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 hci_inquiry_cache_flush(hdev);
2907 err = hci_req_run(&req, inquiry_complete);
2909 BT_ERR("Inquiry request failed: err %d", err);
2910 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2913 hci_dev_unlock(hdev);
2918 static void le_scan_disable_work(struct work_struct *work)
2920 struct hci_dev *hdev = container_of(work, struct hci_dev,
2921 le_scan_disable.work);
2922 struct hci_request req;
2925 BT_DBG("%s", hdev->name);
2927 cancel_delayed_work_sync(&hdev->le_scan_restart);
2929 hci_req_init(&req, hdev);
2931 hci_req_add_le_scan_disable(&req);
2933 err = hci_req_run(&req, le_scan_disable_work_complete);
2935 BT_ERR("Disable LE scanning request failed: err %d", err);
2938 static void le_scan_restart_work_complete(struct hci_dev *hdev, u8 status,
2941 unsigned long timeout, duration, scan_start, now;
2943 BT_DBG("%s", hdev->name);
2946 BT_ERR("Failed to restart LE scan: status %d", status);
2950 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
2951 !hdev->discovery.scan_start)
2954 /* When the scan was started, hdev->le_scan_disable has been queued
2955 * after duration from scan_start. During scan restart this job
2956 * has been canceled, and we need to queue it again after proper
2957 * timeout, to make sure that scan does not run indefinitely.
2959 duration = hdev->discovery.scan_duration;
2960 scan_start = hdev->discovery.scan_start;
2962 if (now - scan_start <= duration) {
2965 if (now >= scan_start)
2966 elapsed = now - scan_start;
2968 elapsed = ULONG_MAX - scan_start + now;
2970 timeout = duration - elapsed;
2974 queue_delayed_work(hdev->workqueue,
2975 &hdev->le_scan_disable, timeout);
2978 static void le_scan_restart_work(struct work_struct *work)
2980 struct hci_dev *hdev = container_of(work, struct hci_dev,
2981 le_scan_restart.work);
2982 struct hci_request req;
2983 struct hci_cp_le_set_scan_enable cp;
2986 BT_DBG("%s", hdev->name);
2988 /* If controller is not scanning we are done. */
2989 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2992 hci_req_init(&req, hdev);
2994 hci_req_add_le_scan_disable(&req);
2996 memset(&cp, 0, sizeof(cp));
2997 cp.enable = LE_SCAN_ENABLE;
2998 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
2999 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
3001 err = hci_req_run(&req, le_scan_restart_work_complete);
3003 BT_ERR("Restart LE scan request failed: err %d", err);
3006 /* Copy the Identity Address of the controller.
3008 * If the controller has a public BD_ADDR, then by default use that one.
3009 * If this is a LE only controller without a public address, default to
3010 * the static random address.
3012 * For debugging purposes it is possible to force controllers with a
3013 * public address to use the static random address instead.
3015 * In case BR/EDR has been disabled on a dual-mode controller and
3016 * userspace has configured a static address, then that address
3017 * becomes the identity address instead of the public BR/EDR address.
