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 static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
62 BT_DBG("%s result 0x%2.2x", hdev->name, result);
64 if (hdev->req_status == HCI_REQ_PEND) {
65 hdev->req_result = result;
66 hdev->req_status = HCI_REQ_DONE;
67 wake_up_interruptible(&hdev->req_wait_q);
71 static void hci_req_cancel(struct hci_dev *hdev, int err)
73 BT_DBG("%s err 0x%2.2x", hdev->name, err);
75 if (hdev->req_status == HCI_REQ_PEND) {
76 hdev->req_result = err;
77 hdev->req_status = HCI_REQ_CANCELED;
78 wake_up_interruptible(&hdev->req_wait_q);
82 static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
85 struct hci_ev_cmd_complete *ev;
86 struct hci_event_hdr *hdr;
92 hdev->recv_evt = NULL;
97 return ERR_PTR(-ENODATA);
99 if (skb->len < sizeof(*hdr)) {
100 BT_ERR("Too short HCI event");
104 hdr = (void *) skb->data;
105 skb_pull(skb, HCI_EVENT_HDR_SIZE);
108 if (hdr->evt != event)
113 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
114 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
118 if (skb->len < sizeof(*ev)) {
119 BT_ERR("Too short cmd_complete event");
123 ev = (void *) skb->data;
124 skb_pull(skb, sizeof(*ev));
126 if (opcode == __le16_to_cpu(ev->opcode))
129 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
130 __le16_to_cpu(ev->opcode));
134 return ERR_PTR(-ENODATA);
137 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
138 const void *param, u8 event, u32 timeout)
140 DECLARE_WAITQUEUE(wait, current);
141 struct hci_request req;
144 BT_DBG("%s", hdev->name);
146 hci_req_init(&req, hdev);
148 hci_req_add_ev(&req, opcode, plen, param, event);
150 hdev->req_status = HCI_REQ_PEND;
152 err = hci_req_run(&req, hci_req_sync_complete);
156 add_wait_queue(&hdev->req_wait_q, &wait);
157 set_current_state(TASK_INTERRUPTIBLE);
159 schedule_timeout(timeout);
161 remove_wait_queue(&hdev->req_wait_q, &wait);
163 if (signal_pending(current))
164 return ERR_PTR(-EINTR);
166 switch (hdev->req_status) {
168 err = -bt_to_errno(hdev->req_result);
171 case HCI_REQ_CANCELED:
172 err = -hdev->req_result;
180 hdev->req_status = hdev->req_result = 0;
182 BT_DBG("%s end: err %d", hdev->name, err);
187 return hci_get_cmd_complete(hdev, opcode, event);
189 EXPORT_SYMBOL(__hci_cmd_sync_ev);
191 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
192 const void *param, u32 timeout)
194 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
196 EXPORT_SYMBOL(__hci_cmd_sync);
198 /* Execute request and wait for completion. */
199 static int __hci_req_sync(struct hci_dev *hdev,
200 void (*func)(struct hci_request *req,
202 unsigned long opt, __u32 timeout)
204 struct hci_request req;
205 DECLARE_WAITQUEUE(wait, current);
208 BT_DBG("%s start", hdev->name);
210 hci_req_init(&req, hdev);
212 hdev->req_status = HCI_REQ_PEND;
216 err = hci_req_run(&req, hci_req_sync_complete);
218 hdev->req_status = 0;
220 /* ENODATA means the HCI request command queue is empty.
221 * This can happen when a request with conditionals doesn't
222 * trigger any commands to be sent. This is normal behavior
223 * and should not trigger an error return.
231 add_wait_queue(&hdev->req_wait_q, &wait);
232 set_current_state(TASK_INTERRUPTIBLE);
234 schedule_timeout(timeout);
236 remove_wait_queue(&hdev->req_wait_q, &wait);
238 if (signal_pending(current))
241 switch (hdev->req_status) {
243 err = -bt_to_errno(hdev->req_result);
246 case HCI_REQ_CANCELED:
247 err = -hdev->req_result;
255 hdev->req_status = hdev->req_result = 0;
257 BT_DBG("%s end: err %d", hdev->name, err);
262 static int hci_req_sync(struct hci_dev *hdev,
263 void (*req)(struct hci_request *req,
265 unsigned long opt, __u32 timeout)
269 if (!test_bit(HCI_UP, &hdev->flags))
272 /* Serialize all requests */
274 ret = __hci_req_sync(hdev, req, opt, timeout);
275 hci_req_unlock(hdev);
280 static void hci_reset_req(struct hci_request *req, unsigned long opt)
282 BT_DBG("%s %ld", req->hdev->name, opt);
285 set_bit(HCI_RESET, &req->hdev->flags);
286 hci_req_add(req, HCI_OP_RESET, 0, NULL);
289 static void bredr_init(struct hci_request *req)
291 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
293 /* Read Local Supported Features */
294 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
296 /* Read Local Version */
297 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
299 /* Read BD Address */
300 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
303 static void amp_init(struct hci_request *req)
305 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
307 /* Read Local Version */
308 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
310 /* Read Local AMP Info */
311 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
313 /* Read Data Blk size */
314 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
317 static void hci_init1_req(struct hci_request *req, unsigned long opt)
319 struct hci_dev *hdev = req->hdev;
321 BT_DBG("%s %ld", hdev->name, opt);
324 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
325 hci_reset_req(req, 0);
327 switch (hdev->dev_type) {
337 BT_ERR("Unknown device type %d", hdev->dev_type);
342 static void bredr_setup(struct hci_request *req)
347 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
348 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
350 /* Read Class of Device */
351 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
353 /* Read Local Name */
354 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
356 /* Read Voice Setting */
357 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
359 /* Clear Event Filters */
360 flt_type = HCI_FLT_CLEAR_ALL;
361 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
363 /* Connection accept timeout ~20 secs */
364 param = __constant_cpu_to_le16(0x7d00);
365 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
367 /* Read page scan parameters */
368 if (req->hdev->hci_ver > BLUETOOTH_VER_1_1) {
369 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
370 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
374 static void le_setup(struct hci_request *req)
376 struct hci_dev *hdev = req->hdev;
378 /* Read LE Buffer Size */
379 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
381 /* Read LE Local Supported Features */
382 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
384 /* Read LE Advertising Channel TX Power */
385 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
387 /* Read LE White List Size */
388 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
390 /* Read LE Supported States */
391 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
393 /* LE-only controllers have LE implicitly enabled */
394 if (!lmp_bredr_capable(hdev))
395 set_bit(HCI_LE_ENABLED, &hdev->dev_flags);
398 static u8 hci_get_inquiry_mode(struct hci_dev *hdev)
400 if (lmp_ext_inq_capable(hdev))
403 if (lmp_inq_rssi_capable(hdev))
406 if (hdev->manufacturer == 11 && hdev->hci_rev == 0x00 &&
407 hdev->lmp_subver == 0x0757)
410 if (hdev->manufacturer == 15) {
411 if (hdev->hci_rev == 0x03 && hdev->lmp_subver == 0x6963)
413 if (hdev->hci_rev == 0x09 && hdev->lmp_subver == 0x6963)
415 if (hdev->hci_rev == 0x00 && hdev->lmp_subver == 0x6965)
419 if (hdev->manufacturer == 31 && hdev->hci_rev == 0x2005 &&
420 hdev->lmp_subver == 0x1805)
426 static void hci_setup_inquiry_mode(struct hci_request *req)
430 mode = hci_get_inquiry_mode(req->hdev);
432 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
435 static void hci_setup_event_mask(struct hci_request *req)
437 struct hci_dev *hdev = req->hdev;
439 /* The second byte is 0xff instead of 0x9f (two reserved bits
440 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
443 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
445 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
446 * any event mask for pre 1.2 devices.
