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
 101 #define EFI_ATA_PASS_THRU_LENGTH_MASK                 0x70
 102 #define EFI_ATA_PASS_THRU_LENGTH_NO_DATA_TRANSFER     0x00
 103 #define EFI_ATA_PASS_THRU_LENGTH_FEATURES             0x10
 104 #define EFI_ATA_PASS_THRU_LENGTH_SECTOR_COUNT         0x20
 105 #define EFI_ATA_PASS_THRU_LENGTH_TPSIU                0x30
 106
 107 #define EFI_ATA_PASS_THRU_LENGTH_COUNT                0x0F
 108
 109 typedef struct {
 110   ///
 111   /// A pointer to the sense data that was generated by the execution of the ATA
 112   /// command. It must be aligned to the boundary specified in the IoAlign field
 113   /// in the EFI_ATA_PASS_THRU_MODE structure.
 114   ///
 115   EFI_ATA_STATUS_BLOCK           *Asb;
 116   ///
 117   /// A pointer to buffer that contains the Command Data Block to send to the ATA
 118   /// device specified by Port and PortMultiplierPort.
 119   ///
 120   EFI_ATA_COMMAND_BLOCK          *Acb;
 121   ///
 122   /// The timeout, in 100 ns units, to use for the execution of this ATA command.
 123   /// A Timeout value of 0 means that this function will wait indefinitely for the
 124   /// ATA command to execute. If Timeout is greater than zero, then this function
 125   /// will return EFI_TIMEOUT if the time required to execute the ATA command is
 126   /// greater than Timeout.
 127   ///
 128   UINT64                         Timeout;
 129   ///
 130   /// A pointer to the data buffer to transfer between the ATA controller and the
 131   /// ATA device for read and bidirectional commands. For all write and non data
 132   /// commands where InTransferLength is 0 this field is optional and may be NULL.
 133   /// If this field is not NULL, then it must be aligned on the boundary specified
 134   /// by the IoAlign field in the EFI_ATA_PASS_THRU_MODE structure.
 135   ///
 136   VOID                           *InDataBuffer;
 137   ///
 138   /// A pointer to the data buffer to transfer between the ATA controller and the
 139   /// ATA device for write or bidirectional commands. For all read and non data
 140   /// commands where OutTransferLength is 0 this field is optional and may be NULL.
 141   /// If this field is not NULL, then it must be aligned on the boundary specified
 142   /// by the IoAlign field in the EFI_ATA_PASS_THRU_MODE structure.
 143   ///
 144   VOID                           *OutDataBuffer;
 145   ///
 146   /// On input, the size, in bytes, of InDataBuffer. On output, the number of bytes
 147   /// transferred between the ATA controller and the ATA device. If InTransferLength
 148   /// is larger than the ATA controller can handle, no data will be transferred,
 149   /// InTransferLength will be updated to contain the number of bytes that the ATA
 150   /// controller is able to transfer, and EFI_BAD_BUFFER_SIZE will be returned.
 151   ///
 152   UINT32                         InTransferLength;
 153   ///
 154   /// On Input, the size, in bytes of OutDataBuffer. On Output, the Number of bytes
 155   /// transferred between ATA Controller and the ATA device. If OutTransferLength is
 156   /// larger than the ATA controller can handle, no data will be transferred,
 157   /// OutTransferLength will be updated to contain the number of bytes that the ATA
 158   /// controller is able to transfer, and EFI_BAD_BUFFER_SIZE will be returned.
 159   ///
 160   UINT32                         OutTransferLength;
 161   ///
 162   /// Specifies the protocol used when the ATA device executes the command.
 163   ///
 164   EFI_ATA_PASS_THRU_CMD_PROTOCOL Protocol;
 165   ///
 166   /// Specifies the way in which the ATA command length is encoded.
 167   ///
 168   EFI_ATA_PASS_THRU_LENGTH       Length;
 169 } EFI_ATA_PASS_THRU_COMMAND_PACKET;
 170
 171
 172 /**
 173   Sends an ATA command to an ATA device that is attached to the ATA controller. This function
 174   supports both blocking I/O and non-blocking I/O. The blocking I/O functionality is required,
 175   and the non-blocking I/O functionality is optional.
