2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
26 /* Bluetooth HCI core. */
28 #include <linux/export.h>
29 #include <linux/idr.h>
30 #include <linux/rfkill.h>
31 #include <linux/debugfs.h>
32 #include <linux/crypto.h>
33 #include <asm/unaligned.h>
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37 #include <net/bluetooth/l2cap.h>
38 #include <net/bluetooth/mgmt.h>
40 #include "hci_request.h"
41 #include "hci_debugfs.h"
44 static void hci_rx_work(struct work_struct *work);
45 static void hci_cmd_work(struct work_struct *work);
46 static void hci_tx_work(struct work_struct *work);
49 LIST_HEAD(hci_dev_list);
50 DEFINE_RWLOCK(hci_dev_list_lock);
52 /* HCI callback list */
53 LIST_HEAD(hci_cb_list);
54 DEFINE_MUTEX(hci_cb_list_lock);
56 /* HCI ID Numbering */
57 static DEFINE_IDA(hci_index_ida);
59 /* ----- HCI requests ----- */
61 #define HCI_REQ_DONE 0
62 #define HCI_REQ_PEND 1
63 #define HCI_REQ_CANCELED 2
65 #define hci_req_lock(d) mutex_lock(&d->req_lock)
66 #define hci_req_unlock(d) mutex_unlock(&d->req_lock)
68 /* ---- HCI notifications ---- */
70 static void hci_notify(struct hci_dev *hdev, int event)
72 hci_sock_dev_event(hdev, event);
75 /* ---- HCI debugfs entries ---- */
77 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
78 size_t count, loff_t *ppos)
80 struct hci_dev *hdev = file->private_data;
83 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y': 'N';
86 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
89 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
90 size_t count, loff_t *ppos)
92 struct hci_dev *hdev = file->private_data;
95 size_t buf_size = min(count, (sizeof(buf)-1));
99 if (!test_bit(HCI_UP, &hdev->flags))
102 if (copy_from_user(buf, user_buf, buf_size))
105 buf[buf_size] = '\0';
106 if (strtobool(buf, &enable))
109 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
114 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
117 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
119 hci_req_unlock(hdev);
124 err = -bt_to_errno(skb->data[0]);
130 hci_dev_change_flag(hdev, HCI_DUT_MODE);
135 static const struct file_operations dut_mode_fops = {
137 .read = dut_mode_read,
138 .write = dut_mode_write,
139 .llseek = default_llseek,
142 /* ---- HCI requests ---- */
144 static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode)
146 BT_DBG("%s result 0x%2.2x", hdev->name, result);
148 if (hdev->req_status == HCI_REQ_PEND) {
149 hdev->req_result = result;
150 hdev->req_status = HCI_REQ_DONE;
151 wake_up_interruptible(&hdev->req_wait_q);
155 static void hci_req_cancel(struct hci_dev *hdev, int err)
157 BT_DBG("%s err 0x%2.2x", hdev->name, err);
159 if (hdev->req_status == HCI_REQ_PEND) {
160 hdev->req_result = err;
161 hdev->req_status = HCI_REQ_CANCELED;
162 wake_up_interruptible(&hdev->req_wait_q);
166 static struct sk_buff *hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
169 struct hci_ev_cmd_complete *ev;
170 struct hci_event_hdr *hdr;
175 skb = hdev->recv_evt;
176 hdev->recv_evt = NULL;
178 hci_dev_unlock(hdev);
181 return ERR_PTR(-ENODATA);
183 if (skb->len < sizeof(*hdr)) {
184 BT_ERR("Too short HCI event");
188 hdr = (void *) skb->data;
189 skb_pull(skb, HCI_EVENT_HDR_SIZE);
192 if (hdr->evt != event)
197 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
198 BT_DBG("Last event is not cmd complete (0x%2.2x)", hdr->evt);
202 if (skb->len < sizeof(*ev)) {
203 BT_ERR("Too short cmd_complete event");
207 ev = (void *) skb->data;
208 skb_pull(skb, sizeof(*ev));
210 if (opcode == __le16_to_cpu(ev->opcode))
213 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
214 __le16_to_cpu(ev->opcode));
218 return ERR_PTR(-ENODATA);
221 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
222 const void *param, u8 event, u32 timeout)
224 DECLARE_WAITQUEUE(wait, current);
225 struct hci_request req;
228 BT_DBG("%s", hdev->name);
230 hci_req_init(&req, hdev);
232 hci_req_add_ev(&req, opcode, plen, param, event);
234 hdev->req_status = HCI_REQ_PEND;
236 add_wait_queue(&hdev->req_wait_q, &wait);
237 set_current_state(TASK_INTERRUPTIBLE);
239 err = hci_req_run(&req, hci_req_sync_complete);
241 remove_wait_queue(&hdev->req_wait_q, &wait);
242 set_current_state(TASK_RUNNING);
246 schedule_timeout(timeout);
248 remove_wait_queue(&hdev->req_wait_q, &wait);
250 if (signal_pending(current))
251 return ERR_PTR(-EINTR);
253 switch (hdev->req_status) {
255 err = -bt_to_errno(hdev->req_result);
258 case HCI_REQ_CANCELED:
259 err = -hdev->req_result;
267 hdev->req_status = hdev->req_result = 0;
269 BT_DBG("%s end: err %d", hdev->name, err);
274 return hci_get_cmd_complete(hdev, opcode, event);
276 EXPORT_SYMBOL(__hci_cmd_sync_ev);
278 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
279 const void *param, u32 timeout)
281 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
283 EXPORT_SYMBOL(__hci_cmd_sync);
285 /* Execute request and wait for completion. */
286 static int __hci_req_sync(struct hci_dev *hdev,
287 void (*func)(struct hci_request *req,
289 unsigned long opt, __u32 timeout)
291 struct hci_request req;
292 DECLARE_WAITQUEUE(wait, current);
295 BT_DBG("%s start", hdev->name);
297 hci_req_init(&req, hdev);
299 hdev->req_status = HCI_REQ_PEND;
303 add_wait_queue(&hdev->req_wait_q, &wait);
304 set_current_state(TASK_INTERRUPTIBLE);
306 err = hci_req_run(&req, hci_req_sync_complete);
308 hdev->req_status = 0;
310 remove_wait_queue(&hdev->req_wait_q, &wait);
311 set_current_state(TASK_RUNNING);
313 /* ENODATA means the HCI request command queue is empty.
314 * This can happen when a request with conditionals doesn't
315 * trigger any commands to be sent. This is normal behavior
316 * and should not trigger an error return.
324 schedule_timeout(timeout);
326 remove_wait_queue(&hdev->req_wait_q, &wait);
328 if (signal_pending(current))
331 switch (hdev->req_status) {
333 err = -bt_to_errno(hdev->req_result);
336 case HCI_REQ_CANCELED:
337 err = -hdev->req_result;
345 hdev->req_status = hdev->req_result = 0;
347 BT_DBG("%s end: err %d", hdev->name, err);
352 static int hci_req_sync(struct hci_dev *hdev,
353 void (*req)(struct hci_request *req,
355 unsigned long opt, __u32 timeout)
359 if (!test_bit(HCI_UP, &hdev->flags))
362 /* Serialize all requests */
364 ret = __hci_req_sync(hdev, req, opt, timeout);
365 hci_req_unlock(hdev);
370 static void hci_reset_req(struct hci_request *req, unsigned long opt)
372 BT_DBG("%s %ld", req->hdev->name, opt);
375 set_bit(HCI_RESET, &req->hdev->flags);
376 hci_req_add(req, HCI_OP_RESET, 0, NULL);
379 static void bredr_init(struct hci_request *req)
381 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
383 /* Read Local Supported Features */
384 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
386 /* Read Local Version */
387 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
389 /* Read BD Address */
390 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
393 static void amp_init1(struct hci_request *req)
395 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
397 /* Read Local Version */
398 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
400 /* Read Local Supported Commands */
401 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
403 /* Read Local AMP Info */
404 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
406 /* Read Data Blk size */
407 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
409 /* Read Flow Control Mode */
410 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
412 /* Read Location Data */
413 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
416 static void amp_init2(struct hci_request *req)
418 /* Read Local Supported Features. Not all AMP controllers
419 * support this so it's placed conditionally in the second
422 if (req->hdev->commands[14] & 0x20)
423 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
426 static void hci_init1_req(struct hci_request *req, unsigned long opt)
428 struct hci_dev *hdev = req->hdev;
430 BT_DBG("%s %ld", hdev->name, opt);
433 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
434 hci_reset_req(req, 0);
436 switch (hdev->dev_type) {
446 BT_ERR("Unknown device type %d", hdev->dev_type);
451 static void bredr_setup(struct hci_request *req)
456 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
457 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
459 /* Read Class of Device */
460 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
462 /* Read Local Name */
463 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
465 /* Read Voice Setting */
466 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
468 /* Read Number of Supported IAC */
469 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
471 /* Read Current IAC LAP */
472 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
474 /* Clear Event Filters */
475 flt_type = HCI_FLT_CLEAR_ALL;
476 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
478 /* Connection accept timeout ~20 secs */
479 param = cpu_to_le16(0x7d00);
480 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
483 static void le_setup(struct hci_request *req)
485 struct hci_dev *hdev = req->hdev;
487 /* Read LE Buffer Size */
488 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
490 /* Read LE Local Supported Features */
491 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
493 /* Read LE Supported States */
494 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
496 /* Read LE White List Size */
497 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
499 /* Clear LE White List */
500 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
502 /* LE-only controllers have LE implicitly enabled */
503 if (!lmp_bredr_capable(hdev))
504 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
507 static void hci_setup_event_mask(struct hci_request *req)
509 struct hci_dev *hdev = req->hdev;
511 /* The second byte is 0xff instead of 0x9f (two reserved bits
512 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
515 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
517 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
518 * any event mask for pre 1.2 devices.
