hci_core.c 109.3 KB
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/*
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   BlueZ - Bluetooth protocol stack for Linux
   Copyright (C) 2000-2001 Qualcomm Incorporated
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   Copyright (C) 2011 ProFUSION Embedded Systems
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   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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   SOFTWARE IS DISCLAIMED.
*/

/* Bluetooth HCI core. */

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#include <linux/export.h>
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#include <linux/idr.h>
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#include <linux/rfkill.h>
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#include <linux/debugfs.h>
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#include <linux/crypto.h>
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#include <linux/property.h>
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#include <asm/unaligned.h>
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#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/l2cap.h>
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#include <net/bluetooth/mgmt.h>
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#include "hci_request.h"
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#include "hci_debugfs.h"
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#include "smp.h"
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#include "leds.h"
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static void hci_rx_work(struct work_struct *work);
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static void hci_cmd_work(struct work_struct *work);
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static void hci_tx_work(struct work_struct *work);
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/* HCI device list */
LIST_HEAD(hci_dev_list);
DEFINE_RWLOCK(hci_dev_list_lock);

/* HCI callback list */
LIST_HEAD(hci_cb_list);
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DEFINE_MUTEX(hci_cb_list_lock);
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/* HCI ID Numbering */
static DEFINE_IDA(hci_index_ida);

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/* ---- HCI debugfs entries ---- */

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static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
			     size_t count, loff_t *ppos)
{
	struct hci_dev *hdev = file->private_data;
	char buf[3];

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	buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y' : 'N';
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	buf[1] = '\n';
	buf[2] = '\0';
	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}

static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
			      size_t count, loff_t *ppos)
{
	struct hci_dev *hdev = file->private_data;
	struct sk_buff *skb;
	bool enable;
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	int err;
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	if (!test_bit(HCI_UP, &hdev->flags))
		return -ENETDOWN;

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	err = kstrtobool_from_user(user_buf, count, &enable);
	if (err)
		return err;
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	if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
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		return -EALREADY;

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	hci_req_sync_lock(hdev);
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	if (enable)
		skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
				     HCI_CMD_TIMEOUT);
	else
		skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
				     HCI_CMD_TIMEOUT);
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	hci_req_sync_unlock(hdev);
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	if (IS_ERR(skb))
		return PTR_ERR(skb);

	kfree_skb(skb);

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	hci_dev_change_flag(hdev, HCI_DUT_MODE);
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	return count;
}

static const struct file_operations dut_mode_fops = {
	.open		= simple_open,
	.read		= dut_mode_read,
	.write		= dut_mode_write,
	.llseek		= default_llseek,
};

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static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
				size_t count, loff_t *ppos)
{
	struct hci_dev *hdev = file->private_data;
	char buf[3];

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	buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y' : 'N';
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	buf[1] = '\n';
	buf[2] = '\0';
	return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}

static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
				 size_t count, loff_t *ppos)
{
	struct hci_dev *hdev = file->private_data;
	bool enable;
	int err;

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	err = kstrtobool_from_user(user_buf, count, &enable);
	if (err)
		return err;
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	/* When the diagnostic flags are not persistent and the transport
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	 * is not active or in user channel operation, then there is no need
	 * for the vendor callback. Instead just store the desired value and
	 * the setting will be programmed when the controller gets powered on.
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	 */
	if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
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	    (!test_bit(HCI_RUNNING, &hdev->flags) ||
	     hci_dev_test_flag(hdev, HCI_USER_CHANNEL)))
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		goto done;

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	hci_req_sync_lock(hdev);
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	err = hdev->set_diag(hdev, enable);
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	hci_req_sync_unlock(hdev);
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	if (err < 0)
		return err;

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done:
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	if (enable)
		hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
	else
		hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);

	return count;
}

static const struct file_operations vendor_diag_fops = {
	.open		= simple_open,
	.read		= vendor_diag_read,
	.write		= vendor_diag_write,
	.llseek		= default_llseek,
};

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static void hci_debugfs_create_basic(struct hci_dev *hdev)
{
	debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
			    &dut_mode_fops);

	if (hdev->set_diag)
		debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
				    &vendor_diag_fops);
}

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static int hci_reset_req(struct hci_request *req, unsigned long opt)
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{
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	BT_DBG("%s %ld", req->hdev->name, opt);
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	/* Reset device */
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	set_bit(HCI_RESET, &req->hdev->flags);
	hci_req_add(req, HCI_OP_RESET, 0, NULL);
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	return 0;
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}

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static void bredr_init(struct hci_request *req)
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{
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	req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
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	/* Read Local Supported Features */
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	hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
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	/* Read Local Version */
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	hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
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	/* Read BD Address */
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	hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
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}

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static void amp_init1(struct hci_request *req)
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{
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	req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
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	/* Read Local Version */
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	hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
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	/* Read Local Supported Commands */
	hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);

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	/* Read Local AMP Info */
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	hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
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	/* Read Data Blk size */
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	hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
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	/* Read Flow Control Mode */
	hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);

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	/* Read Location Data */
	hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
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}

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static int amp_init2(struct hci_request *req)
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{
	/* Read Local Supported Features. Not all AMP controllers
	 * support this so it's placed conditionally in the second
	 * stage init.
	 */
	if (req->hdev->commands[14] & 0x20)
		hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
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	return 0;
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}

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static int hci_init1_req(struct hci_request *req, unsigned long opt)
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{
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	struct hci_dev *hdev = req->hdev;
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	BT_DBG("%s %ld", hdev->name, opt);

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	/* Reset */
	if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
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		hci_reset_req(req, 0);
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	switch (hdev->dev_type) {
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	case HCI_PRIMARY:
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		bredr_init(req);
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		break;
	case HCI_AMP:
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		amp_init1(req);
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		break;
	default:
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		bt_dev_err(hdev, "Unknown device type %d", hdev->dev_type);
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		break;
	}
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	return 0;
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}

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static void bredr_setup(struct hci_request *req)
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{
	__le16 param;
	__u8 flt_type;

	/* Read Buffer Size (ACL mtu, max pkt, etc.) */
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	hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
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	/* Read Class of Device */
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	hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
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	/* Read Local Name */
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	hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
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	/* Read Voice Setting */
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	hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
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	/* Read Number of Supported IAC */
	hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);

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	/* Read Current IAC LAP */
	hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);

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	/* Clear Event Filters */
	flt_type = HCI_FLT_CLEAR_ALL;
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	hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
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	/* Connection accept timeout ~20 secs */
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	param = cpu_to_le16(0x7d00);
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	hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
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}

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static void le_setup(struct hci_request *req)
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{
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	struct hci_dev *hdev = req->hdev;

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	/* Read LE Buffer Size */
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	hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
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	/* Read LE Local Supported Features */
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	hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
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	/* Read LE Supported States */
	hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);

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	/* LE-only controllers have LE implicitly enabled */
	if (!lmp_bredr_capable(hdev))
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		hci_dev_set_flag(hdev, HCI_LE_ENABLED);
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}

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static void hci_setup_event_mask(struct hci_request *req)
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{
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	struct hci_dev *hdev = req->hdev;

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	/* The second byte is 0xff instead of 0x9f (two reserved bits
	 * disabled) since a Broadcom 1.2 dongle doesn't respond to the
	 * command otherwise.
	 */
	u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };

	/* CSR 1.1 dongles does not accept any bitfield so don't try to set
	 * any event mask for pre 1.2 devices.
	 */
	if (hdev->hci_ver < BLUETOOTH_VER_1_2)
		return;

	if (lmp_bredr_capable(hdev)) {
		events[4] |= 0x01; /* Flow Specification Complete */
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	} else {
		/* Use a different default for LE-only devices */
		memset(events, 0, sizeof(events));
		events[1] |= 0x20; /* Command Complete */
		events[1] |= 0x40; /* Command Status */
		events[1] |= 0x80; /* Hardware Error */
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		/* If the controller supports the Disconnect command, enable
		 * the corresponding event. In addition enable packet flow
		 * control related events.
		 */
		if (hdev->commands[0] & 0x20) {
			events[0] |= 0x10; /* Disconnection Complete */
			events[2] |= 0x04; /* Number of Completed Packets */
			events[3] |= 0x02; /* Data Buffer Overflow */
		}

		/* If the controller supports the Read Remote Version
		 * Information command, enable the corresponding event.
		 */
		if (hdev->commands[2] & 0x80)
			events[1] |= 0x08; /* Read Remote Version Information
					    * Complete
					    */
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		if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
			events[0] |= 0x80; /* Encryption Change */
			events[5] |= 0x80; /* Encryption Key Refresh Complete */
		}
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	}

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	if (lmp_inq_rssi_capable(hdev) ||
	    test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks))
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		events[4] |= 0x02; /* Inquiry Result with RSSI */

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	if (lmp_ext_feat_capable(hdev))
		events[4] |= 0x04; /* Read Remote Extended Features Complete */

	if (lmp_esco_capable(hdev)) {
		events[5] |= 0x08; /* Synchronous Connection Complete */
		events[5] |= 0x10; /* Synchronous Connection Changed */
	}

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	if (lmp_sniffsubr_capable(hdev))
		events[5] |= 0x20; /* Sniff Subrating */

	if (lmp_pause_enc_capable(hdev))
		events[5] |= 0x80; /* Encryption Key Refresh Complete */

	if (lmp_ext_inq_capable(hdev))
		events[5] |= 0x40; /* Extended Inquiry Result */

	if (lmp_no_flush_capable(hdev))
		events[7] |= 0x01; /* Enhanced Flush Complete */

	if (lmp_lsto_capable(hdev))
		events[6] |= 0x80; /* Link Supervision Timeout Changed */

	if (lmp_ssp_capable(hdev)) {
		events[6] |= 0x01;	/* IO Capability Request */
		events[6] |= 0x02;	/* IO Capability Response */
		events[6] |= 0x04;	/* User Confirmation Request */
		events[6] |= 0x08;	/* User Passkey Request */
		events[6] |= 0x10;	/* Remote OOB Data Request */
		events[6] |= 0x20;	/* Simple Pairing Complete */
		events[7] |= 0x04;	/* User Passkey Notification */
		events[7] |= 0x08;	/* Keypress Notification */
		events[7] |= 0x10;	/* Remote Host Supported
					 * Features Notification
					 */
	}

	if (lmp_le_capable(hdev))
		events[7] |= 0x20;	/* LE Meta-Event */

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	hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
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}

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static int hci_init2_req(struct hci_request *req, unsigned long opt)
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{
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	struct hci_dev *hdev = req->hdev;

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	if (hdev->dev_type == HCI_AMP)
		return amp_init2(req);

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	if (lmp_bredr_capable(hdev))
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		bredr_setup(req);
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	else
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		hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
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	if (lmp_le_capable(hdev))
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		le_setup(req);
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	/* All Bluetooth 1.2 and later controllers should support the
	 * HCI command for reading the local supported commands.
	 *
	 * Unfortunately some controllers indicate Bluetooth 1.2 support,
	 * but do not have support for this command. If that is the case,
	 * the driver can quirk the behavior and skip reading the local
	 * supported commands.
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	 */
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	if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
	    !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
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		hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
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	if (lmp_ssp_capable(hdev)) {
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		/* When SSP is available, then the host features page
		 * should also be available as well. However some
		 * controllers list the max_page as 0 as long as SSP
		 * has not been enabled. To achieve proper debugging
		 * output, force the minimum max_page to 1 at least.
		 */
		hdev->max_page = 0x01;

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		if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
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			u8 mode = 0x01;
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			hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
				    sizeof(mode), &mode);
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		} else {
			struct hci_cp_write_eir cp;

			memset(hdev->eir, 0, sizeof(hdev->eir));
			memset(&cp, 0, sizeof(cp));

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			hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
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		}
	}

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	if (lmp_inq_rssi_capable(hdev) ||
	    test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
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		u8 mode;

		/* If Extended Inquiry Result events are supported, then
		 * they are clearly preferred over Inquiry Result with RSSI
		 * events.
		 */
		mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;

		hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
	}
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	if (lmp_inq_tx_pwr_capable(hdev))
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		hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
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	if (lmp_ext_feat_capable(hdev)) {
		struct hci_cp_read_local_ext_features cp;

		cp.page = 0x01;
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		hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
			    sizeof(cp), &cp);
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	}

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	if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
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		u8 enable = 1;
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		hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
			    &enable);
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	}
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	return 0;
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}

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static void hci_setup_link_policy(struct hci_request *req)
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{
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	struct hci_dev *hdev = req->hdev;
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	struct hci_cp_write_def_link_policy cp;
	u16 link_policy = 0;

	if (lmp_rswitch_capable(hdev))
		link_policy |= HCI_LP_RSWITCH;
	if (lmp_hold_capable(hdev))
		link_policy |= HCI_LP_HOLD;
	if (lmp_sniff_capable(hdev))
		link_policy |= HCI_LP_SNIFF;
	if (lmp_park_capable(hdev))
		link_policy |= HCI_LP_PARK;

	cp.policy = cpu_to_le16(link_policy);
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	hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
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}

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static void hci_set_le_support(struct hci_request *req)
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{
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	struct hci_dev *hdev = req->hdev;
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	struct hci_cp_write_le_host_supported cp;

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	/* LE-only devices do not support explicit enablement */
	if (!lmp_bredr_capable(hdev))
		return;

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	memset(&cp, 0, sizeof(cp));

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	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
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		cp.le = 0x01;
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		cp.simul = 0x00;
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	}

	if (cp.le != lmp_host_le_capable(hdev))
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		hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
			    &cp);
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}

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static void hci_set_event_mask_page_2(struct hci_request *req)
{
	struct hci_dev *hdev = req->hdev;
	u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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	bool changed = false;
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	/* If Connectionless Slave Broadcast master role is supported
	 * enable all necessary events for it.
	 */
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	if (lmp_csb_master_capable(hdev)) {
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		events[1] |= 0x40;	/* Triggered Clock Capture */
		events[1] |= 0x80;	/* Synchronization Train Complete */
		events[2] |= 0x10;	/* Slave Page Response Timeout */
		events[2] |= 0x20;	/* CSB Channel Map Change */
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		changed = true;
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	}

	/* If Connectionless Slave Broadcast slave role is supported
	 * enable all necessary events for it.
	 */
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	if (lmp_csb_slave_capable(hdev)) {
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		events[2] |= 0x01;	/* Synchronization Train Received */
		events[2] |= 0x02;	/* CSB Receive */
		events[2] |= 0x04;	/* CSB Timeout */
		events[2] |= 0x08;	/* Truncated Page Complete */
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		changed = true;
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	}

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	/* Enable Authenticated Payload Timeout Expired event if supported */
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	if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
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		events[2] |= 0x80;
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		changed = true;
	}
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	/* Some Broadcom based controllers indicate support for Set Event
	 * Mask Page 2 command, but then actually do not support it. Since
	 * the default value is all bits set to zero, the command is only
	 * required if the event mask has to be changed. In case no change
	 * to the event mask is needed, skip this command.
	 */
	if (changed)
		hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
			    sizeof(events), events);
582 583
}

584
static int hci_init3_req(struct hci_request *req, unsigned long opt)
585
{
586
	struct hci_dev *hdev = req->hdev;
587
	u8 p;
588

589 590
	hci_setup_event_mask(req);

591 592
	if (hdev->commands[6] & 0x20 &&
	    !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
593 594 595 596 597 598 599
		struct hci_cp_read_stored_link_key cp;

		bacpy(&cp.bdaddr, BDADDR_ANY);
		cp.read_all = 0x01;
		hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
	}

600
	if (hdev->commands[5] & 0x10)
601
		hci_setup_link_policy(req);
602

603 604 605 606 607 608 609 610 611 612
	if (hdev->commands[8] & 0x01)
		hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);

	/* Some older Broadcom based Bluetooth 1.2 controllers do not
	 * support the Read Page Scan Type command. Check support for
	 * this command in the bit mask of supported commands.
	 */
	if (hdev->commands[13] & 0x01)
		hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);

613 614 615 616
	if (lmp_le_capable(hdev)) {
		u8 events[8];

		memset(events, 0, sizeof(events));
617 618 619

		if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
			events[0] |= 0x10;	/* LE Long Term Key Request */
620 621 622 623 624 625 626 627 628

		/* If controller supports the Connection Parameters Request
		 * Link Layer Procedure, enable the corresponding event.
		 */
		if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
			events[0] |= 0x20;	/* LE Remote Connection
						 * Parameter Request
						 */

629 630 631 632 633 634
		/* If the controller supports the Data Length Extension
		 * feature, enable the corresponding event.
		 */
		if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
			events[0] |= 0x40;	/* LE Data Length Change */

635 636 637 638 639 640 641 642
		/* If the controller supports Extended Scanner Filter
		 * Policies, enable the correspondig event.
		 */
		if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
			events[1] |= 0x04;	/* LE Direct Advertising
						 * Report
						 */

643 644 645 646 647 648 649 650
		/* If the controller supports Channel Selection Algorithm #2
		 * feature, enable the corresponding event.
		 */
		if (hdev->le_features[1] & HCI_LE_CHAN_SEL_ALG2)
			events[2] |= 0x08;	/* LE Channel Selection
						 * Algorithm
						 */

651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678
		/* If the controller supports the LE Set Scan Enable command,
		 * enable the corresponding advertising report event.
		 */
		if (hdev->commands[26] & 0x08)
			events[0] |= 0x02;	/* LE Advertising Report */

		/* If the controller supports the LE Create Connection
		 * command, enable the corresponding event.
		 */
		if (hdev->commands[26] & 0x10)
			events[0] |= 0x01;	/* LE Connection Complete */

