mirror of https://github.com/acidanthera/audk.git
207 lines
8.5 KiB
C
207 lines
8.5 KiB
C
/** @file
|
|
Block IO2 protocol as defined in the UEFI 2.3.1 specification.
|
|
|
|
The Block IO2 protocol defines an extension to the Block IO protocol which
|
|
enables the ability to read and write data at a block level in a non-blocking
|
|
manner.
|
|
|
|
Copyright (c) 2011, 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
|
|
which 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 __BLOCK_IO2_H__
|
|
#define __BLOCK_IO2_H__
|
|
|
|
#include <Protocol/BlockIo.h>
|
|
|
|
#define EFI_BLOCK_IO2_PROTOCOL_GUID \
|
|
{ \
|
|
0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \
|
|
}
|
|
|
|
typedef struct _EFI_BLOCK_IO2_PROTOCOL EFI_BLOCK_IO2_PROTOCOL;
|
|
|
|
/**
|
|
The struct of Block IO2 Token.
|
|
**/
|
|
typedef struct {
|
|
|
|
///
|
|
/// If Event is NULL, then blocking I/O is performed.If Event is not NULL and
|
|
/// non-blocking I/O is supported, then non-blocking I/O is performed, and
|
|
/// Event will be signaled when the read request is completed.
|
|
///
|
|
EFI_EVENT Event;
|
|
|
|
///
|
|
/// Defines whether or not the signaled event encountered an error.
|
|
///
|
|
EFI_STATUS TransactionStatus;
|
|
} EFI_BLOCK_IO2_TOKEN;
|
|
|
|
|
|
/**
|
|
Reset the block device hardware.
|
|
|
|
@param[in] This Indicates a pointer to the calling context.
|
|
@param[in] ExtendedVerification Indicates that the driver may perform a more
|
|
exhausive verification operation of the device
|
|
during reset.
|
|
|
|
@retval EFI_SUCCESS The device was reset.
|
|
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
|
|
not be reset.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_RESET_EX) (
|
|
IN EFI_BLOCK_IO2_PROTOCOL *This,
|
|
IN BOOLEAN ExtendedVerification
|
|
);
|
|
|
|
/**
|
|
Read BufferSize bytes from Lba into Buffer.
|
|
|
|
This function reads the requested number of blocks from the device. All the
|
|
blocks are read, or an error is returned.
|
|
If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and
|
|
non-blocking I/O is being used, the Event associated with this request will
|
|
not be signaled.
|
|
|
|
@param[in] This Indicates a pointer to the calling context.
|
|
@param[in] MediaId Id of the media, changes every time the media is
|
|
replaced.
|
|
@param[in] Lba The starting Logical Block Address to read from.
|
|
@param[in, out] Token A pointer to the token associated with the transaction.
|
|
@param[in] BufferSize Size of Buffer, must be a multiple of device block size.
|
|
@param[out] Buffer A pointer to the destination buffer for the data. The
|
|
caller is responsible for either having implicit or
|
|
explicit ownership of the buffer.
|
|
|
|
@retval EFI_SUCCESS The read request was queued if Token->Event is
|
|
not NULL.The data was read correctly from the
|
|
device if the Token->Event is NULL.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while performing
|
|
the read.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
|
|
@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the
|
|
intrinsic block size of the device.
|
|
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
|
|
or the buffer is not on proper alignment.
|
|
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
|
|
of resources.
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_READ_EX) (
|
|
IN EFI_BLOCK_IO2_PROTOCOL *This,
|
|
IN UINT32 MediaId,
|
|
IN EFI_LBA LBA,
|
|
IN OUT EFI_BLOCK_IO2_TOKEN *Token,
|
|
IN UINTN BufferSize,
|
|
OUT VOID *Buffer
|
|
);
|
|
|
|
/**
|
|
Write BufferSize bytes from Lba into Buffer.
|
|
|
|
This function writes the requested number of blocks to the device. All blocks
|
|
are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,
|
|
EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is
|
|
being used, the Event associated with this request will not be signaled.
|
|
|
|
@param[in] This Indicates a pointer to the calling context.
|
|
@param[in] MediaId The media ID that the write request is for.
|
|
@param[in] Lba The starting logical block address to be written. The
|
|
caller is responsible for writing to only legitimate
|
|
locations.
|
|
@param[in, out] Token A pointer to the token associated with the transaction.
|
|
@param[in] BufferSize Size of Buffer, must be a multiple of device block size.
|
|
@param[in] Buffer A pointer to the source buffer for the data.
|
|
|
|
@retval EFI_SUCCESS The write request was queued if Event is not NULL.
|
|
The data was written correctly to the device if
|
|
the Event is NULL.
|
|
@retval EFI_WRITE_PROTECTED The device can not be written to.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while performing the write.
|
|
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
|
|
@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
|
|
or the buffer is not on proper alignment.
|
|
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
|
|
of resources.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_WRITE_EX) (
|
|
IN EFI_BLOCK_IO2_PROTOCOL *This,
|
|
IN UINT32 MediaId,
|
|
IN EFI_LBA LBA,
|
|
IN OUT EFI_BLOCK_IO2_TOKEN *Token,
|
|
IN UINTN BufferSize,
|
|
IN VOID *Buffer
|
|
);
|
|
|
|
/**
|
|
Flush the Block Device.
|
|
|
|
If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED
|
|
is returned and non-blocking I/O is being used, the Event associated with
|
|
this request will not be signaled.
|
|
|
|
@param[in] This Indicates a pointer to the calling context.
|
|
@param[in,out] Token A pointer to the token associated with the transaction
|
|
|
|
@retval EFI_SUCCESS The flush request was queued if Event is not NULL.
|
|
All outstanding data was written correctly to the
|
|
device if the Event is NULL.
|
|
@retval EFI_DEVICE_ERROR The device reported an error while writting back
|
|
the data.
|
|
@retval EFI_WRITE_PROTECTED The device cannot be written to.
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
|
@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
|
|
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
|
|
of resources.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_BLOCK_FLUSH_EX) (
|
|
IN EFI_BLOCK_IO2_PROTOCOL *This,
|
|
IN OUT EFI_BLOCK_IO2_TOKEN *Token
|
|
);
|
|
|
|
///
|
|
/// The Block I/O2 protocol defines an extension to the Block I/O protocol which
|
|
/// enables the ability to read and write data at a block level in a non-blocking
|
|
// manner.
|
|
///
|
|
struct _EFI_BLOCK_IO2_PROTOCOL {
|
|
///
|
|
/// A pointer to the EFI_BLOCK_IO_MEDIA data for this device.
|
|
/// Type EFI_BLOCK_IO_MEDIA is defined in BlockIo.h.
|
|
///
|
|
EFI_BLOCK_IO_MEDIA *Media;
|
|
|
|
EFI_BLOCK_RESET_EX Reset;
|
|
EFI_BLOCK_READ_EX ReadBlocksEx;
|
|
EFI_BLOCK_WRITE_EX WriteBlocksEx;
|
|
EFI_BLOCK_FLUSH_EX FlushBlocksEx;
|
|
};
|
|
|
|
extern EFI_GUID gEfiBlockIo2ProtocolGuid;
|
|
|
|
#endif
|
|
|