520 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
523 if (lmp_bredr_capable(hdev)) {
524 events[4] |= 0x01; /* Flow Specification Complete */
525 events[4] |= 0x02; /* Inquiry Result with RSSI */
526 events[4] |= 0x04; /* Read Remote Extended Features Complete */
527 events[5] |= 0x08; /* Synchronous Connection Complete */
528 events[5] |= 0x10; /* Synchronous Connection Changed */
530 /* Use a different default for LE-only devices */
531 memset(events, 0, sizeof(events));
532 events[0] |= 0x10; /* Disconnection Complete */
533 events[1] |= 0x08; /* Read Remote Version Information Complete */
534 events[1] |= 0x20; /* Command Complete */
535 events[1] |= 0x40; /* Command Status */
536 events[1] |= 0x80; /* Hardware Error */
537 events[2] |= 0x04; /* Number of Completed Packets */
538 events[3] |= 0x02; /* Data Buffer Overflow */
540 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
541 events[0] |= 0x80; /* Encryption Change */
542 events[5] |= 0x80; /* Encryption Key Refresh Complete */
546 if (lmp_inq_rssi_capable(hdev))
547 events[4] |= 0x02; /* Inquiry Result with RSSI */
549 if (lmp_sniffsubr_capable(hdev))
550 events[5] |= 0x20; /* Sniff Subrating */
552 if (lmp_pause_enc_capable(hdev))
553 events[5] |= 0x80; /* Encryption Key Refresh Complete */
555 if (lmp_ext_inq_capable(hdev))
556 events[5] |= 0x40; /* Extended Inquiry Result */
558 if (lmp_no_flush_capable(hdev))
559 events[7] |= 0x01; /* Enhanced Flush Complete */
561 if (lmp_lsto_capable(hdev))
562 events[6] |= 0x80; /* Link Supervision Timeout Changed */
564 if (lmp_ssp_capable(hdev)) {
565 events[6] |= 0x01; /* IO Capability Request */
566 events[6] |= 0x02; /* IO Capability Response */
567 events[6] |= 0x04; /* User Confirmation Request */
568 events[6] |= 0x08; /* User Passkey Request */
569 events[6] |= 0x10; /* Remote OOB Data Request */
570 events[6] |= 0x20; /* Simple Pairing Complete */
571 events[7] |= 0x04; /* User Passkey Notification */
572 events[7] |= 0x08; /* Keypress Notification */
573 events[7] |= 0x10; /* Remote Host Supported
574 * Features Notification
578 if (lmp_le_capable(hdev))
579 events[7] |= 0x20; /* LE Meta-Event */
581 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
584 static void hci_init2_req(struct hci_request *req, unsigned long opt)
586 struct hci_dev *hdev = req->hdev;
588 if (hdev->dev_type == HCI_AMP)
589 return amp_init2(req);
591 if (lmp_bredr_capable(hdev))
594 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
596 if (lmp_le_capable(hdev))
599 /* All Bluetooth 1.2 and later controllers should support the
600 * HCI command for reading the local supported commands.
602 * Unfortunately some controllers indicate Bluetooth 1.2 support,
603 * but do not have support for this command. If that is the case,
604 * the driver can quirk the behavior and skip reading the local
605 * supported commands.
607 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
608 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
609 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
611 if (lmp_ssp_capable(hdev)) {
612 /* When SSP is available, then the host features page
613 * should also be available as well. However some
614 * controllers list the max_page as 0 as long as SSP
615 * has not been enabled. To achieve proper debugging
616 * output, force the minimum max_page to 1 at least.
618 hdev->max_page = 0x01;
620 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
623 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
624 sizeof(mode), &mode);
626 struct hci_cp_write_eir cp;
628 memset(hdev->eir, 0, sizeof(hdev->eir));
629 memset(&cp, 0, sizeof(cp));
631 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
635 if (lmp_inq_rssi_capable(hdev) ||
636 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
639 /* If Extended Inquiry Result events are supported, then
640 * they are clearly preferred over Inquiry Result with RSSI
643 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
645 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
648 if (lmp_inq_tx_pwr_capable(hdev))
649 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
651 if (lmp_ext_feat_capable(hdev)) {
652 struct hci_cp_read_local_ext_features cp;
655 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
659 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
661 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
666 static void hci_setup_link_policy(struct hci_request *req)
668 struct hci_dev *hdev = req->hdev;
669 struct hci_cp_write_def_link_policy cp;
672 if (lmp_rswitch_capable(hdev))
673 link_policy |= HCI_LP_RSWITCH;
674 if (lmp_hold_capable(hdev))
675 link_policy |= HCI_LP_HOLD;
676 if (lmp_sniff_capable(hdev))
677 link_policy |= HCI_LP_SNIFF;
678 if (lmp_park_capable(hdev))
679 link_policy |= HCI_LP_PARK;
681 cp.policy = cpu_to_le16(link_policy);
682 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
685 static void hci_set_le_support(struct hci_request *req)
687 struct hci_dev *hdev = req->hdev;
688 struct hci_cp_write_le_host_supported cp;
690 /* LE-only devices do not support explicit enablement */
691 if (!lmp_bredr_capable(hdev))
694 memset(&cp, 0, sizeof(cp));
696 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
701 if (cp.le != lmp_host_le_capable(hdev))
702 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
706 static void hci_set_event_mask_page_2(struct hci_request *req)
708 struct hci_dev *hdev = req->hdev;
709 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
711 /* If Connectionless Slave Broadcast master role is supported
712 * enable all necessary events for it.
714 if (lmp_csb_master_capable(hdev)) {
715 events[1] |= 0x40; /* Triggered Clock Capture */
716 events[1] |= 0x80; /* Synchronization Train Complete */
717 events[2] |= 0x10; /* Slave Page Response Timeout */
718 events[2] |= 0x20; /* CSB Channel Map Change */
721 /* If Connectionless Slave Broadcast slave role is supported
722 * enable all necessary events for it.
724 if (lmp_csb_slave_capable(hdev)) {
725 events[2] |= 0x01; /* Synchronization Train Received */
726 events[2] |= 0x02; /* CSB Receive */
727 events[2] |= 0x04; /* CSB Timeout */
728 events[2] |= 0x08; /* Truncated Page Complete */
731 /* Enable Authenticated Payload Timeout Expired event if supported */
732 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
735 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
738 static void hci_init3_req(struct hci_request *req, unsigned long opt)
740 struct hci_dev *hdev = req->hdev;
743 hci_setup_event_mask(req);
745 if (hdev->commands[6] & 0x20) {
746 struct hci_cp_read_stored_link_key cp;
748 bacpy(&cp.bdaddr, BDADDR_ANY);
750 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
753 if (hdev->commands[5] & 0x10)
754 hci_setup_link_policy(req);
756 if (hdev->commands[8] & 0x01)
757 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
759 /* Some older Broadcom based Bluetooth 1.2 controllers do not
760 * support the Read Page Scan Type command. Check support for
761 * this command in the bit mask of supported commands.
763 if (hdev->commands[13] & 0x01)
764 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
766 if (lmp_le_capable(hdev)) {
769 memset(events, 0, sizeof(events));
772 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
773 events[0] |= 0x10; /* LE Long Term Key Request */
775 /* If controller supports the Connection Parameters Request
776 * Link Layer Procedure, enable the corresponding event.
778 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
779 events[0] |= 0x20; /* LE Remote Connection
783 /* If the controller supports the Data Length Extension
784 * feature, enable the corresponding event.
786 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
787 events[0] |= 0x40; /* LE Data Length Change */
789 /* If the controller supports Extended Scanner Filter
790 * Policies, enable the correspondig event.
792 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
793 events[1] |= 0x04; /* LE Direct Advertising
797 /* If the controller supports the LE Read Local P-256
798 * Public Key command, enable the corresponding event.
800 if (hdev->commands[34] & 0x02)
801 events[0] |= 0x80; /* LE Read Local P-256
802 * Public Key Complete
805 /* If the controller supports the LE Generate DHKey
806 * command, enable the corresponding event.
808 if (hdev->commands[34] & 0x04)
809 events[1] |= 0x01; /* LE Generate DHKey Complete */
811 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
814 if (hdev->commands[25] & 0x40) {
815 /* Read LE Advertising Channel TX Power */
816 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
819 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
820 /* Read LE Maximum Data Length */
821 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
823 /* Read LE Suggested Default Data Length */
824 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
827 hci_set_le_support(req);
830 /* Read features beyond page 1 if available */
831 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
832 struct hci_cp_read_local_ext_features cp;
835 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
840 static void hci_init4_req(struct hci_request *req, unsigned long opt)
842 struct hci_dev *hdev = req->hdev;
844 /* Some Broadcom based Bluetooth controllers do not support the
845 * Delete Stored Link Key command. They are clearly indicating its
846 * absence in the bit mask of supported commands.
848 * Check the supported commands and only if the the command is marked
849 * as supported send it. If not supported assume that the controller
850 * does not have actual support for stored link keys which makes this
851 * command redundant anyway.
853 * Some controllers indicate that they support handling deleting
854 * stored link keys, but they don't. The quirk lets a driver
855 * just disable this command.
857 if (hdev->commands[6] & 0x80 &&
858 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
859 struct hci_cp_delete_stored_link_key cp;
861 bacpy(&cp.bdaddr, BDADDR_ANY);
862 cp.delete_all = 0x01;
863 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
867 /* Set event mask page 2 if the HCI command for it is supported */
868 if (hdev->commands[22] & 0x04)
869 hci_set_event_mask_page_2(req);
871 /* Read local codec list if the HCI command is supported */
872 if (hdev->commands[29] & 0x20)
873 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
875 /* Get MWS transport configuration if the HCI command is supported */
876 if (hdev->commands[30] & 0x08)
877 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
879 /* Check for Synchronization Train support */
880 if (lmp_sync_train_capable(hdev))
881 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
883 /* Enable Secure Connections if supported and configured */
884 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
885 bredr_sc_enabled(hdev)) {
888 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
889 sizeof(support), &support);
893 static int __hci_init(struct hci_dev *hdev)
897 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
901 /* The Device Under Test (DUT) mode is special and available for
902 * all controller types. So just create it early on.
904 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
905 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
909 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
913 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
914 * BR/EDR/LE type controllers. AMP controllers only need the
915 * first two stages of init.
917 if (hdev->dev_type != HCI_BREDR)
920 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
924 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
928 /* This function is only called when the controller is actually in
929 * configured state. When the controller is marked as unconfigured,
930 * this initialization procedure is not run.
932 * It means that it is possible that a controller runs through its
933 * setup phase and then discovers missing settings. If that is the
934 * case, then this function will not be called. It then will only
935 * be called during the config phase.
937 * So only when in setup phase or config phase, create the debugfs
938 * entries and register the SMP channels.
940 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
941 !hci_dev_test_flag(hdev, HCI_CONFIG))
944 hci_debugfs_create_common(hdev);
946 if (lmp_bredr_capable(hdev))
947 hci_debugfs_create_bredr(hdev);
949 if (lmp_le_capable(hdev))
950 hci_debugfs_create_le(hdev);
955 static void hci_init0_req(struct hci_request *req, unsigned long opt)
957 struct hci_dev *hdev = req->hdev;
959 BT_DBG("%s %ld", hdev->name, opt);
962 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
963 hci_reset_req(req, 0);
965 /* Read Local Version */
966 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
968 /* Read BD Address */
969 if (hdev->set_bdaddr)
970 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
973 static int __hci_unconf_init(struct hci_dev *hdev)
977 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
980 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
987 static void hci_scan_req(struct hci_request *req, unsigned long opt)
991 BT_DBG("%s %x", req->hdev->name, scan);
993 /* Inquiry and Page scans */
994 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
997 static void hci_auth_req(struct hci_request *req, unsigned long opt)
1001 BT_DBG("%s %x", req->hdev->name, auth);
1003 /* Authentication */
1004 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1007 static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
1011 BT_DBG("%s %x", req->hdev->name, encrypt);
1014 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1017 static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
1019 __le16 policy = cpu_to_le16(opt);
1021 BT_DBG("%s %x", req->hdev->name, policy);
1023 /* Default link policy */
1024 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1027 /* Get HCI device by index.