3019 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3022 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3023 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3024 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3025 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3026 bacpy(bdaddr, &hdev->static_addr);
3027 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3029 bacpy(bdaddr, &hdev->bdaddr);
3030 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3034 /* Alloc HCI device */
3035 struct hci_dev *hci_alloc_dev(void)
3037 struct hci_dev *hdev;
3039 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3043 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3044 hdev->esco_type = (ESCO_HV1);
3045 hdev->link_mode = (HCI_LM_ACCEPT);
3046 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3047 hdev->io_capability = 0x03; /* No Input No Output */
3048 hdev->manufacturer = 0xffff; /* Default to internal use */
3049 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3050 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3052 hdev->sniff_max_interval = 800;
3053 hdev->sniff_min_interval = 80;
3055 hdev->le_adv_channel_map = 0x07;
3056 hdev->le_adv_min_interval = 0x0800;
3057 hdev->le_adv_max_interval = 0x0800;
3058 hdev->le_scan_interval = 0x0060;
3059 hdev->le_scan_window = 0x0030;
3060 hdev->le_conn_min_interval = 0x0028;
3061 hdev->le_conn_max_interval = 0x0038;
3062 hdev->le_conn_latency = 0x0000;
3063 hdev->le_supv_timeout = 0x002a;
3064 hdev->le_def_tx_len = 0x001b;
3065 hdev->le_def_tx_time = 0x0148;
3066 hdev->le_max_tx_len = 0x001b;
3067 hdev->le_max_tx_time = 0x0148;
3068 hdev->le_max_rx_len = 0x001b;
3069 hdev->le_max_rx_time = 0x0148;
3071 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3072 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3073 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3074 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3076 mutex_init(&hdev->lock);
3077 mutex_init(&hdev->req_lock);
3079 INIT_LIST_HEAD(&hdev->mgmt_pending);
3080 INIT_LIST_HEAD(&hdev->blacklist);
3081 INIT_LIST_HEAD(&hdev->whitelist);
3082 INIT_LIST_HEAD(&hdev->uuids);
3083 INIT_LIST_HEAD(&hdev->link_keys);
3084 INIT_LIST_HEAD(&hdev->long_term_keys);
3085 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3086 INIT_LIST_HEAD(&hdev->remote_oob_data);
3087 INIT_LIST_HEAD(&hdev->le_white_list);
3088 INIT_LIST_HEAD(&hdev->le_conn_params);
3089 INIT_LIST_HEAD(&hdev->pend_le_conns);
3090 INIT_LIST_HEAD(&hdev->pend_le_reports);
3091 INIT_LIST_HEAD(&hdev->conn_hash.list);
3093 INIT_WORK(&hdev->rx_work, hci_rx_work);
3094 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3095 INIT_WORK(&hdev->tx_work, hci_tx_work);
3096 INIT_WORK(&hdev->power_on, hci_power_on);
3097 INIT_WORK(&hdev->error_reset, hci_error_reset);
3099 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3100 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
3101 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3102 INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
3104 skb_queue_head_init(&hdev->rx_q);
3105 skb_queue_head_init(&hdev->cmd_q);
3106 skb_queue_head_init(&hdev->raw_q);
3108 init_waitqueue_head(&hdev->req_wait_q);
3110 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3112 hci_init_sysfs(hdev);
3113 discovery_init(hdev);
3117 EXPORT_SYMBOL(hci_alloc_dev);
3119 /* Free HCI device */
3120 void hci_free_dev(struct hci_dev *hdev)
3122 /* will free via device release */
3123 put_device(&hdev->dev);
3125 EXPORT_SYMBOL(hci_free_dev);
3127 /* Register HCI device */
3128 int hci_register_dev(struct hci_dev *hdev)
3132 if (!hdev->open || !hdev->close || !hdev->send)
3135 /* Do not allow HCI_AMP devices to register at index 0,
3136 * so the index can be used as the AMP controller ID.
3138 switch (hdev->dev_type) {
3140 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3143 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3152 sprintf(hdev->name, "hci%d", id);
3155 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3157 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3158 WQ_MEM_RECLAIM, 1, hdev->name);
3159 if (!hdev->workqueue) {
3164 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3165 WQ_MEM_RECLAIM, 1, hdev->name);
3166 if (!hdev->req_workqueue) {
3167 destroy_workqueue(hdev->workqueue);
3172 if (!IS_ERR_OR_NULL(bt_debugfs))
3173 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3175 dev_set_name(&hdev->dev, "%s", hdev->name);
3177 error = device_add(&hdev->dev);
3181 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3182 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3185 if (rfkill_register(hdev->rfkill) < 0) {
3186 rfkill_destroy(hdev->rfkill);
3187 hdev->rfkill = NULL;
3191 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3192 hci_dev_set_flag(hdev, HCI_RFKILLED);
3194 hci_dev_set_flag(hdev, HCI_SETUP);
3195 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3197 if (hdev->dev_type == HCI_BREDR) {
3198 /* Assume BR/EDR support until proven otherwise (such as
3199 * through reading supported features during init.
3201 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3204 write_lock(&hci_dev_list_lock);
3205 list_add(&hdev->list, &hci_dev_list);
3206 write_unlock(&hci_dev_list_lock);
3208 /* Devices that are marked for raw-only usage are unconfigured
3209 * and should not be included in normal operation.
