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"
49 static void hci_rx_work(struct work_struct *work);
50 static void hci_cmd_work(struct work_struct *work);
51 static void hci_tx_work(struct work_struct *work);
54 LIST_HEAD(hci_dev_list);
55 DEFINE_RWLOCK(hci_dev_list_lock);
57 /* HCI callback list */
58 LIST_HEAD(hci_cb_list);
59 DEFINE_MUTEX(hci_cb_list_lock);
61 /* HCI ID Numbering */
62 static DEFINE_IDA(hci_index_ida);
64 /* ---- HCI debugfs entries ---- */
66 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
67 size_t count, loff_t *ppos)
69 struct hci_dev *hdev = file->private_data;
72 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
75 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
78 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
79 size_t count, loff_t *ppos)
81 struct hci_dev *hdev = file->private_data;
86 if (!test_bit(HCI_UP, &hdev->flags))
89 err = kstrtobool_from_user(user_buf, count, &enable);
93 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
96 hci_req_sync_lock(hdev);
98 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
101 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
103 hci_req_sync_unlock(hdev);
110 hci_dev_change_flag(hdev, HCI_DUT_MODE);
115 static const struct file_operations dut_mode_fops = {
117 .read = dut_mode_read,
118 .write = dut_mode_write,
119 .llseek = default_llseek,
122 static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
123 size_t count, loff_t *ppos)
125 struct hci_dev *hdev = file->private_data;
128 buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
131 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
134 static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
135 size_t count, loff_t *ppos)
137 struct hci_dev *hdev = file->private_data;
141 err = kstrtobool_from_user(user_buf, count, &enable);
145 /* When the diagnostic flags are not persistent and the transport
146 * is not active or in user channel operation, then there is no need
147 * for the vendor callback. Instead just store the desired value and
148 * the setting will be programmed when the controller gets powered on.
150 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
151 (!test_bit(HCI_RUNNING, &hdev->flags) ||
152 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
155 hci_req_sync_lock(hdev);
156 err = hdev->set_diag(hdev, enable);
157 hci_req_sync_unlock(hdev);
164 hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
166 hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
171 static const struct file_operations vendor_diag_fops = {
173 .read = vendor_diag_read,
174 .write = vendor_diag_write,
175 .llseek = default_llseek,
178 static void hci_debugfs_create_basic(struct hci_dev *hdev)
180 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
184 debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
188 static int hci_reset_req(struct hci_request *req, unsigned long opt)
190 BT_DBG("%s %ld", req->hdev->name, opt);
193 set_bit(HCI_RESET, &req->hdev->flags);
194 hci_req_add(req, HCI_OP_RESET, 0, NULL);
198 static void bredr_init(struct hci_request *req)
200 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
202 /* Read Local Supported Features */
203 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
205 /* Read Local Version */
206 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
208 /* Read BD Address */
209 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
212 static void amp_init1(struct hci_request *req)
214 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
216 /* Read Local Version */
217 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
219 /* Read Local Supported Commands */
220 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
222 /* Read Local AMP Info */
223 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
225 /* Read Data Blk size */
226 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
228 /* Read Flow Control Mode */
229 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
231 /* Read Location Data */
232 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
235 static int amp_init2(struct hci_request *req)
237 /* Read Local Supported Features. Not all AMP controllers
238 * support this so it's placed conditionally in the second
241 if (req->hdev->commands[14] & 0x20)
242 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
247 static int hci_init1_req(struct hci_request *req, unsigned long opt)
249 struct hci_dev *hdev = req->hdev;
251 BT_DBG("%s %ld", hdev->name, opt);
254 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
255 hci_reset_req(req, 0);
257 switch (hdev->dev_type) {
265 bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
272 static void bredr_setup(struct hci_request *req)
277 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
278 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
280 /* Read Class of Device */
281 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
283 /* Read Local Name */
284 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
286 /* Read Voice Setting */
287 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
289 /* Read Number of Supported IAC */
290 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
292 /* Read Current IAC LAP */
293 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
295 /* Clear Event Filters */
296 flt_type = HCI_FLT_CLEAR_ALL;
297 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
299 /* Connection accept timeout ~20 secs */
300 param = cpu_to_le16(0x7d00);
301 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
304 static void le_setup(struct hci_request *req)
306 struct hci_dev *hdev = req->hdev;
308 /* Read LE Buffer Size */
309 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
311 /* Read LE Local Supported Features */
312 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
314 /* Read LE Supported States */
315 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
317 /* LE-only controllers have LE implicitly enabled */
318 if (!lmp_bredr_capable(hdev))
319 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
322 static void hci_setup_event_mask(struct hci_request *req)
324 struct hci_dev *hdev = req->hdev;
326 /* The second byte is 0xff instead of 0x9f (two reserved bits
327 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
330 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
332 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
333 * any event mask for pre 1.2 devices.
335 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
338 if (lmp_bredr_capable(hdev)) {
339 events[4] |= 0x01; /* Flow Specification Complete */
341 /* Use a different default for LE-only devices */
342 memset(events, 0, sizeof(events));
343 events[1] |= 0x20; /* Command Complete */
344 events[1] |= 0x40; /* Command Status */
345 events[1] |= 0x80; /* Hardware Error */
347 /* If the controller supports the Disconnect command, enable
348 * the corresponding event. In addition enable packet flow
349 * control related events.
351 if (hdev->commands[0] & 0x20) {
352 events[0] |= 0x10; /* Disconnection Complete */
353 events[2] |= 0x04; /* Number of Completed Packets */
354 events[3] |= 0x02; /* Data Buffer Overflow */
357 /* If the controller supports the Read Remote Version
358 * Information command, enable the corresponding event.
360 if (hdev->commands[2] & 0x80)
361 events[1] |= 0x08; /* Read Remote Version Information
365 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
366 events[0] |= 0x80; /* Encryption Change */
367 events[5] |= 0x80; /* Encryption Key Refresh Complete */
371 if (lmp_inq_rssi_capable(hdev) ||
372 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
373 events[4] |= 0x02; /* Inquiry Result with RSSI */
375 if (lmp_ext_feat_capable(hdev))
376 events[4] |= 0x04; /* Read Remote Extended Features Complete */
378 if (lmp_esco_capable(hdev)) {
379 events[5] |= 0x08; /* Synchronous Connection Complete */
380 events[5] |= 0x10; /* Synchronous Connection Changed */
383 if (lmp_sniffsubr_capable(hdev))
384 events[5] |= 0x20; /* Sniff Subrating */
386 if (lmp_pause_enc_capable(hdev))
387 events[5] |= 0x80; /* Encryption Key Refresh Complete */
389 if (lmp_ext_inq_capable(hdev))
390 events[5] |= 0x40; /* Extended Inquiry Result */
392 if (lmp_no_flush_capable(hdev))
393 events[7] |= 0x01; /* Enhanced Flush Complete */
395 if (lmp_lsto_capable(hdev))
396 events[6] |= 0x80; /* Link Supervision Timeout Changed */
398 if (lmp_ssp_capable(hdev)) {
399 events[6] |= 0x01; /* IO Capability Request */
400 events[6] |= 0x02; /* IO Capability Response */
401 events[6] |= 0x04; /* User Confirmation Request */
402 events[6] |= 0x08; /* User Passkey Request */
403 events[6] |= 0x10; /* Remote OOB Data Request */
404 events[6] |= 0x20; /* Simple Pairing Complete */
405 events[7] |= 0x04; /* User Passkey Notification */
406 events[7] |= 0x08; /* Keypress Notification */
407 events[7] |= 0x10; /* Remote Host Supported
408 * Features Notification
412 if (lmp_le_capable(hdev))
413 events[7] |= 0x20; /* LE Meta-Event */
415 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
418 static int hci_init2_req(struct hci_request *req, unsigned long opt)
420 struct hci_dev *hdev = req->hdev;
422 if (hdev->dev_type == HCI_AMP)
423 return amp_init2(req);
425 if (lmp_bredr_capable(hdev))
428 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
430 if (lmp_le_capable(hdev))
433 /* All Bluetooth 1.2 and later controllers should support the
434 * HCI command for reading the local supported commands.
436 * Unfortunately some controllers indicate Bluetooth 1.2 support,
437 * but do not have support for this command. If that is the case,
438 * the driver can quirk the behavior and skip reading the local
439 * supported commands.
441 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
442 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
443 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
445 if (lmp_ssp_capable(hdev)) {
446 /* When SSP is available, then the host features page
447 * should also be available as well. However some
448 * controllers list the max_page as 0 as long as SSP
449 * has not been enabled. To achieve proper debugging
450 * output, force the minimum max_page to 1 at least.
452 hdev->max_page = 0x01;
454 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
457 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
458 sizeof(mode), &mode);
460 struct hci_cp_write_eir cp;
462 memset(hdev->eir, 0, sizeof(hdev->eir));
463 memset(&cp, 0, sizeof(cp));
465 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
469 if (lmp_inq_rssi_capable(hdev) ||
470 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
473 /* If Extended Inquiry Result events are supported, then
474 * they are clearly preferred over Inquiry Result with RSSI
477 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
479 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
482 if (lmp_inq_tx_pwr_capable(hdev))
483 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
485 if (lmp_ext_feat_capable(hdev)) {
486 struct hci_cp_read_local_ext_features cp;
489 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
493 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
495 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
502 static void hci_setup_link_policy(struct hci_request *req)
504 struct hci_dev *hdev = req->hdev;
505 struct hci_cp_write_def_link_policy cp;
508 if (lmp_rswitch_capable(hdev))
509 link_policy |= HCI_LP_RSWITCH;
510 if (lmp_hold_capable(hdev))
511 link_policy |= HCI_LP_HOLD;
512 if (lmp_sniff_capable(hdev))
513 link_policy |= HCI_LP_SNIFF;
514 if (lmp_park_capable(hdev))
515 link_policy |= HCI_LP_PARK;
517 cp.policy = cpu_to_le16(link_policy);
518 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
521 static void hci_set_le_support(struct hci_request *req)
523 struct hci_dev *hdev = req->hdev;
524 struct hci_cp_write_le_host_supported cp;
526 /* LE-only devices do not support explicit enablement */
527 if (!lmp_bredr_capable(hdev))
530 memset(&cp, 0, sizeof(cp));
532 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
537 if (cp.le != lmp_host_le_capable(hdev))
538 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
542 static void hci_set_event_mask_page_2(struct hci_request *req)
544 struct hci_dev *hdev = req->hdev;
545 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
546 bool changed = false;
548 /* If Connectionless Slave Broadcast master role is supported
549 * enable all necessary events for it.
551 if (lmp_csb_master_capable(hdev)) {
552 events[1] |= 0x40; /* Triggered Clock Capture */
553 events[1] |= 0x80; /* Synchronization Train Complete */
554 events[2] |= 0x10; /* Slave Page Response Timeout */
555 events[2] |= 0x20; /* CSB Channel Map Change */
559 /* If Connectionless Slave Broadcast slave role is supported
560 * enable all necessary events for it.
562 if (lmp_csb_slave_capable(hdev)) {
563 events[2] |= 0x01; /* Synchronization Train Received */
564 events[2] |= 0x02; /* CSB Receive */
565 events[2] |= 0x04; /* CSB Timeout */
566 events[2] |= 0x08; /* Truncated Page Complete */
570 /* Enable Authenticated Payload Timeout Expired event if supported */
571 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
576 /* Some Broadcom based controllers indicate support for Set Event
577 * Mask Page 2 command, but then actually do not support it. Since
578 * the default value is all bits set to zero, the command is only
579 * required if the event mask has to be changed. In case no change
580 * to the event mask is needed, skip this command.
583 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
584 sizeof(events), events);
587 static int hci_init3_req(struct hci_request *req, unsigned long opt)
589 struct hci_dev *hdev = req->hdev;
592 hci_setup_event_mask(req);
594 if (hdev->commands[6] & 0x20 &&
595 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
596 struct hci_cp_read_stored_link_key cp;
598 bacpy(&cp.bdaddr, BDADDR_ANY);
600 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
603 if (hdev->commands[5] & 0x10)
604 hci_setup_link_policy(req);
606 if (hdev->commands[8] & 0x01)
607 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
609 if (hdev->commands[18] & 0x04 &&
610 !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
611 hci_req_add(req, HCI_OP_READ_DEF_ERR_DATA_REPORTING, 0, NULL);
613 /* Some older Broadcom based Bluetooth 1.2 controllers do not
614 * support the Read Page Scan Type command. Check support for
615 * this command in the bit mask of supported commands.
617 if (hdev->commands[13] & 0x01)
618 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
620 if (lmp_le_capable(hdev)) {
623 memset(events, 0, sizeof(events));
625 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
626 events[0] |= 0x10; /* LE Long Term Key Request */
628 /* If controller supports the Connection Parameters Request
629 * Link Layer Procedure, enable the corresponding event.
631 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
632 events[0] |= 0x20; /* LE Remote Connection
636 /* If the controller supports the Data Length Extension
637 * feature, enable the corresponding event.
639 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
640 events[0] |= 0x40; /* LE Data Length Change */
642 /* If the controller supports LL Privacy feature, enable
643 * the corresponding event.
645 if (hdev->le_features[0] & HCI_LE_LL_PRIVACY)
646 events[1] |= 0x02; /* LE Enhanced Connection
650 /* If the controller supports Extended Scanner Filter
651 * Policies, enable the correspondig event.
