/** @file
  EFI_EXT_SCSI_PASS_THRU_PROTOCOL as defined in UEFI 2.0.
  This protocol provides services that allow SCSI Pass Thru commands 
  to be sent to SCSI devices attached to a SCSI channel.

  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials                          
  are licensed and made available under the terms and conditions of the BSD License         
  which accompanies this distribution.  The full text of the license may be found at        
  http://opensource.org/licenses/bsd-license.php                                            

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

**/

#ifndef __EXT_SCSI_PASS_THROUGH_PROTOCOL_H__
#define __EXT_SCSI_PASS_THROUGH_PROTOCOL_H__

#define EFI_EXT_SCSI_PASS_THRU_PROTOCOL_GUID \
  { \
    0x143b7632, 0xb81b, 0x4cb7, {0xab, 0xd3, 0xb6, 0x25, 0xa5, 0xb9, 0xbf, 0xfe } \
  }

typedef struct _EFI_EXT_SCSI_PASS_THRU_PROTOCOL EFI_EXT_SCSI_PASS_THRU_PROTOCOL;

#define TARGET_MAX_BYTES                             0x10

#define EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_PHYSICAL   0x0001
#define EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_LOGICAL    0x0002
#define EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_NONBLOCKIO 0x0004

//
// DataDirection
//
#define EFI_EXT_SCSI_DATA_DIRECTION_READ             0
#define EFI_EXT_SCSI_DATA_DIRECTION_WRITE            1
#define EFI_EXT_SCSI_DATA_DIRECTION_BIDIRECTIONAL    2
//
// HostAdapterStatus
//
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_OK                    0x00
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_TIMEOUT_COMMAND       0x09
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_TIMEOUT               0x0b
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_MESSAGE_REJECT        0x0d
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_BUS_RESET             0x0e
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_PARITY_ERROR          0x0f
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_REQUEST_SENSE_FAILED  0x10
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_SELECTION_TIMEOUT     0x11
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_DATA_OVERRUN_UNDERRUN 0x12
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_BUS_FREE              0x13
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_PHASE_ERROR           0x14
#define EFI_EXT_SCSI_STATUS_HOST_ADAPTER_OTHER                 0x7f
//
// TargetStatus
//
#define EFI_EXT_SCSI_STATUS_TARGET_GOOD                        0x00
#define EFI_EXT_SCSI_STATUS_TARGET_CHECK_CONDITION             0x02
#define EFI_EXT_SCSI_STATUS_TARGET_CONDITION_MET               0x04
#define EFI_EXT_SCSI_STATUS_TARGET_BUSY                        0x08
#define EFI_EXT_SCSI_STATUS_TARGET_INTERMEDIATE                0x10
#define EFI_EXT_SCSI_STATUS_TARGET_INTERMEDIATE_CONDITION_MET  0x14
#define EFI_EXT_SCSI_STATUS_TARGET_RESERVATION_CONFLICT        0x18
#define EFI_EXT_SCSI_STATUS_TARGET_TASK_SET_FULL               0x28
#define EFI_EXT_SCSI_STATUS_TARGET_ACA_ACTIVE                  0x30
#define EFI_EXT_SCSI_STATUS_TARGET_TASK_ABORTED                0x40

typedef struct {
  ///
  /// The Target ID of the host adapter on the SCSI channel.
  ///
  UINT32 AdapterId;
  ///
  /// Additional information on the attributes of the SCSI channel.
  ///
  UINT32 Attributes;
  ///
  /// Supplies the alignment requirement for any buffer used in a data transfer.
  ///
  UINT32 IoAlign;
} EFI_EXT_SCSI_PASS_THRU_MODE;

