2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2011 ProFUSION Embedded Systems
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
26 /* Bluetooth HCI core. */
28 #include <linux/export.h>
29 #include <linux/idr.h>
30 #include <linux/rfkill.h>
31 #include <linux/debugfs.h>
32 #include <linux/crypto.h>
33 #include <asm/unaligned.h>
35 #include <net/bluetooth/bluetooth.h>
36 #include <net/bluetooth/hci_core.h>
37 #include <net/bluetooth/l2cap.h>
38 #include <net/bluetooth/mgmt.h>
40 #include "hci_request.h"
41 #include "hci_debugfs.h"
44 static void hci_rx_work(struct work_struct *work);
45 static void hci_cmd_work(struct work_struct *work);
46 static void hci_tx_work(struct work_struct *work);
49 LIST_HEAD(hci_dev_list);
50 DEFINE_RWLOCK(hci_dev_list_lock);
52 /* HCI callback list */
53 LIST_HEAD(hci_cb_list);
54 DEFINE_MUTEX(hci_cb_list_lock);
56 /* HCI ID Numbering */
57 static DEFINE_IDA(hci_index_ida);
59 /* ----- HCI requests ----- */
61 #define HCI_REQ_DONE 0
62 #define HCI_REQ_PEND 1
63 #define HCI_REQ_CANCELED 2
65 #define hci_req_lock(d) mutex_lock(&d->req_lock)
66 #define hci_req_unlock(d) mutex_unlock(&d->req_lock)
68 /* ---- HCI notifications ---- */
70 static void hci_notify(struct hci_dev *hdev, int event)
72 hci_sock_dev_event(hdev, event);
75 /* ---- HCI debugfs entries ---- */
77 static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
78 size_t count, loff_t *ppos)
80 struct hci_dev *hdev = file->private_data;
83 buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y': 'N';
86 return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
89 static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
90 size_t count, loff_t *ppos)
92 struct hci_dev *hdev = file->private_data;
95 size_t buf_size = min(count, (sizeof(buf)-1));
99 if (!test_bit(HCI_UP, &hdev->flags))
102 if (copy_from_user(buf, user_buf, buf_size))
105 buf[buf_size] = '\0';
106 if (strtobool(buf, &enable))
109 if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
114 skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
117 skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
119 hci_req_unlock(hdev);
124 err = -bt_to_errno(skb->data[0]);
130 hci_dev_change_flag(hdev, HCI_DUT_MODE);
135 static const struct file_operations dut_mode_fops = {
137 .read = dut_mode_read,
138 .write = dut_mode_write,
139 .llseek = default_llseek,
142 /* ---- HCI requests ---- */
144 static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
147 BT_DBG("%s result 0x%2.2x", hdev->name, result);
149 if (hdev->req_status == HCI_REQ_PEND) {
150 hdev->req_result = result;
151 hdev->req_status = HCI_REQ_DONE;
153 hdev->req_skb = skb_get(skb);
154 wake_up_interruptible(&hdev->req_wait_q);
158 static void hci_req_cancel(struct hci_dev *hdev, int err)
160 BT_DBG("%s err 0x%2.2x", hdev->name, err);
162 if (hdev->req_status == HCI_REQ_PEND) {
163 hdev->req_result = err;
164 hdev->req_status = HCI_REQ_CANCELED;
165 wake_up_interruptible(&hdev->req_wait_q);
169 struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
170 const void *param, u8 event, u32 timeout)
172 DECLARE_WAITQUEUE(wait, current);
173 struct hci_request req;
177 BT_DBG("%s", hdev->name);
179 hci_req_init(&req, hdev);
181 hci_req_add_ev(&req, opcode, plen, param, event);
183 hdev->req_status = HCI_REQ_PEND;
185 add_wait_queue(&hdev->req_wait_q, &wait);
186 set_current_state(TASK_INTERRUPTIBLE);
188 err = hci_req_run_skb(&req, hci_req_sync_complete);
190 remove_wait_queue(&hdev->req_wait_q, &wait);
191 set_current_state(TASK_RUNNING);
195 schedule_timeout(timeout);
197 remove_wait_queue(&hdev->req_wait_q, &wait);
199 if (signal_pending(current))
200 return ERR_PTR(-EINTR);
202 switch (hdev->req_status) {
204 err = -bt_to_errno(hdev->req_result);
207 case HCI_REQ_CANCELED:
208 err = -hdev->req_result;
216 hdev->req_status = hdev->req_result = 0;
218 hdev->req_skb = NULL;
220 BT_DBG("%s end: err %d", hdev->name, err);
228 return ERR_PTR(-ENODATA);
232 EXPORT_SYMBOL(__hci_cmd_sync_ev);
234 struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
235 const void *param, u32 timeout)
237 return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
239 EXPORT_SYMBOL(__hci_cmd_sync);
241 /* Execute request and wait for completion. */
242 static int __hci_req_sync(struct hci_dev *hdev,
243 void (*func)(struct hci_request *req,
245 unsigned long opt, __u32 timeout)
247 struct hci_request req;
248 DECLARE_WAITQUEUE(wait, current);
251 BT_DBG("%s start", hdev->name);
253 hci_req_init(&req, hdev);
255 hdev->req_status = HCI_REQ_PEND;
259 add_wait_queue(&hdev->req_wait_q, &wait);
260 set_current_state(TASK_INTERRUPTIBLE);
262 err = hci_req_run_skb(&req, hci_req_sync_complete);
264 hdev->req_status = 0;
266 remove_wait_queue(&hdev->req_wait_q, &wait);
267 set_current_state(TASK_RUNNING);
269 /* ENODATA means the HCI request command queue is empty.
270 * This can happen when a request with conditionals doesn't
271 * trigger any commands to be sent. This is normal behavior
272 * and should not trigger an error return.
280 schedule_timeout(timeout);
282 remove_wait_queue(&hdev->req_wait_q, &wait);
284 if (signal_pending(current))
287 switch (hdev->req_status) {
289 err = -bt_to_errno(hdev->req_result);
292 case HCI_REQ_CANCELED:
293 err = -hdev->req_result;
301 hdev->req_status = hdev->req_result = 0;
303 BT_DBG("%s end: err %d", hdev->name, err);
308 static int hci_req_sync(struct hci_dev *hdev,
309 void (*req)(struct hci_request *req,
311 unsigned long opt, __u32 timeout)
315 if (!test_bit(HCI_UP, &hdev->flags))
318 /* Serialize all requests */
320 ret = __hci_req_sync(hdev, req, opt, timeout);
321 hci_req_unlock(hdev);
326 static void hci_reset_req(struct hci_request *req, unsigned long opt)
328 BT_DBG("%s %ld", req->hdev->name, opt);
331 set_bit(HCI_RESET, &req->hdev->flags);
332 hci_req_add(req, HCI_OP_RESET, 0, NULL);
335 static void bredr_init(struct hci_request *req)
337 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
339 /* Read Local Supported Features */
340 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
342 /* Read Local Version */
343 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
345 /* Read BD Address */
346 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
349 static void amp_init1(struct hci_request *req)
351 req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
353 /* Read Local Version */
354 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
356 /* Read Local Supported Commands */
357 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
359 /* Read Local AMP Info */
360 hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
362 /* Read Data Blk size */
363 hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
365 /* Read Flow Control Mode */
366 hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
368 /* Read Location Data */
369 hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
372 static void amp_init2(struct hci_request *req)
374 /* Read Local Supported Features. Not all AMP controllers
375 * support this so it's placed conditionally in the second
378 if (req->hdev->commands[14] & 0x20)
379 hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
382 static void hci_init1_req(struct hci_request *req, unsigned long opt)
384 struct hci_dev *hdev = req->hdev;
386 BT_DBG("%s %ld", hdev->name, opt);
389 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
390 hci_reset_req(req, 0);
392 switch (hdev->dev_type) {
402 BT_ERR("Unknown device type %d", hdev->dev_type);
407 static void bredr_setup(struct hci_request *req)
412 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
413 hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
415 /* Read Class of Device */
416 hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
418 /* Read Local Name */
419 hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
421 /* Read Voice Setting */
422 hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
424 /* Read Number of Supported IAC */
425 hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
427 /* Read Current IAC LAP */
428 hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
430 /* Clear Event Filters */
431 flt_type = HCI_FLT_CLEAR_ALL;
432 hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
434 /* Connection accept timeout ~20 secs */
435 param = cpu_to_le16(0x7d00);
436 hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
439 static void le_setup(struct hci_request *req)
441 struct hci_dev *hdev = req->hdev;
443 /* Read LE Buffer Size */
444 hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
446 /* Read LE Local Supported Features */
447 hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
449 /* Read LE Supported States */
450 hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
452 /* Read LE White List Size */
453 hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, 0, NULL);
455 /* Clear LE White List */
456 hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
458 /* LE-only controllers have LE implicitly enabled */
459 if (!lmp_bredr_capable(hdev))
460 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
463 static void hci_setup_event_mask(struct hci_request *req)
465 struct hci_dev *hdev = req->hdev;
467 /* The second byte is 0xff instead of 0x9f (two reserved bits
468 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
471 u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
473 /* CSR 1.1 dongles does not accept any bitfield so don't try to set
474 * any event mask for pre 1.2 devices.
476 if (hdev->hci_ver < BLUETOOTH_VER_1_2)
479 if (lmp_bredr_capable(hdev)) {
480 events[4] |= 0x01; /* Flow Specification Complete */
481 events[4] |= 0x02; /* Inquiry Result with RSSI */
482 events[4] |= 0x04; /* Read Remote Extended Features Complete */
483 events[5] |= 0x08; /* Synchronous Connection Complete */
484 events[5] |= 0x10; /* Synchronous Connection Changed */
486 /* Use a different default for LE-only devices */
487 memset(events, 0, sizeof(events));
488 events[0] |= 0x10; /* Disconnection Complete */
489 events[1] |= 0x08; /* Read Remote Version Information Complete */
490 events[1] |= 0x20; /* Command Complete */
491 events[1] |= 0x40; /* Command Status */
492 events[1] |= 0x80; /* Hardware Error */
493 events[2] |= 0x04; /* Number of Completed Packets */
494 events[3] |= 0x02; /* Data Buffer Overflow */
496 if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
497 events[0] |= 0x80; /* Encryption Change */
498 events[5] |= 0x80; /* Encryption Key Refresh Complete */
502 if (lmp_inq_rssi_capable(hdev))
503 events[4] |= 0x02; /* Inquiry Result with RSSI */
505 if (lmp_sniffsubr_capable(hdev))
506 events[5] |= 0x20; /* Sniff Subrating */
508 if (lmp_pause_enc_capable(hdev))
509 events[5] |= 0x80; /* Encryption Key Refresh Complete */
511 if (lmp_ext_inq_capable(hdev))
512 events[5] |= 0x40; /* Extended Inquiry Result */
514 if (lmp_no_flush_capable(hdev))
515 events[7] |= 0x01; /* Enhanced Flush Complete */
517 if (lmp_lsto_capable(hdev))
518 events[6] |= 0x80; /* Link Supervision Timeout Changed */
520 if (lmp_ssp_capable(hdev)) {
521 events[6] |= 0x01; /* IO Capability Request */
522 events[6] |= 0x02; /* IO Capability Response */
523 events[6] |= 0x04; /* User Confirmation Request */
524 events[6] |= 0x08; /* User Passkey Request */
525 events[6] |= 0x10; /* Remote OOB Data Request */
526 events[6] |= 0x20; /* Simple Pairing Complete */
527 events[7] |= 0x04; /* User Passkey Notification */
528 events[7] |= 0x08; /* Keypress Notification */
529 events[7] |= 0x10; /* Remote Host Supported
530 * Features Notification
534 if (lmp_le_capable(hdev))
535 events[7] |= 0x20; /* LE Meta-Event */
537 hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
540 static void hci_init2_req(struct hci_request *req, unsigned long opt)
542 struct hci_dev *hdev = req->hdev;
544 if (hdev->dev_type == HCI_AMP)
545 return amp_init2(req);
547 if (lmp_bredr_capable(hdev))
550 hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
552 if (lmp_le_capable(hdev))
555 /* All Bluetooth 1.2 and later controllers should support the
556 * HCI command for reading the local supported commands.