 176
 177   @param[in]     This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 178   @param[in]     Port                The port number of the ATA device to send the command.
 179   @param[in]     PortMultiplierPort  The port multiplier port number of the ATA device to send the command.
 180                                      If there is no port multiplier, then specify 0xFFFF.
 181   @param[in,out] Packet              A pointer to the ATA command to send to the ATA device specified by Port
 182                                      and PortMultiplierPort.
 183   @param[in]     Event               If non-blocking I/O is not supported then Event is ignored, and blocking
 184                                      I/O is performed. If Event is NULL, then blocking I/O is performed. If
 185                                      Event is not NULL and non blocking I/O is supported, then non-blocking
 186                                      I/O is performed, and Event will be signaled when the ATA command completes.
 187
 188   @retval EFI_SUCCESS                The ATA command was sent by the host. For bi-directional commands,
 189                                      InTransferLength bytes were transferred from InDataBuffer. For write and
 190                                      bi-directional commands, OutTransferLength bytes were transferred by OutDataBuffer.
 191   @retval EFI_BAD_BUFFER_SIZE        The ATA command was not executed. The number of bytes that could be transferred
 192                                      is returned in InTransferLength. For write and bi-directional commands,
 193                                      OutTransferLength bytes were transferred by OutDataBuffer.
 194   @retval EFI_NOT_READY              The ATA command could not be sent because there are too many ATA commands
 195                                      already queued. The caller may retry again later.
 196   @retval EFI_DEVICE_ERROR           A device error occurred while attempting to send the ATA command.
 197   @retval EFI_INVALID_PARAMETER      Port, PortMultiplierPort, or the contents of Acb are invalid. The ATA
 198                                      command was not sent, so no additional status information is available.
 199
 200 **/
 201 typedef
 202 EFI_STATUS
 203 (EFIAPI *EFI_ATA_PASS_THRU_PASSTHRU)(
 204   IN     EFI_ATA_PASS_THRU_PROTOCOL       *This,
 205   IN     UINT16                           Port,
 206   IN     UINT16                           PortMultiplierPort,
 207   IN OUT EFI_ATA_PASS_THRU_COMMAND_PACKET *Packet,
 208   IN     EFI_EVENT                        Event OPTIONAL
 209   );
 210
 211 /**
 212   Used to retrieve the list of legal port numbers for ATA devices on an ATA controller.
 213   These can either be the list of ports where ATA devices are actually present or the
 214   list of legal port numbers for the ATA controller. Regardless, the caller of this
 215   function must probe the port number returned to see if an ATA device is actually
 216   present at that location on the ATA controller.
 217
 218   The GetNextPort() function retrieves the port number on an ATA controller. If on input
 219   Port is 0xFFFF, then the port number of the first port on the ATA controller is returned
 220   in Port and EFI_SUCCESS is returned.
 221
 222   If Port is a port number that was returned on a previous call to GetNextPort(), then the
 223   port number of the next port on the ATA controller is returned in Port, and EFI_SUCCESS
 224   is returned. If Port is not 0xFFFF and Port was not returned on a previous call to
 225   GetNextPort(), then EFI_INVALID_PARAMETER is returned.
 226
 227   If Port is the port number of the last port on the ATA controller, then EFI_NOT_FOUND is
 228   returned.
 229
 230   @param[in]     This           A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 231   @param[in,out] Port           On input, a pointer to the port number on the ATA controller.
 232                                 On output, a pointer to the next port number on the ATA
 233                                 controller. An input value of 0xFFFF retrieves the first port
 234                                 number on the ATA controller.
 235
 236   @retval EFI_SUCCESS           The next port number on the ATA controller was returned in Port.
 237   @retval EFI_NOT_FOUND         There are no more ports on this ATA controller.
 238   @retval EFI_INVALID_PARAMETER Port is not 0xFFFF and Port was not returned on a previous call
 239                                 to GetNextPort().