		/* If the controller supports the LE Connection Update
		 * command, enable the corresponding event.
		 */
		if (hdev->commands[27] & 0x04)
			events[0] |= 0x04;	/* LE Connection Update
						 * Complete
						 */

		/* If the controller supports the LE Read Remote Used Features
		 * command, enable the corresponding event.
		 */
		if (hdev->commands[27] & 0x20)
			events[0] |= 0x08;	/* LE Read Remote Used
						 * Features Complete
						 */

679 680 681 682 683 684 685 686 687 688 689 690 691 692
		/* If the controller supports the LE Read Local P-256
		 * Public Key command, enable the corresponding event.
		 */
		if (hdev->commands[34] & 0x02)
			events[0] |= 0x80;	/* LE Read Local P-256
						 * Public Key Complete
						 */

		/* If the controller supports the LE Generate DHKey
		 * command, enable the corresponding event.
		 */
		if (hdev->commands[34] & 0x04)
			events[1] |= 0x01;	/* LE Generate DHKey Complete */

693 694 695 696 697 698
		/* If the controller supports the LE Set Default PHY or
		 * LE Set PHY commands, enable the corresponding event.
		 */
		if (hdev->commands[35] & (0x20 | 0x40))
			events[1] |= 0x08;        /* LE PHY Update Complete */

699 700 701 702 703 704 705 706 707
		/* If the controller supports LE Set Extended Scan Parameters
		 * and LE Set Extended Scan Enable commands, enable the
		 * corresponding event.
		 */
		if (use_ext_scan(hdev))
			events[1] |= 0x10;	/* LE Extended Advertising
						 * Report
						 */

708 709 710 711 712 713 714 715
		/* If the controller supports the LE Extended Create Connection
		 * command, enable the corresponding event.
		 */
		if (use_ext_conn(hdev))
			events[1] |= 0x02;      /* LE Enhanced Connection
						 * Complete
						 */

716 717 718 719 720 721 722 723
		/* If the controller supports the LE Extended Advertising
		 * command, enable the corresponding event.
		 */
		if (ext_adv_capable(hdev))
			events[2] |= 0x02;	/* LE Advertising Set
						 * Terminated
						 */

724 725 726
		hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
			    events);

727 728 729 730 731 732 733 734
		/* Read LE Advertising Channel TX Power */
		if ((hdev->commands[25] & 0x40) && !ext_adv_capable(hdev)) {
			/* HCI TS spec forbids mixing of legacy and extended
			 * advertising commands wherein READ_ADV_TX_POWER is
			 * also included. So do not call it if extended adv
			 * is supported otherwise controller will return
			 * COMMAND_DISALLOWED for extended commands.
			 */
735 736 737
			hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
		}

738 739 740 741 742 743 744 745 746 747 748
		if (hdev->commands[26] & 0x40) {
			/* Read LE White List Size */
			hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
				    0, NULL);
		}

		if (hdev->commands[26] & 0x80) {
			/* Clear LE White List */
			hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
		}

749 750 751 752 753 754
		if (hdev->commands[34] & 0x40) {
			/* Read LE Resolving List Size */
			hci_req_add(req, HCI_OP_LE_READ_RESOLV_LIST_SIZE,
				    0, NULL);
		}

755 756 757 758 759
		if (hdev->commands[34] & 0x20) {
			/* Clear LE Resolving List */
			hci_req_add(req, HCI_OP_LE_CLEAR_RESOLV_LIST, 0, NULL);
		}

760 761 762 763 764 765 766 767
		if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
			/* Read LE Maximum Data Length */
			hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);

			/* Read LE Suggested Default Data Length */
			hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
		}

768 769 770 771 772 773
		if (ext_adv_capable(hdev)) {
			/* Read LE Number of Supported Advertising Sets */
			hci_req_add(req, HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
				    0, NULL);
		}

774
		hci_set_le_support(req);
775
	}
776 777 778 779 780 781 782 783 784

	/* Read features beyond page 1 if available */
	for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
		struct hci_cp_read_local_ext_features cp;

		cp.page = p;
		hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
			    sizeof(cp), &cp);
	}
785 786

	return 0;
787 788
}

789
static int hci_init4_req(struct hci_request *req, unsigned long opt)
790 791 792
{
	struct hci_dev *hdev = req->hdev;

793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815
	/* Some Broadcom based Bluetooth controllers do not support the
	 * Delete Stored Link Key command. They are clearly indicating its
	 * absence in the bit mask of supported commands.
	 *
	 * Check the supported commands and only if the the command is marked
	 * as supported send it. If not supported assume that the controller
	 * does not have actual support for stored link keys which makes this
	 * command redundant anyway.
	 *
	 * Some controllers indicate that they support handling deleting
	 * stored link keys, but they don't. The quirk lets a driver
	 * just disable this command.
	 */
	if (hdev->commands[6] & 0x80 &&
	    !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
		struct hci_cp_delete_stored_link_key cp;

		bacpy(&cp.bdaddr, BDADDR_ANY);
		cp.delete_all = 0x01;
		hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
			    sizeof(cp), &cp);
	}

816 817 818 819
	/* Set event mask page 2 if the HCI command for it is supported */
	if (hdev->commands[22] & 0x04)
		hci_set_event_mask_page_2(req);

820 821 822 823
	/* Read local codec list if the HCI command is supported */
	if (hdev->commands[29] & 0x20)
		hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);

824 825 826 827
	/* Get MWS transport configuration if the HCI command is supported */
	if (hdev->commands[30] & 0x08)
		hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);

828
	/* Check for Synchronization Train support */
829
	if (lmp_sync_train_capable(hdev))
830
		hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
831 832

	/* Enable Secure Connections if supported and configured */
833
	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
834
	    bredr_sc_enabled(hdev)) {
835
		u8 support = 0x01;
836

837 838 839
		hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
			    sizeof(support), &support);
	}
840

841 842 843 844
	/* Set Suggested Default Data Length to maximum if supported */
	if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
		struct hci_cp_le_write_def_data_len cp;

845 846
		cp.tx_len = cpu_to_le16(hdev->le_max_tx_len);
		cp.tx_time = cpu_to_le16(hdev->le_max_tx_time);
847 848 849
		hci_req_add(req, HCI_OP_LE_WRITE_DEF_DATA_LEN, sizeof(cp), &cp);
	}

850 851 852 853
	/* Set Default PHY parameters if command is supported */
	if (hdev->commands[35] & 0x20) {
		struct hci_cp_le_set_default_phy cp;

854 855 856
		cp.all_phys = 0x00;
		cp.tx_phys = hdev->le_tx_def_phys;
		cp.rx_phys = hdev->le_rx_def_phys;
857 858 859 860

		hci_req_add(req, HCI_OP_LE_SET_DEFAULT_PHY, sizeof(cp), &cp);
	}

861
	return 0;
862 863
}

864 865 866 867
static int __hci_init(struct hci_dev *hdev)
{
	int err;

868
	err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT, NULL);
869 870 871
	if (err < 0)
		return err;

872 873
	if (hci_dev_test_flag(hdev, HCI_SETUP))
		hci_debugfs_create_basic(hdev);
874

875
	err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT, NULL);
876 877 878
	if (err < 0)
		return err;

879
	/* HCI_PRIMARY covers both single-mode LE, BR/EDR and dual-mode
880
	 * BR/EDR/LE type controllers. AMP controllers only need the
881
	 * first two stages of init.
882
	 */
883
	if (hdev->dev_type != HCI_PRIMARY)
884 885
		return 0;

886
	err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT, NULL);
887 888 889
	if (err < 0)
		return err;

890
	err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT, NULL);
891 892 893
	if (err < 0)
		return err;

894 895 896 897 898 899 900 901 902 903 904
	/* This function is only called when the controller is actually in
	 * configured state. When the controller is marked as unconfigured,
	 * this initialization procedure is not run.
	 *
	 * It means that it is possible that a controller runs through its
	 * setup phase and then discovers missing settings. If that is the
	 * case, then this function will not be called. It then will only
	 * be called during the config phase.
	 *
	 * So only when in setup phase or config phase, create the debugfs
	 * entries and register the SMP channels.
905
	 */
906 907
	if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
	    !hci_dev_test_flag(hdev, HCI_CONFIG))
908 909
		return 0;

910 911
	hci_debugfs_create_common(hdev);

912
	if (lmp_bredr_capable(hdev))
913
		hci_debugfs_create_bredr(hdev);
914

915
	if (lmp_le_capable(hdev))
916
		hci_debugfs_create_le(hdev);
917

918
	return 0;
919 920
}

921
static int hci_init0_req(struct hci_request *req, unsigned long opt)
922 923 924 925 926 927 928 929 930 931 932 933 934 935 936
{
	struct hci_dev *hdev = req->hdev;

	BT_DBG("%s %ld", hdev->name, opt);

	/* Reset */
	if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
		hci_reset_req(req, 0);

	/* Read Local Version */
	hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);

	/* Read BD Address */
	if (hdev->set_bdaddr)
		hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
937 938

	return 0;
939 940 941 942 943 944
}

static int __hci_unconf_init(struct hci_dev *hdev)
{
	int err;

945 946 947
	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
		return 0;

948
	err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT, NULL);
949 950 951
	if (err < 0)
		return err;

952 953 954
	if (hci_dev_test_flag(hdev, HCI_SETUP))
		hci_debugfs_create_basic(hdev);

955 956 957
	return 0;
}

958
static int hci_scan_req(struct hci_request *req, unsigned long opt)
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959 960 961
{
	__u8 scan = opt;

962
	BT_DBG("%s %x", req->hdev->name, scan);
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963 964

	/* Inquiry and Page scans */
965
	hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
966
	return 0;
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967 968
}

969
static int hci_auth_req(struct hci_request *req, unsigned long opt)
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970 971 972
{
	__u8 auth = opt;

973
	BT_DBG("%s %x", req->hdev->name, auth);
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974 975

	/* Authentication */
976
	hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
977
	return 0;
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978 979
}

980
static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
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981 982 983
{
	__u8 encrypt = opt;

984
	BT_DBG("%s %x", req->hdev->name, encrypt);
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985

986
	/* Encryption */
987
	hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
988
	return 0;
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989 990
}

991
static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
992 993 994
{
	__le16 policy = cpu_to_le16(opt);

995
	BT_DBG("%s %x", req->hdev->name, policy);
996 997

	/* Default link policy */
998
	hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
999
	return 0;
1000 1001
}

1002
/* Get HCI device by index.
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1003 1004 1005
 * Device is held on return. */
struct hci_dev *hci_dev_get(int index)
{
1006
	struct hci_dev *hdev = NULL, *d;
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1007 1008 1009 1010 1011 1012 1013

	BT_DBG("%d", index);

	if (index < 0)
		return NULL;

	read_lock(&hci_dev_list_lock);
1014
	list_for_each_entry(d, &hci_dev_list, list) {
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1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
		if (d->id == index) {
			hdev = hci_dev_hold(d);
			break;
		}
	}
	read_unlock(&hci_dev_list_lock);
	return hdev;
}

/* ---- Inquiry support ---- */
1025

1026 1027 1028 1029
bool hci_discovery_active(struct hci_dev *hdev)
{
	struct discovery_state *discov = &hdev->discovery;

1030
	switch (discov->state) {
1031
	case DISCOVERY_FINDING:
1032
	case DISCOVERY_RESOLVING:
1033 1034
		return true;

1035 1036 1037
	default:
		return false;
	}
1038 1039
}

1040 1041
void hci_discovery_set_state(struct hci_dev *hdev, int state)
{
1042 1043
	int old_state = hdev->discovery.state;

1044 1045
	BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);

1046
	if (old_state == state)
1047 1048
		return;

1049 1050
	hdev->discovery.state = state;

1051 1052
	switch (state) {
	case DISCOVERY_STOPPED:
1053 1054
		hci_update_background_scan(hdev);

1055
		if (old_state != DISCOVERY_STARTING)
1056
			mgmt_discovering(hdev, 0);
1057 1058 1059
		break;
	case DISCOVERY_STARTING:
		break;
1060
	case DISCOVERY_FINDING:
1061 1062
		mgmt_discovering(hdev, 1);
		break;
1063 1064
	case DISCOVERY_RESOLVING:
		break;
1065 1066 1067 1068 1069
	case DISCOVERY_STOPPING:
		break;
	}
}

1070
void hci_inquiry_cache_flush(struct hci_dev *hdev)
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1071
{
1072
	struct discovery_state *cache = &hdev->discovery;
1073
	struct inquiry_entry *p, *n;
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1074

1075 1076
	list_for_each_entry_safe(p, n, &cache->all, all) {
		list_del(&p->all);
1077
		kfree(p);
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1078
	}
1079 1080 1081

	INIT_LIST_HEAD(&cache->unknown);
	INIT_LIST_HEAD(&cache->resolve);
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1082 1083
}

1084 1085
struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
					       bdaddr_t *bdaddr)
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1086
{
1087
	struct discovery_state *cache = &hdev->discovery;
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1088 1089
	struct inquiry_entry *e;

1090
	BT_DBG("cache %p, %pMR", cache, bdaddr);
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1091

1092 1093 1094 1095 1096 1097 1098 1099 1100
	list_for_each_entry(e, &cache->all, all) {
		if (!bacmp(&e->data.bdaddr, bdaddr))
			return e;
	}

	return NULL;
}

struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
1101
						       bdaddr_t *bdaddr)
1102
{
1103
	struct discovery_state *cache = &hdev->discovery;
1104 1105
	struct inquiry_entry *e;

1106
	BT_DBG("cache %p, %pMR", cache, bdaddr);
1107 1108

	list_for_each_entry(e, &cache->unknown, list) {
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1109
		if (!bacmp(&e->data.bdaddr, bdaddr))
1110 1111 1112 1113
			return e;
	}

	return NULL;
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1114 1115
}

1116
struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1117 1118
						       bdaddr_t *bdaddr,
						       int state)
1119 1120 1121 1122
{
	struct discovery_state *cache = &hdev->discovery;
	struct inquiry_entry *e;

1123
	BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134

	list_for_each_entry(e, &cache->resolve, list) {
		if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
			return e;
		if (!bacmp(&e->data.bdaddr, bdaddr))
			return e;
	}

	return NULL;
}

1135
void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1136
				      struct inquiry_entry *ie)
1137 1138 1139 1140 1141 1142 1143 1144 1145
{
	struct discovery_state *cache = &hdev->discovery;
	struct list_head *pos = &cache->resolve;
	struct inquiry_entry *p;

	list_del(&ie->list);

	list_for_each_entry(p, &cache->resolve, list) {
		if (p->name_state != NAME_PENDING &&
1146
		    abs(p->data.rssi) >= abs(ie->data.rssi))
1147 1148 1149 1150 1151 1152 1153
			break;
		pos = &p->list;
	}

	list_add(&ie->list, pos);
}

1154 1155
u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
			     bool name_known)
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1156
{
1157
	struct discovery_state *cache = &hdev->discovery;
1158
	struct inquiry_entry *ie;
1159
	u32 flags = 0;
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1160

1161
	BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
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1162

1163
	hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1164

1165 1166
	if (!data->ssp_mode)
		flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1167

1168
	ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1169
	if (ie) {
1170 1171
		if (!ie->data.ssp_mode)
			flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1172

1173
		if (ie->name_state == NAME_NEEDED &&
1174
		    data->rssi != ie->data.rssi) {
1175 1176 1177 1178
			ie->data.rssi = data->rssi;
			hci_inquiry_cache_update_resolve(hdev, ie);
		}

1179
		goto update;
1180
	}
1181 1182

	/* Entry not in the cache. Add new one. */
1183
	ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1184 1185 1186 1187
	if (!ie) {
		flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
		goto done;
	}
1188 1189 1190 1191 1192 1193 1194 1195 1196

	list_add(&ie->all, &cache->all);

	if (name_known) {
		ie->name_state = NAME_KNOWN;
	} else {
		ie->name_state = NAME_NOT_KNOWN;
		list_add(&ie->list, &cache->unknown);
	}
1197

1198 1199
update:
	if (name_known && ie->name_state != NAME_KNOWN &&
1200
	    ie->name_state != NAME_PENDING) {
1201 1202
		ie->name_state = NAME_KNOWN;
		list_del(&ie->list);
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1203 1204
	}

1205 1206
	memcpy(&ie->data, data, sizeof(*data));
	ie->timestamp = jiffies;
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1207
	cache->timestamp = jiffies;
1208 1209

	if (ie->name_state == NAME_NOT_KNOWN)
1210
		flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1211

1212 1213
done:
	return flags;
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1214 1215 1216 1217
}

static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
{
1218
	struct discovery_state *cache = &hdev->discovery;
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1219 1220 1221 1222
	struct inquiry_info *info = (struct inquiry_info *) buf;
	struct inquiry_entry *e;
	int copied = 0;

1223
	list_for_each_entry(e, &cache->all, all) {
L
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1224
		struct inquiry_data *data = &e->data;
1225 1226 1227 1228

		if (copied >= num)
			break;

L
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1229 1230 1231 1232 1233 1234
		bacpy(&info->bdaddr, &data->bdaddr);
		info->pscan_rep_mode	= data->pscan_rep_mode;
		info->pscan_period_mode	= data->pscan_period_mode;
		info->pscan_mode	= data->pscan_mode;
		memcpy(info->dev_class, data->dev_class, 3);
		info->clock_offset	= data->clock_offset;
1235

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1236
		info++;
1237
		copied++;
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1238 1239 1240 1241 1242 1243
	}

	BT_DBG("cache %p, copied %d", cache, copied);
	return copied;
}

1244
static int hci_inq_req(struct hci_request *req, unsigned long opt)
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1245 1246
{
	struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1247
	struct hci_dev *hdev = req->hdev;
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1248 1249 1250 1251 1252
	struct hci_cp_inquiry cp;

