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/rfkill.h>
30 #include <linux/debugfs.h>
31 #include <linux/crypto.h>
32 #include <linux/property.h>
33 #include <linux/suspend.h>
34 #include <linux/wait.h>
35 #include <asm/unaligned.h>
37 #include <net/bluetooth/bluetooth.h>
38 #include <net/bluetooth/hci_core.h>
39 #include <net/bluetooth/l2cap.h>
40 #include <net/bluetooth/mgmt.h>
42 #include "hci_request.h"
43 #include "hci_debugfs.h"
48 static void hci_rx_work(struct work_struct *work);
49 static void hci_cmd_work(struct work_struct *work);
50 static void hci_tx_work(struct work_struct *work);
53 LIST_HEAD(hci_dev_list);
54 DEFINE_RWLOCK(hci_dev_list_lock);
56 /* HCI callback list */
57 LIST_HEAD(hci_cb_list);
58 DEFINE_MUTEX(hci_cb_list_lock);
60 /* HCI ID Numbering */
61 static DEFINE_IDA(hci_index_ida);
63 /* ---- HCI debugfs entries ---- */
65 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
66 size_t count, loff_t *ppos)
68 struct hci_dev *hdev = file->private_data;
71 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
74 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
77 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
78 size_t count, loff_t *ppos)
80 struct hci_dev *hdev = file->private_data;
85 if (!test_bit(HCI_UP, &hdev->flags))
88 err = kstrtobool_from_user(user_buf, count, &enable);
92 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
95 hci_req_sync_lock(hdev);
97 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
100 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
102 hci_req_sync_unlock(hdev);
109 hci_dev_change_flag(hdev, HCI_DUT_MODE);
114 static const struct file_operations dut_mode_fops = {
116 .read = dut_mode_read,
117 .write = dut_mode_write,
118 .llseek = default_llseek,
121 static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
122 size_t count, loff_t *ppos)
124 struct hci_dev *hdev = file->private_data;
127 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
130 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
133 static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
134 size_t count, loff_t *ppos)
136 struct hci_dev *hdev = file->private_data;
140 err = kstrtobool_from_user(user_buf, count, &enable);
144 /* When the diagnostic flags are not persistent and the transport
145 * is not active or in user channel operation, then there is no need
146 * for the vendor callback. Instead just store the desired value and
147 * the setting will be programmed when the controller gets powered on.
149 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
150 (!test_bit(HCI_RUNNING, &hdev->flags) ||
151 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
154 hci_req_sync_lock(hdev);
155 err = hdev->set_diag(hdev, enable);
156 hci_req_sync_unlock(hdev);
163 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
165 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
170 static const struct file_operations vendor_diag_fops = {
172 .read = vendor_diag_read,
173 .write = vendor_diag_write,
174 .llseek = default_llseek,
177 static void hci_debugfs_create_basic(struct hci_dev *hdev)
179 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
183 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
187 static int hci_reset_req(struct hci_request *req, unsigned long opt)
189 BT_DBG("%s %ld", req->hdev->name, opt);
192 set_bit(HCI_RESET, &req->hdev->flags);
193 hci_req_add(req, HCI_OP_RESET, 0, NULL);
197 static void bredr_init(struct hci_request *req)
199 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
201 /* Read Local Supported Features */
202 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
204 /* Read Local Version */
205 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
207 /* Read BD Address */
208 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
211 static void amp_init1(struct hci_request *req)
213 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
215 /* Read Local Version */
216 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
218 /* Read Local Supported Commands */
219 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
221 /* Read Local AMP Info */
222 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
224 /* Read Data Blk size */
225 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
227 /* Read Flow Control Mode */
228 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
230 /* Read Location Data */
231 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
234 static int amp_init2(struct hci_request *req)
236 /* Read Local Supported Features. Not all AMP controllers
237 * support this so it's placed conditionally in the second
240 if (req->hdev->commands[14] & 0x20)
241 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
246 static int hci_init1_req(struct hci_request *req, unsigned long opt)
248 struct hci_dev *hdev = req->hdev;
250 BT_DBG("%s %ld", hdev->name, opt);
253 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
254 hci_reset_req(req, 0);
256 switch (hdev->dev_type) {
264 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
271 static void bredr_setup(struct hci_request *req)
276 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
277 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
279 /* Read Class of Device */
280 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
282 /* Read Local Name */
283 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
285 /* Read Voice Setting */
286 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
288 /* Read Number of Supported IAC */
289 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
291 /* Read Current IAC LAP */
292 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
294 /* Clear Event Filters */
295 flt_type = HCI_FLT_CLEAR_ALL;
296 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
298 /* Connection accept timeout ~20 secs */
299 param = cpu_to_le16(0x7d00);
300 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
303 static void le_setup(struct hci_request *req)
305 struct hci_dev *hdev = req->hdev;
307 /* Read LE Buffer Size */
308 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
310 /* Read LE Local Supported Features */
311 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
313 /* Read LE Supported States */
314 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
316 /* LE-only controllers have LE implicitly enabled */
317 if (!lmp_bredr_capable(hdev))
318 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
321 static void hci_setup_event_mask(struct hci_request *req)
323 struct hci_dev *hdev = req->hdev;
325 /* The second byte is 0xff instead of 0x9f (two reserved bits
326 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
329 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
331 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
332 * any event mask for pre 1.2 devices.
334 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
337 if (lmp_bredr_capable(hdev)) {
338 events[4] |= 0x01; /* Flow Specification Complete */
340 /* Use a different default for LE-only devices */
341 memset(events, 0, sizeof(events));
342 events[1] |= 0x20; /* Command Complete */
343 events[1] |= 0x40; /* Command Status */
344 events[1] |= 0x80; /* Hardware Error */
346 /* If the controller supports the Disconnect command, enable
347 * the corresponding event. In addition enable packet flow
348 * control related events.
350 if (hdev->commands[0] & 0x20) {
351 events[0] |= 0x10; /* Disconnection Complete */
352 events[2] |= 0x04; /* Number of Completed Packets */
353 events[3] |= 0x02; /* Data Buffer Overflow */
356 /* If the controller supports the Read Remote Version
357 * Information command, enable the corresponding event.
359 if (hdev->commands[2] & 0x80)
360 events[1] |= 0x08; /* Read Remote Version Information
364 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
365 events[0] |= 0x80; /* Encryption Change */
366 events[5] |= 0x80; /* Encryption Key Refresh Complete */
370 if (lmp_inq_rssi_capable(hdev) ||
371 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
372 events[4] |= 0x02; /* Inquiry Result with RSSI */
374 if (lmp_ext_feat_capable(hdev))
375 events[4] |= 0x04; /* Read Remote Extended Features Complete */
377 if (lmp_esco_capable(hdev)) {
378 events[5] |= 0x08; /* Synchronous Connection Complete */
379 events[5] |= 0x10; /* Synchronous Connection Changed */
382 if (lmp_sniffsubr_capable(hdev))
383 events[5] |= 0x20; /* Sniff Subrating */
385 if (lmp_pause_enc_capable(hdev))
386 events[5] |= 0x80; /* Encryption Key Refresh Complete */
388 if (lmp_ext_inq_capable(hdev))
389 events[5] |= 0x40; /* Extended Inquiry Result */
391 if (lmp_no_flush_capable(hdev))
392 events[7] |= 0x01; /* Enhanced Flush Complete */
394 if (lmp_lsto_capable(hdev))
395 events[6] |= 0x80; /* Link Supervision Timeout Changed */
397 if (lmp_ssp_capable(hdev)) {
398 events[6] |= 0x01; /* IO Capability Request */
399 events[6] |= 0x02; /* IO Capability Response */
400 events[6] |= 0x04; /* User Confirmation Request */
401 events[6] |= 0x08; /* User Passkey Request */
402 events[6] |= 0x10; /* Remote OOB Data Request */
403 events[6] |= 0x20; /* Simple Pairing Complete */
404 events[7] |= 0x04; /* User Passkey Notification */
405 events[7] |= 0x08; /* Keypress Notification */
406 events[7] |= 0x10; /* Remote Host Supported
407 * Features Notification
411 if (lmp_le_capable(hdev))
412 events[7] |= 0x20; /* LE Meta-Event */
414 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
417 static int hci_init2_req(struct hci_request *req, unsigned long opt)
419 struct hci_dev *hdev = req->hdev;
421 if (hdev->dev_type == HCI_AMP)
422 return amp_init2(req);
424 if (lmp_bredr_capable(hdev))
427 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
429 if (lmp_le_capable(hdev))
432 /* All Bluetooth 1.2 and later controllers should support the
433 * HCI command for reading the local supported commands.
435 * Unfortunately some controllers indicate Bluetooth 1.2 support,
436 * but do not have support for this command. If that is the case,
437 * the driver can quirk the behavior and skip reading the local
438 * supported commands.
440 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
441 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
442 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
444 if (lmp_ssp_capable(hdev)) {
445 /* When SSP is available, then the host features page
446 * should also be available as well. However some
447 * controllers list the max_page as 0 as long as SSP
448 * has not been enabled. To achieve proper debugging
449 * output, force the minimum max_page to 1 at least.
451 hdev->max_page = 0x01;
453 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
456 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
457 sizeof(mode), &mode);
459 struct hci_cp_write_eir cp;
461 memset(hdev->eir, 0, sizeof(hdev->eir));
462 memset(&cp, 0, sizeof(cp));
464 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
468 if (lmp_inq_rssi_capable(hdev) ||
469 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
472 /* If Extended Inquiry Result events are supported, then
473 * they are clearly preferred over Inquiry Result with RSSI
476 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
478 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
481 if (lmp_inq_tx_pwr_capable(hdev))
482 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
484 if (lmp_ext_feat_capable(hdev)) {
485 struct hci_cp_read_local_ext_features cp;
488 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
492 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
494 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
501 static void hci_setup_link_policy(struct hci_request *req)
503 struct hci_dev *hdev = req->hdev;
504 struct hci_cp_write_def_link_policy cp;
507 if (lmp_rswitch_capable(hdev))
508 link_policy |= HCI_LP_RSWITCH;
509 if (lmp_hold_capable(hdev))
510 link_policy |= HCI_LP_HOLD;
511 if (lmp_sniff_capable(hdev))
512 link_policy |= HCI_LP_SNIFF;
513 if (lmp_park_capable(hdev))
514 link_policy |= HCI_LP_PARK;
516 cp.policy = cpu_to_le16(link_policy);
517 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
520 static void hci_set_le_support(struct hci_request *req)
522 struct hci_dev *hdev = req->hdev;
523 struct hci_cp_write_le_host_supported cp;
525 /* LE-only devices do not support explicit enablement */
526 if (!lmp_bredr_capable(hdev))
529 memset(&cp, 0, sizeof(cp));
531 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
536 if (cp.le != lmp_host_le_capable(hdev))
537 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
541 static void hci_set_event_mask_page_2(struct hci_request *req)
543 struct hci_dev *hdev = req->hdev;
544 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
545 bool changed = false;
547 /* If Connectionless Slave Broadcast master role is supported
548 * enable all necessary events for it.
550 if (lmp_csb_master_capable(hdev)) {
551 events[1] |= 0x40; /* Triggered Clock Capture */
552 events[1] |= 0x80; /* Synchronization Train Complete */
553 events[2] |= 0x10; /* Slave Page Response Timeout */
554 events[2] |= 0x20; /* CSB Channel Map Change */
558 /* If Connectionless Slave Broadcast slave role is supported
559 * enable all necessary events for it.
561 if (lmp_csb_slave_capable(hdev)) {
562 events[2] |= 0x01; /* Synchronization Train Received */
563 events[2] |= 0x02; /* CSB Receive */
564 events[2] |= 0x04; /* CSB Timeout */
565 events[2] |= 0x08; /* Truncated Page Complete */
569 /* Enable Authenticated Payload Timeout Expired event if supported */
570 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
575 /* Some Broadcom based controllers indicate support for Set Event
576 * Mask Page 2 command, but then actually do not support it. Since
577 * the default value is all bits set to zero, the command is only
578 * required if the event mask has to be changed. In case no change
579 * to the event mask is needed, skip this command.
582 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
583 sizeof(events), events);
586 static int hci_init3_req(struct hci_request *req, unsigned long opt)
588 struct hci_dev *hdev = req->hdev;
591 hci_setup_event_mask(req);
593 if (hdev->commands[6] & 0x20 &&
594 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
595 struct hci_cp_read_stored_link_key cp;
597 bacpy(&cp.bdaddr, BDADDR_ANY);
599 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
602 if (hdev->commands[5] & 0x10)
603 hci_setup_link_policy(req);
605 if (hdev->commands[8] & 0x01)
606 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
608 if (hdev->commands[18] & 0x04 &&
609 !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
610 hci_req_add(req, HCI_OP_READ_DEF_ERR_DATA_REPORTING, 0, NULL);
612 /* Some older Broadcom based Bluetooth 1.2 controllers do not
613 * support the Read Page Scan Type command. Check support for
614 * this command in the bit mask of supported commands.
