[mirror_edk2.git] / MdeModulePkg / Bus / Pci / IdeBusPei / AtapiPeim.h

/** @file\r
Private Include file for IdeBus PEIM.\r
\r
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions\r
of the BSD License which accompanies this distribution.  The\r
full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef _RECOVERY_ATAPI_H_\r
#define _RECOVERY_ATAPI_H_\r
\r
#include <PiPei.h>\r
\r
#include <Ppi/BlockIo.h>\r
#include <Ppi/AtaController.h>\r
\r
#include <Library/DebugLib.h>\r
#include <Library/TimerLib.h>\r
#include <Library/PeimEntryPoint.h>\r
#include <Library/PeiServicesLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/IoLib.h>\r
#include <Library/PeiServicesTablePointerLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/PcdLib.h>\r
\r
\r
#include <IndustryStandard/Atapi.h>\r
\r
#define MAX_SENSE_KEY_COUNT 6\r
#define MAX_IDE_CHANNELS    4  // Ide and Sata Primary, Secondary Channel.\r
#define MAX_IDE_DEVICES     8  // Ide, Sata Primary, Secondary and Master, Slave device.\r
\r
typedef enum {\r
  IdePrimary    = 0,\r
  IdeSecondary  = 1,\r
  IdeMaxChannel = 2\r
} EFI_IDE_CHANNEL;\r
\r
typedef enum {\r
  IdeMaster     = 0,\r
  IdeSlave      = 1,\r
  IdeMaxDevice  = 2\r
} EFI_IDE_DEVICE;\r
\r
//\r
// IDE Registers\r
//\r
typedef union {\r
  UINT16  Command;        /* when write */\r
  UINT16  Status;         /* when read */\r
} IDE_CMD_OR_STATUS;\r
\r
typedef union {\r
  UINT16  Error;          /* when read */\r
  UINT16  Feature;        /* when write */\r
} IDE_ERROR_OR_FEATURE;\r
\r
typedef union {\r
  UINT16  AltStatus;      /* when read */\r
  UINT16  DeviceControl;  /* when write */\r
} IDE_ALTSTATUS_OR_DEVICECONTROL;\r
\r
//\r
// IDE registers set\r
//\r
typedef struct {\r
  UINT16                          Data;\r
  IDE_ERROR_OR_FEATURE            Reg1;\r
  UINT16                          SectorCount;\r
  UINT16                          SectorNumber;\r
  UINT16                          CylinderLsb;\r
  UINT16                          CylinderMsb;\r
  UINT16                          Head;\r
  IDE_CMD_OR_STATUS               Reg;\r
\r
  IDE_ALTSTATUS_OR_DEVICECONTROL  Alt;\r
  UINT16                          DriveAddress;\r
} IDE_BASE_REGISTERS;\r
\r
typedef struct {\r
\r
  UINTN                   DevicePosition;\r
  EFI_PEI_BLOCK_IO_MEDIA  MediaInfo;\r
\r
} PEI_ATAPI_DEVICE_INFO;\r
\r
#define ATAPI_BLK_IO_DEV_SIGNATURE  SIGNATURE_32 ('a', 'b', 'i', 'o')\r
typedef struct {\r
  UINTN                           Signature;\r
\r
  EFI_PEI_RECOVERY_BLOCK_IO_PPI   AtapiBlkIo;\r
  EFI_PEI_PPI_DESCRIPTOR          PpiDescriptor;\r
  PEI_ATA_CONTROLLER_PPI          *AtaControllerPpi;\r
\r
  UINTN                           DeviceCount;\r
  PEI_ATAPI_DEVICE_INFO           DeviceInfo[MAX_IDE_DEVICES];   //for max 8 device\r
  IDE_BASE_REGISTERS              IdeIoPortReg[MAX_IDE_CHANNELS]; //for max 4 channel.\r
} ATAPI_BLK_IO_DEV;\r
\r
#define PEI_RECOVERY_ATAPI_FROM_BLKIO_THIS(a) CR (a, ATAPI_BLK_IO_DEV, AtapiBlkIo, ATAPI_BLK_IO_DEV_SIGNATURE)\r
\r
\r
#define STALL_1_MILLI_SECOND  1000  // stall 1 ms\r
#define STALL_1_SECONDS       1000 * STALL_1_MILLI_SECOND\r
\r
//\r
// Time Out Value For IDE Device Polling\r
//\r
// ATATIMEOUT is used for waiting time out for ATA device\r
//\r
#define ATATIMEOUT  1000  // 1 second\r
// ATAPITIMEOUT is used for waiting operation\r
// except read and write time out for ATAPI device\r
//\r
#define ATAPITIMEOUT  1000  // 1 second\r
// ATAPILONGTIMEOUT is used for waiting read and\r
// write operation timeout for ATAPI device\r
//\r
#define CDROMLONGTIMEOUT  2000  // 2 seconds\r
#define ATAPILONGTIMEOUT  5000  // 5 seconds\r
\r
//\r
// PEI Recovery Block I/O PPI\r
//\r
\r
/**\r
  Gets the count of block I/O devices that one specific block driver detects.\r
\r
  This function is used for getting the count of block I/O devices that one \r
  specific block driver detects.  To the PEI ATAPI driver, it returns the number\r
