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100 lines
3.7 KiB
C
100 lines
3.7 KiB
C
/** @file
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This file defines the EFI Erase Block Protocol.
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Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This Protocol is introduced in UEFI Specification 2.6
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**/
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#ifndef __EFI_ERASE_BLOCK_PROTOCOL_H__
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#define __EFI_ERASE_BLOCK_PROTOCOL_H__
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#define EFI_ERASE_BLOCK_PROTOCOL_GUID \
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{ \
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0x95a9a93e, 0xa86e, 0x4926, { 0xaa, 0xef, 0x99, 0x18, 0xe7, 0x72, 0xd9, 0x87 } \
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}
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typedef struct _EFI_ERASE_BLOCK_PROTOCOL EFI_ERASE_BLOCK_PROTOCOL;
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#define EFI_ERASE_BLOCK_PROTOCOL_REVISION ((2<<16) | (60))
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///
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/// EFI_ERASE_BLOCK_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 erase request is completed.
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//
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EFI_EVENT Event;
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//
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// Defines whether the signaled event encountered an error.
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//
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EFI_STATUS TransactionStatus;
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} EFI_ERASE_BLOCK_TOKEN;
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/**
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Erase a specified number of device blocks.
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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 erase request is for.
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@param[in] LBA The starting logical block address to be
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erased. The caller is responsible for erasing
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only legitimate locations.
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@param[in, out] Token A pointer to the token associated with the
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transaction.
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@param[in] Size The size in bytes to be erased. This must be
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a multiple of the physical block size of the
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device.
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@retval EFI_SUCCESS The erase request was queued if Event is not
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NULL. The data was erased correctly to the
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device if the Event is NULL.to the device.
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@retval EFI_WRITE_PROTECTED The device cannot be erased due to write
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protection.
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@retval EFI_DEVICE_ERROR The device reported an error while attempting
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to perform the erase operation.
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@retval EFI_INVALID_PARAMETER The erase request contains LBAs that are not
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valid.
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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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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_BLOCK_ERASE) (
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IN EFI_ERASE_BLOCK_PROTOCOL *This,
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IN UINT32 MediaId,
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IN EFI_LBA LBA,
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IN OUT EFI_ERASE_BLOCK_TOKEN *Token,
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IN UINTN Size
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);
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///
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/// The EFI Erase Block Protocol provides the ability for a device to expose
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/// erase functionality. This optional protocol is installed on the same handle
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/// as the EFI_BLOCK_IO_PROTOCOL or EFI_BLOCK_IO2_PROTOCOL.
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///
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struct _EFI_ERASE_BLOCK_PROTOCOL {
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//
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// The revision to which the EFI_ERASE_BLOCK_PROTOCOL 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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//
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// Returns the erase length granularity as a number of logical blocks. A
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// value of 1 means the erase granularity is one logical block.
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//
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UINT32 EraseLengthGranularity;
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EFI_BLOCK_ERASE EraseBlocks;
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};
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extern EFI_GUID gEfiEraseBlockProtocolGuid;
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#endif
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