hci_core.c 106.4 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 <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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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 requests ----- */

#define HCI_REQ_DONE	  0
#define HCI_REQ_PEND	  1
#define HCI_REQ_CANCELED  2

#define hci_req_lock(d)		mutex_lock(&d->req_lock)
#define hci_req_unlock(d)	mutex_unlock(&d->req_lock)

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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;
	char buf[32];
	size_t buf_size = min(count, (sizeof(buf)-1));
	bool enable;

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

	if (copy_from_user(buf, user_buf, buf_size))
		return -EFAULT;

	buf[buf_size] = '\0';
	if (strtobool(buf, &enable))
		return -EINVAL;

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	if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
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		return -EALREADY;

	hci_req_lock(hdev);
	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);
	hci_req_unlock(hdev);

	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];

	buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y': 'N';
	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;
	char buf[32];
	size_t buf_size = min(count, (sizeof(buf)-1));
	bool enable;
	int err;

	if (copy_from_user(buf, user_buf, buf_size))
		return -EFAULT;

	buf[buf_size] = '\0';
	if (strtobool(buf, &enable))
		return -EINVAL;

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	/* When the diagnostic flags are not persistent and the transport
	 * is not active, then there is no need for the vendor callback.
	 *
	 * Instead just store the desired value. If needed the setting
	 * will be programmed when the controller gets powered on.
	 */
	if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
	    !test_bit(HCI_RUNNING, &hdev->flags))
		goto done;

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	hci_req_lock(hdev);
	err = hdev->set_diag(hdev, enable);
	hci_req_unlock(hdev);

	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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/* ---- HCI requests ---- */

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static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
				  struct sk_buff *skb)
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{
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	BT_DBG("%s result 0x%2.2x", hdev->name, result);
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	if (hdev->req_status == HCI_REQ_PEND) {
		hdev->req_result = result;
		hdev->req_status = HCI_REQ_DONE;
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		if (skb)
			hdev->req_skb = skb_get(skb);
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		wake_up_interruptible(&hdev->req_wait_q);
	}
}

static void hci_req_cancel(struct hci_dev *hdev, int err)
{
	BT_DBG("%s err 0x%2.2x", hdev->name, err);

	if (hdev->req_status == HCI_REQ_PEND) {
		hdev->req_result = err;
		hdev->req_status = HCI_REQ_CANCELED;
		wake_up_interruptible(&hdev->req_wait_q);
	}
}

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struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
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				  const void *param, u8 event, u32 timeout)
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{
	DECLARE_WAITQUEUE(wait, current);
	struct hci_request req;
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	struct sk_buff *skb;
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	int err = 0;

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

	hci_req_init(&req, hdev);

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	hci_req_add_ev(&req, opcode, plen, param, event);
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	hdev->req_status = HCI_REQ_PEND;

	add_wait_queue(&hdev->req_wait_q, &wait);
	set_current_state(TASK_INTERRUPTIBLE);

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	err = hci_req_run_skb(&req, hci_req_sync_complete);
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	if (err < 0) {
		remove_wait_queue(&hdev->req_wait_q, &wait);
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		set_current_state(TASK_RUNNING);
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		return ERR_PTR(err);
	}

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	schedule_timeout(timeout);

	remove_wait_queue(&hdev->req_wait_q, &wait);

	if (signal_pending(current))
		return ERR_PTR(-EINTR);

	switch (hdev->req_status) {
	case HCI_REQ_DONE:
		err = -bt_to_errno(hdev->req_result);
		break;

	case HCI_REQ_CANCELED:
		err = -hdev->req_result;
		break;

	default:
		err = -ETIMEDOUT;
		break;
	}

	hdev->req_status = hdev->req_result = 0;
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	skb = hdev->req_skb;
	hdev->req_skb = NULL;
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	BT_DBG("%s end: err %d", hdev->name, err);

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	if (err < 0) {
		kfree_skb(skb);
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		return ERR_PTR(err);
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	}
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	if (!skb)
		return ERR_PTR(-ENODATA);

	return skb;
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}
EXPORT_SYMBOL(__hci_cmd_sync_ev);

struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
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			       const void *param, u32 timeout)
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{
	return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
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}
EXPORT_SYMBOL(__hci_cmd_sync);

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/* Execute request and wait for completion. */
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static int __hci_req_sync(struct hci_dev *hdev,
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			  void (*func)(struct hci_request *req,
				      unsigned long opt),
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			  unsigned long opt, __u32 timeout)
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{
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	struct hci_request req;
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	DECLARE_WAITQUEUE(wait, current);
	int err = 0;

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

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	hci_req_init(&req, hdev);

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	hdev->req_status = HCI_REQ_PEND;

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	func(&req, opt);
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	add_wait_queue(&hdev->req_wait_q, &wait);
	set_current_state(TASK_INTERRUPTIBLE);

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	err = hci_req_run_skb(&req, hci_req_sync_complete);
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	if (err < 0) {
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		hdev->req_status = 0;
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		remove_wait_queue(&hdev->req_wait_q, &wait);
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		set_current_state(TASK_RUNNING);
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		/* ENODATA means the HCI request command queue is empty.
		 * This can happen when a request with conditionals doesn't
		 * trigger any commands to be sent. This is normal behavior
		 * and should not trigger an error return.
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		 */
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		if (err == -ENODATA)
			return 0;

		return err;
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	}

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	schedule_timeout(timeout);

	remove_wait_queue(&hdev->req_wait_q, &wait);

	if (signal_pending(current))
		return -EINTR;

	switch (hdev->req_status) {
	case HCI_REQ_DONE:
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		err = -bt_to_errno(hdev->req_result);
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		break;

	case HCI_REQ_CANCELED:
		err = -hdev->req_result;
		break;

	default:
		err = -ETIMEDOUT;
		break;
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	}
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	hdev->req_status = hdev->req_result = 0;
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	BT_DBG("%s end: err %d", hdev->name, err);

	return err;
}

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static int hci_req_sync(struct hci_dev *hdev,
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			void (*req)(struct hci_request *req,
				    unsigned long opt),
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			unsigned long opt, __u32 timeout)
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{
	int ret;

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

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	/* Serialize all requests */
	hci_req_lock(hdev);
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	ret = __hci_req_sync(hdev, req, opt, timeout);
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	hci_req_unlock(hdev);

	return ret;
}

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static void 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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}

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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 void amp_init2(struct hci_request *req)
{
	/* 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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static void 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) {
	case HCI_BREDR:
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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:
		BT_ERR("Unknown device type %d", hdev->dev_type);
		break;
	}
}

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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[0] |= 0x10; /* Disconnection Complete */
		events[1] |= 0x08; /* Read Remote Version Information Complete */
		events[1] |= 0x20; /* Command Complete */
		events[1] |= 0x40; /* Command Status */
		events[1] |= 0x80; /* Hardware Error */
		events[2] |= 0x04; /* Number of Completed Packets */
		events[3] |= 0x02; /* Data Buffer Overflow */
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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 void 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
608
		hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
609 610

	if (lmp_le_capable(hdev))
611
		le_setup(req);
612

613 614 615 616 617 618 619
	/* 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.
620
	 */
621 622
	if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
	    !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
623
		hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
624 625

	if (lmp_ssp_capable(hdev)) {
626 627 628 629 630 631 632 633
		/* 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;

634
		if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
635
			u8 mode = 0x01;
636

637 638
			hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
				    sizeof(mode), &mode);
639 640 641 642 643 644
		} else {
			struct hci_cp_write_eir cp;

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

645
			hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
646 647 648
		}
	}

649 650
	if (lmp_inq_rssi_capable(hdev) ||
	    test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
651 652 653 654 655 656 657 658 659 660
		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);
	}
661 662

	if (lmp_inq_tx_pwr_capable(hdev))
663
		hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
664 665 666 667 668

	if (lmp_ext_feat_capable(hdev)) {
		struct hci_cp_read_local_ext_features cp;

		cp.page = 0x01;
669 670
		hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
			    sizeof(cp), &cp);
671 672
	}

673
	if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
674
		u8 enable = 1;
675 676
		hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
			    &enable);
677 678 679
	}
}

680
static void hci_setup_link_policy(struct hci_request *req)
681
{
682
	struct hci_dev *hdev = req->hdev;
683 684 685 686 687 688 689 690 691 692 693 694 695
	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);
696
	hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
697 698
}

699
static void hci_set_le_support(struct hci_request *req)
700
{
701
	struct hci_dev *hdev = req->hdev;
702 703
	struct hci_cp_write_le_host_supported cp;

704 705 706 707
	/* LE-only devices do not support explicit enablement */
	if (!lmp_bredr_capable(hdev))
		return;

708 709
	memset(&cp, 0, sizeof(cp));

710
	if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
711
		cp.le = 0x01;
712
		cp.simul = 0x00;
713 714 715
	}

	if (cp.le != lmp_host_le_capable(hdev))
716 717
		hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
			    &cp);
718 719
}

720 721 722 723 724 725 726 727
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 };

	/* If Connectionless Slave Broadcast master role is supported
	 * enable all necessary events for it.
	 */
728
	if (lmp_csb_master_capable(hdev)) {
729 730 731 732 733 734 735 736 737
		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 */
	}

	/* If Connectionless Slave Broadcast slave role is supported
	 * enable all necessary events for it.
	 */
738
	if (lmp_csb_slave_capable(hdev)) {
739 740 741 742 743 744
		events[2] |= 0x01;	/* Synchronization Train Received */
		events[2] |= 0x02;	/* CSB Receive */
		events[2] |= 0x04;	/* CSB Timeout */
		events[2] |= 0x08;	/* Truncated Page Complete */
	}

745
	/* Enable Authenticated Payload Timeout Expired event if supported */
746
	if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING)
747 748
		events[2] |= 0x80;

749 750 751
	hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2, sizeof(events), events);
}

752
static void hci_init3_req(struct hci_request *req, unsigned long opt)
753
{
754
	struct hci_dev *hdev = req->hdev;
755
	u8 p;
756

757 758
	hci_setup_event_mask(req);

759 760
	if (hdev->commands[6] & 0x20 &&
	    !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
761 762 763 764 765 766 767
		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);
	}

768
	if (hdev->commands[5] & 0x10)
769
		hci_setup_link_policy(req);
770

771 772 773 774 775 776 777 778 779 780
	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);

781 782 783 784
	if (lmp_le_capable(hdev)) {
		u8 events[8];

		memset(events, 0, sizeof(events));
785 786 787

		if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
			events[0] |= 0x10;	/* LE Long Term Key Request */
788 789 790 791 792 793 794 795 796

		/* 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
						 */

797 798 799 800 801 802
		/* 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 */

803 804 805 806 807 808 809 810
		/* 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
						 */

811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838
		/* 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
						 */

839 840 841 842 843 844 845 846 847 848 849 850 851 852
		/* 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 */

853 854 855
		hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
			    events);

856 857 858 859 860
		if (hdev->commands[25] & 0x40) {
			/* Read LE Advertising Channel TX Power */
			hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
		}

861 862 863 864 865 866 867 868 869 870 871
		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);
		}

872 873 874 875 876 877 878 879
		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);
		}

880
		hci_set_le_support(req);
881
	}
882 883 884 885 886 887 888 889 890

	/* 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);
	}
891 892
}

893 894 895 896
static void hci_init4_req(struct hci_request *req, unsigned long opt)
{
	struct hci_dev *hdev = req->hdev;

897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919
	/* 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);
	}

920 921 922 923
	/* 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);

924 925 926 927
	/* 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);

928 929 930 931
	/* 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);

932
	/* Check for Synchronization Train support */
933
	if (lmp_sync_train_capable(hdev))
934
		hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
935 936

	/* Enable Secure Connections if supported and configured */
937
	if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
938
	    bredr_sc_enabled(hdev)) {
939
		u8 support = 0x01;
940

941 942 943
		hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
			    sizeof(support), &support);
	}
944 945
}

946 947 948 949 950 951 952 953
static int __hci_init(struct hci_dev *hdev)
{
	int err;

	err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
	if (err < 0)
		return err;

954 955
	if (hci_dev_test_flag(hdev, HCI_SETUP))
		hci_debugfs_create_basic(hdev);
956

957 958 959 960
	err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
	if (err < 0)
		return err;

961 962
	/* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
	 * BR/EDR/LE type controllers. AMP controllers only need the
963
	 * first two stages of init.
964 965 966 967
	 */
	if (hdev->dev_type != HCI_BREDR)
		return 0;

968 969 970 971
	err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
	if (err < 0)
		return err;

972 973 974 975
	err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
	if (err < 0)
		return err;

976 977 978 979 980 981 982 983 984 985 986
	/* 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.
987
	 */
988 989
	if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
	    !hci_dev_test_flag(hdev, HCI_CONFIG))
990 991
		return 0;

992 993
	hci_debugfs_create_common(hdev);

994
	if (lmp_bredr_capable(hdev))
995
		hci_debugfs_create_bredr(hdev);
996

997
	if (lmp_le_capable(hdev))
998
		hci_debugfs_create_le(hdev);
999

1000
	return 0;
1001 1002
}

1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
static void hci_init0_req(struct hci_request *req, unsigned long opt)
{
	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);
}

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

1025 1026 1027
	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
		return 0;

1028 1029 1030 1031
	err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
	if (err < 0)
		return err;