3211 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3212 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3214 hci_notify(hdev, HCI_DEV_REG);
3217 queue_work(hdev->req_workqueue, &hdev->power_on);
3222 destroy_workqueue(hdev->workqueue);
3223 destroy_workqueue(hdev->req_workqueue);
3225 ida_simple_remove(&hci_index_ida, hdev->id);
3229 EXPORT_SYMBOL(hci_register_dev);
3231 /* Unregister HCI device */
3232 void hci_unregister_dev(struct hci_dev *hdev)
3236 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3238 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3242 write_lock(&hci_dev_list_lock);
3243 list_del(&hdev->list);
3244 write_unlock(&hci_dev_list_lock);
3246 hci_dev_do_close(hdev);
3248 for (i = 0; i < NUM_REASSEMBLY; i++)
3249 kfree_skb(hdev->reassembly[i]);
3251 cancel_work_sync(&hdev->power_on);
3253 if (!test_bit(HCI_INIT, &hdev->flags) &&
3254 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3255 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3257 mgmt_index_removed(hdev);
3258 hci_dev_unlock(hdev);
3261 /* mgmt_index_removed should take care of emptying the
3263 BUG_ON(!list_empty(&hdev->mgmt_pending));
3265 hci_notify(hdev, HCI_DEV_UNREG);
3268 rfkill_unregister(hdev->rfkill);
3269 rfkill_destroy(hdev->rfkill);
3272 device_del(&hdev->dev);
3274 debugfs_remove_recursive(hdev->debugfs);
3276 destroy_workqueue(hdev->workqueue);
3277 destroy_workqueue(hdev->req_workqueue);
3280 hci_bdaddr_list_clear(&hdev->blacklist);
3281 hci_bdaddr_list_clear(&hdev->whitelist);
3282 hci_uuids_clear(hdev);
3283 hci_link_keys_clear(hdev);
3284 hci_smp_ltks_clear(hdev);
3285 hci_smp_irks_clear(hdev);
3286 hci_remote_oob_data_clear(hdev);
3287 hci_bdaddr_list_clear(&hdev->le_white_list);
3288 hci_conn_params_clear_all(hdev);
3289 hci_discovery_filter_clear(hdev);
3290 hci_dev_unlock(hdev);
3294 ida_simple_remove(&hci_index_ida, id);
3296 EXPORT_SYMBOL(hci_unregister_dev);
3298 /* Suspend HCI device */
3299 int hci_suspend_dev(struct hci_dev *hdev)
3301 hci_notify(hdev, HCI_DEV_SUSPEND);
3304 EXPORT_SYMBOL(hci_suspend_dev);
3306 /* Resume HCI device */
3307 int hci_resume_dev(struct hci_dev *hdev)
3309 hci_notify(hdev, HCI_DEV_RESUME);
3312 EXPORT_SYMBOL(hci_resume_dev);
3314 /* Reset HCI device */
3315 int hci_reset_dev(struct hci_dev *hdev)
3317 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3318 struct sk_buff *skb;
3320 skb = bt_skb_alloc(3, GFP_ATOMIC);
3324 bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
3325 memcpy(skb_put(skb, 3), hw_err, 3);
3327 /* Send Hardware Error to upper stack */
3328 return hci_recv_frame(hdev, skb);
3330 EXPORT_SYMBOL(hci_reset_dev);
3332 /* Receive frame from HCI drivers */
3333 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3335 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3336 && !test_bit(HCI_INIT, &hdev->flags))) {
3342 bt_cb(skb)->incoming = 1;
3345 __net_timestamp(skb);
3347 skb_queue_tail(&hdev->rx_q, skb);
3348 queue_work(hdev->workqueue, &hdev->rx_work);
3352 EXPORT_SYMBOL(hci_recv_frame);
3354 static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
3355 int count, __u8 index)
3360 struct sk_buff *skb;
3361 struct bt_skb_cb *scb;
3363 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
