MdePkg/Include/Protocol/ScsiIo.h

   1 /** @file
   2   EFI_SCSI_IO_PROTOCOL as defined in UEFI 2.0.
   3   This protocol is used by code, typically drivers, running in the EFI boot
   4   services environment to access SCSI devices. In particular, functions for
   5   managing devices on SCSI buses are defined here.
   6
   7   Copyright (c) 2006 - 2008, Intel Corporation
   8   All rights reserved. This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16 **/
  17
  18 #ifndef __EFI_SCSI_IO_PROTOCOL_H__
  19 #define __EFI_SCSI_IO_PROTOCOL_H__
  20
  21 #define EFI_SCSI_IO_PROTOCOL_GUID \
  22   { \
  23     0x932f4736, 0x2362, 0x4002, {0x80, 0x3e, 0x3c, 0xd5, 0x4b, 0x13, 0x8f, 0x85 } \
  24   }
  25
  26 //
  27 // Forward reference for pure ANSI compatability
  28 //
  29 typedef struct _EFI_SCSI_IO_PROTOCOL EFI_SCSI_IO_PROTOCOL;
  30
  31 //
  32 // SCSI Data Direction definition
  33 //
  34 #define EFI_SCSI_IO_DATA_DIRECTION_READ                        0
  35 #define EFI_SCSI_IO_DATA_DIRECTION_WRITE                       1
  36 #define EFI_SCSI_IO_DATA_DIRECTION_BIDIRECTIONAL               2
  37
  38 //
  39 // SCSI Host Adapter Status definition
  40 //
  41 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_OK                     0x00
  42 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_TIMEOUT_COMMAND        0x09    // timeout when processing the command
  43 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_TIMEOUT                0x0b    // timeout when waiting for the command processing
  44 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_MESSAGE_REJECT         0x0d    // a message reject was received when processing command
  45 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_BUS_RESET              0x0e    // a bus reset was detected
  46 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_PARITY_ERROR           0x0f
  47 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_REQUEST_SENSE_FAILED   0x10    // the adapter failed in issuing request sense command
  48 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_SELECTION_TIMEOUT      0x11    // selection timeout
  49 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_DATA_OVERRUN_UNDERRUN  0x12    // data overrun or data underrun
  50 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_BUS_FREE               0x13    // Unexepected bus free
  51 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_PHASE_ERROR            0x14    // Target bus phase sequence failure
  52 #define EFI_SCSI_IO_STATUS_HOST_ADAPTER_OTHER                  0x7f
  53
  54
  55 //
  56 // SCSI Target Status definition
  57 //
  58 #define EFI_SCSI_IO_STATUS_TARGET_GOOD                         0x00
  59 #define EFI_SCSI_IO_STATUS_TARGET_CHECK_CONDITION              0x02    // check condition
  60 #define EFI_SCSI_IO_STATUS_TARGET_CONDITION_MET                0x04    // condition met
  61 #define EFI_SCSI_IO_STATUS_TARGET_BUSY                         0x08    // busy
  62 #define EFI_SCSI_IO_STATUS_TARGET_INTERMEDIATE                 0x10    // intermediate
  63 #define EFI_SCSI_IO_STATUS_TARGET_INTERMEDIATE_CONDITION_MET   0x14    // intermediate-condition met
  64 #define EFI_SCSI_IO_STATUS_TARGET_RESERVATION_CONFLICT         0x18    // reservation conflict
  65 #define EFI_SCSI_IO_STATUS_TARGET_COMMOND_TERMINATED           0x22    // command terminated
  66 #define EFI_SCSI_IO_STATUS_TARGET_QUEUE_FULL                   0x28    // queue full
  67
  68 typedef struct {
  69   UINT64                              Timeout;
  70   VOID                                *InDataBuffer;
  71   VOID                                *OutDataBuffer;
  72   VOID                                *SenseData;
  73   VOID                                *Cdb;
  74   UINT32                              InTransferLength;
  75   UINT32                              OutTransferLength;
  76   UINT8                               CdbLength;
  77   UINT8                               DataDirection;
  78   UINT8                               HostAdapterStatus;
  79   UINT8                               TargetStatus;
  80   UINT8                               SenseDataLength;
  81 } EFI_SCSI_IO_SCSI_REQUEST_PACKET;
  82
  83 /**
  84   Retrieves the device type information of the SCSI Controller.
  85
  86   @param  This       Protocol instance pointer.