558 * Unfortunately some controllers indicate Bluetooth 1.2 support,
559 * but do not have support for this command. If that is the case,
560 * the driver can quirk the behavior and skip reading the local
561 * supported commands.
563 if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
564 !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
565 hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
567 if (lmp_ssp_capable(hdev)) {
568 /* When SSP is available, then the host features page
569 * should also be available as well. However some
570 * controllers list the max_page as 0 as long as SSP
571 * has not been enabled. To achieve proper debugging
572 * output, force the minimum max_page to 1 at least.
574 hdev->max_page = 0x01;
576 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
579 hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
580 sizeof(mode), &mode);
582 struct hci_cp_write_eir cp;
584 memset(hdev->eir, 0, sizeof(hdev->eir));
585 memset(&cp, 0, sizeof(cp));
587 hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
591 if (lmp_inq_rssi_capable(hdev) ||
592 test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
595 /* If Extended Inquiry Result events are supported, then
596 * they are clearly preferred over Inquiry Result with RSSI
599 mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
601 hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
604 if (lmp_inq_tx_pwr_capable(hdev))
605 hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
607 if (lmp_ext_feat_capable(hdev)) {
608 struct hci_cp_read_local_ext_features cp;
611 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
615 if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
617 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
622 static void hci_setup_link_policy(struct hci_request *req)
624 struct hci_dev *hdev = req->hdev;
625 struct hci_cp_write_def_link_policy cp;
628 if (lmp_rswitch_capable(hdev))
629 link_policy |= HCI_LP_RSWITCH;
630 if (lmp_hold_capable(hdev))
631 link_policy |= HCI_LP_HOLD;
632 if (lmp_sniff_capable(hdev))
633 link_policy |= HCI_LP_SNIFF;
634 if (lmp_park_capable(hdev))
635 link_policy |= HCI_LP_PARK;
637 cp.policy = cpu_to_le16(link_policy);
638 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
641 static void hci_set_le_support(struct hci_request *req)
643 struct hci_dev *hdev = req->hdev;
644 struct hci_cp_write_le_host_supported cp;
646 /* LE-only devices do not support explicit enablement */
647 if (!lmp_bredr_capable(hdev))
650 memset(&cp, 0, sizeof(cp));
652 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
657 if (cp.le != lmp_host_le_capable(hdev))
658 hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
662 static void hci_set_event_mask_page_2(struct hci_request *req)
664 struct hci_dev *hdev = req->hdev;
665 u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
667 /* If Connectionless Slave Broadcast master role is supported
668 * enable all necessary events for it.
670 if (lmp_csb_master_capable(hdev)) {
671 events[1] |= 0x40; /* Triggered Clock Capture */
672 events[1] |= 0x80; /* Synchronization Train Complete */
673 events[2] |= 0x10; /* Slave Page Response Timeout */
674 events[2] |= 0x20; /* CSB Channel Map Change */
677 /* If Connectionless Slave Broadcast slave role is supported
678 * enable all necessary events for it.
680 if (lmp_csb_slave_capable(hdev)) {
681 events[2] |= 0x01; /* Synchronization Train Received */
682 events[2] |= 0x02; /* CSB Receive */
683 events[2] |= 0x04; /* CSB Timeout */
684 events[2] |= 0x08; /* Truncated Page Complete */
687 /* Enable Authenticated Payload Timeout Expired event if supported */
688 if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
691 hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
694 static void hci_init3_req(struct hci_request *req, unsigned long opt)
696 struct hci_dev *hdev = req->hdev;
699 hci_setup_event_mask(req);
701 if (hdev->commands[6] & 0x20) {
702 struct hci_cp_read_stored_link_key cp;
704 bacpy(&cp.bdaddr, BDADDR_ANY);
706 hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
709 if (hdev->commands[5] & 0x10)
710 hci_setup_link_policy(req);
712 if (hdev->commands[8] & 0x01)
713 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
715 /* Some older Broadcom based Bluetooth 1.2 controllers do not
716 * support the Read Page Scan Type command. Check support for
717 * this command in the bit mask of supported commands.
719 if (hdev->commands[13] & 0x01)
720 hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
722 if (lmp_le_capable(hdev)) {
725 memset(events, 0, sizeof(events));
728 if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
729 events[0] |= 0x10; /* LE Long Term Key Request */
731 /* If controller supports the Connection Parameters Request
732 * Link Layer Procedure, enable the corresponding event.
734 if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
735 events[0] |= 0x20; /* LE Remote Connection
739 /* If the controller supports the Data Length Extension
740 * feature, enable the corresponding event.
742 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
743 events[0] |= 0x40; /* LE Data Length Change */
745 /* If the controller supports Extended Scanner Filter
746 * Policies, enable the correspondig event.
748 if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
749 events[1] |= 0x04; /* LE Direct Advertising
753 /* If the controller supports the LE Read Local P-256
754 * Public Key command, enable the corresponding event.
756 if (hdev->commands[34] & 0x02)
757 events[0] |= 0x80; /* LE Read Local P-256
758 * Public Key Complete
761 /* If the controller supports the LE Generate DHKey
762 * command, enable the corresponding event.
764 if (hdev->commands[34] & 0x04)
765 events[1] |= 0x01; /* LE Generate DHKey Complete */
767 hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
770 if (hdev->commands[25] & 0x40) {
771 /* Read LE Advertising Channel TX Power */
772 hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
775 if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
776 /* Read LE Maximum Data Length */
777 hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
779 /* Read LE Suggested Default Data Length */
780 hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
783 hci_set_le_support(req);
786 /* Read features beyond page 1 if available */
787 for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
788 struct hci_cp_read_local_ext_features cp;
791 hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
796 static void hci_init4_req(struct hci_request *req, unsigned long opt)
798 struct hci_dev *hdev = req->hdev;
800 /* Some Broadcom based Bluetooth controllers do not support the
801 * Delete Stored Link Key command. They are clearly indicating its
802 * absence in the bit mask of supported commands.
804 * Check the supported commands and only if the the command is marked
805 * as supported send it. If not supported assume that the controller
806 * does not have actual support for stored link keys which makes this
807 * command redundant anyway.
809 * Some controllers indicate that they support handling deleting
810 * stored link keys, but they don't. The quirk lets a driver
811 * just disable this command.
813 if (hdev->commands[6] & 0x80 &&
814 !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
815 struct hci_cp_delete_stored_link_key cp;
817 bacpy(&cp.bdaddr, BDADDR_ANY);
818 cp.delete_all = 0x01;
819 hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
823 /* Set event mask page 2 if the HCI command for it is supported */
824 if (hdev->commands[22] & 0x04)
825 hci_set_event_mask_page_2(req);
827 /* Read local codec list if the HCI command is supported */
828 if (hdev->commands[29] & 0x20)
829 hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
831 /* Get MWS transport configuration if the HCI command is supported */
832 if (hdev->commands[30] & 0x08)
833 hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
835 /* Check for Synchronization Train support */
836 if (lmp_sync_train_capable(hdev))
837 hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
839 /* Enable Secure Connections if supported and configured */
840 if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
841 bredr_sc_enabled(hdev)) {
844 hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
845 sizeof(support), &support);
849 static int __hci_init(struct hci_dev *hdev)
853 err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
857 /* The Device Under Test (DUT) mode is special and available for
858 * all controller types. So just create it early on.
860 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
861 debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
865 err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
869 /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
870 * BR/EDR/LE type controllers. AMP controllers only need the
871 * first two stages of init.
873 if (hdev->dev_type != HCI_BREDR)
876 err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
880 err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
884 /* This function is only called when the controller is actually in
885 * configured state. When the controller is marked as unconfigured,
886 * this initialization procedure is not run.
888 * It means that it is possible that a controller runs through its
889 * setup phase and then discovers missing settings. If that is the
890 * case, then this function will not be called. It then will only
891 * be called during the config phase.
893 * So only when in setup phase or config phase, create the debugfs
894 * entries and register the SMP channels.
896 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
897 !hci_dev_test_flag(hdev, HCI_CONFIG))
900 hci_debugfs_create_common(hdev);
902 if (lmp_bredr_capable(hdev))
903 hci_debugfs_create_bredr(hdev);
905 if (lmp_le_capable(hdev))
906 hci_debugfs_create_le(hdev);
911 static void hci_init0_req(struct hci_request *req, unsigned long opt)
913 struct hci_dev *hdev = req->hdev;
915 BT_DBG("%s %ld", hdev->name, opt);
918 if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
919 hci_reset_req(req, 0);
921 /* Read Local Version */
922 hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
924 /* Read BD Address */
925 if (hdev->set_bdaddr)
926 hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
929 static int __hci_unconf_init(struct hci_dev *hdev)
933 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
936 err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
943 static void hci_scan_req(struct hci_request *req, unsigned long opt)
947 BT_DBG("%s %x", req->hdev->name, scan);
949 /* Inquiry and Page scans */
950 hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
953 static void hci_auth_req(struct hci_request *req, unsigned long opt)
957 BT_DBG("%s %x", req->hdev->name, auth);
960 hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
963 static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
967 BT_DBG("%s %x", req->hdev->name, encrypt);
970 hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
973 static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
975 __le16 policy = cpu_to_le16(opt);
977 BT_DBG("%s %x", req->hdev->name, policy);
979 /* Default link policy */
980 hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
983 /* Get HCI device by index.