3364 index >= NUM_REASSEMBLY)
3367 skb = hdev->reassembly[index];
3371 case HCI_ACLDATA_PKT:
3372 len = HCI_MAX_FRAME_SIZE;
3373 hlen = HCI_ACL_HDR_SIZE;
3376 len = HCI_MAX_EVENT_SIZE;
3377 hlen = HCI_EVENT_HDR_SIZE;
3379 case HCI_SCODATA_PKT:
3380 len = HCI_MAX_SCO_SIZE;
3381 hlen = HCI_SCO_HDR_SIZE;
3385 skb = bt_skb_alloc(len, GFP_ATOMIC);
3389 scb = (void *) skb->cb;
3391 scb->pkt_type = type;
3393 hdev->reassembly[index] = skb;
3397 scb = (void *) skb->cb;
3398 len = min_t(uint, scb->expect, count);
3400 memcpy(skb_put(skb, len), data, len);
3409 if (skb->len == HCI_EVENT_HDR_SIZE) {
3410 struct hci_event_hdr *h = hci_event_hdr(skb);
3411 scb->expect = h->plen;
3413 if (skb_tailroom(skb) < scb->expect) {
3415 hdev->reassembly[index] = NULL;
3421 case HCI_ACLDATA_PKT:
3422 if (skb->len == HCI_ACL_HDR_SIZE) {
3423 struct hci_acl_hdr *h = hci_acl_hdr(skb);
3424 scb->expect = __le16_to_cpu(h->dlen);
3426 if (skb_tailroom(skb) < scb->expect) {
3428 hdev->reassembly[index] = NULL;
3434 case HCI_SCODATA_PKT:
3435 if (skb->len == HCI_SCO_HDR_SIZE) {
3436 struct hci_sco_hdr *h = hci_sco_hdr(skb);
3437 scb->expect = h->dlen;
3439 if (skb_tailroom(skb) < scb->expect) {
3441 hdev->reassembly[index] = NULL;
3448 if (scb->expect == 0) {
3449 /* Complete frame */
3451 bt_cb(skb)->pkt_type = type;
3452 hci_recv_frame(hdev, skb);
3454 hdev->reassembly[index] = NULL;
3462 #define STREAM_REASSEMBLY 0
3464 int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
3470 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
3473 struct { char type; } *pkt;
3475 /* Start of the frame */
3482 type = bt_cb(skb)->pkt_type;
3484 rem = hci_reassembly(hdev, type, data, count,
3489 data += (count - rem);
3495 EXPORT_SYMBOL(hci_recv_stream_fragment);
3497 /* ---- Interface to upper protocols ---- */
3499 int hci_register_cb(struct hci_cb *cb)
3501 BT_DBG("%p name %s", cb, cb->name);
3503 mutex_lock(&hci_cb_list_lock);
3504 list_add_tail(&cb->list, &hci_cb_list);
3505 mutex_unlock(&hci_cb_list_lock);
3509 EXPORT_SYMBOL(hci_register_cb);
3511 int hci_unregister_cb(struct hci_cb *cb)
3513 BT_DBG("%p name %s", cb, cb->name);
3515 mutex_lock(&hci_cb_list_lock);
3516 list_del(&cb->list);
3517 mutex_unlock(&hci_cb_list_lock);
3521 EXPORT_SYMBOL(hci_unregister_cb);
3523 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3527 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
3530 __net_timestamp(skb);
3532 /* Send copy to monitor */
3533 hci_send_to_monitor(hdev, skb);
3535 if (atomic_read(&hdev->promisc)) {
3536 /* Send copy to the sockets */
3537 hci_send_to_sock(hdev, skb);
3540 /* Get rid of skb owner, prior to sending to the driver. */
3543 err = hdev->send(hdev, skb);
3545 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3550 bool hci_req_pending(struct hci_dev *hdev)
3552 return (hdev->req_status == HCI_REQ_PEND);
3555 /* Send HCI command */
3556 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3559 struct sk_buff *skb;
3561 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3563 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3565 BT_ERR("%s no memory for command", hdev->name);
3569 /* Stand-alone HCI commands must be flagged as
3570 * single-command requests.