 240
 241 **/
 242 typedef
 243 EFI_STATUS
 244 (EFIAPI *EFI_ATA_PASS_THRU_GET_NEXT_PORT)(
 245   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 246   IN OUT UINT16                 *Port
 247   );
 248
 249 /**
 250   Used to retrieve the list of legal port multiplier port numbers for ATA devices on a port of an ATA
 251   controller. These can either be the list of port multiplier ports where ATA devices are actually
 252   present on port or the list of legal port multiplier ports on that port. Regardless, the caller of this
 253   function must probe the port number and port multiplier port number returned to see if an ATA
 254   device is actually present.
 255
 256   The GetNextDevice() function retrieves the port multiplier port number of an ATA device
 257   present on a port of an ATA controller.
 258
 259   If PortMultiplierPort points to a port multiplier port number value that was returned on a
 260   previous call to GetNextDevice(), then the port multiplier port number of the next ATA device
 261   on the port of the ATA controller is returned in PortMultiplierPort, and EFI_SUCCESS is
 262   returned.
 263
 264   If PortMultiplierPort points to 0xFFFF, then the port multiplier port number of the first
 265   ATA device on port of the ATA controller is returned in PortMultiplierPort and
 266   EFI_SUCCESS is returned.
 267
 268   If PortMultiplierPort is not 0xFFFF and the value pointed to by PortMultiplierPort
 269   was not returned on a previous call to GetNextDevice(), then EFI_INVALID_PARAMETER
 270   is returned.
 271
 272   If PortMultiplierPort is the port multiplier port number of the last ATA device on the port of
 273   the ATA controller, then EFI_NOT_FOUND is returned.
 274
 275   @param[in]     This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 276   @param[in]     Port                The port number present on the ATA controller.
 277   @param[in,out] PortMultiplierPort  On input, a pointer to the port multiplier port number of an
 278                                      ATA device present on the ATA controller.
 279                                      If on input a PortMultiplierPort of 0xFFFF is specified,
 280                                      then the port multiplier port number of the first ATA device
 281                                      is returned. On output, a pointer to the port multiplier port
 282                                      number of the next ATA device present on an ATA controller.
 283
 284   @retval EFI_SUCCESS                The port multiplier port number of the next ATA device on the port
 285                                      of the ATA controller was returned in PortMultiplierPort.
 286   @retval EFI_NOT_FOUND              There are no more ATA devices on this port of the ATA controller.
 287   @retval EFI_INVALID_PARAMETER      PortMultiplierPort is not 0xFFFF, and PortMultiplierPort was not
 288                                      returned on a previous call to GetNextDevice().
 289
 290 **/
 291 typedef
 292 EFI_STATUS
 293 (EFIAPI *EFI_ATA_PASS_THRU_GET_NEXT_DEVICE)(
 294   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 295   IN UINT16                     Port,
 296   IN OUT UINT16                 *PortMultiplierPort
 297   );
 298
 299 /**
 300   Used to allocate and build a device path node for an ATA device on an ATA controller.
 301
 302   The BuildDevicePath() function allocates and builds a single device node for the ATA
 303   device specified by Port and PortMultiplierPort. If the ATA device specified by Port and
 304   PortMultiplierPort is not present on the ATA controller, then EFI_NOT_FOUND is returned.
 305   If DevicePath is NULL, then EFI_INVALID_PARAMETER is returned. If there are not enough
 306   resources to allocate the device path node, then EFI_OUT_OF_RESOURCES is returned.
 307
 308   Otherwise, DevicePath is allocated with the boot service AllocatePool(), the contents of
 309   DevicePath are initialized to describe the ATA device specified by Port and PortMultiplierPort,
 310   and EFI_SUCCESS is returned.
 311
 312   @param[in]     This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 313   @param[in]     Port                Port specifies the port number of the ATA device for which a
 314                                      device path node is to be allocated and built.
 315   @param[in]     PortMultiplierPort  The port multiplier port number of the ATA device for which a
 316                                      device path node is to be allocated and built. If there is no
 317                                      port multiplier, then specify 0xFFFF.
