MdePkg/Include/Protocol/AtaPassThru.h

   1 /** @file
   2   The EFI_ATA_PASS_THRU_PROTOCOL provides information about an ATA controller and the ability
   3   to send ATA Command Blocks to any ATA device attached to that ATA controller. The information
   4   includes the attributes of the ATA controller.
   5
   6   Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9   @par Revision Reference:
  10   This Protocol was introduced in UEFI Specification 2.3.
  11
  12 **/
  13
  14 #ifndef __ATA_PASS_THROUGH_H__
  15 #define __ATA_PASS_THROUGH_H__
  16
  17 #define EFI_ATA_PASS_THRU_PROTOCOL_GUID \
  18   { \
  19     0x1d3de7f0, 0x807, 0x424f, {0xaa, 0x69, 0x11, 0xa5, 0x4e, 0x19, 0xa4, 0x6f } \
  20   }
  21
  22 typedef struct _EFI_ATA_PASS_THRU_PROTOCOL EFI_ATA_PASS_THRU_PROTOCOL;
  23
  24 typedef struct {
  25   UINT32    Attributes;
  26   UINT32    IoAlign;
  27 } EFI_ATA_PASS_THRU_MODE;
  28
  29 ///
  30 /// If this bit is set, then the EFI_ATA_PASS_THRU_PROTOCOL interface is for physical
  31 /// devices on the ATA controller.
  32 ///
  33 #define EFI_ATA_PASS_THRU_ATTRIBUTES_PHYSICAL  0x0001
  34 ///
  35 /// If this bit is set, then the EFI_ATA_PASS_THRU_PROTOCOL interface is for logical
  36 /// devices on the ATA controller.
  37 ///
  38 #define EFI_ATA_PASS_THRU_ATTRIBUTES_LOGICAL  0x0002
  39 ///
  40 /// If this bit is set, then the EFI_ATA_PASS_THRU_PROTOCOL interface supports non blocking
  41 /// I/O. Every EFI_ATA_PASS_THRU_PROTOCOL must support blocking I/O. The support of non-blocking
  42 /// I/O is optional.
  43 ///
  44 #define EFI_ATA_PASS_THRU_ATTRIBUTES_NONBLOCKIO  0x0004
  45
  46 typedef struct _EFI_ATA_COMMAND_BLOCK {
  47   UINT8    Reserved1[2];
  48   UINT8    AtaCommand;
  49   UINT8    AtaFeatures;
  50   UINT8    AtaSectorNumber;
  51   UINT8    AtaCylinderLow;
  52   UINT8    AtaCylinderHigh;
  53   UINT8    AtaDeviceHead;
  54   UINT8    AtaSectorNumberExp;
  55   UINT8    AtaCylinderLowExp;
  56   UINT8    AtaCylinderHighExp;
  57   UINT8    AtaFeaturesExp;
  58   UINT8    AtaSectorCount;
  59   UINT8    AtaSectorCountExp;
  60   UINT8    Reserved2[6];
  61 } EFI_ATA_COMMAND_BLOCK;
  62
  63 typedef struct _EFI_ATA_STATUS_BLOCK {
  64   UINT8    Reserved1[2];
  65   UINT8    AtaStatus;
  66   UINT8    AtaError;
  67   UINT8    AtaSectorNumber;
  68   UINT8    AtaCylinderLow;
  69   UINT8    AtaCylinderHigh;
  70   UINT8    AtaDeviceHead;
  71   UINT8    AtaSectorNumberExp;
  72   UINT8    AtaCylinderLowExp;
  73   UINT8    AtaCylinderHighExp;
  74   UINT8    Reserved2;
  75   UINT8    AtaSectorCount;
  76   UINT8    AtaSectorCountExp;
  77   UINT8    Reserved3[6];
  78 } EFI_ATA_STATUS_BLOCK;
  79
  80 typedef UINT8 EFI_ATA_PASS_THRU_CMD_PROTOCOL;
  81
  82 #define EFI_ATA_PASS_THRU_PROTOCOL_ATA_HARDWARE_RESET  0x00
  83 #define EFI_ATA_PASS_THRU_PROTOCOL_ATA_SOFTWARE_RESET  0x01
  84 #define EFI_ATA_PASS_THRU_PROTOCOL_ATA_NON_DATA        0x02
  85 #define EFI_ATA_PASS_THRU_PROTOCOL_PIO_DATA_IN         0x04
  86 #define EFI_ATA_PASS_THRU_PROTOCOL_PIO_DATA_OUT        0x05
  87 #define EFI_ATA_PASS_THRU_PROTOCOL_DMA                 0x06
  88 #define EFI_ATA_PASS_THRU_PROTOCOL_DMA_QUEUED          0x07
  89 #define EFI_ATA_PASS_THRU_PROTOCOL_DEVICE_DIAGNOSTIC   0x08