3572 bt_cb(skb)->req_start = 1;
3574 skb_queue_tail(&hdev->cmd_q, skb);
3575 queue_work(hdev->workqueue, &hdev->cmd_work);
3580 /* Get data from the previously sent command */
3581 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3583 struct hci_command_hdr *hdr;
3585 if (!hdev->sent_cmd)
3588 hdr = (void *) hdev->sent_cmd->data;
3590 if (hdr->opcode != cpu_to_le16(opcode))
3593 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3595 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3599 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3601 struct hci_acl_hdr *hdr;
3604 skb_push(skb, HCI_ACL_HDR_SIZE);
3605 skb_reset_transport_header(skb);
3606 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3607 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3608 hdr->dlen = cpu_to_le16(len);
3611 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3612 struct sk_buff *skb, __u16 flags)
3614 struct hci_conn *conn = chan->conn;
3615 struct hci_dev *hdev = conn->hdev;
3616 struct sk_buff *list;
3618 skb->len = skb_headlen(skb);
3621 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3623 switch (hdev->dev_type) {
3625 hci_add_acl_hdr(skb, conn->handle, flags);
3628 hci_add_acl_hdr(skb, chan->handle, flags);
3631 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3635 list = skb_shinfo(skb)->frag_list;
3637 /* Non fragmented */
3638 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3640 skb_queue_tail(queue, skb);
3643 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3645 skb_shinfo(skb)->frag_list = NULL;
3647 /* Queue all fragments atomically. We need to use spin_lock_bh
3648 * here because of 6LoWPAN links, as there this function is
3649 * called from softirq and using normal spin lock could cause
3652 spin_lock_bh(&queue->lock);
3654 __skb_queue_tail(queue, skb);
3656 flags &= ~ACL_START;
3659 skb = list; list = list->next;
3661 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3662 hci_add_acl_hdr(skb, conn->handle, flags);
3664 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3666 __skb_queue_tail(queue, skb);
3669 spin_unlock_bh(&queue->lock);
3673 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3675 struct hci_dev *hdev = chan->conn->hdev;
3677 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3679 hci_queue_acl(chan, &chan->data_q, skb, flags);
3681 queue_work(hdev->workqueue, &hdev->tx_work);
3685 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3687 struct hci_dev *hdev = conn->hdev;
3688 struct hci_sco_hdr hdr;
3690 BT_DBG("%s len %d", hdev->name, skb->len);
3692 hdr.handle = cpu_to_le16(conn->handle);
3693 hdr.dlen = skb->len;
3695 skb_push(skb, HCI_SCO_HDR_SIZE);
3696 skb_reset_transport_header(skb);
3697 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3699 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
3701 skb_queue_tail(&conn->data_q, skb);
3702 queue_work(hdev->workqueue, &hdev->tx_work);
3705 /* ---- HCI TX task (outgoing data) ---- */
3707 /* HCI Connection scheduler */
3708 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3711 struct hci_conn_hash *h = &hdev->conn_hash;
3712 struct hci_conn *conn = NULL, *c;
3713 unsigned int num = 0, min = ~0;
3715 /* We don't have to lock device here. Connections are always
3716 * added and removed with TX task disabled. */
3720 list_for_each_entry_rcu(c, &h->list, list) {
3721 if (c->type != type || skb_queue_empty(&c->data_q))
3724 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3729 if (c->sent < min) {
3734 if (hci_conn_num(hdev, type) == num)
3743 switch (conn->type) {
3745 cnt = hdev->acl_cnt;
3749 cnt = hdev->sco_cnt;
3752 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3756 BT_ERR("Unknown link type");
3764 BT_DBG("conn %p quote %d", conn, *quote);
3768 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3770 struct hci_conn_hash *h = &hdev->conn_hash;
3773 BT_ERR("%s link tx timeout", hdev->name);
3777 /* Kill stalled connections */
3778 list_for_each_entry_rcu(c, &h->list, list) {
3779 if (c->type == type && c->sent) {
3780 BT_ERR("%s killing stalled connection %pMR",
3781 hdev->name, &c->dst);
3782 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3789 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3792 struct hci_conn_hash *h = &hdev->conn_hash;
3793 struct hci_chan *chan = NULL;
3794 unsigned int num = 0, min = ~0, cur_prio = 0;
3795 struct hci_conn *conn;
3796 int cnt, q, conn_num = 0;
3798 BT_DBG("%s", hdev->name);
3802 list_for_each_entry_rcu(conn, &h->list, list) {