  of all the detected ATAPI devices it detects during the enumeration process. \r
  To the PEI legacy floppy driver, it returns the number of all the legacy \r
  devices it finds during its enumeration process. If no device is detected, \r
  then the function will return zero.  \r
  \r
  @param[in]  PeiServices          General-purpose services that are available \r
                                   to every PEIM.\r
  @param[in]  This                 Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI \r
                                   instance.\r
  @param[out] NumberBlockDevices   The number of block I/O devices discovered.\r
\r
  @retval     EFI_SUCCESS          Operation performed successfully.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
AtapiGetNumberOfBlockDevices (\r
  IN   EFI_PEI_SERVICES                  **PeiServices,\r
  IN   EFI_PEI_RECOVERY_BLOCK_IO_PPI     *This,\r
  OUT  UINTN                             *NumberBlockDevices\r
  );\r
\r
/**\r
  Gets a block device's media information.\r
\r
  This function will provide the caller with the specified block device's media \r
  information. If the media changes, calling this function will update the media \r
  information accordingly.\r
\r
  @param[in]  PeiServices   General-purpose services that are available to every\r
                            PEIM\r
  @param[in]  This          Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI instance.\r
  @param[in]  DeviceIndex   Specifies the block device to which the function wants \r
                            to talk. Because the driver that implements Block I/O \r
                            PPIs will manage multiple block devices, the PPIs that \r
                            want to talk to a single device must specify the \r
                            device index that was assigned during the enumeration\r
                            process. This index is a number from one to \r
                            NumberBlockDevices.\r
  @param[out] MediaInfo     The media information of the specified block media.  \r
                            The caller is responsible for the ownership of this \r
                            data structure.\r
  \r
  @retval EFI_SUCCESS           Media information about the specified block device \r
                                was obtained successfully.\r
  @retval EFI_DEVICE_ERROR      Cannot get the media information due to a hardware \r
                                error.\r
  @retval Others                Other failure occurs.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
AtapiGetBlockDeviceMediaInfo (\r
  IN   EFI_PEI_SERVICES                     **PeiServices,\r
  IN   EFI_PEI_RECOVERY_BLOCK_IO_PPI        *This,\r
  IN   UINTN                                DeviceIndex,\r
  OUT  EFI_PEI_BLOCK_IO_MEDIA               *MediaInfo\r
  );\r
\r
/**\r
  Reads the requested number of blocks from the specified block device.\r
\r
  The function reads the requested number of blocks from the device. All the \r
  blocks are read, or an error is returned. If there is no media in the device,\r
  the function returns EFI_NO_MEDIA.\r
\r
  @param[in]  PeiServices   General-purpose services that are available to \r
                            every PEIM.\r
  @param[in]  This          Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI instance.\r
  @param[in]  DeviceIndex   Specifies the block device to which the function wants \r
                            to talk. Because the driver that implements Block I/O \r
                            PPIs will manage multiple block devices, the PPIs that \r
                            want to talk to a single device must specify the device \r
                            index that was assigned during the enumeration process. \r
                            This index is a number from one to NumberBlockDevices.\r