1032 1033 1034
	if (hci_dev_test_flag(hdev, HCI_SETUP))
		hci_debugfs_create_basic(hdev);

1035 1036 1037
	return 0;
}

1038
static void hci_scan_req(struct hci_request *req, unsigned long opt)
L
Linus Torvalds 已提交
1039 1040 1041
{
	__u8 scan = opt;

1042
	BT_DBG("%s %x", req->hdev->name, scan);
L
Linus Torvalds 已提交
1043 1044

	/* Inquiry and Page scans */
1045
	hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
L
Linus Torvalds 已提交
1046 1047
}

1048
static void hci_auth_req(struct hci_request *req, unsigned long opt)
L
Linus Torvalds 已提交
1049 1050 1051
{
	__u8 auth = opt;

1052
	BT_DBG("%s %x", req->hdev->name, auth);
L
Linus Torvalds 已提交
1053 1054

	/* Authentication */
1055
	hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
L
Linus Torvalds 已提交
1056 1057
}

1058
static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
L
Linus Torvalds 已提交
1059 1060 1061
{
	__u8 encrypt = opt;

1062
	BT_DBG("%s %x", req->hdev->name, encrypt);
L
Linus Torvalds 已提交
1063

1064
	/* Encryption */
1065
	hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
L
Linus Torvalds 已提交
1066 1067
}

1068
static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
1069 1070 1071
{
	__le16 policy = cpu_to_le16(opt);

1072
	BT_DBG("%s %x", req->hdev->name, policy);
1073 1074

	/* Default link policy */
1075
	hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
1076 1077
}

1078
/* Get HCI device by index.
L
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1079 1080 1081
 * Device is held on return. */
struct hci_dev *hci_dev_get(int index)
{
1082
	struct hci_dev *hdev = NULL, *d;
L
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1083 1084 1085 1086 1087 1088 1089

	BT_DBG("%d", index);

	if (index < 0)
		return NULL;

	read_lock(&hci_dev_list_lock);
1090
	list_for_each_entry(d, &hci_dev_list, list) {
L
Linus Torvalds 已提交
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
		if (d->id == index) {
			hdev = hci_dev_hold(d);
			break;
		}
	}
	read_unlock(&hci_dev_list_lock);
	return hdev;
}

/* ---- Inquiry support ---- */
1101

1102 1103 1104 1105
bool hci_discovery_active(struct hci_dev *hdev)
{
	struct discovery_state *discov = &hdev->discovery;

A
Andre Guedes 已提交
1106
	switch (discov->state) {
1107
	case DISCOVERY_FINDING:
A
Andre Guedes 已提交
1108
	case DISCOVERY_RESOLVING:
1109 1110
		return true;

A
Andre Guedes 已提交
1111 1112 1113
	default:
		return false;
	}
1114 1115
}

1116 1117
void hci_discovery_set_state(struct hci_dev *hdev, int state)
{
1118 1119
	int old_state = hdev->discovery.state;

1120 1121
	BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);

1122
	if (old_state == state)
1123 1124
		return;

1125 1126
	hdev->discovery.state = state;

1127 1128
	switch (state) {
	case DISCOVERY_STOPPED:
1129 1130
		hci_update_background_scan(hdev);

1131
		if (old_state != DISCOVERY_STARTING)
1132
			mgmt_discovering(hdev, 0);
1133 1134 1135
		break;
	case DISCOVERY_STARTING:
		break;
1136
	case DISCOVERY_FINDING:
1137 1138
		mgmt_discovering(hdev, 1);
		break;
1139 1140
	case DISCOVERY_RESOLVING:
		break;
1141 1142 1143 1144 1145
	case DISCOVERY_STOPPING:
		break;
	}
}

1146
void hci_inquiry_cache_flush(struct hci_dev *hdev)
L
Linus Torvalds 已提交
1147
{
1148
	struct discovery_state *cache = &hdev->discovery;
1149
	struct inquiry_entry *p, *n;
L
Linus Torvalds 已提交
1150

1151 1152
	list_for_each_entry_safe(p, n, &cache->all, all) {
		list_del(&p->all);
1153
		kfree(p);
L
Linus Torvalds 已提交
1154
	}
1155 1156 1157

	INIT_LIST_HEAD(&cache->unknown);
	INIT_LIST_HEAD(&cache->resolve);
L
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1158 1159
}

1160 1161
struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
					       bdaddr_t *bdaddr)
L
Linus Torvalds 已提交
1162
{
1163
	struct discovery_state *cache = &hdev->discovery;
L
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1164 1165
	struct inquiry_entry *e;

1166
	BT_DBG("cache %p, %pMR", cache, bdaddr);
L
Linus Torvalds 已提交
1167

1168 1169 1170 1171 1172 1173 1174 1175 1176
	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,
1177
						       bdaddr_t *bdaddr)
1178
{
1179
	struct discovery_state *cache = &hdev->discovery;
1180 1181
	struct inquiry_entry *e;

1182
	BT_DBG("cache %p, %pMR", cache, bdaddr);
1183 1184

	list_for_each_entry(e, &cache->unknown, list) {
L
Linus Torvalds 已提交
1185
		if (!bacmp(&e->data.bdaddr, bdaddr))
1186 1187 1188 1189
			return e;
	}

	return NULL;
L
Linus Torvalds 已提交
1190 1191
}

1192
struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
1193 1194
						       bdaddr_t *bdaddr,
						       int state)
1195 1196 1197 1198
{
	struct discovery_state *cache = &hdev->discovery;
	struct inquiry_entry *e;

1199
	BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210

	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;
}

1211
void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
1212
				      struct inquiry_entry *ie)
1213 1214 1215 1216 1217 1218 1219 1220 1221
{
	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 &&
1222
		    abs(p->data.rssi) >= abs(ie->data.rssi))
1223 1224 1225 1226 1227 1228 1229
			break;
		pos = &p->list;
	}

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

1230 1231
u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
			     bool name_known)
L
Linus Torvalds 已提交
1232
{
1233
	struct discovery_state *cache = &hdev->discovery;
A
Andrei Emeltchenko 已提交
1234
	struct inquiry_entry *ie;
1235
	u32 flags = 0;
L
Linus Torvalds 已提交
1236

1237
	BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
L
Linus Torvalds 已提交
1238

1239
	hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
1240

1241 1242
	if (!data->ssp_mode)
		flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1243

A
Andrei Emeltchenko 已提交
1244
	ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
1245
	if (ie) {
1246 1247
		if (!ie->data.ssp_mode)
			flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
1248

1249
		if (ie->name_state == NAME_NEEDED &&
1250
		    data->rssi != ie->data.rssi) {
1251 1252 1253 1254
			ie->data.rssi = data->rssi;
			hci_inquiry_cache_update_resolve(hdev, ie);
		}

1255
		goto update;
1256
	}
1257 1258

	/* Entry not in the cache. Add new one. */
1259
	ie = kzalloc(sizeof(*ie), GFP_KERNEL);
1260 1261 1262 1263
	if (!ie) {
		flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
		goto done;
	}
1264 1265 1266 1267 1268 1269 1270 1271 1272

	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);
	}
A
Andrei Emeltchenko 已提交
1273

1274 1275
update:
	if (name_known && ie->name_state != NAME_KNOWN &&
1276
	    ie->name_state != NAME_PENDING) {
1277 1278
		ie->name_state = NAME_KNOWN;
		list_del(&ie->list);
L
Linus Torvalds 已提交
1279 1280
	}

A
Andrei Emeltchenko 已提交
1281 1282
	memcpy(&ie->data, data, sizeof(*data));
	ie->timestamp = jiffies;
L
Linus Torvalds 已提交
1283
	cache->timestamp = jiffies;
1284 1285

	if (ie->name_state == NAME_NOT_KNOWN)
1286
		flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
1287

1288 1289
done:
	return flags;
L
Linus Torvalds 已提交
1290 1291 1292 1293
}

static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
{
1294
	struct discovery_state *cache = &hdev->discovery;
L
Linus Torvalds 已提交
1295 1296 1297 1298
	struct inquiry_info *info = (struct inquiry_info *) buf;
	struct inquiry_entry *e;
	int copied = 0;

1299
	list_for_each_entry(e, &cache->all, all) {
L
Linus Torvalds 已提交
1300
		struct inquiry_data *data = &e->data;
1301 1302 1303 1304

		if (copied >= num)
			break;

L
Linus Torvalds 已提交
1305 1306 1307 1308 1309 1310
		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;
1311

L
Linus Torvalds 已提交
1312
		info++;
1313
		copied++;
L
Linus Torvalds 已提交
1314 1315 1316 1317 1318 1319
	}

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

1320
static void hci_inq_req(struct hci_request *req, unsigned long opt)
L
Linus Torvalds 已提交
1321 1322
{
	struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
1323
	struct hci_dev *hdev = req->hdev;
L
Linus Torvalds 已提交
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
	struct hci_cp_inquiry cp;

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

	if (test_bit(HCI_INQUIRY, &hdev->flags))
		return;

	/* Start Inquiry */
	memcpy(&cp.lap, &ir->lap, 3);
	cp.length  = ir->length;
	cp.num_rsp = ir->num_rsp;
1335
	hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
L
Linus Torvalds 已提交
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
}

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;

1350 1351
	hdev = hci_dev_get(ir.dev_id);
	if (!hdev)
L
Linus Torvalds 已提交
1352 1353
		return -ENODEV;

1354
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1355 1356 1357 1358
		err = -EBUSY;
		goto done;
	}

1359
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1360 1361 1362 1363
		err = -EOPNOTSUPP;
		goto done;
	}

1364 1365 1366 1367 1368
	if (hdev->dev_type != HCI_BREDR) {
		err = -EOPNOTSUPP;
		goto done;
	}

1369
	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1370 1371 1372 1373
		err = -EOPNOTSUPP;
		goto done;
	}

1374
	hci_dev_lock(hdev);
1375
	if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
1376
	    inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
1377
		hci_inquiry_cache_flush(hdev);
L
Linus Torvalds 已提交
1378 1379
		do_inquiry = 1;
	}
1380
	hci_dev_unlock(hdev);
L
Linus Torvalds 已提交
1381

1382
	timeo = ir.length * msecs_to_jiffies(2000);
A
Andrei Emeltchenko 已提交
1383 1384

	if (do_inquiry) {
1385 1386
		err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
				   timeo);
A
Andrei Emeltchenko 已提交
1387 1388
		if (err < 0)
			goto done;
1389 1390 1391 1392

		/* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
		 * cleared). If it is interrupted by a signal, return -EINTR.
		 */
1393
		if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
1394 1395
				TASK_INTERRUPTIBLE))
			return -EINTR;
A
Andrei Emeltchenko 已提交
1396
	}
L
Linus Torvalds 已提交
1397

1398 1399 1400
	/* for unlimited number of responses we will use buffer with
	 * 255 entries
	 */
L
Linus Torvalds 已提交
1401 1402 1403 1404 1405
	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.
	 */
1406
	buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
A
Andrei Emeltchenko 已提交
1407
	if (!buf) {
L
Linus Torvalds 已提交
1408 1409 1410 1411
		err = -ENOMEM;
		goto done;
	}

1412
	hci_dev_lock(hdev);
L
Linus Torvalds 已提交
1413
	ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
1414
	hci_dev_unlock(hdev);
L
Linus Torvalds 已提交
1415 1416 1417 1418 1419 1420

	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) *
1421
				 ir.num_rsp))
L
Linus Torvalds 已提交
1422
			err = -EFAULT;
1423
	} else
L
Linus Torvalds 已提交
1424 1425 1426 1427 1428 1429 1430 1431 1432
		err = -EFAULT;

	kfree(buf);

done:
	hci_dev_put(hdev);
	return err;
}

1433
static int hci_dev_do_open(struct hci_dev *hdev)
L
Linus Torvalds 已提交
1434 1435 1436 1437 1438 1439 1440
{
	int ret = 0;

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

	hci_req_lock(hdev);

1441
	if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1442 1443 1444 1445
		ret = -ENODEV;
		goto done;
	}

1446 1447
	if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
1448 1449 1450
		/* Check for rfkill but allow the HCI setup stage to
		 * proceed (which in itself doesn't cause any RF activity).
		 */
1451
		if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
1452 1453 1454 1455 1456 1457 1458 1459 1460
			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.
		 *
1461 1462 1463 1464
		 * In case of user channel usage, it is not important
		 * if a public address or static random address is
		 * available.
		 *
1465 1466 1467
		 * This check is only valid for BR/EDR controllers
		 * since AMP controllers do not have an address.
		 */
1468
		if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1469
		    hdev->dev_type == HCI_BREDR &&
1470 1471 1472 1473 1474
		    !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
		    !bacmp(&hdev->static_addr, BDADDR_ANY)) {
			ret = -EADDRNOTAVAIL;
			goto done;
		}
1475 1476
	}

L
Linus Torvalds 已提交
1477 1478 1479 1480 1481 1482 1483 1484 1485 1486
	if (test_bit(HCI_UP, &hdev->flags)) {
		ret = -EALREADY;
		goto done;
	}

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

1487
	set_bit(HCI_RUNNING, &hdev->flags);
1488
	hci_sock_dev_event(hdev, HCI_DEV_OPEN);
1489

1490 1491 1492
	atomic_set(&hdev->cmd_cnt, 1);
	set_bit(HCI_INIT, &hdev->flags);

