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112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/** @file
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Disk IO protocol as defined in the UEFI 2.0 specification.
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The Disk IO protocol is used to convert block oriented devices into byte
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oriented devices. The Disk IO protocol is intended to layer on top of the
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Block IO protocol.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __DISK_IO_H__
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#define __DISK_IO_H__
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#define EFI_DISK_IO_PROTOCOL_GUID \
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{ \
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0xce345171, 0xba0b, 0x11d2, {0x8e, 0x4f, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
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}
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///
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/// Protocol GUID name defined in EFI1.1.
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///
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#define DISK_IO_PROTOCOL EFI_DISK_IO_PROTOCOL_GUID
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typedef struct _EFI_DISK_IO_PROTOCOL EFI_DISK_IO_PROTOCOL;
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///
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/// Protocol defined in EFI1.1.
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///
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typedef EFI_DISK_IO_PROTOCOL EFI_DISK_IO;
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/**
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Read BufferSize bytes from Offset into Buffer.
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@param This Protocol instance pointer.
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@param MediaId Id of the media, changes every time the media is replaced.
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@param Offset The starting byte offset to read from
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@param BufferSize Size of Buffer
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@param Buffer Buffer containing read data
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@retval EFI_SUCCESS The data was read correctly from the device.
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@retval EFI_DEVICE_ERROR The device reported an error while performing the read.
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@retval EFI_NO_MEDIA There is no media in the device.
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@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
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@retval EFI_INVALID_PARAMETER The read request contains device addresses that are not
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valid for the device.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DISK_READ)(
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IN EFI_DISK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN UINT64 Offset,
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IN UINTN BufferSize,
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OUT VOID *Buffer
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);
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/**
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Writes a specified number of bytes to a device.
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@param This Indicates a pointer to the calling context.
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@param MediaId ID of the medium to be written.
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@param Offset The starting byte offset on the logical block I/O device to write.
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@param BufferSize The size in bytes of Buffer. The number of bytes to write to the device.
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@param Buffer A pointer to the buffer containing the data to be written.
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@retval EFI_SUCCESS The data was written correctly to the device.
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@retval EFI_WRITE_PROTECTED The device can not be written to.
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@retval EFI_DEVICE_ERROR The device reported an error while performing the write.
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@retval EFI_NO_MEDIA There is no media in the device.
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@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
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@retval EFI_INVALID_PARAMETER The write request contains device addresses that are not
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valid for the device.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DISK_WRITE)(
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IN EFI_DISK_IO_PROTOCOL *This,
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IN UINT32 MediaId,
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IN UINT64 Offset,
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IN UINTN BufferSize,
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IN VOID *Buffer
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);
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#define EFI_DISK_IO_PROTOCOL_REVISION 0x00010000
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///
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/// Revision defined in EFI1.1
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///
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#define EFI_DISK_IO_INTERFACE_REVISION EFI_DISK_IO_PROTOCOL_REVISION
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///
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/// This protocol is used to abstract Block I/O interfaces.
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///
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struct _EFI_DISK_IO_PROTOCOL {
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///
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/// The revision to which the disk I/O interface adheres. All future
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/// revisions must be backwards compatible. If a future version is not
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/// backwards compatible, it is not the same GUID.
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///
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UINT64 Revision;
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EFI_DISK_READ ReadDisk;
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EFI_DISK_WRITE WriteDisk;
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};
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extern EFI_GUID gEfiDiskIoProtocolGuid;
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#endif
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