/** @file

  Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _EDKII_ATA_PASS_THRU_PPI_H_
#define _EDKII_ATA_PASS_THRU_PPI_H_

#include <Protocol/DevicePath.h>
#include <Protocol/AtaPassThru.h>

///
/// Global ID for the EDKII_PEI_ATA_PASS_THRU_PPI.
///
#define EDKII_PEI_ATA_PASS_THRU_PPI_GUID \
  { \
    0xa16473fd, 0xd474, 0x4c89, { 0xae, 0xc7, 0x90, 0xb8, 0x3c, 0x73, 0x86, 0x9 } \
  }

//
// Forward declaration for the EDKII_PEI_ATA_PASS_THRU_PPI.
//
typedef struct _EDKII_PEI_ATA_PASS_THRU_PPI EDKII_PEI_ATA_PASS_THRU_PPI;

//
// Revision The revision to which the ATA Pass Thru PPI interface adheres.
//          All future revisions must be backwards compatible.
//          If a future version is not back wards compatible it is not the same GUID.
//
#define EDKII_PEI_ATA_PASS_THRU_PPI_REVISION  0x00010000

/**
  Sends an ATA command to an ATA device that is attached to the ATA controller.

  @param[in]     This                  The PPI instance pointer.
  @param[in]     Port                  The port number of the ATA device to send
                                       the command.
  @param[in]     PortMultiplierPort    The port multiplier port number of the ATA
                                       device to send the command.
                                       If there is no port multiplier, then specify
                                       0xFFFF.
  @param[in,out] Packet                A pointer to the ATA command to send to
                                       the ATA device specified by Port and
                                       PortMultiplierPort.

  @retval EFI_SUCCESS              The ATA command was sent by the host. For
                                   bi-directional commands, InTransferLength bytes
                                   were transferred from InDataBuffer. For write
                                   and bi-directional commands, OutTransferLength
                                   bytes were transferred by OutDataBuffer.
  @retval EFI_NOT_FOUND            The specified ATA device is not found.
  @retval EFI_INVALID_PARAMETER    The contents of Acb are invalid. The ATA command
                                   was not sent, so no additional status information
                                   is available.
  @retval EFI_BAD_BUFFER_SIZE      The ATA command was not executed. The number
                                   of bytes that could be transferred is returned
                                   in InTransferLength. For write and bi-directional
                                   commands, OutTransferLength bytes were transferred
                                   by OutDataBuffer.
  @retval EFI_NOT_READY            The ATA command could not be sent because there
                                   are too many ATA commands already queued. The
                                   caller may retry again later.
  @retval EFI_DEVICE_ERROR         A device error occurred while attempting to
                                   send the ATA command.

**/
typedef
EFI_STATUS
(EFIAPI *EDKII_PEI_ATA_PASS_THRU_PASSTHRU)(
  IN     EDKII_PEI_ATA_PASS_THRU_PPI         *This,
  IN     UINT16                              Port,
  IN     UINT16                              PortMultiplierPort,
  IN OUT EFI_ATA_PASS_THRU_COMMAND_PACKET    *Packet
  );

/**
  Used to retrieve the list of legal port numbers for ATA devices on an ATA controller.
  These can either be the list of ports where ATA devices are actually present or the
  list of legal port numbers for the ATA controller. Regardless, the caller of this
  function must probe the port number returned to see if an ATA device is actually
  present at that location on the ATA controller.

  The GetNextPort() function retrieves the port number on an ATA controller. If on
  input Port is 0xFFFF, then the port number of the first port on the ATA controller
  is returned in Port and EFI_SUCCESS is returned.

  If Port is a port number that was returned on a previous call to GetNextPort(),
  then the port number of the next port on the ATA controller is returned in Port,
  and EFI_SUCCESS is returned. If Port is not 0xFFFF and Port was not returned on
  a previous call to GetNextPort(), then EFI_INVALID_PARAMETER is returned.

  If Port is the port number of the last port on the ATA controller, then EFI_NOT_FOUND
  is returned.

  @param[in]     This    The PPI instance pointer.
  @param[in,out] Port    On input, a pointer to the port number on the ATA controller.
                         On output, a pointer to the next port number on the ATA
                         controller. An input value of 0xFFFF retrieves the first
                         port number on the ATA controller.

  @retval EFI_SUCCESS              The next port number on the ATA controller was
                                   returned in Port.
  @retval EFI_NOT_FOUND            There are no more ports on this ATA controller.
  @retval EFI_INVALID_PARAMETER    Port is not 0xFFFF and Port was not returned
                                   on a previous call to GetNextPort().

