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201 lines
8.0 KiB
C
201 lines
8.0 KiB
C
/** @file
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Block IO2 protocol as defined in the UEFI 2.3.1 specification.
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The Block IO2 protocol defines an extension to the Block IO protocol which
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enables the ability to read and write data at a block level in a non-blocking
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manner.
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Copyright (c) 2011 - 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 __BLOCK_IO2_H__
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#define __BLOCK_IO2_H__
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#include <Protocol/BlockIo.h>
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#define EFI_BLOCK_IO2_PROTOCOL_GUID \
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{ \
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0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \
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}
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typedef struct _EFI_BLOCK_IO2_PROTOCOL EFI_BLOCK_IO2_PROTOCOL;
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/**
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The struct of Block 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.If Event is not NULL and
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/// non-blocking I/O is supported, then non-blocking I/O is performed, and
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/// Event will be signaled when the read request is completed.
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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_BLOCK_IO2_TOKEN;
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/**
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Reset the block device hardware.
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@param[in] This Indicates a pointer to the calling context.
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@param[in] ExtendedVerification Indicates that the driver may perform a more
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exhausive verification operation of the device
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during reset.
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@retval EFI_SUCCESS The device was reset.
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@retval EFI_DEVICE_ERROR The device is not functioning properly and could
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not be reset.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_RESET_EX) (
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IN EFI_BLOCK_IO2_PROTOCOL *This,
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IN BOOLEAN ExtendedVerification
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);
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/**
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Read BufferSize bytes from Lba into Buffer.
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This function reads the requested number of blocks from the device. All the
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blocks are read, or an error is returned.
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If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and
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non-blocking I/O is being used, the Event associated with this request will
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not be signaled.
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@param[in] This Indicates a pointer to the calling context.
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@param[in] MediaId Id of the media, changes every time the media is
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replaced.
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@param[in] Lba The starting Logical Block Address to read from.
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@param[in, out] Token A pointer to the token associated with the transaction.
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@param[in] BufferSize Size of Buffer, must be a multiple of device block size.
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@param[out] Buffer A pointer to the destination buffer for the data. The
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caller is responsible for either having implicit or
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explicit ownership of the buffer.
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@retval EFI_SUCCESS The read request was queued if Token->Event is
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not NULL.The data was read correctly from the
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device if the Token->Event is NULL.
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@retval EFI_DEVICE_ERROR The device reported an error while performing
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the read.
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@retval EFI_NO_MEDIA There is no media in the device.
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@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
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@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the
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intrinsic block size of the device.
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@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
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or the buffer is not on proper alignment.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
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of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_READ_EX) (
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IN EFI_BLOCK_IO2_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN OUT EFI_BLOCK_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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Write BufferSize bytes from Lba into Buffer.
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This function writes the requested number of blocks to the device. All blocks
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are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,
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EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is
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being used, the Event associated with this request will not be signaled.
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@param[in] This Indicates a pointer to the calling context.
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@param[in] MediaId The media ID that the write request is for.
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@param[in] Lba The starting logical block address to be written. The
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caller is responsible for writing to only legitimate
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locations.
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@param[in, out] Token A pointer to the token associated with the transaction.
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@param[in] BufferSize Size of Buffer, must be a multiple of device block size.
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@param[in] Buffer A pointer to the source buffer for the data.
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@retval EFI_SUCCESS The write request was queued if Event is not NULL.
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The data was written correctly to the device if
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the Event is NULL.
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@retval EFI_WRITE_PROTECTED The device can not be written to.
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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_DEVICE_ERROR The device reported an error while performing the write.
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@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
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@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
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or the buffer is not on proper alignment.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
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of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_WRITE_EX) (
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IN EFI_BLOCK_IO2_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN OUT EFI_BLOCK_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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Flush the Block Device.
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If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED
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is returned and non-blocking I/O is being used, the Event associated with
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this request will not be signaled.
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@param[in] This Indicates a pointer to the calling context.
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@param[in,out] Token A pointer to the token associated with the transaction
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@retval EFI_SUCCESS The flush request was queued if Event is not NULL.
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All outstanding data was written correctly to the
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device if the Event is NULL.
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@retval EFI_DEVICE_ERROR The device reported an error while writting back
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the data.
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@retval EFI_WRITE_PROTECTED The device cannot be written to.
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@retval EFI_NO_MEDIA There is no media in the device.
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@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
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of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_FLUSH_EX) (
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IN EFI_BLOCK_IO2_PROTOCOL *This,
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IN OUT EFI_BLOCK_IO2_TOKEN *Token
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);
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///
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/// The Block I/O2 protocol defines an extension to the Block I/O protocol which
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/// enables the ability to read and write data at a block level in a non-blocking
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// manner.
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///
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struct _EFI_BLOCK_IO2_PROTOCOL {
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///
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/// A pointer to the EFI_BLOCK_IO_MEDIA data for this device.
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/// Type EFI_BLOCK_IO_MEDIA is defined in BlockIo.h.
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///
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EFI_BLOCK_IO_MEDIA *Media;
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EFI_BLOCK_RESET_EX Reset;
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EFI_BLOCK_READ_EX ReadBlocksEx;
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EFI_BLOCK_WRITE_EX WriteBlocksEx;
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EFI_BLOCK_FLUSH_EX FlushBlocksEx;
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};
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extern EFI_GUID gEfiBlockIo2ProtocolGuid;
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#endif
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