typedef struct {
  ///
  /// The timeout, in 100 ns units, to use for the execution of this SCSI
  /// Request Packet. A Timeout value of 0 means that this function
  /// will wait indefinitely for the SCSI Request Packet to execute. If
  /// Timeout is greater than zero, then this function will return
  /// EFI_TIMEOUT if the time required to execute the SCSI
  /// Request Packet is greater than Timeout.
  ///
  UINT64 Timeout;
  ///
  /// A pointer to the data buffer to transfer between the SCSI
  /// controller and the SCSI device for read and bidirectional commands.
  ///
  VOID   *InDataBuffer;
  ///
  /// A pointer to the data buffer to transfer between the SCSI
  /// controller and the SCSI device for write or bidirectional commands.
  ///
  VOID   *OutDataBuffer;
  ///
  /// A pointer to the sense data that was generated by the execution of
  /// the SCSI Request Packet.
  ///
  VOID   *SenseData;
  ///
  /// A pointer to buffer that contains the Command Data Block to
  /// send to the SCSI device specified by Target and Lun.
  ///
  VOID   *Cdb;
  ///
  /// On Input, the size, in bytes, of InDataBuffer. On output, the
  /// number of bytes transferred between the SCSI controller and the SCSI device.
  ///
  UINT32 InTransferLength;
  ///
  /// On Input, the size, in bytes of OutDataBuffer. On Output, the
  /// Number of bytes transferred between SCSI Controller and the SCSI device.
  ///
  UINT32 OutTransferLength;
  ///
  /// The length, in bytes, of the buffer Cdb. The standard values are 6,
  /// 10, 12, and 16, but other values are possible if a variable length CDB is used.
  ///
  UINT8  CdbLength;
  ///
  /// The direction of the data transfer. 0 for reads, 1 for writes. A
  /// value of 2 is Reserved for Bi-Directional SCSI commands.
  ///
  UINT8  DataDirection;
  ///
  /// The status of the host adapter specified by This when the SCSI
  /// Request Packet was executed on the target device.
  ///
  UINT8  HostAdapterStatus;
  ///
  /// The status returned by the device specified by Target and Lun
  /// when the SCSI Request Packet was executed.
  ///
  UINT8  TargetStatus;
  ///
  /// On input, the length in bytes of the SenseData buffer. On
  /// output, the number of bytes written to the SenseData buffer.
  ///
  UINT8  SenseDataLength;
} EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET;

/**
  Sends a SCSI Request Packet to a SCSI device that is attached to the SCSI channel. This function   
  supports both blocking I/O and nonblocking I/O. The blocking I/O functionality is required, and the
  nonblocking I/O functionality is optional.                                                             

  @param  This    A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
  @param  Target  The Target is an array of size TARGET_MAX_BYTES and it represents
                  the id of the SCSI device to send the SCSI Request Packet. Each
                  transport driver may choose to utilize a subset of this size to suit the needs
                  of transport target representation. For example, a Fibre Channel driver
                  may use only 8 bytes (WWN) to represent an FC target.
  @param  Lun     The LUN of the SCSI device to send the SCSI Request Packet.
  @param  Packet  A pointer to the SCSI Request Packet to send to the SCSI device
                  specified by Target and Lun.
  @param  Event   If nonblocking I/O is not supported then Event is ignored, and blocking
                  I/O is performed. If Event is NULL, then blocking I/O is performed. If
                  Event is not NULL and non blocking I/O is supported, then
                  nonblocking I/O is performed, and Event will be signaled when the
                  SCSI Request Packet completes.

  @retval EFI_SUCCESS           The SCSI Request Packet 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_BAD_BUFFER_SIZE   The SCSI Request Packet 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 SCSI Request Packet could not be sent because there are too many
                                SCSI Request Packets already queued. The caller may retry again later.
  @retval EFI_DEVICE_ERROR      A device error occurred while attempting to send the SCSI Request
                                Packet.
  @retval EFI_INVALID_PARAMETER Target, Lun, or the contents of ScsiRequestPacket are invalid.
  @retval EFI_UNSUPPORTED       The command described by the SCSI Request Packet is not supported
                                by the host adapter. This includes the case of Bi-directional SCSI
                                commands not supported by the implementation. The SCSI Request
                                Packet was not sent, so no additional status information is available.
  @retval EFI_TIMEOUT           A timeout occurred while waiting for the SCSI Request Packet to execute.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_PASSTHRU)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL                *This,
  IN UINT8                                          *Target,
  IN UINT64                                         Lun,
  IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET *Packet,
  IN EFI_EVENT                                      Event     OPTIONAL
  );      

/**
  Used to retrieve the list of legal Target IDs and LUNs for SCSI devices on a SCSI channel. These       
  can either be the list SCSI devices that are actually present on the SCSI channel, or the list of legal
  Target Ids and LUNs for the SCSI channel. Regardless, the caller of this function must probe the       
  Target ID and LUN returned to see if a SCSI device is actually present at that location on the SCSI    
  channel.                                                                                               

