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EDK2 doxygen online documents - Firmware Encoding Index
Data Fields

EFI_BLOCK_IO_MEDIA Struct Reference

#include <BlockIo.h>

Data Fields

UINT32 MediaId
BOOLEAN RemovableMedia
BOOLEAN MediaPresent
BOOLEAN LogicalPartition
BOOLEAN ReadOnly
BOOLEAN WriteCaching
UINT32 BlockSize
UINT32 IoAlign
EFI_LBA LastBlock
EFI_LBA LowestAlignedLba
UINT32 LogicalBlocksPerPhysicalBlock
UINT32 OptimalTransferLengthGranularity

Detailed Description

Block IO read only mode data and updated only via members of BlockIO

Definition at line 175 of file BlockIo.h.


Field Documentation

The intrinsic block size of the device. If the media changes, then this field is updated.

Definition at line 184 of file BlockIo.h.

Supplies the alignment requirement for any buffer to read or write block(s).

Definition at line 185 of file BlockIo.h.

The last logical block address on the device. If the media changes, then this field is updated.

Definition at line 187 of file BlockIo.h.

Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to EFI_BLOCK_IO_PROTOCOL_REVISION2. Returns the number of logical blocks per physical block.

Definition at line 190 of file BlockIo.h.

TRUE if LBA 0 is the first block of a partition; otherwise FALSE. For media with only one partition this would be TRUE.

Definition at line 180 of file BlockIo.h.

Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to EFI_BLOCK_IO_PROTOCOL_REVISION2. Returns the first LBA is aligned to a physical block boundary.

Definition at line 189 of file BlockIo.h.

The curent media Id. If the media changes, this value is changed.

Definition at line 176 of file BlockIo.h.

TRUE if there is a media currently present in the device; othersise, FALSE. THis field shows the media present status as of the most recent ReadBlocks() or WriteBlocks() call.

Definition at line 178 of file BlockIo.h.

Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to EFI_BLOCK_IO_PROTOCOL_REVISION3. Returns the optimal transfer length granularity as a number of logical blocks.

Definition at line 205 of file BlockIo.h.

TRUE if the media is marked read-only otherwise, FALSE. This field shows the read-only status as of the most recent WriteBlocks () call.

Definition at line 181 of file BlockIo.h.

TRUE if the media is removable; otherwise, FALSE.

Definition at line 177 of file BlockIo.h.

TRUE if the WriteBlock () function caches write data.

Definition at line 182 of file BlockIo.h.


The documentation for this struct was generated from the following files:
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