  90 #define EFI_ATA_PASS_THRU_PROTOCOL_DEVICE_RESET        0x09
  91 #define EFI_ATA_PASS_THRU_PROTOCOL_UDMA_DATA_IN        0x0A
  92 #define EFI_ATA_PASS_THRU_PROTOCOL_UDMA_DATA_OUT       0x0B
  93 #define EFI_ATA_PASS_THRU_PROTOCOL_FPDMA               0x0C
  94 #define EFI_ATA_PASS_THRU_PROTOCOL_RETURN_RESPONSE     0xFF
  95
  96 typedef UINT8 EFI_ATA_PASS_THRU_LENGTH;
  97
  98 #define EFI_ATA_PASS_THRU_LENGTH_BYTES  0x80
  99
 100 #define EFI_ATA_PASS_THRU_LENGTH_MASK              0x70
 101 #define EFI_ATA_PASS_THRU_LENGTH_NO_DATA_TRANSFER  0x00
 102 #define EFI_ATA_PASS_THRU_LENGTH_FEATURES          0x10
 103 #define EFI_ATA_PASS_THRU_LENGTH_SECTOR_COUNT      0x20
 104 #define EFI_ATA_PASS_THRU_LENGTH_TPSIU             0x30
 105
 106 #define EFI_ATA_PASS_THRU_LENGTH_COUNT  0x0F
 107
 108 typedef struct {
 109   ///
 110   /// A pointer to the sense data that was generated by the execution of the ATA
 111   /// command. It must be aligned to the boundary specified in the IoAlign field
 112   /// in the EFI_ATA_PASS_THRU_MODE structure.
 113   ///
 114   EFI_ATA_STATUS_BLOCK              *Asb;
 115   ///
 116   /// A pointer to buffer that contains the Command Data Block to send to the ATA
 117   /// device specified by Port and PortMultiplierPort.
 118   ///
 119   EFI_ATA_COMMAND_BLOCK             *Acb;
 120   ///
 121   /// The timeout, in 100 ns units, to use for the execution of this ATA command.
 122   /// A Timeout value of 0 means that this function will wait indefinitely for the
 123   /// ATA command to execute. If Timeout is greater than zero, then this function
 124   /// will return EFI_TIMEOUT if the time required to execute the ATA command is
 125   /// greater than Timeout.
 126   ///
 127   UINT64                            Timeout;
 128   ///
 129   /// A pointer to the data buffer to transfer between the ATA controller and the
 130   /// ATA device for read and bidirectional commands. For all write and non data
 131   /// commands where InTransferLength is 0 this field is optional and may be NULL.
 132   /// If this field is not NULL, then it must be aligned on the boundary specified
 133   /// by the IoAlign field in the EFI_ATA_PASS_THRU_MODE structure.
 134   ///
 135   VOID                              *InDataBuffer;
 136   ///
 137   /// A pointer to the data buffer to transfer between the ATA controller and the
 138   /// ATA device for write or bidirectional commands. For all read and non data
 139   /// commands where OutTransferLength is 0 this field is optional and may be NULL.
 140   /// If this field is not NULL, then it must be aligned on the boundary specified
 141   /// by the IoAlign field in the EFI_ATA_PASS_THRU_MODE structure.
 142   ///
 143   VOID                              *OutDataBuffer;
 144   ///
 145   /// On input, the size, in bytes, of InDataBuffer. On output, the number of bytes
 146   /// transferred between the ATA controller and the ATA device. If InTransferLength
 147   /// is larger than the ATA controller can handle, no data will be transferred,
 148   /// InTransferLength will be updated to contain the number of bytes that the ATA
 149   /// controller is able to transfer, and EFI_BAD_BUFFER_SIZE will be returned.