653 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
654 events[1] |= 0x04; /* LE Direct Advertising
658 /* If the controller supports Channel Selection Algorithm #2
659 * feature, enable the corresponding event.
661 if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
662 events[2] |= 0x08; /* LE Channel Selection
666 /* If the controller supports the LE Set Scan Enable command,
667 * enable the corresponding advertising report event.
669 if (hdev->commands[26] & 0x08)
670 events[0] |= 0x02; /* LE Advertising Report */
672 /* If the controller supports the LE Create Connection
673 * command, enable the corresponding event.
675 if (hdev->commands[26] & 0x10)
676 events[0] |= 0x01; /* LE Connection Complete */
678 /* If the controller supports the LE Connection Update
679 * command, enable the corresponding event.
681 if (hdev->commands[27] & 0x04)
682 events[0] |= 0x04; /* LE Connection Update
686 /* If the controller supports the LE Read Remote Used Features
687 * command, enable the corresponding event.
689 if (hdev->commands[27] & 0x20)
690 events[0] |= 0x08; /* LE Read Remote Used
694 /* If the controller supports the LE Read Local P-256
695 * Public Key command, enable the corresponding event.
697 if (hdev->commands[34] & 0x02)
698 events[0] |= 0x80; /* LE Read Local P-256
699 * Public Key Complete
702 /* If the controller supports the LE Generate DHKey
703 * command, enable the corresponding event.
705 if (hdev->commands[34] & 0x04)
706 events[1] |= 0x01; /* LE Generate DHKey Complete */
708 /* If the controller supports the LE Set Default PHY or
709 * LE Set PHY commands, enable the corresponding event.
711 if (hdev->commands[35] & (0x20 | 0x40))
712 events[1] |= 0x08; /* LE PHY Update Complete */
714 /* If the controller supports LE Set Extended Scan Parameters
715 * and LE Set Extended Scan Enable commands, enable the
716 * corresponding event.
718 if (use_ext_scan(hdev))
719 events[1] |= 0x10; /* LE Extended Advertising
723 /* If the controller supports the LE Extended Advertising
724 * command, enable the corresponding event.
726 if (ext_adv_capable(hdev))
727 events[2] |= 0x02; /* LE Advertising Set
731 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
734 /* Read LE Advertising Channel TX Power */
735 if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
736 /* HCI TS spec forbids mixing of legacy and extended
737 * advertising commands wherein READ_ADV_TX_POWER is
738 * also included. So do not call it if extended adv
739 * is supported otherwise controller will return
740 * COMMAND_DISALLOWED for extended commands.
742 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
745 if (hdev->commands[38] & 0x80) {
746 /* Read LE Min/Max Tx Power*/
747 hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER,
751 if (hdev->commands[26] & 0x40) {
752 /* Read LE White List Size */
753 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
757 if (hdev->commands[26] & 0x80) {
758 /* Clear LE White List */
759 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
762 if (hdev->commands[34] & 0x40) {
763 /* Read LE Resolving List Size */
764 hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
768 if (hdev->commands[34] & 0x20) {
769 /* Clear LE Resolving List */
770 hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
773 if (hdev->commands[35] & 0x04) {
774 __le16 rpa_timeout = cpu_to_le16(hdev->rpa_timeout);
776 /* Set RPA timeout */
777 hci_req_add(req, HCI_OP_LE_SET_RPA_TIMEOUT, 2,
781 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
782 /* Read LE Maximum Data Length */
783 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
785 /* Read LE Suggested Default Data Length */
786 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
789 if (ext_adv_capable(hdev)) {
790 /* Read LE Number of Supported Advertising Sets */
791 hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
795 hci_set_le_support(req);
798 /* Read features beyond page 1 if available */
799 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
800 struct hci_cp_read_local_ext_features cp;
803 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
810 static int hci_init4_req(struct hci_request *req, unsigned long opt)
812 struct hci_dev *hdev = req->hdev;
814 /* Some Broadcom based Bluetooth controllers do not support the
815 * Delete Stored Link Key command. They are clearly indicating its
816 * absence in the bit mask of supported commands.
818 * Check the supported commands and only if the command is marked
819 * as supported send it. If not supported assume that the controller
820 * does not have actual support for stored link keys which makes this
821 * command redundant anyway.
823 * Some controllers indicate that they support handling deleting
824 * stored link keys, but they don't. The quirk lets a driver
825 * just disable this command.
827 if (hdev->commands[6] & 0x80 &&
828 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
829 struct hci_cp_delete_stored_link_key cp;
831 bacpy(&cp.bdaddr, BDADDR_ANY);
832 cp.delete_all = 0x01;
833 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
837 /* Set event mask page 2 if the HCI command for it is supported */
838 if (hdev->commands[22] & 0x04)
839 hci_set_event_mask_page_2(req);
841 /* Read local codec list if the HCI command is supported */
842 if (hdev->commands[29] & 0x20)
843 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
845 /* Read local pairing options if the HCI command is supported */
846 if (hdev->commands[41] & 0x08)
847 hci_req_add(req, HCI_OP_READ_LOCAL_PAIRING_OPTS, 0, NULL);
849 /* Get MWS transport configuration if the HCI command is supported */
850 if (hdev->commands[30] & 0x08)
851 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
853 /* Check for Synchronization Train support */
854 if (lmp_sync_train_capable(hdev))
855 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
857 /* Enable Secure Connections if supported and configured */
858 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
859 bredr_sc_enabled(hdev)) {
862 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
863 sizeof(support), &support);
866 /* Set erroneous data reporting if supported to the wideband speech
869 if (hdev->commands[18] & 0x08 &&
870 !test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks)) {
871 bool enabled = hci_dev_test_flag(hdev,
872 HCI_WIDEBAND_SPEECH_ENABLED);
875 (hdev->err_data_reporting == ERR_DATA_REPORTING_ENABLED)) {
876 struct hci_cp_write_def_err_data_reporting cp;
878 cp.err_data_reporting = enabled ?
879 ERR_DATA_REPORTING_ENABLED :
880 ERR_DATA_REPORTING_DISABLED;
882 hci_req_add(req, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
887 /* Set Suggested Default Data Length to maximum if supported */
888 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
889 struct hci_cp_le_write_def_data_len cp;
891 cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
892 cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
893 hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
896 /* Set Default PHY parameters if command is supported */
897 if (hdev->commands[35] & 0x20) {
898 struct hci_cp_le_set_default_phy cp;
901 cp.tx_phys = hdev->le_tx_def_phys;
902 cp.rx_phys = hdev->le_rx_def_phys;
904 hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
910 static int __hci_init(struct hci_dev *hdev)
914 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
918 if (hci_dev_test_flag(hdev, HCI_SETUP))
919 hci_debugfs_create_basic(hdev);
921 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
925 /* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
926 * BR/EDR/LE type controllers. AMP controllers only need the
927 * first two stages of init.
929 if (hdev->dev_type != HCI_PRIMARY)
932 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
936 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
940 /* This function is only called when the controller is actually in
941 * configured state. When the controller is marked as unconfigured,
942 * this initialization procedure is not run.
944 * It means that it is possible that a controller runs through its
945 * setup phase and then discovers missing settings. If that is the
946 * case, then this function will not be called. It then will only
947 * be called during the config phase.
949 * So only when in setup phase or config phase, create the debugfs
950 * entries and register the SMP channels.
952 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
953 !hci_dev_test_flag(hdev, HCI_CONFIG))
956 hci_debugfs_create_common(hdev);
958 if (lmp_bredr_capable(hdev))
959 hci_debugfs_create_bredr(hdev);
961 if (lmp_le_capable(hdev))
962 hci_debugfs_create_le(hdev);
967 static int hci_init0_req(struct hci_request *req, unsigned long opt)
969 struct hci_dev *hdev = req->hdev;
971 BT_DBG("%s %ld", hdev->name, opt);
974 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
975 hci_reset_req(req, 0);
977 /* Read Local Version */
978 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
980 /* Read BD Address */
981 if (hdev->set_bdaddr)
982 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
987 static int __hci_unconf_init(struct hci_dev *hdev)
991 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
994 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
998 if (hci_dev_test_flag(hdev, HCI_SETUP))
999 hci_debugfs_create_basic(hdev);
1004 static int hci_scan_req(struct hci_request *req, unsigned long opt)
1008 BT_DBG("%s %x", req->hdev->name, scan);
1010 /* Inquiry and Page scans */
1011 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1015 static int hci_auth_req(struct hci_request *req, unsigned long opt)
1019 BT_DBG("%s %x", req->hdev->name, auth);
1021 /* Authentication */
1022 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1026 static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
1030 BT_DBG("%s %x", req->hdev->name, encrypt);
1033 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1037 static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
1039 __le16 policy = cpu_to_le16(opt);
1041 BT_DBG("%s %x", req->hdev->name, policy);
1043 /* Default link policy */
1044 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1048 /* Get HCI device by index.
1049 * Device is held on return. */
1050 struct hci_dev *hci_dev_get(int index)
1052 struct hci_dev *hdev = NULL, *d;
1054 BT_DBG("%d", index);
1059 read_lock(&hci_dev_list_lock);
1060 list_for_each_entry(d, &hci_dev_list, list) {
1061 if (d->id == index) {
1062 hdev = hci_dev_hold(d);
1066 read_unlock(&hci_dev_list_lock);
1070 /* ---- Inquiry support ---- */
1072 bool hci_discovery_active(struct hci_dev *hdev)
1074 struct discovery_state *discov = &hdev->discovery;
1076 switch (discov->state) {
1077 case DISCOVERY_FINDING:
1078 case DISCOVERY_RESOLVING:
1086 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1088 int old_state = hdev->discovery.state;
1090 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1092 if (old_state == state)
1095 hdev->discovery.state = state;
1098 case DISCOVERY_STOPPED:
1099 hci_update_background_scan(hdev);
1101 if (old_state != DISCOVERY_STARTING)
1102 mgmt_discovering(hdev, 0);
1104 case DISCOVERY_STARTING:
1106 case DISCOVERY_FINDING:
1107 mgmt_discovering(hdev, 1);
1109 case DISCOVERY_RESOLVING:
1111 case DISCOVERY_STOPPING:
1116 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1118 struct discovery_state *cache = &hdev->discovery;
1119 struct inquiry_entry *p, *n;
1121 list_for_each_entry_safe(p, n, &cache->all, all) {
1126 INIT_LIST_HEAD(&cache->unknown);
1127 INIT_LIST_HEAD(&cache->resolve);
1130 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1133 struct discovery_state *cache = &hdev->discovery;
1134 struct inquiry_entry *e;
1136 BT_DBG("cache %p, %pMR", cache, bdaddr);
1138 list_for_each_entry(e, &cache->all, all) {
1139 if (!bacmp(&e->data.bdaddr, bdaddr))
1146 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1149 struct discovery_state *cache = &hdev->discovery;
1150 struct inquiry_entry *e;
1152 BT_DBG("cache %p, %pMR", cache, bdaddr);
1154 list_for_each_entry(e, &cache->unknown, list) {
1155 if (!bacmp(&e->data.bdaddr, bdaddr))
1162 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1166 struct discovery_state *cache = &hdev->discovery;
1167 struct inquiry_entry *e;
1169 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1171 list_for_each_entry(e, &cache->resolve, list) {
1172 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1174 if (!bacmp(&e->data.bdaddr, bdaddr))
1181 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1182 struct inquiry_entry *ie)
1184 struct discovery_state *cache = &hdev->discovery;
1185 struct list_head *pos = &cache->resolve;
1186 struct inquiry_entry *p;
1188 list_del(&ie->list);
1190 list_for_each_entry(p, &cache->resolve, list) {
1191 if (p->name_state != NAME_PENDING &&
1192 abs(p->data.rssi) >= abs(ie->data.rssi))
1197 list_add(&ie->list, pos);
1200 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1203 struct discovery_state *cache = &hdev->discovery;
1204 struct inquiry_entry *ie;
1207 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1209 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1211 if (!data->ssp_mode)
1212 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1214 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1216 if (!ie->data.ssp_mode)
1217 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1219 if (ie->name_state == NAME_NEEDED &&
1220 data->rssi != ie->data.rssi) {
1221 ie->data.rssi = data->rssi;
1222 hci_inquiry_cache_update_resolve(hdev, ie);
1228 /* Entry not in the cache. Add new one. */
1229 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1231 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1235 list_add(&ie->all, &cache->all);
1238 ie->name_state = NAME_KNOWN;
1240 ie->name_state = NAME_NOT_KNOWN;
1241 list_add(&ie->list, &cache->unknown);
1245 if (name_known && ie->name_state != NAME_KNOWN &&
1246 ie->name_state != NAME_PENDING) {
1247 ie->name_state = NAME_KNOWN;
1248 list_del(&ie->list);
1251 memcpy(&ie->data, data, sizeof(*data));
1252 ie->timestamp = jiffies;
1253 cache->timestamp = jiffies;
1255 if (ie->name_state == NAME_NOT_KNOWN)
1256 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1262 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1264 struct discovery_state *cache = &hdev->discovery;
1265 struct inquiry_info *info = (struct inquiry_info *) buf;
1266 struct inquiry_entry *e;
1269 list_for_each_entry(e, &cache->all, all) {
1270 struct inquiry_data *data = &e->data;
1275 bacpy(&info->bdaddr, &data->bdaddr);
1276 info->pscan_rep_mode = data->pscan_rep_mode;
1277 info->pscan_period_mode = data->pscan_period_mode;
1278 info->pscan_mode = data->pscan_mode;
1279 memcpy(info->dev_class, data->dev_class, 3);
1280 info->clock_offset = data->clock_offset;
1286 BT_DBG("cache %p, copied %d", cache, copied);
1290 static int hci_inq_req(struct hci_request *req, unsigned long opt)
1292 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1293 struct hci_dev *hdev = req->hdev;
1294 struct hci_cp_inquiry cp;
1296 BT_DBG("%s", hdev->name);
1298 if (test_bit(HCI_INQUIRY, &hdev->flags))
1302 memcpy(&cp.lap, &ir->lap, 3);
1303 cp.length = ir->length;
1304 cp.num_rsp = ir->num_rsp;
1305 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1310 int hci_inquiry(void __user *arg)
1312 __u8 __user *ptr = arg;
1313 struct hci_inquiry_req ir;
1314 struct hci_dev *hdev;
1315 int err = 0, do_inquiry = 0, max_rsp;
1319 if (copy_from_user(&ir, ptr, sizeof(ir)))
1322 hdev = hci_dev_get(ir.dev_id);
1326 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1331 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1336 if (hdev->dev_type != HCI_PRIMARY) {
1341 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1347 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1348 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1349 hci_inquiry_cache_flush(hdev);
1352 hci_dev_unlock(hdev);
1354 timeo = ir.length * msecs_to_jiffies(2000);
1357 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1362 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1363 * cleared). If it is interrupted by a signal, return -EINTR.