1493
	if (hci_dev_test_flag(hdev, HCI_SETUP)) {
1494 1495
		hci_sock_dev_event(hdev, HCI_DEV_SETUP);

1496 1497
		if (hdev->setup)
			ret = hdev->setup(hdev);
1498

1499 1500 1501 1502 1503 1504
		/* The transport driver can set these quirks before
		 * creating the HCI device or in its setup callback.
		 *
		 * In case any of them is set, the controller has to
		 * start up as unconfigured.
		 */
1505 1506
		if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
		    test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
1507
			hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
1508

1509 1510 1511 1512 1513 1514 1515 1516
		/* 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.
		 */
1517
		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1518
			ret = __hci_unconf_init(hdev);
1519 1520
	}

1521
	if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
1522 1523 1524 1525 1526 1527 1528
		/* 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)
1529 1530 1531 1532 1533
			ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
		else
			ret = -EADDRNOTAVAIL;
	}

1534
	if (!ret) {
1535
		if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1536
		    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1537
			ret = __hci_init(hdev);
1538 1539 1540
			if (!ret && hdev->post_init)
				ret = hdev->post_init(hdev);
		}
L
Linus Torvalds 已提交
1541 1542
	}

1543 1544 1545 1546 1547 1548 1549 1550
	/* 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) &&
	    hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
		ret = hdev->set_diag(hdev, true);

1551 1552
	clear_bit(HCI_INIT, &hdev->flags);

L
Linus Torvalds 已提交
1553 1554
	if (!ret) {
		hci_dev_hold(hdev);
1555
		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
L
Linus Torvalds 已提交
1556
		set_bit(HCI_UP, &hdev->flags);
1557
		hci_sock_dev_event(hdev, HCI_DEV_UP);
1558 1559 1560 1561
		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) &&
1562
		    hdev->dev_type == HCI_BREDR) {
1563
			hci_dev_lock(hdev);
1564
			mgmt_powered(hdev, 1);
1565
			hci_dev_unlock(hdev);
1566
		}
1567
	} else {
L
Linus Torvalds 已提交
1568
		/* Init failed, cleanup */
1569
		flush_work(&hdev->tx_work);
1570
		flush_work(&hdev->cmd_work);
1571
		flush_work(&hdev->rx_work);
L
Linus Torvalds 已提交
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583

		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;
		}

1584
		clear_bit(HCI_RUNNING, &hdev->flags);
1585
		hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1586

L
Linus Torvalds 已提交
1587
		hdev->close(hdev);
1588
		hdev->flags &= BIT(HCI_RAW);
L
Linus Torvalds 已提交
1589 1590 1591 1592 1593 1594 1595
	}

done:
	hci_req_unlock(hdev);
	return ret;
}

1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606
/* ---- HCI ioctl helpers ---- */

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

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

1607
	/* Devices that are marked as unconfigured can only be powered
1608 1609 1610 1611 1612 1613 1614 1615
	 * 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.
	 */
1616 1617
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1618 1619 1620 1621
		err = -EOPNOTSUPP;
		goto done;
	}

1622 1623 1624 1625 1626
	/* 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.
	 */
1627
	if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1628 1629
		cancel_delayed_work(&hdev->power_off);

1630 1631 1632 1633
	/* 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.
	 */
1634 1635
	flush_workqueue(hdev->req_workqueue);

1636
	/* For controllers not using the management interface and that
1637
	 * are brought up using legacy ioctl, set the HCI_BONDABLE bit
1638 1639 1640 1641
	 * 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.
	 */
1642 1643
	if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
	    !hci_dev_test_flag(hdev, HCI_MGMT))
1644
		hci_dev_set_flag(hdev, HCI_BONDABLE);
1645

1646 1647
	err = hci_dev_do_open(hdev);

1648
done:
1649 1650 1651 1652
	hci_dev_put(hdev);
	return err;
}

1653 1654 1655 1656 1657
/* This function requires the caller holds hdev->lock */
static void hci_pend_le_actions_clear(struct hci_dev *hdev)
{
	struct hci_conn_params *p;

1658 1659 1660
	list_for_each_entry(p, &hdev->le_conn_params, list) {
		if (p->conn) {
			hci_conn_drop(p->conn);
1661
			hci_conn_put(p->conn);
1662 1663
			p->conn = NULL;
		}
1664
		list_del_init(&p->action);
1665
	}
1666 1667 1668 1669

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

1670
int hci_dev_do_close(struct hci_dev *hdev)
L
Linus Torvalds 已提交
1671
{
1672 1673
	bool auto_off;

L
Linus Torvalds 已提交
1674 1675
	BT_DBG("%s %p", hdev->name, hdev);

1676
	if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
1677
	    !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
1678
	    test_bit(HCI_UP, &hdev->flags)) {
1679 1680 1681 1682 1683
		/* Execute vendor specific shutdown routine */
		if (hdev->shutdown)
			hdev->shutdown(hdev);
	}

1684 1685
	cancel_delayed_work(&hdev->power_off);

L
Linus Torvalds 已提交
1686 1687 1688 1689
	hci_req_cancel(hdev, ENODEV);
	hci_req_lock(hdev);

	if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
1690
		cancel_delayed_work_sync(&hdev->cmd_timer);
L
Linus Torvalds 已提交
1691 1692 1693 1694
		hci_req_unlock(hdev);
		return 0;
	}

1695 1696
	/* Flush RX and TX works */
	flush_work(&hdev->tx_work);
1697
	flush_work(&hdev->rx_work);
L
Linus Torvalds 已提交
1698

1699
	if (hdev->discov_timeout > 0) {
1700
		cancel_delayed_work(&hdev->discov_off);
1701
		hdev->discov_timeout = 0;
1702 1703
		hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1704 1705
	}

1706
	if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
1707 1708
		cancel_delayed_work(&hdev->service_cache);

A
Andre Guedes 已提交
1709
	cancel_delayed_work_sync(&hdev->le_scan_disable);
1710
	cancel_delayed_work_sync(&hdev->le_scan_restart);
1711

1712
	if (hci_dev_test_flag(hdev, HCI_MGMT))
1713
		cancel_delayed_work_sync(&hdev->rpa_expired);
A
Andre Guedes 已提交
1714

1715 1716 1717 1718 1719
	if (hdev->adv_instance_timeout) {
		cancel_delayed_work_sync(&hdev->adv_instance_expire);
		hdev->adv_instance_timeout = 0;
	}

1720 1721 1722 1723 1724
	/* Avoid potential lockdep warnings from the *_flush() calls by
	 * ensuring the workqueue is empty up front.
	 */
	drain_workqueue(hdev->workqueue);

1725
	hci_dev_lock(hdev);
1726

1727 1728
	hci_discovery_set_state(hdev, DISCOVERY_STOPPED);

1729 1730 1731 1732
	auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);

	if (!auto_off && hdev->dev_type == HCI_BREDR)
		mgmt_powered(hdev, 0);
1733

1734
	hci_inquiry_cache_flush(hdev);
1735
	hci_pend_le_actions_clear(hdev);
1736
	hci_conn_hash_flush(hdev);
1737
	hci_dev_unlock(hdev);
L
Linus Torvalds 已提交
1738

1739 1740
	smp_unregister(hdev);

1741
	hci_sock_dev_event(hdev, HCI_DEV_DOWN);
L
Linus Torvalds 已提交
1742 1743 1744 1745 1746 1747 1748

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

	/* Reset device */
	skb_queue_purge(&hdev->cmd_q);
	atomic_set(&hdev->cmd_cnt, 1);
1749 1750
	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
1751
		set_bit(HCI_INIT, &hdev->flags);
1752
		__hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
L
Linus Torvalds 已提交
1753 1754 1755
		clear_bit(HCI_INIT, &hdev->flags);
	}

1756 1757
	/* flush cmd  work */
	flush_work(&hdev->cmd_work);
L
Linus Torvalds 已提交
1758 1759 1760 1761 1762 1763 1764 1765

	/* 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) {
1766
		cancel_delayed_work_sync(&hdev->cmd_timer);
L
Linus Torvalds 已提交
1767 1768 1769 1770
		kfree_skb(hdev->sent_cmd);
		hdev->sent_cmd = NULL;
	}

1771
	clear_bit(HCI_RUNNING, &hdev->flags);
1772
	hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
1773

L
Linus Torvalds 已提交
1774 1775 1776 1777
	/* After this point our queues are empty
	 * and no tasks are scheduled. */
	hdev->close(hdev);

1778
	/* Clear flags */
1779
	hdev->flags &= BIT(HCI_RAW);
1780
	hci_dev_clear_volatile_flags(hdev);
1781

1782
	/* Controller radio is available but is currently powered down */
1783
	hdev->amp_status = AMP_STATUS_POWERED_DOWN;
1784

1785
	memset(hdev->eir, 0, sizeof(hdev->eir));
1786
	memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
1787
	bacpy(&hdev->random_addr, BDADDR_ANY);
1788

L
Linus Torvalds 已提交
1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799
	hci_req_unlock(hdev);

	hci_dev_put(hdev);
	return 0;
}

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

A
Andrei Emeltchenko 已提交
1800 1801
	hdev = hci_dev_get(dev);
	if (!hdev)
L
Linus Torvalds 已提交
1802
		return -ENODEV;
1803

1804
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1805 1806 1807 1808
		err = -EBUSY;
		goto done;
	}

1809
	if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
1810 1811
		cancel_delayed_work(&hdev->power_off);

L
Linus Torvalds 已提交
1812
	err = hci_dev_do_close(hdev);
1813

1814
done:
L
Linus Torvalds 已提交
1815 1816 1817 1818
	hci_dev_put(hdev);
	return err;
}

1819
static int hci_dev_do_reset(struct hci_dev *hdev)
L
Linus Torvalds 已提交
1820
{
1821
	int ret;
L
Linus Torvalds 已提交
1822

1823
	BT_DBG("%s %p", hdev->name, hdev);
L
Linus Torvalds 已提交
1824 1825 1826 1827 1828 1829 1830

	hci_req_lock(hdev);

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

1831 1832 1833 1834 1835
	/* Avoid potential lockdep warnings from the *_flush() calls by
	 * ensuring the workqueue is empty up front.
	 */
	drain_workqueue(hdev->workqueue);

1836
	hci_dev_lock(hdev);
1837
	hci_inquiry_cache_flush(hdev);
L
Linus Torvalds 已提交
1838
	hci_conn_hash_flush(hdev);
1839
	hci_dev_unlock(hdev);
L
Linus Torvalds 已提交
1840 1841 1842 1843

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

1844
	atomic_set(&hdev->cmd_cnt, 1);
1845
	hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
L
Linus Torvalds 已提交
1846

1847
	ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
L
Linus Torvalds 已提交
1848 1849 1850 1851 1852

	hci_req_unlock(hdev);
	return ret;
}

1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866
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;
	}

1867
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1868 1869 1870 1871
		err = -EBUSY;
		goto done;
	}

1872
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883
		err = -EOPNOTSUPP;
		goto done;
	}

	err = hci_dev_do_reset(hdev);

done:
	hci_dev_put(hdev);
	return err;
}

L
Linus Torvalds 已提交
1884 1885 1886 1887 1888
int hci_dev_reset_stat(__u16 dev)
{
	struct hci_dev *hdev;
	int ret = 0;

A
Andrei Emeltchenko 已提交
1889 1890
	hdev = hci_dev_get(dev);
	if (!hdev)
L
Linus Torvalds 已提交
1891 1892
		return -ENODEV;

1893
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1894 1895 1896 1897
		ret = -EBUSY;
		goto done;
	}

1898
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1899 1900 1901 1902
		ret = -EOPNOTSUPP;
		goto done;
	}

L
Linus Torvalds 已提交
1903 1904
	memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));

1905
done:
L
Linus Torvalds 已提交
1906 1907 1908 1909
	hci_dev_put(hdev);
	return ret;
}

1910 1911
static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
{
1912
	bool conn_changed, discov_changed;
1913 1914 1915 1916

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

	if ((scan & SCAN_PAGE))
1917 1918
		conn_changed = !hci_dev_test_and_set_flag(hdev,
							  HCI_CONNECTABLE);
1919
	else
1920 1921
		conn_changed = hci_dev_test_and_clear_flag(hdev,
							   HCI_CONNECTABLE);
1922

1923
	if ((scan & SCAN_INQUIRY)) {
1924 1925
		discov_changed = !hci_dev_test_and_set_flag(hdev,
							    HCI_DISCOVERABLE);
1926
	} else {
1927
		hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
1928 1929
		discov_changed = hci_dev_test_and_clear_flag(hdev,
							     HCI_DISCOVERABLE);
1930 1931
	}

1932
	if (!hci_dev_test_flag(hdev, HCI_MGMT))
1933 1934
		return;

1935 1936
	if (conn_changed || discov_changed) {
		/* In case this was disabled through mgmt */
1937
		hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
1938

1939
		if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
1940 1941
			mgmt_update_adv_data(hdev);

1942
		mgmt_new_settings(hdev);
1943
	}
1944 1945
}

L
Linus Torvalds 已提交
1946 1947 1948 1949 1950 1951 1952 1953 1954
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;

A
Andrei Emeltchenko 已提交
1955 1956
	hdev = hci_dev_get(dr.dev_id);
	if (!hdev)
L
Linus Torvalds 已提交
1957 1958
		return -ENODEV;

1959
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1960 1961 1962 1963
		err = -EBUSY;
		goto done;
	}