	BT_DBG("%s", hdev->name);

	if (test_bit(HCI_INQUIRY, &hdev->flags))
1253
		return 0;
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1254 1255 1256 1257 1258

	/* Start Inquiry */
	memcpy(&cp.lap, &ir->lap, 3);
	cp.length  = ir->length;
	cp.num_rsp = ir->num_rsp;
1259
	hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
1260 1261

	return 0;
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1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
}

int hci_inquiry(void __user *arg)
{
	__u8 __user *ptr = arg;
	struct hci_inquiry_req ir;
	struct hci_dev *hdev;
	int err = 0, do_inquiry = 0, max_rsp;
	long timeo;
	__u8 *buf;

	if (copy_from_user(&ir, ptr, sizeof(ir)))
		return -EFAULT;

1276 1277
	hdev = hci_dev_get(ir.dev_id);
	if (!hdev)
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1278 1279
		return -ENODEV;

1280
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1281 1282 1283 1284
		err = -EBUSY;
		goto done;
	}

1285
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1286 1287 1288 1289
		err = -EOPNOTSUPP;
		goto done;
	}

1290
	if (hdev->dev_type != HCI_PRIMARY) {
1291 1292 1293 1294
		err = -EOPNOTSUPP;
		goto done;
	}

1295
	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1296 1297 1298 1299
		err = -EOPNOTSUPP;
		goto done;
	}

1300
	hci_dev_lock(hdev);
1301
	if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1302
	    inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1303
		hci_inquiry_cache_flush(hdev);
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1304 1305
		do_inquiry = 1;
	}
1306
	hci_dev_unlock(hdev);
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1307

1308
	timeo = ir.length * msecs_to_jiffies(2000);
1309 1310

	if (do_inquiry) {
1311
		err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
1312
				   timeo, NULL);
1313 1314
		if (err < 0)
			goto done;
1315 1316 1317 1318

		/* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
		 * cleared). If it is interrupted by a signal, return -EINTR.
		 */
1319
		if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1320 1321
				TASK_INTERRUPTIBLE))
			return -EINTR;
1322
	}
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1323

1324 1325 1326
	/* for unlimited number of responses we will use buffer with
	 * 255 entries
	 */
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1327 1328 1329 1330 1331
	max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;

	/* cache_dump can't sleep. Therefore we allocate temp buffer and then
	 * copy it to the user space.
	 */
1332
	buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
1333
	if (!buf) {
L
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1334 1335 1336 1337
		err = -ENOMEM;
		goto done;
	}

1338
	hci_dev_lock(hdev);
L
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1339
	ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1340
	hci_dev_unlock(hdev);
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1341 1342 1343 1344 1345 1346

	BT_DBG("num_rsp %d", ir.num_rsp);

	if (!copy_to_user(ptr, &ir, sizeof(ir))) {
		ptr += sizeof(ir);
		if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
1347
				 ir.num_rsp))
L
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1348
			err = -EFAULT;
1349
	} else
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1350 1351 1352 1353 1354 1355 1356 1357 1358
		err = -EFAULT;

	kfree(buf);

done:
	hci_dev_put(hdev);
	return err;
}

1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
/**
 * hci_dev_get_bd_addr_from_property - Get the Bluetooth Device Address
 *				       (BD_ADDR) for a HCI device from
 *				       a firmware node property.
 * @hdev:	The HCI device
 *
 * Search the firmware node for 'local-bd-address'.
 *
 * All-zero BD addresses are rejected, because those could be properties
 * that exist in the firmware tables, but were not updated by the firmware. For
 * example, the DTS could define 'local-bd-address', with zero BD addresses.
 */
static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
{
	struct fwnode_handle *fwnode = dev_fwnode(hdev->dev.parent);
	bdaddr_t ba;
	int ret;

	ret = fwnode_property_read_u8_array(fwnode, "local-bd-address",
					    (u8 *)&ba, sizeof(ba));
	if (ret < 0 || !bacmp(&ba, BDADDR_ANY))
		return;

	bacpy(&hdev->public_addr, &ba);
}

1385
static int hci_dev_do_open(struct hci_dev *hdev)
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1386 1387 1388 1389 1390
{
	int ret = 0;

	BT_DBG("%s %p", hdev->name, hdev);

1391
	hci_req_sync_lock(hdev);
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1392

1393
	if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1394 1395 1396 1397
		ret = -ENODEV;
		goto done;
	}

1398 1399
	if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1400 1401 1402
		/* Check for rfkill but allow the HCI setup stage to
		 * proceed (which in itself doesn't cause any RF activity).
		 */
1403
		if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1404 1405 1406 1407 1408 1409 1410 1411 1412
			ret = -ERFKILL;
			goto done;
		}

		/* Check for valid public address or a configured static
		 * random adddress, but let the HCI setup proceed to
		 * be able to determine if there is a public address
		 * or not.
		 *
1413 1414 1415 1416
		 * In case of user channel usage, it is not important
		 * if a public address or static random address is
		 * available.
		 *
1417 1418 1419
		 * This check is only valid for BR/EDR controllers
		 * since AMP controllers do not have an address.
		 */
1420
		if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1421
		    hdev->dev_type == HCI_PRIMARY &&
1422 1423 1424 1425 1426
		    !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
		    !bacmp(&hdev->static_addr, BDADDR_ANY)) {
			ret = -EADDRNOTAVAIL;
			goto done;
		}
1427 1428
	}

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1429 1430 1431 1432 1433 1434 1435 1436 1437 1438
	if (test_bit(HCI_UP, &hdev->flags)) {
		ret = -EALREADY;
		goto done;
	}

	if (hdev->open(hdev)) {
		ret = -EIO;
		goto done;
	}

1439
	set_bit(HCI_RUNNING, &hdev->flags);
1440
	hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1441

1442 1443 1444
	atomic_set(&hdev->cmd_cnt, 1);
	set_bit(HCI_INIT, &hdev->flags);

1445 1446
	if (hci_dev_test_flag(hdev, HCI_SETUP) ||
	    test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
1447 1448
		bool invalid_bdaddr;

1449 1450
		hci_sock_dev_event(hdev, HCI_DEV_SETUP);

1451 1452
		if (hdev->setup)
			ret = hdev->setup(hdev);
1453

1454 1455 1456 1457 1458 1459 1460
		/* The transport driver can set the quirk to mark the
		 * BD_ADDR invalid before creating the HCI device or in
		 * its setup callback.
		 */
		invalid_bdaddr = test_bit(HCI_QUIRK_INVALID_BDADDR,
					  &hdev->quirks);

1461 1462 1463 1464 1465 1466 1467 1468
		if (ret)
			goto setup_failed;

		if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
			if (!bacmp(&hdev->public_addr, BDADDR_ANY))
				hci_dev_get_bd_addr_from_property(hdev);

			if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
1469
			    hdev->set_bdaddr) {
1470 1471
				ret = hdev->set_bdaddr(hdev,
						       &hdev->public_addr);
1472 1473 1474 1475 1476 1477 1478 1479 1480

				/* If setting of the BD_ADDR from the device
				 * property succeeds, then treat the address
				 * as valid even if the invalid BD_ADDR
				 * quirk indicates otherwise.
				 */
				if (!ret)
					invalid_bdaddr = false;
			}
1481 1482 1483
		}

setup_failed:
1484 1485 1486
		/* The transport driver can set these quirks before
		 * creating the HCI device or in its setup callback.
		 *
1487 1488 1489 1490
		 * For the invalid BD_ADDR quirk it is possible that
		 * it becomes a valid address if the bootloader does
		 * provide it (see above).
		 *
1491 1492 1493
		 * In case any of them is set, the controller has to
		 * start up as unconfigured.
		 */
1494
		if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
1495
		    invalid_bdaddr)
1496
			hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1497

1498 1499 1500 1501 1502 1503 1504 1505
		/* For an unconfigured controller it is required to
		 * read at least the version information provided by
		 * the Read Local Version Information command.
		 *
		 * If the set_bdaddr driver callback is provided, then
		 * also the original Bluetooth public device address
		 * will be read using the Read BD Address command.
		 */
1506
		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1507
			ret = __hci_unconf_init(hdev);
1508 1509
	}

1510
	if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1511 1512 1513 1514 1515 1516 1517
		/* If public address change is configured, ensure that
		 * the address gets programmed. If the driver does not
		 * support changing the public address, fail the power
		 * on procedure.
		 */
		if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
		    hdev->set_bdaddr)
1518 1519 1520 1521 1522
			ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
		else
			ret = -EADDRNOTAVAIL;
	}

1523
	if (!ret) {
1524
		if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1525
		    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1526
			ret = __hci_init(hdev);
1527 1528 1529
			if (!ret && hdev->post_init)
				ret = hdev->post_init(hdev);
		}
L
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1530 1531
	}

1532 1533 1534 1535 1536
	/* If the HCI Reset command is clearing all diagnostic settings,
	 * then they need to be reprogrammed after the init procedure
	 * completed.
	 */
	if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
1537
	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1538 1539 1540
	    hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
		ret = hdev->set_diag(hdev, true);

1541 1542
	clear_bit(HCI_INIT, &hdev->flags);

L
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1543 1544
	if (!ret) {
		hci_dev_hold(hdev);
1545
		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
1546
		hci_adv_instances_set_rpa_expired(hdev, true);
L
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1547
		set_bit(HCI_UP, &hdev->flags);
1548
		hci_sock_dev_event(hdev, HCI_DEV_UP);
1549
		hci_leds_update_powered(hdev, true);
1550 1551 1552 1553
		if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
		    !hci_dev_test_flag(hdev, HCI_CONFIG) &&
		    !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
		    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1554
		    hci_dev_test_flag(hdev, HCI_MGMT) &&
1555
		    hdev->dev_type == HCI_PRIMARY) {
1556 1557
			ret = __hci_req_hci_power_on(hdev);
			mgmt_power_on(hdev, ret);
1558
		}
1559
	} else {
L
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1560
		/* Init failed, cleanup */
1561
		flush_work(&hdev->tx_work);
1562
		flush_work(&hdev->cmd_work);
1563
		flush_work(&hdev->rx_work);
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1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575

		skb_queue_purge(&hdev->cmd_q);
		skb_queue_purge(&hdev->rx_q);

		if (hdev->flush)
			hdev->flush(hdev);

		if (hdev->sent_cmd) {
			kfree_skb(hdev->sent_cmd);
			hdev->sent_cmd = NULL;
		}

1576
		clear_bit(HCI_RUNNING, &hdev->flags);
1577
		hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1578

L
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1579
		hdev->close(hdev);
1580
		hdev->flags &= BIT(HCI_RAW);
L
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1581 1582 1583
	}

done:
1584
	hci_req_sync_unlock(hdev);
L
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1585 1586 1587
	return ret;
}

1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598
/* ---- HCI ioctl helpers ---- */

int hci_dev_open(__u16 dev)
{
	struct hci_dev *hdev;
	int err;

	hdev = hci_dev_get(dev);
	if (!hdev)
		return -ENODEV;

1599
	/* Devices that are marked as unconfigured can only be powered
1600 1601 1602 1603 1604 1605 1606 1607
	 * up as user channel. Trying to bring them up as normal devices
	 * will result into a failure. Only user channel operation is
	 * possible.
	 *
	 * When this function is called for a user channel, the flag
	 * HCI_USER_CHANNEL will be set first before attempting to
	 * open the device.
	 */
1608 1609
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1610 1611 1612 1613
		err = -EOPNOTSUPP;
		goto done;
	}

1614 1615 1616 1617 1618
	/* We need to ensure that no other power on/off work is pending
	 * before proceeding to call hci_dev_do_open. This is
	 * particularly important if the setup procedure has not yet
	 * completed.
	 */
1619
	if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1620 1621
		cancel_delayed_work(&hdev->power_off);

1622 1623 1624 1625
	/* After this call it is guaranteed that the setup procedure
	 * has finished. This means that error conditions like RFKILL
	 * or no valid public or static random address apply.
	 */
1626 1627
	flush_workqueue(hdev->req_workqueue);

1628
	/* For controllers not using the management interface and that
1629
	 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1630 1631 1632 1633
	 * so that pairing works for them. Once the management interface
	 * is in use this bit will be cleared again and userspace has
	 * to explicitly enable it.
	 */
1634 1635
	if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
	    !hci_dev_test_flag(hdev, HCI_MGMT))
1636
		hci_dev_set_flag(hdev, HCI_BONDABLE);
1637

1638 1639
	err = hci_dev_do_open(hdev);

1640
done:
1641 1642 1643 1644
	hci_dev_put(hdev);
	return err;
}

1645 1646 1647 1648 1649
/* This function requires the caller holds hdev->lock */
static void hci_pend_le_actions_clear(struct hci_dev *hdev)
{
	struct hci_conn_params *p;

1650 1651 1652
	list_for_each_entry(p, &hdev->le_conn_params, list) {
		if (p->conn) {
			hci_conn_drop(p->conn);
1653
			hci_conn_put(p->conn);
1654 1655
			p->conn = NULL;
		}
1656
		list_del_init(&p->action);
1657
	}
1658 1659 1660 1661

	BT_DBG("All LE pending actions cleared");
}

1662
int hci_dev_do_close(struct hci_dev *hdev)
L
Linus Torvalds 已提交
1663
{
1664 1665
	bool auto_off;

L
Linus Torvalds 已提交
1666 1667
	BT_DBG("%s %p", hdev->name, hdev);

1668
	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1669
	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1670
	    test_bit(HCI_UP, &hdev->flags)) {
1671 1672 1673 1674 1675
		/* Execute vendor specific shutdown routine */
		if (hdev->shutdown)
			hdev->shutdown(hdev);
	}

1676 1677
	cancel_delayed_work(&hdev->power_off);

1678
	hci_request_cancel_all(hdev);
1679
	hci_req_sync_lock(hdev);
L
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1680 1681

	if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1682
		cancel_delayed_work_sync(&hdev->cmd_timer);
1683
		hci_req_sync_unlock(hdev);
L
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1684 1685 1686
		return 0;
	}

1687 1688
	hci_leds_update_powered(hdev, false);

1689 1690
	/* Flush RX and TX works */
	flush_work(&hdev->tx_work);
1691
	flush_work(&hdev->rx_work);
L
Linus Torvalds 已提交
1692

1693 1694
	if (hdev->discov_timeout > 0) {
		hdev->discov_timeout = 0;
1695 1696
		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1697 1698
	}

1699
	if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1700 1701
		cancel_delayed_work(&hdev->service_cache);

1702 1703 1704
	if (hci_dev_test_flag(hdev, HCI_MGMT)) {
		struct adv_info *adv_instance;

1705
		cancel_delayed_work_sync(&hdev->rpa_expired);
1706

1707 1708 1709 1710
		list_for_each_entry(adv_instance, &hdev->adv_instances, list)
			cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
	}

1711 1712 1713 1714 1715
	/* Avoid potential lockdep warnings from the *_flush() calls by
	 * ensuring the workqueue is empty up front.
	 */
	drain_workqueue(hdev->workqueue);

1716
	hci_dev_lock(hdev);
1717

1718 1719
	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);

1720 1721
	auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);

1722
	if (!auto_off && hdev->dev_type == HCI_PRIMARY &&
1723
	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1724 1725
	    hci_dev_test_flag(hdev, HCI_MGMT))
		__mgmt_power_off(hdev);
1726

1727
	hci_inquiry_cache_flush(hdev);
1728
	hci_pend_le_actions_clear(hdev);
1729
	hci_conn_hash_flush(hdev);
1730
	hci_dev_unlock(hdev);
L
Linus Torvalds 已提交
1731

1732 1733
	smp_unregister(hdev);

1734
	hci_sock_dev_event(hdev, HCI_DEV_DOWN);
L
Linus Torvalds 已提交
1735 1736 1737 1738 1739 1740 1741

	if (hdev->flush)
		hdev->flush(hdev);

	/* Reset device */
	skb_queue_purge(&hdev->cmd_q);
	atomic_set(&hdev->cmd_cnt, 1);
1742 1743
	if (test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
	    !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
L
Linus Torvalds 已提交
1744
		set_bit(HCI_INIT, &hdev->flags);
1745
		__hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT, NULL);
L
Linus Torvalds 已提交
1746 1747 1748
		clear_bit(HCI_INIT, &hdev->flags);
	}

1749 1750
	/* flush cmd  work */
	flush_work(&hdev->cmd_work);
L
Linus Torvalds 已提交
1751 1752 1753 1754 1755 1756 1757 1758

	/* Drop queues */
	skb_queue_purge(&hdev->rx_q);
	skb_queue_purge(&hdev->cmd_q);
	skb_queue_purge(&hdev->raw_q);

	/* Drop last sent command */
	if (hdev->sent_cmd) {
1759
		cancel_delayed_work_sync(&hdev->cmd_timer);
L
Linus Torvalds 已提交
1760 1761 1762 1763
		kfree_skb(hdev->sent_cmd);
		hdev->sent_cmd = NULL;
	}

1764
	clear_bit(HCI_RUNNING, &hdev->flags);
1765
	hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1766

L
Linus Torvalds 已提交
1767 1768 1769 1770
	/* After this point our queues are empty
	 * and no tasks are scheduled. */
	hdev->close(hdev);

1771
	/* Clear flags */
1772
	hdev->flags &= BIT(HCI_RAW);
1773
	hci_dev_clear_volatile_flags(hdev);
1774

1775
	/* Controller radio is available but is currently powered down */
1776
	hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1777

1778
	memset(hdev->eir, 0, sizeof(hdev->eir));
1779
	memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1780
	bacpy(&hdev->random_addr, BDADDR_ANY);
1781