  @param  This   A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
  @param  Target On input, a pointer to the Target ID (an array of size
                 TARGET_MAX_BYTES) of a SCSI device present on the SCSI channel.
                 On output, a pointer to the Target ID (an array of
                 TARGET_MAX_BYTES) of the next SCSI device present on a SCSI
                 channel. An input value of 0xF(all bytes in the array are 0xF) in the
                 Target array retrieves the Target ID of the first SCSI device present on a
                 SCSI channel.
  @param  Lun    On input, a pointer to the LUN of a SCSI device present on the SCSI
                 channel. On output, a pointer to the LUN of the next SCSI device present
                 on a SCSI channel.

  @retval EFI_SUCCESS           The Target ID and LUN of the next SCSI device on the SCSI
                                channel was returned in Target and Lun.
  @retval EFI_INVALID_PARAMETER Target array is not all 0xF, and Target and Lun were
                                not returned on a previous call to GetNextTargetLun().
  @retval EFI_NOT_FOUND         There are no more SCSI devices on this SCSI channel.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_GET_NEXT_TARGET_LUN)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL                *This,
  IN OUT UINT8                                      **Target,
  IN OUT UINT64                                     *Lun
  );   

/**
  Used to allocate and build a device path node for a SCSI device on a SCSI channel.

  @param  This       A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
  @param  Target     The Target is an array of size TARGET_MAX_BYTES and it specifies the
                     Target ID of the SCSI device for which a device path node is to be
                     allocated and built. Transport drivers may chose to utilize a subset of
                     this size to suit the representation of targets. For example, a Fibre
                     Channel driver may use only 8 bytes (WWN) in the array to represent a
                     FC target.
  @param  Lun        The LUN of the SCSI device for which a device path node is to be
                     allocated and built.
  @param  DevicePath A pointer to a single device path node that describes the SCSI device
                     specified by Target and Lun. This function is responsible for
                     allocating the buffer DevicePath with the boot service
                     AllocatePool(). It is the caller's responsibility to free
                     DevicePath when the caller is finished with DevicePath.

  @retval EFI_SUCCESS           The device path node that describes the SCSI device specified by
                                Target and Lun was allocated and returned in
                                DevicePath.
  @retval EFI_INVALID_PARAMETER DevicePath is NULL.
  @retval EFI_NOT_FOUND         The SCSI devices specified by Target and Lun does not exist
                                on the SCSI channel.
  @retval EFI_OUT_OF_RESOURCES  There are not enough resources to allocate DevicePath.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_BUILD_DEVICE_PATH)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL               *This,
  IN UINT8                                         *Target,
  IN UINT64                                        Lun,
  IN OUT EFI_DEVICE_PATH_PROTOCOL                  **DevicePath
  );

/**
  Used to translate a device path node to a Target ID and LUN.

  @param  This       A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
  @param  DevicePath A pointer to a single device path node that describes the SCSI device
                     on the SCSI channel.
  @param  Target     A pointer to the Target Array which represents the ID of a SCSI device
                     on the SCSI channel.
  @param  Lun        A pointer to the LUN of a SCSI device on the SCSI channel.

  @retval EFI_SUCCESS           DevicePath was successfully translated to a Target ID and
                                LUN, and they were returned in Target and Lun.
  @retval EFI_INVALID_PARAMETER DevicePath or Target or Lun is NULL.
  @retval EFI_NOT_FOUND         A valid translation from DevicePath to a Target ID and LUN
                                does not exist.
  @retval EFI_UNSUPPORTED       This driver does not support the device path node type in
                                 DevicePath.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_GET_TARGET_LUN)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL               *This,
  IN EFI_DEVICE_PATH_PROTOCOL                      *DevicePath,
  OUT UINT8                                        **Target,
  OUT UINT64                                       *Lun
  );       

/**
  Resets a SCSI channel. This operation resets all the SCSI devices connected to the SCSI channel.

  @param  This A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.