616 if (hdev->commands[13] & 0x01)
617 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
619 if (lmp_le_capable(hdev)) {
622 memset(events, 0, sizeof(events));
624 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
625 events[0] |= 0x10; /* LE Long Term Key Request */
627 /* If controller supports the Connection Parameters Request
628 * Link Layer Procedure, enable the corresponding event.
630 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
631 events[0] |= 0x20; /* LE Remote Connection
635 /* If the controller supports the Data Length Extension
636 * feature, enable the corresponding event.
638 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
639 events[0] |= 0x40; /* LE Data Length Change */
641 /* If the controller supports LL Privacy feature, enable
642 * the corresponding event.
644 if (hdev->le_features[0] & HCI_LE_LL_PRIVACY)
645 events[1] |= 0x02; /* LE Enhanced Connection
649 /* If the controller supports Extended Scanner Filter
650 * Policies, enable the correspondig event.
652 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
653 events[1] |= 0x04; /* LE Direct Advertising
657 /* If the controller supports Channel Selection Algorithm #2
658 * feature, enable the corresponding event.
660 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
661 events[2] |= 0x08; /* LE Channel Selection
665 /* If the controller supports the LE Set Scan Enable command,
666 * enable the corresponding advertising report event.
668 if (hdev->commands[26] & 0x08)
669 events[0] |= 0x02; /* LE Advertising Report */
671 /* If the controller supports the LE Create Connection
672 * command, enable the corresponding event.
674 if (hdev->commands[26] & 0x10)
675 events[0] |= 0x01; /* LE Connection Complete */
677 /* If the controller supports the LE Connection Update
678 * command, enable the corresponding event.
680 if (hdev->commands[27] & 0x04)
681 events[0] |= 0x04; /* LE Connection Update
685 /* If the controller supports the LE Read Remote Used Features
686 * command, enable the corresponding event.
688 if (hdev->commands[27] & 0x20)
689 events[0] |= 0x08; /* LE Read Remote Used
693 /* If the controller supports the LE Read Local P-256
694 * Public Key command, enable the corresponding event.
696 if (hdev->commands[34] & 0x02)
697 events[0] |= 0x80; /* LE Read Local P-256
698 * Public Key Complete
701 /* If the controller supports the LE Generate DHKey
702 * command, enable the corresponding event.
704 if (hdev->commands[34] & 0x04)
705 events[1] |= 0x01; /* LE Generate DHKey Complete */
707 /* If the controller supports the LE Set Default PHY or
708 * LE Set PHY commands, enable the corresponding event.
710 if (hdev->commands[35] & (0x20 | 0x40))
711 events[1] |= 0x08; /* LE PHY Update Complete */
713 /* If the controller supports LE Set Extended Scan Parameters
714 * and LE Set Extended Scan Enable commands, enable the
715 * corresponding event.
717 if (use_ext_scan(hdev))
718 events[1] |= 0x10; /* LE Extended Advertising
722 /* If the controller supports the LE Extended Advertising
723 * command, enable the corresponding event.
725 if (ext_adv_capable(hdev))
726 events[2] |= 0x02; /* LE Advertising Set
730 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
733 /* Read LE Advertising Channel TX Power */
734 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
735 /* HCI TS spec forbids mixing of legacy and extended
736 * advertising commands wherein READ_ADV_TX_POWER is
737 * also included. So do not call it if extended adv
738 * is supported otherwise controller will return
739 * COMMAND_DISALLOWED for extended commands.
741 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
744 if (hdev->commands[26] & 0x40) {
745 /* Read LE Accept List Size */
746 hci_req_add(req, HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
750 if (hdev->commands[26] & 0x80) {
751 /* Clear LE Accept List */
752 hci_req_add(req, HCI_OP_LE_CLEAR_ACCEPT_LIST, 0, NULL);
755 if (hdev->commands[34] & 0x40) {
756 /* Read LE Resolving List Size */
757 hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
761 if (hdev->commands[34] & 0x20) {
762 /* Clear LE Resolving List */
763 hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
766 if (hdev->commands[35] & 0x04) {
767 __le16 rpa_timeout = cpu_to_le16(hdev->rpa_timeout);
769 /* Set RPA timeout */
770 hci_req_add(req, HCI_OP_LE_SET_RPA_TIMEOUT, 2,
774 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
775 /* Read LE Maximum Data Length */
776 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
778 /* Read LE Suggested Default Data Length */
779 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
782 if (ext_adv_capable(hdev)) {
783 /* Read LE Number of Supported Advertising Sets */
784 hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
788 hci_set_le_support(req);
791 /* Read features beyond page 1 if available */
792 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
793 struct hci_cp_read_local_ext_features cp;
796 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
803 static int hci_init4_req(struct hci_request *req, unsigned long opt)
805 struct hci_dev *hdev = req->hdev;
807 /* Some Broadcom based Bluetooth controllers do not support the
808 * Delete Stored Link Key command. They are clearly indicating its
809 * absence in the bit mask of supported commands.
811 * Check the supported commands and only if the command is marked
812 * as supported send it. If not supported assume that the controller
813 * does not have actual support for stored link keys which makes this
814 * command redundant anyway.
816 * Some controllers indicate that they support handling deleting
817 * stored link keys, but they don't. The quirk lets a driver
818 * just disable this command.
820 if (hdev->commands[6] & 0x80 &&
821 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
822 struct hci_cp_delete_stored_link_key cp;
824 bacpy(&cp.bdaddr, BDADDR_ANY);
825 cp.delete_all = 0x01;
826 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
830 /* Set event mask page 2 if the HCI command for it is supported */
831 if (hdev->commands[22] & 0x04)
832 hci_set_event_mask_page_2(req);
834 /* Read local codec list if the HCI command is supported */
835 if (hdev->commands[29] & 0x20)
836 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
838 /* Read local pairing options if the HCI command is supported */
839 if (hdev->commands[41] & 0x08)
840 hci_req_add(req, HCI_OP_READ_LOCAL_PAIRING_OPTS, 0, NULL);
842 /* Get MWS transport configuration if the HCI command is supported */
843 if (hdev->commands[30] & 0x08)
844 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
846 /* Check for Synchronization Train support */
847 if (lmp_sync_train_capable(hdev))
848 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
850 /* Enable Secure Connections if supported and configured */
851 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
852 bredr_sc_enabled(hdev)) {
855 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
856 sizeof(support), &support);
859 /* Set erroneous data reporting if supported to the wideband speech
862 if (hdev->commands[18] & 0x08 &&
863 !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks)) {
864 bool enabled = hci_dev_test_flag(hdev,
865 HCI_WIDEBAND_SPEECH_ENABLED);
868 (hdev->err_data_reporting == ERR_DATA_REPORTING_ENABLED)) {
869 struct hci_cp_write_def_err_data_reporting cp;
871 cp.err_data_reporting = enabled ?
872 ERR_DATA_REPORTING_ENABLED :
873 ERR_DATA_REPORTING_DISABLED;
875 hci_req_add(req, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
880 /* Set Suggested Default Data Length to maximum if supported */
881 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
882 struct hci_cp_le_write_def_data_len cp;
884 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
885 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
886 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
889 /* Set Default PHY parameters if command is supported */
890 if (hdev->commands[35] & 0x20) {
891 struct hci_cp_le_set_default_phy cp;
894 cp.tx_phys = hdev->le_tx_def_phys;
895 cp.rx_phys = hdev->le_rx_def_phys;
897 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
903 static int __hci_init(struct hci_dev *hdev)
907 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
911 if (hci_dev_test_flag(hdev, HCI_SETUP))
912 hci_debugfs_create_basic(hdev);
914 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
918 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
919 * BR/EDR/LE type controllers. AMP controllers only need the
920 * first two stages of init.
922 if (hdev->dev_type != HCI_PRIMARY)
925 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
929 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
933 /* This function is only called when the controller is actually in
934 * configured state. When the controller is marked as unconfigured,
935 * this initialization procedure is not run.
937 * It means that it is possible that a controller runs through its
938 * setup phase and then discovers missing settings. If that is the
939 * case, then this function will not be called. It then will only
940 * be called during the config phase.
942 * So only when in setup phase or config phase, create the debugfs
943 * entries and register the SMP channels.
945 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
946 !hci_dev_test_flag(hdev, HCI_CONFIG))
949 hci_debugfs_create_common(hdev);
951 if (lmp_bredr_capable(hdev))
952 hci_debugfs_create_bredr(hdev);
954 if (lmp_le_capable(hdev))
955 hci_debugfs_create_le(hdev);
960 static int hci_init0_req(struct hci_request *req, unsigned long opt)
962 struct hci_dev *hdev = req->hdev;
964 BT_DBG("%s %ld", hdev->name, opt);
967 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
968 hci_reset_req(req, 0);
970 /* Read Local Version */
971 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
973 /* Read BD Address */
974 if (hdev->set_bdaddr)
975 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
980 static int __hci_unconf_init(struct hci_dev *hdev)
984 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
987 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
991 if (hci_dev_test_flag(hdev, HCI_SETUP))
992 hci_debugfs_create_basic(hdev);
997 static int hci_scan_req(struct hci_request *req, unsigned long opt)
1001 BT_DBG("%s %x", req->hdev->name, scan);
1003 /* Inquiry and Page scans */
1004 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1008 static int hci_auth_req(struct hci_request *req, unsigned long opt)
1012 BT_DBG("%s %x", req->hdev->name, auth);
1014 /* Authentication */
1015 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1019 static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
1023 BT_DBG("%s %x", req->hdev->name, encrypt);
1026 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1030 static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
1032 __le16 policy = cpu_to_le16(opt);
1034 BT_DBG("%s %x", req->hdev->name, policy);
1036 /* Default link policy */
1037 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1041 /* Get HCI device by index.