  87   @param  DeviceType A pointer to the device type information
  88                      retrieved from the SCSI Controller.
  89
  90   @retval EFI_SUCCESS           Retrieves the device type information successfully.
  91   @retval EFI_INVALID_PARAMETER The DeviceType is NULL.
  92
  93 **/
  94 typedef
  95 EFI_STATUS
  96 (EFIAPI *EFI_SCSI_IO_PROTOCOL_GET_DEVICE_TYPE)(
  97   IN  EFI_SCSI_IO_PROTOCOL            *This,
  98   OUT UINT8                           *DeviceType
  99   )
 100 ;
 101
 102 /**
 103   Retrieves the device location in the SCSI channel.
 104
 105   @param  This   Protocol instance pointer.
 106   @param  Target A pointer to the Target ID of a SCSI device
 107                  on the SCSI channel.
 108   @param  Lun    A pointer to the LUN of the SCSI device on
 109                  the SCSI channel.
 110
 111   @retval EFI_SUCCESS           Retrieves the device location successfully.
 112   @retval EFI_INVALID_PARAMETER The Target or Lun is NULL.
 113
 114 **/
 115 typedef
 116 EFI_STATUS
 117 (EFIAPI *EFI_SCSI_IO_PROTOCOL_GET_DEVICE_LOCATION)(
 118   IN EFI_SCSI_IO_PROTOCOL           *This,
 119   IN OUT UINT8                      **Target,
 120   OUT UINT64                        *Lun
 121   )
 122 ;
 123
 124 /**
 125   Resets the SCSI Bus that the SCSI Controller is attached to.
 126
 127   @param  This Protocol instance pointer.
 128
 129   @retval EFI_SUCCESS      The SCSI bus is reset successfully.
 130   @retval EFI_DEVICE_ERROR Errors encountered when resetting the SCSI bus.
 131   @retval EFI_UNSUPPORTED  The bus reset operation is not supported by the
 132                            SCSI Host Controller.
 133   @retval EFI_TIMEOUT      A timeout occurred while attempting to reset
 134                             the SCSI bus.
 135
 136 **/
 137 typedef
 138 EFI_STATUS
 139 (EFIAPI *EFI_SCSI_IO_PROTOCOL_RESET_BUS)(
 140   IN EFI_SCSI_IO_PROTOCOL     *This
 141   )
 142 ;
 143
 144 /**
 145   Resets the SCSI Controller that the device handle specifies.
 146
 147   @param  This Protocol instance pointer.
 148
 149   @retval EFI_SUCCESS      Reset the SCSI controller successfully.
 150   @retval EFI_DEVICE_ERROR Errors are encountered when resetting the
 151                            SCSI Controller.
 152   @retval EFI_UNSUPPORTED  The SCSI bus does not support a device
 153                            reset operation.
 154   @retval EFI_TIMEOUT      A timeout occurred while attempting to
 155                            reset the SCSI Controller.
 156
 157 **/
 158 typedef
 159 EFI_STATUS
 160 (EFIAPI *EFI_SCSI_IO_PROTOCOL_RESET_DEVICE)(
 161   IN EFI_SCSI_IO_PROTOCOL     *This
 162   )
 163 ;
 164
 165
 166 /**
 167   Sends a SCSI Request Packet to the SCSI Controller for execution.
 168
 169   @param  This    Protocol instance pointer.
 170   @param  Packet  The SCSI request packet to send to the SCSI
 171                   Controller specified by the device handle.
 172   @param  Event   If the SCSI bus where the SCSI device is attached
 173                   does not support non-blocking I/O, then Event is
 174                   ignored, and blocking I/O is performed.
 175                   If Event is NULL, then blocking I/O is performed.
 176                   If Event is not NULL and non-blocking I/O is
 177                   supported, then non-blocking I/O is performed,
 178                   and Event will be signaled when the SCSI Request
 179                   Packet completes.
 180
 181   @retval EFI_SUCCESS               The SCSI Request Packet was sent by the host
 182                                     successfully, and TransferLength bytes were
 183                                     transferred to/from DataBuffer.See
 184                                     HostAdapterStatus, TargetStatus,
 185                                     SenseDataLength, and SenseData in that order
 186                                     for additional status information.