  @retval EFI_SUCCESS      The SCSI channel was reset.
  @retval EFI_DEVICE_ERROR A device error occurred while attempting to reset the SCSI channel.
  @retval EFI_TIMEOUT      A timeout occurred while attempting to reset the SCSI channel.
  @retval EFI_UNSUPPORTED  The SCSI channel does not support a channel reset operation.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_RESET_CHANNEL)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL               *This
  );    
  
/**
  Resets a SCSI logical unit that is connected to a SCSI channel.

  @param  This   A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
  @param  Target The Target is an array of size TARGET_MAX_BYTE and it represents the
                 target port ID of the SCSI device containing the SCSI logical unit to
                 reset. Transport drivers may chose to utilize a subset of this array to suit
                 the representation of their targets.
  @param  Lun    The LUN of the SCSI device to reset.

  @retval EFI_SUCCESS           The SCSI device specified by Target and Lun was reset.
  @retval EFI_INVALID_PARAMETER Target or Lun is NULL.
  @retval EFI_TIMEOUT           A timeout occurred while attempting to reset the SCSI device
                                specified by Target and Lun.
  @retval EFI_UNSUPPORTED       The SCSI channel does not support a target reset operation.
  @retval EFI_DEVICE_ERROR      A device error occurred while attempting to reset the SCSI device
                                 specified by Target and Lun.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_RESET_TARGET_LUN)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL               *This,
  IN UINT8                                         *Target,
  IN UINT64                                        Lun
  );         

/**
  Used to retrieve the list of legal Target IDs for SCSI devices on a SCSI channel. These can either     
  be the list SCSI devices that are actually present on the SCSI channel, or the list of legal Target IDs
  for the SCSI channel. Regardless, the caller of this function must probe the Target ID returned to     
  see if a SCSI device is actually present at that location on the SCSI channel.                         

  @param  This   A pointer to the EFI_EXT_SCSI_PASS_THRU_PROTOCOL instance.
  @param  Target (TARGET_MAX_BYTES) of a SCSI device present on the SCSI channel.
                 On output, a pointer to the Target ID (an array of
                 TARGET_MAX_BYTES) of the next SCSI device present on a SCSI
                 channel. An input value of 0xF(all bytes in the array are 0xF) in the
                 Target array retrieves the Target ID of the first SCSI device present on a
                 SCSI channel.

  @retval EFI_SUCCESS           The Target ID of the next SCSI device on the SCSI
                                channel was returned in Target.
  @retval EFI_INVALID_PARAMETER Target or Lun is NULL.
  @retval EFI_TIMEOUT           Target array is not all 0xF, and Target was not
                                returned on a previous call to GetNextTarget().
  @retval EFI_NOT_FOUND         There are no more SCSI devices on this SCSI channel.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXT_SCSI_PASS_THRU_GET_NEXT_TARGET)(
  IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL               *This,
  IN OUT UINT8                                     **Target
  );          

///
/// The EFI_EXT_SCSI_PASS_THRU_PROTOCOL provides information about a SCSI channel 
/// and the ability to send SCI Request Packets to any SCSI device attached to 
/// that SCSI channel. The information includes the Target ID of the host controller 
/// on the SCSI channel and the attributes of the SCSI channel.
///
struct _EFI_EXT_SCSI_PASS_THRU_PROTOCOL {
  ///
  /// A pointer to the EFI_EXT_SCSI_PASS_THRU_MODE data for this SCSI channel.
  ///
  EFI_EXT_SCSI_PASS_THRU_MODE                *Mode;
  EFI_EXT_SCSI_PASS_THRU_PASSTHRU            PassThru;
  EFI_EXT_SCSI_PASS_THRU_GET_NEXT_TARGET_LUN GetNextTargetLun;
  EFI_EXT_SCSI_PASS_THRU_BUILD_DEVICE_PATH   BuildDevicePath;
  EFI_EXT_SCSI_PASS_THRU_GET_TARGET_LUN      GetTargetLun;
  EFI_EXT_SCSI_PASS_THRU_RESET_CHANNEL       ResetChannel;
  EFI_EXT_SCSI_PASS_THRU_RESET_TARGET_LUN    ResetTargetLun;
  EFI_EXT_SCSI_PASS_THRU_GET_NEXT_TARGET     GetNextTarget;
};

extern EFI_GUID gEfiExtScsiPassThruProtocolGuid;

#endif