1042 * Device is held on return. */
1043 struct hci_dev *hci_dev_get(int index)
1045 struct hci_dev *hdev = NULL, *d;
1047 BT_DBG("%d", index);
1052 read_lock(&hci_dev_list_lock);
1053 list_for_each_entry(d, &hci_dev_list, list) {
1054 if (d->id == index) {
1055 hdev = hci_dev_hold(d);
1059 read_unlock(&hci_dev_list_lock);
1063 /* ---- Inquiry support ---- */
1065 bool hci_discovery_active(struct hci_dev *hdev)
1067 struct discovery_state *discov = &hdev->discovery;
1069 switch (discov->state) {
1070 case DISCOVERY_FINDING:
1071 case DISCOVERY_RESOLVING:
1079 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1081 int old_state = hdev->discovery.state;
1083 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1085 if (old_state == state)
1088 hdev->discovery.state = state;
1091 case DISCOVERY_STOPPED:
1092 hci_update_background_scan(hdev);
1094 if (old_state != DISCOVERY_STARTING)
1095 mgmt_discovering(hdev, 0);
1097 case DISCOVERY_STARTING:
1099 case DISCOVERY_FINDING:
1100 mgmt_discovering(hdev, 1);
1102 case DISCOVERY_RESOLVING:
1104 case DISCOVERY_STOPPING:
1109 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1111 struct discovery_state *cache = &hdev->discovery;
1112 struct inquiry_entry *p, *n;
1114 list_for_each_entry_safe(p, n, &cache->all, all) {
1119 INIT_LIST_HEAD(&cache->unknown);
1120 INIT_LIST_HEAD(&cache->resolve);
1123 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1126 struct discovery_state *cache = &hdev->discovery;
1127 struct inquiry_entry *e;
1129 BT_DBG("cache %p, %pMR", cache, bdaddr);
1131 list_for_each_entry(e, &cache->all, all) {
1132 if (!bacmp(&e->data.bdaddr, bdaddr))
1139 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1142 struct discovery_state *cache = &hdev->discovery;
1143 struct inquiry_entry *e;
1145 BT_DBG("cache %p, %pMR", cache, bdaddr);
1147 list_for_each_entry(e, &cache->unknown, list) {
1148 if (!bacmp(&e->data.bdaddr, bdaddr))
1155 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1159 struct discovery_state *cache = &hdev->discovery;
1160 struct inquiry_entry *e;
1162 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1164 list_for_each_entry(e, &cache->resolve, list) {
1165 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1167 if (!bacmp(&e->data.bdaddr, bdaddr))
1174 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1175 struct inquiry_entry *ie)
1177 struct discovery_state *cache = &hdev->discovery;
1178 struct list_head *pos = &cache->resolve;
1179 struct inquiry_entry *p;
1181 list_del(&ie->list);
1183 list_for_each_entry(p, &cache->resolve, list) {
1184 if (p->name_state != NAME_PENDING &&
1185 abs(p->data.rssi) >= abs(ie->data.rssi))
1190 list_add(&ie->list, pos);
1193 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1196 struct discovery_state *cache = &hdev->discovery;
1197 struct inquiry_entry *ie;
1200 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1202 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1204 if (!data->ssp_mode)
1205 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1207 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1209 if (!ie->data.ssp_mode)
1210 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1212 if (ie->name_state == NAME_NEEDED &&
1213 data->rssi != ie->data.rssi) {
1214 ie->data.rssi = data->rssi;
1215 hci_inquiry_cache_update_resolve(hdev, ie);
1221 /* Entry not in the cache. Add new one. */
1222 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1224 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1228 list_add(&ie->all, &cache->all);
1231 ie->name_state = NAME_KNOWN;
1233 ie->name_state = NAME_NOT_KNOWN;
1234 list_add(&ie->list, &cache->unknown);
1238 if (name_known && ie->name_state != NAME_KNOWN &&
1239 ie->name_state != NAME_PENDING) {
1240 ie->name_state = NAME_KNOWN;
1241 list_del(&ie->list);
1244 memcpy(&ie->data, data, sizeof(*data));
1245 ie->timestamp = jiffies;
1246 cache->timestamp = jiffies;
1248 if (ie->name_state == NAME_NOT_KNOWN)
1249 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1255 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1257 struct discovery_state *cache = &hdev->discovery;
1258 struct inquiry_info *info = (struct inquiry_info *) buf;
1259 struct inquiry_entry *e;
1262 list_for_each_entry(e, &cache->all, all) {
1263 struct inquiry_data *data = &e->data;
1268 bacpy(&info->bdaddr, &data->bdaddr);
1269 info->pscan_rep_mode = data->pscan_rep_mode;
1270 info->pscan_period_mode = data->pscan_period_mode;
1271 info->pscan_mode = data->pscan_mode;
1272 memcpy(info->dev_class, data->dev_class, 3);
1273 info->clock_offset = data->clock_offset;
1279 BT_DBG("cache %p, copied %d", cache, copied);
1283 static int hci_inq_req(struct hci_request *req, unsigned long opt)
1285 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1286 struct hci_dev *hdev = req->hdev;
1287 struct hci_cp_inquiry cp;
1289 BT_DBG("%s", hdev->name);
1291 if (test_bit(HCI_INQUIRY, &hdev->flags))
1295 memcpy(&cp.lap, &ir->lap, 3);
1296 cp.length = ir->length;
1297 cp.num_rsp = ir->num_rsp;
1298 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1303 int hci_inquiry(void __user *arg)
1305 __u8 __user *ptr = arg;
1306 struct hci_inquiry_req ir;
1307 struct hci_dev *hdev;
1308 int err = 0, do_inquiry = 0, max_rsp;
1312 if (copy_from_user(&ir, ptr, sizeof(ir)))
1315 hdev = hci_dev_get(ir.dev_id);
1319 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1324 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1329 if (hdev->dev_type != HCI_PRIMARY) {
1334 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1339 /* Restrict maximum inquiry length to 60 seconds */
1340 if (ir.length > 60) {
1346 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1347 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1348 hci_inquiry_cache_flush(hdev);
1351 hci_dev_unlock(hdev);
1353 timeo = ir.length * msecs_to_jiffies(2000);
1356 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1361 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1362 * cleared). If it is interrupted by a signal, return -EINTR.
1364 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1365 TASK_INTERRUPTIBLE)) {
1371 /* for unlimited number of responses we will use buffer with
1374 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1376 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1377 * copy it to the user space.
1379 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1386 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1387 hci_dev_unlock(hdev);
1389 BT_DBG("num_rsp %d", ir.num_rsp);
1391 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1393 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1407 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
1408 * (BD_ADDR) for a HCI device from
1409 * a firmware node property.
1410 * @hdev: The HCI device
1412 * Search the firmware node for 'local-bd-address'.
1414 * All-zero BD addresses are rejected, because those could be properties
1415 * that exist in the firmware tables, but were not updated by the firmware. For
1416 * example, the DTS could define 'local-bd-address', with zero BD addresses.
1418 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
1420 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
1424 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
1425 (u8 *)&ba, sizeof(ba));
1426 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
1429 bacpy(&hdev->public_addr, &ba);
1432 static int hci_dev_do_open(struct hci_dev *hdev)
1436 BT_DBG("%s %p", hdev->name, hdev);
1438 hci_req_sync_lock(hdev);
1440 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1445 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1446 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1447 /* Check for rfkill but allow the HCI setup stage to
1448 * proceed (which in itself doesn't cause any RF activity).
1450 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1455 /* Check for valid public address or a configured static
1456 * random adddress, but let the HCI setup proceed to
1457 * be able to determine if there is a public address
1460 * In case of user channel usage, it is not important
1461 * if a public address or static random address is
1464 * This check is only valid for BR/EDR controllers
1465 * since AMP controllers do not have an address.
1467 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1468 hdev->dev_type == HCI_PRIMARY &&
1469 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1470 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1471 ret = -EADDRNOTAVAIL;
1476 if (test_bit(HCI_UP, &hdev->flags)) {
1481 if (hdev->open(hdev)) {
1486 set_bit(HCI_RUNNING, &hdev->flags);
1487 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1489 atomic_set(&hdev->cmd_cnt, 1);
1490 set_bit(HCI_INIT, &hdev->flags);
1492 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1493 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1494 bool invalid_bdaddr;
1496 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1499 ret = hdev->setup(hdev);
1501 /* The transport driver can set the quirk to mark the
1502 * BD_ADDR invalid before creating the HCI device or in
1503 * its setup callback.
1505 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
1511 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
1512 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
1513 hci_dev_get_bd_addr_from_property(hdev);
1515 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1517 ret = hdev->set_bdaddr(hdev,
1518 &hdev->public_addr);
1520 /* If setting of the BD_ADDR from the device
1521 * property succeeds, then treat the address
1522 * as valid even if the invalid BD_ADDR
1523 * quirk indicates otherwise.
1526 invalid_bdaddr = false;
1531 /* The transport driver can set these quirks before
1532 * creating the HCI device or in its setup callback.
1534 * For the invalid BD_ADDR quirk it is possible that
1535 * it becomes a valid address if the bootloader does
1536 * provide it (see above).
1538 * In case any of them is set, the controller has to
1539 * start up as unconfigured.
1541 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1543 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1545 /* For an unconfigured controller it is required to
1546 * read at least the version information provided by
1547 * the Read Local Version Information command.
1549 * If the set_bdaddr driver callback is provided, then
1550 * also the original Bluetooth public device address
1551 * will be read using the Read BD Address command.
1553 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1554 ret = __hci_unconf_init(hdev);
1557 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1558 /* If public address change is configured, ensure that
1559 * the address gets programmed. If the driver does not
1560 * support changing the public address, fail the power
1563 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1565 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1567 ret = -EADDRNOTAVAIL;
1571 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1572 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1573 ret = __hci_init(hdev);
1574 if (!ret && hdev->post_init)
1575 ret = hdev->post_init(hdev);
1579 /* If the HCI Reset command is clearing all diagnostic settings,
1580 * then they need to be reprogrammed after the init procedure
1583 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1584 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1585 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1586 ret = hdev->set_diag(hdev, true);
1590 clear_bit(HCI_INIT, &hdev->flags);
1594 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1595 hci_adv_instances_set_rpa_expired(hdev, true);
1596 set_bit(HCI_UP, &hdev->flags);
1597 hci_sock_dev_event(hdev, HCI_DEV_UP);
1598 hci_leds_update_powered(hdev, true);
1599 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1600 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1601 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1602 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1603 hci_dev_test_flag(hdev, HCI_MGMT) &&
1604 hdev->dev_type == HCI_PRIMARY) {
1605 ret = __hci_req_hci_power_on(hdev);
1606 mgmt_power_on(hdev, ret);
1609 /* Init failed, cleanup */
1610 flush_work(&hdev->tx_work);
1612 /* Since hci_rx_work() is possible to awake new cmd_work
1613 * it should be flushed first to avoid unexpected call of
1616 flush_work(&hdev->rx_work);
1617 flush_work(&hdev->cmd_work);
1619 skb_queue_purge(&hdev->cmd_q);
1620 skb_queue_purge(&hdev->rx_q);
1625 if (hdev->sent_cmd) {
1626 kfree_skb(hdev->sent_cmd);
1627 hdev->sent_cmd = NULL;
1630 clear_bit(HCI_RUNNING, &hdev->flags);
1631 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1634 hdev->flags &= BIT(HCI_RAW);
1638 hci_req_sync_unlock(hdev);
1642 /* ---- HCI ioctl helpers ---- */
1644 int hci_dev_open(__u16 dev)
1646 struct hci_dev *hdev;
1649 hdev = hci_dev_get(dev);
1653 /* Devices that are marked as unconfigured can only be powered
1654 * up as user channel. Trying to bring them up as normal devices
1655 * will result into a failure. Only user channel operation is
1658 * When this function is called for a user channel, the flag
1659 * HCI_USER_CHANNEL will be set first before attempting to
1662 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1663 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1668 /* We need to ensure that no other power on/off work is pending
1669 * before proceeding to call hci_dev_do_open. This is
1670 * particularly important if the setup procedure has not yet
1673 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1674 cancel_delayed_work(&hdev->power_off);
1676 /* After this call it is guaranteed that the setup procedure
1677 * has finished. This means that error conditions like RFKILL
1678 * or no valid public or static random address apply.
1680 flush_workqueue(hdev->req_workqueue);
1682 /* For controllers not using the management interface and that
1683 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1684 * so that pairing works for them. Once the management interface
1685 * is in use this bit will be cleared again and userspace has
1686 * to explicitly enable it.
1688 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1689 !hci_dev_test_flag(hdev, HCI_MGMT))
1690 hci_dev_set_flag(hdev, HCI_BONDABLE);
1692 err = hci_dev_do_open(hdev);
1699 /* This function requires the caller holds hdev->lock */
1700 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1702 struct hci_conn_params *p;
1704 list_for_each_entry(p, &hdev->le_conn_params, list) {
1706 hci_conn_drop(p->conn);
1707 hci_conn_put(p->conn);
1710 list_del_init(&p->action);
1713 BT_DBG("All LE pending actions cleared");
1716 int hci_dev_do_close(struct hci_dev *hdev)
1720 BT_DBG("%s %p", hdev->name, hdev);
1722 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1723 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1724 test_bit(HCI_UP, &hdev->flags)) {
1725 /* Execute vendor specific shutdown routine */
1727 hdev->shutdown(hdev);
1730 cancel_delayed_work(&hdev->power_off);
1732 hci_request_cancel_all(hdev);
1733 hci_req_sync_lock(hdev);
1735 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1736 cancel_delayed_work_sync(&hdev->cmd_timer);
1737 hci_req_sync_unlock(hdev);
1741 hci_leds_update_powered(hdev, false);
1743 /* Flush RX and TX works */
1744 flush_work(&hdev->tx_work);
1745 flush_work(&hdev->rx_work);
1747 if (hdev->discov_timeout > 0) {
1748 hdev->discov_timeout = 0;
1749 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1750 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1753 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1754 cancel_delayed_work(&hdev->service_cache);
1756 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
1757 struct adv_info *adv_instance;
1759 cancel_delayed_work_sync(&hdev->rpa_expired);
1761 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
1762 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1765 /* Avoid potential lockdep warnings from the *_flush() calls by
1766 * ensuring the workqueue is empty up front.
1768 drain_workqueue(hdev->workqueue);
1772 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1774 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1776 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1777 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1778 hci_dev_test_flag(hdev, HCI_MGMT))
1779 __mgmt_power_off(hdev);
1781 hci_inquiry_cache_flush(hdev);
1782 hci_pend_le_actions_clear(hdev);
1783 hci_conn_hash_flush(hdev);
1784 hci_dev_unlock(hdev);
1786 smp_unregister(hdev);
1788 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1790 msft_do_close(hdev);
1796 skb_queue_purge(&hdev->cmd_q);
1797 atomic_set(&hdev->cmd_cnt, 1);
1798 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1799 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1800 set_bit(HCI_INIT, &hdev->flags);
1801 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1802 clear_bit(HCI_INIT, &hdev->flags);
1805 /* flush cmd work */
1806 flush_work(&hdev->cmd_work);
1809 skb_queue_purge(&hdev->rx_q);
1810 skb_queue_purge(&hdev->cmd_q);
1811 skb_queue_purge(&hdev->raw_q);
1813 /* Drop last sent command */
1814 if (hdev->sent_cmd) {
1815 cancel_delayed_work_sync(&hdev->cmd_timer);
1816 kfree_skb(hdev->sent_cmd);
1817 hdev->sent_cmd = NULL;
1820 clear_bit(HCI_RUNNING, &hdev->flags);
1821 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1823 if (test_and_clear_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks))
1824 wake_up(&hdev->suspend_wait_q);
1826 /* After this point our queues are empty
1827 * and no tasks are scheduled. */
1831 hdev->flags &= BIT(HCI_RAW);
1832 hci_dev_clear_volatile_flags(hdev);
1834 /* Controller radio is available but is currently powered down */
1835 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1837 memset(hdev->eir, 0, sizeof(hdev->eir));
1838 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1839 bacpy(&hdev->random_addr, BDADDR_ANY);
1841 hci_req_sync_unlock(hdev);
1847 int hci_dev_close(__u16 dev)
1849 struct hci_dev *hdev;
1852 hdev = hci_dev_get(dev);
1856 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1861 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1862 cancel_delayed_work(&hdev->power_off);
1864 err = hci_dev_do_close(hdev);
1871 static int hci_dev_do_reset(struct hci_dev *hdev)
1875 BT_DBG("%s %p", hdev->name, hdev);
1877 hci_req_sync_lock(hdev);
1880 skb_queue_purge(&hdev->rx_q);
1881 skb_queue_purge(&hdev->cmd_q);
1883 /* Avoid potential lockdep warnings from the *_flush() calls by
1884 * ensuring the workqueue is empty up front.