 187   @retval EFI_BAD_BUFFER_SIZE       The SCSI Request Packet was executed,
 188                                     but the entire DataBuffer could not be transferred.
 189                                     The actual number of bytes transferred is returned
 190                                     in TransferLength. See HostAdapterStatus,
 191                                     TargetStatus, SenseDataLength, and SenseData in
 192                                     that order for additional status information.
 193   @retval EFI_NOT_READY             The SCSI Request Packet could not be sent because
 194                                     there are too many SCSI Command Packets already
 195                                     queued.The caller may retry again later.
 196   @retval EFI_DEVICE_ERROR          A device error occurred while attempting to send
 197                                     the SCSI Request Packet. See HostAdapterStatus,
 198                                     TargetStatus, SenseDataLength, and SenseData in
 199                                     that order for additional status information.
 200   @retval EFI_INVALID_PARAMETER     The contents of CommandPacket are invalid.
 201                                     The SCSI Request Packet was not sent, so no
 202                                     additional status information is available.
 203   @retval EFI_UNSUPPORTED           The command described by the SCSI Request Packet
 204                                     is not supported by the SCSI initiator(i.e., SCSI
 205                                     Host Controller). The SCSI Request Packet was not
 206                                     sent, so no additional status information is
 207                                     available.
 208   @retval EFI_TIMEOUT               A timeout occurred while waiting for the SCSI
 209                                     Request Packet to execute. See HostAdapterStatus,
 210                                     TargetStatus, SenseDataLength, and SenseData in
 211                                     that order for additional status information.
 212
 213 **/
 214 typedef
 215 EFI_STATUS
 216 (EFIAPI *EFI_SCSI_IO_PROTOCOL_EXEC_SCSI_COMMAND)(
 217   IN EFI_SCSI_IO_PROTOCOL                   *This,
 218   IN OUT  EFI_SCSI_IO_SCSI_REQUEST_PACKET   *Packet,
 219   IN EFI_EVENT                              Event  OPTIONAL
 220   )
 221 ;
 222
 223 /**
 224   @par Protocol Description:
 225   Provides services to manage and communicate with SCSI devices.
 226
 227   @param GetDeviceType
 228   Retrieves the information of the device type which the SCSI device belongs to.
 229
 230   @param GetDeviceLocation
 231   Retrieves the device location information in the SCSI bus.
 232
 233   @param ResetBus
 234   Resets the entire SCSI bus the SCSI device attaches to.
 235
 236   @param ResetDevice
 237   Resets the SCSI Device that is specified by the device handle the SCSI I/O
 238   protocol attaches.
 239
 240   @param ExecuteScsiCommand
 241   Sends a SCSI command to the SCSI device and waits for the execution completion
 242   until an exit condition is met, or a timeout occurs.
 243
 244   @param IoAlign
 245   Supplies the alignment requirement for any buffer used in a data transfer.
 246   IoAlign values of 0 and 1 mean that the buffer can be placed anywhere in memory.
 247   Otherwise, IoAlign must be a power of 2, and the requirement is that the
 248   start address of a buffer must be evenly divisible by IoAlign with no remainder.
 249
 250 **/
 251 struct _EFI_SCSI_IO_PROTOCOL {
 252   EFI_SCSI_IO_PROTOCOL_GET_DEVICE_TYPE      GetDeviceType;
 253   EFI_SCSI_IO_PROTOCOL_GET_DEVICE_LOCATION  GetDeviceLocation;
 254   EFI_SCSI_IO_PROTOCOL_RESET_BUS            ResetBus;
 255   EFI_SCSI_IO_PROTOCOL_RESET_DEVICE         ResetDevice;
 256   EFI_SCSI_IO_PROTOCOL_EXEC_SCSI_COMMAND    ExecuteScsiCommand;
 257   UINT32                                    IoAlign;
 258 };
 259
 260 extern EFI_GUID gEfiScsiIoProtocolGuid;
 261
 262 #endif