 318   @param[in,out] DevicePath          A pointer to a single device path node that describes the ATA
 319                                      device specified by Port and PortMultiplierPort. This function
 320                                      is responsible for allocating the buffer DevicePath with the
 321                                      boot service AllocatePool(). It is the caller's responsibility
 322                                      to free DevicePath when the caller is finished with DevicePath.
 323   @retval EFI_SUCCESS                The device path node that describes the ATA device specified by
 324                                      Port and PortMultiplierPort was allocated and returned in DevicePath.
 325   @retval EFI_NOT_FOUND              The ATA device specified by Port and PortMultiplierPort does not
 326                                      exist on the ATA controller.
 327   @retval EFI_INVALID_PARAMETER      DevicePath is NULL.
 328   @retval EFI_OUT_OF_RESOURCES       There are not enough resources to allocate DevicePath.
 329
 330 **/
 331 typedef
 332 EFI_STATUS
 333 (EFIAPI *EFI_ATA_PASS_THRU_BUILD_DEVICE_PATH)(
 334   IN     EFI_ATA_PASS_THRU_PROTOCOL *This,
 335   IN     UINT16                     Port,
 336   IN     UINT16                     PortMultiplierPort,
 337   IN OUT EFI_DEVICE_PATH_PROTOCOL   **DevicePath
 338   );
 339
 340 /**
 341   Used to translate a device path node to a port number and port multiplier port number.
 342
 343   The GetDevice() function determines the port and port multiplier port number associated with
 344   the ATA device described by DevicePath. If DevicePath is a device path node type that the
 345   ATA Pass Thru driver supports, then the ATA Pass Thru driver will attempt to translate the contents
 346   DevicePath into a port number and port multiplier port number.
 347
 348   If this translation is successful, then that port number and port multiplier port number are returned
 349   in Port and PortMultiplierPort, and EFI_SUCCESS is returned.
 350
 351   If DevicePath, Port, or PortMultiplierPort are NULL, then EFI_INVALID_PARAMETER is returned.
 352
 353   If DevicePath is not a device path node type that the ATA Pass Thru driver supports, then
 354   EFI_UNSUPPORTED is returned.
 355
 356   If DevicePath is a device path node type that the ATA Pass Thru driver supports, but there is not
 357   a valid translation from DevicePath to a port number and port multiplier port number, then
 358   EFI_NOT_FOUND is returned.
 359
 360   @param[in]  This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 361   @param[in]  DevicePath          A pointer to the device path node that describes an ATA device on the
 362                                   ATA controller.
 363   @param[out] Port                On return, points to the port number of an ATA device on the ATA controller.
 364   @param[out] PortMultiplierPort  On return, points to the port multiplier port number of an ATA device
 365                                   on the ATA controller.
 366
 367   @retval EFI_SUCCESS             DevicePath was successfully translated to a port number and port multiplier
 368                                   port number, and they were returned in Port and PortMultiplierPort.
 369   @retval EFI_INVALID_PARAMETER   DevicePath is NULL.
 370   @retval EFI_INVALID_PARAMETER   Port is NULL.
 371   @retval EFI_INVALID_PARAMETER   PortMultiplierPort is NULL.
 372   @retval EFI_UNSUPPORTED         This driver does not support the device path node type in DevicePath.
 373   @retval EFI_NOT_FOUND           A valid translation from DevicePath to a port number and port multiplier
 374                                   port number does not exist.
 375 **/
 376 typedef
 377 EFI_STATUS
 378 (EFIAPI *EFI_ATA_PASS_THRU_GET_DEVICE)(
 379   IN  EFI_ATA_PASS_THRU_PROTOCOL *This,
 380   IN  EFI_DEVICE_PATH_PROTOCOL   *DevicePath,
 381   OUT UINT16                     *Port,
 382   OUT UINT16                     *PortMultiplierPort
 383   );
 384
 385 /**
 386   Resets a specific port on the ATA controller. This operation also resets all the ATA devices
 387   connected to the port.
 388
 389   The ResetChannel() function resets an a specific port on an ATA controller. This operation
 390   resets all the ATA devices connected to that port. If this ATA controller does not support
 391   a reset port operation, then EFI_UNSUPPORTED is returned.