1365 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1366 TASK_INTERRUPTIBLE)) {
1372 /* for unlimited number of responses we will use buffer with
1375 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1377 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1378 * copy it to the user space.
1380 buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1387 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1388 hci_dev_unlock(hdev);
1390 BT_DBG("num_rsp %d", ir.num_rsp);
1392 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1394 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1408 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
1409 * (BD_ADDR) for a HCI device from
1410 * a firmware node property.
1411 * @hdev: The HCI device
1413 * Search the firmware node for 'local-bd-address'.
1415 * All-zero BD addresses are rejected, because those could be properties
1416 * that exist in the firmware tables, but were not updated by the firmware. For
1417 * example, the DTS could define 'local-bd-address', with zero BD addresses.
1419 static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
1421 struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
1425 ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
1426 (u8 *)&ba, sizeof(ba));
1427 if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
1430 bacpy(&hdev->public_addr, &ba);
1433 static int hci_dev_do_open(struct hci_dev *hdev)
1437 BT_DBG("%s %p", hdev->name, hdev);
1439 hci_req_sync_lock(hdev);
1441 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1446 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1447 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1448 /* Check for rfkill but allow the HCI setup stage to
1449 * proceed (which in itself doesn't cause any RF activity).
1451 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1456 /* Check for valid public address or a configured static
1457 * random adddress, but let the HCI setup proceed to
1458 * be able to determine if there is a public address
1461 * In case of user channel usage, it is not important
1462 * if a public address or static random address is
1465 * This check is only valid for BR/EDR controllers
1466 * since AMP controllers do not have an address.
1468 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1469 hdev->dev_type == HCI_PRIMARY &&
1470 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1471 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1472 ret = -EADDRNOTAVAIL;
1477 if (test_bit(HCI_UP, &hdev->flags)) {
1482 if (hdev->open(hdev)) {
1487 set_bit(HCI_RUNNING, &hdev->flags);
1488 hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1490 atomic_set(&hdev->cmd_cnt, 1);
1491 set_bit(HCI_INIT, &hdev->flags);
1493 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1494 test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1495 bool invalid_bdaddr;
1497 hci_sock_dev_event(hdev, HCI_DEV_SETUP);
1500 ret = hdev->setup(hdev);
1502 /* The transport driver can set the quirk to mark the
1503 * BD_ADDR invalid before creating the HCI device or in
1504 * its setup callback.
1506 invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
1512 if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
1513 if (!bacmp(&hdev->public_addr, BDADDR_ANY))
1514 hci_dev_get_bd_addr_from_property(hdev);
1516 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1518 ret = hdev->set_bdaddr(hdev,
1519 &hdev->public_addr);
1521 /* If setting of the BD_ADDR from the device
1522 * property succeeds, then treat the address
1523 * as valid even if the invalid BD_ADDR
1524 * quirk indicates otherwise.
1527 invalid_bdaddr = false;
1532 /* The transport driver can set these quirks before
1533 * creating the HCI device or in its setup callback.
1535 * For the invalid BD_ADDR quirk it is possible that
1536 * it becomes a valid address if the bootloader does
1537 * provide it (see above).
1539 * In case any of them is set, the controller has to
1540 * start up as unconfigured.
1542 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1544 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1546 /* For an unconfigured controller it is required to
1547 * read at least the version information provided by
1548 * the Read Local Version Information command.
1550 * If the set_bdaddr driver callback is provided, then
1551 * also the original Bluetooth public device address
1552 * will be read using the Read BD Address command.
1554 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1555 ret = __hci_unconf_init(hdev);
1558 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1559 /* If public address change is configured, ensure that
1560 * the address gets programmed. If the driver does not
1561 * support changing the public address, fail the power
1564 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1566 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1568 ret = -EADDRNOTAVAIL;
1572 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1573 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1574 ret = __hci_init(hdev);
1575 if (!ret && hdev->post_init)
1576 ret = hdev->post_init(hdev);
1580 /* If the HCI Reset command is clearing all diagnostic settings,
1581 * then they need to be reprogrammed after the init procedure
1584 if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1585 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1586 hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
1587 ret = hdev->set_diag(hdev, true);
1592 clear_bit(HCI_INIT, &hdev->flags);
1596 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1597 hci_adv_instances_set_rpa_expired(hdev, true);
1598 set_bit(HCI_UP, &hdev->flags);
1599 hci_sock_dev_event(hdev, HCI_DEV_UP);
1600 hci_leds_update_powered(hdev, true);
1601 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1602 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1603 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1604 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1605 hci_dev_test_flag(hdev, HCI_MGMT) &&
1606 hdev->dev_type == HCI_PRIMARY) {
1607 ret = __hci_req_hci_power_on(hdev);
1608 mgmt_power_on(hdev, ret);
1611 /* Init failed, cleanup */
1612 flush_work(&hdev->tx_work);
1614 /* Since hci_rx_work() is possible to awake new cmd_work
1615 * it should be flushed first to avoid unexpected call of
1618 flush_work(&hdev->rx_work);
1619 flush_work(&hdev->cmd_work);
1621 skb_queue_purge(&hdev->cmd_q);
1622 skb_queue_purge(&hdev->rx_q);
1627 if (hdev->sent_cmd) {
1628 kfree_skb(hdev->sent_cmd);
1629 hdev->sent_cmd = NULL;
1632 clear_bit(HCI_RUNNING, &hdev->flags);
1633 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1636 hdev->flags &= BIT(HCI_RAW);
1640 hci_req_sync_unlock(hdev);
1644 /* ---- HCI ioctl helpers ---- */
1646 int hci_dev_open(__u16 dev)
1648 struct hci_dev *hdev;
1651 hdev = hci_dev_get(dev);
1655 /* Devices that are marked as unconfigured can only be powered
1656 * up as user channel. Trying to bring them up as normal devices
1657 * will result into a failure. Only user channel operation is
1660 * When this function is called for a user channel, the flag
1661 * HCI_USER_CHANNEL will be set first before attempting to
1664 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1665 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1670 /* We need to ensure that no other power on/off work is pending
1671 * before proceeding to call hci_dev_do_open. This is
1672 * particularly important if the setup procedure has not yet
1675 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1676 cancel_delayed_work(&hdev->power_off);
1678 /* After this call it is guaranteed that the setup procedure
1679 * has finished. This means that error conditions like RFKILL
1680 * or no valid public or static random address apply.
1682 flush_workqueue(hdev->req_workqueue);
1684 /* For controllers not using the management interface and that
1685 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1686 * so that pairing works for them. Once the management interface
1687 * is in use this bit will be cleared again and userspace has
1688 * to explicitly enable it.
1690 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1691 !hci_dev_test_flag(hdev, HCI_MGMT))
1692 hci_dev_set_flag(hdev, HCI_BONDABLE);
1694 err = hci_dev_do_open(hdev);
1701 /* This function requires the caller holds hdev->lock */
1702 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1704 struct hci_conn_params *p;
1706 list_for_each_entry(p, &hdev->le_conn_params, list) {
1708 hci_conn_drop(p->conn);
1709 hci_conn_put(p->conn);
1712 list_del_init(&p->action);
1715 BT_DBG("All LE pending actions cleared");
1718 int hci_dev_do_close(struct hci_dev *hdev)
1722 BT_DBG("%s %p", hdev->name, hdev);
1724 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1725 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1726 test_bit(HCI_UP, &hdev->flags)) {
1727 /* Execute vendor specific shutdown routine */
1729 hdev->shutdown(hdev);
1732 cancel_delayed_work(&hdev->power_off);
1734 hci_request_cancel_all(hdev);
1735 hci_req_sync_lock(hdev);
1737 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1738 cancel_delayed_work_sync(&hdev->cmd_timer);
1739 hci_req_sync_unlock(hdev);
1743 hci_leds_update_powered(hdev, false);
1745 /* Flush RX and TX works */
1746 flush_work(&hdev->tx_work);
1747 flush_work(&hdev->rx_work);
1749 if (hdev->discov_timeout > 0) {
1750 hdev->discov_timeout = 0;
1751 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1752 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1755 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1756 cancel_delayed_work(&hdev->service_cache);
1758 if (hci_dev_test_flag(hdev, HCI_MGMT)) {
1759 struct adv_info *adv_instance;
1761 cancel_delayed_work_sync(&hdev->rpa_expired);
1763 list_for_each_entry(adv_instance, &hdev->adv_instances, list)
1764 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1767 /* Avoid potential lockdep warnings from the *_flush() calls by
1768 * ensuring the workqueue is empty up front.
1770 drain_workqueue(hdev->workqueue);
1774 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1776 auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
1778 if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1779 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1780 hci_dev_test_flag(hdev, HCI_MGMT))
1781 __mgmt_power_off(hdev);
1783 hci_inquiry_cache_flush(hdev);
1784 hci_pend_le_actions_clear(hdev);
1785 hci_conn_hash_flush(hdev);
1786 hci_dev_unlock(hdev);
1788 smp_unregister(hdev);
1790 hci_sock_dev_event(hdev, HCI_DEV_DOWN);
1792 aosp_do_close(hdev);
1793 msft_do_close(hdev);
1799 skb_queue_purge(&hdev->cmd_q);
1800 atomic_set(&hdev->cmd_cnt, 1);
1801 if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
1802 !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1803 set_bit(HCI_INIT, &hdev->flags);
1804 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
1805 clear_bit(HCI_INIT, &hdev->flags);
1808 /* flush cmd work */
1809 flush_work(&hdev->cmd_work);
1812 skb_queue_purge(&hdev->rx_q);
1813 skb_queue_purge(&hdev->cmd_q);
1814 skb_queue_purge(&hdev->raw_q);
1816 /* Drop last sent command */
1817 if (hdev->sent_cmd) {
1818 cancel_delayed_work_sync(&hdev->cmd_timer);
1819 kfree_skb(hdev->sent_cmd);
1820 hdev->sent_cmd = NULL;
1823 clear_bit(HCI_RUNNING, &hdev->flags);
1824 hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1826 if (test_and_clear_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks))
1827 wake_up(&hdev->suspend_wait_q);
1829 /* After this point our queues are empty
1830 * and no tasks are scheduled. */
1834 hdev->flags &= BIT(HCI_RAW);
1835 hci_dev_clear_volatile_flags(hdev);
1837 /* Controller radio is available but is currently powered down */
1838 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1840 memset(hdev->eir, 0, sizeof(hdev->eir));
1841 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1842 bacpy(&hdev->random_addr, BDADDR_ANY);
1844 hci_req_sync_unlock(hdev);
1850 int hci_dev_close(__u16 dev)
1852 struct hci_dev *hdev;
1855 hdev = hci_dev_get(dev);
1859 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1864 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1865 cancel_delayed_work(&hdev->power_off);
1867 err = hci_dev_do_close(hdev);
1874 static int hci_dev_do_reset(struct hci_dev *hdev)
1878 BT_DBG("%s %p", hdev->name, hdev);
1880 hci_req_sync_lock(hdev);
1883 skb_queue_purge(&hdev->rx_q);
1884 skb_queue_purge(&hdev->cmd_q);
1886 /* Avoid potential lockdep warnings from the *_flush() calls by
1887 * ensuring the workqueue is empty up front.