1028 * Device is held on return. */
1029 struct hci_dev *hci_dev_get(int index)
1031 struct hci_dev *hdev = NULL, *d;
1033 BT_DBG("%d", index);
1038 read_lock(&hci_dev_list_lock);
1039 list_for_each_entry(d, &hci_dev_list, list) {
1040 if (d->id == index) {
1041 hdev = hci_dev_hold(d);
1045 read_unlock(&hci_dev_list_lock);
1049 /* ---- Inquiry support ---- */
1051 bool hci_discovery_active(struct hci_dev *hdev)
1053 struct discovery_state *discov = &hdev->discovery;
1055 switch (discov->state) {
1056 case DISCOVERY_FINDING:
1057 case DISCOVERY_RESOLVING:
1065 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1067 int old_state = hdev->discovery.state;
1069 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1071 if (old_state == state)
1074 hdev->discovery.state = state;
1077 case DISCOVERY_STOPPED:
1078 hci_update_background_scan(hdev);
1080 if (old_state != DISCOVERY_STARTING)
1081 mgmt_discovering(hdev, 0);
1083 case DISCOVERY_STARTING:
1085 case DISCOVERY_FINDING:
1086 mgmt_discovering(hdev, 1);
1088 case DISCOVERY_RESOLVING:
1090 case DISCOVERY_STOPPING:
1095 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1097 struct discovery_state *cache = &hdev->discovery;
1098 struct inquiry_entry *p, *n;
1100 list_for_each_entry_safe(p, n, &cache->all, all) {
1105 INIT_LIST_HEAD(&cache->unknown);
1106 INIT_LIST_HEAD(&cache->resolve);
1109 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1112 struct discovery_state *cache = &hdev->discovery;
1113 struct inquiry_entry *e;
1115 BT_DBG("cache %p, %pMR", cache, bdaddr);
1117 list_for_each_entry(e, &cache->all, all) {
1118 if (!bacmp(&e->data.bdaddr, bdaddr))
1125 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1128 struct discovery_state *cache = &hdev->discovery;
1129 struct inquiry_entry *e;
1131 BT_DBG("cache %p, %pMR", cache, bdaddr);
1133 list_for_each_entry(e, &cache->unknown, list) {
1134 if (!bacmp(&e->data.bdaddr, bdaddr))
1141 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1145 struct discovery_state *cache = &hdev->discovery;
1146 struct inquiry_entry *e;
1148 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1150 list_for_each_entry(e, &cache->resolve, list) {
1151 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1153 if (!bacmp(&e->data.bdaddr, bdaddr))
1160 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1161 struct inquiry_entry *ie)
1163 struct discovery_state *cache = &hdev->discovery;
1164 struct list_head *pos = &cache->resolve;
1165 struct inquiry_entry *p;
1167 list_del(&ie->list);
1169 list_for_each_entry(p, &cache->resolve, list) {
1170 if (p->name_state != NAME_PENDING &&
1171 abs(p->data.rssi) >= abs(ie->data.rssi))
1176 list_add(&ie->list, pos);
1179 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1182 struct discovery_state *cache = &hdev->discovery;
1183 struct inquiry_entry *ie;
1186 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1188 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1190 if (!data->ssp_mode)
1191 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1193 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1195 if (!ie->data.ssp_mode)
1196 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1198 if (ie->name_state == NAME_NEEDED &&
1199 data->rssi != ie->data.rssi) {
1200 ie->data.rssi = data->rssi;
1201 hci_inquiry_cache_update_resolve(hdev, ie);
1207 /* Entry not in the cache. Add new one. */
1208 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1210 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1214 list_add(&ie->all, &cache->all);
1217 ie->name_state = NAME_KNOWN;
1219 ie->name_state = NAME_NOT_KNOWN;
1220 list_add(&ie->list, &cache->unknown);
1224 if (name_known && ie->name_state != NAME_KNOWN &&
1225 ie->name_state != NAME_PENDING) {
1226 ie->name_state = NAME_KNOWN;
1227 list_del(&ie->list);
1230 memcpy(&ie->data, data, sizeof(*data));
1231 ie->timestamp = jiffies;
1232 cache->timestamp = jiffies;
1234 if (ie->name_state == NAME_NOT_KNOWN)
1235 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1241 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1243 struct discovery_state *cache = &hdev->discovery;
1244 struct inquiry_info *info = (struct inquiry_info *) buf;
1245 struct inquiry_entry *e;
1248 list_for_each_entry(e, &cache->all, all) {
1249 struct inquiry_data *data = &e->data;
1254 bacpy(&info->bdaddr, &data->bdaddr);
1255 info->pscan_rep_mode = data->pscan_rep_mode;
1256 info->pscan_period_mode = data->pscan_period_mode;
1257 info->pscan_mode = data->pscan_mode;
1258 memcpy(info->dev_class, data->dev_class, 3);
1259 info->clock_offset = data->clock_offset;
1265 BT_DBG("cache %p, copied %d", cache, copied);
1269 static void hci_inq_req(struct hci_request *req, unsigned long opt)
1271 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1272 struct hci_dev *hdev = req->hdev;
1273 struct hci_cp_inquiry cp;
1275 BT_DBG("%s", hdev->name);
1277 if (test_bit(HCI_INQUIRY, &hdev->flags))
1281 memcpy(&cp.lap, &ir->lap, 3);
1282 cp.length = ir->length;
1283 cp.num_rsp = ir->num_rsp;
1284 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1287 int hci_inquiry(void __user *arg)
1289 __u8 __user *ptr = arg;
1290 struct hci_inquiry_req ir;
1291 struct hci_dev *hdev;
1292 int err = 0, do_inquiry = 0, max_rsp;
1296 if (copy_from_user(&ir, ptr, sizeof(ir)))
1299 hdev = hci_dev_get(ir.dev_id);
1303 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1308 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1313 if (hdev->dev_type != HCI_BREDR) {
1318 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1324 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1325 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1326 hci_inquiry_cache_flush(hdev);
1329 hci_dev_unlock(hdev);
1331 timeo = ir.length * msecs_to_jiffies(2000);
1334 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1339 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1340 * cleared). If it is interrupted by a signal, return -EINTR.
1342 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1343 TASK_INTERRUPTIBLE))
1347 /* for unlimited number of responses we will use buffer with
1350 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1352 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1353 * copy it to the user space.
1355 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1362 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1363 hci_dev_unlock(hdev);
1365 BT_DBG("num_rsp %d", ir.num_rsp);
1367 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1369 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1382 static int hci_dev_do_open(struct hci_dev *hdev)
1386 BT_DBG("%s %p", hdev->name, hdev);
1390 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1395 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1396 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1397 /* Check for rfkill but allow the HCI setup stage to
1398 * proceed (which in itself doesn't cause any RF activity).
1400 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1405 /* Check for valid public address or a configured static
1406 * random adddress, but let the HCI setup proceed to
1407 * be able to determine if there is a public address
1410 * In case of user channel usage, it is not important
1411 * if a public address or static random address is
1414 * This check is only valid for BR/EDR controllers
1415 * since AMP controllers do not have an address.
1417 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1418 hdev->dev_type == HCI_BREDR &&
1419 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1420 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1421 ret = -EADDRNOTAVAIL;
1426 if (test_bit(HCI_UP, &hdev->flags)) {
1431 if (hdev->open(hdev)) {
1436 atomic_set(&hdev->cmd_cnt, 1);
1437 set_bit(HCI_INIT, &hdev->flags);
1439 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1441 ret = hdev->setup(hdev);
1443 /* The transport driver can set these quirks before
1444 * creating the HCI device or in its setup callback.
1446 * In case any of them is set, the controller has to
1447 * start up as unconfigured.
1449 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1450 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1451 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1453 /* For an unconfigured controller it is required to
1454 * read at least the version information provided by
1455 * the Read Local Version Information command.
1457 * If the set_bdaddr driver callback is provided, then
1458 * also the original Bluetooth public device address
1459 * will be read using the Read BD Address command.
1461 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1462 ret = __hci_unconf_init(hdev);
1465 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1466 /* If public address change is configured, ensure that
1467 * the address gets programmed. If the driver does not
1468 * support changing the public address, fail the power
1471 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1473 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1475 ret = -EADDRNOTAVAIL;
1479 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1480 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
1481 ret = __hci_init(hdev);
1484 clear_bit(HCI_INIT, &hdev->flags);
1488 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1489 set_bit(HCI_UP, &hdev->flags);
1490 hci_notify(hdev, HCI_DEV_UP);
1491 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1492 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1493 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1494 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1495 hdev->dev_type == HCI_BREDR) {
1497 mgmt_powered(hdev, 1);
1498 hci_dev_unlock(hdev);
1501 /* Init failed, cleanup */
1502 flush_work(&hdev->tx_work);
1503 flush_work(&hdev->cmd_work);
1504 flush_work(&hdev->rx_work);
1506 skb_queue_purge(&hdev->cmd_q);
1507 skb_queue_purge(&hdev->rx_q);
1512 if (hdev->sent_cmd) {
1513 kfree_skb(hdev->sent_cmd);
1514 hdev->sent_cmd = NULL;
1518 hdev->flags &= BIT(HCI_RAW);
1522 hci_req_unlock(hdev);
1526 /* ---- HCI ioctl helpers ---- */
1528 int hci_dev_open(__u16 dev)
1530 struct hci_dev *hdev;
1533 hdev = hci_dev_get(dev);
1537 /* Devices that are marked as unconfigured can only be powered
1538 * up as user channel. Trying to bring them up as normal devices
1539 * will result into a failure. Only user channel operation is
1542 * When this function is called for a user channel, the flag
1543 * HCI_USER_CHANNEL will be set first before attempting to
1546 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1547 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1552 /* We need to ensure that no other power on/off work is pending
1553 * before proceeding to call hci_dev_do_open. This is
1554 * particularly important if the setup procedure has not yet
1557 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1558 cancel_delayed_work(&hdev->power_off);
1560 /* After this call it is guaranteed that the setup procedure
1561 * has finished. This means that error conditions like RFKILL
1562 * or no valid public or static random address apply.
1564 flush_workqueue(hdev->req_workqueue);
1566 /* For controllers not using the management interface and that
1567 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1568 * so that pairing works for them. Once the management interface
1569 * is in use this bit will be cleared again and userspace has
1570 * to explicitly enable it.
1572 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1573 !hci_dev_test_flag(hdev, HCI_MGMT))
1574 hci_dev_set_flag(hdev, HCI_BONDABLE);
1576 err = hci_dev_do_open(hdev);
1583 /* This function requires the caller holds hdev->lock */
1584 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1586 struct hci_conn_params *p;
1588 list_for_each_entry(p, &hdev->le_conn_params, list) {
1590 hci_conn_drop(p->conn);
1591 hci_conn_put(p->conn);
1594 list_del_init(&p->action);
1597 BT_DBG("All LE pending actions cleared");
1600 static int hci_dev_do_close(struct hci_dev *hdev)
1602 BT_DBG("%s %p", hdev->name, hdev);
1604 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1605 /* Execute vendor specific shutdown routine */
1607 hdev->shutdown(hdev);
1610 cancel_delayed_work(&hdev->power_off);
1612 hci_req_cancel(hdev, ENODEV);
1615 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1616 cancel_delayed_work_sync(&hdev->cmd_timer);
1617 hci_req_unlock(hdev);
1621 /* Flush RX and TX works */
1622 flush_work(&hdev->tx_work);
1623 flush_work(&hdev->rx_work);
1625 if (hdev->discov_timeout > 0) {
1626 cancel_delayed_work(&hdev->discov_off);
1627 hdev->discov_timeout = 0;
1628 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1629 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1632 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1633 cancel_delayed_work(&hdev->service_cache);
1635 cancel_delayed_work_sync(&hdev->le_scan_disable);
1636 cancel_delayed_work_sync(&hdev->le_scan_restart);
1638 if (hci_dev_test_flag(hdev, HCI_MGMT))
1639 cancel_delayed_work_sync(&hdev->rpa_expired);
1641 /* Avoid potential lockdep warnings from the *_flush() calls by
1642 * ensuring the workqueue is empty up front.