1886 drain_workqueue(hdev->workqueue);
1889 hci_inquiry_cache_flush(hdev);
1890 hci_conn_hash_flush(hdev);
1891 hci_dev_unlock(hdev);
1896 atomic_set(&hdev->cmd_cnt, 1);
1897 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1899 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1901 hci_req_sync_unlock(hdev);
1905 int hci_dev_reset(__u16 dev)
1907 struct hci_dev *hdev;
1910 hdev = hci_dev_get(dev);
1914 if (!test_bit(HCI_UP, &hdev->flags)) {
1919 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1924 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1929 err = hci_dev_do_reset(hdev);
1936 int hci_dev_reset_stat(__u16 dev)
1938 struct hci_dev *hdev;
1941 hdev = hci_dev_get(dev);
1945 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1950 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1955 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1962 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1964 bool conn_changed, discov_changed;
1966 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1968 if ((scan & SCAN_PAGE))
1969 conn_changed = !hci_dev_test_and_set_flag(hdev,
1972 conn_changed = hci_dev_test_and_clear_flag(hdev,
1975 if ((scan & SCAN_INQUIRY)) {
1976 discov_changed = !hci_dev_test_and_set_flag(hdev,
1979 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1980 discov_changed = hci_dev_test_and_clear_flag(hdev,
1984 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1987 if (conn_changed || discov_changed) {
1988 /* In case this was disabled through mgmt */
1989 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1991 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1992 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1994 mgmt_new_settings(hdev);
1998 int hci_dev_cmd(unsigned int cmd, void __user *arg)
2000 struct hci_dev *hdev;
2001 struct hci_dev_req dr;
2004 if (copy_from_user(&dr, arg, sizeof(dr)))
2007 hdev = hci_dev_get(dr.dev_id);
2011 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
2016 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
2021 if (hdev->dev_type != HCI_PRIMARY) {
2026 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
2033 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2034 HCI_INIT_TIMEOUT, NULL);
2038 if (!lmp_encrypt_capable(hdev)) {
2043 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2044 /* Auth must be enabled first */
2045 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2046 HCI_INIT_TIMEOUT, NULL);
2051 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2052 HCI_INIT_TIMEOUT, NULL);
2056 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2057 HCI_INIT_TIMEOUT, NULL);
2059 /* Ensure that the connectable and discoverable states
2060 * get correctly modified as this was a non-mgmt change.
2063 hci_update_scan_state(hdev, dr.dev_opt);
2067 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2068 HCI_INIT_TIMEOUT, NULL);
2071 case HCISETLINKMODE:
2072 hdev->link_mode = ((__u16) dr.dev_opt) &
2073 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2077 if (hdev->pkt_type == (__u16) dr.dev_opt)
2080 hdev->pkt_type = (__u16) dr.dev_opt;
2081 mgmt_phy_configuration_changed(hdev, NULL);
2085 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2086 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2090 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2091 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2104 int hci_get_dev_list(void __user *arg)
2106 struct hci_dev *hdev;
2107 struct hci_dev_list_req *dl;
2108 struct hci_dev_req *dr;
2109 int n = 0, size, err;
2112 if (get_user(dev_num, (__u16 __user *) arg))
2115 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2118 size = sizeof(*dl) + dev_num * sizeof(*dr);
2120 dl = kzalloc(size, GFP_KERNEL);
2126 read_lock(&hci_dev_list_lock);
2127 list_for_each_entry(hdev, &hci_dev_list, list) {
2128 unsigned long flags = hdev->flags;
2130 /* When the auto-off is configured it means the transport
2131 * is running, but in that case still indicate that the
2132 * device is actually down.
2134 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2135 flags &= ~BIT(HCI_UP);
2137 (dr + n)->dev_id = hdev->id;
2138 (dr + n)->dev_opt = flags;
2143 read_unlock(&hci_dev_list_lock);
2146 size = sizeof(*dl) + n * sizeof(*dr);
2148 err = copy_to_user(arg, dl, size);
2151 return err ? -EFAULT : 0;
2154 int hci_get_dev_info(void __user *arg)
2156 struct hci_dev *hdev;
2157 struct hci_dev_info di;
2158 unsigned long flags;
2161 if (copy_from_user(&di, arg, sizeof(di)))
2164 hdev = hci_dev_get(di.dev_id);
2168 /* When the auto-off is configured it means the transport
2169 * is running, but in that case still indicate that the
2170 * device is actually down.
2172 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2173 flags = hdev->flags & ~BIT(HCI_UP);
2175 flags = hdev->flags;
2177 strcpy(di.name, hdev->name);
2178 di.bdaddr = hdev->bdaddr;
2179 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2181 di.pkt_type = hdev->pkt_type;
2182 if (lmp_bredr_capable(hdev)) {
2183 di.acl_mtu = hdev->acl_mtu;
2184 di.acl_pkts = hdev->acl_pkts;
2185 di.sco_mtu = hdev->sco_mtu;
2186 di.sco_pkts = hdev->sco_pkts;
2188 di.acl_mtu = hdev->le_mtu;
2189 di.acl_pkts = hdev->le_pkts;
2193 di.link_policy = hdev->link_policy;
2194 di.link_mode = hdev->link_mode;
2196 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2197 memcpy(&di.features, &hdev->features, sizeof(di.features));
2199 if (copy_to_user(arg, &di, sizeof(di)))
2207 /* ---- Interface to HCI drivers ---- */
2209 static int hci_rfkill_set_block(void *data, bool blocked)
2211 struct hci_dev *hdev = data;
2213 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2215 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2219 hci_dev_set_flag(hdev, HCI_RFKILLED);
2220 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2221 !hci_dev_test_flag(hdev, HCI_CONFIG))
2222 hci_dev_do_close(hdev);
2224 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2230 static const struct rfkill_ops hci_rfkill_ops = {
2231 .set_block = hci_rfkill_set_block,
2234 static void hci_power_on(struct work_struct *work)
2236 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2239 BT_DBG("%s", hdev->name);
2241 if (test_bit(HCI_UP, &hdev->flags) &&
2242 hci_dev_test_flag(hdev, HCI_MGMT) &&
2243 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2244 cancel_delayed_work(&hdev->power_off);
2245 hci_req_sync_lock(hdev);
2246 err = __hci_req_hci_power_on(hdev);
2247 hci_req_sync_unlock(hdev);
2248 mgmt_power_on(hdev, err);
2252 err = hci_dev_do_open(hdev);
2255 mgmt_set_powered_failed(hdev, err);
2256 hci_dev_unlock(hdev);
2260 /* During the HCI setup phase, a few error conditions are
2261 * ignored and they need to be checked now. If they are still
2262 * valid, it is important to turn the device back off.
2264 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2265 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2266 (hdev->dev_type == HCI_PRIMARY &&
2267 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2268 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2269 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2270 hci_dev_do_close(hdev);
2271 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2272 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2273 HCI_AUTO_OFF_TIMEOUT);
2276 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2277 /* For unconfigured devices, set the HCI_RAW flag
2278 * so that userspace can easily identify them.
2280 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2281 set_bit(HCI_RAW, &hdev->flags);
2283 /* For fully configured devices, this will send
2284 * the Index Added event. For unconfigured devices,
2285 * it will send Unconfigued Index Added event.
2287 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2288 * and no event will be send.
2290 mgmt_index_added(hdev);
2291 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2292 /* When the controller is now configured, then it
2293 * is important to clear the HCI_RAW flag.
2295 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2296 clear_bit(HCI_RAW, &hdev->flags);
2298 /* Powering on the controller with HCI_CONFIG set only
2299 * happens with the transition from unconfigured to
2300 * configured. This will send the Index Added event.
2302 mgmt_index_added(hdev);
2306 static void hci_power_off(struct work_struct *work)
2308 struct hci_dev *hdev = container_of(work, struct hci_dev,
2311 BT_DBG("%s", hdev->name);
2313 hci_dev_do_close(hdev);
2316 static void hci_error_reset(struct work_struct *work)
2318 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2320 BT_DBG("%s", hdev->name);
2323 hdev->hw_error(hdev, hdev->hw_error_code);
2325 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2327 if (hci_dev_do_close(hdev))
2330 hci_dev_do_open(hdev);
2333 void hci_uuids_clear(struct hci_dev *hdev)
2335 struct bt_uuid *uuid, *tmp;
2337 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2338 list_del(&uuid->list);
2343 void hci_link_keys_clear(struct hci_dev *hdev)
2345 struct link_key *key;
2347 list_for_each_entry(key, &hdev->link_keys, list) {
2348 list_del_rcu(&key->list);
2349 kfree_rcu(key, rcu);
2353 void hci_smp_ltks_clear(struct hci_dev *hdev)
2357 list_for_each_entry(k, &hdev->long_term_keys, list) {
2358 list_del_rcu(&k->list);
2363 void hci_smp_irks_clear(struct hci_dev *hdev)
2367 list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
2368 list_del_rcu(&k->list);
2373 void hci_blocked_keys_clear(struct hci_dev *hdev)
2375 struct blocked_key *b;
2377 list_for_each_entry(b, &hdev->blocked_keys, list) {
2378 list_del_rcu(&b->list);
2383 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
2385 bool blocked = false;
2386 struct blocked_key *b;
2389 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
2390 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
2400 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2405 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2406 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2409 if (hci_is_blocked_key(hdev,
2410 HCI_BLOCKED_KEY_TYPE_LINKKEY,
2412 bt_dev_warn_ratelimited(hdev,
2413 "Link key blocked for %pMR",
2426 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2427 u8 key_type, u8 old_key_type)
2430 if (key_type < 0x03)
2433 /* Debug keys are insecure so don't store them persistently */
2434 if (key_type == HCI_LK_DEBUG_COMBINATION)
2437 /* Changed combination key and there's no previous one */
2438 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2441 /* Security mode 3 case */
2445 /* BR/EDR key derived using SC from an LE link */
2446 if (conn->type == LE_LINK)
2449 /* Neither local nor remote side had no-bonding as requirement */
2450 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2453 /* Local side had dedicated bonding as requirement */
2454 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2457 /* Remote side had dedicated bonding as requirement */
2458 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2461 /* If none of the above criteria match, then don't store the key
2466 static u8 ltk_role(u8 type)
2468 if (type == SMP_LTK)
2469 return HCI_ROLE_MASTER;
2471 return HCI_ROLE_SLAVE;
2474 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2475 u8 addr_type, u8 role)
2480 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2481 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2484 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2487 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
2489 bt_dev_warn_ratelimited(hdev,
2490 "LTK blocked for %pMR",
2503 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2505 struct smp_irk *irk_to_return = NULL;
2506 struct smp_irk *irk;
2509 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2510 if (!bacmp(&irk->rpa, rpa)) {
2511 irk_to_return = irk;
2516 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2517 if (smp_irk_matches(hdev, irk->val, rpa)) {
2518 bacpy(&irk->rpa, rpa);
2519 irk_to_return = irk;
2525 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2526 irk_to_return->val)) {
2527 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2528 &irk_to_return->bdaddr);
2529 irk_to_return = NULL;
2534 return irk_to_return;
2537 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2540 struct smp_irk *irk_to_return = NULL;
2541 struct smp_irk *irk;
2543 /* Identity Address must be public or static random */
2544 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2548 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2549 if (addr_type == irk->addr_type &&
2550 bacmp(bdaddr, &irk->bdaddr) == 0) {
2551 irk_to_return = irk;
2558 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2559 irk_to_return->val)) {
2560 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2561 &irk_to_return->bdaddr);
2562 irk_to_return = NULL;
2567 return irk_to_return;
2570 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2571 bdaddr_t *bdaddr, u8 *val, u8 type,
2572 u8 pin_len, bool *persistent)
2574 struct link_key *key, *old_key;
2577 old_key = hci_find_link_key(hdev, bdaddr);
2579 old_key_type = old_key->type;
2582 old_key_type = conn ? conn->key_type : 0xff;
2583 key = kzalloc(sizeof(*key), GFP_KERNEL);
2586 list_add_rcu(&key->list, &hdev->link_keys);
2589 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2591 /* Some buggy controller combinations generate a changed
2592 * combination key for legacy pairing even when there's no
2594 if (type == HCI_LK_CHANGED_COMBINATION &&
2595 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2596 type = HCI_LK_COMBINATION;
2598 conn->key_type = type;
2601 bacpy(&key->bdaddr, bdaddr);
2602 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2603 key->pin_len = pin_len;
2605 if (type == HCI_LK_CHANGED_COMBINATION)
2606 key->type = old_key_type;
2611 *persistent = hci_persistent_key(hdev, conn, type,
2617 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2618 u8 addr_type, u8 type, u8 authenticated,
2619 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2621 struct smp_ltk *key, *old_key;
2622 u8 role = ltk_role(type);
2624 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2628 key = kzalloc(sizeof(*key), GFP_KERNEL);
2631 list_add_rcu(&key->list, &hdev->long_term_keys);
2634 bacpy(&key->bdaddr, bdaddr);
2635 key->bdaddr_type = addr_type;
2636 memcpy(key->val, tk, sizeof(key->val));
2637 key->authenticated = authenticated;
2640 key->enc_size = enc_size;
2646 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2647 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2649 struct smp_irk *irk;
2651 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2653 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2657 bacpy(&irk->bdaddr, bdaddr);
2658 irk->addr_type = addr_type;
2660 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2663 memcpy(irk->val, val, 16);
2664 bacpy(&irk->rpa, rpa);