1889 drain_workqueue(hdev->workqueue);
1892 hci_inquiry_cache_flush(hdev);
1893 hci_conn_hash_flush(hdev);
1894 hci_dev_unlock(hdev);
1899 atomic_set(&hdev->cmd_cnt, 1);
1900 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1902 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
1904 hci_req_sync_unlock(hdev);
1908 int hci_dev_reset(__u16 dev)
1910 struct hci_dev *hdev;
1913 hdev = hci_dev_get(dev);
1917 if (!test_bit(HCI_UP, &hdev->flags)) {
1922 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1927 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1932 err = hci_dev_do_reset(hdev);
1939 int hci_dev_reset_stat(__u16 dev)
1941 struct hci_dev *hdev;
1944 hdev = hci_dev_get(dev);
1948 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1953 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1958 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1965 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1967 bool conn_changed, discov_changed;
1969 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1971 if ((scan & SCAN_PAGE))
1972 conn_changed = !hci_dev_test_and_set_flag(hdev,
1975 conn_changed = hci_dev_test_and_clear_flag(hdev,
1978 if ((scan & SCAN_INQUIRY)) {
1979 discov_changed = !hci_dev_test_and_set_flag(hdev,
1982 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1983 discov_changed = hci_dev_test_and_clear_flag(hdev,
1987 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1990 if (conn_changed || discov_changed) {
1991 /* In case this was disabled through mgmt */
1992 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1994 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1995 hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1997 mgmt_new_settings(hdev);
2001 int hci_dev_cmd(unsigned int cmd, void __user *arg)
2003 struct hci_dev *hdev;
2004 struct hci_dev_req dr;
2007 if (copy_from_user(&dr, arg, sizeof(dr)))
2010 hdev = hci_dev_get(dr.dev_id);
2014 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
2019 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
2024 if (hdev->dev_type != HCI_PRIMARY) {
2029 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
2036 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2037 HCI_INIT_TIMEOUT, NULL);
2041 if (!lmp_encrypt_capable(hdev)) {
2046 if (!test_bit(HCI_AUTH, &hdev->flags)) {
2047 /* Auth must be enabled first */
2048 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
2049 HCI_INIT_TIMEOUT, NULL);
2054 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
2055 HCI_INIT_TIMEOUT, NULL);
2059 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
2060 HCI_INIT_TIMEOUT, NULL);
2062 /* Ensure that the connectable and discoverable states
2063 * get correctly modified as this was a non-mgmt change.
2066 hci_update_scan_state(hdev, dr.dev_opt);
2070 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2071 HCI_INIT_TIMEOUT, NULL);
2074 case HCISETLINKMODE:
2075 hdev->link_mode = ((__u16) dr.dev_opt) &
2076 (HCI_LM_MASTER | HCI_LM_ACCEPT);
2080 if (hdev->pkt_type == (__u16) dr.dev_opt)
2083 hdev->pkt_type = (__u16) dr.dev_opt;
2084 mgmt_phy_configuration_changed(hdev, NULL);
2088 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
2089 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
2093 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
2094 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
2107 int hci_get_dev_list(void __user *arg)
2109 struct hci_dev *hdev;
2110 struct hci_dev_list_req *dl;
2111 struct hci_dev_req *dr;
2112 int n = 0, size, err;
2115 if (get_user(dev_num, (__u16 __user *) arg))
2118 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
2121 size = sizeof(*dl) + dev_num * sizeof(*dr);
2123 dl = kzalloc(size, GFP_KERNEL);
2129 read_lock(&hci_dev_list_lock);
2130 list_for_each_entry(hdev, &hci_dev_list, list) {
2131 unsigned long flags = hdev->flags;
2133 /* When the auto-off is configured it means the transport
2134 * is running, but in that case still indicate that the
2135 * device is actually down.
2137 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2138 flags &= ~BIT(HCI_UP);
2140 (dr + n)->dev_id = hdev->id;
2141 (dr + n)->dev_opt = flags;
2146 read_unlock(&hci_dev_list_lock);
2149 size = sizeof(*dl) + n * sizeof(*dr);
2151 err = copy_to_user(arg, dl, size);
2154 return err ? -EFAULT : 0;
2157 int hci_get_dev_info(void __user *arg)
2159 struct hci_dev *hdev;
2160 struct hci_dev_info di;
2161 unsigned long flags;
2164 if (copy_from_user(&di, arg, sizeof(di)))
2167 hdev = hci_dev_get(di.dev_id);
2171 /* When the auto-off is configured it means the transport
2172 * is running, but in that case still indicate that the
2173 * device is actually down.
2175 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2176 flags = hdev->flags & ~BIT(HCI_UP);
2178 flags = hdev->flags;
2180 strcpy(di.name, hdev->name);
2181 di.bdaddr = hdev->bdaddr;
2182 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2184 di.pkt_type = hdev->pkt_type;
2185 if (lmp_bredr_capable(hdev)) {
2186 di.acl_mtu = hdev->acl_mtu;
2187 di.acl_pkts = hdev->acl_pkts;
2188 di.sco_mtu = hdev->sco_mtu;
2189 di.sco_pkts = hdev->sco_pkts;
2191 di.acl_mtu = hdev->le_mtu;
2192 di.acl_pkts = hdev->le_pkts;
2196 di.link_policy = hdev->link_policy;
2197 di.link_mode = hdev->link_mode;
2199 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2200 memcpy(&di.features, &hdev->features, sizeof(di.features));
2202 if (copy_to_user(arg, &di, sizeof(di)))
2210 /* ---- Interface to HCI drivers ---- */
2212 static int hci_rfkill_set_block(void *data, bool blocked)
2214 struct hci_dev *hdev = data;
2216 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2218 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2222 hci_dev_set_flag(hdev, HCI_RFKILLED);
2223 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2224 !hci_dev_test_flag(hdev, HCI_CONFIG))
2225 hci_dev_do_close(hdev);
2227 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2233 static const struct rfkill_ops hci_rfkill_ops = {
2234 .set_block = hci_rfkill_set_block,
2237 static void hci_power_on(struct work_struct *work)
2239 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2242 BT_DBG("%s", hdev->name);
2244 if (test_bit(HCI_UP, &hdev->flags) &&
2245 hci_dev_test_flag(hdev, HCI_MGMT) &&
2246 hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2247 cancel_delayed_work(&hdev->power_off);
2248 hci_req_sync_lock(hdev);
2249 err = __hci_req_hci_power_on(hdev);
2250 hci_req_sync_unlock(hdev);
2251 mgmt_power_on(hdev, err);
2255 err = hci_dev_do_open(hdev);
2258 mgmt_set_powered_failed(hdev, err);
2259 hci_dev_unlock(hdev);
2263 /* During the HCI setup phase, a few error conditions are
2264 * ignored and they need to be checked now. If they are still
2265 * valid, it is important to turn the device back off.
2267 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2268 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2269 (hdev->dev_type == HCI_PRIMARY &&
2270 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2271 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2272 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2273 hci_dev_do_close(hdev);
2274 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2275 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2276 HCI_AUTO_OFF_TIMEOUT);
2279 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2280 /* For unconfigured devices, set the HCI_RAW flag
2281 * so that userspace can easily identify them.
2283 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2284 set_bit(HCI_RAW, &hdev->flags);
2286 /* For fully configured devices, this will send
2287 * the Index Added event. For unconfigured devices,
2288 * it will send Unconfigued Index Added event.
2290 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2291 * and no event will be send.
2293 mgmt_index_added(hdev);
2294 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2295 /* When the controller is now configured, then it
2296 * is important to clear the HCI_RAW flag.
2298 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2299 clear_bit(HCI_RAW, &hdev->flags);
2301 /* Powering on the controller with HCI_CONFIG set only
2302 * happens with the transition from unconfigured to
2303 * configured. This will send the Index Added event.
2305 mgmt_index_added(hdev);
2309 static void hci_power_off(struct work_struct *work)
2311 struct hci_dev *hdev = container_of(work, struct hci_dev,
2314 BT_DBG("%s", hdev->name);
2316 hci_dev_do_close(hdev);
2319 static void hci_error_reset(struct work_struct *work)
2321 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2323 BT_DBG("%s", hdev->name);
2326 hdev->hw_error(hdev, hdev->hw_error_code);
2328 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2330 if (hci_dev_do_close(hdev))
2333 hci_dev_do_open(hdev);
2336 void hci_uuids_clear(struct hci_dev *hdev)
2338 struct bt_uuid *uuid, *tmp;
2340 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2341 list_del(&uuid->list);
2346 void hci_link_keys_clear(struct hci_dev *hdev)
2348 struct link_key *key;
2350 list_for_each_entry(key, &hdev->link_keys, list) {
2351 list_del_rcu(&key->list);
2352 kfree_rcu(key, rcu);
2356 void hci_smp_ltks_clear(struct hci_dev *hdev)
2360 list_for_each_entry(k, &hdev->long_term_keys, list) {
2361 list_del_rcu(&k->list);
2366 void hci_smp_irks_clear(struct hci_dev *hdev)
2370 list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
2371 list_del_rcu(&k->list);
2376 void hci_blocked_keys_clear(struct hci_dev *hdev)
2378 struct blocked_key *b;
2380 list_for_each_entry(b, &hdev->blocked_keys, list) {
2381 list_del_rcu(&b->list);
2386 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
2388 bool blocked = false;
2389 struct blocked_key *b;
2392 list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
2393 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
2403 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2408 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2409 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2412 if (hci_is_blocked_key(hdev,
2413 HCI_BLOCKED_KEY_TYPE_LINKKEY,
2415 bt_dev_warn_ratelimited(hdev,
2416 "Link key blocked for %pMR",
2429 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2430 u8 key_type, u8 old_key_type)
2433 if (key_type < 0x03)
2436 /* Debug keys are insecure so don't store them persistently */
2437 if (key_type == HCI_LK_DEBUG_COMBINATION)
2440 /* Changed combination key and there's no previous one */
2441 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2444 /* Security mode 3 case */
2448 /* BR/EDR key derived using SC from an LE link */
2449 if (conn->type == LE_LINK)
2452 /* Neither local nor remote side had no-bonding as requirement */
2453 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2456 /* Local side had dedicated bonding as requirement */
2457 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2460 /* Remote side had dedicated bonding as requirement */
2461 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2464 /* If none of the above criteria match, then don't store the key
2469 static u8 ltk_role(u8 type)
2471 if (type == SMP_LTK)
2472 return HCI_ROLE_MASTER;
2474 return HCI_ROLE_SLAVE;
2477 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2478 u8 addr_type, u8 role)
2483 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2484 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2487 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2490 if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
2492 bt_dev_warn_ratelimited(hdev,
2493 "LTK blocked for %pMR",
2506 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2508 struct smp_irk *irk_to_return = NULL;
2509 struct smp_irk *irk;
2512 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2513 if (!bacmp(&irk->rpa, rpa)) {
2514 irk_to_return = irk;
2519 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2520 if (smp_irk_matches(hdev, irk->val, rpa)) {
2521 bacpy(&irk->rpa, rpa);
2522 irk_to_return = irk;
2528 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2529 irk_to_return->val)) {
2530 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2531 &irk_to_return->bdaddr);
2532 irk_to_return = NULL;
2537 return irk_to_return;
2540 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2543 struct smp_irk *irk_to_return = NULL;
2544 struct smp_irk *irk;
2546 /* Identity Address must be public or static random */
2547 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2551 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2552 if (addr_type == irk->addr_type &&
2553 bacmp(bdaddr, &irk->bdaddr) == 0) {
2554 irk_to_return = irk;
2561 if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
2562 irk_to_return->val)) {
2563 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
2564 &irk_to_return->bdaddr);
2565 irk_to_return = NULL;
2570 return irk_to_return;
2573 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2574 bdaddr_t *bdaddr, u8 *val, u8 type,
2575 u8 pin_len, bool *persistent)
2577 struct link_key *key, *old_key;
2580 old_key = hci_find_link_key(hdev, bdaddr);
2582 old_key_type = old_key->type;
2585 old_key_type = conn ? conn->key_type : 0xff;
2586 key = kzalloc(sizeof(*key), GFP_KERNEL);
2589 list_add_rcu(&key->list, &hdev->link_keys);
2592 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2594 /* Some buggy controller combinations generate a changed
2595 * combination key for legacy pairing even when there's no
2597 if (type == HCI_LK_CHANGED_COMBINATION &&
2598 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2599 type = HCI_LK_COMBINATION;