1782
	hci_req_sync_unlock(hdev);
L
Linus Torvalds 已提交
1783 1784 1785 1786 1787 1788 1789 1790 1791 1792

	hci_dev_put(hdev);
	return 0;
}

int hci_dev_close(__u16 dev)
{
	struct hci_dev *hdev;
	int err;

1793 1794
	hdev = hci_dev_get(dev);
	if (!hdev)
L
Linus Torvalds 已提交
1795
		return -ENODEV;
1796

1797
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1798 1799 1800 1801
		err = -EBUSY;
		goto done;
	}

1802
	if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1803 1804
		cancel_delayed_work(&hdev->power_off);

L
Linus Torvalds 已提交
1805
	err = hci_dev_do_close(hdev);
1806

1807
done:
L
Linus Torvalds 已提交
1808 1809 1810 1811
	hci_dev_put(hdev);
	return err;
}

1812
static int hci_dev_do_reset(struct hci_dev *hdev)
L
Linus Torvalds 已提交
1813
{
1814
	int ret;
L
Linus Torvalds 已提交
1815

1816
	BT_DBG("%s %p", hdev->name, hdev);
L
Linus Torvalds 已提交
1817

1818
	hci_req_sync_lock(hdev);
L
Linus Torvalds 已提交
1819 1820 1821 1822 1823

	/* Drop queues */
	skb_queue_purge(&hdev->rx_q);
	skb_queue_purge(&hdev->cmd_q);

1824 1825 1826 1827 1828
	/* Avoid potential lockdep warnings from the *_flush() calls by
	 * ensuring the workqueue is empty up front.
	 */
	drain_workqueue(hdev->workqueue);

1829
	hci_dev_lock(hdev);
1830
	hci_inquiry_cache_flush(hdev);
L
Linus Torvalds 已提交
1831
	hci_conn_hash_flush(hdev);
1832
	hci_dev_unlock(hdev);
L
Linus Torvalds 已提交
1833 1834 1835 1836

	if (hdev->flush)
		hdev->flush(hdev);

1837
	atomic_set(&hdev->cmd_cnt, 1);
1838
	hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
L
Linus Torvalds 已提交
1839

1840
	ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT, NULL);
L
Linus Torvalds 已提交
1841

1842
	hci_req_sync_unlock(hdev);
L
Linus Torvalds 已提交
1843 1844 1845
	return ret;
}

1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
int hci_dev_reset(__u16 dev)
{
	struct hci_dev *hdev;
	int err;

	hdev = hci_dev_get(dev);
	if (!hdev)
		return -ENODEV;

	if (!test_bit(HCI_UP, &hdev->flags)) {
		err = -ENETDOWN;
		goto done;
	}

1860
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1861 1862 1863 1864
		err = -EBUSY;
		goto done;
	}

1865
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876
		err = -EOPNOTSUPP;
		goto done;
	}

	err = hci_dev_do_reset(hdev);

done:
	hci_dev_put(hdev);
	return err;
}

L
Linus Torvalds 已提交
1877 1878 1879 1880 1881
int hci_dev_reset_stat(__u16 dev)
{
	struct hci_dev *hdev;
	int ret = 0;

1882 1883
	hdev = hci_dev_get(dev);
	if (!hdev)
L
Linus Torvalds 已提交
1884 1885
		return -ENODEV;

1886
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1887 1888 1889 1890
		ret = -EBUSY;
		goto done;
	}

1891
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1892 1893 1894 1895
		ret = -EOPNOTSUPP;
		goto done;
	}

L
Linus Torvalds 已提交
1896 1897
	memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));

1898
done:
L
Linus Torvalds 已提交
1899 1900 1901 1902
	hci_dev_put(hdev);
	return ret;
}

1903 1904
static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
{
1905
	bool conn_changed, discov_changed;
1906 1907 1908 1909

	BT_DBG("%s scan 0x%02x", hdev->name, scan);

	if ((scan & SCAN_PAGE))
1910 1911
		conn_changed = !hci_dev_test_and_set_flag(hdev,
							  HCI_CONNECTABLE);
1912
	else
1913 1914
		conn_changed = hci_dev_test_and_clear_flag(hdev,
							   HCI_CONNECTABLE);
1915

1916
	if ((scan & SCAN_INQUIRY)) {
1917 1918
		discov_changed = !hci_dev_test_and_set_flag(hdev,
							    HCI_DISCOVERABLE);
1919
	} else {
1920
		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1921 1922
		discov_changed = hci_dev_test_and_clear_flag(hdev,
							     HCI_DISCOVERABLE);
1923 1924
	}

1925
	if (!hci_dev_test_flag(hdev, HCI_MGMT))
1926 1927
		return;

1928 1929
	if (conn_changed || discov_changed) {
		/* In case this was disabled through mgmt */
1930
		hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1931

1932
		if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1933
			hci_req_update_adv_data(hdev, hdev->cur_adv_instance);
1934

1935
		mgmt_new_settings(hdev);
1936
	}
1937 1938
}

L
Linus Torvalds 已提交
1939 1940 1941 1942 1943 1944 1945 1946 1947
int hci_dev_cmd(unsigned int cmd, void __user *arg)
{
	struct hci_dev *hdev;
	struct hci_dev_req dr;
	int err = 0;

	if (copy_from_user(&dr, arg, sizeof(dr)))
		return -EFAULT;

1948 1949
	hdev = hci_dev_get(dr.dev_id);
	if (!hdev)
L
Linus Torvalds 已提交
1950 1951
		return -ENODEV;

1952
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1953 1954 1955 1956
		err = -EBUSY;
		goto done;
	}

1957
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1958 1959 1960 1961
		err = -EOPNOTSUPP;
		goto done;
	}

1962
	if (hdev->dev_type != HCI_PRIMARY) {
1963 1964 1965 1966
		err = -EOPNOTSUPP;
		goto done;
	}

1967
	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1968 1969 1970 1971
		err = -EOPNOTSUPP;
		goto done;
	}

L
Linus Torvalds 已提交
1972 1973
	switch (cmd) {
	case HCISETAUTH:
1974
		err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1975
				   HCI_INIT_TIMEOUT, NULL);
L
Linus Torvalds 已提交
1976 1977 1978 1979 1980 1981 1982 1983 1984 1985
		break;

	case HCISETENCRYPT:
		if (!lmp_encrypt_capable(hdev)) {
			err = -EOPNOTSUPP;
			break;
		}

		if (!test_bit(HCI_AUTH, &hdev->flags)) {
			/* Auth must be enabled first */
1986
			err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
1987
					   HCI_INIT_TIMEOUT, NULL);
L
Linus Torvalds 已提交
1988 1989 1990 1991
			if (err)
				break;
		}

1992
		err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
1993
				   HCI_INIT_TIMEOUT, NULL);
L
Linus Torvalds 已提交
1994 1995 1996
		break;

	case HCISETSCAN:
1997
		err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
1998
				   HCI_INIT_TIMEOUT, NULL);
1999

2000 2001
		/* Ensure that the connectable and discoverable states
		 * get correctly modified as this was a non-mgmt change.
2002
		 */
2003 2004
		if (!err)
			hci_update_scan_state(hdev, dr.dev_opt);
L
Linus Torvalds 已提交
2005 2006 2007
		break;

	case HCISETLINKPOL:
2008
		err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
2009
				   HCI_INIT_TIMEOUT, NULL);
L
Linus Torvalds 已提交
2010 2011 2012
		break;

	case HCISETLINKMODE:
2013 2014 2015 2016 2017
		hdev->link_mode = ((__u16) dr.dev_opt) &
					(HCI_LM_MASTER | HCI_LM_ACCEPT);
		break;

	case HCISETPTYPE:
2018 2019 2020
		if (hdev->pkt_type == (__u16) dr.dev_opt)
			break;

2021
		hdev->pkt_type = (__u16) dr.dev_opt;
2022
		mgmt_phy_configuration_changed(hdev, NULL);
L
Linus Torvalds 已提交
2023 2024 2025
		break;

	case HCISETACLMTU:
2026 2027
		hdev->acl_mtu  = *((__u16 *) &dr.dev_opt + 1);
		hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
L
Linus Torvalds 已提交
2028 2029 2030
		break;

	case HCISETSCOMTU:
2031 2032
		hdev->sco_mtu  = *((__u16 *) &dr.dev_opt + 1);
		hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
L
Linus Torvalds 已提交
2033 2034 2035 2036 2037 2038
		break;

	default:
		err = -EINVAL;
		break;
	}
2039

2040
done:
L
Linus Torvalds 已提交
2041 2042 2043 2044 2045 2046
	hci_dev_put(hdev);
	return err;
}

int hci_get_dev_list(void __user *arg)
{
2047
	struct hci_dev *hdev;
L
Linus Torvalds 已提交
2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
	struct hci_dev_list_req *dl;
	struct hci_dev_req *dr;
	int n = 0, size, err;
	__u16 dev_num;

	if (get_user(dev_num, (__u16 __user *) arg))
		return -EFAULT;

	if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
		return -EINVAL;

	size = sizeof(*dl) + dev_num * sizeof(*dr);

2061 2062
	dl = kzalloc(size, GFP_KERNEL);
	if (!dl)
L
Linus Torvalds 已提交
2063 2064 2065 2066
		return -ENOMEM;

	dr = dl->dev_req;

2067
	read_lock(&hci_dev_list_lock);
2068
	list_for_each_entry(hdev, &hci_dev_list, list) {
2069
		unsigned long flags = hdev->flags;
2070

2071 2072 2073 2074
		/* When the auto-off is configured it means the transport
		 * is running, but in that case still indicate that the
		 * device is actually down.
		 */
2075
		if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2076
			flags &= ~BIT(HCI_UP);
2077

L
Linus Torvalds 已提交
2078
		(dr + n)->dev_id  = hdev->id;
2079
		(dr + n)->dev_opt = flags;
2080

L
Linus Torvalds 已提交
2081 2082 2083
		if (++n >= dev_num)
			break;
	}
2084
	read_unlock(&hci_dev_list_lock);
L
Linus Torvalds 已提交
2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098

	dl->dev_num = n;
	size = sizeof(*dl) + n * sizeof(*dr);

	err = copy_to_user(arg, dl, size);
	kfree(dl);

	return err ? -EFAULT : 0;
}

int hci_get_dev_info(void __user *arg)
{
	struct hci_dev *hdev;
	struct hci_dev_info di;
2099
	unsigned long flags;
L
Linus Torvalds 已提交
2100 2101 2102 2103 2104
	int err = 0;

	if (copy_from_user(&di, arg, sizeof(di)))
		return -EFAULT;

2105 2106
	hdev = hci_dev_get(di.dev_id);
	if (!hdev)
L
Linus Torvalds 已提交
2107 2108
		return -ENODEV;

2109 2110 2111 2112
	/* When the auto-off is configured it means the transport
	 * is running, but in that case still indicate that the
	 * device is actually down.
	 */
2113
	if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2114 2115 2116
		flags = hdev->flags & ~BIT(HCI_UP);
	else
		flags = hdev->flags;
2117

L
Linus Torvalds 已提交
2118 2119
	strcpy(di.name, hdev->name);
	di.bdaddr   = hdev->bdaddr;
2120
	di.type     = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2121
	di.flags    = flags;
L
Linus Torvalds 已提交
2122
	di.pkt_type = hdev->pkt_type;
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133
	if (lmp_bredr_capable(hdev)) {
		di.acl_mtu  = hdev->acl_mtu;
		di.acl_pkts = hdev->acl_pkts;
		di.sco_mtu  = hdev->sco_mtu;
		di.sco_pkts = hdev->sco_pkts;
	} else {
		di.acl_mtu  = hdev->le_mtu;
		di.acl_pkts = hdev->le_pkts;
		di.sco_mtu  = 0;
		di.sco_pkts = 0;
	}
L
Linus Torvalds 已提交
2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
	di.link_policy = hdev->link_policy;
	di.link_mode   = hdev->link_mode;

	memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
	memcpy(&di.features, &hdev->features, sizeof(di.features));

	if (copy_to_user(arg, &di, sizeof(di)))
		err = -EFAULT;

	hci_dev_put(hdev);

	return err;
}

/* ---- Interface to HCI drivers ---- */

2150 2151 2152 2153 2154 2155
static int hci_rfkill_set_block(void *data, bool blocked)
{
	struct hci_dev *hdev = data;

	BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);

2156
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2157 2158
		return -EBUSY;

2159
	if (blocked) {
2160
		hci_dev_set_flag(hdev, HCI_RFKILLED);
2161 2162
		if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
		    !hci_dev_test_flag(hdev, HCI_CONFIG))
2163
			hci_dev_do_close(hdev);
2164
	} else {
2165
		hci_dev_clear_flag(hdev, HCI_RFKILLED);
2166
	}
2167 2168 2169 2170 2171 2172 2173 2174

	return 0;
}

static const struct rfkill_ops hci_rfkill_ops = {
	.set_block = hci_rfkill_set_block,
};

2175 2176 2177
static void hci_power_on(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2178
	int err;
2179 2180 2181

	BT_DBG("%s", hdev->name);

2182 2183 2184
	if (test_bit(HCI_UP, &hdev->flags) &&
	    hci_dev_test_flag(hdev, HCI_MGMT) &&
	    hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
2185
		cancel_delayed_work(&hdev->power_off);
2186 2187 2188 2189 2190 2191 2192
		hci_req_sync_lock(hdev);
		err = __hci_req_hci_power_on(hdev);
		hci_req_sync_unlock(hdev);
		mgmt_power_on(hdev, err);
		return;
	}

2193
	err = hci_dev_do_open(hdev);
2194
	if (err < 0) {
2195
		hci_dev_lock(hdev);
2196
		mgmt_set_powered_failed(hdev, err);
2197
		hci_dev_unlock(hdev);
2198
		return;
2199
	}
2200

2201 2202 2203 2204
	/* During the HCI setup phase, a few error conditions are
	 * ignored and they need to be checked now. If they are still
	 * valid, it is important to turn the device back off.
	 */
2205 2206
	if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
	    hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2207
	    (hdev->dev_type == HCI_PRIMARY &&
2208 2209
	     !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
	     !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2210
		hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2211
		hci_dev_do_close(hdev);
2212
	} else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2213 2214
		queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
				   HCI_AUTO_OFF_TIMEOUT);
2215
	}
2216

2217
	if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2218 2219 2220
		/* For unconfigured devices, set the HCI_RAW flag
		 * so that userspace can easily identify them.
		 */
2221
		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2222
			set_bit(HCI_RAW, &hdev->flags);
2223 2224 2225 2226 2227 2228 2229 2230 2231

		/* For fully configured devices, this will send
		 * the Index Added event. For unconfigured devices,
		 * it will send Unconfigued Index Added event.
		 *
		 * Devices with HCI_QUIRK_RAW_DEVICE are ignored
		 * and no event will be send.
		 */
		mgmt_index_added(hdev);
2232
	} else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2233 2234 2235
		/* When the controller is now configured, then it
		 * is important to clear the HCI_RAW flag.
		 */
2236
		if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2237 2238
			clear_bit(HCI_RAW, &hdev->flags);

2239 2240 2241 2242
		/* Powering on the controller with HCI_CONFIG set only
		 * happens with the transition from unconfigured to
		 * configured. This will send the Index Added event.
		 */
2243
		mgmt_index_added(hdev);
2244
	}
2245 2246 2247 2248
}

static void hci_power_off(struct work_struct *work)
{
2249
	struct hci_dev *hdev = container_of(work, struct hci_dev,
2250
					    power_off.work);
2251 2252 2253

	BT_DBG("%s", hdev->name);

2254
	hci_dev_do_close(hdev);
2255 2256
}

2257 2258 2259 2260 2261 2262 2263 2264 2265
static void hci_error_reset(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);

	BT_DBG("%s", hdev->name);

	if (hdev->hw_error)
		hdev->hw_error(hdev, hdev->hw_error_code);
	else
2266
		bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
2267 2268 2269 2270 2271 2272 2273

	if (hci_dev_do_close(hdev))
		return;

	hci_dev_do_open(hdev);
}

2274
void hci_uuids_clear(struct hci_dev *hdev)
2275
{
2276
	struct bt_uuid *uuid, *tmp;
2277

2278 2279
	list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
		list_del(&uuid->list);
2280 2281 2282 2283
		kfree(uuid);
	}
}

2284
void hci_link_keys_clear(struct hci_dev *hdev)
2285
{
2286
	struct link_key *key;
2287

2288
	list_for_each_entry(key, &hdev->link_keys, list) {
2289 2290
		list_del_rcu(&key->list);
		kfree_rcu(key, rcu);
2291 2292 2293
	}
}

2294
void hci_smp_ltks_clear(struct hci_dev *hdev)
2295
{
2296
	struct smp_ltk *k;
2297

2298
	list_for_each_entry(k, &hdev->long_term_keys, list) {
2299 2300
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2301 2302 2303
	}
}

2304 2305
void hci_smp_irks_clear(struct hci_dev *hdev)
{
2306
	struct smp_irk *k;
2307

2308
	list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
2309 2310
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2311 2312 2313
	}
}

2314 2315 2316 2317
void hci_blocked_keys_clear(struct hci_dev *hdev)
{
	struct blocked_key *b;

2318
	list_for_each_entry(b, &hdev->blocked_keys, list) {
2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329
		list_del_rcu(&b->list);
		kfree_rcu(b, rcu);
	}
}

bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
{
	bool blocked = false;
	struct blocked_key *b;

	rcu_read_lock();
2330
	list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340
		if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
			blocked = true;
			break;
		}
	}

	rcu_read_unlock();
	return blocked;
}

2341 2342
struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
2343
	struct link_key *k;
2344

