->sent < min) {
2357 if (hci_conn_num(hdev, type) == num)
2366 switch (conn->type) {
2368 cnt = hdev->acl_cnt;
2372 cnt = hdev->sco_cnt;
2375 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2379 BT_ERR("Unknown link type");
2387 BT_DBG("conn %p quote %d", conn, *quote);
2391 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2393 struct hci_conn_hash *h = &hdev->conn_hash;
2396 BT_ERR("%s link tx timeout", hdev->name);
2400 /* Kill stalled connections */
2401 list_for_each_entry_rcu(c, &h->list, list) {
2402 if (c->type == type && c->sent) {
2403 BT_ERR("%s killing stalled connection %pMR",
2404 hdev->name, &c->dst);
2405 hci_acl_disconn(c, HCI_ERROR_REMOTE_USER_TERM);
2412 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2415 struct hci_conn_hash *h = &hdev->conn_hash;
2416 struct hci_chan *chan = NULL;
2417 unsigned int num = 0, min = ~0, cur_prio = 0;
2418 struct hci_conn *conn;
2419 int cnt, q, conn_num = 0;
2421 BT_DBG("%s", hdev->name);
2425 list_for_each_entry_rcu(conn, &h->list, list) {
2426 struct hci_chan *tmp;
2428 if (conn->type != type)
2431 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2436 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2437 struct sk_buff *skb;
2439 if (skb_queue_empty(&tmp->data_q))
2442 skb = skb_peek(&tmp->data_q);
2443 if (skb->priority < cur_prio)
2446 if (skb->priority > cur_prio) {
2449 cur_prio = skb->priority;
2454 if (conn->sent < min) {
2460 if (hci_conn_num(hdev, type) == conn_num)
2469 switch (chan->conn->type) {
2471 cnt = hdev->acl_cnt;
2474 cnt = hdev->block_cnt;
2478 cnt = hdev->sco_cnt;
2481 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2485 BT_ERR("Unknown link type");
2490 BT_DBG("chan %p quote %d", chan, *quote);
2494 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2496 struct hci_conn_hash *h = &hdev->conn_hash;
2497 struct hci_conn *conn;
2500 BT_DBG("%s", hdev->name);
2504 list_for_each_entry_rcu(conn, &h->list, list) {
2505 struct hci_chan *chan;
2507 if (conn->type != type)
2510 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2515 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
2516 struct sk_buff *skb;
2523 if (skb_queue_empty(&chan->data_q))
2526 skb = skb_peek(&chan->data_q);
2527 if (skb->priority >= HCI_PRIO_MAX - 1)
2530 skb->priority = HCI_PRIO_MAX - 1;
2532 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2536 if (hci_conn_num(hdev, type) == num)
2544 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2546 /* Calculate count of blocks used by this packet */
2547 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2550 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
2552 if (!test_bit(HCI_RAW, &hdev->flags)) {
2553 /* ACL tx timeout must be longer than maximum
2554 * link supervision timeout (40.9 seconds) */
2555 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
2556 HCI_ACL_TX_TIMEOUT))
2557 hci_link_tx_to(hdev, ACL_LINK);
2561 static void hci_sched_acl_pkt(struct hci_dev *hdev)
2563 unsigned int cnt = hdev->acl_cnt;
2564 struct hci_chan *chan;
2565 struct sk_buff *skb;
2568 __check_timeout(hdev, cnt);
2570 while (hdev->acl_cnt &&
2571 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
2572 u32 priority = (skb_peek(&chan->data_q))->priority;
2573 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2574 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2575 skb->len, skb->priority);
2577 /* Stop if priority has changed */
2578 if (skb->priority < priority)
2581 skb = skb_dequeue(&chan->data_q);
2583 hci_conn_enter_active_mode(chan->conn,
2584 bt_cb(skb)->force_active);
2586 hci_send_frame(skb);
2587 hdev->acl_last_tx = jiffies;
2595 if (cnt != hdev->acl_cnt)
2596 hci_prio_recalculate(hdev, ACL_LINK);
2599 static void hci_sched_acl_blk(struct hci_dev *hdev)
2601 unsigned int cnt = hdev->block_cnt;
2602 struct hci_chan *chan;
2603 struct sk_buff *skb;
2607 __check_timeout(hdev, cnt);
2609 BT_DBG("%s", hdev->name);