2601 conn->key_type = type;
2604 bacpy(&key->bdaddr, bdaddr);
2605 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2606 key->pin_len = pin_len;
2608 if (type == HCI_LK_CHANGED_COMBINATION)
2609 key->type = old_key_type;
2614 *persistent = hci_persistent_key(hdev, conn, type,
2620 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2621 u8 addr_type, u8 type, u8 authenticated,
2622 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2624 struct smp_ltk *key, *old_key;
2625 u8 role = ltk_role(type);
2627 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2631 key = kzalloc(sizeof(*key), GFP_KERNEL);
2634 list_add_rcu(&key->list, &hdev->long_term_keys);
2637 bacpy(&key->bdaddr, bdaddr);
2638 key->bdaddr_type = addr_type;
2639 memcpy(key->val, tk, sizeof(key->val));
2640 key->authenticated = authenticated;
2643 key->enc_size = enc_size;
2649 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2650 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2652 struct smp_irk *irk;
2654 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2656 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2660 bacpy(&irk->bdaddr, bdaddr);
2661 irk->addr_type = addr_type;
2663 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2666 memcpy(irk->val, val, 16);
2667 bacpy(&irk->rpa, rpa);
2672 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2674 struct link_key *key;
2676 key = hci_find_link_key(hdev, bdaddr);
2680 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2682 list_del_rcu(&key->list);
2683 kfree_rcu(key, rcu);
2688 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2693 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2694 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2697 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2699 list_del_rcu(&k->list);
2704 return removed ? 0 : -ENOENT;
2707 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2711 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2712 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2715 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2717 list_del_rcu(&k->list);
2722 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2725 struct smp_irk *irk;
2728 if (type == BDADDR_BREDR) {
2729 if (hci_find_link_key(hdev, bdaddr))
2734 /* Convert to HCI addr type which struct smp_ltk uses */
2735 if (type == BDADDR_LE_PUBLIC)
2736 addr_type = ADDR_LE_DEV_PUBLIC;
2738 addr_type = ADDR_LE_DEV_RANDOM;
2740 irk = hci_get_irk(hdev, bdaddr, addr_type);
2742 bdaddr = &irk->bdaddr;
2743 addr_type = irk->addr_type;
2747 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2748 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2758 /* HCI command timer function */
2759 static void hci_cmd_timeout(struct work_struct *work)
2761 struct hci_dev *hdev = container_of(work, struct hci_dev,
2764 if (hdev->sent_cmd) {
2765 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2766 u16 opcode = __le16_to_cpu(sent->opcode);
2768 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2770 bt_dev_err(hdev, "command tx timeout");
2773 if (hdev->cmd_timeout)
2774 hdev->cmd_timeout(hdev);
2776 atomic_set(&hdev->cmd_cnt, 1);
2777 queue_work(hdev->workqueue, &hdev->cmd_work);
2780 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2781 bdaddr_t *bdaddr, u8 bdaddr_type)
2783 struct oob_data *data;
2785 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2786 if (bacmp(bdaddr, &data->bdaddr) != 0)
2788 if (data->bdaddr_type != bdaddr_type)
2796 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2799 struct oob_data *data;
2801 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2805 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2807 list_del(&data->list);
2813 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2815 struct oob_data *data, *n;
2817 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2818 list_del(&data->list);
2823 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2824 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2825 u8 *hash256, u8 *rand256)
2827 struct oob_data *data;
2829 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2831 data = kmalloc(sizeof(*data), GFP_KERNEL);
2835 bacpy(&data->bdaddr, bdaddr);
2836 data->bdaddr_type = bdaddr_type;
2837 list_add(&data->list, &hdev->remote_oob_data);
2840 if (hash192 && rand192) {
2841 memcpy(data->hash192, hash192, sizeof(data->hash192));
2842 memcpy(data->rand192, rand192, sizeof(data->rand192));
2843 if (hash256 && rand256)
2844 data->present = 0x03;
2846 memset(data->hash192, 0, sizeof(data->hash192));
2847 memset(data->rand192, 0, sizeof(data->rand192));
2848 if (hash256 && rand256)
2849 data->present = 0x02;
2851 data->present = 0x00;
2854 if (hash256 && rand256) {
2855 memcpy(data->hash256, hash256, sizeof(data->hash256));
2856 memcpy(data->rand256, rand256, sizeof(data->rand256));
2858 memset(data->hash256, 0, sizeof(data->hash256));
2859 memset(data->rand256, 0, sizeof(data->rand256));
2860 if (hash192 && rand192)
2861 data->present = 0x01;
2864 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2869 /* This function requires the caller holds hdev->lock */
2870 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
2872 struct adv_info *adv_instance;
2874 list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
2875 if (adv_instance->instance == instance)
2876 return adv_instance;
2882 /* This function requires the caller holds hdev->lock */
2883 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
2885 struct adv_info *cur_instance;
2887 cur_instance = hci_find_adv_instance(hdev, instance);
2891 if (cur_instance == list_last_entry(&hdev->adv_instances,
2892 struct adv_info, list))
2893 return list_first_entry(&hdev->adv_instances,
2894 struct adv_info, list);
2896 return list_next_entry(cur_instance, list);
2899 /* This function requires the caller holds hdev->lock */
2900 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
2902 struct adv_info *adv_instance;
2904 adv_instance = hci_find_adv_instance(hdev, instance);
2908 BT_DBG("%s removing %dMR", hdev->name, instance);
2910 if (hdev->cur_adv_instance == instance) {
2911 if (hdev->adv_instance_timeout) {
2912 cancel_delayed_work(&hdev->adv_instance_expire);
2913 hdev->adv_instance_timeout = 0;
2915 hdev->cur_adv_instance = 0x00;
2918 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2920 list_del(&adv_instance->list);
2921 kfree(adv_instance);
2923 hdev->adv_instance_cnt--;
2928 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
2930 struct adv_info *adv_instance, *n;
2932 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
2933 adv_instance->rpa_expired = rpa_expired;
2936 /* This function requires the caller holds hdev->lock */
2937 void hci_adv_instances_clear(struct hci_dev *hdev)
2939 struct adv_info *adv_instance, *n;
2941 if (hdev->adv_instance_timeout) {
2942 cancel_delayed_work(&hdev->adv_instance_expire);
2943 hdev->adv_instance_timeout = 0;
2946 list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2947 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2948 list_del(&adv_instance->list);
2949 kfree(adv_instance);
2952 hdev->adv_instance_cnt = 0;
2953 hdev->cur_adv_instance = 0x00;
2956 static void adv_instance_rpa_expired(struct work_struct *work)
2958 struct adv_info *adv_instance = container_of(work, struct adv_info,
2959 rpa_expired_cb.work);
2963 adv_instance->rpa_expired = true;
2966 /* This function requires the caller holds hdev->lock */
2967 int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
2968 u16 adv_data_len, u8 *adv_data,
2969 u16 scan_rsp_len, u8 *scan_rsp_data,
2970 u16 timeout, u16 duration, s8 tx_power,
2971 u32 min_interval, u32 max_interval)
2973 struct adv_info *adv_instance;
2975 adv_instance = hci_find_adv_instance(hdev, instance);
2977 memset(adv_instance->adv_data, 0,
2978 sizeof(adv_instance->adv_data));
2979 memset(adv_instance->scan_rsp_data, 0,
2980 sizeof(adv_instance->scan_rsp_data));
2982 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
2983 instance < 1 || instance > hdev->le_num_of_adv_sets)
2986 adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2990 adv_instance->pending = true;
2991 adv_instance->instance = instance;
2992 list_add(&adv_instance->list, &hdev->adv_instances);
2993 hdev->adv_instance_cnt++;
2996 adv_instance->flags = flags;
2997 adv_instance->adv_data_len = adv_data_len;
2998 adv_instance->scan_rsp_len = scan_rsp_len;
2999 adv_instance->min_interval = min_interval;
3000 adv_instance->max_interval = max_interval;
3001 adv_instance->tx_power = tx_power;
3004 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
3007 memcpy(adv_instance->scan_rsp_data,
3008 scan_rsp_data, scan_rsp_len);
3010 adv_instance->timeout = timeout;
3011 adv_instance->remaining_time = timeout;
3014 adv_instance->duration = hdev->def_multi_adv_rotation_duration;
3016 adv_instance->duration = duration;
3018 INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
3019 adv_instance_rpa_expired);
3021 BT_DBG("%s for %dMR", hdev->name, instance);
3026 /* This function requires the caller holds hdev->lock */
3027 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
3028 u16 adv_data_len, u8 *adv_data,
3029 u16 scan_rsp_len, u8 *scan_rsp_data)
3031 struct adv_info *adv_instance;
3033 adv_instance = hci_find_adv_instance(hdev, instance);
3035 /* If advertisement doesn't exist, we can't modify its data */
3040 memset(adv_instance->adv_data, 0,
3041 sizeof(adv_instance->adv_data));
3042 memcpy(adv_instance->adv_data, adv_data, adv_data_len);
3043 adv_instance->adv_data_len = adv_data_len;
3047 memset(adv_instance->scan_rsp_data, 0,
3048 sizeof(adv_instance->scan_rsp_data));
3049 memcpy(adv_instance->scan_rsp_data,
3050 scan_rsp_data, scan_rsp_len);
3051 adv_instance->scan_rsp_len = scan_rsp_len;
3057 /* This function requires the caller holds hdev->lock */
3058 void hci_adv_monitors_clear(struct hci_dev *hdev)
3060 struct adv_monitor *monitor;
3063 idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
3064 hci_free_adv_monitor(hdev, monitor);
3066 idr_destroy(&hdev->adv_monitors_idr);
3069 /* Frees the monitor structure and do some bookkeepings.
3070 * This function requires the caller holds hdev->lock.
3072 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
3074 struct adv_pattern *pattern;
3075 struct adv_pattern *tmp;
3080 list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
3081 list_del(&pattern->list);
3085 if (monitor->handle)
3086 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
3088 if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
3089 hdev->adv_monitors_cnt--;
3090 mgmt_adv_monitor_removed(hdev, monitor->handle);
3096 int hci_add_adv_patterns_monitor_complete(struct hci_dev *hdev, u8 status)
3098 return mgmt_add_adv_patterns_monitor_complete(hdev, status);
3101 int hci_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status)
3103 return mgmt_remove_adv_monitor_complete(hdev, status);
3106 /* Assigns handle to a monitor, and if offloading is supported and power is on,
3107 * also attempts to forward the request to the controller.
3108 * Returns true if request is forwarded (result is pending), false otherwise.
3109 * This function requires the caller holds hdev->lock.
3111 bool hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
3114 int min, max, handle;
3123 min = HCI_MIN_ADV_MONITOR_HANDLE;
3124 max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
3125 handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
3132 monitor->handle = handle;
3134 if (!hdev_is_powered(hdev))
3137 switch (hci_get_adv_monitor_offload_ext(hdev)) {
3138 case HCI_ADV_MONITOR_EXT_NONE:
3139 hci_update_background_scan(hdev);
3140 bt_dev_dbg(hdev, "%s add monitor status %d", hdev->name, *err);
3141 /* Message was not forwarded to controller - not an error */
3143 case HCI_ADV_MONITOR_EXT_MSFT:
3144 *err = msft_add_monitor_pattern(hdev, monitor);
3145 bt_dev_dbg(hdev, "%s add monitor msft status %d", hdev->name,
3153 /* Attempts to tell the controller and free the monitor. If somehow the
3154 * controller doesn't have a corresponding handle, remove anyway.
3155 * Returns true if request is forwarded (result is pending), false otherwise.
3156 * This function requires the caller holds hdev->lock.
3158 static bool hci_remove_adv_monitor(struct hci_dev *hdev,
3159 struct adv_monitor *monitor,
3160 u16 handle, int *err)
3164 switch (hci_get_adv_monitor_offload_ext(hdev)) {
3165 case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
3167 case HCI_ADV_MONITOR_EXT_MSFT:
3168 *err = msft_remove_monitor(hdev, monitor, handle);
3172 /* In case no matching handle registered, just free the monitor */
3173 if (*err == -ENOENT)
3179 if (*err == -ENOENT)
3180 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
3182 hci_free_adv_monitor(hdev, monitor);
3188 /* Returns true if request is forwarded (result is pending), false otherwise.
3189 * This function requires the caller holds hdev->lock.
3191 bool hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle, int *err)
3193 struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
3201 pending = hci_remove_adv_monitor(hdev, monitor, handle, err);
3202 if (!*err && !pending)
3203 hci_update_background_scan(hdev);
3205 bt_dev_dbg(hdev, "%s remove monitor handle %d, status %d, %spending",
3206 hdev->name, handle, *err, pending ? "" : "not ");
3211 /* Returns true if request is forwarded (result is pending), false otherwise.
3212 * This function requires the caller holds hdev->lock.