448 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
451 if (lmp_bredr_capable(hdev)) {
452 events[4] |= 0x01; /* Flow Specification Complete */
453 events[4] |= 0x02; /* Inquiry Result with RSSI */
454 events[4] |= 0x04; /* Read Remote Extended Features Complete */
455 events[5] |= 0x08; /* Synchronous Connection Complete */
456 events[5] |= 0x10; /* Synchronous Connection Changed */
459 if (lmp_inq_rssi_capable(hdev))
460 events[4] |= 0x02; /* Inquiry Result with RSSI */
462 if (lmp_sniffsubr_capable(hdev))
463 events[5] |= 0x20; /* Sniff Subrating */
465 if (lmp_pause_enc_capable(hdev))
466 events[5] |= 0x80; /* Encryption Key Refresh Complete */
468 if (lmp_ext_inq_capable(hdev))
469 events[5] |= 0x40; /* Extended Inquiry Result */
471 if (lmp_no_flush_capable(hdev))
472 events[7] |= 0x01; /* Enhanced Flush Complete */
474 if (lmp_lsto_capable(hdev))
475 events[6] |= 0x80; /* Link Supervision Timeout Changed */
477 if (lmp_ssp_capable(hdev)) {
478 events[6] |= 0x01; /* IO Capability Request */
479 events[6] |= 0x02; /* IO Capability Response */
480 events[6] |= 0x04; /* User Confirmation Request */
481 events[6] |= 0x08; /* User Passkey Request */
482 events[6] |= 0x10; /* Remote OOB Data Request */
483 events[6] |= 0x20; /* Simple Pairing Complete */
484 events[7] |= 0x04; /* User Passkey Notification */
485 events[7] |= 0x08; /* Keypress Notification */
486 events[7] |= 0x10; /* Remote Host Supported
487 * Features Notification
491 if (lmp_le_capable(hdev))
492 events[7] |= 0x20; /* LE Meta-Event */
494 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
496 if (lmp_le_capable(hdev)) {
497 memset(events, 0, sizeof(events));
499 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK,
500 sizeof(events), events);
504 static void hci_init2_req(struct hci_request *req, unsigned long opt)
506 struct hci_dev *hdev = req->hdev;
508 if (lmp_bredr_capable(hdev))
511 if (lmp_le_capable(hdev))
514 hci_setup_event_mask(req);
516 if (hdev->hci_ver > BLUETOOTH_VER_1_1)
517 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
519 if (lmp_ssp_capable(hdev)) {
520 if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
522 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
523 sizeof(mode), &mode);
525 struct hci_cp_write_eir cp;
527 memset(hdev->eir, 0, sizeof(hdev->eir));
528 memset(&cp, 0, sizeof(cp));
530 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
534 if (lmp_inq_rssi_capable(hdev))
535 hci_setup_inquiry_mode(req);
537 if (lmp_inq_tx_pwr_capable(hdev))
538 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
540 if (lmp_ext_feat_capable(hdev)) {
541 struct hci_cp_read_local_ext_features cp;
544 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
548 if (test_bit(HCI_LINK_SECURITY, &hdev->dev_flags)) {
550 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
555 static void hci_setup_link_policy(struct hci_request *req)
557 struct hci_dev *hdev = req->hdev;
558 struct hci_cp_write_def_link_policy cp;
561 if (lmp_rswitch_capable(hdev))
562 link_policy |= HCI_LP_RSWITCH;
563 if (lmp_hold_capable(hdev))
564 link_policy |= HCI_LP_HOLD;
565 if (lmp_sniff_capable(hdev))
566 link_policy |= HCI_LP_SNIFF;
567 if (lmp_park_capable(hdev))
568 link_policy |= HCI_LP_PARK;
570 cp.policy = cpu_to_le16(link_policy);
571 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
574 static void hci_set_le_support(struct hci_request *req)
576 struct hci_dev *hdev = req->hdev;
577 struct hci_cp_write_le_host_supported cp;
579 /* LE-only devices do not support explicit enablement */
580 if (!lmp_bredr_capable(hdev))
583 memset(&cp, 0, sizeof(cp));
585 if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
587 cp.simul = lmp_le_br_capable(hdev);
590 if (cp.le != lmp_host_le_capable(hdev))
591 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
595 static void hci_init3_req(struct hci_request *req, unsigned long opt)
597 struct hci_dev *hdev = req->hdev;
600 /* Only send HCI_Delete_Stored_Link_Key if it is supported */
601 if (hdev->commands[6] & 0x80) {
602 struct hci_cp_delete_stored_link_key cp;
604 bacpy(&cp.bdaddr, BDADDR_ANY);
605 cp.delete_all = 0x01;
606 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
610 if (hdev->commands[5] & 0x10)
611 hci_setup_link_policy(req);
613 if (lmp_le_capable(hdev)) {
614 hci_set_le_support(req);
618 /* Read features beyond page 1 if available */
619 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
620 struct hci_cp_read_local_ext_features cp;
623 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
628 static int __hci_init(struct hci_dev *hdev)
632 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
636 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
637 * BR/EDR/LE type controllers. AMP controllers only need the
640 if (hdev->dev_type != HCI_BREDR)
643 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
647 return __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
650 static void hci_scan_req(struct hci_request *req, unsigned long opt)
654 BT_DBG("%s %x", req->hdev->name, scan);
656 /* Inquiry and Page scans */
657 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
660 static void hci_auth_req(struct hci_request *req, unsigned long opt)
664 BT_DBG("%s %x", req->hdev->name, auth);
667 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
670 static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
674 BT_DBG("%s %x", req->hdev->name, encrypt);
677 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
680 static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
682 __le16 policy = cpu_to_le16(opt);
684 BT_DBG("%s %x", req->hdev->name, policy);
686 /* Default link policy */
687 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
690 /* Get HCI device by index.
691 * Device is held on return. */
692 struct hci_dev *hci_dev_get(int index)
694 struct hci_dev *hdev = NULL, *d;
701 read_lock(&hci_dev_list_lock);
702 list_for_each_entry(d, &hci_dev_list, list) {
703 if (d->id == index) {
704 hdev = hci_dev_hold(d);
708 read_unlock(&hci_dev_list_lock);
712 /* ---- Inquiry support ---- */
714 bool hci_discovery_active(struct hci_dev *hdev)
716 struct discovery_state *discov = &hdev->discovery;
718 switch (discov->state) {
719 case DISCOVERY_FINDING:
720 case DISCOVERY_RESOLVING:
728 void hci_discovery_set_state(struct hci_dev *hdev, int state)
730 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
732 if (hdev->discovery.state == state)
736 case DISCOVERY_STOPPED:
737 if (hdev->discovery.state != DISCOVERY_STARTING)
738 mgmt_discovering(hdev, 0);
740 case DISCOVERY_STARTING:
742 case DISCOVERY_FINDING:
743 mgmt_discovering(hdev, 1);
745 case DISCOVERY_RESOLVING:
747 case DISCOVERY_STOPPING:
751 hdev->discovery.state = state;
754 static void inquiry_cache_flush(struct hci_dev *hdev)
756 struct discovery_state *cache = &hdev->discovery;
757 struct inquiry_entry *p, *n;
759 list_for_each_entry_safe(p, n, &cache->all, all) {
764 INIT_LIST_HEAD(&cache->unknown);
765 INIT_LIST_HEAD(&cache->resolve);
768 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
771 struct discovery_state *cache = &hdev->discovery;
772 struct inquiry_entry *e;
774 BT_DBG("cache %p, %pMR", cache, bdaddr);
776 list_for_each_entry(e, &cache->all, all) {
777 if (!bacmp(&e->data.bdaddr, bdaddr))
784 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
787 struct discovery_state *cache = &hdev->discovery;
788 struct inquiry_entry *e;
790 BT_DBG("cache %p, %pMR", cache, bdaddr);
792 list_for_each_entry(e, &cache->unknown, list) {
793 if (!bacmp(&e->data.bdaddr, bdaddr))
800 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
804 struct discovery_state *cache = &hdev->discovery;
805 struct inquiry_entry *e;
807 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
809 list_for_each_entry(e, &cache->resolve, list) {
810 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
812 if (!bacmp(&e->data.bdaddr, bdaddr))
819 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
820 struct inquiry_entry *ie)
822 struct discovery_state *cache = &hdev->discovery;
823 struct list_head *pos = &cache->resolve;
824 struct inquiry_entry *p;
828 list_for_each_entry(p, &cache->resolve, list) {
829 if (p->name_state != NAME_PENDING &&
830 abs(p->data.rssi) >= abs(ie->data.rssi))
835 list_add(&ie->list, pos);
838 bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
839 bool name_known, bool *ssp)
841 struct discovery_state *cache = &hdev->discovery;
842 struct inquiry_entry *ie;
844 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
846 hci_remove_remote_oob_data(hdev, &data->bdaddr);
849 *ssp = data->ssp_mode;
851 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
853 if (ie->data.ssp_mode && ssp)
856 if (ie->name_state == NAME_NEEDED &&
857 data->rssi != ie->data.rssi) {
858 ie->data.rssi = data->rssi;
859 hci_inquiry_cache_update_resolve(hdev, ie);
865 /* Entry not in the cache. Add new one. */
866 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
870 list_add(&ie->all, &cache->all);
873 ie->name_state = NAME_KNOWN;
875 ie->name_state = NAME_NOT_KNOWN;
876 list_add(&ie->list, &cache->unknown);
880 if (name_known && ie->name_state != NAME_KNOWN &&
881 ie->name_state != NAME_PENDING) {
882 ie->name_state = NAME_KNOWN;
886 memcpy(&ie->data, data, sizeof(*data));
887 ie->timestamp = jiffies;
888 cache->timestamp = jiffies;
890 if (ie->name_state == NAME_NOT_KNOWN)
896 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
898 struct discovery_state *cache = &hdev->discovery;
899 struct inquiry_info *info = (struct inquiry_info *) buf;
900 struct inquiry_entry *e;
903 list_for_each_entry(e, &cache->all, all) {
904 struct inquiry_data *data = &e->data;
909 bacpy(&info->bdaddr, &data->bdaddr);
910 info->pscan_rep_mode = data->pscan_rep_mode;
911 info->pscan_period_mode = data->pscan_period_mode;
912 info->pscan_mode = data->pscan_mode;
913 memcpy(info->dev_class, data->dev_class, 3);
914 info->clock_offset = data->clock_offset;
920 BT_DBG("cache %p, copied %d", cache, copied);
924 static void hci_inq_req(struct hci_request *req, unsigned long opt)
926 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
927 struct hci_dev *hdev = req->hdev;
928 struct hci_cp_inquiry cp;
930 BT_DBG("%s", hdev->name);
932 if (test_bit(HCI_INQUIRY, &hdev->flags))
936 memcpy(&cp.lap, &ir->lap, 3);
937 cp.length = ir->length;
938 cp.num_rsp = ir->num_rsp;
939 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
942 static int wait_inquiry(void *word)
945 return signal_pending(current);
948 int hci_inquiry(void __user *arg)
950 __u8 __user *ptr = arg;
951 struct hci_inquiry_req ir;
952 struct hci_dev *hdev;
953 int err = 0, do_inquiry = 0, max_rsp;
957 if (copy_from_user(&ir, ptr, sizeof(ir)))
960 hdev = hci_dev_get(ir.dev_id);
965 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
966 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
967 inquiry_cache_flush(hdev);
970 hci_dev_unlock(hdev);
972 timeo = ir.length * msecs_to_jiffies(2000);
975 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
980 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
981 * cleared). If it is interrupted by a signal, return -EINTR.