2345 2346 2347 2348
	rcu_read_lock();
	list_for_each_entry_rcu(k, &hdev->link_keys, list) {
		if (bacmp(bdaddr, &k->bdaddr) == 0) {
			rcu_read_unlock();
2349 2350 2351 2352 2353 2354 2355 2356 2357 2358

			if (hci_is_blocked_key(hdev,
					       HCI_BLOCKED_KEY_TYPE_LINKKEY,
					       k->val)) {
				bt_dev_warn_ratelimited(hdev,
							"Link key blocked for %pMR",
							&k->bdaddr);
				return NULL;
			}

2359
			return k;
2360 2361 2362
		}
	}
	rcu_read_unlock();
2363 2364 2365 2366

	return NULL;
}

2367
static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2368
			       u8 key_type, u8 old_key_type)
2369 2370 2371
{
	/* Legacy key */
	if (key_type < 0x03)
2372
		return true;
2373 2374 2375

	/* Debug keys are insecure so don't store them persistently */
	if (key_type == HCI_LK_DEBUG_COMBINATION)
2376
		return false;
2377 2378 2379

	/* Changed combination key and there's no previous one */
	if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2380
		return false;
2381 2382 2383

	/* Security mode 3 case */
	if (!conn)
2384
		return true;
2385

2386 2387 2388 2389
	/* BR/EDR key derived using SC from an LE link */
	if (conn->type == LE_LINK)
		return true;

2390 2391
	/* Neither local nor remote side had no-bonding as requirement */
	if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2392
		return true;
2393 2394 2395

	/* Local side had dedicated bonding as requirement */
	if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2396
		return true;
2397 2398 2399

	/* Remote side had dedicated bonding as requirement */
	if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2400
		return true;
2401 2402 2403

	/* If none of the above criteria match, then don't store the key
	 * persistently */
2404
	return false;
2405 2406
}

2407
static u8 ltk_role(u8 type)
2408
{
2409 2410
	if (type == SMP_LTK)
		return HCI_ROLE_MASTER;
2411

2412
	return HCI_ROLE_SLAVE;
2413 2414
}

2415 2416
struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
			     u8 addr_type, u8 role)
2417
{
2418
	struct smp_ltk *k;
2419

2420 2421
	rcu_read_lock();
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2422 2423 2424
		if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
			continue;

2425
		if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
2426
			rcu_read_unlock();
2427 2428 2429 2430 2431 2432 2433 2434 2435

			if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
					       k->val)) {
				bt_dev_warn_ratelimited(hdev,
							"LTK blocked for %pMR",
							&k->bdaddr);
				return NULL;
			}

2436
			return k;
2437 2438 2439
		}
	}
	rcu_read_unlock();
2440 2441 2442 2443

	return NULL;
}

2444 2445
struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
{
2446
	struct smp_irk *irk_to_return = NULL;
2447 2448
	struct smp_irk *irk;

2449 2450 2451
	rcu_read_lock();
	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
		if (!bacmp(&irk->rpa, rpa)) {
2452 2453
			irk_to_return = irk;
			goto done;
2454
		}
2455 2456
	}

2457
	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2458
		if (smp_irk_matches(hdev, irk->val, rpa)) {
2459
			bacpy(&irk->rpa, rpa);
2460 2461
			irk_to_return = irk;
			goto done;
2462 2463
		}
	}
2464 2465 2466 2467 2468 2469 2470 2471 2472

done:
	if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
						irk_to_return->val)) {
		bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
					&irk_to_return->bdaddr);
		irk_to_return = NULL;
	}

2473
	rcu_read_unlock();
2474

2475
	return irk_to_return;
2476 2477 2478 2479 2480
}

struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
				     u8 addr_type)
{
2481
	struct smp_irk *irk_to_return = NULL;
2482 2483
	struct smp_irk *irk;

2484 2485 2486 2487
	/* Identity Address must be public or static random */
	if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
		return NULL;

2488 2489
	rcu_read_lock();
	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2490
		if (addr_type == irk->addr_type &&
2491
		    bacmp(bdaddr, &irk->bdaddr) == 0) {
2492 2493
			irk_to_return = irk;
			goto done;
2494
		}
2495
	}
2496 2497 2498 2499 2500 2501 2502 2503 2504 2505

done:

	if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
						irk_to_return->val)) {
		bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
					&irk_to_return->bdaddr);
		irk_to_return = NULL;
	}

2506
	rcu_read_unlock();
2507

2508
	return irk_to_return;
2509 2510
}

2511
struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2512 2513
				  bdaddr_t *bdaddr, u8 *val, u8 type,
				  u8 pin_len, bool *persistent)
2514 2515
{
	struct link_key *key, *old_key;
2516
	u8 old_key_type;
2517 2518 2519 2520 2521 2522

	old_key = hci_find_link_key(hdev, bdaddr);
	if (old_key) {
		old_key_type = old_key->type;
		key = old_key;
	} else {
2523
		old_key_type = conn ? conn->key_type : 0xff;
2524
		key = kzalloc(sizeof(*key), GFP_KERNEL);
2525
		if (!key)
2526
			return NULL;
2527
		list_add_rcu(&key->list, &hdev->link_keys);
2528 2529
	}

2530
	BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2531

2532 2533 2534 2535
	/* Some buggy controller combinations generate a changed
	 * combination key for legacy pairing even when there's no
	 * previous key */
	if (type == HCI_LK_CHANGED_COMBINATION &&
2536
	    (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2537
		type = HCI_LK_COMBINATION;
2538 2539 2540
		if (conn)
			conn->key_type = type;
	}
2541

2542
	bacpy(&key->bdaddr, bdaddr);
2543
	memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2544 2545
	key->pin_len = pin_len;

2546
	if (type == HCI_LK_CHANGED_COMBINATION)
2547
		key->type = old_key_type;
2548 2549 2550
	else
		key->type = type;

2551 2552 2553
	if (persistent)
		*persistent = hci_persistent_key(hdev, conn, type,
						 old_key_type);
2554

2555
	return key;
2556 2557
}

2558
struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2559
			    u8 addr_type, u8 type, u8 authenticated,
2560
			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2561
{
2562
	struct smp_ltk *key, *old_key;
2563
	u8 role = ltk_role(type);
2564

2565
	old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2566
	if (old_key)
2567
		key = old_key;
2568
	else {
2569
		key = kzalloc(sizeof(*key), GFP_KERNEL);
2570
		if (!key)
2571
			return NULL;
2572
		list_add_rcu(&key->list, &hdev->long_term_keys);
2573 2574 2575
	}

	bacpy(&key->bdaddr, bdaddr);
2576 2577 2578 2579
	key->bdaddr_type = addr_type;
	memcpy(key->val, tk, sizeof(key->val));
	key->authenticated = authenticated;
	key->ediv = ediv;
2580
	key->rand = rand;
2581 2582
	key->enc_size = enc_size;
	key->type = type;
2583

2584
	return key;
2585 2586
}

2587 2588
struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
			    u8 addr_type, u8 val[16], bdaddr_t *rpa)
2589 2590 2591 2592 2593 2594 2595
{
	struct smp_irk *irk;

	irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
	if (!irk) {
		irk = kzalloc(sizeof(*irk), GFP_KERNEL);
		if (!irk)
2596
			return NULL;
2597 2598 2599 2600

		bacpy(&irk->bdaddr, bdaddr);
		irk->addr_type = addr_type;

2601
		list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2602 2603 2604 2605 2606
	}

	memcpy(irk->val, val, 16);
	bacpy(&irk->rpa, rpa);

2607
	return irk;
2608 2609
}

2610 2611 2612 2613 2614 2615 2616 2617
int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
	struct link_key *key;

	key = hci_find_link_key(hdev, bdaddr);
	if (!key)
		return -ENOENT;

2618
	BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2619

2620 2621
	list_del_rcu(&key->list);
	kfree_rcu(key, rcu);
2622 2623 2624 2625

	return 0;
}

2626
int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2627
{
2628
	struct smp_ltk *k;
2629
	int removed = 0;
2630

2631
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2632
		if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2633 2634
			continue;

2635
		BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2636

2637 2638
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2639
		removed++;
2640 2641
	}

2642
	return removed ? 0 : -ENOENT;
2643 2644
}

2645 2646
void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
{
2647
	struct smp_irk *k;
2648

2649
	list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2650 2651 2652 2653 2654
		if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
			continue;

		BT_DBG("%s removing %pMR", hdev->name, bdaddr);

2655 2656
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2657 2658 2659
	}
}

2660 2661 2662
bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
{
	struct smp_ltk *k;
2663
	struct smp_irk *irk;
2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677
	u8 addr_type;

	if (type == BDADDR_BREDR) {
		if (hci_find_link_key(hdev, bdaddr))
			return true;
		return false;
	}

	/* Convert to HCI addr type which struct smp_ltk uses */
	if (type == BDADDR_LE_PUBLIC)
		addr_type = ADDR_LE_DEV_PUBLIC;
	else
		addr_type = ADDR_LE_DEV_RANDOM;

2678 2679 2680 2681 2682 2683
	irk = hci_get_irk(hdev, bdaddr, addr_type);
	if (irk) {
		bdaddr = &irk->bdaddr;
		addr_type = irk->addr_type;
	}

2684 2685
	rcu_read_lock();
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2686 2687
		if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
			rcu_read_unlock();
2688
			return true;
2689
		}
2690 2691 2692 2693 2694 2695
	}
	rcu_read_unlock();

	return false;
}

2696
/* HCI command timer function */
2697
static void hci_cmd_timeout(struct work_struct *work)
2698
{
2699 2700
	struct hci_dev *hdev = container_of(work, struct hci_dev,
					    cmd_timer.work);
2701

2702 2703 2704 2705
	if (hdev->sent_cmd) {
		struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
		u16 opcode = __le16_to_cpu(sent->opcode);

2706
		bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
2707
	} else {
2708
		bt_dev_err(hdev, "command tx timeout");
2709 2710
	}

2711 2712 2713
	if (hdev->cmd_timeout)
		hdev->cmd_timeout(hdev);

2714
	atomic_set(&hdev->cmd_cnt, 1);
2715
	queue_work(hdev->workqueue, &hdev->cmd_work);
2716 2717
}

2718
struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2719
					  bdaddr_t *bdaddr, u8 bdaddr_type)
2720 2721 2722
{
	struct oob_data *data;

2723 2724 2725 2726 2727 2728 2729
	list_for_each_entry(data, &hdev->remote_oob_data, list) {
		if (bacmp(bdaddr, &data->bdaddr) != 0)
			continue;
		if (data->bdaddr_type != bdaddr_type)
			continue;
		return data;
	}
2730 2731 2732 2733

	return NULL;
}

2734 2735
int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
			       u8 bdaddr_type)
2736 2737 2738
{
	struct oob_data *data;

2739
	data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2740 2741 2742
	if (!data)
		return -ENOENT;

2743
	BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2744 2745 2746 2747 2748 2749 2750

	list_del(&data->list);
	kfree(data);

	return 0;
}

2751
void hci_remote_oob_data_clear(struct hci_dev *hdev)
2752 2753 2754 2755 2756 2757 2758 2759 2760
{
	struct oob_data *data, *n;

	list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
		list_del(&data->list);
		kfree(data);
	}
}

2761
int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2762
			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
2763
			    u8 *hash256, u8 *rand256)
2764 2765 2766
{
	struct oob_data *data;

2767
	data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2768
	if (!data) {
2769
		data = kmalloc(sizeof(*data), GFP_KERNEL);
2770 2771 2772 2773
		if (!data)
			return -ENOMEM;

		bacpy(&data->bdaddr, bdaddr);
2774
		data->bdaddr_type = bdaddr_type;
2775 2776 2777
		list_add(&data->list, &hdev->remote_oob_data);
	}

2778 2779 2780
	if (hash192 && rand192) {
		memcpy(data->hash192, hash192, sizeof(data->hash192));
		memcpy(data->rand192, rand192, sizeof(data->rand192));
2781 2782
		if (hash256 && rand256)
			data->present = 0x03;
2783 2784 2785
	} else {
		memset(data->hash192, 0, sizeof(data->hash192));
		memset(data->rand192, 0, sizeof(data->rand192));
2786 2787 2788 2789
		if (hash256 && rand256)
			data->present = 0x02;
		else
			data->present = 0x00;
2790 2791
	}

2792 2793 2794 2795 2796 2797
	if (hash256 && rand256) {
		memcpy(data->hash256, hash256, sizeof(data->hash256));
		memcpy(data->rand256, rand256, sizeof(data->rand256));
	} else {
		memset(data->hash256, 0, sizeof(data->hash256));
		memset(data->rand256, 0, sizeof(data->rand256));
2798 2799
		if (hash192 && rand192)
			data->present = 0x01;
2800
	}
2801

2802
	BT_DBG("%s for %pMR", hdev->name, bdaddr);
2803 2804 2805 2806

	return 0;
}

2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820
/* This function requires the caller holds hdev->lock */
struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
{
	struct adv_info *adv_instance;

	list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
		if (adv_instance->instance == instance)
			return adv_instance;
	}

	return NULL;
}

/* This function requires the caller holds hdev->lock */
2821 2822
struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
{
2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847
	struct adv_info *cur_instance;

	cur_instance = hci_find_adv_instance(hdev, instance);
	if (!cur_instance)
		return NULL;

	if (cur_instance == list_last_entry(&hdev->adv_instances,
					    struct adv_info, list))
		return list_first_entry(&hdev->adv_instances,
						 struct adv_info, list);
	else
		return list_next_entry(cur_instance, list);
}

/* This function requires the caller holds hdev->lock */
int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
{
	struct adv_info *adv_instance;

	adv_instance = hci_find_adv_instance(hdev, instance);
	if (!adv_instance)
		return -ENOENT;

	BT_DBG("%s removing %dMR", hdev->name, instance);

2848 2849 2850 2851 2852 2853
	if (hdev->cur_adv_instance == instance) {
		if (hdev->adv_instance_timeout) {
			cancel_delayed_work(&hdev->adv_instance_expire);
			hdev->adv_instance_timeout = 0;
		}
		hdev->cur_adv_instance = 0x00;
2854 2855
	}

2856 2857
	cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);

2858 2859 2860 2861 2862 2863 2864 2865
	list_del(&adv_instance->list);
	kfree(adv_instance);

	hdev->adv_instance_cnt--;

	return 0;
}

2866 2867 2868 2869 2870 2871 2872 2873
void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
{
	struct adv_info *adv_instance, *n;

	list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
		adv_instance->rpa_expired = rpa_expired;
}

2874 2875 2876 2877 2878
/* This function requires the caller holds hdev->lock */
void hci_adv_instances_clear(struct hci_dev *hdev)
{
	struct adv_info *adv_instance, *n;

2879 2880 2881 2882 2883
	if (hdev->adv_instance_timeout) {
		cancel_delayed_work(&hdev->adv_instance_expire);
		hdev->adv_instance_timeout = 0;
	}

2884
	list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
2885
		cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
2886 2887 2888 2889 2890
		list_del(&adv_instance->list);
		kfree(adv_instance);
	}

	hdev->adv_instance_cnt = 0;
2891
	hdev->cur_adv_instance = 0x00;
2892 2893
}

2894 2895 2896 2897 2898 2899 2900 2901 2902 2903
static void adv_instance_rpa_expired(struct work_struct *work)
{
	struct adv_info *adv_instance = container_of(work, struct adv_info,
						     rpa_expired_cb.work);

	BT_DBG("");

	adv_instance->rpa_expired = true;
}

2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918
/* This function requires the caller holds hdev->lock */
int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
			 u16 adv_data_len, u8 *adv_data,
			 u16 scan_rsp_len, u8 *scan_rsp_data,
			 u16 timeout, u16 duration)
{
	struct adv_info *adv_instance;

	adv_instance = hci_find_adv_instance(hdev, instance);
	if (adv_instance) {
		memset(adv_instance->adv_data, 0,
		       sizeof(adv_instance->adv_data));
		memset(adv_instance->scan_rsp_data, 0,
		       sizeof(adv_instance->scan_rsp_data));
	} else {
2919
		if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
2920 2921 2922
		    instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
			return -EOVERFLOW;

2923
		adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2924 2925 2926
		if (!adv_instance)
			return -ENOMEM;

2927
		adv_instance->pending = true;
2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944
		adv_instance->instance = instance;
		list_add(&adv_instance->list, &hdev->adv_instances);
		hdev->adv_instance_cnt++;
	}

	adv_instance->flags = flags;
	adv_instance->adv_data_len = adv_data_len;
	adv_instance->scan_rsp_len = scan_rsp_len;

	if (adv_data_len)
		memcpy(adv_instance->adv_data, adv_data, adv_data_len);

	if (scan_rsp_len)
		memcpy(adv_instance->scan_rsp_data,
		       scan_rsp_data, scan_rsp_len);

	adv_instance->timeout = timeout;
2945
	adv_instance->remaining_time = timeout;
2946 2947 2948 2949 2950 2951

	if (duration == 0)
		adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
	else
		adv_instance->duration = duration;

2952 2953
	adv_instance->tx_power = HCI_TX_POWER_INVALID;

2954 2955 2956
	INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
			  adv_instance_rpa_expired);

2957 2958 2959 2960 2961
	BT_DBG("%s for %dMR", hdev->name, instance);

	return 0;
}

2962
struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2963
					 bdaddr_t *bdaddr, u8 type)
2964
{
2965
	struct bdaddr_list *b;
2966