2669 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2671 struct link_key *key;
2673 key = hci_find_link_key(hdev, bdaddr);
2677 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2679 list_del_rcu(&key->list);
2680 kfree_rcu(key, rcu);
2685 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2690 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2691 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2694 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2696 list_del_rcu(&k->list);
2701 return removed ? 0 : -ENOENT;
2704 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2708 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2709 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2712 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2714 list_del_rcu(&k->list);
2719 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2722 struct smp_irk *irk;
2725 if (type == BDADDR_BREDR) {
2726 if (hci_find_link_key(hdev, bdaddr))
2731 /* Convert to HCI addr type which struct smp_ltk uses */
2732 if (type == BDADDR_LE_PUBLIC)
2733 addr_type = ADDR_LE_DEV_PUBLIC;
2735 addr_type = ADDR_LE_DEV_RANDOM;
2737 irk = hci_get_irk(hdev, bdaddr, addr_type);
2739 bdaddr = &irk->bdaddr;
2740 addr_type = irk->addr_type;
2744 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2745 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2755 /* HCI command timer function */
2756 static void hci_cmd_timeout(struct work_struct *work)
2758 struct hci_dev *hdev = container_of(work, struct hci_dev,
2761 if (hdev->sent_cmd) {
2762 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2763 u16 opcode = __le16_to_cpu(sent->opcode);
2765 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2767 bt_dev_err(hdev, "command tx timeout");
2770 if (hdev->cmd_timeout)
2771 hdev->cmd_timeout(hdev);
2773 atomic_set(&hdev->cmd_cnt, 1);
2774 queue_work(hdev->workqueue, &hdev->cmd_work);
2777 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2778 bdaddr_t *bdaddr, u8 bdaddr_type)
2780 struct oob_data *data;
2782 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2783 if (bacmp(bdaddr, &data->bdaddr) != 0)
2785 if (data->bdaddr_type != bdaddr_type)
2793 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2796 struct oob_data *data;
2798 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2802 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2804 list_del(&data->list);
2810 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2812 struct oob_data *data, *n;
2814 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2815 list_del(&data->list);
2820 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2821 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2822 u8 *hash256, u8 *rand256)
2824 struct oob_data *data;
2826 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2828 data = kmalloc(sizeof(*data), GFP_KERNEL);
2832 bacpy(&data->bdaddr, bdaddr);
2833 data->bdaddr_type = bdaddr_type;
2834 list_add(&data->list, &hdev->remote_oob_data);
2837 if (hash192 && rand192) {
2838 memcpy(data->hash192, hash192, sizeof(data->hash192));
2839 memcpy(data->rand192, rand192, sizeof(data->rand192));
2840 if (hash256 && rand256)
2841 data->present = 0x03;
2843 memset(data->hash192, 0, sizeof(data->hash192));
2844 memset(data->rand192, 0, sizeof(data->rand192));
2845 if (hash256 && rand256)
2846 data->present = 0x02;
2848 data->present = 0x00;
2851 if (hash256 && rand256) {
2852 memcpy(data->hash256, hash256, sizeof(data->hash256));
2853 memcpy(data->rand256, rand256, sizeof(data->rand256));
2855 memset(data->hash256, 0, sizeof(data->hash256));
2856 memset(data->rand256, 0, sizeof(data->rand256));
2857 if (hash192 && rand192)
2858 data->present = 0x01;
2861 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2866 /* This function requires the caller holds hdev->lock */
2867 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2869 struct adv_info *adv_instance;
2871 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2872 if (adv_instance->instance == instance)
2873 return adv_instance;
2879 /* This function requires the caller holds hdev->lock */
2880 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2882 struct adv_info *cur_instance;
2884 cur_instance = hci_find_adv_instance(hdev, instance);
2888 if (cur_instance == list_last_entry(&hdev->adv_instances,
2889 struct adv_info, list))
2890 return list_first_entry(&hdev->adv_instances,
2891 struct adv_info, list);
2893 return list_next_entry(cur_instance, list);
2896 /* This function requires the caller holds hdev->lock */
2897 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2899 struct adv_info *adv_instance;
2901 adv_instance = hci_find_adv_instance(hdev, instance);
2905 BT_DBG("%s removing %dMR", hdev->name, instance);
2907 if (hdev->cur_adv_instance == instance) {
2908 if (hdev->adv_instance_timeout) {
2909 cancel_delayed_work(&hdev->adv_instance_expire);
2910 hdev->adv_instance_timeout = 0;
2912 hdev->cur_adv_instance = 0x00;
2915 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2917 list_del(&adv_instance->list);
2918 kfree(adv_instance);
2920 hdev->adv_instance_cnt--;
2925 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
2927 struct adv_info *adv_instance, *n;
2929 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
2930 adv_instance->rpa_expired = rpa_expired;
2933 /* This function requires the caller holds hdev->lock */
2934 void hci_adv_instances_clear(struct hci_dev *hdev)
2936 struct adv_info *adv_instance, *n;
2938 if (hdev->adv_instance_timeout) {
2939 cancel_delayed_work(&hdev->adv_instance_expire);
2940 hdev->adv_instance_timeout = 0;
2943 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2944 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2945 list_del(&adv_instance->list);
2946 kfree(adv_instance);
2949 hdev->adv_instance_cnt = 0;
2950 hdev->cur_adv_instance = 0x00;
2953 static void adv_instance_rpa_expired(struct work_struct *work)
2955 struct adv_info *adv_instance = container_of(work, struct adv_info,
2956 rpa_expired_cb.work);
2960 adv_instance->rpa_expired = true;
2963 /* This function requires the caller holds hdev->lock */
2964 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2965 u16 adv_data_len, u8 *adv_data,
2966 u16 scan_rsp_len, u8 *scan_rsp_data,
2967 u16 timeout, u16 duration)
2969 struct adv_info *adv_instance;
2971 adv_instance = hci_find_adv_instance(hdev, instance);
2973 memset(adv_instance->adv_data, 0,
2974 sizeof(adv_instance->adv_data));
2975 memset(adv_instance->scan_rsp_data, 0,
2976 sizeof(adv_instance->scan_rsp_data));
2978 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
2979 instance < 1 || instance > hdev->le_num_of_adv_sets)
2982 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2986 adv_instance->pending = true;
2987 adv_instance->instance = instance;
2988 list_add(&adv_instance->list, &hdev->adv_instances);
2989 hdev->adv_instance_cnt++;
2992 adv_instance->flags = flags;
2993 adv_instance->adv_data_len = adv_data_len;
2994 adv_instance->scan_rsp_len = scan_rsp_len;
2997 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
3000 memcpy(adv_instance->scan_rsp_data,
3001 scan_rsp_data, scan_rsp_len);
3003 adv_instance->timeout = timeout;
3004 adv_instance->remaining_time = timeout;
3007 adv_instance->duration = hdev->def_multi_adv_rotation_duration;
3009 adv_instance->duration = duration;
3011 adv_instance->tx_power = HCI_TX_POWER_INVALID;
3013 INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
3014 adv_instance_rpa_expired);
3016 BT_DBG("%s for %dMR", hdev->name, instance);
3021 /* This function requires the caller holds hdev->lock */
3022 void hci_adv_monitors_clear(struct hci_dev *hdev)
3024 struct adv_monitor *monitor;
3027 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
3028 hci_free_adv_monitor(monitor);
3030 idr_destroy(&hdev->adv_monitors_idr);
3033 void hci_free_adv_monitor(struct adv_monitor *monitor)
3035 struct adv_pattern *pattern;
3036 struct adv_pattern *tmp;
3041 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list)
3047 /* This function requires the caller holds hdev->lock */
3048 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
3050 int min, max, handle;
3055 min = HCI_MIN_ADV_MONITOR_HANDLE;
3056 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
3057 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
3062 hdev->adv_monitors_cnt++;
3063 monitor->handle = handle;
3065 hci_update_background_scan(hdev);
3070 static int free_adv_monitor(int id, void *ptr, void *data)
3072 struct hci_dev *hdev = data;
3073 struct adv_monitor *monitor = ptr;
3075 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
3076 hci_free_adv_monitor(monitor);
3077 hdev->adv_monitors_cnt--;
3082 /* This function requires the caller holds hdev->lock */
3083 int hci_remove_adv_monitor(struct hci_dev *hdev, u16 handle)
3085 struct adv_monitor *monitor;
3088 monitor = idr_find(&hdev->adv_monitors_idr, handle);
3092 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
3093 hci_free_adv_monitor(monitor);
3094 hdev->adv_monitors_cnt--;
3096 /* Remove all monitors if handle is 0. */
3097 idr_for_each(&hdev->adv_monitors_idr, &free_adv_monitor, hdev);
3100 hci_update_background_scan(hdev);
3105 /* This function requires the caller holds hdev->lock */
3106 bool hci_is_adv_monitoring(struct hci_dev *hdev)
3108 return !idr_is_empty(&hdev->adv_monitors_idr);
3111 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
3112 bdaddr_t *bdaddr, u8 type)
3114 struct bdaddr_list *b;
3116 list_for_each_entry(b, bdaddr_list, list) {
3117 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3124 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
3125 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
3128 struct bdaddr_list_with_irk *b;
3130 list_for_each_entry(b, bdaddr_list, list) {
3131 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3138 struct bdaddr_list_with_flags *
3139 hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
3140 bdaddr_t *bdaddr, u8 type)
3142 struct bdaddr_list_with_flags *b;
3144 list_for_each_entry(b, bdaddr_list, list) {
3145 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3152 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
3154 struct bdaddr_list *b, *n;
3156 list_for_each_entry_safe(b, n, bdaddr_list, list) {
3162 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3164 struct bdaddr_list *entry;
3166 if (!bacmp(bdaddr, BDADDR_ANY))
3169 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3172 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3176 bacpy(&entry->bdaddr, bdaddr);
3177 entry->bdaddr_type = type;
3179 list_add(&entry->list, list);
3184 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3185 u8 type, u8 *peer_irk, u8 *local_irk)
3187 struct bdaddr_list_with_irk *entry;
3189 if (!bacmp(bdaddr, BDADDR_ANY))
3192 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3195 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3199 bacpy(&entry->bdaddr, bdaddr);
3200 entry->bdaddr_type = type;
3203 memcpy(entry->peer_irk, peer_irk, 16);
3206 memcpy(entry->local_irk, local_irk, 16);
3208 list_add(&entry->list, list);
3213 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
3216 struct bdaddr_list_with_flags *entry;
3218 if (!bacmp(bdaddr, BDADDR_ANY))
3221 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3224 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3228 bacpy(&entry->bdaddr, bdaddr);
3229 entry->bdaddr_type = type;
3230 entry->current_flags = flags;
3232 list_add(&entry->list, list);
3237 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3239 struct bdaddr_list *entry;
3241 if (!bacmp(bdaddr, BDADDR_ANY)) {
3242 hci_bdaddr_list_clear(list);
3246 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
3250 list_del(&entry->list);
3256 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3259 struct bdaddr_list_with_irk *entry;
3261 if (!bacmp(bdaddr, BDADDR_ANY)) {
3262 hci_bdaddr_list_clear(list);
3266 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
3270 list_del(&entry->list);
3276 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
3279 struct bdaddr_list_with_flags *entry;
3281 if (!bacmp(bdaddr, BDADDR_ANY)) {
3282 hci_bdaddr_list_clear(list);
3286 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
3290 list_del(&entry->list);
3296 /* This function requires the caller holds hdev->lock */
3297 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3298 bdaddr_t *addr, u8 addr_type)
3300 struct hci_conn_params *params;
3302 list_for_each_entry(params, &hdev->le_conn_params, list) {
3303 if (bacmp(¶ms->addr, addr) == 0 &&
3304 params->addr_type == addr_type) {
3312 /* This function requires the caller holds hdev->lock */
3313 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3314 bdaddr_t *addr, u8 addr_type)
3316 struct hci_conn_params *param;
3318 switch (addr_type) {
3319 case ADDR_LE_DEV_PUBLIC_RESOLVED:
3320 addr_type = ADDR_LE_DEV_PUBLIC;
3322 case ADDR_LE_DEV_RANDOM_RESOLVED:
3323 addr_type = ADDR_LE_DEV_RANDOM;
3327 list_for_each_entry(param, list, action) {
3328 if (bacmp(¶m->addr, addr) == 0 &&
3329 param->addr_type == addr_type)
3336 /* This function requires the caller holds hdev->lock */
3337 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3338 bdaddr_t *addr, u8 addr_type)
3340 struct hci_conn_params *params;
3342 params = hci_conn_params_lookup(hdev, addr, addr_type);
3346 params = kzalloc(sizeof(*params), GFP_KERNEL);
3348 bt_dev_err(hdev, "out of memory");
3352 bacpy(¶ms->addr, addr);
3353 params->addr_type = addr_type;
3355 list_add(¶ms->list, &hdev->le_conn_params);
3356 INIT_LIST_HEAD(¶ms->action);
3358 params->conn_min_interval = hdev->le_conn_min_interval;
3359 params->conn_max_interval = hdev->le_conn_max_interval;
3360 params->conn_latency = hdev->le_conn_latency;
3361 params->supervision_timeout = hdev->le_supv_timeout;
3362 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3364 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3369 static void hci_conn_params_free(struct hci_conn_params *params)
3372 hci_conn_drop(params->conn);
3373 hci_conn_put(params->conn);
3376 list_del(¶ms->action);
3377 list_del(¶ms->list);
3381 /* This function requires the caller holds hdev->lock */
3382 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3384 struct hci_conn_params *params;
3386 params = hci_conn_params_lookup(hdev, addr, addr_type);
3390 hci_conn_params_free(params);
3392 hci_update_background_scan(hdev);
3394 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3397 /* This function requires the caller holds hdev->lock */
3398 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3400 struct hci_conn_params *params, *tmp;
3402 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3403 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3406 /* If trying to estabilish one time connection to disabled
3407 * device, leave the params, but mark them as just once.