3803 struct hci_chan *tmp;
3805 if (conn->type != type)
3808 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3813 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3814 struct sk_buff *skb;
3816 if (skb_queue_empty(&tmp->data_q))
3819 skb = skb_peek(&tmp->data_q);
3820 if (skb->priority < cur_prio)
3823 if (skb->priority > cur_prio) {
3826 cur_prio = skb->priority;
3831 if (conn->sent < min) {
3837 if (hci_conn_num(hdev, type) == conn_num)
3846 switch (chan->conn->type) {
3848 cnt = hdev->acl_cnt;
3851 cnt = hdev->block_cnt;
3855 cnt = hdev->sco_cnt;
3858 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3862 BT_ERR("Unknown link type");
3867 BT_DBG("chan %p quote %d", chan, *quote);
3871 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3873 struct hci_conn_hash *h = &hdev->conn_hash;
3874 struct hci_conn *conn;
3877 BT_DBG("%s", hdev->name);
3881 list_for_each_entry_rcu(conn, &h->list, list) {
3882 struct hci_chan *chan;
3884 if (conn->type != type)
3887 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3892 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3893 struct sk_buff *skb;
3900 if (skb_queue_empty(&chan->data_q))
3903 skb = skb_peek(&chan->data_q);
3904 if (skb->priority >= HCI_PRIO_MAX - 1)
3907 skb->priority = HCI_PRIO_MAX - 1;
3909 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3913 if (hci_conn_num(hdev, type) == num)
3921 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3923 /* Calculate count of blocks used by this packet */
3924 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3927 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3929 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3930 /* ACL tx timeout must be longer than maximum
3931 * link supervision timeout (40.9 seconds) */
3932 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3933 HCI_ACL_TX_TIMEOUT))
3934 hci_link_tx_to(hdev, ACL_LINK);
3938 static void hci_sched_acl_pkt(struct hci_dev *hdev)
3940 unsigned int cnt = hdev->acl_cnt;
3941 struct hci_chan *chan;
3942 struct sk_buff *skb;
3945 __check_timeout(hdev, cnt);
3947 while (hdev->acl_cnt &&
3948 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3949 u32 priority = (skb_peek(&chan->data_q))->priority;
3950 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3951 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3952 skb->len, skb->priority);
3954 /* Stop if priority has changed */
3955 if (skb->priority < priority)
3958 skb = skb_dequeue(&chan->data_q);
3960 hci_conn_enter_active_mode(chan->conn,
3961 bt_cb(skb)->force_active);
3963 hci_send_frame(hdev, skb);
3964 hdev->acl_last_tx = jiffies;
3972 if (cnt != hdev->acl_cnt)
3973 hci_prio_recalculate(hdev, ACL_LINK);
3976 static void hci_sched_acl_blk(struct hci_dev *hdev)
3978 unsigned int cnt = hdev->block_cnt;
3979 struct hci_chan *chan;
3980 struct sk_buff *skb;
3984 __check_timeout(hdev, cnt);
3986 BT_DBG("%s", hdev->name);
3988 if (hdev->dev_type == HCI_AMP)
3993 while (hdev->block_cnt > 0 &&
3994 (chan = hci_chan_sent(hdev, type, "e))) {
3995 u32 priority = (skb_peek(&chan->data_q))->priority;
3996 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3999 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4000 skb->len, skb->priority);
4002 /* Stop if priority has changed */
4003 if (skb->priority < priority)
4006 skb = skb_dequeue(&chan->data_q);
4008 blocks = __get_blocks(hdev, skb);
4009 if (blocks > hdev->block_cnt)
4012 hci_conn_enter_active_mode(chan->conn,
4013 bt_cb(skb)->force_active);
4015 hci_send_frame(hdev, skb);
4016 hdev->acl_last_tx = jiffies;
4018 hdev->block_cnt -= blocks;
4021 chan->sent += blocks;
4022 chan->conn->sent += blocks;
4026 if (cnt != hdev->block_cnt)
4027 hci_prio_recalculate(hdev, type);
4030 static void hci_sched_acl(struct hci_dev *hdev)
4032 BT_DBG("%s", hdev->name);
4034 /* No ACL link over BR/EDR controller */
4035 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
4038 /* No AMP link over AMP controller */
4039 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4042 switch (hdev->flow_ctl_mode) {
4043 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4044 hci_sched_acl_pkt(hdev);
4047 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4048 hci_sched_acl_blk(hdev);
4054 static void hci_sched_sco(struct hci_dev *hdev)
4056 struct hci_conn *conn;
4057 struct sk_buff *skb;
4060 BT_DBG("%s", hdev->name);
4062 if (!hci_conn_num(hdev, SCO_LINK))
4065 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