1964
	if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
1965 1966 1967 1968
		err = -EOPNOTSUPP;
		goto done;
	}

1969 1970 1971 1972 1973
	if (hdev->dev_type != HCI_BREDR) {
		err = -EOPNOTSUPP;
		goto done;
	}

1974
	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
1975 1976 1977 1978
		err = -EOPNOTSUPP;
		goto done;
	}

L
Linus Torvalds 已提交
1979 1980
	switch (cmd) {
	case HCISETAUTH:
1981 1982
		err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
				   HCI_INIT_TIMEOUT);
L
Linus Torvalds 已提交
1983 1984 1985 1986 1987 1988 1989 1990 1991 1992
		break;

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

		if (!test_bit(HCI_AUTH, &hdev->flags)) {
			/* Auth must be enabled first */
1993 1994
			err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
					   HCI_INIT_TIMEOUT);
L
Linus Torvalds 已提交
1995 1996 1997 1998
			if (err)
				break;
		}

1999 2000
		err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
				   HCI_INIT_TIMEOUT);
L
Linus Torvalds 已提交
2001 2002 2003
		break;

	case HCISETSCAN:
2004 2005
		err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
				   HCI_INIT_TIMEOUT);
2006

2007 2008
		/* Ensure that the connectable and discoverable states
		 * get correctly modified as this was a non-mgmt change.
2009
		 */
2010 2011
		if (!err)
			hci_update_scan_state(hdev, dr.dev_opt);
L
Linus Torvalds 已提交
2012 2013 2014
		break;

	case HCISETLINKPOL:
2015 2016
		err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
				   HCI_INIT_TIMEOUT);
L
Linus Torvalds 已提交
2017 2018 2019
		break;

	case HCISETLINKMODE:
2020 2021 2022 2023 2024 2025
		hdev->link_mode = ((__u16) dr.dev_opt) &
					(HCI_LM_MASTER | HCI_LM_ACCEPT);
		break;

	case HCISETPTYPE:
		hdev->pkt_type = (__u16) dr.dev_opt;
L
Linus Torvalds 已提交
2026 2027 2028
		break;

	case HCISETACLMTU:
2029 2030
		hdev->acl_mtu  = *((__u16 *) &dr.dev_opt + 1);
		hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
L
Linus Torvalds 已提交
2031 2032 2033
		break;

	case HCISETSCOMTU:
2034 2035
		hdev->sco_mtu  = *((__u16 *) &dr.dev_opt + 1);
		hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
L
Linus Torvalds 已提交
2036 2037 2038 2039 2040 2041
		break;

	default:
		err = -EINVAL;
		break;
	}
2042

2043
done:
L
Linus Torvalds 已提交
2044 2045 2046 2047 2048 2049
	hci_dev_put(hdev);
	return err;
}

int hci_get_dev_list(void __user *arg)
{
2050
	struct hci_dev *hdev;
L
Linus Torvalds 已提交
2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063
	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);

A
Andrei Emeltchenko 已提交
2064 2065
	dl = kzalloc(size, GFP_KERNEL);
	if (!dl)
L
Linus Torvalds 已提交
2066 2067 2068 2069
		return -ENOMEM;

	dr = dl->dev_req;

2070
	read_lock(&hci_dev_list_lock);
2071
	list_for_each_entry(hdev, &hci_dev_list, list) {
2072
		unsigned long flags = hdev->flags;
2073

2074 2075 2076 2077
		/* When the auto-off is configured it means the transport
		 * is running, but in that case still indicate that the
		 * device is actually down.
		 */
2078
		if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2079
			flags &= ~BIT(HCI_UP);
2080

L
Linus Torvalds 已提交
2081
		(dr + n)->dev_id  = hdev->id;
2082
		(dr + n)->dev_opt = flags;
2083

L
Linus Torvalds 已提交
2084 2085 2086
		if (++n >= dev_num)
			break;
	}
2087
	read_unlock(&hci_dev_list_lock);
L
Linus Torvalds 已提交
2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101

	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;
2102
	unsigned long flags;
L
Linus Torvalds 已提交
2103 2104 2105 2106 2107
	int err = 0;

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

A
Andrei Emeltchenko 已提交
2108 2109
	hdev = hci_dev_get(di.dev_id);
	if (!hdev)
L
Linus Torvalds 已提交
2110 2111
		return -ENODEV;

2112 2113 2114 2115
	/* When the auto-off is configured it means the transport
	 * is running, but in that case still indicate that the
	 * device is actually down.
	 */
2116
	if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
2117 2118 2119
		flags = hdev->flags & ~BIT(HCI_UP);
	else
		flags = hdev->flags;
2120

L
Linus Torvalds 已提交
2121 2122
	strcpy(di.name, hdev->name);
	di.bdaddr   = hdev->bdaddr;
2123
	di.type     = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
2124
	di.flags    = flags;
L
Linus Torvalds 已提交
2125
	di.pkt_type = hdev->pkt_type;
2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136
	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
2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152
	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 ---- */

2153 2154 2155 2156 2157 2158
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);

2159
	if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2160 2161
		return -EBUSY;

2162
	if (blocked) {
2163
		hci_dev_set_flag(hdev, HCI_RFKILLED);
2164 2165
		if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
		    !hci_dev_test_flag(hdev, HCI_CONFIG))
2166
			hci_dev_do_close(hdev);
2167
	} else {
2168
		hci_dev_clear_flag(hdev, HCI_RFKILLED);
2169
	}
2170 2171 2172 2173 2174 2175 2176 2177

	return 0;
}

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

2178 2179 2180
static void hci_power_on(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
2181
	int err;
2182 2183 2184

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

2185
	err = hci_dev_do_open(hdev);
2186
	if (err < 0) {
2187
		hci_dev_lock(hdev);
2188
		mgmt_set_powered_failed(hdev, err);
2189
		hci_dev_unlock(hdev);
2190
		return;
2191
	}
2192

2193 2194 2195 2196
	/* 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.
	 */
2197 2198
	if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
	    hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
2199 2200 2201
	    (hdev->dev_type == HCI_BREDR &&
	     !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
	     !bacmp(&hdev->static_addr, BDADDR_ANY))) {
2202
		hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
2203
		hci_dev_do_close(hdev);
2204
	} else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
2205 2206
		queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
				   HCI_AUTO_OFF_TIMEOUT);
2207
	}
2208

2209
	if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
2210 2211 2212
		/* For unconfigured devices, set the HCI_RAW flag
		 * so that userspace can easily identify them.
		 */
2213
		if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2214
			set_bit(HCI_RAW, &hdev->flags);
2215 2216 2217 2218 2219 2220 2221 2222 2223

		/* 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);
2224
	} else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
2225 2226 2227
		/* When the controller is now configured, then it
		 * is important to clear the HCI_RAW flag.
		 */
2228
		if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
2229 2230
			clear_bit(HCI_RAW, &hdev->flags);

2231 2232 2233 2234
		/* Powering on the controller with HCI_CONFIG set only
		 * happens with the transition from unconfigured to
		 * configured. This will send the Index Added event.
		 */
2235
		mgmt_index_added(hdev);
2236
	}
2237 2238 2239 2240
}

static void hci_power_off(struct work_struct *work)
{
2241
	struct hci_dev *hdev = container_of(work, struct hci_dev,
2242
					    power_off.work);
2243 2244 2245

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

2246
	hci_dev_do_close(hdev);
2247 2248
}

2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266
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
		BT_ERR("%s hardware error 0x%2.2x", hdev->name,
		       hdev->hw_error_code);

	if (hci_dev_do_close(hdev))
		return;

	hci_dev_do_open(hdev);
}

2267 2268 2269 2270 2271 2272 2273 2274
static void hci_discov_off(struct work_struct *work)
{
	struct hci_dev *hdev;

	hdev = container_of(work, struct hci_dev, discov_off.work);

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

2275
	mgmt_discoverable_timeout(hdev);
2276 2277
}

2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288
static void hci_adv_timeout_expire(struct work_struct *work)
{
	struct hci_dev *hdev;

	hdev = container_of(work, struct hci_dev, adv_instance_expire.work);

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

	mgmt_adv_timeout_expired(hdev);
}

2289
void hci_uuids_clear(struct hci_dev *hdev)
2290
{
2291
	struct bt_uuid *uuid, *tmp;
2292

2293 2294
	list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
		list_del(&uuid->list);
2295 2296 2297 2298
		kfree(uuid);
	}
}

2299
void hci_link_keys_clear(struct hci_dev *hdev)
2300
{
2301
	struct link_key *key;
2302

2303 2304 2305
	list_for_each_entry_rcu(key, &hdev->link_keys, list) {
		list_del_rcu(&key->list);
		kfree_rcu(key, rcu);
2306 2307 2308
	}
}

2309
void hci_smp_ltks_clear(struct hci_dev *hdev)
2310
{
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2311
	struct smp_ltk *k;
2312

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2313 2314 2315
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2316 2317 2318
	}
}

2319 2320
void hci_smp_irks_clear(struct hci_dev *hdev)
{
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2321
	struct smp_irk *k;
2322

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2323 2324 2325
	list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2326 2327 2328
	}
}

2329 2330
struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
2331
	struct link_key *k;
2332

2333 2334 2335 2336
	rcu_read_lock();
	list_for_each_entry_rcu(k, &hdev->link_keys, list) {
		if (bacmp(bdaddr, &k->bdaddr) == 0) {
			rcu_read_unlock();
2337
			return k;
2338 2339 2340
		}
	}
	rcu_read_unlock();
2341 2342 2343 2344

	return NULL;
}

2345
static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
2346
			       u8 key_type, u8 old_key_type)
2347 2348 2349
{
	/* Legacy key */
	if (key_type < 0x03)
2350
		return true;
2351 2352 2353

	/* Debug keys are insecure so don't store them persistently */
	if (key_type == HCI_LK_DEBUG_COMBINATION)
2354
		return false;
2355 2356 2357

	/* Changed combination key and there's no previous one */
	if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
2358
		return false;
2359 2360 2361

	/* Security mode 3 case */
	if (!conn)
2362
		return true;
2363

2364 2365 2366 2367
	/* BR/EDR key derived using SC from an LE link */
	if (conn->type == LE_LINK)
		return true;

2368 2369
	/* Neither local nor remote side had no-bonding as requirement */
	if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
2370
		return true;
2371 2372 2373

	/* Local side had dedicated bonding as requirement */
	if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
2374
		return true;
2375 2376 2377

	/* Remote side had dedicated bonding as requirement */
	if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
2378
		return true;
2379 2380 2381

	/* If none of the above criteria match, then don't store the key
	 * persistently */
2382
	return false;
2383 2384
}

2385
static u8 ltk_role(u8 type)
2386
{
2387 2388
	if (type == SMP_LTK)
		return HCI_ROLE_MASTER;
2389

2390
	return HCI_ROLE_SLAVE;
2391 2392
}

2393 2394
struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
			     u8 addr_type, u8 role)
2395
{
2396
	struct smp_ltk *k;
2397

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2398 2399
	rcu_read_lock();
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2400 2401 2402
		if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
			continue;

2403
		if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
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2404
			rcu_read_unlock();
2405
			return k;
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2406 2407 2408
		}
	}
	rcu_read_unlock();
2409 2410 2411 2412

	return NULL;
}

2413 2414 2415 2416
struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
{
	struct smp_irk *irk;

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2417 2418 2419 2420
	rcu_read_lock();
	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
		if (!bacmp(&irk->rpa, rpa)) {
			rcu_read_unlock();
2421
			return irk;
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2422
		}
2423 2424
	}

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2425
	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2426
		if (smp_irk_matches(hdev, irk->val, rpa)) {
2427
			bacpy(&irk->rpa, rpa);
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2428
			rcu_read_unlock();
2429 2430 2431
			return irk;
		}
	}
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2432
	rcu_read_unlock();
2433 2434 2435 2436 2437 2438 2439 2440 2441

	return NULL;
}

struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
				     u8 addr_type)
{
	struct smp_irk *irk;

2442 2443 2444 2445
	/* Identity Address must be public or static random */
	if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
		return NULL;

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2446 2447
	rcu_read_lock();
	list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
2448
		if (addr_type == irk->addr_type &&
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Johan Hedberg 已提交
2449 2450
		    bacmp(bdaddr, &irk->bdaddr) == 0) {
			rcu_read_unlock();
2451
			return irk;
J
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2452
		}
2453
	}
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2454
	rcu_read_unlock();
2455 2456 2457 2458

	return NULL;
}

2459
struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
2460 2461
				  bdaddr_t *bdaddr, u8 *val, u8 type,
				  u8 pin_len, bool *persistent)
2462 2463
{
	struct link_key *key, *old_key;
2464
	u8 old_key_type;
2465 2466 2467 2468 2469 2470

	old_key = hci_find_link_key(hdev, bdaddr);
	if (old_key) {
		old_key_type = old_key->type;
		key = old_key;
	} else {
2471
		old_key_type = conn ? conn->key_type : 0xff;
2472
		key = kzalloc(sizeof(*key), GFP_KERNEL);
2473
		if (!key)
2474
			return NULL;
2475
		list_add_rcu(&key->list, &hdev->link_keys);
2476 2477
	}

2478
	BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
2479

2480 2481 2482 2483
	/* 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 &&
2484
	    (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
2485
		type = HCI_LK_COMBINATION;
2486 2487 2488
		if (conn)
			conn->key_type = type;
	}
2489