1644 drain_workqueue(hdev->workqueue);
1648 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1650 if (!hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
1651 if (hdev->dev_type == HCI_BREDR)
1652 mgmt_powered(hdev, 0);
1655 hci_inquiry_cache_flush(hdev);
1656 hci_pend_le_actions_clear(hdev);
1657 hci_conn_hash_flush(hdev);
1658 hci_dev_unlock(hdev);
1660 smp_unregister(hdev);
1662 hci_notify(hdev, HCI_DEV_DOWN);
1668 skb_queue_purge(&hdev->cmd_q);
1669 atomic_set(&hdev->cmd_cnt, 1);
1670 if (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1671 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1672 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1673 set_bit(HCI_INIT, &hdev->flags);
1674 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1675 clear_bit(HCI_INIT, &hdev->flags);
1678 /* flush cmd work */
1679 flush_work(&hdev->cmd_work);
1682 skb_queue_purge(&hdev->rx_q);
1683 skb_queue_purge(&hdev->cmd_q);
1684 skb_queue_purge(&hdev->raw_q);
1686 /* Drop last sent command */
1687 if (hdev->sent_cmd) {
1688 cancel_delayed_work_sync(&hdev->cmd_timer);
1689 kfree_skb(hdev->sent_cmd);
1690 hdev->sent_cmd = NULL;
1693 kfree_skb(hdev->recv_evt);
1694 hdev->recv_evt = NULL;
1696 /* After this point our queues are empty
1697 * and no tasks are scheduled. */
1701 hdev->flags &= BIT(HCI_RAW);
1702 hci_dev_clear_volatile_flags(hdev);
1704 /* Controller radio is available but is currently powered down */
1705 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1707 memset(hdev->eir, 0, sizeof(hdev->eir));
1708 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1709 bacpy(&hdev->random_addr, BDADDR_ANY);
1711 hci_req_unlock(hdev);
1717 int hci_dev_close(__u16 dev)
1719 struct hci_dev *hdev;
1722 hdev = hci_dev_get(dev);
1726 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1731 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1732 cancel_delayed_work(&hdev->power_off);
1734 err = hci_dev_do_close(hdev);
1741 static int hci_dev_do_reset(struct hci_dev *hdev)
1745 BT_DBG("%s %p", hdev->name, hdev);
1750 skb_queue_purge(&hdev->rx_q);
1751 skb_queue_purge(&hdev->cmd_q);
1753 /* Avoid potential lockdep warnings from the *_flush() calls by
1754 * ensuring the workqueue is empty up front.
1756 drain_workqueue(hdev->workqueue);
1759 hci_inquiry_cache_flush(hdev);
1760 hci_conn_hash_flush(hdev);
1761 hci_dev_unlock(hdev);
1766 atomic_set(&hdev->cmd_cnt, 1);
1767 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1769 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1771 hci_req_unlock(hdev);
1775 int hci_dev_reset(__u16 dev)
1777 struct hci_dev *hdev;
1780 hdev = hci_dev_get(dev);
1784 if (!test_bit(HCI_UP, &hdev->flags)) {
1789 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1794 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1799 err = hci_dev_do_reset(hdev);
1806 int hci_dev_reset_stat(__u16 dev)
1808 struct hci_dev *hdev;
1811 hdev = hci_dev_get(dev);
1815 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1820 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1825 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1832 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1834 bool conn_changed, discov_changed;
1836 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1838 if ((scan & SCAN_PAGE))
1839 conn_changed = !hci_dev_test_and_set_flag(hdev,
1842 conn_changed = hci_dev_test_and_clear_flag(hdev,
1845 if ((scan & SCAN_INQUIRY)) {
1846 discov_changed = !hci_dev_test_and_set_flag(hdev,
1849 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1850 discov_changed = hci_dev_test_and_clear_flag(hdev,
1854 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1857 if (conn_changed || discov_changed) {
1858 /* In case this was disabled through mgmt */
1859 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1861 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1862 mgmt_update_adv_data(hdev);
1864 mgmt_new_settings(hdev);
1868 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1870 struct hci_dev *hdev;
1871 struct hci_dev_req dr;
1874 if (copy_from_user(&dr, arg, sizeof(dr)))
1877 hdev = hci_dev_get(dr.dev_id);
1881 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1886 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1891 if (hdev->dev_type != HCI_BREDR) {
1896 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1903 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1908 if (!lmp_encrypt_capable(hdev)) {
1913 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1914 /* Auth must be enabled first */
1915 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1921 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1926 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1929 /* Ensure that the connectable and discoverable states
1930 * get correctly modified as this was a non-mgmt change.
1933 hci_update_scan_state(hdev, dr.dev_opt);
1937 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1941 case HCISETLINKMODE:
1942 hdev->link_mode = ((__u16) dr.dev_opt) &
1943 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1947 hdev->pkt_type = (__u16) dr.dev_opt;
1951 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1952 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1956 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1957 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1970 int hci_get_dev_list(void __user *arg)
1972 struct hci_dev *hdev;
1973 struct hci_dev_list_req *dl;
1974 struct hci_dev_req *dr;
1975 int n = 0, size, err;
1978 if (get_user(dev_num, (__u16 __user *) arg))
1981 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1984 size = sizeof(*dl) + dev_num * sizeof(*dr);
1986 dl = kzalloc(size, GFP_KERNEL);
1992 read_lock(&hci_dev_list_lock);
1993 list_for_each_entry(hdev, &hci_dev_list, list) {
1994 unsigned long flags = hdev->flags;
1996 /* When the auto-off is configured it means the transport
1997 * is running, but in that case still indicate that the
1998 * device is actually down.
2000 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2001 flags &= ~BIT(HCI_UP);
2003 (dr + n)->dev_id = hdev->id;
2004 (dr + n)->dev_opt = flags;
2009 read_unlock(&hci_dev_list_lock);
2012 size = sizeof(*dl) + n * sizeof(*dr);
2014 err = copy_to_user(arg, dl, size);
2017 return err ? -EFAULT : 0;
2020 int hci_get_dev_info(void __user *arg)
2022 struct hci_dev *hdev;
2023 struct hci_dev_info di;
2024 unsigned long flags;
2027 if (copy_from_user(&di, arg, sizeof(di)))
2030 hdev = hci_dev_get(di.dev_id);
2034 /* When the auto-off is configured it means the transport
2035 * is running, but in that case still indicate that the
2036 * device is actually down.
2038 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2039 flags = hdev->flags & ~BIT(HCI_UP);
2041 flags = hdev->flags;
2043 strcpy(di.name, hdev->name);
2044 di.bdaddr = hdev->bdaddr;
2045 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2047 di.pkt_type = hdev->pkt_type;
2048 if (lmp_bredr_capable(hdev)) {
2049 di.acl_mtu = hdev->acl_mtu;
2050 di.acl_pkts = hdev->acl_pkts;
2051 di.sco_mtu = hdev->sco_mtu;
2052 di.sco_pkts = hdev->sco_pkts;
2054 di.acl_mtu = hdev->le_mtu;
2055 di.acl_pkts = hdev->le_pkts;
2059 di.link_policy = hdev->link_policy;
2060 di.link_mode = hdev->link_mode;
2062 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2063 memcpy(&di.features, &hdev->features, sizeof(di.features));
2065 if (copy_to_user(arg, &di, sizeof(di)))
2073 /* ---- Interface to HCI drivers ---- */
2075 static int hci_rfkill_set_block(void *data, bool blocked)
2077 struct hci_dev *hdev = data;
2079 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2081 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2085 hci_dev_set_flag(hdev, HCI_RFKILLED);
2086 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2087 !hci_dev_test_flag(hdev, HCI_CONFIG))
2088 hci_dev_do_close(hdev);
2090 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2096 static const struct rfkill_ops hci_rfkill_ops = {
2097 .set_block = hci_rfkill_set_block,
2100 static void hci_power_on(struct work_struct *work)
2102 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2105 BT_DBG("%s", hdev->name);
2107 err = hci_dev_do_open(hdev);
2110 mgmt_set_powered_failed(hdev, err);
2111 hci_dev_unlock(hdev);
2115 /* During the HCI setup phase, a few error conditions are
2116 * ignored and they need to be checked now. If they are still
2117 * valid, it is important to turn the device back off.
2119 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2120 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2121 (hdev->dev_type == HCI_BREDR &&
2122 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2123 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2124 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2125 hci_dev_do_close(hdev);
2126 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2127 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2128 HCI_AUTO_OFF_TIMEOUT);
2131 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2132 /* For unconfigured devices, set the HCI_RAW flag
2133 * so that userspace can easily identify them.
2135 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2136 set_bit(HCI_RAW, &hdev->flags);
2138 /* For fully configured devices, this will send
2139 * the Index Added event. For unconfigured devices,
2140 * it will send Unconfigued Index Added event.
2142 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2143 * and no event will be send.
2145 mgmt_index_added(hdev);
2146 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2147 /* When the controller is now configured, then it
2148 * is important to clear the HCI_RAW flag.
2150 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2151 clear_bit(HCI_RAW, &hdev->flags);
2153 /* Powering on the controller with HCI_CONFIG set only
2154 * happens with the transition from unconfigured to
2155 * configured. This will send the Index Added event.