4066 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4067 BT_DBG("skb %p len %d", skb, skb->len);
4068 hci_send_frame(hdev, skb);
4071 if (conn->sent == ~0)
4077 static void hci_sched_esco(struct hci_dev *hdev)
4079 struct hci_conn *conn;
4080 struct sk_buff *skb;
4083 BT_DBG("%s", hdev->name);
4085 if (!hci_conn_num(hdev, ESCO_LINK))
4088 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4090 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4091 BT_DBG("skb %p len %d", skb, skb->len);
4092 hci_send_frame(hdev, skb);
4095 if (conn->sent == ~0)
4101 static void hci_sched_le(struct hci_dev *hdev)
4103 struct hci_chan *chan;
4104 struct sk_buff *skb;
4105 int quote, cnt, tmp;
4107 BT_DBG("%s", hdev->name);
4109 if (!hci_conn_num(hdev, LE_LINK))
4112 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4113 /* LE tx timeout must be longer than maximum
4114 * link supervision timeout (40.9 seconds) */
4115 if (!hdev->le_cnt && hdev->le_pkts &&
4116 time_after(jiffies, hdev->le_last_tx + HZ * 45))
4117 hci_link_tx_to(hdev, LE_LINK);
4120 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4122 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
4123 u32 priority = (skb_peek(&chan->data_q))->priority;
4124 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4125 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4126 skb->len, skb->priority);
4128 /* Stop if priority has changed */
4129 if (skb->priority < priority)
4132 skb = skb_dequeue(&chan->data_q);
4134 hci_send_frame(hdev, skb);
4135 hdev->le_last_tx = jiffies;
4146 hdev->acl_cnt = cnt;
4149 hci_prio_recalculate(hdev, LE_LINK);
4152 static void hci_tx_work(struct work_struct *work)
4154 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4155 struct sk_buff *skb;
4157 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4158 hdev->sco_cnt, hdev->le_cnt);
4160 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4161 /* Schedule queues and send stuff to HCI driver */
4162 hci_sched_acl(hdev);
4163 hci_sched_sco(hdev);
4164 hci_sched_esco(hdev);
4168 /* Send next queued raw (unknown type) packet */
4169 while ((skb = skb_dequeue(&hdev->raw_q)))
4170 hci_send_frame(hdev, skb);
4173 /* ----- HCI RX task (incoming data processing) ----- */
4175 /* ACL data packet */
4176 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4178 struct hci_acl_hdr *hdr = (void *) skb->data;
4179 struct hci_conn *conn;
4180 __u16 handle, flags;
4182 skb_pull(skb, HCI_ACL_HDR_SIZE);
4184 handle = __le16_to_cpu(hdr->handle);
4185 flags = hci_flags(handle);
4186 handle = hci_handle(handle);
4188 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4191 hdev->stat.acl_rx++;
4194 conn = hci_conn_hash_lookup_handle(hdev, handle);
4195 hci_dev_unlock(hdev);
4198 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4200 /* Send to upper protocol */
4201 l2cap_recv_acldata(conn, skb, flags);
4204 BT_ERR("%s ACL packet for unknown connection handle %d",
4205 hdev->name, handle);
4211 /* SCO data packet */
4212 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4214 struct hci_sco_hdr *hdr = (void *) skb->data;
4215 struct hci_conn *conn;
4218 skb_pull(skb, HCI_SCO_HDR_SIZE);
4220 handle = __le16_to_cpu(hdr->handle);
4222 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4224 hdev->stat.sco_rx++;
4227 conn = hci_conn_hash_lookup_handle(hdev, handle);
4228 hci_dev_unlock(hdev);
4231 /* Send to upper protocol */
4232 sco_recv_scodata(conn, skb);
4235 BT_ERR("%s SCO packet for unknown connection handle %d",
4236 hdev->name, handle);
4242 static bool hci_req_is_complete(struct hci_dev *hdev)
4244 struct sk_buff *skb;
4246 skb = skb_peek(&hdev->cmd_q);
4250 return bt_cb(skb)->req_start;
4253 static void hci_resend_last(struct hci_dev *hdev)
4255 struct hci_command_hdr *sent;
4256 struct sk_buff *skb;
4259 if (!hdev->sent_cmd)
4262 sent = (void *) hdev->sent_cmd->data;
4263 opcode = __le16_to_cpu(sent->opcode);
4264 if (opcode == HCI_OP_RESET)
4267 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4271 skb_queue_head(&hdev->cmd_q, skb);
4272 queue_work(hdev->workqueue, &hdev->cmd_work);
4275 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status)
4277 hci_req_complete_t req_complete = NULL;
4278 struct sk_buff *skb;
4279 unsigned long flags;
4281 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4283 /* If the completed command doesn't match the last one that was
4284 * sent we need to do special handling of it.