3214 bool hci_remove_all_adv_monitor(struct hci_dev *hdev, int *err)
3216 struct adv_monitor *monitor;
3217 int idr_next_id = 0;
3218 bool pending = false;
3219 bool update = false;
3223 while (!*err && !pending) {
3224 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
3228 pending = hci_remove_adv_monitor(hdev, monitor, 0, err);
3230 if (!*err && !pending)
3235 hci_update_background_scan(hdev);
3237 bt_dev_dbg(hdev, "%s remove all monitors status %d, %spending",
3238 hdev->name, *err, pending ? "" : "not ");
3243 /* This function requires the caller holds hdev->lock */
3244 bool hci_is_adv_monitoring(struct hci_dev *hdev)
3246 return !idr_is_empty(&hdev->adv_monitors_idr);
3249 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
3251 if (msft_monitor_supported(hdev))
3252 return HCI_ADV_MONITOR_EXT_MSFT;
3254 return HCI_ADV_MONITOR_EXT_NONE;
3257 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
3258 bdaddr_t *bdaddr, u8 type)
3260 struct bdaddr_list *b;
3262 list_for_each_entry(b, bdaddr_list, list) {
3263 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3270 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
3271 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
3274 struct bdaddr_list_with_irk *b;
3276 list_for_each_entry(b, bdaddr_list, list) {
3277 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3284 struct bdaddr_list_with_flags *
3285 hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
3286 bdaddr_t *bdaddr, u8 type)
3288 struct bdaddr_list_with_flags *b;
3290 list_for_each_entry(b, bdaddr_list, list) {
3291 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
3298 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
3300 struct bdaddr_list *b, *n;
3302 list_for_each_entry_safe(b, n, bdaddr_list, list) {
3308 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3310 struct bdaddr_list *entry;
3312 if (!bacmp(bdaddr, BDADDR_ANY))
3315 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3318 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3322 bacpy(&entry->bdaddr, bdaddr);
3323 entry->bdaddr_type = type;
3325 list_add(&entry->list, list);
3330 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3331 u8 type, u8 *peer_irk, u8 *local_irk)
3333 struct bdaddr_list_with_irk *entry;
3335 if (!bacmp(bdaddr, BDADDR_ANY))
3338 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3341 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3345 bacpy(&entry->bdaddr, bdaddr);
3346 entry->bdaddr_type = type;
3349 memcpy(entry->peer_irk, peer_irk, 16);
3352 memcpy(entry->local_irk, local_irk, 16);
3354 list_add(&entry->list, list);
3359 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
3362 struct bdaddr_list_with_flags *entry;
3364 if (!bacmp(bdaddr, BDADDR_ANY))
3367 if (hci_bdaddr_list_lookup(list, bdaddr, type))
3370 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3374 bacpy(&entry->bdaddr, bdaddr);
3375 entry->bdaddr_type = type;
3376 entry->current_flags = flags;
3378 list_add(&entry->list, list);
3383 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3385 struct bdaddr_list *entry;
3387 if (!bacmp(bdaddr, BDADDR_ANY)) {
3388 hci_bdaddr_list_clear(list);
3392 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
3396 list_del(&entry->list);
3402 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
3405 struct bdaddr_list_with_irk *entry;
3407 if (!bacmp(bdaddr, BDADDR_ANY)) {
3408 hci_bdaddr_list_clear(list);
3412 entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
3416 list_del(&entry->list);
3422 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
3425 struct bdaddr_list_with_flags *entry;
3427 if (!bacmp(bdaddr, BDADDR_ANY)) {
3428 hci_bdaddr_list_clear(list);
3432 entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
3436 list_del(&entry->list);
3442 /* This function requires the caller holds hdev->lock */
3443 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
3444 bdaddr_t *addr, u8 addr_type)
3446 struct hci_conn_params *params;
3448 list_for_each_entry(params, &hdev->le_conn_params, list) {
3449 if (bacmp(¶ms->addr, addr) == 0 &&
3450 params->addr_type == addr_type) {
3458 /* This function requires the caller holds hdev->lock */
3459 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
3460 bdaddr_t *addr, u8 addr_type)
3462 struct hci_conn_params *param;
3464 switch (addr_type) {
3465 case ADDR_LE_DEV_PUBLIC_RESOLVED:
3466 addr_type = ADDR_LE_DEV_PUBLIC;
3468 case ADDR_LE_DEV_RANDOM_RESOLVED:
3469 addr_type = ADDR_LE_DEV_RANDOM;
3473 list_for_each_entry(param, list, action) {
3474 if (bacmp(¶m->addr, addr) == 0 &&
3475 param->addr_type == addr_type)
3482 /* This function requires the caller holds hdev->lock */
3483 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
3484 bdaddr_t *addr, u8 addr_type)
3486 struct hci_conn_params *params;
3488 params = hci_conn_params_lookup(hdev, addr, addr_type);
3492 params = kzalloc(sizeof(*params), GFP_KERNEL);
3494 bt_dev_err(hdev, "out of memory");
3498 bacpy(¶ms->addr, addr);
3499 params->addr_type = addr_type;
3501 list_add(¶ms->list, &hdev->le_conn_params);
3502 INIT_LIST_HEAD(¶ms->action);
3504 params->conn_min_interval = hdev->le_conn_min_interval;
3505 params->conn_max_interval = hdev->le_conn_max_interval;
3506 params->conn_latency = hdev->le_conn_latency;
3507 params->supervision_timeout = hdev->le_supv_timeout;
3508 params->auto_connect = HCI_AUTO_CONN_DISABLED;
3510 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3515 static void hci_conn_params_free(struct hci_conn_params *params)
3518 hci_conn_drop(params->conn);
3519 hci_conn_put(params->conn);
3522 list_del(¶ms->action);
3523 list_del(¶ms->list);
3527 /* This function requires the caller holds hdev->lock */
3528 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
3530 struct hci_conn_params *params;
3532 params = hci_conn_params_lookup(hdev, addr, addr_type);
3536 hci_conn_params_free(params);
3538 hci_update_background_scan(hdev);
3540 BT_DBG("addr %pMR (type %u)", addr, addr_type);
3543 /* This function requires the caller holds hdev->lock */
3544 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3546 struct hci_conn_params *params, *tmp;
3548 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3549 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
3552 /* If trying to estabilish one time connection to disabled
3553 * device, leave the params, but mark them as just once.
3555 if (params->explicit_connect) {
3556 params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
3560 list_del(¶ms->list);
3564 BT_DBG("All LE disabled connection parameters were removed");
3567 /* This function requires the caller holds hdev->lock */
3568 static void hci_conn_params_clear_all(struct hci_dev *hdev)
3570 struct hci_conn_params *params, *tmp;
3572 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
3573 hci_conn_params_free(params);
3575 BT_DBG("All LE connection parameters were removed");
3578 /* Copy the Identity Address of the controller.
3580 * If the controller has a public BD_ADDR, then by default use that one.
3581 * If this is a LE only controller without a public address, default to
3582 * the static random address.
3584 * For debugging purposes it is possible to force controllers with a
3585 * public address to use the static random address instead.
3587 * In case BR/EDR has been disabled on a dual-mode controller and
3588 * userspace has configured a static address, then that address
3589 * becomes the identity address instead of the public BR/EDR address.
3591 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
3594 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3595 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3596 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3597 bacmp(&hdev->static_addr, BDADDR_ANY))) {
3598 bacpy(bdaddr, &hdev->static_addr);
3599 *bdaddr_type = ADDR_LE_DEV_RANDOM;
3601 bacpy(bdaddr, &hdev->bdaddr);
3602 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3606 static void hci_suspend_clear_tasks(struct hci_dev *hdev)
3610 for (i = 0; i < __SUSPEND_NUM_TASKS; i++)
3611 clear_bit(i, hdev->suspend_tasks);
3613 wake_up(&hdev->suspend_wait_q);
3616 static int hci_suspend_wait_event(struct hci_dev *hdev)
3619 (find_first_bit(hdev->suspend_tasks, __SUSPEND_NUM_TASKS) == \
3620 __SUSPEND_NUM_TASKS)
3623 int ret = wait_event_timeout(hdev->suspend_wait_q,
3624 WAKE_COND, SUSPEND_NOTIFIER_TIMEOUT);
3627 bt_dev_err(hdev, "Timed out waiting for suspend events");
3628 for (i = 0; i < __SUSPEND_NUM_TASKS; ++i) {
3629 if (test_bit(i, hdev->suspend_tasks))
3630 bt_dev_err(hdev, "Suspend timeout bit: %d", i);
3631 clear_bit(i, hdev->suspend_tasks);
3642 static void hci_prepare_suspend(struct work_struct *work)
3644 struct hci_dev *hdev =
3645 container_of(work, struct hci_dev, suspend_prepare);
3648 hci_req_prepare_suspend(hdev, hdev->suspend_state_next);
3649 hci_dev_unlock(hdev);
3652 static int hci_change_suspend_state(struct hci_dev *hdev,
3653 enum suspended_state next)
3655 hdev->suspend_state_next = next;
3656 set_bit(SUSPEND_PREPARE_NOTIFIER, hdev->suspend_tasks);
3657 queue_work(hdev->req_workqueue, &hdev->suspend_prepare);
3658 return hci_suspend_wait_event(hdev);
3661 static void hci_clear_wake_reason(struct hci_dev *hdev)
3665 hdev->wake_reason = 0;
3666 bacpy(&hdev->wake_addr, BDADDR_ANY);
3667 hdev->wake_addr_type = 0;
3669 hci_dev_unlock(hdev);
3672 static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
3675 struct hci_dev *hdev =
3676 container_of(nb, struct hci_dev, suspend_notifier);
3678 u8 state = BT_RUNNING;
3680 /* If powering down, wait for completion. */
3681 if (mgmt_powering_down(hdev)) {
3682 set_bit(SUSPEND_POWERING_DOWN, hdev->suspend_tasks);
3683 ret = hci_suspend_wait_event(hdev);
3688 /* Suspend notifier should only act on events when powered. */
3689 if (!hdev_is_powered(hdev) ||
3690 hci_dev_test_flag(hdev, HCI_UNREGISTER))
3693 if (action == PM_SUSPEND_PREPARE) {
3694 /* Suspend consists of two actions:
3695 * - First, disconnect everything and make the controller not
3696 * connectable (disabling scanning)
3697 * - Second, program event filter/whitelist and enable scan
3699 ret = hci_change_suspend_state(hdev, BT_SUSPEND_DISCONNECT);
3701 state = BT_SUSPEND_DISCONNECT;
3703 /* Only configure whitelist if disconnect succeeded and wake
3704 * isn't being prevented.
3706 if (!ret && !(hdev->prevent_wake && hdev->prevent_wake(hdev))) {
3707 ret = hci_change_suspend_state(hdev,
3708 BT_SUSPEND_CONFIGURE_WAKE);
3710 state = BT_SUSPEND_CONFIGURE_WAKE;
3713 hci_clear_wake_reason(hdev);
3714 mgmt_suspending(hdev, state);
3716 } else if (action == PM_POST_SUSPEND) {
3717 ret = hci_change_suspend_state(hdev, BT_RUNNING);
3719 mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
3720 hdev->wake_addr_type);
3724 /* We always allow suspend even if suspend preparation failed and
3725 * attempt to recover in resume.
3728 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
3734 /* Alloc HCI device */
3735 struct hci_dev *hci_alloc_dev(void)
3737 struct hci_dev *hdev;
3739 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3743 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3744 hdev->esco_type = (ESCO_HV1);
3745 hdev->link_mode = (HCI_LM_ACCEPT);
3746 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3747 hdev->io_capability = 0x03; /* No Input No Output */
3748 hdev->manufacturer = 0xffff; /* Default to internal use */
3749 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3750 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3751 hdev->adv_instance_cnt = 0;
3752 hdev->cur_adv_instance = 0x00;
3753 hdev->adv_instance_timeout = 0;
3755 hdev->advmon_allowlist_duration = 300;
3756 hdev->advmon_no_filter_duration = 500;
3757 hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */
3759 hdev->sniff_max_interval = 800;
3760 hdev->sniff_min_interval = 80;
3762 hdev->le_adv_channel_map = 0x07;
3763 hdev->le_adv_min_interval = 0x0800;
3764 hdev->le_adv_max_interval = 0x0800;
3765 hdev->le_scan_interval = 0x0060;
3766 hdev->le_scan_window = 0x0030;
3767 hdev->le_scan_int_suspend = 0x0400;
3768 hdev->le_scan_window_suspend = 0x0012;
3769 hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
3770 hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
3771 hdev->le_scan_int_adv_monitor = 0x0060;
3772 hdev->le_scan_window_adv_monitor = 0x0030;
3773 hdev->le_scan_int_connect = 0x0060;
3774 hdev->le_scan_window_connect = 0x0060;
3775 hdev->le_conn_min_interval = 0x0018;
3776 hdev->le_conn_max_interval = 0x0028;
3777 hdev->le_conn_latency = 0x0000;
3778 hdev->le_supv_timeout = 0x002a;
3779 hdev->le_def_tx_len = 0x001b;
3780 hdev->le_def_tx_time = 0x0148;
3781 hdev->le_max_tx_len = 0x001b;
3782 hdev->le_max_tx_time = 0x0148;
3783 hdev->le_max_rx_len = 0x001b;
3784 hdev->le_max_rx_time = 0x0148;
3785 hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
3786 hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3787 hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
3788 hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3789 hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
3790 hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
3791 hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
3792 hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
3793 hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
3795 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3796 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3797 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3798 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3799 hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
3800 hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
3802 /* default 1.28 sec page scan */
3803 hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
3804 hdev->def_page_scan_int = 0x0800;
3805 hdev->def_page_scan_window = 0x0012;
3807 mutex_init(&hdev->lock);
3808 mutex_init(&hdev->req_lock);
3810 INIT_LIST_HEAD(&hdev->mgmt_pending);
3811 INIT_LIST_HEAD(&hdev->blacklist);
3812 INIT_LIST_HEAD(&hdev->whitelist);
3813 INIT_LIST_HEAD(&hdev->uuids);
3814 INIT_LIST_HEAD(&hdev->link_keys);
3815 INIT_LIST_HEAD(&hdev->long_term_keys);
3816 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3817 INIT_LIST_HEAD(&hdev->remote_oob_data);
3818 INIT_LIST_HEAD(&hdev->le_white_list);
3819 INIT_LIST_HEAD(&hdev->le_resolv_list);
3820 INIT_LIST_HEAD(&hdev->le_conn_params);
3821 INIT_LIST_HEAD(&hdev->pend_le_conns);
3822 INIT_LIST_HEAD(&hdev->pend_le_reports);
3823 INIT_LIST_HEAD(&hdev->conn_hash.list);
3824 INIT_LIST_HEAD(&hdev->adv_instances);
3825 INIT_LIST_HEAD(&hdev->blocked_keys);
3827 INIT_WORK(&hdev->rx_work, hci_rx_work);
3828 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3829 INIT_WORK(&hdev->tx_work, hci_tx_work);
3830 INIT_WORK(&hdev->power_on, hci_power_on);
3831 INIT_WORK(&hdev->error_reset, hci_error_reset);
3832 INIT_WORK(&hdev->suspend_prepare, hci_prepare_suspend);
3834 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3836 skb_queue_head_init(&hdev->rx_q);
3837 skb_queue_head_init(&hdev->cmd_q);
3838 skb_queue_head_init(&hdev->raw_q);
3840 init_waitqueue_head(&hdev->req_wait_q);
3841 init_waitqueue_head(&hdev->suspend_wait_q);
3843 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3845 hci_request_setup(hdev);
3847 hci_init_sysfs(hdev);
3848 discovery_init(hdev);
3852 EXPORT_SYMBOL(hci_alloc_dev);
3854 /* Free HCI device */
3855 void hci_free_dev(struct hci_dev *hdev)
3857 /* will free via device release */
3858 put_device(&hdev->dev);
3860 EXPORT_SYMBOL(hci_free_dev);
3862 /* Register HCI device */
3863 int hci_register_dev(struct hci_dev *hdev)
3867 if (!hdev->open || !hdev->close || !hdev->send)
3870 /* Do not allow HCI_AMP devices to register at index 0,
3871 * so the index can be used as the AMP controller ID.