2157 mgmt_index_added(hdev);
2161 static void hci_power_off(struct work_struct *work)
2163 struct hci_dev *hdev = container_of(work, struct hci_dev,
2166 BT_DBG("%s", hdev->name);
2168 hci_dev_do_close(hdev);
2171 static void hci_error_reset(struct work_struct *work)
2173 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2175 BT_DBG("%s", hdev->name);
2178 hdev->hw_error(hdev, hdev->hw_error_code);
2180 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2181 hdev->hw_error_code);
2183 if (hci_dev_do_close(hdev))
2186 hci_dev_do_open(hdev);
2189 static void hci_discov_off(struct work_struct *work)
2191 struct hci_dev *hdev;
2193 hdev = container_of(work, struct hci_dev, discov_off.work);
2195 BT_DBG("%s", hdev->name);
2197 mgmt_discoverable_timeout(hdev);
2200 void hci_uuids_clear(struct hci_dev *hdev)
2202 struct bt_uuid *uuid, *tmp;
2204 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2205 list_del(&uuid->list);
2210 void hci_link_keys_clear(struct hci_dev *hdev)
2212 struct link_key *key;
2214 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2215 list_del_rcu(&key->list);
2216 kfree_rcu(key, rcu);
2220 void hci_smp_ltks_clear(struct hci_dev *hdev)
2224 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2225 list_del_rcu(&k->list);
2230 void hci_smp_irks_clear(struct hci_dev *hdev)
2234 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2235 list_del_rcu(&k->list);
2240 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2245 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2246 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2256 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2257 u8 key_type, u8 old_key_type)
2260 if (key_type < 0x03)
2263 /* Debug keys are insecure so don't store them persistently */
2264 if (key_type == HCI_LK_DEBUG_COMBINATION)
2267 /* Changed combination key and there's no previous one */
2268 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2271 /* Security mode 3 case */
2275 /* BR/EDR key derived using SC from an LE link */
2276 if (conn->type == LE_LINK)
2279 /* Neither local nor remote side had no-bonding as requirement */
2280 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2283 /* Local side had dedicated bonding as requirement */
2284 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2287 /* Remote side had dedicated bonding as requirement */
2288 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2291 /* If none of the above criteria match, then don't store the key
2296 static u8 ltk_role(u8 type)
2298 if (type == SMP_LTK)
2299 return HCI_ROLE_MASTER;
2301 return HCI_ROLE_SLAVE;
2304 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2305 u8 addr_type, u8 role)
2310 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2311 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2314 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2324 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2326 struct smp_irk *irk;
2329 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2330 if (!bacmp(&irk->rpa, rpa)) {
2336 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2337 if (smp_irk_matches(hdev, irk->val, rpa)) {
2338 bacpy(&irk->rpa, rpa);
2348 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2351 struct smp_irk *irk;
2353 /* Identity Address must be public or static random */
2354 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2358 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2359 if (addr_type == irk->addr_type &&
2360 bacmp(bdaddr, &irk->bdaddr) == 0) {
2370 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2371 bdaddr_t *bdaddr, u8 *val, u8 type,
2372 u8 pin_len, bool *persistent)
2374 struct link_key *key, *old_key;
2377 old_key = hci_find_link_key(hdev, bdaddr);
2379 old_key_type = old_key->type;
2382 old_key_type = conn ? conn->key_type : 0xff;
2383 key = kzalloc(sizeof(*key), GFP_KERNEL);
2386 list_add_rcu(&key->list, &hdev->link_keys);
2389 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2391 /* Some buggy controller combinations generate a changed
2392 * combination key for legacy pairing even when there's no
2394 if (type == HCI_LK_CHANGED_COMBINATION &&
2395 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2396 type = HCI_LK_COMBINATION;
2398 conn->key_type = type;
2401 bacpy(&key->bdaddr, bdaddr);
2402 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2403 key->pin_len = pin_len;
2405 if (type == HCI_LK_CHANGED_COMBINATION)
2406 key->type = old_key_type;
2411 *persistent = hci_persistent_key(hdev, conn, type,
2417 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2418 u8 addr_type, u8 type, u8 authenticated,
2419 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2421 struct smp_ltk *key, *old_key;
2422 u8 role = ltk_role(type);
2424 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2428 key = kzalloc(sizeof(*key), GFP_KERNEL);
2431 list_add_rcu(&key->list, &hdev->long_term_keys);
2434 bacpy(&key->bdaddr, bdaddr);
2435 key->bdaddr_type = addr_type;
2436 memcpy(key->val, tk, sizeof(key->val));
2437 key->authenticated = authenticated;
2440 key->enc_size = enc_size;
2446 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2447 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2449 struct smp_irk *irk;
2451 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2453 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2457 bacpy(&irk->bdaddr, bdaddr);
2458 irk->addr_type = addr_type;
2460 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2463 memcpy(irk->val, val, 16);
2464 bacpy(&irk->rpa, rpa);
2469 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2471 struct link_key *key;
2473 key = hci_find_link_key(hdev, bdaddr);
2477 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2479 list_del_rcu(&key->list);
2480 kfree_rcu(key, rcu);
2485 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2490 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2491 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2494 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2496 list_del_rcu(&k->list);
2501 return removed ? 0 : -ENOENT;
2504 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2508 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2509 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2512 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2514 list_del_rcu(&k->list);
2519 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2522 struct smp_irk *irk;
2525 if (type == BDADDR_BREDR) {
2526 if (hci_find_link_key(hdev, bdaddr))
2531 /* Convert to HCI addr type which struct smp_ltk uses */
2532 if (type == BDADDR_LE_PUBLIC)
2533 addr_type = ADDR_LE_DEV_PUBLIC;
2535 addr_type = ADDR_LE_DEV_RANDOM;
2537 irk = hci_get_irk(hdev, bdaddr, addr_type);
2539 bdaddr = &irk->bdaddr;
2540 addr_type = irk->addr_type;
2544 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2545 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2555 /* HCI command timer function */
2556 static void hci_cmd_timeout(struct work_struct *work)
2558 struct hci_dev *hdev = container_of(work, struct hci_dev,
2561 if (hdev->sent_cmd) {
2562 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2563 u16 opcode = __le16_to_cpu(sent->opcode);
2565 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2567 BT_ERR("%s command tx timeout", hdev->name);
2570 atomic_set(&hdev->cmd_cnt, 1);
2571 queue_work(hdev->workqueue, &hdev->cmd_work);
2574 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2575 bdaddr_t *bdaddr, u8 bdaddr_type)
2577 struct oob_data *data;
2579 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2580 if (bacmp(bdaddr, &data->bdaddr) != 0)
2582 if (data->bdaddr_type != bdaddr_type)
2590 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2593 struct oob_data *data;
2595 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2599 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2601 list_del(&data->list);
2607 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2609 struct oob_data *data, *n;
2611 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2612 list_del(&data->list);
2617 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2618 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2619 u8 *hash256, u8 *rand256)
2621 struct oob_data *data;
2623 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2625 data = kmalloc(sizeof(*data), GFP_KERNEL);
2629 bacpy(&data->bdaddr, bdaddr);
2630 data->bdaddr_type = bdaddr_type;
2631 list_add(&data->list, &hdev->remote_oob_data);
2634 if (hash192 && rand192) {
2635 memcpy(data->hash192, hash192, sizeof(data->hash192));
2636 memcpy(data->rand192, rand192, sizeof(data->rand192));
2637 if (hash256 && rand256)
2638 data->present = 0x03;
2640 memset(data->hash192, 0, sizeof(data->hash192));
2641 memset(data->rand192, 0, sizeof(data->rand192));
2642 if (hash256 && rand256)
2643 data->present = 0x02;
2645 data->present = 0x00;
2648 if (hash256 && rand256) {
2649 memcpy(data->hash256, hash256, sizeof(data->hash256));
2650 memcpy(data->rand256, rand256, sizeof(data->rand256));
2652 memset(data->hash256, 0, sizeof(data->hash256));
2653 memset(data->rand256, 0, sizeof(data->rand256));
2654 if (hash192 && rand192)
2655 data->present = 0x01;
2658 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2663 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2664 bdaddr_t *bdaddr, u8 type)
2666 struct bdaddr_list *b;
2668 list_for_each_entry(b, bdaddr_list, list) {
2669 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2676 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2678 struct list_head *p, *n;
2680 list_for_each_safe(p, n, bdaddr_list) {
2681 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
2688 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2690 struct bdaddr_list *entry;
2692 if (!bacmp(bdaddr, BDADDR_ANY))
2695 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2698 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2702 bacpy(&entry->bdaddr, bdaddr);
2703 entry->bdaddr_type = type;
2705 list_add(&entry->list, list);
2710 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2712 struct bdaddr_list *entry;
2714 if (!bacmp(bdaddr, BDADDR_ANY)) {
2715 hci_bdaddr_list_clear(list);
2719 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2723 list_del(&entry->list);
2729 /* This function requires the caller holds hdev->lock */
2730 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2731 bdaddr_t *addr, u8 addr_type)
2733 struct hci_conn_params *params;
2735 /* The conn params list only contains identity addresses */
2736 if (!hci_is_identity_address(addr, addr_type))
2739 list_for_each_entry(params, &hdev->le_conn_params, list) {
2740 if (bacmp(¶ms->addr, addr) == 0 &&
2741 params->addr_type == addr_type) {
2749 /* This function requires the caller holds hdev->lock */
2750 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2751 bdaddr_t *addr, u8 addr_type)
2753 struct hci_conn_params *param;
2755 /* The list only contains identity addresses */
2756 if (!hci_is_identity_address(addr, addr_type))
2759 list_for_each_entry(param, list, action) {
2760 if (bacmp(¶m->addr, addr) == 0 &&
2761 param->addr_type == addr_type)
2768 /* This function requires the caller holds hdev->lock */
2769 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2770 bdaddr_t *addr, u8 addr_type)
2772 struct hci_conn_params *params;
2774 if (!hci_is_identity_address(addr, addr_type))
2777 params = hci_conn_params_lookup(hdev, addr, addr_type);
2781 params = kzalloc(sizeof(*params), GFP_KERNEL);
2783 BT_ERR("Out of memory");
2787 bacpy(¶ms->addr, addr);
2788 params->addr_type = addr_type;
2790 list_add(¶ms->list, &hdev->le_conn_params);
2791 INIT_LIST_HEAD(¶ms->action);
2793 params->conn_min_interval = hdev->le_conn_min_interval;
2794 params->conn_max_interval = hdev->le_conn_max_interval;
2795 params->conn_latency = hdev->le_conn_latency;
2796 params->supervision_timeout = hdev->le_supv_timeout;
2797 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2799 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2804 static void hci_conn_params_free(struct hci_conn_params *params)
2807 hci_conn_drop(params->conn);
2808 hci_conn_put(params->conn);
2811 list_del(¶ms->action);
2812 list_del(¶ms->list);
2816 /* This function requires the caller holds hdev->lock */
2817 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2819 struct hci_conn_params *params;
2821 params = hci_conn_params_lookup(hdev, addr, addr_type);
2825 hci_conn_params_free(params);
2827 hci_update_background_scan(hdev);
2829 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2832 /* This function requires the caller holds hdev->lock */
2833 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2835 struct hci_conn_params *params, *tmp;
2837 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2838 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2840 list_del(¶ms->list);
2844 BT_DBG("All LE disabled connection parameters were removed");
2847 /* This function requires the caller holds hdev->lock */
2848 void hci_conn_params_clear_all(struct hci_dev *hdev)
2850 struct hci_conn_params *params, *tmp;
2852 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2853 hci_conn_params_free(params);
2855 hci_update_background_scan(hdev);
2857 BT_DBG("All LE connection parameters were removed");
2860 static void inquiry_complete(struct hci_dev *hdev, u8 status, u16 opcode)
2863 BT_ERR("Failed to start inquiry: status %d", status);
2866 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2867 hci_dev_unlock(hdev);
2872 static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
2875 /* General inquiry access code (GIAC) */
2876 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2877 struct hci_request req;
2878 struct hci_cp_inquiry cp;
2882 BT_ERR("Failed to disable LE scanning: status %d", status);
2886 hdev->discovery.scan_start = 0;
2888 switch (hdev->discovery.type) {
2889 case DISCOV_TYPE_LE:
2891 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2892 hci_dev_unlock(hdev);
2895 case DISCOV_TYPE_INTERLEAVED:
2896 hci_req_init(&req, hdev);
2898 memset(&cp, 0, sizeof(cp));
2899 memcpy(&cp.lap, lap, sizeof(cp.lap));
2900 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2901 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
2905 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
2907 /* If we were running LE only scan, change discovery
2908 * state. If we were running both LE and BR/EDR inquiry
2909 * simultaneously, and BR/EDR inquiry is already
2910 * finished, stop discovery, otherwise BR/EDR inquiry
2911 * will stop discovery when finished.
