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/** @file
EFI_TAPE_IO_PROTOCOL as defined in the UEFI 2.0.
Provide services to control and access a tape device.
Copyright (c) 2006 - 2010, 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 that 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 __EFI_TAPE_IO_PROTOCOL_H__
#define __EFI_TAPE_IO_PROTOCOL_H__
#define EFI_TAPE_IO_PROTOCOL_GUID \
{ \
0x1e93e633, 0xd65a, 0x459e, {0xab, 0x84, 0x93, 0xd9, 0xec, 0x26, 0x6d, 0x18 } \
}
typedef struct _EFI_TAPE_IO_PROTOCOL EFI_TAPE_IO_PROTOCOL;
typedef struct _EFI_TAPE_HEADER {
UINT64 Signature;
UINT32 Revision;
UINT32 BootDescSize;
UINT32 BootDescCRC;
EFI_GUID TapeGUID;
EFI_GUID TapeType;
EFI_GUID TapeUnique;
UINT32 BLLocation;
UINT32 BLBlocksize;
UINT32 BLFilesize;
CHAR8 OSVersion[40];
CHAR8 AppVersion[40];
CHAR8 CreationDate[10];
CHAR8 CreationTime[10];
CHAR8 SystemName[256]; // UTF-8
CHAR8 TapeTitle[120]; // UTF-8
CHAR8 pad[468]; // pad to 1024
} EFI_TAPE_HEADER;
/**
Reads from the tape.
@param This A pointer to the EFI_TAPE_IO_PROTOCOL instance.
@param BufferSize The size of the buffer in bytes pointed to by Buffer.
@param Buffer The pointer to the buffer for data to be read into.
@retval EFI_SUCCESS Data was successfully transferred from the media.
@retval EFI_END_OF_FILE A filemark was encountered which limited the data
transferred by the read operation or the head is positioned
just after a filemark.
@retval EFI_NO_MEDIA No media is loaded in the device.
@retval EFI_NOT_READY The transfer failed since the device was not ready (e.g. not
online). The transfer may be retried at a later time.
@retval EFI_UNSUPPORTED The device does not support this type of transfer.
@retval EFI_TIMEOUT The transfer failed to complete within the timeout specified.
@retval EFI_MEDIA_CHANGED The media in the device was changed since the last access.
The transfer was aborted since the current position of the
media may be incorrect.
@retval EFI_INVALID_PARAMETER A NULL Buffer was specified with a non-zero
BufferSize, or the device is operating in fixed block
size mode and the BufferSize was not a multiple of
device's fixed block size
@retval EFI_DEVICE_ERROR A device error occurred while attempting to transfer data
from the media.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_TAPE_READ)(
IN EFI_TAPE_IO_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
/**
Writes to the tape.
@param This A pointer to the EFI_TAPE_IO_PROTOCOL instance.
@param BufferSize Size of the buffer in bytes pointed to by Buffer.
@param Buffer The pointer to the buffer for data to be written from.
@retval EFI_SUCCESS Data was successfully transferred to the media.
@retval EFI_END_OF_MEDIA The logical end of media has been reached. Data may have
been successfully transferred to the media.
@retval EFI_NO_MEDIA No media is loaded in the device.
@retval EFI_NOT_READY The transfer failed since the device was not ready (e.g. not
online). The transfer may be retried at a later time.
@retval EFI_UNSUPPORTED The device does not support this type of transfer.
@retval EFI_TIMEOUT The transfer failed to complete within the timeout specified.
@retval EFI_MEDIA_CHANGED The media in the device was changed since the last access.
The transfer was aborted since the current position of the
media may be incorrect.
@retval EFI_WRITE_PROTECTED The media in the device is write-protected. The transfer
was aborted since a write cannot be completed.
@retval EFI_INVALID_PARAMETER A NULL Buffer was specified with a non-zero
BufferSize, or the device is operating in fixed block
size mode and the BufferSize was not a multiple of
device's fixed block size
@retval EFI_DEVICE_ERROR A device error occurred while attempting to transfer data
from the media.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_TAPE_WRITE)(
IN EFI_TAPE_IO_PROTOCOL *This,
IN UINTN *BufferSize,
IN VOID *Buffer
);
/**
Rewinds the tape.
@param This A pointer to the EFI_TAPE_IO_PROTOCOL instance.