2490
	bacpy(&key->bdaddr, bdaddr);
2491
	memcpy(key->val, val, HCI_LINK_KEY_SIZE);
2492 2493
	key->pin_len = pin_len;

2494
	if (type == HCI_LK_CHANGED_COMBINATION)
2495
		key->type = old_key_type;
2496 2497 2498
	else
		key->type = type;

2499 2500 2501
	if (persistent)
		*persistent = hci_persistent_key(hdev, conn, type,
						 old_key_type);
2502

2503
	return key;
2504 2505
}

2506
struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
2507
			    u8 addr_type, u8 type, u8 authenticated,
2508
			    u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
2509
{
2510
	struct smp_ltk *key, *old_key;
2511
	u8 role = ltk_role(type);
2512

2513
	old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
2514
	if (old_key)
2515
		key = old_key;
2516
	else {
2517
		key = kzalloc(sizeof(*key), GFP_KERNEL);
2518
		if (!key)
2519
			return NULL;
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Johan Hedberg 已提交
2520
		list_add_rcu(&key->list, &hdev->long_term_keys);
2521 2522 2523
	}

	bacpy(&key->bdaddr, bdaddr);
2524 2525 2526 2527
	key->bdaddr_type = addr_type;
	memcpy(key->val, tk, sizeof(key->val));
	key->authenticated = authenticated;
	key->ediv = ediv;
2528
	key->rand = rand;
2529 2530
	key->enc_size = enc_size;
	key->type = type;
2531

2532
	return key;
2533 2534
}

2535 2536
struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
			    u8 addr_type, u8 val[16], bdaddr_t *rpa)
2537 2538 2539 2540 2541 2542 2543
{
	struct smp_irk *irk;

	irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
	if (!irk) {
		irk = kzalloc(sizeof(*irk), GFP_KERNEL);
		if (!irk)
2544
			return NULL;
2545 2546 2547 2548

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

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2549
		list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
2550 2551 2552 2553 2554
	}

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

2555
	return irk;
2556 2557
}

2558 2559 2560 2561 2562 2563 2564 2565
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;

2566
	BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2567

2568 2569
	list_del_rcu(&key->list);
	kfree_rcu(key, rcu);
2570 2571 2572 2573

	return 0;
}

2574
int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
2575
{
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Johan Hedberg 已提交
2576
	struct smp_ltk *k;
2577
	int removed = 0;
2578

J
Johan Hedberg 已提交
2579
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2580
		if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
2581 2582
			continue;

2583
		BT_DBG("%s removing %pMR", hdev->name, bdaddr);
2584

J
Johan Hedberg 已提交
2585 2586
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2587
		removed++;
2588 2589
	}

2590
	return removed ? 0 : -ENOENT;
2591 2592
}

2593 2594
void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
{
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Johan Hedberg 已提交
2595
	struct smp_irk *k;
2596

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Johan Hedberg 已提交
2597
	list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
2598 2599 2600 2601 2602
		if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
			continue;

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

J
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2603 2604
		list_del_rcu(&k->list);
		kfree_rcu(k, rcu);
2605 2606 2607
	}
}

2608 2609 2610
bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
{
	struct smp_ltk *k;
2611
	struct smp_irk *irk;
2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625
	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;

2626 2627 2628 2629 2630 2631
	irk = hci_get_irk(hdev, bdaddr, addr_type);
	if (irk) {
		bdaddr = &irk->bdaddr;
		addr_type = irk->addr_type;
	}

2632 2633
	rcu_read_lock();
	list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
2634 2635
		if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
			rcu_read_unlock();
2636
			return true;
2637
		}
2638 2639 2640 2641 2642 2643
	}
	rcu_read_unlock();

	return false;
}

2644
/* HCI command timer function */
2645
static void hci_cmd_timeout(struct work_struct *work)
2646
{
2647 2648
	struct hci_dev *hdev = container_of(work, struct hci_dev,
					    cmd_timer.work);
2649

2650 2651 2652 2653 2654 2655 2656 2657 2658
	if (hdev->sent_cmd) {
		struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
		u16 opcode = __le16_to_cpu(sent->opcode);

		BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
	} else {
		BT_ERR("%s command tx timeout", hdev->name);
	}

2659
	atomic_set(&hdev->cmd_cnt, 1);
2660
	queue_work(hdev->workqueue, &hdev->cmd_work);
2661 2662
}

2663
struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
2664
					  bdaddr_t *bdaddr, u8 bdaddr_type)
2665 2666 2667
{
	struct oob_data *data;

2668 2669 2670 2671 2672 2673 2674
	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;
	}
2675 2676 2677 2678

	return NULL;
}

2679 2680
int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
			       u8 bdaddr_type)
2681 2682 2683
{
	struct oob_data *data;

2684
	data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2685 2686 2687
	if (!data)
		return -ENOENT;

2688
	BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
2689 2690 2691 2692 2693 2694 2695

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

	return 0;
}

2696
void hci_remote_oob_data_clear(struct hci_dev *hdev)
2697 2698 2699 2700 2701 2702 2703 2704 2705
{
	struct oob_data *data, *n;

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

2706
int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
2707
			    u8 bdaddr_type, u8 *hash192, u8 *rand192,
2708
			    u8 *hash256, u8 *rand256)
2709 2710 2711
{
	struct oob_data *data;

2712
	data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
2713
	if (!data) {
2714
		data = kmalloc(sizeof(*data), GFP_KERNEL);
2715 2716 2717 2718
		if (!data)
			return -ENOMEM;

		bacpy(&data->bdaddr, bdaddr);
2719
		data->bdaddr_type = bdaddr_type;
2720 2721 2722
		list_add(&data->list, &hdev->remote_oob_data);
	}

2723 2724 2725
	if (hash192 && rand192) {
		memcpy(data->hash192, hash192, sizeof(data->hash192));
		memcpy(data->rand192, rand192, sizeof(data->rand192));
2726 2727
		if (hash256 && rand256)
			data->present = 0x03;
2728 2729 2730
	} else {
		memset(data->hash192, 0, sizeof(data->hash192));
		memset(data->rand192, 0, sizeof(data->rand192));
2731 2732 2733 2734
		if (hash256 && rand256)
			data->present = 0x02;
		else
			data->present = 0x00;
2735 2736
	}

2737 2738 2739 2740 2741 2742
	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));
2743 2744
		if (hash192 && rand192)
			data->present = 0x01;
2745
	}
2746

2747
	BT_DBG("%s for %pMR", hdev->name, bdaddr);
2748 2749 2750 2751

	return 0;
}

2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791
/* 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 */
struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance) {
	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);

2792 2793 2794 2795 2796
	if (hdev->cur_adv_instance == instance && hdev->adv_instance_timeout) {
		cancel_delayed_work(&hdev->adv_instance_expire);
		hdev->adv_instance_timeout = 0;
	}

2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809
	list_del(&adv_instance->list);
	kfree(adv_instance);

	hdev->adv_instance_cnt--;

	return 0;
}

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

2810 2811 2812 2813 2814
	if (hdev->adv_instance_timeout) {
		cancel_delayed_work(&hdev->adv_instance_expire);
		hdev->adv_instance_timeout = 0;
	}

2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841
	list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
		list_del(&adv_instance->list);
		kfree(adv_instance);
	}

	hdev->adv_instance_cnt = 0;
}

/* 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 {
		if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
		    instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
			return -EOVERFLOW;

2842
		adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
2843 2844 2845
		if (!adv_instance)
			return -ENOMEM;

2846
		adv_instance->pending = true;
2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863
		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;
2864
	adv_instance->remaining_time = timeout;
2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875

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

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

	return 0;
}

2876
struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2877
					 bdaddr_t *bdaddr, u8 type)
2878
{
2879
	struct bdaddr_list *b;
2880

2881
	list_for_each_entry(b, bdaddr_list, list) {
2882
		if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2883
			return b;
2884
	}
2885 2886 2887 2888

	return NULL;
}

2889
void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2890 2891 2892
{
	struct list_head *p, *n;

2893
	list_for_each_safe(p, n, bdaddr_list) {
2894
		struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
2895 2896 2897 2898 2899 2900

		list_del(p);
		kfree(b);
	}
}

2901
int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2902 2903 2904
{
	struct bdaddr_list *entry;

2905
	if (!bacmp(bdaddr, BDADDR_ANY))
2906 2907
		return -EBADF;

2908
	if (hci_bdaddr_list_lookup(list, bdaddr, type))
2909
		return -EEXIST;
2910

2911
	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2912 2913
	if (!entry)
		return -ENOMEM;
2914 2915

	bacpy(&entry->bdaddr, bdaddr);
2916
	entry->bdaddr_type = type;
2917

2918
	list_add(&entry->list, list);
2919

2920
	return 0;
2921 2922
}

2923
int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2924 2925 2926
{
	struct bdaddr_list *entry;

2927
	if (!bacmp(bdaddr, BDADDR_ANY)) {
2928
		hci_bdaddr_list_clear(list);
2929 2930
		return 0;
	}
2931

2932
	entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2933 2934 2935 2936 2937 2938 2939 2940 2941
	if (!entry)
		return -ENOENT;

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

	return 0;
}

2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957
/* 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;
}

2958
/* This function requires the caller holds hdev->lock */
2959 2960
struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
						  bdaddr_t *addr, u8 addr_type)
2961
{
2962
	struct hci_conn_params *param;
2963

2964
	list_for_each_entry(param, list, action) {
2965 2966 2967
		if (bacmp(&param->addr, addr) == 0 &&
		    param->addr_type == addr_type)
			return param;
2968 2969 2970
	}

	return NULL;
2971 2972
}

2973
/* This function requires the caller holds hdev->lock */
2974 2975
struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
					    bdaddr_t *addr, u8 addr_type)
2976 2977 2978 2979
{
	struct hci_conn_params *params;

	params = hci_conn_params_lookup(hdev, addr, addr_type);
2980
	if (params)
2981
		return params;
2982 2983 2984 2985

	params = kzalloc(sizeof(*params), GFP_KERNEL);
	if (!params) {
		BT_ERR("Out of memory");
2986
		return NULL;
2987 2988 2989 2990
	}

	bacpy(&params->addr, addr);
	params->addr_type = addr_type;
2991 2992

	list_add(&params->list, &hdev->le_conn_params);
2993
	INIT_LIST_HEAD(&params->action);
2994

2995 2996 2997 2998 2999 3000 3001 3002
	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);

3003
	return params;
3004 3005
}

3006
static void hci_conn_params_free(struct hci_conn_params *params)
3007
{
3008
	if (params->conn) {
3009
		hci_conn_drop(params->conn);
3010 3011
		hci_conn_put(params->conn);
	}
3012

3013
	list_del(&params->action);
3014 3015
	list_del(&params->list);
	kfree(params);
3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027
}

/* 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);
3028

3029 3030
	hci_update_background_scan(hdev);

3031 3032 3033 3034
	BT_DBG("addr %pMR (type %u)", addr, addr_type);
}

/* This function requires the caller holds hdev->lock */
3035
void hci_conn_params_clear_disabled(struct hci_dev *hdev)
3036 3037 3038 3039
{
	struct hci_conn_params *params, *tmp;

	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
3040 3041
		if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
			continue;
3042 3043 3044 3045 3046 3047 3048 3049 3050

		/* 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;
		}

3051 3052 3053 3054
		list_del(&params->list);
		kfree(params);
	}

3055
	BT_DBG("All LE disabled connection parameters were removed");
3056 3057 3058
}

/* This function requires the caller holds hdev->lock */
3059
void hci_conn_params_clear_all(struct hci_dev *hdev)
3060
{
3061
	struct hci_conn_params *params, *tmp;
3062

3063 3064
	list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
		hci_conn_params_free(params);
3065

3066
	hci_update_background_scan(hdev);
3067

3068
	BT_DBG("All LE connection parameters were removed");
3069 3070
}

3071
static void inquiry_complete(struct hci_dev *hdev, u8 status, u16 opcode)
A
Andre Guedes 已提交
3072
{
3073 3074
	if (status) {
		BT_ERR("Failed to start inquiry: status %d", status);
A
Andre Guedes 已提交
3075

3076 3077 3078 3079 3080
		hci_dev_lock(hdev);
		hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
		hci_dev_unlock(hdev);
		return;
	}
A
Andre Guedes 已提交
3081 3082
}

3083 3084
static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
					  u16 opcode)
A
Andre Guedes 已提交
3085
{
3086 3087 3088
	/* General inquiry access code (GIAC) */
	u8 lap[3] = { 0x33, 0x8b, 0x9e };
	struct hci_cp_inquiry cp;
A
Andre Guedes 已提交
3089 3090
	int err;

3091 3092 3093 3094
	if (status) {
		BT_ERR("Failed to disable LE scanning: status %d", status);
		return;
	}
A
Andre Guedes 已提交
3095

3096 3097
	hdev->discovery.scan_start = 0;

3098 3099 3100 3101 3102 3103
	switch (hdev->discovery.type) {
	case DISCOV_TYPE_LE:
		hci_dev_lock(hdev);
		hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
		hci_dev_unlock(hdev);
		break;
A
Andre Guedes 已提交
3104