 150   ///
 151   UINT32                            InTransferLength;
 152   ///
 153   /// On Input, the size, in bytes of OutDataBuffer. On Output, the Number of bytes
 154   /// transferred between ATA Controller and the ATA device. If OutTransferLength is
 155   /// larger than the ATA controller can handle, no data will be transferred,
 156   /// OutTransferLength will be updated to contain the number of bytes that the ATA
 157   /// controller is able to transfer, and EFI_BAD_BUFFER_SIZE will be returned.
 158   ///
 159   UINT32                            OutTransferLength;
 160   ///
 161   /// Specifies the protocol used when the ATA device executes the command.
 162   ///
 163   EFI_ATA_PASS_THRU_CMD_PROTOCOL    Protocol;
 164   ///
 165   /// Specifies the way in which the ATA command length is encoded.
 166   ///
 167   EFI_ATA_PASS_THRU_LENGTH          Length;
 168 } EFI_ATA_PASS_THRU_COMMAND_PACKET;
 169
 170 /**
 171   Sends an ATA command to an ATA device that is attached to the ATA controller. This function
 172   supports both blocking I/O and non-blocking I/O. The blocking I/O functionality is required,
 173   and the non-blocking I/O functionality is optional.
 174
 175   @param[in]     This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 176   @param[in]     Port                The port number of the ATA device to send the command.
 177   @param[in]     PortMultiplierPort  The port multiplier port number of the ATA device to send the command.
 178                                      If there is no port multiplier, then specify 0xFFFF.
 179   @param[in,out] Packet              A pointer to the ATA command to send to the ATA device specified by Port
 180                                      and PortMultiplierPort.
 181   @param[in]     Event               If non-blocking I/O is not supported then Event is ignored, and blocking
 182                                      I/O is performed. If Event is NULL, then blocking I/O is performed. If
 183                                      Event is not NULL and non blocking I/O is supported, then non-blocking
 184                                      I/O is performed, and Event will be signaled when the ATA command completes.
 185
 186   @retval EFI_SUCCESS                The ATA command was sent by the host. For bi-directional commands,
 187                                      InTransferLength bytes were transferred from InDataBuffer. For write and
 188                                      bi-directional commands, OutTransferLength bytes were transferred by OutDataBuffer.
 189   @retval EFI_BAD_BUFFER_SIZE        The ATA command was not executed. The number of bytes that could be transferred
 190                                      is returned in InTransferLength. For write and bi-directional commands,
 191                                      OutTransferLength bytes were transferred by OutDataBuffer.
 192   @retval EFI_NOT_READY              The ATA command could not be sent because there are too many ATA commands
 193                                      already queued. The caller may retry again later.
 194   @retval EFI_DEVICE_ERROR           A device error occurred while attempting to send the ATA command.
 195   @retval EFI_INVALID_PARAMETER      Port, PortMultiplierPort, or the contents of Acb are invalid. The ATA
 196                                      command was not sent, so no additional status information is available.
 197
 198 **/
 199 typedef
 200 EFI_STATUS
 201 (EFIAPI *EFI_ATA_PASS_THRU_PASSTHRU)(
 202   IN     EFI_ATA_PASS_THRU_PROTOCOL       *This,
 203   IN     UINT16                           Port,
 204   IN     UINT16                           PortMultiplierPort,
 205   IN OUT EFI_ATA_PASS_THRU_COMMAND_PACKET *Packet,
 206   IN     EFI_EVENT                        Event OPTIONAL
 207   );
 208
 209 /**
 210   Used to retrieve the list of legal port numbers for ATA devices on an ATA controller.
 211   These can either be the list of ports where ATA devices are actually present or the
 212   list of legal port numbers for the ATA controller. Regardless, the caller of this
 213   function must probe the port number returned to see if an ATA device is actually
 214   present at that location on the ATA controller.
 215
 216   The GetNextPort() function retrieves the port number on an ATA controller. If on input
 217   Port is 0xFFFF, then the port number of the first port on the ATA controller is returned
 218   in Port and EFI_SUCCESS is returned.
 219
 220   If Port is a port number that was returned on a previous call to GetNextPort(), then the
 221   port number of the next port on the ATA controller is returned in Port, and EFI_SUCCESS
 222   is returned. If Port is not 0xFFFF and Port was not returned on a previous call to
 223   GetNextPort(), then EFI_INVALID_PARAMETER is returned.
 224
 225   If Port is the port number of the last port on the ATA controller, then EFI_NOT_FOUND is
 226   returned.