984 * Device is held on return. */
985 struct hci_dev *hci_dev_get(int index)
987 struct hci_dev *hdev = NULL, *d;
994 read_lock(&hci_dev_list_lock);
995 list_for_each_entry(d, &hci_dev_list, list) {
996 if (d->id == index) {
997 hdev = hci_dev_hold(d);
1001 read_unlock(&hci_dev_list_lock);
1005 /* ---- Inquiry support ---- */
1007 bool hci_discovery_active(struct hci_dev *hdev)
1009 struct discovery_state *discov = &hdev->discovery;
1011 switch (discov->state) {
1012 case DISCOVERY_FINDING:
1013 case DISCOVERY_RESOLVING:
1021 void hci_discovery_set_state(struct hci_dev *hdev, int state)
1023 int old_state = hdev->discovery.state;
1025 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
1027 if (old_state == state)
1030 hdev->discovery.state = state;
1033 case DISCOVERY_STOPPED:
1034 hci_update_background_scan(hdev);
1036 if (old_state != DISCOVERY_STARTING)
1037 mgmt_discovering(hdev, 0);
1039 case DISCOVERY_STARTING:
1041 case DISCOVERY_FINDING:
1042 mgmt_discovering(hdev, 1);
1044 case DISCOVERY_RESOLVING:
1046 case DISCOVERY_STOPPING:
1051 void hci_inquiry_cache_flush(struct hci_dev *hdev)
1053 struct discovery_state *cache = &hdev->discovery;
1054 struct inquiry_entry *p, *n;
1056 list_for_each_entry_safe(p, n, &cache->all, all) {
1061 INIT_LIST_HEAD(&cache->unknown);
1062 INIT_LIST_HEAD(&cache->resolve);
1065 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
1068 struct discovery_state *cache = &hdev->discovery;
1069 struct inquiry_entry *e;
1071 BT_DBG("cache %p, %pMR", cache, bdaddr);
1073 list_for_each_entry(e, &cache->all, all) {
1074 if (!bacmp(&e->data.bdaddr, bdaddr))
1081 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1084 struct discovery_state *cache = &hdev->discovery;
1085 struct inquiry_entry *e;
1087 BT_DBG("cache %p, %pMR", cache, bdaddr);
1089 list_for_each_entry(e, &cache->unknown, list) {
1090 if (!bacmp(&e->data.bdaddr, bdaddr))
1097 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1101 struct discovery_state *cache = &hdev->discovery;
1102 struct inquiry_entry *e;
1104 BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1106 list_for_each_entry(e, &cache->resolve, list) {
1107 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
1109 if (!bacmp(&e->data.bdaddr, bdaddr))
1116 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1117 struct inquiry_entry *ie)
1119 struct discovery_state *cache = &hdev->discovery;
1120 struct list_head *pos = &cache->resolve;
1121 struct inquiry_entry *p;
1123 list_del(&ie->list);
1125 list_for_each_entry(p, &cache->resolve, list) {
1126 if (p->name_state != NAME_PENDING &&
1127 abs(p->data.rssi) >= abs(ie->data.rssi))
1132 list_add(&ie->list, pos);
1135 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
1138 struct discovery_state *cache = &hdev->discovery;
1139 struct inquiry_entry *ie;
1142 BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
1144 hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1146 if (!data->ssp_mode)
1147 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1149 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1151 if (!ie->data.ssp_mode)
1152 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1154 if (ie->name_state == NAME_NEEDED &&
1155 data->rssi != ie->data.rssi) {
1156 ie->data.rssi = data->rssi;
1157 hci_inquiry_cache_update_resolve(hdev, ie);
1163 /* Entry not in the cache. Add new one. */
1164 ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1166 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1170 list_add(&ie->all, &cache->all);
1173 ie->name_state = NAME_KNOWN;
1175 ie->name_state = NAME_NOT_KNOWN;
1176 list_add(&ie->list, &cache->unknown);
1180 if (name_known && ie->name_state != NAME_KNOWN &&
1181 ie->name_state != NAME_PENDING) {
1182 ie->name_state = NAME_KNOWN;
1183 list_del(&ie->list);
1186 memcpy(&ie->data, data, sizeof(*data));
1187 ie->timestamp = jiffies;
1188 cache->timestamp = jiffies;
1190 if (ie->name_state == NAME_NOT_KNOWN)
1191 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1197 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
1199 struct discovery_state *cache = &hdev->discovery;
1200 struct inquiry_info *info = (struct inquiry_info *) buf;
1201 struct inquiry_entry *e;
1204 list_for_each_entry(e, &cache->all, all) {
1205 struct inquiry_data *data = &e->data;
1210 bacpy(&info->bdaddr, &data->bdaddr);
1211 info->pscan_rep_mode = data->pscan_rep_mode;
1212 info->pscan_period_mode = data->pscan_period_mode;
1213 info->pscan_mode = data->pscan_mode;
1214 memcpy(info->dev_class, data->dev_class, 3);
1215 info->clock_offset = data->clock_offset;
1221 BT_DBG("cache %p, copied %d", cache, copied);
1225 static void hci_inq_req(struct hci_request *req, unsigned long opt)
1227 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1228 struct hci_dev *hdev = req->hdev;
1229 struct hci_cp_inquiry cp;
1231 BT_DBG("%s", hdev->name);
1233 if (test_bit(HCI_INQUIRY, &hdev->flags))
1237 memcpy(&cp.lap, &ir->lap, 3);
1238 cp.length = ir->length;
1239 cp.num_rsp = ir->num_rsp;
1240 hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1243 int hci_inquiry(void __user *arg)
1245 __u8 __user *ptr = arg;
1246 struct hci_inquiry_req ir;
1247 struct hci_dev *hdev;
1248 int err = 0, do_inquiry = 0, max_rsp;
1252 if (copy_from_user(&ir, ptr, sizeof(ir)))
1255 hdev = hci_dev_get(ir.dev_id);
1259 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1264 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1269 if (hdev->dev_type != HCI_BREDR) {
1274 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1280 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1281 inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1282 hci_inquiry_cache_flush(hdev);
1285 hci_dev_unlock(hdev);
1287 timeo = ir.length * msecs_to_jiffies(2000);
1290 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1295 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
1296 * cleared). If it is interrupted by a signal, return -EINTR.
1298 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1299 TASK_INTERRUPTIBLE))
1303 /* for unlimited number of responses we will use buffer with
1306 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
1308 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
1309 * copy it to the user space.
1311 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
1318 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1319 hci_dev_unlock(hdev);
1321 BT_DBG("num_rsp %d", ir.num_rsp);
1323 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
1325 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1338 static int hci_dev_do_open(struct hci_dev *hdev)
1342 BT_DBG("%s %p", hdev->name, hdev);
1346 if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1351 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1352 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1353 /* Check for rfkill but allow the HCI setup stage to
1354 * proceed (which in itself doesn't cause any RF activity).
1356 if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1361 /* Check for valid public address or a configured static
1362 * random adddress, but let the HCI setup proceed to
1363 * be able to determine if there is a public address
1366 * In case of user channel usage, it is not important
1367 * if a public address or static random address is
1370 * This check is only valid for BR/EDR controllers
1371 * since AMP controllers do not have an address.
1373 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1374 hdev->dev_type == HCI_BREDR &&
1375 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1376 !bacmp(&hdev->static_addr, BDADDR_ANY)) {
1377 ret = -EADDRNOTAVAIL;
1382 if (test_bit(HCI_UP, &hdev->flags)) {
1387 if (hdev->open(hdev)) {
1392 atomic_set(&hdev->cmd_cnt, 1);
1393 set_bit(HCI_INIT, &hdev->flags);
1395 if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1397 ret = hdev->setup(hdev);
1399 /* The transport driver can set these quirks before
1400 * creating the HCI device or in its setup callback.
1402 * In case any of them is set, the controller has to
1403 * start up as unconfigured.
1405 if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1406 test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1407 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1409 /* For an unconfigured controller it is required to
1410 * read at least the version information provided by
1411 * the Read Local Version Information command.
1413 * If the set_bdaddr driver callback is provided, then
1414 * also the original Bluetooth public device address
1415 * will be read using the Read BD Address command.
1417 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1418 ret = __hci_unconf_init(hdev);
1421 if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1422 /* If public address change is configured, ensure that
1423 * the address gets programmed. If the driver does not
1424 * support changing the public address, fail the power
1427 if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1429 ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
1431 ret = -EADDRNOTAVAIL;
1435 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1436 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
1437 ret = __hci_init(hdev);
1440 clear_bit(HCI_INIT, &hdev->flags);
1444 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1445 set_bit(HCI_UP, &hdev->flags);
1446 hci_notify(hdev, HCI_DEV_UP);
1447 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
1448 !hci_dev_test_flag(hdev, HCI_CONFIG) &&
1449 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1450 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1451 hdev->dev_type == HCI_BREDR) {
1453 mgmt_powered(hdev, 1);
1454 hci_dev_unlock(hdev);
1457 /* Init failed, cleanup */
1458 flush_work(&hdev->tx_work);
1459 flush_work(&hdev->cmd_work);
1460 flush_work(&hdev->rx_work);
1462 skb_queue_purge(&hdev->cmd_q);
1463 skb_queue_purge(&hdev->rx_q);
1468 if (hdev->sent_cmd) {
1469 kfree_skb(hdev->sent_cmd);
1470 hdev->sent_cmd = NULL;
1474 hdev->flags &= BIT(HCI_RAW);
1478 hci_req_unlock(hdev);
1482 /* ---- HCI ioctl helpers ---- */
1484 int hci_dev_open(__u16 dev)
1486 struct hci_dev *hdev;
1489 hdev = hci_dev_get(dev);
1493 /* Devices that are marked as unconfigured can only be powered
1494 * up as user channel. Trying to bring them up as normal devices
1495 * will result into a failure. Only user channel operation is
1498 * When this function is called for a user channel, the flag
1499 * HCI_USER_CHANNEL will be set first before attempting to
1502 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1503 !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1508 /* We need to ensure that no other power on/off work is pending
1509 * before proceeding to call hci_dev_do_open. This is
1510 * particularly important if the setup procedure has not yet
1513 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1514 cancel_delayed_work(&hdev->power_off);
1516 /* After this call it is guaranteed that the setup procedure
1517 * has finished. This means that error conditions like RFKILL
1518 * or no valid public or static random address apply.
1520 flush_workqueue(hdev->req_workqueue);
1522 /* For controllers not using the management interface and that
1523 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1524 * so that pairing works for them. Once the management interface
1525 * is in use this bit will be cleared again and userspace has
1526 * to explicitly enable it.
1528 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1529 !hci_dev_test_flag(hdev, HCI_MGMT))
1530 hci_dev_set_flag(hdev, HCI_BONDABLE);
1532 err = hci_dev_do_open(hdev);
1539 /* This function requires the caller holds hdev->lock */
1540 static void hci_pend_le_actions_clear(struct hci_dev *hdev)
1542 struct hci_conn_params *p;
1544 list_for_each_entry(p, &hdev->le_conn_params, list) {
1546 hci_conn_drop(p->conn);
1547 hci_conn_put(p->conn);
1550 list_del_init(&p->action);
1553 BT_DBG("All LE pending actions cleared");
1556 static int hci_dev_do_close(struct hci_dev *hdev)
1558 BT_DBG("%s %p", hdev->name, hdev);
1560 if (!hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1561 /* Execute vendor specific shutdown routine */
1563 hdev->shutdown(hdev);
1566 cancel_delayed_work(&hdev->power_off);
1568 hci_req_cancel(hdev, ENODEV);
1571 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1572 cancel_delayed_work_sync(&hdev->cmd_timer);
1573 hci_req_unlock(hdev);
1577 /* Flush RX and TX works */
1578 flush_work(&hdev->tx_work);
1579 flush_work(&hdev->rx_work);
1581 if (hdev->discov_timeout > 0) {
1582 cancel_delayed_work(&hdev->discov_off);
1583 hdev->discov_timeout = 0;
1584 hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
1585 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1588 if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1589 cancel_delayed_work(&hdev->service_cache);
1591 cancel_delayed_work_sync(&hdev->le_scan_disable);
1592 cancel_delayed_work_sync(&hdev->le_scan_restart);
1594 if (hci_dev_test_flag(hdev, HCI_MGMT))
1595 cancel_delayed_work_sync(&hdev->rpa_expired);
1597 /* Avoid potential lockdep warnings from the *_flush() calls by
1598 * ensuring the workqueue is empty up front.