3873 switch (hdev->dev_type) {
3875 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3878 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3887 sprintf(hdev->name, "hci%d", id);
3890 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3892 hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3893 if (!hdev->workqueue) {
3898 hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
3900 if (!hdev->req_workqueue) {
3901 destroy_workqueue(hdev->workqueue);
3906 if (!IS_ERR_OR_NULL(bt_debugfs))
3907 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3909 dev_set_name(&hdev->dev, "%s", hdev->name);
3911 error = device_add(&hdev->dev);
3915 hci_leds_init(hdev);
3917 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3918 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3921 if (rfkill_register(hdev->rfkill) < 0) {
3922 rfkill_destroy(hdev->rfkill);
3923 hdev->rfkill = NULL;
3927 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3928 hci_dev_set_flag(hdev, HCI_RFKILLED);
3930 hci_dev_set_flag(hdev, HCI_SETUP);
3931 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3933 if (hdev->dev_type == HCI_PRIMARY) {
3934 /* Assume BR/EDR support until proven otherwise (such as
3935 * through reading supported features during init.
3937 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3940 write_lock(&hci_dev_list_lock);
3941 list_add(&hdev->list, &hci_dev_list);
3942 write_unlock(&hci_dev_list_lock);
3944 /* Devices that are marked for raw-only usage are unconfigured
3945 * and should not be included in normal operation.
3947 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3948 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3950 hci_sock_dev_event(hdev, HCI_DEV_REG);
3953 if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
3954 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
3955 error = register_pm_notifier(&hdev->suspend_notifier);
3960 queue_work(hdev->req_workqueue, &hdev->power_on);
3962 idr_init(&hdev->adv_monitors_idr);
3967 destroy_workqueue(hdev->workqueue);
3968 destroy_workqueue(hdev->req_workqueue);
3970 ida_simple_remove(&hci_index_ida, hdev->id);
3974 EXPORT_SYMBOL(hci_register_dev);
3976 /* Unregister HCI device */
3977 void hci_unregister_dev(struct hci_dev *hdev)
3981 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3983 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3987 write_lock(&hci_dev_list_lock);
3988 list_del(&hdev->list);
3989 write_unlock(&hci_dev_list_lock);
3991 cancel_work_sync(&hdev->power_on);
3993 if (!test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
3994 hci_suspend_clear_tasks(hdev);
3995 unregister_pm_notifier(&hdev->suspend_notifier);
3996 cancel_work_sync(&hdev->suspend_prepare);
3999 hci_dev_do_close(hdev);
4001 if (!test_bit(HCI_INIT, &hdev->flags) &&
4002 !hci_dev_test_flag(hdev, HCI_SETUP) &&
4003 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
4005 mgmt_index_removed(hdev);
4006 hci_dev_unlock(hdev);
4009 /* mgmt_index_removed should take care of emptying the
4011 BUG_ON(!list_empty(&hdev->mgmt_pending));
4013 hci_sock_dev_event(hdev, HCI_DEV_UNREG);
4016 rfkill_unregister(hdev->rfkill);
4017 rfkill_destroy(hdev->rfkill);
4020 device_del(&hdev->dev);
4022 debugfs_remove_recursive(hdev->debugfs);
4023 kfree_const(hdev->hw_info);
4024 kfree_const(hdev->fw_info);
4026 destroy_workqueue(hdev->workqueue);
4027 destroy_workqueue(hdev->req_workqueue);
4030 hci_bdaddr_list_clear(&hdev->blacklist);
4031 hci_bdaddr_list_clear(&hdev->whitelist);
4032 hci_uuids_clear(hdev);
4033 hci_link_keys_clear(hdev);
4034 hci_smp_ltks_clear(hdev);
4035 hci_smp_irks_clear(hdev);
4036 hci_remote_oob_data_clear(hdev);
4037 hci_adv_instances_clear(hdev);
4038 hci_adv_monitors_clear(hdev);
4039 hci_bdaddr_list_clear(&hdev->le_white_list);
4040 hci_bdaddr_list_clear(&hdev->le_resolv_list);
4041 hci_conn_params_clear_all(hdev);
4042 hci_discovery_filter_clear(hdev);
4043 hci_blocked_keys_clear(hdev);
4044 hci_dev_unlock(hdev);
4048 ida_simple_remove(&hci_index_ida, id);
4050 EXPORT_SYMBOL(hci_unregister_dev);
4052 /* Suspend HCI device */
4053 int hci_suspend_dev(struct hci_dev *hdev)
4055 hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
4058 EXPORT_SYMBOL(hci_suspend_dev);
4060 /* Resume HCI device */
4061 int hci_resume_dev(struct hci_dev *hdev)
4063 hci_sock_dev_event(hdev, HCI_DEV_RESUME);
4066 EXPORT_SYMBOL(hci_resume_dev);
4068 /* Reset HCI device */
4069 int hci_reset_dev(struct hci_dev *hdev)
4071 static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
4072 struct sk_buff *skb;
4074 skb = bt_skb_alloc(3, GFP_ATOMIC);
4078 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
4079 skb_put_data(skb, hw_err, 3);
4081 /* Send Hardware Error to upper stack */
4082 return hci_recv_frame(hdev, skb);
4084 EXPORT_SYMBOL(hci_reset_dev);
4086 /* Receive frame from HCI drivers */
4087 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
4089 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
4090 && !test_bit(HCI_INIT, &hdev->flags))) {
4095 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
4096 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
4097 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
4098 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
4104 bt_cb(skb)->incoming = 1;
4107 __net_timestamp(skb);
4109 skb_queue_tail(&hdev->rx_q, skb);
4110 queue_work(hdev->workqueue, &hdev->rx_work);
4114 EXPORT_SYMBOL(hci_recv_frame);
4116 /* Receive diagnostic message from HCI drivers */
4117 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
4119 /* Mark as diagnostic packet */
4120 hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
4123 __net_timestamp(skb);
4125 skb_queue_tail(&hdev->rx_q, skb);
4126 queue_work(hdev->workqueue, &hdev->rx_work);
4130 EXPORT_SYMBOL(hci_recv_diag);
4132 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
4136 va_start(vargs, fmt);
4137 kfree_const(hdev->hw_info);
4138 hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
4141 EXPORT_SYMBOL(hci_set_hw_info);
4143 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
4147 va_start(vargs, fmt);
4148 kfree_const(hdev->fw_info);
4149 hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
4152 EXPORT_SYMBOL(hci_set_fw_info);
4154 /* ---- Interface to upper protocols ---- */
4156 int hci_register_cb(struct hci_cb *cb)
4158 BT_DBG("%p name %s", cb, cb->name);
4160 mutex_lock(&hci_cb_list_lock);
4161 list_add_tail(&cb->list, &hci_cb_list);
4162 mutex_unlock(&hci_cb_list_lock);
4166 EXPORT_SYMBOL(hci_register_cb);
4168 int hci_unregister_cb(struct hci_cb *cb)
4170 BT_DBG("%p name %s", cb, cb->name);
4172 mutex_lock(&hci_cb_list_lock);
4173 list_del(&cb->list);
4174 mutex_unlock(&hci_cb_list_lock);
4178 EXPORT_SYMBOL(hci_unregister_cb);
4180 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
4184 BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
4188 __net_timestamp(skb);
4190 /* Send copy to monitor */
4191 hci_send_to_monitor(hdev, skb);
4193 if (atomic_read(&hdev->promisc)) {
4194 /* Send copy to the sockets */
4195 hci_send_to_sock(hdev, skb);
4198 /* Get rid of skb owner, prior to sending to the driver. */
4201 if (!test_bit(HCI_RUNNING, &hdev->flags)) {
4206 err = hdev->send(hdev, skb);
4208 bt_dev_err(hdev, "sending frame failed (%d)", err);
4213 /* Send HCI command */
4214 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
4217 struct sk_buff *skb;
4219 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
4221 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4223 bt_dev_err(hdev, "no memory for command");
4227 /* Stand-alone HCI commands must be flagged as
4228 * single-command requests.
4230 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
4232 skb_queue_tail(&hdev->cmd_q, skb);
4233 queue_work(hdev->workqueue, &hdev->cmd_work);
4238 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
4241 struct sk_buff *skb;
4243 if (hci_opcode_ogf(opcode) != 0x3f) {
4244 /* A controller receiving a command shall respond with either
4245 * a Command Status Event or a Command Complete Event.
4246 * Therefore, all standard HCI commands must be sent via the
4247 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
4248 * Some vendors do not comply with this rule for vendor-specific
4249 * commands and do not return any event. We want to support
4250 * unresponded commands for such cases only.
4252 bt_dev_err(hdev, "unresponded command not supported");
4256 skb = hci_prepare_cmd(hdev, opcode, plen, param);
4258 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
4263 hci_send_frame(hdev, skb);
4267 EXPORT_SYMBOL(__hci_cmd_send);
4269 /* Get data from the previously sent command */
4270 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
4272 struct hci_command_hdr *hdr;
4274 if (!hdev->sent_cmd)
4277 hdr = (void *) hdev->sent_cmd->data;
4279 if (hdr->opcode != cpu_to_le16(opcode))
4282 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
4284 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
4287 /* Send HCI command and wait for command commplete event */
4288 struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
4289 const void *param, u32 timeout)
4291 struct sk_buff *skb;
4293 if (!test_bit(HCI_UP, &hdev->flags))
4294 return ERR_PTR(-ENETDOWN);
4296 bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
4298 hci_req_sync_lock(hdev);
4299 skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
4300 hci_req_sync_unlock(hdev);
4304 EXPORT_SYMBOL(hci_cmd_sync);
4307 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
4309 struct hci_acl_hdr *hdr;
4312 skb_push(skb, HCI_ACL_HDR_SIZE);
4313 skb_reset_transport_header(skb);
4314 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
4315 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
4316 hdr->dlen = cpu_to_le16(len);
4319 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
4320 struct sk_buff *skb, __u16 flags)
4322 struct hci_conn *conn = chan->conn;
4323 struct hci_dev *hdev = conn->hdev;
4324 struct sk_buff *list;
4326 skb->len = skb_headlen(skb);
4329 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
4331 switch (hdev->dev_type) {
4333 hci_add_acl_hdr(skb, conn->handle, flags);
4336 hci_add_acl_hdr(skb, chan->handle, flags);
4339 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
4343 list = skb_shinfo(skb)->frag_list;
4345 /* Non fragmented */
4346 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
4348 skb_queue_tail(queue, skb);
4351 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4353 skb_shinfo(skb)->frag_list = NULL;
4355 /* Queue all fragments atomically. We need to use spin_lock_bh
4356 * here because of 6LoWPAN links, as there this function is
4357 * called from softirq and using normal spin lock could cause
4360 spin_lock_bh(&queue->lock);
4362 __skb_queue_tail(queue, skb);
4364 flags &= ~ACL_START;
4367 skb = list; list = list->next;
4369 hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
4370 hci_add_acl_hdr(skb, conn->handle, flags);
4372 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
4374 __skb_queue_tail(queue, skb);
4377 spin_unlock_bh(&queue->lock);
4381 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
4383 struct hci_dev *hdev = chan->conn->hdev;
4385 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
4387 hci_queue_acl(chan, &chan->data_q, skb, flags);
4389 queue_work(hdev->workqueue, &hdev->tx_work);
4393 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
4395 struct hci_dev *hdev = conn->hdev;
4396 struct hci_sco_hdr hdr;
4398 BT_DBG("%s len %d", hdev->name, skb->len);
4400 hdr.handle = cpu_to_le16(conn->handle);
4401 hdr.dlen = skb->len;
4403 skb_push(skb, HCI_SCO_HDR_SIZE);
4404 skb_reset_transport_header(skb);
4405 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
4407 hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
4409 skb_queue_tail(&conn->data_q, skb);
4410 queue_work(hdev->workqueue, &hdev->tx_work);
4413 /* ---- HCI TX task (outgoing data) ---- */
4415 /* HCI Connection scheduler */
4416 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
4419 struct hci_conn_hash *h = &hdev->conn_hash;
4420 struct hci_conn *conn = NULL, *c;
4421 unsigned int num = 0, min = ~0;
4423 /* We don't have to lock device here. Connections are always
4424 * added and removed with TX task disabled. */
4428 list_for_each_entry_rcu(c, &h->list, list) {
4429 if (c->type != type || skb_queue_empty(&c->data_q))
4432 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
4437 if (c->sent < min) {
4442 if (hci_conn_num(hdev, type) == num)
4451 switch (conn->type) {
4453 cnt = hdev->acl_cnt;
4457 cnt = hdev->sco_cnt;
4460 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4464 bt_dev_err(hdev, "unknown link type %d", conn->type);
4472 BT_DBG("conn %p quote %d", conn, *quote);
4476 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
4478 struct hci_conn_hash *h = &hdev->conn_hash;
4481 bt_dev_err(hdev, "link tx timeout");
4485 /* Kill stalled connections */
4486 list_for_each_entry_rcu(c, &h->list, list) {
4487 if (c->type == type && c->sent) {
4488 bt_dev_err(hdev, "killing stalled connection %pMR",
4490 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
