alder_lake_bios/Intel/AlderLake/Features/BluetoothPkg/BluetoothBusDxe/BluetoothIntHciEvent.c

//
// This file contains a 'Sample Driver' and is licensed as such
// under the terms of your license agreement with Intel or your
// vendor.  This file may be modified by the user, subject to
// the additional terms of the license agreement
//
/** @file
 The file is used to send and receive all HCI cmds/events.

Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.<BR>
This software and associated documentation (if any) is furnished
under a license and may only be used or copied in accordance
with the terms of the license. Except as permitted by such
license, no part of this software or documentation may be
reproduced, stored in a retrieval system, or transmitted in any
form or by any means without the express written consent of
Intel Corporation.

**/

#include "BluetoothBusDxe.h"

/**
  Removes all the nodes in a doubly-linked list.

  The list is specified by the head node and the corresponding signature of the
  list.

  @param[in]  Link       The pointer to the head node of a doubly-linked list.
  @param[in]  Signature  The signature for the doubly-linked list.

  @retval TRUE  The function always returns TRUE.

**/
BOOLEAN
BtClearList (
  IN LIST_ENTRY                  *Link,
  IN UINTN                       Signature
  )
{
  EFI_TPL                             OldTpl;
  LIST_ENTRY                          *LinkWalker;
  LIST_ENTRY                          *NextLink;
  BT_LE_DEV_INFO                      *BtLeDevInfo;
  BT_LE_PAIRED_DEV_INFO               *BtLePairedDevInfoList;
  BT_LE_SB_DEV                        *BtLeSbDev;

  LinkWalker = Link->ForwardLink;
  NextLink = NULL;

  OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
  switch (Signature) {
    case BT_LE_DEV_INFO_SIGNATURE:
      for (;LinkWalker != Link; ) {
        BtLeDevInfo = CR(LinkWalker, BT_LE_DEV_INFO, Link, BT_LE_DEV_INFO_SIGNATURE);
        NextLink = LinkWalker->ForwardLink;
        RemoveEntryList (LinkWalker);
        FreePool (BtLeDevInfo);
        LinkWalker = NextLink;
      }
      break;
    case BT_LE_PAIRED_DEV_INFO_SIGNATURE:
      for (;LinkWalker != Link; ) {
        BtLePairedDevInfoList = CR(LinkWalker, BT_LE_PAIRED_DEV_INFO, Link, BT_LE_PAIRED_DEV_INFO_SIGNATURE);
        NextLink = LinkWalker->ForwardLink;
        RemoveEntryList (LinkWalker);
        FreePool (BtLePairedDevInfoList);
        LinkWalker = NextLink;
      }
      break;
    case BT_LE_SB_DEV_SIGNATURE:
      for (;LinkWalker != Link; ) {
        BtLeSbDev = CR(LinkWalker, BT_LE_SB_DEV, Link, BT_LE_SB_DEV_SIGNATURE);
        NextLink = LinkWalker->ForwardLink;
        BtDelLeSb (BtLeSbDev->BtHcDev, BtLeSbDev);
        LinkWalker = NextLink;
      }
      break;
    default:
      break;
  }
  gBS->RestoreTPL (OldTpl);

  return TRUE;
}

/**
  Finds a BluetoothLE Service Binding device with given Bluetooth device
  address.

  @param[in]  BtHcDev  A pointer to the BTHC_DEV structure.
  @param[in]  BDAddr   A pointer to a Bluetooth device address to search.

  @retval  A pointer to the BT_LE_SB_DEV structure, if the given Bluetooth
           device address matches a device in the BluetoothLE Service Binding
           device list.
  @retval  NULL, if the given Bluetooth device address does not match any
           device in the BluetoothLE Service Binding device list.

**/
BT_LE_SB_DEV*
BtFindLeSbDevByBDaddr (
  IN BTHC_DEV                   *BtHcDev,
  IN BLUETOOTH_LE_ADDRESS       *BDAddr
  )
{
  LIST_ENTRY    *BtLeSbDevList;
  LIST_ENTRY    *Link;
  BT_LE_SB_DEV     *BtLeSbDev;
  EFI_TPL       OldTpl;

  BtLeSbDevList = &BtHcDev->BtLeSbList;
  OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
  for (Link = BtLeSbDevList->ForwardLink;
       Link != BtLeSbDevList;
       Link = Link->ForwardLink) {
    BtLeSbDev = CR (
                  Link,
                  BT_LE_SB_DEV,
                  Link,
                  BT_LE_SB_DEV_SIGNATURE
                  );

    /* Currently checking only with BD Address as Stack in not returning the correct BD Address Type in case of Privacy 1.2.
     * TODO: Check with BD Address Type as well. */
  if (((CompareMem (&BtLeSbDev->BtLeDevInfo->BDAddr.Address, &BDAddr->Address, sizeof(BDAddr->Address)) == 0)) ||
     ((CompareMem (&BtLeSbDev->BtLeDevInfo->IDAddr.Address, &BDAddr->Address, sizeof(BDAddr->Address)) == 0))) {
      gBS->RestoreTPL (OldTpl);
      return BtLeSbDev;
    }
  }
  gBS->RestoreTPL (OldTpl);
  return NULL;
}

/**
  Finds a paired BluetoothLE device with given Bluetooth device address.

  @param[in]  BtHcDev  A pointer to the BTHC_DEV structure.
  @param[in]  BDAddr   A pointer to a Bluetooth device address to search.

  @retval  A pointer to the BT_LE_PAIRED_DEV_INFO structure, if the given
           Bluetooth device address matches a device in the BluetoothLE paired
           device list.
  @retval  NULL, if the given Bluetooth device address does not match any
           device in the BluetoothLE paired device list.

**/
BT_LE_PAIRED_DEV_INFO*
BtFindLePairedDevByBDAddr (
  IN BTHC_DEV                   *BtHcDev,
  IN BLUETOOTH_LE_ADDRESS          *BDAddr
  )
{
  LIST_ENTRY                *Link;
  LIST_ENTRY                *BtLePairedDevLink;
  BT_LE_PAIRED_DEV_INFO   *BtLePairedDevInfo;
  BtLePairedDevLink = &BtHcDev->BtLePairedList;

  for (Link = BtLePairedDevLink->ForwardLink; Link != BtLePairedDevLink; Link = Link->ForwardLink) {
    BtLePairedDevInfo = CR (Link, BT_LE_PAIRED_DEV_INFO, Link, BT_LE_PAIRED_DEV_INFO_SIGNATURE);
    if ((CompareMem (&BtLePairedDevInfo->BDAddr.Address, &BDAddr->Address, sizeof(BDAddr->Address)) == 0)
      || (CompareMem (&BtLePairedDevInfo->IDAddr.Address, &BDAddr->Address, sizeof(BDAddr->Address)) == 0))
      return BtLePairedDevInfo;
  }
  return NULL;
}