@retval EFI_SUCCESS The media was successfully repositioned.
@retval EFI_NO_MEDIA No media is loaded in the device.
@retval EFI_NOT_READY Repositioning the media failed since the device was not
ready (e.g. not online). The transfer may be retried at a later time.
@retval EFI_UNSUPPORTED The device does not support this type of media repositioning.
@retval EFI_TIMEOUT Repositioning of the media did not complete within the timeout specified.
@retval EFI_DEVICE_ERROR A device error occurred while attempting to reposition the media.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_TAPE_REWIND)(
IN EFI_TAPE_IO_PROTOCOL *This
);
/**
Positions the tape.
@param This A pointer to the EFI_TAPE_IO_PROTOCOL instance.
@param Direction Direction and number of data blocks or filemarks to space over on media.
@param Type Type of mark to space over on media.
The following Type marks are mandatory:
BLOCK type : 0
FILEMARK type : 1
@retval EFI_SUCCESS The media was successfully repositioned.
@retval EFI_END_OF_MEDIA Beginning or end of media was reached before the
indicated number of data blocks or filemarks were found.
@retval EFI_NO_MEDIA No media is loaded in the device.
@retval EFI_NOT_READY The reposition failed since the device was not ready (e.g. not
online). The reposition may be retried at a later time.
@retval EFI_UNSUPPORTED The device does not support this type of repositioning.
@retval EFI_TIMEOUT The repositioning failed to complete within the timeout specified.
@retval EFI_MEDIA_CHANGED The media in the device was changed since the last access.
Repositioning the media was aborted since the current
position of the media may be incorrect.
@retval EFI_DEVICE_ERROR A device error occurred while attempting to reposition the media.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_TAPE_SPACE)(
IN EFI_TAPE_IO_PROTOCOL *This,
IN INTN Direction,
IN UINTN Type
);
/**
Writes filemarks to the media.
@param This A pointer to the EFI_TAPE_IO_PROTOCOL instance.
@param Count Number of filemarks to write to the media.
@retval EFI_SUCCESS Data was successfully transferred from the media.
@retval EFI_NO_MEDIA No media is loaded in the device.
@retval EFI_NOT_READY The transfer failed since the device was not ready (e.g. not
online). The transfer may be retried at a later time.
@retval EFI_UNSUPPORTED The device does not support this type of repositioning.
@retval EFI_TIMEOUT The transfer failed to complete within the timeout specified.
@retval EFI_MEDIA_CHANGED The media in the device was changed since the last access.
The transfer was aborted since the current position of the
media may be incorrect.
@retval EFI_DEVICE_ERROR A device error occurred while attempting to transfer data from the media.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_TAPE_WRITEFM)(
IN EFI_TAPE_IO_PROTOCOL *This,
IN UINTN Count
);
/**
Resets the tape device.
@param This A pointer to the EFI_TAPE_IO_PROTOCOL instance.
@param ExtendedVerification Indicates whether the parent bus should also be reset.
@retval EFI_SUCCESS The bus and/or device were successfully reset.
@retval EFI_NO_MEDIA No media is loaded in the device.
@retval EFI_NOT_READY The reset failed since the device and/or bus was not ready.
The reset may be retried at a later time.
@retval EFI_UNSUPPORTED The device does not support this type of reset.
@retval EFI_TIMEOUT The reset did not complete within the timeout allowed.
@retval EFI_DEVICE_ERROR A device error occurred while attempting to reset the bus and/or device.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_TAPE_RESET)(
IN EFI_TAPE_IO_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
);
///
/// The EFI_TAPE_IO_PROTOCOL provides basic sequential operations for tape devices.
/// These include read, write, rewind, space, write filemarks and reset functions.
/// Per this specification, a boot application uses the services of this protocol
/// to load the bootloader image from tape.
///
struct _EFI_TAPE_IO_PROTOCOL {
EFI_TAPE_READ TapeRead;
EFI_TAPE_WRITE TapeWrite;
EFI_TAPE_REWIND TapeRewind;
EFI_TAPE_SPACE TapeSpace;
EFI_TAPE_WRITEFM TapeWriteFM;
EFI_TAPE_RESET TapeReset;
};
extern EFI_GUID gEfiTapeIoProtocolGuid;
#endif
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