983 if (wait_on_bit(&hdev->flags, HCI_INQUIRY, wait_inquiry,
988 /* for unlimited number of responses we will use buffer with
991 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
993 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
994 * copy it to the user space.
996 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1003 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1004 hci_dev_unlock(hdev);
1006 BT_DBG("num_rsp %d", ir.num_rsp);
1008 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1010 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1023 static u8 create_ad(struct hci_dev *hdev, u8 *ptr)
1025 u8 ad_len = 0, flags = 0;
1028 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
1029 flags |= LE_AD_GENERAL;
1031 if (!lmp_bredr_capable(hdev))
1032 flags |= LE_AD_NO_BREDR;
1034 if (lmp_le_br_capable(hdev))
1035 flags |= LE_AD_SIM_LE_BREDR_CTRL;
1037 if (lmp_host_le_br_capable(hdev))
1038 flags |= LE_AD_SIM_LE_BREDR_HOST;
1041 BT_DBG("adv flags 0x%02x", flags);
1051 if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
1053 ptr[1] = EIR_TX_POWER;
1054 ptr[2] = (u8) hdev->adv_tx_power;
1060 name_len = strlen(hdev->dev_name);
1062 size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
1064 if (name_len > max_len) {
1066 ptr[1] = EIR_NAME_SHORT;
1068 ptr[1] = EIR_NAME_COMPLETE;
1070 ptr[0] = name_len + 1;
1072 memcpy(ptr + 2, hdev->dev_name, name_len);
1074 ad_len += (name_len + 2);
1075 ptr += (name_len + 2);
1081 void hci_update_ad(struct hci_request *req)
1083 struct hci_dev *hdev = req->hdev;
1084 struct hci_cp_le_set_adv_data cp;
1087 if (!lmp_le_capable(hdev))
1090 memset(&cp, 0, sizeof(cp));
1092 len = create_ad(hdev, cp.data);
1094 if (hdev->adv_data_len == len &&
1095 memcmp(cp.data, hdev->adv_data, len) == 0)
1098 memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
1099 hdev->adv_data_len = len;
1103 hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
1106 /* ---- HCI ioctl helpers ---- */
1108 int hci_dev_open(__u16 dev)
1110 struct hci_dev *hdev;
1113 hdev = hci_dev_get(dev);
1117 BT_DBG("%s %p", hdev->name, hdev);
1121 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
1126 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
1131 if (test_bit(HCI_UP, &hdev->flags)) {
1136 if (hdev->open(hdev)) {
1141 atomic_set(&hdev->cmd_cnt, 1);
1142 set_bit(HCI_INIT, &hdev->flags);
1144 if (hdev->setup && test_bit(HCI_SETUP, &hdev->dev_flags))
1145 ret = hdev->setup(hdev);
1148 /* Treat all non BR/EDR controllers as raw devices if
1149 * enable_hs is not set.
1151 if (hdev->dev_type != HCI_BREDR && !enable_hs)
1152 set_bit(HCI_RAW, &hdev->flags);
1154 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
1155 set_bit(HCI_RAW, &hdev->flags);
1157 if (!test_bit(HCI_RAW, &hdev->flags))
1158 ret = __hci_init(hdev);
1161 clear_bit(HCI_INIT, &hdev->flags);
1165 set_bit(HCI_UP, &hdev->flags);
1166 hci_notify(hdev, HCI_DEV_UP);
1167 if (!test_bit(HCI_SETUP, &hdev->dev_flags) &&
1168 mgmt_valid_hdev(hdev)) {
1170 mgmt_powered(hdev, 1);
1171 hci_dev_unlock(hdev);
1174 /* Init failed, cleanup */
1175 flush_work(&hdev->tx_work);
1176 flush_work(&hdev->cmd_work);
1177 flush_work(&hdev->rx_work);
1179 skb_queue_purge(&hdev->cmd_q);
1180 skb_queue_purge(&hdev->rx_q);
1185 if (hdev->sent_cmd) {
1186 kfree_skb(hdev->sent_cmd);
1187 hdev->sent_cmd = NULL;
1195 hci_req_unlock(hdev);
1200 static int hci_dev_do_close(struct hci_dev *hdev)
1202 BT_DBG("%s %p", hdev->name, hdev);
1204 cancel_work_sync(&hdev->le_scan);
1206 cancel_delayed_work(&hdev->power_off);
1208 hci_req_cancel(hdev, ENODEV);
1211 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1212 del_timer_sync(&hdev->cmd_timer);
1213 hci_req_unlock(hdev);
1217 /* Flush RX and TX works */
1218 flush_work(&hdev->tx_work);
1219 flush_work(&hdev->rx_work);
1221 if (hdev->discov_timeout > 0) {
1222 cancel_delayed_work(&hdev->discov_off);
1223 hdev->discov_timeout = 0;
1224 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
1227 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
1228 cancel_delayed_work(&hdev->service_cache);
1230 cancel_delayed_work_sync(&hdev->le_scan_disable);
1233 inquiry_cache_flush(hdev);
1234 hci_conn_hash_flush(hdev);
1235 hci_dev_unlock(hdev);
1237 hci_notify(hdev, HCI_DEV_DOWN);
1243 skb_queue_purge(&hdev->cmd_q);
1244 atomic_set(&hdev->cmd_cnt, 1);
1245 if (!test_bit(HCI_RAW, &hdev->flags) &&
1246 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1247 set_bit(HCI_INIT, &hdev->flags);
1248 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1249 clear_bit(HCI_INIT, &hdev->flags);
1252 /* flush cmd work */
1253 flush_work(&hdev->cmd_work);
1256 skb_queue_purge(&hdev->rx_q);
1257 skb_queue_purge(&hdev->cmd_q);
1258 skb_queue_purge(&hdev->raw_q);
1260 /* Drop last sent command */
1261 if (hdev->sent_cmd) {
1262 del_timer_sync(&hdev->cmd_timer);
1263 kfree_skb(hdev->sent_cmd);
1264 hdev->sent_cmd = NULL;
1267 kfree_skb(hdev->recv_evt);
1268 hdev->recv_evt = NULL;
1270 /* After this point our queues are empty
1271 * and no tasks are scheduled. */
1276 hdev->dev_flags &= ~HCI_PERSISTENT_MASK;
1278 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags) &&
1279 mgmt_valid_hdev(hdev)) {
1281 mgmt_powered(hdev, 0);
1282 hci_dev_unlock(hdev);
1285 /* Controller radio is available but is currently powered down */
1286 hdev->amp_status = 0;
1288 memset(hdev->eir, 0, sizeof(hdev->eir));
1289 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1291 hci_req_unlock(hdev);
1297 int hci_dev_close(__u16 dev)
1299 struct hci_dev *hdev;
1302 hdev = hci_dev_get(dev);
1306 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1307 cancel_delayed_work(&hdev->power_off);
1309 err = hci_dev_do_close(hdev);
1315 int hci_dev_reset(__u16 dev)
1317 struct hci_dev *hdev;
1320 hdev = hci_dev_get(dev);
1326 if (!test_bit(HCI_UP, &hdev->flags))
1330 skb_queue_purge(&hdev->rx_q);
1331 skb_queue_purge(&hdev->cmd_q);
1334 inquiry_cache_flush(hdev);
1335 hci_conn_hash_flush(hdev);
1336 hci_dev_unlock(hdev);
1341 atomic_set(&hdev->cmd_cnt, 1);
1342 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1344 if (!test_bit(HCI_RAW, &hdev->flags))
1345 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1348 hci_req_unlock(hdev);
1353 int hci_dev_reset_stat(__u16 dev)
1355 struct hci_dev *hdev;
1358 hdev = hci_dev_get(dev);
1362 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1369 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1371 struct hci_dev *hdev;
1372 struct hci_dev_req dr;
1375 if (copy_from_user(&dr, arg, sizeof(dr)))
1378 hdev = hci_dev_get(dr.dev_id);
1384 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1389 if (!lmp_encrypt_capable(hdev)) {
1394 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1395 /* Auth must be enabled first */
1396 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1402 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1407 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1412 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1416 case HCISETLINKMODE:
1417 hdev->link_mode = ((__u16) dr.dev_opt) &
1418 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1422 hdev->pkt_type = (__u16) dr.dev_opt;
1426 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1427 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1431 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1432 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1444 int hci_get_dev_list(void __user *arg)