 227
 228   @param[in]     This           A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 229   @param[in,out] Port           On input, a pointer to the port number on the ATA controller.
 230                                 On output, a pointer to the next port number on the ATA
 231                                 controller. An input value of 0xFFFF retrieves the first port
 232                                 number on the ATA controller.
 233
 234   @retval EFI_SUCCESS           The next port number on the ATA controller was returned in Port.
 235   @retval EFI_NOT_FOUND         There are no more ports on this ATA controller.
 236   @retval EFI_INVALID_PARAMETER Port is not 0xFFFF and Port was not returned on a previous call
 237                                 to GetNextPort().
 238
 239 **/
 240 typedef
 241 EFI_STATUS
 242 (EFIAPI *EFI_ATA_PASS_THRU_GET_NEXT_PORT)(
 243   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 244   IN OUT UINT16                 *Port
 245   );
 246
 247 /**
 248   Used to retrieve the list of legal port multiplier port numbers for ATA devices on a port of an ATA
 249   controller. These can either be the list of port multiplier ports where ATA devices are actually
 250   present on port or the list of legal port multiplier ports on that port. Regardless, the caller of this
 251   function must probe the port number and port multiplier port number returned to see if an ATA
 252   device is actually present.
 253
 254   The GetNextDevice() function retrieves the port multiplier port number of an ATA device
 255   present on a port of an ATA controller.
 256
 257   If PortMultiplierPort points to a port multiplier port number value that was returned on a
 258   previous call to GetNextDevice(), then the port multiplier port number of the next ATA device
 259   on the port of the ATA controller is returned in PortMultiplierPort, and EFI_SUCCESS is
 260   returned.
 261
 262   If PortMultiplierPort points to 0xFFFF, then the port multiplier port number of the first
 263   ATA device on port of the ATA controller is returned in PortMultiplierPort and
 264   EFI_SUCCESS is returned.
 265
 266   If PortMultiplierPort is not 0xFFFF and the value pointed to by PortMultiplierPort
 267   was not returned on a previous call to GetNextDevice(), then EFI_INVALID_PARAMETER
 268   is returned.
 269
 270   If PortMultiplierPort is the port multiplier port number of the last ATA device on the port of
 271   the ATA controller, then EFI_NOT_FOUND is returned.
 272
 273   @param[in]     This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 274   @param[in]     Port                The port number present on the ATA controller.
 275   @param[in,out] PortMultiplierPort  On input, a pointer to the port multiplier port number of an
 276                                      ATA device present on the ATA controller.
 277                                      If on input a PortMultiplierPort of 0xFFFF is specified,
 278                                      then the port multiplier port number of the first ATA device
 279                                      is returned. On output, a pointer to the port multiplier port
 280                                      number of the next ATA device present on an ATA controller.
 281
 282   @retval EFI_SUCCESS                The port multiplier port number of the next ATA device on the port
 283                                      of the ATA controller was returned in PortMultiplierPort.
 284   @retval EFI_NOT_FOUND              There are no more ATA devices on this port of the ATA controller.
 285   @retval EFI_INVALID_PARAMETER      PortMultiplierPort is not 0xFFFF, and PortMultiplierPort was not
 286                                      returned on a previous call to GetNextDevice().
 287
 288 **/
 289 typedef
 290 EFI_STATUS
 291 (EFIAPI *EFI_ATA_PASS_THRU_GET_NEXT_DEVICE)(
 292   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 293   IN UINT16                     Port,
 294   IN OUT UINT16                 *PortMultiplierPort
 295   );
 296
 297 /**
 298   Used to allocate and build a device path node for an ATA device on an ATA controller.
 299
 300   The BuildDevicePath() function allocates and builds a single device node for the ATA
 301   device specified by Port and PortMultiplierPort. If the ATA device specified by Port and
 302   PortMultiplierPort is not present on the ATA controller, then EFI_NOT_FOUND is returned.
 303   If DevicePath is NULL, then EFI_INVALID_PARAMETER is returned. If there are not enough
 304   resources to allocate the device path node, then EFI_OUT_OF_RESOURCES is returned.