1600 drain_workqueue(hdev->workqueue);
1604 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1606 if (!hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
1607 if (hdev->dev_type == HCI_BREDR)
1608 mgmt_powered(hdev, 0);
1611 hci_inquiry_cache_flush(hdev);
1612 hci_pend_le_actions_clear(hdev);
1613 hci_conn_hash_flush(hdev);
1614 hci_dev_unlock(hdev);
1616 smp_unregister(hdev);
1618 hci_notify(hdev, HCI_DEV_DOWN);
1624 skb_queue_purge(&hdev->cmd_q);
1625 atomic_set(&hdev->cmd_cnt, 1);
1626 if (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1627 !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1628 test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks)) {
1629 set_bit(HCI_INIT, &hdev->flags);
1630 __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
1631 clear_bit(HCI_INIT, &hdev->flags);
1634 /* flush cmd work */
1635 flush_work(&hdev->cmd_work);
1638 skb_queue_purge(&hdev->rx_q);
1639 skb_queue_purge(&hdev->cmd_q);
1640 skb_queue_purge(&hdev->raw_q);
1642 /* Drop last sent command */
1643 if (hdev->sent_cmd) {
1644 cancel_delayed_work_sync(&hdev->cmd_timer);
1645 kfree_skb(hdev->sent_cmd);
1646 hdev->sent_cmd = NULL;
1649 /* After this point our queues are empty
1650 * and no tasks are scheduled. */
1654 hdev->flags &= BIT(HCI_RAW);
1655 hci_dev_clear_volatile_flags(hdev);
1657 /* Controller radio is available but is currently powered down */
1658 hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1660 memset(hdev->eir, 0, sizeof(hdev->eir));
1661 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1662 bacpy(&hdev->random_addr, BDADDR_ANY);
1664 hci_req_unlock(hdev);
1670 int hci_dev_close(__u16 dev)
1672 struct hci_dev *hdev;
1675 hdev = hci_dev_get(dev);
1679 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1684 if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1685 cancel_delayed_work(&hdev->power_off);
1687 err = hci_dev_do_close(hdev);
1694 static int hci_dev_do_reset(struct hci_dev *hdev)
1698 BT_DBG("%s %p", hdev->name, hdev);
1703 skb_queue_purge(&hdev->rx_q);
1704 skb_queue_purge(&hdev->cmd_q);
1706 /* Avoid potential lockdep warnings from the *_flush() calls by
1707 * ensuring the workqueue is empty up front.
1709 drain_workqueue(hdev->workqueue);
1712 hci_inquiry_cache_flush(hdev);
1713 hci_conn_hash_flush(hdev);
1714 hci_dev_unlock(hdev);
1719 atomic_set(&hdev->cmd_cnt, 1);
1720 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1722 ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
1724 hci_req_unlock(hdev);
1728 int hci_dev_reset(__u16 dev)
1730 struct hci_dev *hdev;
1733 hdev = hci_dev_get(dev);
1737 if (!test_bit(HCI_UP, &hdev->flags)) {
1742 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1747 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1752 err = hci_dev_do_reset(hdev);
1759 int hci_dev_reset_stat(__u16 dev)
1761 struct hci_dev *hdev;
1764 hdev = hci_dev_get(dev);
1768 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1773 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1778 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
1785 static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
1787 bool conn_changed, discov_changed;
1789 BT_DBG("%s scan 0x%02x", hdev->name, scan);
1791 if ((scan & SCAN_PAGE))
1792 conn_changed = !hci_dev_test_and_set_flag(hdev,
1795 conn_changed = hci_dev_test_and_clear_flag(hdev,
1798 if ((scan & SCAN_INQUIRY)) {
1799 discov_changed = !hci_dev_test_and_set_flag(hdev,
1802 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1803 discov_changed = hci_dev_test_and_clear_flag(hdev,
1807 if (!hci_dev_test_flag(hdev, HCI_MGMT))
1810 if (conn_changed || discov_changed) {
1811 /* In case this was disabled through mgmt */
1812 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1814 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1815 mgmt_update_adv_data(hdev);
1817 mgmt_new_settings(hdev);
1821 int hci_dev_cmd(unsigned int cmd, void __user *arg)
1823 struct hci_dev *hdev;
1824 struct hci_dev_req dr;
1827 if (copy_from_user(&dr, arg, sizeof(dr)))
1830 hdev = hci_dev_get(dr.dev_id);
1834 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1839 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1844 if (hdev->dev_type != HCI_BREDR) {
1849 if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1856 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1861 if (!lmp_encrypt_capable(hdev)) {
1866 if (!test_bit(HCI_AUTH, &hdev->flags)) {
1867 /* Auth must be enabled first */
1868 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1874 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1879 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1882 /* Ensure that the connectable and discoverable states
1883 * get correctly modified as this was a non-mgmt change.
1886 hci_update_scan_state(hdev, dr.dev_opt);
1890 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
1894 case HCISETLINKMODE:
1895 hdev->link_mode = ((__u16) dr.dev_opt) &
1896 (HCI_LM_MASTER | HCI_LM_ACCEPT);
1900 hdev->pkt_type = (__u16) dr.dev_opt;
1904 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
1905 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1909 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
1910 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1923 int hci_get_dev_list(void __user *arg)
1925 struct hci_dev *hdev;
1926 struct hci_dev_list_req *dl;
1927 struct hci_dev_req *dr;
1928 int n = 0, size, err;
1931 if (get_user(dev_num, (__u16 __user *) arg))
1934 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
1937 size = sizeof(*dl) + dev_num * sizeof(*dr);
1939 dl = kzalloc(size, GFP_KERNEL);
1945 read_lock(&hci_dev_list_lock);
1946 list_for_each_entry(hdev, &hci_dev_list, list) {
1947 unsigned long flags = hdev->flags;
1949 /* When the auto-off is configured it means the transport
1950 * is running, but in that case still indicate that the
1951 * device is actually down.
1953 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1954 flags &= ~BIT(HCI_UP);
1956 (dr + n)->dev_id = hdev->id;
1957 (dr + n)->dev_opt = flags;
1962 read_unlock(&hci_dev_list_lock);
1965 size = sizeof(*dl) + n * sizeof(*dr);
1967 err = copy_to_user(arg, dl, size);
1970 return err ? -EFAULT : 0;
1973 int hci_get_dev_info(void __user *arg)
1975 struct hci_dev *hdev;
1976 struct hci_dev_info di;
1977 unsigned long flags;
1980 if (copy_from_user(&di, arg, sizeof(di)))
1983 hdev = hci_dev_get(di.dev_id);
1987 /* When the auto-off is configured it means the transport
1988 * is running, but in that case still indicate that the
1989 * device is actually down.
1991 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
1992 flags = hdev->flags & ~BIT(HCI_UP);
1994 flags = hdev->flags;
1996 strcpy(di.name, hdev->name);
1997 di.bdaddr = hdev->bdaddr;
1998 di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2000 di.pkt_type = hdev->pkt_type;
2001 if (lmp_bredr_capable(hdev)) {
2002 di.acl_mtu = hdev->acl_mtu;
2003 di.acl_pkts = hdev->acl_pkts;
2004 di.sco_mtu = hdev->sco_mtu;
2005 di.sco_pkts = hdev->sco_pkts;
2007 di.acl_mtu = hdev->le_mtu;
2008 di.acl_pkts = hdev->le_pkts;
2012 di.link_policy = hdev->link_policy;
2013 di.link_mode = hdev->link_mode;
2015 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
2016 memcpy(&di.features, &hdev->features, sizeof(di.features));
2018 if (copy_to_user(arg, &di, sizeof(di)))
2026 /* ---- Interface to HCI drivers ---- */
2028 static int hci_rfkill_set_block(void *data, bool blocked)
2030 struct hci_dev *hdev = data;
2032 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
2034 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2038 hci_dev_set_flag(hdev, HCI_RFKILLED);
2039 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
2040 !hci_dev_test_flag(hdev, HCI_CONFIG))
2041 hci_dev_do_close(hdev);
2043 hci_dev_clear_flag(hdev, HCI_RFKILLED);
2049 static const struct rfkill_ops hci_rfkill_ops = {
2050 .set_block = hci_rfkill_set_block,
2053 static void hci_power_on(struct work_struct *work)
2055 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2058 BT_DBG("%s", hdev->name);
2060 err = hci_dev_do_open(hdev);
2063 mgmt_set_powered_failed(hdev, err);
2064 hci_dev_unlock(hdev);
2068 /* During the HCI setup phase, a few error conditions are
2069 * ignored and they need to be checked now. If they are still
2070 * valid, it is important to turn the device back off.
2072 if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
2073 hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2074 (hdev->dev_type == HCI_BREDR &&
2075 !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
2076 !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2077 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2078 hci_dev_do_close(hdev);
2079 } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2080 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
2081 HCI_AUTO_OFF_TIMEOUT);
2084 if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2085 /* For unconfigured devices, set the HCI_RAW flag
2086 * so that userspace can easily identify them.
2088 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2089 set_bit(HCI_RAW, &hdev->flags);
2091 /* For fully configured devices, this will send
2092 * the Index Added event. For unconfigured devices,
2093 * it will send Unconfigued Index Added event.
2095 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
2096 * and no event will be send.
2098 mgmt_index_added(hdev);
2099 } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2100 /* When the controller is now configured, then it
2101 * is important to clear the HCI_RAW flag.
2103 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2104 clear_bit(HCI_RAW, &hdev->flags);
2106 /* Powering on the controller with HCI_CONFIG set only
2107 * happens with the transition from unconfigured to
2108 * configured. This will send the Index Added event.