4286 if (!hci_sent_cmd_data(hdev, opcode)) {
4287 /* Some CSR based controllers generate a spontaneous
4288 * reset complete event during init and any pending
4289 * command will never be completed. In such a case we
4290 * need to resend whatever was the last sent
4293 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4294 hci_resend_last(hdev);
4299 /* If the command succeeded and there's still more commands in
4300 * this request the request is not yet complete.
4302 if (!status && !hci_req_is_complete(hdev))
4305 /* If this was the last command in a request the complete
4306 * callback would be found in hdev->sent_cmd instead of the
4307 * command queue (hdev->cmd_q).
4309 if (hdev->sent_cmd) {
4310 req_complete = bt_cb(hdev->sent_cmd)->req_complete;
4313 /* We must set the complete callback to NULL to
4314 * avoid calling the callback more than once if
4315 * this function gets called again.
4317 bt_cb(hdev->sent_cmd)->req_complete = NULL;
4323 /* Remove all pending commands belonging to this request */
4324 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4325 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4326 if (bt_cb(skb)->req_start) {
4327 __skb_queue_head(&hdev->cmd_q, skb);
4331 req_complete = bt_cb(skb)->req_complete;
4334 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4338 req_complete(hdev, status, status ? opcode : HCI_OP_NOP);
4341 static void hci_rx_work(struct work_struct *work)
4343 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4344 struct sk_buff *skb;
4346 BT_DBG("%s", hdev->name);
4348 while ((skb = skb_dequeue(&hdev->rx_q))) {
4349 /* Send copy to monitor */
4350 hci_send_to_monitor(hdev, skb);
4352 if (atomic_read(&hdev->promisc)) {
4353 /* Send copy to the sockets */
4354 hci_send_to_sock(hdev, skb);
4357 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4362 if (test_bit(HCI_INIT, &hdev->flags)) {
4363 /* Don't process data packets in this states. */
4364 switch (bt_cb(skb)->pkt_type) {
4365 case HCI_ACLDATA_PKT:
4366 case HCI_SCODATA_PKT:
4373 switch (bt_cb(skb)->pkt_type) {
4375 BT_DBG("%s Event packet", hdev->name);
4376 hci_event_packet(hdev, skb);
4379 case HCI_ACLDATA_PKT:
4380 BT_DBG("%s ACL data packet", hdev->name);
4381 hci_acldata_packet(hdev, skb);
4384 case HCI_SCODATA_PKT:
4385 BT_DBG("%s SCO data packet", hdev->name);
4386 hci_scodata_packet(hdev, skb);
4396 static void hci_cmd_work(struct work_struct *work)
4398 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4399 struct sk_buff *skb;
4401 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4402 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4404 /* Send queued commands */
4405 if (atomic_read(&hdev->cmd_cnt)) {
4406 skb = skb_dequeue(&hdev->cmd_q);
4410 kfree_skb(hdev->sent_cmd);
4412 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4413 if (hdev->sent_cmd) {
4414 atomic_dec(&hdev->cmd_cnt);
4415 hci_send_frame(hdev, skb);
4416 if (test_bit(HCI_RESET, &hdev->flags))
4417 cancel_delayed_work(&hdev->cmd_timer);
4419 schedule_delayed_work(&hdev->cmd_timer,
4422 skb_queue_head(&hdev->cmd_q, skb);
4423 queue_work(hdev->workqueue, &hdev->cmd_work);