 305
 306   Otherwise, DevicePath is allocated with the boot service AllocatePool(), the contents of
 307   DevicePath are initialized to describe the ATA device specified by Port and PortMultiplierPort,
 308   and EFI_SUCCESS is returned.
 309
 310   @param[in]     This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 311   @param[in]     Port                Port specifies the port number of the ATA device for which a
 312                                      device path node is to be allocated and built.
 313   @param[in]     PortMultiplierPort  The port multiplier port number of the ATA device for which a
 314                                      device path node is to be allocated and built. If there is no
 315                                      port multiplier, then specify 0xFFFF.
 316   @param[out]    DevicePath          A pointer to a single device path node that describes the ATA
 317                                      device specified by Port and PortMultiplierPort. This function
 318                                      is responsible for allocating the buffer DevicePath with the
 319                                      boot service AllocatePool(). It is the caller's responsibility
 320                                      to free DevicePath when the caller is finished with DevicePath.
 321   @retval EFI_SUCCESS                The device path node that describes the ATA device specified by
 322                                      Port and PortMultiplierPort was allocated and returned in DevicePath.
 323   @retval EFI_NOT_FOUND              The ATA device specified by Port and PortMultiplierPort does not
 324                                      exist on the ATA controller.
 325   @retval EFI_INVALID_PARAMETER      DevicePath is NULL.
 326   @retval EFI_OUT_OF_RESOURCES       There are not enough resources to allocate DevicePath.
 327
 328 **/
 329 typedef
 330 EFI_STATUS
 331 (EFIAPI *EFI_ATA_PASS_THRU_BUILD_DEVICE_PATH)(
 332   IN     EFI_ATA_PASS_THRU_PROTOCOL *This,
 333   IN     UINT16                     Port,
 334   IN     UINT16                     PortMultiplierPort,
 335   OUT    EFI_DEVICE_PATH_PROTOCOL   **DevicePath
 336   );
 337
 338 /**
 339   Used to translate a device path node to a port number and port multiplier port number.
 340
 341   The GetDevice() function determines the port and port multiplier port number associated with
 342   the ATA device described by DevicePath. If DevicePath is a device path node type that the
 343   ATA Pass Thru driver supports, then the ATA Pass Thru driver will attempt to translate the contents
 344   DevicePath into a port number and port multiplier port number.
 345
 346   If this translation is successful, then that port number and port multiplier port number are returned
 347   in Port and PortMultiplierPort, and EFI_SUCCESS is returned.
 348
 349   If DevicePath, Port, or PortMultiplierPort are NULL, then EFI_INVALID_PARAMETER is returned.
 350
 351   If DevicePath is not a device path node type that the ATA Pass Thru driver supports, then
 352   EFI_UNSUPPORTED is returned.
 353
 354   If DevicePath is a device path node type that the ATA Pass Thru driver supports, but there is not
 355   a valid translation from DevicePath to a port number and port multiplier port number, then
 356   EFI_NOT_FOUND is returned.
 357
 358   @param[in]  This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 359   @param[in]  DevicePath          A pointer to the device path node that describes an ATA device on the
 360                                   ATA controller.
 361   @param[out] Port                On return, points to the port number of an ATA device on the ATA controller.
 362   @param[out] PortMultiplierPort  On return, points to the port multiplier port number of an ATA device
 363                                   on the ATA controller.
 364
 365   @retval EFI_SUCCESS             DevicePath was successfully translated to a port number and port multiplier
 366                                   port number, and they were returned in Port and PortMultiplierPort.
 367   @retval EFI_INVALID_PARAMETER   DevicePath is NULL.
 368   @retval EFI_INVALID_PARAMETER   Port is NULL.
 369   @retval EFI_INVALID_PARAMETER   PortMultiplierPort is NULL.
 370   @retval EFI_UNSUPPORTED         This driver does not support the device path node type in DevicePath.
 371   @retval EFI_NOT_FOUND           A valid translation from DevicePath to a port number and port multiplier
 372                                   port number does not exist.
 373 **/
 374 typedef
 375 EFI_STATUS
 376 (EFIAPI *EFI_ATA_PASS_THRU_GET_DEVICE)(
 377   IN  EFI_ATA_PASS_THRU_PROTOCOL *This,
 378   IN  EFI_DEVICE_PATH_PROTOCOL   *DevicePath,
 379   OUT UINT16                     *Port,
 380   OUT UINT16                     *PortMultiplierPort
 381   );
 382
 383 /**
 384   Resets a specific port on the ATA controller. This operation also resets all the ATA devices
 385   connected to the port.