2110 mgmt_index_added(hdev);
2114 static void hci_power_off(struct work_struct *work)
2116 struct hci_dev *hdev = container_of(work, struct hci_dev,
2119 BT_DBG("%s", hdev->name);
2121 hci_dev_do_close(hdev);
2124 static void hci_error_reset(struct work_struct *work)
2126 struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
2128 BT_DBG("%s", hdev->name);
2131 hdev->hw_error(hdev, hdev->hw_error_code);
2133 BT_ERR("%s hardware error 0x%2.2x", hdev->name,
2134 hdev->hw_error_code);
2136 if (hci_dev_do_close(hdev))
2139 hci_dev_do_open(hdev);
2142 static void hci_discov_off(struct work_struct *work)
2144 struct hci_dev *hdev;
2146 hdev = container_of(work, struct hci_dev, discov_off.work);
2148 BT_DBG("%s", hdev->name);
2150 mgmt_discoverable_timeout(hdev);
2153 void hci_uuids_clear(struct hci_dev *hdev)
2155 struct bt_uuid *uuid, *tmp;
2157 list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
2158 list_del(&uuid->list);
2163 void hci_link_keys_clear(struct hci_dev *hdev)
2165 struct link_key *key;
2167 list_for_each_entry_rcu(key, &hdev->link_keys, list) {
2168 list_del_rcu(&key->list);
2169 kfree_rcu(key, rcu);
2173 void hci_smp_ltks_clear(struct hci_dev *hdev)
2177 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2178 list_del_rcu(&k->list);
2183 void hci_smp_irks_clear(struct hci_dev *hdev)
2187 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2188 list_del_rcu(&k->list);
2193 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2198 list_for_each_entry_rcu(k, &hdev->link_keys, list) {
2199 if (bacmp(bdaddr, &k->bdaddr) == 0) {
2209 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2210 u8 key_type, u8 old_key_type)
2213 if (key_type < 0x03)
2216 /* Debug keys are insecure so don't store them persistently */
2217 if (key_type == HCI_LK_DEBUG_COMBINATION)
2220 /* Changed combination key and there's no previous one */
2221 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2224 /* Security mode 3 case */
2228 /* BR/EDR key derived using SC from an LE link */
2229 if (conn->type == LE_LINK)
2232 /* Neither local nor remote side had no-bonding as requirement */
2233 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2236 /* Local side had dedicated bonding as requirement */
2237 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2240 /* Remote side had dedicated bonding as requirement */
2241 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2244 /* If none of the above criteria match, then don't store the key
2249 static u8 ltk_role(u8 type)
2251 if (type == SMP_LTK)
2252 return HCI_ROLE_MASTER;
2254 return HCI_ROLE_SLAVE;
2257 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2258 u8 addr_type, u8 role)
2263 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2264 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
2267 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2277 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
2279 struct smp_irk *irk;
2282 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2283 if (!bacmp(&irk->rpa, rpa)) {
2289 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2290 if (smp_irk_matches(hdev, irk->val, rpa)) {
2291 bacpy(&irk->rpa, rpa);
2301 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
2304 struct smp_irk *irk;
2306 /* Identity Address must be public or static random */
2307 if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
2311 list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2312 if (addr_type == irk->addr_type &&
2313 bacmp(bdaddr, &irk->bdaddr) == 0) {
2323 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2324 bdaddr_t *bdaddr, u8 *val, u8 type,
2325 u8 pin_len, bool *persistent)
2327 struct link_key *key, *old_key;
2330 old_key = hci_find_link_key(hdev, bdaddr);
2332 old_key_type = old_key->type;
2335 old_key_type = conn ? conn->key_type : 0xff;
2336 key = kzalloc(sizeof(*key), GFP_KERNEL);
2339 list_add_rcu(&key->list, &hdev->link_keys);
2342 BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2344 /* Some buggy controller combinations generate a changed
2345 * combination key for legacy pairing even when there's no
2347 if (type == HCI_LK_CHANGED_COMBINATION &&
2348 (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2349 type = HCI_LK_COMBINATION;
2351 conn->key_type = type;
2354 bacpy(&key->bdaddr, bdaddr);
2355 memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2356 key->pin_len = pin_len;
2358 if (type == HCI_LK_CHANGED_COMBINATION)
2359 key->type = old_key_type;
2364 *persistent = hci_persistent_key(hdev, conn, type,
2370 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2371 u8 addr_type, u8 type, u8 authenticated,
2372 u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2374 struct smp_ltk *key, *old_key;
2375 u8 role = ltk_role(type);
2377 old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2381 key = kzalloc(sizeof(*key), GFP_KERNEL);
2384 list_add_rcu(&key->list, &hdev->long_term_keys);
2387 bacpy(&key->bdaddr, bdaddr);
2388 key->bdaddr_type = addr_type;
2389 memcpy(key->val, tk, sizeof(key->val));
2390 key->authenticated = authenticated;
2393 key->enc_size = enc_size;
2399 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2400 u8 addr_type, u8 val[16], bdaddr_t *rpa)
2402 struct smp_irk *irk;
2404 irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
2406 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
2410 bacpy(&irk->bdaddr, bdaddr);
2411 irk->addr_type = addr_type;
2413 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2416 memcpy(irk->val, val, 16);
2417 bacpy(&irk->rpa, rpa);
2422 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
2424 struct link_key *key;
2426 key = hci_find_link_key(hdev, bdaddr);
2430 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2432 list_del_rcu(&key->list);
2433 kfree_rcu(key, rcu);
2438 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2443 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2444 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2447 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2449 list_del_rcu(&k->list);
2454 return removed ? 0 : -ENOENT;
2457 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
2461 list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2462 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
2465 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2467 list_del_rcu(&k->list);
2472 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
2475 struct smp_irk *irk;
2478 if (type == BDADDR_BREDR) {
2479 if (hci_find_link_key(hdev, bdaddr))
2484 /* Convert to HCI addr type which struct smp_ltk uses */
2485 if (type == BDADDR_LE_PUBLIC)
2486 addr_type = ADDR_LE_DEV_PUBLIC;
2488 addr_type = ADDR_LE_DEV_RANDOM;
2490 irk = hci_get_irk(hdev, bdaddr, addr_type);
2492 bdaddr = &irk->bdaddr;
2493 addr_type = irk->addr_type;
2497 list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2498 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
2508 /* HCI command timer function */
2509 static void hci_cmd_timeout(struct work_struct *work)
2511 struct hci_dev *hdev = container_of(work, struct hci_dev,
2514 if (hdev->sent_cmd) {
2515 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
2516 u16 opcode = __le16_to_cpu(sent->opcode);
2518 BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
2520 BT_ERR("%s command tx timeout", hdev->name);
2523 atomic_set(&hdev->cmd_cnt, 1);
2524 queue_work(hdev->workqueue, &hdev->cmd_work);
2527 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2528 bdaddr_t *bdaddr, u8 bdaddr_type)
2530 struct oob_data *data;
2532 list_for_each_entry(data, &hdev->remote_oob_data, list) {
2533 if (bacmp(bdaddr, &data->bdaddr) != 0)
2535 if (data->bdaddr_type != bdaddr_type)
2543 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2546 struct oob_data *data;
2548 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2552 BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2554 list_del(&data->list);
2560 void hci_remote_oob_data_clear(struct hci_dev *hdev)
2562 struct oob_data *data, *n;
2564 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
2565 list_del(&data->list);
2570 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2571 u8 bdaddr_type, u8 *hash192, u8 *rand192,
2572 u8 *hash256, u8 *rand256)
2574 struct oob_data *data;
2576 data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2578 data = kmalloc(sizeof(*data), GFP_KERNEL);
2582 bacpy(&data->bdaddr, bdaddr);
2583 data->bdaddr_type = bdaddr_type;
2584 list_add(&data->list, &hdev->remote_oob_data);
2587 if (hash192 && rand192) {
2588 memcpy(data->hash192, hash192, sizeof(data->hash192));
2589 memcpy(data->rand192, rand192, sizeof(data->rand192));
2590 if (hash256 && rand256)
2591 data->present = 0x03;
2593 memset(data->hash192, 0, sizeof(data->hash192));
2594 memset(data->rand192, 0, sizeof(data->rand192));
2595 if (hash256 && rand256)
2596 data->present = 0x02;
2598 data->present = 0x00;
2601 if (hash256 && rand256) {
2602 memcpy(data->hash256, hash256, sizeof(data->hash256));
2603 memcpy(data->rand256, rand256, sizeof(data->rand256));
2605 memset(data->hash256, 0, sizeof(data->hash256));
2606 memset(data->rand256, 0, sizeof(data->rand256));
2607 if (hash192 && rand192)
2608 data->present = 0x01;
2611 BT_DBG("%s for %pMR", hdev->name, bdaddr);
2616 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2617 bdaddr_t *bdaddr, u8 type)
2619 struct bdaddr_list *b;
2621 list_for_each_entry(b, bdaddr_list, list) {
2622 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2629 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2631 struct list_head *p, *n;
2633 list_for_each_safe(p, n, bdaddr_list) {
2634 struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
2641 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2643 struct bdaddr_list *entry;
2645 if (!bacmp(bdaddr, BDADDR_ANY))
2648 if (hci_bdaddr_list_lookup(list, bdaddr, type))
2651 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2655 bacpy(&entry->bdaddr, bdaddr);
2656 entry->bdaddr_type = type;
2658 list_add(&entry->list, list);
2663 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2665 struct bdaddr_list *entry;
2667 if (!bacmp(bdaddr, BDADDR_ANY)) {
2668 hci_bdaddr_list_clear(list);
2672 entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2676 list_del(&entry->list);
2682 /* This function requires the caller holds hdev->lock */
2683 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2684 bdaddr_t *addr, u8 addr_type)
2686 struct hci_conn_params *params;
2688 /* The conn params list only contains identity addresses */
2689 if (!hci_is_identity_address(addr, addr_type))
2692 list_for_each_entry(params, &hdev->le_conn_params, list) {
2693 if (bacmp(¶ms->addr, addr) == 0 &&
2694 params->addr_type == addr_type) {
2702 /* This function requires the caller holds hdev->lock */
2703 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2704 bdaddr_t *addr, u8 addr_type)
2706 struct hci_conn_params *param;
2708 /* The list only contains identity addresses */
2709 if (!hci_is_identity_address(addr, addr_type))
2712 list_for_each_entry(param, list, action) {
2713 if (bacmp(¶m->addr, addr) == 0 &&
2714 param->addr_type == addr_type)
2721 /* This function requires the caller holds hdev->lock */
2722 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2723 bdaddr_t *addr, u8 addr_type)
2725 struct hci_conn_params *params;
2727 if (!hci_is_identity_address(addr, addr_type))
2730 params = hci_conn_params_lookup(hdev, addr, addr_type);
2734 params = kzalloc(sizeof(*params), GFP_KERNEL);
2736 BT_ERR("Out of memory");
2740 bacpy(¶ms->addr, addr);
2741 params->addr_type = addr_type;
2743 list_add(¶ms->list, &hdev->le_conn_params);
2744 INIT_LIST_HEAD(¶ms->action);
2746 params->conn_min_interval = hdev->le_conn_min_interval;
2747 params->conn_max_interval = hdev->le_conn_max_interval;
2748 params->conn_latency = hdev->le_conn_latency;
2749 params->supervision_timeout = hdev->le_supv_timeout;
2750 params->auto_connect = HCI_AUTO_CONN_DISABLED;
2752 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2757 static void hci_conn_params_free(struct hci_conn_params *params)
2760 hci_conn_drop(params->conn);
2761 hci_conn_put(params->conn);
2764 list_del(¶ms->action);
2765 list_del(¶ms->list);
2769 /* This function requires the caller holds hdev->lock */
2770 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2772 struct hci_conn_params *params;
2774 params = hci_conn_params_lookup(hdev, addr, addr_type);
2778 hci_conn_params_free(params);
2780 hci_update_background_scan(hdev);
2782 BT_DBG("addr %pMR (type %u)", addr, addr_type);
2785 /* This function requires the caller holds hdev->lock */
2786 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2788 struct hci_conn_params *params, *tmp;
2790 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2791 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2793 list_del(¶ms->list);
2797 BT_DBG("All LE disabled connection parameters were removed");
2800 /* This function requires the caller holds hdev->lock */
2801 void hci_conn_params_clear_all(struct hci_dev *hdev)
2803 struct hci_conn_params *params, *tmp;
2805 list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2806 hci_conn_params_free(params);
2808 hci_update_background_scan(hdev);
2810 BT_DBG("All LE connection parameters were removed");
2813 static void inquiry_complete(struct hci_dev *hdev, u8 status, u16 opcode)
2816 BT_ERR("Failed to start inquiry: status %d", status);
2819 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2820 hci_dev_unlock(hdev);
2825 static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
2828 /* General inquiry access code (GIAC) */
2829 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2830 struct hci_cp_inquiry cp;
2834 BT_ERR("Failed to disable LE scanning: status %d", status);
2838 hdev->discovery.scan_start = 0;
2840 switch (hdev->discovery.type) {
2841 case DISCOV_TYPE_LE:
2843 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2844 hci_dev_unlock(hdev);
2847 case DISCOV_TYPE_INTERLEAVED:
2850 if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
2852 /* If we were running LE only scan, change discovery
2853 * state. If we were running both LE and BR/EDR inquiry
2854 * simultaneously, and BR/EDR inquiry is already
2855 * finished, stop discovery, otherwise BR/EDR inquiry
2856 * will stop discovery when finished.