  @param[in]  StartLBA      The starting logical block address (LBA) to read from\r
                            on the device\r
  @param[in]  BufferSize    The size of the Buffer in bytes. This number must be\r
                            a multiple of the intrinsic block size of the device.\r
  @param[out] Buffer        A pointer to the destination buffer for the data.\r
                            The caller is responsible for the ownership of the \r
                            buffer.\r
                         \r
  @retval EFI_SUCCESS             The data was read correctly from the device.\r
  @retval EFI_DEVICE_ERROR        The device reported an error while attempting \r
                                  to perform the read operation.\r
  @retval EFI_INVALID_PARAMETER   The read request contains LBAs that are not \r
                                  valid, or the buffer is not properly aligned.\r
  @retval EFI_NO_MEDIA            There is no media in the device.\r
  @retval EFI_BAD_BUFFER_SIZE     The BufferSize parameter is not a multiple of\r
                                  the intrinsic block size of the device.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
AtapiReadBlocks (\r
  IN   EFI_PEI_SERVICES                  **PeiServices,\r
  IN   EFI_PEI_RECOVERY_BLOCK_IO_PPI     *This,\r
  IN   UINTN                             DeviceIndex,\r
  IN   EFI_PEI_LBA                       StartLBA,\r
  IN   UINTN                             BufferSize,\r
  OUT  VOID                              *Buffer\r
  );\r
\r
//\r
// Internal functions\r
//\r
\r
/**\r
  Enumerate Atapi devices.\r
\r
  This function is used to enumerate Atatpi device in Ide channel.\r
\r
  @param[in]  AtapiBlkIoDev  A pointer to atapi block IO device\r
\r
**/\r
VOID\r
AtapiEnumerateDevices (\r
  IN  ATAPI_BLK_IO_DEV  *AtapiBlkIoDev\r
  );\r
\r
/**\r
  Detect Atapi devices.\r
  \r
  @param[in]  AtapiBlkIoDev   A pointer to atapi block IO device.\r
  @param[in]  DevicePosition  An integer to signify device position.\r
  @param[out] MediaInfo       The media information of the specified block media.\r
\r
  @retval TRUE                Atapi device exists in specified position.\r
  @retval FALSE               Atapi device does not exist in specified position.\r
\r
**/\r
BOOLEAN\r
DiscoverAtapiDevice (\r
  IN  ATAPI_BLK_IO_DEV              *AtapiBlkIoDev,\r
  IN  UINTN                         DevicePosition,\r
  OUT EFI_PEI_BLOCK_IO_MEDIA        *MediaInfo\r
  );\r
\r
/**\r
  Detect if an IDE controller exists in specified position.\r
  \r
  @param[in]  AtapiBlkIoDev   A pointer to atapi block IO device.\r
  @param[in]  DevicePosition  An integer to signify device position.\r
\r
  @retval TRUE         The Atapi device exists.\r
  @retval FALSE        The Atapi device does not present.\r
\r
**/\r
BOOLEAN\r
DetectIDEController (\r
  IN  ATAPI_BLK_IO_DEV   *AtapiBlkIoDev,\r
  IN  UINTN              DevicePosition\r
  );\r
\r
/**\r
  Wait specified time interval to poll for BSY bit clear in the Status Register.\r
  \r
  @param[in]  AtapiBlkIoDev          A pointer to atapi block IO device.\r
  @param[in]  IdeIoRegisters         A pointer to IDE IO registers.\r
  @param[in]  TimeoutInMilliSeconds  Time specified in milliseconds.\r
\r
  @retval EFI_SUCCESS        BSY bit is cleared in the specified time interval.\r
  @retval EFI_TIMEOUT        BSY bit is not cleared in the specified time interval.\r
\r
**/\r
EFI_STATUS\r
WaitForBSYClear (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  IDE_BASE_REGISTERS  *IdeIoRegisters,\r
  IN  UINTN               TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Wait specified time interval to poll for DRDY bit set in the Status register.\r
  \r
  @param[in]  AtapiBlkIoDev          A pointer to atapi block IO device.\r
  @param[in]  IdeIoRegisters         A pointer to IDE IO registers.\r
  @param[in]  TimeoutInMilliSeconds  Time specified in milliseconds.\r
\r