 386
 387   The ResetChannel() function resets an a specific port on an ATA controller. This operation
 388   resets all the ATA devices connected to that port. If this ATA controller does not support
 389   a reset port operation, then EFI_UNSUPPORTED is returned.
 390
 391   If a device error occurs while executing that port reset operation, then EFI_DEVICE_ERROR is
 392   returned.
 393
 394   If a timeout occurs during the execution of the port reset operation, then EFI_TIMEOUT is returned.
 395
 396   If the port reset operation is completed, then EFI_SUCCESS is returned.
 397
 398   @param[in]  This          A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 399   @param[in]  Port          The port number on the ATA controller.
 400
 401   @retval EFI_SUCCESS       The ATA controller port was reset.
 402   @retval EFI_UNSUPPORTED   The ATA controller does not support a port reset operation.
 403   @retval EFI_DEVICE_ERROR  A device error occurred while attempting to reset the ATA port.
 404   @retval EFI_TIMEOUT       A timeout occurred while attempting to reset the ATA port.
 405
 406 **/
 407 typedef
 408 EFI_STATUS
 409 (EFIAPI *EFI_ATA_PASS_THRU_RESET_PORT)(
 410   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 411   IN UINT16                     Port
 412   );
 413
 414 /**
 415   Resets an ATA device that is connected to an ATA controller.
 416
 417   The ResetDevice() function resets the ATA device specified by Port and PortMultiplierPort.
 418   If this ATA controller does not support a device reset operation, then EFI_UNSUPPORTED is
 419   returned.
 420
 421   If Port or PortMultiplierPort are not in a valid range for this ATA controller, then
 422   EFI_INVALID_PARAMETER is returned.
 423
 424   If a device error occurs while executing that device reset operation, then EFI_DEVICE_ERROR
 425   is returned.
 426
 427   If a timeout occurs during the execution of the device reset operation, then EFI_TIMEOUT is
 428   returned.
 429
 430   If the device reset operation is completed, then EFI_SUCCESS is returned.
 431
 432   @param[in] This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 433   @param[in] Port                Port represents the port number of the ATA device to be reset.
 434   @param[in] PortMultiplierPort  The port multiplier port number of the ATA device to reset.
 435                                  If there is no port multiplier, then specify 0xFFFF.
 436   @retval EFI_SUCCESS            The ATA device specified by Port and PortMultiplierPort was reset.
 437   @retval EFI_UNSUPPORTED        The ATA controller does not support a device reset operation.
 438   @retval EFI_INVALID_PARAMETER  Port or PortMultiplierPort are invalid.
 439   @retval EFI_DEVICE_ERROR       A device error occurred while attempting to reset the ATA device
 440                                  specified by Port and PortMultiplierPort.
 441   @retval EFI_TIMEOUT            A timeout occurred while attempting to reset the ATA device
 442                                  specified by Port and PortMultiplierPort.
 443
 444 **/
 445 typedef
 446 EFI_STATUS
 447 (EFIAPI *EFI_ATA_PASS_THRU_RESET_DEVICE)(
 448   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 449   IN UINT16                     Port,
 450   IN UINT16                     PortMultiplierPort
 451   );
 452
 453 struct _EFI_ATA_PASS_THRU_PROTOCOL {
 454   EFI_ATA_PASS_THRU_MODE                 *Mode;
 455   EFI_ATA_PASS_THRU_PASSTHRU             PassThru;
 456   EFI_ATA_PASS_THRU_GET_NEXT_PORT        GetNextPort;
 457   EFI_ATA_PASS_THRU_GET_NEXT_DEVICE      GetNextDevice;
 458   EFI_ATA_PASS_THRU_BUILD_DEVICE_PATH    BuildDevicePath;
 459   EFI_ATA_PASS_THRU_GET_DEVICE           GetDevice;
 460   EFI_ATA_PASS_THRU_RESET_PORT           ResetPort;
 461   EFI_ATA_PASS_THRU_RESET_DEVICE         ResetDevice;
 462 };
 463
 464 extern EFI_GUID  gEfiAtaPassThruProtocolGuid;
 465
 466 #endif