2858 if (!test_bit(HCI_INQUIRY, &hdev->flags))
2859 hci_discovery_set_state(hdev,
2862 struct hci_request req;
2864 hci_inquiry_cache_flush(hdev);
2866 hci_req_init(&req, hdev);
2868 memset(&cp, 0, sizeof(cp));
2869 memcpy(&cp.lap, lap, sizeof(cp.lap));
2870 cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
2871 hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
2873 err = hci_req_run(&req, inquiry_complete);
2875 BT_ERR("Inquiry request failed: err %d", err);
2876 hci_discovery_set_state(hdev,
2881 hci_dev_unlock(hdev);
2886 static void le_scan_disable_work(struct work_struct *work)
2888 struct hci_dev *hdev = container_of(work, struct hci_dev,
2889 le_scan_disable.work);
2890 struct hci_request req;
2893 BT_DBG("%s", hdev->name);
2895 cancel_delayed_work_sync(&hdev->le_scan_restart);
2897 hci_req_init(&req, hdev);
2899 hci_req_add_le_scan_disable(&req);
2901 err = hci_req_run(&req, le_scan_disable_work_complete);
2903 BT_ERR("Disable LE scanning request failed: err %d", err);
2906 static void le_scan_restart_work_complete(struct hci_dev *hdev, u8 status,
2909 unsigned long timeout, duration, scan_start, now;
2911 BT_DBG("%s", hdev->name);
2914 BT_ERR("Failed to restart LE scan: status %d", status);
2918 if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
2919 !hdev->discovery.scan_start)
2922 /* When the scan was started, hdev->le_scan_disable has been queued
2923 * after duration from scan_start. During scan restart this job
2924 * has been canceled, and we need to queue it again after proper
2925 * timeout, to make sure that scan does not run indefinitely.
2927 duration = hdev->discovery.scan_duration;
2928 scan_start = hdev->discovery.scan_start;
2930 if (now - scan_start <= duration) {
2933 if (now >= scan_start)
2934 elapsed = now - scan_start;
2936 elapsed = ULONG_MAX - scan_start + now;
2938 timeout = duration - elapsed;
2942 queue_delayed_work(hdev->workqueue,
2943 &hdev->le_scan_disable, timeout);
2946 static void le_scan_restart_work(struct work_struct *work)
2948 struct hci_dev *hdev = container_of(work, struct hci_dev,
2949 le_scan_restart.work);
2950 struct hci_request req;
2951 struct hci_cp_le_set_scan_enable cp;
2954 BT_DBG("%s", hdev->name);
2956 /* If controller is not scanning we are done. */
2957 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
2960 hci_req_init(&req, hdev);
2962 hci_req_add_le_scan_disable(&req);
2964 memset(&cp, 0, sizeof(cp));
2965 cp.enable = LE_SCAN_ENABLE;
2966 cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
2967 hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
2969 err = hci_req_run(&req, le_scan_restart_work_complete);
2971 BT_ERR("Restart LE scan request failed: err %d", err);
2974 /* Copy the Identity Address of the controller.
2976 * If the controller has a public BD_ADDR, then by default use that one.
2977 * If this is a LE only controller without a public address, default to
2978 * the static random address.
2980 * For debugging purposes it is possible to force controllers with a
2981 * public address to use the static random address instead.
2983 * In case BR/EDR has been disabled on a dual-mode controller and
2984 * userspace has configured a static address, then that address
2985 * becomes the identity address instead of the public BR/EDR address.
2987 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2990 if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2991 !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2992 (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2993 bacmp(&hdev->static_addr, BDADDR_ANY))) {
2994 bacpy(bdaddr, &hdev->static_addr);
2995 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2997 bacpy(bdaddr, &hdev->bdaddr);
2998 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
3002 /* Alloc HCI device */
3003 struct hci_dev *hci_alloc_dev(void)
3005 struct hci_dev *hdev;
3007 hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3011 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
3012 hdev->esco_type = (ESCO_HV1);
3013 hdev->link_mode = (HCI_LM_ACCEPT);
3014 hdev->num_iac = 0x01; /* One IAC support is mandatory */
3015 hdev->io_capability = 0x03; /* No Input No Output */
3016 hdev->manufacturer = 0xffff; /* Default to internal use */
3017 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
3018 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3020 hdev->sniff_max_interval = 800;
3021 hdev->sniff_min_interval = 80;
3023 hdev->le_adv_channel_map = 0x07;
3024 hdev->le_adv_min_interval = 0x0800;
3025 hdev->le_adv_max_interval = 0x0800;
3026 hdev->le_scan_interval = 0x0060;
3027 hdev->le_scan_window = 0x0030;
3028 hdev->le_conn_min_interval = 0x0028;
3029 hdev->le_conn_max_interval = 0x0038;
3030 hdev->le_conn_latency = 0x0000;
3031 hdev->le_supv_timeout = 0x002a;
3032 hdev->le_def_tx_len = 0x001b;
3033 hdev->le_def_tx_time = 0x0148;
3034 hdev->le_max_tx_len = 0x001b;
3035 hdev->le_max_tx_time = 0x0148;
3036 hdev->le_max_rx_len = 0x001b;
3037 hdev->le_max_rx_time = 0x0148;
3039 hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3040 hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3041 hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
3042 hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3044 mutex_init(&hdev->lock);
3045 mutex_init(&hdev->req_lock);
3047 INIT_LIST_HEAD(&hdev->mgmt_pending);
3048 INIT_LIST_HEAD(&hdev->blacklist);
3049 INIT_LIST_HEAD(&hdev->whitelist);
3050 INIT_LIST_HEAD(&hdev->uuids);
3051 INIT_LIST_HEAD(&hdev->link_keys);
3052 INIT_LIST_HEAD(&hdev->long_term_keys);
3053 INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3054 INIT_LIST_HEAD(&hdev->remote_oob_data);
3055 INIT_LIST_HEAD(&hdev->le_white_list);
3056 INIT_LIST_HEAD(&hdev->le_conn_params);
3057 INIT_LIST_HEAD(&hdev->pend_le_conns);
3058 INIT_LIST_HEAD(&hdev->pend_le_reports);
3059 INIT_LIST_HEAD(&hdev->conn_hash.list);
3061 INIT_WORK(&hdev->rx_work, hci_rx_work);
3062 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
3063 INIT_WORK(&hdev->tx_work, hci_tx_work);
3064 INIT_WORK(&hdev->power_on, hci_power_on);
3065 INIT_WORK(&hdev->error_reset, hci_error_reset);
3067 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
3068 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
3069 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3070 INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
3072 skb_queue_head_init(&hdev->rx_q);
3073 skb_queue_head_init(&hdev->cmd_q);
3074 skb_queue_head_init(&hdev->raw_q);
3076 init_waitqueue_head(&hdev->req_wait_q);
3078 INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3080 hci_init_sysfs(hdev);
3081 discovery_init(hdev);
3082 adv_info_init(hdev);
3086 EXPORT_SYMBOL(hci_alloc_dev);
3088 /* Free HCI device */
3089 void hci_free_dev(struct hci_dev *hdev)
3091 /* will free via device release */
3092 put_device(&hdev->dev);
3094 EXPORT_SYMBOL(hci_free_dev);
3096 /* Register HCI device */
3097 int hci_register_dev(struct hci_dev *hdev)
3101 if (!hdev->open || !hdev->close || !hdev->send)
3104 /* Do not allow HCI_AMP devices to register at index 0,
3105 * so the index can be used as the AMP controller ID.
3107 switch (hdev->dev_type) {
3109 id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
3112 id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
3121 sprintf(hdev->name, "hci%d", id);
3124 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3126 hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3127 WQ_MEM_RECLAIM, 1, hdev->name);
3128 if (!hdev->workqueue) {
3133 hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
3134 WQ_MEM_RECLAIM, 1, hdev->name);
3135 if (!hdev->req_workqueue) {
3136 destroy_workqueue(hdev->workqueue);
3141 if (!IS_ERR_OR_NULL(bt_debugfs))
3142 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
3144 dev_set_name(&hdev->dev, "%s", hdev->name);
3146 error = device_add(&hdev->dev);
3150 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3151 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
3154 if (rfkill_register(hdev->rfkill) < 0) {
3155 rfkill_destroy(hdev->rfkill);
3156 hdev->rfkill = NULL;
3160 if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3161 hci_dev_set_flag(hdev, HCI_RFKILLED);
3163 hci_dev_set_flag(hdev, HCI_SETUP);
3164 hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3166 if (hdev->dev_type == HCI_BREDR) {
3167 /* Assume BR/EDR support until proven otherwise (such as
3168 * through reading supported features during init.
3170 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3173 write_lock(&hci_dev_list_lock);
3174 list_add(&hdev->list, &hci_dev_list);
3175 write_unlock(&hci_dev_list_lock);
3177 /* Devices that are marked for raw-only usage are unconfigured
3178 * and should not be included in normal operation.
