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

#include <BlockIo.h>

Data Fields
UINT32	MediaId
	The curent media Id. More...

BOOLEAN	RemovableMedia
	TRUE if the media is removable; otherwise, FALSE. More...

BOOLEAN	MediaPresent
	TRUE if there is a media currently present in the device; othersise, FALSE. More...

BOOLEAN	LogicalPartition
	TRUE if LBA 0 is the first block of a partition; otherwise FALSE. More...

BOOLEAN	ReadOnly
	TRUE if the media is marked read-only otherwise, FALSE. More...

BOOLEAN	WriteCaching
	TRUE if the WriteBlock () function caches write data. More...

UINT32	BlockSize
	The intrinsic block size of the device. More...

UINT32	IoAlign
	Supplies the alignment requirement for any buffer to read or write block(s). More...

EFI_LBA	LastBlock
	The last logical block address on the device. More...

EFI_LBA	LowestAlignedLba
	Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to EFI_BLOCK_IO_PROTOCOL_REVISION2. More...

UINT32	LogicalBlocksPerPhysicalBlock
	Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to EFI_BLOCK_IO_PROTOCOL_REVISION2. More...

UINT32	OptimalTransferLengthGranularity
	Only present if EFI_BLOCK_IO_PROTOCOL.Revision is greater than or equal to EFI_BLOCK_IO_PROTOCOL_REVISION3. More...

Detailed Description

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

Definition at line 130 of file BlockIo.h.

Field Documentation

◆ MediaId

UINT32 EFI_BLOCK_IO_MEDIA::MediaId

The curent media Id.

If the media changes, this value is changed.

Definition at line 134 of file BlockIo.h.

◆ RemovableMedia

BOOLEAN EFI_BLOCK_IO_MEDIA::RemovableMedia

TRUE if the media is removable; otherwise, FALSE.

Definition at line 139 of file BlockIo.h.

◆ MediaPresent

BOOLEAN EFI_BLOCK_IO_MEDIA::MediaPresent

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 146 of file BlockIo.h.

◆ LogicalPartition

BOOLEAN EFI_BLOCK_IO_MEDIA::LogicalPartition

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 152 of file BlockIo.h.

◆ ReadOnly

BOOLEAN EFI_BLOCK_IO_MEDIA::ReadOnly

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 158 of file BlockIo.h.

◆ WriteCaching

BOOLEAN EFI_BLOCK_IO_MEDIA::WriteCaching

TRUE if the WriteBlock () function caches write data.

Definition at line 163 of file BlockIo.h.

◆ BlockSize

UINT32 EFI_BLOCK_IO_MEDIA::BlockSize

The intrinsic block size of the device.

If the media changes, then this field is updated.

Definition at line 169 of file BlockIo.h.

◆ IoAlign

UINT32 EFI_BLOCK_IO_MEDIA::IoAlign

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

Definition at line 174 of file BlockIo.h.

◆ LastBlock

EFI_LBA EFI_BLOCK_IO_MEDIA::LastBlock

The last logical block address on the device.

If the media changes, then this field is updated.

Definition at line 180 of file BlockIo.h.

◆ LowestAlignedLba

EFI_LBA EFI_BLOCK_IO_MEDIA::LowestAlignedLba

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 187 of file BlockIo.h.

◆ LogicalBlocksPerPhysicalBlock

UINT32 EFI_BLOCK_IO_MEDIA::LogicalBlocksPerPhysicalBlock

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 194 of file BlockIo.h.

◆ OptimalTransferLengthGranularity

UINT32 EFI_BLOCK_IO_MEDIA::OptimalTransferLengthGranularity

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 201 of file BlockIo.h.

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

include/ipxe/efi/Protocol/BlockIo.h

Data Fields