3409 if (params->explicit_connect) {
3410 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
3414 list_del(¶ms->list);
3418 BT_DBG("All LE disabled connection parameters were removed");
3421 /* This function requires the caller holds hdev->lock */
3422 static void hci_conn_params_clear_all(struct hci_dev *hdev)
3424 struct hci_conn_params *params, *tmp;
3426 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3427 hci_conn_params_free(params);
3429 BT_DBG("All LE connection parameters were removed");
3432 /* Copy the Identity Address of the controller.
3434 * If the controller has a public BD_ADDR, then by default use that one.
3435 * If this is a LE only controller without a public address, default to
3436 * the static random address.
3438 * For debugging purposes it is possible to force controllers with a
3439 * public address to use the static random address instead.
3441 * In case BR/EDR has been disabled on a dual-mode controller and
3442 * userspace has configured a static address, then that address
3443 * becomes the identity address instead of the public BR/EDR address.
3445 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3448 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3449 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3450 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3451 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3452 bacpy(bdaddr, &hdev->static_addr);
3453 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3455 bacpy(bdaddr, &hdev->bdaddr);
3456 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3460 static void hci_suspend_clear_tasks(struct hci_dev *hdev)
3464 for (i = 0; i < __SUSPEND_NUM_TASKS; i++)
3465 clear_bit(i, hdev->suspend_tasks);
3467 wake_up(&hdev->suspend_wait_q);
3470 static int hci_suspend_wait_event(struct hci_dev *hdev)
3473 (find_first_bit(hdev->suspend_tasks, __SUSPEND_NUM_TASKS) == \
3474 __SUSPEND_NUM_TASKS)
3477 int ret = wait_event_timeout(hdev->suspend_wait_q,
3478 WAKE_COND, SUSPEND_NOTIFIER_TIMEOUT);
3481 bt_dev_err(hdev, "Timed out waiting for suspend events");
3482 for (i = 0; i < __SUSPEND_NUM_TASKS; ++i) {
3483 if (test_bit(i, hdev->suspend_tasks))
3484 bt_dev_err(hdev, "Suspend timeout bit: %d", i);
3485 clear_bit(i, hdev->suspend_tasks);
3496 static void hci_prepare_suspend(struct work_struct *work)
3498 struct hci_dev *hdev =
3499 container_of(work, struct hci_dev, suspend_prepare);
3502 hci_req_prepare_suspend(hdev, hdev->suspend_state_next);
3503 hci_dev_unlock(hdev);
3506 static int hci_change_suspend_state(struct hci_dev *hdev,
3507 enum suspended_state next)
3509 hdev->suspend_state_next = next;
3510 set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
3511 queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
3512 return hci_suspend_wait_event(hdev);
3515 static void hci_clear_wake_reason(struct hci_dev *hdev)
3519 hdev->wake_reason = 0;
3520 bacpy(&hdev->wake_addr, BDADDR_ANY);
3521 hdev->wake_addr_type = 0;
3523 hci_dev_unlock(hdev);
3526 static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
3529 struct hci_dev *hdev =
3530 container_of(nb, struct hci_dev, suspend_notifier);
3532 u8 state = BT_RUNNING;
3534 /* If powering down, wait for completion. */
3535 if (mgmt_powering_down(hdev)) {
3536 set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks);
3537 ret = hci_suspend_wait_event(hdev);
3542 /* Suspend notifier should only act on events when powered. */
3543 if (!hdev_is_powered(hdev) ||
3544 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3547 if (action == PM_SUSPEND_PREPARE) {
3548 /* Suspend consists of two actions:
3549 * - First, disconnect everything and make the controller not
3550 * connectable (disabling scanning)
3551 * - Second, program event filter/accept list and enable scan
3553 ret = hci_change_suspend_state(hdev, BT_SUSPEND_DISCONNECT);
3555 state = BT_SUSPEND_DISCONNECT;
3557 /* Only configure accept list if disconnect succeeded and wake
3558 * isn't being prevented.
3560 if (!ret && !(hdev->prevent_wake && hdev->prevent_wake(hdev))) {
3561 ret = hci_change_suspend_state(hdev,
3562 BT_SUSPEND_CONFIGURE_WAKE);
3564 state = BT_SUSPEND_CONFIGURE_WAKE;
3567 hci_clear_wake_reason(hdev);
3568 mgmt_suspending(hdev, state);
3570 } else if (action == PM_POST_SUSPEND) {
3571 ret = hci_change_suspend_state(hdev, BT_RUNNING);
3573 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
3574 hdev->wake_addr_type);
3578 /* We always allow suspend even if suspend preparation failed and
3579 * attempt to recover in resume.
3582 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
3588 /* Alloc HCI device */
3589 struct hci_dev *hci_alloc_dev(void)
3591 struct hci_dev *hdev;
3593 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3597 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3598 hdev->esco_type = (ESCO_HV1);
3599 hdev->link_mode = (HCI_LM_ACCEPT);
3600 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3601 hdev->io_capability = 0x03; /* No Input No Output */
3602 hdev->manufacturer = 0xffff; /* Default to internal use */
3603 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3604 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3605 hdev->adv_instance_cnt = 0;
3606 hdev->cur_adv_instance = 0x00;
3607 hdev->adv_instance_timeout = 0;
3609 hdev->advmon_allowlist_duration = 300;
3610 hdev->advmon_no_filter_duration = 500;
3612 hdev->sniff_max_interval = 800;
3613 hdev->sniff_min_interval = 80;
3615 hdev->le_adv_channel_map = 0x07;
3616 hdev->le_adv_min_interval = 0x0800;
3617 hdev->le_adv_max_interval = 0x0800;
3618 hdev->le_scan_interval = 0x0060;
3619 hdev->le_scan_window = 0x0030;
3620 hdev->le_scan_int_suspend = 0x0400;
3621 hdev->le_scan_window_suspend = 0x0012;
3622 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
3623 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
3624 hdev->le_scan_int_connect = 0x0060;
3625 hdev->le_scan_window_connect = 0x0060;
3626 hdev->le_conn_min_interval = 0x0018;
3627 hdev->le_conn_max_interval = 0x0028;
3628 hdev->le_conn_latency = 0x0000;
3629 hdev->le_supv_timeout = 0x002a;
3630 hdev->le_def_tx_len = 0x001b;
3631 hdev->le_def_tx_time = 0x0148;
3632 hdev->le_max_tx_len = 0x001b;
3633 hdev->le_max_tx_time = 0x0148;
3634 hdev->le_max_rx_len = 0x001b;
3635 hdev->le_max_rx_time = 0x0148;
3636 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
3637 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3638 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
3639 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3640 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
3641 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
3642 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
3644 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3645 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3646 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3647 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3648 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
3649 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
3651 /* default 1.28 sec page scan */
3652 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
3653 hdev->def_page_scan_int = 0x0800;
3654 hdev->def_page_scan_window = 0x0012;
3656 mutex_init(&hdev->lock);
3657 mutex_init(&hdev->req_lock);
3659 INIT_LIST_HEAD(&hdev->mgmt_pending);
3660 INIT_LIST_HEAD(&hdev->reject_list);
3661 INIT_LIST_HEAD(&hdev->accept_list);
3662 INIT_LIST_HEAD(&hdev->uuids);
3663 INIT_LIST_HEAD(&hdev->link_keys);
3664 INIT_LIST_HEAD(&hdev->long_term_keys);
3665 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3666 INIT_LIST_HEAD(&hdev->remote_oob_data);
3667 INIT_LIST_HEAD(&hdev->le_accept_list);
3668 INIT_LIST_HEAD(&hdev->le_resolv_list);
3669 INIT_LIST_HEAD(&hdev->le_conn_params);
3670 INIT_LIST_HEAD(&hdev->pend_le_conns);
3671 INIT_LIST_HEAD(&hdev->pend_le_reports);
3672 INIT_LIST_HEAD(&hdev->conn_hash.list);
3673 INIT_LIST_HEAD(&hdev->adv_instances);
3674 INIT_LIST_HEAD(&hdev->blocked_keys);
3676 INIT_WORK(&hdev->rx_work, hci_rx_work);
3677 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3678 INIT_WORK(&hdev->tx_work, hci_tx_work);
3679 INIT_WORK(&hdev->power_on, hci_power_on);
3680 INIT_WORK(&hdev->error_reset, hci_error_reset);
3681 INIT_WORK(&hdev->suspend_prepare, hci_prepare_suspend);
3683 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3685 skb_queue_head_init(&hdev->rx_q);
3686 skb_queue_head_init(&hdev->cmd_q);
3687 skb_queue_head_init(&hdev->raw_q);
3689 init_waitqueue_head(&hdev->req_wait_q);
3690 init_waitqueue_head(&hdev->suspend_wait_q);
3692 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3694 hci_request_setup(hdev);
3696 hci_init_sysfs(hdev);
3697 discovery_init(hdev);
3701 EXPORT_SYMBOL(hci_alloc_dev);
3703 /* Free HCI device */
3704 void hci_free_dev(struct hci_dev *hdev)
3706 /* will free via device release */
3707 put_device(&hdev->dev);
3709 EXPORT_SYMBOL(hci_free_dev);
3711 /* Register HCI device */
3712 int hci_register_dev(struct hci_dev *hdev)
3716 if (!hdev->open || !hdev->close || !hdev->send)
3719 /* Do not allow HCI_AMP devices to register at index 0,
3720 * so the index can be used as the AMP controller ID.