  @retval EFI_SUCCESS        DRDY bit is set in the specified time interval.\r
  @retval EFI_TIMEOUT        DRDY bit is not set in the specified time interval.\r
\r
**/\r
EFI_STATUS\r
DRDYReady (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  IDE_BASE_REGISTERS  *IdeIoRegisters,\r
  IN  UINTN               TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Wait specified time interval to poll for DRQ bit clear in the Status Register.\r
  \r
  @param[in]  AtapiBlkIoDev          A pointer to atapi block IO device.\r
  @param[in]  IdeIoRegisters         A pointer to IDE IO registers.\r
  @param[in]  TimeoutInMilliSeconds  Time specified in milliseconds.\r
\r
  @retval EFI_SUCCESS        DRQ bit is cleared in the specified time interval.\r
  @retval EFI_TIMEOUT        DRQ bit is not cleared in the specified time interval.\r
\r
**/\r
EFI_STATUS\r
DRQClear (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  IDE_BASE_REGISTERS  *IdeIoRegisters,\r
  IN  UINTN               TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Wait specified time interval to poll for DRQ bit clear in the Alternate Status Register.\r
  \r
  @param[in]  AtapiBlkIoDev          A pointer to atapi block IO device.\r
  @param[in]  IdeIoRegisters         A pointer to IDE IO registers.\r
  @param[in]  TimeoutInMilliSeconds  Time specified in milliseconds.\r
\r
  @retval EFI_SUCCESS        DRQ bit is cleared in the specified time interval.\r
  @retval EFI_TIMEOUT        DRQ bit is not cleared in the specified time interval.\r
\r
**/\r
EFI_STATUS\r
DRQClear2 (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  IDE_BASE_REGISTERS  *IdeIoRegisters,\r
  IN  UINTN               TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Wait specified time interval to poll for DRQ bit set in the Status Register.\r
\r
  @param[in]  AtapiBlkIoDev          A pointer to atapi block IO device.\r
  @param[in]  IdeIoRegisters         A pointer to IDE IO registers.\r
  @param[in]  TimeoutInMilliSeconds  Time specified in milliseconds.\r
\r
  @retval EFI_SUCCESS        DRQ bit is set in the specified time interval.\r
  @retval EFI_TIMEOUT        DRQ bit is not set in the specified time interval.\r
  @retval EFI_ABORTED        Operation Aborted.\r
\r
**/\r
EFI_STATUS\r
DRQReady (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  IDE_BASE_REGISTERS  *IdeIoRegisters,\r
  IN  UINTN               TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Wait specified time interval to poll for DRQ bit set in the Alternate Status Register.\r
\r
  @param[in]  AtapiBlkIoDev          A pointer to atapi block IO device.\r
  @param[in]  IdeIoRegisters         A pointer to IDE IO registers.\r
  @param[in]  TimeoutInMilliSeconds  Time specified in milliseconds.\r
\r
  @retval EFI_SUCCESS        DRQ bit is set in the specified time interval.\r
  @retval EFI_TIMEOUT        DRQ bit is not set in the specified time interval.\r
  @retval EFI_ABORTED        Operation Aborted.\r
\r
**/\r
EFI_STATUS\r
DRQReady2 (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  IDE_BASE_REGISTERS  *IdeIoRegisters,\r
  IN  UINTN               TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Check if there is an error in Status Register.\r
\r
  @param[in]  AtapiBlkIoDev     A pointer to atapi block IO device.\r
  @param[in]  StatusReg         The address to IDE IO registers.\r
\r
  @retval EFI_SUCCESS        Operation success.\r
  @retval EFI_DEVICE_ERROR   Device error.\r
\r
**/\r
EFI_STATUS\r
CheckErrorStatus (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  UINT16              StatusReg\r
  );\r
\r
/**\r
  Idendify Atapi devices.\r
\r
  @param[in]  AtapiBlkIoDev     A pointer to atapi block IO device.\r
  @param[in]  DevicePosition    An integer to signify device position.\r
\r
  @retval EFI_SUCCESS        Identify successfully.\r
  @retval EFI_DEVICE_ERROR   Device cannot be identified successfully.\r
\r
**/\r
EFI_STATUS\r