1446 struct hci_dev *hdev;
1447 struct hci_dev_list_req *dl;
1448 struct hci_dev_req *dr;
1449 int n = 0, size, err;
1452 if (get_user(dev_num, (__u16 __user *) arg))
1455 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1458 size = sizeof(*dl) + dev_num * sizeof(*dr);
1460 dl = kzalloc(size, GFP_KERNEL);
1466 read_lock(&hci_dev_list_lock);
1467 list_for_each_entry(hdev, &hci_dev_list, list) {
1468 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1469 cancel_delayed_work(&hdev->power_off);
1471 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1472 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1474 (dr + n)->dev_id = hdev->id;
1475 (dr + n)->dev_opt = hdev->flags;
1480 read_unlock(&hci_dev_list_lock);
1483 size = sizeof(*dl) + n * sizeof(*dr);
1485 err = copy_to_user(arg, dl, size);
1488 return err ? -EFAULT : 0;
1491 int hci_get_dev_info(void __user *arg)
1493 struct hci_dev *hdev;
1494 struct hci_dev_info di;
1497 if (copy_from_user(&di, arg, sizeof(di)))
1500 hdev = hci_dev_get(di.dev_id);
1504 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1505 cancel_delayed_work_sync(&hdev->power_off);
1507 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1508 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
1510 strcpy(di.name, hdev->name);
1511 di.bdaddr = hdev->bdaddr;
1512 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1513 di.flags = hdev->flags;
1514 di.pkt_type = hdev->pkt_type;
1515 if (lmp_bredr_capable(hdev)) {
1516 di.acl_mtu = hdev->acl_mtu;
1517 di.acl_pkts = hdev->acl_pkts;
1518 di.sco_mtu = hdev->sco_mtu;
1519 di.sco_pkts = hdev->sco_pkts;
1521 di.acl_mtu = hdev->le_mtu;
1522 di.acl_pkts = hdev->le_pkts;
1526 di.link_policy = hdev->link_policy;
1527 di.link_mode = hdev->link_mode;
1529 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1530 memcpy(&di.features, &hdev->features, sizeof(di.features));
1532 if (copy_to_user(arg, &di, sizeof(di)))
1540 /* ---- Interface to HCI drivers ---- */
1542 static int hci_rfkill_set_block(void *data, bool blocked)
1544 struct hci_dev *hdev = data;
1546 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1551 hci_dev_do_close(hdev);
1556 static const struct rfkill_ops hci_rfkill_ops = {
1557 .set_block = hci_rfkill_set_block,
1560 static void hci_power_on(struct work_struct *work)
1562 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1565 BT_DBG("%s", hdev->name);
1567 err = hci_dev_open(hdev->id);
1569 mgmt_set_powered_failed(hdev, err);
1573 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
1574 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1575 HCI_AUTO_OFF_TIMEOUT);
1577 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
1578 mgmt_index_added(hdev);
1581 static void hci_power_off(struct work_struct *work)
1583 struct hci_dev *hdev = container_of(work, struct hci_dev,
1586 BT_DBG("%s", hdev->name);
1588 hci_dev_do_close(hdev);
1591 static void hci_discov_off(struct work_struct *work)
1593 struct hci_dev *hdev;
1594 u8 scan = SCAN_PAGE;
1596 hdev = container_of(work, struct hci_dev, discov_off.work);
1598 BT_DBG("%s", hdev->name);
1602 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1604 hdev->discov_timeout = 0;
1606 hci_dev_unlock(hdev);
1609 int hci_uuids_clear(struct hci_dev *hdev)
1611 struct bt_uuid *uuid, *tmp;
1613 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1614 list_del(&uuid->list);
1621 int hci_link_keys_clear(struct hci_dev *hdev)
1623 struct list_head *p, *n;
1625 list_for_each_safe(p, n, &hdev->link_keys) {
1626 struct link_key *key;
1628 key = list_entry(p, struct link_key, list);
1637 int hci_smp_ltks_clear(struct hci_dev *hdev)
1639 struct smp_ltk *k, *tmp;
1641 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1649 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1653 list_for_each_entry(k, &hdev->link_keys, list)
1654 if (bacmp(bdaddr, &k->bdaddr) == 0)
1660 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1661 u8 key_type, u8 old_key_type)
1664 if (key_type < 0x03)
1667 /* Debug keys are insecure so don't store them persistently */
1668 if (key_type == HCI_LK_DEBUG_COMBINATION)
1671 /* Changed combination key and there's no previous one */
1672 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1675 /* Security mode 3 case */
1679 /* Neither local nor remote side had no-bonding as requirement */
1680 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1683 /* Local side had dedicated bonding as requirement */
1684 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1687 /* Remote side had dedicated bonding as requirement */
1688 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1691 /* If none of the above criteria match, then don't store the key
1696 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
1700 list_for_each_entry(k, &hdev->long_term_keys, list) {
1701 if (k->ediv != ediv ||
1702 memcmp(rand, k->rand, sizeof(k->rand)))
1711 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1716 list_for_each_entry(k, &hdev->long_term_keys, list)
1717 if (addr_type == k->bdaddr_type &&
1718 bacmp(bdaddr, &k->bdaddr) == 0)
1724 int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
1725 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
1727 struct link_key *key, *old_key;
1731 old_key = hci_find_link_key(hdev, bdaddr);
1733 old_key_type = old_key->type;
1736 old_key_type = conn ? conn->key_type : 0xff;
1737 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1740 list_add(&key->list, &hdev->link_keys);
1743 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1745 /* Some buggy controller combinations generate a changed
1746 * combination key for legacy pairing even when there's no
1748 if (type == HCI_LK_CHANGED_COMBINATION &&
1749 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1750 type = HCI_LK_COMBINATION;
1752 conn->key_type = type;
1755 bacpy(&key->bdaddr, bdaddr);
1756 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1757 key->pin_len = pin_len;
1759 if (type == HCI_LK_CHANGED_COMBINATION)
1760 key->type = old_key_type;
1767 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1769 mgmt_new_link_key(hdev, key, persistent);
1772 conn->flush_key = !persistent;
1777 int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
1778 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
1781 struct smp_ltk *key, *old_key;
1783 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1786 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1790 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1793 list_add(&key->list, &hdev->long_term_keys);
1796 bacpy(&key->bdaddr, bdaddr);
1797 key->bdaddr_type = addr_type;
1798 memcpy(key->val, tk, sizeof(key->val));
1799 key->authenticated = authenticated;
1801 key->enc_size = enc_size;
1803 memcpy(key->rand, rand, sizeof(key->rand));
1808 if (type & HCI_SMP_LTK)
1809 mgmt_new_ltk(hdev, key, 1);
1814 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1816 struct link_key *key;
1818 key = hci_find_link_key(hdev, bdaddr);
1822 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1824 list_del(&key->list);
1830 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1832 struct smp_ltk *k, *tmp;
1834 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1835 if (bacmp(bdaddr, &k->bdaddr))