3722 switch (hdev->dev_type) {
3724 id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL);
3727 id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL);
3736 snprintf(hdev->name, sizeof(hdev->name), "hci%d", id);
3739 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3741 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3742 if (!hdev->workqueue) {
3747 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3749 if (!hdev->req_workqueue) {
3750 destroy_workqueue(hdev->workqueue);
3755 if (!IS_ERR_OR_NULL(bt_debugfs))
3756 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3758 dev_set_name(&hdev->dev, "%s", hdev->name);
3760 error = device_add(&hdev->dev);
3764 hci_leds_init(hdev);
3766 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3767 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3770 if (rfkill_register(hdev->rfkill) < 0) {
3771 rfkill_destroy(hdev->rfkill);
3772 hdev->rfkill = NULL;
3776 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3777 hci_dev_set_flag(hdev, HCI_RFKILLED);
3779 hci_dev_set_flag(hdev, HCI_SETUP);
3780 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3782 if (hdev->dev_type == HCI_PRIMARY) {
3783 /* Assume BR/EDR support until proven otherwise (such as
3784 * through reading supported features during init.
3786 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3789 write_lock(&hci_dev_list_lock);
3790 list_add(&hdev->list, &hci_dev_list);
3791 write_unlock(&hci_dev_list_lock);
3793 /* Devices that are marked for raw-only usage are unconfigured
3794 * and should not be included in normal operation.
3796 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3797 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3799 hci_sock_dev_event(hdev, HCI_DEV_REG);
3802 if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
3803 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
3804 error = register_pm_notifier(&hdev->suspend_notifier);
3809 queue_work(hdev->req_workqueue, &hdev->power_on);
3811 idr_init(&hdev->adv_monitors_idr);
3816 debugfs_remove_recursive(hdev->debugfs);
3817 destroy_workqueue(hdev->workqueue);
3818 destroy_workqueue(hdev->req_workqueue);
3820 ida_simple_remove(&hci_index_ida, hdev->id);
3824 EXPORT_SYMBOL(hci_register_dev);
3826 /* Unregister HCI device */
3827 void hci_unregister_dev(struct hci_dev *hdev)
3829 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3831 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3833 write_lock(&hci_dev_list_lock);
3834 list_del(&hdev->list);
3835 write_unlock(&hci_dev_list_lock);
3837 cancel_work_sync(&hdev->power_on);
3839 if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
3840 hci_suspend_clear_tasks(hdev);
3841 unregister_pm_notifier(&hdev->suspend_notifier);
3842 cancel_work_sync(&hdev->suspend_prepare);
3845 hci_dev_do_close(hdev);
3847 if (!test_bit(HCI_INIT, &hdev->flags) &&
3848 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3849 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3851 mgmt_index_removed(hdev);
3852 hci_dev_unlock(hdev);
3855 /* mgmt_index_removed should take care of emptying the
3857 BUG_ON(!list_empty(&hdev->mgmt_pending));
3859 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
3862 rfkill_unregister(hdev->rfkill);
3863 rfkill_destroy(hdev->rfkill);
3866 device_del(&hdev->dev);
3867 /* Actual cleanup is deferred until hci_cleanup_dev(). */
3870 EXPORT_SYMBOL(hci_unregister_dev);
3872 /* Cleanup HCI device */
3873 void hci_cleanup_dev(struct hci_dev *hdev)
3875 debugfs_remove_recursive(hdev->debugfs);
3876 kfree_const(hdev->hw_info);
3877 kfree_const(hdev->fw_info);
3879 destroy_workqueue(hdev->workqueue);
3880 destroy_workqueue(hdev->req_workqueue);
3883 hci_bdaddr_list_clear(&hdev->reject_list);
3884 hci_bdaddr_list_clear(&hdev->accept_list);
3885 hci_uuids_clear(hdev);
3886 hci_link_keys_clear(hdev);
3887 hci_smp_ltks_clear(hdev);
3888 hci_smp_irks_clear(hdev);
3889 hci_remote_oob_data_clear(hdev);
3890 hci_adv_instances_clear(hdev);
3891 hci_adv_monitors_clear(hdev);
3892 hci_bdaddr_list_clear(&hdev->le_accept_list);
3893 hci_bdaddr_list_clear(&hdev->le_resolv_list);
3894 hci_conn_params_clear_all(hdev);
3895 hci_discovery_filter_clear(hdev);
3896 hci_blocked_keys_clear(hdev);
3897 hci_dev_unlock(hdev);
3899 ida_simple_remove(&hci_index_ida, hdev->id);
3902 /* Suspend HCI device */
3903 int hci_suspend_dev(struct hci_dev *hdev)
3905 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
3908 EXPORT_SYMBOL(hci_suspend_dev);
3910 /* Resume HCI device */
3911 int hci_resume_dev(struct hci_dev *hdev)
3913 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
3916 EXPORT_SYMBOL(hci_resume_dev);
3918 /* Reset HCI device */
3919 int hci_reset_dev(struct hci_dev *hdev)
3921 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3922 struct sk_buff *skb;
3924 skb = bt_skb_alloc(3, GFP_ATOMIC);
3928 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3929 skb_put_data(skb, hw_err, 3);
3931 /* Send Hardware Error to upper stack */
3932 return hci_recv_frame(hdev, skb);
3934 EXPORT_SYMBOL(hci_reset_dev);
3936 /* Receive frame from HCI drivers */
3937 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3939 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3940 && !test_bit(HCI_INIT, &hdev->flags))) {
3945 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
3946 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3947 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
3948 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
3954 bt_cb(skb)->incoming = 1;
3957 __net_timestamp(skb);
3959 skb_queue_tail(&hdev->rx_q, skb);
3960 queue_work(hdev->workqueue, &hdev->rx_work);
3964 EXPORT_SYMBOL(hci_recv_frame);
3966 /* Receive diagnostic message from HCI drivers */
3967 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
3969 /* Mark as diagnostic packet */
3970 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3973 __net_timestamp(skb);
3975 skb_queue_tail(&hdev->rx_q, skb);
3976 queue_work(hdev->workqueue, &hdev->rx_work);
3980 EXPORT_SYMBOL(hci_recv_diag);
3982 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
3986 va_start(vargs, fmt);
3987 kfree_const(hdev->hw_info);
3988 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
3991 EXPORT_SYMBOL(hci_set_hw_info);
3993 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
3997 va_start(vargs, fmt);
3998 kfree_const(hdev->fw_info);
3999 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
4002 EXPORT_SYMBOL(hci_set_fw_info);
4004 /* ---- Interface to upper protocols ---- */
4006 int hci_register_cb(struct hci_cb *cb)
4008 BT_DBG("%p name %s", cb, cb->name);
4010 mutex_lock(&hci_cb_list_lock);
4011 list_add_tail(&cb->list, &hci_cb_list);
4012 mutex_unlock(&hci_cb_list_lock);
4016 EXPORT_SYMBOL(hci_register_cb);
4018 int hci_unregister_cb(struct hci_cb *cb)
4020 BT_DBG("%p name %s", cb, cb->name);
4022 mutex_lock(&hci_cb_list_lock);
4023 list_del(&cb->list);
4024 mutex_unlock(&hci_cb_list_lock);
4028 EXPORT_SYMBOL(hci_unregister_cb);
4030 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
4034 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
4038 __net_timestamp(skb);
4040 /* Send copy to monitor */
4041 hci_send_to_monitor(hdev, skb);
4043 if (atomic_read(&hdev->promisc)) {
4044 /* Send copy to the sockets */
4045 hci_send_to_sock(hdev, skb);
4048 /* Get rid of skb owner, prior to sending to the driver. */
4051 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
4056 err = hdev->send(hdev, skb);
4058 bt_dev_err(hdev, "sending frame failed (%d)", err);
4063 /* Send HCI command */
4064 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
4067 struct sk_buff *skb;
4069 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4071 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4073 bt_dev_err(hdev, "no memory for command");
4077 /* Stand-alone HCI commands must be flagged as
4078 * single-command requests.
4080 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
4082 skb_queue_tail(&hdev->cmd_q, skb);
4083 queue_work(hdev->workqueue, &hdev->cmd_work);
4088 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
4091 struct sk_buff *skb;
4093 if (hci_opcode_ogf(opcode) != 0x3f) {
4094 /* A controller receiving a command shall respond with either
4095 * a Command Status Event or a Command Complete Event.
4096 * Therefore, all standard HCI commands must be sent via the
4097 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
4098 * Some vendors do not comply with this rule for vendor-specific
4099 * commands and do not return any event. We want to support
4100 * unresponded commands for such cases only.
4102 bt_dev_err(hdev, "unresponded command not supported");
4106 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4108 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
4113 hci_send_frame(hdev, skb);
4117 EXPORT_SYMBOL(__hci_cmd_send);
4119 /* Get data from the previously sent command */
4120 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
4122 struct hci_command_hdr *hdr;
4124 if (!hdev->sent_cmd)
4127 hdr = (void *) hdev->sent_cmd->data;
4129 if (hdr->opcode != cpu_to_le16(opcode))
4132 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
4134 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
4137 /* Send HCI command and wait for command commplete event */
4138 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
4139 const void *param, u32 timeout)
4141 struct sk_buff *skb;
4143 if (!test_bit(HCI_UP, &hdev->flags))
4144 return ERR_PTR(-ENETDOWN);
4146 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
4148 hci_req_sync_lock(hdev);
4149 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
4150 hci_req_sync_unlock(hdev);
4154 EXPORT_SYMBOL(hci_cmd_sync);
4157 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
4159 struct hci_acl_hdr *hdr;
4162 skb_push(skb, HCI_ACL_HDR_SIZE);
4163 skb_reset_transport_header(skb);
4164 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
4165 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
4166 hdr->dlen = cpu_to_le16(len);
4169 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
4170 struct sk_buff *skb, __u16 flags)
4172 struct hci_conn *conn = chan->conn;
4173 struct hci_dev *hdev = conn->hdev;
4174 struct sk_buff *list;
4176 skb->len = skb_headlen(skb);
4179 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
4181 switch (hdev->dev_type) {
4183 hci_add_acl_hdr(skb, conn->handle, flags);
4186 hci_add_acl_hdr(skb, chan->handle, flags);
4189 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
4193 list = skb_shinfo(skb)->frag_list;
4195 /* Non fragmented */
4196 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
4198 skb_queue_tail(queue, skb);
4201 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4203 skb_shinfo(skb)->frag_list = NULL;
4205 /* Queue all fragments atomically. We need to use spin_lock_bh
4206 * here because of 6LoWPAN links, as there this function is
4207 * called from softirq and using normal spin lock could cause
4210 spin_lock_bh(&queue->lock);
4212 __skb_queue_tail(queue, skb);
4214 flags &= ~ACL_START;
4217 skb = list; list = list->next;
4219 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
4220 hci_add_acl_hdr(skb, conn->handle, flags);
4222 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4224 __skb_queue_tail(queue, skb);
4227 spin_unlock_bh(&queue->lock);
4231 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
4233 struct hci_dev *hdev = chan->conn->hdev;
4235 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
4237 hci_queue_acl(chan, &chan->data_q, skb, flags);
4239 queue_work(hdev->workqueue, &hdev->tx_work);
4243 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
4245 struct hci_dev *hdev = conn->hdev;
4246 struct hci_sco_hdr hdr;
4248 BT_DBG("%s len %d", hdev->name, skb->len);
4250 hdr.handle = cpu_to_le16(conn->handle);
4251 hdr.dlen = skb->len;
4253 skb_push(skb, HCI_SCO_HDR_SIZE);
4254 skb_reset_transport_header(skb);
4255 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
4257 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
4259 skb_queue_tail(&conn->data_q, skb);
4260 queue_work(hdev->workqueue, &hdev->tx_work);
4263 /* ---- HCI TX task (outgoing data) ---- */
4265 /* HCI Connection scheduler */
4266 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4269 struct hci_conn_hash *h = &hdev->conn_hash;
4270 struct hci_conn *conn = NULL, *c;
4271 unsigned int num = 0, min = ~0;
4273 /* We don't have to lock device here. Connections are always
4274 * added and removed with TX task disabled. */
4278 list_for_each_entry_rcu(c, &h->list, list) {
4279 if (c->type != type || skb_queue_empty(&c->data_q))
4282 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4287 if (c->sent < min) {
4292 if (hci_conn_num(hdev, type) == num)
4301 switch (conn->type) {
4303 cnt = hdev->acl_cnt;
4307 cnt = hdev->sco_cnt;
4310 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4314 bt_dev_err(hdev, "unknown link type %d", conn->type);
4322 BT_DBG("conn %p quote %d", conn, *quote);
4326 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
4328 struct hci_conn_hash *h = &hdev->conn_hash;
4331 bt_dev_err(hdev, "link tx timeout");
4335 /* Kill stalled connections */
4336 list_for_each_entry_rcu(c, &h->list, list) {
4337 if (c->type == type && c->sent) {