ATAPIIdentify (\r
  IN  ATAPI_BLK_IO_DEV        *AtapiBlkIoDev,\r
  IN  UINTN                   DevicePosition\r
  );\r
\r
/**\r
  Sends out ATAPI Test Unit Ready Packet Command to the specified device\r
  to find out whether device is accessible.\r
\r
  @param[in]  AtapiBlkIoDev     A pointer to atapi block IO device.\r
  @param[in]  DevicePosition    An integer to signify device position.\r
\r
  @retval EFI_SUCCESS        TestUnit command executed successfully.\r
  @retval EFI_DEVICE_ERROR   Device cannot be executed TestUnit command successfully.\r
\r
**/\r
EFI_STATUS\r
TestUnitReady (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  UINTN               DevicePosition\r
  ) ;\r
\r
/**\r
  Send out ATAPI commands conforms to the Packet Command with PIO Data In Protocol.\r
  \r
  @param[in]  AtapiBlkIoDev         A pointer to atapi block IO device.\r
  @param[in]  DevicePosition        An integer to signify device position.\r
  @param[in]  Packet                A pointer to ATAPI command packet.\r
  @param[in]  Buffer                Buffer to contain requested transfer data from device.\r
  @param[in]  ByteCount             Requested transfer data length.\r
  @param[in]  TimeoutInMilliSeconds Time out value, in unit of milliseconds.\r
\r
  @retval EFI_SUCCESS        Command executed successfully.\r
  @retval EFI_DEVICE_ERROR   Device cannot be executed command successfully.\r
\r
**/\r
EFI_STATUS\r
AtapiPacketCommandIn (\r
  IN  ATAPI_BLK_IO_DEV      *AtapiBlkIoDev,\r
  IN  UINTN                 DevicePosition,\r
  IN  ATAPI_PACKET_COMMAND  *Packet,\r
  IN  UINT16                *Buffer,\r
  IN  UINT32                ByteCount,\r
  IN  UINTN                 TimeoutInMilliSeconds\r
  );\r
\r
/**\r
  Sends out ATAPI Inquiry Packet Command to the specified device.\r
  This command will return INQUIRY data of the device.\r
\r
  @param[in]  AtapiBlkIoDev   A pointer to atapi block IO device.\r
  @param[in]  DevicePosition  An integer to signify device position.\r
  @param[out] MediaInfo       The media information of the specified block media.\r
\r
  @retval EFI_SUCCESS        Command executed successfully.\r
  @retval EFI_DEVICE_ERROR   Device cannot be executed command successfully.\r
  @retval EFI_UNSUPPORTED    Unsupported device type.\r
\r
**/\r
EFI_STATUS\r
Inquiry (\r
  IN  ATAPI_BLK_IO_DEV              *AtapiBlkIoDev,\r
  IN  UINTN                         DevicePosition,\r
  OUT EFI_PEI_BLOCK_IO_MEDIA        *MediaInfo\r
  );\r
\r
/**  \r
  Used before read/write blocks from/to ATAPI device media. \r
  Since ATAPI device media is removable, it is necessary to detect\r
  whether media is present and get current present media's information.  \r
\r
  @param[in]  AtapiBlkIoDev     A pointer to atapi block IO device.\r
  @param[in]  DevicePosition    An integer to signify device position.\r
  @param[in, out] MediaInfo         The media information of the specified block media.\r
\r
  @retval EFI_SUCCESS           Command executed successfully.\r
  @retval EFI_DEVICE_ERROR      Some device errors happen.\r
  @retval EFI_OUT_OF_RESOURCES  Can not allocate required resources.\r
\r
**/\r
EFI_STATUS\r
DetectMedia (\r
  IN  ATAPI_BLK_IO_DEV              *AtapiBlkIoDev,\r
  IN  UINTN                         DevicePosition,\r
  IN OUT EFI_PEI_BLOCK_IO_MEDIA     *MediaInfo\r
  );\r
\r
/**  \r
  Reset specified Atapi device.\r
\r
  @param[in]  AtapiBlkIoDev     A pointer to atapi block IO device.\r
  @param[in]  DevicePosition    An integer to signify device position.\r
  @param[in]  Extensive         If TRUE, use ATA soft reset, otherwise use Atapi soft reset.\r
\r
  @retval EFI_SUCCESS           Command executed successfully.\r
  @retval EFI_DEVICE_ERROR      Some device errors happen.\r
\r
**/\r
EFI_STATUS\r
ResetDevice (\r
  IN  ATAPI_BLK_IO_DEV  *AtapiBlkIoDev,\r
  IN  UINTN             DevicePosition,\r
  IN  BOOLEAN           Extensive\r
  );\r
\r