1838 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1847 /* HCI command timer function */
1848 static void hci_cmd_timeout(unsigned long arg)
1850 struct hci_dev *hdev = (void *) arg;
1852 if (hdev->sent_cmd) {
1853 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1854 u16 opcode = __le16_to_cpu(sent->opcode);
1856 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
1858 BT_ERR("%s command tx timeout", hdev->name);
1861 atomic_set(&hdev->cmd_cnt, 1);
1862 queue_work(hdev->workqueue, &hdev->cmd_work);
1865 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1868 struct oob_data *data;
1870 list_for_each_entry(data, &hdev->remote_oob_data, list)
1871 if (bacmp(bdaddr, &data->bdaddr) == 0)
1877 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1879 struct oob_data *data;
1881 data = hci_find_remote_oob_data(hdev, bdaddr);
1885 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1887 list_del(&data->list);
1893 int hci_remote_oob_data_clear(struct hci_dev *hdev)
1895 struct oob_data *data, *n;
1897 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1898 list_del(&data->list);
1905 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
1908 struct oob_data *data;
1910 data = hci_find_remote_oob_data(hdev, bdaddr);
1913 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1917 bacpy(&data->bdaddr, bdaddr);
1918 list_add(&data->list, &hdev->remote_oob_data);
1921 memcpy(data->hash, hash, sizeof(data->hash));
1922 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1924 BT_DBG("%s for %pMR", hdev->name, bdaddr);
1929 struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
1931 struct bdaddr_list *b;
1933 list_for_each_entry(b, &hdev->blacklist, list)
1934 if (bacmp(bdaddr, &b->bdaddr) == 0)
1940 int hci_blacklist_clear(struct hci_dev *hdev)
1942 struct list_head *p, *n;
1944 list_for_each_safe(p, n, &hdev->blacklist) {
1945 struct bdaddr_list *b;
1947 b = list_entry(p, struct bdaddr_list, list);
1956 int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1958 struct bdaddr_list *entry;
1960 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1963 if (hci_blacklist_lookup(hdev, bdaddr))
1966 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
1970 bacpy(&entry->bdaddr, bdaddr);
1972 list_add(&entry->list, &hdev->blacklist);
1974 return mgmt_device_blocked(hdev, bdaddr, type);
1977 int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1979 struct bdaddr_list *entry;
1981 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1982 return hci_blacklist_clear(hdev);
1984 entry = hci_blacklist_lookup(hdev, bdaddr);
1988 list_del(&entry->list);
1991 return mgmt_device_unblocked(hdev, bdaddr, type);
1994 static void le_scan_param_req(struct hci_request *req, unsigned long opt)
1996 struct le_scan_params *param = (struct le_scan_params *) opt;
1997 struct hci_cp_le_set_scan_param cp;
1999 memset(&cp, 0, sizeof(cp));
2000 cp.type = param->type;
2001 cp.interval = cpu_to_le16(param->interval);
2002 cp.window = cpu_to_le16(param->window);
2004 hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
2007 static void le_scan_enable_req(struct hci_request *req, unsigned long opt)
2009 struct hci_cp_le_set_scan_enable cp;
2011 memset(&cp, 0, sizeof(cp));
2012 cp.enable = LE_SCAN_ENABLE;
2013 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
2015 hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2018 static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
2019 u16 window, int timeout)
2021 long timeo = msecs_to_jiffies(3000);
2022 struct le_scan_params param;
2025 BT_DBG("%s", hdev->name);
2027 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
2028 return -EINPROGRESS;
2031 param.interval = interval;
2032 param.window = window;
2036 err = __hci_req_sync(hdev, le_scan_param_req, (unsigned long) ¶m,
2039 err = __hci_req_sync(hdev, le_scan_enable_req, 0, timeo);
2041 hci_req_unlock(hdev);
2046 queue_delayed_work(hdev->workqueue, &hdev->le_scan_disable,
2052 int hci_cancel_le_scan(struct hci_dev *hdev)
2054 BT_DBG("%s", hdev->name);
2056 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
2059 if (cancel_delayed_work(&hdev->le_scan_disable)) {
2060 struct hci_cp_le_set_scan_enable cp;
2062 /* Send HCI command to disable LE Scan */
2063 memset(&cp, 0, sizeof(cp));
2064 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2070 static void le_scan_disable_work(struct work_struct *work)
2072 struct hci_dev *hdev = container_of(work, struct hci_dev,
2073 le_scan_disable.work);
2074 struct hci_cp_le_set_scan_enable cp;
2076 BT_DBG("%s", hdev->name);
2078 memset(&cp, 0, sizeof(cp));
2080 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2083 static void le_scan_work(struct work_struct *work)
2085 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
2086 struct le_scan_params *param = &hdev->le_scan_params;
2088 BT_DBG("%s", hdev->name);
2090 hci_do_le_scan(hdev, param->type, param->interval, param->window,
2094 int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
2097 struct le_scan_params *param = &hdev->le_scan_params;
2099 BT_DBG("%s", hdev->name);
2101 if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags))
2104 if (work_busy(&hdev->le_scan))
2105 return -EINPROGRESS;
2108 param->interval = interval;
2109 param->window = window;
2110 param->timeout = timeout;
2112 queue_work(system_long_wq, &hdev->le_scan);
2117 /* Alloc HCI device */
2118 struct hci_dev *hci_alloc_dev(void)
2120 struct hci_dev *hdev;
2122 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
2126 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2127 hdev->esco_type = (ESCO_HV1);
2128 hdev->link_mode = (HCI_LM_ACCEPT);
2129 hdev->io_capability = 0x03; /* No Input No Output */
2130 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2131 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2133 hdev->sniff_max_interval = 800;
2134 hdev->sniff_min_interval = 80;
2136 mutex_init(&hdev->lock);
2137 mutex_init(&hdev->req_lock);
2139 INIT_LIST_HEAD(&hdev->mgmt_pending);
2140 INIT_LIST_HEAD(&hdev->blacklist);
2141 INIT_LIST_HEAD(&hdev->uuids);
2142 INIT_LIST_HEAD(&hdev->link_keys);
2143 INIT_LIST_HEAD(&hdev->long_term_keys);
2144 INIT_LIST_HEAD(&hdev->remote_oob_data);
2145 INIT_LIST_HEAD(&hdev->conn_hash.list);
2147 INIT_WORK(&hdev->rx_work, hci_rx_work);
2148 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2149 INIT_WORK(&hdev->tx_work, hci_tx_work);
2150 INIT_WORK(&hdev->power_on, hci_power_on);
2151 INIT_WORK(&hdev->le_scan, le_scan_work);
2153 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2154 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
2155 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
2157 skb_queue_head_init(&hdev->rx_q);
2158 skb_queue_head_init(&hdev->cmd_q);
2159 skb_queue_head_init(&hdev->raw_q);
2161 init_waitqueue_head(&hdev->req_wait_q);
2163 setup_timer(&hdev->cmd_timer, hci_cmd_timeout, (unsigned long) hdev);
2165 hci_init_sysfs(hdev);
2166 discovery_init(hdev);
2170 EXPORT_SYMBOL(hci_alloc_dev);
2172 /* Free HCI device */
2173 void hci_free_dev(struct hci_dev *hdev)
2175 /* will free via device release */
2176 put_device(&hdev->dev);
2178 EXPORT_SYMBOL(hci_free_dev);
2180 /* Register HCI device */
2181 int hci_register_dev(struct hci_dev *hdev)
2185 if (!hdev->open || !hdev->close)
2188 /* Do not allow HCI_AMP devices to register at index 0,
2189 * so the index can be used as the AMP controller ID.
