/** @file
  NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows
  NVM Express specification.

  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
  Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _NVME_HCI_H_
#define _NVME_HCI_H_

#define NVME_BAR                 0

//
// Offset from the beginning of private data queue buffer
//
#define NVME_ASQ_BUF_OFFSET                  EFI_PAGE_SIZE

/**
  Initialize the Nvm Express controller.

  @param[in] Private                 The pointer to the NVME_CONTROLLER_PRIVATE_DATA data structure.

  @retval EFI_SUCCESS                The NVM Express Controller is initialized successfully.
  @retval Others                     A device error occurred while initializing the controller.

**/
EFI_STATUS
NvmeControllerInit (
  IN NVME_CONTROLLER_PRIVATE_DATA    *Private
  );

/**
  Get identify controller data.

  @param  Private          The pointer to the NVME_CONTROLLER_PRIVATE_DATA data structure.
  @param  Buffer           The buffer used to store the identify controller data.

  @return EFI_SUCCESS      Successfully get the identify controller data.
  @return EFI_DEVICE_ERROR Fail to get the identify controller data.

**/
EFI_STATUS
NvmeIdentifyController (
  IN NVME_CONTROLLER_PRIVATE_DATA       *Private,
  IN VOID                               *Buffer
  );

/**
  Get specified identify namespace data.

  @param  Private          The pointer to the NVME_CONTROLLER_PRIVATE_DATA data structure.
  @param  NamespaceId      The specified namespace identifier.
  @param  Buffer           The buffer used to store the identify namespace data.

  @return EFI_SUCCESS      Successfully get the identify namespace data.
  @return EFI_DEVICE_ERROR Fail to get the identify namespace data.

**/
EFI_STATUS
NvmeIdentifyNamespace (
  IN NVME_CONTROLLER_PRIVATE_DATA      *Private,
  IN UINT32                            NamespaceId,
  IN VOID                              *Buffer
  );

#endif