3180 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3181 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3183 hci_notify(hdev, HCI_DEV_REG);
3186 queue_work(hdev->req_workqueue, &hdev->power_on);
3191 destroy_workqueue(hdev->workqueue);
3192 destroy_workqueue(hdev->req_workqueue);
3194 ida_simple_remove(&hci_index_ida, hdev->id);
3198 EXPORT_SYMBOL(hci_register_dev);
3200 /* Unregister HCI device */
3201 void hci_unregister_dev(struct hci_dev *hdev)
3205 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
3207 hci_dev_set_flag(hdev, HCI_UNREGISTER);
3211 write_lock(&hci_dev_list_lock);
3212 list_del(&hdev->list);
3213 write_unlock(&hci_dev_list_lock);
3215 hci_dev_do_close(hdev);
3217 cancel_work_sync(&hdev->power_on);
3219 if (!test_bit(HCI_INIT, &hdev->flags) &&
3220 !hci_dev_test_flag(hdev, HCI_SETUP) &&
3221 !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3223 mgmt_index_removed(hdev);
3224 hci_dev_unlock(hdev);
3227 /* mgmt_index_removed should take care of emptying the
3229 BUG_ON(!list_empty(&hdev->mgmt_pending));
3231 hci_notify(hdev, HCI_DEV_UNREG);
3234 rfkill_unregister(hdev->rfkill);
3235 rfkill_destroy(hdev->rfkill);
3238 device_del(&hdev->dev);
3240 debugfs_remove_recursive(hdev->debugfs);
3242 destroy_workqueue(hdev->workqueue);
3243 destroy_workqueue(hdev->req_workqueue);
3246 hci_bdaddr_list_clear(&hdev->blacklist);
3247 hci_bdaddr_list_clear(&hdev->whitelist);
3248 hci_uuids_clear(hdev);
3249 hci_link_keys_clear(hdev);
3250 hci_smp_ltks_clear(hdev);
3251 hci_smp_irks_clear(hdev);
3252 hci_remote_oob_data_clear(hdev);
3253 hci_bdaddr_list_clear(&hdev->le_white_list);
3254 hci_conn_params_clear_all(hdev);
3255 hci_discovery_filter_clear(hdev);
3256 hci_dev_unlock(hdev);
3260 ida_simple_remove(&hci_index_ida, id);
3262 EXPORT_SYMBOL(hci_unregister_dev);
3264 /* Suspend HCI device */
3265 int hci_suspend_dev(struct hci_dev *hdev)
3267 hci_notify(hdev, HCI_DEV_SUSPEND);
3270 EXPORT_SYMBOL(hci_suspend_dev);
3272 /* Resume HCI device */
3273 int hci_resume_dev(struct hci_dev *hdev)
3275 hci_notify(hdev, HCI_DEV_RESUME);
3278 EXPORT_SYMBOL(hci_resume_dev);
3280 /* Reset HCI device */
3281 int hci_reset_dev(struct hci_dev *hdev)
3283 const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3284 struct sk_buff *skb;
3286 skb = bt_skb_alloc(3, GFP_ATOMIC);
3290 bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
3291 memcpy(skb_put(skb, 3), hw_err, 3);
3293 /* Send Hardware Error to upper stack */
3294 return hci_recv_frame(hdev, skb);
3296 EXPORT_SYMBOL(hci_reset_dev);
3298 /* Receive frame from HCI drivers */
3299 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3301 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3302 && !test_bit(HCI_INIT, &hdev->flags))) {
3308 bt_cb(skb)->incoming = 1;
3311 __net_timestamp(skb);
3313 skb_queue_tail(&hdev->rx_q, skb);
3314 queue_work(hdev->workqueue, &hdev->rx_work);
3318 EXPORT_SYMBOL(hci_recv_frame);
3320 /* ---- Interface to upper protocols ---- */
3322 int hci_register_cb(struct hci_cb *cb)
3324 BT_DBG("%p name %s", cb, cb->name);
3326 mutex_lock(&hci_cb_list_lock);
3327 list_add_tail(&cb->list, &hci_cb_list);
3328 mutex_unlock(&hci_cb_list_lock);
3332 EXPORT_SYMBOL(hci_register_cb);
3334 int hci_unregister_cb(struct hci_cb *cb)
3336 BT_DBG("%p name %s", cb, cb->name);
3338 mutex_lock(&hci_cb_list_lock);
3339 list_del(&cb->list);
3340 mutex_unlock(&hci_cb_list_lock);
3344 EXPORT_SYMBOL(hci_unregister_cb);
3346 static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3350 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
3353 __net_timestamp(skb);
3355 /* Send copy to monitor */
3356 hci_send_to_monitor(hdev, skb);
3358 if (atomic_read(&hdev->promisc)) {
3359 /* Send copy to the sockets */
3360 hci_send_to_sock(hdev, skb);
3363 /* Get rid of skb owner, prior to sending to the driver. */
3366 err = hdev->send(hdev, skb);
3368 BT_ERR("%s sending frame failed (%d)", hdev->name, err);
3373 /* Send HCI command */
3374 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3377 struct sk_buff *skb;
3379 BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3381 skb = hci_prepare_cmd(hdev, opcode, plen, param);
3383 BT_ERR("%s no memory for command", hdev->name);
3387 /* Stand-alone HCI commands must be flagged as
3388 * single-command requests.
3390 bt_cb(skb)->req.start = true;
3392 skb_queue_tail(&hdev->cmd_q, skb);
3393 queue_work(hdev->workqueue, &hdev->cmd_work);
3398 /* Get data from the previously sent command */
3399 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3401 struct hci_command_hdr *hdr;
3403 if (!hdev->sent_cmd)
3406 hdr = (void *) hdev->sent_cmd->data;
3408 if (hdr->opcode != cpu_to_le16(opcode))
3411 BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3413 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3417 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3419 struct hci_acl_hdr *hdr;
3422 skb_push(skb, HCI_ACL_HDR_SIZE);
3423 skb_reset_transport_header(skb);
3424 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3425 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3426 hdr->dlen = cpu_to_le16(len);
3429 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3430 struct sk_buff *skb, __u16 flags)
3432 struct hci_conn *conn = chan->conn;
3433 struct hci_dev *hdev = conn->hdev;
3434 struct sk_buff *list;
3436 skb->len = skb_headlen(skb);
3439 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3441 switch (hdev->dev_type) {
3443 hci_add_acl_hdr(skb, conn->handle, flags);
3446 hci_add_acl_hdr(skb, chan->handle, flags);
3449 BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
3453 list = skb_shinfo(skb)->frag_list;
3455 /* Non fragmented */
3456 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3458 skb_queue_tail(queue, skb);
3461 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3463 skb_shinfo(skb)->frag_list = NULL;
3465 /* Queue all fragments atomically. We need to use spin_lock_bh
3466 * here because of 6LoWPAN links, as there this function is
3467 * called from softirq and using normal spin lock could cause
3470 spin_lock_bh(&queue->lock);
3472 __skb_queue_tail(queue, skb);
3474 flags &= ~ACL_START;
3477 skb = list; list = list->next;
3479 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3480 hci_add_acl_hdr(skb, conn->handle, flags);
3482 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3484 __skb_queue_tail(queue, skb);
3487 spin_unlock_bh(&queue->lock);
3491 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3493 struct hci_dev *hdev = chan->conn->hdev;
3495 BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3497 hci_queue_acl(chan, &chan->data_q, skb, flags);
3499 queue_work(hdev->workqueue, &hdev->tx_work);
3503 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3505 struct hci_dev *hdev = conn->hdev;
3506 struct hci_sco_hdr hdr;
3508 BT_DBG("%s len %d", hdev->name, skb->len);
3510 hdr.handle = cpu_to_le16(conn->handle);
3511 hdr.dlen = skb->len;
3513 skb_push(skb, HCI_SCO_HDR_SIZE);
3514 skb_reset_transport_header(skb);
3515 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3517 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
3519 skb_queue_tail(&conn->data_q, skb);
3520 queue_work(hdev->workqueue, &hdev->tx_work);
3523 /* ---- HCI TX task (outgoing data) ---- */
3525 /* HCI Connection scheduler */
3526 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3529 struct hci_conn_hash *h = &hdev->conn_hash;
3530 struct hci_conn *conn = NULL, *c;
3531 unsigned int num = 0, min = ~0;
3533 /* We don't have to lock device here. Connections are always
3534 * added and removed with TX task disabled. */
3538 list_for_each_entry_rcu(c, &h->list, list) {
3539 if (c->type != type || skb_queue_empty(&c->data_q))
3542 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3547 if (c->sent < min) {
3552 if (hci_conn_num(hdev, type) == num)
3561 switch (conn->type) {
3563 cnt = hdev->acl_cnt;
3567 cnt = hdev->sco_cnt;
3570 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3574 BT_ERR("Unknown link type");
3582 BT_DBG("conn %p quote %d", conn, *quote);
3586 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3588 struct hci_conn_hash *h = &hdev->conn_hash;
3591 BT_ERR("%s link tx timeout", hdev->name);
3595 /* Kill stalled connections */
3596 list_for_each_entry_rcu(c, &h->list, list) {
3597 if (c->type == type && c->sent) {
3598 BT_ERR("%s killing stalled connection %pMR",
3599 hdev->name, &c->dst);
3600 hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3607 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3610 struct hci_conn_hash *h = &hdev->conn_hash;
3611 struct hci_chan *chan = NULL;
3612 unsigned int num = 0, min = ~0, cur_prio = 0;
3613 struct hci_conn *conn;
3614 int cnt, q, conn_num = 0;
3616 BT_DBG("%s", hdev->name);
3620 list_for_each_entry_rcu(conn, &h->list, list) {
3621 struct hci_chan *tmp;
3623 if (conn->type != type)
3626 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3631 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3632 struct sk_buff *skb;
3634 if (skb_queue_empty(&tmp->data_q))
3637 skb = skb_peek(&tmp->data_q);
3638 if (skb->priority < cur_prio)
3641 if (skb->priority > cur_prio) {
3644 cur_prio = skb->priority;
3649 if (conn->sent < min) {
3655 if (hci_conn_num(hdev, type) == conn_num)
3664 switch (chan->conn->type) {
3666 cnt = hdev->acl_cnt;
3669 cnt = hdev->block_cnt;
3673 cnt = hdev->sco_cnt;
3676 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3680 BT_ERR("Unknown link type");
3685 BT_DBG("chan %p quote %d", chan, *quote);
3689 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3691 struct hci_conn_hash *h = &hdev->conn_hash;
3692 struct hci_conn *conn;
3695 BT_DBG("%s", hdev->name);
3699 list_for_each_entry_rcu(conn, &h->list, list) {
3700 struct hci_chan *chan;
3702 if (conn->type != type)
3705 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3710 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3711 struct sk_buff *skb;
3718 if (skb_queue_empty(&chan->data_q))
3721 skb = skb_peek(&chan->data_q);
3722 if (skb->priority >= HCI_PRIO_MAX - 1)
3725 skb->priority = HCI_PRIO_MAX - 1;
3727 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3731 if (hci_conn_num(hdev, type) == num)
3739 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3741 /* Calculate count of blocks used by this packet */
3742 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3745 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