2967
	list_for_each_entry(b, bdaddr_list, list) {
2968
		if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2969
			return b;
2970
	}
2971 2972 2973 2974

	return NULL;
}

2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988
struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
				struct list_head *bdaddr_list, bdaddr_t *bdaddr,
				u8 type)
{
	struct bdaddr_list_with_irk *b;

	list_for_each_entry(b, bdaddr_list, list) {
		if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
			return b;
	}

	return NULL;
}

2989
void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2990
{
2991
	struct bdaddr_list *b, *n;
2992

2993 2994
	list_for_each_entry_safe(b, n, bdaddr_list, list) {
		list_del(&b->list);
2995 2996 2997 2998
		kfree(b);
	}
}

2999
int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3000 3001 3002
{
	struct bdaddr_list *entry;

3003
	if (!bacmp(bdaddr, BDADDR_ANY))
3004 3005
		return -EBADF;

3006
	if (hci_bdaddr_list_lookup(list, bdaddr, type))
3007
		return -EEXIST;
3008

3009
	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
3010 3011
	if (!entry)
		return -ENOMEM;
3012 3013

	bacpy(&entry->bdaddr, bdaddr);
3014
	entry->bdaddr_type = type;
3015

3016
	list_add(&entry->list, list);
3017

3018
	return 0;
3019 3020
}

3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049
int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
					u8 type, u8 *peer_irk, u8 *local_irk)
{
	struct bdaddr_list_with_irk *entry;

	if (!bacmp(bdaddr, BDADDR_ANY))
		return -EBADF;

	if (hci_bdaddr_list_lookup(list, bdaddr, type))
		return -EEXIST;

	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
	if (!entry)
		return -ENOMEM;

	bacpy(&entry->bdaddr, bdaddr);
	entry->bdaddr_type = type;

	if (peer_irk)
		memcpy(entry->peer_irk, peer_irk, 16);

	if (local_irk)
		memcpy(entry->local_irk, local_irk, 16);

	list_add(&entry->list, list);

	return 0;
}

3050
int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
3051 3052 3053
{
	struct bdaddr_list *entry;

3054
	if (!bacmp(bdaddr, BDADDR_ANY)) {
3055
		hci_bdaddr_list_clear(list);
3056 3057
		return 0;
	}
3058

3059
	entry = hci_bdaddr_list_lookup(list, bdaddr, type);
3060 3061 3062 3063 3064 3065 3066 3067 3068
	if (!entry)
		return -ENOENT;

	list_del(&entry->list);
	kfree(entry);

	return 0;
}

3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088
int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
							u8 type)
{
	struct bdaddr_list_with_irk *entry;

	if (!bacmp(bdaddr, BDADDR_ANY)) {
		hci_bdaddr_list_clear(list);
		return 0;
	}

	entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
	if (!entry)
		return -ENOENT;

	list_del(&entry->list);
	kfree(entry);

	return 0;
}

3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104
/* This function requires the caller holds hdev->lock */
struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
					       bdaddr_t *addr, u8 addr_type)
{
	struct hci_conn_params *params;

	list_for_each_entry(params, &hdev->le_conn_params, list) {
		if (bacmp(&params->addr, addr) == 0 &&
		    params->addr_type == addr_type) {
			return params;
		}
	}

	return NULL;
}

3105
/* This function requires the caller holds hdev->lock */
3106 3107
struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
						  bdaddr_t *addr, u8 addr_type)
3108
{
3109
	struct hci_conn_params *param;
3110

3111
	list_for_each_entry(param, list, action) {
3112 3113 3114
		if (bacmp(&param->addr, addr) == 0 &&
		    param->addr_type == addr_type)
			return param;
3115 3116 3117
	}

	return NULL;
3118 3119
}

3120
/* This function requires the caller holds hdev->lock */
3121 3122
struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
					    bdaddr_t *addr, u8 addr_type)
3123 3124 3125 3126
{
	struct hci_conn_params *params;

	params = hci_conn_params_lookup(hdev, addr, addr_type);
3127
	if (params)
3128
		return params;
3129 3130 3131

	params = kzalloc(sizeof(*params), GFP_KERNEL);
	if (!params) {
3132
		bt_dev_err(hdev, "out of memory");
3133
		return NULL;
3134 3135 3136 3137
	}

	bacpy(&params->addr, addr);
	params->addr_type = addr_type;
3138 3139

	list_add(&params->list, &hdev->le_conn_params);
3140
	INIT_LIST_HEAD(&params->action);
3141

3142 3143 3144 3145 3146 3147 3148 3149
	params->conn_min_interval = hdev->le_conn_min_interval;
	params->conn_max_interval = hdev->le_conn_max_interval;
	params->conn_latency = hdev->le_conn_latency;
	params->supervision_timeout = hdev->le_supv_timeout;
	params->auto_connect = HCI_AUTO_CONN_DISABLED;

	BT_DBG("addr %pMR (type %u)", addr, addr_type);

3150
	return params;
3151 3152
}

3153
static void hci_conn_params_free(struct hci_conn_params *params)
3154
{
3155
	if (params->conn) {
3156
		hci_conn_drop(params->conn);
3157 3158
		hci_conn_put(params->conn);
	}
3159

3160
	list_del(&params->action);
3161 3162
	list_del(&params->list);
	kfree(params);
3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174
}

/* This function requires the caller holds hdev->lock */
void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
{
	struct hci_conn_params *params;

	params = hci_conn_params_lookup(hdev, addr, addr_type);
	if (!params)
		return;

	hci_conn_params_free(params);
3175

3176 3177
	hci_update_background_scan(hdev);

3178 3179 3180 3181
	BT_DBG("addr %pMR (type %u)", addr, addr_type);
}

/* This function requires the caller holds hdev->lock */
3182
void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3183 3184 3185 3186
{
	struct hci_conn_params *params, *tmp;

	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3187 3188
		if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
			continue;
3189 3190 3191 3192 3193 3194 3195 3196 3197

		/* If trying to estabilish one time connection to disabled
		 * device, leave the params, but mark them as just once.
		 */
		if (params->explicit_connect) {
			params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
			continue;
		}

3198 3199 3200 3201
		list_del(&params->list);
		kfree(params);
	}

3202
	BT_DBG("All LE disabled connection parameters were removed");
3203 3204 3205
}

/* This function requires the caller holds hdev->lock */
3206
static void hci_conn_params_clear_all(struct hci_dev *hdev)
3207
{
3208
	struct hci_conn_params *params, *tmp;
3209

3210 3211
	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
		hci_conn_params_free(params);
3212

3213
	BT_DBG("All LE connection parameters were removed");
3214 3215
}

3216 3217 3218 3219 3220 3221 3222 3223
/* Copy the Identity Address of the controller.
 *
 * If the controller has a public BD_ADDR, then by default use that one.
 * If this is a LE only controller without a public address, default to
 * the static random address.
 *
 * For debugging purposes it is possible to force controllers with a
 * public address to use the static random address instead.
3224 3225 3226 3227
 *
 * In case BR/EDR has been disabled on a dual-mode controller and
 * userspace has configured a static address, then that address
 * becomes the identity address instead of the public BR/EDR address.
3228 3229 3230 3231
 */
void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
			       u8 *bdaddr_type)
{
3232
	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3233
	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3234
	    (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3235
	     bacmp(&hdev->static_addr, BDADDR_ANY))) {
3236 3237 3238 3239 3240 3241 3242 3243
		bacpy(bdaddr, &hdev->static_addr);
		*bdaddr_type = ADDR_LE_DEV_RANDOM;
	} else {
		bacpy(bdaddr, &hdev->bdaddr);
		*bdaddr_type = ADDR_LE_DEV_PUBLIC;
	}
}

3244 3245 3246 3247 3248
/* Alloc HCI device */
struct hci_dev *hci_alloc_dev(void)
{
	struct hci_dev *hdev;

3249
	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3250 3251 3252
	if (!hdev)
		return NULL;

3253 3254 3255
	hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
	hdev->esco_type = (ESCO_HV1);
	hdev->link_mode = (HCI_LM_ACCEPT);
3256 3257
	hdev->num_iac = 0x01;		/* One IAC support is mandatory */
	hdev->io_capability = 0x03;	/* No Input No Output */
3258
	hdev->manufacturer = 0xffff;	/* Default to internal use */
3259 3260
	hdev->inq_tx_power = HCI_TX_POWER_INVALID;
	hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3261 3262
	hdev->adv_instance_cnt = 0;
	hdev->cur_adv_instance = 0x00;
3263
	hdev->adv_instance_timeout = 0;
3264 3265 3266 3267

	hdev->sniff_max_interval = 800;
	hdev->sniff_min_interval = 80;

3268
	hdev->le_adv_channel_map = 0x07;
3269 3270
	hdev->le_adv_min_interval = 0x0800;
	hdev->le_adv_max_interval = 0x0800;
3271 3272
	hdev->le_scan_interval = 0x0060;
	hdev->le_scan_window = 0x0030;
3273 3274
	hdev->le_conn_min_interval = 0x0018;
	hdev->le_conn_max_interval = 0x0028;
3275 3276
	hdev->le_conn_latency = 0x0000;
	hdev->le_supv_timeout = 0x002a;
3277 3278 3279 3280 3281 3282
	hdev->le_def_tx_len = 0x001b;
	hdev->le_def_tx_time = 0x0148;
	hdev->le_max_tx_len = 0x001b;
	hdev->le_max_tx_time = 0x0148;
	hdev->le_max_rx_len = 0x001b;
	hdev->le_max_rx_time = 0x0148;
3283 3284
	hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
	hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
3285 3286
	hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
	hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
3287
	hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
3288

3289
	hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3290
	hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3291 3292
	hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
	hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3293
	hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
3294
	hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
3295

3296 3297 3298 3299 3300
	mutex_init(&hdev->lock);
	mutex_init(&hdev->req_lock);

	INIT_LIST_HEAD(&hdev->mgmt_pending);
	INIT_LIST_HEAD(&hdev->blacklist);
3301
	INIT_LIST_HEAD(&hdev->whitelist);
3302 3303 3304
	INIT_LIST_HEAD(&hdev->uuids);
	INIT_LIST_HEAD(&hdev->link_keys);
	INIT_LIST_HEAD(&hdev->long_term_keys);
3305
	INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3306
	INIT_LIST_HEAD(&hdev->remote_oob_data);
3307
	INIT_LIST_HEAD(&hdev->le_white_list);
3308
	INIT_LIST_HEAD(&hdev->le_resolv_list);
3309
	INIT_LIST_HEAD(&hdev->le_conn_params);
3310
	INIT_LIST_HEAD(&hdev->pend_le_conns);
3311
	INIT_LIST_HEAD(&hdev->pend_le_reports);
3312
	INIT_LIST_HEAD(&hdev->conn_hash.list);
3313
	INIT_LIST_HEAD(&hdev->adv_instances);
3314
	INIT_LIST_HEAD(&hdev->blocked_keys);
3315 3316 3317 3318 3319

	INIT_WORK(&hdev->rx_work, hci_rx_work);
	INIT_WORK(&hdev->cmd_work, hci_cmd_work);
	INIT_WORK(&hdev->tx_work, hci_tx_work);
	INIT_WORK(&hdev->power_on, hci_power_on);
3320
	INIT_WORK(&hdev->error_reset, hci_error_reset);
3321 3322 3323 3324 3325 3326 3327 3328 3329

	INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);

	skb_queue_head_init(&hdev->rx_q);
	skb_queue_head_init(&hdev->cmd_q);
	skb_queue_head_init(&hdev->raw_q);

	init_waitqueue_head(&hdev->req_wait_q);

3330
	INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3331

3332 3333
	hci_request_setup(hdev);

3334 3335
	hci_init_sysfs(hdev);
	discovery_init(hdev);
3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348

	return hdev;
}
EXPORT_SYMBOL(hci_alloc_dev);

/* Free HCI device */
void hci_free_dev(struct hci_dev *hdev)
{
	/* will free via device release */
	put_device(&hdev->dev);
}
EXPORT_SYMBOL(hci_free_dev);

L
Linus Torvalds 已提交
3349 3350 3351
/* Register HCI device */
int hci_register_dev(struct hci_dev *hdev)
{
3352
	int id, error;
L
Linus Torvalds 已提交
3353

3354
	if (!hdev->open || !hdev->close || !hdev->send)
L
Linus Torvalds 已提交
3355 3356
		return -EINVAL;

3357 3358 3359
	/* Do not allow HCI_AMP devices to register at index 0,
	 * so the index can be used as the AMP controller ID.
	 */
3360
	switch (hdev->dev_type) {
3361
	case HCI_PRIMARY:
3362 3363 3364 3365 3366 3367 3368
		id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
		break;
	case HCI_AMP:
		id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
		break;
	default:
		return -EINVAL;
L
Linus Torvalds 已提交
3369
	}
3370

3371 3372 3373
	if (id < 0)
		return id;

L
Linus Torvalds 已提交
3374 3375
	sprintf(hdev->name, "hci%d", id);
	hdev->id = id;
3376 3377 3378

	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);

3379
	hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
3380 3381 3382 3383
	if (!hdev->workqueue) {
		error = -ENOMEM;
		goto err;
	}
3384

3385 3386
	hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
						      hdev->name);
3387 3388 3389 3390 3391 3392
	if (!hdev->req_workqueue) {
		destroy_workqueue(hdev->workqueue);
		error = -ENOMEM;
		goto err;
	}

3393 3394 3395
	if (!IS_ERR_OR_NULL(bt_debugfs))
		hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);

3396 3397 3398
	dev_set_name(&hdev->dev, "%s", hdev->name);

	error = device_add(&hdev->dev);
3399
	if (error < 0)
3400
		goto err_wqueue;
L
Linus Torvalds 已提交
3401

3402 3403
	hci_leds_init(hdev);

3404
	hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3405 3406
				    RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
				    hdev);
3407 3408 3409 3410 3411 3412 3413
	if (hdev->rfkill) {
		if (rfkill_register(hdev->rfkill) < 0) {
			rfkill_destroy(hdev->rfkill);
			hdev->rfkill = NULL;
		}
	}

3414
	if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3415
		hci_dev_set_flag(hdev, HCI_RFKILLED);
3416

3417 3418
	hci_dev_set_flag(hdev, HCI_SETUP);
	hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3419

3420
	if (hdev->dev_type == HCI_PRIMARY) {
3421 3422 3423
		/* Assume BR/EDR support until proven otherwise (such as
		 * through reading supported features during init.
		 */
3424
		hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3425
	}
3426

3427 3428 3429 3430
	write_lock(&hci_dev_list_lock);
	list_add(&hdev->list, &hci_dev_list);
	write_unlock(&hci_dev_list_lock);

3431 3432
	/* Devices that are marked for raw-only usage are unconfigured
	 * and should not be included in normal operation.
3433 3434
	 */
	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3435
		hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3436

3437
	hci_sock_dev_event(hdev, HCI_DEV_REG);
3438
	hci_dev_hold(hdev);
L
Linus Torvalds 已提交
3439

3440
	queue_work(hdev->req_workqueue, &hdev->power_on);
3441

L
Linus Torvalds 已提交
3442
	return id;
3443

3444 3445
err_wqueue:
	destroy_workqueue(hdev->workqueue);
3446
	destroy_workqueue(hdev->req_workqueue);
3447
err:
3448
	ida_simple_remove(&hci_index_ida, hdev->id);
3449

3450
	return error;
L
Linus Torvalds 已提交
3451 3452 3453 3454
}
EXPORT_SYMBOL(hci_register_dev);

/* Unregister HCI device */
3455
void hci_unregister_dev(struct hci_dev *hdev)
L
Linus Torvalds 已提交
3456
{
3457
	int id;
3458

3459
	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
L
Linus Torvalds 已提交
3460

3461
	hci_dev_set_flag(hdev, HCI_UNREGISTER);
3462

3463 3464
	id = hdev->id;

3465
	write_lock(&hci_dev_list_lock);
L
Linus Torvalds 已提交
3466
	list_del(&hdev->list);
3467
	write_unlock(&hci_dev_list_lock);
L
Linus Torvalds 已提交
3468

3469 3470
	cancel_work_sync(&hdev->power_on);

3471 3472
	hci_dev_do_close(hdev);

3473
	if (!test_bit(HCI_INIT, &hdev->flags) &&
3474 3475
	    !hci_dev_test_flag(hdev, HCI_SETUP) &&
	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3476
		hci_dev_lock(hdev);
3477
		mgmt_index_removed(hdev);
3478
		hci_dev_unlock(hdev);
3479
	}
3480

3481 3482 3483 3484
	/* mgmt_index_removed should take care of emptying the
	 * pending list */
	BUG_ON(!list_empty(&hdev->mgmt_pending));

3485
	hci_sock_dev_event(hdev, HCI_DEV_UNREG);
L
Linus Torvalds 已提交
3486

3487 3488 3489 3490 3491
	if (hdev->rfkill) {
		rfkill_unregister(hdev->rfkill);
		rfkill_destroy(hdev->rfkill);
	}

3492
	device_del(&hdev->dev);
3493

3494
	debugfs_remove_recursive(hdev->debugfs);
3495 3496
	kfree_const(hdev->hw_info);
	kfree_const(hdev->fw_info);
3497

3498
	destroy_workqueue(hdev->workqueue);
3499
	destroy_workqueue(hdev->req_workqueue);
3500

3501
	hci_dev_lock(hdev);
3502
	hci_bdaddr_list_clear(&hdev->blacklist);
3503
	hci_bdaddr_list_clear(&hdev->whitelist);
3504
	hci_uuids_clear(hdev);
3505
	hci_link_keys_clear(hdev);
3506
	hci_smp_ltks_clear(hdev);
3507
	hci_smp_irks_clear(hdev);
3508
	hci_remote_oob_data_clear(hdev);
3509
	hci_adv_instances_clear(hdev);
3510
	hci_bdaddr_list_clear(&hdev->le_white_list);
3511
	hci_bdaddr_list_clear(&hdev->le_resolv_list);
3512
	hci_conn_params_clear_all(hdev);
3513
	hci_discovery_filter_clear(hdev);
3514
	hci_blocked_keys_clear(hdev);
3515
	hci_dev_unlock(hdev);
3516