2191 switch (hdev->dev_type) {
2193 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
2196 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
2205 sprintf(hdev->name, "hci%d", id);
2208 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2210 write_lock(&hci_dev_list_lock);
2211 list_add(&hdev->list, &hci_dev_list);
2212 write_unlock(&hci_dev_list_lock);
2214 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
2216 if (!hdev->workqueue) {
2221 hdev->req_workqueue = alloc_workqueue(hdev->name,
2222 WQ_HIGHPRI | WQ_UNBOUND |
2224 if (!hdev->req_workqueue) {
2225 destroy_workqueue(hdev->workqueue);
2230 error = hci_add_sysfs(hdev);
2234 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2235 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2238 if (rfkill_register(hdev->rfkill) < 0) {
2239 rfkill_destroy(hdev->rfkill);
2240 hdev->rfkill = NULL;
2244 set_bit(HCI_SETUP, &hdev->dev_flags);
2246 if (hdev->dev_type != HCI_AMP)
2247 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
2249 hci_notify(hdev, HCI_DEV_REG);
2252 queue_work(hdev->req_workqueue, &hdev->power_on);
2257 destroy_workqueue(hdev->workqueue);
2258 destroy_workqueue(hdev->req_workqueue);
2260 ida_simple_remove(&hci_index_ida, hdev->id);
2261 write_lock(&hci_dev_list_lock);
2262 list_del(&hdev->list);
2263 write_unlock(&hci_dev_list_lock);
2267 EXPORT_SYMBOL(hci_register_dev);
2269 /* Unregister HCI device */
2270 void hci_unregister_dev(struct hci_dev *hdev)
2274 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2276 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
2280 write_lock(&hci_dev_list_lock);
2281 list_del(&hdev->list);
2282 write_unlock(&hci_dev_list_lock);
2284 hci_dev_do_close(hdev);
2286 for (i = 0; i < NUM_REASSEMBLY; i++)
2287 kfree_skb(hdev->reassembly[i]);
2289 cancel_work_sync(&hdev->power_on);
2291 if (!test_bit(HCI_INIT, &hdev->flags) &&
2292 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
2294 mgmt_index_removed(hdev);
2295 hci_dev_unlock(hdev);
2298 /* mgmt_index_removed should take care of emptying the
2300 BUG_ON(!list_empty(&hdev->mgmt_pending));
2302 hci_notify(hdev, HCI_DEV_UNREG);
2305 rfkill_unregister(hdev->rfkill);
2306 rfkill_destroy(hdev->rfkill);
2309 hci_del_sysfs(hdev);
2311 destroy_workqueue(hdev->workqueue);
2312 destroy_workqueue(hdev->req_workqueue);
2315 hci_blacklist_clear(hdev);
2316 hci_uuids_clear(hdev);
2317 hci_link_keys_clear(hdev);
2318 hci_smp_ltks_clear(hdev);
2319 hci_remote_oob_data_clear(hdev);
2320 hci_dev_unlock(hdev);
2324 ida_simple_remove(&hci_index_ida, id);
2326 EXPORT_SYMBOL(hci_unregister_dev);
2328 /* Suspend HCI device */
2329 int hci_suspend_dev(struct hci_dev *hdev)
2331 hci_notify(hdev, HCI_DEV_SUSPEND);
2334 EXPORT_SYMBOL(hci_suspend_dev);
2336 /* Resume HCI device */
2337 int hci_resume_dev(struct hci_dev *hdev)
2339 hci_notify(hdev, HCI_DEV_RESUME);
2342 EXPORT_SYMBOL(hci_resume_dev);
2344 /* Receive frame from HCI drivers */
2345 int hci_recv_frame(struct sk_buff *skb)
2347 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2348 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2349 && !test_bit(HCI_INIT, &hdev->flags))) {
2355 bt_cb(skb)->incoming = 1;
2358 __net_timestamp(skb);
2360 skb_queue_tail(&hdev->rx_q, skb);
2361 queue_work(hdev->workqueue, &hdev->rx_work);
2365 EXPORT_SYMBOL(hci_recv_frame);
2367 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
2368 int count, __u8 index)
2373 struct sk_buff *skb;
2374 struct bt_skb_cb *scb;
2376 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
2377 index >= NUM_REASSEMBLY)
2380 skb = hdev->reassembly[index];
2384 case HCI_ACLDATA_PKT:
2385 len = HCI_MAX_FRAME_SIZE;
2386 hlen = HCI_ACL_HDR_SIZE;
2389 len = HCI_MAX_EVENT_SIZE;
2390 hlen = HCI_EVENT_HDR_SIZE;
2392 case HCI_SCODATA_PKT:
2393 len = HCI_MAX_SCO_SIZE;
2394 hlen = HCI_SCO_HDR_SIZE;
2398 skb = bt_skb_alloc(len, GFP_ATOMIC);
2402 scb = (void *) skb->cb;
2404 scb->pkt_type = type;
2406 skb->dev = (void *) hdev;
2407 hdev->reassembly[index] = skb;
2411 scb = (void *) skb->cb;
2412 len = min_t(uint, scb->expect, count);
2414 memcpy(skb_put(skb, len), data, len);
2423 if (skb->len == HCI_EVENT_HDR_SIZE) {
2424 struct hci_event_hdr *h = hci_event_hdr(skb);
2425 scb->expect = h->plen;
2427 if (skb_tailroom(skb) < scb->expect) {
2429 hdev->reassembly[index] = NULL;
2435 case HCI_ACLDATA_PKT:
2436 if (skb->len == HCI_ACL_HDR_SIZE) {
2437 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2438 scb->expect = __le16_to_cpu(h->dlen);
2440 if (skb_tailroom(skb) < scb->expect) {
2442 hdev->reassembly[index] = NULL;
2448 case HCI_SCODATA_PKT:
2449 if (skb->len == HCI_SCO_HDR_SIZE) {
2450 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2451 scb->expect = h->dlen;
2453 if (skb_tailroom(skb) < scb->expect) {
2455 hdev->reassembly[index] = NULL;
2462 if (scb->expect == 0) {
2463 /* Complete frame */
2465 bt_cb(skb)->pkt_type = type;
2466 hci_recv_frame(skb);
2468 hdev->reassembly[index] = NULL;
2476 int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2480 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2484 rem = hci_reassembly(hdev, type, data, count, type - 1);
2488 data += (count - rem);
2494 EXPORT_SYMBOL(hci_recv_fragment);
2496 #define STREAM_REASSEMBLY 0
2498 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2504 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2507 struct { char type; } *pkt;
2509 /* Start of the frame */
2516 type = bt_cb(skb)->pkt_type;
2518 rem = hci_reassembly(hdev, type, data, count,
2523 data += (count - rem);
2529 EXPORT_SYMBOL(hci_recv_stream_fragment);
2531 /* ---- Interface to upper protocols ---- */
2533 int hci_register_cb(struct hci_cb *cb)
2535 BT_DBG("%p name %s", cb, cb->name);
2537 write_lock(&hci_cb_list_lock);
2538 list_add(&cb->list, &hci_cb_list);
2539 write_unlock(&hci_cb_list_lock);
2543 EXPORT_SYMBOL(hci_register_cb);
2545 int hci_unregister_cb(struct hci_cb *cb)
2547 BT_DBG("%p name %s", cb, cb->name);
2549 write_lock(&hci_cb_list_lock);
2550 list_del(&cb->list);
2551 write_unlock(&hci_cb_list_lock);
2555 EXPORT_SYMBOL(hci_unregister_cb);
2557 static int hci_send_frame(struct sk_buff *skb)
2559 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2566 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
2569 __net_timestamp(skb);
2571 /* Send copy to monitor */
2572 hci_send_to_monitor(hdev, skb);
2574 if (atomic_read(&hdev->promisc)) {
2575 /* Send copy to the sockets */
2576 hci_send_to_sock(hdev, skb);
2579 /* Get rid of skb owner, prior to sending to the driver. */
2582 return hdev->send(skb);
2585 void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
2587 skb_queue_head_init(&req->cmd_q);
2592 int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
2594 struct hci_dev *hdev = req->hdev;
2595 struct sk_buff *skb;
2596 unsigned long flags;
2598 BT_DBG("length %u", skb_queue_len(&req->cmd_q));
2600 /* If an error occured during request building, remove all HCI
2601 * commands queued on the HCI request queue.
2604 skb_queue_purge(&req->cmd_q);
2608 /* Do not allow empty requests */
2609 if (skb_queue_empty(&req->cmd_q))
2612 skb = skb_peek_tail(&req->cmd_q);
2613 bt_cb(skb)->req.complete = complete;
2615 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
2616 skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
2617 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
2619 queue_work(hdev->workqueue, &hdev->cmd_work);
2624 static struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode,
2625 u32 plen, const void *param)
2627 int len = HCI_COMMAND_HDR_SIZE + plen;
2628 struct hci_command_hdr *hdr;
2629 struct sk_buff *skb;
2631 skb = bt_skb_alloc(len, GFP_ATOMIC);
2635 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
2636 hdr->opcode = cpu_to_le16(opcode);
2640 memcpy(skb_put(skb, plen), param, plen);
2642 BT_DBG("skb len %d", skb->len);
2644 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
2645 skb->dev = (void *) hdev;
2650 /* Send HCI command */
2651 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
2654 struct sk_buff *skb;
2656 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2658 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2660 BT_ERR("%s no memory for command", hdev->name);
2664 /* Stand-alone HCI commands must be flaged as
2665 * single-command requests.
2667 bt_cb(skb)->req.start = true;
2669 skb_queue_tail(&hdev->cmd_q, skb);
2670 queue_work(hdev->workqueue, &hdev->cmd_work);
2675 /* Queue a command to an asynchronous HCI request */
2676 void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
2677 const void *param, u8 event)
2679 struct hci_dev *hdev = req->hdev;
2680 struct sk_buff *skb;
2682 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
2684 /* If an error occured during request building, there is no point in
2685 * queueing the HCI command. We can simply return.