2611 if (hdev->dev_type == HCI_AMP)
2616 while (hdev->block_cnt > 0 &&
2617 (chan = hci_chan_sent(hdev, type, "e))) {
2618 u32 priority = (skb_peek(&chan->data_q))->priority;
2619 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2622 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2623 skb->len, skb->priority);
2625 /* Stop if priority has changed */
2626 if (skb->priority < priority)
2629 skb = skb_dequeue(&chan->data_q);
2631 blocks = __get_blocks(hdev, skb);
2632 if (blocks > hdev->block_cnt)
2635 hci_conn_enter_active_mode(chan->conn,
2636 bt_cb(skb)->force_active);
2638 hci_send_frame(skb);
2639 hdev->acl_last_tx = jiffies;
2641 hdev->block_cnt -= blocks;
2644 chan->sent += blocks;
2645 chan->conn->sent += blocks;
2649 if (cnt != hdev->block_cnt)
2650 hci_prio_recalculate(hdev, type);
2653 static void hci_sched_acl(struct hci_dev *hdev)
2655 BT_DBG("%s", hdev->name);
2657 /* No ACL link over BR/EDR controller */
2658 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
2661 /* No AMP link over AMP controller */
2662 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
2665 switch (hdev->flow_ctl_mode) {
2666 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2667 hci_sched_acl_pkt(hdev);
2670 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2671 hci_sched_acl_blk(hdev);
2677 static void hci_sched_sco(struct hci_dev *hdev)
2679 struct hci_conn *conn;
2680 struct sk_buff *skb;
2683 BT_DBG("%s", hdev->name);
2685 if (!hci_conn_num(hdev, SCO_LINK))
2688 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
2689 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2690 BT_DBG("skb %p len %d", skb, skb->len);
2691 hci_send_frame(skb);
2694 if (conn->sent == ~0)
2700 static void hci_sched_esco(struct hci_dev *hdev)
2702 struct hci_conn *conn;
2703 struct sk_buff *skb;
2706 BT_DBG("%s", hdev->name);
2708 if (!hci_conn_num(hdev, ESCO_LINK))
2711 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
2713 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2714 BT_DBG("skb %p len %d", skb, skb->len);
2715 hci_send_frame(skb);
2718 if (conn->sent == ~0)
2724 static void hci_sched_le(struct hci_dev *hdev)
2726 struct hci_chan *chan;
2727 struct sk_buff *skb;
2728 int quote, cnt, tmp;
2730 BT_DBG("%s", hdev->name);
2732 if (!hci_conn_num(hdev, LE_LINK))
2735 if (!test_bit(HCI_RAW, &hdev->flags)) {
2736 /* LE tx timeout must be longer than maximum
2737 * link supervision timeout (40.9 seconds) */
2738 if (!hdev->le_cnt && hdev->le_pkts &&
2739 time_after(jiffies, hdev->le_last_tx + HZ * 45))
2740 hci_link_tx_to(hdev, LE_LINK);
2743 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
2745 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
2746 u32 priority = (skb_peek(&chan->data_q))->priority;
2747 while (quote-- && (skb = skb_peek(&chan->data_q))) {
2748 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2749 skb->len, skb->priority);
2751 /* Stop if priority has changed */
2752 if (skb->priority < priority)
2755 skb = skb_dequeue(&chan->data_q);
2757 hci_send_frame(skb);
2758 hdev->le_last_tx = jiffies;
2769 hdev->acl_cnt = cnt;
2772 hci_prio_recalculate(hdev, LE_LINK);
2775 static void hci_tx_work(struct work_struct *work)
2777 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
2778 struct sk_buff *skb;
2780 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2781 hdev->sco_cnt, hdev->le_cnt);
2783 /* Schedule queues and send stuff to HCI driver */
2785 hci_sched_acl(hdev);
2787 hci_sched_sco(hdev);
2789 hci_sched_esco(hdev);
2793 /* Send next queued raw (unknown type) packet */
2794 while ((skb = skb_dequeue(&hdev->raw_q)))
2795 hci_send_frame(skb);
2798 /* ----- HCI RX task (incoming data processing) ----- */
2800 /* ACL data packet */
2801 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2803 struct hci_acl_hdr *hdr = (void *) skb->data;
2804 struct hci_conn *conn;
2805 __u16 handle, flags;
2807 skb_pull(skb, HCI_ACL_HDR_SIZE);