**/
typedef
EFI_STATUS
(EFIAPI *EDKII_PEI_ATA_PASS_THRU_THRU_GET_NEXT_PORT)(
  IN     EDKII_PEI_ATA_PASS_THRU_PPI    *This,
  IN OUT UINT16                         *Port
  );

/**
  Used to retrieve the list of legal port multiplier port numbers for ATA devices
  on a port of an ATA controller. These can either be the list of port multiplier
  ports where ATA devices are actually present on port or the list of legal port
  multiplier ports on that port. Regardless, the caller of this function must probe
  the port number and port multiplier port number returned to see if an ATA device
  is actually present.

  The GetNextDevice() function retrieves the port multiplier port number of an ATA
  device present on a port of an ATA controller.

  If PortMultiplierPort points to a port multiplier port number value that was
  returned on a previous call to GetNextDevice(), then the port multiplier port
  number of the next ATA device on the port of the ATA controller is returned in
  PortMultiplierPort, and EFI_SUCCESS is returned.

  If PortMultiplierPort points to 0xFFFF, then the port multiplier port number
  of the first ATA device on port of the ATA controller is returned in PortMultiplierPort
  and EFI_SUCCESS is returned.

  If PortMultiplierPort is not 0xFFFF and the value pointed to by PortMultiplierPort
  was not returned on a previous call to GetNextDevice(), then EFI_INVALID_PARAMETER
  is returned.

  If PortMultiplierPort is the port multiplier port number of the last ATA device
  on the port of the ATA controller, then EFI_NOT_FOUND is returned.

  When port multiplier is not connected to the Port, GetNextDevice() may either return
  EFI_SUCCESS and set PortMultiplierPort to 0xFFFF or return EFI_NOT_FOUND (in which case the
  PortMultiplierPort value is undefined).

  @param[in]     This                  The PPI instance pointer.
  @param[in]     Port                  The port number present on the ATA controller.
  @param[in,out] PortMultiplierPort    On input, a pointer to the port multiplier
                                       port number of an ATA device present on the
                                       ATA controller. If on input a PortMultiplierPort
                                       of 0xFFFF is specified, then the port multiplier
                                       port number of the first ATA device is returned.
                                       On output, a pointer to the port multiplier port
                                       number of the next ATA device present on an ATA
                                       controller.

  @retval EFI_SUCCESS              The port multiplier port number of the next ATA
                                   device on the port of the ATA controller was
                                   returned in PortMultiplierPort.
  @retval EFI_NOT_FOUND            There are no more ATA devices on this port of
                                   the ATA controller.
  @retval EFI_INVALID_PARAMETER    PortMultiplierPort is not 0xFFFF, and PortMultiplierPort
                                   was not returned on a previous call to GetNextDevice().

**/
typedef
EFI_STATUS
(EFIAPI *EDKII_PEI_ATA_PASS_THRU_GET_NEXT_DEVICE)(
  IN     EDKII_PEI_ATA_PASS_THRU_PPI    *This,
  IN     UINT16                         Port,
  IN OUT UINT16                         *PortMultiplierPort
  );

/**
  Gets the device path information of the underlying ATA host controller.

  @param[in]  This                The PPI instance pointer.
  @param[out] DevicePathLength    The length of the device path in bytes specified
                                  by DevicePath.
  @param[out] DevicePath          The device path of the underlying ATA host controller.
                                  This field re-uses EFI Device Path Protocol as
                                  defined by Section 10.2 EFI Device Path Protocol
                                  of UEFI 2.7 Specification.

  @retval EFI_SUCCESS              The device path of the ATA host controller has
                                   been successfully returned.
  @retval EFI_INVALID_PARAMETER    DevicePathLength or DevicePath is NULL.
  @retval EFI_OUT_OF_RESOURCES     Not enough resource to return the device path.

**/
typedef
EFI_STATUS
(EFIAPI *EDKII_PEI_ATA_PASS_THRU_GET_DEVICE_PATH)(
  IN  EDKII_PEI_ATA_PASS_THRU_PPI    *This,
  OUT UINTN                          *DevicePathLength,
  OUT EFI_DEVICE_PATH_PROTOCOL       **DevicePath
  );

//
// EDKII_PEI_ATA_PASS_THRU_PPI provides the services that are required to send
// ATA commands to an ATA device during PEI.
//
struct _EDKII_PEI_ATA_PASS_THRU_PPI {
  UINT64                                        Revision;
  EFI_ATA_PASS_THRU_MODE                        *Mode;
  EDKII_PEI_ATA_PASS_THRU_PASSTHRU              PassThru;
  EDKII_PEI_ATA_PASS_THRU_THRU_GET_NEXT_PORT    GetNextPort;
  EDKII_PEI_ATA_PASS_THRU_GET_NEXT_DEVICE       GetNextDevice;
  EDKII_PEI_ATA_PASS_THRU_GET_DEVICE_PATH       GetDevicePath;
};

extern EFI_GUID  gEdkiiPeiAtaPassThruPpiGuid;

#endif