3517
	hci_dev_put(hdev);
3518 3519

	ida_simple_remove(&hci_index_ida, id);
L
Linus Torvalds 已提交
3520 3521 3522 3523 3524 3525
}
EXPORT_SYMBOL(hci_unregister_dev);

/* Suspend HCI device */
int hci_suspend_dev(struct hci_dev *hdev)
{
3526
	hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
L
Linus Torvalds 已提交
3527 3528 3529 3530 3531 3532 3533
	return 0;
}
EXPORT_SYMBOL(hci_suspend_dev);

/* Resume HCI device */
int hci_resume_dev(struct hci_dev *hdev)
{
3534
	hci_sock_dev_event(hdev, HCI_DEV_RESUME);
L
Linus Torvalds 已提交
3535 3536 3537 3538
	return 0;
}
EXPORT_SYMBOL(hci_resume_dev);

3539 3540 3541
/* Reset HCI device */
int hci_reset_dev(struct hci_dev *hdev)
{
3542
	static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
3543 3544 3545 3546 3547 3548
	struct sk_buff *skb;

	skb = bt_skb_alloc(3, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;

3549
	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
3550
	skb_put_data(skb, hw_err, 3);
3551 3552 3553 3554 3555 3556

	/* Send Hardware Error to upper stack */
	return hci_recv_frame(hdev, skb);
}
EXPORT_SYMBOL(hci_reset_dev);

3557
/* Receive frame from HCI drivers */
3558
int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3559 3560
{
	if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3561
		      && !test_bit(HCI_INIT, &hdev->flags))) {
3562 3563 3564 3565
		kfree_skb(skb);
		return -ENXIO;
	}

3566 3567
	if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
	    hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
3568 3569
	    hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
	    hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
3570 3571 3572 3573
		kfree_skb(skb);
		return -EINVAL;
	}

3574
	/* Incoming skb */
3575 3576 3577 3578 3579 3580
	bt_cb(skb)->incoming = 1;

	/* Time stamp */
	__net_timestamp(skb);

	skb_queue_tail(&hdev->rx_q, skb);
3581
	queue_work(hdev->workqueue, &hdev->rx_work);
3582

3583 3584 3585 3586
	return 0;
}
EXPORT_SYMBOL(hci_recv_frame);

3587 3588 3589
/* Receive diagnostic message from HCI drivers */
int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
{
3590
	/* Mark as diagnostic packet */
3591
	hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
3592

3593 3594 3595
	/* Time stamp */
	__net_timestamp(skb);

3596 3597
	skb_queue_tail(&hdev->rx_q, skb);
	queue_work(hdev->workqueue, &hdev->rx_work);
3598 3599 3600 3601 3602

	return 0;
}
EXPORT_SYMBOL(hci_recv_diag);

3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624
void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
{
	va_list vargs;

	va_start(vargs, fmt);
	kfree_const(hdev->hw_info);
	hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
	va_end(vargs);
}
EXPORT_SYMBOL(hci_set_hw_info);

void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
{
	va_list vargs;

	va_start(vargs, fmt);
	kfree_const(hdev->fw_info);
	hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
	va_end(vargs);
}
EXPORT_SYMBOL(hci_set_fw_info);

L
Linus Torvalds 已提交
3625 3626 3627 3628 3629 3630
/* ---- Interface to upper protocols ---- */

int hci_register_cb(struct hci_cb *cb)
{
	BT_DBG("%p name %s", cb, cb->name);

3631
	mutex_lock(&hci_cb_list_lock);
3632
	list_add_tail(&cb->list, &hci_cb_list);
3633
	mutex_unlock(&hci_cb_list_lock);
L
Linus Torvalds 已提交
3634 3635 3636 3637 3638 3639 3640 3641 3642

	return 0;
}
EXPORT_SYMBOL(hci_register_cb);

int hci_unregister_cb(struct hci_cb *cb)
{
	BT_DBG("%p name %s", cb, cb->name);

3643
	mutex_lock(&hci_cb_list_lock);
L
Linus Torvalds 已提交
3644
	list_del(&cb->list);
3645
	mutex_unlock(&hci_cb_list_lock);
L
Linus Torvalds 已提交
3646 3647 3648 3649 3650

	return 0;
}
EXPORT_SYMBOL(hci_unregister_cb);

3651
static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
L
Linus Torvalds 已提交
3652
{
3653 3654
	int err;

3655 3656
	BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
	       skb->len);
L
Linus Torvalds 已提交
3657

3658 3659
	/* Time stamp */
	__net_timestamp(skb);
L
Linus Torvalds 已提交
3660

3661 3662 3663 3664 3665
	/* Send copy to monitor */
	hci_send_to_monitor(hdev, skb);

	if (atomic_read(&hdev->promisc)) {
		/* Send copy to the sockets */
3666
		hci_send_to_sock(hdev, skb);
L
Linus Torvalds 已提交
3667 3668 3669 3670 3671
	}

	/* Get rid of skb owner, prior to sending to the driver. */
	skb_orphan(skb);

3672 3673 3674 3675 3676
	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
		kfree_skb(skb);
		return;
	}

3677 3678
	err = hdev->send(hdev, skb);
	if (err < 0) {
3679
		bt_dev_err(hdev, "sending frame failed (%d)", err);
3680 3681
		kfree_skb(skb);
	}
L
Linus Torvalds 已提交
3682 3683
}

3684
/* Send HCI command */
3685 3686
int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
		 const void *param)
3687 3688 3689 3690 3691 3692 3693
{
	struct sk_buff *skb;

	BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);

	skb = hci_prepare_cmd(hdev, opcode, plen, param);
	if (!skb) {
3694
		bt_dev_err(hdev, "no memory for command");
3695 3696 3697
		return -ENOMEM;
	}

3698
	/* Stand-alone HCI commands must be flagged as
3699 3700
	 * single-command requests.
	 */
3701
	bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3702

L
Linus Torvalds 已提交
3703
	skb_queue_tail(&hdev->cmd_q, skb);
3704
	queue_work(hdev->workqueue, &hdev->cmd_work);
L
Linus Torvalds 已提交
3705 3706 3707 3708

	return 0;
}

3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739
int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
		   const void *param)
{
	struct sk_buff *skb;

	if (hci_opcode_ogf(opcode) != 0x3f) {
		/* A controller receiving a command shall respond with either
		 * a Command Status Event or a Command Complete Event.
		 * Therefore, all standard HCI commands must be sent via the
		 * standard API, using hci_send_cmd or hci_cmd_sync helpers.
		 * Some vendors do not comply with this rule for vendor-specific
		 * commands and do not return any event. We want to support
		 * unresponded commands for such cases only.
		 */
		bt_dev_err(hdev, "unresponded command not supported");
		return -EINVAL;
	}

	skb = hci_prepare_cmd(hdev, opcode, plen, param);
	if (!skb) {
		bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
			   opcode);
		return -ENOMEM;
	}

	hci_send_frame(hdev, skb);

	return 0;
}
EXPORT_SYMBOL(__hci_cmd_send);

L
Linus Torvalds 已提交
3740
/* Get data from the previously sent command */
3741
void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
L
Linus Torvalds 已提交
3742 3743 3744 3745 3746 3747 3748 3749
{
	struct hci_command_hdr *hdr;

	if (!hdev->sent_cmd)
		return NULL;

	hdr = (void *) hdev->sent_cmd->data;

3750
	if (hdr->opcode != cpu_to_le16(opcode))
L
Linus Torvalds 已提交
3751 3752
		return NULL;

3753
	BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
L
Linus Torvalds 已提交
3754 3755 3756 3757

	return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
}

3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768
/* Send HCI command and wait for command commplete event */
struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
			     const void *param, u32 timeout)
{
	struct sk_buff *skb;

	if (!test_bit(HCI_UP, &hdev->flags))
		return ERR_PTR(-ENETDOWN);

	bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);

3769
	hci_req_sync_lock(hdev);
3770
	skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
3771
	hci_req_sync_unlock(hdev);
3772 3773 3774 3775 3776

	return skb;
}
EXPORT_SYMBOL(hci_cmd_sync);

L
Linus Torvalds 已提交
3777 3778 3779 3780 3781 3782
/* Send ACL data */
static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
{
	struct hci_acl_hdr *hdr;
	int len = skb->len;

3783 3784
	skb_push(skb, HCI_ACL_HDR_SIZE);
	skb_reset_transport_header(skb);
3785
	hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3786 3787
	hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
	hdr->dlen   = cpu_to_le16(len);
L
Linus Torvalds 已提交
3788 3789
}

3790
static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3791
			  struct sk_buff *skb, __u16 flags)
L
Linus Torvalds 已提交
3792
{
3793
	struct hci_conn *conn = chan->conn;
L
Linus Torvalds 已提交
3794 3795 3796
	struct hci_dev *hdev = conn->hdev;
	struct sk_buff *list;

3797 3798 3799
	skb->len = skb_headlen(skb);
	skb->data_len = 0;

3800
	hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3801 3802

	switch (hdev->dev_type) {
3803
	case HCI_PRIMARY:
3804 3805 3806 3807 3808 3809
		hci_add_acl_hdr(skb, conn->handle, flags);
		break;
	case HCI_AMP:
		hci_add_acl_hdr(skb, chan->handle, flags);
		break;
	default:
3810
		bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3811 3812
		return;
	}
3813

3814 3815
	list = skb_shinfo(skb)->frag_list;
	if (!list) {
L
Linus Torvalds 已提交
3816 3817 3818
		/* Non fragmented */
		BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);

3819
		skb_queue_tail(queue, skb);
L
Linus Torvalds 已提交
3820 3821 3822 3823 3824 3825
	} else {
		/* Fragmented */
		BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);

		skb_shinfo(skb)->frag_list = NULL;

3826 3827 3828 3829 3830 3831
		/* Queue all fragments atomically. We need to use spin_lock_bh
		 * here because of 6LoWPAN links, as there this function is
		 * called from softirq and using normal spin lock could cause
		 * deadlocks.
		 */
		spin_lock_bh(&queue->lock);
L
Linus Torvalds 已提交
3832

3833
		__skb_queue_tail(queue, skb);
3834 3835 3836

		flags &= ~ACL_START;
		flags |= ACL_CONT;
L
Linus Torvalds 已提交
3837 3838
		do {
			skb = list; list = list->next;
3839

3840
			hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3841
			hci_add_acl_hdr(skb, conn->handle, flags);
L
Linus Torvalds 已提交
3842 3843 3844

			BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);

3845
			__skb_queue_tail(queue, skb);
L
Linus Torvalds 已提交
3846 3847
		} while (list);

3848
		spin_unlock_bh(&queue->lock);
L
Linus Torvalds 已提交
3849
	}
3850 3851 3852 3853
}

void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
{
3854
	struct hci_dev *hdev = chan->conn->hdev;
3855

3856
	BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3857

3858
	hci_queue_acl(chan, &chan->data_q, skb, flags);
L
Linus Torvalds 已提交
3859

3860
	queue_work(hdev->workqueue, &hdev->tx_work);
L
Linus Torvalds 已提交
3861 3862 3863
}

/* Send SCO data */
3864
void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
L
Linus Torvalds 已提交
3865 3866 3867 3868 3869 3870
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_sco_hdr hdr;

	BT_DBG("%s len %d", hdev->name, skb->len);

3871
	hdr.handle = cpu_to_le16(conn->handle);
L
Linus Torvalds 已提交
3872 3873
	hdr.dlen   = skb->len;

3874 3875
	skb_push(skb, HCI_SCO_HDR_SIZE);
	skb_reset_transport_header(skb);
3876
	memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
L
Linus Torvalds 已提交
3877

3878
	hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3879

L
Linus Torvalds 已提交
3880
	skb_queue_tail(&conn->data_q, skb);
3881
	queue_work(hdev->workqueue, &hdev->tx_work);
L
Linus Torvalds 已提交
3882 3883 3884 3885 3886
}

/* ---- HCI TX task (outgoing data) ---- */

/* HCI Connection scheduler */
3887 3888
static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
				     int *quote)
L
Linus Torvalds 已提交
3889 3890
{
	struct hci_conn_hash *h = &hdev->conn_hash;
3891
	struct hci_conn *conn = NULL, *c;
3892
	unsigned int num = 0, min = ~0;
L
Linus Torvalds 已提交
3893

3894
	/* We don't have to lock device here. Connections are always
L
Linus Torvalds 已提交
3895
	 * added and removed with TX task disabled. */
3896 3897 3898 3899

	rcu_read_lock();

	list_for_each_entry_rcu(c, &h->list, list) {
3900
		if (c->type != type || skb_queue_empty(&c->data_q))
L
Linus Torvalds 已提交
3901
			continue;
3902 3903 3904 3905

		if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
			continue;

L
Linus Torvalds 已提交
3906 3907 3908 3909 3910 3911
		num++;

		if (c->sent < min) {
			min  = c->sent;
			conn = c;
		}
3912 3913 3914

		if (hci_conn_num(hdev, type) == num)
			break;
L
Linus Torvalds 已提交
3915 3916
	}

3917 3918
	rcu_read_unlock();

L
Linus Torvalds 已提交
3919
	if (conn) {
3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934
		int cnt, q;

		switch (conn->type) {
		case ACL_LINK:
			cnt = hdev->acl_cnt;
			break;
		case SCO_LINK:
		case ESCO_LINK:
			cnt = hdev->sco_cnt;
			break;
		case LE_LINK:
			cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
			break;
		default:
			cnt = 0;
3935
			bt_dev_err(hdev, "unknown link type %d", conn->type);
3936 3937 3938
		}

		q = cnt / num;
L
Linus Torvalds 已提交
3939 3940 3941 3942 3943 3944 3945 3946
		*quote = q ? q : 1;
	} else
		*quote = 0;

	BT_DBG("conn %p quote %d", conn, *quote);
	return conn;
}

3947
static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
L
Linus Torvalds 已提交
3948 3949
{
	struct hci_conn_hash *h = &hdev->conn_hash;
3950
	struct hci_conn *c;
L
Linus Torvalds 已提交
3951

3952
	bt_dev_err(hdev, "link tx timeout");
L
Linus Torvalds 已提交
3953

3954 3955
	rcu_read_lock();

L
Linus Torvalds 已提交
3956
	/* Kill stalled connections */
3957
	list_for_each_entry_rcu(c, &h->list, list) {
3958
		if (c->type == type && c->sent) {
3959 3960
			bt_dev_err(hdev, "killing stalled connection %pMR",
				   &c->dst);
3961
			hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
L
Linus Torvalds 已提交
3962 3963
		}
	}
3964 3965

	rcu_read_unlock();
L
Linus Torvalds 已提交
3966 3967
}

3968 3969
static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
				      int *quote)
L
Linus Torvalds 已提交
3970
{
3971 3972
	struct hci_conn_hash *h = &hdev->conn_hash;
	struct hci_chan *chan = NULL;
3973
	unsigned int num = 0, min = ~0, cur_prio = 0;
L
Linus Torvalds 已提交
3974
	struct hci_conn *conn;
3975 3976 3977 3978
	int cnt, q, conn_num = 0;

	BT_DBG("%s", hdev->name);

3979 3980 3981
	rcu_read_lock();

	list_for_each_entry_rcu(conn, &h->list, list) {
3982 3983 3984 3985 3986 3987 3988 3989 3990 3991
		struct hci_chan *tmp;

		if (conn->type != type)
			continue;

		if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
			continue;

		conn_num++;

3992
		list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019
			struct sk_buff *skb;

			if (skb_queue_empty(&tmp->data_q))
				continue;

			skb = skb_peek(&tmp->data_q);
			if (skb->priority < cur_prio)
				continue;

			if (skb->priority > cur_prio) {
				num = 0;
				min = ~0;
				cur_prio = skb->priority;
			}

			num++;

			if (conn->sent < min) {
				min  = conn->sent;
				chan = tmp;
			}
		}

		if (hci_conn_num(hdev, type) == conn_num)
			break;
	}

4020 4021
	rcu_read_unlock();

4022 4023 4024 4025 4026 4027 4028
	if (!chan)
		return NULL;

	switch (chan->conn->type) {
	case ACL_LINK:
		cnt = hdev->acl_cnt;
		break;
4029 4030 4031
	case AMP_LINK:
		cnt = hdev->block_cnt;
		break;
4032 4033 4034 4035 4036 4037 4038 4039 4040
	case SCO_LINK:
	case ESCO_LINK:
		cnt = hdev->sco_cnt;
		break;
	case LE_LINK:
		cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
		break;
	default:
		cnt = 0;
4041
		bt_dev_err(hdev, "unknown link type %d", chan->conn->type);
4042 4043 4044 4045 4046 4047 4048 4049
	}

	q = cnt / num;
	*quote = q ? q : 1;
	BT_DBG("chan %p quote %d", chan, *quote);
	return chan;
}

4050 4051 4052 4053 4054 4055 4056 4057
static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
{
	struct hci_conn_hash *h = &hdev->conn_hash;
	struct hci_conn *conn;
	int num = 0;

	BT_DBG("%s", hdev->name);

4058 4059 4060
	rcu_read_lock();

	list_for_each_entry_rcu(conn, &h->list, list) {
4061 4062 4063 4064 4065 4066 4067 4068 4069 4070
		struct hci_chan *chan;

		if (conn->type != type)
			continue;

		if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
			continue;

		num++;