2913 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2914 hci_discovery_set_state(hdev,
2917 hci_inquiry_cache_flush(hdev);
2919 err = hci_req_run(&req, inquiry_complete);
2921 BT_ERR("Inquiry request failed: err %d", err);
2922 hci_discovery_set_state(hdev,
2927 hci_dev_unlock(hdev);
2932 static void le_scan_disable_work(struct work_struct *work)
2934 struct hci_dev *hdev = container_of(work, struct hci_dev,
2935 le_scan_disable.work);
2936 struct hci_request req;
2939 BT_DBG("%s", hdev->name);
2941 cancel_delayed_work_sync(&hdev->le_scan_restart);
2943 hci_req_init(&req, hdev);
2945 hci_req_add_le_scan_disable(&req);
2947 err = hci_req_run(&req, le_scan_disable_work_complete);
2949 BT_ERR("Disable LE scanning request failed: err %d", err);
2952 static void le_scan_restart_work_complete(struct hci_dev *hdev, u8 status,
2955 unsigned long timeout, duration, scan_start, now;
2957 BT_DBG("%s", hdev->name);
2960 BT_ERR("Failed to restart LE scan: status %d", status);
2964 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
2965 !hdev->discovery.scan_start)
2968 /* When the scan was started, hdev->le_scan_disable has been queued
2969 * after duration from scan_start. During scan restart this job
2970 * has been canceled, and we need to queue it again after proper
2971 * timeout, to make sure that scan does not run indefinitely.
2973 duration = hdev->discovery.scan_duration;
2974 scan_start = hdev->discovery.scan_start;
2976 if (now - scan_start <= duration) {
2979 if (now >= scan_start)
2980 elapsed = now - scan_start;
2982 elapsed = ULONG_MAX - scan_start + now;
2984 timeout = duration - elapsed;
2988 queue_delayed_work(hdev->workqueue,
2989 &hdev->le_scan_disable, timeout);
2992 static void le_scan_restart_work(struct work_struct *work)
2994 struct hci_dev *hdev = container_of(work, struct hci_dev,
2995 le_scan_restart.work);
2996 struct hci_request req;
2997 struct hci_cp_le_set_scan_enable cp;
3000 BT_DBG("%s", hdev->name);
3002 /* If controller is not scanning we are done. */
3003 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
3006 hci_req_init(&req, hdev);
3008 hci_req_add_le_scan_disable(&req);
3010 memset(&cp, 0, sizeof(cp));
3011 cp.enable = LE_SCAN_ENABLE;
3012 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
3013 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
3015 err = hci_req_run(&req, le_scan_restart_work_complete);
3017 BT_ERR("Restart LE scan request failed: err %d", err);
3020 /* Copy the Identity Address of the controller.
3022 * If the controller has a public BD_ADDR, then by default use that one.
3023 * If this is a LE only controller without a public address, default to
3024 * the static random address.
3026 * For debugging purposes it is possible to force controllers with a
3027 * public address to use the static random address instead.
3029 * In case BR/EDR has been disabled on a dual-mode controller and
3030 * userspace has configured a static address, then that address
3031 * becomes the identity address instead of the public BR/EDR address.
3033 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3036 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3037 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3038 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3039 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3040 bacpy(bdaddr, &hdev->static_addr);
3041 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3043 bacpy(bdaddr, &hdev->bdaddr);
3044 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3048 /* Alloc HCI device */
3049 struct hci_dev *hci_alloc_dev(void)
3051 struct hci_dev *hdev;
3053 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3057 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3058 hdev->esco_type = (ESCO_HV1);
3059 hdev->link_mode = (HCI_LM_ACCEPT);
3060 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3061 hdev->io_capability = 0x03; /* No Input No Output */
3062 hdev->manufacturer = 0xffff; /* Default to internal use */
3063 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3064 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3066 hdev->sniff_max_interval = 800;
3067 hdev->sniff_min_interval = 80;
3069 hdev->le_adv_channel_map = 0x07;
3070 hdev->le_adv_min_interval = 0x0800;
3071 hdev->le_adv_max_interval = 0x0800;
3072 hdev->le_scan_interval = 0x0060;
3073 hdev->le_scan_window = 0x0030;
3074 hdev->le_conn_min_interval = 0x0028;
3075 hdev->le_conn_max_interval = 0x0038;
3076 hdev->le_conn_latency = 0x0000;
3077 hdev->le_supv_timeout = 0x002a;
3078 hdev->le_def_tx_len = 0x001b;
3079 hdev->le_def_tx_time = 0x0148;
3080 hdev->le_max_tx_len = 0x001b;
3081 hdev->le_max_tx_time = 0x0148;
3082 hdev->le_max_rx_len = 0x001b;
3083 hdev->le_max_rx_time = 0x0148;
3085 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3086 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3087 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3088 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3090 mutex_init(&hdev->lock);
3091 mutex_init(&hdev->req_lock);
3093 INIT_LIST_HEAD(&hdev->mgmt_pending);
3094 INIT_LIST_HEAD(&hdev->blacklist);
3095 INIT_LIST_HEAD(&hdev->whitelist);
3096 INIT_LIST_HEAD(&hdev->uuids);
3097 INIT_LIST_HEAD(&hdev->link_keys);
3098 INIT_LIST_HEAD(&hdev->long_term_keys);
3099 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3100 INIT_LIST_HEAD(&hdev->remote_oob_data);
3101 INIT_LIST_HEAD(&hdev->le_white_list);
3102 INIT_LIST_HEAD(&hdev->le_conn_params);
3103 INIT_LIST_HEAD(&hdev->pend_le_conns);
3104 INIT_LIST_HEAD(&hdev->pend_le_reports);
3105 INIT_LIST_HEAD(&hdev->conn_hash.list);
3107 INIT_WORK(&hdev->rx_work, hci_rx_work);
3108 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3109 INIT_WORK(&hdev->tx_work, hci_tx_work);
3110 INIT_WORK(&hdev->power_on, hci_power_on);
3111 INIT_WORK(&hdev->error_reset, hci_error_reset);
3113 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3114 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
3115 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3116 INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
3118 skb_queue_head_init(&hdev->rx_q);
3119 skb_queue_head_init(&hdev->cmd_q);
3120 skb_queue_head_init(&hdev->raw_q);
3122 init_waitqueue_head(&hdev->req_wait_q);
3124 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3126 hci_init_sysfs(hdev);
3127 discovery_init(hdev);
3131 EXPORT_SYMBOL(hci_alloc_dev);
3133 /* Free HCI device */
3134 void hci_free_dev(struct hci_dev *hdev)
3136 /* will free via device release */
3137 put_device(&hdev->dev);
3139 EXPORT_SYMBOL(hci_free_dev);
3141 /* Register HCI device */
3142 int hci_register_dev(struct hci_dev *hdev)
3146 if (!hdev->open || !hdev->close || !hdev->send)
3149 /* Do not allow HCI_AMP devices to register at index 0,
3150 * so the index can be used as the AMP controller ID.
3152 switch (hdev->dev_type) {
3154 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3157 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3166 sprintf(hdev->name, "hci%d", id);
3169 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3171 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3172 WQ_MEM_RECLAIM, 1, hdev->name);
3173 if (!hdev->workqueue) {
3178 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3179 WQ_MEM_RECLAIM, 1, hdev->name);
3180 if (!hdev->req_workqueue) {
3181 destroy_workqueue(hdev->workqueue);
3186 if (!IS_ERR_OR_NULL(bt_debugfs))
3187 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3189 dev_set_name(&hdev->dev, "%s", hdev->name);
3191 error = device_add(&hdev->dev);
3195 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3196 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3199 if (rfkill_register(hdev->rfkill) < 0) {
3200 rfkill_destroy(hdev->rfkill);
3201 hdev->rfkill = NULL;
3205 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3206 hci_dev_set_flag(hdev, HCI_RFKILLED);
3208 hci_dev_set_flag(hdev, HCI_SETUP);
3209 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3211 if (hdev->dev_type == HCI_BREDR) {
3212 /* Assume BR/EDR support until proven otherwise (such as
3213 * through reading supported features during init.
3215 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3218 write_lock(&hci_dev_list_lock);
3219 list_add(&hdev->list, &hci_dev_list);
3220 write_unlock(&hci_dev_list_lock);
3222 /* Devices that are marked for raw-only usage are unconfigured
3223 * and should not be included in normal operation.