3105 3106
	case DISCOV_TYPE_INTERLEAVED:
		hci_dev_lock(hdev);
3107

3108 3109 3110 3111 3112 3113
		if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
			     &hdev->quirks)) {
			/* If we were running LE only scan, change discovery
			 * state. If we were running both LE and BR/EDR inquiry
			 * simultaneously, and BR/EDR inquiry is already
			 * finished, stop discovery, otherwise BR/EDR inquiry
3114 3115
			 * will stop discovery when finished. If we will resolve
			 * remote device name, do not change discovery state.
3116
			 */
3117 3118
			if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
			    hdev->discovery.state != DISCOVERY_RESOLVING)
3119 3120 3121
				hci_discovery_set_state(hdev,
							DISCOVERY_STOPPED);
		} else {
3122 3123
			struct hci_request req;

3124 3125
			hci_inquiry_cache_flush(hdev);

3126 3127 3128 3129 3130 3131 3132
			hci_req_init(&req, hdev);

			memset(&cp, 0, sizeof(cp));
			memcpy(&cp.lap, lap, sizeof(cp.lap));
			cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
			hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);

3133 3134 3135 3136 3137 3138
			err = hci_req_run(&req, inquiry_complete);
			if (err) {
				BT_ERR("Inquiry request failed: err %d", err);
				hci_discovery_set_state(hdev,
							DISCOVERY_STOPPED);
			}
3139
		}
3140

3141 3142
		hci_dev_unlock(hdev);
		break;
3143 3144 3145
	}
}

A
Andre Guedes 已提交
3146 3147 3148
static void le_scan_disable_work(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev,
3149
					    le_scan_disable.work);
3150 3151
	struct hci_request req;
	int err;
A
Andre Guedes 已提交
3152 3153 3154

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

3155 3156
	cancel_delayed_work_sync(&hdev->le_scan_restart);

3157
	hci_req_init(&req, hdev);
A
Andre Guedes 已提交
3158

3159
	hci_req_add_le_scan_disable(&req);
A
Andre Guedes 已提交
3160

3161 3162 3163
	err = hci_req_run(&req, le_scan_disable_work_complete);
	if (err)
		BT_ERR("Disable LE scanning request failed: err %d", err);
A
Andre Guedes 已提交
3164 3165
}

3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216
static void le_scan_restart_work_complete(struct hci_dev *hdev, u8 status,
					  u16 opcode)
{
	unsigned long timeout, duration, scan_start, now;

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

	if (status) {
		BT_ERR("Failed to restart LE scan: status %d", status);
		return;
	}

	if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
	    !hdev->discovery.scan_start)
		return;

	/* When the scan was started, hdev->le_scan_disable has been queued
	 * after duration from scan_start. During scan restart this job
	 * has been canceled, and we need to queue it again after proper
	 * timeout, to make sure that scan does not run indefinitely.
	 */
	duration = hdev->discovery.scan_duration;
	scan_start = hdev->discovery.scan_start;
	now = jiffies;
	if (now - scan_start <= duration) {
		int elapsed;

		if (now >= scan_start)
			elapsed = now - scan_start;
		else
			elapsed = ULONG_MAX - scan_start + now;

		timeout = duration - elapsed;
	} else {
		timeout = 0;
	}
	queue_delayed_work(hdev->workqueue,
			   &hdev->le_scan_disable, timeout);
}

static void le_scan_restart_work(struct work_struct *work)
{
	struct hci_dev *hdev = container_of(work, struct hci_dev,
					    le_scan_restart.work);
	struct hci_request req;
	struct hci_cp_le_set_scan_enable cp;
	int err;

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

	/* If controller is not scanning we are done. */
3217
	if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233
		return;

	hci_req_init(&req, hdev);

	hci_req_add_le_scan_disable(&req);

	memset(&cp, 0, sizeof(cp));
	cp.enable = LE_SCAN_ENABLE;
	cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
	hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);

	err = hci_req_run(&req, le_scan_restart_work_complete);
	if (err)
		BT_ERR("Restart LE scan request failed: err %d", err);
}

3234 3235 3236 3237 3238 3239 3240 3241
/* 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.
3242 3243 3244 3245
 *
 * 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.
3246 3247 3248 3249
 */
void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
			       u8 *bdaddr_type)
{
3250
	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
3251
	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
3252
	    (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
3253
	     bacmp(&hdev->static_addr, BDADDR_ANY))) {
3254 3255 3256 3257 3258 3259 3260 3261
		bacpy(bdaddr, &hdev->static_addr);
		*bdaddr_type = ADDR_LE_DEV_RANDOM;
	} else {
		bacpy(bdaddr, &hdev->bdaddr);
		*bdaddr_type = ADDR_LE_DEV_PUBLIC;
	}
}

3262 3263 3264 3265 3266
/* Alloc HCI device */
struct hci_dev *hci_alloc_dev(void)
{
	struct hci_dev *hdev;

3267
	hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
3268 3269 3270
	if (!hdev)
		return NULL;

3271 3272 3273
	hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
	hdev->esco_type = (ESCO_HV1);
	hdev->link_mode = (HCI_LM_ACCEPT);
3274 3275
	hdev->num_iac = 0x01;		/* One IAC support is mandatory */
	hdev->io_capability = 0x03;	/* No Input No Output */
3276
	hdev->manufacturer = 0xffff;	/* Default to internal use */
3277 3278
	hdev->inq_tx_power = HCI_TX_POWER_INVALID;
	hdev->adv_tx_power = HCI_TX_POWER_INVALID;
3279 3280
	hdev->adv_instance_cnt = 0;
	hdev->cur_adv_instance = 0x00;
3281
	hdev->adv_instance_timeout = 0;
3282 3283 3284 3285

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

3286
	hdev->le_adv_channel_map = 0x07;
3287 3288
	hdev->le_adv_min_interval = 0x0800;
	hdev->le_adv_max_interval = 0x0800;
3289 3290
	hdev->le_scan_interval = 0x0060;
	hdev->le_scan_window = 0x0030;
3291 3292
	hdev->le_conn_min_interval = 0x0028;
	hdev->le_conn_max_interval = 0x0038;
3293 3294
	hdev->le_conn_latency = 0x0000;
	hdev->le_supv_timeout = 0x002a;
3295 3296 3297 3298 3299 3300
	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;
3301

3302
	hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
3303
	hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
3304 3305
	hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
	hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
3306

3307 3308 3309 3310 3311
	mutex_init(&hdev->lock);
	mutex_init(&hdev->req_lock);

	INIT_LIST_HEAD(&hdev->mgmt_pending);
	INIT_LIST_HEAD(&hdev->blacklist);
3312
	INIT_LIST_HEAD(&hdev->whitelist);
3313 3314 3315
	INIT_LIST_HEAD(&hdev->uuids);
	INIT_LIST_HEAD(&hdev->link_keys);
	INIT_LIST_HEAD(&hdev->long_term_keys);
3316
	INIT_LIST_HEAD(&hdev->identity_resolving_keys);
3317
	INIT_LIST_HEAD(&hdev->remote_oob_data);
3318
	INIT_LIST_HEAD(&hdev->le_white_list);
3319
	INIT_LIST_HEAD(&hdev->le_conn_params);
3320
	INIT_LIST_HEAD(&hdev->pend_le_conns);
3321
	INIT_LIST_HEAD(&hdev->pend_le_reports);
3322
	INIT_LIST_HEAD(&hdev->conn_hash.list);
3323
	INIT_LIST_HEAD(&hdev->adv_instances);
3324 3325 3326 3327 3328

	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);
3329
	INIT_WORK(&hdev->error_reset, hci_error_reset);
3330 3331 3332 3333

	INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
	INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
	INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
3334
	INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
3335
	INIT_DELAYED_WORK(&hdev->adv_instance_expire, hci_adv_timeout_expire);
3336 3337 3338 3339 3340 3341 3342

	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);

3343
	INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
3344 3345 3346

	hci_init_sysfs(hdev);
	discovery_init(hdev);
3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359

	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
3360 3361 3362
/* Register HCI device */
int hci_register_dev(struct hci_dev *hdev)
{
3363
	int id, error;
L
Linus Torvalds 已提交
3364

3365
	if (!hdev->open || !hdev->close || !hdev->send)
L
Linus Torvalds 已提交
3366 3367
		return -EINVAL;

3368 3369 3370
	/* Do not allow HCI_AMP devices to register at index 0,
	 * so the index can be used as the AMP controller ID.
	 */
3371 3372 3373 3374 3375 3376 3377 3378 3379
	switch (hdev->dev_type) {
	case HCI_BREDR:
		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
3380
	}
3381

3382 3383 3384
	if (id < 0)
		return id;

L
Linus Torvalds 已提交
3385 3386
	sprintf(hdev->name, "hci%d", id);
	hdev->id = id;
3387 3388 3389

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

3390 3391
	hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
					  WQ_MEM_RECLAIM, 1, hdev->name);
3392 3393 3394 3395
	if (!hdev->workqueue) {
		error = -ENOMEM;
		goto err;
	}
3396

3397 3398
	hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
					      WQ_MEM_RECLAIM, 1, hdev->name);
3399 3400 3401 3402 3403 3404
	if (!hdev->req_workqueue) {
		destroy_workqueue(hdev->workqueue);
		error = -ENOMEM;
		goto err;
	}

3405 3406 3407
	if (!IS_ERR_OR_NULL(bt_debugfs))
		hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);

3408 3409 3410
	dev_set_name(&hdev->dev, "%s", hdev->name);

	error = device_add(&hdev->dev);
3411
	if (error < 0)
3412
		goto err_wqueue;
L
Linus Torvalds 已提交
3413

3414
	hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
3415 3416
				    RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
				    hdev);
3417 3418 3419 3420 3421 3422 3423
	if (hdev->rfkill) {
		if (rfkill_register(hdev->rfkill) < 0) {
			rfkill_destroy(hdev->rfkill);
			hdev->rfkill = NULL;
		}
	}

3424
	if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
3425
		hci_dev_set_flag(hdev, HCI_RFKILLED);
3426

3427 3428
	hci_dev_set_flag(hdev, HCI_SETUP);
	hci_dev_set_flag(hdev, HCI_AUTO_OFF);
3429

3430
	if (hdev->dev_type == HCI_BREDR) {
3431 3432 3433
		/* Assume BR/EDR support until proven otherwise (such as
		 * through reading supported features during init.
		 */
3434
		hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
3435
	}
3436

3437 3438 3439 3440
	write_lock(&hci_dev_list_lock);
	list_add(&hdev->list, &hci_dev_list);
	write_unlock(&hci_dev_list_lock);

3441 3442
	/* Devices that are marked for raw-only usage are unconfigured
	 * and should not be included in normal operation.
3443 3444
	 */
	if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
3445
		hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
3446

3447
	hci_sock_dev_event(hdev, HCI_DEV_REG);
3448
	hci_dev_hold(hdev);
L
Linus Torvalds 已提交
3449

3450
	queue_work(hdev->req_workqueue, &hdev->power_on);
3451

L
Linus Torvalds 已提交
3452
	return id;
3453

3454 3455
err_wqueue:
	destroy_workqueue(hdev->workqueue);
3456
	destroy_workqueue(hdev->req_workqueue);
3457
err:
3458
	ida_simple_remove(&hci_index_ida, hdev->id);
3459

3460
	return error;
L
Linus Torvalds 已提交
3461 3462 3463 3464
}
EXPORT_SYMBOL(hci_register_dev);

/* Unregister HCI device */
3465
void hci_unregister_dev(struct hci_dev *hdev)
L
Linus Torvalds 已提交
3466
{
3467
	int id;
3468

3469
	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
L
Linus Torvalds 已提交
3470

3471
	hci_dev_set_flag(hdev, HCI_UNREGISTER);
3472

3473 3474
	id = hdev->id;

3475
	write_lock(&hci_dev_list_lock);
L
Linus Torvalds 已提交
3476
	list_del(&hdev->list);
3477
	write_unlock(&hci_dev_list_lock);
L
Linus Torvalds 已提交
3478 3479 3480

	hci_dev_do_close(hdev);

3481 3482
	cancel_work_sync(&hdev->power_on);

3483
	if (!test_bit(HCI_INIT, &hdev->flags) &&
3484 3485
	    !hci_dev_test_flag(hdev, HCI_SETUP) &&
	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
3486
		hci_dev_lock(hdev);
3487
		mgmt_index_removed(hdev);
3488
		hci_dev_unlock(hdev);
3489
	}
3490

3491 3492 3493 3494
	/* mgmt_index_removed should take care of emptying the
	 * pending list */
	BUG_ON(!list_empty(&hdev->mgmt_pending));

3495
	hci_sock_dev_event(hdev, HCI_DEV_UNREG);
L
Linus Torvalds 已提交
3496

3497 3498 3499 3500 3501
	if (hdev->rfkill) {
		rfkill_unregister(hdev->rfkill);
		rfkill_destroy(hdev->rfkill);
	}

3502
	device_del(&hdev->dev);
3503

3504 3505
	debugfs_remove_recursive(hdev->debugfs);

3506
	destroy_workqueue(hdev->workqueue);
3507
	destroy_workqueue(hdev->req_workqueue);
3508