4071
		list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088
			struct sk_buff *skb;

			if (chan->sent) {
				chan->sent = 0;
				continue;
			}

			if (skb_queue_empty(&chan->data_q))
				continue;

			skb = skb_peek(&chan->data_q);
			if (skb->priority >= HCI_PRIO_MAX - 1)
				continue;

			skb->priority = HCI_PRIO_MAX - 1;

			BT_DBG("chan %p skb %p promoted to %d", chan, skb,
4089
			       skb->priority);
4090 4091 4092 4093 4094
		}

		if (hci_conn_num(hdev, type) == num)
			break;
	}
4095 4096 4097

	rcu_read_unlock();

4098 4099
}

4100 4101 4102 4103 4104 4105
static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
{
	/* Calculate count of blocks used by this packet */
	return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
}

4106
static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4107
{
4108
	if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
L
Linus Torvalds 已提交
4109 4110
		/* ACL tx timeout must be longer than maximum
		 * link supervision timeout (40.9 seconds) */
4111
		if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4112
				       HCI_ACL_TX_TIMEOUT))
4113
			hci_link_tx_to(hdev, ACL_LINK);
L
Linus Torvalds 已提交
4114
	}
4115
}
L
Linus Torvalds 已提交
4116

4117
static void hci_sched_acl_pkt(struct hci_dev *hdev)
4118 4119 4120 4121 4122 4123 4124
{
	unsigned int cnt = hdev->acl_cnt;
	struct hci_chan *chan;
	struct sk_buff *skb;
	int quote;

	__check_timeout(hdev, cnt);
4125

4126
	while (hdev->acl_cnt &&
4127
	       (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
4128 4129
		u32 priority = (skb_peek(&chan->data_q))->priority;
		while (quote-- && (skb = skb_peek(&chan->data_q))) {
4130
			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4131
			       skb->len, skb->priority);
4132

4133 4134 4135 4136 4137 4138
			/* Stop if priority has changed */
			if (skb->priority < priority)
				break;

			skb = skb_dequeue(&chan->data_q);

4139
			hci_conn_enter_active_mode(chan->conn,
4140
						   bt_cb(skb)->force_active);
4141

4142
			hci_send_frame(hdev, skb);
L
Linus Torvalds 已提交
4143 4144 4145
			hdev->acl_last_tx = jiffies;

			hdev->acl_cnt--;
4146 4147
			chan->sent++;
			chan->conn->sent++;
L
Linus Torvalds 已提交
4148 4149
		}
	}
4150 4151 4152

	if (cnt != hdev->acl_cnt)
		hci_prio_recalculate(hdev, ACL_LINK);
L
Linus Torvalds 已提交
4153 4154
}

4155
static void hci_sched_acl_blk(struct hci_dev *hdev)
4156
{
4157
	unsigned int cnt = hdev->block_cnt;
4158 4159 4160
	struct hci_chan *chan;
	struct sk_buff *skb;
	int quote;
4161
	u8 type;
4162

4163
	__check_timeout(hdev, cnt);
4164

4165 4166 4167 4168 4169 4170 4171
	BT_DBG("%s", hdev->name);

	if (hdev->dev_type == HCI_AMP)
		type = AMP_LINK;
	else
		type = ACL_LINK;

4172
	while (hdev->block_cnt > 0 &&
4173
	       (chan = hci_chan_sent(hdev, type, &quote))) {
4174 4175 4176 4177 4178
		u32 priority = (skb_peek(&chan->data_q))->priority;
		while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
			int blocks;

			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4179
			       skb->len, skb->priority);
4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191

			/* Stop if priority has changed */
			if (skb->priority < priority)
				break;

			skb = skb_dequeue(&chan->data_q);

			blocks = __get_blocks(hdev, skb);
			if (blocks > hdev->block_cnt)
				return;

			hci_conn_enter_active_mode(chan->conn,
4192
						   bt_cb(skb)->force_active);
4193

4194
			hci_send_frame(hdev, skb);
4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205
			hdev->acl_last_tx = jiffies;

			hdev->block_cnt -= blocks;
			quote -= blocks;

			chan->sent += blocks;
			chan->conn->sent += blocks;
		}
	}

	if (cnt != hdev->block_cnt)
4206
		hci_prio_recalculate(hdev, type);
4207 4208
}

4209
static void hci_sched_acl(struct hci_dev *hdev)
4210 4211 4212
{
	BT_DBG("%s", hdev->name);

4213
	/* No ACL link over BR/EDR controller */
4214
	if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
4215 4216 4217 4218
		return;

	/* No AMP link over AMP controller */
	if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231
		return;

	switch (hdev->flow_ctl_mode) {
	case HCI_FLOW_CTL_MODE_PACKET_BASED:
		hci_sched_acl_pkt(hdev);
		break;

	case HCI_FLOW_CTL_MODE_BLOCK_BASED:
		hci_sched_acl_blk(hdev);
		break;
	}
}

L
Linus Torvalds 已提交
4232
/* Schedule SCO */
4233
static void hci_sched_sco(struct hci_dev *hdev)
L
Linus Torvalds 已提交
4234 4235 4236 4237 4238 4239 4240
{
	struct hci_conn *conn;
	struct sk_buff *skb;
	int quote;

	BT_DBG("%s", hdev->name);

4241 4242 4243
	if (!hci_conn_num(hdev, SCO_LINK))
		return;

L
Linus Torvalds 已提交
4244 4245 4246
	while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
		while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
			BT_DBG("skb %p len %d", skb, skb->len);
4247
			hci_send_frame(hdev, skb);
L
Linus Torvalds 已提交
4248 4249 4250 4251 4252 4253 4254 4255

			conn->sent++;
			if (conn->sent == ~0)
				conn->sent = 0;
		}
	}
}

4256
static void hci_sched_esco(struct hci_dev *hdev)
4257 4258 4259 4260 4261 4262 4263
{
	struct hci_conn *conn;
	struct sk_buff *skb;
	int quote;

	BT_DBG("%s", hdev->name);

4264 4265 4266
	if (!hci_conn_num(hdev, ESCO_LINK))
		return;

4267 4268
	while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
						     &quote))) {
4269 4270
		while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
			BT_DBG("skb %p len %d", skb, skb->len);
4271
			hci_send_frame(hdev, skb);
4272 4273 4274 4275 4276 4277 4278 4279

			conn->sent++;
			if (conn->sent == ~0)
				conn->sent = 0;
		}
	}
}

4280
static void hci_sched_le(struct hci_dev *hdev)
4281
{
4282
	struct hci_chan *chan;
4283
	struct sk_buff *skb;
4284
	int quote, cnt, tmp;
4285 4286 4287

	BT_DBG("%s", hdev->name);

4288 4289 4290
	if (!hci_conn_num(hdev, LE_LINK))
		return;

4291
	cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4292 4293 4294

	__check_timeout(hdev, cnt);

4295
	tmp = cnt;
4296
	while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
4297 4298
		u32 priority = (skb_peek(&chan->data_q))->priority;
		while (quote-- && (skb = skb_peek(&chan->data_q))) {
4299
			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4300
			       skb->len, skb->priority);
4301

4302 4303 4304 4305 4306 4307
			/* Stop if priority has changed */
			if (skb->priority < priority)
				break;

			skb = skb_dequeue(&chan->data_q);

4308
			hci_send_frame(hdev, skb);
4309 4310 4311
			hdev->le_last_tx = jiffies;

			cnt--;
4312 4313
			chan->sent++;
			chan->conn->sent++;
4314 4315
		}
	}
4316

4317 4318 4319 4320
	if (hdev->le_pkts)
		hdev->le_cnt = cnt;
	else
		hdev->acl_cnt = cnt;
4321 4322 4323

	if (cnt != tmp)
		hci_prio_recalculate(hdev, LE_LINK);
4324 4325
}

4326
static void hci_tx_work(struct work_struct *work)
L
Linus Torvalds 已提交
4327
{
4328
	struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
L
Linus Torvalds 已提交
4329 4330
	struct sk_buff *skb;

4331
	BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4332
	       hdev->sco_cnt, hdev->le_cnt);
L
Linus Torvalds 已提交
4333

4334
	if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4335 4336 4337 4338 4339 4340
		/* Schedule queues and send stuff to HCI driver */
		hci_sched_acl(hdev);
		hci_sched_sco(hdev);
		hci_sched_esco(hdev);
		hci_sched_le(hdev);
	}
4341

L
Linus Torvalds 已提交
4342 4343
	/* Send next queued raw (unknown type) packet */
	while ((skb = skb_dequeue(&hdev->raw_q)))
4344
		hci_send_frame(hdev, skb);
L
Linus Torvalds 已提交
4345 4346
}

L
Lucas De Marchi 已提交
4347
/* ----- HCI RX task (incoming data processing) ----- */
L
Linus Torvalds 已提交
4348 4349

/* ACL data packet */
4350
static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
L
Linus Torvalds 已提交
4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361
{
	struct hci_acl_hdr *hdr = (void *) skb->data;
	struct hci_conn *conn;
	__u16 handle, flags;

	skb_pull(skb, HCI_ACL_HDR_SIZE);

	handle = __le16_to_cpu(hdr->handle);
	flags  = hci_flags(handle);
	handle = hci_handle(handle);

4362
	BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4363
	       handle, flags);
L
Linus Torvalds 已提交
4364 4365 4366 4367 4368 4369

	hdev->stat.acl_rx++;

	hci_dev_lock(hdev);
	conn = hci_conn_hash_lookup_handle(hdev, handle);
	hci_dev_unlock(hdev);
4370

L
Linus Torvalds 已提交
4371
	if (conn) {
4372
		hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4373

L
Linus Torvalds 已提交
4374
		/* Send to upper protocol */
4375 4376
		l2cap_recv_acldata(conn, skb, flags);
		return;
L
Linus Torvalds 已提交
4377
	} else {
4378 4379
		bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
			   handle);
L
Linus Torvalds 已提交
4380 4381 4382 4383 4384 4385
	}

	kfree_skb(skb);
}

/* SCO data packet */
4386
static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
L
Linus Torvalds 已提交
4387 4388 4389 4390 4391 4392 4393 4394 4395
{
	struct hci_sco_hdr *hdr = (void *) skb->data;
	struct hci_conn *conn;
	__u16 handle;

	skb_pull(skb, HCI_SCO_HDR_SIZE);

	handle = __le16_to_cpu(hdr->handle);

4396
	BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
L
Linus Torvalds 已提交
4397 4398 4399 4400 4401 4402 4403 4404 4405

	hdev->stat.sco_rx++;

	hci_dev_lock(hdev);
	conn = hci_conn_hash_lookup_handle(hdev, handle);
	hci_dev_unlock(hdev);

	if (conn) {
		/* Send to upper protocol */
4406 4407
		sco_recv_scodata(conn, skb);
		return;
L
Linus Torvalds 已提交
4408
	} else {
4409 4410
		bt_dev_err(hdev, "SCO packet for unknown connection handle %d",
			   handle);
L
Linus Torvalds 已提交
4411 4412 4413 4414 4415
	}

	kfree_skb(skb);
}

4416 4417 4418 4419 4420 4421 4422 4423
static bool hci_req_is_complete(struct hci_dev *hdev)
{
	struct sk_buff *skb;

	skb = skb_peek(&hdev->cmd_q);
	if (!skb)
		return true;

4424
	return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
4425 4426
}

4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448
static void hci_resend_last(struct hci_dev *hdev)
{
	struct hci_command_hdr *sent;
	struct sk_buff *skb;
	u16 opcode;

	if (!hdev->sent_cmd)
		return;

	sent = (void *) hdev->sent_cmd->data;
	opcode = __le16_to_cpu(sent->opcode);
	if (opcode == HCI_OP_RESET)
		return;

	skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
	if (!skb)
		return;

	skb_queue_head(&hdev->cmd_q, skb);
	queue_work(hdev->workqueue, &hdev->cmd_work);
}

4449 4450 4451
void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
			  hci_req_complete_t *req_complete,
			  hci_req_complete_skb_t *req_complete_skb)
4452 4453 4454 4455 4456 4457
{
	struct sk_buff *skb;
	unsigned long flags;

	BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);

4458 4459
	/* If the completed command doesn't match the last one that was
	 * sent we need to do special handling of it.
4460
	 */
4461 4462 4463 4464 4465 4466 4467 4468 4469 4470
	if (!hci_sent_cmd_data(hdev, opcode)) {
		/* Some CSR based controllers generate a spontaneous
		 * reset complete event during init and any pending
		 * command will never be completed. In such a case we
		 * need to resend whatever was the last sent
		 * command.
		 */
		if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
			hci_resend_last(hdev);

4471
		return;
4472
	}
4473

4474 4475 4476
	/* If we reach this point this event matches the last command sent */
	hci_dev_clear_flag(hdev, HCI_CMD_PENDING);

4477 4478 4479 4480 4481 4482 4483 4484 4485 4486
	/* If the command succeeded and there's still more commands in
	 * this request the request is not yet complete.
	 */
	if (!status && !hci_req_is_complete(hdev))
		return;

	/* If this was the last command in a request the complete
	 * callback would be found in hdev->sent_cmd instead of the
	 * command queue (hdev->cmd_q).
	 */
4487 4488
	if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
		*req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4489 4490
		return;
	}
4491

4492 4493
	if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
		*req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4494
		return;
4495 4496 4497 4498 4499
	}

	/* Remove all pending commands belonging to this request */
	spin_lock_irqsave(&hdev->cmd_q.lock, flags);
	while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4500
		if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4501 4502 4503 4504
			__skb_queue_head(&hdev->cmd_q, skb);
			break;
		}

4505 4506 4507 4508
		if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
			*req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
		else
			*req_complete = bt_cb(skb)->hci.req_complete;
4509 4510 4511 4512 4513
		kfree_skb(skb);
	}
	spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
}

4514
static void hci_rx_work(struct work_struct *work)
L
Linus Torvalds 已提交
4515
{
4516
	struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
L
Linus Torvalds 已提交
4517 4518 4519 4520 4521
	struct sk_buff *skb;

	BT_DBG("%s", hdev->name);

	while ((skb = skb_dequeue(&hdev->rx_q))) {
4522 4523 4524
		/* Send copy to monitor */
		hci_send_to_monitor(hdev, skb);

L
Linus Torvalds 已提交
4525 4526
		if (atomic_read(&hdev->promisc)) {
			/* Send copy to the sockets */
4527
			hci_send_to_sock(hdev, skb);
L
Linus Torvalds 已提交
4528 4529
		}

4530 4531 4532 4533 4534 4535 4536 4537
		/* If the device has been opened in HCI_USER_CHANNEL,
		 * the userspace has exclusive access to device.
		 * When device is HCI_INIT, we still need to process
		 * the data packets to the driver in order
		 * to complete its setup().
		 */
		if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
		    !test_bit(HCI_INIT, &hdev->flags)) {
L
Linus Torvalds 已提交
4538 4539 4540 4541 4542 4543
			kfree_skb(skb);
			continue;
		}

		if (test_bit(HCI_INIT, &hdev->flags)) {
			/* Don't process data packets in this states. */
4544
			switch (hci_skb_pkt_type(skb)) {
L
Linus Torvalds 已提交
4545 4546
			case HCI_ACLDATA_PKT:
			case HCI_SCODATA_PKT:
4547
			case HCI_ISODATA_PKT:
L
Linus Torvalds 已提交
4548 4549
				kfree_skb(skb);
				continue;
4550
			}
L
Linus Torvalds 已提交
4551 4552 4553
		}

		/* Process frame */
4554
		switch (hci_skb_pkt_type(skb)) {
L
Linus Torvalds 已提交
4555
		case HCI_EVENT_PKT:
4556
			BT_DBG("%s Event packet", hdev->name);
L
Linus Torvalds 已提交
4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576
			hci_event_packet(hdev, skb);
			break;

		case HCI_ACLDATA_PKT:
			BT_DBG("%s ACL data packet", hdev->name);
			hci_acldata_packet(hdev, skb);
			break;

		case HCI_SCODATA_PKT:
			BT_DBG("%s SCO data packet", hdev->name);
			hci_scodata_packet(hdev, skb);
			break;

		default:
			kfree_skb(skb);
			break;
		}
	}
}

4577
static void hci_cmd_work(struct work_struct *work)
L
Linus Torvalds 已提交
4578
{
4579
	struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
L
Linus Torvalds 已提交
4580 4581
	struct sk_buff *skb;

4582 4583
	BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
	       atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
L
Linus Torvalds 已提交
4584 4585

	/* Send queued commands */
4586 4587 4588 4589 4590
	if (atomic_read(&hdev->cmd_cnt)) {
		skb = skb_dequeue(&hdev->cmd_q);
		if (!skb)
			return;

4591
		kfree_skb(hdev->sent_cmd);
L
Linus Torvalds 已提交
4592

4593
		hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4594
		if (hdev->sent_cmd) {
4595 4596
			if (hci_req_status_pend(hdev))
				hci_dev_set_flag(hdev, HCI_CMD_PENDING);
L
Linus Torvalds 已提交
4597
			atomic_dec(&hdev->cmd_cnt);
4598
			hci_send_frame(hdev, skb);
4599
			if (test_bit(HCI_RESET, &hdev->flags))
4600
				cancel_delayed_work(&hdev->cmd_timer);
4601
			else
4602 4603
				schedule_delayed_work(&hdev->cmd_timer,
						      HCI_CMD_TIMEOUT);
L
Linus Torvalds 已提交
4604 4605
		} else {
			skb_queue_head(&hdev->cmd_q, skb);
4606
			queue_work(hdev->workqueue, &hdev->cmd_work);
L
Linus Torvalds 已提交
4607 4608 4609
		}
	}
}
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