3225 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3226 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3228 hci_notify(hdev, HCI_DEV_REG);
3231 queue_work(hdev->req_workqueue, &hdev->power_on);
3236 destroy_workqueue(hdev->workqueue);
3237 destroy_workqueue(hdev->req_workqueue);
3239 ida_simple_remove(&hci_index_ida, hdev->id);
3243 EXPORT_SYMBOL(hci_register_dev);
3245 /* Unregister HCI device */
3246 void hci_unregister_dev(struct hci_dev *hdev)
3250 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3252 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3256 write_lock(&hci_dev_list_lock);
3257 list_del(&hdev->list);
3258 write_unlock(&hci_dev_list_lock);
3260 hci_dev_do_close(hdev);
3262 for (i = 0; i < NUM_REASSEMBLY; i++)
3263 kfree_skb(hdev->reassembly[i]);
3265 cancel_work_sync(&hdev->power_on);
3267 if (!test_bit(HCI_INIT, &hdev->flags) &&
3268 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3269 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3271 mgmt_index_removed(hdev);
3272 hci_dev_unlock(hdev);
3275 /* mgmt_index_removed should take care of emptying the
3277 BUG_ON(!list_empty(&hdev->mgmt_pending));
3279 hci_notify(hdev, HCI_DEV_UNREG);
3282 rfkill_unregister(hdev->rfkill);
3283 rfkill_destroy(hdev->rfkill);
3286 device_del(&hdev->dev);
3288 debugfs_remove_recursive(hdev->debugfs);
3290 destroy_workqueue(hdev->workqueue);
3291 destroy_workqueue(hdev->req_workqueue);
3294 hci_bdaddr_list_clear(&hdev->blacklist);
3295 hci_bdaddr_list_clear(&hdev->whitelist);
3296 hci_uuids_clear(hdev);
3297 hci_link_keys_clear(hdev);
3298 hci_smp_ltks_clear(hdev);
3299 hci_smp_irks_clear(hdev);
3300 hci_remote_oob_data_clear(hdev);
3301 hci_bdaddr_list_clear(&hdev->le_white_list);
3302 hci_conn_params_clear_all(hdev);
3303 hci_discovery_filter_clear(hdev);
3304 hci_dev_unlock(hdev);
3308 ida_simple_remove(&hci_index_ida, id);
3310 EXPORT_SYMBOL(hci_unregister_dev);
3312 /* Suspend HCI device */
3313 int hci_suspend_dev(struct hci_dev *hdev)
3315 hci_notify(hdev, HCI_DEV_SUSPEND);
3318 EXPORT_SYMBOL(hci_suspend_dev);
3320 /* Resume HCI device */
3321 int hci_resume_dev(struct hci_dev *hdev)
3323 hci_notify(hdev, HCI_DEV_RESUME);
3326 EXPORT_SYMBOL(hci_resume_dev);
3328 /* Reset HCI device */
3329 int hci_reset_dev(struct hci_dev *hdev)
3331 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3332 struct sk_buff *skb;
3334 skb = bt_skb_alloc(3, GFP_ATOMIC);
3338 bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
3339 memcpy(skb_put(skb, 3), hw_err, 3);
3341 /* Send Hardware Error to upper stack */
3342 return hci_recv_frame(hdev, skb);
3344 EXPORT_SYMBOL(hci_reset_dev);
3346 /* Receive frame from HCI drivers */
3347 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3349 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3350 && !test_bit(HCI_INIT, &hdev->flags))) {
3356 bt_cb(skb)->incoming = 1;
3359 __net_timestamp(skb);
3361 skb_queue_tail(&hdev->rx_q, skb);
3362 queue_work(hdev->workqueue, &hdev->rx_work);
3366 EXPORT_SYMBOL(hci_recv_frame);
3368 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
3369 int count, __u8 index)
3374 struct sk_buff *skb;
3375 struct bt_skb_cb *scb;
3377 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
3378 index >= NUM_REASSEMBLY)
3381 skb = hdev->reassembly[index];
3385 case HCI_ACLDATA_PKT:
3386 len = HCI_MAX_FRAME_SIZE;
3387 hlen = HCI_ACL_HDR_SIZE;
3390 len = HCI_MAX_EVENT_SIZE;
3391 hlen = HCI_EVENT_HDR_SIZE;
3393 case HCI_SCODATA_PKT:
3394 len = HCI_MAX_SCO_SIZE;
3395 hlen = HCI_SCO_HDR_SIZE;
3399 skb = bt_skb_alloc(len, GFP_ATOMIC);
3403 scb = (void *) skb->cb;
3405 scb->pkt_type = type;
3407 hdev->reassembly[index] = skb;
3411 scb = (void *) skb->cb;
3412 len = min_t(uint, scb->expect, count);
3414 memcpy(skb_put(skb, len), data, len);
3423 if (skb->len == HCI_EVENT_HDR_SIZE) {
3424 struct hci_event_hdr *h = hci_event_hdr(skb);
3425 scb->expect = h->plen;
3427 if (skb_tailroom(skb) < scb->expect) {
3429 hdev->reassembly[index] = NULL;
3435 case HCI_ACLDATA_PKT:
3436 if (skb->len == HCI_ACL_HDR_SIZE) {
3437 struct hci_acl_hdr *h = hci_acl_hdr(skb);
3438 scb->expect = __le16_to_cpu(h->dlen);
3440 if (skb_tailroom(skb) < scb->expect) {
3442 hdev->reassembly[index] = NULL;
3448 case HCI_SCODATA_PKT:
3449 if (skb->len == HCI_SCO_HDR_SIZE) {
3450 struct hci_sco_hdr *h = hci_sco_hdr(skb);
3451 scb->expect = h->dlen;
3453 if (skb_tailroom(skb) < scb->expect) {
3455 hdev->reassembly[index] = NULL;
3462 if (scb->expect == 0) {
3463 /* Complete frame */
3465 bt_cb(skb)->pkt_type = type;
3466 hci_recv_frame(hdev, skb);
3468 hdev->reassembly[index] = NULL;
3476 #define STREAM_REASSEMBLY 0
3478 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
3484 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
3487 struct { char type; } *pkt;
3489 /* Start of the frame */
3496 type = bt_cb(skb)->pkt_type;
3498 rem = hci_reassembly(hdev, type, data, count,
3503 data += (count - rem);
3509 EXPORT_SYMBOL(hci_recv_stream_fragment);
3511 /* ---- Interface to upper protocols ---- */
3513 int hci_register_cb(struct hci_cb *cb)
3515 BT_DBG("%p name %s", cb, cb->name);
3517 mutex_lock(&hci_cb_list_lock);
3518 list_add_tail(&cb->list, &hci_cb_list);
3519 mutex_unlock(&hci_cb_list_lock);
3523 EXPORT_SYMBOL(hci_register_cb);
3525 int hci_unregister_cb(struct hci_cb *cb)
3527 BT_DBG("%p name %s", cb, cb->name);
3529 mutex_lock(&hci_cb_list_lock);
3530 list_del(&cb->list);
3531 mutex_unlock(&hci_cb_list_lock);
3535 EXPORT_SYMBOL(hci_unregister_cb);
3537 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3541 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
3544 __net_timestamp(skb);
3546 /* Send copy to monitor */
3547 hci_send_to_monitor(hdev, skb);
3549 if (atomic_read(&hdev->promisc)) {
3550 /* Send copy to the sockets */
3551 hci_send_to_sock(hdev, skb);
3554 /* Get rid of skb owner, prior to sending to the driver. */
3557 err = hdev->send(hdev, skb);
3559 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3564 bool hci_req_pending(struct hci_dev *hdev)
3566 return (hdev->req_status == HCI_REQ_PEND);
3569 /* Send HCI command */
3570 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3573 struct sk_buff *skb;
3575 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3577 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3579 BT_ERR("%s no memory for command", hdev->name);
3583 /* Stand-alone HCI commands must be flagged as
3584 * single-command requests.
3586 bt_cb(skb)->req_start = 1;
3588 skb_queue_tail(&hdev->cmd_q, skb);
3589 queue_work(hdev->workqueue, &hdev->cmd_work);
3594 /* Get data from the previously sent command */
3595 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3597 struct hci_command_hdr *hdr;
3599 if (!hdev->sent_cmd)
3602 hdr = (void *) hdev->sent_cmd->data;
3604 if (hdr->opcode != cpu_to_le16(opcode))
3607 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3609 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3613 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3615 struct hci_acl_hdr *hdr;
3618 skb_push(skb, HCI_ACL_HDR_SIZE);
3619 skb_reset_transport_header(skb);
3620 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3621 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3622 hdr->dlen = cpu_to_le16(len);
3625 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3626 struct sk_buff *skb, __u16 flags)
3628 struct hci_conn *conn = chan->conn;
3629 struct hci_dev *hdev = conn->hdev;
3630 struct sk_buff *list;
3632 skb->len = skb_headlen(skb);
3635 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3637 switch (hdev->dev_type) {
3639 hci_add_acl_hdr(skb, conn->handle, flags);
3642 hci_add_acl_hdr(skb, chan->handle, flags);
3645 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3649 list = skb_shinfo(skb)->frag_list;
3651 /* Non fragmented */
3652 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3654 skb_queue_tail(queue, skb);
3657 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3659 skb_shinfo(skb)->frag_list = NULL;
3661 /* Queue all fragments atomically. We need to use spin_lock_bh
3662 * here because of 6LoWPAN links, as there this function is
3663 * called from softirq and using normal spin lock could cause
3666 spin_lock_bh(&queue->lock);
3668 __skb_queue_tail(queue, skb);
3670 flags &= ~ACL_START;
3673 skb = list; list = list->next;
3675 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3676 hci_add_acl_hdr(skb, conn->handle, flags);
3678 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3680 __skb_queue_tail(queue, skb);
3683 spin_unlock_bh(&queue->lock);
3687 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3689 struct hci_dev *hdev = chan->conn->hdev;
3691 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3693 hci_queue_acl(chan, &chan->data_q, skb, flags);
3695 queue_work(hdev->workqueue, &hdev->tx_work);
3699 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3701 struct hci_dev *hdev = conn->hdev;
3702 struct hci_sco_hdr hdr;
3704 BT_DBG("%s len %d", hdev->name, skb->len);
3706 hdr.handle = cpu_to_le16(conn->handle);
3707 hdr.dlen = skb->len;
3709 skb_push(skb, HCI_SCO_HDR_SIZE);
3710 skb_reset_transport_header(skb);
3711 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3713 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
3715 skb_queue_tail(&conn->data_q, skb);
3716 queue_work(hdev->workqueue, &hdev->tx_work);
3719 /* ---- HCI TX task (outgoing data) ---- */
3721 /* HCI Connection scheduler */
3722 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3725 struct hci_conn_hash *h = &hdev->conn_hash;
3726 struct hci_conn *conn = NULL, *c;
3727 unsigned int num = 0, min = ~0;
3729 /* We don't have to lock device here. Connections are always
3730 * added and removed with TX task disabled. */
3734 list_for_each_entry_rcu(c, &h->list, list) {
3735 if (c->type != type || skb_queue_empty(&c->data_q))
3738 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3743 if (c->sent < min) {
3748 if (hci_conn_num(hdev, type) == num)
3757 switch (conn->type) {
3759 cnt = hdev->acl_cnt;
3763 cnt = hdev->sco_cnt;
3766 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3770 BT_ERR("Unknown link type");
3778 BT_DBG("conn %p quote %d", conn, *quote);
3782 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3784 struct hci_conn_hash *h = &hdev->conn_hash;
3787 BT_ERR("%s link tx timeout", hdev->name);
3791 /* Kill stalled connections */
3792 list_for_each_entry_rcu(c, &h->list, list) {
3793 if (c->type == type && c->sent) {
3794 BT_ERR("%s killing stalled connection %pMR",
3795 hdev->name, &c->dst);
3796 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3803 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3806 struct hci_conn_hash *h = &hdev->conn_hash;
3807 struct hci_chan *chan = NULL;
3808 unsigned int num = 0, min = ~0, cur_prio = 0;
3809 struct hci_conn *conn;
3810 int cnt, q, conn_num = 0;
3812 BT_DBG("%s", hdev->name);
3816 list_for_each_entry_rcu(conn, &h->list, list) {
3817 struct hci_chan *tmp;
3819 if (conn->type != type)
3822 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3827 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3828 struct sk_buff *skb;
3830 if (skb_queue_empty(&tmp->data_q))
3833 skb = skb_peek(&tmp->data_q);
3834 if (skb->priority < cur_prio)
3837 if (skb->priority > cur_prio) {
3840 cur_prio = skb->priority;
3845 if (conn->sent < min) {
3851 if (hci_conn_num(hdev, type) == conn_num)
3860 switch (chan->conn->type) {
3862 cnt = hdev->acl_cnt;
3865 cnt = hdev->block_cnt;
3869 cnt = hdev->sco_cnt;
