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167 lines
7.1 KiB
C
167 lines
7.1 KiB
C
/** @file
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Disk I/O 2 protocol as defined in the UEFI 2.4 specification.
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The Disk I/O 2 protocol defines an extension to the Disk I/O protocol to enable
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non-blocking / asynchronous byte-oriented disk operation.
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Copyright (c) 2013 - 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_IO2_H__
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#define __DISK_IO2_H__
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#define EFI_DISK_IO2_PROTOCOL_GUID \
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{ \
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0x151c8eae, 0x7f2c, 0x472c, 0x9e, 0x54, 0x98, 0x28, 0x19, 0x4f, 0x6a, 0x88 \
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}
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typedef struct _EFI_DISK_IO2_PROTOCOL EFI_DISK_IO2_PROTOCOL;
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/**
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The struct of Disk IO2 Token.
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**/
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typedef struct {
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//
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// If Event is NULL, then blocking I/O is performed.
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// If Event is not NULL and non-blocking I/O is supported, then non-blocking I/O is performed,
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// and Event will be signaled when the I/O request is completed.
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// The caller must be prepared to handle the case where the callback associated with Event occurs
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// before the original asynchronous I/O request call returns.
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//
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EFI_EVENT Event;
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//
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// Defines whether or not the signaled event encountered an error.
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//
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EFI_STATUS TransactionStatus;
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} EFI_DISK_IO2_TOKEN;
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/**
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Terminate outstanding asynchronous requests to a device.
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@param This Indicates a pointer to the calling context.
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@retval EFI_SUCCESS All outstanding requests were successfully terminated.
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@retval EFI_DEVICE_ERROR The device reported an error while performing the cancel
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operation.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DISK_CANCEL_EX) (
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IN EFI_DISK_IO2_PROTOCOL *This
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);
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/**
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Reads a specified number of bytes from 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 read.
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@param Offset The starting byte offset on the logical block I/O device to read from.
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@param Token A pointer to the token associated with the transaction.
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If this field is NULL, synchronous/blocking IO is performed.
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@param BufferSize The size in bytes of Buffer. The number of bytes to read from the device.
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@param Buffer A pointer to the destination buffer for the data.
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The caller is responsible either having implicit or explicit ownership of the buffer.
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@retval EFI_SUCCESS If Event is NULL (blocking I/O): The data was read correctly from the device.
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If Event is not NULL (asynchronous I/O): The request was successfully queued for processing.
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Event will be signaled upon completion.
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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 medium in the device.
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@retval EFI_MEDIA_CHNAGED The MediaId is not for the current medium.
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@retval EFI_INVALID_PARAMETER The read request contains device addresses that are not valid for the device.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DISK_READ_EX) (
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IN EFI_DISK_IO2_PROTOCOL *This,
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IN UINT32 MediaId,
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IN UINT64 Offset,
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IN OUT EFI_DISK_IO2_TOKEN *Token,
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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 to.
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@param Token A pointer to the token associated with the transaction.
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If this field is NULL, synchronous/blocking IO is performed.
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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 If Event is NULL (blocking I/O): The data was written correctly to the device.
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If Event is not NULL (asynchronous I/O): The request was successfully queued for processing.
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Event will be signaled upon completion.
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@retval EFI_WRITE_PROTECTED The device cannot be written to.
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@retval EFI_DEVICE_ERROR The device reported an error while performing the write operation.
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@retval EFI_NO_MEDIA There is no medium in the device.
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@retval EFI_MEDIA_CHNAGED The MediaId is not for the current medium.
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@retval EFI_INVALID_PARAMETER The write request contains device addresses that are not valid for the device.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DISK_WRITE_EX) (
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IN EFI_DISK_IO2_PROTOCOL *This,
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IN UINT32 MediaId,
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IN UINT64 Offset,
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IN OUT EFI_DISK_IO2_TOKEN *Token,
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IN UINTN BufferSize,
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IN VOID *Buffer
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);
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/**
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Flushes all modified data to the physical 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 Token A pointer to the token associated with the transaction.
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If this field is NULL, synchronous/blocking IO is performed.
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@retval EFI_SUCCESS If Event is NULL (blocking I/O): The data was flushed successfully to the device.
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If Event is not NULL (asynchronous I/O): The request was successfully queued for processing.
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Event will be signaled upon completion.
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@retval EFI_WRITE_PROTECTED The device cannot be written to.
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@retval EFI_DEVICE_ERROR The device reported an error while performing the write operation.
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@retval EFI_NO_MEDIA There is no medium in the device.
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@retval EFI_MEDIA_CHNAGED The MediaId is not for the current medium.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DISK_FLUSH_EX) (
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IN EFI_DISK_IO2_PROTOCOL *This,
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IN OUT EFI_DISK_IO2_TOKEN *Token
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);
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#define EFI_DISK_IO2_PROTOCOL_REVISION 0x00020000
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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_IO2_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_CANCEL_EX Cancel;
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EFI_DISK_READ_EX ReadDiskEx;
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EFI_DISK_WRITE_EX WriteDiskEx;
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EFI_DISK_FLUSH_EX FlushDiskEx;
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};
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extern EFI_GUID gEfiDiskIo2ProtocolGuid;
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#endif
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