3509
	hci_dev_lock(hdev);
3510
	hci_bdaddr_list_clear(&hdev->blacklist);
3511
	hci_bdaddr_list_clear(&hdev->whitelist);
3512
	hci_uuids_clear(hdev);
3513
	hci_link_keys_clear(hdev);
3514
	hci_smp_ltks_clear(hdev);
3515
	hci_smp_irks_clear(hdev);
3516
	hci_remote_oob_data_clear(hdev);
3517
	hci_adv_instances_clear(hdev);
3518
	hci_bdaddr_list_clear(&hdev->le_white_list);
3519
	hci_conn_params_clear_all(hdev);
3520
	hci_discovery_filter_clear(hdev);
3521
	hci_dev_unlock(hdev);
3522

3523
	hci_dev_put(hdev);
3524 3525

	ida_simple_remove(&hci_index_ida, id);
L
Linus Torvalds 已提交
3526 3527 3528 3529 3530 3531
}
EXPORT_SYMBOL(hci_unregister_dev);

/* Suspend HCI device */
int hci_suspend_dev(struct hci_dev *hdev)
{
3532
	hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
L
Linus Torvalds 已提交
3533 3534 3535 3536 3537 3538 3539
	return 0;
}
EXPORT_SYMBOL(hci_suspend_dev);

/* Resume HCI device */
int hci_resume_dev(struct hci_dev *hdev)
{
3540
	hci_sock_dev_event(hdev, HCI_DEV_RESUME);
L
Linus Torvalds 已提交
3541 3542 3543 3544
	return 0;
}
EXPORT_SYMBOL(hci_resume_dev);

3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562
/* Reset HCI device */
int hci_reset_dev(struct hci_dev *hdev)
{
	const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
	struct sk_buff *skb;

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

	bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
	memcpy(skb_put(skb, 3), hw_err, 3);

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

3563
/* Receive frame from HCI drivers */
3564
int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
3565 3566
{
	if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
3567
		      && !test_bit(HCI_INIT, &hdev->flags))) {
3568 3569 3570 3571
		kfree_skb(skb);
		return -ENXIO;
	}

3572 3573 3574 3575 3576 3577 3578
	if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT &&
	    bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT &&
	    bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) {
		kfree_skb(skb);
		return -EINVAL;
	}

3579
	/* Incoming skb */
3580 3581 3582 3583 3584 3585
	bt_cb(skb)->incoming = 1;

	/* Time stamp */
	__net_timestamp(skb);

	skb_queue_tail(&hdev->rx_q, skb);
3586
	queue_work(hdev->workqueue, &hdev->rx_work);
3587

3588 3589 3590 3591
	return 0;
}
EXPORT_SYMBOL(hci_recv_frame);

3592 3593 3594
/* Receive diagnostic message from HCI drivers */
int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
{
3595 3596 3597
	/* Mark as diagnostic packet */
	bt_cb(skb)->pkt_type = HCI_DIAG_PKT;

3598 3599 3600
	/* Time stamp */
	__net_timestamp(skb);

3601 3602
	skb_queue_tail(&hdev->rx_q, skb);
	queue_work(hdev->workqueue, &hdev->rx_work);
3603 3604 3605 3606 3607

	return 0;
}
EXPORT_SYMBOL(hci_recv_diag);

L
Linus Torvalds 已提交
3608 3609 3610 3611 3612 3613
/* ---- Interface to upper protocols ---- */

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

3614
	mutex_lock(&hci_cb_list_lock);
3615
	list_add_tail(&cb->list, &hci_cb_list);
3616
	mutex_unlock(&hci_cb_list_lock);
L
Linus Torvalds 已提交
3617 3618 3619 3620 3621 3622 3623 3624 3625

	return 0;
}
EXPORT_SYMBOL(hci_register_cb);

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

3626
	mutex_lock(&hci_cb_list_lock);
L
Linus Torvalds 已提交
3627
	list_del(&cb->list);
3628
	mutex_unlock(&hci_cb_list_lock);
L
Linus Torvalds 已提交
3629 3630 3631 3632 3633

	return 0;
}
EXPORT_SYMBOL(hci_unregister_cb);

3634
static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
L
Linus Torvalds 已提交
3635
{
3636 3637
	int err;

3638
	BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
L
Linus Torvalds 已提交
3639

3640 3641
	/* Time stamp */
	__net_timestamp(skb);
L
Linus Torvalds 已提交
3642

3643 3644 3645 3646 3647
	/* Send copy to monitor */
	hci_send_to_monitor(hdev, skb);

	if (atomic_read(&hdev->promisc)) {
		/* Send copy to the sockets */
3648
		hci_send_to_sock(hdev, skb);
L
Linus Torvalds 已提交
3649 3650 3651 3652 3653
	}

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

3654 3655 3656 3657 3658
	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
		kfree_skb(skb);
		return;
	}

3659 3660 3661 3662 3663
	err = hdev->send(hdev, skb);
	if (err < 0) {
		BT_ERR("%s sending frame failed (%d)", hdev->name, err);
		kfree_skb(skb);
	}
L
Linus Torvalds 已提交
3664 3665
}

3666
/* Send HCI command */
3667 3668
int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
		 const void *param)
3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679
{
	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) {
		BT_ERR("%s no memory for command", hdev->name);
		return -ENOMEM;
	}

S
Stephen Hemminger 已提交
3680
	/* Stand-alone HCI commands must be flagged as
3681 3682
	 * single-command requests.
	 */
3683
	bt_cb(skb)->hci.req_start = true;
3684

L
Linus Torvalds 已提交
3685
	skb_queue_tail(&hdev->cmd_q, skb);
3686
	queue_work(hdev->workqueue, &hdev->cmd_work);
L
Linus Torvalds 已提交
3687 3688 3689 3690 3691

	return 0;
}

/* Get data from the previously sent command */
3692
void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
L
Linus Torvalds 已提交
3693 3694 3695 3696 3697 3698 3699 3700
{
	struct hci_command_hdr *hdr;

	if (!hdev->sent_cmd)
		return NULL;

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

3701
	if (hdr->opcode != cpu_to_le16(opcode))
L
Linus Torvalds 已提交
3702 3703
		return NULL;

3704
	BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
L
Linus Torvalds 已提交
3705 3706 3707 3708

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

3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727
/* 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);

	hci_req_lock(hdev);
	skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
	hci_req_unlock(hdev);

	return skb;
}
EXPORT_SYMBOL(hci_cmd_sync);

L
Linus Torvalds 已提交
3728 3729 3730 3731 3732 3733
/* 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;

3734 3735
	skb_push(skb, HCI_ACL_HDR_SIZE);
	skb_reset_transport_header(skb);
3736
	hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3737 3738
	hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
	hdr->dlen   = cpu_to_le16(len);
L
Linus Torvalds 已提交
3739 3740
}

3741
static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3742
			  struct sk_buff *skb, __u16 flags)
L
Linus Torvalds 已提交
3743
{
3744
	struct hci_conn *conn = chan->conn;
L
Linus Torvalds 已提交
3745 3746 3747
	struct hci_dev *hdev = conn->hdev;
	struct sk_buff *list;

3748 3749 3750 3751
	skb->len = skb_headlen(skb);
	skb->data_len = 0;

	bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763

	switch (hdev->dev_type) {
	case HCI_BREDR:
		hci_add_acl_hdr(skb, conn->handle, flags);
		break;
	case HCI_AMP:
		hci_add_acl_hdr(skb, chan->handle, flags);
		break;
	default:
		BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
		return;
	}
3764

A
Andrei Emeltchenko 已提交
3765 3766
	list = skb_shinfo(skb)->frag_list;
	if (!list) {
L
Linus Torvalds 已提交
3767 3768 3769
		/* Non fragmented */
		BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);

3770
		skb_queue_tail(queue, skb);
L
Linus Torvalds 已提交
3771 3772 3773 3774 3775 3776
	} else {
		/* Fragmented */
		BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);

		skb_shinfo(skb)->frag_list = NULL;

3777 3778 3779 3780 3781 3782
		/* 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
3783

3784
		__skb_queue_tail(queue, skb);
3785 3786 3787

		flags &= ~ACL_START;
		flags |= ACL_CONT;
L
Linus Torvalds 已提交
3788 3789
		do {
			skb = list; list = list->next;
3790

3791
			bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
3792
			hci_add_acl_hdr(skb, conn->handle, flags);
L
Linus Torvalds 已提交
3793 3794 3795

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

3796
			__skb_queue_tail(queue, skb);
L
Linus Torvalds 已提交
3797 3798
		} while (list);

3799
		spin_unlock_bh(&queue->lock);
L
Linus Torvalds 已提交
3800
	}
3801 3802 3803 3804
}

void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
{
3805
	struct hci_dev *hdev = chan->conn->hdev;
3806

3807
	BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3808

3809
	hci_queue_acl(chan, &chan->data_q, skb, flags);
L
Linus Torvalds 已提交
3810

3811
	queue_work(hdev->workqueue, &hdev->tx_work);
L
Linus Torvalds 已提交
3812 3813 3814
}

/* Send SCO data */
3815
void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
L
Linus Torvalds 已提交
3816 3817 3818 3819 3820 3821
{
	struct hci_dev *hdev = conn->hdev;
	struct hci_sco_hdr hdr;

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

3822
	hdr.handle = cpu_to_le16(conn->handle);
L
Linus Torvalds 已提交
3823 3824
	hdr.dlen   = skb->len;

3825 3826
	skb_push(skb, HCI_SCO_HDR_SIZE);
	skb_reset_transport_header(skb);
3827
	memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
L
Linus Torvalds 已提交
3828

3829
	bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
3830

L
Linus Torvalds 已提交
3831
	skb_queue_tail(&conn->data_q, skb);
3832
	queue_work(hdev->workqueue, &hdev->tx_work);
L
Linus Torvalds 已提交
3833 3834 3835 3836 3837
}

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

/* HCI Connection scheduler */
3838 3839
static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
				     int *quote)
L
Linus Torvalds 已提交
3840 3841
{
	struct hci_conn_hash *h = &hdev->conn_hash;
3842
	struct hci_conn *conn = NULL, *c;
3843
	unsigned int num = 0, min = ~0;
L
Linus Torvalds 已提交
3844

3845
	/* We don't have to lock device here. Connections are always
L
Linus Torvalds 已提交
3846
	 * added and removed with TX task disabled. */
3847 3848 3849 3850

	rcu_read_lock();

	list_for_each_entry_rcu(c, &h->list, list) {
3851
		if (c->type != type || skb_queue_empty(&c->data_q))
L
Linus Torvalds 已提交
3852
			continue;
3853 3854 3855 3856

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

L
Linus Torvalds 已提交
3857 3858 3859 3860 3861 3862
		num++;

		if (c->sent < min) {
			min  = c->sent;
			conn = c;
		}
3863 3864 3865

		if (hci_conn_num(hdev, type) == num)
			break;
L
Linus Torvalds 已提交
3866 3867
	}

3868 3869
	rcu_read_unlock();

L
Linus Torvalds 已提交
3870
	if (conn) {
3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889
		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;
			BT_ERR("Unknown link type");
		}

		q = cnt / num;
L
Linus Torvalds 已提交
3890 3891 3892 3893 3894 3895 3896 3897
		*quote = q ? q : 1;
	} else
		*quote = 0;

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

3898
static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
L
Linus Torvalds 已提交
3899 3900
{
	struct hci_conn_hash *h = &hdev->conn_hash;
3901
	struct hci_conn *c;
L
Linus Torvalds 已提交
3902

3903
	BT_ERR("%s link tx timeout", hdev->name);
L
Linus Torvalds 已提交
3904

3905 3906
	rcu_read_lock();

L
Linus Torvalds 已提交
3907
	/* Kill stalled connections */
3908
	list_for_each_entry_rcu(c, &h->list, list) {
3909
		if (c->type == type && c->sent) {
3910 3911
			BT_ERR("%s killing stalled connection %pMR",
			       hdev->name, &c->dst);
A
Andre Guedes 已提交
3912
			hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
L
Linus Torvalds 已提交
3913 3914
		}
	}
3915 3916

	rcu_read_unlock();
L
Linus Torvalds 已提交
3917 3918
}

3919 3920
static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
				      int *quote)
L
Linus Torvalds 已提交
3921
{
3922 3923
	struct hci_conn_hash *h = &hdev->conn_hash;
	struct hci_chan *chan = NULL;
3924
	unsigned int num = 0, min = ~0, cur_prio = 0;
L
Linus Torvalds 已提交
3925
	struct hci_conn *conn;
3926 3927 3928 3929
	int cnt, q, conn_num = 0;

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

3930 3931 3932
	rcu_read_lock();

	list_for_each_entry_rcu(conn, &h->list, list) {
3933 3934 3935 3936 3937 3938 3939 3940 3941 3942
		struct hci_chan *tmp;

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

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

		conn_num++;

3943
		list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970
			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;
	}

3971 3972
	rcu_read_unlock();

3973 3974 3975 3976 3977 3978 3979
	if (!chan)
		return NULL;

	switch (chan->conn->type) {
	case ACL_LINK:
		cnt = hdev->acl_cnt;
		break;
3980 3981 3982
	case AMP_LINK:
		cnt = hdev->block_cnt;
		break;
3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000
	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;
		BT_ERR("Unknown link type");
	}

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

4001 4002 4003 4004 4005 4006 4007 4008
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);

4009 4010 4011
	rcu_read_lock();

	list_for_each_entry_rcu(conn, &h->list, list) {
4012 4013 4014 4015 4016 4017 4018 4019 4020 4021
		struct hci_chan *chan;

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

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

		num++;