3872 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3876 BT_ERR("Unknown link type");
3881 BT_DBG("chan %p quote %d", chan, *quote);
3885 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3887 struct hci_conn_hash *h = &hdev->conn_hash;
3888 struct hci_conn *conn;
3891 BT_DBG("%s", hdev->name);
3895 list_for_each_entry_rcu(conn, &h->list, list) {
3896 struct hci_chan *chan;
3898 if (conn->type != type)
3901 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3906 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3907 struct sk_buff *skb;
3914 if (skb_queue_empty(&chan->data_q))
3917 skb = skb_peek(&chan->data_q);
3918 if (skb->priority >= HCI_PRIO_MAX - 1)
3921 skb->priority = HCI_PRIO_MAX - 1;
3923 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3927 if (hci_conn_num(hdev, type) == num)
3935 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3937 /* Calculate count of blocks used by this packet */
3938 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3941 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3943 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3944 /* ACL tx timeout must be longer than maximum
3945 * link supervision timeout (40.9 seconds) */
3946 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3947 HCI_ACL_TX_TIMEOUT))
3948 hci_link_tx_to(hdev, ACL_LINK);
3952 static void hci_sched_acl_pkt(struct hci_dev *hdev)
3954 unsigned int cnt = hdev->acl_cnt;
3955 struct hci_chan *chan;
3956 struct sk_buff *skb;
3959 __check_timeout(hdev, cnt);
3961 while (hdev->acl_cnt &&
3962 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3963 u32 priority = (skb_peek(&chan->data_q))->priority;
3964 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3965 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3966 skb->len, skb->priority);
3968 /* Stop if priority has changed */
3969 if (skb->priority < priority)
3972 skb = skb_dequeue(&chan->data_q);
3974 hci_conn_enter_active_mode(chan->conn,
3975 bt_cb(skb)->force_active);
3977 hci_send_frame(hdev, skb);
3978 hdev->acl_last_tx = jiffies;
3986 if (cnt != hdev->acl_cnt)
3987 hci_prio_recalculate(hdev, ACL_LINK);
3990 static void hci_sched_acl_blk(struct hci_dev *hdev)
3992 unsigned int cnt = hdev->block_cnt;
3993 struct hci_chan *chan;
3994 struct sk_buff *skb;
3998 __check_timeout(hdev, cnt);
4000 BT_DBG("%s", hdev->name);
4002 if (hdev->dev_type == HCI_AMP)
4007 while (hdev->block_cnt > 0 &&
4008 (chan = hci_chan_sent(hdev, type, "e))) {
4009 u32 priority = (skb_peek(&chan->data_q))->priority;
4010 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4013 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4014 skb->len, skb->priority);
4016 /* Stop if priority has changed */
4017 if (skb->priority < priority)
4020 skb = skb_dequeue(&chan->data_q);
4022 blocks = __get_blocks(hdev, skb);
4023 if (blocks > hdev->block_cnt)
4026 hci_conn_enter_active_mode(chan->conn,
4027 bt_cb(skb)->force_active);
4029 hci_send_frame(hdev, skb);
4030 hdev->acl_last_tx = jiffies;
4032 hdev->block_cnt -= blocks;
4035 chan->sent += blocks;
4036 chan->conn->sent += blocks;
4040 if (cnt != hdev->block_cnt)
4041 hci_prio_recalculate(hdev, type);
4044 static void hci_sched_acl(struct hci_dev *hdev)
4046 BT_DBG("%s", hdev->name);
4048 /* No ACL link over BR/EDR controller */
4049 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
4052 /* No AMP link over AMP controller */
4053 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4056 switch (hdev->flow_ctl_mode) {
4057 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4058 hci_sched_acl_pkt(hdev);
4061 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4062 hci_sched_acl_blk(hdev);
4068 static void hci_sched_sco(struct hci_dev *hdev)
4070 struct hci_conn *conn;
4071 struct sk_buff *skb;
4074 BT_DBG("%s", hdev->name);
4076 if (!hci_conn_num(hdev, SCO_LINK))
4079 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
4080 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4081 BT_DBG("skb %p len %d", skb, skb->len);
4082 hci_send_frame(hdev, skb);
4085 if (conn->sent == ~0)
4091 static void hci_sched_esco(struct hci_dev *hdev)
4093 struct hci_conn *conn;
4094 struct sk_buff *skb;
4097 BT_DBG("%s", hdev->name);
4099 if (!hci_conn_num(hdev, ESCO_LINK))
4102 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4104 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4105 BT_DBG("skb %p len %d", skb, skb->len);
4106 hci_send_frame(hdev, skb);
4109 if (conn->sent == ~0)
4115 static void hci_sched_le(struct hci_dev *hdev)
4117 struct hci_chan *chan;
4118 struct sk_buff *skb;
4119 int quote, cnt, tmp;
4121 BT_DBG("%s", hdev->name);
4123 if (!hci_conn_num(hdev, LE_LINK))
4126 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4127 /* LE tx timeout must be longer than maximum
4128 * link supervision timeout (40.9 seconds) */
4129 if (!hdev->le_cnt && hdev->le_pkts &&
4130 time_after(jiffies, hdev->le_last_tx + HZ * 45))
4131 hci_link_tx_to(hdev, LE_LINK);
4134 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4136 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
4137 u32 priority = (skb_peek(&chan->data_q))->priority;
4138 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4139 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4140 skb->len, skb->priority);
4142 /* Stop if priority has changed */
4143 if (skb->priority < priority)
4146 skb = skb_dequeue(&chan->data_q);
4148 hci_send_frame(hdev, skb);
4149 hdev->le_last_tx = jiffies;
4160 hdev->acl_cnt = cnt;
4163 hci_prio_recalculate(hdev, LE_LINK);
4166 static void hci_tx_work(struct work_struct *work)
4168 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4169 struct sk_buff *skb;
4171 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4172 hdev->sco_cnt, hdev->le_cnt);
4174 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4175 /* Schedule queues and send stuff to HCI driver */
4176 hci_sched_acl(hdev);
4177 hci_sched_sco(hdev);
4178 hci_sched_esco(hdev);
4182 /* Send next queued raw (unknown type) packet */
4183 while ((skb = skb_dequeue(&hdev->raw_q)))
4184 hci_send_frame(hdev, skb);
4187 /* ----- HCI RX task (incoming data processing) ----- */
4189 /* ACL data packet */
4190 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4192 struct hci_acl_hdr *hdr = (void *) skb->data;
4193 struct hci_conn *conn;
4194 __u16 handle, flags;
4196 skb_pull(skb, HCI_ACL_HDR_SIZE);
4198 handle = __le16_to_cpu(hdr->handle);
4199 flags = hci_flags(handle);
4200 handle = hci_handle(handle);
4202 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4205 hdev->stat.acl_rx++;
4208 conn = hci_conn_hash_lookup_handle(hdev, handle);
4209 hci_dev_unlock(hdev);
4212 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4214 /* Send to upper protocol */
4215 l2cap_recv_acldata(conn, skb, flags);
4218 BT_ERR("%s ACL packet for unknown connection handle %d",
4219 hdev->name, handle);
4225 /* SCO data packet */
4226 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4228 struct hci_sco_hdr *hdr = (void *) skb->data;
4229 struct hci_conn *conn;
4232 skb_pull(skb, HCI_SCO_HDR_SIZE);
4234 handle = __le16_to_cpu(hdr->handle);
4236 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4238 hdev->stat.sco_rx++;
4241 conn = hci_conn_hash_lookup_handle(hdev, handle);
4242 hci_dev_unlock(hdev);
4245 /* Send to upper protocol */
4246 sco_recv_scodata(conn, skb);
4249 BT_ERR("%s SCO packet for unknown connection handle %d",
4250 hdev->name, handle);
4256 static bool hci_req_is_complete(struct hci_dev *hdev)
4258 struct sk_buff *skb;
4260 skb = skb_peek(&hdev->cmd_q);
4264 return bt_cb(skb)->req_start;
4267 static void hci_resend_last(struct hci_dev *hdev)
4269 struct hci_command_hdr *sent;
4270 struct sk_buff *skb;
4273 if (!hdev->sent_cmd)
4276 sent = (void *) hdev->sent_cmd->data;
4277 opcode = __le16_to_cpu(sent->opcode);
4278 if (opcode == HCI_OP_RESET)
4281 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4285 skb_queue_head(&hdev->cmd_q, skb);
4286 queue_work(hdev->workqueue, &hdev->cmd_work);
4289 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
4291 hci_req_complete_t req_complete = NULL;
4292 struct sk_buff *skb;
4293 unsigned long flags;
4295 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4297 /* If the completed command doesn't match the last one that was
4298 * sent we need to do special handling of it.
4300 if (!hci_sent_cmd_data(hdev, opcode)) {
4301 /* Some CSR based controllers generate a spontaneous
4302 * reset complete event during init and any pending
4303 * command will never be completed. In such a case we
4304 * need to resend whatever was the last sent
4307 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4308 hci_resend_last(hdev);
4313 /* If the command succeeded and there's still more commands in
4314 * this request the request is not yet complete.
4316 if (!status && !hci_req_is_complete(hdev))
4319 /* If this was the last command in a request the complete
4320 * callback would be found in hdev->sent_cmd instead of the
4321 * command queue (hdev->cmd_q).
4323 if (hdev->sent_cmd) {
4324 req_complete = bt_cb(hdev->sent_cmd)->req_complete;
4327 /* We must set the complete callback to NULL to
4328 * avoid calling the callback more than once if
4329 * this function gets called again.
4331 bt_cb(hdev->sent_cmd)->req_complete = NULL;
4337 /* Remove all pending commands belonging to this request */
4338 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4339 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4340 if (bt_cb(skb)->req_start) {
4341 __skb_queue_head(&hdev->cmd_q, skb);
4345 req_complete = bt_cb(skb)->req_complete;
4348 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4352 req_complete(hdev, status, status ? opcode : HCI_OP_NOP);
4355 static void hci_rx_work(struct work_struct *work)
4357 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4358 struct sk_buff *skb;
4360 BT_DBG("%s", hdev->name);
4362 while ((skb = skb_dequeue(&hdev->rx_q))) {
4363 /* Send copy to monitor */
4364 hci_send_to_monitor(hdev, skb);
4366 if (atomic_read(&hdev->promisc)) {
4367 /* Send copy to the sockets */
4368 hci_send_to_sock(hdev, skb);
4371 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4376 if (test_bit(HCI_INIT, &hdev->flags)) {
4377 /* Don't process data packets in this states. */
4378 switch (bt_cb(skb)->pkt_type) {
4379 case HCI_ACLDATA_PKT:
4380 case HCI_SCODATA_PKT:
4387 switch (bt_cb(skb)->pkt_type) {
4389 BT_DBG("%s Event packet", hdev->name);
4390 hci_event_packet(hdev, skb);
4393 case HCI_ACLDATA_PKT:
4394 BT_DBG("%s ACL data packet", hdev->name);
4395 hci_acldata_packet(hdev, skb);
4398 case HCI_SCODATA_PKT:
4399 BT_DBG("%s SCO data packet", hdev->name);
4400 hci_scodata_packet(hdev, skb);
4410 static void hci_cmd_work(struct work_struct *work)
4412 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4413 struct sk_buff *skb;
4415 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4416 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4418 /* Send queued commands */
4419 if (atomic_read(&hdev->cmd_cnt)) {
4420 skb = skb_dequeue(&hdev->cmd_q);
4424 kfree_skb(hdev->sent_cmd);
4426 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4427 if (hdev->sent_cmd) {
4428 atomic_dec(&hdev->cmd_cnt);
4429 hci_send_frame(hdev, skb);
4430 if (test_bit(HCI_RESET, &hdev->flags))
4431 cancel_delayed_work(&hdev->cmd_timer);
4433 schedule_delayed_work(&hdev->cmd_timer,
4436 skb_queue_head(&hdev->cmd_q, skb);
4437 queue_work(hdev->workqueue, &hdev->cmd_work);