2809 handle = __le16_to_cpu(hdr->handle);
2810 flags = hci_flags(handle);
2811 handle = hci_handle(handle);
2813 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
2816 hdev->stat.acl_rx++;
2819 conn = hci_conn_hash_lookup_handle(hdev, handle);
2820 hci_dev_unlock(hdev);
2823 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
2826 if (test_bit(HCI_MGMT, &hdev->dev_flags) &&
2827 !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags))
2828 mgmt_device_connected(hdev, &conn->dst, conn->type,
2829 conn->dst_type, 0, NULL, 0,
2831 hci_dev_unlock(hdev);
2833 /* Send to upper protocol */
2834 l2cap_recv_acldata(conn, skb, flags);
2837 BT_ERR("%s ACL packet for unknown connection handle %d",
2838 hdev->name, handle);
2844 /* SCO data packet */
2845 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2847 struct hci_sco_hdr *hdr = (void *) skb->data;
2848 struct hci_conn *conn;
2851 skb_pull(skb, HCI_SCO_HDR_SIZE);
2853 handle = __le16_to_cpu(hdr->handle);
2855 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
2857 hdev->stat.sco_rx++;
2860 conn = hci_conn_hash_lookup_handle(hdev, handle);
2861 hci_dev_unlock(hdev);
2864 /* Send to upper protocol */
2865 sco_recv_scodata(conn, skb);
2868 BT_ERR("%s SCO packet for unknown connection handle %d",
2869 hdev->name, handle);
2875 static void hci_rx_work(struct work_struct *work)
2877 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
2878 struct sk_buff *skb;
2880 BT_DBG("%s", hdev->name);
2882 while ((skb = skb_dequeue(&hdev->rx_q))) {
2883 /* Send copy to monitor */
2884 hci_send_to_monitor(hdev, skb);
2886 if (atomic_read(&hdev->promisc)) {
2887 /* Send copy to the sockets */
2888 hci_send_to_sock(hdev, skb);
2891 if (test_bit(HCI_RAW, &hdev->flags)) {
2896 if (test_bit(HCI_INIT, &hdev->flags)) {
2897 /* Don't process data packets in this states. */
2898 switch (bt_cb(skb)->pkt_type) {
2899 case HCI_ACLDATA_PKT:
2900 case HCI_SCODATA_PKT:
2907 switch (bt_cb(skb)->pkt_type) {
2909 BT_DBG("%s Event packet", hdev->name);
2910 hci_event_packet(hdev, skb);
2913 case HCI_ACLDATA_PKT:
2914 BT_DBG("%s ACL data packet", hdev->name);
2915 hci_acldata_packet(hdev, skb);
2918 case HCI_SCODATA_PKT:
2919 BT_DBG("%s SCO data packet", hdev->name);
2920 hci_scodata_packet(hdev, skb);
2930 static void hci_cmd_work(struct work_struct *work)
2932 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
2933 struct sk_buff *skb;
2935 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
2936 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
2938 /* Send queued commands */
2939 if (atomic_read(&hdev->cmd_cnt)) {
2940 skb = skb_dequeue(&hdev->cmd_q);
2944 kfree_skb(hdev->sent_cmd);
2946 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2947 if (hdev->sent_cmd) {
2948 atomic_dec(&hdev->cmd_cnt);
2949 hci_send_frame(skb);
2950 if (test_bit(HCI_RESET, &hdev->flags))
2951 del_timer(&hdev->cmd_timer);
2953 mod_timer(&hdev->cmd_timer,
2954 jiffies + HCI_CMD_TIMEOUT);
2956 skb_queue_head(&hdev->cmd_q, skb);
2957 queue_work(hdev->workqueue, &hdev->cmd_work);
2962 int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2964 /* General inquiry access code (GIAC) */
2965 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2966 struct hci_cp_inquiry cp;
2968 BT_DBG("%s", hdev->name);
2970 if (test_bit(HCI_INQUIRY, &hdev->flags))
2971 return -EINPROGRESS;
2973 inquiry_cache_flush(hdev);
2975 memset(&cp, 0, sizeof(cp));
2976 memcpy(&cp.lap, lap, sizeof(cp.lap));
2979 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2982 int hci_cancel_inquiry(struct hci_dev *hdev)
2984 BT_DBG("%s", hdev->name);
2986 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2989 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2992 u8 bdaddr_to_le(u8 bdaddr_type)
2994 switch (bdaddr_type) {
2995 case BDADDR_LE_PUBLIC:
2996 return ADDR_LE_DEV_PUBLIC;
2999 /* Fallback to LE Random address type */
3000 return ADDR_LE_DEV_RANDOM;