2690 skb = hci_prepare_cmd(hdev, opcode, plen, param);
2692 BT_ERR("%s no memory for command (opcode 0x%4.4x)",
2693 hdev->name, opcode);
2698 if (skb_queue_empty(&req->cmd_q))
2699 bt_cb(skb)->req.start = true;
2701 bt_cb(skb)->req.event = event;
2703 skb_queue_tail(&req->cmd_q, skb);
2706 void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
2709 hci_req_add_ev(req, opcode, plen, param, 0);
2712 /* Get data from the previously sent command */
2713 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
2715 struct hci_command_hdr *hdr;
2717 if (!hdev->sent_cmd)
2720 hdr = (void *) hdev->sent_cmd->data;
2722 if (hdr->opcode != cpu_to_le16(opcode))
2725 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
2727 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2731 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2733 struct hci_acl_hdr *hdr;
2736 skb_push(skb, HCI_ACL_HDR_SIZE);
2737 skb_reset_transport_header(skb);
2738 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
2739 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2740 hdr->dlen = cpu_to_le16(len);
2743 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
2744 struct sk_buff *skb, __u16 flags)
2746 struct hci_conn *conn = chan->conn;
2747 struct hci_dev *hdev = conn->hdev;
2748 struct sk_buff *list;
2750 skb->len = skb_headlen(skb);
2753 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2755 switch (hdev->dev_type) {
2757 hci_add_acl_hdr(skb, conn->handle, flags);
2760 hci_add_acl_hdr(skb, chan->handle, flags);
2763 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
2767 list = skb_shinfo(skb)->frag_list;
2769 /* Non fragmented */
2770 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2772 skb_queue_tail(queue, skb);
2775 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2777 skb_shinfo(skb)->frag_list = NULL;
2779 /* Queue all fragments atomically */
2780 spin_lock(&queue->lock);
2782 __skb_queue_tail(queue, skb);
2784 flags &= ~ACL_START;
2787 skb = list; list = list->next;
2789 skb->dev = (void *) hdev;
2790 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2791 hci_add_acl_hdr(skb, conn->handle, flags);
2793 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2795 __skb_queue_tail(queue, skb);
2798 spin_unlock(&queue->lock);
2802 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2804 struct hci_dev *hdev = chan->conn->hdev;
2806 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
2808 skb->dev = (void *) hdev;
2810 hci_queue_acl(chan, &chan->data_q, skb, flags);
2812 queue_work(hdev->workqueue, &hdev->tx_work);
2816 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
2818 struct hci_dev *hdev = conn->hdev;
2819 struct hci_sco_hdr hdr;
2821 BT_DBG("%s len %d", hdev->name, skb->len);
2823 hdr.handle = cpu_to_le16(conn->handle);
2824 hdr.dlen = skb->len;
2826 skb_push(skb, HCI_SCO_HDR_SIZE);
2827 skb_reset_transport_header(skb);
2828 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
2830 skb->dev = (void *) hdev;
2831 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
2833 skb_queue_tail(&conn->data_q, skb);
2834 queue_work(hdev->workqueue, &hdev->tx_work);
2837 /* ---- HCI TX task (outgoing data) ---- */
2839 /* HCI Connection scheduler */
2840 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
2843 struct hci_conn_hash *h = &hdev->conn_hash;
2844 struct hci_conn *conn = NULL, *c;
2845 unsigned int num = 0, min = ~0;
2847 /* We don't have to lock device here. Connections are always
2848 * added and removed with TX task disabled. */
2852 list_for_each_entry_rcu(c, &h->list, list) {
2853 if (c->type != type || skb_queue_empty(&c->data_q))
2856 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2861 if (c->sent < min) {
2866 if (hci_conn_num(hdev, type) == num)
2875 switch (conn->type) {
2877 cnt = hdev->acl_cnt;
2881 cnt = hdev->sco_cnt;
2884 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2888 BT_ERR("Unknown link type");
2896 BT_DBG("conn %p quote %d", conn, *quote);
2900 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
2902 struct hci_conn_hash *h = &hdev->conn_hash;
2905 BT_ERR("%s link tx timeout", hdev->name);
2909 /* Kill stalled connections */
2910 list_for_each_entry_rcu(c, &h->list, list) {
2911 if (c->type == type && c->sent) {
2912 BT_ERR("%s killing stalled connection %pMR",
2913 hdev->name, &c->dst);
2914 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
2921 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2924 struct hci_conn_hash *h = &hdev->conn_hash;
2925 struct hci_chan *chan = NULL;
2926 unsigned int num = 0, min = ~0, cur_prio = 0;
2927 struct hci_conn *conn;
2928 int cnt, q, conn_num = 0;
2930 BT_DBG("%s", hdev->name);
2934 list_for_each_entry_rcu(conn, &h->list, list) {
2935 struct hci_chan *tmp;
2937 if (conn->type != type)
2940 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2945 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
2946 struct sk_buff *skb;
2948 if (skb_queue_empty(&tmp->data_q))
2951 skb = skb_peek(&tmp->data_q);
2952 if (skb->priority < cur_prio)
2955 if (skb->priority > cur_prio) {
2958 cur_prio = skb->priority;
2963 if (conn->sent < min) {
2969 if (hci_conn_num(hdev, type) == conn_num)
2978 switch (chan->conn->type) {
2980 cnt = hdev->acl_cnt;
2983 cnt = hdev->block_cnt;
2987 cnt = hdev->sco_cnt;
2990 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2994 BT_ERR("Unknown link type");
2999 BT_DBG("chan %p quote %d", chan, *quote);
3003 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3005 struct hci_conn_hash *h = &hdev->conn_hash;
3006 struct hci_conn *conn;
3009 BT_DBG("%s", hdev->name);
3013 list_for_each_entry_rcu(conn, &h->list, list) {
3014 struct hci_chan *chan;
3016 if (conn->type != type)
3019 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3024 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3025 struct sk_buff *skb;
3032 if (skb_queue_empty(&chan->data_q))
3035 skb = skb_peek(&chan->data_q);
3036 if (skb->priority >= HCI_PRIO_MAX - 1)
3039 skb->priority = HCI_PRIO_MAX - 1;
3041 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3045 if (hci_conn_num(hdev, type) == num)
3053 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3055 /* Calculate count of blocks used by this packet */
3056 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3059 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3061 if (!test_bit(HCI_RAW, &hdev->flags)) {
3062 /* ACL tx timeout must be longer than maximum
3063 * link supervision timeout (40.9 seconds) */
3064 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3065 HCI_ACL_TX_TIMEOUT))
3066 hci_link_tx_to(hdev, ACL_LINK);
3070 static void hci_sched_acl_pkt(struct hci_dev *hdev)
3072 unsigned int cnt = hdev->acl_cnt;
3073 struct hci_chan *chan;
3074 struct sk_buff *skb;
3077 __check_timeout(hdev, cnt);
3079 while (hdev->acl_cnt &&
3080 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3081 u32 priority = (skb_peek(&chan->data_q))->priority;
3082 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3083 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3084 skb->len, skb->priority);
3086 /* Stop if priority has changed */
3087 if (skb->priority < priority)
3090 skb = skb_dequeue(&chan->data_q);
3092 hci_conn_enter_active_mode(chan->conn,
3093 bt_cb(skb)->force_active);
3095 hci_send_frame(skb);
3096 hdev->acl_last_tx = jiffies;
3104 if (cnt != hdev->acl_cnt)
3105 hci_prio_recalculate(hdev, ACL_LINK);
3108 static void hci_sched_acl_blk(struct hci_dev *hdev)
3110 unsigned int cnt = hdev->block_cnt;
3111 struct hci_chan *chan;
3112 struct sk_buff *skb;
3116 __check_timeout(hdev, cnt);
3118 BT_DBG("%s", hdev->name);
3120 if (hdev->dev_type == HCI_AMP)
3125 while (hdev->block_cnt > 0 &&
3126 (chan = hci_chan_sent(hdev, type, "e))) {
3127 u32 priority = (skb_peek(&chan->data_q))->priority;
3128 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3131 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3132 skb->len, skb->priority);
3134 /* Stop if priority has changed */
3135 if (skb->priority < priority)
3138 skb = skb_dequeue(&chan->data_q);
3140 blocks = __get_blocks(hdev, skb);
3141 if (blocks > hdev->block_cnt)
3144 hci_conn_enter_active_mode(chan->conn,
3145 bt_cb(skb)->force_active);
3147 hci_send_frame(skb);
3148 hdev->acl_last_tx = jiffies;
3150 hdev->block_cnt -= blocks;
3153 chan->sent += blocks;
3154 chan->conn->sent += blocks;
3158 if (cnt != hdev->block_cnt)
3159 hci_prio_recalculate(hdev, type);
3162 static void hci_sched_acl(struct hci_dev *hdev)
3164 BT_DBG("%s", hdev->name);
3166 /* No ACL link over BR/EDR controller */
3167 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3170 /* No AMP link over AMP controller */