4022
		list_for_each_entry_rcu(chan, &conn->chan_list, list) {
4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039
			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,
4040
			       skb->priority);
4041 4042 4043 4044 4045
		}

		if (hci_conn_num(hdev, type) == num)
			break;
	}
4046 4047 4048

	rcu_read_unlock();

4049 4050
}

4051 4052 4053 4054 4055 4056
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);
}

4057
static void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
4058
{
4059
	if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
L
Linus Torvalds 已提交
4060 4061
		/* ACL tx timeout must be longer than maximum
		 * link supervision timeout (40.9 seconds) */
4062
		if (!cnt && time_after(jiffies, hdev->acl_last_tx +
4063
				       HCI_ACL_TX_TIMEOUT))
4064
			hci_link_tx_to(hdev, ACL_LINK);
L
Linus Torvalds 已提交
4065
	}
4066
}
L
Linus Torvalds 已提交
4067

4068
static void hci_sched_acl_pkt(struct hci_dev *hdev)
4069 4070 4071 4072 4073 4074 4075
{
	unsigned int cnt = hdev->acl_cnt;
	struct hci_chan *chan;
	struct sk_buff *skb;
	int quote;

	__check_timeout(hdev, cnt);
4076

4077
	while (hdev->acl_cnt &&
4078
	       (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
4079 4080
		u32 priority = (skb_peek(&chan->data_q))->priority;
		while (quote-- && (skb = skb_peek(&chan->data_q))) {
4081
			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4082
			       skb->len, skb->priority);
4083

4084 4085 4086 4087 4088 4089
			/* Stop if priority has changed */
			if (skb->priority < priority)
				break;

			skb = skb_dequeue(&chan->data_q);

4090
			hci_conn_enter_active_mode(chan->conn,
4091
						   bt_cb(skb)->force_active);
4092

4093
			hci_send_frame(hdev, skb);
L
Linus Torvalds 已提交
4094 4095 4096
			hdev->acl_last_tx = jiffies;

			hdev->acl_cnt--;
4097 4098
			chan->sent++;
			chan->conn->sent++;
L
Linus Torvalds 已提交
4099 4100
		}
	}
4101 4102 4103

	if (cnt != hdev->acl_cnt)
		hci_prio_recalculate(hdev, ACL_LINK);
L
Linus Torvalds 已提交
4104 4105
}

4106
static void hci_sched_acl_blk(struct hci_dev *hdev)
4107
{
4108
	unsigned int cnt = hdev->block_cnt;
4109 4110 4111
	struct hci_chan *chan;
	struct sk_buff *skb;
	int quote;
4112
	u8 type;
4113

4114
	__check_timeout(hdev, cnt);
4115

4116 4117 4118 4119 4120 4121 4122
	BT_DBG("%s", hdev->name);

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

4123
	while (hdev->block_cnt > 0 &&
4124
	       (chan = hci_chan_sent(hdev, type, &quote))) {
4125 4126 4127 4128 4129
		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,
4130
			       skb->len, skb->priority);
4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142

			/* 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,
4143
						   bt_cb(skb)->force_active);
4144

4145
			hci_send_frame(hdev, skb);
4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156
			hdev->acl_last_tx = jiffies;

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

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

	if (cnt != hdev->block_cnt)
4157
		hci_prio_recalculate(hdev, type);
4158 4159
}

4160
static void hci_sched_acl(struct hci_dev *hdev)
4161 4162 4163
{
	BT_DBG("%s", hdev->name);

4164 4165 4166 4167 4168 4169
	/* No ACL link over BR/EDR controller */
	if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
		return;

	/* No AMP link over AMP controller */
	if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182
		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
4183
/* Schedule SCO */
4184
static void hci_sched_sco(struct hci_dev *hdev)
L
Linus Torvalds 已提交
4185 4186 4187 4188 4189 4190 4191
{
	struct hci_conn *conn;
	struct sk_buff *skb;
	int quote;

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

4192 4193 4194
	if (!hci_conn_num(hdev, SCO_LINK))
		return;

L
Linus Torvalds 已提交
4195 4196 4197
	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);
4198
			hci_send_frame(hdev, skb);
L
Linus Torvalds 已提交
4199 4200 4201 4202 4203 4204 4205 4206

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

4207
static void hci_sched_esco(struct hci_dev *hdev)
4208 4209 4210 4211 4212 4213 4214
{
	struct hci_conn *conn;
	struct sk_buff *skb;
	int quote;

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

4215 4216 4217
	if (!hci_conn_num(hdev, ESCO_LINK))
		return;

4218 4219
	while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
						     &quote))) {
4220 4221
		while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
			BT_DBG("skb %p len %d", skb, skb->len);
4222
			hci_send_frame(hdev, skb);
4223 4224 4225 4226 4227 4228 4229 4230

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

4231
static void hci_sched_le(struct hci_dev *hdev)
4232
{
4233
	struct hci_chan *chan;
4234
	struct sk_buff *skb;
4235
	int quote, cnt, tmp;
4236 4237 4238

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

4239 4240 4241
	if (!hci_conn_num(hdev, LE_LINK))
		return;

4242
	if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
4243 4244
		/* LE tx timeout must be longer than maximum
		 * link supervision timeout (40.9 seconds) */
4245
		if (!hdev->le_cnt && hdev->le_pkts &&
4246
		    time_after(jiffies, hdev->le_last_tx + HZ * 45))
4247
			hci_link_tx_to(hdev, LE_LINK);
4248 4249 4250
	}

	cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
4251
	tmp = cnt;
4252
	while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
4253 4254
		u32 priority = (skb_peek(&chan->data_q))->priority;
		while (quote-- && (skb = skb_peek(&chan->data_q))) {
4255
			BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
4256
			       skb->len, skb->priority);
4257

4258 4259 4260 4261 4262 4263
			/* Stop if priority has changed */
			if (skb->priority < priority)
				break;

			skb = skb_dequeue(&chan->data_q);

4264
			hci_send_frame(hdev, skb);
4265 4266 4267
			hdev->le_last_tx = jiffies;

			cnt--;
4268 4269
			chan->sent++;
			chan->conn->sent++;
4270 4271
		}
	}
4272

4273 4274 4275 4276
	if (hdev->le_pkts)
		hdev->le_cnt = cnt;
	else
		hdev->acl_cnt = cnt;
4277 4278 4279

	if (cnt != tmp)
		hci_prio_recalculate(hdev, LE_LINK);
4280 4281
}

4282
static void hci_tx_work(struct work_struct *work)
L
Linus Torvalds 已提交
4283
{
4284
	struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
L
Linus Torvalds 已提交
4285 4286
	struct sk_buff *skb;

4287
	BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
4288
	       hdev->sco_cnt, hdev->le_cnt);
L
Linus Torvalds 已提交
4289

4290
	if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
4291 4292 4293 4294 4295 4296
		/* Schedule queues and send stuff to HCI driver */
		hci_sched_acl(hdev);
		hci_sched_sco(hdev);
		hci_sched_esco(hdev);
		hci_sched_le(hdev);
	}
4297

L
Linus Torvalds 已提交
4298 4299
	/* Send next queued raw (unknown type) packet */
	while ((skb = skb_dequeue(&hdev->raw_q)))
4300
		hci_send_frame(hdev, skb);
L
Linus Torvalds 已提交
4301 4302
}

L
Lucas De Marchi 已提交
4303
/* ----- HCI RX task (incoming data processing) ----- */
L
Linus Torvalds 已提交
4304 4305

/* ACL data packet */
4306
static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
L
Linus Torvalds 已提交
4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317
{
	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);

4318
	BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
4319
	       handle, flags);
L
Linus Torvalds 已提交
4320 4321 4322 4323 4324 4325

	hdev->stat.acl_rx++;

	hci_dev_lock(hdev);
	conn = hci_conn_hash_lookup_handle(hdev, handle);
	hci_dev_unlock(hdev);
4326

L
Linus Torvalds 已提交
4327
	if (conn) {
4328
		hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
4329

L
Linus Torvalds 已提交
4330
		/* Send to upper protocol */
4331 4332
		l2cap_recv_acldata(conn, skb, flags);
		return;
L
Linus Torvalds 已提交
4333
	} else {
4334
		BT_ERR("%s ACL packet for unknown connection handle %d",
4335
		       hdev->name, handle);
L
Linus Torvalds 已提交
4336 4337 4338 4339 4340 4341
	}

	kfree_skb(skb);
}

/* SCO data packet */
4342
static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
L
Linus Torvalds 已提交
4343 4344 4345 4346 4347 4348 4349 4350 4351
{
	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);

4352
	BT_DBG("%s len %d handle 0x%4.4x", hdev->name, skb->len, handle);
L
Linus Torvalds 已提交
4353 4354 4355 4356 4357 4358 4359 4360 4361

	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 */
4362 4363
		sco_recv_scodata(conn, skb);
		return;
L
Linus Torvalds 已提交
4364
	} else {
4365
		BT_ERR("%s SCO packet for unknown connection handle %d",
4366
		       hdev->name, handle);
L
Linus Torvalds 已提交
4367 4368 4369 4370 4371
	}

	kfree_skb(skb);
}

4372 4373 4374 4375 4376 4377 4378 4379
static bool hci_req_is_complete(struct hci_dev *hdev)
{
	struct sk_buff *skb;

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

4380
	return bt_cb(skb)->hci.req_start;
4381 4382
}

4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404
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);
}

4405 4406 4407
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)
4408 4409 4410 4411 4412 4413
{
	struct sk_buff *skb;
	unsigned long flags;

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

4414 4415
	/* If the completed command doesn't match the last one that was
	 * sent we need to do special handling of it.
4416
	 */
4417 4418 4419 4420 4421 4422 4423 4424 4425 4426
	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);

4427
		return;
4428
	}
4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439

	/* 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).
	 */
4440 4441
	if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
		*req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4442 4443
		return;
	}
4444

4445 4446
	if (bt_cb(hdev->sent_cmd)->hci.req_complete_skb) {
		*req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4447
		return;
4448 4449 4450 4451 4452
	}

	/* Remove all pending commands belonging to this request */
	spin_lock_irqsave(&hdev->cmd_q.lock, flags);
	while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4453
		if (bt_cb(skb)->hci.req_start) {
4454 4455 4456 4457
			__skb_queue_head(&hdev->cmd_q, skb);
			break;
		}

4458 4459
		*req_complete = bt_cb(skb)->hci.req_complete;
		*req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4460 4461 4462 4463 4464
		kfree_skb(skb);
	}
	spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
}

4465
static void hci_rx_work(struct work_struct *work)
L
Linus Torvalds 已提交
4466
{
4467
	struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
L
Linus Torvalds 已提交
4468 4469 4470 4471 4472
	struct sk_buff *skb;

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

	while ((skb = skb_dequeue(&hdev->rx_q))) {
4473 4474 4475
		/* Send copy to monitor */
		hci_send_to_monitor(hdev, skb);

L
Linus Torvalds 已提交
4476 4477
		if (atomic_read(&hdev->promisc)) {
			/* Send copy to the sockets */
4478
			hci_send_to_sock(hdev, skb);
L
Linus Torvalds 已提交
4479 4480
		}

4481
		if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
L
Linus Torvalds 已提交
4482 4483 4484 4485 4486 4487
			kfree_skb(skb);
			continue;
		}

		if (test_bit(HCI_INIT, &hdev->flags)) {
			/* Don't process data packets in this states. */
4488
			switch (bt_cb(skb)->pkt_type) {
L
Linus Torvalds 已提交
4489 4490 4491 4492
			case HCI_ACLDATA_PKT:
			case HCI_SCODATA_PKT:
				kfree_skb(skb);
				continue;
4493
			}
L
Linus Torvalds 已提交
4494 4495 4496
		}

		/* Process frame */
4497
		switch (bt_cb(skb)->pkt_type) {
L
Linus Torvalds 已提交
4498
		case HCI_EVENT_PKT:
4499
			BT_DBG("%s Event packet", hdev->name);
L
Linus Torvalds 已提交
4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519
			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;
		}
	}
}

4520
static void hci_cmd_work(struct work_struct *work)
L
Linus Torvalds 已提交
4521
{
4522
	struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
L
Linus Torvalds 已提交
4523 4524
	struct sk_buff *skb;

4525 4526
	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
4527 4528

	/* Send queued commands */
4529 4530 4531 4532 4533
	if (atomic_read(&hdev->cmd_cnt)) {
		skb = skb_dequeue(&hdev->cmd_q);
		if (!skb)
			return;

4534
		kfree_skb(hdev->sent_cmd);
L
Linus Torvalds 已提交
4535

4536
		hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
A
Andrei Emeltchenko 已提交
4537
		if (hdev->sent_cmd) {
L
Linus Torvalds 已提交
4538
			atomic_dec(&hdev->cmd_cnt);
4539
			hci_send_frame(hdev, skb);
4540
			if (test_bit(HCI_RESET, &hdev->flags))
4541
				cancel_delayed_work(&hdev->cmd_timer);
4542
			else
4543 4544
				schedule_delayed_work(&hdev->cmd_timer,
						      HCI_CMD_TIMEOUT);
L
Linus Torvalds 已提交
4545 4546
		} else {
			skb_queue_head(&hdev->cmd_q, skb);
4547
			queue_work(hdev->workqueue, &hdev->cmd_work);
L
Linus Torvalds 已提交
4548 4549 4550
		}
	}
}