 392
 393   If a device error occurs while executing that port reset operation, then EFI_DEVICE_ERROR is
 394   returned.
 395
 396   If a timeout occurs during the execution of the port reset operation, then EFI_TIMEOUT is returned.
 397
 398   If the port reset operation is completed, then EFI_SUCCESS is returned.
 399
 400   @param[in]  This          A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 401   @param[in]  Port          The port number on the ATA controller.
 402
 403   @retval EFI_SUCCESS       The ATA controller port was reset.
 404   @retval EFI_UNSUPPORTED   The ATA controller does not support a port reset operation.
 405   @retval EFI_DEVICE_ERROR  A device error occurred while attempting to reset the ATA port.
 406   @retval EFI_TIMEOUT       A timeout occurred while attempting to reset the ATA port.
 407
 408 **/
 409 typedef
 410 EFI_STATUS
 411 (EFIAPI *EFI_ATA_PASS_THRU_RESET_PORT)(
 412   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 413   IN UINT16                     Port
 414   );
 415
 416 /**
 417   Resets an ATA device that is connected to an ATA controller.
 418
 419   The ResetDevice() function resets the ATA device specified by Port and PortMultiplierPort.
 420   If this ATA controller does not support a device reset operation, then EFI_UNSUPPORTED is
 421   returned.
 422
 423   If Port or PortMultiplierPort are not in a valid range for this ATA controller, then
 424   EFI_INVALID_PARAMETER is returned.
 425
 426   If a device error occurs while executing that device reset operation, then EFI_DEVICE_ERROR
 427   is returned.
 428
 429   If a timeout occurs during the execution of the device reset operation, then EFI_TIMEOUT is
 430   returned.
 431
 432   If the device reset operation is completed, then EFI_SUCCESS is returned.
 433
 434   @param[in] This                A pointer to the EFI_ATA_PASS_THRU_PROTOCOL instance.
 435   @param[in] Port                Port represents the port number of the ATA device to be reset.
 436   @param[in] PortMultiplierPort  The port multiplier port number of the ATA device to reset.
 437                                  If there is no port multiplier, then specify 0xFFFF.
 438   @retval EFI_SUCCESS            The ATA device specified by Port and PortMultiplierPort was reset.
 439   @retval EFI_UNSUPPORTED        The ATA controller does not support a device reset operation.
 440   @retval EFI_INVALID_PARAMETER  Port or PortMultiplierPort are invalid.
 441   @retval EFI_DEVICE_ERROR       A device error occurred while attempting to reset the ATA device
 442                                  specified by Port and PortMultiplierPort.
 443   @retval EFI_TIMEOUT            A timeout occurred while attempting to reset the ATA device
 444                                  specified by Port and PortMultiplierPort.
 445
 446 **/
 447 typedef
 448 EFI_STATUS
 449 (EFIAPI *EFI_ATA_PASS_THRU_RESET_DEVICE)(
 450   IN EFI_ATA_PASS_THRU_PROTOCOL *This,
 451   IN UINT16                     Port,
 452   IN UINT16                     PortMultiplierPort
 453   );
 454
 455 struct _EFI_ATA_PASS_THRU_PROTOCOL {
 456   EFI_ATA_PASS_THRU_MODE               *Mode;
 457   EFI_ATA_PASS_THRU_PASSTHRU           PassThru;
 458   EFI_ATA_PASS_THRU_GET_NEXT_PORT      GetNextPort;
 459   EFI_ATA_PASS_THRU_GET_NEXT_DEVICE    GetNextDevice;
 460   EFI_ATA_PASS_THRU_BUILD_DEVICE_PATH  BuildDevicePath;
 461   EFI_ATA_PASS_THRU_GET_DEVICE         GetDevice;
 462   EFI_ATA_PASS_THRU_RESET_PORT         ResetPort;
 463   EFI_ATA_PASS_THRU_RESET_DEVICE       ResetDevice;
 464 };
 465
 466 extern EFI_GUID gEfiAtaPassThruProtocolGuid;
 467
 468 #endif