3171 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3174 switch (hdev->flow_ctl_mode) {
3175 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3176 hci_sched_acl_pkt(hdev);
3179 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3180 hci_sched_acl_blk(hdev);
3186 static void hci_sched_sco(struct hci_dev *hdev)
3188 struct hci_conn *conn;
3189 struct sk_buff *skb;
3192 BT_DBG("%s", hdev->name);
3194 if (!hci_conn_num(hdev, SCO_LINK))
3197 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3198 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3199 BT_DBG("skb %p len %d", skb, skb->len);
3200 hci_send_frame(skb);
3203 if (conn->sent == ~0)
3209 static void hci_sched_esco(struct hci_dev *hdev)
3211 struct hci_conn *conn;
3212 struct sk_buff *skb;
3215 BT_DBG("%s", hdev->name);
3217 if (!hci_conn_num(hdev, ESCO_LINK))
3220 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3222 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3223 BT_DBG("skb %p len %d", skb, skb->len);
3224 hci_send_frame(skb);
3227 if (conn->sent == ~0)
3233 static void hci_sched_le(struct hci_dev *hdev)
3235 struct hci_chan *chan;
3236 struct sk_buff *skb;
3237 int quote, cnt, tmp;
3239 BT_DBG("%s", hdev->name);
3241 if (!hci_conn_num(hdev, LE_LINK))
3244 if (!test_bit(HCI_RAW, &hdev->flags)) {
3245 /* LE tx timeout must be longer than maximum
3246 * link supervision timeout (40.9 seconds) */
3247 if (!hdev->le_cnt && hdev->le_pkts &&
3248 time_after(jiffies, hdev->le_last_tx + HZ * 45))
3249 hci_link_tx_to(hdev, LE_LINK);
3252 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3254 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3255 u32 priority = (skb_peek(&chan->data_q))->priority;
3256 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3257 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3258 skb->len, skb->priority);
3260 /* Stop if priority has changed */
3261 if (skb->priority < priority)
3264 skb = skb_dequeue(&chan->data_q);
3266 hci_send_frame(skb);
3267 hdev->le_last_tx = jiffies;
3278 hdev->acl_cnt = cnt;
3281 hci_prio_recalculate(hdev, LE_LINK);
3284 static void hci_tx_work(struct work_struct *work)
3286 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3287 struct sk_buff *skb;
3289 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
3290 hdev->sco_cnt, hdev->le_cnt);
3292 /* Schedule queues and send stuff to HCI driver */
3294 hci_sched_acl(hdev);
3296 hci_sched_sco(hdev);
3298 hci_sched_esco(hdev);
3302 /* Send next queued raw (unknown type) packet */
3303 while ((skb = skb_dequeue(&hdev->raw_q)))
3304 hci_send_frame(skb);
3307 /* ----- HCI RX task (incoming data processing) ----- */
3309 /* ACL data packet */
3310 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3312 struct hci_acl_hdr *hdr = (void *) skb->data;
3313 struct hci_conn *conn;
3314 __u16 handle, flags;
3316 skb_pull(skb, HCI_ACL_HDR_SIZE);
3318 handle = __le16_to_cpu(hdr->handle);
3319 flags = hci_flags(handle);
3320 handle = hci_handle(handle);
3322 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3325 hdev->stat.acl_rx++;
3328 conn = hci_conn_hash_lookup_handle(hdev, handle);
3329 hci_dev_unlock(hdev);
3332 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3334 /* Send to upper protocol */
3335 l2cap_recv_acldata(conn, skb, flags);
3338 BT_ERR("%s ACL packet for unknown connection handle %d",
3339 hdev->name, handle);
3345 /* SCO data packet */
3346 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3348 struct hci_sco_hdr *hdr = (void *) skb->data;
3349 struct hci_conn *conn;
3352 skb_pull(skb, HCI_SCO_HDR_SIZE);
3354 handle = __le16_to_cpu(hdr->handle);
3356 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
3358 hdev->stat.sco_rx++;
3361 conn = hci_conn_hash_lookup_handle(hdev, handle);
3362 hci_dev_unlock(hdev);
3365 /* Send to upper protocol */
3366 sco_recv_scodata(conn, skb);
3369 BT_ERR("%s SCO packet for unknown connection handle %d",
3370 hdev->name, handle);
3376 static bool hci_req_is_complete(struct hci_dev *hdev)
3378 struct sk_buff *skb;
3380 skb = skb_peek(&hdev->cmd_q);
3384 return bt_cb(skb)->req.start;
3387 static void hci_resend_last(struct hci_dev *hdev)
3389 struct hci_command_hdr *sent;
3390 struct sk_buff *skb;
3393 if (!hdev->sent_cmd)
3396 sent = (void *) hdev->sent_cmd->data;
3397 opcode = __le16_to_cpu(sent->opcode);
3398 if (opcode == HCI_OP_RESET)
3401 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3405 skb_queue_head(&hdev->cmd_q, skb);
3406 queue_work(hdev->workqueue, &hdev->cmd_work);
3409 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
3411 hci_req_complete_t req_complete = NULL;
3412 struct sk_buff *skb;
3413 unsigned long flags;
3415 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3417 /* If the completed command doesn't match the last one that was
3418 * sent we need to do special handling of it.
3420 if (!hci_sent_cmd_data(hdev, opcode)) {
3421 /* Some CSR based controllers generate a spontaneous
3422 * reset complete event during init and any pending
3423 * command will never be completed. In such a case we
3424 * need to resend whatever was the last sent
3427 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3428 hci_resend_last(hdev);
3433 /* If the command succeeded and there's still more commands in
3434 * this request the request is not yet complete.
3436 if (!status && !hci_req_is_complete(hdev))
3439 /* If this was the last command in a request the complete
3440 * callback would be found in hdev->sent_cmd instead of the
3441 * command queue (hdev->cmd_q).
3443 if (hdev->sent_cmd) {
3444 req_complete = bt_cb(hdev->sent_cmd)->req.complete;
3449 /* Remove all pending commands belonging to this request */
3450 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
3451 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
3452 if (bt_cb(skb)->req.start) {
3453 __skb_queue_head(&hdev->cmd_q, skb);
3457 req_complete = bt_cb(skb)->req.complete;
3460 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
3464 req_complete(hdev, status);
3467 static void hci_rx_work(struct work_struct *work)
3469 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
3470 struct sk_buff *skb;
3472 BT_DBG("%s", hdev->name);
3474 while ((skb = skb_dequeue(&hdev->rx_q))) {
3475 /* Send copy to monitor */
3476 hci_send_to_monitor(hdev, skb);
3478 if (atomic_read(&hdev->promisc)) {
3479 /* Send copy to the sockets */
3480 hci_send_to_sock(hdev, skb);
3483 if (test_bit(HCI_RAW, &hdev->flags)) {
3488 if (test_bit(HCI_INIT, &hdev->flags)) {
3489 /* Don't process data packets in this states. */
3490 switch (bt_cb(skb)->pkt_type) {
3491 case HCI_ACLDATA_PKT:
3492 case HCI_SCODATA_PKT:
3499 switch (bt_cb(skb)->pkt_type) {
3501 BT_DBG("%s Event packet", hdev->name);
3502 hci_event_packet(hdev, skb);
3505 case HCI_ACLDATA_PKT:
3506 BT_DBG("%s ACL data packet", hdev->name);
3507 hci_acldata_packet(hdev, skb);
3510 case HCI_SCODATA_PKT:
3511 BT_DBG("%s SCO data packet", hdev->name);
3512 hci_scodata_packet(hdev, skb);
3522 static void hci_cmd_work(struct work_struct *work)
3524 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
3525 struct sk_buff *skb;
3527 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
3528 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
3530 /* Send queued commands */
3531 if (atomic_read(&hdev->cmd_cnt)) {
3532 skb = skb_dequeue(&hdev->cmd_q);
3536 kfree_skb(hdev->sent_cmd);
3538 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
3539 if (hdev->sent_cmd) {
3540 atomic_dec(&hdev->cmd_cnt);
3541 hci_send_frame(skb);
3542 if (test_bit(HCI_RESET, &hdev->flags))
3543 del_timer(&hdev->cmd_timer);
3545 mod_timer(&hdev->cmd_timer,
3546 jiffies + HCI_CMD_TIMEOUT);
3548 skb_queue_head(&hdev->cmd_q, skb);
3549 queue_work(hdev->workqueue, &hdev->cmd_work);
3554 int hci_do_inquiry(struct hci_dev *hdev, u8 length)
3556 /* General inquiry access code (GIAC) */
3557 u8 lap[3] = { 0x33, 0x8b, 0x9e };
3558 struct hci_cp_inquiry cp;
3560 BT_DBG("%s", hdev->name);
3562 if (test_bit(HCI_INQUIRY, &hdev->flags))
3563 return -EINPROGRESS;
3565 inquiry_cache_flush(hdev);
3567 memset(&cp, 0, sizeof(cp));
3568 memcpy(&cp.lap, lap, sizeof(cp.lap));
3571 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
3574 int hci_cancel_inquiry(struct hci_dev *hdev)
3576 BT_DBG("%s", hdev->name);
3578 if (!test_bit(HCI_INQUIRY, &hdev->flags))
3581 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
3584 u8 bdaddr_to_le(u8 bdaddr_type)
3586 switch (bdaddr_type) {
3587 case BDADDR_LE_PUBLIC:
3588 return ADDR_LE_DEV_PUBLIC;
3591 /* Fallback to LE Random address type */
3592 return ADDR_LE_DEV_RANDOM;