3747 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3748 /* ACL tx timeout must be longer than maximum
3749 * link supervision timeout (40.9 seconds) */
3750 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
3751 HCI_ACL_TX_TIMEOUT))
3752 hci_link_tx_to(hdev, ACL_LINK);
3756 static void hci_sched_acl_pkt(struct hci_dev *hdev)
3758 unsigned int cnt = hdev->acl_cnt;
3759 struct hci_chan *chan;
3760 struct sk_buff *skb;
3763 __check_timeout(hdev, cnt);
3765 while (hdev->acl_cnt &&
3766 (chan = hci_chan_sent(hdev, ACL_LINK, "e))) {
3767 u32 priority = (skb_peek(&chan->data_q))->priority;
3768 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3769 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3770 skb->len, skb->priority);
3772 /* Stop if priority has changed */
3773 if (skb->priority < priority)
3776 skb = skb_dequeue(&chan->data_q);
3778 hci_conn_enter_active_mode(chan->conn,
3779 bt_cb(skb)->force_active);
3781 hci_send_frame(hdev, skb);
3782 hdev->acl_last_tx = jiffies;
3790 if (cnt != hdev->acl_cnt)
3791 hci_prio_recalculate(hdev, ACL_LINK);
3794 static void hci_sched_acl_blk(struct hci_dev *hdev)
3796 unsigned int cnt = hdev->block_cnt;
3797 struct hci_chan *chan;
3798 struct sk_buff *skb;
3802 __check_timeout(hdev, cnt);
3804 BT_DBG("%s", hdev->name);
3806 if (hdev->dev_type == HCI_AMP)
3811 while (hdev->block_cnt > 0 &&
3812 (chan = hci_chan_sent(hdev, type, "e))) {
3813 u32 priority = (skb_peek(&chan->data_q))->priority;
3814 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3817 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3818 skb->len, skb->priority);
3820 /* Stop if priority has changed */
3821 if (skb->priority < priority)
3824 skb = skb_dequeue(&chan->data_q);
3826 blocks = __get_blocks(hdev, skb);
3827 if (blocks > hdev->block_cnt)
3830 hci_conn_enter_active_mode(chan->conn,
3831 bt_cb(skb)->force_active);
3833 hci_send_frame(hdev, skb);
3834 hdev->acl_last_tx = jiffies;
3836 hdev->block_cnt -= blocks;
3839 chan->sent += blocks;
3840 chan->conn->sent += blocks;
3844 if (cnt != hdev->block_cnt)
3845 hci_prio_recalculate(hdev, type);
3848 static void hci_sched_acl(struct hci_dev *hdev)
3850 BT_DBG("%s", hdev->name);
3852 /* No ACL link over BR/EDR controller */
3853 if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
3856 /* No AMP link over AMP controller */
3857 if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3860 switch (hdev->flow_ctl_mode) {
3861 case HCI_FLOW_CTL_MODE_PACKET_BASED:
3862 hci_sched_acl_pkt(hdev);
3865 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3866 hci_sched_acl_blk(hdev);
3872 static void hci_sched_sco(struct hci_dev *hdev)
3874 struct hci_conn *conn;
3875 struct sk_buff *skb;
3878 BT_DBG("%s", hdev->name);
3880 if (!hci_conn_num(hdev, SCO_LINK))
3883 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) {
3884 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3885 BT_DBG("skb %p len %d", skb, skb->len);
3886 hci_send_frame(hdev, skb);
3889 if (conn->sent == ~0)
3895 static void hci_sched_esco(struct hci_dev *hdev)
3897 struct hci_conn *conn;
3898 struct sk_buff *skb;
3901 BT_DBG("%s", hdev->name);
3903 if (!hci_conn_num(hdev, ESCO_LINK))
3906 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3908 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3909 BT_DBG("skb %p len %d", skb, skb->len);
3910 hci_send_frame(hdev, skb);
3913 if (conn->sent == ~0)
3919 static void hci_sched_le(struct hci_dev *hdev)
3921 struct hci_chan *chan;
3922 struct sk_buff *skb;
3923 int quote, cnt, tmp;
3925 BT_DBG("%s", hdev->name);
3927 if (!hci_conn_num(hdev, LE_LINK))
3930 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
3931 /* LE tx timeout must be longer than maximum
3932 * link supervision timeout (40.9 seconds) */
3933 if (!hdev->le_cnt && hdev->le_pkts &&
3934 time_after(jiffies, hdev->le_last_tx + HZ * 45))
3935 hci_link_tx_to(hdev, LE_LINK);
3938 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3940 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
3941 u32 priority = (skb_peek(&chan->data_q))->priority;
3942 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3943 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3944 skb->len, skb->priority);
3946 /* Stop if priority has changed */
3947 if (skb->priority < priority)
3950 skb = skb_dequeue(&chan->data_q);
3952 hci_send_frame(hdev, skb);
3953 hdev->le_last_tx = jiffies;
3964 hdev->acl_cnt = cnt;
3967 hci_prio_recalculate(hdev, LE_LINK);
3970 static void hci_tx_work(struct work_struct *work)
3972 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3973 struct sk_buff *skb;
3975 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
3976 hdev->sco_cnt, hdev->le_cnt);
3978 if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3979 /* Schedule queues and send stuff to HCI driver */
3980 hci_sched_acl(hdev);
3981 hci_sched_sco(hdev);
3982 hci_sched_esco(hdev);
3986 /* Send next queued raw (unknown type) packet */
3987 while ((skb = skb_dequeue(&hdev->raw_q)))
3988 hci_send_frame(hdev, skb);
3991 /* ----- HCI RX task (incoming data processing) ----- */
3993 /* ACL data packet */
3994 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3996 struct hci_acl_hdr *hdr = (void *) skb->data;
3997 struct hci_conn *conn;
3998 __u16 handle, flags;
4000 skb_pull(skb, HCI_ACL_HDR_SIZE);
4002 handle = __le16_to_cpu(hdr->handle);
4003 flags = hci_flags(handle);
4004 handle = hci_handle(handle);
4006 BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4009 hdev->stat.acl_rx++;
4012 conn = hci_conn_hash_lookup_handle(hdev, handle);
4013 hci_dev_unlock(hdev);
4016 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4018 /* Send to upper protocol */
4019 l2cap_recv_acldata(conn, skb, flags);
4022 BT_ERR("%s ACL packet for unknown connection handle %d",
4023 hdev->name, handle);
4029 /* SCO data packet */
4030 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
4032 struct hci_sco_hdr *hdr = (void *) skb->data;
4033 struct hci_conn *conn;
4036 skb_pull(skb, HCI_SCO_HDR_SIZE);
4038 handle = __le16_to_cpu(hdr->handle);
4040 BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
4042 hdev->stat.sco_rx++;
4045 conn = hci_conn_hash_lookup_handle(hdev, handle);
4046 hci_dev_unlock(hdev);
4049 /* Send to upper protocol */
4050 sco_recv_scodata(conn, skb);
4053 BT_ERR("%s SCO packet for unknown connection handle %d",
4054 hdev->name, handle);
4060 static bool hci_req_is_complete(struct hci_dev *hdev)
4062 struct sk_buff *skb;
4064 skb = skb_peek(&hdev->cmd_q);
4068 return bt_cb(skb)->req.start;
4071 static void hci_resend_last(struct hci_dev *hdev)
4073 struct hci_command_hdr *sent;
4074 struct sk_buff *skb;
4077 if (!hdev->sent_cmd)
4080 sent = (void *) hdev->sent_cmd->data;
4081 opcode = __le16_to_cpu(sent->opcode);
4082 if (opcode == HCI_OP_RESET)
4085 skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
4089 skb_queue_head(&hdev->cmd_q, skb);
4090 queue_work(hdev->workqueue, &hdev->cmd_work);
4093 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
4094 hci_req_complete_t *req_complete,
4095 hci_req_complete_skb_t *req_complete_skb)
4097 struct sk_buff *skb;
4098 unsigned long flags;
4100 BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
4102 /* If the completed command doesn't match the last one that was
4103 * sent we need to do special handling of it.
4105 if (!hci_sent_cmd_data(hdev, opcode)) {
4106 /* Some CSR based controllers generate a spontaneous
4107 * reset complete event during init and any pending
4108 * command will never be completed. In such a case we
4109 * need to resend whatever was the last sent
4112 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
4113 hci_resend_last(hdev);
4118 /* If the command succeeded and there's still more commands in
4119 * this request the request is not yet complete.
4121 if (!status && !hci_req_is_complete(hdev))
4124 /* If this was the last command in a request the complete
4125 * callback would be found in hdev->sent_cmd instead of the
4126 * command queue (hdev->cmd_q).
4128 if (bt_cb(hdev->sent_cmd)->req.complete) {
4129 *req_complete = bt_cb(hdev->sent_cmd)->req.complete;
4133 if (bt_cb(hdev->sent_cmd)->req.complete_skb) {
4134 *req_complete_skb = bt_cb(hdev->sent_cmd)->req.complete_skb;
4138 /* Remove all pending commands belonging to this request */
4139 spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4140 while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4141 if (bt_cb(skb)->req.start) {
4142 __skb_queue_head(&hdev->cmd_q, skb);
4146 *req_complete = bt_cb(skb)->req.complete;
4147 *req_complete_skb = bt_cb(skb)->req.complete_skb;
4150 spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4153 static void hci_rx_work(struct work_struct *work)
4155 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4156 struct sk_buff *skb;
4158 BT_DBG("%s", hdev->name);
4160 while ((skb = skb_dequeue(&hdev->rx_q))) {
4161 /* Send copy to monitor */
4162 hci_send_to_monitor(hdev, skb);
4164 if (atomic_read(&hdev->promisc)) {
4165 /* Send copy to the sockets */
4166 hci_send_to_sock(hdev, skb);
4169 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4174 if (test_bit(HCI_INIT, &hdev->flags)) {
4175 /* Don't process data packets in this states. */
4176 switch (bt_cb(skb)->pkt_type) {
4177 case HCI_ACLDATA_PKT:
4178 case HCI_SCODATA_PKT:
4185 switch (bt_cb(skb)->pkt_type) {
4187 BT_DBG("%s Event packet", hdev->name);
4188 hci_event_packet(hdev, skb);
4191 case HCI_ACLDATA_PKT:
4192 BT_DBG("%s ACL data packet", hdev->name);
4193 hci_acldata_packet(hdev, skb);
4196 case HCI_SCODATA_PKT:
4197 BT_DBG("%s SCO data packet", hdev->name);
4198 hci_scodata_packet(hdev, skb);
4208 static void hci_cmd_work(struct work_struct *work)
4210 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4211 struct sk_buff *skb;
4213 BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4214 atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4216 /* Send queued commands */
4217 if (atomic_read(&hdev->cmd_cnt)) {
4218 skb = skb_dequeue(&hdev->cmd_q);
4222 kfree_skb(hdev->sent_cmd);
4224 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4225 if (hdev->sent_cmd) {
4226 atomic_dec(&hdev->cmd_cnt);
4227 hci_send_frame(hdev, skb);
4228 if (test_bit(HCI_RESET, &hdev->flags))
4229 cancel_delayed_work(&hdev->cmd_timer);
4231 schedule_delayed_work(&hdev->cmd_timer,
4234 skb_queue_head(&hdev->cmd_q, skb);
4235 queue_work(hdev->workqueue, &hdev->cmd_work);