/**  \r
  Sends out ATAPI Request Sense Packet Command to the specified device.\r
\r
  @param[in]      AtapiBlkIoDev   A pointer to atapi block IO device.\r
  @param[in]      DevicePosition  An integer to signify device position.\r
  @param[in]      SenseBuffers    Pointer to sense buffer.\r
  @param[in, out] SenseCounts     Length of sense buffer.\r
\r
  @retval EFI_SUCCESS           Command executed successfully.\r
  @retval EFI_DEVICE_ERROR      Some device errors happen.\r
\r
**/\r
EFI_STATUS\r
RequestSense (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  UINTN               DevicePosition,\r
  IN  ATAPI_REQUEST_SENSE_DATA  *SenseBuffers,\r
  IN OUT  UINT8           *SenseCounts\r
  );\r
\r
/**  \r
  Sends out ATAPI Read Capacity Packet Command to the specified device.\r
  This command will return the information regarding the capacity of the\r
  media in the device.\r
\r
  @param[in]  AtapiBlkIoDev   A pointer to atapi block IO device.\r
  @param[in]  DevicePosition  An integer to signify device position.\r
  @param[in, out] MediaInfo       The media information of the specified block media.\r
\r
  @retval EFI_SUCCESS           Command executed successfully.\r
  @retval EFI_DEVICE_ERROR      Some device errors happen.\r
\r
**/\r
EFI_STATUS\r
ReadCapacity (\r
  IN  ATAPI_BLK_IO_DEV              *AtapiBlkIoDev,\r
  IN  UINTN                         DevicePosition,\r
  IN OUT EFI_PEI_BLOCK_IO_MEDIA     *MediaInfo\r
  );\r
\r
/**  \r
  Perform read from disk in block unit.\r
\r
  @param[in]  AtapiBlkIoDev   A pointer to atapi block IO device.\r
  @param[in]  DevicePosition  An integer to signify device position.\r
  @param[in]  Buffer          Buffer to contain read data.\r
  @param[in]  StartLba        Starting LBA address.\r
  @param[in]  NumberOfBlocks  Number of blocks to read.\r
  @param[in]  BlockSize       Size of each block.\r
\r
  @retval EFI_SUCCESS           Command executed successfully.\r
  @retval EFI_DEVICE_ERROR      Some device errors happen.\r
\r
**/\r
EFI_STATUS\r
ReadSectors (\r
  IN  ATAPI_BLK_IO_DEV    *AtapiBlkIoDev,\r
  IN  UINTN               DevicePosition,\r
  IN  VOID                *Buffer,\r
  IN  EFI_PEI_LBA         StartLba,\r
  IN  UINTN               NumberOfBlocks,\r
  IN  UINTN               BlockSize\r
  );\r
\r
/**  \r
  Check if there is media according to sense data.\r
\r
  @param[in]  SenseData   Pointer to sense data.\r
  @param[in]  SenseCounts Count of sense data.\r
\r
  @retval TRUE    No media\r
  @retval FALSE   Media exists\r
\r
**/\r
BOOLEAN\r
IsNoMedia (\r
  IN  ATAPI_REQUEST_SENSE_DATA    *SenseData,\r
  IN  UINTN                 SenseCounts\r
  );\r
\r
/**  \r
  Check if device state is unclear according to sense data.\r
\r
  @param[in]  SenseData   Pointer to sense data.\r
  @param[in]  SenseCounts Count of sense data.\r
\r
  @retval TRUE    Device state is unclear\r
  @retval FALSE   Device state is clear  \r
\r
**/\r
BOOLEAN\r
IsDeviceStateUnclear (\r
  IN  ATAPI_REQUEST_SENSE_DATA    *SenseData,\r
  IN  UINTN                 SenseCounts\r
  );\r
\r
/**  \r
  Check if there is media error according to sense data.\r
\r
  @param[in]  SenseData   Pointer to sense data.\r
  @param[in]  SenseCounts Count of sense data.\r
\r
  @retval TRUE    Media error\r
  @retval FALSE   No media error\r
\r
**/\r
BOOLEAN\r
IsMediaError (\r
  IN  ATAPI_REQUEST_SENSE_DATA    *SenseData,\r
  IN  UINTN                 SenseCounts\r
  );\r
\r
/**  \r
  Check if drive is ready according to sense data.\r
\r
  @param[in]  SenseData   Pointer to sense data.\r
  @param[in]  SenseCounts Count of sense data.\r
  @param[out] NeedRetry   Indicate if retry is needed.\r
\r
  @retval TRUE    Drive ready\r
  @retval FALSE   Drive not ready\r
\r
**/\r
BOOLEAN\r
IsDriveReady (\r
  IN  ATAPI_REQUEST_SENSE_DATA    *SenseData,\r
  IN  UINTN                 SenseCounts,\r
  OUT BOOLEAN               *NeedRetry\r
  );\r
\r
#endif\r