4338 bt_dev_err(hdev, "killing stalled connection %pMR",
4340 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
4347 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4350 struct hci_conn_hash *h = &hdev->conn_hash;
4351 struct hci_chan *chan = NULL;
4352 unsigned int num = 0, min = ~0, cur_prio = 0;
4353 struct hci_conn *conn;
4354 int cnt, q, conn_num = 0;
4356 BT_DBG("%s", hdev->name);
4360 list_for_each_entry_rcu(conn, &h->list, list) {
4361 struct hci_chan *tmp;
4363 if (conn->type != type)
4366 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4371 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
4372 struct sk_buff *skb;
4374 if (skb_queue_empty(&tmp->data_q))
4377 skb = skb_peek(&tmp->data_q);
4378 if (skb->priority < cur_prio)
4381 if (skb->priority > cur_prio) {
4384 cur_prio = skb->priority;
4389 if (conn->sent < min) {
4395 if (hci_conn_num(hdev, type) == conn_num)
4404 switch (chan->conn->type) {
4406 cnt = hdev->acl_cnt;
4409 cnt = hdev->block_cnt;
4413 cnt = hdev->sco_cnt;
4416 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4420 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
4425 BT_DBG("chan %p quote %d", chan, *quote);
4429 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4431 struct hci_conn_hash *h = &hdev->conn_hash;
4432 struct hci_conn *conn;
4435 BT_DBG("%s", hdev->name);
4439 list_for_each_entry_rcu(conn, &h->list, list) {
4440 struct hci_chan *chan;
4442 if (conn->type != type)
4445 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4450 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4451 struct sk_buff *skb;
4458 if (skb_queue_empty(&chan->data_q))
4461 skb = skb_peek(&chan->data_q);
4462 if (skb->priority >= HCI_PRIO_MAX - 1)
4465 skb->priority = HCI_PRIO_MAX - 1;
4467 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
4471 if (hci_conn_num(hdev, type) == num)
4479 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4481 /* Calculate count of blocks used by this packet */
4482 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4485 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
4487 unsigned long last_tx;
4489 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
4494 last_tx = hdev->le_last_tx;
4497 last_tx = hdev->acl_last_tx;
4501 /* tx timeout must be longer than maximum link supervision timeout
4504 if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
4505 hci_link_tx_to(hdev, type);
4509 static void hci_sched_sco(struct hci_dev *hdev)
4511 struct hci_conn *conn;
4512 struct sk_buff *skb;
4515 BT_DBG("%s", hdev->name);
4517 if (!hci_conn_num(hdev, SCO_LINK))
4520 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
4521 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4522 BT_DBG("skb %p len %d", skb, skb->len);
4523 hci_send_frame(hdev, skb);
4526 if (conn->sent == ~0)
4532 static void hci_sched_esco(struct hci_dev *hdev)
4534 struct hci_conn *conn;
4535 struct sk_buff *skb;
4538 BT_DBG("%s", hdev->name);
4540 if (!hci_conn_num(hdev, ESCO_LINK))
4543 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4545 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4546 BT_DBG("skb %p len %d", skb, skb->len);
4547 hci_send_frame(hdev, skb);
4550 if (conn->sent == ~0)
4556 static void hci_sched_acl_pkt(struct hci_dev *hdev)
4558 unsigned int cnt = hdev->acl_cnt;
4559 struct hci_chan *chan;
4560 struct sk_buff *skb;
4563 __check_timeout(hdev, cnt, ACL_LINK);
4565 while (hdev->acl_cnt &&
4566 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
4567 u32 priority = (skb_peek(&chan->data_q))->priority;
4568 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4569 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4570 skb->len, skb->priority);
4572 /* Stop if priority has changed */
4573 if (skb->priority < priority)
4576 skb = skb_dequeue(&chan->data_q);
4578 hci_conn_enter_active_mode(chan->conn,
4579 bt_cb(skb)->force_active);
4581 hci_send_frame(hdev, skb);
4582 hdev->acl_last_tx = jiffies;
4588 /* Send pending SCO packets right away */
4589 hci_sched_sco(hdev);
4590 hci_sched_esco(hdev);
4594 if (cnt != hdev->acl_cnt)
4595 hci_prio_recalculate(hdev, ACL_LINK);
4598 static void hci_sched_acl_blk(struct hci_dev *hdev)
4600 unsigned int cnt = hdev->block_cnt;
4601 struct hci_chan *chan;
4602 struct sk_buff *skb;
4606 BT_DBG("%s", hdev->name);
4608 if (hdev->dev_type == HCI_AMP)
4613 __check_timeout(hdev, cnt, type);
4615 while (hdev->block_cnt > 0 &&
4616 (chan = hci_chan_sent(hdev, type, "e))) {
4617 u32 priority = (skb_peek(&chan->data_q))->priority;
4618 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4621 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4622 skb->len, skb->priority);
4624 /* Stop if priority has changed */
4625 if (skb->priority < priority)
4628 skb = skb_dequeue(&chan->data_q);
4630 blocks = __get_blocks(hdev, skb);
4631 if (blocks > hdev->block_cnt)
4634 hci_conn_enter_active_mode(chan->conn,
4635 bt_cb(skb)->force_active);
4637 hci_send_frame(hdev, skb);
4638 hdev->acl_last_tx = jiffies;
4640 hdev->block_cnt -= blocks;
4643 chan->sent += blocks;
4644 chan->conn->sent += blocks;
4648 if (cnt != hdev->block_cnt)
4649 hci_prio_recalculate(hdev, type);
4652 static void hci_sched_acl(struct hci_dev *hdev)
4654 BT_DBG("%s", hdev->name);
4656 /* No ACL link over BR/EDR controller */
4657 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4660 /* No AMP link over AMP controller */
4661 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4664 switch (hdev->flow_ctl_mode) {
4665 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4666 hci_sched_acl_pkt(hdev);
4669 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4670 hci_sched_acl_blk(hdev);
4675 static void hci_sched_le(struct hci_dev *hdev)
4677 struct hci_chan *chan;
4678 struct sk_buff *skb;
4679 int quote, cnt, tmp;
4681 BT_DBG("%s", hdev->name);
4683 if (!hci_conn_num(hdev, LE_LINK))
4686 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4688 __check_timeout(hdev, cnt, LE_LINK);
4691 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
4692 u32 priority = (skb_peek(&chan->data_q))->priority;
4693 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4694 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4695 skb->len, skb->priority);
4697 /* Stop if priority has changed */
4698 if (skb->priority < priority)
4701 skb = skb_dequeue(&chan->data_q);
4703 hci_send_frame(hdev, skb);
4704 hdev->le_last_tx = jiffies;
4710 /* Send pending SCO packets right away */
4711 hci_sched_sco(hdev);
4712 hci_sched_esco(hdev);
4719 hdev->acl_cnt = cnt;
4722 hci_prio_recalculate(hdev, LE_LINK);
4725 static void hci_tx_work(struct work_struct *work)
4727 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4728 struct sk_buff *skb;
4730 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4731 hdev->sco_cnt, hdev->le_cnt);
4733 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4734 /* Schedule queues and send stuff to HCI driver */
4735 hci_sched_sco(hdev);
4736 hci_sched_esco(hdev);
4737 hci_sched_acl(hdev);
4741 /* Send next queued raw (unknown type) packet */
4742 while ((skb = skb_dequeue(&hdev->raw_q)))
4743 hci_send_frame(hdev, skb);
4746 /* ----- HCI RX task (incoming data processing) ----- */
4748 /* ACL data packet */
4749 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4751 struct hci_acl_hdr *hdr = (void *) skb->data;
4752 struct hci_conn *conn;
4753 __u16 handle, flags;
4755 skb_pull(skb, HCI_ACL_HDR_SIZE);
4757 handle = __le16_to_cpu(hdr->handle);
4758 flags = hci_flags(handle);
4759 handle = hci_handle(handle);
4761 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4764 hdev->stat.acl_rx++;
4767 conn = hci_conn_hash_lookup_handle(hdev, handle);
4768 hci_dev_unlock(hdev);
4771 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4773 /* Send to upper protocol */
4774 l2cap_recv_acldata(conn, skb, flags);
4777 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4784 /* SCO data packet */
4785 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4787 struct hci_sco_hdr *hdr = (void *) skb->data;
4788 struct hci_conn *conn;
4789 __u16 handle, flags;
4791 skb_pull(skb, HCI_SCO_HDR_SIZE);
4793 handle = __le16_to_cpu(hdr->handle);
4794 flags = hci_flags(handle);
4795 handle = hci_handle(handle);
4797 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4800 hdev->stat.sco_rx++;
4803 conn = hci_conn_hash_lookup_handle(hdev, handle);
4804 hci_dev_unlock(hdev);
4807 /* Send to upper protocol */
4808 bt_cb(skb)->sco.pkt_status = flags & 0x03;
4809 sco_recv_scodata(conn, skb);
4812 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4819 static bool hci_req_is_complete(struct hci_dev *hdev)
4821 struct sk_buff *skb;
4823 skb = skb_peek(&hdev->cmd_q);
4827 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4830 static void hci_resend_last(struct hci_dev *hdev)
4832 struct hci_command_hdr *sent;
4833 struct sk_buff *skb;
4836 if (!hdev->sent_cmd)
4839 sent = (void *) hdev->sent_cmd->data;
4840 opcode = __le16_to_cpu(sent->opcode);
4841 if (opcode == HCI_OP_RESET)
4844 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4848 skb_queue_head(&hdev->cmd_q, skb);
4849 queue_work(hdev->workqueue, &hdev->cmd_work);
4852 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4853 hci_req_complete_t *req_complete,
4854 hci_req_complete_skb_t *req_complete_skb)
4856 struct sk_buff *skb;
4857 unsigned long flags;
4859 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4861 /* If the completed command doesn't match the last one that was
4862 * sent we need to do special handling of it.
4864 if (!hci_sent_cmd_data(hdev, opcode)) {
4865 /* Some CSR based controllers generate a spontaneous
4866 * reset complete event during init and any pending
4867 * command will never be completed. In such a case we
4868 * need to resend whatever was the last sent
4871 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4872 hci_resend_last(hdev);
4877 /* If we reach this point this event matches the last command sent */
4878 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4880 /* If the command succeeded and there's still more commands in
4881 * this request the request is not yet complete.
4883 if (!status && !hci_req_is_complete(hdev))
4886 /* If this was the last command in a request the complete
4887 * callback would be found in hdev->sent_cmd instead of the
4888 * command queue (hdev->cmd_q).
4890 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4891 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4895 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4896 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4900 /* Remove all pending commands belonging to this request */
4901 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4902 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4903 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4904 __skb_queue_head(&hdev->cmd_q, skb);
4908 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4909 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4911 *req_complete = bt_cb(skb)->hci.req_complete;
4914 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4917 static void hci_rx_work(struct work_struct *work)
4919 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4920 struct sk_buff *skb;
4922 BT_DBG("%s", hdev->name);
4924 while ((skb = skb_dequeue(&hdev->rx_q))) {
4925 /* Send copy to monitor */
4926 hci_send_to_monitor(hdev, skb);
4928 if (atomic_read(&hdev->promisc)) {
4929 /* Send copy to the sockets */
4930 hci_send_to_sock(hdev, skb);
4933 /* If the device has been opened in HCI_USER_CHANNEL,
4934 * the userspace has exclusive access to device.
4935 * When device is HCI_INIT, we still need to process
4936 * the data packets to the driver in order
4937 * to complete its setup().
4939 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4940 !test_bit(HCI_INIT, &hdev->flags)) {
4945 if (test_bit(HCI_INIT, &hdev->flags)) {
4946 /* Don't process data packets in this states. */
4947 switch (hci_skb_pkt_type(skb)) {
4948 case HCI_ACLDATA_PKT:
4949 case HCI_SCODATA_PKT:
4950 case HCI_ISODATA_PKT:
4957 switch (hci_skb_pkt_type(skb)) {
4959 BT_DBG("%s Event packet", hdev->name);
4960 hci_event_packet(hdev, skb);
4963 case HCI_ACLDATA_PKT:
4964 BT_DBG("%s ACL data packet", hdev->name);
4965 hci_acldata_packet(hdev, skb);
4968 case HCI_SCODATA_PKT:
4969 BT_DBG("%s SCO data packet", hdev->name);
4970 hci_scodata_packet(hdev, skb);
4980 static void hci_cmd_work(struct work_struct *work)
4982 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4983 struct sk_buff *skb;
4985 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4986 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4988 /* Send queued commands */
4989 if (atomic_read(&hdev->cmd_cnt)) {
4990 skb = skb_dequeue(&hdev->cmd_q);
4994 kfree_skb(hdev->sent_cmd);
4996 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4997 if (hdev->sent_cmd) {
4998 if (hci_req_status_pend(hdev))
4999 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
5000 atomic_dec(&hdev->cmd_cnt);
5001 hci_send_frame(hdev, skb);
5002 if (test_bit(HCI_RESET, &hdev->flags))
5003 cancel_delayed_work(&hdev->cmd_timer);
5005 schedule_delayed_work(&hdev->cmd_timer,
5008 skb_queue_head(&hdev->cmd_q, skb);
5009 queue_work(hdev->workqueue, &hdev->cmd_work);