4497 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
4500 struct hci_conn_hash *h = &hdev->conn_hash;
4501 struct hci_chan *chan = NULL;
4502 unsigned int num = 0, min = ~0, cur_prio = 0;
4503 struct hci_conn *conn;
4504 int cnt, q, conn_num = 0;
4506 BT_DBG("%s", hdev->name);
4510 list_for_each_entry_rcu(conn, &h->list, list) {
4511 struct hci_chan *tmp;
4513 if (conn->type != type)
4516 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4521 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
4522 struct sk_buff *skb;
4524 if (skb_queue_empty(&tmp->data_q))
4527 skb = skb_peek(&tmp->data_q);
4528 if (skb->priority < cur_prio)
4531 if (skb->priority > cur_prio) {
4534 cur_prio = skb->priority;
4539 if (conn->sent < min) {
4545 if (hci_conn_num(hdev, type) == conn_num)
4554 switch (chan->conn->type) {
4556 cnt = hdev->acl_cnt;
4559 cnt = hdev->block_cnt;
4563 cnt = hdev->sco_cnt;
4566 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
4570 bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
4575 BT_DBG("chan %p quote %d", chan, *quote);
4579 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
4581 struct hci_conn_hash *h = &hdev->conn_hash;
4582 struct hci_conn *conn;
4585 BT_DBG("%s", hdev->name);
4589 list_for_each_entry_rcu(conn, &h->list, list) {
4590 struct hci_chan *chan;
4592 if (conn->type != type)
4595 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
4600 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4601 struct sk_buff *skb;
4608 if (skb_queue_empty(&chan->data_q))
4611 skb = skb_peek(&chan->data_q);
4612 if (skb->priority >= HCI_PRIO_MAX - 1)
4615 skb->priority = HCI_PRIO_MAX - 1;
4617 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
4621 if (hci_conn_num(hdev, type) == num)
4629 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
4631 /* Calculate count of blocks used by this packet */
4632 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
4635 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4637 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4638 /* ACL tx timeout must be longer than maximum
4639 * link supervision timeout (40.9 seconds) */
4640 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4641 HCI_ACL_TX_TIMEOUT))
4642 hci_link_tx_to(hdev, ACL_LINK);
4647 static void hci_sched_sco(struct hci_dev *hdev)
4649 struct hci_conn *conn;
4650 struct sk_buff *skb;
4653 BT_DBG("%s", hdev->name);
4655 if (!hci_conn_num(hdev, SCO_LINK))
4658 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
4659 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4660 BT_DBG("skb %p len %d", skb, skb->len);
4661 hci_send_frame(hdev, skb);
4664 if (conn->sent == ~0)
4670 static void hci_sched_esco(struct hci_dev *hdev)
4672 struct hci_conn *conn;
4673 struct sk_buff *skb;
4676 BT_DBG("%s", hdev->name);
4678 if (!hci_conn_num(hdev, ESCO_LINK))
4681 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
4683 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
4684 BT_DBG("skb %p len %d", skb, skb->len);
4685 hci_send_frame(hdev, skb);
4688 if (conn->sent == ~0)
4694 static void hci_sched_acl_pkt(struct hci_dev *hdev)
4696 unsigned int cnt = hdev->acl_cnt;
4697 struct hci_chan *chan;
4698 struct sk_buff *skb;
4701 __check_timeout(hdev, cnt);
4703 while (hdev->acl_cnt &&
4704 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
4705 u32 priority = (skb_peek(&chan->data_q))->priority;
4706 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4707 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4708 skb->len, skb->priority);
4710 /* Stop if priority has changed */
4711 if (skb->priority < priority)
4714 skb = skb_dequeue(&chan->data_q);
4716 hci_conn_enter_active_mode(chan->conn,
4717 bt_cb(skb)->force_active);
4719 hci_send_frame(hdev, skb);
4720 hdev->acl_last_tx = jiffies;
4726 /* Send pending SCO packets right away */
4727 hci_sched_sco(hdev);
4728 hci_sched_esco(hdev);
4732 if (cnt != hdev->acl_cnt)
4733 hci_prio_recalculate(hdev, ACL_LINK);
4736 static void hci_sched_acl_blk(struct hci_dev *hdev)
4738 unsigned int cnt = hdev->block_cnt;
4739 struct hci_chan *chan;
4740 struct sk_buff *skb;
4744 __check_timeout(hdev, cnt);
4746 BT_DBG("%s", hdev->name);
4748 if (hdev->dev_type == HCI_AMP)
4753 while (hdev->block_cnt > 0 &&
4754 (chan = hci_chan_sent(hdev, type, "e))) {
4755 u32 priority = (skb_peek(&chan->data_q))->priority;
4756 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
4759 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4760 skb->len, skb->priority);
4762 /* Stop if priority has changed */
4763 if (skb->priority < priority)
4766 skb = skb_dequeue(&chan->data_q);
4768 blocks = __get_blocks(hdev, skb);
4769 if (blocks > hdev->block_cnt)
4772 hci_conn_enter_active_mode(chan->conn,
4773 bt_cb(skb)->force_active);
4775 hci_send_frame(hdev, skb);
4776 hdev->acl_last_tx = jiffies;
4778 hdev->block_cnt -= blocks;
4781 chan->sent += blocks;
4782 chan->conn->sent += blocks;
4786 if (cnt != hdev->block_cnt)
4787 hci_prio_recalculate(hdev, type);
4790 static void hci_sched_acl(struct hci_dev *hdev)
4792 BT_DBG("%s", hdev->name);
4794 /* No ACL link over BR/EDR controller */
4795 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4798 /* No AMP link over AMP controller */
4799 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4802 switch (hdev->flow_ctl_mode) {
4803 case HCI_FLOW_CTL_MODE_PACKET_BASED:
4804 hci_sched_acl_pkt(hdev);
4807 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
4808 hci_sched_acl_blk(hdev);
4813 static void hci_sched_le(struct hci_dev *hdev)
4815 struct hci_chan *chan;
4816 struct sk_buff *skb;
4817 int quote, cnt, tmp;
4819 BT_DBG("%s", hdev->name);
4821 if (!hci_conn_num(hdev, LE_LINK))
4824 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4826 __check_timeout(hdev, cnt);
4829 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
4830 u32 priority = (skb_peek(&chan->data_q))->priority;
4831 while (quote-- && (skb = skb_peek(&chan->data_q))) {
4832 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4833 skb->len, skb->priority);
4835 /* Stop if priority has changed */
4836 if (skb->priority < priority)
4839 skb = skb_dequeue(&chan->data_q);
4841 hci_send_frame(hdev, skb);
4842 hdev->le_last_tx = jiffies;
4848 /* Send pending SCO packets right away */
4849 hci_sched_sco(hdev);
4850 hci_sched_esco(hdev);
4857 hdev->acl_cnt = cnt;
4860 hci_prio_recalculate(hdev, LE_LINK);
4863 static void hci_tx_work(struct work_struct *work)
4865 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
4866 struct sk_buff *skb;
4868 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4869 hdev->sco_cnt, hdev->le_cnt);
4871 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4872 /* Schedule queues and send stuff to HCI driver */
4873 hci_sched_sco(hdev);
4874 hci_sched_esco(hdev);
4875 hci_sched_acl(hdev);
4879 /* Send next queued raw (unknown type) packet */
4880 while ((skb = skb_dequeue(&hdev->raw_q)))
4881 hci_send_frame(hdev, skb);
4884 /* ----- HCI RX task (incoming data processing) ----- */
4886 /* ACL data packet */
4887 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4889 struct hci_acl_hdr *hdr = (void *) skb->data;
4890 struct hci_conn *conn;
4891 __u16 handle, flags;
4893 skb_pull(skb, HCI_ACL_HDR_SIZE);
4895 handle = __le16_to_cpu(hdr->handle);
4896 flags = hci_flags(handle);
4897 handle = hci_handle(handle);
4899 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4902 hdev->stat.acl_rx++;
4905 conn = hci_conn_hash_lookup_handle(hdev, handle);
4906 hci_dev_unlock(hdev);
4909 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4911 /* Send to upper protocol */
4912 l2cap_recv_acldata(conn, skb, flags);
4915 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
4922 /* SCO data packet */
4923 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4925 struct hci_sco_hdr *hdr = (void *) skb->data;
4926 struct hci_conn *conn;
4927 __u16 handle, flags;
4929 skb_pull(skb, HCI_SCO_HDR_SIZE);
4931 handle = __le16_to_cpu(hdr->handle);
4932 flags = hci_flags(handle);
4933 handle = hci_handle(handle);
4935 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4938 hdev->stat.sco_rx++;
4941 conn = hci_conn_hash_lookup_handle(hdev, handle);
4942 hci_dev_unlock(hdev);
4945 /* Send to upper protocol */
4946 bt_cb(skb)->sco.pkt_status = flags & 0x03;
4947 sco_recv_scodata(conn, skb);
4950 bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
4957 static bool hci_req_is_complete(struct hci_dev *hdev)
4959 struct sk_buff *skb;
4961 skb = skb_peek(&hdev->cmd_q);
4965 return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4968 static void hci_resend_last(struct hci_dev *hdev)
4970 struct hci_command_hdr *sent;
4971 struct sk_buff *skb;
4974 if (!hdev->sent_cmd)
4977 sent = (void *) hdev->sent_cmd->data;
4978 opcode = __le16_to_cpu(sent->opcode);
4979 if (opcode == HCI_OP_RESET)
4982 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4986 skb_queue_head(&hdev->cmd_q, skb);
4987 queue_work(hdev->workqueue, &hdev->cmd_work);
4990 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4991 hci_req_complete_t *req_complete,
4992 hci_req_complete_skb_t *req_complete_skb)
4994 struct sk_buff *skb;
4995 unsigned long flags;
4997 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4999 /* If the completed command doesn't match the last one that was
5000 * sent we need to do special handling of it.
5002 if (!hci_sent_cmd_data(hdev, opcode)) {
5003 /* Some CSR based controllers generate a spontaneous
5004 * reset complete event during init and any pending
5005 * command will never be completed. In such a case we
5006 * need to resend whatever was the last sent
5009 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
5010 hci_resend_last(hdev);
5015 /* If we reach this point this event matches the last command sent */
5016 hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
5018 /* If the command succeeded and there's still more commands in
5019 * this request the request is not yet complete.
5021 if (!status && !hci_req_is_complete(hdev))
5024 /* If this was the last command in a request the complete
5025 * callback would be found in hdev->sent_cmd instead of the
5026 * command queue (hdev->cmd_q).
5028 if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
5029 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
5033 if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
5034 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
5038 /* Remove all pending commands belonging to this request */
5039 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
5040 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
5041 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
5042 __skb_queue_head(&hdev->cmd_q, skb);
5046 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
5047 *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
5049 *req_complete = bt_cb(skb)->hci.req_complete;
5052 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
5055 static void hci_rx_work(struct work_struct *work)
5057 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
5058 struct sk_buff *skb;
5060 BT_DBG("%s", hdev->name);
5062 while ((skb = skb_dequeue(&hdev->rx_q))) {
5063 /* Send copy to monitor */
5064 hci_send_to_monitor(hdev, skb);
5066 if (atomic_read(&hdev->promisc)) {
5067 /* Send copy to the sockets */
5068 hci_send_to_sock(hdev, skb);
5071 /* If the device has been opened in HCI_USER_CHANNEL,
5072 * the userspace has exclusive access to device.
5073 * When device is HCI_INIT, we still need to process
5074 * the data packets to the driver in order
5075 * to complete its setup().
5077 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
5078 !test_bit(HCI_INIT, &hdev->flags)) {
5083 if (test_bit(HCI_INIT, &hdev->flags)) {
5084 /* Don't process data packets in this states. */
5085 switch (hci_skb_pkt_type(skb)) {
5086 case HCI_ACLDATA_PKT:
5087 case HCI_SCODATA_PKT:
5088 case HCI_ISODATA_PKT:
5095 switch (hci_skb_pkt_type(skb)) {
5097 BT_DBG("%s Event packet", hdev->name);
5098 hci_event_packet(hdev, skb);
5101 case HCI_ACLDATA_PKT:
5102 BT_DBG("%s ACL data packet", hdev->name);
5103 hci_acldata_packet(hdev, skb);
5106 case HCI_SCODATA_PKT:
5107 BT_DBG("%s SCO data packet", hdev->name);
5108 hci_scodata_packet(hdev, skb);
5118 static void hci_cmd_work(struct work_struct *work)
5120 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
5121 struct sk_buff *skb;
5123 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
5124 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
5126 /* Send queued commands */
5127 if (atomic_read(&hdev->cmd_cnt)) {
5128 skb = skb_dequeue(&hdev->cmd_q);
5132 kfree_skb(hdev->sent_cmd);
5134 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
5135 if (hdev->sent_cmd) {
5136 if (hci_req_status_pend(hdev))
5137 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
5138 atomic_dec(&hdev->cmd_cnt);
5139 hci_send_frame(hdev, skb);
5140 if (test_bit(HCI_RESET, &hdev->flags))
5141 cancel_delayed_work(&hdev->cmd_timer);
5143 schedule_delayed_work(&hdev->cmd_timer,
5146 skb_queue_head(&hdev->cmd_q, skb);
5147 queue_work(hdev->workqueue, &hdev->cmd_work);